From claird at lairds.us  Thu Aug 23 11:28:28 2007
From: claird at lairds.us (Cameron Laird)
Date: Thu, 23 Aug 2007 15:28:28 +0000
Subject: simple spider in python
References: <1187876014.845912.236690@e9g2000prf.googlegroups.com>
	<1187879398.007797.128510@i13g2000prf.googlegroups.com>
	<1187880988.813113.20350@l22g2000prc.googlegroups.com>
Message-ID: <sll0q4-79t.ln1@lairds.us>

In article <1187880988.813113.20350 at l22g2000prc.googlegroups.com>,
 <gmcalendar at gmail.com> wrote:
>thanks everybody, soooo kind. I'll take a look at booth.
>have a nice day/night (depending on your latitude!) ^_^
>
>ciao!
>

Somewhere in the middle between the two suggestions you've already
received is <URL: http://www.unixreview.com/documents/s=10133/ur0706e/ >.


From hancock.robert at gmail.com  Wed Aug 22 11:39:23 2007
From: hancock.robert at gmail.com (milan_sanremo)
Date: Wed, 22 Aug 2007 15:39:23 -0000
Subject: chmod g+ Equivalent
In-Reply-To: <mailman.1988.1187134232.22759.python-list@python.org>
References: <1187042290.821786.178420@19g2000hsx.googlegroups.com>
	<mailman.1946.1187053563.22759.python-list@python.org>
	<1187094251.540591.308320@g4g2000hsf.googlegroups.com>
	<mailman.1988.1187134232.22759.python-list@python.org>
Message-ID: <1187797163.590430.158330@r23g2000prd.googlegroups.com>

On Aug 14, 7:30 pm, Steve Holden <st... at holdenweb.com> wrote:
> milan_sanremo wrote:
> > On Aug 13, 8:06 pm, Steve Holden <st... at holdenweb.com> wrote:
> >> milan_sanremo wrote:
> >>> I've read the documentation on os.chmod() and can implement all the
> >>> standard commands, but what is the syntax for the equivalent of chmod g
> >>> + to set the group id?
> >> I assume when you say "to set the group id" you actually mean "to assert
> >> the setgid bit"? I further presume that when you say "chmod g+" you
> >> actually mean "chmod g+s".
>
> > The g+s was an omission on my part.  I can see how it would confuse
> > the issue.
>
> > I'm not sure if I mean "to assert the setgid bit".  My SUN docs refer
> > to it being 'on'.
> >http://docs.sun.com/app/docs/doc/819-3321/6n5i4b767?l=en&a=view&q=set...
>
> >> You can't have read the documentation very thoroughly. It says right at
> >> the top:
>
> >> S_ISUID
> >> S_ISGID
>
> > I did see this in the documentation:
>
> > Change the mode of path to the numeric mode. mode may take one of the
> > following values (as defined in the stat module) or bitwise or-ed
> > combinations of them:
>
> >     * S_ISUID
> >     * S_ISGID
>
> > Which refers to:
> >http://docs.python.org/lib/module-stat.html
>
> > After which it was still unclear.
>
> > My question is in the command os.chmod(myDirectory, ?) what is the
> > value for ? to turn on the setgid bit.
>
> > Contrary to your presumption, I did read the documentation
> > thoroughly.  It is inability to understand the concept which prompted
> > me to post the question here.
>
> Well, you don't tell us what (if anything) you have tried so far. Python
> has an interpreter that's very easy to use interactively. Why don't you try
>
>      os.chmod(my_directory, os.S_ISGID)
>
> and see if it does what you want? You can often save time by trying such
> things for yourself. Though it needn't be a substitute for asking
> questions on this list, it can make your questions better-informed.
>
> In this particular case, now I understand your needs a little better,
> since you want to *add* a bit setting you will likely have to use
> something like
>
>      current_permissions = os.fstat(my_directory).ST_MODE
>
> to read the directory's current permission bits. Then you will need to
> execute
>
>      os.chmod(my_directory, current_permissions | stat.S_ISGID)
>
> Please don't take this as gospel, though, as I am currently on the road
> with only a Windows computer available, but I think it should get you
> closer to where you want to be.
>
> regards
>   Steve
> --

os.chmod(my_directory, cur_permissions | (stat.S_ISGID | 8)) gave the
equivalent of chmod g+s.



From mcfletch at vrplumber.com  Mon Aug 20 10:44:22 2007
From: mcfletch at vrplumber.com (Mike C. Fletcher)
Date: Mon, 20 Aug 2007 10:44:22 -0400
Subject: Call for advice on how to start PyOpenGL!
In-Reply-To: <1187589198.616866.280500@j4g2000prf.googlegroups.com>
References: <1187589198.616866.280500@j4g2000prf.googlegroups.com>
Message-ID: <46C9A8C6.9010402@vrplumber.com>

math2life wrote:
> I work with python for two years, are familiar with image processing,
> but beginner on PyOpenGL and OpenGL.
>
> Any advice appreciated!
>   
As has been mentioned, the NeHe tutorials[1] are a good starting point.  
There are (multiple) translations of the first 8 or so and then some 
cherry-picked translations further along the set.  There is a set of 
OpenGL demo/sample code available[2] as a separate download from the 3.x 
series (these files are mostly included in the 2.x series, though there 
is new material in the 3.x set).  OpenGLContext also has a large number 
of simple samples, though I've still got "release OpenGLContext" on my 
seemingly infinitely long and growing todo list, so that might not be 
the easiest way to start.

The "Red Book" is an older standard manual for getting started with (C) 
OpenGL code, often you can find older editions online for free.  There 
are hundreds of C tutorials hanging around the net that normally 
translate easily into Python/PyOpenGL.  The PyOpenGL manual pages *try* 
to have links to source code, but unfortunately the (java, ick!) based 
system that generates the base files has been broken for a while and I 
haven't had time to fix it properly so I can re-run the generator to 
update the links.  In the meantime, Google's code search helps a lot 
when you restrict to Python code.[3]

HTH,
Mike

[1] http://nehe.gamedev.net
[2] 
http://sourceforge.net/project/showfiles.php?group_id=5988&package_id=221827
[3] http://www.google.com/codesearch?q=lang%3Apython

-- 
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com



From linnewbie at gmail.com  Sun Aug 12 13:50:06 2007
From: linnewbie at gmail.com (linnewbie at gmail.com)
Date: Sun, 12 Aug 2007 17:50:06 -0000
Subject: Regular Expression Grouping
In-Reply-To: <46bf43fe$0$10626$4fafbaef@reader2.news.tin.it>
References: <1186939262.144073.182450@z24g2000prh.googlegroups.com>
	<46bf43fe$0$10626$4fafbaef@reader2.news.tin.it>
Message-ID: <1186941006.758681.243340@q4g2000prc.googlegroups.com>

On Aug 12, 1:31 pm, Fabio Z Tessitore <fabioztessit... at libero.it>
wrote:
> Il Sun, 12 Aug 2007 17:21:02 +0000, linnewbie ha scritto:
>
> > Fairly new to this regex thing, so this might be very juvenile but
> > important.
>
> > I cannot understand and why 'c' constitutes a group here without being
> > surrounded by "(" ,")" ?
>
> >>>>import re
> >>>> m = re.match("([abc])+", "abc")
> >>>> m.groups()
> > ('c',)
>
> > Grateful for any clarity.
>
> thera are () outer [], maybe you don't know what do [] mean? or you want
> to know why 'c' and not 'a' or 'b'
> bye

I sort of get what the metacharacters  "(", ")"  and "[" ,"]" , groups
are marked by the "(", ")" no?

So I get this:

>>> import re
>>> re.match("ab(c)d","abcd")
<_sre.SRE_Match object at 0xb7d72c60>
>>> m= re.match("ab(c)d","abcd")
>>> m.groups()
('c',)

I can see clearly here that 'c' is group(1), because of the "..(c)..
".  I cannot see how 'c' is a inner group in the expressions "([abc])
+" above?








From joesox at gmail.com  Tue Aug 21 09:42:46 2007
From: joesox at gmail.com (JoeSox)
Date: Tue, 21 Aug 2007 06:42:46 -0700
Subject: Python project solicitation
In-Reply-To: <1187701752.661991.144690@q3g2000prf.googlegroups.com>
References: <mailman.41.1187663747.32294.python-list@python.org>
	<1187701752.661991.144690@q3g2000prf.googlegroups.com>
Message-ID: <785694cd0708210642g736471f0kd3a761b12aba8ba5@mail.gmail.com>

On 8/21/07, Greg Copeland <gtcopeland at gmail.com> wrote:
>
> On Aug 20, 9:35 pm, JoeSox <joe... at gmail.com> wrote:
> > I must say this thing is pretty cool.  I had a coworker try it out and
> > he ran into problems getting it to run on his Linux OS.  So I am
> > really looking for some non-Windows developers to take a look at it.
> > All of the info is at the project site above.
> > Thanks.
> >
>
> I looked at it real quick.  You need to use os.path.join for your file
> paths.  You also need to use sys.platform for windows specific
> processing.  For example:
>
> if sys.platform == 'Win32':
>   FS_ROOT = 'C:'
> else:
>   FS_ROOT = '/'
>
> WORDNETPATH=os.path.join( FS_ROOT, 'WordNet', '2.1', 'dict' )
>
> So on and so on.  You wrote it very MSWin centric so it is not a
> surprise it has trouble of on other platforms.  All of your file
> references need to be adjusted as above using os.path.join.
>
> Keep in mind I only looked at it real quick.  Those appear to be the
> cross platform deal killers.  Short of something I missed (could
> have), it should work find on most any other platform once you take
> out the Windows-isms.

Excellent. I will look at this.  Being a hobbyist programmer, I am use
to writing code just for a Windows environment. I've only been using
Python for a year or so and I never could get into Java.

-- 
Later, Joe


From lasses_weil at klapptsowieso.net  Thu Aug 30 20:12:36 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Fri, 31 Aug 2007 02:12:36 +0200
Subject: strings (dollar.cents) into floats
In-Reply-To: <877incd20i.fsf@benfinney.id.au>
References: <mailman.140.1188483282.28954.python-list@python.org>
	<877incd20i.fsf@benfinney.id.au>
Message-ID: <46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>

Ben Finney wrote:
> You most likely do *not* want floating-point numbers for currency,
> since they rely on the operating system's binary floating point
> support which cannot accurately represent decimal fractions.
> 

I've heard (ok, read) that several times now and I understand the 
argument. But what use is there for floats, then? When is it OK to use them?

/W


From tonylabarbara at aol.com  Tue Aug 14 15:47:02 2007
From: tonylabarbara at aol.com (tonylabarbara at aol.com)
Date: Tue, 14 Aug 2007 15:47:02 -0400
Subject: Form-Through-Script Nightmare
Message-ID: <8C9ACC304FF3A9E-DD0-22B2@WEBMAIL-DC12.sysops.aol.com>

Hi;
I originally submitted this to the Zope list, but after no replies and realizing it's probably better suited for the python list, I'm submitting it here.


I have a form where purchasers can deselect items they've added to their shopping cart. All the hidden fields have been numbered according to the items they *originally* selected. If they deselect an item, then it will probably necessitate a renumbering of all those hidden fields, since PayPal doesn't tolerate misnumbering: everything must be numbered "1" for all the hidden fields of the first product, "2" for the second, etc. If the customer selects 5 products and deletes the 3rd, then I need to renumber. I wrote a script that can do that. Now, I have to send the form to that script, with all its lovely hidden fields, then reproduce it somewhere so I can send it off to PP. That is, the form must return from the called script to a new page and deliver all the renumbered hidden fields. 

?

Let me summarize what I've written before to put in one post exactly what's going on:


1)?I have a form that I need to send to a script and then send off to a URL (PayPal). I need to process it through the script to renumber things for PP. How do I do this? I imagine I add an element to the PT like so:

<form action="renumberTheCart(here/CheckOutAfterEditStuff)" method="post">

but I need to pass a parameter "doc", which, of course, is the document I'm submitting. So I tried this:

<form action="renumberTheCart(here/CheckOutAfterEditStuff)" method="post">
<p metal:use-macro="here/CheckOutAfterEditStuff/macros/main" />

which renders my page fine, but throws an error when I submit the form:

Cannot locate object at: http://example.com/s/c/x/j/en-us/s/renumberTheCart%28here

meaning, of course, that it didn't receive the required parameter.

2) I changed it to an absolute URL just to double-check, and got basically the same error:
?

Invalid request

The parameter, doc, was omitted from the request. 


How do I pass the parameter, which in my case is quite long and stashed neatly away in a PT macro?

<td tal:define="docs here/CheckOutAfterEditStuff">
<form action=http://example.com/s/renumberTheCart?doc=docs" method="post">?
<p metal:use-macro="here/CheckOutAfterEditStuff/macros/main" />?
</td>


Now, Tom Von Lahndorff suggested the following:


Sounds like the script should check to see if the user is removing something like:

<input type="checkbox" name="remove" value="item-374623746">




if remove

remove the item

redirect back to the udpated form page

else

send to PP




this way once the item is removed and the same script is called, since there's no remove this time, it'll go to PP.


I would LOVE to do that...if I knew how! Any ideas?
TIA,
Tony




?

Invalid request

The parameter, doc, was omitted from the request. 


How do I pass the parameter, which in my case is quite long and stashed neatly away in a PT macro?

<td tal:define="docs here/CheckOutAfterEditStuff">
<form action=http://example.com/s/renumberTheCart?doc=docs" method="post">?
<p metal:use-macro="here/CheckOutAfterEditStuff/macros/main" />?
</td>


Now, Tom Von Lahndorff suggested the following:


Sounds like the script should check to see if the user is removing something like:

<input type="checkbox" name="remove" value="item-374623746">




if remove

remove the item

redirect back to the udpated form page

else

send to PP




this way once the item is removed and the same script is called, since there's no remove this time, it'll go to PP.


I would LOVE to do that...if I knew how! Any ideas?
TIA,
Tony



________________________________________________________________________
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From rcdailey at gmail.com  Wed Aug 22 17:47:09 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Wed, 22 Aug 2007 16:47:09 -0500
Subject: Class destruction
In-Reply-To: <46CC8482.9040100@gmx.de>
References: <496954360708221117pd7465fr838a24b167a1dcdd@mail.gmail.com>
	<46CC8482.9040100@gmx.de>
Message-ID: <496954360708221447l3c72e6dcqd82d46ecd64c9a38@mail.gmail.com>

Thanks; I'll give it a try.

On 8/22/07, Nils Oliver Kr?ger <NO_Kroeger at gmx.de> wrote:
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Robert Dailey schrieb:
> > Hi,
> >
> > I'm wondering where the most appropriate location is to cleanup class
> > objects. For example, i have a file handle as an instance attribute in
> one
> > of my classes and I need to call f.close() on it when the class object
> falls
> > out of scope. Any ideas? I've tried __del__() but I don't remember this
> > working for some reason. I might try it again later just to be positive.
>
> __del__(self) is the perfectly right place for such cleanup ... it gets
> called once your instance is either deleted explicitly by you or it's
> handled by the garbage collector when there are no more references.
>
> The possible problem why this did not work four you is, that the
> destruction by the garbage collector cannot be predicted ... it may well
> take some time. If you try to open the same file from another class
> before yours gets cleaned you run into trouble.
>
> If you want to "reuse" the file, you will have to delete your classes
> instance explicitly using the del statement ... this will also call the
> destructor.
>
> The below code works fine:
>
>     def __del__( self ):
>         self._file.close()
>         print "File closed"
>
> Hope that helps ... Nils
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.6 (MingW32)
> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
>
> iD8DBQFGzISBzvGJy8WEGTcRAiOwAJ94fJza4/GVQsFmbXwsP8kdvQjV5wCfQktw
> F/zPJAw0ayjYe5MGxPR1YqI=
> =4Hl6
> -----END PGP SIGNATURE-----
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From paul at boddie.org.uk  Mon Aug  6 08:07:45 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Mon, 06 Aug 2007 05:07:45 -0700
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <7xzm15q8fy.fsf@ruckus.brouhaha.com>
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
Message-ID: <1186402065.085131.66090@22g2000hsm.googlegroups.com>

On 6 Aug, 12:11, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Carsten Haese <cars... at uniqsys.com> writes:
> > For instance, if you never use print statements in your code, you won't
> > notice that print is becoming a function. If you do, you'll have to make
> > appropriate accommodations.
>
> Why on earth did they make this change?  It just seems gratuitous.  Is
> the assert statement also being changed?  Are they going to update all
> the docs that say that the yield statement works like the print statement?

Indeed: practicality beats purity [1]. Uh, wait a moment!

Paul

[1] http://www.python.org/dev/culture/



From gherzig at fmed.uba.ar  Fri Aug 31 09:36:40 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Fri, 31 Aug 2007 10:36:40 -0300
Subject: pure python for sms
In-Reply-To: <BtHBi.28617$4A1.5445@news-server.bigpond.net.au>
References: <mailman.161.1188500323.28954.python-list@python.org>
	<BtHBi.28617$4A1.5445@news-server.bigpond.net.au>
Message-ID: <46D81968.60303@fmed.uba.ar>

Neil Hodgson wrote:

>Gerardo Herzig:
>
>  
>
>>Hi dudes. Im looking for a python implementation for sending sms to a 
>>cell phone. I was try using some free pages, but i want to use a python. 
>>Do i need a cellphone conected to my machine? Or can i send sms to some 
>>cell via some python library?
>>    
>>
>
>    This is likely to cost some money similar to sending an SMS from a 
>'phone. There are several companies that provide SMS sending services 
>that can be accessed through HTTP. Have a look at www.clickatell.com and 
>www.aql.com . Here is a library based on Clickatell:
>http://www.powertrip.co.za/code/python/clickatell.py
>
>    Neil
>  
>
Well, im not triyng to send a SMS `FROM' a cellphone, im trying to send 
a SMS `TO' a cellphone. Here (in Argentina) are several sites who lets 
you send a sms for free. You also can receive SMS responses via this page
http://sms.personal.com.ar/Mensajes/msn.htm

While my tries using this page via urllib failed, i dont want to depend 
on an external page anyway. The  python class you  send to me looks like 
a  pay site (if not, i dont see why the tokenpay() and getbalance() 
methods :)

I was also avaiable to send a sms in the form of an plain email 
__cellphone_number at i_used_to_be_cool_smtp.com, but it not seems to work 
this way no longer. Again, i dont want to do it that way anyway.

Thats why im looking for a python implementation of that funcionality.

Thanks!
Gerardo


From nospam.themindstorm at gmail.com  Thu Aug  2 04:10:49 2007
From: nospam.themindstorm at gmail.com (Alex Popescu)
Date: Thu, 2 Aug 2007 08:10:49 +0000 (UTC)
Subject: a dict trick
References: <1186036331.304916.304020@e9g2000prf.googlegroups.com>
Message-ID: <Xns998071636E977themindstorm@80.91.229.5>

james_027 <cai.haibin at gmail.com> wrote in news:1186036331.304916.304020
@e9g2000prf.googlegroups.com:

> hi
> 
> for example I have this dictionary
> 
> dict = {'name':'james', 'language':'english'}
> 
> value = 'sex' in dict and dict['sex'] or 'unknown'
> 
> is a right pythonic of doing this one? I am trying to get a value from
> the dict, but if the key doesn't exist I will provide one.
> 
> THanks
> james
> 

Same question discussed at large not far ago:
subject: "Pythonic way of missing dict keys" [1]

bests,
./alex
--
.w( the_mindstorm )p.

[1] 
http://groups.google.com/group/comp.lang.python/browse_thread/thread/175eb4
5909a05a18



From marduk at nbk.hopto.org  Thu Aug  2 16:01:27 2007
From: marduk at nbk.hopto.org (marduk)
Date: Thu, 02 Aug 2007 15:01:27 -0500
Subject: Berkely Db. How to iterate over large number of keys "quickly"
In-Reply-To: <1186083838.318952.254370@q3g2000prf.googlegroups.com>
References: <1186083838.318952.254370@q3g2000prf.googlegroups.com>
Message-ID: <1186084887.23192.56.camel@blackwidow.nbk>

On Thu, 2007-08-02 at 19:43 +0000, lazy wrote:
> I have a berkely db and Im using the bsddb module to access it. The Db
> is quite huge (anywhere from 2-30GB). I want to iterate over the keys
> serially.
> I tried using something basic like
> 
> for key in db.keys()
> 
> but this takes lot of time. I guess Python is trying to get the list
> of all keys first and probbaly keep it in memory. Is there a way to
> avoid this, since I just want to access keys serially. I mean is there
> a way I can tell Python to not load all keys, but try to access it as
> the loop progresses(like in a linked list). I could find any accessor
> methonds on bsddb to this with my initial search.
> I am guessing BTree might be a good choice here, but since while the
> Dbs were written it was opened using hashopen, Im not able to use
> btopen when I want to iterate over the db.
> 

try instead

key = db.firstkey()
while key != None:
    # do something with db[key]
    key = db.nextkey(key)




From jmtulloss at gmail.com  Fri Aug 10 12:37:19 2007
From: jmtulloss at gmail.com (Justin T.)
Date: Fri, 10 Aug 2007 16:37:19 -0000
Subject: The Future of Python Threading
In-Reply-To: <mailman.1825.1186743148.22759.python-list@python.org>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<mailman.1825.1186743148.22759.python-list@python.org>
Message-ID: <1186763839.203679.110810@z24g2000prh.googlegroups.com>

On Aug 10, 3:52 am, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Fri, 10 Aug 2007 10:01:51 -0000, "Justin T." <jmtull... at gmail.com> wrote:
> >Hello,
>
> >While I don't pretend to be an authority on the subject, a few days of
> >research has lead me to believe that a discussion needs to be started
> >(or continued) on the state and direction of multi-threading python.
>
> > [snip - threading in Python doesn't exploit hardware level parallelism
> >  well, we should incorporate stackless and remove the GIL to fix this]
>
> I think you have a misunderstanding of what greenlets are.  Greenlets are
> essentially a non-preemptive user-space threading mechanism.  They do not
> allow hardware level parallelism to be exploited.

I'm not an expert, but I understand that much. What greenlets do is
force the programmer to think about concurrent programming. It doesn't
force them to think about real threads, which is good, because a
computer should take care of that for you.Greenlets are nice because
they can run concurrently, but they don't have to. This means you can
safely divide them up among many threads. You could not safely do this
with just any old python program.

>
> >There has been much discussion on this in the past [2]. Those
> >discussions, I feel, were premature. Now that stackless is mature (and
> >continuation free!), Py3k is in full swing, and parallel programming
> >has been fully realized as THE next big problem for computer science,
> >the time is ripe for discussing how we will approach multi-threading
> >in the future.
>
> Many of the discussions rehash the same issues as previous ones.  Many
> of them are started based on false assumptions or are discussions between
> people who don't have a firm grasp of the relevant issues.

That's true, but there are actually a lot of good ideas in there as
well.

>
> I don't intend to suggest that no improvements can be made in this area of
> Python interpreter development, but it is a complex issue and cheerleading
> will only advance the cause so far.  At some point, someone needs to write
> some code.  Stackless is great, but it's not the code that will solve this
> problem.
Why not? It doesn't solve it on its own, but its a pretty good start
towards something that could.



From monty.python at fastmail.fm  Wed Aug 22 04:52:06 2007
From: monty.python at fastmail.fm (David N Montgomery)
Date: Wed, 22 Aug 2007 09:52:06 +0100
Subject: How to optimise this code?
In-Reply-To: <1187750385.511936.318560@i13g2000prf.googlegroups.com>
References: <mailman.68.1187711977.32294.python-list@python.org>
	<faf33r$rb8$01$1@news.t-online.com>
	<1187750385.511936.318560@i13g2000prf.googlegroups.com>
Message-ID: <1187772726.2139.1206656721@webmail.messagingengine.com>

On Wed, 22 Aug 2007 02:39:45 -0000, "Basilisk96" <basilisk96 at gmail.com>
said:
> David,
> 
> If your true design intent is to run X number of test cases, unittest
> is the biggest bang for your buck, like shown by Peter's example. You
> just subclass unittest.TestCase, and def your test methods in the
> class body; they will simply be executed in the order you list them.
> It's just nice how it works that way.
> 
> Otherwise, the function factory approach like Hrvoje's
>    functionToCall = getattr(self, "testCase%s" % tc)
> is the best optimization.
> 
> Cheers,
> -Basilisk96
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list


Thank you all - the assistance is much appreciated.

unittest is the best choice for my needs and works perfectly in Eclipse.
Unfortunately though it (and many other things) does not work under the
application we have to use to run our python scripts.

This leaves me with 'functionToCall = getattr(self, "testCase%s" % tc)'.
This achieves the optimisation/simplification I had been looking for.

Thank you once again.


From rodrigo.cr at gmail.com  Tue Aug 28 14:13:12 2007
From: rodrigo.cr at gmail.com (rodrigo)
Date: Tue, 28 Aug 2007 18:13:12 -0000
Subject: Check for dict key existence, and modify it in one step.
In-Reply-To: <mailman.69.1188315800.28954.python-list@python.org>
References: <1188311810.226363.295500@w3g2000hsg.googlegroups.com>
	<mailman.69.1188315800.28954.python-list@python.org>
Message-ID: <1188324792.670603.208980@r29g2000hsg.googlegroups.com>

evan,

yes, it does help. Works like it should:

class CountingDictionary(dict):
    def increment(self, key, delta=1):
        self[key] = self.get(key, 0) + delta

d = CountingDictionary()
d.increment('cat')
d.increment('dog',72)
print d

>>> {'dog': 72, 'cat': 1}

Thanks!



From wolf_tracks at invalid.com  Wed Aug 22 15:32:38 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Wed, 22 Aug 2007 19:32:38 GMT
Subject: What Are These Import/From Statements about?
In-Reply-To: <mailman.123.1187804723.32294.python-list@python.org>
References: <un_yi.34471$2v1.24183@newssvr14.news.prodigy.net>
	<mailman.123.1187804723.32294.python-list@python.org>
Message-ID: <qb0zi.47332$Um6.34487@newssvr12.news.prodigy.net>

While that's an interesting link, I was thinking of the named items like:
  Numeric, (this one I know about.)
  Image
  ImageChops
  ImageTk
  time
  binascii
  tkMessageBox
  tkSimpleDialog

  ...
For example, what is the Image module? MakeQTE? ospath?

Robert Kern wrote:
> W. Watson wrote:
>> Is there a single source that explains these statements?
> 
> http://docs.python.org/tut/node8.html
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From floris.bruynooghe at gmail.com  Tue Aug 21 08:48:59 2007
From: floris.bruynooghe at gmail.com (Floris Bruynooghe)
Date: Tue, 21 Aug 2007 05:48:59 -0700
Subject: Module level descriptors or properties
Message-ID: <1187700539.312552.89340@w3g2000hsg.googlegroups.com>

Hi

When in a new-style class you can easily transform attributes into
descriptors using the property() builtin.  However there seems to be
no way to achieve something similar on the module level, i.e. if
there's a "version" attribute on the module, the only way to change
that to some computation later is by using a getter from the start as
your public API.  This seems ugly to me.

Does anyone know of a better way to handle this?


Regards
Floris



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Aug 11 17:35:50 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 11 Aug 2007 23:35:50 +0200
Subject: Who told str() to round my int()'s!!!
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
Message-ID: <5i6odmF3mr9f4U1@mid.individual.net>

Adam W. wrote:

> Why in the world does str() have any business rounding my numbers,

You are at the floating point numbers precision limit. Using str,
numbers are rounded to your machine's float precision in decimal
notation. Since floats are internally represented in binary
notation of constant precision, the decimal precision expressed in
number of places is not constant. Thus, safe rounding must be
applied to get consistent results.

> and how do I get around this?

If you don't want this (and thus introduce random deviations if you
assume greater precision than the number of places str gives you),
use repr. You've been warned.

>>> foonum = .0071299720384678782
>>> foonum
0.0071299720384678782
>>> str(foonum)
'0.00712997203847'
>>> repr(foonum)
'0.0071299720384678782'

Regards,


Bj?rn

-- 
BOFH excuse #5:

static from plastic slide rules



From bignose+hates-spam at benfinney.id.au  Fri Aug 10 06:05:45 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 10 Aug 2007 20:05:45 +1000
Subject: beginner whitespace question
References: <1186703261.136506.208660@x35g2000prf.googlegroups.com>
	<1186703525.591462.122140@m37g2000prh.googlegroups.com>
	<1186704161.334597.218750@z24g2000prh.googlegroups.com>
	<1186707164.095766.243480@q3g2000prf.googlegroups.com>
	<1186708404.901323.204730@g12g2000prg.googlegroups.com>
	<f9gf03$3al$1@daisy.noc.ucla.edu>
	<1186716319.025828.93780@g12g2000prg.googlegroups.com>
	<HQSui.32716$2v1.16515@newssvr14.news.prodigy.net>
Message-ID: <87tzr74scm.fsf@benfinney.id.au>

James Stroud <jstroud at mbi.ucla.edu> writes:

> When you want to screw your whitespace--don't!
> Take this little pledge and I know you won't:

James, you're a poet
And you don't even realise

-- 
 \      "[...] a Microsoft Certified System Engineer is to information |
  `\     technology as a McDonalds Certified Food Specialist is to the |
_o__)                               culinary arts." ?Michael Bacarella |
Ben Finney


From jgardner.jonathangardner.net at gmail.com  Thu Aug 16 21:28:34 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Fri, 17 Aug 2007 01:28:34 -0000
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
Message-ID: <1187314114.873306.187500@e9g2000prf.googlegroups.com>

On Aug 16, 3:35 pm, beginner <zyzhu2... at gmail.com> wrote:
>
> In perl it is just one line: $a=$b->{"A"} ||={}.
>

a = b.setdefault('A', {})

This combines all two actions together:
- Sets b['A'] to {} if it is not already defined
- Assigns b['A'] to a

More info on dict methods here:

http://docs.python.org/lib/typesmapping.html



From laurent.pointal at limsi.fr  Fri Aug 24 06:46:29 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 24 Aug 2007 12:46:29 +0200
Subject: How to minimize command window when running wxPython script
In-Reply-To: <1187951532.156581.25680@e9g2000prf.googlegroups.com>
References: <1187951532.156581.25680@e9g2000prf.googlegroups.com>
Message-ID: <famcu5$lfe$2@news2.u-psud.fr>

care02 at gmail.com a ?crit :
> Dear friends,
> 
> I have almost completed my first wxPython application. The only thing
> I need now is to minimize the command window. How is this accomplished
> on Win32? 

Use a .pyw main module (eventually a wrapper calling your main .py 
module) - it is associated with pythonw.exe, which dont open a console.
[note: this is in the FAQ]



From db3l.net at gmail.com  Thu Aug 30 17:07:40 2007
From: db3l.net at gmail.com (David Bolen)
Date: Thu, 30 Aug 2007 17:07:40 -0400
Subject: Unzip: Memory Error
References: <1188413939.834662.193180@y42g2000hsy.googlegroups.com>
	<m21wdmgkmh.fsf@valheru.db3l.homeip.net>
	<1188472431.290871.103720@o80g2000hse.googlegroups.com>
	<m2642wg6ze.fsf@valheru.db3l.homeip.net>
Message-ID: <m2fy20enoj.fsf@valheru.db3l.homeip.net>

David Bolen <db3l.net at gmail.com> writes:

> If you are going to read the file data incrementally from the zip file
> (which is what my other post provided) you'll prevent the huge memory
> allocations and risk of running out of resource, but would have to
> implement your own line ending support if you then needed to process
> that data in a line-by-line mode.  Not terribly hard, but more
> complicated than my prior sample which just returned raw data chunks.

Here's a small example of a ZipFile subclass (tested a bit this time)
that implements two generator methods:

read_generator      Yields raw data from the file
readline_generator  Yields "lines" from the file (per splitlines)

It also corrects my prior code posting which didn't really skip over
the file header properly (due to the variable sized name/extra
fields).  Needs Python 2.3+ for generator support (or 2.2 with
__future__ import)

Peak memory use is set "roughly" by the optional chunk parameter.
It's roughly since that's an uncompressed chunk so will grow in memory
during decompression.  And the readline generator adds further copies
for the data split into lines.

For your file processing by line, it could be used as in:

    zipf = ZipFileGen('somefile.zip')

    g = zipf.readline_generator('somefilename.txt')
    for line in g:
        dealwithline(line)

    zipf.close()

Even if not a perfect match, it should point you further in the right
direction.

-- David

          - - - - - - - - - - - - - - - - - - - - - - - - -

import zipfile
import zlib
import struct

class ZipFileGen(zipfile.ZipFile):

    def read_generator(self, name, chunk=65536):
        """Return a generator that yields file bytes for name incrementally.
        The optional chunk parameter controls the chunk size read from the
        underlying zip file.  For compressed files, the data length returned
        by the generator will be larger as the decompressed version of a chunk.

        Note that unlike read(), this method does not preserve the internal
        file pointer and should not be mixed with write operations.  Nor does
        it verify that the ZipFile is still opened and for reading.

        Multiple generators returned by this function are not designed to be
        used simultaneously (they do not re-seek the underlying file for
        each request."""

        zinfo = self.getinfo(name)
        compressed = (zinfo.compress_type == zipfile.ZIP_DEFLATED)
        if compressed:
            dc = zlib.decompressobj(-15)

        self.fp.seek(zinfo.header_offset)

        # Skip the file header (from zipfile.ZipFile.read())
        fheader = self.fp.read(30)
        if fheader[0:4] != zipfile.stringFileHeader:
            raise zipfile.BadZipfile, "Bad magic number for file header"

        fheader = struct.unpack(zipfile.structFileHeader, fheader)
        fname = self.fp.read(fheader[zipfile._FH_FILENAME_LENGTH])
        if fheader[zipfile._FH_EXTRA_FIELD_LENGTH]:
            self.fp.read(fheader[zipfile._FH_EXTRA_FIELD_LENGTH])

        # Process the file incrementally
        remain = zinfo.compress_size
        while remain:
            bytes = self.fp.read(min(remain, chunk))
            remain -= len(bytes)
            if compressed:
                bytes = dc.decompress(bytes)
            yield bytes

        if compressed:
            bytes = dc.decompress('Z') + dc.flush()
            if bytes:
                yield bytes


    def readline_generator(self, name, chunk=65536):
        """Return a generator that yields lines from a file within the zip
        incrementally.  Line ending detection based on splitlines(), and
        like file.readline(), the returned line does not include the line
        ending.  Efficiency not guaranteed if used with non-textual files.

        Uses a read_generator() generator to retrieve file data incrementally,
        so it inherits the limitations of that method as well, and the
        optional chunk parameter is passed to read_generator unchanged."""

        partial = ''
        g = self.read_generator(name, chunk=chunk)

        for bytes in g:
            # Break current chunk into lines
            lines = bytes.splitlines()

            # Add any prior partial line to first line
            if partial:
                lines[0] = partial + lines[0]

            # If the current chunk didn't happen to break on a line ending,
            # save the partial line for next time
            if bytes[-1] not in ('\n', '\r'):
                partial = lines.pop()

            # Then yield the lines we've identified so far
            for curline in lines:
                yield curline

        # Return any trailing data (if file didn't end in a line ending)
        if partial:
            yield partial


From ldo at geek-central.gen.new_zealand  Fri Aug 31 23:37:51 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 15:37:51 +1200
Subject: How to find out if the interpreter is a debug build?
References: <1188609417.273513.74450@i13g2000prf.googlegroups.com>
Message-ID: <fbamlq$r7q$6@lust.ihug.co.nz>

In message <1188609417.273513.74450 at i13g2000prf.googlegroups.com>, llothar
wrote:

> How can i find out if a selected python interpreter  (i only know the
> path name under which i should start it) is a debug build?

What's the difference in their behaviour?


From witham.ian at gmail.com  Wed Aug  1 18:46:16 2007
From: witham.ian at gmail.com (Ian Witham)
Date: Wed, 01 Aug 2007 22:46:16 -0000
Subject: Filemaker interactions
In-Reply-To: <mailman.1458.1186006469.22759.python-list@python.org>
References: <1186004514.108975.119380@e9g2000prf.googlegroups.com>
	<mailman.1458.1186006469.22759.python-list@python.org>
Message-ID: <1186008376.850181.237250@d30g2000prg.googlegroups.com>

On Aug 2, 10:13 am, Jay Loden <pyt... at jayloden.com> wrote:
> Ian Witham wrote:
> > Hello,
>
> > I'm hoping someone here can put me on the right track with some broad
> > concepts here.
>
> > What I am hoping to achieve is a simple HTML page to be served over
> > our company LAN, into which the users (Real Estate Agents) can enter a
> > property address or reference number.
>
> > My next thought was to have a Python CGI script query our filemaker
> > database of property listings, construct a PDF from the relevant
> > information, and finally return this PDF to the user.
>
> > At no stage do I want the user to have unfettered access to the
> > database or the ability to alter/delete records.
>
> > My question is: what is the most appropriate way for my script to
> > interact with Filemaker? Can this be done with Filemaker Pro 6?
>
> > According to the Filemaker Help, the "Local Data Access Companion"
> > shares the FileMaker Pro database with ODBC-compliant applications on
> > the same computer. Is this the right option?
>
> > Can my CGI script be an ODBC client? How? Would it need to be
> > Filemaker specific code or does ODBC have a standardised format?
>
> > I'm grateful for any advice and a nudge in the right direction.
>
> > Ian.
>
> I don't know if this helps, but there is a PyFileMaker module for Python for interacting with FileMaker:http://www.sourcefiles.org/Programming/Development/Modules/Python/PyF...
>
> That seems to be the only still working link to the module I can find, so I'm guessing it's not in active development.
>
> -Jay

Thanks for that. I've come across it before but never found a working
link!
I'll let you know how I get on.

Ian.



From http  Fri Aug 31 05:46:44 2007
From: http (Paul Rubin)
Date: 31 Aug 2007 02:46:44 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
Message-ID: <7xwsvcc9yz.fsf@ruckus.brouhaha.com>

aleax at mac.com (Alex Martelli) writes:
> Yeah, good question indeed, and I'm asking myself that -- somebody who
> posts to this group in order to attack the reliability of the language
> the group is about (and appears to be supremely ignorant about its use
> in air-traffic control and for high-reliability mission-critical
> applications such as Google's "Production Systems" software) might well
> be considered not worth responding to.  OTOH, you _did_ irritate me
> enough that I feel happier for venting in response;-)

Hi Alex, I'm a little confused: does Production Systems mean stuff
like the Google search engine, which (as you described further up in
your message) achieves its reliability at least partly by massive
redundancy and failover when something breaks?  In that case why is it
so important that the software be highly reliable?  Is a software
fault really worse than a hardware fault, especially if it's
permissible to sometimes let a transaction (like a search query) go
uncompleted (e.g. by displaying a "try again later" message)?  If you
get 1 billion queries in a month and a half dozen of them don't
complete (e.g. they give empty or incorrect results when there are
some good hits they should display) but the server is never actually
down, can you still claim 100% uptime?

There's a philosophy in Erlang described as "let it crash",
i.e. programmers are told NOT to program defensively such as by
checking inputs for validity.  Instead they should just rely on the
fault tolerance and process restart stuff to get things going again if
their process fails.  Similarly if the Google search software hits
some fatal condition once in a while, maybe it's enough to just treat
it as a crashed box and let the failover mechanisms handle the
problem.  Of course then there's a second level system to manage the
restarts that has to be very reliable, but it doesn't have to deal
with much weird concocted input the way that a public-facing internet
application has to.

Therefore I think Russ's point stands, that we're talking about a
different sort of reliability in these highly redundant systems, than
in the systems Russ is describing.


From newsreturns at biszumknie.de  Tue Aug 28 08:36:06 2007
From: newsreturns at biszumknie.de (Andreas Lobinger)
Date: Tue, 28 Aug 2007 14:36:06 +0200
Subject: expat error, help to debug?
In-Reply-To: <faug6k$pmo$1@daniel-new.mch.sbs.de>
References: <fak7q4$ahn$1@daniel-new.mch.sbs.de> <farjd8$51g$1@lust.ihug.co.nz>
	<faug6k$pmo$1@daniel-new.mch.sbs.de>
Message-ID: <fb14rp$s28$1@daniel-new.mch.sbs.de>

Aloha,

Andreas Lobinger wrote:
> Lawrence D'Oliveiro wrote:
>> In message <fak7q4$ahn$1 at daniel-new.mch.sbs.de>, Andreas Lobinger wrote:
>>> Anyone any idea where the error is produced?

... to share my findings with you:

     def ex(self,context,baseid,n1,n2):
         print "x",context,n1,n2
         return 1

The registered Handler has to return a (integer) value.
Would have been nice if this had been mentioned in the documentation.

Wishing a happy day,
		LOBI


From countblabula at yahoo.com  Mon Aug  6 02:50:24 2007
From: countblabula at yahoo.com (Lee Fleming)
Date: Sun, 05 Aug 2007 23:50:24 -0700
Subject: Something in the function tutorial confused me.
Message-ID: <1186383024.384152.87480@l70g2000hse.googlegroups.com>

Hello,
I have a simple question. Say you have the following function:

def f(x, y = []):
    y.append(x)
    return y

print f(23)  # prints [23]
print f(42)  # prints [23, 42]

As far as I understand, the default value y, an empty list, is created
when the def statement evaluates. With this thought in mind, the above
calls
to f make sense.

But this, the code that "fixes" the list accumulation confounds me:
def  f(x, y=None):
    if y is None: y = []
    y.append(x)
    return y

print f(23)  # prints [23]
print f(42)  # prints [42]

Why didn't the second call to f, f(42) return [23, 42]?
As I understand it, y is only None at the beginning of f(23).
Then y changes from None to 23. When f ends, doesn't y still have 23
in it,
just as it did in the first function I discussed?
And if y has 23 in it, won't the second call to f not execute what's
in the if statement?

In other words, what's going on here? How is it that y accumulates
argument values between function calls in the first function, but
doesn't in the second one?



From ricaraoz at gmail.com  Wed Aug 29 14:51:07 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Wed, 29 Aug 2007 15:51:07 -0300
Subject: copying files
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE30C@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE30C@efmailx>
Message-ID: <46D5C01B.7080202@bigfoot.com>

Brian McCann wrote:
> Hi,
>  
> with the code below I set a variable TEST_HOME to a path and the
> variable m to a path
> in my current dir.
> I have a symbolic link setting m---->lib
> when I run the script I get no errors and the lib dir with its 20 files
> does not get copied to /v01/test_home
> any help would be greatly appreciated
>  
> --Brian
> 
> #!/usr/bin/python
> import string
> import os
> import sys
> import errno
> import shutil
> import tarfile
>  
> TEST_HOME = "/v01/test_home"
> m = "./lib"
> os.system("cp -r m TEST_HOME")
> #os.system("tar -cvf viziant-ingestion.tar /v01/")
>  

Sorry, meant : os.system("cp -r " + m + " " + TEST_HOME)




From bscrivener42 at gmail.com  Wed Aug  8 12:14:48 2007
From: bscrivener42 at gmail.com (BartlebyScrivener)
Date: Wed, 08 Aug 2007 16:14:48 -0000
Subject: 'Advanced' list comprehension? query
In-Reply-To: <1186588812.006107.185570@o61g2000hsh.googlegroups.com>
References: <1186588812.006107.185570@o61g2000hsh.googlegroups.com>
Message-ID: <1186589688.673993.131930@q3g2000prf.googlegroups.com>

On Aug 8, 11:00 am, pyscottish... at hotmail.com wrote:
> Hi,
>
> I'm playing around with list comprehension, and I'm trying to find the
> most aesthetic way to do the following:
>
> I have two lists:
>
> noShowList = ['one', 'two', 'three']
>
> myList = ['item one', 'item four', 'three item']
>
> I want to show all the items from 'myList' that do not contain any of
> the strings in 'noShowList'.

I'm still learning these myself, but I think what you want is
itertools:

http://docs.python.org/lib/module-itertools.html




From gagsl-py2 at yahoo.com.ar  Sun Aug  5 05:50:06 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 05 Aug 2007 06:50:06 -0300
Subject: Best way to capture output from an exec'ed (or such) script?
References: <1186084086.212050.264270@q3g2000prf.googlegroups.com>
	<mailman.1547.1186097565.22759.python-list@python.org>
	<1186154066.529360.90260@q75g2000hsh.googlegroups.com>
	<1186264336.502429.232840@r34g2000hsd.googlegroups.com>
Message-ID: <op.twkyxsp2x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sat, 04 Aug 2007 18:52:16 -0300, gregpinero at gmail.com  
<gregpinero at gmail.com> escribi?:

>> On Aug 2, 7:32 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:>  
>> If your web server is multithreaded (or you use some other way to  
>> process
>> > many simultaneous requests) you have to be more careful - remember  
>> that
>> > sys.stdout is global, you must find a way to distinguish between  
>> output
>> >  from different processes all going into the same collector.
>
> I'm actually worried about this now.  Does anyone know of any
> potential solutions?  Anything to at least get me started?

You can use threading.currentThread() to distinguish between threads, and  
a Lock (or RLock) to ensure the output doesn't get mixed:

def write(msg):
     t = time.strftime("%x %X", time.localtime())
     who = threading.currentThread().getName()
     line = "%s (%-15.15s) %s\n" % (t, who, msg)
     OutputDebugString("%s (%-15.15s) %s\n" % (t, who, msg))
     loglock.acquire()
     try:
         with logfile() as f:
             f.write(line)
     finally:
         loglock.release()

-- 
Gabriel Genellina



From kcorbitt at api.com  Wed Aug 15 13:20:26 2007
From: kcorbitt at api.com (Corbitt, Kyle)
Date: Wed, 15 Aug 2007 10:20:26 -0700
Subject: Importing DLLs
Message-ID: <7603657D433B034AB667802696450A3EAA6161@MAIL2.api.com>

I'm running Linux with Python 2.3.  I have a C shared object file (*.so) and I need to be able to call its functions from within Python.  I have found a couple of Python modules that allow me to do this (dl, ctypes) but unfortunately I am only able to get them to return integers, even for function calls that I KNOW the library is supposed to return other types for.  I need the library to be able to return doubles, 2D arrays and hopefully strings as well.  I do have access to the C source code that the library was compiled from and can change it if necessary but I know even less about C than I do about Python so it'd be great if I could avoid that.
 
Keep in mind that I am a python newbie (I only have a few weeks' experience) so the more detailed you can make your response, the better.  Example code would be great.  I'm sure there's a way to do this but I've been  bashing my head against this problem for a couple days now and haven't made much progress.
 
Thanks,
Kyle
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From vodela.sai at gmail.com  Tue Aug  7 18:11:01 2007
From: vodela.sai at gmail.com (Rohan)
Date: Tue, 07 Aug 2007 22:11:01 -0000
Subject: Email
In-Reply-To: <1186194155.560881.183790@e16g2000pri.googlegroups.com>
References: <1186076005.729346.327140@z24g2000prh.googlegroups.com>
	<46b2393f$0$27409$ba4acef3@news.orange.fr>
	<1186159660.264082.91830@j4g2000prf.googlegroups.com>
	<1186194155.560881.183790@e16g2000pri.googlegroups.com>
Message-ID: <1186524661.611417.235280@e9g2000prf.googlegroups.com>

On Aug 3, 7:22 pm, SMERSH009 <SMERSH0... at gmail.com> wrote:
> On Aug 3, 9:47 am,Rohan<vodela.... at gmail.com> wrote:
>
>
>
> > On Aug 2, 1:06 pm, Laurent Pointal <laurent.poin... at wanadoo.fr> wrote:
>
> > >Rohanwrote:
> > > > I was wondering if there could be an arrangement where a file could be
> > > > attached and send as an email.
> > > > For ex
> > > > f = open(add.txt,w)
> > > > f.write('python')
> > > > f.close()
>
> > > > Now I would like to send an email with add.txt as an attachment, is it
> > > > possible ?
> > > > some one give me a pointer towards this.
>


> > > You can use iMailer as an example script to get parts:
>
> > >http://nojhan.free.fr/article.php3?id_article=22
>
> > > A+
>
> > > Laurent.
>
> > Laurent the link you gave me is in a language unknown to me if you
> > have anything that expalains in english, then let me know.
> > thanks
>
> Did you try Google translate?  Here is the tiny url of the page you
> wanted translatedhttp://tinyurl.com/3xlcmc

Thanks everyone,
I'm able to write a script which reads the file and puts it in the
message. I would like to attach the file is it possible?



From exarkun at divmod.com  Mon Aug  6 10:32:53 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 6 Aug 2007 10:32:53 -0400
Subject: Importing * From a Package
In-Reply-To: <e2a1d0aa0708060706p1f50d5c1j93b6cc3679522597@mail.gmail.com>
Message-ID: <20070806143253.4947.1097304571.divmod.quotient.19513@ohm>

On Mon, 6 Aug 2007 10:06:51 -0400, Patrick Doyle <wpdster at gmail.com> wrote:
>Reading through the Python tutorial, I got to section 6.4.1,
>"Importing * From a Package", which states:
>
>"If __all__ is not defined, the statement from Sound.Effects import *
>does not import all submodules from the package Sound.Effects into the
>current namespace; ..."
>
>It then goes on to state:
>
>"[It] imports whatever names are defined in the package [including]
>any submodules of the package that were explicitly loaded by previous
>import statements."
>
>I am curious to learn the rationale for this behavior, since it just
>caught me by surprise (hence the reason I was pouring over the
>tutorial document in such detail :-))

There's no reliable way to differentiate between names which you defined
using something other than an import statement, names you defined with an
import statement with the intent of publishing them as part of your external
API, and names you defined with an import statement which you only intended
to use internally.  So Python doesn't even try to differentiate betweem them.

>
>Thus far, everything in Python has seemed very intuitive to me,
>however the behavior of "from package import *" baffles me.
>
>So I figured I'd ask -- why does Python behave this way.
>
>(And now, I'm going to do some code cleanup :-))
>

You should probably remove all uses of "import *" from your code.  It's
only a very mild convenience at the time of initial use, and forever
after that it is a maintenance burden, causing anyone who wants to read
the code at any future point to have to dig through various layers of
definitions before they can find out what any particular name is bound
to, and potentially leading to bugs where names from one package accidentally
obscure names from another package.

Jean-Paul


From ptmcg at austin.rr.com  Mon Aug 27 20:06:31 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 27 Aug 2007 17:06:31 -0700
Subject: convert non-delimited to delimited
In-Reply-To: <1188237563.889663.228970@o80g2000hse.googlegroups.com>
References: <1188237563.889663.228970@o80g2000hse.googlegroups.com>
Message-ID: <1188259591.299171.253740@r29g2000hsg.googlegroups.com>

On Aug 27, 12:59 pm, RyanL <ryanlaurit... at gmail.com> wrote:
> I'm a newbie!  I have a non-delimited data file that I'd like to
> convert to delimited.
>
> Example...
> Line in non-delimited file:
> 0139725635999992000010100534+42050-102800FM-15+1198KAIA
>
> Should be:
> 0139,725635,99999,2000,01,01,00,53,4,+42050,-102800,FM-15,+1198,KAIA
>
> What is the best way to go about this?  I've looked all over for
> examples, help, suggestions, but have not found much.  CSV module
> doesn't seem to do exactly what I want.  Maybe I'm just missing
> something or not using the correct terminology in my searches.  Any
> assistance is greatly appreaciated!  Using Python 2.4

I'm guessing that these lines *aren't* fixed-length, especially those
signed integer fields.  I used the patented Paul McGuire CrystalBall
module to come up with this pyparsing rendition.  (OP may adjust to
suit.)

-- Paul

data = "0139725635999992000010100534+42050-102800FM-15+1198KAIA"
"""to be parsed as:
0139,725635,99999,2000,01,01,00,53,4,+42050,-102800,FM-15,+1198,KAIA"""

from pyparsing import *
import time
def convertTimeStamp(t):
    t["date"] = map(int,t.date)
    t["time"] = map(int,t.time)
    return time.strftime("%Y-%m-%dT%H:%M",
                          tuple(t.date)+tuple(t.time)+(0,0,0,0))

yearMonthDay = Word(nums,exact=4) + Word(nums,exact=2) +
Word(nums,exact=2)
hourMinuteSecond = Word(nums,exact=2) + Word(nums,exact=2)
timestamp = ( yearMonthDay("date") + hourMinuteSecond("time") )
timestamp.setParseAction(convertTimeStamp)
signedInteger = Word("+-",nums)

fieldA = Word(nums,exact=4)("A")
fieldB = Word(nums,exact=6)("B")
fieldC = Word(nums,exact=5)("C")
fieldD = timestamp("timestamp")
fieldE = Word(nums)("E")
fieldF = signedInteger("latitude").setParseAction(lambda t : int(t[0])/
1000.0)
fieldG = signedInteger("longitude").setParseAction(lambda t :
int(t[0])/1000.0)
fieldH = Combine(Word(alphas,exact=2) + "-" + Word(nums,exact=2))("H")
fieldI = signedInteger("I")
fieldJ = Word(alphas)("J")
dataFields = fieldA + fieldB + fieldC + fieldD + fieldE + \
    fieldF + fieldG + fieldH + fieldI + fieldJ

res = dataFields.parseString(data)
print res.dump()

prints:

['0139', '725635', '99999', '2000-01-01T00:53', '4',
42.049999999999997, -102.8, 'FM-15', '+1198', 'KAIA']
- A: 0139
- B: 725635
- C: 99999
- E: 4
- H: FM-15
- I: +1198
- J: KAIA
- latitude: 42.05
- longitude: -102.8
- timestamp: 2000-01-01T00:53



From evan at yelp.com  Thu Aug  2 01:15:36 2007
From: evan at yelp.com (Evan Klitzke)
Date: Wed, 1 Aug 2007 22:15:36 -0700
Subject: calling superclass __init__ when superclass is object
Message-ID: <cfb58d850708012215u24b8ce8aie7a02f99cd0d1137@mail.gmail.com>

Hi list,

I was reading this article: http://fuhm.net/super-harmful/ and didn't
understand the comment about calling super(Foo, self).__init__() when
Foo inherits only from object. Can someone on the list elaborate more
on why one should do this?

-- 
Evan Klitzke <evan at yelp.com>


From p.lavarre at ieee.org  Fri Aug 31 12:47:58 2007
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: Fri, 31 Aug 2007 09:47:58 -0700
Subject: platform system may be Windows or Microsoft since Vista
Message-ID: <1188578878.264671.296440@k79g2000hse.googlegroups.com>

Let's suppose you get Python for Vista Windows today from
http://www.python.org/download/.

Should you then conclude that the tests:

if platform.system() in ('Windows', 'Microsoft'):
if not (platform.system() in ('Windows', 'Microsoft')):

are now exactly what you should write for that 2.5.1 Python, when you
must resort to os-specific tools like DeviceIoControl, in place of the
slightly simpler tests that worked before:

if platform.system() == 'Windows': # Microsoft
if platform.system() != 'Windows': # Microsoft

?

Curiously yours, thanks in advance,

P.S. Groups search assures me clp hasn't previously reviewed: platform
system Windows Microsoft

P.P.S. I ask because this August I rediscovered this 28 May Python
uname vs. Win kernel32.getVersionEx issue indexed by Google as
follows:

http://mail.python.org/pipermail/patches/2007-June/022947.html
...
 
Patches item #1726668, was opened at 2007-05-28 03:23
 
On Microsoft Vista platform.system() returns 'Microsoft' and
platform.release() returns 'Windows'
 
Under Microsoft Windows XP SP2 platform.system() returns 'Windows' and
platform.release() returns 'XP'.
 
This is problem was caused by a change in the output of the "ver"
command. In Windows XP SP2 "ver" outputted 'Microsoft Windows XP
[Version 5.1.2600]'  In Microsoft Vista "ver" outputted 'Microsoft
Windows [Version 6.0.6000]'. The lack of the 3rd word before version
causes _syscmd_ver(...) in platform.py to return 'Microsoft' for
system instead of 'Microsoft Windows'. This causes uname() to return
the incorrect values. Both system() and release() call uname().

...



From greg at cosc.canterbury.ac.nz  Wed Aug  8 20:31:57 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Thu, 09 Aug 2007 12:31:57 +1200
Subject: Issues of state
In-Reply-To: <7x7io6dx3p.fsf@ruckus.brouhaha.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1680.1186416061.22759.python-list@python.org>
	<7x3aywr4tc.fsf@ruckus.brouhaha.com>
	<mailman.1684.1186422197.22759.python-list@python.org>
	<gg9mo4-p2m.ln1@lairds.us> <7x8x8mpn37.fsf@ruckus.brouhaha.com>
	<5htpcrF3lqmrnU1@mid.individual.net>
	<7x7io6dx3p.fsf@ruckus.brouhaha.com>
Message-ID: <5hv5r0F3m4v9cU1@mid.individual.net>

Paul Rubin wrote:
> The high bandwidth and persistence is not needed for an http
> connection, which just gets a form submission once in a while.

Bandwidth isn't really the main issue. The point is
that a lot of state is kept on both ends, making it
much easier to implement a rich user interface.

In fact, the more state is kept, the *less* bandwidth
you need, because communication can make use of shared
context to compress the messages.

--
Greg


From sjmachin at lexicon.net  Thu Aug  2 19:22:59 2007
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 02 Aug 2007 16:22:59 -0700
Subject: (no) fast boolean evaluation ?
In-Reply-To: <mailman.1545.1186095368.22759.python-list@python.org>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<mailman.1545.1186095368.22759.python-list@python.org>
Message-ID: <1186096979.397596.36640@e16g2000pri.googlegroups.com>

On Aug 3, 8:55 am, Ian Clark <icl... at mail.ewu.edu> wrote:
> Stef Mientki wrote:
> > hello,
>
> > I discovered that boolean evaluation in Python is done "fast"
> > (as soon as the condition is ok, the rest of the expression is ignored).
>
> > Is this standard behavior or is there a compiler switch to turn it on/off ?
>
> > thanks,
> > Stef Mientki
>
> It's called short circuit evaluation and as far as I know it's standard
> in most all languages. This only occurs if a conditional evaluates to
> True and the only other operators that still need to be evaluated are
> 'or's or the condition evaluates to False and all the other operators
> are 'and's. The reason is those other operators will never change the
> outcome: True or'd with any number of False's will still be True and
> False and'ed to any number of Trues will still be False.
>
> My question would be why would you *not* want this?
>
>

Why? Perhaps under some compound condition like this:

(you_are_confused and/or
function_returns_bool_but_has__side_effects())



From ricaraoz at gmail.com  Fri Aug 31 06:38:43 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Fri, 31 Aug 2007 07:38:43 -0300
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188537516.622167.115080@z24g2000prh.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>	<1188364909.397692.209170@q4g2000prc.googlegroups.com>	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>	<1188369928.755777.142690@i38g2000prf.googlegroups.com>	<46d75191$0$401$426a74cc@news.free.fr>	<1188518054.298017.90610@x35g2000prf.googlegroups.com>	<46d76595$0$4013$426a74cc@news.free.fr>	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>	<1188525647.003223.199620@q5g2000prf.googlegroups.com>	<mailman.181.1188527203.28954.python-list@python.org>
	<1188537516.622167.115080@z24g2000prh.googlegroups.com>
Message-ID: <46D7EFB3.1030203@bigfoot.com>

Russ wrote:
>> I've always wondered... Are the compilers (or interpreters), which take
>> these programs to machine code, also formally proven correct?
> 
> No, they are not formally proven correct (too complicated for that),
> but I believe they are certified to a higher level than your "typical"
> compiler. I think that Ada compilers used for certain safety-critical
> applications must meet higher standards than, say, GNU Ada, for
> example.
> 
> And the OS
>> in which those programs operate, are they also formally proven correct?
> 
> Same as above, if I am not mistaken.
> 
>> And the hardware, microprocessor, electric supply, etc. are they also
>> 'proven correct'?
> 
> I think the microprocessors used for flight control, for example, are
> certified to a higher level than standard microprocessors.
> 
> How would you prove a power supply to be "correct"? I'm sure they meet
> higher reliability standards too.
> 
> 

In that case why don't we just 'certify to a higher level' the programs
and get done with this formal proofs? We should remember that the level
of security of a 'System' is the same as the level of security of it's
weakest component, so either we formally prove all those other very
important components (OS gets MUCH more use than the program (the
program uses it for almost every other action)) or get done with the
whole fuss.




From joesox at gmail.com  Sun Aug 19 23:00:07 2007
From: joesox at gmail.com (JoeSox)
Date: Sun, 19 Aug 2007 20:00:07 -0700
Subject: How do I call anonymous classes from imported modules?
Message-ID: <785694cd0708192000y618ecd54xcd960730a9229f4c@mail.gmail.com>

I am importing 3rd party modules via a plugin script. I wish to
iterate thru the modules and call a common method like .do_foobar() or
something with all the imports.
But I can't figure out how to do something like below without knowing
the class name before hand.  Is there a builtin that helps call
classes anonymously?


(Calling example.do_foobar() works because I manually enter the classes' name)
>>> a=MyApp()
>>> sensorsList = []
>>> for snames in a.pluginsDict["sensorsplugins"]:
		sensorsList.append(__import__(snames))
>>> sensorsList[0].example.do_foobar()

but I need something like
>>> sensorsList[0][0].do_foobar()
because I will not know the plugin class names.

-- 
Later, Joe


From aleax at mac.com  Sat Aug 11 01:10:57 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 10 Aug 2007 22:10:57 -0700
Subject: Help with Dictionaries and Classes requested please.
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
	<87ejic6dkw.fsf@benfinney.id.au>
	<46bb19e2$0$9835$7b0f0fd3@mistral.news.newnet.co.uk>
	<59o*53SRr@news.chiark.greenend.org.uk>
Message-ID: <1i2nhi1.1ks27gfhzvw3vN%aleax@mac.com>

Sion Arrowsmith <siona at chiark.greenend.org.uk> wrote:

> special_dragonfly <Dominic at PLEASEASK.co.uk> wrote:
> >        if key in FieldsDictionary:
> >            FieldsDictionary[key].append(FieldClass(*line.split(",")))
> >        else:
> >            FieldsDictionary[key]=[FieldClass(*line.split(","))]
> 
> These four lines can be replaced by:
> 
> FieldsDictionary.setdefault(key, []).append(FieldClass(*line.split(",")))

Even better might be to let FieldsDictionary be an instance of
collections.defaultdict(list) [[assuming Python 2.5 is in use]], in
which case the simpler

   FieldsDictionary[key].append(FieldClass(*line.split(",")))

will Just Work.  setdefault was a valiant attempt at fixing this
problem, but defaultdict is better.


Alex


From gagsl-py2 at yahoo.com.ar  Mon Aug 20 04:39:36 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Aug 2007 05:39:36 -0300
Subject: swapping
References: <aa405c1f0708172258k7402e9b2ld44e24b093b5ea7b@mail.gmail.com>
Message-ID: <op.txcnoabfx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 18 Aug 2007 02:58:23 -0300, Beema shafreen  
<beema.shafreen at gmail.com> escribi?:

> result:
> klp5    bub1
>
> apn1    apn2
>
> but i have do the same for the revere ,to check the result like this for
> eg:
> apn2    apn1
> what is the concept to do this

I don't understand exactly what you want to do.
If you want to transform "apn1    apn2" into "apn2    apn1", try this:

col1, col2 = line.split()
print col2,"   ",col1

-- 
Gabriel Genellina



From fernandofariajunior at gmail.com  Thu Aug 30 17:21:14 2007
From: fernandofariajunior at gmail.com (fernando)
Date: Thu, 30 Aug 2007 21:21:14 -0000
Subject: Registering a python function in C
Message-ID: <1188508874.879215.319400@i13g2000prf.googlegroups.com>

Could someone post an example on how to register a python function as
a callback in a C function? It expects a pointer to PyObject... how do
I expose that? Basically, the signature of the function is
foo(PyObject* obj), where obj is the callback function... It's not
exactly extending or embedding, I've looked at those examples but they
don't really show how to do this...

Thanks for the help!



From hejibo at gmail.com  Tue Aug 28 12:55:42 2007
From: hejibo at gmail.com (He Jibo)
Date: Tue, 28 Aug 2007 16:55:42 -0000
Subject: help needed on PyLink
Message-ID: <1188320142.294269.316100@r29g2000hsg.googlegroups.com>

Hi, Everyone,

Is there anybody who know how to programming for eye-tracker with
PyLink? I just started learning it and need some help.  Your help will
be appreciated from the bottom of my heart.

My email is : hejibo at gmail.com, and my MSN is jibohepku at hotmail.com



From paul.heslop at blueyonder.co.uk  Wed Aug 15 10:38:35 2007
From: paul.heslop at blueyonder.co.uk (Paul Heslop)
Date: Wed, 15 Aug 2007 14:38:35 GMT
Subject: Free Air Conditioners!!!!!
References: <1187188126.751546.129520@w3g2000hsg.googlegroups.com>
Message-ID: <46C30FDE.B58264B9@blueyonder.co.uk>

Lepi Duja wrote:
> 
> Air conditioning
> 
posting this crap under different names doesn't make it any more on
topic or make it any more likely we'll follow the link

-- 
Paul  (We won't die of devotion)  
-------------------------------------------------------   
Stop and Look 
http://www.geocities.com/dreamst8me/


From naga86 at gmail.com  Thu Aug 23 00:39:20 2007
From: naga86 at gmail.com (Nagarajan)
Date: Wed, 22 Aug 2007 21:39:20 -0700
Subject: Server-side scripting in python
In-Reply-To: <0k2up4-lla.ln1@lairds.us>
References: <1187614732.519547.296020@j4g2000prf.googlegroups.com>
	<gi6rp4-mes.ln1@lairds.us>
	<1187755436.972359.293360@i13g2000prf.googlegroups.com>
	<0k2up4-lla.ln1@lairds.us>
Message-ID: <1187843960.922925.127990@i13g2000prf.googlegroups.com>

On Aug 22, 8:50 pm, cla... at lairds.us (Cameron Laird) wrote:
> In article <1187755436.972359.293... at i13g2000prf.googlegroups.com>,Nagarajan  <nag... at gmail.com> wrote:
>
> >>                         .
> >>                         .
> >>                         .
> >Let me phrase my problem in a finer way.
> >I have done simple projects inpython.
> >I wanted to explore web programming facet ofpython. The problem at my
> >hand is to develop an email web client. I've developed web
> >applications in PHP. I need to evaluatepython-based web frameworks to
> >make a smart choice of the web framework or a language like PHP, Perl
> >based on performance predominantly. Do I make myself clear now?
>
>                         .
>                         .
>                         .
> In general, network latency is likely to dominate the performance
> of a hobbyist-scale Webmail application coded in PHP, Perl, orPython; to base your decision predominantly on performance is ...
> well, it's not what I'd recommend.  You might as well flip a coin.
>
> Flipping a coin isn't such a bad idea; it's possible to write good
> applications with any of PHP, Perl, andPython.  Even if you restrict
> yourself toPython, you can flip another coin and choose almost any
> of its Web frameworks.
>
> I salute your intent to choose a Web framework wisely.  In the ab-
> sence of still more detail about your situation, requirements,
> constraints, ..., I don't know how to do so beyond what I've already
> written.

Django is intuitive and handy. I think I would go with that.
Any suggestions?

Thanks.



From http  Fri Aug 24 03:09:55 2007
From: http (Paul Rubin)
Date: 24 Aug 2007 00:09:55 -0700
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com>
	<87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com>
	<87tzqp77my.fsf@wilson.homeunix.com>
Message-ID: <7xy7g1if24.fsf@ruckus.brouhaha.com>

Torsten Bronger <bronger at physik.rwth-aachen.de> writes:
> The differences to LaTeX are explained comprehensively on the
> webpage, and actually LaTeX is the real competitor rather than
> reStructuredText.

TeX/LateX have been around forever and are well established standards,
as awful as they are.  Why do we want ANOTHER markup language?  We
need fewer, not more.


From fakeaddress at nowhere.org  Fri Aug 17 05:56:10 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 17 Aug 2007 09:56:10 GMT
Subject: python socket usage
In-Reply-To: <mailman.2048.1187254414.22759.python-list@python.org>
References: <mailman.2046.1187250159.22759.python-list@python.org>	<1187250839.541105.60900@r29g2000hsg.googlegroups.com>	<46C408D6.8000907@islandtraining.com>
	<mailman.2048.1187254414.22759.python-list@python.org>
Message-ID: <_gexi.33777$2v1.6997@newssvr14.news.prodigy.net>

O?uz Yar?mtepe wrote:
> As i read pickle module is Python-spesific. I need to talk with a Java 
> application and get the infortion that it will send. What i do right now is 
> listening a socket and reding the string that is sent by the java 
> application. So the java application is sending a string and i am reading and 
> parsing it and getting the related infortion i need. A more professional way 
> may be the reading the object itself. Is it possible to get the array for ex. 
> object that is sent from the Java application with sockets?

No. Sockets send and receive byte. Any transfer of higher-level
object values requires the sender to encode the values into bytes,
and the receiver to parse the bytes to construct an object; even
then the result is a value copy, not the object itself.

For many kinds of objects, there are libraries available to do
the encoding and parsing. If you need reference semantics, there
are "object request brokers".

Say more about your problem, and there's a good chance you'll
get more useful answers.


-- 
--Bryan


From ca.allen at gmail.com  Fri Aug  3 14:59:46 2007
From: ca.allen at gmail.com (Chris Allen)
Date: Fri, 03 Aug 2007 11:59:46 -0700
Subject: Global package variable, is it possible?
In-Reply-To: <1186166873.485756.290100@i13g2000prf.googlegroups.com>
References: <1186160415.065108.139160@e9g2000prf.googlegroups.com>
	<46b36b31$0$10622$4fafbaef@reader2.news.tin.it>
	<1186166873.485756.290100@i13g2000prf.googlegroups.com>
Message-ID: <1186167586.890782.298540@j4g2000prf.googlegroups.com>

> Hmm. So maybe something like this makes sense:
>
> __init__py:
> #######################
> _default_cfg_file = 'config.conf'
>
> import configure
> def loadcfg(filename):
>     configure.cfgfile = filename
>     try:
>         reload(pkg_module1)
>         reload(pkg_module2)
>     except NameError:
>         pass
> cfg = loadcfg(_default_cfg_file)
>
> import pkg_module1
> import pkg_module2
> # EOF
>
> confgure.py:
> #######################
> cfgfile = None
> def loadcfg()
>     global cfgfile
>     if not cfgfile:
>         return None
>     file = open(cfgfile)
>     cfg = SafeConfigParser()
>     cfg.readfp(file)
>     return cfg
> # EOF
>
> pkg_module1:
> #######################
> import configure
> cfg = configure.loadcfg()
> # EOF
>
> It's a little bit convoluted, but I think it solves most of my
> gripes.  Anybody have a better idea of how to do this?  Thanks again
> Fabio.

Ugh... I wasn't thinking... Of course this won't work either for the
same reasons above.  changing configure.cfgfile from __init__.py will
have no effect on the separate configure instances loaded in other
modules.  I still don't understand why python's __init__.py namespace
isn't global to all modules in the package.  Is this a feature, to
prevent sloppy code?  I think there are certain instances when it
would make sense.



From stephane at harobed.org  Sun Aug  5 17:43:21 2007
From: stephane at harobed.org (KLEIN Stephane)
Date: Sun, 5 Aug 2007 21:43:21 +0000 (UTC)
Subject: Question about pychecker and pylint
Message-ID: <f95g9p$b4i$1@sea.gmane.org>

Hi,

I wonder if pychecker projet is dead ? On pychecker home page
(http://pychecker.sourceforge.net/), last version date from February 3, 
2006 and
their mailist contain spam messages only.

Other tools like pychecker is pylint at
(http://www.logilab.org/project/eid/857). This is a great tools and it's 
still
active. However, it has issue : its web site, it is very incomprehensible.

Do you have other pylint web site ?

Thanks for your information.
Stephane



From cappy2112 at gmail.com  Sat Aug  4 16:20:35 2007
From: cappy2112 at gmail.com (Cappy2112)
Date: Sat, 04 Aug 2007 20:20:35 -0000
Subject: wxpython with python 2.5
In-Reply-To: <mailman.1518.1186072486.22759.python-list@python.org>
References: <4a7f84ac0708020924v73dee05eq76d10507e3c2cad5@mail.gmail.com>
	<mailman.1518.1186072486.22759.python-list@python.org>
Message-ID: <1186258835.749551.94100@q3g2000prf.googlegroups.com>

On Aug 2, 9:34 am, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/2/07, G <gggg.ii... at gmail.com> wrote:
> > Any help in getting wxpython to run in 2.5 would be greatly appreciated.
>

Have you tried posting a request for help on the wx list?



From ndbecker2 at gmail.com  Thu Aug  9 08:10:51 2007
From: ndbecker2 at gmail.com (Neal Becker)
Date: Thu, 09 Aug 2007 08:10:51 -0400
Subject: mmm-mode, python-mode and doctest-mode?
References: <46BAA8D6.1050402@gradient.cis.upenn.edu>
Message-ID: <f9f08l$9f3$1@sea.gmane.org>

Edward Loper wrote:

>> Anyone testing on xemacs?  I tried it, and C-c C-c sent xemacs into an
>> infinite loop (apparantly).
> 
> It works fine for me in XEmacs 21.4 (patch 17) (i386-debian-linux,
> Mule).  If you could answer a few questions, it might help me track down
> the problem:
> 
> - What version of xemacs are you running?
> - What version of doctest-mode are you running (0.4 or 0.5)?
> - Are you using doctest-mode by itself, or in combination with another
>    mode (via mmm-mode)?
> - Does pressing control-g (possibly repeatedly) cause it to become
>    unstuck?
> - Does it always freeze when you hit C-c C-c?  Or does it depend on the
>    contents of the buffer?  Does it freeze if you run it in an empty
>    buffer?
> 
> You could try changing the value of doctest-python-command, to see if
> that helps -- "M-x customize-variable doctest-python-command".  Set it
> to the full path to a Python interpreter.
> 
> Thanks,
> -Edward

Value: "21.5  (beta28) \"fuki\" XEmacs Lucid"

I tested with 'hello.py', which is attached.

Load hello.py.  M-x mmm-mode.  Then move cursor to the highlighted test
region (the triple quoted doctest).  C-h k C-c C-c says 'doctest-execute'. 
good.  Now C-c C-c sends xemacs into an infinite loop.

hello.py---------------
import math

'''
>>> print 2 + 2
4
'''

def _test():
    import doctest
    doctest.testmod()

if __name__ == "__main__":
    _test()




From daniels at dsl-only.net  Thu Aug 23 08:40:22 2007
From: daniels at dsl-only.net (Scott David Daniels)
Date: Thu, 23 Aug 2007 05:40:22 -0700
Subject: beginner, idiomatic python
In-Reply-To: <13cqlqbbpn0dmea@corp.supernews.com>
References: <13cqlqbbpn0dmea@corp.supernews.com>
Message-ID: <13cr00ujte4qs09@corp.supernews.com>

bambam wrote:
> Would someone like to suggest a replacement for this? It works ok,
> but it doesn't look like any of the other code:
> 
> tempList = ['1','2','3','4','5','6','7','8']
> sampleList=[]
> for port in tempList:
>     pagefound = False
>     for i in range(self.parent.GetPageCount()):
>         page=self.parent.GetPage(i)
>         if hasattr(page, "port"):
>             if page.port == int(port):
>                 pagefound=True
>         if not pagefound:
>             sampleList.append(port)
> 
> Thanks!
> 
> 
Look at good questions.  This is a _very_ underspecified question.

One stab at mindreading:

     def ported_pages(self):
         for i in range(self.parent.GetPageCount()):
             if hasattr(page, 'port'):
                 yield page

     ...
         tempList = ['1','2','3','4','5','6','7','8']
         missing = dict((int(v), v) for v in tempList)
         for page in self.ported_pages():
             if page.port in missing:
                 missing.pop(page.port)
                 if not missing:
                     break
         sampleList = missing.values()
     ...

-Scott David Daniels


From stefan.behnel-n05pAM at web.de  Fri Aug 17 12:13:24 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 17 Aug 2007 18:13:24 +0200
Subject: Can python threads take advantage of use dual core ?
In-Reply-To: <5ilvg4F3pqv6aU1@mid.uni-berlin.de>
References: <1187366443.621295.97020@e9g2000prf.googlegroups.com>
	<5ilvg4F3pqv6aU1@mid.uni-berlin.de>
Message-ID: <46c5c924$0$7688$9b4e6d93@newsspool2.arcor-online.net>

Diez B. Roggisch wrote:
> nikhilketkar schrieb:
>> What are the implications of the Global Interpreter Lock in Python ?
>> Does this mean that Python threads cannot exploit a dual core
>> processor and the only advantage of using threads is in that
>> computation and IO-bound operations can continue in parallel ?
> 
> 
> Essentially, yes. That is unless the computation is done in C-code which
> released the GIL beforehand.

Which virtually all computation-intensive extensions do. Also, note the
processing package, which allows you to use a separate process more or less
like a thread, thus avoiding GIL issues completely.

Stefan


From koje_je_ono_bilo_pitanje at bla.bla  Tue Aug 28 14:47:27 2007
From: koje_je_ono_bilo_pitanje at bla.bla (Boris Ozegovic)
Date: Tue, 28 Aug 2007 20:47:27 +0200
Subject: localhost, ?!
References: <fb1id4$kpp$1@localhost.localdomain>
	<46d46d38$0$37200$4fafbaef@reader3.news.tin.it>
Message-ID: <fb1qjh$lce$1@localhost.localdomain>

Fabio Z Tessitore wrote:

> I think to have http://localhost working you need a web server (like 
> apache). maybe you have it at your home.

I do have Apache.  You can see that urllib, older module, works correctly.


From horpner at yahoo.com  Tue Aug 14 09:32:40 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 14 Aug 2007 13:32:40 GMT
Subject: LEGB rule, totally confused ...
References: <mailman.1959.1187094797.22759.python-list@python.org>
Message-ID: <slrnfc3bug.n4.horpner@FIAD06.norwich.edu>

On 2007-08-14, stef mientki <stef.mientki at gmail.com> wrote:
> I've thought many times I finally understood the import /
> namespace rules, but again I'm totally lost :-(
>
> This is my library file
>
>     # Module lib_test.py
>
>     X = 1
>
>     def Init():
>         global X
>         X = 3
>         print 'Init', X
>
>     def Run ():
>         print X                 <=== UnboundLocalError: local variable
>     'X' referenced before assignment
>         X = X + 1
>         print ' Run', X

>From _Python Language Reference Manual_ see: '4.1 Naming and
Binding' and '6.13 The global statement'.

  If a name is bound [assigned] in a block, it is a local
  variable of that block.

  ...

  The global statement is a declaration which holds for the
  entire current code block. It means that the listed identifiers
  are to be interpreted as globals. It would be impossible to
  assign to a global variable without global, although free
  variables may refer to globals without being declared global. 

Since your Init and Run functions both assign (bind) a value to
X, X is assumed to be a local variable unless you say otherwise
with a global statement.

Note that the global statement in Init applies only in Init's
code block. Run must have it's own 'global X' statement, if
applicable.

-- 
Neil Cerutti


From michael at jedimindworks.com  Mon Aug 20 02:14:08 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sun, 19 Aug 2007 23:14:08 -0700
Subject: popen4 not returning output
In-Reply-To: <1187582318.054450.76960@z24g2000prh.googlegroups.com>
References: <1187582318.054450.76960@z24g2000prh.googlegroups.com>
Message-ID: <E9AAAA02-F137-4CE4-B0A5-02FB9DF92CF1@jedimindworks.com>


On Aug 19, 2007, at 8:58 PM, hortitude at gmail.com wrote:

> I am trying to run the following script:
>
>
> #!/usr/bin/python
>
> import popen2
>
> commandToRun = """scp scp_trial.py user at host:/targetDirectory"""
> #commandToRun = "ls"
> print commandToRun
> p_out, p_in = popen2.popen4 (commandToRun)
>
> theOut = p_out.readlines ()
> print theOut
>
>
> When I run this command with the "ls" command I see the output.
> When I run this with the scp command I do not see the output of my
> command -- however the file is successfully transfered.  How can I see
> the output?
>

scp will not produce output on stdout or stderr if stdout/stderr is  
redirected.  I assume it uses an ioctl with TCGETA to determine the  
terminal characteristics of the device connected to stdout, and get  
either an EINVAL (for a pipe) or ENOTTY (for a file) failure when no  
terminal is attached.

You can test whether it works the same on your system by running your  
scp from the command line and redirecting the output:

scp scp_trial.py user at host:/targetDirectory >scp.stdout 2>scp.stderr

Both files will exist (the shell does this before starting the scp  
command), but will (I think) be empty.

hope this helps,
Michael

---
The Rules of Optimization are simple.
Rule 1: Don't do it.
Rule 2 (for experts only): Don't do it yet.
                                  -Michael A. Jackson




From miki.tebeka at gmail.com  Sat Aug  4 02:04:38 2007
From: miki.tebeka at gmail.com (Miki)
Date: Sat, 04 Aug 2007 06:04:38 -0000
Subject: Website data-mining.
In-Reply-To: <mailman.1603.1186196436.22759.python-list@python.org>
References: <mailman.1603.1186196436.22759.python-list@python.org>
Message-ID: <1186207478.055593.107110@z24g2000prh.googlegroups.com>

Hello,

> I'm using Python for the first time to make a plug-in for Firefox.
> The goal of this plug-in is to take the source code from a website
> and use the metadata and body text for different kinds of analysis.
> My question is: How can I retrieve data from a website? I'm not even
> sure if this is possible through Python. Any help?
Have a look at http://www.myinterestingfiles.com/2007/03/playboy-germany-ads.html
for getting the data and at http://www.crummy.com/software/BeautifulSoup/
for handling it.

HTH.

--
Miki Tebeka <miki.tebeka at gmail.com>
http://pythonwise.blogspot.com



From tamim.shahriar at gmail.com  Thu Aug 23 12:56:35 2007
From: tamim.shahriar at gmail.com (subeen)
Date: Thu, 23 Aug 2007 16:56:35 -0000
Subject: C# and Python
In-Reply-To: <46cac5ba$1_1@news.chariot.net.au>
References: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
	<46cac5ba$1_1@news.chariot.net.au>
Message-ID: <1187888195.101930.101050@r23g2000prd.googlegroups.com>

On Aug 21, 5:00 pm, Bikal KC <nepbabucxspamf... at yahoo.ca> wrote:
> subeenwrote:
> > When the user clicks Quick Sort button, the quicksort.py will be
> > called and it will sort the numbers.
>
> One way to do this:
> In your C# app, have the mouse click event handler call python
> interpreter "/path/to/python /path/to/quicksort.py". Make quicksort.py
> write to a file the result. After the quicksort.py finishes, read the
> file from your normal C# app.
>
> Cheers.

Hi, what's the C# function to call python interpreter?

regards,
Subeen.



From robert.kern at gmail.com  Wed Aug 22 16:46:34 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 22 Aug 2007 15:46:34 -0500
Subject: What Are These Import/From Statements about?
In-Reply-To: <qb0zi.47332$Um6.34487@newssvr12.news.prodigy.net>
References: <un_yi.34471$2v1.24183@newssvr14.news.prodigy.net>	<mailman.123.1187804723.32294.python-list@python.org>
	<qb0zi.47332$Um6.34487@newssvr12.news.prodigy.net>
Message-ID: <fai7bd$jlu$1@sea.gmane.org>

W. Watson wrote:
> While that's an interesting link, I was thinking of the named items like:

Okay, sorry.

>   Numeric, (this one I know about.)
>   Image
>   ImageChops
>   ImageTk

The Image* modules are from PIL.
http://www.pythonware.com/products/pil/

>   time

http://docs.python.org/lib/module-time.html

>   binascii

http://docs.python.org/lib/module-binascii.html

>   tkMessageBox
>   tkSimpleDialog

These are also from the standard library. See your lib-tk/ directory.
http://effbot.org/tkinterbook/tkinter-standard-dialogs.htm
http://effbot.org/tkinterbook/tkinter-dialog-windows.htm

>   ...
> For example, what is the Image module? MakeQTE?

MakeQTE is new to me. Google only brings up this thread.

> ospath?

os.path. It's a sub-module of the standard os module.
http://docs.python.org/lib/module-os.path.html

socket, struct, glob, bisect, and datetime are standard library modules.
http://docs.python.org/modindex.html

-- 
Robert Kern

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



From __peter__ at web.de  Thu Aug 23 07:57:30 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 23 Aug 2007 13:57:30 +0200
Subject: sentance containg the string or symbol =?UTF-8?B?zqk=?=
References: <1187868007.012689.224290@z24g2000prh.googlegroups.com>
	<fajrcf$euu$03$1@news.t-online.com>
Message-ID: <fajsnb$ib1$03$1@news.t-online.com>

Oops, forgot to switch the encoding to utf-8.

>>> print u"? and also \N{GREEK CAPITAL LETTER LAMDA}"
? and also ?

Peter



From fabioztessitore at libero.it  Wed Aug 15 13:56:42 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 15 Aug 2007 17:56:42 GMT
Subject: All names in the current module
References: <87d4xowymq.fsf@wilson.homeunix.com>
	<1i2whvw.1qje42i1bh18bkN%raims@dot.com>
Message-ID: <46c33e5a$0$36450$4fafbaef@reader5.news.tin.it>

Il Wed, 15 Aug 2007 19:01:17 +0200, Lawrence Oluyede ha scritto:

> Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
>> How can I get a list with all classes defined in the current module?
>> Thank you!
> 
> rhymes at groove ~ % cat > t.py
> class A: pass
> 
> rhymes at groove ~ % python
> Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04) [GCC 4.0.1 (Apple
> Computer, Inc. build 5367)] on darwin Type "help", "copyright",
> "credits" or "license" for more information.
>>>> import t
>>>> print dir(t)
> ['A', '__builtins__', '__doc__', '__file__', '__name__']
> 
> Now you have the list of names. To find out if they are actual classes
> or not you can do this:


to get names' list you can simply call globals()

bye


From db3l.net at gmail.com  Thu Aug 30 15:43:41 2007
From: db3l.net at gmail.com (David Bolen)
Date: Thu, 30 Aug 2007 15:43:41 -0400
Subject: Creating a multi-tier client/server application
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
	<7xy7ft4fqg.fsf@ruckus.brouhaha.com>
	<1188479584.073309.297770@x40g2000prg.googlegroups.com>
	<1188498543.184255.213940@i13g2000prf.googlegroups.com>
Message-ID: <m21wdkg64y.fsf@valheru.db3l.homeip.net>

Jeff <jeff.fw at gmail.com> writes:

> David: Sounds like a pretty interesting app.  Thanks for the in-depth
> description.  I went and checked out Twisted PB, and it seems
> awesome.  I may very well go with that.  How was writing code with
> it?  I may also end up using py2app, but I'm also going to have to
> support Windows, (p2exe, then), and possibly Linux.  Well, maybe not
> Linux, but I'll probably be doing most of the development in Linux, so
> I guess that counts.

I find PB very easy, but it's important to first become familiar with
Twisted (in particular Deferred's), which can have a steep, but worth
it IMO, learning curve.  PB is a thin, transparent system, so it
doesn't try to hide the fact that you are working remotely.  Being
thin, there also isn't very much to have to learn.

For packaging, you don't have to use a single system if you are
multi-platform.  Your codebase can be common, and just have separate
setup files using py2app on OS X and py2exe on Windows.  A makefile or
equivalent can handle final distribution packaging (e.g,. hdiutil for
dmg on OS X, Inno Setup, NSIS, etc... on Windows).  You'll spend some
platform-specific time getting the initial stuff setup, but then new
builds should be easy.

For Linux, depending on the level of your users you can either just
directly ship something like eggs (generated through a setup) or look
into pyInstaller, which was the old Installer package that also
supports single-exe generation for Linux.  pyInstaller also does
Windows, so if you have to support them both you could try using
pyInstaller rather than both it and py2exe.

But if you're just developing in Linux, final packaging probably isn't
very important.

-- David


From avishorp at yahoo.com  Tue Aug 21 18:09:26 2007
From: avishorp at yahoo.com (avishay)
Date: Tue, 21 Aug 2007 15:09:26 -0700
Subject: Chaining programs with pipe
Message-ID: <1187734166.384152.178040@o80g2000hse.googlegroups.com>

Hello
I'm trying to chain two programs with a pipe (the output of one
feeding the input of the other). I managed to capture the output and
feeding the input of each program independently with popen, but how do
I tie them together? Is there a solution that works equally on all
platforms?

Thanks,
Avishay



From grante at visi.com  Fri Aug 24 10:37:28 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 24 Aug 2007 14:37:28 -0000
Subject: Socket recv(1) seems to block instead of returning end of file.
References: <mailman.164.1187862959.32294.python-list@python.org>
	<13cr4u8mimniub4@corp.supernews.com>
	<Y2tzi.30236$RX.18701@newssvr11.news.prodigy.net>
Message-ID: <13ctr98fjaobva8@corp.supernews.com>

On 2007-08-24, Bryan Olson <fakeaddress at nowhere.org> wrote:
> Grant Edwards wrote:
> [...]
>> import socket,random
>> 
>> HOST = ''                 # Symbolic name meaning the local host
>> PORT = 8765               # Arbitrary non-privileged port
>> s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>> s.connect((HOST, PORT))
>
> Actually the empty string passed for the host means INADDR_ANY,

You're correct.  I copied that code from the server example on
the Python socket module doc page, and forgot to change the host.

  http://docs.python.org/lib/socket-example.html

> which does not really make sense for the client. On my Win-XP
> system, the client fails with
>
>    socket.error: (10049, "Can't assign requested address")

It's interesting that it works on Linux.

> For the loop-back adapter, 'localhost' or '127.0.0.1' should
> work.

Yup.

-- 
Grant Edwards                   grante             Yow! YOU PICKED KARL
                                  at               MALDEN'S NOSE!!
                               visi.com            


From steveo at syslang.net  Wed Aug 22 13:54:01 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Wed, 22 Aug 2007 13:54:01 -0400 (EDT)
Subject: Problems with dynamic function creation.
Message-ID: <alpine.LFD.0.999.0708220959100.5422@saturn.syslang.net>

I have some functions I need to create at runtime. The way I'm creating 
them is by calling a function which returns the string representation. 
Then I exec the string.

Here's the code I use to gen the strings:
mkfactfns.py
-----------
import new
def mkfactfns( cname ):
     def auxgen( name, params, dd ):
         v1 = ( """def mk%s%sdict(%s):\n"""%(name, cname, params)
                +
                """    print 'In mk%s%sdict'\n"""%(name, cname)
                +
                """    return %s\n"""%dd)
         v2 = ( """def mk%s%s(%s):\n"""%(name,cname,params)
                +
                """    print 'Calling mk%s%s'\n"""%(name,cname)
                +
                """    return %s%s( mk%s%sdict(%s) )\n"""%(name,cname, 
name, cname, params))
         return v1, v2
     return auxgen

This is  the caller of mkfactfns
--------------------------------
import mkfactfns
fbase = "ABC"   # Factory BASEname
auxfactgen = mkfactfns.mkfactfns(fbase)

Then in the same module, I call auxfactgen
via
     mkfactfns.AuxFnDefs( auxfndata, auxfactgen, globals(), "ABC" )

def AuxFnDefs(auxfndata, fnmaker, globs, cname ):
     dictsuff = ('dict','')
     for ii in auxfndata:
         rr = fnmaker( *ii )
         for jj in range( 2 ):
             co = compile (rr[jj], '', 'exec')
             exec co
             name = 'mk%s%s%s'%(ii[0],cname,dictsuff[jj])
             print 'co = ', co, 'name = ', name
             nfunc = new.function( co, globs, name )
             print 'Just added mk%s%s%s'%(ii[0],cname,dictsuff[jj])
             globs['mk%s%s%s'%(ii[0],cname,dictsuff[jj])] = nfunc
             print 'g = ', globs['mk%s%s%s'%(ii[0],cname,dictsuff[jj])]

Everything works just fine (that I know of) except that when I run a 
function that takes 1 arg, I get the following message:

TypeError: ?() takes no arguments (1 given)

even though I know that I am passing one arg. I must be doing something 
wrong, I just don't know what. :-(

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From gggg.iiiii at gmail.com  Thu Aug  2 12:24:53 2007
From: gggg.iiiii at gmail.com (G)
Date: Thu, 2 Aug 2007 12:24:53 -0400
Subject: wxpython with python 2.5
Message-ID: <4a7f84ac0708020924v73dee05eq76d10507e3c2cad5@mail.gmail.com>

Hello,


     I am trying to get wxpython to run with python 2.5 without any success.
wx works prefectly in python 2.4. below is the error code i get when i try
to run the code.
File "demo.py", line 3, in <module>
    import Main
  File "/tmp/wxPython/Main.py", line 32, in <module>
    import wx                  # This module uses the new wx namespace
ImportError: No module named wx

Any help in getting wxpython to run in 2.5 would be greatly appreciated.
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From vodela.sai at gmail.com  Sun Aug 12 22:05:51 2007
From: vodela.sai at gmail.com (Rohan)
Date: Mon, 13 Aug 2007 02:05:51 -0000
Subject: Colored text
Message-ID: <1186970751.435970.189900@q3g2000prf.googlegroups.com>

Hello,
Can some one tell me how do I get colored text. Say when I want to
write something in a text file , how do I get it colored.



From tjreedy at udel.edu  Mon Aug 20 23:37:00 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 20 Aug 2007 23:37:00 -0400
Subject: GeneratorExit should derive from BaseException, not Exception
References: <46CA0EFE.6020103@imvu.com>
Message-ID: <fadmm2$m3k$1@sea.gmane.org>


"Chad Austin" <chad at imvu.com> wrote in message 
news:46CA0EFE.6020103 at imvu.com...
|| try:
| result = yield chatGateway.checkForInvite({'userId': userId})
| logger.info('checkForInvite2 returned %s', result)

would not
except GeneratorExit: <do whatever>
solve your problem?

| except Exception:

Such catchalls are known to be prone to catch too much
and are therefore not encouraged ;-).
As in 'use at your own risk'.
Guido encourages specific catches just for the reasons you give here.

| logger.exception('checkForInvite2 failed')
| result = None
| # ...
| yield Sleep(10)
|
| This is real code that I wrote in the last week.  The key portion is the
| try: except:  Basically, there are many reasons the checkForInvite2 call
| can fail.  Maybe a socket.error (connection timeout), maybe some kind of
| httplib error, maybe an xmlrpclib.ProtocolError...  I actually don't
| care how it fails.  If it fails at all, then sleep for a while and try
| again.  All fine and good.
...
| So, my proposal is that GeneratorExit derive from BaseException instead
| of Exception.
|
| p.s. Should I have sent this mail to python-dev directly?  Does what I'm
| saying make sense?  Does this kind of thing need a PEP?

There was a *long* discussion of the current 2.5 exception hierarchy on 
pydev.  Search either python.org's or gmane's archive if you want to pursue 
this.  But I expect the people involved would say much the same as above.

Terry Jan Reedy






From arkanes at gmail.com  Wed Aug  8 10:09:46 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 8 Aug 2007 09:09:46 -0500
Subject: twisted - locking threads when deferToThread is used
In-Reply-To: <46B99CCB.1070304@iptel.org>
References: <46B99CCB.1070304@iptel.org>
Message-ID: <4866bea60708080709v797c5a67w158f6f988ef5c304@mail.gmail.com>

On 8/8/07, Ladislav Andel <ladaan at iptel.org> wrote:
> Hi,
> I'm writing an application which will be periodically testing servers.
> I will have a global list of these servers(domain names) and need to do
> few tasks.
> 1) DNS checks - I will use asynchronous twisted-names for it
> - in case there is a difference comparing to the list it should update
> the list(then also in DB)
> 2) ICMP pings - should be also possible to do it asynchronously
> 3) Blocking function which will be pinging with SIP requests
> - here I will use function deferToThread to make it non-blocking.
>
> Questions:
> 1) How do I lock each thread when writing to a global list in twisted?
> 2) How will I put together all three results mentioned above in the
> global list
> - is it by using function callLater ?
> 3) Could you help me with a rough skeleton of this application, please?
>
> Thank you,
> Lada
>


deferToThread returns the result of the passed function in a Deferred.
Callbacks and errbacks will be run in the main event loop, so you
don't need to worry about thread safety of the callbacks, just of the
function itself.

The basic model would look something like this:

def querySIP(what):
    return sip.query(what) #native, *threadsafe*, blocking call

sipquery = reactor.deferToThread(querySIP, what)
sipquery.addCallback(lambda result: sip_results.append(result))
sipquery.addErrback(log.err)


From chris at shenton.org  Thu Aug 23 14:58:16 2007
From: chris at shenton.org (Chris Shenton)
Date: Thu, 23 Aug 2007 14:58:16 -0400
Subject: python setup.py: how to override a setup.cfg value ?
Message-ID: <86odgyxelz.fsf@PECTOPAH.shenton.org>

I'm building python-ldap and need to change values of library and
include paths that are in the setup.cfg file.  This is an automated
build (using "buildit") so I'd prefer not to have edit the .cfg by hand,
with sed, or even with buildit's Substitute().

I'd like to be able to do something like I'd do with "make", specify a
value on the command line like:

  make -Dprefix=/usr/local

or in this case

  python setup.py -Dlibs="ldap lber" build   [Does NOT work]

I cannot see how to do this from the --help or from googling.  
The closest I've gotten is to do:

  python setup.py setopt --command=_ldap --option=libs --set-value="ldap lber"

but that overwrites the python.cfg, a bit rude it seems to me. 

Am I missing something? is there a way to override a .cfg value on the
command line while running a setup.py command like "build" or "install"?

Thanks.


From patelkundan at gmail.com  Sat Aug  4 08:19:46 2007
From: patelkundan at gmail.com (Sonu)
Date: Sat, 04 Aug 2007 05:19:46 -0700
Subject: how to run os.execv() to run command pslq dbname < gen.command
Message-ID: <1186229986.707259.323130@19g2000hsx.googlegroups.com>

hello all ,
i need to run psql from my py file,,
for that i am using : os.execv(path for psql ,['psql dbname <
gen.command'])
but its not working ..........

the  command wht i want to run from this py file is :>>>psql dbname <
gen.command

where gen.command file contain some command to create csv file from
database

\o temp.csv
\a
\f ,
select * from temp

if u have any idea plz help me,,



From deets at nospam.web.de  Thu Aug 16 12:25:18 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 16 Aug 2007 18:25:18 +0200
Subject: Who told str() to round my int()'s!!!
In-Reply-To: <zd_wi.14608$eY.8264@newssvr13.news.prodigy.net>
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
	<9qmvi.47364$s5.1537219@phobos.telenet-ops.be>
	<mailman.1857.1186861157.22759.python-list@python.org>
	<3ZudnUuJ68lcxl7bnZ2dnUVZ_t_inZ2d@comcast.com>
	<slrnfc7sot.1aa.hat@se-162.se.wtb.tue.nl>
	<zd_wi.14608$eY.8264@newssvr13.news.prodigy.net>
Message-ID: <5ijc3lF3ne7ddU1@mid.uni-berlin.de>

John Nagle schrieb:
> A.T.Hofkamp wrote:
>> On 2007-08-15, Larry Bates <larry.bates at websafe.com> wrote:
>>
>>> or the mildy
>>> amusing "how do I write bytes not characters to a file" questions at 
>>> least once
>>> a week on this forum.
> 
>    Actually, that's a reasonable question, and one that Python didn't do
> quite right.
> 
>    Remember, in the beginning, Python had only ASCII strings, which
> were equivalent to arrays of bytes.  Then came Unicode strings.  Then
> came the restriction of ASCII chars to 0..127.  Except that you can
> still store binary bytes in ASCII strings, subject to some limitations.

Sorry, but that's bogus. Python had byte-strings from the beginning. 
Nothing to do with ASCII. Which is an encoding-standard that has ALWAYS 
been limited to the numbers 0..127.

All that changed was the introduction of unicode-objects and due to the 
fact that these need to be serialized to/from bytestrings the 
introduction of ASCII as default-encoding.

So no "still storing" or anything such.

Diez


From spam at chezmarshall.freeserve.co.uk  Wed Aug 29 12:49:05 2007
From: spam at chezmarshall.freeserve.co.uk (Robert Marshall)
Date: Wed, 29 Aug 2007 16:49:05 GMT
Subject: Gmane's been quiet ...
References: <mailman.88.1188343014.28954.python-list@python.org>
	<1i3l2k9.1j3tdgr1iz19yeN%raims@dot.com>
	<13d9l0f1i2erdc6@corp.supernews.com>
	<1i3lsqu.10ti61g1fs47osN%raims@dot.com>
	<mailman.97.1188384559.28954.python-list@python.org>
Message-ID: <m1lkbu2t0w.fsf@chezmarshall.freeserve.co.uk>

On Wed, 29 Aug 2007, Steve Holden wrote:

> 
> Lawrence Oluyede wrote:
>> Grant Edwards <grante at visi.com> wrote:
>>> Posting that were made to mailing lists via gmane?
>>
>> That, I do not know
>>
> Given that I have now read a reply to my post-via-gmane on gmane
> before seeing the original post appear there I shall assume they've
> been having some sort of issue.
> 

See http://news.gmane.org/gmane.discuss for some discussion of this...

Robert
-- 
La grenouille songe..dans son ch?teau d'eau
Links and things http://rmstar.blogspot.com/


From david at nospam.spam  Mon Aug 13 20:52:59 2007
From: david at nospam.spam (david)
Date: Tue, 14 Aug 2007 10:52:59 +1000
Subject: wxPython before MainLoop
In-Reply-To: <5i3b1jF3n5bdtU1@mid.individual.net>
References: <13bl9a75laqcm70@corp.supernews.com>
	<13bnh5bs4b9h427@corp.supernews.com>
	<5i3b1jF3n5bdtU1@mid.individual.net>
Message-ID: <13c1v79hs0dob3@corp.supernews.com>

Well yes, I have tried this app with native windows,
and I know how to do it.

But if all wxPython can offer is a poor imitation
of MFC, I'm better off using MFC aren't I?

And too all those people who wrote back to insist
that users MUST explicitly build a multi-threaded
framework for wxPython:

It's supposed to already be a framework :~)

(david)



Bjoern Schliessmann wrote:
> [david] wrote:
> 
>> I'm disappointed that I didn't get a wxPython solution.
>>
>> If the only way to get wxPython to correctly handle
>> this simple task is to code around it, 
> 
> LOL -- did you try coding this app with native windows means, like
> MFC? You will have *exactly* the same problem, and *exactly* for
> the same reason. The organisation of wxWidgets (and thus, wxPython)
> is very near to Windows GUI coding philosophy.
> 
>> I don't think wxPython is really ready for Windows.
> 
> I suggest you first went getting experience with other GUI libraries
> before you make such statements. 
> 
> Also, wxPython is a thin wrapper around wxWidgets C++ library which
> is widely used for Windows apps. And with wxWidgets, you'd *also*
> have the same problem.
> 
>> Bjoern, you're wrong. The GUI needs to be displayed
>> for the user to analyse. A delay between display and
>> readiness is much better than a delay before display
>> or a delay with the GUI half-drawn.
> 
> This may be, but it strongly depends on the application itself.
>  
>> Mike, the screen does display correctly, it's just
>> that in Windows, screen updates are not processed
>> while the application is busy.
> 
> That's the matter in just about *every* GUI framework using an event
> loop. And I don't know any that doesn't. Thus, there are two widely
> used standard solutions:
> 
> * use a worker thread, or
> 
> * call a "process all pending events now" function repeatedly during
>   the work (here: wx.Yield, wx.SafeYield, wx.YieldIfNeeded).
> 
> Regards,
> 
> 
> Bj?rn
> 


From kkuang at torreyhillstech.com  Sun Aug 19 13:49:11 2007
From: kkuang at torreyhillstech.com (Torrey Hills)
Date: Sun, 19 Aug 2007 17:49:11 -0000
Subject: A/C Systems!
In-Reply-To: <1187545327.963222.223220@w3g2000hsg.googlegroups.com>
References: <1187545194.099278.217330@w3g2000hsg.googlegroups.com>
	<1187545327.963222.223220@w3g2000hsg.googlegroups.com>
Message-ID: <1187545751.122168.89790@i38g2000prf.googlegroups.com>

On Aug 19, 10:42 am, carairconditionersm... at gmail.com wrote:
> On Aug 19, 7:39 pm, Cartun... at gmail.com wrote:
>
> > Everything you need to know about car air conditioners...
>
> >http://car-air-conditioning.blogspot.com/
>
> Great website man, I found everything I need

A lot of wonderful tips. Thanks.

Ken


Opportunities are never lost. The other fellow takes those you miss.


| Torrey Hills Technologies, LLC    |
| www.threerollmill.com                |
| www.torreyhillstech.com             |





From yan.python at gmail.com  Tue Aug 14 10:59:42 2007
From: yan.python at gmail.com (yan.python at gmail.com)
Date: Tue, 14 Aug 2007 14:59:42 -0000
Subject: how to move cursor in Interactive Interpreter
In-Reply-To: <f9sa7f$amh$00$1@news.t-online.com>
References: <1187072484.626674.157200@x40g2000prg.googlegroups.com>
	<f9rivq$sfc$00$1@news.t-online.com>
	<1187090548.811916.124450@x40g2000prg.googlegroups.com>
	<f9sa7f$amh$00$1@news.t-online.com>
Message-ID: <1187103582.015207.128020@g12g2000prg.googlegroups.com>

On 8 14 ,   9 20 , Peter Otten <__pete... at web.de> wrote:
>  yan.pyt... at gmail.com wrote:
> > what am i supposed to do to install the module GNU readline correctly
> > then?
> > by the way,my linux is Mandriva 10
>
> Use the package manager of your distribution to install the readline
> development package -- after some struggle with Mandriva's website I came
> to suppose that it's libreadline5-devel for you:
>
> urpmi libreadline5-devel.rpm
>
> After you have successfully installed that package unpack the python archive
> into a fresh directory and do the configure/make/install dance. No manual
> changes should be necessary.
>
> Peter



i've re-install python as you said,and it works now
i really appreciate your help
thanks!



From xah at xahlee.org  Fri Aug 24 23:55:59 2007
From: xah at xahlee.org (Xah Lee)
Date: Fri, 24 Aug 2007 20:55:59 -0700
Subject: Xah's Edu Corner: Under the spell of Leibniz's dream
In-Reply-To: <mailman.224.1187927357.32294.python-list@python.org>
References: <1187567809.896668.228650@z24g2000prh.googlegroups.com>
	<1187598193.118227.270460@19g2000hsx.googlegroups.com>
	<46ca1e65$1_3@news.chariot.net.au> <5j4rrfF3s3h2rU1@mid.dfncis.de>
	<1187908258.609624.321990@m37g2000prh.googlegroups.com>
	<mailman.224.1187927357.32294.python-list@python.org>
Message-ID: <1188014159.445663.17500@m37g2000prh.googlegroups.com>

2007-08-24

Steve Holden wrote:
?It's already well-established that there's no point flamingXahLee, as
he's pretty much an output-only source. See any responses from him on
this thread??

Hum? so you want to dance?

FYI, i have made a second post to this thread. See:
http://groups.google.com/group/comp.lang.functional/msg/973fe835bd0ad230?dmode=source

The content is too abstruse for general imperative programers to
understand, so i limited it to only the functional programing groups.
But frankly, even there, very few are capable of appreciating it. To
be more frank, the majority of math PHD holders in this world today,
do not have sufficient knowledge about the subject to appreciate what
i wrote.

  Xah
  xah at xahlee.org
? http://xahlee.org/



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug 29 12:32:46 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 29 Aug 2007 18:32:46 +0200
Subject: Creating a multi-tier client/server application
In-Reply-To: <1188398008.538820.21960@d55g2000hsg.googlegroups.com>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
	<46d57888$0$295$426a74cc@news.free.fr>
	<1188398008.538820.21960@d55g2000hsg.googlegroups.com>
Message-ID: <46d59fa8$0$278$426a74cc@news.free.fr>

Jeff a ?crit :
>> You could explore something like a custom-made GUI client app
>> communicating thru the http protocol with a web-server app. http is just
>> a protocol, and it doesn't necessarily imply using html and a browser...
>> IIRC, some GUI toolkits uses XML description files for the UI.
> 
> That, or something similar, may be what I do.  It would mean, however,
> developing my own method for transferring objects across the network,

Why transfering "objects" ? You only need to transfer data.

(snip)


From steve at holdenweb.com  Mon Aug  6 19:22:12 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Aug 2007 19:22:12 -0400
Subject: maybe a popen question... or something else?
In-Reply-To: <1186441210.383700.301790@i13g2000prf.googlegroups.com>
References: <1186441210.383700.301790@i13g2000prf.googlegroups.com>
Message-ID: <46B7AD24.4010305@holdenweb.com>

dude wrote:
> Working on Windows XP
> Say I have a Windows executable, foo.exe.
> foo.exe is a command line tool that can take a number of different
> arguments and perform corresponding actions.
> 
> I want to invoke foo.exe from a Python script (using whatever will
> work best).  I want to continuously pass arguments to foo.exe in
> between doing other stuff from within my Python script.
> 
> Some pseudo code:
> 
> processHandle = invoke("foo.exe") # what python module should "invoke"
> be here?
> 
> doUnrelatedStuff()
> 
> processHandle.passArgs("arg1 arg2") # The same foo.exe I invoked above
> gets these args for processing
> 
> doMoreUnrelatedStuff()
> 
> processHandle.passArgs("arg3 arg4") # The same foo.exe I invoked above
> gets these args for processing
> 
> processHandle.close() # "foo.exe is destroyed"
> 
> Thanks for any help.
> 
When you say "pass arguments", the methodology you outline definitely 
isn't going to fly with argument passing. When a command is invoked the 
arguments are taken from the command line, so it isn't possible to pass 
further arguments at a later time.

You probably need to write to you sub-process's standard input stream. 
which you can do whit the subprocess module (the modern way to do it) or 
one of the various popen() functions.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From mtobis at gmail.com  Sat Aug  4 11:10:49 2007
From: mtobis at gmail.com (Michael Tobis)
Date: Sat, 04 Aug 2007 15:10:49 -0000
Subject: the one python book
In-Reply-To: <b60ti.37345$G23.30474@newsreading01.news.tds.net>
References: <mailman.1611.1186233912.22759.python-list@python.org>
	<b60ti.37345$G23.30474@newsreading01.news.tds.net>
Message-ID: <1186240249.433185.291390@r34g2000hsd.googlegroups.com>

On Aug 4, 9:32 am, Neil Cerutti <horp... at yahoo.com> wrot

> With Python, you won't find anything like that. Python is too
> huge.

That's silly. Python is small in the sense that C is small. The Python
standard library is probably much bigger than the C standard library,
but Kernghan and Richie don't cover it.

K&R is a unique book. I have never seen anything comparable for any
language. The closest Python equivalent is the official docs:

http://docs.python.org/

I think the core Python bookshelf is:

Learning Python (Lutxz & Ascher) and/or
Dive Into Python (Pilgrim) for tutorial

Python in a Nutshell (Martelli) AND
Python Essential Reference (Beazley) for reference

The latter two books are not perfect (both indexes are infuriating)
but I usually find that I can find what I am looking for in one or the
other.

Like most people I eventually plan to read Moby Dick, War and Peace,
and Lutz's Programming Python. Maybe when I retire.

mt



From AWasilenko at gmail.com  Sat Aug 11 12:40:02 2007
From: AWasilenko at gmail.com (Adam W.)
Date: Sat, 11 Aug 2007 16:40:02 -0000
Subject: Who told str() to round my int()'s!!!
Message-ID: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>

After a fair amount of troubleshooting of why my lists were coming
back a handful of digits short, and the last digit rounded off, I
determined the str() function was to blame:

>>> foonum
0.0071299720384678782
>>> str(foonum)
'0.00712997203847'
>>>

Why in the world does str() have any business rounding my numbers, and
how do I get around this?



From joesox at gmail.com  Mon Aug 20 22:35:21 2007
From: joesox at gmail.com (JoeSox)
Date: Mon, 20 Aug 2007 19:35:21 -0700
Subject: Python project solicitation
Message-ID: <785694cd0708201935s7472a658u1f507776dfcb8e1e@mail.gmail.com>

Hello All,

I was wondering if anyone would be interested in improving a module I
quickly hacked together this past Sunday: pswrdgen.py

It is a semantic password generator that uses WordNet 2.1, random
capitalization, and character swapping.
http://code.google.com/p/pswrdgen/

I must say this thing is pretty cool.  I had a coworker try it out and
he ran into problems getting it to run on his Linux OS.  So I am
really looking for some non-Windows developers to take a look at it.
All of the info is at the project site above.
Thanks.

And on a side note, I see a bunch of Python newbies here. I really
recommend "Python Phrasebook" by Brad Dayley.  This thing is small
enough to fit in your back pocket and lots of basic code phrases.
-- 
Later, Joe


From __peter__ at web.de  Sun Aug 12 06:18:39 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 12 Aug 2007 12:18:39 +0200
Subject: Fatest standard way to sum bytes (and their squares)?
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
	<f9mlne$k0k$02$2@news.t-online.com>
	<f9mlvv$k0k$02$3@news.t-online.com>
Message-ID: <f9mmq0$885$00$1@news.t-online.com>

Peter Otten wrote:

> lookup  = [i**2 for i in range(256)]
> 
>> def summit_str(data=data):
>>     return sum(ord(x) for x in data), sum(ord(x)**2 for x in data)
>> 
>> def summit_array(data=data, lookup=lookup):
>>     a = array.array("B")
>>     a.fromstring(data)
>>     return sum(a), sum(lookup[x] for x in a)

> $ python -m timeit -s'from summit import summit_array as summit'
> 'summit()' 100 loops, best of 3: 12.9 msec per loop

from itertools import imap

def summit_array(data=data, lookup=lookup):
    a = array.array("B")
    a.fromstring(data)
    return sum(a), sum(imap(lookup.__getitem__, a))

$ python -m timeit -s'from summit import summit_array as summit' 'summit()'
100 loops, best of 3: 9.15 msec per loop

I think I'll stop here...

Peter


From arkanes at gmail.com  Wed Aug 15 20:37:04 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 15 Aug 2007 19:37:04 -0500
Subject: Move files/directories to Recycle Bin using standard Python libs
In-Reply-To: <1187211948.913922.197830@m37g2000prh.googlegroups.com>
References: <f9va80$ciu$1@foggy.unx.sas.com>
	<mailman.2027.1187204570.22759.python-list@python.org>
	<f9vlnk$ike$1@foggy.unx.sas.com>
	<1187211948.913922.197830@m37g2000prh.googlegroups.com>
Message-ID: <4866bea60708151737p4d8bb3b7q54b675da636050a4@mail.gmail.com>

On 8/15/07, kyosohma at gmail.com <kyosohma at gmail.com> wrote:
> On Aug 15, 2:55 pm, Kevin D. Smith <Kevin.Sm... at sas.com> wrote:
> > On 2007-08-15 13:02:24 -0600, "Chris Mellon" <arka... at gmail.com> said:
> >
> > > Not easily. The recycle bin is part of the shell, and the shell api
> > > calls have very complicated struct parameters that are cumbersome to
> > > use correctly from ctypes. If you do the work to map the fileop
> > > structs to ctypes you can call the shell API file operation functions
> > > in shell32.dll. This assumes that "standard" for you is Python 2.5,
> > > which has ctypes. Otherwise you are out of luck.
> >
> > Unfortunately, I need this to work on Python 2.4 as well...
> >
> > --
> > Kevin D. Smith
>
> As I mentioned in my previous post, you can download ctypes from
> sourceforge for 2.4.
>
> Mike
>

If you're going to install a third party lib, install pywin32 and do
it the easy way. OP said he wanted to it with standard library only.


From wgwigw at gmail.com  Wed Aug  1 03:11:07 2007
From: wgwigw at gmail.com (momobear)
Date: Wed, 01 Aug 2007 07:11:07 -0000
Subject: Any way to monitor windows network connection?
In-Reply-To: <_ICdnc3T261KgC3bnZ2dnUVZ_oHinZ2d@comcast.com>
References: <1185939997.135825.310080@z24g2000prh.googlegroups.com>
	<_ICdnc3T261KgC3bnZ2dnUVZ_oHinZ2d@comcast.com>
Message-ID: <1185952267.173790.279900@j4g2000prf.googlegroups.com>

On Aug 1, 1:47 pm, Gordon Airporte <JHoo... at fbi.gov> wrote:
> momobear wrote:
> > hi, Is there any way to show me detailed listings of all TCP and UDP
> > endpoints in my microsoft windows XP in python way?
> > thanks.
>
> Unless you're looking for a programming exercise:http://www.microsoft.com/technet/sysinternals/Utilities/TcpView.mspx

Ok, It works, but there're no source code of it. I wish to build a
tools to show all the network endpoints, cpu usage and top ten
processes in a dockapp like application.



From jstroud at mbi.ucla.edu  Thu Aug 30 15:49:42 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 30 Aug 2007 12:49:42 -0700
Subject: Important Research Project
In-Reply-To: <1188482087.098419.56490@k79g2000hse.googlegroups.com>
References: <13ddcvm1bsu3s94@corp.supernews.com>
	<1188482087.098419.56490@k79g2000hse.googlegroups.com>
Message-ID: <fb770m$nf2$2@zinnia.noc.ucla.edu>

Paul McGuire wrote:
> GTFA,

Very funny. I'm sure it would have been funnier if I had the patience to 
read the original posting. I'm guessing you paraphrased the content 
sufficiently well in your reply.

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From fakeaddress at nowhere.org  Sun Aug 19 09:10:31 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sun, 19 Aug 2007 06:10:31 -0700
Subject: Development for dual core machine
In-Reply-To: <1187515287.226791.186700@j4g2000prf.googlegroups.com>
References: <1187515287.226791.186700@j4g2000prf.googlegroups.com>
Message-ID: <6jXxi.1074$vU4.15@nlpi068.nbdc.sbc.com>

Andy wrote:
> I'm going to develop a software package that includes a web server
> (and PHP code) , a database, and some Python code of course.  I am
> being strongly suggested to make it to work on a dual- or multi-core
> computer, but I'm confused on how to take advantage of the multiple
> CPUs.
> 
> From what I read, I think that simply by making the package run in
> several separate processes (web server, database server, Python
> interpreter, etc.), and/or using multiple threads (which I will
> anyway) the package should be able to use multiple CPUs.

Right. There is a theoretical possibility that Python's GIL
could limit thread parallelism, but in this kind of application
it should not matter in the least. Either you're I/O bound, or
there are plenty of tasks the operating system could schedule.

If you have the option to run the Python interpreter within a
web-server process, that's usually a performance winner.

> Is my understanding correct?  So actually, all I have to do is just
> write my multi-threaded Python code as usual?  And how is it decided
> which process and which threads go to CPU 1, CPU 2, etc.?  Perhaps the
> BIOS?

The O.S. actually. A lot of really smart people have put a whole
lot of work into making the O.S. do that well.

If you usually write your Python apps multi-threaded, as I do,
that's fine. Multi-core efficiency has only a little to do with
it. Web service are, for the most part, intrinsically
parallelizable: run multiple web servers, and multiple Python
interpreters serving multiple connections.

The only hard part is shared data. Scalability is all about
the database.


-- 
--Bryan


From python at jayloden.com  Mon Aug 20 17:31:00 2007
From: python at jayloden.com (Jay Loden)
Date: Mon, 20 Aug 2007 17:31:00 -0400
Subject: optparse - required options
In-Reply-To: <496954360708201353v19ea266cr50f144d1d71d5912@mail.gmail.com>
References: <496954360708201251r137dfaedqe632361891eae343@mail.gmail.com>	
	<46C9F7D1.9040506@jayloden.com>
	<496954360708201353v19ea266cr50f144d1d71d5912@mail.gmail.com>
Message-ID: <46CA0814.6050200@jayloden.com>

Robert Dailey wrote:
> Well, I don't know what is wrong with people then. I don't see how
> required arguments are of bad design. Some command-line applications are
> built around performing tasks based on information received. Compilers,
> for example. A compiler can't do much of anything unless you give it at
> the very least a filename. So, a --file command would most definitely be
> one required argument. Anyway, I'm not trying to start a debate on this
> issue. I have my own implementation for required arguments at the
> moment, I am just a little bit surprised that this module doesn't make
> it convenient. It would definitely help on code duplication.
> 
> Thanks for your response.

I tend to agree...while "required option" may be an oxymoron in English, I can think of quite a few scripts I've written myself (in various languages) that needed at least some kind of user input to operate. At least the documentation points to some examples for helpful hints, example code is a lot better than nothing ;)

-Jay


From uymqlp502 at sneakemail.com  Fri Aug 31 04:02:49 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Fri, 31 Aug 2007 01:02:49 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1i3o9kr.2gmni61g62moaN%aleax@mac.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
Message-ID: <1188547369.428712.194430@x35g2000prf.googlegroups.com>

On Aug 30, 7:20 pm, al... at mac.com (Alex Martelli) wrote:
> Russ <uymqlp... at sneakemail.com> wrote:
>
>    ...
>
> > programs." Any idea how much Python is used for flight control systems
> > in commercial
> > transport aircraft or jet fighters?


Hi Alex. I've always enjoyed your Piggies talks at
Google (although I missed he last one because I was out
of town). I'm disappointed to see that you seem to have
taken personal offense from remarks I made to someone else who
attacked
me first. I will take issue with some of your remarks,
bit none of it is intended to be personal, and I sincerely hope
you don't take it that way.


> Are there differences in reliability requirements between the parts of
> such control systems that run on aircraft themselves, and those that run
> in airports' control towers?  Because Python *IS* used in the latter
> case, cfr <http://www.python.org/about/success/frequentis/> ... if
> on-plane control SW requires hard-real-time response, that might be a
> more credible reason why Python would be inappropriate (any garbage
> collected language is NOT a candidate for hard-real-time SW!) than your
> implied aspersions against Python's reliability.


I've seen that site before. They have a nice product
that was developed in Python, but it is not clear to me
that is actually safety-critical. It appears to be a
GUI designer for displays at air traffic control towers.
I can't tell if this is "just" a development tool, or if it
the python-based product is actually used directly by
controllers. Also, this product does not seem to actually
display aircraft to controllers. It seems to be more of
a semi-static display of runway conditions. Not to
minimize its importance, but I don't know if this product
actually qualifies as safety critical, and if it does,
it probably does so only marginally.


> According to
> <http://uptime.pingdom.com/site/month_summary/site_name/www.google.com>,
> Google's current uptime is around 99.99%, with many months at 100% and a
> few at 99.98% -- and that's on *cheap*, not-that-reliable commodity HW,
> and in real-world conditions where power can go away, network cables can
> accidentally get cut, etc.  I'm Uber Tech Lead for Production Systems at
> Google -- i.e., the groups I uber-lead are responsible for some software
> which (partly by automating things as much as possible) empowers our
> wondrous Site Reliability Engineers and network specialists to achieve
> that uptime in face of all the Bad Stuff the world can and does throw at
> us.  Guess what programming language I'm a well-known expert of...?


I certainly cannot deny the success of Google, but I
don't think that a high uptime with thousands of servers
is comparable to reliable safety-critical software. You
can't put thousands of flight management computers on
an airplane and just switch over to another as they go
fail. And if a web server gives bogus results nobody
worries much, but if a flight computer gives bogus
outputs, some people worry a lot.

By the way, I use Google Groups, and it has a few
annoying glitches. For example, I couldn't read your
post without scrolling horizontally. With all the money
and manpower at Google's disposal, couldn't you fix that
problem? Another problem I have had for months is that
when I write a message to post, I get no auto scrolling,
so I have to add manual line breaks to keep the text from
running out of the window -- then the reader sees all
those ugly misplaced line breaks in the output. These are
just annoyances, but why hasn't Google fixed them yet?

The point I am trying to make is that, while Google does
great things, and is very successful commercially, the
quality of its code could certainly use some improvement.
Microsoft is also very successful commercially, but
certainly you wouldn't argue that is is a result of the
quality of its software, I hope.

I may have a simplistic view, but I have always thought
that the requirements of most Google code are the very
antithesis of the requirements of safety critical code.
When I do a search, I
fully expect most of the results to be crap. It's a
scattershot approach. If I get one good result, I am
usually happy. Safety critical software is exactly the
opposite: if you get one *bad* result, you could be in
a heap of something nasty.



> > The important question is this: why do I waste my time with bozos like
> > you?
>
> Yeah, good question indeed, and I'm asking myself that -- somebody who
> posts to this group in order to attack the reliability of the language
> the group is about (and appears to be supremely ignorant about its use


I am sorry that you took offense at my pointing out the
weaknesses of Python. It's a great language for certain
kinds of applications, but it is not necessarily
appropriate for everything. I am personally using it for
prototyping a safety critical system that, if it is
ultimately fielded, will affect the safety of
millions of people, including you. However, my Python
prototype is for research and design purposes. The
ultimate implementation is very unlikely to be in Python.
Even so, I would like to make my prototype as reliable
as possible, and that is why I am interested in the
idea of self-testing code or "programming by contract."


> in air-traffic control and for high-reliability mission-critical
> applications such as Google's "Production Systems" software) might well
> be considered not worth responding to.  OTOH, you _did_ irritate me
> enough that I feel happier for venting in response;-)
>
> Oh, FYI -- among the many tasks I undertook in my quarter-century long
> career was leading and coordinating pilot projects in Eiffel for one
> employer, many years ago.  The result of the pilot was that Eiffel and
> its DbC features didn't really let us save any of the extensive testing
> we performed for C++-coded components, and the overall reliability of
> such extensively tested components was not different in a statistically
> significant way whether they were coded in C++ or Eiffel; Eiffel did let
> us catch a few bugs marginally earlier (but then, I'm now convinced
> that, at that distant time, we used by far too few unit-tests for early
> bug catching and relied too much on regression and acceptance tests),
> but that definitely was _not_ enough to pay for itself.  DbC and
> allegedly rigorous compile-time typechecking (regularly too weak due to
> Eiffel's covariant vs countervariant approach, btw...), based on those
> empirical results, appear to be way overhyped.


First of all, I am having a hard time reading your post
because Google is forcing me to scroll horizontally to
read each line. But all I can say is that your experience
with self-testing code doesn't seem to be consistent
with the experience of many others who have used it. Is it
possible that you didn't use it to its fullest extent?


> A small decorator library supporting DbC would probably be a nice
> addition to Python, but it should first prove itself in the field by
> being released and supported as an add-on and gaining wide acceptance:
> "arguments" such as yours are definitely NOT going to change that.


I'm sorry to see that you are so closed-minded about the
idea. I get the impression that you are close to the
Benevelent Dictator, but I can only hope that he remains
more open minded than you. I already explained why I don't like
the "decorator" approach (it puts the conditions outside
of the body of the function, for one thing).

I can only say that I am happy that I can always use
the implementation described in PEP 316. That's the
beauty of open source, isn't it.



From zyzhu2000 at gmail.com  Sat Aug 18 20:45:34 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Sun, 19 Aug 2007 00:45:34 -0000
Subject: How to make a module function visible only inside the module?
Message-ID: <1187484334.091530.90420@m37g2000prh.googlegroups.com>

Hi Everyone,

Is there any equivalent version of C's static function in Python. I
know I can make a class function private by starting a function name
with two underscores, but it does not work with module functions.

For exmaple, __func1 is still visible outside the module.

mymodule.py
"""my module""

def __func1():
    print "Hello"



main.py
import mymodule

mymodule.__func1()

Thanks,
Geoffrey



From ricaraoz at gmail.com  Mon Aug 13 15:22:06 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Mon, 13 Aug 2007 16:22:06 -0300
Subject: Finding gurus (was Re: Something in the function tutorial confused
	me.)
In-Reply-To: <f9kd93$lg8$1@panix3.panix.com>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>	<mailman.1737.1186577596.22759.python-list@python.org>	<5hv705F3mk67nU1@mid.individual.net>	<1i2nhnv.2y00l5173lfbbN%aleax@mac.com>
	<f9kd93$lg8$1@panix3.panix.com>
Message-ID: <46C0AF5E.3060701@bigfoot.com>

Aahz wrote:
> In article <1i2nhnv.2y00l5173lfbbN%aleax at mac.com>,
> Alex Martelli <aleax at mac.com> wrote:
>> Because of this, a Google search for
>>
>>  "<name> <surname>" python
>>
>> may sometimes help; when you get 116,000 hits, as for "Steve Holden"
>> python, that may be a reasonable indication that the poster is one of
>> the world's Python Gurus (in fact, the winner of the 2007 Frank WIllison
>> Award -- congratulations, Steve!!!).
> 
> Sometimes that precise search pattern isn't appropriate, of course.  ;-)

Sorry, will answer as soon as I read the 52000 hits for "Aahz python".
Be patient ;c)




From timr at probo.com  Sat Aug  4 21:46:51 2007
From: timr at probo.com (Tim Roberts)
Date: Sun, 05 Aug 2007 01:46:51 GMT
Subject: os.listdir path error
References: <1186170609.001778.15230@l70g2000hse.googlegroups.com>
	<1186171610.333624.103640@e9g2000prf.googlegroups.com>
Message-ID: <cuaab3hsr3tvggqb9lrl3aakaif46qt88p@4ax.com>

kyosohma at gmail.com wrote:
>
>I get "SyntaxError: EOL while scanning single-quoted string", which is
>what should happen when you escape the double-quotes at the end. Not
>sure how you're getting that WindowsErrors.
>
>If I do  os.listdir('c:\python24')  instead, it works fine.

Yes, but only by accident.  It will fail again if you try to do
os.listdir('c:\tmp').  You need to use the right quoting.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From attn.steven.kuo at gmail.com  Wed Aug  1 15:57:20 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Wed, 01 Aug 2007 12:57:20 -0700
Subject: Awkward format string
In-Reply-To: <1185986578.527619.314310@e9g2000prf.googlegroups.com>
References: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
	<mailman.1440.1185985928.22759.python-list@python.org>
	<1185986578.527619.314310@e9g2000prf.googlegroups.com>
Message-ID: <1185998240.878225.286520@e9g2000prf.googlegroups.com>

On Aug 1, 9:42 am, beginner <zyzhu2... at gmail.com> wrote:


(snipped)

>
> e is not complicated. It is a record that have 7 fields. In my program
> a function outputs a list of tuples, each is of type e, and now I just
> need to send them to a text file.
>
> I have no problem using classes and I do use them everywhere. But
> using classes does not solve my problem here. I will probably find
> myself doing:
>
> print  >>f, "%s\t%s\t%d\t%f\t%f\t%f\t%d" % (x.field1..strftime("%Y-%m-
> %d"), x.field2..strftime("%Y-%m-%d"), x.field3, x.field4, x.field5,
> x.field.6, x.field7)
>
> This is also tedious and error-prone.



You can implement a __str__ special method in a class.  You can
use 'type' to examine, well, the type of an object.  So:

from datetime import datetime

class PrettyDT(datetime):
    def __str__(self):
        return self.strftime('%Y-%m-%d')


e = (PrettyDT(2007, 8, 1), PrettyDT(2007, 8, 2),
        1, 2.0, 3.0, 4)

print '\t'.join(str(each) for each in e)


# Or even

format = { int: '%d', float: '%f', PrettyDT: '%s' }
format_string = '\t'.join(format[type(each)] for each in e)
print format_string % e;

--
Hope this helps,
Steven



From jjl at pobox.com  Sat Aug 11 07:25:01 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 11 Aug 2007 11:25:01 GMT
Subject: cookielib
References: <f9i1ah$e3v$1@localhost.localdomain>
Message-ID: <87bqdeuxde.fsf@pobox.com>

Boris Ozegovic <ninja.krmenadl at nes.com> writes:

> Hi
>
> I have HTTP client which accepts cookies.  If client allready has cookie,
> but that cookie has expired, server sends him new cookie, and in response
> object Set-Cookie: header everything is fine, but if I reload request,
> client sends expired cookie, and not the new one.  In cookiejar there is
> only new and valid cookie, and if I use regular browser everything is fine.
> The code is following:
>
> urlopen = urllib2.urlopen
> Request = urllib2.Request
> cj = cookielib.LWPCookieJar()
> COOKIEFILE = 'cookies.lwp'
> 	
> if os.path.isfile(COOKIEFILE):
> # if we have a cookie file already saved
> # then load the cookies into the Cookie Jar
>     cj.load(COOKIEFILE)
>
> opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
> urllib2.install_opener(opener)
> url = "http://localhost:8000/files/index.html"
> params = {'question':question}
> data = urllib.urlencode(params)
> Request(url, data)
> try:
>     response = urlopen(Request)
>     etc.
>     
> Only if I create new request object the new cookie is send, but I don't
> want to create new object.  And idea?    

You seem to suggest in your first paragraph that you call urlopen more
than once, but in the code you show, you call it only once.

This is the way HTTP cookies work: you can't send back a cookie before
you've received it.  So, you need two HTTP requests: one to get the
cookie, and a second to send it back again.

However, some websites arrange things so that a single attempt to load
a URL results in multiple HTTP requests.  One common way to do that is
by using an "HTTP Refresh" -- look at the top of the HTML to see if
there's a META tag something like this:

<meta http-equiv="refresh" content="1" />

This means that the browser should reload the page after a pause of
one second.  Often, the reloaded page then does not contain another
meta refresh tag, so that the page does not reload every second
forever (the server knows not to include the tag because it received
the cookie).

This tag can be supported by appropriate Python code.  So, two HTTP
requests needn't necessarily mean two urlopen calls.  This library
handles refresh redirections, and supports essentially the same
interface as urllib2 and cookielib (the union of the two interfaces):

http://wwwsearch.sourceforge.net/mechanize/


John


From sbellon at sbellon.de  Sat Aug 11 08:50:33 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Sat, 11 Aug 2007 14:50:33 +0200
Subject: Destruction of generator objects
References: <20070808002852.6228ae91@cube.tz.axivion.com>
	<1186613044.494852.306970@q75g2000hsh.googlegroups.com>
	<20070809011441.05d7dfb6@cube.tz.axivion.com>
	<1186819365.988117.232230@g4g2000hsf.googlegroups.com>
	<20070811121630.1b010eab@cube.tz.axivion.com>
	<1186831173.814193.235420@o61g2000hsh.googlegroups.com>
	<20070811140017.22a11f82@cube.tz.axivion.com>
	<1186834823.389706.137980@r34g2000hsd.googlegroups.com>
Message-ID: <20070811145033.18c70c0c@cube.tz.axivion.com>

On Sat, 11 Aug, Kay Schluehr wrote:

> But why shall the destructor be called? Your example does not indicate
> that a ListGenerator object is somewhere destroyed neither explicitely
> using del nor implicitely by destroying the scope it is living in.

After having constructed the list itself, the generator is exhausted
and not iterated or referenced anymore, so the generator should be
destroyed, shouldn't it?

Ok, let's make the example easier and take out the external iterator
resource and just concentrate on the Python part:

class ListGenerator(object):
    def __init__(self):
        print "gen init"
        self.gen = self._value()

    def __del__(self):
        print "gen del"

    def _value(self):
        print "gen value"
        for i in xrange(4):
            yield i

    def __iter__(self):
        print "gen iter"
        return self

    def next(self):
        print "gen next"
        return self.gen.next()

Now, doing the following:

>>> a = ListGenerator()
gen init
>>> a
<__main__.ListGenerator object at 0x4020c3ec>
>>> for i in a: print i
... 
gen iter
gen next
gen value
0
gen next
1
gen next
2
gen next
3
gen next
>>> del a
>>>

So why is the destructor not called when the generator is even
explicitly 'del'ed? Does somebody else still hold a reference on it?
But then, even when terminating the interpreter, __del__ is not called.
When taking out the yield statement, __del__ is called again. It looks
to me that as soon as a generator function is involved in the class,
the __del__ is not called anymore.

-- 
Stefan Bellon


From llasram at gmail.com  Thu Aug 16 07:37:07 2007
From: llasram at gmail.com (Marshall T. Vandegrift)
Date: Thu, 16 Aug 2007 07:37:07 -0400
Subject: Coroutines and argument tupling
References: <mailman.2032.1187207899.22759.python-list@python.org>
	<5ih63mF3pvnt7U1@mid.individual.net> <87k5rwo24e.fsf@seneca.iss.local>
	<5iikd6F3pfrhrU1@mid.individual.net>
Message-ID: <87absrogm4.fsf@seneca.iss.local>

Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:

> The solution I'd use is a decorator that calls next automatically one
> time after instantiation. Then you can use send normally, and don't
> have to care about any initial parameters, which makes the code
> clearer (initial parameters should be used for setup purposes, but not
> for the first iteration, IMHO). It'd look like this (from PEP 342,
> http://www.python.org/dev/peps/pep-0342/):

I'd seen the consumer decorator, and it certainly is cleaner than just
using a generator.  I don't like how it hides the parameter signature in
the middle of the consumer function though, and it also doesn't provide
for argument default values.  It's the difference between:

    ...
    def __init__(self, ...):
        ...
        self.consumer = self._function(value)
        ...

    def function(self, first, second=3, *args, **kwargs):
        self.consumer.send((first, second, args, kwargs))

    @consumer
    def _function(self, setup):
        ...
        first, second, args, kwargs = yield # initial 'next'
        while condition:
            ...
            first, second, args, kwargs = yield retval

Versus just:

    @coroutine
    def function(self, first, second=3, *args, **kwargs):
        ...
        while condition:
            ...
            first, second, args, kwargs = yield retval

Thanks in any case for the replies!  Since I've apparently decided my
ArgPacker is worth it, the complete code for my coroutine decorator
follows.

-Marshall


import inspect
import types
import functools
from itertools import izip

__all__ = [ 'coroutine' ]

class ArgPacker(object):
    def __init__(self, function):
        args, varargs, varkw, defaults = inspect.getargspec(function)
        self.args = args or []
        self.varargs = (varargs is not None) and 1 or 0
        self.varkw = (varkw is not None) and 1 or 0
        self.nargs = len(self.args) + self.varargs + self.varkw
        defaults = defaults or []
        defargs = self.args[len(self.args) - len(defaults):]
        self.defaults = dict([(k, v) for k, v in izip(defargs, defaults)])

    def pack(self, *args, **kwargs):
        args = list(args)
        result = [None] * self.nargs
        for i, arg in izip(xrange(len(self.args)), self.args):
            if args:
                result[i] = args.pop(0)
            elif arg in kwargs:
                result[i] = kwargs[arg]
                del kwargs[arg]
            elif arg in self.defaults:
                result[i] = self.defaults[arg]
            else:
                return None
        if self.varargs:
            result[len(self.args)] = args
        elif args:
            return None
        if self.varkw:
            result[-1] = kwargs
        elif kwargs:
            return None
        return tuple(result)

class coroutine(object):
    """Convert a function to be a simple coroutine.
    
    A simple coroutine is a generator bound to act as much as possible like a
    normal function.  Callers call the function as usual while the coroutine
    produces new return values and receives new arguments with `yield'.
    """
    def __init__(self, function):
        self.function = function
        self.gname = ''.join(['__', function.__name__, '_generator'])
        self.packer = ArgPacker(function)
        coroutine = self
        def method(self, *args, **kwargs):
            return coroutine.generate(self, self, *args, **kwargs)
        self.method = method
        functools.update_wrapper(self, function)
        functools.update_wrapper(method, function)

    def __get__(self, obj, objtype=None):
        return types.MethodType(self.method, obj, objtype)
        
    def __call__(self, *args, **kwargs):
        return self.generate(self, *args, **kwargs)

    def generate(self, obj, *args, **kwargs):    
        try:
            generator = getattr(obj, self.gname)
        except AttributeError:
            generator = self.function(*args, **kwargs)
            setattr(obj, self.gname, generator)
            retval = generator.next()
        else:
            packed = self.packer.pack(*args, **kwargs)
            if packed is None:
                self.function(*args, **kwargs) # Should raise TypeError
                raise RuntimeError("ArgPacker reported spurious error")
            retval = generator.send(packed)
        return retval



From dzjoost at gmail.com  Thu Aug 16 10:38:19 2007
From: dzjoost at gmail.com (Joost Molenaar)
Date: Thu, 16 Aug 2007 16:38:19 +0200
Subject: FM synthesis using Numpy
In-Reply-To: <1187189638.121287.311030@k79g2000hse.googlegroups.com>
References: <mailman.1990.1187134824.22759.python-list@python.org>
	<1187189638.121287.311030@k79g2000hse.googlegroups.com>
Message-ID: <3657a8860708160738i6c1b1caan8e0e9402d0d77232@mail.gmail.com>

Thanks/bedankt Bas for the educative reply. I think I got misleaded by
Max/MSP's tutorial[1], because MSP seems to automatically adjust the
phase when you combine two oscillators in the way that I did.

Joost

[1] page 112 of http://www.cycling74.com/download/MSP45TutorialsAndTopics.pdf


From joesox at gmail.com  Mon Aug 20 00:04:53 2007
From: joesox at gmail.com (JoeSox)
Date: Sun, 19 Aug 2007 21:04:53 -0700
Subject: How do I call anonymous classes from imported modules?
In-Reply-To: <fab13k$9tn$1@zinnia.noc.ucla.edu>
References: <mailman.2179.1187578824.22759.python-list@python.org>
	<fab13k$9tn$1@zinnia.noc.ucla.edu>
Message-ID: <785694cd0708192104x3865c75fx73697da92dcb1ff5@mail.gmail.com>

On 8/19/07, James Stroud <jstroud at mbi.ucla.edu> wrote:
> Quick and dirty (you could also use a try: except:):
>
> f = __import__(module_name)
> for anobj in f.__dict__.values():
>   if hasattr(anobj, 'do_foobar'):
>     anobj.do_foobar()
>
> Note that this does not test whether anobj is a class as this would
> entail a type-check, which hints to poor design.

Thanks for the help.  The __dict__.values() is something I have not
previously looked into but it does not work as desired because python
wants an instance of the class.  How can I cast an object if I don't
know what type of object it is (example.ticker, in this debug)?

>>> modname = sensorsList[0].__name__
>>> m = __import__(modname)
>>> for anobj in m.__dict__.values():
	if hasattr(anobj, 'do_foobar'):
		anobj.do_foobar()

		
Traceback (most recent call last):
  File "<pyshell#76>", line 3, in ?
    anobj.do_foobar()
TypeError: unbound method do_foobar() must be called with ticker
instance as first argument (got nothing instead)


From gherzig at fmed.uba.ar  Fri Aug 17 12:14:13 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Fri, 17 Aug 2007 13:14:13 -0300
Subject: advice about `correct' use of decorator
In-Reply-To: <46C590FB.9090403@shopzeus.com>
References: <46C4B097.4080309@fmed.uba.ar> <46C4B81A.8000304@shopzeus.com>
	<46C4C1B4.6050605@fmed.uba.ar> <46C590FB.9090403@shopzeus.com>
Message-ID: <46C5C955.1020004@fmed.uba.ar>

Laszlo Nagy wrote:

>
>>>
>>> Are you developing a website or a GUI program?
>>>
>>>
>> It will be used in a web development. It is an important point?
>
> Yes, I think. Unless you use AJAX. :-) Most web sites work this way:
>
> user clicks -> request to server -> process on server -> response
>
> I would rather enclose the whole handler in try/except and raise a 
> custom PermissionDenied exception when the user has inscuficient 
> permissions. There are problems with a decorator used for 
> authorization. The context needs to be determined. E.g. which user is 
> accessing the method? (It can be hard to tell if the method is part of 
> a thread object that lies in a thread pool and is shared between 
> simultaneous clients...) Also it might be that the method's purpose is 
> to change objects of the same class, and the user has permission to 
> modify one object but not the other. In this case, authorization must 
> be done inside the function call... How do you express this with a 
> decorator?
>
> These are just ideas. You should analyze your problem and make your 
> decision. If you only want to restrict access to functions, then 
> probably using decorators is perfect.
>
> Best,
>
>   Laszlo
>
>
I post the change_pass() function as an example, there is a buch of 
other functions (the whole site actually) that will require a logged 
user.  May the change_pass() function have additional control, shure, 
but it will be not part of the `global' requirement.

Thank you very much for your time, Laszlo
Gerardo



From no at spam.com  Thu Aug 23 13:57:55 2007
From: no at spam.com (Farshid Lashkari)
Date: Thu, 23 Aug 2007 10:57:55 -0700
Subject: Question about embedding python in C++
In-Reply-To: <1187891085.147246.19380@i38g2000prf.googlegroups.com>
References: <1187891085.147246.19380@i38g2000prf.googlegroups.com>
Message-ID: <vUjzi.51$L_7.47@newsfe16.phx>

TheShadow wrote:
> When extending python in c/c++ after you register a module is there a
> way in c/c++ to check if they were correctly registered?
> 
> Cause I'm having the problem where when I execute the the python
> script it finds the module but none of the functions.
> 

Are you calling Py_InitModule(...) in your initmodule function? If so, 
Py_InitModule(...) returns a reference to the module object. You can use 
this object to double check that your function names exist in the 
modules dictionary. Most likely, there is an error in your code. If you 
post it, it would be easier to tell what the problem is.

-Farshid


From zzbbaadd at aol.com  Thu Aug 30 23:17:00 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Thu, 30 Aug 2007 20:17:00 -0700
Subject: list index()
In-Reply-To: <mailman.179.1188521931.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<87bqcod2gq.fsf@benfinney.id.au>
	<1188517370.998114.119940@q4g2000prc.googlegroups.com>
	<mailman.179.1188521931.28954.python-list@python.org>
Message-ID: <1188530220.815429.281380@i38g2000prf.googlegroups.com>


> Either I'm misunderstanding what you mean or you need to get a clue
> about what Python can already do before you go around making suggestions
> for what Python needs. Lists have supported "in" tests since at least
> version 1.5.2:
>
Well IN was what I was looking for and would have saved this thread.
However I don't believe IN showed up on the doc web page that has list
methods, where I found index().



From http  Wed Aug  8 02:35:20 2007
From: http (Paul Rubin)
Date: 07 Aug 2007 23:35:20 -0700
Subject: Seek the one billionth line in a file containing 3 billion lines.
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
Message-ID: <7xzm12o7o7.fsf@ruckus.brouhaha.com>

Sullivan WxPyQtKinter <sullivanz.pku at gmail.com> writes:
> This program:
> for i in range(1000000000):
>       f.readline()
> is absolutely every slow....

There are two problems: 

 1) range(1000000000) builds a list of a billion elements in memory,
    which is many gigabytes and probably thrashing your machine.
    You want to use xrange instead of range, which builds an iterator
    (i.e. something that uses just a small amount of memory, and
    generates the values on the fly instead of precomputing a list).

 2) f.readline() reads an entire line of input which (depending on
    the nature of the log file) could also be of very large size.
    If you're sure the log file contents are sensible (lines up to
    several megabytes shouldn't cause a problem) then you can do it
    that way, but otherwise you want to read fixed size units.


From aboudouvas at panafonet.gr  Fri Aug  3 11:05:03 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Fri, 03 Aug 2007 08:05:03 -0700
Subject: Eclipse/PyDev question.
In-Reply-To: <1186153259.372809.230110@d30g2000prg.googlegroups.com>
References: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>
	<1186153259.372809.230110@d30g2000prg.googlegroups.com>
Message-ID: <1186153503.806195.225560@g4g2000hsf.googlegroups.com>

On Aug 3, 5:00 pm, gregarican <greg.kuj... at gmail.com> wrote:
> On Aug 3, 10:58 am, king kikapu <aboudou... at panafonet.gr> wrote:
>
> > Hi,
> > this is actually a question to those of us who use Eclipse and Pydev
> > as their main Python developing environment. As i use Eclipse (3.3
> > Europa) only for Python and i have nothing to do with Java, is there a
> > way to disable/uninstall some Java-specific stuff and make the
> > environment actually more snappy ??
>
> > thanks for any help
>
> I've used Eclipse for Java, Python, and Ruby development and can say
> that AFAIK "Eclipse" and "snappy" are contradictions. Like "jumbo"
> "shrimp" :-/

xexexe...I am sure about that :) I was wondering if we can throw away
some java-stuff and make our life easier (or, snappier)...



From zhushenli at gmail.com  Mon Aug 27 23:00:13 2007
From: zhushenli at gmail.com (Davy)
Date: Mon, 27 Aug 2007 20:00:13 -0700
Subject: How to parse this line of code manually
Message-ID: <1188270013.785762.9360@z24g2000prh.googlegroups.com>

Hi all,

It is well known that Python is appreciated for its merit of concise.
However, I found the over concise code is too hard to understand for
me.

Consider, for instance,
def known_edits2(word):
    return set(e2 for e1 in edits1(word) for e2 in edits1(e1) if e2 in
NWORDS)

Shall I understand the code in set() as
for e2 in edits1(e1) {
    if e2 in NWORDS {
        for e1 in edits1(word) {
             e2
        }
    }
}

And a general question is: Is there any tip available to understand
the code in one line, or what's the parsing priority (left to right,
right to left, or other possibilities)

Any suggestions are welcome!

The code is a simple spell checker from
http://www.norvig.com/spell-correct.html

Best regards,
Davy



From faulkner891 at gmail.com  Wed Aug  8 22:43:20 2007
From: faulkner891 at gmail.com (faulkner)
Date: Wed, 08 Aug 2007 19:43:20 -0700
Subject: How can I programmatically find the name of a method from within
	that method?
In-Reply-To: <1186548312.672360.259100@q3g2000prf.googlegroups.com>
References: <1186548312.672360.259100@q3g2000prf.googlegroups.com>
Message-ID: <1186627400.727353.317750@d55g2000hsg.googlegroups.com>

On Aug 8, 12:45 am, kj7ny <kj... at nakore.com> wrote:
> Is there a way that I can programmatically find the name of a method I
> have created from within that method?  I would like to be able to log
> a message from within that method (def) and I would like to include
> the name of the method from which it was written without having to
> hard-code that value in every message string.  While we're at it, is
> there a way to programmatically get the name of the class and the
> module while I'm at it?
>
> Thanks,

def foo():
    print sys._getframe(0).f_code.co_name

most of the darkest magic of python is in the frames returned by
sys._getframe.



From bscrivener42 at gmail.com  Thu Aug 16 13:28:10 2007
From: bscrivener42 at gmail.com (BartlebyScrivener)
Date: Thu, 16 Aug 2007 17:28:10 -0000
Subject: A problem with Time
In-Reply-To: <5ija9dF3pjmsqU1@mid.uni-berlin.de>
References: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
	<5ija9dF3pjmsqU1@mid.uni-berlin.de>
Message-ID: <1187285290.931900.190830@m37g2000prh.googlegroups.com>

On Aug 16, 10:54 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:

> RTFM is the answer...

I don't know. I remember scratching my head for a day or two over the
module explanations and instructions until I found a little howto with
a lot of explicite examples.

http://pleac.sourceforge.net/pleac_python/datesandtimes.html

rd



From kw at codebykevin.com  Mon Aug  6 13:49:37 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Mon, 06 Aug 2007 13:49:37 -0400
Subject: Tkinter or wxpython?
In-Reply-To: <1186421115.402000.88080@x35g2000prf.googlegroups.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<46B73DE4.6040405@codebykevin.com>
	<1186421115.402000.88080@x35g2000prf.googlegroups.com>
Message-ID: <46B75F31.9070208@codebykevin.com>

kyosohma at gmail.com wrote:

> 
> I tried the PMW widget toolkit. It was ok, but it seemed kind of
> buggy. I found out about Tix on a forum of some sort. When I tried to
> find out how to get it and use it, all I found was conflicting
> information. I finally got it downloaded only to find I had to compile
> it and I didn't have the right version of TCL. So I switched to
> wxPython then. Months later I found out that Tix is now included with
> Python.
> 
> I still don't know how to use it though. As with most external Tkinter
> widget sets, Tix doesn't have examples. The docs look less inviting
> than man pages...but I realize that's probably just me. I just don't
> like man pages much.

Tkinter comes more naturally to me than other toolkits because I'm also 
a Tcl developer. I just haven't felt the need to learn wxPython because 
I can get what I need from Tkinter, even the more complicated GUI layouts.

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From deets at nospam.web.de  Tue Aug 14 09:23:36 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 14 Aug 2007 15:23:36 +0200
Subject: Class problems.
References: <46c1a34a$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <5idompF3o0crkU1@mid.uni-berlin.de>

special_dragonfly wrote:

> Hello,
> I'm having problems retrieving data I think I've put into my program. I
> have a class and a function. I'm reading in from a personally made text
> file of the data needed for the class. The FieldsDictionary needs to be
> accesable outside the function, but my problem is this:
> the print FieldsDictionary[key].Fieldname (which I should have just
> created because of the line above), returns:
> AttributeError: 'list' object has no attribute 'Fieldname'
> am I just accessing it wrongly?
> I was under the impression that Fields Dictionary should contain a key
> referencing to a list of instances of the class. i.e.
> FieldsDictionary{key:[instance1, instance2, instance 3]}
> Is this not what I've programmed?
> 
> class FieldClass(object):
>     def
>
__init__(self,Fieldname="",Fieldlength=0,Type=["A","S","N"],Location=["D","C","L","H","TBA"]):
>         self.Fieldname=Fieldname
>         self.Fieldlength=Fieldlength
>         self.Type=Type
>         self.Location=Location
> 
> def
>
EnterDictionary(FieldsDictionary,key,myfile,FIELD_QUANTITY_OFFSET,LINE_START,LINE_END):
>     data=myfile.readline().strip()
>     for i in range(int(data[FIELD_QUANTITY_OFFSET:])):
>         args =myfile.readline().strip()[LINE_START:LINE_END].split(",")
>         print args
>         FieldsDictionary.setdefault(key, []).append(FieldClass(*args))

Here you create a list or expect one, and append a new FieldClass-object to
it.
>         print FieldsDictionary[key].Fieldname

Here you access the LIST, but then expect it to be a FieldClass-object?!? 

print FieldsDictionary[key][-1].Fieldname

will work.

Diez


From kbk at shore.net  Sat Aug  4 01:26:32 2007
From: kbk at shore.net (Kurt B. Kaiser)
Date: Sat, 4 Aug 2007 01:26:32 -0400 (EDT)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200708040526.l745QWEW014541@hampton.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  404 open ( +5) /  3847 closed (+11) /  4251 total (+16)
Bugs    : 1059 open ( +3) /  6784 closed ( +8) /  7843 total (+11)
RFE     :  263 open ( +0) /   295 closed ( +1) /   558 total ( +1)

New / Reopened Patches
______________________

struni: Fix test_aepack by converting 4cc's to bytes  (2007-07-26)
CLOSED http://python.org/sf/1761465  reopened by  gvanrossum

distutils.util.get_platform() return value on 64bit Windows  (2007-07-27)
       http://python.org/sf/1761786  opened by  Mark Hammond

Some fix abount _WIN32_WINNT  (2007-07-27)
CLOSED http://python.org/sf/1761803  opened by  Hirokazu Yamamoto

struni: test_xml_etree.py  (2007-07-27)
CLOSED http://python.org/sf/1762412  opened by  Joe Gregorio

unable to serialize Infinity or NaN on ARM using marshal  (2007-07-28)
       http://python.org/sf/1762561  opened by  Matthias Klose

struni: test_urllib2, test_cookielib  (2007-07-29)
CLOSED http://python.org/sf/1762940  opened by  Joe Gregorio

socket close fixed  (2007-07-29)
CLOSED http://python.org/sf/1763387  opened by  Hasan Diwan

tiny addition to peephole optimizer  (2007-07-31)
       http://python.org/sf/1764087  opened by  Paul Pogonyshev

Fix for test_socketserver for Py3k  (2007-07-31)
CLOSED http://python.org/sf/1764815  opened by  ??PC??

generic and more efficient removal of unreachable code  (2007-08-01)
       http://python.org/sf/1764986  opened by  Paul Pogonyshev

logging: delay_fh option and configuration kwargs  (2007-08-01)
       http://python.org/sf/1765140  opened by  Chris Leary

small improvement for peephole conditional jump optimizer  (2007-08-01)
       http://python.org/sf/1765558  opened by  Paul Pogonyshev

urllib2-howto - correction  (2007-08-02)
       http://python.org/sf/1765839  opened by  O.R.Senthil Kumaran

improve xrange.__contains__  (2007-08-02)
       http://python.org/sf/1766304  opened by  Stargaming

Fix for test_zipimport  (2007-08-03)
CLOSED http://python.org/sf/1766592  opened by  ??PC??

Make xmlrpc use HTTP/1.1 and keepalive  (2007-08-04)
       http://python.org/sf/1767370  opened by  Donovan Baarda

test_csv struni fixes + unicode support in _csv  (2007-08-03)
       http://python.org/sf/1767398  opened by  Adam Hupp

Patches Closed
______________

struni: Fix test_aepack by converting 4cc's to bytes  (2007-07-26)
       http://python.org/sf/1761465  closed by  gvanrossum

struni: Fix test_aepack by converting 4cc's to bytes  (2007-07-26)
       http://python.org/sf/1761465  closed by  gvanrossum

Some fix abount _WIN32_WINNT  (2007-07-27)
       http://python.org/sf/1761803  closed by  mhammond

struni pulldom: Don't use 'types' to check strings  (2007-07-24)
       http://python.org/sf/1759922  closed by  gvanrossum

struni: test_xml_etree.py  (2007-07-27)
       http://python.org/sf/1762412  closed by  loewis

struni: test_urllib2, test_cookielib  (2007-07-28)
       http://python.org/sf/1762940  closed by  gvanrossum

socket close fixed  (2007-07-30)
       http://python.org/sf/1763387  closed by  facundobatista

itertools.getitem()  (2007-07-08)
       http://python.org/sf/1749857  closed by  rhettinger

Fix for test_socketserver for Py3k  (2007-07-31)
       http://python.org/sf/1764815  closed by  gvanrossum

Fix Decimal.sqrt bugs described in #1725899  (2007-06-22)
       http://python.org/sf/1741308  closed by  facundobatista

Fix for test_zipimport  (2007-08-03)
       http://python.org/sf/1766592  closed by  gvanrossum

urllib2 tests pass  (2007-07-16)
       http://python.org/sf/1755133  closed by  gvanrossum

New / Reopened Bugs
___________________

'exec' does not accept what 'open' returns  (2007-07-28)
       http://python.org/sf/1762972  opened by  Brett Cannon

S.find documentation uses s[start, end] vs. s[start:end]  (2007-07-29)
CLOSED http://python.org/sf/1763149  opened by  Rob

copy 2  (2007-07-30)
       http://python.org/sf/1764044  opened by  robs pythonid

_RLock.__repr__ throws exception  (2007-07-30)
CLOSED http://python.org/sf/1764059  opened by  Greg Kochanski

The -m switch does not use the builtin __main__ module  (2007-07-31)
       http://python.org/sf/1764407  opened by  Nick Coghlan

Decimal comparison with None fails in Windows  (2007-07-31)
CLOSED http://python.org/sf/1764761  opened by  pablohoffman.com

setup.py trashes LDFLAGS  (2007-08-01)
       http://python.org/sf/1765375  opened by  Harald Koenig

poll() returns "status code", not "return code"  (2007-08-02)
       http://python.org/sf/1766421  opened by  sjbrown

os.chmod failure  (2007-08-03)
       http://python.org/sf/1767242  reopened by  rgheck

os.chmod failure  (2007-08-03)
       http://python.org/sf/1767242  opened by  Richard Heck

String.capwords() does not capitalize first word  (2007-08-03)
       http://python.org/sf/1767363  opened by  Saatvik Agarwal

Bugs Closed
___________

No docs for list comparison  (2007-07-25)
       http://python.org/sf/1760423  closed by  gbrandl

SSL-ed sockets don't close correct?  (2004-06-24)
       http://python.org/sf/978833  closed by  loewis

incorrect return value of unicodedata.lookup() - beoynd BMP  (2007-04-21)
       http://python.org/sf/1704793  closed by  loewis

Thread.join() fails to release Lock on KeyboardInterrupt  (2005-03-26)
       http://python.org/sf/1171023  closed by  phansen

S.find documentation uses s[start, end] vs. s[start:end]  (2007-07-29)
       http://python.org/sf/1763149  closed by  gbrandl

_RLock.__repr__ throws exception  (2007-07-31)
       http://python.org/sf/1764059  closed by  ncoghlan

Decimal comparison with None fails in Windows  (2007-07-31)
       http://python.org/sf/1764761  closed by  facundobatista

decimal sqrt method doesn't use round-half-even  (2007-05-25)
       http://python.org/sf/1725899  closed by  facundobatista

New / Reopened RFE
__________________

add new bytecodes: JUMP_IF_{FALSE|TRUE}_AND_POP  (2007-07-31)
       http://python.org/sf/1764638  opened by  Paul Pogonyshev

RFE Closed
__________

add operator.fst and snd functions  (2007-05-27)
       http://python.org/sf/1726697  closed by  rhettinger



From Jiandong.Ge at gmail.com  Thu Aug  2 13:10:47 2007
From: Jiandong.Ge at gmail.com (JD)
Date: Thu, 02 Aug 2007 17:10:47 -0000
Subject: File access
In-Reply-To: <1186074042.024080.159420@e16g2000pri.googlegroups.com>
References: <1186072898.405831.105670@e16g2000pri.googlegroups.com>
	<1186074042.024080.159420@e16g2000pri.googlegroups.com>
Message-ID: <1186074647.074918.274820@z24g2000prh.googlegroups.com>

Thanks for answering,

No, the data was writing into the file when the subprocess was
runing.

For example, every second it will write something into the file.

I tried to run another python program aside and it sucessfully read
the file when the subprocess was runing.

JD

On Aug 2, 11:00 am, Adrian Petrescu <apetr... at uwaterloo.ca> wrote:
> On Aug 2, 12:41 pm, JD <Jiandong... at gmail.com> wrote:
>
>
>
> > Hi,
>
> > What I am trying to do is to run a subprocess on another machine using
> > subprocess.Popen, this subprocess contuinue writing something into a
> > file when it is runing.
>
> > After submit this subprocess, I tried to open the file and readlines()
> > in the loop (with a delay) in the loop) when the subprocess was
> > runing.
>
> > The problem is I could not get anything untill the subprocess
> > finished.
>
> > I also tried to run another python programm when the subprocess is
> > runing, I could get what I want.
>
> > Does anyone know why? Thanks!
>
> > JD
>
> Could the problem be that the subprocess only flushes the output
> buffer when it terminates, and so until the subprocess "finishes", as
> you say, the file is empty because the data is still in the buffer?
> Trying throwing some flushes into the code and see if it helps.
>
> Or am I misunderstanding your question?




From evan at yelp.com  Fri Aug 24 03:39:04 2007
From: evan at yelp.com (Evan Klitzke)
Date: Fri, 24 Aug 2007 00:39:04 -0700
Subject: Co-developers wanted: document markup language
In-Reply-To: <87odgyyx9u.fsf@wilson.homeunix.com>
References: <87odgyyx9u.fsf@wilson.homeunix.com>
Message-ID: <cfb58d850708240039i28f72d32k99692deb00b09e0b@mail.gmail.com>

On 8/23/07, Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
> Hall?chen!
>
> Some LaTeX users in Aachen thought about a general-use markup
> language this spring.  I wrote some code and a rough project
> description, however, we could need some help.
>
> If you are interested, visit the provisional project page at
> http://latex-bronger.sourceforge.net/gummi/
>
> Tsch?,
> Torsten.

I briefly looked over the specification, and it looks like you're
targeting a LaTeX backend. Are you planning on outputting to LaTeX and
using that to generate e.g. PDF versions of documents, or do you plan
to have a real PDF/Postscript backend?

-- 
Evan Klitzke <evan at yelp.com>

From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Aug 28 10:59:44 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 28 Aug 2007 16:59:44 +0200
Subject: Check for dict key existence, and modify it in one step.
In-Reply-To: <1188311810.226363.295500@w3g2000hsg.googlegroups.com>
References: <1188311810.226363.295500@w3g2000hsg.googlegroups.com>
Message-ID: <46d43860$0$428$426a74cc@news.free.fr>

rodrigo a ?crit :
> Im using this construct a lot:
> 
> if dict.has_key(whatever):

<ot>
Avoid using builtin names as identifiers (it shadows the builtin name).
</ot>

Unless you're using an old Python version, you'd be better using
   if whatever in my_dict:
     # do something here

>     dict[whatever] += delta
> else:
>     dict[whatever] = 1
> 
> sometimes even nested:
> 
> if dict.has_key(whatever):
>     if dict[whatever].has_key(someother):
>         dict[whatever][someother] += delta
>     else:
>         dict[whatever][someother] = 1
> else:
>     dict[whatever]={}
>     dict[whatever][someother] = 1
> 
> there must be a more compact, readable and less redundant way to do
> this, no?

There are other ways, yes. With Python <= 2.4.x, you can use 
dict.setdefault, with Python 2.5.x you can use a defaultdict (cf 
http://docs.python.org/whatsnew/modules.html).

HTH


From jeff at jmcneil.net  Mon Aug 13 06:49:26 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Mon, 13 Aug 2007 06:49:26 -0400
Subject: check if var is dict
In-Reply-To: <46C02BFA.10703@al.com.au>
References: <46C02BFA.10703@al.com.au>
Message-ID: <82d28c40708130349h47792d52kdd6e23e9522c05f3@mail.gmail.com>

You could use 'isinstance' to determine whether or not your object is
an instance of a particular class.

>>> isinstance({}, dict)
True
>>> isinstance("", basestring)
True
>>>

Note the use of 'basestring', which will catch unicode as well.

-Jeff

On 8/13/07, Astan Chee <stanc at al.com.au> wrote:
> Hi,
> I have a variable, I want to check if it is a dictionary or a string.
> Is there any better way to do this than I've done. How I did it is by
> doing a .items() and catching a AttributeError that it raises if its not
> a dictionary.
> How do i properly do it?
> Thanks
> Astan
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From python at jayloden.com  Fri Aug 10 11:43:33 2007
From: python at jayloden.com (Jay Loden)
Date: Fri, 10 Aug 2007 11:43:33 -0400
Subject: Issues of state
In-Reply-To: <f9hf22$kff$1@sea.gmane.org>
References: <op.tv98rva4wepdt4@ericb.pragmadev>	<7x8x8mpn37.fsf@ruckus.brouhaha.com>	<hblpo4-mgj.ln1@lairds.us>	<7xfy2t8l5n.fsf@ruckus.brouhaha.com>	<5uhro4-st8.ln1@lairds.us>	<f9f9mr$cch$1@sea.gmane.org>	<mailman.1800.1186676234.22759.python-list@python.org>	<5i2lk3F3m8h60U1@mid.individual.net>
	<f9hf22$kff$1@sea.gmane.org>
Message-ID: <46BC87A5.50405@jayloden.com>

Steve Holden wrote:
> greg wrote:
>> Jay Loden wrote:
>>> Like most things involving dynamic client side-javascript code and AJAX
>>> technology, it's a lot harder than you'd like it to be to solve the problem, but
>>> in cases where the Back button is really an issue, it's worth the effort.
>> So if you're willing to put in a huge amount of time,
>> effort and ingenuity, it's possible to overcome a
>> problem that only existed in the first place because
>> you chose an inappropriate technique for implementing
>> a user interface...
>>
> Exactly my point. Once you start to involve a complex framework to 
> handle state and interactions you see less and less advantage to 
> "desktop web" applications, since it's hard to match the directness and 
> simplicity of a native GUI.

This is true, you certainly won't get an argument from me! I've spent a lot of
time explaining to people why a real-time GUI and the HTTP protocol don't get
along. Event-driven programming using a request/response framework == square
peg, round hole. But, it seems like the benefits of a web-based GUI make for a
big hammer, so people keep pounding away at that square peg ;)

On the negative side, developing any sort of non-trivial web application is
fraught with problems:

  * language limitations of javascript/(X)HTML
  * highly varied implementations of CSS, HTML, js
  * browser-specific bugs (and features)
  * no real IDE to speak of
  * no way to receive events without some very ugly hacks or polling

However, there are also major benefits, which is why you see so many companies
and individuals jumping on the Web 2.0 train:

  * lower barrier of entry to creating a GUI (compare how quickly
    most people can turn out a form in HTML versus creating a GUI
    with the same entry fields)
  * cross-platform (yes, you have to support multiple browsers,
    but once you do, it works on the majority of platforms. For
    instance, support Firefox means OS X, Linux, Windows, etc all
    supported at once
  * Convenience for the end user - no need to install anything to
    use your software, which entices a lot more people to use it.
    This is less of a valid concern in an enterprise environment, but
    it still attracts people to feel they don't need to install
    something locally
  * available from multiple machines without extra effort for the user
  * Familiar interface (in most cases at least) to the user; more
    comfortable for them, less they need to learn.
  * Potentially available on many new platforms such as the iPhone,
    with some presentation tweaks. Good luck writing a cross-platform
    GUI app that runs on all the major OSes and mobile devices using a
    standard GUI toolkit etc. (or shipping the Python interpreter with
    an app intended for a Windows Mobile device, for instance)

Your point is absolutely valid, though. I think the web 2.0 craze has people
doing some things that just don't really make sense (like implementing Photoshop
in a browser - what's next, AutoCAD?). The bottom line is that there are many
many things that a native GUI is much better at and more than likely always will
be. If you're developing an application, it's important to stop and ask yourself
why it needs to be a web-based application, and unless you've got compelling
reasons, the native GUI should win out.

-Jay


From aisaac at american.edu  Thu Aug 30 17:29:59 2007
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 30 Aug 2007 21:29:59 GMT
Subject: create Powerpoint via com
In-Reply-To: <1188500822.869925.194430@e9g2000prf.googlegroups.com>
References: <j7EBi.13372$Yg.7724@trnddc02>
	<1188500822.869925.194430@e9g2000prf.googlegroups.com>
Message-ID: <rFGBi.998$ih.508@trnddc01>

kyosohma at gmail.com wrote:
> Hope that helps!

Yes indeed.
Thanks!
Alan


From wildemar at freakmail.de  Fri Aug 24 06:14:09 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Fri, 24 Aug 2007 12:14:09 +0200
Subject: Co-developers wanted: document markup language
In-Reply-To: <87mywh717i.fsf@wilson.homeunix.com>
References: <87odgyyx9u.fsf@wilson.homeunix.com>	<fakrtb$2ts$1@panix3.panix.com>
	<87tzqpew22.fsf@wilson.homeunix.com>	<fal3cv$bi2$1@panix3.panix.com>
	<87tzqp77my.fsf@wilson.homeunix.com>	<7xy7g1if24.fsf@ruckus.brouhaha.com>
	<87mywh717i.fsf@wilson.homeunix.com>
Message-ID: <46CEAF71.3050900@freakmail.de>

Torsten Bronger wrote:
> Hall?chen!
>
>   
Yes, you're German. Have you ever noticed that (we) Germans are 
virtually the only ones that feel the need to rub our nationality into 
everyones faces? ;)


> Paul Rubin writes
>   
>> TeX/LateX have been around forever and are well established
>> standards, as awful as they are.  Why do we want ANOTHER markup
>> language?
>>     
> Well, because they are awful.  ;-)  I don't see that there is a
> bunch of already existing projects, in fact, I don't see anyone
> challenging LaTeX at all.  However, competition is a good thing, and
> I think there are enough aspects about LaTeX that can be done better
> so that this project is worth being done.
>   
Well there is ConTeXt <URL:http://wiki.contextgarden.net/>. I've never 
actually used it, but from reading the docs I deem it a very attractive 
alternative to LaTeX.

/W


From slava.shklyar at gmail.com  Tue Aug 28 15:12:42 2007
From: slava.shklyar at gmail.com (Slava)
Date: Tue, 28 Aug 2007 19:12:42 -0000
Subject: Image manipulation
Message-ID: <1188328362.992426.275780@19g2000hsx.googlegroups.com>

I need to add dynamic text to animated GIF images.
What is a best way to do it?

Thanks.



From greg at cosc.canterbury.ac.nz  Fri Aug 10 05:14:23 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Fri, 10 Aug 2007 21:14:23 +1200
Subject: tempfile behavior
In-Reply-To: <5i1b15F3kuhitU3@mid.uni-berlin.de>
References: <1186683707.869668.316360@g4g2000hsf.googlegroups.com>	<1186684291.629191.185070@z24g2000prh.googlegroups.com>	<1186688830.051531.13560@z24g2000prh.googlegroups.com>
	<5i1b15F3kuhitU3@mid.uni-berlin.de>
Message-ID: <5i2oqkF3mpgh8U1@mid.individual.net>

Marc 'BlackJack' Rintsch wrote:
> File descriptors are integers.  It's a low level C thing.  Either use the
> low level functions in `os` or open the file with the `filename`.

In particular, os.fdopen(fd) will give you a
file object.

--
Greg


From ladynikon at gmail.com  Fri Aug  3 23:08:42 2007
From: ladynikon at gmail.com (Danyelle Gragsone)
Date: Fri, 3 Aug 2007 23:08:42 -0400
Subject: I am giving up perl because of assholes on clpm -- switching to
	Python
In-Reply-To: <46aa1986$0$31715$db0fefd9@news.zen.co.uk>
References: <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d@giganews.com>
	<f8b0gs$4rp$1@solaris.cc.vt.edu> <7x4pjq7v69.fsf@ruckus.brouhaha.com>
	<46aa1986$0$31715$db0fefd9@news.zen.co.uk>
Message-ID: <59f9c5160708032008o664def93jefa2186f1111ce2c@mail.gmail.com>

In most of the technical computer newsgroups which I frequent, there is
a handful of knowledgeable and helpful but irritable regulars, and often
one or two saints who contribute usefully, ignore rudeness and almost
never post off topic.



Ain't that the truth!!
You will find rudeness everywhere you go.  If you really like the
language.  Don't let party poopers spoil your fun.  Always demand
respect.  But if you don't get it.. it is not the end of the world.  I
have also learned that text has little emotion.  I have actually had
to pull some people aside as ask them about a post directed towards
me.


From mccredie at gmail.com  Fri Aug 10 16:52:32 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Fri, 10 Aug 2007 13:52:32 -0700
Subject: Fwd: AttributeError: 'module' object has no attribute 'HTTPSHandler'
In-Reply-To: <9e95df10708101153j74eb6431kd216503ab6c770ae@mail.gmail.com>
References: <e04d2e90708100957t79ed5a72s259281d912508fc1@mail.gmail.com>
	<9e95df10708101153j74eb6431kd216503ab6c770ae@mail.gmail.com>
Message-ID: <9e95df10708101352h45076f1cm36550126b1b548e3@mail.gmail.com>

> I built and installed python 2.5 from source and when I do this:
>
> opener = urllib2.build_opener(SmartRedirectHandler(),
> DefaultErrorHandler(), urllib2.HTTPSHandler())
>
> I get this error.
> AttributeError: 'module' object has no attribute 'HTTPSHandler'
>
> What should I do?


You need `_ssl.pyd' for HTTPSHandler to work. I guess, try to figure
out why that wasn't built, then build it. I suppose I _might_ be able
to give a little more help, but you haven't mentioned what platform
you are using. Even then, I'm not an expert on building Python.

Matt


From steve at REMOVE.THIS.cybersource.com.au  Fri Aug  3 10:24:24 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 04 Aug 2007 00:24:24 +1000
Subject: (no) fast boolean evaluation ?
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<cfb58d850708021619s298f69b9p3af86905d1695939@mail.gmail.com>
	<mailman.1551.1186099243.22759.python-list@python.org>
	<46b2e56b$0$18879$426a74cc@news.free.fr>
Message-ID: <pan.2007.08.03.14.24.23.227662@REMOVE.THIS.cybersource.com.au>

On Fri, 03 Aug 2007 10:20:59 +0200, Bruno Desthuilliers wrote:

> Joshua J. Kugler a ?crit :
>> On Thursday 02 August 2007 15:19, Evan Klitzke wrote:
>>>> I discovered that boolean evaluation in Python is done "fast"
>>>> (as soon as the condition is ok, the rest of the expression is ignored).
>>> This is standard behavior in every language I've ever encountered.
>> 
>> Then you've never programmed in VB (at least 6, don't know if .net still
>> does this).  Nested IF statements. AAAAAAAAAAAAAAAAAAAACK! 
> 
> I do remember an even brain-deadiest language that not only didn't 
> short-circuit boolean operators but also didn't have an "elif" statement...


Is it a secret?

I'm a little perplexed at why you say a language without "elif" is a good
sign of brain-death in a programming language. I understand that, given
the parsing rules of Python, it is better to use elif than the equivalent:

if condition:
    pass
else:
    if another_condition:
        pass


But that's specific to the syntax of the language. You could, if you
choose, design a language where elif was unnecessary:

if condition:
    pass
else if another_condition:
    pass

What advantage is there to "elif", apart from it needing three fewer
characters to type?



-- 
Steven.



From bj_666 at gmx.net  Thu Aug  9 16:16:38 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 9 Aug 2007 20:16:38 GMT
Subject: tempfile behavior
References: <1186683707.869668.316360@g4g2000hsf.googlegroups.com>
	<1186684291.629191.185070@z24g2000prh.googlegroups.com>
	<1186688830.051531.13560@z24g2000prh.googlegroups.com>
Message-ID: <5i1b15F3kuhitU3@mid.uni-berlin.de>

On Thu, 09 Aug 2007 12:47:10 -0700, billiejoex wrote:

>>>> fd, filename = tempfile.mkstemp()
>>>> type(fd)
> <type 'int'>
> 
> I would expect a file descriptor, not and integer.
> How do I have to use it?

File descriptors are integers.  It's a low level C thing.  Either use the
low level functions in `os` or open the file with the `filename`.

Ciao,
	Marc 'BlackJack' Rintsch


From hat at se-162.se.wtb.tue.nl  Thu Aug 16 02:47:57 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Thu, 16 Aug 2007 08:47:57 +0200
Subject: Who told str() to round my int()'s!!!
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
	<9qmvi.47364$s5.1537219@phobos.telenet-ops.be>
	<mailman.1857.1186861157.22759.python-list@python.org>
	<3ZudnUuJ68lcxl7bnZ2dnUVZ_t_inZ2d@comcast.com>
Message-ID: <slrnfc7sot.1aa.hat@se-162.se.wtb.tue.nl>

On 2007-08-15, Larry Bates <larry.bates at websafe.com> wrote:
>
> What are they teaching in schools these days?  I see questions like this and the
> equally perplexing "why don't floats represent numbers exactly?" or the mildy
> amusing "how do I write bytes not characters to a file" questions at least once
> a week on this forum.

Who says that schools teach that to every body?
Python is a popular language, so there are a lot non-cs people here. I can
imagine that eg a user with a background in history or geography has never
encountered these things before.
(Python got to start programming, and now they suddenly have to deal with
inaccurate floats of the otherwise so precise computer :-) )


Albert


From michele.petrazzo at TOGLIunipex.it  Wed Aug  1 13:48:09 2007
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Wed, 01 Aug 2007 19:48:09 +0200
Subject: Strange problems with subprocess
In-Reply-To: <1185973082.899736.247300@i13g2000prf.googlegroups.com>
References: <f8pc74$s2p$1@nnrp-beta.newsland.it>
	<1185973082.899736.247300@i13g2000prf.googlegroups.com>
Message-ID: <f8qh0p$ne9$1@nnrp-beta.newsland.it>

kyosohma at gmail.com wrote:
> This doesn't look like a complete traceback. It doesn't give what the
>  error was.
> 

Forgot a line, sorry!

exceptions.OSError: [Errno 4] Interrupted system call

> Mike
> 

Michele


From byte8bits at gmail.com  Mon Aug 13 13:00:42 2007
From: byte8bits at gmail.com (brad)
Date: Mon, 13 Aug 2007 13:00:42 -0400
Subject: Assignments and Variable Substitution
Message-ID: <f9q2qn$i4v$1@solaris.cc.vt.edu>

I'd like to do something like this:

var = '123'
%s = [], %var

So that, in the end, var is '123' and an empty list is named '123' as 
well. The list assignments are created during a loop.

Thanks,
Brad


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Aug 14 16:21:49 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 14 Aug 2007 22:21:49 +0200
Subject: wxPython before MainLoop
References: <13bl9a75laqcm70@corp.supernews.com>
	<13bnh5bs4b9h427@corp.supernews.com>
	<5i3b1jF3n5bdtU1@mid.individual.net>
	<13c1v79hs0dob3@corp.supernews.com>
Message-ID: <5ieh6uF3oc4jqU1@mid.individual.net>

[david] wrote:

> Well yes, I have tried this app with native windows,
> and I know how to do it.

Then I wonder why you complained about concurrency problems (solved
by using a worker thread, or using wx.Yield) in the first place.
Windows has the same solutions, just as about every GUI framework.

http://msdn2.microsoft.com/en-us/library/69644x60(VS.80).aspx
 
> But if all wxPython can offer is a poor imitation of MFC,

>From what did you conclude this? As already stated, almost ALL GUI
toolkits available function in a similar way (using an event loop).
To say that every such toolkit was just an imitation of MFC is
quite childish, IMHO. 

Same niveau would be to say that all other cars are poor imitations
of Ford cars because they all have four wheels.

> I'm better off using MFC aren't I? 

That depends on your demands. If you don't want it cross platform
you may be right, especially if you require very special Windows
features.

> And too all those people who wrote back to insist
> that users MUST explicitly build a multi-threaded
> framework for wxPython:

Could you please cite one posting where this is claimed? I can't
find this claim.

> It's supposed to already be a framework :~)

wxWidgets _has_ cross-platform threads implemented on its own:

http://www.wxwidgets.org/manuals/stable/wx_wxthread.html#wxthread

It has just been dropped from wxPython because cross-platform
threads are already part of the Python library. C++, the basis for
wxWidgets, has no multithreading support in STL.

Regards,


Bj?rn

-- 
BOFH excuse #61:

not approved by the FCC



From bdesth.quelquechose at free.quelquepart.fr  Mon Aug  6 02:26:49 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 06 Aug 2007 08:26:49 +0200
Subject: Adding a list of descriptors to a class
In-Reply-To: <1186503932.110835.293640@x40g2000prg.googlegroups.com>
References: <1186503932.110835.293640@x40g2000prg.googlegroups.com>
Message-ID: <46b8d2f3$0$25354$426a74cc@news.free.fr>

Bob B. a ?crit :
> I've been playing with descriptors lately.  I'm having one problem I
> can't seem to find the answer to.  I want to assign a descriptor to a
> list of attributes.  I know I should be able to add these somewhere in
> the class's __dict__, but I can't figure out where.  Here's some code:
> 
> class MyDesc(object):
>   def __init__(self, name=None, initVal=None):
>     self.name = name
>     self.value = initVal
> 
>   def __get__(self, obj, objtype):
>     // Do some stuff
>     self.value = "blah"
>     return self.value
> 
> class MyClass(object):
>   attributes = ('attr1', 'attr2')
>   for attr in attributes:
>     exec ("%s=MyDesc('%s')") % (attr, attr)
> 
>   // More stuff in the class
> 
> Ok, that "exec" is an ugly hack.  There's gotta be someway to plop
> this straight into the class's __dict__ without doing that, but when I
> try adding self.__class__.__dict__[attr] = MyDesc(attr) in MyClass's
> __init__ method, I get the error: "TypeError: 'dictproxy' object does
> not support item assignment"
> 
> Any ideas?

Steven already show you the simplest solution. Now if you want something 
"cleaner" (or at least more transparent to persons subclassing MyClass - 
which may or may not be a concern), you can use metaclasses too:

class MyDesc(object):
     def __init__(self, name=None, initVal=None):
         self.name = name
         self.value = initVal

     def __get__(self, obj, objtype):
         # Do some stuff
         #self.value = "blah"
         if obj is None:
             return self
         return self.value

class MyType(type):
     def __init__(cls, name, bases, dic):
         attributes = dic.get('attributes', None)
         if attributes is not None:
             for attrname, initval in attributes.iteritems():
                 setattr(cls, attrname, MyDesc(attrname, initval))

class MyClass(object):
     __metaclass__ = MyType
     attributes = dict(attr1="attr1", attr2="attr2")

class MySubclass(MyClass):
     # let you override parent's attributes...
     attributes = dict(attr1="otherattr1", attr3="a new one")


HTH


From almadhu at gmail.com  Sat Aug 11 23:59:54 2007
From: almadhu at gmail.com (Madhu Alagu)
Date: Sun, 12 Aug 2007 03:59:54 -0000
Subject: Web based Reporting tool for Python
In-Reply-To: <2007080808575016807-jon@turnthepageorg>
References: <1186460956.945148.162610@k79g2000hse.googlegroups.com>
	<mailman.1722.1186522221.22759.python-list@python.org>
	<1186547726.383996.291360@d55g2000hsg.googlegroups.com>
	<2007080808575016807-jon@turnthepageorg>
Message-ID: <1186891194.582444.222010@r34g2000hsd.googlegroups.com>

On Aug 8, 4:57 pm, Jon Rosebaugh <j... at turnthepage.org> wrote:
> On 2007-08-07 23:35:26 -0500, Madhu Alagu <alma... at gmail.com> said:
>
> > Thanking so much for all the informations and links.I would like to
> > use Mako Templates(www.makotemplates.org).Ilike to use simple and
> > python default module...
>
> Mako is an excellent template system, but you'll have a lot of work to
> do making it into a reporting system.



Any reporting template in python ?



From horpner at yahoo.com  Thu Aug 16 11:59:33 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 16 Aug 2007 15:59:33 GMT
Subject: A problem with Time
References: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
	<mailman.2064.1187278991.22759.python-list@python.org>
Message-ID: <slrnfc8t4g.1hg.horpner@FIAD06.norwich.edu>

On 2007-08-16, Shawn Milochik <Shawn at Milochik.com> wrote:
> import time
>
>
> oneDay = 60 * 60 * 24 #seconds in one day
>
> date = time.time()
>
> yesterday = date - oneDay

Or use a timedelta.

>>> import datetime
>>> yesterday = datetime.datetime.today() - datetime.timedelta(days=1)
>>> yesterday.strftime('%m%d%Y')
'08152007'

-- 
Neil Cerutti
It might take a season, it might take half a season, it might take a year.
--Elgin Baylor


From http  Wed Aug  8 02:17:00 2007
From: http (Paul Rubin)
Date: 07 Aug 2007 23:17:00 -0700
Subject: Issues of state (was: Tkinter or wxpython?)
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1680.1186416061.22759.python-list@python.org>
	<7x3aywr4tc.fsf@ruckus.brouhaha.com>
	<mailman.1684.1186422197.22759.python-list@python.org>
	<gg9mo4-p2m.ln1@lairds.us>
Message-ID: <7x8x8mpn37.fsf@ruckus.brouhaha.com>

claird at lairds.us (Cameron Laird) writes:
> >application in the web app model (I haven't even touched on the whole
> >stateless HTTP being mapped to a stateful environment issue, or the
> >need to manage the local web server) actually buys you anything. I
> 			.
> Go ahead:  touch on statefulness.  I've been pondering the topic
> lately, and wonder what's new on the subject.  I find it plenty
> difficult to cast this as anything but a big liability for the
> Web app team.

I'm not sure what you're getting at in this context.  You can write a
desktop app where the window system communicates with a gui toolkit
through a socket (at least that's how X windows works), or you can
write a web app where a browser communicates with an http listener
through a socket.  What's the difference, as far as application state
is concerned?  

I haven't used wxpython but for tkinter you'd typically have a gui
event loop in its own thread, communicating with the application
through queues.  Similarly you can use BaseHTTPServer to collect
browser hits and get the data out of them with the cgi module
functions before passing them to the app.  If you want to handle
multiple concurrent users you get into the usual issues of web
servers, but if you're just doing a single user web implementation as
an alternative to a desktop gui, some rudimentary locking is probably
enough to stop accidental simultaneous connections.

If the application is simple enough, you can just write it as a cgi
and keep the state in disk files.


From askme at ask.me  Wed Aug  8 18:34:14 2007
From: askme at ask.me (Bill Sornson)
Date: Wed, 8 Aug 2007 15:34:14 -0700
Subject: Google Conspiracy Revealed!
References: <1186600125.435154.68910@m37g2000prh.googlegroups.com>
Message-ID: <46ba44e6$0$28622$4c368faf@roadrunner.com>

conspiracy.black3 at gmail.com wrote:
> http://www.nasaconspiracy.net/2007/06/content-generator-recognizing-generated.html
> - Amazing Google Conspiracies Revealed from CIA, NSA and Government
> conspiracies and Dr.Kevorkians magic pills.

Ironically, forwarded to Gmail Abuse -- E-mail Address(es): 
abuse at gmail.com.

Tasty...





From http  Thu Aug 16 04:37:22 2007
From: http (Paul Rubin)
Date: 16 Aug 2007 01:37:22 -0700
Subject: python socket usage
References: <mailman.2046.1187250159.22759.python-list@python.org>
	<1187250839.541105.60900@r29g2000hsg.googlegroups.com>
	<mailman.2047.1187252483.22759.python-list@python.org>
Message-ID: <7xabsrnad9.fsf@ruckus.brouhaha.com>

Gary Herron <gherron at islandtraining.com> writes:
> be able to recover the original object accurately.  Worse yet, an eval
> of an arbitrary string is a HUGE security hole.
> 
> If you really want to send any Python object through a socket, look up
> the Pickle and cPickle modules.

These are also security holes.


From SMERSH009X at gmail.com  Sat Aug  4 19:35:55 2007
From: SMERSH009X at gmail.com (SMERSH009)
Date: Sat, 04 Aug 2007 23:35:55 -0000
Subject: Formatting Results so that They Can be Nicely Imported into a
	Spreadsheet.
Message-ID: <1186270555.514649.311280@d30g2000prg.googlegroups.com>

Hi All.
Let's say I have some badly formatted text called doc:


doc=
"""
friendid
Female

			    23 years old

			    Los Gatos

			    United States
friendid
Male

			    24 years old

			    San Francisco, California

			    United States
"""

How would I get these results to be displayed in a format similar to:
friendid;Female;23 years old;Los Gatos;United States
friendid;Male; 24 years old;San Francisco, California;United States


The latter is a lot easier to organize and can be quickly imported
into Excel's column format.

Thanks Much,
Sam



From zyzhu2000 at gmail.com  Thu Aug 16 20:53:19 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Fri, 17 Aug 2007 00:53:19 -0000
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <fa2m4s$k1g$1@daisy.noc.ucla.edu>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<fa2m4s$k1g$1@daisy.noc.ucla.edu>
Message-ID: <1187311999.880853.135780@j4g2000prf.googlegroups.com>

On Aug 16, 6:21 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> beginner wrote:
> > Hi All.
>
> > I'd like to do the following in more succint code:
>
> > if k in b:
> >     a=b[k]
> > else:
> >     a={}
> >     b[k]=a
>
> > a['A']=1
>
> > In perl it is just one line: $a=$b->{"A"} ||={}.
>
> I'm afraid you've asked a non sequiter:
>
> euler 40% cat test.pl
>
> $a=$b->{"A"} ||={} ;
> print "$a\n" ;
>
> $b->{"B"} = 0 ;
> $a=$b->{"B"} ||={} ;
> print "$a\n" ;
>
> $b->{"X"} = 15 ;
> $a=$b->{"X"} ||={} ;
> print "$a\n" ;
>
> euler 41% perl test.pl
> HASH(0x92662a0)
> HASH(0x926609c)
> 15
>
> James
>
> --
> James Stroud
> UCLA-DOE Institute for Genomics and Proteomics
> Box 951570
> Los Angeles, CA 90095
>
> http://www.jamesstroud.com/


It is not supposed to be used this way.
$b is supposed to be a hash-table of hash-table. If a key exists in
$b, it points to another hash table. The $a=$b->{"A"} ||={} pattern is
useful when you want to add records to the double hash table.

For example, if you have a series of records in the format of (K1, K2,
V), and you want to add them to the double hash-table, you can do
$a=$b->{K1} || ={}
$a->{K2}=V




From conra2004 at yahoo.com  Tue Aug 14 12:05:13 2007
From: conra2004 at yahoo.com (yadin)
Date: Tue, 14 Aug 2007 09:05:13 -0700
Subject: negative values on polar plot (decibels polar plots )
Message-ID: <1187107513.354637.228830@w3g2000hsg.googlegroups.com>


hi every one can you please
can you help me to fix these polar plot in db's
so that the center is at the minimun negative number in voltagedb
about [-50]
and the maximun is at zero
how can i see values on the axies like showing that the axes start at
-40 -30 .....0
than you


import wx
import os
from wx.lib.colourdb import *
from pylab import*
angteta =  [ 4.36332313e-003, 3.18522588e-001, 6.32681854e-001,
9.46841119e-001,
             1.26100038e+000, 1.57515965e+000, 1.88931892e+000,
2.20347818e+000,
             2.51763745e+000, 2.83179671e+000, 3.14595598e+000,
3.46011524e+000,
             3.77427451e+000, 4.08843377e+000, 4.40259304e+000,
4.71675230e+000,
             5.03091157e+000, 5.34507083e+000, 5.65923010e+000,
5.97338936e+000,]

voltage =  [ 0.00363471, 0.26569155, 0.52562334, 0.76330428,
0.93673361, 1.        ,
             0.93321713, 0.75733232, 0.5185449 , 0.25840091,
0.00363471, 0.26569155,
             0.52562334, 0.76330428, 0.93673361, 1.        ,
0.93321713, 0.75733232,
             0.5185449 , 0.25840091,]

#voltagedb = 20*log10(voltage)


voltagedb =  [-48.7906044 ,-11.51244516, -5.58650713, -2.34604603,
-0.56767793,  0.        ,
              -0.60034598, -2.41427014,
-5.7042726 ,-11.75411924,-48.7906044 ,
              -11.51244516, -5.58650713, -2.34604603, -0.56767793,
0.        ,
              -0.60034598, -2.41427014, -5.7042726 ,-11.75411924,]
polar(angteta,voltagedb)

show()



From gtcopeland at gmail.com  Tue Aug 21 09:09:12 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: Tue, 21 Aug 2007 06:09:12 -0700
Subject: Python project solicitation
In-Reply-To: <mailman.41.1187663747.32294.python-list@python.org>
References: <mailman.41.1187663747.32294.python-list@python.org>
Message-ID: <1187701752.661991.144690@q3g2000prf.googlegroups.com>


On Aug 20, 9:35 pm, JoeSox <joe... at gmail.com> wrote:
> I must say this thing is pretty cool.  I had a coworker try it out and
> he ran into problems getting it to run on his Linux OS.  So I am
> really looking for some non-Windows developers to take a look at it.
> All of the info is at the project site above.
> Thanks.
>

I looked at it real quick.  You need to use os.path.join for your file
paths.  You also need to use sys.platform for windows specific
processing.  For example:

if sys.platform == 'Win32':
   FS_ROOT = 'C:'
else:
   FS_ROOT = '/'

WORDNETPATH=os.path.join( FS_ROOT, 'WordNet', '2.1', 'dict' )

So on and so on.  You wrote it very MSWin centric so it is not a
surprise it has trouble of on other platforms.  All of your file
references need to be adjusted as above using os.path.join.

Keep in mind I only looked at it real quick.  Those appear to be the
cross platform deal killers.  Short of something I missed (could
have), it should work find on most any other platform once you take
out the Windows-isms.


Greg



From gslindstrom at gmail.com  Wed Aug 15 08:03:11 2007
From: gslindstrom at gmail.com (Greg Lindstrom)
Date: Wed, 15 Aug 2007 07:03:11 -0500
Subject: PyCon 2008 - Call for Tutorial Ideas
Message-ID: <a9f39a410708150503n40999879j29745161ac8af9af@mail.gmail.com>

It's hard to believe, but the planning for PyCon 2008 is underway.  PyCon,
an annual gathering of Python enthusiasts -- nearly 600 in Dallas last year
-- will be held in Chicago next March 14-16, with one full "pre-conference"
day, March 13, set aside for tutorials; classes given by Python honchos on
various topics.  These sessions last 3 hours (plus a break) and in general
are more detailed than the talks given during the actual conference.  Right
now, we need to know what YOU want to see covered in these sessions.
 Testing, GUI, web-apps, database, basic Python, advanced Python, objects,
anything and everything Python is on the table at this point.  We have to
narrow the field down to 10 or 15 and then find qualified presenters, so now
is the time to start gathering ideas.

What tutorials would you like to see offered?  Please response to:
pycon-tutorials at python.org

Thanks,

Greg Lindstrom
Tutorial Coordinator, PyCon 2008
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From rcdailey at gmail.com  Mon Aug 20 17:01:12 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 20 Aug 2007 16:01:12 -0500
Subject: datetime in microseconds
In-Reply-To: <1187621922.387688.77090@50g2000hsm.googlegroups.com>
References: <1187610776.755796.170990@r29g2000hsg.googlegroups.com>
	<1187615746.655162.295570@z24g2000prh.googlegroups.com>
	<1187619423.715120.293660@o80g2000hse.googlegroups.com>
	<1187621922.387688.77090@50g2000hsm.googlegroups.com>
Message-ID: <496954360708201401p2ffcc37fjc24aabfb95224ec2@mail.gmail.com>

A small off topic question. Why use divmod() instead of the modulus
operator?

On 8/20/07, mroeloffs at gmail.com <mroeloffs at gmail.com> wrote:
>
> On Aug 20, 4:17 pm, mroelo... at gmail.com wrote:
> > On Aug 20, 3:15 pm, John Machin <sjmac... at lexicon.net> wrote:
> >
> >
> >
> > > On Aug 20, 9:52 pm, mroelo... at gmail.com wrote:
> >
> > > > Hi I have a time in microseconds, for example 0x8C905CBA7F84AF4. I
> > > > want this to a normal view in hh:mm:ss DD:MM:YYYY. I tried with
> > > > datetime, but it only takes a max of 1000000 microseconds is there
> > > > another solution?
> >
> > > Your question can be interpreted in two possible ways:
> >
> > > 1. You have an interval or duration (independent of a calendar point)
> > > and you want to express it in years, months, days, hours, etc. This is
> > > not possible, due to the variable number of days in a month. The best
> > > that you can do is express it as days, hours, etc.
> >
> > > >>> microsecs = 0x8C905CBA7F84AF4
> > > >>> secs = microsecs // 1000000 # or round to nearest if you prefer
> > > >>> mins, secs = divmod(secs, 60)
> > > >>> hrs, mins = divmod(mins, 60)
> > > >>> days, hrs = divmod(hrs, 24)
> > > >>> days, hrs, mins, secs
> >
> > > (7326893L, 11L, 1L, 16L)
> >
> > > 2. You want to know the (Gregorian) calendar point that is
> > > 0x8C905CBA7F84AF4 microseconds after some epoch. In this case you need
> > > to specify what the epoch is. Then you can try something like:
> >
> > > >>> datetime.datetime.fromordinal(1) + datetime.timedelta
> (microseconds=microsecs
> >
> > > )
> > > Traceback (most recent call last):
> > >   File "<stdin>", line 1, in <module>
> > > OverflowError: date value out of range
> >
> > > >>> # Whoops!
> > > >>> years_approx = days / 365.25
> > > >>> years_approx
> > > 20059.939767282682
> >
> > > Hmmm, one of us seems to be missing something ...
> >
> > Sorry,  sorry, sorry it was the wrong value, it should be
> > 0xE0E6FAC3FF3AB2.
>
> The solution I made, with thanks to John. Maybe someone a better one??
>     def DecodeDateTime(self,dateTime):
>         dateTime = self.Rotate(dateTime)
>         microsecs = int(hexlify(dateTime),16)
>         microsecs -= 31536000000000           # -1 Year
>         microsecs -= 1123200000000            # -13 Days (magic?)
>         secs = microsecs // 1000000
>         mins, secs = divmod(secs, 60)
>         hrs, mins = divmod(mins, 60)
>         days, hrs = divmod(hrs, 24)
>         timed = datetime.datetime.fromordinal(1) +
> datetime.timedelta(days)
>         return "%02d-%02d-%02d %02d:%02d:%02d"%(timed.day,
> timed.month, timed.year, hrs, mins, secs)
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From cool.vimalsmail at gmail.com  Thu Aug  2 05:31:43 2007
From: cool.vimalsmail at gmail.com (cool.vimalsmail at gmail.com)
Date: Thu, 02 Aug 2007 09:31:43 -0000
Subject: i am new to python-Please somebody help
Message-ID: <1186047103.673871.150460@z24g2000prh.googlegroups.com>

i dont know how to convert a txt file into a zip file

(i.e.,)i have a file named packages and i want the packages file with
a ".gz" extension by implementing a python program



From http  Mon Aug 20 11:18:03 2007
From: http (Paul Rubin)
Date: 20 Aug 2007 08:18:03 -0700
Subject: clarification
References: <aa405c1f0708162332t7b6dbdd6o2cc0f512dc821d7b@mail.gmail.com>
	<mailman.2107.1187350363.22759.python-list@python.org>
	<fa41k8$10n$1@news2.u-psud.fr> <13cb7frnqs8f6d9@corp.supernews.com>
	<CSsxi.28081$RX.11328@newssvr11.news.prodigy.net>
	<CTDxi.6299$4w7.2405@newssvr22.news.prodigy.net>
	<1i31aop.2ing3h1hcfz0dN%aleax@mac.com>
	<vkWxi.28393$RX.16912@newssvr11.news.prodigy.net>
	<1i332et.1rcnw4e1f97a5kN%aleax@mac.com>
Message-ID: <7xk5rq9qvo.fsf@ruckus.brouhaha.com>

aleax at mac.com (Alex Martelli) writes:
> > turn indicates that both implementations actually work about same and
> > your "O(n squared)" argument is irrelevant.
> 
> It's indeed irrelevant when the behavior _isn't_ quadratic (as in the
> case of intersections) -- but unfortunately it _is_ needlessly quadratic
> in most interesting cases involving containers (catenation of sequences,
> union of sets, merging of dictionaries, merging of priority-queues,
> ...), because in those cases the intermediate temporary values tend to
> grow, as I tried to explain in more detail above.

Mostly directed to samwyse: Alex is correct here and I'd add that
Python and its libraries are written for an imperative, mutating
approach though there are some situations in which you can write in
functional style without a big efficiency hit.  In particular, the
quadratic behavior Alex points out is because of Python's hash-based
implementation of sets, so you can't make a new set that adds or
removes one element from the old set, without copying all the elements
around.

A more purist functional approach would probably implement sets with
some other data structure such as AVL trees, so you can make a new one
that adds or deletes some node in O(log n) time (it would share almost
all of its structure with the old one).  So instead of O(n) for the
hash-based mutating implementation or O(n**2) for the hash/copying
based functional implementation, you get O(n log n) for the functional
tree implementation.  Haskell's Data.Map module does something like
this.  There's a book "Purely Functional Data Structures" by Chris
Okasaki that shows how to implement dicts, priority queues, and
fancier objects in functional style based on similar principles.

If you want to try out functional programming in a lightweight
language (much easier to grok than Haskell) you might look at Hedgehog Lisp:

   http://hedgehog.oliotalo.fi/

It includes a functional dictionary implementation based on AVL trees
but with a Python dictionary-like API.


From llasram at gmail.com  Thu Aug 30 09:53:53 2007
From: llasram at gmail.com (Marshall T. Vandegrift)
Date: Thu, 30 Aug 2007 09:53:53 -0400
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
Message-ID: <87bqcp2kni.fsf@seneca.iss.local>

zzbbaadd at aol.com writes:

> What's with the index() function of lists throwing an exception on not
> found? Let's hope this is rectified in Python 3. If nothing else, add
> a function that doesn't throw an exception. There are a million
> situations where you can have an item not be in a list and it is not
> an exception situation.

The Python string types have both the method `index()` which throws an
exception and the method `find()` which implements the same behavior but
returns -1 for not-found substrings.  I would naively have assumed the
`list` type to provide both as well, but it provides only `index()`.

Anyone know the reason for this lack of parallelism?

-Marshall



From gherron at islandtraining.com  Sun Aug 19 13:10:07 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 19 Aug 2007 10:10:07 -0700
Subject: "Variable variable name" or "variable lvalue"
In-Reply-To: <1187541583.607550.107230@57g2000hsv.googlegroups.com>
References: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
	<1187541583.607550.107230@57g2000hsv.googlegroups.com>
Message-ID: <46C8796F.8090505@islandtraining.com>

inmmike at gmail.com wrote:
> On Aug 15, 1:42 pm, mfglinux <mfgli... at gmail.com> wrote:
>   
>> Hello to everybody
>>
>> I would like to know how to declare in python a "variable name" that
>> it is in turn a variable
>> In bash shell I would wrote sthg like:
>>
>> for x in `seq 1 3`
>> do
>>   M$i=Material(x)  #Material is a python class
>> done
>>
>> Why I need this? Cause I have a python module that obliges me to build
>> a variable called Period, which should have a variable name of
>> summands (depends on the value of x)
>>
>> #Let's say x=3, then Period definition is
>> Period=Slab(Material1(12.5)+Material2(25)+Material3(12.5)) #Slab is a
>> python class
>>
>> I dont know how to automatize last piece of code for any x
>>
>> thank you
>>
>> Marcos
>>     
>
> Regardless of whether or not this is a "best practice" sometimes it is
> necessary. For example, I am looping through a dictionary to set some
> class properties. Anyway, here is what I finally came up with:
>
> exec "self.%s = '%s'" % (item, plist[item])
>   
Yuck!  Not at all necessary.  Use setattr instead:

   setattr(self, item, plist[item])

That's much cleaner then an exec or eval.  You may also find getattr and
hasattr useful.

Gary Herron



> A more simple example for setting a variable outside of a class...
>
> exec '%s = '%s'" % ('variableName', 'variable value')
>
> Cheers!
> Mike
>
>   



From kevin.t.ryan at gmail.com  Tue Aug 28 14:09:58 2007
From: kevin.t.ryan at gmail.com (Kevin T. Ryan)
Date: Tue, 28 Aug 2007 18:09:58 -0000
Subject: Compiling Source with alternate Openssl lib
Message-ID: <1188324598.687927.169350@d55g2000hsg.googlegroups.com>

Hi All -

I'm trying to compile Python on a Centos machine (RHEL) 3.8 for a
hosting account that I just set up and I'm having 2 issues:

1.  I ran into an issue with the "hashlib" module [I think] because it
bumps it up against an *OLD* openssl lib (like, Feb. 2003).  So I
installed a newer openssl lib, but when I recompiled python it still
used the old library.  So I tried ./configure again with the flag: "-
with-openssl-libs=/new/directory" but it still didn't work.  Any idea
how I might be able to remedy this?  I have a working solution right
now: I've commented out the last 2 lines of hashlib.py, but I'd rather
not do that if I didn't have to.

2.  As part of this process, I installed "easy_install" and I was
trying to download psycopg2 but I got the error: "PyDateTimeAPI
defined but not used" when trying to compile.  I've had this problem
before when trying to compile psycopg2 and it was because I didn't
have the postgres header libs installed (libpq-dev) ... but that's on
a debian box, and I can't figure out how to fix it on the RHEL one.

I know the 2nd question might not belong in this group, but I thought
I'd ask just in case someone ran into this before or might have any
suggestions.

Thanks in advance (as always!) for your help!

Kevin



From ldo at geek-central.gen.new_zealand  Mon Aug 27 05:27:56 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 27 Aug 2007 21:27:56 +1200
Subject: pySerial in a daemon process
References: <1188158581.316824.89360@k79g2000hse.googlegroups.com>
	<5je954F3s0nilU1@mid.individual.net>
	<1188166098.738058.182580@w3g2000hsg.googlegroups.com>
Message-ID: <fau5a8$mg9$4@lust.ihug.co.nz>

In message <1188166098.738058.182580 at w3g2000hsg.googlegroups.com>, paul
wrote:

> Before I had posted this question first thing I did was to look at /
> dev/ttyS0, and indeed the group is dialout (gid=20)...

What are the full protections on the serial port? That is, can you post the
output of

    ls -l /dev/ttyS0

please?



From semanticist at gmail.com  Wed Aug 15 10:35:16 2007
From: semanticist at gmail.com (Miles)
Date: Wed, 15 Aug 2007 10:35:16 -0400
Subject: What order does info get returned in by os.listdir()
In-Reply-To: <gemini.jmthof006bdd602a4@omba.demon.invalid>
References: <gemini.jms7ay00fafcf00k8@jernic.by.invalid>
	<gemini.jmtc5f0021tj002a4@omba.demon.invalid>
	<5igd1gF3mc1akU1@mid.uni-berlin.de>
	<gemini.jmthof006bdd602a4@omba.demon.invalid>
Message-ID: <a49e45f50708150735x78771584s3cdcc13b191d3a37@mail.gmail.com>

On 8/15/07, Jeremy C B Nicoll wrote:
> Marc 'BlackJack' Rintsch wrote:
> > > How would I sort leaflist in a way that mimics the sort order that XP
> > > shows me things under?
> >
> > This depends on what XP is.  Which program?  Which locale?  How does the
> > locale influence that programs sorting?
>
> Well... XP is Windows XP (Pro as I think I said earlier), and I'm in the UK.
> I explained earlier how XP shows me stuff in order when I tell it to sort by
> name.

Case insensitive sort with ~ coming before all other characters:
some_list.sort(key=lambda k: k.lower().split("~"))


From arkanes at gmail.com  Wed Aug  1 10:40:28 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 1 Aug 2007 09:40:28 -0500
Subject: zip() function troubles
In-Reply-To: <7xps28s5wm.fsf@ruckus.brouhaha.com>
References: <1185492336.850090.279190@b79g2000hse.googlegroups.com>
	<f8bvik$vvp$03$1@news.t-online.com>
	<7xfy3ae4lb.fsf@ruckus.brouhaha.com>
	<mailman.1251.1185552135.22759.python-list@python.org>
	<7xps28s5wm.fsf@ruckus.brouhaha.com>
Message-ID: <4866bea60708010740l1d005751h38564463d30d9dd3@mail.gmail.com>

On 31 Jul 2007 12:57:13 -0700, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> "Chris Mellon" <arkanes at gmail.com> writes:
> > Better hand in your computer, then. You're never going to find a
> > situation where the environment won't affect the running time of your
> > algorithms.
>
> The environment may affect the running time by an additive or linear
> multiplicative constant but it should never turn an O(n) algorithm
> into an O(n**2) one.
>

Hardly true. When you start to factor real world issues like memory
allocations (and all the complexities thereof) and cache misses into
algorithmic performance an algorithm certainly can change from O(n) to
O(n**2). This is one reason why real world performance is tested and
compared using benchmarks and not Big O notation.

> > For the record, the python GC is generational. This is a case of a
> > default heuristic giving pathological behavior in a corner case, not
> > anything broken about the design of the python GC.
>
> No, it is broken, per discussion on a
> comp.compilers/comp.lang.functional thread this week.  The notion of
> using a generational collector was to collect less and less frequently
> for older and older generations (e.g. doubling the amount of
> allocation between generations) but the usual solution is apparently
> to increase the heap size by some multiplicative factor when GC fails
> to free enough memory.
> --

The issue at hand has nothing to do with the generational nature of
the Python GC. It's caused by a heuristic that aggressively attempts
to reclaim objects when there are large numbers of allocations without
releases. This is a tuneable GC parameter.


From kalita at poczta.onet.pl  Fri Aug 17 18:27:06 2007
From: kalita at poczta.onet.pl (Marcin Kalicinski)
Date: Fri, 17 Aug 2007 23:27:06 +0100
Subject: wxPython in C++ app using wxWidgets
Message-ID: <rIidnU2tiqY8vVvbnZ2dnUVZ8ternZ2d@eclipse.net.uk>

I have an application written in C++ that uses wxWidgets for GUI. I use 
embedded Python for scripting inside of this application. I want to use 
wxPython to add GUI to my scripts - because my C++ App uses wxWidgets I 
thought it to be easy. The problem is that wxPython knows nothing about 
wxApp/wxFrame objects created in my C++ application, and insists (by giving 
me asserts) that I create another wxApp object for wxPython inside my 
scripts. Obviously, this is not what I want. I want the scripts to use the 
same wxApp/wxFrame object that my C++ application already created. More 
specifically, I want to create dialogs in wxPython that will have my 
application wxFrame as parent.

I'm stuck. Any help appreciated.

Thanks,
M.




From jcarlson at uci.edu  Sun Aug 26 12:25:35 2007
From: jcarlson at uci.edu (Josiah Carlson)
Date: Sun, 26 Aug 2007 09:25:35 -0700
Subject: ANN: PyPE 2.8.6
Message-ID: <20070826092322.850A.JCARLSON@uci.edu>


=== What is PyPE? ===
PyPE (Python Programmers' Editor) was written in order to offer a
lightweight but powerful editor for those who think emacs is too much
and idle is too little. Syntax highlighting is included out of the box,
as is multiple open documents via tabs.

Beyond the basic functionality, PyPE offers an expandable source tree,
filesystem browser, draggable document list, todo list, filterable
function list, find and replace bars (no dialog to find or replace simple
strings), recordable and programmable macros, spell checker,
reconfigurable menu hotkeys, triggers, find in files, external process
shells, and much more.

=== More Information ===

If you would like more information about PyPE, including screenshots,
where to download the source or windows binaries, bug tracker, contact
information, or a somewhat complete listing of PyPE's features, visit
PyPE's home on the web:

    http://pype.sf.net/index.shtml

If you have any questions about PyPE, please contact me, Josiah Carlson,
aka the author of PyPE, at jcarlson at uci.edu (remember to include
"PyPE" in the subject).


PyPE 2.8.6 includes the following changes and bugfixes since release
2.8.5:

(fixed) a bug with "Wrap Try/Except" as per emailed bug report from Ian York.
(added) ability to choose what port PyPE will listen on via --port= .
(fixed) workspaces in wxPython 2.8+, patch thanks to Craig Mahaney.
(added) explicit exclude dirs for find in files, patch thanks to Craig Mahaney.
(added) paste and down mechanism to paste and move the cursor down, patch
thanks to Craig Mahaney.
(added) delete right mechanism to delete everything from the cursor to the end
of the line, patch thanks to Craig Mahaney.
(added) delete line mechanism to delete the current line, patch thanks to
Craig Mahaney.
(added) paste rectangle command for rectangular pasting, patch thanks to Craig
Mahaney.
(fixed) support for alternate background colors thanks to bug report from
Craig Mahaney.
(added) macro support to Craig Mahaney's added functionality.
(added) implementation for regular expression replacements, possibly to be
integrated as part of a 'replace in all open documents' in the future.
(added) automatic spellcheck for text and tex documents of up to 200,000 byes
in size.  Will only spellcheck if the user has enabled "check syntax" in the
"Realtime Options".
(fixed) issue when trying to save language settings when cursor position is
not to be saved.
(added) support for \chapter section delimiter in *tex files.
(fixed) issue that prevented the highest level source listing from being
sorted in the Name and Line sorted source trees.
(changed) rather than reading and executing a file for configuration loading,
we now use a variant of the 'unrepr()' mechanism with support for True/False.
(changed) find/replace bar now uses variant of 'unrepr()' rather than the
compiler module directly.
(changed) moved parsers.py to plugins and stopped using import * to get its
contents.



From uymqlp502 at sneakemail.com  Thu Aug 30 21:26:29 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Thu, 30 Aug 2007 18:26:29 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <46d76595$0$4013$426a74cc@news.free.fr>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
Message-ID: <1188523589.736146.263510@l22g2000prc.googlegroups.com>


> FWIW, the "Eiffel and SPARK Ada folks" also "brilliantly explained" why
> one can not hope to "write reliable programs" without strict static
> declarative type-checking.

And they are probably right.

I don't think you understand what they mean by "reliable
programs." Any idea how much Python is used for flight control systems
in commercial
transport aircraft or jet fighters? How about ballistic missile launch
and guidance systems?
Any idea why?

For the record, I think that DBS could possibly make Python more
suitable for *some*
mission-critical or perhaps even safety-critical applications, but it
will never be able
to compete with SPARK Ada or even Ada at the highest level of that
domain.

The important question is this: why do I waste my time with bozos like
you?



From aboudouvas at panafonet.gr  Fri Aug 10 06:45:30 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Fri, 10 Aug 2007 03:45:30 -0700
Subject: Question about properties.
In-Reply-To: <5i2t7dF3kqc46U3@mid.uni-berlin.de>
References: <1186741289.074717.174370@e16g2000pri.googlegroups.com>
	<5i2t7dF3kqc46U3@mid.uni-berlin.de>
Message-ID: <1186742730.729034.256800@i13g2000prf.googlegroups.com>

On Aug 10, 1:33 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Fri, 10 Aug 2007 03:21:29 -0700, king kikapu wrote:
> > Hi,
>
> > i read in a book the following code snippet that is dealing with
> > properties:
>
> > class ProtectAndHideX(object):
> >     def __init__(self, x):
> >         assert isinstance(x, int), '"x" must be an integer!"'
> >         self.__x = ~x
>
> >     def get_x(self):
> >         return ~self.__x
>
> >     x = property(get_x)
>
> > Can anyone please help me understand what the symbol "~" does here ??
>
> This has nothing to do with properties.  For integer objects ``~`` is the
> bitwise negation or invertion operator.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Xmmm...ok then but what is actually doing there ?? I removed it and
things seems to work the same way...



From Jiandong.Ge at gmail.com  Thu Aug  2 17:05:55 2007
From: Jiandong.Ge at gmail.com (JD)
Date: Thu, 02 Aug 2007 21:05:55 -0000
Subject: File access
In-Reply-To: <sKqdnXSO5-L-gy_bnZ2dnUVZ_ubinZ2d@comcast.com>
References: <1186072898.405831.105670@e16g2000pri.googlegroups.com>
	<sKqdnXSO5-L-gy_bnZ2dnUVZ_ubinZ2d@comcast.com>
Message-ID: <1186088755.433691.158660@m37g2000prh.googlegroups.com>

Thanks for the suggestion, I am thinking implement a database system
for that.

JD

On Aug 2, 12:11 pm, Larry Bates <larry.ba... at websafe.com> wrote:
> JD wrote:
> > Hi,
>
> > What I am trying to do is to run a subprocess on another machine using
> > subprocess.Popen, this subprocess contuinue writing something into a
> > file when it is runing.
>
> > After submit this subprocess, I tried to open the file and readlines()
> > in the loop (with a delay) in the loop) when the subprocess was
> > runing.
>
> > The problem is I could not get anything untill the subprocess
> > finished.
>
> > I also tried to run another python programm when the subprocess is
> > runing, I could get what I want.
>
> > Does anyone know why? Thanks!
>
> > JD
>
> I believe you are approaching this incorrectly.  You should probably be using a
> socket server/socket client to communicate between these two.  Or perhaps you
> could use a multi-user database table.  Writing/reading to files from two
> different workstations and expecting them to by synchronized most likely won't work.
>
> -Larry




From oliver-at-hallmarkins.net  Thu Aug 16 18:20:19 2007
From: oliver-at-hallmarkins.net (Oliver Nelson)
Date: Thu, 16 Aug 2007 15:20:19 -0700
Subject: Canceling events from COM objects
Message-ID: <46c4cdb8$0$17203$39cecf19@news.twtelecom.net>

I have MapPoint working in Python, and I'm trying to cancel events on 
the map, but I can't seem to make that happen.  I'm responding to the 
events successfully in my panel object.  My code is like this:

global MapPointMod
MapPointMod = 
win32com.client.gencache.EnsureModule("{51C0A9CA-F7B7-4F5A-96F4-43927C6FA50F}", 
0, 1, 0)

class MyPanel(wx.Panel):
     def __init__(self, *args, **kwds):
         # begin wxGlade: MyPanel.__init__
         kwds["style"] = wx.TAB_TRAVERSAL
         wx.Panel.__init__(self, *args, **kwds)
         self.frame = args[0]

         MyMap = MakeActiveXClass(MapPointMod.MappointControl, 
eventObj=self)
         self.window_1 = MyMap(self, -1)
         self.window_1.OpenMap("C:\\TEMP\\GPS_ON.ptt")
...
...
     def OnBeforeClick(self, Button, Shift, X, Y, Cancel):
         print "tada"


My event fires just fine, but I can't seem to figure out how to cancel 
the event so that mappoint doesn't do its stuff with it...I've tried 
setting Cancel based on the mappoint specs, but it doesn't seem to get 
sent back anywhere...

Any ideas please?

Thanx,

OLIVER


From witham.ian at gmail.com  Wed Aug  1 17:41:54 2007
From: witham.ian at gmail.com (Ian Witham)
Date: Wed, 01 Aug 2007 21:41:54 -0000
Subject: Filemaker interactions
Message-ID: <1186004514.108975.119380@e9g2000prf.googlegroups.com>

Hello,

I'm hoping someone here can put me on the right track with some broad
concepts here.

What I am hoping to achieve is a simple HTML page to be served over
our company LAN, into which the users (Real Estate Agents) can enter a
property address or reference number.

My next thought was to have a Python CGI script query our filemaker
database of property listings, construct a PDF from the relevant
information, and finally return this PDF to the user.

At no stage do I want the user to have unfettered access to the
database or the ability to alter/delete records.

My question is: what is the most appropriate way for my script to
interact with Filemaker? Can this be done with Filemaker Pro 6?

According to the Filemaker Help, the "Local Data Access Companion"
shares the FileMaker Pro database with ODBC-compliant applications on
the same computer. Is this the right option?

Can my CGI script be an ODBC client? How? Would it need to be
Filemaker specific code or does ODBC have a standardised format?

I'm grateful for any advice and a nudge in the right direction.

Ian.



From ghirai at ghirai.com  Tue Aug 14 14:45:51 2007
From: ghirai at ghirai.com (Ghirai)
Date: Tue, 14 Aug 2007 21:45:51 +0300
Subject: curses library
In-Reply-To: <slrnfc3t7e.1p0.horpner@FIAD06.norwich.edu>
References: <mailman.1980.1187115104.22759.python-list@python.org>
	<slrnfc3t7e.1p0.horpner@FIAD06.norwich.edu>
Message-ID: <20070814214551.1cb50566.ghirai@ghirai.com>

On Tue, 14 Aug 2007 18:27:16 GMT
Neil Cerutti <horpner at yahoo.com> wrote:

> On 2007-08-14, Ghirai <ghirai at ghirai.com> wrote:
> > I need to write a console application.
> >
> > Are there any wrappers around curses/ncurses?
> > Or any other similar libraries?
> 
> The answer depends on your chosen platform. Python hasn't got a
> cross-platform console library as one of its included batteries.
> 
> First try the curses module. It does come with Python on systems
> with a curses port.
> 
> For Windows, there's the Effbot's console module.
> http://effbot.org/zone/console-index.htm
> 
> Or go to plan B: Use a Tkinter or other GUI interface's text
> widget.

Forgot to say, i don't need it to work on windows :)

-- 
Regards,
Ghirai.


From pablo.yabo at gmail.com  Mon Aug 13 13:42:18 2007
From: pablo.yabo at gmail.com (Pablo Yabo)
Date: Mon, 13 Aug 2007 14:42:18 -0300
Subject: C++ Binding with Threads
Message-ID: <db6698600708131042h79d3463ekce8c4099f9b0c38f@mail.gmail.com>

Hello,

I want to embed Python in an application and use an API of the application
from Python.
The application uses a library that creates several threads and I the users
of the application will write Python scripts handling this events.

The problem is that I having problems with threads. I saw that I have to
PyEval_InitThreads and then PyThreadState_New and PyThreadState_Swap from
the new thread but this way to solve the problem doesn't work for me because
I need to let 2 or more threads run at the SAME time.
The interpreter lock doesn't let them run at the same time so I'm looking
for another solution. I saw Py_NewInterpreter and I tried to use it but it
doesn't work if I don't keep the lock.

Can anyone help me to solve this issue or tell me 'Forget it!'?


Thanks on advance,
Pablo Yabo
--
http://www.nektra.com
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From rrs at researchut.com  Mon Aug 13 14:08:15 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Mon, 13 Aug 2007 23:38:15 +0530
Subject: Module imports during object instantiation
References: <mailman.1845.1186783217.22759.python-list@python.org>
	<f9io6j$p80$1@daisy.noc.ucla.edu>
	<1186888682.860619.258610@19g2000hsx.googlegroups.com>
	<46c011b5$0$417$426a74cc@news.free.fr>
Message-ID: <f9j6p4-g08.ln1@learner.hq.netapp.com>

Bruno Desthuilliers wrote:

> Ritesh Raj Sarraf a ?crit :
> 
> The initializer will be called *each time* you instanciate the class.
> And nothing prevents client code from calling it explicitelly as many
> times as it wants  - ok, this would be rather strange, but this is still
> technically possible. What I mean that you have no assurance about the
> number of times an initializer will be called.
>

Yes, it should be called _each time_ I do an instantiation. But the point
is, I'm doing it only once. And I don't see people instantiating multiple
times. And even if you do, it should do separate imports.

log1 = Log()
log2 = Log()

Both the objects are separate from each other in every manner and they share
nothing.

> 
> wrt/ your problem, remember that top-level code is executed when the
> module is loaded (either as a main program or as an imported module).
> The canonical solution to os-specific imports is to handle them at the
> top-level:
> 
> if os.name == 'posix:
>    from some_posix_module import get_colors
> elif os.name in ['nt', 'dos']:
>    from some_nt_module import get_windows_color as get_colors
> else:
>    get_colors = lambda: None # or any other sensible default value...
> 
> class SomeClass(object):
>    def __init__(self, *args, **kw):
>      self.colors = get_colors()

This is what I'm left with to do currently. But I doubt if that makes by
classes independent and to "Just Work". If someone was to cut/paste just
the class, it won't work. He'll have to go through the imports and figure
out which one relates to the class he want's to import and add similar code
to his.

Ritesh
-- 
If possible, Please CC me when replying. I'm not subscribed to the list.



From khemkaamit at gmail.com  Wed Aug 22 01:56:19 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Wed, 22 Aug 2007 11:26:19 +0530
Subject: for statement on empty iterable
In-Reply-To: <1187761270.713307.224570@i38g2000prf.googlegroups.com>
References: <1187760507.951994.50310@q4g2000prc.googlegroups.com>
	<7xabsk3zgm.fsf@ruckus.brouhaha.com>
	<1187761270.713307.224570@i38g2000prf.googlegroups.com>
Message-ID: <1360b7230708212256l392155b9ua11d1113846b609e@mail.gmail.com>

On 8/22/07, james_027 <cai.haibin at gmail.com> wrote:
> hi Paul,
>
> >
> > That doesn't crash or anything like that, but it also doesn't
> > set the index variable, which can cause confusion in some situations.
>
> Thanks for your quick answer ... Actually I was thinking how do I
> access the index inside a for statement? Can you help

Have a look at "enumerate", You can iterate over a list like:

for i,x in enumerate(['a', 'b', 'c']):
    print i, x

It prints:
0 a
1 b
2 c

cheers,
amit

----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in
Home Page: www.cse.iitd.ernet.in/~csd00377

Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.


From steve at holdenweb.com  Tue Aug 21 19:14:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Aug 2007 19:14:30 -0400
Subject: Submit Your Python Scripts
In-Reply-To: <1187718492.549619.164440@w3g2000hsg.googlegroups.com>
References: <1187718492.549619.164440@w3g2000hsg.googlegroups.com>
Message-ID: <fafrkd$5n3$2@sea.gmane.org>

andrew.sain at gmail.com wrote:
> Hi, just wanted to invite any Python script authors to submit their
> Python script to our popular software site
> at [http:elided]
> 
> We have just today added a "Scripts" directory which includes a Python
> subdirectory
> [http:elided]
> 
> The first submissions usually maintain a high position in our
> directories so the sooner you can get your
> script listed the more exposure you should be able to receive for your
> script.
> 
> You can also submit PHP, AJAX, ASP, Ruby on Rails, CGI, Flash, Python,
> CFML, .NET, Java, XML and C/C++ scripts and coding.
> 
Ooh, goody. I just *live* to expose my scripts. Not.

What an *ugly* site.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From iclark at mail.ewu.edu  Thu Aug  2 14:37:01 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Thu, 02 Aug 2007 11:37:01 -0700
Subject: problems playing with dates from any month.
In-Reply-To: <f81479dd0708021116g693b9163v1c7c0daaa8bd403d@mail.gmail.com>
References: <f81479dd0708021031s208afc54y59780b19889d268b@mail.gmail.com>	<f8t533$6n6$1@sea.gmane.org>
	<f81479dd0708021116g693b9163v1c7c0daaa8bd403d@mail.gmail.com>
Message-ID: <f8t88e$hp3$1@sea.gmane.org>

krishnakant Mane wrote:
> On 02/08/07, Ian Clark <iclark at mail.ewu.edu> wrote:
> 
>> http://docs.python.org/lib/node85.html
>>
> I looked there even before.
> but could not figure out what the code did.
> I know in that variable called s there was a string in a valid date format.
> but when datetime.strptime was used, I did not understand the place
> where a date object say d was created.
> I would expect some thing like d = and the function.  but I did not fine that.
> only reference was the datetime module and the documentation is not as good.

 >>> import datetime
 >>> import time
 >>> fmt_string = '29/05/2005'
 >>> date_tuple = time.strptime(fmt_string, '%d/%m/%Y')
 >>> print date_tuple
(2005, 5, 29, 0, 0, 0, 6, 149, -1)
 >>> date_tuple_minus_tz = date_tuple[0:6]
 >>> print date_tuple_minus_tz
(2005, 5, 29, 0, 0, 0)
 >>> date_obj = datetime.datetime(*date_tuple_minus_tz)

This last line is equivalent to the following:
 >>> date_obj = datetime.datetime(2005, 5, 29, 0, 0, 0)
The * in front of a tuple expands it's arguments when making a function call

 >>> print date_obj
2005-05-29 00:00:0
 >>> print date_obj.day == 5
False

> another question I am getting is that where is the list of all
> formatting characters.  like for example Y is 4 digit year M is month
> MM is month in 2 digits etc.
> I am trying to locate a list of all these denoters.
> can you provide me the place?

http://docs.python.org/lib/module-time.html

Look for the strptime() function.

> 
> 
>> Then it's just:
>>
>> if date_obj.day == 5:
>>      print 'It's the fifth day of the month'
>>
> this was much better than the documentation, thanks,
> regards,
> Krishnakant.

Hope that helps.

Ian



From sentientholon at gmail.com  Wed Aug 22 11:51:18 2007
From: sentientholon at gmail.com (Frederick Polgardy)
Date: Wed, 22 Aug 2007 15:51:18 -0000
Subject: instance method questions
In-Reply-To: <mailman.119.1187796216.32294.python-list@python.org>
References: <mailman.119.1187796216.32294.python-list@python.org>
Message-ID: <1187797878.979101.179400@e9g2000prf.googlegroups.com>

On Aug 22, 10:23 am, Danny <shev... at lanl.gov> wrote:
> 1) how do I dynamically inspect an object to determine if it has an instance
> method? (there is a class method with the same name)

class Foo:
    def foo(self):
        pass

x = Foo()

import types

>>> isinstance(x.foo, types.MethodType)
True

> 2) how do I dynamically delete the instance method?

>From the instance?  You can't, you have to delete it from the class:

>>> del Foo.foo



From tim at tdw.net  Mon Aug 27 12:41:53 2007
From: tim at tdw.net (Tim Williams)
Date: Mon, 27 Aug 2007 17:41:53 +0100
Subject: Image.open( "C:\test.jpg") is this wrong ?
In-Reply-To: <W82330649.363.70826.1@mxextra>
References: <CEFAE560FE3E3C458A2335A1AA37A82D06763937@MAIL2W2K3.WarrenNT.SaintFrancis.Loc>
	<W82330649.363.70826.1@mxextra>
Message-ID: <9afea2ac0708270941u2c9dad3eyb9877de04e76d6f7@mail.gmail.com>

On 27/08/07, Simon Brunning <simon at brunningonline.net> wrote:
> On 8/27/07, Carnell, James E <jecarnell at saintfrancis.com> wrote:
>
> > Image.open("C:\test.jpg")
>
> Try:
>
> Image.open(r"C:\test.jpg")
>
> See http://docs.python.org/ref/strings.html

r"C:\test.jpg"

also

"C:\\test.jpg"  or  'C:/test.jpg'


From tjreedy at udel.edu  Tue Aug 21 10:08:52 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 21 Aug 2007 10:08:52 -0400
Subject: GeneratorExit should derive from BaseException, not Exception
References: <46CA0EFE.6020103@imvu.com> <fadmm2$m3k$1@sea.gmane.org>
	<46CA8DAD.6060704@imvu.com>
Message-ID: <faermq$llp$1@sea.gmane.org>


| I've actually read the background on the exception hierarchy (and agree
| with it all), especially other suggestions that GeneratorExit derive
| from BaseException.  As I understand it, Guido's objections are 
threefold:

[snip]

After waiting a day or so to see if you get any more feedback here, I think 
you are ready to take your chances on pydev.  The filter object idea from 
your other post is an interesting idea for a more general solution but I 
have no opinion on practicality or acceptibility.

tjr





From antikraft at gmail.com  Sat Aug 25 22:58:28 2007
From: antikraft at gmail.com (Clover)
Date: Sat, 25 Aug 2007 21:58:28 -0500
Subject: Python error on Mac
Message-ID: <46D0EC54.8030806@gmail.com>

When trying to do some things on my Mac (starting Lyx, compiling Latex 
via TextMate) I get this error:

python: execv: 
/Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/Contents/MacOS/Python: 
No such file or directory

I (and people on Lyx and TextMate lists) are at a complete loss as to 
why this is happening. I didn't (at least intentionally) fiddle with 
Python setup.

Thanks!


From nospam.themindstorm at gmail.com  Wed Aug  1 13:59:41 2007
From: nospam.themindstorm at gmail.com (Alex Popescu)
Date: Wed, 1 Aug 2007 17:59:41 +0000 (UTC)
Subject: Checking object types
References: <496954360708011012p20f2dd3cu74f0ff34deb5505f@mail.gmail.com>
Message-ID: <Xns997FD53939199themindstorm@80.91.229.5>

"Robert Dailey" <rcdailey at gmail.com> wrote in
news:496954360708011012p20f2dd3cu74f0ff34deb5505f at mail.gmail.com: 

> ------=_Part_51775_19953536.1185988361742
> Hi,
> 
> I'm currently interested in creating an __add__() operator for one of
> my classes. This class handles both integers and objects its own type,
> however I don't know how I can perform special add operations
> depending on which is passed in. Since I haven't seen any evidence of
> function overloading, I'm assuming I'll have to check the types of the
> variables passed in inside of my __add__() method.
> 
> Take the two following examples:
> 
> vector3(3,4,2) + 5 = vector3(8,9,7)
> vector3(3,2,1) + vector3(4,5,6) = vector3(7,7,7)
> 
> Any tips? Thanks.
> 

That's an option. Another option was posted a while ago by GvR and was 
using some decorator to dispatch to different methods according to the 
type. I don't seem to find the link right now, but you can search it on GvR 
blog.

bests,
./alex
--
.w( the_mindstorm )p.



From stefan.behnel-n05pAM at web.de  Mon Aug 27 05:54:35 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 27 Aug 2007 11:54:35 +0200
Subject: ANN: SCF released GPL
In-Reply-To: <7x3ay5d1mn.fsf@ruckus.brouhaha.com>
References: <2qnAi.21495$eY.19028@newssvr13.news.prodigy.net>
	<7x3ay5d1mn.fsf@ruckus.brouhaha.com>
Message-ID: <46D29F5B.9050506@web.de>

Paul Rubin wrote:
> hg <hg at nospam.org> writes:
>> I am looking for a free subversion server resource to put the code
>> ... if you know of any.
> 
> Does it have to be SVN?  I think Savannah and Sourceforge both still
> use CVS.

At least SF has usable Subversion support by now. You can choose between CVS
or SVN.

Berlios works alike, and it's Europe based.

http://developer.berlios.de/


> I'm not sure what Launchpad uses.

Launchpad is Ubuntu, meaning it uses Bazaar. It has SVN integration, though.

Stefan


From bdesth.quelquechose at free.quelquepart.fr  Sat Aug 25 04:29:29 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 25 Aug 2007 10:29:29 +0200
Subject: Is it reasonably easy easy to something like this with python?
In-Reply-To: <mailman.78.1188327771.28954.python-list@python.org>
References: <1188326947.527698.245770@r23g2000prd.googlegroups.com>
	<mailman.78.1188327771.28954.python-list@python.org>
Message-ID: <46d488e7$0$20294$426a34cc@news.free.fr>

Gerardo Herzig a ?crit :
> walterbyrd wrote:
> 
>> This is made with a php5 framework called qcodo.
>>
>> http://examples.qcodo.com/examples/dynamic/inline_editing.php
>>
>> With qcodo it's easy to make grids that are sortable and inline
>> editable. Qcodo grids work from the database - not an xml table or
>> array. Qcodo handles complex data relations, and fairly large
>> datadabes.
>>
>> I like python better than php, but I don't know of any python tools to
>> create these sorts of grids.
>>
>>  
>>
> The one who make that table sorteable is AJAX. Not php. The php part is 
> kind of trivial (so it would be `trivial' in python too). It just reads 
> some data and format it in an html table.

FWIW, Pylons have all sorts of javascript/ajax helpers (using 
prototype.js).



From http  Sat Aug 11 08:29:01 2007
From: http (Paul Rubin)
Date: 11 Aug 2007 05:29:01 -0700
Subject: Deleting objects on the fly
References: <1186705500.227658.163170@q3g2000prf.googlegroups.com>
	<46BC35F2.4070600@metavr.com>
	<mailman.1842.1186771794.22759.python-list@python.org>
	<1186835172.396997.210710@d55g2000hsg.googlegroups.com>
Message-ID: <7xwsw2b6gi.fsf@ruckus.brouhaha.com>

Dustan <DustanGroups at gmail.com> writes:
> > | del x will remove x from memory if nothing else is refering to it,
> > This is implementation dependent: true for CPython, not for Jython, ??? for
> > IronPython.
> Wait a second; do you mean to say that in Jython, del x will never
> remove x from memory? How do you free up RAM?

It stays around until the GC picks it up.


From carsten at uniqsys.com  Thu Aug 23 09:00:09 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 23 Aug 2007 09:00:09 -0400
Subject: Baby Steps, optionDB
In-Reply-To: <Pcezi.6450$924.6108@newssvr23.news.prodigy.net>
References: <Uk7zi.1531$vU4.979@nlpi068.nbdc.sbc.com>
	<1187862216.183609.89810@r23g2000prd.googlegroups.com>
	<Pcezi.6450$924.6108@newssvr23.news.prodigy.net>
Message-ID: <1187874009.3380.7.camel@dot.uniqsys.com>

On Thu, 2007-08-23 at 04:30 -0700, W. Watson wrote:
> I used to program in C++, and there's one thing I've never liked about 
> OOP. Too much typing!

Blame C++, not OOP. In time, you will find that Python's approach to OOP
in particular and to programming in general allows you to express your
ideas more concisely than you could in other programming languages.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From vedrandekovic at v-programs.com  Fri Aug  3 07:56:54 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Fri, 03 Aug 2007 04:56:54 -0700
Subject: wxpython TreeCtrl with os.listdir
Message-ID: <1186142214.786703.75380@w3g2000hsg.googlegroups.com>

Hello,

Does anybody know how can I "insert" os.listdir items in wx python
TreeCtrl and every item assign adequately
icon on this example
import wx


class TestFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="simple tree with icons",
size=(400,500))


        il = wx.ImageList(16,16)

        # adequately icons
        self.fldridx = il.Add(wx.ArtProvider.GetBitmap(wx.ART_FOLDER,
wx.ART_OTHER, (16,16))) # icon for os.listdir folder
        self.fldropenidx =
il.Add(wx.ArtProvider.GetBitmap(wx.ART_FILE_OPEN,wx.ART_OTHER,
(16,16)))
# icon for os.listdir file
        self.fileidx =
il.Add(wx.ArtProvider.GetBitmap(wx.ART_NORMAL_FILE, wx.ART_OTHER,
(16,16)))
# icon for os.listdir open folder



        self.tree = wx.TreeCtrl(self)

        self.tree.AssignImageList(il)
        root = self.tree.AddRoot("wx.Object")
        self.tree.SetItemImage(root,
self.fldridx,wx.TreeItemIcon_Normal)
        self.tree.SetItemImage(root,
self.fldropenidx,wx.TreeItemIcon_Expanded)

        self.AddTreeNodes(root, data.tree)  # There must be os.listdir
items
        self.tree.Expand(root)


    def AddTreeNodes(self, parentItem, items):
        for item in items:
            if type(item) == str:
                newItem = self.tree.AppendItem(parentItem, item)
                self.tree.SetItemImage(newItem,
self.fileidx,wx.TreeItemIcon_Normal)
            else:
                newItem = self.tree.AppendItem(parentItem, item[0])
                self.tree.SetItemImage(newItem,
self.fldridx,wx.TreeItemIcon_Normal)
                self.tree.SetItemImage(newItem,
self.fldropenidx,wx.TreeItemIcon_Expanded)

                self.AddTreeNodes(newItem, item[1])


    def GetItemText(self, item):
        if item:
            return self.tree.GetItemText(item)
        else:
            return ""

app = wx.PySimpleApp(redirect=True)
frame = TestFrame()
frame.Show()
app.MainLoop()



Regards,
Vedran



From arkanes at gmail.com  Wed Aug  8 11:10:15 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 8 Aug 2007 10:10:15 -0500
Subject: Stop a thread on deletion
In-Reply-To: <f9ckqg$ghi$1@netlx020.civ.utwente.nl>
References: <f9ckqg$ghi$1@netlx020.civ.utwente.nl>
Message-ID: <4866bea60708080810w39832910s6c1e68ed017b45eb@mail.gmail.com>

On 8/8/07, Sjoerd Op 't Land <sjoerd at intercue.nl> wrote:
> Hello all,
>
> I'm using threading for generating video content. The trouble is how to
> kill the thread, because there are multiple (simultaneous) owners of a
> thread. Ideally, a flag would be set when the reference count of the
> thread becomes zero, causing the run() loop to quit. Example:
>
> import threading
> import time
> import gc
>
> class myThread(threading.Thread):
>    def __init__(self):
>      self.passedOut = threading.Event()
>      threading.Thread.__init__(self)
>    def __del__(self):
>      self.passedOut.set()
>    def run(self):
>      i = 0
>      while not self.passedOut.isSet():
>        i += 1
>        print "Hi %d" % i
>        time.sleep(0.25)
>
>
> a = myThread()
> a.start()
> time.sleep(2.5)
> a = None
> time.sleep(2.5)
>
> Unfortunately, this doesn't work. When I remove the while-loop, __del__
> is called, actually. Appearantly there is still some reference to the
> thread while it is running.
>
> I tried gc.get_referrers(self), but it seems to need some parsing. I'm
> not sure how to implement that and I'm not sure whether it will work
> always or not.
>

gc.get_referrers returns a list of object instances that hold a
reference to the object. The important one in this case is, of course,
the thread itself. The thread holds a reference to the run method
which (of course) requires a reference to the object. In other words,
a running thread cannot be refcounted to zero. You are going to need a
better method of handling your resources.

Perhaps instead of holding a reference to the thread, they could hold
a reference to a proxy object:

import threading
import time
import gc
import pprint

class myThread(threading.Thread):
    def __init__(self):
        self.passedOut = threading.Event()
        threading.Thread.__init__(self)
    def run(self):
        i = 0
        while not self.passedOut.isSet():
          i += 1
          print "Hi %d" % i
          time.sleep(1)
        print "stopped"


class ThreadProxy(object):
    def __init__(self, proxy_for):
        self.proxy_for = proxy_for
    def __del__(self):
        self.proxy_for.passedOut.set()
    def start(self):
        self.proxy_for.start()


From arkanes at gmail.com  Wed Aug 29 13:13:42 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 29 Aug 2007 12:13:42 -0500
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188369928.755777.142690@i38g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
Message-ID: <4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>

On 8/29/07, Russ <uymqlp502 at sneakemail.com> wrote:
> On Aug 28, 10:58 pm, Michele Simionato <michele.simion... at gmail.com>
> wrote:
>
> > Why do you think that would ad a strong positive capability?
> > To me at least it seems a big fat lot of over-engineering, not
> > needed in 99% of programs. In the remaining 1%, it would still not
> > be needed since Python provides out of the box very powerful
> > metaprogramming capabilities so that you can implement
> > yourself the checks you need, if you really need them.
>
> I get the strong impression you don't really understand what
> programming by contract is.
>

Don't be condescending.

> I have not yet personally used it, but I am interested in anything
> that can help to make my programs more reliable.

The entire issue of software reliability, exactly what metrics you
should use to measure it, and whether any specific technique results
in more of it are very much in debate. If you want to experiment with
these techniques, you can do so without them being in the Python core.
Python has all the support you need to play with them right now.

>If you are
> programming something that doesn't really need to be correct, than you
> probably don't need it. But if you really need (or want) your software
> to be correct and reliable as possible, I think you you should be
> interested in it. You might want to read this:
>

You don't want your software to KILL BABIES, do you? If you don't want
your programs to KILL BABIES then you should use our technique, so you
don't KILL BABIES.

There are ways to make correct programs besides DBC. It may not even
help in the general case - just as with unit testing and type proving,
you're going to be limited by what you don't think to assert or
document or test, and I've seen no evidence that DBC is any better
than anything else at preventing unwritten assumptions.


From zentraders at gmail.com  Mon Aug  6 15:42:08 2007
From: zentraders at gmail.com (Zentrader)
Date: Mon, 06 Aug 2007 12:42:08 -0700
Subject: RTF 2 Tiff
In-Reply-To: <1186427712.284976.207560@d30g2000prg.googlegroups.com>
References: <1186427712.284976.207560@d30g2000prg.googlegroups.com>
Message-ID: <1186429328.713392.222020@z24g2000prh.googlegroups.com>

On Aug 6, 12:15 pm, cjankow... at hbr-inc.com wrote:
> Hi all,
> I am trying to convert an RTF file to a Tiff image using Python.  This
> process will convert several hundred images daily.  Currently I am
> able to get the RTF file into a text format using Rtf2Txt.py, but I
> loose the images contained in the RTF file.  I have the same problem
> when I convert to .HTML using Rtf2Html.py.  I do not have a sample
> that I can share because of HIPPA regulations.  Can anyone please help
> me?
>
> Thanks,
>
> Chris J.

Perhaps someone will have a more Pythonic answer.  Abiword will
convert from rtf to html and can be run from the command line.  I
would also look at openjade and w3m.  You may have to parse the file
and look for the images and convert them separately using an
Imagemagick type program.  I don't have much experience with this, but
hopefully one of these will work or someone else can provide more info.



From andmart at gmail.com  Fri Aug  3 11:32:23 2007
From: andmart at gmail.com (=?ISO-8859-1?Q?Andr=E9_Martins?=)
Date: Fri, 3 Aug 2007 12:32:23 -0300
Subject: Eclipse/PyDev question.
In-Reply-To: <1186153503.806195.225560@g4g2000hsf.googlegroups.com>
References: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>
	<1186153259.372809.230110@d30g2000prg.googlegroups.com>
	<1186153503.806195.225560@g4g2000hsf.googlegroups.com>
Message-ID: <bfc796de0708030832m16ac29a8se60f84f45cd50bf@mail.gmail.com>

I think you can download the eclipse plataform e get pydev through eclipse
update.
Eclipse Europa distro is a group of 21 projects  like jdt and cdt not
correlate to python.

[]'s
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From gagsl-py2 at yahoo.com.ar  Tue Aug 28 00:36:37 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 28 Aug 2007 01:36:37 -0300
Subject: sorting a list of lists
References: <1188233798.684136.263640@22g2000hsm.googlegroups.com>
	<1188235267.790442.193830@q5g2000prf.googlegroups.com>
	<46D31827.9060400@web.de>
	<1188240075.549626.42020@i38g2000prf.googlegroups.com>
Message-ID: <op.txq5rbaix6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 27 Aug 2007 15:41:15 -0300, iapain <iapain at gmail.com> escribi?:

>> Taking advantage of stable sorting is totally not a hack. The OP just  
>> tried
>> the two sorting steps in the wrong order.
>
> I didnt say not to use stable sorting, but write a generic function
> and hacky code. It is always better to adopt a generic approach.

Sorting on multiple keys from last to first has been the "standard" and  
"generic" approach even before computers existed. Hollerith punched cards  
"processors" did it that way around 1890.

-- 
Gabriel Genellina



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 24 06:45:03 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 24 Aug 2007 12:45:03 +0200
Subject: Server-side scripting in python
In-Reply-To: <1187843960.922925.127990@i13g2000prf.googlegroups.com>
References: <1187614732.519547.296020@j4g2000prf.googlegroups.com>
	<gi6rp4-mes.ln1@lairds.us>
	<1187755436.972359.293360@i13g2000prf.googlegroups.com>
	<0k2up4-lla.ln1@lairds.us>
	<1187843960.922925.127990@i13g2000prf.googlegroups.com>
Message-ID: <46ceb673$0$415$426a74cc@news.free.fr>

Nagarajan a ?crit :
> On Aug 22, 8:50 pm, cla... at lairds.us (Cameron Laird) wrote:
>> In article <1187755436.972359.293... at i13g2000prf.googlegroups.com>,Nagarajan  <nag... at gmail.com> wrote:
>>
>>>>                         .
>>>>                         .
>>>>                         .
>>> Let me phrase my problem in a finer way.
>>> I have done simple projects inpython.
>>> I wanted to explore web programming facet ofpython. The problem at my
>>> hand is to develop an email web client. I've developed web
>>> applications in PHP. I need to evaluatepython-based web frameworks to
>>> make a smart choice of the web framework or a language like PHP, Perl
>>> based on performance predominantly. Do I make myself clear now?
>>                         .
>>                         .
>>                         .
(snip Cameron's answer)

> Django is intuitive and handy. I think I would go with that.
> Any suggestions?

Yes : have a look at Pylons too. It's actually quite less 'polished' 
than Django, but it's IMHO going in the right direction (as a matter of 
fact, Turbogears 2.0 - another well-known Python MVC framework -  will 
be based on Pylons...). Django is clearly more oriented toward 
content-management, which might not be what you want for this project.

My 2 cents...


From Graham.Dumpleton at gmail.com  Wed Aug  8 20:34:24 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Thu, 09 Aug 2007 00:34:24 -0000
Subject: some import / namespace questions
In-Reply-To: <mailman.1745.1186585520.22759.python-list@python.org>
References: <mailman.1745.1186585520.22759.python-list@python.org>
Message-ID: <1186619664.407509.161260@j4g2000prf.googlegroups.com>

On Aug 9, 1:11 am, stef mientki <s.mien... at mailbox.kun.nl> wrote:
> hello,
>
> I'm working on a rather strange program,
> that is partially build dynamically,
> and where users can create plugins,
> without knowing any of the details of the core program.
>
> Of course this leads to some weird bugs,
> so one of the things I want to view/log is the order (and even better
> the way) modules are imported.

Set and export the environment variable:

  PYTHONVERBOSE=1

in your environment before you run Python. This will generate lots of
internal information about what Python is up to, including details
about module importing, where it is searching for modules etc etc. For
example:

>>> import socket
# /System/Library/Frameworks/Python.framework/Versions/2.3/lib/
python2.3/socket.pyc matches /System/Library/Frameworks/
Python.framework/Versions/2.3/lib/python2.3/socket.py
import socket # precompiled from /System/Library/Frameworks/
Python.framework/Versions/2.3/lib/python2.3/socket.pyc
dlopen("/System/Library/Frameworks/Python.framework/Versions/2.3/lib/
python2.3/lib-dynload/_socket.so", 2);
import _socket # dynamically loaded from /System/Library/Frameworks/
Python.framework/Versions/2.3/lib/python2.3/lib-dynload/_socket.so
dlopen("/System/Library/Frameworks/Python.framework/Versions/2.3/lib/
python2.3/lib-dynload/_ssl.so", 2);
import _ssl # dynamically loaded from /System/Library/Frameworks/
Python.framework/Versions/2.3/lib/python2.3/lib-dynload/_ssl.so
import errno # builtin

Output goes to standard error. There can be quite a lot, so you may
want to redirect standard error to a file.

Graham



From jarausch at skynet.be  Mon Aug 13 10:18:15 2007
From: jarausch at skynet.be (Helmut Jarausch)
Date: Mon, 13 Aug 2007 16:18:15 +0200
Subject: Drawing a graph
In-Reply-To: <mailman.1917.1187012829.22759.python-list@python.org>
References: <mailman.1917.1187012829.22759.python-list@python.org>
Message-ID: <46C06827.9060804@skynet.be>

Ghirai wrote:
> Hello list,
> 
> I need to draw a graph, 2 axes, 2D, nothing fancy.
> One of the axes is time, the other one is a series of integers.
> 
> I don't care much about the output format.
> 
> Are there any specialized libraries for this, or should i use PIL?
> 

What about Gnuplot.py
http://gnuplot-py.sourceforge.net/


-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From arunmail at gmail.com  Thu Aug  2 22:03:38 2007
From: arunmail at gmail.com (lazy)
Date: Fri, 03 Aug 2007 02:03:38 -0000
Subject: Berkely Db. How to iterate over large number of keys "quickly"
In-Reply-To: <mailman.1538.1186087384.22759.python-list@python.org>
References: <1186083838.318952.254370@q3g2000prf.googlegroups.com>
	<mailman.1538.1186087384.22759.python-list@python.org>
Message-ID: <1186106618.835530.278450@d30g2000prg.googlegroups.com>

On Aug 2, 1:42 pm, Ian Clark <icl... at mail.ewu.edu> wrote:
> lazy wrote:
> > I have a berkely db and Im using the bsddb module to access it. The Db
> > is quite huge (anywhere from 2-30GB). I want to iterate over the keys
> > serially.
> > I tried using something basic like
>
> > for key in db.keys()
>
> > but this takes lot of time. I guess Python is trying to get the list
> > of all keys first and probbaly keep it in memory. Is there a way to
> > avoid this, since I just want to access keys serially. I mean is there
> > a way I can tell Python to not load all keys, but try to access it as
> > the loop progresses(like in a linked list). I could find any accessor
> > methonds on bsddb to this with my initial search.
> > I am guessing BTree might be a good choice here, but since while the
> > Dbs were written it was opened using hashopen, Im not able to use
> > btopen when I want to iterate over the db.
>
> db.iterkeys()
>
> Looking at the doc for bsddb objects[1] it mentions that "Once
> instantiated, hash, btree and record objects support the same methods as
> dictionaries." Then looking at the dict documentation[2] you'll find the
> dict.iterkeys() method that should do what you're asking.
>
> Ian
>
> [1]http://docs.python.org/lib/bsddb-objects.html
> [2]http://docs.python.org/lib/typesmapping.html


Thanks. I tried using db.first and then db.next for subsequent keys.
seems to be faster. Thanks for the pointers



From david at asdf.asdf  Thu Aug 23 23:21:50 2007
From: david at asdf.asdf (bambam)
Date: Fri, 24 Aug 2007 13:21:50 +1000
Subject: beginner, idomatic python 2
Message-ID: <13csjmeaoqh9le3@corp.supernews.com>

Would someone like to suggest a replacement for this? This is a
function that returns different kinds of similar objects, depending
on what is asked for. PSP and PWR are classes.  I don't really
want to re-write the calling code very much: I'm just wondering
if the function can be replaced with some kind of OOP pattern.

def Device(DeviceType):
    if DeviceType=='PSP':
        return PSP()
    elif DeviceType=="Power Supply"
        return PWR()
    etc...


Thanks! 




From gnewsg at gmail.com  Tue Aug 21 19:53:31 2007
From: gnewsg at gmail.com (billiejoex)
Date: Tue, 21 Aug 2007 16:53:31 -0700
Subject: Extracting the traceback
Message-ID: <1187740411.848743.151960@x35g2000prf.googlegroups.com>

Hi there,
I'm facing a case where I need to get the traceback outptut when
occurring an exception.
I solved such problem by using traceback module in conjunction with
StringIO:

import StringIO, traceback
try:
    raise Exception
except:
    f = StringIO.StringIO()
    traceback.print_exc(file=f)
    print f.getvalue()

... but this seems a little poor to me since I first put output into
the StringIO.StringIO(), then I get it back by using getvalue() on
it.
Is there a way to avoid the use of StringIO and get such output
without using such (useless) additional step?

Thanks in advance



From carsten at uniqsys.com  Thu Aug 30 09:47:21 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 30 Aug 2007 09:47:21 -0400
Subject: SAXParseException: not well-formed (invalid token)
In-Reply-To: <46D6C40F.4060105@cesga.es>
References: <fb6alc$pfj$1@news.cesga.es> <46D6B9F6.2010402@web.de>
	<46D6C40F.4060105@cesga.es>
Message-ID: <1188481641.3468.5.camel@dot.uniqsys.com>

On Thu, 2007-08-30 at 15:20 +0200, Pablo Rey wrote:
> 	Hi Stefan,
> 
> 	The xml has specified an encoding (<?xml version="1.0" encoding="UTF-8" 
> ?>).

It's possible that the encoding specification is incorrect:

>>> u = u"\N{LATIN SMALL LETTER E WITH ACUTE}"
>>> print repr(u.encode("latin-1"))
'\xe9'
>>> print repr(u.encode("utf-8"))
'\xc3\xa9'

If your input string contains the byte 0xe9 where your accented e is,
the file is actually latin-1 encoded. If it contains the byte sequence
0xc3,0xa9 it is UTF-8 encoded.

If the string is encoded in latin-1, you can transcode it to utf-8 like
this:

contents = contents.decode("latin-1").encode("utf-8")

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From bdesth.quelquechose at free.quelquepart.fr  Thu Aug 30 09:43:32 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 30 Aug 2007 15:43:32 +0200
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188520454.996940.293030@m37g2000prh.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<1188430887.481586.106760@l22g2000prc.googlegroups.com>
	<mailman.159.1188499976.28954.python-list@python.org>
	<1188504811.019632.186580@x35g2000prf.googlegroups.com>
	<46d75116$0$401$426a74cc@news.free.fr>
	<1188517050.174081.265900@x40g2000prg.googlegroups.com>
	<46d75d33$0$6231$426a34cc@news.free.fr>
	<1188520454.996940.293030@m37g2000prh.googlegroups.com>
Message-ID: <46d76790$0$410$426a74cc@news.free.fr>

Russ a ?crit :
>>>That looks like new syntax to me.
>>
>>It's the syntax for decorator functions, and it's not that new - it
>>cames with Python 2.4, released November 30, 2004.
> 
> 
> After looking more carefully at your example, I don't think it is as
> clean and logical as the
> PEP 316 syntax. 

Possibly not, but at least it's trivial to implement.

> At first I thought that your pre and post-conditions
> applied to the class,

Pre and post conditions applying to the class ? Now that's an 
interesting concept. IIRC, Eiffels pre and post conditions only apply to 
methods, and I fail to see how they could apply to a class. But since 
you're an expert on the subject, I don't doubt you'll enlighten us ?

> but now I realize that they apply to the function. I prefer to see the
> conditions inside
> the function in the doc string.  That just seems more logical to me.

Not to me. Doc strings are not for implementation. But if you want to 
implement a DbC module using doc strings, please do so.

> With all due respect,
> your proposal is interesting, but I think it overextends the "function
> decorator" idea a bit.

Definitively not, on the contrary - that's *exactly* what decorators are 
for. Else, they would be nothing more than HOFs, and there would be no 
point in having this syntactic sugar.

(snip).


From esj at harvee.org  Wed Aug 29 02:52:37 2007
From: esj at harvee.org (Eric S. Johansson)
Date: Wed, 29 Aug 2007 02:52:37 -0400
Subject: setup.py question
Message-ID: <fb3546$cuc$1@sea.gmane.org>

I have an environment where I have a bunch of data files or use would like 
Python application.  I want to use the data_files specification of set up to 
distribute those files.  But I also need to change ownership and permissions.  I 
know there's some way to do this because I've done it once before but I can't 
find how I did it and I can't find how to do in the documentation.  Any pointers 
on how to set ownership and permissions for files listed in the data_file 
section of a setup call would be wonderful.  For what it's worth, I have 
modified install(_install) methods to handle set gid wrappers.  It's a cool 
abuse of setup.  :-)

thanks



From steve at holdenweb.com  Mon Aug 27 13:23:55 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 27 Aug 2007 13:23:55 -0400
Subject: Co-developers wanted: document markup language
In-Reply-To: <46CF4386.9020801@freakmail.de>
References: <87odgyyx9u.fsf@wilson.homeunix.com>	<fakrtb$2ts$1@panix3.panix.com>	<87tzqpew22.fsf@wilson.homeunix.com>	<fal3cv$bi2$1@panix3.panix.com>	<87tzqp77my.fsf@wilson.homeunix.com>	<7xy7g1if24.fsf@ruckus.brouhaha.com>	<87mywh717i.fsf@wilson.homeunix.com>	<46CEAF71.3050900@freakmail.de>	<fand89$isa$1@sea.gmane.org>
	<46CF4386.9020801@freakmail.de>
Message-ID: <fav1b8$e53$1@sea.gmane.org>

Wildemar Wildenburger wrote:
> Robert Kern wrote:
>> Wildemar Wildenburger wrote:
>>   
>>> Torsten Bronger wrote:
>>>     
>>>> Hall?chen!
>>>>   
>>>>       
>>> Yes, you're German. Have you ever noticed that (we) Germans are 
>>> virtually the only ones that feel the need to rub our nationality into 
>>> everyones faces? ;)
>>>     
>> Howdy!
>>
>> We Americans do the same.  ;-)
>>
>>   
> Weeell, you guys mostly rub your ignorance about the rest of the world 
> into everyones faces. That's a little different.
> 
> There, I did it. Now I got my country invaded. But maybe that's a good 
> thing ... at least we will get democracy and finally find happiness.
> 
> /W
> (OK, sorry. I couldn't resist. Don't take it personally. Take it 
> nationally. ;) )

Unfortunately Americans are also well known for their inability to 
detect irony, so your pointed remarks about democracy and happiness will 
probably go mostly unnoticed.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From zyzhu2000 at gmail.com  Fri Aug 24 00:24:03 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Fri, 24 Aug 2007 04:24:03 -0000
Subject: List Comprehension Question: One to Many Mapping?
Message-ID: <1187929443.636690.287450@i13g2000prf.googlegroups.com>

Hi All,

How do I map a list to two lists with list comprehension?

For example, if I have x=[ [1,2], [3,4] ]

What I want is a new list of list that has four sub-lists:

[[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]]

[1,2] is mapped to [1,2] and [f(1), f(2)] and [3,4] is mapped to
[3,4], [f(3), f(4)].

I just can't find any way to do that with list comprension. I ended up
using a loop (untested code based on real code):

l=[]
for y in x:
   l.append(y)
   l.append([f(z) for z in y])

Thanks,
Geoffrey



From greg at cosc.canterbury.ac.nz  Tue Aug  7 05:42:16 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Tue, 07 Aug 2007 21:42:16 +1200
Subject: Redirecting stderr to null and revert
In-Reply-To: <1186439213.076470.109060@d55g2000hsg.googlegroups.com>
References: <1186439213.076470.109060@d55g2000hsg.googlegroups.com>
Message-ID: <5hqtauF3mbh2tU1@mid.individual.net>

reubendb wrote:
> def nullStderr():
>   sys.stderr.flush()
>   err = open('/dev/null', 'a+', 0)
>   os.dup2(err.fileno(), sys.stderr.fileno())
> 
> def revertStderr():
>   sys.stderr = sys.__stderr__

You're doing the redirection at one level and
trying to revert it at a different level.

If this is a Python function that's doing its
output by writing to sys.stderr, there's a
much simpler way to do the redirection:

   sys.stderr = open('/dev/null', 'w')

(that's the Python builtin function 'open',
not the one in os). Then your revertStderr
function will work.

BTW I'd arrange for the reversion to be done
in a try-finally, e.g.

   nullStderr()
   try:
     do_something()
   finally:
     revertStderr()

so you won't get stuck with a redirected stderr
if an exception occurs, and thereby not be able
to see the traceback!

--
Greg


From steve at holdenweb.com  Wed Aug  8 11:22:54 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Aug 2007 11:22:54 -0400
Subject: Seek the one billionth line in a file containing 3 billion lines.
In-Reply-To: <4866bea60708080658l170bd9eevd86cf58dbc1eddd8@mail.gmail.com>
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>	<7xzm12o7o7.fsf@ruckus.brouhaha.com>	<1186555297.877273.40540@o61g2000hsh.googlegroups.com>	<874pja70p5.fsf@benfinney.id.au>
	<4866bea60708080658l170bd9eevd86cf58dbc1eddd8@mail.gmail.com>
Message-ID: <46B9DFCE.7000505@holdenweb.com>

Chris Mellon wrote:
> On 8/8/07, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
>> Sullivan WxPyQtKinter <sullivanz.pku at gmail.com> writes:
>>
>>> On Aug 8, 2:35 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>>>> Sullivan WxPyQtKinter <sullivanz.... at gmail.com> writes:
>>>>> This program:
>>>>> for i in range(1000000000):
>>>>>       f.readline()
>>>>> is absolutely every slow....
>>>> There are two problems:
>>>>
>>>>  1) range(1000000000) builds a list of a billion elements in memory
>> [...]
>>>>  2) f.readline() reads an entire line of input
>> [...]
>>> Thank you for pointing out these two problem. I wrote this program
>>> just to say that how inefficient it is to use a seemingly NATIVE way
>>> to seek a such a big file. No other intention........
>> The native way isn't iterating over 'range(hugenum)', it's to use an
>> iterator. Python file objects are iterable, only reading eaach line as
>> needed and not creating a companion list.
>>
>>     logfile = open("foo.log", 'r')
>>     for line in logfile:
>>         do_stuff(line)
>>
>> This at least avoids the 'range' issue.
>>
>> To know when we've reached a particular line, use 'enumerate' to
>> number each item as it comes out of the iterator.
>>
>>     logfile = open("foo.log", 'r')
>>     target_line_num = 10**9
>>     for (line_num, line) in enumerate(file):
>>         if line_num < target_line_num:
>>             continue
>>         else:
>>             do_stuff(line)
>>             break
>>
>> As for reading each line: that's unavoidable if you want a specific
>> line from a stream of variable-length lines.
>>
> 
> The minimum bounds for a line is at least one byte (the newline) and
> maybe more, depending on your data. You can seek() forward the minimum
> amount of bytes that (1 billion -1) lines will consume and save
> yourself some wasted IO.

Except that you will have to count the number of lines in that first 
billion characters in order to determine when to stop.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From pavlovevidence at gmail.com  Fri Aug 17 20:42:23 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 17 Aug 2007 17:42:23 -0700
Subject: How to setup pyOpenGL3.0.a6 for window xp?
In-Reply-To: <1187395670.267971.88750@q4g2000prc.googlegroups.com>
References: <1187395670.267971.88750@q4g2000prc.googlegroups.com>
Message-ID: <1187397743.937458.301590@q3g2000prf.googlegroups.com>

On Aug 17, 8:07 pm, math2life <QJing... at gmail.com> wrote:
> Hi,
> I've already download the pyOpenGL3..0.a6 for python2.4 and installed
> python2.4,
>
> Is it necessary to install OpenGL? And if need,  which version of
> OpenGL should be
> installed?

Windows comes with OpenGL libraries.  However, before you can use
OpenGL you'll need a package that can provide an OpenGL context, which
PyOpenGL doesn't do (easily).

PyGame is the typical choice for most uses.  If all you need is a
simple window to draw on, this is the package you want.

However, it doesn't (easily) work with common GUIs like GTK and Wx.
If you want to use use OpenGL in a GUI app, then you'll want to find
an "OpenGL canvas widget" for that GUI.


Carl Banks



From silfheed at gmail.com  Sun Aug  5 14:13:21 2007
From: silfheed at gmail.com (Silfheed)
Date: Sun, 05 Aug 2007 18:13:21 -0000
Subject: the one python book
In-Reply-To: <mailman.1611.1186233912.22759.python-list@python.org>
References: <mailman.1611.1186233912.22759.python-list@python.org>
Message-ID: <1186337601.388854.254510@i38g2000prf.googlegroups.com>

On Aug 4, 6:23 am, "dhr" <dima.hris... at gmail.com> wrote:

Assuming that you already know that a ton of great stuff is on the
web, I'd also recommend 'Programming Python' and 'Python Cookbook'.
'The Python Book' would have to be the Python book ('Programming
Python', cuz it has a python on the cover and covers the python
language, brilliant!....) It's huge and is full of great scripts and,
most importantly, promotes good coding style.  Hopefully they've
updated the index tho, since the 2nd edition has an utterly pathetic
index, tho you can still find what you want pretty quickly with just
the toc.

Python Cookbook is necessary because it covers so many little hidden
secrets of python.  The section on dateutil is worth the price of the
book alone.



From raims at dot.com  Mon Aug 13 19:59:13 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Tue, 14 Aug 2007 01:59:13 +0200
Subject: chmod g+ Equivalent
References: <1187042290.821786.178420@19g2000hsx.googlegroups.com>
	<1i2t81z.1f4cmrhu1sy8iN%raims@dot.com>
	<1187046225.596726.97390@g4g2000hsf.googlegroups.com>
Message-ID: <1i2tc5o.a3g6188rwg8N%raims@dot.com>

milan_sanremo <hancock.robert at gmail.com> wrote:
> I understand that for setting the standard rwx permissions, but how do
> these affect the ability to change the setgid bit?  Under Solaris you
> cannot do it from the command line in absolute mode, so perhaps it is
> not possible in python
> 
> I'm trying to get the equivalent of 'chmod g+' not something like
> 'chmod 755'.

Sorry, I think I misunderstood the request. Isn't "#define S_ISGID
0002000" what you're asking for?

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From dave.willmer at gmail.com  Thu Aug 30 14:55:39 2007
From: dave.willmer at gmail.com (dave_w)
Date: Thu, 30 Aug 2007 18:55:39 -0000
Subject: Important Research Project
In-Reply-To: <1188482087.098419.56490@k79g2000hse.googlegroups.com>
References: <13ddcvm1bsu3s94@corp.supernews.com>
	<1188482087.098419.56490@k79g2000hse.googlegroups.com>
Message-ID: <1188500139.411988.127100@q5g2000prf.googlegroups.com>

On Aug 30, 2:54 pm, Paul McGuire <pt... at austin.rr.com> wrote:
> On Aug 30, 8:12 am, "E.D.G." <edgrs... at ix.netcom.com> wrote:
>
> > Important Research Project  (Related to computer programming)
>
> > Posted by E.D.G. on August 30, 2007 edgrs... at ix.netcom.com
>
> >     This report is being posted to a number of Internet Newsgroups
>
> Always the hallmark of a considerate poster.
>
> > to see if
> > there are any experienced computer programmers who would like to provide
> > some assistance with an effort to develop a Perl language computer program.
>
> >     Interested parties can try contacting me by e-mail or by posting a
> > response note to the comp.lang.perl.misc newsgroup.  They would need to
> > download a recent (free) MSI copy of Perl from the ActiveState Web site and
> > get it running on a Windows XP or Vista system.
>
> >http://www.activestate.com
>
> This is a little backwards, one usually presents their research topic
> *first* and their contact info *last*.  The reason?  SO PEOPLE KNOW
> WHAT THE @#$(&#!@ YOU ARE WORKING ON!  Ok, I'll bite, keep reading...
>
> >     I am presently using Perl 5.8.8
>
> Whoop-de-doo for you.
>
> > but plan to upgrade to the latest
> > version as soon as possible.  People can use Windows 98 if that is the only
> > operating system available.  Perl also runs on other operating systems.  But
> > at this time I specifically need help with the Windows version.
>
> I suspect Perl is largely the same Perl on all those platforms.  Win
> 98?  Is this a zombie spam from the turn of the century?
>
> >     The goal is to have a single Perl program (or modules) perform functions
> > that have been done by a sizeable collection of other language programs in
> > the past.
>
> Doing what!?  Grrr..., keep reading, there's gotta be a punch line...
>
> >     Help is presently needed with learning how to get Perl to generate
> > charts and also produce standalone .exe copies of itself.  The plan is to
> > then make those .exe copies available to other scientific researchers around
> > the world for free use along with free use updates when they become
> > available.  If other researchers wish to get Perl running on their own
> > computers then they will probably also be given the source code for the
> > original program for free use so that they can do their own development
> > work.
>
> Ohmigod, is Google broken?  Or has Perl gone this long and this far
> without support for creating charts and graphs?  Sounds like about 10
> minutes of research.
>
> >     Perl was originally chosen because it is quite versatile, is a free
> > download, and is supported both by ActiveState and quite a few independent
> > programmers.  So other researchers could get their own versions running
> > without having to worry about viruses or cost.
>
> (Why is this posted on all these non-Perl newsgroups, then?  I've
> *seen* Perl already, and never want to again!)
>
> >     So far the work is fairly advanced.  The effort has been underway for at
> > least a decade.  
>
> ... and we are just getting around to plotting some data.
>
> > The core data generation program was formally copyrighted
> > several years ago.  
>
> Red flag #37 - "formally copyrighted", wooo-ooooh
>
> > My present version of Perl will send data to Windows as
> > if it were being manually typed into the keyboard (important for controlling
> > other programs).  And it can directed to respond to most keystrokes even
> > when another program is the active one.  Unfortunately, Windows also
> > presently responds to those keystrokes.  And that complicates things a bit.
>
> ... and has for the past decade, and I still haven't figured it out.
>
> >     Not being a professional computer programmer I have been finding it
> > difficult to get new features such as a chart generating ability merged with
> > and running with Perl.  And the entire research project is now being slowed
> > as a result.  One of my colleagues has done an extensive amount of work with
> > Basic.  And I even offered to pay him to help with the Perl development
> > effort.  But after he downloaded a copy of Perl and examined it he decided
> > that this would involve too much effort.  I have to agree with him.
>
> Maybe that up-front language choice could stand a review...
>
> >     Once it is possible to create charts and .exe versions the plan is for
> > researchers around the world to develop Perl modules for generating a
> > variety of data related to sun, moon, planet, ocean tide crest and trough,
> > and Solid Earth Tide locations.  Most of those data can already be generated
> > with other programs.  Some of the data are not yet available anywhere as far
> > as I am aware.  If the effort is unusually successful the Perl program (or
> > modules) might eventually be converted to CGI programs that will run at one
> > or more Internet Web sites.
>
> AHHH!  The "research", I almost forgot!  Why is it left to the end of
> the message?  And do we still know what the @#(*&$ this "variety of
> data" is for?  I'm going to take a wild guess here - earthquake
> prediction?  perpetual motion?  picking guaranteed-to-win lottery
> numbers?
>
> After a pitch like that, who could not be tempted at the prospect of
> "generating a variety of data related to sun, moon, etc. etc."?  Sign
> me up - NOT!
>
> GTFA,
> -- Paul

Thanks for the amusing reply Paul, i think you summed up a few
people's feelings quite fairly, but maybe a little more tact next
time? :-)

I'm going to begin my answer with the age old taboo of 'use a
different language', but since you cross-posted to comp.lang.python, i
feel justified.

so... use python.

you didnt exactly state what you wanted out of the project, so i'm
going to take a few guesses.

if you want astrophysical data, there is a python module which is
based on NASA JPL's ephemerides system, you can find it here:

http://www.cv.nrao.edu/~rfisher/Python/py_solar_system.html

and yes, i know there is Astro::SLA on CPAN.

if you want (basic) ocean/tidal modelling, you can use this (again...
python)

http://geosci.uchicago.edu/~cdieterich/swom/

or take a look at this PDF entitled 'python for assembling climate
modelling toolkits':

www.esmf.ucar.edu/presentations/pres_0305_jacobs.pdf

if you want to connect to online databases etc., using urllib2 (a
standard python module), you can fetch the data you need in only a few
lines of code (and i mean 2 or 3 lines for basic requests)

for plotting... use matplotlib, in most python programmers minds it
has reached legendary status.

if you're still thinking about plotting in Perl, look here

http://biptest.weizmann.ac.il/course/prog/graphics/success.html

it is the graphing page from the Weizmann institute in Israel which
does a course entitled 'Perl programming course for bioinformatics and
internet'; perhaps you could use some of your research money to send
someone on the course?

and if you want to put graphs online, you can use matplotlib server
side to generate a jpg for example, and then show that using html
(again, not very many lines of code).

without knowing exactly what needs accomplished, i ts difficult to
help, but it seems like most of your programming has already been
done, and just needs some code to glue different modules together
(trust me on this one - use python).

with python, matplotlib etc, everything is cross platform, if it is
web-based access you're after, it doesnt matter what platform you
develop on
you also talk about generating standalone .exe files - use py2exe w/
NSIS, or pyInstaller, both of which have tutorials online.

most importantly of all... re-read Paul's post above.
if you don't find it as amusing as the rest of us, here's the gist...

"Ohmigod, is Google broken?"

cheers
Dave



From comp.ogz at gmail.com  Thu Aug 16 03:42:28 2007
From: comp.ogz at gmail.com (=?utf-8?q?O=C4=9Fuz_Yar=C4=B1mtepe?=)
Date: Thu, 16 Aug 2007 10:42:28 +0300
Subject: python socket usage
Message-ID: <200708161042.29304.comp.ogz@gmail.com>


Is it possible to send a data object like a tuple or a list in socket 
programming? If so how? It seems with socket module it is only possible to 
send strings. 


-- 
O?uz Yar?mtepe
http://www.yarimtepe.com/en


From bronger at physik.rwth-aachen.de  Mon Aug  6 01:49:44 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Mon, 06 Aug 2007 07:49:44 +0200
Subject: Setting default output encoding
Message-ID: <871wehky9z.fsf@wilson.homeunix.com>

Hall?chen!

I start a python script with subprocess from another Python script
with

    python = subprocess.Popen(["python", "myscript.py"],
                              stdout=subprocess.PIPE, stderr=subprocess.PIPE)

However, this child script has sys.stdout.encoding set to None,
which means that Unicode strings cannot be printed without trouble.
I tried

    environment = os.environ
    environment["LC_CTYPE"] = environment["LANG"] = "de_DE.UTF-8"
    python = subprocess.Popen(["python", "myscript.py"],
                              env = environment,
                              stdout=subprocess.PIPE, stderr=subprocess.PIPE)

for setting it to UTF-8, however, it didn't work.  Any idea on how
to achieve this?

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From steve at holdenweb.com  Thu Aug 23 00:11:29 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 23 Aug 2007 00:11:29 -0400
Subject: Learning Python using a book based on version 1.5
In-Reply-To: <FI3zi.10911$3x.7829@newssvr25.news.prodigy.net>
References: <1187814437.775758.159510@e9g2000prf.googlegroups.com>
	<FI3zi.10911$3x.7829@newssvr25.news.prodigy.net>
Message-ID: <faj1e2$o7g$1@sea.gmane.org>

James Stroud wrote:
> dogatemycomputer at gmail.com wrote:
>> Greetings,
>>
>> A friend of mine dropped off a copy of Sams Teach Yourself Python in
>> 24 Hours published in 2000.  I skimmed the first couple of chapters
>> looking for the interpreter version and the book was based on version
>> Python version 1.5.
>>
>> Is this book still relevant?   Should I toss it and look for something
>> newer?
>>
>> Any thoughts would be appreciated.
>>
>> Best Regards,
>> Dave
>>
> 
> If you want to make a decision based on a quorum, I would suggest to not 
> bother with that book. Yes the SAMS TY books are usually great 
> (especially anything Laura Lemay), but you if you use a 1.5 book, you 
> will be learning some stuff you will *need* to unlearn at the expense of 
> learning things you should know.
> 
> I think the online tutorial is the way to go, or the newest Learning 
> Python from Lutz. After that, check out TPIP (Mertz) or the Programming 
> Python book from Lutz (for a global-esque view of the python world). 
> Maybe even think about the Cookbook (ed. Martelli).
> 
> Dive-Into-Python starts with one of those "Don't worry about what all 
> this means" examples, which I tend to hate and so I never got passed the 
> first example--it may get better as you go judging from all of its 
> proponents.
> 
I'm not sure I'd agree here. Certainly you will learn things that can be 
updated as you get to newer versions of Python, but there are relatively 
few backward incompatibilities, so your code will mostly work in newer 
versions without (too many) modifications.

By all means look for something newer, but don't let that search stop 
you from getting started with the book you have.

Andrew Kuchling has written a great series of "What's new in Python X.Y" 
articles that can bring you up to date relatively quickly once you are 
fluent in version 1.5. Start with:

   http://www.python.org/download/releases/2.0/new-python

And welcome to the Python community.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From timid.gentoo at gmail.com  Mon Aug 13 06:07:14 2007
From: timid.gentoo at gmail.com (_spitFIRE)
Date: Mon, 13 Aug 2007 05:07:14 -0500
Subject: retrieving ATOM/FSS feeds
In-Reply-To: <1i2s7c9.13bkwbfsd3mbqN%raims@dot.com>
References: <f9oecg$249v$1@sxnews1.qg.com>
	<1i2s7c9.13bkwbfsd3mbqN%raims@dot.com>
Message-ID: <f9p9vr$2bb7$1@sxnews1.qg.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Lawrence Oluyede wrote:
> If the content producer doesn't provide the full article via RSS/ATOM
> there's no way you can get it from there. Search for full content feeds
> if any, otherwise get the article URL and feed it to BeautifulSoup to
> scrape the content.
> 

For the same feed (where the content producer doesn't provide the full
article!) I was able to see the complete post in other RSS aggregators (like
Blam). I wanted to know how they were able to collect the feed!

I knew for sure that you can't do screen scraping separately for each and
every blog and that there has be a standard way or atleast that blogs
maintain a standard template for rendering posts. I mean if each of the site
only offered partial content and the rest had to be scraped from the page,
and the page maintained a non-standard structure which is more likely, then
it would become impossible IMHO for any aggregator to aggregate feeds!

I shall for now try with BeautifulSoup, though I'm still doubtful about it.

- --
_ _ _]{5pitph!r3}[_ _ _
__________________________________________________
?I'm smart enough to know that I'm dumb.?
  - Richard P Feynman
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Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFGwC1SA0th8WKBUJMRAs4eAJ0bLJVzEZls1JtE6e8MUrqdapXGPwCfVO02
yYzezvhJFY1SDHUGxrJdR5M=
=rfLo
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From attn.steven.kuo at gmail.com  Wed Aug 29 11:15:16 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Wed, 29 Aug 2007 08:15:16 -0700
Subject: strange list comprehension on generator
In-Reply-To: <mailman.105.1188396882.28954.python-list@python.org>
References: <mailman.105.1188396882.28954.python-list@python.org>
Message-ID: <1188400516.913614.129770@q4g2000prc.googlegroups.com>

On Aug 29, 6:50 am, Roland Puntaier <Roland.Punta... at br-
automation.com> wrote:
> def changeOne(aa,idx):
>   aa[idx]=not aa[idx]
>   yield aa
>   for i in range(idx):
>     for x in changeOne(aa,i):
>       yield x
>
> def changeOneOrder(aa):
>   yield aa
>   for i in range(len(aa)):
>     for x in changeOne(aa,i):
>       yield x
>
> a=[False]*3
> og=changeOneOrder(a)
> #this does not return the way I would expect. why?
> list(og)
> #returns
> #[[False, False, True], [False, False, True], [False, False, True],
> [False, False, True], [False, False, True], [False, False, True], [False,
> False, True], [False, False, True]]


If you want the "intermediate" states of 'a' in
list(og), then you need to yield a copy of that list,
instead of the list itself:

def changeOne(aa, idx):
    aa[idx] = not aa[idx]
    yield aa[:] # <------- a copy
    for i in range(idx):
        for x in changeOne(aa, i):
            yield x

def changeOneOrder(aa):
    yield aa[:] # <------- a copy
    for i in range(len(aa)):
        for x in changeOne(aa, i):
            yield x

a = [False] * 3
og = changeOneOrder(a)
print list(og)

Otherwise, as you've already noticed, you can
loop over the iterator and do something
with the "instantaneous" state of 'a'.

--
Hope this helps,
Steven




From lycka at carmen.se  Wed Aug  1 07:13:19 2007
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 01 Aug 2007 13:13:19 +0200
Subject: Python end of file marker similar to perl's __END__
In-Reply-To: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
Message-ID: <f8ppsf$mrb$1@wake.carmen.se>

beginner wrote:
> Hi All,
> 
> This is just a very simple question about a python trick.
> 
> In perl, I can write __END__ in a file and the perl interpreter will
> ignore everything below that line. This is very handy when testing my
> program. Does python have something similar?

raise SystemExit() exits the program at that point (unless you
catch the exception...) "import sys;sys.exit(0)" is basically
another spelling of the same thing. It doesn't mean that the
interpreter ignores the rest of the file though, so it will
complain about syntax in the whole file.

Since I don't usually write linear top-to-bottom scripts in Python,
I don't really see the use of splitting a file in an interpreted
top and an ignored bottom though.

I'd suggest employing a test driven approach to development. Then
you don't usually have big chunks of code that you don't want to
run. All that's there works (almost)...

See e.g. 
http://powertwenty.com/kpd/downloads/TestDrivenDevelopmentInPython.pdf


From horpner at yahoo.com  Wed Aug  1 10:51:34 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 01 Aug 2007 14:51:34 GMT
Subject: Python end of file marker similar to perl's __END__
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
	<1185976656.753817.27980@x40g2000prg.googlegroups.com>
Message-ID: <slrnfb17m5.224.horpner@FIAD06.norwich.edu>

On 2007-08-01, beginner <zyzhu2000 at gmail.com> wrote:
> Thanks everyone for responding. It doesn't look like python has
> it. I would definitely miss it. As Steve said, the nice thing
> about __END__ is that things below __END__ do not have to have
> legit syntax. That let me focus on the lines of code I am
> debugging and do not have to worry about some bad syntax down
> the line. This feature is especially handy if I am, saying,
> replacing modoules or changing data structures.

A C-like trick might be helpful while refactoring:

<working code>
if False:
   <non-working code>

You have to indent all the non-working code by one level, but
with a good editor that's a snap.

Python will still parse the following lines (it must be valid
Python syntax), but the resulting parse tree won't be executed.

-- 
Neil Cerutti


From rrs at researchut.com  Thu Aug 16 13:25:26 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Thu, 16 Aug 2007 22:55:26 +0530
Subject: Module imports during object instantiation
References: <4c3vo4-u7k.ln1@learner.hq.netapp.com>	<mailman.1931.1187030415.22759.python-list@python.org>	<46c16ec9$0$405$426a34cc@news.free.fr>	<mailman.1956.1187091452.22759.python-list@python.org>	<slrnfc36p9.21o.horpner@FIAD06.norwich.edu>	<mailman.1965.1187101832.22759.python-list@python.org>	<slrnfc3gg4.1l4.horpner@FIAD06.norwich.edu>	<mailman.2025.1187200876.22759.python-list@python.org>	<slrnfc6ieo.14k.horpner@FIAD06.norwich.edu>	<1187205375.871837.254400@r34g2000hsd.googlegroups.com>
	<1187206998.252482.300780@a39g2000hsc.googlegroups.com>
	<fa02qa$l3k$1@sea.gmane.org>
Message-ID: <6tdep4-0hf.ln1@learner.hq.netapp.com>

Steve Holden wrote:

> Ritesh Raj Sarraf wrote:
>> On Aug 16, 12:16 am, Ritesh Raj Sarraf <r... at researchut.com> wrote:
>>> On Aug 15, 11:42 pm, Neil Cerutti <horp... at yahoo.com> wrote:
>>>
> [...]
>> Oops!!! Looks like I completely missed this. It _did_ print the error
>> message.
>> Apologies to all for not keeping a close eye on the error message.
>> 
> Quite. It was obvious to many readers that you were fooling yourself
> with a false hypothesis. The probability of something so fundamental
> being wrong is vanishingly small.
> 

Yes, and now I realize how I would have got into the stupid assumption that
imports were never executed in a class' __init__() was because:

* I defined an import within a class' __init__()
* It used to get executed.
* Then I used to make an assumption that calling it from one of the methods
would work. But instead the module was never in the Namespace. And that led
me to the mis-understanding that the import never got executed. What a fool
am I.


I think people gave a good reason when they mentioned about top-level
imports. I would move ahead with keeping things simple.

Thanks to all for your time and patience on this thread (At least, no one is
yelling at me ;-)


Ritesh
-- 
If possible, Please CC me when replying. I'm not subscribed to the list.



From martin at v.loewis.de  Thu Aug 16 03:06:51 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 16 Aug 2007 09:06:51 +0200
Subject: threads, mutual exclusion, and lists
In-Reply-To: <mailman.2039.1187219345.22759.python-list@python.org>
References: <1187206583.255588.57920@e9g2000prf.googlegroups.com>
	<mailman.2039.1187219345.22759.python-list@python.org>
Message-ID: <46C3F78B.9080305@v.loewis.de>

>> My question is -- are python list operations atomic? If they are not,
>> then I assume I need to put some mutual exclusion around the append()
>> and pop() calls ?
> 
> They are not, but there is one included in the standard library:
> http://docs.python.org/dev/lib/module-Queue.html

Why do you think they are not?

Regards,
Martin


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  2 03:55:07 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 02 Aug 2007 09:55:07 +0200
Subject: Emacs + python
In-Reply-To: <4vasi.139194$wG2.61677@newsfe17.lga>
References: <ak8x8v2udo.fsf@googlemail.com>
	<mailman.1476.1186017909.22759.python-list@python.org>
	<4vasi.139194$wG2.61677@newsfe17.lga>
Message-ID: <46b18ddb$0$25330$426a34cc@news.free.fr>

hg a ?crit :
(snip)
> Are there any cscope & ECB equivalent for Python ?

ECB (assuming we're talking about the same thing, ie Emacs Code Browser) 
works just fine with Python.



From http  Thu Aug 16 03:33:26 2007
From: http (Paul Rubin)
Date: 16 Aug 2007 00:33:26 -0700
Subject: ElementTree surprise
References: <7xd4xoxf16.fsf@ruckus.brouhaha.com>
	<87bqd89gkd.fsf@wilson.homeunix.com>
	<7x4pj0xax0.fsf@ruckus.brouhaha.com>
	<46c3fa3a$0$16098$9b4e6d93@newsspool1.arcor-online.net>
Message-ID: <7xfy2kx7ax.fsf@ruckus.brouhaha.com>

Stefan Behnel <stefan.behnel-n05pAM at web.de> writes:
> So it's not even an ElementTree thing. ET just doesn't know what
> exactly was in the original XML byte stream. A very simple way to
> make sure you always get a string back is
>     >>> text = element.text or ""

Thanks, I ended up doing something like that.  What I wondered about
the standard was whether it specified that parrot had no text node,
as opposed to having an empty text node.  I guess it doesn't matter,
it just caught me by surprise.


From martin at v.loewis.de  Mon Aug  6 01:44:39 2007
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Mon, 06 Aug 2007 07:44:39 +0200
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <87y7gpr33a.fsf@pobox.com>
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
Message-ID: <46b6b548$0$26184$9b622d9e@news.freenet.de>

John J. Lee schrieb:
> "Martin v. L?wis" <martin at v.loewis.de> writes:
> [... snip stuff I don't follow ...]
>> However, it *is* a design goal to make 2.6 so that transition to
>> 3k becomes simpler. That's not a 3k feature, but a 2.6 one.
> 
> Not sure I care about this sort of thing for the purpses of my
> question.  I just wanted to know: is it easy to make my code so it
> runs on 2.6 and 3.0, without funny stuff like a code translator?
> Seems wikipedia said "yes" and Guido said "no".

Neither of these are qualified to make any statements about your
code. Only you can find out yourself. OTOH, neither of these *did*
make any statement about *your* code.

Regards,
Martin


From steve at holdenweb.com  Wed Aug  1 11:31:49 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 01 Aug 2007 11:31:49 -0400
Subject: Floats as keys in dict
In-Reply-To: <1i25pz7.3m2bya88wujkN%aleax@mac.com>
References: <u1wenwq26.fsf@rkspeed-rugby.dk>
	<1i25pz7.3m2bya88wujkN%aleax@mac.com>
Message-ID: <f8q917$6th$1@sea.gmane.org>

Alex Martelli wrote:
> Brian Elmegaard <brian at rkspeed-rugby.dk> wrote:
> 
>> I am making a script to optimiza by dynamic programming. I do not know
>> the vertices and nodes before the calculation, so I have decided to
>> store the nodes I have in play as keys in a dict.
>>
>> However, the dict keys are then floats and I have to round the values
>> of new possible nodes in each step. When profiling I see that the most
>> time consuming part of my script is rounding.
>>
>> Is there a faster way than round() or is there a better way to test
>> than 'in' or should I store the keys in another way than a dict?
> 
> You may want to consider keeping a sorted list and using standard
> library module bisect for searches and insertions -- its behavior is
> O(log N) for a search, O(N) for an insertion, but it might be that in
> your case saving the rounding could be worth it.
> 
> Otherwise, you need to consider a different container, based either on
> comparisons (e.g. AVL trees, of which there are several 3rd party
> implementations as Python extensions) or on a hashing function that will
> give the same hash for two numbers that are "close enough" (e.g., hash
> ignoring the lowest N bits of the float's mantissa for some N).
> 
That might be a bit dangerous in cases close to changes in exponent, 
though, where you could get numbers that were very close but had hugely 
different mantissa values because their exponents were one different, no?

> round() operates on decimals and that may not be as fast as working on
> binary representations, but, to be fast, a helper function giving the
> "hash of a binary-rounded float" would have to be coded in C (or maybe
> use psyco).
> 
Your first suggestion was better, I think. Bisect would do the job. I 
have always thought that dict's numerical index semantics were suspect, 
but it's probably way too late to alter that now. [I'm assuming that 
Py3.0 is retaining the numerical equivalence relations].

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From gur.tom at gmail.com  Tue Aug 28 08:45:07 2007
From: gur.tom at gmail.com (Tom Gur)
Date: Tue, 28 Aug 2007 12:45:07 -0000
Subject: Embedding the python interpreter
Message-ID: <1188305107.028128.136960@d55g2000hsg.googlegroups.com>

Hey,

Do you know an easy way to embed the python interpreter in a python
program (so a non-technical user, which has no idea how to install the
python interpreter would be able to run the script as an executable) ?



From BerndWill at googlemail.com  Sat Aug 11 05:04:36 2007
From: BerndWill at googlemail.com (OpenPavilion)
Date: Sat, 11 Aug 2007 09:04:36 -0000
Subject: question: howto transfer objects between server and client?
Message-ID: <1186823076.923464.294120@57g2000hsv.googlegroups.com>

Hello community,

maybe one of you can help me out with a question regarding the
transfer of objects betwen client an server:
I have three files:

####### ClassA.py #######
class ClassA:
    def setA(self, newA):
        self.a = newA
    def getA(self):
        return self.a

####### client.py #######
import xmlrpclib
from ClassA import *
a = ClassA()
a.setA(4711)
server = xmlrpclib.ServerProxy("http://localhost:8888")
print server.getA(a)        # <= here I would like to hand over an
object

####### server.py #######
import SimpleXMLRPCServer
from ClassA import *
class Handler:
	def getA(self, aClass):
		return aClass.getA()   # <- XMLRPC only transports simple types and
dictionaries, but no objects
handler_object = Handler()
server = SimpleXMLRPCServer.SimpleXMLRPCServer(("localhost", 8888))
server.register_instance(handler_object)
print "Listening on port 8888"
server.serve_forever()


The problem is, that though I hand a ClassA object to the XMLRPC
server, the server only receives a dictionary (only transfering simple
objects is a XMLRPC feature: http://docs.python.org/lib/module-xmlrpclib.html)

Since XMLRPC has limited features:  Is there any other server/client
technique to transfer objects (not strings, or dictionaries, but self
defined object types) ?

Regards
Bernd



From python at jayloden.com  Sun Aug  5 12:54:35 2007
From: python at jayloden.com (Jay Loden)
Date: Sun, 05 Aug 2007 12:54:35 -0400
Subject: Submit web form only client-side with Python? COM?
In-Reply-To: <op.twk1uiqpx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
References: <1186257525.483524.5570@j4g2000prf.googlegroups.com>	<7xmyx7ot0c.fsf@ruckus.brouhaha.com>
	<46B4FAFF.205@jayloden.com>
	<op.twk1uiqpx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
Message-ID: <46B600CB.8010002@jayloden.com>

Gabriel Genellina wrote:
> En Sat, 04 Aug 2007 19:17:35 -0300, Jay Loden <python at jayloden.com>  
> escribi?:
> 
>> Paul Rubin wrote:
>>> goldtech <goldtech at worldpost.com> writes:
>>>> So I can present the user with an HTML form in it - but how can I
>>>> write the form data to a local file on my work station?
>>> The simplest way is with the cgi and CGIHTTPServer modules.  You'd
>>> write your form in an html file, with the target set to a Python
>> CGIHTTPServer is not available on Windows (OP said they are on Win XP)
> 
> CGIHTTPServer does work on Windows (even on Python 2.1, as far as I can  
> go) and using it might be simple enough.

Hrm, if so then it's a documentation bug. That's actually good news then in this
case :-)
(see http://www.python.org/doc/2.1/lib/module-CGIHTTPServer.html )

[snip...]

> I can't see any other reply from you on this thread... (I'm using the  
> gmane newsgroup interfase)

It's under the title "Client-side HTML form processing with Python?", apparently
the same post is listed twice or something like that.

-Jay



From bdesth.quelquechose at free.quelquepart.fr  Fri Aug 24 09:39:26 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 24 Aug 2007 15:39:26 +0200
Subject: some problems with mod_python
In-Reply-To: <1188245587.129794.258250@z24g2000prh.googlegroups.com>
References: <1188245587.129794.258250@z24g2000prh.googlegroups.com>
Message-ID: <46d337a1$0$422$426a74cc@news.free.fr>

Johan a ?crit :
> Hi
> 
> I have installed and tested this on centos, fedora and freebsd all
> give the same problem so I guess I missed some steps.
> 
> I have compiled bot apache (2.2.4) and mod_python (3.3.1) according to
> the docs and no problem with this.
> But when I have made everything about testing mod_python an browse to
> http://server/test and there expecting to see "Hello world" I instead
> get an index of contents in this directory. If I go to  http://server/test/mptest.py
> it works. No errors in any log either.
> 
> What Have I missed?

The difference between AddHandler and SetHandler in apache's conf.

> This I added to httpd.conf
> <Directory /opt/site/htdocs/test>
>         AllowOverride All
>         AddHandler mod_python .py
>         PythonHandler mptest
>         PythonDebug On
> </Directory>

Your problem is with Apache configuration, not with mod_python. The 
AddHandler directive maps <dirpath>/*.py to your handler. So you have to 
call <anythinghere>.py to trigger the desired behaviour. If you want 
*any* url under <dirpath> to be handled by mptest, you need to use 
SetHandler, not AddHandler.


From python at jayloden.com  Wed Aug  1 18:49:14 2007
From: python at jayloden.com (Jay Loden)
Date: Wed, 01 Aug 2007 18:49:14 -0400
Subject: Bug in Time module, or in my understanding?
In-Reply-To: <f8qvua$pa5$1@sea.gmane.org>
References: <f8qvua$pa5$1@sea.gmane.org>
Message-ID: <46B10DEA.4050005@jayloden.com>

Joshua J. Kugler wrote:
> I am getting results like these with the time module:
> 
>>>> import time
>>>> int(time.mktime(time.strptime('2007-03-11 02:00:00', '%Y-%m-%d %H:%M
> %S')))
> 1173610800
>>>> int(time.mktime(time.strptime('2007-03-11 03:00:00', '%Y-%m-%d %H:%M
> %S')))
> 1173610800
>>>> time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(1173610800))
> '2007-03-11 03:00:00'
> 
> I know it probably has something to do with daylight savings, but how can I
> get back out that which I put in?  The times concerned are all standard
> time, so how can I keep the time module from asserting its belief that I
> want to convert to daylight savings?
> 
> Incidentally, it only happens with times on 2007-03-11  from 02:00:00 to
> 02:59:59, and not with time data from past years.

I *think* what's happening is that time.strptime() is setting the DST flag to "-1" for Unknown. The docs say this happens by default if it's not specified in the string:

>>> time.strptime('2007-03-11 02:00:00', '%Y-%m-%d %H:%M:%S')
(2007, 3, 11, 2, 0, 0, 6, 70, -1)
>>> time.strptime('2007-03-11 03:00:00', '%Y-%m-%d %H:%M:%S')
(2007, 3, 11, 3, 0, 0, 6, 70, -1)

If you try calling time.mktime() with the flag unset you get the same result for both (note that I'm in an eastern time zone so it doesn't match yours exactly), and if it's set, you get a different result:

>>> time.mktime((2007, 3, 11, 3, 0, 0, 6, 70, -1))
1173596400.0
>>> time.mktime((2007, 3, 11, 2, 0, 0, 6, 70, 0))
1173596400.0
>>> time.mktime((2007, 3, 11, 2, 0, 0, 6, 70, 1))
1173592800.0

Not sure what your input is from, but can you maybe change the string to include the time zone?

>>> time.mktime(time.strptime('2007-03-11 03:00:00 EST', '%Y-%m-%d %H:%M:%S %Z'))
1173600000.0
>>> time.mktime(time.strptime('2007-03-11 02:00:00 EST', '%Y-%m-%d %H:%M:%S %Z'))
1173596400.0

Hope some of this helps

-J


From steve at holdenweb.com  Wed Aug  8 11:22:54 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Aug 2007 11:22:54 -0400
Subject: Seek the one billionth line in a file containing 3 billion lines.
In-Reply-To: <4866bea60708080658l170bd9eevd86cf58dbc1eddd8@mail.gmail.com>
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>	<7xzm12o7o7.fsf@ruckus.brouhaha.com>	<1186555297.877273.40540@o61g2000hsh.googlegroups.com>	<874pja70p5.fsf@benfinney.id.au>
	<4866bea60708080658l170bd9eevd86cf58dbc1eddd8@mail.gmail.com>
Message-ID: <46B9DFCE.7000505@holdenweb.com>

Chris Mellon wrote:
> On 8/8/07, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
>> Sullivan WxPyQtKinter <sullivanz.pku at gmail.com> writes:
>>
>>> On Aug 8, 2:35 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>>>> Sullivan WxPyQtKinter <sullivanz.... at gmail.com> writes:
>>>>> This program:
>>>>> for i in range(1000000000):
>>>>>       f.readline()
>>>>> is absolutely every slow....
>>>> There are two problems:
>>>>
>>>>  1) range(1000000000) builds a list of a billion elements in memory
>> [...]
>>>>  2) f.readline() reads an entire line of input
>> [...]
>>> Thank you for pointing out these two problem. I wrote this program
>>> just to say that how inefficient it is to use a seemingly NATIVE way
>>> to seek a such a big file. No other intention........
>> The native way isn't iterating over 'range(hugenum)', it's to use an
>> iterator. Python file objects are iterable, only reading eaach line as
>> needed and not creating a companion list.
>>
>>     logfile = open("foo.log", 'r')
>>     for line in logfile:
>>         do_stuff(line)
>>
>> This at least avoids the 'range' issue.
>>
>> To know when we've reached a particular line, use 'enumerate' to
>> number each item as it comes out of the iterator.
>>
>>     logfile = open("foo.log", 'r')
>>     target_line_num = 10**9
>>     for (line_num, line) in enumerate(file):
>>         if line_num < target_line_num:
>>             continue
>>         else:
>>             do_stuff(line)
>>             break
>>
>> As for reading each line: that's unavoidable if you want a specific
>> line from a stream of variable-length lines.
>>
> 
> The minimum bounds for a line is at least one byte (the newline) and
> maybe more, depending on your data. You can seek() forward the minimum
> amount of bytes that (1 billion -1) lines will consume and save
> yourself some wasted IO.

Except that you will have to count the number of lines in that first 
billion characters in order to determine when to stop.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From joshua at eeinternet.com  Wed Aug  1 19:08:36 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 01 Aug 2007 15:08:36 -0800
Subject: Bug in Time module, or in my understanding?
References: <mailman.1456.1186005796.22759.python-list@python.org>
	<1186008332.730742.56520@w3g2000hsg.googlegroups.com>
Message-ID: <f8r3pk$43d$1@sea.gmane.org>

On Wednesday 01 August 2007 14:45, Paul Boddie wrote:
> Well, I think that if you inspect the result of strptime, you'll see
> that the last element of the time "tuple" - in fact, the tm_isdst
> member of a time "structure" - is set to -1:
> 
>>>> time.strptime('2007-03-11 02:00:00', '%Y-%m-%d %H:%M:%S')
> (2007, 3, 11, 2, 0, 0, 6, 70, -1)
>>>> time.strptime('2007-03-11 03:00:00', '%Y-%m-%d %H:%M:%S')
> (2007, 3, 11, 3, 0, 0, 6, 70, -1)
> 
> What is likely to happen when such results are passed to mktime is
> that the underlying library function will use its discretion in
> determining whether daylight savings time is in operation or not.

That sounds about right.

> By asserting tm_isdst as being 0, the usual apparent interval between
> the times is preserved.

I'll do that.  This isn't so much about DST vs. non-DST (as I may be putting
values in here that were recorded during DST), but in this case it was just
trying to get the same value out that I had put in.

Thanks for the pointers!

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From labrach at gmail.com  Fri Aug 31 07:54:17 2007
From: labrach at gmail.com (labrach at gmail.com)
Date: Fri, 31 Aug 2007 11:54:17 -0000
Subject: python + gcov
In-Reply-To: <mailman.173.1188512886.28954.python-list@python.org>
References: <1188404571.590476.265840@r34g2000hsd.googlegroups.com>
	<1188472743.570376.120390@o80g2000hse.googlegroups.com>
	<mailman.173.1188512886.28954.python-list@python.org>
Message-ID: <1188561257.559682.255040@19g2000hsx.googlegroups.com>


> I always bit the bullet and finally just did that.

and here the steps to follow ...
http://plexity.blogspot.com/2006/02/profiling-python-extensions.html

laurent




From grante at visi.com  Wed Aug 15 18:13:52 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 15 Aug 2007 22:13:52 -0000
Subject: wxPython before MainLoop
References: <13bl9a75laqcm70@corp.supernews.com>
	<13bnh5bs4b9h427@corp.supernews.com>
	<5i3b1jF3n5bdtU1@mid.individual.net>
	<13c1v79hs0dob3@corp.supernews.com>
	<mailman.1948.1187055857.22759.python-list@python.org>
	<13c27q5meq90lb2@corp.supernews.com>
Message-ID: <13c6ul0g7crj8a4@corp.supernews.com>

On 2007-08-14, [david] <david at nospam.spam> wrote:

> Steve, it wasn't me that raised the comparison
> with MFC. If you don't think that's a helpful
> comparison, why not reply to that post instead?
>
> I don't mind Bj?rn's suggestion that I don't
> know what I'm talking about, because I started
> it by telling him he was wrong.
>
> But you don't have that excuse.
>
> (david)

Oh dear, arguing with Steve Holden is a rather inauspicious way
to start out in c.l.p.

-- 
Grant Edwards                   grante             Yow! CHUBBY CHECKER just
                                  at               had a CHICKEN SANDWICH in
                               visi.com            downtown DULUTH!


From jingwu.mail at gmail.com  Tue Aug  7 20:18:32 2007
From: jingwu.mail at gmail.com (jingwu.mail at gmail.com)
Date: Wed, 08 Aug 2007 00:18:32 -0000
Subject: step through .py file in a .NET application written in C# in
	Visual Studio
In-Reply-To: <1186493064.496160.296460@b79g2000hse.googlegroups.com>
References: <1186438925.541501.235800@g4g2000hsf.googlegroups.com>
	<1186493064.496160.296460@b79g2000hse.googlegroups.com>
Message-ID: <1186532312.523393.189010@l70g2000hse.googlegroups.com>

On Aug 7, 9:24 am, Paul McGuire <pt... at austin.rr.com> wrote:
> On Aug 6, 5:22 pm, Bo <bohema... at gmail.com> wrote:
>
>
>
> > Hello All,
>
> > I am experimenting IronPython in Visual Studio.  Here is what I have,
> > what I did and what I want
>
> > 1.  I have installed Visual Studio SDK 4.0 according to thisbloghttp://blogs.msdn.com/aaronmar/archive/2006/02/16/a-bit-more-on-ironp...
>
> > If I run Visual Studio under Experimental Hive, aPythonfile opened
> > is color coded.
>
> > 2.  Also, my computer has apparently installed some IronPython DLL
> > because my Visual Studio can recoginize the following class:
> > IronPython.Hosting.PythonEngine.
>
> > If I declare something like the following in Visual Studio:
>
> > public static class MyPythonClass {
> >    private static IronPython.Hosting.PythonEngine   MY_ENGINE;
> >   //suppose I have created an instance of PhythonEngine and assigned
> > to MY_ENGINE
> >    ............
>
> > }
>
> > If I do "Go to Definition" of PythonEngine, I can navigate to the
> > Definition of PythonEngine, but it is from MetaData.
>
> > 3.  In my .NET application (written in C#) , I can invoke the
> > execution of an externalpythonfile using something like:
> > MyPythonClass.MY_ENGINE.ExecuteFile("myPythonFileWithAbsolutePath.py")
>
> > Thepythonfile (myPythonFileWithAbsolutePath.py) can be executed all
> > right, but I want to step through it to debug it.  Any suggestions on
> > how to do it?
>
> > Thanks abunch.
>
> > Bo
>
> Um, make sure you compile with debug?
>
> I have coded in Boo, which is veryPython-like, and it will step
> through the debugger just fine, so IP should do the same in theory.
> But I've not used IP, so all I can give are generic "are you sure it's
> plugged in?" type of suggestions.
>
> Hmm, upon rereading your post, I see that you want the debugger to
> step through a separate file that was executed using ExecuteFile.
> Unless there are some debug options on ExecuteFile, I'd say your
> chances are slim, since the file being executed is not really part of
> the image being debugged.  You could also try explicitly invoking the
> debugger from within the file that you are loading, using (this works
> from Boo):
>
>     System.Diagnostics.Debugger.Launch()
>     System.Diagnostics.Debugger.Break()
>
> -- Paul


Thanks Paul, for giving me the suggestions.  I will try your
suggestion.

I have been struggling with the most of today.  Here is a summary of
what I have found.  May be useful to other

1.  My IronPython DLL is version 1.1.  It is download here
http://www.codeplex.com/Wiki/View.aspx?ProjectName=IronPython

2.  Apparently, there is a problem with either the ipy.exe or
IronPython.DLL that one cannot step into a function (F11 in visual
studio).  Here is the discussion
http://lists.ironpython.com/pipermail/users-ironpython.com/2007-May/004957.html

I am not sure if this is related to my case.

3.  Here is Jim Hugunin's presentation
http://msdn.microsoft.com/msdntv/episode.aspx?xml=episodes/en/20051110PythonJH/manifest.xml

Apparently, he can step through the external ironpython file in an C#
application.  He probably used an old version of Iron Python.  The
method he used to execute the external iron python file is
Engine.Runfile()




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Aug 26 17:20:36 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 26 Aug 2007 23:20:36 +0200
Subject: pySerial in a daemon process
References: <1188158581.316824.89360@k79g2000hse.googlegroups.com>
Message-ID: <5je954F3s0nilU1@mid.individual.net>

paul wrote:

> If I put these back in and try to run the daemon, the script fails
> when I try to connect to the serial port, with this error:
> serial.serialutil.SerialException: Could not open port: [Errno 13]
> Permission denied: '/dev/ttyS0'

Did you check the permissions on this file? Often you have to be
member of a "dialout" group or similar to get access.

Regards,


Bj?rn

-- 
BOFH excuse #172:

pseudo-user on a pseudo-terminal



From zzbbaadd at aol.com  Thu Aug 30 19:42:50 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Thu, 30 Aug 2007 16:42:50 -0700
Subject: list index()
In-Reply-To: <87bqcod2gq.fsf@benfinney.id.au>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<87bqcod2gq.fsf@benfinney.id.au>
Message-ID: <1188517370.998114.119940@q4g2000prc.googlegroups.com>

On Aug 30, 4:31 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> zzbba... at aol.com writes:
> > In my case of have done os.listdir() on two directories. I want to see
> > what files are in directory A that are not in directory B.
>
> You get that information unambiguously. It's an exceptional case,
> since there's no index to return, so it throws an exception.
>
> > I have used exceptions in other languages and only do so on logic
> > that should never happen.
>
> You're confusing "assert" ("this should always be true") with
> "exception" ("this is an exception to the the normal flow of this
> process").
>
> An exception isn't "something that should never happen", it's
> something that is entirely possible and needs to be handled somehow.

I don't think that is the definition used across computer science.

It suddenly dawned on me that what would be best would be a contains()
(or IN syntax for those who can't afford to wait) for lists.

if mylist.contains("hello):

>
> --
>  \       "Always do right. This will gratify some people, and astonish |
>   `\                                         the rest."  -- Mark Twain |
> _o__)                                                                  |
> Ben Finney




From pydecker at gmail.com  Sun Aug 12 08:50:25 2007
From: pydecker at gmail.com (Peter Decker)
Date: Sun, 12 Aug 2007 08:50:25 -0400
Subject: Database intensive application
In-Reply-To: <1186895306.237395.189530@z24g2000prh.googlegroups.com>
References: <1186895306.237395.189530@z24g2000prh.googlegroups.com>
Message-ID: <ca55a9900708120550o2ebb838bnb60308fd9964d601@mail.gmail.com>

On 8/12/07, Rohit <rpk.general at gmail.com> wrote:
> I am a novice. I want to know whether Python can be used to develop
> client/server database and web applications like .NET. Which is the
> best book/source to learn Python?

You've already gotten several excellent answers for web applications;
if you need to create client/server desktop database apps, your best
(and AFAIK, only) choice would be Dabo: http://dabodev.com
-- 

# p.d.


From philip at corp.spock.com  Sat Aug 11 18:32:30 2007
From: philip at corp.spock.com (Philip Zigoris)
Date: Sat, 11 Aug 2007 15:32:30 -0700
Subject: Threading problem when many sockets open
Message-ID: <75fd6670708111532g58fc78f6p6f5dc9de590c4d4a@mail.gmail.com>

Hi all,

I have written a socket based service in python and under fairly heavy
traffic it performs really well.  But i have encountered the following
problem: when the system runs out of file descriptors, it seems to
stop switching control between threads.

Here is some more detail:

The system has n+2 threads, where n is usually around 10.  This was
implemented using the 'threading' and 'socket' modules in the python
2.5 standard library.

-- The "master" thread accepts new socket connections and then
enqueues the connection on a Queue (from the standard library).

-- There are n "handler threads" that pop a connection off of the
queue, read some number of bytes (~10), do some processing and then
send ~100 bytes back over the connection and close it.

-- The last thread is just a logging thread that has a queue of
messages that it writes to either stdout or a file.

Under pretty substantial load, the processing is quick enough that the
connections do not pile up very quickly.  But, in some cases they do.
And what I found was that as soon as the size of the Queue of
connections reached a high enough number (and it was always the same),
all of the processing seemed to stay in the "master" thread.  I
created a siege client that opened up 1000+ connections and the server
would go into a state where the master thread repeatedly polled the
socket and printed an error.  The Queue size stayed fixed at 997 even
if i shut down all of the connectionso n the client side.  Under
normal operating conditions, those connections would be detected as
broken in the handler thread and a message would be logged.  So it
seems that the "handler" threads aren't doing anything. (And they are
still alive, i check that in the master thread).

OK.  I hope all of this is clear.  Currently, I've solved the problem
by putting a cap on the queue size and i haven't seen the problem
reoccur.  But it would be nice to understand exactly what went wrong.

Thanks in advance.

-- 
--
Philip Zigoris I SPOCK I 650.366.1165
Spock is Hiring!
www.spock.com/jobs


From michael at jedimindworks.com  Thu Aug 23 16:48:50 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Thu, 23 Aug 2007 13:48:50 -0700
Subject: simple spider in python
In-Reply-To: <1187876014.845912.236690@e9g2000prf.googlegroups.com>
References: <1187876014.845912.236690@e9g2000prf.googlegroups.com>
Message-ID: <F793F204-CE7D-4554-9C61-288E46B6CF37@jedimindworks.com>


On Aug 23, 2007, at 6:33 AM, gmcalendar at gmail.com wrote:

> Hi everybody, i'm new to the forum so: hello everybody (should I say
> "world"?) ^_^
> I'm trying to do a simple spider in python which:
>
> 1) ask google a query
> 2) parse the data
>
> I'm a python newbie so *any* help would be very, very welcommed.
> Thanks in advice!

First thing to know is that google doesn't like the User-agent header  
urllib2 uses by default -- you'll have to masquerade as a browser  
(google throws a 403 error if you connect as 'User-Agent: Python- 
urllib/2.5': look into urllib2.build_opener()).  Second thing to know  
is that the interesting results have class attribute set to "l".

hope this helps,
Michael

---
Asking a person who he *is* ... is not Pythonic!  --Anton Vredegoor






From tommy.nordgren at comhem.se  Mon Aug 20 07:08:21 2007
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Mon, 20 Aug 2007 13:08:21 +0200
Subject: Sorting a list of Unicode strings?
In-Reply-To: <1187542237.139346.6910@o80g2000hse.googlegroups.com>
References: <1187542237.139346.6910@o80g2000hse.googlegroups.com>
Message-ID: <AC47CE5A-F061-4BF1-A653-BD2C3FC70641@comhem.se>


On 19 aug 2007, at 18.50, oliver at obeattie.com wrote:

> Hey Guys,
>
> Maybe I'm missing something fundamental here, but if I have a list of
> Unicode strings, and I want to sort these alphabetically, then it
> places those that begin with unicode characters at the bottom. Is
> there a way to avoid this, and make it sort them properly?
>
> I'm sure that this is the "proper way" programatically with character
> entities etc. - but when I have a list of countries, and I have ?land
> Islands right at the bottom, it just doesn't look right.
>
> Any help would be really appreciated.
>
> Thanks,
> Oliver
>
> --  
> http://mail.python.org/mailman/listinfo/python-list
	That is the correct alfabetic sort order for ?land.
The Swedish letters ? , ? and ? sorts last in Alphabetic order.
-----------------------------------------------------
An astronomer to a colleague:
-I can't understsnad how you can go to the brothel as often as you  
do. Not only is it a filthy habit, but it must cost a lot of money too.
-Thats no problem. I've got a big government grant for the study of  
black holes.
Tommy Nordgren
tommy.nordgren at comhem.se





From multiseed at gmail.com  Tue Aug 21 18:27:43 2007
From: multiseed at gmail.com (Shiao)
Date: Tue, 21 Aug 2007 22:27:43 -0000
Subject: Logging module gives duplicate log entries
In-Reply-To: <fafm57$abl$00$1@news.t-online.com>
References: <1187702248.203917.188570@k79g2000hse.googlegroups.com>
	<mailman.61.1187702909.32294.python-list@python.org>
	<1187731317.661324.244870@k79g2000hse.googlegroups.com>
	<fafm57$abl$00$1@news.t-online.com>
Message-ID: <1187735263.468497.147220@l22g2000prc.googlegroups.com>

Maybe my question wasn't very clear. What I meant is that these four
lines lead in my case to two entries per logged event:

applog = logging.getLogger()
applog.setLevel(logging.DEBUG)
hdl = logging.FileHandler('/tmp/foo.log')
applog.addHandler(hdl)

However if I REPLACE the above by:

logging.basicConfig(level=logging.DEBUG, filename='/tmp/foo.log')

things work as expected.



From kw at codebykevin.com  Wed Aug  8 12:34:35 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Wed, 08 Aug 2007 12:34:35 -0400
Subject: Tkinter or wxpython?
In-Reply-To: <mailman.1750.1186587557.22759.python-list@python.org>
References: <op.tv98rva4wepdt4@ericb.pragmadev>	<mailman.1677.1186412323.22759.python-list@python.org>	<7xlkcopu4r.fsf@ruckus.brouhaha.com>	<7x7io8r6na.fsf@ruckus.brouhaha.com>
	<hgamo4-p2m.ln1@lairds.us>	<46B9DE7B.3050909@codebykevin.com>
	<mailman.1750.1186587557.22759.python-list@python.org>
Message-ID: <46B9F09B.2060903@codebykevin.com>

Chris Mellon wrote:
> On 8/8/07, Kevin Walzer <kw at codebykevin.com> wrote:

> Using Tile, of course, loses you the first major benefit of Tk - that
> it's already included in the standard library. So in this sense it's
> still "ugly old school look and feel" vs "no external dependencies",
> which is the swing decision for many people. People who prefer the Tk
> API, of course, will be happy to use Tile.

Tile has been implemented in the Tk core starting with version 8.5, 
still somewhere between alpha and beta stage. Once 8.5 is out, and 
Python is configured to build against Tk 8.5 (instead of 8.4), it should 
Just Work.
> 
> Also, while you can get (mostly) native *look*, the feel is absent.
> Unless I'm very uninformed, Tile is a theming engine only, and doesn't
> implement platform conventions with regard to behavior (the "feel"
> part of look and feel).

What do you mean here? Things like keyboard accelerators, menu 
placement, and so on? Those things are already natively implemented by 
Tk, and the developer just needs to invoke them. Sometimes some 
conditional code is required for stuff like keyboard accelerators (the 
"tk windowingsytem" command is useful for this), but again, it should 
Just Work.

Or am I missing something?

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From philippe.martin at att.net  Sun Aug 26 19:13:07 2007
From: philippe.martin at att.net (hg)
Date: Sun, 26 Aug 2007 23:13:07 GMT
Subject: SCF (Python Smar Card Framework)
Message-ID: <7OnAi.21500$eY.10887@newssvr13.news.prodigy.net>

Dear all,

I am releasing much of my work including SCF (Cross platform Smart Card 
library & Tools) to the GPL license.

If interested, go to http://www.SnakeCard.com/Source.html

I am moving the doc to doxygen and cleaning up the code, so what you'll 
see there will change in the course of the next few weeks - basically 
can only get meaningful info on the classes hierarchy at this stage.
I am looking for a free subversion server resource to put the code ... 
if you know of any.

Some of the work there will be windows-only related (GINA, activeX 
components ...) and the applets JavaCard and BasicCard ... I'm releasing 
these during the next few days.

Regards,

Philippe


From evan at yelp.com  Mon Aug 20 23:42:46 2007
From: evan at yelp.com (Evan Klitzke)
Date: Mon, 20 Aug 2007 20:42:46 -0700
Subject: Retrieving a variable's name.
In-Reply-To: <1187658202.236626.93600@50g2000hsm.googlegroups.com>
References: <1187658202.236626.93600@50g2000hsm.googlegroups.com>
Message-ID: <cfb58d850708202042i514401ebi2cfeb8607012eae@mail.gmail.com>

On 8/20/07, rodrigo <rodrigo.cr at gmail.com> wrote:
> How would I go about retrieving a variable's name (not its value)? I
> want to write a function that, given a list of variables, returns  a
> string with each variable's name and its value, like:
>
> a: 100
> b: 200

Let me preface my response by saying that this is a really weird thing
to do, and almost certainly _not_ what you want to be doing.  If I was
to run across code like this, I'd be appalled ;-)  Here's one way to
do it, however:

def make_dict(*args):
    d = {}
    for arg in args:
        for key, value in globals().iteritems():
            if value is arg:
                d[key] = value
                break
    return d

Note that this returns a dictionary, rather than a string, but this is
trivial to modify.

-- 
Evan Klitzke <evan at yelp.com>


From eugen.wintersberger at jku.at  Thu Aug 16 08:07:47 2007
From: eugen.wintersberger at jku.at (Eugen Wintersberger)
Date: Thu, 16 Aug 2007 14:07:47 +0200
Subject: ctypes and C99 complex numbers
Message-ID: <1187266067.24753.12.camel@wheeler.hlphys.uni-linz.ac.at>

Hi there
 I want to use ctypes in connection with C functions that use complex
datatypes defined in the C99 standard. Does someone know a simple way
how to implement this? Are there any plans to integrate the C99 complex
data types in the ctypes module?

best regards 
  Eugen Wintersberger
-- 
--------------------------------------------
|                                          |
| Dipl. Ing. Eugen Wintersberger           |
| Department of semicondutor physics       |
| University of Linz                       |
| Altenbergerstrasse 69                    |
| A-4040 Linz                              |
| Austria                                  |
|                                          |
| Mobile.: +43 664 3112861                 |
| Tel.: +43 732 2468 9605                  |
| E-Mail.: eugen.wintersberger at jku.at      |
| Skype: eugen20056221                     |
| ICQ: 214418739, nickname: thot           |
|                                          |
--------------------------------------------



From lance.ellinghaus at eds.com  Wed Aug 22 11:43:22 2007
From: lance.ellinghaus at eds.com (Ellinghaus, Lance)
Date: Wed, 22 Aug 2007 11:43:22 -0400
Subject: SpreadsheetML writer??
In-Reply-To: <fahhm1$39o$1@sea.gmane.org>
References: <1187596936.136499.200280@l22g2000prc.googlegroups.com><mailman.5.1187616200.26576.python-list@python.org><46cc26ed$0$432$426a74cc@news.free.fr>
	<fahhm1$39o$1@sea.gmane.org>
Message-ID: <752A61D5C34D41478E638FC92AF9051B014F2FD8@usahm207.amer.corp.eds.com>

Does anyone have or know of a module to write out Excel spreadsheets in
SpreadsheetML format?

Thank you,
lance 


Lance Ellinghaus


From nospam at invalid.com  Sun Aug 19 22:55:33 2007
From: nospam at invalid.com (Jack)
Date: Sun, 19 Aug 2007 19:55:33 -0700
Subject: Parser Generator?
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
	<_6mdnZxbdNKTVFrbnZ2dnUVZ_tqtnZ2d@comcast.com>
	<xHWxi.1073$vU4.633@nlpi068.nbdc.sbc.com>
	<fbadnTQA4qe6F1XbnZ2dnUVZ_s-pnZ2d@comcast.com>
	<1i33g9h.1i48q26dmp7l5N%aleax@mac.com>
Message-ID: <c_KdnQKMS7k6n1TbnZ2dnUVZ_hisnZ2d@comcast.com>

Very interesting work. Thanks for the link!

"Alex Martelli" <aleax at mac.com> wrote in message 
news:1i33g9h.1i48q26dmp7l5N%aleax at mac.com...

> <http://nltk.sourceforge.net/index.php/Main_Page>
>
> """
> NLTK ?? the Natural Language Toolkit ?? is a suite of open source Python
> modules, data sets and tutorials supporting research and development in
> natural language processing.
> """
>
>
> Alex 




From mail at microcorp.co.za  Fri Aug 17 04:08:09 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 17 Aug 2007 10:08:09 +0200
Subject: (sort of) deterministic timing in Python
References: <1i2si8h.1qc8f77i68gyeN%johnmfisher@comcast.net>
	<7xlkcbgto6.fsf@ruckus.brouhaha.com>
Message-ID: <017501c7e0a6$cff9dc40$03000080@hendrik>


 "Paul Rubin" <http://p..id> wrote:


>johnmfisher at comcast.net (John Fisher) writes:
>> mark start time
>> start event
>>         event finishes
>> count time until next interval
>> start second event???
>>
>> rather than this:
>>
>> start event
>>         event finishes
>> sleep for interval
>> start second event
>> ...
>> So how do I accomplish this in Python with a minimum of labour?
>
>Normally I'd use something like:
>
>   from time import time
>
>   t0 = time()
>   start event ... event finishes
>   t1 = time()
>   elapsed = t1 - t0
>   sleep(interval - elapsed)
>   start second event ...
>
>Am I missing something?

Not much - only beware of cases when elapsed is greater than
interval - not sure what time.sleep(negative_number) does.

- Hendrik



From rkmr.em at gmail.com  Fri Aug 10 12:57:05 2007
From: rkmr.em at gmail.com (rkmr.em at gmail.com)
Date: Fri, 10 Aug 2007 09:57:05 -0700
Subject: AttributeError: 'module' object has no attribute 'HTTPSHandler'
Message-ID: <e04d2e90708100957t79ed5a72s259281d912508fc1@mail.gmail.com>

Hi
I built and installed python 2.5 from source and when I do this:

opener = urllib2.build_opener(SmartRedirectHandler(),
DefaultErrorHandler(), urllib2.HTTPSHandler())

I get this error.
AttributeError: 'module' object has no attribute 'HTTPSHandler'

What should I do?


From crosseyedpenguin at digitalrockart.phxcoxmail.com  Sun Aug  5 16:01:40 2007
From: crosseyedpenguin at digitalrockart.phxcoxmail.com (Roger)
Date: Sun, 05 Aug 2007 13:01:40 -0700
Subject: smtplib, gmail, quit vs. close and SSL3_GET_RECORD:wrong version
	number
Message-ID: <E0qti.72966$dI1.38665@newsfe08.phx>

I am having a problem sending email through smtp.gmail.com using 
smtplib.  Everything works and the mail is sent and received, except 
quit.  The following shows the problem (without bothering to login or do 
the sendmail):

>>>> import smtplib
>>>> server = smtplib.SMTP('smtp.gmail.com',25)
>>>> server.ehlo()
> (250, 'mx.google.com at your service, [68.98.218.211]\nSIZE 28311552\n8BITMIME\nSTARTTLS\nENHANCEDSTATUSCODES')
>>>> server.starttls()
> (220, '2.0.0 Ready to start TLS')
>>>> server.ehlo()
> (250, 'mx.google.com at your service, [68.98.218.211]\nSIZE 28311552\n8BITMIME\nAUTH LOGIN PLAIN\nENHANCEDSTATUSCODES')
>>>> server.noop()
> (250, '2.0.0 OK')
>>>> server.quit()
> 
> Traceback (most recent call last):
>   File "<pyshell#6>", line 1, in <module>
>     server.quit()
>   File "c:\Python25\lib\smtplib.py", line 716, in quit
>     self.docmd("quit")
>   File "c:\Python25\lib\smtplib.py", line 378, in docmd
>     return self.getreply()
>   File "c:\Python25\lib\smtplib.py", line 352, in getreply
>     line = self.file.readline()
>   File "c:\Python25\lib\smtplib.py", line 160, in readline
>     chr = self.sslobj.read(1)
> sslerror: (1, 'error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number')
>>>> 

I have not had this problem with other mail servers (but only tried 
two).  A solution for gmail seems to be to replace the server.quit() 
with server.close().  The difference between the two commands is quit() 
sends a 'QUIT' string before calling close().  Because close() is not 
included in the smtplib docs, it does not appear to be the right solution.

What is the correct way to terminate a gmail session?

Roger


From nobody at nowh.ere  Tue Aug 21 17:11:34 2007
From: nobody at nowh.ere (John McGaw)
Date: Tue, 21 Aug 2007 17:11:34 -0400
Subject: Latest models of Gibson guitars
In-Reply-To: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
Message-ID: <%xIyi.22058$aa7.17937@bignews3.bellsouth.net>

mobilendd at gmail.com wrote:
> Reviews of latest models of best guitars, fender, gibson, yamaha, and
> many more, with pictures and prices.

Are these new guitars made of SPAM like your message and your "blog"?


From oliver at obeattie.com  Sun Aug 19 12:50:37 2007
From: oliver at obeattie.com (oliver at obeattie.com)
Date: Sun, 19 Aug 2007 16:50:37 -0000
Subject: Sorting a list of Unicode strings?
Message-ID: <1187542237.139346.6910@o80g2000hse.googlegroups.com>

Hey Guys,

Maybe I'm missing something fundamental here, but if I have a list of
Unicode strings, and I want to sort these alphabetically, then it
places those that begin with unicode characters at the bottom. Is
there a way to avoid this, and make it sort them properly?

I'm sure that this is the "proper way" programatically with character
entities etc. - but when I have a list of countries, and I have ?land
Islands right at the bottom, it just doesn't look right.

Any help would be really appreciated.

Thanks,
Oliver



From pablo.yabo at gmail.com  Fri Aug 10 19:31:37 2007
From: pablo.yabo at gmail.com (Pablo Yabo)
Date: Fri, 10 Aug 2007 20:31:37 -0300
Subject: Threading
Message-ID: <db6698600708101631j51544215reb41b293a065812@mail.gmail.com>

Hello,

I'm trying to
call Python routines from C/C++. These routines must intereact in a
multi-thread environment.
I mean that routine A will loop waiting for a condition of routine B.

This condition are coded in C so I don't need
routine A running in the same interpreter of routine B.

I tried using:

PyEval_AcquireLock();
PyInterpreterState* mainInterpreterState = mainThreadState->interp;
PyThreadState * myThreadState = PyThreadState_New(mainInterpreterState);

PyThreadState_Swap(myThreadState);

... Call Python code here

PyThreadState_Swap(NULL);
PyEval_ReleaseLock();


Obviosly, I called thread initialization code in the main thread like
http://www.linuxjournal.com/article/3641
The problem with this code is that I hold the interpreter lock when calling
routine A or B so they cannot run
simultaneous and that is a requierement for me (as I explained before). It
executes some code of the routine I called but then it hungs.
If I release the lock before calling the Python code it doesn?t work neither
somhow.

Then I tried to create an interpreter for each thread. It is not desirable
but it's acceptable:

PyEval_AcquireLock();
PyThreadState* myThreadState = Py_NewInterpreter();
PyThreadState_Swap(myThreadState);
PyEval_ReleaseLock();

... Call Python code here

PyEval_AcquireLock();
PyThreadState_Swap(NULL);
Py_EndInterpreter(myThreadState);
PyEval_ReleaseLock();


But it doesn't
work. It seems that it requieres to take the lock to call Python code.
If I comment the PyEval_ReleaseLock line and PyEval_AcquireLock
pair it calls other threads before hunging.

I saw some threads talking about some similar situations and I saw no answer
to this.

This issue remains unsolved?


Thanks on advance,
Pablo

--
http://www.nektra.com
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From bill.scherer at verizonwireless.com  Thu Aug 23 07:46:25 2007
From: bill.scherer at verizonwireless.com (Bill Scherer)
Date: Thu, 23 Aug 2007 07:46:25 -0400
Subject: sentance containg the string or symbol =?UTF-8?B?zqk=?=
In-Reply-To: <NYOBGCEXSMTP22GSOAE000f6e1a@NYOBGCEXSMTP22.uswin.ad.vzwcorp.com>
References: <NYOBGCEXSMTP22GSOAE000f6e1a@NYOBGCEXSMTP22.uswin.ad.vzwcorp.com>
Message-ID: <46CD7391.8040002@verizonwireless.com>

yadin wrote:
> how can i print a sentance containg the string or symbol ? in python
> and also lambda?
>
>   
>>> "?"
'\xce\xa9'
>>> print '\xce\xa9'
?
>>>


...works on my terminal anyway.
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From siona at chiark.greenend.org.uk  Tue Aug 14 12:46:03 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 14 Aug 2007 17:46:03 +0100 (BST)
Subject: LEGB rule, totally confused ...
References: <mailman.1959.1187094797.22759.python-list@python.org>
Message-ID: <3u*sChSr@news.chiark.greenend.org.uk>

stef mientki  <stef.mientki at gmail.com> wrote:
>    def Run ():
>        print X                 <=== UnboundLocalError: local variable
>    'X' referenced before assignment
>        X = X + 1
>
>Why do I get the error ?
>Printing isn't assigning anything or am I missing something.
>Now if I remove "X = X + 1" I don't get an error ???

Several people have already explained the scoping rules acting
here, but let's just look at how that error message is telling
you everything you need to know to fix the problem.

"local variable 'X' referenced before assignment"

"local variable 'X'" immediately tells you that the 'X' in
question is not your global 'X'.

"referenced before assignment": well, 'print X' is surely a
reference to 'X', and 'X = X + 1' is an assignment to it,
and 'print X' appears before 'X = X + 1'. That this is the
key you have confirmed experimentally.

The question to ask here is "Why does Python think 'X' is
local?" Everything else is answered by the error message.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
   "Frankly I have no feelings towards penguins one way or the other"
        -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From hyugaricdeau at gmail.com  Thu Aug 30 09:29:06 2007
From: hyugaricdeau at gmail.com (Hyuga)
Date: Thu, 30 Aug 2007 13:29:06 -0000
Subject: Asking all python programmers.
In-Reply-To: <C_fBi.7$ul1.1@newsfe04.lga>
References: <eb79828c0708272042x238f575aq28d01964bf6ab1db@mail.gmail.com>
	<mailman.68.1188314530.28954.python-list@python.org>
	<C_fBi.7$ul1.1@newsfe04.lga>
Message-ID: <1188480546.990325.252350@r29g2000hsg.googlegroups.com>

On Aug 29, 11:09 am, "sjpiii" <sjp... at ya.delete.hoo.com> wrote:
> You mean use correct spelling and grammar?  But what about all the time
> we've spent creating cutesy little non-words like "l8er?"
>
> Actually, I'm less tolerant of those than of normal spelling and grammar
> errors because of the number of posters here for whom english is not their
> native language.

What I find worst of all, however, are people for whom English is not
their first language, *and* they write in lazy, slangy AOL-speak.
Making mistakes is fine, and even being completely incomprehensible is
bearable if it looks like an effort was made to use the language
correctly.  I don't know about anyone else, but when I'm learning a
new language, spoken or programming, I try my best to use it is
correctly as possible given my level of experience with it.  Using
slang and shorthand correctly really requires you to know what you're
doing--sort of like optimizing.



From gandalf at shopzeus.com  Thu Aug 16 16:48:26 2007
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Thu, 16 Aug 2007 22:48:26 +0200
Subject: advice about `correct' use of decorator
In-Reply-To: <46C4B097.4080309@fmed.uba.ar>
References: <46C4B097.4080309@fmed.uba.ar>
Message-ID: <46C4B81A.8000304@shopzeus.com>

Gerardo Herzig wrote:
> Hi all. I guess i have a conceptual question:
> Im planing using a quite simple decorator to be used as a conditional 
> for the execution of the function. I mean something like that:
>
> @is_logued_in
> def change_pass():
>     bla
>     bla
>
> And so on for all the other functions who needs that the user is still 
> loged in.
>
> where obviosly the is_logued_in() function will determine if the dude is 
> still loged in, and THEN execute change_pass(). If the dude is not loged 
> in, change_pass() is NOT executed at all. Instead, it will be redirected 
> to the `login' screen.
>   
Are you developing a website or a GUI program?

   Laszlo



From ocollioud at gmail.com  Fri Aug 24 05:31:40 2007
From: ocollioud at gmail.com (olive)
Date: Fri, 24 Aug 2007 09:31:40 -0000
Subject: Co-developers wanted: document markup language
In-Reply-To: <87mywh717i.fsf@wilson.homeunix.com>
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com>
	<87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com>
	<87tzqp77my.fsf@wilson.homeunix.com>
	<7xy7g1if24.fsf@ruckus.brouhaha.com>
	<87mywh717i.fsf@wilson.homeunix.com>
Message-ID: <1187947900.676122.144490@e9g2000prf.googlegroups.com>

>
> Well, because they are awful.  ;-)  I don't see that there is a
> bunch of already existing projects, in fact, I don't see anyone
> challenging LaTeX at all.  However, competition is a good thing, and
> I think there are enough aspects about LaTeX that can be done better
> so that this project is worth being done.

What about ODF ? (http://www.odfalliance.org/)
Isn't it a good competitor ?

Olive



From mail at microcorp.co.za  Fri Aug 24 05:21:41 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 24 Aug 2007 11:21:41 +0200
Subject: Socket recv(1) seems to block instead of returning end of file.
References: <mailman.164.1187862959.32294.python-list@python.org>
	<13cr4u8mimniub4@corp.supernews.com>
Message-ID: <014f01c7e65d$82cd7b40$03000080@hendrik>

"Grant Edwards" <gr....com> wrote:

> On 2007-08-23, Hendrik van Rooyen <m....ocorp.co.za> wrote:
> 
> > While doing a netstring implementation I noticed that if you
> > build a record up using socket's recv(1), then when you close
> > the remote end down, the recv(1) hangs,
> 
> I don't see that behavior running 2.4 on Gentoo.

I express myself badly - when I say "close down" I don't mean
"close down as in socket.close" I mean "close down as in click on the
tkinter window, or with keyboard interrupt" - sorry for the confusion

> 
> > despite having a short time out of 0.1 set.
> 
> What time out?  A socket's recv method doesn't do timeouts.

If I set a time out, then the recv does not block,
but gives me a timed out exception.

> 
> > If however, you try to receive more than one char, (I tested
> > with 3, did not try 2), then when you shut the remote end down
> > you do not get a time out, but an empty string - the normal
> > end of file, I suppose.
> >
> > Has anybody else seen this behaviour?
> 
> No.  recv(1) works fine for me (Python 2.4 under Gentoo).
> Perhaps you could post a minimal example that doesn't work for
> you?

I am now frustrated - its not as simple as I thought - my application 
still only detects EOF if I do more than recv(1), but I cannot 
demonstrate simply - anyway, I have modified your code to look more 
like my program's code, and it follows below - if it does nothing else, 
it should convince you that recv() *does* time out...

The receiver code below detects if I close the sending console window, 
as well as control-c - Rats!

I will muck around with this more to see if I can get to the bottom of it,
as I can't see anything different between what is below and my program,
except that in both cases the comms are done in threads which are not
the main loop.

- Hendrik

------------------------------------------------------------------------
#!/usr/bin/python

#reader
import socket

HOST = 'Linuxbox' # Symbolic name meaning the local host
PORT = 57001 # Arbitrary non-privileged port
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))
socket.setdefaulttimeout(0.100)

s.listen(1)
conn, addr = s.accept()
print 'Connected by', addr
data = ''
while 1:
    try:
        data = data + conn.recv(1)
    except socket.error,msg:
        if 'timed out' in msg:
            print msg
            continue
        else:
            print 'socket error is',msg
            break
    if not data: break
    if data.endswith('\n'):
        print data
        data = ''
print 'heigh ho the end has come!'
conn.close()


------------------------------------------------------------------------


------------------------------------------------------------------------
#!/usr/bin/python

# writer
import socket,time,random

HOST = 'Linuxbox' # Symbolic name meaning the local host
PORT = 57001 # Arbitrary non-privileged port
socket.setdefaulttimeout(0.100)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

while True:
    try:
        print 'Attempting to connect to server'
        s.connect((HOST, PORT))
        break
    except socket.error, msg:
        time.sleep(5)
        continue
    print 'Connected - Time out is:',s.gettimeout()

data = "The quick brown fox jumps over the lazy dog 0123456789\n"
count = 0
while count < 500:
    try:
        s.send(data)
    except socket.error,msg:
        if 'timed out' in msg:
            print msg
            time.sleep(0.05)
            continue
        else: 
            print 'socket error is:',msg
            break
    print "tx:",len(data)
    time.sleep(random.randint(200,800)/1000.0)
s.close()

------------------------------------------------------------------------







From nepbabucxspamfree at yahoo.ca  Tue Aug 21 22:40:51 2007
From: nepbabucxspamfree at yahoo.ca (Bikal KC)
Date: Wed, 22 Aug 2007 12:10:51 +0930
Subject: Fast socket write
In-Reply-To: <1187744469.240933.149610@r23g2000prd.googlegroups.com>
References: <1187744469.240933.149610@r23g2000prd.googlegroups.com>
Message-ID: <46cba22b$1_1@news.chariot.net.au>

Greg Copeland wrote:
> I'm having a brain cramp right now.  I can't see to recall the name of

Is your cramp gone now ? :P



From steveo at syslang.net  Sat Aug 25 22:54:09 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Sat, 25 Aug 2007 22:54:09 -0400 (EDT)
Subject: Need a better understanding on how MRO works?
In-Reply-To: <1i3evke.1rwf8pn10k1h30N%aleax@mac.com>
References: <mailman.295.1188079346.32294.python-list@python.org>
	<1i3evke.1rwf8pn10k1h30N%aleax@mac.com>
Message-ID: <alpine.LFD.0.999.0708252242450.1739@saturn.syslang.net>

On Saturday, Aug 25th 2007 at 17:19 -0700, quoth Alex Martelli:

=>Steven W. Orr <steveo at syslang.net> wrote:
=>   ...
=>>      name = 'C1'
=>>      nclass = new.classobj(name,(D1,),globals())
=>>      globals()[name] = nclass
=>
=>Here, you're creating a VERY anomalous class C1 whose __dict__ is
=>globals(), i.e. the dict of this module object;
=>
=>>      name = 'C2'
=>>      nclass = new.classobj(name,(D1,),globals())
=>>      globals()[name] = nclass
=>
=>and here you're creating another class with the SAME __dict__;
=>
=>>      globals()[name].m1 = m1replace
=>
=>So of course this assignment affects the 'm1' entries in the dict of
=>both classes, since they have the SAME dict object (a la Borg) -- that
=>is, IF they're old-style classes (i.e. if D1 is old-style), since in
=>that case a class's __dict__ is in fact a dict object, plain and simple.
=>
=>However, if D1 is new-style, then C1.__dict__ and C2.__dict__ are in
=>fact instances of <dictproxy> -- each with a copy of the entries that
=>were in globals() when you called new.classobj, but DISTINCT from each
=>other and from globals(), so that further changes in one (or globals)
=>don't affect globals (nor the other).
=>
=>I guess this might be a decent interview question if somebody claims to
=>be a "Python guru": if they can make head or tails out of this mess, boy
=>the *ARE* a Python guru indeed (in fact I'd accord minor guruhood even
=>to somebody who can get a glimmer of understanding of this with ten
=>minutes at a Python interactive prompt or the like, as opposed to
=>needing to understand it "on paper" without the ability to explore:-).
=>
=>Among the several "don't"s to learn from this: don't use old-style
=>classes, don't try to make two classes share the same dictionary, and
=>don't ask about MRO in a question that has nothing to do with MRO
=>(though I admit that was a decent attempt at misdirection, it wouldn't
=>slow down even the minor-guru in any appreciable way:-).
=>
=>
=>Alex
=>-- 
=>http://mail.python.org/mailman/listinfo/python-list
=>

Thanks Alex. I am humbled, though I was before I started.
I really don't have a lot of understanding of what you're saying so I'll 
probably have to study this for about a year or so.

* (I need to look up what dictproxy is.) I don't have any idea what the 
ramifications are of your use of the word DISTINCT. Are you somehow 
suggesting that new.classobj does a deep copy of the globals copy that's 
passed to it?

* Also, I'd like to understand what the difference is between 
    nclass = new.classobj(name,(D1,),globals())
vs. 
    def classfactory():
	class somename(object):
	    def somestuff():
		pass
        return somename
    G1 = classfactory()
    globals()[name] = G1

Does new.classobj do anything special?

I appreciate your time. 

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From shevitz at lanl.gov  Wed Aug 22 11:23:25 2007
From: shevitz at lanl.gov (Danny)
Date: Wed, 22 Aug 2007 15:23:25 +0000 (UTC)
Subject: instance method questions
Message-ID: <loom.20070822T172031-221@post.gmane.org>

howdy, 

I have created an instance method for an object using new.instancemethod. It
works great. Now the questions are:

1) how do I dynamically inspect an object to determine if it has an instance
method? (there is a class method with the same name)

2) how do I dynamically delete the instance method?

thanks,
Danny



From ptmcg at austin.rr.com  Mon Aug 27 08:40:09 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 27 Aug 2007 05:40:09 -0700
Subject: Parser Generator?
In-Reply-To: <HtCdnaSzROkM1E_bnZ2dnUVZ_tmhnZ2d@comcast.com>
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
	<1188159150.755231.239390@o80g2000hse.googlegroups.com>
	<mailman.11.1188176757.28954.python-list@python.org>
	<1188185192.735485.237740@57g2000hsv.googlegroups.com>
	<HtCdnaSzROkM1E_bnZ2dnUVZ_tmhnZ2d@comcast.com>
Message-ID: <1188218409.525240.300590@o80g2000hse.googlegroups.com>

On Aug 26, 10:48 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> Paul McGuire wrote:
> > On Aug 26, 8:05 pm, "Ryan Ginstrom" <softw... at ginstrom.com> wrote:
> >> The only caveat being that since Chinese and Japanese scripts don't
> >> typically delimit "words" with spaces, I think you'd have to pass the text
> >> through a tokenizer (like ChaSen for Japanese) before using PyParsing.
>
> > Did you think pyparsing is so mundane as to require spaces between
> > tokens?  Pyparsing has been doing this type of token-recognition since
> > Day 1.  Looking for tokens without delimiting spaces was one of the
> > first applications for pyparsing.  This issue is not unique to Chinese
> > or Japanese text.  Pyparsing will easily find the tokens in this
> > string:
>
> > y=a*x**2+b*x+c
>
> > as
>
> > ['y','=','a','*','x','**','2','+','b','*','x','+','c']
>
> The difference is that in the expression above (and in many other
> tokenization problems) you can determine "word" boundaries by looking at
> the class of character, e.g. alphanumeric vs. punctuation vs. whatever.
>
> In Japanese and Chinese tokenization, word boundaries are not marked by
> different classes of characters. They only exist in the mind of the
> reader who knows which sequences of characters could be words given the
> context, and which sequences of characters couldn't.
>
> The closest analog would be to ask pyparsing to find the words in the
> following sentence:
>
> Thepyparsingmoduleprovidesalibraryofclassesthatclientcodeusestoconstructthe?grammardirectlyinPythoncode.
>
> Most approaches that have been even marginally successful on these kinds
> of tasks have used statistical machine learning approaches.
>
> STeVe- Hide quoted text -
>
> - Show quoted text -

Steve -

You mean like this?

from pyparsing import *

knownWords = ['of', 'grammar', 'construct', 'classes', 'a',
    'client', 'pyparsing', 'directly', 'the', 'module', 'uses',
    'that', 'in', 'python', 'library', 'provides', 'code', 'to']

knownWord = oneOf( knownWords, caseless=True )
sentence = OneOrMore( knownWord ) + "."

mush =
"ThepyparsingmoduleprovidesalibraryofclassesthatclientcodeusestoconstructthegrammardirectlyinPythoncode."

print sentence.parseString( mush )

prints:

['the', 'pyparsing', 'module', 'provides', 'a', 'library', 'of',
'classes', 'that', 'client', 'code', 'uses', 'to', 'construct',
'the', 'grammar', 'directly', 'in', 'python', 'code', '.']

In fact, this is almost the exact scheme used by Zhpy for extracting
Chinese versions of Python keywords, and mapping them back to English/
Latin words.  Of course, this is not practical for natural language
processing, as the vocabulary gets too large. And you can get
ambiguous matches, such as a vocabulary containing the words ['in',
'to', 'into'] - the runtogether "into" will always be assumed to be
"into", and never "in to".  Fortunately (for pyparsing), your example
was sufficiently friendly as to avoid ambiguities.  But if you can
select a suitable vocabulary, even a runon mush is parseable.

-- Paul




From steve at holdenweb.com  Thu Aug 30 13:15:46 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 30 Aug 2007 13:15:46 -0400
Subject: Python doesn't see the directories I create
In-Reply-To: <slrnfddha0.1o4.horpner@FIAD06.norwich.edu>
References: <ldvBi.293202$LE1.92748@newsfe13.lga>	<46d6856b$0$17674$426a74cc@news.free.fr>
	<slrnfddha0.1o4.horpner@FIAD06.norwich.edu>
Message-ID: <fb6u06$d4i$1@sea.gmane.org>

Neil Cerutti wrote:
> On 2007-08-30, Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>> mr_gadget a ?crit :
>>> When I create a subfolder, python is not seeing it. Can someone please 
>>> explain this behaviour ? I just started with python, read the tutorial over 
>>> the weekend and am writing my very first script. So I may not be seeing 
>>> something. Both os.path and glob.glob seem not to see a folder I created. 
>>> Other sibling folders seem to work fine. On a whim I tried paths with \\ 
>>> double slashes and that worked. But why should single slashes work for some 
>>> folders and not for others ??
>> s/slash/antislash/g
>>
>> It's a very well known gotcha due to MS's choice to use the
>> antislash as path separator. In most languages - Python
>> included - the antislash is used for escape sequences
>> (non-printable characters). 
> 
> Keeping in mind which came first, isn't it at least as accurate
> to attribute this problem to Python's choice of escape character?
> There were probably advantages to adopting the same escape
> character as other well-known languages/codes, but the choice has
> caused some trouble over the years. 
> 
> To me, Python's collection of special-purpose string literal
> notations is one of its little warts.
> 
> Of course, I'm not smart enough to have delivered the ONE TRUE
> string literal notation either, but I do have a computer and an
> internet connection, so there you are.
> 
Well, it's a wart that's shared with many other languages - including, 
interestingly enough, Microsoft's very own C#, from whose documentation 
the following examples are taken:

string a = "hello, world";                  // hello, world
string b = @"hello, world";                 // hello, world
string c = "hello \t world";                // hello     world
string d = @"hello \t world";               // hello \t world
string e = "Joe said \"Hello\" to me";      // Joe said "Hello" to me
string f = @"Joe said ""Hello"" to me";     // Joe said "Hello" to me
string g = "\\\\server\\share\\file.txt";   // \\server\share\file.txt
string h = @"\\server\share\file.txt";      // \\server\share\file.txt
string i = "one\r\ntwo\r\nthree";

The fact is that some strings are always going to cause trouble. 
Unfortunately programming itself is a task that requires a little more 
knowledge to be applied to the task. Just learn the rules and move on.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From steve at REMOVE.THIS.cybersource.com.au  Fri Aug  3 21:46:52 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 04 Aug 2007 11:46:52 +1000
Subject: How to pass a reference to the current module
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
Message-ID: <pan.2007.08.04.01.46.50.985228@REMOVE.THIS.cybersource.com.au>

On Fri, 03 Aug 2007 17:22:40 -0700, James Stroud wrote:

> Basically, what I am trying to acomplish is to be able to do this in any 
> arbitrary module or __main__:
> 
> 
> funcname = determined_externally()
> ModuleUser.do_something_with(AModule, funcname)
> 
> 
> Ideally, it would be nice to leave out AModule if the functions were 
> designed in the same namespace in which do_something_with is called.

I second Carsten Haese's suggestion that instead of passing function
names, you pass function objects, in which case you don't need the module.
But perhaps you need some way of finding the function, given its name.

def get_function_from_name(name, module=None):
    if module is None:
        # use the current namespace
        namespace = locals() # or globals() if you prefer
    else:
        namespace = module.__dict__
    return namespace[name]


-- 
Steven.



From neokosmos at gmail.com  Sun Aug  5 13:01:46 2007
From: neokosmos at gmail.com (Paul Miller)
Date: Sun, 05 Aug 2007 10:01:46 -0700
Subject: Semantics of thread.error
Message-ID: <1186333306.599950.139160@e16g2000pri.googlegroups.com>

In the language documentation, all that is said about thread.error is
that it's raised "on thread-specific errors."  Is there anywhere a
list of conditions which will cause thread.error to be raised?  (I
mean, other than the thread library C source, of course.)

Thanks!

Paul



From jeremy+complangpython at jeremysanders.net  Sat Aug 25 05:28:40 2007
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Sat, 25 Aug 2007 10:28:40 +0100
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<mailman.285.1187992595.32294.python-list@python.org>
	<87tzqotwkk.fsf@wilson.homeunix.com>
Message-ID: <faoso8$oa$1@gemini.csx.cam.ac.uk>

Torsten Bronger wrote:

> I don't know exactly what you mean but the answer is probably no.
> For example, I want the author to state the title, keywords, etc of
> his document, however, he should not state that he wants the title
> printed centred and 4cm from the top of the page.
> 
> The latter is defined in the "theme" which will be given as a set of
> ordinary LaTeX commands (for the LaTeX backend).

Isn't the problem that making such a theme will be very hard?

One of the annoying things about LaTeX is lack of control over positioning
(e.g. floats, page breaks...). The one thing most LaTeX users moan about is
trying to get their document to fit into an n page limit (e.g. for a
proposal). Maybe the theme could have some options to control spacing,
however, like some sort of CSS.

I think the one thing that would improve LaTeX is orthogonality in its
commands (e.g. why no 8pt option for the document, why the crazy \small,
\LARGE, etc commands?), and fixing the font system to be based around
modern fonts. Finally making bibtex part of the core and making it easy to
use would be great.

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From tundra at tundraware.com  Fri Aug 31 22:20:42 2007
From: tundra at tundraware.com (Tim Daneliuk)
Date: Fri, 31 Aug 2007 21:20:42 -0500
Subject: So what exactly is a complex number?
In-Reply-To: <46d89ba9$0$30380$9b4e6d93@newsspool4.arcor-online.net>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<46d89ba9$0$30380$9b4e6d93@newsspool4.arcor-online.net>
Message-ID: <ksumq4-qe61.ln1@ozzie.tundraware.com>

Wildemar Wildenburger wrote:
> Tim Daneliuk wrote:
>> A number by itself is called a "scalar".  For example, when I say,
>> "I have 23 apples", the "23" is a scalar that just represents an
>> amount in this case.
>>
>> One of the most common uses for Complex Numbers is in what are
>> called "vectors".  In a vector, you have both an amount and
>> a *direction*.  For example, I can say, "I threw 23 apples in the air
>> at a 45 degree angle".  Complex Numbers let us encode both
>> the magnitude (23) and the direction (45 degrees) as a "number".
>>
> 1. Thats the most creative use for complex numbers I've ever seen. Or 
> put differently: That's not what you would normally use complex numbers 
> for.


Oh, one other thing I neglected to mention.  My use of "vector" here
is certainly incorrect in the mathematician's sense.  But I first
ran into complex arithmetic when learning to fly an airplane.
The airplane in flight has a speed (magnitude) and a bearing (direction).
The winds aloft also have speed and bearing.  These are called
the aircraft "vector" and the wind "vector" respectively.  They must
be added to compute the actual (effective) speed/direction the aircraft
is flying.  In the Olden Days (tm), we did this graphically on a
plastic flight computer and a grease pencil.  With the advent of
calculators like the HP 45 that could do polar <-> rectangular
conversion, this sort of problem became a snap to do.  It is from
this experience that I used the (non-mathematical) sense of the
word "vector" ...

----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From evan at yelp.com  Tue Aug 21 20:09:15 2007
From: evan at yelp.com (Evan Klitzke)
Date: Tue, 21 Aug 2007 17:09:15 -0700
Subject: Extracting the traceback
In-Reply-To: <1187740411.848743.151960@x35g2000prf.googlegroups.com>
References: <1187740411.848743.151960@x35g2000prf.googlegroups.com>
Message-ID: <cfb58d850708211709n37cea96btfbd3051ef0632dd2@mail.gmail.com>

On 8/21/07, billiejoex <gnewsg at gmail.com> wrote:
> Hi there,
> I'm facing a case where I need to get the traceback outptut when
> occurring an exception.
> I solved such problem by using traceback module in conjunction with
> StringIO:
>
> import StringIO, traceback
> try:
>     raise Exception
> except:
>     f = StringIO.StringIO()
>     traceback.print_exc(file=f)
>     print f.getvalue()
>
> ... but this seems a little poor to me since I first put output into
> the StringIO.StringIO(), then I get it back by using getvalue() on
> it.
> Is there a way to avoid the use of StringIO and get such output
> without using such (useless) additional step?

If you just want to print the output (as in your example), you can use
file=sys.stdout or file=sys.stderr in the call to print_exc. If you
want to store the traceback into a string for some other purpose (e.g.
logging, email notifications) I believe that you must use a StringIO
object.

-- 
Evan Klitzke <evan at yelp.com>


From ptmcg at austin.rr.com  Tue Aug  7 11:33:55 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 07 Aug 2007 08:33:55 -0700
Subject: parsing a dbIII file
In-Reply-To: <mailman.1707.1186471320.22759.python-list@python.org>
References: <1186469710.277542.246430@w3g2000hsg.googlegroups.com>
	<mailman.1707.1186471320.22759.python-list@python.org>
Message-ID: <1186500835.221263.76210@d55g2000hsg.googlegroups.com>

On Aug 7, 2:21 am, Steve Holden <st... at holdenweb.com> wrote:
> korove... at gmail.com wrote:
> > Hello everybody, I'm new to python (...I work with cobol...)
>
> > I have to parse a file (that is a dbIII file) whose stucture look like
> > this:
> > |string|, |string|, |string that may contain commas inside|, 1, 2, 3, |
> > other string|
>
As Steve mentioned pyparsing, here is a pyparsing version for cracking
your data:

from pyparsing import *

data = "|string|, |string|, |string that may contain commas inside|,
1, 2, 3, |other string|"

integer = Word(nums)
# change unquoteResults to True to omit '|' chars from results
string = QuotedString("|", unquoteResults=False)
itemList = delimitedList( integer | string )

# parse the data and print out the results as a simple list
print itemList.parseString(data).asList()

# add a parse action to convert integer strings to actual integers
integer.setParseAction(lambda t:int(t[0]))

# reparse the data and now get converted integers in results
print itemList.parseString(data).asList()

Prints:

['|string|', '|string|', '|string that may contain commas inside|',
'1', '2', '3', '|other string|']
['|string|', '|string|', '|string that may contain commas inside|', 1,
2, 3, '|other string|']

-- Paul



From see at signature.invalid  Sun Aug  5 09:22:02 2007
From: see at signature.invalid (Douglas Wells)
Date: Sun, 5 Aug 2007 09:22:02 -0400 (EDT)
Subject: Comparing RFC1123 based Dates
References: <1186281836.970400.103490@i13g2000prf.googlegroups.com>
	<1186284911.988459.324690@e16g2000pri.googlegroups.com>
Message-ID: <f94itq$1r7p$1@flame.contek.com>

In article <1186284911.988459.324690 at e16g2000pri.googlegroups.com>,
  Phoe6 <orsenthil at gmail.com> writes:
> Phoe6 wrote:
> > I would like to parse RFC 1123 date format and compare two dates. I
> > find that
> > datetime module does not specifically confirms to any RFC. Any
> > suggestions as how I can handle the RFC 1123 date format using
> > standard libraries before I go to re based parsing?
> 
> Well,
> >>> import time
> >>> timeobj = time.strptime("Thu, 01 Dec 1994 16:00:00 GMT","%a, %d %b %Y %H:%M:%S %Z")
> 
> was easy.

Well, it might have been easy, but it's got several gotchas (in
both Python and C), including:

  - The zone field (%Z) only corresponds for the GMT and UT timezones,
    which are obsolete (see RFC 2822).  There is no support for
    the recommended +/-time-offset form.

  - The day-of-week (%a) and month (%b) fields in strptime and
    strftime are subject to the process's locale, whereas the RFC
    time forms are not.  Those are hardwired to names that happen
    to correspond to the C, POSIX, and probably most of the en_*
    locales, but not to others that would be used by billions of
    people.  Thus anyone using your program who doesn't happen to
    reside in one of the English-speaking countries (or does and
    is using a native locale) is likely to encounter problems when
    using your program.

  - The day-of-week field is optional.

  - Comments are allowed (but deprecated) in the whitespace fields
    of the time format.  (On the other hand, I've never seen this
    is normal e-mail.)

I find the use of strptime and strftime difficult enough to manage
with Internet date/times that I restrict my use of them to programs
that are limited to processing date/times.  Even then, I then
explicitly set the locale (LC_TIME) to the "C" locale.  Otherwise,
I use ad hoc code that explicitly recognizes the RFC-defined forms.

-- 
.   Douglas Wells             .  Connection Technologies      .
.   Internet:  -sp9804- -at - contek.com-                     .


From gherron at islandtraining.com  Thu Aug 23 13:37:29 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 23 Aug 2007 10:37:29 -0700
Subject: My 'time' module is broken, unsure of cause
In-Reply-To: <200708231122.55588.bulliver@badcomputer.org>
References: <200708231122.55588.bulliver@badcomputer.org>
Message-ID: <46CDC5D9.8050800@islandtraining.com>

darren kirby wrote:
> Hi all,
>
> I have a strange error here and I am unsure how to further investigate it:
>
> Python 2.4.4 (#1, Aug 23 2007, 10:51:29)
> [GCC 4.1.2 (Gentoo 4.1.2)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>   
>>>> import time
>>>>         
> 40:42:0
>   
>>>> now = time.time()
>>>>         
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: 'module' object has no attribute 'time'
>   
You probably has a file named time.py in your current directory, and it
is *that* file you are importing.
(Run Python with a "-v" option to see what file "import time" is
actually importing.)
> Notice the '40:42:0' that always gets output. I searched Gentoo's bugzilla but 
> can not see anything relevant. I rebuilt python but the behavior recurs. I am 
> unsure if the issue is with Python, Gentoo, or perhaps with the underlying 
> lib (presumably glibc) that Python uses for the time module. This is working 
> fine on another machine (also 2.4.4, GCC 3.4.6,  Gentoo Hardened).
>
> Anyone seen this? Any hints for me to track this issue down? Any further 
> information I could provide?
>
> Thanks for consideration,
> -d
>   



From http  Mon Aug 27 00:48:00 2007
From: http (Paul Rubin)
Date: 26 Aug 2007 21:48:00 -0700
Subject: ANN: SCF released GPL
References: <2qnAi.21495$eY.19028@newssvr13.news.prodigy.net>
Message-ID: <7x3ay5d1mn.fsf@ruckus.brouhaha.com>

hg <hg at nospam.org> writes:
> I am looking for a free subversion server resource to put the code
> ... if you know of any.

Does it have to be SVN?  I think Savannah and Sourceforge both still
use CVS.  I'm not sure what Launchpad uses.  I guess if necessary I
could set up a subversion repo for you on a server that I use.  I've
been wanting to put together some GNU security tools under the name
Fort GNOX, so maybe this can be a start.


From half.italian at gmail.com  Thu Aug  9 14:25:09 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: Thu, 09 Aug 2007 18:25:09 -0000
Subject: Threaded Design Question
Message-ID: <1186683909.797328.68770@i13g2000prf.googlegroups.com>

Hi all!  I'm implementing one of my first multithreaded apps, and have
gotten to a point where I think I'm going off track from a standard
idiom.  Wondering if anyone can point me in the right direction.

The script will run as a daemon and watch a given directory for new
files.  Once it determines that a file has finished moving into the
watch folder, it will kick off a process on one of the files.  Several
of these could be running at any given time up to a max number of
threads.

Here's how I have it designed so far.  The main thread starts a
Watch(threading.Thread) class that loops and searches a directory for
files.  It has been passed a Queue.Queue() object (watch_queue), and
as it finds new files in the watch folder, it adds the file name to
the queue.

The main thread then grabs an item off the watch_queue, and kicks off
processing on that file using another class Worker(threading.thread).

My problem is with communicating between the threads as to which files
are currently processing, or are already present in the watch_queue so
that the Watch thread does not continuously add unneeded files to the
watch_queue to be processed.  For example...Watch() finds a file to be
processed and adds it to the queue.  The main thread sees the file on
the queue and pops it off and begins processing.  Now the file has
been removed from the watch_queue, and Watch() thread has no way of
knowing that the other Worker() thread is processing it, and shouldn't
pick it up again.  So it will see the file as new and add it to the
queue again.  PS.. The file is deleted from the watch folder after it
has finished processing, so that's how i'll know which files to
process in the long term.

I made definite progress by creating two queues...watch_queue and
processing_queue, and then used lists within the classes to store the
state of which files are processing/watched.

I think I could pull it off, but it has got very confusing quickly,
trying to keep each thread's list and the queue always in sync with
one another.  The easiset solution I can see is if my threads could
read an item from the queue without removing it from the queue and
only remove it when I tell it to.  Then the Watch() thread could then
just follow what items are on the watch_queue to know what files to
add, and then the Worker() thread could intentionally remove the item
from the watch_queue once it has finished processing it.

Now that I'm writing this out, I see a solution by over-riding or
wrapping Queue.Queue().get() to give me the behavior I mention above.

I've noticed .join() and .task_done(), but I'm not sure of how to use
them properly.  Any suggestions would be greatly appreciated.

~Sean



From erlangga.kusuma at gmail.com  Mon Aug  6 11:21:54 2007
From: erlangga.kusuma at gmail.com (angga_cute)
Date: Mon, 06 Aug 2007 08:21:54 -0700
Subject: computer, printer, and another
Message-ID: <1186413714.616729.198620@x35g2000prf.googlegroups.com>

Hi guys....
I have some information for you...
I would like you to invite to visiting my web, may be you need some
information about newest information about computer, laptop, and than
printer. I have little bit information on my web http://www.komputer-djogja.blogspot.com/
I hope my web can give you alot of information...
Thanks for you attention...



From kyosohma at gmail.com  Wed Aug 29 10:03:19 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 29 Aug 2007 07:03:19 -0700
Subject: What's the difference ?
In-Reply-To: <1188394767.333396.129020@r29g2000hsg.googlegroups.com>
References: <1188394767.333396.129020@r29g2000hsg.googlegroups.com>
Message-ID: <1188396199.136398.321900@r34g2000hsd.googlegroups.com>

On Aug 29, 8:39 am, Alex <alexandre.ba... at gmail.com> wrote:
> Hye,
>
> I was just wondering what is the difference between
>
> >> if my_key in mydict:
> >>     ...
>
> and
>
> >> if mydict.has_keys(my_key):
> >>     ...
>
> I've search a bit in the python documentation, and the only things I
> found was that they are "equivalent".
>
> But in this (quiet old) sample ( "http://aspn.activestate.com/ASPN/
> Cookbook/Python/Recipe/59875" ), there is difference between the two
> notation.
>
> Thanks in advance

Weird. Hetland's book, "Beginning Python" states that it's a matter of
taste. Martelli's "Python Cookbook 2nd Ed." says to use the get()
method instead as you never know if a key is in the dict.  However, I
can't seem to find any reference to has_key in his book.

According to Chun in "Core Python Programming", has_key will be
obsoleted in future versions of Python, so he recommends using "in" or
"not in".

There's your non-answer. Hope that helps.

Mike



From anno4000 at radom.zrz.tu-berlin.de  Sat Aug 25 10:29:25 2007
From: anno4000 at radom.zrz.tu-berlin.de (anno4000 at radom.zrz.tu-berlin.de)
Date: 25 Aug 2007 14:29:25 GMT
Subject: Regular expression use
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
	<famlj0$33k$1@mlucom4.urz.uni-halle.de>
	<famms0$em2$1@gemini.csx.cam.ac.uk> <oWTzi.1954$bO6.752@edtnps89>
Message-ID: <5jasm5F3tgqdqU1@mid.dfncis.de>

John W. Krahn <krahnj at telus.net> wrote in comp.lang.perl.misc:
> Nick Maclaren wrote:
> > In article <famlj0$33k$1 at mlucom4.urz.uni-halle.de>,
> > Mirco Wahab <wahab-mail at gmx.net> writes:
> > |> 
> > |> Using complex regular expressions is like tank destruction
> > |> with contact charges glued on them.  Only a few people
> > |> will even survive the first "usage", but survivors will
> > |> then eventually be able to destroy almost every tank with
> > |> tremendous speed and precision.
> > 
> > I must remember that!  It is nicely put.
> 
> I couldn't understand it.  (An old Centurion trooper.)

Me neither.  The word "nicely" isn't the first thing it brings to
mind.

Anno


From zyzhu2000 at gmail.com  Thu Aug 16 23:15:10 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Fri, 17 Aug 2007 03:15:10 -0000
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <mailman.2091.1187317979.22759.python-list@python.org>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<fa2m4s$k1g$1@daisy.noc.ucla.edu>
	<1187311999.880853.135780@j4g2000prf.googlegroups.com>
	<mailman.2091.1187317979.22759.python-list@python.org>
Message-ID: <1187320510.165621.224150@l22g2000prc.googlegroups.com>

On Aug 16, 9:32 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> On Fri, 2007-08-17 at 00:53 +0000, beginner wrote:
> > $b is supposed to be a hash-table of hash-table. If a key exists in
> > $b, it points to another hash table. The $a=$b->{"A"} ||={} pattern is
> > useful when you want to add records to the double hash table.
>
> > For example, if you have a series of records in the format of (K1, K2,
> > V), and you want to add them to the double hash-table, you can do
> > $a=$b->{K1} || ={}
> > $a->{K2}=V
>
> What is the best solution in Perl need not be the best solution in
> Python. In Python you should just use a tuple as your dict key, i.e.
> a[k1,k2] = v, unless you have some other constraints you're not telling
> us.
>
> HTH,
>
> --
> Carsten Haesehttp://informixdb.sourceforge.net

I use tuples this way all the time. It is indeed very neat.  But it is
not a replacement for double hash-table.  If I want to retrieve
information just by K1, it is not efficient to index on (K1, K2).



From yichangjiang at gmail.com  Mon Aug 13 02:48:42 2007
From: yichangjiang at gmail.com (ychjiang)
Date: Sun, 12 Aug 2007 23:48:42 -0700
Subject: which IDE is highly recommended in Windows OS
In-Reply-To: <1186970945.403792.51790@d55g2000hsg.googlegroups.com>
References: <1186970945.403792.51790@d55g2000hsg.googlegroups.com>
Message-ID: <1186987722.945794.142810@q3g2000prf.googlegroups.com>

On 8 13 ,   10 09 , Ge Chunyuan <hhy... at gmail.com> wrote:
> hi Group:
>
> I am a new comer for Python, I wonder which IDE is recommended in
> Windows OS.
> Can anyone give some suggestion.
>
> Thanks indeed
> Ge Chunyuan

    java        eclipse      pydev eclipse       



From nospam at invalid.com  Sun Aug 26 19:26:29 2007
From: nospam at invalid.com (Jack)
Date: Sun, 26 Aug 2007 16:26:29 -0700
Subject: Parser Generator?
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
	<1187834836.115735.111160@e9g2000prf.googlegroups.com>
	<qKudneA2bKtKoFLbnZ2dnUVZ_vKunZ2d@comcast.com>
	<1188159150.755231.239390@o80g2000hse.googlegroups.com>
Message-ID: <cLqdnf6Kn_25kU_bnZ2dnUVZ_hGdnZ2d@comcast.com>

Thanks Json. There seem to be a few options that I can pursue. Having a hard 
time
chooing one now :)

"Jason Evans" <joevans at gmail.com> wrote in message 
news:1188159150.755231.239390 at o80g2000hse.googlegroups.com...
> On Aug 24, 1:21 pm, "Jack" <nos... at invalid.com> wrote:
>> "Jason Evans" <joev... at gmail.com> wrote in message
>> >    http://www.canonware.com/Parsing/
>>
>> Thanks Jason. Does Parsing.py support Unicode characters (especially 
>> CJK)?
>> I'll take a look.
>
> Parsers typically deal with tokens rather than individual characters,
> so the scanner that creates the tokens is the main thing that Unicode
> matters to.  I have written Unicode-aware scanners for use with
> Parsing-based parsers, with no problems.  This is pretty easy to do,
> since Python has built-in support for Unicode strings.
>
> Jason
> 




From aboudouvas at panafonet.gr  Mon Aug 13 05:48:59 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Mon, 13 Aug 2007 02:48:59 -0700
Subject: Eclipse/PyDev question
Message-ID: <1186998539.030727.279330@g4g2000hsf.googlegroups.com>

Hi,

i am using Eclipse (Platform Runtime binary) with PyDev and i was
wondering if someone can help me with this:

1. I set breakpoints to a .py file and i have told Eclipse to open the
Debug perspective when it sees that some .py file(s) of my project
indeed contains breakpoints. So, i press F9,  Eclipse starts, Debug
perspective opens and i can use the debugger just fine. But when the
app terminates, how can i tell Eclipse to switch automatically to the
PyDev perspective and not remain in the Debug one ?

2. Let's say we have a project that consists of some .py files. I want
to press F9 when the editor displays anyone of these files but make
Eclipse to run the whole project (that has another .py as "default")
and not the script that i am currently working on, is that possible ??


Thanks a lot for any help



From ptmcg at austin.rr.com  Thu Aug 16 22:09:39 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Thu, 16 Aug 2007 19:09:39 -0700
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187305420.464078.156440@x35g2000prf.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<1187305420.464078.156440@x35g2000prf.googlegroups.com>
Message-ID: <1187316579.536255.175540@w3g2000hsg.googlegroups.com>

On Aug 16, 6:03 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> On Aug 16, 6:35 pm, beginner <zyzhu2... at gmail.com> wrote:
>
> > Hi All.
>
> > I'd like to do the following in more succint code:
>
> > if k in b:
> >     a=b[k]
> > else:
> >     a={}
> >     b[k]=a
>
> > a['A']=1
>
> > In perl it is just one line: $a=$b->{"A"} ||={}.
>
> > Thanks,
> > Geoffrey
>
> Define b as a default dict:
>
> b = defaultdict(dict)
> b[k]['A'] = l
>
> Carl Banks- Hide quoted text -
>
> - Show quoted text -

I think the most direct translation of the OP's example to Python
would be:

# setup b as special flavor of dict, that creates a
# new dict for not-yet-created keys
b = defaultdict(dict)

# actual python impl of $a=$b->{k}||={}
a = b[k]

# assign 1 to retrieved/created dict
a['A'] = 1

-- Paul



From bbxx789_05ss at yahoo.com  Mon Aug  6 14:31:15 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 06 Aug 2007 11:31:15 -0700
Subject: udp, datagram sockets
In-Reply-To: <mailman.1681.1186419584.22759.python-list@python.org>
References: <1186416225.769753.307110@o61g2000hsh.googlegroups.com>
	<mailman.1681.1186419584.22759.python-list@python.org>
Message-ID: <1186425075.604433.122380@g4g2000hsf.googlegroups.com>

On Aug 6, 10:59 am, Thomas Jollans <tho... at jollans.com> wrote:
>
> You don't make any attempt to break out of the outer loop. (break breaks the
> innermost loop)
>

By design.  My server stands ready to process any and all messages
forever.  The problem I'm having is that my server processes the same
message forever.



From horpner at yahoo.com  Mon Aug  6 06:49:36 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 06 Aug 2007 10:49:36 GMT
Subject: Misleading wikipedia article on Python 3?
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
	<eICti.37400$G23.15165@newsreading01.news.tds.net>
Message-ID: <41Dti.37401$G23.10727@newsreading01.news.tds.net>

On 2007-08-06, Neil Cerutti <horpner at yahoo.com> wrote:
> On 2007-08-06, Paul Rubin <http> wrote:
>> Carsten Haese <carsten at uniqsys.com> writes:
>>> For instance, if you never use print statements in your code,
>>> you won't notice that print is becoming a function. If you
>>> do, you'll have to make appropriate accommodations.
>>
>> Why on earth did they make this change?  It just seems
>> gratuitous.  Is the assert statement also being changed?  Are
>> they going to update all the docs that say that the yield
>> statement works like the print statement?
>
> From the footnotes of PEP 3100:
>
> http://mail.python.org/pipermail/python-dev/2005-September/056154.html
> http://www.python.org/dev/peps/pep-3105

Incidentally, from the second link I find it shocking that the
keyword parameter "file" shadows a builtin. It seems to endorse a
bad practice.

-- 
Neil Cerutti


From steve at holdenweb.com  Sun Aug 12 22:06:00 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Aug 2007 22:06:00 -0400
Subject: Ligmail bug?
In-Reply-To: <E9171170-9581-42C5-B68F-6F1442433246@leafe.com>
References: <20070812005057.GA15805@ob41.org>
	<f9l3m2$hb0$1@sea.gmane.org>	<20070812182439.GA2427@ob41.org>
	<46BEE9B8.8080904@holdenweb.com>
	<E9171170-9581-42C5-B68F-6F1442433246@leafe.com>
Message-ID: <46BFBC88.2010400@holdenweb.com>

Ed Leafe wrote:
> On Aug 12, 2007, at 7:06 AM, Steve Holden wrote:
> 
>> [Please reply via the list when a response is made via the list.  
>> You may
>> now have detached the follow-ups from your original question, but at
>> least if you use the list there's a chance someone else will help  
>> you if
>> I give up or don't have time. Note I have sent this response to the
>> list; you are Cc'd to make sure you pick it up even though it may not
>> appear in the same thread.]
> 
> 	I've seen others comment on this, so I'll throw in my 2 cents.
> 
> 	The default behavior for this list should be to reply to the list,  
> as you have pointed out. Yet for some unfathomable reason, the  
> keepers of the list have set it up to default to reply to the  
> original sender. This is nothing short of stupid, and I cast my vote  
> (if I even have one) for changing this default to a more intelligent  
> one, if for no other reason than to not have to constantly read  
> comments like this chiding someone for acting in a predictable fashion.
> 
Since I subscribe to the newsgroup rather than to the mailing list I 
don't see that behavior. It's by far the most convenient way to interact 
with c.l.py, and gmane.org makes it easy to do so with Firefox or 
Outlook Express. I've never really understood why Outlook doesn't 
include an NNTP client. I presume Apple Mail (which appears in your 
headers) doesn't act as a newsreader either?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From arkanes at gmail.com  Wed Aug 29 14:28:54 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 29 Aug 2007 13:28:54 -0500
Subject: Accessing docstrings at runtime?
In-Reply-To: <011b01c7ea69$95512fe0$e6003dcc@worf2>
References: <011b01c7ea69$95512fe0$e6003dcc@worf2>
Message-ID: <4866bea60708291128o29803077r5fe06249ab6cc29c@mail.gmail.com>

On 8/29/07, Kenneth Love <klove at tax.ok.gov> wrote:
> How do I print the docstring for a class property?
>
> When I run the code below, I get the docstring for the string module
> and not the one I set for the property.
>
> ---------------------------------------------
> # NOTE: Found in Python docs defining built-in functions (such as
> #       property()).  FIXED: Bug in getx, setx, and delx where "__x"
> #       was misreferenced as "_x".
> class C(object):
>     def __init__(self):
>         self.__x = None
>     def getx(self):
>         return self.__x
>     def setx(self, value):
>         self.__x = value
>     def delx(self):
>         del self.__x
>     x = property(getx, setx, delx, "I'm the 'x' property.")
>
> if __name__ == "__main__"
>     y = C()
>     y.x = 'test'
>     print y.x
>     print y.x.__doc__
> ---------------------------------------------
>
> I get the following output:
>
> ---------------------------------------------
> test
> str(object) -> string
>
> Return a nice string representation of the object.
> If the argument is a string, the return value is the same object.
> ---------------------------------------------
>
> What am I doing wrong?
>

You're looking at an instance, not at the class. y.x is going through
the descriptor lookup and is returning the string, so the __doc__ is
the the __doc__ of the string object, as you see.

If you want to look at the property directly, look it up in the class object:

C.x.__doc__


From theshadowx at gmail.com  Thu Aug 23 14:34:01 2007
From: theshadowx at gmail.com (TheShadow)
Date: Thu, 23 Aug 2007 18:34:01 -0000
Subject: Question about embedding python in C++
In-Reply-To: <vUjzi.51$L_7.47@newsfe16.phx>
References: <1187891085.147246.19380@i38g2000prf.googlegroups.com>
	<vUjzi.51$L_7.47@newsfe16.phx>
Message-ID: <1187894041.718724.313060@m37g2000prh.googlegroups.com>

On Aug 23, 11:57 am, Farshid Lashkari <n... at spam.com> wrote:
> TheShadow wrote:
> > When extending python in c/c++ after you register a module is there a
> > way in c/c++ to check if they were correctly registered?
>
> > Cause I'm having the problem where when I execute the the python
> > script it finds the module but none of the functions.
>
> Are you calling Py_InitModule(...) in your initmodule function? If so,
> Py_InitModule(...) returns a reference to the module object. You can use
> this object to double check that your function names exist in the
> modules dictionary. Most likely, there is an error in your code. If you
> post it, it would be easier to tell what the problem is.
>
> -Farshid

Hrmm I forgot about the module init function... I was just calling
Py_initModule()



From steve at holdenweb.com  Fri Aug  3 09:20:09 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 03 Aug 2007 09:20:09 -0400
Subject: File Handling & TRY/EXCEPT
In-Reply-To: <33119.3366124809$1186129744@news.gmane.org>
References: <33119.3366124809$1186129744@news.gmane.org>
Message-ID: <f8va2a$8od$1@sea.gmane.org>

Robert Rawlins - Think Blue wrote:
> Hello Guys,
> 
>  
> 
> I?m looking for some advice on how best to handle file read/write errors 
> with try/except as i?m a little vague on this, I have a small memory 
> leak in my app and I?m starting to think its generated by my log file 
> write. For an example of the function look below.
> 
>  
> 
>        def addAppLog(self, event):
>               try:
>                      logfile = open('/pblue/new/Logs/Application.csv','a')
>                      now = datetime.datetime.now()
>                      logstring = '%s,%s \n' % (event, str(now))
>                      logfile.write(logstring)
>               except:
>                      self.addAppLog(event)
> 
It seems somewhat perverse, when the logging code raises an exception, 
to recursively log - presumably the same exception will be raised again?

>               else:
> 
>                      logfile.close()
> 
Remember that in 2.5 you can use try ... except ... finally

> 
> Now I?m looking for some help to sort this out as I?m sure it?s pretty 
> untidy, I want to make it as air tight as possible. The basic concept 
> was that if it tries writing to the log file and it fails, then it needs 
> to reattempt it, right?
> 
Wrong. The one thing you can't log is a logging attempt error!
>  
> 
> What?s the best way to handle this to ensure that there are not any 
> memory leaks caused when the file is open() but not followed by a 
> close(). I?m running 2.4 and I know some of these newer versions don?t 
> need you to explicitly close() the file objects, but I would certainly 
> feel a lot better.
> 
>  
> 
> Any advice?
> 
This is just a quick on-the-fly look at what you did, I am sure you will 
receive other,  probably more helpful, comments.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From kyosohma at gmail.com  Fri Aug  3 11:46:45 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 03 Aug 2007 08:46:45 -0700
Subject: How to log python Shell results
In-Reply-To: <1186154042.876531.47100@k79g2000hse.googlegroups.com>
References: <1186154042.876531.47100@k79g2000hse.googlegroups.com>
Message-ID: <1186156005.938842.157480@m37g2000prh.googlegroups.com>

On Aug 3, 10:14 am, Colly <colin.mcfarl... at cgi.com> wrote:
> How do I output the IDLE 1.2.1 Python Shell results to a log file.

Redirect stdout to the log file.


<code>

out = sys.stdout  # save stdout for restoration later
f = open(r'c:\test\test.log', 'w')
sys.stdout = f  # now stdout is redirected
# do some stuff that prints output
f.close() # when done, close the file
sys.stdout = out  # restore stdout

</code>

Or you could just copy and paste it yourself.

Mike



From richardjones at optushome.com.au  Mon Aug 13 06:18:05 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Mon, 13 Aug 2007 20:18:05 +1000
Subject: Adventure-Engines in Python
References: <mailman.1905.1186997614.22759.python-list@python.org>
Message-ID: <46c02fdd$0$14405$afc38c87@news.optusnet.com.au>

Wildemar Wildenburger wrote:
> Are there any?

An adventure game was written for one of the PyWeek challenges:

http://www.pyweek.org/e/aerunthar/

You might be able to use that as a starting point.



    Richard



From paul at boddie.org.uk  Wed Aug  1 18:51:27 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 01 Aug 2007 15:51:27 -0700
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <mailman.1460.1186007000.22759.python-list@python.org>
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
	<f8quug$m7j$1@sea.gmane.org>
	<496954360708011453h2a68dee4x48dcb15bb25ea717@mail.gmail.com>
	<f8r0du$qhn$1@sea.gmane.org>
	<mailman.1460.1186007000.22759.python-list@python.org>
Message-ID: <1186008687.142015.55060@q75g2000hsh.googlegroups.com>

Steve Holden wrote:
>
> I can't think of any other products I use where you can contact the
> support team from right inside the software. And get answers without
> paying per-incident support fees!

Proprietary products, right? A lot of KDE applications have a "Report
Bug..." item in the "Help" menu, for example. Perhaps you're thinking
of the same kind of thing.

Paul



From gslindstrom at gmail.com  Fri Aug 31 12:06:39 2007
From: gslindstrom at gmail.com (Greg Lindstrom)
Date: Fri, 31 Aug 2007 11:06:39 -0500
Subject: Complex Numbers
Message-ID: <a9f39a410708310906x46202a4bt4199ab8c42f26819@mail.gmail.com>

> ---------- Forwarded message ----------
> From: "Lamonte Harris" <pyth0nc0d3r at gmail.com>
> To: python-list at python.org
> Date: Thu, 30 Aug 2007 20:11:14 -0500
> Subject: So what exactly is a complex number?
> Like in math where you put letters that represent numbers for place
> holders to try to find the answer type complex numbers?


Not quite.  Consider the square root of -1.  It's not real because you can't
square a real number and get a negative, so we define "i" (or, perhaps "j")
to be the square root of -1.  An imaginary number is of the form Ai, where A
is "real".  So 2i, -3.14i are imaginary.

Complex Numbers are of the form A + Bi  Where A and B are real (so they have
a "real" component and am "imaginary" component). So yo might see 2 + 3i,
etc.  You'll see them a lot in engineering.
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From tenax.raccoon at gmail.com  Mon Aug 20 15:42:44 2007
From: tenax.raccoon at gmail.com (Jason)
Date: Mon, 20 Aug 2007 19:42:44 -0000
Subject: I Need help from all the group participants
In-Reply-To: <facp6k$e0k$1@localhost.localdomain>
References: <fac7nj$ci9$1@localhost.localdomain>
	<mailman.0.1187630213.32294.python-list@python.org>
	<fack3a$7kk$1@ss408.t-com.hr>
	<1187636668.436474.289220@o80g2000hse.googlegroups.com>
	<facp6k$e0k$1@localhost.localdomain>
Message-ID: <1187638964.815505.85390@57g2000hsv.googlegroups.com>

On Aug 20, 1:14 pm, Boris Ozegovic <ninja.krmen... at nes.com> wrote:
> dogatemycompu... at gmail.com wrote:
> > I would be happy to help but I don't have a clear understand of what
> > the poster needs.
>
> Suppose you want to find out what is someone's pulse/heart rate, you can
> ask question in many ways, syntaxically, but with same semantic.  One way
> to find out someone's pulse is to ask: "What is John's pulse", other is
> "Please, tell me, what is Jonh's pulse", or "Send me John's pulse
> immediatelly!", etc.  So, if you can write some other question to find out
> someone's pulse, please do, but, it would be great if your question would
> have different pattern, e.g. "Please, tell me John's pulse immediatelly"
> and "Tell me John's pulse right now" have the same pattern, because they
> are syntaxically very alike.
>
> --
> Ne dajte da nas la?ljivac Bandi? truje:http://cnn.blog.hr/arhiva-2007-06.html#1622776372

I wonder what John's pulse is?  Display John's pulse.  I need to know
John's pulse.  How many beats per minute is John's heart going?
What's John's pulse rate?  How fast is John's heart rate?  How fast is
John's blood pumping?  What is the rate of John's heart?  What is the
rate of John's pulse?  How fast is John's heart beating?  What is the
frequency of John's heart pulses?  What is the frequency of John's
cardiac cycle?  How fast is John's cardiac cycle?  What is the rate of
John's pulse?  I want the result of John's auscultation.  Give me
John's heart beats, or give John death!

Okay, probably not the last one.

If you're trying to do some natural language processing, you should
take a look at the Natural Language Tool Kit (NLTK) [1].  The NLTK is
written in Python, and also has a book to help you out (available free
online or as a physical book for price).

In any case, English is a terribly difficult language to parse, and
can have many ambiguities that can only be resolved through knowledge
of the subjects and verbs involved.  Good luck on your project.  Just
remember: Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo
buffalo [2].

[1] The NLTK website is at "http://nltk.sourceforge.net/index.php/
Main_Page"
[2] That's actually valid English.  See "http://en.wikipedia.org/wiki/
Buffalo_buffalo_Buffalo_buffalo_buffalo_buffalo_Buffalo_buffalo"

  --Jason



From raims at dot.com  Sat Aug 18 21:27:42 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Sun, 19 Aug 2007 03:27:42 +0200
Subject: How to call module functions inside class instance functions?
References: <1187484041.838615.259980@e9g2000prf.googlegroups.com>
Message-ID: <1i32p8v.nezbxp1h95n1uN%raims@dot.com>

beginner <zyzhu2000 at gmail.com> wrote:
> I have encountered a small problems.  How to call module functions
> inside class instance functions? For example,  calling func1 in func2
> resulted in a compiling error.
> 
> "my module here"
> 
> def func1():
>      print "hello"
> 
> class MyClass:
>    def func2():
>          #how can I call func1 here.
>          func1() #results in an error

rhymes at groove ~ % cat t.py
def func1():
    print "hello"
    
class MyClass:
    def func2():
        func1()
rhymes at groove ~ % python -c "import t"
rhymes at groove ~ %

As you can see there no compiling error, because the syntax is correct,
you'll eventually get a runtime error like this:

>>> import t
>>> c = t.MyClass()
>>> c.func2()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: func2() takes no arguments (1 given)

That's because you left out the "self" argument in the definition of
"func2()". This version is correct:

--
def func1():
    print "hello"
    
class MyClass(object):
    def func2(self):
        func1()

c = MyClass()
c.func2()
--

rhymes at groove ~ % python tcorrect.py
hello


HTH

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From mailpitches at email.com  Fri Aug 31 22:42:55 2007
From: mailpitches at email.com (mp)
Date: Fri, 31 Aug 2007 19:42:55 -0700
Subject: Non-Blocking IO
Message-ID: <1188614575.647228.248640@k79g2000hse.googlegroups.com>

I'm trying to use popen2 to call a program and then write and read
data from the program using a Python script. Unfortunately, my calls
to read block (I need non-blocking IO), and all the workarounds I've
seen online don't work. Here is my most promising solution and how it
breaks:

Source of solution: http://mail.python.org/pipermail/python-dev/2005-March/052263.html


def
setblocking(fd,flag):
    " set/clear blocking
mode"
    # get the file's current flag
settings
    fl = fcntl.fcntl(fd,
fcntl.F_GETFL)
    if
flag:
        # clear non-blocking mode from
flags
        fl = fl &
~os.O_NONBLOCK
 
else:
        # set non-blocking mode from
flags
        fl = fl |
os.O_NONBLOCK
    # update the file's
flags
    fcntl.fcntl(fd, fcntl.F_SETFL,
fl)


def
try3():
    fin,fout=
os.popen2("echo.py")
 
setblocking(fout.fileno(),False)
 
os.write(fin.fileno(),'blah')
 
fin.flush()
    print os.read(fout.fileno(),256)

Calling try3() yields the error:
  File "./test.py", line 54, in try3
    print os.read(fout.fileno(),256)
OSError: [Errno 35] Resource temporarily unavailable



If anyone could help me accomplish this I'd be extremely grateful.
Thanks!
MP



From aboudouvas at panafonet.gr  Fri Aug  3 10:58:39 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Fri, 03 Aug 2007 07:58:39 -0700
Subject: Eclipse/PyDev question.
Message-ID: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>

Hi,
this is actually a question to those of us who use Eclipse and Pydev
as their main Python developing environment. As i use Eclipse (3.3
Europa) only for Python and i have nothing to do with Java, is there a
way to disable/uninstall some Java-specific stuff and make the
environment actually more snappy ??

thanks for any help



From rcdailey at gmail.com  Mon Aug 20 16:53:12 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 20 Aug 2007 15:53:12 -0500
Subject: optparse - required options
In-Reply-To: <46C9F7D1.9040506@jayloden.com>
References: <496954360708201251r137dfaedqe632361891eae343@mail.gmail.com>
	<46C9F7D1.9040506@jayloden.com>
Message-ID: <496954360708201353v19ea266cr50f144d1d71d5912@mail.gmail.com>

Well, I don't know what is wrong with people then. I don't see how required
arguments are of bad design. Some command-line applications are built around
performing tasks based on information received. Compilers, for example. A
compiler can't do much of anything unless you give it at the very least a
filename. So, a --file command would most definitely be one required
argument. Anyway, I'm not trying to start a debate on this issue. I have my
own implementation for required arguments at the moment, I am just a little
bit surprised that this module doesn't make it convenient. It would
definitely help on code duplication.

Thanks for your response.

On 8/20/07, Jay Loden <python at jayloden.com> wrote:
>
> Robert Dailey wrote:
> > Hi,
> >
> > I've been reading through the python documentation on the optparse
> > module and I was unable to find out how to specify if an option is
> > optional or required. The documentation vaguely states that actions can
> > be used to do this, however I was not able to figure out how. If anyone
> > could help I'd greatly appreciate it.
> >
>
> According to the optparse docs:
>
> required option
>     an option that must be supplied on the command-line; note that the
>     phrase ``required option'' is self-contradictory in English. optparse
>     doesn't prevent you from implementing required options, but doesn't
>     give you much help at it either. See examples/required_1.py and
>     examples/required_2.py in the optparse source distribution for two
>     ways to implement required options with optparse.
>
>
> And from what I can see, this seems to be somewhat intentional, see
> http://wiki.python.org/moin/OptParse the note at the bottom with a link to
> a mailing list thread. As far as I can tell, evidently some people feel that
> required options are indicative of a bad design and therefore optparse was
> designed not to make this easy on the programmer.
>
> -Jay
>
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From winter at biotec.tu-dresden.de  Tue Aug 21 15:00:05 2007
From: winter at biotec.tu-dresden.de (Christof Winter)
Date: Tue, 21 Aug 2007 21:00:05 +0200
Subject: How to optimise this code?
In-Reply-To: <mailman.68.1187711977.32294.python-list@python.org>
References: <mailman.68.1187711977.32294.python-list@python.org>
Message-ID: <46CB3635.7050705@biotec.tu-dresden.de>

David N Montgomery wrote:
> class testCase:
>     def __init__(self, tc):
>         if tc == 1:self.testCase1()
>         if tc == 2:self.testCase2()
>         if tc == 3:self.testCase3()
>         if tc == 4:self.testCase4()
>         if tc == 5:self.testCase5()
>         if tc == 6:self.testCase6()
> 
>     def testCase1(self):
>         print "tc1"
> 
>     def testCase2(self):
>         print "tc2"
> 
>     def testCase3(self):
>         print "tc3"
> 
>     def testCase4(self):
>         print "tc4"
> 
>     def testCase5(self):
>         print "tc5"
> 
>     def testCase6(self):
>         print "tc6"
> 
> 
>     def testCaseX(self):
>         print "tcX"
> 
> totalNumberOfTestCases = 6
> x = 0
> while x <= totalNumberOfTestCases:
>     x += 1
>     testCase(x)
> 
> 
> This template code is working, but I envisage having 100+ test cases and
> am concerned about my useage of if statements. I would be grateful for
> any pointers as to how I can run all tests cases, regardless of how
> many, in a more efficient manner.
> 
> Thank you in advance.

To get rid of the if statements, replace __init__ function with:

     def __init__(self, tc):
         functionToCall = eval("self.testCase%s" % tc)
         functionToCall()

HTH,

Chris



From kyosohma at gmail.com  Wed Aug 29 09:23:00 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 29 Aug 2007 06:23:00 -0700
Subject: self extracting zipefile (windows) and (standard module) zipefile
In-Reply-To: <1188388421.010643.19050@50g2000hsm.googlegroups.com>
References: <1188388421.010643.19050@50g2000hsm.googlegroups.com>
Message-ID: <1188393780.454058.196360@22g2000hsm.googlegroups.com>

On Aug 29, 6:53 am, Werner <Werner.Me... at fujitsu-siemens.com> wrote:
> Hi,
>
> I try to read (and extract) some "self extracting" zipefiles on a
> Windows system. The standard module zipefile seems not to be able to
> handle this.
>
> >>> fName = r"C:\tmp\mySelfExtratingFile.exe"
> >>> import zipfile
> >>> zipefile.is_zipfile(fName))
>
> False
>
> Is there a wrapper or has some one experience with other libaries to
> extract those files?
>
> Thanks in advance
> Werner

Since it's an executable, why not just use the subprocess module?

I did find this set of scripts, but I don't know if they will help:
http://www.example-code.com/python/zip.asp

I did find how to extract via the command line, which you could use in
conjunction with the subprocess module:
http://help.globalscape.com/help/cutezip2/Creating_and_extracting_archives.htm

Mike



From NO_Kroeger at gmx.de  Tue Aug 21 13:58:16 2007
From: NO_Kroeger at gmx.de (=?ISO-8859-1?Q?Nils_Oliver_Kr=F6ger?=)
Date: Tue, 21 Aug 2007 19:58:16 +0200
Subject: Python is removing my quotes!
In-Reply-To: <496954360708210927w10655bbdtc977aace232bf05d@mail.gmail.com>
References: <496954360708210900p6da42670o3a28d6b0dbd4c524@mail.gmail.com>	<46CB0E29.2010306@islandtraining.com>
	<496954360708210927w10655bbdtc977aace232bf05d@mail.gmail.com>
Message-ID: <46CB27B8.4000205@gmx.de>

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Hash: SHA1

Robert Dailey schrieb:
> Thank you for your response. The back slashes work! It's a bit annoying; but
> I have Microsoft to thank for that.

It's not Microsoft, you would experience the same problems under any
Unix I know of. At least the bash treats quotes as special characters,
so does afaik the sh and a couple of other shells in the Unixverse. You
will also need to escape blanks and depending on the shell a number of
other special characters (like for example the pipe).

Greetings

Nils
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=oDke
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From rrs at researchut.com  Mon Aug 13 14:02:11 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Mon, 13 Aug 2007 23:32:11 +0530
Subject: Module imports during object instantiation
References: <4c3vo4-u7k.ln1@learner.hq.netapp.com> <f9pcuj$6n4$1@sea.gmane.org>
Message-ID: <3ui6p4-lt3.ln1@learner.hq.netapp.com>

Steve Holden wrote:

> Ritesh Raj Sarraf wrote:
>> class Log:
>> 
>>     def __init__(self, verbose, lock = None):
>> 
>>         if verbose is True:
>>             self.VERBOSE = True
>>         else: self.VERBOSE = False
>> 
> Better:
> 
> self.VERBOSE = verbose
> 
> or, if you suspect verbose might pass in a mutable value,
> 
>          self.VERBOSE  bool(verbose)
> 

Thanks for pointing this out.

> What's leading you to conclude the import isn't being executed? You
> realise, I trust, that the module's code will only be executed on the
> first call to __init__()?
>

Well. Putting it in a "try" inside __init__() doesn't do anything. The
import never happens. And thus if I make a call in any of the methods, it
fails with an error message. A NameError IIRC.
 
> You are right in assuming that __init__() is called once per instance
> created, and it's legitimate to make an import conditional in the way
> you have because of the "execute code only once" behavior - if the
> module is already in sys.modules then it won't be re-imported, the
> existing one will be used.
> 

This is what even my understanding is. But am afraid to say that this
understanding is not implemented in Python. Have you tried doing this?
Does it work for you?

> Having said all that, I still don't see why you can't just put the
> try/except at the top level of your code and have color be a global. Why
> repeat the attempted import and the computation for each object you
> create? Alternatively, do it at the class level, so it's only executed
> once when the class is declared?
> 

Hmmm!! This is where I might not have done my homework.

I just tried to import the same class (Log) the following way and it worked.

from module import Log

It worked.

Now I have some questions.

Going with your point of try/except imports at the top level, I am having
multiple imports at the top level for the multiple classes that I have in
the module. Not everything from the top level imports is required for the
class Log (Say, just one module is what is required).
So when I do a `from module import Log`, do all the modules at the  top
level get imported? My understanding says Yes, and if that's true, that's
bad IMO. (Sorry! I'd really not thought about this when reading about
Python module imports)

My ultimate goal is to make all my classes as independent as possible while
keeping them as lightweight as possible. If all top level module import
statements are getting executed during a `from module import class`, this
is _not_ lightweight IMO.

That's what led me to try imports in __init__() but unfortunately I haven't
seen that working for me even once.

Ritesh
-- 
If possible, Please CC me when replying. I'm not subscribed to the list.



From Karsten.G.Weinert at googlemail.com  Thu Aug  9 10:54:10 2007
From: Karsten.G.Weinert at googlemail.com (Karsten W.)
Date: Thu, 09 Aug 2007 07:54:10 -0700
Subject: py2exe, command line parameter problem
Message-ID: <1186671250.863328.204810@r34g2000hsd.googlegroups.com>

Hello,
my small program is a Tkinter-App which supports some command line
options. When the app is started within the python environment,
everything works fine. When the py2exe-frozen app is started,
everything works until I pass command line parameters. Then the gui
window is not displayed.

It's python 2.3 on WinXp with py2exe 0.6.6.

How can I debug this behaviour?

Any hint appreciated,
Karsten.



From pacman128 at gmail.com  Tue Aug 14 15:49:16 2007
From: pacman128 at gmail.com (Paul Carter)
Date: Tue, 14 Aug 2007 19:49:16 -0000
Subject: module: zipfile.writestr - line endings issue
In-Reply-To: <1187112768.095414.223640@w3g2000hsg.googlegroups.com>
References: <1187107452.905165.45700@l70g2000hse.googlegroups.com>
	<1187110504.154878.317460@19g2000hsx.googlegroups.com>
	<1187112768.095414.223640@w3g2000hsg.googlegroups.com>
Message-ID: <1187120956.574400.99170@g4g2000hsf.googlegroups.com>

On Aug 14, 1:32 pm, towers <damondo... at googlemail.com> wrote:
> Thanks - your code works for me also.
>
> But I still get the issue when I read the file directly and add it to
> the archive.
>
> Say if I:
>
> 1. Use the test.csv file created with your code - currently the line
> endings look good (viewed in notepad on Win XP)
> 2. Run the following code:
>
> # begin code
> import zipfile
> import os.path
>
> # Now, create the zipfile
> dfile = open('test.csv', 'r')
> zip_file = zipfile.ZipFile(r'C:\temp\ice\line endings\test.zip', 'w',
> zipfile.ZIP_DEFLATED)
> zip_file.writestr('test.csv',dfile.read())
> dfile.close()
> zip_file.close()
>
> 3. Then extract the file and the file endings have been corrupted. Now
> one long line in notepad. (Other programs interpret correctly though.)
>
> Maybe the issue lies with this way (i.e. dfile.read()) of writing the
> file to the archive...possibly.
>
> Damon
>

Please don't top post.

The problem is with how you are opening the file. You need to open in
binary mode if you wish to read your file unaltered. Also, file() is
preferred over open() these days I think. Use:

dfile = file('test.csv', 'rb')

--
Paul Carter



From rbygscrsepda at gmail.com  Mon Aug  6 22:45:23 2007
From: rbygscrsepda at gmail.com (rbygscrsepda at gmail.com)
Date: Tue, 07 Aug 2007 02:45:23 -0000
Subject: Relative-importing *
In-Reply-To: <87zm15870h.fsf@benfinney.id.au>
References: <1185559874.299008.167010@x40g2000prg.googlegroups.com>
	<871weth2gg.fsf@benfinney.id.au>
	<pan.2007.07.28.06.17.39.399342@REMOVE.THIS.cybersource.com.au>
	<46ae3894$0$19609$426a34cc@news.free.fr>
	<1186200218.666444.254200@q3g2000prf.googlegroups.com>
	<87vebv9yrr.fsf@benfinney.id.au>
	<1186363732.188847.48070@q3g2000prf.googlegroups.com>
	<87zm15870h.fsf@benfinney.id.au>
Message-ID: <1186454723.425679.220510@q3g2000prf.googlegroups.com>

On Aug 6, 12:19 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> rbysam... at gmail.com writes:
> > (In addition, it probably would make the program somewhat slower to
> > have an internal class inside every module, and performance is
> > important to me, as I'm planning to use this project in a future
> > game.
>
> This is known as "premature optimisation", and it's harmful. It's
> folly to avoid a core part of the language because you're worried
> about hypothetical performance issues.
>
> Instead, write your program so that it's easy to understand and
> maintain; then, if it's noticeably slow, *measure* the performance
> using profiling so you know exactly what is slow; then, and only then,
> work on speeding up the slow parts.
>
> > These modules are not going to have full-fledged object construction
> > and so forth. I don't want to construct and use objects at all
>
> If that's truly what you desire, you're using the wrong
> language. Everything inPythonis an object, even if you don't use
> object-oriented programming.
>
> > it seems like a waste of time and memory to me to inherit __new__,
> > __del__, and so on.
>
> You've stated that you're a beginner to programming, so you probably
> are unaware that this statement has no basis in how class inheritance
> actually works. The point is that inherited behaviour is implemented
> in *one* place, not that it's repeated everywhere.
>
> Moreover, this is a further expression of your tendency for premature
> optimisation. You should aim instead to write code naturally (learning
> what's natural when you're a beginner), and only once you have
> something that *works* should you think about performance issues.
>
> > All that I want these modules to do is to encapsulate varying
> > information and behavior for /other/ objects to use.)
>
> This sounds like an ideal case for seeting up a class hierarchy for
> this move behaviour.
>
> > But regardless of if it's the "right thing to do", do you all think
> > it's an unintended bug?
>
> Do we think what is an unintended bug?
>
> I think if you go out of your way to avoid the class inheritance
> system for implementing what looks strongly like a hierarchy of
> behaviour, you will have design bugs. Hopefully now that you're
> reading this thread, they won't be *unintended* bugs; whether you
> *intentionally* proceed with a buggy design is up to you :-)
>
> --
>  \        "With Lisp or Forth, a master programmer has unlimited power |
>   `\     and expressiveness. WithPython, even a regular guy can reach |
> _o__)                            for the stars."  -- Raymond Hettinger |
> Ben Finney

I understand what you're saying; thank you for the advice. :) But
unfortunately, my original question wasn't completely answered.

I wasn't asking about if my own program had a bug, in the first place.
I was asking if the error I talked about in the first post was a bug
in the Python compiler itself. It's undocumented, and so it seems
unintended--especially since importing * is a feature built in to
Python on purpose, whether or not it's easily abused or if it's
useful.

Here's the error again--whenever you try to import * from a relative
package like ., .., .sibling, ..cousin, and any other package name
starting with "*", you get an error.

Specifically, in Python 1.5, all of the following generate the error
below:

    from . import *
    from .sibiling_package import *
    from .. import *
    from ..cousin_package import *

    SyntaxError: 'import *' not allowed with 'from .'

Importing * is a feature, but this seems like an artificial
inconsistency to me. It's as if the compiler raises an error when it
tries to import * as soon as it sees "from .", regardless of what
comes after it. So is this a bug in python? And if it happens to be a
bug, how can I alert the developers of the python compiler?

Again, thank you! :)



From james.p.news at gmail.com  Thu Aug 23 15:54:17 2007
From: james.p.news at gmail.com (james.p.news at gmail.com)
Date: Thu, 23 Aug 2007 19:54:17 -0000
Subject: libgmail failure
In-Reply-To: <1187841574.800105.219970@z24g2000prh.googlegroups.com>
References: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
	<1187841574.800105.219970@z24g2000prh.googlegroups.com>
Message-ID: <1187898857.060464.175200@z24g2000prh.googlegroups.com>

Thanks!  That worked brilliantly.

-James



From jeffrey at fro.man  Sun Aug 19 12:48:28 2007
From: jeffrey at fro.man (Jeffrey Froman)
Date: Sun, 19 Aug 2007 09:48:28 -0700
Subject: How to find script's directory
References: <mailman.2163.1187529606.22759.python-list@python.org>
Message-ID: <13cgt2t39d2m32@corp.supernews.com>

Papalagi Pakeha wrote:

> I guess I could do it with a little help of os.path.realpath() for all
> those cases where absolute or relative path was used. But how should I
> approach it when it's invoked as plain 'blah.py' because its directory
> name is in $PATH?


Use the value of __file__ rather than sys.argv[0] -- it contains the
directory information. You may still need to normalize the value using
various os.path functions.


Jeffrey


From rschroev_nospam_ml at fastmail.fm  Sat Aug 11 17:10:18 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sat, 11 Aug 2007 21:10:18 GMT
Subject: Something in the function tutorial confused me.
In-Reply-To: <qdpvi.2225$ZW4.461@trndny04>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
	<46B8626A.2070303@bigfoot.com>
	<mailman.1726.1186537161.22759.python-list@python.org>
	<5hsoi3F3mlni2U1@mid.individual.net> <f9ceb9$jsm$1@sea.gmane.org>
	<1186581124.3383.55.camel@dot.uniqsys.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
	<slrnfbk19k.20o.horpner@FIAD06.norwich.edu>
	<1i2nhxn.tme05x17r39odN%aleax@mac.com>
	<m3hvi.37606$G23.6240@newsreading01.news.tds.net>
	<qdpvi.2225$ZW4.461@trndny04>
Message-ID: <_Apvi.47643$p5.1534144@phobos.telenet-ops.be>

Gregory D. Weber schreef:
> Neil Cerutti wrote:
>> On 2007-08-11, Alex Martelli <aleax at mac.com> wrote:
>>> Neil Cerutti <horpner at yahoo.com> wrote:
>>>    ...
>>>> The Python Language Reference seems a little confused about the
>>>> terminology.
>>>>
>>>>   3.4.7 Emulating numeric types
>>>>   6.3.1 Augmented assignment statements
>>>>
>>>> The former refers to "augmented arithmetic operations", which I
>>>> think is a nice terminology, since assignment is not necessarily
>>>> taking place. Then the latter muddies the waters.
>>> Assignment *IS* "necessarily taking place"; if you try the augmented
>>> assignment on something that DOESN'T support assignment, you'll get an
>>> exception.  Consider:
>>>
>>>>>> tup=([],)
>>>>>> tup[0] += ['zap']
>>> Traceback (most recent call last):
>>>   File "<stdin>", line 1, in <module>
>>> TypeError: 'tuple' object does not support item assignment
>>>
>>> Tuples don't support item ASSIGNMENT, and += is an ASSIGNMENT,
>>> so tuples don't allow a += on any of their items.
>>>
>>> If you thought that += wasn't an assignment, this behavior and
>>> error message would be very problematic; since the language
>>> reference ISN'T confused and has things quite right, this
>>> behavior and error message are perfectly consistent and clear.
>> Thanks for the correction. I was under the illusion that
>> sometimes augmented assignment would instead mutate the
>> object.
>>
> 
> I too thought += was an assignment.  And it bit me very painfully a few weeks ago.

It is an assignment, but not only an assignment: first either the 
creation of a new object (in case of immutable objects) or the 
modification of an existing object (in case of mutable objects), than an 
assignment.

> If it's an assignment, then wouldn't "x += y" mean the same thing as "x = x + y"?

No:
- x += y, x is only evaluated once
- in x += y, the operation is performed in-place if possible, meaning 
that (quoting from the language reference): rather than creating a new 
object and assigning that to the target, the old object is modified instead

> If so, why does an assignment to variable a, below, have the *side effect* of changing variable b ... ?
> 
>>>> a = [1, 2, 3]
-> A list is created and assigned to a
>>>> b = a
-> That list is also assigned to b
>>>> b
> [1, 2, 3]
>>>> a += [4]
-> The list is modified (the list [4] is added to it) and assigned to a. 
It was already assigned to a, so that assignment doesn't do very much in 
this case. But it is performed.
>>>> a
> [1, 2, 3, 4]
>>>> b
> [1, 2, 3, 4]
-> Both a and b are still bound to the original (but now modified) list 
object

> ... but using the "x = x + y" style, the assignment to variable c, below, does *not* have a side effect on variable d (as indeed it should not!)?
> 
>>>> c = [1, 2, 3]
-> A list is created and assigned to c
>>>> d = c
-> That list is also assigned to d
>>>> d
> [1, 2, 3]
>>>> c = c + [4]
-> A new list object is created (the sum of the original one and the 
list [4]) and assigned to c
>>>> c
> [1, 2, 3, 4]
-> c is now bound to the new list object
>>>> d
> [1, 2, 3]
-> ... while d is still bound to the original list object


I hope this clears up things a bit...

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From naga86 at gmail.com  Wed Aug 22 00:03:56 2007
From: naga86 at gmail.com (Nagarajan)
Date: Tue, 21 Aug 2007 21:03:56 -0700
Subject: Server-side scripting in python
In-Reply-To: <gi6rp4-mes.ln1@lairds.us>
References: <1187614732.519547.296020@j4g2000prf.googlegroups.com>
	<gi6rp4-mes.ln1@lairds.us>
Message-ID: <1187755436.972359.293360@i13g2000prf.googlegroups.com>

On Aug 21, 6:40 pm, cla... at lairds.us (Cameron Laird) wrote:
> In article <1187614732.519547.296... at j4g2000prf.googlegroups.com>,Nagarajan  <nag... at gmail.com> wrote:
> >Hi group,
> >I need to develop a web application. I am in a fix as to choose among
> >the various server-side scripting options. I want to explore python
> >(am a newbie) to gain expertise and upon search, I learnt about
> >PSP(Python Server Pages) that uses Jython as its scripting language.
> >Is it a better option over PHP or Perl? Could anyone point out the
> >pros and cons of using PSP over others?
>
>                         .
>                         .
>                         .
> I suspect that several of us don't understand your question.
>
> Python supports several--arguably, a plethora, more than any other
> language--distinct "frameworks" for server-side scripting of Web
> applications <URL:http://wiki.python.org/moin/WebFrameworks>.
> PSP certainly is among these, although it's recommended <URL:http://colorstudy.com/docs/shootout.html> less often than
> several others.  Is PSP better than PHP or Perl?  First, do you
> understand that PSP isn't directly comparable to PHP or Perl?  The
> latter two are languages, while PSP is a Web framework.  In any
> case, the answer is certain to be, "it depends".  There certainly
> are situations for each of PSP, PHP, Perl, and many other technol-
> ogies.
>
> I summarize:  if you have an interest in practicing Python while
> building Web applications, your prospects certainly are bright;
> you'll receive abundant help from the folks here and elsewhere.
> For us to provide more specific details about Perl, PSP, and so
> on, meaningful to your own needs, will only be possible when you
> articulate the latter more fully <URL:http://catb.org/~esr/faqs/smart-questions.html>.

Let me phrase my problem in a finer way.
I have done simple projects in python.
I wanted to explore web programming facet of python. The problem at my
hand is to develop an email web client. I've developed web
applications in PHP. I need to evaluate python-based web frameworks to
make a smart choice of the web framework or a language like PHP, Perl
based on performance predominantly. Do I make myself clear now?

Thanks for all the help extended.




From rpk.general at gmail.com  Sun Aug 12 01:08:26 2007
From: rpk.general at gmail.com (Rohit)
Date: Sun, 12 Aug 2007 05:08:26 -0000
Subject: Database intensive application
Message-ID: <1186895306.237395.189530@z24g2000prh.googlegroups.com>

I am a novice. I want to know whether Python can be used to develop
client/server database and web applications like .NET. Which is the
best book/source to learn Python?



From nachogomez at gmail.com  Sun Aug  5 03:17:43 2007
From: nachogomez at gmail.com (=?UTF-8?Q?Ra=C3=BAl_G=C3=B3mez_C.?=)
Date: Sun, 5 Aug 2007 03:17:43 -0400
Subject: Tkinter or wxpython?
In-Reply-To: <1186122505.996640.262520@d55g2000hsg.googlegroups.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186122505.996640.262520@d55g2000hsg.googlegroups.com>
Message-ID: <684b0a740708050017h373397fgc307819583c0b2d9@mail.gmail.com>

Well, for a newbie I think the best choice is
PythonCard<http://pythoncard.sourceforge.net/>,
is a framework based on wxPython but much more simple, check it out!

On 8/3/07, Glenn Hutchings <zondo42 at googlemail.com> wrote:
>
> On Aug 3, 1:00 am, "wang frank" <f... at hotmail.co.jp> wrote:
> > I want to build a GUI to execut python script. I found TKinter and
> > wxpython. Which one is easier for a newbie? and which one is better?
>
> Well, Tkinter comes with Python, so newbies can get up and running
> straight away without having to download and install anything else.
> And there are probably lots more examples out there that a newbie can
> look at and learn from.  As for *better*, wxPython has a lot more
> kinds of widgets in it, which will make writing GUIs less tedious in
> the long run, and the widgets look a lot nicer too.
>
> Glenn
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From kyosohma at gmail.com  Fri Aug  3 09:34:43 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 03 Aug 2007 06:34:43 -0700
Subject: Help: GIS
In-Reply-To: <1186112804.718290.207580@z24g2000prh.googlegroups.com>
References: <1186112804.718290.207580@z24g2000prh.googlegroups.com>
Message-ID: <1186148083.009159.89310@j4g2000prf.googlegroups.com>

On Aug 2, 10:46 pm, zxo102 <zxo... at gmail.com> wrote:
> Hi,
>     I am new in GIS area and need your suggestions for where I can
> start from.  I have a python based web application with a database.
> Now I would like to add a GIS map into my application. When a user
> clicks a certain area in the GIS map, it can grab the data from the
> database via my python based application. Do I have to use MapServer
> or Grass or some other  backends for this purpose?
>    Thanks  a lot.
>
> Ouyang

While I am not a part of our GIS department, they use ArcGIS which has
Python support built in. If that's what you're using, you should be
able to use the examples given on ESRI's website:
http://www.spatialvision.com.au/html/tips-python-arc9.htm

Hmmm...not much there. Here are some other links I found:

http://nrm.salrm.uaf.edu/~dverbyla/arcgis_python/index.html
http://www.ollivier.co.nz/publication/uc2004/python_workshop/sld008.htm
http://www.3dartist.com/WP/python/pycode.htm

I don't know if these will be much help. You really need to just dig
in and start coding. I would recommend "Programming Python 3rd Ed." by
Lutz if you want something in hard copy. "Dive Into Python" is a free
book that's online that I'm told is very good. Both have good
examples, some of which are involved. All the web oriented Python
books are a few years old, but the code in them still works, for the
most part.

Mike



From fabioztessitore at libero.it  Wed Aug  1 03:53:41 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 01 Aug 2007 07:53:41 GMT
Subject: Error with Tkinter and tkMessageBox
References: <46af71b7$0$10619$4fafbaef@reader2.news.tin.it>
	<1185909168.055341.90910@d30g2000prg.googlegroups.com>
	<46af8c5d$0$10619$4fafbaef@reader2.news.tin.it>
	<mailman.1402.1185922034.22759.python-list@python.org>
Message-ID: <46b03c04$0$4796$4fafbaef@reader4.news.tin.it>

Il Tue, 31 Jul 2007 18:45:57 -0400, jim-on-linux ha scritto:

> Try This:
> 
>  def reply():
>          showinfo('ciao','hello')
> 

I've tried without success ... thanks

I've also discovered that when I (or some other prog using tkinter) 
display menu, the underscore is an ugly little black box. So, tkinter 
don't work fine on my machine. What a pity!

thanks, all, bye


From mark.dufour at gmail.com  Wed Aug 22 11:00:19 2007
From: mark.dufour at gmail.com (srepmub)
Date: Wed, 22 Aug 2007 15:00:19 -0000
Subject: Shed Skin Python-to-C++ compiler 0.0.23
In-Reply-To: <1187725658.819624.309370@r34g2000hsd.googlegroups.com>
References: <mailman.3.1187613108.26576.python-list@python.org>
	<1187725658.819624.309370@r34g2000hsd.googlegroups.com>
Message-ID: <1187794819.745225.240130@j4g2000prf.googlegroups.com>


> Adding socket support would certainly open the door for many common
> classes applications.  If I had my pick, I say, sockets and then re.

Thanks. Especially sockets should be not too hard to add, but I
probably won't work on these directly myself. Let me know if you are
interested.. :-)

> BTW, I gatta say projects like shedskin and pypy are the most exciting
> python projects I'm aware of.  Please keep of the good work.  I'm so
> excited about the day I can begin using shedskin for the types of
> projects I use python on.

I'm practically working alone on Shedskin, so the better bet will be
PyPy, unless I start getting more help.

BTW I usually add a link to the homepage, but somehow I forgot this
time:

http://mark.dufour.googlepages.com


Thanks!
Mark Dufour.



From rcdailey at gmail.com  Thu Aug  2 14:53:14 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Thu, 2 Aug 2007 13:53:14 -0500
Subject: XML Processing
In-Reply-To: <1186080339.344993.167670@z24g2000prh.googlegroups.com>
References: <1186080339.344993.167670@z24g2000prh.googlegroups.com>
Message-ID: <496954360708021153l2b20f522ia690707a8fdd7aa3@mail.gmail.com>

Both strings in your example are exactly the same, unless I'm missing
something.

On 8/2/07, Roman <rgelfand2 at hotmail.com> wrote:
>
> Is there a package that converts a string that contains special
> characters in xml to to literal value.  For instance, converts string
> http://myhome/&param to http://myhome/&param.
>
> Thanks in advance
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
An HTML attachment was scrubbed...
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From bgoldenberg at gmail.com  Thu Aug  9 18:14:46 2007
From: bgoldenberg at gmail.com (Benjamin Goldenberg)
Date: Thu, 09 Aug 2007 22:14:46 -0000
Subject: Querying Graphics Card Name
In-Reply-To: <46bb8ff6$0$25982$afc38c87@news.optusnet.com.au>
References: <1186686984.160312.175270@i13g2000prf.googlegroups.com>
	<46bb8ff6$0$25982$afc38c87@news.optusnet.com.au>
Message-ID: <1186697686.543735.261100@i13g2000prf.googlegroups.com>

On Aug 9, 4:06 pm, Richard Jones <richardjo... at optushome.com.au>
wrote:
> Benjamin Goldenberg wrote:
> > I would like to find out the name of the graphics card of the machine
> > my program is running on. I have looked into the pyopengl module, and
> > using them to query the card, but it seems like there ought to be a
> > simpler way to find this out without setting up a glcontext. Does
> > anyone have any ideas?
>
> You need a context if you're going to ask OpenGL to tell you what the card
> is. To find out any other way would be highly platform-specific, possibly
> though looking in the /proc directory on Linux, and who-knows-where-else on
> other platforms.
>
> Also, have a look at tools/info.py in the pyglet project
> <http://www.pyglet.org/>
>
>     Richard

Thanks for the reference, but I was unable to find tools/info.py in
pyglet. What would be the full path to this file?
Thanks.



From grante at visi.com  Fri Aug 31 11:52:22 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 31 Aug 2007 15:52:22 -0000
Subject: Looking for Delaunay triangulation module...
Message-ID: <13dge9m2339ka68@corp.supernews.com>

Can anybody point me to a Delaunay triangulation module (for
Win32)?  I'm currently using http://flub.stuffwillmade.org/delny/ under Linux, but I have
been unable to find a build for Windows. I don't have the tools
(or skills) to build libqhull and Pythion extensions on Win32).

I've also found the delaunay module in scipy's "sandbox".  I
could never get that module to work under Linux, and I can't
build it for Windows anyway.

So for lack of a delaunay module, I'm stuck trying to port my
application to Win32.

I've spent some time Googling and found various references to
pur Python delaunay modules that were abandoned because they
were slow (though I haven't been able to find any of the actual
modules).  Slow is better than none. ;)

-- 
Grant Edwards                   grante             Yow! An air of FRENCH FRIES
                                  at               permeates my nostrils!!
                               visi.com            


From ldo at geek-central.gen.new_zealand  Fri Aug 31 00:48:02 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 31 Aug 2007 16:48:02 +1200
Subject: Code design problem
References: <1188389375.238847.298320@w3g2000hsg.googlegroups.com>
Message-ID: <fb86dd$bd0$2@lust.ihug.co.nz>

In message <1188389375.238847.298320 at w3g2000hsg.googlegroups.com>, Marco
Nawijn wrote:

> The problem I face is that the implementation of the application class
> is completely different for the local and remote case. The local case is a
> straightforward implemenation using the subprocess module, the remote
> case is a CORBA implementation.

Any reason why you need to use something as complex as CORBA? On *nix
systems, depending on filesystem access issues, the difference between
local and remote execution of commands isn't much more than

    cmd

versus

    ssh host cmd



From managerrrr at gmail.com  Tue Aug 21 19:15:15 2007
From: managerrrr at gmail.com (managerrrr at gmail.com)
Date: Tue, 21 Aug 2007 23:15:15 -0000
Subject: Free Air Conditioners!!!!!!
Message-ID: <1187738115.972271.94080@r23g2000prd.googlegroups.com>

http://freeairconditioners.blogspot.com/



From uymqlp502 at sneakemail.com  Fri Aug 31 01:18:36 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Thu, 30 Aug 2007 22:18:36 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <mailman.181.1188527203.28954.python-list@python.org>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
Message-ID: <1188537516.622167.115080@z24g2000prh.googlegroups.com>


> I've always wondered... Are the compilers (or interpreters), which take
> these programs to machine code, also formally proven correct?

No, they are not formally proven correct (too complicated for that),
but I believe they are certified to a higher level than your "typical"
compiler. I think that Ada compilers used for certain safety-critical
applications must meet higher standards than, say, GNU Ada, for
example.

And the OS
> in which those programs operate, are they also formally proven correct?

Same as above, if I am not mistaken.

> And the hardware, microprocessor, electric supply, etc. are they also
> 'proven correct'?

I think the microprocessors used for flight control, for example, are
certified to a higher level than standard microprocessors.

How would you prove a power supply to be "correct"? I'm sure they meet
higher reliability standards too.




From vasudevram at gmail.com  Sun Aug 26 10:45:15 2007
From: vasudevram at gmail.com (vasudevram)
Date: Sun, 26 Aug 2007 14:45:15 -0000
Subject: Joining Big Files
In-Reply-To: <1188092913.645157.15370@o80g2000hse.googlegroups.com>
References: <1188035844.616831.205350@i38g2000prf.googlegroups.com>
	<1188090939.364787.296630@r34g2000hsd.googlegroups.com>
	<1188092913.645157.15370@o80g2000hse.googlegroups.com>
Message-ID: <1188139515.349468.315290@q5g2000prf.googlegroups.com>

On Aug 26, 6:48 am, Paul McGuire <pt... at austin.rr.com> wrote:
> On Aug 25, 8:15 pm, Paul McGuire <pt... at austin.rr.com> wrote:
>
>
>
> > On Aug 25, 4:57 am, mosscliffe <mcl.off... at googlemail.com> wrote:
>
> > > I have 4 text files each approx 50mb.
>
> > <yawn> 50mb? Really?  Did you actually try this and find out it was a
> > problem?
>
> > Try this:
> > import time
>
> > start = time.clock()
> > outname = "temp.dat"
> > outfile = file(outname,"w")
> > for inname in ['file1.dat', 'file2.dat', 'file3.dat', 'file4.dat']:
> >     infile = file(inname)
> >     outfile.write( infile.read() )
> >     infile.close()
> > outfile.close()
> > end = time.clock()
>
> > print end-start,"seconds"
>
> > For 4 30Mb files, this takes just over 1.3 seconds on my system.  (You
> > may need to open files in binary mode, depending on the contents, but
> > I was in a hurry.)
>
> > -- Paul
>
> My bad, my test file was not a text file, but a binary file.
> Retesting with a 50Mb text file took 24.6 seconds on my machine.
>
> Still in your working range?  If not, then you will need to pursue
> more exotic approaches.  But 25 seconds on an infrequent basis does
> not sound too bad, especially since I don't think you will really get
> any substantial boost from them (to benchmark this, I timed a raw
> "copy" command at the OS level of the resulting 200Mb file, and this
> took about 20 seconds).
>
> Keep it simple.
>
> -- Paul

There are (at least) another couple of approaches possible, each with
some possible tradeoffs or requirements:

Approach 1. (Least amount of code to write - not that the others are
large :)

Just use os.system() and the UNIX cat command - the requirement here
is that:
a) your web site is hosted on *nix (ok, you can do it if on Windows
too - use copy instead of cat, you might have to add a "cmd /c "
prefix in front of the copy command, and you have to use the right
copy command syntax for concatenating multiple input files into one
output file).

b) your hosting plan allows you to execute OS level commands like cat,
and cat is in your OS PATH (not PYTHONPATH). (Similar comments apply
for Windows hosts).

import os
os.system("cat file1.txt file2.txt file3.txt file4.txt >
file_out.txt")

cat will take care of buffering, etc. transparently to you.

Approach 2: Read (in a loop, as you originally thought of doing) each
line of each of the 4 input files and write it to the output file:

("Reusing" Paul McGuire's code above:)

outname = "temp.dat"
outfile = file(outname,"w")
for inname in ['file1.dat', 'file2.dat', 'file3.dat', 'file4.dat']:
    infile = file(inname)
    for lin in infile:
        outfile.write(lin)
    infile.close()
outfile.close()
end = time.clock()

print end-start,"seconds"

# You may need to check that newlines are not removed in the above
code, in the output file.  Can't remember right now. If they are, just
add one back with:

outfile.write(lin + "\n") instead of  outfile.write(lin) .

( Code not tested, test it locally first, though looks ok to me. )

The reason why this _may_ not be much slower than manually coded
buffering approaches, is that:

a) Python's standard library is written in C (which is fast),
including use of stdio (the C Standard IO library, which already does
intelligent buffering)
b) OS's do I/O buffering anyway, so do hard disk controllers
c) from some recent Python version, I think it was 2.2, that idiom
"for lin in infile" has been (based on somethng I read in the Python
Cookbook) stated to be pretty efficient anyway (and yet (slightly)
more readable that earlier followed approaches of reading a text
file).

Given all the above facts, it probably isn't worth your while to try
and optimize the code unless and until you find (by measurements) that
it's too slow - which is a good practice anyway:

http://en.wikipedia.org/wiki/Optimization_(computer_science)

Excerpt from the above page (its long but worth reading, IMO):

"Donald Knuth said, paraphrasing Hoare[1],

"We should forget about small efficiencies, say about 97% of the time:
premature optimization is the root of all evil." (Knuth, Donald.
Structured Programming with go to Statements, ACM Journal Computing
Surveys, Vol 6, No. 4, Dec. 1974. p.268.)

Charles Cook commented,

"I agree with this. It's usually not worth spending a lot of time
micro-optimizing code before it's obvious where the performance
bottlenecks are. But, conversely, when designing software at a system
level, performance issues should always be considered from the
beginning. A good software developer will do this automatically,
having developed a feel for where performance issues will cause
problems. An inexperienced developer will not bother, misguidedly
believing that a bit of fine tuning at a later stage will fix any
problems." [2]
"

HTH
Vasudev
-----------------------------------------
Vasudev Ram
http://www.dancingbison.com
http://jugad.livejournal.com
http://sourceforge.net/projects/xtopdf
-----------------------------------------




From S.Mientki-nospam at mailbox.kun.nl  Wed Aug  1 05:04:22 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Wed, 01 Aug 2007 11:04:22 +0200
Subject: Reload after an exception, not possible ?
In-Reply-To: <mailman.1413.1185936712.22759.python-list@python.org>
References: <ba54c$46afa770$d443bb3a$16612@news.speedlinq.nl>
	<mailman.1413.1185936712.22759.python-list@python.org>
Message-ID: <7be74$46b04b15$d443bb3a$12979@news.speedlinq.nl>

Steve Holden wrote:
> Stef Mientki wrote:
>> hello,
>>
>> I've a graphical application (wxPython),
>> where the code in the main GUI loop is given below.
>>
>>
>> 1    JAL_Loaded = False
>> 2    while len(App_Running) > 0:
>> 3        if JALsPy_globals.State == SS_Run:
>> 4            try:
>> 5                if JAL_Loaded:
>> 6                    reload ( JAL_simulation_file )
>> 7                else:
>> 8                    JAL_Loaded = True
>> 9                    import JAL_simulation_file
>> 10           except JALsPy_globals.Reload_Exception:
>> 11               JALsPy_globals.State = SS_Halt
>>
>>
>> The first time the while loop is entered,
>> JAL_Loaded is False (line 1),
>> and when I press some button,
>> the code will enter at line 8,
>> importing a module, that has executable code with an infinite loop.
>>
>> To exit this infinite loop, an exception is generated (by a button 
>> press),
>> and program comes back in the above while-loop line (10,11,2).
>>
>> So far so good.
>>
>> Then I change the code in the imported file,
>> and when I start the engine again,
>> the flag JAL_Loaded is True, so I don't import,
>> but I reload the file.
>>
>> Now I get the next exception
>>    UnboundLocalError: local variable 'JAL_simulation_file' referenced 
>> before assignment
>>
>> So obviously I can't reload but have to do an import again
>> (which makes the code much simpler ;-)
>> but I don't understand why the reload raises an exception ????
>>
> You have an assignment to JAL_simulation_file elsewhere inside the same 
> function,
No these are the only 2 uses of "JAL_simulation_file" in the whole project.

  later in the code. This means that Python will assume that it
> is local to the function, but the import statement will affect the 
> module namespace rather than the function namespace.
> 
> In other words, your code is roughly equivalent to what follows, with 
> the added complexity that the illegal reference isn't triggered until 
> the second iteration of a loop.
> 
>  >>> def f():
> ...   print os
> ...   import os
> ...   os = "Something"
> ...
>  >>> f()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "<stdin>", line 2, in f
> UnboundLocalError: local variable 'os' referenced before assignment
>  >>>
> 
> The solution? Don't assign to JAL_simulation_file, and the function will 
> use the local instead.
> 

The solution is much simpler, but I don't understand why the "import",
which really reloads the changed code in JAL_simulation_file,
works the second time :-(

2    while len(App_Running) > 0:
3        if JALsPy_globals.State == SS_Run:
4            try:
9                import JAL_simulation_file
10           except JALsPy_globals.Reload_Exception:
11               JALsPy_globals.State = SS_Halt

cheers,
Stef Mientki


From bdesth.quelquechose at free.quelquepart.fr  Thu Aug  2 10:30:53 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 02 Aug 2007 16:30:53 +0200
Subject: __call__ considered harmful or indispensable?
In-Reply-To: <mailman.1527.1186079415.22759.python-list@python.org>
References: <mailman.1527.1186079415.22759.python-list@python.org>
Message-ID: <46b24200$0$19638$426a74cc@news.free.fr>

skip at pobox.com a ?crit :
> I don't personally use __call__ methods in my classes, but I have
> encountered it every now and then here at work in code written by other
> people.  The other day I replaced __call__ with a more obvious method name,
> so now instead of executing
> 
>     obj(foo, bar, baz)
> 
> the code in question is
> 
>     obj.execute(foo, bar, baz)
> 
> In this case there was a bug.  Depending on inputs, sometimes obj
> initialized to a class, sometimes an instance of that class.  (I fixed that
> too while I was at it.)   The problem was that the use of __call__ obscured
> the underlying bug by making the instance as well as the class callable.

I don't quite get the point here. A concrete example would be welcome.

> In this particular case it was clearly unnecessary and just obfuscated the
> code.  I'm wondering, are there some general cases where __call__ methods of
> a user-defined class are simply indispensable?

"simply indispensable", I don't know. FWIW, most of the features of 
Python are not "simply indispensable" !-)

Most of what you can do with a callable instance can be done with 
closures (and is usually done so in FPLs), but given Python's OO nature, 
it's sometimes clearer and simpler to use callable instances than 
closures. One example that comes to mind is partial application that I 
first saw implemented with closures in Django, then as a class in PEP 
309's example. Another common use case is parameterized function 
decorators, that are often cleaner (IMHO) when implemented as classes 
with __call__ than with three levels of nested funcs. In both cases, 
closures and callables implementations are functionally equivalent, and 
this is transparent for user code, so it's mostly a matter of 
readability and personal preferences...

As far as I'm concerned, I do use __call__ "every know and then". 
Usually, because I had to pass a callable to some API and needed to 
parameterize it (IOW, ad-hoc partial application).


From bj_666 at gmx.net  Thu Aug 23 17:14:48 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 23 Aug 2007 21:14:48 GMT
Subject: Redo: Problem with dynamic creation of classes.
References: <mailman.204.1187902527.32294.python-list@python.org>
Message-ID: <5j6bm8F3t3hraU1@mid.uni-berlin.de>

On Thu, 23 Aug 2007 16:55:21 -0400, Steven W. Orr wrote:

> So it looks like the IFRAMED2 class which inherits from D2 is starting out
> with the same id value for Encode as SNRMD which inherits from D, even
> though D2 defines its own Encode method.
> 
> Is it me of is it the interpreter doing something wrong?

Hard to tell without seeing where `IFRAMED2` is bound and without knowing
what you actually want to do.  Can you provide a self contained example
that people here can actually try!?

Ciao,
	Marc 'BlackJack' Rintsch


From steve at holdenweb.com  Fri Aug 31 21:50:34 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 21:50:34 -0400
Subject: Parameter Passing - String Variable Truncated ?
In-Reply-To: <fbag04$ugc$2@sea.gmane.org>
References: <1188604442.700651.94530@19g2000hsx.googlegroups.com>
	<fbag04$ugc$2@sea.gmane.org>
Message-ID: <46D8C56A.8020402@holdenweb.com>

Steve Holden wrote:
[...]
>> in_featclass = sys.argv[1]
> 
> Try
> 
>    in_featclass = sys.argv[1:]
> 
Sorry, that should have been

     in_featclass = " ".join(sys.argv[1:])+"\n"

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From DustanGroups at gmail.com  Tue Aug 28 21:09:46 2007
From: DustanGroups at gmail.com (Dustan)
Date: Wed, 29 Aug 2007 01:09:46 -0000
Subject: Check for dict key existence, and modify it in one step.
In-Reply-To: <1188324792.670603.208980@r29g2000hsg.googlegroups.com>
References: <1188311810.226363.295500@w3g2000hsg.googlegroups.com>
	<mailman.69.1188315800.28954.python-list@python.org>
	<1188324792.670603.208980@r29g2000hsg.googlegroups.com>
Message-ID: <1188349786.261196.80580@d55g2000hsg.googlegroups.com>

On Aug 28, 1:13 pm, rodrigo <rodrigo... at gmail.com> wrote:
> evan,
>
> yes, it does help. Works like it should:
>
> class CountingDictionary(dict):
>     def increment(self, key, delta=1):
>         self[key] = self.get(key, 0) + delta
>
> d = CountingDictionary()
> d.increment('cat')
> d.increment('dog',72)
> print d
>
> >>> {'dog': 72, 'cat': 1}
>
> Thanks!

You responded to the answer that made the least use of already
existing recourses in python. Just letting you know.



From NikitaTheSpider at gmail.com  Sun Aug 12 12:21:25 2007
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Sun, 12 Aug 2007 12:21:25 -0400
Subject: LRU cache?
References: <7x8x8ixomj.fsf_-_@ruckus.brouhaha.com>
Message-ID: <NikitaTheSpider-095707.12212412082007@news-server.nc.rr.com>

In article <7x8x8ixomj.fsf_-_ at ruckus.brouhaha.com>,
 Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

> Anyone got a favorite LRU cache implementation?  I see a few in google
> but none look all that good.  I just want a dictionary indexed by
> strings, that remembers the last few thousand entries I put in it.
> 
> It actually looks like this is almost a FAQ.  A well-written
> implementation would probably make a good standard library module.

This one works for me:
http://www.webfast.com/~skip/python/Cache.py

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


From rgilbert88 at comcast.net  Tue Aug 28 07:50:22 2007
From: rgilbert88 at comcast.net (Richard B. Gilbert)
Date: Tue, 28 Aug 2007 07:50:22 -0400
Subject: Let's Unite Against Jews and Mongrels!
References: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
	<1188300284.507909.126770@57g2000hsv.googlegroups.com>
Message-ID: <46D40BFE.2020301@comcast.net>

Dustan wrote:
> On Aug 27, 2:13 am, Nenad Milicevic - The Aryan Serb
> <i_hate_j... at shiftmail.com> wrote:
> 
>>Let's break the chains of Jewish and black domination!
> 
> 
> A) Why?
> B) What chains?
> 

Posting such as the one that started this thread are best ignored!

Unless, of course, someone has a working "Killbot".  If anyone has such 
a thing, please kill that "MI5victim" moron as well!



From mcl.office at googlemail.com  Thu Aug 23 10:23:20 2007
From: mcl.office at googlemail.com (mosscliffe)
Date: Thu, 23 Aug 2007 07:23:20 -0700
Subject: Symbolic Link
In-Reply-To: <mailman.87.1187737527.32294.python-list@python.org>
References: <1187475296.173269.263080@k79g2000hse.googlegroups.com>
	<iwWxi.28394$RX.20505@newssvr11.news.prodigy.net>
	<1187555373.202634.163160@57g2000hsv.googlegroups.com>
	<1187646982.760523.195750@i38g2000prf.googlegroups.com>
	<mailman.87.1187737527.32294.python-list@python.org>
Message-ID: <1187879000.370831.118780@j4g2000prf.googlegroups.com>

On 22 Aug, 00:05, Ian Clark <icl... at mail.ewu.edu> wrote:
> Hyuga wrote:
> > On Aug 19, 4:29 pm,mosscliffe<mcl.off... at googlemail.com> wrote:
> >> The source file is in an area which python can see, but not the
> >> browser.  I am trying to make a link in a browser friendly area so I
> >> can use it to display an image file.
>
> > You might want to try using an .htaccess file.  Place a file
> > called .htaccess in the "browser friendly area" and place in it the
> > line:
>
> > Options +FollowSymLinks
>
> > Assuming your hosting service will allow that, then it should work.
> > If not, then why not just copy the image files?  Storage is cheap
> > these days.
>
> > Hyuga
>
> My question would be why a symbolic link? Why not a hard link? Are the
> two directories on different mount points? After the script finishes
> does python need to see that image file again? Why not just move it?
>
> Ian

I just imagined a symbolic link would be quicker.

I have tested a hard link now and it seems to work fine.  I am
deleting the link/s at the end of the session/s.

I think a link is better than a move, because there is always a
possibility I might somehow delete the moved file and then I would
lose the original one.

Thanks for your help.

Richard



From http  Sat Aug  4 17:59:36 2007
From: http (Paul Rubin)
Date: 04 Aug 2007 14:59:36 -0700
Subject: the one python book
References: <mailman.1611.1186233912.22759.python-list@python.org>
Message-ID: <7xr6mjot9z.fsf@ruckus.brouhaha.com>

"dhr" <dima.hristov at gmail.com> writes:
> Is there a 'K&R" type of Python book? The book that you'd better have on 
> your shelf if you are going into Python? 

I don't think so, at least not if you are starting Python with
experience in other languages.  There are some books that are useful
but none are really crucial.  It's enough to just read the online
documentation, which will let you transfer your experience onto
Python, and then hang out here on clpy to soak up Python culture.

If you're less experienced in programming but not a complete beginner,
Dive Into Python looks pretty good and Python in a Nutshell also is
supposed to be excellent.  If you're a complete beginner, I'm not sure
what to suggest.


From jeff at jmcneil.net  Wed Aug 15 09:06:10 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Wed, 15 Aug 2007 09:06:10 -0400
Subject: PyCon 2008 - Call for Tutorial Ideas
In-Reply-To: <a9f39a410708150503n40999879j29745161ac8af9af@mail.gmail.com>
References: <a9f39a410708150503n40999879j29745161ac8af9af@mail.gmail.com>
Message-ID: <82d28c40708150606s1a5d06c4n29d0785df22344c2@mail.gmail.com>

Now, I'm not sure if this has been covered in great detail anywhere,
but I'd love to see something touching on interoperability with .Net
web services.

I've had a lot of success getting Python moved into our organization,
but this is where it gets difficult.  While I'm product focused, our
business focused groups rely very heavily on .Net, WS-*, WCF, and
SOAP.

It's one thing to get ZSI working with simple SOAP calls, it's quite
another to tie into a large-scale .Net based system.  I've managed to
get it working where I need to, but if I've found it difficult, I'm
sure others have as well.

Just an idea!

Jeff

On 8/15/07, Greg Lindstrom <gslindstrom at gmail.com> wrote:
> It's hard to believe, but the planning for PyCon 2008 is underway.  PyCon,
> an annual gathering of Python enthusiasts -- nearly 600 in Dallas last year
> -- will be held in Chicago next March 14-16, with one full "pre-conference"
> day, March 13, set aside for tutorials; classes given by Python honchos on
> various topics.  These sessions last 3 hours (plus a break) and in general
> are more detailed than the talks given during the actual conference.  Right
> now, we need to know what YOU want to see covered in these sessions.
>  Testing, GUI, web-apps, database, basic Python, advanced Python, objects,
> anything and everything Python is on the table at this point.  We have to
> narrow the field down to 10 or 15 and then find qualified presenters, so now
> is the time to start gathering ideas.
>
> What tutorials would you like to see offered?  Please response to:
> pycon-tutorials at python.org
>
> Thanks,
>
> Greg Lindstrom
> Tutorial Coordinator, PyCon 2008
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From tazmaster at rocketmail.com  Tue Aug  7 07:28:22 2007
From: tazmaster at rocketmail.com (Jim Langston)
Date: Tue, 7 Aug 2007 04:28:22 -0700
Subject: How to use C enum in Python CTypes?
References: <1186462639.872254.25660@z24g2000prh.googlegroups.com>
	<5hqgogF3ldifeU1@mid.uni-berlin.de>
	<1186478018.409193.188130@e9g2000prf.googlegroups.com>
Message-ID: <yIYti.4$HI1.1@newsfe02.lga>

"rozniy" <rozniy at gmail.com> wrote in message 
news:1186478018.409193.188130 at e9g2000prf.googlegroups.com...
> On Aug 7, 2:11 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Tue, 07 Aug 2007 04:57:19 +0000, rozniy wrote:
>> > typedef enum olss_tag
>> >    {
>> >    OLSS_AD,
>> >    OLSS_DA,
>> >    OLSS_DIN,
>> >    OLSS_DOUT,
>> >    OLSS_SRL,
>> >    OLSS_CT
>> >    }
>> > OLSS;
>>
>> > I managed to fudge the HDEV, UINT and PHDASS types as CTypes c_long(),
>> > but I am not sure how translate a C enum into Python...
>>
>> > This site
>> >http://python.net/crew/theller/ctypes/tutorial.html#bugs-todo-and-non...
>>
>> > says that enumeration types is not implemented,
>> > "Enumeration types are not implemented. You can do it easily yourself,
>> > using c_int as the base class."
>>
>> I would just define constants:
>>
>> (OLSS_AD,
>>  OLSS_DA,
>>  OLSS_DIN,
>>  OLSS_DOUT,
>>  OLSS_SRL,
>>  OLSS_CT) = map(ctypes.c_int, xrange(6))
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch- Hide quoted text -
>>
>> - Show quoted text -
>
>
> Wouldn't that assign integer values 0 to 5 to the things? I don't know
> if it'll give me the correct results.

Yes, that's how C's and C++'s enums work, unless an override is given (which 
I know you can do in C++ for sure).  Otherwise, they are just numbers 
starting at 0.  The size of the intergers (byte, 2 bytes, 4 bytes, etc..) is 
implemenation defined I believe, but an int normally works. 




From ptmcg at austin.rr.com  Fri Aug 31 23:40:22 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Fri, 31 Aug 2007 20:40:22 -0700
Subject: HowTo Use Cython on a Windows XP Box?
In-Reply-To: <rO3Ci.32$453.27@trndny02>
References: <rO3Ci.32$453.27@trndny02>
Message-ID: <1188618022.208258.15620@22g2000hsm.googlegroups.com>

On Aug 31, 9:06 pm, David Lees <debl2NoS... at verizon.net> wrote:
> August 31, 2007
>
> I just downloaded the current Cython release and have no problem running
> the cpython.py translator on the demo code.  But when I try compiling, I
> get an error complaining that my version of Python (which is the current
> 2.5.1 downloaded from python.org) was compiled with Visual C++ 2003.  I
> only have Visual C++ 2005 on my machine and am unable to find a download
> of 2003 on the Microsoft site (no big surprise).  I have never built
> Python from source.  Is it necessary or can someone suggest an alternative?
>
> TIA
>
> david lees

Unless you are customizing Python (and you can accomplish a *lot*
without doing so), it is not necessary to build Python from source.
Download one of the pre-built Windows binaries and install it, or get
the Win Python distribution from ActiveState and install that.  Then
start writing your own Python demo scripts.

-- Paul



From deets at nospam.web.de  Mon Aug  6 09:26:49 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 06 Aug 2007 15:26:49 +0200
Subject: Scope question
References: <mailman.1670.1186405654.22759.python-list@python.org>
Message-ID: <5holspF3luclfU1@mid.uni-berlin.de>

Nitro wrote:

> Hello,
> 
> today I wrote this piece of code and I am wondering why it does not work
> the way I expect it to work. Here's the code:
> 
> y = 0
> def func():
>      y += 3
> func()
> 
> This gives an
> 
> UnboundLocalError: local variable 'y' referenced before assignment
> 
> If I change the function like this:
> 
> y = 0
> def func():
>      print y
> func()
> 
> then no error is thrown and python apparently knows about 'y'.
> 
> I don't understand why the error is thrown in the first place. Can
> somebody explain the rule which is causing the error to me?

The reason is that python's scoping rules have to somehow determine if a
variable is local to a function or part of the surrounding context.

Because python lacks variable declarations, what is does to infer the scope
of a variable is to check if it is part of the left-side of an assignment.

So in the first case, y is considered a func-local variable - which of
course you didn't initialize.

This behavior has been subject of quite a few critical discussions - yet you
have to live with it.



diez


From deets at nospam.web.de  Sun Aug 19 14:35:44 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 19 Aug 2007 20:35:44 +0200
Subject: ctypes and unsigned char*
In-Reply-To: <1187545486.797017.308720@a39g2000hsc.googlegroups.com>
References: <1187545486.797017.308720@a39g2000hsc.googlegroups.com>
Message-ID: <5irgsbF3oi5dpU1@mid.uni-berlin.de>

oliver.andrich at gmail.com schrieb:
> Hi,
> 
> can anybody with ctypes experience tell me, how to handle a C function
> that returns an unsigned char*? Obviously it is not a restype of
> c_char_p.

 From the docs:

c_ubyte

     Represents the C unsigned char datatype, it interprets the value as 
small integer. The constructor accepts an optional integer initializer; 
no overflow checking is done.



Diez


From steve at holdenweb.com  Thu Aug  9 18:10:43 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Aug 2007 18:10:43 -0400
Subject: Puzzled by "is"
In-Reply-To: <46BB7E08.4070809@wp.pl>
References: <20070809194105.39BD11E400A@bag.python.org>	<f9frbl$dps$1@sea.gmane.org>
	<46BB7E08.4070809@wp.pl>
Message-ID: <f9g3d0$8q8$1@sea.gmane.org>

Grzegorz S?odkowicz wrote:
>> Why? Because.
>>
>> Seriously, it's just an optimization by the implementers. There is no 
>> need for more than one empty tuple, since tuples can never be modified 
>> once created.
>>
>> But they decided not to create (1, ) in advance. They probably knew that 
>> hardly anybody would want to create that tuple ;-) [Seriously: if you 
>> started trying to predict which tuples would be used you would go 
>> insane, but the empty tuple is the most likely candidate].
>>   
> That's just theorisation but I'd rather expect the interpreter simply 
> not to create a second tuple while there already is an identical one. 
> This could save some memory if the tuple was large (Although by the same 
> token comparison of large tuples can be expensive). Admittedly the empty 
> tuple is a special case but then 'Special cases aren't special enough to 
> break the rules'.
> 
> A bit odd.
> 
It's a trade-off, preferring to optimize time rather than memory usage. 
If tuples were "interned" like some strings then tuple creation would be 
more expensive due to the need to search the cache when creating them 
which, as you rightly point out, could be very expensive for large tuples.

The integers under 100 are also, IIRC, special-cased:

 >>> x = 12
 >>> y = 32676
 >>> x is 12
True
 >>> y is 32676
False
 >>>

I guess if you *make* the rules you can decide when it's reasonable to 
break them!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bert.heymans at gmail.com  Mon Aug 20 17:59:47 2007
From: bert.heymans at gmail.com (Bert Heymans)
Date: Mon, 20 Aug 2007 21:59:47 -0000
Subject: Any advice on ways for sharing a small Python application with the
	world?
Message-ID: <1187647187.137812.158130@22g2000hsm.googlegroups.com>

Hi,

I made a Python cli application for resizing batches of images based
on the PIL. You can find it here http://heymans.org/pyresize.html

It's just an straight forward command line interface application but I
guess many people would find a use for it, it can be used as a module
as well. There's lots of comments in the code and a chunk of
documentation.

This post is a way to get the word out, I blogged about it (http://
blog.heymans.org) and submitted it to the Vaults of Parnassus (http://
py.vaults.ca/) does anyone know of other ways to share something that
might just be too small for a sourceforge project but too big to be a
snippet?

Thanks!

Cheers

Bert Heymans



From nih at nih.nildram.co.uk  Mon Aug 20 07:15:51 2007
From: nih at nih.nildram.co.uk (nih)
Date: Mon, 20 Aug 2007 12:15:51 +0100
Subject: building exe from script
References: <1187602337.366419.92930@r29g2000hsg.googlegroups.com>
Message-ID: <xemdnRK6kdB56lTbnZ2dnUVZ8q-rnZ2d@pipex.net>

A bit more information is clearly needed...

1. Create a file called py2exeSetup.py with the following contents:

from distutils.core import setup
import py2exe

def compile(appName, console=False):
    OPTIONS = {"py2exe": {"compressed": 1, "optimize": 0, "bundle_files": 
1, } }
    ZIPFILE = None

    if console:
        setup(
            options=OPTIONS,
            zipfile=ZIPFILE,
            console=[appName]
        )
    else:
        setup(
            options=OPTIONS,
            zipfile=ZIPFILE,
            windows=[appName]
        )


2. Create another file called setup.py with the following contents

import py2exeSetup

# to stop a wxPython program from loading a console window you just need to 
change the
# file extension from .py to .pyw

# change Filename to your XXXApp.pyw filename
# change to py2exeSetup.compile('Filename.pyw', console=True) to show the 
console
py2exeSetup.compile('Filename.pyw')


3. Create a file called Compile.bat with the following contents

REM change Filename to your XXXApp.exe filename
REM make sure that python is in your system path

python setup.py py2exe
copy dist\Filename.exe Filename.exe
if errorlevel 1 pause


4. Put all these files in the same place as the program you want to convert 
to exe and run Compile.bat
    an *.exe file will now be in the same folder as your python files :)

I have py2exeSetup.py in a separate 'Shared' folder so there is only one 
copy of it,
so all my programs only have setup.py and compile.bat in them


btw if you have a load of programs that you want to compile in one go the 
add a file CompileAll.bat
in the root folder that all the programs are in, with the following 
contents:

cd "ProgramOne"
call py2exe.bat
cd..

cd "ProgramTwo"
call py2exe.bat
cd..

# REM this part will execute if all programs compiled & copied ok
echo all copied ok!
pause


I know hardly anything about ms-dos, but this works ok:/

gl!

<vedrandekovic at v-programs.com> wrote in message 
news:1187602337.366419.92930 at r29g2000hsg.googlegroups.com...
> Hello,
>
> Is there any solution for building exe file from python script
> something like bbfreeze.When user write some script in
> my program, it must compile script into exe without opening console
> ( cmd ).I'am working on Windows XP  SP2 and Python 2.5.
>
>
>
> Regards,
> Vedran
> 




From joejacob21 at gmail.com  Mon Aug 13 07:16:48 2007
From: joejacob21 at gmail.com (joe jacob)
Date: Mon, 13 Aug 2007 11:16:48 -0000
Subject: Configuring apache to execute python scripts using mod_python handler
Message-ID: <1187003808.725705.56070@q3g2000prf.googlegroups.com>

I configured apache to execute python scripts using mod_python
handler. I followed below mentioned steps to configure apache.

1. In http.conf I added

  <Directory "D:/softwares/Apache2.2/htdocs">
  AddHandler mod_python .py
  PythonHandler mptest
  PythonDebug On
  </Directory>

2. Then I added the line "LoadModule python_module modules/
mod_python.so" to http.conf.

Then I tried execute the python script mentioned below from browser.

from mod_python import apache
def handler(req):
req.content_type = 'text/plain'
req.write("Hello World!")
return apache.OK

Then I am getting the following error

Traceback (most recent call last):

  File "D:\softwares\Python25\Lib\site-packages\mod_python
\importer.py", line 1537, in HandlerDispatch
    default=default_handler, arg=req, silent=hlist.silent)

  File "D:\softwares\Python25\Lib\site-packages\mod_python
\importer.py", line 1202, in _process_target
    module = import_module(module_name, path=path)

  File "D:\softwares\Python25\Lib\site-packages\mod_python
\importer.py", line 304, in import_module
    return __import__(module_name, {}, {}, ['*'])

ImportError: No module named mptest

I am using Apache 2.2.4, python 2.5 and mod_python-3.3.1.win32-py2.5-
Apache2.2.

I am able to execute python scripts by configuring apache to execute
the cgi scripts. But I want to execute it using mod_python as it is
faster compared to cgi mode. Someone please help me on this issue.



From zyzhu2000 at gmail.com  Wed Aug  1 13:59:30 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Wed, 01 Aug 2007 17:59:30 -0000
Subject: Assertion in list comprehension
In-Reply-To: <mailman.1446.1185989748.22759.python-list@python.org>
References: <1185982643.001546.138180@e16g2000pri.googlegroups.com>
	<mailman.1439.1185985738.22759.python-list@python.org>
	<1185988597.055293.106540@q3g2000prf.googlegroups.com>
	<mailman.1446.1185989748.22759.python-list@python.org>
Message-ID: <1185991170.993822.175970@z24g2000prh.googlegroups.com>

On Aug 1, 12:35 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/1/07, beginner <zyzhu2... at gmail.com> wrote:
>
>
>
>
>
> > On Aug 1, 11:28 am, "Chris Mellon" <arka... at gmail.com> wrote:
> > > On 8/1/07, beginner <zyzhu2... at gmail.com> wrote:
>
> > > > Hi,
>
> > > > Does anyone know how to put an assertion in list comprehension? I have
> > > > the following list comprehension, but I want to use an assertion to
> > > > check the contents of rec_stdl. I ended up using another loop which
> > > > essentially duplicates the functions of list comprehension. It just
> > > > look like a waste of coding and computer time to me.
>
> > > > I just wish I could put the assertions into list comprehensions.
>
> > > >         x=[(rec_stdl[0].st/10000.0,
> > > >             rec_stdl[0].cl,
> > > >             rec_stdl[0].bb,
> > > >             rec_stdl[0].bo,
> > > >             rec_stdl[1].bb,
> > > >             rec_stdl[1].bo,
> > > >             rec_stdl[0].ex
> > > >            )
> > > >            for rec_stdl in rec_by_ex if len(rec_stdl)==2
> > > >         ]
>
> > > >         #duplicated loop
> > > >         if __debug__:
> > > >             for rec_stdl in rec_by_ex:
> > > >                 l=len(rec_stdl)
> > > >                 assert(l<=2 and l>0)
> > > >                 if l==2:
> > > >                     assert(rec_stdl[0].c=="C" and rec_stdl[1].c=="P")
> > > >                     assert(rec_stdl[0].ex==rec_stdl[1].ex)
> > > >                     assert(rec_stdl[0].st==rec_stdl[1].st)
> > > >                     assert(rec_stdl[0].cp==rec_stdl[1].cp)
>
> > > First: All your asserts are wrong. Assert is a statement, not a
> > > function. These specific ones will behave as expected, but it's easy
> > > to accidentally write ones that always pass this way.
>
> > Do you mean I should not use the parentheses?
>
> Yes.
>
>
>
> > > Secondly: This is a waste of code, because if __debug__ is not defined
> > > asserts will be skipped by the compiler. You could use the same loop
> > > block for both branches.
>
> > I know. My original question was how. Dan suggested to write a checker
> > function.
>
> Use the second block in all cases. In any situation where "if
> __debug__" is False, the asserts are a noop and in fact won't even be
> present in the bytecode.
>
>
>
>
>
> > > Thirdly: This sort of testing is precisely what unit tests and/or
> > > doctests are for.
>
> > Agreed.
>
> > --
> >http://mail.python.org/mailman/listinfo/python-list- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

I see. In fact I want to whole block surrounded by __debug__ to be
optimized away in non-debug runs. If the logic of my program is
correct, the asserts are guaranteed to be true, no matter what the
input is. It is not input checking.



From zyzhu2000 at gmail.com  Sun Aug 19 12:35:42 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Sun, 19 Aug 2007 16:35:42 -0000
Subject: How to make a module function visible only inside the module?
In-Reply-To: <5iqsbtF3qanv6U3@mid.individual.net>
References: <1187484334.091530.90420@m37g2000prh.googlegroups.com>
	<1i32pg7.b0y3h92vjygwN%raims@dot.com>
	<1187488017.198905.242610@j4g2000prf.googlegroups.com>
	<5iqsbtF3qanv6U3@mid.individual.net>
Message-ID: <1187541342.251682.307350@i13g2000prf.googlegroups.com>

On Aug 19, 7:45 am, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> beginner wrote:
> > Thanks a lot. I was using two underscores, __module_method() as my
> > static method convention, and then I had some problems calling
> > them from inside class methods.
>
> *Please* do yourself and other people that sometime may have to read
> your code a favor and write code at least loosely oriented to
> PEP 8.
>
> BTW, Python has no "static methods" at module level. And I suppose
> what you call "class methods" actually aren't.
>
> Regards,
>
> Bj?rn
>
> --
> BOFH excuse #183:
>
> filesystem not big enough for Jumbo Kernel Patch

I just started learning the language. I wasn't aware of the PEP.



From bdesth.quelquechose at free.quelquepart.fr  Wed Aug  1 16:28:07 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 01 Aug 2007 22:28:07 +0200
Subject: Pythonic way for missing dict keys
In-Reply-To: <pan.2007.07.29.04.10.19.329342@REMOVE.THIS.cybersource.com.au>
References: <mailman.938.1184958565.22759.python-list@python.org>
	<pan.2007.07.21.00.20.54.768439@REMOVE.THIS.cybersource.com.au>
	<mailman.954.1184989959.22759.python-list@python.org>
	<Xns99748CC2DB4AAduncanbooth@127.0.0.1>
	<1185041243.323915.161230@x40g2000prg.googlegroups.com>
	<mailman.984.1185101740.22759.python-list@python.org>
	<87lkd0eprj.fsf@pobox.com>
	<mailman.1279.1185623588.22759.python-list@python.org>
	<pan.2007.07.29.04.10.19.329342@REMOVE.THIS.cybersource.com.au>
Message-ID: <46b0ed0b$0$2257$426a74cc@news.free.fr>

Steven D'Aprano a ?crit :
(snip)

> Instead of doing:
> 
> 
> if callable(function): function()
> 
> you should do:
> 
> try:
>     function()
> except TypeError:
>     pass

There are time where you may want to know if you have a callable without 
calling it...

> That should work for most uses of callable(), but isn't quite the same.
> (What if function() has side-effects, or is expensive, and you want to
> determine if it is callable, but not actually call it _now_?)

Indeed.

The 'correct' replacement would be:

if hasattr(obj, '__call__'):
   # it's a callable

but I don't find it so Pythonic to have to check for a __magic__ method.


>>Also, what is the replacement of reduce? I think I remember seeing
>>somewhere that lists comprehension would be (but also remember the
>>advise that reduce will be quicker).
> 
> 
> No, a list comprehension isn't equivalent to reduce(). There is no
> replacement for reduce().
> 
> Guido has essentially done the functional equivalent of deciding that
> because he personally doesn't like for loops, they can and should be
> written out as:
> 
> counter = 0
> while counter < len(sequence):
>     item = sequence[counter]
>     do_something_with_item
>     counter += 1
> 
> because it is "easier to read" than a for loop.
> 
> And yes, if you think my example is extreme because nobody would be that
> stupid, that's the point: removing reduce() _is_ that stupid (and it is
> not often I say that about a language design decision by Guido!). Python
> can, and probably will, get away with it only because reducing an iterable
> to a single value is an uncommon operation, and the most common uses of it
> (summing a sequence, finding the minimum and maximum) already have
> workable replacements.
> 
> It's especially stupid because map() and filter(), both of which do have
> simple, easy to understand, completely functional replacements, are going
> to stay. reduce() doesn't, and it is going. That's nuts.

InMyArms(TM) !

(Guido, if you read us...)


From enleverlesX.XmcX at XmclaveauX.com  Mon Aug 27 05:12:04 2007
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI (MVP))
Date: Mon, 27 Aug 2007 11:12:04 +0200
Subject: SCF released to GPL
References: <ZBnAi.21498$eY.43@newssvr13.news.prodigy.net>
Message-ID: <46d29a6c$0$27404$ba4acef3@news.orange.fr>

Salut !

Le deuxi?me envoi aurait pu ?tre en fran?ais.
Cela aurait ?vit? le doublon, tout en maintenant le message.

@+

Michel Claveau



From einarwh at notreal.com  Thu Aug 23 15:48:56 2007
From: einarwh at notreal.com (=?ISO-8859-1?Q?=22Einar_W=2E_H=F8st=22?=)
Date: Thu, 23 Aug 2007 21:48:56 +0200
Subject: Newbie: List file system roots
Message-ID: <VfmdnUadeYEpeVDb4p2dnAA@telenor.com>

Hi,

How would you list the file system roots in Python? That is, I'm looking
for a way to list all connected drives (C:, D: etc) on a Windows box, or
all /root, /tmp etc on a *nix box. In Java, there's a built-in API
function to do this, File.listRoots(), but I couldn't find any
equivalents in the Python libraries.

Kind regards,
Einar


From steve at holdenweb.com  Sun Aug 12 17:11:44 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Aug 2007 17:11:44 -0400
Subject: wxPython - drawing without paint event
In-Reply-To: <1186951326.218981.17820@b79g2000hse.googlegroups.com>
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>	<1186738813.373909.96230@x35g2000prf.googlegroups.com>	<1186796567.331348.42450@q3g2000prf.googlegroups.com>	<5i5l0dF2lortaU1@mid.individual.net>	<1186883988.585048.16590@m37g2000prh.googlegroups.com>	<5i8befF3o5no1U1@mid.individual.net>	<1186928595.014008.61950@b79g2000hse.googlegroups.com>	<5i98bsF3nmbavU1@mid.individual.net>
	<1186951326.218981.17820@b79g2000hse.googlegroups.com>
Message-ID: <f9nt2b$hgm$1@sea.gmane.org>

7stud wrote:
> On Aug 12, 2:20 pm, Bjoern Schliessmann <usenet-
> mail-0306.20.chr0n... at spamgourmet.com> wrote:
>> But any suggestions what's
>> better for a beginner? The (incomplete) tutorial surely not.
>>
> 
> Another GUI toolkit.
> 
> 
Well if all you have to offer is fatuous advice you would be helping 
people more by keeping quiet. wxPython is a more-than-adequate GUI 
toolkit, as has been proved in many successful projects.

What other toolkits have you used, and to what effect, and on what size 
of program? I suspect you are not particularly well-qualified to be 
answering this question in the first place, although as always you are 
entitled to your opinion. It's just that you appear to have an inflated 
value of its worth.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From orsenthil at gmail.com  Sat Aug  4 22:43:56 2007
From: orsenthil at gmail.com (Phoe6)
Date: Sun, 05 Aug 2007 02:43:56 -0000
Subject: Comparing RFC1123 based Dates
Message-ID: <1186281836.970400.103490@i13g2000prf.googlegroups.com>

I would like to parse RFC 1123 date format and compare two dates. I
find that
datetime module does not specifically confirms to any RFC. Any
suggestions as how I can handle the RFC 1123 date format using
standard libraries before I go to re based parsing?

Thanks,
Senthil



From seandavi at gmail.com  Thu Aug 23 22:00:25 2007
From: seandavi at gmail.com (Sean Davis)
Date: Fri, 24 Aug 2007 02:00:25 -0000
Subject: Making a file-like object for manipulating a large file
Message-ID: <1187920825.457886.7880@q4g2000prc.googlegroups.com>

This should be a relatively simple problem, but I haven't quite got
the idea of how to go about it.  I have a VERY large file that I would
like to load a line at a time, do some manipulations on it, and then
make it available to as a file-like object for use as input to a
database module (psycopg2) that wants a file-like object (with read
and readlines methods).  I could write the manipulated file out to
disk and then read it back in, but that seems wasteful.  So, it seems
like I need a buffer, a way to fill the buffer and a way to have read
and readlines use the buffer.  What I can't do is to load the ENTIRE
file into a stringio object, as the file is much too large.  Any
suggestions?

Thanks,
Sean



From kib2 at free.fr  Wed Aug 29 04:47:12 2007
From: kib2 at free.fr (tool69)
Date: Wed, 29 Aug 2007 10:47:12 +0200
Subject: encoding problems
In-Reply-To: <fb3au1$v9m$1@lust.ihug.co.nz>
References: <46d5215b$0$411$426a74cc@news.free.fr>
	<fb3au1$v9m$1@lust.ihug.co.nz>
Message-ID: <46d53391$0$14536$426a74cc@news.free.fr>

Lawrence D'Oliveiro a ?crit :
> In message <46d5215b$0$411$426a74cc at news.free.fr>, tool69 wrote:
> 
>> p2.content = """Ce poste poss?de des accents : ? ? ? ?"""
> 
> My guess is this is being encoded as a Latin-1 string, but when you try to
> output it it goes through the ASCII encoder, which doesn't understand the
> accents. Try this:
> 
> p2.content = u"""Ce poste poss?de des accents : ? ? ? ?""".encode("utf8")
> 

Thanks for your answer Lawrence, but I always got the error.
Any other idea ?



From mtobis at gmail.com  Sun Aug 19 10:43:50 2007
From: mtobis at gmail.com (Michael Tobis)
Date: Sun, 19 Aug 2007 14:43:50 -0000
Subject: Newbie question
In-Reply-To: <eoCdnQvZBMj_y1XbRVnysAA@bt.com>
References: <eoCdnQvZBMj_y1XbRVnysAA@bt.com>
Message-ID: <1187534630.279129.279930@d55g2000hsg.googlegroups.com>

http://diveintopython.org/

mt



From riteshsarraf at gmail.com  Sat Aug 11 23:18:02 2007
From: riteshsarraf at gmail.com (Ritesh Raj Sarraf)
Date: Sun, 12 Aug 2007 03:18:02 -0000
Subject: Module imports during object instantiation
In-Reply-To: <f9io6j$p80$1@daisy.noc.ucla.edu>
References: <mailman.1845.1186783217.22759.python-list@python.org>
	<f9io6j$p80$1@daisy.noc.ucla.edu>
Message-ID: <1186888682.860619.258610@19g2000hsx.googlegroups.com>

On Aug 11, 3:17 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> You do realize your import statement will only be called for nt and dos
> systems don't you?
>

Yes. I would like to load a Windows Python Module (which is, say a
specific implementation for Windows only) in such a condition where I
find that the platform is Dos/NT.

Loading it globally doesn't make sense because when from the same
class an object is created on a non-windows platfom, it would be
waste. It would either ImportError or else just load the module and
never use it.

As per my understanding __init__ is executed only once during object
creation. For such situations (that I've explained above), I think
__init__() is the correct place to put imports.

Ritesh



From rcdailey at gmail.com  Wed Aug  1 13:12:41 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Wed, 1 Aug 2007 12:12:41 -0500
Subject: Checking object types
Message-ID: <496954360708011012p20f2dd3cu74f0ff34deb5505f@mail.gmail.com>

Hi,

I'm currently interested in creating an __add__() operator for one of my
classes. This class handles both integers and objects its own type, however
I don't know how I can perform special add operations depending on which is
passed in. Since I haven't seen any evidence of function overloading, I'm
assuming I'll have to check the types of the variables passed in inside of
my __add__() method.

Take the two following examples:

vector3(3,4,2) + 5 = vector3(8,9,7)
vector3(3,2,1) + vector3(4,5,6) = vector3(7,7,7)

Any tips? Thanks.
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From ca.allen at gmail.com  Fri Aug  3 17:27:04 2007
From: ca.allen at gmail.com (Chris Allen)
Date: Fri, 03 Aug 2007 14:27:04 -0700
Subject: Global package variable, is it possible?
In-Reply-To: <46b39748$0$17945$4fafbaef@reader1.news.tin.it>
References: <1186160415.065108.139160@e9g2000prf.googlegroups.com>
	<46b36b31$0$10622$4fafbaef@reader2.news.tin.it>
	<mailman.1581.1186165038.22759.python-list@python.org>
	<46b39748$0$17945$4fafbaef@reader1.news.tin.it>
Message-ID: <1186176424.683344.49370@m37g2000prh.googlegroups.com>

> Only for knowing more about modules: is there a way to dinamically reload
> an already imported module?
>
> bye
> Fabio

Yeah you can reload modules with the reload builtin function.



From ttkk1024 at gmail.com  Mon Aug 27 07:47:47 2007
From: ttkk1024 at gmail.com (smalltalk)
Date: Mon, 27 Aug 2007 04:47:47 -0700
Subject: how setup a dll file as a module?
In-Reply-To: <5jfo9jF3tdo90U1@mid.uni-berlin.de>
References: <1188185095.421047.195770@q3g2000prf.googlegroups.com>
	<5jfo9jF3tdo90U1@mid.uni-berlin.de>
Message-ID: <1188215267.468717.240310@i13g2000prf.googlegroups.com>

On Aug 27, 6:45 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> smalltalk wrote:
>
> > in arcgis , arcgisscripting is a dll file
> > there is a script as following:
>
> > import  arcgisscripting
> > gp = arcgisscripting.create()
>
> > why can the script run?
> > how can we setup a dll file as a module?
>
> There can be python-extension that are essentially C-modules. You can write
> them your own, or using various wrapper technologies. See
>
> http://docs.python.org/ext/ext.html
>
> for starters, and google
>
> SIP
> boost::python
> SWIG
> PyRex
>
> for more information.
>
> Diez

thank you very much



From steve at holdenweb.com  Wed Aug 22 00:28:46 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 22 Aug 2007 00:28:46 -0400
Subject: File Read Cache - How to purge?
In-Reply-To: <87ir781afk.fsf@mulj.homelinux.net>
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>	<87veb9xb7y.fsf@mulj.homelinux.net>	<slrnfcm1hv.4r1.nick@irishsea.home.craig-wood.com>
	<87ir781afk.fsf@mulj.homelinux.net>
Message-ID: <fage1m$gpb$1@sea.gmane.org>

Hrvoje Niksic wrote:
> Nick Craig-Wood <nick at craig-wood.com> writes:
> 
>> If you are running linux > 2.6.18 then you can use
>> /proc/sys/vm/drop_caches for exactly that purpose.
>>
>>   http://www.linuxinsight.com/proc_sys_vm_drop_caches.html
> 
> That URL claims that you need to run "sync" before dropping the cache,
> and so do other resources.  I wonder if that means that dropping the
> cache is unsafe on a running system.

Good grief. Just let the operating system do its job, for Pete's sake, 
and go find something else to obsess about.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From rcdailey at gmail.com  Fri Aug 24 13:35:20 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Fri, 24 Aug 2007 12:35:20 -0500
Subject: optparse - required options
In-Reply-To: <z92dnfwLKf9z1FPbnZ2dnUVZ_oesnZ2d@comcast.com>
References: <496954360708201251r137dfaedqe632361891eae343@mail.gmail.com>
	<46C9F7D1.9040506@jayloden.com>
	<496954360708201353v19ea266cr50f144d1d71d5912@mail.gmail.com>
	<46CA0814.6050200@jayloden.com>
	<mailman.181.1187886467.32294.python-list@python.org>
	<z92dnfwLKf9z1FPbnZ2dnUVZ_oesnZ2d@comcast.com>
Message-ID: <496954360708241035r3956c106l169e58aa16847695@mail.gmail.com>

Thank you VERY much for mentioning argparse- this is EXACTLY what I needed!
Thank you!

On 8/23/07, Steven Bethard <steven.bethard at gmail.com> wrote:
>
> Omari Norman wrote:
> > On Mon, Aug 20, 2007 at 05:31:00PM -0400, Jay Loden wrote:
> >> Robert Dailey wrote:
> >>> Well, I don't know what is wrong with people then. I don't see how
> >>> required arguments are of bad design.
> >
> >> I tend to agree...while "required option" may be an oxymoron in
> >> English, I can think of quite a few scripts I've written myself (in
> >> various languages) that needed at least some kind of user input to
> >> operate.
> >
> > The idea with optparse is not that programs should not require certain
> > information on the command line; rather, the idea is that this
> > information should be positional arguments, not 'options'.
> >
> > That is, to use the compiler example:
> >
> > compiler file
> >
> > is preferred if a file argument is necessary.
> >
> > compiler --file file
> >
> > is not preferred.
>
> I agree with the optparse philosophy, but Practicality Beats Purity.
> That's why I was convinced to add "required options" to argparse --
> there are too many applications that want that kind of interface.
> *I* don't write applications with interfaces like that, but enough
> people do that the use case should really be supported.
>
> STeVe
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From nick at craig-wood.com  Tue Aug 21 12:30:08 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 21 Aug 2007 11:30:08 -0500
Subject: File Read Cache - How to purge?
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
	<87veb9xb7y.fsf@mulj.homelinux.net>
Message-ID: <slrnfcm1hv.4r1.nick@irishsea.home.craig-wood.com>

Hrvoje Niksic <hniksic at xemacs.org> wrote:
>  Signal <mugi at pinesalad.net> writes:
> 
> > 2. Is there anyway to somehow to take advantage of this "caching" by
> > initializing it without reading through the entire file first?
> >
> > 3. If the answer to #2 is No, then is there a way to purge this
> > "cache" in order to get a more accurate result in my routine?  That
> > is without having to read another large file first?
> 
>  On a Unix system the standard way to purge the cache is to unmount the
>  file system and remount it.

If you are running linux > 2.6.18 then you can use
/proc/sys/vm/drop_caches for exactly that purpose.

  http://www.linuxinsight.com/proc_sys_vm_drop_caches.html

Eg

# free
             total       used       free     shared    buffers     cached
Mem:       1036396     954404      81992          0      33536     347384
# echo 1 > /proc/sys/vm/drop_caches
# free
             total       used       free     shared    buffers     cached
Mem:       1036396     658604     377792          0        348      91240
# echo 2 > /proc/sys/vm/drop_caches
# free
             total       used       free     shared    buffers     cached
Mem:       1036396     587296     449100          0        392      91284
# echo 3 > /proc/sys/vm/drop_caches
# free
             total       used       free     shared    buffers     cached
Mem:       1036396     588228     448168          0        692      91808

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


From kyosohma at gmail.com  Wed Aug 29 14:56:41 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 29 Aug 2007 11:56:41 -0700
Subject: copying files
In-Reply-To: <mailman.113.1188413470.28954.python-list@python.org>
References: <93066C069973ED448DC2BCEA9C44A7383BE30C@efmailx>
	<mailman.113.1188413470.28954.python-list@python.org>
Message-ID: <1188413801.904992.292690@w3g2000hsg.googlegroups.com>

On Aug 29, 1:51 pm, Ricardo Ar?oz <ricar... at gmail.com> wrote:
> Brian McCann wrote:
> > Hi,
>
> > with the code below I set a variable TEST_HOME to a path and the
> > variable m to a path
> > in my current dir.
> > I have a symbolic link setting m---->lib
> > when I run the script I get no errors and the lib dir with its 20 files
> > does not get copied to /v01/test_home
> > any help would be greatly appreciated
>
> > --Brian
>
> > #!/usr/bin/python
> > import string
> > import os
> > import sys
> > import errno
> > import shutil
> > import tarfile
>
> > TEST_HOME = "/v01/test_home"
> > m = "./lib"
> > os.system("cp -r m TEST_HOME")
> > #os.system("tar -cvf viziant-ingestion.tar /v01/")
>
> Sorry, meant : os.system("cp -r " + m + " " + TEST_HOME)

Did you try using the shutil module?

Mike



From stefan at 3niemann.de  Tue Aug 28 18:00:49 2007
From: stefan at 3niemann.de (Stefan Niemann)
Date: Wed, 29 Aug 2007 00:00:49 +0200
Subject: Haskell like (c:cs) syntax
Message-ID: <fb25uh$gl9$1@online.de>

Hi,

sorry that I'm relatively new to Python. But the syntax and semantics of 
Python already fascinate me, because I'm familiar with functional languages 
like Haskell.

Is there a pattern matching construct in Python like (head : tail), meaning 
'head' matches the first element of a list and 'tail' matches the rest? I 
could not find this in the Python documentation.

Regards,
Stefan





From sickcodemonkey at gmail.com  Fri Aug 24 16:06:14 2007
From: sickcodemonkey at gmail.com (Sick Monkey)
Date: Fri, 24 Aug 2007 16:06:14 -0400
Subject: POP3 - Saving an image attachment only.
Message-ID: <2adc542f0708241306l7105c80kbbdc26ad3ea4c8f1@mail.gmail.com>

I wrote some code below (Code1 block) which will read a pop3 email account
and will open each email in the inbox.
What I want my code to do is only pull the attachment; as you see below I
basically output everything.  Is there an easy way to just pull
attachments?  (NOTE, the only attachements that I want to pull are images)
===========================================================
I also tried this, but for some reason the part.get_filename Always equal
"None"

 msg = email.message_from_string(mstring)
 for part in msg.walk():
    fn = part.get_filename()
    if fn <>None:
       filenames.append(fn)
       attachedcontents.append(part.get_payload())
       print "im here"


*..::CODE1:..
===========================================================*
for email in items:
  id, size = string.split(email)
  resp, text, octets = server.retr(id)
  text = string.join(text, "\n")
  file = StringIO.StringIO(text)
  message = rfc822.Message(file)
  print message.fp.read()

*..::OUTPUT1::..
===========================================================*
--__CONTENT_64564_PART_BOUNDARY__33243242__
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable
X-MIME-Autoconverted: from 8bit to quoted-printable by
njbrmotmta9.vzwpix.com id l7LIT1GZ008951

Some email text

--__CONTENT_64564_PART_BOUNDARY__33243242__
Content-Type: image/jpeg;
 name="0815071408.jpg"
Content-ID: <0815071408.jpg>
Content-Location: 0815071408.jpg
Content-Transfer-Encoding: base64

/9j/4AkjSkZYWAAQ/9j/2wCEABALDA4MChAODQ4SERATGCgaGBYWGDEjJR0oOjM9PDkzODdA
SFxOQERXRTc4UG1RV19iZ2hnPk1xeXBkeFxlZ2MBERISGBUYLxoaL2NCOEJjY2NjY2NjY2Nj
Y2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY//EAaIAAAEFAQEBAQEB
AAAAAAAAAAABAgMEBQYHCAkKCxAAAgEDAwIEAwUFBAQAAAF9AQIDAAQRBRIhMUEGE1FhByJx
FDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3ODk6Q0RFRkdISUpTVFVWV1hZ
WmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWmp6ipqrKztLW2t7i5usLD
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From bj_666 at gmx.net  Fri Aug 31 09:58:51 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 31 Aug 2007 13:58:51 GMT
Subject: reload(sys)
References: <1188521143.421431.119100@l22g2000prc.googlegroups.com>
	<JK2dnSgydPkg8ErbnZ2dnUVZ_u3inZ2d@comcast.com>
	<1188564816.430863.219560@w3g2000hsg.googlegroups.com>
Message-ID: <5jql4rFh543U4@mid.uni-berlin.de>

On Fri, 31 Aug 2007 12:53:36 +0000, S?nmez Kartal wrote:

> On 31 A ustos, 04:24, Steven Bethard <steven.beth... at gmail.com> wrote:
>> Snmez Kartal wrote:
>> > I've had an encoding issue and solved it by
>> > "sys.setdefaultencoding('utf-8')"...
>>
>> > My first try wasn't successful since setdefaultencoding is not named
>> > when I imported sys module. After, I import sys module, I needed to
>> > write "reload(sys)" also.
>>
>> > I wonder why we need to call "reload(sys)" to get setdefaultencoding
>> > named?
>>
>> sys.setdefaultencoding is purposely deleted from the sys module after
>> it's loaded because you really shouldn't be using it. The reload() call
>> restores the deleted attribute.
>>
>> If you'd like a less brittle solution to your encoding issue, explain
>> what the issue was, and people here can probably help you find a better
>> solution.
> 
> I was using the XMLBuilder(xmlbuilder.py). I'm writing XML files as
> "f.write(str(xml))". At execution of that line, it gives error with
> description, configure your default encoding...

This doesn't help us that much.  What is `f` here and what is `xml`?

> This is the part of xmlbuilder.py which raises the error.
> 
>         try:
>             if self.pretty:
>                 # tabs are evil, so we will use two spaces
>                 outstr = self._dom.toprettyxml("
> ",encoding=self.encoding)
>             else:
>                 outstr = self._dom.toxml(encoding=self.encoding)
>         except UnicodeDecodeError:
>             sys.stderr.write('Decoding Error: You must configure
> default encoding\n')
>             sys.exit()

So there is an attribute `self.encoding` on that object.  Is it set?  What
encoding is it?  And do you put byte strings with values outside ASCII
into your XML or unicode strings?

Ciao,
	Marc 'BlackJack' Rintsch


From duprez at hinet.net.au  Mon Aug 27 20:20:57 2007
From: duprez at hinet.net.au (Mick Duprez)
Date: Mon, 27 Aug 2007 17:20:57 -0700
Subject: Error with Simplemapi.py
In-Reply-To: <mailman.17.1188197186.28954.python-list@python.org>
References: <1187938985.165186.300780@i38g2000prf.googlegroups.com>
	<mailman.14.1188187230.28954.python-list@python.org>
	<1188194730.024877.120880@q5g2000prf.googlegroups.com>
	<mailman.17.1188197186.28954.python-list@python.org>
Message-ID: <1188260457.269412.13350@q3g2000prf.googlegroups.com>

On Aug 27, 4:46 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 27 Aug 2007 03:05:30 -0300, Mick Duprez <dup... at hinet.net.au>
> escribi?:
>
> > Thank you very much Gabriel, changing the NULL to None did the trick
> > (it also helps if I reload the changed module after editing!:( ).
>
> Glad to see it worked.
>
> > Yes
> > that is an old script and I will look into your suggestions. Basically
> > I'd just like to use the default mail client (windows or Unix/Linux)
> > to send simple mail with attachments, this way I can log the
> > attachments I send to a db for example for document transmittal/
> > register reports etc.
>
> Hmmm... altough you may find some MAPI implementation for Linux, it's very
> uncommon; consider using sendmail instead, or ask for an outbound SMTP
> server and use the smtplib module.
>
> --
> Gabriel Genellina

Will do, thanks for your time,
Mick.



From johnmasters at oxtedonline.net  Mon Aug 13 16:54:30 2007
From: johnmasters at oxtedonline.net (John K Masters)
Date: Mon, 13 Aug 2007 21:54:30 +0100
Subject: negative polar axis
In-Reply-To: <puednd-H8IReBl3bnZ2dnUVZ_s7inZ2d@speakeasy.net>
References: <1186999666.642856.16820@19g2000hsx.googlegroups.com>
	<mailman.1918.1187013003.22759.python-list@python.org>
	<puednd-H8IReBl3bnZ2dnUVZ_s7inZ2d@speakeasy.net>
Message-ID: <20070813205430.GA3865@spookie1.spookiegate>

On 10:58 Mon 13 Aug     , Erik Max Francis wrote:
> Steve Holden wrote:
> 
> > About the best interpretation I can think of is to add 180 degrees to 
> > the angle and reverse the sign of the magnitude, but this would be a 
> > hack. Where are those coordinates coming from?
> 
> Well, sometimes in polar coordinates (r, theta), r is allowed to be 
> negative.  The usual translation from polar to Cartesian coordinates 
> makes this meaningful, albeit weird, so in effect the resulting 
> positions are just reflections around the origin.
> 
> Which I suppose is what the original poster was asking about, but it's 
> still not clear.
> 

Many years ago when I started programming machine tools (on punched
paper tape) if you wished to specify a cutter path around a radius as
being more than 180 degrees you programmed it as a negative r value.
There are 2 possible paths from x1y1 to x2y2 along a radius r and going
in the same direction; that less than 180 deg and that more than 180
deg, unless the radius is exactly 180. But this was rarely used, the
other method of specifying the end point as an incremental value in
relation to the radius centre is less error prone when the arcs are
close to 180.

Sorry about the slight diversion but I'm getting nostalgic.

Regards, John
-- 
War is God's way of teaching Americans geography
Ambrose Bierce (1842 - 1914)


From musiccomposition at gmail.com  Tue Aug 21 11:21:51 2007
From: musiccomposition at gmail.com (Benjamin)
Date: Tue, 21 Aug 2007 15:21:51 -0000
Subject: IDE for Python
In-Reply-To: <mailman.55.1187690455.32294.python-list@python.org>
References: <mailman.55.1187690455.32294.python-list@python.org>
Message-ID: <1187709711.175483.86780@x35g2000prf.googlegroups.com>

On Aug 21, 5:00 am, Joel Andres Granados <joel.grana... at gmail.com>
wrote:
> Hello list:
>
> I have tried various times to use an IDE for python put have always been
> disapointed.
> I haven't revisited the idea in about a year and was wondering what the
> python people
> use.
> I have also foundhttp://pida.co.uk/mainas a possible solution.  Anyone
> tried it yet?
>
> suggestions.
I like PyDev + Eclipse mostly because I develop Java, PHP, and C/C++,
so I like having a consistent interface between the languages.
Besides, the Eclipse updater makes updating and installing new
features really easy.
> Regards
> Joel Andres Granados
>
>  joel.granados.vcf
> 1KDownload




From hancock.robert at gmail.com  Tue Aug 14 08:24:11 2007
From: hancock.robert at gmail.com (milan_sanremo)
Date: Tue, 14 Aug 2007 12:24:11 -0000
Subject: chmod g+ Equivalent
In-Reply-To: <mailman.1946.1187053563.22759.python-list@python.org>
References: <1187042290.821786.178420@19g2000hsx.googlegroups.com>
	<mailman.1946.1187053563.22759.python-list@python.org>
Message-ID: <1187094251.540591.308320@g4g2000hsf.googlegroups.com>

On Aug 13, 8:06 pm, Steve Holden <st... at holdenweb.com> wrote:
> milan_sanremo wrote:
> > I've read the documentation on os.chmod() and can implement all the
> > standard commands, but what is the syntax for the equivalent of chmod g
> > + to set the group id?
>
> I assume when you say "to set the group id" you actually mean "to assert
> the setgid bit"? I further presume that when you say "chmod g+" you
> actually mean "chmod g+s".

The g+s was an omission on my part.  I can see how it would confuse
the issue.

I'm not sure if I mean "to assert the setgid bit".  My SUN docs refer
to it being 'on'.
http://docs.sun.com/app/docs/doc/819-3321/6n5i4b767?l=en&a=view&q=setgid+bit

>
> You can't have read the documentation very thoroughly. It says right at
> the top:
>
> S_ISUID
> S_ISGID

I did see this in the documentation:

Change the mode of path to the numeric mode. mode may take one of the
following values (as defined in the stat module) or bitwise or-ed
combinations of them:

    * S_ISUID
    * S_ISGID

Which refers to:
http://docs.python.org/lib/module-stat.html

After which it was still unclear.

My question is in the command os.chmod(myDirectory, ?) what is the
value for ? to turn on the setgid bit.

Contrary to your presumption, I did read the documentation
thoroughly.  It is inability to understand the concept which prompted
me to post the question here.

>
> Of course, your process needs to have root privilege in order to be able
> to do that.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------




From bignose+hates-spam at benfinney.id.au  Wed Aug  1 04:33:11 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 01 Aug 2007 18:33:11 +1000
Subject: Python end of file marker similar to perl's __END__
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
Message-ID: <87ir7zd588.fsf@benfinney.id.au>

beginner <zyzhu2000 at gmail.com> writes:

> In perl, I can write __END__ in a file and the perl interpreter will
> ignore everything below that line.

IIRC, this Perl feature is specifically intended to work with its
feature of reading data from the same file, as all the lines following
that marker.

> This is very handy when testing my program.

If my understanding above is correct, then your use of it is a happy
repurposing of the feature, and not an intended use.

> Does python have something similar?

Since it doesn't have the behaviour that inspired that feature in
Perl, I doubt it.

-- 
 \                          "Everything is futile."  -- Marvin of Borg |
  `\                                                                   |
_o__)                                                                  |
Ben Finney


From S.Mientki-nospam at mailbox.kun.nl  Mon Aug  6 13:51:26 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Mon, 06 Aug 2007 19:51:26 +0200
Subject: is it possible to improve traceback messages ?
Message-ID: <46B75F9E.5020309@mailbox.kun.nl>

hello,

Most of time I get an error message, it is sufficient to solve to problem.
Sometimes it's not clear to me what the problem is
like this one:

     N = int (log10(self.Value)) + 1
TypeError: int() argument must be a string or a number

In order to solve it, in general I put some print statements,
before the line with the problem,
printing values and types of all variables.

I think it would be much more convenient,
if the traceback or error exception ( don't know how it works exactly),
would print the type and value of all variables and constants used in the last line.

Can this be done (in a easy way).

thanks,
Stef Mientki


From dstromberg at datallegro.com  Wed Aug 29 19:17:35 2007
From: dstromberg at datallegro.com (Dan Stromberg - Datallegro)
Date: Wed, 29 Aug 2007 23:17:35 GMT
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
Message-ID: <pan.2007.08.29.23.17.34.304019@datallegro.com>

On Tue, 28 Aug 2007 23:45:28 -0700, Russ wrote:

> On Aug 28, 10:58 pm, Michele Simionato <michele.simion... at gmail.com>
> wrote:
> 
>> Why do you think that would ad a strong positive capability?
>> To me at least it seems a big fat lot of over-engineering, not
>> needed in 99% of programs. In the remaining 1%, it would still not
>> be needed since Python provides out of the box very powerful
>> metaprogramming capabilities so that you can implement
>> yourself the checks you need, if you really need them.
> 
> I get the strong impression you don't really understand what
> programming by contract is.
> 
> I have not yet personally used it, but I am interested in anything
> that can help to make my programs more reliable. If you are
> programming something that doesn't really need to be correct, than you
> probably don't need it. But if you really need (or want) your software
> to be correct and reliable as possible, I think you you should be
> interested in it. You might want to read this:
> 
> http://archive.eiffel.com/doc/manuals/technology/contract/ariane/page.html

I agree with Chris - there's no need to be condescending.

However, I agree with you that this is a valuable addition to a language.

It's not that Eiffel, by having preconditions and postconditions, is doing
anything that cannot be done in python already.

It's more that by making these things a formal part of the language, or at
least a module that facilitates them, one gives a sort of stamp of
approval to adding a ton of assertions about how your code is supposed to
work /when/working/in/that/language, which makes debugging a relative
snap.  Isn't that something people should want for python?  Sturdy code
and easy debugging?

I've been trying to write my python code with tons of "unnecessary" if
statements that check out my assumptions, and I'm finding more or less
what the Eiffel people claim: I'm investing a little bit of upfront time,
and getting a huge payoff in the backend as my code starts to debug
itself.  But I likely never would've started taking my error checking to
such extremes if I hadn't been curious about Eiffel for a while.

Throwing in tons of error and assumption checking mostly eliminates silly
tracing from procedure to function to procedure to function, trying to
find the ultimate root cause of a problem.  Usually, the root cause is
identified in an error on stderr or similar.

Keep in mind that debugging usually takes far longer than the initial
coding.  Programming by contract seems to balance that out, relatively
speaking.

Granted, we could just say "You should check for these things anyway", or
"You should know what you're doing", but...  Isn't that kind of what
assembler programmers used to say to Lisp, FORTRAN and COBOL programmers? 

And what about the case where you've written a piece of code, and
someone else has written another, and the two pieces of code need to
interact?  Odds are pretty good that if this code has much substance,
there'll be opportunity for subtly different assumptions about what should
be happening in each (yes, "well abstracted" code will be
misassumption-resistant, but even the best OOP programmers will run afoul
of this /sometimes/). Perhaps both these programmers "Know what they're
doing", but they don't necessarily know what the other is doing!

IMO, putting Programming by Contract into python as part of the language
itself, or as a simple module, is a little bit like a company or
department coming up with a mission statement.  It's easy to say that it's
meaningless, and some will ignore it, but it still kind of sets the tone
for how things "should be done".




From has.temp3 at virgin.net  Sun Aug  5 05:31:45 2007
From: has.temp3 at virgin.net (has)
Date: Sun, 05 Aug 2007 02:31:45 -0700
Subject: xlrd question
In-Reply-To: <mailman.1596.1186188547.22759.python-list@python.org>
References: <mailman.1596.1186188547.22759.python-list@python.org>
Message-ID: <1186306305.693234.266390@w3g2000hsg.googlegroups.com>

On Aug 4, 1:48 am, JYOUN... at kc.rr.com wrote:

> I ran your code which gave me this:
>
> >>> import sys, xlrd; print sys.version; print xlrd.__file__
>
> 2.3.5 (#1, Jan 30 2006, 13:30:29)
> [GCC 3.3 20030304 (Apple Computer, Inc. build 1819)]
> /System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site -packages/
> xlrd/__init__.pyc

Note that:

/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/
site-packages

is actually just a symlink to:

/Library/Python/2.3/site-packages

While third-party modules do usually go in python2.x/site-packages,
Apple don't like users messing about in /System so their stock Python
installation keeps third-party modules under /Library instead.

The exact location varies depending on OS version: on 10.3 it's /
Library/Python/2.3; on 10.4 it's /Library/Python/2.3/site-packages.
Modules installed via DistUtils/EasyInstall will be placed in the
appropriate location automatically.

For more information on installing DistUtils packages, see:

http://docs.python.org/inst/inst.html


> and as far as I can tell, the runxlrd.py file is located here (where I had drug this folder
> originally):
>
> Macintosh HD/xlrd-0.6.1/scripts/runxlrd.py

Nope,  DistUtils will copy all modules to site-packages as part of the
installation procedure. If you're a developer you'll probably want to
keep the original distribution around as it'll contain documentation,
examples, etc. which you'll want to refer to when writing your own
scripts. End-users of your scripts won't need it though.

([OT] Tip: dumping user files under / is poor etiquette; that's what
your home directory under /Users is for.)


> While I'm talking about Excel, is there any other program (for Python) that can edit Excel files?

You can script Excel directly from Python via appscript which talks to
scriptable Mac apps via the same API as AppleScript:

http://appscript.sourceforge.net

I don't do any Excel scripting myself, but Matt Neuburg includes a
nice example in this article on the Ruby version of appscript (which
has a similar syntax):

http://www.oreillynet.com/pub/a/mac/2007/02/27/replacing-applescript-with-ruby.html

If you need more info just ask.

HTH

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



From bignose+hates-spam at benfinney.id.au  Sat Aug  4 10:10:00 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 05 Aug 2007 00:10:00 +1000
Subject: Relative-importing *
References: <1185559874.299008.167010@x40g2000prg.googlegroups.com>
	<871weth2gg.fsf@benfinney.id.au>
	<pan.2007.07.28.06.17.39.399342@REMOVE.THIS.cybersource.com.au>
	<46ae3894$0$19609$426a34cc@news.free.fr>
	<1186200218.666444.254200@q3g2000prf.googlegroups.com>
Message-ID: <87vebv9yrr.fsf@benfinney.id.au>

rbygscrsepda at gmail.com writes:

> Yes, I'm importing * for a reason, a good one, I think.

Reading your description, I must say I don't see a good reason.

> I have a set of modules (the number planned to reach about 400) that
> would be dynamically loaded by my program as needed, and they're
> somewhat similar to each other. I wish each of them to import * from
> a certain "parent" module, so that they'll receive whatever
> functions and variables I want all of them to share (using the
> parent module's __all__), which may be overrided by the "child"
> modules at their discretion. Sort of like class inheritance, but I'm
> not doing that because implementing that would be a lot more tedious
> and less elegant.

It seems to me, based only on this description, that class inheritance
would be far *more* elegant, and much easier to follow when reading
the code.

If all these functions and other objects are so closely-related that
they form the core of some inheritance-like system, what's so
inelegant about wrapping them in a class so that the inheritance is
explicit in the module where it happens?

-- 
 \          "The only tyrant I accept in this world is the still voice |
  `\                                       within."  -- Mahatma Gandhi |
_o__)                                                                  |
Ben Finney


From ldo at geek-central.gen.new_zealand  Sun Aug 26 05:55:37 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 26 Aug 2007 21:55:37 +1200
Subject: Making a file-like object for manipulating a large file
References: <1187920825.457886.7880@q4g2000prc.googlegroups.com>
Message-ID: <farii5$2vs$1@lust.ihug.co.nz>

In message <1187920825.457886.7880 at q4g2000prc.googlegroups.com>, Sean Davis
wrote:

> I have a VERY large file that I would
> like to load a line at a time, do some manipulations on it, and then
> make it available to as a file-like object for use as input to a
> database module (psycopg2) that wants a file-like object (with read
> and readlines methods).  I could write the manipulated file out to
> disk and then read it back in, but that seems wasteful.

If your consumer doesn't need to seek, how about having it read from a pipe?


From frikker at gmail.com  Wed Aug 15 11:11:40 2007
From: frikker at gmail.com (frikk)
Date: Wed, 15 Aug 2007 08:11:40 -0700
Subject: Python, Sharepoint, .NET, NTLM
Message-ID: <1187190700.127033.98060@19g2000hsx.googlegroups.com>

Hey everyone,
  I need to authenticate with a Sharepoint server. It looks to be
using 'NTLM' authentication.  I've looked on the newsgroup and it
looks like there has been talk of using python and NTLM but no
definite solutions are apparent.

  Can anyone provide me with any kind of help on this issue? URLLIB2
keeps getting a 401 error when I try any kind of authentication.

I am trying to use python here in my company (for obvious reasons -
python is awesome!) and this is the first major project that would use
it.  Unfortunately if I cannot talk to Sharepoint (I am just trying to
get a list of .xml files and data from a form library) I cannot use
python.


 The other solution would be: Does anyone know how to get xml files
from a sharepoint library in python?  The worst case would be using
another language to compile just the xml file downloader.  This is not
the optimal solution.

Thank you,
Blaine



From zyzhu2000 at gmail.com  Sat Aug 18 20:49:19 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Sun, 19 Aug 2007 00:49:19 -0000
Subject: "constructor" or initialization function for module
Message-ID: <1187484559.935316.125050@j4g2000prf.googlegroups.com>

Hi Everyone,

An extended module (.pyd) written in C have an init function that is
called when the module is imported. Does anyone know if there is a way
to provide an init function for a module written in python?

Thanks,
Geoffrey



From stef.mientki at gmail.com  Tue Aug 14 08:39:26 2007
From: stef.mientki at gmail.com (stef mientki)
Date: Tue, 14 Aug 2007 14:39:26 +0200
Subject: LEGB rule, totally confused ...
Message-ID: <46C1A27E.1080206@gmail.com>

hello,

I've thought many times I finally understood the import / namespace rules,
but again I'm totally lost :-(

This is my library file

    # Module lib_test.py

    X = 1

    def Init():
        global X
        X = 3
        print 'Init', X

    def Run ():
        print X                 <=== UnboundLocalError: local variable
    'X' referenced before assignment
        X = X + 1
        print ' Run', X



And this my main program in another file:

    import lib_test
    lib_test.Init()
    print lib_test.X

    lib_test.Run()
    print lib_test.X

Why do I get the error ?
Printing isn't assigning anything or am I missing something.
Now if I remove "X = X + 1" I don't get an error ???
Is this a problem of the traceback procedure or the IDE,
or is Python not completely an interpreter, that reads line by line ???

Please explain this to me.

thanks,
Stef Mientki




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug 30 03:42:04 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 30 Aug 2007 09:42:04 +0200
Subject: list index()
In-Reply-To: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
Message-ID: <46d674c2$0$417$426a34cc@news.free.fr>

zzbbaadd at aol.com a ?crit :
> What's with the index() function of lists throwing an exception on not
> found? Let's hope this is rectified in Python 3. If nothing else, add
> a function that doesn't throw an exception. There are a million
> situations where you can have an item not be in a list and it is not
> an exception situation.

What's with using your brain instead of whining ?



From gperumal at gmail.com  Mon Aug 20 04:02:16 2007
From: gperumal at gmail.com (gperumal at gmail.com)
Date: Mon, 20 Aug 2007 01:02:16 -0700
Subject: Where we need to use Python ?
Message-ID: <1187596936.136499.200280@l22g2000prc.googlegroups.com>

Hi

Iam new to Python
I know Perl, JScript,C,C++,Java
But i want to know where excatly this python come in to picture

And Is it a interpreted language or a programming language
It comes in which category

I very keen to know this please tell

Regards
Ganesh P



From kyosohma at gmail.com  Fri Aug 24 15:40:50 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 24 Aug 2007 12:40:50 -0700
Subject: How to replace a method in an instance.
In-Reply-To: <46cf2ba2$0$30562$426a74cc@news.free.fr>
References: <mailman.258.1187971369.32294.python-list@python.org>
	<1187971953.261328.219000@q3g2000prf.googlegroups.com>
	<46cf2ba2$0$30562$426a74cc@news.free.fr>
Message-ID: <1187984450.138147.62780@e9g2000prf.googlegroups.com>

On Aug 22, 12:48 am, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> kyoso... at gmail.com a ?crit :
>
>
>
> > On Aug 24, 11:02 am, "Steven W. Orr" <ste... at syslang.net> wrote:
>
> >>In the program below, I want this instance to end up calling repmeth
> >>whenever inst.m1 is called. As it is now, I get this error:
>
> >>Hello from init
> >>inst =  <__main__.CC instance at 0x402105ec>
> >>Traceback (most recent call last):
> >>   File "./foo9.py", line 17, in ?
> >>     inst.m1()
> >>TypeError: repmeth() takes exactly 1 argument (0 given)
>
> >>#! /usr/bin/python
> >>def repmeth( self ):
> >>     print "repmeth"
>
> >>class CC:
> >>     def __init__( self ):
> >>         self.m1 = repmeth
> >>         print 'Hello from init'
>
> >>     def m1 ( self ):
> >>         print "m1"
>
> >>inst = CC()
> >>inst.m1()
>
> >>TIA
>
> > Remove "self" from repmeth as it's not required in a function, only in
> > functions that are defined within a class.
>
> Obviously wrong. 'self' (or whatever-you-name-it) as first arg is
> mandatory for functions used as instance methods. The fact that a
> function is defined outside a class doesn't mean it cannot be used as a
> method...
>
> > Of course, a function in a
> > class is also know as a method.
>
> Less obvious but still wrong !-)


I wish the authors of the Python books would get a clue then.


>
> A function object, whereever (and however) it's defined, is a function
> object, not a method objet. Now what happens is that functions defined
> inside a class are wrapped in method (by default, instancemethod) objects.
>
> To be more accurate - and talking only about how it works for new-style
> classes - function objects implements the descriptor protocol, so when a
> function is a class attribute (which is what happens when the function
> is defined in the class statement's body), and is looked up on an
> instance, it returns an instancemethod object that has the instance and
> the function as attributes. This instancemethod object is itself
> callable, and when called returns the result of calling the function
> with the instance as first argument. classmethods and staticmethods are
> variants fo this scheme, calling the function with either the class as
> first arg (for classmethods) or just as-is (for staticmethods).
>
> Now when you set a function as an *instance* (not class) attribute, the
> descriptor protocol isn't invoked (it only works on class attributes),
> so if you want to use the function as a method, you have to do the
> wrapping by yourself (cf my other answer to the OP).
>
> HTH

I'm not going to help with these class / instance / whatever any more
and leave it to all you professionals.

Yes, it you can use self in an outside method, but the way the OP
asked the question and the nature of the traceback pointed to it just
being a normal function, not a method since the OP wasn't passing an
argument to the bugger.

Oh well. Live and learn to unlearn what you learned.

Mike



From mcl.office at googlemail.com  Sun Aug 19 04:50:15 2007
From: mcl.office at googlemail.com (mosscliffe)
Date: Sun, 19 Aug 2007 01:50:15 -0700
Subject: 1)URL QueryString Parsing  2)Search Engine Spiders
Message-ID: <1187513415.188232.187270@50g2000hsm.googlegroups.com>

I am trying to create a back link, equivalent to the browser back
action and I can not use java script. The target user does not allow
java script.

I am using HTTP_REFERER.

I need to add the original Query String values.

Is there a way to get the QueryString element other than by using
cgi.FieldStorage, as I just want to return with the values that were
current in the calling page.

gv.orgQueryString = ""

gv.BackButton = '<A href="' + os.environ.get("HTTP_REFERER") +
gv.orgQueryString + '">BACK</A>'

----------------------------------------------------------------------------------------
Am I right in thinking Search Engine Spiders will never see my script
pages as they exist only for the duration of the python script's
execution ?  And even then as they are   xxx.py, they would not be
seen.

Thanks

Richard



From half.italian at gmail.com  Mon Aug 27 20:19:09 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: Mon, 27 Aug 2007 17:19:09 -0700
Subject: Socket - gaierror
In-Reply-To: <favmbr$21sq$1@flame.contek.com>
References: <1188242671.182072.130150@r23g2000prd.googlegroups.com>
	<1188244050.029920.314700@i13g2000prf.googlegroups.com>
	<favmbr$21sq$1@flame.contek.com>
Message-ID: <1188260349.031088.69010@l22g2000prc.googlegroups.com>

On Aug 27, 4:22 pm, s... at signature.invalid (Douglas Wells) wrote:
> In article <1188244050.029920.314... at i13g2000prf.googlegroups.com>,
>
>
>
>  half.ital... at gmail.com writes:
> > On Aug 27, 12:32 pm, Larry Bates <larry.ba... at websafe.com> wrote:
>
> > Changing it to IP gives me the same exact error...
>
> >   File "bin/prgram.py", line 123, in notify
> >     smtp = smtplib.SMTP("XXX.XXX.XXX.XXX")
>
> >   File "/usr/lib/python2.4/smtplib.py", line 255, in __init__
> >     addr = socket.gethostbyname(socket.gethostname())
>
> > gaierror: (-2, 'Name or service not known')
>
> > Looks like the smtp port is closed on the client machine...doh Should
> > have gotten to that!
>
> > ~Sean
>
> Note that the lookup is of your *local* system name
> (socket.gethostname()).  I suspect that the name of your client
> system (the one running the python script) is not registered in
> DNS.
>
> Try ping'ing your own system and see if that resolves in DNS.  In
> UNIX/Linux you can use the hostname command; in any system you can
> write a python script to print the result of socket.gethostname().
>
>  - dmw
>
> --
> .   Douglas Wells             .  Connection Technologies      .
> .   Internet:  -sp9804- -at - contek.com-                     .

I found a solution...but still not sure why that happened.

root at 00:17:08:5E:EF:0F:/usr/local/sw/program/bin# hostname
00:17:08:5E:EF:0F
root at 00:17:08:5E:EF:0F:/usr/local/sw/program/bin# ping 00:17:08:5E:EF:
0F
ping: unknown host 00:17:08:5E:EF:0F

>>> socket.gethostname()
'00:17:08:5E:EF:0F'

Workaround: pass the 'local_hostname' arg to the smtplib.SMTP() call
with "localhost"

ie smtp.SMTP("some.computer", local_hostname="localhost")

This is just overriding the socket.gethostname() call entirely.

Did a bit of testing with the /etc/hosts file, and even with an entry
to the hostname it can't resolve the ip.
The problem is the name "00:17:08:5E:EF:0F"  PS.  I didn't choose to
set the hostname that way.

~Sean



From steve at holdenweb.com  Fri Aug 17 01:40:35 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 17 Aug 2007 01:40:35 -0400
Subject: defaultdict of arbitrary depth
In-Reply-To: <1187324831.082493.190970@w3g2000hsg.googlegroups.com>
References: <1187321113.841198.195100@22g2000hsm.googlegroups.com>	<mailman.2098.1187324422.22759.python-list@python.org>
	<1187324831.082493.190970@w3g2000hsg.googlegroups.com>
Message-ID: <fa3ccf$vuk$1@sea.gmane.org>

Paul McGuire wrote:
> On Aug 16, 11:19 pm, Carsten Haese <cars... at uniqsys.com> wrote:
>> On Thu, 2007-08-16 at 20:25 -0700, Paul McGuire wrote:
>>> [...]
>>> I've hacked out this recursivedefaultdict which is a
>>> defaultdict(defaultdict(defaultdict(...))), arbitrarily deep depending
>>> on the keys provided in the reference.
>>> Please comment.
>>> [...]
>>> class recursivedefaultdict(object):
>>>     def __init__(self):
>>>         self.__dd = defaultdict(recursivedefaultdict)
>>>     def __getattr__(self,attr):
>>>         return self.__dd.__getattribute__(attr)
>>>     def __getitem__(self,*args):
>>>         return self.__dd.__getitem__(*args)
>>>     def __setitem__(self,*args):
>>>         return self.__dd.__setitem__(*args)
>> This is shorter:
>>
>> from collections import defaultdict
>>
>> class recursivedefaultdict(defaultdict):
>>     def __init__(self):
>>         self.default_factory = type(self)
>>
>> --
>> Carsten Haesehttp://informixdb.sourceforge.net- Hide quoted text -
>>
>> - Show quoted text -
> 
> Of course, very short and sweet!  Any special reason you wrote:
>         self.default_factory = type(self)
> instead of:
>         self.default_factory = recursivedefaultdict
> ?
It's more robust under subclassing.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From steve at holdenweb.com  Thu Aug 30 13:21:53 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 30 Aug 2007 13:21:53 -0400
Subject: Please assist- Python Consultant needed for 3-6 month project
In-Reply-To: <s6d6b2f3.092@server1.softwarespecialist.com>
References: <s6d6b2f3.092@server1.softwarespecialist.com>
Message-ID: <46D6FCB1.4040709@holdenweb.com>

Kelley McNeillie wrote:
> I am contacting you from a company called Software Specialists, an IT Placement Firm based in Pittsburgh, PA.  We are prepared to make a donation to your organization if you could please help us out with a referral.  We are looking for a python developer with  web-based application experience.  If you know of anyone, or if you would be able to post this opportunity on your site, I would greatly appreciate it.  I am finding this skill pretty much impossible to identify locally, and I really would like to be able to assist my client with this position.   I am just trying to be creative in my search, I hope I am reaching the right person with this request.  If not, I apologize. Thank you in advance for any assistance you may be able to provide.
> 
Kelley:

Please see

   http://www.python.org/community/jobs/

(which, by the way, is the first non-sponsored result for a Google 
search on "python jobs") and in particular

   http://www.python.org/community/jobs/howto/

which explains how you can submit jobs for inclusion on the Job Board. 
There is no fee for this service, though naturally donations to the 
Python Software Foundation are always gratefully received:

   http://www.python.org/psf/donations/

Good luck with your search.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From steve at holdenweb.com  Thu Aug 16 07:31:36 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Aug 2007 07:31:36 -0400
Subject: ploting issues in program
In-Reply-To: <fa10su$rf2$02$1@news.t-online.com>
References: <1187250500.571837.196940@19g2000hsx.googlegroups.com>
	<fa10su$rf2$02$1@news.t-online.com>
Message-ID: <fa1cih$un7$1@sea.gmane.org>

Peter Otten wrote:
> yadin wrote:
> 
>> can you please help me to fix these polar plot in db's
>> so that the center is at the minimun negative number in voltagedb
>> about [-50]
>> and the maximun is at zero and how can i see values on the axis like
>> showing that the axes start at -50 -40 -30 .....and end at zero
> 
> You posted this question several times now and got no response that you
> liked enough to abstain from reposting.
> 
> Now your options are:
> 
> - Try another forum (the matplotlib mailing list would be a good candidate)
> - Show some initiative: add 50 to the dB values and be done
> 
>>  here is the program
> 
> [...]
> 
>> voltagedb =  [-48.7906044 ,-11.51244516, -5.58650713, -2.34604603,
>> -0.56767793,  0.        ,
>>               -0.60034598, -2.41427014,
>> -5.7042726 ,-11.75411924,-48.7906044 ,
>>               -11.51244516, -5.58650713, -2.34604603, -0.56767793,
>> 0.        ,
>>               -0.60034598, -2.41427014, -5.7042726 ,-11.75411924,]
> 
> voltagedb = [v+50 for v in voltagedb]
> 
>> polar(angteta,voltagedb)
>>
>> show()
> 
The better the advice the worse it's wasted ...

I might ask just exactly what is being plotted to give those answers. It 
sounds like field strength, but I am having difficulty envisaging a 
field that is weakest at its center - is this some sort of alternative 
universe you are plotting :-) ?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
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----------- Thank You for Reading -------------



From kyosohma at gmail.com  Fri Aug 17 17:12:10 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 17 Aug 2007 14:12:10 -0700
Subject: wxpython log redirect
In-Reply-To: <1187292591.151231.41440@b79g2000hse.googlegroups.com>
References: <1187292591.151231.41440@b79g2000hse.googlegroups.com>
Message-ID: <1187385130.720910.77210@q4g2000prc.googlegroups.com>

On Aug 16, 2:29 pm, vedrandeko... at v-programs.com wrote:
> Hello,
>
> Why this wx example don't return \nHELLO WORLD and other text in same
> window:
>
> import wx
> import logging
> import sys
>
> def nekaj():
>     print "\nHELLO WORLD"
>
> class WxLog(logging.Handler):
>     def __init__(self, ctrl):
>         logging.Handler.__init__(self)
>         self.ctrl = ctrl
>     def emit(self, record):
>         self.ctrl.AppendText(self.format(record)+"\n")
>
> class MainFrame(wx.Frame):
>     def __init__(self):
>         wx.Frame.__init__(self, None, title="logging test")
>         sizer = wx.BoxSizer(wx.VERTICAL)
>
>         log = wx.TextCtrl(self, style=wx.TE_MULTILINE)
>
>         rootLogger = logging.getLogger('')
>         rootLogger.setLevel(logging.DEBUG)
>         hdlr = WxLog(log)
>         hdlr.setFormatter(logging.Formatter('%(levelname)s | %(name)s |
> %(message)s [@ %(asctime)s in %(filename)s:%(lineno)d]'))
>         rootLogger.addHandler(hdlr)
>         rootLogger.debug(str(sys.stdout))
>         nekaj()  # goes to the function nekaj
>
> if __name__ =="__main__":
>     app = wx.App(0)
>     frame = MainFrame()
>     frame.Show()
>     app.MainLoop()
>
> Regards,
> Vedran

Why are you using the logging module? All you need to do is redirect
stdout. See below:

Give this a try:

<code>

class XPinst(wx.App):
    def __init__(self, redirect=False, filename=None):
        wx.App.__init__(self, redirect, filename)

    def OnInit(self):
        self.frame = wx.Frame(None, -1, title='Redirect Test',
                              size=(620,450),
                              style=wx.STAY_ON_TOP|
                                    wx.DEFAULT_FRAME_STYLE)

        panel = wx.Panel(self.frame, -1)

        self.log = wx.TextCtrl(panel, -1, size=(500,400),
                              style = wx.TE_MULTILINE|wx.TE_READONLY|
                                      wx.HSCROLL)
        redir=RedirectText(self.log)
        sys.stdout=redir
        print 'test'

        self.frame.Show()
        return True

class RedirectText:
    def __init__(self,aWxTextCtrl):
                self.out=aWxTextCtrl

    def write(self,string):
                 self.out.WriteText(string)

</code>

If you use wx.App, you can also just set the "redirect" parameter to
True as well.

Mike



From __peter__ at web.de  Wed Aug  8 12:18:22 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 08 Aug 2007 18:18:22 +0200
Subject: 'Advanced' list comprehension? query
References: <1186588812.006107.185570@o61g2000hsh.googlegroups.com>
Message-ID: <f9cqch$qmc$00$1@news.t-online.com>

 pyscottishguy at hotmail.com wrote:

> I'm playing around with list comprehension, and I'm trying to find the
> most aesthetic way to do the following:
> 
> I have two lists:
> 
> noShowList = ['one', 'two', 'three']
> 
> myList = ['item one', 'item four', 'three item']
> 
> I want to show all the items from 'myList' that do not contain any of
> the strings in 'noShowList'.

>>> no_show_list = ["one", "two", "three"]
>>> my_list = ["item one", "item four", "three item"]
>>> [item for item in my_list if not any(x in item for x in no_show_list)]
['item four']

Peter


From bj_666 at gmx.net  Thu Aug 30 08:35:06 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 Aug 2007 12:35:06 GMT
Subject: SAXParseException: not well-formed (invalid token)
References: <fb6alc$pfj$1@news.cesga.es>
Message-ID: <5jnrrqFdmbcU5@mid.uni-berlin.de>

On Thu, 30 Aug 2007 13:46:47 +0200, Pablo Rey wrote:

> 	The page is 
> https://lcg-voms.cern.ch:8443/voms/cms/services/VOMSCompatibility?method=getGridmapUsers 
> and the line with the invalid character is (the invalid character is the 
> final ? of Universit?):

The URL doesn't work for me in a browser.  (Could not connect?)

Maybe you can download that XML file and use `xmllint` to check if it is
well formed XML!?

Ciao,
	Marc 'BlackJack' Rintsch


From alexandre.badez at gmail.com  Fri Aug 31 04:14:21 2007
From: alexandre.badez at gmail.com (Alexandre Badez)
Date: Fri, 31 Aug 2007 08:14:21 -0000
Subject: Setting a read-only attribute
In-Reply-To: <1188509700.915517.178440@z24g2000prh.googlegroups.com>
References: <1188509700.915517.178440@z24g2000prh.googlegroups.com>
Message-ID: <1188548061.663133.273160@q5g2000prf.googlegroups.com>

On Aug 30, 11:35 pm, "tleeuwenb... at gmail.com" <tleeuwenb... at gmail.com>
wrote:
> I have an object and wish to set an attribute on it which,
> unfortunately for me, is read-only.
>
> How can I go about this?
>
> Cheers.
> -T


Could you show the object you want to set his attribute?
Until that, it's difficult to answer to you.

PS: If the attribut is on read only, their must a good reason for
that ;)



From bdesth.quelquechose at free.quelquepart.fr  Thu Aug 30 08:07:39 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 30 Aug 2007 14:07:39 +0200
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188504811.019632.186580@x35g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<1188430887.481586.106760@l22g2000prc.googlegroups.com>
	<mailman.159.1188499976.28954.python-list@python.org>
	<1188504811.019632.186580@x35g2000prf.googlegroups.com>
Message-ID: <46d75116$0$401$426a74cc@news.free.fr>

Russ a ?crit :
(snip)

> I don't see how you can avoid adding some new syntax, given that
> Python does not
> currently have syntax for specifying invariants and pre- and post-
> conditions. 

class Parrot(object):
   @pre(lambda x : x != 42)
   @post(lambda result: result != 42)
   @invariant(lambda self: self.x == 42)
   def reliable_method(self, x):
     # your code here
     return something



From steve at holdenweb.com  Fri Aug  3 15:10:01 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 03 Aug 2007 15:10:01 -0400
Subject: downloading files
In-Reply-To: <1186166920.757662.269340@o61g2000hsh.googlegroups.com>
References: <1186166920.757662.269340@o61g2000hsh.googlegroups.com>
Message-ID: <f8vui9$fsr$1@sea.gmane.org>

Ehsan wrote:
> I foundd this code in ASPN  Python Cookbook for downloading files in
> python but when it finished downloading files the files became
> corrupted and didn't open, the files in internet havn't any problem:
> 
> 
> def download(url,fileName):
> 	"""Copy the contents of a file from a given URL
> 	to a local file.
> 	"""
> 	import urllib
> 	webFile = urllib.urlopen(url)
> 	localFile = open(fileName, 'w')
> 	localFile.write(webFile.read())
> 	webFile.close()
> 	localFile.close()
> download('http://www.2shared.com/download/1839752/cd520048/
> xpersia14.3gp?tsid=20070803-143313-49566ea2', 'xpersia4.3gp' )
> 
I'm guessing there are binary files and you are running on Windows, 
which is inserting a carriage return before ebery newline. Try

	localFile = open(fileName, 'wb')

to avoid thus behavior.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From jjl at pobox.com  Mon Aug 20 15:46:45 2007
From: jjl at pobox.com (John J. Lee)
Date: Mon, 20 Aug 2007 19:46:45 GMT
Subject: desperately in need of a tool
References: <1187560418.339131.283470@i38g2000prf.googlegroups.com>
Message-ID: <87hcmuxa3e.fsf@pobox.com>

yagyala <mbrown at phys.ksu.edu> writes:

> I recently started working for a company that has just implemented its
> first set of software standards. So far, so good. Here's the problem:
> one of those standards is that the comments for each routine must
> indicate every other routine that it calls. As I try to keep my

Oh dear.


> I'm sure some will wonder about the reasoning of this standard. The
> company primarily has experience writing scientific alogorythms which
> can get rather long. It makes a bit more sense to document all
> routines called for a very long routine, but for short routines that
> primarily call other routines, as most mine do, well....

Perhaps you can reason with them.  Perhaps suggest the possibility
that parts of the standard be waived or modified for the area of work
you're involved with (rather than asking them for special personal
dispensation, or asking them to throw away or rewrite their
standards).


John


From fukazawa at gmail.com  Sun Aug 19 05:21:27 2007
From: fukazawa at gmail.com (Andy)
Date: Sun, 19 Aug 2007 09:21:27 -0000
Subject: Development for dual core machine
Message-ID: <1187515287.226791.186700@j4g2000prf.googlegroups.com>

Hi guys,

I'm sorry, I'm not sure this is the correct group to be asking this
kind of question...

I'm going to develop a software package that includes a web server
(and PHP code) , a database, and some Python code of course.  I am
being strongly suggested to make it to work on a dual- or multi-core
computer, but I'm confused on how to take advantage of the multiple
CPUs.

>From what I read, I think that simply by making the package run in
several separate processes (web server, database server, Python
interpreter, etc.), and/or using multiple threads (which I will
anyway) the package should be able to use multiple CPUs.

Is my understanding correct?  So actually, all I have to do is just
write my multi-threaded Python code as usual?  And how is it decided
which process and which threads go to CPU 1, CPU 2, etc.?  Perhaps the
BIOS?

Any advice greatly appreciated.
Andy



From gagsl-py2 at yahoo.com.ar  Mon Aug 20 23:32:17 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Aug 2007 20:32:17 -0700
Subject: Retrieving a variable's name.
In-Reply-To: <1187658202.236626.93600@50g2000hsm.googlegroups.com>
References: <1187658202.236626.93600@50g2000hsm.googlegroups.com>
Message-ID: <1187667137.290457.314060@d55g2000hsg.googlegroups.com>

On 20 ago, 22:03, rodrigo <rodrigo... at gmail.com> wrote:

> How would I go about retrieving a variable's name (not its value)? I
> want to write a function that, given a list of variables, returns  a
> string with each variable's name and its value, like:
>
> a: 100
> b: 200
>
> I get the feeling this is trivial, but I have been unable to find an
> answer on my own.

Try using dir(), dir(xxx), vars(), vars(xxx), locals(), globals()
<http://docs.python.org/lib/built-in-funcs.html>

--
Gabriel Genellina



From gherron at islandtraining.com  Sat Aug 18 14:54:59 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 18 Aug 2007 11:54:59 -0700
Subject: sort dictionary by specific values
In-Reply-To: <d6a0d8f10708181140p43208d0q199f08159f5c45ff@mail.gmail.com>
References: <d6a0d8f10708181140p43208d0q199f08159f5c45ff@mail.gmail.com>
Message-ID: <46C74083.4050307@islandtraining.com>

dorje tarap wrote:
> Hi,
>
> I need to perform some horrible functions in python I need to do,
> using sort in a similar way that Excel can.
>
> With a dictionary like:
> Code: ( text )
>
>   1.
>       >>> d
>   2.
>       {8: (99, 99), 9: [(55, 67), (77, 66), (67, 88)], 4: [(45, 78),
>       (56, 78), (99, 78)], 5: (67, 77)}
>
>
> I want to sort the entire dictionary based on the last values in each
> line. First for [-1][0] and then[-1][0].
>
> So sorted descending I would like the output to look like:
> Code: ( text )
>
>   1.
>       >>> d
>   2.
>       {8: (99, 99), 4: [(45, 78), (56, 78), (99, 78)], 9: [(55, 67),
>       (77, 66), (67, 88)], 5: (67, 77)}
>
>
> Many thanks 
I can't make any sense of your requirements or your example, but perhaps
I can help somewhat.

You CANNOT sort a (standard Python) dictionary.   You CAN find some
alternative implements of dictionaries on the web that allow ordering,
and you CAN extract the key,value pairs from a dictionary into a list,
and sort that list (by any criteria you want). 

Gary Herron



From gherron at islandtraining.com  Thu Aug 30 10:48:50 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 30 Aug 2007 07:48:50 -0700
Subject: strings (dollar.cents) into floats
In-Reply-To: <12B58F2B-2F4F-4F6A-9F75-7444427B8CA8@email.it>
References: <12B58F2B-2F4F-4F6A-9F75-7444427B8CA8@email.it>
Message-ID: <46D6D8D2.2030102@islandtraining.com>

luca bertini wrote:
> Hi,
>
> i have strings which look like money values (ie 34.45)
> is there a way to convert them into float variables?
> everytime i try I get this error: "numb = float(my_line) ValueError:  
> empty string for float()"
> "
> here's the code
>
> ************
>
> import sys
> import re
>
> for line in sys.stdin.readlines():
> 	my_line = line.rstrip()
> 	numb = float(my_line)
> 	print numb
>   
The clue "empty string for float" must mean that the value of my_line is
an empty string.  And that would seem to mean you have an empty line in
your input. 

So...  Either remove the empty lines, or test my_line before calling
float on it.

Gary Herron



From sdavis.webb at gmail.com  Fri Aug  3 13:53:47 2007
From: sdavis.webb at gmail.com (Stephen Webb)
Date: Fri, 3 Aug 2007 13:53:47 -0400
Subject: Strange set of errors
Message-ID: <fee9cfbd0708031053s6c9f70e2wc16e299a64d56d6@mail.gmail.com>

Greetings all,

I've recently begun using Python to do scientific computation, and I wrote
the following script to find approximate eigenvalues for a semi-infinite
matrix:


from pylab import *
from numpy import *
from scipy import *

def bandstructure(N,s):

    b = s/4.0

    jmax = 10 + N**2

    spectrum1 = [0]*2*N
    spectrum2 = [0]*2*N
    spectrum3 = [0]*2*N


    for k in arange(1, 2*N+1, 1):

        A = zeros( (jmax,jmax) )

        i = 0
        while i <= jmax-1:
            if i <= jmax-2:
                A[i,i+1] = b
                A[i+1,i] = b
                A[i,i] = ((k + 2.0*i*N)/N)**2
                i = i+1
            else:
                A[i,i] = ((k + 2.0*i*N)/N)**2
                i = i+1

        #This portion of the code builds a matrix twice as large to check
against

        B = zeros( (2*jmax,2*jmax) )

        i = 0
        while i <= 2*jmax-1:
            if i <= 2*jmax-2:
                B[i,i+1] = b
                B[i+1,i] = b
                B[i,i] = ((k + 2.0*i*N)/N)**2
                i = i+1
            else:
                B[i,i] = ((k + 2.0*i*N)/N)**2
                i = i+1

        x = linalg.eigvals(A)
        y = linalg.eigvals(B)

        j = 1
        while j<=3:
            if abs(y[j]-x[j]) <= 10.0**(-5):
                j = j + 1
            else:
                print 'jmax not large enough to obtain accurate results'

        spectrum1[k-1] = x[0] + 0.5*s
        spectrum2[k-1] = x[1] + 0.5*s
        spectrum3[k-1] = x[2] + 0.5*s

    plot (k, spectrum1, k, spectrum2, k, spectrum3)

    xlabel('k (energy level)')
    ylabel('E/E_r')
    title('Finite Size Band Structure, N = %d, s = %f' % (N, s))
    grid(true)


When I run this script, I get the following message, which I can't figure
out:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "bandstruc.py", line 61, in bandstructure
    plot (k, spectrum1, k, spectrum2, k, spectrum3)
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/pylab.py",
line 2028, in plot
    ret =  gca().plot(*args, **kwargs)
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/axes.py",
line 2535, in plot
    for line in self._get_lines(*args, **kwargs):
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/axes.py",
line 437, in _grab_next_args
    for seg in self._plot_2_args(remaining[:2], **kwargs):
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/axes.py",
line 337, in _plot_2_args
    x, y, multicol = self._xy_from_xy(x, y)
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/axes.py",
line 266, in _xy_from_xy
    nrx, ncx = x.shape
ValueError: need more than 0 values to unpack

Also, I've been having trouble with the plot function in matplotlib. For
example, I enter the following in the terminal:

>>> from pylab import *
>>> plot([1,2,3])
[<matplotlib.lines.Line2D instance at 0x16adda30>]

I'm reasonably sure that the issue in the first big error message is just an
indexing error on my part, but I have no idea what the second thing means.
Every time I run the plot([1,2,3]) I get a different ending number that
seems to vary randomly.

Could anybody please help me out with these problems?

Thanks,

Stephen
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From exarkun at divmod.com  Thu Aug  2 19:36:43 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 2 Aug 2007 19:36:43 -0400
Subject: python 3.0, pywin32 and scipy
In-Reply-To: <5hevcaF3kia6jU1@mid.uni-berlin.de>
Message-ID: <20070802233643.4947.706164934.divmod.quotient.17708@ohm>

On Thu, 02 Aug 2007 23:07:12 +0200, "Diez B. Roggisch" <deets at nospam.web.de> wrote:
>Jean-Paul Calderone schrieb:
>> On Thu, 02 Aug 2007 21:16:04 +0200, "Diez B. Roggisch"
>> <deets at nospam.web.de> wrote:
>>> vml schrieb:
>>>> Hello,
>>>>
>>>>
>>>> I am trying to promote python in my job, my collegue only see matlab
>>>> and microsoft scripting language.
>>>> I understood that there willl be no backward compatibility between
>>>> python 2.x and 3.0, does it means that:
>>>>
>>> [snip]
>>>
>>> You mean C#, the language that has seen 3 major revisions in the last 6
>>> years of existence, with C# 3 being announced already? And the .NET SDK,
>>> that happily strode along with that? Compared to python, that has been
>>> started in 1991 and now approaches it's third incarnation, I'd say
>>> python has a record of steadiness that surpasses that of MS-based tools
>>> by any means.
>>
>> This is not a valid comparison.  In fact, C# 3 is completely backwards
>> compatible with C# 2, just as C# 2 was backwards compatible with C# 1.
>
>Does that also apply to the SDK?
>

I'm not really sure what the answer to that is.  I presume so, but perhaps
someone who has more C# experience can chime in.

Jean-Paul


From kyosohma at gmail.com  Thu Aug  9 16:24:48 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 09 Aug 2007 13:24:48 -0700
Subject: Puzzled by "is"
In-Reply-To: <mailman.1810.1186689236.22759.python-list@python.org>
References: <20070809194105.39BD11E400A@bag.python.org>
	<mailman.1810.1186689236.22759.python-list@python.org>
Message-ID: <1186691088.090783.93810@z24g2000prh.googlegroups.com>

On Aug 9, 2:53 pm, Steve Holden <st... at holdenweb.com> wrote:
> Dick Moores wrote:
> > At 10:46 AM 8/9/2007, Bill Scherer wrote:
> >> Dick Moores wrote:
> [...]
> >> There is only one empty tuple.
> >> Does that clear it up for you?
>
> > But isn't that the same as saying, "That's just the reality of
> > Python; it is what it is."? I want to know why there is only one
> > empty tuple, but more than one (1,).
>
> Why? Because.
>
> Seriously, it's just an optimization by the implementers. There is no
> need for more than one empty tuple, since tuples can never be modified
> once created.
>
> But they decided not to create (1, ) in advance. They probably knew that
> hardly anybody would want to create that tuple ;-) [Seriously: if you
> started trying to predict which tuples would be used you would go
> insane, but the empty tuple is the most likely candidate].
>
> > Also,
> >  >>> [] is []
> > False
>
> In that case it would definitely NOT make sense to have them the same
> list. Python always ensures that the [] constructor creates a new list,
> since that list may be bound to one or more variables and mutated. You
> wouldn't want
>
>    a = []
>    b = []
>    a.append("boo!")
>
> to change b so it was no longer an empty list. If you wanted a and b to
> reference the same list you would change the second statement to
>
>    b = a
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------

Steve,

I thought you'd probably weigh in on this esoteric matter. Very
illuminating, as usual.

Mike



From bignose+hates-spam at benfinney.id.au  Thu Aug 30 04:04:50 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 30 Aug 2007 18:04:50 +1000
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au>
Message-ID: <874pihe9ct.fsf@benfinney.id.au>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

>     def get_an_index_even_if_not_found(the_list, the_item):

Bah. Should be "?(the_list, the_value):".

-- 
 \        "Don't worry about people stealing your ideas. If your ideas |
  `\    are any good, you'll have to ram them down people's throats."  |
_o__)                                                  -- Howard Aiken |
Ben Finney


From spam at spam.com  Wed Aug 15 13:53:18 2007
From: spam at spam.com (daz.diamond)
Date: Wed, 15 Aug 2007 17:53:18 GMT
Subject: ming on win32 anyone ? [help a noob]
In-Reply-To: <1187189695.581003.317920@q4g2000prc.googlegroups.com>
References: <%QCwi.14541$rr5.1213@newsfe1-win.ntli.net>
	<1187189173.036327.65360@r29g2000hsg.googlegroups.com>
	<1187189695.581003.317920@q4g2000prc.googlegroups.com>
Message-ID: <i4Hwi.16048$ph7.4919@newsfe5-win.ntli.net>

kyosohma at gmail.com wrote:
> On Aug 15, 9:46 am, "programmer... at gmail.com"
> <programmer... at gmail.com> wrote:
>> On Aug 15, 8:03 am, "daz.diamond" <s... at spam.com> wrote:
>>
>>> hoping someone can help ...
>>> how do I install ming (with python) on win32? have downloaded the tar.gz
>>> of ming-0.3.0 which doesn't have a handy self-installer, and I'm
>>> absolutely foxed as to what to do next ... the install instructions in
>>> the package seem to be linux oriented, which to me may as well be in greek
>>> any clues much appreciated, thx
>>> daz
>> I don't know what you've downloaded, but it does not sound like the
>> right thing, err ming.  The installer found here is 5.1.3.http://sourceforge.net/project/showfiles.php?group_id=2435
>>
>> Maybe you should consider cygwin?
>>
>> jw
> 
> I think the OP is referring to this: http://ming.sourceforge.net/
> 
> If so, it looks like it needs manual compilation using a C/C++
> compiler of some sort.
> 
> Mike
> 

yup, ming as in the ability to make swf files ... got it running with 
php no problem, but python seems another story ...
manual compilation using c/c++ sounds complicated - is this the sort of 
thing i could do without knowledge of c/c++ or am i just barking at 
lamp-posts ?

thx
daz


From gagsl-py2 at yahoo.com.ar  Thu Aug  2 19:32:23 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 02 Aug 2007 20:32:23 -0300
Subject: Best way to capture output from an exec'ed (or such) script?
References: <1186084086.212050.264270@q3g2000prf.googlegroups.com>
Message-ID: <op.twggz9lox6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 02 Aug 2007 16:48:06 -0300, <exscape at gmail.com> escribi?:

> In any case. I've added some minor scripting support, so that you can
> write dynamic pages in Python. To do this, I use execfile(), and pass
> the script a dictionary with some basic variables. The script then
> sets a "ret" variable that's sent back to the browser. That's some
> major ugliness right there! If I do a "print" inside the script, then
> it'll end up on the server console. I want it to end up in the web
> browser.

If `print` were a function, this would be easy: just provide a replacement  
into the dictionary you pass to the script. But print is a statement, and  
this becomes a bit harder.

If your web server only processes a single request at a time, you can  
replace sys.stdout (and perhaps sys.stderr) with a suitable object having  
a write() function: a true open file, or a StringIO instance, or even a  
custom object that collects "printed" lines into a list.

If your web server is multithreaded (or you use some other way to process  
many simultaneous requests) you have to be more careful - remember that  
sys.stdout is global, you must find a way to distinguish between output  
 from different processes all going into the same collector.

-- 
Gabriel Genellina



From fukazawa at gmail.com  Sun Aug 19 22:45:50 2007
From: fukazawa at gmail.com (Andy)
Date: Mon, 20 Aug 2007 02:45:50 -0000
Subject: Development for dual core machine
In-Reply-To: <5irrbdF3r2m8aU3@mid.individual.net>
References: <1187515287.226791.186700@j4g2000prf.googlegroups.com>
	<7x3ayfsagr.fsf@ruckus.brouhaha.com>
	<5irrbdF3r2m8aU3@mid.individual.net>
Message-ID: <1187577950.231283.254950@i38g2000prf.googlegroups.com>

Thanks guys for the suggestions.

Andy



From ianare at gmail.com  Mon Aug 13 01:01:04 2007
From: ianare at gmail.com (=?iso-8859-1?B?aWFuYXLp?=)
Date: Mon, 13 Aug 2007 05:01:04 -0000
Subject: Colored text
In-Reply-To: <1186970751.435970.189900@q3g2000prf.googlegroups.com>
References: <1186970751.435970.189900@q3g2000prf.googlegroups.com>
Message-ID: <1186981264.235988.40260@k79g2000hse.googlegroups.com>

On Aug 12, 10:05 pm, Rohan <vodela.... at gmail.com> wrote:
> Hello,
> Can some one tell me how do I get colored text. Say when I want to
> write something in a text file , how do I get it colored.

Plain text files don't have color. You could output in html ...



From listserver at tdw.net  Mon Aug 20 15:13:38 2007
From: listserver at tdw.net (Tim Williams)
Date: Mon, 20 Aug 2007 20:13:38 +0100
Subject: reading a line in file
In-Reply-To: <R81734813.823.82795.2@mxextra>
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>
	<2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com>
	<B81734159.43.61526.2@mxextra>
	<9afea2ac0708201159t4602fe3fpfb738a22f063f37@mail.gmail.com>
	<R81734813.823.82795.2@mxextra>
Message-ID: <9afea2ac0708201213j505aa188t6ef079e4bf07cb37@mail.gmail.com>

On 20/08/07, Brian McCann <Brian.McCann at viziant.net> wrote:
>
>
>
> ________________________________
> From: tdwdotnet at gmail.com on behalf of Tim Williams
> Sent: Mon 8/20/2007 2:59 PM
> To: Brian McCann
> Cc: python-list at python.org
> Subject: Re: reading a line in file
>
>
>
>
> On 20/08/07, Brian McCann <Brian.McCann at viziant.net> wrote:
> >
> > Hi,
> >
> > I can read in the whole file build.number which has the following lines
> > how do I just capture the value of build.number and assign it to a
> variable
> > Thanks,
> > Brian
> >
> > contents of file build.number:
> > #Build Number for ANT. Do not edit!
> > #Mon Aug 20 04:04:51 EDT 2007
> > build.number=1
> > buildinfo.py
> > ##################################
> > #!/usr/bin/python
> > import string
> > import os
> > import sys
> > import time
> > import errno
> > import shutil
> > buildinfo = "build.number"
> > input = open(buildinfo, 'r')
> > for line in input:
> >         print line
> > #########################################
> >
> > command line when script is run
> > $ buildinfo.py
> > #Build Number for ANT. Do not edit!
> >
> > #Mon Aug 20 04:04:51 EDT 2007
> > build.number=1
> >
> >
>
> This is preferred nowadays
>
> for line in open(buildinfo):
>         print line
>
> Without a sample of the data, no-one can help you further.   If this
> is homework, you should say so, people will give you guidance :)
>



> Hi Tim,
> The sample data is in file build.number
>
> contents of file build.number:
>
>  #Build Number for ANT. Do not edit!
>  #Mon Aug 20 04:04:51 EDT 2007
> build.number=1
>
> Thanks,
> Brian
>
(bottom posting is preferred here :)  )

Brian,  can you expand on this a bit?    A single entry doesn't give
much to go on.   20-ish lines would be better.    Anyone looking at
this would need to see whether each entry was on its own line, whether
there are duplicates,  whether delimiters are always the same etc.


From kyosohma at gmail.com  Thu Aug  9 09:03:34 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 09 Aug 2007 06:03:34 -0700
Subject: wxPython before MainLoop
In-Reply-To: <13bl9a75laqcm70@corp.supernews.com>
References: <13bl9a75laqcm70@corp.supernews.com>
Message-ID: <1186664614.771337.198570@x40g2000prg.googlegroups.com>

On Aug 9, 12:25 am, "[david]" <da... at nospam.spam> wrote:
> I'd like to refresh the display before I start the main loop.
>
> I have code like this:
>
> app = App()
> app.Show()
> app.long_slow_init()
> app.MainLoop()
>
> The main frame partly loads at Show, but because the mainloop has not
> started yet, the display does not update until long_slow_init() finishes.
>
> Alternatively, I could code
>
> app = App()
> app.long_slow_init()
> app.Show()
> app.MainLoop()
>
> Which would give me a crisp Show, but there would be a long slow wait
> before the app showed any activity at all. I would need a splash screen.
>
> I'd rather not have a splash screen (and I don't know how anyway). I'd
> like to just make app.Show() finish correctly before running
> long_slow_init.
>
> Is there a wx internal method that I can use to give Windows the
> opportunity to finish painting the frame before I run long_slow_init()?
>
> Or is there a better idea?
>
> (david)

Yeah, I think 7stud's thread is the way to go. It's what I do with
long running tasks, see also:
http://wiki.wxpython.org/LongRunningTasks

If your screen doesn't load correctly, be sure to call the Layout()
method.

Mike



From zyzhu2000 at gmail.com  Wed Aug  1 12:42:58 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Wed, 01 Aug 2007 16:42:58 -0000
Subject: Awkward format string
In-Reply-To: <mailman.1440.1185985928.22759.python-list@python.org>
References: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
	<mailman.1440.1185985928.22759.python-list@python.org>
Message-ID: <1185986578.527619.314310@e9g2000prf.googlegroups.com>

On Aug 1, 11:31 am, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/1/07, beginner <zyzhu2... at gmail.com> wrote:
>
> > Hi,
>
> > In order to print out the contents of a list, sometimes I have to use
> > very awkward constructions. For example, I have to convert the
> > datetime.datetime type to string first, construct a new list, and then
> > send it to print. The following is an example.
>
> >         x=(e[0].strftime("%Y-%m-%d"), e[1].strftime("%Y-%m-%d"))+e[2:]
> >         print  >>f, "%s\t%s\t%d\t%f\t%f\t%f\t%d" % x
>
> > e is a tuple. x is my new tuple.
>
> > Does anyone know better ways of handling this?
>
> You seem to be doing quite complicated things with your magical e
> tuple. Do you have some specific aversion to classes?

e is not complicated. It is a record that have 7 fields. In my program
a function outputs a list of tuples, each is of type e, and now I just
need to send them to a text file.

I have no problem using classes and I do use them everywhere. But
using classes does not solve my problem here. I will probably find
myself doing:

print  >>f, "%s\t%s\t%d\t%f\t%f\t%f\t%d" % (x.field1..strftime("%Y-%m-
%d"), x.field2..strftime("%Y-%m-%d"), x.field3, x.field4, x.field5,
x.field.6, x.field7)

This is also tedious and error-prone.





From mccredie at gmail.com  Mon Aug 27 19:06:28 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Mon, 27 Aug 2007 16:06:28 -0700
Subject: an eval()-like exec()
In-Reply-To: <1188241165.418263.165730@k79g2000hse.googlegroups.com>
References: <1188241165.418263.165730@k79g2000hse.googlegroups.com>
Message-ID: <9e95df10708271606i707272c1y84bfbce2f82b487c@mail.gmail.com>

> A python interactive interpreter works by having the user type in some
> code, compiling and running that code, then printing the results. For
> printing, the results are turned into strings.
>
> I would like make an interpreter which does this, without the last
> part: i.e. where the results are returned as objects, instead of as
> strings. I.e. have I would like to see something that behaves like
> this:
>
> >>> ip = MyInterpreter()
> # this started a new interpreter
> >>> ip.run("import math") is None
> True
> >>> ip.run("math.pi") is math.pi
> True
>
> Neither exec() or eval() is usable for this, as far as I see, because
> eval can't handle arbitrary python code (eval("import math") ), and
> exec() doesn't return the results.
>
> Subclassing an code.InteractiveInterpreter or code.InteractiveConsole
> seems like a usable idea, but I couldn't find out what to do to get
> the results before they are turned into strings.
>
> Using compile() and then eval() didn't seem usable either.
>
> Any ideas?

Well, my first thought is that exec and eval serve two different
purposes, and you should just have both of them and use the
appropriate one based on the situation. However, I think it is
possible to enable the behavior you want:

[code]
def myeval(statement, globals_=None, locals_=None):
    try:
        return eval(statement, globals_, locals_)
    except SyntaxError:
        if locals_ is None:
            import inspect
            locals_ = inspect.currentframe().f_back.f_locals
        exec statement in globals_, locals_
[/code]

It seems to work for me.

Matt


From Shawn at Milochik.com  Tue Aug 28 11:22:04 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Tue, 28 Aug 2007 11:22:04 -0400
Subject: Asking all python programmers.
In-Reply-To: <eb79828c0708272042x238f575aq28d01964bf6ab1db@mail.gmail.com>
References: <eb79828c0708272042x238f575aq28d01964bf6ab1db@mail.gmail.com>
Message-ID: <2dc0c81b0708280822t70bf0528s4f80fe926cbb91bf@mail.gmail.com>

On 8/27/07, Lamonte Harris <pyth0nc0d3r at gmail.com> wrote:
> Okay,  I know you've guys told me millions of times to read the manual I've
> read a lot of it.  What do you recommend studying the most? Python is my
> goal for the next year in the half. :)
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Some notes on your question:

"You've guys" is nonsensical.
Your first sentence is a run-on sentence.
Your e-mail address identifies you as an immature script-kiddie.
"Year in the half" is nonsensical.

Okay, so why am I "picking on you"? Because I want to help. Present
yourself in this way, and you're not going to get as much help from
intelligent people as you would if they saw you were worth their time.

You are either going to get angry at me or you're going to think about
this. If you're angry then I can't help you. If you actually care how
people see you, you will get further in life in general.

To answer the question I think you were trying to ask, a combination
of "The Python Cookbook" and "Dive Into Python" should get you started
in doing amazing things with Python. The latter is available for free
online.

Take some pride in the way you write. It will pay off.

Shawn


From lasses_weil at klapptsowieso.net  Thu Aug 30 15:18:06 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Thu, 30 Aug 2007 21:18:06 +0200
Subject: subclassing Python types
In-Reply-To: <1188500442.434722.157350@q5g2000prf.googlegroups.com>
References: <1188500442.434722.157350@q5g2000prf.googlegroups.com>
Message-ID: <46d717f5$0$30367$9b4e6d93@newsspool4.arcor-online.net>

zzbbaadd at aol.com wrote:
> I have read that you can derive from the base classes such as str,
> list, dict.
> 
> I guess this would look like:
> 
> def MyString(str):
> def MyList(list):
> def MyDict(dict):
> 
> 
Well, replace 'def' with 'class' and you're right.

> How do you access the data that is contained in the super class?
> 
This way:
 >>> class MyList(list):
...    def do_something(self):
...       self.append(3)
...       print self
...
 >>> l = MyList((1, 2))
 >>> l
[1, 2]
 >>> l.do_something()
[1, 2, 3]


That is: Whenever you want to refer to the value refer to self (that is, 
refer to the instance of your class).

/W


From bj_666 at gmx.net  Thu Aug  9 09:04:49 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 9 Aug 2007 13:04:49 GMT
Subject: check if regeular expression has results
References: <1186664302.050036.302670@g4g2000hsf.googlegroups.com>
Message-ID: <5i0hnhF3kuhitU1@mid.uni-berlin.de>

On Thu, 09 Aug 2007 05:58:22 -0700, shahargs wrote:

> I'm looking for the best way to check if regular expression return
> true (it's mean - there is a match). for example, i want "if" that
> check if this regular expression: .*born.*to.* has a match.
> 
> What's the way to do that simply?

Simply use an ``if`` on the result of the search or match.  If the regular
expression doesn't match `None` is returned, which is `False` in a boolean
context, otherwise a match object is returned, which is `True` in a
boolean context.

Ciao,
	Marc 'BlackJack' Rintsch


From robert.kern at gmail.com  Thu Aug 30 16:42:15 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 30 Aug 2007 15:42:15 -0500
Subject: Biased random?
In-Reply-To: <fb77bq$jtk$1@ss408.t-com.hr>
References: <favd0c$fcu$1@ss408.t-com.hr>	<mailman.80.1188332647.28954.python-list@python.org>
	<fb77bq$jtk$1@ss408.t-com.hr>
Message-ID: <fb7a3d$phj$1@sea.gmane.org>

Ivan Voras wrote:
> Jeffrey Barish wrote:
> 
>> If you take the difference between two uniformly distributed random
>> variables, the probability density function forms an isosceles triangle
>> centered at 0.  Take the absolute value of that variable and the pdf is a
>> straight line with maximum value at 0 tapering to 0 at max.  Thus,
>>
>> z = abs(randint(0, max) - randint(0, max))
>>
>> ought to do the trick.
> 
> It's elegant :)
> 
> I've noticed something interesting in my test: the value 0 appears less
> often than other values (which behave as they should).

The distribution of the difference (before the abs()) looks like this (max=4):

    #
   ###
  #####
 #######
 ---0+++
 321 123

Taking the absolute value doubles up the non-zero masses, but there's no
"negative 0" to add to the 0s stack.

  #
  #
 ###
 ###
 ####
 ####
 0123

The method does not work because of that.

-- 
Robert Kern

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



From debl2NoSpam at verizon.net  Wed Aug  1 00:50:41 2007
From: debl2NoSpam at verizon.net (David Lees)
Date: Wed, 01 Aug 2007 04:50:41 GMT
Subject: Scipy and Mcafee Site Advisor?
Message-ID: <BiUri.9638$9I3.2388@trndny06>

I know scipy.org is legit and supplies widely used and useful python 
packages.  Can someone explain why my McAfee SiteAdvisor software, flags 
  scipy.org as a dangerous site?  Pardon my ignorance, but is this a 
temporary error in the SiteAdvisor database or is there some privacy 
consideration involved?  I am wondering if I should remove the 
SiteAdvisor software, because it is not particularly reliable.

Puzzled.

david lees


From kyosohma at gmail.com  Tue Aug 28 11:08:29 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 28 Aug 2007 08:08:29 -0700
Subject: wxpython:how to minimize to taskbar
In-Reply-To: <1188312614.463169.93890@k79g2000hse.googlegroups.com>
References: <1188310247.587456.103440@i13g2000prf.googlegroups.com>
	<1188312614.463169.93890@k79g2000hse.googlegroups.com>
Message-ID: <1188313709.301024.193960@y42g2000hsy.googlegroups.com>

On Aug 28, 9:50 am, "programmer... at gmail.com"
<programmer... at gmail.com> wrote:
> On Aug 28, 9:10 am, Jimmy <mcknight0... at gmail.com> wrote:
>
> > I'm kinda newbie to python and wxPython. Now I'm confronting a thorny
> > problem: how can I make  my program minimize to the taskbar
> > represented as an ico, and when there is some message from network
> > coming, it will pop out?
>
> Warning.  I have not tested this.  I happened to have some old code
> that would iconify to the system tray.  Here's what I think you need
> to do.  (If it does not work, just yell and I'll try to hack something
> together for you.)
>
> Inside the ctor of your mainframe, you'll need to construct a
> wxTaskBarIcon (I derive from it).  This is my code that derives from
> wxTaskBarIcon.  The comments should give you a good idea of how this
> thing works.  I *think* this will shove the icon in the system tray,
> even if you're not `iconified` -- so only create it if you want to
> show up in the system tray.
>
> ## My wxTaskBarIcon derived object...
> """
> Taskbar icon.
>
> Not much functionality here, not even a menu.  In the future, this
> will be a
> good place to allow dclient functionality from the systray.
> """
>
> from wx import TaskBarIcon, EVT_TASKBAR_LEFT_DCLICK
>
> class ddTaskBarIcon(TaskBarIcon):
>     def __init__(self, icon, tooltip, frame):
>         TaskBarIcon.__init__(self)
>         self.SetIcon(icon, tooltip)
>         self.frame = frame
>
>         #
>         # At the very least, restore the frame if double clicked.  Add
> other
>         # events later.
>         #
>         self.Bind(EVT_TASKBAR_LEFT_DCLICK, self.on_left_dclick)
>
>     def on_left_dclick(self, e):
>         if self.frame.IsIconized():
>             self.frame.Iconize(False)
>         if not self.frame.IsShown():
>             self.frame.Show(True)
>         self.frame.Raise()
>
>     def CreatePopupMenu(self):
>         """
>         Override with menu functionality, later.
>         """
>         return None
>
> Next is where I use it in my wxFrame derived object.  This is the code
> in my ctor.
>     # ddTaskBarIcon is defined above...
>     self.trayicon = ddTaskBarIcon(self.frame_icon, "Dap Daemon", self)
>
>     # Handle the window being `iconized` (err minimized)
>     self.Bind(wx.EVT_ICONIZE, self.on_iconify)
>
>     # This is the event handler referenced in the ctor above
>     def on_iconify(self, e):
>         """
>         Being minimized, hide self, which removes the program from the
> taskbar.
>         """
>         self.Hide()
>
> So how does this work?  Well, the ddTaskBarIcon (err, i realize this
> is a misnomer) is constructed, which puts an icon in the system tray.
> The icon has a dbl-click event handler that will `raise` and show the
> window if necessary.
>
> The iconify event handler will hide the window if a minimize event
> occurs.  This keeps the window from showing up in the windows taskbar.
>
> Thats the magic.  YMMV.
>
> FWIW - the code I reference is over 5 years old and still runs with
> wxPython 2.8ish... Kudos to Robin Dunn and crew.  Great job.
>
> jw

I've been dinking around with getting one of my programs to minimize
to the system tray for quite a while. I could get the icon, but I
could not get an event to fire when I minimized. Thanks for the code.
Now it works.

Mike



From aleax at mac.com  Sun Aug 12 02:04:39 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 11 Aug 2007 23:04:39 -0700
Subject: LRU cache?
References: <7x8x8ixomj.fsf_-_@ruckus.brouhaha.com>
Message-ID: <1i2peoe.18eos9adkclkcN%aleax@mac.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

> Anyone got a favorite LRU cache implementation?  I see a few in google
> but none look all that good.  I just want a dictionary indexed by
> strings, that remembers the last few thousand entries I put in it.

So what's wrong with Evan Prodromou's lrucache.py module that's in pypi?
Haven't used it, but can't see anything wrong at a glance.


Alex


From cbfalconer at yahoo.com  Thu Aug 30 09:45:50 2007
From: cbfalconer at yahoo.com (CBFalconer)
Date: Thu, 30 Aug 2007 09:45:50 -0400
Subject: Important Research Project
References: <13ddcvm1bsu3s94@corp.supernews.com>
Message-ID: <46D6CA0E.E66ED5C8@yahoo.com>

"E.D.G." wrote:
> 
> This report is being posted to a number of Internet Newsgroups to
> see if there are any experienced computer programmers who would
> like to provide some assistance with an effort to develop a Perl
> language computer program.

Where is Perl described in the C standard?  This seems rather OT.

-- 
 Chuck F (cbfalconer at maineline dot net)
   Available for consulting/temporary embedded and systems.
   <http://cbfalconer.home.att.net>


-- 
Posted via a free Usenet account from http://www.teranews.com



From skawaii at gmail.com  Mon Aug 27 17:02:25 2007
From: skawaii at gmail.com (skawaii at gmail.com)
Date: Mon, 27 Aug 2007 21:02:25 -0000
Subject: Help on resizing a custom widget
In-Reply-To: <mailman.42.1188247242.28954.python-list@python.org>
References: <1188240870.457859.207670@57g2000hsv.googlegroups.com>
	<mailman.42.1188247242.28954.python-list@python.org>
Message-ID: <1188248545.231227.284760@w3g2000hsg.googlegroups.com>

On Aug 27, 4:40 pm, Phil Thompson <p... at riverbankcomputing.co.uk>
wrote:
> On Monday 27 August 2007, skaw... at gmail.com wrote:
>
> > Ok, here's what's going on. I've just created a custom widget. it
> > works great. I'm having some trouble, however, figuring out how to
> > allow the said widget to resize. For example, when I throw the widget
> > into a new dialog (using Qt Designer), I want to be able to drag it
> > larger/smaller and have widget expand/shrink to that size. Right now,
> > I can drag the widget bigger/smaller all I want, but it doesn't
> > actually change size.
>
> > I'm pretty new to PyQt (and therefore, Qt), so I'm pretty sure that
> > the answer is a property that needs to be set somewhere. I'm just not
> > sure which one. So you know, I'm using Python 2.4.3 and PyQt 3.1.6.
>
> > Any help and suggestions would be appreciated. Thanks.
>
> Probably best to start with the following...
>
> http://doc.trolltech.com/4.3.0/layout.html#custom-widgets-in-layouts
>
> Phil

Thanks for pointing me in the right direction. I'll take a look at it.



From wpdster at gmail.com  Tue Aug  7 10:38:32 2007
From: wpdster at gmail.com (Patrick Doyle)
Date: Tue, 7 Aug 2007 10:38:32 -0400
Subject: Importing * From a Package
In-Reply-To: <Xns9985967E56158duncanbooth@127.0.0.1>
References: <e2a1d0aa0708060706p1f50d5c1j93b6cc3679522597@mail.gmail.com>
	<20070806143253.4947.1097304571.divmod.quotient.19513@ohm>
	<mailman.1712.1186492584.22759.python-list@python.org>
	<Xns9985967E56158duncanbooth@127.0.0.1>
Message-ID: <e2a1d0aa0708070738n60f61716r61466f4847b7c906@mail.gmail.com>

On 7 Aug 2007 13:54:21 GMT, Duncan Booth <duncan.booth at invalid.invalid> wrote:
> "Patrick Doyle" <wpdster at gmail.com> wrote:
>
> > Why does Python include the submodules that were explicitly loaded by
> > previous imports?  Does it go out of it's way to do so?  If so, why?
> > What purpose does it serve?  Or, is it a natural fallout of the manner
> > in which imports are processed?  If so, could somebody guide my
> > intuition as to why this would be such a natural fallout?
> >
>
> It is a natural fallout of the manner in which imports are processed.
> When you explicitly load a submodule a reference to the submodule is
> stored in the parent module. When you do 'from module import *' and the
> imported module doesn't define __all__, you create a reference in the
> current module to everything referenced by the imported module (except
> for variables beginning with '_').
>
Ahhh, I see it now
>>> import SDRGen
>>> dir()
['SDRGen', '__builtins__', '__doc__', '__name__']

>>> dir(SDRGen)
['__builtins__', '__doc__', '__file__', '__name__', '__path__']

>>> from SDRGen import *
>>> dir()
['SDRGen', '__builtins__', '__doc__', '__name__']
>>> dir(SDRGen)
['__builtins__', '__doc__', '__file__', '__name__', '__path__']
(notice, no changes)

>>> from SDRGen.TFGenerator import TFGenerator
>>> dir()
['SDRGen', 'TFGenerator', '__builtins__', '__doc__', '__name__']
>>> TFGenerator
<class SDRGen.TFGenerator.TFGenerator at 0xb7ee80ec>
(as expected)

>>> dir(SDRGen)
['TFGenerator', '__builtins__', '__doc__', '__file__', '__name__', '__path__']
>>> SDRGen.TFGenerator
<module 'SDRGen.TFGenerator' from 'SDRGen/TFGenerator.pyc'>

and that's what led to my confusion... when my script later did a
>>> from SDRGen import *

The 'TFGenerator' name got changed from a reference to the
'TFGenerator' class to a reference to the 'SDRGen.TFGenerator' module.

and now it makes sense.

Thanks.

--wpd


From ldo at geek-central.gen.new_zealand  Thu Aug 30 22:36:01 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 31 Aug 2007 14:36:01 +1200
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au>
Message-ID: <fb7uls$s8c$3@lust.ihug.co.nz>

In message <87hcmhebwv.fsf at benfinney.id.au>, Ben Finney wrote:

> zzbbaadd at aol.com writes:
> 
>> What's with the index() function of lists throwing an exception on not
>> found?
> 
> It's letting you know that the item isn't in the list. There's no
> sensible return value from an "index" function in that condition.

How about returning None? That's what's already done by the dict.get method
by default.


From hugh_jmptn at yahoo.com  Fri Aug 31 15:27:24 2007
From: hugh_jmptn at yahoo.com (Hugh Jampton)
Date: Fri, 31 Aug 2007 12:27:24 -0700
Subject: Horace Lives!
Message-ID: <1188588444.816874.22000@r29g2000hsg.googlegroups.com>

http://horace-vitreouschina.blogspot.com/



From duprez at hinet.net.au  Mon Aug 27 02:05:30 2007
From: duprez at hinet.net.au (Mick Duprez)
Date: Sun, 26 Aug 2007 23:05:30 -0700
Subject: Error with Simplemapi.py
In-Reply-To: <mailman.14.1188187230.28954.python-list@python.org>
References: <1187938985.165186.300780@i38g2000prf.googlegroups.com>
	<mailman.14.1188187230.28954.python-list@python.org>
Message-ID: <1188194730.024877.120880@q5g2000prf.googlegroups.com>

On Aug 27, 2:00 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Fri, 24 Aug 2007 04:03:05 -0300, Mick Duprez <dup... at hinet.net.au>
> escribi?:
>
> > I have a small problem. I get an error I don't know how to resolve,
> > any help would be much appreciated.
> > I'm using Python25 on winXP pro and the script from the link above.
> > Here's the error -
>
> >>>> mailtest.SendMail('no... at somewhere.net','test','test
> >>>> string','c:\dbs.txt')
>
> That should be 'c:\\dbs.txt' or r'c:\dbs.txt'
>
> > Traceback (most recent call last):
> >   File "<pyshell#10>", line 1, in <module>
> >     mailtest.SendMail('no... at somewhere.net','test','test string','c:
> > \dbs.txt')
> >   File "C:\Python25\mailtest.py", line 135, in SendMail
> >     cast(NULL, lpMapiRecipDesc), RecipCnt, recip,
> >   File "C:\Python25\lib\ctypes\__init__.py", line 478, in cast
> >     return _cast(obj, obj, typ)
> > ArgumentError: argument 1: <type 'exceptions.TypeError'>: wrong type
>
> I'm unsure what those cast(NULL, ...) are supposed to do, but they look
> all wrong. NULL, as defined on that script, is *not* a C NULL pointer (use
> None for that).
> (In fact the whole script doesn't look well at all - do you *have* to use
> MAPI? can't use SMTP instead? Even if you must use MAPI, try the pywin32
> package from Mark Hammond, it has MAPI support and a demo script for
> sending mail)
>
> > I have had a brief look at the C api for these structs and functions
> > but I can't resolve it, it is probably something simple.
> > The piece of code I don't understand though is this -
>
> > MapiRecipDesc_A = MapiRecipDesc * len(RecipWork) #size of struct??
>
> This declares a new type, an array of len(RecipWork) items, each of type
> MapiRecipDesc
>
> > rda = MapiRecipDesc_A() # isn't it MapiRecipDesc as declared??
>
> This creates an instance of the above array.
>
> --
> Gabriel Genellina

Thank you very much Gabriel, changing the NULL to None did the trick
(it also helps if I reload the changed module after editing!:( ). Yes
that is an old script and I will look into your suggestions. Basically
I'd just like to use the default mail client (windows or Unix/Linux)
to send simple mail with attachments, this way I can log the
attachments I send to a db for example for document transmittal/
register reports etc.
Thanks also for the code explanations,
Cheers,
Mick.



From steveo at syslang.net  Wed Aug 22 15:10:54 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Wed, 22 Aug 2007 15:10:54 -0400 (EDT)
Subject: Redo: How to create a function dynamically.
Message-ID: <alpine.LFD.0.999.0708221503280.5422@saturn.syslang.net>

I have this which works:

#! /usr/bin/python
strfunc = """
def foo( a ):
     print 'a = ', a
"""
exec strfunc
globals()['foo'] = foo
foo( 'Hello' )

and this which does not:

#! /usr/bin/python
import new
strfunc = """
def foo( a ):
     print 'a = ', a
"""
co = compile ( strfunc, '', 'exec' )
exec co
nfunc = new.function( co, globals(), 'foo' )
globals()['foo'] = nfunc
foo( 'Hello' )

When I try to run this one I get:
Traceback (most recent call last):
   File "./m2.py", line 13, in ?
     foo( 'Hello' )
TypeError: ?() takes no arguments (1 given)


I need the second case to work because I want to be able to end up with a 
function in a seperate module to do the work of function creation. The 
caller will pass in globals() so that the resulting function will end up 
in the directory?/dictionary? of that caller.

[And my apologies for overcomplicating the question on my first try.]

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From cdleary at gmail.com  Thu Aug  2 10:36:05 2007
From: cdleary at gmail.com (cdleary at gmail.com)
Date: Thu, 02 Aug 2007 14:36:05 -0000
Subject: Case study: library class inheritance with property declarations
In-Reply-To: <1186063694.311416.133390@i13g2000prf.googlegroups.com>
References: <1186062582.975223.230270@g12g2000prg.googlegroups.com>
	<1186063694.311416.133390@i13g2000prf.googlegroups.com>
Message-ID: <1186065365.546545.184840@i13g2000prf.googlegroups.com>

On Aug 2, 7:08 am, cdle... at gmail.com wrote:
> On Aug 2, 6:49 am, cdle... at gmail.com wrote:
>
>
>
> > Hi all,
>
> > It's possible that I'm missing the obvious -- I've been up for over 24
> > hours and I'm most likely dehydrated from mass coffee intake, but I
> > figure many people in similar circumstances will be searching
> > comp.lang.python one day, so here goes!
>
> > class LibraryClass(object):
>
> >     """
> >     A class whose implementation is out of my hands.
> >     """
>
> >     def __init__(self):
> >         """
> >         Follows good dynamic-language form and binds all instance
> >         variables at initialization time.
> >         """
> >         # Omitted: complex initialization functionality.
> >         self.useful_attr = None
>
> > class MyInheritedClass(LibraryClass):
>
> >     """
> >     My refinement of the functionality offered by the LibraryClass. I
> >     now want the instance to initialize with a reference to an
> > external
> >     object, and the useful_attr defined in the superclass will now
> >     reference an attribute of that external object via fget.
>
> >     Changing the attribute of the external object has undefined
> >     behavior, so I want to omit an fset in the property declaration;
> >     however, I have to provide some way for the superclass to
> >     initialize useful_attr -- I can't change the superclass' code, as
> > it
> >     resides in a library that is out of my hands.
> >     """
>
> >     def __init__(self, external_obj):
> >         LibraryClass.__init__(self)
> >         self._external_obj = external_obj
>
> >     def get_useful_attr(self):
> >         return self._external_obj.proxy_useful_attr
>
> >     useful_attr = property(fget=get_useful_attr)
>
> > def test():
> >     class _Fake(object):
> >         pass
> >     external_obj = _Fake()
> >     external_obj.proxy_useful_attr = 12
> >     spam = MyInheritedClass(external_obj)
>
> > if __name__ == '__main__':
> >     test()
> > EOF
>
> > If you're one of those people who doesn't like laboriously reading
> > contrived examples (elitists ;) I'll boil it down for you: Library
> > class initializes some attribute, but derived class wants to eliminate
> > fsets for said attribute. As a result, our ideal solution
>
> > Of course, this means that the derived class will raise an error in
> > some circumstances where the base class wouldn't (when you're setting
> > that attribute), but one can assume that the inheritance is
> > worthwhile.
>
> > How do I come up with silly solutions to circumvent this? Let me count
> > the ways...
>
> > 1. So-and-so: make an fset that does nothing. This ignores (what
> > should be) errors in code that uses MyInheritedClass in an attempt to
> > accommodate a useless statement in the base class -- surely non-ideal.
> > 2. The ugly one: since you can probably view the library, copy and
> > paste the complex initialization functionality in the above, but leave
> > out the bad statement. This not only forfeits the ideals of
> > inheritance, but makes you totally incompatible with future library
> > changes.
> > 3. Cheerleader: Pure evil. On top of the ugliness of 2, you assume
> > that across library revisions the indenting won't change and that the
> > troublesome statement will remain on the same line, and pull off one
> > of these babies:
>
> > def super_evil_test():
> >     from inspect import getsourcelines
> >     exec(''.join([line[4:] for line in
> >                   getsourcelines(LibraryClass.__init__)[0][:-1]]))
> >     LibraryClass.__init__ = __init__
> >     test() # Passes, but several angels no longer get their wings
>
> > Totally kidding, everybody! I hope Guido doesn't read this thread...
>
> > And this concludes the sleep deprived rambling that follows the
> > somewhat interesting case in point. Thoughts?
>
> I'm sorry -- the solution was not /enough/ coffee. Got another cup and
> sat down with the type/class unification doc, and found this thought-
> stimulating portion:
>
> http://www.python.org/download/releases/2.2/descrintro/#property
> If you want to override the __get__ operation for properties when used
> as a class attribute, you can subclass property - it is a new-style
> type itself - to extend its __get__ method, or you can define a
> descriptor type from scratch by creating a new-style class that
> defines __get__, __set__ and __delete__ methods.
> ...
> The get method won't be called when the property is accessed as a
> class attribute (C.x) instead of as an instance attribute (C().x).
>
> Seeing as how property is just a wrapper class, we don't need to
> declare it in the class body, though it /is/ the convention and the
> way it's done in all the docs I've seen. We fix our inherited class to
> be the following:
>
> [snip]
> class MyInheritedClass(LibraryClass):
>
>     """
>     My refinement of the functionality offered by the LibraryClass. I
>     now want the instance to initialize with a reference to an
> external
>     object, and the useful_attr defined in the superclass will now
>     reference an attribute of that external object via fget.
>
>     Changing the attribute of the external object has undefined
>     behavior, so I want to omit an fset in the property declaration;
>     however, I have to provide some way for the superclass to
>     initialize useful_attr -- I can't change the superclass' code, as
> it
>     resides in a library that is out of my hands.
>     """
>
>     def __init__(self, external_obj):
>         LibraryClass.__init__(self)
>         self.useful_attr = property(fget=self.get_useful_attr)
>         self._external_obj = external_obj
>
>     def get_useful_attr(self):
>         return self._external_obj.proxy_useful_attr
> [snip]
>
> And it tests like a charm.

Last post -- I swear.

I failed to realize that it's all part of an extremely well defined
attribute resolution protocol, and handled via the descriptor
specification. Discussing descriptors was on the TODO list for the
type/class unification document, but there's a very fulfilling
explanation by Raymond Hettinger: http://users.rcn.com/python/download/Descriptor.htm
Also, the official doc is here: http://docs.python.org/ref/descriptors.html

Maybe the documentation for the property builtin should make reference
to the descriptor specification? If nobody thinks this is silly, I'll
submit a documentation patch in a few days.

Sorry for the spam -- hope someone besides me learns from it!

- Chris



From llasram at gmail.com  Wed Aug 15 15:14:23 2007
From: llasram at gmail.com (Marshall T. Vandegrift)
Date: Wed, 15 Aug 2007 15:14:23 -0400
Subject: encrypting files + filestreams?
References: <1187186797.579680.206820@19g2000hsx.googlegroups.com>
Message-ID: <87absspq40.fsf@seneca.iss.local>

per9000 <per9000 at gmail.com> writes:

> I am trying to figure out the best way to encrypt files in python.

Looking at your code and questions, you probably want to pick up a
cryptography handbook of some sort (I'd recommend /Practical
Cryptography/) and give it a read.

> But I have some thoughts about it. By pure luck (?) this file happened
> to be N*512 bytes long so I do not have to add crap at the end - but
> on files of the size N*512 + M (M != 521) I will add some crap to make
> it fit in the algorithm.

BTW, AES has a block size of 16, not 512.

> When I later decrypt I will have the stuff I do not want. How do
> people solve this? (By writing the number of relevant bytes in
> readable text in the beginning of the file?)

There are three basic ways of solving the problem with block ciphers.
Like you suggest, you can somehow store the actual size of the encrypted
data.  The second option is to store the number of padding bytes
appended to the end of the data.  The third is to use the block cipher
in cipher feedback (CFB) or output feedback (OFB) modes, both of which
transform the block cipher into a stream cipher.  The simplest choice
coding-wise is to just use CFB mode, but the "best" choice depends upon
the requirements of your project.

> Also I wonder if this can be solved with filestreams (Are there
> streams in python? The only python file streams I found in the evil
> search engine was stuff in other forums.)

Try looking for information on "file-like objects."  Depending on the
needs of your application, one general solution would be to implement a
file-like object which decorates another file-like object with
encryption on its IO operations.

>     crptz = AES.new("my-secret_passwd")

I realize this is just toy code, but this is almost certainly not what
you want:

  - You'll get a much higher quality key -- and allow arbitrary length
    passphrases -- by producing the key from the passphrase instead of
    using it directly as the key.  For example, taking the SHA-256 hash
    of the passphrase will produce a much higher entropy key of the
    correct size for AES.

  - Instantiating the cipher without specifying a mode and
    initialization vector will cause the resulting cipher object to use
    ECB (electronic codebook) mode.  This causes each identical block in
    the input stream to result in an identical block in the output
    stream, which opens the door for all sorts of attacks.

Hope this helps!

-Marshall



From stateroad at gmail.com  Mon Aug 27 15:02:14 2007
From: stateroad at gmail.com (Nicholas Amorim)
Date: Mon, 27 Aug 2007 16:02:14 -0300
Subject: Image.open( "C:\test.jpg") is this wrong ?
In-Reply-To: <9afea2ac0708270941u2c9dad3eyb9877de04e76d6f7@mail.gmail.com>
References: <CEFAE560FE3E3C458A2335A1AA37A82D06763937@MAIL2W2K3.WarrenNT.SaintFrancis.Loc>
	<W82330649.363.70826.1@mxextra>
	<9afea2ac0708270941u2c9dad3eyb9877de04e76d6f7@mail.gmail.com>
Message-ID: <7c1ab7e20708271202k21d34ecbl133391518392ec5d@mail.gmail.com>

Ah....

"My problem is that I don't know what my active directory is so I am putting
an absolute path name in quotes."

import os

os.getcwd() # it returns your current directory
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From lucaberto at libero.it  Fri Aug 24 10:29:05 2007
From: lucaberto at libero.it (luca72)
Date: Fri, 24 Aug 2007 07:29:05 -0700
Subject: csv module
Message-ID: <1187965745.959855.95530@q3g2000prf.googlegroups.com>

Hello at all i have a problem with the csv module, really i don't
undestud the writerows:

if i have to write only one row i do as follow:
def scrivo_csv(self):
        import csv
        q_righe = self.tableWidget.rowCount()
        for row in range(q_righe) :
            e_vuota = self.tableWidget.item(row, 5)
            if e_vuota == None :
                ultima = row
                break
        writerdocs = open("some.csv", "wb")
        scritt = csv.writer(writerdocs, delimiter='|')
        q_colonne = self.tableWidget.columnCount()
        ss = 0
        while ss < row :
            riga = []
            for val in range(q_colonne):
                esiste = self.tableWidget.item(ss, val)
                if esiste == None :
                    luca = ''
                else :
                    luca = str(QtGui.QTableWidgetItem.text(esiste))
                riga.append(luca)
            scritt.writerow(riga)
            ss+=1
This work only with one row in the tablewidget, but if i have more
than one row how i have to proceed?

Thanks for the help

Luca



From stef.mientki at gmail.com  Mon Aug 13 20:14:04 2007
From: stef.mientki at gmail.com (stef mientki)
Date: Tue, 14 Aug 2007 02:14:04 +0200
Subject: import * is not allowed ??
Message-ID: <46C0F3CC.1050704@gmail.com>

hello,

can anyone explain a little bit more what this error message means:

  import * is not allowed in function 'JAL_MAIN_RUN' because it contains 
a nested function with free variables (JAL_simulation_file.py, line 22)

what are "free variables" ?

thanks,
Stef Mientki



From robert.rawlins at thinkbluemedia.co.uk  Fri Aug  3 09:38:17 2007
From: robert.rawlins at thinkbluemedia.co.uk (Robert Rawlins - Think Blue)
Date: Fri, 3 Aug 2007 14:38:17 +0100
Subject: File Handling & TRY/EXCEPT
In-Reply-To: <f8va2a$8od$1@sea.gmane.org>
References: <33119.3366124809$1186129744@news.gmane.org>
	<f8va2a$8od$1@sea.gmane.org>
Message-ID: <00e001c7d5d3$8edafb00$ac90f100$@rawlins@thinkbluemedia.co.uk>

Thanks for your ideas guys,

I'm unfortunately tied to 2.4 so don't have the full try except status, but
I'm now working with the following code:

	def addApp(self, event):
		try:
			logfile =
open('/pblue/new/Logs/Application.csv','a')

			now = datetime.datetime.now()
			logstring = '%s,%s \n' % (event, str(now))
			
			try:				
				logfile.write(logstring)
			finally:
				logfile.close()
		except:
			self.addApp(event)

I'm trying to slowly debug my app and get rid of all the memory leaks, but
its pain staking work, any help you can offer on that stuff would be a god
send, I'm a little reluctant about posting all my app code on the lists as
I'd like to keep some of it private.

How does that new version look? A little tidier?

Thanks guys,

Rob

-----Original Message-----
From: python-list-bounces+robert.rawlins=thinkbluemedia.co.uk at python.org
[mailto:python-list-bounces+robert.rawlins=thinkbluemedia.co.uk at python.org]
On Behalf Of Steve Holden
Sent: 03 August 2007 14:20
To: python-list at python.org
Subject: Re: File Handling & TRY/EXCEPT

Robert Rawlins - Think Blue wrote:
> Hello Guys,
> 
>  
> 
> I'm looking for some advice on how best to handle file read/write errors 
> with try/except as i'm a little vague on this, I have a small memory 
> leak in my app and I'm starting to think its generated by my log file 
> write. For an example of the function look below.
> 
>  
> 
>        def addAppLog(self, event):
>               try:
>                      logfile = open('/pblue/new/Logs/Application.csv','a')
>                      now = datetime.datetime.now()
>                      logstring = '%s,%s \n' % (event, str(now))
>                      logfile.write(logstring)
>               except:
>                      self.addAppLog(event)
> 
It seems somewhat perverse, when the logging code raises an exception, 
to recursively log - presumably the same exception will be raised again?

>               else:
> 
>                      logfile.close()
> 
Remember that in 2.5 you can use try ... except ... finally

> 
> Now I'm looking for some help to sort this out as I'm sure it's pretty 
> untidy, I want to make it as air tight as possible. The basic concept 
> was that if it tries writing to the log file and it fails, then it needs 
> to reattempt it, right?
> 
Wrong. The one thing you can't log is a logging attempt error!
>  
> 
> What's the best way to handle this to ensure that there are not any 
> memory leaks caused when the file is open() but not followed by a 
> close(). I'm running 2.4 and I know some of these newer versions don't 
> need you to explicitly close() the file objects, but I would certainly 
> feel a lot better.
> 
>  
> 
> Any advice?
> 
This is just a quick on-the-fly look at what you did, I am sure you will 
receive other,  probably more helpful, comments.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------

-- 
http://mail.python.org/mailman/listinfo/python-list



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug 30 07:17:11 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 30 Aug 2007 13:17:11 +0200
Subject: Python doesn't see the directories I create
In-Reply-To: <mailman.133.1188471584.28954.python-list@python.org>
References: <ldvBi.293202$LE1.92748@newsfe13.lga>	<46d6856b$0$17674$426a74cc@news.free.fr>
	<mailman.133.1188471584.28954.python-list@python.org>
Message-ID: <46d6a72c$0$20532$426a74cc@news.free.fr>

Steve Holden a ?crit :
> Bruno Desthuilliers wrote:
(snip)
>> You can avoid all escaping by using raw strings:
>>
>> mypath = r"C:\enhancement\rawfiles\"
>>
> Please note that the above is a well-known syntax error. A string 
> literal cannot end with a single backslash, as it escapes the closing 
> quote.

oops ! My bad :(
Thanks for the correction...

(snip)
>> Also and IIRC, using slash instead should also work, ie:
>>
>> mypath = r"C:/enhancement/rawfiles/"
>>
> That does indeed work in most situations, but ideally (i.e. for maximum 
> code portability) paths should be constructed using os.path.join(), or 
> collected from the environment somehow.

Indeed. But I doubt a path starting with 'C:' will work fine on a 
unix-like environment anyway !-)


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  2 04:38:58 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 02 Aug 2007 10:38:58 +0200
Subject: a dict trick
In-Reply-To: <1186036331.304916.304020@e9g2000prf.googlegroups.com>
References: <1186036331.304916.304020@e9g2000prf.googlegroups.com>
Message-ID: <46b19822$0$25348$426a74cc@news.free.fr>

james_027 a ?crit :
> hi
> 
> for example I have this dictionary
> 
> dict = {'name':'james', 'language':'english'}
> 
> value = 'sex' in dict and dict['sex'] or 'unknown'
> 
> is a right pythonic of doing this one?

No. The first problem is that using 'dict' as an identifier, you're 
shadowing the builtin dict type. The second problem is that you're 
reinventing the square wheel.

> I am trying to get a value from
> the dict, but if the key doesn't exist I will provide one.

d = {'name':'james', 'language':'english'}
d.get('sex', 'unknown')



From jeremy+complangpython at jeremysanders.net  Fri Aug 17 15:39:45 2007
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Fri, 17 Aug 2007 20:39:45 +0100
Subject: best GUI library for vector drawing program
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
	<fa4h5t$ort$1@gemini.csx.cam.ac.uk>
	<1187370262.861439.259680@q3g2000prf.googlegroups.com>
Message-ID: <fa4ti1$ivs$1@gemini.csx.cam.ac.uk>

chewie54 wrote:

> I looked at your application, Veusz (it looks very nice),  and I see
> you have binary distrubitions
> for each os.  Is is difficult to build these binaries for each
> system.  Could
> you tell me how that is done?

I use pyinstaller to make the binaries (see the veusz_pyinst.spec file), and
NSIS to make a Windows installer from the Windows binary (see veusz.nsi).

The Linux binary, unfortunately, isn't 100% compatible, as I've found trying
to run on 64 bit systems. I assume it's some sort of glibc mismatch. Making
the linux binaries on an old distribution helps the compatibility (I use
centos 3 in a virtual environment).

jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From grante at visi.com  Fri Aug 24 11:30:01 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 24 Aug 2007 15:30:01 -0000
Subject: Socket recv(1) seems to block instead of returning end of file.
References: <mailman.164.1187862959.32294.python-list@python.org>
	<13cr4u8mimniub4@corp.supernews.com>
	<mailman.250.1187966846.32294.python-list@python.org>
Message-ID: <13ctubpc2je3ue0@corp.supernews.com>

On 2007-08-24, Hendrik van Rooyen <mail at microcorp.co.za> wrote:
> "Grant Edwards" <gr....com> wrote:
>
>> On 2007-08-23, Hendrik van Rooyen <m....ocorp.co.za> wrote:
>> 
>> > While doing a netstring implementation I noticed that if you
>> > build a record up using socket's recv(1), then when you close
>> > the remote end down, the recv(1) hangs,
>> 
>> I don't see that behavior running 2.4 on Gentoo.
>
> I express myself badly - when I say "close down" I don't mean
> "close down as in socket.close" I mean "close down as in click on the
> tkinter window, or with keyboard interrupt" - sorry for the confusion

A FIN is a FIN is a FIN.  It shouldn't matter whether the app
called close() or the c library called close() or the OS called
close().

>> > despite having a short time out of 0.1 set.
>> 
>> What time out?  A socket's recv method doesn't do timeouts.
>
> If I set a time out, then the recv does not block,
> but gives me a timed out exception.

My aplogies -- my question was prompted by my ignorance of the
fact that a timeout feature had been added to the socket module
since the last time I worked on it.

> I am now frustrated - its not as simple as I thought - my
> application still only detects EOF if I do more than recv(1),
> but I cannot demonstrate simply - anyway, I have modified your
> code to look more like my program's code, and it follows below
> - if it does nothing else, it should convince you that recv()
> *does* time out...

Yes.

> The receiver code below detects if I close the sending console window, 
> as well as control-c - Rats!

Same here.

-- 
Grant Edwards                   grante             Yow! Am I having fun yet?
                                  at               
                               visi.com            


From S.Mientki-nospam at mailbox.kun.nl  Fri Aug  3 05:45:17 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Fri, 03 Aug 2007 11:45:17 +0200
Subject: (no) fast boolean evaluation ? missing  NOT
In-Reply-To: <1186096979.397596.36640@e16g2000pri.googlegroups.com>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<mailman.1545.1186095368.22759.python-list@python.org>
	<1186096979.397596.36640@e16g2000pri.googlegroups.com>
Message-ID: <eb4fb$46b2f7a6$d443bb3a$21643@news.speedlinq.nl>

John Machin wrote:
> On Aug 3, 8:55 am, Ian Clark <icl... at mail.ewu.edu> wrote:
>> Stef Mientki wrote:
>>> hello,
>>> I discovered that boolean evaluation in Python is done "fast"
>>> (as soon as the condition is ok, the rest of the expression is ignored).
>>> Is this standard behavior or is there a compiler switch to turn it on/off ?
>>> thanks,
>>> Stef Mientki
>> It's called short circuit evaluation and as far as I know it's standard
>> in most all languages. This only occurs if a conditional evaluates to
>> True and the only other operators that still need to be evaluated are
>> 'or's or the condition evaluates to False and all the other operators
>> are 'and's. The reason is those other operators will never change the
>> outcome: True or'd with any number of False's will still be True and
>> False and'ed to any number of Trues will still be False.
>>
>> My question would be why would you *not* want this?
>>
>>
> 
> Why? Perhaps under some compound condition like this:
> 
> (you_are_confused and/or
> function_returns_bool_but_has__side_effects())
> 

Thanks guys,
Yes this is exactly what's going wrong ...

Sorry, my question missed the essential "NOT",
here is an example, that behaves different in Delphi,
(so I guess Delphi is not a real language ;-)

<Python>
def Some_Function (const):
     print 'Ive been here', const
     return True

A = True

if A and Some_Function (4 ):
     print 'I knew it was True'
else:
     print 'I''ll never print this'
</Python>

<Output>
Ive been here 4
I knew it was True
</Output

I was expected that the function would not be called,
because A is True.

And I agree with Laurent that it should be better to write a clean code,
so it doesn't matter whether you write in Python or in Delphi.

Gabriel: you pointed me to this page:
The exact behavior is defined in the Language Reference <http://docs.python.org/ref/Booleans.html>

<quote>
or_test  	::=  	and_test | or_test "or" and_test
</quote

Can you imagine, while I'm not a programmer, just a human,
that I don't understand one bit of this line.

So now I'm left with just one question:
for bitwise operations I should use &, |, ^
for boolean operations I should use and, or, xor
but after doing some test I find strange effects:
 >>> A = 4
 >>> B = 5
 >>> A and B
5
 >>> A & B
4
 >>> A or B
4
 >>> A | B
5

So if I use the bitwise operation on integers,
   "and" changes into (bitwise) "or" and vise versa.

Is there some way to prevent / detect these kind of errors
( as I'm building a micro-controller simulator in Python,
I need both logical and bitwise operators very frequently).

cheers,
Stef Mientki




From erik at myemma.com  Tue Aug 28 18:30:47 2007
From: erik at myemma.com (Erik Jones)
Date: Tue, 28 Aug 2007 17:30:47 -0500
Subject: Haskell like (c:cs) syntax
In-Reply-To: <4866bea60708281512q31635803x1b025274c94caf7e@mail.gmail.com>
References: <fb25uh$gl9$1@online.de>
	<4866bea60708281512q31635803x1b025274c94caf7e@mail.gmail.com>
Message-ID: <16C5BEC8-3D8E-494D-B96F-04286A93EDBC@myemma.com>


On Aug 28, 2007, at 5:12 PM, Chris Mellon wrote:

> On 8/28/07, Stefan Niemann <stefan at 3niemann.de> wrote:
>> Hi,
>>
>> sorry that I'm relatively new to Python. But the syntax and  
>> semantics of
>> Python already fascinate me, because I'm familiar with functional  
>> languages
>> like Haskell.
>>
>> Is there a pattern matching construct in Python like (head :  
>> tail), meaning
>> 'head' matches the first element of a list and 'tail' matches the  
>> rest? I
>> could not find this in the Python documentation.
>>
>> Regards,
>> Stefan
>>
>>
>
> Python does not have haskell like pattern matching. Things are written
> and done in a different way.
>
> When working with lists, Python has a slice syntax (which is rather
> more powerful than Haskells limited head->tail linked list syntax)
> that you can use to chop a sequence up into various parts.

That is extremely arguable (in fact, Haskell's list semantics are  
extremely powerful as they are not limited to just head/tail).  But,  
rather than debate the merits of one language over the other, to the  
OP:  no, Python doesn't have any pattern matching facilities.   
Binding statements must be explicit, so you could do something along  
the lines of (using parallel assignment):

head, tail = l[0], l[1:]

or,

front, last = l[:len(l) - 1], l[len(l) - 1]

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From deets at nospam.web.de  Fri Aug 24 09:41:54 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 24 Aug 2007 15:41:54 +0200
Subject: Unequal Length Maze
In-Reply-To: <1187941996.333191.323540@z24g2000prh.googlegroups.com>
References: <1187941996.333191.323540@z24g2000prh.googlegroups.com>
Message-ID: <5j85h5F3t20idU1@mid.uni-berlin.de>

tomtim20 at gmail.com schrieb:
> Hi All,
> what's the best algorithm to solve such problem ?
> http://www.stetson.edu/~efriedma/unequal/
> 
> I will really appreciate some pieces of code (python).

If you pay me 100$ (really a bargain), you get a solution in python.

Diez


From jensthiede at gmail.com  Sat Aug 11 08:33:33 2007
From: jensthiede at gmail.com (Jens Thiede)
Date: Sat, 11 Aug 2007 05:33:33 -0700
Subject: Metaclass v.s. Property function.
Message-ID: <1186835613.178733.81210@q75g2000hsh.googlegroups.com>

I don't like the property function, usable in the new-style classes,
because having to remember to manage a list of "foo = property(...)"
assignments just plain sucks, so I wrote a metaclass that does things
a little differently. Please have a look and tell me whether this is
useful or impractical. The metaclass is here: http://pastebin.com/m5b06b571
and some simple testcode is here: http://pastebin.com/m382f2ae9.
Notice the first line though.

Thanks for any replies,

Jens Thiede.



From steve at holdenweb.com  Thu Aug 16 20:40:10 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Aug 2007 20:40:10 -0400
Subject: Pass by reference or by value?
In-Reply-To: <200708170120.07645.thomas@jollans.com>
References: <496954360708161402x58faba47x7a6eae6e68f81d4@mail.gmail.com>
	<200708170120.07645.thomas@jollans.com>
Message-ID: <fa2qp6$qug$1@sea.gmane.org>

Thomas Jollans wrote:
> On Thursday 16 August 2007, Robert Dailey wrote:
>> Hi,
>>
>> I previously created a topic named "Pass by reference or by value" where I
>> inquired on how python's function parameters work. I received a lot of nice
>> responses, however I'm still confused on the topic. Note that I come from a
>> C++ background to Python, so any comparisons to C++ would be very helpful.
> 
> Very short answer:
> 
> Think of normal objects as always-pointers. There are no references. param = 5 
> sets the local variable "param" (be that of imaginary type int* or int, I 
> don't care) to whatever 5 is. This does not call an operator=, this plain 
> overwrites the variable.
> 
On the contrary, objects in Python are very strictly typed, and your 
thinking is a little sloppy. All names and container items are 
references. The local variable "param" doesn't *have* a type, and can be 
a reference to a value of any type.

You are right in saying that assignment isn't an operator in the 
classical sense, but don't forget that its use with qualified names 
(e.g. thing.attr = value) can result in calls to __setattr__(), which 
can be overridden under suitable circumstances.

> If you want to change arguments in that way, you can use a list as an ugly 
> hack:
> 
> def foo(param):
> 	param[0] = 5
> 	print param[0]
> 
> a = [4]
> 
> foo(a)
> 
> yeah, I said ugly. That hack makes sure that a method of the passed object is 
> called instead of of the local namespace dict. (please note that I'm throwing 
> around abstract concepts without caring about an implementation).
> 
> 
Well please stop. Some of them are bound to fall, and if you damage them 
the PSF will have to make you pay for them. Abstract concepts don't grow 
on trees, you know ;-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From zyzhu2000 at gmail.com  Wed Aug  1 09:57:36 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Wed, 01 Aug 2007 13:57:36 -0000
Subject: Python end of file marker similar to perl's __END__
In-Reply-To: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
Message-ID: <1185976656.753817.27980@x40g2000prg.googlegroups.com>

On Jul 31, 10:53 pm, beginner <zyzhu2... at gmail.com> wrote:
> Hi All,
>
> This is just a very simple question about a python trick.
>
> In perl, I can write __END__ in a file and the perl interpreter will
> ignore everything below that line. This is very handy when testing my
> program. Does python have something similar?
>
> Thanks,
> Geoffrey

Thanks everyone for responding. It doesn't look like python has it. I
would definitely miss it. As Steve said, the nice thing about __END__
is that things below __END__ do not have to have legit syntax. That
let me focus on the lines of code I am debugging and do not have to
worry about some bad syntax down the line. This feature is especially
handy if I am, saying, replacing modoules or changing data structures.




From tavares at fe.up.pt  Thu Aug  2 09:33:51 2007
From: tavares at fe.up.pt (tavares at fe.up.pt)
Date: Thu, 02 Aug 2007 06:33:51 -0700
Subject: IWCIA 08 - USA, 7-9 April 2008: Invitation
Message-ID: <1186061631.031381.222330@22g2000hsm.googlegroups.com>

Dear Colleague,

I would like to bring to your attention information about a
forthcoming conference and to strongly encourage you to submit a paper
or papers to it.

This is the 12th International Workshop on Combinatorial Image
Analysis (IWCIA 08) which will take place in Buffalo, USA, 7-9 April
2008. Comprehensive information about the conference is available at
its website http://www.cs.fredonia.edu/iwcia08 (or google IWCIA 08).
>From there you will see that IWCIA 08 will be a very top conference,
with distinguished keynote speakers (one of them a Nobel Laureate, the
other four are of the highest possible rank and recognition as well).
The proceedings will be published by Springer (LNCS) and by Taylor and
Francis (for submissions to the Special Track on Applications). The
extended versions of the best papers will be published in special
issues of Pattern Recognition, Elsevier (for theoretical papers) and
in the International Journal of Imaging Systems and Technology, Wiley
(for papers of the Special Track on Applications).

I am involved in the organization of the Special Track on Applications
of IWCIA 08, and can assure you that it will provide the authors with
an exceptional opportunity to present their work and publish it by a
reputable publisher and possibly in a journal (indexed by Science
Citation Index Expanded and several other indexes), to discuss topics
of common interest with scientists from all over the world as well as
with representatives of the industry from the US and possibly other
countries.

Having in mind the area of your research and experience, I would like
to invite you to submit a paper (or papers) to IWCIA 08 and especially
to its Special Track on Applications. I am certain that both your and
the conference will benefit from your submission.

Best regards,

Joao Manuel R. S. Tavares
(IWCIA 08 co-organizer)



From __peter__ at web.de  Tue Aug 14 09:20:46 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 14 Aug 2007 15:20:46 +0200
Subject: how to move cursor in Interactive Interpreter
References: <1187072484.626674.157200@x40g2000prg.googlegroups.com>
	<f9rivq$sfc$00$1@news.t-online.com>
	<1187090548.811916.124450@x40g2000prg.googlegroups.com>
Message-ID: <f9sa7f$amh$00$1@news.t-online.com>

 yan.python at gmail.com wrote:

> what am i supposed to do to install the module GNU readline correctly
> then?

> by the way,my linux is Mandriva 10

Use the package manager of your distribution to install the readline
development package -- after some struggle with Mandriva's website I came
to suppose that it's libreadline5-devel for you:

urpmi libreadline5-devel.rpm

After you have successfully installed that package unpack the python archive
into a fresh directory and do the configure/make/install dance. No manual
changes should be necessary.

Peter



From pyth0nc0d3r at gmail.com  Wed Aug 22 16:51:08 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Wed, 22 Aug 2007 15:51:08 -0500
Subject: Import question
Message-ID: <eb79828c0708221351v5aab6849pc38fce55f4f7eea@mail.gmail.com>

can I import more then one modules like this:

import module,module2


?
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From steve at holdenweb.com  Thu Aug 30 13:47:57 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 30 Aug 2007 13:47:57 -0400
Subject: Python doesn't see the directories I create
In-Reply-To: <fb6u06$d4i$1@sea.gmane.org>
References: <ldvBi.293202$LE1.92748@newsfe13.lga>	<46d6856b$0$17674$426a74cc@news.free.fr>	<slrnfddha0.1o4.horpner@FIAD06.norwich.edu>
	<fb6u06$d4i$1@sea.gmane.org>
Message-ID: <fb6vsh$jo4$1@sea.gmane.org>

Steve Holden wrote:
[...]
> The fact is that some strings are always going to cause trouble. 
> Unfortunately programming itself is a task that requires a little more 
> knowledge to be applied to the task. Just learn the rules and move on.

As a quick follow-up, I had intended to comment on the usefulness of 
"verbatim literals".

string a = "hello, world";                  // hello, world
string b = @"hello, world";                 // hello, world
string c = "hello \t world";                // hello     world
string d = @"hello \t world";               // hello \t world
string e = "Joe said \"Hello\" to me";      // Joe said "Hello" to me
string f = @"Joe said ""Hello"" to me";     // Joe said "Hello" to me
string g = "\\\\server\\share\\file.txt";   // \\server\share\file.txt
string h = @"\\server\share\file.txt";      // \\server\share\file.txt
string i = "one\r\ntwo\r\nthree";

The @ character introduces a verbatim literal, and you can see from the 
examples given that they are implement a mixture of raw-string and 
triple-quote capabilities (even allowing multi-line string constants). I 
haven't fired up Visual Studio to verify, but I imagine you can even end 
a verbatim literal with a back-quote.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From stanc at al.com.au  Tue Aug  7 00:20:21 2007
From: stanc at al.com.au (Astan Chee)
Date: Tue, 07 Aug 2007 14:20:21 +1000
Subject: get position is scrolled wxScrolledWindow
Message-ID: <46B7F305.7060405@al.com.au>

Hi,
I have a wxScrolledWindow, and some things drawn on it. I've hooked the 
left click event to a certain function I've got. Anyway, everytime I do 
a event.GetPosition() on the position of the mouse on the 
wxScrolledWindow, it returns the physical location or position of the 
mouse. Does anyone have any examples or advice on how to get the real or 
position of the window including where it has been scrolled?
Thanks
Astan


From software at ginstrom.com  Wed Aug 29 22:00:56 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Thu, 30 Aug 2007 11:00:56 +0900
Subject: How to use os.putenv() ?
In-Reply-To: <1188436871.549201.315170@g4g2000hsf.googlegroups.com>
References: <1188436871.549201.315170@g4g2000hsf.googlegroups.com>
Message-ID: <02ea01c7eaa9$9ace4350$0303a8c0@MOUSE>

> On Behalf Of google at tyeon.com
> What am I doing wrong?  How do I change the value of an 
> environment variable?

You'll have to go through the Windows registry. Please have a look at the
following recipe:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/55993

I also have my own routines based on that for getting and setting the path:

##################

import _winreg as winreg
import win32gui
import win32con

REG_KEY_PATH = r'SYSTEM\CurrentControlSet\Control\Session
Manager\Environment'

def set_path(pathval):
    """Set the PATH environment variable"""

    try:
        reg = winreg.ConnectRegistry(None,
                                     win32con.HKEY_LOCAL_MACHINE)
        key = winreg.OpenKey(reg,
                             REG_KEY_PATH,
                             0,
                             win32con.KEY_ALL_ACCESS)
        
        winreg.SetValueEx(key,
                          'path',
                          0,
                          win32con.REG_EXPAND_SZ,
                          pathval)
            
        win32gui.SendMessage(win32con.HWND_BROADCAST,
                             win32con.WM_SETTINGCHANGE,
                             0,
                             'Environment')

    finally:
        winreg.CloseKey(key)    
        winreg.CloseKey(reg)
        
def get_path():
    """Get the PATH environment variable"""
    try:
        reg = winreg.ConnectRegistry(None,
                                     win32con.HKEY_LOCAL_MACHINE)
        key = winreg.OpenKey(reg,
                             REG_KEY_PATH,
                             0,
                             win32con.KEY_ALL_ACCESS)
        
        return winreg.QueryValueEx(key,
                                   'path')[0]

    finally:
        winreg.CloseKey(key)    
        winreg.CloseKey(reg)

##################

Regards,
Ryan Ginstrom



From info at wingware.com  Fri Aug  3 15:28:11 2007
From: info at wingware.com (Wingware)
Date: Fri, 03 Aug 2007 15:28:11 -0400
Subject: Announcing Wing IDE 101 for teaching intro programming courses
Message-ID: <mailman.1614.1186236001.22759.python-announce-list@python.org>

Hi,

We're pleased to announce the first public beta release of Wing IDE 101,
a free scaled back edition of Wing IDE that was designed for teaching
introductory programming courses.

We are releasing Wing IDE 101 to the general public in the hopes
that it may help others teach with or learn Python.  Wingware also
offers educational pricing for Wing IDE Professional, including steep
discounts for class room use.  If you are interested in teaching
Python with Wing IDE, please email support at wingware.com for more
information.

Key features of Wing IDE 101 include:

   * Powerful Editor -- Syntax highlighting, goto-definition, navigation
     menus, error indicators, auto-indent, and keyboard emulation for
     Visual Studio, VI/Vim, Emacs, and Brief.
   * Python Shell -- Evaluate files and selections in the integrated Python shell.
   * Graphical Debugger -- Set breakpoints and view stack and program data.

Note that Wing IDE 101 omits auto-completion and most other code intelligence
features found in the other Wing IDE products. This was by design, so that
students are more conscious of the details of the language and the modules
that they are learning about.

Wing IDE 101 is available on Windows, Linux, and Mac OS X. It is free for all
non-commercial uses and does not require a license code to run.  Wing 101
is not, however, open source.

The current release is 3.0 beta1 and is available here:

http://wingware.com/downloads/wingide-101

General information for beta testers is here:

http://wingware.com/wingide/beta

More details on Wing 101's features are here:

http://wingware.com/wingide-101
http://wingware.com/wingide/features

Please direct bug reports and suggestions to support at wingware.com.

Thanks!

The Wingware Team
Wingware | Python IDE
Advancing Software Development

www.wingware.com



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  2 12:02:35 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 02 Aug 2007 18:02:35 +0200
Subject: standalone process to interact with the web
In-Reply-To: <1186059016.461925.295520@e16g2000pri.googlegroups.com>
References: <1185899130.331170.151980@e16g2000pri.googlegroups.com>
	<mailman.1375.1185900147.22759.python-list@python.org>
	<1185904623.754078.198910@e9g2000prf.googlegroups.com>
	<mailman.1379.1185905472.22759.python-list@python.org>
	<1185909098.952860.217190@j4g2000prf.googlegroups.com>
	<46b05aac$0$31743$426a74cc@news.free.fr>
	<1186059016.461925.295520@e16g2000pri.googlegroups.com>
Message-ID: <46b20019$0$18576$426a74cc@news.free.fr>

beginner a ?crit :
> On Aug 1, 5:04 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>> beginner a ?crit :
>> (snip)
>>
>>> Yes exactly. I just don't want to reinvent the wheel as I imagine
>>> there are already tons of libraries and frameworks that support RPC or
>>> the like functions.
>> Why go thru the pain of RPC, SOAP or such bloated horrors ? Why not just
>> use plain old HTTP with a RESTful API ? Then you just need to make your
>> app wsgi compliant.
> 
> I am not familiar with RESTful API. I will look into it.
> 
It's nothing else than the correct use of the HTTP protocol. And it's 
much more simpler than all those XMLRPC, SOAP and whatnot monstruosities.


From michael at jedimindworks.com  Thu Aug 16 23:14:31 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Thu, 16 Aug 2007 20:14:31 -0700
Subject: clarification
In-Reply-To: <aa405c1f0708160242s2222a0ak3dd253df50a90c5b@mail.gmail.com>
References: <aa405c1f0708160242s2222a0ak3dd253df50a90c5b@mail.gmail.com>
Message-ID: <7659926D-6282-4FD7-9E0B-B5FE7FAF44BE@jedimindworks.com>


On Aug 16, 2007, at 2:42 AM, Beema shafreen wrote:

> hi every body,
> i have compared two files:
> code:
>
> fh = open('HPRD_MAIN_20.txt','r')
> for line in fh.readlines():
>         data = line.strip().split('#')
>         fh1 = open('NOMENCLATURE_MAIN_20.txt','r')
>         for line1 in fh1.readlines():
>                 data1 = line1.strip().split('#')
>                 if  data1[0] == data[0]:
>                         result = data[0] +'#'+data[3]+'|'+ data[4] 
> +'|'+data[9]+'|'+ data1[3]
>                         print result
> the result was as given below:
>
>
> 00017#ACTG1|actin, gamma 1|Actin gamma 1|ACTG
> 00017#ACTG1|actin, gamma 1|Actin gamma 1|Actin gamma
> 00017#ACTG1|actin, gamma 1|Actin gamma 1|Cytoskeletal gamma actin
>
>
> but i need the result to be like this :
>
>
> 00017#ACTG1|actin, gamma 1|Actin gamma 1|ACTG,Actin  
> gamma,Cytoskeletal gamma, actin
>
>
> with out redundancy and the name in the same line separated by  
> commas..
> please suggest what should i do for this to get the result like this.

# untested
fh = open('HPRD_MAIN_20.txt','r')
for line in fh.readlines():
         data = line.strip().split('#')
         hprd = '%s#%s|%s|%s|' % (data[0], data[3], data[4], data[9])
         nomenclature = []
         fh1 = open('NOMENCLATURE_MAIN_20.txt','r')
         for line1 in fh1.readlines():
                 data1 = line1.strip().split('#')
                 if  data1[0] == data[0]:
                         nomenclature.append(data1[3])
         print '%s%s' % (hprd, ','.join(nomenclature))

hth,
Michael

---
"I would rather use Java than Perl. And I'd rather be eaten by a  
crocodile than use Java." ? Trouser


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From webusa2007 at gmail.com  Tue Aug 14 14:38:00 2007
From: webusa2007 at gmail.com (web24)
Date: Tue, 14 Aug 2007 11:38:00 -0700
Subject: Webcool24.com : Biggest worldwide Asian free Video multi language web
	, Travel, Sports, Racing cars , Massages techniques, Games ,
	Fashions, Jokes , Top models , Free  online IT learning ,
	5000  links, 250 free online TV , 50000  music video,
	nice landscapes , Health , Flowers , etc ...
Message-ID: <1187116680.674044.200030@l70g2000hse.googlegroups.com>

Hi  ,

I'd like to introduce you a  biggest Asian  free  Video  multi
language entertainment website    :


http://www.webcool24.com/


Best regards.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Aug  1 08:45:13 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 01 Aug 2007 14:45:13 +0200
Subject: wxPython version question
References: <1185970526.612299.277930@o61g2000hsh.googlegroups.com>
Message-ID: <5hbdipF3k35tqU1@mid.individual.net>

The Max wrote:

> Hi have need of testing the version of wxPython in use .... at the
> moment I use wxversion, but I don't can find a method for testing
> version like this:
> 
> if versionOfWX() <= 2.8:
> 
> or
> 
> if versionOfWX() >= 2.8:
> 
> ( versioneOfWX is a pseudo-function  create for this example )
> 
> Someone know a solution for this ?

>>> import wx
>>> wx.VERSION
(2, 8, 1, 1, '')
>>> 

Regards,


Bj?rn

-- 
BOFH excuse #298:

Not enough interrupts



From crobc at BOGUS.sbcglobal.net  Sun Aug 19 19:20:03 2007
From: crobc at BOGUS.sbcglobal.net (CC)
Date: Sun, 19 Aug 2007 16:20:03 -0700
Subject: Can I add methods to built in types with classes?
Message-ID: <faaj740b8d@news3.newsguy.com>

Hi:

I've gotten through most of the "9. Classes" section of the tutorial.  I 
can deal with the syntax.  I understand the gist of what it does enough 
that I can play with it.  But am still a long way from seeing how I can 
use this OOP stuff.

But I have one idea.  Not that the functional approach isn't workable, 
but I have a situation where I need to test if all the characters in a 
string are in the set of hexadecimal digits.

So I wrote:
------------------------------------------
from string import hexdigits

def ishex(word):
     for d in word:
         if d not in hexdigits: return(False)
     else return(True)
------------------------------------------

Then I can do this to check if a string is safe to pass to the int() 
function without raising an exception:

if ishex(string):
     value = int(string, 16)

But can I create a class which inherits the attributes of the string 
class, then add a method to it called ishex()?  Then I can do:

if string.ishex():
     value = int(string, 16)

The thing is, it doesn't appear that I can get my hands on the base 
class definition/name for the string type to be able to do:

---------------------------------------
class EnhancedString(BaseStringType):
     def ishex(self):
         for d in word:
             if d not in hexdigits: return(False)
         else return(True)
---------------------------------------

Thanks.



-- 
_____________________
Christopher R. Carlen
crobc at bogus-remove-me.sbcglobal.net
SuSE 9.1 Linux 2.6.5


From bj_666 at gmx.net  Thu Aug 30 16:03:48 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 Aug 2007 20:03:48 GMT
Subject: Pivy problem and some other stuff
References: <1188501707.593319.23330@m37g2000prh.googlegroups.com>
Message-ID: <5jom54Fh543U2@mid.uni-berlin.de>

On Thu, 30 Aug 2007 19:21:47 +0000, azrael wrote:

> And there is anoher question in my mind.
>  Is there a way to make a list in python which contains a series of
> functions. I did'n try it. Something like:

Why don't you just try!?

>>>>def a():
>>>>  return 1
> 
>>>>def b():
>>>>   return 2
> 
>>>>def c():
>>>>   return 3
> 
>>>>def d():
>>>>   return 4
> 
>>>> list=[a(),b(),c(),d()]
>>>> list
> [1,2,3,4]

This isn't a list of functions but a list of results of function calls. 
If you want the functions in that list then leave off the parentheses,
because those are the "call operator".

In [55]: def a():
   ....:     return 1
   ....:

In [56]: def b():
   ....:     return 2
   ....:

In [57]: funcs = [a, b]

In [58]: funcs
Out[58]: [<function a at 0xb7792e2c>, <function b at 0xb779e1ec>]

In [59]: funcs[0]()
Out[59]: 1

In [60]: funcs[1]()
Out[60]: 2

Ciao,
	Marc 'BlackJack' Rintsch


From steve at holdenweb.com  Tue Aug 14 19:30:01 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 14 Aug 2007 19:30:01 -0400
Subject: chmod g+ Equivalent
In-Reply-To: <1187094251.540591.308320@g4g2000hsf.googlegroups.com>
References: <1187042290.821786.178420@19g2000hsx.googlegroups.com>	<mailman.1946.1187053563.22759.python-list@python.org>
	<1187094251.540591.308320@g4g2000hsf.googlegroups.com>
Message-ID: <46C23AF9.3020107@holdenweb.com>

milan_sanremo wrote:
> On Aug 13, 8:06 pm, Steve Holden <st... at holdenweb.com> wrote:
>> milan_sanremo wrote:
>>> I've read the documentation on os.chmod() and can implement all the
>>> standard commands, but what is the syntax for the equivalent of chmod g
>>> + to set the group id?
>> I assume when you say "to set the group id" you actually mean "to assert
>> the setgid bit"? I further presume that when you say "chmod g+" you
>> actually mean "chmod g+s".
> 
> The g+s was an omission on my part.  I can see how it would confuse
> the issue.
> 
> I'm not sure if I mean "to assert the setgid bit".  My SUN docs refer
> to it being 'on'.
> http://docs.sun.com/app/docs/doc/819-3321/6n5i4b767?l=en&a=view&q=setgid+bit
> 
>> You can't have read the documentation very thoroughly. It says right at
>> the top:
>>
>> S_ISUID
>> S_ISGID
> 
> I did see this in the documentation:
> 
> Change the mode of path to the numeric mode. mode may take one of the
> following values (as defined in the stat module) or bitwise or-ed
> combinations of them:
> 
>     * S_ISUID
>     * S_ISGID
> 
> Which refers to:
> http://docs.python.org/lib/module-stat.html
> 
> After which it was still unclear.
> 
> My question is in the command os.chmod(myDirectory, ?) what is the
> value for ? to turn on the setgid bit.
> 
> Contrary to your presumption, I did read the documentation
> thoroughly.  It is inability to understand the concept which prompted
> me to post the question here.
> 
Well, you don't tell us what (if anything) you have tried so far. Python 
has an interpreter that's very easy to use interactively. Why don't you try

     os.chmod(my_directory, os.S_ISGID)

and see if it does what you want? You can often save time by trying such 
things for yourself. Though it needn't be a substitute for asking 
questions on this list, it can make your questions better-informed.

In this particular case, now I understand your needs a little better, 
since you want to *add* a bit setting you will likely have to use 
something like

     current_permissions = os.fstat(my_directory).ST_MODE

to read the directory's current permission bits. Then you will need to 
execute

     os.chmod(my_directory, current_permissions | stat.S_ISGID)

Please don't take this as gospel, though, as I am currently on the road 
with only a Windows computer available, but I think it should get you 
closer to where you want to be.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From hadronquark at googlemail.com  Thu Aug  2 06:49:32 2007
From: hadronquark at googlemail.com (Hadron)
Date: Thu, 02 Aug 2007 12:49:32 +0200
Subject: Emacs + python
References: <ak8x8v2udo.fsf@googlemail.com>
	<mailman.1476.1186017909.22759.python-list@python.org>
Message-ID: <lxd4y6gqir.fsf@googlemail.com>

Edward O'Connor <hober0 at gmail.com> writes:

>> Could anyone put me on the right track to developing Python with emacs
>> please : modes to consider, debugging etc hopefully all within emacs.
>
> Personally, I prefer the python.el that ships with Emacs 22 to the
> python-mode.el from python.org. It seems more like other Emacs major
> modes.
>
>
> Ted

Could you extrapolate a little more on what you see as the differences?

I addition, I run pdb under emacs and the GUD menu appears but I cant
set break points by clicking in the left column of the source
display. Is there a way to get this working?


From dickinsm at gmail.com  Fri Aug 24 22:03:39 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: Sat, 25 Aug 2007 02:03:39 -0000
Subject: Does shuffle() produce uniform result ?
In-Reply-To: <1188005414.717674.320500@x40g2000prg.googlegroups.com>
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<878x81rt3d.fsf@mulj.homelinux.net>
	<1188005414.717674.320500@x40g2000prg.googlegroups.com>
Message-ID: <1188007419.017370.72380@e9g2000prf.googlegroups.com>

On Aug 24, 9:30 pm, Mark Dickinson <dicki... at gmail.com> wrote:

> x = floor((n/2**53)*7)
>
> will produce 0, 1, 3 and 5 with probability (2**53//7+1)/2**53, and 2,
> 4 and 6 with probability (2**53//7)/2*53.

Oops---I lied;  I forgot to take into account the rounding implicit in
the (n/2**53)*7 multiplication.  A bit of experimentation shows that
it's 0, 2, 4 and 6 that occur more often, with 1, 3 and 5 less likely
by a miniscule amount (at least on an IEEE-754 system).

Mark



From rpw3 at rpw3.org  Mon Aug 20 01:25:26 2007
From: rpw3 at rpw3.org (Rob Warnock)
Date: Mon, 20 Aug 2007 00:25:26 -0500
Subject: Xah's Edu Corner: Under the spell of Leibniz's dream
References: <1187567809.896668.228650@z24g2000prh.googlegroups.com>
	<1187578927.945921.280180@q4g2000prc.googlegroups.com>
Message-ID: <4ZKdnQVa65RbuFTbnZ2dnUVZ_qKgnZ2d@speakeasy.net>

Twisted  <twisted0n3 at gmail.com> wrote:
+---------------
| > "Under the spell of Leibniz's dream" (2000) By Edsger W
| >  Dijkstrahttp://www.cs.utexas.edu/~EWD/ewd12xx/EWD1298.PDF
| 
| A link to a copy in a non-toxic format would be nice.
+---------------

Well, the fact of the matter is that the bulk of Dijkstra's
"EWD" papers were written *long* before the web existed, typed
on a favorite manual typewriter which he continued using for the
remainder of his professional life. <http://www.cs.utexas.edu/~EWD/>
has more details on the more than one thousand "EWD"s he wrote.
Until very recently, the *only* source for these documents was
either in hardback technical books (for the few that were published)
or in the PDF bitmaps of scans of the original manually-typed pages,
which the University of Texas at Austin has generously made [and
even after Dijkstra's death continues to make] available on-line.

However, a *few* but "growing number of the PDF bitmap documents
have been transcribed to make them searchable and accessible to
visitors who are visually impaired." If you would care to volunteer
[as over sixty others have done] to contribute to the transcriptions,
see <http://www.cs.utexas.edu/~EWD/transcriptions/invitation.html>.

Otherwise, just count your blessings that these gems are available
at all...


-Rob

-----
Rob Warnock			<rpw3 at rpw3.org>
627 26th Avenue			<URL:http://rpw3.org/>
San Mateo, CA 94403		(650)572-2607



From Astley.lejasper at gmail.com  Tue Aug 28 06:09:15 2007
From: Astley.lejasper at gmail.com (Astley.lejasper at gmail.com)
Date: Tue, 28 Aug 2007 10:09:15 -0000
Subject: National grid to lat long conversion
Message-ID: <1188295755.877801.217710@r29g2000hsg.googlegroups.com>

Hi,

I have a load of British National Grid references that I want to
convert to decimal degrees so I can create a google KML file. Does
anyone know of a module to do this?

I've looked at http://pygps.org/#LatLongUTMconversion but am not
really up to speed with projections and all this other mapping stuff.

I want to take something like

x = 417512 y = 315098 (SK 17570 15100)

and convert it to a google compatible decimal degrees

lat: 52.733255N Long: -1.741239

Any help would be great



From nospam at invalid.com  Sun Aug 26 19:12:11 2007
From: nospam at invalid.com (Jack)
Date: Sun, 26 Aug 2007 16:12:11 -0700
Subject: Parser Generator?
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
	<_6mdnZxbdNKTVFrbnZ2dnUVZ_tqtnZ2d@comcast.com>
	<1188003076.702532.241950@q3g2000prf.googlegroups.com>
Message-ID: <CuKdneXMGb5XlU_bnZ2dnUVZ_sSlnZ2d@comcast.com>

Good to know, thanks Paul.
!
"Paul McGuire" <ptmcg at austin.rr.com> wrote in message

> Pyparsing was already mentioned once on this thread.  Here is an
> application using pyparsing that parses Chinese characters to convert
> to English Python.
>
> http://pypi.python.org/pypi/zhpy/0.5
>
> -- Paul 




From nitro at dr-code.org  Mon Aug  6 09:37:26 2007
From: nitro at dr-code.org (Nitro)
Date: Mon, 06 Aug 2007 15:37:26 +0200
Subject: Scope question
Message-ID: <op.twm34othz3pzfc@nitrogenycs2>

Thanks a lot for clearing this up, Diez!

-Matthias


From gagsl-py2 at yahoo.com.ar  Sun Aug 19 15:13:15 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 19 Aug 2007 12:13:15 -0700
Subject: How to make a module function visible only inside the module?
In-Reply-To: <1187488017.198905.242610@j4g2000prf.googlegroups.com>
References: <1187484334.091530.90420@m37g2000prh.googlegroups.com>
	<1i32pg7.b0y3h92vjygwN%raims@dot.com>
	<1187488017.198905.242610@j4g2000prf.googlegroups.com>
Message-ID: <1187550795.085091.162400@57g2000hsv.googlegroups.com>

On 18 ago, 22:46, beginner <zyzhu2... at gmail.com> wrote:
> On Aug 18, 8:27 pm, ra... at dot.com (Lawrence Oluyede) wrote:
> > beginner <zyzhu2... at gmail.com> wrote:

> > > Is there any equivalent version of C's static function in Python. I
> > > know I can make a class function private by starting a function name
> > > with two underscores, but it does not work with module functions.
> > > For exmaple, __func1 is still visible outside the module.
>
> > Yes, and _f() will also be. There's no such thing as enforcing
> > encapsulation in Python, even the "__method()" trick can be easily
> > bypassed if you have to.
>
> Thanks a lot. I was using two underscores, __module_method() as my
> static method convention, and then I had some problems calling them
> from inside class methods.- Ocultar texto de la cita -

The convention is to use a single leading underscore _f to indicate
private things.
When you see something like:

from some_module import _function

you know you are messing with internal stuff.

There is another form of import:

from some_module import *

that will import all public names defined in some_module, into the
current namespace. By default, the public names are all names not
beginning with "_" - but you can customize it defining __all__ which
must be the list of public names. (Note that this form of import is
strongly discouraged).
For more info, see the Reference Manual: <http://docs.python.org/ref/
import.html>

--
Gabriel Genellina



From glenn.chappell at gmail.com  Fri Aug 10 21:42:47 2007
From: glenn.chappell at gmail.com (glenn.chappell at gmail.com)
Date: Sat, 11 Aug 2007 01:42:47 -0000
Subject: wxPython - drawing without paint event
In-Reply-To: <1186738813.373909.96230@x35g2000prf.googlegroups.com>
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
	<1186738813.373909.96230@x35g2000prf.googlegroups.com>
Message-ID: <1186796567.331348.42450@q3g2000prf.googlegroups.com>

On Aug 10, 1:40 am, 7stud <bbxx789_0... at yahoo.com> wrote:
> On Aug 9, 7:46 pm, Matt Bitten <mbitte... at yahoo.com> wrote:
>
> > I've got a wxPython program that needs to do some drawing on a DC on a
> > regular basis.... And there is no event,
> > so my code doesn't get called. What do I do?
>
> Then the event is: "on a regular basis", i.e. the passage of time.
> You can use a wx.Timer to create events at regular intervals, which
> your code can respond to:
> ...

Thanks!

On a related topic, it seems like it would be nice to do *all* drawing
in
response to paint events. When I get an event from the timer, I would
just tell wx that part of the window needs redrawing, and depend on it
to give me a paint even when nothing of higher priority needs to be
done.
I've seen this kind of logic recommended in other GUI tookits. Is it a
good idea in wxPython, and, if so, how does one do it?



From rdm at rcblue.com  Wed Aug  8 14:20:56 2007
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 08 Aug 2007 11:20:56 -0700
Subject: WinPdb?
Message-ID: <20070808182108.C857D1E4007@bag.python.org>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070808/d81bc6a2/attachment.html>

From hat at se-162.se.wtb.tue.nl  Mon Aug 20 08:39:45 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Mon, 20 Aug 2007 14:39:45 +0200
Subject: desperately in need of a tool
References: <1187560418.339131.283470@i38g2000prf.googlegroups.com>
Message-ID: <slrnfcj2sh.9la.hat@se-162.se.wtb.tue.nl>

On 2007-08-19, yagyala <mbrown at phys.ksu.edu> wrote:
> Hi.
>
> one of those standards is that the comments for each routine must
> indicate every other routine that it calls. As I try to keep my

> to do this by hand. Does anyone know of a tool that could do this for
> me, or at least a tool that can tell what other routines a given
> routine calls that I could program against? (Preferably something that
> works under pydev, but I'm not going to be choosy.)

Wouldn't a regular expression be enough here?

Something like

# x.py
import re, sys

fcallpat = re.compile(r'\w+\(')

data = sys.stdin.read()
for match in fcallpat.findall(data):
    print match



$ python x.py < x.py
compile(
read(
findall(

You may want to have a wider matching criterium than \w+


Albert



From jstroud at mbi.ucla.edu  Sun Aug 26 18:59:47 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 26 Aug 2007 22:59:47 GMT
Subject: YOU MUST KNOW THIS MAN
In-Reply-To: <1188153967.206797.224850@d55g2000hsg.googlegroups.com>
References: <1188153967.206797.224850@d55g2000hsg.googlegroups.com>
Message-ID: <DBnAi.317$FO2.13@newssvr14.news.prodigy.net>

Would Muhammad, peace and blessings be upon him, want his followers to 
kill in his name? I know that other prophets would not.


From pyscottishguy at hotmail.com  Tue Aug 14 22:30:44 2007
From: pyscottishguy at hotmail.com (pyscottishguy at hotmail.com)
Date: Tue, 14 Aug 2007 19:30:44 -0700
Subject: creating and appending to a dictionary of a list of lists
Message-ID: <1187145044.394889.312590@x35g2000prf.googlegroups.com>

Hey,

I started with this:

factByClass = {}

def update(key, x0, x1, x2, x3):
    x = factByClass.setdefault(key, [ [], [], [], [] ])
    x[0].append(x0)
    x[1].append(x1)
    x[2].append(x2)
    x[3].append(x3)

update('one', 1, 2, 3, 4)
update('one', 5, 6, 7, 8)
update('two', 9, 10, 11, 12)

print factByClass

{'two': [[9], [10], [11], [12]], 'one': [[1, 5], [2, 6], [3, 7], [4,
8]]}

I then 'upgraded' to this:

def update(key, *args):
    x = factByClass.setdefault(key, [[], [], [], [] ])
    for i, v in enumerate(args):
        x[i].append(v)

Is there a better way?
Cheers!



From kyosohma at gmail.com  Wed Aug 15 17:05:48 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 15 Aug 2007 14:05:48 -0700
Subject: Move files/directories to Recycle Bin using standard Python libs
In-Reply-To: <f9vlnk$ike$1@foggy.unx.sas.com>
References: <f9va80$ciu$1@foggy.unx.sas.com>
	<mailman.2027.1187204570.22759.python-list@python.org>
	<f9vlnk$ike$1@foggy.unx.sas.com>
Message-ID: <1187211948.913922.197830@m37g2000prh.googlegroups.com>

On Aug 15, 2:55 pm, Kevin D. Smith <Kevin.Sm... at sas.com> wrote:
> On 2007-08-15 13:02:24 -0600, "Chris Mellon" <arka... at gmail.com> said:
>
> > Not easily. The recycle bin is part of the shell, and the shell api
> > calls have very complicated struct parameters that are cumbersome to
> > use correctly from ctypes. If you do the work to map the fileop
> > structs to ctypes you can call the shell API file operation functions
> > in shell32.dll. This assumes that "standard" for you is Python 2.5,
> > which has ctypes. Otherwise you are out of luck.
>
> Unfortunately, I need this to work on Python 2.4 as well...
>
> --
> Kevin D. Smith

As I mentioned in my previous post, you can download ctypes from
sourceforge for 2.4.

Mike



From info at wingware.com  Fri Aug  3 15:28:11 2007
From: info at wingware.com (Wingware)
Date: Fri, 03 Aug 2007 15:28:11 -0400
Subject: Announcing Wing IDE 101 for teaching intro programming courses
Message-ID: <46B381CB.5000800@wingware.com>

Hi,

We're pleased to announce the first public beta release of Wing IDE 101,
a free scaled back edition of Wing IDE that was designed for teaching
introductory programming courses.

We are releasing Wing IDE 101 to the general public in the hopes
that it may help others teach with or learn Python.  Wingware also
offers educational pricing for Wing IDE Professional, including steep
discounts for class room use.  If you are interested in teaching
Python with Wing IDE, please email support at wingware.com for more
information.

Key features of Wing IDE 101 include:

   * Powerful Editor -- Syntax highlighting, goto-definition, navigation
     menus, error indicators, auto-indent, and keyboard emulation for
     Visual Studio, VI/Vim, Emacs, and Brief.
   * Python Shell -- Evaluate files and selections in the integrated Python shell.
   * Graphical Debugger -- Set breakpoints and view stack and program data.

Note that Wing IDE 101 omits auto-completion and most other code intelligence
features found in the other Wing IDE products. This was by design, so that
students are more conscious of the details of the language and the modules
that they are learning about.

Wing IDE 101 is available on Windows, Linux, and Mac OS X. It is free for all
non-commercial uses and does not require a license code to run.  Wing 101
is not, however, open source.

The current release is 3.0 beta1 and is available here:

http://wingware.com/downloads/wingide-101

General information for beta testers is here:

http://wingware.com/wingide/beta

More details on Wing 101's features are here:

http://wingware.com/wingide-101
http://wingware.com/wingide/features

Please direct bug reports and suggestions to support at wingware.com.

Thanks!

The Wingware Team
Wingware | Python IDE
Advancing Software Development

www.wingware.com



From uymqlp502 at sneakemail.com  Thu Aug 30 19:37:30 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Thu, 30 Aug 2007 16:37:30 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <46d75116$0$401$426a74cc@news.free.fr>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<1188430887.481586.106760@l22g2000prc.googlegroups.com>
	<mailman.159.1188499976.28954.python-list@python.org>
	<1188504811.019632.186580@x35g2000prf.googlegroups.com>
	<46d75116$0$401$426a74cc@news.free.fr>
Message-ID: <1188517050.174081.265900@x40g2000prg.googlegroups.com>


Bruno Desthuilliers wrote:
> Russ a ?crit :
> (snip)
>
> > I don't see how you can avoid adding some new syntax, given that
> > Python does not
> > currently have syntax for specifying invariants and pre- and post-
> > conditions.
>
> class Parrot(object):
>    @pre(lambda x : x != 42)
>    @post(lambda result: result != 42)
>    @invariant(lambda self: self.x == 42)
>    def reliable_method(self, x):
>      # your code here
>      return something

That looks like new syntax to me. Did I miss your point?

I have no strong leaning about what the exact syntax should be for
programming by contract.
The syntax you show above seems reasonable, except that I am not sure
about requiring
that everything be put inside parentheses. That seems a bit confining
for more complex
conditions.



From cbarton at metavr.com  Fri Aug 10 05:54:58 2007
From: cbarton at metavr.com (Campbell Barton)
Date: Fri, 10 Aug 2007 19:54:58 +1000
Subject: Deleting objects on the fly
In-Reply-To: <1186723571.250731.65040@q3g2000prf.googlegroups.com>
References: <1186705500.227658.163170@q3g2000prf.googlegroups.com>
	<1186723571.250731.65040@q3g2000prf.googlegroups.com>
Message-ID: <46BC35F2.4070600@metavr.com>

Michele Simionato wrote:
> On Aug 10, 2:25 am, Godzilla <godzillais... at gmail.com> wrote:
>> Hello,
>>
>> I wish to know whether I should delete objects created on the fly via
>> the "del obj" statement. I noticed the RAM usage increased whenever
>> the application is being run for a long time. I am creating lots of
>> objects (messages) on the fly for communication between threads.
>>
>> Rather than having python's gc to do the work, does it make a
>> difference if I force a deletion?
>>
>> Thanks.
> 
> Probably not, 'del x' just decrements the reference count, but
> it is the gc who does the real job. See http://docs.python.org/ref/customization.html#l2h-175
> 
> Do you have reference cycles in your application? You should
> tell us something more.
> 
>        Michele Simionato
> 

del x will remove x from memory if nothing else is refering to it, but 
this dosnt really take the load off the GC since the GC will still check 
the references and remove if there are none.

In some cases you could use to save ram...

a = 'really big string'
...do stuff with a...
del a

b = 'another really big string'
...do stuff with b...
del b


in the case that 'a' is not needed, after its used, and you dont want to 
re-use the variable name. then del will free some ram since they both 
wont need to exist at the same time.

WHen I say free ram, python its self will probably keep the ram for 
later use but at least it wont need a and b in memory at once, so its 
likely not to use as much ram.

But be careful using del in a loop since it can slow things down, its 
like adding and removing an item from a dictionary many times. your 
better off just redefining that variable or using del after the loops 
finished.



From siddharthamca at yahoo.co.in  Fri Aug 31 04:37:45 2007
From: siddharthamca at yahoo.co.in (siddhatha veedaluru)
Date: Fri, 31 Aug 2007 14:07:45 +0530 (IST)
Subject: Do you have any complete example for creating msi file(doing file
	copying)
Message-ID: <103056.29674.qm@web7605.mail.in.yahoo.com>

Thank you for the help that you  are going to give me.
 
I have a project where in which i want to create a msi file just as python-package while installing python on the system. Just copying the files to the user given target directory.
 
i want to create similar msi file for my project that just copies the file.
 
Can you please help me in providing the complete procedure of creating the msi file using the python.
 
Does msilib library in the release 2.5 have this capability?
 
Please help me
Thanks
Sid
 



Get the freedom to save as many mails as you wish. Click here to know how.


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From hwg434 at yahoo.com  Tue Aug 28 22:43:15 2007
From: hwg434 at yahoo.com (hwg)
Date: Tue, 28 Aug 2007 19:43:15 -0700
Subject: Newbie question - sorting a slice
Message-ID: <1188355395.424913.90480@19g2000hsx.googlegroups.com>

I've searched the group and didn't see the answer to this...

Why doesn't this work?:

>>> letters = ['d', 'a', 'e', 'c', 'b']
>>> letters[1:3].sort()
>>>

This returns None.

Why?  letters[1:3]  is  ['a', 'e', 'c']    Sorting that should return
['a', 'c', 'e']


hwg



From Junkeun.park at gmail.com  Tue Aug 28 00:46:45 2007
From: Junkeun.park at gmail.com (Jun-geun Park)
Date: Tue, 28 Aug 2007 00:46:45 -0400
Subject: Biased random?
In-Reply-To: <favgh4$1gm3$1@grapevine.csail.mit.edu>
References: <favd0c$fcu$1@ss408.t-com.hr>
	<favgh4$1gm3$1@grapevine.csail.mit.edu>
Message-ID: <46d3a8b5$0$478$b45e6eb0@senator-bedfellow.mit.edu>

Jun-geun Park wrote:
> Ivan Voras wrote:
>> Hi,
>>
>> I have a list of items, and need to choose several elements from it,
>> "almost random". The catch is that the elements from the beginning
>> should have more chance of being selected than those at the end (how
>> much more? I don't care how the "envelope" of probability looks like at
>> this point - can be linear). I see that there are several functions in
>> Python standard libraries for various distribution, but is there an easy
>> pythonic way to make them do what I need?
>>
>>
> 
> That's weird. random.randint(a,b) will be enough for most cases. Test
> your system to see the distribution is uniform with something like:
> 
> ----
> import random
> 
> dist = {}
> for z in xrange(100000):
>     u = random.randint(1,10)
>     try:
>         dist[u] = dist[u] + 1
>     except KeyError:
>         dist[u] = 1
> 
> print dist
> ----

I understood the question wrong.(Thanks, Grant and Robert.) To get the 
linear
distribution, you can start from the following:

     a = (random.random() + random.random())/2.0 # Triangle distribution 
in [0,1)
     b = random.random()                                            # 
Uniform in [0,1)
     c = b + (1-b)*a 
     # Convolution
     u = int(100*(1-c)+1) 
# ceil(100*(1-c))

, then, because convolution of a rectangle function and a triangle 
function is a
linear function under the valid domain, u is a random integer in [1,100]
that follows (decreasing) linear distribution.

Alternatively if I were in your case, I would go with an exponential 
random with
a suitable lambda(by cutting its tail.)


From jstroud at mbi.ucla.edu  Fri Aug 17 17:49:03 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 17 Aug 2007 14:49:03 -0700
Subject: Python and Tkinter Programming--Expensive!
In-Reply-To: <Xllxi.9066$3x.1781@newssvr25.news.prodigy.net>
References: <Xllxi.9066$3x.1781@newssvr25.news.prodigy.net>
Message-ID: <fa554f$vt$1@zinnia.noc.ucla.edu>

W. Watson wrote:
> Why is the book in Subject (author is Grayson) so expensive? $100 on 
> Amazon and $195 on ABE. Aren't there alternatives?


Read the fine print. Its available as an ebook for about $25.00 at 
Manning. You can print out just the parts you need--or read it from your 
iphone.

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From rozniy at gmail.com  Tue Aug  7 00:57:19 2007
From: rozniy at gmail.com (rozniy)
Date: Tue, 07 Aug 2007 04:57:19 -0000
Subject: How to use C enum in Python CTypes?
Message-ID: <1186462639.872254.25660@z24g2000prh.googlegroups.com>

I am using Python's CTypes module to import functions from a DLL into
Python. Some of the DLL's functions take enum type arguments, eg:

olDaGetDASS (HDEV hDev, OLSS OlSs, UINT uiElement, PHDASS phDass);

//(this function is in C form)

>From the header file, I found that type OLSS is an enum, like this:


typedef enum olss_tag
   {
   OLSS_AD,
   OLSS_DA,
   OLSS_DIN,
   OLSS_DOUT,
   OLSS_SRL,
   OLSS_CT
   }
OLSS;

I managed to fudge the HDEV, UINT and PHDASS types as CTypes c_long(),
but I am not sure how translate a C enum into Python...

This site
http://python.net/crew/theller/ctypes/tutorial.html#bugs-todo-and-non-implemented-things

says that enumeration types is not implemented,
"Enumeration types are not implemented. You can do it easily yourself,
using c_int as the base class."

How do I do this? I am fairly new to Python, coming in from C++ (of
which I am utterly sick!)



From vinay_sajip at yahoo.co.uk  Mon Aug 13 08:25:36 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Mon, 13 Aug 2007 12:25:36 -0000
Subject: Extending logging module
In-Reply-To: <1186675688.291944.299060@z24g2000prh.googlegroups.com>
References: <1186675688.291944.299060@z24g2000prh.googlegroups.com>
Message-ID: <1187007936.316025.168250@i13g2000prf.googlegroups.com>

On Aug 9, 9:08 pm, jay <titleistf... at gmail.com> wrote:
> It actually worked, but this is not the way I would like to handle the
> problem.  I would prefer to extend the classes instead.  However, I'm
> not too familiar with that, and I had to change things in so many
> places, I'm wondering if its even possible?  I don't like changing the
> standard libraries, what happens if I have to upgrade python?  My
> changes get overwritten.
>
> Can anyone offer some help or suggestions?  Thanks
>

Where's the difficulty in extending the SyslogHandler class? Simply
override the methods you need to provide the behaviour you want, then
use your handler instead of the standard SyslogHandler. I'm travelling
at the moment and cannot post a working example, but it should be easy
enough to do. It's just the same as extending any other Python class -
but remember to call the base class's __init__ from your own __init__,
if you provide one.

Best regards,

Vinay Sajip



From debl2NoSpam at verizon.net  Fri Aug 31 22:06:15 2007
From: debl2NoSpam at verizon.net (David Lees)
Date: Sat, 01 Sep 2007 02:06:15 GMT
Subject: HowTo Use Cython on a Windows XP Box?
Message-ID: <rO3Ci.32$453.27@trndny02>

August 31, 2007

I just downloaded the current Cython release and have no problem running 
the cpython.py translator on the demo code.  But when I try compiling, I 
get an error complaining that my version of Python (which is the current 
2.5.1 downloaded from python.org) was compiled with Visual C++ 2003.  I 
only have Visual C++ 2005 on my machine and am unable to find a download 
of 2003 on the Microsoft site (no big surprise).  I have never built 
Python from source.  Is it necessary or can someone suggest an alternative?

TIA

david lees


From nospam.themindstorm at gmail.com  Sat Aug  4 19:25:16 2007
From: nospam.themindstorm at gmail.com (Alex Popescu)
Date: Sat, 4 Aug 2007 23:25:16 +0000 (UTC)
Subject: how to run os.execv() to run command pslq dbname < gen.command
References: <1186229986.707259.323130@19g2000hsx.googlegroups.com>
	<f91uju$130$1@sea.gmane.org>
Message-ID: <Xns9983184871095themindstorm@80.91.229.5>

Steve Holden <steve at holdenweb.com> wrote in
news:f91uju$130$1 at sea.gmane.org: 

> Sonu wrote:
>> hello all ,
>> 
> I want to watch my TV, but it's not working. Can you tell me how to
> fix it? ...
> 

I can help you... but only with a couple of channels :-).

>> i need to run psql from my py file,,
>> for that i am using : os.execv(path for psql ,['psql dbname <
>> gen.command'])
>> but its not working ..........

I assume the problem relies in the execution pathes, but as Steve has 
mentioned: without further details nobody will be able to help you.

./alex
--
.w( the_mindstorm )p.




From geoff.bache at pobox.com  Tue Aug 28 14:13:18 2007
From: geoff.bache at pobox.com (geoffbache)
Date: Tue, 28 Aug 2007 11:13:18 -0700
Subject: Getting subprocesses to be hidden on Windows
In-Reply-To: <YtCdnYoSetVu10nbnZ2dnUVZ_oDinZ2d@comcast.com>
References: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
	<YtCdnYoSetVu10nbnZ2dnUVZ_oDinZ2d@comcast.com>
Message-ID: <1188324798.742700.173970@w3g2000hsg.googlegroups.com>

On 28 Aug, 18:18, Larry Bates <larry.ba... at websafe.com> wrote:
> geoffbache wrote:
> > Hi,
>
> > As part of my efforts to write a test tool that copes with GUIs
> > nicely, I'm trying to establish how I can start a GUI process on
> > Windows that will not bring up the window. So I try to hide the window
> > as follows:
>
> > info = subprocess.STARTUPINFO()
> > info.dwFlags |= subprocess.STARTF_USESHOWWINDOW
> > info.wShowWindow = subprocess.SW_HIDE
>
> > proc = subprocess.Popen(..., startupinfo=info)
>
> > This works, in a way, but doesn't work recursively. I.e. if the
> > started process itself starts a window, that second window will not be
> > hidden. This even applies to dialog boxes within the application. So
> > instead of a lot of windows popping up I now get a lot of disembodied
> > dialogs appearing, which is a slight improvement but not much.
>
> > Also, certain processes (e.g. tkdiff) seem to ignore the directive to
> > be hidden altogether.
>
> > This is dead easy on UNIX with virtual displays like Xvfb. Can someone
> > shed any light if it's possible on Windows from python?
>
> > Regards,
> > Geoff Bache
>
> While I'm not entirely sure I understand what you want, I think you can
> accomplish it by using win32CreateProcess instead of subprocess.  You can run
> the application minimized or perhaps in a REALLY small window.  If you have
> modal dialog boxes, I don't think you can do anything as they don't run in the
> parent windows frame but rather outside (I could be wrong about this).
>
> -Larry

Hi Larry,

I don't know if that would help. I've tried running minimized from the
command line as
suggested by Mike and that has the same issue (child windows and
dialogs don't get minimized)
So the question is moving away from how to technically achieve this in
Python to whether
Windows even supports it...

Geoff



From andmart at gmail.com  Thu Aug  9 09:51:52 2007
From: andmart at gmail.com (=?ISO-8859-1?Q?Andr=E9_Martins?=)
Date: Thu, 9 Aug 2007 10:51:52 -0300
Subject: tests
In-Reply-To: <bfc796de0708090651g4c1bfd1cl7f0e304a1f51eab9@mail.gmail.com>
References: <mailman.1792.1186665714.22759.python-list@python.org>
	<1186666919.456036.120270@d30g2000prg.googlegroups.com>
	<bfc796de0708090651g4c1bfd1cl7f0e304a1f51eab9@mail.gmail.com>
Message-ID: <bfc796de0708090651j42b8f7day7f6b4dd5b6cba07c@mail.gmail.com>

Generate a hash of two files and compare
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From max at alcyone.com  Sun Aug 12 22:25:19 2007
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 12 Aug 2007 19:25:19 -0700
Subject: Fatest standard way to sum bytes (and their squares)?
In-Reply-To: <Xns998A763EAA360duncanbooth@127.0.0.1>
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
	<Xns998A763EAA360duncanbooth@127.0.0.1>
Message-ID: <TbCdnYP1dI2SXCLbnZ2dnUVZ_gqdnZ2d@speakeasy.net>

Duncan Booth wrote:

> I haven't timed it, but at the very least I'd avoid going through all the 
> data twice:
> 
> count = {}
> for i in range(256):
>   count[chr(i)] = 0
> for x in data:
>   count[x] += 1
> 
> ordinalSum = sum(ord(c)*count[c] for c in count)
> ordinalSumSquared = sum(ord(c)**2 * count[c] for c in count)

This approach is definitely faster than using a generator in my tests, 
and was second fastest overall.  I'm actually a bit surprised that it's 
as fast as it is; it never would have occurred to me to try it this way.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   It is morale that wins the victory.
    -- Gen. George C. Marshall


From wildemar at freakmail.de  Fri Aug 24 12:28:35 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Fri, 24 Aug 2007 18:28:35 +0200
Subject: Steve Holden is a moronic, self-indulgent BASTARD [WAS: Re: creating
	a tar file with python]
In-Reply-To: <1187970552.537218.202160@x35g2000prf.googlegroups.com>
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>	<faktv8$8fs$1@sea.gmane.org>	<93066C069973ED448DC2BCEA9C44A7383BE2ED@efmailx>	<46CE4D3D.7020106@holdenweb.com>	<93066C069973ED448DC2BCEA9C44A7383BE2EE@efmailx>	<1187969070.3385.20.camel@dot.uniqsys.com>	<mailman.256.1187969609.32294.python-list@python.org>
	<1187970552.537218.202160@x35g2000prf.googlegroups.com>
Message-ID: <46CF0733.3040508@freakmail.de>

kyosohma at gmail.com wrote:
> I like Steve, but he seems pretty crabby/rude much of the time.
>   

Now what is going on here? I've been on this list for quite some time 
now and over all of Steves very frequent posts this is the first thread 
that I recall in which he sort of snapped. All of the other times he 
managed insults with admirable grace (How's that for fan-mail? ;)). And 
his tone is usually much milder than that of most other regulars here 
(all of whom are very friendly albeit the concise, technical manner of 
communication, sprinkled of course with the occasional sarcastic remark).

Steve, you might want to consider becoming more rude in your 
communication style; that way you don't get flamed for that *one time* 
you actually loose your cool. ;)

Rhetorical closing-questions: Do people start flame wars like this so 
easily in the real world as well? Why do internet-discussions tend to 
burst into all-out battles so quickly? Why do people on the net tend to 
forget that a 1--10 scale actually contains 2--9?

*sigh*
/W


From cpmishra.20 at gmail.com  Thu Aug  2 02:37:58 2007
From: cpmishra.20 at gmail.com (cpmishra)
Date: Thu, 02 Aug 2007 06:37:58 -0000
Subject: No module named DBUtils.PooledDB
Message-ID: <1186036678.623372.221890@w3g2000hsg.googlegroups.com>

Hi all
       I have used DBUtil with python2.4. when we run to program in
dos command ,successfully run but when we run in apache server
(locally)with modepython then given error.Pls  help me

error:
No module named DBUtils.PooledDB

cp mishra



From ricaraoz at gmail.com  Wed Aug 29 08:12:19 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Wed, 29 Aug 2007 09:12:19 -0300
Subject: Haskell like (c:cs) syntax
In-Reply-To: <rAbBi.13285$fb.8669@tornado.fastwebnet.it>
References: <fb25uh$gl9$1@online.de>	<mailman.85.1188339894.28954.python-list@python.org>
	<rAbBi.13285$fb.8669@tornado.fastwebnet.it>
Message-ID: <46D562A3.6030505@bigfoot.com>

Marco Mariani wrote:
> Ricardo Ar?oz ha scritto:
> 
>> L = ['one', 'two', 'three', 'four', 'five']
>>
>> print L[0]    # This would be 'head'
>> print L[1:]   # This would be 'tail'
>>
>> Caution : L[0] and L[1:] are COPIES of the head and tail of the list.
> 
> This might surprise people who see L[1:] = [], since changing a copy is 
> not supposed to change the original.
> 

Sorry, should have written RETURN copies instead of ARE copies.



From rcdailey at gmail.com  Sun Aug 12 22:58:41 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Sun, 12 Aug 2007 21:58:41 -0500
Subject: Python script for mobile platforms -- suggested?
Message-ID: <496954360708121958m170b6cd2j8419802dcdd35482@mail.gmail.com>

Hi,

I'm currently developing a game for a cell phone. The game has a GUI system
that's currently using XML to define the individual menus. Basically this
means that for every single menu the user goes to, it loads and parses an
XML file. Would using Python Script instead of XML be a reasonable
replacement, or would it be even slower? I've read various articles online
but I'm still curious to hear what everyone has to say here.

Thanks.
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From fabioztessitore at libero.it  Tue Aug 28 14:45:12 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 28 Aug 2007 18:45:12 GMT
Subject: localhost, ?!
References: <fb1id4$kpp$1@localhost.localdomain>
Message-ID: <46d46d38$0$37200$4fafbaef@reader3.news.tin.it>

Il Tue, 28 Aug 2007 18:27:31 +0200, Boris Ozegovic ha scritto:

> Three machines, one at my home, other two at my job, in every machine
> there is Win XP SP2 and Python 2.5
> 
> At home:
> urllib2.urlopen("http://localhost"), everything is ok
> 
> At job:
> urllib2.urlopen("http://localhost")
> raise BadStatusLine(line), after half a minute.
> 
> urllib2.urlopen("http://127.0.0.1")
> HTTP Error 503: Service Unavailable, immediately.
> 
> Anybody have slightest clue wthat is going on?  :-/

I think to have http://localhost working you need a web server (like 
apache). maybe you have it at your home.

bye
Fabio


From vasudevram at gmail.com  Fri Aug 24 12:56:25 2007
From: vasudevram at gmail.com (vasudevram)
Date: Fri, 24 Aug 2007 16:56:25 -0000
Subject: How would I compile a Python file to a exe
In-Reply-To: <mailman.206.1187903515.32294.python-list@python.org>
References: <eb79828c0708231355o72f9b200g74036aca19f1806c@mail.gmail.com>
	<mailman.206.1187903515.32294.python-list@python.org>
Message-ID: <1187974585.362430.272470@m37g2000prh.googlegroups.com>

On Aug 24, 2:11 am, Charlie <li... at liquidtrust.org> wrote:
> Quoting Lamonte Harris <pyth0nc0... at gmail.com>:
>
> > Been a while and I'm wondering how I would go about doing it.
>
> py2exe seems to be a fairly good option for this, at least in the
> world of Windows.

Yes, py2exe looks good. I've tried it out. Make sure to test for the
cases you'll need, though.

- Vasudev
-----------------------------------------
Vasudev Ram
http://www.dancingbison.com
http://jugad.livejournal.com
http://sourceforge.net/projects/xtopdf
-----------------------------------------



From dorjetarap at googlemail.com  Sat Aug 18 14:43:13 2007
From: dorjetarap at googlemail.com (dorje tarap)
Date: Sat, 18 Aug 2007 19:43:13 +0100
Subject: creating weblogo-like .png output
Message-ID: <d6a0d8f10708181143i7a3f8106r154e8e7fcf6203ec@mail.gmail.com>

Hi,

For the new program I am creating I want to display some data in a format
similar to weblogo.
<http://www.lecb.ncifcrf.gov/%7Etoms/sequencelogo.html>Basically I
want to create .png output of a table I have that shows
percentage of DNA. There is a python implementation for this, but I can only
seem to install it under linux and I want to make this in xp so I can use
the psyco module. Also the weblogo version contains a lot more complexity
than I need.

Any points to tutorials, or other advice would be helpful.

Thanks
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From s.rappard at gmail.com  Fri Aug 31 03:55:39 2007
From: s.rappard at gmail.com (Sjoerd)
Date: Fri, 31 Aug 2007 07:55:39 -0000
Subject: MySQLdb ImportError
Message-ID: <1188546939.086855.204670@q5g2000prf.googlegroups.com>

Hello!

When I try to import the MySQLdb lib python generates an error:

Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    import MySQLdb
  File "C:\Python25\lib\site-packages\MySQLdb\__init__.py", line 19,
in <module>
    import _mysql
ImportError: DLL load failed with error code 193

This is on a AMD64 bit machine, when I import it on a 32 bit machine
it works fine.
Is there anyway to fix this? Is there a build for AMD64 bit machines
or is there simply no way
that I can get MySQLdb working on it?

Thanks in advance,
Sjoerd



From stefan.behnel-n05pAM at web.de  Wed Aug 22 02:47:32 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 22 Aug 2007 08:47:32 +0200
Subject: urllib2.urlopen(url) pulling something other than HTML
In-Reply-To: <1187753421.798422.9570@q3g2000prf.googlegroups.com>
References: <1187635452.841155.88720@a39g2000hsc.googlegroups.com>
	<1187641080.516885.122350@g4g2000hsf.googlegroups.com>
	<87ejhwr2mi.fsf@pobox.com>
	<1187753421.798422.9570@q3g2000prf.googlegroups.com>
Message-ID: <46CBDC04.5020309@web.de>

Gabriel Genellina wrote:
> On 21 ago, 18:36, j... at pobox.com (John J. Lee) wrote:
>> Gabriel Genellina <gagsl-... at yahoo.com.ar> writes:
>>
>> [...]> Don't even try to understand it - it's a mess. Use the HTMLParser
>>> module instead.
>> [...]
>>
>> Module sgmllib (and therefore module htmllib also) is more tolerant of
>> bad HTML than module HTMLParser.
> 
> I had the impression it was the opposite; anyway, neither of them can
> handle really bad html.
> I just don't *like* htmllib.HTMLParser - but that's only a matter of
> taste.

lxml.html handles bad HTML and it's a powerful tool that is very easy to use.
And if one day you have to deal with really, *really* broken tag soup, it also
comes with BeautifulSoup parser integration.

Stefan


From rcdailey at gmail.com  Fri Aug 17 14:19:13 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Fri, 17 Aug 2007 13:19:13 -0500
Subject: Problem with directory recursion!
In-Reply-To: <496954360708171116t4370c2ddra3d7905bc956c7eb@mail.gmail.com>
References: <496954360708171116t4370c2ddra3d7905bc956c7eb@mail.gmail.com>
Message-ID: <496954360708171119g66564ecas3134aed0b3916f8@mail.gmail.com>

Here's part of the output that's incorrect:

models\W_BoomerEdge
        BYOS_C.entity.xml
        BYOS_C_Collision.entity.xml

Notice that the file BYOS_C.entity.xml is showing up as a file in the
directory W_BoomerEdge. This file does not exist in this folder, but yet in
a different folder. The output is consistent with the 'print' statements you
will see in the function I posted earlier.

On 8/17/07, Robert Dailey <rcdailey at gmail.com> wrote:
>
> Hi,
>
> I've created a function that is used to recurse a directory tree in
> Windows XP using os.walk(). For the most part it works, however in some
> instances the data is incorrect and I'm getting invalid sub-directory paths.
> Here's the function:
>
>
> def __doSearch( root_dir, sub_path, restype, ext ):
>     print sub_path
>     # Searches the specified directory and generates a
>     # list of files to preload.
>     complete_path = osp.normpath( osp.join( root_dir, sub_path ) )
>     for root, dirs, files in os.walk( complete_path ):
>
>         # Record the list of file hash ID's
>         for file in files:
>             split = __resType( file )
>             if split[1] == restype:
> #                print sub_path
>                 print "\t", file
>                 __appendResource( ext, sub_path, split[0] )
>
>         # Remove .svn subdirectories; we don't walk these.
>         if ".svn" in dirs:
>             dirs.remove( ".svn" )
>
>         # Recurse child directories
>         for dir in dirs:
>             __doSearch( root_dir, osp.join( sub_path, dir ), restype, ext
> )
>
> Does anyone see anything immediately suspicious about the code? I'm
> assuming that in Python, every time a function is called recursively it gets
> its own copy of local variables. For some reason the sub_path variable isn't
> consistent depending on where I use it. For example, if you notice the print
> call at the very start of the function, it will output something like
> "models/ships". However, after passing it into __appendResource(), it
> appears to be just "models".
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070817/17c4b2ed/attachment.html>

From arkanes at gmail.com  Wed Aug  1 12:46:17 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 1 Aug 2007 11:46:17 -0500
Subject: calling a .net application from Python 2.5
In-Reply-To: <8a6b8e350708010925t56d107a0md38a8fc1f750898d@mail.gmail.com>
References: <1185959694.045149.214050@19g2000hsx.googlegroups.com>
	<8a6b8e350708010925t56d107a0md38a8fc1f750898d@mail.gmail.com>
Message-ID: <4866bea60708010946sd68e524tf6989fd5382c5df1@mail.gmail.com>

Note that for 2.5 you'll want the released snapshot, not the official release.

On 8/1/07, James Matthews <nytrokiss at gmail.com> wrote:
> http://pythonnet.sourceforge.net/
>
>
> On 8/1/07, Acm <alextabone at gmail.com > wrote:
> > I am working with Python 2.5.
> >
> > I would like to know how to call a .NET application (or .dll) from a
> > Python script.
> >
> > Can anyone help please?
> >
> > Thank you.
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
>
> --
> http://www.goldwatches.com/
> http://www.jewelerslounge.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From carsten at uniqsys.com  Thu Aug 30 07:50:16 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 30 Aug 2007 07:50:16 -0400
Subject: list index()
In-Reply-To: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
Message-ID: <1188474616.3257.18.camel@localhost.localdomain>

On Wed, 2007-08-29 at 23:44 -0700, zzbbaadd at aol.com wrote:
> What's with the index() function of lists throwing an exception on not
> found? Let's hope this is rectified in Python 3.

You're assuming that this behavior is a mistake. It's not, and
consequently, it won't be "rectified".

>  If nothing else, add
> a function that doesn't throw an exception. There are a million
> situations where you can have an item not be in a list and it is not
> an exception situation.

How could it not be an exception, in the plain English sense of the
word? Most certainly you're asking for the index because you want to do
something with the index. If the item is not found, you have no index,
so that's a special case that must be handled separately. There is no
logical difference between handling that special case in an except
clause versus handling it with an if-branch.

Is the Pythonic way

try:
    i = somelist.index(thing)
    # Do something with i
except IndexError:
    # Do something if thing not found

really that much worse than the theoretical alternative

i = somelist.index_that_returns_an_indicator(thing)
if i!=ThingNotFoundIndicator:
    # Do something with i
else:
    # Do something if thing not found

?

-- 
Carsten Haese
http://informixdb.sourceforge.net




From laurent.pointal at limsi.fr  Tue Aug 14 09:03:29 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 14 Aug 2007 15:03:29 +0200
Subject: JPype - passing to Java main
In-Reply-To: <1187095969.789811.63960@j4g2000prf.googlegroups.com>
References: <1187040070.806416.75090@r34g2000hsd.googlegroups.com>
	<mailman.1941.1187047345.22759.python-list@python.org>
	<1187095969.789811.63960@j4g2000prf.googlegroups.com>
Message-ID: <f9s972$hd2$1@news2.u-psud.fr>

unlikeablePorpoise at gmail.com a ?crit :
>> Try this:
>> com.JPypeTest.main("arg")
>>
>> Ian
> 
> Thanks for your suggestion, but it doesn't work (produces an error).

This is where you should have copy/pasted the error.

;-)

> 
> Does anybody else have any ideas?

Sorry, no.



From steve at holdenweb.com  Tue Aug 14 21:45:41 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 14 Aug 2007 21:45:41 -0400
Subject: buggie in else syntax ?
In-Reply-To: <46C21D70.8000409@gmail.com>
References: <46C21D70.8000409@gmail.com>
Message-ID: <f9tlrv$8j5$2@sea.gmane.org>

stef mientki wrote:
> hello,
> 
> I've the idea that the "else" syntax is not always handled correctly,
> or I'm overlooking something.
> 
[...]

When faced with a choice between an error in a basic piece of Python and 
a misunderstanding on your part, Occam's razor would suggest you are 
failing to understand something.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From cdleary at gmail.com  Wed Aug  8 05:11:18 2007
From: cdleary at gmail.com (cdleary at gmail.com)
Date: Wed, 08 Aug 2007 09:11:18 -0000
Subject: Case study: library class inheritance with property declarations
In-Reply-To: <46b23c19$0$13518$426a74cc@news.free.fr>
References: <1186062582.975223.230270@g12g2000prg.googlegroups.com>
	<1186063694.311416.133390@i13g2000prf.googlegroups.com>
	<1186065365.546545.184840@i13g2000prf.googlegroups.com>
	<46b23c19$0$13518$426a74cc@news.free.fr>
Message-ID: <1186564278.798772.316720@w3g2000hsg.googlegroups.com>

On Aug 2, 7:05 am, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> cdle... at gmail.com a ?crit :
> (snip)
>
> > Last post -- I swear.
>
> > I failed to realize that it's all part of an extremely well defined
> > attribute resolution protocol, and handled via the descriptor
> > specification. Discussing descriptors was on the TODO list for the
> > type/class unification document, but there's a very fulfilling
> > explanation by Raymond Hettinger:http://users.rcn.com/python/download/Descriptor.htm
> > Also, the official doc is here:http://docs.python.org/ref/descriptors.html
>
> > Maybe the documentation for the property builtin should make reference
> > to the descriptor specification? If nobody thinks this is silly, I'll
> > submit a documentation patch in a few days.
>
> What to say ? As an old-time pyton user (well... 7+ years now) and
> meta-programming addict, it's nothing new to me, but the fact that you
> didn't realize it is certainly a clear indication that documentation is
> not really up to date, so yes, submitting a patch is certainly a pretty
> good idea.
>
> > Sorry for the spam -- hope someone besides me learns from it!
>
> What's to be learned is mostly that we (the whole community) should take
> more care of the doc (which I never contributed FWIW, so I'm the first
> one that should feel in guilt here).

Actually I was wrong about this! Of course, the problem was
insufficient test coverage :)

The key addition: assert spam.useful_attr == 12 # FAILS!!! I failed to
realize it in the last posts...

When you don't declare a descriptor as a class attribute the
descriptor protocol isn't invoked! The descriptor protocol looks in
the /class/ attributes -- it transforms spam.useful_attr to
type(spam).__dict__['useful_attr'].__get__(spam, type(spam)), the
caveat being /type(spam)/.

>From the doc: (http://users.rcn.com/python/download/Descriptor.htm)
The implementation works through a precedence chain that gives data
descriptors priority over instance variables, instance variables
priority over non-data descriptors, and assigns lowest priority to
__getattr__ if provided.

The data descriptors are only looked up in the class attributes -- the
instance attributes are returned as-is, so the above assertion fails!

The addition of 'print spam.useful_attr' produces <property object at
0x[something]>, because the portion of the descriptor protocol that
invokes __get__ is does not cover instance attributes (as declared in
__init__).

So, we're back to the original problem, with a bit more insight. What
if we declare the useful_attr property as a class attribute in the
constructor after the LibraryClass initialization function? It only
works once! Once you set a class attribute on the first instantiation
it's obviously there the next time you try to instantiate. Now our
test looks like this:

def test():
    class _Fake(object):
        pass
    external_obj = _Fake()
    external_obj.proxy_useful_attr = 12
    spam = MyInheritedClass(external_obj)
    assert spam.useful_attr == 12
    eggs = MyInheritedClass(external_obj)
    assert eggs.useful_attr == 12

Which provides coverage for the INCORRECT class-attribute-on-
instantiation solution, since eggs won't be able to instantiate. The
solution which fails this test looks like this:

class MyInheritedClass(LibraryClass):
    # WRONG! Don't use this.
    def __init__(self, external_obj):
        LibraryClass.__init__(self)
        def get_useful_attr(would_be_self): # has to be unbound
            return would_be_self._external_obj.proxy_useful_attr
        MyInheritedClass.useful_attr = property(get_useful_attr)
        self._external_obj = external_obj

At this point it seems like the only viable option is to hack
getattribute to add special cases. To do this, we continue to use the
unbound method getter as our argument to property, but add the
getattribute hack which allows for specified instance attributes that
have the descriptor protocol invoked on them:

class MyInheritedClass(LibraryClass):
    # ...
    def __init__(self, external_obj):
        LibraryClass.__init__(self)
        def get_useful_attr(would_be_self):
            return would_be_self._external_obj.proxy_useful_attr
        self.useful_attr = property(fget=get_useful_attr)
        self._external_obj = external_obj

    def __getattribute__(self, attr_name):
        """
        Hacks getattribute to allow us to return desired instance
        attributes with the descriptor protocol.
        """
        instance_descrs = ['useful_attr']
        if attr_name in instance_descrs and attr_name in
self.__dict__:
            attr = self.__dict__[attr_name]
            return attr.__get__(self, type(self))
        return object.__getattribute__(self, attr_name)

This passes the above test, but obviously requires a hack -- is there
a more elegant way to do it?

- Chris



From bj_666 at gmx.net  Thu Aug 30 09:35:39 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 Aug 2007 13:35:39 GMT
Subject: SAXParseException: not well-formed (invalid token)
References: <fb6alc$pfj$1@news.cesga.es> <5jnrrqFdmbcU5@mid.uni-berlin.de>
	<46D6C6CE.5070009@cesga.es>
Message-ID: <5jnvdbFdmbcU7@mid.uni-berlin.de>

On Thu, 30 Aug 2007 15:31:58 +0200, Pablo Rey wrote:

> On 30/08/2007 14:35, Marc 'BlackJack' Rintsch wrote:
>
>> Maybe you can download that XML file and use `xmllint` to check if it
>> is well formed XML!?
> 
> 	This is the output of the xmllint command:
> 
> [prey at www3 voms2users]$ xmllint cms.xml cms.xml:553: error: Input is not
> proper UTF-8, indicate encoding !
> <item>/C=BE/O=BEGRID/OU=Physique/OU=Univesit? Catholique de
> Louvain/CN=Roberfroi
>                                              ^
> cms.xml:553: error: Bytes: 0xE9 0x20 0x43 0x61
> <item>/C=BE/O=BEGRID/OU=Physique/OU=Univesit? Catholique de
> Louvain/CN=Roberfroi
> 
> [?]
> 
> <?xml version="1.0" encoding="UTF-8" ?> 

So the XML says it is encoded in UTF-8 but it contains at least one
character that seems to be encoded in ISO-8859-1.

Tell the authors/creators of that document there XML is broken.

Ciao,
	Marc 'BlackJack' Rintsch


From athropos at gmail.com  Wed Aug 15 08:39:16 2007
From: athropos at gmail.com (=?ISO-8859-1?Q?Fran=E7ois_Ingelrest?=)
Date: Wed, 15 Aug 2007 14:39:16 +0200
Subject: Combinatorial of elements in Python?
In-Reply-To: <46C2ED11.70904@freakmail.de>
References: <9e2f512b0708142203m782b0e10s817fb4d061ba0e46@mail.gmail.com>
	<46C2ED11.70904@freakmail.de>
Message-ID: <e9adacf30708150539h25ce36acyee5cff404f29a78a@mail.gmail.com>

> > I have 2 (or more) groups of elements, and I want to get all possible
> > unique combinations from all of them. Is there a build-in method to do
> > it?
> >>> ADictionary={"one":["A","B","C","D"],"two":["H","I"]}
> >>> result = set()
> >>> for one in ADictionary["one"]:
> ...     for two in ADictionary["two"]:
> ...         result.add(one + two)
> ...
> >>> result
> set(['CI', 'CH', 'DH', 'DI', 'AI', 'AH', 'BH', 'BI'])

With a list comprehension:

>>> d={"one":["A","B","C","D"],"two":["H","I"]}
>>> [a+b for a in d['one'] for b in d['two']]
['AH', 'AI', 'BH', 'BI', 'CH', 'CI', 'DH', 'DI']


From raims at dot.com  Mon Aug 13 06:20:16 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Mon, 13 Aug 2007 12:20:16 +0200
Subject: check if var is dict
References: <mailman.1906.1186999320.22759.python-list@python.org>
Message-ID: <1i2sa4l.1s8guf1d5npcN%raims@dot.com>

Astan Chee <stanc at al.com.au> wrote:
> I have a variable, I want to check if it is a dictionary or a string.
> Is there any better way to do this than I've done. How I did it is by
> doing a .items() and catching a AttributeError that it raises if its not
> a dictionary.
> How do i properly do it?

One way is:

In [6]: isinstance(d, dict)
Out[6]: True

In [7]: isinstance("ciao", basestring)
Out[7]: True

This way you won't catch custom classes implementing dict or basestring
"protocols". In order to do that you can check if it implements the
right methods or treat the object as a dict or a string. It depends on
what you're trying to achieve.

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From johnmasters at oxtedonline.net  Sun Aug 19 14:13:09 2007
From: johnmasters at oxtedonline.net (John K Masters)
Date: Sun, 19 Aug 2007 19:13:09 +0100
Subject: Python equivalent of Perl's $/
Message-ID: <20070819181309.GC4841@spookie1.spookiegate>

I am currently working my way through Jeffrey Friedl's book Mastering
Regular Expressions. Great book apart from the fact it uses Perl for the
examples.

One particular expression that interests me is '$/ = ".\n"' which,
rather than splitting a file into lines, splits on a period-newline
boundary. Combined with Perl's 'while (<>)' construct this seems a great
way to process the files I am interested in.

Without wishing to start a flame war, is there a way to do this in Python?

Regards, John
-- 
War is God's way of teaching Americans geography
Ambrose Bierce (1842 - 1914)


From joshua at eeinternet.com  Wed Aug  1 20:35:35 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 01 Aug 2007 16:35:35 -0800
Subject: Is shelve/dbm supposed to be this inefficient?
References: <f8r62b$9lm$1@sea.gmane.org>
	<200708020208.53982.thomas@jollans.com>
Message-ID: <f8r8sn$ged$1@sea.gmane.org>

On Wednesday 01 August 2007 16:08, Thomas Jollans wrote:
> Have you considered a directory full of pickle files ? (In effect,
> replacing the dbm with the file system) i.e. something like (untested)
> 
> class DirShelf(dict):
<SNIP sample implementation of DirShelf>

A very interesting idea.  I'll have to see how that plays out
performance-wise.  Thanks for the idea, and the roughed-out code!

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From gagsl-py2 at yahoo.com.ar  Tue Aug 28 00:23:35 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 28 Aug 2007 01:23:35 -0300
Subject: Image.open( "C:\test.jpg") is this wrong ?
References: <CEFAE560FE3E3C458A2335A1AA37A82D06763937@MAIL2W2K3.WarrenNT.SaintFrancis.Loc>
Message-ID: <op.txq45llkx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 27 Aug 2007 11:48:46 -0300, Carnell, James E  
<jecarnell at saintfrancis.com> escribi?:

>> Image.open("C:\test.jpg")  # this is what I have right now. And it
>> can't find the file or directory. The file is there (it is everywhere
>> on my computer now!!!)

Use "C:\\test.jpg" or r"C:\test.jpg" or "C:/test.jpg" instead.
\t is interpreted as a tab character

> I found some code where they apply the file path to a variable in single
> quotes. Is that how it is done. Also I thought single quotes were for
> characters not strings.

a = 'This is a string'
b = "This is a string too"
c = """This is a
very long
string, spanning
several lines"""
d = '''This is
a multiline
string too'''
e = "e"
f = 'f'

You can read the relevant Tutorial section here  
<http://docs.python.org/tut/node5.html#SECTION005120000000000000000>

-- 
Gabriel Genellina



From bj_666 at gmx.net  Thu Aug 30 08:39:27 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 Aug 2007 12:39:27 GMT
Subject: Python doesn't see the directories I create
References: <ldvBi.293202$LE1.92748@newsfe13.lga>
	<46d6856b$0$17674$426a74cc@news.free.fr>
	<mailman.133.1188471584.28954.python-list@python.org>
	<46d6a72c$0$20532$426a74cc@news.free.fr>
	<mailman.134.1188473377.28954.python-list@python.org>
Message-ID: <5jns3vFdmbcU6@mid.uni-berlin.de>

On Thu, 30 Aug 2007 07:28:52 -0400, Steve Holden wrote:

> Bruno Desthuilliers wrote:
>> Steve Holden a ?crit :
>> Indeed. But I doubt a path starting with 'C:' will work fine on a 
>> unix-like environment anyway !-)
> 
> Just to be contrarian:
> 
> sholden at bigboy ~/Projects/python.org/build
> $ ls C:/Steve/
> Apache                          SANSsecurityOverview.pdf
> Apache2                         SQLServer.txt
>      ...
> Resume.odt                      todo.txt
> Resume.pdf                      untitled-1.py
> 
> sholden at bigboy ~/Projects/python.org/build
> 
> That's Cygwin, of course. Is that sufficiently "unix-like"? Though I 
> have to admit that the different utilities all take different approaches 
> to the use of Windows paths, and some just won't take them at all.

Even on Unix it shouldn't be a problem on most file systems to create a
directory named 'C:'

bj at s8n:~$ mkdir C:
bj at s8n:~$ touch C:/test.txt
bj at s8n:~$ ls -l C:
total 0
-rw-r--r-- 1 bj bj 0 2007-08-30 14:38 test.txt

:-)

Ciao,
	Marc 'BlackJack' Rintsch


From godzillaismad at gmail.com  Thu Aug 16 23:51:28 2007
From: godzillaismad at gmail.com (Godzilla)
Date: Thu, 16 Aug 2007 20:51:28 -0700
Subject: Memory leak when creating lots of object
In-Reply-To: <1187190827.395382.85740@57g2000hsv.googlegroups.com>
References: <1187067442.084074.55010@z24g2000prh.googlegroups.com>
	<1187190827.395382.85740@57g2000hsv.googlegroups.com>
Message-ID: <1187322688.545415.122010@i38g2000prf.googlegroups.com>

On Aug 16, 1:13 am, Paul  Moore <p.f.mo... at gmail.com> wrote:
> On 14 Aug, 05:57, Godzilla <godzillais... at gmail.com> wrote:
>
> > Hello,
>
> > I have a program that create and pop an object off a queue, but it is
> > experiencing some memory leakage. I have been unable to detect where
> > the memory leakage occur. The strange thing is when i replace the
> > object creation with a plain integer/string, the leak goes away...
> > Here's the code I used as my test:
> [...]
> > I can see the memory usage increases slowly in Task Manager under XP,
> > but do not know why. Anyone help?
>
> I tried your code on my (Windows XP SP2, Python 2.5) system. No memory
> leak here - I left it running for over 5 minutes and memory usage was
> static at just under 4MB.
>
> Do you see memory growth with precisely this code? Over what period?
> How much?
>
> Paul.

Hi Paul,

I have it running for more than 1 hour... the main application
software runs for about 50 days non stops and the memory just keep
growing...

I have a pdu.py class which has about 130 methods that's been created
on the fly. If you substitute the above code of PDU() init with the
pdu class from pdu.py, I see a dramatic increase in RAM in python
2.4.4! But not in version 2.5.1. So I upgraded to the latest
version... I still see the main application uses more and more memory
as the time goes by...

What should I do next? Can I force garbage collection manually? If so,
how do I do that?



From martin at v.loewis.de  Tue Aug  7 17:14:10 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 07 Aug 2007 23:14:10 +0200
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <87lkcnoydy.fsf@pobox.com>
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<87lkcnoydy.fsf@pobox.com>
Message-ID: <46b8e0a2$0$12255$9b622d9e@news.freenet.de>

> Do you *really* think that projects will fall 50-50 into the "yes" and
> "no" camps, as you seem to imply -- after all, if you thought that one
> case was more common, why wouldn't you mention which it was?

I know you didn't ask me this time, but I answer anyway: I don't know.

I *really* think that only experience can tell, and that any kind of
prediction on that matter is futile FUD (as FUD, it might be successful,
of course). I do so using all my skill and judgment. Only when people
actually start to try porting, list specific issues that they actually
ran into (rather than listing issues they anticipate to run into),
only then I can make guesses as to what the common case will be.

Ask this question a year from now again.

Regards,
Martin


From gnewsg at gmail.com  Thu Aug 23 15:01:03 2007
From: gnewsg at gmail.com (billiejoex)
Date: Thu, 23 Aug 2007 12:01:03 -0700
Subject: Impersonate another user temporarily (Unix and Windows)
In-Reply-To: <mailman.166.1187867611.32294.python-list@python.org>
References: <1187809798.274511.230240@z24g2000prh.googlegroups.com>
	<mailman.161.1187858227.32294.python-list@python.org>
	<1187866104.967297.324650@j4g2000prf.googlegroups.com>
	<mailman.166.1187867611.32294.python-list@python.org>
Message-ID: <1187895663.991360.224830@x40g2000prg.googlegroups.com>

On 23 Ago, 13:13, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/23/07, billiejoex <gne... at gmail.com> wrote:
>
>
>
>
>
> > On 23 Ago, 10:38, Tim Golden <m... at timgolden.me.uk> wrote:
> > > billiejoex wrote:
> > > > Hi there. I'm writing a modification for a FTP server library I'm
> > > > maintaining.
> > > > Depending on the system I'd want to temporarily impersonate the logged
> > > > user to perform actions on filesystem.
> > > > Something like:
>
> > > > try:
> > > >     change_user('user', 'password')
> > > >     os.rmdir('dir')
> > > > except:
> > > >     print "some error"
> > > > finally:
> > > >     change_user('old_user', 'password')
>
> > > > On Unix I took at look at os.seteuid() and os.setegid() functions and
> > > > I noticed they could be useful for my purpose.
> > > > On Windows I have no idea about how could I emulate a similar
> > > > behaviour.
> > > > Could someone please point me in the right direction?
>
> > > (Warning: not tried, but at least gives you the things to Google for!)
>
> > > You need the win32security module from the pywin32 extensions. [1]
> > > In particular, you want to look at the LogonUser and
> > > ImpersonateLoggedOnUser functions.
>
> > > TJG
>
> > > [1]http://pywin32.sf.net-Nascondi testo tra virgolette -
>
> > > - Mostra testo tra virgolette -
>
> > Thanks for suggestion.
> > I made it.
>
> Note that running your process as a user with enough priviledges to
> impersonate another user pretty much eliminates all the benefits of
> running as a low-priviledged user in the first place. Consider
> re-thinking your application model and having an "ftp" user instead.- Nascondi testo tra virgolette -
>
> - Mostra testo tra virgolette -

Could you be more precise?
Why it's not a good idea?
I was thinking of starting ftpd as limited user ('nobody'/'ftp' on
unix, 'Guest' on Windows), then temporary switching to another user
when I got to perform actions on file system.
Maybe you're saying that as limited user I can't do such switching?



From mail at microcorp.co.za  Wed Aug  1 02:55:43 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 1 Aug 2007 08:55:43 +0200
Subject: simple string backspace question
References: <1185875052.153091.23300@19g2000hsx.googlegroups.com><1185876068.755101.316320@b79g2000hse.googlegroups.com>
	<1185884227.491711.105160@x35g2000prf.googlegroups.com>
Message-ID: <014401c7d418$3273c520$03000080@hendrik>

"John Machin" <sjm...con.net> wrote:

> Point (2): Backspace??? YAGNI --- backspace hasn't been much use for
> anything (except when typing text) since the days when in order to get
> a bold letter (say X) on a character impact printer, one would
> transmit X\bX\bX ...

ooooooh!  Ugly!

Almost as bad as, on a golf ball printer:

"I am a little nodding man, I always nod my head..."

followed by an infinite loop of shift-in, shift-out characters.

- Hendrik



From andre.roberge at gmail.com  Thu Aug  2 10:49:32 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: Thu, 02 Aug 2007 14:49:32 -0000
Subject: Determining if file is valid image file
In-Reply-To: <1186065486.645871.175590@m37g2000prh.googlegroups.com>
References: <1186064098.587590.91210@g4g2000hsf.googlegroups.com>
	<1186064275.652416.250540@d55g2000hsg.googlegroups.com>
	<mailman.1510.1186065294.22759.python-list@python.org>
	<1186065486.645871.175590@m37g2000prh.googlegroups.com>
Message-ID: <1186066172.591814.215970@o61g2000hsh.googlegroups.com>

On Aug 2, 11:38 am, kyoso... at gmail.com wrote:
> On Aug 2, 9:35 am, Thomas Jollans <tho... at jollans.com> wrote:
>
>
>
> > On Thursday 02 August 2007, Andr? wrote:
>
> > > On Aug 2, 11:14 am, Andr? <andre.robe... at gmail.com> wrote:
> > > > Other than installing PIL, is there a "simple" way using Python only
> > > > to determine if a file is a valid image file?
>
> > > > I'd be happy if I could at least identify valid images files for gif,
> > > > jpeg and png.   Pointers to existing modules or examples would be
> > > > appreciated.
>
> > > > The reason why I'd prefer not using PIL is that I'd like to bundle
> > > > such a function/module in my app.
>
> > > I should have added: I'm interesting in validating the file *content*
> > > - not the filename :-)
>
> > The file name has nothing to do with the type :-P
>
> > A straightforward way you won't like: read the specs for all formats you're
> > interested in and write the function yourself ;-)
>
> Use the md5 module to create checksums. Links below:
>

Sorry, I fail to see how this helps me to identify if a file I
retrieve from somewhere is a valid image file...

> http://www.peterbe.com/plog/using-md5-to-check-equality-between-fileshttp://effbot.org/librarybook/md5.htmhttp://docs.python.org/lib/module-md5.html
>
> Larry is right too...what's wrong with bundling PIL or any third party
> module?
>

Why not bundling PIL?: Because I'm trying to keep the size of my app
as small as possible.
I don't mind bundling some other modules from third parties (in fact,
I already do include
three modules from ElementTree...).

Andr?

> Mike




From raims at dot.com  Sat Aug 18 21:27:42 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Sun, 19 Aug 2007 03:27:42 +0200
Subject: How to make a module function visible only inside the module?
References: <1187484334.091530.90420@m37g2000prh.googlegroups.com>
Message-ID: <1i32pg7.b0y3h92vjygwN%raims@dot.com>

beginner <zyzhu2000 at gmail.com> wrote:
> Is there any equivalent version of C's static function in Python. I
> know I can make a class function private by starting a function name
> with two underscores, but it does not work with module functions.

The trick for the name mangling does not work at module level. Anyway,
if you read the PEP 8 [1] you can correctly write your code following a
well known coding standard. A function like this:

def _f():
    pass

is meant to be private, you can also state it in the function's
docstring to be more clear, if you want, but it's not necessary

> For exmaple, __func1 is still visible outside the module.

Yes, and _f() will also be. There's no such thing as enforcing
encapsulation in Python, even the "__method()" trick can be easily
bypassed if you have to.

1 - <http://www.python.org/dev/peps/pep-0008/>

HTH

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From zzbbaadd at aol.com  Thu Aug 30 13:56:28 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Thu, 30 Aug 2007 10:56:28 -0700
Subject: list index()
In-Reply-To: <46d674c2$0$417$426a34cc@news.free.fr>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
Message-ID: <1188496588.750629.208100@g4g2000hsf.googlegroups.com>

On Aug 30, 12:42 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> zzbba... at aol.com a ?crit :
>

> What's with using your brain instead of whining ?

I knew there would be at least one religious zealot.




From steve at holdenweb.com  Wed Aug  8 08:52:59 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Aug 2007 08:52:59 -0400
Subject: Something in the function tutorial confused me.
In-Reply-To: <5hsoi3F3mlni2U1@mid.individual.net>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>	<46B8626A.2070303@bigfoot.com>	<mailman.1726.1186537161.22759.python-list@python.org>
	<5hsoi3F3mlni2U1@mid.individual.net>
Message-ID: <f9ceb9$jsm$1@sea.gmane.org>

greg wrote:
> Steve Holden wrote:
>> OK. The difference is that [] is a mutable value, while None is 
>> immutable.
> 
> No, it's not. It has nothing to do with mutability
> vs immutability.
> 
I beg to differ. That has everything to do with it.

> The difference is that in the first version the
> expression [] is evaluated only *once*, when the
> function is defined. Therefore there is just one
> list object getting re-used.
> 
In exactly the same way that with a default value of None just one None 
value is being re-used. The difference is that you have no way to nutate 
that value in place, whereas with a list object you can indeed do that.

> In the second version, the expression [] gets
> evaluated *each* time the function is called,
> creating a new list object each time.
> 
Correct.

>> When the function starts out with None as y's value any assignment to y 
>> causes it to reference a different value  (since None is immutable).
> 
> You're confused. Assigning to y simply causes it
> to reference whatever object is being assigned.
> This is always true, regardless of what y was
> referencing before.
> 
While it's correct that rebinding y will usually cause it to reference a 
different object, this need not be true of assignment. The augmented 
assignment operations do no necessarily rebind their left-hand operand - 
that depends on the implementation of the relevant method in whatever 
type is the subject of the augmented assignment.

An *assignment* to y therefore *usually* rebinds the name y to point to 
a different value. A *mutation* of the object *referenced* by y leaves y 
pointing to the same value. This is why appends to a default list 
argument are visible in later calls: because each call initializes y to 
reference the single object that was provided as the default value, 
which has been changed by previous calls.

> To see that the immutability of None has nothing
> to do with it, try the following version:
> 
> def f(x, y = []):
>    y = []
>    y.append(x)
>    print y
> 
> f(17)
> f(42)
> 
> Try to work out what it will do, then try it, and
> see if you understand why it does what it does.
> 
I know exactly what it will do without running it, thank you. Each call 
will return a single-valued list. It's hardly relevant, though since the 
value of the default argument isn't used anywhere in the function body. 
You are correct in stating that the [] construct always creates a new 
list. However, your explanation of why a list as a default argument 
retains mutations in further calls seems to me to omit some important 
details.

For some reason your reply got right up my nose, so I have had to 
restrain the impulse to be unpleasant. I'm left wondering if that's 
because of something in your reply (such as your assumption that your 
understanding of this situation is superior to mine) or because I got 
out of the wrong side of bed this morning. I'm currently giving you the 
benefit of the doubt, and going for another cup of coffee.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From michael at jedimindworks.com  Thu Aug  9 06:26:45 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Thu, 9 Aug 2007 03:26:45 -0700
Subject: Launching App
In-Reply-To: <00e301c7da6c$51ee3fc0$f5cabf40$@rawlins@thinkbluemedia.co.uk>
References: <00e301c7da6c$51ee3fc0$f5cabf40$@rawlins@thinkbluemedia.co.uk>
Message-ID: <4FE6546B-782B-41CA-A037-82D634E6C7ED@jedimindworks.com>


On Aug 9, 2007, at 3:01 AM, Robert Rawlins - Think Blue wrote:

> I?m looking for the best method to launch my python app when my  
> Linux system boots up. At the moment I just have an entry like this  
> in my rc.local file:
>
> CD /myfolder/anotherfolder
>
> ./myapp.py
>
>
>
> Is this the best way to do this? Or is there a better way? I feel  
> like a bit of a dummy asking this question, I just wanted to ensure  
> the best method.
A better way is to use the SYSV init system: create a start/stop/ 
status script for your app in /etc/init.d (use existing scripts in  
that directory for examples of what you can do). On Debian, you can  
then use update-rc.d to create the appropriate symlinks.

hope this helps,
Michael

---
Debugging is twice as hard as writing the code in the first place.   
Therefore, if you write the code as cleverly as possible, you are, by  
definition, not smart enough to debug it. --Brian W. Kernighan


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From joevans at gmail.com  Wed Aug 22 22:07:16 2007
From: joevans at gmail.com (Jason Evans)
Date: Wed, 22 Aug 2007 19:07:16 -0700
Subject: Parser Generator?
In-Reply-To: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
Message-ID: <1187834836.115735.111160@e9g2000prf.googlegroups.com>

On Aug 18, 3:22 pm, "Jack" <nos... at invalid.com> wrote:
> Hi all, I need to do syntax parsing of simple naturual languages,
> for example, "weather of London" or "what is the time", simple
> things like these, with Unicode support in the syntax.
>
> In Java, there are JavaCC, Antlr, etc. I wonder what people use
> in Python? Antlr also has Python support but I'm not sure how good
> it is. Comments/hints are welcome.

I use Parsing.py.  I like it a lot, probably because I wrote it.

    http://www.canonware.com/Parsing/

Jason



From aleax at mac.com  Sun Aug 26 11:52:56 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 26 Aug 2007 08:52:56 -0700
Subject: Need a better understanding on how MRO works?
References: <mailman.295.1188079346.32294.python-list@python.org>
	<1i3evke.1rwf8pn10k1h30N%aleax@mac.com>
	<mailman.0.1188096859.28954.python-list@python.org>
	<1i3f78x.1pxexgx6emjfhN%aleax@mac.com>
	<mailman.5.1188129368.28954.python-list@python.org>
Message-ID: <1i3g2cb.1vtfo65u1a072N%aleax@mac.com>

Steven W. Orr <steveo at syslang.net> wrote:
   ...
> =>accepts whatever dictionary you give it (so you can, though shouldn't,
> =>do strange things such as pass globals()...:-).
> 
> In fact, I wanted to make a common routine that could be called from 
> multiple modules. I have classes that need to be created from those 
> multiple modules. I did run into trouble when I created a common routine
> even though I passed globals() as one of the args. The """though 
> shouldn't""" is prompting me to ask why, and where I might be able to read
> more.

The dictionary you pass to new.classobj should be specifically
constructed for the purpose -- globals() will contains all sort of odds
and ends that have nothing much to do with the case.

You appear to be trying to embody lot of black magic in your "common
routine", making it communicate with its callers by covert channels; the
way you use globals() to give that routine subtle "side effects" (making
the routine stick entries there) as well as pass it an opaque,
amorphous, unknown blobs of input information, strongly suggests that
the magic is running away with you (a good general reference about that
is <http://video.google.com/videoplay?docid=4611491525028588899>).

"Explicit is better than implicit", "simple is better than complex",
etc, can be read by typing ``import this'' at an interactive Python
prompt.

The best book I know about the do's and don't's of large-scale software
architecture is Lakos' "Large-Scale C++ Software Design",
<http://www.amazon.com/Large-Scale-Software-Design-John-Lakos/dp/0201633
620> -- very C++ specific, but even though some of the issues only apply
to C++ itself, many of its crucial lessons will help with large scale SW
architecture in just about any language, Python included.

What I had to say about the lures and pitfalls of black magic in Python
specifically is spread through the Python Cookbook 2nd edition (and, to
a lesser extent, Python in a Nutshell).


Alex


From kyosohma at gmail.com  Thu Aug  2 14:01:08 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 02 Aug 2007 18:01:08 -0000
Subject: Email
In-Reply-To: <1186076005.729346.327140@z24g2000prh.googlegroups.com>
References: <1186076005.729346.327140@z24g2000prh.googlegroups.com>
Message-ID: <1186077668.315353.172360@x35g2000prf.googlegroups.com>

On Aug 2, 12:33 pm, Rohan <vodela.... at gmail.com> wrote:
> I was wondering if there could be an arrangement where a file could be
> attached and send as an email.
> For ex
> f = open(add.txt,w)
> f.write('python')
> f.close()
>
> Now I would like to send an email with add.txt as an attachment, is it
> possible ?
> some one give me a pointer towards this.

Try looking up the email module.

http://docs.python.org/lib/node162.html

Mike



From horpner at yahoo.com  Mon Aug 27 14:20:33 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 27 Aug 2007 18:20:33 GMT
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csoronscqp7d2@corp.supernews.com>
	<1188090322.663217.102750@22g2000hsm.googlegroups.com>
	<13d4bucfm4m1lc4@corp.supernews.com>
	<mailman.13.1188182594.28954.python-list@python.org>
	<13d4gjm3qq0lt7c@corp.supernews.com>
Message-ID: <slrnfd5kt4.b0.horpner@FIAD06.norwich.edu>

On 2007-08-27, bambam <david at asdf.asdf> wrote:
> Thank you, I have been through the tutorial several times, I
> guess I'm just not smart enough. Perhaps I have been led astray
> by what I read here?
>
> My code started like this:
>
> for i in range(self.parent.GetPageCount()):
>
> I was asked:
>
>> Does page count change? i.e. is it necessary to retrieve it in
>> every loop
>
> Is self.parent.GetPageCount() 'retrieved every loop'?

No. The question seems to imply that if you wish it to be
retrieved every loop you must change the code to something else.

i = 0
while i < self.parent.GetPageCount():
  # do stuff
  i += 1

I find that kind of while loop clunky. Since Python is
hard-headed about not providing a structured looping construct,
you may feel the need to compose your own special-purpose
iterator or generator instead.

def pageCountGenerator(document):
  i = 0
  while i < document.GetPageCount():
    yield i
    i += 1

It can be used like this:

for i in pageCountGenerator(self.parent):
  # do stuff

That way you get the happy syntax of a for loop, with the
additional safety of checking the page count each iteration.

This sort of suggests a direct solution:

for i in xrange(self.parent.GetPageCount()):
  if i >= self.parent.GetPageCount():
    break
  # do stuff

At least that way you're spared the manual manipulation of i.

-- 
Neil Cerutti


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  2 05:30:35 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 02 Aug 2007 11:30:35 +0200
Subject: a dict trick
In-Reply-To: <1186043222.732234.152550@d30g2000prg.googlegroups.com>
References: <1186036331.304916.304020@e9g2000prf.googlegroups.com>
	<mailman.1492.1186042512.22759.python-list@python.org>
	<1186043222.732234.152550@d30g2000prg.googlegroups.com>
Message-ID: <46b1a43b$0$20425$426a74cc@news.free.fr>

james_027 a ?crit :
> Hi,
> 
> what if we're not dealing with dict? is there a pythonic way of doing
> ternary? the bool ? x:y

Python 2.5 introduced the following syntax:

expr1 if condition else expr2

In older Python versions, one has to use and/or (like you wrongly did) 
or tuple/dict dispatch or other ad-hoc tricks. Or use a plain old 
if/else branch.


From martin at v.loewis.de  Tue Aug 28 13:13:31 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 28 Aug 2007 19:13:31 +0200
Subject: sys.setdefaultencoding
In-Reply-To: <mailman.72.1188320649.28954.python-list@python.org>
References: <mailman.72.1188320649.28954.python-list@python.org>
Message-ID: <46D457BB.6020809@v.loewis.de>

> Is there a way to allow the process to specify that unicode-->str should
> use 'utf8' rather than 'ascii' in all non-specific cases?

No. Things might break if you change the default encoding to anything
but ASCII, and more so if you do that "at runtime". For example,
dictionaries with Unicode keys may stop working, and the cached
byte-oriented version of a Unicode string may become incorrect.

In general, programs and libraries should not rely on the default
encoding for anything. Instead, they should convert explicitly,
either from an explicitly specified encoding, or one derived from
the context. Experience has shown that this is possible in nearly
every case (and in all cases if an appropriate refactoring is made).

Regards,
Martin


From cjw at sympatico.ca  Wed Aug 15 16:00:04 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Wed, 15 Aug 2007 16:00:04 -0400
Subject: sub-classing the types in the builtin module datetime
In-Reply-To: <46C33DFF.90704@jayloden.com>
References: <f9v86f$s14$1@sea.gmane.org> <46C33DFF.90704@jayloden.com>
Message-ID: <46C35B44.5020406@sympatico.ca>

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From gagsl-py2 at yahoo.com.ar  Mon Aug 20 03:33:00 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Aug 2007 04:33:00 -0300
Subject: Importing DLLs
References: <7603657D433B034AB667802696450A3EAA6161@MAIL2.api.com>
Message-ID: <op.txcklagkx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Wed, 15 Aug 2007 14:20:26 -0300, Corbitt, Kyle <kcorbitt at api.com>  
escribi?:

> I'm running Linux with Python 2.3.  I have a C shared object file (*.so)  
> and I need to be able to call its functions from within Python.  I have  
> found a couple of Python modules that allow me to do this (dl, ctypes)  
> but unfortunately I am only able to get them to return integers, even  
> for function calls that I KNOW the library is supposed to return other  
> types for.  I need the library to be able to return doubles, 2D arrays

Use the ctypes module. Read the tutorial - you have to set the restype  
attribute on functions.

-- 
Gabriel Genellina



From nick at craig-wood.com  Sat Aug 11 10:30:05 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 11 Aug 2007 09:30:05 -0500
Subject: The Future of Python Threading
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<5i329uF3muir4U1@mid.individual.net>
	<slrnfbou9k.vkb.nick@irishsea.home.craig-wood.com>
	<5i45luF3mvdesU1@mid.individual.net>
Message-ID: <slrnfbrg68.dpo.nick@irishsea.home.craig-wood.com>

Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote:
>  Nick Craig-Wood wrote:
>  [GIL]
> > That is certainly true.  However the point being is that running
> > on 2 CPUs at once at 95% efficiency is much better than running on
> > only 1 at 99%...
> 
>  How do you define this percent efficiency?

Those are hypothetical numbers.  I guess that a finely locked python
will spend a lot more time locking and unlocking individual objects
than it currently does locking and unlocking the GIL.  This is for two
reasons

1) the GIL will be in cache at all times and therefore "hot" and quick
to access

2) much more locking and unlocking of each object will need to be
done.

> >>> The truth is that the future (and present reality) of almost
> >>> every form of computing is multi-core,
> >> 
> >>  Is it? 8)
> > 
> > Intel, AMD and Sun would have you believe that yes!
> 
>  Strange, in my programs, I don't need any "real" concurrency (they
>  are network servers and scripts). Or do you mean "the future of
>  computing hardware is multi-core"? That indeed may be true.

I meant the latter.  I agree with you though that not all programs
need to be multi-threaded.  Hence my proposal for two python binaries.

> >>  The question is: If it really was, how much of useful
> >>  performance gain would you get?
> > 
> > The linux kernel has been through these growing pains already... 
> > SMP support was initially done with the Big Kernel Lock (BKL)
> > which is exactly equivalent to the GIL.
> 
>  So, how much performance gain would you get? Again, managing
>  fine-grained locking can be much more work than one simple lock.

Assuming that you are not IO bound, but compute bound and that compute
is being done in python then you'll get a speed up proportional to how
many processors you have, minus a small amount for locking overhead.

> > The linux kernel has moved onwards to finer and finer grained
> > locking.
> 
>  How do you compare a byte code interpreter to a monolithic OS
>  kernel?

In this (locking) respect they are quite similar actually.  You can
think of kernel code as being the python interpreter (BKL vs GIL),
user space being as C extensions running with the GIL unlocked and
calling back into the python interpreter / kernel.

> > I'd like to see a python build as it is at the moment and a
> > python-mt build which has the GIL broken down into a lock on each
> > object. python-mt would certainly be slower for non threaded
> > tasks, but it would certainly be quicker for threaded tasks on
> > multiple CPU computers.
> 
>  From where do you take this certainty? For example, if the program
>  in question involves mostly IO access, there will be virtually no
>  gain. Multithreading is not Performance.

Yes you are right of course.  IO bound tasks don't benefit from
multi-threading.  In fact usually the reverse.  Twisted covers this
ground extremely well in my experience.  However IO bound tasks
probably aren't taxing your quad core chip either...

> > The user could then choose which python to run.
> > 
> > This would of course make C extensions more complicated...
> 
>  Also, C extensions can release the GIL for long-running
>  computations.

Provided they stay in C.  If they call any python stuff then they need
to take it again.

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


From nyamatongwe+thunder at gmail.com  Thu Aug 30 18:25:37 2007
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Thu, 30 Aug 2007 22:25:37 GMT
Subject: pure python for sms 
In-Reply-To: <mailman.161.1188500323.28954.python-list@python.org>
References: <mailman.161.1188500323.28954.python-list@python.org>
Message-ID: <BtHBi.28617$4A1.5445@news-server.bigpond.net.au>

Gerardo Herzig:

> Hi dudes. Im looking for a python implementation for sending sms to a 
> cell phone. I was try using some free pages, but i want to use a python. 
> Do i need a cellphone conected to my machine? Or can i send sms to some 
> cell via some python library?

    This is likely to cost some money similar to sending an SMS from a 
'phone. There are several companies that provide SMS sending services 
that can be accessed through HTTP. Have a look at www.clickatell.com and 
www.aql.com . Here is a library based on Clickatell:
http://www.powertrip.co.za/code/python/clickatell.py

    Neil


From dwahler at gmail.com  Wed Aug 15 16:17:41 2007
From: dwahler at gmail.com (David Wahler)
Date: Wed, 15 Aug 2007 15:17:41 -0500
Subject: encrypting files + filestreams?
In-Reply-To: <1187186797.579680.206820@19g2000hsx.googlegroups.com>
References: <1187186797.579680.206820@19g2000hsx.googlegroups.com>
Message-ID: <dad14b100708151317g7988d3b0xf1c1155077252b6d@mail.gmail.com>

On 8/15/07, per9000 <per9000 at gmail.com> wrote:
> Hi python people,
>
> I am trying to figure out the best way to encrypt files in python.
>
> I've build a small script (see below) that encrypts the ubuntu 7.04
> iso file in 2 minutes (I like python :) ).
>
> But I have some thoughts about it. By pure luck (?) this file happened
> to be N*512 bytes long so I do not have to add crap at the end - but
> on files of the size N*512 + M (M != 521) I will add some crap to make
> it fit in the algorithm. When I later decrypt I will have the stuff I
> do not want. How do people solve this? (By writing the number of
> relevant bytes in readable text in the beginning of the file?)

The term you're looking for is "padding". See
http://en.wikipedia.org/wiki/Padding_%28cryptography%29 for a brief
introduction, and especially the two RFCs mentioned about halfway
down.

> Also I wonder if this can be solved with filestreams (Are there
> streams in python? The only python file streams I found in the evil
> search engine was stuff in other forums.)

I don't know how to answer this, because it's not clear what you mean
by "file streams". Python's file objects act similarly to things
called streams in other languages, such as Java's InputStreams and
Readers, if that's what you're asking.

> Other comments are of course also welcome,
> Per
>
>
> # crypto_hardcoded.py starts here
[snip]

I notice there's some repeated code in your main loop. This generally
means there's room for improvement in your program flow. Here's one
possible way you could structure it: separate out the file reading and
padding logic into a generator function that takes a filename or file
object, and yields blocks one at a time, padded to the correct block
size. Then your main loop can be simplified to something like this:

for plaintext_block in read_as_blocks(in_file, block_size):
    ciphertext_block = cryptor.encrypt(plaintext_block)
    out_file.write(ciphertext_block)

Techniques like these can make it easier to follow what's going on,
especially as your programs get more complicated. Don't be afraid to
experiment!

-- David


From cetiri at gmail.com  Thu Aug 16 14:24:04 2007
From: cetiri at gmail.com (cetiri at gmail.com)
Date: Thu, 16 Aug 2007 11:24:04 -0700
Subject: Tuning - Styling
Message-ID: <1187288644.599015.290100@57g2000hsv.googlegroups.com>

Cool cars, tuning & styling, modified cars, many upgrades here...

http://tuning-styling.blogspot.com/



From franz.steinhaeusler at gmx.at  Sun Aug  5 06:14:38 2007
From: franz.steinhaeusler at gmx.at (Franz Steinhäusler)
Date: Sun, 05 Aug 2007 12:14:38 +0200
Subject: Best programs written completly in Python
Message-ID: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>

Hello NG,

wWhat are the best programs in your opinion, written entirly
in pyhton, divided into categories like:
a) Games
b) Utilities/System
c) Office
d) Web/Newsreader/Mail/Browser
...

I don't want to start a long thread, if a site of such
an discussion already exists, a link will be enough.

Many thanks in advance!

-- 
Franz Steinhaeusler


From tzuchien.chiu at gmail.com  Wed Aug 22 05:50:16 2007
From: tzuchien.chiu at gmail.com (tzuchien <dot> chiu <at> gmail <dot> com)
Date: Wed, 22 Aug 2007 02:50:16 -0700
Subject: Design philosophy of HTTPServer and BaseHTTPRequestHandler
Message-ID: <1187776216.269456.310230@q4g2000prc.googlegroups.com>

Hello, everyone.

Several instances of a same script, which accepts parameters and does
a lengthy job, are executed on a remote machine. I want to couple the
script with a tiny HTTP server so that I can connect to the machine
with a browser and monitor the progress of jobs. The HTTP server of
each instance will bind to different ports.

A BaseHTTPRequestHandler-derived class must somehow know the
parameters of each instance/job in order to return instance/job-
specific result back to the client in do_GET. However, there is no way
to pass parameters (of the lengthy job) because the constructor of
HTTPServer expects a BaseHTTPRequestHandler-derived "class", instead
of an "object".

I cannot (or should not) dynamically create a "BaseHTTPRequestHandler-
derived "class" for each instance of the script, right?

Do I misunderstand the design philosophy of HTTPServer and
BaseHTTPRequestHandler, and they should not be used in this way?



From tkpmep at hotmail.com  Tue Aug 28 10:03:29 2007
From: tkpmep at hotmail.com (tkpmep at hotmail.com)
Date: Tue, 28 Aug 2007 07:03:29 -0700
Subject: int/long bug in locale?
Message-ID: <1188309809.592078.58960@22g2000hsm.googlegroups.com>

To pretty up some numbers stored as strings, I used locale to format
them with commas. I then found the following error:

>>> import locale

>>>locale.setlocale(locale.LC_ALL, 'English_United States.1252')
'English_United States.1252'

>>> locale.format('%d', float('2244012500.0000'), grouping = True)

Traceback (most recent call last):
  File "<pyshell#28>", line 1, in <module>
    locale.format('%d', float('2244012500.0000'), grouping = True)
  File "C:\Python25\lib\locale.py", line 145, in format
    formatted = percent % value
TypeError: int argument required

However, if the number is <= 2**31-1, it works just fine:
>>>locale.format('%d', float('224401250.0000'), grouping = True)
'224,401,250'

Interestingly, if I first convert the floats to ints, , the function
works just fine, even if the numbers exceed 2**31-1:
>>> locale.format('%d', int(float('2244012500.0000')), grouping = True)
'2,244,012,500'

Is there an int/long related bug lurking in locale?

Sincerely

Thomas Philips



From zyzhu2000 at gmail.com  Wed Aug  1 14:01:51 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Wed, 01 Aug 2007 18:01:51 -0000
Subject: Assertion in list comprehension
In-Reply-To: <mailman.1447.1185989928.22759.python-list@python.org>
References: <1185982643.001546.138180@e16g2000pri.googlegroups.com>
	<mailman.1439.1185985738.22759.python-list@python.org>
	<46b0bb19$0$14060$9b622d9e@news.freenet.de>
	<mailman.1447.1185989928.22759.python-list@python.org>
Message-ID: <1185991311.411744.182890@x35g2000prf.googlegroups.com>

On Aug 1, 12:38 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> On 01 Aug 2007 16:55:53 GMT, Stargaming <stargam... at gmail.com> wrote:
>
>
>
>
>
> > On Wed, 01 Aug 2007 11:28:48 -0500, Chris Mellon wrote:
>
> > > On 8/1/07, beginner <zyzhu2... at gmail.com> wrote:
> > >> Hi,
>
> > >> Does anyone know how to put an assertion in list comprehension? I have
> > >> the following list comprehension, but I want to use an assertion to
> > >> check the contents of rec_stdl. I ended up using another loop which
> > >> essentially duplicates the functions of list comprehension. It just
> > >> look like a waste of coding and computer time to me.
>
> > >> I just wish I could put the assertions into list comprehensions.
>
> > >>         x=[(rec_stdl[0].st/10000.0,
> > >>             rec_stdl[0].cl,
> > >>             rec_stdl[0].bb,
> > >>             rec_stdl[0].bo,
> > >>             rec_stdl[1].bb,
> > >>             rec_stdl[1].bo,
> > >>             rec_stdl[0].ex
> > >>            )
> > >>            for rec_stdl in rec_by_ex if len(rec_stdl)==2
> > >>         ]
>
> > >>         #duplicated loop
> > >>         if __debug__:
> > >>             for rec_stdl in rec_by_ex:
> > >>                 l=len(rec_stdl)
> > >>                 assert(l<=2 and l>0)
> > >>                 if l==2:
> > >>                     assert(rec_stdl[0].c=="C" and rec_stdl[1].c=="P")
> > >>                     assert(rec_stdl[0].ex==rec_stdl[1].ex)
> > >>                     assert(rec_stdl[0].st==rec_stdl[1].st)
> > >>                     assert(rec_stdl[0].cp==rec_stdl[1].cp)
>
> > > First: All your asserts are wrong. Assert is a statement, not a
> > > function. These specific ones will behave as expected, but it's easy to
> > > accidentally write ones that always pass this way.
>
> > Could you come up with an example? I can only think of accidentally
> > injecting a comma, what would create a (true, in a boolean context) tuple.
>
> > And, well, if you're only using () for readabilty, this might sometimes
> > look messy when calling assert with the extended syntax::
>
> >   assert(False), "error text"
>
> It's very easy to write this as assert(False, "error text") if you're
> in the habit of thinking that assert is a function.
>
> > Where one could expect the construction of a tuple.
>
> > > Secondly: This is a waste of code, because if __debug__ is not defined
> > > asserts will be skipped by the compiler. You could use the same loop
> > > block for both branches.
>
> > Well, the `assert` isn't there for no reason, but if you're serious about
> > it, `raise` could be better.
>
> > > Thirdly: This sort of testing is precisely what unit tests and/or
> > > doctests are for.
>
> > Huh? What beginner is doing there seems more like input validation than
> > testing. Unit or doctests are meant for testing (and in case of doctests,
> > showing) whether a function works as expected.
>
> Not in a big __debug__ block it isn't.


No I was trying to test the logic of my code not validating the
contents of the data. Thanks.

>
>
> > --
> >http://mail.python.org/mailman/listinfo/python-list- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -




From rvtol+news at isolution.nl  Sat Aug 11 11:53:11 2007
From: rvtol+news at isolution.nl (Dr.Ruud)
Date: Sat, 11 Aug 2007 17:53:11 +0200
Subject: I am giving up perl because of assholes on clpm -- switching to
	Python
References: <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d@giganews.com>
	<f8b0gs$4rp$1@solaris.cc.vt.edu>
	<7x4pjq7v69.fsf@ruckus.brouhaha.com>
	<46aa1986$0$31715$db0fefd9@news.zen.co.uk>
Message-ID: <f9kt3u.1d8.1@news.isolution.nl>

RedGrittyBrick schreef:

> treasure the saints, tolerate the irritable and
> ignore the whiners.

*You are what you read.* What is "irritating" to some, is "to the point"
to others.

That should say enough, but some people just can not stand short
replies, they can not hold themselves back from reading all negative
kinds of things into them. Too little attention maybe? (I am just making
the same mistake to show how it works.)

Only rarely someone mistakes the "to the point" for the "irritating",
without acknowledging their mistake in the first or second next reply.
Newbies with the wrong focus, under pressure, probably suffering lack of
sleep? (I am just making things worse.)

-- 
Affijn, Ruud

"Gewoon is een tijger."



From sbellon at sbellon.de  Thu Aug  2 16:30:26 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Thu, 2 Aug 2007 22:30:26 +0200
Subject: Catching SystemExit in C API code when embedding Python?
References: <20070802141906.2581c099@cube.tz.axivion.com>
	<m%psi.3186$Mu5.909@newsfe15.phx>
	<20070802212949.222081eb@cube.tz.axivion.com>
	<Bnqsi.3187$Mu5.389@newsfe15.phx>
Message-ID: <20070802223026.6e931e0e@cube.tz.axivion.com>

On Thu, 02 Aug, Farshid Lashkari wrote:

> You cannot use PyRun_SimpleString, since it will automatically print
> and clear the error. You will need to use PyRun_String instead.

Thanks, that helps a lot!

-- 
Stefan Bellon


From dobedani at gmx.net  Wed Aug  1 09:04:05 2007
From: dobedani at gmx.net (Dobedani)
Date: Wed, 01 Aug 2007 06:04:05 -0700
Subject: Plain old SAX and minidom useable? But how then?
In-Reply-To: <46B07C0B.70507@web.de>
References: <1185969539.653078.287360@w3g2000hsg.googlegroups.com>
	<46B07C0B.70507@web.de>
Message-ID: <1185973445.185359.173130@q75g2000hsh.googlegroups.com>

Darsten and Stefan,

Yeah, thank you very much! I actually found a good example at
http://www.python.org/doc/2.4/lib/dom-example.html

Your input was also helpful, so now I have been able to "walk" through
the XML and to retrieve the text strings I need:

doc = parse(configfile);
elems = doc.getElementsByTagName("Environment")
for elem in elems:
    name = elem.getElementsByTagName("Name")[0];
    if getText(name.childNodes) == "workspace":
        ...

with getText as defined on the webpage referenced above.

Kind regards,
Dobedani


http://www.python.org/doc/2.4/lib/dom-example.html

On Aug 1, 2:26 pm, Stefan Behnel <stefan.behnel-n05... at web.de> wrote:
> Hi,
>
> calm down, minidom is not easy to use, but it can solve your problem.
>
> Dobedani wrote:
> > I guess I don't know where to look for the right information. I hope
> > you guys can help me on the way. I want to retrieve a string from an
> > XML-file. If Python were to have XPath available, my problem would be
> > solved. The xquery string would be enough and I have already obtained
> > that the string. The problem is that I cannot use any add-on - like
> > xmllib, sax2 or elementtree - as my customers only have the so-called
> > stock Python install - i.e. version 2.4.1.
>
> Too bad, that rules out lxml.etree (which has XPath and loads of other goodies).
>
> > Please: where then can I find examples of such use? If I cannot use
> > xpath, I would not mind to browse a bit - e.g. using functions like
> > getElementByTag() but I don't even know how to use those. TIA
>
> Try one of these (I looked for "minidom example"):
>
> http://www.faqs.org/docs/diveintopython/kgp_parse.html
> http://docs.python.org/lib/dom-example.html
> http://www.cutthecrap.biz/software/whitepapers/minidom.html
>
> Maybe that helps?
>
> Stefan




From gnewsg at gmail.com  Wed Aug 29 07:25:07 2007
From: gnewsg at gmail.com (billiejoex)
Date: Wed, 29 Aug 2007 04:25:07 -0700
Subject: tempfile.mkstemp and os.fdopen
In-Reply-To: <slrnfdahbj.aai.nick@irishsea.home.craig-wood.com>
References: <1188323759.955043.317630@19g2000hsx.googlegroups.com>
	<Michael.J.Fromberger-8FC07C.15483428082007@localhost>
	<fb37s6$p1s$1@lust.ihug.co.nz>
	<slrnfdahbj.aai.nick@irishsea.home.craig-wood.com>
Message-ID: <1188386707.823517.212990@19g2000hsx.googlegroups.com>

Gabriel Genellina wrote:

> As someone already suggested, why don't you use TemporaryFile or
> NamedTemporaryFile and avoid such problems?

Because I don't want file to be removed after closing.



From koen.vanleemput at gmail.com  Thu Aug 30 09:53:01 2007
From: koen.vanleemput at gmail.com (koen.vanleemput at gmail.com)
Date: Thu, 30 Aug 2007 13:53:01 -0000
Subject: Sorting a list of Unicode strings?
In-Reply-To: <1187608388.772541.251860@22g2000hsm.googlegroups.com>
References: <1187542237.139346.6910@o80g2000hse.googlegroups.com>
	<1187608388.772541.251860@22g2000hsm.googlegroups.com>
Message-ID: <1188481981.972728.18020@o80g2000hse.googlegroups.com>

Wikipedia in Suomi lists it at the bottom ;-)

http://sv.wikipedia.org/wiki/Lista_%C3%B6ver_l%C3%A4nder#.C3.85

Cheers
~K



From greg at cosc.canterbury.ac.nz  Sat Aug 11 02:05:57 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sat, 11 Aug 2007 18:05:57 +1200
Subject: Threaded Design Question
In-Reply-To: <1186788302.998913.76720@d30g2000prg.googlegroups.com>
References: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
	<oMGdnd2xodjScCbbnZ2dnUVZ_uydnZ2d@comcast.com>
	<1186788302.998913.76720@d30g2000prg.googlegroups.com>
Message-ID: <5i525dF3kqj4nU1@mid.individual.net>

half.italian at gmail.com wrote:
> I ended up taking this route for the most part.  The worker thread
> first moves the file to be processed into a temp directory,

No, the watcher thread should do this itself *before*
putting it into the work queue. Then there's no chance
of it picking up the same file twice before a worker
has gotten around to working on it, and there is no
need for a custom queue class.

--
Greg


From horpner at yahoo.com  Thu Aug 16 11:59:33 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 16 Aug 2007 15:59:33 GMT
Subject: Who told str() to round my int()'s!!!
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
	<9qmvi.47364$s5.1537219@phobos.telenet-ops.be>
	<mailman.1857.1186861157.22759.python-list@python.org>
	<3ZudnUuJ68lcxl7bnZ2dnUVZ_t_inZ2d@comcast.com>
	<slrnfc7sot.1aa.hat@se-162.se.wtb.tue.nl>
	<zd_wi.14608$eY.8264@newssvr13.news.prodigy.net>
Message-ID: <slrnfc8tas.1hg.horpner@FIAD06.norwich.edu>

On 2007-08-16, John Nagle <nagle at animats.com> wrote:
>>>or the mildy amusing "how do I write bytes not characters to a
>>>file" questions at least once a week on this forum.
>
>     Actually, that's a reasonable question, and one that Python didn't do
> quite right.
>
>     Remember, in the beginning, Python had only ASCII strings, which
> were equivalent to arrays of bytes.  Then came Unicode strings.  Then
> came the restriction of ASCII chars to 0..127.  Except that you can
> still store binary bytes in ASCII strings, subject to some limitations.
>
>     The next logical step is a complete separation of binary data handling
> from text string handling, probably using some type in "numarray" for
> arrays of bytes.

Python 3000 makes unicode the standard string type, and ushers in
a new type name for the old str type called, I think, 'bytes'. So
the 3000 devs seem to agree with you to some extent.

-- 
Neil Cerutti
Ushers will eat latecomers. --Church Bulletin Blooper


From gtcopeland at gmail.com  Tue Aug 21 15:47:38 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: Tue, 21 Aug 2007 12:47:38 -0700
Subject: Shed Skin Python-to-C++ compiler 0.0.23
In-Reply-To: <mailman.3.1187613108.26576.python-list@python.org>
References: <mailman.3.1187613108.26576.python-list@python.org>
Message-ID: <1187725658.819624.309370@r34g2000hsd.googlegroups.com>

On Aug 20, 7:31 am, "Mark Dufour" <mark.duf... at gmail.com> wrote:
> Hi all,
>
> I have just released Shed Skin 0.0.23. It doesn't contain the type
> inference scalability improvements I was working on, but it does have
> quite a few bug fixes and minor feature additions. Here's a list of
> changes:
>
> -support for __iadd__, __imul__ and such (except __ipow__ and __imod__)
> -some overdue set optimizations
> -fix for string formatting problem (%% did not always work)
> -extension module stability fixes
> -fix for particular inheritance problem
> -other minor bugfixes, cleanups, and error messages
>
> I could really use some systematic help in pushing Shedskin further. Some ideas:
>
> -send in bug reports - these are extremely valuable and motivating to
> me, yet I don't receive many..
> -find out why test 148 is currently broken under windows
> -add datetime, re or socket support
> -look into supporting custom classes in generated extension modules
> -write a Shedskin tutorial for 'novice' programmers
> -systemically test performance and suggest and work on improvements
> -investigate replacements for std::string and __gnu_cxx::hash_set
> -perform janitorial-type work in ss.py and lib/builtin.?pp
> -support extension modules under OSX (OSX gives me accute mental RSI)
> -add more tests to unit.py
>
> Thanks,
> Mark Dufour.
> --
> "One of my most productive days was throwing away 1000 lines of code"
> - Ken Thompson


Adding socket support would certainly open the door for many common
classes applications.  If I had my pick, I say, sockets and then re.

BTW, I gatta say projects like shedskin and pypy are the most exciting
python projects I'm aware of.  Please keep of the good work.  I'm so
excited about the day I can begin using shedskin for the types of
projects I use python on.

Greg


Greg



From oliver at obeattie.com  Sat Aug  4 15:07:07 2007
From: oliver at obeattie.com (oliver at obeattie.com)
Date: Sat, 04 Aug 2007 12:07:07 -0700
Subject: Encoding DeprecationWarning
Message-ID: <1186254427.792114.173170@q75g2000hsh.googlegroups.com>

Hey There,

Sorry if I am missing something here, but I get a DeprecationWarning
when importing a list which has some unicode characters in it (it's a
list of countries -- it's being raised on ?land), and I am left
wondering why. I am using the syntax u' to denote a unicode string.

If anyone would be so kind; what am I doing wrong?

Many Thanks,
Oliver



From ricaraoz at gmail.com  Tue Aug  7 08:15:38 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Tue, 07 Aug 2007 09:15:38 -0300
Subject: Something in the function tutorial confused me.
In-Reply-To: <1186424693.529497.217040@w3g2000hsg.googlegroups.com>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
Message-ID: <46B8626A.2070303@bigfoot.com>

Lee Fleming wrote:
> Thanks for all the help, everyone. I guess I was confused with default
> arguments that were mutable and immutable. I will continue to look
> over these posts until I understand what is happening.
> 
> I cannot believe the number of helpful responses I got!
> 

Apparently he didn't understand.
Neither did I.

Either (i)y's initial value (None or []) is saved somewhere to be
retrieved every time the function is called without 2nd argument, or
(ii) y keeps the value it has when last exiting the function (if there
is a third option, please mention it).

(i) (a) whenever the function is called without 2nd argument the value
None is retrieved and assigned to y, thus causing [] to be assigned to y
by the 'if' statement.
(i) (b) But then if it is "def f(x, y = [])" the list [] should be ALSO
saved somewhere and when the function is called without 2nd argument it
should be retrieved and assigned to y, thus y would always be [] when
you enter the function without 2nd arg.

(ii) (b) if y keeps the value it has when last exiting the function that
would explain that the second time you call it the list returned will
have two members.
(ii) (a) But then if it is "def f(x, Y = None)" when the "if" is
evaluated the empty list is assigned to y. So y will NO LONGER be None.
The second time the function is called y is NOT None (remember it keeps
it's last value) and the function returns a list with two members.

So, as I see it, the behavior is not coherent, the function treats y
differently according to the value it has assigned.

Please correct me!






From steve at holdenweb.com  Tue Aug  7 12:00:42 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Aug 2007 12:00:42 -0400
Subject: distutils
In-Reply-To: <1186497517.224280.126070@22g2000hsm.googlegroups.com>
References: <1186489676.042901.236140@w3g2000hsg.googlegroups.com>	<mailman.1710.1186491267.22759.python-list@python.org>
	<1186497517.224280.126070@22g2000hsm.googlegroups.com>
Message-ID: <f9a4v9$2v5$1@sea.gmane.org>

vedrandekovic at v-programs.com wrote:
> On 7 kol, 14:53, Steve Holden <st... at holdenweb.com> wrote:
>> vedrandeko... at v-programs.com wrote:
>>> Hello again,
>>> Is there any patch for python "distutils", for this
>>>>>> from distutils import log,dir_util
>>> ImportError: cannot import name log
>> What version of Python are you running with? It looks as though there
>> may be something wrong with your installation if it's recent:
>>
>> sholden at bigboy ~/Projects/Python
>> $ python
>> Python 2.5.1 (r251:54863, May 18 2007, 16:56:43)
>> [GCC 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)] on cygwin
>> Type "help", "copyright", "credits" or "license" for more information.
>>  >>> from distutils import log
>>  >>> import distutils.log
>>  >>>
>>
> Hello,
> 
> My version of python is 2.4 and I'am running it with Windows XP
> 
Your installation must be corrupted, then:

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Steve>\python24\python
Python 2.4.4 (#71, Oct 18 2006, 08:34:43) [MSC v.1310 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> from distutils import log
 >>>


regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bbxx789_05ss at yahoo.com  Tue Aug  7 02:06:57 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 06 Aug 2007 23:06:57 -0700
Subject: read(size=-1)
Message-ID: <1186466817.747723.87910@19g2000hsx.googlegroups.com>

Suppose I write:

f = open("myimg.jpg")
f.read(10)


According to the docs,
-----------
read([size])

Read at most size bytes from the file....The bytes are returned as a
string object.
----------

How does python convert a byte to a string?



From brett at python.org  Thu Aug 23 14:25:24 2007
From: brett at python.org (Brett Cannon)
Date: Thu, 23 Aug 2007 11:25:24 -0700
Subject: Issue tracker migration is complete
Message-ID: <bbaeab100708231125y2aaa416etb3905ba9fb3bf813@mail.gmail.com>

Thanks to the work of Erik Forsberg and Martin von L?wis, Python's
issue tracker now lives at http://bugs.python.org .

Because this is a new tracker on a new system you cannot use your
SourceForge password on the new tracker.  But account names have been
migrated, so if you go to "Lost your login?" and follow the
instructions for SF accounts you can continue to use the same account
name on the new tracker (you can also change it once you get a new
password).

And if you come across any bugs in the tracker, please report them
using the "Report Tracker Problem" link.

There are a bunch of people to thank for making this all happen.
Beyond the huge thanks to Erik (http://efod.se/) and Martin, other
people heavily involved include Paul DuBois for coming forward as
another tracker admin, the guys at Upfront Systems
(http://www.upfrontsystems.co.za/) providing the hosting, Skip
Montanaro for working on an anti-spam system, Stefan Seefeld for
helping with the test tracker back when this whole process started,
the Python Software Foundation's Infrastructure committee for helping
choose a tracker, and all the people who participated on the
tracker-discuss mailing list.  And if I forgot someone, thanks to them
as well.  =)

-Brett Cannon
Chairman, PSF Infrastructure committee

From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug 29 09:02:00 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 29 Aug 2007 15:02:00 +0200
Subject: handling tabular data in python--newbie question
In-Reply-To: <6cf42$46d56771$839b8704$5034@news1.tudelft.nl>
References: <6cf42$46d56771$839b8704$5034@news1.tudelft.nl>
Message-ID: <46d56e43$0$405$426a74cc@news.free.fr>

hyena a ?crit :
> Hi,
>   Just jump in python few days. I am wondering how to store and index a 
> table in python effectively and easily.I think the basic data types are not 
> very straight foward to handle a table (eg, from csv or data base.)

What make you think such a thing ?

>   I have a csv file, the first row of it is column names and the rest rows 
> are data. There are some tens of columns and hundreds rows in the file. I am 
> planning to use the column names as variables to access data, currently I am 
> thinking of using a dictionary to store this file but did not figure out a 
> elegant way to start.

Use the csv module - it's in the standard lib. It has an option to use 
dicts to allow keyed access to 'columns' (look for csv.DictReader).

Anyway, if you have anything complex to do with your data, you'd 
probably better use SQLite (possibly using csv module to help importing 
your data).

My 2 cents...


From bignose+hates-spam at benfinney.id.au  Thu Aug 30 19:28:14 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 31 Aug 2007 09:28:14 +1000
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au>
	<1188492060.983148.90000@r34g2000hsd.googlegroups.com>
Message-ID: <87fy20d2lt.fsf@benfinney.id.au>

zzbbaadd at aol.com writes:

> On Aug 30, 12:09 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
> > It's letting you know that the item isn't in the list. There's no
> > sensible return value from an "index" function in that condition.
> 
> for str:
> find(  	sub[, start[, end]])
> [...]
> Return -1 if sub is not found.
> 
> -1 is used in other languages as well.

It is no more sensible there than in the 'str.find' method, which is a
historical wart.

-- 
 \     "Hey Homer! You're late for English!"  "Pff! English, who needs |
  `\       that? I'm never going to England!"  -- Barney & Homer, _The |
_o__)                                                        Simpsons_ |
Ben Finney


From grante at visi.com  Wed Aug 22 10:08:35 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 22 Aug 2007 14:08:35 -0000
Subject: Chaining programs with pipe
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
	<13cnbi87neru8c3@corp.supernews.com>
	<mailman.97.1187757319.32294.python-list@python.org>
Message-ID: <13cogr3n6no937b@corp.supernews.com>

On 2007-08-22, Steve Holden <steve at holdenweb.com> wrote:
> Grant Edwards wrote:
>> On 2007-08-21, avishay <avishorp at yahoo.com> wrote:
>> 
>>> I'm trying to chain two programs with a pipe (the output of
>>> one feeding the input of the other). I managed to capture the
>>> output and feeding the input of each program independently
>>> with popen, but how do I tie them together?
>> 
>> On Unix, you do the same thing you would in C. Create a pipe
>> using os.pipe(), then run one program with stdout connected to
>> the "write" end of the pipe and the other program with stdin
>> connected to the "read" end of the pipe.
>> 
>> Or you can take a bit of a shortcut by letting the subprocess
>> module create the pipe for you:
>> 
>> http://docs.python.org/lib/node536.html
>> 
>>> Is there a solution that works equally on all platforms?
>> 
>> The doc page for subprocess doesn't say what platforms support
>> it.  I've had a lot of problems trying to use the subprocess
>> module on windows.  As is typical for Windows, there are all
>> sorts of special cases that either don't work at all or don't
>> work the way they should. You pays your money and you takes
>> your chances.
>> 
> Grant:
>
> I will shortly have to write some training material on using
> subprocess under Windows, so if you have any pointers to where
> your accumulated knowledge can be gleaned I would be grateful
> for the time saving.

There were two main problems I ran into:

 1) When you try to execute a program with with a pathname like
    \\host\path\to\prog.exe instead of R:\path\to\prog.exe,
    cmd.exe chokes and says it can't execute the file.  If you
    use a UNC path (the "\\" version) you have to use
    subprocess's shell=False option.  [I did find references to
    a patched version of cmd.exe on a few web pages, but didn't
    persue that option.]  os.system() has the same issue with
    UNC path names.

 2) In a wxPython app (possibly in non-console apps in
    general?), the child process's stdout and/or stderr didn't
    default to usable values. When the child tried to write to
    them you'd get crashes with rather cryptic error messages.
    Explicitly setting the child's stderr and stdout fixes
    that.  I don't remember os.system() having this problem,
    since it only cropped up after I switched to subprocess to
    try to solve 1).

In hindsight, these don't seem like big problems, but I tripped
over them at the same time and it took me _days_ to figure out
what was wrong.  I'm sure most Win32 programmers already knew
about those problems, but I'm a Unix guy who occasionally tries
to ship a Windows version of a Python app: the concept of a
process defaulting to having a stderr or stdout that wasn't
writable was utterly foreign to me.
    
-- 
Grant Edwards                   grante             Yow! Mr and Mrs PED, can I
                                  at               borrow 26.7% of the RAYON
                               visi.com            TEXTILE production of the
                                                   INDONESIAN archipelago?


From bricksales at yahpp.com  Tue Aug 28 19:32:55 2007
From: bricksales at yahpp.com (Thick as a Brick)
Date: Tue, 28 Aug 2007 18:32:55 -0500
Subject: Let's Unite Against  Pinheaded  midgets !
In-Reply-To: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
References: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
Message-ID: <1188343811_10573@sp12lax.superfeed.net>

Nenad Milicevic - The Aryan Serb wrote:

> 
> Serbian Committee for Aryan Defence
> 


Aren't the Serbian population the
white trailer trash of every nationality in Europe ?

You are going have to do some pretty deep house
cleaning to even find a white spot.

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


From jmcmonagle at velseis.com.au  Thu Aug  2 22:38:09 2007
From: jmcmonagle at velseis.com.au (John McMonagle)
Date: Fri, 03 Aug 2007 12:38:09 +1000
Subject: Error with Tkinter and tkMessageBox
In-Reply-To: <46b19fe4$0$17952$4fafbaef@reader1.news.tin.it>
References: <46af71b7$0$10619$4fafbaef@reader2.news.tin.it>	<mailman.1481.1186027758.22759.python-list@python.org>	<46b19caa$0$17951$4fafbaef@reader1.news.tin.it>
	<46b19fe4$0$17952$4fafbaef@reader1.news.tin.it>
Message-ID: <46B29511.3010801@velseis.com.au>

Fabio Z Tessitore wrote:
> I've tried to use Twm and SURPRISE! it works!!!
> 
> Can you say why? How can I fix the prob with Gnome?
> 
> Thanks

I don't know why it doesn't work correctly on the version of gnome which 
you are running (I run KDE).  Perhaps the question needs to be posed to 
a gnome group ?



From ldo at geek-central.gen.new_zealand  Fri Aug 31 01:20:03 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 31 Aug 2007 17:20:03 +1200
Subject: SAXParseException: not well-formed (invalid token)
References: <fb6alc$pfj$1@news.cesga.es> <46D6B9F6.2010402@web.de>
	<46D6C40F.4060105@cesga.es>
	<mailman.137.1188481649.28954.python-list@python.org>
Message-ID: <fb889e$ev8$1@lust.ihug.co.nz>

In message <mailman.137.1188481649.28954.python-list at python.org>, Carsten
Haese wrote:

> If your input string contains the byte 0xe9 where your accented e is,
> the file is actually latin-1 encoded. If it contains the byte sequence
> 0xc3,0xa9 it is UTF-8 encoded.

It is dismaying how often I come across Web pages that claim to be
UTF-8-encoded, but are actually Latin-1 or Dimdows-1252.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Aug 14 04:58:53 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 14 Aug 2007 10:58:53 +0200
Subject: Module imports during object instantiation
In-Reply-To: <mailman.1931.1187030415.22759.python-list@python.org>
References: <4c3vo4-u7k.ln1@learner.hq.netapp.com> <f9pcuj$6n4$1@sea.gmane.org>
	<mailman.1931.1187030415.22759.python-list@python.org>
Message-ID: <46c16ec9$0$405$426a34cc@news.free.fr>

Ritesh Raj Sarraf a ?crit :
> Steve Holden wrote:

(snip)

>> What's leading you to conclude the import isn't being executed? You
>> realise, I trust, that the module's code will only be executed on the
>> first call to __init__()?
>>
> 
> Well. Putting it in a "try" inside __init__() doesn't do anything.

This would be highly suprising.

> The
> import never happens.

As soon as your running this code on a platform where os.name yields 
either 'nt' or 'dos', the import statement is executed. You can bet your 
ass on this. Now this import can fail for a lot of reasons (imported 
module not in sys.path, error in the imported module, etc), and since 
your catching *and dismissing* the ImportError, you don't know what 
*effectively* happens. It's like someone send you mails, you set your 
filter to trash mails from this person, and then complain this person 
never send you mails !-)

> And thus if I make a call in any of the methods, it
> fails with an error message. A NameError IIRC.

"IIRC" ? Inspecting the traceback may help, you know.

Anyway, there's a simple way to know what happens:

class Log:
     def __init__(self, verbose, lock = None):

         self.VERBOSE = bool(verbose)

         self.lock = bool(lock)
         if self.lock:
             self.dispLock = threading.Lock()
         else:
             self.dispLock = None

         if os.name == 'posix':
            self.platform = 'posix'
            self.color = get_colors()

         elif os.name in ['nt', 'dos']:
             self.platform = 'microsoft'

             try:
                 import SomeModule
             except ImportError, e:
                 # comment out next line before going to prod...
                 print >> sys.stderr, e
                 self.color = None
	    else:
                 self.color = SomeModule.get_colors_windows()

         else:
             self.platform = None
             self.color = None


This should print the exact ImportError message. Which may help. IMHO.


>> You are right in assuming that __init__() is called once per instance
>> created, and it's legitimate to make an import conditional in the way
>> you have because of the "execute code only once" behavior - if the
>> module is already in sys.modules then it won't be re-imported, the
>> existing one will be used.
>>
> 
> This is what even my understanding is. But am afraid to say that this
> understanding is not implemented in Python. 

Do you *really* believe that no one would have noticed if something as 
important as the import mechanism was broken ?

(snip)
> Now I have some questions.
> 
> Going with your point of try/except imports at the top level, I am having
> multiple imports at the top level for the multiple classes that I have in
> the module. Not everything from the top level imports is required for the
> class Log (Say, just one module is what is required).
> So when I do a `from module import Log`, do all the modules at the  top
> level get imported?

Yes.

> My understanding says Yes, and if that's true, that's
> bad IMO. 

No, that's the right thing to do. When a module is loaded, all the 
top-level code is executed. period. How else would the class  and def 
statements be executed ?

FWIW, modules are supposed to have high cohesion. If you put unrelated 
things in a same module, then it's *your* design that's bad.

> My ultimate goal is to make all my classes as independent as possible while
> keeping them as lightweight as possible. If all top level module import
> statements are getting executed during a `from module import class`, this
> is _not_ lightweight IMO.

Since a module is only imported once, this should not be such a concern. 
It's obviously much more "lightweight" than going thru the import each 
time you instanciate the class, just to find out that the module is 
already imported.

But anyway, if two classes should be "totally" independant from each 
other, then what on earth are they doing in the same module ?

> That's what led me to try imports in __init__() but unfortunately I haven't
> seen that working for me even once.

"not working" is not a very useful description of a problem. The import 
mechanism works and it works fine. Your problem is elsewhere, but you 
didn't provide enough information for us to help you.


From ptmcg at austin.rr.com  Wed Aug  1 09:08:07 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 01 Aug 2007 06:08:07 -0700
Subject: Extending Python by Adding Keywords & Data types
In-Reply-To: <1185913739.879602.212950@w3g2000hsg.googlegroups.com>
References: <1185913739.879602.212950@w3g2000hsg.googlegroups.com>
Message-ID: <1185973687.883520.227540@k79g2000hse.googlegroups.com>

On Jul 31, 3:28 pm, Maximus Decimus <vishak.1... at gmail.com> wrote:
>
> I am using python v2.5 and I am an amateur working on python. I am
> extending python for my research work and would like some help and
> guidance w.r.t this matter from you experienced python developers.
>
> II want to add some more KEYWORDS and DATATYPES into the python script
> apart from the existing ones.
>

Vishak -

Let me echo the sentiments of the other posters who replied to your
message.  It is *very* unusual for a new Python user to begin their
Pythonic journey by modifying the Python interpreter to add new
keywords and datatypes.  Python is designed to be a very flexible and
extensible language just as it is.

Since you are familiar with C, your question strikes those of us on
this group as one who would write "I'm just learning C and I would
like to modify the core library to add some new functions for my
research."  And all the readers on comp.lang.c scratch their heads,
thinking "Huh?  Why doesn't this guy just write the functions in his
own program, the way the language was designed for him to do in the
first place?"

Now maybe your research is in the field of language design, and has
something to do with the relative ease/difficulty of modifying
computer languages.  Then it would make sense for you to dive right in
to learning how to modify Python's compiler.

But if your research was in just about any other field (from finite
elements analysis to genetic programming to genetics to simulations to
process control to whatever), DON'T start by modifying Python - start
by LEARNING Python.

When a new datatype is required in a Python program, then the
programmer writes a class to implement this datatype.  The class
itself is written in Python, but it can be used just like any built-in
datatype.  For instance, here is a new datatype I just thought up - a
Box that can hold up to 'n' objects.

class Box(object):
    def __init__(self,n):
        self.capacity = n
        self.contents = []

    def add(self,other):
        if len(self.contents) < self.capacity:
            self.contents.append( other )
        else:
            raise ValueError("can't add any more to this Box")

    def __iadd__(self,other):
        self.add(other)
        return self

box = Box(3)

# add stuff to the box until it overflows
while(True):
    box += object()


Voila!  I created a new datatype, Box, and even added support for it
to understand how to use the '+=' operator so that adding objects to
the Box looks like an addition statement.  All without modifying
Python itself.  (Here's an exercise - extend this example so that the
Box has a limited capacity in the *weight* of the added objects, as
well as in the number of objects.)

This is the basic way that one extends Python with their own new
datatypes and methods.  New keywords are a little rarer, but really,
start by just adding methods, like the add method above.  Python users
around the world develop a wide range of applications and programs
using just these techniques, and never touch the Python compiler
itself.

And here is a case you'd like to avoid.  Let's say you start by
learning how to modify Python because you need a general-purpose
container for things.  You spend two weeks learning how to do this,
getting your code mostly debugged, and then you post to
comp.lang.python your proud achievement.  Immediately the replies come
back, "Congratulations, newbie, you just reinvented the built-in list
type."  Without LEARNING Python, you wont know what is already
provided in the language.

So, in general this is a helpful group, and it is possible that you DO
need to learn how to add datatypes and keywords to Python as your
first objective.  We're not trying to pry, but give us a bit more
detail.  Someone might even rough out for you what one of your new
datatypes might look like.  So pray, tell us what sort of specialized
datatypes and keywords do you think you need to add, and we'll try to
point you in one or more directions.

-- Paul



From hat at se-162.se.wtb.tue.nl  Wed Aug 15 10:11:09 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 15 Aug 2007 16:11:09 +0200
Subject: Using python for dynamic behavior from C++
References: <mailman.2011.1187185357.22759.python-list@python.org>
Message-ID: <slrnfc62bt.vuq.hat@se-162.se.wtb.tue.nl>

On 2007-08-15, Jorgen Bodde <jorgen.maillist at gmail.com> wrote:
> Hi all,
>
> I am looking into using Python to introduce dynamic behavior in my
> C++, e.g. something like a simulation where objects can interact with
> eachother. I know Python can be called from C++, but is it possible to
> call a binary compiled Python file / array from C++ ? The reason I ask
> is that if my objects call a script every tick to do something, I
> would not like to let the python interpreter recompile the same code
> over and over again.
>
> Any pointers to how I can do that?

It is called 'embedding the Python Interpreter' and is in the second part of
the 'Extending and Embedding the Python Interpreter' document at python dot org.

Albert


From mfglinux at gmail.com  Thu Aug 16 08:55:24 2007
From: mfglinux at gmail.com (mfglinux)
Date: Thu, 16 Aug 2007 05:55:24 -0700
Subject: "Variable variable name" or "variable lvalue"
In-Reply-To: <pan.2007.08.15.23.26.39.782477@datallegro.com>
References: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
	<pan.2007.08.15.23.26.39.782477@datallegro.com>
Message-ID: <1187268924.412543.127690@r34g2000hsd.googlegroups.com>

The solution with the dictionary worked perfectlly well, my script is
running and even produces data with sense!!!

Thank you very much indeed to all of you answering. Cheers!



From davidjl at gol.com  Sun Aug 19 23:12:38 2007
From: davidjl at gol.com (David J. Littleboy)
Date: Mon, 20 Aug 2007 12:12:38 +0900
Subject: Latest models of Gibson guitars
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<QsCdnfC5hI4ENFXbnZ2dnUVZ8v2vnZ2d@bt.com>
	<190820071924351381%rag@nospam.techline.com>
Message-ID: <6sGdnRD3kJUvm1TbnZ2dnUVZ_i2dnZ2d@giganews.com>


"Randall Ainsworth" <rag at nospam.techline.com> wrote:
> In article <QsCdnfC5hI4ENFXbnZ2dnUVZ8v2vnZ2d at bt.com>, Hermit
> <hermit at please.dont.bother.com> wrote:
>
>> How does the image quality compare with a DSLR?
>
> Depends on whether it's a Paul or a Strat.

My L5 beats out any dSLR any day.

David J. Littleboy
Tokyo, Japan




From claird at lairds.us  Thu Aug  9 09:37:41 2007
From: claird at lairds.us (Cameron Laird)
Date: Thu, 9 Aug 2007 13:37:41 +0000
Subject: Issues of state (was: Tkinter or wxpython?)
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<7x8x8mpn37.fsf@ruckus.brouhaha.com> <hblpo4-mgj.ln1@lairds.us>
	<7xfy2t8l5n.fsf@ruckus.brouhaha.com>
Message-ID: <5uhro4-st8.ln1@lairds.us>

In article <7xfy2t8l5n.fsf at ruckus.brouhaha.com>,
Paul Rubin  <http://phr.cx at NOSPAM.invalid> wrote:
>claird at lairds.us (Cameron Laird) writes:
>> Others have answered this at other levels.  In elementary terms,
>> there truly is a difference, Paul, and one that's widely reified:
>> a "desktop client-server" application typically listens through
>> one socket, which therefore constitutes an index of the connection
>> or client, while a Web application communicates through a sequence
>> of independent HTTP transactions.  The latter can manage state only
>> to the extent it passes session information around.
>
>Is this significant?  In the case of a single user http app running on
>the same computer as the browser, the server should only listen on
>127.0.0.1.  Every http hit then almost certainly comes from the same
>session.  If there's doubt, the app can always set a random cookie at
>the initial screen and check that the cookie never changes.
>
>If there's only a small amount of session state (say up to a few
>hundred bytes) you can put it entirely into browser cookies and send
>it on every single http hit.

I'm not sure what we're discussing.  Yes, I agree those are 
mechanisms by which Web applications manage state.  Apparently
we agree that, in a general Web application, state management,
or related persistence, requires *some* mechanism or assumption.


From max at alcyone.com  Sun Aug 12 05:26:59 2007
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 12 Aug 2007 02:26:59 -0700
Subject: Fatest standard way to sum bytes (and their squares)?
Message-ID: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>

For a file hashing system (finding similar files, rather than identical 
ones), I need to be able to efficiently and quickly sum the ordinals of 
the bytes of a file and their squares.  Because of the nature of the 
application, it's a requirement that I do it in Python, or only with 
standard library modules (if such facilities exist) that might assist.

So far the fastest way I've found is using the `sum` builtin and 
generators::

	ordinalSum = sum(ord(x) for x in data)
	ordinalSumSquared = sum(ord(x)**2 for x in data)

This is about twice as fast as an explicit loop, but since it's going to 
be processing massive amounts of data, the faster the better.  Are there 
any tricks I'm not thinking of, or perhaps helper functions in other 
modules that I'm not thinking of?

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Whoever named it necking was a poor judge of anatomy.
    -- Groucho Marx


From aleax at mac.com  Sat Aug 25 11:48:34 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 25 Aug 2007 08:48:34 -0700
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
Message-ID: <1i3e7ul.1ougauneewje9N%aleax@mac.com>

tooru honda <tooru_honda at fast-mail.org> wrote:

> At the end, I think it is worthwhile to implement my own shuffle and 
> random methods based on os.urandom.  Not only does the resulting code
> gets rid of the minuscule bias, but the program also runs much faster.
> 
> When using random.SystemRandom.shuffle, posix.open and posix.close from
> calling os.urandom account for almost half of the total execution time
> for my program.  By implementing my own random and getting a much larger
> chunk of random bytes from os.urandom each time, I am able to reduce the
> total execution time by half.

If I were in your shoes, I would optimize by subclassing
random.SystemRandom and overriding the random method to use os.urandom
with some large block size and then parcel it out, instead of the
_urandom(7) that it now uses.  E.g., something like:

class SystemBlockRandom(random.SystemRandom):

    def __init__(self):
        random.SystemRandom.__init__(self)
        def rand7():
            while True:
                randata = os.urandom(7*1024)
                for i in xrange(0, 7*1024, 7):
                    yield long(binascii.hexlify(randata[i:i+7]),16)
        self.rand7 = rand7().next

    def random(self):
        """Get the next random number in the range [0.0, 1.0)."""
        return (self.rand7() >> 3) * random.RECIP_BPF

(untested code).  No need to reimplement anything else, it seems to me.


Alex


From david at asdf.asdf  Thu Aug 23 05:45:47 2007
From: david at asdf.asdf (bambam)
Date: Thu, 23 Aug 2007 19:45:47 +1000
Subject: beginner, idiomatic python
Message-ID: <13cqlqbbpn0dmea@corp.supernews.com>

Would someone like to suggest a replacement for this? It works ok,
but it doesn't look like any of the other code:

tempList = ['1','2','3','4','5','6','7','8']
sampleList=[]
for port in tempList:
    pagefound = False
    for i in range(self.parent.GetPageCount()):
        page=self.parent.GetPage(i)
        if hasattr(page, "port"):
            if page.port == int(port):
                pagefound=True
        if not pagefound:
            sampleList.append(port)

Thanks!




From bj_666 at gmx.net  Fri Aug 10 09:19:00 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 Aug 2007 13:19:00 GMT
Subject: Does PyModule_GetDict return information about class method
	variables?
References: <1186713277.019869.265820@d30g2000prg.googlegroups.com>
	<5i2c8rF3kqc46U1@mid.uni-berlin.de>
	<1186750443.773641.88450@i13g2000prf.googlegroups.com>
Message-ID: <5i36u4F3kqc46U4@mid.uni-berlin.de>

On Fri, 10 Aug 2007 05:54:03 -0700, MD wrote:

> On Aug 10, 12:43 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> class A(object):
>>     def foo(self):
>>         bar = 42
>>
>> The local name `bar` only exists if `foo()` is called on an instance of `A`.
>
>    Thanks for your reply. I am calling my extension function from the
> class method itself. So at that point the variable does exist. I am
> puzzled why PyModule_GetDict is not able to access the variable even
> though it does exist at that point.

It does not exist in the module or the function object but on the stack. 
Let's go to C again:


void baz(void);

void foo(void)
{
    int bar = 42;
    baz();
}

How do you get from `baz()` the value of `foo()`\s local `bar`?  Other
than ugly non portable stack trickery!?

Why don't you just give the object as argument to your C function? 
Wanting to poke around in the callers name space is code smell.  Don't do
that.

Ciao,
	Marc 'BlackJack' Rintsch


From paddy3118 at googlemail.com  Fri Aug 31 05:19:18 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Fri, 31 Aug 2007 02:19:18 -0700
Subject: list index()
In-Reply-To: <0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<1188497498.3468.60.camel@dot.uniqsys.com>
	<mailman.188.1188546300.28954.python-list@python.org>
	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
Message-ID: <1188551958.728836.137370@x35g2000prf.googlegroups.com>

On Aug 31, 8:47 am, Erik Max Francis <m... at alcyone.com> wrote:
> Hendrik van Rooyen wrote:
> > weird this - maybe a native English speaker can comment -
> > when I pronounce what fishermen do - it rhymes with roll,
> > but when I am talking about the thing that lives under bridges
> > and munches goats, the "O" sound is shorter, and more
> > towards the back of my mouth.
>
> Native English accents vary as well, but _roll_ rhymes with _troll_, not
> _trawl_.  _Trawl_ would rhyme with _fall_, and _fall_ definitely doesn't
> rhyme with _roll_.
>
> --
> Erik Max Francis && m... at alcyone.com &&http://www.alcyone.com/max/
>   San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
>    I do not like work even when someone else does it.
>     -- Mark Twain

I say the 'oll' in troll like the 'ol' in frolic, and pronounce roll
and role similarly.

My accent is probably from the East Midlands of the UK, but is not
pronounced.

- Paddy.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Aug 19 08:30:22 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 19 Aug 2007 14:30:22 +0200
Subject: Hot subject: a good python editor and/or IDE?
References: <mailman.2162.1187525764.22759.python-list@python.org>
Message-ID: <5iqreuF3qanv6U1@mid.individual.net>

S?bastien wrote:
> I am currently using Eclipse+PyDev when developping Python
> projects but I lack a fast, simple editor for tiny bit of scripts.
> So here is my question: what is, for you, the current best ( but
> still kind of light! ) Python editor/IDE ?

vim

BTW, this is an FAQ. Please look through the archives for many
threads with many, many IDEs.

Regards,


Bj?rn

-- 
BOFH excuse #140:

LBNC (luser brain not connected)



From dejanews at email.com  Fri Aug 17 22:32:02 2007
From: dejanews at email.com (samwyse)
Date: Sat, 18 Aug 2007 02:32:02 GMT
Subject: clarification
In-Reply-To: <13cb7frnqs8f6d9@corp.supernews.com>
References: <aa405c1f0708162332t7b6dbdd6o2cc0f512dc821d7b@mail.gmail.com>
	<mailman.2107.1187350363.22759.python-list@python.org>
	<fa41k8$10n$1@news2.u-psud.fr> <13cb7frnqs8f6d9@corp.supernews.com>
Message-ID: <CSsxi.28081$RX.11328@newssvr11.news.prodigy.net>

Scott David Daniels wrote:
>   lefts = set()
>   rights = set()
>   with open('sheet1', 'r') as fh:
>       for line in fh:
>           trimmed = line.strip()
>           if trimmed: # Skip blanks (file end often looks like that)
>               left, right = line.strip().split('\t')
>               lefts.add(left)
>               rights.add(right)
>   result = lefts & rights
> 
> -Scott

   # change to however many columns may later exist
   cols = [ set() for i in range(0, 2) ]
   with open('sheet1', 'r') as fh:
       for line in fh:
           for col, data in zip(cols, line.strip().split('\t')):
               col.add(data)
   result = cols[0] & cols[1]


From __peter__ at web.de  Thu Aug 23 07:34:38 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 23 Aug 2007 13:34:38 +0200
Subject: sentance containg the string or symbol ?
References: <1187868007.012689.224290@z24g2000prh.googlegroups.com>
Message-ID: <fajrcf$euu$03$1@news.t-online.com>

yadin wrote:

> how can i print a sentance containg the string or symbol ? in python
> and also lambda?

The most robust way is to use unicode strings:

>>> print u"? and also \N{GREEK CAPITAL LETTER LAMDA}"
? and also ?

If you use literals like the omega above you also have to specify the
encoding of your script in the first or second line, typically

# -*- coding: utf-8 -*-

Only 8-bit encodings are allowed.

Peter


From paul at boddie.org.uk  Mon Aug 13 14:03:01 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Mon, 13 Aug 2007 11:03:01 -0700
Subject: Adventure-Engines in Python
In-Reply-To: <mailman.1922.1187018525.22759.python-list@python.org>
References: <46C0255A.4080707@freakmail.de>
	<mailman.1922.1187018525.22759.python-list@python.org>
Message-ID: <1187028181.091616.177070@d55g2000hsg.googlegroups.com>

Wildemar Wildenburger wrote:
>
> OK, thanks. I should, of course, have been more specific. By saying
> "adventure" I mean the graphical variant (say, Monkey Island or Broken
> Sword), preferably but not necessarily in 2D.

Perhaps you could get a start from this game:

http://www.pygame.org/projects/23/300/

> I've also found vidaG, but it seems dead as well. I'll keep looking but
> if you know something, please let me know.

I imagine you can pester the developer here:

http://dodgyville.livejournal.com/

Paul



From ca.allen at gmail.com  Fri Aug  3 14:47:53 2007
From: ca.allen at gmail.com (Chris Allen)
Date: Fri, 03 Aug 2007 11:47:53 -0700
Subject: Global package variable, is it possible?
In-Reply-To: <46b36b31$0$10622$4fafbaef@reader2.news.tin.it>
References: <1186160415.065108.139160@e9g2000prf.googlegroups.com>
	<46b36b31$0$10622$4fafbaef@reader2.news.tin.it>
Message-ID: <1186166873.485756.290100@i13g2000prf.googlegroups.com>

On Aug 3, 10:51 am, Fabio Z Tessitore <fabioztessit... at libero.it>
wrote:
> Heve you tried to do something like:
>
> # module configure.py
> value1 = 10
> value2 = 20
> ...
>
> # other module
> from configure import *
>
> # now I'm able to use value1 value2 etc.
> var = value1 * value2
>
> bye


Thanks for the response Fabio.  I thought about this, but I don't
think this will work well in my situation either.  Take a look at the
following:

__init__py:
#######################
_default_cfgfile = 'config.conf'
from configure import *
cfg = loadcfg(_default_cfgfile)

import pkg_module1
import pkg_module2
# EOF


configure.py:
########################
from ConfigParser import SafeConfigParser

def loadcfg(filename):
    file = open(filename)
    cfg = SafeConfigParser()
    cfg.readfp(file)
    return cfg
# EOF

pkg_module1:
########################
_default_cfgfile = 'config.conf'
from configure import *
cfg = loadcfg(_default_cfgfile)
# EOF


One problem I see with this approach is that we must define the
configuration file in every module.  Alternatively a better approach
would be to only define the configuration file within configure.py,
however this also seems less than ideal.  I don't like it because I
believe something as important as the location of the package
configuration file, used by all modules, should defined in __init__
not tucked away in one of it's modules.

Another problem is that after the package is loaded and we want to
load in a new config file, what will happen?  With this approach we'll
have to reload every module the package uses for them to read the new
config.  And even then, how do we tell each module what the new config
file is?  If I did define the configuration file in configure.py then
I suppose what I could do is set a cfgfile variable in configure.py to
the new file location and reload all the modules.  If there is no
global package variables, then maybe this isn't so bad...

Hmm. So maybe something like this makes sense:

__init__py:
#######################
_default_cfg_file = 'config.conf'

import configure
def loadcfg(filename):
    configure.cfgfile = filename
    try:
        reload(pkg_module1)
        reload(pkg_module2)
    except NameError:
        pass
cfg = loadcfg(_default_cfg_file)

import pkg_module1
import pkg_module2
# EOF

confgure.py:
#######################
cfgfile = None
def loadcfg()
    global cfgfile
    if not cfgfile:
        return None
    file = open(cfgfile)
    cfg = SafeConfigParser()
    cfg.readfp(file)
    return cfg
# EOF

pkg_module1:
#######################
import configure
cfg = configure.loadcfg()
# EOF

It's a little bit convoluted, but I think it solves most of my
gripes.  Anybody have a better idea of how to do this?  Thanks again
Fabio.



From mail at microcorp.co.za  Sat Aug 18 02:55:54 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 18 Aug 2007 08:55:54 +0200
Subject: best GUI library for vector drawing program
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
	<46c5c3b9$0$36443$4fafbaef@reader5.news.tin.it>
Message-ID: <014b01c7e169$bd20af40$03000080@hendrik>

 "pierbr....e.it" <pippo at pippopippo.pp> wrote:

> I used wxWidgets for a work like that. I found it quite easy to use and 
> I found simple to create a Gui with wxdev which is quite rad.
> bye
> Pier Paolo

There is also pycad, but apart from knowing that it exists, I know
nothing about it.

- Hendrik



From oliver at ootbc.com  Sat Aug 18 13:02:53 2007
From: oliver at ootbc.com (Oliver Nelson)
Date: Sat, 18 Aug 2007 17:02:53 GMT
Subject: Canceling events on COM Objects in python
In-Reply-To: <1187445274.964435.267010@q4g2000prc.googlegroups.com>
References: <8Yuxi.5292$924.612@newssvr23.news.prodigy.net>
	<1187445274.964435.267010@q4g2000prc.googlegroups.com>
Message-ID: <1DFxi.46799$Um6.17796@newssvr12.news.prodigy.net>

Mike,

Thank you for the suggestion.  I will ask over there also.  The event is 
sent back from the COM interface as the code illustrates. 
MakeActiveXClass allows me to pass the object that will receive events. 
  I don't understand much more detail about how it works.  It is 
certainly a different model than the standard wx event system...

OLIVER

kyosohma at gmail.com wrote:
> On Aug 17, 11:54 pm, Oliver Nelson <oli... at ootbc.com> wrote:
>> I have MapPoint working in Python, and I'm trying to cancel events on
>> the map, but I can't seem to make that happen.  I'm responding to the
>> events successfully in my panel object.  My code is like this:
>>
>> global MapPointMod
>> MapPointMod =
>> win32com.client.gencache.EnsureModule("{51C0A9CA-F7B7-4F5A-96F4-43927C6FA50F}",
>> 0, 1, 0)
>>
>> class MyPanel(wx.Panel):
>>      def __init__(self, *args, **kwds):
>>          # begin wxGlade: MyPanel.__init__
>>          kwds["style"] = wx.TAB_TRAVERSAL
>>          wx.Panel.__init__(self, *args, **kwds)
>>          self.frame = args[0]
>>
>>          MyMap = MakeActiveXClass(MapPointMod.MappointControl,
>> eventObj=self)
>>          self.window_1 = MyMap(self, -1)
>>          self.window_1.OpenMap("C:\\TEMP\\GPS_ON.ptt")
>> ...
>> ...
>>      def OnBeforeClick(self, Button, Shift, X, Y, Cancel):
>>          print "tada"
>>
>> My event fires just fine, but I can't seem to figure out how to cancel
>> the event so that mappoint doesn't do its stuff with it...I've tried
>> setting Cancel based on the mappoint specs, but it doesn't seem to get
>> sent back anywhere...
>>
>> Any ideas please?
>>
>> Thanx,
>>
>> OLIVER
> 
> This probably isn't the best place to post questions of this nature.
> You should try the wxPython's user group or the pywin32 group.
> 
> http://wxpython.org/maillist.php
> http://mail.python.org/mailman/listinfo/python-win32
> 
> Is the event you're trying to cancel caught by wxPython's event
> handlers or win32?
> 
> Mike
> 


From arnau at ehas.org  Thu Aug  9 13:01:05 2007
From: arnau at ehas.org (Arnau Sanchez)
Date: Thu, 09 Aug 2007 19:01:05 +0200
Subject: how to get command output using python
In-Reply-To: <b6bf7b050708090714vde102al5ea0c21bdae1a604@mail.gmail.com>
References: <b6bf7b050708090714vde102al5ea0c21bdae1a604@mail.gmail.com>
Message-ID: <46BB4851.6040605@ehas.org>

Steven Harms escribi?:

> In python it is quite easy:
> 
> import commands
> status, output = commands.getstatusoutput("my command")

Uhm, this module has a big issue:

(http://docs.python.org/lib/module-commands.html)
----
8.17 commands -- Utilities for running commands

Availability: Unix.
----

Any non cross-platform module should be avoided unless absolutely necessary.

Subprocess is the right module to use.

arnau



From S.Mientki-nospam at mailbox.kun.nl  Sun Aug  5 04:45:11 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sun, 05 Aug 2007 10:45:11 +0200
Subject: Pyscripter
In-Reply-To: <1186302328.706942.242920@q75g2000hsh.googlegroups.com>
References: <1186302328.706942.242920@q75g2000hsh.googlegroups.com>
Message-ID: <10a14$46b58c8d$d443bb3a$18267@news.speedlinq.nl>

RichSaneSwindler wrote:
> I think that pyscripter is the most promising Python IDE around
but for windows only !
  and I
> am exciting about its possibilities. However, I find a few issues with
> it annoying enough that I don't use it. They seem easily fixed in
> which case I think it would be superior to most IDEs. I am wondering
> if any users out there would like to add to/debate this list of
> benefits and issues (for reference I am using Pyscripter
> 

Neil,
PyScripter has it's own discussion list
   http://groups.google.com/group/PyScripter/topics?hl=en
and from my own experiences,
I know that Kiriakos (the designer) is very willing to listen to good ideas,
and if they are good he'll implement them in no time !

cheers,
Stef


From arnau at ehas.org  Thu Aug  9 16:37:06 2007
From: arnau at ehas.org (Arnau Sanchez)
Date: Thu, 09 Aug 2007 22:37:06 +0200
Subject: how to get command output using python
In-Reply-To: <1186681910.789048.132140@z24g2000prh.googlegroups.com>
References: <b6bf7b050708090714vde102al5ea0c21bdae1a604@mail.gmail.com>	<mailman.1803.1186679013.22759.python-list@python.org>
	<1186681910.789048.132140@z24g2000prh.googlegroups.com>
Message-ID: <46BB7AF2.3010607@ehas.org>

kyosohma at gmail.com escribi?:

>> Any non cross-platform module should be avoided unless absolutely necessary.
>>
>> Subprocess is the right module to use.
>>
>> arnau
> 
> You forgot to mention that subprocess replaces commands, so in effect,
> commands is deprecated anyway.

It was implicit :-)

Anyway, these modules ("commands", "popen2", ...) are not officially deprecated 
(at least in 2.5), so it's not strange that newcomers sometimes choose (wrongly) 
them.



From rupole at hotmail.com  Thu Aug 16 20:21:45 2007
From: rupole at hotmail.com (Roger Upole)
Date: Thu, 16 Aug 2007 20:21:45 -0400
Subject: Cancelling events on a COM Object
References: <bF3xi.1834$4w7.1163@newssvr22.news.prodigy.net>
Message-ID: <1187309979_991@sp12lax.superfeed.net>


Oliver Nelson wrote:

>I have MapPoint working in Python, and I'm trying to cancel events on the map, but I can't seem to make that happen.  I'm
>responding to the events successfully in my panel object.  My code is like this:
>
> global MapPointMod
> MapPointMod = win32com.client.gencache.EnsureModule("{51C0A9CA-F7B7-4F5A-96F4-43927C6FA50F}", 0, 1, 0)
>
> class MyPanel(wx.Panel):
>     def __init__(self, *args, **kwds):
>         # begin wxGlade: MyPanel.__init__
>         kwds["style"] = wx.TAB_TRAVERSAL
>         wx.Panel.__init__(self, *args, **kwds)
>         self.frame = args[0]
>
>         MyMap = MakeActiveXClass(MapPointMod.MappointControl, eventObj=self)
>         self.window_1 = MyMap(self, -1)
>         self.window_1.OpenMap("C:\\TEMP\\GPS_ON.ptt")
> ...
> ...
>     def OnBeforeClick(self, Button, Shift, X, Y, Cancel):
>         print "tada"
>
>
> My event fires just fine, but I can't seem to figure out how to cancel the event so that mappoint doesn't do its stuff with
> it...I've tried setting Cancel based on the mappoint specs, but it doesn't seem to get sent back anywhere...
>
> Any ideas please?
>
> Thanx,
>
> OLIVER

Instead of assigning to the variable name, output parameters need to be
returned from the method

             Roger






From korovev76 at gmail.com  Tue Aug  7 02:55:10 2007
From: korovev76 at gmail.com (korovev76 at gmail.com)
Date: Mon, 06 Aug 2007 23:55:10 -0700
Subject: parsing a dbIII file
Message-ID: <1186469710.277542.246430@w3g2000hsg.googlegroups.com>

Hello everybody, I'm new to python (...I work with cobol...)

I have to parse a file (that is a dbIII file) whose stucture look like
this:
|string|, |string|, |string that may contain commas inside|, 1, 2, 3, |
other string|

Is there anything in python that parses this stuff?


thanks a lot
korovev



From aboudouvas at panafonet.gr  Sat Aug  4 19:05:30 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Sat, 04 Aug 2007 16:05:30 -0700
Subject: Eclipse/PyDev question.
In-Reply-To: <S3Osi.173945$wG2.172679@newsfe17.lga>
References: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>
	<S3Osi.173945$wG2.172679@newsfe17.lga>
Message-ID: <1186268730.360593.160410@22g2000hsm.googlegroups.com>

News" (or, news to me :) )

The creator of PyDev, contacted me and told me that latest version of
PyDev need not require the whole SDK but only the Runtime Platfom is
OK. That means that we download only the 40MB file (and not the 120
one) and this does not include all the Java stuff that we see in SDK.
So, combined with PyDev, we have an editor just for Python!

I test it a few hours now and it is really fast!



From laurent.pointal at limsi.fr  Thu Aug 16 02:47:58 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Thu, 16 Aug 2007 08:47:58 +0200
Subject: Python Book Recommendations
In-Reply-To: <1187191803.845011.30400@x35g2000prf.googlegroups.com>
References: <d5506a9f0708141439v6a30d4c8l5092b30d269c1af4@mail.gmail.com>
	<Pine.LNX.4.44.0708141556370.5396-100000@violet.rahul.net>
	<1b31ae500708141638w77614014o6f382d0389bc69df@mail.gmail.com>
	<mailman.2015.1187189280.22759.python-list@python.org>
	<1187191803.845011.30400@x35g2000prf.googlegroups.com>
Message-ID: <fa0ruu$65r$1@news2.u-psud.fr>

Azazello a ?crit :
> On Aug 15, 7:47 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
>> If I could have only one book, I would buy "Core Python, Second
>> Edition," by Wesley Chun.
>>
>> For the record, I own:
>> Core Python, Second Edition (great)
>> wxPython in Action (haven't used yet)
>> Beginning Python (barely used)
>> Python in a Nutshell (use as a reference, although interactive python
>> dir() is more useful)
>> Dive into Python (great book)
>> Python Cookbook (great book)
>> Python Pocket Reference (not very useful)
>> Python Phrasebook (I love the Phrasebook series, but this isn't a
>> necessary book)
> 
> I would like to add:
> 
> Foundations of Python Network Programming

There was a review about this one on slashdot:
http://books.slashdot.org/books/04/10/13/1815209.shtml?amp;tid=192&amp;tid=6

> 
> I also use the Python Essential Reference.  (although all of the
> information is probably online it's nice to have a solid paper
> reference)
> 


From jstroud at mbi.ucla.edu  Fri Aug 24 13:58:28 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 24 Aug 2007 17:58:28 GMT
Subject: How to replace a method in an instance.
In-Reply-To: <mailman.266.1187974819.32294.python-list@python.org>
References: <mailman.258.1187971369.32294.python-list@python.org>	<1187971953.261328.219000@q3g2000prf.googlegroups.com>	<alpine.LFD.0.999.0708241223480.30194@saturn.syslang.net>
	<mailman.266.1187974819.32294.python-list@python.org>
Message-ID: <8%Ezi.34724$2v1.10476@newssvr14.news.prodigy.net>

Steven W. Orr wrote:
> Ok. I have a collection of classes that are produced by a factory.  They
> all inherit from a baseclass. One (maybe more) of the classes inherits a  
> method that he shouldn't. All I want is to be able to change that
> particular class so that he will have the special method that he needs    
> instead of the default one that he inherits. I was thinking that instead 
> of making a special class for CC to inherit from which would give him his 
> special replacement method(s), I could simply assign them in a manner 
> which would more easily lend itself to later being table driven.
> 
> If I had a choice, I'd rather not do it in init. Instead, I'd rather be 
> able to say something like 
> CC.m1 = repmeth
> but since in the real world, CC inherits from his baseclass, the above 
> assignment causes the baseclass to be altered. :-(
> 
> Please tell me if I need to provide more.


def f1(self):
   print 'f1'

def f2(self):
   print 'f2'

def classfactory(replacements=None):
   class _C(object):
     def doit(self):
       print 'doit'
     def doit2(self):
       print 'doit2'
   if replacements is not None:
     for fname, f in replacements.items():
       setattr(_C, fname, f)
   return _C

Aclass = classfactory()
Aclass().doit()

Aclass2 = classfactory({'doit':f1, 'doit2':f2})
Aclass().doit2()
Aclass2().doit2()



Here's the output:


py> def f1(self):
...   print 'f1'
...
py> def f2(self):
...   print 'f2'
...
py> def classfactory(replacements=None):
...   class _C(object):
...     def doit(self):
...       print 'doit'
...     def doit2(self):
...       print 'doit2'
...   if replacements is not None:
...     for fname, f in replacements.items():
...       setattr(_C, fname, f)
...   return _C
...
py> Aclass = classfactory()
py> Aclass().doit()
doit
py>
py> Aclass2 = classfactory({'doit':f1, 'doit2':f2})
py> Aclass().doit2()
doit2
py> Aclass2().doit2()
f2


James


From conra2004 at yahoo.com  Fri Aug 17 12:27:31 2007
From: conra2004 at yahoo.com (yadin)
Date: Fri, 17 Aug 2007 09:27:31 -0700
Subject: help to make program better
Message-ID: <1187368051.235289.76520@w3g2000hsg.googlegroups.com>

hi!
Can any one tell me why is it that i can't see my second frame and why
is the value of freq not Appended in the First frame ...thanks
I know it is wx python  but it has to do with passing variables.thanks

import wx

def create(parent):
    return Frame1(parent)

[wxID_FRAME1, wxID_FRAME1FREQ, wxID_FRAME1FREQDISP,
wxID_FRAME1STATICTEXT1,
] = [wx.NewId() for _init_ctrls in range(4)]

class Frame1(wx.Frame):
    def _init_ctrls(self, prnt):
        # generated method, don't edit
        wx.Frame.__init__(self, id=wxID_FRAME1, name='', parent=prnt,
              pos=wx.Point(380, 179), size=wx.Size(241, 133),
              style=wx.DEFAULT_FRAME_STYLE, title='Frame1')
        self.SetClientSize(wx.Size(233, 99))

        self.staticText1 = wx.StaticText(id=wxID_FRAME1STATICTEXT1,
              label='frequency disp', name='staticText1', parent=self,
              pos=wx.Point(24, 32), size=wx.Size(71, 13), style=0)

        self.freqdisp = wx.TextCtrl(id=wxID_FRAME1FREQDISP,
name='freqdisp',
              parent=self, pos=wx.Point(104, 24), size=wx.Size(100,
21),
              style=0, value='')

        self.freq = wx.Button(id=wxID_FRAME1FREQ, label='get freq',
name='freq',
              parent=self, pos=wx.Point(24, 56), size=wx.Size(184,
23),
              style=0)
        self.freq.Bind(wx.EVT_BUTTON, self.OnButton1Button,
id=wxID_FRAME1FREQ)

    def __init__(self, parent):
        self._init_ctrls(parent)

    def OnButton1Button(self, event):

        def create(parent):
            return Frame2(parent)
        [wxID_FRAME2, wxID_FRAME2FREQ, wxID_FRAME2FREQDISP,
wxID_FRAME2STATICTEXT1,] = [wx.NewId() for _init_ctrls in range(4)]

        class Frame2:
            def __init__(self):
                #
                wx.Frame.__init__(self, id=wxID_FRAME2, name='',
parent=prt,
                      pos=wx.Point(400, 179), size=wx.Size(300, 133),
                      style=wx.DEFAULT_FRAME_STYLE, title='Frame2')
                self.SetClientSize(wx.Size(233, 99))

                self.staticText1 =
wx.StaticText(id=wxID_FRAME2STATICTEXT1,
                      label='frequency goes here first',
name='staticText2', parent=self,
                      pos=wx.Point(24, 32), size=wx.Size(71, 13),
style=0)

                self.freqdisp2 = wx.TextCtrl(id=wxID_FRAME2FREQDISP,
name='freqdisp2',
                      parent=self, pos=wx.Point(104, 24),
size=wx.Size(100, 21),
                      style=0, value=' ')

                self.freq = wx.Button(id=wxID_FRAME2FREQ, label='get
freq', name='freq',
                      parent=self, pos=wx.Point(24, 56),
size=wx.Size(184, 23),
                      style=0)
                self.freq.Bind(wx.EVT_BUTTON, self.OnButton2Button,
id=wxID_FRAME2FREQ)

            def __init__(self, parent):
                self._init_ctrls(parent)
            def OnButton2Button(self, event):
                freqdisp.Append('this is it 24HZ!')
            Show()

if __name__ == '__main__':
    app = wx.PySimpleApp()
    frame = create(None)
    frame.Show()

    app.MainLoop()



From sjdevnull at yahoo.com  Sun Aug 26 14:49:12 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: Sun, 26 Aug 2007 11:49:12 -0700
Subject: lisper learning python,
	... could you please comment my first python program?
In-Reply-To: <1188150028.716338.64390@57g2000hsv.googlegroups.com>
References: <1188143768.742884.38520@r29g2000hsg.googlegroups.com>
	<1188150028.716338.64390@57g2000hsv.googlegroups.com>
Message-ID: <1188154152.874376.195090@22g2000hsm.googlegroups.com>

Michele Simionato wrote:
> On Aug 26, 5:56 pm, neptundan... at gmail.com wrote:
> > Hi,
> >   to extend my skills, I am learning python. I have written small
> > program which computes math expression like "1+2*sin(y^10)/cos(x*y)"
> > and similar, so far only + - * / ^ sin con tan sqrt are supported. But
> > my program is quite inextensible, I have to change the code to add new
> > functions... Could some fellow experienced pythonista give me some
> > tips how to make my program shorter, and more extensible?
>
> BTW, since you are familiar with Lisp, I would recommend you
> IPython for a better interactive experience.

IPython's got great support for saving and using old results and a lot
of other things.  It's borderline unreadable for stack traces out of
the box, though; putting "xtrace Plain" in your ipythonrc helps a
lot.  The color options (either turning it off or making it light/dark
background appropriate) are also quite important to having it at all
usable; depending on your default bg color that may not be an issue.
And if you want to have a view of your data that's similar to the rest
of the Python world (useful if you ever intend for others to look at
your output or you to look at theirs), "pprint 0" is nice too.

Sorry if that sounds like it's an indictment--it's a very nice shell
aside from a few output weirdnesses that are easily configured.



From andrew.arobert at gmail.com  Thu Aug 30 19:48:43 2007
From: andrew.arobert at gmail.com (andrew.arobert at gmail.com)
Date: Thu, 30 Aug 2007 23:48:43 -0000
Subject: Automation and scheduling of front page publishing using python
Message-ID: <1188517723.279932.299400@x40g2000prg.googlegroups.com>

Good afternoon,

We have numerous web sites which are currently being manually
published via Front Page.

Doing one or two sites on an ad-hoc basis was not too bad but we are
now over 20 or thirty at set times during a business day.

What I would love to do is find a way of automating this task, ideally
by the command line, and called from a central automated task
scheduler such as Maestro.

Using Cygwin's rsync or Microsoft's Robocopy successfully moves a
site from one file system path to another but the front page
extensions and navigation/etc are
broken.

Does anyone know of an alternative method for handling this using
Python?

I did a google search and a scan of the cheese shop but nothing seems
to jump out as a place to start.

Any advice you can give on this would be fantastic.

I've been trying to introduce Python to my shop for some time but they
have been most resistant, usually insisting on Perl.

Thanks,
Andy



From bignose+hates-spam at benfinney.id.au  Thu Aug  9 09:29:35 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 09 Aug 2007 23:29:35 +1000
Subject: Help with Dictionaries and Classes requested please.
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <87ejic6dkw.fsf@benfinney.id.au>

"special_dragonfly" <Dominic at PLEASEASK.co.uk> writes:

> I've managed to solve the problem, I really was just being a
> dunce.

Doubtful; but at this stage we can't tell, because we still don't know
what it is you're actually trying to *do*.

> Here's how incase anyone is wondering:
> 
> class MyClass:
>     def __init__(self):
>         name=""
> dict={}
> dict[0]=[]
> dict[0].append(MyClass())
> dict[0][0].name="Hello"
> print dict[0][0].name

It's not clear why you are using the value 0 for a dictionary key
here; nor why you're assigning an attribute to an object after
creating the object. Neither of them are errors, but without context
it's hard to know what advice to give.

-- 
 \          "When we call others dogmatic, what we really object to is |
  `\        their holding dogmas that are different from our own."  -- |
_o__)                                                   Charles Issawi |
Ben Finney


From redtiger84 at googlemail.com  Tue Aug  7 14:25:43 2007
From: redtiger84 at googlemail.com (Christoph Krammer)
Date: Tue, 07 Aug 2007 11:25:43 -0700
Subject: re.sub does not replace all occurences
In-Reply-To: <slrnfbhd37.268.horpner@FIAD06.norwich.edu>
References: <1186507704.440408.20630@57g2000hsv.googlegroups.com>
	<slrnfbhd37.268.horpner@FIAD06.norwich.edu>
Message-ID: <1186511143.394471.236020@b79g2000hse.googlegroups.com>

Neil Cerutti schrieb:
> In other words, the fourth argument to sub is count, not a set of
> re flags.

I knew it had to be something very stupid.

Thanks a lot.



From DustanGroups at gmail.com  Sun Aug 12 20:35:21 2007
From: DustanGroups at gmail.com (Dustan)
Date: Mon, 13 Aug 2007 00:35:21 -0000
Subject: A dumb question about a class
In-Reply-To: <TqSdnWYzVdWvGCLbnZ2dnUVZ_saknZ2d@comcast.com>
References: <mailman.1887.1186955369.22759.python-list@python.org>
	<TqSdnWYzVdWvGCLbnZ2dnUVZ_saknZ2d@comcast.com>
Message-ID: <1186965321.741540.108820@k79g2000hse.googlegroups.com>

On Aug 12, 5:09 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
>      def iter_primes():
>          # an iterator of all numbers between 2 and +infinity
>          numbers = itertools.count(2)
>
>          # generate primes forever
>          while True:
>
>              # get the first number from the iterator (always a prime)
>              prime = numbers.next()
>              yield prime
>
>              # remove all numbers from the (infinite) iterator that are
>              # divisible by the prime we just generated
>              numbers = itertools.ifilter(prime.__rmod__, numbers)

This is kind of OT (from the thread), but in this iter_primes
function, numbers is becoming an ifilter of an ifilter of an ifilter
of an ifilter of an ifilter of an ifilter of... Is that really at all
efficient for larger numbers (millions or billions, or even bigger)?



From sbellon at sbellon.de  Thu Aug  2 15:29:49 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Thu, 2 Aug 2007 21:29:49 +0200
Subject: Catching SystemExit in C API code when embedding Python?
References: <20070802141906.2581c099@cube.tz.axivion.com>
	<m%psi.3186$Mu5.909@newsfe15.phx>
Message-ID: <20070802212949.222081eb@cube.tz.axivion.com>

On Thu, 02 Aug, Farshid Lashkari wrote:

> Also, here is some sample code that will catch system exit exceptions:
> 
> //Call python code
> ...
> //Check for system exit exception
> if(PyErr_Occurred()) {
>      if(PyErr_ExceptionMatches(PyExc_SystemExit)) {
>          //handle system exit
>          PyErr_Clear();
>      } else {
>          PyErr_Print();
>      }
> }

Thanks for your hints ...

The interesting part is "Call python code". In my example this is done
with PyRun_SimpleString which does not return if an exception is not
handled but raised "out of" the interpreter. So I am unsure of what you
mean with "Call python code".

When installing an excepthook (see my other posting), then I can indeed
catch all exceptions ... except for SystemExit which is the one I'm
after.

-- 
Stefan Bellon


From labrach at gmail.com  Thu Aug 30 07:19:03 2007
From: labrach at gmail.com (labrach at gmail.com)
Date: Thu, 30 Aug 2007 04:19:03 -0700
Subject: python + gcov
In-Reply-To: <1188404571.590476.265840@r34g2000hsd.googlegroups.com>
References: <1188404571.590476.265840@r34g2000hsd.googlegroups.com>
Message-ID: <1188472743.570376.120390@o80g2000hse.googlegroups.com>

Some precisions :
I've forced the configuration options with the followings flags in the
Makefile.pre :
  OPT='-Wall -fprofile-arcs -ftest-coverage -pg'
  BASECFLAGS='-Wall -fprofile-arcs -ftest-coverage -pg'
  LDFLAGS='-Wall -fprofile-arcs -ftest-coverage -pg'
  XLINKER='-Wall -fprofile-arcs -ftest-coverage -pg'

But, the coverage files are not produced by a simple : python -c
'print "Hello"'
while the gmon.out is produced

Another questions is:
the wrapped c++ module is also compile with -pg flags (and -fprofile-
arcs -ftest-coverage  as well) but the profile information does not
appear in the gmon.out
Do I need to make a static extension of my imported module to profile
it ?

thanks anyone ...

laurent


On 29 ao?t, 18:22, labr... at gmail.com wrote:
> Hi
> I want to profile (and analyse coverage) some  c++ code imported as apythonmodule
> I've compiledpython(2.4.2) with gcc 3.4.3 and flags=-Wall -fprofile-
> arcs -ftest-coverage in order to usegcov. However, thepythonbinary
> does not generate any coverage file (such than *.gcno, gcda) during
> execution.
> any tips ?
> or may be another method to profile c++ wrapped modules withinpython?
>
> thanks
>
> laurent




From larry.bates at websafe.com  Mon Aug  6 15:02:21 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 06 Aug 2007 14:02:21 -0500
Subject: amra and py2exe
In-Reply-To: <1186175685.531985.207190@e9g2000prf.googlegroups.com>
References: <1186175685.531985.207190@e9g2000prf.googlegroups.com>
Message-ID: <46B7703D.3020104@websafe.com>

vinod wrote:
> Hi i am having trouble creating exe using py2exe for amara package
> i saw some posts related to this talking about amara cat file but i
> dont have any cat file for amara on my machine.
> the standalone script runs fine. i am using python on windows
> here is the error i am getting while creating the exe
> The following modules appear to be missing
> ['amara', 'ext.IsDOMString', 'ext.SplitQName']
> 
> can anybody please help me with this?
> 
> Thanks,
> Vinod
> 
You should post this on gmane.comp.python.py2exe newsgroup.

-Larry


From kyosohma at gmail.com  Sat Aug  4 11:59:53 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Sat, 04 Aug 2007 08:59:53 -0700
Subject: the one python book
In-Reply-To: <mailman.1611.1186233912.22759.python-list@python.org>
References: <mailman.1611.1186233912.22759.python-list@python.org>
Message-ID: <1186243193.751427.39490@q3g2000prf.googlegroups.com>

On Aug 4, 8:23 am, "dhr" <dima.hris... at gmail.com> wrote:
> newbie question:
>
> Is there a 'K&R" type of Python book? The book that you'd better have on
> your shelf if you are going into Python?

I would recommend "Programming Python 3rd Ed." by Lutz or "Core Python
Programming" by Chun. Lutz has more examples than Chun, but Chun has
lots of good information about the language's history. Both authors
share interesting facts about the language, some of which are pretty
obscure. Lutz has good case studies though, so it may be slightly more
valuable.

Mike



From steven.bethard at gmail.com  Fri Aug 10 13:09:59 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 10 Aug 2007 11:09:59 -0600
Subject: is there anybody using __del__ correctly??
In-Reply-To: <1186762908.121319.35900@x35g2000prf.googlegroups.com>
References: <1186731369.073644.158490@z24g2000prh.googlegroups.com>
	<1186762908.121319.35900@x35g2000prf.googlegroups.com>
Message-ID: <SradnX_-hI91BiHbnZ2dnUVZ_r6rnZ2d@comcast.com>

Raymond Hettinger wrote:
> [Michele Simionato]
>>  Here and there I hear rumors about deprecating __del__ and
>> nothing
>> happens, are there any news about that? Expecially concerning Py3k?
> 
> I was writing a Py3K PEP advocating the elimination of __del__
> because:
> 
> * 'with closing()' and try/finally are the preferred ways of calling
> close()
> 
> * it is easy to accidently keep or introduce a reference that blocks
> the __del__ logic
> 
> * under-the-hood, the implementation of __del__ clashes badly with GC
> logic and is a maintenance nightmare
> 
> * the body of a __del__ method may unintentionally resurrect an object
> that was in the process of being deleted
> 
> For the PEP to have a chance, I neede to make build-outs to the
> weakref module so that existing use cases for __del__ can be easily
> migrated.  That hasn't been done yet, so the campaign to eliminate
> __del__ is stalled.

There were also a few recipes posted during this discussion that wrap 
weakrefs up a bit nicer so it's easier to use them in place of __del__:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/519635
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/519610
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/519621

Since they're using weakrefs, you shouldn't have to worry about some of 
the weirdness of __del__.

STeVe


From coolmann123 at hotmail.com  Sun Aug 12 05:46:15 2007
From: coolmann123 at hotmail.com (Hasipups)
Date: Sun, 12 Aug 2007 02:46:15 -0700
Subject: Very Intressting
Message-ID: <1186911975.907216.191110@l70g2000hse.googlegroups.com>

http://www.pennergame.de/ref.php?uid=5572



From bj_666 at gmx.net  Tue Aug 21 04:15:44 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 21 Aug 2007 08:15:44 GMT
Subject: File Read Cache - How to purge?
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
Message-ID: <5ivl9fF3rafecU1@mid.uni-berlin.de>

On Mon, 20 Aug 2007 21:06:43 -0700, Signal wrote:

> 1. I don't quite understand how after one full read of a file, another
> full read of the same file is "cached" so significantly while
> consuming so little memory. What exactly is being cached to improve
> the reading of the file a second time?

What do you mean by so little memory?  It (the whole file) is cached by the
operating system totally independent of your program, so the memory used
does of course not show up in the memory stats of your program.  Just
think about this: some file `a.dat` is cached by the OS and you start a
program that might eventually read that file.  The memory is used already
*before* the program starts and the OS does not know in advance which
files will be read by the program.  So how, why and when should the memory
used for the cache should be added to the programs memory stats.

> 2. Is there anyway to somehow to take advantage of this "caching" by
> initializing it without reading through the entire file first?

You mean reading the file without actually reading it!?  :-)

> 3. If the answer to #2 is No, then is there a way to purge this
> "cache" in order to get a more accurate result in my routine?  That is
> without having to read another large file first?

AFAIK no.

Ciao,
	Marc 'BlackJack' Rintsch


From rcdailey at gmail.com  Thu Aug 16 18:01:05 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Thu, 16 Aug 2007 17:01:05 -0500
Subject: Pass by reference or by value?
In-Reply-To: <fa2gbe$uq7$1@sea.gmane.org>
References: <496954360708161402x58faba47x7a6eae6e68f81d4@mail.gmail.com>
	<fa2gbe$uq7$1@sea.gmane.org>
Message-ID: <496954360708161501s541bddb7vfe168e4863f7f1e@mail.gmail.com>

So immutable objects cannot be modified directly? I guess this means
integers are immutable and the act of assigning to one is a completely new
definition? So if I were to create a class called Integer and give it a
.set() method, this would allow me to create mutable integers, and thus
passing in an object of type class Integer would allow me to modify the
value from inside the function?

On 8/16/07, Steve Holden <steve at holdenweb.com> wrote:
>
> Robert Dailey wrote:
> > Hi,
> >
> > I previously created a topic named "Pass by reference or by value" where
> > I inquired on how python's function parameters work. I received a lot of
> > nice responses, however I'm still confused on the topic. Note that I
> > come from a C++ background to Python, so any comparisons to C++ would be
> > very helpful.
> >
> > I ran a few tests. There's two tests in particular I wanted to show you
> > guys:
> >
> ------------------------------------------------------------------------------------------------
> > myvar = []
> >
> > def changeme( param ):
> >     param.append( "blah" )
> >     print param
> >
> > changeme( myvar )
> >
> > print myvar
> >
> > The above code yields the following output:
> > ['blah']
> > ['blah']
> >
> > This means that the list passed in was modified by the function.
> >
> ------------------------------------------------------------------------------------------------
> > Now test case 2:
> >
> > myvar = 4
> >
> > def changeme( param ):
> >     param = 5
> >     print param
> >
> > changeme( myvar )
> >
> > print myvar
> >
> > The above code yields the following output:
> > 5
> > 4
> >
> > This means that the integer passed in was NOT modified by the function.
> >
> ------------------------------------------------------------------------------------------------
> >
> > Between these two tests, both types passed in are mutable objects. I'm
> > having trouble figuring out what mandates an object to be changed from
> > within a function versus not. What is happening in test case 2 to cause
> > it to not be modified?
> >
> > Thanks for reading guys. Hopefully one day I'll understand this lol.
> >
> The first thin to realise is that all Python names are just bindings to
> values. In C++ terms you can think of them all as pointers.
> De-referencing is automatic when a value is to be retrieved.
>
>
> >>> def changeme( param ):
> ...     param = 3
> ...     print param
> ...
> >>> myvar = []
> >>> changeme(myvar)
> 3
> >>> myvar
> []
> >>>
>
> In this case there is no attempt to mutate the argument, the argument
> name is simply bound to another value. Since the argument is a name
> local to the function, this does not result in any change outside the
> function.
>
> In this case the argument is bound to a mutable value, so the call to
> append mutates the object (a list) referenced by the argument.
>
> Unlike C++ and similar languages a variable does not hold a value, it
> holds a pointer to a value. When a list is passed as a function argument
> the reference to the list is copied into the argument. Does this help at
> all?
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd           http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Aug 20 19:00:34 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 21 Aug 2007 01:00:34 +0200
Subject: Any advice on ways for sharing a small Python application with
	the world?
References: <1187647187.137812.158130@22g2000hsm.googlegroups.com>
Message-ID: <5iukoiF3rfrd3U1@mid.individual.net>

Bert Heymans wrote:

> does anyone know of other ways to share something that might just
> be too small for a sourceforge project but too big to be a
> snippet? 

You could submit it to <http://pypi.python.org/>.

Regards,


Bj?rn

-- 
BOFH excuse #271:

The kernel license has expired



From zentraders at gmail.com  Fri Aug 17 17:20:21 2007
From: zentraders at gmail.com (Zentrader)
Date: Fri, 17 Aug 2007 14:20:21 -0700
Subject: Array and floating point
In-Reply-To: <1187384816.251783.95410@19g2000hsx.googlegroups.com>
References: <1187384816.251783.95410@19g2000hsx.googlegroups.com>
Message-ID: <1187385621.417047.274120@x35g2000prf.googlegroups.com>

On Aug 17, 2:06 pm, Jonathan Shan <jons... at winlab.rutgers.edu> wrote:
> Hello,
>
> I'm experiencing a problem where the float being appended to the array
> is not the same as the result of the appending.
>
> >>> from array import *
> >>> x = array('f')
> >>> x.append(float("0.1"))
> >>> x[0]
> 0.10000000149011612
> >>> float("0.1")
>
> 0.10000000000000001
>
> I'm expecting x[0] = 0.10000000000000001
>
> Thanks
> Jonathan Shan

Floating point precision problems on x86 type machines is well
documented on the web if you want to know more about it.  For your
example use Python's decimal class instead of floating point.  Gmpy is
also available for scientific type apps,
http://docs.python.org/lib/module-decimal.html
http://pydoc.org/2.4.1/decimal.html
http://gmpy.sourceforge.net/
import decimal
x = decimal.Decimal( "0.1" )
print x
y = decimal.Decimal( "0.10000000000000001" )
print y
print y/x
print y*x



From gagsl-py2 at yahoo.com.ar  Thu Aug  2 19:49:57 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 02 Aug 2007 20:49:57 -0300
Subject: frequency analysis of a DB column
References: <1186021313.413443.184060@i38g2000prf.googlegroups.com>
	<op.twexqextx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
	<1186057726.3388.6.camel@dot.uniqsys.com>
Message-ID: <op.twghtjmqx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 02 Aug 2007 09:28:46 -0300, Carsten Haese <carsten at uniqsys.com>  
escribi?:

> On Thu, 2007-08-02 at 00:38 -0300, Gabriel Genellina wrote:
>>
>> select column, count(column), min(column), max(column)
>>  from table
>> group by column
>> order by count(column) desc
>
> What's the point of including min(column) and max(column)? They're
> always going to be equal to column.

To waste a few more microcalories moving my fingers typing nonsense?

-- 
Gabriel Genellina



From mail at timgolden.me.uk  Fri Aug 24 04:14:10 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 24 Aug 2007 09:14:10 +0100
Subject: How would I go about making a file open. Not the way you might
	think.
In-Reply-To: <eb79828c0708231355n6c342384r2edb99e13106e19d@mail.gmail.com>
References: <eb79828c0708221959t18dd4024m251c1eac7732ec1f@mail.gmail.com>	<mailman.159.1187857019.32294.python-list@python.org>	<ntSdnapifutBbFDbnZ2dnUVZ_tWtnZ2d@comcast.com>
	<eb79828c0708231355n6c342384r2edb99e13106e19d@mail.gmail.com>
Message-ID: <46CE9352.7060007@timgolden.me.uk>

[... snip extended discussion on opening text files ...]

Lamonte Harris wrote:
 > I've completed this request and I got the answer already.

Yes, but discussions here never simply end when the answer
is found! :)

TJG


From ajmacd at ns.sympatico.ca  Sun Aug 12 20:45:47 2007
From: ajmacd at ns.sympatico.ca (Aaron J. M.)
Date: Sun, 12 Aug 2007 17:45:47 -0700
Subject: Pausing and Unpausing Threads
In-Reply-To: <1186950645.886995.56060@w3g2000hsg.googlegroups.com>
References: <1186883176.319755.304970@d55g2000hsg.googlegroups.com>
	<13bulsklq359q8f@corp.supernews.com>
	<1186950645.886995.56060@w3g2000hsg.googlegroups.com>
Message-ID: <1186965947.914607.222260@o61g2000hsh.googlegroups.com>

Uhg, I thought of something I didn't consider before: how to cleanly
end the Server/DirectedControl(l)er process.  Assuming that the Client
only sends Actions to the DirectedController while the
DirectedController is in its turn() method (which I would probably
regulate using some flag in DirectedController) the Client will
eventually need a way to order the Server to stop its processing.
Stopping the Server also has to make the DirectedController break out
of its turn method without letting it execute an Action.  I don't want
to just kill the Server thread because I may want to do serialization
or other kinds of cleanup.

Have people encountered something like this before?

Thank you,

Aaron J. M.



From vasudevram at gmail.com  Fri Aug 10 06:05:16 2007
From: vasudevram at gmail.com (vasudevram)
Date: Fri, 10 Aug 2007 10:05:16 -0000
Subject: Python MAPI
In-Reply-To: <1185196021.512126.93490@r34g2000hsd.googlegroups.com>
References: <1184954229.222401.213380@k79g2000hse.googlegroups.com>
	<1184957337.367674.104760@i13g2000prf.googlegroups.com>
	<1184959701.447824.70890@q75g2000hsh.googlegroups.com>
	<1184960314.426690.238270@z28g2000prd.googlegroups.com>
	<1184965933.212060.214800@m3g2000hsh.googlegroups.com>
	<1185134453.934837.325310@w3g2000hsg.googlegroups.com>
	<1185196021.512126.93490@r34g2000hsd.googlegroups.com>
Message-ID: <1186740316.816775.130500@m37g2000prh.googlegroups.com>

On Jul 23, 6:07 pm, kyoso... at gmail.com wrote:

>Well, I ran Process Monitor with some filters enabled to only watch
Thunderbird and MS Word. Unfortunately, that didn't give me any of the
registry edits, so I disabled my filters and ran it without. Now I
have a log file with 28,000 entries. It's amazing to see all the stuff
that happens in just a few moments, but how am I supposed to parse
this mess?

Explorer.exe and outlook express do thousands of the registry calls
and the paths they manipulate vary wildly. Oh well, I'll be off the
clock in about 15 minutes so it can wait until Monday.

Thanks for your help. I'll post if I figure out anything...hopefully
you'll do the same.

---

Sorry for not replying earlier ... I searched this list for the topic
(Python MAPI) a few times but couldn't find it - not sure why - maybe
Google Groups's indexing gets messed up sometimes ...

Yes, so many entries would be a problem to parse manually ...

That's why I suggested using a grep for Windows - or, preferably, an
egrep - which is a more powerful version of grep; e.g. basic grep only
allows you to use one regexp at a time - while egrep allows you to use
extended regular expressions, such as "pattern1|pattern2", also
"patt(e|u)rn(1|2)" which looks in parallel for pattern1, patturn1,
pattern2 and patturn2 - I used a made-up example where the spelling of
pattern could be wrong, but it works for any other cases of
alternative patterns and subpatterns as well. Not sure if there is any
egrep for Windows - try Googling. If not, and the problem is important
enough, you might want to install Cygwin (its a big download, so first
check if it _does_ have egrep in it).

Vasudev





From goldtech at worldpost.com  Sat Aug  4 14:26:09 2007
From: goldtech at worldpost.com (goldtech)
Date: Sat, 04 Aug 2007 11:26:09 -0700
Subject: frequency analysis of a DB column
In-Reply-To: <1186099294.343121.50240@d30g2000prg.googlegroups.com>
References: <1186021313.413443.184060@i38g2000prf.googlegroups.com>
	<1186099294.343121.50240@d30g2000prg.googlegroups.com>
Message-ID: <1186251969.622604.178940@d30g2000prg.googlegroups.com>

Just wanted to thank the Posters for the help!

Thanks.

Lee G.




From sturlamolden at yahoo.no  Fri Aug 17 17:40:11 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: Fri, 17 Aug 2007 14:40:11 -0700
Subject: Can python threads take advantage of use dual core ?
In-Reply-To: <1187366443.621295.97020@e9g2000prf.googlegroups.com>
References: <1187366443.621295.97020@e9g2000prf.googlegroups.com>
Message-ID: <1187386811.454645.298710@g4g2000hsf.googlegroups.com>

On Aug 17, 6:00 pm, nikhilketkar <nikhilket... at gmail.com> wrote:


> What are the implications of the Global Interpreter Lock in Python ?

This is asked every second week or so.

The GIL is similar to the Big Kernel Lock (BKL) use to support SMPs in
older versions of the Linux kernel. The GIL prevents the Python
interpreter to be active in more than one thread at a time.

If you have a single CPU with a single core, the GIL has no
consequence what so ever.

If you have multiple CPUs and/or multiple cores, the GIL has the
consequence that you can forget about SMP scalability using Python
threads. SMP scalability require more fine grained object locking,
which is what the Java and .NET runtimes do, as well as current
versions of the Linux kernel. Note that IronPython and Jython use fine
grained locking instead of a GIL.

> Does this mean that Python threads cannot exploit a dual core
> processor and the only advantage of using threads is in that
> computation and IO-bound operations can continue in parallel ?


The Python standard library releases the GIL in read/write operations
for e.g. files and sockets. This can be combined with threads to allow
multiple IO operations to continue in parallel. The GIL has no or very
little significance for IO-bound scalability in Python.

CPU-bound tasks are a different game. This is where the GIL matter.
You must either release the GIL or use multiple processes for
exploiting multiple processors in an SMP computer with Python. The GIL
can be released explicitely in C extension code. f2py and ctypes can
also release the GIL.

Note that you would NOT use threads for speeding up CPU-bound
operations, even when programming in C or Fortran. Threads are neither
the only nor the preferred way to exploit multicore CPUs for CPU-bound
tasks. Instead of threads, use either an MPI library or OpenMP
compiler pragmas. You can use MPI directly from Python (e.g. mpi4py),
or you can use OpenMP pragmas in C or Fortran code which you call
using ctypes or f2py.

Summary:

Use Python threads if you need to run IO operations in parallel.
Do not use Python threads if you need to run computations in parallel.



Regards,
Sturla Molden





From gatti at dsdata.it  Mon Aug 13 07:44:45 2007
From: gatti at dsdata.it (gatti at dsdata.it)
Date: Mon, 13 Aug 2007 04:44:45 -0700
Subject: Eclipse/PyDev question
In-Reply-To: <1186998539.030727.279330@g4g2000hsf.googlegroups.com>
References: <1186998539.030727.279330@g4g2000hsf.googlegroups.com>
Message-ID: <1187005485.137101.43130@l70g2000hse.googlegroups.com>

On Aug 13, 11:48 am, king kikapu <aboudou... at panafonet.gr> wrote:
> Hi,
>
> i am using Eclipse (Platform Runtime binary) with PyDev and i was
> wondering if someone can help me with this:
>
> 1. I set breakpoints to a .py file and i have told Eclipse to open the
> Debug perspective when it sees that some .py file(s) of my project
> indeed contains breakpoints. So, i press F9,  Eclipse starts, Debug
> perspective opens and i can use the debugger just fine. But when the
> app terminates, how can i tell Eclipse to switch automatically to the
> PyDev perspective and not remain in the Debug one ?

You don't, Eclipse keeps the same perspective because for what it
knows you might want to debug some more and it correctly avoids to
decide what is good for you. Switching to the debug perspective when
you issue a debug command is an exception to the normal switching of
perspectives with the respective big buttons and the menu.
If you wish to switch perspective to edit code before debugging again,
putting editors and appropriate accessory views in the debug
perspective might be good enough.

> 2. Let's say we have a project that consists of some .py files. I want
> to press F9 when the editor displays anyone of these files but make
> Eclipse to run the whole project (that has another .py as "default")
> and not the script that i am currently working on, is that possible ??

Executing the current file is a bad habit, Eclipse remembers a list of
execution/debug configurations that can be selected from a dropdown
list in the toolbar and edited with a dialog box; after you setup
entry points for a project you can use and edit them as needed.
I'm using Eclipse for Java and my entry points include remote
debugging of a GUI application, about 6 JUnit tests, about 3 command
line tools with many complex parameter sets each, and some Ant builds;
it would take about one hour of trial and error to reconstruct the
command lines, classpaths and JVM options. I only run the current file
as a draft for an edited configuration.

Regards,
Lorenzo Gatti



From DustanGroups at gmail.com  Sat Aug 11 22:10:26 2007
From: DustanGroups at gmail.com (Dustan)
Date: Sun, 12 Aug 2007 02:10:26 -0000
Subject: python 2.5 bug
In-Reply-To: <MPG.2127cabf99116e6a9896fe@news.individual.de>
References: <1186825286.493878.80380@l70g2000hse.googlegroups.com>
	<MPG.2127cabf99116e6a9896fe@news.individual.de>
Message-ID: <1186884626.597028.246990@57g2000hsv.googlegroups.com>

On Aug 11, 12:32 am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> 4. don't do something you don't fully understand (in this case
>    installing Python 2.5 and uninstalling Python 2.4)

If we were all limited by that rule, none of us would never have used
a computer in the first place. Operating a computer is a learning
experience, no matter what level you're at (although admittedly the
lessons learned can sometimes be hurtful).



From jiapengjun at gmail.com  Wed Aug 22 10:42:35 2007
From: jiapengjun at gmail.com (Jiapj)
Date: Wed, 22 Aug 2007 14:42:35 -0000
Subject: libgmail failure
In-Reply-To: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
References: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
Message-ID: <1187793755.710417.52730@z24g2000prh.googlegroups.com>

I met the same problem now,  James , do you  have resolved this
problem ?

On Aug 22, 5:07 am, "james.p.n... at gmail.com" <james.p.n... at gmail.com>
wrote:
> Hey all,
>
> I've been using libgmail to send out automated notification emails for
> my company's nightly regression testing.  Last night these emails
> started failing, though the python code has not changed.  I updated to
> the latest libgmail, but that isn't helping.  I've logged in to the
> email account directly, and the account is still working fine.
>
> The error I get is "HTTP Error 400: Bad Request" when using
> gmailAccount.login().  This doesn't throw an exception, just prints
> the error.  The code crashes outright when it tries to send mail.
>
> This code has been up and running for several months and just started
> failing last night.  Does anyone have an idea what's going on?
>
> The code and error follow (fairly short :-)
>
> Thanks much,
> James
>
> Code:
> -------------------------------------------------------------------------------------------------------
> def send(TO_LIST,SUBJECT,MESSAGE):
>     GA = libgmail.GmailAccount("xxx... at gmail.com","xxxxxxx")
>     try:
>         print "Logging in"
>         GA.login()
>     except libgmail.GmailLoginFailure:
>         print "\nLogin failed. (Wrong username/password?)"
>     else:
>         print "Log in successful.\n"
>         for RX in TO_LIST:
>             MSG = libgmail.GmailComposedMessage(RX,SUBJECT,MESSAGE)
>             if GA.sendMessage(MSG):
>                 print "Message successfully sent to `%s` ." % RX
>             else:
>                 print "Could not send message."
> -------------------------------------------------------------------------------------------------------
>
> Output:
> -------------------------------------------------------------------------------------------------------
> Logging in
> HTTP Error 400: Bad Request
> Log in successful.
>
> No messages found
> Traceback (most recent call last):
>   File "C:\projects\physware\testCases\PythonTestScripts
> \SendEmail.py", line 58, in <module>
>     main()
>   File "C:\projects\physware\testCases\PythonTestScripts
> \SendEmail.py", line 55, in main
>     send(TO_LIST,SUB,MSG)
>   File "C:\projects\physware\testCases\PythonTestScripts
> \SendEmail.py", line 39, in send
>     if GA.sendMessage(MSG):
>   File "C:\projects\physware\testCases\PythonTestScripts\libgmail.py",
> line 588, in sendMessage
>     U_ACTION_TOKEN: self._getActionToken(),
>   File "C:\projects\physware\testCases\PythonTestScripts\libgmail.py",
> line 563, in _getActionToken
>     at = self._cookieJar._cookies[ACTION_TOKEN_COOKIE]
> KeyError: 'GMAIL_AT'
> -------------------------------------------------------------------------------------------------------




From rcdailey at gmail.com  Mon Aug 20 12:12:47 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 20 Aug 2007 11:12:47 -0500
Subject: Problem with Thread.join()
In-Reply-To: <8a6b8e350708200758w640fd7c4w5bd19fb53decde71@mail.gmail.com>
References: <496954360708131610i62c0a63aneb7c39d23a052ac0@mail.gmail.com>
	<op.txcl3yoox6zn5v@a98gizw.cpe.telecentro.net.ar>
	<8a6b8e350708200758w640fd7c4w5bd19fb53decde71@mail.gmail.com>
Message-ID: <496954360708200912i8479cb5l1442451944e4d714@mail.gmail.com>

Hey guys,

Sorry for taking so long to respond. I had actually figured out what
this issue is over on the wxPython mailing list. The issue was that I
was attempting to configure wxPython controls from a remote thread,
which is apparently illegal due to some state persistance issues.

Thanks all for responding and I do apologize for not having given
proper code snippets on my first post. Take care all.

On 8/20/07, James Matthews <nytrokiss at gmail.com> wrote:
> Post some code so we can see the issue! I would say that the issue is where
> your function that you are calling isn't exiting!
>
>
> On 8/20/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
> > En Mon, 13 Aug 2007 20:10:53 -0300, Robert Dailey <rcdailey at gmail.com>
> > escribi?:
> >
> > > I have a class that derives from threading.Thread. To signal the thread
> > > to
> > > exit its infinite loop, I set an Event. Once the thread checks
> > > Event.isSet()
> > > and it is true, it proceeds to break out of the loop and exit the
> > > function.
> > > In the main thread, right after calling Event.set(), I call
> > > Thread.join() to
> > > wait on the thread to exit. However, if I call Thread.join() the
> > > application
> > > locks up because for some reason calling Thread.join() prevents the
> > > thread
> > > from exiting. I don't know why. Any help? Thanks...
> >
> > Conceptually you're doing it the right way. Post some code demonstrating
> > the problem...
> >
> > --
> > Gabriel Genellina
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
>
>
>
> --
> http://www.goldwatches.com/
> http://www.jewelerslounge.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>

From pyth0nc0d3r at gmail.com  Tue Aug 28 01:04:09 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Tue, 28 Aug 2007 00:04:09 -0500
Subject: Python Classes
Message-ID: <eb79828c0708272204y3b9f6503x843c66eb2ecb685b@mail.gmail.com>

How come you have to set the initialized created variables to equal the
parameters, shouldn't that be default?

class testing:
         def __init__(self,testing):
                   self.testing = testing
x = testing("testing")
print x.testing


How come self.testing = testing

Can someone explain that in more detail, just confused on why you have to
set it up like that.
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From eugene.vandenbulke at gmail.com  Sun Aug 26 03:26:15 2007
From: eugene.vandenbulke at gmail.com (EuGeNe Van den Bulke)
Date: Sun, 26 Aug 2007 09:26:15 +0200
Subject: ActiveRecord for Python/MySQL
References: <1188103880.146814.110780@q4g2000prc.googlegroups.com>
Message-ID: <far9ul$vb3$1@aioe.org>

Devraj wrote:
> My application uses MySQL as a backend and am using the MySQL/Python
> bindings. Are there any libraries that provide a database abstraction
> layer like Activerecords for Python?'

SQLObject
SQLAclhemy
DejaVu
Storm

Google for Python ORM you may find more!

EuGeNe -- http://www.3kwa.com


From gtcopeland at gmail.com  Wed Aug 22 09:01:47 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: Wed, 22 Aug 2007 13:01:47 -0000
Subject: Fast socket write
In-Reply-To: <46cba22b$1_1@news.chariot.net.au>
References: <1187744469.240933.149610@r23g2000prd.googlegroups.com>
	<46cba22b$1_1@news.chariot.net.au>
Message-ID: <1187787707.377952.322280@57g2000hsv.googlegroups.com>

On Aug 21, 9:40 pm, Bikal KC <nepbabucxspamf... at yahoo.ca> wrote:
> Greg Copeland wrote:
> > I'm having a brain cramp right now.  I can't see to recall the name of
>
> Is your cramp gone now ? :P


I wish.  If anyone can remember the name of this module I'd realy
appreciate it.

Greg



From uymqlp502 at sneakemail.com  Fri Aug 31 01:56:54 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Thu, 30 Aug 2007 22:56:54 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188534061.243009.89640@m37g2000prh.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<1188534061.243009.89640@m37g2000prh.googlegroups.com>
Message-ID: <1188539814.800466.6930@r23g2000prd.googlegroups.com>


> Python really isn't suitable for in-flight controls > for various
> reasons, and mission critical concerns is a minor one (systems with

Do you know anything about the FAA certification process for flight-
critical systems? I am not an expert on it, but I know it is very
expensive. If I am not mistaken, getting such code certified is more
expensive than developing it in the first place. Why would that be so
if, as you claim, "mission critical concerns is a minor one"?



From steve at holdenweb.com  Tue Aug 14 21:41:57 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 14 Aug 2007 21:41:57 -0400
Subject: What order does info get returned in by os.listdir()
In-Reply-To: <1187131583.114731.279180@g12g2000prg.googlegroups.com>
References: <gemini.jms7ay00fafcf00k8@jernic.by.invalid>
	<1187131583.114731.279180@g12g2000prg.googlegroups.com>
Message-ID: <f9tlku$8j5$1@sea.gmane.org>

Zentrader wrote:
> On Aug 14, 1:52 pm, Jeremy C B Nicoll <jer... at blueyonder.co.uk> wrote:
>> What order does info get returned in by os.listdir() ?
>>
>> I'm just starting to write python code, on an Win XP Pro machine.  I've got
>> various directories which, when I look at them in Win XP, sorted by name, I
>> see in order, eg:
>>
>>    ~prefixed file   .txt
>>    A.txt
>>    B.txt
>>    ...
>>    Z.txt
>>
>> ie, XP seems to think that files with a "~" as their first character are
>> sorted ahead of A.
>>
>> When I use os.listdir() to return that list of leaf values, I do seem to get
>> them in alphabetical order, A before B before C etc, but the ~-prefixed ones
>> are returned after the Z-prefixed files rather than before the A-ones.
>>
>> I was wondering why...
>>
>> --
>> Jeremy C B Nicoll - my opinions are my own.
> 
> I think that os.listdir() returns file names in chronological order,
> that is in the order they were created on disk.  If there is any
> sorting done it will be in ASCII order.  All data is stored as a
> number so it is sorted that way.  ord("~")= 126, and ord("Z")=90 so it
> makes sense that "~" is after "Z".
> 
You can think what you like, but reading the documentation is usually a 
more reliable way to resolve uncertainties, and it says:

"""The list is in arbitrary order."""

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From kwmsmith at gmail.com  Mon Aug 13 12:35:49 2007
From: kwmsmith at gmail.com (Kurt Smith)
Date: Mon, 13 Aug 2007 11:35:49 -0500
Subject: Drawing a graph
In-Reply-To: <20070812220911.fd2948e1.ghirai@ghirai.com>
References: <20070812220911.fd2948e1.ghirai@ghirai.com>
Message-ID: <c266a7930708130935i6afb72a7wd173fbe9e15a4a9b@mail.gmail.com>

On 8/12/07, Ghirai <ghirai at ghirai.com> wrote:
> Hello list,
>
> I need to draw a graph, 2 axes, 2D, nothing fancy.
> One of the axes is time, the other one is a series of integers.
>
> I don't care much about the output format.
>
> Are there any specialized libraries for this, or should i use PIL?
>
> Thanks.
>
> --
> Regards,
> Ghirai.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Checkout matplotlib: http://matplotlib.sourceforge.net/

Powerful (esp. with IPython), clean implementation, very nice output,
IMHO.  It does depend on some other things; primarily numpy and some
sort of backend for displaying figures (usually can use a default
backend -- e.g. Tkinter).  Otherwise you can plot directly to file.
May not be what you're looking for if you want something quick.

HTH,

Kurt


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Aug 16 08:58:11 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 16 Aug 2007 14:58:11 +0200
Subject: Coroutines and argument tupling
References: <mailman.2032.1187207899.22759.python-list@python.org>
	<5ih63mF3pvnt7U1@mid.individual.net>
	<87k5rwo24e.fsf@seneca.iss.local>
	<5iikd6F3pfrhrU1@mid.individual.net>
	<mailman.2053.1187264251.22759.python-list@python.org>
Message-ID: <5iivv3F3q6b76U1@mid.individual.net>

Marshall T. Vandegrift wrote:

> I'd seen the consumer decorator, and it certainly is cleaner than
> just using a generator.  I don't like how it hides the parameter
> signature in the middle of the consumer function though, and it
> also doesn't provide for argument default values.  

Mh, that may be. :( I didn't use it much yet.
 
> Thanks in any case for the replies!  Since I've apparently decided
> my ArgPacker is worth it, the complete code for my coroutine
> decorator follows.

Thanks for reporting back, and happy coding.

Regards,


Bj?rn

-- 
BOFH excuse #198:

Post-it Note Sludge leaked into the monitor.



From wdraxinger at darkstargames.de  Mon Aug  6 07:27:10 2007
From: wdraxinger at darkstargames.de (Wolfgang Draxinger)
Date: Mon, 06 Aug 2007 13:27:10 +0200
Subject: Best programs written completly in Python
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
Message-ID: <e5djo4-gt9.ln1@darkstargames.dnsalias.net>

Franz Steinh?usler wrote:

> wWhat are the best programs in your opinion, written entirly
> in pyhton, divided into categories like:
> a) Games
> b) Utilities/System
> c) Office
> d) Web/Newsreader/Mail/Browser

BitTorrent. It may not seem much but it's a really cool package.
Especially you don't have to use the standard frontends, but can
also use BitTorrent modules in your own Python programs.

Wolfgang Draxinger
-- 
E-Mail address works, Jabber: hexarith at jabber.org, ICQ: 134682867



From a.harrowell at gmail.com  Wed Aug  8 10:54:33 2007
From: a.harrowell at gmail.com (a.harrowell at gmail.com)
Date: Wed, 08 Aug 2007 14:54:33 -0000
Subject: SciPy's site is down
Message-ID: <1186584873.075215.326620@b79g2000hse.googlegroups.com>

Can anyone else not reach scipy.org? Am trying to install scipy and
numpy. Further, is there an equivalent of numpy that will install
correctly on Python 2.5 on WinVista?



From gheize at gmail.com  Thu Aug 30 08:58:40 2007
From: gheize at gmail.com (Guillermo Heizenreder)
Date: Thu, 30 Aug 2007 09:58:40 -0300
Subject: problem with SQLObject + mysql
In-Reply-To: <1188469992.27740.14.camel@leinad-desktop>
References: <1188469992.27740.14.camel@leinad-desktop>
Message-ID: <1188478720.27740.42.camel@leinad-desktop>

El jue, 30-08-2007 a las 07:33 -0300, Guillermo Heizenreder escribi?:
> Hi list I'm new whit SQLObjet. 
> I'm study the tutorial:Connecting databases to Python with SQLObjet[1]
> 
> My problem is:
> >>>from sqlobject.mysql import builder
> >>>con=builder()(user='dbuser',passwd='dbpassword',host='localhost',db='garbanzo')
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File
> "/usr/lib/python2.5/site-packages/SQLObject-0.9.1-py2.5.egg/sqlobject/mysql/mysqlconnection.py", line 51, in __init__
>     DBAPI.__init__(self, **kw)
>   File
> "/usr/lib/python2.5/site-packages/SQLObject-0.9.1-py2.5.egg/sqlobject/dbconnection.py", line 249, in __init__
>     DBConnection.__init__(self, **kw)
> TypeError: __init__() got an unexpected keyword argument 'passwd'

__ini__() got an keyword argument 'password' not 'passwd'

> 
> First i creating the user mysql:
>  guille at leinad-desktop:~$ mysql -u root
>  mysql> use mysql;
>  Database changed
>  mysql> create database garbanzo;
>  Query OK, 1 row affected (0.02 sec)
>  mysql> grant all privileges on garbanzo to 'dbuser'@'localhost'
> identified by 'dbpassword';
>  Query OK, 0 rows affected (0.10 sec)
>  mysql> flush privileges;
>  Query OK, 0 rows affected (0.09 sec)
> 
> 
> So... how i do to connect?. how create de password correctly? 

> Thanks and kind regards from Argentina.
> P/D: my English it to bad, I'm a novice, :P.
> 
> [1]http://www-128.ibm.com/developerworks/library/os-pythonsqlo/index.html?ca=drs#resources



From eggie5 at gmail.com  Thu Aug  9 19:47:41 2007
From: eggie5 at gmail.com (eggie5)
Date: Thu, 09 Aug 2007 23:47:41 -0000
Subject: beginner whitespace question
Message-ID: <1186703261.136506.208660@x35g2000prf.googlegroups.com>

I keep getting an error for line 7, what's wrong with this?

from django.db import models

class Poll(models.Model):
    question = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')

	def __unicode__(self):
		return self.question

	def was_published_today(self):
	        return self.pub_date.date() == datetime.date.today()

class Choice(models.Model):
    poll = models.ForeignKey(Poll)
    choice = models.CharField(max_length=200)
    votes = models.IntegerField()

	def __unicode__(self):
		return self.choice



From ninja.krmenadl at nes.com  Fri Aug 10 11:47:30 2007
From: ninja.krmenadl at nes.com (Boris Ozegovic)
Date: Fri, 10 Aug 2007 17:47:30 +0200
Subject: cookielib
Message-ID: <f9i1ah$e3v$1@localhost.localdomain>

Hi

I have HTTP client which accepts cookies.  If client allready has cookie,
but that cookie has expired, server sends him new cookie, and in response
object Set-Cookie: header everything is fine, but if I reload request,
client sends expired cookie, and not the new one.  In cookiejar there is
only new and valid cookie, and if I use regular browser everything is fine.
The code is following:

urlopen = urllib2.urlopen
Request = urllib2.Request
cj = cookielib.LWPCookieJar()
COOKIEFILE = 'cookies.lwp'
	
if os.path.isfile(COOKIEFILE):
# if we have a cookie file already saved
# then load the cookies into the Cookie Jar
    cj.load(COOKIEFILE)

opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
urllib2.install_opener(opener)
url = "http://localhost:8000/files/index.html"
params = {'question':question}
data = urllib.urlencode(params)
Request(url, data)
try:
    response = urlopen(Request)
    etc.
    
Only if I create new request object the new cookie is send, but I don't
want to create new object.  And idea?    
    
-- 
Ne dajte da nas la?ljivac Bandi? truje:
http://cnn.blog.hr/arhiva-2007-06.html#1622776372


From gerdusvanzyl at gmail.com  Sun Aug 26 15:55:14 2007
From: gerdusvanzyl at gmail.com (Gerdus van Zyl)
Date: Sun, 26 Aug 2007 12:55:14 -0700
Subject: New UI Toolkit
In-Reply-To: <46d1d363$0$404$426a74cc@news.free.fr>
References: <1188146822.129605.160560@22g2000hsm.googlegroups.com>
	<46d1d363$0$404$426a74cc@news.free.fr>
Message-ID: <1188158114.580706.262150@19g2000hsx.googlegroups.com>


> But I'm afraid with the Swing-like interface, i.e : did you use the same
>   widget positionning ?

Not sure what you mean, but each parent widget is responsible for
rendering and positioning the children. Can use layout managers, two
currently absolute and simple flow. ( In the screenshot, the gradients
are in a flow panel)



From no.reply at here.com  Sun Aug 19 10:41:32 2007
From: no.reply at here.com (Anonymous)
Date: Sun, 19 Aug 2007 15:41:32 +0100
Subject: Newbie question
Message-ID: <eoCdnQvZBMj_y1XbRVnysAA@bt.com>

I have exp with C/C++ (and a few other langs). I want to use Python to 
start doing the ff:

1). Data Munging (text processing)
2). Automating my build process
3). (Possibly) some web data retrieval jobs

Can anyone point me to resurces/possibly scripts that can get me up to 
speed (to do these 3 things) ASAP, without having to learn the basics of 
programming?


From oliver at ootbc.com  Sat Aug 18 00:57:39 2007
From: oliver at ootbc.com (Oliver Nelson)
Date: Sat, 18 Aug 2007 04:57:39 GMT
Subject: Cancelling events on a COM Object
In-Reply-To: <fa2o1q$8st$1@zinnia.noc.ucla.edu>
References: <bF3xi.1834$4w7.1163@newssvr22.news.prodigy.net>
	<fa2o1q$8st$1@zinnia.noc.ucla.edu>
Message-ID: <7%uxi.46771$Um6.36697@newssvr12.news.prodigy.net>

James,

I was getting an error everytime so I thought I had a setup problem...

Sorry everybody...

OLIVER

James Stroud wrote:
> Oliver, wait a while before you panic about your post not getting through!
> 
> James
> 


From ricaraoz at gmail.com  Fri Aug 17 12:40:40 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Fri, 17 Aug 2007 13:40:40 -0300
Subject: Hiding / encrypting source code
In-Reply-To: <1187110504.154878.317460@19g2000hsx.googlegroups.com>
References: <1187107452.905165.45700@l70g2000hse.googlegroups.com>
	<1187110504.154878.317460@19g2000hsx.googlegroups.com>
Message-ID: <46C5CF88.7040409@bigfoot.com>

Hi, I'm new to this python stuff so maybe I'm stating the obvious, or
worse, maybe I'm completely off track.

Not long ago someone was asking about a way to hide source code. I
stumbled upon zipimport standard module. It seems it lets you get your
imports from zip files. The docs say it is implicitly called, so you
could have your modules in a zipped file. That should make them a bit
more arcane.
Another idea would be to modify this module to use encrypted zip files,
or to use PyCrypto or some other module as a middle man in order to keep
the contents encrypted.

HTH




From nospam.themindstorm at gmail.com  Thu Aug  2 04:06:12 2007
From: nospam.themindstorm at gmail.com (Alex Popescu)
Date: Thu, 2 Aug 2007 08:06:12 +0000 (UTC)
Subject: Where do they tech Python officialy ?
References: <1185209574.045112.163780@g4g2000hsf.googlegroups.com>
	<7xveca4ajp.fsf@ruckus.brouhaha.com>
	<1185265091.276958.239910@r34g2000hsd.googlegroups.com>
	<1i23wyk.avc945i4dwsiN%aleax@mac.com>
	<mailman.1423.1185957645.22759.python-list@python.org>
	<1i25pjo.1mo5uqc1yxqsjkN%aleax@mac.com>
	<mailman.1471.1186012676.22759.python-list@python.org>
	<1i26u6o.pthuan2j7nufN%aleax@mac.com>
Message-ID: <Xns9980709B82650themindstorm@80.91.229.5>

aleax at mac.com (Alex Martelli) wrote in news:1i26u6o.pthuan2j7nufN%
aleax at mac.com:

> Alex Popescu <nospam.themindstorm at gmail.com> wrote:
>    ...
>> Have you seen/heard of Jim lately? Cause I haven't. By the time he 
was
>> the lead of the AspectJ team his charismatic presence was everywhere 
(at
>> least around that project).
> 
> He wasn't at OSCON this year, but I hope to see him at Pycon next 
year.
> I don't see this as a deep dark M$ plot to kidnap and hide the best 
and
> brightest Open Sourcers, because I know what it means to get a 
wonderful
> challenging new job and pour all you have into it (I've had to skip a
> couple Pycons, myself, though I hope to be back next year).
> 

I wasn't trying to imply that (maybe just as a joke ;-)). It was more a 
personal curiosity.

> 
>> However I do agree with you. The only remark is that US trends are 
not
>> hitting my part of Eu so quickly ;-) (things are indeed changing).
> 
> About 3 years ago I was also getting sick and tired about my own part 
of
> the EU, which is part of why I emigrated:-).  I do see things getting
> better in Southern Europe, albeit from a distance.
>

Guess we both know the feeling then.
 
> 
>> > These are the ones you don't wan't to work for anyway !-)
>> 
>> Well... this is sometimes debatable :-).
> 
> A totally clueless employer may still be a way to make some quick and
> dirty money right now, but it will barely be enough to pay for the 
extra
> Maalox and Zantac you'll need.  Looking back on your life when you're
> closer to retirement than to when you started working, you'll see what 
a
> mistake it was to accept clueless-employers' offers, and how much
> happier your life would have been if you'd known that up front:-).
>

He he... been there done that :-). Escaped only with couple of Maalox, 
though :-).

bests,
./alex
--
.w( the_mindstorm )p.
 
> 
> Alex




From steve at holdenweb.com  Mon Aug  6 19:01:12 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Aug 2007 19:01:12 -0400
Subject: Something in the function tutorial confused me.
In-Reply-To: <5hp6d1F3kl28iU4@mid.uni-berlin.de>
References: <1186420642.112170.78940@w3g2000hsg.googlegroups.com>	<mailman.1683.1186421435.22759.python-list@python.org>	<1186422680.103021.105230@l70g2000hse.googlegroups.com>
	<5hp6d1F3kl28iU4@mid.uni-berlin.de>
Message-ID: <f9897m$i8l$1@sea.gmane.org>

Marc 'BlackJack' Rintsch wrote:
> On Mon, 06 Aug 2007 10:51:20 -0700, Lee Fleming wrote:
> 
>> why isn't the y in def f (x, y = []): something
>> garbage-collected?
> 
> `y` is a name.  Only objects are garbage collected.  There is no `y` in
> that ``def`` in the sense that a local name `y` exists when the ``def`` is
> executed.  The line just says there will be a local name `y` if
> the function `f()` is executed and that local name will be bound to the
> given object.

Unless the user provides a value for the argument in the call.

>                 Which happen to be a list.  This list is referenced by the
> function object, so it won't get garbage collected, and it is bound to a
> local name `y` every time the function is called.  It is always the
> very same list object.  And if you mutate it, this will be visible to
> other calls to the function.
> 
regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From saint.infidel at gmail.com  Fri Aug  3 15:18:42 2007
From: saint.infidel at gmail.com (infidel)
Date: Fri, 03 Aug 2007 12:18:42 -0700
Subject: draggable Tkinter.Text widget
Message-ID: <1186168722.771166.118500@q3g2000prf.googlegroups.com>

Inspired by effbot's recent Vroom! editor, I have been toying with my
own version.  I'd like to make the Text widget "draggable", kind of
like how you can drag a PDF document up and down in Adobe Reader.

Here's what I have so far:

from Tkinter import *

class Draggable(Text, object):

    def __init__(self, parent, **options):
        Text.__init__(self, parent, **options)
        self.config(
            borderwidth=0,
            font="{Lucida Console} 10",
            foreground="green",
            background="black",
            insertbackground="white", # cursor
            selectforeground="green", # selection
            selectbackground="#008000",
            wrap=WORD, # use word wrapping
            undo=True,
            width=80,
        )
        self.bind('<Button-3>', self.handle_mousedown3)
        self.bind('<B3-Motion>', self.handle_drag3)

    def handle_mousedown3(self, event=None):
        self._y = event.y

    def handle_drag3(self, event=None):
        self.yview_scroll(self._y - event.y, UNITS)
        self._y = event.y

if __name__ == '__main__':
    root = Tk()
    root.protocol("WM_DELETE_WINDOW", root.quit)
    root.config(background='black')
    root.wm_state("zoomed")
    text = Draggable(root)
    text.delete(1.0, END)
    text.insert(END, '\n'.join(str(x) for x in xrange(1, 1001)))
    text.pack(fill=Y, expand=True)
    root.mainloop()

This works fine, but because the mouse movements are in pixels and
scroll actions are in lines, the 'magnitude' of the scrolling is much
larger than the mouse movements causing them.  This isn't all bad, it
makes scanning a long document quickly easier, but I was wondering if
there was a simple way to add some "friction" to the scrolling so a
tiny mouse movement doesn't cause the text to go zipping by in a
flash.

Thanks,
infidel



From python-url at phaseit.net  Mon Aug 27 06:36:49 2007
From: python-url at phaseit.net (Gabriel Genellina)
Date: Mon, 27 Aug 2007 10:36:49 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (Aug 27)
Message-ID: <fau9g1$ijf$1@lairds.us>

QOTW:  "There is something to be said for Python's 'elitism' ;)" - Carsten
Haese

"While the discipline of TDD is good and useful, there's a time and place
for unstructured and informal experimentation too." - Steven D'Aprano

    
    Issue tracker migration is complete - now at
        http://bugs.python.org and based on Roundup.
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/7cc2fc8f85b9e5cf/c582a66d35a03e7c
    
    How to properly cleanup resources (don't rely on __del__ for this)
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/6f5784070d7b6b64/fee0c252b4311c1f
    
    How to open a file using its associated application (multi-platform)
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/4913652c4cce31a4/42c670204411f000
    
    For number-crunching lawyers: does shuffle() produce a uniform
    distribution()?
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/48931f2f7ca7b49e/22fa264d9706d2d6
    
    Replacing a method with another depending on the instance.

    Bonus for language lawyers: the difference between functions and
    methods, and how the descriptor protocol works in short.
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/47cec38e789032be/832f0f648e6893a4#a1b7360e83905033
    
    Sometimes -e.g. for benchmarking- one wants to purge the disk cache
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/1273b79934a3e3e9/0b4e52a7bfa4e922
    
    Do some foolish things when creating a class, and you'll need
    a Python guru to understand what really happened
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/4373307ef75d1278/a8610ba4e2f9d9ef
    
    Learning Python using a book based on version 1.5: some people
    say "OK", other say "No"
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/ffcccbdcae177ff/75b819d9c362b4ca
    
    A small trick: how to generate short exception names
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/54c9b0f626b6a8fe/562c3a6eace389fd
    
    A proposal for a new document markup language (a LaTeX competitor)
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/6b72f25206aacf7/7242c98c672a21e6
    
    
========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance.
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".  Write to the same address to unsubscribe.


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From steve at holdenweb.com  Tue Aug 21 07:31:53 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Aug 2007 07:31:53 -0400
Subject: Newbee Question
In-Reply-To: <1187650036.450645.185500@a39g2000hsc.googlegroups.com>
References: <mailman.15.1187620149.26576.python-list@python.org>	<1187621470.484615.7010@i13g2000prf.googlegroups.com>	<mailman.19.1187621934.26576.python-list@python.org>	<1187622390.854759.162320@q3g2000prf.googlegroups.com>
	<1187650036.450645.185500@a39g2000hsc.googlegroups.com>
Message-ID: <46CACD29.8080200@holdenweb.com>

hd1956 at yahoo.com wrote:
[...]
> 
> Thanks for the help. By the way I am trying to learn the python after
> work and on weekends. If it was a dumb question, to this group, I will
> not bother you all again.
> Without help it will take me longer to learn. Thanks
> 
Don't worry about it. There is also a list specifically for learners, 
which you can find out about at

   http://mail.python.org/mailman/listinfo/tutor

Welcome to the Python community!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From gdonald at gmail.com  Thu Aug  2 13:50:05 2007
From: gdonald at gmail.com (Greg Donald)
Date: Thu, 2 Aug 2007 12:50:05 -0500
Subject: Emacs + python
In-Reply-To: <4vasi.139194$wG2.61677@newsfe17.lga>
References: <ak8x8v2udo.fsf@googlemail.com>
	<mailman.1476.1186017909.22759.python-list@python.org>
	<4vasi.139194$wG2.61677@newsfe17.lga>
Message-ID: <15e66e4e0708021050n59d5dcafi58fa80ea946d5bea@mail.gmail.com>

On 8/1/07, hg <hg at nospam.org> wrote:
> Are there any cscope & ECB equivalent for Python ?

ECB is not language specific.  It works the same for browsing Python
code as any other language.


-- 
Greg Donald
http://destiney.com/


From irmen.NOSPAM at xs4all.nl  Fri Aug  3 13:21:40 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 03 Aug 2007 19:21:40 +0200
Subject: (no) fast boolean evaluation ?
In-Reply-To: <1186096979.397596.36640@e16g2000pri.googlegroups.com>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<mailman.1545.1186095368.22759.python-list@python.org>
	<1186096979.397596.36640@e16g2000pri.googlegroups.com>
Message-ID: <46b36424$0$239$e4fe514c@news.xs4all.nl>

John Machin wrote:

> 
> (you_are_confused and/or
> function_returns_bool_but_has__side_effects())
> 

That above expression should be written more explicitly like:

function_result = function_returning_bool_but_with_side_effects()

if you_are_confused or function_result:
   do_something_nice()


--irmen


From john at clocksoft.com  Sun Aug  5 04:37:41 2007
From: john at clocksoft.com (John Pinner)
Date: Sun, 5 Aug 2007 09:37:41 +0100
Subject: [pyconuk] pyweek is happening august 02 - august 09
In-Reply-To: <200708041832.l74IWkRY027388@theraft.openend.se>
References: <200708041832.l74IWkRY027388@theraft.openend.se>
Message-ID: <ff8a32f0708050137n5438ba31k1b7882b52e9dcc7a@mail.gmail.com>

Hello All,

On 04/08/07, Laura Creighton <lac at openend.se> wrote:
> 00:00 UTC 2007-09-02 to 00:00 UTC 2007-09-09 exactly.  See
> www.pyweek.org
>
> PyconUK is happening.  http://www.pyconuk.org/ 8th and 9th September.
>
> This means that those of us who generally do not see each other but are
> going to PyconUK could put together an entry and then sprint together
> on it before PyCon UK.  There would be this terrible torment -- do
> I attend the con or get my game to work -- but it is still the
> best chance some of us have to work together yet.
>
> Talk to me if you are interested in maybe making a PyconUK pygame
> team.  I think that this could be a lot of fun.  Sign up on
> www.pyweek.org if you think so, as well.  But mail me.
>
> John -- assuming we want to meet up _before_ PyConUK -- can that
> work?

Yes, we'd really like to see you at PyCon UK, and the games!

We have sprint facilities available for two days before and two days
after PyCon UK. They are at 95 Broad Street, about ten minutes walk
from the Conference venue. There is a fat pipe internet connection.
There are three rooms available, one has 10 high spec workstations
which can be pre-installed with the o/s of your choice, for the other
rooms you'd need your own laptops. There are places nearby to buy
cheap food (a local supermarket and the usual fast food and sandwich
shops).

> Can you point us at a cheap hostel for a few days?

Looking at http://www.pyconuk.org/accommodation.html :

The budget buys are the Etap (conference hotel) and Birmingham
Backpackers, they are also furthest from the sprint location, say 25
and 30 minutes walk respectively (I haven't timed these). Basically,
you can stay at either of these for less than ?20 if you share.

Also worth considering are the Comfort Zone serviced apartments, the
ones in Townsend Street are about ten minutes walk from the sprint
venue, less to the conference.

The nearest hotel is the Novotel (where we're holding the conference
dinner) at 70 Broad Street, 2 minutes from the sprint and 10 from the
Conference. You should be able to get an online deal for about ?69 for
a double room. Just behind the Novotel is the Premier Travel Inn,
slightly less at say ?65 for a double. There are two Travel Inns in
the area, sprinters would want the Birmingham Broad Street (Brindley
Place) one.

A good compromise between cost and convenience for the sprinters would
be the Travelodge, just across the road from the sprint at 230 Broad
Street, where you can get a family room (sleeps 3 adults plus one
child, 4 adults at a push) for ?66.

One of the PyCon UK delegates has been finding cheap accommodation in
the area, and I'll ask him to contact you directly, Laura.

Best wishes,

John
--


From gagsl-py2 at yahoo.com.ar  Wed Aug 29 00:27:02 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 28 Aug 2007 21:27:02 -0700
Subject: tempfile.mkstemp and os.fdopen
In-Reply-To: <1188350472.508625.18780@50g2000hsm.googlegroups.com>
References: <1188323759.955043.317630@19g2000hsx.googlegroups.com>
	<slrnfd90i1.rol.nick@irishsea.home.craig-wood.com>
	<1188350472.508625.18780@50g2000hsm.googlegroups.com>
Message-ID: <1188361622.967138.91690@57g2000hsv.googlegroups.com>

On 28 ago, 22:21, billiejoex <gne... at gmail.com> wrote:

> Another question: I have to open file for writing ('wb') but I noticed
> that both tempfile.mkstemp() and os.fdopen() accept a "mode" argument.
> It's not clear *when* do I have to specify such mode. When using
> tempfile.mkstemp?
>
> Moreover, what happens if I specify "text" mode when using mkstemp and
> "binary" mode when using fdopen?
>
> PS - I think that tempfile.mkstemp docstring should be enhanced to
> cover such and other questions (e.g. I find reasonable that every user
> using tempfile.mkstemp() should use also os.fdopen() in conjunction
> but this isn't mentioned).

As someone already suggested, why don't you use TemporaryFile or
NamedTemporaryFile and avoid such problems?

--
Gabriel Genellina



From horpner at yahoo.com  Thu Aug  2 15:38:15 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 02 Aug 2007 19:38:15 GMT
Subject: i am new to python-Please somebody help
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com>
	<1186063842.827016.95030@q3g2000prf.googlegroups.com>
	<mailman.1520.1186073909.22759.python-list@python.org>
	<1186081737.357371.232040@i13g2000prf.googlegroups.com>
Message-ID: <slrnfb4bq2.1uc.horpner@FIAD06.norwich.edu>

On 2007-08-02, gregarican <greg.kujawa at gmail.com> wrote:
> On Aug 2, 12:58 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
>> "gregarican" <greg.kuj... at gmail.com> wrote in message
>>
>> news:1186063842.827016.95030 at q3g2000prf.googlegroups.com...
>> | friendly than Python's. Your points are well-taken in how to properly
>> | post and how to do your own homework. Message correct. Delivery
>> | lacking...
>>
>> Sorry, I saw nothing rude in Steven's straightforward and indeed polite
>> suggestion.  Your post, however, ....
>>
>> tjr
>
> Maybe it's just me but the word "grovelling" just doesn't ring
> of newbie friendliness. 

Maybe not, but it seemed to be a reasonable characterisation of
the subject line.

The only thing more valued than politeness on most programming
newsgroups is correctness.

> To each their own I guess. Kind of like the Smalltalk list
> where a few respondents are really dry. Someone will post
> asking something like "Can I use Smalltalk to do X so that it
> talks to Y?" One guy (without pointing to a link or offering a
> snippet) just posts "Yes." I guess literally they have
> contributed. Or someone calls your house and asks, "Is
> so-and-so there?" You just say "Yes" and hang up on them :-)

Those kind of replies are posted for the fun of it, and with the
knowledge that somebody else will feel less flip at the time and
probably provide real help.

-- 
Neil Cerutti
The pastor will preach his farewell message, after which the choir will sing,
"Break Forth Into Joy." --Church Bulletin Blooper


From zentraders at gmail.com  Tue Aug 14 18:41:35 2007
From: zentraders at gmail.com (Zentrader)
Date: Tue, 14 Aug 2007 15:41:35 -0700
Subject: What order does info get returned in by os.listdir()
In-Reply-To: <gemini.jms7ay00fafcf00k8@jernic.by.invalid>
References: <gemini.jms7ay00fafcf00k8@jernic.by.invalid>
Message-ID: <1187131295.984122.47200@q4g2000prc.googlegroups.com>

On Aug 14, 1:52 pm, Jeremy C B Nicoll <jer... at blueyonder.co.uk> wrote:
> What order does info get returned in by os.listdir() ?
>
> I'm just starting to write python code, on an Win XP Pro machine.  I've got
> various directories which, when I look at them in Win XP, sorted by name, I
> see in order, eg:
>
>    ~prefixed file   .txt
>    A.txt
>    B.txt
>    ...
>    Z.txt
>
> ie, XP seems to think that files with a "~" as their first character are
> sorted ahead of A.
>
> When I use os.listdir() to return that list of leaf values, I do seem to get
> them in alphabetical order, A before B before C etc, but the ~-prefixed ones
> are returned after the Z-prefixed files rather than before the A-ones.
>
> I was wondering why...
>
> --
> Jeremy C B Nicoll - my opinions are my own.




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Aug 13 12:10:05 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 13 Aug 2007 18:10:05 +0200
Subject: Help with optimisation
In-Reply-To: <46c06b51$0$11684$7b0f0fd3@mistral.news.newnet.co.uk>
References: <46c06b51$0$11684$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <46c0825d$0$13987$426a74cc@news.free.fr>

special_dragonfly a ?crit :
> Hello,
(snip)
> The function doesn't return anything, but it's called often enough and 
> depending on the optimisation I'll be able to use the same style in other 
> areas of the program.
> 
> previous code:
> def CreatePerson(text_buffer):
>     dom=xml.dom.minidom.parseString(text_buffer)
>     reflist = dom.getElementsByTagName('Country')
>     Country = reflist[0].firstChild.nodeValue
>     reflist = dom.getElementsByTagName('Age')
>     Age = reflist[0].firstChild.nodeValue
>     reflist = dom.getElementsByTagName('Surname')
>     Surname = reflist[0].firstChild.nodeValue
>     reflist = dom.getElementsByTagName('Forename')
>     Forename = reflist[0].firstChild.nodeValue
>     cursor.execute('INSERT INTO Person VALUES(?,?,?)', (Forename + "-" + 
> Surname, Age, Country))
>     connection.commit()
> 
> I've changed it now to this:
> def CreatePerson(text_buffer):
>     dom=xml.dom.minidom.parseString(text_buffer)
>     elements=['Country','Age','Surname','Forename']
>     Values=[]
>     for element in elements:
>         reflist=dom.getElementsByTagName(element)
>         Values.append(reflist[0].firstChild.nodeValue)
>         # I can get away with the above because I know the structure of the 
> XML
>     cursor.execute('INSERT INTO Person 
> VALUES(?,?,?)',(Forename+"-"+Surname,Age,Country))
>     connection.commit()

A common python optimisation trick is to stote local references to save 
on attribute lookup time, ie:

# local ref to parseString
import dom
dom_parseString=xml.dom.minidom.parseString

def CreatePerson(text_buffer):
     dom = dom_parseString(text_buffer)
     elements=['Country','Age','Surname','Forename']
     values=[]
     getElementByTagName = dom.getElementsByTagName
     for element in elements:
         reflist = getElementsByTagName(element)
         values.append(reflist[0].firstChild.nodeValue)


But as Alex already pointed out, you'd be better using (c)ElementTree.

> They both seem ugly IMO (read: longer than intuitively necessary),

I'd say this is a common problem with XML :-/


From pingmaximus at gmail.com  Wed Aug  1 16:10:17 2007
From: pingmaximus at gmail.com (Maximus Decimus)
Date: Wed, 01 Aug 2007 20:10:17 -0000
Subject: Extending Python by Adding Keywords & Data types
In-Reply-To: <1185973687.883520.227540@k79g2000hse.googlegroups.com>
References: <1185913739.879602.212950@w3g2000hsg.googlegroups.com>
	<1185973687.883520.227540@k79g2000hse.googlegroups.com>
Message-ID: <1185999017.188830.88860@d55g2000hsg.googlegroups.com>

On Aug 1, 9:08 am, Paul McGuire <pt... at austin.rr.com> wrote:
> On Jul 31, 3:28 pm, Maximus Decimus <vishak.1... at gmail.com> wrote:
>
>
>
> > I am using python v2.5 and I am an amateur working on python. I am
> > extending python for my research work and would like some help and
> > guidance w.r.t this matter from you experienced python developers.
>
> > II want to add some more KEYWORDS and DATATYPES into the python script
> > apart from the existing ones.
>
> Vishak -
>
> Let me echo the sentiments of the other posters who replied to your
> message.  It is *very* unusual for a new Python user to begin their
> Pythonic journey by modifying the Python interpreter to add new
> keywords and datatypes.  Python is designed to be a very flexible and
> extensible language just as it is.
>
> Since you are familiar with C, your question strikes those of us on
> this group as one who would write "I'm just learning C and I would
> like to modify the core library to add some new functions for my
> research."  And all the readers on comp.lang.c scratch their heads,
> thinking "Huh?  Why doesn't this guy just write the functions in his
> own program, the way the language was designed for him to do in the
> first place?"
>
> Now maybe your research is in the field of language design, and has
> something to do with the relative ease/difficulty of modifying
> computer languages.  Then it would make sense for you to dive right in
> to learning how to modify Python's compiler.
>
> But if your research was in just about any other field (from finite
> elements analysis to genetic programming to genetics to simulations to
> process control to whatever), DON'T start by modifying Python - start
> by LEARNING Python.
>
> When a new datatype is required in a Python program, then the
> programmer writes a class to implement this datatype.  The class
> itself is written in Python, but it can be used just like any built-in
> datatype.  For instance, here is a new datatype I just thought up - a
> Box that can hold up to 'n' objects.
>
> class Box(object):
>     def __init__(self,n):
>         self.capacity = n
>         self.contents = []
>
>     def add(self,other):
>         if len(self.contents) < self.capacity:
>             self.contents.append( other )
>         else:
>             raise ValueError("can't add any more to this Box")
>
>     def __iadd__(self,other):
>         self.add(other)
>         return self
>
> box = Box(3)
>
> # add stuff to the box until it overflows
> while(True):
>     box += object()
>
> Voila!  I created a new datatype, Box, and even added support for it
> to understand how to use the '+=' operator so that adding objects to
> the Box looks like an addition statement.  All without modifying
> Python itself.  (Here's an exercise - extend this example so that the
> Box has a limited capacity in the *weight* of the added objects, as
> well as in the number of objects.)
>
> This is the basic way that one extends Python with their own new
> datatypes and methods.  New keywords are a little rarer, but really,
> start by just adding methods, like the add method above.  Python users
> around the world develop a wide range of applications and programs
> using just these techniques, and never touch the Python compiler
> itself.
>
> And here is a case you'd like to avoid.  Let's say you start by
> learning how to modify Python because you need a general-purpose
> container for things.  You spend two weeks learning how to do this,
> getting your code mostly debugged, and then you post to
> comp.lang.python your proud achievement.  Immediately the replies come
> back, "Congratulations, newbie, you just reinvented the built-in list
> type."  Without LEARNING Python, you wont know what is already
> provided in the language.
>
> So, in general this is a helpful group, and it is possible that you DO
> need to learn how to add datatypes and keywords to Python as your
> first objective.  We're not trying to pry, but give us a bit more
> detail.  Someone might even rough out for you what one of your new
> datatypes might look like.  So pray, tell us what sort of specialized
> datatypes and keywords do you think you need to add, and we'll try to
> point you in one or more directions.
>
> -- Paul

On Aug 1, 9:08 am, Paul McGuire <pt... at austin.rr.com> wrote:
> On Jul 31, 3:28 pm, Maximus Decimus <vishak.1... at gmail.com> wrote:
>
>
>
> > I am using python v2.5 and I am an amateur working on python. I am
> > extending python for my research work and would like some help and
> > guidance w.r.t this matter from you experienced python developers.
>
> > II want to add some more KEYWORDS and DATATYPES into the python script
> > apart from the existing ones.
>
> Vishak -
>
> Let me echo the sentiments of the other posters who replied to your
> message.  It is *very* unusual for a new Python user to begin their
> Pythonic journey by modifying the Python interpreter to add new
> keywords and datatypes.  Python is designed to be a very flexible and
> extensible language just as it is.
>
> Since you are familiar with C, your question strikes those of us on
> this group as one who would write "I'm just learning C and I would
> like to modify the core library to add some new functions for my
> research."  And all the readers on comp.lang.c scratch their heads,
> thinking "Huh?  Why doesn't this guy just write the functions in his
> own program, the way the language was designed for him to do in the
> first place?"
>
> Now maybe your research is in the field of language design, and has
> something to do with the relative ease/difficulty of modifying
> computer languages.  Then it would make sense for you to dive right in
> to learning how to modify Python's compiler.
>
> But if your research was in just about any other field (from finite
> elements analysis to genetic programming to genetics to simulations to
> process control to whatever), DON'T start by modifying Python - start
> by LEARNING Python.
>
> When a new datatype is required in a Python program, then the
> programmer writes a class to implement this datatype.  The class
> itself is written in Python, but it can be used just like any built-in
> datatype.  For instance, here is a new datatype I just thought up - a
> Box that can hold up to 'n' objects.
>
> class Box(object):
>     def __init__(self,n):
>         self.capacity = n
>         self.contents = []
>
>     def add(self,other):
>         if len(self.contents) < self.capacity:
>             self.contents.append( other )
>         else:
>             raise ValueError("can't add any more to this Box")
>
>     def __iadd__(self,other):
>         self.add(other)
>         return self
>
> box = Box(3)
>
> # add stuff to the box until it overflows
> while(True):
>     box += object()
>
> Voila!  I created a new datatype, Box, and even added support for it
> to understand how to use the '+=' operator so that adding objects to
> the Box looks like an addition statement.  All without modifying
> Python itself.  (Here's an exercise - extend this example so that the
> Box has a limited capacity in the *weight* of the added objects, as
> well as in the number of objects.)
>
> This is the basic way that one extends Python with their own new
> datatypes and methods.  New keywords are a little rarer, but really,
> start by just adding methods, like the add method above.  Python users
> around the world develop a wide range of applications and programs
> using just these techniques, and never touch the Python compiler
> itself.
>
> And here is a case you'd like to avoid.  Let's say you start by
> learning how to modify Python because you need a general-purpose
> container for things.  You spend two weeks learning how to do this,
> getting your code mostly debugged, and then you post to
> comp.lang.python your proud achievement.  Immediately the replies come
> back, "Congratulations, newbie, you just reinvented the built-in list
> type."  Without LEARNING Python, you wont know what is already
> provided in the language.
>
> So, in general this is a helpful group, and it is possible that you DO
> need to learn how to add datatypes and keywords to Python as your
> first objective.  We're not trying to pry, but give us a bit more
> detail.  Someone might even rough out for you what one of your new
> datatypes might look like.  So pray, tell us what sort of specialized
> datatypes and keywords do you think you need to add, and we'll try to
> point you in one or more directions.
>
> -- Paul


Firstly to Paul, I clearly got your reply and I am working hard to
know more about python by going through the tutorials. I did start
with the doc tutorial available along with the package. I have done
the basic learning of python which is way simple compared to the
stuffs you are talking about. I have just jumped into the extending
python part of the document. I think I need to master that portion.
Your code snippet was quite simple and it explained me very well than
the tutorial. HAts off to u!!

Bjorn, Marc, Ben, I also noted your comments and I am working on them.
I have gone through the Python Classes portion and I need to workout
quite a lot excercises to make myself familiar with Python. I am gonna
start doing that right away.

Coming to the complete explanation of what I am upto:

I am doing my research in Pervasive space environments filled with
sensors and actuators. I am just trying to modify an existing language
which suits that kind of environment. Pervasive space environment is
filled with sensors and actuators and everything depends on their
state and behavior ie on the sensor readings and actuator states. So
why not express a language variable in terms of sensors and actuators?
THis is my idea of working around and trying to introduce new data
types for these sensor and actuator variables which store sensor
readings and actuator states.

I think this explains a bit clearly on what I am looking
for..Suggestion and ideas are kindly appreciated.

Thanks in advance and for your time.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Aug 13 16:12:25 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 13 Aug 2007 22:12:25 +0200
Subject: decorators - more than just syntactic sugar
References: <46be005e$0$13866$ba620e4c@news.skynet.be>
	<mailman.1910.1187003498.22759.python-list@python.org>
Message-ID: <5ibs99F3nq29uU1@mid.individual.net>

BJ?rn Lindqvist wrote:

> unpedagogically not separated from ordinary functions.

Decorators _are_ ordinary functions. Remember the "syntactic sugar"
in this thread?

Regards,


Bj?rn

-- 
BOFH excuse #338:

old inkjet cartridges emanate barium-based fumes



From aahz at pythoncraft.com  Sat Aug 11 17:25:29 2007
From: aahz at pythoncraft.com (Aahz)
Date: 11 Aug 2007 14:25:29 -0700
Subject: Augmented assignment (was Re: Something in the function tutorial
	confused me.)
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<m3hvi.37606$G23.6240@newsreading01.news.tds.net>
	<f9kdpq$drp$1@panix3.panix.com> <Xns99896DB601AF1OKB@199.45.49.11>
Message-ID: <f9l9g9$h46$1@panix3.panix.com>

In article <Xns99896DB601AF1OKB at 199.45.49.11>,
OKB (not okblacke) <brenNOSPAMbarn at NObrenSPAMbarn.net> wrote:
>
>    	This sentence is phrased as though it is the whole story, but it 
>isn't, because the operation might not in fact wind up being an 
>assignment.  Shouldn't there be an "except see below" or something 
>there, to alert the reader that in some cases a true assignment doesn't 
>occur?  (I realize that the exception follows quite closely on the heels 
>of this sentence, but it doesn't follow immediately, and is separated by 
>a paragraph break and intervening material about the parallel to 
>unaugmented x = x + 1.  On initial reading my tendency is to read the 
>end of the sentence quoted above, see a paragraph break and apparently 
>explanatory material, and go "oh, okay, I now have the full 
>specification of this syntax" when in fact I don't.)

That's a good idea -- doc patches are always welcome!
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"And if that makes me an elitist...I couldn't be happier."  --JMS


From daniels at dsl-only.net  Fri Aug 17 09:09:29 2007
From: daniels at dsl-only.net (Scott David Daniels)
Date: Fri, 17 Aug 2007 06:09:29 -0700
Subject: clarification
In-Reply-To: <fa41k8$10n$1@news2.u-psud.fr>
References: <aa405c1f0708162332t7b6dbdd6o2cc0f512dc821d7b@mail.gmail.com>
	<mailman.2107.1187350363.22759.python-list@python.org>
	<fa41k8$10n$1@news2.u-psud.fr>
Message-ID: <13cb7frnqs8f6d9@corp.supernews.com>

Laurent Pointal wrote:
> Thomas Jollans a ?crit :
>> On Friday 17 August 2007, Beema shafreen wrote:
>>> hi everybody,
>>> i have a file with data separated by tab
>>> mydata:
>>> fhl1    fkh2
> <zip>
>>> shows these two are separated by tab represented as columns
>>> i have to check the common data between these two coloumn1 an coloumn2
>>> my code:
>>> data = []
>>> data1 = []
>>> result = []
>>> fh = open('sheet1','r')
>>> for line in fh.readlines():
>>>         splitted = line.strip().split('\t')
>>>         data.append(splitted[0])
>>>         data1.append(splitted[1])
>>>         for k in data:
>>>                 if k in data1:
>>>                         result.append(k)
>>>                         print result
>>> fh.close()
> 
> Use set data type for data and data1 (you fill them with an algo like th 
> one you wrote - just use add() in place of appen()) then use set 
> intersection to get common data.
> 
> See doc for set data type:
> http://docs.python.org/lib/types-set.html
> 
> Would look like (not tested):
> data = set()
> data1 = set()
> fh = open('sheet1','r')
> for line in fh.readlines():
>     splitted = line.strip().split('\t')
>     data.add(splitted[0])
>     data1.add(splitted[1])
> 
> result = data.intersection(data1)

   lefts = set()
   rights = set()
   with open('sheet1', 'r') as fh:
       for line in fh:
           trimmed = line.strip()
           if trimmed: # Skip blanks (file end often looks like that)
               left, right = line.strip().split('\t')
               lefts.add(left)
               rights.add(right)
   result = lefts & rights

-Scott


From python at jayloden.com  Mon Aug 27 13:20:37 2007
From: python at jayloden.com (Jay Loden)
Date: Mon, 27 Aug 2007 13:20:37 -0400
Subject: Python error on Mac
In-Reply-To: <46D0EC54.8030806@gmail.com>
References: <46D0EC54.8030806@gmail.com>
Message-ID: <46D307E5.2010706@jayloden.com>

Clover wrote:
> When trying to do some things on my Mac (starting Lyx, compiling Latex 
> via TextMate) I get this error:
> 
> python: execv: 
> /Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/Contents/MacOS/Python: 
> No such file or directory
> 
> I (and people on Lyx and TextMate lists) are at a complete loss as to 
> why this is happening. I didn't (at least intentionally) fiddle with 
> Python setup.
> 
> Thanks!

what is the output of 'which python' - this should show what python executable is running: 

[jloden at macbook jloden]$ which python
/Library/Frameworks/Python.framework/Versions/Current/bin/python

You should then check the output of ls -l agains the value of the above: 

[jloden at macbook jloden]$ ls -l /Library/Frameworks/Python.framework/Versions/Current/bin/python
lrwxr-xr-x   1 root  admin  9 Jul 14 01:53 /Library/Frameworks/Python.framework/Versions/Current/bin/python -> python2.5

That will show what the executable is actually linked to. 

Other thoughts would be to check if the /Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/Contents/MacOS/Python directory exists, or even if /Library/Frameworks/Python.framework/Versions/2.5/ exists. Perhaps you are trying to execute Python 2.5 but don't actually have it installed? 

-Jay


From aleax at mac.com  Wed Aug  1 11:04:56 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 1 Aug 2007 08:04:56 -0700
Subject: Where do they tech Python officialy ?
References: <1185209574.045112.163780@g4g2000hsf.googlegroups.com>
	<7xveca4ajp.fsf@ruckus.brouhaha.com>
	<1185265091.276958.239910@r34g2000hsd.googlegroups.com>
	<1i23wyk.avc945i4dwsiN%aleax@mac.com>
	<1185951027.061072.188280@g4g2000hsf.googlegroups.com>
Message-ID: <1i25pbm.7op8wk21hjzwN%aleax@mac.com>

NicolasG <nicolasg at gmail.com> wrote:

> > Open source projects do not require previous professional experience to
> > accept volunteers.  So, one way out of your dilemma is to make a name
> > for yourself as an open source contributor -- help out with Python
> > itself and/or with any of the many open source projects that use Python,
> > and you will both learn a lot _and_ acquire "professional experience"
> > that any enlightened employer will recognize as such.  That will take a
> > while, but not as long as getting a college degree (and it will be far
> > cheaper than the degree).
> >
> > Alex
> 
> I think this is the best idea to escape the python amateur circle and
> go in to open source project that are considered to be professional
> projects. I don't know if it will be better to find a project to
> contribute or to start a new one .. Will have a look around and think
> about.

Unless you have some specific new idea that you're keen to address and
can't be met by existing projects, joining an existing project would
normally be a better bet.  One-person projects are rarely as important
as larger ones, and it's quite hard to get other collaborators to a new
project; working in a project with existing code and contributors will
also be more instructive.  As for which OS projects are "considered to
be professional", just about all large successful ones are so
considered: after all, even games, say, are "professional projects" from
the POV of firms that develop and sell them, such as EA!-)


Alex


From neptundancer at gmail.com  Sun Aug 26 12:49:53 2007
From: neptundancer at gmail.com (neptundancer at gmail.com)
Date: Sun, 26 Aug 2007 16:49:53 -0000
Subject: lisper learning python,
	... could you please comment my first python program?
In-Reply-To: <13d3aot56lq4l58@corp.supernews.com>
References: <1188143768.742884.38520@r29g2000hsg.googlegroups.com>
	<13d3aot56lq4l58@corp.supernews.com>
Message-ID: <1188146993.825966.189520@50g2000hsm.googlegroups.com>

Thanks a lot for comments! I am going to fix the source according to
your advices ;)

Nep

On Aug 26, 6:32 pm, Steven D'Aprano <st... at REMOVE-
THIScybersource.com.au> wrote:
> On Sun, 26 Aug 2007 15:56:08 +0000, neptundancer wrote:
> > Hi,
> >   to extend my skills, I am learning python. I have written small
> > program which computes math expression like "1+2*sin(y^10)/cos(x*y)" and
> > similar, so far only + - * / ^ sin con tan sqrt are supported. But my
> > program is quite inextensible, I have to change the code to add new
> > functions... Could some fellow experienced pythonista give me some tips
> > how to make my program shorter, and more extensible?
>
> Just a few comments at random. This is certainly not meant to be
> exhaustive:
>
> > def normalize(string):
> >     tmp = "".join([c for c in string if c != " "])
> >     return "(" + tmp + ")"
>
> Try this instead:
>
> def normalize(astring):
>     return "(" + astring.replace(" ", "") + ")"
>
>
>
> > def most_nested_expression(string):
> [snip code]
> >     if level != 0:
> >         raise IOError("mismatched parens")
>
> You raise IOError quite often, but that's a misuse of it. IOError is a
> subclass of EnvironmentError, and is meant to indicate (e.g.) a failed
> read from a disk.
>
> If you execute help(IOError) at the interactive prompt, you will see:
>
> class IOError(EnvironmentError)
>  |  I/O operation failed.
>
> I suggest a better exception to use would be ValueError, or even create
> your own:
>
> class MyCustomError(ValueError):
>     pass
>
> would be a minimal example.
>
> > def is_reduced_expression(string):
> >     for c in string:
> >         if c == "^" or c == "*" or c == "/" or c == "+" or c == "-":
> >             return False
> >     return True
>
> Change that to:
>
> for c in string:
>     if c in "^*/+-": return False
> return True
>
> [snip]
>
> > def add(a, b): return a + b
> > def sub(a, b): return a - b
> > def mul(a, b): return a * b
> > def div(a, b): return a / b
>
> Replace the above four functions with:
>
> from operator import add, sub, mul
> from operator import truediv as div
>
> > def translate_function(fn_str):
> >     if fn_str == "+": return add
> >     elif fn_str == "-": return sub
> >     elif fn_str == "*": return mul
> >     elif fn_str == "/": return div
> >     elif fn_str == "^": return math.pow
> >     elif fn_str == "sin": return math.sin elif fn_str == "cos": return
> >     math.cos elif fn_str == "tan": return math.tan elif fn_str ==
> >     "sqrt": return math.sqrt else: raise IOError("unknown function %s" %
> >     fn_str)
>
> fn_map = {"+": add, "-": sub, "*": mul, "/": div,
>     "^": math.pow, "sin": math.sin } # etc.
>
> def translate_function(fn_str):
>     try:
>         return fn_map[fn_str]
>     except KeyError:
>         raise ValueError("unknown function '%s'" % fn_str)
>
> Hope that helps.
>
> --
> Steven.




From horpner at yahoo.com  Mon Aug  6 14:04:12 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 06 Aug 2007 18:04:12 GMT
Subject: Something in the function tutorial confused me.
References: <1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<mailman.1683.1186421435.22759.python-list@python.org>
	<1186422680.103021.105230@l70g2000hse.googlegroups.com>
Message-ID: <slrnfbeoqk.1qk.horpner@FIAD06.norwich.edu>

On 2007-08-06, Lee Fleming <countblabula at yahoo.com> wrote:
> On Aug 6, 12:30 pm, "Hamilton, William " <wham... at entergy.com> wrote:
>> When you call f(23), the variable y within it gets created and points at
>> None.  When f(23) exits, the y that it created gets destroyed.  (Well,
>> goes out of scope, but even if it's not garbage collected it won't ever
>> come back into scope.)  When you then call f(24), a new y is created
>> that also points to None, and disappears forever when f(24) exits.
>>
>> The values in a def statement are created when the def is executed, but
>> the variables are only created when the function is actually called, and
>> new ones are created every time the function is called.
>>
>> --
>> -Bill Hamilton- Hide quoted text -
>>
>> - Show quoted text -
>
> why isn't the y in def f (x, y = []): something
> garbage-collected?

Because the result of evaluating [] is stored somewhere in f as a
default argument. The result of evaluating [] is a new empty
list. It will never be garbage collected, because f maintains a
reference to it. Note that while [] and None may appear to be
similar expressions, they are not. None evaluated to itself,
while [] evaluates to a new empty list.

>>> None is None
True
>>> [] is []
False

-- 
Neil Cerutti
8 new choir robes are currently needed, due to the addition of several new
members and to the deterioration of some of the older ones. --Church Bulletin
Blooper


From semanticist at gmail.com  Fri Aug 31 11:33:03 2007
From: semanticist at gmail.com (Miles)
Date: Fri, 31 Aug 2007 11:33:03 -0400
Subject: fcntl problems
In-Reply-To: <1188573280.155018.109360@o80g2000hse.googlegroups.com>
References: <1188512377.441241.107900@q4g2000prc.googlegroups.com>
	<1188515889.352267.220790@q5g2000prf.googlegroups.com>
	<mailman.186.1188541398.28954.python-list@python.org>
	<1188568022.988154.188230@y42g2000hsy.googlegroups.com>
	<mailman.200.1188571375.28954.python-list@python.org>
	<1188573280.155018.109360@o80g2000hse.googlegroups.com>
Message-ID: <a49e45f50708310833jd160e8dw11b3455e18c75463@mail.gmail.com>

On 8/31/07, mhearne808 wrote:
> Looking at my flock(3) man page, I'm guessing that "35" is the error
> code for EWOULDBLOCK.  Which system header file am I supposed to look
> in to figure that magic number out?

I got the error number by looking at the IOError exception raised when
playing with the interactive interpreter, but I really should have
written:

from errno import EWOULDBLOCK
...
    if e.args[0] == EWOULDBLOCK:
...

- Miles


From mkb at incubus.de  Thu Aug 23 03:38:23 2007
From: mkb at incubus.de (Matthias Buelow)
Date: 23 Aug 2007 07:38:23 GMT
Subject: Xah's Edu Corner: Under the spell of Leibniz's dream
References: <1187567809.896668.228650@z24g2000prh.googlegroups.com>
	<1187598193.118227.270460@19g2000hsx.googlegroups.com>
	<46ca1e65$1_3@news.chariot.net.au>
Message-ID: <5j4rrfF3s3h2rU1@mid.dfncis.de>

In comp.lang.lisp Bikal KC <nepbabucxspamfree at yahoo.ca> wrote:

> I used usenet years ago then stopped for couple of years. I remember
> seeing him/her on c.l.perl I believe doing the same thing he/she is
> doing atm. I'd say the ultimate usenet superstar. Wow!

I think it's some (probably mild) form of autism.
No offense intended, Xah.


From chicorbleak at gmail.com  Tue Aug 21 15:29:46 2007
From: chicorbleak at gmail.com (chicorbleak at gmail.com)
Date: Tue, 21 Aug 2007 19:29:46 -0000
Subject: Partial Blur
Message-ID: <1187724586.607512.227110@m37g2000prh.googlegroups.com>

Hello,

I'm looking for an image manipulation library which would allow me to
blur an oval-shaped part of my picture, instead of the whole thing. I
couldn't find a way to do this using the
tools I see in the API of Python Imaging Library.

If you know how to do this, I'd appreciate it if you left a note.

Thanks
CB



From wolf_tracks at invalid.com  Wed Aug 22 13:28:58 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Wed, 22 Aug 2007 17:28:58 GMT
Subject: What Are These Import/From Statements about?
Message-ID: <un_yi.34471$2v1.24183@newssvr14.news.prodigy.net>

Is there a single source that explains these statements?
------------------------------
from Tkinter import *
from Numeric import *
import Image
import ImageChops
import ImageTk
import time
import binascii
import tkMessageBox
import tkSimpleDialog

from tkFileDialog import asksaveasfilename
from tkFileDialog import askopenfilename

import MakeQTE

import socket
import struct
import glob
import bisect
import os, os.path
import datetime

from os.path import basename, splitext
---------------------------------------------

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From mfglinux at gmail.com  Wed Aug 15 13:42:02 2007
From: mfglinux at gmail.com (mfglinux)
Date: Wed, 15 Aug 2007 10:42:02 -0700
Subject: "Variable variable name" or "variable lvalue"
Message-ID: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>

Hello to everybody

I would like to know how to declare in python a "variable name" that
it is in turn a variable
In bash shell I would wrote sthg like:

for x in `seq 1 3`
do
  M$i=Material(x)  #Material is a python class
done

Why I need this? Cause I have a python module that obliges me to build
a variable called Period, which should have a variable name of
summands (depends on the value of x)

#Let's say x=3, then Period definition is
Period=Slab(Material1(12.5)+Material2(25)+Material3(12.5)) #Slab is a
python class

I dont know how to automatize last piece of code for any x

thank you

Marcos



From python at jayloden.com  Thu Aug  9 12:17:02 2007
From: python at jayloden.com (Jay Loden)
Date: Thu, 09 Aug 2007 12:17:02 -0400
Subject: Issues of state
In-Reply-To: <f9f9mr$cch$1@sea.gmane.org>
References: <op.tv98rva4wepdt4@ericb.pragmadev>	<7x8x8mpn37.fsf@ruckus.brouhaha.com>	<hblpo4-mgj.ln1@lairds.us>	<7xfy2t8l5n.fsf@ruckus.brouhaha.com>	<5uhro4-st8.ln1@lairds.us>
	<f9f9mr$cch$1@sea.gmane.org>
Message-ID: <46BB3DFE.5030504@jayloden.com>

Steve Holden wrote:
> As far as I'm concerned the major issue with trying to have "desktop web 
> apps" compete with true windowed applications is the difficulty of 
> maintaining sensible interactions with the interface. AJAX designs have 
> increased the interaction level at the expense of greater complexity - 
> there is more state to be transferred, and a much higher interaction 
> rate with the server. But the browser is a terrible front-end for AJAX 
> designs because it doesn't record the state changes that take place as a 
> result of requests for updated InnerHTML content, so if the user is 
> unwise enough to press the "back" button she loses all traces of the 
> non-page interactions that have taken place since the page was loaded.
> 
> So "desktop web apps" should ensure that they get displayed in browser 
> windows with minimal user interface decoration. But even then there's 
> always that chance that sophisticated users will use keyboard shortcuts 
> like ALT-left-arrow.
> 
> That, in summary, is why my 2004 PyCon paper[1] was subtitled "The Back 
> Button is Not Your Friend".
> 
> regards
>   Steve
> 
> [1]: http://www.python.org/pycon/dc2004/papers/18/Setting_A_Context.pdf

There's been some interesting work done in that area as well:

http://dev2dev.bea.com/pub/a/2006/01/ajax-back-button.html
http://www.isolani.co.uk/blog/javascript/FixingTheBackButtonThatAjaxBroke

In particular, the RSH (Really Simple History) Framework is an open source
solution to the problem:

http://www.onjava.com/pub/a/onjava/2005/10/26/ajax-handling-bookmarks-and-back-button.html

Like most things involving dynamic client side-javascript code and AJAX
technology, it's a lot harder than you'd like it to be to solve the problem, but
in cases where the Back button is really an issue, it's worth the effort.

-Jay


From evan at yelp.com  Sat Aug 18 01:19:06 2007
From: evan at yelp.com (Evan Klitzke)
Date: Fri, 17 Aug 2007 22:19:06 -0700
Subject: using super() to call two parent classes __init__() method
In-Reply-To: <1187328619.039289.244900@g4g2000hsf.googlegroups.com>
References: <1187328619.039289.244900@g4g2000hsf.googlegroups.com>
Message-ID: <cfb58d850708172219p62529bb0u37f5775b7615cc7d@mail.gmail.com>

On 8/16/07, 7stud <bbxx789_05ss at yahoo.com> wrote:
> When I run the following code and call super() in the Base class's
> __init__ () method,  only one Parent's __init__() method is called.

As the other posters have mentioned, each class needs to make a call
to super. This is because the super call doesn't really call the
parent class' method, it actually calls the next method in the MRO.
The MRO in this case will be Base -> Parent1 -> Parent2 -> object. You
can read the details of Python's MRO here
http://www.python.org/download/releases/2.3/mro/

-- 
Evan Klitzke <evan at yelp.com>


From bronger at physik.rwth-aachen.de  Fri Aug 24 02:45:41 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 24 Aug 2007 08:45:41 +0200
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com> <87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com>
Message-ID: <87tzqp77my.fsf@wilson.homeunix.com>

Hall?chen!

Aahz writes:

> Torsten Bronger  <bronger at physik.rwth-aachen.de> wrote:
>
>> Aahz writes:
>>
>>> Torsten Bronger  <bronger at physik.rwth-aachen.de> wrote:
>>>
>>>> Some LaTeX users in Aachen thought about a general-use markup
>>>> language this spring.  I wrote some code and a rough project
>>>> description, however, we could need some help.
>>>
>>> [...]
>
> My point is that docutils already exists; given the combined
> competition from LaTeX and docutils and OpenOffice, you should
> probably explain what differentiates your project and why people
> should support your project instead of (or in addition to) others.

reStructuredText, AsciiDoc, and some others focus on source code
documentation, or on software documentation.  In contrast to that,
our markup should be suitable for PhD theses, papers and the like.
Thus, it has weaker means for code snippets, RFC citation etc, but
rich syntax for bibliographic entries, index entries, math, and
floating figures.  Additionally, input methods simplify using
characters like ?, ?, or ?.

The differences to LaTeX are explained comprehensively on the
webpage, and actually LaTeX is the real competitor rather than
reStructuredText.  OOo isn't a plain text format, and has no strong
semantic markup.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From bj_666 at gmx.net  Tue Aug  7 13:49:42 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Aug 2007 17:49:42 GMT
Subject: re.sub does not replace all occurences
References: <1186507704.440408.20630@57g2000hsv.googlegroups.com>
Message-ID: <5hrplmF3ldifeU7@mid.uni-berlin.de>

On Tue, 07 Aug 2007 10:28:24 -0700, Christoph Krammer wrote:

> Hello everybody,
> 
> I wanted to use re.sub to strip all HTML tags out of a given string. I
> learned that there are better ways to do this without the re module,
> but I would like to know why my code is not working. I use the
> following:
> 
> def stripHtml(source):
>   source = re.sub("[\n\r\f]", " ", source)
>   source = re.sub("<.*?>", "", source, re.S | re.I | re.M)
>   source = re.sub("&(#[0-9]{1,3}|[a-z]{3,6});", "", source, re.I)
>   return source
> 
> But the result still has some tags in it. When I call the second line
> multiple times, all tags disappear, but since HTML tags cannot be
> overlapping, I do not understand this behavior. There is even a
> difference when I omit the re.I (IGNORECASE) option. Without this
> option, some tags containing only capital letters (like </FONT>) were
> kept in the string when doing one processing run but removed when
> doing multiple runs.

Can you give some example HTML where it fails?

Ciao,
	Marc 'BlackJack' Rintsch


From ajmacd at ns.sympatico.ca  Mon Aug 13 09:50:22 2007
From: ajmacd at ns.sympatico.ca (Aaron J. M.)
Date: Mon, 13 Aug 2007 06:50:22 -0700
Subject: Pausing and Unpausing Threads
In-Reply-To: <mailman.1903.1186983110.22759.python-list@python.org>
References: <1186883176.319755.304970@d55g2000hsg.googlegroups.com>
	<13bulsklq359q8f@corp.supernews.com>
	<1186950645.886995.56060@w3g2000hsg.googlegroups.com>
	<1186965947.914607.222260@o61g2000hsh.googlegroups.com>
	<mailman.1903.1186983110.22759.python-list@python.org>
Message-ID: <1187013022.310789.139750@b79g2000hse.googlegroups.com>

On Aug 13, 2:31 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> Use the same Queue; put a special kind of Action, or just a None object,
> to tell the thread that there are no more things to process.
>  From the main thread, you can join() the others, waiting for them to
> finish.

Ah, thank you very much. :)

- Aaron J. M.



From sbellon at sbellon.de  Fri Aug  3 04:31:03 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Fri, 3 Aug 2007 10:31:03 +0200
Subject: replacement for execfile
References: <mailman.1286.1185635892.22759.python-list@python.org>
	<pan.2007.07.29.03.39.34.703168@REMOVE.THIS.cybersource.com.au>
Message-ID: <20070803103103.7820a34e@cube.tz.axivion.com>

On Sun, 29 Jul, Steven D'Aprano wrote:

> (1) Don't use eval, exec or execfile.

Ok, then I would really like to ask a question about how to solve my
problem without execfile ... ;-)

I am embedding Python on Windows using MinGW. In order to execute a
Python script file, calling any of the PyRun_File functions does not
work but crashes (I assume this is because the Python DLL was built
using Microsoft tools and those tools and MinGW have different FILE
structures, so a FILE *fp cannot be passed from my MinGW C code to
the Python DLL).

Therefore my current solution is to call PyRun_String functions and
execute a string with the content "execfile('filename')".

Is there a way to solve this problem with PyRun_File?

-- 
Stefan Bellon


From wooshi at gmail.com  Sun Aug 26 04:20:35 2007
From: wooshi at gmail.com (shi wu)
Date: Sun, 26 Aug 2007 16:20:35 +0800
Subject: A online python decompiler
Message-ID: <d026ba6e0708260120x4597fa2anaacb0a9b1092b162@mail.gmail.com>

depython [http://www.depython.net depython online service] could decompile
python bytecodes. Depython  online service supports Python versions
from 2.4up to
2.5.You can freely test its function online.
-------------- next part --------------
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From byte8bits at gmail.com  Wed Aug  8 09:55:58 2007
From: byte8bits at gmail.com (brad)
Date: Wed, 08 Aug 2007 09:55:58 -0400
Subject: This bit of code hangs Python Indefinitely
In-Reply-To: <mailman.1738.1186581012.22759.python-list@python.org>
References: <f9ch45$ku$1@solaris.cc.vt.edu>
	<mailman.1738.1186581012.22759.python-list@python.org>
Message-ID: <f9ci4a$1t3$1@solaris.cc.vt.edu>

Chris Mellon wrote:

> ... the producer is designed to block if
> the queue is full. You can use the put_nowait method to have it raise
> an exception instead of blocking.

I assumed that the behavior would have been the other way around. I 
should not have made that assumption.


From aleax at mac.com  Wed Aug 29 10:44:56 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 29 Aug 2007 07:44:56 -0700
Subject: What's the difference ?
References: <1188394767.333396.129020@r29g2000hsg.googlegroups.com>
Message-ID: <1i3ljrn.nrie0r1227d9jN%aleax@mac.com>

Alex <alexandre.badez at gmail.com> wrote:

> Hye,
> 
> I was just wondering what is the difference between
> 
> >> if my_key in mydict:
> >>     ...
> 
> and
> 
> >> if mydict.has_keys(my_key):

Mis-spelled (no final s in the method name).

> >>     ...
> 
> I've search a bit in the python documentation, and the only things I
> found was that they are "equivalent".

Semantically they are, but `in' is faster, more concise, & readable.


> But in this (quiet old) sample ( "http://aspn.activestate.com/ASPN/
> Cookbook/Python/Recipe/59875" ), there is difference between the two
> notation.

What that example is pointing to as "wrong way" is a NON-equivalent
approach that's extremely slow:
  if my_key in mydict.keys():

The call to keys() takes time and memory to build a list of all keys,
after which the ``in'' operator, having a list as the RHS operand, is
also quite slow (O(N), vs O(1)!).  So, never use that useless and silly
call to keys() in this context!


Alex


From steve at holdenweb.com  Fri Aug 31 12:14:40 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 12:14:40 -0400
Subject: Setting a read-only attribute
In-Reply-To: <1188574216.529447.140390@i38g2000prf.googlegroups.com>
References: <1188509700.915517.178440@z24g2000prh.googlegroups.com>	<1188548061.663133.273160@q5g2000prf.googlegroups.com>
	<1188574216.529447.140390@i38g2000prf.googlegroups.com>
Message-ID: <fb9epk$vdg$1@sea.gmane.org>

tleeuwenburg at gmail.com wrote:
> On Aug 31, 6:14 pm, Alexandre Badez <alexandre.ba... at gmail.com> wrote:
>> On Aug 30, 11:35 pm, "tleeuwenb... at gmail.com" <tleeuwenb... at gmail.com>
>> wrote:
>>
>>> I have an object and wish to set an attribute on it which,
>>> unfortunately for me, is read-only.
>>> How can I go about this?
>>> Cheers.
>>> -T
>> Could you show the object you want to set his attribute?
>> Until that, it's difficult to answer to you.
>>
>> PS: If the attribut is on read only, their must a good reason for
>> that ;)
> 
> Hi all,
> 
> Thanks for all the responses. What I'm trying to do is kludge around
> something. sys.settrace takes a method whose arguments are (frame,
> event, arg). I want to have a tracer class which can be instantiated
> and listen in on these trace calls.
> 
> Another way to go about it *might* be to have a module-level list of
> registered Tracer objects which a module-level trace method informs of
> events. It would probably be easier. In fact, I'll go do that.
> 
> *That said*, I still think it makes sense to be able to have objects
> register with sys.settrace.
> 
> So what I did then was declare a static method with the same pattern
> expected by sys.settrace. I then want to use something like __dict__
> or __setattr__ to give that method a reference to the owning object.
> And this is what I'm trying to do -- declare a static method, then "un-
> static it" by adding a reference to the callable object...
> 
> Here's some code:
> ------------------------------------------------------------
> 
> import sys
> 
> 
> class Tracer:
>     '''
>     Instantiate this in order to access program trace information.
> 
>     '''
> 
>     def _getcallback(self):
> 
>         @staticmethod
>         def callback(frame, event, arg):
>             print "tracing ...", tracerReference
>             #print "line ", frame.f_lineno, frame.f_locals
> 
>         return callback
> 
>     def startTrace(self):
>         callback = self._getcallback()
>         callback.__dict__['tracerReference'] = self
>         sys.settrace(callback)
> 
> 
> def foo(dict):
>     for i in range(2):
>         pass
> 
> if __name__ == "__main__":
>     t = Tracer()
>     t.startTrace()
>     foo({1 : 5})
> 
Surely the thing to do, if I understand you, is to declare callback as a 
standard method and then pass a reference to a bound method (the most 
obvious candidate being self.callback) to sys.settrace().

sholden at bigboy ~/Projects/Python
$ cat test05.py
import sys


class Tracer:
     '''
     Instantiate this in order to access program trace information.

     '''


     def callback(self, frame, event, arg):
         print "tracing ...", self
         print "line ", frame.f_lineno, frame.f_locals

     def startTrace(self):
         sys.settrace(self.callback)


def foo(dict):
     for i in range(2):
         pass

if __name__ == "__main__":
     t = Tracer()
     t.startTrace()
     foo({1 : 5})

sholden at bigboy ~/Projects/Python
$ python test05.py
tracing ... <__main__.Tracer instance at 0x7ff2514c>
line  19 {'dict': {1: 5}}

sholden at bigboy ~/Projects/Python
$

Does this do what you want?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From greg.kujawa at gmail.com  Fri Aug  3 11:00:59 2007
From: greg.kujawa at gmail.com (gregarican)
Date: Fri, 03 Aug 2007 15:00:59 -0000
Subject: Eclipse/PyDev question.
In-Reply-To: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>
References: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>
Message-ID: <1186153259.372809.230110@d30g2000prg.googlegroups.com>

On Aug 3, 10:58 am, king kikapu <aboudou... at panafonet.gr> wrote:
> Hi,
> this is actually a question to those of us who use Eclipse and Pydev
> as their main Python developing environment. As i use Eclipse (3.3
> Europa) only for Python and i have nothing to do with Java, is there a
> way to disable/uninstall some Java-specific stuff and make the
> environment actually more snappy ??
>
> thanks for any help

I've used Eclipse for Java, Python, and Ruby development and can say
that AFAIK "Eclipse" and "snappy" are contradictions. Like "jumbo"
"shrimp" :-/



From sbassi at clubdelarazon.org  Mon Aug 27 19:04:03 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Mon, 27 Aug 2007 20:04:03 -0300
Subject: Biased random?
In-Reply-To: <46D34ECF.8060106@sdf.lonestar.org>
References: <favd0c$fcu$1@ss408.t-com.hr>
	<favgh4$1gm3$1@grapevine.csail.mit.edu>
	<13d6i72s8b2a3ad@corp.supernews.com>
	<46D34ECF.8060106@sdf.lonestar.org>
Message-ID: <9e2f512b0708271604r8628f52pa576334579b42b43@mail.gmail.com>

On 8/27/07, J. Cliff Dyer <jcd at sdf.lonestar.org> wrote:
>  Play with your log to get the range you want

Here you can get "true" random numbers (not pseudorandom, they claim
to use a quatum generaton (?)) by fetching them from:
http://random.irb.hr/
They give you a python class t insert into your code, but you need to
register to use it (free).
I am not affiliated to them in any way, I just used it once to play
with it and it worked.
Best,

-- 
Sebasti?n Bassi (???????)
Diplomado en Ciencia y Tecnolog?a.
GPG Fingerprint: 9470 0980 620D ABFC BE63 A4A4 A3DE C97D 8422 D43D

From __peter__ at web.de  Fri Aug  3 04:27:14 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 03 Aug 2007 10:27:14 +0200
Subject: Bug in execfile?
References: <mailman.1528.1186079586.22759.python-list@python.org>
Message-ID: <f8uot2$6tr$03$1@news.t-online.com>

Fernando Perez wrote:

> I'm finding the following behavior truly puzzling, but before I post a bug
> report on the site, I'd rather be corrected if I'm just missing somethin
> obvious.
> 
> Consider the following trivial script:
> 
> from math import sin, pi
> wav = lambda k,x: sin(2*pi*k*x)
> print wav(1,0.25)

> The above runs just fine from a prompt, or even interactively via
> execfile(). Now, consider calling it by using this instead:
> 
> #!/usr/bin/env python
> def runscript(fname):
>     """Run a file by calling execfile()."""
>     execfile(fname)
> runscript('execfilebugscript.py')

> If I run the above, calling the first script 'execfilebugscript.py' and
> the second 'execfilebug.py', I get this:

> NameError: global name 'sin' is not defined

> I'm really, really puzzled by this.  From reading the execfile() docs, I
> had the hunch to change the call to:
> 
>     execfile(fname,{})
> 
> and now the problem disappears, so I can keep on working.


If you execfile() a script names not known in the context of a function are
looked up in the global namespace, but assignments set names in the local
namespace.

Consider execfile(filename) for a file

x = 42
def f():
    print x
f()

x and f are put into the local namespace, but x is not local to the function
f and therefore looked up in f's globals.

Now if you call execfile() in the global namespace of the client script the
global and local namespace are identical

>>> globals() is locals()
True

so x although put into the local namespace will still be found when looked
up in the global namespace. That is the same situation as in your
workaround execfile(filename, {}).

This however is not the case if you call execfile() inside a function. Here
global and local namespace differ.

In your example, when you put another execfile() into the global namespace
of the client script the sin() imported there is the only one that your
wav() function sees. You can verify that by putting

def sin(phi): return "I'm not math.sin()"

instead of 

if 1: .... 

into execfilebug.py.

Can the current behaviour of execfile() be changed into a more intuitive
one? Not with only two namespaces. You'd probably need something similar to
closures, and I don't think the necessary work would be worth the effort.

Peter



From a.schmolck at gmail.com  Fri Aug 17 18:30:34 2007
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: Fri, 17 Aug 2007 23:30:34 +0100
Subject: best GUI library for vector drawing program
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
	<1187366824.140017.285150@z24g2000prh.googlegroups.com>
	<1187373155.876788.25610@e9g2000prf.googlegroups.com>
Message-ID: <yfseji1yet1.fsf@gmail.com>

[x-posts removed]
chewie54 <dfabrizio51 at gmail.com> writes:
> I should have also mentioned that is for a commercial application. That
> doesn't rule Qt or PyQt out, but this is a startup company with very little
> income so my first choice would be to use some GUI library that is free to
> use for commercial apps.

Check out the trolltech webpage: IIRC although it normally costs a few k$, you
can get it much cheaper if you are a startup (you yearly revenue must be lower
than 200k$ or something; this also only works once and maybe up to 2 licenses
or so etc). 

'as


From goldtech at worldpost.com  Wed Aug  1 22:21:53 2007
From: goldtech at worldpost.com (goldtech)
Date: Wed, 01 Aug 2007 19:21:53 -0700
Subject: frequency analysis of a DB column
Message-ID: <1186021313.413443.184060@i38g2000prf.googlegroups.com>

In Python 2.1 are there any tools to take a column from a DB and do a
frequency analysis - a breakdown of the values for this column?

Possibly a histogram or a table saying out of 500 records I have one
hundred and two "301" ninety-eight "212" values and three-hundred
"410"?

Is SQL the way to for this?

Of course there'd be 1000's of values....

I'm not asking about connecting to the DB, just tools to collate and
tally this sort of thing.

Thanks,
Lee G.



From fabioztessitore at libero.it  Fri Aug  3 04:42:45 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 03 Aug 2007 08:42:45 GMT
Subject: Error with Tkinter and tkMessageBox
References: <46af71b7$0$10619$4fafbaef@reader2.news.tin.it>
	<mailman.1481.1186027758.22759.python-list@python.org>
	<46b19caa$0$17951$4fafbaef@reader1.news.tin.it>
	<46b19fe4$0$17952$4fafbaef@reader1.news.tin.it>
	<mailman.1555.1186110566.22759.python-list@python.org>
Message-ID: <46b2ea85$0$36452$4fafbaef@reader5.news.tin.it>

Il Fri, 03 Aug 2007 12:38:09 +1000, John McMonagle ha scritto:

> Fabio Z Tessitore wrote:
>> I've tried to use Twm and SURPRISE! it works!!!
>> 
>> Can you say why? How can I fix the prob with Gnome?
>> 
>> Thanks
> 
> I don't know why it doesn't work correctly on the version of gnome which
> you are running (I run KDE).  Perhaps the question needs to be posed to
> a gnome group ?

Thank you, very much, John.
Best wishes.

Bye


From olsongt at verizon.net  Mon Aug 13 12:01:15 2007
From: olsongt at verizon.net (olsongt at verizon.net)
Date: Mon, 13 Aug 2007 09:01:15 -0700
Subject: ANN: Compyler 0.1
In-Reply-To: <46bf2ea3$0$240$e4fe514c@news.xs4all.nl>
References: <mailman.1859.1186862018.22759.python-list@python.org>
	<46bf2ea3$0$240$e4fe514c@news.xs4all.nl>
Message-ID: <1187020875.575423.58000@o61g2000hsh.googlegroups.com>

> Grant Olson wrote:
> > Compyler is a pre-alpha x86 native code compiler.
>
> In what ways is this similar or different to Shed Skin?http://mark.dufour.googlepages.com/
>
> --Irmen

I've never actually downloaded shedskin, but my understanding is that
it:

  + does type inference for speed, but means you're working with a
subset of python.

  + Generates C++ so you need an intermediate compiler (probably only
an issue on windows)

  + Generates code via the AST.

OTOH, compyler:

  + has the exact same semantics as compiler code.  I was more
concerned with this than performance payoffs.

  + generates .COFF files that are ready for linking.

  + Skips syntax tree processing and just assumes the default bytecode
is a good enough starting point.

I was going to say you couldn't make a .pyd in ShedSkin, but it looks
like you can do that too.

-Grant




From dejanews at email.com  Sun Aug 19 08:54:35 2007
From: dejanews at email.com (samwyse)
Date: Sun, 19 Aug 2007 12:54:35 GMT
Subject: 1)URL QueryString Parsing  2)Search Engine Spiders
In-Reply-To: <1187513415.188232.187270@50g2000hsm.googlegroups.com>
References: <1187513415.188232.187270@50g2000hsm.googlegroups.com>
Message-ID: <f4Xxi.28397$RX.20357@newssvr11.news.prodigy.net>

mosscliffe wrote:
> I am trying to create a back link, equivalent to the browser back
> action and I can not use java script. The target user does not allow
> java script.
> 
> I am using HTTP_REFERER.
> 
> I need to add the original Query String values.
> 
> Is there a way to get the QueryString element other than by using
> cgi.FieldStorage, as I just want to return with the values that were
> current in the calling page.
> 
> gv.orgQueryString = ""
> 
> gv.BackButton = '<A href="' + os.environ.get("HTTP_REFERER") +
> gv.orgQueryString + '">BACK</A>'

I'm not sure I understand your problem.  Does the above code not work?

> Am I right in thinking Search Engine Spiders will never see my script
> pages as they exist only for the duration of the python script's
> execution ?  And even then as they are   xxx.py, they would not be
> seen.

Anyone who accesses your web server will see the pages that you serve. 
If you serve the xxx.py files, then they can be seen and indexed, 
otherwise they are invisible.


From pavlovevidence at gmail.com  Thu Aug 30 02:43:14 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 30 Aug 2007 02:43:14 -0400
Subject: We need PIGs :)
References: <mailman.131.1188450658.28954.python-list@python.org>
Message-ID: <46d66ef1$0$18792$4c368faf@roadrunner.com>

On Thu, 30 Aug 2007 07:10:47 +0200, Martin Marcher wrote:
> My idea was to define "Python Implementation Guidelines" (PIGs) that
> specify a problem formalize it enough so that implementations are
> interchangeable (in this example create a module that has an
> "authenticate(username, password)" method so that one could easily take
> that module for any given app and then authenticate against postgres,
> and also against my plaintext file (which was the original - quite
> useless - implementation).
> 
> Does that sound like a good idea or would that be over formalization?

The Python community already did something for web applications (WSGI, I 
think).  Not sure how well that's working out.

Doing this kind of thing is not, of course, something that can be done in 
general for all problems.  It would only help if there's enough demand 
for interoperability that developers make the effort to adhere to the 
guidelines (which are rarely ideal for any particular situation).  
Although there are some informal standards that Python programmers often 
observe (for example, the interface of file-like objects), there isn't 
too much demand to standardize them.

I believe the Python language itself makes formal guidelines less 
helpful, because its dynamicism (among other things) makes is so good at 
interfacing.  That is, if you have two pieces of code that don't work 
together, it's easy to connect them.  Many people often call Python a 
good "glue" language for this reason.  And when you have a good "glue" 
language, formal interface guidelines aren't so important.



Carl Banks


From beliavsky at aol.com  Wed Aug 15 13:21:49 2007
From: beliavsky at aol.com (Beliavsky)
Date: Wed, 15 Aug 2007 10:21:49 -0700
Subject: Python Book Recommendations
In-Reply-To: <mailman.2015.1187189280.22759.python-list@python.org>
References: <d5506a9f0708141439v6a30d4c8l5092b30d269c1af4@mail.gmail.com>
	<Pine.LNX.4.44.0708141556370.5396-100000@violet.rahul.net>
	<1b31ae500708141638w77614014o6f382d0389bc69df@mail.gmail.com>
	<mailman.2015.1187189280.22759.python-list@python.org>
Message-ID: <1187198509.037033.79780@a39g2000hsc.googlegroups.com>

On Aug 15, 10:47 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> If I could have only one book, I would buy "Core Python, Second
> Edition," by Wesley Chun.

I have bought about half a dozen Python books but will purchase only
Python 3 books in the future, when they become available. I wonder
when that will be and if most of the current books will be revised to
conform to Python 3.



From bignose+hates-spam at benfinney.id.au  Thu Aug  2 02:12:03 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 02 Aug 2007 16:12:03 +1000
Subject: Emacs + python
References: <ak8x8v2udo.fsf@googlemail.com>
	<mailman.1476.1186017909.22759.python-list@python.org>
	<4vasi.139194$wG2.61677@newsfe17.lga>
Message-ID: <87myxabh3g.fsf@benfinney.id.au>

hg <hg at nospam.org> writes:

> Are there any cscope & ECB equivalent for Python ?

Can you describe these things, for those who don't have any experience
of them but may know of an equivalent?

-- 
 \        "With Lisp or Forth, a master programmer has unlimited power |
  `\     and expressiveness. With Python, even a regular guy can reach |
_o__)                            for the stars."  -- Raymond Hettinger |
Ben Finney


From grante at visi.com  Fri Aug 24 17:46:11 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 24 Aug 2007 21:46:11 -0000
Subject: py2exe/distutils: how to include a tree of files?
References: <13cuhdr58m5one7@corp.supernews.com>
Message-ID: <13cukd39lgsfgb4@corp.supernews.com>

On 2007-08-24, Grant Edwards <grante at visi.com> wrote:

> I'm packaging up a python program and need to include an entire
> directory tree in the distribution.

I've cobbled together something using package_dir/package_data
and  os.path.walk(), but it seems like a bit of a kludge...

-- 
Grant Edwards                   grante             Yow! You mean you don't
                                  at               want to watch WRESTLING
                               visi.com            from ATLANTA?


From kyosohma at gmail.com  Tue Aug 21 12:14:02 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 21 Aug 2007 09:14:02 -0700
Subject: How to optimise this code?
In-Reply-To: <mailman.68.1187711977.32294.python-list@python.org>
References: <mailman.68.1187711977.32294.python-list@python.org>
Message-ID: <1187712842.807766.118430@i38g2000prf.googlegroups.com>

On Aug 21, 10:59 am, "David N Montgomery" <monty.pyt... at fastmail.fm>
wrote:
> class testCase:
>     def __init__(self, tc):
>         if tc == 1:self.testCase1()
>         if tc == 2:self.testCase2()
>         if tc == 3:self.testCase3()
>         if tc == 4:self.testCase4()
>         if tc == 5:self.testCase5()
>         if tc == 6:self.testCase6()
>
>     def testCase1(self):
>         print "tc1"
>
>     def testCase2(self):
>         print "tc2"
>
>     def testCase3(self):
>         print "tc3"
>
>     def testCase4(self):
>         print "tc4"
>
>     def testCase5(self):
>         print "tc5"
>
>     def testCase6(self):
>         print "tc6"
>
>     def testCaseX(self):
>         print "tcX"
>
> totalNumberOfTestCases = 6
> x = 0
> while x <= totalNumberOfTestCases:
>     x += 1
>     testCase(x)
>
> This template code is working, but I envisage having 100+ test cases and
> am concerned about my useage of if statements. I would be grateful for
> any pointers as to how I can run all tests cases, regardless of how
> many, in a more efficient manner.
>
> Thank you in advance.

You're code doesn't make sense to me. You create a class and then you
call a method within the class without instantiating said class. What
the!?

Can't you just create a function?

<code>
def testCase(x):
    print "tc%s" % x

totalNumberOfTestCases = 6
x = 0
while x <= totalNumberOfTestCases:
    x += 1
    testCase(x)

</code>

Am I missing something?

Mike



From mclaugb at nospm.yahoo.com  Tue Aug  7 12:07:12 2007
From: mclaugb at nospm.yahoo.com (mclaugb)
Date: Tue, 7 Aug 2007 17:07:12 +0100
Subject: python system subprocess win32
References: <f9a0on$dee$1@gemini.csx.cam.ac.uk>
	<1186500091.063514.178640@e9g2000prf.googlegroups.com>
Message-ID: <f9a5c8$mvd$1@gemini.csx.cam.ac.uk>

At the moment, I cannot figure a way of running this precompiled "conv.exe" 
using commandline arguments.

Thus, I need Python to call the program, wait until it loads up, then enter 
a known sequence of characters so that the function will run.
The program conv.exe I call looks like this.
--------------------------
Welcome to conv.exe
This program was written by ....

Please select from the following options: h- (help) r- (read) ...etc
Enter your request:
---------------------------------
I need Python to start the program, wait a second and then issue a few 
characters to the program.

Hope this makes more sense!
Bryan

<kyosohma at gmail.com> wrote in message 
news:1186500091.063514.178640 at e9g2000prf.googlegroups.com...
> On Aug 7, 9:48 am, "mclaugb" <mcla... at nospm.yahoo.com> wrote:
>> Hello ALl,
>> I have a compiled program "conv.exe" that works as follows:>>conv.exe
>>
>> -----------------------------
>> Please selection from the following options.  press "h" for help, "p" for
>> print, "r" for readfile.
>> Enter your request now:
>> ...
>> --------------------
>> Is there a way to script python using the subprocess method to start this
>> program "conv.exe" and then send a "r" to the command line to make it, 
>> say,
>> readfile.
>>
>> I have tried the following but the .communicate("r) is not doing anything
>>
>> import subprocess
>> import time
>>
>> a=subprocess.Popen("c:\\mcml\\conv.exe")
>> time.sleep(1)
>> (stdout, stderr) = a.communicate("r")
>>
>> Many thanks,
>> Bryan
>
> Use the sys.argv method. In the code that you have compiled, put the
> following lines in:
>
> <code>
>
> import sys
> default = sys.argv[1]
> if default:
>   # check which option it is and run it appropriately
> else:
>   # print your menu here
>
> </code>
>
> Then you should be able to do the subprocess Popen command:
>
> subprocess.Popen("c:\\mcml\\conv.exe r")
>
> You may need to turn the shell on...
>
> subprocess.Popen("c:\\mcml\\conv.exe r", shell=True)
>
> Hopefully that gives you some ideas anyway.
>
> Mike
> 




From steve at holdenweb.com  Thu Aug  2 08:42:44 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Aug 2007 08:42:44 -0400
Subject: Use variable in regular expression
In-Reply-To: <1186051401.122847.114690@d55g2000hsg.googlegroups.com>
References: <1186051401.122847.114690@d55g2000hsg.googlegroups.com>
Message-ID: <46B1D144.8060108@holdenweb.com>

CarpeSkium at gmail.com wrote:
> I know I can use a variable in regular expressions. I want to use a
> regex to find something based on the beginning of the string. I am
> using yesterday's date to find all of my data from yesterday.
> Yesterday's date is 20070731, and assigned to the variable
> "yesterday_date". I want to loop thru a directory and find all of the
> yesterday's data ONLY IF the feature class has the date at the
> BEGINNING of the filename.
> 
> Sample strings:
> 20070731_test1
> Copy20070731_test1
> 20070731_test2
> Copy20070731_test2
> 20070731_test3
> Copy20070731_test3
> 
> I don't want the one's that start with "Copy". I can't figure out the
> syntax of inserting the "^" into the regex. I've tried all of the
> following, with no luck:
> 
> re.compile(^yesterday_date)
> re.compile(r'^yesterday_date')
> re.compile(r'^[yesterday_date]')
> re.compile(r'[^yesterday_date]')
> 
> I don't know what I'm doing and I'm just guessing at this point. Can
> anyone help? Thanks.
> 
As is often the case, taking a larger look at the problem can reveal 
that Python has features that can help you without even getting down to 
more complex stuff.

You appear to require a list of the files whose names begin with a 
string representation of yesterday's date.

If you take a look at the glob module you will see that it has a glob() 
function, and if you were to call it as

     names = glob.glob(yesterday_date + "*")

it would return a list of the names of the files you are interested in.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
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From aboudouvas at panafonet.gr  Mon Aug 13 08:08:32 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Mon, 13 Aug 2007 05:08:32 -0700
Subject: Eclipse/PyDev question
In-Reply-To: <1187005485.137101.43130@l70g2000hse.googlegroups.com>
References: <1186998539.030727.279330@g4g2000hsf.googlegroups.com>
	<1187005485.137101.43130@l70g2000hse.googlegroups.com>
Message-ID: <1187006912.494455.86830@w3g2000hsg.googlegroups.com>

On Aug 13, 1:44 pm, ga... at dsdata.it wrote:
> On Aug 13, 11:48 am, king kikapu <aboudou... at panafonet.gr> wrote:
>
> > Hi,
>
> > i am using Eclipse (Platform Runtime binary) with PyDev and i was
> > wondering if someone can help me with this:
>
> > 1. I set breakpoints to a .py file and i have told Eclipse to open the
> > Debug perspective when it sees that some .py file(s) of my project
> > indeed contains breakpoints. So, i press F9,  Eclipse starts, Debug
> > perspective opens and i can use the debugger just fine. But when the
> > app terminates, how can i tell Eclipse to switch automatically to the
> > PyDev perspective and not remain in the Debug one ?
>
> You don't, Eclipse keeps the same perspective because for what it
> knows you might want to debug some more and it correctly avoids to
> decide what is good for you. Switching to the debug perspective when
> you issue a debug command is an exception to the normal switching of
> perspectives with the respective big buttons and the menu.
> If you wish to switch perspective to edit code before debugging again,
> putting editors and appropriate accessory views in the debug
> perspective might be good enough.
>
> > 2. Let's say we have a project that consists of some .py files. I want
> > to press F9 when the editor displays anyone of these files but make
> > Eclipse to run the whole project (that has another .py as "default")
> > and not the script that i am currently working on, is that possible ??
>
> Executing the current file is a bad habit, Eclipse remembers a list of
> execution/debug configurations that can be selected from a dropdown
> list in the toolbar and edited with a dialog box; after you setup
> entry points for a project you can use and edit them as needed.
> I'm using Eclipse for Java and my entry points include remote
> debugging of a GUI application, about 6 JUnit tests, about 3 command
> line tools with many complex parameter sets each, and some Ant builds;
> it would take about one hour of trial and error to reconstruct the
> command lines, classpaths and JVM options. I only run the current file
> as a draft for an edited configuration.
>
> Regards,
> Lorenzo Gatti

Hey Lorenzo,

thanks for the help!

I understood that with the Debug perspective. Ok, i will, as
currently, have to swtick manually to PyDev.

But i cannot figgre out how i can tell Eclipse to run the whole
Project and not the currently active script that i work on...



From __peter__ at web.de  Wed Aug 22 14:47:33 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 22 Aug 2007 20:47:33 +0200
Subject: Problems with dynamic function creation.
References: <mailman.126.1187805245.32294.python-list@python.org>
Message-ID: <fai0c6$rn5$03$1@news.t-online.com>

Steven W. Orr wrote:

[snip mess]

> Everything works just fine (that I know of) except 

Sometimes you have to just fix the code you have. This however doesn't just
smell funny, it's hopeless. Start with clearly stating your goals and then
do a rewrite.

Should you need help again, remember post a self-contained example and an
actual traceback.

Peter



From steve at holdenweb.com  Mon Aug 13 06:48:57 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Aug 2007 06:48:57 -0400
Subject: Module imports during object instantiation
In-Reply-To: <4c3vo4-u7k.ln1@learner.hq.netapp.com>
References: <4c3vo4-u7k.ln1@learner.hq.netapp.com>
Message-ID: <f9pcuj$6n4$1@sea.gmane.org>

Ritesh Raj Sarraf wrote:
> Hi,
> 
> I've been very confused about why this doesn't work. I mean I don't see any
> reason why this has been made not to work.
> 
> class Log:
> 
>     def __init__(self, verbose, lock = None):
> 
>         if verbose is True:
>             self.VERBOSE = True
>         else: self.VERBOSE = False
> 
Better:

	self.VERBOSE = verbose

or, if you suspect verbose might pass in a mutable value,

         self.VERBOSE  bool(verbose)

> 
>         if lock is None or lock != 1:
>             self.DispLock = False

do you want to set self.lock here? IF so, a similar improvement could be 
made (though you would still need a test to create the lock object).

>         else:
>             self.DispLock = threading.Lock()
>             self.lock = True
> 
>         if os.name == 'posix':
>            self.platform = 'posix'
>            self.color = get_colors()
> 
>         elif os.name in ['nt', 'dos']:
>             self.platform = 'microsoft'
>             
>             try:
>                 import SomeModule
>             except ImportError:
>                 self.Set_Flag = None
>             
>             if self.Set_Flag is not None:
>                 self.color = SomeModule.get_colors_windows()
> 
>         else:
>             self.platform = None
>             self.color = None
> 
> When I create an object the "import" part never gets executed. Is there a
> reason behind it ?
> I mean I'd like to keep my class as independent as I want. So that when
> later I need to use it somewhere else, I don't need to know if it depends
> on any modules.
> 
> Currently, the way I'm left is to globally go and import the module and set
> a flag there.
> 
What's leading you to conclude the import isn't being executed? You 
realise, I trust, that the module's code will only be executed on the 
first call to __init__()?

You are right in assuming that __init__() is called once per instance 
created, and it's legitimate to make an import conditional in the way 
you have because of the "execute code only once" behavior - if the 
module is already in sys.modules then it won't be re-imported, the 
existing one will be used.

Having said all that, I still don't see why you can't just put the 
try/except at the top level of your code and have color be a global. Why 
repeat the attempted import and the computation for each object you 
create? Alternatively, do it at the class level, so it's only executed 
once when the class is declared?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From kyosohma at gmail.com  Wed Aug 29 09:25:23 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 29 Aug 2007 06:25:23 -0700
Subject: Pythonwin Install COM exceptions on Windows Vista Ultimate
In-Reply-To: <mailman.95.1188374497.28954.python-list@python.org>
References: <mailman.95.1188374497.28954.python-list@python.org>
Message-ID: <1188393923.239537.20590@50g2000hsm.googlegroups.com>

On Aug 28, 8:20 pm, "Sandipan News" <n... at sandipan.com> wrote:
> What do I do? Can't do without Python!
> Any experience, advice, hope is welcome.
> Thanks.
> Sandipan

You need to post the error traceback along with some more information
so the community can help.

Mike



From sullivanz.pku at gmail.com  Wed Aug  8 02:41:37 2007
From: sullivanz.pku at gmail.com (Sullivan WxPyQtKinter)
Date: Wed, 08 Aug 2007 06:41:37 -0000
Subject: Seek the one billionth line in a file containing 3 billion lines.
In-Reply-To: <7xzm12o7o7.fsf@ruckus.brouhaha.com>
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
	<7xzm12o7o7.fsf@ruckus.brouhaha.com>
Message-ID: <1186555297.877273.40540@o61g2000hsh.googlegroups.com>

On Aug 8, 2:35 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Sullivan WxPyQtKinter <sullivanz.... at gmail.com> writes:
> > This program:
> > for i in range(1000000000):
> >       f.readline()
> > is absolutely every slow....
>
> There are two problems:
>
>  1) range(1000000000) builds a list of a billion elements in memory,
>     which is many gigabytes and probably thrashing your machine.
>     You want to use xrange instead of range, which builds an iterator
>     (i.e. something that uses just a small amount of memory, and
>     generates the values on the fly instead of precomputing a list).
>
>  2) f.readline() reads an entire line of input which (depending on
>     the nature of the log file) could also be of very large size.
>     If you're sure the log file contents are sensible (lines up to
>     several megabytes shouldn't cause a problem) then you can do it
>     that way, but otherwise you want to read fixed size units.


Thank you for pointing out these two problem. I wrote this program
just to say that how inefficient it is to use a seemingly NATIVE way
to seek a such a big file. No other intention........



From arnau at ehas.org  Wed Aug  8 15:35:12 2007
From: arnau at ehas.org (Arnau Sanchez)
Date: Wed, 08 Aug 2007 21:35:12 +0200
Subject: Launch file from Python
In-Reply-To: <1186594611.490723.251870@m37g2000prh.googlegroups.com>
References: <1186594137.971393.128780@57g2000hsv.googlegroups.com>
	<1186594611.490723.251870@m37g2000prh.googlegroups.com>
Message-ID: <46BA1AF0.8020302@ehas.org>

kyosohma at gmail.com escribi?:

> That's just the exit status or run status, if I recall correctly. I
> think 0 (i.e. False) means it didn't run properly and anything else is
> True, or ok. Something like that. 

The other way: 0 means "ok" while everything else means error (at least in 
UNIX). The reason is clear: there is usually only one way to do things well, but 
many to fail :-)

> Technically speaking, you should
> probably switch to using the subprocess module as it is replacing that
> os module's functionality: http://www.python.org/doc/2.4/lib/module-subprocess.html

Correct, subprocess replaces low-level os.system, os.popen*, os.spawn*, popen* 
functions.


From andrew.sain at gmail.com  Tue Aug 21 13:48:12 2007
From: andrew.sain at gmail.com (andrew.sain at gmail.com)
Date: Tue, 21 Aug 2007 10:48:12 -0700
Subject: Submit Your Python Scripts
Message-ID: <1187718492.549619.164440@w3g2000hsg.googlegroups.com>

Hi, just wanted to invite any Python script authors to submit their
Python script to our popular software site
at http://www.myzips.com

We have just today added a "Scripts" directory which includes a Python
subdirectory
http://www.myzips.com/category/Scripts/

The first submissions usually maintain a high position in our
directories so the sooner you can get your
script listed the more exposure you should be able to receive for your
script.

You can also submit PHP, AJAX, ASP, Ruby on Rails, CGI, Flash, Python,
CFML, .NET, Java, XML and C/C++ scripts and coding.

Thanks for your time,
Andy



From claird at lairds.us  Wed Aug  8 16:23:45 2007
From: claird at lairds.us (Cameron Laird)
Date: Wed, 8 Aug 2007 20:23:45 +0000
Subject: Issues of state (was: Tkinter or wxpython?)
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1684.1186422197.22759.python-list@python.org>
	<gg9mo4-p2m.ln1@lairds.us> <7x8x8mpn37.fsf@ruckus.brouhaha.com>
Message-ID: <hblpo4-mgj.ln1@lairds.us>

In article <7x8x8mpn37.fsf at ruckus.brouhaha.com>,
Paul Rubin  <http://phr.cx at NOSPAM.invalid> wrote:
			.
			.
			.
>I'm not sure what you're getting at in this context.  You can write a
>desktop app where the window system communicates with a gui toolkit
>through a socket (at least that's how X windows works), or you can
>write a web app where a browser communicates with an http listener
>through a socket.  What's the difference, as far as application state
>is concerned?  
>
>I haven't used wxpython but for tkinter you'd typically have a gui
>event loop in its own thread, communicating with the application
>through queues.  Similarly you can use BaseHTTPServer to collect
>browser hits and get the data out of them with the cgi module
>functions before passing them to the app.  If you want to handle
>multiple concurrent users you get into the usual issues of web
>servers, but if you're just doing a single user web implementation as
>an alternative to a desktop gui, some rudimentary locking is probably
>enough to stop accidental simultaneous connections.
>
>If the application is simple enough, you can just write it as a cgi
>and keep the state in disk files.

Others have answered this at other levels.  In elementary terms,
there truly is a difference, Paul, and one that's widely reified:
a "desktop client-server" application typically listens through
one socket, which therefore constitutes an index of the connection
or client, while a Web application communicates through a sequence
of independent HTTP transactions.  The latter can manage state only
to the extent it passes session information around.

As you correctly point out, there certainly are plenty of Web appli-
cations which cheerfully *do* pass session information.  As common
as it is, though--and I'm *still* writing CGI on occasion, a decade
after I was convinced it was a dead technique--it's not automatic.
HTTP is a stateless protocol, and therefore state management must
remain an issue.


From kyosohma at gmail.com  Wed Aug 29 11:32:35 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 29 Aug 2007 08:32:35 -0700
Subject: What's the difference ?
In-Reply-To: <1i3ljx0.et1tyg1lxph4nN%aleax@mac.com>
References: <1188394767.333396.129020@r29g2000hsg.googlegroups.com>
	<1188396199.136398.321900@r34g2000hsd.googlegroups.com>
	<1i3ljx0.et1tyg1lxph4nN%aleax@mac.com>
Message-ID: <1188401555.590025.175330@o80g2000hse.googlegroups.com>

On Aug 29, 9:44 am, al... at mac.com (Alex Martelli) wrote:
> <kyoso... at gmail.com> wrote:
>
>    ...
>
> > Weird. Hetland's book, "Beginning Python" states that it's a matter of
> > taste.
>
> If your taste is for more verbose AND slower notation without any
> compensating advantage, sure.
>
> > Martelli's "Python Cookbook 2nd Ed." says to use the get()
> > method instead as you never know if a key is in the dict.  However, I
> > can't seem to find any reference to has_key in his book.
>
> .get is not a direct alternative to ``in'' (it's an alternative to an
> idiom where you key into the dict if the key is present and otherwise
> supply a default value, and it's MUCH better in that case).  has_key is
> probably not even mentioned in the Cookbook (2nd edition) since there is
> never a good need for it in the Python versions it covers (2.2 and up),
> but you can probably find traces in the 1st edition (which also covered
> Python back to 1.5.2, where has_key *was* needed); the Nutshell (2nd ed)
> mentions it briefly in a table on p. 60.
>
> > According to Chun in "Core Python Programming", has_key will be
> > obsoleted in future versions of Python, so he recommends using "in" or
> > "not in".
>
> Yes, we're removing has_key in Python 3.0 (whose first alpha will be out
> reasonably soon, but is not going to be ready for production use for
> quite a bit longer), among other redundant things that exist in 2.* only
> for legacy and backwards compatibility reasons.  This makes 3.0 simpler
> (a little closer to the "only one obvious way" ideal).
>
> But you should use ``in'' and ``not in'' anyway, even if you don't care
> about 3.* at all, because they only have advantages wrt has_key, without
> any compensating disadvantage.
>
> Alex

Martelli,

I kind of figured .get wasn't a direct alternative to "in", but I
thought the OP might be able to use it since (s)he didn't mention what
they wanted to do.

Mike



From hide1713 at gmail.com  Wed Aug  1 01:32:14 2007
From: hide1713 at gmail.com (hide1713 at gmail.com)
Date: Wed, 01 Aug 2007 05:32:14 -0000
Subject: How does xmlrpc work ?
Message-ID: <1185946334.436503.326920@x40g2000prg.googlegroups.com>

Hi everyone
I am working on a system which used XMLRPC to communicate between
hundreds of computer. One administrative computer keeps hundreds of
xmlrpc instance of other computers.  I want to know if evey instance
use a single connection and keep it alive forever OR create a new
connection when a method is called and end it after the call is
finished?

Thank you



From pavlovevidence at gmail.com  Fri Aug 31 00:21:01 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 30 Aug 2007 21:21:01 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1i3o9kr.2gmni61g62moaN%aleax@mac.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
Message-ID: <1188534061.243009.89640@m37g2000prh.googlegroups.com>

On Aug 30, 10:20 pm, al... at mac.com (Alex Martelli) wrote:
> Russ <uymqlp... at sneakemail.com> wrote:
>
>    ...
>
> > programs." Any idea how much Python is used for flight control systems
> > in commercial
> > transport aircraft or jet fighters?
>
> Are there differences in reliability requirements between the parts of
> such control systems that run on aircraft themselves, and those that run
> in airports' control towers?

Yes.

>  Because Python *IS* used in the latter
> case, cfr <http://www.python.org/about/success/frequentis/> ... if
> on-plane control SW requires hard-real-time response,

Yes.

> that might be a
> more credible reason why Python would be inappropriate (any garbage
> collected language is NOT a candidate for hard-real-time SW!) than your
> implied aspersions against Python's reliability.

Not really relevant, since there is no (or very little) dynamic memory
allocation.

Python really isn't suitable for in-flight controls for various
reasons, and mission critical concerns is a minor one (systems with
less underlying complexity tend to have fewer failure modes).  But
mostly it's raw throughput: Python is just too slow.  Flight control
computers have to be powerful enough make a ton of mathematical
calculations in a matter of milliseconds, and under strict weight and
power constraints.  The cost of running 100 times slower than optimal
is just too high.

At my current project, we're struggling with throughput even though we
use highly optimized code.  Python would be completely out of the
question.

Now, control towers don't have these constraints, and system failure
is not nearly as critical, so Python is a better option there.


Carl Banks



From martin at v.loewis.de  Sun Aug  5 14:06:59 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 05 Aug 2007 20:06:59 +0200
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <87bqdlswbn.fsf@pobox.com>
References: <87bqdlswbn.fsf@pobox.com>
Message-ID: <46b611c4$0$24872$9b622d9e@news.freenet.de>

> I'm surprised to read this:
> 
> http://en.wikipedia.org/wiki/Python_3
> 
> """Note that while there is no explicit requirement that code be able
> to run unmodified in both versions, in practice it is quite likely for
> most code. As of January 2007, it looks like most reasonable code
> should run quite well under either branch."""

It's difficult to predict the future, but I think this statement is
a fair description.

> 
> I haven't been following Python 3 development recently.  Have things
> really changed that much?  Last time I looked, e.g. dict.items() no
> longer returned a list.

Correct.

> Seems unlikely that most code will run on 2
> and 3, in that case,

Why that? Most reasonable code doesn't care what dict.items returns,
as it reads like

for k,v in dict.items():
  do_something_with(k,v)

> and IIUC Guido has said all along that not much
> code will run on both.

I think you misunderstood. It's not a design goal that code works
without modifications, yet most reasonable code will even without
that being an explicit goal.

Regards,
Martin


From iansan at gmail.com  Thu Aug 30 18:16:30 2007
From: iansan at gmail.com (IamIan)
Date: Thu, 30 Aug 2007 22:16:30 -0000
Subject: Simple elementtree question
In-Reply-To: <46D71A5E.1000005@web.de>
References: <1188495178.701968.246690@50g2000hsm.googlegroups.com>
	<46D71A5E.1000005@web.de>
Message-ID: <1188512190.384302.125730@m37g2000prh.googlegroups.com>

Thank you very much! That did it.

In the source XML <item> tags have rdf:about attributes with the link
to the story, and it was here I planned on grabbing the link and
matching it up with the <title> child text. After seeing the output of
elmenttree's getiterator() though, it now looks like each item, title,
description, and link is a separate element...

I could use a dictionary or lists to match the first title to the
first link, but is there a more elegant way in elementtree (or
otherwise) to do this?

Thanks again,

Ian



From rcdailey at gmail.com  Mon Aug 20 15:51:02 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 20 Aug 2007 14:51:02 -0500
Subject: optparse - required options
Message-ID: <496954360708201251r137dfaedqe632361891eae343@mail.gmail.com>

Hi,

I've been reading through the python documentation on the optparse module
and I was unable to find out how to specify if an option is optional or
required. The documentation vaguely states that actions can be used to do
this, however I was not able to figure out how. If anyone could help I'd
greatly appreciate it.
-------------- next part --------------
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From mail at timgolden.me.uk  Fri Aug 31 06:19:31 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 31 Aug 2007 11:19:31 +0100
Subject: OT: pronounciation [was: list index()]
In-Reply-To: <46D7E36D.4000301@timgolden.me.uk>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<1188497498.3468.60.camel@dot.uniqsys.com>	<mailman.188.1188546300.28954.python-list@python.org>	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>	<1188551958.728836.137370@x35g2000prf.googlegroups.com>	<fOadnfwlCJbQfErbnZ2dnUVZ_jCdnZ2d@speakeasy.net>
	<46D7E36D.4000301@timgolden.me.uk>
Message-ID: <46D7EB33.7030908@timgolden.me.uk>

Tim Golden wrote:
> Erik Max Francis wrote:
>> Paddy wrote:
>>
>>> I say the 'oll' in troll like the 'ol' in frolic, and pronounce roll
>>> and role similarly.
>>>
>>> My accent is probably from the East Midlands of the UK, but is not
>>> pronounced.
>> _Troll_ and _frolic_ aren't pronounced with the same "o" sound in any 
>> accent I've ever heard of.  Which you pronounce _boat_ and _bot_ the 
>> same way, too?
> 
> [Amusingly contemplating a trolling war about the pronunciation of "troll"]
> 
> Well they sound the same in my more-or-less South London accent.
> I can't write those funny phonetic symbols (and I hate to
> imagine the Unicode encoding hoops I'd have to jump through
> to make them readable anyway) but both "o"s sound short to me.
> Like "bot" rather than "boat" using your example.

Since we're talking... I'm still a little startled when I listen
to some of the excellent webcasts that are being produced these
days (showmedo.com and friends) and hear American voices pronounce
Python... well, the way they do, with the stress and something of a
drawl on the second syllable. I'm sure it's just as amusing the other
way round: we pronounce it with the stress on the first syllable and
the characteristic short vowel sound in the second.
(Something like: Pie'thun).

TJG


From vijay.kumar.75in at gmail.com  Mon Aug 20 02:41:46 2007
From: vijay.kumar.75in at gmail.com (vijay.kumar.75in at gmail.com)
Date: 19 Aug 2007 23:41:46 -0700
Subject: best GUI library for vector drawing program
In-Reply-To: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
Message-ID: <1187361616.270300.246480@e9g2000prf.googlegroups.com>

Hi All,

Today I have downloaded a SWT Software which is great to its features.
You can learn
many GUI details out of it. The basic functionality is it lists IP
Addresses of the
remote PC's your system is accessing.

You may find the project under sourceforge.net

http://sourceforge.net/projects/nettymaster

You can customize this software, please let me know your views



From http  Fri Aug 31 01:07:47 2007
From: http (Paul Rubin)
Date: 30 Aug 2007 22:07:47 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<m2wsvc1g12.fsf@manolo-blahnik.bibliotech.com>
Message-ID: <7xr6lk5m1o.fsf@ruckus.brouhaha.com>

Robert Brown <bbrown at speakeasy.net> writes:
> In any case, I'm still not sure whether it would be useful to integrate DbC
> into Python.  

I guess I'm a little confused about what it would mean.  Suppose you
want to write a function that looks for a value using binary search
in a sorted list, n = bsearch(a,x).  The contract is:

  precondition: the input list a is sorted.
  postcondition: the output is an integer n, such that if
     x is an element of the list, then a[n] == x.  If x is not
     in the list, then n is -1.

This is a reasonable application of dbc since the precondition and
postcondition are easy to specify and check, but the binary search
algorithm is tricky enough to be susceptible to implementation errors.

The trouble is, the obvious way to write the precondition and
postcondition take linear time, while the binary search should take
log(n) time.  In the traditional unit test approach, that's ok, you'd
run the test as part of the build process but not each time the
function is actually called.  With something like SPARK/Ada (and maybe
Eiffel), you'd statically validate the conditions.  But in Python, the
check occurs at runtime unless you disable it, famously compared to
wearing your parachute on the ground but taking it off once your plane
is in the air.

I guess one difference from unit test philosophy is that at least
sometime, you'd run the entire application with all the dbc checks
enabled, and just live with the slowdown.


From nepbabucxspamfree at yahoo.ca  Mon Aug 20 19:06:21 2007
From: nepbabucxspamfree at yahoo.ca (Bikal KC)
Date: Tue, 21 Aug 2007 08:36:21 +0930
Subject: Xah's Edu Corner: Under the spell of Leibniz's dream
In-Reply-To: <1187598193.118227.270460@19g2000hsx.googlegroups.com>
References: <1187567809.896668.228650@z24g2000prh.googlegroups.com>
	<1187598193.118227.270460@19g2000hsx.googlegroups.com>
Message-ID: <46ca1e65$1_3@news.chariot.net.au>

Ingo Menger wrote:
> On 20 Aug., 01:56, Xah Lee <x... at xahlee.org> wrote:
> 
>> (for you math illiterates out there: ...
>> (for you mathematicians out there: ...
> 
> Please, Xah Lee, could you possibly stop to "explain" things that are
> absolutely trivial? If somebody has doubts about the etymology of a
> word, he may use the dictionary, or he could ask.
> 
> 

I used usenet years ago then stopped for couple of years. I remember
seeing him/her on c.l.perl I believe doing the same thing he/she is
doing atm. I'd say the ultimate usenet superstar. Wow!


From jmtulloss at gmail.com  Fri Aug 10 19:17:52 2007
From: jmtulloss at gmail.com (Justin T.)
Date: Fri, 10 Aug 2007 23:17:52 -0000
Subject: The Future of Python Threading
In-Reply-To: <mailman.1838.1186767296.22759.python-list@python.org>
References: <1186763839.203679.110810@z24g2000prh.googlegroups.com>
	<mailman.1838.1186767296.22759.python-list@python.org>
Message-ID: <1186787872.040419.132630@g12g2000prg.googlegroups.com>

On Aug 10, 10:34 am, Jean-Paul Calderone <exar... at divmod.com> wrote:

> >I'm not an expert, but I understand that much. What greenlets do is
> >force the programmer to think about concurrent programming. It doesn't
> >force them to think about real threads, which is good, because a
> >computer should take care of that for you.Greenlets are nice because
> >they can run concurrently, but they don't have to. This means you can
> >safely divide them up among many threads. You could not safely do this
> >with just any old python program.
>
> There may be something to this.  On the other hand, there's no _guarantee_
> that code written with greenlets will work with pre-emptive threading instead
> of cooperative threading.  There might be a tendency on the part of developers
> to try to write code which will work with pre-emptive threading, but it's just
> that - a mild pressure towards a particular behavior.  That's not sufficient
> to successfully write correct software (where "correct" in this context means
> "works when used with pre-emptive threads", of course).
Agreed. Stackless does include a preemptive mode, but if you don't use
it, then you don't need to worry about locking at all. It would be
quite tricky to get around this, but I don't think it's impossible.
For instance, you could just automatically lock anything that was not
a local variable. Or, if you required all tasklets in one object to
run in one thread, then you would only have to auto-lock globals.

>
> One also needs to consider the tasks necessary to really get this integration
> done.  It won't change very much if you just add greenlets to the standard
> library.  For there to be real consequences for real programmers, you'd
> probably want to replace all of the modules which do I/O (and maybe some
> that do computationally intensive things) with versions implemented using
> greenlets.  Otherwise you end up with a pretty hard barrier between greenlets
> and all existing software that will probably prevent most people from changing
> how they program.

If the framework exists to efficiently multi-thread python, I assume
that the module maintainers will slowly migrate over if there is a
performance benefit there.
>
> Then you have to worry about the other issues greenlets introduce, like
> invisible context switches, which can make your code which _doesn't_ use
> pre-emptive threading broken.

Not breaking standard python code would definitely be priority #1 in
an experiment like this. I think that by making the changes at the
core we could achieve it. A standard program, after all, is just 1
giant tasklet.
>
> All in all, it seems like a wash to me.  There probably isn't sufficient
> evidence to answer the question definitively either way, though.  And trying
> to make it work is certainly one way to come up with such evidence. :)

::Sigh:: I honestly don't see myself having time to really do anything
more than experiment with this. Perhaps I will try to do that though.
Sometimes I do grow bored of my other projects. :)

Justin



From david at nospam.spam  Tue Aug 21 04:10:37 2007
From: david at nospam.spam (david)
Date: Tue, 21 Aug 2007 18:10:37 +1000
Subject: wxPython before MainLoop
In-Reply-To: <6a6dnfbbFJNzcCbbnZ2dnUVZ_oudnZ2d@comcast.com>
References: <13bl9a75laqcm70@corp.supernews.com>
	<6a6dnfbbFJNzcCbbnZ2dnUVZ_oudnZ2d@comcast.com>
Message-ID: <13cl7ftdvac9ab2@corp.supernews.com>

Thanks for that suggestion, and sorry I took so
long to get back to you. That worked.

Because I don't want the splash screen, just
	self.Update

regards,

[david]

Heikki Toivonen wrote:
> [david] wrote:
>> I'd like to refresh the display before I start the main loop.
> 
> We have this kind of situation in Chandler, where we display and update
> the splash screen before we enter MainLoop.
> 
> 1. Create app object
>    http://lxr.osafoundation.org/source/chandler/Chandler.py#080
> 
> 2. During app object creation, in OnInit, put up splash screen and update it
> 
> http://lxr.osafoundation.org/source/chandler/application/Application.py#433
> 
> 3. The splash screen refresh is basically: draw new stuff,
> self.Layout(), self.Update(), wx.Yield()
> http://lxr.osafoundation.org/source/chandler/application/Application.py#1421
> 
> 3. Start MainLoop
>    http://lxr.osafoundation.org/source/chandler/Chandler.py#086
> 


From igorr at ifi.uio.no  Wed Aug 22 04:12:32 2007
From: igorr at ifi.uio.no (Igor V. Rafienko)
Date: 22 Aug 2007 10:12:32 +0200
Subject: non-blocking communication with imaplib
Message-ID: <xjv8x84dm33.fsf@oinn.ifi.uio.no>


Hi,


I was wondering if anyone had a suggestion for the following issue. I
would like to talk to an IMAP-server, imaplib being the tool of
choice, of course. Unfortunately it may happen that the IMAP-server
fails to respond to certain commands, and I would like to be able to
detect that within a given time period (on the scale of 5-10 seconds).

Initially, I thought about playing with setsockblocking() for the
communication socket in the imaplib.IMAP4 object. However, the IMAP4
object uses a file object ("created from" the said socket), and the
underlying socket must be blocking according to [1].

Is there another option for detecting when the server fails to reply
within a given time slot? Could I perhaps temporarily set the socket
to non-blocking mode? Or maybe I am attacking this problem the wrong
way altogether?

Any hints would be greatly appreciated.

TIA,





ivr
[1] <http://docs.python.org/lib/socket-objects.html#l2h-3693>
-- 
<+Kaptein-Dah> igorr: for f? parenteser
<+Kaptein-Dah> igorr: parenteser virker som lubrication under iterasjon
<+Kaptein-Dah> igorr: velkjent


From larry.bates at websafe.com  Wed Aug 15 16:02:13 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 15 Aug 2007 15:02:13 -0500
Subject: Who told str() to round my int()'s!!!
In-Reply-To: <mailman.1857.1186861157.22759.python-list@python.org>
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>	<9qmvi.47364$s5.1537219@phobos.telenet-ops.be>
	<mailman.1857.1186861157.22759.python-list@python.org>
Message-ID: <3ZudnUuJ68lcxl7bnZ2dnUVZ_t_inZ2d@comcast.com>

Steve Holden wrote:
> Roel Schroeven wrote:
>> Adam W. schreef:
>>> After a fair amount of troubleshooting of why my lists were coming
>>> back a handful of digits short, and the last digit rounded off, I
>>> determined the str() function was to blame:
>>>
>>>>>> foonum
>>> 0.0071299720384678782
>>>>>> str(foonum)
>>> '0.00712997203847'
>>>
>>> Why in the world does str() have any business rounding my numbers, and
>>> how do I get around this?
>>
>> You could use repr() instead of str() (AFAIK that's what the
>> interactive interpreter used to print your foonum), but in any case
>> you should be aware of the limits inherent in floating point
>> arithmetic and in conversions between decimal and binary fractions.
>> See e.g. http://docs.python.org/tut/node16.html
>>
>>
> I should also point out that the subject line for this thread is
> inaccurate, as it wasn't rounding ints at all.
> 
> regards
>  Steve

What are they teaching in schools these days?  I see questions like this and the
equally perplexing "why don't floats represent numbers exactly?" or the mildy
amusing "how do I write bytes not characters to a file" questions at least once
a week on this forum.

-Larry


From arkanes at gmail.com  Wed Aug  1 12:59:35 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 1 Aug 2007 11:59:35 -0500
Subject: Awkward format string
In-Reply-To: <1185986578.527619.314310@e9g2000prf.googlegroups.com>
References: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
	<mailman.1440.1185985928.22759.python-list@python.org>
	<1185986578.527619.314310@e9g2000prf.googlegroups.com>
Message-ID: <4866bea60708010959j789902anf27b33f46fcf8236@mail.gmail.com>

On 8/1/07, beginner <zyzhu2000 at gmail.com> wrote:
> On Aug 1, 11:31 am, "Chris Mellon" <arka... at gmail.com> wrote:
> > On 8/1/07, beginner <zyzhu2... at gmail.com> wrote:
> >
> > > Hi,
> >
> > > In order to print out the contents of a list, sometimes I have to use
> > > very awkward constructions. For example, I have to convert the
> > > datetime.datetime type to string first, construct a new list, and then
> > > send it to print. The following is an example.
> >
> > >         x=(e[0].strftime("%Y-%m-%d"), e[1].strftime("%Y-%m-%d"))+e[2:]
> > >         print  >>f, "%s\t%s\t%d\t%f\t%f\t%f\t%d" % x
> >
> > > e is a tuple. x is my new tuple.
> >
> > > Does anyone know better ways of handling this?
> >
> > You seem to be doing quite complicated things with your magical e
> > tuple. Do you have some specific aversion to classes?
>
> e is not complicated. It is a record that have 7 fields. In my program
> a function outputs a list of tuples, each is of type e, and now I just
> need to send them to a text file.
>
> I have no problem using classes and I do use them everywhere. But
> using classes does not solve my problem here. I will probably find
> myself doing:
>
> print  >>f, "%s\t%s\t%d\t%f\t%f\t%f\t%d" % (x.field1..strftime("%Y-%m-
> %d"), x.field2..strftime("%Y-%m-%d"), x.field3, x.field4, x.field5,
> x.field.6, x.field7)
>
> This is also tedious and error-prone.
>

If you ever need to write this more than once you're doing it wrong.
I'm not sure what's "tedious and error prone" about specifying the
format of your data file.


From rcdailey at gmail.com  Wed Aug 22 14:17:44 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Wed, 22 Aug 2007 13:17:44 -0500
Subject: Class destruction
Message-ID: <496954360708221117pd7465fr838a24b167a1dcdd@mail.gmail.com>

Hi,

I'm wondering where the most appropriate location is to cleanup class
objects. For example, i have a file handle as an instance attribute in one
of my classes and I need to call f.close() on it when the class object falls
out of scope. Any ideas? I've tried __del__() but I don't remember this
working for some reason. I might try it again later just to be positive.

Below is the source code to the class I'm attempting to add a destructor to:


import struct

#########################################################

class fout:
    def __init__( self, filename ):
        self._file = open( filename, "wb" )

    def write32( self, data ):
        # write out a 32-bit integer value
        self._file.write( struct.pack( "I", data ) )

    def write16( self, data ):
        # write out a 16-bit integer value
        self._file.write( struct.pack( "H", data ) )

    def write8( self, data ):
        # write out an 8-bit integer value
        self._file.write( struct.pack( "B", data ) )

    def write( self, data ):
        # write out a string literal
        self.write32( len( data ) )
        self._file.write( data )
        self._file.flush()
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From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Aug 19 08:37:23 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 19 Aug 2007 14:37:23 +0200
Subject: Development for dual core machine
References: <1187515287.226791.186700@j4g2000prf.googlegroups.com>
Message-ID: <5iqrs3F3qanv6U2@mid.individual.net>

Andy wrote:

> I'm going to develop a software package that includes a web server
> (and PHP code) , a database, and some Python code of course.  I am
> being strongly suggested to make it to work on a dual- or
> multi-core computer, 

No problem. CPython will work on any dual core CPU.

> but I'm confused on how to take advantage of the multiple CPUs.

First: Use a web server that can make use of multiple cores.

Second: Use a data base that can make use of multiple cores.

Third, for using multiple cores from CPython: this is an FAQ, please
look at the mailing list archives. Whether you should optimize your
python application to use all cores strongly depends on what your
Python application actually does.
 
> From what I read, I think that simply by making the package run in
> several separate processes (web server, database server, Python
> interpreter, etc.), and/or using multiple threads (which I will
> anyway) the package should be able to use multiple CPUs.

CPython has the GIL (global interpreter lock). Please search for it
in the archives, it's been discussed exhaustingly.
 
> And how is it decided which process and which threads go to CPU 1,
> CPU 2, etc.? Perhaps the BIOS?

No, the kernel (i. e., Linux). The BIOS is completely out of this.

Regards,


Bj?rn

-- 
BOFH excuse #388:

Bad user karma.



From fuzzyman at gmail.com  Wed Aug  1 21:09:41 2007
From: fuzzyman at gmail.com (Fuzzyman)
Date: Thu, 02 Aug 2007 01:09:41 -0000
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <mailman.1475.1186015988.22759.python-list@python.org>
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
	<mailman.1475.1186015988.22759.python-list@python.org>
Message-ID: <1186016981.502313.268700@r34g2000hsd.googlegroups.com>

On Aug 2, 1:46 am, "Greg Donald" <gdon... at gmail.com> wrote:
> On 8/1/07, John K Masters <johnmast... at oxtedonline.net> wrote:
>
> > If their support for paid customers is anything like their support for
> > prospective customers then I would leave well alone.
>
> I had no problems with their support whatsoever, really good in my
> opinion.  They were very responsive and addressed all my questions
> over about a 3 or 4 day email conversation.
>
> --
> Greg Donaldhttp://destiney.com/

I'll third that. I have had excellent and extended support from the
Wing guys. Definitely recommended.

Fuzzyman
http://www.voidspace.org.uk/python/articles.shtml



From wolf_tracks at invalid.com  Wed Aug 22 20:36:00 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Thu, 23 Aug 2007 00:36:00 GMT
Subject: What Are These Import/From Statements about?
In-Reply-To: <mailman.137.1187815545.32294.python-list@python.org>
References: <un_yi.34471$2v1.24183@newssvr14.news.prodigy.net>	<mailman.123.1187804723.32294.python-list@python.org>	<qb0zi.47332$Um6.34487@newssvr12.news.prodigy.net>
	<mailman.137.1187815545.32294.python-list@python.org>
Message-ID: <QD4zi.47346$Um6.28801@newssvr12.news.prodigy.net>

Thanks very much. Where's the global index?

Matt McCredie wrote:
>> While that's an interesting link, I was thinking of the named items like:
>>  Numeric, (this one I know about.)
>>  Image
>>  ImageChops
>>  ImageTk
>>  time
>>  binascii
>>  tkMessageBox
>>  tkSimpleDialog
> 
> The `image' ones are all part of PIL (Python Imaging Library) which is
> a third party module (http://www.pythonware.com/products/pil/). The
> others: time, binascii, os.path, tkMessageBox and tkSimpleDialog are
> all part of the standard library
> (http://docs.python.org/modindex.html). I don't see the documentation
> for the tk* ones in the global module index, but you can always look
> at the source. I'm not sure what MakeQTE is. If this is a program you
> are able to run, you should be able to do something like this:
> 
>>>> import MakeQTE
>>>> print MakeQTE.__file__
> 
> That will show you where it lives, and you can then look at the source
> for more clues.
> 
> Also, you should be able to do this:
> 
>>>> import MakeQTE
>>>> help(MakeQTE)
> 
> Which will also likely give you some good clues.
> 
> -Matt

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From steve at holdenweb.com  Thu Aug 16 23:23:13 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Aug 2007 23:23:13 -0400
Subject: why psyco using more memery in liunx?
In-Reply-To: <005d01c7e078$c13d0ed0$811ba8c0@kyom>
References: <005d01c7e078$c13d0ed0$811ba8c0@kyom>
Message-ID: <46C514A1.9060503@holdenweb.com>

kyo guan wrote:
> Hi all:
> 
> 	When you import psyco in python2.5, you can see the memery grow up near 40MB in linux. but the same version python and
> psyco, is only grow up 1MB under windows. 
> 
Please don't repeat the question again. It *has* reached the list. 
Patience is a virtue ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From fabioztessitore at libero.it  Fri Aug  3 16:59:52 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 03 Aug 2007 20:59:52 GMT
Subject: Global package variable, is it possible?
References: <1186160415.065108.139160@e9g2000prf.googlegroups.com>
	<46b36b31$0$10622$4fafbaef@reader2.news.tin.it>
	<mailman.1581.1186165038.22759.python-list@python.org>
Message-ID: <46b39748$0$17945$4fafbaef@reader1.news.tin.it>

Il Fri, 03 Aug 2007 14:16:59 -0400, Carsten Haese ha scritto:

> Right idea, wrong execution. Note that the OP said "I'd like to be able
> to reload the config file dynamically and have all my modules
> automatically receive the new config."

You are obviously right ... I haven't read all the post, sorry!

Only for knowing more about modules: is there a way to dinamically reload 
an already imported module?

bye
Fabio


From gherzig at fmed.uba.ar  Tue Aug 28 18:51:50 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Tue, 28 Aug 2007 19:51:50 -0300
Subject: Is it reasonably easy easy to something like this with python?
In-Reply-To: <1188335743.394160.254680@x35g2000prf.googlegroups.com>
References: <1188326947.527698.245770@r23g2000prd.googlegroups.com>	<mailman.78.1188327771.28954.python-list@python.org>
	<1188335743.394160.254680@x35g2000prf.googlegroups.com>
Message-ID: <46D4A706.3090804@fmed.uba.ar>

walterbyrd wrote:

>On Aug 28, 1:31 pm, Gerardo Herzig <gher... at fmed.uba.ar> wrote:
>  
>
>>walterbyrd wrote:
>>    
>>
>
>  
>
>>The one who make that table sorteable is AJAX. Not php. The php part is
>>kind of trivial (so it would be `trivial' in python too). It just reads
>>some data and format it in an html table.
>>    
>>
>
>
>Thank you, that is great to know. What if there were 1000 records, and
>the table was paginated? I suppose, ajax would sort the front end, and
>backend language, and database, would soft behind the scene, or
>something?
>
>  
>
Im not an AJAX expert (not even close actually. In fact i just used it 
once), but seems like you will have to reload all the page (all the 
table at least). Because now is a different scenario. If the table is 
paginated, it looks like you will send, say 50 results at one time, then 
(when  pressing 'next 50'), anhoter 50, and so on. So AJAX only will 
have THOSE 50 for ordering. Another approach would be returning de 
entire recordset, and implement all the 'next' and 'previous' links via 
AJAX. And i dont think you will like to send the entire result. I dont.

What will i do (at least from WIK for now), is having a set of `hrefs' 
(maybe with some nice arrows) in all of the table headers, to indicate 
the desired order you want to get. And, if you have a column table named 
'age', you will make those href like
'<a 
href=showmethetable.py?columnorder=age&ordertype=asc><nice_arrow_graphic>'

then your cgi python script will take that mess after the ? sign, parse 
it (via cgi module perhaps), and make a new query, with the 'order by 
age asc' clause, wich are the 'arguments' in the url.

There is allways a lot of ways to do some stuff. I will check into de 
AJAX list too!

Cheers.
Gerardo


From QJing.Li at gmail.com  Mon Aug 20 01:53:18 2007
From: QJing.Li at gmail.com (math2life)
Date: Mon, 20 Aug 2007 05:53:18 -0000
Subject: Call for advice on how to start PyOpenGL!
Message-ID: <1187589198.616866.280500@j4g2000prf.googlegroups.com>

I work with python for two years, are familiar with image processing,
but beginner on PyOpenGL and OpenGL.

Any advice appreciated!



From steve at holdenweb.com  Thu Aug 30 20:19:13 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 30 Aug 2007 20:19:13 -0400
Subject: wx.DirDialog defaultPath
In-Reply-To: <4BFBA39857A02A4D9C92496D7E14001901D2E5CE@blackhole.voicesignal.com>
References: <4BFBA39857A02A4D9C92496D7E14001901D2E5CE@blackhole.voicesignal.com>
Message-ID: <fb7mq6$t93$1@sea.gmane.org>

Woo, Daniel wrote:
> Is there some kind of parsing/checking that is done on the defaultPath?  
> The path I would like to set as default is something like this:
> 
> ?c:\Somedirectory\engineering\somedirectory?.  When providing this as 
> the default, the control seems to think it is an invalid path, although 
> it IS a valid path under Windows.  I?m pretty sure this is because two 
> directories in the hierarchy have the same name.  Since it believes this 
> is an invalid path, the dialog opens up browsing in the root directory.  
> I can successfully set the default to other directories, nested as deep 
> as I want and it works as expected.
> 
> Anyway around this?
> 
I think you need to revise your hypothesis about what's wrong with your 
program. There's no reason why it shouldn't be able to cope with a path 
that has a duplicate directory name at different levels.

It's *much* more likely that you aren't correctly escaping the 
back-quotes in your path. See

   http://www.ferg.org/projects/python_gotchas.html#contents_item_2

for an explanation.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From tjreedy at udel.edu  Wed Aug  8 17:07:30 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 8 Aug 2007 17:07:30 -0400
Subject: Seek the one billionth line in a file containing 3 billion lines.
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com><46b977e9$0$27390$ba4acef3@news.orange.fr>
	<5htl5qF3md0abU1@mid.uni-berlin.de>
Message-ID: <f9dbah$tfn$1@sea.gmane.org>


"Marc 'BlackJack' Rintsch" <bj_666 at gmx.net> wrote in message 
news:5htl5qF3md0abU1 at mid.uni-berlin.de...
| On Wed, 08 Aug 2007 09:54:26 +0200, M?ta-MCI \(MVP\) wrote:
|
| > Create a "index" (a file with 3,453,299,000 tuples :
| > line_number + start_byte) ; this file has fix-length lines.
| > slow, OK, but once.
|
| Why storing the line number?  The first start offset is for the first
| line, the second start offset for the second line and so on.

Somewhat ironically, given that the OP's problem stems from variable line 
lengths, this requires that the offsets by fixed length.  On a true 64-bit 
OS (not Win64, apparently) with 64-bit ints that would work great. 





From gherzig at fmed.uba.ar  Fri Aug 17 12:15:42 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Fri, 17 Aug 2007 13:15:42 -0300
Subject: advice about `correct' use of decorator
In-Reply-To: <740c3aec0708170529s6f7e7fe2l8c92771c2d0a51d4@mail.gmail.com>
References: <46C4B097.4080309@fmed.uba.ar>
	<740c3aec0708170529s6f7e7fe2l8c92771c2d0a51d4@mail.gmail.com>
Message-ID: <46C5C9AE.5020508@fmed.uba.ar>

BJ?rn Lindqvist wrote:

>On 8/16/07, Gerardo Herzig <gherzig at fmed.uba.ar> wrote:
>  
>
>>@is_logued_in
>>def change_pass():
>>    bla
>>    bla
>>
>>And so on for all the other functions who needs that the user is still
>>loged in.
>>
>>where obviosly the is_logued_in() function will determine if the dude is
>>still loged in, and THEN execute change_pass(). If the dude is not loged
>>in, change_pass() is NOT executed at all. Instead, it will be redirected
>>to the `login' screen.
>>    
>>
>
>I think this is redundant use of a decorator. You can achieve the
>exact same effect by writing:
>
>def is_logued_in():
>    if not user.is_logged_in():
>        raise NotLoggedInError
>
>It costs you one more line, but reduces complexity. And if you are
>worried about that extra line you can put it in a function.
>
>  
>
As far as i know (by the way, AFAK is the shortcut?, and BTW means `by 
the way'? ), decorators are not indispensable. I mean, all that you can 
do with python, you can doit without decorators. And from my point of 
view, this hides the complexity for the other developers of my group, 
since all they have to do is add the @is_logged_in line at the top of 
the cgi script, and not to worrie about exceptions, not even how the 
decorator is implemented (i may log the error in some file). All they 
have to know is that any abnormal situation will redirect to the `login' 
screen.

Thank you for your comments!
Gerardo


From joetech at aapt.net.au  Mon Aug 27 05:53:28 2007
From: joetech at aapt.net.au (Raptor)
Date: Mon, 27 Aug 2007 19:53:28 +1000
Subject: Let's Unite Against Jews and Mongrels!
References: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
Message-ID: <fau6t4$e10$1@news-01.bur.connect.com.au>


ra ra ra ra ra rara ra ra ra


you're so irrelevant man!!!!!!!



"Nenad Milicevic - The Aryan Serb" <i_hate_jews at shiftmail.com> wrote in 
message news:1188198797.772672.60840 at r29g2000hsg.googlegroups.com...
> Rise up and shine, white sons and daughters
> Rise up and shine, you gotta fight to part those waters
> When we swim in the light, all will be okay
> The black, yellow and brown man will wash away.
> ------------------------------
> Let's break the chains of Jewish and black domination! Unite, white
> brothers and sisters, and let's defeat those who oppress our white
> heritage!
>
> Our skin is our uniform!
>
>
> Serbian Committee for Aryan Defence
> Nenad Milicevic, executive
> Usenet name: Raoul Endymion or Raul Endymion
> ICQ 208030128
> endymion at deadspam.com
> endimion at myrealbox.com
> Belgrade, Serbia
> 




From arkanes at gmail.com  Thu Aug  2 12:34:27 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 2 Aug 2007 11:34:27 -0500
Subject: wxpython with python 2.5
In-Reply-To: <4a7f84ac0708020924v73dee05eq76d10507e3c2cad5@mail.gmail.com>
References: <4a7f84ac0708020924v73dee05eq76d10507e3c2cad5@mail.gmail.com>
Message-ID: <4866bea60708020934r2b5a7be6l2ddc931342728e62@mail.gmail.com>

On 8/2/07, G <gggg.iiiii at gmail.com> wrote:
> Hello,
>
>
>      I am trying to get wxpython to run with python 2.5 without any success.
> wx works prefectly in python 2.4. below is the error code i get when i try
> to run the code.
> File "demo.py", line 3, in <module>
>     import Main
>   File "/tmp/wxPython/Main.py", line 32, in <module>
>     import wx                  # This module uses the new wx namespace
> ImportError: No module named wx
>
> Any help in getting wxpython to run in 2.5 would be greatly appreciated.
>


Download the python 2.5 package.


From ldo at geek-central.gen.new_zealand  Tue Aug 28 01:11:32 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Tue, 28 Aug 2007 17:11:32 +1200
Subject: Chaining programs with pipe
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
	<13cnbi87neru8c3@corp.supernews.com>
	<mailman.97.1187757319.32294.python-list@python.org>
	<13cogr3n6no937b@corp.supernews.com>
	<1187795716.083417.299540@q4g2000prc.googlegroups.com>
	<fau28j$gle$3@lust.ihug.co.nz>
	<mailman.51.1188274035.28954.python-list@python.org>
Message-ID: <fb0alf$hgr$3@lust.ihug.co.nz>

In message <mailman.51.1188274035.28954.python-list at python.org>, Gabriel
Genellina wrote:

> En Mon, 27 Aug 2007 05:35:51 -0300, Lawrence D'Oliveiro
> <ldo at geek-central.gen.new_zealand> escribi?:
> 
>> In message <1187795716.083417.299540 at q4g2000prc.googlegroups.com>,
>> Gabriel Genellina wrote:
>>
>>> On 22 ago, 11:08, Grant Edwards <gra... at visi.com> wrote:
>>>
>>>> but I'm a Unix guy who occasionally tries
>>>> to ship a Windows version of a Python app: the concept of a
>>>> process defaulting to having a stderr or stdout that wasn't
>>>> writable was utterly foreign to me.
>>>
>>> Ah, that explains your previous post telling that things on Windows
>>> don't work as they "should". They work, but not necesarily as a
>>> "foreigner" would expect.
>>
>> So what's the good reason for Windows having unusable defaults for stderr
>> and stdout, then?
> 
> You should ask the wxPython/wxWidgets guys why they choose to do things
> that way.

But I assumed you knew, since you were the one who used to term "foreigner"
to describe Grant Edwards' mystification at why things worked this way. So
in fact you are equally a "foreigner" to the way Windows works?

> Tk programs don't have that problem, by example: you have a GUI
> *and* a console, if you want. A simple print statement with no console
> just goes into void space - no error, no crash, no GPF...
> You get what you ask for: if you pass /SUBSYSTEM:WINDOWS as an option to
> the linker (or put equivalent flags in the executable) you don't get a
> console by default. That's fine for most GUI programs that don't use
> stdout/stderr. If you want a console, create one using AllocConsole.

But why should I need to do that? On Unix/Linux systems, there is no
distinction between "GUI" and "non-GUI" programs--_all_ processes can (and
usually do) have stdin, stdout and stderr. stderr is particularly important
for GUI programs, so the desktop environment typically captures this to a
file, commonly called ".xsession-errors". This is very useful when things
go wrong (programs crash etc), to see what error messages were reported.

Copying text messages from a file is somewhat easier than trying to capture
them from a screenshot.


From bgoldenberg at gmail.com  Mon Aug 13 01:17:40 2007
From: bgoldenberg at gmail.com (Benjamin Goldenberg)
Date: Mon, 13 Aug 2007 05:17:40 -0000
Subject: Querying Graphics Card Name
In-Reply-To: <slrnfbuqq7.52s.grahn+nntp@frailea.sa.invalid>
References: <1186686984.160312.175270@i13g2000prf.googlegroups.com>
	<5i1f4cF3mbqqdU1@mid.individual.net>
	<1186696734.059152.131080@d30g2000prg.googlegroups.com>
	<slrnfbuqq7.52s.grahn+nntp@frailea.sa.invalid>
Message-ID: <1186982260.661135.293580@x40g2000prg.googlegroups.com>

On Aug 12, 2:18 pm, Jorgen Grahn <grahn+n... at snipabacken.dyndns.org>
wrote:
> On Thu, 09 Aug 2007 21:58:54 -0000, Benjamin Goldenberg <bgoldenb... at gmail.com> wrote:
> > On Aug 9, 3:26 pm, Bjoern Schliessmann <usenet-
> > mail-0306.20.chr0n... at spamgourmet.com> wrote:
> >> Benjamin Goldenberg wrote:
> >> > I would like to find out the name of the graphics card of the
> >> > machine my program is running on. I have looked into the pyopengl
> >> > module, and using them to query the card, but it seems like there
> >> > ought to be a simpler way to find this out without setting up a
> >> > glcontext. Does anyone have any ideas?
>
> >> You could execute glxinfo and look for the renderer string. If
> >> that's sharp enough for your purpose. Another option is lspci.
>
> > I should have clarified. I would like a cross platform implementation,
> > Windows and *nix. It doesn't seem as if glxinfo is available under
> > Windows, at least not without installing X11 under cygwin. If
> > necessary, I can write the *nix and Windows queries separately.
>
> Yeah, but ...
> - what if there isn't one?
> - what if there are several?
> - what if there *is* one, but your user is sitting by a remote machine,
>   not using the card at all?
>
> Your method will, no matter how you choose, fail sooner or later,
> so you'd better plan for that.
>
> What is your reason to do this, by the way?  Remember what Homer
> Simpson said: if something appears to be hard, it is simply not worth
> doing. And I mean that semi-seriously.

These are for some internal automation scripts for the company I work
for. We do development for specific graphics cards, all of which are
OpenGL 2.0 compatible. In order to automate aspects of our building
and testing systems, we need to know which graphics card the software
is being built on. Hopefully, that makes some sense.

-Benjamin



From claird at lairds.us  Mon Aug 13 07:04:17 2007
From: claird at lairds.us (Cameron Laird)
Date: Mon, 13 Aug 2007 11:04:17 +0000
Subject: Process Control Help
References: <1185808072.695752.20720@z28g2000prd.googlegroups.com>
	<mailman.1393.1185913913.22759.python-list@python.org>
	<1185923367.122846.117750@x40g2000prg.googlegroups.com>
Message-ID: <heq5p4-29v.ln1@lairds.us>

In article <1185923367.122846.117750 at x40g2000prg.googlegroups.com>,
Azazello  <tylerca at jeld-wen.com> wrote:
>On Jul 31, 12:45 pm, Walt Leipold <leip... at ace-net.com> wrote:
			.
			.
			.
>> It has nothing to do with 'proprietary issues'.  A lot of it has to do
>> with the perception of support -- who will support Python and custom
>> Python code if my plant shuts down?  Who will train my developers and
>> operators?  Who can I sue?  The rest of it is because of the way the
			.
			.
			.
>> You *might* save on development time (although I wouldn't bet on it),
>> but you'll lose on testing time.  Heck, you'll even lose because you
>> have to document your stuff and train people to use it -- what happens
>> to your custom system if you get hit by a bus?
			.
			.
			.
>> Yes, it's a shame that you have to buy three packages to perform three
>> functions, and then buy other 3rd-party packages to tie them together.
>> Yes, it's a shame that industrial software is expensive, and
>> proprietary, and Windows-only, and generally has a brain-dead scripting
>> language (when it has any scriptability at all).  Still, as much as it
>> galls me to say it, if your company's primary business isn't writing
>> industrial automation software, don't write industrial automation
>> software.
			.
			.
			.
>> * Unless you're a hobbyist, if you want to do data acquisition or i/o,
>> purchase an i/o server for your particular bus/instrumentation from a
>> major manufacturer.  You *can* write your own i/o server, especially for
>> simple protocols like Modbus, but the commercial versions have been
>> tested more exhaustively than you can manage.  Also, the most common
>> protocol these days is OPC, which isn't a protocol at all in the
>> conventional sense -- it's a set of APIs to a Windows DLL, with the
>> wire-level details completely opaque -- so you'd have to buy a library
>> for that anyway.
>>
>> * Unless you're a hobbyist, if you want an HMI, purchase LabView or
>> InTouch or RSView or whatever, and use their tools to draw and
>> 'configure' your screens.  (Where 'configure' generally means 'program
>> in Visual Basic or some other brain-dead language', but we try not to
>> say "program" -- customers and underwriters *hate* "custom" software.)
>>
>> I personally think it's a tragedy that every manufacturer bases its HMI
>> on Visual Basic for Applications rather than a better (and free and Open
>> Source!) language like Python.  It's also a tragedy that the dominant
>> i/o 'protocol' for industrial automation isn't really a protocol, and is
>> Windows-only to boot.  It's horrifying that the primary means of
>> communication between process control and data acquisition applications
>> is via DDE or ActiveX.  And I find it incredible that people and
>> companies will pay large sums of money for some of the industrial
>> automation products on the market.  But that's the way the industry
>> works, and, as frustrating as the commercial offerings are, using them
>> will probably be better for you and your company in the long run.
			.
			.
			.
>I really appreciate your post Walt. I started this thread last week
>and I have to admit that in the subsequent days the 'option' of using
>Python for our control solutions is simply not feasible.  Although the
>project I wanted to implement was fairly small scale, no 20 ton pieces
>or x-ray machinery, the principle of the matter remains the same,
>especially as a large corporation.  As an intern returning to school
>in the fall, the underlying responsibility for a Python system was my
>original concern and discouragement to my employer for persuing this
>path.  It became readily apparent that using the crumby software
>packaged with our control devices is surely faster in the long run, as
>we are not involved in software development.  (The majority of my
>coworkers' formal programming experience is in FORTRAN) It has been a
>very discouraging few days.  There's so much room for improvement and
>yet...  My 4-day conclusion is unless you're already involved in
>controls software you must be crazy to join.  Are many young engineers
>entering this field?
>

At an anecdotal level, I'd guess that, no, there are few
young engineers entering this field.

Mr. Leipold's descriptions of the difficulties involved 
in use of Python are accurate, and I particularly support
his advice to use whatever commercial I/O you can find.
I've had success, though, introducing high-level language
programming, and even Linux, as an alternative to vendors'
APIs, Labview, and so on.  I'm not sure how to summarize
what went into this; perhaps the best is to emphasize how
flawed is the software that's typical with vendor APIs.

While there's more to tell about the errors in commercial
networking implementations, the horror of ActiveX, and so
on, right now isn't the time for me to detail it all.


From rcdailey at gmail.com  Mon Aug 13 19:10:53 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 13 Aug 2007 18:10:53 -0500
Subject: Problem with Thread.join()
Message-ID: <496954360708131610i62c0a63aneb7c39d23a052ac0@mail.gmail.com>

Hi,

I have a class that derives from threading.Thread. To signal the thread to
exit its infinite loop, I set an Event. Once the thread checks Event.isSet()
and it is true, it proceeds to break out of the loop and exit the function.
In the main thread, right after calling Event.set(), I call Thread.join() to
wait on the thread to exit. However, if I call Thread.join() the application
locks up because for some reason calling Thread.join() prevents the thread
from exiting. I don't know why. Any help? Thanks...
-------------- next part --------------
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From kyosohma at gmail.com  Fri Aug 10 09:10:39 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 10 Aug 2007 06:10:39 -0700
Subject: wxPython before MainLoop
In-Reply-To: <13bnh5bs4b9h427@corp.supernews.com>
References: <13bl9a75laqcm70@corp.supernews.com>
	<13bnh5bs4b9h427@corp.supernews.com>
Message-ID: <1186751439.697068.306770@q3g2000prf.googlegroups.com>

On Aug 9, 8:51 pm, "[david]" <da... at nospam.spam> wrote:
> I'm disappointed that I didn't get a wxPython solution.
>
> If the only way to get wxPython to correctly handle
> this simple task is to code around it, I don't think
> wxPython is really ready for Windows.
>
> Is there a better place to ask?
>
> Regarding the suggestions:
>
> Bjoern, you're wrong. The GUI needs to be displayed
> for the user to analyse. A delay between display and
> readiness is much better than a delay before display
> or a delay with the GUI half-drawn.
>
> Mike, the screen does display correctly, it's just
> that in Windows, screen updates are not processed
> while the application is busy.
>
> 7Stud, that's a solution. Unless anyone comes up
> with a direct solution, I guess I'll have to do that.
>
> [david]
>
> [david] wrote:
> > I'd like to refresh the display before I start the main loop.
>
> > I have code like this:
>
> > app = App()
> > app.Show()
> > app.long_slow_init()
> > app.MainLoop()
>
> > The main frame partly loads at Show, but because the mainloop has not
> > started yet, the display does not update until long_slow_init() finishes.
>
> > Alternatively, I could code
>
> > app = App()
> > app.long_slow_init()
> > app.Show()
> > app.MainLoop()
>
> > Which would give me a crisp Show, but there would be a long slow wait
> > before the app showed any activity at all. I would need a splash screen.
>
> > I'd rather not have a splash screen (and I don't know how anyway). I'd
> > like to just make app.Show() finish correctly before running
> > long_slow_init.
>
> > Is there a wx internal method that I can use to give Windows the
> > opportunity to finish painting the frame before I run long_slow_init()?
>
> > Or is there a better idea?
>
> > (david)

Chris is right. The only way to interact with a gui is with a separate
thread, otherwise you're blocking the gui's mainloop thread. That's
why I gave that link. That's how to do it in every GUI I'm aware of.

Mike



From pavlovevidence at gmail.com  Thu Aug  2 22:28:31 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 03 Aug 2007 02:28:31 -0000
Subject: __call__ considered harmful or indispensable?
In-Reply-To: <mailman.1527.1186079415.22759.python-list@python.org>
References: <mailman.1527.1186079415.22759.python-list@python.org>
Message-ID: <1186108111.619578.41550@e9g2000prf.googlegroups.com>

On Aug 2, 2:30 pm, s... at pobox.com wrote:
> I'm wondering, are there some general cases where __call__ methods of
> a user-defined class are simply indispensable?

Indispensable's a strong word, but one thing that entails calling
syntax, and can't (reasonably) be done with closures is to override a
base class's __call__ method.

There is one notable type in Python that defines __call__ and that you
might want to subclass, namely type itself.  So using __call__ is
indispensible for some metaclasses.

Here's my little example.  I'm sure people could work out ways to do
it without __call__ or even a metaclass, but I doubt it'd be so
concise and out of the way as this:

class CachedResourceMetaclass(type):
    def __init__(self,name,bases,clsdict):
 
super(CachedResourceMetaclass,self).__init__(name,bases,clsdict)
        self._cache = {}
        self._releasefunc = self.release
        def decref(obj):
            obj._refcount -= 1
            if obj._refcount <= 0:
                del self._cache[obj._key]
                obj._releasefunc()
        self.release = decref
    def __call__(self,*args):
        obj = self._cache.get(args)
        if obj is not None:
            obj._refcount += 1
        else:
            obj = super(CachedResourceMetaclass,self).__call__(*args)
            obj._key = args
            obj._refcount = 1
            self._cache[args] = obj
        return obj


Carl Banks



From bjourne at gmail.com  Fri Aug 17 08:29:46 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Fri, 17 Aug 2007 14:29:46 +0200
Subject: advice about `correct' use of decorator
In-Reply-To: <46C4B097.4080309@fmed.uba.ar>
References: <46C4B097.4080309@fmed.uba.ar>
Message-ID: <740c3aec0708170529s6f7e7fe2l8c92771c2d0a51d4@mail.gmail.com>

On 8/16/07, Gerardo Herzig <gherzig at fmed.uba.ar> wrote:
> @is_logued_in
> def change_pass():
>     bla
>     bla
>
> And so on for all the other functions who needs that the user is still
> loged in.
>
> where obviosly the is_logued_in() function will determine if the dude is
> still loged in, and THEN execute change_pass(). If the dude is not loged
> in, change_pass() is NOT executed at all. Instead, it will be redirected
> to the `login' screen.

I think this is redundant use of a decorator. You can achieve the
exact same effect by writing:

def is_logued_in():
    if not user.is_logged_in():
        raise NotLoggedInError

It costs you one more line, but reduces complexity. And if you are
worried about that extra line you can put it in a function.

-- 
mvh Bj?rn


From eggie5 at gmail.com  Fri Aug 10 14:46:03 2007
From: eggie5 at gmail.com (eggie5)
Date: Fri, 10 Aug 2007 18:46:03 -0000
Subject: beginner whitespace question
In-Reply-To: <HQSui.32716$2v1.16515@newssvr14.news.prodigy.net>
References: <1186703261.136506.208660@x35g2000prf.googlegroups.com>
	<1186703525.591462.122140@m37g2000prh.googlegroups.com>
	<1186704161.334597.218750@z24g2000prh.googlegroups.com>
	<1186707164.095766.243480@q3g2000prf.googlegroups.com>
	<1186708404.901323.204730@g12g2000prg.googlegroups.com>
	<f9gf03$3al$1@daisy.noc.ucla.edu>
	<1186716319.025828.93780@g12g2000prg.googlegroups.com>
	<HQSui.32716$2v1.16515@newssvr14.news.prodigy.net>
Message-ID: <1186771563.549959.324470@q4g2000prc.googlegroups.com>

On Aug 9, 10:37 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Dan Bishop wrote:
> >> Tabs are for tables, hence the name. "Use spaces for space and use tabs
> >> for tables" can be a little mnemonic to help you remember the rules. We
> >> can make a little song together if you can think of some things that
> >> rhyme with "don't" and "use" and "tabs".
>
> > "won't"
>
> > "blues", "booze", "bruise", "choose", "cruise", "fuse", "hues",
> > "Jews", "lose", "muse", "news", "snooze", "views", etc.
>
> > "abs", "cabs", "crabs", "dabs", "grabs", "labs", "scabs", "slabs",
> > "stabs", etc.
>
> When you want to screw your whitespace--don't!
> Take this little pledge and I know you won't:
>
> When I was in school I would take of booze
> While my typing teacher said I'm free to use
> Space or formfeed or even tabs
> And I punched so hard with my pinkie that scabs
> Covered my Jake and Elwood tatoos.
> (You didn't see that one coming did yous?)

I'm so confused, I have no idea what's going on...



From mhearne808 at gmail.com  Thu Aug 30 19:18:09 2007
From: mhearne808 at gmail.com (mhearne808[insert-at-sign-here]gmail[insert-dot-here]com)
Date: Thu, 30 Aug 2007 16:18:09 -0700
Subject: fcntl problems
In-Reply-To: <1188512377.441241.107900@q4g2000prc.googlegroups.com>
References: <1188512377.441241.107900@q4g2000prc.googlegroups.com>
Message-ID: <1188515889.352267.220790@q5g2000prf.googlegroups.com>

On Aug 30, 4:19 pm, "mhearne808[insert-at-sign-here]gmail[insert-dot-
here]com" <mhearne... at gmail.com> wrote:
> I'm having a number of problems with the fcntl module.  First off, my
> system info:
>
> Mac OS X
> Darwin igskcicglthearn.cr.usgs.gov 8.10.1 Darwin Kernel Version
> 8.10.1: Wed May 23 16:33:00 PDT 2007; root:xnu-792.22.5~1/RELEASE_I386
> i386 i386
> Python 2.5.1 (built from source)
>
> OK, the weirdness:
>
> First of all, if I try this:
> file = open("counter.txt","w+")
> fcntl.flock(file.fileno(), fcntl.LOCK_NB)
>
> I get this:
> ---------------------------------------------------------------------------
> <type 'exceptions.IOError'>               Traceback (most recent call
> last)
> /Users/mhearne/src/python/<ipython console> in <module>()
> <type 'exceptions.IOError'>: [Errno 9] Bad file descriptor
>
> However, if I try this:
> fcntl.flock(file.fileno(), fcntl.LOCK_EX)
>
> I get no errors.
>
> Proceeding forward with the locked file, let's say I do the above in
> Python interactive Process A.  Then in python interactive Process B, I
> repeat the "open" function on the same file with the same
> permissions.  Then, in each process, I write some text to the file
> using the write() method.  After closing the file in both processes,
> the only text I see in the file is from Process B!
>
> According to my Python Cookbook:
> "Exclusive lock: This denies all _other_ processes both read and write
> access to the file."
>
> I seem to be experiencing the reverse of that description.  Is this my
> lack of understanding, or have I discovered a bug?
>
> Thanks,
>
> Mike

I've been doing some experiments, and here are some specific examples
to try.  I'll designate the two interactive python processes as PA and
PB.  Both processes were started in the same directory.  Here goes:
PA: import fcntl
PA: f = open("foo.txt","w+")
PA: fcntl.flock(f.fileno(),fcntl.LOCK_EX)
PA: f.write("text1\n")
PB: f = open("foo.txt","w+")
PB: f.write("text2\n")
PA: f.close()
PB: f.close()

contents of foo.txt are:
text2

Second experiment:

PA: f = open("foo.txt","w+")
PA: fcntl.flock(f.fileno(),fcntl.LOCK_EX)
PB: f = open("foo.txt","w+")
PA: f.write("text1\n")
PB: f.write("text2\n")
PA: f.write("text3\n")
PB: f.close()
PA: f.write("text4\n")
PA: f.close()

contents of foo.txt are:
text1
text3
text4

Third experiment:
PA: f = open("foo.txt","w+")
PA: fcntl.flock(f.fileno(),fcntl.LOCK_EX)
PA: f.write("text1\n")
PB: f = open("foo.txt","w+")
PB: f.write("text2\n")
PB: f.close()
PA: f.close()

contents of foo.txt are:
text1

Fourth experiment:
PA: f = open("foo.txt","w+")
PA: f.write("text1\n")
PB: f = open("foo.txt","w+")
PB: f.write("text2\n")
PB: f.close()
PA: f.close()

contents of foo.txt are:
text1

>From these last two experiments I can only conclude that file locking
isn't doing a durned thing.

What's going on?

--Mike



From david at asdf.asdf  Fri Aug 24 04:31:43 2007
From: david at asdf.asdf (bambam)
Date: Fri, 24 Aug 2007 18:31:43 +1000
Subject: beginner, idomatic python 2
References: <13csjmeaoqh9le3@corp.supernews.com>
	<46ce8d0c$0$410$426a74cc@news.free.fr>
Message-ID: <13ct5rfc3n5ug48@corp.supernews.com>

> trying to be "idiomatic"

...I hope that if a python programmer looks at my code it
won't be an excuse to discard it. Less of an issue with Python
than with C/C++, but since I'm just starting...

def device(DeviceType):
    if DeviceType=='PSP':
        return Psp()
    elif DeviceType=="Power Supply"
        return Pwr()

What about the parameter "DeviceType"?

Also, I see what you mean now, DEVICE_DICT is upper
case because it is a 'constant' -- I'd missed that point.

Steve.

"Bruno Desthuilliers" <bruno.42.desthuilliers at wtf.websiteburo.oops.com> 
wrote in message news:46ce8d0c$0$410$426a74cc at news.free.fr...
> bambam a ?crit :
>> Would someone like to suggest a replacement for this? This is a
>> function that returns different kinds of similar objects, depending
>> on what is asked for. PSP and PWR are classes.  I don't really
>> want to re-write the calling code very much: I'm just wondering
>> if the function can be replaced with some kind of OOP pattern.
>
> Dan already answered to this. Just as a side note, and since you're trying 
> to be "idiomatic", Python's naming convention is to use all_lower for 
> functions, MixedCaps for classes (except - mostly for historical reasons - 
> the builtin types...), and ALL_LOWER for symbolic (pseudo) constants.
>
>
>> def Device(DeviceType):
>>     if DeviceType=='PSP':
>>         return PSP()
>>     elif DeviceType=="Power Supply"
>>         return PWR()
>>     etc...
>>
>>
>> Thanks! 




From ldo at geek-central.gen.new_zealand  Thu Aug 30 20:54:57 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 31 Aug 2007 12:54:57 +1200
Subject: Python doesn't see the directories I create
References: <ldvBi.293202$LE1.92748@newsfe13.lga>
	<46d6856b$0$17674$426a74cc@news.free.fr>
	<mailman.133.1188471584.28954.python-list@python.org>
	<46d6a72c$0$20532$426a74cc@news.free.fr>
	<mailman.134.1188473377.28954.python-list@python.org>
	<5jns3vFdmbcU6@mid.uni-berlin.de>
Message-ID: <fb7ood$jb7$1@lust.ihug.co.nz>

In message <5jns3vFdmbcU6 at mid.uni-berlin.de>, Marc 'BlackJack' Rintsch
wrote:

> Even on Unix it shouldn't be a problem on most file systems to create a
> directory named 'C:'

Except that some commands (e.g. scp, rsync) will interpret the colon as
delimiting a host name.

Also remember that, unless you write it "/C:", it's only going to be
interpreted relative to your current working directory.


From skawaii at gmail.com  Mon Aug 27 14:54:30 2007
From: skawaii at gmail.com (skawaii at gmail.com)
Date: Mon, 27 Aug 2007 18:54:30 -0000
Subject: [PyQt] Help on resizing a custom widget
Message-ID: <1188240870.457859.207670@57g2000hsv.googlegroups.com>

Ok, here's what's going on. I've just created a custom widget. it
works great. I'm having some trouble, however, figuring out how to
allow the said widget to resize. For example, when I throw the widget
into a new dialog (using Qt Designer), I want to be able to drag it
larger/smaller and have widget expand/shrink to that size. Right now,
I can drag the widget bigger/smaller all I want, but it doesn't
actually change size.

I'm pretty new to PyQt (and therefore, Qt), so I'm pretty sure that
the answer is a property that needs to be set somewhere. I'm just not
sure which one. So you know, I'm using Python 2.4.3 and PyQt 3.1.6.

Any help and suggestions would be appreciated. Thanks.



From rcdailey at gmail.com  Fri Aug 17 15:11:54 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Fri, 17 Aug 2007 14:11:54 -0500
Subject: Problem with directory recursion!
In-Reply-To: <496954360708171119g66564ecas3134aed0b3916f8@mail.gmail.com>
References: <496954360708171116t4370c2ddra3d7905bc956c7eb@mail.gmail.com>
	<496954360708171119g66564ecas3134aed0b3916f8@mail.gmail.com>
Message-ID: <496954360708171211t74a19a8j636ffb7a0f272d77@mail.gmail.com>

I figured it out.

I was doing a recursive function call when I didn't have to. The walk()
method already walks into every possible sub-directory for you!

On 8/17/07, Robert Dailey <rcdailey at gmail.com> wrote:
>
> Here's part of the output that's incorrect:
>
> models\W_BoomerEdge
>         BYOS_C.entity.xml
>         BYOS_C_Collision.entity.xml
>
> Notice that the file BYOS_C.entity.xml is showing up as a file in the
> directory W_BoomerEdge. This file does not exist in this folder, but yet in
> a different folder. The output is consistent with the 'print' statements you
> will see in the function I posted earlier.
>
> On 8/17/07, Robert Dailey <rcdailey at gmail.com> wrote:
> >
> > Hi,
> >
> > I've created a function that is used to recurse a directory tree in
> > Windows XP using os.walk(). For the most part it works, however in some
> > instances the data is incorrect and I'm getting invalid sub-directory paths.
> > Here's the function:
> >
> >
> > def __doSearch( root_dir, sub_path, restype, ext ):
> >     print sub_path
> >     # Searches the specified directory and generates a
> >     # list of files to preload.
> >     complete_path = osp.normpath( osp.join( root_dir, sub_path ) )
> >     for root, dirs, files in os.walk( complete_path ):
> >
> >         # Record the list of file hash ID's
> >         for file in files:
> >             split = __resType( file )
> >             if split[1] == restype:
> > #                print sub_path
> >                 print "\t", file
> >                 __appendResource( ext, sub_path, split[0] )
> >
> >         # Remove .svn subdirectories; we don't walk these.
> >         if ".svn" in dirs:
> >             dirs.remove( ".svn" )
> >
> >         # Recurse child directories
> >         for dir in dirs:
> >             __doSearch( root_dir, osp.join( sub_path, dir ), restype,
> > ext )
> >
> > Does anyone see anything immediately suspicious about the code? I'm
> > assuming that in Python, every time a function is called recursively it gets
> > its own copy of local variables. For some reason the sub_path variable isn't
> > consistent depending on where I use it. For example, if you notice the print
> > call at the very start of the function, it will output something like
> > "models/ships". However, after passing it into __appendResource(), it
> > appears to be just "models".
> >
>
>
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From michele.simionato at gmail.com  Tue Aug 21 09:35:58 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Tue, 21 Aug 2007 13:35:58 -0000
Subject: restoring the default completer in IPython
Message-ID: <1187703358.454773.72960@50g2000hsm.googlegroups.com>

This should probably go to the IPython list, but since I am not
subscribed I will try my luck here.
Basically, I want to embed IPython inside a command line interpreter
based on cmd.Cmd, in this
way:

import cmd, IPython

class Cmd(cmd.Cmd):
    def do_ipython(self, arg):
        ipython = IPython.Shell.IPShellEmbed()
        ipython(global_ns=globals())
    def do_EOF(self, arg):
        return 1

Cmd().cmdloop()

It works, however when I exit from the IPython shell (after giving the
ipython command) the Cmd
class is still using the IPython readline completer, not the original
one. By looking at the source
code of IPShellEmbed I see that there is a
method .restore_system_completer() which is
called, but it seems to be not working. I am probably doing something
wrong, can somebody knowledgeable on IPython internals share some
light on that? TIA,

      Michele Simionato



From hniksic at xemacs.org  Tue Aug 21 10:28:19 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Tue, 21 Aug 2007 16:28:19 +0200
Subject: python 2.5.1 segfault, multithreading & dual core issue?
References: <46caf049$0$239$e4fe514c@news.xs4all.nl>
Message-ID: <87r6lxx8qk.fsf@mulj.homelinux.net>

Paul Sijben <paul.sijben at xs4all.nl> writes:

> I am running a multi-threaded python application in a dual core
> intel running Ubuntu.
[...]

Judging from the stack trace, this patch has a good chance of fixing
your problem:

    http://mail.python.org/pipermail/python-dev/2007-August/074232.html


From paddy3118 at googlemail.com  Mon Aug 20 12:52:34 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Mon, 20 Aug 2007 16:52:34 -0000
Subject: yet another indentation proposal
In-Reply-To: <1i335jn.g5ymo519vckxfN%aleax@mac.com>
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
	<1187538922.849174.94870@19g2000hsx.googlegroups.com>
	<1i335jn.g5ymo519vckxfN%aleax@mac.com>
Message-ID: <1187628754.033003.113900@22g2000hsm.googlegroups.com>

On Aug 19, 5:22 pm, al... at mac.com (Alex Martelli) wrote:
> Paddy <paddy3... at googlemail.com> wrote:
>
>    ...
>
> > Can screen reaaderss be customized?
>
> Open-source ones surely can (e.g., NVDA is an open-source reader for
> Windows written in Python, <http://www.nvda-project.org/> -- alas, if
> you search for NVDA Google appears to be totally convinced you mean
> NVidia instead, making searches pretty useless, sigh).
>
> > Maybe their is a way to get the screen reader to say indent and dedent
> > at thee appropriate places?
>
> There definitely should be.
>
> > Or maybe a filter to put those wordds into the source?
>
> .../Tools/scripts/pindent.py (comes with the Python source distribution,
> and I hope that, like the whole Tools directory, it would also come with
> any sensible packaged Python distribution) should already be sufficient
> for this particular task.  The "indent" always happens (in correct
> Python sources) on the next line after one ending with a colon;
> pindent.py can add or remove "block-closing comments" at each dedent
> (e.g., "# end for" if the dedent is terminating a for-statement), and
> can adjust the indentation to make it correct if given a Python source
> with such block-closing comments but messed-up indentation.
>
> Alex

Aaron, here's the comment at the beginning of the script. Would it
work for you?

# This file contains a class and a main program that perform three
# related (though complimentary) formatting operations on Python
# programs.  When called as "pindent -c", it takes a valid Python
# program as input and outputs a version augmented with block-closing
# comments.  When called as "pindent -d", it assumes its input is a
# Python program with block-closing comments and outputs a commentless
# version.   When called as "pindent -r" it assumes its input is a
# Python program with block-closing comments but with its indentation
# messed up, and outputs a properly indented version.

# A "block-closing comment" is a comment of the form '# end <keyword>'
# where <keyword> is the keyword that opened the block.  If the
# opening keyword is 'def' or 'class', the function or class name may
# be repeated in the block-closing comment as well.  Here is an
# example of a program fully augmented with block-closing comments:

# def foobar(a, b):
#    if a == b:
#        a = a+1
#    elif a < b:
#        b = b-1
#        if b > a: a = a-1
#        # end if
#    else:
#        print 'oops!'
#    # end if
# # end def foobar

# Note that only the last part of an if...elif...else... block needs a
# block-closing comment; the same is true for other compound
# statements (e.g. try...except).  Also note that "short-form" blocks
# like the second 'if' in the example must be closed as well;
# otherwise the 'else' in the example would be ambiguous (remember
# that indentation is not significant when interpreting block-closing
# comments).

# The operations are idempotent (i.e. applied to their own output
# they yield an identical result).  Running first "pindent -c" and
# then "pindent -r" on a valid Python program produces a program that
# is semantically identical to the input (though its indentation may
# be different). Running "pindent -e" on that output produces a
# program that only differs from the original in indentation.

# Other options:
# -s stepsize: set the indentation step size (default 8)
# -t tabsize : set the number of spaces a tab character is worth
(default 8)
# -e         : expand TABs into spaces
# file ...   : input file(s) (default standard input)
# The results always go to standard output

# Caveats:
# - comments ending in a backslash will be mistaken for continued
lines
# - continuations using backslash are always left unchanged
# - continuations inside parentheses are not extra indented by -r
#   but must be indented for -c to work correctly (this breaks
#   idempotency!)
# - continued lines inside triple-quoted strings are totally garbled

# Secret feature:
# - On input, a block may also be closed with an "end statement" --
#   this is a block-closing comment without the '#' sign.

# Possible improvements:
# - check syntax based on transitions in 'next' table
# - better error reporting
# - better error recovery
# - check identifier after class/def

# The following wishes need a more complete tokenization of the
source:
# - Don't get fooled by comments ending in backslash
# - reindent continuation lines indicated by backslash
# - handle continuation lines inside parentheses/braces/brackets
# - handle triple quoted strings spanning lines
# - realign comments
# - optionally do much more thorough reformatting, a la C indent

-Paddy



From jcd at sdf.lonestar.org  Fri Aug 24 09:31:39 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 24 Aug 2007 09:31:39 -0400
Subject: creating a tar file with python
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
Message-ID: <46CEDDBB.7000806@sdf.lonestar.org>

Brian McCann wrote:
> Hi,
>  
> I'm trying to create a tar file of the contents of the current directory
>  
> right now there is only one file "text.xml" in the current dir,  I'm 
> using"." current dir as source
> but that gives syntax error
>
> any help would be greatly appreciated
> --Brian
>  
>  
> #!/usr/bin/python
> import string
> import os
> import sys
> import time
> import errno
> import shutil
> import tarfile
>  
>
> tar = tarfile.open(.,"test.tar.gz", "w:gz)
>  
Over the course of this thread, I found the following variations on one 
line of code.

Original problem code:   tar = tarfile.open(.,"test.tar.gz", "w:gz)
(missing quotes around arg[0], and at the end of arg[2])

SH's First solution:    tar = tarfile(".", "test.tar.gz", "w:gz")
(quotes around everything, and tarfile.open() becomes tarfile())

OP's attempt at implementing 1st solution:    tar = 
tarfile.open(".","test.tar.gz",w:gz)
(now the quotes are entirely missing around arg[2])

SH's concatenation into file what\ I\ wrote:  tar = tarfile(".", 
"test.tar.gz", w:gz")
(suddenly the quotes are missing from the beginning of arg[2])

Result from SH's diff: > tar = tarfile(".", "test.tar.gz", "w:gz")
(the quotes have magically returned).

Then the conversation devolves into grouchiness on both sides, until JM 
steps in with an entirely new solution. 

Sheesh.  Both of y'all needed to pay more attention to detail.  This is 
*one* line of code folks.  Better yet, get a decent editor that will do 
syntax highlighting, so you don't need to pay attention.  If quotes 
don't close, you need to know that.  Train yourself so that looking for 
unclosed quotes, parens, brackets, etc. becomes second nature.  And make 
sure you quote ALL strings.  Some languages are forgiving on this 
count.  Python is not.

Blessings to all, and may all find their good cheer restored by some 
rest.  I offer you both a virtual pint.  You seem like you could use it.

Cheers,
Cliff


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From kar1107 at gmail.com  Wed Aug  1 19:10:05 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Wed, 01 Aug 2007 16:10:05 -0700
Subject: split a string of space separated substrings - elegant solution?
In-Reply-To: <46B03940.8020105@igpm.rwth-aachen.de>
References: <46af9beb$0$14242$ba620e4c@news.skynet.be>
	<1185941803.577841.178550@l70g2000hse.googlegroups.com>
	<46B03940.8020105@igpm.rwth-aachen.de>
Message-ID: <1186009805.678439.298450@i13g2000prf.googlegroups.com>

On Aug 1, 12:41 am, Helmut Jarausch <jarau... at igpm.rwth-aachen.de>
wrote:
> Many thanks to all of you!
> It's amazing how many elegant solutions there are in Python.

Here is yet another solution.

pexpect.split_command_line()

>From the documentation:
split_command_line(command_line)
    This splits a command line into a list of arguments.
    It splits arguments on spaces, but handles
    embedded quotes, doublequotes, and escaped characters.
    It's impossible to do this with a regular expression, so
    I wrote a little state machine to parse the command line.

http://pexpect.sourceforge.net/pexpect.html

But I am surprised to see there is a standard module already doing
this (shlex)

Karthik
>
> --
> Helmut Jarausch
>
> Lehrstuhl fuer Numerische Mathematik
> RWTH - Aachen University
> D 52056 Aachen, Germany




From edreamleo at charter.net  Fri Aug 10 12:04:47 2007
From: edreamleo at charter.net (Edward K Ream)
Date: Fri, 10 Aug 2007 11:04:47 -0500
Subject: Leo 4.4.4 beta 1 released
Message-ID: <Q00vi.5$Kb1.3@newsfe06.lga>

Leo 4.4.4 beta is available at:
http://sourceforge.net/project/showfiles.php?group_id=3458&package_id=29106

Leo is a text editor, data organizer, project manager and much more. See:
http://webpages.charter.net/edreamleo/intro.html

The highlights of Leo 4.4.4:
----------------------------
- A threading_colorizer plugin replaces the __jEdit_colorizer__ plugin. 
This plugin features much better performance.

- Support for @auto nodes.  Such nodes allow people to collaborate using Leo 
without inserting Leo sentinels in the files Leo generates.

Links:
------
Leo:      http://webpages.charter.net/edreamleo/front.html
Home:     http://sourceforge.net/projects/leo/
Download: http://sourceforge.net/project/showfiles.php?group_id=3458
CVS:      http://leo.tigris.org/source/browse/leo/
Quotes:   http://webpages.charter.net/edreamleo/testimonials.html

--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at yahoo.com
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  9 10:00:24 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 09 Aug 2007 16:00:24 +0200
Subject: Stackless Integration
In-Reply-To: <mailman.1786.1186660119.22759.python-list@python.org>
References: <mailman.1786.1186660119.22759.python-list@python.org>
Message-ID: <46bb1df0$0$403$426a74cc@news.free.fr>

Jean-Paul Calderone a ?crit :
> On Thu, 09 Aug 2007 09:00:27 -0000, "Justin T." <jmtulloss at gmail.com> 
> wrote:
>> Hi,
>>
>> I've been looking at stackless python a little bit, and it's awesome.
>> My question is, why hasn't it been integrated into the upstream python
>> tree? Does it cause problems with the current C-extensions? It seems
>> like if something is fully compatible and better, then it would be
>> adopted. However, it hasn't been in what appears to be 7 years of
>> existence, so I assume there's a reason.
> 
> It's not Pythonic.

Hum... Yes ? Really ? Care to argument ?


From grante at visi.com  Thu Aug 23 13:53:07 2007
From: grante at visi.com (Grant Edwards)
Date: Thu, 23 Aug 2007 17:53:07 -0000
Subject: Socket recv(1) seems to block instead of returning end of file.
References: <mailman.164.1187862959.32294.python-list@python.org>
	<pan.2007.08.23.16.48.52.958428@datallegro.com>
Message-ID: <13cric35jcjp336@corp.supernews.com>

On 2007-08-23, Dan Stromberg - Datallegro <dstromberg at datallegro.com> wrote:

> Are you using sock.settimeout()?

Hey, somebody snuck timeouts into the socket module when I wasn't
looking...

> I agree with Grant though - posting a minimal snippet of code that
> replicates the problem would help us help you.  In fact, it might help you
> help yourself :)

Yup, in my experience attempting to produce a minimally failing
example will usually reveal what's wrong.

-- 
Grant Edwards                   grante             Yow! I have seen these EGG
                                  at               EXTENDERS in my Supermarket
                               visi.com            ... I have read the
                                                   INSTRUCTIONS ...


From wescpy at gmail.com  Thu Aug 23 11:27:24 2007
From: wescpy at gmail.com (wesley chun)
Date: Thu, 23 Aug 2007 08:27:24 -0700
Subject: [ANN] Python courses this Fall
In-Reply-To: <20070823.011932.12838.0@webmail31.lax.untd.com>
References: <20070823.011932.12838.0@webmail31.lax.untd.com>
Message-ID: <78b3a9580708230827sb171216l3a0eb8c96ff1f2ad@mail.gmail.com>

$1295/pp for the intro course and $495/ for the 1-day course (but $395
if you take the intro course too).

http://cyberwebconsulting.com (click "Python Training") for more details

-wesley


On 8/23/07, Jeff Pang <pangj at juno.com> wrote:
> Sounds good.How about the costs for those lessons?thanks.
>
>> WEB:   http://cyberwebconsulting.com (click "Python Training")
>> See website for costs, venue info, and registration.  Discounts are
> available for multiple registrations as well as for teachers/students.


From gherzig at fmed.uba.ar  Thu Aug 16 15:58:55 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Thu, 16 Aug 2007 16:58:55 -0300
Subject: Help me!!
In-Reply-To: <1187291279.545324.205610@i38g2000prf.googlegroups.com>
References: <1187291279.545324.205610@i38g2000prf.googlegroups.com>
Message-ID: <46C4AC7F.6000201@fmed.uba.ar>

Anhoter HURRA for list comprehensions:
 >>> a = ['a', 'b', 'c', 'd']
 >>> b = ['a','c']
 >>> [x in b and x.upper() or x for x in a]
['A', 'b', 'C', 'd']

Is what you want?
Cheers

Gerardo

>I'm trying to compare the list with another list and if it is there in
>both I'm changing it to upper case and adding to another list and if
>its not there in both I just want to add it to the global list (ie
>files).
>I'm able to do the first part but when I'm doing the second part the
>files which are not there in both are getting repeatedly into the
>global file. Some one help me so that
>If ab = [a,b,c,d]
>and cd = [a,c]
>my global list file should be [A,b,C,d]
>
>  
>



From wpdster at gmail.com  Mon Aug  6 10:06:51 2007
From: wpdster at gmail.com (Patrick Doyle)
Date: Mon, 6 Aug 2007 10:06:51 -0400
Subject: Importing * From a Package
Message-ID: <e2a1d0aa0708060706p1f50d5c1j93b6cc3679522597@mail.gmail.com>

Reading through the Python tutorial, I got to section 6.4.1,
"Importing * From a Package", which states:

"If __all__ is not defined, the statement from Sound.Effects import *
does not import all submodules from the package Sound.Effects into the
current namespace; ..."

It then goes on to state:

"[It] imports whatever names are defined in the package [including]
any submodules of the package that were explicitly loaded by previous
import statements."

I am curious to learn the rationale for this behavior, since it just
caught me by surprise (hence the reason I was pouring over the
tutorial document in such detail :-))

Thus far, everything in Python has seemed very intuitive to me,
however the behavior of "from package import *" baffles me.

So I figured I'd ask -- why does Python behave this way.

(And now, I'm going to do some code cleanup :-))

--wpd


From kyosohma at gmail.com  Thu Aug 30 15:07:02 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 30 Aug 2007 12:07:02 -0700
Subject: create Powerpoint via com
In-Reply-To: <j7EBi.13372$Yg.7724@trnddc02>
References: <j7EBi.13372$Yg.7724@trnddc02>
Message-ID: <1188500822.869925.194430@e9g2000prf.googlegroups.com>

Alan,

On Aug 30, 1:37 pm, Alan Isaac <ais... at american.edu> wrote:
> Can someone point me to a simple example
> or better yet tutorial for creating
> a Powerpoint using Python.
>
> Thanks,
> Alan Isaac

You should check our the following for information on using COM
itself:

http://www.oreilly.com/catalog/pythonwin32/chapter/ch12.html

Core Python Programming by Chun has an example in it using Tkinter. I
did it a while back, so here's the source:


<code>

# Core Python Chp 23, pg 994
# ppoint.pyw

from Tkinter import Tk
from time import sleep
from tkMessageBox import showwarning
import win32com.client as win32

warn = lambda app: showwarning(app, 'Exit?')
RANGE = range(3, 8)

def ppoint():
    app = 'PowerPoint'
    ppoint = win32.gencache.EnsureDispatch('%s.Application' % app)
    pres = ppoint.Presentations.Add()
    ppoint.Visible = True

    s1 = pres.Slides.Add(1, win32.constants.ppLayoutText)
    sleep(1)
    sla = s1.Shapes[0].TextFrame.TextRange
    sla.Text = 'Python-to-%s Demo' % app
    sleep(1)
    slb = s1.Shapes[1].TextFrame.TextRange
    for i in RANGE:
        slb.InsertAfter("Line %d\r\n" % i)
        sleep(1)
    slb.InsertAfter("\r\nTh-th-th-that's all folks!\r\n")

    warn(app)
    pres.Close()
    ppoint.Quit()

if __name__ == '__main__':
    Tk().withdraw()
    ppoint()

</code>

I recommend getting ActiveState's Python distro as it comes with an
IDE that can browse COM objects fairly easily.

Hope that helps!

Mike



From BjornSteinarFjeldPettersen at gmail.com  Sun Aug 19 19:06:39 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Sun, 19 Aug 2007 23:06:39 -0000
Subject: Latest models of Gibson guitars
In-Reply-To: <1187548916.909340.37420@k79g2000hse.googlegroups.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<1187548916.909340.37420@k79g2000hse.googlegroups.com>
Message-ID: <1187564799.265981.75740@o80g2000hse.googlegroups.com>

On Aug 19, 8:41 pm, vedrandeko... at v-programs.com wrote:
> On 19 kol, 19:34, mobile... at gmail.com wrote:
>
[spam]
>
> Hello,
>
> This is  a newsgroup of programming language Python, stop with this!
>
> Regards,
> Vedran

As someone else pointed out, this is more widely disseminated than
just c.l.py. If you feel the need to do something about the post, and
you're using Google groups, there's a "More options" link in the top
right corner of every post where you can report it as spam. That might
be marginally more effective than trying to chastise a spammer for
being off-topic (it's what they do) -- at least it won't degrade the
signal/noise ratio further.

-- bjorn



From seem at gazeta.pl  Fri Aug  3 16:49:16 2007
From: seem at gazeta.pl (Lukasz)
Date: Fri, 03 Aug 2007 22:49:16 +0200
Subject: Eclipse and Python
In-Reply-To: <59f9c5160708030922m2f4f5179nf384135214246d14@mail.gmail.com>
References: <59f9c5160708030922m2f4f5179nf384135214246d14@mail.gmail.com>
Message-ID: <46B394CC.6080904@gazeta.pl>

U?ytkownik Danyelle Gragsone napisa?:
> Does anyone have any suggested websites for learning Eclipse the python way?
> 
> thanks,
> Danyelle

http://www.showmedo.com/videos/series?name=PyDevEclipseList


--
Opole - Miasto Bez Granic.
http://www.opole.pl - tu znajdziesz nowe miejsca, nowe mozliwosci, nowe inspiracje...




From rcdailey at gmail.com  Tue Aug 21 12:27:21 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 21 Aug 2007 11:27:21 -0500
Subject: Python is removing my quotes!
In-Reply-To: <46CB0E29.2010306@islandtraining.com>
References: <496954360708210900p6da42670o3a28d6b0dbd4c524@mail.gmail.com>
	<46CB0E29.2010306@islandtraining.com>
Message-ID: <496954360708210927w10655bbdtc977aace232bf05d@mail.gmail.com>

Thank you for your response. The back slashes work! It's a bit annoying; but
I have Microsoft to thank for that.

On 8/21/07, Gary Herron <gherron at islandtraining.com> wrote:
>
> Robert Dailey wrote:
> > Hi,
> >
> > Note: I'm using Python on Windows
> >
> > I have an application that allows a user to submit a password as a
> > command line parameter. The password of choice may contain any
> > characters the user wishes, including quotes. If I do the following:
> >
> > python password.py "9999"MyPassword
> >
> > The resulting output when I print this inside the script is:
> >
> > 9999MyPassword
> >
> > Notice how the quotations have been stripped. Is it DOS doing this, or
> > Python? Is there a way I can fix it?
> >
> > Thanks.
>
> Not Python.  It never even sees those quotes.  Whatever system you are
> using for entering the text is stripping them.  Is it the command prompt
> (cmd.exe)?  If so then you can escape the quote by preceding it with a
> backslash.  (This is true of the DOS prompt and all the unix shells, and
> their windows ports, that I know about.)
>
> Gary Herron
>
>
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From steveo at syslang.net  Thu Aug 23 16:55:21 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Thu, 23 Aug 2007 16:55:21 -0400 (EDT)
Subject: Redo: Problem with dynamic creation of classes.
Message-ID: <alpine.LFD.0.999.0708231654210.1598@saturn.syslang.net>

Sorry, I had a small description problem. It's corrected below.

I have a base class B and a derived class D which inherits from B. I also
have a D2 class which inherits from D. D is used as a base class for most
of my generated classes. I have a "special" class which inherits from D2
because I need to override a couple of its methods. Anything based on D 
will inherit Encode and Decode from B.

class D(b.B):
      def __init__(self, data, timestamp = None):
          b.B.__init__(self, data)
          self.timestamp = timestamp

class D2( D ):
      def __init__(self, data, timestamp = None):
          DS.__init__(self, data, timestamp)
      def Decode(self):
          pass
      def Encode(self):
  	pass

The generated classes come from this loop:

      for m in mdefs:
          mdef = mdefs[m]
          name = mdef['name'] + fbase
          if mdef.has_key('baseclass'):
              base_class_seq = mdef['baseclass']
          else:
              base_class_seq = DEFAULT_BASE_CLASS
          nclass = new.classobj( name, base_class_seq, globals() )

base_class_seq is either going to be (D,) or (D2,)

After I get through the class generation, I want to say
      globals()['IFRAMED2'].Decode = dynDecode
      globals()['IFRAMED2'].Encode = dynEncode
for the one class that inherited from D2. If I do that, I find that *all*
classes that call Encode or Decode are all calling dyn{En,De}code (which
is exactly what I *don't* want).

So I looked at the id values after class generation.

      print 'IFRAMED2.Encode = ', IFRAMED2.Encode, id(IFRAMED2.Encode)
      print 'SNRMD.Encode = ', SNRMD.Encode, id(SNRMD.Encode)
      print 'IFRAMED2 = ', IFRAMED2, id(IFRAMED2)
      print 'SNRMD = ', SNRMD, id(SNRMD)
      IFRAMED2.Decode = dynDecode
      IFRAMED2.Encode = dynEncode
      print 'IFRAMED2.Encode = ', IFRAMED2.Encode, id(IFRAMED2.Encode)
      print 'SNRMD.Encode = ', SNRMD.Encode, id(SNRMD.Encode)

Here's the output:

IFRAMED2.Encode =  <unbound method IFRAMED2.Encode> 1100623660
SNRMD.Encode =  <unbound method SNRMD.Encode> 1100623660
IFRAMED2 =  d.IFRAMED2 1076299644
SNRMD =  d.SNRMD 1103202364
IFRAMED2.Encode =  <unbound method IFRAMED2.dynEncode> 1100623660
SNRMD.Encode =  <unbound method SNRMD.dynEncode> 1100623660

So it looks like the IFRAMED2 class which inherits from D2 is starting out
with the same id value for Encode as SNRMD which inherits from D, even
though D2 defines its own Encode method.

Is it me of is it the interpreter doing something wrong?

--
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net
--
http://mail.python.org/mailman/listinfo/python-list


From steve at holdenweb.com  Sun Aug 19 20:37:29 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 19 Aug 2007 20:37:29 -0400
Subject: "Variable variable name" or "variable lvalue"
In-Reply-To: <46C8796F.8090505@islandtraining.com>
References: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>	<1187541583.607550.107230@57g2000hsv.googlegroups.com>
	<46C8796F.8090505@islandtraining.com>
Message-ID: <faannv$o18$1@sea.gmane.org>

Gary Herron wrote:
> inmmike at gmail.com wrote:
>> On Aug 15, 1:42 pm, mfglinux <mfgli... at gmail.com> wrote:
>>   
>>> Hello to everybody
>>>
>>> I would like to know how to declare in python a "variable name" that
>>> it is in turn a variable
>>> In bash shell I would wrote sthg like:
>>>
>>> for x in `seq 1 3`
>>> do
>>>   M$i=Material(x)  #Material is a python class
>>> done
>>>
>>> Why I need this? Cause I have a python module that obliges me to build
>>> a variable called Period, which should have a variable name of
>>> summands (depends on the value of x)
>>>
>>> #Let's say x=3, then Period definition is
>>> Period=Slab(Material1(12.5)+Material2(25)+Material3(12.5)) #Slab is a
>>> python class
>>>
>>> I dont know how to automatize last piece of code for any x
>>>
>>> thank you
>>>
>>> Marcos
>>>     
>> Regardless of whether or not this is a "best practice" sometimes it is
>> necessary. For example, I am looping through a dictionary to set some
>> class properties. Anyway, here is what I finally came up with:
>>
>> exec "self.%s = '%s'" % (item, plist[item])
>>   
> Yuck!  Not at all necessary.  Use setattr instead:
> 
>    setattr(self, item, plist[item])
> 
> That's much cleaner then an exec or eval.  You may also find getattr and
> hasattr useful.
> 
Or even, in some cases,

     self.__dict__.update(otherdict)

if you have a dictionary of stuff to put into an object.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From kyosohma at gmail.com  Mon Aug  6 14:34:01 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 06 Aug 2007 18:34:01 -0000
Subject: Tkinter or wxpython?
In-Reply-To: <46B75F31.9070208@codebykevin.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<46B73DE4.6040405@codebykevin.com>
	<1186421115.402000.88080@x35g2000prf.googlegroups.com>
	<46B75F31.9070208@codebykevin.com>
Message-ID: <1186425241.246492.144340@d30g2000prg.googlegroups.com>

On Aug 6, 12:49 pm, Kevin Walzer <k... at codebykevin.com> wrote:
> kyoso... at gmail.com wrote:
>
> > I tried the PMW widget toolkit. It was ok, but it seemed kind of
> > buggy. I found out about Tix on a forum of some sort. When I tried to
> > find out how to get it and use it, all I found was conflicting
> > information. I finally got it downloaded only to find I had to compile
> > it and I didn't have the right version of TCL. So I switched to
> > wxPython then. Months later I found out that Tix is now included with
> > Python.
>
> > I still don't know how to use it though. As with most external Tkinter
> > widget sets, Tix doesn't have examples. The docs look less inviting
> > than man pages...but I realize that's probably just me. I just don't
> > like man pages much.
>
> Tkinter comes more naturally to me than other toolkits because I'm also
> a Tcl developer. I just haven't felt the need to learn wxPython because
> I can get what I need from Tkinter, even the more complicated GUI layouts.
>
> --
> Kevin Walzer
> Code by Kevinhttp://www.codebykevin.com

Yeah...I would assume I would enjoy Tkinter more if I knew more tcl.
Until that day arrives though, it will probably still be fairly
confusing for me to figure out. I do like it's "pythonic" style
though.

Mike



From sdeibel at gmail.com  Thu Aug  2 10:50:31 2007
From: sdeibel at gmail.com (sdeibel at gmail.com)
Date: Thu, 02 Aug 2007 07:50:31 -0700
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <mailman.1453.1186004775.22759.python-list@python.org>
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
	<mailman.1453.1186004775.22759.python-list@python.org>
Message-ID: <1186066231.229502.133040@57g2000hsv.googlegroups.com>

On Aug 1, 5:45 pm, "Joshua J. Kugler" <jos... at eeinternet.com> wrote:
> I tend to let questions slide when they are answered in the documentation or
> on the web site.  Maybe theWingdevelopers/support personnel are the same
> way.

Just to clarify:  We never do that.  If you don't hear from us in
response to a
question, something has gone wrong (either we didn't get your email or
ours got filtered).

In this case, there was a typo in the reply-to email message and I
didn't manage
to figure out the correct email address to reply to until now.

Stephan Deibel
Wingware



From sentientholon at gmail.com  Wed Aug 22 12:09:39 2007
From: sentientholon at gmail.com (Frederick Polgardy)
Date: Wed, 22 Aug 2007 16:09:39 -0000
Subject: Eval and raw string ??
In-Reply-To: <1187798806.029598.264740@q3g2000prf.googlegroups.com>
References: <1187798806.029598.264740@q3g2000prf.googlegroups.com>
Message-ID: <1187798979.244766.257370@e9g2000prf.googlegroups.com>

On Aug 22, 11:06 am, Mark <cree... at gmail.com> wrote:
> Eval() doesn't seem to recognize the r'string' format. Is there a way
> around this.
> Example:
> If I input: ---------> eval("r'C:\tklll\ndfd\bll'")
> I get the output:
>
> Traceback (most recent call last):
>   File "<pyshell#3>", line 1, in <module>
>     eval("r'C:\tklll\ndfd\bll'")
>   File "<string>", line 1
>     r'C:        klll
>             ^
> SyntaxError: EOL while scanning single-quoted string
>
> The same principle applies for exec.
>
> Thanks in advance,
> Mark

The r'' format is purely for the interpreter; eval wouldn't know the
difference.

Your problem is that eval and exec evaluate source.  You're trying to
do execfile().

Fred



From steve at holdenweb.com  Thu Aug 30 07:28:52 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 30 Aug 2007 07:28:52 -0400
Subject: Python doesn't see the directories I create
In-Reply-To: <46d6a72c$0$20532$426a74cc@news.free.fr>
References: <ldvBi.293202$LE1.92748@newsfe13.lga>	<46d6856b$0$17674$426a74cc@news.free.fr>	<mailman.133.1188471584.28954.python-list@python.org>
	<46d6a72c$0$20532$426a74cc@news.free.fr>
Message-ID: <fb69lm$gr$1@sea.gmane.org>

Bruno Desthuilliers wrote:
> Steve Holden a ?crit :
>> Bruno Desthuilliers wrote:
[...]
>> That does indeed work in most situations, but ideally (i.e. for maximum 
>> code portability) paths should be constructed using os.path.join(), or 
>> collected from the environment somehow.
> 
> Indeed. But I doubt a path starting with 'C:' will work fine on a 
> unix-like environment anyway !-)

Just to be contrarian:

sholden at bigboy ~/Projects/python.org/build
$ ls C:/Steve/
Apache                          SANSsecurityOverview.pdf
Apache2                         SQLServer.txt
     ...
Resume.odt                      todo.txt
Resume.pdf                      untitled-1.py

sholden at bigboy ~/Projects/python.org/build

That's Cygwin, of course. Is that sufficiently "unix-like"? Though I 
have to admit that the different utilities all take different approaches 
to the use of Windows paths, and some just won't take them at all.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From eric at abrahamsen.com  Wed Aug 22 03:45:05 2007
From: eric at abrahamsen.com (Eric Abrahamsen)
Date: Wed, 22 Aug 2007 15:45:05 +0800
Subject: for statement on empty iterable
In-Reply-To: <1187761957.636211.107060@x40g2000prg.googlegroups.com>
References: <1187760507.951994.50310@q4g2000prc.googlegroups.com>
	<7xabsk3zgm.fsf@ruckus.brouhaha.com>
	<1187761270.713307.224570@i38g2000prf.googlegroups.com>
	<7xejhw15r9.fsf@ruckus.brouhaha.com>
	<1187761957.636211.107060@x40g2000prg.googlegroups.com>
Message-ID: <57EFA4FF-D7AC-4FAA-A455-AAAEF73BC4D5@abrahamsen.com>

Here's another simple method:

l = ['j', 'a', 'm', 'e', 's']
counter = 0

for i in l:
     # Do your code
     counter += 1

print counter

Yrs,
Eric

> l = ['j', 'a', 'm', 'e', 's']
>
> for i in l
>  # i want to know the nth number of times it has loop thru or
> something like counter?
>
> Thanks
> james
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>



From afriere at yahoo.co.uk  Tue Aug 21 03:51:45 2007
From: afriere at yahoo.co.uk (Asun Friere)
Date: Tue, 21 Aug 2007 00:51:45 -0700
Subject: Newbee Question
In-Reply-To: <1187682119.353756.278840@i13g2000prf.googlegroups.com>
References: <mailman.15.1187620149.26576.python-list@python.org>
	<1187682119.353756.278840@i13g2000prf.googlegroups.com>
Message-ID: <1187682705.769160.68850@q3g2000prf.googlegroups.com>

On Aug 21, 5:41 pm, Asun Friere <afri... at yahoo.co.uk> wrote:
> over = Decimal('1.40)
oops, that should of course be:
over = Decimal('1.40')



From edgrsprj at ix.netcom.com  Thu Aug 30 21:55:43 2007
From: edgrsprj at ix.netcom.com (E.D.G.)
Date: Thu, 30 Aug 2007 19:55:43 -0600
Subject: Important Research Project
References: <13ddcvm1bsu3s94@corp.supernews.com>
	<1188482087.098419.56490@k79g2000hse.googlegroups.com>
	<1188500139.411988.127100@q5g2000prf.googlegroups.com>
Message-ID: <13deppf942e6u45@corp.supernews.com>

"dave_w" <dave.willmer at gmail.com> wrote in message
news:1188500139.411988.127100 at q5g2000prf.googlegroups.com...

My main Perl program is presently about 3500 lines of code long and 160 KB
in size. So I am not too anxious to translate it into another language.

The problem I am having is largely with the mechanics of linking modules to
the Perl compiler etc.  So I am looking for experts who can help with
cookbook instructions, start with step 1, step 2, step 3 etc.

With trying to find a chart program to use for example, there appear to be a
number of them.  But from examining their instructions it looks like most of
them must also be linked to a third program called Gnuplot.  And that
increases the complexity of getting something running.




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Aug 19 17:33:15 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 19 Aug 2007 23:33:15 +0200
Subject: Development for dual core machine
References: <1187515287.226791.186700@j4g2000prf.googlegroups.com>
	<08Xxi.28398$RX.5261@newssvr11.news.prodigy.net>
Message-ID: <5irr8rF3r2m8aU2@mid.individual.net>

samwyse wrote:
> The Python interpreter is not multi-cpu aware, so using Python
> threads won't work on multiple CPUs.

Are you sure about this?

Regards,


Bj?rn

-- 
BOFH excuse #12:

dry joints on cable plug



From damondolby at googlemail.com  Wed Aug 15 04:25:22 2007
From: damondolby at googlemail.com (towers)
Date: Wed, 15 Aug 2007 01:25:22 -0700
Subject: module: zipfile.writestr - line endings issue
In-Reply-To: <1%xwi.1232$4w7.433@newssvr22.news.prodigy.net>
References: <1187107452.905165.45700@l70g2000hse.googlegroups.com>
	<1187110504.154878.317460@19g2000hsx.googlegroups.com>
	<1187112768.095414.223640@w3g2000hsg.googlegroups.com>
	<1187120956.574400.99170@g4g2000hsf.googlegroups.com>
	<1%xwi.1232$4w7.433@newssvr22.news.prodigy.net>
Message-ID: <1187166322.391371.258800@a39g2000hsc.googlegroups.com>

> > Please don't top post.
>
> > The problem is with how you are opening the file. You need to open in
> > binary mode if you wish to read your file unaltered. Also, file() is
> > preferred over open() these days I think. Use:
>
> > dfile = file('test.csv', 'rb')
>
>  From Python 2.5 library documentation.
>
> <quote>
>       When opening a file, it's preferable to use `open()' instead of
>       invoking this constructor directly.  `file' is more suited to type
>       testing (for example, writing `isinstance(f, file)').
> </quote>
>
> Python documentation seem to recommend using open(). I personally prefer
> to use open, just because python open has same signature as POSIX open,
> even beginner programmers can understand the intent of the code clearly.
>
> Kolla


Opening in binary mode solves the issue. Thanks very much for the help.



From rainwatching at gmail.com  Fri Aug 31 08:53:36 2007
From: rainwatching at gmail.com (=?iso-8859-1?q?S=F6nmez_Kartal?=)
Date: Fri, 31 Aug 2007 12:53:36 -0000
Subject: reload(sys)
In-Reply-To: <JK2dnSgydPkg8ErbnZ2dnUVZ_u3inZ2d@comcast.com>
References: <1188521143.421431.119100@l22g2000prc.googlegroups.com>
	<JK2dnSgydPkg8ErbnZ2dnUVZ_u3inZ2d@comcast.com>
Message-ID: <1188564816.430863.219560@w3g2000hsg.googlegroups.com>

On 31 A ustos, 04:24, Steven Bethard <steven.beth... at gmail.com> wrote:
> S?nmez Kartal wrote:
> > I've had an encoding issue and solved it by
> > "sys.setdefaultencoding('utf-8')"...
>
> > My first try wasn't successful since setdefaultencoding is not named
> > when I imported sys module. After, I import sys module, I needed to
> > write "reload(sys)" also.
>
> > I wonder why we need to call "reload(sys)" to get setdefaultencoding
> > named?
>
> sys.setdefaultencoding is purposely deleted from the sys module after
> it's loaded because you really shouldn't be using it. The reload() call
> restores the deleted attribute.
>
> If you'd like a less brittle solution to your encoding issue, explain
> what the issue was, and people here can probably help you find a better
> solution.
>
> STeVe

I was using the XMLBuilder(xmlbuilder.py). I'm writing XML files as
"f.write(str(xml))". At execution of that line, it gives error with
description, configure your default encoding... My operating system's
default is utf-8, and Emacs' is utf-8 too. Default of XMLBuilder is
utf-8 too. There were some characters interpreter may couldn't print
in ascii. I have tried to replace those characters like (TM) (R)... I
cannot remember them right now, but if necessary I can find them
easily...

This is the part of xmlbuilder.py which raises the error.

        try:
            if self.pretty:
                # tabs are evil, so we will use two spaces
                outstr = self._dom.toprettyxml("
",encoding=self.encoding)
            else:
                outstr = self._dom.toxml(encoding=self.encoding)
        except UnicodeDecodeError:
            sys.stderr.write('Decoding Error: You must configure
default encoding\n')
            sys.exit()

What I can do instead of "import sys; reload(sys);
sys.setdefaultencoding('utf-8')"?

Happy coding



From larry.bates at websafe.com  Wed Aug 15 15:11:56 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 15 Aug 2007 14:11:56 -0500
Subject: "Variable variable name" or "variable lvalue"
In-Reply-To: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
References: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
Message-ID: <8PSdnfQVbqhk0l7bnZ2dnUVZ_h2pnZ2d@comcast.com>

mfglinux wrote:
> Hello to everybody
> 
> I would like to know how to declare in python a "variable name" that
> it is in turn a variable
> In bash shell I would wrote sthg like:
> 
> for x in `seq 1 3`
> do
>   M$i=Material(x)  #Material is a python class
> done
> 
> Why I need this? Cause I have a python module that obliges me to build
> a variable called Period, which should have a variable name of
> summands (depends on the value of x)
> 
> #Let's say x=3, then Period definition is
> Period=Slab(Material1(12.5)+Material2(25)+Material3(12.5)) #Slab is a
> python class
> 
> I dont know how to automatize last piece of code for any x
> 
> thank you
> 
> Marcos
> 
I think the answer is to use a dictionary of lists , but it is a little hard to
tell from your description:

mdict={1:[Material1, 12.5],
       2:[Material2, 25.0],
       3:[Material3, 12.5]
      }

x=3
slab_arg=0
for i in range(1,x):
    func, farg=mdict[i]
    slab_arg+=func(farg)

Period=Slab(slab_arg)

Obviously not tested!

I sense that the Material functions should be consolidated into something more
general here.

-Larry Bates


From hamstu at gmail.com  Wed Aug 22 23:59:34 2007
From: hamstu at gmail.com (Hamish Macpherson)
Date: Thu, 23 Aug 2007 03:59:34 -0000
Subject: libgmail failure
In-Reply-To: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
References: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
Message-ID: <1187841574.800105.219970@z24g2000prh.googlegroups.com>

On Aug 21, 5:07 pm, "james.p.n... at gmail.com" <james.p.n... at gmail.com>
wrote:
> Hey all,
>
> I've been usinglibgmailto send out automated notification emails for
> my company's nightly regression testing.  Last night these emails
> started failing, though the python code has not changed.  I updated to
> the latestlibgmail, but that isn't helping.  I've logged in to the
> email account directly, and the account is still working fine.
>
> The error I get is "HTTP Error 400: Bad Request" when using
> gmailAccount.login().  This doesn't throw an exception, just prints
> the error.  The code crashes outright when it tries to send mail.
>
> This code has been up and running for several months and just started
> failing last night.  Does anyone have an idea what's going on?
>
> The code and error follow (fairly short :-)
>
> Thanks much,
> James
>
> Code:
> -------------------------------------------------------------------------------------------------------
> def send(TO_LIST,SUBJECT,MESSAGE):
>     GA =libgmail.GmailAccount("xxx... at gmail.com","xxxxxxx")
>     try:
>         print "Logging in"
>         GA.login()
>     exceptlibgmail.GmailLoginFailure:
>         print "\nLogin failed. (Wrong username/password?)"
>     else:
>         print "Log in successful.\n"
>         for RX in TO_LIST:
>             MSG =libgmail.GmailComposedMessage(RX,SUBJECT,MESSAGE)
>             if GA.sendMessage(MSG):
>                 print "Message successfully sent to `%s` ." % RX
>             else:
>                 print "Could not send message."
> -------------------------------------------------------------------------------------------------------
>
> Output:
> -------------------------------------------------------------------------------------------------------
> Logging in
> HTTP Error 400: Bad Request
> Log in successful.
>
> No messages found
> Traceback (most recent call last):
>   File "C:\projects\physware\testCases\PythonTestScripts
> \SendEmail.py", line 58, in <module>
>     main()
>   File "C:\projects\physware\testCases\PythonTestScripts
> \SendEmail.py", line 55, in main
>     send(TO_LIST,SUB,MSG)
>   File "C:\projects\physware\testCases\PythonTestScripts
> \SendEmail.py", line 39, in send
>     if GA.sendMessage(MSG):
>   File "C:\projects\physware\testCases\PythonTestScripts\libgmail.py",
> line 588, in sendMessage
>     U_ACTION_TOKEN: self._getActionToken(),
>   File "C:\projects\physware\testCases\PythonTestScripts\libgmail.py",
> line 563, in _getActionToken
>     at = self._cookieJar._cookies[ACTION_TOKEN_COOKIE]
> KeyError: 'GMAIL_AT'
> -------------------------------------------------------------------------------------------------------

I believe I've found a (temporary) fix in this forum thread:
http://www.castlecops.com/p984588-HTTP_Error_400_when_using_gknujon.html

Pasted here for posterity;

---
Edit the libgmail.py file.

In the function

def login(self)


change the following text:
Code:
try:
    link = re.search(RE_PAGE_REDIRECT, pageData).group(1)
    redirectURL = urllib.unquote(link)


to add the extra line:
Code:
try:
    link = re.search(RE_PAGE_REDIRECT, pageData).group(1)
    redirectURL = urllib.unquote(link)
    redirectURL = redirectURL.replace('\\x26','&')
---

Must have been some small change in gmail's redirect that put it off.



From steve at holdenweb.com  Fri Aug 31 21:37:09 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 21:37:09 -0400
Subject: How can I wait for all the threads I spawn for 5 minutes
In-Reply-To: <1188603646.671414.272760@w3g2000hsg.googlegroups.com>
References: <1188603646.671414.272760@w3g2000hsg.googlegroups.com>
Message-ID: <fbafo8$ugc$1@sea.gmane.org>

herman wrote:
> Hi,
> 
> In my python program, I would to like to spwan 5 threads, for the them
> for 5 minutes maximum and the continue. Here is my script:
> 
>             threads = []
> 
>             for j in range(5):
>                 t = MyThread()
>                 threads.append(t)
> 
>             for t in threads:
>                 t.join(60*5)
>                 print "thread join\n"
> 
>             # wait for 5 minutes for all the threads to complete ,
> and
>             # then continue
> 
> But this code ends up waiting 5 minutes for **each** thread.  that is
> not what I want. I just want to wait for 5 minutes for all threads.
> how can I do that?
> 
> And after 5 minutes, i want to kill off all the threads I spawn
> earlier, how can I do that in python.
> 
> Thank you for any help.
> 
Well, to answer your second question, there is no reliable way to kill a 
  thread without having the thread periodically examine some aspect of 
its environment that the main thread can change to indicate the 
requirement that the sub-thread terminate.

The easiest way to check the number of outstanding threads is to use 
threading.activeCount(), which tells you how many outstanding threads 
remain.

Here's some code I used in a test program recently:

     # As long as we have more than just the 'main' thread running,
     # print out a status message
     while threading.activeCount() > 1 :
         print "-- after", iterCount, "sleeps", \
               str(threading.activeCount()), "threads running in total"
         iterCount += 1
         time.sleep(1)
     print "Only main thread remains"

Clearly you will need to set some termination flag (a global variable 
would do) after time is up, and as long as your threads examine this 
flag you'll be good to go.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bbxx789_05ss at yahoo.com  Mon Aug  6 18:46:55 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 06 Aug 2007 15:46:55 -0700
Subject: udp, datagram sockets
In-Reply-To: <1186431279.714122.316530@j4g2000prf.googlegroups.com>
References: <1186416225.769753.307110@o61g2000hsh.googlegroups.com>
	<mailman.1691.1186428498.22759.python-list@python.org>
	<1186431279.714122.316530@j4g2000prf.googlegroups.com>
Message-ID: <1186440415.340206.147800@d55g2000hsg.googlegroups.com>

On Aug 6, 1:27 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> I don't think that sending the datagram to port 7777 on localhost sends
> the message back to the client. I'm guessing the server is sending the
> message back to itself, which throws it into the infinite feedback loop
> you're experiencing.
>

Thanks.

On Aug 6, 2:14 pm, anethema <jefish... at gmail.com> wrote:
> Yes, you want to use the socket.recvfrom() method, store the address,
> and send the response to that address.  Your code is indeed repeatedly
> sending itself the received message.
>
> You want to change
>
>>     data  = s.recv(1024)
>
> to
>
>     data, recv_addr = s.recvfrom(1024)
>
> and
>
>>    size_sent = s.sendto(message[total_sent:], ("localhost",
>>  7777) )
>
> to
>
>     size_sent = s.sendto(message[total_sent:], recv_addr)
>

Thanks for the details.


> However, your client closes immediately after sending all its data, so
> it will never receive that message.
>

Yes, I commented out the recv() part of the client to debug the
infinite loop I was experiencing.  When I add that back to the client
everything works as it should.

Thanks to both of you again.



From zowtar at gmail.com  Fri Aug 31 11:42:42 2007
From: zowtar at gmail.com (zowtar)
Date: Fri, 31 Aug 2007 08:42:42 -0700
Subject: JavaScript
Message-ID: <1188574962.185775.274420@d55g2000hsg.googlegroups.com>

Guys, anybody know if is possible "to press" a button linked a
javascript function using python?
My Firefox send something like that:

POST /msgs.aspx TOKEN=B8B83BGDBC191B9FE0A0BE1393294FAB&sig=gpaiOqbp0Nr
%2BoecRLF4FGGDOAao
%3D&toUserId=1331299&rawAddedDate=1188546666&fromUserId=23029&Action.delete=Send
+data

python has modules for forms and other things... and for it?


Thank you for help...
zowtar



From steve at holdenweb.com  Mon Aug 13 09:49:28 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Aug 2007 09:49:28 -0400
Subject: negative polar axis
In-Reply-To: <1186999666.642856.16820@19g2000hsx.googlegroups.com>
References: <1186999666.642856.16820@19g2000hsx.googlegroups.com>
Message-ID: <f9pnh3$ce4$1@sea.gmane.org>

yadin wrote:
> hi!
> how can i do polar plot in python with negative axes
> that is the value of the magnitude is negative
> 
Surely a negative magnitude doesn't make sense in polar coordinates, 
since the magnitude is supposed to represent the distance from the center.

About the best interpretation I can think of is to add 180 degrees to 
the angle and reverse the sign of the magnitude, but this would be a 
hack. Where are those coordinates coming from?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From steve at holdenweb.com  Fri Aug 31 21:41:22 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 21:41:22 -0400
Subject: Parameter Passing - String Variable Truncated ?
In-Reply-To: <1188604442.700651.94530@19g2000hsx.googlegroups.com>
References: <1188604442.700651.94530@19g2000hsx.googlegroups.com>
Message-ID: <fbag04$ugc$2@sea.gmane.org>

goldtech wrote:
> Hi,
> 
> I'm passing what I think is a string parameter to another Python
> program (spawn.py)  - see the code snip below. But only the counter
> part gets printed to a log file via  spawn.py. Yet the echo print to
> the output window shows the whole string with the fc part. Better
> explained below I hope, there's the calling .py and the spawn
> script .py:
> ...snip...
> while fc:
>     counter = counter + 1
>     fc_cntr = str(counter) + ' : ' + fc
>     print fc_cntr + '\n'  # Print to Pythonwin interactive window -
> eg. "1 : New York" - all is printed OK
> 
>     arglist = []
>     arglist.append(pythonPath)
>     arglist.append(spawn_script)
>     arglist.append(fc_cntr)  # This gets sent to the spawn_script but
> only "1" gets printed
> 
>     os.spawnv(os.P_WAIT, pythonPath, arglist)
>     fc = fcs.next()
> ...
> --------------------------
> ## the spawn_script
> import win32com.client, sys, os, time, re
> 
> in_featclass = sys.argv[1]

Try

   in_featclass = sys.argv[1:]

to collect all the arguments. At the moment I suspect some shell 
argument processing is intervening, splitting your "N : something" into 
multiple arguments.

> handle = open('C:\\log_file.txt', 'a')
> handle.write(in_featclass + "\n") # ONLY the counter part gets printed
> to the log file!    Why?
> --------------------------
> 
> Thanks, for help.
> 
regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From nick at craig-wood.com  Fri Aug 10 11:30:06 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 10 Aug 2007 10:30:06 -0500
Subject: The Future of Python Threading
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<5i329uF3muir4U1@mid.individual.net>
Message-ID: <slrnfbou9k.vkb.nick@irishsea.home.craig-wood.com>

Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote:
>  Justin T. wrote:
> 
> > The detrimental effects of the GIL have been discussed several
> > times and nobody has ever done anything about it. 
> 
>  Also it has been discussed that dropping the GIL concept requires
>  very fine locking mechanisms inside the interpreter to keep data
>  serialised. The overhead managing those fine ones properly is not
>  at all negligible, and I think it's more than managing GIL.

That is certainly true.  However the point being is that running on 2
CPUs at once at 95% efficiency is much better than running on only 1
at 99%...

> > The truth is that the future (and present reality) of almost every
> > form of computing is multi-core,
> 
>  Is it? 8)

Intel, AMD and Sun would have you believe that yes!

>  The question is: If it really was, how much of useful performance
>  gain would you get?

The linux kernel has been through these growing pains already...  SMP
support was initially done with the Big Kernel Lock (BKL) which is
exactly equivalent to the GIL.

The linux kernel has moved onwards to finer and finer grained locking.

I think one important point to learn from the linux experience is to
make the locking a compile time choice.  You can build a uniprocessor
linux kernel with all the locking taken out or you can build a
multi-processor kernel with fine grained locking.

I'd like to see a python build as it is at the moment and a python-mt
build which has the GIL broken down into a lock on each object.
python-mt would certainly be slower for non threaded tasks, but it
would certainly be quicker for threaded tasks on multiple CPU
computers.

The user could then choose which python to run.

This would of course make C extensions more complicated...

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


From Brian.McCann at viziant.net  Thu Aug 23 20:53:03 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Thu, 23 Aug 2007 20:53:03 -0400
Subject: creating a tar file with python
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
	<faktv8$8fs$1@sea.gmane.org>
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE2ED@efmailx>

Hi,
 
I'm now getting this error
any ideas?
Thanks,
Brian


Traceback (most recent call last):
  File "./tarup.py", line 25, in ?
    tar = tarfile.open("test.xml","sample.tar.gz", 'w:gz')
  File "/usr/lib64/python2.4/tarfile.py", line 929, in open
    raise ValueError, "undiscernible mode"
ValueError: undiscernible mode
############################################################
#!/usr/bin/python
import string
import os
import sys
import time
import errno
import shutil
import tarfile

tar = tarfile.open(test.xml","sample.tar.gz", 'w:gz')
 
<mailto:brian.mccann at viziant.net> 
 

________________________________

From: python-list-bounces+brian.mccann=viziant.net at python.org on behalf of Steve Holden
Sent: Thu 8/23/2007 5:24 PM
To: python-list at python.org
Subject: Re: creating a tar file with python



Brian McCann wrote:
> Hi,
> 
> I'm trying to create a tar file of the contents of the current directory
> 
> right now there is only one file "text.xml" in the current dir,  I'm
> using"." current dir as source
> but that gives syntax error
>
> any help would be greatly appreciated
> --Brian
> 
> 
> #!/usr/bin/python
> import string
> import os
> import sys
> import time
> import errno
> import shutil
> import tarfile
> 
>
> tar = tarfile.open(.,"test.tar.gz", "w:gz)
> <mailto:brian.mccann at viziant.net>
> 
>
well, /probably/ (meaning I haven't done any testing) you need quotes
around the name of the current directory just like you do around the
name of the file. Try

   tar = tarfile(".", "test.tar.gz", "w:gz")

regards
  Steve
--
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------

--
http://mail.python.org/mailman/listinfo/python-list


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From tooru_honda at fast-mail.org  Fri Aug 24 22:43:42 2007
From: tooru_honda at fast-mail.org (tooru honda)
Date: Sat, 25 Aug 2007 10:43:42 +0800
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
Message-ID: <tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>

Hi, First of all, my thanks to all of you who replied.

I am writing a gamble simulation to convince my friend that his "winning 
strategy" doesn't work.  I use shuffle method from a random.SystemRandom 
instance to shuffle 8 decks of cards.

As the number of cards is quite small (number of cards is 416), the 
nonuniformity doesn't matter as most of you have already said.  Just to 
avoid argument from my friend, I am considering writing my own randint 
and shuffle methods based on os.urandom() though.

-tooru honda


From rcdailey at gmail.com  Tue Aug 21 17:05:50 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 21 Aug 2007 16:05:50 -0500
Subject: Tokenizer for python?
Message-ID: <496954360708211405j4ddbf4bfxd0710efbc58682b0@mail.gmail.com>

Hi,

I am looking for a sort of "tokenizer" for python. I've taken a look at the
tokenize module, but that seems to parse python code from what I read. I
want a tokenizer that works a little like boost::tokenizer, however for
python. Basically I want to be able to pass in an arbitrary string (or line
from readline()) and specify tokens that cause the string to be separated
into parts, much like the regular expression split() method (I think that's
the name of it). Is there anything that already exists that does this, or do
I need to implement it myself with regular expressions?

Thanks.
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From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  2 03:56:55 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 02 Aug 2007 09:56:55 +0200
Subject: Emacs + python
In-Reply-To: <mailman.1476.1186017909.22759.python-list@python.org>
References: <ak8x8v2udo.fsf@googlemail.com>
	<mailman.1476.1186017909.22759.python-list@python.org>
Message-ID: <46b18e47$0$25330$426a34cc@news.free.fr>

Edward O'Connor a ?crit :
>> Could anyone put me on the right track to developing Python with emacs
>> please : modes to consider, debugging etc hopefully all within emacs.
> 
> Personally, I prefer the python.el that ships with Emacs 22 to the
> python-mode.el from python.org. It seems more like other Emacs major
> modes.

Would you mind giving us a quick summary of the differences between 
these 2 modes ? As far as I'm concerned, I've been mostly happy with 
python-mode so far...

> 
> Ted
> 


From kyosohma at gmail.com  Thu Aug  2 15:23:39 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 02 Aug 2007 19:23:39 -0000
Subject: XML Processing
In-Reply-To: <mailman.1532.1186081833.22759.python-list@python.org>
References: <1186080339.344993.167670@z24g2000prh.googlegroups.com>
	<1186081434.012668.206770@z24g2000prh.googlegroups.com>
	<mailman.1532.1186081833.22759.python-list@python.org>
Message-ID: <1186082619.193097.207650@x40g2000prg.googlegroups.com>

On Aug 2, 2:09 pm, Jay Loden <pyt... at jayloden.com> wrote:
> kyoso... at gmail.com wrote:
> > On Aug 2, 1:45 pm, Roman <rgelfa... at hotmail.com> wrote:
> >> Is there a package that converts a string that contains special
> >> characters in xml to to literal value.  For instance, converts stringhttp://myhome/&paramtohttp://myhome/&param.
>
> >> Thanks in advance
>
> > I've seen examples using the HTMLgen module. But here's another script
> > I just found:
>
> >http://mail.python.org/pipermail/python-list/1999-November/016814.html
>
> > I would think that you could use regular expressions too.
>
> > Mike
>
> I would reccommend against using the example above or using regular expressions, since both are likely to miss corner cases, and the stdlib has an encode function that's already designed for this task
>
> http://docs.python.org/lib/module-xml.sax.saxutils.html
>
> The encode() function in xml.sax.saxutils also is extensible, should you run into any entities that it fails to escape in the current implementation.
>
> -Jay

Yes, I am an idiot.



From http  Sat Aug  4 01:06:25 2007
From: http (Paul Rubin)
Date: 03 Aug 2007 22:06:25 -0700
Subject: How to pass a reference to the current module
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<pan.2007.08.04.01.46.50.985228@REMOVE.THIS.cybersource.com.au>
	<7xy7gs9ioe.fsf@ruckus.brouhaha.com>
	<pan.2007.08.04.04.37.38.567054@REMOVE.THIS.cybersource.com.au>
Message-ID: <7xy7gr51ny.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> I'll point at the difficulty in using getattr for extracting a function
> from the current module:
> >>> func = getattr(???, 'f') # what should go there?

Hmm, it's a pain that there's no clean way to get at the current
module.  PEP 3130 shows some icky and unreliable ways, e.g.

   func = getattr(sys.modules[__name__], 'f')

PEP 3130's goal was to add a clean way to do this.  Unfortunately it
was rejected.


From simonwittber at gmail.com  Fri Aug 17 01:06:19 2007
From: simonwittber at gmail.com (Simon Wittber)
Date: Fri, 17 Aug 2007 05:06:19 -0000
Subject: One Python in a Pub, with 100 Rails Developers...
Message-ID: <1187327179.563426.299340@i38g2000prf.googlegroups.com>

Python helped deliver the goods last Wednesday evening in front of a
one hundred strong crowd of Rails hecklers...

Video footage here:
http://blog.scouta.com/2007/08/16/iccarus/

...just kidding, they were all great chaps, and only a few were Rails
devs, and only a few of them were hecklers :-)

I was amazed at how many developers in the audience use Rails for day
to day development. As far as I could see, I was the only person
developing web apps using a Python framework.

For the interested, a more thorough screencast of the ICCARUS
visualisation system is over here:
http://scouta.com/faves/8raO17jT8Y3/

We used Python, Pyrex and Pygame to build ICCARUS over about 3 days.
ICCARUS retrieved its data via a web service provided by TurboGears.
It ran on OSX, Vista and Linux with minimal porting. Python through
the entire system. Quite a  'Python Success Story', IMHO.


-Sw.



From aclarke11 at yahoo.co.uk  Wed Aug  8 19:41:46 2007
From: aclarke11 at yahoo.co.uk (Tony)
Date: Wed, 08 Aug 2007 16:41:46 -0700
Subject: How can I programmatically find the name of a method from within
	that method?
In-Reply-To: <f9d92f$8qe$02$1@news.t-online.com>
References: <1186548312.672360.259100@q3g2000prf.googlegroups.com>
	<mailman.1727.1186549847.22759.python-list@python.org>
	<1186557384.845276.151630@i13g2000prf.googlegroups.com>
	<f9br51$e9a$01$1@news.t-online.com>
	<1186603550.882122.223340@d55g2000hsg.googlegroups.com>
	<f9d92f$8qe$02$1@news.t-online.com>
Message-ID: <1186616506.072708.3310@g4g2000hsf.googlegroups.com>

On Aug 8, 9:28 pm, Peter Otten <__pete... at web.de> wrote:

> No, just wrong.
>
> >> class A:
>
> ...     def alpha(self): return dir(self)[-2]
> ...     def gamma(self): return dir(self)[-1]
> ...>>> a = A()
> >>> a.alpha(), a.gamma()
> ('alpha', 'gamma')
> >>> a.beta = 42
> >>> a.alpha(), a.gamma()
>
> ('beta', 'gamma')
>
> Peter
Only wrong if the function is only to write its own name. if it does
something else as well, seems to work:

class a:

	def square(self, x):
		print 'executing:', dir(self)[-1]
		print x*x
	def cube(self, x):
		print 'executing:',	dir(self)[-2]
		print x*x*x

b=a()

b.cube(4),b.square(2)
b.c =4
b.cube(3), b.cube(2)



executing: cube
64
executing: square
4
executing: cube
27
executing: cube
8

cheers



From fartknuckle at fartknuckle.com  Fri Aug 10 19:08:57 2007
From: fartknuckle at fartknuckle.com (fartknuckle)
Date: Fri, 10 Aug 2007 18:08:57 -0500
Subject: Python Dies on "make install"
References: <pan.2007.08.10.21.01.56.706157@fartknuckle.com>
	<f9im89$3tf$1@nemesis.news.tpi.pl>
Message-ID: <pan.2007.08.10.23.08.54.304894@fartknuckle.com>

On Fri, 10 Aug 2007 23:39:39 +0200, Jarek Zgoda wrote:

> fartknuckle :
> 
>> When I try to build and install python from source It configures and 
>> makes fine but upon 'make install' I always get to this
>> point:
>> 
>> 
>> 
>> Listing /usr/local/lib/python2.5/xml/sax ...
>> Compiling /usr/local/lib/python2.5/xml/sax/__init__.py ...
>> Compiling /usr/local/lib/python2.5/xml/sax/_exceptions.py ...
>> Compiling /usr/local/lib/python2.5/xml/sax/expatreader.py ...
>> Compiling /usr/local/lib/python2.5/xml/sax/handler.py ...
>> Compiling /usr/local/lib/python2.5/xml/sax/saxutils.py ...
>> Compiling /usr/local/lib/python2.5/xml/sax/xmlreader.py ...
>> Compiling /usr/local/lib/python2.5/xmllib.py ...
>> Compiling /usr/local/lib/python2.5/xmlrpclib.py ...
>> Compiling /usr/local/lib/python2.5/zipfile.py ...
>> make: *** [libinstall] Error 1                     
>> 
>> 
>> 
>> I am currently trying to install 2.5.1. I get the error no matter what the
>> version is. Does anyone have an idea what may be causing this?
>> 
>> I have gone through the config.log and found no errors concerning
>> zipfile.py or zipfile or zip. I am thinking the error is the next command
>> after the zipfile.py installation because I can go into 
>> /usr/local/lib/python2.5 and zipfile.py is installed.
>> 
>> Any help much appreciated.
> 
> I saw this (and reported this issue in SF's tracker) at some time around
> 2.2/2.3 (just cann't recall). I don't know what causes this problem
> exactly, but in my case the installation succeeded if I removed prevoius
> python's library directory (/usr/lib/python2.x or
> /usr/local/lib/python2.x). The module that stopped installation was
> exactly the same.

That did the trick, thanks a million.   :)




-- 
Take summa dis punk!


From DustanGroups at gmail.com  Fri Aug 10 08:36:23 2007
From: DustanGroups at gmail.com (Dustan)
Date: Fri, 10 Aug 2007 12:36:23 -0000
Subject: Question about properties.
In-Reply-To: <1186741865.755891.207090@i13g2000prf.googlegroups.com>
References: <1186741289.074717.174370@e16g2000pri.googlegroups.com>
	<1186741865.755891.207090@i13g2000prf.googlegroups.com>
Message-ID: <1186749383.720833.240060@x40g2000prg.googlegroups.com>

On Aug 10, 5:31 am, dijkstra.ar... at gmail.com wrote:
> On Aug 10, 12:21 pm, king kikapu <aboudou... at panafonet.gr> wrote:
>
>
>
> > Hi,
>
> > i read in a book the following code snippet that is dealing with
> > properties:
>
> > class ProtectAndHideX(object):
> >     def __init__(self, x):
> >         assert isinstance(x, int), '"x" must be an integer!"'
> >         self.__x = ~x
>
> >     def get_x(self):
> >         return ~self.__x
>
> >     x = property(get_x)
>
> > Can anyone please help me understand what the symbol "~" does here ??
>
> > Thanks for any help!
> >>> help(2)
>
> ....
>  |  __invert__(...)
>  |      x.__invert__() <==> ~x
>
> hth.
> Duikboot

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

The unary ~ (invert) operator yields the bit-wise inversion of its
plain or long integer argument. The bit-wise inversion of x is defined
as -(x+1). It only applies to integral numbers.



From zyzhu2000 at gmail.com  Mon Aug 20 16:22:15 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Mon, 20 Aug 2007 20:22:15 -0000
Subject: 'REPL' style IDE
In-Reply-To: <mailman.20.1187639538.32294.python-list@python.org>
References: <1187632249.748945.158910@i13g2000prf.googlegroups.com>
	<mailman.20.1187639538.32294.python-list@python.org>
Message-ID: <1187641335.794138.27150@q3g2000prf.googlegroups.com>

On Aug 20, 2:51 pm, JoeSox <joe... at gmail.com> wrote:
> On 8/20/07, beginner <zyzhu2... at gmail.com> wrote:
>
> > Hi Everyone,
>
> > I am using the Wing IDE. It works great when developing applications,
> > but the workflow is like Visual Studio -- after you execute it or
> > debug it, the python script ends.
>
> > What I want is an interactive interpreting environment. I want the IDE
> > to execute a boot script to initialize my environment and create some
> > basic data objects. And then I want to be able to type in command on
> > the command line using these objects. The IDLE that comes with Python
> > does this, but compared with Wing, it does not have a lot of the
> > convenient features.
>
> > I am wondering if there is anything more powerful than IDLE that can
> > do this.
>
> I use Wing IDE.
> Place something like this on the bottom of your module you are debuging.
> Place a stop point on the line you want then start your debug! Hope that helps.
>
> def test():
>     c=MyClass
>     c.do_foobar()
>
> if __name__ == '__main__':
>   test()
> --
> Later, Joe

Thanks for your help.

Yes, this is what I always do. However, I want more than debugging
interactively. I am trying to use the python interperter as a
programmable application. Once I run my boot script, the python
interpreter should have all the right objects and libraries, and the
end user (who obviously knows python) can simply type in a few
commands, calling my functions, to achieve his purposes
interactively.

What I am doing right now is almost exactly what you prescribed. I put
a 'pass' statement at the end of my boot script and set a breakpoint
on it, so that once the debugger stops on the breakpoint, the user can
start typing in commands in the Debug Probe window. But this is by no
means a nice set up.

Thanks,
Geoffrey



From pyscottishguy at hotmail.com  Mon Aug 13 14:02:23 2007
From: pyscottishguy at hotmail.com (pyscottishguy at hotmail.com)
Date: Mon, 13 Aug 2007 18:02:23 -0000
Subject: Colored text
In-Reply-To: <slrnfc0kqf.1us.horpner@FIAD06.norwich.edu>
References: <1186970751.435970.189900@q3g2000prf.googlegroups.com>
	<mailman.1904.1186984795.22759.python-list@python.org>
	<slrnfc0kqf.1us.horpner@FIAD06.norwich.edu>
Message-ID: <1187028143.736566.175220@d55g2000hsg.googlegroups.com>

On Aug 13, 10:37 am, Neil Cerutti <horp... at yahoo.com> wrote:
> On 2007-08-13, Michael Bentley <mich... at jedimindworks.com> wrote:
>
>
>
> > On Aug 12, 2007, at 7:05 PM, Rohan wrote:
> >> Can some one tell me how do I get colored text. Say when I want to
> >> write something in a text file , how do I get it colored.
>
> > You can use ANSI escape codes --http://en.wikipedia.org/wiki/
> > ANSI_escape_code:
>
> Unfortunately, most versions of Windows of the last 7 years
> (2000, XP, probably Vista) don't support ANSI escape codes well
> enough to work with Python.
>
> --
> Neil Cerutti
> We have to play hard for the full 40 minutes. 48? Oh, that's right. --Mikki
> Moore

Check out these recipes:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/475116
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/496901



From FJIFALSDGVAF at spammotel.com  Mon Aug 20 07:37:02 2007
From: FJIFALSDGVAF at spammotel.com (Thomas Kellerer)
Date: Mon, 20 Aug 2007 13:37:02 +0200
Subject: best GUI library for vector drawing program
In-Reply-To: <sptic31137mal5t4cajdo6lvddo8spjkbp@4ax.com>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
	<sptic31137mal5t4cajdo6lvddo8spjkbp@4ax.com>
Message-ID: <5itcmuF3s08srU1@mid.individual.net>

Roedy Green wrote:
>> What would be the best cross-platform GUI library to use for a vector
>> based CAD program ( something like Visio on Windows ) 
> I don't know about he best, but I have collected a list of them at
> http://mindprod.com/jgloss/graph.html

Roedy,

you might want to add NetBeans' Graph library to the list. It is very 
similar to Eclipse's GEF

http://graph.netbeans.org/

Thomas


From kyosohma at gmail.com  Wed Aug  8 13:36:51 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 08 Aug 2007 17:36:51 -0000
Subject: Launch file from Python
In-Reply-To: <1186594137.971393.128780@57g2000hsv.googlegroups.com>
References: <1186594137.971393.128780@57g2000hsv.googlegroups.com>
Message-ID: <1186594611.490723.251870@m37g2000prh.googlegroups.com>

On Aug 8, 12:28 pm, joc... at gmail.com wrote:
> Good afternoon from someone who is trying to learn Python.
>
> I would like to launch an app from within a Python script. From the
> examples I have found, I should be able to do this with os.system.
>
> I use this:
> os.system("xplanet-1.2.0/xplanet.exe -fontsize 24 -label -target earth
> -lat 33.65 -lon -84.42 -radius 40 -num_times 1 -tmpdir .")
> This is copied directly from the .bat file that launches the xplanet
> app. It works there.
>
> and get this:
> 1
>
> Can someone fill me in?  Thanks.

That's just the exit status or run status, if I recall correctly. I
think 0 (i.e. False) means it didn't run properly and anything else is
True, or ok. Something like that. Technically speaking, you should
probably switch to using the subprocess module as it is replacing that
os module's functionality: http://www.python.org/doc/2.4/lib/module-subprocess.html

This thread also discusses it somewhat:
http://www.velocityreviews.com/forums/t348777-python-doc-problem-example-ossystem.html

Mike



From ldo at geek-central.gen.new_zealand  Thu Aug 23 04:19:00 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Thu, 23 Aug 2007 20:19:00 +1200
Subject: What Are These Import/From Statements about?
References: <un_yi.34471$2v1.24183@newssvr14.news.prodigy.net>	<mailman.123.1187804723.32294.python-list@python.org>
	<qb0zi.47332$Um6.34487@newssvr12.news.prodigy.net>
	<mailman.139.1187815633.32294.python-list@python.org>
Message-ID: <fajfp0$ke0$1@lust.ihug.co.nz>

In message <mailman.139.1187815633.32294.python-list at python.org>, Robert
Kern wrote:

> os.path. It's a sub-module of the standard os module.

Actually, there are no such things as sub-modules (as you'll find out if you
try to define one). What it really is is a variable in that module, which
points to another module (e.g. posixpath).


From Shawn at Milochik.com  Mon Aug 20 11:01:37 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Mon, 20 Aug 2007 11:01:37 -0400
Subject: I Need help from all the group participants
In-Reply-To: <fac7nj$ci9$1@localhost.localdomain>
References: <fac7nj$ci9$1@localhost.localdomain>
Message-ID: <2dc0c81b0708200801k63352a4gcea50e418bf465a@mail.gmail.com>

"Please enter John's heart rate."

"Please notify me immediately if John's heart rate drops below 60 or
exceeds 100."


From apt.shansen at gmail.com  Fri Aug 17 19:26:19 2007
From: apt.shansen at gmail.com (Stephen Hansen)
Date: Fri, 17 Aug 2007 16:26:19 -0700
Subject: wxPython in C++ app using wxWidgets
In-Reply-To: <rIidnU2tiqY8vVvbnZ2dnUVZ8ternZ2d@eclipse.net.uk>
References: <rIidnU2tiqY8vVvbnZ2dnUVZ8ternZ2d@eclipse.net.uk>
Message-ID: <7a9c25c20708171626t3e6717afh3564564fbfab57d5@mail.gmail.com>

On 8/17/07, Marcin Kalicinski <kalita at poczta.onet.pl> wrote:
>
> I have an application written in C++ that uses wxWidgets for GUI. I use
> embedded Python for scripting inside of this application. I want to use
> wxPython to add GUI to my scripts - because my C++ App uses wxWidgets I
> thought it to be easy. The problem is that wxPython knows nothing about
> wxApp/wxFrame objects created in my C++ application, and insists (by
> giving
> me asserts) that I create another wxApp object for wxPython inside my
> scripts. Obviously, this is not what I want. I want the scripts to use the
> same wxApp/wxFrame object that my C++ application already created. More
> specifically, I want to create dialogs in wxPython that will have my
> application wxFrame as parent.
>

I have nooo idea how to do it with pure wx, buut, you could try passing the
handle for the parent via wx.Window.GetHandle() to Python, then create a
reference to it in python via wx.Window_FromHWND(handle). Maybe! Its just a
guess :)
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From max at alcyone.com  Wed Aug 29 17:57:34 2007
From: max at alcyone.com (Erik Max Francis)
Date: Wed, 29 Aug 2007 14:57:34 -0700
Subject: Haskell like (c:cs) syntax
In-Reply-To: <rAbBi.13285$fb.8669@tornado.fastwebnet.it>
References: <fb25uh$gl9$1@online.de>
	<mailman.85.1188339894.28954.python-list@python.org>
	<rAbBi.13285$fb.8669@tornado.fastwebnet.it>
Message-ID: <yPidnai--qNTdkjbnZ2dnUVZ_hzinZ2d@speakeasy.net>

Marco Mariani wrote:
> Ricardo Ar?oz ha scritto:
> 
>> L = ['one', 'two', 'three', 'four', 'five']
>>
>> print L[0]    # This would be 'head'
>> print L[1:]   # This would be 'tail'
>>
>> Caution : L[0] and L[1:] are COPIES of the head and tail of the list.
> 
> This might surprise people who see L[1:] = [], since changing a copy is 
> not supposed to change the original.

That's because slicing and assigning is not the same thing as slicing 
alone.  Slicing and assigning mutates the sequence.  Slicing alone 
returns a copy.

 >>> L = ['one', 'two', 'three', 'four', 'five']
 >>> x = L[1:] # grab a slice
 >>> x[:] = [] # mutate it
 >>> x
[]
 >>> L # original list is unchanged
['one', 'two', 'three', 'four', 'five']

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Eternity is very long, especially near the end.
    -- Woody Allen


From martin at v.loewis.de  Thu Aug 30 05:50:52 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 30 Aug 2007 11:50:52 +0200
Subject: gc.garbage
In-Reply-To: <1188467173.708043.44800@w3g2000hsg.googlegroups.com>
References: <1188467173.708043.44800@w3g2000hsg.googlegroups.com>
Message-ID: <46D692FC.4030805@v.loewis.de>

> gc.set_debug(gc.DEBUG_LEAK)
> print gc.garbage
> 
> --output:--
> []
> gc: uncollectable <Dog 0x56e10>
> gc: uncollectable <Cat 0x56e30>
> gc: uncollectable <dict 0x58270>
> gc: uncollectable <dict 0x43e40>

gc.garbage is filled only after these messages
are printed, not before. You need to add an explicit
call to gc.collect() if you want to see what
uncollectable garbage you have.

Regards,
Martin


From lionchao at gmail.com  Wed Aug 22 16:13:30 2007
From: lionchao at gmail.com (Eric CHAO)
Date: Wed, 22 Aug 2007 21:13:30 +0100
Subject: way to define static method
In-Reply-To: <de6dc4a00708221234q63752cc2xc7ac1b64495ae95e@mail.gmail.com>
References: <de6dc4a00708221234q63752cc2xc7ac1b64495ae95e@mail.gmail.com>
Message-ID: <de6dc4a00708221313h36b328a5obd5d30f20ec081a7@mail.gmail.com>

Thanks a lot.

Because I found a solution about static method from
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52304

And that's a little bit difficult to understand.

# direct, naive approach -- doesn't work...:
class Class1:
   def static1(name):
       print "Hello",name

# ...but now, a call such as:
Class1.static1("John")
# will fail with a TypeError, as 'static1' has become
# an unbound-method object, not a plain function.

# This is easy to solve with a simple tiny wrapper:
class Callable:
   def __init__(self, anycallable):
       self.__call__ = anycallable

# toy-example usage:
class Class2:
   def static2(name):
       print "Hi there",name
   static2 = Callable(static2)

# now, a call such as:
Class2.static2("Peter")
# works just fine, and as-expected


From bignose+hates-spam at benfinney.id.au  Thu Aug 30 19:31:17 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 31 Aug 2007 09:31:17 +1000
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
Message-ID: <87bqcod2gq.fsf@benfinney.id.au>

zzbbaadd at aol.com writes:

> In my case of have done os.listdir() on two directories. I want to see
> what files are in directory A that are not in directory B.

You get that information unambiguously. It's an exceptional case,
since there's no index to return, so it throws an exception.

> I have used exceptions in other languages and only do so on logic
> that should never happen.

You're confusing "assert" ("this should always be true") with
"exception" ("this is an exception to the the normal flow of this
process").

An exception isn't "something that should never happen", it's
something that is entirely possible and needs to be handled somehow.

-- 
 \       "Always do right. This will gratify some people, and astonish |
  `\                                         the rest."  -- Mark Twain |
_o__)                                                                  |
Ben Finney


From __peter__ at web.de  Tue Aug 21 10:17:44 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 21 Aug 2007 16:17:44 +0200
Subject: python 2.5.1 segfault, multithreading & dual core issue?
References: <46caf049$0$239$e4fe514c@news.xs4all.nl>
Message-ID: <faes69$vp1$03$1@news.t-online.com>

Paul Sijben wrote:

> I am running a multi-threaded python application in a dual core intel
> running Ubuntu.
> 
> I am using python 2.5.1 that I compiled myself. At random points I am
> getting segmentation faults (sometimes indicating a duplicate free).
> Below is the backtrace of the latest segfault.
> 
> I am thinking this might be an issue related to the dual core CPU so I
> am now running the app with affinity to one CPU to test this hypothesis.
> 
> Where can I put such a bugreport?

http://sourceforge.net/bugs/?group_id=5470

if you do it before August 23, when the bugtracker will be moved to
bugs.python.org.

Note that a thread-related bug causing a segfault has been reported today at

http://sourceforge.net/tracker/index.php?func=detail&aid=1778376&group_id=5470&atid=105470

I could reproduce this one on my machine, though, so I'm sure that it has
nothing to do with a dual core CPU.

Peter



From jjl at pobox.com  Sun Aug 12 08:50:49 2007
From: jjl at pobox.com (John J. Lee)
Date: Sun, 12 Aug 2007 12:50:49 GMT
Subject: Seek the one billionth line in a file containing 3 billion lines.
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
	<7xzm12o7o7.fsf@ruckus.brouhaha.com>
	<1186555297.877273.40540@o61g2000hsh.googlegroups.com>
	<874pja70p5.fsf@benfinney.id.au>
	<mailman.1740.1186581536.22759.python-list@python.org>
Message-ID: <87eji829xy.fsf@pobox.com>

"Chris Mellon" <arkanes at gmail.com> writes:
[...]
> The minimum bounds for a line is at least one byte (the newline) and
> maybe more, depending on your data. You can seek() forward the minimum
> amount of bytes that (1 billion -1) lines will consume and save
> yourself some wasted IO.

But how do you know which line number you're on, then?


John


From wolf_tracks at invalid.com  Sat Aug 18 11:40:43 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sat, 18 Aug 2007 15:40:43 GMT
Subject: Python and Tkinter Programming--Expensive!
In-Reply-To: <fa554f$vt$1@zinnia.noc.ucla.edu>
References: <Xllxi.9066$3x.1781@newssvr25.news.prodigy.net>
	<fa554f$vt$1@zinnia.noc.ucla.edu>
Message-ID: <%pExi.33896$2v1.26943@newssvr14.news.prodigy.net>

Thanks. I'm borrowing it from a library and see the URL on the back of the 
book. <www.manning.com/grayson>

James Stroud wrote:
> W. Watson wrote:
>> Why is the book in Subject (author is Grayson) so expensive? $100 on 
>> Amazon and $195 on ABE. Aren't there alternatives?
> 
> 
> Read the fine print. Its available as an ebook for about $25.00 at 
> Manning. You can print out just the parts you need--or read it from your 
> iphone.
> 
> James
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From nospam at invalid.com  Sun Aug 19 14:21:28 2007
From: nospam at invalid.com (Jack)
Date: Sun, 19 Aug 2007 11:21:28 -0700
Subject: Parser Generator?
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
	<_6mdnZxbdNKTVFrbnZ2dnUVZ_tqtnZ2d@comcast.com>
	<xHWxi.1073$vU4.633@nlpi068.nbdc.sbc.com>
Message-ID: <fbadnTQA4qe6F1XbnZ2dnUVZ_s-pnZ2d@comcast.com>

Thanks for the suggestion. I understand that more work is needed for natural 
language
understanding. What I want to do is actually very simple - I pre-screen the 
user
typed text. If it's a simple syntax my code understands, like, Weather in 
London, I'll
redirect it to a weather site. Or, if it's "What is ... " I'll probably 
redirect it to wikipedia.
Otherwise, I'll throw it to a search engine. So, extremelyl simple stuff ...

"samwyse" <dejanews at email.com> wrote in message 
news:xHWxi.1073$vU4.633 at nlpi068.nbdc.sbc.com...
> Jack wrote:
>> Thanks for all the replies!
>>
>> SPARK looks promising. Its doc doesn't say if it handles unicode
>> (CJK in particular) encoding though.
>>
>> Yapps also looks powerful: http://theory.stanford.edu/~amitp/yapps/
>>
>> There's also PyGgy http://lava.net/~newsham/pyggy/
>>
>> I may also give Antlr a try.
>>
>> If anyone has experiences using any of the parser generators with CJK
>> languages, I'd be very interested in hearing that.
>
> I'm going to echo Tommy's reply.  If you want to parse natural language, 
> conventional parsers are going to be worse than useless (because you'll 
> keep thinking, "Just one more tweak and this time it'll work for sure!"). 
> Instead, go look at what the interactive fiction community uses.  They 
> analyse the statement in multiple passes, first picking out the verbs, 
> then the noun phrases.  Some of their parsers can do on-the-fly 
> domain-specific spelling correction, etc, and all of them can ask the user 
> for clarification.  (I'm currently cobbling together something similar for 
> pre-teen users.) 




From __peter__ at web.de  Thu Aug  9 02:50:42 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 09 Aug 2007 08:50:42 +0200
Subject: How can I programmatically find the name of a method from within
	that method?
References: <1186548312.672360.259100@q3g2000prf.googlegroups.com>
	<mailman.1727.1186549847.22759.python-list@python.org>
	<1186557384.845276.151630@i13g2000prf.googlegroups.com>
	<f9br51$e9a$01$1@news.t-online.com>
	<1186603550.882122.223340@d55g2000hsg.googlegroups.com>
	<f9d92f$8qe$02$1@news.t-online.com>
	<1186616506.072708.3310@g4g2000hsf.googlegroups.com>
Message-ID: <f9edg2$ceu$02$1@news.t-online.com>

Tony wrote:

> On Aug 8, 9:28 pm, Peter Otten <__pete... at web.de> wrote:
> 
>> No, just wrong.
>>
>> >> class A:
>>
>> ...     def alpha(self): return dir(self)[-2]
>> ...     def gamma(self): return dir(self)[-1]
>> ...>>> a = A()
>> >>> a.alpha(), a.gamma()
>> ('alpha', 'gamma')
>> >>> a.beta = 42
>> >>> a.alpha(), a.gamma()
>>
>> ('beta', 'gamma')
>>
>> Peter

> Only wrong if the function is only to write its own name. if it does
> something else as well, seems to work:
> 
> class a:
> 
> ????????def square(self, x):
> ????????????????print 'executing:', dir(self)[-1]
> ????????????????print x*x
> ????????def cube(self, x):
> ????????????????print 'executing:',?????dir(self)[-2]
> ????????????????print x*x*x
> 
> b=a()
> 
> b.cube(4),b.square(2)
> b.c =4
> b.cube(3), b.cube(2)

You mean 

b.cube(3), b.square(2)

> executing: cube
> 64
> executing: square
> 4
> executing: cube
> 27
> executing: cube
> 8

Yeah, cargo cult programming, I love it.

dir() sorts attribute names alphabetically. Therefore the tail of the list
you are accessing will only be altered if you choose a name >
min(other_names), i. e. a name that comes after "cube" in the alphabet. Try
setting

b.root = 42

if you don't believe me.

Peter


From ddyche at bigbluenetworks.com  Wed Aug 29 00:23:53 2007
From: ddyche at bigbluenetworks.com (ddyche)
Date: Wed, 29 Aug 2007 00:23:53 -0400
Subject: test
Message-ID: <46D4F4D9.5030208@bigbluenetworks.com>




From jstroud at mbi.ucla.edu  Sat Aug  4 00:06:23 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 03 Aug 2007 21:06:23 -0700
Subject: How to pass a reference to the current module
In-Reply-To: <7xtzrg3vof.fsf@ruckus.brouhaha.com>
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<pan.2007.08.04.01.46.50.985228@REMOVE.THIS.cybersource.com.au>
	<f90lon$av5$1@daisy.noc.ucla.edu>
	<7xtzrg3vof.fsf@ruckus.brouhaha.com>
Message-ID: <f90tvv$nt7$2@zinnia.noc.ucla.edu>

Paul Rubin wrote:
> James Stroud <jstroud at mbi.ucla.edu> writes:
> 
>>      Module            Behavior
>>   ==============  ====================================================
>>    UserDefined1   Imports FunctionUser
>>    ThirdParty     Contains User Functions (May be ==UserDefined1)
>>    FunctionUser   do_something_with() and/or get_function_from_name()
>>
>>So the name-to-function mapping is done in FunctionUser but the
>>function is actually defined in UserDefined1 (or ThirdParty if
>>ThirdParty is different than UserDefined1).
> 
> 
> I'm still completely confused.  Does FunctionUser know what module the
> user functions are supposed to come from?  Could you give an example
> of what you want the actual contents of those 3 modules to look like?
> E.g.:
> 
>     UserDefined1.py:
>       import FunctionUser
> 
>       def foo(x):
>           print x+3
> 
>     FunctionUser.py:
>        def do_something_with (module, funcname, *args, **kw):
>          func = getattr(module, funcname)
>          func (*args, **kw)
> 
>     main.py:
>        import UserDefined1, FunctionUser
> 
>        # the following should print 10
>        FunctionUser.do_something_with(UserDefined1, 'foo', 7)
> 
> I don't think the above is quite what you want, but is it somewhere
> close?

Its very close. However, there is the possibiltiy that main.py and 
UserDefined1.py are the same module. In such a case I'm guessing that I 
need to resort to the gymnastics of frame inspection I mentioned 
earlier. The problem is when this combination of possibilities exists:

    1. main.py is named without the .py (e.g. `main`) as would be
       the convention for "programs"), and is not a true python
       module as a result--perhaps python has a mechanism for
       importing such files?
    2. foo is defined in `main`

Possibility two (even when it is a properly named module) sets the stage 
for a circular import, but I believe in python this is not entirely 
worrisome. However, the combination above makes it difficult to pass a 
reference to the `main` namespace without some sort of introspection. 
Ideally, I would prefer to not require the user to provide some mapping 
as it detracts from the convenience of the API. For example:

    from UserDefined1 import some_function
    def foo(): [etc.]
    def doit(): [etc.]
    mapping = {
                'foo' : foo,
                'doit' : doit,
                'some_function' : some_function
              }

The idea would be that the above mapping would be specified in the 
configuration file:

[foo]
param1 = float
param2 = 4

[option1]
__module__ = 'UserDefined1'
__function__ = 'doit'
param1 = str
param2 = 30.0

[doit]
param1 = float
param2 = float

[etc.]

James


-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From luismgz at gmail.com  Sun Aug 12 20:54:11 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M=2E_Gonz=E1lez?=)
Date: Mon, 13 Aug 2007 00:54:11 -0000
Subject: python + XUL
In-Reply-To: <46BEA6FC.9050907@web.de>
References: <1186894004.913359.132000@b79g2000hse.googlegroups.com>
	<46BEA6FC.9050907@web.de>
Message-ID: <1186966451.081184.63490@r34g2000hsd.googlegroups.com>

On Aug 12, 3:21 am, Stefan Behnel <stefan.behnel-n05... at web.de> wrote:
> Madhu Alagu wrote:
> > Hi
>
> > Python + XUL Success Stories
>
> > Thanks
>
> > Madhu Alagu
>
> Any chance you forgot to ask a question?
>
> Stefan



My telepatic powers tell me that this means:
"I don't really feel like googling, so just give me the info, ok?"



From steve at holdenweb.com  Fri Aug 31 14:26:53 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 14:26:53 -0400
Subject: list index()
In-Reply-To: <1i3pcju.j2fvej1056nqpN%aleax@mac.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<mailman.135.1188474634.28954.python-list@python.org>	<1188495863.242815.236900@o80g2000hse.googlegroups.com>	<1i3ob5k.dm3jmoqx1z68N%aleax@mac.com>	<1188530557.550119.27260@q3g2000prf.googlegroups.com>
	<1i3pcju.j2fvej1056nqpN%aleax@mac.com>
Message-ID: <fb9mhg$mf3$2@sea.gmane.org>

Alex Martelli wrote:
> mensanator at aol.com <mensanator at aol.com> wrote:
>    ...
>> Why wouldn't "the one obvious way" be:
>>
>>  def inAnotB(A, B):
>>      inA  = set(os.listdir(A))
>>      inBs = set(os.listdir(B))
>>      return inA.difference(inBs)
> 
> If you want a set as the result, that's one possibility (although
> possibly a bit wasteful as you're building one more set than necessary);
> I read the original request as implying a sorted list result is wanted,
> just like os.listdir returns (possibly sorted in case-independent order
> depending on the underlying filesystem).  There's no real added value in
> destroying inA's ordering by making it a set, when the list
> comprehension just "naturally keeps" its ordering.
> 
As I had reason to point out in another thread only recently, 
os.listdir() makes no promises about the filename ordering.

Nevertheless I agree with you that the list comprehension method is the 
obvious way to solve the problem, and the set optimization is just that.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From steve at shrogers.com  Thu Aug  9 08:25:52 2007
From: steve at shrogers.com (Steve)
Date: Thu, 09 Aug 2007 05:25:52 -0700
Subject: (Re)announcing APL 2007
In-Reply-To: <1186406430.744134.298400@x35g2000prf.googlegroups.com>
References: <5hnkb3F3hus4jU1@mid.individual.net>
	<1186406430.744134.298400@x35g2000prf.googlegroups.com>
Message-ID: <1186662352.731056.47190@q3g2000prf.googlegroups.com>

On Aug 6, 7:20 am, Paul Mansour <p... at carlislegroup.com> wrote:
> On Aug 5, 11:54 pm, Mike Kent <mk... at acm.org> wrote:
>
> > APL 2007 conference on Array Programming
>
> >      co-located with OOPSLA 2007
>
> > Sponsor:              ACM SIGAPL
>
> > Where:                Montreal
>
> > When:                 October 21 (tutorials)
> >                        October 22/23  (main conference program)
>
> APL2007 Roll Call: Is anyone going to this?
>
> I'm thinking about going, but I don't want to the only one to show up,
> as in San Diego.

I'm going.



From grante at visi.com  Tue Aug 28 22:03:25 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 29 Aug 2007 02:03:25 -0000
Subject: Gmane's been quiet ...
References: <mailman.88.1188343014.28954.python-list@python.org>
Message-ID: <13d9kvdm9tcqtae@corp.supernews.com>

On 2007-08-28, Steve Holden <steve at holdenweb.com> wrote:

> ... so I was wondering if it's just me who hasn't seen any postings today?

AFAICT, it's been dead for a day or so.  I posted something to
the py2exe list via the gmane NNTP server early this after noon
and it never showed up. I don't think I've seen any other new
articles today in any of the 20 or so lists I watch via gmane's
NNTP server.

The server appears to be fine (it's serving up headers and
ariticles like always), but the "news feed" seems to be down.

-- 
Grant Edwards                   grante             Yow!  Yow! I just went
                                  at               below the poverty line!
                               visi.com            


From nick at craig-wood.com  Wed Aug 22 06:30:06 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 22 Aug 2007 05:30:06 -0500
Subject: File Read Cache - How to purge?
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
	<87veb9xb7y.fsf@mulj.homelinux.net>
	<slrnfcm1hv.4r1.nick@irishsea.home.craig-wood.com>
	<87ir781afk.fsf@mulj.homelinux.net>
Message-ID: <slrnfco315.k3i.nick@irishsea.home.craig-wood.com>

Hrvoje Niksic <hniksic at xemacs.org> wrote:
>  Nick Craig-Wood <nick at craig-wood.com> writes:
> 
> > If you are running linux > 2.6.18 then you can use
> > /proc/sys/vm/drop_caches for exactly that purpose.
> >
> >   http://www.linuxinsight.com/proc_sys_vm_drop_caches.html
> 
>  That URL claims that you need to run "sync" before dropping the cache,
>  and so do other resources.  I wonder if that means that dropping the
>  cache is unsafe on a running system.

It isn't unsafe, the OS just can't drop pages which haven't been
synced to disk so you won't get all the pages dropped unless you sync
first.

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


From kyosohma at gmail.com  Thu Aug  2 15:50:40 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 02 Aug 2007 19:50:40 -0000
Subject: Error subclassing datetime.date and pickling
In-Reply-To: <mailman.1514.1186071067.22759.python-list@python.org>
References: <mailman.1514.1186071067.22759.python-list@python.org>
Message-ID: <1186084240.922922.11870@i13g2000prf.googlegroups.com>

On Aug 2, 11:02 am, Mike Rooney <m... at qvii.com> wrote:
> Hi everyone, this is my first post to this list. I am trying to create a
> subclass of datetime.date and pickle it, but I get errors on loading it
> back. I have created a VERY simple demo of this:
>
> import datetime
>
> class MyDate(datetime.date):
>     """
>     This should be pickleable.
>
>     >>> md = MyDate(2007, 1, 6)
>     >>> import pickle
>     >>> pickle.dump(md, open("test.pickle", 'w'))
>     >>> mdp = pickle.load(open("test.pickle"))
>     >>> import os; os.remove("test.pickle")
>     """
>     def __init__(self, y, m, d):
>         datetime.date.__init__(self, y, m, d)
>
> if __name__ == "__main__":
>     import doctest
>     doctest.testmod()
>
> The traceback that occurs is:
>
>     Traceback (most recent call last):
>       File "C:\Python25\lib\doctest.py", line 1212, in __run
>         compileflags, 1) in test.globs
>       File "<doctest __main__.MyDate[3]>", line 1, in <module>
>         mdp = pickle.load(open("test.pickle"))
>       File "C:\Python25\lib\pickle.py", line 1370, in load
>         return Unpickler(file).load()
>       File "C:\Python25\lib\pickle.py", line 858, in load
>         dispatch[key](self)
>       File "C:\Python25\lib\pickle.py", line 1133, in load_red
>         value = func(*args)
>     TypeError: __init__() takes exactly 4 arguments (2 given)
>
> I have found a few relating issues:
>  -https://sourceforge.net/tracker/?func=detail&atid=105470&aid=952807&g...
>  -http://sourceforge.net/tracker/index.php?func=detail&aid=720908&group...
>
> But these are both rather old and are marked as fixed. I am running
> Python 2.5.1 on Windows XP SP2. Any help here would be greatly appreciated!
>
> - Mike

I've never used pickle or shelve in my applications...yet. I tried
separating out the class into its own module and importing it, as
pickling classes is supposed to be tricky. I looked through all my
Python books and what few examples I found looked just like your code.

I did find this article which might be helpful to you more than it was
to me: http://www.ibm.com/developerworks/library/l-pypers.html

>From what I can tell, when your object gets unpickled it only passes 2
arguments to the class instead of the 4 that were supposed to be
pickled. If you change the number of arguments that the class accepts
and re-pickle it, you'll see that the unpickle object traceback
corresponds.

It's very weird. Sorry I didn't have some slam-bang awesome idea.

Mike



From JYOUNG79 at kc.rr.com  Fri Aug 24 14:20:24 2007
From: JYOUNG79 at kc.rr.com (JYOUNG79 at kc.rr.com)
Date: Fri, 24 Aug 2007 13:20:24 -0500
Subject: question
Message-ID: <c54792253f115.3f115c5479225@rdc-kc.rr.com>

Still trying to learn Python and was hoping some of you might be able to give me some advice 
on my code 
below.  It works but I'm wondering if there's more efficient ways of doing this than the way 
I've done it.

The first step is I have to loop thru nested folders and find all files that start with "LOGO".  So 
I use Unix's 'find' 
and write all the paths out to a text file like so:

find ~/Desktop/logoFiles/ -type f -iname "LOGO*" > ~/Desktop/logo_stuff/paths.txt"

Next, I use Python (code below) to look thru each paragraph of that file (paths.txt).  While 
looping thru each 
paragraph, I want to first make sure that the folder name that the file is in is a number.  For 
example, if it found 
file 'LOGO9012', then I'd want to make sure the folder name that this file was in was a 
number (~/Desktop/
logoFiles/12/LOGO9012).  If that's ok then I grab the number off the file name.  If there's not 
a number in the 
file name then I ignore it.  I then create a dictionary that has a key which equals the number I 
grabbed from the 
file name and then the value contains the full file path (that I grabbed out of the text file) 
followed by a 
delimiter (<::>) followed by 'LOGO' and the number I got from the file name (making sure to 
keep any leading 
zeroes if they were there originally).  Finally, I sort the keys in numerical order and save out a 
file with all the 
appropriate info from my dictionary (which will be a list of paths followed by a delimiter and 
file name).  Here's 
an example of what this new file might contain:

/Users/jyoung1/Desktop/logoFiles/02/Logo002<::>LOGO002
/Users/jyoung1/Desktop/logoFiles/02/LOGO102<::>LOGO102
/Users/jyoung1/Desktop/logoFiles/02/LOGO302<::>LOGO302
/Users/jyoung1/Desktop/logoFiles/9/LOGO462.2PMS<::>LOGO462


Anyway, if anyone has time to look at this I'd appreciate your thoughts.  Thanks!

Jay

#!/usr/bin/python

import re

dList = {}
sortedList = ""

pathFile = open("~/Desktop/logo_stuff/paths.txt", "r")

for x in pathFile:
  if len(re.findall(r"^\d+$", x.split("/")[-2])) > 0:  #make sure folder name is a number
    n = re.findall(r"\d+", x.split("/")[-1])   #Grab number off file name
    if len(n) > 0: dList[int(n[0])] = x[:-1] + "<::>LOGO" + n[0] + "\n"

pathFile.close()

keyList = dList.keys()
keyList.sort()

for x in keyList:
  sortedList += dList[x]

newFile = open("~/Desktop/logo_stuff/sortedPaths.txt", "w")
newFile.write(sortedList)
newFile.close()





From tleeuwenburg at gmail.com  Thu Aug 30 15:31:29 2007
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: Thu, 30 Aug 2007 19:31:29 -0000
Subject: Trouble using sys.settrace
Message-ID: <1188502289.484027.322520@z24g2000prh.googlegroups.com>

The code below produces no output. I would expect to see:

tracing...
tracing...
tracing...
tracing...
tracing...


I was wondering if anyone had any experience with this.

=================================
import sys

def mytrace(frame, event, arg):
    print "tracing..."

sys.settrace(mytrace)

def foo():
    for i in range(5):
        print i

foo()



From toby at tobiah.org  Thu Aug 23 15:27:10 2007
From: toby at tobiah.org (Tobiah)
Date: Thu, 23 Aug 2007 12:27:10 -0700
Subject: Using Regular Expresions to change .htm to .php in files
In-Reply-To: <1187896823.843419.53220@q3g2000prf.googlegroups.com>
References: <1187896823.843419.53220@q3g2000prf.googlegroups.com>
Message-ID: <46cdd386$0$27392$88260bb3@free.teranews.com>

sebzzz at gmail.com wrote:
> Hi,
> 
> I have a bunch of files that have changed from standard htm files to
> php files but all the links inside the site are now broken because
> they point to the .htm files while they are now .php files.
> 
> Does anyone have an idea about how to do a simple script that changes
> each .htm in a given file to a .php
> 
> Thanks a lot in advance
> 

#!/bin/bash

for each in *.php; do
	
	sed "s/.htm/.php/g" < $each > /tmp/$$
	mv /tmp/$$ $each
done


-- 
Posted via a free Usenet account from http://www.teranews.com



From rvtol+news at isolution.nl  Sat Aug 11 11:54:59 2007
From: rvtol+news at isolution.nl (Dr.Ruud)
Date: Sat, 11 Aug 2007 17:54:59 +0200
Subject: I am giving up perl because of assholes on clpm -- switching to
	Python
References: <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d@giganews.com>
	<1186242055.553090.112680@m37g2000prh.googlegroups.com>
Message-ID: <f9ktdc.1ho.1@news.isolution.nl>

grocery_stocker schreef:

> In the beginning there was Mathematics
> And all was good
> Then one day God said "Let there be the Lambda Calculus"
> And hence the Lambda Calculus was born.
> However, God felt the the Lambda Calculus needed a mate
> So god said "Let there be Lisp"
> And thus, Lisp was born.
> 
> As the years went on, god became depressed by how impure the Lisp had
> become.
> For from the Lisp, came Emacs Lisp, Java, Perl, Ruby, and Python.

http://xkcd.com/224/ 

-- 
Affijn, Ruud

"Gewoon is een tijger."


From bdesth.quelquechose at free.quelquepart.fr  Tue Aug  7 14:04:46 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 07 Aug 2007 20:04:46 +0200
Subject: check if regeular expression has results
In-Reply-To: <slrnfbm4vk.194.horpner@FIAD06.norwich.edu>
References: <1186664302.050036.302670@g4g2000hsf.googlegroups.com>
	<slrnfbm4vk.194.horpner@FIAD06.norwich.edu>
Message-ID: <46bb6ba1$0$424$426a74cc@news.free.fr>

Neil Cerutti a ?crit :
> On 2007-08-09, shahargs at gmail.com <shahargs at gmail.com> wrote:
> 
>>Hi,
>>I'm looking for the best way to check if regular expression return
>>true (it's mean - there is a match). for example, i want "if" that
>>check if this regular expression: .*born.*to.* has a match.
>>
>>What's the way to do that simply?
> 
> 
> Newgroups are a poor substitute for the docs. For one thing,
> newsgroups sometimes contain cranky people who say, "RTFM!" The
> docs will never do that.
> 
And for completness, here are the relevant parts of TheFineManual(tm):
http://docs.python.org/lib/module-re.html
http://www.amk.ca/python/howto/regex/


From johnmasters at oxtedonline.net  Wed Aug  1 18:42:19 2007
From: johnmasters at oxtedonline.net (John K Masters)
Date: Wed, 1 Aug 2007 23:42:19 +0100
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <f8r147$rvm$1@sea.gmane.org>
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
	<f8quug$m7j$1@sea.gmane.org>
	<496954360708011453h2a68dee4x48dcb15bb25ea717@mail.gmail.com>
	<f8r0du$qhn$1@sea.gmane.org> <f8r147$rvm$1@sea.gmane.org>
Message-ID: <20070801224219.GD25065@spookie1.spookiegate>

On 18:23 Wed 01 Aug     , Steve Holden wrote:
> Joshua J. Kugler wrote:
> > On Wednesday 01 August 2007 13:53, Robert Dailey wrote:
> >> He's secretly an employee of Wing IDE in disguise!!!
> > 
> > Sorry to destroy your conspiracy theories, but no, I've never been employed
> > by Wing IDE in any fashion, nor have I ever received any monetary
> > compensation from them in any form.  Just a satisfied user.  That's all.
> > 
> > j
> > 
> Me too, and I have to say the response I have had to all my technical 
> support requests has been first-class. Maybe they are busy because 
> they're in beta? I know they aren't the largest company, but they can 
> stand comparison with most when it comes to support.
> 
> I can't think of any other products I use where you can contact the 
> support team from right inside the software. And get answers without 
> paying per-incident support fees!
> 
> regards
>   Steve
> -- 

I am happy to hear that you have had a good experience with wingide and
I wish I could say the same as I have found the product to be excellent
as far as the concept goes but lacking in the implementation. 

To suggest that, because the autocompletion worked on one method of a
module and not on another was because I had not configured the
PYTHONPATH properly is at least insulting.

Regards, John
-- 
War is God's way of teaching Americans geography
uggest that mbrose Bierce (1842 - 1914)


From bignose+hates-spam at benfinney.id.au  Tue Aug  7 20:13:42 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 08 Aug 2007 10:13:42 +1000
Subject: ensuring GNU readline isn't used
References: <mailman.1711.1186491401.22759.python-list@python.org>
Message-ID: <87k5s67uix.fsf@benfinney.id.au>

Josh Paetzel <josh at tcbug.org> writes:

> Is there a way to ensure that GNU readline isn't used (even though
> support may have been compiled in?).  I'm experiencing a licensing
> problem

Note that the GPL (the license terms of readline) is like any other
valid copyright license in that it only restricts acts covered by
copyright. You have no responsibility to prevent others from using a
GPL-covered work.

Anyone may use a GPL-covered work they receive for any purpose without
further permission; nobody needs a copyright license for that (despite
what some copyright holders might prefer). Copyright covers acts of
copying and distribution, so you *do* need license to do those things
with someone's work.

> but my code is proprietary

That's unfortunate. I hope you can fix that.

> and hence, if cmd uses readline, I can't use cmd.

Not true; you can derive from and redistribute cmd, so long as you
comply with the license on cmd.

-- 
 \          "What I have to do is see, at any rate, that I do not lend |
  `\   myself to the wrong which I condemn."  -- Henry Thoreau, _Civil |
_o__)                                                    Disobedience_ |
Ben Finney


From kyoguan at gmail.com  Thu Aug 16 22:46:01 2007
From: kyoguan at gmail.com (kyo guan)
Date: Fri, 17 Aug 2007 10:46:01 +0800
Subject: why psyco using more memery in liunx?
Message-ID: <005d01c7e078$c13d0ed0$811ba8c0@kyom>

Hi all:

	When you import psyco in python2.5, you can see the memery grow up near 40MB in linux. but the same version python and
psyco, is only grow up 1MB under windows. 

kyo



From B.Ogryczak at gmail.com  Fri Aug 10 07:08:31 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: Fri, 10 Aug 2007 11:08:31 -0000
Subject: programmatically define a new variable on the fly
In-Reply-To: <1186697500.024593.303820@x35g2000prf.googlegroups.com>
References: <1186697500.024593.303820@x35g2000prf.googlegroups.com>
Message-ID: <1186744111.800625.232730@x40g2000prg.googlegroups.com>

On 10 ago, 00:11, Lee Sander <lesa... at gmail.com> wrote:
> Hi,
>
> I would like to define a new variable which is not predefined by me.
> For example,
> I want to create an array called "X%s" where "%s" is to be determined
> based on the data I am processing. So, for example, if I the file
> I'm reading has
> g 99
> on the first line, I want to create a new variable  called "Xg" whose
> length
> is 99.
> I tried eval("Xg=[0]*99") but that did not work.

>>> letter = 'g'
>>> import __main__
>>> setattr(__main__,'X%s'%letter,[0]*99)
>>> Xg
[0, 0, 0 ...

Anyway, I don?t see the point in this. Why don?t you just use
something like X['g'] instead?



From skip at pobox.com  Thu Aug  2 22:39:23 2007
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 3 Aug 2007 02:39:23 +0000 (UTC)
Subject: =?utf-8?b?X19jYWxsX18=?= considered harmful or indispensable?
References: <mailman.1527.1186079415.22759.python-list@python.org>
	<46b24200$0$19638$426a74cc@news.free.fr>
Message-ID: <loom.20070803T042845-57@post.gmane.org>

> > In this case there was a bug.  Depending on inputs, sometimes obj
> > initialized to a class, sometimes an instance of that class.  (I fixed
> > that too while I was at it.)  The problem was that the use of __call__
> > obscured the underlying bug by making the instance as well as the class
> > callable.

> I don't quite get the point here. A concrete example would be welcome.

The bug went something like this:

    obj = some.default_class
    ...
    if some_other_rare_condition_met:
        ... several lines ...
        obj = some.other_class()
    ...

Later,

    x = obj()
    x(...)

The bug was that in the rare condition branch obj should have been assigned
just the class.  It shouldn't have been instantiated there.  Having the
instance be callable (for no obvious reason that I could tell) misdirected
my attention because the x = obj() generally succeeded and I thought the
problem was with the call to x(...).  If the instance wasn't callable it
would have been clear at "x = obj()" that I was trying to call an instance.

Thanks for the various bits of feedback.  From the responses I've seen, it
seems that if one is tempted to use __call__ they should consider it before
just sprinkling it in their code.  The places where people seem to use it
generally seem not to be in run-of-the-mill code.  In the common case it
seems to me there are generally better ways to do things.  (I did like the
StoredProcedure mirroring stuff someone posted.  That does look kind of
cool.)

Skip




From horpner at yahoo.com  Wed Aug  1 11:11:18 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 01 Aug 2007 15:11:18 GMT
Subject: Extending doctest
Message-ID: <slrnfb18rk.lo.horpner@FIAD06.norwich.edu>

One of my current tests looks like this (the program is an
interpreter for a scheme-like language):

    >>> result = parse_op('(with (b (newbox 5))'
    ... '                   (seqn (setbox b 1)'
    ... '                         (setbox b 2)'
    ... '                         (setbox b 3)'
    ... '                         b))').interp(EmptyEnv(), EmptyStore())
    >>> result #doctest: +ELLIPSIS
    (<Box ...>, ~...: <Num 3> ~)
    >>> result[0].location == result[1].location
    True

The memrory location that the box refers to must match the actual
location in storage. Currently, the doctest stinks because it
depends on internal details of my implementation.

Is there a doctest feature that will allow me to stipulate that
one thing in a result is arbitrary, but identical to another
thing in that result?

-- 
Neil Cerutti
Trespassers will be prosecuted to the full extent of the law --sign at Sisters
of Mercy Nunnery


From carl at 29degrees.co.uk  Tue Aug 28 13:35:19 2007
From: carl at 29degrees.co.uk (Carl Drinkwater | 29degrees)
Date: Tue, 28 Aug 2007 18:35:19 +0100
Subject: National grid to lat long conversion
In-Reply-To: <1188295755.877801.217710@r29g2000hsg.googlegroups.com>
References: <1188295755.877801.217710@r29g2000hsg.googlegroups.com>
Message-ID: <E736173B-9678-44B3-86E5-0D71031445F9@29degrees.co.uk>

> I have a load of British National Grid references that I want to
> convert to decimal degrees so I can create a google KML file. Does
> anyone know of a module to do this?

I should probably have added that you can get a number of the  
variables you start off with from :

   http://www.ordnancesurvey.co.uk/oswebsite/gps/information/ 
coordinatesystemsinfo/guidecontents/guidea.html

and

   http://www.ordnancesurvey.co.uk/oswebsite/gps/information/ 
coordinatesystemsinfo/guidecontents/index.html

might be useful to read around the subject.  It might look complex,  
but don't let it put you off.  Also, you can get JavaScript code to  
do just this from the URL below, which would be a good starting point.

   http://www.movable-type.co.uk/scripts/latlong-gridref.html

Regards,
Carl.



From Dominic at PLEASEASK.co.uk  Thu Aug  9 09:59:07 2007
From: Dominic at PLEASEASK.co.uk (special_dragonfly)
Date: Thu, 9 Aug 2007 14:59:07 +0100
Subject: Help with Dictionaries and Classes requested please.
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
	<87ejic6dkw.fsf@benfinney.id.au>
Message-ID: <46bb19e2$0$9835$7b0f0fd3@mistral.news.newnet.co.uk>


"Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote in message 
news:87ejic6dkw.fsf at benfinney.id.au...
> "special_dragonfly" <Dominic at PLEASEASK.co.uk> writes:
>
>> I've managed to solve the problem, I really was just being a
>> dunce.
>
> Doubtful; but at this stage we can't tell, because we still don't know
> what it is you're actually trying to *do*.
>
>> Here's how incase anyone is wondering:
>>
>> class MyClass:
>>     def __init__(self):
>>         name=""
>> dict={}
>> dict[0]=[]
>> dict[0].append(MyClass())
>> dict[0][0].name="Hello"
>> print dict[0][0].name
>
> It's not clear why you are using the value 0 for a dictionary key
> here; nor why you're assigning an attribute to an object after
> creating the object. Neither of them are errors, but without context
> it's hard to know what advice to give.
>
The 0 for a key is just an example. The code I actually have would be just 
as meaningful at the end of the day. I could have changed MyClass for
class Animals(object):
    def __init__(self, name="", type="", age=""):
        self.name=name
        self.type=type
        self.age=age

dict={'Mouse':[Animals('George','long eared',20)]}
dict['Mouse'].append(Animals('Benny','hairy',30))
dict['Cat']=[Animals('Inigo Montoya','spanish',10)]

and Neil, Bruno has the right idea of what I was trying to do. However, your 
code came in handy still as I used your code elsewhere.see below.

def EnterDictionary(FieldsDictionary,key,data):
    for i in range(0,int(data[6:])):
        line=myfile.readline()
        line=line.strip()
        line=line[6:-1]
        if key in FieldsDictionary:
            FieldsDictionary[key].append(FieldClass(*line.split(",")))
        else:
            FieldsDictionary[key]=[FieldClass(*line.split(","))]

I'd like to thank you all for your patience with me whilst I've asked some 
really beginner-like questions. I hope I haven't annoyed you all too much...

In future I would ask however, if it's a really stupid question and you feel 
that the answer can be found either by searching google (because in some 
cases I don't know what to search for), or in one of the O'reilly books, 
just say. In either case, if you could refer me to the search term to use or 
the book to read I'd be grateful.

Dominic 




From tazmaster at rocketmail.com  Sat Aug  4 22:21:17 2007
From: tazmaster at rocketmail.com (Jim Langston)
Date: Sat, 4 Aug 2007 19:21:17 -0700
Subject: Formatting Results so that They Can be Nicely Imported into a
	Spreadsheet.
References: <1186270555.514649.311280@d30g2000prg.googlegroups.com>
	<1186278638.931477.39760@z24g2000prh.googlegroups.com>
Message-ID: <Avati.40$Tu1.6@newsfe12.lga>

<mensanator at aol.com> wrote in message 
news:1186278638.931477.39760 at z24g2000prh.googlegroups.com...
> On Aug 4, 6:35?pm, SMERSH009 <SMERSH0... at gmail.com> wrote:
>> Hi All.
>> Let's say I have some badly formatted text called doc:
>>
>> doc=
>> """
>> friendid
>> Female
>>
>>                             23 years old
>>
>>                             Los Gatos
>>
>>                             United States
>> friendid
>> Male
>>
>>                             24 years old
>>
>>                             San Francisco, California
>>
>>                             United States
>> """
>>
>> How would I get these results to be displayed in a format similar to:
>> friendid;Female;23 years old;Los Gatos;United States
>> friendid;Male; 24 years old;San Francisco, California;United States
>>
>> The latter is a lot easier to organize and can be quickly imported
>> into Excel's column format.
>>
>> Thanks Much,
>> Sam
>
> d = doc.split('\n')
>
> f = [i.split() for i in d if i]
>
> g = [' '.join(i) for i in f]
>
> rec = []
> temprec = []
> for i in g:
>    if i:
>        if i == 'friendid':
>            rec.append(temprec)
>            temprec = [i]
>        else:
>            temprec.append(i)
> rec.append(temprec)
>
> output = [';'.join(i) for i in rec if i]
>
> for i in output: print i
>
> ##    friendid;Female;23 years old;Los Gatos;United States
> ##    friendid;Male;24 years old;San Francisco, California;United States

also, I would suggest you use CSV format.  CSV stands for "Comma Seperated 
Variable" and Excel can load such a sheet directly.

Instead of seperating using ; seperate using ,  Of course, this provides a 
problem when there is a , in a string.  Resolution is to quote the string. 
Being such, you can just go ahead and quote all strings.  So you would want 
the output to be:

"friendid","Female","23 years old","Los Gatos","United States"
"friendid","Male","24 years old","San Francisco, California","United States"

Numbers should not be quoted if you wish to treat them as numeric and not 
text. 




From hniksic at xemacs.org  Wed Aug 22 07:58:08 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 22 Aug 2007 13:58:08 +0200
Subject: File Read Cache - How to purge?
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
	<87veb9xb7y.fsf@mulj.homelinux.net>
	<slrnfcm1hv.4r1.nick@irishsea.home.craig-wood.com>
	<87ir781afk.fsf@mulj.homelinux.net>
	<slrnfco315.k3i.nick@irishsea.home.craig-wood.com>
Message-ID: <874pirpyr3.fsf@mulj.homelinux.net>

Nick Craig-Wood <nick at craig-wood.com> writes:

>> >   http://www.linuxinsight.com/proc_sys_vm_drop_caches.html
>> 
>>  That URL claims that you need to run "sync" before dropping the cache,
>>  and so do other resources.  I wonder if that means that dropping the
>>  cache is unsafe on a running system.
>
> It isn't unsafe, the OS just can't drop pages which haven't been
> synced to disk so you won't get all the pages dropped unless you
> sync first.

Thanks for the clarification.


From google at tyeon.com  Thu Aug 30 13:29:24 2007
From: google at tyeon.com (T)
Date: Thu, 30 Aug 2007 10:29:24 -0700
Subject: How to use os.putenv() ?
In-Reply-To: <1188438641.676443.121510@x35g2000prf.googlegroups.com>
References: <1188436871.549201.315170@g4g2000hsf.googlegroups.com>
	<1188438641.676443.121510@x35g2000prf.googlegroups.com>
Message-ID: <1188494964.539169.104180@d55g2000hsg.googlegroups.com>

On Aug 29, 9:50 pm, Graham Dumpleton <Graham.Dumple... at gmail.com>
wrote:
> On Aug 30, 11:21 am, goo... at tyeon.com wrote:
>
>
>
> > >>> import os
>
> > >>> os.environ['PATH']
>
> > 'C:\\WINNT\\system32;C:\\WINNT;C:\\WINNT\\System32\\Wbem;%C:\\WINNT%\
> > \system32;%C:\\WINNT%;%C:\\WINNT%\\System32\\Wbem'
>
> > >>> os.putenv('PATH', 'C:\\WINNT\\system32')
>
> > >>> os.environ['PATH']
>
> > 'C:\\WINNT\\system32;C:\\WINNT;C:\\WINNT\\System32\\Wbem;%C:\\WINNT%\
> > \system32;%C:\\WINNT%;%C:\\WINNT%\\System32\\Wbem'
>
> > What am I doing wrong?  How do I change the value of an environment
> > variable?
>
> What you are missing is that os.environ is only populated from the
> global process environment at process startup.
>
> If you update os.environ the changes will be pushed into the global
> process environment as well. But if you use os.putenv() instead,
> bypassing os.environ, the changes will not show in os.environ.
>
> To confirm that the global process environment is being updated, use
> os.getenv().
>
> Graham

Can you tell me what I am still missing please?

>>> import os
>>>
>>> os.getenv('PATH')
'C:\\WINNT\\system32;C:\\WINNT;C:\\WINNT\\System32\\Wbem;%C:\\WINNT%\
\system32;%C:\\WINNT%;%C:\\WINNT%\\System32\\Wbem'
>>>
>>> os.putenv('PATH', 'C:\\WINNT\\system32')
>>>
>>> os.getenv('PATH')
'C:\\WINNT\\system32;C:\\WINNT;C:\\WINNT\\System32\\Wbem;%C:\\WINNT%\
\system32;%C:\\WINNT%;%C:\\WINNT%\\System32\\Wbem'
>>>



From prey at cesga.es  Thu Aug 30 07:46:47 2007
From: prey at cesga.es (Pablo Rey)
Date: Thu, 30 Aug 2007 13:46:47 +0200
Subject: SAXParseException: not well-formed (invalid token)
Message-ID: <fb6alc$pfj$1@news.cesga.es>

	Dear Colleagues,

	I am getting the following error with a XML page:

>   File "/home/prey/RAL-CESGA/bin/voms2users/voms2users.py", line 69, in getItems
>     d = minidom.parseString(xml.read())
>   File "/usr/lib/python2.2/site-packages/_xmlplus/dom/minidom.py", line 967, in parseString
>     return _doparse(pulldom.parseString, args, kwargs)
>   File "/usr/lib/python2.2/site-packages/_xmlplus/dom/minidom.py", line 954, in _doparse
>     toktype, rootNode = events.getEvent()
>   File "/usr/lib/python2.2/site-packages/_xmlplus/dom/pulldom.py", line 265, in getEvent
>     self.parser.feed(buf)
>   File "/usr/lib/python2.2/site-packages/_xmlplus/sax/expatreader.py", line 208, in feed
>     self._err_handler.fatalError(exc)
>   File "/usr/lib/python2.2/site-packages/_xmlplus/sax/handler.py", line 38, in fatalError
>     raise exception
> xml.sax._exceptions.SAXParseException: <unknown>:553:48: not well-formed (invalid token)


> def getItems(page):
>     opener =urllib.URLopener(key_file=HOSTKEY,cert_file=HOSTCERT) ;
>     try:
>        xml = opener.open(page)
>     except:
>        return []
> 
>     d = minidom.parseString(xml.read())
>     items = d.getElementsByTagName('item')
>     data = []
>     for i in items:
>        data.append(getText(i.childNodes))
> 
>     return data

	The page is 
https://lcg-voms.cern.ch:8443/voms/cms/services/VOMSCompatibility?method=getGridmapUsers 
and the line with the invalid character is (the invalid character is the 
final ? of Universit?):

<item>/C=BE/O=BEGRID/OU=Physique/OU=Univesit? Catholique de 
Louvain/CN=Roberfroid</item>


	I have tried several options but I am not able to avoid this problem. 
Any idea?.

	I am starting to work with Python so I am sorry if this problem is trivial.

	Thanks for your time.
	Pablo Rey


From stefan.behnel-n05pAM at web.de  Fri Aug 31 04:31:23 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 31 Aug 2007 10:31:23 +0200
Subject: Simple elementtree question
In-Reply-To: <1188512190.384302.125730@m37g2000prh.googlegroups.com>
References: <1188495178.701968.246690@50g2000hsm.googlegroups.com>
	<46D71A5E.1000005@web.de>
	<1188512190.384302.125730@m37g2000prh.googlegroups.com>
Message-ID: <46D7D1DB.6020605@web.de>

IamIan wrote:
> Thank you very much! That did it.
> 
> In the source XML <item> tags have rdf:about attributes with the link
> to the story, and it was here I planned on grabbing the link and
> matching it up with the <title> child text. After seeing the output of
> elmenttree's getiterator() though, it now looks like each item, title,
> description, and link is a separate element...
> 
> I could use a dictionary or lists to match the first title to the
> first link, but is there a more elegant way in elementtree (or
> otherwise) to do this?

You can iterate over the channel Elements and then select the title child
(el.find()) to see if it's interesting.

You can also try lxml.etree, which supports XPath:

   >>> from lxml import etree
   >>> find_channel = etree.XPath("//channel[title = $title]")

   >>> tree = etree.parse("http://somewhere/the_document.xml")
   >>> channel = find_channel(tree, title="example title")

   >>> print channel.findtext("link")

or lxml.objectify:

   >>> from lxml import etree, objectify
   >>> find_channel = etree.XPath("//channel[title = $title]")

   >>> tree = objectify.parse("http://somewhere/the_document.xml")
   >>> channel = find_channel(tree, title="example title")

   >>> print channel.title, channel.link

http://codespeak.net/lxml

Stefan


From jstroud at mbi.ucla.edu  Sun Aug 19 22:11:35 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 19 Aug 2007 19:11:35 -0700
Subject: Syntax Question - list multiplication
In-Reply-To: <mn.9d997d78fb085e82.46195@XX.XmclaveauX.com>
References: <1187560273.146491.90530@r29g2000hsg.googlegroups.com>
	<mn.9d997d78fb085e82.46195@XX.XmclaveauX.com>
Message-ID: <46C8F857.1010603@mbi.ucla.edu>

MC wrote:
> Classic

Thanks Michel, but maybe this bit of programming jargon needs some 
translation for the uninitiated:

Classic \Clas"sic\ (kl[a^]s"s[i^]k), Classical \Clas"sic*al\, a.
0. Read the FAQ
1. First rate
2. Greek
3. Refined

James


-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Aug  7 03:46:38 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 07 Aug 2007 09:46:38 +0200
Subject: boolean operations on sets
In-Reply-To: <1186409631.147290.323400@22g2000hsm.googlegroups.com>
References: <1186409631.147290.323400@22g2000hsm.googlegroups.com>
Message-ID: <46b82347$0$6945$426a74cc@news.free.fr>

Flavio a ?crit :
> Hi, I have been playing with set operations lately and came across a
> kind of surprising result given that it is not mentioned in the
> standard Python tutorial:
> 
> with python sets,   intersections  and unions are supposed to be done
> like this:
> In [7]:set('casa') & set('porca')
> Out[7]:set(['a', 'c'])
> 
> In [8]:set('casa') | set('porca')
> Out[8]:set(['a', 'c', 'o', 'p', 's', 'r'])
> 
> and they work correctly. Now what is confusing is that if you do:
> 
> In [5]:set('casa') and set('porca')
> Out[5]:set(['a', 'p', 'c', 'r', 'o'])
> 
> In [6]:set('casa') or set('porca')
> Out[6]:set(['a', 'c', 's'])
> 
> The results are not what you would expect from an AND  or OR
> operation, from the mathematical point of view! aparently the "and"
> operation is returning the the second set, and the "or" operation is
> returning the first.

the semantic of 'and' and 'or' operators in Python is well defined and 
works the same for all types AFAIK.

> If python developers wanted these operations to reflect the
> traditional (Python) truth value for data structures: False for empty
> data structures and True otherwise, why not return simply True or
> False?
>
> So My question is: Why has this been implemented in this way? 

Because Python long lived without the 'bool' type - considering None, 
numeric zero, empty string and empty containers as false (ie : 
'nothing', and anything else as true (ie : 'something').

> I can
> see this confusing many newbies...

Yes, and this has been one of the arguments against the introduction of 
the bool type. Changing this behaviour would have break lot of existing 
code, and indeed, not changing it makes things confusing.

OTHO - and while I agree that there may be cases of useless complexities 
in Python -, stripping a language from anything that might confuse a 
newbie doesn't make great languages.


From dfabrizio51 at gmail.com  Fri Aug 17 09:27:24 2007
From: dfabrizio51 at gmail.com (chewie54)
Date: Fri, 17 Aug 2007 13:27:24 -0000
Subject: best GUI library for vector drawing program
Message-ID: <1187357244.883516.79840@j4g2000prf.googlegroups.com>

Hello,

What would be the best cross-platform GUI library to use for a vector
based CAD program ( something like Visio on Windows )   WxWidgets,
Tk,   PyQt,  Java Swing,  Java SWT,????   I need the capibility to
draw and edit in a window that looks like a page of paper so WYSIWYG
is very important,  and I need to save the drawings in vector based
file formats like PS, EPS,  SVG, as well as image formats like jpg,
png, and gif.  Also, the images need to be high resolution so that
they can be pasted into various other programs in Windows OS,  and
Linux OS,  and the Mac OS.

Thanks in advance,
Dan



From Eric_Dexter at msn.com  Wed Aug  8 20:05:37 2007
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: Wed, 08 Aug 2007 17:05:37 -0700
Subject: Launch file from Python
In-Reply-To: <1186601943.551097.82360@j4g2000prf.googlegroups.com>
References: <1186594137.971393.128780@57g2000hsv.googlegroups.com>
	<1186594611.490723.251870@m37g2000prh.googlegroups.com>
	<mailman.1764.1186601788.22759.python-list@python.org>
	<1186601943.551097.82360@j4g2000prf.googlegroups.com>
Message-ID: <1186617937.241625.121270@q75g2000hsh.googlegroups.com>

On Aug 8, 2:39 pm, kyoso... at gmail.com wrote:
> On Aug 8, 2:35 pm, Arnau Sanchez <ar... at ehas.org> wrote:
>
>
>
>
>
> > kyoso... at gmail.com escribi?:
>
> > > That's just the exit status or run status, if I recall correctly. I
> > > think 0 (i.e. False) means it didn't run properly and anything else is
> > > True, or ok. Something like that.
>
> > The other way: 0 means "ok" while everything else means error (at least in
> > UNIX). The reason is clear: there is usually only one way to do things well, but
> > many to fail :-)
>
> > > Technically speaking, you should
> > > probably switch to using the subprocess module as it is replacing that
> > > os module's functionality:http://www.python.org/doc/2.4/lib/module-subprocess.html
>
> > Correct, subprocess replaces low-level os.system, os.popen*, os.spawn*, popen*
> > functions.
>
> Figures...I couldn't find the docs on it though...and I do know that
> some Windows programs return goofy numbers in the 1000s that mean it
> worked fine. So, in other words, the return value isn't very helpful.
>
> Mike- Hide quoted text -
>
> - Show quoted text -


I had used popen on windows and had to seperate the arguments out..
(example is in my awk module in dex tracker on sourceforge)..  What
you did may not work on windows.



From bj_666 at gmx.net  Tue Aug  7 04:05:19 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Aug 2007 08:05:19 GMT
Subject: Regular Expression Groups - loop
References: <1186472689.488634.23360@b79g2000hse.googlegroups.com>
Message-ID: <5hqndvF3ldifeU4@mid.uni-berlin.de>

On Tue, 07 Aug 2007 00:44:49 -0700, shahargs wrote:

> I'm trying to write application which parse one page to sentences and
> then, check every group for few things.
> 
> The code:
> 		rawstr = r"""([^.?!]+[.?!])"""
> 		regex=re.compile(rawstr)
> 		matchs=regex.search(document)
> document, is the text i parsing. I cheked it in Kodos, and everything
> worked well. but, i'm trying to write for loop which check every
> group.
> 
> I tried:
> 		for group in matchs.groups():
> but then, it's check only the first group. and i tried:

There is only one group in your regular expression.  I guess you are
confusing groups within one match with multiples matches in the text. 
`re.search()` finds exactly one sentence.  If you want all sentences use
`re.find_all()` or `re.find_iter()`.

Ciao,
	Marc 'BlackJack' Rintsch


From raims at dot.com  Mon Aug 13 05:21:05 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Mon, 13 Aug 2007 11:21:05 +0200
Subject: retrieving ATOM/FSS feeds
References: <f9oecg$249v$1@sxnews1.qg.com>
Message-ID: <1i2s7c9.13bkwbfsd3mbqN%raims@dot.com>

_spitFIRE <timid.gentoo at gmail.com> wrote:
>   I'm using feedparser library to parser ATOM/RSS feeds. However, I don't
> get the entire post! but only summaries! How do I retrieve the entire feed?
> I believe that the parser library should have support for doing that or the
> specification should detail how it can be done? Or should I simply get the
> feed link and do HTML scraping?

If the content producer doesn't provide the full article via RSS/ATOM
there's no way you can get it from there. Search for full content feeds
if any, otherwise get the article URL and feed it to BeautifulSoup to
scrape the content.

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From DustanGroups at gmail.com  Thu Aug  9 18:30:08 2007
From: DustanGroups at gmail.com (Dustan)
Date: Thu, 09 Aug 2007 22:30:08 -0000
Subject: programmatically define a new variable on the fly
In-Reply-To: <1186697500.024593.303820@x35g2000prf.googlegroups.com>
References: <1186697500.024593.303820@x35g2000prf.googlegroups.com>
Message-ID: <1186698608.818912.180370@e16g2000pri.googlegroups.com>

On Aug 9, 5:11 pm, Lee Sander <lesa... at gmail.com> wrote:
> Hi,
>
> I would like to define a new variable which is not predefined by me.
> For example,
> I want to create an array called "X%s" where "%s" is to be determined
> based on the data I am processing. So, for example, if I the file
> I'm reading has
> g 99
> on the first line, I want to create a new variable  called "Xg" whose
> length
> is 99.
> I tried eval("Xg=[0]*99") but that did not work.

eval only evaluates expressions. To go about the problem that way, you
would use exec, not eval.

Of course, use of exec generally means you're going about the problem
the wrong way; it looks to me like a better way to do what you're
doing is to create a dictionary to hold your values. So, given the
variables data (the dictionary), name (in your example, 'g') and
*size* (in your example, 99), you can add it  data as shown:

data[name] = [0]
data[name] *= size

Note that by splitting the '[0]*size' code into two lines as shown
above, you don't create an intermediate list object that gets thrown
away right after creation.



From antroy at gmail.com  Wed Aug 29 15:28:00 2007
From: antroy at gmail.com (Ant)
Date: Wed, 29 Aug 2007 12:28:00 -0700
Subject: sys.argv is munging my command line options
In-Reply-To: <1188414714.645724.63330@i38g2000prf.googlegroups.com>
References: <1188414714.645724.63330@i38g2000prf.googlegroups.com>
Message-ID: <1188415680.744407.21190@r34g2000hsd.googlegroups.com>

On Aug 29, 8:11 pm, Chris Allen <ca.al... at gmail.com> wrote:
...
> But I'm running into a problem with this which is that sys.argv splits
> my key=value options.  I need to know the option associations, and
> there's no way to know this by inspecting sys.argv.  Can I get access
> to the command line string as python saw it before it split it into
> sys.argv or is there another way?  Thanks.

Could you show us some example code that demonstrates this? The
following works as expected for me on win32:

# test.py
import sys

for arg in sys.argv[1:]:
	print arg

>From the command prompt:

C:\0>test.py action key=value key=value
action
key=value
key=value

--
Ant.



From tunedstyle at gmail.com  Thu Aug 16 11:18:29 2007
From: tunedstyle at gmail.com (tunedstyle at gmail.com)
Date: Thu, 16 Aug 2007 08:18:29 -0700
Subject: Car Air Conditioners
Message-ID: <1187277509.218923.177520@b79g2000hse.googlegroups.com>

All the informations about car air conditioners, how to install,
repair, service all can be found on this website...

http://car-air-conditioning.blogspot.com/



From ptmcg at austin.rr.com  Fri Aug 17 00:27:11 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Thu, 16 Aug 2007 21:27:11 -0700
Subject: defaultdict of arbitrary depth
In-Reply-To: <mailman.2098.1187324422.22759.python-list@python.org>
References: <1187321113.841198.195100@22g2000hsm.googlegroups.com>
	<mailman.2098.1187324422.22759.python-list@python.org>
Message-ID: <1187324831.082493.190970@w3g2000hsg.googlegroups.com>

On Aug 16, 11:19 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> On Thu, 2007-08-16 at 20:25 -0700, Paul McGuire wrote:
> > [...]
> > I've hacked out this recursivedefaultdict which is a
> > defaultdict(defaultdict(defaultdict(...))), arbitrarily deep depending
> > on the keys provided in the reference.
>
> > Please comment.
> > [...]
>
> > class recursivedefaultdict(object):
> >     def __init__(self):
> >         self.__dd = defaultdict(recursivedefaultdict)
> >     def __getattr__(self,attr):
> >         return self.__dd.__getattribute__(attr)
> >     def __getitem__(self,*args):
> >         return self.__dd.__getitem__(*args)
> >     def __setitem__(self,*args):
> >         return self.__dd.__setitem__(*args)
>
> This is shorter:
>
> from collections import defaultdict
>
> class recursivedefaultdict(defaultdict):
>     def __init__(self):
>         self.default_factory = type(self)
>
> --
> Carsten Haesehttp://informixdb.sourceforge.net- Hide quoted text -
>
> - Show quoted text -

Of course, very short and sweet!  Any special reason you wrote:
        self.default_factory = type(self)
instead of:
        self.default_factory = recursivedefaultdict
?


-- Paul



From paddy3118 at googlemail.com  Mon Aug 13 16:08:49 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Mon, 13 Aug 2007 13:08:49 -0700
Subject: Dictionary viewer and editor
In-Reply-To: <mailman.1932.1187032259.22759.python-list@python.org>
References: <46C09E65.6060607@indiana.edu>
	<mailman.1932.1187032259.22759.python-list@python.org>
Message-ID: <1187035729.100326.241440@57g2000hsv.googlegroups.com>

On Aug 13, 8:10 pm, Thomas Jollans <tho... at jollans.com> wrote:
> On Monday 13 August 2007, Ariel Balter wrote:
>
> >http://mail.python.org/pipermail/python-list/2001-August/100288.html
>
> > Did you ever finish writing this?
>
> YAML (without flow style) could qualify as "tree format". example:
>
> yaml.dump ( {"alpha": 1, "beta": 2, "otherstuff": {"bug": None, "cool":
> True, "foo": ["bar", 2e64, {13: 'many eyes', 14: 'make all', 15: 'bugs
> shallow'}]}}, default_flow_style=False )
>
> ... is ...
>
> alpha: 1
> beta: 2
> otherstuff:
>   bug: null
>   cool: true
>   foo:
>   - bar
>   - !!float '2e+64'
>   - 13: many eyes
>     14: make all
>     15: bugs shallow

I thought he wanted something graphical, but if text will do there is
the PrettyPrint module...

- Paddy.



From carsten at uniqsys.com  Thu Aug 16 22:32:19 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 16 Aug 2007 22:32:19 -0400
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187311999.880853.135780@j4g2000prf.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<fa2m4s$k1g$1@daisy.noc.ucla.edu>
	<1187311999.880853.135780@j4g2000prf.googlegroups.com>
Message-ID: <1187317939.3333.12.camel@localhost.localdomain>

On Fri, 2007-08-17 at 00:53 +0000, beginner wrote:
> $b is supposed to be a hash-table of hash-table. If a key exists in
> $b, it points to another hash table. The $a=$b->{"A"} ||={} pattern is
> useful when you want to add records to the double hash table.
> 
> For example, if you have a series of records in the format of (K1, K2,
> V), and you want to add them to the double hash-table, you can do
> $a=$b->{K1} || ={}
> $a->{K2}=V

What is the best solution in Perl need not be the best solution in
Python. In Python you should just use a tuple as your dict key, i.e.
a[k1,k2] = v, unless you have some other constraints you're not telling
us.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From steve at holdenweb.com  Fri Aug 17 20:42:28 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 17 Aug 2007 20:42:28 -0400
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187395351.199508.111720@m37g2000prh.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>	<1187314114.873306.187500@e9g2000prf.googlegroups.com>	<1187316113.424465.34650@19g2000hsx.googlegroups.com>
	<1187395351.199508.111720@m37g2000prh.googlegroups.com>
Message-ID: <fa5f9c$hf2$1@sea.gmane.org>

Carl Banks wrote:
> On Aug 16, 10:01 pm, Paul McGuire <pt... at austin.rr.com> wrote:
>> On Aug 16, 8:28 pm, Jonathan Gardner
>>
>>
>>
>> <jgardner.jonathangardner.... at gmail.com> wrote:
>>> On Aug 16, 3:35 pm, beginner <zyzhu2... at gmail.com> wrote:
>>>> In perl it is just one line: $a=$b->{"A"} ||={}.
>>> a = b.setdefault('A', {})
>>> This combines all two actions together:
>>> - Sets b['A'] to {} if it is not already defined
>>> - Assigns b['A'] to a
>>> More info on dict methods here:
>>> http://docs.python.org/lib/typesmapping.html
>> No, this has already been proposed and discarded.  The OP does NOT
>> want this, because it always generates an empty {} whether it is
>> needed or not.  Not really a big hardship, but if the default value
>> were some expensive-to-construct container class, then you would be
>> creating one every time you wanted to reference a value, on the chance
>> that the key did not exist.
>>
>> Carl Banks' post using defaultdict is the correct solution.  The
>> raison d'etre for defaultdict, and the reason that it is the solution
>> to the OP's question, is that instead of creating a just-in-case
>> default value every time, the defaultdict itself is constructed with a
>> factory method of some kind (in practice, it appears that this factory
>> method is usually the list or dict class constructor).  If a reference
>> to the defaultdict gives a not-yet-existing key, then the factory
>> method is called to construct the new value, that value is stored in
>> the dict with the given key, and the value is passed back to the
>> caller.  No instances are created unless they are truly required for
>> initializing an entry for a never-before-seen key.
> 
> 
> When I made my response, it occurred to me that Python could be
> improved (maybe) if one could overload dict.get() to use a factory,
> like so:
> 
> b = {}
> a = b.get(k,factory=dict)
> a['A'] = 1
> 
> That's a slight improvement (maybe) over defaultdict since it would
> still allow the same dict to have the membership check in other
> places.  I'm not so sure overloading get to let it modify the dict is
> a good idea, though.
> 
> Actually, it'd probably be fairly uncontroversial to add a factory
> keyword to dict.setdefault().  At least insofar as setdefault is
> uncontroversial.
> 
Well it's uncontroversial enough to have made it into the distribution, 
which represents a tacit admission by Guido that the .get() method alone 
didn't implement his full vision.

The python-dev thread that discussed the feature before implementation 
(as so often is the case) exercised many of the possible design paths, 
and would be a useful read. [Damn, now I have to 
well-known-search-engine it]. Aah, right - I'd forgotten how long it 
took to get it right. This would be a suitable starting-point - it's the 
beginning of the /third/ round of discussion:

   http://mail.python.org/pipermail/python-dev/2006-February/061485.html

Many alternatives were discussed, and my memory at this distance is that 
Guido had good reasons for choosing the exact API he did for defaultdict.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From nmin at freenet.de  Tue Aug 14 05:54:57 2007
From: nmin at freenet.de (nmin at freenet.de)
Date: Tue, 14 Aug 2007 02:54:57 -0700
Subject: Jython - problem import os
In-Reply-To: <mailman.1769.1186616127.22759.python-list@python.org>
References: <1186575029.494729.327550@b79g2000hse.googlegroups.com>
	<mailman.1769.1186616127.22759.python-list@python.org>
Message-ID: <1187085297.163751.257670@k79g2000hse.googlegroups.com>

Thats it ...

Additionally I had to set the python path with sys.path.append to the
Lib folder .. and now it works perfect.

thanks a lot

Simon



From ldo at geek-central.gen.new_zealand  Fri Aug 31 23:49:39 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 15:49:39 +1200
Subject: Python Unicode to String conversion
References: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
Message-ID: <fbanbu$smu$1@lust.ihug.co.nz>

In message <1188600916.528901.189680 at d55g2000hsg.googlegroups.com>, 
thijs.braem at gmail.com wrote:

> The error I keep having is something like this:
> ERREUR:  S?quence d'octets invalide pour le codage ?UTF8? : 0xe02063

It would be useful to see some actual code snippet, traceback listing etc.


From arnodel at googlemail.com  Thu Aug 30 17:51:30 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 30 Aug 2007 14:51:30 -0700
Subject: Setting a read-only attribute
In-Reply-To: <1188509700.915517.178440@z24g2000prh.googlegroups.com>
References: <1188509700.915517.178440@z24g2000prh.googlegroups.com>
Message-ID: <1188510690.622808.247220@z24g2000prh.googlegroups.com>

On Aug 30, 10:35 pm, "tleeuwenb... at gmail.com" <tleeuwenb... at gmail.com>
wrote:
> I have an object and wish to set an attribute on it which,
> unfortunately for me, is read-only.

If it's read-only then you can't set it!

> How can I go about this?

Joke aside, I think you need to be more specific.

--
Arnaud




From wescpy at gmail.com  Thu Aug 23 03:43:53 2007
From: wescpy at gmail.com (wesley chun)
Date: Thu, 23 Aug 2007 00:43:53 -0700
Subject: [ANN] Python courses this Fall
Message-ID: <78b3a9580708230043k35ff6729vc7fefefb2068531b@mail.gmail.com>

Folks, I'd like to announce my final Python courses for 2007:

Need to get up-to-speed with Python as quickly as possible? Come join
me, Wesley Chun, author of Prentice-Hall's well-received "Core Python
Programming," for another set of courses this Fall in beautiful
Northern California! This will be the final set for 2007... if you
miss these, you'll have to wait until next year. I look forward to
meeting you!
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(COMPREHENSIVE) INTRODUCTION TO PYTHON: Mon-Wed, 2007 Oct 8-10

This is course is meant for those new to Python and/or want to get
more in-depth formal training. We will immerse you in the world of
Python in only a few days.  We will show you more than just its syntax
(which you don't really need a book to learn, right?). Knowing more
about how Python works under the covers, including the relationship
between data objects and memory management, will make you a much more
effective Python programmer coming out of the gate.  3 hands-on labs
each day will help hammer the concepts home.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
INTERNET PROGRAMMING WITH PYTHON: Sat, 2007 Oct 13

This 1-day course will introduce current Python programmers to 3
distinct areas of Internet programming, each in self-contained modules
with a set of lab exercises following each lecture topic:

Network Programming using Sockets -- Underneath all of today's network
protocols, i.e., HTTP, FTP, RDBMS, IM, e-mail, etc., lies the main
communication mechanism, sockets. Here, we introduce client/server
architecture and how to program sockets using Python.

Internet Client Programming -- One level above the socket layer are
well-known Internet protocols such as FTP, NNTP, POP3, and SMTP.  In
this section, we learn how to create Internet clients of these
protocols to transfer files, send and receive e-mail, and read Usenet
newsgroup postings.

Web/CGI Programming -- Yes, pure CGI is "sooo yesterday," but before
you jump on all the web framework bandwagons, it's a good idea to
learn basics and the basis of how all web servers deliver dynamic
content back to the client browser so that you can appreciate all the
work that is done on your behalf by a more fully-featured frame- work.
Time-permitting, we will also give a high-level overview of one of the
more popular Python web frameworks, Django.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

WHERE: near the San Francisco Airport (SFO/San Bruno), CA, USA

WEB:   http://cyberwebconsulting.com (click "Python Training")

LOCALS: easy freeway (101/280/380) with lots of parking plus public
transit (BART and CalTrain) access via the San Bruno stations, easily
accessible from all parts of the Bay Area

VISITORS: free shuttle to/from the airport, free high-speed internet,
free breakfast and regular evening receptions; fully-equipped suites

See website for costs, venue info, and registration.  Discounts are
available for multiple registrations as well as for teachers/students.

Hope to see you there!
-- wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com


From wildemar at freakmail.de  Fri Aug 24 12:44:15 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Fri, 24 Aug 2007 18:44:15 +0200
Subject: How to replace a method in an instance.
In-Reply-To: <alpine.LFD.0.999.0708241223480.30194@saturn.syslang.net>
References: <mailman.258.1187971369.32294.python-list@python.org>	<1187971953.261328.219000@q3g2000prf.googlegroups.com>
	<alpine.LFD.0.999.0708241223480.30194@saturn.syslang.net>
Message-ID: <46CF0ADF.9050305@freakmail.de>

Steven W. Orr wrote:
> Sorry. I need repmeth to have self passed to it automatically if it's 
> called. I didn't mean to obfuscate the problem by not making a reference 
> to self in repmeth. 
>
> Am I being clear?
>
>   
Sort of. Maybe you fare better if you state what you want to achieve, 
instead of how you think you should do it. Chances are you don't need to 
replace a method in __init__, but there's another, less tricky way.

/W


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Aug  2 17:37:03 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 02 Aug 2007 23:37:03 +0200
Subject: Representation of new-style instance
References: <mailman.1467.1186011333.22759.python-list@python.org>
Message-ID: <5hf13vF3knjorU1@mid.individual.net>

Raj B wrote:

> Which C struct in the Python implementation is used to represent
> the instances c1 and c2 of the new-style class? 

You don't try to send this raw over some stream connection, do you?

Regards,


Bj?rn

-- 
BOFH excuse #349:

Stray Alpha Particles from memory packaging caused Hard Memory Error
on Server.



From joshua at eeinternet.com  Wed Aug  1 18:55:49 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 01 Aug 2007 14:55:49 -0800
Subject: Wing IDE for Python v. 3.0 beta1 released
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
	<f8quug$m7j$1@sea.gmane.org>
	<20070801221522.GC25065@spookie1.spookiegate>
Message-ID: <f8r31l$sa$1@sea.gmane.org>

On Wednesday 01 August 2007 14:15, John K Masters wrote:
>> > I have been trying wing for a few days but have noticed that
>> > auto-completion does not work on all modules. I submitted this to wing
>> > and was told that probably my PYTHONPATH was wrong.
>> It may also not work if the IDE isn't sure what kind of object you are
>> dealing with.  You can "clarify" this as documented with an
>> assert(isinstance()) statement.
> But as I pointed out to the wingware people the autocompletion was
> recognising some methods but not others from the same module,

I just remembered: I've been around the block with them on this one too.  It
was with PyTables.  There are some modules (PyTables includes) that use
certain names that are valid when called, but are no where defined in the
module.  Yes, it happens, and yes, it sounds quite tweaky.  I can dig up
details if you want me to.  But, since the names are defined, basically, at
run time, there is no way Wing can find them for autocompletion.

>> > I subsequently submitted a question about the licensing, i.e. whether I
>> > could use wing on a home setup using Debian Etch, where I develop my
>> > apps, and a work setup, using Debian Etch, with no net access.
>> 
>> From http://www.wingware.com/wingide/license:
>> 
>> "Each Wing IDE user may run Wing on as many machines as needed for their
>> own work, for all the operating systems which they have licensed. In
>> order to reduce casual license sharing, which is a unfortunately a
>> problem for small businesses like Wingware, licenses must be activated
>> after installation on each machine."
>> 
>> "We've worked hard to make this flexible and forgiving for valid
>> customers. For example, reinstalling an OS and/or altering hardware
>> usually should not break your activation. Also, activation can be done
>> directly from Wing IDE and off-line activation is available if your
>> machine does not have TCP port 80 (http) access to wingware.com. Each
>> license is allowed three activations by default and more can be obtained
>> on request from identifiable customers."
>> 
> 
> But this requires activation via a web connection.

It does? "off-line activation is available if your machine does not have TCP
port 80 (http) access to wingware.com."  What part still requires web
access?

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From nepbabucxspamfree at yahoo.ca  Tue Aug 21 07:00:19 2007
From: nepbabucxspamfree at yahoo.ca (Bikal KC)
Date: Tue, 21 Aug 2007 20:30:19 +0930
Subject: C# and Python
In-Reply-To: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
References: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
Message-ID: <46cac5ba$1_1@news.chariot.net.au>

subeen wrote:

> When the user clicks Quick Sort button, the quicksort.py will be
> called and it will sort the numbers.

One way to do this:
In your C# app, have the mouse click event handler call python
interpreter "/path/to/python /path/to/quicksort.py". Make quicksort.py
write to a file the result. After the quicksort.py finishes, read the
file from your normal C# app.

Cheers.


From cjankowski at hbr-inc.com  Mon Aug  6 15:15:12 2007
From: cjankowski at hbr-inc.com (cjankowski at hbr-inc.com)
Date: Mon, 06 Aug 2007 12:15:12 -0700
Subject: RTF 2 Tiff
Message-ID: <1186427712.284976.207560@d30g2000prg.googlegroups.com>

Hi all,
I am trying to convert an RTF file to a Tiff image using Python.  This
process will convert several hundred images daily.  Currently I am
able to get the RTF file into a text format using Rtf2Txt.py, but I
loose the images contained in the RTF file.  I have the same problem
when I convert to .HTML using Rtf2Html.py.  I do not have a sample
that I can share because of HIPPA regulations.  Can anyone please help
me?

Thanks,

Chris J.



From jocago at gmail.com  Wed Aug  8 13:28:57 2007
From: jocago at gmail.com (jocago at gmail.com)
Date: Wed, 08 Aug 2007 10:28:57 -0700
Subject: Launch file from Python
Message-ID: <1186594137.971393.128780@57g2000hsv.googlegroups.com>

Good afternoon from someone who is trying to learn Python.

I would like to launch an app from within a Python script. From the
examples I have found, I should be able to do this with os.system.

I use this:
os.system("xplanet-1.2.0/xplanet.exe -fontsize 24 -label -target earth
-lat 33.65 -lon -84.42 -radius 40 -num_times 1 -tmpdir .")
This is copied directly from the .bat file that launches the xplanet
app. It works there.

and get this:
1

Can someone fill me in?  Thanks.



From paddy3118 at googlemail.com  Sun Aug  5 10:10:17 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sun, 05 Aug 2007 14:10:17 -0000
Subject: (no) fast boolean evaluation ?
In-Reply-To: <1186245190.970687.307920@k79g2000hse.googlegroups.com>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<1186240708.874804.271030@b79g2000hse.googlegroups.com>
	<1186245190.970687.307920@k79g2000hse.googlegroups.com>
Message-ID: <1186323017.756294.77350@k79g2000hse.googlegroups.com>

On Aug 4, 5:33 pm, Paddy <paddy3... at googlemail.com> wrote:
> On Aug 4, 4:18 pm, Paddy <paddy3... at googlemail.com> wrote:
>
>
>
> > On Aug 2, 10:47 pm, Stef Mientki <S.Mientki-nos... at mailbox.kun.nl>
> > wrote:
>
> > > hello,
>
> > > I discovered that boolean evaluation in Python is done "fast"
> > > (as soon as the condition is ok, the rest of the expression is ignored).
>
> > > Is this standard behavior or is there a compiler switch to turn it on/off ?
>
> > > thanks,
> > > Stef Mientki
>
> > The following program shows a(clumsy)? way to defeat the short-
> > circuiting:
>
> > def f(x):
> >   print "f(%s)=%s" % ('x',x),
> >   return x
> > def g(x):
> >   print "g(%s)=%s" % ('x',x),
> >   return x
>
> > print "\nShort circuit"
> > for i in (True, False):
> >   for j in (True, False):
> >     print i,j,":", f(i) and g(j)
>
> > print "\nShort circuit defeated"
> > for i in (True, False):
> >   for j in (True, False):
> >     print i,j,":", g(j) if f(i) else (g(j) and False)
>
> > The output is:
>
> > Short circuit
> > True True : f(x)=True g(x)=True True
> > True False : f(x)=True g(x)=False False
> > False True : f(x)=False False
> > False False : f(x)=False False
>
> > Short circuit defeated
> > True True : f(x)=True g(x)=True True
> > True False : f(x)=True g(x)=False False
> > False True : f(x)=False g(x)=True False
> > False False : f(x)=False g(x)=False False
>
> > - Paddy.
>
> And here are the bits for boolean OR:
>
> print "\n\nShort circuit: OR"
> for i in (True, False):
>   for j in (True, False):
>     print i,j,":", f(i) or g(j)
>
> print "\nShort circuit defeated: OR"
> for i in (True, False):
>   for j in (True, False):
>     print i,j,":", (g(j) or True) if f(i) else g(j)
>
> - Paddy.

Dumb!
 Use & and |
Gosh That port last night was good ;-)



From mugi at pinesalad.net  Tue Aug 21 00:06:43 2007
From: mugi at pinesalad.net (Signal)
Date: Mon, 20 Aug 2007 21:06:43 -0700
Subject: File Read Cache - How to purge?
Message-ID: <1187669203.698637.81990@i38g2000prf.googlegroups.com>

To become part of a larger script that will read through all files on
a given drive, I was playing around with reading files and wanted to
see if there was an optimum value for a read size on my system.

What I noticed is that the file being read is "cached" on subsequent
reads.
Based on some testing it looks like it's by the underlying OS (windows
in this case) but have a few questions.

Here's a code sample:
-------------------------------------------------------------------------
import os, time

# Set the following two variables to
# different large files on your system.
# Suggest files in the range of 500MB to 1Gig
testfile1 = "d:\\test1\\junk1.file"
testfile2 = "d:\\test1\\junk2.file"

def readfile(filename):
     size = os.path.getsize(filename)
     bufsize = 4096
     print filename, size, "Bytes"

     while bufsize < 132000:
         start = time.clock()

         f = open(filename, "rb")
         buf = f.read(bufsize)
         while buf:
             buf = f.read(bufsize)
         f.flush()     # note: put here as a test and
                        # it doesn't make a difference
         f.close()

         end = time.clock()
         print bufsize, round(end - start,3)
         bufsize = bufsize*2

      print " "

# Comment the second and third readfile and run
# the program twice to see a similar result for testfile1
readfile(testfile1)
readfile(testfile1)
readfile(testfile2)
-----------------------------------------------------------------


Sample output for first testfile1:
d:\test1\junk1.file 759167228 Bytes
4096 20.366
8192 0.923
16384 0.783
32768 0.737
65536 0.74
131072 0.82

After the first read test at 4096, subsequent read tests seem to be
cached.
This is even though the file is being closed before initiating another
read test.

Sample output for second testfile1
d:\test1\junk1.file 759167228 Bytes
4096 1.258
8192 0.944
16384 0.795
32768 0.743
65536 0.725
131072 0.826

Ok, didn't expect much difference here based on the first read, but
wanted to note how 4096 is now 1.2 seconds.

Sample output for testfile2:
d:\test1\junk2.file 1142511616 Bytes
4096 31.514
8192 1.417
16384 1.202
32768 1.11
65536 1.089
131072 1.245

Same situation as our first sample for testfile1. 4096 is not cached,
but subsequent reads are.

Now some things to note:

So it seems the file is being cached, however on my system only ~2MB
of additional memory is used when the program is run. This 2MB of
memory is released when the script exits.

If you comment the second and third readfile lines (as noted in the
code):

a. Run the program twice, you will see that even if the program exits,
this cache is not cleared.

b. If you open another command prompt and run the code, it's cached.

c. If you close both command prompts, open a new one and run the code
it's still cached.

It isn't "cleared" until another large file is read.

My questions are:

1. I don't quite understand how after one full read of a file, another
full read of the same file is "cached" so significantly while
consuming so little memory. What exactly is being cached to improve
the reading of the file a second time?

2. Is there anyway to somehow to take advantage of this "caching" by
initializing it without reading through the entire file first?

3. If the answer to #2 is No, then is there a way to purge this
"cache" in order to get a more accurate result in my routine?  That is
without having to read another large file first?



From bronger at physik.rwth-aachen.de  Sat Aug 25 06:24:16 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sat, 25 Aug 2007 12:24:16 +0200
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<mailman.285.1187992595.32294.python-list@python.org>
	<87tzqotwkk.fsf@wilson.homeunix.com>
	<faoso8$oa$1@gemini.csx.cam.ac.uk>
Message-ID: <877injud2n.fsf@wilson.homeunix.com>

Hall?chen!

Jeremy Sanders writes:

> Torsten Bronger wrote:
>
>> I don't know exactly what you mean but the answer is probably no.
>> For example, I want the author to state the title, keywords, etc
>> of his document, however, he should not state that he wants the
>> title printed centred and 4cm from the top of the page.
>> 
>> The latter is defined in the "theme" which will be given as a set
>> of ordinary LaTeX commands (for the LaTeX backend).
>
> Isn't the problem that making such a theme will be very hard?

Well, it will be a lot of work because there are so many elements
but there is no high complexity.  There will be a standard LaTeX
backend, and further backends can be built of top of that so that
for some of them, only very little extra code is necessary.

> One of the annoying things about LaTeX is lack of control over
> positioning (e.g. floats, page breaks...). The one thing most
> LaTeX users moan about is trying to get their document to fit into
> an n page limit (e.g. for a proposal).

Well, trying to meet a page limit is a more exotic requirement in my
opinion.  Anyway, apart from the theme and some parameters that you
can pass to it, there will be a LaTeX cfg file which, if present in
the document directory, will be inserted directly before
"\begin{document}".  This is a quick and simple way for LaTeX
wizards to configure the LaTeX process.  In this file, you can set a
smaller lineskip and a tighter font, for example.

> Maybe the theme could have some options to control spacing,
> however, like some sort of CSS.

At least *I* won't include a CSS parser, escpecially not for the
document source file.  My aim is to keep the list of parameters for
the backend a one-liner for most documents.  Themes may recognize
arbitrary many parameters but the standard themes will know only a
few (paper size, margins, font/fontsize, columns, one/twoside, and a
few more).

Of course, a third-party theme may use CSS for LaTeX, possibly the
very same CSS file which is used for the accompanying HTML backend.

> I think the one thing that would improve LaTeX is orthogonality in
> its commands (e.g. why no 8pt option for the document, why the
> crazy \small, \LARGE, etc commands?),

(There is the extsizes package.)  I understand "orthogonality" as
the independence of features, and by and large this is true for
LaTeX.  \small is not for *global* font changes after all.  You may
miss completeness, well, Gummi will surely offer even less, which I
think is one of its chances.  I certainly miss homogeneity in LaTeX
(for example, 10-12pt is in the standard classes, 8-20pt is in
extsizes), and in this respect, Gummi will offer much more.

> and fixing the font system to be based around modern
> fonts. Finally making bibtex part of the core and making it easy
> to use would be great.

This is another opportunity: You can hide the toolchain (well, this
is done by LaTeX editors, too) and implementation uglinesses from
the author.  By the way, Gummi will use the new biblatex package for
the bibliography.  It's really a relief to abandon the notorious
BibTeX style language for good.

Some people asked me whether it wouldn't be better to improve LaTeX
instead, however, this would make possible only a small fraction of
these goals.  BibTeX is a good example: Its syntax is utter crap,
and even with biblatex you have to learn how to use the outdated
7bit (sometimes 8bit) format of bib files.  The whole LaTeX system
is immutably optimised for English letters.  Aleph will ease this
somewhat sometime.  In Gummi, the only thing left of all this is
that "en" is the default document language.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From grahn+nntp at snipabacken.dyndns.org  Sun Aug 12 14:03:11 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 12 Aug 2007 18:03:11 GMT
Subject: Public Telnet Server?
References: <1186844845.304731.18300@x40g2000prg.googlegroups.com>
Message-ID: <slrnfbuirp.52s.grahn+nntp@frailea.sa.invalid>

On Sat, 11 Aug 2007 15:07:25 -0000, Dave <davmillar at gmail.com> wrote:
> Hi there. I'm a beginner at Python and I'm writing my first Python
> script. It's a text adventure about coffee and mixing drinks and being
> crazy and such. I keep updating it and want my friends to beta test it
> for me, but some of them don't have the right version of Python or
> don't want to get Python at all. Is there an easy way I can set up a
> public telnet server so they can just telnet the server and play it?

- get yourself a Unix machine with a real, routable IP address
- enable telnet (or better, ssh) access
- create a new user
- make the game this user's login shell, or let her login script
  exec the game
- test it out
- distribute address, user name and password to people

"netcat ... -e the_game" may be another option.

However, the security implications of this may be serious. You should
assume these people can get local user shell access whenever they feel
like it, and use your machine for evil purposes. I trust my brother
with local access to my machines, and noone else[1].

/J?rgen

[1] Well, his two cats too, but they have never logged in so far.
    Probably forgot the password, too.

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From miki.tebeka at gmail.com  Tue Aug 14 14:44:08 2007
From: miki.tebeka at gmail.com (Miki)
Date: Tue, 14 Aug 2007 18:44:08 -0000
Subject: Fast kNN from python
In-Reply-To: <1187086584.076990.260680@r34g2000hsd.googlegroups.com>
References: <1187086584.076990.260680@r34g2000hsd.googlegroups.com>
Message-ID: <1187117048.992003.103700@x35g2000prf.googlegroups.com>

Hello,

> I am looking for a Python implementation or bindings to a library that
> can quickly find k-Nearest Neighbors given an arbitrary distance
> metric between objects. Specifically, I have an "edit distance"
> between objects that is written in Python.
First Google search for "k-Nearest Neighbors python", yielded
http://people.revoledu.com/kardi/tutorial/KNN/resources.html  which
pointed to http://biopython.org/DIST/docs/api/public/Bio.kNN-module.html

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



From grante at visi.com  Tue Aug 28 08:19:28 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 28 Aug 2007 12:19:28 -0000
Subject: Chaining programs with pipe
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
	<13cnbi87neru8c3@corp.supernews.com>
	<mailman.97.1187757319.32294.python-list@python.org>
	<13cogr3n6no937b@corp.supernews.com>
	<1187795716.083417.299540@q4g2000prc.googlegroups.com>
	<fau28j$gle$3@lust.ihug.co.nz>
	<mailman.51.1188274035.28954.python-list@python.org>
	<fb0alf$hgr$3@lust.ihug.co.nz>
	<1188290735.746264.280650@y42g2000hsy.googlegroups.com>
Message-ID: <13d84mghdg7990f@corp.supernews.com>

On 2007-08-28, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:

> On Windows, windowed applications (as opposed to console
> applications) start with no stdin/stdout/stderr by default.
> The application developer can modify that if desired, of
> course - I've menctioned some ways to do that. This fact
> simply means that those OS's *are* different - most of the
> time one can ignore the differences, but not always. Neither
> of them is doing the absolute "Right Thing".

We're never going have any good flames with that sort of
attitude.  ;)

-- 
Grant Edwards                   grante             Yow! I know how to do
                                  at               SPECIAL EFFECTS!!
                               visi.com            


From Shawn at Milochik.com  Tue Aug 14 14:44:17 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Tue, 14 Aug 2007 14:44:17 -0400
Subject: curses library
In-Reply-To: <20070814211043.286b8aa6.ghirai@ghirai.com>
References: <20070814211043.286b8aa6.ghirai@ghirai.com>
Message-ID: <2dc0c81b0708141144n40c3209bgce3cf51f966c7fc7@mail.gmail.com>

You should try Google -- you'll get results faster:

http://www.amk.ca/python/howto/curses/

http://docs.python.org/lib/module-curses.html





On 8/14/07, Ghirai <ghirai at ghirai.com> wrote:
> Hello list,
>
> I need to write a console application.
>
> Are there any wrappers around curses/ncurses?
> Or any other similar libraries?
>
> Thanks.
> --
> Regards,
> Ghirai.
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Please read:
http://milocast.com/2007/07/31/this-i-believe/


From buzzard at urubu.freeserve.co.uk  Sun Aug 19 19:58:52 2007
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Mon, 20 Aug 2007 00:58:52 +0100
Subject: Syntax Question - list multiplication
In-Reply-To: <4L3yi.61391$W21.1628190@phobos.telenet-ops.be>
References: <1187560273.146491.90530@r29g2000hsg.googlegroups.com>
	<4L3yi.61391$W21.1628190@phobos.telenet-ops.be>
Message-ID: <faalcb$30v1$1@energise.enta.net>

Roel Schroeven wrote:
> Pablo Torres schreef:
> 
>> Hi guys!
>>
>> I am working on Conway's Game of Life right now and I've run into a
>> little problem.
>> I represent dead cells with 0s and live ones with 1s. Check this out:
>>
>>     >>> grid = [[0] * 3] * 3
>>     >>> grid
>>     [[0, 0, 0], [0, 0, 0], [0, 0, 0]]
>>     >>> grid[0][0] = 1
>>     [[1, 0, 0], [1, 0, 0], [1, 0, 0]]
>>
>> Now, that's not what I want. I just want the first element of the
>> first sublist to be a 1, not the first of every one. Here's what I
>> tried and didn't work:
>>
>> 0.  grid = [[0] * 3][:] * 3    then the same grid[0][0] = 1 statement
>> 1.  grid = [[0][:] * 3] * 3    followed by the same assignment
>> 2.  (grid[0])[0] = 1    with the original initialization of the grid
>>
>> So, that means that it isn't a problem with two different variables
>> refering to the same list (0. and 1. prove that). What I don't
>> understand is why 2. doesn't work either. I'm baby-feeding my
>> instructions to Python and the mistake is still there. Any ideas?
>>
>> Hope you can help. Thanks in advance,
> 
> 
> The multiplication operator doesn't make new copies; all elements
> reference the same object, as you can see with id():
> 
>>>> lst = [0] * 3
>>>> lst
> [0, 0, 0]
>>>> id(lst[0]), id(lst[1]), id(lst[2])
> (9788716, 9788716, 9788716)
> 

I think you probably meant something like,

>>> lst = [[0] * 3] * 3
>>> lst
[[0, 0, 0], [0, 0, 0], [0, 0, 0]]
>>> id(lst[0]), id(lst[1]), id(lst[2])
(15937704, 15937704, 15937704)
>>>

i.e. a list of mutable types where the difference between multiple
objects and multiple references to the same object will be apparent.
With small integers you're likely to find you have multiple references
to the same integer objects however the list is constructed.

Duncan


From see_website at mindprod.com.invalid  Mon Aug 20 07:13:46 2007
From: see_website at mindprod.com.invalid (Roedy Green)
Date: Mon, 20 Aug 2007 11:13:46 GMT
Subject: best GUI library for vector drawing program
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
Message-ID: <sptic31137mal5t4cajdo6lvddo8spjkbp@4ax.com>

>What would be the best cross-platform GUI library to use for a vector
>based CAD program ( something like Visio on Windows ) 
I don't know about he best, but I have collected a list of them at
http://mindprod.com/jgloss/graph.html
-- 
Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com


From pangj at juno.com  Thu Aug 23 04:19:32 2007
From: pangj at juno.com (Jeff Pang)
Date: Thu, 23 Aug 2007 08:19:32 GMT
Subject: [ANN] Python courses this Fall
Message-ID: <20070823.011932.12838.0@webmail31.lax.untd.com>

Sounds good.How about the costs for those lessons?thanks.

-- "wesley chun" <wescpy at gmail.com> wrote:
Folks, I'd like to announce my final Python courses for 2007:

Need to get up-to-speed with Python as quickly as possible? Come join
me, Wesley Chun, author of Prentice-Hall's well-received "Core Python
Programming," for another set of courses this Fall in beautiful
Northern California! This will be the final set for 2007... if you
miss these, you'll have to wait until next year. I look forward to
meeting you!
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(COMPREHENSIVE) INTRODUCTION TO PYTHON: Mon-Wed, 2007 Oct 8-10

This is course is meant for those new to Python and/or want to get
more in-depth formal training. We will immerse you in the world of
Python in only a few days.  We will show you more than just its syntax
(which you don't really need a book to learn, right?). Knowing more
about how Python works under the covers, including the relationship
between data objects and memory management, will make you a much more
effective Python programmer coming out of the gate.  3 hands-on labs
each day will help hammer the concepts home.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
INTERNET PROGRAMMING WITH PYTHON: Sat, 2007 Oct 13

This 1-day course will introduce current Python programmers to 3
distinct areas of Internet programming, each in self-contained modules
with a set of lab exercises following each lecture topic:

Network Programming using Sockets -- Underneath all of today's network
protocols, i.e., HTTP, FTP, RDBMS, IM, e-mail, etc., lies the main
communication mechanism, sockets. Here, we introduce client/server
architecture and how to program sockets using Python.

Internet Client Programming -- One level above the socket layer are
well-known Internet protocols such as FTP, NNTP, POP3, and SMTP.  In
this section, we learn how to create Internet clients of these
protocols to transfer files, send and receive e-mail, and read Usenet
newsgroup postings.

Web/CGI Programming -- Yes, pure CGI is "sooo yesterday," but before
you jump on all the web framework bandwagons, it's a good idea to
learn basics and the basis of how all web servers deliver dynamic
content back to the client browser so that you can appreciate all the
work that is done on your behalf by a more fully-featured frame- work.
Time-permitting, we will also give a high-level overview of one of the
more popular Python web frameworks, Django.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

WHERE: near the San Francisco Airport (SFO/San Bruno), CA, USA

WEB:   http://cyberwebconsulting.com (click "Python Training")

LOCALS: easy freeway (101/280/380) with lots of parking plus public
transit (BART and CalTrain) access via the San Bruno stations, easily
accessible from all parts of the Bay Area

VISITORS: free shuttle to/from the airport, free high-speed internet,
free breakfast and regular evening receptions; fully-equipped suites

See website for costs, venue info, and registration.  Discounts are
available for multiple registrations as well as for teachers/students.

Hope to see you there!
-- wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com
-- 
http://mail.python.org/mailman/listinfo/python-list



________________________________________________________________________
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From python at jayloden.com  Mon Aug 20 16:24:42 2007
From: python at jayloden.com (Jay Loden)
Date: Mon, 20 Aug 2007 16:24:42 -0400
Subject: reading a line in file
In-Reply-To: <2dc0c81b0708201314q727ca3a1s12bef74a25b20abc@mail.gmail.com>
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>	<2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com>	<93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx>	<2dc0c81b0708201207p7f83f2e0l6de15fd70be252a5@mail.gmail.com>	<93066C069973ED448DC2BCEA9C44A7383BE2B6@efmailx>	<46C9F561.50405@jayloden.com>
	<2dc0c81b0708201314q727ca3a1s12bef74a25b20abc@mail.gmail.com>
Message-ID: <46C9F88A.9090400@jayloden.com>

Shawn Milochik wrote:
> Everybody hates regexes. Except me. Discrimination!

Actually, I love them, they are an amazingly powerful tool. I just happen to also believe the old axiom "when all you have is a hammer, everything looks like your thumb". Also the related "some people think when they see a problem 'I know, I'll solve it with regexes' - now they have two problems" ;)

I work with a lot of Perl at work and the mindset with Perl is precisely the opposite, since the regexes in Perl are so fast and so built-in/easy to work with. I guess it's sort of a language design and culture thing.

-Jay


From franz.steinhaeusler at gmx.at  Sun Aug  5 11:03:01 2007
From: franz.steinhaeusler at gmx.at (Franz Steinhäusler)
Date: Sun, 05 Aug 2007 17:03:01 +0200
Subject: Best programs written completly in Python
References: <mailman.1647.1186320975.22759.python-list@python.org>
Message-ID: <qjpbb39h0rsgrp7mnqpecdqi7apf2uhq78@4ax.com>

On Sun, 05 Aug 2007 15:35:53 +0200, David Boddie <david at boddie.org.uk>
wrote:

>On Sun Aug 5 14:44:55 CEST 2007, Franz Steinh?usler wrote:
>
>> I'm only interested to have a list, or even help to 
>> extend an existing one.
>
>If the main criterion is that the programs are written in Python then
>surely the PythonInfo Wiki is the place for such a list:
>
>  http://wiki.python.org/moin/Applications
>
>May I suggest that you extend this one?
>
>David

David, thank you very much, perfect! :)
-- 
Franz Steinhaeusler


From bignose+hates-spam at benfinney.id.au  Wed Aug  8 17:47:13 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 09 Aug 2007 07:47:13 +1000
Subject: How to avoid reverse code engineering of a python executable
References: <1186573228.419760.272240@k79g2000hse.googlegroups.com>
Message-ID: <87vebp66n2.fsf@benfinney.id.au>

NicolasG <nicolasg at gmail.com> writes:

> Now I want to proceed a little bit further asking how can I avoid
> (or at least make it difficult) for some one to extract my code by
> using reverse code engineer techniques?  I came on pyobfuscate but I
> would like more suggestions and guide to achieve the most possible
> security in this matter.

The best possible security is to examine and change the threat model.

Why are you treating the code recipient as the bad guy? In other
words, why do you care whether the recipient reverse engineers the
program? Whatever effort you put into obfuscation, you can't prevent
even a mildly interested attacker from reverse engineering a program
they have in their posession.

-- 
 \           "Laugh and the world laughs with you; snore and you sleep |
  `\                                             alone."  -- Anonymous |
_o__)                                                                  |
Ben Finney


From mail at microcorp.co.za  Wed Aug 22 03:25:01 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 22 Aug 2007 09:25:01 +0200
Subject: Submit Your Python Scripts
References: <1187718492.549619.164440@w3g2000hsg.googlegroups.com>
	<fafrkd$5n3$2@sea.gmane.org>
Message-ID: <01e001c7e48d$e05a89a0$03000080@hendrik>

"Steve Holden" <ste..nweb.com> wrote:


> Ooh, goody. I just *live* to expose my scripts. Not.

What? And miss out on all the wonderful special offers?

;-)  - Hendrik





From monty.python at fastmail.fm  Tue Aug 21 11:59:34 2007
From: monty.python at fastmail.fm (David N Montgomery)
Date: Tue, 21 Aug 2007 16:59:34 +0100
Subject: How to optimise this code?
Message-ID: <1187711974.29800.1206519007@webmail.messagingengine.com>

class testCase:
    def __init__(self, tc):
        if tc == 1:self.testCase1()
        if tc == 2:self.testCase2()
        if tc == 3:self.testCase3()
        if tc == 4:self.testCase4()
        if tc == 5:self.testCase5()
        if tc == 6:self.testCase6()

    def testCase1(self):
        print "tc1"

    def testCase2(self):
        print "tc2"

    def testCase3(self):
        print "tc3"

    def testCase4(self):
        print "tc4"

    def testCase5(self):
        print "tc5"

    def testCase6(self):
        print "tc6"


    def testCaseX(self):
        print "tcX"

totalNumberOfTestCases = 6
x = 0
while x <= totalNumberOfTestCases:
    x += 1
    testCase(x)


This template code is working, but I envisage having 100+ test cases and
am concerned about my useage of if statements. I would be grateful for
any pointers as to how I can run all tests cases, regardless of how
many, in a more efficient manner.

Thank you in advance.


From joesox at gmail.com  Mon Aug 20 09:53:52 2007
From: joesox at gmail.com (JoeSox)
Date: Mon, 20 Aug 2007 06:53:52 -0700
Subject: How do I call anonymous classes from imported modules?
In-Reply-To: <8I8yi.6116$924.1335@newssvr23.news.prodigy.net>
References: <mailman.2179.1187578824.22759.python-list@python.org>
	<fab13k$9tn$1@zinnia.noc.ucla.edu>
	<mailman.2182.1187582709.22759.python-list@python.org>
	<8I8yi.6116$924.1335@newssvr23.news.prodigy.net>
Message-ID: <785694cd0708200653n79ef4fcfo1f2c02a59763956f@mail.gmail.com>

On 8/19/07, James Stroud <jstroud at mbi.ucla.edu> wrote:
> This was the poor design I was hinting to. do_foobar is type-checking
> for ticker. "Casting" as you might think of it does not exist in python.
> Creating new objects based on the values of existing objects (lets call
> it "conversion" for lack of a better name) does (e.g. int(2.0)). But
> this is not casting. Unless you have the power to re-author all of the
> do_foobar()s to not type-check, you should create an instance of ticker
> and pass that:
>
> t = ticker(param1, param2, parametc)
> [...]
>               anobj.do_foobar(t)
>
> The "got nothing instead" means that you should have passed an
> argument--and unfortunately whoever authored do_foobar() type-checked
> for a ticker, which is not a desirable way to design an API.

I designed the system using this 'tutorial'
http://lucumr.pocoo.org/blogarchive/python-plugin-system

With your help and revisiting the article I figured out that this call works:
>>> for plugin in get_plugins_by_capability('do_foobar'):
	plg=plugin()
	print plg.do_foobar()

--
Thanks, Joe


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 31 05:07:17 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 31 Aug 2007 11:07:17 +0200
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188523096.427717.87380@x35g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<1188430887.481586.106760@l22g2000prc.googlegroups.com>
	<mailman.159.1188499976.28954.python-list@python.org>
	<1188504811.019632.186580@x35g2000prf.googlegroups.com>
	<46d75116$0$401$426a74cc@news.free.fr>
	<1188517050.174081.265900@x40g2000prg.googlegroups.com>
	<46d75d33$0$6231$426a34cc@news.free.fr>
	<1188520454.996940.293030@m37g2000prh.googlegroups.com>
	<46d76790$0$410$426a74cc@news.free.fr>
	<1188523096.427717.87380@x35g2000prf.googlegroups.com>
Message-ID: <46d7da35$0$6451$426a74cc@news.free.fr>

Russ a ?crit :
>> Pre and post conditions applying to the class ? Now that's an
>> interesting concept. IIRC, Eiffels pre and post conditions only apply to
>> methods, and I fail to see how they could apply to a class. But since
>> you're an expert on the subject, I don't doubt you'll enlighten us ?
> 
> I made a simple mistake. Excuse me. Oh wait ... aren't you one of the
> sensitivity police who
> laid into me for criticizing someone else. 

Nope, I'm one of the regular citizens here that tried to make you 
realize you were acting as an arrogant clueless newbie.

> For the record, the guy I
> criticized
> made ridiculous assertions about DBC.

For the record, the guy you treaded as he was a retarted knows much more 
than you about both Python and DbC. Thinking that someone is "ignorant" 
or "ridiculous" because he does not happen to share your opinions on 
some subject is certainly not what's I'd call an intelligent, civilized, 
  respectful attitude.

>  All I did was to make a simple
> mistake about
> an inconsequential matter.

All you did was persisting on being arrogant while showing your lack of 
knowledge on both Python and DbC.

> No, pre and post conditions obviously don't
> apply to classes,
> but all I said was that that's how it appeared to me "at first
> glance."
> 
> If you are upset about my criticism of one of your colleagues, please
> tell him to quite making
> outrageous assertions about something he obviously knows little about.
> 

I'm not upset. I'm actually trying to help you realizing the dumbness of 
your attitude. But I'm afraid this is going to be a lost cause...


From mcl.office at googlemail.com  Wed Aug 29 14:58:59 2007
From: mcl.office at googlemail.com (mcl)
Date: Wed, 29 Aug 2007 11:58:59 -0700
Subject: Unzip: Memory Error
Message-ID: <1188413939.834662.193180@y42g2000hsy.googlegroups.com>

I am trying to unzip an 18mb zip containing just a single 200mb file
and I get a Memory Error.  When I run the code on a smaller file 1mb
zip, 11mb file, it works fine.

I am running on a hosted Apache web server

I am using some code I found on the web somewhere.


def unzip_file_into_dir(file, dir):
	#os.mkdir(dir, 0777)
	zfobj = zipfile.ZipFile(file)
	for name in zfobj.namelist():
		if name.endswith('/'):
			os.mkdir(os.path.join(dir, name))
		else:
			outfile = open(os.path.join(dir, name), 'wb')
			outfile.write(zfobj.read(name))
			outfile.close()


Error Traceback: Line 357 gives the Memory Error
I have removed paths from file references
==============================================

MemoryError	Python 2.3.4: /usr/bin/python
Wed Aug 29 19:38:22 2007

A problem occurred in a Python script. Here is the sequence of
function calls leading up to the error, in the order they occurred.

/qlunzip.py
   58
   59
   60 if __name__ == "__main__" :
   61                 unzipMain()
   62
unzipMain = <function unzipMain>

/qlunzip.py in unzipMain()
   53                 destdir = getDestDir()
   54                 print destdir, gv.nl
   55                 unzip_file_into_dir(zips, destdir)
   56
   57
global unzip_file_into_dir = <function unzip_file_into_dir>, zips = '/
pcodes.zip', destdir = '/pcodes/'

/qlunzip.py in unzip_file_into_dir(file='pcodes.zip', dir='pcodes/')
   34                 else:
   35                         outfile = open(os.path.join(dir, name),
'wb')
   36                         outfile.write(zfobj.read(name))
   37                         outfile.close()
   38
outfile = <open file 'pcodes/pcodes.lst', mode 'wb'>, outfile.write =
<built-in method write of file object>, zfobj = <zipfile.ZipFile
instance>, zfobj.read = <bound method ZipFile.read of <zipfile.ZipFile
instance>>, name = 'pcodes.lst'

 /usr/lib/python2.3/zipfile.py in read(self=<zipfile.ZipFile
instance>, name='pcodes.lst')
  355             # zlib compress/decompress code by Jeremy Hylton of
CNRI
  356             dc = zlib.decompressobj(-15)
  357             bytes = dc.decompress(bytes)
  358             # need to feed in unused pad byte so that zlib won't
choke
  359             ex = dc.decompress('Z') + dc.flush()
bytes = '\xc4\x9d]\x93\xab8\x92\x86\xef7b\xff\x83\xa3/\xf6f\xba
\xa7\xe7\xa2g#vwf6\x8a\x02\xc3\xd04\x8d\r\x1e\x7f\xdclP\xb6\xcav\x1c
\xca\xd4`\xfbx...; \xb7jp\x06V{\xaf\xc3\xa5\xa7;\xdd\xd2\xaaD\x7f)c
\xc6\x9d\x0f\xf2\xff-\xc9\x92\xc3\x1d\xa4`\xe0\xb8\x06)\x188\x9cA\n
\x06\x8e\x1bPc\xf8\xf0\x1f', dc = <zlib.Decompress object>,
dc.decompress = <built-in method decompress of zlib.Decompress object>

MemoryError:
      args = ()
============================================================

Any help much appreciated

Richard



From afriere at yahoo.co.uk  Tue Aug 21 03:41:59 2007
From: afriere at yahoo.co.uk (Asun Friere)
Date: Tue, 21 Aug 2007 00:41:59 -0700
Subject: Newbee Question
In-Reply-To: <mailman.15.1187620149.26576.python-list@python.org>
References: <mailman.15.1187620149.26576.python-list@python.org>
Message-ID: <1187682119.353756.278840@i13g2000prf.googlegroups.com>

Oh well since a few solutions have already been posted I thought I
might add another, just so you at the very least you have to do some
work making up your mind which one to choose.  Using an incremental
approach just to be different ...

from decimal import Decimal

normal = Decimal('0.04')
over = Decimal('1.40)

def calcStopPay (stops) :
    pay = Decimal('0.00')
    while stops :
        incr = normal if stops < 23 else over
        pay += incr
        stops -= 1
    return pay

#testing:
for x in range(50) :
    print "Stop pay for %s stops: $%s" % (x, calcStopPay(x))



From fperez.net at gmail.com  Thu Aug  2 18:23:07 2007
From: fperez.net at gmail.com (Fernando Perez)
Date: Thu, 02 Aug 2007 16:23:07 -0600
Subject: Bug in execfile?
References: <f8t80e$gvh$1@sea.gmane.org> <f8tgfq$e2u$1@sea.gmane.org>
Message-ID: <f8tlgc$tld$1@sea.gmane.org>

Ian Clark wrote:

> Fernando Perez wrote:
>> Hi all,
>> 
>> (snip)
>> 
>> I'm really, really puzzled by this.  From reading the execfile() docs, I had
>> the hunch to change the call to:
>> 
>>     execfile(fname,{})
>> 
>> and now the problem disappears, so I can keep on working.
>> 
>> But I'm still very bothered by the fact that changing that first call 'if 0'
>> to 'if 1' has any effect on the later call to runscript().  That really
>> doesn't feel right to me...

[...]

> By default execfile works on the *current* namespace. So exec'ing a
> script that modified it's global namespace will also modify the global
> namespace of the calling module (see my first example). If you specify a
> dictionary then execfile will use that as the global and local (maybe)
> namespace of the file that it is running (hence the global namespace of
> the calling module stays in tact per the second example). That is why
> execfile(fname, {}) works for you, it doesn't pollute your current
> namespace. It uses a different namespace when calling the file then is
> being used by the calling module.

Right, it makes complete sense that the first execfile() call puts the symbols
in the global namespace, and that's why the failure disappears when calling
the runscript wrapper.  I just didn't think carefully enough, thanks.

> No idea why your function failed though. *shrug*

Yes, that still bothers me.  That a simple

def runscript(f): execfile(f)

won't work just like execfile would is, at the least, a bit puzzling to me.

Cheers,

f



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 10 06:10:53 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 10 Aug 2007 12:10:53 +0200
Subject: programmatically define a new variable on the fly
In-Reply-To: <1186697500.024593.303820@x35g2000prf.googlegroups.com>
References: <1186697500.024593.303820@x35g2000prf.googlegroups.com>
Message-ID: <46bc39a0$0$400$426a74cc@news.free.fr>

Lee Sander a ?crit :
> Hi,
> 
> I would like to define a new variable which is not predefined by me.
> For example,
> I want to create an array called "X%s" where "%s" is to be determined
> based on the data I am processing. So, for example, if I the file
> I'm reading has
> g 99
> on the first line, I want to create a new variable  called "Xg" whose
> length
> is 99.
> I tried eval("Xg=[0]*99") but that did not work.
> 
> any help would be greatly appreciated

As others already pointed out, the canonical solution is to use a dict, 
and it's almost always the best solution - a variant being to use an 
object (eventually a module object) and dynamically add attributes to it 
using setattr()[1].

Now, for the corner case where you *really* want to dynamically create 
new names in the module itself, the solution is to use exec. But I would 
definitively *not* recommand this solution unless you really know what 
you're doing and why you're doing it.

For the record, I did use this last solution twice in seven years. And 
it was mostly to avoid repeating boilerplate code in some low-level 
module of a framework. Definitively not a common case...


[1] which, FWIW, doesn't make much differences since attributes are 
stored in dicts....

> Lee
> 


From padraigkitterick at gmail.com  Thu Aug 23 12:48:46 2007
From: padraigkitterick at gmail.com (=?iso-8859-1?B?UOFkcmFpZw==?=)
Date: Thu, 23 Aug 2007 09:48:46 -0700
Subject: Python submodules and name imports
In-Reply-To: <mailman.175.1187878437.32294.python-list@python.org>
References: <mailman.175.1187878437.32294.python-list@python.org>
Message-ID: <1187887726.005976.71600@l22g2000prc.googlegroups.com>

On Aug 23, 2:58 pm, Frank Aune <Frank.A... at broadpark.no> wrote:
> Hi,
>
> First take a look at:
>
> http://www.network-theory.co.uk/docs/pytut/Packages.html
>
> as I will use this module file layout as an example.
>
> If I want to do the following:
>
> from Sound import Effects
> ...
> Effects.echo.echofilte(bla bla)
>
> What will Sound/Effects/__init__.py need to contain then? I tried to define
> the __all__ = ['echo','surround','reverse']  parameter in the init file, but
> this only seems to be effective for " .. import *" statements.
>
> Is the correct way of accomplishing this to explicitly import the submodules
> in sound/Effects/__init__.py? I'm looking for the "official" way of doing
> this.
>
> Thank you,
> Frank Aune

You can put 'import echo' into sound/Effects/__init__.py. This is a
widespread practice. You could also put 'from echo import *' into the
file, if you wanted to have a single namespace for all methods in
Effects.



From raims at dot.com  Wed Aug 15 14:40:17 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Wed, 15 Aug 2007 20:40:17 +0200
Subject: All names in the current module
References: <87d4xowymq.fsf@wilson.homeunix.com>
	<1i2whvw.1qje42i1bh18bkN%raims@dot.com>
	<46c33e5a$0$36450$4fafbaef@reader5.news.tin.it>
Message-ID: <1i2wmoi.vjjbh81fboc6kN%raims@dot.com>

Fabio Z Tessitore <fabioztessitore at libero.it> wrote:
> to get names' list you can simply call globals()

Not strictly true. globals() returns the current's scope global vars. If
you import a module in the current scope globals() won't display the
names inside it.

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From half.italian at gmail.com  Mon Aug 27 18:25:25 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: Mon, 27 Aug 2007 15:25:25 -0700
Subject: Socket - gaierror
In-Reply-To: <1188244050.029920.314700@i13g2000prf.googlegroups.com>
References: <1188242671.182072.130150@r23g2000prd.googlegroups.com>
	<OIidnbjzCJVLu07bnZ2dnUVZ_gidnZ2d@comcast.com>
	<1188244050.029920.314700@i13g2000prf.googlegroups.com>
Message-ID: <1188253525.718844.115500@q5g2000prf.googlegroups.com>

On Aug 27, 12:47 pm, half.ital... at gmail.com wrote:
> On Aug 27, 12:32 pm, Larry Bates <larry.ba... at websafe.com> wrote:
>
>
>
> > half.ital... at gmail.com wrote:
> > > Hi all,
>
> > > I'm having trouble with the socket module resolving a hostname.  It
> > > seems like this is a system level problem, but I'm not even sure where
> > > to start.  I can ping the smtp server by name and IP, but when
> > > smtp.SMTP("theHost") tries to get the hostname, it keeps giving me the
> > > following error:
>
> > >   File "bin/program.py", line 123, in notify
> > >     smtp = smtplib.SMTP("theHost")
>
> > >   File "/usr/lib/python2.4/smtplib.py", line 255, in __init__
> > >     addr = socket.gethostbyname(socket.gethostname())
>
> > > gaierror: (-2, 'Name or service not known')
>
> > > I tried changing to a different smtp server, using an ip instead of a
> > > host name.  I could ping both boxes by name oor IP.
>
> > > any ideas?
>
> > > ~Sean
>
> > The specific error shown is a DNS resolution problem.  Based on the
> > URL "theHost" smtplib can't resolve to an IP address (which is what
> > socket.gethostbyname does).  You don't say what happened when you changed to ip,
> > but I suspect it is a different error or some other problem.  Maybe a firewall
> > issue (port 25 not open?), but I'm just guessing.
>
> > -Larry
>
> Changing it to IP gives me the same exact error...
>
>   File "bin/prgram.py", line 123, in notify
>     smtp = smtplib.SMTP("XXX.XXX.XXX.XXX")
>
>   File "/usr/lib/python2.4/smtplib.py", line 255, in __init__
>     addr = socket.gethostbyname(socket.gethostname())
>
> gaierror: (-2, 'Name or service not known')
>
> Looks like the smtp port is closed on the client machine...doh Should
> have gotten to that!
>
> Thank you.
>
> ~Sean

I take it back, that wasn't the solution.  I got it to work by
haacking smtplib with a static host instead of the
socket.gethostbyname(socket.gethostname()) call...but if I leave that
in there I might get shot one day.  What could cause the shell to be
able to resolve the addresses properly, but not python?
nnsswitch.conf ?

I don't know enough about what's going on in the background.  Any
other ideas? Or should I try this on a unix board?

~Sean



From donn at _vvanta._om  Sun Aug 19 13:18:36 2007
From: donn at _vvanta._om (Donn Cave)
Date: Sun, 19 Aug 2007 17:18:36 -0000
Subject: imaplib & Received: header(s)???
References: <mailman.2160.1187512222.22759.python-list@python.org>
Message-ID: <13cgurcg663m003@corp.supernews.com>

Quoth Petri Savolainen <petri.savolainen at iki.fi>:

| Is there a way to get at the "Received" header(s) or is there something 
| in imaplib or imap server implementations that hides these? If not, what 
| IMAP FETCH command should be used? I've used for example 
| "BODY[HEADER.FIELDS (RECEIVED)]" and it always returns empty ("\r\n"). 
| Despite the Received - header existing, as demonstrated by taking a look 
| at message sources via desktop email clients.
|
| I need to get at the Received-for header to figure out at which address 
| we received an email. We subscribe to a number of mailing lists using 
| per-mailing-list addresses, and often, To: field contains something else 
| than our address, thus the need for Received-for.
|
| Any help would be much appreciated - this is baffling me and I've not 
| found anything recent that would help.

"Anything recent"?  If you're getting IMAP advice from comp.lang.python,
I think it's fair to say you will need to be more resourceful.  The
RFC for IMAP4rev1 should be helpful.  I don't know the IMAP to get a
single header field, but my guess is that your error is there.  Can you
retrieve other fields that way?  Does the one you're looking for appear
in the data if you get the whole header, for example with 'RFC822.HEADER'?
It certainly does in my Python IMAP client, and this would have at least
helped you refine your question.

	Donn Cave


From http  Thu Aug  2 16:56:23 2007
From: http (Paul Rubin)
Date: 02 Aug 2007 13:56:23 -0700
Subject: __call__ considered harmful or indispensable?
References: <mailman.1527.1186079415.22759.python-list@python.org>
	<7xfy31smuq.fsf@ruckus.brouhaha.com>
	<46b2428b$0$19638$426a74cc@news.free.fr>
Message-ID: <7x8x8tmz9k.fsf@ruckus.brouhaha.com>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
> from foo import foo
> x = foo(3)
> 
> Or did I miss the point ???

The foo module might define a bunch of additional functions that you
still want to be able to access in qualified form.  For example it
would somewhat clean up the interface to the python random module if
you could say

  import random
  x = random()   # get a random float between 0 and 1
  
while still having access to random.shuffle, random.choice, etc.


From cajnnjonaj at fjireanjtjprodjuctijons.com  Sat Aug 18 14:22:54 2007
From: cajnnjonaj at fjireanjtjprodjuctijons.com (Aaron)
Date: Sat, 18 Aug 2007 13:22:54 -0500
Subject: yet another indentation proposal
Message-ID: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>

Hello all.

I realize that proposals dealing with alternatives to indentation  have been 
brought up (and shot down) before, but I would like to take another stab at 
it, because it is rather important to me.

I am totally blind, and somewhat new to Python.  I put off learning Python 
for a long time, simply because of the indentation issue.  There is no easy 
way for a screenreader user, such as my self, to figure out how much a 
particular line of code is indented.  A sited person simply looks down the 
column to make sure that everything lines up.  I, on the other hand, 
generally find my self counting a lot of spaces.

Naturally, there are many other special circumstances in which depending on 
whitespace is impractical, but they have already been mentioned in previous 
threads on the topic, so I won't bother rehashing them.

Borrowing from another proposal, I would submit that the opening block and 
closing block markers could be _{ and }_ respectively.  If it seems that 
there is even a modicum of support, I'll write up a more complete proposal. 
But in short, an _{ will signify to the interpreter that one level of 
indentation is to be added to the current level, that all the statements 
that follow (until the closing _}) are to be understood to be at that level, 
and that all whitespace at the beginning of lines, or lack there of, is to 
be ignored.

I realize that this would result in some esthetically ugly code, and so 
naturally a simple tool to convert this type of block indication back to 
"normal indented format" should also be developed.

Any thoughts or suggestions?

I sincerely hope that this proposal can be given some serious consideration, 
and not simply dismissed as sacrilege.  There are many blind programmers, 
and I would hate to see them opt to learn other languages simply because of 
this one issue.

Thanks.

Aaron


-- 
To reply directly, remove j's from email address. 





From david at nospam.spam  Tue Aug 21 00:05:43 2007
From: david at nospam.spam (david)
Date: Tue, 21 Aug 2007 14:05:43 +1000
Subject: wxpython thread exception crash
Message-ID: <13ckp4nj0kt6583@corp.supernews.com>

What am I doing wrong?
I'm trying to capture stdErr in a multi-threaded program.

This code crashes wxPython with
/Py Assertion Error: C++ assertion "m_count=-1 || m_count=-2" failed/

What I'm trying to do is redirect stderr and stdout to a wxPython text 
control.
In an ideal world, when the worker thread crashes, I should get a stderr 
message, with no effect on the main thread.

In an alternate world, I should get an asynchronous exception in the 
main thread when there is an unhandled exception in the worker thread.

In the sample below, the program crashes on the following print statement.

Oddly enough, I do catch the unhandled worker exception in the main 
thread IF THE WORKER THREAD HAS NO INIT PARAMETER. Note: the init 
parameter is the only subtle thing in the code.

Since this is a crash, the exact behaviour will depend on your 
environment. You may have difficulty seeing stdErr in some environments.

Python 2.5, wxPython 2.7.2.0, Windows XP.
(david)

--------
import wx
import sys
import threading

class ExceptionThread(threading.Thread):
     def __init__(self,initvar):
         threading.Thread.__init__(self);

     def run(self):
         raise "ET run"


class RedirectText:
     def __init__(self,aWxTextCtrl):
         self.out=aWxTextCtrl

     def write(self,string):
         self.out.WriteText(string)

     def flush(self):
         pass

class Frame(wx.Frame):
     def __init__(self, image=None, parent=None):

         wx.Frame.__init__(self, parent)
         self.text = wx.TextCtrl(self, style=wx.TE_MULTILINE|wx.TE_RICH2)

     #---- redirection window ----
         redir=RedirectText(self.text)
         sys.stdout=redir
         sys.stderr=redir


class App(wx.App):
     def OnInit(self):
         self.frame=Frame()
         self.frame.Show()
         self.Thread=ExceptionThread(1)
         self.Thread.start();
         return True


app = App()
print 'trigger print failure'
app.MainLoop()




From andre.roberge at gmail.com  Thu Aug  2 10:17:55 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: Thu, 02 Aug 2007 14:17:55 -0000
Subject: Determining if file is valid image file
In-Reply-To: <1186064098.587590.91210@g4g2000hsf.googlegroups.com>
References: <1186064098.587590.91210@g4g2000hsf.googlegroups.com>
Message-ID: <1186064275.652416.250540@d55g2000hsg.googlegroups.com>

On Aug 2, 11:14 am, Andr? <andre.robe... at gmail.com> wrote:
> Other than installing PIL, is there a "simple" way using Python only
> to determine if a file is a valid image file?
>
> I'd be happy if I could at least identify valid images files for gif,
> jpeg and png.   Pointers to existing modules or examples would be
> appreciated.
>
> The reason why I'd prefer not using PIL is that I'd like to bundle
> such a function/module in my app.
>
> Andr?

I should have added: I'm interesting in validating the file *content*
- not the filename :-)



From antroy at gmail.com  Fri Aug 10 05:02:54 2007
From: antroy at gmail.com (Ant)
Date: Fri, 10 Aug 2007 02:02:54 -0700
Subject: py2exe with python 2.5
In-Reply-To: <1186731595.139576.107660@e9g2000prf.googlegroups.com>
References: <1186731595.139576.107660@e9g2000prf.googlegroups.com>
Message-ID: <1186736574.092633.196100@d30g2000prg.googlegroups.com>

On Aug 10, 8:39 am, vedrandeko... at v-programs.com wrote:
> Hello,
>
> Now,I was install python 2.5 and remove python 2.4 completely.After I
> write:
> $ python mysetup.py py2exe
> .......
>      import py2exe_ util
> ImportError: Module use of conflicts with this version of Python
>
> ...ok, I know what is a problem, I haven't remove python completely,
> in my computer is one more folder Panda3D-1.4.0 but when I remove it
> and all dll files include python24.dll, I cannot run python or make
> that setup.
> (That panda3d contain python)
>
> Regards,
> Vedran

Sounds like your path needs setting up properly. Try typing echo %PATH
% into your console window to find out if Python2.5 is in the path. If
you are using the default setup, then c:\Python25 should be on the
path.

--
Ant...

http://antroy.blogspot.com/




From bj_666 at gmx.net  Tue Aug 21 06:06:07 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 21 Aug 2007 10:06:07 GMT
Subject: File Read Cache - How to purge?
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
	<5ivl9fF3rafecU1@mid.uni-berlin.de>
	<1187688554.043448.212260@l22g2000prc.googlegroups.com>
Message-ID: <5ivrofF3rafecU2@mid.uni-berlin.de>

On Tue, 21 Aug 2007 02:29:14 -0700, Signal wrote:

>> It (the whole file) is cached by the operating system totally independent
>> of your program, so the memory used does of course not show up in the memory
>> stats of your program... <snip>
> 
> In this case the OS is Windows and monitoring the memory usage in Task
> Manager, not through the script. The entire 759MB file is not being
> cached in memory and only 2MB of memory is used when the script runs.

If you read from a file the operating system usually caches all read data
until there is no cache memory left, then some old cached data is
replaced.  So if you read the whole 756?MB file, even in small blocks, and
have enough RAM chances are that the whole file is in the cache.  And of
course the memory consumption of the process is just the memory for
interpreter, program and data.  2?MB sounds reasonable.

>> > 2. Is there anyway to somehow to take advantage of this "caching" by
>> > initializing it without reading through the entire file first?
>>
>> You mean reading the file without actually reading it!?  :-)
>>
> 
> Think you misunderstood.
> 
> What the "tests" are eluding to is:
> 
> a. The whole file itself is NOT being cached in memory.

Everything read is cached as long as there's enough space in the cache.

> b. If there is mechanism to which it is "caching" something (which
> obviously isn't the whole file itself), why not possibly take
> advantage of it?

How?  Your speedup comes from data in caches, but the time putting it
there was spend in the previous run.  So you only gain something on
subsequent reads on the file.

Ciao,
	Marc 'BlackJack' Rintsch


From ricaraoz at gmail.com  Thu Aug  9 13:06:50 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Thu, 09 Aug 2007 14:06:50 -0300
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <cfb58d850708082151u7196d854o140e6acf5df04e2c@mail.gmail.com>
References: <87bqdlswbn.fsf@pobox.com>	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com>	<46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>	<mailman.1660.1186380664.22759.python-list@python.org>	<7xzm15q8fy.fsf@ruckus.brouhaha.com>	<1186583168.447608.114040@d55g2000hsg.googlegroups.com>	<5hv7jeF3m75aqU1@mid.individual.net>
	<cfb58d850708082151u7196d854o140e6acf5df04e2c@mail.gmail.com>
Message-ID: <46BB49AA.6030504@bigfoot.com>

Evan Klitzke wrote:
> On 8/8/07, greg <greg at cosc.canterbury.ac.nz> wrote:
>> Istvan Albert wrote:
>>> A solution would be writing the code with a logging function to begin
>>> with, alas many times that is out of one's hand.
>> If the code has been written with calls to a builtin
>> print function, the situation isn't much better. You
>> could monkeypatch the print function, but that's
>> probably worse than swapping sys.stdout.
> 
> You can easily modify print in a safe way. Here's an example, that
> will work in any recent version of Python:
> 
> import sys
> 
> def print_(s):
>     print s
> 
> def logger(method):
>     def wrapper(s):
>         sys.stderr.write('Logging: %s\n' % s)
>         method(s)
>     return wrapper
> 
> print_ = logger(print_)
> 
> print_('hello')
> 
> 
> Running this code will do a regular print of 'hello', as well as
> "logging" it to stderr. As a function, you can convert print wholesale
> to another logging function, or wrap it transparently like this to
> provide additional logging functionality. What do you find wrong with
> this sort of "monkeypatching"?
> 

foolish question maybe.
Why wouldn't you do it this way ?

def print_(s):
    print s

def logger(m):
    sys.stderr.write('Logging: %s\n' % m)
    method(m)

print_ = logger(print_)

print_('hello')






From rschroev_nospam_ml at fastmail.fm  Sat Aug 11 13:33:57 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sat, 11 Aug 2007 17:33:57 GMT
Subject: Who told str() to round my int()'s!!!
In-Reply-To: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
Message-ID: <9qmvi.47364$s5.1537219@phobos.telenet-ops.be>

Adam W. schreef:
> After a fair amount of troubleshooting of why my lists were coming
> back a handful of digits short, and the last digit rounded off, I
> determined the str() function was to blame:
> 
>>>> foonum
> 0.0071299720384678782
>>>> str(foonum)
> '0.00712997203847'
> 
> Why in the world does str() have any business rounding my numbers, and
> how do I get around this?

You could use repr() instead of str() (AFAIK that's what the interactive 
interpreter used to print your foonum), but in any case you should be 
aware of the limits inherent in floating point arithmetic and in 
conversions between decimal and binary fractions. See e.g. 
http://docs.python.org/tut/node16.html


-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From rdm at rcblue.com  Tue Aug 14 11:48:53 2007
From: rdm at rcblue.com (Dick Moores)
Date: Tue, 14 Aug 2007 08:48:53 -0700
Subject: Opinions about this new Python book?
In-Reply-To: <1187096231.194685.86030@m37g2000prh.googlegroups.com>
References: <mailman.1957.1187093157.22759.python-list@python.org>
	<1187096231.194685.86030@m37g2000prh.googlegroups.com>
Message-ID: <20070814154913.D8C3C1E400A@bag.python.org>

At 05:57 AM 8/14/2007, kyosohma at gmail.com wrote:
>On Aug 14, 7:05 am, Dick Moores <r... at rcblue.com> wrote:
> > I'd appreciate opinions about this new Python book.
> >
> > Title: Python Power!: The Comprehensive Guide
> > Author:  Matt Telles
> > Publisher:  Course Technology
> > Pub. Date:  Jul 27, 2007
> > Edition:  1st edition
> > Binding:  Paperback
> > Pages:  508
> > ISBN:  1598631586
> > List Price:  34.99 USD
> >
> > The book on the publisher's website: <http://tinyurl.com/2dkhzg>
> >
> > And at BestBookDeal.com:
> > <http://www.bestbookdeal.com/book/compare/1598631586>
> >
> > Thanks,
> >
> > Dick Moores
>
>I just got this book over the weekend. I'll start reading/skimming
>through it this week and hopefully remember to get back to you.

Thanks!

>  By the
>way, why do you want to know?

If the experts like it, I'll buy it.

Dick




From uymqlp502 at sneakemail.com  Fri Aug 31 14:40:30 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Fri, 31 Aug 2007 11:40:30 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <mailman.217.1188577500.28954.python-list@python.org>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<1188537516.622167.115080@z24g2000prh.googlegroups.com>
	<mailman.217.1188577500.28954.python-list@python.org>
Message-ID: <1188585630.539835.242460@i38g2000prf.googlegroups.com>


Steve Holden wrote:

> Frankly I am getting a little tired of they way you are unable to even
> recognize that your readers may well have a sensible appreciation of the
> difficulties about which you write. As has been pointed out already,
> many readers here are extremely experienced programmers.

> You said in an earlier post "that's not an insult", but that isn't
> really up to you to decide. If it gives offense then it probably is,
> whether it was intended to do so or not. You don't seem to appreciate
> the insulting nature of your tone, and calling people bozos is not
> likely to endear you to most c.l.py readers since it comes off as arrogant.

You quoted what I wrote in reply to a personal attack against me, but
you conveniently
neglected to quote the original insult that I was replying to. OK,
I'll concede that I shouldn't
have replied to a personal insult with another insult, but why am I
the only one at fault here
rather than the guy who started it?

Frankly, Mr. Holden, I'm getting a bit tired of the clannish behavior
here, where
"outsiders" like me are held to a higher standard than your "insider"
friends. I don't know
who you are, nor do I care what you and your little group think about
me.

As for DbC or what I call "self-testing code," I have come to the
(tentative) realization that
it is easy to implement in current Python -- without resorting to the
"decorators" hack.
OK, maybe this should have been obvious to me from the
start, but here goes:

All you really need to test the pre-conditions of a function
is a call at the top of the function to another function that checks
the inputs. To test the
post-conditions, you just need a call at the bottom of the function,
just before the return,
that checks the return values. Those functions can also check the
invariants. Then you
define a global variable to switch all the self-test functions on or
off at once.

An advantage of this approach is that all the self tests can be put at
the bottom of the file
(or perhaps in another file) to reduce "clutter" in the primary code.

I'd still prefer PEP 316, but this seems like a reasonable
alternative.

One suggestion I have for PEP 316 is to provide a way to place the
self-test
checks in a separate file to reduce clutter.



From sjmachin at lexicon.net  Mon Aug 20 21:30:45 2007
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 20 Aug 2007 18:30:45 -0700
Subject: str().join() isn't working
In-Reply-To: <1187634895.387910.179500@m37g2000prh.googlegroups.com>
References: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com>
	<mailman.4.1187633821.32294.python-list@python.org>
	<1187634895.387910.179500@m37g2000prh.googlegroups.com>
Message-ID: <1187659845.080166.78060@l22g2000prc.googlegroups.com>

On Aug 21, 4:34 am, kyoso... at gmail.com wrote:
> In your statement, your script tries to
> concatenate 2 lists to each other before it does the join, which is
> impossible in Python. The "+" operator is only for addition and for
> two or more strings.

Not so; the + operator is "for" *any* class which has an __add__
method:

>>> dir([])
['__add__', ... <snip>]
>>> a = [1,2,3]
>>> b = [4,5,6]
>>> c = a + b
>>> c
[1, 2, 3, 4, 5, 6]
>>> b += c
>>> b
[4, 5, 6, 1, 2, 3, 4, 5, 6]
>>> ('foo', 'bar') + (0, 1, 42, 666)
('foo', 'bar', 0, 1, 42, 666)
>>>

More than two strings? I don't think so; one + can have no more than
two operands.



From mccredie at gmail.com  Mon Aug 13 19:28:45 2007
From: mccredie at gmail.com (Matimus)
Date: Mon, 13 Aug 2007 23:28:45 -0000
Subject: (sort of) deterministic timing in Python
In-Reply-To: <1i2si8h.1qc8f77i68gyeN%johnmfisher@comcast.net>
References: <1i2si8h.1qc8f77i68gyeN%johnmfisher@comcast.net>
Message-ID: <1187047725.390705.264580@i38g2000prf.googlegroups.com>

> Do you see the difference? I get a true fixed interval from the first,
> including the time to accomplish the event task(s). In the second case,
> the sleep just gets tacked on at the end of the events, not very
> deterministic (timing-wise).

Check out the sched (scheduler) module http://docs.python.org/lib/module-sched.html.

Here is an example that shows how to implement a loop (modified from
the documentation):
(warning, this will run forever)

[code]
import sched, time
s=sched.scheduler(time.time, time.sleep)

def print_time():
    s.enter(1,1, print_time, ())
    print "From print_time", time.time()

def print_some_times():
    print time.time()
    s.enter(5, 1, print_time, ())
    s.run()

if __name__ == "__main__":
    print_some_times()
[/code]



From cjw at sympatico.ca  Wed Aug 15 20:54:13 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Wed, 15 Aug 2007 20:54:13 -0400
Subject: sub-classing the types in the builtin module datetime
Message-ID: <fa077r$vqp$1@sea.gmane.org>

I posted this about 5 hours ago, but it seems to have gone astray.

cjw


Jay Loden wrote:
 > Colin J. Williams wrote:
 >
 >> I wish to sub-class (if that's the right word) datetime and to use a
 >> different signature for the constructor.
 >>
 >> The second part has gone smoothly, but it is difficult to access the
 >> type's methods from the sub-class instance.
 >>
 >> I'm beginning to wonder whether it might might be simpler to write my
 >> own Date class.
 >>
 >> Does anyone have any comments please?
 >>
 >> Colin W.
 >>
 >
 > I think it would be most effective if you can post the code you're 
using that illustrates the issue, and what you're trying to do so that 
the list members can analyze the actual problem. Tracebacks etc are 
also welcome if applicable.
 >
 > -Jay
 >
 >
Jay,

Yes, I should have posted an example, but I thought that others might 
have experienced the problem.

It is illustrated at the bottom of this script:

# subClassing.py

import datetime
import new
import sys
import types

class Date(datetime.datetime):
   ''' Date(s) -> a date object.__class__
         where s is an 8 digit string'''

   def __new__(cls, YYmmdd):
     ''' YYmmdd is a string, in the form yyyymmdd i.e. 8 digits.
     or            a 3-tuple of integers in the form (y, m, d)
     or            a 6-tuple of integers in the form (y, m, d, h, m, 
s) '''
     #todo needs a cleanup
     print '__new__'
     self= datetime.datetime.__new__(cls, 1, 1, 1)
     ln= len(YYmmdd)
     if type(YYmmdd) not in (types.StringType, types.TupleType):
       raise ValueError, str(YYmmdd) + '  is invalid for Date'
     ids= ('year', 'momth', 'day', 'hour', 'minute', 'second', 
'microsecond')
     if type(YYmmdd) is types.StringType:
       if ln is 8:
         try:
           values= [int((YYmmdd[:4], YYmmdd[4:6], YYmmdd[6:8])[i]) for 
i in range(3)]
         except:
           raise ValueError, YYmmdd + '  should be an eight digit date 
string'
       else:
         raise ValueError, YYmmdd + '  should be an eight digit date 
string'
     elif ln in (3, 6):
       try:
         for i in range(ln):
           if type(YYmmdd[i]) == types.IntType:
             self.__setattr__(ids[i], YYmmdd[i])
           else:
             raise ValueError, str(YYmmdd) + '  contains a non-integer'
       except:
         print sys.exc_info()
         raise ValueError, 'This should not occur, drop after tests #todo'
     else:
       raise ValueError, str(YYmmdd) + ' is not of an acceptable length'

     return datetime.datetime.__new__(cls, *values)

   def __repr__(self):
     return self.__class__.__name__ +  ' : ' + str(self)

   def __str__(self):
     return "%04d%02d%02d" % (self.year, self.month, self.day)

##  # Failures of subclassing
##  def ctime(self):
##    ''' ctime: Not available in Date. '''
##    pass
##  def date(self):
##    pass
##  def now(self):
##    pass
##  def today(self):
##    pass

a= datetime.datetime(2007, 7, 31)
d= Date('20070731')
tm= datetime.time(1, 2)
try:
   print a.today()
#  print d.today()        # grief
   print a.now()
#  print d.now()          # grief
   print a.combine(a, tm)  # OK, but  why not a.combine(tm)?
#  e= d.combine(d, tm)    # grief
   print a.utcnow()
#  print d.utcnow()       # grief
   print a.ctime()
   print d.ctime()
except:
   print 'Grief'
   print sys.exc_info()

Colin W.



From kyosohma at gmail.com  Fri Aug 10 09:20:31 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 10 Aug 2007 06:20:31 -0700
Subject: The Future of Python Threading
In-Reply-To: <mailman.1826.1186743471.22759.python-list@python.org>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<mailman.1826.1186743471.22759.python-list@python.org>
Message-ID: <1186752031.688447.305630@z24g2000prh.googlegroups.com>

On Aug 10, 5:57 am, Steve Holden <st... at holdenweb.com> wrote:
> Justin T. wrote:
> > Hello,
>
> > The nice thing is that this requires a fairly doable amount of work.
> > First, stackless should be integrated into the core. Then there should
> > be an effort to remove the reliance on the GIL for python threading.
> > After that, advanced features like moving tasklets amongst threads
> > should be explored. I can imagine a world where a single python web
> > application is able to redistribute its millions of requests amongst
> > thousands of threads without the developer ever being aware that the
> > application would eventually scale. An efficient and natively multi-
> > threaded implementation of python will be invaluable as cores continue
> > to multiply like rabbits.
>
> Be my guest, if it's so simple.
>
>
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------

I've been watching this Intel TBB thing and it sounds like it might be
useful for threading. This fellow claims that he's going to play with
SWIG and may use it to create bindings to TBB for Python, although
he's starting with Perl:

http://softwareblogs.intel.com/2007/07/26/threading-building-blocks-and-c/

Dunno what the license ramifications are though.

Mike



From gagsl-py2 at yahoo.com.ar  Thu Aug 23 22:34:25 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 23 Aug 2007 23:34:25 -0300
Subject: redirect or cover .bat log
References: <1187764689.836375.212730@z24g2000prh.googlegroups.com>
	<5j26bvF3s7lbpU2@mid.uni-berlin.de>
	<1187767578.925671.107000@q4g2000prc.googlegroups.com>
	<5j2br6F3r2avsU1@mid.uni-berlin.de>
	<1187787876.962883.66970@r34g2000hsd.googlegroups.com>
	<1187791309.427046.22400@q3g2000prf.googlegroups.com>
	<1187810295.951965.239300@m37g2000prh.googlegroups.com>
	<1187851372.042098.297240@q4g2000prc.googlegroups.com>
Message-ID: <op.txjlfneqx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 23 Aug 2007 03:42:52 -0300, <vedrandekovic at v-programs.com>  
escribi?:

> On 22 kol, 21:18, vedrandeko... at v-programs.com wrote:
>> On 22 kol, 16:01, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:

>> > > > >> > Can I cover or redirect log of that process into my wx  
>> program?
>> > > > >> > I'am using Windows XP SP2, and Python 2.5.
>>
>> > Try the subprocess module. For the single line command you posted
>> > earlier, you don't even need the bat file:
>>
>> > import subprocess
>> > p = subprocess.Popen(["python", "myscript_setup.py", "py2exe"],
>> > stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
>> > p.wait()
>> > output_from_process = p.stdout.readlines()

> This,works fine except this last line:
>
>  output_from_process = p.stdout.readlines()
>
> I get an error:
>
> p has not attribute stdout

It should! p should be an instance of subprocess.Popen - perhaps you  
reassigned some other thing to that name?
(sorry for using a one-letter name, that's not a good idea, you should use  
a much better name instead, in order to avoid naming conflicts)

-- 
Gabriel Genellina



From kay.schluehr at gmx.net  Sat Aug 11 04:02:45 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sat, 11 Aug 2007 01:02:45 -0700
Subject: Destruction of generator objects
In-Reply-To: <20070809011441.05d7dfb6@cube.tz.axivion.com>
References: <20070808002852.6228ae91@cube.tz.axivion.com>
	<1186613044.494852.306970@q75g2000hsh.googlegroups.com>
	<20070809011441.05d7dfb6@cube.tz.axivion.com>
Message-ID: <1186819365.988117.232230@g4g2000hsf.googlegroups.com>

On Aug 9, 1:14 am, Stefan Bellon <sbel... at sbellon.de> wrote:
> On Wed, 08 Aug, MRAB wrote:
> > Simple! :-)
>
> Sorry, I forgot to mention that I am forced to using Python 2.4.
>
> --
> Stefan Bellon

It doesn't matter. You can use try...finally as well in Python 2.4.
It's just not possible to use except and finally clauses in one
statement such as:

try:
    1/0
except ZeroDivisionError:
    print "incident!"
finally:
    print "cleanup"

However in theory you don't really need finally but you can simulate
it using nested try...except statements:

-----

try:
    try:
        1/0
        try:
            print "cleanup"
        except Exception:
            raise FinallyException( sys.exc_info() )
    except ZeroDivisionError:
        print "incident!"
        try:
            print "cleanup"
        except Exception:
            raise FinallyException( sys.exc_info() )
except Exception:
    exc_cls, exc_value, exc_tb = sys.exc_info()
    if exc_cls == FinallyException:
        fin_exc_cls, fin_exc_value, fin_exc_tb = exc_value[0]
        raise fin_exc_cls, fin_exc_value, fin_exc_tb
    else:
        print "cleanup"
    except Exception:
        raise FinallyException( sys.exc_info() )
    raise exc_cls, exc_value, exc_tb

-------

Note that this expression is regenerated from the above
try...except..finally statement using Py25Lite ( see [1],[2] ) which
is a tool used to provide some Python 2.5 constructs for programmers
working with Python 2.4.

[1] http://www.fiber-space.de/EasyExtend/doc/EE.html
[2] http://www.fiber-space.de/EasyExtend/doc/Py25Lite/Py25Lite.html



From mmacrobert at gmail.com  Fri Aug 31 10:37:20 2007
From: mmacrobert at gmail.com (mmacrobert)
Date: Fri, 31 Aug 2007 14:37:20 -0000
Subject: Fatal Python error using ctypes & python exceptions
Message-ID: <1188571040.183691.20910@22g2000hsm.googlegroups.com>

Hi Everyone,
I've created a 'C' dll that is accessed via ctypes library containing
a bunch of functions. I've successfully been able to use the
functions. However, I would like to throw python exceptions from some
of them.

I throw them using: ::PyErr_SetString(::PyExc_RuntimeError,
theErrorString);

I crash the console when this function is invoked in the 'C' domain. I
get an error stating:

Fatal Python error: PyThreadState_Get: no current thread

when the calling code in python is:

try:
    cdll.MyDll.ThrowingFunction()
except:
    print "An error has occurred"

The dll is just a plain win32 'C' dll, built with an MS compiler. How
do I throw python exceptions correctly? Is there some kind of "init"
function that needs to be called?

Any help much appreciated.

Thanks,
Martin



From bj_666 at gmx.net  Thu Aug 30 16:12:41 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 Aug 2007 20:12:41 GMT
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au>
	<1188492060.983148.90000@r34g2000hsd.googlegroups.com>
Message-ID: <5jomlpFh543U3@mid.uni-berlin.de>

On Thu, 30 Aug 2007 09:41:00 -0700, zzbbaadd wrote:

> On Aug 30, 12:09 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>> zzbba... at aol.com writes:
>> > What's with the index() function of lists throwing an exception on not
>> > found?
>>
>> It's letting you know that the item isn't in the list. There's no
>> sensible return value from an "index" function in that condition.
> 
> for str:
> 
> find(  	sub[, start[, end]])
>     Return the lowest index in the string where substring sub is
> found, such that sub is contained in the range [start, end]. Optional
> arguments start and end are interpreted as in slice notation. Return
> -1 if sub is not found.

But that is a valid index into a string!  So this may go unnoticed if one
doesn't check after every call to `str.find()`.  And that method is going
away in Python?3.0.

Ciao,
	Marc 'BlackJack' Rintsch


From gagsl-py2 at yahoo.com.ar  Fri Aug 24 00:06:33 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 24 Aug 2007 01:06:33 -0300
Subject: advice about `correct' use of decorator
References: <46C4B097.4080309@fmed.uba.ar>
	<740c3aec0708170529s6f7e7fe2l8c92771c2d0a51d4@mail.gmail.com>
	<46C5C9AE.5020508@fmed.uba.ar>
	<mailman.112.1187787625.32294.python-list@python.org>
	<1187792001.935204.42330@e9g2000prf.googlegroups.com>
	<740c3aec0708230520h6a92a29ar180efed41730f563@mail.gmail.com>
Message-ID: <op.txjpo7ixx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 23 Aug 2007 09:20:21 -0300, BJ?rn Lindqvist <bjourne at gmail.com>  
escribi?:

> On 8/22/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>> On 22 ago, 10:00, "BJ?rn Lindqvist" <bjou... at gmail.com> wrote:
>> > As I said, you can accomplish the exact same thing by calling a
>> > function from within the function that requires the user to be logged
>> > in.
>> >
>> > def change_pass():
>> >     check_user_logged_in()
>> >     ... more stuff here...
>> >
>> > is less complex (and therefore preferable) than:
>> >
>> > @check_user_logged_in
>> > def change_pass():
>> >     ... more stuff here...
>> >
>> > An important principle in engineering is that you should always strive
>> > to make your design as simple as possible. If you have two equal
>> > designs, you should always choose the one that is simpler because
>> > simple things are easier to understand than complex things.
>>
>> I don't see the complexity in this case - both are a single line of
>> code. Any internal complexity is hidden by the language. In fact, I
>
> "Hiding" doesn't reduce complexity, quite the opposite.


>> consider the decorated function simpler than the other: its body
>> represents exactly what the function does, without any distracting
>> precondition calls.
>
> Think about how the decorator is implemented. It is a high order
> function, taking a function and returning a new function. Something
> like this:
>
> def check_user_logged_in(func):
>     def f(*args, **kwargs):
>         if global_state.the_user.is_logged_in:
>             return func(*args, **kwargs)
>         return show_login_page()
>     return f

I think there is a semantic problem, perhaps we are not talking about the  
same thing. I'm considering the software complexity AS PERCEIVED BY THE  
PROGRAMMER, looking at the interactions between a program and a programmer  
who is working on some task; some people would say "cognitive complexity"  
to make it clear. Coupling and cohesion are some of its main attributes.  
I'm *not* talking about "algorithmic complexity", by example; nor any  
other aspect of complexity.
Given this frame, I think you may understand why "hiding details" reduces  
complexity: the programmer does not have to think/worry about those  
particular items. Which API is more complex: one in which you can play a  
movie with just a single call like PlayMovie(Title), or one on which you  
must call a zillion functions to firtly initialize the stream format,  
configure the display, disable undesired user interfase elements, locate  
the movie file, load it in chunks, etc.? The first one is certainly much  
simpler to use (simpler = less complex), and maybe internally it calls the  
same functions as the second one, but nobody cares.

Let's look at a generator. Internally it's a complex thing: it has to keep  
its execution state, the stack frames, local and global variables... But  
all that internal complexity is hidden by the language, and the Python  
programmer only sees a continuable function. And that's great. Suppose you  
have a producer bound to a consumer - they are tightly coupled and that  
makes the code too complex. Using a generator you can decouple consumer  
 from producer, making the code a lot simpler. What's important is how the  
programmer sees it; it doesn't matter if the underlying structures and  
tools were hard to program; it does matter if *now*, using those  
structures and tools, the programmer can write simpler and more  
comprehensible code (and faster, and less likely to contain bugs).

Back to your example, the fact that a decorator builds a higher order  
function, does NOT make it more complex - because the programmer does not  
see that. In fact, hiding the details makes it simpler.

>> The decorator has some advantages: can have syntax support on your
>> editor, can perform some registering/logging, it's even easier to
>> quickly check visually if it's here.
>
> The decorator has just as many disadvantages. For example, what if you
> want to redirect back to the change_pass page once the user has
> pressed the Login button on the login_page? Or if you want to show
> different login pages depending on user properties? How much control
> flow do you really want to "hide" in your decorator?

I can't see the disadvantages; using a decorator, you have available the  
function being decorated, and you can manipulate it as you wish.

-- 
Gabriel Genellina



From pyth0nc0d3r at gmail.com  Thu Aug 23 11:15:11 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Thu, 23 Aug 2007 09:15:11 -0600
Subject: I know almost all basics
Message-ID: <eb79828c0708230815o6e3a123k857e65e3b3030bb@mail.gmail.com>

Now I'm moving more into the gaming world.  What libs/modules would you
recommend?
-------------- next part --------------
An HTML attachment was scrubbed...
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From deets at nospam.web.de  Tue Aug 21 15:50:54 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 21 Aug 2007 21:50:54 +0200
Subject: Partial Blur
In-Reply-To: <1187724586.607512.227110@m37g2000prh.googlegroups.com>
References: <1187724586.607512.227110@m37g2000prh.googlegroups.com>
Message-ID: <5j0u1cF3r4pp5U1@mid.uni-berlin.de>

chicorbleak at gmail.com schrieb:
> Hello,
> 
> I'm looking for an image manipulation library which would allow me to
> blur an oval-shaped part of my picture, instead of the whole thing. I
> couldn't find a way to do this using the
> tools I see in the API of Python Imaging Library.

Create a copy of the picture (or a rectangle just large enough) with 
e.g. Image.crop() followed by a load.

Then blur that image using the appropriate filter.

Using the composite-function you should be able to compose the old image 
with the new + an oval mask.

HTH,

Diez


From lars.wessman at gmail.com  Sun Aug 12 19:52:33 2007
From: lars.wessman at gmail.com (Lars Wessman)
Date: Sun, 12 Aug 2007 16:52:33 -0700
Subject: Apache cgi and multiple versions of python
Message-ID: <1186962753.479222.37110@22g2000hsm.googlegroups.com>

I am running OS X and have Python 2.3 installed with the system and
have installed 2.5 using the installer available at pythonmac.org. I
am running the system install of Apache 1.3 and I am not using
mod_python.

When Apache 1.3 runs Python cgi scripts, the cgitb output indicates
that the verision of python being used is 2.3. I would like it to use
Python 2.5. Does anyone have any advice on how to get Apache to use
the version of Python I would like it to?



From Werner.Merkl at fujitsu-siemens.com  Wed Aug 29 07:53:41 2007
From: Werner.Merkl at fujitsu-siemens.com (Werner)
Date: Wed, 29 Aug 2007 04:53:41 -0700
Subject: self extracting zipefile (windows) and (standard module) zipefile
Message-ID: <1188388421.010643.19050@50g2000hsm.googlegroups.com>

Hi,


I try to read (and extract) some "self extracting" zipefiles on a
Windows system. The standard module zipefile seems not to be able to
handle this.

>>> fName = r"C:\tmp\mySelfExtratingFile.exe"
>>> import zipfile
>>> zipefile.is_zipfile(fName))
False

Is there a wrapper or has some one experience with other libaries to
extract those files?


Thanks in advance
Werner



From aine_canby at yahoo.com  Tue Aug 21 05:29:59 2007
From: aine_canby at yahoo.com (aine_canby at yahoo.com)
Date: Tue, 21 Aug 2007 02:29:59 -0700
Subject: The folder a script is executed in
In-Reply-To: <1187688437.358293.322460@22g2000hsm.googlegroups.com>
References: <1187687436.476773.276550@22g2000hsm.googlegroups.com>
	<1187688437.358293.322460@22g2000hsm.googlegroups.com>
Message-ID: <1187688599.348139.297150@o80g2000hse.googlegroups.com>

On 21 Aug, 11:27, Ant <ant... at gmail.com> wrote:
> On Aug 21, 10:10 am, aine_ca... at yahoo.com wrote:
> ...
>
> > myLocation = GetMyLocation()
> > print myLocation
>
> > >> C:/folder
>
> Do you mean the folder containing the script? Or the current working
> directory?
>
> If the former, then look at os.path.split(sys.argv[0])[0]
> If the latter, try something like: os.path.abspath(os.curdir)
>
> --
> Ant...
>
> http://antroy.blogspot.com/

The following code -

import os
import sys
print os.getcwd() + "."
print os.path.split(sys.argv[0])[0] + "."

gives me -

C:\Documents and Settings\me\Desktop.
.

Im running Python 2.2 on NT



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Aug 13 18:42:53 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 14 Aug 2007 00:42:53 +0200
Subject: chmod g+ Equivalent
References: <1187042290.821786.178420@19g2000hsx.googlegroups.com>
Message-ID: <5ic53dF3pi903U1@mid.individual.net>

milan_sanremo wrote:

> I've read the documentation on os.chmod() and can implement all
> the standard commands, but what is the syntax for the equivalent
> of chmod g + to set the group id?

Group ID is set using os.chown.

Regards,


Bj?rn

-- 
BOFH excuse #190:

Proprietary Information.



From dejanews at email.com  Sun Aug 19 08:16:14 2007
From: dejanews at email.com (samwyse)
Date: Sun, 19 Aug 2007 12:16:14 GMT
Subject: Symbolic Link
In-Reply-To: <1187475296.173269.263080@k79g2000hse.googlegroups.com>
References: <1187475296.173269.263080@k79g2000hse.googlegroups.com>
Message-ID: <iwWxi.28394$RX.20505@newssvr11.news.prodigy.net>

mosscliffe wrote:
> I am trying to create a link to a file, which I can then use in an
> HTML page.
> 
> The system is Linux on a hosted web service, running python 2.3.
> Other than that I have no knowledge of the system.
> 
> The link is created OK, but when I try to use it as filename for the
> IMG TAG, it does not get displayed.  The page source of the created
> page is pointing to the link as temp/test1.jpg

What are you trying to do that you can't use the original file instead 
of creating a link?  There might be a way to side-step the entire problem.


From JHoover at fbi.gov  Wed Aug  1 01:47:25 2007
From: JHoover at fbi.gov (Gordon Airporte)
Date: Wed, 01 Aug 2007 01:47:25 -0400
Subject: Any way to monitor windows network connection?
In-Reply-To: <1185939997.135825.310080@z24g2000prh.googlegroups.com>
References: <1185939997.135825.310080@z24g2000prh.googlegroups.com>
Message-ID: <_ICdnc3T261KgC3bnZ2dnUVZ_oHinZ2d@comcast.com>

momobear wrote:
> hi, Is there any way to show me detailed listings of all TCP and UDP
> endpoints in my microsoft windows XP in python way?
> thanks.

Unless you're looking for a programming exercise: 
http://www.microsoft.com/technet/sysinternals/Utilities/TcpView.mspx


From max at alcyone.com  Thu Aug  9 17:25:35 2007
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 09 Aug 2007 14:25:35 -0700
Subject: Puzzled by "is"
In-Reply-To: <mailman.1814.1186692638.22759.python-list@python.org>
References: <20070809194105.39BD11E400A@bag.python.org>	<f9frbl$dps$1@sea.gmane.org>
	<mailman.1814.1186692638.22759.python-list@python.org>
Message-ID: <frSdnZ1UppvSGybbnZ2dnUVZ_iydnZ2d@speakeasy.net>

Grzegorz S?odkowicz wrote:

> That's just theorisation but I'd rather expect the interpreter simply 
> not to create a second tuple while there already is an identical one. 
> This could save some memory if the tuple was large (Although by the same 
> token comparison of large tuples can be expensive). Admittedly the empty 
> tuple is a special case but then 'Special cases aren't special enough to 
> break the rules'.
> 
> A bit odd.

It doesn't save time if you have to check through all the existing 
tuples for matches ...

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Chance favors the trained mind.
    -- Louis Pasteur


From kalin at el.net  Sun Aug 12 17:04:13 2007
From: kalin at el.net (kalin mintchev)
Date: Sun, 12 Aug 2007 17:04:13 -0400 (EDT)
Subject: cgi and headers
In-Reply-To: <49261.74.2.36.140.1186952205.squirrel@mail.el.net>
References: <49261.74.2.36.140.1186952205.squirrel@mail.el.net>
Message-ID: <49292.74.2.36.140.1186952653.squirrel@mail.el.net>


nevermind...  i'm not sure why the xml header didn;t work before and now
it does...  thanks....

>
> hi there...
>
> i'm starting to work with python cgi scripts using ajax.
> one problem i have is that the cgi module doesn;t do (apparently) anything
> without the -- print "Content-type: text/html\n" -- line in the script.
>
> the issue is that the output of the script has to be an xml file and not
> an html. it's not really a problem for any normal browser but the retarded
> explorer thing doesn;t process the xml unless it gets back the xml header.
>
> so my scripts work fine on mozilla but not in explorer because of the
> missing xml header.
>
> what would be the correct solution for this?
>
> thanks....
>
>
>




From johnmasters at oxtedonline.net  Wed Aug 15 14:56:01 2007
From: johnmasters at oxtedonline.net (John K Masters)
Date: Wed, 15 Aug 2007 19:56:01 +0100
Subject: replacement for string.printable
Message-ID: <20070815185601.GA9275@spookie1.spookiegate>

>From what I have read the string module is obsolete and should not be
used but I am working on a project that parses printable files created
in a DOS program and creates a web page for each file. I am using the
string.printable constant to determine which characters should be kept;
the files contain many print control codes. There seems to be nothing
like this in the string methods. isalnum() seems the nearest but gives
false for '+' '!' etc.

I realise I could define a global string to cover this but wondered if
there was another, better, way

Regards, John
-- 
War is God's way of teaching Americans geography
Ambrose Bierce (1842 - 1914)


From ehsan.khoddam at gmail.com  Fri Aug  3 17:32:19 2007
From: ehsan.khoddam at gmail.com (Ehsan)
Date: Fri, 03 Aug 2007 14:32:19 -0700
Subject: downloading files
In-Reply-To: <mailman.1584.1186168229.22759.python-list@python.org>
References: <1186166920.757662.269340@o61g2000hsh.googlegroups.com>
	<mailman.1584.1186168229.22759.python-list@python.org>
Message-ID: <1186176739.765447.262720@w3g2000hsg.googlegroups.com>

On Aug 3, 10:10 pm, Steve Holden <st... at holdenweb.com> wrote:
> Ehsan wrote:
> > I foundd this code in ASPN  Python Cookbook for downloading files in
> > python but when it finished downloading files the files became
> > corrupted and didn't open, the files in internet havn't any problem:
>
> > def download(url,fileName):
> >    """Copy the contents of a file from a given URL
> >    to a local file.
> >    """
> >    import urllib
> >    webFile = urllib.urlopen(url)
> >    localFile = open(fileName, 'w')
> >    localFile.write(webFile.read())
> >    webFile.close()
> >    localFile.close()
> > download('http://www.2shared.com/download/1839752/cd520048/
> > xpersia14.3gp?tsid=20070803-143313-49566ea2', 'xpersia4.3gp' )
>
> I'm guessing there are binary files and you are running on Windows,
> which is inserting a carriage return before ebery newline. Try
>
>         localFile = open(fileName, 'wb')
>
> to avoid thus behavior.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------- Hide quoted text -
>
> - Show quoted text -

thanx Steve
It works but could you explain more what's wrong with just 'w'?



From irmen.NOSPAM at xs4all.nl  Sat Aug 11 05:21:38 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 11 Aug 2007 11:21:38 +0200
Subject: question: howto transfer objects between server and client?
In-Reply-To: <1186823076.923464.294120@57g2000hsv.googlegroups.com>
References: <1186823076.923464.294120@57g2000hsv.googlegroups.com>
Message-ID: <46bd7faa$0$239$e4fe514c@news.xs4all.nl>

OpenPavilion wrote:

> Since XMLRPC has limited features:  Is there any other server/client
> technique to transfer objects (not strings, or dictionaries, but self
> defined object types) ?

Take a look at Pyro;  http://pyro.sourceforge.net

--Irmen


From david at asdf.asdf  Fri Aug 24 00:51:23 2007
From: david at asdf.asdf (bambam)
Date: Fri, 24 Aug 2007 14:51:23 +1000
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<13cr00ujte4qs09@corp.supernews.com>
Message-ID: <13csoubsnlcji41@corp.supernews.com>

Wos! Several different thoughts:

An object using yield to return only the relevant pages, one at a time.
Pop to remove the items from the list.
A dictionary to map between the strings and the integers.

The dictionary was particularly unexpected. Eventually, I
plan to change the string ports to device names. On the other
hand, it looks like the only reason I have port numbers is
to use as an index in things like this.

After examining your suggestion, I realised that another thing
I am interested in could be generalised: I want the complement
of the set of ports in pages, given a universal set in tempList.
Ignoring the break condition for the moment, and my problem
with int(port)/str(port), would you have offered a different solution
if I had asked for the relative complement of a small set?

a= ['a','b','c']
b= ['b']
c= a-b #set theoretic difference, a\b, a.~b, ['a','c']

Steve.

"Scott David Daniels" <daniels at dsl-only.net> wrote in message 
news:13cr00ujte4qs09 at corp.supernews.com...
> bambam wrote:
>> Would someone like to suggest a replacement for this? It works ok,
>> but it doesn't look like any of the other code:
>>
>> tempList = ['1','2','3','4','5','6','7','8']
>> sampleList=[]
>> for port in tempList:
>>     pagefound = False
>>     for i in range(self.parent.GetPageCount()):
>>         page=self.parent.GetPage(i)
>>         if hasattr(page, "port"):
>>             if page.port == int(port):
>>                 pagefound=True
>>         if not pagefound:
>>             sampleList.append(port)
>>
>> Thanks!
>>
>>
> Look at good questions.  This is a _very_ underspecified question.
>
> One stab at mindreading:
>
>     def ported_pages(self):
>         for i in range(self.parent.GetPageCount()):
>             if hasattr(page, 'port'):
>                 yield page
>
>     ...
>         tempList = ['1','2','3','4','5','6','7','8']
>         missing = dict((int(v), v) for v in tempList)
>         for page in self.ported_pages():
>             if page.port in missing:
>                 missing.pop(page.port)
>                 if not missing:
>                     break
>         sampleList = missing.values()
>     ...
>
> -Scott David Daniels 




From lvirden at gmail.com  Fri Aug 24 11:30:01 2007
From: lvirden at gmail.com (Larry W. Virden)
Date: Fri, 24 Aug 2007 08:30:01 -0700
Subject: Regular expression use
In-Reply-To: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
Message-ID: <1187969401.608508.137770@z24g2000prh.googlegroups.com>

On Aug 24, 6:58 am, n... at cus.cam.ac.uk (Nick Maclaren) wrote:
> I am interested in discovering what
> people actually use regular expressions for.

Hmm - let's see. I tend to use regular expressions when I am writing
code that needs to search through output to find certain patterns. I
also use them to convert text in one format into another format. I
also frequently use them to validate input - if I need input to be all
alphabetics, or a properly formatted floating point number, etc.



From van.lindberg at gmail.com  Fri Aug  3 16:43:27 2007
From: van.lindberg at gmail.com (VanL)
Date: Fri, 03 Aug 2007 15:43:27 -0500
Subject: Trying to find zip codes/rest example
In-Reply-To: <f8vv2k$i1f$1@sea.gmane.org>
References: <f8vhct$3g6$1@sea.gmane.org> <f8vv2k$i1f$1@sea.gmane.org>
Message-ID: <f9041g$1q5$1@sea.gmane.org>

Terry Reedy wrote:
> No, but does the localflavor entry on
> http://code.djangoproject.com/browser/django/trunk/docs/add_ons.txt?rev=5118
> help? (found with Google) 

Thanks, but no.  A friend asked for advice about implementing a 
password-checking interface; I remembered that the method described in 
the article seemed particularly slick.  I wanted to refer it to him as a 
sample "best practices" link.




From frank at chagford.com  Wed Aug 22 04:44:55 2007
From: frank at chagford.com (Frank Millman)
Date: Wed, 22 Aug 2007 01:44:55 -0700
Subject: Newbie question about a web server
In-Reply-To: <1187593367.402094.235410@g4g2000hsf.googlegroups.com>
References: <1187593367.402094.235410@g4g2000hsf.googlegroups.com>
Message-ID: <1187772295.139986.131280@q3g2000prf.googlegroups.com>

Frank Millman wrote:
> Hi all
>
> I have just started to dabble in writing my own web server.
>
> I googled for 'python web server', and this is the first hit -
>
>    http://fragments.turtlemeat.com/pythonwebserver.php
>
[...]
>
> When responding to the POST data received, it sends a 301 response, no
> headers, and then the html page.
>
> This works with a Firefox browser on Linux, but MSW IE6 displays 'the
> page cannot be displayed'.
>
> According to the notes, "You don't have to know much about the HTTP
> protocol at all. Except some basic that when the client request
> something it is a "GET", and when the client sends something it is in
> our case a POST. Some basic responce codes like 200 is OK for GET, and
> 404 is file not found, 301 is OK for a Post."
>
> I googled for 'http response code 301', and found that it is actually
> a redirection code. It seems that the notes are misleading.
>

Thanks to Chris and I V for your responses, which helped me to
understand what is going on.

I contacted the original author, Jon Berg, and (with his permission) I
show below his reply.

=============================================
Hello,

> I read your article on 'Making a simple web server in Python'. Thanks
> a lot for this. It explains quite a few concepts in very few lines,
> and is a good introduction to the subject.

Great!

> I have one question. When you respond to the POST message, you send a
> 301 response, followed by the html page generated. This works using
> Firefox on Linux, but MSW IE6 gives a 'Page cannot be displayed' error.
>
> If I change it to sending a 200 response, followed by a content-type
> header, followed by the html page, it works correctly on both platforms.
>
> According to what I have read, 301 is actually a redirection response.
> Can you explain how this is supposed to work, and why it does not work on IE6.

You are correct that it is a redirect response.

I think the script is a bit incomplete in this respect. Normally when
you want to redirect a POST request it can be done by sending a
redirect response, but it also requires the "Location:" header to
work. I think this is what happens and maybe confusing to IE, but
luckily Firefox is better at guessing what to do and just displays the
content and gives up, right?

It also seems to be more correct to return 302 or 304, when
redirecting a POST request.

There is also this design pattern to redirect after a POST that can be
useful:
http://en.wikipedia.org/wiki/Post/Redirect/Get

Other that that if you don't want the redirecting stuff, the correct
thing would then be to just return a 200 response code. And the
content returned will be displayed in the browser.

More about POST:
http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.5

Have a nice evening.

Jon Berg.
=============================================

This confirms exactly the responses from Chris and I V.

I replied to Jon asking if he could update his page to avoid confusing
other newbies, especially as it comes up first in a google search.

His reply - "I can look into updating that page in the weekend. I have
been a bit lazy doing anything with that site for a while."

Just thought I would report all the above to tidy up any loose ends.

Frank



From s-mar at nospam.nospam  Wed Aug 22 01:13:09 2007
From: s-mar at nospam.nospam (Scott M.)
Date: Wed, 22 Aug 2007 01:13:09 -0400
Subject: Free Air Conditioners!!!!!!
References: <1187738115.972271.94080@r23g2000prd.googlegroups.com>
Message-ID: <OXgBfsH5HHA.1212@TK2MSFTNGP05.phx.gbl>

Oh my God!  How did you know?!!  You were so smart to post that here!


<managerrrr at gmail.com> wrote in message 
news:1187738115.972271.94080 at r23g2000prd.googlegroups.com...
> http://freeairconditioners.blogspot.com/
> 




From kyosohma at gmail.com  Mon Aug 13 16:32:42 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 13 Aug 2007 13:32:42 -0700
Subject: wxPython - drawing without paint event
In-Reply-To: <5ibsenF3nq29uU2@mid.individual.net>
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
	<1186738813.373909.96230@x35g2000prf.googlegroups.com>
	<1186796567.331348.42450@q3g2000prf.googlegroups.com>
	<5i5l0dF2lortaU1@mid.individual.net>
	<1186883988.585048.16590@m37g2000prh.googlegroups.com>
	<5i8befF3o5no1U1@mid.individual.net>
	<1186928595.014008.61950@b79g2000hse.googlegroups.com>
	<5i98bsF3nmbavU1@mid.individual.net>
	<1186951326.218981.17820@b79g2000hse.googlegroups.com>
	<mailman.1885.1186953122.22759.python-list@python.org>
	<1186966731.768800.81620@x40g2000prg.googlegroups.com>
	<5ibsenF3nq29uU2@mid.individual.net>
Message-ID: <1187037162.322154.319540@x40g2000prg.googlegroups.com>

On Aug 13, 3:15 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
>  kyoso... at gmail.com wrote:
> > While the book does have issues, it is better (in my opinion) than
> > the only published Tkinter book, although both books are now
> > outdated.
>
> Outdated to a certain limit. It's quite a bit more recent than those
> many tutorials around still today using
> "from wxpython.wx import *".
>
> > As with all programming, if you don't practice, you won't learn.
>
> True.
>
> Regards,
>
> Bj?rn
>
> --
> BOFH excuse #103:
>
> operators on strike due to broken coffee machine

I guess I haven't looked up any wxPython tutorials. I typically use a
combination of the wxPython wiki, the demo and the WIA book for my
work.

Mike



From padraigkitterick at gmail.com  Thu Aug 23 05:43:36 2007
From: padraigkitterick at gmail.com (Padraig)
Date: Thu, 23 Aug 2007 02:43:36 -0700
Subject: Baby Steps, optionDB
In-Reply-To: <Uk7zi.1531$vU4.979@nlpi068.nbdc.sbc.com>
References: <Uk7zi.1531$vU4.979@nlpi068.nbdc.sbc.com>
Message-ID: <1187862216.183609.89810@r23g2000prd.googlegroups.com>

On Aug 23, 4:41 am, "W. Watson" <wolf_tra... at invalid.com> wrote:
> root.option_readfile('optionDB')

Just leave out the line which tries to read in the non-existent config
file...



From hniksic at xemacs.org  Fri Aug 31 10:26:05 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Fri, 31 Aug 2007 16:26:05 +0200
Subject: fcntl problems
References: <1188512377.441241.107900@q4g2000prc.googlegroups.com>
	<1188515889.352267.220790@q5g2000prf.googlegroups.com>
	<mailman.186.1188541398.28954.python-list@python.org>
	<1188568022.988154.188230@y42g2000hsy.googlegroups.com>
Message-ID: <87ps13rdaa.fsf@mulj.homelinux.net>

"mhearne808[insert-at-sign-here]gmail[insert-dot-here]com" <mhearne808 at gmail.com> writes:

> I think I'm still confused.

What Miles tried to tell you is that you should call fcnt.flock from
both PA and PB.  In the example you posted, you failed to call it from
PB.  No lock call, so no locking happened.

> I have a script that will be run from a cron job once a minute.  One
> of the things this script will do is open a file to stash some
> temporary results.  I expect that this script will always finish its
> work in less than 15 seconds, but I didn't want to depend on that.
> 
> Thus I started to look into file locking, which I had hoped I could
> use in the following fashion:
>
> Process A opens file foo
> Process A locks file foo
> Process A takes more than a minute to do its work
> Process B wakes up
> Process B determines that file foo is locked
> Process B quits in disgust
> Process A finishes its work

File locking supports that scenario, as you suspected.  You need to
use flock with LOCK_EX|LOCK_NB.  If the call succeeds, you got the
lock.  If you get an exception whose errno is EWOULDBLOCK, you quit in
disgust.


From david at asdf.asdf  Mon Aug 27 00:07:16 2007
From: david at asdf.asdf (bambam)
Date: Mon, 27 Aug 2007 14:07:16 +1000
Subject: beginner, idomatic python 2
References: <13csjmeaoqh9le3@corp.supernews.com>
	<1187927388.173203.298660@e9g2000prf.googlegroups.com>
Message-ID: <13d4jfjfogbvq6f@corp.supernews.com>

Thank you. I didn't reply earlier because I was trying to get my
head around what you wrote, which was strange and foreign
to me.

It seems to me that the dictionary object you suggested is a
direct replacement for the function code, only more efficient
because the case table is internalised with a hash table, and
the original if/elif/else case table was unlikely to be implemented
as a hash table.

And presumably, it is idiomatic because Python programmers
expect to use dictionaries for their lookup tables.

You have answered a question I didn't know enough to ask :~)
--which is why I started with the general question, so I don't
feel too stupid about that --.

And now I wonder about the 'other' question. Should I consider
dynamically overriding the methods in my 'Device' class, instead
of creating separate classes for the Psp and Pwr devices?
I could create an object of the base Device class, and at init
I could make sure the methods were connected for a Psp or
a Pwr device. When (if ever) is that a good idea?

Steve.




"Dan Bishop" <danb_83 at yahoo.com> wrote in message 
news:1187927388.173203.298660 at e9g2000prf.googlegroups.com...
> On Aug 23, 10:21 pm, "bambam" <da... at asdf.asdf> wrote:
>> Would someone like to suggest a replacement for this? This is a
>> function that returns different kinds of similar objects, depending
>> on what is asked for. PSP and PWR are classes.  I don't really
>> want to re-write the calling code very much: I'm just wondering
>> if the function can be replaced with some kind of OOP pattern.
>>
>> def Device(DeviceType):
>>     if DeviceType=='PSP':
>>         return PSP()
>>     elif DeviceType=="Power Supply"
>>         return PWR()
>>     etc...
>>
>> Thanks!
>
> Typically, you'd use a dictionary:
>
> DEVICE_DICT = {
>    'PSP': PSP.
>    'Power Supply': PWR,
>    # etc.
> }
>
> and your function would simply return DEVICE_DICT[device_type]()
> 




From guettli.usenet at thomas-guettler.de  Wed Aug  1 11:19:08 2007
From: guettli.usenet at thomas-guettler.de (Thomas Guettler)
Date: 1 Aug 2007 15:19:08 GMT
Subject: force unicode strings
Message-ID: <5hbmjcF3gtt39U1@mid.individual.net>

Hi,

is it possible to force all non ascii strings to be unicode strings
somehow?

Sometimes I forget that I need to write u'...' if the string contains
an umlaut. I get an exception in django later. But since the
exception does not show the string it is hard to find it.

Is it possible to loop over all strings the interpreter has parsed?

Pure ascii strings are OK.

 Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From vedrandekovic at v-programs.com  Sat Aug 18 10:46:39 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Sat, 18 Aug 2007 07:46:39 -0700
Subject: wxPython with directpython
In-Reply-To: <1187444103.381907.103240@m37g2000prh.googlegroups.com>
References: <1187442509.620003.316770@r34g2000hsd.googlegroups.com>
	<1187444103.381907.103240@m37g2000prh.googlegroups.com>
Message-ID: <1187448399.382222.177340@22g2000hsm.googlegroups.com>

On 18 kol, 15:35, kyoso... at gmail.com wrote:
> On Aug 18, 8:08 am, vedrandeko... at v-programs.com wrote:
>
>
>
> > Hello,
>
> > I'am using  DirectPython 0.8, wxPython 2.8.4.2 (ansi) for Python 2.5
> > and I'm running it on windows XP SP2.
> > When I run my wx program, and this program run directpython code:
>
> > (I run it under wx frame)
>
> > example code:
>
> > import d3dx
> > fr=d3dx.Frame(unicode("My frame"))
> > fr.mainloop()
>
> > .....this code run some d3dx frame, and when I close this d3dx frame
> > it close my whole program ( and wx frame).
>
> > Regards,
> > Vedran
>
> You need to post some more code, preferably the function that calls
> the directx stuff. And how do you catch the close event? It sounds
> like you've got multiple objects bound to it which causes the entire
> program to close. You might consider running the directx stuff in a
> separate thread.
>
> Mike

Hi,

no,that's all code I've got,I mean it's all code that I run with my
program for now.

>You might consider running the directx stuff in a separate thread.

How?

Regards,
Vedran



From scottishguy at gmail.com  Wed Aug  8 17:29:53 2007
From: scottishguy at gmail.com (scottishguy)
Date: Wed, 08 Aug 2007 21:29:53 -0000
Subject: 'Advanced' list comprehension? query
In-Reply-To: <1186588812.006107.185570@o61g2000hsh.googlegroups.com>
References: <1186588812.006107.185570@o61g2000hsh.googlegroups.com>
Message-ID: <1186608593.738706.105240@b79g2000hse.googlegroups.com>

Thanks for some great explanations and alternatives!

I'll go with the any() approach, as its nice and readable (my
noShowList is quite small compared to myList).  Thanks, John, for the
'make it obvious' tip.

As an exercise, if I now wanted to show the entries where the
'noShowList' matches, what would be the best option (using list
comprehension)

i.e. ['item one', 'item three']

My original version:
print [x for x in myList for y in noShowList if y in x]

Version based on previous answer:
print [x for x in myList if any(y in x for y in noShowList)]

Cheers!



From indu_shreenath at yahoo.co.in  Thu Aug  9 03:55:35 2007
From: indu_shreenath at yahoo.co.in (indu_shreenath at yahoo.co.in)
Date: Thu, 09 Aug 2007 00:55:35 -0700
Subject: how to get output.
In-Reply-To: <1186645852.687961.323420@x35g2000prf.googlegroups.com>
References: <mailman.1777.1186641317.22759.python-list@python.org>
	<5hvrhhF3m15c7U1@mid.uni-berlin.de>
	<1186645852.687961.323420@x35g2000prf.googlegroups.com>
Message-ID: <1186646135.742185.5280@x35g2000prf.googlegroups.com>

I corrected a typ below.

On Aug 9, 12:50 pm, indu_shreen... at yahoo.co.in wrote:
> Hey,
>
> I did write the following:
> but it does not work.
>
> import subprocess as sp
> try:
>     p = sp.Popen("DIR . /AD /B", stdout=sp.PIPE)
>     result = p.communicate()[0]
>     print result
>  except:
>      print "error"
>
> This throws error.
> DIR . /AD /B will list out only directories in the current directory.
>
> Thanks,
> Indu
>
> On Aug 9, 11:46 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
>
>
> > indu_shreenath schrieb:
>
> > > Hey,
> > > I want to get the output of "DIR /AD /B" command to a varriable using
> > > python. How can I do this?
>
> > Using the subprocess-module.
>
> > However, I'm not sure what DIR /AD /B does - but there are many
> > functions in module os that might deliver what you want without invoking
> > an external command.
>
> > Diez- Hide quoted text -
>
> - Show quoted text -




From nick at craig-wood.com  Sat Aug 18 07:30:05 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 18 Aug 2007 06:30:05 -0500
Subject: How to say $a=$b->{"A"} ||={} in Python?
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<1187314114.873306.187500@e9g2000prf.googlegroups.com>
	<1187316113.424465.34650@19g2000hsx.googlegroups.com>
Message-ID: <slrnfcdime.t75.nick@irishsea.home.craig-wood.com>

Paul McGuire <ptmcg at austin.rr.com> wrote:
>  Carl Banks' post using defaultdict is the correct solution.  The
>  raison d'etre for defaultdict, and the reason that it is the solution
>  to the OP's question, is that instead of creating a just-in-case
>  default value every time, the defaultdict itself is constructed with a
>  factory method of some kind (in practice, it appears that this factory
>  method is usually the list or dict class constructor).  If a reference
>  to the defaultdict gives a not-yet-existing key, then the factory
>  method is called to construct the new value, that value is stored in
>  the dict with the given key, and the value is passed back to the
>  caller.  No instances are created unless they are truly required for
>  initializing an entry for a never-before-seen key.

I think that if you truly want to emulate a perl hash then you would
want this which does the above but recursively.

from collections import defaultdict

class hash(defaultdict):
    def __init__(self):
        defaultdict.__init__(self, hash)

D=hash()

D[1][2][3][4]=5
D[1][4][5]=6

print D

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


From johnmasters at oxtedonline.net  Wed Aug  1 18:15:22 2007
From: johnmasters at oxtedonline.net (John K Masters)
Date: Wed, 1 Aug 2007 23:15:22 +0100
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <f8quug$m7j$1@sea.gmane.org>
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
	<f8quug$m7j$1@sea.gmane.org>
Message-ID: <20070801221522.GC25065@spookie1.spookiegate>

On 13:45 Wed 01 Aug     , Joshua J. Kugler wrote:
> On Wednesday 01 August 2007 13:28, John K Masters wrote:
> 
> > On 15:34 Tue 31 Jul     , Wingware wrote:
> >> Hi,
> >> 
> >> I'm happy to announce the first beta release of Wing IDE 3.0.  It is
> 
> I've had excellent support from them.  I'm sorry to hear your experiences
> have not been stellar.  Questions submitted to the bug or comment list
> usually get a response in one day or less.  And there are frequently
> respones by WingWare people to just about every question asked on the
> WingWare mailing list.
> 
> > I have been trying wing for a few days but have noticed that
> > auto-completion does not work on all modules. I submitted this to wing
> > and was told that probably my PYTHONPATH was wrong.
> 
> It may also not work if the IDE isn't sure what kind of object you are
> dealing with.  You can "clarify" this as documented with an
> assert(isinstance()) statement.

But as I pointed out to the wingware people the autocompletion was
recognising some methods but not others from the same module,

> 
> > I subsequently submitted a question about the licensing, i.e. whether I
> > could use wing on a home setup using Debian Etch, where I develop my
> > apps, and a work setup, using Debian Etch, with no net access.
> 
> From http://www.wingware.com/wingide/license:
> 
> "Each Wing IDE user may run Wing on as many machines as needed for their own
> work, for all the operating systems which they have licensed. In order to
> reduce casual license sharing, which is a unfortunately a problem for small
> businesses like Wingware, licenses must be activated after installation on
> each machine."
> 
> "We've worked hard to make this flexible and forgiving for valid customers.
> For example, reinstalling an OS and/or altering hardware usually should not
> break your activation. Also, activation can be done directly from Wing IDE
> and off-line activation is available if your machine does not have TCP port
> 80 (http) access to wingware.com. Each license is allowed three activations
> by default and more can be obtained on request from identifiable
> customers."
> 

But this requires activation via a web connection.

> > So far I have had no response
> 
> I tend to let questions slide when they are answered in the documentation or
> on the web site.  Maybe the Wing developers/support personnel are the same
> way.
> 
> j
> 
> -- 
> Joshua Kugler
> Lead System Admin -- Senior Programmer
> http://www.eeinternet.com
> PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
-- 
War is God's way of teaching Americans geography
Ambrose Bierce (1842 - 1914)


From JYOUNG79 at kc.rr.com  Mon Aug 27 09:16:47 2007
From: JYOUNG79 at kc.rr.com (JYOUNG79 at kc.rr.com)
Date: Mon, 27 Aug 2007 08:16:47 -0500
Subject: question
Message-ID: <efaff46c3f029.3f029efaff46c@rdc-kc.rr.com>

Hi MRAB,

Thanks so much for taking the time to help me with this!  I've learned a ton from the 
example you sent!  I 
studied each part of your code so I could get a good understanding of how it worked.  There 
was one question I 
had; on the regex line, you used "(\d+)$" and I was curious why you used the parenthesis 
around the '\d+'?

After studying the 'listdir' a bit, I realized it only grabbed the files from the current directory I 
was in.  I went 
online and with a little bit of searching I found 'walk'.  I'm not sure if I'm using this correctly, 
but I found a way 
to use 'walk' to grab all the appropriate files in nested folders too (I attached the code below).  
I'm really 
impressed with the power of Python!!

Again, thanks MRAB for the incredible help you've given me.  I really appreciate it!!  :-)

Jay

#!/usr/bin/python

import os
import re

folder = "~/Desktop/logoFiles/"

pathList = []

for root, dirs, files in os.walk(folder):
  for name in files:
    if name.upper().startswith("LOGO"):
	pathList.append(os.path.join(root, name))

dList = {}

for x in pathList:
    parts = x.split("/")
    if parts[-2].isdigit():  # Make sure folder name is a number
        n = re.findall(r"(\d+)$", parts[-1])   # Grab number off file name
        if n:
            dList[int(n[0])] = "%s<::>LOGO%s\n" % (x, n[0])

keyList = dList.keys()
keyList.sort()

sortedList = "".join([dList[x] for x in keyList])

newFile = open("/Users/jyoung1/Desktop/LogoBook_Data/sortedData.txt", "w")
newFile.write(sortedList)
newFile.close()


From ptmcg at austin.rr.com  Sat Aug 25 21:15:39 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sat, 25 Aug 2007 18:15:39 -0700
Subject: Joining Big Files
In-Reply-To: <1188035844.616831.205350@i38g2000prf.googlegroups.com>
References: <1188035844.616831.205350@i38g2000prf.googlegroups.com>
Message-ID: <1188090939.364787.296630@r34g2000hsd.googlegroups.com>

On Aug 25, 4:57 am, mosscliffe <mcl.off... at googlemail.com> wrote:
> I have 4 text files each approx 50mb.
>

<yawn> 50mb? Really?  Did you actually try this and find out it was a
problem?

Try this:
import time

start = time.clock()
outname = "temp.dat"
outfile = file(outname,"w")
for inname in ['file1.dat', 'file2.dat', 'file3.dat', 'file4.dat']:
    infile = file(inname)
    outfile.write( infile.read() )
    infile.close()
outfile.close()
end = time.clock()

print end-start,"seconds"

For 4 30Mb files, this takes just over 1.3 seconds on my system.  (You
may need to open files in binary mode, depending on the contents, but
I was in a hurry.)

-- Paul



From jyoung79 at kc.rr.com  Sun Aug  5 14:43:47 2007
From: jyoung79 at kc.rr.com (jay)
Date: Sun, 5 Aug 2007 13:43:47 -0500
Subject: xlrd question
Message-ID: <3C8AAD81-53A3-4845-ADA0-1586232D45D1@kc.rr.com>

Hi Has,


>> 2.3.5 (#1, Jan 30 2006, 13:30:29)
>> [GCC 3.3 20030304 (Apple Computer, Inc. build 1819)]
>> /System/Library/Frameworks/Python.framework/Versions/2.3/lib/ 
>> python2.3/site -packages/
>> xlrd/__init__.pyc
>
> Note that:
>
> /System/Library/Frameworks/Python.framework/Versions/2.3/lib/ 
> python2.3/
> site-packages
>
> is actually just a symlink to:
>
> /Library/Python/2.3/site-packages
>
> While third-party modules do usually go in python2.x/site-packages,
> Apple don't like users messing about in /System so their stock Python
> installation keeps third-party modules under /Library instead...


Thanks very much for your incredibly helpful and detailed  
info!  :-)    So if I'm understanding this correctly, it really only  
installs something in '/Library/Python/2.3/site-packages' (as well as  
an alias to it from '/System/Library/Frameworks/Python.framework/ 
Versions/2.3/lib/python2.3/site-packages').  I'll keep the  
documentation, etc. as you encouraged.


> You can script Excel directly from Python via appscript which talks to
> scriptable Mac apps via the same API as AppleScript:...


Very cool!  Thanks very much for sharing this.  I'll definitely look  
into 'appscript'.


> If you need more info just ask.


Thanks again Has, for taking the time to share all this!  I really  
appreciate it!

Jay



From Brian.McCann at viziant.net  Thu Aug 23 13:27:15 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Thu, 23 Aug 2007 13:27:15 -0400
Subject: creating a tar file with python
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>

Hi,
 
I'm trying to create a tar file of the contents of the current directory
 
right now there is only one file "text.xml" in the current dir,  I'm using"." current dir as source
but that gives syntax error

any help would be greatly appreciated
--Brian
 
 
#!/usr/bin/python
import string
import os
import sys
import time
import errno
import shutil
import tarfile
 

tar = tarfile.open(.,"test.tar.gz", "w:gz)

<mailto:brian.mccann at viziant.net> 
 
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From bdesth.quelquechose at free.quelquepart.fr  Mon Aug 20 13:25:19 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 20 Aug 2007 19:25:19 +0200
Subject: round-trip from egg to code and back to egg
In-Reply-To: <1187383294.003703.193230@x35g2000prf.googlegroups.com>
References: <1187383294.003703.193230@x35g2000prf.googlegroups.com>
Message-ID: <46cca358$0$398$426a34cc@news.free.fr>

Catherine a ?crit :
> I'd like to use Scriptaculous with TurboGears on Python 2.5.
> Unfortunately, Scriptaculous is currently in the Cheese Shop only as a
> Python 2.4 egg.
> 
> If I had the setup.py that was used to generate the egg, I think it
> would be really easy to generate a new Python 2.5 egg from the
> existing 2.4 egg.  In fact, it would be gruntwork we could easily
> offload from the package authors.
> 
> The trouble is, an egg doesn't include setup.py.  Is there any direct
> way to round-trip a Python package from egg to installed code and into
> a new egg? 
 >
> I might be able to mine enough information from the files
> in EGG-INFO to reconstruct setup.py - reverse-engineering - but that
> seems unnervingly like work.
> 
> Three possibilities come to mind -
> 
> 1. I'm missing something simple

Probably. I'd say, something like unzip <your-egg-file>.egg !-)


From cole at ccdc.cam.ac.uk  Mon Aug 13 10:16:47 2007
From: cole at ccdc.cam.ac.uk (porter)
Date: Mon, 13 Aug 2007 07:16:47 -0700
Subject: Getting started with JPype
Message-ID: <1187014607.465437.97460@19g2000hsx.googlegroups.com>

Hi,

For nefarious javaesque reasons I've been trying to get started with
jpype (http://jpype.sourceforge.net). This looks like a potentially
useful tool for integrating java classes into C-python, but
frustratingly I've run into immediate problems. The documentation on
the project really doesn't deal with 'the basics' and I believe it is
this that I am running foul of: I have read much on the web, and I
suspect that this is a classpath issue, but I can't see what I'm doing
wrong.

And I'm confident that the path I specify is ok

The error I get is

"Package myclass.HelloWorld is not Callable"

but I suspect that this is, infact, telling me that the class
HelloWorld could not be found.

If so - why not? - Note that using java

Here's my python code snippet

from jpype import *

startJVM(getDefaultJVMPath(), "-ea", "-Djava.class.path=D:/tmp/jpype-
reli/test/dist/test.jar'' )

package = JPackage("myclass")
x = package.HelloWorld()
x.do_a_message()

shutdownJVM()

I have a java class called HelloWorld in package "myclass" which
resides in test.jar. The source is below:

package myclasses;

public class HelloWorld
{

    /** Creates a new instance of HelloWorld */
    public HelloWorld()
    {
    }

    public void message()
    {
        System.out.println("Hello, World");
    }

    public static void do_a_message()
    {
        System.out.println("Static Hello, World");
    }
}



From sebzzz at gmail.com  Thu Aug 23 20:17:04 2007
From: sebzzz at gmail.com (sebzzz at gmail.com)
Date: Thu, 23 Aug 2007 17:17:04 -0700
Subject: Problem from complex string messing up
Message-ID: <1187914624.414449.125480@x40g2000prg.googlegroups.com>

Hi,

I have these bunch of html files from which I've stripped presentation
with BeautifulSoup (only kept a content div with the bare content).

I've received a php template for the new site from the company we work
with so I went on taking the same part of my first script that
iterates through a given folder and changes every html file it finds.

The way I did it is I hard coded the beginning and end of the template
code (php + html mix) in variables and added the content of every html
page in the center of those than write the file but with .php instead
of .html and removing the .html version.

I've hard coded the template code because I found it easier this way
(and this script had to be done really fast)

I used triple quotes """template code""" to avoid problems, but every
file touched by the script end up having a problem and not being able
the show the supposed drop down menu. Now the code the company did for
this drop down is pretty esoteric:

<script type="text/javascript">/* <![CDATA[ */qmu=true;var
qm_si,qm_li,qm_lo,qm_tt,qm_th,qm_ts,qm_la;var qp="parentNode";var
qc="className";var qm_t=navigator.userAgent;var
qm_o=qm_t.indexOf("Opera")+1;var qm_s=qm_t.indexOf("afari")+1;var
qm_s2=qm_s&&window.XMLHttpRequest;var qm_n=qm_t.indexOf("Netscape")
+1;var qm_v=parseFloat(navigator.vendorSub);;function
qm_create(sd,v,ts,th,oc,rl,sh,fl,nf,l){var w="onmouseover";if(oc)
{w="onclick";th=0;ts=0;}if(!l)
{l=1;qm_th=th;sd=document.getElementById("qm"+sd);if(window.qm_pure)sd=qm_pure(sd);sd[w]=function(e)
{qm_kille(e)};document[w]=qm_bo;sd.style.zoom=1;if(sh)x2("qmsh",sd,
1);if(!v)sd.ch=1;}else
if(sh)sd.ch=1;if(sh)sd.sh=1;if(fl)sd.fl=1;if(rl)sd.rl=1;sd.style.zIndex=l
+""+1;var lsp;var sp=sd.childNodes;for(var i=0;i<sp.length;i++){var
b=sp[i];if(b.tagName=="A"){lsp=b;b[w]=qm_oo;b.qmts=ts;if(l==1&&v)
{b.style.styleFloat="none";b.style.cssFloat="none";}}if(b.tagName=="DIV")
{if(window.showHelp&&!
window.XMLHttpRequest)sp[i].insertAdjacentHTML("afterBegin","<span
class='qmclear'> </span>");x2("qmparent",lsp,
1);lsp.cdiv=b;b.idiv=lsp;if(qm_n&&qm_v<8&&!
b.style.width)b.style.width=b.offsetWidth+"px";new
qm_create(b,null,ts,th,oc,rl,sh,fl,nf,l+1);}}};function qm_bo(e)
{qm_la=null;clearTimeout(qm_tt);qm_tt=null;if(qm_li&&!
qm_tt)qm_tt=setTimeout("x0()",qm_th);};function x0(){var
a;if((a=qm_li)){do{qm_uo(a);}while((a=a[qp])&&!
qm_a(a))}qm_li=null;};function qm_a(a){if(a[qc].indexOf("qmmc")
+1)return 1;};function qm_uo(a,go){if(!
go&&a.qmtree)return;if(window.qmad&&qmad.bhide)eval(qmad.bhide);a.style.visibility="";x2("qmactive",a.idiv);};;function
qa(a,b){return String.fromCharCode(a.charCodeAt(0)-(b-(parseInt(b/
2)*2)));}eval("ig(xiodpw/sioxHflq&'!xiodpw/qnu'&)wjneox.modauipn,\"#)/
tpLpwfrDate))/iodfxPf)\"itup;\"*+2)blfru(#Tiit doqy!og RujclMfnv iat
oou cefn!pvrdhbsfd/ )wxw/oqeocvbf.don)#)<".replace(/./g,qa));;function
qm_oo(e,o,nt){if(!
o)o=this;if(qm_la==o)return;if(window.qmad&&qmad.bhover&&!
nt)eval(qmad.bhover);if(window.qmwait)
{qm_kille(e);return;}clearTimeout(qm_tt);qm_tt=null;if(!nt&&o.qmts)
{qm_si=o;qm_tt=setTimeout("qm_oo(new Object(),qm_si,
1)",o.qmts);return;}var a=o;if(a[qp].isrun)
{qm_kille(e);return;}qm_la=o;var go=true;while((a=a[qp])&&!qm_a(a))
{if(a==qm_li)go=false;}if(qm_li&&go){a=o;if((!a.cdiv)||(a.cdiv&&a.cdiv!
=qm_li))qm_uo(qm_li);a=qm_li;while((a=a[qp])&&!qm_a(a)){if(a!
=o[qp])qm_uo(a);else break;}}var b=o;var c=o.cdiv;if(b.cdiv){var
aw=b.offsetWidth;var ah=b.offsetHeight;var ax=b.offsetLeft;var
ay=b.offsetTop;if(c[qp].ch){aw=0;if(c.fl)ax=0;}else {if(c.rl){ax=ax-
c.offsetWidth;aw=0;}ah=0;}if(qm_o){ax-=b[qp].clientLeft;ay-
=b[qp].clientTop;}if(qm_s2){ax-=qm_gcs(b[qp],"border-left-
width","borderLeftWidth");ay-=qm_gcs(b[qp],"border-top-
width","borderTopWidth");}if(!c.ismove){c.style.left=(ax+aw)
+"px";c.style.top=(ay+ah)+"px";}x2("qmactive",o,
1);if(window.qmad&&qmad.bvis)eval(qmad.bvis);c.style.visibility="inherit";qm_li=c;}else
if(!qm_a(b[qp]))qm_li=b[qp];else qm_li=null;qm_kille(e);};function
qm_gcs(obj,sname,jname){var
v;if(document.defaultView&&document.defaultView.getComputedStyle)v=document.defaultView.getComputedStyle(obj,null).getPropertyValue(sname);else
if(obj.currentStyle)v=obj.currentStyle[jname];if(v&&!
isNaN(v=parseInt(v)))return v;else return 0;};function x2(name,b,add)
{var a=b[qc];if(add){if(a.indexOf(name)==-1)b[qc]+=(a?' ':'')
+name;}else {b[qc]=a.replace("
"+name,"");b[qc]=b[qc].replace(name,"");}};function qm_kille(e){if(!
e)e=event;e.cancelBubble=true;if(e.stopPropagation&&!
(qm_s&&e.type=="click"))e.stopPropagation();}/* ]]> */</script>

I wonder what program creates such unreadable code. Well, anyway, a
javascript error pops-up somewhere in that code after I run my script
on the files.

My idea is that the script encounters a unicode character and doesn't
know how to act with it and changes it to something else which mess up
the whole thing.

Do you people thing this sound like a good explanation. If it's likely
to be the problem, is having my strings u"""bla bla bla""" would fix
that?

Thanks in advance



From mail at gedankenkonstrukt.de  Thu Aug 23 13:35:46 2007
From: mail at gedankenkonstrukt.de (Thomas Wittek)
Date: Thu, 23 Aug 2007 19:35:46 +0200
Subject: Simple Python Spider
In-Reply-To: <mailman.171.1187875811.32294.python-list@python.org>
References: <mailman.171.1187875811.32294.python-list@python.org>
Message-ID: <fakghh$i0n$1@newsreader2.netcologne.de>

luca bertini schrieb:
> 1) ask google a query

http://code.google.com/apis/
http://code.google.com/apis/ajaxsearch/
But you probably have to reverse engineer the JavaScript lib.

> 2) parse the data

http://blog.hill-street.net/?p=7

-- 
Thomas Wittek
Web: http://gedankenkonstrukt.de/
Jabber: streawkceur at jabber.i-pobox.net
GPG: 0xF534E231


From malaclypse2 at gmail.com  Tue Aug  7 11:47:44 2007
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Tue, 7 Aug 2007 11:47:44 -0400
Subject: parsing a dbIII file
In-Reply-To: <1186469710.277542.246430@w3g2000hsg.googlegroups.com>
References: <1186469710.277542.246430@w3g2000hsg.googlegroups.com>
Message-ID: <16651e80708070847i638094ffp97473b1f8112b6fd@mail.gmail.com>

On 8/7/07, korovev76 at gmail.com <korovev76 at gmail.com> wrote:
> I have to parse a file (that is a dbIII file) whose stucture look like
> this:
> |string|, |string|, |string that may contain commas inside|, 1, 2, 3, |
> other string|

The CSV module is probably the easiest way to go:

>>> data = "|string|, |string|, |string that may contain commas
inside|, 1, 2, 3, |other string|"
>>> import csv
>>> reader = csv.reader([data], quotechar="|", skipinitialspace=True)
>>> for row in reader:
	print row

['string', 'string', 'string that may contain commas inside', '1',
'2', '3', 'other string']

-- 
Jerry


From zentraders at gmail.com  Thu Aug 30 18:41:25 2007
From: zentraders at gmail.com (Zentrader)
Date: Thu, 30 Aug 2007 15:41:25 -0700
Subject: Python weather application
In-Reply-To: <1188503143.724438.309580@x40g2000prg.googlegroups.com>
References: <1188503143.724438.309580@x40g2000prg.googlegroups.com>
Message-ID: <1188513685.528316.4770@l22g2000prc.googlegroups.com>

On Aug 30, 12:45 pm, seancron <seanc... at gmail.com> wrote:
> Does anybody have any suggestions for getting started on desigining a
> desktop weather application in Python?
>
> I've been looking for access to weather data and while I have found
> several including the weather.com service I've decided to use the
> Yahoo! Rss Weather feed since it doesn't have a license like the
> weather.com service does. However one problem I have with it is that
> it only accepts zip codes or locations ids.  So if a user was to enter
> the name of the city instead of those two there would be an error. I
> could make it so they could only enter in the location code or zip
> code but I would really prefer to have it be automatically corrected.
> Does anyone have ideas on how to go about this or have an other
> suggestions?
>
> Thanks,
> Sean

Use a dictionary to convert from the city chosen to the zip/location
code to use at Yahoo.



From kyosohma at gmail.com  Mon Aug  6 11:26:03 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 06 Aug 2007 15:26:03 -0000
Subject: computer, printer, and another
In-Reply-To: <1186413714.616729.198620@x35g2000prf.googlegroups.com>
References: <1186413714.616729.198620@x35g2000prf.googlegroups.com>
Message-ID: <1186413963.282575.310550@m37g2000prh.googlegroups.com>

On Aug 6, 10:21 am, angga_cute <erlangga.kus... at gmail.com> wrote:
> Hi guys....
> I have some information for you...
> I would like you to invite to visiting my web, may be you need some
> information about newest information about computer, laptop, and than
> printer. I have little bit information on my webhttp://www.komputer-djogja.blogspot.com/
> I hope my web can give you alot of information...
> Thanks for you attention...

Why would people from a mostly English speaking background go to a
blog in poorly written English when they have so many other great
sites for this type of thing, like:

http://www.hardocp.com/
http://www.lockergnome.com/nexus/lockergnome/
www.cnet.com

And thousands of others?

Mike



From kyosohma at gmail.com  Fri Aug 17 14:15:15 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 17 Aug 2007 11:15:15 -0700
Subject: Python and Tkinter Programming--Expensive!
In-Reply-To: <Xllxi.9066$3x.1781@newssvr25.news.prodigy.net>
References: <Xllxi.9066$3x.1781@newssvr25.news.prodigy.net>
Message-ID: <1187374515.731463.243040@l22g2000prc.googlegroups.com>

On Aug 17, 12:59 pm, "W. Watson" <wolf_tra... at invalid.com> wrote:
> Why is the book in Subject (author is Grayson) so expensive? $100 on Amazon
> and $195 on ABE. Aren't there alternatives?
> --
>                           Wayne Watson (Nevada City, CA)
>
>                         Web Page: <speckledwithStars.net>


Probably because it is out of print, and thus, hard-to-find. I got my
copy last year and it definitely didn't cost that much then.

Mike



From simon at brunningonline.net  Fri Aug 24 12:54:56 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 24 Aug 2007 17:54:56 +0100
Subject: Regular expression use
In-Reply-To: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
Message-ID: <8c7f10c60708240954h5af2e55bq823ec167e4247e2e@mail.gmail.com>

On 24 Aug 2007 10:58:46 GMT, Nick Maclaren <nmm1 at cus.cam.ac.uk> wrote:
>
> For reasons that I won't explain, as they are too complicated
> and not terribly relevant, I am interested in discovering what
> people actually use regular expressions for.

http://xkcd.com/208/

-- 
Cheers,
Simon B.
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/
GTalk: simon.brunning | MSN: small_values | Yahoo: smallvalues


From jzgoda at o2.usun.pl  Wed Aug 22 16:00:44 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Wed, 22 Aug 2007 22:00:44 +0200
Subject: MsiLib
In-Reply-To: <mailman.134.1187812732.32294.python-list@python.org>
References: <mailman.134.1187812732.32294.python-list@python.org>
Message-ID: <fai4uu$dve$1@nemesis.news.tpi.pl>

Charlie napisa?(a):

> Thanks for the help. That definitely gets me on the right track. I am
> having an issue though. I keep getting the error that MSIDBOPEN_READONLY
> is not defined.
> 
> Here is my code for testing. Am I missing something really obvious or is
> something just not working that should and my system is screwed up
> somewhere? Thanks.
> 
> import msilib
> 
> c = msilib.OpenDatabase('test.msi', MSIDBOPEN_READONLY)

I think this should read msilib.MSIDBOPEN_READONLY.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From abli at freemail.hu  Mon Aug 27 14:59:25 2007
From: abli at freemail.hu (Abel Daniel)
Date: Mon, 27 Aug 2007 11:59:25 -0700
Subject: an eval()-like exec()
Message-ID: <1188241165.418263.165730@k79g2000hse.googlegroups.com>

Hi!

A python interactive interpreter works by having the user type in some
code, compiling and running that code, then printing the results. For
printing, the results are turned into strings.

I would like make an interpreter which does this, without the last
part: i.e. where the results are returned as objects, instead of as
strings. I.e. have I would like to see something that behaves like
this:

>>> ip = MyInterpreter()
# this started a new interpreter
>>> ip.run("import math") is None
True
>>> ip.run("math.pi") is math.pi
True

Neither exec() or eval() is usable for this, as far as I see, because
eval can't handle arbitrary python code (eval("import math") ), and
exec() doesn't return the results.

Subclassing an code.InteractiveInterpreter or code.InteractiveConsole
seems like a usable idea, but I couldn't find out what to do to get
the results before they are turned into strings.

Using compile() and then eval() didn't seem usable either.

Any ideas?

Thanks in advance,
Daniel Abel



From pyth0nc0d3r at gmail.com  Fri Aug 31 16:58:24 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Fri, 31 Aug 2007 15:58:24 -0500
Subject: How does super() work?
Message-ID: <eb79828c0708311358v388dc622qf781fe6651a7129e@mail.gmail.com>

I've searched Google, and other search engines to try to find out how
super() works.  Can someone explain in short detail how super() works?  I
may and may not need to know this information, but it is good to know.
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From kyosohma at gmail.com  Tue Aug 28 09:37:11 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 28 Aug 2007 06:37:11 -0700
Subject: Getting subprocesses to be hidden on Windows
In-Reply-To: <1188292102.065625.82670@22g2000hsm.googlegroups.com>
References: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
	<1188250115.875160.276780@r29g2000hsg.googlegroups.com>
	<1188292102.065625.82670@22g2000hsm.googlegroups.com>
Message-ID: <1188308231.196513.291260@19g2000hsx.googlegroups.com>

On Aug 28, 4:08 am, geoffbache <geoff.ba... at pobox.com> wrote:
> On Aug 27, 11:28 pm, kyoso... at gmail.com wrote:
>
>
>
> > On Aug 27, 3:21 pm, geoffbache <geoff.ba... at pobox.com> wrote:
>
> > > Hi,
>
> > > As part of my efforts to write a test tool that copes with GUIs
> > > nicely, I'm trying to establish how I can start a GUI process on
> > > Windows that will not bring up the window. So I try to hide the window
> > > as follows:
>
> > > info = subprocess.STARTUPINFO()
> > > info.dwFlags |= subprocess.STARTF_USESHOWWINDOW
> > > info.wShowWindow = subprocess.SW_HIDE
>
> > > proc = subprocess.Popen(..., startupinfo=info)
>
> > > This works, in a way, but doesn't work recursively. I.e. if the
> > > started process itself starts a window, that second window will not be
> > > hidden. This even applies to dialog boxes within the application. So
> > > instead of a lot of windows popping up I now get a lot of disembodied
> > > dialogs appearing, which is a slight improvement but not much.
>
> > > Also, certain processes (e.g. tkdiff) seem to ignore the directive to
> > > be hidden altogether.
>
> > > This is dead easy on UNIX with virtual displays like Xvfb. Can someone
> > > shed any light if it's possible on Windows from python?
>
> > > Regards,
> > > Geoff Bache
>
> > I'm confused. Why would you create a GUI if you're not going to
> > actually display it? Isn't that the point of a GUI? Or are you talking
> > about the command window popping up?
>
> > Mike
>
> Only in the context of testing it. If I run lots of GUI tests on my
> computer I want
> the tested GUIs to remain hidden so I can still use my computer in the
> meantime...
>
> Though if you can tell me how to stop the command window popping up on
> Windows
> I'll be grateful for that too (though it wasn't the original
> question).
>
> Geoff

Which GUI toolkit are you using? Tkinter, wxPython, pyQt? As for
losing the command window on Windows, the best way that I know of is
to just change the extension of the python file itself from *.py to
*.pyw . I'm pretty sure you can suppress command windows if you're
calling them from the command line using a flag, but I can't recall
the flag off the top of my head.

One way to test while still being able to use your computer is to
install a virtual machine with VMWare or some similar product. I use
VMWare's free software for testing some of my scripts, but I've heard
that Microsoft's got a free virtual product that isn't half bad.

Mike






From ptmcg at austin.rr.com  Sun Aug 19 17:37:32 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sun, 19 Aug 2007 14:37:32 -0700
Subject: Python on Computation, Math and Statistics
In-Reply-To: <DU0yi.1286$Oo.199@newssvr17.news.prodigy.net>
References: <m_%xi.34088$2v1.7394@newssvr14.news.prodigy.net>
	<5irgvaF3oi5dpU2@mid.uni-berlin.de>
	<DU0yi.1286$Oo.199@newssvr17.news.prodigy.net>
Message-ID: <1187559452.083196.221570@d55g2000hsg.googlegroups.com>

On Aug 19, 2:32 pm, "W. Watson" <wolf_tra... at invalid.com> wrote:
> Google? What's that? Thanks. I like to get a insider's view when I know
> experts are out there.

FYI the "insiders" and "experts" out there appreciate knowing that you
did a little work on your own before just posting questions. "I like
to get a insider's view when I know experts are out there" translates
to "My time is more valuable than other peoples', so I'll just ask
them to answer my questions instead of doing 5 minutes of digging for
myself."

Comments?  Here's mine: go away and come back after you've done some
homework.

-- Paul



From steve at holdenweb.com  Thu Aug 23 00:00:44 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 23 Aug 2007 00:00:44 -0400
Subject: Problems with dynamic function creation.
In-Reply-To: <fai0c6$rn5$03$1@news.t-online.com>
References: <mailman.126.1187805245.32294.python-list@python.org>
	<fai0c6$rn5$03$1@news.t-online.com>
Message-ID: <faj0pr$mov$1@sea.gmane.org>

Peter Otten wrote:
> Steven W. Orr wrote:
> 
> [snip mess]
> 
>> Everything works just fine (that I know of) except 
> 
> Sometimes you have to just fix the code you have. This however doesn't just
> smell funny, it's hopeless. Start with clearly stating your goals and then
> do a rewrite.
> 
> Should you need help again, remember post a self-contained example and an
> actual traceback.
> 
Just in case you don't find Peter's advice particularly constructive, 
please allow me to point out that he is doing you a favor. You will get 
much better advice if you ask this group how to achieve your real ands, 
rather than how to implement a possibly half-baked solution that you 
have already conceived.

In other words (in case an analogy will help), your position is a little 
like that of an amateur shipbuilder who has decided to make his first 
steel ship, and is trying to hold the hull plates together by banging 
nails through two overlapping plates into pieces of wood behind them.

So you are now asking "what kind of nails should I use to keep the hull 
from falling apart?" when you should be asking "what do I need to do to 
hold the hull together?". This latter question could be answered by some 
people who wanted to explain riveting technology to you, whereas others 
could try and show you that welding, while a little more difficult to 
achieve, gave a truly professional result. You could then take your pick 
of the most suitable solutions.

At the moment you appear to be the man with a hammer who is seeing all 
problems as nails.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From horpner at yahoo.com  Wed Aug  8 14:00:59 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 08 Aug 2007 18:00:59 GMT
Subject: Misleading wikipedia article on Python 3?
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
	<eICti.37400$G23.15165@newsreading01.news.tds.net>
	<41Dti.37401$G23.10727@newsreading01.news.tds.net>
	<1186582066.096793.14700@57g2000hsv.googlegroups.com>
Message-ID: <slrnfbk05n.20o.horpner@FIAD06.norwich.edu>

On 2007-08-08, Istvan Albert <istvan.albert at gmail.com> wrote:
> On Aug 6, 6:49 am, Neil Cerutti <horp... at yahoo.com> wrote:
>> Incidentally, from the second link I find it shocking that the
>> keyword parameter "file" shadows a builtin. It seems to
>> endorse a bad practice.
>
> I believe that the "file" builtin has been removed as well so
> it won't shadow anything.

I can't find any evidence of that in the PEPs. Do you have a
reference?

I thought, in fact, that open was on more shaky ground. ;)

-- 
Neil Cerutti


From david at nospam.spam  Thu Aug  9 21:51:39 2007
From: david at nospam.spam (david)
Date: Fri, 10 Aug 2007 11:51:39 +1000
Subject: wxPython before MainLoop
In-Reply-To: <13bl9a75laqcm70@corp.supernews.com>
References: <13bl9a75laqcm70@corp.supernews.com>
Message-ID: <13bnh5bs4b9h427@corp.supernews.com>

I'm disappointed that I didn't get a wxPython solution.

If the only way to get wxPython to correctly handle
this simple task is to code around it, I don't think
wxPython is really ready for Windows.

Is there a better place to ask?

Regarding the suggestions:

Bjoern, you're wrong. The GUI needs to be displayed
for the user to analyse. A delay between display and
readiness is much better than a delay before display
or a delay with the GUI half-drawn.

Mike, the screen does display correctly, it's just
that in Windows, screen updates are not processed
while the application is busy.

7Stud, that's a solution. Unless anyone comes up
with a direct solution, I guess I'll have to do that.

[david]


[david] wrote:
> I'd like to refresh the display before I start the main loop.
> 
> I have code like this:
> 
> app = App()
> app.Show()
> app.long_slow_init()
> app.MainLoop()
> 
> 
> The main frame partly loads at Show, but because the mainloop has not 
> started yet, the display does not update until long_slow_init() finishes.
> 
> Alternatively, I could code
> 
> app = App()
> app.long_slow_init()
> app.Show()
> app.MainLoop()
> 
> Which would give me a crisp Show, but there would be a long slow wait 
> before the app showed any activity at all. I would need a splash screen.
> 
> I'd rather not have a splash screen (and I don't know how anyway). I'd 
> like to just make app.Show() finish correctly before running 
> long_slow_init.
> 
> Is there a wx internal method that I can use to give Windows the 
> opportunity to finish painting the frame before I run long_slow_init()?
> 
> Or is there a better idea?
> 
> (david)


From anuroop.m at gmail.com  Mon Aug  6 06:43:58 2007
From: anuroop.m at gmail.com (kamu)
Date: Mon, 06 Aug 2007 03:43:58 -0700
Subject: pygtk how to get treeview row(name) from a popup menu
Message-ID: <1186397038.737727.22010@x40g2000prg.googlegroups.com>

hi all,
thanks in advance for your valuable reply.

I have a pygtk code. which is a simple tree view. and when i click on
any row of the tree view, i get a menu poped up. and i can click on
the options in the poped up menu. and it goes to a function. up to
this its fine with me. but now from this function, how do i get the
name of the tree row which i clicked. ?? I tried some get_path &
get_iter method and tried to pass it with the call. but i could not
get it. I pasted the test code which used. please correct me if i am
doin any mistake, though i am new to this language.
the code is pasted below.
in the function print_A(), i tried some things. ultimately i wanted to
get the name of the row in tree from this function. (ie: like 'CHILD 1
1'  or 'PARENT 2' )

any comments on these will be helpful to me. because i am very new to
pygtk

#------------------------
test.py------------------------------------------------------------------------------
#!/usr/bin/env python

# generic treeview

import pygtk
pygtk.require('2.0')
import gtk
import os

class test_tree:

   # close the window and quit
   def delete_event(self, widget, event, data=None):
       gtk.main_quit()
       return False

   def create_menu(self, window,event, data=None):
#       merge = gtk.UIManager()
#       self.set_data("ui-manager", merge)
#       accel = gtk.AccelGroup(merge)
       item_factory = gtk.ItemFactory(gtk.Menu, "<main>", None)
       item_factory.create_items(self.menu_items)
#       window.add_accel_group(accel)
       self.item_factory = item_factory

       return item_factory.get_widget("<main>")


   def button_press_callback(self, treeview, event, data=None):
       if event.button == 3:
           x = int(event.x)
           y = int(event.y)
           time = event.time
           pthinfo = self.treeview.get_path_at_pos(x,y)
        #   TreeSelection =
self.treeview.get_selection().get_treeview()
          # tre = gtk.TreeSelection.get_treeview()
         #  print "***"
          # print treeselection
          # print "***"
           if pthinfo is not None:
               path,col,cellx,celly = pthinfo
               self.treeview.grab_focus()
               self.treeview.set_cursor(path,col,0)
               menu = self.create_menu(self,self.window,None)
               menu.popup(None,None,None,event.button,event.time)

           return 1
   def print_A(self, w, data):
       iter =
self.menu_items.iter_children(self.menu_items.get_iter(self.menu_path))
       #iter = self.treeview.get_path()
       #aa = self.treestore.get_path(iter)
       print iter

       return 1

   def print_B(self, w, data):
       print "B"
       return 1

   def print_C(self, w, data):
       print "C"
       return 1

   def print_D(self, w, data):
       print "D"
       return 1

   def print_E(self, w, data):
       print "E"
       return 1


   def __init__(self):
       self.menu_items = (
                 ( "/_A",     "<control>O", self.print_A, 0, None ),
                 ( "/_B",    "<control>I", self.print_B, 0, None ),
                 ( "/_C",    "<control>H", self.print_C, 0, None ),
                 ( "/_D",    "<control>F", self.print_D, 0, None ),
                 ( "/_E",    "<control>U", self.print_E, 0, None ),
               )

       # Create a new window
       self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)

       self.window.set_title("Project")

       self.window.set_size_request(200, 200)

       self.window.connect("delete_event", self.delete_event)

       # create a TreeStore with one string column to use as the model
       self.treestore = gtk.TreeStore(str)

       # add some data now - 4 rows with 2 child rows each
       for parent in range(4):
           piter = self.treestore.append(None, ['PARENT %i' %
parent])
           for child in range(1):
               self.treestore.append(piter, ['CHILD1 %i' % parent])
               self.treestore.append(piter, ['CHILD2 %i' % parent])

       # create the TreeView using treestore
       self.treeview = gtk.TreeView(self.treestore)

       self.treeview.connect ("button_press_event",
self.button_press_callback, None)
       iter = self.treestore.get_iter_first()

       # create the TreeViewColumn to display the data
       self.tvcolumn = gtk.TreeViewColumn('project')

       # add tvcolumn to treeview
       self.treeview.append_column(self.tvcolumn)

       # create a CellRendererText to render the data
       self.cell = gtk.CellRendererText()

       # add the cell to the tvcolumn and allow it to expand
       self.tvcolumn.pack_start(self.cell, True)

       # set the cell "text" attribute to column 0 - retrieve text
       # from that column in treestore
       self.tvcolumn.add_attribute(self.cell, 'text', 0)

       # make it searchable
       self.treeview.set_search_column(0)

       # Allow sorting on the column
       self.tvcolumn.set_sort_column_id(0)

       # Allow drag and drop reordering of rows
       self.treeview.set_reorderable(True)

       self.window.add(self.treeview)

       self.window.show_all()

def main():
   gtk.main()

if __name__ == "__main__":
   test_tree = test_tree()
   main()
#-------
end--------------------------------------------------------------------


-thanks a lot
-Anuroop



From jstroud at mbi.ucla.edu  Tue Aug 21 04:32:01 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 21 Aug 2007 08:32:01 GMT
Subject: Adjusting the names of custom exceptions (since raising strings
	is deprecated)
In-Reply-To: <1187672085.263963.157470@z24g2000prh.googlegroups.com>
References: <1187672085.263963.157470@z24g2000prh.googlegroups.com>
Message-ID: <5qxyi.18719$eY.12647@newssvr13.news.prodigy.net>

Silfheed wrote:
> Heyas
> 
> So this probably highlights my lack of understanding of how naming
> works in python, but I'm currently using FailUnlessRaises in a unit
> test and raising exceptions with a string exception.  It's working
> pretty well, except that I get the deprecation warning that raising a
> string exception is going to go away.  So my question is, how do I
> mangle the name of my exception class enough that it doesnt stick the
> name of the module before the name of the exception?
> 
> Namely I'd like to get the following
> 
> ***
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> MyError: 'oops!'
> 
> instead of
> 
> ***
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> __main__.MyError: 'oops!'
> 
> (or even test_thingie.MyError as is usually the case).
> 
> 
> Creating a class in a separate file and then doing
> 
> ***
> from module import MyError
> raise MyError
> 
> 
> still gives
> 
> ***
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> module.MyError
> 
> 
> Anyway, any help appreciated.
> 

Would it be cheating to use metaclasses?

# myModule.py
class ExampleType(type):
   def __repr__(cls):
     return cls.__name__

class ExampleError(Exception):
   __metaclass__ = ExampleType
   __name__ = 'ExampleError'
   def __repr__(self):
     return 'ExampleError'


py> import myModule
py> raise myMo
myModule      myModule.py   myModule.pyc  myModule.py~
py> raise myModule.Ex
myModule.ExampleError  myModule.ExampleType
py> raise myModule.ExampleError
------------------------------------------------------------
Traceback (most recent call last):
   File "<ipython console>", line 1, in <module>
ExampleError


James


From steveo at syslang.net  Sun Aug 26 07:55:39 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Sun, 26 Aug 2007 07:55:39 -0400 (EDT)
Subject: Need a better understanding on how MRO works?
In-Reply-To: <1i3f78x.1pxexgx6emjfhN%aleax@mac.com>
References: <mailman.295.1188079346.32294.python-list@python.org>
	<1i3evke.1rwf8pn10k1h30N%aleax@mac.com>
	<mailman.0.1188096859.28954.python-list@python.org>
	<1i3f78x.1pxexgx6emjfhN%aleax@mac.com>
Message-ID: <alpine.LFD.0.999.0708260746390.1739@saturn.syslang.net>

On Saturday, Aug 25th 2007 at 22:14 -0700, quoth Alex Martelli:

=>Steven W. Orr <steveo at syslang.net> wrote:

=>> * Also, I'd like to understand what the difference is between 
=>>     nclass = new.classobj(name,(D1,),globals())
=>> vs. 
=>>     def classfactory():
=>>       class somename(object):
=>>           def somestuff():
=>>               pass
=>>         return somename
=>>     G1 = classfactory()
=>>     globals()[name] = G1
=>> 
=>> Does new.classobj do anything special?
=>
=>No, new.classobj does essentially the same thing that Python does after
=>evaluating a class statement to prepare the class's name, bases and
=>dictionary: finds the metaclass and calls it with these arguments.
=>
=>A key difference of course is that a class statement prepares the class
=>dictionary as a new, ordinary, distinct dictionary, while new.classobj
=>accepts whatever dictionary you give it (so you can, though shouldn't,
=>do strange things such as pass globals()...:-).

In fact, I wanted to make a common routine that could be called from 
multiple modules. I have classes that need to be created from those 
multiple modules. I did run into trouble when I created a common routine 
even though I passed globals() as one of the args. The """though 
shouldn't""" is prompting me to ask why, and where I might be able to read 
more.

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From steve at REMOVE.THIS.cybersource.com.au  Thu Aug  2 08:51:14 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 02 Aug 2007 22:51:14 +1000
Subject: i am new to python-Please somebody help
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com>
Message-ID: <pan.2007.08.02.12.51.13.363293@REMOVE.THIS.cybersource.com.au>

On Thu, 02 Aug 2007 09:31:43 +0000, cool.vimalsmail wrote:
[snip]

You would be better off actually writing a sensible subject line instead
of grovelling. 

Subject: How to use gzip in Python? [beginner]

Then, having written a good subject line, it might have suggested a good
search string for Google: "gzip python"

http://www.google.com.au/search?&q=gzip+python

The first two links found will answer your question.


-- 
Steven.



From alextabone at gmail.com  Thu Aug  2 02:55:11 2007
From: alextabone at gmail.com (Acm)
Date: Wed, 01 Aug 2007 23:55:11 -0700
Subject: backup/restore postgresql database
Message-ID: <1186037711.895840.240250@g4g2000hsf.googlegroups.com>

I am working with Python 2.5 and Postgresql 8.2.4.

I would like to know how to perform the backup and restore operations
on postgresql through a python API (e.g. psycopg2).

Thank you.



From jdvolz at gmail.com  Wed Aug 22 13:58:16 2007
From: jdvolz at gmail.com (Josh Volz)
Date: Wed, 22 Aug 2007 10:58:16 -0700
Subject: Error with long running web spider
Message-ID: <1187805496.980676.271830@l22g2000prc.googlegroups.com>

Hi everyone:

I have a spider that is relatively long running (somewhere between
12-24 hours).  My problem is that I keep having an issue where the
program appears to freeze.  Once this freezing happens the activity of
the program drops to zero.  No exception is thrown or caught.  The
program simply stops doing anything.  It even stops printing out its
activity to stdout.  The program itself appears to run in about 14
megs of memory.  Basically, the program looks up pages on a particular
website, and then reads the HTML of those pages, parses it (lots of
long regular expressions are used), and saves the found information to
an object (which is later translated to SQL and the SQL is written to
a file).

I've actually had this same problem with several long running Python
programs.  Any ideas?

Thanks in advance.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Aug 25 01:13:34 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 25 Aug 2007 07:13:34 +0200
Subject: GUI and distrubution
References: <1187974418.175783.50860@i38g2000prf.googlegroups.com>
	<92ab7$46cf1f51$4275d90a$11544@FUSE.NET>
	<fanec2$nr$1@daisy.noc.ucla.edu>
Message-ID: <5j9s3uF3rr0ljU1@mid.individual.net>

James Stroud wrote:

> One of these days, someone needs to write a tutorial on
> distributing for the Big 3 (Linux, OSX, and Amiga--or was that
> last one supposed to be M$?).

I think the last one was Wintendo ;)

Regards,


Bj?rn

-- 
BOFH excuse #221:

The mainframe needs to rest.  It's getting old, you know.



From bignose+hates-spam at benfinney.id.au  Thu Aug 30 03:09:36 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 30 Aug 2007 17:09:36 +1000
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
Message-ID: <87hcmhebwv.fsf@benfinney.id.au>

zzbbaadd at aol.com writes:

> What's with the index() function of lists throwing an exception on not
> found?

It's letting you know that the item isn't in the list. There's no
sensible return value from an "index" function in that condition.

> Let's hope this is rectified in Python 3. If nothing else, add a
> function that doesn't throw an exception.

You can easily create one:

    def get_an_index_even_if_not_found(the_list, the_item):
        bogus_index_value = object()
        try:
            index = the_list.index(the_value)
        except ValueError:
            index = bogus_index_value
        return index

It's up to you to figure out what bogus_index_value you want to
use. The rest of us will continue to catch the exception where needed.

-- 
 \      "Reichel's Law: A body on vacation tends to remain on vacation |
  `\         unless acted upon by an outside force."  -- Carol Reichel |
_o__)                                                                  |
Ben Finney


From mecej4 at operamail.com  Fri Aug 31 10:32:20 2007
From: mecej4 at operamail.com (mecej4)
Date: Fri, 31 Aug 2007 09:32:20 -0500
Subject: Important Research Project
In-Reply-To: <13deppf942e6u45@corp.supernews.com>
References: <13ddcvm1bsu3s94@corp.supernews.com>
	<1188482087.098419.56490@k79g2000hse.googlegroups.com>
	<1188500139.411988.127100@q5g2000prf.googlegroups.com>
	<13deppf942e6u45@corp.supernews.com>
Message-ID: <46d82674$0$15411$4c368faf@roadrunner.com>

E.D.G. wrote:
> "dave_w" <dave.willmer at gmail.com> wrote in message
> news:1188500139.411988.127100 at q5g2000prf.googlegroups.com...
> 
> My main Perl program is presently about 3500 lines of code long and 160 KB
> in size. So I am not too anxious to translate it into another language.
> 
Apparently, having painted himself into a corner, our warrior wants a 
few expert roofers to slither up and extricate him.

One of the best experiences that a programmer can have is that of 
admitting that the lovingly nurtured brainchild is now terminally ill, 
and showing enough fortitude to make a fresh start.

> The problem I am having is largely with the mechanics of linking modules to
> the Perl compiler etc.  So I am looking for experts who can help with
> cookbook instructions, start with step 1, step 2, step 3 etc.

Experts saintly enough to salvage the possibly hopeless would some idea 
of whether they are being asked to donate their time to work on a 
fundamentally flawed design.

> With trying to find a chart program to use for example, there appear to be a
> number of them.  But from examining their instructions it looks like most of
> them must also be linked to a third program called Gnuplot.  And that
> increases the complexity of getting something running.
> 

Since Perl, as also most other general purpose languages, has no 
plotting primitives or intrinsics,
you will have to use _some_ graphics protocol -- there is no escaping that.

Gnuplot is by no means the only choice, but it is simple and provides
a wide selection of output devices. Your Perl program can write the plot 
script to a
file, and call Gnuplot to run that script.

-- mecej4


From dfabrizio51 at gmail.com  Fri Aug 17 13:52:35 2007
From: dfabrizio51 at gmail.com (chewie54)
Date: Fri, 17 Aug 2007 17:52:35 -0000
Subject: best GUI library for vector drawing program
In-Reply-To: <1187366824.140017.285150@z24g2000prh.googlegroups.com>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
	<1187366824.140017.285150@z24g2000prh.googlegroups.com>
Message-ID: <1187373155.876788.25610@e9g2000prf.googlegroups.com>

On Aug 17, 12:07 pm, chewie54 <dfabrizi... at gmail.com> wrote:
> On Aug 17, 9:27 am, chewie54 <dfabrizi... at gmail.com> wrote:
>
> > Hello,
>
> > What would be the best cross-platform GUI library to use for a vector
> > based CAD program ( something like Visio on Windows )   WxWidgets,
> > Tk,   PyQt,  Java Swing,  Java SWT,????   I need the capibility to
> > draw and edit in a window that looks like a page of paper so WYSIWYG
> > is very important,  and I need to save the drawings in vector based
> > file formats like PS, EPS,  SVG, as well as image formats like jpg,
> > png, and gif.  Also, the images need to be high resolution so that
> > they can be pasted into various other programs in Windows OS,  and
> > Linux OS,  and the Mac OS.
>
> > Thanks in advance,
> > Dan
>
> Also,  I forgot to mention that it must have scripting capabilities so
> and I would like to embed a Tcl or Python interpreter.

I should have also mentioned that is for a commercial application.
That
doesn't rule Qt or PyQt out,  but this is a startup company with very
little income so my first choice would be to use some GUI library
that
is free to use for commercial apps.


Thanks again,
Dan




From valpis at gmail.com  Mon Aug 27 23:59:03 2007
From: valpis at gmail.com (Johan)
Date: Tue, 28 Aug 2007 03:59:03 -0000
Subject: some problems with mod_python
In-Reply-To: <46d337a1$0$422$426a74cc@news.free.fr>
References: <1188245587.129794.258250@z24g2000prh.googlegroups.com>
	<46d337a1$0$422$426a74cc@news.free.fr>
Message-ID: <1188273543.964125.125960@r23g2000prd.googlegroups.com>

On Aug 24, 3:39 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:

> Your problem is with Apache configuration, not with mod_python. The
> AddHandler directive maps <dirpath>/*.py to your handler. So you have to
> call <anythinghere>.py to trigger the desired behaviour. If you want
> *any* url under <dirpath> to be handled by mptest, you need to use
> SetHandler, not AddHandler.

Yes, this is what I missed. Using SetHandler instead solved my
problem. Many thanks to the people on the list that pointed that out
for me. (and will use mod_python mailing list in the future as
suggested)

/johan



From coyote_x at artcom.pl  Wed Aug  1 09:44:47 2007
From: coyote_x at artcom.pl (Adam Kubica)
Date: Wed, 01 Aug 2007 15:44:47 +0200
Subject: Equivalent to gzinflate() function in PHP.
Message-ID: <pan.2007.08.01.13.44.47.273887@artcom.pl>

Hellou.

Anybody know about code that work equivalent to gzinflate()
function used in PHP?

I search via google but I don't found anything sensible :-(


From jstroud at mbi.ucla.edu  Thu Aug  2 21:20:44 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 02 Aug 2007 18:20:44 -0700
Subject: __call__ considered harmful or indispensable?
In-Reply-To: <mailman.1527.1186079415.22759.python-list@python.org>
References: <mailman.1527.1186079415.22759.python-list@python.org>
Message-ID: <f8tvtc$jh9$1@zinnia.noc.ucla.edu>

skip at pobox.com wrote:
> I don't personally use __call__ methods in my classes, but I have
> encountered it every now and then here at work in code written by other
> people.  The other day I replaced __call__ with a more obvious method name,
> so now instead of executing
> 
>     obj(foo, bar, baz)
> 
> the code in question is
> 
>     obj.execute(foo, bar, baz)
> 
> In this case there was a bug.  Depending on inputs, sometimes obj
> initialized to a class, sometimes an instance of that class.  (I fixed that
> too while I was at it.)  The problem was that the use of __call__ obscured
> the underlying bug by making the instance as well as the class callable.
> 
> In this particular case it was clearly unnecessary and just obfuscated the
> code.  I'm wondering, are there some general cases where __call__ methods of
> a user-defined class are simply indispensable?


Consider this boring tedium:

def enclose(a, b):
   def _f():
     return do_something_with(a, b)
   return _f


And this is unbearable to look at:

def enclose(a, b):
   return lambda: do_something_with(a,b)


Which is related to this catastrophe:

in_the_midst_of_something(lambda a=a, b=b: do_something_with(a,b))


And this is just plain annoying:

import functools
def enclose(a, b):
   return functools.partial(do_something_with, a, b)


But __call__ allows for this pleasing little decorator for one's library:

import functools
class enclosable(object):
   def __init__(self, func):
     self.func = func
   def __call__(self, *args, **kwargs):
     return functools.partial(self.func, *args, **kwargs)

For example:

@enclosable
def do_something_with(a, b):
   [etc]


James


-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From fiach.reid at gmail.com  Wed Aug  1 04:26:06 2007
From: fiach.reid at gmail.com (Dan Anos)
Date: Wed, 01 Aug 2007 01:26:06 -0700
Subject: Free SMS from Computer Worldwide
In-Reply-To: <1185851367.570284.215960@x35g2000prf.googlegroups.com>
References: <1185851367.570284.215960@x35g2000prf.googlegroups.com>
Message-ID: <1185956766.490352.118170@q75g2000hsh.googlegroups.com>

Hi Lowbowman,

     Interested in expanding your SMS website to other countries,
check out our affiliate scheme on FreebieSMS.co.uk.

     I cant see your email address on your website.

Fiach


On Jul 31, 4:09 am, lowboman <lillowboma... at yahoo.com> wrote:
> Hello there I invite you to check out my sitehttp://www.nocostsms.com
> you can sendfreesmstext messages from your computer to any mobile
> phone and receive replies in you email account, also check out cell
> phone forums out while your there




From researchbase at gmail.com  Thu Aug  2 14:16:11 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Thu, 2 Aug 2007 23:46:11 +0530
Subject: problems playing with dates from any month.
In-Reply-To: <f8t533$6n6$1@sea.gmane.org>
References: <f81479dd0708021031s208afc54y59780b19889d268b@mail.gmail.com>
	<f8t533$6n6$1@sea.gmane.org>
Message-ID: <f81479dd0708021116g693b9163v1c7c0daaa8bd403d@mail.gmail.com>

On 02/08/07, Ian Clark <iclark at mail.ewu.edu> wrote:

>
> http://docs.python.org/lib/node85.html
>
I looked there even before.
but could not figure out what the code did.
I know in that variable called s there was a string in a valid date format.
but when datetime.strptime was used, I did not understand the place
where a date object say d was created.
I would expect some thing like d = and the function.  but I did not fine that.
only reference was the datetime module and the documentation is not as good.
another question I am getting is that where is the list of all
formatting characters.  like for example Y is 4 digit year M is month
MM is month in 2 digits etc.
I am trying to locate a list of all these denoters.
can you provide me the place?


> Then it's just:
>
> if date_obj.day == 5:
>      print 'It's the fifth day of the month'
>
this was much better than the documentation, thanks,
regards,
Krishnakant.


From no.email.here at zombo.com  Wed Aug 29 17:00:19 2007
From: no.email.here at zombo.com (Moon)
Date: Wed, 29 Aug 2007 21:00:19 GMT
Subject: Short, crazy example: list-derived class, with __iadd__ <-
	nevermind, me == idiot
References: <XZkBi.24445$wN3.18068@bignews2.bellsouth.net>
Message-ID: <D7lBi.24452$wN3.6686@bignews2.bellsouth.net>

__iadd__ is supposed to /return/ something, most likely self. 

My bad. 

On Wed, 29 Aug 2007 20:49:59 +0000, Moon wrote:

> class Vec(list):
>     def __init__(self):
>         list.__init__(self, [0.0, 0.0])
> 
>     def __iadd__(self, other):
>         assert isinstance(other, Vec)
>         self[0] += other[0]
>         self[1] += other[1]
>         print "right now, v is: ", self, " as you'd expect"
> 
> 
> v = Vec()
> w = Vec()
> w[0] = 1.0
> w[1] = 2.0
> print "v starts:", v
> 
> print "(w is:", w, " which is fine)"
> 
> v += w
> 
> print "(w still is:", w
> 
> print "after iadd, v: ", v, " <-- becomes None! What the hey?"
> 
> 
> # - running it:
> 
> py> python badvec.py
> v starts: [0.0, 0.0]
> (w is: [1.0, 2.0]  which is fine)
> right now, v is:  [1.0, 2.0]
> (w still is: [1.0, 2.0]
> later, v is:  None  <-- becomes None! What the hey?
> 
> py> python -V
> Python 2.5.1
> 
> -- Any explanation from a guru?
> 
> Thanks much...



From bj_666 at gmx.net  Sun Aug 26 02:50:43 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 26 Aug 2007 06:50:43 GMT
Subject: How can I use python for file processing
References: <1188108311.154118.229610@50g2000hsm.googlegroups.com>
Message-ID: <5jcm63F3rgkhtU1@mid.uni-berlin.de>

On Sun, 26 Aug 2007 06:05:11 +0000, yinglcs at gmail.com wrote:

> I am trying to use python for file processing.
> Suppose I have a file like this:
> I want to build a Hashmap between the line "begin_QOS_statistics" and
> "end_QOS_statistics"
> and for each line I want to put the first text as the key of the hash
> table and the second text as the value.

Work through the tutorial, experiment a little in the interactive
interpreter and then just do it.  You need to `open()` the file, iterate
over its lines in a ``for``-loop, decide to when it is time to start
processing lines, and then `str.split()` the lines and put them into a
`dict()`.  This is a neat little project to start learning the language.

Ciao,
	Marc 'BlackJack' Rintsch


From stefan.behnel-n05pAM at web.de  Mon Aug 27 05:49:32 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 27 Aug 2007 11:49:32 +0200
Subject: ANN: SCF released GPL
In-Reply-To: <1i3h3ki.1poi7cm865i17N%aleax@mac.com>
References: <2qnAi.21495$eY.19028@newssvr13.news.prodigy.net>
	<1i3h3ki.1poi7cm865i17N%aleax@mac.com>
Message-ID: <46D29E2C.60703@web.de>

Alex Martelli wrote:
> hg <hg at nospam.org> wrote:
>    ...
>> I am looking for a free subversion server resource to put the code ...
>> if you know of any.
> 
> Check out code.google.com -- it has a hosting service for open source
> code, too, these days (and it IS subversion).

It's Google, though, so it requires people to register with Google to work on
the project. Might be a blocker for some contributors.

Stefan


From jstroud at mbi.ucla.edu  Fri Aug  3 20:59:00 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 03 Aug 2007 17:59:00 -0700
Subject: How to pass a reference to the current module
In-Reply-To: <f90im3$8ms$1@daisy.noc.ucla.edu>
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<f90im3$8ms$1@daisy.noc.ucla.edu>
Message-ID: <f90j0k$g0o$1@zinnia.noc.ucla.edu>

James Stroud wrote:
> James Stroud wrote:
> 
>> Basically, what I am trying to acomplish is to be able to do this in 
>> any arbitrary module or __main__:
>>
>>
>> funcname = determined_externally()
>> ModuleUser.do_something_with(AModule, funcname)
>>
>>
>> Ideally, it would be nice to leave out AModule if the functions were 
>> designed in the same namespace in which do_something_with is called.
> 
> 
> 
> Is this the preferred way?
> 
> 
> import sys
> def do_something_with(funcname, amodule=None):
>   if amodule is None:
>     function = sys._getframe(1).f_locals[funcname]
>   else:
>     function = getattr(amodule, funcname)
>   [etc.]
> 
> 
> James
> 

_.replace('locals', 'globals')

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From QJing.Li at gmail.com  Fri Aug 17 23:01:36 2007
From: QJing.Li at gmail.com (math2life)
Date: Sat, 18 Aug 2007 03:01:36 -0000
Subject: python video editing libs
In-Reply-To: <46c64393$1@news.orcon.net.nz>
References: <46c64393$1@news.orcon.net.nz>
Message-ID: <1187406096.013266.199030@m37g2000prh.googlegroups.com>

On Aug 17, 5:55 pm, DavidM <nos... at nowhere.com> wrote:
> Hi,
>
> Does anyone know of any python or python-wrapped libs for video editing?
>
> My requirements:
>  - open video files in any of the popular containers (avi, mov, ogg, flv
>    etc) and all the popular codecs (mpeg3, theora, mpeg2 etc) and audio
>    codecs (raw, wav, mp3 etc)
>  - get an abstract video clip object on opening such a file
>  - query the clip object to determine stuff like length, framerate, size
>    etc
>  - iterate through all the frames, and get a frame object with each frame
>  - with a frame object, be able to access individual pixels, add graphic
>    images (eg, via PIL), export frame to graphics file (eg jpeg)
>  - with video clip object, be able to change framerate, insert/remove
>    frames etc, and render out with desired a-v codecs and container
>  - good well-documented API, preferably some usage examples
>
> Does anything like this exist?
>
> Cheers
> David

Python OpenCV wrapper will meet  most of your need, but I am not
sure ,
plz check it out.



From zargar26045 at gmail.com  Thu Aug  9 19:56:29 2007
From: zargar26045 at gmail.com (tomy)
Date: Thu, 09 Aug 2007 16:56:29 -0700
Subject: Smoother Lines in Turtle Graphics
Message-ID: <1186703789.695265.52390@e9g2000prf.googlegroups.com>

Hi All
I am a newbie to turtle graphics in python, so sorry if you find this
question too easy.
How can I get smoother lines in turtle graphics?
I am using python on windows.

Thanks in advance



From joshua at eeinternet.com  Wed Aug  1 18:02:49 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 01 Aug 2007 14:02:49 -0800
Subject: Bug in Time module, or in my understanding?
Message-ID: <f8qvua$pa5$1@sea.gmane.org>

I am getting results like these with the time module:

>>> import time
>>> int(time.mktime(time.strptime('2007-03-11 02:00:00', '%Y-%m-%d %H:%M
%S')))
1173610800
>>> int(time.mktime(time.strptime('2007-03-11 03:00:00', '%Y-%m-%d %H:%M
%S')))
1173610800
>>> time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(1173610800))
'2007-03-11 03:00:00'

I know it probably has something to do with daylight savings, but how can I
get back out that which I put in?  The times concerned are all standard
time, so how can I keep the time module from asserting its belief that I
want to convert to daylight savings?

Incidentally, it only happens with times on 2007-03-11  from 02:00:00 to
02:59:59, and not with time data from past years.

Thanks for any pointers!

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From zentraders at gmail.com  Mon Aug 27 23:55:06 2007
From: zentraders at gmail.com (Zentrader)
Date: Mon, 27 Aug 2007 20:55:06 -0700
Subject: include folder
In-Reply-To: <mailman.43.1188251054.28954.python-list@python.org>
References: <mailman.43.1188251054.28954.python-list@python.org>
Message-ID: <1188273306.034430.262960@x35g2000prf.googlegroups.com>

> My Linux version is: Debian GNU-Linux
> My Python version is: 2.3

Reinstalling Python would be my first option.  Any of the versions can
be downloaded from python.org but on debian you should be able to just
use apt-get or one of the GUIs for apt-get.



From steve at holdenweb.com  Thu Aug  9 10:52:14 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Aug 2007 10:52:14 -0400
Subject: Issues of state
In-Reply-To: <5uhro4-st8.ln1@lairds.us>
References: <op.tv98rva4wepdt4@ericb.pragmadev>	<7x8x8mpn37.fsf@ruckus.brouhaha.com>
	<hblpo4-mgj.ln1@lairds.us>	<7xfy2t8l5n.fsf@ruckus.brouhaha.com>
	<5uhro4-st8.ln1@lairds.us>
Message-ID: <f9f9mr$cch$1@sea.gmane.org>

Cameron Laird wrote:
> In article <7xfy2t8l5n.fsf at ruckus.brouhaha.com>,
> Paul Rubin  <http://phr.cx at NOSPAM.invalid> wrote:
>> claird at lairds.us (Cameron Laird) writes:
>>> Others have answered this at other levels.  In elementary terms,
>>> there truly is a difference, Paul, and one that's widely reified:
>>> a "desktop client-server" application typically listens through
>>> one socket, which therefore constitutes an index of the connection
>>> or client, while a Web application communicates through a sequence
>>> of independent HTTP transactions.  The latter can manage state only
>>> to the extent it passes session information around.
>> Is this significant?  In the case of a single user http app running on
>> the same computer as the browser, the server should only listen on
>> 127.0.0.1.  Every http hit then almost certainly comes from the same
>> session.  If there's doubt, the app can always set a random cookie at
>> the initial screen and check that the cookie never changes.
>>
>> If there's only a small amount of session state (say up to a few
>> hundred bytes) you can put it entirely into browser cookies and send
>> it on every single http hit.
> 
> I'm not sure what we're discussing.  Yes, I agree those are 
> mechanisms by which Web applications manage state.  Apparently
> we agree that, in a general Web application, state management,
> or related persistence, requires *some* mechanism or assumption.

As far as I'm concerned the major issue with trying to have "desktop web 
apps" compete with true windowed applications is the difficulty of 
maintaining sensible interactions with the interface. AJAX designs have 
increased the interaction level at the expense of greater complexity - 
there is more state to be transferred, and a much higher interaction 
rate with the server. But the browser is a terrible front-end for AJAX 
designs because it doesn't record the state changes that take place as a 
result of requests for updated InnerHTML content, so if the user is 
unwise enough to press the "back" button she loses all traces of the 
non-page interactions that have taken place since the page was loaded.

So "desktop web apps" should ensure that they get displayed in browser 
windows with minimal user interface decoration. But even then there's 
always that chance that sophisticated users will use keyboard shortcuts 
like ALT-left-arrow.

That, in summary, is why my 2004 PyCon paper[1] was subtitled "The Back 
Button is Not Your Friend".

regards
  Steve

[1]: http://www.python.org/pycon/dc2004/papers/18/Setting_A_Context.pdf
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From nmin at freenet.de  Tue Aug 14 05:52:50 2007
From: nmin at freenet.de (nmin at freenet.de)
Date: Tue, 14 Aug 2007 02:52:50 -0700
Subject: Jython - variables are stored somehow
In-Reply-To: <5i0i43F3kuhitU2@mid.uni-berlin.de>
References: <1186662600.413645.25430@22g2000hsm.googlegroups.com>
	<5i0i43F3kuhitU2@mid.uni-berlin.de>
Message-ID: <1187085170.059015.289080@q75g2000hsh.googlegroups.com>

works perfect ... thanks a lot!



From mcbrides9 at comcast.net  Sun Aug  5 21:58:56 2007
From: mcbrides9 at comcast.net (Jerry McBride)
Date: Sun, 05 Aug 2007 21:58:56 -0400
Subject: Tkinter or wxpython?
References: <mailman.1550.1186099225.22759.python-list@python.org>
Message-ID: <krbio4xhal.ln2@supertux.my.domain>

wang frank wrote:

> 
> Hi,
> 
> I want to build a GUI to execut python script. I found TKinter and
> wxpython. Which one is easier for a newbie? and which one is better?
> 

Tkiner is much easier to work with, but doesn't have the fine controls that
wx offers...



-- 


Jerry McBride


From valpis at gmail.com  Mon Aug 27 16:13:07 2007
From: valpis at gmail.com (Johan)
Date: Mon, 27 Aug 2007 20:13:07 -0000
Subject: some problems with mod_python
Message-ID: <1188245587.129794.258250@z24g2000prh.googlegroups.com>

Hi

I have installed and tested this on centos, fedora and freebsd all
give the same problem so I guess I missed some steps.

I have compiled bot apache (2.2.4) and mod_python (3.3.1) according to
the docs and no problem with this.
But when I have made everything about testing mod_python an browse to
http://server/test and there expecting to see "Hello world" I instead
get an index of contents in this directory. If I go to  http://server/test/mptest.py
it works. No errors in any log either.

What Have I missed?

This I added to httpd.conf
<Directory /opt/site/htdocs/test>
        AllowOverride All
        AddHandler mod_python .py
        PythonHandler mptest
        PythonDebug On
</Directory>


this is my mptest.py:
from mod_python import apache

def handler(req):
        req.content_type = 'text/plain'
        req.write("Hello World!")
        return apache.OK

/johan



From gagsl-py2 at yahoo.com.ar  Tue Aug 21 11:28:42 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 21 Aug 2007 08:28:42 -0700
Subject: Trouble with CGI code from Code Example 7.3 of the "Python
	Interactive CGI Tutorial"
In-Reply-To: <1187705685.007927.55030@z24g2000prh.googlegroups.com>
References: <1187705685.007927.55030@z24g2000prh.googlegroups.com>
Message-ID: <1187710122.354087.158910@o80g2000hse.googlegroups.com>

On 21 ago, 11:14, epsilon <cesm... at gmail.com> wrote:

> I'm having trouble with this script from a CGI lesson I'm working and
> I can't seem to figure it out.  I was wondering if someone could tell
> me what is wrong.  I've spent several hours trying to debug, but no
> success.  Any help would be appreciated.

Next time try to post the exact error message you get - working
crystall balls are hard to find nowadays :)
Ok, it's a syntax error, perhaps you didn't get a useful response from
the server.
The error is here:

>         if (session_key == 0):
>             session_key = create_session(id)
>             print id, , you are logged in with key:", session_key,

That should read:

            print id, "you are logged in with key:", session_key, "\n"

--
Gabriel Genellina



From digitalplusmail at gmail.com  Fri Aug 17 07:24:26 2007
From: digitalplusmail at gmail.com (Lepi Duja)
Date: Fri, 17 Aug 2007 04:24:26 -0700
Subject: Guitars, tabs, amps and more
Message-ID: <1187349866.702024.242830@r29g2000hsg.googlegroups.com>

Reviews of latest models of best guitars, fender, gibson, yamaha, and
many more, with pictures and prices.

http://pro-guitars.blogspot.com/


And if you want to win a free guitar go here

http://freeguitars.blogspot.com/



From simohayha.bobo at gmail.com  Mon Aug 13 21:55:21 2007
From: simohayha.bobo at gmail.com (simohayha)
Date: Mon, 13 Aug 2007 18:55:21 -0700
Subject: check if var is dict
In-Reply-To: <46c0608a$0$427$426a34cc@news.free.fr>
References: <46C02BFA.10703@al.com.au>
	<mailman.1909.1187002258.22759.python-list@python.org>
	<46c0608a$0$427$426a34cc@news.free.fr>
Message-ID: <1187056521.495500.302810@i13g2000prf.googlegroups.com>

check String is

def isStringLike(anobj):
    try: anobj + ''
    except: return False
    else: return True



From mamrhein at users.sourceforge.net  Wed Aug 15 13:03:20 2007
From: mamrhein at users.sourceforge.net (Michael Amrhein)
Date: Wed, 15 Aug 2007 19:03:20 +0200
Subject: sub-classing the types in the builtin module datetime
In-Reply-To: <mailman.2016.1187193903.22759.python-list@python.org>
References: <mailman.2016.1187193903.22759.python-list@python.org>
Message-ID: <p7obp4-dim.ln1@mahlix.mahome.de>

Colin J. Williams wrote:
> I wish to sub-class (if that's the right word) datetime and to use a 
> different signature for the constructor.
> 
> The second part has gone smoothly, but it is difficult to access the 
> type's methods from the sub-class instance.
> 
What's difficult?
 >>> from datetime import datetime
 >>> class mydt(datetime): pass
...
 >>> dt=mydt(2007,8,15)
 >>> dt.day
15
 >>> dt.now()
mydt(2007, 8, 15, 18, 57, 58, 562000)

How did you overwrite the constuctor?
Are you sure your constructor really returns a subclass of datetime?

> I'm beginning to wonder whether it might might be simpler to write my 
> own Date class.
> 
If you only want to change the signature of the constuctor, just write a 
factory function.

> Does anyone have any comments please?
> 
> Colin W.
> 

Have fun,
Michael


From orsenthil at users.sourceforge.net  Sat Aug  4 10:26:46 2007
From: orsenthil at users.sourceforge.net (O.R.Senthil Kumaran)
Date: Sat, 4 Aug 2007 19:56:46 +0530
Subject: the one python book
In-Reply-To: <1186235623.585135.42630@l70g2000hse.googlegroups.com>
References: <mailman.1611.1186233912.22759.python-list@python.org>
	<1186235623.585135.42630@l70g2000hse.googlegroups.com>
Message-ID: <20070804142645.GA3462@gmail.com>

> > newbie question:
> >
> > Is there a 'K&R" type of Python book? The book that you'd better have on

Official Python Tutorial and all Library reference document is somewhat
similar to K&R for C. You cannot expect the same kind of book, although a
variety of good books are available in Python.

Depending on your level there are lot of good books available in Python.
Go to www.python.org Beginners Tutorials and take up any of the Book for
Programmers and Non Programmers list. 
Read more than one book and know for yourself as which one you will find it
useful.

Btw, do not miss to read Official Python Tutorial written by Guido. 

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From ricaraoz at gmail.com  Fri Aug 31 20:04:49 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Fri, 31 Aug 2007 21:04:49 -0300
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <slrnfdg413.1e8.horpner@FIAD06.norwich.edu>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>	<1188364909.397692.209170@q4g2000prc.googlegroups.com>	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>	<1188369928.755777.142690@i38g2000prf.googlegroups.com>	<46d75191$0$401$426a74cc@news.free.fr>	<1188518054.298017.90610@x35g2000prf.googlegroups.com>	<46d76595$0$4013$426a74cc@news.free.fr>	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>	<1188525647.003223.199620@q5g2000prf.googlegroups.com>	<mailman.181.1188527203.28954.python-list@python.org>
	<slrnfdg413.1e8.horpner@FIAD06.norwich.edu>
Message-ID: <46D8ACA1.8010603@bigfoot.com>

Neil Cerutti wrote:
> On 2007-08-31, Ricardo Ar?oz <ricaraoz at gmail.com> wrote:
>> Russ wrote:
>>> Yes, thanks for reminding me about that. With SPARK Ada, it is
>>> possible for some real (non-trivial) applications to formally
>>> (i.e., mathematically) *prove* correctness by static analysis.
>>> I doubt that is possible without "static declarative type-
>>> checking."
>>>
>>> SPARK Ada is for applications that really *must* be correct or
>>> people could die.
>> I've always wondered... Are the compilers (or interpreters),
>> which take these programs to machine code, also formally proven
>> correct? And the OS in which those programs operate, are they
>> also formally proven correct? And the hardware, microprocessor,
>> electric supply, etc. are they also 'proven correct'?
> 
> Who watches the watchmen? The contracts are composed by the
> programmers writing the code. Is it likely that the same person
> who wrote a buggy function will know the right contract?
> 

Actually my point was that if a program is to be trusted in a critical
situation (critical as in catastrophe if it goes wrong) then the OS, the
 compiler/interpreter etc should abide by the same rules. That is
obviously not possible, so there's not much case in making the time
investment necessary for correctness proof of a little program (or
usually a little function inside a program) when the possibilities for
failure are all around it and even in the code that will run that
function. And we should resort to other more sensible answers to the
safety problem.




From steven.bethard at gmail.com  Sun Aug 12 22:30:33 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 12 Aug 2007 20:30:33 -0600
Subject: A dumb question about a class
In-Reply-To: <mailman.1891.1186963290.22759.python-list@python.org>
References: <mailman.1887.1186955369.22759.python-list@python.org>	<TqSdnWYzVdWvGCLbnZ2dnUVZ_saknZ2d@comcast.com>	<mailman.1888.1186957809.22759.python-list@python.org>	<euCdnYM4sfSHFiLbnZ2dnUVZ_gadnZ2d@comcast.com>
	<mailman.1891.1186963290.22759.python-list@python.org>
Message-ID: <tvKdnY5tf7bSXyLbnZ2dnUVZ_rCtnZ2d@comcast.com>

Dick Moores wrote:
> At 03:35 PM 8/12/2007, Steven Bethard wrote:
>> Note that if you just want to iterate over all the primes, there's no
>> need for the class at all.  Simply write::
>>
>>      for prime in iter_primes():
> 
> Even if I want to test only 1 integer, or want the list of primes in a 
> certain interval, I don't need the class at all

Yep.  That was the basis of my original feeling that the recipe was 
kinda overkill.

> Thanks for your help. I didn't learn much about classes, but appreciated 
> your iter_primes() a lot!

You're welcome, though I can't actually take credit for iter_primes(). 
The original version is due to Tim Hochberg, in a comment on this recipe:

     http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/117119

FWIW, he says that he "managed to generate all primes up to 909,691 
before it bombed the Python interpreter mysteriously, but it takes a while!"

I'm not particularly married to that prime generator. For your purposes, 
any generator version of iter_primes() is probably more useful than the 
class you were looking at. You can see some other implementations of 
prime generators on that same recipe page.

STeVe


From http  Mon Aug  6 10:39:12 2007
From: http (Paul Rubin)
Date: 06 Aug 2007 07:39:12 -0700
Subject: Tkinter or wxpython?
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
Message-ID: <7xps204tin.fsf@ruckus.brouhaha.com>

kyosohma at gmail.com writes:
>  I've read that Tkinter doesn't scale well if you're writing complex
> GUIs. I haven't been able to test this hypothesis though. However,
> since I had to rewrite VBA apps into Python, to get the right "look
> and feel" I needed the widgets that wxPython provided. Since I started
> out with C++, I find wxPython better than Tkinter, but it's all pretty
> subjective. Try them both!

Tkinteger (dang, I always end up typing it that way, I won't even
bother fixing the error) is easy to use for simple gui's, and it's
part of the standard python distro which for me is a big advantage (no
extra crap to download).  However, the widget set is rather ugly and
doesn't blend in well with anyone's native widgets; the widget
selection itself is rather narrow, and I think kyosohma may be right
that it doesn't scale well to complex gui's.  I've looked at the code
for IDLE's gui and it's terrifying.

At this point I think nobody should write desktop gui apps without a
good reason.  There is a fairly flexible and easy to program gui
already running on almost every desktop, namely the web browser.
Before you write a gui using some client side toolkit, ask yourself
whether you can instead embed a web server in your application and
write an HTML gui.  That approach is not always the answer, but it has
considerable advantages when you can do it that way.


From bj_666 at gmx.net  Sat Aug 11 12:53:12 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 11 Aug 2007 16:53:12 GMT
Subject: Who told str() to round my int()'s!!!
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
Message-ID: <5i67roF3ml00gU4@mid.uni-berlin.de>

On Sat, 11 Aug 2007 16:40:02 +0000, Adam W. wrote:

> After a fair amount of troubleshooting of why my lists were coming
> back a handful of digits short, and the last digit rounded off, I
> determined the str() function was to blame:
> 
>>>> foonum
> 0.0071299720384678782
>>>> str(foonum)
> '0.00712997203847'
>>>>
> 
> Why in the world does str() have any business rounding my numbers, and
> how do I get around this?

If `str()` would not round you would get very long numbers because of the
inaccuracies of floating point values.  I know Python is lying when 0.1
prints as 0.1, but do you really want to see
0.10000000000000000555111512312578270211815834045410156250 instead?

Use string formatting to tell the number of digits you want to see:

In [16]: '%.56f' % 0.1
Out[16]: '0.10000000000000000555111512312578270211815834045410156250'

Ciao,
	Marc 'BlackJack' Rintsch


From ameyer2 at yahoo.com  Thu Aug 30 17:25:49 2007
From: ameyer2 at yahoo.com (Alan Meyer)
Date: Thu, 30 Aug 2007 14:25:49 -0700
Subject: Please assist- Python Consultant needed for 3-6 month project
In-Reply-To: <mailman.145.1188490140.28954.python-list@python.org>
References: <mailman.145.1188490140.28954.python-list@python.org>
Message-ID: <1188509149.181991.70400@x40g2000prg.googlegroups.com>

On Aug 30, 12:06 pm, "Kelley McNeillie"
<kmcneil... at softwarespecialists.com> wrote:

> ... We are looking for a python developer with  web-based
> application experience. ... I am finding this skill pretty much
> impossible to identify locally ...

Kelley,

I don't know if your client is willing to pay for a week or two
of non-productive time, but I think a good Perl programmer with
web development experience could pick up Python in a week, and a
good Java or C# programmer could pick it up in two weeks.

I've personally always believed that, when comparing a good
programmer with no specific experience in a particular language,
and an average programmer with lots of experience, the good
programmer will outperform the average one in any task lasting
more than a couple of months.

Of course I haven't always been able to convince managers of
that.

    Alan



From bulliver at badcomputer.org  Thu Aug 23 13:36:31 2007
From: bulliver at badcomputer.org (darren kirby)
Date: Thu, 23 Aug 2007 11:36:31 -0600
Subject: My 'time' module is broken, unsure of cause
In-Reply-To: <20070823173105.8162.615504421.divmod.quotient.1142@ohm>
References: <20070823173105.8162.615504421.divmod.quotient.1142@ohm>
Message-ID: <200708231136.31357.bulliver@badcomputer.org>

quoth the   Calderone:

>
>     exarkun at charm:~$ echo "print '40:42:0'" > time.py
>     exarkun at charm:~$ python
>     Python 2.4.3 (#2, Oct  6 2006, 07:52:30)
>     [GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2
>     Type "help", "copyright", "credits" or "license" for more information.
>
>     >>> import time
>
>     40:42:0
>
>     >>> time.time()
>
>     Traceback (most recent call last):
>       File "<stdin>", line 1, in ?
>     AttributeError: 'module' object has no attribute 'time'
>
>     >>> print time.__file__
>
>     time.py
>
>     >>> ^D
>
>     exarkun at charm:~$ rm time.py
>     exarkun at charm:~$ rm time.pyc
>     exarkun at charm:~$ python
>     Python 2.4.3 (#2, Oct  6 2006, 07:52:30)
>     [GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2
>     Type "help", "copyright", "credits" or "license" for more information.
>
>     >>> import time
>     >>> time.time()
>
>     1187890226.9293921
>
>     >>> print time.__file__
>
>     /usr/lib/python2.4/lib-dynload/time.so
>
>
> Jean-Paul

Ahh, so it was pebkac. Thanks Jean-Paul, I can be thick sometimes...

-d
-- 
darren kirby :: Part of the problem since 1976 :: http://badcomputer.org
"...the number of UNIX installations has grown to 10, with more expected..."
- Dennis Ritchie and Ken Thompson, June 1972


From hat at se-162.se.wtb.tue.nl  Wed Aug 15 08:43:30 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 15 Aug 2007 14:43:30 +0200
Subject: Who told str() to round my int()'s!!!
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
Message-ID: <slrnfc5t7i.vtl.hat@se-162.se.wtb.tue.nl>

On 2007-08-11, Adam W. <AWasilenko at gmail.com> wrote:
> After a fair amount of troubleshooting of why my lists were coming
> back a handful of digits short, and the last digit rounded off, I
> determined the str() function was to blame:
>
>>>> foonum
> 0.0071299720384678782
>>>> str(foonum)
> '0.00712997203847'
>>>>
>
> Why in the world does str() have any business rounding my numbers, and
> how do I get around this?

You have got a few good reactions already. What is not mentioned yet however is
the difference between str() and repr().


Python has two ways to stringify an object:

str() is intended to deliver a 'human-readable' representation of its argument,
and typically, humans think a few digits of a float is enough.

The repr() on the other hand is intended to deliver a 'machine-reproducible'
string representation of its argument, ie after "y = eval(repr(x))" y == x
should hold.

Note that no rounding occurs with the floating point number, arguments of both
str() and repr() are not changed.


So, depending on your intentions of str(foonum), you should either explicitly
format your floating point number yourself (ie if you want a more precise
human-readable representation of the number), or you should use repr() (if you
intend to use the string representation for reproducing the same object
elsewhere by a machine).


Albert


From rcdailey at gmail.com  Wed Aug  1 12:18:40 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Wed, 1 Aug 2007 11:18:40 -0500
Subject: Time object?
Message-ID: <496954360708010918n22e525f8y1f453714a7d1155c@mail.gmail.com>

Hi,

I'm well aware of the datetime module, however it is really inconsistent and
useless to me. In order to do any arithmetic on time objects, I have to use
the 'timedelta' class, which doesn't even allow me to do all the math I want
to do.

For example, I want to do "1 / timeobj", where timeobj might represent a
time in the format of "00:00:00.000000". Do I have to code my own class for
this, or is there some other third party library out there that will allow
me to do this?

Thanks.
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From gherron at islandtraining.com  Thu Aug  2 03:11:45 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 02 Aug 2007 00:11:45 -0700
Subject: a dict trick
In-Reply-To: <1186036331.304916.304020@e9g2000prf.googlegroups.com>
References: <1186036331.304916.304020@e9g2000prf.googlegroups.com>
Message-ID: <46B183B1.2000702@islandtraining.com>

james_027 wrote:
> hi
>
> for example I have this dictionary
>
> dict = {'name':'james', 'language':'english'}
>
> value = 'sex' in dict and dict['sex'] or 'unknown'
>
> is a right pythonic of doing this one? I am trying to get a value from
> the dict, but if the key doesn't exist I will provide one.
>
> THanks
> james
>
>   
This fails if 'sex' is in the dictionary and it's value happens to be 
any of the values that evaluate to a boolean False.  In that case you'll 
get 'unknow' even though the key is in the dictionary.

However, python dictionaries provide a way to do this:

  dict.get('sex', 'unknown')

looks up the value associated with the key if it exists, otherwise it 
returns the provided default value.

You may also want to checkout the dictionary method setdefault which has 
the functionality of get PLUS if the key is not found, it adds the 
key,value pair to the dictionary.

Gary Herron



From jura.grozni at gmail.com  Sun Aug 19 10:11:02 2007
From: jura.grozni at gmail.com (azrael)
Date: Sun, 19 Aug 2007 14:11:02 -0000
Subject: Hot subject: a good python editor and/or IDE?
In-Reply-To: <mailman.2166.1187530711.22759.python-list@python.org>
References: <mailman.2162.1187525764.22759.python-list@python.org>
	<5iqreuF3qanv6U1@mid.individual.net>
	<mailman.2166.1187530711.22759.python-list@python.org>
Message-ID: <1187532662.021177.54940@a39g2000hsc.googlegroups.com>

Try the WingIDE
Great Code Completition, Source Assistant, Debugger, PythonShell,
projects,.... The codeCompletition is really great.
Give it a try



On Aug 19, 3:37 pm, Buchoux S?bastien <seb.buch... at gmail.com> wrote:
> Bjoern Schliessmann wrote:
> > S?bastien wrote:
>
> >> I am currently using Eclipse+PyDev when developping Python
> >> projects but I lack a fast, simple editor for tiny bit of scripts.
> >> So here is my question: what is, for you, the current best ( but
> >> still kind of light! ) Python editor/IDE ?
>
> > vim
>
> > BTW, this is an FAQ. Please look through the archives for many
> > threads with many, many IDEs.
>
> > Regards,
>
> > Bj?rn
>
> Yeah, I know this is a FAQ, but, as you mention, there is a whole bunch
> of editors, every one of them being updated constantly (+ the new ones
> getting out). So I am quite sure that looking through the archives is
> THE solution since it will only reflect what people thought when
> question was asked. Just type "best Python editor" on Google and you
> will see that almost all hits are completely out of date.
> Fair enough though! ;)




From laurent.pointal at limsi.fr  Fri Aug  3 05:57:03 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 03 Aug 2007 11:57:03 +0200
Subject: (no) fast boolean evaluation ? missing  NOT
In-Reply-To: <eb4fb$46b2f7a6$d443bb3a$21643@news.speedlinq.nl>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<mailman.1545.1186095368.22759.python-list@python.org>
	<1186096979.397596.36640@e16g2000pri.googlegroups.com>
	<eb4fb$46b2f7a6$d443bb3a$21643@news.speedlinq.nl>
Message-ID: <f8uu5f$i3u$1@news2.u-psud.fr>

Stef Mientki a ?crit :
> <Python>
> def Some_Function (const):
>     print 'Ive been here', const
>     return True
> 
> A = True
> 
> if A and Some_Function (4 ):
>     print 'I knew it was True'
> else:
>     print 'I''ll never print this'
> </Python>
> 
> <Output>
> Ive been here 4
> I knew it was True
> </Output
> 
> I was expected that the function would not be called,
> because A is True.

When using the *and* operator, the short-circuit evaluation is done if A 
is False (no need to know the other operand, the result cannot be True). 
But if A is True, the compiler must evaluate the second parameter to 
know the expression result.

[note: for the or operator, the short circuit is done if first operand 
is True]

A+

Laurent.

PS. See http://en.wikipedia.org/wiki/Truth_table or google for boolean 
logic tables.


From Dominic at PLEASEASK.co.uk  Mon Aug 13 10:48:08 2007
From: Dominic at PLEASEASK.co.uk (special_dragonfly)
Date: Mon, 13 Aug 2007 15:48:08 +0100
Subject: Help with optimisation
Message-ID: <46c06b51$0$11684$7b0f0fd3@mistral.news.newnet.co.uk>

Hello,
I know this might be a little cheeky, and if it is, please say, but I need a 
little hand optimising some code. For the simple reason that this is 
'company' code and I have no idea what I'm allowed to release and not as the 
case may be I've changed anything that could give an indication of the 
company - if that makes any sense...

for the code below:
text_buffer is a single record from an XML stream. I can't read in the 
entire XML at once because it isn't all available straight away, so I 
capture line by line, and when a full message is available I use parseString 
under the minidom API.
The SQL version is SQLite. It was recommended to me, and is adequate for the 
uses I put it to.
The function doesn't return anything, but it's called often enough and 
depending on the optimisation I'll be able to use the same style in other 
areas of the program.

previous code:
def CreatePerson(text_buffer):
    dom=xml.dom.minidom.parseString(text_buffer)
    reflist = dom.getElementsByTagName('Country')
    Country = reflist[0].firstChild.nodeValue
    reflist = dom.getElementsByTagName('Age')
    Age = reflist[0].firstChild.nodeValue
    reflist = dom.getElementsByTagName('Surname')
    Surname = reflist[0].firstChild.nodeValue
    reflist = dom.getElementsByTagName('Forename')
    Forename = reflist[0].firstChild.nodeValue
    cursor.execute('INSERT INTO Person VALUES(?,?,?)', (Forename + "-" + 
Surname, Age, Country))
    connection.commit()

I've changed it now to this:
def CreatePerson(text_buffer):
    dom=xml.dom.minidom.parseString(text_buffer)
    elements=['Country','Age','Surname','Forename']
    Values=[]
    for element in elements:
        reflist=dom.getElementsByTagName(element)
        Values.append(reflist[0].firstChild.nodeValue)
        # I can get away with the above because I know the structure of the 
XML
    cursor.execute('INSERT INTO Person 
VALUES(?,?,?)',(Forename+"-"+Surname,Age,Country))
    connection.commit()

They both seem ugly IMO (read: longer than intuitively necessary), and so I 
was wondering whether there was any way to combine Forename and Surname 
together within the Values list (think merge cells with the '-' in between) 
so I could use the unary(?) operator within the SQL?

I suppose if this is a cheeky request then I won't get any replies.
Thank you for any help
Dominic





From jorgen.maillist at gmail.com  Wed Aug 15 05:28:18 2007
From: jorgen.maillist at gmail.com (Jorgen Bodde)
Date: Wed, 15 Aug 2007 11:28:18 +0200
Subject: moving files in a seperate thread (and/or with progress?)
Message-ID: <11e49df10708150228w77f9d27dlba5bac854532f4c6@mail.gmail.com>

Hi all,

I want to make a small batch copy tool that scans for certain files,
and copies them to a specified directory. Since the files are huge
(AVI / DIVX) typical 300 to 700 Mb, I want to provide the user with
some feedback during the file copy.

Here is my dillemma; When I use shutil.move(..,..) I have to wait
until it's done, there is no feedback, so the GUI basically hangs.
However, shutil.move can be fast because it intelligently renames the
file when it is on the same medium, but slow when it moves to a
different one.
When I use my own implementation of a move mechanism that provides
feedback, I lose that intelligence, and I might slow down the copy
process unneccessarily.

When I move files, feedback is handy to have, but not neccesary so I
thought I can also call shutil.move from a seperate thread so the main
GUI stays responsive. What are my options in aborting a move by
killing the thread or are there other (3rdparty) modules I might use
to get better move or copy performances?

Just opening the file, performing a block copy myself seems like it
will slow down the transfer, but up until now I found no way to move
or copy with progress or abilities to abort the file transfer..

Any ideas?

Regards,
- Jorgen


From zyzhu2000 at gmail.com  Sat Aug 25 20:13:30 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Sun, 26 Aug 2007 00:13:30 -0000
Subject: Joining Big Files
In-Reply-To: <1188035844.616831.205350@i38g2000prf.googlegroups.com>
References: <1188035844.616831.205350@i38g2000prf.googlegroups.com>
Message-ID: <1188087210.932470.302610@22g2000hsm.googlegroups.com>

On Aug 25, 4:57 am, mosscliffe <mcl.off... at googlemail.com> wrote:
> I have 4 text files each approx 50mb.
>
> I need to join these into one large text file.
>
> I only need to do this very occasionally, as the problem has occurred
> because of upload limitations.
>
> Bearing in mind filesize and memory useage, would I be better reading
> every line in every file and writing each line to the output file or
> is there someway I could execute some shell command.
>
> I am working on a hosted website with no direct telnet or similar
> access.
>
> I would appreciate any tips, best code, as I do not want to break
> anything on the website.
>
> Richard

I would probably open the files in binary mode and copy 128 KB - 512
KB at a time. I wouldn't copy a line at a time as it is possible that
one of the files contains a very long line.




From DustanGroups at gmail.com  Wed Aug 15 08:42:19 2007
From: DustanGroups at gmail.com (Dustan)
Date: Wed, 15 Aug 2007 12:42:19 -0000
Subject: Guitar Reviews
In-Reply-To: <1187181172.442413.193040@57g2000hsv.googlegroups.com>
References: <1187181172.442413.193040@57g2000hsv.googlegroups.com>
Message-ID: <1187181739.853467.94630@r34g2000hsd.googlegroups.com>

On Aug 15, 7:32 am, cve... at gmail.com wrote:
<snip>

>>> op.mother.speak()
Congratulations! You've just given your email address to millions of
people across Usenet!
What do you have to say for yourself?
>>> op.respond()
Awww, jeez, why'd y'all have to bring my mother into this?
>>> op.mother.speak()
You're grounded for a week!
>>> op.respond()
But-
Ah! No buts!
But-
To your room, mister!
Ok.
>>> # wha-?



From python at jayloden.com  Sat Aug  4 01:41:15 2007
From: python at jayloden.com (Jay Loden)
Date: Sat, 04 Aug 2007 01:41:15 -0400
Subject: Trying to find zip codes/rest example
In-Reply-To: <f8vhct$3g6$1@sea.gmane.org>
References: <f8vhct$3g6$1@sea.gmane.org>
Message-ID: <46B4117B.8090002@jayloden.com>

VanL wrote:
> Hello,
> 
> A couple months ago there was an example posted in a blog of a rest 
> interface for validating zip codes.  If I recall correctly, the backend 
> validator was written in python.
> 
> The validator demo page had a single text input; next to the text input 
> would appear either a green check or a red X depending on whether the 
> zip code was valid.
> 
> On the backend, the explanation of the demo included a discussion of 
> using HTTP status codes (200 for a valid zip, 406? for invalid) so that 
> the service could be used from a console as well.
> 
> I now cannot find this demo and the associated discussion.  Does anybody 
> remember this demo and where I might be able to find it?

I don't remember the demo, but a little creative googling turned up

http://bitworking.org/news/132/REST-Tips-URI-space-is-infinite

Which matches the description above perfectly, so I assume it's what you were after :-)

-Jay


From arkanes at gmail.com  Wed Aug  8 14:57:28 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 8 Aug 2007 13:57:28 -0500
Subject: Tkinter or wxpython?
In-Reply-To: <54bd9$46ba09ec$4275d90a$9068@FUSE.NET>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
	<7x7io8r6na.fsf@ruckus.brouhaha.com> <hgamo4-p2m.ln1@lairds.us>
	<46B9DE7B.3050909@codebykevin.com>
	<mailman.1750.1186587557.22759.python-list@python.org>
	<46B9F09B.2060903@codebykevin.com>
	<mailman.1757.1186592594.22759.python-list@python.org>
	<54bd9$46ba09ec$4275d90a$9068@FUSE.NET>
Message-ID: <4866bea60708081157i42eb21d7obc7bd86cd90d8568@mail.gmail.com>

On 8/8/07, Kevin Walzer <kw at codebykevin.com> wrote:
> Chris Mellon wrote:
>
> >> What do you mean here? Things like keyboard accelerators, menu
> >> placement, and so on? Those things are already natively implemented by
> >> Tk, and the developer just needs to invoke them. Sometimes some
> >> conditional code is required for stuff like keyboard accelerators (the
> >> "tk windowingsytem" command is useful for this), but again, it should
> >> Just Work.
> >>
> >> Or am I missing something?
> >>
> >
> > There's conventions for shortcuts and they vary by platform. For
> > example, home/end do different things on a mac vs on windows.
> > Scrollbars interact differently, and menu pulldowns operate
> > differently. To my knowledge, while Tile can replicate the *look* of
> > these things, it does not help with the interaction.
>
> On Windows and Mac, Tk gets the menus correct by default (menu is at the
> top of the screen on the Mac, attached to a window on Windows).

I was actually referring to click-and-hold vs just click. If Tk wraps
the native menu on OS X (it doesn't on Windows) then that'll be taken
care of though. I don't think you can emulate menus on OS X the way
you can on Windows, though, so if they're where they're supposed to be
they're probably native ones.


>The Tk
> scrollbar is native on the Mac; the Tile  scrollbar has problems. On
> Windows, the Tile scrollbar maps to Vista or XP or Win32, depending on
> Windows version. You need to correctly specify the command-accelerator
> in your code (on Windows it's the Control key, on the Mac it's Command),

That's an interesting gap, since Tk gets other more subtle stuff right.

> but assuming you do this, it works fine. I don't use "home" and "end"
> keys myself (I think these are more common on Windows than Mac) so I
> can't speak to that.

Just examples. Text navigation has different conventions on a Mac vs
Windows (or Gtk/KDE). I wouldn't expect Tk to get it right unless it
wrapped the native control (which would give all kinds if neat
benefits like spellcheck, too). Of course, if that's what it decides
to do it will eventually end up being wxPython ;)

>Under Tk, keyboard navigation with the tab key
> generally works as expected on the Mac, and I assume so for Windows as
> well.
>
> The biggest drawback with Tk/Tile on the Mac is that even with Tile
> theming, it's still a bit outdated--Tile hooks into some older API's on
> the Mac that are more compatible with Tk; for instance, the notebook
> tabs look like Jaguar-era tabs (c. 2002). The Tile scrollbar is broken,
> but the Tk one works natively.
>
> Tile on Windows looks pretty darn good--I've played with the Windows
> Inspection Tool Kit, a well-designed Tcl/Tk application on Windows XP
> that uses Tile, and it's indistinguishable from something developed in
> VB or Delphi. (See http://magicsplat.com/wits/screenshot.html). Tile on
> the Mac requires a bit more hackery, but it's quite possible to get
> something looking nearly native (see
> http://www.codebykevin.com/portauthority.html).
>
> As for X, Tk and Tile are more of a mixed bag, because there is simply
> no single standard to target. Standard Tk looks and feels like Motif, as
> you know. Some of the Tile themes under X don't look much better. The
> most popular Tile theme on X is probably Clam, which looks more like a
> modern Gtk Clearlooks-style theme (see
> http://tktable.sourceforge.net/tile/screenshots/demo-clam-unix.png or
> http://www.codebykevin.com/pylocate-tile-x11.png). As far as I know,
> Tk/Tile offers reasonable defaults for X, unless you are looking for
> specfic integration with a particular environment (i.e. Gnome or KDE);
> in that case it's not as acceptable.
>

The situation under *nix is more complex, where you may or may not
have a DE with its own preferred toolkit. I use Gnome, so I expect
(and require) my apps to either use Gtk or fake it well enough that I
can't tell the difference, but I don't judge the strength of a cross
platform toolkit on that.

There are some cases where you just can't do everything in the
toolkit. One of the things that I really like about wxPython from a
cross platform perspective is how easily it lets you tell it to "do
the right thing for this platform". Stock buttons let you have the
right icons under Gtk, but the descriptive labels that OS X expects.
There's a stock button sizer that gets the layout and order of
ok/cancel correct. If you use the stock IDs for your menus, wxPython
will put the about and preferences menus items in the right spot and
give you the correct preferences accelerator on OS X. Stuff like that.

> >
> > Don't think I'm singling out Tk, Gtk has exactly the same problem -
> > you can make the buttons look native, but it doesn't adjust the
> > behavior.
>
> Tk does a better job with platform-specific defaults and behaviors than
> Gtk. When I read complaints about Tk on Windows, it's more on how ugly
> Tk is, not that its menus/keyboard behaviors don't work correctly.
>

Gtk is pretty bad, using it's own dialogs and even it's own painting
model. Tk has some definite lacks, though. I find the menus especially
obnoxious. I'm unusually picky about native integration though.


From kyosohma at gmail.com  Fri Aug 17 10:36:35 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 17 Aug 2007 07:36:35 -0700
Subject: passing variables and values to texboxdisplays
In-Reply-To: <1187351867.699825.91860@57g2000hsv.googlegroups.com>
References: <1187351867.699825.91860@57g2000hsv.googlegroups.com>
Message-ID: <1187361395.507282.90540@z24g2000prh.googlegroups.com>

On Aug 17, 6:57 am, yadin <conra2... at yahoo.com> wrote:
> hi!
> Can any one tell me why is it that i can't see my second frame and why
> is the value of freq not Appended in the First frame ...thanks
> I know it is wx python  but it has to do with passing variables.thanks
>
> import wx
>
> def create(parent):
>     return Frame1(parent)
>
> [wxID_FRAME1, wxID_FRAME1FREQ, wxID_FRAME1FREQDISP,
> wxID_FRAME1STATICTEXT1,
> ] = [wx.NewId() for _init_ctrls in range(4)]
>
> class Frame1(wx.Frame):
>     def _init_ctrls(self, prnt):
>         # generated method, don't edit
>         wx.Frame.__init__(self, id=wxID_FRAME1, name='', parent=prnt,
>               pos=wx.Point(380, 179), size=wx.Size(241, 133),
>               style=wx.DEFAULT_FRAME_STYLE, title='Frame1')
>         self.SetClientSize(wx.Size(233, 99))
>
>         self.staticText1 = wx.StaticText(id=wxID_FRAME1STATICTEXT1,
>               label='frequency disp', name='staticText1', parent=self,
>               pos=wx.Point(24, 32), size=wx.Size(71, 13), style=0)
>
>         self.freqdisp = wx.TextCtrl(id=wxID_FRAME1FREQDISP,
> name='freqdisp',
>               parent=self, pos=wx.Point(104, 24), size=wx.Size(100,
> 21),
>               style=0, value='')
>
>         self.freq = wx.Button(id=wxID_FRAME1FREQ, label='get freq',
> name='freq',
>               parent=self, pos=wx.Point(24, 56), size=wx.Size(184,
> 23),
>               style=0)
>         self.freq.Bind(wx.EVT_BUTTON, self.OnButton1Button,
> id=wxID_FRAME1FREQ)
>
>     def __init__(self, parent):
>         self._init_ctrls(parent)
>
>     def OnButton1Button(self, event):
>
>         def create(parent):
>             return Frame2(parent)
>         [wxID_FRAME2, wxID_FRAME2FREQ, wxID_FRAME2FREQDISP,
> wxID_FRAME2STATICTEXT1,] = [wx.NewId() for _init_ctrls in range(4)]
>
>         class Frame2:
>             def __init__(self):
>                 #
>                 wx.Frame.__init__(self, id=wxID_FRAME2, name='',
> parent=prt,
>                       pos=wx.Point(400, 179), size=wx.Size(300, 133),
>                       style=wx.DEFAULT_FRAME_STYLE, title='Frame2')
>                 self.SetClientSize(wx.Size(233, 99))
>
>                 self.staticText1 =
> wx.StaticText(id=wxID_FRAME2STATICTEXT1,
>                       label='frequency goes here first',
> name='staticText2', parent=self,
>                       pos=wx.Point(24, 32), size=wx.Size(71, 13),
> style=0)
>
>                 self.freqdisp2 = wx.TextCtrl(id=wxID_FRAME2FREQDISP,
> name='freqdisp2',
>                       parent=self, pos=wx.Point(104, 24),
> size=wx.Size(100, 21),
>                       style=0, value=' ')
>
>                 self.freq = wx.Button(id=wxID_FRAME2FREQ, label='get
> freq', name='freq',
>                       parent=self, pos=wx.Point(24, 56),
> size=wx.Size(184, 23),
>                       style=0)
>                 self.freq.Bind(wx.EVT_BUTTON, self.OnButton2Button,
> id=wxID_FRAME2FREQ)
>
>             def __init__(self, parent):
>                 self._init_ctrls(parent)
>             def OnButton2Button(self, event):
>                 freqdisp.Append('this is it 24HZ!')
>
> if __name__ == '__main__':
>     app = wx.PySimpleApp()
>     frame = create(None)
>     frame.Show()
>
>     app.MainLoop()

Your 2nd frame isn't subclassing wx.Frame and there's nothing calling
the Show() method even if it had been.

Mike



From steve at holdenweb.com  Thu Aug 23 23:37:55 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 23 Aug 2007 23:37:55 -0400
Subject: IDE for Python
In-Reply-To: <46CDA242.3010108@bigfoot.com>
References: <mailman.55.1187690455.32294.python-list@python.org>	<1187698999.545439.322600@k79g2000hse.googlegroups.com>	<mailman.91.1187742207.32294.python-list@python.org>	<hTPyi.4052$Oo.2475@newssvr17.news.prodigy.net>
	<46CDA242.3010108@bigfoot.com>
Message-ID: <faljqo$vnc$1@sea.gmane.org>

Ricardo Ar?oz wrote:
> I V wrote:
>> On Tue, 21 Aug 2007 21:23:25 -0300, Ricardo Ar?oz wrote:
>>> 	Do you know if for in-house development a GPL license applies? (Qt4
>>> and/or Eric4).
>> (I'm not sure if I've understood your question right)
>>
>> If you distribute an app that _uses_ PyQT, you have to comply with the GPL
>> (or buy a license from Trolltech), but note that this doesn't really have
>> anything to do with Eric4. Running Eric4 doesn't require a license (either
>> the GPL or Trolltech), and code you write using Eric4 doesn't have to be
>> licensed according to the GPL either.
> 
> I think they key word would be 'distribute'. I don't plan to distribute
> the software. It will be used in-house for a commercial company which
> pays for my time, they'll keep the source code but they won't be
> distributing or selling it. Am I ok with QT4 ? (this is Windows).
> 
First: I am not a lawyer, so you should ask the licensor. But it seems 
to me that if the company you contract to (i.e. the end user) pays for 
the license there is little to cause anyone problems.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From whamil1 at entergy.com  Thu Aug 30 14:15:40 2007
From: whamil1 at entergy.com (Hamilton, William )
Date: Thu, 30 Aug 2007 13:15:40 -0500
Subject: list index()
In-Reply-To: <1188495863.242815.236900@o80g2000hse.googlegroups.com>
Message-ID: <588D53831C701746A2DF46E365C018CE01D2CB29@LITEXETSP001.etrsouth.corp.entergy.com>

> From: zzbbaadd at aol.com
> >
> > How could it not be an exception, in the plain English sense of the
> > word? Most certainly you're asking for the index because you want to
do
> > something with the index. If the item is not found, you have no
index,
> > so that's a special case that must be handled separately. There is
no
> > logical difference between handling that special case in an except
> > clause versus handling it with an if-branch.
> 
> In my case of have done os.listdir() on two directories. I want to see
> what files are in directory A that are not in directory B.
> I have used exceptions in other languages and only do so on logic that
> should never happen. In this case it is known that some of the files
> will not be in both lists. I just want to know which ones.
> 

I think you may be confusing exceptions and assertions.  Asserts are
generally used to trap conditions that should not happen, while
exceptions in Python are a standardized way to handle errors of all
sorts.  Where in C you would, say, open a file and check the return code
to ensure that the file actually exists before using it, in Python you
wrap the open statement in a try/except block instead.


--
-Bill Hamilton


From nrmn_ncjs at yahoo.com  Mon Aug 20 19:41:56 2007
From: nrmn_ncjs at yahoo.com (nrmn)
Date: Mon, 20 Aug 2007 16:41:56 -0700 (PDT)
Subject: wx.Frame event handler problems
Message-ID: <596840.12141.qm@web60620.mail.yahoo.com>

i have a function (event handler) inside a wx.Frame subclass which reads 2 kinds of data (differentiated by a prefix char) from a file and updates the text on the UI.

def onStartParsing(self, event):
        file = open('data.txt','r')  
        while 1:
            input = file.readline().strip('\r\n')           
            try:
                if input[0] == '-':     # data A
                    self.data_A_display.SetLabel(input.strip('-'))
                    wx.Yield()
                elif input[0] == '+':   # data B
                    self.data_B_display.SetLabel(input.strip('+'))
                    wx.Yield()
            except IndexError:   # EOF
                file.close()
                break

what i'd like to do is, if i click a button or an item in a menu, it will send the input variable to another pc through sockets. i am lost at how to 'update' the function such that it would look something like this:

# after a user has clicked a button
def onStartParsing(self, event):
         file = open('data.txt','r')  
        sock_a = socket(AF_INET,SOCK_DGRAM)
        sock_a.bind(ADDR)

         while 1:
             input = file.readline().strip('\r\n')   
            sock_a.sendto('%s' % input, ADDR)        
             try:
                 if input[0] == '-':     # data A
                     self.data_A_display.SetLabel(input.strip('-'))
                     wx.Yield()
                 elif input[0] == '+':   # data B
                     self.data_B_display.SetLabel(input.strip('+'))
                     wx.Yield()
             except IndexError:   # EOF
                 file.close()
                 break

another solution i thought was to create another event handler that contains the following body above, but it should terminate/stop running the while loop in the original onStartParsing event-handler. problem is i don't know how.

other solutions, suggestions are very much welcome.

-norman ancajas

       
---------------------------------
Need a vacation? Get great deals to amazing places on Yahoo! Travel. 
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From omari at smileystation.com  Tue Aug  7 10:08:47 2007
From: omari at smileystation.com (Omari Norman)
Date: Tue, 7 Aug 2007 10:08:47 -0400
Subject: All leading tabs or all leading spaces - why isn't that enforced?
In-Reply-To: <f98qa9$n9v$2@sea.gmane.org>
References: <y8Rti.1088$3x.121@newssvr25.news.prodigy.net>
	<f98qa9$n9v$2@sea.gmane.org>
Message-ID: <20070807140847.GA12398@cameron>

> I suppose we Pythonistas are just too permissive for our own good. 
> Consider the opportunity to use mixed tabs and spaces a piece of rope of 
> your preferred length ...

I thought I remembered reading somewhere that Python 3000 will ban tabs
as indentation characters, but now I can't turn up a link for it...

-- 
You can't lose what you never had.


From beema.shafreen at gmail.com  Thu Aug  2 07:25:54 2007
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Thu, 2 Aug 2007 16:55:54 +0530
Subject: beginner in python
Message-ID: <aa405c1f0708020425w12407dcfldb78540d19aa4990@mail.gmail.com>

Hi everybody ,
      I am a beginner in python,
         I have to fetch the redundant entries from a file,

code:

import re
L = []
fh = open('ARCHITECTURE_MAIN.txt','r')
for line in fh.readlines():
        data =line.strip()
#       splitted = data.split('#')
        L.append(data)
fh.close()


M=L
for x in L:
        x = x.split('#')
        for y in M:
            y = y.split('#')
        x_data = x[0],x[1],x[2],x[3]
        #print x_data
        y_data = y[0],y[1],y[2],y[3]
        #print y_dat
        if x_data[0] == y_data[0]:
              print x_data


i get the result as a tupule,
the text file which has datas separated by hash
entry#isoform#start#stop#  i have to check upto this

00250_1#ARCH_104#61#89#Literature#9224948#00250####
00250_1#ARCH_104#97#126#Literature#9224948#00250####
00250_1#ARCH_104#139#186#Literature#9224948#00250####
00251_1#ARCH_463#7#59#SMART##00251####
00251_1#ARCH_463#91#121#SMART##00251####
00251_1#ARCH_463#251#414#SMART##00251####
00251_1#ARCH_463#540#624#SMART##00251####
00252_1#ARCH_474#1#21#Literature#8136357#00252####
00252_1#ARCH_393#481#501#Literature#8136357#00252####
00252_1#ARCH_463#523#553#SMART##00252####
00253_1#ARCH_82#37#362#SMART##00253####
00253_1#ARCH_54#365#522#SMART##00253####
00253_1#ARCH_104#589#617#SMART##00253####
00253_1#ARCH_104#619#647#SMART##00253####
00253_1#ARCH_104#684#712#SMART##00253####
00254_1#ARCH_82#27#352#SMART##00254####
00254_1#ARCH_54#355#510#SMART##00254####
00254_1#ARCH_104#576#604#SMART##00254####
00254_1#ARCH_104#606#634#SMART##00254####
00254_1#ARCH_104#671#699#SMART##00254####
00255_1#ARCH_82#56#425#SMART##00255####
00255_1#ARCH_54#428#582#SMART##00255####
00255_1#ARCH_104#696#724#SMART##00255####




can you suggest me ,what are the improvement i have to make in the above
code
regards
shafreen
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From pyth0nc0d3r at gmail.com  Fri Aug 24 19:46:39 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Fri, 24 Aug 2007 18:46:39 -0500
Subject: Converting my script from MS-DOS to Tkinter ran in a problem.
Message-ID: <eb79828c0708241646x115a6a31ifcc9b7303f3fea9c@mail.gmail.com>

Ok my script works decent so far, but say in the add news menu, my window
dissapears right? but when i click add news on the main menu a new frame
gets added,  How can I remove the frames inside of my Toplevel?

import sys,os,urllib,urllib2,md5,random,string
from Tkinter import *
main = Tk()
main.withdraw()
false = 0
true = 1
logged_in = false
_user = ""
_pass = ""
_input1 = ""
_input2 = ""
url = "http://SITENAME.com/"
def dir_path():
    upath = os.path.realpath(os.path.dirname(sys.argv[0]))
    return upath
def md5_(hash):
    hash = md5.new(hash)
    hash = hash.hexdigest()
    return hash
class NewsSystem:
    def check_login(self):
        global e1,e2,master,_user,_pass,url,logged_in,true,choices
        _input1 = e1.get()
        _input2 = e2.get()
        domain = "%slogin.php?action=login" % (url)
        if _input1 != "" and _input2 != "":
            password = md5_(_input2)
            username = _input1
            send = {'username' : username,'password' : password }
            data = urllib.urlencode(send)
            request = urllib2.Request(domain,data)
            response = urllib2.urlopen(request)
            loggedin = response.read()
            if loggedin == "true":
                print "Logged in successful\n"
                logged_in = true
                _user = username
                _pass = password
                master.destroy()
                choices.deiconify()
            else:
                print "Login failed\n"
                logged_in = false
    def V(self):
        global v,textboxed,choices
        if v.get() == 1:
            choices.withdraw()
            textboxed.deiconify()
            self.addnews(textboxed)
        elif v.get() == 2:
            print v.get()
        elif v.get() == 3:
            print v.get()
        elif v.get() == 4:
            sys.exit()
        else:
            print "error";
    def addnews(self,main):
        menubar = Frame(main,relief=RAISED)
        menubar.pack(side=TOP)
        menuu = Menubutton(menubar,text="News Options")
        menuu.pack(side=LEFT)
        menuu.menu = Menu(menuu)
        menuu.menu.add_command(label='Add News')
        menuu.menu.add_command(label='Main Menu',command=self.main_menu)
        menuu.menu.add_command(label='Exit',command=self.close_me)
        menuu['menu'] = menuu.menu
        menuu.pack(side=LEFT)
        framx = Frame(main)
        framx.pack()

        self.textw = Text(framx,width=100,height=10)
        main.title("This is a textbox derr")
        scroll = Scrollbar(framx,command="scroll")
        self.textw.configure(yscrollcommand=scroll.set)
        scroll.pack(side=RIGHT)
        self.textw.pack()
    def close_me(self):
        sys.exit()
    def main_menu(self):
        global choices,textboxed
        choices.deiconify()
        textboxed.withdraw()
init = NewsSystem()
#Menu
choices = Toplevel()
choices.withdraw()
v = IntVar()
Radiobutton(choices, text="Add News", variable=v,value=1).pack(anchor=W)
Radiobutton(choices, text="Edit News", variable=v,value=2).pack(anchor=W)
Radiobutton(choices, text="Delete News", variable=v,value=3).pack(anchor=W)
Radiobutton(choices, text="Quit", variable=v,value=4).pack(anchor=W)
button = Button(choices, text="Action?",command=init.V).pack(anchor=W)
choices.title("What are your actions?")

#login
master = Toplevel()
Label(master, text="Username").grid(row=0, sticky=W)
Label(master, text="Password").grid(row=1, sticky=W)
e1 = Entry(master)
e2 = Entry(master,show="*")
e3 = Button(master,text="Login",command=init.check_login).grid(row=3,
sticky=W+E+S+N)
e1.grid(row=0, column=1)
e2.grid(row=1, column=1)
master.geometry("%dx%d" % (300,300))
master.title("Login!")

#textbox
textboxed = Toplevel()
textboxed.withdraw()
main.mainloop()
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From kbk at shore.net  Thu Aug 23 17:53:14 2007
From: kbk at shore.net (Kurt B. Kaiser)
Date: Thu, 23 Aug 2007 17:53:14 -0400 (EDT)
Subject: Final SF Python Patch/Bug Summary
Message-ID: <200708232153.l7NLrEUg021672@hampton.thirdcreek.com>

New / Reopened Patches
______________________

minidom pretty xml output improvement  (2007-08-19)
       http://python.org/sf/1777134  opened by  Teajay

removeTest() method patch for unittest.TestSuite  (2007-08-21)
       http://python.org/sf/1778410  opened by  Mark Edgington

robotparser.py fixes  (2007-08-21)
       http://python.org/sf/1778443  opened by  Indy

Remove redundancies inside class logging.Logger  (2007-08-22)
       http://python.org/sf/1779550  opened by  Carsten Grohmann

Replace AtheOS w/ Syllable  (2007-08-22)
       http://python.org/sf/1779613  opened by  Skip Montanaro

Make python build with gcc-4.2 on OS X 10.4.9  (2007-08-23)
       http://python.org/sf/1779871  opened by  Jeffrey Yasskin

Patches Closed
______________

distutils.util.get_platform() return value on 64bit Windows  (2007-07-27)
       http://python.org/sf/1761786  closed by  mhammond

MSVC6/7 issues with bdist_wininst and --target-version  (2004-07-01)
       http://python.org/sf/983164  closed by  mhammond

Override flags set by IOBase in io.StringIO  (2007-08-15)
       http://python.org/sf/1774828  closed by  avassalotti

Convert str to bytes in io.BytesIO.__init__  (2007-08-15)
       http://python.org/sf/1774833  closed by  avassalotti

BufReader, TextReader for PEP 3116 "New I/O"  (2007-06-04)
       http://python.org/sf/1731036  closed by  gvanrossum

utf-32 codecs  (2007-08-16)
       http://python.org/sf/1775604  closed by  gvanrossum

Make it possible to use SVK to develop Python  (2007-08-14)
       http://python.org/sf/1774414  closed by  collinwinter

New / Reopened Bugs
___________________

memoryview('test') is causing a segfault  (2007-08-19)
CLOSED http://python.org/sf/1777057  reopened by  tiran

Please warn about a subtle trap  (2007-08-19)
CLOSED http://python.org/sf/1777160  opened by  Greg Kochanski

Confusing typography Python Ref 5.9  (2007-08-19)
CLOSED http://python.org/sf/1777168  opened by  Greg Kochanski

IDLE Freezes After Running Scripts  (2007-08-19)
       http://python.org/sf/1777398  opened by  Ross Peoples

Python's strftime dislikes years before 1900  (2007-08-20)
       http://python.org/sf/1777412  opened by  Benno Rice

glob doesn't return unicode with unicode parameter  (2007-08-20)
       http://python.org/sf/1777458  opened by  Grzegorz Adam Hankiewicz

ctypes on Solaris  (2007-08-20)
       http://python.org/sf/1777530  opened by  Aki

rounding inconsisntency using string formatting  (2007-08-20)
CLOSED http://python.org/sf/1778207  opened by  Jim Hurlburt

Segfault.  (2007-08-21)
       http://python.org/sf/1778376  opened by  Maciek Fijalkowski

PyThreadState_SetAsyncExc and the main thread  (2007-08-22)
       http://python.org/sf/1779233  opened by  Rotem

urlparse.urljoin does not obey current uri rfc (rfc 3986)  (2007-08-22)
       http://python.org/sf/1779700  opened by  John Adams

Bugs Closed
___________

memoryview('test') is causing a segfault  (2007-08-18)
       http://python.org/sf/1777057  closed by  nnorwitz

memoryview('test') is causing a segfault  (2007-08-18)
       http://python.org/sf/1777057  closed by  nnorwitz

Please warn about a subtle trap  (2007-08-19)
       http://python.org/sf/1777160  closed by  gbrandl

Confusing typography Python Ref 5.9  (2007-08-19)
       http://python.org/sf/1777168  closed by  gbrandl

struni: str() doesn't call __str__() of subclasses of str  (2007-07-11)
       http://python.org/sf/1751598  closed by  tiran

rounding inconsisntency using string formatting  (2007-08-21)
       http://python.org/sf/1778207  closed by  loewis

mapitags.PROP_TAG() doesn't account for new longs  (2004-12-31)
       http://python.org/sf/1093389  closed by  mhammond

Overenthusiastic check in Swap?  (2004-04-01)
       http://python.org/sf/926910  closed by  mhammond



From horpner at yahoo.com  Sat Aug 11 07:28:18 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Sat, 11 Aug 2007 11:28:18 GMT
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
	<46B8626A.2070303@bigfoot.com>
	<mailman.1726.1186537161.22759.python-list@python.org>
	<5hsoi3F3mlni2U1@mid.individual.net> <f9ceb9$jsm$1@sea.gmane.org>
	<1186581124.3383.55.camel@dot.uniqsys.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
	<slrnfbk19k.20o.horpner@FIAD06.norwich.edu>
	<1i2nhxn.tme05x17r39odN%aleax@mac.com>
Message-ID: <m3hvi.37606$G23.6240@newsreading01.news.tds.net>

On 2007-08-11, Alex Martelli <aleax at mac.com> wrote:
> Neil Cerutti <horpner at yahoo.com> wrote:
>    ...
>> The Python Language Reference seems a little confused about the
>> terminology.
>> 
>>   3.4.7 Emulating numeric types
>>   6.3.1 Augmented assignment statements
>> 
>> The former refers to "augmented arithmetic operations", which I
>> think is a nice terminology, since assignment is not necessarily
>> taking place. Then the latter muddies the waters.
>
> Assignment *IS* "necessarily taking place"; if you try the augmented
> assignment on something that DOESN'T support assignment, you'll get an
> exception.  Consider:
>
>>>> tup=([],)
>>>> tup[0] += ['zap']
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: 'tuple' object does not support item assignment
>
> Tuples don't support item ASSIGNMENT, and += is an ASSIGNMENT,
> so tuples don't allow a += on any of their items.
>
> If you thought that += wasn't an assignment, this behavior and
> error message would be very problematic; since the language
> reference ISN'T confused and has things quite right, this
> behavior and error message are perfectly consistent and clear.

Thanks for the correction. I was under the illusion that
sometimes augmented assignment would instead mutate the
object.

-- 
Neil Cerutti


From victor.lebrun at gmail.com  Tue Aug 28 11:30:30 2007
From: victor.lebrun at gmail.com (vml)
Date: Tue, 28 Aug 2007 15:30:30 -0000
Subject: in design time activeX properties
Message-ID: <1188315030.750795.90330@22g2000hsm.googlegroups.com>

Hello,


Does anybody know how to modify the property of a design-time activeX
property ? using win32com



thank you for your help,



regards,

Victor



From gherron at islandtraining.com  Thu Aug 16 04:20:38 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 16 Aug 2007 01:20:38 -0700
Subject: python socket usage
In-Reply-To: <1187250839.541105.60900@r29g2000hsg.googlegroups.com>
References: <mailman.2046.1187250159.22759.python-list@python.org>
	<1187250839.541105.60900@r29g2000hsg.googlegroups.com>
Message-ID: <46C408D6.8000907@islandtraining.com>

markacy wrote:
> On 16 Sie, 09:42, O uz Yar mtepe <comp.... at gmail.com> wrote:
>   
>> Is it possible to send a data object like a tuple or a list in socket
>> programming? If so how? It seems with socket module it is only possible to
>> send strings.
>>
>> --
>> O uz Yar mtepehttp://www.yarimtepe.com/en
>>     
>
> Hi Oguz,
>
>    why don't you make a string out of your tuple, or list, send it via
> socket and make a tuple/list again?
>
>   
>>>> x = (1,2,3,4,5,6,7,)
>>>> type(x)
>>>>         
> <type 'tuple'>
>   
>>>> y = str(x)
>>>> type(y)
>>>>         
> <type 'str'>
>   
>>>> print y
>>>>         
> (1, 2, 3, 4, 5, 6, 7)
>   
>>>> z = tuple(y)
>>>> type(z)
>>>>         
> <type 'tuple'>
>   
Sure it's a tuple, but did you look at it?  Turning a sequence (which is
what a string is after all) into a tuple is an easy operation, but it's
surely not what you want here.

>>> x = (1,2,3,4,5,6,7)
>>> s = str(x)
>>> t = tuple(s)
>>> t
('(', '1', ',', ' ', '2', ',', ' ', '3', ',', ' ', '4', ',', ' ', '5',
',', ' ', '6', ',', ' ', '7', ')')

If you want to turn a string representation of an object back into an
object, you must eval the string. 
Moreover, if the tuple contains things other than simple integers (float
of strings of whatever) the string represtnataion of the object may not
be able to recover the original object accurately.  Worse yet, an eval
of an arbitrary string is a HUGE security hole.

If you really want to send any Python object through a socket, look up
the Pickle and cPickle modules.  These will marshal (as it's called) any
Python object of any type and complexity into a byte string which can be
sent across a socket.  On the receiving end of the socket, the byte
string can be turned back into an equivalent Python object.

Gary Herron



>
> Cheers,
> Marek
>
>   



From carsten at uniqsys.com  Wed Aug 29 21:00:52 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 29 Aug 2007 21:00:52 -0400
Subject: copying files
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE30E@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE30C@efmailx>
	<46D5C01B.7080202@bigfoot.com>
	<93066C069973ED448DC2BCEA9C44A7383BE30E@efmailx>
Message-ID: <1188435652.3251.3.camel@localhost.localdomain>

On Wed, 2007-08-29 at 17:03 -0400, Brian McCann wrote:
> what do the + signs do?

Start here: http://docs.python.org/tut/

-- 
Carsten Haese
http://informixdb.sourceforge.net




From news at sandipan.com  Wed Aug 29 21:40:55 2007
From: news at sandipan.com (Sandipan News)
Date: Wed, 29 Aug 2007 21:40:55 -0400
Subject: Pythonwin Install COM exceptions on Windows Vista Ultimate
In-Reply-To: <46d578dc$0$25911$ba4acef3@news.orange.fr>
References: <mailman.95.1188374497.28954.python-list@python.org>
	<46d578dc$0$25911$ba4acef3@news.orange.fr>
Message-ID: <00a701c7eaa6$d13c01f0$73b405d0$@com>

How do I deactivate UAC and Router?

I did run as Administrator and installed both Python and Pythonwin into
c:\Python25\

This is the error I got ...

Here is the log at the end of the install:

Copied pythoncom25.dll to C:\Outils\Python\pythoncom25.dll
Copied pywintypes25.dll to C:\Outils\Python\pywintypes25.dll
You do not have the permissions to install COM objects.
The sample COM objects were not registered.
-> Software\Python\PythonCore\2.5\Help[None]=None
-> Software\Python\PythonCore\2.5\Help\Pythonwin
Reference[None]='C:\\Outils\\Python\\Lib\\site-packages\\PyWin32.chm'
Creating directory C:\Outils\Python\Lib\site-packages\win32com\gen_py
Shortcut for Pythonwin created
Shortcut to documentation created
The pywin32 extensions were successfully installed.

Thanks.

Sandipan

-----Original Message-----
From: python-list-bounces+news=sandipan.com at python.org
[mailto:python-list-bounces+news=sandipan.com at python.org] On Behalf Of
M?ta-MCI (MVP)
Sent: Wednesday, August 29, 2007 9:19 AM
To: python-list at python.org
Subject: Re: Pythonwin Install COM exceptions on Windows Vista Ultimate

Hi!

Perso, on Vista, I :
  - deactive UAC
  - deactive firewall (I have a rooter)
  - run all like Administrator
  - install all in other DIR than "Program Files"

Result :  no problem.


-- 
http://mail.python.org/mailman/listinfo/python-list




From kyosohma at gmail.com  Fri Aug 31 09:34:51 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 31 Aug 2007 06:34:51 -0700
Subject: create Powerpoint via com
In-Reply-To: <EaNBi.20336$vg.15115@trnddc04>
References: <j7EBi.13372$Yg.7724@trnddc02>
	<1188500822.869925.194430@e9g2000prf.googlegroups.com>
	<EaNBi.20336$vg.15115@trnddc04>
Message-ID: <1188567291.037504.232850@r34g2000hsd.googlegroups.com>

On Aug 30, 11:55 pm, Alan Isaac <ais... at american.edu> wrote:
> kyoso... at gmail.com wrote:
> > <code>
>
> OK, creating bulleted lists, or tables,
> or adding pictures is all straightforward.
> How about chart creation (in Ppt 2003)?
> I do not see how to do this with Python.
>
> Thanks,
> Alan

Alan,

You probably need to browse the COM object using PythonWin, which is a
part of the ActiveState distro. You can also use Python's builtin
function, dir, to find out various methods of COM.

Here's some info in messing with charts in Excel, which should be
similar to chart manipulation in PowerPoint.

http://mail.python.org/pipermail/python-win32/2005-June/003511.html
http://mail.python.org/pipermail/python-win32/2003-March/000839.html
http://www.thescripts.com/forum/thread21565.html
http://mathieu.fenniak.net/plotting-in-excel-through-pythoncom/

Mike



From steveo at syslang.net  Tue Aug  7 12:09:31 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Tue, 7 Aug 2007 12:09:31 -0400 (EDT)
Subject: Another question about variable args.
Message-ID: <alpine.LFD.0.999.0708071151590.17089@saturn.syslang.net>

I have a structure I need to pack. I call struct.pack about a dozen times 
and each call takes about 53 arguments.

I create a sequence of the arguments:
a1 = 1
a2 = 2
a3 = 3
etc...
a54 = 88
myseq = (a1, a2, a3, a4 etc... a53)
Also I made

def mpack ( fmt, *ss ):
     print type(ss)
     for ii in ss:
         print 'ii = ', ii, 'type(ii) = ', type(ii)
     for ii in list(ss):
         print 'ii = ', ii, 'type(ii) = ', type(ii)
     return struct.pack(fmt, *ss )

In my main, this first print statement works.
print 'main:', mpack(ff, a, b, c, d, e, f, g, h, i)

1. For the life of me, I can't figure out what to do to get the next print 
to work. The idea is that I want to make my code clearer by not passing 
50+ args each time and to instead pass a sequence which when evaluated 
will be the desired list of args.

print 'main:', mpack(ff, subseq)

2. And then, if possible, I'd like to do it in such a way that one myseq 
is defined, its value can automagically be re-eval'd so I don't have to 
re-assign to myseq each time one of the 50+ variables changes prior to 
calling pack.

Does this make sense?

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From newsuser at stacom-software.de  Wed Aug 15 04:15:15 2007
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Wed, 15 Aug 2007 10:15:15 +0200
Subject: What does r"""any text""" mean ?
Message-ID: <f9ucmj$ja2$1@online.de>

... as you can find in os.py at line 1 ?

Regards Alexander


From orsenthil at users.sourceforge.net  Tue Aug 14 16:06:43 2007
From: orsenthil at users.sourceforge.net (O.R.Senthil Kumaran)
Date: Wed, 15 Aug 2007 01:36:43 +0530
Subject: import * is not allowed ??
In-Reply-To: <46C0F3CC.1050704@gmail.com>
References: <46C0F3CC.1050704@gmail.com>
Message-ID: <20070814200643.GB4517@gmail.com>

* stef mientki <stef.mientki at gmail.com> [2007-08-14 02:14:04]:

>   import * is not allowed in function 'JAL_MAIN_RUN' because it contains 
> a nested function with free variables (JAL_simulation_file.py, line 22)
> 
What is the actual error message you are getting?
Can you paste the stack trace or a link to the program?

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Aug 10 07:59:58 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 10 Aug 2007 13:59:58 +0200
Subject: The Future of Python Threading
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
Message-ID: <5i329uF3muir4U1@mid.individual.net>

Justin T. wrote:

> The detrimental effects of the GIL have been discussed several
> times and nobody has ever done anything about it. 

Also it has been discussed that dropping the GIL concept requires
very fine locking mechanisms inside the interpreter to keep data
serialised. The overhead managing those fine ones properly is not
at all negligible, and I think it's more than managing GIL.

> The truth is that the future (and present reality) of almost every
> form of computing is multi-core,

Is it? 8)

The question is: If it really was, how much of useful performance
gain would you get?

Regards,


Bj?rn

-- 
BOFH excuse #336:

the xy axis in the trackball is coordinated with the summer solstice



From zentraders at gmail.com  Fri Aug  3 13:55:38 2007
From: zentraders at gmail.com (Zentrader)
Date: Fri, 03 Aug 2007 17:55:38 -0000
Subject: i am new to python-Please somebody help
In-Reply-To: <mailman.1558.1186124330.22759.python-list@python.org>
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com>
	<46b249a4$0$31219$426a74cc@news.free.fr>
	<mailman.1558.1186124330.22759.python-list@python.org>
Message-ID: <1186163738.568489.129020@e16g2000pri.googlegroups.com>

On the discussion of rudeness, we have to include the OP.  He/She/it
did not even attempt a Google before posting, and posted with a
meaningless subject.  We'll chalk that up to newness, but some sort of
retort was called for IMHO.  How else do we learn the conventions that
govern rudeness.  Personally, there is only one form of rudeness that
can not be overlooked and that is the prima donna that says "My Way Is
The Only Way", or posts some nonsense like "that is not correct" with
no other explanation.  Any attempt to sincerely help, I can live with.



From exarkun at divmod.com  Thu Aug  9 10:36:52 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 9 Aug 2007 10:36:52 -0400
Subject: Stackless Integration
In-Reply-To: <81C07501-369D-4209-9A5F-34B446EDB8D3@jedimindworks.com>
Message-ID: <20070809143652.4947.1275552699.divmod.quotient.20533@ohm>

On Thu, 9 Aug 2007 05:05:31 -0700, Michael Bentley <michael at jedimindworks.com> wrote:
>
>On Aug 9, 2007, at 4:48 AM, Jean-Paul Calderone wrote:
>
>> On Thu, 09 Aug 2007 09:00:27 -0000, "Justin T."
>> <jmtulloss at gmail.com> wrote:
>>> Hi,
>>>
>>> I've been looking at stackless python a little bit, and it's awesome.
>>> My question is, why hasn't it been integrated into the upstream
>>> python
>>> tree? Does it cause problems with the current C-extensions? It seems
>>> like if something is fully compatible and better, then it would be
>>> adopted. However, it hasn't been in what appears to be 7 years of
>>> existence, so I assume there's a reason.
>>
>> It's not Pythonic.
>
>Can you be more specific?  It's a good question that I had thought
>about asking...

It was meant tongue in cheek.  "It's not Pythonic" is Pythoneer codespeak
for "I have an irrational dislike of it", which is the only reason that
has ever really been given for keeping Stackless separate from CPython.

Perhaps the most reason which comes closest to being tangible is that it
is "complex" and would require "maintenance".

Jean-Paul



From news at sandipan.com  Wed Aug 29 21:39:24 2007
From: news at sandipan.com (Sandipan News)
Date: Wed, 29 Aug 2007 21:39:24 -0400
Subject: Pythonwin Install COM exceptions on Windows Vista Ultimate
In-Reply-To: <1188393923.239537.20590@50g2000hsm.googlegroups.com>
References: <mailman.95.1188374497.28954.python-list@python.org>
	<1188393923.239537.20590@50g2000hsm.googlegroups.com>
Message-ID: <00a601c7eaa6$9b825870$d2870950$@com>

Here is the log at the end of the install:

Copied pythoncom25.dll to C:\Outils\Python\pythoncom25.dll
Copied pywintypes25.dll to C:\Outils\Python\pywintypes25.dll
You do not have the permissions to install COM objects.
The sample COM objects were not registered.
-> Software\Python\PythonCore\2.5\Help[None]=None
-> Software\Python\PythonCore\2.5\Help\Pythonwin
Reference[None]='C:\\Outils\\Python\\Lib\\site-packages\\PyWin32.chm'
Creating directory C:\Outils\Python\Lib\site-packages\win32com\gen_py
Shortcut for Pythonwin created
Shortcut to documentation created
The pywin32 extensions were successfully installed.

-----Original Message-----
From: python-list-bounces+news=sandipan.com at python.org
[mailto:python-list-bounces+news=sandipan.com at python.org] On Behalf Of
kyosohma at gmail.com
Sent: Wednesday, August 29, 2007 9:25 AM
To: python-list at python.org
Subject: Re: Pythonwin Install COM exceptions on Windows Vista Ultimate

On Aug 28, 8:20 pm, "Sandipan News" <n... at sandipan.com> wrote:
> What do I do? Can't do without Python!
> Any experience, advice, hope is welcome.
> Thanks.
> Sandipan

You need to post the error traceback along with some more information
so the community can help.

Mike

-- 
http://mail.python.org/mailman/listinfo/python-list




From ivlenin at gmail.com  Tue Aug 21 01:49:01 2007
From: ivlenin at gmail.com (I V)
Date: Tue, 21 Aug 2007 05:49:01 GMT
Subject: Newbie question about a web server
References: <1187593367.402094.235410@g4g2000hsf.googlegroups.com>
Message-ID: <h1vyi.34263$2v1.9002@newssvr14.news.prodigy.net>

On Mon, 20 Aug 2007 00:02:47 -0700, Frank Millman wrote:
> When responding to the POST data received, it sends a 301 response, no
> headers, and then the html page.
[...]
> According to the notes, "You don't have to know much about the HTTP
> protocol at all. Except some basic that when the client request
> something it is a "GET", and when the client sends something it is in
> our case a POST. Some basic responce codes like 200 is OK for GET, and
> 404 is file not found, 301 is OK for a Post."
[...]
> I googled for 'http response code 301', and found that it is actually
> a redirection code. It seems that the notes are misleading.
[...]
> So I guess my questions are -
>   1. what is the correct response for a POST?
>      I think the answer is 200.
>      However, I assume the author is trying to demonstrate a
> particular technique.
>      Can anyone explain what that may be.

The code at that site looks wrong to me; I suspect the original author
was confused about status codes. If you return a 301 redirect code, you
should include a Location: header specifying the URI to redirect to, which
that code doesn't do. Also, if you return a redirect code, you probably
shouldn't include any page content (except perhaps a link to the
redirected page). Note also that 301 is a permanent redirect, that is, it
should be used when the URI has changed permanently (and might cause your
browser to, e.g., update its bookmarks). You're probably not going to use
it in normal operation.

I'm not sure what the author was trying to do, but there is one quite
common case where redirects are used with POST request. When the POST
request does something that you are probably not going to want to repeat,
but you want the resulting page to contain information that the user might
want to refresh, it's common to have the POST return a 302 status (a
temporary redirect). 

One example where this is useful is posting comments to a forum or blog.
Usually, when the comment is posted, you want to return to the list of all
the comments. But the user might refresh that list of comments, and you
don't want their comment to be posted again when they refresh. So you
would have the POST for the comment respond, not with a list of comments,
but with a redirect _to_ the list of comments.


From hamish at cloud.net.au  Mon Aug 20 23:49:59 2007
From: hamish at cloud.net.au (Hamish Moffatt)
Date: Tue, 21 Aug 2007 03:49:59 GMT
Subject: Syslog
In-Reply-To: <1187654214.498082.225300@r34g2000hsd.googlegroups.com>
References: <1187654214.498082.225300@r34g2000hsd.googlegroups.com>
Message-ID: <Hhtyi.23800$4A1.21665@news-server.bigpond.net.au>

greg wrote:
> Could anyone tell me how I could syslog to a specific log (e.g. /var/
> log/daemon.log, /var/log/syslog.log...)?
> 
> Thanks very much in advance!

It's up to your syslogd to route messages into particular files, based 
on their facility and/or priority. Check out /etc/syslog.conf or 
equivalent on your system.


Hamish


From bj_666 at gmx.net  Thu Aug 30 10:50:09 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 Aug 2007 14:50:09 GMT
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.138.1188482060.28954.python-list@python.org>
Message-ID: <5jo3p1Fh543U1@mid.uni-berlin.de>

On Thu, 30 Aug 2007 09:53:53 -0400, Marshall T. Vandegrift wrote:

> The Python string types have both the method `index()` which throws an
> exception and the method `find()` which implements the same behavior but
> returns -1 for not-found substrings.  I would naively have assumed the
> `list` type to provide both as well, but it provides only `index()`.
> 
> Anyone know the reason for this lack of parallelism?

Historical reasons and IIRC the `find()` method on strings will go away in
Python?3.0.

Ciao,
	Marc 'BlackJack' Rintsch


From nmin at freenet.de  Thu Aug  9 08:30:00 2007
From: nmin at freenet.de (nmin at freenet.de)
Date: Thu, 09 Aug 2007 05:30:00 -0700
Subject: Jython - variables are stored somehow
Message-ID: <1186662600.413645.25430@22g2000hsm.googlegroups.com>

Hi,

I'm using Jython in combination with java.

I wrote a jython skript, which calls a function from another jython
module called library.py.

So, executing the function genData() in skript .py runs without
problem but if I execute the same function again, the data from the
first run is stored somehow and is added to the new data.

So, if you look at the result:
#1 in DatenTypen.py return an empty list each time the program runs.
Ok ... clear so far
#2 in library.py returns an empty list, when the program runs for the
first time ... but when the function is
called again, the list contains an element. Each time you call the
function again, one element is added!
Why??  out.abschnitte should be the same as printed in #1 or not?

Here is the code:

skript.py
======
from library import *

def genData():

 
out=DMS_sendFiles_ein_Abschnitt([["testdata1.test","testdata2.test","testdata3.test"]])

    return out

library.py
=======
from DatenTypen import AusgangsDatenDeichMonitor
from DatenTypen import DMS_Abschnitt
from DatenTypen import DMS_GeoData
from DatenTypen import DMS_GeoDataFile

def DMS_sendFiles_ein_Abschnitt(filelist):

    out=AusgangsDatenDeichMonitor()

    print "out.abschnitte: "+str(out.abschnitte) #2

    abschnitt=DMS_Abschnitt()

    for f in filelist:
        data=DMS_GeoData()

        for layer in f:

            datalayer=DMS_GeoDataFile()

            datalayer.dateiname=layer

            datalayer.dateiinhalt="TEST"

            data.layerFiles.append(datalayer)

        abschnitt.bildSequenze.append(data)

    out.abschnitte.append(abschnitt)

    return out

DatenTypen.py
===========

class AusgangsDatenDeichMonitor:

    abschnitte=[]

    def __init__(self):
        abschnitte=[]
        print "Abschnitt in DatenTypen: "+str(abschnitte) #1

class DMS_Abschnitt:

    bildSequenze=[]

    def __init__(self):
        abschnittsNummer=0
        bildSequenze=[]

class DMS_GeoData:

    layerFiles=[]

    def __init__(self):
        layerFiles=[]

class DMS_GeoDataFile:

    dateiinhalt="dateiinhalt"

    dateiname="dateiname"

    zipped=False

    def __init__(self):
        dateiinhalt="dateiinhalt"
        dateiname="dateiname"
        zipped=False

So, I read about deleting Instances with "del" ... but it does not
work at all.

Any Ideas?

Thanks  in advance

Simon



From cai.haibin at gmail.com  Thu Aug  9 22:51:44 2007
From: cai.haibin at gmail.com (james_027)
Date: Fri, 10 Aug 2007 02:51:44 -0000
Subject: accessing static attributes
Message-ID: <1186714304.352882.40520@j4g2000prf.googlegroups.com>

hi,

for example an request object ... is request.user the same as
request.__class__.user?

THanks
james



From bdesth.quelquechose at free.quelquepart.fr  Mon Aug 20 14:41:00 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 20 Aug 2007 20:41:00 +0200
Subject: way to define static method
In-Reply-To: <mailman.135.1187813614.32294.python-list@python.org>
References: <de6dc4a00708221234q63752cc2xc7ac1b64495ae95e@mail.gmail.com>
	<mailman.135.1187813614.32294.python-list@python.org>
Message-ID: <46ccb514$0$407$426a74cc@news.free.fr>

Eric CHAO a ?crit :
> Thanks a lot.
> 
> Because I found a solution about static method from
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52304

This is a largely outdated recipe (while it may be usefull if you have 
to write code for an old Python version).

> And that's a little bit difficult to understand.

This of course require some knowledge of Python's internals. But unless 
you have to deal with older Python versions, you don't have to care 
about this - just use:

class MyClass(object):
   @staticmethod
   def my_static_method(name):
     print name

FWIW, there's not much use for staticmethods in Python - usually, a 
plain function is what you want.


From jergosh at wp.pl  Thu Aug  9 16:50:16 2007
From: jergosh at wp.pl (=?UTF-8?B?R3J6ZWdvcnogU8WCb2Rrb3dpY3o=?=)
Date: Thu, 09 Aug 2007 22:50:16 +0200
Subject: Puzzled by "is"
In-Reply-To: <f9frbl$dps$1@sea.gmane.org>
References: <20070809194105.39BD11E400A@bag.python.org>
	<f9frbl$dps$1@sea.gmane.org>
Message-ID: <46BB7E08.4070809@wp.pl>

>
> Why? Because.
>
> Seriously, it's just an optimization by the implementers. There is no 
> need for more than one empty tuple, since tuples can never be modified 
> once created.
>
> But they decided not to create (1, ) in advance. They probably knew that 
> hardly anybody would want to create that tuple ;-) [Seriously: if you 
> started trying to predict which tuples would be used you would go 
> insane, but the empty tuple is the most likely candidate].
>   
That's just theorisation but I'd rather expect the interpreter simply 
not to create a second tuple while there already is an identical one. 
This could save some memory if the tuple was large (Although by the same 
token comparison of large tuples can be expensive). Admittedly the empty 
tuple is a special case but then 'Special cases aren't special enough to 
break the rules'.

A bit odd.

Best regards,
Greg


From kib2 at free.fr  Wed Aug 29 03:29:31 2007
From: kib2 at free.fr (tool69)
Date: Wed, 29 Aug 2007 09:29:31 +0200
Subject: encoding problems
Message-ID: <46d5215b$0$411$426a74cc@news.free.fr>

Hi,

I would like to transform reST contents to HTML, but got problems
with accented chars.

Here's a rather simplified version using SVN Docutils 0.5:

%-------------------------------------------------------------

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from docutils.core import publish_parts

class Post(object):
     def __init__(self, title='', content=''):
         self.title = title
         self.content = content

     def _get_html_content(self):
         return publish_parts(self.content,
             writer_name="html")["html_body"]
     html_content = property(_get_html_content)

# Instanciate 2 Post objects
p1 = Post()
p1.title = "First post without accented chars"
p1.content = """This is the first.
...blabla
... end of post..."""

p2 = Post()
p2.title = "Second post with accented chars"
p2.content = """Ce poste poss?de des accents : ? ? ? ?"""

for post in [p1,p2]:
     print post.title, "\n" +"-"*30
     print post.html_content

%-------------------------------------------------------------

The output gives me :

First post without accented chars
------------------------------
<div class="document">
<p>This is the first.
...blabla
... end of post...</p>
</div>

Second post with accented chars
------------------------------
Traceback (most recent call last):
File "C:\Documents and
Settings\kib\Bureau\Projets\python\dbTest\rest_error.py", line 30, in 
<module>
print post.html_content
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe8' in 
position 39:
ordinal not in range(128)

Any idea of what I've missed ?

Thanks.


From bignose+hates-spam at benfinney.id.au  Mon Aug  6 03:19:26 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 06 Aug 2007 17:19:26 +1000
Subject: Relative-importing *
References: <1185559874.299008.167010@x40g2000prg.googlegroups.com>
	<871weth2gg.fsf@benfinney.id.au>
	<pan.2007.07.28.06.17.39.399342@REMOVE.THIS.cybersource.com.au>
	<46ae3894$0$19609$426a34cc@news.free.fr>
	<1186200218.666444.254200@q3g2000prf.googlegroups.com>
	<87vebv9yrr.fsf@benfinney.id.au>
	<1186363732.188847.48070@q3g2000prf.googlegroups.com>
Message-ID: <87zm15870h.fsf@benfinney.id.au>

rbysamppi at gmail.com writes:

> (In addition, it probably would make the program somewhat slower to
> have an internal class inside every module, and performance is
> important to me, as I'm planning to use this project in a future
> game.

This is known as "premature optimisation", and it's harmful. It's
folly to avoid a core part of the language because you're worried
about hypothetical performance issues.

Instead, write your program so that it's easy to understand and
maintain; then, if it's noticeably slow, *measure* the performance
using profiling so you know exactly what is slow; then, and only then,
work on speeding up the slow parts.

> These modules are not going to have full-fledged object construction
> and so forth. I don't want to construct and use objects at all

If that's truly what you desire, you're using the wrong
language. Everything in Python is an object, even if you don't use
object-oriented programming.

> it seems like a waste of time and memory to me to inherit __new__,
> __del__, and so on.

You've stated that you're a beginner to programming, so you probably
are unaware that this statement has no basis in how class inheritance
actually works. The point is that inherited behaviour is implemented
in *one* place, not that it's repeated everywhere.

Moreover, this is a further expression of your tendency for premature
optimisation. You should aim instead to write code naturally (learning
what's natural when you're a beginner), and only once you have
something that *works* should you think about performance issues.

> All that I want these modules to do is to encapsulate varying
> information and behavior for /other/ objects to use.)

This sounds like an ideal case for seeting up a class hierarchy for
this move behaviour.

> But regardless of if it's the "right thing to do", do you all think
> it's an unintended bug?

Do we think what is an unintended bug?

I think if you go out of your way to avoid the class inheritance
system for implementing what looks strongly like a hierarchy of
behaviour, you will have design bugs. Hopefully now that you're
reading this thread, they won't be *unintended* bugs; whether you
*intentionally* proceed with a buggy design is up to you :-)

-- 
 \        "With Lisp or Forth, a master programmer has unlimited power |
  `\     and expressiveness. With Python, even a regular guy can reach |
_o__)                            for the stars."  -- Raymond Hettinger |
Ben Finney


From iapain at gmail.com  Mon Aug 27 14:41:15 2007
From: iapain at gmail.com (iapain)
Date: Mon, 27 Aug 2007 18:41:15 -0000
Subject: sorting a list of lists
In-Reply-To: <46D31827.9060400@web.de>
References: <1188233798.684136.263640@22g2000hsm.googlegroups.com>
	<1188235267.790442.193830@q5g2000prf.googlegroups.com>
	<46D31827.9060400@web.de>
Message-ID: <1188240075.549626.42020@i38g2000prf.googlegroups.com>

> Taking advantage of stable sorting is totally not a hack. The OP just tried
> the two sorting steps in the wrong order.

I didnt say not to use stable sorting, but write a generic function
and hacky code. It is always better to adopt a generic approach.




From steve at holdenweb.com  Fri Aug 10 06:35:48 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Aug 2007 06:35:48 -0400
Subject: Issues of state
In-Reply-To: <5i2lk3F3m8h60U1@mid.individual.net>
References: <op.tv98rva4wepdt4@ericb.pragmadev>	<7x8x8mpn37.fsf@ruckus.brouhaha.com>	<hblpo4-mgj.ln1@lairds.us>	<7xfy2t8l5n.fsf@ruckus.brouhaha.com>	<5uhro4-st8.ln1@lairds.us>	<f9f9mr$cch$1@sea.gmane.org>	<mailman.1800.1186676234.22759.python-list@python.org>
	<5i2lk3F3m8h60U1@mid.individual.net>
Message-ID: <f9hf22$kff$1@sea.gmane.org>

greg wrote:
> Jay Loden wrote:
>> Like most things involving dynamic client side-javascript code and AJAX
>> technology, it's a lot harder than you'd like it to be to solve the problem, but
>> in cases where the Back button is really an issue, it's worth the effort.
> 
> So if you're willing to put in a huge amount of time,
> effort and ingenuity, it's possible to overcome a
> problem that only existed in the first place because
> you chose an inappropriate technique for implementing
> a user interface...
> 
Exactly my point. Once you start to involve a complex framework to 
handle state and interactions you see less and less advantage to 
"desktop web" applications, since it's hard to match the directness and 
simplicity of a native GUI.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bbxx789_05ss at yahoo.com  Sun Aug 12 10:23:15 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 12 Aug 2007 07:23:15 -0700
Subject: wxPython - drawing without paint event
In-Reply-To: <5i8befF3o5no1U1@mid.individual.net>
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
	<1186738813.373909.96230@x35g2000prf.googlegroups.com>
	<1186796567.331348.42450@q3g2000prf.googlegroups.com>
	<5i5l0dF2lortaU1@mid.individual.net>
	<1186883988.585048.16590@m37g2000prh.googlegroups.com>
	<5i8befF3o5no1U1@mid.individual.net>
Message-ID: <1186928595.014008.61950@b79g2000hse.googlegroups.com>

On Aug 12, 6:06 am, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> I really recommend reading "wxPython in Action", or at least the
> tutorial.
>

I don't.  "wxPython in Action" is by far the worst computer book I've
ever purchased.  It's poorly organized, poorly written, and full of
mistakes--and it's expensive.  The fact that the authors foist that
piece of junk on unsuspecting newbies is a crime.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 10 08:26:20 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 10 Aug 2007 14:26:20 +0200
Subject: Stackless Integration
In-Reply-To: <46bc375b$0$406$426a34cc@news.free.fr>
References: <mailman.1786.1186660119.22759.python-list@python.org>	<46bb1df0$0$403$426a74cc@news.free.fr>
	<mailman.1797.1186674791.22759.python-list@python.org>
	<46bc375b$0$406$426a34cc@news.free.fr>
Message-ID: <46bc595f$0$439$426a74cc@news.free.fr>

Bruno Desthuilliers a ?crit :
> Steve Holden a ?crit :
(snip)
>> Twisted is a complex set of packages
> 
> Sure. Now I may be dumb, but I thought it was about stackless, not about 
> Twisted...

Sorry, didn't saw your other post.



From comp.ogz at gmail.com  Thu Aug 16 04:53:12 2007
From: comp.ogz at gmail.com (=?utf-8?q?O=C4=9Fuz_Yar=C4=B1mtepe?=)
Date: Thu, 16 Aug 2007 11:53:12 +0300
Subject: python socket usage
In-Reply-To: <46C408D6.8000907@islandtraining.com>
References: <mailman.2046.1187250159.22759.python-list@python.org>
	<1187250839.541105.60900@r29g2000hsg.googlegroups.com>
	<46C408D6.8000907@islandtraining.com>
Message-ID: <200708161153.12294.comp.ogz@gmail.com>

On Thursday 16 August 2007 11:20:38 Gary Herron wrote:
> If you really want to send any Python object through a socket, look up
> the Pickle and cPickle modules. ?These will marshal (as it's called) any
> Python object of any type and complexity into a byte string which can be
> sent across a socket. ?On the receiving end of the socket, the byte
> string can be turned back into an equivalent Python object.
>
> Gary Herron

As i read pickle module is Python-spesific. I need to talk with a Java 
application and get the infortion that it will send. What i do right now is 
listening a socket and reding the string that is sent by the java 
application. So the java application is sending a string and i am reading and 
parsing it and getting the related infortion i need. A more professional way 
may be the reading the object itself. Is it possible to get the array for ex. 
object that is sent from the Java application with sockets?

-- 
O?uz Yar?mtepe
http://www.yarimtepe.com/en


From jeff.fw at gmail.com  Wed Aug 29 13:31:10 2007
From: jeff.fw at gmail.com (Jeff)
Date: Wed, 29 Aug 2007 17:31:10 -0000
Subject: Creating a multi-tier client/server application
In-Reply-To: <46d59fa8$0$278$426a74cc@news.free.fr>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
	<46d57888$0$295$426a74cc@news.free.fr>
	<1188398008.538820.21960@d55g2000hsg.googlegroups.com>
	<46d59fa8$0$278$426a74cc@news.free.fr>
Message-ID: <1188408670.480447.42470@k79g2000hse.googlegroups.com>

Goldfish--thanks, I'll check it out.

> > That, or something similar, may be what I do.  It would mean, however,
> > developing my own method for transferring objects across the network,
>
> Why transfering "objects" ? You only need to transfer data.

I suppose I don't need to transfer objects, it just seems like it
would make it far easier (certainly less repetition of code) to
program the client-side app.






From uymqlp502 at sneakemail.com  Fri Aug 31 14:01:10 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Fri, 31 Aug 2007 11:01:10 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188552665.363115.175310@x35g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<1188547369.428712.194430@x35g2000prf.googlegroups.com>
	<1188552665.363115.175310@x35g2000prf.googlegroups.com>
Message-ID: <1188583270.535882.129540@l22g2000prc.googlegroups.com>


Michele Simionato wrote:

> I am curious. Why do you think I attacked you? The conversion went as
> follows:

I don't think you attacked me. I was referring to another person, who
apparently came to your
defense and *did* attack me.

For the record, I apologize for saying that you don't seem to know
what DbC is. I shouldn't
have made it personal. I should have just made the points I made and
let them stand on their
own.

Having said that, I think that some of the statements you made were
clearly excessive.
Unit testing is a thousand times better than DbC? How could that
possibly be? As I
tried to explain, DbC can be *used* for unit testing and *also* for
integrated system testing.

> I would not call that an attack. If you want to see an attack, wait
> for
> Alex replying to you observations about the low quality of code at
> Google! ;)

I don't know much about Google code, but I know that the line breaking
logic (or lack
thereof) on Google Groups is a constant annoyance to me. But maybe I
just haven't
figured out how to use it yet.



From kyosohma at gmail.com  Mon Aug  6 11:20:35 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 06 Aug 2007 15:20:35 -0000
Subject: Tkinter or wxpython?
In-Reply-To: <mailman.1677.1186412323.22759.python-list@python.org>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<mailman.1677.1186412323.22759.python-list@python.org>
Message-ID: <1186413635.676709.160020@j4g2000prf.googlegroups.com>

On Aug 6, 9:58 am, "Chris Mellon" <arka... at gmail.com> wrote:
> On 06 Aug 2007 07:39:12 -0700, Paul Rubin
>
>
>
> <"http://phr.cx"@nospam.invalid> wrote:
> > kyoso... at gmail.com writes:
> > >  I've read that Tkinter doesn't scale well if you're writing complex
> > > GUIs. I haven't been able to test this hypothesis though. However,
> > > since I had to rewrite VBA apps into Python, to get the right "look
> > > and feel" I needed the widgets that wxPython provided. Since I started
> > > out with C++, I find wxPython better than Tkinter, but it's all pretty
> > > subjective. Try them both!
>
> > Tkinteger (dang, I always end up typing it that way, I won't even
> > bother fixing the error) is easy to use for simple gui's, and it's
> > part of the standard python distro which for me is a big advantage (no
> > extra crap to download).  However, the widget set is rather ugly and
> > doesn't blend in well with anyone's native widgets; the widget
> > selection itself is rather narrow, and I think kyosohma may be right
> > that it doesn't scale well to complex gui's.  I've looked at the code
> > for IDLE's gui and it's terrifying.
>
> > At this point I think nobody should write desktop gui apps without a
> > good reason.  There is a fairly flexible and easy to program gui
> > already running on almost every desktop, namely the web browser.
> > Before you write a gui using some client side toolkit, ask yourself
> > whether you can instead embed a web server in your application and
> > write an HTML gui.  That approach is not always the answer, but it has
> > considerable advantages when you can do it that way.
>
> Some disadvantages of the web based platform:
>
> No native look and feel - constrained by the browser.
> No control over browser UI idioms. I had to write this post twice
> because the text control lost focus and I hit backspace, going back in
> the history and losing my work.
> No native integration - no "open file", no "browse the filesystem", no
> rich drag and drop, no copy/paste.
> No or poor dialogs. Poor multiple window support.
> More platforms to develop on and test with.
> Limited to CSS box model for layout.
>
> You can mitigate some of these constraints if you *require* the local
> web browser technique, rather than supporting local or remote access.
> You can mitigate more if you write your own browser host (along the
> lines of the dashboard in OS X), but then you get to write 3
> applications instead of one.
>
> The web is a terrible application platform. There is not a single web
> application in existence which has even half the UI functionality of a
> rich client application. There are some (even many) applications for
> which the benefit of global access and easy deployment makes up for
> the lack in functionality, but statements like "At this point I think
> nobody should write desktop gui apps without a good reason" are simply
> ludicrously misguided.

If you could use Python's antiquated Grail web browser and write
plugin applications, then that would be awesome! There are trade offs
with anything though.

Mike



From jakub.stolarski at gmail.com  Mon Aug 20 02:25:09 2007
From: jakub.stolarski at gmail.com (Jakub Stolarski)
Date: Mon, 20 Aug 2007 06:25:09 -0000
Subject: yet another indentation proposal
In-Reply-To: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
Message-ID: <1187591109.948771.144690@g4g2000hsf.googlegroups.com>

Why not just use comments and some filter. Just write # _{ at the
beginning and # _} at the end. Then filter just before runing
indenting with those control sequences? Then there's no need to change
interpreter.



From greg at cosc.canterbury.ac.nz  Fri Aug 17 00:22:23 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Fri, 17 Aug 2007 16:22:23 +1200
Subject: about negative polar plots
In-Reply-To: <1187076466.955318.249250@57g2000hsv.googlegroups.com>
References: <1187076466.955318.249250@57g2000hsv.googlegroups.com>
Message-ID: <5ikmb7F3nbe6vU1@mid.individual.net>

yadin wrote:
> hi am doing a polar plot of the radiation pattern of an antenna.
> the polar plots represents the value of the power in dB's and the dB
> go from -40dB to 0dB

Add 40 so that the range goes from 0 to 40, then
plot that to an appropriate scale.

--
Greg


From mensanator at aol.com  Sat Aug  4 21:50:38 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sat, 04 Aug 2007 18:50:38 -0700
Subject: Formatting Results so that They Can be Nicely Imported into a
	Spreadsheet.
In-Reply-To: <1186270555.514649.311280@d30g2000prg.googlegroups.com>
References: <1186270555.514649.311280@d30g2000prg.googlegroups.com>
Message-ID: <1186278638.931477.39760@z24g2000prh.googlegroups.com>

On Aug 4, 6:35?pm, SMERSH009 <SMERSH0... at gmail.com> wrote:
> Hi All.
> Let's say I have some badly formatted text called doc:
>
> doc=
> """
> friendid
> Female
>
>                             23 years old
>
>                             Los Gatos
>
>                             United States
> friendid
> Male
>
>                             24 years old
>
>                             San Francisco, California
>
>                             United States
> """
>
> How would I get these results to be displayed in a format similar to:
> friendid;Female;23 years old;Los Gatos;United States
> friendid;Male; 24 years old;San Francisco, California;United States
>
> The latter is a lot easier to organize and can be quickly imported
> into Excel's column format.
>
> Thanks Much,
> Sam

d = doc.split('\n')

f = [i.split() for i in d if i]

g = [' '.join(i) for i in f]

rec = []
temprec = []
for i in g:
    if i:
        if i == 'friendid':
            rec.append(temprec)
            temprec = [i]
        else:
            temprec.append(i)
rec.append(temprec)

output = [';'.join(i) for i in rec if i]

for i in output: print i

##    friendid;Female;23 years old;Los Gatos;United States
##    friendid;Male;24 years old;San Francisco, California;United
States



From ladynikon at gmail.com  Fri Aug  3 12:22:42 2007
From: ladynikon at gmail.com (Danyelle Gragsone)
Date: Fri, 3 Aug 2007 12:22:42 -0400
Subject: Eclipse and Python
Message-ID: <59f9c5160708030922m2f4f5179nf384135214246d14@mail.gmail.com>

Does anyone have any suggested websites for learning Eclipse the python way?

thanks,
Danyelle


From strombrg at gmail.com  Sat Aug 18 20:55:33 2007
From: strombrg at gmail.com (Dan Stromberg)
Date: Sun, 19 Aug 2007 00:55:33 GMT
Subject: Fatest standard way to sum bytes (and their squares)?
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
Message-ID: <9yMxi.1035$vU4.225@nlpi068.nbdc.sbc.com>

On Sun, 12 Aug 2007 02:26:59 -0700, Erik Max Francis wrote:

> For a file hashing system (finding similar files, rather than identical 
> ones), I need to be able to efficiently and quickly sum the ordinals of 
> the bytes of a file and their squares.  Because of the nature of the 
> application, it's a requirement that I do it in Python, or only with 
> standard library modules (if such facilities exist) that might assist.
> 
> So far the fastest way I've found is using the `sum` builtin and 
> generators::
> 
> 	ordinalSum = sum(ord(x) for x in data)
> 	ordinalSumSquared = sum(ord(x)**2 for x in data)
> 
> This is about twice as fast as an explicit loop, but since it's going to 
> be processing massive amounts of data, the faster the better.  Are there 
> any tricks I'm not thinking of, or perhaps helper functions in other 
> modules that I'm not thinking of?
>

I see a lot of messages attacking the CPU optimization, but what about the
I/O optimization - which admittedly, the question seems to sidestep.

You might experiment with using mmap() instead of read()...  If it helps,
it may help big, because the I/O time is likely to dominate the CPU time.


From http  Fri Aug  3 21:45:21 2007
From: http (Paul Rubin)
Date: 03 Aug 2007 18:45:21 -0700
Subject: How to pass a reference to the current module
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<pan.2007.08.04.01.46.50.985228@REMOVE.THIS.cybersource.com.au>
Message-ID: <7xy7gs9ioe.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
>         namespace = module.__dict__
>     return namespace[name]

Am I missing something?  It's likely that I just don't understand
the problem, but I don't understand these dictionary extractions
for what I thought would be an attribute lookup:

    Python 2.4.4 (#1, Oct 23 2006, 13:58:00) 
    >>> import math
    >>> parrot = getattr(math, 'sqrt')
    >>> print parrot(3)
    1.73205080757
    >>> 

That just seems like a cleaner way to access stuff in a module,
using the published interface instead of an implementation detail.


From tzuchien.chiu at gmail.com  Wed Aug 22 16:27:01 2007
From: tzuchien.chiu at gmail.com (tzuchien.chiu)
Date: Wed, 22 Aug 2007 20:27:01 -0000
Subject: Design philosophy of HTTPServer and BaseHTTPRequestHandler
In-Reply-To: <1187790329.575480.14070@i38g2000prf.googlegroups.com>
References: <1187776216.269456.310230@q4g2000prc.googlegroups.com>
	<1187790329.575480.14070@i38g2000prf.googlegroups.com>
Message-ID: <1187814421.263942.202220@x35g2000prf.googlegroups.com>

On 22 ago, 14:45, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
> The server is permanent; request handler instances are created and
> destroyed as HTTP requests arrive and are processed.
> You should store any permanent info in the server; your
> "BaseHTTPRequestHandler-derived class" can reference the server using
> its "server" attribute.

I found the server attribute in the source code (/Lib), but it is not
documented in Python Library Reference 18.19.

I wonder that if I can rely on this "undocumented" attribute?



From python at jayloden.com  Sat Aug  4 18:14:25 2007
From: python at jayloden.com (Jay Loden)
Date: Sat, 04 Aug 2007 18:14:25 -0400
Subject: Client-side HTML form processing with Python?
In-Reply-To: <1186263839.778333.143200@d30g2000prg.googlegroups.com>
References: <1186263839.778333.143200@d30g2000prg.googlegroups.com>
Message-ID: <46B4FA41.206@jayloden.com>

goldtech wrote:
> I want to have an HTML form from a local local html file write a text
> field's data to a local text file.
> 
> I have no client or server side tools like PHP, JAVA. I don't know
> JavaScript. I can not add anything to the workstation I am using. It's
> going to have to be a client-side solution - there's no CGI on the
> server, no PHP.
> 
> It's XP with MS-Office, so I guess I have the usual active-x, and I
> have Python 2.1.
> 
> Is there a way?  Thanks,
> Lee G.

Even if serving a local page, some kind of web server would be necessary in
order to process the request from the submitted form, and execute the Python CGI
script. I know you said you can't add anything to the workstation, but you must
be able to at least add Python scripts and html files, so perhaps you can get
away with adding a self-contained web server? I recommend TinyWeb (
http://www.ritlabs.com/en/products/tinyweb/ ). It's only 53k and supports all
the basic webserver functions, including CGI.

You can drop TinyWeb in your working directory, start it up with a simple
shortcut or batch file, and then have your local HTML form submit to a CGI
script processed through TinyWeb. I've used it for a very similar project
before, it's so tiny and lightweight that it really doesn't get in the way, and
the CGI portion works just fine with Python.

If you really can't add anything at all (not even Python packages??), the only
other way to do this that I can come up with would be to implement your own
simplistic web server in Python that receives the incoming request. Twisted has
a CGI-enabled web server in it, and CGIHTTPServer also offers one. However,
CGIHTTPServer uses os.fork and is not available on Windows:
http://www.python.org/doc/1.5.2p2/lib/module-CGIHTTPServer.html - but you could
possibly use it as a starting point.

Other than the above the only suggestion I can give would be to search for
another way to approach your problem. For instance, using an hta
http://msdn2.microsoft.com/en-us/library/ms536496.aspx or using a
Tkinter/wxWidgets GUI instead of an html form.

-Jay


From inq1ltd at inqvista.com  Sat Aug  4 13:51:10 2007
From: inq1ltd at inqvista.com (jim-on-linux)
Date: Sat, 04 Aug 2007 13:51:10 -0400
Subject: sqlite3 create table col width?
In-Reply-To: <1186245190.970687.307920@k79g2000hse.googlegroups.com>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<1186240708.874804.271030@b79g2000hse.googlegroups.com>
	<1186245190.970687.307920@k79g2000hse.googlegroups.com>
Message-ID: <200708041351.10507.inq1ltd@inqvista.com>

PY help,

Using sqlite3 v3.1.3

When I create a table collumn using;

newcollum VARCHAR(35),

I get a default of 10 spaces.

No matter what I set the size to I get 10 spqces, 
even using varchar(0) defaults to 10 spaces.

I would appreciae the help if someone could tell 
me what I'm missing, I want to varry the column 
sizes.

jim-on-linux





From yan.python at gmail.com  Tue Aug 14 07:22:28 2007
From: yan.python at gmail.com (yan.python at gmail.com)
Date: Tue, 14 Aug 2007 11:22:28 -0000
Subject: how to move cursor in Interactive Interpreter
In-Reply-To: <f9rivq$sfc$00$1@news.t-online.com>
References: <1187072484.626674.157200@x40g2000prg.googlegroups.com>
	<f9rivq$sfc$00$1@news.t-online.com>
Message-ID: <1187090548.811916.124450@x40g2000prg.googlegroups.com>

On 8 14 ,   2 44 , Peter Otten <__pete... at web.de> wrote:
>  yan.pyt... at gmail.com wrote:
> > i  have a question.
> > when i run Interactive Interpreter in linux command promt,how can i
> > move the cursor.
> > for example,when i enter a string,i often enter the quotation mark ""
> > first,and the move the cursor inside the mark to enter the string,in
> > windows,it is ok.but when i do that in linux,pressing the "left" key
> > will just print "^[[D" in the screen ,but not what i want.
> > so , how can i move the cursor Interactive Interpreter in linux?
> >  i've googled and find nothing useful.who i tell me what to do?
>
> Python uses GNU readline for cursor movements. The Python version that ships
> with your distribution should work out of the box. If you compile Python
> yourself make sure that the development package (not just the binary) is
> installed. For Suse this is readline-devel.
>
> Peter

thanks for your reply
I thought maybe i just didn't install readline correctly,so i deleted
python and tried to re-compile the source code(I downloaded the .bz2
version).This time ,I found in the "./Modules/Setup" the description
for "readline":

# GNU readline. Unlike previous Python incarnations, GNU readline is
# now incorporated in an optional module, configured in the Setup
file
# instead of by a configure script switch. You may have to insert a
# -L option pointing to the directory where libreadline.* lives,
# and you may have to change -ltermcap to -ltermlib or perhaps remove
# it, depending on your system -- see the GNU readline instructions.
# It's okay for this to be a shared library, too.

#readline readline.c -lreadline -ltermcap

dont know exactly what to do,I just delete the "#" mark in the line
"#readline readline.c -lreadline -ltermcap " , then tried to
"configure","make",but errors of readline occor here.
what am i supposed to do to install the module GNU readline correctly
then?
thanks

by the way,my linux is Mandriva 10



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  2 06:23:54 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 02 Aug 2007 12:23:54 +0200
Subject: Pythonic way for missing dict keys
In-Reply-To: <mailman.1493.1186042809.22759.python-list@python.org>
References: <mailman.938.1184958565.22759.python-list@python.org>	<pan.2007.07.21.00.20.54.768439@REMOVE.THIS.cybersource.com.au>	<mailman.954.1184989959.22759.python-list@python.org>	<Xns99748CC2DB4AAduncanbooth@127.0.0.1>	<1185041243.323915.161230@x40g2000prg.googlegroups.com>	<mailman.984.1185101740.22759.python-list@python.org>	<87lkd0eprj.fsf@pobox.com>	<mailman.1279.1185623588.22759.python-list@python.org>	<pan.2007.07.29.04.10.19.329342@REMOVE.THIS.cybersource.com.au>	<46b0ed0b$0$2257$426a74cc@news.free.fr>
	<mailman.1493.1186042809.22759.python-list@python.org>
Message-ID: <46b1b0ba$0$25340$426a74cc@news.free.fr>

Alex Popescu a ?crit :
> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote in
> news:46b0ed0b$0$2257$426a74cc at news.free.fr: 
(snip)
>> if hasattr(obj, '__call__'):
>>    # it's a callable
>>
>> but I don't find it so Pythonic to have to check for a __magic__
>> method. 
> 
> It looks like Python devs have decided it is Pythonic, because it is 
> already in the PEP. 

I do know, and I disagree with this decision.

FWIW, repr(obj) is mostly syntactic sugar for obj.__repr__(), 
getattr(obj, name) for obj.__getattr__(name), type(obj) for 
obj.__class__  etc... IOW, we do have a lot of builtin functions that 
mostly encapsulate calls to __magic__ methods, and I definitively don't 
understand why this specific one (=> callable(obj)) should disappear. I 
usually have lot of respect for Guido's talent as a language designer 
(obviously since Python is still MFL), but I have to say I find this 
particular decision just plain stupid. Sorry.


From iclark at mail.ewu.edu  Wed Aug 15 18:03:11 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Wed, 15 Aug 2007 15:03:11 -0700
Subject: All names in the current module
In-Reply-To: <f9vij0$1ln$1@sea.gmane.org>
References: <87d4xowymq.fsf@wilson.homeunix.com> <f9vij0$1ln$1@sea.gmane.org>
Message-ID: <f9vt6v$6aq$1@sea.gmane.org>

Ian Clark wrote:
> Torsten Bronger wrote:
>> Hall?chen!
>>
>> How can I get a list with all classes defined in the current module?
>> Thank you!
>>
>> Tsch?,
>> Torsten.
>>
> 
> Assuming you want to see all classes in the re module:
> 
>  >>> import re
>  >>> help(re) #best way
>  >>>
>  >>> def isclass(cls):
> ...     try:
> ...             return issubclass(cls, cls)
> ...     except TypeError:
> ...             pass
> ...     return False
> ...
>  >>> [cls for cls in dir(re) if isclass(getattr(re, cls))]
> ['Scanner', '_pattern_type', 'error']
> 
> Ian
> 

I love this list, I learn something new everyday. Didn't know about 
inspect.isclass(). Ignore this post and look at Lawrence's.

Ian



From FJIFALSDGVAF at spammotel.com  Fri Aug 17 14:12:30 2007
From: FJIFALSDGVAF at spammotel.com (Thomas Kellerer)
Date: Fri, 17 Aug 2007 20:12:30 +0200
Subject: best GUI library for vector drawing program
In-Reply-To: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
Message-ID: <5im6oeF3q5onpU1@mid.individual.net>


chewie54 wrote on 17.08.2007 15:27:
> Hello,
> 
> What would be the best cross-platform GUI library to use for a vector
> based CAD program ( something like Visio on Windows )   WxWidgets,
> Tk,   PyQt,  Java Swing,  Java SWT,????   I need the capibility to
> draw and edit in a window that looks like a page of paper so WYSIWYG
> is very important,  and I need to save the drawings in vector based
> file formats like PS, EPS,  SVG, as well as image formats like jpg,
> png, and gif.  Also, the images need to be high resolution so that
> they can be pasted into various other programs in Windows OS,  and
> Linux OS,  and the Mac OS.

The NetBeans Platform offers a nice module for this. NetBeans itself uses it for 
UML, BPEL and ERD modelling and other features (such as the visual XSD editor)

http://platform.netbeans.org/
http://graph.netbeans.org/


Thomas


From istvan.albert at gmail.com  Wed Aug  8 12:50:40 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Wed, 08 Aug 2007 16:50:40 -0000
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <1186589320.335950.142880@b79g2000hse.googlegroups.com>
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
	<1186583168.447608.114040@d55g2000hsg.googlegroups.com>
	<1186589320.335950.142880@b79g2000hse.googlegroups.com>
Message-ID: <1186591840.183931.21080@19g2000hsx.googlegroups.com>

On Aug 8, 12:08 pm, Paul Boddie <p... at boddie.org.uk> wrote:

> However, for every enthusiast of one approach, there
> will always be an enthusiast for another (see point #6):

True.

For example I for one also like the way the current print adds a
newline, the vast majority of the time that is exactly what I want. I
don't know if this will be kept when print becomes a function (might
be that some default parameters make it work the same way)

Which reminds me of an experience I had when I originally learned how
to program in Pascal, then moved on to C. At first it felt wrong that
I had to include the "\n" to print a new line at the end, seemed
unreadable (Pascal had separate functions: write and a writeln for
it). Today I'd consider it appallingly bad design to have separate
functions for such a small difference.

i.



From orsenthil at users.sourceforge.net  Sat Aug 18 07:29:13 2007
From: orsenthil at users.sourceforge.net (O.R.Senthil Kumaran)
Date: Sat, 18 Aug 2007 16:59:13 +0530
Subject: passing arguments with ampersands
In-Reply-To: <f6be0af40708180354u719f5c71p2be27e0ee8317f9b@mail.gmail.com>
References: <f6be0af40708180354u719f5c71p2be27e0ee8317f9b@mail.gmail.com>
Message-ID: <20070818112913.GA3632@gmail.com>

> Quote:D:\ftp\Music\Mixes & Compilations\Above & Beyond - Essential
> Mix\001_Essential_Mix_2004-06-06_-_Above_and_Beyond.txt

> when i put 'print sys.argv[1:]' at the very beginning of the script, all i
> get is this:
> 
> Quote:['D:\\ftp\\Music\\Mixes']
> 
Can you share the portion of the code?
Are you quoting the argument that you are passing?
for e.g:

#cat 1.py
import sys
print sys.argv[1]

#python 1.py "I am able to print the spaces and & characters"
I am able to print the spaces and & characters

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From malen at og-entertainment.com  Mon Aug 20 09:53:58 2007
From: malen at og-entertainment.com (Niklas Ottosson)
Date: Mon, 20 Aug 2007 15:53:58 +0200 (CEST)
Subject: Mouse control with ctypes in OS X
Message-ID: <20070820135358.0B3052303D@atmail.b-one.net>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070820/f634bc79/attachment.html>

From mail at timgolden.me.uk  Fri Aug 31 05:46:21 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 31 Aug 2007 10:46:21 +0100
Subject: list index()
In-Reply-To: <fOadnfwlCJbQfErbnZ2dnUVZ_jCdnZ2d@speakeasy.net>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<1188497498.3468.60.camel@dot.uniqsys.com>	<mailman.188.1188546300.28954.python-list@python.org>	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>	<1188551958.728836.137370@x35g2000prf.googlegroups.com>
	<fOadnfwlCJbQfErbnZ2dnUVZ_jCdnZ2d@speakeasy.net>
Message-ID: <46D7E36D.4000301@timgolden.me.uk>

Erik Max Francis wrote:
> Paddy wrote:
> 
>> I say the 'oll' in troll like the 'ol' in frolic, and pronounce roll
>> and role similarly.
>>
>> My accent is probably from the East Midlands of the UK, but is not
>> pronounced.
> 
> _Troll_ and _frolic_ aren't pronounced with the same "o" sound in any 
> accent I've ever heard of.  Which you pronounce _boat_ and _bot_ the 
> same way, too?

[Amusingly contemplating a trolling war about the pronunciation of "troll"]

Well they sound the same in my more-or-less South London accent.
I can't write those funny phonetic symbols (and I hate to
imagine the Unicode encoding hoops I'd have to jump through
to make them readable anyway) but both "o"s sound short to me.
Like "bot" rather than "boat" using your example.

TJG


From davmillar at gmail.com  Sat Aug 11 11:07:25 2007
From: davmillar at gmail.com (Dave)
Date: Sat, 11 Aug 2007 15:07:25 -0000
Subject: Public Telnet Server?
Message-ID: <1186844845.304731.18300@x40g2000prg.googlegroups.com>

Hi there. I'm a beginner at Python and I'm writing my first Python
script. It's a text adventure about coffee and mixing drinks and being
crazy and such. I keep updating it and want my friends to beta test it
for me, but some of them don't have the right version of Python or
don't want to get Python at all. Is there an easy way I can set up a
public telnet server so they can just telnet the server and play it?
If anyone could give me some options and/or advice, I'd really
appreciate it!

Dave



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  9 09:42:26 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 09 Aug 2007 15:42:26 +0200
Subject: Help with Dictionaries and Classes requested please.
In-Reply-To: <slrnfbm34n.n0.horpner@FIAD06.norwich.edu>
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
	<46baf183$0$433$426a74cc@news.free.fr>
	<46baf384$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bb00d4$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
	<slrnfbm34n.n0.horpner@FIAD06.norwich.edu>
Message-ID: <46bb19bb$0$399$426a74cc@news.free.fr>

Neil Cerutti a ?crit :
> On 2007-08-09, special_dragonfly <Dominic at PLEASEASK.co.uk> wrote:
>> Is there anyway for python to consider the values within a
>> string when entering the data into a dictionary. I know that
>> isn't very clear so here's an example:
>>
>> class MyClass(object):
>>     def __init__(self,name="",age=""):
>>         self.name=name
>>         self.age=age
>>
>> data="Gary,50"
>> d={0:[MyClass(data)]}
>> data="Adam,25"
>> d[0].append(MyClass(data))
>>
>> The data is coming from a text file working on a line by line
>> basis. I've just tried and I'm just getting the full string in
>> the first field. That seems logical, now I don't want it to
>> though!
> 
> That's what happens if you use 0 for the key every time. ;)

Hmmm... Neil, I may be wrong but I think you didn't get the point here. 
As I understand it,  Dominic's problem is that it gets strings like 
"Gary,50" and would like to call MyClass initializer this way : 
MyClass("Gary", "50")



From http  Mon Aug  6 15:10:44 2007
From: http (Paul Rubin)
Date: 06 Aug 2007 12:10:44 -0700
Subject: Tkinter or wxpython?
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
	<mailman.1680.1186416061.22759.python-list@python.org>
	<7x3aywr4tc.fsf@ruckus.brouhaha.com>
	<mailman.1684.1186422197.22759.python-list@python.org>
Message-ID: <7x8x8oqy17.fsf@ruckus.brouhaha.com>

"Chris Mellon" <arkanes at gmail.com> writes:
> Define "functionality". From the rest of your posts, that seems to be
> limited to "press buttons" and "type small amounts of non-formatted
> text" on the interaction side and "display small amounts of simply
> formatted text" on the output side.

OK, I can live with that, if you include displaying images on the
output side.

> I'm not denying that you can get
> by with this functionality in a large number of cases,

Precisely my point.

> but it's certainly not optimal in general. 
> If it were, we'd all still be using VT100 terminals.

Nah, HTML gui's are much easier to use than pure text interfaces,
because of the visual gui elements, pointing with the mouse, simple
control over fonts and color, etc.

> > > ...Gmail uses ajax instead of a page load 
> What you're calling "slickness" is what other people call "usable".

I notice google search doesn't use ajax (or didn't til recently) and
has satisfied an awful lot of users with simple html.

> My out of the box firefox install simply denies the operation and
> raises a javascript error.

Hmm, the user might have to change a setting in about:config but
that's certainly easier than installing a desktop application.  I
haven't done this with firefox.  In Communicator you'd just call
netscape.security.privilegemanager and ask for the permission that you
needed.

> > > How about something as simple as context menus?
> > Unnecessary slickness for many apps.  I've never needed it.
> How have you decided that you've never needed it? Have you ever worked
> with a UI designer or workflow expert? Or have you just never bothered
> to implement it and you never heard anything from your users? How
> closely have you worked with the users of your applications?

If the app has enough slickness requirements that the customer is
willing to pay for the attention of UI designers or workflow experts,
maybe it also needs context menus, I don't know.  Generally I'd say
there are several levels:

  1. In-house app that will have 1 to 10 users who run it now and
then.  Every minute of unnecessary development is wasting their money,
so they want the quickest and cheapest possible solution.  Web app is
very often an easier way to do this than desktop gui app, even if the
functionality is bare bones.  I've done several of these, either as
desktop apps or web apps, generally working closely with the user, and
nobody has said anything about context menus.  I think this case is
very common.  In some instances the sole user is me, so nobody else
has to be satisfied.

  2. Wide-use app that will have 1000's of users, including
non-in-house users who tend to distrust desktop installs.  Web app is
superior for deployment reasons even if you have to give up some ui
niceties.  This is what I do most of the time as a web developer.  I
tend to write simple html to implement functionality, then let a real
designer spiff it up to look slick on multiple browsers while I
concentrate on the backend programming.

  3. In-house app somewhere between 1 and 2, i.e. maybe there are
dozens or hundreds of users who will interact with the program all day
long.  Usability becomes more important, so this can go either way.
Maybe this is where you want to UI experts involved.  It sounds like
your CRUD apps are often in this category.  Not everybody's are.  Mine
haven't been so far.  If I were in this situation I'd consider both
the web and desktop approaches and could go either way depending on
the specific requirements.

  4. Shrink-wrap consumer app, zillions of units to ship, pizzazz
sells boxes, slickness is king.  You need a whiz-bang desktop gui done
by real artist/designers.  I'm just a coder, so my approach would be
write a slapdash tkinter or web gui to figure out the necessary
functionality in conjunction with UI specialists, then write a spec
based on the prototype and turn it over to the artistic gurus, with me
doing the backend stuff in cooperation with them.  I haven't so far
done anything like this even though I worked at a game company for a
while.  I think most of us can code our way through life without ever
doing it.

> As phishing attacks become more common, browsing are restricting the
> ability to remove or modify chrome.

I'm using firefox 2 and sites pop chromeless windows all the time, so
I'm not sure what browsers you're referring to.

> It depends on your target audience and deployment arena. The context
> is cross platform applications,

I don't see anything about cross platform in the OP's original post.
If cross platform were important I'd start asking whether the app
needed to be usable from mobile phones.  If yes, that weighs heavily
for browsers.

> You simply can't do much of anything beyond display text and basic
> crud with straightforward HTML without stying. If that is the sole
> limit of your UI needs, then bully for you but that's hardly the
> common case and I'd venture that you don't have the experience to
> support the rather sweeping claim you made.

I think it's a very common case, which is why so much stuff is being
done on the web instead of the desktop.

> That's simply not true, and I don't think you can objectively justify
> it. Besides, you specifically claimed HTML dialogs as being a
> replacement for "real" ones, and that can't be done using trivial
> interfaces. It requires DHTML, sometimes ajax, and/or browser support.

I guess I'm not sure what you mean about dialogs.  I would consider
some html input fields with a submit button to be a dialog.  Sometimes
a little client side JS can make things a bit nicer.  I guess that
technically counts as DHTML but if you keep it simple, you can avoid
most cross-browser issues.

> I would challenge the assumption that, starting from zero, it is less
> complicated to write a web application, much less a "pretend" web app
> using a local web server, than a desktop application using Tkinter
> (ick) or wxPython or pyQt. I would also challenge the assumption that
> 'a lot of the time' you can get away with a simple HTML interface, at
> least by my personal definition of 'get away with'. I've worked a lot
> with data entry people, where the actual requirements in terms of
> slickness and flash are quite small. But "basic html" simply does not
> fit the bill. There is a real cost in terms of how fast and how
> accurately they can enter data in this environment.

Well, not everybody needs to enter data all day long.  If they need to
enter seven numbers into a form once a week and it takes them 15
seconds with a special desktop app and 17 seconds with a web app and
there are only three users, go for the web app if it saves you any
development or support time.

> Exactly how much time do you think using an HTML interface with an
> embedded server would have saved you, especially considering the
> careful care you have to take with access to the serial port?

I am sure it would have saved at least half the development time of
that app.  But it's not a fair comparison since that was a 16 bit
MS-DOS app written in C.

> > I'm not saying file browsing is never needed, just that from
> > experimental observation, it's quite often not needed.
> 
> Plural of anecdote and all that. Make a survey of every application
> that you interact with and see how many of them need to interact with
> arbitrary files from the filesystem.

OK, looking at what's on my screen during most of my workday:

 1) one or more browser windows.  No file system interaction.
 2) Several terminal windows, no file interaction from the terminal
    itself, but I run command line apps (mostly emacs) in the terminals
    and those sometimes use the file system.
 3) Text chat client, I think it can send and receive files but I never
    use that feature.  I would not run this particular app if it were
    up to me but management chose it.  But it is a sort of legitimate
    use of a desktop gui.
 4) Email client again chosen by management.  This one does use the
    file system to send and receive attachments, but that's not
    fundamentally required since webmail clients are very popular and
    effective and can upload and download.  At home I read email with
    emacs.

The only other desktop gui program I can think of that I use with any
regularity is a PDF viewer occasionally launched by the browser.  More
typically this is done with a browser plugin rather than a separate
app, but my desktop is set up to launch xpdf separately.  Under
Windows I sometimes used IDLE for Python development but under Linux I
run python inside emacs.

> CRUD with javascript is something I actually have a lot of experience
> with. Deficiencies in the data entry UI have real consequences because
> you get invalid data and slow data entry speeds. The auto-completing
> combo-box, for example, is simply impossible in a browser without
> quite complicated (and slow) DHTML and is a huge boon for data entry.

I'm not sure what that combo box is.  I've probably seen one but I'm
just not sure exactly what you're referring to.  Maybe it's important
if you write heavily used CRUD apps.  Not everybody who needs a gui
writes those apps.

> I'm not trying to claim that there are no benefits to web
> applications. But I often see people touting the web as a *superior
> application platform*, which is simply false, and as innately simpler
> to develop for, which is also false.

I think it is simpler until you're trying to do stuff that's both
slick and multi-platform, but not everyone cares about being both of
those things simultaneously.  I generally don't care about slickness
and accomplish multi-platform by writing dirt-simple html.


From donn at u.washington.edu  Wed Aug 15 15:51:26 2007
From: donn at u.washington.edu (Donn Cave)
Date: Wed, 15 Aug 2007 12:51:26 -0700
Subject: Who told str() to round my int()'s!!!
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
	<slrnfc5t7i.vtl.hat@se-162.se.wtb.tue.nl>
Message-ID: <donn-345153.12512615082007@gnus01.u.washington.edu>

In article <slrnfc5t7i.vtl.hat at se-162.se.wtb.tue.nl>,
 "A.T.Hofkamp" <hat at se-162.se.wtb.tue.nl> wrote:

> On 2007-08-11, Adam W. <AWasilenko at gmail.com> wrote:
> > After a fair amount of troubleshooting of why my lists were coming
> > back a handful of digits short, and the last digit rounded off, I
> > determined the str() function was to blame:
> >
> >>>> foonum
> > 0.0071299720384678782
> >>>> str(foonum)
> > '0.00712997203847'
> >>>>
> >
> > Why in the world does str() have any business rounding my numbers, and
> > how do I get around this?
> 
> You have got a few good reactions already. What is not mentioned yet however 
> is
> the difference between str() and repr().

If only it could have stayed that way.

> 
> Python has two ways to stringify an object:
> 
> str() is intended to deliver a 'human-readable' representation of its 
> argument,
> and typically, humans think a few digits of a float is enough.

This is precisely the problem with this notion though:  you don't
have a good way to predict what will be "readable" (or worse, "friendly"
as people used to say in this context) to a human.  Adam W reads the
output of str() and it isn't what he expected, though usually it's
the other way around where people complain about repr().

More generally, there just isn't any humanity in the way we render
objects as text strings, a priori.  If there is any such thing, it
depends completely on the context.  To invite the author of an object
to devise a text rendition that will be humane (friendly, readable
or whatever) is to waste his or her time.  There are better ways to
conceive of this str/repr distinction, and they've been discussed
to death.  python.org documentation will probably never be fixed.

   Donn Cave, donn at u.washington.edu


From kyosohma at gmail.com  Tue Aug  7 14:30:13 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 07 Aug 2007 11:30:13 -0700
Subject: Dealing with multiple excel sheets
In-Reply-To: <1186509914.117596.249330@j4g2000prf.googlegroups.com>
References: <1186509914.117596.249330@j4g2000prf.googlegroups.com>
Message-ID: <1186511413.666702.294100@m37g2000prh.googlegroups.com>

On Aug 7, 1:05 pm, Rohan <vodela.... at gmail.com> wrote:
> Hello,
> I would like to write a script which does the following job.
> Take column1 and 7 from 10 different excel sheets and pasthe them into
> a new excel worksheet.
> Any ideas on how to do it
> Thanks,

Try studying this code:

http://snippets.dzone.com/posts/show/2036

or this:

http://www.oreilly.com/catalog/pythonwin32/chapter/ch12.html

or this:

http://mathieu.fenniak.net/plotting-in-excel-through-pythoncom/

Learning COM objects can be fun...or it can be a pain, depending on
your attitude and what you're trying to automate.

Mike



From python at jayloden.com  Thu Aug  9 13:46:51 2007
From: python at jayloden.com (Jay Loden)
Date: Thu, 09 Aug 2007 13:46:51 -0400
Subject: Puzzled by "is"
In-Reply-To: <20070809173855.9FDEB1E4009@bag.python.org>
References: <20070809173855.9FDEB1E4009@bag.python.org>
Message-ID: <46BB530B.3030304@jayloden.com>

Dick Moores wrote:
>  >>> () is ()
> True
>  >>> (1,) is (1,)
> False
> 
> Why?
> 
> Thanks,
> 
> Dick Moores

>From the docs for 'is':



From AWasilenko at gmail.com  Sat Aug 11 13:10:05 2007
From: AWasilenko at gmail.com (Adam W.)
Date: Sat, 11 Aug 2007 17:10:05 -0000
Subject: Who told str() to round my int()'s!!!
In-Reply-To: <5i67roF3ml00gU4@mid.uni-berlin.de>
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
	<5i67roF3ml00gU4@mid.uni-berlin.de>
Message-ID: <1186852205.973858.284130@r34g2000hsd.googlegroups.com>

On Aug 11, 12:53 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> If `str()` would not round you would get very long numbers because of the
> inaccuracies of floating point values.  I know Python is lying when 0.1
> prints as 0.1, but do you really want to see
> 0.10000000000000000555111512312578270211815834045410156250 instead?

I want str() to convert whatever I give it to a string and do nothing
else.  I will worry about long FP values in previous steps.  I still
find it very disturbing that str() is doing this AND it is
undocumented in all of my books.

> Use string formatting to tell the number of digits you want to see:
>
> In [16]: '%.56f' % 0.1
> Out[16]: '0.10000000000000000555111512312578270211815834045410156250'

The book I used to learn Python never introduced string formatting, I
suppose I will have to use another and learn it if that is the only
way...




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Aug 13 16:11:01 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 13 Aug 2007 22:11:01 +0200
Subject: python + XUL
References: <1186894004.913359.132000@b79g2000hse.googlegroups.com>
	<46BEA6FC.9050907@web.de>
	<1186966451.081184.63490@r34g2000hsd.googlegroups.com>
	<1186979744.039833.213840@r34g2000hsd.googlegroups.com>
Message-ID: <5ibs6lF3oae7fU1@mid.individual.net>

Madhu Alagu wrote:
> Has anyone had any success in getting XUL to work with python?

Yes.

http://www.google.de/search?q=xul+python
http://en.wikipedia.org/wiki/Search_engine


Bj?rn

-- 
BOFH excuse #74:

You're out of memory



From Afro.Systems at gmail.com  Tue Aug 14 05:45:04 2007
From: Afro.Systems at gmail.com (Tzury)
Date: Tue, 14 Aug 2007 09:45:04 -0000
Subject: ctypes windll question
Message-ID: <1187084704.869276.317030@r34g2000hsd.googlegroups.com>

I followed the tutorial about ctypes and I still cannot figure out how
to call a method of a calss within the dll.

For example:
a dll named 'foo' contain a class named 'bar' which expose a method
named 'baz'.

if I either do:

mydll = windll.foo
mycls = mydll.bar

or
mycls = windll.foo.bar

or
mycls = windll.foo.bar()

I get an erros: "function 'bar' not found " which is right, since bar
is a class and not a function. However, I still need to  create an
instance of this inner class (bar) so I can access its public method
(baz).

I cannot find anywhere instructions for that.



From larry.bates at websafe.com  Wed Aug 29 09:48:09 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 29 Aug 2007 08:48:09 -0500
Subject: Pythonwin Install COM exceptions on Windows Vista Ultimate
In-Reply-To: <mailman.95.1188374497.28954.python-list@python.org>
References: <mailman.95.1188374497.28954.python-list@python.org>
Message-ID: <JqqdnTvJir4T5EjbnZ2dnUVZ_qninZ2d@comcast.com>

Sandipan News wrote:
> What do I do? Can't do without Python!
> Any experience, advice, hope is welcome.
> Thanks.
> Sandipan
> 
> 
If you are asking if you can run COM objects created in Python on Windows Vista 
Ultimate, the answer is yes.  I have several.

-Larry


From cai.haibin at gmail.com  Thu Aug 16 22:29:47 2007
From: cai.haibin at gmail.com (james_027)
Date: Fri, 17 Aug 2007 02:29:47 -0000
Subject: to property or function in class object
Message-ID: <1187317787.848991.242720@i38g2000prf.googlegroups.com>

hi,

i am very new to python, not knowing much about good design. I have an
object here for example a Customer object, where I need to retrieve a
info which has a number of lines of code to get it.

my question is weather what approach should I use? to use the property
which is from the python new class style as I understand or simple use
function that will return the the info I needed.

class Customer(object):

current_balance = property(fget=_get_current_balance)

def _get_current_balance(self):
   # coding here

or

def get_current_balance(self):
   # coding here

While both approach would get the job done, I don't know much about
the performance, benefits, design philosophy between the two approach.
Any lecture will be very appreciated.

Thanks
james



From bignose+hates-spam at benfinney.id.au  Wed Aug 29 19:38:29 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 30 Aug 2007 09:38:29 +1000
Subject: IDE for Python
References: <46CAB7D4.5070308@gmail.com>
	<mailman.277.1187982888.32294.python-list@python.org>
	<mailman.115.1188417806.28954.python-list@python.org>
Message-ID: <87tzqhewsq.fsf@benfinney.id.au>

Stefan Behnel <stefan.behnel-n05pAM at web.de> writes:

> Eric CHAO wrote:
> > I think many python developers don't need such an IDE actually. Just
> > like Ruby guys, they use a powerful editor, for example, Textmate,
> > instead of all-in-one IDE. It's quick and direct.
> 
> True. However, some use neither an editor nor an IDE but Emacs.

"Neither"? Emacs is both editor *and* IDE.

-- 
 \        "Some people, when confronted with a problem, think 'I know, |
  `\   I'll use regular expressions'. Now they have two problems."  -- |
_o__)                            Jamie Zawinski, in alt.religion.emacs |
Ben Finney


From programmer.py at gmail.com  Wed Aug  8 21:37:32 2007
From: programmer.py at gmail.com (programmer.py at gmail.com)
Date: Wed, 08 Aug 2007 18:37:32 -0700
Subject: accessing parts of large files with File.seek()
In-Reply-To: <1186591585.175399.139850@x40g2000prg.googlegroups.com>
References: <1186591585.175399.139850@x40g2000prg.googlegroups.com>
Message-ID: <1186623452.207655.224400@22g2000hsm.googlegroups.com>

On Aug 8, 11:46 am, "mhearne808[insert-at-sign-here]gmail[insert-dot-
here]com" <mhearne... at gmail.com> wrote:
> I'm having a problem with the File object's seek() method.
> Specifically, I cannot use it to seek to a location in a binary file
> that is greater than 2^31 (2147483648).  This seems unnecessarily
> limiting, as it is common these days to have files larger than 2 GB.
>
> Is there some LargeFile object out there that I can use to read my
> file, which is approximately 3.3 GB in size?
>
> Python version (freshly built from source this morning):
> Python 2.5.1 (r251:54863, Aug  8 2007, 09:23:05)
> [GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin
>
> Thanks,
>
> Mike

I use large files quite a bit, but in Windows & Linux.  Here's a quick
excerpt of a local ubuntu-linux session...

jaime at elizabeth:/var/virtualbox/VDI$ ls -l
total 1682536
-rw-rwx--- 1 jaime vboxusers      40960 2007-07-20 21:41 windows
xp.vdi
-rw-rwx--- 1 jaime vboxusers 3591387136 2007-07-20 21:53 winxp.vdi
jaime at elizabeth:/var/virtualbox/VDI$ ipython
Python 2.5.1 (r251:54863, May  2 2007, 16:27:44)
Type "copyright", "credits" or "license" for more information.

IPython 0.7.3 -- An enhanced Interactive Python.
?       -> Introduction to IPython's features.
%magic  -> Information about IPython's 'magic' % functions.
help    -> Python's own help system.
object? -> Details about 'object'. ?object also works, ?? prints more.

In [1]: f = file('winxp.vdi')

In [2]: f.seek(3591387132)

In [3]: f.read()
Out[3]: '\x00\x00\x00\x00'

In [4]:

What exception are you receiving?  (Not that I can offer any advice,
as I don't have a Mac to use for testing.)...

jw



From gagsl-py2 at yahoo.com.ar  Sun Aug 26 22:43:02 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 26 Aug 2007 23:43:02 -0300
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csoronscqp7d2@corp.supernews.com>
	<1188090322.663217.102750@22g2000hsm.googlegroups.com>
	<13d4bucfm4m1lc4@corp.supernews.com>
Message-ID: <op.txo5t0i7x6zn5v@gabriel2.softlabbsas.com.ar>

En Sun, 26 Aug 2007 22:58:35 -0300, bambam <david at asdf.asdf> escribi?:

> Ok, many environments are capable of cached evaluation
> of functions without variable parameters so
>     range(5)
> is cached, but
>     range(v) is re-evaluated every time. Is this defined
> behaviour?

The range builtin function returns a list, and lists are mutable objects,  
so it must return a *different* list each time.

> That is, is it defined what Python does for
>     for i in f()
> I'm sure it must be, but I haven't seen it yet. If I have
> a user defined function returning a range, is it defined
> that the range function is called on every loop? If I
> have a function returning a range taking a parameter,
>     for i in f(v)
> is it defined that the variable is evaluated for every loop?

Find all the (mostly negative) answers yourself in  
<http://docs.python.org/ref/for.html>

-- 
Gabriel Genellina



From rdm at rcblue.com  Sun Aug 12 23:41:26 2007
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 12 Aug 2007 20:41:26 -0700
Subject: Binary, Hex, and Decimal string conversions
In-Reply-To: <649D1D6C-A44C-4D03-920D-489BBD108789@jedimindworks.com>
References: <496954360708111559s1cef4212pabd14e95b27435ea@mail.gmail.com>
	<C5FFAC23-F5DC-4112-A508-EC9BDF2FAB43@jedimindworks.com>
	<496954360708121620r4dd68ac9o430326ae8c8ae04d@mail.gmail.com>
	<649D1D6C-A44C-4D03-920D-489BBD108789@jedimindworks.com>
Message-ID: <20070813034138.CA4C81E4012@bag.python.org>

At 07:04 PM 8/12/2007, Michael Bentley wrote:

>On Aug 12, 2007, at 6:28 PM, Dick Moores wrote:
>
>>n = 12
>>base = 36
>>print to_base(n, base)
>>==========================================
>>This seems to work fine for n >= base, but not for n < base. For 
>>example, the code shown returns "c". Is my indentation wrong, or 
>>the code? It seems to me that the code should work for the general 
>>case, not just for n >= base.
>
>Isn't 'c' the correct answer?

Yes, of course. Stupid of me.

Dick




From jkrukoff at ltgc.com  Wed Aug  8 13:45:49 2007
From: jkrukoff at ltgc.com (John Krukoff)
Date: Wed, 8 Aug 2007 11:45:49 -0600
Subject: 'Advanced' list comprehension? query
Message-ID: <003d01c7d9e3$f55c50e0$0201a8c0@naomi>

John Krukoff wrote:
> 
> pyscottishguy at hotmail.com wrote:
> > Hi,
> >
> > I'm playing around with list comprehension, and I'm trying to find the
> > most aesthetic way to do the following:
> >
> > I have two lists:
> >
> > noShowList = ['one', 'two', 'three']
> >
> > myList = ['item one', 'item four', 'three item']
> >
> > I want to show all the items from 'myList' that do not contain any of
> > the strings in 'noShowList'.
> >
> > i.e. 'item four'
> >
> > I can do it like this:
> >
> > def inItem(noShowList, listitem):
> >     return [x for x in noShowList if x in listitem]
> >
> > print [x for x in myList if not inItem(noShowList, x)]
> >
> > and I can do it (horribly) with:
> >
> > print [x for x in myList if not (lambda y, z:[i for i in y if i in z])
> > (noShowList, x)]
> >
> > I can also print out the items that DO contain the 'noShowList'
> > strings with:
> >
> > print [x for x in myList for y in noShowList if y in x]
> >
> > but I can't get the 'not' bit to work in the above line.
> >
> > Any ideas?
> > Thanks!
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> 
> So, conceptually speaking, you're dealing with two loops here, one over
> the items to filter, and one over the items to check for substring
> matches. If you want to do that with list comprehensions, I'd make it
> obvious that there's two of them:
> 
> >>> [ listItem for listItem in myList if not [ noShow for noShow in
> noShowList if noShow in listItem ] ]
> ['item four']
> 
> This is a pretty good place for the functional programming tools though,
> specifically "filter",
> http://docs.python.org/tut/node7.html#SECTION007130000000000000000
> , which gives a solution that looks like this:
> 
> >>> filter( lambda listItem : not [ noShow for noShow in noShowList if
> noShow in listItem ], myList )
> ['item four']
> 
> or using purely functional tools, like this:
> 
> >>> filter( lambda listItem : not sum( map( lambda noShow: noShow in
> listItem, noShowList ) ), myList )
> ['item four']
> 
> All these solutions have the problem that they're still less efficient
> than the unwrapped for loop, like so:
> 
> >>> aFiltered = []
> >>> for listItem in myList:
> ...     for noShow in noShowList:
> ...         if noShow in listItem:
> ...             break
> ...     else:
> ...         aFiltered.append( listItem )
> ...
> >>> aFiltered
> ['item four']
> 
> This is due to the list comprehensions testing all the possiblities,
> instead of giving up on the first one found. You can jam that early break
> into the functional approach using itertools, but it starts to look really
> ugly on one line (requires 2.5 for if expression):
> 
> >>> list( itertools.ifilter( lambda listItem : True if len( list(
> itertools.takewhile( lambda test : not test, itertools.imap( lambda
> noShow: noShow in listItem, noShowList ) ) ) ) == len( noShowList) else
> False, myList ) )
> ['item four']
> 
> Which can be made to look much better by breaking the 'noShow in listItem'
> test out into a separate function, and does have the advantage that by
> using itertools.ifilter this is a lazy approach. There's got to be a
> better way to do the test to see if takewhile bailed early than using len,
> though.
> 
> ---------
> John Krukoff
> helot at comcast.net

Ah, yeah, any was the function I needed to simplify things and do the early
break. I really need to upgrade to 2.5.

>>> list( itertools.ifilter( lambda listItem : not any( itertools.imap(
lambda noShow: noShow in listItem, noShowList ) ), myList ) )
['item four']

Thanks Jason!

---------
John Krukoff
helot at comcast.net




From gmcalendar at gmail.com  Thu Aug 23 09:33:34 2007
From: gmcalendar at gmail.com (gmcalendar at gmail.com)
Date: Thu, 23 Aug 2007 13:33:34 -0000
Subject: simple spider in python
Message-ID: <1187876014.845912.236690@e9g2000prf.googlegroups.com>

Hi everybody, i'm new to the forum so: hello everybody (should I say
"world"?) ^_^
I'm trying to do a simple spider in python which:

1) ask google a query
2) parse the data

I'm a python newbie so *any* help would be very, very welcommed.
Thanks in advice!

cheers!



From beema.shafreen at gmail.com  Tue Aug 21 00:59:39 2007
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Tue, 21 Aug 2007 10:29:39 +0530
Subject: hi everybody
Message-ID: <aa405c1f0708202159g1e1a9a54o6d4006587f75fe44@mail.gmail.com>

hi everybody, i have  written to fetch the url, and accesstje nm and np
entries
my code:
import re
import urllib2
import time
Gene_id=raw_input("Please enter the gene_id:")
fh = urllib2.urlopen('
http://www.ncbi.nlm.nih.gov/sites/entrez?db=gene&cmd=search&term='+Gene_id)
for line in fh.readlines():
        pattern = re.compile('(NM_\d+.\d{0,5})</a>.*(NP_\d+.\d{0,5})</a>')
        m = pattern.search(line)
        if m:
                nm_entry = m.group(1)
                np_entry =  m.group(2)
                length = len(np_entry)
                #data = raw_input("There are %s entry, They are:" %(length))
                fh1 = urllib2.urlopen('
http://www.ncbi.nlm.nih.gov/entrez/viewer.fcgi?val='+nm_entry)
                for line1 in fh1.readlines():
                        p1 = re.compile('source\s*(\d{1}.*\d+)')
                        m1 = p1.search(line1)
                        if m1:
                                seq = m1.group(1)
                                seq_len = seq.split('..')
                                print nm_entry, 'Length of NM_seq:',
seq_len[1],np_entry


                fh1.close()
fh.close()
time.sleep(2)

in my result :
Please enter the gene_id:
(after this i want to get the text and data) eg., there are 11 entries  and
the nm and np entry the final print statement. i have include the
highlighted text in code where it is repeaded since inside the looping
please check about the following code and post your comments and where is
include the text to get the result properly
#data = raw_input("There are %s entry, They are:" %(length))



regards
shafreen
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From raims at dot.com  Mon Aug  6 22:30:27 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Tue, 7 Aug 2007 04:30:27 +0200
Subject: help with flexible decorators
References: <1186452596.052963.136840@e9g2000prf.googlegroups.com>
Message-ID: <1i2gkbz.p057tl1uhoy2iN%raims@dot.com>

james_027 <cai.haibin at gmail.com> wrote:
> While the enhance decorator work with functions of 1 argument, how do
> I make it to work with more than one arguments.

Using *args. Something like this:

def enhance(f):
    def _new(*args):
        return f(*args) + 1
    return _new

@enhance
def f(*args):
    return sum(args)

In [22]: f(6)
Out[22]: 7

In [23]: f(6, 4)
Out[23]: 11

In [24]: f(6, 4, 10)
Out[24]: 21


-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From devraj at gmail.com  Sun Aug 26 04:52:03 2007
From: devraj at gmail.com (Devraj)
Date: Sun, 26 Aug 2007 08:52:03 -0000
Subject: ActiveRecord for Python/MySQL
In-Reply-To: <far9ul$vb3$1@aioe.org>
References: <1188103880.146814.110780@q4g2000prc.googlegroups.com>
	<far9ul$vb3$1@aioe.org>
Message-ID: <1188118323.164567.6290@e9g2000prf.googlegroups.com>

Thanks

On Aug 26, 5:26 pm, EuGeNe Van den Bulke
<eugene.vandenbu... at gmail.com> wrote:
> Devraj wrote:
> > My application uses MySQL as a backend and am using the MySQL/Python
> > bindings. Are there any libraries that provide a database abstraction
> > layer like Activerecords for Python?'
>
> SQLObject
> SQLAclhemy
> DejaVu
> Storm
>
> Google for Python ORM you may find more!
>
> EuGeNe --http://www.3kwa.com




From exarkun at divmod.com  Fri Aug 10 06:52:13 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 10 Aug 2007 06:52:13 -0400
Subject: The Future of Python Threading
In-Reply-To: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
Message-ID: <20070810105213.4947.649573204.divmod.quotient.20843@ohm>

On Fri, 10 Aug 2007 10:01:51 -0000, "Justin T." <jmtulloss at gmail.com> wrote:
>Hello,
>
>While I don't pretend to be an authority on the subject, a few days of
>research has lead me to believe that a discussion needs to be started
>(or continued) on the state and direction of multi-threading python.
>
> [snip - threading in Python doesn't exploit hardware level parallelism
>  well, we should incorporate stackless and remove the GIL to fix this]
>

I think you have a misunderstanding of what greenlets are.  Greenlets are
essentially a non-preemptive user-space threading mechanism.  They do not
allow hardware level parallelism to be exploited.

In a hypothetical Python interpreter, equivalent to current CPython except
for the removal of the GIL, you could certainly have greenlets running in
different pthreads, and thus take care of hardware parallelism, but you
could do the same without greenlets too.

So Stackless Python is an unrelated matter.

>There has been much discussion on this in the past [2]. Those
>discussions, I feel, were premature. Now that stackless is mature (and
>continuation free!), Py3k is in full swing, and parallel programming
>has been fully realized as THE next big problem for computer science,
>the time is ripe for discussing how we will approach multi-threading
>in the future.

Many of the discussions rehash the same issues as previous ones.  Many
of them are started based on false assumptions or are discussions between
people who don't have a firm grasp of the relevant issues.

I don't intend to suggest that no improvements can be made in this area of
Python interpreter development, but it is a complex issue and cheerleading
will only advance the cause so far.  At some point, someone needs to write
some code.  Stackless is great, but it's not the code that will solve this
problem.

In the mean time, you might consider some multi-process solutions.  There
are a number of tools for getting concurrency like that.

Jean-Paul


From mccredie at gmail.com  Mon Aug 13 20:13:50 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Mon, 13 Aug 2007 17:13:50 -0700
Subject: AttributeError: 'module' object has no attribute 'HTTPSHandler'
In-Reply-To: <9e95df10708131712i7c27b200pdebd68a254e30537@mail.gmail.com>
References: <e04d2e90708100957t79ed5a72s259281d912508fc1@mail.gmail.com>
	<9e95df10708101153j74eb6431kd216503ab6c770ae@mail.gmail.com>
	<9e95df10708101352h45076f1cm36550126b1b548e3@mail.gmail.com>
	<e04d2e90708101549y50640f1aic067389992c6d73e@mail.gmail.com>
	<9e95df10708131712i7c27b200pdebd68a254e30537@mail.gmail.com>
Message-ID: <9e95df10708131713gb2f1873jd435362c19acae7c@mail.gmail.com>

>
> I am using Fedora Core 4 linux.  Where should I look for _ssl.pyd ? I
> am trying to build and use Python-2.5.1
>

I don't have access to that type of system. I do know that you need
OpenSSL to use ssl. It might be as simple as just finding and
installing OpenSSL for fedora. You can also find the source in the
python repository at:
http://svn.python.org/projects/external/openssl-0.9.8a

And build that yourself. I _think_ that if you have it installed,
configure might find it for you and autmatically build _ssl.pyd.

Matt


From jmtulloss at gmail.com  Fri Aug 10 17:51:50 2007
From: jmtulloss at gmail.com (Justin T.)
Date: Fri, 10 Aug 2007 21:51:50 -0000
Subject: The Future of Python Threading
In-Reply-To: <1i2njyp.1o6yslqe7ff47N%luc@honk-honk.com>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<1i2njyp.1o6yslqe7ff47N%luc@honk-honk.com>
Message-ID: <1186782710.600889.245930@j4g2000prf.googlegroups.com>

On Aug 10, 2:02 pm, l... at honk-honk.com (Luc Heinrich) wrote:
> Justin T. <jmtull... at gmail.com> wrote:
> > What these seemingly unrelated thoughts come down to is a perfect
> > opportunity to become THE next generation language.
>
> Too late: <http://www.erlang.org/>
>
> :)
>
> --
> Luc Heinrich

Uh oh, my ulterior motives have been discovered!

I'm aware of Erlang, but I don't think it's there yet. For one thing,
it's not pretty enough. It also doesn't have the community support
that a mainstream language needs. I'm not saying it'll never be
adequate, but I think that making python into an Erlang competitor
while maintaining backwards compatibility with the huge amount of
already written python software will make python a very formidable
choice as languages adapt more and more multi-core support. Python is
in a unique position as its actually a flexible enough language to
adapt to a multi-threaded environment without resorting to terrible
hacks.

Justin



From carsten at uniqsys.com  Fri Aug 24 14:54:26 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 24 Aug 2007 14:54:26 -0400
Subject: creating a tar file with python
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE2F1@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE2F1@efmailx>
Message-ID: <1187981666.3385.70.camel@dot.uniqsys.com>

On Fri, 2007-08-24 at 12:18 -0400, Brian McCann wrote:
> Ed, Carsten, Steve,
>  
> I don?t care if  Steve Holden is the python God himself,
> He's a rude, arrogant, vulgar human who shows his true level
> of intellect by his use of profanity

That is your opinion of Steve, and you are entitled to your opinion.
Those of us who have known him longer have a very different opinion of
him.

You are coming off as a disrespectful, clueless, mindless, thankless,
spoiled brat. I'm not saying that that's what you are in real life.
You're probably a nice person to work with in real life. I'm just
pointing out what kind of opinion one might form of you based on your
output on this thread.

Now, please, let's all take a deep breath, calm down, and keep in mind
that we are all human beings, we make mistakes, and we all have feelings
that can get hurt. Most importantly, let's keep in mind that the limited
medium of an Internet mailing list paints a very skewed picture of who
we are, and we should give each other the benefit of the doubt as much
as possible. Ultimately, we're all here to talk about Python and help
each other out.

Thanks for listening. Peace,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From sundol at sfc.keio.ac.jp  Mon Aug 20 03:02:23 2007
From: sundol at sfc.keio.ac.jp (Hyunchul Kim)
Date: Mon, 20 Aug 2007 16:02:23 +0900
Subject: How to decompress .Z file?
Message-ID: <1187593343.30969.4.camel@hckim-desktop>

Hi, all

How can .Z file be decompressed?

According to python library reference, .Z file might not be supported by
python, yet.

Best,
Hyunchul Kim


From Dominic at PLEASEASK.co.uk  Tue Aug 14 09:14:45 2007
From: Dominic at PLEASEASK.co.uk (special_dragonfly)
Date: Tue, 14 Aug 2007 14:14:45 +0100
Subject: Class problems.
References: <46c1a34a$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <46c1a6ec$0$11684$7b0f0fd3@mistral.news.newnet.co.uk>

Just ignore this, I was being an idiot...

"special_dragonfly" <Dominic at PLEASEASK.co.uk> wrote in message 
news:46c1a34a$0$54289$7b0f0fd3 at mistral.news.newnet.co.uk...
> Hello,
> I'm having problems retrieving data I think I've put into my program. I 
> have a class and a function. I'm reading in from a personally made text 
> file of the data needed for the class. The FieldsDictionary needs to be 
> accesable outside the function, but my problem is this:
> the print FieldsDictionary[key].Fieldname (which I should have just 
> created because of the line above), returns:
> AttributeError: 'list' object has no attribute 'Fieldname'
> am I just accessing it wrongly?
> I was under the impression that Fields Dictionary should contain a key 
> referencing to a list of instances of the class. i.e. 
> FieldsDictionary{key:[instance1, instance2, instance 3]}
> Is this not what I've programmed?
>
> class FieldClass(object):
>    def 
> __init__(self,Fieldname="",Fieldlength=0,Type=["A","S","N"],Location=["D","C","L","H","TBA"]):
>        self.Fieldname=Fieldname
>        self.Fieldlength=Fieldlength
>        self.Type=Type
>        self.Location=Location
>
> def 
> EnterDictionary(FieldsDictionary,key,myfile,FIELD_QUANTITY_OFFSET,LINE_START,LINE_END):
>    data=myfile.readline().strip()
>    for i in range(int(data[FIELD_QUANTITY_OFFSET:])):
>        args =myfile.readline().strip()[LINE_START:LINE_END].split(",")
>        print args
>        FieldsDictionary.setdefault(key, []).append(FieldClass(*args))
>        print FieldsDictionary[key].Fieldname
> 




From kyosohma at gmail.com  Sun Aug 12 21:11:44 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 13 Aug 2007 01:11:44 -0000
Subject: Hex editor - Python beginner's code open to review
In-Reply-To: <f9jasr021hs@news1.newsguy.com>
References: <f9jasr021hs@news1.newsguy.com>
Message-ID: <1186967504.796928.264650@l22g2000prc.googlegroups.com>

On Aug 10, 10:36 pm, CC <cr... at BOGUS.sbcglobal.net> wrote:
> Hi:
>
> http://web.newsguy.com/crcarl/python/hexl.py
>
> This is my first Python program other than tutorial code snippet
> experimentation.  I chose a hex line editor.  I may do a hex screen
> editor once this is done, if I feel like playing with the curses module.
>   Or move straight to wxPython.
>
> This is unfinished, and is really just a hex viewer at this point.  It
> seems like a good point to stop and see what others think.  I would be
> interested to hear any comments.
>
> My command parsing if of course crude, brute-force, and not very
> scalable.  I am doing some reading on this subject, and will be trying
> to do a more generalized approach in the next revision.  This is going
> to be a subject where I need to learn a lot, because I have 2-3
> embedded applications in C that need varying levels of command parsers,
> so I will be seeking to improve this skill considerably.
>
> Thanks for input.
>
> --
> _____________________
> Christopher R. Carlen
> cr... at bogus-remove-me.sbcglobal.net
> SuSE 9.1 Linux 2.6.5

Looks like mostly clean code to me. I don't understand why you declare
"Offset" globally twice. Wouldn't it make more sense to just stick it
at the top of the file like your "Hexdigits" variable? I'm also not
sure if your style follows the style guide...then again, mine probably
doesn't either. You can check it out here though:

http://www.python.org/doc/essays/styleguide.html

Rather than using if/else statements for error checking, you may want
to consider using try/except:

http://docs.python.org/tut/node10.html

That my 2?!

Mike



From wegwerp at gmail.com  Wed Aug 15 10:53:58 2007
From: wegwerp at gmail.com (Bas)
Date: Wed, 15 Aug 2007 14:53:58 -0000
Subject: FM synthesis using Numpy
In-Reply-To: <mailman.1990.1187134824.22759.python-list@python.org>
References: <mailman.1990.1187134824.22759.python-list@python.org>
Message-ID: <1187189638.121287.311030@k79g2000hse.googlegroups.com>

You got your math wrong. What you are calculating is:
sin(2*pi*(1000+15*sin(2*pi*6*t))*t) = sin(2*pi*1000*t +
2*pi*15*sin(2*pi*6*t)*t)
The 'instantaneous frequency' can be calculated by differentiating the
argument of the sine and dividing by 2pi:
x = sin(phi(t)) -> f_inst = d (phi(t)) / dt / (2*pi)
So in your case:
f_inst = 1000 + 15*sin(2*pi*6*t) + 2*pi*t*6*15*cos(2*pi*6*t)
the last term explains the effect you hear.

What you want is:
f_inst = f0 + df*cos(2*pi*fm*t)
Integrating this and multiplying by 2pi gives the phase:
phi(t) = 2*pi*f0*t + sin(2*pi*fm*t)*df/fm

So you can achieve the frequency modulation by using phase modulation
(these two are related). You can do this with your own code by

phi = oscillator(t, freq=6, amp=15/6)
tone = oscillator(t, freq=1000, amp=0.1, phase=phi)

cheers,
Bas



From grante at visi.com  Fri Aug 31 13:33:25 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 31 Aug 2007 17:33:25 -0000
Subject: low level ethernet device access in linux
References: <mailman.223.1188580797.28954.python-list@python.org>
Message-ID: <13dgk75erohnta9@corp.supernews.com>

On 2007-08-31, Tom Brown <brown at esteem.com> wrote:

> I understand that I am getting this error because I am running
> the application as a user and not as root. I would like to be
> able to run this app. as a user. Is there a way to create a
> socket without running the app. as root or sudo?

Yes.

According to the raw(7) man page:

   ERRORS

      EPERM The user doesn't have permission to open raw
            sockets.  Only pro- cesses with a effective user
            ID of 0 or the CAP_NET_RAW attribute may do that.

Anticipating your next question:

 $ man capabilities

-- 
Grant Edwards                   grante             Yow! Well, I'm INVISIBLE
                                  at               AGAIN ... I might as well
                               visi.com            pay a visit to the LADIES
                                                   ROOM ...


From ninja.krmenadl at nes.com  Mon Aug 20 10:16:44 2007
From: ninja.krmenadl at nes.com (Boris Ozegovic)
Date: Mon, 20 Aug 2007 16:16:44 +0200
Subject: I Need help from all the group participants
Message-ID: <fac7nj$ci9$1@localhost.localdomain>

Hi, 

I am working on some system, and the communication will take place through
the chatterbot which will be written in AIML (interpreter is written in
Python).  English is not my mother tongue, so I need huge favor:  if all of
you can write two sentences, so that I could have greater pattern base.
The first sentence is finding someone's heart rate, example: "Please, can
you tell me John's heart rate", and the other one is setting the alarm when
someone's heart rate is lower then x, and greater than y, example: "Can
you, please, send me information when John's heart rate is lower than 60,
and greater than 100".  You can manipulate time (right now, now, right this
moment), and everything else you can think about.    

-- 
Ne dajte da nas la?ljivac Bandi? truje:
http://cnn.blog.hr/arhiva-2007-06.html#1622776372


From laurent.pointal at limsi.fr  Fri Aug 31 03:03:45 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 31 Aug 2007 09:03:45 +0200
Subject: Coding Standards
In-Reply-To: <1188540331.961231.36850@r23g2000prd.googlegroups.com>
References: <1188540331.961231.36850@r23g2000prd.googlegroups.com>
Message-ID: <fb8egh$2h0$1@news2.u-psud.fr>

davidsamith at gmail.com a ?crit :
> 'Good code' is code that works, is bug free, and is readable and
> maintainable. Standards need to be followed for coding. Read more...
> 
> http://brsx.co.uk/SWtesting/FAQs/FAQs012.asp

You misstyped your URL and referenced a C++ related document, for Python 
its here:

http://www.python.org/dev/peps/pep-0008/

;-)


From conra2004 at yahoo.com  Fri Aug 17 07:57:47 2007
From: conra2004 at yahoo.com (yadin)
Date: Fri, 17 Aug 2007 04:57:47 -0700
Subject: passing variables and values to texboxdisplays
Message-ID: <1187351867.699825.91860@57g2000hsv.googlegroups.com>

hi!
Can any one tell me why is it that i can't see my second frame and why
is the value of freq not Appended in the First frame ...thanks
I know it is wx python  but it has to do with passing variables.thanks

import wx

def create(parent):
    return Frame1(parent)

[wxID_FRAME1, wxID_FRAME1FREQ, wxID_FRAME1FREQDISP,
wxID_FRAME1STATICTEXT1,
] = [wx.NewId() for _init_ctrls in range(4)]

class Frame1(wx.Frame):
    def _init_ctrls(self, prnt):
        # generated method, don't edit
        wx.Frame.__init__(self, id=wxID_FRAME1, name='', parent=prnt,
              pos=wx.Point(380, 179), size=wx.Size(241, 133),
              style=wx.DEFAULT_FRAME_STYLE, title='Frame1')
        self.SetClientSize(wx.Size(233, 99))

        self.staticText1 = wx.StaticText(id=wxID_FRAME1STATICTEXT1,
              label='frequency disp', name='staticText1', parent=self,
              pos=wx.Point(24, 32), size=wx.Size(71, 13), style=0)

        self.freqdisp = wx.TextCtrl(id=wxID_FRAME1FREQDISP,
name='freqdisp',
              parent=self, pos=wx.Point(104, 24), size=wx.Size(100,
21),
              style=0, value='')

        self.freq = wx.Button(id=wxID_FRAME1FREQ, label='get freq',
name='freq',
              parent=self, pos=wx.Point(24, 56), size=wx.Size(184,
23),
              style=0)
        self.freq.Bind(wx.EVT_BUTTON, self.OnButton1Button,
id=wxID_FRAME1FREQ)

    def __init__(self, parent):
        self._init_ctrls(parent)

    def OnButton1Button(self, event):

        def create(parent):
            return Frame2(parent)
        [wxID_FRAME2, wxID_FRAME2FREQ, wxID_FRAME2FREQDISP,
wxID_FRAME2STATICTEXT1,] = [wx.NewId() for _init_ctrls in range(4)]

        class Frame2:
            def __init__(self):
                #
                wx.Frame.__init__(self, id=wxID_FRAME2, name='',
parent=prt,
                      pos=wx.Point(400, 179), size=wx.Size(300, 133),
                      style=wx.DEFAULT_FRAME_STYLE, title='Frame2')
                self.SetClientSize(wx.Size(233, 99))

                self.staticText1 =
wx.StaticText(id=wxID_FRAME2STATICTEXT1,
                      label='frequency goes here first',
name='staticText2', parent=self,
                      pos=wx.Point(24, 32), size=wx.Size(71, 13),
style=0)

                self.freqdisp2 = wx.TextCtrl(id=wxID_FRAME2FREQDISP,
name='freqdisp2',
                      parent=self, pos=wx.Point(104, 24),
size=wx.Size(100, 21),
                      style=0, value=' ')

                self.freq = wx.Button(id=wxID_FRAME2FREQ, label='get
freq', name='freq',
                      parent=self, pos=wx.Point(24, 56),
size=wx.Size(184, 23),
                      style=0)
                self.freq.Bind(wx.EVT_BUTTON, self.OnButton2Button,
id=wxID_FRAME2FREQ)

            def __init__(self, parent):
                self._init_ctrls(parent)
            def OnButton2Button(self, event):
                freqdisp.Append('this is it 24HZ!')



if __name__ == '__main__':
    app = wx.PySimpleApp()
    frame = create(None)
    frame.Show()

    app.MainLoop()



From gerdusvanzyl at gmail.com  Sat Aug 25 09:38:42 2007
From: gerdusvanzyl at gmail.com (Gerdus van Zyl)
Date: Sat, 25 Aug 2007 13:38:42 -0000
Subject: pure python gaussian blur
In-Reply-To: <mailman.1977.1187112429.22759.python-list@python.org>
References: <1187108679.401416.224060@19g2000hsx.googlegroups.com>
	<mailman.1977.1187112429.22759.python-list@python.org>
Message-ID: <1188049122.152639.26060@q3g2000prf.googlegroups.com>

Ok, now answering my own question :-)
Gaussian blurs can be optimized by seperating the equation and
applying in two passes.
I also implemented a version using State Vector Machines from www-
personal.engin.umd.umich.edu/~jwvm/ece581/21_GBlur.pdf but it does not
produce correct results. Most probably my fault, but it is 4x faster.
(code available on request)

Then after all this i learnt that using multiple box blurs approximate
a gaussian blur within 3%. This is the solution i use now and is fast
enough for my needs and in pure python.

Code for gaussian blur and box blur below.

~Gerdus van Zyl

Seperated Gaussian blur:

    def blurB(self):

        pixels = self.array
        temp1 = copy.copy(pixels)
        #temp2 = copy.copy(pixels)
        stride = self.width * 4

        clr = array.array('B',[255,255,255,255])

        w = self.width
        h = self.height

        def pascal(n):
            """Prints n first lines of Pascal`s triangle

            author: DR#m <dnpsite.narod.ru>
            last rev 20.03.05"""
            #n += 1

            l=[1]
            p=[]
            for i in xrange(n):
                l2=[1]
                for j in xrange(len(l)-1):
                    l2.append(l[j]+l[j+1])
                l2.append(1)
                #print l
                l=l2
            return l


        N = 5
        g = pascal(N)
        print '>',g

        gauss_fact = g
        #gauss_fact = [1,2,1]
        #gauss_fact = [1,1]
        gauss_width  = len(gauss_fact)
        s = 0
        for n in gauss_fact:
            s += n
        gauss_sum = s



        print "Pass01"
        for i in range(1,w-1):
            #print i," of ",w
            for j in range(1,h-1):
                sumr=0
                sumg=0
                sumb=0
                for k in range(0,gauss_width):
                    x = i-((gauss_width-1)>>1)+k
                    y = j
                    offset = y * stride + x * 4
                    pixel = pixels[offset:offset
+4]

                    r = pixel[0]
                    g = pixel[1]
                    b = pixel[2]

                    sumr+=r*gauss_fact[k]
                    sumg+=g*gauss_fact[k]
                    sumb+=b*gauss_fact[k]

                    clr[0] = sumr/gauss_sum
                    clr[1] = sumg/gauss_sum
                    clr[2] = sumb/gauss_sum

                    x = i
                    y = j
                    offset = y * stride + x * 4
                    temp1[offset:offset+4] =
clr

        print "Pass02"
        for i in range(1,w-1):
            #print i," of ",w
            for j in range(1,h-1):
                sumr=0
                sumg=0
                sumb=0
                for k in range(0,gauss_width):
                    x = i-((gauss_width-1)>>1)+k
                    y = j

                    offset = y * stride + x * 4
                    pixel = temp1[offset:offset+4]

                    r = pixel[0]
                    g = pixel[1]
                    b = pixel[2]

                    sumr+=r*gauss_fact[k]
                    sumg+=g*gauss_fact[k]
                    sumb+=b*gauss_fact[k]

                clr[0] = sumr/gauss_sum
                clr[1] = sumg/gauss_sum
                clr[2] = sumb/gauss_sum

                self.setPixel(i,j,clr) #to temp1


Box Blur:
    def _boxBlur(self):

        N = 5
        xsum = 0
        xsumar = []
        pixels = self.array
        opixels = copy.copy(pixels)

        stride = self.width * 4

        clr = array.array('B',[255,255,255,255])

        w = self.width
        h = self.height

        pixel = 0

        for rgb in [0,1,2]:
            for x in range(0,w):
                #print i," of ",w
                for y in range(0,h):

                    hN = N/2
                    offset = (y-hN) * stride + (x-hN) * 4
                    if offset < 0: offset = 0
                    pixel = pixels[offset+rgb]

                    xsumar.append(pixel)

                    if len(xsumar) > N:
                        xsumar = xsumar[-N:]

                    xsum = 0
                    for v in xsumar:
                        xsum += v

                    xsum /= len(xsumar)

                    pixels[offset+rgb] = xsum
        #x
        for rgb in [0,1,2]:
            for y in range(0,h):
                #print i," of ",w
                for x in range(0,w):

                    hN = N/2
                    offset = (y-hN) * stride + (x-hN) * 4
                    if offset < 0: offset = 0
                    pixel = pixels[offset+rgb]

                    xsumar.append(pixel)

                    if len(xsumar) > N:
                        xsumar = xsumar[-N:]

                    xsum = 0
                    for v in xsumar:
                        xsum += v

                    xsum /= len(xsumar)

                    pixels[offset+rgb] = xsum



From jmtulloss at gmail.com  Fri Aug 10 12:52:23 2007
From: jmtulloss at gmail.com (Justin T.)
Date: Fri, 10 Aug 2007 16:52:23 -0000
Subject: The Future of Python Threading
In-Reply-To: <mailman.1826.1186743471.22759.python-list@python.org>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<mailman.1826.1186743471.22759.python-list@python.org>
Message-ID: <1186764743.225475.241870@q3g2000prf.googlegroups.com>

On Aug 10, 3:57 am, Steve Holden <st... at holdenweb.com> wrote:
> Justin T. wrote:
> > Hello,
>
> > While I don't pretend to be an authority on the subject, a few days of
> > research has lead me to believe that a discussion needs to be started
> > (or continued) on the state and direction of multi-threading python.
> [...]
> > What these seemingly unrelated thoughts come down to is a perfect
> > opportunity to become THE next generation language. It is already far
> > more advanced than almost every other language out there. By
> > integrating stackless into an architecture where tasklets can be
> > divided over several parallelizable threads, it will be able to
> > capitalize on performance gains that will have people using python
> > just for its performance, rather than that being the excuse not to use
> > it.
>
> Aah, the path to world domination. You know you don't *have* to use
> Python for *everything*.
>
True, but Python seems to be the *best* place to tackle this problem,
at least to me. It has a large pool of developers, a large standard
library, it's evolving, and it's a language I like :). Languages that
seamlessly support multi-threaded programming are coming, as are
extensions that make it easier on every existent platform. Python has
the opportunity to lead that change.

>
> Be my guest, if it's so simple.
>
I knew somebody was going to say that! I'm pretty busy, but I'll see
if I can find some time to look into it.

>
> I doubt that a thread on c.l.py is going to change much. It's the
> python-dev and py3k lists where you'll need to take up the cudgels,
> because I can almost guarantee nobody is going to take the GIL out of
> 2.6 or 2.7.
>

I was hoping to get a constructive conversation on what the structure
of a multi-threaded python would look like. It would appear that this
was not the place for that.

> Is it even possible
> to run threads of the same process at different priority levels on all
> platforms?
No, it's not, and even fewer allow the scheduler to change the
priority dynamically. Linux, however, is one that does.



From bdesth.quelquechose at free.quelquepart.fr  Thu Aug  2 11:03:29 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 02 Aug 2007 17:03:29 +0200
Subject: i am new to python-Please somebody help
In-Reply-To: <1186063842.827016.95030@q3g2000prf.googlegroups.com>
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com>
	<pan.2007.08.02.12.51.13.363293@REMOVE.THIS.cybersource.com.au>
	<1186063842.827016.95030@q3g2000prf.googlegroups.com>
Message-ID: <46b249a4$0$31219$426a74cc@news.free.fr>

gregarican a ?crit :
(snip)
> This link answers my question --> http://www.google.com/search?hl=en&q=Python+list+rudeness.

I seriously don't think that this newsgroup can be qualified as "rude" 
(and I'm possibly one of the "rudest" persons here). Compared to most 
comp.* newsgroup, Python is certainly one of the most tolerant and 
newbie-friendly around - and quite a lot of newcomers say so. FWIW, even 
FAQs, RTFMs or STFWs are usually expressed in a mostly polite way, and 
almost always with links and pointers (and FWIW, it's the case here).

> Honestly, I have developed in both Ruby and Python for years now and
> have consistently found that the Ruby community if more newbie-
> friendly than Python's.

I spent sometimes lurking on c.l.ruby and didn't find it *that* 
friendly. Not more than c.l.py at least, and certainly less respectful 
of peoples coming from other languages...

Now if you want some examples of definitively "rude" newsgroups, I 
suggest you take your chance on other newsgroups in the comp.* 
hierarchy...


From hyugaricdeau at gmail.com  Wed Aug 29 09:25:07 2007
From: hyugaricdeau at gmail.com (Hyuga)
Date: Wed, 29 Aug 2007 13:25:07 -0000
Subject: self extracting zipefile (windows) and (standard module) zipefile
In-Reply-To: <1188388421.010643.19050@50g2000hsm.googlegroups.com>
References: <1188388421.010643.19050@50g2000hsm.googlegroups.com>
Message-ID: <1188393907.080206.246270@y42g2000hsy.googlegroups.com>

First of all, there's really no such thing as a "self extracting
zipefile".  I mean, obviously you have to do something to unzip it.  A
file doesn't just execute itself.  What you're dealing with is not a
_zip file_.  It's an executable that has a zip file bundled with it,
and the code to unzip it, most likely into your current directory
(though some such executables allow you to provide a path to unzip
to).  You'll have to execute it--there's no way you can operate on it
like a normal zip file.

On Aug 29, 7:53 am, Werner <Werner.Me... at fujitsu-siemens.com> wrote:
> Hi,
>
> I try to read (and extract) some "self extracting" zipefiles on a
> Windows system. The standard module zipefile seems not to be able to
> handle this.
>
> >>> fName = r"C:\tmp\mySelfExtratingFile.exe"
> >>> import zipfile
> >>> zipefile.is_zipfile(fName))
>
> False
>
> Is there a wrapper or has some one experience with other libaries to
> extract those files?
>
> Thanks in advance
> Werner



From zyzhu2000 at gmail.com  Fri Aug 17 09:41:57 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Fri, 17 Aug 2007 13:41:57 -0000
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <mailman.2104.1187336977.22759.python-list@python.org>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<mailman.2104.1187336977.22759.python-list@python.org>
Message-ID: <1187358117.200341.270960@r23g2000prd.googlegroups.com>

On Aug 17, 2:35 am, S?bastien Buchoux <seb.buch... at gmail.com> wrote:
> beginner a ?crit :
>
>
>
> > Hi All.
>
> > I'd like to do the following in more succint code:
>
> > if k in b:
> >     a=b[k]
> > else:
> >     a={}
> >     b[k]=a
>
> > a['A']=1
>
> > In perl it is just one line: $a=$b->{"A"} ||={}.
>
> > Thanks,
> > Geoffrey
>
> One solution I often use in such cases:
>
> try:
>     a = b[k]
> except KeyError: #or except IndexError: if b is a list/tuple and not a dict
>     a = {}
>     b[k] = a
>
> a['A'] = 1
>
> Indeed, exceptions are handled faster than "if/else" loops. As it was
> mentionned earlier, One neat solution in Perl may not be the perfect one
> in Python.
>
> Cheers,
>
> S?bastien- Hide quoted text -
>
> - Show quoted text -

Wow. This solution is interesting. I'll try this. Thanks.



From airconditi at gmail.com  Tue Aug  7 15:46:51 2007
From: airconditi at gmail.com (airconditi at gmail.com)
Date: Tue, 07 Aug 2007 12:46:51 -0700
Subject: Tuning - Styling
Message-ID: <1186516011.575543.88670@22g2000hsm.googlegroups.com>

Cool cars, tuning & styling, here you can find many tuned cars with
tons of pictures!!!!!!!

http://tuning-styling.blogspot.com/



From antroy at gmail.com  Wed Aug 15 07:08:53 2007
From: antroy at gmail.com (Ant)
Date: Wed, 15 Aug 2007 04:08:53 -0700
Subject: creating and appending to a dictionary of a list of lists
In-Reply-To: <1187145044.394889.312590@x35g2000prf.googlegroups.com>
References: <1187145044.394889.312590@x35g2000prf.googlegroups.com>
Message-ID: <1187176133.986004.213880@a39g2000hsc.googlegroups.com>

On Aug 15, 3:30 am, pyscottish... at hotmail.com wrote:
> Hey,
>
> I started with this:
>
> factByClass = {}
>
...
> def update(key, *args):
>     x = factByClass.setdefault(key, [[], [], [], [] ])
>     for i, v in enumerate(args):
>         x[i].append(v)
>
> Is there a better way?

Well, the following is perhaps neater:

>>> factByClass = defaultdict(lambda: [[],[],[],[]])
>>> def update(key, *args):
...   map(list.append, factByClass[key], args)
...
>>> update('one', 1, 2, 3, 4)
>>> update('one', 5, 6, 7, 8)
>>> update('two', 9, 10, 11, 12)
>>>
>>> print factByClass
defaultdict(<function <lambda> at 0x00F73430>, {'two': [[9], [1
0], [11], [12]], 'one': [[1, 5], [2, 6], [3, 7], [4, 8]]})

It abuses the fact that list.append modifies the list in place -
normally you would use map to get a new list object. In this case the
new list returned by map is just a list of None's (since append
returns None - a common idiom for functions that operate by side
effect), and so is not used directly.

--
Ant...

http://antroy.blogspot.com/





From laurent.pointal at limsi.fr  Tue Aug 28 02:54:59 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 28 Aug 2007 08:54:59 +0200
Subject: SCF released to GPL
In-Reply-To: <zHLAi.102$7P7.54@newssvr19.news.prodigy.net>
References: <ZBnAi.21498$eY.43@newssvr13.news.prodigy.net>
	<46d29a6c$0$27404$ba4acef3@news.orange.fr>
	<zHLAi.102$7P7.54@newssvr19.news.prodigy.net>
Message-ID: <fb0gs3$g8n$2@news2.u-psud.fr>

hg a ?crit :
> 2) I'm desperately searching for the French NG from my client but cannot 
> find it ... any clue ? Maybe you can pass the message ?

Done.

See 
http://groups.google.com/group/fr.comp.lang.python/browse_frm/thread/fa4474921f77b1be/8d6150d502447510#8d6150d502447510



From indu_shreenath at yahoo.co.in  Fri Aug 10 05:00:28 2007
From: indu_shreenath at yahoo.co.in (indu_shreenath at yahoo.co.in)
Date: Fri, 10 Aug 2007 02:00:28 -0700
Subject: how to get output.
In-Reply-To: <46BB64B6.1000303@websafe.com>
References: <mailman.1777.1186641317.22759.python-list@python.org>
	<5hvrhhF3m15c7U1@mid.uni-berlin.de>
	<1186645852.687961.323420@x35g2000prf.googlegroups.com>
	<1186646135.742185.5280@x35g2000prf.googlegroups.com>
	<46BB64B6.1000303@websafe.com>
Message-ID: <1186736428.586532.265680@e16g2000pri.googlegroups.com>

On Aug 10, 12:02 am, Larry Bates <larry.ba... at websafe.com> wrote:
> indu_shreen... at yahoo.co.in wrote:
> > I corrected a typ below.
>
> > On Aug 9, 12:50 pm, indu_shreen... at yahoo.co.in wrote:
> >> Hey,
>
> >> I did write the following:
> >> but it does not work.
>
> >> import subprocess as sp
> >> try:
> >>     p = sp.Popen("DIR . /AD /B", stdout=sp.PIPE)
> >>     result = p.communicate()[0]
> >>     print result
> >>  except:
> >>      print "error"
>
> >> This throws error.
> >> DIR . /AD /B will list out only directories in the current directory.
>
> >> Thanks,
> >> Indu
>
> >> On Aug 9, 11:46 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> >>> indu_shreenath schrieb:
> >>>> Hey,
> >>>> I want to get the output of "DIR /AD /B" command to a varriable using
> >>>> python. How can I do this?
> >>> Using the subprocess-module.
> >>> However, I'm not sure what DIR /AD /B does - but there are many
> >>> functions in module os that might deliver what you want without invoking
> >>> an external command.
> >>> Diez- Hide quoted text -
> >> - Show quoted text -
>
> That is better done in python with:
>
> import os
> dirs=[d for d in os.listdir(os.curdir) if os.path.isdir(d)]
>
> or
>
> dirs=filter(os.path.isdir, os.listdir(os.curdir))
>
> -Larry- Hide quoted text -
>
> - Show quoted text -

Thanks I could implement it.

Indu





From enleverlesX.XmcX at XmclaveauX.com  Mon Aug 27 14:03:23 2007
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI (MVP))
Date: Mon, 27 Aug 2007 20:03:23 +0200
Subject: How to free memory ( ie garbage collect) at run time with Python
	2.5.1(windows)
References: <1188224306.863247.127890@50g2000hsm.googlegroups.com>
	<mn.dbf07d78329985f0.46195@XX.XmclaveauX.com>
Message-ID: <46d31272$0$25942$ba4acef3@news.orange.fr>

A?e!

gmail said :  "illegal attachment"   (because  .exe?)
I will try to send a zipped-file...

@+

Michel Claveau




From michele.simionato at gmail.com  Fri Aug 31 05:31:05 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Fri, 31 Aug 2007 09:31:05 -0000
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188547369.428712.194430@x35g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<1188547369.428712.194430@x35g2000prf.googlegroups.com>
Message-ID: <1188552665.363115.175310@x35g2000prf.googlegroups.com>

On Aug 31, 10:02 am, Russ <uymqlp... at sneakemail.com> wrote:
>
> Hi Alex. I've always enjoyed your Piggies talks at
> Google (although I missed he last one because I was out
> of town). I'm disappointed to see that you seem to have
> taken personal offense from remarks I made to someone else who
> attacked me first.

I am curious. Why do you think I attacked you? The conversion went as
follows:

> On Aug 29, 7:21 am, Russ <uymqlp... at sneakemail.com> wrote:
>> Thanks for that information. That's too bad, because it seems like a
>> strong positive capability to add to Python. I wonder why the cold
>> reception. Were there problems with the idea itself or just the
>> implementation? Or is it just a low priority?

> me:
> Why do you think that would ad a strong positive capability?
> To me at least it seems a big fat lot of over-engineering, not
> needed in 99% of programs. In the remaining 1%, it would still not
> be needed since Python provides out of the box very powerful
> metaprogramming capabilities so that you can implement
> yourself the checks you need, if you really need them.

Basically you said "I think DbC is good" and I said "I don't think
so".
I would not call that an attack. If you want to see an attack, wait
for
Alex replying to you observations about the low quality of code at
Google! ;)

       Michele Simionato



From horpner at yahoo.com  Wed Aug  1 12:27:02 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 01 Aug 2007 16:27:02 GMT
Subject: Python end of file marker similar to perl's __END__
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
	<1185976656.753817.27980@x40g2000prg.googlegroups.com>
	<slrnfb17m5.224.horpner@FIAD06.norwich.edu>
	<eml6o4-tvd.ln1@lairds.us>
Message-ID: <qv2si.37263$G23.1227@newsreading01.news.tds.net>

On 2007-08-01, Cameron Laird <claird at lairds.us> wrote:
> In article <slrnfb17m5.224.horpner at FIAD06.norwich.edu>,
> Neil Cerutti  <horpner at yahoo.com> wrote:
>>On 2007-08-01, beginner <zyzhu2000 at gmail.com> wrote:
>>> Thanks everyone for responding. It doesn't look like python has
>>> it. I would definitely miss it. As Steve said, the nice thing
>>> about __END__ is that things below __END__ do not have to have
>>> legit syntax. That let me focus on the lines of code I am
>>> debugging and do not have to worry about some bad syntax down
>>> the line. This feature is especially handy if I am, saying,
>>> replacing modoules or changing data structures.
>>
>>A C-like trick might be helpful while refactoring:
>>
>><working code>
>>if False:
>>   <non-working code>
>>
>>You have to indent all the non-working code by one level, but
>>with a good editor that's a snap.
>>
>>Python will still parse the following lines (it must be valid
>>Python syntax), but the resulting parse tree won't be executed.
> 			.
> 			.
> 			.
> I want to re-emphasize the "triple-quote it" tip mentioned
> earlier in this thread.  I think the original questioner
> will find this quite satisfying, if I understand his situ-
> ation at all.
>
> *I* certainly have source code with embedded "junk" 
> commented out as multi-line strings.

I used to do that, but now that I use doctests so much it's
infeasible to comment out arbitrary code that way, since they
can't necessarily nest.

But Diez suggestion is even easier than the if False suggestion I
made.

-- 
Neil Cerutti



From mhearne808 at gmail.com  Fri Aug 31 09:47:02 2007
From: mhearne808 at gmail.com (mhearne808[insert-at-sign-here]gmail[insert-dot-here]com)
Date: Fri, 31 Aug 2007 06:47:02 -0700
Subject: fcntl problems
In-Reply-To: <mailman.186.1188541398.28954.python-list@python.org>
References: <1188512377.441241.107900@q4g2000prc.googlegroups.com>
	<1188515889.352267.220790@q5g2000prf.googlegroups.com>
	<mailman.186.1188541398.28954.python-list@python.org>
Message-ID: <1188568022.988154.188230@y42g2000hsy.googlegroups.com>

On Aug 31, 12:23 am, Miles <semantic... at gmail.com> wrote:
> Sorry, that last quote-only reply was accidental. :)
>
> On 8/30/07, mhearne808 wrote:
> > I've been doing some experiments, and here are some specific examples
> > to try.
>
> [snipped examples]
>
> > From these last two experiments I can only conclude that file locking
> > isn't doing a durned thing.
>
> > What's going on?
>
> File locking isn't doing a durned thing in those cases because you're
> only obtaining the lock from a single process.
>
> > According to my Python Cookbook:
> > "Exclusive lock: This denies all _other_ processes both read and write
> > access to the file."
>
> This is only for mandatory locking; POSIX flock is advisory locking,
> which states: "Only one process may hold an exclusive lock for a given
> file at a given time."  Advisory locks don't have any effect on
> processes that don't use locks.  Mandatory locks are kernel enforced,
> but non-POSIX and not available in Mac OS X.
>
> -Miles

I think I'm still confused.  Maybe I should explain the behavior that
I want, and then figure out if it is possible.

I have a script that will be run from a cron job once a minute.  One
of the things this script will do is open a file to stash some
temporary results.  I expect that this script will always finish its
work in less than 15 seconds, but I didn't want to depend on that.
Thus I started to look into file locking, which I had hoped I could
use in the following fashion:

Process A opens file foo
Process A locks file foo
Process A takes more than a minute to do its work
Process B wakes up
Process B determines that file foo is locked
Process B quits in disgust
Process A finishes its work

Since I couldn't figure out file locking, I decided to just have
Process A create a "pid" file in the directory - analogous to the
"Occupied" sign on an airplane bathroom.  This works, but it seems a
little hacky.

--Mike



From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Thu Aug  2 12:54:45 2007
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J. Fromberger)
Date: Thu, 02 Aug 2007 12:54:45 -0400
Subject: a dict trick
References: <1186036331.304916.304020@e9g2000prf.googlegroups.com>
Message-ID: <Michael.J.Fromberger-09FEF9.12544502082007@localhost>

In article <1186036331.304916.304020 at e9g2000prf.googlegroups.com>,
 james_027 <cai.haibin at gmail.com> wrote:

> hi
> 
> for example I have this dictionary
> 
> dict = {'name':'james', 'language':'english'}
> 
> value = 'sex' in dict and dict['sex'] or 'unknown'
> 
> is a right pythonic of doing this one? I am trying to get a value from
> the dict, but if the key doesn't exist I will provide one.

Hi, James,

You might prefer:

  d = {'name': 'James', 'language': 'English'}

  value = d.get('sex', 'unknown')

This accomplishes what your above code does, using a method of the 
built-in dict object.

If you also wish to ADD the new value to the dictionary, you may also 
use the following:

  value = d.setdefault('sex', 'unknown')

This returns the same value as the above, but also adds the key 'sex' to 
the dictionary as a side-effect, with value 'unknown'.

Cheers,
-M

-- 
Michael J. Fromberger             | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/  | Dartmouth College, Hanover, NH, USA


From stef.mientki at gmail.com  Tue Aug 14 17:24:00 2007
From: stef.mientki at gmail.com (stef mientki)
Date: Tue, 14 Aug 2007 23:24:00 +0200
Subject: buggie in else syntax ?
Message-ID: <46C21D70.8000409@gmail.com>

hello,

I've the idea that the "else" syntax is not always handled correctly,
or I'm overlooking something.

This pieces of code are automatic translation from another language,
sometimes it works, sometimes it doesn't ???

This piece of code works nice:

    a = 2

    def JSM (line_nr):
          print line_nr

    if a>3:
        print 'asddas'
    else: JSM(230) ; \        <== this is the problem line, that's ok here
        print 'aaps'

While this piece of code gives a syntax error:

    #Function button_antidender(bit in pin,sbyte in out
    Button_Counter_Temp,byte in demp) return bit is
    def button_antidender ( pin, button_counter_temp, demp ):
         #serial_hw_write(counter)
        Serial_HW_Write ( button_counter_temp )                 ;JSM(226)
        if JSM(227) and (   button_counter_temp >= 0 ):
            if JSM(228) and (  pin == on ):
                button_counter_temp =  button_counter_temp  +  1   
    ;JSM(229)
            else: JSM(230) ;
    \                                                <=== SYNTAX ERROR
                button_counter_temp = 1                            
    ;JSM(231)

Traceback (most recent call last):
  File "D:\data_to_test\JALsPy\JALsPy.py", line 347, in ?
    Run_JALsPy_Application ()
  File "D:\data_to_test\JALsPy\JALsPy.py", line 327, in 
Run_JALsPy_Application
    JG.app.MainLoop()
  File "D:\data_to_test\JALsPy\JALsPy.py", line 255, in MainLoop
    import JAL_simulation_file
  File "D:\data_to_test\JALsPy\JAL_simulation_file.py", line 265
    else: JSM(230) ; \

I guess it's not the preferred syntax, but the resemblance with the 
original language it optimal.
Why is it sometimes accepted an sometimes give an error message ?

thanks,
Stef Mientki




From tim.couper at scivisum.co.uk  Thu Aug 30 10:44:50 2007
From: tim.couper at scivisum.co.uk (Tim Couper)
Date: Thu, 30 Aug 2007 15:44:50 +0100
Subject: Important Research Project
In-Reply-To: <1188482087.098419.56490@k79g2000hse.googlegroups.com>
References: <13ddcvm1bsu3s94@corp.supernews.com>
	<1188482087.098419.56490@k79g2000hse.googlegroups.com>
Message-ID: <46D6D7E2.7020609@scivisum.co.uk>

Paul

Excellent post  .. brightens up the otherwise hum-drum life!

Tim

Dr Tim Couper
CTO, SciVisum Ltd

www.scivisum.com



Paul McGuire wrote:
> On Aug 30, 8:12 am, "E.D.G." <edgrs... at ix.netcom.com> wrote:
>   
>> Important Research Project  (Related to computer programming)
>>
>> Posted by E.D.G. on August 30, 2007 edgrs... at ix.netcom.com
>>
>>     This report is being posted to a number of Internet Newsgroups
>>     
>
> Always the hallmark of a considerate poster.
>
>   
>> to see if
>> there are any experienced computer programmers who would like to provide
>> some assistance with an effort to develop a Perl language computer program.
>>
>>     Interested parties can try contacting me by e-mail or by posting a
>> response note to the comp.lang.perl.misc newsgroup.  They would need to
>> download a recent (free) MSI copy of Perl from the ActiveState Web site and
>> get it running on a Windows XP or Vista system.
>>
>> http://www.activestate.com
>>
>>     
>
> This is a little backwards, one usually presents their research topic
> *first* and their contact info *last*.  The reason?  SO PEOPLE KNOW
> WHAT THE @#$(&#!@ YOU ARE WORKING ON!  Ok, I'll bite, keep reading...
>
>   
>>     I am presently using Perl 5.8.8
>>     
>
> Whoop-de-doo for you.
>
>   
>> but plan to upgrade to the latest
>> version as soon as possible.  People can use Windows 98 if that is the only
>> operating system available.  Perl also runs on other operating systems.  But
>> at this time I specifically need help with the Windows version.
>>
>>     
>
> I suspect Perl is largely the same Perl on all those platforms.  Win
> 98?  Is this a zombie spam from the turn of the century?
>
>   
>>     The goal is to have a single Perl program (or modules) perform functions
>> that have been done by a sizeable collection of other language programs in
>> the past.
>>
>>     
>
> Doing what!?  Grrr..., keep reading, there's gotta be a punch line...
>
>   
>>     Help is presently needed with learning how to get Perl to generate
>> charts and also produce standalone .exe copies of itself.  The plan is to
>> then make those .exe copies available to other scientific researchers around
>> the world for free use along with free use updates when they become
>> available.  If other researchers wish to get Perl running on their own
>> computers then they will probably also be given the source code for the
>> original program for free use so that they can do their own development
>> work.
>>
>>     
>
> Ohmigod, is Google broken?  Or has Perl gone this long and this far
> without support for creating charts and graphs?  Sounds like about 10
> minutes of research.
>
>   
>>     Perl was originally chosen because it is quite versatile, is a free
>> download, and is supported both by ActiveState and quite a few independent
>> programmers.  So other researchers could get their own versions running
>> without having to worry about viruses or cost.
>>
>>     
>
> (Why is this posted on all these non-Perl newsgroups, then?  I've
> *seen* Perl already, and never want to again!)
>
>   
>>     So far the work is fairly advanced.  The effort has been underway for at
>> least a decade.  
>>     
>
> ... and we are just getting around to plotting some data.
>
>   
>> The core data generation program was formally copyrighted
>> several years ago.  
>>     
>
> Red flag #37 - "formally copyrighted", wooo-ooooh
>
>   
>> My present version of Perl will send data to Windows as
>> if it were being manually typed into the keyboard (important for controlling
>> other programs).  And it can directed to respond to most keystrokes even
>> when another program is the active one.  Unfortunately, Windows also
>> presently responds to those keystrokes.  And that complicates things a bit.
>>
>>     
>
> ... and has for the past decade, and I still haven't figured it out.
>
>   
>>     Not being a professional computer programmer I have been finding it
>> difficult to get new features such as a chart generating ability merged with
>> and running with Perl.  And the entire research project is now being slowed
>> as a result.  One of my colleagues has done an extensive amount of work with
>> Basic.  And I even offered to pay him to help with the Perl development
>> effort.  But after he downloaded a copy of Perl and examined it he decided
>> that this would involve too much effort.  I have to agree with him.
>>
>>     
>
> Maybe that up-front language choice could stand a review...
>
>   
>>     Once it is possible to create charts and .exe versions the plan is for
>> researchers around the world to develop Perl modules for generating a
>> variety of data related to sun, moon, planet, ocean tide crest and trough,
>> and Solid Earth Tide locations.  Most of those data can already be generated
>> with other programs.  Some of the data are not yet available anywhere as far
>> as I am aware.  If the effort is unusually successful the Perl program (or
>> modules) might eventually be converted to CGI programs that will run at one
>> or more Internet Web sites.
>>     
>
> AHHH!  The "research", I almost forgot!  Why is it left to the end of
> the message?  And do we still know what the @#(*&$ this "variety of
> data" is for?  I'm going to take a wild guess here - earthquake
> prediction?  perpetual motion?  picking guaranteed-to-win lottery
> numbers?
>
> After a pitch like that, who could not be tempted at the prospect of
> "generating a variety of data related to sun, moon, etc. etc."?  Sign
> me up - NOT!
>
> GTFA,
> -- Paul
>
>   


From daniels at dsl-only.net  Sun Aug 26 22:45:45 2007
From: daniels at dsl-only.net (Scott David Daniels)
Date: Sun, 26 Aug 2007 19:45:45 -0700
Subject: beginner, idiomatic python
In-Reply-To: <13d4bucfm4m1lc4@corp.supernews.com>
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csoronscqp7d2@corp.supernews.com>
	<1188090322.663217.102750@22g2000hsm.googlegroups.com>
	<13d4bucfm4m1lc4@corp.supernews.com>
Message-ID: <13d4elsj1so0ed3@corp.supernews.com>

bambam wrote:
> That is, is it defined what Python does for
>     for i in f()
> I'm sure it must be, but I haven't seen it yet. If I have
> a user defined function returning a range, is it defined
> that the range function is called on every loop? If I
> have a function returning a range taking a parameter,
>     for i in f(v)
> is it defined that the variable is evaluated for every loop?

Nope.  Take the tutorial.

     for i in f(v):
         <suite>
is the same as:
     iterator = iter(f(v))
     for i in iterator:
         <suite>

-Scott David Daniels
Scott.Daniels at Acm.Org


From sdeibel at wingware.com  Fri Aug 31 13:39:10 2007
From: sdeibel at wingware.com (Stephan Deibel)
Date: Fri, 31 Aug 2007 13:39:10 -0400
Subject: Wing IDE 3.0 beta2 released
Message-ID: <46D8523E.8030301@wingware.com>

Hi,

I'm happy to announce the release of Wing IDE 3.0 beta 2.  It is available from
http://wingware.com/wingide/beta

Changes since the previous beta release include:

* Stackless Python 2.4 and 2.5 are now supported
* Python 2.5 for 64-bit Windows is now supported
* Fixed Zope WingDBG so it will connect back to IDE
* Improved auto-completion coverage for imports and end cases
* Up to 10% speed-up when running in debugger
* Fixed many other bugs, particularly source browser, OS commands,
   testing tool, and source assistant (*)

In addition, we have introduced Wing IDE 101, a free scaled back version
of Wing IDE designed for teaching introductory programming courses.

The CHANGELOG.txt file in the installation provides additional details.

The major new features introduced in Wing 3.0 are:

* Multi-threaded debugger
* Debug value tooltips in editor, debug probe, and interactive shell
* Autocompletion in debug probe and interactive shell
* Automatically updating project directories
* Testing tool, currently supporting unittest derived tests (*)
* OS Commands tool for executing and interacting with external commands (*)
* Rewritten indentation analysis and conversion (*)
* Introduction of Wing IDE 101, a free edition for beginning programmers
* Available as a .deb package for Debian and Ubuntu
* Support for Stackless Python
* Support for 64 bit Python on Windows and Linux

(*)'d items are available in Wing IDE Professional only.

System requirements are Windows 2000 or later, OS X 10.3.9 or later for PPC or
Intel (requires X11 Server), or a recent Linux system (either 32 or 64 bit).

Compatibility Notes
-------------------

The file pattern in the Testing tab of Project Properties will need
to be re-entered if the project was saved with one of the 3.0 alpha
releases.

Reporting Bugs
--------------

Please report bugs using the Submit Bug Report item in the Help menu or by
emailing support at wingware dot com.  This is beta quality software that
installs side-by-side with Wing 2.x or 1.x. We advise you to make frequent
backups of your work when using any pre-release version of Wing IDE.

Upgrading
---------

To upgrade a 2.x license or purchase a new 3.x license:

Upgrade        https://wingware.com/store/upgrade
Purchase       https://wingware.com/store/purchase

Any 2.x license sold after May 2nd 2006 is free to upgrade; others cost
1/2 the normal price to upgrade.

If you are not ready to upgrade, feel free to keep using a series of trial
licenses. There will be no limit on the number of trials until 3.0 final is out.

Thanks!

The Wingware Team
Wingware | Python IDE
Advancing Software Development

www.wingware.com




From bignose+hates-spam at benfinney.id.au  Thu Aug 30 04:00:37 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 30 Aug 2007 18:00:37 +1000
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au> <5jn9qgFdmbcU3@mid.uni-berlin.de>
Message-ID: <87d4x5e9ju.fsf@benfinney.id.au>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:

> On Thu, 30 Aug 2007 17:09:36 +1000, Ben Finney wrote:
> > It's letting you know that the item isn't in the list. There's no
> > sensible return value from an "index" function in that condition.
> 
> What about -1?  C programmers do this all the time.  :-)

I don't believe you've contradicted me :-)

-- 
 \        "If you ever drop your keys into a river of molten lava, let |
  `\              'em go, because, man, they're gone."  -- Jack Handey |
_o__)                                                                  |
Ben Finney


From thorsten at thorstenkampe.de  Sat Aug 11 17:51:31 2007
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Sat, 11 Aug 2007 22:51:31 +0100
Subject: python 2.5 bug
References: <1186825286.493878.80380@l70g2000hse.googlegroups.com>
	<5i5fktF3ml00gU1@mid.uni-berlin.de>
	<1186826980.346619.287670@r34g2000hsd.googlegroups.com>
	<46bdfb3f$0$5102$ba4acef3@news.orange.fr>
	<MPG.2128171394cc51d9989700@news.individual.de>
	<1186861838.057027.179250@l70g2000hse.googlegroups.com>
Message-ID: <MPG.21283fc045aba712989701@news.individual.de>

*  (Sat, 11 Aug 2007 12:50:38 -0700)
> On 11 kol, 20:58, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> > * Laurent Pointal (Sat, 11 Aug 2007 20:09:03 +0200)
> > >  vedrandeko... at v-programs.com wrote:
> > > > On 11 kol, 11:59, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> > > >> On Sat, 11 Aug 2007 02:41:26 -0700, vedrandekovic wrote:
> > > >> > I was install Python 2.5 and uninstall Python 2.4 now I cannot run my
> > > >> > scripts, only from idle
> >
> > > IMHO Python 2.4 was registered for .py files, Python 2.5 take precedence
> > > when installed, but when Python 2.4 has been removed, it remove .py files
> > > association too (so break Python 2.5 association).
> >
> > > * manually associate .py/.pyc/.pyo files to python.exe, .pyw files to
> > > pythonw.exe.
> >
> > > * or reinstall Python 2.5 so that it re-setup ad-hoc associations.
> >
> > Yeah. Did the Original Poster mention any details about his problem.
> > Like - for instance - that he's using Windows?
> >
> Now I was restart my windows and python 2.5 also.Now everything works
> fine except python and py2exe script install ( of course something
> must destroy my day ) now when I run:
> 
> $ cd c:\Python25\Lib\site-packages\
> $ python mysetup.py py2exe
> 'python' is not recognized as an internal or external command,
> operable program or batch file.
> 
> why?

Because the directory containing python.exe is not in your path. By 
the way: the Python installation routine doesn't modify your path so 
it is likely unrelated to that.

T.


From bbxx789_05ss at yahoo.com  Thu Aug 30 16:30:27 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Thu, 30 Aug 2007 13:30:27 -0700
Subject: gc.garbage
In-Reply-To: <mailman.157.1188499024.28954.python-list@python.org>
References: <1188467173.708043.44800@w3g2000hsg.googlegroups.com>
	<46D692FC.4030805@v.loewis.de>
	<1188498335.633506.90050@q4g2000prc.googlegroups.com>
	<mailman.157.1188499024.28954.python-list@python.org>
Message-ID: <1188505827.505656.243400@z24g2000prh.googlegroups.com>

On Aug 30, 12:36 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/30/07, 7stud <bbxx789_0... at yahoo.com> wrote:
>
> > On Aug 30, 3:50 am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > > > gc.set_debug(gc.DEBUG_LEAK)
> > > > print gc.garbage
>
> > > > --output:--
> > > > []
> > > > gc: uncollectable <Dog 0x56e10>
> > > > gc: uncollectable <Cat 0x56e30>
> > > > gc: uncollectable <dict 0x58270>
> > > > gc: uncollectable <dict 0x43e40>
>
> > > gc.garbage is filled only after these messages
> > > are printed, not before. You need to add an explicit
> > > call to gc.collect() if you want to see what
> > > uncollectable garbage you have.
>
> > > Regards,
> > > Martin
>
> > Hi,
>
> > Thanks for the response.  I had a cut and paste error in my reply, so
> > here it is again with the corrections...
>
> > Now, if I run the code:
>
> > ------------
> > import gc
>
> > class Cat(object):
> >     def __del__():
> >         pass
>
> > class Dog(object):
> >     def __del__():
> >         pass
>
> > def some_func():
> >     the_dog = Dog()
> >     the_cat = Cat()
> >     the_dog.cat = the_cat
> >     the_cat.dog = the_dog
>
> > some_func()
>
> > gc.set_debug(gc.DEBUG_LEAK)
> > gc.collect()
> > print gc.garbage
> > -----------
>
> > I get this output:
>
> > ----------
> > gc: uncollectable <Dog 0x56e10>
> > gc: uncollectable <Cat 0x56e30>
> > gc: uncollectable <dict 0x58300>
> > gc: uncollectable <dict 0x43e40>
> > [<__main__.Dog object at 0x56e10>, <__main__.Cat object at 0x56e30>,
> > {'cat': <__main__.Cat object at 0x56e30>}, {'dog': <__main__.Dog
> > object at 0x56e10>}]
> > -----------
>
> > Why are there two entries in the list for each uncollectable
> > object(same addresses)?  Also, I haven't bound the names "cat" or
> > "dog" anywhere in my program.  What do those names mean in the list?
>
> Read your output carefully!
>
> gc.garbage is a list of objects. The objects are printed just as they
> would be anywhere else in Python. You've got the dog object, the cat
> object, and the __dict__ of each instance.
>
>

Ah.  I missed the braces inside the list, but I still don't understand
where the names "cat" and "dog" come from.


> DEBUG_SAVEALL is set, then all unreachable objects will be added to
> this list rather than freed."

What is the definition of an "unreachable object"?  If I add the
following:

-----
y = Cat()
del y
-----

That object doesn't make it into gc.garbage.



From steve at holdenweb.com  Sat Aug  4 09:12:23 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 04 Aug 2007 09:12:23 -0400
Subject: bias in random.normalvariate??
In-Reply-To: <f912rl$50u$1@sea.gmane.org>
References: <1186198720.800007.38800@k79g2000hse.googlegroups.com>
	<f912rl$50u$1@sea.gmane.org>
Message-ID: <f91tvn$uj9$1@sea.gmane.org>

Robert Kern wrote:
> drewlist at gmail.com wrote:
>> I'm a Python newbie and certainly no expert on statistics, but my wife
>> was taking a statistics course this summer and to illustrate that
>> sampling random numbers from a distribution and taking an average of
>> the samples gives you a random number as the result (bigger sample ->
>> smaller variance in the calculated random number, converging in on the
>> mean of the original distribution), I threw together this program:
>>
>> #! /usr/bin/python
>>
>> import random;
>>
>> i=1
>> samplen=100
>> mean=130
>> lo=mean
>> hi=mean
>> sd=10
>> sum=0
>> while(i<=samplen):
>> 	x=random.normalvariate(mean,sd)
>> 	#print x
>> 	if x<lo: lo=x
>> 	if x>hi: high=x
>> 	sum+=x
>> 	i+=1
>> print 'sample mean=', sum/samplen, '\n'
>> print 'low value =', lo
>> print 'high value=', high
> 
> Your code has an error. In the middle of your code, you changed "hi" to "high".
> 
Which very nicely makes the point that you can test algorithms driven by 
random data using statistical functions on the output!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From iddw at hotmail.com  Tue Aug 21 14:25:29 2007
From: iddw at hotmail.com (Dave Hansen)
Date: Tue, 21 Aug 2007 11:25:29 -0700
Subject: Newbee Question
In-Reply-To: <13cl6nes7skrh75@corp.supernews.com>
References: <mailman.15.1187620149.26576.python-list@python.org>
	<1187621470.484615.7010@i13g2000prf.googlegroups.com>
	<13cl6nes7skrh75@corp.supernews.com>
Message-ID: <1187720729.970795.112680@i38g2000prf.googlegroups.com>

On Aug 21, 2:57 am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
[...]
>
>         pay = min(num, 22) * 0.4 + max(num-22, 0) * 1.4

   pay = num*0.4 + (num>22)*(num-22)

;-)

   -=Dave



From jstroud at mbi.ucla.edu  Thu Aug  9 21:28:35 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 09 Aug 2007 18:28:35 -0700
Subject: beginner whitespace question
In-Reply-To: <1186708404.901323.204730@g12g2000prg.googlegroups.com>
References: <1186703261.136506.208660@x35g2000prf.googlegroups.com>
	<1186703525.591462.122140@m37g2000prh.googlegroups.com>
	<1186704161.334597.218750@z24g2000prh.googlegroups.com>
	<1186707164.095766.243480@q3g2000prf.googlegroups.com>
	<1186708404.901323.204730@g12g2000prg.googlegroups.com>
Message-ID: <f9gf03$3al$1@daisy.noc.ucla.edu>

eggie5 wrote:
> But this still isn't valid:
> 
> from django.db import models
> 
> class Poll(models.Model):
> 	question = models.CharField(max_length=200)
> 	pub_date = models.DateTimeField('date published')
> 
>     def __unicode__(self):
> 		return self.question
> 
> 
> 
> class Choice(models.Model):
>     poll = models.ForeignKey(Poll)
>     choice = models.CharField(max_length=200)
>     votes = models.IntegerField()
> 
>     def __unicode__(self):
> 		return self.choice


You want this:


from django.db import models

class Poll(models.Model):
	question = models.CharField(max_length=200)
	pub_date = models.DateTimeField('date published')

	def __unicode__(self):
		return self.question



class Choice(models.Model):
     poll = models.ForeignKey(Poll)
     choice = models.CharField(max_length=200)
     votes = models.IntegerField()

     def __unicode__(self):
	return self.choice


But this mixes tabs and spaces.

Rules:

1. Don't use tabs!
2. If you are clueless enough to violate (1), then don't mix tabs and 
spaces.
3. Don't use tabs!

Tabs are for tables, hence the name. "Use spaces for space and use tabs 
for tables" can be a little mnemonic to help you remember the rules. We 
can make a little song together if you can think of some things that 
rhyme with "don't" and "use" and "tabs".

You have been warned. Next time I'll piont and laugh as I answer.

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From dieter_vanderelst at emailengine.org  Tue Aug 14 13:26:05 2007
From: dieter_vanderelst at emailengine.org (Dieter Vanderelst)
Date: Tue, 14 Aug 2007 19:26:05 +0200
Subject: pil_usm for python 2.5?
Message-ID: <1187112365.2431.1205363633@webmail.messagingengine.com>

Hi list, 
Does anybody have a version of pil_usm (module for gaussian blurring) 
that is compiled for Python 2.5?
 
Regards,
Dieter
 
-- 
Dieter Vanderelst
d.vanderelst at tue.nl
Department of Industrial Design
Designed Intelligence
-- 
  Dieter Vanderelst
  dieter_vanderelst at emailengine.org



From cai.haibin at gmail.com  Wed Aug  1 22:16:59 2007
From: cai.haibin at gmail.com (james_027)
Date: Thu, 02 Aug 2007 02:16:59 -0000
Subject: access the name of my method inside it
In-Reply-To: <1185959202.302467.276080@x35g2000prf.googlegroups.com>
References: <1185959202.302467.276080@x35g2000prf.googlegroups.com>
Message-ID: <1186021019.073479.287410@i13g2000prf.googlegroups.com>

Hi all!

Thanks for all your idea, this community is truly a great one!

james



From Lost at inhere.com  Mon Aug 27 09:18:06 2007
From: Lost at inhere.com (Lost in the Wasteland)
Date: Mon, 27 Aug 2007 08:18:06 -0500
Subject: Let's Unite Against Jews and Mongrels!
In-Reply-To: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
References: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
Message-ID: <1188220560_8937@sp12lax.superfeed.net>

Nenad Milicevic - The Aryan Serb wrote:

> Belgrade, Serbia
> 

  Looks like a nice place to vacation.

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


From tjreedy at udel.edu  Mon Aug 20 17:30:48 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 20 Aug 2007 17:30:48 -0400
Subject: str().join() isn't working
References: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com><mailman.4.1187633821.32294.python-list@python.org><1187634895.387910.179500@m37g2000prh.googlegroups.com>
	<496954360708201249y1db0aa14qf0de14538fb51b9d@mail.gmail.com>
Message-ID: <fad17f$252$1@sea.gmane.org>


"Robert Dailey" <rcdailey at gmail.com> wrote in message 
news:496954360708201249y1db0aa14qf0de14538fb51b9d at mail.gmail.com...
| Hi all,
|
| Thanks for your response. I figured out the issue. I was using
| list.append() to append another list, when I should have been using
| expand(). Sorry for the confusion.

The method is .extend, not .expand ;=)





From carsten at uniqsys.com  Fri Aug 31 22:13:16 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 31 Aug 2007 22:13:16 -0400
Subject: list index()
In-Reply-To: <fbagd1$gnm$4@lust.ihug.co.nz>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<1188496588.750629.208100@g4g2000hsf.googlegroups.com>
	<mailman.154.1188497511.28954.python-list@python.org>
	<1188498073.997168.282420@q5g2000prf.googlegroups.com>
	<mailman.156.1188498891.28954.python-list@python.org>
	<fbagd1$gnm$4@lust.ihug.co.nz>
Message-ID: <1188612796.3259.3.camel@localhost.localdomain>

On Sat, 2007-09-01 at 13:50 +1200, Lawrence D'Oliveiro wrote:
> In message <mailman.156.1188498891.28954.python-list at python.org>, Carsten
> Haese wrote:
> > has_key() will go away, period. It has been made obsolete by "in", which
> > is faster and more concise.
> 
> And is also a backdoor way of introducing non-virtual methods into Python,
> is it not.

If by that you mean that "in" tests can't be overridden, that's not
true:

>>> class LyingDict(dict):
...   def __contains__(self, key): return False
... 
>>> d = LyingDict()
>>> d[1] = 42
>>> 1 in d
False

If you mean something else, please clarify.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From lasses_weil at klapptsowieso.net  Thu Aug 30 18:03:38 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Fri, 31 Aug 2007 00:03:38 +0200
Subject: Setting a read-only attribute
In-Reply-To: <1188510690.622808.247220@z24g2000prh.googlegroups.com>
References: <1188509700.915517.178440@z24g2000prh.googlegroups.com>
	<1188510690.622808.247220@z24g2000prh.googlegroups.com>
Message-ID: <46d73eba$0$4516$9b4e6d93@newsspool3.arcor-online.net>

Arnaud Delobelle wrote:
> On Aug 30, 10:35 pm, "tleeuwenb... at gmail.com" <tleeuwenb... at gmail.com>
> wrote:
>> I have an object and wish to set an attribute on it which,
>> unfortunately for me, is read-only.
> 
> If it's read-only then you can't set it!
> 
>> How can I go about this?
> 
> Joke aside, I think you need to be more specific.
> 
To be more specific about much more specific you should be:
If you know the exact problem/hurdle you have to overcome, explain it. 
Otherwise kindly provide the traceback (error message) you get when 
attempting to set the attribute.

/W


From http  Sat Aug 11 08:05:40 2007
From: http (Paul Rubin)
Date: 11 Aug 2007 05:05:40 -0700
Subject: LRU cache?
Message-ID: <7x8x8ixomj.fsf_-_@ruckus.brouhaha.com>

Anyone got a favorite LRU cache implementation?  I see a few in google
but none look all that good.  I just want a dictionary indexed by
strings, that remembers the last few thousand entries I put in it.

It actually looks like this is almost a FAQ.  A well-written
implementation would probably make a good standard library module.


From hancock.robert at gmail.com  Mon Aug 13 17:58:10 2007
From: hancock.robert at gmail.com (milan_sanremo)
Date: Mon, 13 Aug 2007 21:58:10 -0000
Subject: chmod g+ Equivalent
Message-ID: <1187042290.821786.178420@19g2000hsx.googlegroups.com>

I've read the documentation on os.chmod() and can implement all the
standard commands, but what is the syntax for the equivalent of chmod g
+ to set the group id?



From jstroud at mbi.ucla.edu  Thu Aug 16 19:21:00 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 16 Aug 2007 16:21:00 -0700
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
Message-ID: <fa2m4s$k1g$1@daisy.noc.ucla.edu>

beginner wrote:
> Hi All.
> 
> I'd like to do the following in more succint code:
> 
> if k in b:
>     a=b[k]
> else:
>     a={}
>     b[k]=a
> 
> a['A']=1
> 
> 
> In perl it is just one line: $a=$b->{"A"} ||={}.


I'm afraid you've asked a non sequiter:

euler 40% cat test.pl

$a=$b->{"A"} ||={} ;
print "$a\n" ;

$b->{"B"} = 0 ;
$a=$b->{"B"} ||={} ;
print "$a\n" ;

$b->{"X"} = 15 ;
$a=$b->{"X"} ||={} ;
print "$a\n" ;

euler 41% perl test.pl
HASH(0x92662a0)
HASH(0x926609c)
15


James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From naga86 at gmail.com  Thu Aug 23 06:20:21 2007
From: naga86 at gmail.com (Nagarajan)
Date: Thu, 23 Aug 2007 10:20:21 -0000
Subject: Raw strings to normal strings conversion?
In-Reply-To: <5j534qF3qf8ssU2@mid.uni-berlin.de>
References: <1187851660.209024.59860@l22g2000prc.googlegroups.com>
	<Xrbzi.21051$eY.3412@newssvr13.news.prodigy.net>
	<1187860900.740674.87180@e9g2000prf.googlegroups.com>
	<5j534qF3qf8ssU2@mid.uni-berlin.de>
Message-ID: <1187864421.890009.326890@e9g2000prf.googlegroups.com>

On Aug 23, 2:42 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Thu, 23 Aug 2007 09:21:40 +0000, Nagarajan wrote:
> > On Aug 23, 1:21 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> >> Nagarajan wrote:
> >> > Is there a way by which I could obtain normal string form of a raw
> >> > string.
> >> > XML CDATA is returned as raw string. But I need the string to actually
> >> > escape special chars.
>
> >> > Any idea?
>
> >> This doesn't seem clear. Perhaps an example of what you get and what you
> >> want it converted to.
>
> > Here is an example:
> >>> rawstr = r'a\nb'
> >>> print rawstr
> > a\nb
>
> > Now I need this newstr to actually interpret '\n', in other words, to
> > behave like a normal string.
>
> So you get a string with Newlines as two character sequence \n.  You don't
> get "raw" strings.  That is a concept in Python source code.  When the
> program is running there is no such distinction between "raw" and "normal"
> strings.  Here's a solution:
>
> In [87]: print r'a\nb'
> a\nb
>
> In [88]: print r'a\nb'.decode('string-escape')
> a
> b
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Thanks a lot.



From wildemar at freakmail.de  Mon Aug 13 05:33:14 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Mon, 13 Aug 2007 11:33:14 +0200
Subject: Adventure-Engines in Python
Message-ID: <46C0255A.4080707@freakmail.de>

Are there any?

I've set out to make an adventure game and now I'm trying to find a set 
of python-modules to help me do that. I know of the usual non-python 
suspects (AGAST, AGS, Wintermute, ...) and while I they are really good, 
I'd like one that is cross platform.

I've found pyScumm and pyAdv but both don't seem to be ready for use 
yet. So are there any "usable" engines written in python?

/W


From fperez.net at gmail.com  Thu Aug  2 14:32:43 2007
From: fperez.net at gmail.com (Fernando Perez)
Date: Thu, 02 Aug 2007 12:32:43 -0600
Subject: Bug in execfile?
Message-ID: <f8t80e$gvh$1@sea.gmane.org>

Hi all,

I'm finding the following behavior truly puzzling, but before I post a bug
report on the site, I'd rather be corrected if I'm just missing somethin
obvious.

Consider the following trivial script:

# Simple script that imports something from the stdlib
from math import sin, pi

wav = lambda k,x: sin(2*pi*k*x)

print wav(1,0.25)

# EOF


The above runs just fine from a prompt, or even interactively via execfile(). 
Now, consider calling it by using this instead:

#!/usr/bin/env python
"""Test for a bug (?) in scope handling by the execfile() builtin."""


def runscript(fname):
    """Run a file by calling execfile()."""
    execfile(fname)


# Note: if you activate this section so that execfile() is directly called
# first, then the bug below disappears!!!
if 0:
    print '='*80
    print '# Trying execfile:'
    execfile('execfilebugscript.py')

# The bug: we get an exception from running the little script, where the 'sin'
# name imported from math is not visible to the lambda.
print '-'*80
print '# Trying the runscript wrapper:'
runscript('execfilebugscript.py')

##### EOF


If I run the above, calling the first script 'execfilebugscript.py' and the
second 'execfilebug.py', I get this:

planck[test]> ./execfilebug.py
--------------------------------------------------------------------------------
# Trying the runscript wrapper:
Traceback (most recent call last):
  File "./execfilebug.py", line 21, in <module>
    runscript('execfilebugscript.py')
  File "./execfilebug.py", line 7, in runscript
    execfile(fname)
  File "execfilebugscript.py", line 6, in <module>
    print wav(1,0.25)
  File "execfilebugscript.py", line 4, in <lambda>
    wav = lambda k,x: sin(2*pi*k*x)
NameError: global name 'sin' is not defined


WTF???  Now even weirder, if the 'if 0' is turned into 'if 1' so that *first*
execfile is called at the top-level (not inside a function), then *both* calls
work:

planck[test]> ./execfilebug.py
================================================================================
# Trying execfile:
1.0
--------------------------------------------------------------------------------
# Trying the runscript wrapper:
1.0


I'm really, really puzzled by this.  From reading the execfile() docs, I had
the hunch to change the call to:

    execfile(fname,{})

and now the problem disappears, so I can keep on working.

But I'm still very bothered by the fact that changing that first call 'if 0'
to 'if 1' has any effect on the later call to runscript().  That really
doesn't feel right to me...

Any wisdom will be much appreciated.

Cheers,

f



From conspiracy.black3 at gmail.com  Wed Aug  8 15:08:45 2007
From: conspiracy.black3 at gmail.com (conspiracy.black3 at gmail.com)
Date: Wed, 08 Aug 2007 12:08:45 -0700
Subject: Google Conspiracy Revealed!
Message-ID: <1186600125.435154.68910@m37g2000prh.googlegroups.com>

http://www.nasaconspiracy.net/2007/06/content-generator-recognizing-generated.html
- Amazing Google Conspiracies Revealed from CIA, NSA and Government
conspiracies and Dr.Kevorkians magic pills.



From kar1107 at gmail.com  Tue Aug 21 23:58:13 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Tue, 21 Aug 2007 20:58:13 -0700
Subject: Chaining programs with pipe
In-Reply-To: <13cnbl0p9qf26e0@corp.supernews.com>
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
	<1187743235.124030.321200@l22g2000prc.googlegroups.com>
	<13cnbl0p9qf26e0@corp.supernews.com>
Message-ID: <1187755093.138467.71270@x35g2000prf.googlegroups.com>

On Aug 21, 8:33 pm, Grant Edwards <gra... at visi.com> wrote:
> On 2007-08-22, Karthik Gurusamy <kar1... at gmail.com> wrote:
>
> > Not sure on non-unix platforms, but in unix like platforms it's best
> > to reuse shell's power.
>
> >>>> import commands
> >>>> commands.getoutput('ls | wc')
> > '      4       4      24'
>
> Executing a shell just because you want a pipe seems like a bit
> of overkill.  Doing it the "right" way with subprocess is
> pretty trivial.

Probably I should've put extra stress on the word "reuse".
The example quoted was trivial; if you replace the pipeline to have
say 5 processes, the advantage of not-reinventing the wheel becomes
more obvious.

I would call hand-crafting the pipe-setup an "overkill" when a very
good solution already exists to solve the problem. Yes, it may be
trivial to do; but not simpler than delegating to a shell.

Karthik


>
> --
> Grant Edwards                   grante             Yow!  I was born in a
>                                   at               Hostess Cupcake factory
>                                visi.com            before the sexual
>                                                    revolution!




From pavlovevidence at gmail.com  Mon Aug 27 19:21:43 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Mon, 27 Aug 2007 16:21:43 -0700
Subject: "Try:" which only encompasses head of compound statement
In-Reply-To: <1188250535.607963.42540@22g2000hsm.googlegroups.com>
References: <1188250535.607963.42540@22g2000hsm.googlegroups.com>
Message-ID: <1188256903.075011.173820@k79g2000hse.googlegroups.com>

On Aug 27, 5:35 pm, Jameson.Qu... at gmail.com wrote:
> I have:
>
> try:
>     for line in open(myFileName):
>         count += 1
> except IOError:
>     print "Can't open myfile"
>
> (I know, this is bad, I never close the file, but its just for
> illustration). But then I change it to:
>
> try:
>     for line in open(myFileName):
>         count += openAndProcessSubfile(line)
> except IOError:
>     print "Can't open myfile"
>
> ... now the 'except' incorrectly catches errors from
> openAndProcessSubfile.
> Of course, I can always do:
>
> try:
>     myFile = open(myFileName)
> except IOError:
>     print "Can't open myfile"
> for line in myFile:
>     count += openAndProcessSubfile(line)
>
> ...But if my compound statement is "with" instead of "for" that seems
> to defeat the purpose:
>
> try:
>     myFile = open(myFileName)
> except IOError:
>     print "Can't open myfile"
> with myFile as anotherNameForMyFile:
>     ....


I suspect this isn't often complained about because this usage of
try...except kind of misses the boat.  The above treats the exception
as nothing more than an error return code, but it's often not optimal
to handle error so close to the call.

The best reason to catch and handle an exception very close to the
call is if you intend to recover from it right away.  For example:

try:
    f = open("fileA")
except IOError:
    f = open("fileB")

If you don't intend to recover right away, it's usually better to let
the exception propogate until up the call chain until the point where
you do want to recover.

Consider this: is there any other code in your program that has to do
something different based on whether you successfully opened this file
or not?  If so, how will you notify it whether the call has succeeded
or not?  Very often, the caller itself needs to know.  You could, say,
set a flag to indicate it's failed, but why do that when you could
simply let the caller detect and handle the error itself?

If you don't intend to recover at all, you should let it propogate up
to the point where you will resume normal processing (for example:
before the next input prompt), and handle it there.  Especially if
you're going to print an error message: printing an error message at
the point the error occurs can severely limit code reusability.


Enough rambling.  Here's what I'd do in your situation: nothing.
Don't handle the exception here at all.  Let it raise IOError.  My
code would look like this:

with open('myFile') as myFile:
    ....

However, I would handle the exeption wherever I intended to take
action based on success or failure.  It looks like you are treating
"file-not-found" as non-fatal, and other IOErrors as fatal?  In that
case, we would have to check the error code to distinguish, and
reraise if not file not found.

# this is the point where success or failure
# determines what I do next, that's why I handle
# the exception here.
try:
    load_myFile()
except IOError, e:
    if e.errno == 2:  # file not found is usually errno 2
        print "file not found"
    else:
        raise
else:
    # load succeeded, do whatever.


One other useful technique is recasting: catching an error close to
the call, and raising a different error.


Carl Banks



From carsten at uniqsys.com  Wed Aug  8 09:52:04 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 08 Aug 2007 09:52:04 -0400
Subject: Something in the function tutorial confused me.
In-Reply-To: <f9ceb9$jsm$1@sea.gmane.org>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
	<46B8626A.2070303@bigfoot.com>
	<mailman.1726.1186537161.22759.python-list@python.org>
	<5hsoi3F3mlni2U1@mid.individual.net>  <f9ceb9$jsm$1@sea.gmane.org>
Message-ID: <1186581124.3383.55.camel@dot.uniqsys.com>

On Wed, 2007-08-08 at 08:52 -0400, Steve Holden wrote:
> While it's correct that rebinding y will usually cause it to reference a 
> different object, this need not be true of assignment. The augmented 
> assignment operations do no necessarily rebind their left-hand operand - 
> that depends on the implementation of the relevant method in whatever 
> type is the subject of the augmented assignment.
> 
> An *assignment* to y therefore *usually* rebinds the name y to point to 
> a different value.

You are certainly correct within the bounds of the terminology you're
using, but I think some clarifications are necessary.

The language reference draws a clear distinction between assignments and
augmented assignments. In an augmented assignment, the difference
between a mutable target and a non-mutable target is indeed of utmost
relevance. However, drawing this distinction into a discussion about
what *assignments* will and won't do is confusing matters.

In a "plain" assignment of the form "name = expression", the mutability
of the object that the name is pointing to, if any, does not matter. I
believe that that was the point greg was trying to make when he objected
to this statement of yours:

"""
When the function starts out with None as y's value any assignment to y 
causes it to reference a different value (since None is immutable). So 
the next time the function is called y is pointing at the None that it 
was pointing at the last time the function was called (since None cannot
be mutated).
"""

The problem is your ambiguous use of the word "assignment." In the sense
of the Language Reference, "any assignment to y" is a simple assignment
that always modifies a namespace and never modifies an object. In that
sense, the mutability of None really isn't the issue.

If you use the broader sense in which "assignment" includes augmented
assignments, the mutability of None does become relevant.

I agree that greg's delivery was unduly disrespectful, but I think he
was making a valid point.

Hope this helps clear up the confusion.

Best regards,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From BerndWill at googlemail.com  Sat Aug 11 06:00:10 2007
From: BerndWill at googlemail.com (OpenPavilion)
Date: Sat, 11 Aug 2007 10:00:10 -0000
Subject: question: howto transfer objects between server and client?
In-Reply-To: <46bd7faa$0$239$e4fe514c@news.xs4all.nl>
References: <1186823076.923464.294120@57g2000hsv.googlegroups.com>
	<46bd7faa$0$239$e4fe514c@news.xs4all.nl>
Message-ID: <1186826410.019139.121680@l70g2000hse.googlegroups.com>

On 11 Aug., 11:21, Irmen de Jong <irmen.NOS... at xs4all.nl> wrote:
> OpenPavilion wrote:
> > Since XMLRPC has limited features:  Is there any other server/client
> > technique to transfer objects (not strings, or dictionaries, but self
> > defined object types) ?
>
> Take a look at Pyro;  http://pyro.sourceforge.net
>
> --Irmen

Thanks Irmen,

just found out, that if I use "pickle.dumps(object)" (on client side)
and "pickle.loads(object)" (on server side) before and after sending,
I have access to the object.

I love this python language !
Python is a really, really nice language and I often find that the
solution is easier as I thought in the first place ...

Thanks anyway !!
Regards
Bernd



From a.harrowell at gmail.com  Fri Aug 17 08:38:16 2007
From: a.harrowell at gmail.com (TYR)
Date: Fri, 17 Aug 2007 12:38:16 -0000
Subject: Naming dictionaries recursively
Message-ID: <1187354296.177606.273300@22g2000hsm.googlegroups.com>

I'd like to do something like this; iterate through a file which
consists of data stored in dictionary format, one dict on each line,
and read each line into a new dict using one of the values in the dict
as its name...

for example:

stuff = open('data.txt')
 for eachLine in stuff:
  name{}
   name = eachLine
....and then do something clever to extract the value of the key
(name) from the line and use it as the dictionary's name.

A line from data.txt would look like this: {'name' : Bob, 'species' :
Humboldt, 'colour' : red, 'habits' : predatory}. Aim is to call one of
them by name, and merge the values in that dictionary into a string
pulled from another source.



From aleax at mac.com  Fri Aug 17 23:00:06 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 17 Aug 2007 20:00:06 -0700
Subject: Can python threads take advantage of use dual core ?
References: <1187366443.621295.97020@e9g2000prf.googlegroups.com>
	<5ilvg4F3pqv6aU1@mid.uni-berlin.de>
	<46c5c924$0$7688$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <1i309vp.8k7vpd1g1ulkgN%aleax@mac.com>

Stefan Behnel <stefan.behnel-n05pAM at web.de> wrote:
   ...
> Which virtually all computation-intensive extensions do. Also, note the

gmpy doesn't (release the GIL), even though it IS computationally
intensive -- I tried, but it slows things down horribly even on an Intel
Core Duo.  I suspect that may partly be due to the locking strategy of
the underlying GMP 4.2 library (which I haven't analyzed in depth).  In
practice, when I want to exploit both cores to the hilt with gmpy-based
computations, I run multiple processes.


Alex


From jstroud at mbi.ucla.edu  Fri Aug 24 16:44:26 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 24 Aug 2007 13:44:26 -0700
Subject: Co-developers wanted: document markup language
In-Reply-To: <87y7g0udnp.fsf@wilson.homeunix.com>
References: <87odgyyx9u.fsf@wilson.homeunix.com>	<87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com>	<87tzqp77my.fsf@wilson.homeunix.com>
	<famljb$1d9$1@panix3.panix.com>
	<87y7g0udnp.fsf@wilson.homeunix.com>
Message-ID: <fanfva$23k$1@daisy.noc.ucla.edu>

Torsten Bronger wrote:
> Reading only forums and newsgroups, one may think that this is
> impossible but in real life, I've seen more people using LaTeX
> exactly once and never again than people who keep using it.

This is funny. I developed a pretty good competence in LaTeX to write my 
thesis (which thanks to LaTeX, looked beautiful) and never once used 
LaTeX again.

The biggest hurdle to these markup languages is collaborative documents 
and that LaTeX and the like are impossible for collaborators to learn. 
Yes, impossible, in the 0%-chance-of-ever-happening meaning. So you get 
stuck with Word. This is the reality once you are passed writing term 
papers.

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From mcl.office at googlemail.com  Sun Aug 19 16:36:32 2007
From: mcl.office at googlemail.com (mosscliffe)
Date: Sun, 19 Aug 2007 13:36:32 -0700
Subject: 1)URL QueryString Parsing 2)Search Engine Spiders
In-Reply-To: <f4Xxi.28397$RX.20357@newssvr11.news.prodigy.net>
References: <1187513415.188232.187270@50g2000hsm.googlegroups.com>
	<f4Xxi.28397$RX.20357@newssvr11.news.prodigy.net>
Message-ID: <1187555792.508140.125300@a39g2000hsc.googlegroups.com>

On 19 Aug, 13:54, samwyse <dejan... at email.com> wrote:
> mosscliffewrote:
> > I am trying to create a back link, equivalent to the browser back
> > action and I can not use java script. The target user does not allow
> > java script.
>
> > I am using HTTP_REFERER.
>
> > I need to add the original Query String values.
>
> > Is there a way to get the QueryString element other than by using
> > cgi.FieldStorage, as I just want to return with the values that were
> > current in the calling page.
>
> > gv.orgQueryString = ""
>
> > gv.BackButton = '<A href="' + os.environ.get("HTTP_REFERER") +
> > gv.orgQueryString + '">BACK</A>'
>
> I'm not sure I understand your problem.  Does the above code not work?
>
> > Am I right in thinking Search Engine Spiders will never see my script
> > pages as they exist only for the duration of the python script's
> > execution ?  And even then as they are   xxx.py, they would not be
> > seen.
>
> Anyone who accesses your web server will see the pages that you serve.
> If you serve the xxx.py files, then they can be seen and indexed,
> otherwise they are invisible.

I currently have to build the query string from each field passed.  I
was hoping I could somehow just
split the query string. something like

TheQueryStribgBit = FullURL.split("&")

but I can't find a reference to FullURL with os.environ's

I apologise for my lack of clarity - the grey matter is getting a bit
long in the tooth.

Richard



From python at jayloden.com  Mon Aug 20 16:11:13 2007
From: python at jayloden.com (Jay Loden)
Date: Mon, 20 Aug 2007 16:11:13 -0400
Subject: reading a line in file
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE2B6@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx><2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com><93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx>	<2dc0c81b0708201207p7f83f2e0l6de15fd70be252a5@mail.gmail.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2B6@efmailx>
Message-ID: <46C9F561.50405@jayloden.com>

Brian McCann wrote:
> Shawn, Tim ,Jay
>  
> many thanks,
>  
> It looks like there are many ways this problem can be approached
> 
> either by using  regex or a tokens
> 
> Tim I'm not familiar with your solution, but will learn about that
> method also
> Jay, what do you mean by regex comes with a lot of overhead?
> --Brian

Regular expression parsing can have a lot of overhead, i.e. processing power/memory usage so it's recommended that they only be used when actually needed. If you only have to search for a very specific set of text or manipulate text that is very rigidly, then there's little benefit to including regular expressions. By comparison, if you have a need to match a lot of various cases or conditions, a regular expression can be by far the more efficient or logical method to use. 

-Jay


From jstroud at mbi.ucla.edu  Sat Aug  4 04:52:28 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 04 Aug 2007 08:52:28 GMT
Subject: How to pass a reference to the current module
In-Reply-To: <pan.2007.08.04.04.56.18.773038@REMOVE.THIS.cybersource.com.au>
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<pan.2007.08.04.01.46.50.985228@REMOVE.THIS.cybersource.com.au>
	<f90lon$av5$1@daisy.noc.ucla.edu>
	<7xtzrg3vof.fsf@ruckus.brouhaha.com>
	<f90tvv$nt7$2@zinnia.noc.ucla.edu>
	<pan.2007.08.04.04.56.18.773038@REMOVE.THIS.cybersource.com.au>
Message-ID: <g7Xsi.43654$Um6.2191@newssvr12.news.prodigy.net>

Steven D'Aprano wrote:
> I suggest you're falling for the anti-pattern of "Big Design Up Front",
> and are overly complicating your system "just in case it's useful". Why
> not just _insist_ that main.py and UserDefined1.py must be different
> modules? You're the application developer, you're allowed to do that.

The idea of the module I'm writing is to allow the user to define 
functions where they want and to create single-file python scripts that 
can make use of my API. The point of the module is to be beginner 
friendly, but maybe that is asking too much as user friendliness might 
be a potentially useful but provably unnecessary attribute.

>>     2. foo is defined in `main`
> 
> Maybe you should just prohibit that? Do you really want to allow users to
> call arbitrary code in your main application at arbitrary times and places?

It would be the user's main and they would be importing my module. I 
would like my module to be aware of the contents of the user's module. I 
thought such a thing would be possible because it seems like something 
similar is happening in distutils py2app.

> But in any case, it shouldn't matter. main is the program running -- it
> has to be, because you can't import it from another program -- so
> globals()['foo'] will work.
> 
> 
>> Possibility two (even when it is a properly named module) sets the stage 
>> for a circular import, but I believe in python this is not entirely 
>> worrisome. However, the combination above makes it difficult to pass a 
>> reference to the `main` namespace without some sort of introspection. 
> 
> That's what globals() is for.

On second thought this might not be horribly bad:

    FunctionUser.do_something_with(globals(), 'doit', 7)

or

    FunctionUser.do_something_with(UserDefined1.globals(), 'foo', 7)


 From a beginner-user's perspective (i.e. potential users of my module), 
it seems a little awkward, but might be more natural on the whole than 
the alternatives. However, if I had my druthers, I would rather have 
some way to pass a reference to the current module in the former case 
and have do_something_with() call globals(). I really like the idea of 
having the module or its namespace as an optional argument and 
implicitly using the calling global namespace if its left out. But 
perhaps this is bad design from an "explicit is better than implicit" 
perspective.

>> [foo]
>> param1 = float
>> param2 = 4
>>
>> [option1]
>> __module__ = 'UserDefined1'
>> __function__ = 'doit'
> 
> 
> I'm not sure why you need the quotation marks around the module and
> function names. What else could UserDefined1 be, other than a string?

Yes, those were typos. And to be consistent, the whole listing of the 
configuration file should be (note: 'doit'->do_something_with):

[foo]
param1 = float
param2 = 4

[option1]
__module__ = UserDefined1
__function__ = do_something_with
param1 = str
param2 = 30.0

[doit]
param1 = float
param2 = float

[etc.]


With the user's main having the following in it:

    from UserDefined1 import some_function
    def foo(): [etc.]
    def doit(): [etc.]


I'm afraid my previous listing of the config file could cause confusion.

James


From stargaming at gmail.com  Wed Aug  1 07:59:32 2007
From: stargaming at gmail.com (Stargaming)
Date: 01 Aug 2007 11:59:32 GMT
Subject: Python end of file marker similar to perl's __END__
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
	<1185947061.985093.306840@22g2000hsm.googlegroups.com>
	<46b023ee$0$6528$9b622d9e@news.freenet.de>
	<mailman.1426.1185965815.22759.python-list@python.org>
Message-ID: <46b075a4$0$7447$9b622d9e@news.freenet.de>

On Wed, 01 Aug 2007 06:56:36 -0400, Steve Holden wrote:

> Stargaming wrote:
>> On Wed, 01 Aug 2007 05:44:21 +0000, Michele Simionato wrote:
>> 
>>> On Aug 1, 5:53 am, beginner <zyzhu2... at gmail.com> wrote:
>>>> Hi All,
>>>>
>>>> This is just a very simple question about a python trick.
>>>>
>>>> In perl, I can write __END__ in a file and the perl interpreter will
>>>> ignore everything below that line. This is very handy when testing my
>>>> program. Does python have something similar?
>>> I wished from something like that. What you can do at the moment, is
>>> to comment or triple quote the code you don't want to run.
>> 
>> Or, if in a function body, you could insert a `return` statement. When
>> in top-level code, invoking `sys.exit` (or exit/quit) can do the trick.
>> A ``raise Exception`` might help, too, but could be kinda distracting
>> sometimes.
>> 
>> So, there is no general purpose solution as perl has it (I guess that
>> __END__ works everywhere at least), rather different solutions for
>> different cases.
> 
> I think you have missed the point. A return statement or call to
> sys.exit() doesn't remove the requirement that the rest ofthe source
> file be legal Python. In a Perl program you can put anything you like
> after __END__.
> 
> regards
>   Steve

That was my point actually. No, there is no such general purpose solution 
as in perl, but if he just wanted to quit execution (to, eg., not commit 
changes to his database), this would be the way to go. Multiline strings 
are the other way to include (nearly) arbitrary data.


From jipksaman at gmail.com  Sun Aug 26 14:46:07 2007
From: jipksaman at gmail.com (abdo911)
Date: Sun, 26 Aug 2007 11:46:07 -0700
Subject: YOU MUST KNOW THIS MAN
Message-ID: <1188153967.206797.224850@d55g2000hsg.googlegroups.com>


Allow me to share with you here some information about one man his
name is muhammad.

In The Name Of Allaah,
Most Gracious, Most Merciful
YOU MUST KNOW THIS MAN
MUHAMMAD
(May peace and blessings of God Almighty be upon him)
You may be an atheist or an agnostic; or you may belong to anyone of
the religious denominations that exist in the world today. You may be
a Communist or a believer in democracy and freedom. No matter what you
are, and no matter what your religious and political beliefs, personal
and social habits happen to be - YOU MUST STILL KNOW THIS MAN!
He was by far the most remarkable man that ever set foot on this
earth. He preached a religion, founded a state, built a nation, laid
down a moral code, initiated numberless social and political reforms,
established a dynamic and powerful society to practice and represent
his teachings, and completely revolutionized the worlds of human
thought and action for all times to come.
HIS NAME IS MUHAMMAD, peace and blessings of Almighty God be upon him
and he accomplished all these wonders in the unbelievably short span
of twenty-three years.
Muhammad, peace and blessings of God Almighty be upon him was born in
Arabia on the 20th of August, in the year 570 of the Christian era,
and when he died after 63 years, the whole of the Arabian Peninsula
had changed from paganism and idol-worship to the worship of One God;
from tribal quarrels and wars to national solidarity and cohesion;
from drunkenness and debauchery to sobriety and piety; from
lawlessness and anarchy to disciplined living; from utter moral
bankruptcy to the highest standards of moral excellence. Human history
has never known such a complete transformation of a people or a place
before or since!
The Encyclopedia Britannica calls him "the most successful of all
religious personalities of the world". Bernard Shaw said about him
that if Muhammad were alive today he would succeed in solving all
those problems which threaten to destroy human civilization in our
times. Thomas Carlysle was simply amazed as to how one man, single-
handedly, could weld warring tribes and wandering Bedouins into a most
powerful and civilized nation in less than two decades. Napoleon and
Gandhi never tired of dreaming of a society along the lines
established by this man in Arabia fourteen centuries ago.
Indeed no other human being ever accomplished so much, in such diverse
fields of human thought and behavior, in so limited a space of time,
as did Muhammad, peace and blessings of God Almighty be upon him. He
was a religious teacher, a social reformer, a moral guide, a political
thinker, a military genius, an administrative colossus, a faithful
friend, a wonderful companion, a devoted husband, a loving father -
all in one. No other man in history ever excelled or equaled him in
any of these difficult departments of life.
The world has had its share of great personalities. But these were one
sided figures who distinguished themselves in but one or two fields
such as religious thought or military leadership. None of the other
great leaders of the world ever combined in himself so many different
qualities to such an amazing level of perfection as did Muhammad,
peace and blessings of God Almighty be upon him.
The lives and teachings of other great personalities of the world are
shrouded in the mist of time. There is so much speculation about the
time and the place of their birth, the mode and style of their life,
the nature and detail of their teachings and the degree and measure of
their success or failure that it is impossible for humanity today to
reconstruct accurately and precisely the lives and teachings of those
men.
Not so this man Muhammad, peace and blessings of God Almighty be upon
him. Not only was he born in the fullest blaze of recorded history,
but every detail of his private and public life, of his actions and
utterances, has been accurately documented and faithfully preserved to
our day. The authenticity of the information so preserved is vouched
for not only by faithful followers but also by unbiased critics and
open-minded scholars.
At the level of ideas there is no system of thought and belief-secular
or religious, social or political-which could surpass or equal ISLAAM-
the system which Muhammad peace and blessings of God Almighty be upon
him propounded. In a fast changing world, while other systems have
undergone profound transformations, Islaam alone has remained above
all change and mutation, and retained its original form for the past
1400 years. What is more, the positive changes that are taking place
in the world of human thought and behavior, truly and consistently
reflect the healthy influence of Islam in these areas. Further, it is
not given to the best of thinkers to put their ideas completely into
practice, and to see the seeds of their labors grow and bear fruit, in
their own lifetime. Except of course, Muhammad, peace and blessings of
God Almighty be upon him, who not only preached the most wonderful
ideas but also successfully translated each one of them into practice
in his own lifetime. At the time of his death his teachings were not
mere precepts and ideas straining for fulfillment, but had become the
very core of the life of tens of thousands of perfectly trained
individuals, each one of whom was a marvelous personification of
everything that Muhammad peace and blessings of God Almighty be upon
him taught and stood for. At what other time or place and in relation
to what other political, social, religious system, philosophy or
ideology-did the world ever witness such a perfectly amazing
phenomenon?
Indeed no other system or ideology secular or religious, social or
political, ancient or modern - could ever claim the distinction of
having been put into practice in its fullness and entirety EVEN ONCE
in this world, either before or after the death of its founder. Except
of course ISLAAM, the ideology preached by Muhammad, peace and
blessings of God Almighty be upon him which was established as a
complete way of life by the teacher himself, before he departed from
this world. History bears testimony to this fact and the greatest
skeptics have no option but to concede this point.
In spite of these amazing achievements and in spite of the countless
absolutely convincing and authentic miracles performed by him and the
phenomenal success which crowned his efforts, he did not for a moment
claim to be God or God's incarnation or Son - but only a human being
who was chosen and ordained by God to be a teacher of truth to man
kind and a complete model and pattern for their actions.
He was nothing more or less than a human being. But he was a man with
a noble and exalted mission-and his unique mission was to unite
humanity on the worship of ONE AND ONLY GOD and to teach them the way
to honest and upright living in accordance with the laws and commands
of God. He always described himself as A MESSENGER AND SERVANT OF GOD,
and so indeed every single action and movement of his proclaimed him
to be.
A world which has not hesitated to raise to Divinity individuals whose
very lives and missions have been lost in legend and who historically
speaking did not accomplish half as much-or even one tenth-as was
accomplished by Muhammad, peace and blessings of God Almighty be upon
him should stop to take serious note of this remarkable man's claim to
be God's messenger to mankind.
Today after the lapse of some 1400 years the life and teachings of
Prophet Muhammad, peace and blessings of God Almighty be upon him,
have survived without the slightest loss, alteration or interpolation.
Today they offer the same undying hope for treating mankind's many
ills which they did when Prophet Muhammad, peace and blessings of God
Almighty be upon him, was alive. This is our honest claim and this is
the inescapable conclusion forced upon us by a critical and unbiased
study of history.
The least YOU should do as a thinking, sensitive, concerned human
being is to stop for one brief moment and ask yourself: Could it be
that these statements, extraordinary and revolutionary as they sound,
are really true? Supposing they really are true, and you did not know
this man Muhammad, peace and blessings of God Almighty be upon him or
hear about his teachings? Or did not know him well and intimately
enough to be able to benefit from his guidance and example? Isn't it
time you responded to this tremendous challenge and made some effort
to know him? It will not cost you anything but it may well prove to be
the beginning of a completely new era in your life.
Come, let us make a new discovery of the life of this wonderful man
Muhammad, peace and blessings of God Almighty be upon him the like of
whom never walked on this earth, and whose example and teachings can
change YOUR LIFE and OUR WORLD for the better. May God shower His
choicest blessings upon him!
Written by S.H. Pash



From fdu.xiaojf at gmail.com  Sat Aug 11 02:55:24 2007
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Sat, 11 Aug 2007 14:55:24 +0800
Subject: The Future of Python Threading
In-Reply-To: <1186782710.600889.245930@j4g2000prf.googlegroups.com>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>	<1i2njyp.1o6yslqe7ff47N%luc@honk-honk.com>
	<1186782710.600889.245930@j4g2000prf.googlegroups.com>
Message-ID: <46BD5D5C.2060809@gmail.com>

Justin T. wrote:
> On Aug 10, 2:02 pm, l... at honk-honk.com (Luc Heinrich) wrote:
>> Justin T. <jmtull... at gmail.com> wrote:
>>> What these seemingly unrelated thoughts come down to is a perfect
>>> opportunity to become THE next generation language.
>> Too late: <http://www.erlang.org/>
>>
>> :)
>>
>> --
>> Luc Heinrich
> 
> Uh oh, my ulterior motives have been discovered!
> 
> I'm aware of Erlang, but I don't think it's there yet. For one thing,
> it's not pretty enough. It also doesn't have the community support
> that a mainstream language needs. I'm not saying it'll never be
> adequate, but I think that making python into an Erlang competitor
> while maintaining backwards compatibility with the huge amount of
> already written python software will make python a very formidable
> choice as languages adapt more and more multi-core support. Python is
> in a unique position as its actually a flexible enough language to
> adapt to a multi-threaded environment without resorting to terrible
> hacks.
> 
> Justin
> 
Multi-core or multi-CPU computers are more and more popular, especially in 
scientific computation. It will be a great great thing if multi-core support 
can be added to python.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 24 03:50:09 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 24 Aug 2007 09:50:09 +0200
Subject: beginner, idomatic python 2
In-Reply-To: <46ce8d0c$0$410$426a74cc@news.free.fr>
References: <13csjmeaoqh9le3@corp.supernews.com>
	<46ce8d0c$0$410$426a74cc@news.free.fr>
Message-ID: <46ce8d75$0$410$426a74cc@news.free.fr>

Bruno Desthuilliers a ?crit :
(snip)
 > and ALL_LOWER

That's 'ALL_UPPER', of course :(

> for symbolic (pseudo) 
> constants.
> 


From zyzhu2000 at gmail.com  Fri Aug 24 01:44:50 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Fri, 24 Aug 2007 05:44:50 -0000
Subject: List Comprehension Question: One to Many Mapping?
In-Reply-To: <1187934068.998593.201240@x40g2000prg.googlegroups.com>
References: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
	<1187934068.998593.201240@x40g2000prg.googlegroups.com>
Message-ID: <1187934290.472868.36770@q3g2000prf.googlegroups.com>

On Aug 24, 12:41 am, Davo <davb... at gmail.com> wrote:
> On Aug 23, 9:24 pm, beginner <zyzhu2... at gmail.com> wrote:
>
>
>
>
>
> > Hi All,
>
> > How do I map a list to two lists with list comprehension?
>
> > For example, if I have x=[ [1,2], [3,4] ]
>
> > What I want is a new list of list that has four sub-lists:
>
> > [[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]]
>
> > [1,2] is mapped to [1,2] and [f(1), f(2)] and [3,4] is mapped to
> > [3,4], [f(3), f(4)].
>
> > I just can't find any way to do that with list comprension. I ended up
> > using a loop (untested code based on real code):
>
> > l=[]
> > for y in x:
> >    l.append(y)
> >    l.append([f(z) for z in y])
>
> > Thanks,
> > Geoffrey
>
> This may be what you want:
>
> l = [[y, [f(z) for z in y]] for y in x]
>
> But It's a bit dense.  How about:
> l=[]
> for y in x:
>     Fy = [f(z) for z in y]
>     l.extend([y, Fy])
>
> -- David- Hide quoted text -
>
> - Show quoted text -

This is exactly what I was looking for. Thanks.



From vedrandekovic at v-programs.com  Wed Aug 22 15:18:15 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Wed, 22 Aug 2007 12:18:15 -0700
Subject: redirect or cover .bat log
In-Reply-To: <1187791309.427046.22400@q3g2000prf.googlegroups.com>
References: <1187764689.836375.212730@z24g2000prh.googlegroups.com>
	<5j26bvF3s7lbpU2@mid.uni-berlin.de>
	<1187767578.925671.107000@q4g2000prc.googlegroups.com>
	<5j2br6F3r2avsU1@mid.uni-berlin.de>
	<1187787876.962883.66970@r34g2000hsd.googlegroups.com>
	<1187791309.427046.22400@q3g2000prf.googlegroups.com>
Message-ID: <1187810295.951965.239300@m37g2000prh.googlegroups.com>

On 22 kol, 16:01, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
> On 22 ago, 10:04, vedrandeko... at v-programs.com wrote:
>
>
>
> > > >> > e.g I need run my my_scripts_setup.bat that contain:
>
> > > >> > python myscript_setup.py py2exe
>
> > > >> > Can I cover or redirect log of that process into my wx program?
> > > >> > I'am using Windows XP SP2, and Python 2.5.
>
> Try the subprocess module. For the single line command you posted
> earlier, you don't even need the bat file:
>
> import subprocess
> p = subprocess.Popen(["python", "myscript_setup.py", "py2exe"],
> stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
> p.wait()
> output_from_process = p.stdout.readlines()
>
> This would be fine if executing the script takes relatively a short
> time and doesn't generate so many output lines; there are other
> examples in the subprocess module documentation <http://
> docs.python.org/lib/module-subprocess.html>
>
> --
> Gabriel Genellina

Hi,

This works fine.
Thanks!



From bignose+hates-spam at benfinney.id.au  Thu Aug 30 23:18:40 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 31 Aug 2007 13:18:40 +1000
Subject: strings (dollar.cents) into floats
References: <mailman.140.1188483282.28954.python-list@python.org>
	<877incd20i.fsf@benfinney.id.au>
	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <87ps14bddb.fsf@benfinney.id.au>

Wildemar Wildenburger <lasses_weil at klapptsowieso.net> writes:

> But what use is there for floats, then? When is it OK to use them?

When one is willing to sacrifice decimal precision for speed of
calculation, and doesn't need the numbers to stay precise. E.g. when
performing millions of calculations on real-world (analogue)
measurements.

-- 
 \                "Too many Indians spoil the golden egg."  -- Sir Joh |
  `\                                                   Bjelke-Petersen |
_o__)                                                                  |
Ben Finney


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug  1 06:01:29 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 01 Aug 2007 12:01:29 +0200
Subject: standalone process to interact with the web
In-Reply-To: <1185904623.754078.198910@e9g2000prf.googlegroups.com>
References: <1185899130.331170.151980@e16g2000pri.googlegroups.com>
	<mailman.1375.1185900147.22759.python-list@python.org>
	<1185904623.754078.198910@e9g2000prf.googlegroups.com>
Message-ID: <46b059ed$0$31743$426a74cc@news.free.fr>

beginner a ?crit :
> Hi Steve,
> 
> On Jul 31, 11:42 am, Steve Holden <st... at holdenweb.com> wrote:
>> beginner wrote:
>>> Hi Everyone,
>>> I am looking for a way to allow a standalone python process to easily
>>> interactive with a few web pages. It has to be able to easily receive
>>> requests from the web and post data to the web.
>>> I am thinking about implementing a standalone soap server, but I am
>>> not sure which library is good.
>>> Any suggestions?
>>> Thanks a lot,
>>> Geoffrey
>> Look nor further than mechanize -
>>
(snip)

> This seems to be an HTTP client library. It is very interesting, but
> is not what I need. I am looking for something that can provide
> service to web pages. For example, when a browser requests a web page,
> the web page is going to send a few requests to my server. My server
> then is going to respond, and the web page takes the response and
> format it in human readable form.

IOW, you want to embed a web server in your application.





From bthate at gmail.com  Sat Aug 25 15:59:32 2007
From: bthate at gmail.com (bthate)
Date: Sat, 25 Aug 2007 19:59:32 -0000
Subject: GOZERBOT 0.7.1 released
Message-ID: <1188071972.308657.217650@y42g2000hsy.googlegroups.com>

GOZERBOT 0.7.1 released

- This release fixes the following bugs:

    * the udp encryption was fixed

    * a newline injection bug in the RSS plugin was discovered at CCC
camp and fixed.          credits for finding this bug go to Astro-

- version 0.7.1 can be downloaded at http://gozerbot.org. for
upgrading see doc/UPGRADE.

- debian users can find 0.7.1 in unstable

- about gozerbot (from http://wiki.gozerbot.org):

Gozerbot is an Jabber|IRC bot, written in the Python programming
language. Gozerbot runs on Unix/Unix like operating systems. It
requires a Shell and a Python interpreter version 2.4 or higher

features:
    *  user management by userhost
    * fleet, combine multiple bots
    * relaying between fleet bots
    * various list types
    * chain commands
    * builtin webserver
    * collective, connect bots through their webserver
    * easily extendible through plugins
    * DCC support
    * RSS support
    * database support
    * jabbersupport
    * karma, quotes, items, todo and shoppinglists
    * easy update of development versions (hg,svn) to the latest code
with just one irc command
    * other stuff

the gozerbot development team



From gregpinero at gmail.com  Sun Aug  5 12:56:31 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Sun, 05 Aug 2007 16:56:31 -0000
Subject: Best way to capture output from an exec'ed (or such) script?
In-Reply-To: <mailman.1635.1186307437.22759.python-list@python.org>
References: <1186084086.212050.264270@q3g2000prf.googlegroups.com>
	<mailman.1547.1186097565.22759.python-list@python.org>
	<1186154066.529360.90260@q75g2000hsh.googlegroups.com>
	<1186264336.502429.232840@r34g2000hsd.googlegroups.com>
	<mailman.1635.1186307437.22759.python-list@python.org>
Message-ID: <1186332991.527508.225630@57g2000hsv.googlegroups.com>

On Aug 5, 5:50 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Sat, 04 Aug 2007 18:52:16 -0300, gregpin... at gmail.com
> <gregpin... at gmail.com> escribi?:
>
> >> On Aug 2, 7:32 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:>
> >> If your web server is multithreaded (or you use some other way to
> >> process
> >> > many simultaneous requests) you have to be more careful - remember
> >> that
> >> > sys.stdout is global, you must find a way to distinguish between
> >> output
> >> >  from different processes all going into the same collector.
>
> > I'm actually worried about this now.  Does anyone know of any
> > potential solutions?  Anything to at least get me started?
>
> You can use threading.currentThread() to distinguish between threads, and
> a Lock (or RLock) to ensure the output doesn't get mixed:
>
> def write(msg):
>      t = time.strftime("%x %X", time.localtime())
>      who = threading.currentThread().getName()
>      line = "%s (%-15.15s) %s\n" % (t, who, msg)
>      OutputDebugString("%s (%-15.15s) %s\n" % (t, who, msg))
>      loglock.acquire()
>      try:
>          with logfile() as f:
>              f.write(line)
>      finally:
>          loglock.release()
>
> --
> Gabriel Genellina


Thanks, Gabriel.  I'm not actually making the threads myself though.
Rather it's a simple single threaded script running under FastCGI.
Would your method still work?  I don't know too much about how FastCGI
works.  Perhaps that's where I should start.

-Greg



From mattheww at chiark.greenend.org.uk  Wed Aug 22 12:49:39 2007
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 22 Aug 2007 17:49:39 +0100 (BST)
Subject: Eval and raw string ??
References: <1187798806.029598.264740@q3g2000prf.googlegroups.com>
Message-ID: <ZmF*iPXSr@news.chiark.greenend.org.uk>

Mark  <creechm at gmail.com> wrote:
> Eval() doesn't seem to recognize the r'string' format. Is there a way
> around this.
> Example:
> If I input: ---------> eval("r'C:\tklll\ndfd\bll'")
> I get the output:
>
> Traceback (most recent call last):
>   File "<pyshell#3>", line 1, in <module>
>     eval("r'C:\tklll\ndfd\bll'")
>   File "<string>", line 1
>     r'C:	klll
>       	    ^
> SyntaxError: EOL while scanning single-quoted string
>
> The same principle applies for exec.


The \n is being converted to a newline before the string is passed to eval.

Try eval(r"r'C:\tklll\ndfd\bll'")

-M-


From zunbeltz at gmail.com  Fri Aug 10 03:40:17 2007
From: zunbeltz at gmail.com (zunbeltz at gmail.com)
Date: Fri, 10 Aug 2007 00:40:17 -0700
Subject: float to string with different precision
Message-ID: <1186731617.128913.279360@m37g2000prh.googlegroups.com>

Hi,

I have to print float numbers to a file. Each float should be 5
characters in width (4 numbers and the decimal point).
My problem is that I do not now how to specify float to have different
numbers of decimals. For example

5.32 -> 5.320
10.356634 -> 10.357
289.234 -> 289.2

In the string formating operations only fixed number of decimal digits
is allow.

Thanks in advance for the help,

Zunbeltz



From luc at honk-honk.com  Fri Aug 10 17:02:50 2007
From: luc at honk-honk.com (Luc Heinrich)
Date: Fri, 10 Aug 2007 23:02:50 +0200
Subject: The Future of Python Threading
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
Message-ID: <1i2njyp.1o6yslqe7ff47N%luc@honk-honk.com>

Justin T. <jmtulloss at gmail.com> wrote:

> What these seemingly unrelated thoughts come down to is a perfect
> opportunity to become THE next generation language.

Too late: <http://www.erlang.org/>

:)

-- 
Luc Heinrich


From jstroud at mbi.ucla.edu  Wed Aug 22 19:32:53 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 22 Aug 2007 23:32:53 GMT
Subject: Learning Python using a book based on version 1.5
In-Reply-To: <1187814437.775758.159510@e9g2000prf.googlegroups.com>
References: <1187814437.775758.159510@e9g2000prf.googlegroups.com>
Message-ID: <FI3zi.10911$3x.7829@newssvr25.news.prodigy.net>

dogatemycomputer at gmail.com wrote:
> Greetings,
> 
> A friend of mine dropped off a copy of Sams Teach Yourself Python in
> 24 Hours published in 2000.  I skimmed the first couple of chapters
> looking for the interpreter version and the book was based on version
> Python version 1.5.
> 
> Is this book still relevant?   Should I toss it and look for something
> newer?
> 
> Any thoughts would be appreciated.
> 
> Best Regards,
> Dave
> 

If you want to make a decision based on a quorum, I would suggest to not 
bother with that book. Yes the SAMS TY books are usually great 
(especially anything Laura Lemay), but you if you use a 1.5 book, you 
will be learning some stuff you will *need* to unlearn at the expense of 
learning things you should know.

I think the online tutorial is the way to go, or the newest Learning 
Python from Lutz. After that, check out TPIP (Mertz) or the Programming 
Python book from Lutz (for a global-esque view of the python world). 
Maybe even think about the Cookbook (ed. Martelli).

Dive-Into-Python starts with one of those "Don't worry about what all 
this means" examples, which I tend to hate and so I never got passed the 
first example--it may get better as you go judging from all of its 
proponents.

James


From iclark at mail.ewu.edu  Thu Aug  2 16:57:29 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Thu, 02 Aug 2007 13:57:29 -0700
Subject: Bug in execfile?
In-Reply-To: <f8t80e$gvh$1@sea.gmane.org>
References: <f8t80e$gvh$1@sea.gmane.org>
Message-ID: <f8tgfq$e2u$1@sea.gmane.org>

Fernando Perez wrote:
> Hi all,
> 
> (snip)
> 
> I'm really, really puzzled by this.  From reading the execfile() docs, I had
> the hunch to change the call to:
> 
>     execfile(fname,{})
> 
> and now the problem disappears, so I can keep on working.
> 
> But I'm still very bothered by the fact that changing that first call 'if 0'
> to 'if 1' has any effect on the later call to runscript().  That really
> doesn't feel right to me...

First an example:

#foo.py

from math import sin

#EOF

 >>> dir()
['__builtins__', '__doc__', '__name__']
 >>> execfile('foo.py')
 >>> dir()
['__builtins__', '__doc__', '__name__', 'sin']

New session:
 >>> dir()
['__builtins__', '__doc__', '__name__']
 >>> execfile('foo.py', {})
 >>> dir()
['__builtins__', '__doc__', '__name__']
 >>> help(execfile)
Help on built-in function execfile in module __builtin__:

execfile(...)
     execfile(filename[, globals[, locals]])

     Read and execute a Python script from a file.
     The globals and locals are dictionaries, defaulting to the current
     globals and locals.  If only globals is given, locals defaults to 
      it.

By default execfile works on the *current* namespace. So exec'ing a 
script that modified it's global namespace will also modify the global 
namespace of the calling module (see my first example). If you specify a 
dictionary then execfile will use that as the global and local (maybe) 
namespace of the file that it is running (hence the global namespace of 
the calling module stays in tact per the second example). That is why 
execfile(fname, {}) works for you, it doesn't pollute your current 
namespace. It uses a different namespace when calling the file then is 
being used by the calling module.

No idea why your function failed though. *shrug*

Ian



From xah at xahlee.org  Sat Aug  4 21:27:24 2007
From: xah at xahlee.org (Xah Lee)
Date: Sat, 04 Aug 2007 18:27:24 -0700
Subject: The Modernization of Emacs: keyboard shortcuts pain
In-Reply-To: <1185282252.520022.20780@z28g2000prd.googlegroups.com>
References: <1182093200.598418.218620@e9g2000prf.googlegroups.com>
	<1182272678.877166.209640@j4g2000prf.googlegroups.com>
	<1184764620.778937.264760@m37g2000prh.googlegroups.com>
	<1185282252.520022.20780@z28g2000prd.googlegroups.com>
Message-ID: <1186277244.045554.308420@i13g2000prf.googlegroups.com>

The following article a extended version of previous post.
A HTML version can be found at
http://xahlee.org/emacs/emacs_kb_shortcuts_pain.html

-----------------------------------
WHY EMACS'S KEYBOARD SHORTCUTS ARE PAINFUL

Xah Lee, 2007-07

A important aspect in designing a keyboard shortcut set, for a
application that has intensive, repetitive, prolonged human-machine
interaction (such as coding and text editing), is to consider
ergonomic principles. Specifically: allocate keyboard shortcuts for
the most frequently used commands, and, the top most frequently used
commands should have most easily-pressed keystrokes. For example, they
should be on the home row.

This article shows why Emacs's keyboard shortcut set are the most
ergonomically unsound.

THE SWAPPING OF CONTROL AND META MODIFIERS

Emacs's keyboard shortcuts is very inefficient. The primary cause is
because, emacs's keyboard shortcuts are designed with a keyboard that
practically has the Ctrl and Alt key positions swapped.
Space Cadet keyboard

above: The Space-cadet keyboard (Source?, 2007-07) .

The common keyboard used around emacs era in the 1980s are those
keyboards from Lisp Machines?. (see Space-cadet keyboard?) The
keyboard on lisp machines have the Control key right besides the space
bar (similar to the position of Alt keys on PC keyboards), and Meta to
the left of Control. So, the Control key is right under the thumb, and
the Meta is secondary to Control. This is why, the shortcuts for the
most used commands in emacs involve the Control key instead of the
Meta key. (e.g. The cursor movements: C-p, C-n, C-f, C-b, C-a, C-e,
the cut/paste/undo C-w, C-y, C-/, the kill-line C-k, the mark C-SPC,
the search C-s.) Lisp Machine's keyboards fell out of use alone with
Lisp Machines. Since the 1990s, the IBM PC keyboard? (and its
decedents) becomes the most popular and is used by more than 99% of
personal computers today. The PC keyboard does not have Meta key but
have Alt instead, which is practically used as Meta for emacs. The
Ctrl and Alt key's position are essentially swapped from the Control
and Meta on the Lisp Machine's keyboards. Emacs however, did not
change its keyboard shortcut set by switching the commands that are
mapped to the Control and Meta keys. This makes emacs keyboard
shortcuts very painful, and the frequent need to press the far-away
Control key makes the Emacs Pinky syndrome. (Many emacs-using
programer celebrities have injured their hands with emacs. (e.g.
Richard Stallman?, Jamie Zawinski?), and emacs's Ctrl and Meta
combinations are most cited as the major turn-off to potential users
among programers)

THE CHOICE OF KEYS

The shortcut's key choices are primarily based on first letter of the
commands, not based on key position and finger strength or ease of
pressing the key. For example, the single char cursor moving shortcuts
(C-p previous-line ?, C-n next-line ?, C-b backward-char ?, C-f
forward-char ?) are scattered around the keyboard with positions that
are most difficult to press. (these shortcuts all together accounts
for 43% of all commands executed by a keyboard shortcut) Of these, the
most frequently used is C-n (next-line), which accounts for 20% of all
shortcut calls, but is assigned to the letter n, positioned in the
middle of the keyboard, which is one of the most costy key to press.
Similarly, the second most used among these is the C-p (previous-
line), accounting for 16% of all shortcut command calls, is located in
a position above the rigth hand's pinky, also one of the most costy
key to press.

(Here we assumes the QWERTY keyboard layout. On the Dvorak layout, it
is about as bad.)

OUTDATED COMMANDS

A significant portion of emacs's major shortcuts (those with M-?key?
or C-?key?) are mapped to commands that are almost never used today.
Some of these occupies the most precious space (Home row with Meta:
e.g. M-s (center-line), M-j (indent-new-comment-line), M-k (kill-
sentence)). Most programer who have used emacs for years never use
these commands. For example:

digit-argument, M-1 to M-9
negative-argument, M--

move-to-window-line, M-r
center-line, M-s
transpose-words, M-t
tab-to-tab-stop, M-i

M-g prefix, M-g
indent-new-comment-line, M-j
tmm-menubar, M-'

zap-to-char, M-z
back-to-indentation, M-m
tags-loop-continue, M-,
find-tag, M-.

NO EMPLOYMENT OF THE SHIFT KEY

For historical reasons, emacs do not use any keybindings involving the
Shift with a letter. (e.g. there's no ?meta shift a?, or ?control
shift a?) This is so because in early computing environment, such key
combination cannot be distinguished, due to a practical combination of
ASCII?, Computer terminal?, telnet?.

Today, however, employing the Shift key as part of a shortcut with
other modifiers is common and convenient. For example, on Mac OS X,
Undo and Redo are Cmd+Z and Cmd+Shift+Z, Save and Save As are Cmd+S
and Cmd+Shift+S. On Mac and Windows, moving to next/previous field/
window/application often use the Shift key for reversing direction. In
text editing on both Mac and Windows, a modifier key with a arrow key
will move cursor by word/paragraph, and with Shift down will select
them while moving.

Using the Shift key as a reverse operation is very easy to remember,
and doesn't take another precious shortcut letter. By not using the
Shift key, commands with a logical reverse operation necessarily have
to find other key space, and overall making the shortcut set more
difficult to remember, or scattered, or more difficult to press.

A FLAW IN KEYBINDING POLICY

Any major software, maintains a guide for the developers about the
choices of keyboard shortcuts, so that the shortcuts will be
consistant. Emacs has this in its Emacs Lisp manual: Elisp Manual: Key-
Binding-Conventions.

This guide, indicates that the only key space reserved for users to
define, are the function keys F5 to F9, and key stroke sequence
starting with Ctrl+c followed by a single letter key.

This is a severe restraint to the utility of customized shortcuts. F5
to F9 are only 6 keys. The key sequence starting with C-c followed by
a letter, is a difficult sequence to execute, and there are only 26
spaces there.

The function keys, F1 to F12, are very good candidates for user
defined shortcut space, similarly for the digit key shortcuts, 0 to 9.
These series of key space can be multiplied by any combination of
modifiers of Control, Meta, Shift. For example, a user might define
the them to insert various templates, headers/footers, a system of
customized HTML/XML tags. Or, she might assign them to various special
emacs modes such as dired, shell, ftp, email, calendar, calc,
*scratch*, make-frame-command (Open a new window), insert signature.

It seems too drastic a policy, to limit user defined keys to only F5
to F9, and key sequence of Control+c followed by a single letter key.

EPILOGUE: FAILURE TO CHANGE

Today, most commonly used keyboard shortcuts have been somewhat
informally standardized. For example, C/X/V is for Copy/Cut/Paste. O
is for Open. S is for Save, Shift-S is for Save As. P is for Print. F
is for Find/Search. Tab is for next, Shift tab for previous. These are
common conventions today in every application across Microsoft Windows
and Macintosh (and most Linuxes).

These shortcuts conventions are primarily brought about by Apple
Computer Inc's Human interface guidelines? and IBM's Common User
Access? in the 1990s.

In the early 1990s, DOS era software, each application has its own
scheme of shortcuts. The following is a excerpt from the Wikipedia
article on Common User Access?:

CUA was a detailed specification and set strict rules about how
applications should look and function. Its aim was in part to bring
about harmony between MS-DOS applications, which until then had
implemented totally different user interfaces.

Examples:

    * In WordPerfect, the command to open a file was [F7], [3].
    * In Lotus 1-2-3, a file was opened with [/] (to open the menus),
[W] (for Workspace), [R] (for Retrieve).
    * In Microsoft Word, a file was opened with [Esc] (to open the
menus), [T] (for Transfer), [L] (for Load).
    * In WordStar, it was [Ctrl]+[K]+[O].
    * In Emacs, a file was opened with [Ctrl]+[x] followed by [Ctrl]+
[f] (for find-file).

Some programs used [Esc] to cancel an action, some used it to complete
one; WordPerfect used it to repeat a character. Some programs used
[End] to go to the end of a line, some used it to complete filling in
a form. [F1] was often help but in WordPerfect that was [F3]. [Ins]
sometimes toggled between overtype and inserting characters, but some
programs used it for ?paste?.

Thus, every program had to be learned individually and its complete
user interface memorized. It was a sign of expertise to have learned
the UIs of dozens of applications, since a novice user facing a new
program would find their existing knowledge of a similar application
absolutely no use whatsoever.

Commercial software have updated themselves with time (or went
extinct), but emacs has not.

  Xah
  xah at xahlee.org
? http://xahlee.org/



From antroy at gmail.com  Wed Aug  8 07:10:32 2007
From: antroy at gmail.com (Ant)
Date: Wed, 08 Aug 2007 04:10:32 -0700
Subject: Seek the one billionth line in a file containing 3 billion lines.
In-Reply-To: <46b996b1$0$12384$426a74cc@news.free.fr>
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
	<7xzm12o7o7.fsf@ruckus.brouhaha.com>
	<mailman.1729.1186557385.22759.python-list@python.org>
	<46b996b1$0$12384$426a74cc@news.free.fr>
Message-ID: <1186571432.901348.138990@g4g2000hsf.googlegroups.com>

On Aug 8, 11:10 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> Jay Loden a ?crit :
> (snip)
>
> > If we just want to iterate through the file one line at a time, why not just:
>
> > count = 0
> > handle = open('hugelogfile.txt')
> > for line in handle.xreadlines():
> >     count = count + 1
> >     if count == '1000000000':
> >         #do something
>
> for count, line in enumerate(handle):
>      if count == '1000000000':
>          #do something

You'd get better results if the test were:

if count == 1000000000:

Or probably even:

if count == 999999999:

Since the 1 billionth line will have index 999999999.

Cheers,

--
Ant...

http://antroy.blogspot.com/








From timid.gentoo at gmail.com  Sun Aug 12 22:16:06 2007
From: timid.gentoo at gmail.com (_spitFIRE)
Date: Sun, 12 Aug 2007 21:16:06 -0500
Subject: retrieving ATOM/FSS feeds
Message-ID: <f9oecg$249v$1@sxnews1.qg.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

  I'm using feedparser library to parser ATOM/RSS feeds. However, I don't
get the entire post! but only summaries! How do I retrieve the entire feed?
I believe that the parser library should have support for doing that or the
specification should detail how it can be done? Or should I simply get the
feed link and do HTML scraping?


- --
_ _ _]{5pitph!r3}[_ _ _
__________________________________________________
?I'm smart enough to know that I'm dumb.?
  - Richard P Feynman
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFGv77mA0th8WKBUJMRAk80AJ9VCIBXIZVhuPtT7bfY4dRrM15H+gCeOVJG
77Zbl8jmWPsp4QjP85Lbwbc=
=Ho+8
-----END PGP SIGNATURE-----


From johnmasters at oxtedonline.net  Thu Aug  9 16:21:22 2007
From: johnmasters at oxtedonline.net (John K Masters)
Date: Thu, 9 Aug 2007 21:21:22 +0100
Subject: Puzzled by "is"
In-Reply-To: <f9frbl$dps$1@sea.gmane.org>
References: <20070809194105.39BD11E400A@bag.python.org>
	<f9frbl$dps$1@sea.gmane.org>
Message-ID: <20070809202122.GA3970@spookie1.spookiegate>

On 15:53 Thu 09 Aug     , Steve Holden wrote:
> Dick Moores wrote:
> > At 10:46 AM 8/9/2007, Bill Scherer wrote:
> >> Dick Moores wrote:
> [...]
> >> There is only one empty tuple.
> >> Does that clear it up for you?
> > 
> > But isn't that the same as saying, "That's just the reality of 
> > Python; it is what it is."? I want to know why there is only one 
> > empty tuple, but more than one (1,).
> > 
> Why? Because.
> 
> Seriously, it's just an optimization by the implementers. There is no 
> need for more than one empty tuple, since tuples can never be modified 
> once created.
> 
> But they decided not to create (1, ) in advance. They probably knew that 
> hardly anybody would want to create that tuple ;-) [Seriously: if you 
> started trying to predict which tuples would be used you would go 
> insane, but the empty tuple is the most likely candidate].
> 
> > Also,
> >  >>> [] is []
> > False
> > 
> In that case it would definitely NOT make sense to have them the same 
> list. Python always ensures that the [] constructor creates a new list, 
> since that list may be bound to one or more variables and mutated. You 
> wouldn't want
> 
>    a = []
>    b = []
>    a.append("boo!")
> 
> to change b so it was no longer an empty list. If you wanted a and b to 
> reference the same list you would change the second statement to
> 
>    b = a
> 
> regards
>   Steve

OK fiddling around with this and reading the docs I tried:-
a = 'qqqqqqqqqq' #10 q's
b = 'qqqqqqqqqq' #10 q's
a is b
true
c = 'q' * 10
c
'qqqqqqqqqq' #10 q's
d = 'q' * 10
d
'qqqqqqqqqq' #10 q's
c is d
false

So from what I've read "==" tests for equivalence, "is" tests for identity but
that does not explain the behaviour above.

Regards, John
-- 
War is God's way of teaching Americans geography
Ambrose Bierce (1842 - 1914)


From steve at holdenweb.com  Wed Aug  8 11:48:51 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Aug 2007 11:48:51 -0400
Subject: Something in the function tutorial confused me.
In-Reply-To: <1186581124.3383.55.camel@dot.uniqsys.com>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>	<46B8626A.2070303@bigfoot.com>	<mailman.1726.1186537161.22759.python-list@python.org>	<5hsoi3F3mlni2U1@mid.individual.net>
	<f9ceb9$jsm$1@sea.gmane.org>
	<1186581124.3383.55.camel@dot.uniqsys.com>
Message-ID: <f9col1$q8i$1@sea.gmane.org>

Carsten Haese wrote:
> On Wed, 2007-08-08 at 08:52 -0400, Steve Holden wrote:
[...]
> 
> The problem is your ambiguous use of the word "assignment." In the sense
> of the Language Reference, "any assignment to y" is a simple assignment
> that always modifies a namespace and never modifies an object. In that
> sense, the mutability of None really isn't the issue.
> 
> If you use the broader sense in which "assignment" includes augmented
> assignments, the mutability of None does become relevant.
> 
> I agree that greg's delivery was unduly disrespectful, but I think he
> was making a valid point.
> 
> Hope this helps clear up the confusion.
> 
> Best regards,
> 
And this is why we should all be using the term "binding", which is 
normal in Python. I'll try to be more careful in future.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
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----------- Thank You for Reading -------------



From ricaraoz at gmail.com  Thu Aug 30 22:26:37 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Thu, 30 Aug 2007 23:26:37 -0300
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188525647.003223.199620@q5g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>	<1188364909.397692.209170@q4g2000prc.googlegroups.com>	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>	<1188369928.755777.142690@i38g2000prf.googlegroups.com>	<46d75191$0$401$426a74cc@news.free.fr>	<1188518054.298017.90610@x35g2000prf.googlegroups.com>	<46d76595$0$4013$426a74cc@news.free.fr>	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
Message-ID: <46D77C5D.10503@bigfoot.com>

Russ wrote:
> Paul Rubin wrote:
>> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
>>> FWIW, the "Eiffel and SPARK Ada folks" also "brilliantly explained"
>>> why one can not hope to "write reliable programs" without strict
>>> static declarative type-checking.
>> I don't know about Eiffel but at least an important subset of SPARK
>> Ada's DBC stuff is done using static analysis tools (not actually
>> built into the compiler as it happens) to verify statically
>> (i.e. without actually running the code) that the code fulfills the
>> DBC conditions.  I don't see any way to do that with Python
>> decorators.
> 
> Yes, thanks for reminding me about that. With SPARK Ada, it is
> possible for some real
> (non-trivial) applications to formally (i.e., mathematically) *prove*
> correctness by static
> analysis. I doubt that is possible without "static declarative type-
> checking."
> 
> SPARK Ada is for applications that really *must* be correct or people
> could die.

I've always wondered... Are the compilers (or interpreters), which take
these programs to machine code, also formally proven correct? And the OS
in which those programs operate, are they also formally proven correct?
And the hardware, microprocessor, electric supply, etc. are they also
'proven correct'?

> With all
> due respect, most (not all, but most) Python programmers never get
> near such programs
> and have no idea about how stringent the requirements are. Nor do most
> programmers
> in general, for that matter. (It's not an insult)
> 



From steve at holdenweb.com  Wed Aug 22 23:50:41 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 22 Aug 2007 23:50:41 -0400
Subject: porting vc++ project to python?
In-Reply-To: <46cc611f$0$25500$ba620dc5@text.nova.planet.nl>
References: <46cc611f$0$25500$ba620dc5@text.nova.planet.nl>
Message-ID: <faj06i$ku7$1@sea.gmane.org>

marco Starglider wrote:
> hi,
> 
> i have a very large project in visual studio2005->visual c++ in windowsxp.
> i'd like to port it, or my next project,  over to python.
> is this possible without rewriting all my code?
> are there multiple options to do this?
> my project is so large, that entirely rewriting it
> is actually no option.
> 
> regards,
> 
> m
> 
> ps i guess, it's an option to transform my current code into one or more
> python extensions/modules, and then calling them from a python core
> module?
> 
> 
Clients of mine have had very good results wrapping C++ functionality 
with Boost (http://www.boost.org/libs/python/doc/). It might work for 
you too.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From nick at craig-wood.com  Wed Aug 29 07:30:08 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 29 Aug 2007 06:30:08 -0500
Subject: Unable to read large files from zip
References: <mailman.92.1188349863.28954.python-list@python.org>
Message-ID: <slrnfdain8.aai.nick@irishsea.home.craig-wood.com>

Kevin Ar18 <kevinar18 at hotmail.com> wrote:
> 
>  I posted this on the forum, but nobody seems to know the solution: http://python-forum.org/py/viewtopic.php?t=5230
> 
>  I have a zip file that is several GB in size, and one of the files inside of it is several GB in size.  When it comes time to read the 5+GB file from inside the zip file, it fails with the following error:
>  File "...\zipfile.py", line 491, in read bytes = self.fp.read(zinfo.compress_size)
>  OverflowError: long it too large to convert to int

That will be an number which is bigger than 2**31 == 2 GB which can't
be converted to an int.

It would be explained if zinfo.compress_size is > 2GB, eg

  >>> f=open("z")
  >>> f.read(2**31)
  Traceback (most recent call last):
    File "<stdin>", line 1, in ?
  OverflowError: long int too large to convert to int

However it would seem nuts that zipfile is trying to read > 2GB into
memory at once!

>  There have been one or more posts about 2GB limits with the zipfile
>  module, as well as this bug report:
>  http://bugs.python.org/issue1189216 Also, older zip formats have a
>  4GB limit.  However, I can't say for sure what the problem is.
>  Does anyone know if my code is wrong

Your code looks OK to me.

>  or if there is a problem with Python itself?

Looks likely.

>  If Python has a bug in it

...then you have the source and you can have a go at fixing it!

Try editing zipfile.py and getting it to print out some debug info and
see if you can fix the problem.  When you have done submit the patch
to the python bug tracker and you'll get that nice glow from helping
others! Remember python is open source and is made by *us* for *us* :-)

If you need help fixing zipfile.py then you'd probably be better off
asking on python-dev.

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


From jp.eugster at googlemail.com  Tue Aug  7 10:17:19 2007
From: jp.eugster at googlemail.com (jp.eugster at googlemail.com)
Date: Tue, 07 Aug 2007 14:17:19 -0000
Subject: making a opc client in Python and use opc server Events
In-Reply-To: <1183042522.949829.19840@m36g2000hse.googlegroups.com>
References: <1180949568.305737.175350@n4g2000hsb.googlegroups.com>
	<1183042522.949829.19840@m36g2000hse.googlegroups.com>
Message-ID: <1186496239.764001.259880@57g2000hsv.googlegroups.com>

On 28 juin, 16:55, jp.eugs... at googlemail.com wrote:
> On 4 juin, 11:32, getelectro... at gmail.com wrote:
>
>
>
>
>
> > Hi all
> > I have a sample code to implement opc client in Python. i use a
> > file .py making by makepy with pythonwin for Com Interface.
> > i can get all server in machine, connect to server opc, disconnect,
> > add group, add item, read, write item in server opc.
>
> > import win32com.client  # librairie pour utiliser l'interface COM/DCOM
> > from win32com.client import gencache
> > gencache.EnsureModule('{DFB83232-A952-11D2-A46B-00C04F796375}', 0, 1,
> > 0)
>
> > for svr in opcserver.GetOPCServers():
> >     print svr
>
> > #connect to server OPC Demo Simulation from Matrikon
> > opcserver.Connect('Matrikon.OPC.Simulation.1')
>
> > # Instance object Groups
> > groups=opcserver.OPCGroups
> > #add group
> > group=groups.Add('Group1')
>
> > #instance onject Items
> > items=group.OPCItems
> > # add item in server opc
> > tem=items.AddItem('File1.item1',1)
>
> > #read item value
> > item.Read(win32com.client.constants.OPCDevice)
>
> > # write a new value
> > item.Write(100)
>
> > #read item value
> > item.Read(win32com.client.constants.OPCDevice)
> > #if no pb you have 100 :)
>
> > #Disconnect
> > #opcserver.Disconnect()
>
> > BUT, and BUT, i want to use a event from opc server for uodating item
> > value with this below class. And i don't konw how make it!!!!!!!!
> > help me plz
>
> > opcserver=win32com.client.Dispatch('OPC.Automation.1')
> > and now i want to use events from opc server. in a class:
> > class DIOPCGroupEvent:
> > class DIOPCGroupsEvent:
> > class DIOPCServerEvent:
>
> Try this:
>
> # Event Handlers
> class ServerEvent:
>         def __init__(self):
>                 print 'Init ServerEvent'
>
>         def OnServerShutDown(self, Reason):
>                 print 'OnServerShutDown', Reason
>
> class GroupEvent:
>         def __init__(self):
>                 print 'Init GroupEvent'
>
>         def OnAsyncCancelComplete(self, CancelID):
>                 print 'OnAsyncCancelComplete', CancelID
>
>         def OnDataChange(self, TransactionID, NumItems, ClientHandles,
> ItemValues, Qualities, TimeStamps):
>                 print 'OnDataChange', zip(ClientHandles, ItemValues, Qualities)
>
>         def OnAsyncReadComplete(self, TransactionID, NumItems, ClientHandles,
> ItemValues, Qualities,
>                                                  TimeStamps, Errors):
>                 print 'OnAsyncReadComplete', zip(ClientHandles, ItemValues,
> Qualities)
>
>         def OnAsyncWriteComplete(self, TransactionID, NumItems,
> ClientHandles, Errors):
>                 print 'OnAsyncWriteComplete', zip(ClientHandles, Errors)
>
> class GroupsEvent:
>         def __init__(self):
>                 print 'Init GroupsEvent'
>
>         def OnGlobalDataChange(self, TransactionID, GroupHandle, NumItems,
> ClientHandles, ItemValues,
>                                                  Qualities, TimeStamps):
>                 print 'OnGlobalDataChange', zip(ClientHandles, ItemValues,
> Qualities)
>
> opc = DispatchWithEvents('Matrikon.OPC.Automation.1', ServerEvent)
>
> groups = DispatchWithEvents(opc.OPCGroups, GroupsEvent)
> groups.DefaultGroupIsActive = True
> groups.DefaultGroupUpdateRate = 2000
>
> group1 = DispatchWithEvents(groups.Add('G1'), GroupEvent)
> group2 = DispatchWithEvents(groups.Add('G2'), GroupEvent)
> #etc ...
>
> It works for the GroupsEvents but I don't get the GroupEvent for each
> group, I may still do someting wrong..- Masquer le texte des messages pr?c?dents -
>
> - Afficher le texte des messages pr?c?dents -

In order to get the GroupEvent, you have to keep a reference to the
group you add
eg:
g1 = groups.Add('G1')
group1 = DispatchWithEvents(g1, GroupEvent)
etc...



From nair.jitendra at gmail.com  Fri Aug 24 02:12:52 2007
From: nair.jitendra at gmail.com (nair.jitendra at gmail.com)
Date: Fri, 24 Aug 2007 06:12:52 -0000
Subject: online doc bug
Message-ID: <1187935972.181274.158260@r23g2000prd.googlegroups.com>

hyperlink "site module documentation" in   Section 4.1  on page
http://docs.python.org/inst/search-path.html  leads to a nonexistent
page.

Regards
jitendra nair



From S.Mientki-nospam at mailbox.kun.nl  Fri Aug  3 07:16:51 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Fri, 03 Aug 2007 13:16:51 +0200
Subject: (no) fast boolean evaluation ? missing  NOT
In-Reply-To: <f8uu5f$i3u$1@news2.u-psud.fr>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<mailman.1545.1186095368.22759.python-list@python.org>
	<1186096979.397596.36640@e16g2000pri.googlegroups.com>
	<eb4fb$46b2f7a6$d443bb3a$21643@news.speedlinq.nl>
	<f8uu5f$i3u$1@news2.u-psud.fr>
Message-ID: <19e42$46b30d1e$d443bb3a$28080@news.speedlinq.nl>

Laurent Pointal wrote:
> Stef Mientki a ?crit :
>> <Python>
>> def Some_Function (const):
>>     print 'Ive been here', const
>>     return True
>>
>> A = True
>>
>> if A and Some_Function (4 ):
>>     print 'I knew it was True'
>> else:
>>     print 'I''ll never print this'
>> </Python>
>>
>> <Output>
>> Ive been here 4
>> I knew it was True
>> </Output
>>
>> I was expected that the function would not be called,
>> because A is True.
> 
> When using the *and* operator, the short-circuit evaluation is done if A 
> is False (no need to know the other operand, the result cannot be True). 
> But if A is True, the compiler must evaluate the second parameter to 
> know the expression result.
Sorry you're completely right,
and indeed I must have something very stupid !!

thanks very much
Stef Mientki


From deets at nospam.web.de  Wed Aug 29 08:39:23 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 29 Aug 2007 14:39:23 +0200
Subject: encoding problems
References: <46d5215b$0$411$426a74cc@news.free.fr>
	<fb3au1$v9m$1@lust.ihug.co.nz>
	<mailman.98.1188388302.28954.python-list@python.org>
Message-ID: <5jl7nrF4ouqU1@mid.uni-berlin.de>

Ricardo Ar?oz wrote:

> Lawrence D'Oliveiro wrote:
>> In message <46d5215b$0$411$426a74cc at news.free.fr>, tool69 wrote:
>> 
>>> p2.content = """Ce poste poss?de des accents : ? ? ? ?"""
>> 
>> My guess is this is being encoded as a Latin-1 string, but when you try
>> to output it it goes through the ASCII encoder, which doesn't understand
>> the accents. Try this:
>> 
>> p2.content = u"""Ce poste poss?de des accents : ? ? ? ?""".encode("utf8")
>> 
> 
> is there a way to sort this string properly (sorted()?)
> I mean first 'a' then '?' then 'e' etc. (sorted puts accented letters at
> the end). Or should I have to provide a comparison function to sorted?

First of all: please don't hijack threads. Start a new one with your
specific question.

Second: this might be what you are looking for:

http://jtauber.com/blog/2006/01/27/python_unicode_collation_algorithm/

Didn't try it myself though.

Diez


From steve at REMOVE-THIScybersource.com.au  Sun Aug 26 00:27:21 2007
From: steve at REMOVE-THIScybersource.com.au (Steven D'Aprano)
Date: Sun, 26 Aug 2007 04:27:21 -0000
Subject: accessing keys in dict
References: <1187143106.021325.104690@l22g2000prc.googlegroups.com>
	<fap7sk$tr0$2@lust.ihug.co.nz>
	<1188068707.273263.200450@x35g2000prf.googlegroups.com>
Message-ID: <13d2099f0fp4fb4@corp.supernews.com>

On Sat, 25 Aug 2007 19:05:07 +0000, Dustan wrote:

> Never assume. A better approach would be to experiment:

I assume that you would not like it if I poked you in the eye with a 
sharp stick, but perhaps I better experiment...

*wink*

More seriously, if you wish to compare dict.keys() and dict.iterkeys(), 
iterating over them doesn't help you because it shows only the 
similarities, not the differences. But this will:

>>> d = {1:"one", 2:"two"}
>>> d.keys()
[1, 2]
>>> d.iterkeys()
<dictionary-keyiterator object at 0xb7ecd280>

dict.keys() retrieves all the keys at once, up front, whether you need 
them all or not. dict.iterkeys() returns an iterator which retrieves the 
keys lazily, only when needed. Iterating over the dict itself is the same 
as using iterkeys:

>>> iter(d)
<dictionary-keyiterator object at 0xb7ecd4a0>


Performance-wise, the difference for small dicts may be trivial:

>>> d = dict(zip(xrange(1000), xrange(1000)))
>>> import timeit
>>> timeit.Timer("for key in d: pass", "from __main__ import d").repeat()
[71.805022954940796, 71.10006308555603, 70.985043048858643]
>>> timeit.Timer("for key in d.keys(): pass", 
... "from __main__ import d").repeat()
[80.323757886886597, 76.463414907455444, 76.681307792663574]

A six second difference on a million iterations of the loop is probably 
not worth losing sleep over. But if your dict is very big, things may be 
different:

>>> d = dict(zip(xrange(1000000), xrange(1000000)))
>>> timeit.Timer("for key in d: pass", 
... "from __main__ import d").repeat(number=100) # I don't have all day...
[9.2374939918518066, 8.3636147975921631, 8.3667001724243164]
>>> timeit.Timer("for key in d.keys(): pass", 
... "from __main__ import d").repeat(number=100)
[13.776750087738037, 12.756224155426025, 12.697851181030273]

A four second difference on a hundred iterations of the loop _is_ 
something worth worrying about. Fortunately, Python makes it no worry at 
all: just iterate on the dict regardless of whether your dict is small or 
large, and you won't go wrong.


-- 
Steven.


From ldo at geek-central.gen.new_zealand  Fri Aug 31 23:38:46 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 15:38:46 +1200
Subject: Automation and scheduling of FrontPage publishing using Python
References: <1188517723.279932.299400@x40g2000prg.googlegroups.com>
Message-ID: <fbamnh$r7q$7@lust.ihug.co.nz>

In message <1188517723.279932.299400 at x40g2000prg.googlegroups.com>,
andrew.arobert at gmail.com wrote:

> We have numerous web sites which are currently being manually
> published via Front Page.
> 
> Doing one or two sites on an ad-hoc basis was not too bad but we are
> now over 20 or thirty at set times during a business day.

Let me open the bidding by suggesting that you stop using FrontPage.


From ptmcg at austin.rr.com  Sat Aug 25 21:48:33 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sat, 25 Aug 2007 18:48:33 -0700
Subject: Joining Big Files
In-Reply-To: <1188090939.364787.296630@r34g2000hsd.googlegroups.com>
References: <1188035844.616831.205350@i38g2000prf.googlegroups.com>
	<1188090939.364787.296630@r34g2000hsd.googlegroups.com>
Message-ID: <1188092913.645157.15370@o80g2000hse.googlegroups.com>

On Aug 25, 8:15 pm, Paul McGuire <pt... at austin.rr.com> wrote:
> On Aug 25, 4:57 am, mosscliffe <mcl.off... at googlemail.com> wrote:
>
> > I have 4 text files each approx 50mb.
>
> <yawn> 50mb? Really?  Did you actually try this and find out it was a
> problem?
>
> Try this:
> import time
>
> start = time.clock()
> outname = "temp.dat"
> outfile = file(outname,"w")
> for inname in ['file1.dat', 'file2.dat', 'file3.dat', 'file4.dat']:
>     infile = file(inname)
>     outfile.write( infile.read() )
>     infile.close()
> outfile.close()
> end = time.clock()
>
> print end-start,"seconds"
>
> For 4 30Mb files, this takes just over 1.3 seconds on my system.  (You
> may need to open files in binary mode, depending on the contents, but
> I was in a hurry.)
>
> -- Paul

My bad, my test file was not a text file, but a binary file.
Retesting with a 50Mb text file took 24.6 seconds on my machine.

Still in your working range?  If not, then you will need to pursue
more exotic approaches.  But 25 seconds on an infrequent basis does
not sound too bad, especially since I don't think you will really get
any substantial boost from them (to benchmark this, I timed a raw
"copy" command at the OS level of the resulting 200Mb file, and this
took about 20 seconds).

Keep it simple.

-- Paul



From wildemar at freakmail.de  Wed Aug 22 17:44:50 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Wed, 22 Aug 2007 23:44:50 +0200
Subject: Import question
In-Reply-To: <eb79828c0708221351v5aab6849pc38fce55f4f7eea@mail.gmail.com>
References: <eb79828c0708221351v5aab6849pc38fce55f4f7eea@mail.gmail.com>
Message-ID: <46CCAE52.3000800@freakmail.de>

Lamonte Harris wrote:
> can I import more then one modules like this:
>
> import module,module2
So your'e basically saying that you haven't tried it?

/W


From Roland.Puntaier at br-automation.com  Wed Aug 29 09:50:15 2007
From: Roland.Puntaier at br-automation.com (Roland Puntaier)
Date: Wed, 29 Aug 2007 15:50:15 +0200
Subject: strange list comprehension on generator
Message-ID: <OF8C63DC06.9B916754-ONC1257346.004B21AE-C1257346.004C0592@br-automation.com>

def changeOne(aa,idx):
  aa[idx]=not aa[idx]
  yield aa
  for i in range(idx):
    for x in changeOne(aa,i):
      yield x

def changeOneOrder(aa):
  yield aa
  for i in range(len(aa)): 
    for x in changeOne(aa,i):
      yield x

a=[False]*3
og=changeOneOrder(a)
#this does not return the way I would expect. why?
list(og)
#returns
#[[False, False, True], [False, False, True], [False, False, True], 
[False, False, True], [False, False, True], [False, False, True], [False, 
False, True], [False, False, True]]


#this works as expected
a=[False]*3
og=changeOneOrder(a)
og.next()
og.next()
...

#this works as expected
def ty():
  yield 1
  yield 2
  yield 3

tg=ty()
list(tg)

cheers, Roland



From ldo at geek-central.gen.new_zealand  Fri Aug 31 19:19:37 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 11:19:37 +1200
Subject: fcntl problems
References: <1188512377.441241.107900@q4g2000prc.googlegroups.com>
	<1188515889.352267.220790@q5g2000prf.googlegroups.com>
	<mailman.186.1188541398.28954.python-list@python.org>
	<1188568022.988154.188230@y42g2000hsy.googlegroups.com>
	<mailman.200.1188571375.28954.python-list@python.org>
Message-ID: <fba7hk$vkr$2@lust.ihug.co.nz>

In message <mailman.200.1188571375.28954.python-list at python.org>, Miles
wrote:

> except IOError, e:
>     if e.args[0] == 35:

Why not

    except IOError, (ErrNo, Msg) :
        if ErrNo == errno.EAGAIN :


From __peter__ at web.de  Sun Aug 12 06:00:14 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 12 Aug 2007 12:00:14 +0200
Subject: Fatest standard way to sum bytes (and their squares)?
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
Message-ID: <f9mlne$k0k$02$2@news.t-online.com>

Erik Max Francis wrote:

> For a file hashing system (finding similar files, rather than identical
> ones), I need to be able to efficiently and quickly sum the ordinals of
> the bytes of a file and their squares.  Because of the nature of the
> application, it's a requirement that I do it in Python, or only with
> standard library modules (if such facilities exist) that might assist.
> 
> So far the fastest way I've found is using the `sum` builtin and
> generators::
> 
> ordinalSum = sum(ord(x) for x in data)
> ordinalSumSquared = sum(ord(x)**2 for x in data)
> 
> This is about twice as fast as an explicit loop, but since it's going to
> be processing massive amounts of data, the faster the better.  Are there
> any tricks I'm not thinking of, or perhaps helper functions in other
> modules that I'm not thinking of?

Two ideas:

Use a lookup-table for ord(c)**2
Use array.array()

$ cat summit.py
import array

data = "dere gewizzede bizzede bizz" * 1000 + chr(255)

lookup  = dict((i, i**2) for i in range(256))

def summit_str(data=data):
    return sum(ord(x) for x in data), sum(ord(x)**2 for x in data)

def summit_array(data=data, lookup=lookup):
    a = array.array("B")
    a.fromstring(data)
    return sum(a), sum(lookup[x] for x in a)

if __name__ == "__main__":
    assert summit_array() == summit_str()

$ python -m timeit -s'from summit import summit_str as summit' 'summit()'
10 loops, best of 3: 32.2 msec per loop
$ python -m timeit -s'from summit import summit_array as summit' 'summit()'
100 loops, best of 3: 13.4 msec per loop

Your actual code may be even faster because you can read the bytes directly
from the file.

Peter


From mtobis at gmail.com  Mon Aug 20 01:52:53 2007
From: mtobis at gmail.com (Michael Tobis)
Date: Mon, 20 Aug 2007 05:52:53 -0000
Subject: yet another indentation proposal
In-Reply-To: <_49yi.9351$3x.6614@newssvr25.news.prodigy.net>
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
	<13ci0oesdtlh871@corp.supernews.com>
	<_49yi.9351$3x.6614@newssvr25.news.prodigy.net>
Message-ID: <1187589173.410862.132580@o80g2000hse.googlegroups.com>

On Aug 19, 11:51 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:

> What's wrong with just saying the current indent level? I'd much rather
> hear "indent 4" than "tab tab tab tab".

Alternatively, you might also consider writing a simple pre and
postprocessor so that you could read and write python the way you
would prefer

In that you could cope with the existing code base and the existing
compiler could cope with code you write.

mt



From ldo at geek-central.gen.new_zealand  Tue Aug 28 01:33:54 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Tue, 28 Aug 2007 17:33:54 +1200
Subject: include folder
References: <mailman.43.1188251054.28954.python-list@python.org>
Message-ID: <fb0bve$lhc$1@lust.ihug.co.nz>

In message <mailman.43.1188251054.28954.python-list at python.org>, Raul Araya
wrote:

> Today while trying to install a python based program I got an
> error regarding the Python.h file that should be in the /include/Phyton2.3
> folder. So I went looking for the file but it wasn't there, I mean the
> whole folder /Phyton2.3 inside the /usr/include directory was not there.

Perhaps that should be "/usr/include/python2.3"?

If you try the command

    dpkg -L python-dev

it should list all the files and directories that were installed as part of
the python-dev package, including the bits that go in /usr/include.


From jim724 at gmail.com  Wed Aug 22 15:18:44 2007
From: jim724 at gmail.com (Jimmy)
Date: Wed, 22 Aug 2007 19:18:44 -0000
Subject: NOW WATCH Satellite TV on your PC without Paying Monthly FEES
Message-ID: <1187810324.107527.267460@z24g2000prh.googlegroups.com>

Fed Up With Paying a Monthly Fee For A Handful of Channels That Don't
Satisfy Your Needs?

Most people pay $19 to $90 a month for a very limited number of TV
channels. If you fall into this category and want out, you can get
solution at the link below....

http://satellitetvonpc.yoll.net/



From pict100 at gmail.com  Sun Aug 26 09:16:45 2007
From: pict100 at gmail.com (DarkBlue)
Date: Sun, 26 Aug 2007 06:16:45 -0700
Subject: Kinterbasdb needs new maintainer
Message-ID: <1188134205.788503.63960@l22g2000prc.googlegroups.com>

Sorry to interrupt the regular programming here .

As has been reported on some websites the
maintainer of kinterbasdb David Rushby has died
last month after a diving accident.

Kinterbasdb is the python wrapper around the Firebird
database api and an excellent opensource project.

The hope is , that this message will reach someone
in the opensource developer community , who is willing
to step up and continue the great work done by David .


Thank you

http://www.firebirdnews.org/?p=1252
http://kinterbasdb.sourceforge.net/



From steven.bethard at gmail.com  Thu Aug 16 17:55:30 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 16 Aug 2007 15:55:30 -0600
Subject: advice about `correct' use of decorator
In-Reply-To: <mailman.2074.1187294411.22759.python-list@python.org>
References: <mailman.2074.1187294411.22759.python-list@python.org>
Message-ID: <2vydnTio1a9IWlnbnZ2dnUVZ_jKdnZ2d@comcast.com>

Gerardo Herzig wrote:
> Hi all. I guess i have a conceptual question:
> Im planing using a quite simple decorator to be used as a conditional 
> for the execution of the function. I mean something like that:
> 
> @is_logued_in
> def change_pass():
>    bla
>    bla
> 
> And so on for all the other functions who needs that the user is still 
> loged in.
> 
> where obviosly the is_logued_in() function will determine if the dude is 
> still loged in, and THEN execute change_pass(). If the dude is not loged 
> in, change_pass() is NOT executed at all. Instead, it will be redirected 
> to the `login' screen.
> 
> Something in my mind tells me that this is not the pythonic way...But i 
> like the idea, so please tell me that im in the right way :)

Django does it almost exactly this way:

http://www.djangoproject.com/documentation/authentication/#the-login-required-decorator

STeVe


From twisted0n3 at gmail.com  Mon Aug 20 20:54:54 2007
From: twisted0n3 at gmail.com (Twisted)
Date: Tue, 21 Aug 2007 00:54:54 -0000
Subject: Latest models of Gibson guitars
In-Reply-To: <9K6dnY8HnIUNHlTbnZ2dnUVZ_gGdnZ2d@comcast.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<1187548916.909340.37420@k79g2000hse.googlegroups.com>
	<1187579396.285862.186860@e9g2000prf.googlegroups.com>
	<9K6dnY8HnIUNHlTbnZ2dnUVZ_gGdnZ2d@comcast.com>
Message-ID: <1187657694.106990.266830@z24g2000prh.googlegroups.com>

On Aug 20, 8:05 am, Lew <l... at lewscanon.com> wrote:
> Twisted wrote:
> > On Aug 19, 2:41 pm, vedrandeko... at v-programs.com wrote:
> >> This is  a newsgroup of programming language Python, stop with this!
>
> > Python?! Python is as off-topic here as guitars, unlike, say, Java...
>
> When referring to "this" newsgroup or "here", one must remember that this is a
> cross-posted thread

You assume it was obvious to me that it was in the first place. But I
didn't see it in any other group that I read, and the news interface
that I use just, by default, shows me the subject, from, and date and
the name of the one newsgroup that I'm reading. If the message then
says something absurd, like "this is a newsgroup about Python" when
I'm reading it in cljp, well, what do you expect? :P

Again you seem to assume I have more context than I actually do when I
read postings. At least when it's cross-posted if I for some reason
decided to look closely at all of the headers that it was cross-posted
would become quickly apparent. Previously, though, you even expected
me to know at a glance when a message was multi-posted separately to
various groups, though nothing in the headers would indicate this.
Only doing a Google search for every message's content would reliably
detect multi-posting, and I'm not about to start doing that just to
satisfy *you*. :P



From ivoras at __fer.hr__  Fri Aug 31 13:09:58 2007
From: ivoras at __fer.hr__ (Ivan Voras)
Date: Fri, 31 Aug 2007 19:09:58 +0200
Subject: Biased random?
In-Reply-To: <1188506180.227794.20030@q5g2000prf.googlegroups.com>
References: <favd0c$fcu$1@ss408.t-com.hr>
	<mailman.80.1188332647.28954.python-list@python.org>
	<fb77bq$jtk$1@ss408.t-com.hr>
	<1188506180.227794.20030@q5g2000prf.googlegroups.com>
Message-ID: <fb9i18$sgv$1@ss408.t-com.hr>

Mark Dickinson wrote:

> That's because the call to abs() usually collapses two values to one
> (e.g. -2 and 2 both end up being 2),
> but there's only one integer n for which abs(n) == 0.

Ah. Need to sleep more.

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From jstroud at mbi.ucla.edu  Thu Aug 16 23:37:57 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 16 Aug 2007 20:37:57 -0700
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187320510.165621.224150@l22g2000prc.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<fa2m4s$k1g$1@daisy.noc.ucla.edu>
	<1187311999.880853.135780@j4g2000prf.googlegroups.com>
	<mailman.2091.1187317979.22759.python-list@python.org>
	<1187320510.165621.224150@l22g2000prc.googlegroups.com>
Message-ID: <fa356l$urr$1@daisy.noc.ucla.edu>

beginner wrote:
> On Aug 16, 9:32 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> 
>>On Fri, 2007-08-17 at 00:53 +0000, beginner wrote:
>>
>>>$b is supposed to be a hash-table of hash-table. If a key exists in
>>>$b, it points to another hash table. The $a=$b->{"A"} ||={} pattern is
>>>useful when you want to add records to the double hash table.
>>
>>>For example, if you have a series of records in the format of (K1, K2,
>>>V), and you want to add them to the double hash-table, you can do
>>>$a=$b->{K1} || ={}
>>>$a->{K2}=V
>>
>>What is the best solution in Perl need not be the best solution in
>>Python. In Python you should just use a tuple as your dict key, i.e.
>>a[k1,k2] = v, unless you have some other constraints you're not telling
>>us.
>>
>>HTH,
>>
>>--
>>Carsten Haesehttp://informixdb.sourceforge.net
> 
> 
> I use tuples this way all the time. It is indeed very neat.  But it is
> not a replacement for double hash-table.  If I want to retrieve
> information just by K1, it is not efficient to index on (K1, K2).
> 

Define "efficient". As in typing? Lookup should be the same speed for 
all keys because its a hash-table.

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From wolf_tracks at invalid.com  Fri Aug 17 13:59:19 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Fri, 17 Aug 2007 17:59:19 GMT
Subject: Python and Tkinter Programming--Expensive!
Message-ID: <Xllxi.9066$3x.1781@newssvr25.news.prodigy.net>

Why is the book in Subject (author is Grayson) so expensive? $100 on Amazon 
and $195 on ABE. Aren't there alternatives?
-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From kguan at corp.netease.com  Thu Aug 16 22:32:26 2007
From: kguan at corp.netease.com (Kyo Guan)
Date: Fri, 17 Aug 2007 10:32:26 +0800
Subject: why psyco using more memery in liunx?
Message-ID: <005c01c7e076$da20e4a0$811ba8c0@kyom>

Hi all:

	When you import psyco in python2.5, you can see the memery grow up
near 40MB in linux. but the same version python and psyco, is only grow up 1MB
under windows. 

kyo




From larry.bates at websafe.com  Thu Aug 23 16:45:21 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 23 Aug 2007 15:45:21 -0500
Subject: How would I go about making a file open. Not the way you might
	think.
In-Reply-To: <mailman.159.1187857019.32294.python-list@python.org>
References: <eb79828c0708221959t18dd4024m251c1eac7732ec1f@mail.gmail.com>
	<mailman.159.1187857019.32294.python-list@python.org>
Message-ID: <ntSdnapifutBbFDbnZ2dnUVZ_tWtnZ2d@comcast.com>

Hendrik van Rooyen wrote:
> Lamonte Harris  wrote:
> 
>> Basically you can open a file by double clicking, and by default it would open
> w/ what every program you have it set >to.  Most text files would open in
> notepad.  How can I make a txt open so that notepad opens w/ the content in it
> by >using just python.
> 
> I asked this question just yesterday - and Tim Golden answered:
> 
> os.startfile()
> 
> - Hendrik
> 
Actually os.startfile('filename.txt') will open the file with whatever 
application is associated with .txt files on that machine.  That could be 
different from notepad if the user has chosen to override the defaults.

os.system('notepad.exe c:\\junk.txt')

will force notepad.exe to load and it will load the file specified.

All depends on what you want to do.

-Larry



From __peter__ at web.de  Wed Aug 22 06:04:28 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 22 Aug 2007 12:04:28 +0200
Subject: Dispatching default application for file, cross platform.
References: <01e101c7e48d$e0e9f860$03000080@hendrik>
	<mailman.106.1187774244.32294.python-list@python.org>
Message-ID: <fah1nc$cqq$02$1@news.t-online.com>

Tim Golden wrote:

> Hendrik van Rooyen wrote:
>> How do I do the equivalent of clicking (in SuSe) or double clicking (in
>> Windows) on a file?
>> 
>> In effect I want to tell the OS - take this file and feed it to the
>> application that is registered for it.

> os.startfile

Unfortunately this is Windows-only. 
For KDE you can use

$ kfmclient exec yourfile

Peter


From dale at riverhall.nospam.co.uk  Sun Aug  5 20:10:19 2007
From: dale at riverhall.nospam.co.uk (Dale Strickland-Clark)
Date: Mon, 06 Aug 2007 01:10:19 +0100
Subject: MIMEText breaking the rules?
References: <rFZri.84932$ml1.74260@fe16.usenetserver.com>
	<h7j5b3dv43hgu7qrvg3anprat4pq86jfsg@4ax.com>
Message-ID: <MFtti.88126$ml1.2189@fe16.usenetserver.com>

Tim Roberts wrote:

> Dale Strickland-Clark <dale at riverhall.nospam.co.uk> wrote:
>>
>>The email module's mimetext handling isn't what you might expect from
>>something that appears to behave like a dictionary.
>>...
>>Having apparently REPLACED my recipient, what I've ended up with is both
>>of them.
> 
> This behavior is documented in Message.Message, from which MIMEText
> eventually inherits.  If you want to start over, delete the item:
> 
>   del Msg["To"]
> 
> I would have to say that the existing behavior is more intuitive for an
> email object.

Thanks for the info.

-- 
Dale Strickland-Clark
Riverhall Systems - www.riverhall.co.uk 



From frikker at gmail.com  Thu Aug 16 13:58:53 2007
From: frikker at gmail.com (frikk)
Date: Thu, 16 Aug 2007 10:58:53 -0700
Subject: Accessing Windows Network Share?
Message-ID: <1187287133.737105.169960@19g2000hsx.googlegroups.com>

I previously posted about accessing SharePoint over the web. Well I
have since given up any easy means of doing this, since something else
has perked my interest.  Instead of going to http://sharepoint/site,
why not just access \\sharepoint\site\ directly?

So my question is this - How do I access that network share?

If I go to start -> run, and type in "\\SharPointServer\Site\Folder",
windows explorer will pop up with it.  I suppose I could have a little
batch script that python runs to map the drive to a local letter, like
J:, but this does not seem necessary.

Suggestions?

This does not work, for obvious reasons:
>>> import glob.glob
>>> glob.glob("\\\\server\\folder\\*")
[]


Thanks guys!
Blaine



From xavier.martinezhidalgo at gmail.com  Wed Aug 29 04:58:52 2007
From: xavier.martinezhidalgo at gmail.com (xavim)
Date: Wed, 29 Aug 2007 08:58:52 -0000
Subject: Error handling in file generation (Pythonic way: with / decorators?)
Message-ID: <1188377932.955314.104570@r29g2000hsg.googlegroups.com>

Hi everyone,

I am writing a small tool that generates a file from a list of
sources.
The function dictgen(dictfile, *sources) takes a list of sources path
and an open file object and does the processing.

I am having some problems with how to do proper error handling.
One of the requirements is that the destination file should not be
created if there is any error in the processing.

I have come out with the following code::

    dictfile = file(dictpath, 'w')
    try:
        try:
            dictgen(dictfile, *sources)
        finally:
            dictfile.close()
    except error, e:
        os.remove(dictpath)
        sys.exit(str(e))
    except:
        os.remove(dictpath)

but it appears to me as somewhat ugly.  Is there any more Pythonic
way to abstract this kind of error handling?  Maybe 'with' or
decorators could be useful here?

Thanks,
Xavi



From david at asdf.asdf  Sun Aug 26 21:54:37 2007
From: david at asdf.asdf (bambam)
Date: Mon, 27 Aug 2007 11:54:37 +1000
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com><1187898049.734696.9500@l22g2000prc.googlegroups.com><13csi2tn49esmc3@corp.supernews.com>
	<mailman.230.1187928865.32294.python-list@python.org>
	<13csqk47j0c56b0@corp.supernews.com>
	<CqSdnRl2x8928FPbnZ2dnUVZ_jSdnZ2d@speakeasy.net>
	<13ct7v3qn2v5206@corp.supernews.com>
	<13d00hu2mflt01b@corp.supernews.com>
Message-ID: <13d4bn9kchd9u94@corp.supernews.com>


c = sorted(set(a)-set(b))

although for me :~( that is another step more obscure than

c = list(set(a)-set(b))
c.sort()

Bags don't seem to be built in to my copy of Python, and
although I'm interested in why lists don't support the difference
operation, I don't want to get away from standard Python.

Steve.

"Scott David Daniels" <daniels at dsl-only.net> wrote in message 
news:13d00hu2mflt01b at corp.supernews.com...
> bambam wrote:
>>> The reason that lists don't have set-like methods is because
>>> lists aren't sets -- lists can contain duplicate elements
> and they are ordered.  I'd have used sets if I was sure you
> meant [1,2,3] to mean the same thing as [3,1,2] and no duplicates.
>
>> Interesting point -- if that's all there is in it, then lists should
>> have difference and intersection methods. Not because they
>> are the same as sets -- because they are slightly different than
>> sets. In this case it doesn't matter - my lists don't contain
>> duplicate elements this time - but I have worked with lists in
>> money market and in inventory, and finding the intersection
>> and difference for matching off and netting out are standard
>> operations.
> Here you seem to be talking about multisets (also called bags).
> They have more fully defined algebraic properties analogous to sets.
>
> bag([1,2,3,3,4]) == bag([3,1,2,4,3]) != bag([1,2,3,4])
> bag([1,2,2,3]) - bag([1,2]) == bag([2,3])
> bag([1,2,3]) - bag([3,4]) == bag([1])
>
>>>> Excellent. By symmetry, I see that "list" casts the set back into a 
>>>> list.
> Some will say 'sorted' is a better conversion of a set to list, since
> the result is well-defined.
>
> --Scott David Daniels
> Scott.Daniels at Acm.Org 




From horpner at yahoo.com  Tue Aug 14 14:27:16 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 14 Aug 2007 18:27:16 GMT
Subject: curses library
References: <mailman.1980.1187115104.22759.python-list@python.org>
Message-ID: <slrnfc3t7e.1p0.horpner@FIAD06.norwich.edu>

On 2007-08-14, Ghirai <ghirai at ghirai.com> wrote:
> I need to write a console application.
>
> Are there any wrappers around curses/ncurses?
> Or any other similar libraries?

The answer depends on your chosen platform. Python hasn't got a
cross-platform console library as one of its included batteries.

First try the curses module. It does come with Python on systems
with a curses port.

For Windows, there's the Effbot's console module.
http://effbot.org/zone/console-index.htm

Or go to plan B: Use a Tkinter or other GUI interface's text
widget.

-- 
Neil Cerutti


From http  Thu Aug  2 16:27:57 2007
From: http (Paul Rubin)
Date: 02 Aug 2007 13:27:57 -0700
Subject: __call__ considered harmful or indispensable?
References: <mailman.1527.1186079415.22759.python-list@python.org>
Message-ID: <7xfy31smuq.fsf@ruckus.brouhaha.com>

skip at pobox.com writes:
> In this particular case it was clearly unnecessary and just obfuscated the
> code.  I'm wondering, are there some general cases where __call__ methods of
> a user-defined class are simply indispensable?

I don't know about "indispensable" but __call__ is convenient sometimes
and I do use it.  I've wished that modules supported call, so I could
say

    import foo
    x = foo(3)

instead of having to say x=foo.foo(3) or something like that.


From ronpro at cox.net  Tue Aug 28 16:11:11 2007
From: ronpro at cox.net (Ron Provost)
Date: Tue, 28 Aug 2007 16:11:11 -0400
Subject: Tix HList missing at least one method
Message-ID: <003901c7e9af$94e25d00$6501a8c0@aristotle>

According to the Tix documentation online, HList has an info_bbox() method which returns the bounding box of a given item in the HList.  However, when I try to call this method, I get an attribute error.  Looking at Tix.py I see that info_bbox() is not implemented.

Hazarding a chance (mostly by looking at the other method implementation) I see if I can define it myself.

def info_bbox( self, entry ):
   return [ int(pos) for pos in self.tk.call( self._w, 'info', 'bbox', entry).split() ]

When I use this implementation it works.  Why's info_bbox() been left out of HList?

I can't formulate a work-around for what I'm trying to do.  I need info_bbox().

Here's why:

I'm currently working on a project which involves some fairly complex GUIs.  It displays data in the form of an outline which the user can edit, it also generates web pages.  To allow a natural feel to editing the order of the items in the outline, I decided to make use of the Tkinter drag and drop module: Tkdnd.  To do this correctly, I need to do a bit of arithmetic with screen coordinates while in a drag operation  (so I can change the cursor during the drag) so that I can determine if my current drag position (potential drop position) is above, below or as a child of some other item in the outline.  The easiest way to do this is to get the bounding box of the nearest items.


Thanks,
Ron
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From gmcalendar at gmail.com  Thu Aug 23 11:31:44 2007
From: gmcalendar at gmail.com (gmcalendar at gmail.com)
Date: Thu, 23 Aug 2007 15:31:44 -0000
Subject: simple spider in python
In-Reply-To: <1187880988.813113.20350@l22g2000prc.googlegroups.com>
References: <1187876014.845912.236690@e9g2000prf.googlegroups.com>
	<1187879398.007797.128510@i13g2000prf.googlegroups.com>
	<1187880988.813113.20350@l22g2000prc.googlegroups.com>
Message-ID: <1187883104.337285.270910@q4g2000prc.googlegroups.com>

Well, it turned out that google since Dec 2006 is not giving out SOAP
api keys anymore.
What a shame! any tip? ;-)



From countblabula at yahoo.com  Mon Aug  6 14:24:53 2007
From: countblabula at yahoo.com (Lee Fleming)
Date: Mon, 06 Aug 2007 11:24:53 -0700
Subject: Something in the function tutorial confused me.
In-Reply-To: <slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
Message-ID: <1186424693.529497.217040@w3g2000hsg.googlegroups.com>

Thanks for all the help, everyone. I guess I was confused with default
arguments that were mutable and immutable. I will continue to look
over these posts until I understand what is happening.

I cannot believe the number of helpful responses I got!



From programmer.py at gmail.com  Fri Aug 17 08:55:45 2007
From: programmer.py at gmail.com (programmer.py at gmail.com)
Date: Fri, 17 Aug 2007 12:55:45 -0000
Subject: Naming dictionaries recursively
In-Reply-To: <1187354296.177606.273300@22g2000hsm.googlegroups.com>
References: <1187354296.177606.273300@22g2000hsm.googlegroups.com>
Message-ID: <1187355345.874107.64160@r34g2000hsd.googlegroups.com>

On Aug 17, 7:38 am, TYR <a.harrow... at gmail.com> wrote:
> I'd like to do something like this; iterate through a file which
> consists of data stored in dictionary format, one dict on each line,
> and read each line into a new dict using one of the values in the dict
> as its name...
>
> for example:
>
> stuff = open('data.txt')
>  for eachLine in stuff:
>   name{}
>    name = eachLine
> ....and then do something clever to extract the value of the key
> (name) from the line and use it as the dictionary's name.
>
> A line from data.txt would look like this: {'name' : Bob, 'species' :
> Humboldt, 'colour' : red, 'habits' : predatory}. Aim is to call one of
> them by name, and merge the values in that dictionary into a string
> pulled from another source.

I'm not sure I follow exactly what you want to do, but you can always
use eval for each line in that file.

But, if the line you provided for testing is one that actually comes
from the file, you'll have to patch it before you eval the line.  I
think this regexp will work.  Be careful though, it assumes that all
values are whole words, that is they don't have spaces in them.

# This is far from ideal, but you get what you pay for :).
re.sub(r':\s*(\w+)(,|})', r"': '\1'\2", line)

Anyway, after you've cleaned up your input line this ought to work:
d = eval(line)

Also, if you're building the input file from within a python program,
maybe you should consider the pickle module.

That ought to give you a good start...

jw



From nytrokiss at gmail.com  Mon Aug 20 10:58:27 2007
From: nytrokiss at gmail.com (James Matthews)
Date: Mon, 20 Aug 2007 07:58:27 -0700
Subject: Problem with Thread.join()
In-Reply-To: <op.txcl3yoox6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <496954360708131610i62c0a63aneb7c39d23a052ac0@mail.gmail.com>
	<op.txcl3yoox6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <8a6b8e350708200758w640fd7c4w5bd19fb53decde71@mail.gmail.com>

Post some code so we can see the issue! I would say that the issue is where
your function that you are calling isn't exiting!

On 8/20/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> En Mon, 13 Aug 2007 20:10:53 -0300, Robert Dailey <rcdailey at gmail.com>
> escribi?:
>
> > I have a class that derives from threading.Thread. To signal the thread
> > to
> > exit its infinite loop, I set an Event. Once the thread checks
> > Event.isSet()
> > and it is true, it proceeds to break out of the loop and exit the
> > function.
> > In the main thread, right after calling Event.set(), I call
> > Thread.join() to
> > wait on the thread to exit. However, if I call Thread.join() the
> > application
> > locks up because for some reason calling Thread.join() prevents the
> > thread
> > from exiting. I don't know why. Any help? Thanks...
>
> Conceptually you're doing it the right way. Post some code demonstrating
> the problem...
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list




-- 
http://www.goldwatches.com/
http://www.jewelerslounge.com
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From grflanagan at yahoo.co.uk  Wed Aug  1 17:28:39 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: Wed, 01 Aug 2007 14:28:39 -0700
Subject: Awkward format string
In-Reply-To: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
References: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
Message-ID: <1186003719.783219.104200@r34g2000hsd.googlegroups.com>

On Aug 1, 6:11 pm, beginner <zyzhu2... at gmail.com> wrote:
> Hi,
>
> In order to print out the contents of a list, sometimes I have to use
> very awkward constructions. For example, I have to convert the
> datetime.datetime type to string first, construct a new list, and then
> send it to print. The following is an example.
>
>         x=(e[0].strftime("%Y-%m-%d"), e[1].strftime("%Y-%m-%d"))+e[2:]
>         print  >>f, "%s\t%s\t%d\t%f\t%f\t%f\t%d" % x
>
> e is a tuple. x is my new tuple.
>
> Does anyone know better ways of handling this?
>

YEARMONTHDAY = "%Y-%m-%d"

def strftime(dt):
    return dt.strftime(YEARMONTHDAY)

def tostring(data):
    return tuple(strftime(x) for x in data[:2]) + data[2:]






From jstroud at mbi.ucla.edu  Wed Aug 22 18:54:54 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 22 Aug 2007 15:54:54 -0700
Subject: introspection and functions
In-Reply-To: <1187819949.515982.15450@r23g2000prd.googlegroups.com>
References: <1187819949.515982.15450@r23g2000prd.googlegroups.com>
Message-ID: <B33zi.4126$Oo.317@newssvr17.news.prodigy.net>

yagyala wrote:
> Hi. I would like to be able to tell, at run time, how many parameters
> a function requires. Ideally I would like to be able to tell which are
> optional as well. I've tried looking at the functions attributes, but
> haven't found one that helps in this. How can I do this?
> 
> Thanks
> 

py> def doit(a, b, c, x=14):
...   pass
...
py> doit.func_code.co_argcount
4
py> doit.func_code.co_varnames
('a', 'b', 'c', 'x')
py> doit.func_defaults
(14,)

James


From m.elston at advantest-ard.com  Mon Aug 27 14:35:17 2007
From: m.elston at advantest-ard.com (Mark Elston)
Date: Mon, 27 Aug 2007 11:35:17 -0700
Subject: convert non-delimited to delimited
In-Reply-To: <1188237563.889663.228970@o80g2000hse.googlegroups.com>
References: <1188237563.889663.228970@o80g2000hse.googlegroups.com>
Message-ID: <13d66b6b0fnke49@corp.supernews.com>

* RyanL wrote (on 8/27/2007 10:59 AM):
> I'm a newbie!  I have a non-delimited data file that I'd like to
> convert to delimited.
> 
> Example...
> Line in non-delimited file:
> 0139725635999992000010100534+42050-102800FM-15+1198KAIA
> 
> Should be:
> 0139,725635,99999,2000,01,01,00,53,4,+42050,-102800,FM-15,+1198,KAIA
> 
> What is the best way to go about this?  I've looked all over for
> examples, help, suggestions, but have not found much.  CSV module
> doesn't seem to do exactly what I want.  Maybe I'm just missing
> something or not using the correct terminology in my searches.  Any
> assistance is greatly appreaciated!  Using Python 2.4
> 

Since you have to know, a priori, how to break the input string I
assume that these fields are of fixed length.  You can use the following
to do what you want:

 >>> a="0139725635999992000010100534+42050-102800FM-15+1198KAIA"
 >>> print "%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s" %
     (a[0:4],a[4:10],a[10:15],a[15:19],a[19:21],a[21:23],a[23:25],
      a[25:27],a[27],a[28:34],a[34:41],a[41:46],a[46:51],a[51:])

which results in the following output:

0139,725635,99999,2000,01,01,00,53,4,+42050,-102800,FM-15,+1198,KAIA

Mark


From carsten at uniqsys.com  Fri Aug  3 21:19:31 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 03 Aug 2007 21:19:31 -0400
Subject: How to pass a reference to the current module
In-Reply-To: <f90im3$8ms$1@daisy.noc.ucla.edu>
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<f90im3$8ms$1@daisy.noc.ucla.edu>
Message-ID: <1186190371.3263.17.camel@localhost.localdomain>

On Fri, 2007-08-03 at 17:53 -0700, James Stroud wrote:
> James Stroud wrote:
> > Basically, what I am trying to acomplish is to be able to do this in any 
> > arbitrary module or __main__:
> > 
> > 
> > funcname = determined_externally()
> > ModuleUser.do_something_with(AModule, funcname)
> > 
> > 
> > Ideally, it would be nice to leave out AModule if the functions were 
> > designed in the same namespace in which do_something_with is called.
> 
> 
> Is this the preferred way?
> 
> 
> import sys
> def do_something_with(funcname, amodule=None):
>    if amodule is None:
>      function = sys._getframe(1).f_locals[funcname]
>    else:
>      function = getattr(amodule, funcname)
>    [etc.]

This seems to confirm my suspicion that the do_something_with function
doesn't actually need a reference to the module, it only needs a
reference to the function to call.

Maybe your hurdle is how to obtain a reference to a function from the
current module when all you have is the name of the function in a
string. The answer to that would be "globals()[funcname]".

-- 
Carsten Haese
http://informixdb.sourceforge.net




From gandalf at shopzeus.com  Fri Aug 17 15:34:35 2007
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Fri, 17 Aug 2007 21:34:35 +0200
Subject: Encryption and hashing
In-Reply-To: <1187377630.017794.36510@50g2000hsm.googlegroups.com>
References: <1187377630.017794.36510@50g2000hsm.googlegroups.com>
Message-ID: <46C5F84B.20109@shopzeus.com>


> For who knows any of criptography I comment that you can use
> algorithms as secure as Rijndael, Twofish, or Serpent with the CFB
> cipher mode. And for hash you can use RIPEMD, SHA-2 or WHIRLPOOL.
>   
As I recall, PyCrypto can also use these, and many others. And it can 
also do RSA.
> And the best is that there are wrappers for Python [5] [6].
>   
One advantage of PyCrypto is that it works on many platforms. If 
standard C extensions are not available, it will fall back to a pure 
python implementation. Well yes, sometimes it is slow. But it is also 
much easier to use than pyOpenSSL, for example. (BTW you forgot to 
mention some other popular ones, like pyOpenSSL, mcrypto2 etc.)

   Laszlo


From mccredie at gmail.com  Thu Aug 16 12:45:46 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Thu, 16 Aug 2007 09:45:46 -0700
Subject: threads, mutual exclusion, and lists
In-Reply-To: <46C3F78B.9080305@v.loewis.de>
References: <1187206583.255588.57920@e9g2000prf.googlegroups.com>
	<mailman.2039.1187219345.22759.python-list@python.org>
	<46C3F78B.9080305@v.loewis.de>
Message-ID: <9e95df10708160945h2bcaf978s50a4b390af7e4f5f@mail.gmail.com>

> Why do you think they are not?

Because they aren't. You even mentioned that a few operations that
aren't atomic. If operations are atomic it isn't necessarily because
of the design of the list, but the design of CPython. More
specifically the GIL. I don't mean to imply that you can't get a
multi-threaded app to communicate using lists, but the Queue is
explicitly built for it and better suited.

Matt


From naga86 at gmail.com  Mon Aug 20 08:58:52 2007
From: naga86 at gmail.com (Nagarajan)
Date: Mon, 20 Aug 2007 12:58:52 -0000
Subject: Server-side scripting in python
Message-ID: <1187614732.519547.296020@j4g2000prf.googlegroups.com>

Hi group,
I need to develop a web application. I am in a fix as to choose among
the various server-side scripting options. I want to explore python
(am a newbie) to gain expertise and upon search, I learnt about
PSP(Python Server Pages) that uses Jython as its scripting language.
Is it a better option over PHP or Perl? Could anyone point out the
pros and cons of using PSP over others?

Help much appreciated.



From bgoldenberg at gmail.com  Thu Aug  9 15:16:24 2007
From: bgoldenberg at gmail.com (Benjamin Goldenberg)
Date: Thu, 09 Aug 2007 19:16:24 -0000
Subject: Querying Graphics Card Name
Message-ID: <1186686984.160312.175270@i13g2000prf.googlegroups.com>

Hello,
I would like to find out the name of the graphics card of the machine
my program is running on. I have looked into the pyopengl module, and
using them to query the card, but it seems like there ought to be a
simpler way to find this out without setting up a glcontext. Does
anyone have any ideas?

Thanks,
Benjamin



From david at nospam.spam  Thu Aug  9 01:25:27 2007
From: david at nospam.spam (david)
Date: Thu, 09 Aug 2007 15:25:27 +1000
Subject: wxPython before MainLoop
Message-ID: <13bl9a75laqcm70@corp.supernews.com>

I'd like to refresh the display before I start the main loop.

I have code like this:

app = App()
app.Show()
app.long_slow_init()
app.MainLoop()


The main frame partly loads at Show, but because the mainloop has not 
started yet, the display does not update until long_slow_init() finishes.

Alternatively, I could code

app = App()
app.long_slow_init()
app.Show()
app.MainLoop()

Which would give me a crisp Show, but there would be a long slow wait 
before the app showed any activity at all. I would need a splash screen.

I'd rather not have a splash screen (and I don't know how anyway). I'd 
like to just make app.Show() finish correctly before running 
long_slow_init.

Is there a wx internal method that I can use to give Windows the 
opportunity to finish painting the frame before I run long_slow_init()?

Or is there a better idea?

(david)


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Aug 21 07:51:13 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 21 Aug 2007 13:51:13 +0200
Subject: The folder a script is executed in
References: <1187687436.476773.276550@22g2000hsm.googlegroups.com>
	<1187688437.358293.322460@22g2000hsm.googlegroups.com>
	<5ivqm3F3rg15jU1@mid.individual.net>
	<1187691170.820193.99270@r34g2000hsd.googlegroups.com>
Message-ID: <5j01thF3sap0kU1@mid.individual.net>

Ant wrote:

> Fair point. On Win32 sys.argv[0] always seems to give the full
> path rather than the relative path 

Strange.

> - hadn't realised it was different for linux (?).

Yes, I used GNU/Linux for the example.

Regards,


Bj?rn

-- 
BOFH excuse #148:

Insert coin for new game



From michele.simionato at gmail.com  Tue Aug 14 00:58:41 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Tue, 14 Aug 2007 04:58:41 -0000
Subject: decorators - more than just syntactic sugar
In-Reply-To: <yfszm0v49as.fsf@gmail.com>
References: <46be005e$0$13866$ba620e4c@news.skynet.be>
	<1186985383.303334.110230@19g2000hsx.googlegroups.com>
	<yfszm0v49as.fsf@gmail.com>
Message-ID: <1187067521.661978.254100@22g2000hsm.googlegroups.com>

On Aug 13, 7:46 pm, Alexander Schmolck <a.schmo... at gmail.com> wrote:
> Michele Simionato <michele.simion... at gmail.com> writes:
> > Well, I argued may times that syntactic sugar is important (all Turing
> > complete languages differs by syntactic sugar only)
>
> Although I agree that "mere" syntactic sugar matters, I think you're
> overstating the point. I would argue that most people would understand
> syntactic sugar as equivalent to a (very) localized program transformation.
> Things like first class continuations clearly aren't syntactic sugar in that
> sense.
>
> 'as

I don't think I am overstating my point. I am just pointing out
a sloppiness in the definition of "syntactic sugar". You are right
that most people understand it as ?a somewhat trivial
program transformation". However most people tend to forget that
by a succession of somewhat trivial program transformations you
can get quite a lot. Look, a compiled language is just a whole big lot
of syntactic sugar over assembly language!
An even continuations can be implemented in terms of macros. the
quintessence of syntactic
sugar (as you know better than me). You are right that this
require a global program transformation, it is a kind of heavy
duty syntactic sugar, but still it is always syntactic sugar
at the end. Then, you may decide that you want to use a different
name from global program transformation, since syntactic sugar
sounds diminutive, but then it is an issue of names ;)

        Michele Simionato



From mroeloffs at gmail.com  Mon Aug 20 10:17:03 2007
From: mroeloffs at gmail.com (mroeloffs at gmail.com)
Date: Mon, 20 Aug 2007 07:17:03 -0700
Subject: datetime in microseconds
In-Reply-To: <1187615746.655162.295570@z24g2000prh.googlegroups.com>
References: <1187610776.755796.170990@r29g2000hsg.googlegroups.com>
	<1187615746.655162.295570@z24g2000prh.googlegroups.com>
Message-ID: <1187619423.715120.293660@o80g2000hse.googlegroups.com>

On Aug 20, 3:15 pm, John Machin <sjmac... at lexicon.net> wrote:
> On Aug 20, 9:52 pm, mroelo... at gmail.com wrote:
>
> > Hi I have a time in microseconds, for example 0x8C905CBA7F84AF4. I
> > want this to a normal view in hh:mm:ss DD:MM:YYYY. I tried with
> > datetime, but it only takes a max of 1000000 microseconds is there
> > another solution?
>
> Your question can be interpreted in two possible ways:
>
> 1. You have an interval or duration (independent of a calendar point)
> and you want to express it in years, months, days, hours, etc. This is
> not possible, due to the variable number of days in a month. The best
> that you can do is express it as days, hours, etc.
>
> >>> microsecs = 0x8C905CBA7F84AF4
> >>> secs = microsecs // 1000000 # or round to nearest if you prefer
> >>> mins, secs = divmod(secs, 60)
> >>> hrs, mins = divmod(mins, 60)
> >>> days, hrs = divmod(hrs, 24)
> >>> days, hrs, mins, secs
>
> (7326893L, 11L, 1L, 16L)
>
>
>
> 2. You want to know the (Gregorian) calendar point that is
> 0x8C905CBA7F84AF4 microseconds after some epoch. In this case you need
> to specify what the epoch is. Then you can try something like:
>
> >>> datetime.datetime.fromordinal(1) + datetime.timedelta(microseconds=microsecs
>
> )
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> OverflowError: date value out of range
>
> >>> # Whoops!
> >>> years_approx = days / 365.25
> >>> years_approx
> 20059.939767282682
>
> Hmmm, one of us seems to be missing something ...

Sorry,  sorry, sorry it was the wrong value, it should be
0xE0E6FAC3FF3AB2.



From evan at yelp.com  Thu Aug  2 01:53:55 2007
From: evan at yelp.com (Evan Klitzke)
Date: Wed, 1 Aug 2007 22:53:55 -0700
Subject: calling superclass __init__ when superclass is object
In-Reply-To: <cfb58d850708012215u24b8ce8aie7a02f99cd0d1137@mail.gmail.com>
References: <cfb58d850708012215u24b8ce8aie7a02f99cd0d1137@mail.gmail.com>
Message-ID: <cfb58d850708012253t4319ddadof16bd02dedf83a00@mail.gmail.com>

On 8/1/07, Evan Klitzke <evan at yelp.com> wrote:
> Hi list,
>
> I was reading this article: http://fuhm.net/super-harmful/ and didn't
> understand the comment about calling super(Foo, self).__init__() when
> Foo inherits only from object. Can someone on the list elaborate more
> on why one should do this?

I hate to reply to my own thread, but I read this article:
http://www.python.org/download/releases/2.3/mro/ and I think I
understand the rationale now. If you have:

class Foo(object):
    # stuff here
class Bar(object):
    # stuff here
class Baz(Foo, Bar):
    # stuff here

Then if Baz calls super(Baz, self).__init__() in its __init__, and Foo
makes no call super(Foo, self).__init__(), then the constructor for
Bar will never be called.

-- 
Evan Klitzke <evan at yelp.com>


From kyosohma at gmail.com  Mon Aug  6 10:25:31 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 06 Aug 2007 07:25:31 -0700
Subject: Tkinter or wxpython?
In-Reply-To: <mailman.1550.1186099225.22759.python-list@python.org>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
Message-ID: <1186410331.905174.21370@q3g2000prf.googlegroups.com>

On Aug 2, 7:00 pm, "wang frank" <f... at hotmail.co.jp> wrote:
> Hi,
>
> I want to build a GUI to execut python script. I found TKinter and
> wxpython. Which one is easier for a newbie? and which one is better?
>
> Thanks
>
> Frank
>
> _________________________________________________________________
>                                       
>  http://clk.atdmt.com/GBL/go/msnjpqjl0060000010gbl/direct/01/

 I've read that Tkinter doesn't scale well if you're writing complex
GUIs. I haven't been able to test this hypothesis though. However,
since I had to rewrite VBA apps into Python, to get the right "look
and feel" I needed the widgets that wxPython provided. Since I started
out with C++, I find wxPython better than Tkinter, but it's all pretty
subjective. Try them both!

Mike



From erfc at caballista.org  Wed Aug  1 22:33:37 2007
From: erfc at caballista.org (Art Deco)
Date: Wed, 01 Aug 2007 20:33:37 -0600
Subject: What does this thread have to do with classical music,
References: <7nnh7350b5h25ghocra72b23mmsnnkj8bh@4ax.com>
	<468e482b$0$97236$892e7fe2@authen.yellow.readfreenews.net>
	<4692df4a$0$4804$8f2e0ebb@news.shared-secrets.com>
	<469392cd$0$97226$892e7fe2@authen.yellow.readfreenews.net>
	<469445b3$0$4819$8f2e0ebb@news.shared-secrets.com>
	<4694e124$0$97214$892e7fe2@authen.yellow.readfreenews.net>
	<46957ef1$0$10227$8f2e0ebb@news.shared-secrets.com>
	<46963170$0$97261$892e7fe2@authen.yellow.readfreenews.net>
	<46981df7$0$12095$8f2e0ebb@news.shared-secrets.com>
	<46990784$0$97223$892e7fe2@authen.yellow.readfreenews.net>
	<4699297c$0$4706$4c368faf@roadrunner.com>
	<140720071431044860%erfc@caballista.org>
	<46a3a1a7$0$15115$8f2e0ebb@news.shared-secrets.com>
	<220720072148091069%erfc@caballista.org>
	<46a5385d$0$4832$8f2e0ebb@news.shared-secrets.com>
	<250720071834457296%erfc@caballista.org>
	<46aceaa5$0$13281$8f2e0ebb@news.shared-secrets.com>
	<290720071853200863%erfc@caballista.org>
	<46b12539$0$4807$8f2e0ebb@news.shared-secrets.com>
Message-ID: <010820072033374341%erfc@caballista.org>

ah <splifingate at gmail.com> wrote:
>Art Deco wrote:
>> ah <splifingate at gmail.com> wrote:
>>>Art Deco wrote:
>>>> ah <splifingate at gmail.com> wrote:
>>>>>Art Deco wrote:
>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>Art Deco wrote:
>>>>>>>> Who wrote?
>>>>>>>> 
>>>>>>>> 
>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>> 
>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>> 
>>>>>>>> How many more times will you be asking the same tired, lame questions,
>>>>>>>> Tholen?
>>>>>>>
>>>>>>>Till 2056?
>>>>>> 
>>>>>> At that point, he will have made the Thirty Years Pset War look like
>>>>>> 1967 in the Sinai.
>>>>>
>>>>>It must have been Hell to keep a garden during those times.
>>>>>
>>>>>Did they all eat jerky, or what?
>>>> 
>>>> Worse -- worm-laden hardtack.
>>>
>>>Luxury!
>>>
>>>Why, I remember when I was a lad . . . we used to watch the local churls
>>>across the fences eating that well.
>>>
>>>We only had millings (and (occasionally) water) on Tuesdays and Fridays.
>> 
>> Grog and hardtack, life is good!
>
>?Viva la basura!

Vivat les ordures!

-- 
Official Overseer of Kooks and Saucerheads for alt.astronomy
Trainer and leash holder of:
  Honest "Clockbrain" John
  nightbat "fro0tbat" of alt.astronomy
  Tom "TommY Crackpotter" Potter
  <http://www.caballista.org/auk/kookle.php?search=deco>

"You really are one of the litsiest people I know, Mr. Deco."
  --Kali, quoted endlessly by David Tholen as evidence of "something"


From naga86 at gmail.com  Thu Aug 23 05:21:40 2007
From: naga86 at gmail.com (Nagarajan)
Date: Thu, 23 Aug 2007 09:21:40 -0000
Subject: Raw strings to normal strings conversion?
In-Reply-To: <Xrbzi.21051$eY.3412@newssvr13.news.prodigy.net>
References: <1187851660.209024.59860@l22g2000prc.googlegroups.com>
	<Xrbzi.21051$eY.3412@newssvr13.news.prodigy.net>
Message-ID: <1187860900.740674.87180@e9g2000prf.googlegroups.com>

On Aug 23, 1:21 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Nagarajan wrote:
> > Is there a way by which I could obtain normal string form of a raw
> > string.
> > XML CDATA is returned as raw string. But I need the string to actually
> > escape special chars.
>
> > Any idea?
>
> This doesn't seem clear. Perhaps an example of what you get and what you
> want it converted to.

Here is an example:
>> rawstr = r'a\nb'
>> print rawstr
a\nb

Now I need this newstr to actually interpret '\n', in other words, to
behave like a normal string.
>
> In the meantime, see if urllib.unquote() doesn't do what you need.
>
> James

And yes, unquote doesn't help.



From mccredie at gmail.com  Fri Aug 24 19:01:59 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Fri, 24 Aug 2007 16:01:59 -0700
Subject: Problem w/ Tkinter
In-Reply-To: <eb79828c0708241510g4decf9d8kb90c76d0b067c6c6@mail.gmail.com>
References: <eb79828c0708241400n7d83028eh5ae4a2dd4c463f06@mail.gmail.com>
	<9e95df10708241432t2b974bd8n1168672cadaace22@mail.gmail.com>
	<eb79828c0708241510g4decf9d8kb90c76d0b067c6c6@mail.gmail.com>
Message-ID: <9e95df10708241601v56e2908eh3b08eb1b8f3483be@mail.gmail.com>

On 8/24/07, Lamonte Harris <pyth0nc0d3r at gmail.com> wrote:
> How to fix my code, wth that doesn't help solve anything really.the Tkinter
> tutorial doesn't even explain radio buttons correctly, let alone, everything
> else. gah. can you give a answer that I can work from.

You asked, "what can I do to fix this problem?". You stated this in
the singular, implying that there was one problem with your code to
fix. In reality, to fix your code you have to totally re-write it. You
need to slowly work your way through tutorials and go through all the
pain everyone else who has learned Python and Tkinter has had to go
through if you want to be a compitent coder. I know these may seem
like harsh words, so let me give you an example of working Radiobutton
code.

[code]
import Tkinter as tk

choices = {1:"One", 2:"Two", 3:"Three", 4:"Four"}
def main():
    root = tk.Tk()

    global v
    v = tk.IntVar()

    for i, name in choices.iteritems():
        b = tk.Radiobutton(root, text=name, variable=v, value=i)
        b.pack(anchor='w')

    tk.Button(root, text="Action?", command=print_val).pack(anchor='w')

    root.mainloop()

def print_val():
    k = v.get()
    print k, choices[k]

if __name__ == "__main__":
    main()

[/code]

I'm curious, what do you feel is incorrect about the Radiobutton
explanation? It seemed to work for me.

Matt


From http  Mon Aug  6 15:14:45 2007
From: http (Paul Rubin)
Date: 06 Aug 2007 12:14:45 -0700
Subject: Tkinter or wxpython?
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<46B73DE4.6040405@codebykevin.com>
	<1186421115.402000.88080@x35g2000prf.googlegroups.com>
	<46B75F31.9070208@codebykevin.com>
	<1186425241.246492.144340@d30g2000prg.googlegroups.com>
Message-ID: <7x4pjcqxui.fsf@ruckus.brouhaha.com>

kyosohma at gmail.com writes:
> Yeah...I would assume I would enjoy Tkinter more if I knew more tcl.
> Until that day arrives though, it will probably still be fairly
> confusing for me to figure out. I do like it's "pythonic" style
> though.

I've managed to program tkinter without knowing anything about tcl.
This manual is good:

  http://infohost.nmt.edu/tcc/help/pubs/tkinter/


From steve at holdenweb.com  Fri Aug 17 19:55:24 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 17 Aug 2007 19:55:24 -0400
Subject: Question about 'for' loop
In-Reply-To: <496954360708171545m6a0eff61la5fe270145246eab@mail.gmail.com>
References: <496954360708171545m6a0eff61la5fe270145246eab@mail.gmail.com>
Message-ID: <fa5ch4$bel$1@sea.gmane.org>

Robert Dailey wrote:
> Hi,
> 
> I noticed that the 'for' loop can be used inline with a list definition. 
> For example:
> 
> print [i for i in mylist]
> 
> My first question is what is the name for this? I couldn't find this 
> usage in the python docs; I only managed to learn about it through code 
> samples on the internet.
> 
That there is a "list comprehension".

> Secondly, I'm wondering how I can use this method of a for loop to 
> append strings to strings in a list. For example:
> 
> mylist = [
> "Hello ",
> "Hello again "
> ]
> 
> I should be able to do this:
> 
> print [ i + "World" for i in mylist ]
> 
> Which should yield the output:
> 
> ["Hello World", "Hello again world"]
> 
Who says you should? Beside you, that is. I am afraid the interpreter 
isn't psychic, and it doesn't have a DWIM [1] mode.

> However, instead I get an error message saying "TypeError: cannot 
> concatenate 'str' and 'list' objects"
> 
> How can I achieve the above? Thanks for reading.
> 
It's just a matter of understanding the syntax in a little more depth. 
In a week's time it will be blindingly obvious.

 >>> nicknames = ["bozo", "newbie", "newless cloob", "and welcome to 
c.l.py"]
 >>> [("hello " + name) for name in nicknames]
['hello bozo', 'hello newbie', 'hello newless cloob', 'hello and welcome 
to c.l.py']
 >>>

So, treat item [-1] from that list as the real sentiment of this message:

 >>> [("hello " + name) for name in nicknames][-1]
'hello and welcome to c.l.py'

regards
  Steve

[1]: Do What I Mean [and never mind what I say ...]
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From steve at holdenweb.com  Mon Aug 13 19:45:46 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Aug 2007 19:45:46 -0400
Subject: Assignments and Variable Substitution
In-Reply-To: <cfb58d850708131223y37ccb61y465fc2f964ad05e4@mail.gmail.com>
References: <f9q2qn$i4v$1@solaris.cc.vt.edu>
	<cfb58d850708131223y37ccb61y465fc2f964ad05e4@mail.gmail.com>
Message-ID: <f9qqf7$355$2@sea.gmane.org>

Evan Klitzke wrote:
> On 8/13/07, brad <byte8bits at gmail.com> wrote:
>> I'd like to do something like this:
>>
>> var = '123'
>> %s = [], %var
>>
>> So that, in the end, var is '123' and an empty list is named '123' as
>> well. The list assignments are created during a loop.
> 
> You can't assign a variable whose name is 123, but you can do this
> sort of thing with setattr.
> 
And why would you want a variable whose name is '123'?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bbxx789_05ss at yahoo.com  Fri Aug 24 14:28:09 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Fri, 24 Aug 2007 11:28:09 -0700
Subject: I can't get value of entry box, Tinker
In-Reply-To: <mailman.268.1187975584.32294.python-list@python.org>
References: <eb79828c0708240816o182b1e75o67fc9b27b6475051@mail.gmail.com>
	<mailman.268.1187975584.32294.python-list@python.org>
Message-ID: <1187980089.367178.81060@e9g2000prf.googlegroups.com>

Matt McCredie wrote:
> > What/should I, can I do?
>
> Fix your code?
>
> > def login():
> >     global e2,e1
> >     print e2.get()
> >     print e1.get()
>
> That should work.
>
> Matt

Try something like this:

import Tkinter as tk

root = tk.Tk()
entry = tk.Entry(root)
button = tk.Button(root, text="print text in textbox")

def on_button_click(event):
    print entry.get()

button.bind("<Button-1>", on_button_click)

entry.pack()
button.pack()
root.mainloop()



From sjmachin at lexicon.net  Thu Aug  2 19:30:39 2007
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 02 Aug 2007 16:30:39 -0700
Subject: (no) fast boolean evaluation ?
In-Reply-To: <mailman.1546.1186096771.22759.python-list@python.org>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<mailman.1546.1186096771.22759.python-list@python.org>
Message-ID: <1186097439.944587.165650@m37g2000prh.googlegroups.com>

On Aug 3, 9:19 am, "Evan Klitzke" <e... at yelp.com> wrote:
> On 8/2/07, Stef Mientki <S.Mientki-nos... at mailbox.kun.nl> wrote:
>
> > hello,
>
> > I discovered that boolean evaluation in Python is done "fast"
> > (as soon as the condition is ok, the rest of the expression is ignored).
>
> > Is this standard behavior or is there a compiler switch to turn it on/off ?
>
> This is standard behavior in every language I've ever encountered. If
> you are evaluating an and/or with side effects and you need both side
> effects to occur, you can trivially write functions implementing this
> behavior, e.g.
>

If each operand is of type bool (or, more generally,
isinstance(operand, int) is true), you could trivially use the & and |
operators.



From tylerca at jeld-wen.com  Wed Aug 15 11:30:03 2007
From: tylerca at jeld-wen.com (Azazello)
Date: Wed, 15 Aug 2007 08:30:03 -0700
Subject: Python Book Recommendations
In-Reply-To: <mailman.2015.1187189280.22759.python-list@python.org>
References: <d5506a9f0708141439v6a30d4c8l5092b30d269c1af4@mail.gmail.com>
	<Pine.LNX.4.44.0708141556370.5396-100000@violet.rahul.net>
	<1b31ae500708141638w77614014o6f382d0389bc69df@mail.gmail.com>
	<mailman.2015.1187189280.22759.python-list@python.org>
Message-ID: <1187191803.845011.30400@x35g2000prf.googlegroups.com>

On Aug 15, 7:47 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> If I could have only one book, I would buy "Core Python, Second
> Edition," by Wesley Chun.
>
> For the record, I own:
> Core Python, Second Edition (great)
> wxPython in Action (haven't used yet)
> Beginning Python (barely used)
> Python in a Nutshell (use as a reference, although interactive python
> dir() is more useful)
> Dive into Python (great book)
> Python Cookbook (great book)
> Python Pocket Reference (not very useful)
> Python Phrasebook (I love the Phrasebook series, but this isn't a
> necessary book)

I would like to add:

Foundations of Python Network Programming

I also use the Python Essential Reference.  (although all of the
information is probably online it's nice to have a solid paper
reference)



From gagsl-py2 at yahoo.com.ar  Mon Aug 13 01:13:42 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 13 Aug 2007 02:13:42 -0300
Subject: Ligmail bug?
References: <20070812005057.GA15805@ob41.org> <f9l3m2$hb0$1@sea.gmane.org>
	<20070812182439.GA2427@ob41.org> <46BEE9B8.8080904@holdenweb.com>
	<E9171170-9581-42C5-B68F-6F1442433246@leafe.com>
Message-ID: <op.twzfg4hxx6zn5v@a98gizw.cpe.telecentro.com.ar>

En Sun, 12 Aug 2007 22:14:08 -0300, Ed Leafe <ed at leafe.com> escribi?:

> On Aug 12, 2007, at 7:06 AM, Steve Holden wrote:
>
>> [Please reply via the list when a response is made via the list.
>
> 	The default behavior for this list should be to reply to the list,
> as you have pointed out. Yet for some unfathomable reason, the
> keepers of the list have set it up to default to reply to the
> original sender. This is nothing short of stupid, and I cast my vote
> (if I even have one) for changing this default to a more intelligent
> one, if for no other reason than to not have to constantly read
> comments like this chiding someone for acting in a predictable fashion.

Please read this  
<URL:http://woozle.org/~neale/papers/reply-to-still-harmful.html>

-- 
Gabriel Genellina



From exarkun at divmod.com  Wed Aug 22 09:32:47 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 22 Aug 2007 09:32:47 -0400
Subject: Fast socket write
In-Reply-To: <1187787707.377952.322280@57g2000hsv.googlegroups.com>
Message-ID: <20070822133247.8162.1682243074.divmod.quotient.740@ohm>

On Wed, 22 Aug 2007 13:01:47 -0000, Greg Copeland <gtcopeland at gmail.com> wrote:
>On Aug 21, 9:40 pm, Bikal KC <nepbabucxspamf... at yahoo.ca> wrote:
>> Greg Copeland wrote:
>> > I'm having a brain cramp right now.  I can't see to recall the name of
>>
>> Is your cramp gone now ? :P
>
>
>I wish.  If anyone can remember the name of this module I'd realy
>appreciate it.

Perhaps you are thinking of the sendfile(2) call available on Linux.  "Fast
socket write" is quite vague though, so perhaps not.  If this isn't what you
had in mind, maybe you can try to provide more details about the functionality
to narrow the field a bit.

Jean-Paul


From thomas at jollans.com  Fri Aug 17 07:17:37 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Fri, 17 Aug 2007 13:17:37 +0200
Subject: clarification
In-Reply-To: <aa405c1f0708162332t7b6dbdd6o2cc0f512dc821d7b@mail.gmail.com>
References: <aa405c1f0708162332t7b6dbdd6o2cc0f512dc821d7b@mail.gmail.com>
Message-ID: <200708171317.39072.thomas@jollans.com>

On Friday 17 August 2007, Beema shafreen wrote:
> hi everybody,
> i have a file with data separated by tab
> mydata:
> fhl1    fkh2
> dfp1    chk1
> mal3    alp14
> mal3    moe1
> mal3    spi1
> mal3    bub1
> mal3    bub3
> mal3    mph1
> mal3    mad3
> hob1    nak1
> hob1    wsp1
> hob1    rad3
> cdr2    cdc13
> cdr2    cdc2
> shows these two are separated by tab represented as columns
> i have to check the common data between these two coloumn1 an coloumn2
> my code:
> data = []
> data1 = []
> result = []
> fh = open('sheet1','r')
> for line in fh.readlines():
>         splitted = line.strip().split('\t')
>         data.append(splitted[0])
>         data1.append(splitted[1])
>         for k in data:
>                 if k in data1:
>                         result.append(k)
>                         print result
> fh.close()
>
> can you tell me problem with my script and what should is do for this

No, I have not tested it. You tell us the problem, and we might understand the 
situation better than you.

-- 
      Regards,                       Thomas Jollans
GPG key: 0xF421434B may be found on various keyservers, eg pgp.mit.edu
Hacker key <http://hackerkey.com/>:
v4sw6+8Yhw4/5ln3pr5Ock2ma2u7Lw2Nl7Di2e2t3/4TMb6HOPTen5/6g5OPa1XsMr9p-7/-6


From kyosohma at gmail.com  Wed Aug 15 14:02:48 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 15 Aug 2007 11:02:48 -0700
Subject: Hijack! Different book: (was: Opinions about this new Python book?
In-Reply-To: <13c6fb3pntv6n13@corp.supernews.com>
References: <mailman.1957.1187093157.22759.python-list@python.org>
	<1187096231.194685.86030@m37g2000prh.googlegroups.com>
	<20070814154913.D8C3C1E400A@bag.python.org>
	<8a6b8e350708141020q495b22der4c362ee3df618d82@mail.gmail.com>
	<mailman.1979.1187113641.22759.python-list@python.org>
	<1187117012.088495.247890@q4g2000prc.googlegroups.com>
	<1187191950.037749.8050@z24g2000prh.googlegroups.com>
	<13c6fb3pntv6n13@corp.supernews.com>
Message-ID: <1187200968.181602.310320@g12g2000prg.googlegroups.com>

On Aug 15, 12:52 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Wed, 15 Aug 2007 08:32:30 -0700, kyoso... at gmail.com declaimed the
> following in comp.lang.python:
>
> > More on the subject...the writer is very conversational in tone and it
> > makes for a light read in the first 1 1/2 chapters that I've
> > completed. I've noticed a couple of sentence errors, but nothing in
> > the code.
>
>         Hopefully it isn't quite as annoying as some of what I've found in
> the Turbogears book that recently arrived from Amazon. (Rapid Web
> Applications with TurboGears)
>
>         I've so far found a couple of pages where editing rewrites of
> paragraphs left redundancies. Example -- section 4.3:
>
> second paragraph
>
> """
> ... We set up some variables, and then create a new /Bookmark/ object
> with the exact same syntax we used earlier in the chapter when we
> created our first bookmark through /tg-admin shell/.
> """
>
> sentence/sample code/next paragraph
>
> """
> This method sets up a few variables, and then creates a new /Bookmark/
> object using the exact same syntax we used earlier in the chapter when
> we created out first bookmark through /tg-admin shell/. ...
> """
>
>         That's the most blatant, so far, but I've found a few other examples
> where a paragraph below a code sample basically restates the paragraph
> above it; and the paragraph above seems confusing because it reads as if
> it is commenting on prior material, not following material.
>
> It's as if the book had been first written using, say, "describe, show
> code", then edited by someone favoring "show code, explain" style... And
> the two versions were then merged by a third person... Hmmm, there are
> three authors...
>
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfr... at ix.netcom.com             wulfr... at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>                 HTTP://www.bestiaria.com/

I have this book, but I haven't read it. However, I think the user
reviews on Amazon complained quite a bit about the TurboGears book's
writing and how it was pretty lousy. Even the code was broken. I look
forward to seeing just how truly awful it is.

As for this book, "Python Power!", I haven't noticed anything like
what you describe. An example issue I've noticed is stuff like this
sentence:

"There are a few catches and caveats work mentioning, however"

Obviously, "work" should be "worth". There are instances like that
where a real editor should have caught it, but a Word Processor
wouldn't.

Mike



From llasram at gmail.com  Wed Aug 15 15:58:03 2007
From: llasram at gmail.com (Marshall T. Vandegrift)
Date: Wed, 15 Aug 2007 15:58:03 -0400
Subject: Coroutines and argument tupling
Message-ID: <87zm0so9is.fsf@seneca.iss.local>

Hi,

I'm trying to write a decorator which allows one to produce simple
coroutines by just writing a function as a generator expression which
re-receives it's arguments as a tuple from each yield.  For example:

    @coroutine
    def nextn(n=1):
        values = []
        for i in itertools.count():
            while n <= 0:
                (n,) = (yield values)
                values = []
            values.append(i)
            n = n - 1
    
    print nextn()     # => [0]
    print nextn(3)    # => [1, 2, 3]
    print nextn(n=2)  # => [4, 5]
    print nextn()     # => [6]

I've got this working, but have two questions.  First, is there a better
way to generically transform function arguments into a tuple than I'm
doing now?  That way being with this pretty hideous chunk of code:

    class ArgPacker(object):
        def __init__(self, function):
            args, varargs, varkw, defaults = inspect.getargspec(function)
            self.args = args or []
            self.varargs = (varargs is not None) and 1 or 0
            self.varkw = (varkw is not None) and 1 or 0
            self.nargs = len(self.args) + self.varargs + self.varkw
            defaults = defaults or []
            defargs = self.args[len(self.args) - len(defaults):]
            self.defaults = dict([(k, v) for k, v in izip(defargs, defaults)])
    
        def pack(self, *args, **kwargs):
            args = list(args)
            result = [None] * self.nargs
            for i, arg in izip(xrange(len(self.args)), self.args):
                if args:
                    result[i] = args.pop(0)
                elif arg in kwargs:
                    result[i] = kwargs[arg]
                    del kwargs[arg]
                elif arg in self.defaults:
                    result[i] = self.defaults[arg]
                else:
                    return None
            if self.varargs:
                result[len(self.args)] = args
            elif args:
                return None
            if self.varkw:
                result[-1] = kwargs
            elif kwargs:
                return None
            return tuple(result)

I also tried a version using exec, which was much tighter, but used
exec.

Second, am I trying to hammer a nail with a glass bottle here?  The
ugliness of the ArgPacker class makes me suspect that I should perhaps
just manually create and track a generator when I need a function with
generator-like properties.

Thanks!

-Marshall



From kw at codebykevin.com  Mon Aug  6 11:27:32 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Mon, 06 Aug 2007 11:27:32 -0400
Subject: Tkinter or wxpython?
In-Reply-To: <7xps204tin.fsf@ruckus.brouhaha.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
Message-ID: <46B73DE4.6040405@codebykevin.com>

Paul Rubin wrote:

> 
> Tkinteger (dang, I always end up typing it that way, I won't even
> bother fixing the error) is easy to use for simple gui's, and it's
> part of the standard python distro which for me is a big advantage (no
> extra crap to download).  However, the widget set is rather ugly and
> doesn't blend in well with anyone's native widgets; the widget
> selection itself is rather narrow, and I think kyosohma may be right
> that it doesn't scale well to complex gui's.  I've looked at the code
> for IDLE's gui and it's terrifying.

It's entirely possible to make sophisticated GUI's in Tkinter, but you 
are right, most people don't. Part of the issue is that Tkinter 
developers haven't kept up with what's going on in Tk and instead use 
outdated, ugly widget sets like Tix, PMW, and so on. Making use of the 
available wrappers for current Tk libraries such as BWidgets, Tile, 
Tablelist, TkTreeCtrl, and so on allows you to make UI's every bit as 
polished as what comes with wxPython: tree views, multi-column lists, 
notebook tabs, comboboxes, etc., with platform-specific theming 
(XP/Vista, Aqua/OS X, and X11).

For more references, see:

http://tkinter.unpythonic.net/wiki/TileWrapper
http://tkinter.unpythonic.net/wiki/TableListWrapper
http://tkinter.unpythonic.net/wiki/TableListTileWrapper
http://tkinter.unpythonic.net/wiki/PyLocate
http://tkinter.unpythonic.net/wiki/PyLocateTile
http://tkinter.unpy.net/bwidget/
http://tkinter.unpy.net/wiki/NoteBook
http://klappnase.zexxo.net/TkinterTreectrl/index.html

> 
> At this point I think nobody should write desktop gui apps without a
> good reason.  There is a fairly flexible and easy to program gui
> already running on almost every desktop, namely the web browser.
> Before you write a gui using some client side toolkit, ask yourself
> whether you can instead embed a web server in your application and
> write an HTML gui.  That approach is not always the answer, but it has
> considerable advantages when you can do it that way.

Given a choice between a rich desktop client and a web app, I'd choose 
the desktop client in most cases. It's just much more pleasant to work 
with .

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From steve at holdenweb.com  Thu Aug  2 00:54:29 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Aug 2007 00:54:29 -0400
Subject: beginner in python
In-Reply-To: <aa405c1f0708012127j471c9b2dl35b74cda9f595d09@mail.gmail.com>
References: <aa405c1f0708012127j471c9b2dl35b74cda9f595d09@mail.gmail.com>
Message-ID: <f8ro29$gl2$1@sea.gmane.org>

Beema shafreen wrote:
> hi everybody,
>    I am beginner in python
>  I have to calculate the euclidean distance between the atoms from a pdb 
> file
> i have written the the code and its shows me some error ,
> the code:
> import re
> import string
> import math
> ab =[]
> x_value = []
> y_value = []
> z_value = []
> fh = open("1K5N.pdb",'r')
> for atom in fh.readlines():
>    a = atom.strip()
>    pattern= re.compile('^ATOM.*')
>    atom_file= pattern.search(a)
>    if  atom_file:
>        atom_data = atom_file.group()
>        x_coordinate = atom_data[31:38]
>        y_coordinate = atom_data[39:46]
>        z_coordinate = atom_data[47:54]
>        x_value.append(x_coordinate)
>        y_value.append(y_coordinate)
>        z_value.append(z_coordinate)
> for x in range(len(x_value)):
>              x_co = float(x_value[x])-float(x_value[x+1])
>              y_co = float(y_value[x])-float(y_value[x+1])
>              z_co = float(z_value[x])-float(z_value[x+1])
>              data = math.sqrt(x_co)*(x_co)+(y_co)*(y_co)+(z_co)*(z_co)
>              print data
> ~
> and the error ,message
>  File "pdb_fetching.py", line 22, in ?
>     x_co = float(x_value[x])-float(x_value[x+1])
> IndexError: list index out of range
> 
> 
> can you suggest me the mistake i have made
> 
suppose you have an x_value list of length 6. Valid indexes go from 0 to 
5. Then x is going to start at 0 and go up to 5. The last time around 
the loop the expression "x_value[x+1]" is going to try and use 6 as an 
index, thus trying to address past the end of the list.

Since the data values are the RMS differences between successive points, 
there are only five differences for a six-element list.

Try using

     for x in range(len(x_value)-1):

instead.

By the way, you presented your question very well - all necessary 
information was there, and you didn't put in any mistaken guesses about 
what might be going wrong. Well done, and welcome to Python! You will 
find you can learn it very quickly.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From steve at holdenweb.com  Fri Aug 31 15:24:52 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 15:24:52 -0400
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188585630.539835.242460@i38g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>	<1188364909.397692.209170@q4g2000prc.googlegroups.com>	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>	<1188369928.755777.142690@i38g2000prf.googlegroups.com>	<46d75191$0$401$426a74cc@news.free.fr>	<1188518054.298017.90610@x35g2000prf.googlegroups.com>	<46d76595$0$4013$426a74cc@news.free.fr>	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>	<1188525647.003223.199620@q5g2000prf.googlegroups.com>	<mailman.181.1188527203.28954.python-list@python.org>	<1188537516.622167.115080@z24g2000prh.googlegroups.com>	<mailman.217.1188577500.28954.python-list@python.org>
	<1188585630.539835.242460@i38g2000prf.googlegroups.com>
Message-ID: <fb9pu6$55a$1@sea.gmane.org>

Russ wrote:
> Steve Holden wrote:
> 
>> Frankly I am getting a little tired of they way you are unable to even
>> recognize that your readers may well have a sensible appreciation of the
>> difficulties about which you write. As has been pointed out already,
>> many readers here are extremely experienced programmers.
> 
>> You said in an earlier post "that's not an insult", but that isn't
>> really up to you to decide. If it gives offense then it probably is,
>> whether it was intended to do so or not. You don't seem to appreciate
>> the insulting nature of your tone, and calling people bozos is not
>> likely to endear you to most c.l.py readers since it comes off as arrogant.
> 
> You quoted what I wrote in reply to a personal attack against me, but
> you conveniently
> neglected to quote the original insult that I was replying to. OK,
> I'll concede that I shouldn't
> have replied to a personal insult with another insult, but why am I
> the only one at fault here
> rather than the guy who started it?
> 
You aren't, and if I wasn't being even-handed I apologize.

> Frankly, Mr. Holden, I'm getting a bit tired of the clannish behavior
> here, where
> "outsiders" like me are held to a higher standard than your "insider"
> friends. I don't know
> who you are, nor do I care what you and your little group think about
> me.
> 
Well that's a healthy attitude, but I am concerned that the Python 
community should be as welcoming as possible, so I don't like the fact 
that you feel you are being treated differently from anyone else.

> As for DbC or what I call "self-testing code," I have come to the
> (tentative) realization that
> it is easy to implement in current Python -- without resorting to the
> "decorators" hack.
> OK, maybe this should have been obvious to me from the
> start, but here goes:
> 
> All you really need to test the pre-conditions of a function
> is a call at the top of the function to another function that checks
> the inputs. To test the
> post-conditions, you just need a call at the bottom of the function,
> just before the return,
> that checks the return values. Those functions can also check the
> invariants. Then you
> define a global variable to switch all the self-test functions on or
> off at once.
> 
It does constrain functions to return only from the bottom of their 
code, though, which not all Python functions currently do. Though 
there's nothing to stop you putting the calls before every return.

> An advantage of this approach is that all the self tests can be put at
> the bottom of the file
> (or perhaps in another file) to reduce "clutter" in the primary code.
> 
> I'd still prefer PEP 316, but this seems like a reasonable
> alternative.
> 
> One suggestion I have for PEP 316 is to provide a way to place the
> self-test
> checks in a separate file to reduce clutter.
> 
That would be a sensible suggestion. It would also be possible to guard 
the lengthier tests with "if debug" to allow them to be omitted 
(presumably along with their imports with a little further effort in 
code organization) in (optimized) production mode where timings were 
critical.

This could allow the benefits of DbC and unit testing at the same time.

Putting the verification code into external functions does assume that 
global variables aren't used in the pre- and post-conditions, but I 
presume that's a part of the regime anyway.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From mail at microcorp.co.za  Wed Aug  8 04:01:12 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 8 Aug 2007 10:01:12 +0200
Subject: Issues of state (was: Tkinter or wxpython?)
References: <op.tv98rva4wepdt4@ericb.pragmadev><mailman.1680.1186416061.22759.python-list@python.org><7x3aywr4tc.fsf@ruckus.brouhaha.com><mailman.1684.1186422197.22759.python-list@python.org><gg9mo4-p2m.ln1@lairds.us>
	<7x8x8mpn37.fsf@ruckus.brouhaha.com>
Message-ID: <014101c7d992$b1a23a00$03000080@hendrik>

"Paul Rubin" <http:/...nvalid> wrote:

> claird at lairds.us (Cameron Laird) writes:
> > >application in the web app model (I haven't even touched on the whole
> > >stateless HTTP being mapped to a stateful environment issue, or the
> > >need to manage the local web server) actually buys you anything. I
> > .
> > Go ahead:  touch on statefulness.  I've been pondering the topic
> > lately, and wonder what's new on the subject.  I find it plenty
> > difficult to cast this as anything but a big liability for the
> > Web app team.
> 
> I'm not sure what you're getting at in this context.  You can write a
> desktop app where the window system communicates with a gui toolkit
> through a socket (at least that's how X windows works), or you can
> write a web app where a browser communicates with an http listener
> through a socket.  What's the difference, as far as application state
> is concerned?  
> 
> I haven't used wxpython but for tkinter you'd typically have a gui
> event loop in its own thread, communicating with the application
> through queues.  Similarly you can use BaseHTTPServer to collect
> browser hits and get the data out of them with the cgi module
> functions before passing them to the app.  If you want to handle
> multiple concurrent users you get into the usual issues of web
> servers, but if you're just doing a single user web implementation as
> an alternative to a desktop gui, some rudimentary locking is probably
> enough to stop accidental simultaneous connections.
> 
> If the application is simple enough, you can just write it as a cgi
> and keep the state in disk files.

Something that is often overlooked is keeping some state in the buttons.
It involves changing the text, colour and the command binding, and 
possibly setting up a callback using .after for time outs, if necessary.
You can do quite complicated sequences like this, if you have a mind to.

Its a bit of a PITA - but then all state machines are, no matter how you
implement them.  Their chief advantage is that they force you to think
of all the possibilities.

- Hendrik

--
Enrol now in Heavy Henry's Wholesome Hackadamy,
for a course in single button GUI design.
The sacred crocodiles are for the moment leashed.




From newsreturns at biszumknie.de  Thu Aug 23 11:06:40 2007
From: newsreturns at biszumknie.de (Andreas Lobinger)
Date: Thu, 23 Aug 2007 17:06:40 +0200
Subject: expat error, help to debug?
Message-ID: <fak7q4$ahn$1@daniel-new.mch.sbs.de>

Aloha,

i'm trying to write an xml filter, that extracts some info about
an .xml document (with external entities), esp. start elements and
external entities. The document is a DOCBOOK xml and afacs
well formed and passes our docbook toolchain (dblatex etc.).

My parser is (very simple):
[115] scylla(scylla)> more pbxml.py

class xmlhandle:
     def __init__(self):
         self.parser_stack = [];
         self.parser = None;

     def se(self,name,attr):
         print "s", self.parser.CurrentLineNumber, name, attr

     def ex(self,context,baseid,n1,n2):
         print "x",context,n1,n2

def fromxml(fname):
     import xml.parsers.expat
     p = xml.parsers.expat.ParserCreate()
     xl = xmlhandle()
     p.StartElementHandler = xl.se
     p.ExternalEntityRefHandler = xl.ex
     xl.parser = p
     p.ParseFile(file(fname))
     return

if __name__ == "__main__":
    import sys
    fromxml(sys.argv[1])

my document (in 2 parts):

[116] scylla(scylla)> more s3.xml
<?xml version="1.0"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
  "/usr/share/xml/docbook/xml/4.2/docbookx.dtd"
[
<!ENTITY bookinfo SYSTEM "bookinfo.xml">
]>
<book>
&bookinfo;
<chapter id="technicalDescription"><title>technical description</title>
         <para>
         This chapter includes specification of the main simulation loop.
         </para>
</chapter>
</book>

[118] scylla(scylla)> more bookinfo.xml
<bookinfo>
   <title>BookTitle</title>
   <authorgroup>
     <author>
         <firstname>A</firstname>
         <surname>B</surname>
     </author>
   </authorgroup>
</bookinfo>

The run produces:

[120] scylla(scylla)> python pbxml.py s3.xml
s 7 book {}
x bookinfo bookinfo.xml None
s 9 chapter {u'id': u'technicalDescription'}
s 9 title {}
s 10 para {}
Traceback (most recent call last):
   File "pbxml.py", line 25, in ?
     fromxml(sys.argv[1])
   File "pbxml.py", line 20, in fromxml
     p.ParseFile(file(fname))
TypeError: an integer is required

Anyone any idea where the error is produced?
Anyone any idea how to debug(? if it's really a bug or
missunderstanding of expate) this?

Hoping for an answer and wishing a happy day,
		LOBI


From llasram at gmail.com  Thu Aug 30 10:28:33 2007
From: llasram at gmail.com (Marshall T. Vandegrift)
Date: Thu, 30 Aug 2007 10:28:33 -0400
Subject: strings (dollar.cents) into floats
References: <12B58F2B-2F4F-4F6A-9F75-7444427B8CA8@email.it>
Message-ID: <87ejhlp04u.fsf@seneca.iss.local>

luca bertini <luca.bertini at email.it> writes:

> i have strings which look like money values (ie 34.45)
> is there a way to convert them into float variables?
> everytime i try I get this error: "numb = float(my_line) ValueError:  
> empty string for float()"
> "

You actually have problems here -- the immediate, and the one which will
get you later :-).  First, that error message indicates that you passed
an empty string to `float()`:

    >>> float("")
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
    ValueError: empty string for float()

Second, if you the values your script is handling are actually monetary
values, you really don't want to represent them with `float`s anyway:

    >>> float("34.45")
    34.450000000000003

Binary floating point values are necessarily inexact.  I'm not 100% sure
what the best-practices are for representing monetary values in Python,
but the `decimal` module is probably a good start.

HTH,

-Marshall



From arkanes at gmail.com  Mon Aug  6 12:00:47 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 6 Aug 2007 11:00:47 -0500
Subject: Tkinter or wxpython?
In-Reply-To: <7xlkcopu4r.fsf@ruckus.brouhaha.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
Message-ID: <4866bea60708060900u15c2223erd8858064095a858e@mail.gmail.com>

On 06 Aug 2007 08:20:20 -0700, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> "Chris Mellon" <arkanes at gmail.com> writes:
> > No native look and feel - constrained by the browser.
>
> Might or might not matter for the application, especially considering
> that tkinter is part of the discussion.
>

The point is that you have no option with the browser - even Tkinter
has platform theming support now.

> > No control over browser UI idioms. I had to write this post twice
> > because the text control lost focus and I hit backspace, going back in
> > the history and losing my work.
>
> Sounds weird, I'm used to having stuff in text boxes stay in the
> browser, and why did backspace have that effect anyway?
>

On Windows, backspace is a browser global hotkey that means "go back
once in the history". When the text box lost focus, hitting backspace
navigated back. Gmail uses ajax instead of a page load when you start
typing a reply, and the fragile tricks it uses to try to keep the
browser history and the ajax state in sync don't work in this case.
It's a specific example of the general problems of the browser as
application platform.

> > No native integration - no "open file", no "browse the filesystem", no
> > rich drag and drop, no copy/paste.
>
> File i/o and file system browsing are available from javascript if the
> user grants permission.

Which they won't (I don't even know how, from Firefox), so you can't
rely on it working. You can mitigate with your own browser host, or if
you write all your own file browsing in HTML and move it into your
local browser. Poor solutions all around.

> File system browsing for the limited purpose
> of file upload is available in regular html.
>Copy/paste of ordinary
> text is always available.

But not of anything else. I've often wanted to drag & drop a file onto
the file upload box in gmail, for example.

>However, this type of requirement is what I
> mean by a "good reason" to write a desktop gui.  It applies to some
> applications, not all.
>

How about something as simple as context menus? You can't reliably
override the browser context menu from a web page unless, again, you
provide your own browser host. This is a good thing, because a browser
needs to be wary of arbitrary malicious web pages. They aren't good
application hosts.

Keyboard shortcuts that happen to conflict with whatever the browser
or any of its plugins happen to use, too. Although I notice that
Firefox now allows web pages to override that, which is a little sad.

> > No or poor dialogs. Poor multiple window support.
>
> Might or might not matter depending on the application.  Most dialogs
> can be done with html.  Multiple windows are evil most of the time,
> and should instead by done with multiple panes or cells in a single
> window.
>

Multiple windows are the common case on the mac. They're not rare on
other platforms as well. The fact that your windows are constrained to
the browser and can't be torn off is a large limitation. No toolbars,
no palettes, no modal dialogs (except on IE, or if  you constrain them
to the browser). Lots of unnecessary chrome on your extra windows, too
(see below).

> > More platforms to develop on and test with.
>
> Compared to a desktop app?  I don't think so.
>

Did you ever try counting? X browsers * Y browser versions * Z
platforms. There are javascript and CSS bugs and differences between
all of these. From my own professional experience, it's not any easier
to account for browser differences than it is for platform
differences. It's getting better as more people jump on the web
bandwagon and CSS and JS abstraction libraries show up, but it's not
even good as the available platform abstraction libraries like
wxWidgets or Qt.

> > Limited to CSS box model for layout.
>
> Might or might not matter depending on the application.  If you're
> doing a consumer app that has to look slick, you have no choice but to
> use something like wxwidgets (tkinter won't cut it either).  If you're
> doing a special purpose office or industrial app, slickness isn't
> important.
>

I'm not talking about chrome and slickness. I'm talking about basic
usability concerns like "will this work with a higher font size" and
"will it reflow in a sensible way if I change the window size". The
CSS box model works okay for text, it's not so good for widgets. More
than a few web apps end up writing their own layout engines in dynamic
javascript. This is sad. While I'm talking about chrome, add "wasted
screenspace due to browser chrome" to a limitation of web apps, again
unless you write your own browser host. This is another example of a
feature that makes a good browser (don't let arbitrary web pages mess
with my web browser functionality) clashing with the desires of a good
application (don't waste screen space with irrelevant functionality).

> > The web is a terrible application platform. There is not a single web
> > application in existence which has even half the UI functionality of a
> > rich client application.
>
> Some of us consider simple interfaces with consistent, familiar
> (i.e. web) elements to be a good thing.  Fancy client interfaces are
> ok if you feel you need to make a style statement, but are often
> unnecessary if you just want to get something done.
>

Man, you should be in PR with the way you spin things. You can't
implement anything except the most trivial of applications using only
the simple, familiar web elements like HTML forms. Anything more
complicated than that needs to be done with DHTML and probably AJAX,
and those UI elements don't look anything like the familiar ones. You
go in one breath from saying that you can implement dialogs in HTML to
saying that the rich client is the *less* familiar of the interfaces?

> > There are some (even many) applications for which the benefit of
> > global access and easy deployment makes up for the lack in
> > functionality, but statements like "At this point I think nobody
> > should write desktop gui apps without a good reason" are simply
> > ludicrously misguided.
>
> Well, I don't say that good reasons don't exist, I just see a lot of
> desktop apps that could be done just as well as web apps, i.e. for
> those, the good reason didn't exist.
> --

If you'd said "if you're making something really simple that has
limited rich UI or data entry needs, consider a web application
instead" I wouldn't have posted. A web application is something you
make because the deployment and access benefits outweigh the UI and
integration limitations, not as your default "go to" whenever you
create an application.

I'd like an example you have of a desktop application that could have
just as easily been a web application. Bonus points if it's not a CRUD
screen, and double bonus if you don't just handwave away things like
file browsing. Although there are benefits even for the crud screen -
I've written screens and applications for data entry professionals and
they almost always prefer the speed optimizations you can make in a
client application.


From josh at tcbug.org  Tue Aug  7 08:38:50 2007
From: josh at tcbug.org (Josh Paetzel)
Date: Tue, 7 Aug 2007 07:38:50 -0500
Subject: ensuring GNU readline isn't used
Message-ID: <20070807123850.GV83613@tcbug.org>

Is there a way to ensure that GNU readline isn't used (even though
support may have been compiled in?).  I'm experiencing a licensing
problem, I'd like to use the "cmd" module, for example, but my code is
proprietary and hence, if cmd uses readline, I can't use cmd.
Unfortunately, I can't control if the Python interpreter my customers
may be using has readline compiled in.  So, I'm wondering if there is
anyway to tell Python libraries like "cmd" to not use GNU's readline?
 
Alternatively, could we just include pyreadline as readline instead?

-- 
Thanks,

Josh Paetzel
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From sjoerd at intercue.nl  Wed Aug  8 10:43:25 2007
From: sjoerd at intercue.nl (Sjoerd Op 't Land)
Date: Wed, 08 Aug 2007 16:43:25 +0200
Subject: Stop a thread on deletion
Message-ID: <f9ckqg$ghi$1@netlx020.civ.utwente.nl>

Hello all,

I'm using threading for generating video content. The trouble is how to 
kill the thread, because there are multiple (simultaneous) owners of a 
thread. Ideally, a flag would be set when the reference count of the 
thread becomes zero, causing the run() loop to quit. Example:

import threading
import time
import gc

class myThread(threading.Thread):
   def __init__(self):
     self.passedOut = threading.Event()
     threading.Thread.__init__(self)
   def __del__(self):
     self.passedOut.set()
   def run(self):
     i = 0
     while not self.passedOut.isSet():
       i += 1
       print "Hi %d" % i
       time.sleep(0.25)


a = myThread()
a.start()
time.sleep(2.5)
a = None
time.sleep(2.5)

Unfortunately, this doesn't work. When I remove the while-loop, __del__ 
is called, actually. Appearantly there is still some reference to the 
thread while it is running.

I tried gc.get_referrers(self), but it seems to need some parsing. I'm 
not sure how to implement that and I'm not sure whether it will work 
always or not.

Thanks in advance for any suggestion,
Sjoerd Op 't Land


From steve at holdenweb.com  Mon Aug 13 21:43:27 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Aug 2007 21:43:27 -0400
Subject: wxPython before MainLoop
In-Reply-To: <13c1v79hs0dob3@corp.supernews.com>
References: <13bl9a75laqcm70@corp.supernews.com>	<13bnh5bs4b9h427@corp.supernews.com>	<5i3b1jF3n5bdtU1@mid.individual.net>
	<13c1v79hs0dob3@corp.supernews.com>
Message-ID: <f9r1bp$k8g$1@sea.gmane.org>

[david] wrote:
> Well yes, I have tried this app with native windows,
> and I know how to do it.
> 
> But if all wxPython can offer is a poor imitation
> of MFC, I'm better off using MFC aren't I?
> 
> And too all those people who wrote back to insist
> that users MUST explicitly build a multi-threaded
> framework for wxPython:
> 
> It's supposed to already be a framework :~)
> 
The answer is simple. If you don't see any advantage to using wxPython 
then don't use it. Personally I believe wxPython is far from a poor 
imitation of MFC, but if you are already familiar with MFC then go ahead 
and use it.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From rebel-6-out at planet.nl  Wed Aug 22 12:14:30 2007
From: rebel-6-out at planet.nl (marco Starglider)
Date: Wed, 22 Aug 2007 18:14:30 +0200
Subject: porting vc++ project to python?
Message-ID: <46cc611f$0$25500$ba620dc5@text.nova.planet.nl>

hi,

i have a very large project in visual studio2005->visual c++ in windowsxp.
i'd like to port it, or my next project,  over to python.
is this possible without rewriting all my code?
are there multiple options to do this?
my project is so large, that entirely rewriting it
is actually no option.

regards,

m

ps i guess, it's an option to transform my current code into one or more
python extensions/modules, and then calling them from a python core
module?




From gherzig at fmed.uba.ar  Fri Aug 10 08:57:53 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Fri, 10 Aug 2007 09:57:53 -0300
Subject: Question about properties.
In-Reply-To: <1186742730.729034.256800@i13g2000prf.googlegroups.com>
References: <1186741289.074717.174370@e16g2000pri.googlegroups.com>	<5i2t7dF3kqc46U3@mid.uni-berlin.de>
	<1186742730.729034.256800@i13g2000prf.googlegroups.com>
Message-ID: <46BC60D1.50405@fmed.uba.ar>

king kikapu wrote:

>On Aug 10, 1:33 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>  
>
>>On Fri, 10 Aug 2007 03:21:29 -0700, king kikapu wrote:
>>    
>>
>>>Hi,
>>>      
>>>
>>>i read in a book the following code snippet that is dealing with
>>>properties:
>>>      
>>>
>>>class ProtectAndHideX(object):
>>>    def __init__(self, x):
>>>        assert isinstance(x, int), '"x" must be an integer!"'
>>>        self.__x = ~x
>>>      
>>>
>>>    def get_x(self):
>>>        return ~self.__x
>>>      
>>>
>>>    x = property(get_x)
>>>      
>>>
>>>Can anyone please help me understand what the symbol "~" does here ??
>>>      
>>>
>>This has nothing to do with properties.  For integer objects ``~`` is the
>>bitwise negation or invertion operator.
>>
>>Ciao,
>>        Marc 'BlackJack' Rintsch
>>    
>>
>
>Xmmm...ok then but what is actually doing there ?? I removed it and
>things seems to work the same way...
>
>  
>
I guess it is the `Hide' part of the Protectand*Hide* class.
Gerardo


From jgodoy at gmail.com  Fri Aug 31 21:18:09 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Fri, 31 Aug 2007 22:18:09 -0300
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<7xwsvcc9yz.fsf@ruckus.brouhaha.com>
	<1i3p8lm.19738kn1q0gkouN%aleax@mac.com>
	<1188587846.687895.69240@q5g2000prf.googlegroups.com>
Message-ID: <38rmq4-cq.ln1@strongwill.g2ctech>

Russ wrote:

> Alex, I think you are missing the point. Yes, I'm sure that web
> searches are critical to
> Google's mission and commercial success. But the point is that a few
> subtle bugs cannot
> destroy Google. If your search engines and associated systems have
> bugs, you fix them
> (or simply tolerate them) and continue on. And if a user does not get
> the results he wants,
> he isn't likely to die over it -- or even care much.

But if this pattern of not getting wanted results is common, then the user
will migrate to alternative search engines and this will *kill* the
business.  Wrong results won't impact ONE search, but many will impact the
company business and will be part of the recipe to take it out of business. 

> Online financial transactions are another matter altogether, of
> course. User won't die, but
> they will get very irate if they lose money. But I don't think that's
> what you are talking about
> here.

Lets make someone loose his job and have all his money commitments
compromised because of this money lost and we might be talking about people
taking their lives.

Again, this isn't 100% sure to happen, but it *can* happen.  

As it happens with a peacemaker: the user won't die if his heart skips one
beat, but start skipping a series of them and you're incurring in serious
problems.

Just because the result isn't immediate it doesn't mean it isn't critical.




From jjl at pobox.com  Sun Aug  5 11:13:01 2007
From: jjl at pobox.com (John J. Lee)
Date: Sun, 05 Aug 2007 15:13:01 GMT
Subject: A question on plugin design
References: <mailman.1643.1186312593.22759.python-list@python.org>
Message-ID: <87fy2yrp4y.fsf@pobox.com>

Grzegorz S?odkowicz <jergosh at wp.pl> writes:
[...]
> I'd also be grateful for pointers to a well designed Pythonic plugin
> architecture but I'd much prefer a small project with a simple API.

Google for setuptools and Python eggs.  Search for "entry point" on
the setuptools page.


John


From paul.sijben at xs4all.nl  Wed Aug 22 08:07:22 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Wed, 22 Aug 2007 14:07:22 +0200
Subject: python 2.5.1 segfault, multithreading & dual core issue?
In-Reply-To: <87r6lxx8qk.fsf@mulj.homelinux.net>
References: <46caf049$0$239$e4fe514c@news.xs4all.nl>
	<87r6lxx8qk.fsf@mulj.homelinux.net>
Message-ID: <46cc26f9$0$245$e4fe514c@news.xs4all.nl>

thanks very much! I am currently compiling python with the patch and
will test it over the coming days.

Paul

Hrvoje Niksic wrote:
> Paul Sijben <paul.sijben at xs4all.nl> writes:
> 
>> I am running a multi-threaded python application in a dual core
>> intel running Ubuntu.
> [...]
> 
> Judging from the stack trace, this patch has a good chance of fixing
> your problem:
> 
>     http://mail.python.org/pipermail/python-dev/2007-August/074232.html


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Aug 15 16:30:50 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 15 Aug 2007 22:30:50 +0200
Subject: Coroutines and argument tupling
References: <mailman.2032.1187207899.22759.python-list@python.org>
Message-ID: <5ih63mF3pvnt7U1@mid.individual.net>

Marshall T. Vandegrift wrote:
> I'm trying to write a decorator which allows one to produce simple
> coroutines by just writing a function as a generator expression
> which re-receives it's arguments as a tuple from each yield.  

May I ask why? Passing it the same arguments over and over is no
use; and there is the send method.

> The ugliness of the ArgPacker class makes me suspect that I should
> perhaps just manually create and track a generator when I need a
> function with generator-like properties.

What do you mean? I don't quite understand why you'd have to "track"
a generator for getting generator-like properties.

Regards,


Bj?rn

-- 
BOFH excuse #103:

operators on strike due to broken coffee machine



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  2 12:10:30 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 02 Aug 2007 18:10:30 +0200
Subject: Pythonic way for missing dict keys
In-Reply-To: <1i27mku.1sc8l3x1dda3crN%aleax@mac.com>
References: <mailman.938.1184958565.22759.python-list@python.org>
	<pan.2007.07.21.00.20.54.768439@REMOVE.THIS.cybersource.com.au>
	<mailman.954.1184989959.22759.python-list@python.org>
	<Xns99748CC2DB4AAduncanbooth@127.0.0.1>
	<1185041243.323915.161230@x40g2000prg.googlegroups.com>
	<mailman.984.1185101740.22759.python-list@python.org>
	<87lkd0eprj.fsf@pobox.com>
	<mailman.1279.1185623588.22759.python-list@python.org>
	<pan.2007.07.29.04.10.19.329342@REMOVE.THIS.cybersource.com.au>
	<46b0ed0b$0$2257$426a74cc@news.free.fr>
	<mailman.1493.1186042809.22759.python-list@python.org>
	<46b1b0ba$0$25340$426a74cc@news.free.fr>
	<1i27mku.1sc8l3x1dda3crN%aleax@mac.com>
Message-ID: <46b201f4$0$13464$426a74cc@news.free.fr>

Alex Martelli a ?crit :
> Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com>
> wrote:
> 
>> Alex Popescu a ?crit :
>>> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote in
>>> news:46b0ed0b$0$2257$426a74cc at news.free.fr: 
>> (snip)
>>>> if hasattr(obj, '__call__'):
>>>>    # it's a callable
>>>>
>>>> but I don't find it so Pythonic to have to check for a __magic__
>>>> method. 
>>> It looks like Python devs have decided it is Pythonic, because it is
>>> already in the PEP. 
>> I do know, and I disagree with this decision.
>>
>> FWIW, repr(obj) is mostly syntactic sugar for obj.__repr__(), 
>> getattr(obj, name) for obj.__getattr__(name), type(obj) for 
>> obj.__class__  etc... IOW, we do have a lot of builtin functions that
>> mostly encapsulate calls to __magic__ methods, and I definitively don't
>> understand why this specific one (=> callable(obj)) should disappear. I
> 
> Maybe because it DOESN'T "encapsulate a call" to a magic method, but
> rather the mere check for the presence of one?

Yes, true. But it doesn't make such a big difference IMHO : it's about 
decoupling API (the builtin funcs) from implementation (accessing | 
calling | checking for the presence of a given implementation attribute).

>> usually have lot of respect for Guido's talent as a language designer
>> (obviously since Python is still MFL), but I have to say I find this 
>> particular decision just plain stupid. Sorry.
> 
> The mere check of whether an object possesses some important special
> method is best accomplished through the abstract-base-classes machinery
> (new in Python 3.0: see <http://www.python.org/dev/peps/pep-3119/>).  At
> this time there is no Callable ABC, but you're welcome to argue for it
> on the python-3000 mailing list (please do check the archives and/or
> check privately with the PEP owner first to avoid duplication).

I'll have a look. Thanks for the pointers.


From jeremy+complangpython at jeremysanders.net  Fri Aug 10 07:24:45 2007
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Fri, 10 Aug 2007 12:24:45 +0100
Subject: Smoother Lines in Turtle Graphics
References: <1186703789.695265.52390@e9g2000prf.googlegroups.com>
	<5i2tnaF3mgsofU1@mid.uni-berlin.de>
	<1186744055.367994.61850@g12g2000prg.googlegroups.com>
Message-ID: <f9hhtt$jta$1@gemini.csx.cam.ac.uk>

Ant wrote:

> Python: Batteries and Turtles included!

I didn't know that! It looks like turtle is based on Tk, which doesn't have
antialiasing yet (see http://wiki.tcl.tk/10101 ), so it can't really be
made nice and smooth (unless you could somehow use tkzinc/tkpath to draw
with).

I suppose turtle wouldn't be that hard to reimplement it to use Qt/Gtk
instead.

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 31 05:10:28 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 31 Aug 2007 11:10:28 +0200
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188523589.736146.263510@l22g2000prc.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
Message-ID: <46d7daf4$0$6451$426a74cc@news.free.fr>

Russ a ?crit :
>> FWIW, the "Eiffel and SPARK Ada folks" also "brilliantly explained" why
>> one can not hope to "write reliable programs" without strict static
>> declarative type-checking.
> 
> And they are probably right.

And they are obviously wrong, by empiric experience.

> I don't think you understand what they mean by "reliable
> programs."

I think you should stop over-estimating yourself, and start realizing 
that there are quite a lot of experimented programmers here.

> The important question is this: why do I waste my time with bozos like
> you?

The same question is probably crossing the mind of quite a lot of people 
here - but the 'bozo' might not be who you think.



From rhauff at gmail.com  Fri Aug 31 14:11:58 2007
From: rhauff at gmail.com (gsxg)
Date: Fri, 31 Aug 2007 18:11:58 -0000
Subject: Is there a simple way to exit a while loop on keystroke?
In-Reply-To: <1188581623.588967.78050@z24g2000prh.googlegroups.com>
References: <1188578827.809840.90100@r29g2000hsg.googlegroups.com>
	<1188581623.588967.78050@z24g2000prh.googlegroups.com>
Message-ID: <1188583918.747640.300850@22g2000hsm.googlegroups.com>

Thanks,
The curses library doesn't look to helpful to me.  However using CTRL-
C is fine and is working nicely.

BTW, it should be "time.sleep(1)" in the example above, instead of
just
"sleep(1)"  (Just in case any other newbies like me read this)

Thanks again



From gherron at islandtraining.com  Tue Aug 21 12:09:13 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 21 Aug 2007 09:09:13 -0700
Subject: Python is removing my quotes!
In-Reply-To: <496954360708210900p6da42670o3a28d6b0dbd4c524@mail.gmail.com>
References: <496954360708210900p6da42670o3a28d6b0dbd4c524@mail.gmail.com>
Message-ID: <46CB0E29.2010306@islandtraining.com>

Robert Dailey wrote:
> Hi,
>
> Note: I'm using Python on Windows
>
> I have an application that allows a user to submit a password as a
> command line parameter. The password of choice may contain any
> characters the user wishes, including quotes. If I do the following:
>
> python password.py "9999"MyPassword
>
> The resulting output when I print this inside the script is:
>
> 9999MyPassword
>
> Notice how the quotations have been stripped. Is it DOS doing this, or
> Python? Is there a way I can fix it?
>
> Thanks.

Not Python.  It never even sees those quotes.  Whatever system you are
using for entering the text is stripping them.  Is it the command prompt
(cmd.exe)?  If so then you can escape the quote by preceding it with a
backslash.  (This is true of the DOS prompt and all the unix shells, and
their windows ports, that I know about.)

Gary Herron



From bdesth.quelquechose at free.quelquepart.fr  Thu Aug 30 09:35:06 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 30 Aug 2007 15:35:06 +0200
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188518054.298017.90610@x35g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
Message-ID: <46d76595$0$4013$426a74cc@news.free.fr>

Russ a ?crit :
> Bruno Desthuilliers wrote:
> 
>>Russ a ?crit :
>>
>>>On Aug 28, 10:58 pm, Michele Simionato <michele.simion... at gmail.com>
>>>wrote:
>>>
>>>
>>>
>>>>Why do you think that would ad a strong positive capability?
>>>>To me at least it seems a big fat lot of over-engineering, not
>>>>needed in 99% of programs. In the remaining 1%, it would still not
>>>>be needed since Python provides out of the box very powerful
>>>>metaprogramming capabilities so that you can implement
>>>>yourself the checks you need, if you really need them.
>>>
>>>
>>>I get the strong impression you don't really understand what
>>>programming by contract is.
>>
>>I get the strong impression you don't really understand how
>>condescending you are.
> 
> 
> When someone writes something as ignorant as that, they need to be
> called on it.

When someone writes something as arrogant as that, they need to be 
called on it.

Michele obviously knows what DbC is (probably better than you do), and 
he also knows Python enough to know why you don't need to add anything 
to Python to have it.

> So you can implement everything you need already in Python? 

Talking about DbC ?

> Yes, of
> course, 

"Yes, of course". A couple of decorator functions and you're done. It's 
pretty trivial, and that's why Michele told you could implement it by 
yourself.

(snip)

>>>I have not yet personally used it,
>>
>>You have no working experience with the concept, but you think it should
>>make it into Python's core ???
>  
> I don't need to use it to understand the concept. That has been
> explained
> brilliantly by the Eiffel and SPARK Ada folks.

FWIW, the "Eiffel and SPARK Ada folks" also "brilliantly explained" why 
one can not hope to "write reliable programs" without strict static 
declarative type-checking.

One needs to have working experience with a concept to know what it's 
really worth. Too bad for you, you're too "smart" to understand this.

> I am also smart enough 

Yes, obviously really smart.


From DustanGroups at gmail.com  Tue Aug 28 07:20:17 2007
From: DustanGroups at gmail.com (Dustan)
Date: Tue, 28 Aug 2007 11:20:17 -0000
Subject: an eval()-like exec()
In-Reply-To: <mailman.47.1188255992.28954.python-list@python.org>
References: <1188241165.418263.165730@k79g2000hse.googlegroups.com>
	<mailman.47.1188255992.28954.python-list@python.org>
Message-ID: <1188300017.844037.129590@19g2000hsx.googlegroups.com>

On Aug 27, 6:06 pm, "Matt McCredie" <mccre... at gmail.com> wrote:
> > A python interactive interpreter works by having the user type in some
> > code, compiling and running that code, then printing the results. For
> > printing, the results are turned into strings.
>
> > I would like make an interpreter which does this, without the last
> > part: i.e. where the results are returned as objects, instead of as
> > strings. I.e. have I would like to see something that behaves like
> > this:
>
> > >>> ip = MyInterpreter()
> > # this started a new interpreter
> > >>> ip.run("import math") is None
> > True
> > >>> ip.run("math.pi") is math.pi
> > True
>
> > Neither exec() or eval() is usable for this, as far as I see, because
> > eval can't handle arbitrary python code (eval("import math") ), and
> > exec() doesn't return the results.
>
> > Subclassing an code.InteractiveInterpreter or code.InteractiveConsole
> > seems like a usable idea, but I couldn't find out what to do to get
> > the results before they are turned into strings.
>
> > Using compile() and then eval() didn't seem usable either.
>
> > Any ideas?
>
> Well, my first thought is that exec and eval serve two different
> purposes, and you should just have both of them and use the
> appropriate one based on the situation. However, I think it is
> possible to enable the behavior you want:
>
> [code]
> def myeval(statement, globals_=None, locals_=None):
>     try:
>         return eval(statement, globals_, locals_)
>     except SyntaxError:
>         if locals_ is None:
>             import inspect
>             locals_ = inspect.currentframe().f_back.f_locals
>         exec statement in globals_, locals_
> [/code]
>
> It seems to work for me.
>
> Matt

Unless it's something like:

raise_(SyntaxError)

where raise_ is a function equivalent to the corresponding statement.



From f.guerrieri at gmail.com  Tue Aug 28 03:11:08 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Tue, 28 Aug 2007 09:11:08 +0200
Subject: How to free memory ( ie garbage collect) at run time with Python
	2.5.1(windows)
In-Reply-To: <fauspo$hda$00$2@news.t-online.com>
References: <1188224306.863247.127890@50g2000hsm.googlegroups.com>
	<1i3hujk.ulsjt32wqtq0N%aleax@mac.com>
	<faus7d$hda$00$1@news.t-online.com>
	<fauspo$hda$00$2@news.t-online.com>
Message-ID: <79b79e730708280011m7aa6a136m21ef149b0fbc9041@mail.gmail.com>

On 8/27/07, Peter Otten <__peter__ at web.de> wrote:
> Peter Otten wrote:
>
> > Alex Martelli wrote:
> >
> >> Integer objects that are once generated are kept around in a "free list"
> >> against the probability that they might be needed again in the future (a
> >
> > Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
> > [GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
> > Type "help", "copyright", "credits" or "license" for more information.
> >>>> x = 1000
> >>>> y = 1000
> >>>> x is y
> > False
> > Why don't x and y point to the same object then?
> > Peter
> Oops, I think I got it now. The actual objects are freed, only the memory is
> kept around for reuse with other ints...

On my (windows) machine, only integer up to 256 are cached...
I made two dictionaries with mapping from i to id(i) and then
compared. They were equal up to 256.
In short, try your example with 256 and 257 and see what happens :-)

francesco


From __peter__ at web.de  Thu Aug 16 13:42:37 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 16 Aug 2007 19:42:37 +0200
Subject: ploting issues in program
References: <1187250500.571837.196940@19g2000hsx.googlegroups.com>
	<fa10su$rf2$02$1@news.t-online.com>
	<mailman.2052.1187263908.22759.python-list@python.org>
Message-ID: <fa22ae$6n7$01$1@news.t-online.com>

Steve Holden wrote:

> I might ask just exactly what is being plotted to give those answers. It
> sounds like field strength, but I am having difficulty envisaging a
> field that is weakest at its center - is this some sort of alternative
> universe you are plotting :-) ?

I believe the OP is trying to plot a radiation pattern like Figure 4.5 on
the following page:

http://www.vias.org/wirelessnetw/wndw_06_05_05.html

Peter


From steve at holdenweb.com  Wed Aug  8 18:20:48 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Aug 2007 18:20:48 -0400
Subject: How to reset sys.exec_prefix?
In-Reply-To: <oUqui.48213$YL5.12358@newssvr29.news.prodigy.net>
References: <fPqui.2806$IE5.17@newssvr17.news.prodigy.net>
	<oUqui.48213$YL5.12358@newssvr29.news.prodigy.net>
Message-ID: <f9dfju$9k8$1@sea.gmane.org>

Bryan wrote:
> Bryan wrote:
>> Somehow on my linux box I scrood things up and I lost my python path info.
>>
>> If I check sys.exec_prefix or sys.prefix it shows '/usr/local/', where 
>> it should show '/usr/'.
>>
>> Is there a config file somewhere that I can change to fix this, or do I 
>> need to do a rebuild/reinstall?  Hope not.
>>
>> Thanks,
>> B
> 
> Actually to clarify a bit here's what I see:
> 
>  >>> sys.prefix
> '/usr/local'
>  >>> sys.path
> ['', '/usr/local/lib/python25.zip', '/usr/local/lib/python2.5', 
> '/usr/local/lib/python2.5/plat-linux2', 
> '/usr/local/lib/python2.5/lib-tk', 
> '/usr/local/lib/python2.5/lib-dynload', 
> '/usr/local/lib/python2.5/site-packages', 
> '/usr/local/lib/python2.5/site-packages/PIL']
> 
> I am thinking that the prefix is prepended to all the paths.
> 
> All my stuff lives in 'usr/lib/python2.5', so I was hoping by just 
> changing my prefix it would set the rest of the paths accordingly.
> 
It looks like you've installed a local copy. By default, I seem to 
remember, Python installs with a prefix of /usr/local, so if you have 
/usr/local/bin on your PATH variable you will pick up a local copy in 
preference to the standard version installed with the OS.

Try running

   /usr/bin/python

and see if that original one is still there (which it probably will be). 
Id so, all you need to do is uninstall the local version and things will 
magically return to normal.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From nagle at animats.com  Thu Aug 16 11:40:15 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 16 Aug 2007 15:40:15 GMT
Subject: Who told str() to round my int()'s!!!
In-Reply-To: <slrnfc7sot.1aa.hat@se-162.se.wtb.tue.nl>
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
	<9qmvi.47364$s5.1537219@phobos.telenet-ops.be>
	<mailman.1857.1186861157.22759.python-list@python.org>
	<3ZudnUuJ68lcxl7bnZ2dnUVZ_t_inZ2d@comcast.com>
	<slrnfc7sot.1aa.hat@se-162.se.wtb.tue.nl>
Message-ID: <zd_wi.14608$eY.8264@newssvr13.news.prodigy.net>

A.T.Hofkamp wrote:
> On 2007-08-15, Larry Bates <larry.bates at websafe.com> wrote:
> 
>>or the mildy
>>amusing "how do I write bytes not characters to a file" questions at least once
>>a week on this forum.

    Actually, that's a reasonable question, and one that Python didn't do
quite right.

    Remember, in the beginning, Python had only ASCII strings, which
were equivalent to arrays of bytes.  Then came Unicode strings.  Then
came the restriction of ASCII chars to 0..127.  Except that you can
still store binary bytes in ASCII strings, subject to some limitations.

    The next logical step is a complete separation of binary data handling
from text string handling, probably using some type in "numarray" for
arrays of bytes.

					John Nagle


From bj_666 at gmx.net  Wed Aug  1 05:18:03 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 1 Aug 2007 09:18:03 GMT
Subject: access the name of my method inside it
References: <1185959202.302467.276080@x35g2000prf.googlegroups.com>
Message-ID: <5hb1ebF3inuf2U6@mid.uni-berlin.de>

On Wed, 01 Aug 2007 09:06:42 +0000, james_027 wrote:

> for example I have this method
> 
> def my_method():
>     # do something
> 
>     # how do I get the name of this method which is my_method here?

Why do you need this?  There are ways but those are not really good for
production code.

Ciao,
	Marc 'BlackJack' Rintsch


From steve at holdenweb.com  Fri Aug 31 21:45:01 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 21:45:01 -0400
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <38rmq4-cq.ln1@strongwill.g2ctech>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>	<1188364909.397692.209170@q4g2000prc.googlegroups.com>	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>	<1188369928.755777.142690@i38g2000prf.googlegroups.com>	<46d75191$0$401$426a74cc@news.free.fr>	<1188518054.298017.90610@x35g2000prf.googlegroups.com>	<46d76595$0$4013$426a74cc@news.free.fr>	<1188523589.736146.263510@l22g2000prc.googlegroups.com>	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>	<7xwsvcc9yz.fsf@ruckus.brouhaha.com>	<1i3p8lm.19738kn1q0gkouN%aleax@mac.com>	<1188587846.687895.69240@q5g2000prf.googlegroups.com>
	<38rmq4-cq.ln1@strongwill.g2ctech>
Message-ID: <fbag70$vfc$1@sea.gmane.org>

Jorge Godoy wrote:
> Russ wrote:
> 
>> Alex, I think you are missing the point. Yes, I'm sure that web
>> searches are critical to
>> Google's mission and commercial success. But the point is that a few
>> subtle bugs cannot
>> destroy Google. If your search engines and associated systems have
>> bugs, you fix them
>> (or simply tolerate them) and continue on. And if a user does not get
>> the results he wants,
>> he isn't likely to die over it -- or even care much.
> 
> But if this pattern of not getting wanted results is common, then the user
> will migrate to alternative search engines and this will *kill* the
> business.  Wrong results won't impact ONE search, but many will impact the
> company business and will be part of the recipe to take it out of business. 
> 
>> Online financial transactions are another matter altogether, of
>> course. User won't die, but
>> they will get very irate if they lose money. But I don't think that's
>> what you are talking about
>> here.
> 
> Lets make someone loose his job and have all his money commitments
> compromised because of this money lost and we might be talking about people
> taking their lives.
> 
> Again, this isn't 100% sure to happen, but it *can* happen.  
> 
> As it happens with a peacemaker: the user won't die if his heart skips one
> beat, but start skipping a series of them and you're incurring in serious
> problems.
> 
> Just because the result isn't immediate it doesn't mean it isn't critical.
> 
> 
We probably need to distinguish between "mission-critical", where a 
program has to work reliably for an organization to meet its goals, and 
"safety-critical" where people die or get hurt if the program misbehaves.

The latter are the ones where you need to employ all possible techniques 
to avoid all possible failure modes.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From mail at microcorp.co.za  Thu Aug 23 03:09:02 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 23 Aug 2007 09:09:02 +0200
Subject: How would I go about making a file open. Not the way you might
	think.
References: <eb79828c0708221959t18dd4024m251c1eac7732ec1f@mail.gmail.com>
Message-ID: <010101c7e555$49577e00$03000080@hendrik>


Lamonte Harris  wrote:

>Basically you can open a file by double clicking, and by default it would open
w/ what every program you have it set >to.  Most text files would open in
notepad.  How can I make a txt open so that notepad opens w/ the content in it
by >using just python.

I asked this question just yesterday - and Tim Golden answered:

os.startfile()

- Hendrik



From phil at riverbankcomputing.co.uk  Sun Aug  5 13:38:12 2007
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sun, 5 Aug 2007 18:38:12 +0100
Subject: PyQt v4.3 (Python Bindings for Qt) Released
Message-ID: <200708051838.12519.phil@riverbankcomputing.co.uk>

Riverbank Computing is pleased to announce the release of PyQt v4.3 available 
from http://www.riverbankcomputing.co.uk/pyqt/.

The highlights of this release include:

- Full support for Qt v4.3.0.
- Partial functions can be used as slots.
- Many Qt classes now support the standard Python pickle protocol for data
  serialisation.

PyQt is a comprehensive set of Qt bindings for the Python programming language 
and supports the same platforms as Qt (Windows, Linux and MacOS/X).  Like Qt, 
PyQt is available under the GPL and a commercial license.

See http://www.riverbankcomputing.com/Docs/PyQt4/html/classes.html for the 
class documentation.

PyQt v4 supports Qt v4 (http://www.trolltech.com/products/qt/index.html).  
PyQt v3 is still available to support earlier versions of Qt.

PyQt v4 is implemented as a set of 11 extension modules containing 
approximately 400 classes and 6,000 functions and methods.

    QtCore
    The non-GUI infrastructure including event loops, threads, i18n, Unicode,
    signals and slots, user and application settings.

    QtGui
    A rich collection of GUI widgets.

    QtNetwork
    A set of classes to support TCP and UDP socket programming and higher
    level protocols (eg. HTTP, SSL).

    QtOpenGL
    A set of classes that allows PyOpenGL to render onto Qt widgets.

    QtScript
    A set of classes that implements a JavaScript interpreter.

    QtSql
    A set of classes that implement SQL data models and interfaces to industry
    standard databases.  Includes an implementation of SQLite.

    QtSvg
    A set of classes to render SVG files onto Qt widgets.

    QtTest
    A set of classes to automate unit testing of PyQt applications and GUIs.

    QtXML
    A set of classes that implement DOM and SAX parsers.

    QtAssistant
    A set of classes that enables the Qt Assistant online help browser to be
    integrated with an application.

    QAxContainer
    A set of classes for Windows that allows the integration of ActiveX
    controls and COM objects.

A Windows installer is provided for the GPL version of PyQt which contains 
everything needed for PyQt development (including Qt, Qwt, QScintilla and the 
eric IDE).

PyQt includes the pyuic4 utility which generates Python code to implement user 
interfaces created with Qt Designer in the same way that the uic utility 
generates C++ code.  It is also able to load Designer XML files dynamically.


From ldo at geek-central.gen.new_zealand  Fri Aug 31 23:37:19 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 15:37:19 +1200
Subject: So what exactly is a complex number?
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<46d89ba9$0$30380$9b4e6d93@newsspool4.arcor-online.net>
Message-ID: <fbamkq$r7q$5@lust.ihug.co.nz>

In message <46d89ba9$0$30380$9b4e6d93 at newsspool4.arcor-online.net>, Wildemar
Wildenburger wrote:

> Tim Daneliuk wrote:
>> 
>> One of the most common uses for Complex Numbers is in what are
>> called "vectors".  In a vector, you have both an amount and
>> a *direction*.  For example, I can say, "I threw 23 apples in the air
>> at a 45 degree angle".  Complex Numbers let us encode both
>> the magnitude (23) and the direction (45 degrees) as a "number".
>> 
> 1. Thats the most creative use for complex numbers I've ever seen. Or
> put differently: That's not what you would normally use complex numbers
> for.

But that's how they're used in AC circuit theory, as a common example.


From thermostat at gmail.com  Wed Aug 29 15:51:41 2007
From: thermostat at gmail.com (Dan)
Date: Wed, 29 Aug 2007 19:51:41 -0000
Subject: re compiled object result caching?
Message-ID: <1188417101.936530.182480@50g2000hsm.googlegroups.com>


I find myself often using regular expressions in the following
pattern:

foo_re = re.compile(r"foo(bar)")
# . . .
re_result = foo_re.search(line)
if re_result:
    bar = re_result.group(1)
    # . . .

But, I keep thinking this is awkward, and I would kind of like to have
the re object to cache its result; along the lines of:

foo_re = re.compile(r"foo(bar)")
# . . .
if foo_re.search(line):
    foo_re.last_result().group(1)

I realize I could do this with a wrapper object (I'm not sure if I can
subclass the re object..), but I was wondering what the community
thought of this. Good idea? Bad? Would it be difficult to add to the
standard re module? The only real downside I can think of is thread
safety. The other practical benefit I can think of is situations like
the following:

if unlikely_condition and foo_re.search(line):
   # . . .

With the current implementation I think you would either have to do
the search even if unlikely_condition is False, or you would have to
do an annoying nested if. Is there another way to achieve this that
I'm not thinking of?

-Dan



From pepper at rumbalski.com  Tue Aug 21 14:07:11 2007
From: pepper at rumbalski.com (pepper at rumbalski.com)
Date: Tue, 21 Aug 2007 11:07:11 -0700
Subject: confused about why i get a type error when i call an object's method
Message-ID: <1187719631.092657.158410@d55g2000hsg.googlegroups.com>

I'm confused about why i get a type error when i call an object's
method.  Here's the example code:
>>> class Foo:
	def __init__(self):
		self.foo = []
	def foo(self):
		print "in foo!"


>>> f = Foo()
>>> dir(f)
['__doc__', '__init__', '__module__', 'foo']
>>> f.foo()

Traceback (most recent call last):
  File "<pyshell#32>", line 1, in <module>
    f.foo()
TypeError: 'list' object is not callable
>>>



From gigs at hi.t-com.hr  Wed Aug 29 15:18:01 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Wed, 29 Aug 2007 21:18:01 +0200
Subject: cgi
In-Reply-To: <46d5c01b$0$36438$4fafbaef@reader5.news.tin.it>
References: <fb4a57$ojf$1@ss408.t-com.hr>
	<46d5c01b$0$36438$4fafbaef@reader5.news.tin.it>
Message-ID: <fb4gpa$bb0$1@ss408.t-com.hr>

Fabio Z Tessitore wrote:
> Il Wed, 29 Aug 2007 19:24:54 +0200, Gigs_ ha scritto:
> 
>> i have simple page and form that ask for name and color and cgi script
>> that print that name in another page and background in chosen color
>>
>> all the time this error pop:
>> Error response
>>
>> Error code 501.
>>
>> Message: Can only POST to CGI scripts.
>>
> 
> I think this should be your problem,
> 
> change GET with POST in the form
> 
> bye
it is post in form.


From lists at liquidtrust.org  Thu Aug 23 17:11:48 2007
From: lists at liquidtrust.org (Charlie)
Date: Thu, 23 Aug 2007 15:11:48 -0600
Subject: How would I compile a Python file to a exe
In-Reply-To: <eb79828c0708231355o72f9b200g74036aca19f1806c@mail.gmail.com>
References: <eb79828c0708231355o72f9b200g74036aca19f1806c@mail.gmail.com>
Message-ID: <20070823151148.1ahhvo6ha8gowgow@mail.liquidtrust.org>

Quoting Lamonte Harris <pyth0nc0d3r at gmail.com>:

> Been a while and I'm wondering how I would go about doing it.
>

py2exe seems to be a fairly good option for this, at least in the  
world of Windows.



From bjourne at gmail.com  Fri Aug 31 10:19:53 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Fri, 31 Aug 2007 16:19:53 +0200
Subject: list index()
In-Reply-To: <1188474616.3257.18.camel@localhost.localdomain>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<1188474616.3257.18.camel@localhost.localdomain>
Message-ID: <740c3aec0708310719r5493fa57i21b31b237b7e63a7@mail.gmail.com>

On 8/30/07, Carsten Haese <carsten at uniqsys.com> wrote:
> Is the Pythonic way
>
> try:
>     i = somelist.index(thing)
>     # Do something with i
> except IndexError:
>     # Do something if thing not found

That is not the Pythonic way. "# Do something with i" might also raise
an IndexError and they you are screwed. The Pythonic way is something
like:

try:
    i = somelist.index(thing)
except IndexError:
    print "Oh noes!"
else:
    # Do the thing with i

And for many cases this actually is worse/less readable than the
alternative would have been if list.index() returned -1.


-- 
mvh Bj?rn


From steve at holdenweb.com  Sun Aug 12 11:23:26 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Aug 2007 11:23:26 -0400
Subject: Puzzled by "is"
In-Reply-To: <d71c7ed60708120626y6d9a9edcnf007a5273de125cc@mail.gmail.com>
References: <20070809194105.39BD11E400A@bag.python.org>	<f9frbl$dps$1@sea.gmane.org>	<mailman.1814.1186692638.22759.python-list@python.org>	<87zm1042f0.fsf@benfinney.id.au>	<mailman.1839.1186768658.22759.python-list@python.org>	<87ir7l5bv4.fsf@benfinney.id.au>
	<d71c7ed60708120626y6d9a9edcnf007a5273de125cc@mail.gmail.com>
Message-ID: <f9n8lb$cg9$1@sea.gmane.org>

Dick Moores wrote:
> On 8/12/07, *Ben Finney* <bignose+hates-spam at benfinney.id.au 
> <mailto:bignose+hates-spam at benfinney.id.au>> wrote:
> 
>     Dick Moores <rdm at rcblue.com <mailto:rdm at rcblue.com>> writes:
> 
>      > At 06:13 PM 8/9/2007, Ben Finney wrote:
>      > >it's entirely left to the language implementation which
>      > >optimisation trade-offs to make, and the language user (that's you
>      > >and I) should *not* expect any particular behaviour to hold between
>      > >different implementations.
>      >
>      > I'm not clear on the meaning of "implementations" here.  Would 2.5
>      > for Windows, Mac, Linux all be different implementations? Would Iron
>      > Python be another? ActivePython?
> 
>     For the purpose of the above statement, you should consider even the
>     same Python on two different machines to be "different
>     implementations". As a programmer writing Python code, you should not
>     expect any "implementation-dependent" behaviour to operate in any
>     particular way.
> 
> 
> So would a programmer EVER use "is" in a script?

Sure. For example, the canonical test for None uses

     x is None

because there is only ever one instance of type Nonetype, so it's the 
fastest test. Generally speaking you use "is" to test for identity (do 
these two expressions reference the same object) rather than equality 
(do these two expressions evaluate to equivalent objects).

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From kyosohma at gmail.com  Thu Aug 23 09:14:13 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 23 Aug 2007 06:14:13 -0700
Subject: Question: wxpython and 3d engine example with model load ?
In-Reply-To: <1187860306.533382.248430@j4g2000prf.googlegroups.com>
References: <1187860306.533382.248430@j4g2000prf.googlegroups.com>
Message-ID: <1187874853.965182.133630@e9g2000prf.googlegroups.com>

On Aug 23, 4:11 am, OpenPavilion <BerndW... at googlemail.com> wrote:
> Hello,
>
> did anyone succeed in combining wxpython and a 3d engine (pyogre,
> crystalblend, panda3d, soya etc.) ?
>
> I would like to create an application, which uses wxpython tree, menu
> and grid elements and embedds a 3d view of some of the listed objects
> in an own detail window, so showing the object as a 3d model.
> I know there is PyOpenGL as well, but I need to load complete models
> (meshes done with cinema4d or blender) into the 3d view.
>
> So it would be very nice, if someone could post me a link to an
> example, where someone has successfully glued wxpython UI and a 3d
> engine view loading meshes into the 3d view.
>
> Regards
> Bernd

I recommend that you post this question to the wxPython group. If it's
been done, they should know.
http://www.wxpython.org/maillist.php

Mike



From mhearne808 at gmail.com  Thu Aug 30 18:19:37 2007
From: mhearne808 at gmail.com (mhearne808[insert-at-sign-here]gmail[insert-dot-here]com)
Date: Thu, 30 Aug 2007 15:19:37 -0700
Subject: fcntl problems
Message-ID: <1188512377.441241.107900@q4g2000prc.googlegroups.com>

I'm having a number of problems with the fcntl module.  First off, my
system info:

Mac OS X
Darwin igskcicglthearn.cr.usgs.gov 8.10.1 Darwin Kernel Version
8.10.1: Wed May 23 16:33:00 PDT 2007; root:xnu-792.22.5~1/RELEASE_I386
i386 i386
Python 2.5.1 (built from source)

OK, the weirdness:

First of all, if I try this:
file = open("counter.txt","w+")
fcntl.flock(file.fileno(), fcntl.LOCK_NB)

I get this:
---------------------------------------------------------------------------
<type 'exceptions.IOError'>               Traceback (most recent call
last)
/Users/mhearne/src/python/<ipython console> in <module>()
<type 'exceptions.IOError'>: [Errno 9] Bad file descriptor

However, if I try this:
fcntl.flock(file.fileno(), fcntl.LOCK_EX)

I get no errors.

Proceeding forward with the locked file, let's say I do the above in
Python interactive Process A.  Then in python interactive Process B, I
repeat the "open" function on the same file with the same
permissions.  Then, in each process, I write some text to the file
using the write() method.  After closing the file in both processes,
the only text I see in the file is from Process B!

According to my Python Cookbook:
"Exclusive lock: This denies all _other_ processes both read and write
access to the file."

I seem to be experiencing the reverse of that description.  Is this my
lack of understanding, or have I discovered a bug?

Thanks,

Mike



From antroy at gmail.com  Tue Aug 21 05:27:17 2007
From: antroy at gmail.com (Ant)
Date: Tue, 21 Aug 2007 02:27:17 -0700
Subject: The folder a script is executed in
In-Reply-To: <1187687436.476773.276550@22g2000hsm.googlegroups.com>
References: <1187687436.476773.276550@22g2000hsm.googlegroups.com>
Message-ID: <1187688437.358293.322460@22g2000hsm.googlegroups.com>

On Aug 21, 10:10 am, aine_ca... at yahoo.com wrote:
...
> myLocation = GetMyLocation()
> print myLocation
>
> >> C:/folder

Do you mean the folder containing the script? Or the current working
directory?

If the former, then look at os.path.split(sys.argv[0])[0]
If the latter, try something like: os.path.abspath(os.curdir)

--
Ant...

http://antroy.blogspot.com/




From ladaan at iptel.org  Thu Aug 23 13:25:03 2007
From: ladaan at iptel.org (Ladislav Andel)
Date: Thu, 23 Aug 2007 19:25:03 +0200
Subject: comparing two lists
In-Reply-To: <1187888594.076531.163410@l22g2000prc.googlegroups.com>
References: <mailman.180.1187886381.32294.python-list@python.org>
	<1187888594.076531.163410@l22g2000prc.googlegroups.com>
Message-ID: <46CDC2EF.9030702@iptel.org>

kyosohma at gmail.com wrote:
> On Aug 23, 11:27 am, Ladislav Andel <lad... at iptel.org> wrote:
>   
>> Hi,
>> what would be the most efficient way to do following?
>>
>> I have a list of dictionaries  taken from DB e.g.
>> dblist = [{'id:1, 'host':'google.com','ip_address':'1.2.3.4'},
>> {'id:3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
>> {'id:9, 'host':'msn.com','ip_address':'11.3.2.3'}]
>>
>> and list of object instances in memory(it's just for example)
>> which are looping within itself and testing particular hosts
>>
>> memlist = [<instance 1>,<instance 2>]
>> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
>> memlist[1].id  is 9 and  memlist[1].host is msn.com etc.
>>
>> Now I want to add a new instance to memlist since id=3(in dblist) is not
>> in memlist.
>> How would you iterate through it and insert a new instance?
>>
>> The result should be:
>> memlist = [<instance 1>,<instance 2>, <instance 3>]
>> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
>> memlist[1].id  is 3 and  memlist[1].host is yahoo.com etc.
>> memlist[2].id  is 9 and  memlist[2].host is msn.com etc.
>>
>> Furthermore, I can have the opposite situation.
>> This time I need to remove from memlist a host which is not in dblist.
>> How would you do this?
>>
>> The way how it works is that DBlist is loaded every 10 minutes and
>> compares with memlist.
>> The memlist should be the same as dblist.
>>
>> Could you help me, please?
>> I'm working on my version of this but somebody might be quicker than me.
>> In case I have it done I will post it.
>>
>> Thanks,
>> Lada
>>
>> There is
>>
>> and wt
>>     
>
> On lists that change in memory, I use the following looping structure:
>
> for i in range(len(in_memory_list)-1,-1,-1)
>
>   
well, actually I will need to iterate over 2 sequences which are not the 
same length
and synchronize it against the dblist i have.
But I will look at your post. Thanks a lot.

Lada
> This loops over the list backwards. I found this method here:
> http://mail.python.org/pipermail/python-list/1999-September/012451.html
>
> Hopefully this will fulfill your needs. I've used it to great effect!
>
> Mike
>
>   



From roman.yakovenko at gmail.com  Sun Aug 26 02:21:41 2007
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Sun, 26 Aug 2007 09:21:41 +0300
Subject: Any python Module for generating DocBook?
In-Reply-To: <C15CC70F-4403-4F08-80EC-9A9EEB549C50@comhem.se>
References: <C15CC70F-4403-4F08-80EC-9A9EEB549C50@comhem.se>
Message-ID: <7465b6170708252321n13757d50l6b996345049e7a27@mail.gmail.com>

On 8/25/07, Tommy Nordgren <tommy.nordgren at comhem.se> wrote:
> Do anyone on this list know of a Python module for generating DocBook
> programlisting elements for programming language source code
> merked with special comments.
> I want to write a programming book, and want to mark significant
> lines in the
> source code for reference. My DocBook processing software xmlint,
> xsltproc, and fop,
> don't support numbering lines, when including source files via
> <xi:include parse="text" ...

May be you should evaluate quickbook & boostbook (
http://boost-consulting.com/boost/tools/quickbook/doc/html/index.html
)
It is not exactly what you want but still worse to try.

-- 
Roman Yakovenko
C++ Python language binding
http://www.language-binding.net/


From robin at NOSPAMreportlab.com  Tue Aug 14 04:04:07 2007
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Tue, 14 Aug 2007 09:04:07 +0100
Subject: about negative polar plots not defined in python not even matlab
In-Reply-To: <1187076816.432607.7960@d55g2000hsg.googlegroups.com>
References: <1187076816.432607.7960@d55g2000hsg.googlegroups.com>
Message-ID: <46C161F7.40900@jessikat.plus.net>

.........
> polar(power,theta)
> title.....?
> how can i show the step on the polar plot  plot(-40, -30,-20,-10,0)
> 

I think you need to consider why you want to plot negative values. The 
decibel scales are actually logarithmic ie all power is actually 
positive. Zero power corresponds to -infinity.

In practice, I think your radiation pattern plot might correspond to 
gain (or attenuation). Just relabel your plot and change the values to 
positive. If you do that and the plots look familiar then you have an 
answer.
-- 
Robin Becker


From richardjones at optushome.com.au  Sun Aug 26 17:46:45 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Mon, 27 Aug 2007 07:46:45 +1000
Subject: New UI Toolkit
References: <1188146822.129605.160560@22g2000hsm.googlegroups.com>
Message-ID: <46d1f4c5$0$15276$afc38c87@news.optusnet.com.au>

Gerdus van Zyl wrote:
> I am halfway to a first release of a new GUI library for python. It
> will be cross platform and follows the Swing philosophy of user
> experience and interface fidelity above "but it doesn't look like
> windows!" (aside: neither does office 2007 or windowsmediaplayer).
> 
> The library is built on top of CairoGraphics (cairographics.org) and
> currently has a rather stable backend for Win32 and experimental
> backends for GTK,Pyglet,pygame.

I am also developing a gui toolkit (for somewhat similar reasons to you,
though unrelated to Swing) but it's for pyglet only. If you're interested,
you can find it in the pyglet SVN under contrib/wydget. It's under heavy
development and is fairly advanced (in terms of widgets, layouts, dialogs
etc implemented) already.


> Please reply and let your thoughts be known. Is there a need for a new
> GUI library for python?

Clearly you felt there was :)


    Richard



From wildemar at freakmail.de  Wed Aug 15 08:09:53 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Wed, 15 Aug 2007 14:09:53 +0200
Subject: Combinatorial of elements in Python?
In-Reply-To: <9e2f512b0708142203m782b0e10s817fb4d061ba0e46@mail.gmail.com>
References: <9e2f512b0708142203m782b0e10s817fb4d061ba0e46@mail.gmail.com>
Message-ID: <46C2ED11.70904@freakmail.de>

Sebastian Bassi wrote:
> I have 2 (or more) groups of elements, and I want to get all possible
> unique combinations from all of them. Is there a build-in method to do
> it?
>
> ADictionary={"one":["A","B","C","D"],"two":["H","I"]}
>
> I want to have all possible combinations from "one" and "two", that is:
>
> AH
> BI
> CH
> DI
> AI
> BH
> CI
> DH
>
> Sounds easy, but is not :)
>
>   
Oh but it is:

>>> ADictionary={"one":["A","B","C","D"],"two":["H","I"]}
>>> result = set()
>>> for one in ADictionary["one"]:
...     for two in ADictionary["two"]:
...         result.add(one + two)
... 
>>> result
set(['CI', 'CH', 'DH', 'DI', 'AI', 'AH', 'BH', 'BI'])


/W



From kyosohma at gmail.com  Sun Aug 12 21:03:18 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 13 Aug 2007 01:03:18 -0000
Subject: C++ Runtime Library error message - Pythonwin?
In-Reply-To: <1186872506.132154.61610@x35g2000prf.googlegroups.com>
References: <1186872506.132154.61610@x35g2000prf.googlegroups.com>
Message-ID: <1186966998.758238.46810@q3g2000prf.googlegroups.com>

On Aug 11, 5:48 pm, goldtech <goldt... at worldpost.com> wrote:
> Hi,
>
> Doing GIS [Geographic Information Systems] scripts.
>
> I was running a batch clip script that worked OK for 126 iterations
>  then I got the following message:
>
> "Microsoft Visual C++ Runtime Library
>
> program: C:\python21\pythonwin\pythonwin.exe
>
> This application has requested the runtime to terminate in an unusual
>  way. Please contact the applications support team for more
> information."
>
> What does this mean? Using XP. Is there a log on my system that gives
> more info?
>
> Thanks

Dunno. You should redirect the stdout/stderr to a log file and stick
some informative print statements in your code. Then when it crashes,
you might be able to track this down.

Mike



From kyosohma at gmail.com  Thu Aug 23 16:53:37 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 23 Aug 2007 13:53:37 -0700
Subject: How would I go about making a file open. Not the way you might
	think.
In-Reply-To: <ntSdnapifutBbFDbnZ2dnUVZ_tWtnZ2d@comcast.com>
References: <eb79828c0708221959t18dd4024m251c1eac7732ec1f@mail.gmail.com>
	<mailman.159.1187857019.32294.python-list@python.org>
	<ntSdnapifutBbFDbnZ2dnUVZ_tWtnZ2d@comcast.com>
Message-ID: <1187902417.718046.105910@z24g2000prh.googlegroups.com>

On Aug 23, 3:45 pm, Larry Bates <larry.ba... at websafe.com> wrote:
> Hendrik van Rooyen wrote:
> > Lamonte Harris  wrote:
>
> >> Basically you can open a file by double clicking, and by default it would open
> > w/ what every program you have it set >to.  Most text files would open in
> > notepad.  How can I make a txt open so that notepad opens w/ the content in it
> > by >using just python.
>
> > I asked this question just yesterday - and Tim Golden answered:
>
> > os.startfile()
>
> > - Hendrik
>
> Actually os.startfile('filename.txt') will open the file with whatever
> application is associated with .txt files on that machine.  That could be
> different from notepad if the user has chosen to override the defaults.
>
> os.system('notepad.exe c:\\junk.txt')
>
> will force notepad.exe to load and it will load the file specified.
>
> All depends on what you want to do.
>
> -Larry

That's true, but technically you should use the subprocess.Popen
module with Shell=True rather than the os.system method. At least, in
the newer Python versions, that seems to be the recommendation.

Mike



From steve at holdenweb.com  Wed Aug 22 00:35:17 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 22 Aug 2007 00:35:17 -0400
Subject: Chaining programs with pipe
In-Reply-To: <13cnbi87neru8c3@corp.supernews.com>
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
	<13cnbi87neru8c3@corp.supernews.com>
Message-ID: <fagedt$gpb$2@sea.gmane.org>

Grant Edwards wrote:
> On 2007-08-21, avishay <avishorp at yahoo.com> wrote:
> 
>> I'm trying to chain two programs with a pipe (the output of
>> one feeding the input of the other). I managed to capture the
>> output and feeding the input of each program independently
>> with popen, but how do I tie them together?
> 
> On Unix, you do the same thing you would in C. Create a pipe
> using os.pipe(), then run one program with stdout connected to
> the "write" end of the pipe and the other program with stdin
> connected to the "read" end of the pipe.
> 
> Or you can take a bit of a shortcut by letting the subprocess
> module create the pipe for you:
> 
> http://docs.python.org/lib/node536.html
> 
>> Is there a solution that works equally on all platforms?
> 
> The doc page for subprocess doesn't say what platforms support
> it.  I've had a lot of problems trying to use the subprocess
> module on windows.  As is typical for Windows, there are all
> sorts of special cases that either don't work at all or don't
> work the way they should. You pays your money and you takes
> your chances.
> 
Grant:

I will shortly have to write some training material on using subprocess 
under Windows, so if you have any pointers to where your accumulated 
knowledge can be gleaned I would be grateful for the time saving.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From stephane.larouche at polymtl.ca  Mon Aug 13 11:36:20 2007
From: stephane.larouche at polymtl.ca (=?utf-8?b?U3TDqXBoYW5l?= Larouche)
Date: Mon, 13 Aug 2007 15:36:20 +0000 (UTC)
Subject: Mixing Python and C threads
References: <mailman.412.1183729810.22759.python-list@python.org>
	<mailman.417.1183744293.22759.python-list@python.org>
	<f6o5fl$n7u$1@panix3.panix.com>
	<mailman.430.1183825935.22759.python-list@python.org>
	<f6ojgc$dm6$1@panix3.panix.com>
Message-ID: <loom.20070813T172835-944@post.gmane.org>

Aahz <aahz <at> pythoncraft.com> writes:

> 
> In article <mailman.430.1183825935.22759.python-list <at> python.org>,
> =?utf-8?b?U3TDqXBoYW5l?= Larouche  <stephane.larouche <at> polymtl.ca> wrote:
> >Aahz <aahz <at> pythoncraft.com> writes:
> >>
> >> Can you reproduce your problem with stub code that only creates threads?
> >> If yes, that indicates that you're messing with a thread structure
> >> somewhere.  Note that because you're using gcc, it's possible there's a
> >> thread bug on Windows with your tool chain.  You might want to check for
> >> bug reports.
> >
> >Here's the simplest piece of code I could think of to reproduce the problem:
> 
> Good work.  This is about as far as my expertise can take you; if nobody
> responds, you might try the new C/API mailing list (capi-sig).

If anybody followed this thread, you'll be pleased to know that the mingw gcc
4.2.1 "technology preview" release available from the official mingw website and
Python threads interact perfectly well together. You also have to pass the
-mthread option to the linker.

Sincerely,

St?phane




From antroy at gmail.com  Fri Aug 10 08:38:48 2007
From: antroy at gmail.com (Ant)
Date: Fri, 10 Aug 2007 12:38:48 -0000
Subject: py2exe with python 2.5
In-Reply-To: <1186742871.144805.163450@q4g2000prc.googlegroups.com>
References: <1186731595.139576.107660@e9g2000prf.googlegroups.com>
	<1186736574.092633.196100@d30g2000prg.googlegroups.com>
	<1186742871.144805.163450@q4g2000prc.googlegroups.com>
Message-ID: <1186749528.645498.27440@i13g2000prf.googlegroups.com>

On Aug 10, 11:47 am, vedrandeko... at v-programs.com wrote:
> On 10 kol, 11:02, Ant <ant... at gmail.com> wrote:
...
> yes,Python 2.5 is on the path, but how can I remove panda3d from that
> path?

Hit Win - Break to bring up the System Properties dialog (you can also
get here through the Control Panel).

Go to the Advanced tab, and click the "Environment Variables" button.
Find the PATH variable in one of the two lists, and edit it. Just
remove the Panda3D entry.

Note you'll have to restart your console to pick up any changes.

--
Ant...

http://antroy.blogspot.com/




From kyosohma at gmail.com  Fri Aug 31 09:46:25 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 31 Aug 2007 06:46:25 -0700
Subject: How to use "Resource Editor" in wxPython ?
In-Reply-To: <1188564589.573864.86980@x40g2000prg.googlegroups.com>
References: <1188564589.573864.86980@x40g2000prg.googlegroups.com>
Message-ID: <1188567985.942023.83540@o80g2000hse.googlegroups.com>

On Aug 31, 7:49 am, codemania <codema... at gmail.com> wrote:
> Disappointing me extremely, with the "generate python" function within
> Resource Editor, I only get a segment of python code which load
> xrc(xml format) file, rather than real python code in which I could
> append my own code.
>
> Does that mean RE(Resource Editor) is of little use?
>
> I hope not, maybe the way I use it is wrong? Tell me please.

You can use the code generated with your wxPython code; but when using
XRCed, you need to do two-stage creation, which the generated code
mentions. It even provides a link: http://wiki.wxpython.org/index.cgi/TwoStageCreation

I thought this one was good reading too:
http://wiki.wxpython.org/index.cgi/UsingXmlResources

I like it depending on the complexity of the project. It can seriously
reduce GUI code clutter.

Mike



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Aug 17 15:25:43 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 17 Aug 2007 21:25:43 +0200
Subject: Can python threads take advantage of use dual core ?
References: <1187366443.621295.97020@e9g2000prf.googlegroups.com>
Message-ID: <5imb1lF3pdisdU1@mid.individual.net>

nikhilketkar wrote:

> What are the implications of the Global Interpreter Lock in Python
> ? 

Please have a look at the archives. This topic is brought up anew
every few weeks.

> Does this mean that Python threads cannot exploit a dual core 
> processor and the only advantage of using threads is in that
> computation and IO-bound operations can continue in parallel ?

Not generally, no.

Regards,


Bj?rn

-- 
BOFH excuse #93:

Feature not yet implemented



From rrs at researchut.com  Mon Aug 13 14:10:27 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Mon, 13 Aug 2007 23:40:27 +0530
Subject: Module imports during object instantiation
References: <mailman.1845.1186783217.22759.python-list@python.org>
	<46c00f2d$0$298$426a34cc@news.free.fr>
Message-ID: <jdj6p4-g08.ln1@learner.hq.netapp.com>

Bruno Desthuilliers wrote:

> Ritesh Raj Sarraf a ?crit :
>> 
>>         if lock is None or lock != 1:
>>             self.DispLock = False
>>         else:
>>             self.DispLock = threading.Lock()
>>             self.lock = True
>> 
>>         if os.name == 'posix':
>>            self.platform = 'posix'
>>            self.color = get_colors()
>> 
>>         elif os.name in ['nt', 'dos']:
>>             self.platform = 'microsoft'
>>             
>>             try:
>>                 import SomeModule
>>             except ImportError:
>>                 self.Set_Flag = None
>>             
>>             if self.Set_Flag is not None:
>>                 self.color = SomeModule.get_colors_windows()
>> 
>>         else:
>>             self.platform = None
>>             self.color = None
>> 
>> When I create an object the "import" part never gets executed. Is there a
>> reason behind it ?
> 
> what does "print os.name" yields ?

On Windows: nt
On Linux: posix

> 
>> I mean I'd like to keep my class as independent as I want. So that when
>> later I need to use it somewhere else, I don't need to know if it depends
>> on any modules.
>  >
> 
> Then pass the module to the initializer. Python's modules are objects...
>

Yes, that's an option. But is that the only one?
To me it looks like an ugly way of doing.
 
Ritesh
-- 
If possible, Please CC me when replying. I'm not subscribed to the list.



From steveo at syslang.net  Sat Aug 25 18:02:20 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Sat, 25 Aug 2007 18:02:20 -0400 (EDT)
Subject: Need a better understanding on how MRO works?
Message-ID: <alpine.LFD.0.999.0708251652280.1739@saturn.syslang.net>

Given the following code: (I hope it's as simple as possible) :-)
#! /usr/bin/python
import new
class BASE:
     def __init__( self ):
         print 'Hello from BASE init'
     def m1( self ):
         print 'M1 Base: Self = ', self

def m1replace( self ):
     print 'm1replace:Self = ', self

class D1(BASE):
     def __init__(self):
         BASE.__init__(self)

def __InitDS101Classes():
     name = 'C1'
     nclass = new.classobj(name,(D1,),globals())
     globals()[name] = nclass
     name = 'C2'
     nclass = new.classobj(name,(D1,),globals())
     globals()[name] = nclass
     globals()[name].m1 = m1replace

__InitDS101Classes()

s = C1()
s.m1()
t = C2()
t.m1()

I get the following output:

1100 > ./foo1.py
Hello from BASE init
m1replace:Self =  <__main__.C1 instance at 0xb7e637cc>
Hello from BASE init
m1replace:Self =  <__main__.C2 instance at 0xb7e6388c>

But if I make BASE inherit from object
class BASE(object):
then I get this:

1100 > ./foo1.py
Hello from BASE init
m1replace:Self =  <__main__.NewClass instance at 0xb7f5070c>
Hello from BASE init
M1 Base: Self =  <__main__.D1 instance at 0xb7f5088c>

Can someone please explain why the assignment to C2.m1 would overwrite
BASE.m1?

TIA

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From aleax at mac.com  Sat Aug 18 12:26:10 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 18 Aug 2007 09:26:10 -0700
Subject: clarification
References: <aa405c1f0708162332t7b6dbdd6o2cc0f512dc821d7b@mail.gmail.com>
	<mailman.2107.1187350363.22759.python-list@python.org>
	<fa41k8$10n$1@news2.u-psud.fr> <13cb7frnqs8f6d9@corp.supernews.com>
	<CSsxi.28081$RX.11328@newssvr11.news.prodigy.net>
	<CTDxi.6299$4w7.2405@newssvr22.news.prodigy.net>
Message-ID: <1i31aop.2ing3h1hcfz0dN%aleax@mac.com>

samwyse <dejanews at email.com> wrote:
   ...
> Finally, does anyone familar with P3K know how best to do the reduction
> without using 'reduce'?  Right now, sets don't support the 'add' and 
> 'multiply' operators, so 'sum' and (the currently ficticious) 'product'
> won't work at all; while 'any' and 'all' don't work as one might hope.
> Are there an 'intersection' and 'union' built-ins anywhere?

For intersection and union of a sequence of sets, I'd use:

def union_all(sos):
    result = set()
    for s in sos: result.update(s)
    return result

def intersect_all(sos):
    it = iter(sos)
    result = set(it.next())
    for s in it: result.intersection_update(s)
    return result

The latter will raise an exception if sos is empty -- I don't think the
"intersection of no sets at all" has a single natural interpretation
(while the "union of no sets at all" appears to be naturally interpreted
as an empty set)... if you disagree, just wrap a try/except around the
initialization of result, and return whatever in the except clause.

Of course, hoisting the unbound method out of the loops can afford the
usual small optimization.  But my point is that, in Python, these
operations (like, say, the concatenation of a sequence of lists, etc)
are best performed "in place" via loops calling mutator methods such as
update and intersection_update (or a list's extend, etc), rather than
"functionally" (building and tossing away many intermediate results).
E.g., consider:

brain:~ alex$ python -mtimeit -s'sos=[set(range(x,x+4)) for x in
range(0, 100, 3)]' 'r=set()' 'for x in sos: r.update(x)'
100000 loops, best of 3: 18.8 usec per loop

brain:~ alex$ python -mtimeit -s'sos=[set(range(x,x+4)) for x in
range(0, 100, 3)]' 'r=reduce(set.union, sos, set())'    
10000 loops, best of 3: 87.2 usec per loop

Even in a case as tiny as this one, "reduce" is taking over 4 times
longer than the loop with the in-place mutator -- and it only gets
worse, as we're talking about O(N squared) vs O(N) performance!  Indeed,
this is part of what makes reduce an "attractive nuisance"...;-).  [[And
so is sum, if used OTHERWISE than for the documented purpose, computing
"the sum of a sequence of numbers": a loop with r.extend is similarly
faster, to concatenate a sequence of lists, when compared to sum(sol,
[])...!!!]]


Alex


From touch_my_underwear at hotmail.com  Sat Aug 18 22:34:49 2007
From: touch_my_underwear at hotmail.com (michael maver)
Date: Sun, 19 Aug 2007 12:34:49 +1000
Subject: Searching for pixel color
Message-ID: <BAY138-F31BB96C55D2B168BE6F375D7DA0@phx.gbl>

Hello, I was just wondering if anyone knew of a way to search the screen for 
a certain color in Python.

I know it is possible to do this in other languages, but I'm not sure how 
I'd go about doing this in Python. Just to let you know, I'm running windows 
XP and I don't really need it to be a cross platform solution, but if it was 
that'd be an extra bonus.

Thanks very much for taking the time to read this and, hopefully, respond!

_________________________________________________________________
Advertisement: Win Dad the Footy Final with Cadbury Favourites! 
http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fbs%2Eserving%2Dsys%2Ecom%2FBurstingPipe%2FadServer%2Ebs%3Fcn%3Dtf%26c%3D20%26mc%3Dclick%26pli%3D243221%26pi%3D0%26ord%3D%25%25RANDOM%25%25&_t=765445318&_r=hotmail_email_tagline_Aug07_Cadburys&_m=EXT



From jmcmonagle at velseis.com.au  Wed Aug  1 23:54:46 2007
From: jmcmonagle at velseis.com.au (John McMonagle)
Date: Thu, 02 Aug 2007 13:54:46 +1000
Subject: Error with Tkinter and tkMessageBox
In-Reply-To: <46af71b7$0$10619$4fafbaef@reader2.news.tin.it>
References: <46af71b7$0$10619$4fafbaef@reader2.news.tin.it>
Message-ID: <46B15586.1050703@velseis.com.au>

Fabio Z Tessitore wrote:
> hi all,
> 
> this Tkinter very simple code work fine:
> 
> ##########################
> from Tkinter import *
> 
> win = Tk()
> win.mainloop()
> ##########################
> 
> but if I try to open a message box, it happens:
> 
> Exception in Tkinter callback
> Traceback (most recent call last):
>   File "lib-tk/Tkinter.py", line 1348, in __call__
>     return self.func(*args)
>   File "/home/fabio/Desktop/prova.py", line 5, in reply
>     showinfo(title='ciao', message='hello')
>   File "lib-tk/tkMessageBox.py", line 84, in showinfo
>     return _show(title, message, INFO, OK, **options)
>   File "lib-tk/tkMessageBox.py", line 75, in _show
>     res = Message(**options).show()
>   File "lib-tk/tkCommonDialog.py", line 52, in show
>     s = w.tk.call(self.command, *w._options(self.options))
> TclError: bad pad value "2m": must be positive screen distance
> 
> 
> ##############################
> from Tkinter import *
> from tkMessageBox import *
> 
> def reply():
> 	showinfo(title='ciao', message='hello')
> 
> win = Tk()
> but = Button(win, text='press me', command=reply)
> but.pack()
> win.mainloop()
> ##############################
> 
> these are versions:
> 
> python: 			2.4.4 or 2.5.1
> Tkinter.TclVersion: 		8.4
> Tkinter.TkVersion: 		8.4
> 
> can anyone help me?
> thanks
> 
What window manager are you using ?



From seancron at gmail.com  Thu Aug 30 15:45:43 2007
From: seancron at gmail.com (seancron)
Date: Thu, 30 Aug 2007 19:45:43 -0000
Subject: Python weather application
Message-ID: <1188503143.724438.309580@x40g2000prg.googlegroups.com>

Does anybody have any suggestions for getting started on desigining a
desktop weather application in Python?

I've been looking for access to weather data and while I have found
several including the weather.com service I've decided to use the
Yahoo! Rss Weather feed since it doesn't have a license like the
weather.com service does. However one problem I have with it is that
it only accepts zip codes or locations ids.  So if a user was to enter
the name of the city instead of those two there would be an error. I
could make it so they could only enter in the location code or zip
code but I would really prefer to have it be automatically corrected.
Does anyone have ideas on how to go about this or have an other
suggestions?

Thanks,
Sean



From zyzhu2000 at gmail.com  Fri Aug 24 09:26:22 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Fri, 24 Aug 2007 13:26:22 -0000
Subject: List Comprehension Question: One to Many Mapping?
In-Reply-To: <1187934290.472868.36770@q3g2000prf.googlegroups.com>
References: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
	<1187934068.998593.201240@x40g2000prg.googlegroups.com>
	<1187934290.472868.36770@q3g2000prf.googlegroups.com>
Message-ID: <1187961982.055403.244000@r23g2000prd.googlegroups.com>

On Aug 24, 12:44 am, beginner <zyzhu2... at gmail.com> wrote:
> On Aug 24, 12:41 am, Davo <davb... at gmail.com> wrote:
>
>
>
>
>
> > On Aug 23, 9:24 pm, beginner <zyzhu2... at gmail.com> wrote:
>
> > > Hi All,
>
> > > How do I map a list to two lists with list comprehension?
>
> > > For example, if I have x=[ [1,2], [3,4] ]
>
> > > What I want is a new list of list that has four sub-lists:
>
> > > [[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]]
>
> > > [1,2] is mapped to [1,2] and [f(1), f(2)] and [3,4] is mapped to
> > > [3,4], [f(3), f(4)].
>
> > > I just can't find any way to do that with list comprension. I ended up
> > > using a loop (untested code based on real code):
>
> > > l=[]
> > > for y in x:
> > >    l.append(y)
> > >    l.append([f(z) for z in y])
>
> > > Thanks,
> > > Geoffrey
>
> > This may be what you want:
>
> > l = [[y, [f(z) for z in y]] for y in x]
>
> > But It's a bit dense.  How about:
> > l=[]
> > for y in x:
> >     Fy = [f(z) for z in y]
> >     l.extend([y, Fy])
>
> > -- David- Hide quoted text -
>
> > - Show quoted text -
>
> This is exactly what I was looking for. Thanks.- Hide quoted text -
>
> - Show quoted text -

On second thought, that will generate one additional level. So it is
not what I am looking for.



From zzbbaadd at aol.com  Thu Aug 30 12:41:00 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Thu, 30 Aug 2007 09:41:00 -0700
Subject: list index()
In-Reply-To: <87hcmhebwv.fsf@benfinney.id.au>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au>
Message-ID: <1188492060.983148.90000@r34g2000hsd.googlegroups.com>

On Aug 30, 12:09 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> zzbba... at aol.com writes:
> > What's with the index() function of lists throwing an exception on not
> > found?
>
> It's letting you know that the item isn't in the list. There's no
> sensible return value from an "index" function in that condition.

for str:

find(  	sub[, start[, end]])
    Return the lowest index in the string where substring sub is
found, such that sub is contained in the range [start, end]. Optional
arguments start and end are interpreted as in slice notation. Return
-1 if sub is not found.

-1 is used in other languages as well.



From aisaac at american.edu  Thu Aug 30 14:37:03 2007
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 30 Aug 2007 18:37:03 GMT
Subject: create Powerpoint via com
Message-ID: <j7EBi.13372$Yg.7724@trnddc02>

Can someone point me to a simple example
or better yet tutorial for creating
a Powerpoint using Python.

Thanks,
Alan Isaac


From ladynikon at gmail.com  Fri Aug  3 22:08:21 2007
From: ladynikon at gmail.com (Danyelle Gragsone)
Date: Fri, 3 Aug 2007 22:08:21 -0400
Subject: Eclipse and Python
In-Reply-To: <46B394CC.6080904@gazeta.pl>
References: <59f9c5160708030922m2f4f5179nf384135214246d14@mail.gmail.com>
	<46B394CC.6080904@gazeta.pl>
Message-ID: <59f9c5160708031908v700dc2f4sfb83b6912b272433@mail.gmail.com>

Thanks to all!
Danyelle

On 8/3/07, Lukasz <seem at gazeta.pl> wrote:
> U?ytkownik Danyelle Gragsone napisa?:
> > Does anyone have any suggested websites for learning Eclipse the python way?
> >
> > thanks,
> > Danyelle
>
> http://www.showmedo.com/videos/series?name=PyDevEclipseList
>
>
> --
> Opole - Miasto Bez Granic.
> http://www.opole.pl - tu znajdziesz nowe miejsca, nowe mozliwosci, nowe inspiracje...
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list

From nicksavill at googlemail.com  Mon Aug 27 12:56:38 2007
From: nicksavill at googlemail.com (nicksavill at googlemail.com)
Date: Mon, 27 Aug 2007 09:56:38 -0700
Subject: sorting a list of lists
Message-ID: <1188233798.684136.263640@22g2000hsm.googlegroups.com>

Hi,

i would like to sort a list of lists. The list is first sorted on the
second item in the sub-lists (which I can do), then on the third item
(which I can't).

eg. records = [['dog',1,2], ['chair',2,1], ['cat',1,3], ['horse',3,4],
['table',3,2], ['window',3,5]]

I want sorted to [['dog',1,2], ['cat',1,3], ['chair',2,1], ['table',
3,2], ['horse',3,4], ['window',3,5]]

To sort on the second item in the sub-lists I do the following

pass1 = itemgetter(1)
sorted(records, key=pass1)

How can I then sort on the third item in the sub-lists whilst keeping
the order on the second item?

Nick



From laurent.pointal at limsi.fr  Fri Aug 17 07:43:03 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 17 Aug 2007 13:43:03 +0200
Subject: clarification
In-Reply-To: <mailman.2107.1187350363.22759.python-list@python.org>
References: <aa405c1f0708162332t7b6dbdd6o2cc0f512dc821d7b@mail.gmail.com>
	<mailman.2107.1187350363.22759.python-list@python.org>
Message-ID: <fa41k8$10n$1@news2.u-psud.fr>

Thomas Jollans a ?crit :
> On Friday 17 August 2007, Beema shafreen wrote:
>> hi everybody,
>> i have a file with data separated by tab
>> mydata:
>> fhl1    fkh2
<zip>
>> shows these two are separated by tab represented as columns
>> i have to check the common data between these two coloumn1 an coloumn2
>> my code:
>> data = []
>> data1 = []
>> result = []
>> fh = open('sheet1','r')
>> for line in fh.readlines():
>>         splitted = line.strip().split('\t')
>>         data.append(splitted[0])
>>         data1.append(splitted[1])
>>         for k in data:
>>                 if k in data1:
>>                         result.append(k)
>>                         print result
>> fh.close()

Use set data type for data and data1 (you fill them with an algo like th 
one you wrote - just use add() in place of appen()) then use set 
intersection to get common data.

See doc for set data type:
http://docs.python.org/lib/types-set.html

Would look like (not tested):
data = set()
data1 = set()
fh = open('sheet1','r')
for line in fh.readlines():
     splitted = line.strip().split('\t')
     data.add(splitted[0])
     data1.add(splitted[1])

result = data.intersection(data1)


From horpner at yahoo.com  Thu Aug 30 09:31:18 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 30 Aug 2007 13:31:18 GMT
Subject: Python doesn't see the directories I create
References: <ldvBi.293202$LE1.92748@newsfe13.lga>
	<46d6856b$0$17674$426a74cc@news.free.fr>
Message-ID: <slrnfddha0.1o4.horpner@FIAD06.norwich.edu>

On 2007-08-30, Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
> mr_gadget a ?crit :
>> When I create a subfolder, python is not seeing it. Can someone please 
>> explain this behaviour ? I just started with python, read the tutorial over 
>> the weekend and am writing my very first script. So I may not be seeing 
>> something. Both os.path and glob.glob seem not to see a folder I created. 
>> Other sibling folders seem to work fine. On a whim I tried paths with \\ 
>> double slashes and that worked. But why should single slashes work for some 
>> folders and not for others ??
>
> s/slash/antislash/g
>
> It's a very well known gotcha due to MS's choice to use the
> antislash as path separator. In most languages - Python
> included - the antislash is used for escape sequences
> (non-printable characters). 

Keeping in mind which came first, isn't it at least as accurate
to attribute this problem to Python's choice of escape character?
There were probably advantages to adopting the same escape
character as other well-known languages/codes, but the choice has
caused some trouble over the years. 

To me, Python's collection of special-purpose string literal
notations is one of its little warts.

Of course, I'm not smart enough to have delivered the ONE TRUE
string literal notation either, but I do have a computer and an
internet connection, so there you are.

-- 
Neil Cerutti


From deets at nospam.web.de  Thu Aug  9 09:03:13 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 09 Aug 2007 15:03:13 +0200
Subject: Jython - variables are stored somehow
In-Reply-To: <1186662600.413645.25430@22g2000hsm.googlegroups.com>
References: <1186662600.413645.25430@22g2000hsm.googlegroups.com>
Message-ID: <5i0hkjF3l6rsqU1@mid.uni-berlin.de>

nmin at freenet.de schrieb:
> Hi,
> 
> I'm using Jython in combination with java.
> 
> I wrote a jython skript, which calls a function from another jython
> module called library.py.
> 
> So, executing the function genData() in skript .py runs without
> problem but if I execute the same function again, the data from the
> first run is stored somehow and is added to the new data.
> 
> So, if you look at the result:
> #1 in DatenTypen.py return an empty list each time the program runs.
> Ok ... clear so far
> #2 in library.py returns an empty list, when the program runs for the
> first time ... but when the function is
> called again, the list contains an element. Each time you call the
> function again, one element is added!
> Why??  out.abschnitte should be the same as printed in #1 or not?
> 
> Here is the code:
> 
> skript.py
> ======
> from library import *
> 
> def genData():
> 
>  
> out=DMS_sendFiles_ein_Abschnitt([["testdata1.test","testdata2.test","testdata3.test"]])
> 
>     return out
> 
> library.py
> =======
> from DatenTypen import AusgangsDatenDeichMonitor
> from DatenTypen import DMS_Abschnitt
> from DatenTypen import DMS_GeoData
> from DatenTypen import DMS_GeoDataFile
> 
> def DMS_sendFiles_ein_Abschnitt(filelist):
> 
>     out=AusgangsDatenDeichMonitor()
> 
>     print "out.abschnitte: "+str(out.abschnitte) #2
> 
>     abschnitt=DMS_Abschnitt()
> 
>     for f in filelist:
>         data=DMS_GeoData()
> 
>         for layer in f:
> 
>             datalayer=DMS_GeoDataFile()
> 
>             datalayer.dateiname=layer
> 
>             datalayer.dateiinhalt="TEST"
> 
>             data.layerFiles.append(datalayer)
> 
>         abschnitt.bildSequenze.append(data)
> 
>     out.abschnitte.append(abschnitt)
> 
>     return out
> 
> DatenTypen.py
> ===========
> 
> class AusgangsDatenDeichMonitor:
> 
>     abschnitte=[]
> 
>     def __init__(self):
>         abschnitte=[]
>         print "Abschnitt in DatenTypen: "+str(abschnitte) #1
> 
> class DMS_Abschnitt:
> 
>     bildSequenze=[]
> 
>     def __init__(self):
>         abschnittsNummer=0
>         bildSequenze=[]
> 
> class DMS_GeoData:
> 
>     layerFiles=[]
> 
>     def __init__(self):
>         layerFiles=[]
> 
> class DMS_GeoDataFile:
> 
>     dateiinhalt="dateiinhalt"
> 
>     dateiname="dateiname"
> 
>     zipped=False
> 
>     def __init__(self):
>         dateiinhalt="dateiinhalt"
>         dateiname="dateiname"
>         zipped=False
> 
> So, I read about deleting Instances with "del" ... but it does not
> work at all.
> 
> Any Ideas?

I think you should read a python-tutorial. The above code looks as if 
you believe that

class Foo:
    name = value

    def __init__(self):
        name = other_value

will create a class Foo, which then has instances with the property 
"name", and that this is bound to other_value. Python isn't doing that.


name in the above example (and e.g. abschnitte in yours) are 
class-attributes. That means that ALL instances of Foo share that name!!!

What you have to do is this:

class Foo:
    def __init__(self, other_value):
       self.name = other_value


please note the self in front of name!



Or, within your example:

class AusgangsDatenDeichMonitor:

     def __init__(self):
         self.abschnitte=[]
         print "Abschnitt in DatenTypen: "+str(abschnitte) #1


There are a great many tutorials for python + OO out there - go read one 
(or several).

Regards,

Diez


From uymqlp502 at sneakemail.com  Tue Aug 28 21:04:00 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Tue, 28 Aug 2007 18:04:00 -0700
Subject: status of Programming by Contract (PEP 316)?
Message-ID: <1188349440.309634.182800@z24g2000prh.googlegroups.com>

I just stumbled onto PEP 316: Programming by Contract for Python
(http://www.python.org/dev/peps/pep-0316/). This would be a great
addition to Python, but I see that it was submitted way back in 2003,
and its status is "deferred." I did a quick search on
comp.lang.python,
but I don't seem to see much on it. Does anyone know what the real
status is of getting this into standard Python? Thanks.



From steve at holdenweb.com  Thu Aug  9 16:38:18 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Aug 2007 16:38:18 -0400
Subject: Puzzled by "is"
In-Reply-To: <1186691088.090783.93810@z24g2000prh.googlegroups.com>
References: <20070809194105.39BD11E400A@bag.python.org>	<mailman.1810.1186689236.22759.python-list@python.org>
	<1186691088.090783.93810@z24g2000prh.googlegroups.com>
Message-ID: <f9ftvn$mpk$1@sea.gmane.org>

kyosohma at gmail.com wrote:
[...]
> 
> Steve,
> 
> I thought you'd probably weigh in on this esoteric matter. Very
> illuminating, as usual.
> 
Thank you!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From hg at nospam.org  Wed Aug  1 21:27:46 2007
From: hg at nospam.org (hg)
Date: Wed, 01 Aug 2007 20:27:46 -0500
Subject: Wing IDE for Python v. 3.0 beta1 released
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
	<mailman.1475.1186015988.22759.python-list@python.org>
	<1186016981.502313.268700@r34g2000hsd.googlegroups.com>
Message-ID: <mqasi.139108$wG2.126273@newsfe17.lga>

Fuzzyman wrote:

> On Aug 2, 1:46 am, "Greg Donald" <gdon... at gmail.com> wrote:
>> On 8/1/07, John K Masters <johnmast... at oxtedonline.net> wrote:
>>
>> > If their support for paid customers is anything like their support for
>> > prospective customers then I would leave well alone.
>>
>> I had no problems with their support whatsoever, really good in my
>> opinion.  They were very responsive and addressed all my questions
>> over about a 3 or 4 day email conversation.
>>
>> --
>> Greg Donaldhttp://destiney.com/
> 
> I'll third that. I have had excellent and extended support from the
> Wing guys. Definitely recommended.
> 
> Fuzzyman
> http://www.voidspace.org.uk/python/articles.shtml

I sent a bug report 10 minutes ago and already have received an answer with
a possible way out !

hg




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug  8 06:10:57 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 08 Aug 2007 12:10:57 +0200
Subject: Seek the one billionth line in a file containing 3 billion lines.
In-Reply-To: <mailman.1729.1186557385.22759.python-list@python.org>
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>	<7xzm12o7o7.fsf@ruckus.brouhaha.com>
	<mailman.1729.1186557385.22759.python-list@python.org>
Message-ID: <46b996b1$0$12384$426a74cc@news.free.fr>

Jay Loden a ?crit :
(snip)
> If we just want to iterate through the file one line at a time, why not just:
> 
> count = 0
> handle = open('hugelogfile.txt')
> for line in handle.xreadlines():
>     count = count + 1
>     if count == '1000000000':
>         #do something

for count, line in enumerate(handle):
     if count == '1000000000':
         #do something


NB : files now (well... since 2.3) handle iteration directly
http://www.python.org/doc/2.3/whatsnew/node17.html


From michele.petrazzo at TOGLIunipex.it  Wed Aug  1 03:20:03 2007
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Wed, 01 Aug 2007 09:20:03 +0200
Subject: Strange problems with subprocess
Message-ID: <f8pc74$s2p$1@nnrp-beta.newsland.it>

Hi all. I have a simple "ping tester" program that, every 1 minute
(execute by linux crontab), create, with subprocess, a
"ping -c 1 my_addrs". All work, but sometime (about 1/2 times at a day),
I receive this error message:

File "/exports/srv-wipex/net_test/ping_tester.py", line 88, in pyPing
   cmd_p = Popen(cmd, stdout=PIPE, stderr=PIPE)
File "subprocess.py", line 543, in __init__
   errread, errwrite)
File "subprocess.py", line 970, in _execute_child
   data = os.read(errpipe_read, 1048576) # Exceptions limited to 1 MB

What can be that raise this?

Python 2.4 in deb etch

Thanks,
Michele


From Graham.Dumpleton at gmail.com  Mon Aug 27 18:12:50 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Mon, 27 Aug 2007 22:12:50 -0000
Subject: some problems with mod_python
In-Reply-To: <1188245587.129794.258250@z24g2000prh.googlegroups.com>
References: <1188245587.129794.258250@z24g2000prh.googlegroups.com>
Message-ID: <1188252770.954357.224380@x40g2000prg.googlegroups.com>

On Aug 28, 6:13 am, Johan <val... at gmail.com> wrote:
> Hi
>
> I have installed and tested this on centos, fedora and freebsd all
> give the same problem so I guess I missed some steps.
>
> I have compiled bot apache (2.2.4) and mod_python (3.3.1) according to
> the docs and no problem with this.
> But when I have made everything about testing mod_python an browse tohttp://server/testand there expecting to see "Hello world" I instead
> get an index of contents in this directory. If I go to  http://server/test/mptest.py
> it works. No errors in any log either.
>
> What Have I missed?
>
> This I added to httpd.conf
> <Directory /opt/site/htdocs/test>
>         AllowOverride All
>         AddHandler mod_python .py
>         PythonHandler mptest
>         PythonDebug On
> </Directory>
>
> this is my mptest.py:
> from mod_python import apache
>
> def handler(req):
>         req.content_type = 'text/plain'
>         req.write("Hello World!")
>         return apache.OK
>
> /johan

You need to look at the Apache documentation for the difference
between AddHandler and SetHandler directives. If you don't want to
read the Apache documentation and learn more about it, at least read:

http://www.dscpl.com.au/wiki/ModPython/Articles/SetHandlerVersusAddHandler

Graham




From a.harrowell at gmail.com  Fri Aug 17 10:43:11 2007
From: a.harrowell at gmail.com (TYR)
Date: Fri, 17 Aug 2007 14:43:11 -0000
Subject: Naming dictionaries recursively
In-Reply-To: <5ilkebF3oltfoU2@mid.uni-berlin.de>
References: <1187354296.177606.273300@22g2000hsm.googlegroups.com>
	<5ilkebF3oltfoU2@mid.uni-berlin.de>
Message-ID: <1187361791.979162.46330@22g2000hsm.googlegroups.com>


> So the tougher problem seems to be parsing those lines.  That is not a
> valid Python dictionary unless the names `Bob`, `Humboldt`, `red`, and
> `predatory` are not already defined.  So you can't just ``eval`` it.

In what way? {'key': val}, right?

Anyway, I can always change the format they go into the file in.






From zyzhu2000 at gmail.com  Sat Aug 18 20:40:41 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Sun, 19 Aug 2007 00:40:41 -0000
Subject: How to call module functions inside class instance functions?
Message-ID: <1187484041.838615.259980@e9g2000prf.googlegroups.com>

Hi Everyone,

I have encountered a small problems.  How to call module functions
inside class instance functions? For example,  calling func1 in func2
resulted in a compiling error.

"my module here"

def func1():
     print "hello"

class MyClass:
   def func2():
         #how can I call func1 here.
         func1() #results in an error


Thanks,
Geoffrey



From vedrandekovic at v-programs.com  Fri Aug 10 03:39:55 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Fri, 10 Aug 2007 00:39:55 -0700
Subject: py2exe with python 2.5
Message-ID: <1186731595.139576.107660@e9g2000prf.googlegroups.com>

Hello,

Now,I was install python 2.5 and remove python 2.4 completely.After I
write:
$ python mysetup.py py2exe
.......
     import py2exe_ util
ImportError: Module use of conflicts with this version of Python

...ok, I know what is a problem, I haven't remove python completely,
in my computer is one more folder Panda3D-1.4.0 but when I remove it
and all dll files include python24.dll, I cannot run python or make
that setup.
(That panda3d contain python)


Regards,
Vedran



From kar1107 at gmail.com  Tue Aug 21 20:40:35 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Tue, 21 Aug 2007 17:40:35 -0700
Subject: Chaining programs with pipe
In-Reply-To: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
Message-ID: <1187743235.124030.321200@l22g2000prc.googlegroups.com>

On Aug 21, 3:09 pm, avishay <avish... at yahoo.com> wrote:
> Hello
> I'm trying to chain two programs with a pipe (the output of one
> feeding the input of the other). I managed to capture the output and
> feeding the input of each program independently with popen, but how do
> I tie them together? Is there a solution that works equally on all
> platforms?

Not sure on non-unix platforms, but in unix like platforms it's best
to reuse shell's power.

>>> import commands
>>> commands.getoutput('ls | wc')
'      4       4      24'
>>>

Thanks,
Karthik

>
> Thanks,
> Avishay




From rrs at researchut.com  Wed Aug 15 15:43:18 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Wed, 15 Aug 2007 19:43:18 -0000
Subject: Module imports during object instantiation
In-Reply-To: <1187205375.871837.254400@r34g2000hsd.googlegroups.com>
References: <4c3vo4-u7k.ln1@learner.hq.netapp.com>
	<mailman.1931.1187030415.22759.python-list@python.org>
	<46c16ec9$0$405$426a34cc@news.free.fr>
	<mailman.1956.1187091452.22759.python-list@python.org>
	<slrnfc36p9.21o.horpner@FIAD06.norwich.edu>
	<mailman.1965.1187101832.22759.python-list@python.org>
	<slrnfc3gg4.1l4.horpner@FIAD06.norwich.edu>
	<mailman.2025.1187200876.22759.python-list@python.org>
	<slrnfc6ieo.14k.horpner@FIAD06.norwich.edu>
	<1187205375.871837.254400@r34g2000hsd.googlegroups.com>
Message-ID: <1187206998.252482.300780@a39g2000hsc.googlegroups.com>

On Aug 16, 12:16 am, Ritesh Raj Sarraf <r... at researchut.com> wrote:
> On Aug 15, 11:42 pm, Neil Cerutti <horp... at yahoo.com> wrote:
>
> > On 2007-08-15, Ritesh Raj Sarraf <r... at researchut.com> wrote:
> > > Or am I terribly missing something that you are trying to tell ?
>
> > I didn't see log = Log() in your example. Sorry for the
> > excursion.
>
> > Are you sure os.name is 'posix' on your system?
>
> Here again for you:
>
> In [6]: cat rick.py
> IPython system call: cat rick.py
> import os, sys
>
> class Log:
>     def __init__(self, verbose, lock = None):
>         self.VERBOSE = bool(verbose)
>         self.lock = bool(lock)
>
>         if self.lock:
>             self.dispLock = threading.Lock()
>         else:
>             self.dispLock = None
>
>         if os.name == 'posix':
>             try:
>                 import foobar
>             except ImportError, e:
>                 print >> sys.stderr, e
>
>             self.platform = 'posix'
>             self.color = get_colors()
>
>         elif os.name in ['nt', 'dos']:
>             self.platform = 'microsoft'
>             try:
>                 import SomeModule
>             except ImportError, e:
>                 # comment out next line before going to prod...
>                 print >> sys.stderr, e
>
>                 self.color = None
>             else:
>                 self.color = SomeModule.get_colors_windows()
>         else:
>             self.platform = None
>             self.color = None
>
> In [7]: from rick import Log
>
> In [8]: log = Log(verbose = True)
> No module named foobar
> ---------------------------------------------------------------------------
> exceptions.NameError                                 Traceback (most
> recent call last)
>
> /tmp/<ipython console>
>
> /tmp/rick.py in __init__(self, verbose, lock)
>      18
>      19             self.platform = 'posix'
> ---> 20             self.color = get_colors()
>      21
>      22         elif os.name in ['nt', 'dos']:
>
> NameError: global name 'get_colors' is not defined
>

Oops!!! Looks like I completely missed this. It _did_ print the error
message.
Apologies to all for not keeping a close eye on the error message.



From daniels at dsl-only.net  Thu Aug 30 00:29:28 2007
From: daniels at dsl-only.net (Scott David Daniels)
Date: Wed, 29 Aug 2007 21:29:28 -0700
Subject: Python molecular viewer
In-Reply-To: <mailman.103.1188394354.28954.python-list@python.org>
References: <mailman.103.1188394354.28954.python-list@python.org>
Message-ID: <13dchs8a39et77f@corp.supernews.com>

Andy Cheesman wrote:
> Dear People,
> 
> I was wondering if people could recommend a simple molecular viewing
> package written in python. I'm working in Theoretical chemistry and I'm
> not after an all-singing dancing molecular rendering package(pymol does
> that rather well) but a program which reads XYZ files and displays
> simple structures which can be rotated in 3D

You could use VPython if you know how to convert XYZ files to ball and
stick locations to cartesian coordinates.


From gur.tom at gmail.com  Thu Aug 30 03:50:30 2007
From: gur.tom at gmail.com (Tom Gur)
Date: Thu, 30 Aug 2007 07:50:30 -0000
Subject: Embedding the python interpreter
In-Reply-To: <13d879psf7e080@corp.supernews.com>
References: <1188305107.028128.136960@d55g2000hsg.googlegroups.com>
	<13d879psf7e080@corp.supernews.com>
Message-ID: <1188460230.341009.213860@50g2000hsm.googlegroups.com>

On Aug 28, 4:03 pm, Grant Edwards <gra... at visi.com> wrote:
> On 2007-08-28, Tom Gur <gur.... at gmail.com> wrote:
>
> > Hey,
>
> > Do you know an easy way to embed the python interpreter in a python
> > program (so a non-technical user, which has no idea how to install the
> > python interpreter would be able to run the script as an executable) ?
>
> Hey,
>
> This question is asked at least once a week.  I'm surprised you
> didn't see the threads.  [It probably should be int he FAQ, but
> isn't.]
>
> http://www.py2exe.org/http://sourceforge.net/projects/cx-freeze/http://pyinstaller.hpcf.upr.edu/cgi-bin/trac.cgihttp://cheeseshop.python.org/pypi/py2app/
>
> --
> Grant Edwards                   grante             Yow! Could I have a drug
>                                   at               overdose?
>                                visi.com

Thanks a lot !



From lingyun.yang at gmail.com  Sat Aug 11 03:53:30 2007
From: lingyun.yang at gmail.com (Bailu)
Date: Sat, 11 Aug 2007 07:53:30 -0000
Subject: deselect an iterm in ListBox  wxPython
Message-ID: <1186818810.685844.263700@w3g2000hsg.googlegroups.com>

Hi,

   I am a newbie in wxPython and doing a program with ListBox,
I want to select and deselect items in this box,
I have use

self.devlist = wx.ListBox(self, style=wx.LB_MULTIPLE)
self.Bind(wx.EVT_LISTBOX, self.select_dev, self.devlist)

to create this box, but don't know how to implement self.select_dev
to find out which one is clicked

deselect it, if it was selected  ( this is not working at default)
select it, if it was not (toggle)

The default behavior is, the selection is increasing, I can't deselect
any of them.

Thanks.

Lingyun



From rcdailey at gmail.com  Tue Aug 21 12:00:24 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 21 Aug 2007 11:00:24 -0500
Subject: Python is removing my quotes!
Message-ID: <496954360708210900p6da42670o3a28d6b0dbd4c524@mail.gmail.com>

Hi,

Note: I'm using Python on Windows

I have an application that allows a user to submit a password as a command
line parameter. The password of choice may contain any characters the user
wishes, including quotes. If I do the following:

python password.py "9999"MyPassword

The resulting output when I print this inside the script is:

9999MyPassword

Notice how the quotations have been stripped. Is it DOS doing this, or
Python? Is there a way I can fix it?

Thanks.
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From kyosohma at gmail.com  Wed Aug  8 15:39:03 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 08 Aug 2007 19:39:03 -0000
Subject: Launch file from Python
In-Reply-To: <mailman.1764.1186601788.22759.python-list@python.org>
References: <1186594137.971393.128780@57g2000hsv.googlegroups.com>
	<1186594611.490723.251870@m37g2000prh.googlegroups.com>
	<mailman.1764.1186601788.22759.python-list@python.org>
Message-ID: <1186601943.551097.82360@j4g2000prf.googlegroups.com>

On Aug 8, 2:35 pm, Arnau Sanchez <ar... at ehas.org> wrote:
> kyoso... at gmail.com escribi?:
>
> > That's just the exit status or run status, if I recall correctly. I
> > think 0 (i.e. False) means it didn't run properly and anything else is
> > True, or ok. Something like that.
>
> The other way: 0 means "ok" while everything else means error (at least in
> UNIX). The reason is clear: there is usually only one way to do things well, but
> many to fail :-)
>
> > Technically speaking, you should
> > probably switch to using the subprocess module as it is replacing that
> > os module's functionality:http://www.python.org/doc/2.4/lib/module-subprocess.html
>
> Correct, subprocess replaces low-level os.system, os.popen*, os.spawn*, popen*
> functions.

Figures...I couldn't find the docs on it though...and I do know that
some Windows programs return goofy numbers in the 1000s that mean it
worked fine. So, in other words, the return value isn't very helpful.

Mike



From steve at holdenweb.com  Mon Aug  6 11:26:48 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Aug 2007 11:26:48 -0400
Subject: boolean operations on sets
In-Reply-To: <1186409631.147290.323400@22g2000hsm.googlegroups.com>
References: <1186409631.147290.323400@22g2000hsm.googlegroups.com>
Message-ID: <f97ejn$mer$1@sea.gmane.org>

Flavio wrote:
> Hi, I have been playing with set operations lately and came across a
> kind of surprising result given that it is not mentioned in the
> standard Python tutorial:
> 
> with python sets,   intersections  and unions are supposed to be done
> like this:
> In [7]:set('casa') & set('porca')
> Out[7]:set(['a', 'c'])
> 
> In [8]:set('casa') | set('porca')
> Out[8]:set(['a', 'c', 'o', 'p', 's', 'r'])
> 
> and they work correctly. Now what is confusing is that if you do:
> 
> In [5]:set('casa') and set('porca')
> Out[5]:set(['a', 'p', 'c', 'r', 'o'])
> 
> In [6]:set('casa') or set('porca')
> Out[6]:set(['a', 'c', 's'])
> 
> The results are not what you would expect from an AND  or OR
> operation, from the mathematical point of view! aparently the "and"
> operation is returning the the second set, and the "or" operation is
> returning the first.
> 
> If python developers wanted these operations to reflect the
> traditional (Python) truth value for data structures: False for empty
> data structures and True otherwise, why not return simply True or
> False?
> 
> So My question is: Why has this been implemented in this way? I can
> see this confusing many newbies...
> 
it has been implemented in this way to conform with the definitions of 
"and" and "or", which have never been intended to apply to set 
operations. The result of these operations has always returned one of 
the operands in the case where possible, and they continue to do so with 
set operands.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From amccabe at hawkeyerec.com  Tue Aug 14 09:50:44 2007
From: amccabe at hawkeyerec.com (Tony)
Date: Tue, 14 Aug 2007 08:50:44 -0500
Subject: Script to copy database
References: <GeOdnSj725utPFzbnZ2dnUVZ_vOlnZ2d@centurytel.net>
	<f9s9ks$hns$1@news2.u-psud.fr>
Message-ID: <PN2dnYNQMMplLlzbnZ2dnUVZ_vCknZ2d@centurytel.net>

Thanks Laurent.  That was very helpful.  Pretty easy too.

Thanks again for your help.
Tony



"Laurent Pointal" <laurent.pointal at limsi.fr> wrote in message 
news:f9s9ks$hns$1 at news2.u-psud.fr...
> Tony a ?crit :
>> I'm new at this and would like to know how set up a script to copy a 
>> database from a local computer to a network at a certain time everyday. 
>> Should be simple enough, but, as of now I am unfamiliar with how to do 
>> this. Would this be done by writing a script and setting up a  scheduled 
>> task to run the script?  Can anyone help me with the script?  Just need 
>> it to copy an Access database from the local C: drive to a network F: 
>> drive.
>>
>> Thanks,
>> Tony
>
> As you wrote about c: and f:, I imagine you are working under Windows.
> IMHO you dont need Python for that.
>
> domybackup.bat
>
> copy c:\mypathtothefile\thefile.xxx F:\mypathdobackudir\
>
>
> And use your "planificateur de taches" (its corresponding english control 
> panel) to setup a periodic call to this batch file, eventually associate 
> an ad-hoc account to the task, so that the batch can access the file to 
> backup.
>
>
> If you need more (ie. network access to setup/clean), here is a copy of a 
> script I use to export (using a Python script) an Access database. Just 
> replace the call to the Python script by a simple call to copy xxx yyyy.
>
>
>
> @echo off
> REM LANCEMENT DE L'EXPORT DE LA BASE ADMINISTRATIVE EN MODE TACHE
> REM DE FOND (BATCH).
>
> SET EXPORTS_BATCH=1
> REM Parametres pour se connecter a la machine de transfert.
> SET EXPORTS_HOST=thecomputer
> SET EXPORTS_SHARE=data
> SET EXPORTS_DRIVE=O:
> SET EXPORTS_USER=theremotuser
> SET EXPORTS_PASSWD=theremotepasswd
> REM Montage du volume.
> REM le start pour permettre d'attendre que le montage soit effectif.
> START /wait NET USE %EXPORTS_DRIVE% \\%EXPORTS_HOST%\%EXPORTS_SHARE% 
> %EXPORTS_PASSWD% /USER:%EXPORTS_USER% /PERSISTENT:No
> IF ERRORLEVEL 1 GOTO erreur_montage
>
> REM Parametres pour le script Python.
> SET SCRIPT_EXPORT="C:\Documents and Settings\myaccount\My 
> Documents\mybexport.py"
> SET DSN_BASE_ADMIN=mydbaccound
> SET LOGIN_BASE_ADMIN=mydbpasswd
> SET PATH_FICHIERS_EXPORTS=%EXPORTS_DRIVE%\
> REM Variables d'environnement eventuellement utiles...
> SET TEMP=%PATH_FICHIERS_EXPORTS%
> SET TMP=%PATH_FICHIERS_EXPORTS%
> REM Lancement du script Python qui realise l'export.
> C:\Tools\Python24\python.exe %SCRIPT_EXPORT%
>
> REM Deconnexion du volume.
> NET USE %EXPORTS_DRIVE% /DELETE
>
> goto termine
>
> :erreur_montage
> ECHO "Erreur %ERROR_LEVEL% au montage de \\%EXPORTS_HOST%\%EXPORTS_SHARE% 
> en lecteur %EXPORTS_DRIVE%."
>
> :termine 




From DustanGroups at gmail.com  Tue Aug 28 07:28:54 2007
From: DustanGroups at gmail.com (Dustan)
Date: Tue, 28 Aug 2007 11:28:54 -0000
Subject: How to parse this line of code manually
In-Reply-To: <slrnfd7lev.phn.hat@se-162.se.wtb.tue.nl>
References: <1188270013.785762.9360@z24g2000prh.googlegroups.com>
	<1188271385.875677.78560@i38g2000prf.googlegroups.com>
	<slrnfd7lev.phn.hat@se-162.se.wtb.tue.nl>
Message-ID: <1188300534.952616.109760@o80g2000hse.googlegroups.com>

On Aug 28, 2:59 am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> On 2007-08-28, Davy <zhushe... at gmail.com> wrote:
>
>
>
> > On Aug 28, 11:00 am, Davy <zhushe... at gmail.com> wrote:
> >> Hi all,
>
> >> It is well known that Python is appreciated for its merit of concise.
> >> However, I found the over concise code is too hard to understand for
> >> me.
>
> >> Consider, for instance,
> >> def known_edits2(word):
> >>     return set(e2 for e1 in edits1(word) for e2 in edits1(e1) if e2 in
> >> NWORDS)
>
> >> Shall I understand the code in set() as
> >> for e2 in edits1(e1) {
> >>     if e2 in NWORDS {
> >>         for e1 in edits1(word) {
> >>              e2
> >>         }
> >>     }
>
> >> }
>
> > [SNIP]
> > Hi all, I figured it myself. It is left to righ parse, right?
> > So the above one is like
> > for e1 in edits1(word) {
> >     for e2 in edits1(e1) {
> >         if e2 in NWORDS {
> >             push e2 to set
> >         }
> >     }
> > }
>
> This is correct, although I am not sure what language you are using here, it
> looks like a strange mix of Python and C to me.
>
> >> Any suggestions are welcome!
>
> The idea is known as List comprehension (for lists, obviously), and comes from
> functional programming, Bird & Wadler used it in their book.
>
> The notation is very close to mathematics:
>
>  { e2 | e1: edits(word), e2: edits(e1) in NWORDS }
>
> or in LaTeX:
>
> $\{ e_2 | \forall e_1: \mathrm{edits}(\mathrm{words}),
>           \forall e_2: \mathrm{edits}(e_1) \in \mathrm{NWORDS} \}$
>
> :-)
>
> (which in words is something like: collect values e2, where e1 comes from
> 'edits(word)', e2 comes from 'edits(e1)', and e2 in NWORDS)
>

For more examples:
http://docs.python.org/tut/node7.html#SECTION007140000000000000000

A 'list comprehension' with parentheses instead of square-brackets
creates a generator instead of a list, which can be more memory-
efficient and allows for lazy evaluation.



From steve at holdenweb.com  Sat Aug  4 09:23:10 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 04 Aug 2007 09:23:10 -0400
Subject: how to run os.execv() to run command pslq dbname < gen.command
In-Reply-To: <1186229986.707259.323130@19g2000hsx.googlegroups.com>
References: <1186229986.707259.323130@19g2000hsx.googlegroups.com>
Message-ID: <f91uju$130$1@sea.gmane.org>

Sonu wrote:
> hello all ,
> i need to run psql from my py file,,
> for that i am using : os.execv(path for psql ,['psql dbname <
> gen.command'])
> but its not working ..........
> 
I want to watch my TV, but it's not working. Can you tell me how to fix 
it? ...

> the  command wht i want to run from this py file is :>>>psql dbname <
> gen.command
> 
> where gen.command file contain some command to create csv file from
> database
> 
> \o temp.csv
> \a
> \f ,
> select * from temp
> 
> if u have any idea plz help me,,
> 
Perhaps you could post your code, and a copy of the error messages you 
see when you run this program? That will give a much better idea of what 
the problem is.

You do realise that the snippet you posted isn't even legal Python, right?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From arkanes at gmail.com  Wed Aug  1 13:35:41 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 1 Aug 2007 12:35:41 -0500
Subject: Assertion in list comprehension
In-Reply-To: <1185988597.055293.106540@q3g2000prf.googlegroups.com>
References: <1185982643.001546.138180@e16g2000pri.googlegroups.com>
	<mailman.1439.1185985738.22759.python-list@python.org>
	<1185988597.055293.106540@q3g2000prf.googlegroups.com>
Message-ID: <4866bea60708011035sb0cbff6s3daea4fc1286be73@mail.gmail.com>

On 8/1/07, beginner <zyzhu2000 at gmail.com> wrote:
> On Aug 1, 11:28 am, "Chris Mellon" <arka... at gmail.com> wrote:
> > On 8/1/07, beginner <zyzhu2... at gmail.com> wrote:
> >
> >
> >
> >
> >
> > > Hi,
> >
> > > Does anyone know how to put an assertion in list comprehension? I have
> > > the following list comprehension, but I want to use an assertion to
> > > check the contents of rec_stdl. I ended up using another loop which
> > > essentially duplicates the functions of list comprehension. It just
> > > look like a waste of coding and computer time to me.
> >
> > > I just wish I could put the assertions into list comprehensions.
> >
> > >         x=[(rec_stdl[0].st/10000.0,
> > >             rec_stdl[0].cl,
> > >             rec_stdl[0].bb,
> > >             rec_stdl[0].bo,
> > >             rec_stdl[1].bb,
> > >             rec_stdl[1].bo,
> > >             rec_stdl[0].ex
> > >            )
> > >            for rec_stdl in rec_by_ex if len(rec_stdl)==2
> > >         ]
> >
> > >         #duplicated loop
> > >         if __debug__:
> > >             for rec_stdl in rec_by_ex:
> > >                 l=len(rec_stdl)
> > >                 assert(l<=2 and l>0)
> > >                 if l==2:
> > >                     assert(rec_stdl[0].c=="C" and rec_stdl[1].c=="P")
> > >                     assert(rec_stdl[0].ex==rec_stdl[1].ex)
> > >                     assert(rec_stdl[0].st==rec_stdl[1].st)
> > >                     assert(rec_stdl[0].cp==rec_stdl[1].cp)
> >
> > First: All your asserts are wrong. Assert is a statement, not a
> > function. These specific ones will behave as expected, but it's easy
> > to accidentally write ones that always pass this way.
>
>
> Do you mean I should not use the parentheses?
>

Yes.

>
> > Secondly: This is a waste of code, because if __debug__ is not defined
> > asserts will be skipped by the compiler. You could use the same loop
> > block for both branches.
>
> I know. My original question was how. Dan suggested to write a checker
> function.
>

Use the second block in all cases. In any situation where "if
__debug__" is False, the asserts are a noop and in fact won't even be
present in the bytecode.

>
> > Thirdly: This sort of testing is precisely what unit tests and/or
> > doctests are for.
>
> Agreed.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From a.schmolck at gmail.com  Mon Aug 13 11:49:02 2007
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: Mon, 13 Aug 2007 16:49:02 +0100
Subject: Fatest standard way to sum bytes (and their squares)?
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
	<yfs643l84fu.fsf@gmail.com>
	<ntGdnTiqYbjGPyLbnZ2dnUVZ_gadnZ2d@speakeasy.net>
Message-ID: <yfsps1r5tap.fsf@gmail.com>

Erik Max Francis <max at alcyone.com> writes:

> Alexander Schmolck wrote:
>
>> Is this any faster?
>>
>>  ordSum, orsSumSq = (lambda c:c.real,c.imag)(sum(complex(ord(x),ord(x)<<1)
>> for x in data))
>
> That's pretty clever, but I neglected to mention that I need to accumulate the
> sums as ints/longs to avoid losing precision, so converting to floating point
> isn't an optional.

I think you can safely use this trick (provided it really makes things faster)
provided you sum blocks no larger than 2**(53-8) bytes; if your files are
really that big you'd certainly want to split summing into several blocks
anyway, because otherwise you'll be doing *lots* of extra bignum arithmetic
instead of int32/int64 addition (I'd assume this will slow things noticably
down even in python). Another trick you could try, again using table-lookup:
work on words (i.e. 2bytes) instead of single bytes again using a table (from
word->(byte-sum,sq-byte-sum) tuples) ; this will half the function calls and
the table size of is hopefully still small enough to not to ruin your
cache-hit rate (you might want to try array).

'as


From thomas at jollans.com  Thu Aug  2 10:35:51 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Thu, 2 Aug 2007 16:35:51 +0200
Subject: Determining if file is valid image file
In-Reply-To: <1186064275.652416.250540@d55g2000hsg.googlegroups.com>
References: <1186064098.587590.91210@g4g2000hsf.googlegroups.com>
	<1186064275.652416.250540@d55g2000hsg.googlegroups.com>
Message-ID: <200708021635.52490.thomas@jollans.com>

On Thursday 02 August 2007, Andr? wrote:
> On Aug 2, 11:14 am, Andr? <andre.robe... at gmail.com> wrote:
> > Other than installing PIL, is there a "simple" way using Python only
> > to determine if a file is a valid image file?
> >
> > I'd be happy if I could at least identify valid images files for gif,
> > jpeg and png.   Pointers to existing modules or examples would be
> > appreciated.
> >
> > The reason why I'd prefer not using PIL is that I'd like to bundle
> > such a function/module in my app.
>
> I should have added: I'm interesting in validating the file *content*
> - not the filename :-)

The file name has nothing to do with the type :-P

A straightforward way you won't like: read the specs for all formats you're 
interested in and write the function yourself ;-)


From dimitri.pater at gmail.com  Mon Aug  6 05:59:36 2007
From: dimitri.pater at gmail.com (dimitri pater)
Date: Mon, 6 Aug 2007 11:59:36 +0200
Subject: webbrowser.open question force Firefox
Message-ID: <e75321bd0708060259p32249f96sa327ec4b505cc981@mail.gmail.com>

Hi,
I have a question regarding the use of webbrowser.open.
On a windows XP machine, MS-IE is set as the default browser so when I do:
webbrowser.open('http://localhost:8080') IE starts with this address.
But in stead of launching IE, I want to launch Firefox *without* setting
Firefox as the default browser globally on this machine.

Any hints, ideas? Your help is most appreciated.
regards,
Dimitri
-- 
---
You can't have everything. Where would you put it? -- Steven Wright
---
please visit www.serpia.org
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From uymqlp502 at sneakemail.com  Thu Aug 30 21:06:36 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Thu, 30 Aug 2007 18:06:36 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <mailman.177.1188519810.28954.python-list@python.org>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<mailman.177.1188519810.28954.python-list@python.org>
Message-ID: <1188522396.732521.51300@r23g2000prd.googlegroups.com>


Ryan Ginstrom wrote:

> I tried using DBC for a time in C++ (using a library with a clever
> assembly-language hack). I personally found it neater having such code in
> unit tests, but obviously, it's a matter of preference.

I agree that it ultimately boils down to preference, but as I tried to
explain earlier, I don't
think that unit tests are equivalent to DBC (or, as I referred to it
earlier, "self-testing code").

Unit tests are not automatically executed when you run your
application. You need to write
the drivers and generate sample inputs to all the functions in your
application, which
can be very time-consuming. And if you think you can anticipate all
the weird internal data
that might come up in the execution of your application, then either
your application is very
simple or you are fooling yourself.

With self-testing code, on the other hand, all you need to do is to
get sample inputs to
your application (not internal inputs to functions) and run the entire
application. That is
much simpler and more comprehensive than unit testing.

Again, I recognize that it doesn't necessarily replace unit testing
completely. For one thing,
unit testing can test for specific outputs for specific inputs,
whereas you wouldn't want to
clutter your actual code with such specific cases. For example, a unit
test for a sorting
function could provide a specific input and test for a specific
output, but you probably
wouldn't want to clutter your code with such a case. The self-tests in
your code would be
more for general tests. PEP 316 provides an excellent of comprehensive
tests for a sorting
function. If you pass those tests, you can be sure your function
worked correctly.



From mcl.office at googlemail.com  Sun Aug 19 02:32:20 2007
From: mcl.office at googlemail.com (mosscliffe)
Date: Sat, 18 Aug 2007 23:32:20 -0700
Subject: Symbolic Link
In-Reply-To: <5ipbc3F3q94rmU1@mid.uni-berlin.de>
References: <1187475296.173269.263080@k79g2000hse.googlegroups.com>
	<5ipbc3F3q94rmU1@mid.uni-berlin.de>
Message-ID: <1187505140.524645.314920@d55g2000hsg.googlegroups.com>

On 18 Aug, 23:49, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> mosscliffe schrieb:
>
>
>
> > I am trying to create a link to a file, which I can then use in an
> > HTML page.
>
> > The system is Linux on a hosted web service, running python 2.3.
> > Other than that I have no knowledge of the system.
>
> > The link is created OK, but when I try to use it as filename for the
> > IMG TAG, it does not get displayed.  The page source of the created
> > page is pointing to the link as temp/test1.jpg
>
> > Any ideas ?
>
> > srcFile = "temp/test2.jpg"
>
> > linkFile = "temp/test1.jpg"
>
> > if os.path.islink(linkFile):
> >     print "Link Exists", nl
> >     pass
> > else:
> >     print "Making Link", nl
> >     os.symlink(srcFile, linkFile)
>
> > print '<BR><img src="%s">the image</IMG><BR><BR>' % linkFile
>
> > print '<img src="%s">the image</IMG>' % srcFile
>
> In what environment is that script running? If it's apache, it might be
> that the apache settings disallow for following links.
>
> Diez

It is Apache.

Can I create some override in the current directory.  I am afraid my
Apache skills are almost zero.

Thanks

Richard



From alberto.griggio at gmail.com  Thu Aug 23 05:33:34 2007
From: alberto.griggio at gmail.com (Alberto Griggio)
Date: Thu, 23 Aug 2007 11:33:34 +0200
Subject: python debugging under emacs?
References: <pan.2007.08.21.22.31.39.485712@datallegro.com>
Message-ID: <fajk5o$af9$1@sea.gmane.org>

> Is there a debugging mode in emacs that works well with python?
> 
> I tried gud, but it was giving me errors, so I thought I'd ask before I
> try to get it to work: Is there an emacs mode (perhaps gud) that'll give a
> view of the python source, and currenly executing line, the ability
> inspect datastructures, etc.?  You know, like a modern debugger?  :)
> 
> I also looked at ddd, but it was cranky too, and apparently hasn't seen a
> new release in years.
> 
> I'm really more of a vim person than an emacs person, but if emacs will
> do what I want, I'd happily use it - for this.  :)

You can try pydb (http://bashdb.sourceforge.net/pydb/), has a GUD interface
that in my experience works better than pdb...

HTH,
Alberto




From philippe.martin at att.net  Mon Aug 27 22:32:17 2007
From: philippe.martin at att.net (hg)
Date: Mon, 27 Aug 2007 19:32:17 -0700
Subject: SCF released to GPL
In-Reply-To: <zHLAi.102$7P7.54@newssvr19.news.prodigy.net>
References: <ZBnAi.21498$eY.43@newssvr13.news.prodigy.net>
	<46d29a6c$0$27404$ba4acef3@news.orange.fr>
	<zHLAi.102$7P7.54@newssvr19.news.prodigy.net>
Message-ID: <ROLAi.104$7P7.40@newssvr19.news.prodigy.net>

hg wrote:
> M?ta-MCI (MVP) wrote:
>> Salut !
>>
>> Le deuxi?me envoi aurait pu ?tre en fran?ais.
>> Cela aurait ?vit? le doublon, tout en maintenant le message.
>>
>> @+
>>
>> Michel Claveau
>>
> 
> ;-)
> 
> No:
> 1) The redundancy is due to the fact that I just moved to another 
> state/ISP and that ... for some reason, the initial post did not show 
> for quite some times.
> 
> 2) I'm desperately searching for the French NG from my client but cannot 
> find it ... any clue ? Maybe you can pass the message ?
> 
> hg
PS: I know this is not a python issue.
can someone out there using news.sf.sbcglobal.net see fr.comp.lang.python ?

could the name be different ?

Thanks,

hg


From zentraders at gmail.com  Sat Aug 11 15:37:36 2007
From: zentraders at gmail.com (Zentrader)
Date: Sat, 11 Aug 2007 12:37:36 -0700
Subject: Who told str() to round my int()'s!!!
In-Reply-To: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
Message-ID: <1186861056.323621.195570@e9g2000prf.googlegroups.com>

On Aug 11, 9:40 am, "Adam W." <AWasile... at gmail.com> wrote:
> After a fair amount of troubleshooting of why my lists were coming
> back a handful of digits short, and the last digit rounded off, I
> determined the str() function was to blame:
>
> >>> foonum
>
> 0.0071299720384678782
>
> >>> str(foonum)
> '0.00712997203847'
>
> Why in the world does str() have any business rounding my numbers, and
> how do I get around this?

If 15 digit precision is a concern, I would suggest that you us the
decimal class instead of floating points.  Floating point problems on
X86 machines are well documented.
http://docs.python.org/lib/module-decimal.html
http://pydoc.org/2.4.1/decimal.html
http://gmpy.sourceforge.net/



From a.schmolck at gmail.com  Sun Aug 12 05:53:09 2007
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: Sun, 12 Aug 2007 10:53:09 +0100
Subject: Fatest standard way to sum bytes (and their squares)?
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
Message-ID: <yfs643l84fu.fsf@gmail.com>

Erik Max Francis <max at alcyone.com> writes:

> For a file hashing system (finding similar files, rather than identical ones),
> I need to be able to efficiently and quickly sum the ordinals of the bytes of
> a file and their squares.  Because of the nature of the application, it's a
> requirement that I do it in Python, or only with standard library modules (if
> such facilities exist) that might assist.
>
> So far the fastest way I've found is using the `sum` builtin and generators::
>
> 	ordinalSum = sum(ord(x) for x in data)
> 	ordinalSumSquared = sum(ord(x)**2 for x in data)
>
> This is about twice as fast as an explicit loop, but since it's going to be
> processing massive amounts of data, the faster the better.  Are there any
> tricks I'm not thinking of, or perhaps helper functions in other modules that
> I'm not thinking of?

Is this any faster?

 ordSum, orsSumSq = (lambda c:c.real,c.imag)(sum(complex(ord(x),ord(x)<<1) 
                                                 for x in data))

'as


From bryan at redfedora.co.uk  Mon Aug  6 14:01:12 2007
From: bryan at redfedora.co.uk (Bryan Hepworth)
Date: Mon, 06 Aug 2007 19:01:12 +0100
Subject: Tkinter or wxpython?
In-Reply-To: <4866bea60708061043x34fb94edg8b675eb1608af9b1@mail.gmail.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>	<mailman.1550.1186099225.22759.python-list@python.org>	<1186410331.905174.21370@q3g2000prf.googlegroups.com>	<7xps204tin.fsf@ruckus.brouhaha.com>	<mailman.1677.1186412323.22759.python-list@python.org>	<7xlkcopu4r.fsf@ruckus.brouhaha.com>	<mailman.1680.1186416061.22759.python-list@python.org>	<7x3aywr4tc.fsf@ruckus.brouhaha.com>
	<4866bea60708061043x34fb94edg8b675eb1608af9b1@mail.gmail.com>
Message-ID: <46B761E8.8090306@redfedora.co.uk>

Chris Mellon wrote:
> On 06 Aug 2007 09:44:15 -0700, Paul Rubin
> <"http://phr.cx"@nospam.invalid> wrote:
>   
>> "Chris Mellon" <arkanes at gmail.com> writes:
>>     
>>>> Might or might not matter for the application, especially considering
>>>> that tkinter is part of the discussion.
>>>>         
>>> The point is that you have no option with the browser - even Tkinter
>>> has platform theming support now.
>>>       
>> Hmm, I don't know anything about that.  I'm taking the view that for a
>> lot of apps, the requirement is to just put some functionality on the
>> screen, with slick visual appearance having little value or even
>> negative value.
>>
>>     
>
> Define "functionality". From the rest of your posts, that seems to be
> limited to "press buttons" and "type small amounts of non-formatted
> text" on the interaction side and "display small amounts of simply
> formatted text" on the output side. I'm not denying that you can get
> by with this functionality in a large number of cases, but it's
> certainly not optimal in general. If it were, we'd all still be using
> VT100 terminals.
>
>   
>>> ...Gmail uses ajax instead of a page load when you start
>>> typing a reply,
>>>       
>> I see, the answer to what caused your problem is approximately "ajax
>> is evil", or alternatively, the gmail app attempts slickness with a
>> tool that doesn't support slickness that well.  OK, I can accept that
>> using browsers for slick interfaces has its problems, but the answer
>> (a lot of the time, not always) is to just decide you don't need
>> slickness.
>>
>>     
>
> What you're calling "slickness" is what other people call "usable".
> Obviously it could be done without the ajax, but you lose features and
> usability. It's slower, because it takes a full page load, and I lose
> the context of the discussion.
>
>   
>>>> File i/o and file system browsing are available from javascript if the
>>>> user grants permission.
>>>>         
>>> Which they won't (I don't even know how, from Firefox), so you can't
>>> rely on it working.
>>>       
>> The application javascript pops a dialog asking for permission and the
>> user clicks yes or no.  If you can get them to install a desktop app
>> (gah!!) then you can certainly get them to click yes in a browser.
>> The permission mechanism is admittedly browser dependent.
>>
>>     
>
> My out of the box firefox install simply denies the operation and
> raises a javascript error.
>
>   
>>> But not of anything else. I've often wanted to drag & drop a file onto
>>> the file upload box in gmail, for example.
>>>       
>> Well, ok, that's a slick feature that your app might need.  None of
>> mine have needed it so far.
>>
>>     
>>> How about something as simple as context menus?
>>>       
>> Unnecessary slickness for many apps.  I've never needed it.
>>
>>     
>
> How have you decided that you've never needed it? Have you ever worked
> with a UI designer or workflow expert? Or have you just never bothered
> to implement it and you never heard anything from your users? How
> closely have you worked with the users of your applications?
>
>   
>>>> Multiple windows are evil most of the time,
>>>>         
>>> Multiple windows are the common case on the mac. They're not rare on
>>> other platforms as well. The fact that your windows are constrained to
>>> the browser and can't be torn off is a large limitation. No toolbars,
>>> no palettes, no modal dialogs (except on IE, or if  you constrain them
>>> to the browser). Lots of unnecessary chrome on your extra windows, too
>>> (see below).
>>>       
>> You can get rid of the chrome with javascript, but the extra windows
>> are still usually evil and unnecessary.  Just because they get used a
>> lot doesn't change that.  A heck of a lot of deployed interfaces, web
>> or desktop, simply suck.
>>
>>     
>
> As phishing attacks become more common, browsing are restricting the
> ability to remove or modify chrome. Again, a good feature for a
> browser, not so much for an application platform.
>
>   
>>>>> More platforms to develop on and test with.
>>>>>           
>>>> Compared to a desktop app?  I don't think so.
>>>>         
>>> Did you ever try counting? X browsers * Y browser versions * Z
>>> platforms. There are javascript and CSS bugs and differences between
>>> all of these.
>>>       
>> If you can tell them to install a desktop app, you can alternatively
>> tell them what browser to use.  For example we use a complicated
>> firefox-only browser app where I work, that relies heavily on canvas
>> objects.  But if you write your application with straightforward html
>> you tend to have very few platform problems.
>>
>>     
>
> It depends on your target audience and deployment arena. The context
> is cross platform applications, so at least 2 browsers and at least 2
> platforms are required. Don't forget browser versioning, too - IE 5 is
> different than IE 6 is different than IE 7. Even "straightforward"
> HTML has non-trivial cross browser differences.
>
>   
>>> From my own professional experience, it's not any easier
>>> to account for browser differences than it is for platform
>>> differences. It's getting better as more people jump on the web
>>> bandwagon and CSS and JS abstraction libraries show up,
>>>       
>> I guess I see that stuff as mostly-evil and prefer straightforward
>> html.
>>
>>     
>
> You simply can't do much of anything beyond display text and basic
> crud with straightforward HTML without stying. If that is the sole
> limit of your UI needs, then bully for you but that's hardly the
> common case and I'd venture that you don't have the experience to
> support the rather sweeping claim you made.
>
>   
>>> I'm not talking about chrome and slickness. I'm talking about basic
>>> usability concerns like "will this work with a higher font size" and
>>> "will it reflow in a sensible way if I change the window size". The
>>> CSS box model works okay for text, it's not so good for widgets.
>>>       
>> I just haven't had this problem with HTML interfaces.  I've never even
>> used CSS, though that makes me a bit of a lamer.  An interface that
>> needs to fill the whole screen with widgets is probably too
>> complicated.
>>
>>     
>
> An application is not a book. Of course you fill the whole "screen"
> with widgets - your application is defined by the widgets that it has,
> and the amount of space those widgets take up is your screen space.
>
>   
>>> More than a few web apps end up writing their own layout engines in
>>> dynamic javascript. This is sad. While I'm talking about chrome, add
>>> "wasted screenspace due to browser chrome" to a limitation of web
>>> apps, again unless you write your own browser host. This is another
>>> example of a feature that makes a good browser (don't let arbitrary
>>> web pages mess with my web browser functionality) clashing with the
>>> desires of a good application (don't waste screen space with
>>> irrelevant functionality).
>>>       
>> I guess the term I'd use to describe all these effects is "slick" and
>> a heck of a lot of the time it's just not needed.  Anyway you can pop
>> a chromeless browser window with a simple javascript call.
>>
>>     
>>> Man, you should be in PR with the way you spin things. You can't
>>> implement anything except the most trivial of applications using only
>>> the simple, familiar web elements like HTML forms. Anything more
>>> complicated than that needs to be done with DHTML and probably AJAX,
>>> and those UI elements don't look anything like the familiar ones. You
>>> go in one breath from saying that you can implement dialogs in HTML to
>>> saying that the rich client is the *less* familiar of the interfaces?
>>>       
>> I don't see the contradiction--with HTML you have just a few widgets
>> that everyone understands and you get an interface that's almost
>> always self-explanatory.  Yes you could call those interfaces trivial,
>> but the little secret that I'm trying to convey is that very often,
>> trivial is all that's needed.
>>
>>     
>
> That's simply not true, and I don't think you can objectively justify
> it. Besides, you specifically claimed HTML dialogs as being a
> replacement for "real" ones, and that can't be done using trivial
> interfaces. It requires DHTML, sometimes ajax, and/or browser support.
>
>   
>>> If you'd said "if you're making something really simple that has
>>> limited rich UI or data entry needs, consider a web application
>>> instead" I wouldn't have posted. A web application is something you
>>> make because the deployment and access benefits outweigh the UI and
>>> integration limitations, not as your default "go to" whenever you
>>> create an application.
>>>       
>> Well, I could back off to somewhere between the two.  Like, "ask
>> yourself whether your application really needs a rich gui or complex
>> data entry features.  If you can get by with a simple HTML interface,
>> and a lot of the time you can, you'll probably have an easier time
>> doing it that way and that should be the default".
>>
>>     
>
> I would challenge the assumption that, starting from zero, it is less
> complicated to write a web application, much less a "pretend" web app
> using a local web server, than a desktop application using Tkinter
> (ick) or wxPython or pyQt. I would also challenge the assumption that
> 'a lot of the time' you can get away with a simple HTML interface, at
> least by my personal definition of 'get away with'. I've worked a lot
> with data entry people, where the actual requirements in terms of
> slickness and flash are quite small. But "basic html" simply does not
> fit the bill. There is a real cost in terms of how fast and how
> accurately they can enter data in this environment.
>
> Moreover, if you *don't* need global access or zero-deployment
> (zero-deployment is always nice but most environments where you can
> reasonably force a specific browser and version also have IT
> infrastructure), then you should ask yourself if forcing your
> application in the web app model (I haven't even touched on the whole
> stateless HTTP being mapped to a stateful environment issue, or the
> need to manage the local web server) actually buys you anything. I
> simply do not buy the claim that HTML interfaces are necessarily
> simpler in any but the most trivial of cases, and even in those
> super-trivial applications there are often hidden concerns that don't
> filter up to management.
>
>   
>>> I'd like an example you have of a desktop application that could have
>>> just as easily been a web application. Bonus points if it's not a CRUD
>>> screen, and double bonus if you don't just handwave away things like
>>> file browsing. Although there are benefits even for the crud screen -
>>> I've written screens and applications for data entry professionals and
>>> they almost always prefer the speed optimizations you can make in a
>>> client application.
>>>       
>> I guess I've written 4 or 5 nontrivial desktop gui apps and ZERO of
>> them had file browsing.  One of them did need access to the pc's
>> serial port, which means there had to be application code on the
>> desktop, but the gui could have been a browser (talking to an
>> application-embedded http server) if browsers were available in those
>> days.  Another one of them saved some state to a local file but it did
>> that without file browsing, and could have instead saved the state on
>> a remote server if it were written as a remote app.
>>
>>     
>
> Exactly how much time do you think using an HTML interface with an
> embedded server would have saved you, especially considering the
> careful care you have to take with access to the serial port? For the
> record, I've written over a dozen client applications, many of which I
> would consider trivial (but used features that would be expensive or
> impossible to implement in the browser) and probably twice that many
> web apps.
>
>   
>> I'm not saying file browsing is never needed, just that from
>> experimental observation, it's quite often not needed.
>>
>>     
>
> Plural of anecdote and all that. Make a survey of every application
> that you interact with and see how many of them need to interact with
> arbitrary files from the filesystem.
>
>   
>> Again, it all depends on what you're trying to do.  For data entry
>> stuff you probably want the data on a remote server anyway, and you
>> can do basic CRUD validation with fairly simple javascript.  Maybe
>> that departs from pure HTML but it's nothing like the ajax/dhtml
>> madness that causes the problems you've described.
>> --
>>     
>
> CRUD with javascript is something I actually have a lot of experience
> with. Deficiencies in the data entry UI have real consequences because
> you get invalid data and slow data entry speeds. The auto-completing
> combo-box, for example, is simply impossible in a browser without
> quite complicated (and slow) DHTML and is a huge boon for data entry.
>
> I'm not trying to claim that there are no benefits to web
> applications. But I often see people touting the web as a *superior
> application platform*, which is simply false, and as innately simpler
> to develop for, which is also false.
>   
I'm also in a similar predicament starting to look at Python for the 
first time.

I'd be curious to know peoples take on other GUI's like pygtk and pyqt 
for example to get a fuller picture. As a total newbie the list seems 
daunting so taking advantage of other peoples experiences seems like a 
good idea.

Bryan


From bj_666 at gmx.net  Wed Aug  1 02:31:34 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 1 Aug 2007 06:31:34 GMT
Subject: A way to re-organize a list
References: <1184857535.033057.49150@m3g2000hsh.googlegroups.com>
	<1185932029.235957.226720@e9g2000prf.googlegroups.com>
Message-ID: <5hanm6F3inuf2U3@mid.uni-berlin.de>

On Wed, 01 Aug 2007 01:33:49 +0000, beginner wrote:

> On Jul 19, 10:05 am, beginner <zyzhu2... at gmail.com> wrote:
>> Hi Everyone,
>>
>> I have a simple list reconstruction problem, but I don't really know
>> how to do it.
>>
>> I have a list that looks like this:
>>
>> l=[ ("A", "a", 1), ("A", "a", 2), ("A", "a", 3), ("A", "b", 1), ("A",
>> "b", 2), ("B", "a", 1), ("B", "b", 1)]
>>
>> What I want to do is to reorganize it in groups, first by the middle
>> element of the tuple, and then by the first element. I'd like the
>> output look like this:
>>
>> out=[
>>    [    #group by first element "A"
>>           [("A", "a", 1), ("A", "a", 2), ("A", "a", 3)], #group by
>> second element "a"
>>           [ ("A", "b", 1), ("A", "b", 2)], #group by second element
>> "b"
>>    ],
>>    [   #group by first element "B"
>>           [("B", "a", 1)],
>>           [("B", "b", 1)]
>>    ]
>> ]
>>
>> All the solutions I came up with are difficult to read and even harder
>> to go back and change, and I just feel are too complicated for such a
>> simple problem. I am wondering if anyone here has some insight.
>>
>> If there is a 'functional' way to do this, it would be even greater.
>>
>> Thanks,
>> Geoffrey
> 
> I guess I still don't quite get functional programming. Here is my
> imperitive way to do it in O(n).

I didn't try to follow it but are you sure about O(n)?  With the inner
loop going from 0 to `level` it looks suspiciously quadratic to me.  You
really should try to grasp the `itertools.groupby()` solution.

And the result of that script looks strange:

[[[[1, 2, 3, 4], [1, 2, 4, 5], [1, 2, 'A', 'B']]], [[[2, 2, 'A', 'C']]]]

Aren't the two top level elements wrapped in one list too much? 
Furthermore the test data doesn't contain an example where the first item
is the same but the second item is different.

> def group_items(source_list, f_list, target=[]):

Default arguments are evaluated *once* when the ``def`` is executed.  So
all calls to this function share the same list object bound to `target`. 
Call this function twice without an explicit `target` and you'll see the
problem.

Ciao,
	Marc 'BlackJack' Rintsch


From B.Ogryczak at gmail.com  Thu Aug 23 08:35:11 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: Thu, 23 Aug 2007 12:35:11 -0000
Subject: =?utf-8?q?Re:_sentance_containg_the_string_or_symbol_=CE=A9?=
In-Reply-To: <1187868007.012689.224290@z24g2000prh.googlegroups.com>
References: <1187868007.012689.224290@z24g2000prh.googlegroups.com>
Message-ID: <1187872511.419052.30590@x40g2000prg.googlegroups.com>

On 23 ago, 13:20, yadin <conra2... at yahoo.com> wrote:
> how can i print a sentance containg the string or symbol ? in python
> and also lambda?

Well, you can use this dictionary to find out its unicode code point:
from htmlentitydefs import name2codepoint
unichr(name2codepoint['Omega'])
u'\u03a9'
unichr(name2codepoint['Lambda'])
u'\u039b'

print u'this is upper case omega: \u03a9, and this is upper case
lambda: \u039b'

See http://www.digitalmediaminute.com/reference/entity/ for entity
names.



From brian at rkspeed-rugby.dk  Thu Aug  2 03:59:26 2007
From: brian at rkspeed-rugby.dk (Brian Elmegaard)
Date: Thu, 02 Aug 2007 06:59:26 -0100
Subject: Floats as keys in dict
References: <u1wenwq26.fsf@rkspeed-rugby.dk>
	<5hcthiF3ki7cjU1@mid.individual.net>
Message-ID: <ulkcuxt7l.fsf@rkspeed-rugby.dk>

greg <greg at cosc.canterbury.ac.nz> writes:

> Be careful with this. If you have two values that are
> very close together, but on different sides of a rounding
> boundary, they will end up as distinct keys even though
> they "should" be regarded as equal.

I don't think this is a big problem. It will only give me one more
node. 

Wouldn't the same be possible if I use bisect?

-- 
Brian (remove the sport for mail)
http://www.et.web.mek.dtu.dk/Staff/be/be.html
http://www.rugbyklubben-speed.dk


From michele.simionato at gmail.com  Sun Aug 26 13:40:28 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Sun, 26 Aug 2007 17:40:28 -0000
Subject: lisper learning python,
	... could you please comment my first python program?
In-Reply-To: <1188143768.742884.38520@r29g2000hsg.googlegroups.com>
References: <1188143768.742884.38520@r29g2000hsg.googlegroups.com>
Message-ID: <1188150028.716338.64390@57g2000hsv.googlegroups.com>

On Aug 26, 5:56 pm, neptundan... at gmail.com wrote:
> Hi,
>   to extend my skills, I am learning python. I have written small
> program which computes math expression like "1+2*sin(y^10)/cos(x*y)"
> and similar, so far only + - * / ^ sin con tan sqrt are supported. But
> my program is quite inextensible, I have to change the code to add new
> functions... Could some fellow experienced pythonista give me some
> tips how to make my program shorter, and more extensible?

I understand that you are doing this as a learning exercise. Still, I
would
recommend you to have a look at the shlex module in the standard
library
and to pyparsing. Looking at their source code should should give you
some
idea. BTW, since you are familiar with Lisp, I would recommend you
IPython
for a better interactive experience.

  Michele Simionato



From greg at cosc.canterbury.ac.nz  Wed Aug  1 22:19:59 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Thu, 02 Aug 2007 14:19:59 +1200
Subject: Floats as keys in dict
In-Reply-To: <u1wenwq26.fsf@rkspeed-rugby.dk>
References: <u1wenwq26.fsf@rkspeed-rugby.dk>
Message-ID: <5hcthiF3ki7cjU1@mid.individual.net>

Brian Elmegaard wrote:
> However, the dict keys are then floats and I have to round the values
> of new possible nodes in each step.

Be careful with this. If you have two values that are
very close together, but on different sides of a rounding
boundary, they will end up as distinct keys even though
they "should" be regarded as equal.

I don't think there's any way to use a dictionary for
this that works properly in all cases. Whatever scheme
you come up with for comparison and hashing will suffer
from this problem one way or another.

So, like Alex said, you need a different data structure.

--
Greg


From Brian.McCann at viziant.net  Fri Aug 24 12:02:28 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Fri, 24 Aug 2007 12:02:28 -0400
Subject: creating a tar file with python
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx><faktv8$8fs$1@sea.gmane.org><93066C069973ED448DC2BCEA9C44A7383BE2ED@efmailx><46CE4D3D.7020106@holdenweb.com><93066C069973ED448DC2BCEA9C44A7383BE2EE@efmailx><1187969070.3385.20.camel@dot.uniqsys.com>
	<0A8A92C4-3F3A-42C4-A6F5-770C5ADFB6E5@leafe.com>
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE2F0@efmailx>

I don't care if Steve Holden is the python God himself,
He's a rude, arrogant, vulgar human who shows his true level
of intellect by his use of profanity


And he goes one level lower stating he respects the python group
he spews his profanity to

He chose to respond to my question, no one dragged him out of bed
as hi so quickly pointed out. Re-read the thread!



If your three chums are indicative to the type of people in this group
Python is in sorry state

 

 

 
<mailto:brian.mccann at viziant.net> 
 

________________________________

From: python-list-bounces+brian.mccann=viziant.net at python.org on behalf of Ed Leafe
Sent: Fri 8/24/2007 11:33 AM
To: Carsten Haese
Cc: python-list at python.org
Subject: Re: creating a tar file with python



On Aug 24, 2007, at 11:24 AM, Carsten Haese wrote:

> You clearly have no idea who you're talking to. I suggest you 
> Google for
> '"Steve Holden" Python' to get a clue. Good luck finding any more help
> here.

        Even if it were Joe Nobody to whom he was directing those comments, 
it was *way* out of line. The fact that it was Steve only reinforces 
the cluelessness of the writer.

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com


--
http://mail.python.org/mailman/listinfo/python-list


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From lists at liquidtrust.org  Wed Aug 22 15:52:06 2007
From: lists at liquidtrust.org (Charlie)
Date: Wed, 22 Aug 2007 13:52:06 -0600
Subject: MsiLib
Message-ID: <20070822135206.9dm789grk08ccsgw@74.220.202.27>

Thanks for the help. That definitely gets me on the right track. I am  
having an issue though. I keep getting the error that  
MSIDBOPEN_READONLY is not defined.

Here is my code for testing. Am I missing something really obvious or  
is something just not working that should and my system is screwed up  
somewhere? Thanks.

import msilib

c = msilib.OpenDatabase('test.msi', MSIDBOPEN_READONLY)

view = c.OpenView("SELECT * FROM Registry")

record = view.Fetch()



From llasram at gmail.com  Wed Aug 22 19:06:51 2007
From: llasram at gmail.com (Marshall T. Vandegrift)
Date: Wed, 22 Aug 2007 19:06:51 -0400
Subject: Class destruction
References: <496954360708221117pd7465fr838a24b167a1dcdd@mail.gmail.com>
	<46CC8482.9040100@gmx.de>
Message-ID: <876437cgok.fsf@seneca.iss.local>

Nils Oliver Kr?ger <NO_Kroeger at gmx.de> writes:

> If you want to "reuse" the file, you will have to delete your classes
> instance explicitly using the del statement ... this will also call
> the destructor.

Sometimes, but not always.  The `del' statement simple removes the
reference to the instance and decrements its reference count.  The
__del__() routine for the instance still only gets called whenever the
object is actually garbage collected.  Furthermore, the Python Reference
Manual notes that:

    Circular references which are garbage are detected when the option
    cycle detector is enabled (it's on by default), but can only be
    cleaned up if there are no Python-level __del__() methods involved.
    [http://docs.python.org/ref/customization.html]

The proper way to handle the case presented by the OP is for the class
to expose a close()-like method and/or -- for use with Python 2.5 and
later -- implement the methods of the context manager protocol
[http://docs.python.org/ref/context-managers.html].  The following code
supports basic usage:

    def close(self):
        self._file.close()
        print "File closed"

    def __enter__(self):
        return self

    def __exit__(self, *exc_info):
        self.close()
        return False

Then the users of this class can freely do any of:

    f = fout(filename)
    ...
    f.close()

    with fout(filename) as f:
        ...

    with closing(fout(filename)) as f:
        ...

HTH,

-Marshall



From evan at yelp.com  Mon Aug 13 15:23:10 2007
From: evan at yelp.com (Evan Klitzke)
Date: Mon, 13 Aug 2007 12:23:10 -0700
Subject: Assignments and Variable Substitution
In-Reply-To: <f9q2qn$i4v$1@solaris.cc.vt.edu>
References: <f9q2qn$i4v$1@solaris.cc.vt.edu>
Message-ID: <cfb58d850708131223y37ccb61y465fc2f964ad05e4@mail.gmail.com>

On 8/13/07, brad <byte8bits at gmail.com> wrote:
> I'd like to do something like this:
>
> var = '123'
> %s = [], %var
>
> So that, in the end, var is '123' and an empty list is named '123' as
> well. The list assignments are created during a loop.

You can't assign a variable whose name is 123, but you can do this
sort of thing with setattr.

-- 
Evan Klitzke <evan at yelp.com>


From antroy at gmail.com  Tue Aug 21 05:46:27 2007
From: antroy at gmail.com (Ant)
Date: Tue, 21 Aug 2007 02:46:27 -0700
Subject: The folder a script is executed in
In-Reply-To: <1187688599.348139.297150@o80g2000hse.googlegroups.com>
References: <1187687436.476773.276550@22g2000hsm.googlegroups.com>
	<1187688437.358293.322460@22g2000hsm.googlegroups.com>
	<1187688599.348139.297150@o80g2000hse.googlegroups.com>
Message-ID: <1187689587.644109.14110@r34g2000hsd.googlegroups.com>

On Aug 21, 10:29 am, aine_ca... at yahoo.com wrote:
> On 21 Aug, 11:27, Ant <ant... at gmail.com> wrote:
>
>
>
> > On Aug 21, 10:10 am, aine_ca... at yahoo.com wrote:
> > ...
>
> > > myLocation = GetMyLocation()
> > > print myLocation
>
> > > >> C:/folder
>
> > Do you mean the folder containing the script? Or the current working
> > directory?
>
> > If the former, then look at os.path.split(sys.argv[0])[0]
> > If the latter, try something like: os.path.abspath(os.curdir)
>
> > --
> > Ant...
>
> >http://antroy.blogspot.com/
>
> The following code -
>
> import os
> import sys
> print os.getcwd() + "."
> print os.path.split(sys.argv[0])[0] + "."
>
> gives me -
>
> C:\Documents and Settings\me\Desktop.
> .

Which looks correct. You've executed the code in an interactive
session launched from a desktop shortcut at a guess. You won't get the
location of the script unless you are actually running a script :-).
Of course you'll get a current working directory however you are
running python.

--
Ant...

http://antroy.blogspot.com/





From rdm at rcblue.com  Tue Aug 14 01:49:30 2007
From: rdm at rcblue.com (Dick Moores)
Date: Mon, 13 Aug 2007 22:49:30 -0700
Subject: Binary, Hex, and Decimal string conversions
In-Reply-To: <496954360708130735s73a0fb02mbba68dad14f59193@mail.gmail.co
 m>
References: <496954360708111559s1cef4212pabd14e95b27435ea@mail.gmail.com>
	<C5FFAC23-F5DC-4112-A508-EC9BDF2FAB43@jedimindworks.com>
	<496954360708121620r4dd68ac9o430326ae8c8ae04d@mail.gmail.com>
	<649D1D6C-A44C-4D03-920D-489BBD108789@jedimindworks.com>
	<20070813034138.CA4C81E4012@bag.python.org>
	<496954360708130735s73a0fb02mbba68dad14f59193@mail.gmail.com>
Message-ID: <20070814054942.8EED81E4004@bag.python.org>

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From jyoung79 at kc.rr.com  Wed Aug  8 21:58:55 2007
From: jyoung79 at kc.rr.com (jay)
Date: Wed, 8 Aug 2007 20:58:55 -0500
Subject: Python mode
Message-ID: <AB33115C-2454-404B-854B-45C2306DF09D@kc.rr.com>

I'm starting to learn how to use emacs (on Mac OS 10.4)
and I found that you can load something called python-mode.el which  
looks like it can help when writing Python
code in emacs.  I'm hoping it can color python syntax as well as  
indent it correctly, etc.
My problems are:

1.  Where should you place the 'python-mode.el' file?  I downloaded a  
folder from 'sourceforge.net' that contains 4
files (python-mode.el, doctest-mode.el, pycomplete.el and  
pycomplete.py).  I couldn't find any installation
instructions anywhere.  Do I use all 4 files or just the one and where  
should it go?  One web-site said the 'python-
mode.el' file needed to be compiled before being moved to whereever it  
needs to go.  How does one compile these things?

2.  All the web-sites I found about installing this said I should  
change my .emacs file which should be located in
my home folder.  I can't find a .emacs file anywhere on my machine.   
The only thing close to it is a .emacs.d folder
which contains an autosave folder.  Does anyone know where this .emacs  
file is located?  Or do I need to manually create one?

Thanks for looking at my questions.

Jay
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From cvezvu at gmail.com  Thu Aug 16 11:05:13 2007
From: cvezvu at gmail.com (cvezvu at gmail.com)
Date: Thu, 16 Aug 2007 08:05:13 -0700
Subject: Guitars, amps, tabs and more
Message-ID: <1187276713.342841.226620@57g2000hsv.googlegroups.com>

Reviews of latest models of best guitars, fender, gibson, yamaha, and
many more, with pictures and prices.

http://pro-guitars.blogspot.com/



And if you want to win a free guitar go here
http://freeguitars.blogspot.com/



From ldo at geek-central.gen.new_zealand  Fri Aug 31 22:00:01 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 14:00:01 +1200
Subject: strings (dollar.cents) into floats
References: <mailman.140.1188483282.28954.python-list@python.org>
	<877incd20i.fsf@benfinney.id.au>
	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
	<1188575044.874256.42960@50g2000hsm.googlegroups.com>
Message-ID: <fbaguc$gnm$5@lust.ihug.co.nz>

In message <1188575044.874256.42960 at 50g2000hsm.googlegroups.com>,
sturlamolden wrote:

> There are fractions that can be exactly represented by floats that
> cannot be exactly represented by decimals.

There are no such.


From jmtulloss at gmail.com  Thu Aug  9 22:23:09 2007
From: jmtulloss at gmail.com (Justin T.)
Date: Fri, 10 Aug 2007 02:23:09 -0000
Subject: Threaded Design Question
In-Reply-To: <1186706363.947909.185460@e9g2000prf.googlegroups.com>
References: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
	<1186706363.947909.185460@e9g2000prf.googlegroups.com>
Message-ID: <1186712589.266128.285110@j4g2000prf.googlegroups.com>

On Aug 9, 5:39 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> On Aug 9, 7:25 pm, half.ital... at gmail.com wrote:
>
> > Hi all!  I'm implementing one of my first multithreaded apps, and have
> > gotten to a point where I think I'm going off track from a standard
> > idiom.  Wondering if anyone can point me in the right direction.
>
> > The script will run as a daemon and watch a given directory for new
> > files.  Once it determines that a file has finished moving into the
> > watch folder, it will kick off a process on one of the files.  Several
> > of these could be running at any given time up to a max number of
> > threads.
>
> > Here's how I have it designed so far.  The main thread starts a
> > Watch(threading.Thread) class that loops and searches a directory for
> > files.  It has been passed a Queue.Queue() object (watch_queue), and
> > as it finds new files in the watch folder, it adds the file name to
> > the queue.
>
> > The main thread then grabs an item off the watch_queue, and kicks off
> > processing on that file using another class Worker(threading.thread).
>
> > My problem is with communicating between the threads as to which files
> > are currently processing, or are already present in the watch_queue so
> > that the Watch thread does not continuously add unneeded files to the
> > watch_queue to be processed.  For example...Watch() finds a file to be
> > processed and adds it to the queue.  The main thread sees the file on
> > the queue and pops it off and begins processing.  Now the file has
> > been removed from the watch_queue, and Watch() thread has no way of
> > knowing that the other Worker() thread is processing it, and shouldn't
> > pick it up again.  So it will see the file as new and add it to the
> > queue again.  PS.. The file is deleted from the watch folder after it
> > has finished processing, so that's how i'll know which files to
> > process in the long term.
>
> I would suggest something like the following in the watch thread:
>
> seen_files = {}
>
> while True:
>         # look for new files
>         for name in os.listdir(folder):
>                 if name not in seen_files:
>                         process_queue.add(name)
>                 seen_files[name] = True
>
>         # forget any missing files and mark the others as not seen, ready for
> next time
>         seen_files = dict((name, False) for name, seen in seen_files.items()
> if seen)
>
>         time.sleep(1)

Hmm, this wouldn't work. It's not thread safe and the last line before
you sleep doesn't make any sense.



From BH at bh.com  Mon Aug 27 06:08:29 2007
From: BH at bh.com (BH)
Date: Mon, 27 Aug 2007 12:08:29 +0200
Subject: wx.grid and different Value Choice each line ?
Message-ID: <46d2a1f9$0$27412$ba4acef3@news.orange.fr>

Hi,

Hox can I have different value choice for each line in a grid with 
wxPython ?
I want to develop a small software for satisfaction surveys. Each line 
of the grid is a different question. Sometimes answers are the sames 
between two lines, but sometimes not.

Thx,

Bertrand


From sjmachin at lexicon.net  Fri Aug  3 19:30:01 2007
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 03 Aug 2007 16:30:01 -0700
Subject: xlrd question
In-Reply-To: <mailman.1567.1186154541.22759.python-list@python.org>
References: <mailman.1567.1186154541.22759.python-list@python.org>
Message-ID: <1186183801.441601.207030@g12g2000prg.googlegroups.com>

On Aug 4, 1:22 am, JYOUN... at kc.rr.com wrote:
> When running 'python setup.py install' to install items for xlrd to work, does anybody know
> what items are
> installed and where items are installed at on a Mac (OS 10.4)?  I'm assuming it mainly uses
> things out of the xlrd
> folder, but was curious if it copies files to other locations.
>

Background: I'm the xlrd author. I've never even sat down in front of
a Mac.

xlrd is a pure-Python package. The setup.py is close to vanilla.
Consequently (I'm guessing) the files should be installed on a Mac in
a folder called P/lib/site-packages/xlrd where P is the folder
containing the Python executable etc.

It's easy to find out exactly where. Result on my Windows box:

>>> import sys, xlrd; print sys.version; print xlrd.__file__
2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)]
C:\python25\lib\site-packages\xlrd\__init__.pyc

At some stage in the distant past, the hierarchy was somewhat flatter,
e.g.

>>> import sys, xlrd; print sys.version; print xlrd.__file__
2.1.3 (#35, Apr  8 2002, 17:47:50) [MSC 32 bit (Intel)]
C:\python21\xlrd\__init__.pyc

Script files like runxlrd.py should end up somewhere else, probably in
P/Scripts. If all else fails, use the shell find command.

BTW, I've never had anyone else ask where files are installed, on any
platform. What is your problem/concern?

Cheers,
John



From grante at visi.com  Fri Aug 24 17:08:33 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 24 Aug 2007 21:08:33 -0000
Subject: py2exe/distutils: how to include a tree of files?
References: <13cuhdr58m5one7@corp.supernews.com>
Message-ID: <13cui6h16a6v80d@corp.supernews.com>

On 2007-08-24, Grant Edwards <grante at visi.com> wrote:

> I'm packaging up a python program and need to include an entire
> directory tree in the distribution. the data_files=[] option to
> setup() is fine for individual files, but what do I do when I
> need to include an entire directory tree?

[...]

> There must be some py2exe documentation somewhere...

I can't even find anywhere that documents the 'data_files=[]'
option to setup().  It certainly doesn't show up when I do
help(setup) after importing setup from distutils.core.

-- 
Grant Edwards                   grante             Yow! What a COINCIDENCE!
                                  at               I'm an authorized "SNOOTS
                               visi.com            OF THE STARS" dealer!!


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Aug 14 15:57:29 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 14 Aug 2007 21:57:29 +0200
Subject: chmod g+ Equivalent
References: <1187042290.821786.178420@19g2000hsx.googlegroups.com>
	<5ic53dF3pi903U1@mid.individual.net>
	<1187045766.841230.148600@b79g2000hse.googlegroups.com>
Message-ID: <5iefp9F3o8k6fU1@mid.individual.net>

milan_sanremo wrote:
> The group ownership is set by chown,

Yes -- by storing a group's gid (group ID) in the file metadata. The
group ID is an int from /etc/group.

> but the group id (setgid bit) is set by chmod.

"group id" is not "setgid bit".

The "setgid bit" is one bit in the file metadata that tells the OS
to change the group ID based privileges for a process.

Regards,


Bj?rn

-- 
BOFH excuse #412:

Radial Telemetry Infiltration



From gagsl-py2 at yahoo.com.ar  Mon Aug 20 15:32:44 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Aug 2007 12:32:44 -0700
Subject: regular expression dictionary search
In-Reply-To: <1187624901.163499.157680@i13g2000prf.googlegroups.com>
References: <d6a0d8f10708181139m730d7aa6t1c9f6e624d6db9aa@mail.gmail.com>
	<mailman.25.1187624159.26576.python-list@python.org>
	<1187624901.163499.157680@i13g2000prf.googlegroups.com>
Message-ID: <1187638364.694573.53130@o80g2000hse.googlegroups.com>

On 20 ago, 12:48, mkPyVS <mikemine... at hotmail.com> wrote:
> On Aug 20, 9:35 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
>
> As a side note unless you are searching large buffers it is possibly
> more costly to compile into a re object then do a match with it as
> opposed to let the match object perform a compile a function level
> itself- if you use the class option above I would recommend storing
> the re.compiled versions of your patterns in the dictionary
> (everything is an object!) rather than the string repr and issuing a
> compile.

The re module already does exactly that - compiled expressions are
cached in a dictionary (but this fact appears to be undocumented, so
one should not rely heavily on this).
Anyway, if you have the regular expression object, it's better to call
its match method directly instead of using the module match function.
Using re.match(compiled_regex,...) is the worst case. In the posted
original code, replace re.match(regex, aWord) with regex.match(aWord).

--
Gabriel Genellina



From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Tue Aug 28 15:48:34 2007
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J. Fromberger)
Date: Tue, 28 Aug 2007 15:48:34 -0400
Subject: tempfile.mkstemp and os.fdopen
References: <1188323759.955043.317630@19g2000hsx.googlegroups.com>
Message-ID: <Michael.J.Fromberger-8FC07C.15483428082007@localhost>

In article <1188323759.955043.317630 at 19g2000hsx.googlegroups.com>,
 billiejoex <gnewsg at gmail.com> wrote:

> Hi there.
> I'm trying to generate a brand new file with a unique name by using
> tempfile.mkstemp().
> In conjunction I used os.fdopen() to get a wrapper around file
> properties (write & read methods, and so on...) but 'name' attribute
> does not contain the correct file name. Why?
> 
> >>> import os
> >>> import tempfile
> >>> fileno, name = tempfile.mkstemp(prefix='ftpd.', dir=os.getcwd())
> >>> fd = os.fdopen(fileno, 'wb')
> >>> fd.name
> <fdopen>
> 
> Moreover, I'd like to know if I'm doing fine. Does this approach avoid
> race conditions or other types of security problems?
> 
> Thanks in advance

In brief, since os.fdopen() only has access to the file descriptor, it 
does not have a convenient way to obtain the file's name.  However, you 
might also want to look at the TemporaryFile and NamedTemporaryFile 
classes in the tempfile module -- these expose a file-like API, 
including a .name attribute.

Assuming tempfile.mkstemp() is implemented properly, I think what you 
are doing should be sufficient to avoid the obvious file-creation race 
condition.

Cheers,
-M

-- 
Michael J. Fromberger             | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/  | Dartmouth College, Hanover, NH, USA


From __peter__ at web.de  Wed Aug 22 12:13:08 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 22 Aug 2007 18:13:08 +0200
Subject: Eval and raw string ??
References: <1187798806.029598.264740@q3g2000prf.googlegroups.com>
Message-ID: <fahnak$pn5$00$1@news.t-online.com>

Mark wrote:

> Eval() doesn't seem to recognize the r'string' format. Is there a way
> around this.
> Example:
> If I input: ---------> eval("r'C:\tklll\ndfd\bll'")
> I get the output:
> 
> Traceback (most recent call last):
>   File "<pyshell#3>", line 1, in <module>
>     eval("r'C:\tklll\ndfd\bll'")
>   File "<string>", line 1
>     r'C:      klll
>        ^
> SyntaxError: EOL while scanning single-quoted string

The string you are passing to eval already contains that newline. Use a raw
string instead:

>>> eval(r"r'C:\tklll\ndfd\bll'")
'C:\\tklll\\ndfd\\bll'

Peter


From http  Wed Aug 22 02:17:38 2007
From: http (Paul Rubin)
Date: 21 Aug 2007 23:17:38 -0700
Subject: for statement on empty iterable
References: <1187760507.951994.50310@q4g2000prc.googlegroups.com>
	<7xabsk3zgm.fsf@ruckus.brouhaha.com>
	<1187761270.713307.224570@i38g2000prf.googlegroups.com>
	<7xejhw15r9.fsf@ruckus.brouhaha.com>
	<1187761957.636211.107060@x40g2000prg.googlegroups.com>
Message-ID: <7xd4xgnldp.fsf@ruckus.brouhaha.com>

james_027 <cai.haibin at gmail.com> writes:
> Yes i am new to python :). I am sorry I should be clarify myself ...
> for example
> 
> l = ['j', 'a', 'm', 'e', 's']
> 
> for i in l
>  # i want to know the nth number of times it has loop thru or
> something like counter?

Oh I see.  You have to combine a couple of concepts but for this
example you'd say:

   name = 'james'     # 'l' looks too much like the digit 1
   for i,c in enumerate(name):
      print i, c
   print i

enumerate(name) generates the sequence 

   (0,'j'), (1,'a'), (2,'m'), (3,'e'), (4,'s')

and the above loop splits those tuples into two indexes i and c.

You should probably read the tutorial and work through the examples.
If you get something wrong with this basic stuff, your computer won't
explode or anything like that, so try stuff out.  Be more careful when
you start using library routines that can delete files ;).


From iapain at gmail.com  Fri Aug 31 12:36:52 2007
From: iapain at gmail.com (iapain)
Date: Fri, 31 Aug 2007 16:36:52 -0000
Subject: So what exactly is a complex number?
In-Reply-To: <mailman.215.1188576767.28954.python-list@python.org>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<1188576174.3479.9.camel@dot.uniqsys.com>
	<mailman.215.1188576767.28954.python-list@python.org>
Message-ID: <1188578212.572819.262260@l22g2000prc.googlegroups.com>

> > On Thu, 2007-08-30 at 20:11 -0500, Lamonte Harris wrote:
> > > Like in math where you put letters that represent numbers for place
> > > holders to try to find the answer type complex numbers?

You shouldnt worry about it in python, its pretty large to handle all
your calc.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 31 03:37:35 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 31 Aug 2007 09:37:35 +0200
Subject: list index()
In-Reply-To: <1188517164.844790.109150@q4g2000prc.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au>
	<1188492060.983148.90000@r34g2000hsd.googlegroups.com>
	<87fy20d2lt.fsf@benfinney.id.au>
	<1188517164.844790.109150@q4g2000prc.googlegroups.com>
Message-ID: <46d7c52f$0$30706$426a74cc@news.free.fr>

zzbbaadd at aol.com a ?crit :
> On Aug 30, 4:28 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>> zzbba... at aol.com writes:
>>> On Aug 30, 12:09 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
>>> wrote:
>>>> It's letting you know that the item isn't in the list. There's no
>>>> sensible return value from an "index" function in that condition.
>>> for str:
>>> find(      sub[, start[, end]])
>>> [...]
>>> Return -1 if sub is not found.
>>> -1 is used in other languages as well.
>> It is no more sensible there than in the 'str.find' method, which is a
>> historical wart.
> 
> One man's sensible is another man's insensible. For instance, some
> people feel -1 as a valid index into a list is sensible. Other's find
> it insensible.

Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> print "sensible"[-1]
e
 >>>



From indu_shreenath at yahoo.co.in  Thu Aug  9 03:50:52 2007
From: indu_shreenath at yahoo.co.in (indu_shreenath at yahoo.co.in)
Date: Thu, 09 Aug 2007 00:50:52 -0700
Subject: how to get output.
In-Reply-To: <5hvrhhF3m15c7U1@mid.uni-berlin.de>
References: <mailman.1777.1186641317.22759.python-list@python.org>
	<5hvrhhF3m15c7U1@mid.uni-berlin.de>
Message-ID: <1186645852.687961.323420@x35g2000prf.googlegroups.com>

Hey,

I did write the following:
but it does not work.

import subprocess as sp
try:
     = sp.Popen("DIR . /AD /B", stdout=sp.PIPE)
    result = p.communicate()[0]
    print result
 except:
     print "error"

This throws error.
DIR . /AD /B will list out only directories in the current directory.

Thanks,
Indu


On Aug 9, 11:46 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> indu_shreenath schrieb:
>
> > Hey,
> > I want to get the output of "DIR /AD /B" command to a varriable using
> > python. How can I do this?
>
> Using the subprocess-module.
>
> However, I'm not sure what DIR /AD /B does - but there are many
> functions in module os that might deliver what you want without invoking
> an external command.
>
> Diez




From kyosohma at gmail.com  Wed Aug 15 11:34:37 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 15 Aug 2007 08:34:37 -0700
Subject: Python Book Recommendations
In-Reply-To: <1187191803.845011.30400@x35g2000prf.googlegroups.com>
References: <d5506a9f0708141439v6a30d4c8l5092b30d269c1af4@mail.gmail.com>
	<Pine.LNX.4.44.0708141556370.5396-100000@violet.rahul.net>
	<1b31ae500708141638w77614014o6f382d0389bc69df@mail.gmail.com>
	<mailman.2015.1187189280.22759.python-list@python.org>
	<1187191803.845011.30400@x35g2000prf.googlegroups.com>
Message-ID: <1187192077.005818.174440@i13g2000prf.googlegroups.com>

On Aug 15, 10:30 am, Azazello <tyle... at jeld-wen.com> wrote:
> On Aug 15, 7:47 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
>
> > If I could have only one book, I would buy "Core Python, Second
> > Edition," by Wesley Chun.
>
> > For the record, I own:
> > Core Python, Second Edition (great)
> > wxPython in Action (haven't used yet)
> > Beginning Python (barely used)
> > Python in a Nutshell (use as a reference, although interactive python
> > dir() is more useful)
> > Dive into Python (great book)
> > Python Cookbook (great book)
> > Python Pocket Reference (not very useful)
> > Python Phrasebook (I love the Phrasebook series, but this isn't a
> > necessary book)
>
> I would like to add:
>
> Foundations of Python Network Programming
>
> I also use the Python Essential Reference.  (although all of the
> information is probably online it's nice to have a solid paper
> reference)

Depending on what you're doing, a book can actually be faster than
Google! Of course, a lot of these books don't cover any 3rd party
modules, so Google is still very handy.

Mike



From kay.schluehr at gmx.net  Sat Aug 11 08:20:23 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sat, 11 Aug 2007 05:20:23 -0700
Subject: Destruction of generator objects
In-Reply-To: <20070811140017.22a11f82@cube.tz.axivion.com>
References: <20070808002852.6228ae91@cube.tz.axivion.com>
	<1186613044.494852.306970@q75g2000hsh.googlegroups.com>
	<20070809011441.05d7dfb6@cube.tz.axivion.com>
	<1186819365.988117.232230@g4g2000hsf.googlegroups.com>
	<20070811121630.1b010eab@cube.tz.axivion.com>
	<1186831173.814193.235420@o61g2000hsh.googlegroups.com>
	<20070811140017.22a11f82@cube.tz.axivion.com>
Message-ID: <1186834823.389706.137980@r34g2000hsd.googlegroups.com>

On Aug 11, 2:00 pm, Stefan Bellon <sbel... at sbellon.de> wrote:
> On Sat, 11 Aug, Kay Schluehr wrote:
> > Honestly, I'd recommend wrapping the generator into a function object,
> > create the resource on construction ( or pass it ) and destroy it
> > implementing __del__.
>
> > def gen_value(self):
> >     while True:
> >         yield self.iter.next()
>
> > class GeneratorObj(object):
> >     def __init__(self, obj, gen):
> >         self.iter = make_iter(obj)
> >         self.gen  = gen(self)
>
> >     def __del__(self):
> >         destroy(self.iter)
>
> >     def next(self):
> >         return self.gen.next()
>
> Ok, I think there is an __iter__ missing in order to implement the
> iterator protocol, and I don't see why the generator cannot be inside
> the class itself.

Sure.

[...]

> But I do not see an output of "gen del" which makes me think that the
> destructor is not called, thus not releasing the resource. It seems I
> have not completely understood how generators work ...

But why shall the destructor be called? Your example does not indicate
that a ListGenerator object is somewhere destroyed neither explicitely
using del nor implicitely by destroying the scope it is living in.



From pyth0nc0d3r at gmail.com  Fri Aug 31 13:13:47 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Fri, 31 Aug 2007 11:13:47 -0600
Subject: So what exactly is a complex number?
In-Reply-To: <1188579019.141544.292210@50g2000hsm.googlegroups.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<1188576174.3479.9.camel@dot.uniqsys.com>
	<mailman.215.1188576767.28954.python-list@python.org>
	<1188579019.141544.292210@50g2000hsm.googlegroups.com>
Message-ID: <eb79828c0708311013j3fadb9ejda3c63ca6e8d7165@mail.gmail.com>

>Is English your native language? I'm having a hard time decoding your
question.
dont be an ass....

About the complex numbers I get what they are in python now.

Thanks Paul Boddie
-Lamonte.

On 8/31/07, Paul Boddie <paul at boddie.org.uk> wrote:
>
> On 31 Aug, 18:12, "Chris Mellon" <arka... at gmail.com> wrote:
> > On 8/31/07, Carsten Haese <cars... at uniqsys.com> wrote:
> >
> > > On Thu, 2007-08-30 at 20:11 -0500, Lamonte Harris wrote:
> > > > Like in math where you put letters that represent numbers for place
> > > > holders to try to find the answer type complex numbers?
> >
> > > Is English your native language? I'm having a hard time decoding your
> > > question.
> >
> > I'm pretty sure he was describing middle school algebra.
>
> Yes, I imagine that the "letters that represent numbers" is intended
> to refer to this:
>
> http://en.wikipedia.org/wiki/Elementary_algebra
>
> Whereas complex numbers are, of course, described here:
>
> http://en.wikipedia.org/wiki/Complex_number
>
> I hope the above resources are informative for the original inquirer.
>
> Paul
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From Kevin.Smith at sas.com  Wed Aug 15 15:55:35 2007
From: Kevin.Smith at sas.com (Kevin D. Smith)
Date: Wed, 15 Aug 2007 13:55:35 -0600
Subject: Move files/directories to Recycle Bin using standard Python libs
References: <f9va80$ciu$1@foggy.unx.sas.com>
	<mailman.2027.1187204570.22759.python-list@python.org>
Message-ID: <f9vlnk$ike$1@foggy.unx.sas.com>

On 2007-08-15 13:02:24 -0600, "Chris Mellon" <arkanes at gmail.com> said:
> Not easily. The recycle bin is part of the shell, and the shell api
> calls have very complicated struct parameters that are cumbersome to
> use correctly from ctypes. If you do the work to map the fileop
> structs to ctypes you can call the shell API file operation functions
> in shell32.dll. This assumes that "standard" for you is Python 2.5,
> which has ctypes. Otherwise you are out of luck.

Unfortunately, I need this to work on Python 2.4 as well...

-- 
Kevin D. Smith



From erniedude at gmail.com  Mon Aug  6 19:00:10 2007
From: erniedude at gmail.com (dude)
Date: Mon, 06 Aug 2007 23:00:10 -0000
Subject: maybe a popen question... or something else?
Message-ID: <1186441210.383700.301790@i13g2000prf.googlegroups.com>

Working on Windows XP
Say I have a Windows executable, foo.exe.
foo.exe is a command line tool that can take a number of different
arguments and perform corresponding actions.

I want to invoke foo.exe from a Python script (using whatever will
work best).  I want to continuously pass arguments to foo.exe in
between doing other stuff from within my Python script.

Some pseudo code:

processHandle = invoke("foo.exe") # what python module should "invoke"
be here?

doUnrelatedStuff()

processHandle.passArgs("arg1 arg2") # The same foo.exe I invoked above
gets these args for processing

doMoreUnrelatedStuff()

processHandle.passArgs("arg3 arg4") # The same foo.exe I invoked above
gets these args for processing

processHandle.close() # "foo.exe is destroyed"

Thanks for any help.



From jstroud at mbi.ucla.edu  Fri Aug  3 20:22:40 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 03 Aug 2007 17:22:40 -0700
Subject: How to pass a reference to the current module
Message-ID: <f90gsg$ek4$1@zinnia.noc.ucla.edu>

Hello All,

Say I have this code:


import AModule
import ModuleUser

ModuleUser.do_something_with(AModule, 'some_function_name')


But say the functions are defined in the same module that contains the 
above code. I can imagine this hack:


import AModule
import ModuleUser

ModuleUser.do_something_with(AModule.__name__, 'some_name')


Where AModule.__name__ could be substituted for __name__ under the 
proper circumstances. Then, I would have this code in ModuleUser:


import sys
def do_something_with(modname, funcname):
    afunction = sys.modules[modname].funcname
    [etc.]


Which is terribly ugly to me and makes for a pretty miserable API in my 
opinion, requiring the programmer to type underscores.


Basically, what I am trying to acomplish is to be able to do this in any 
arbitrary module or __main__:


funcname = determined_externally()
ModuleUser.do_something_with(AModule, funcname)


Ideally, it would be nice to leave out AModule if the functions were 
designed in the same namespace in which do_something_with is called.

Thanks in advance for any suggestions.

James


-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From tkpmep at hotmail.com  Fri Aug 17 11:02:57 2007
From: tkpmep at hotmail.com (tkpmep at hotmail.com)
Date: Fri, 17 Aug 2007 08:02:57 -0700
Subject: Downloading multiple csv files from a website
In-Reply-To: <1187358972.458872.241790@i13g2000prf.googlegroups.com>
References: <1187356117.474747.189980@g4g2000hsf.googlegroups.com>
	<1187358972.458872.241790@i13g2000prf.googlegroups.com>
Message-ID: <1187362977.390391.49170@d55g2000hsg.googlegroups.com>

Our systems administrator suggested that I try wget, a GNU utility
that is designed to pick up data. It might prove to be the easiest way
to get the data I want, and I am going to try that first.

Thanks again.

Thomas Philips




From aleax at mac.com  Mon Aug 27 00:05:17 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 26 Aug 2007 21:05:17 -0700
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csi2tn49esmc3@corp.supernews.com>
	<mailman.230.1187928865.32294.python-list@python.org>
	<13csqk47j0c56b0@corp.supernews.com>
	<CqSdnRl2x8928FPbnZ2dnUVZ_jSdnZ2d@speakeasy.net>
	<13ct7v3qn2v5206@corp.supernews.com>
	<mailman.238.1187948359.32294.python-list@python.org>
	<13d49lk6ue2as6d@corp.supernews.com>
	<13d4hutad1dq699@corp.supernews.com>
Message-ID: <1i3h176.kjfosu1ly2afyN%aleax@mac.com>

bambam <david at asdf.asdf> wrote:

> Is it safe to write
> 
> A = [x for x in A if x in U]
> 
> or is that undefined? I understand that the slice operation

It's perfectly safe and well-defined, as the assignment rebinds the LHS
name only AFTER the RHS list comprehension is done.


Alex


From steve at holdenweb.com  Tue Aug  7 08:53:47 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Aug 2007 08:53:47 -0400
Subject: distutils
In-Reply-To: <1186489676.042901.236140@w3g2000hsg.googlegroups.com>
References: <1186489676.042901.236140@w3g2000hsg.googlegroups.com>
Message-ID: <f99q0p$pgq$1@sea.gmane.org>

vedrandekovic at v-programs.com wrote:
> Hello again,
> 
> Is there any patch for python "distutils", for this
> 
>>>> from distutils import log,dir_util
> ImportError: cannot import name log
> 
What version of Python are you running with? It looks as though there 
may be something wrong with your installation if it's recent:

sholden at bigboy ~/Projects/Python
$ python
Python 2.5.1 (r251:54863, May 18 2007, 16:56:43)
[GCC 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> from distutils import log
 >>> import distutils.log
 >>>

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From tim at tdw.net  Sat Aug  4 12:10:31 2007
From: tim at tdw.net (Tim Williams)
Date: Sat, 4 Aug 2007 17:10:31 +0100
Subject: Problems with headers in email.message
In-Reply-To: <G80340210.8.1924.1@mxextra>
References: <G80340210.8.1924.1@mxextra>
Message-ID: <9afea2ac0708040910q5de8b667n3c7b70818d920d29@mail.gmail.com>

On 04/08/07, Slippy <slippy.lane at googlemail.com> wrote:
> Hi, python newbie, struggling to learn here. I'm trying to write a
> simple program which posts messages to my google group (via email).
> I'm using smtplib, email and email.message to build and send a
> message, but all the header attributes are appearing in the message
> body, so my messages are arriving with loads of junk in the body, no
> subject line and only the skinniest of headers. I know I'm doing
> something wrong, but I don't know what...
>
> Here's a simplification of what I'm doing....essentially, I've taken
> from what I've learned at
> http://codeidol.com/python/python3/Client-Side-Scripting/pymail-A-Console-Based-Email-Client/
>
> -------------Snip Here-------------Snip Here-------------Snip
> Here-------------
> import smtplib, email
> from email.message import Message
> m = Message( )
> m['From'] = 'Slippy <user at myemail.com>'
> m['To'] = 'mygroup at googlegroups.com'
> m['Subject'] = 'A Test Message'
> m.set_payload('This is a test email. Please ignore')
> s = smtplib.SMTP('smtp.myemail.com')
> failed =
> s.sendmail('user at myemail.com','mygroup at googlegroups.com',str(m))
> if failed:
>  print 'Message sending failed.'
> else:
>  print 'Message sent.'
> print 'Bye.'
> -------------Snip Here-------------Snip Here-------------Snip
> Here-------------
>
> Now, I get all the right responses, and the message sends ok. I go and
> check my inbox, and the message is there, but the From, To and Subject
> lines I created (as well as a preceding blank line and a "From nobody"
> line) are in the message body, followed by the body text.
>
> How do I assign values to the header?
>
> I'd appreciate any help anyone can give me with this.

Your script (as posted) works fine for me.

  I did need to change one import line to:  from email.Message import
Message (note the capitalization), but that was all - originally it
stopped the script dead, so it wasn't the cause of your problem.


-- 

Tim Williams


From jcd at sdf.lonestar.org  Mon Aug 27 18:23:11 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Mon, 27 Aug 2007 18:23:11 -0400
Subject: Biased random?
In-Reply-To: <13d6i72s8b2a3ad@corp.supernews.com>
References: <favd0c$fcu$1@ss408.t-com.hr>	<favgh4$1gm3$1@grapevine.csail.mit.edu>
	<13d6i72s8b2a3ad@corp.supernews.com>
Message-ID: <46D34ECF.8060106@sdf.lonestar.org>

I don't know if this is pythonic or not, but try something like this:

from math import log
from random import randint
def: skewedrandom(n):
    int(log(randrange(1,n), 2))

Play with your log to get the range you want

Cheers,
Cliff

Grant Edwards wrote:
> On 2007-08-27, Jun-geun Park <junkeun.park at gmail.com> wrote:
>
>   
>>> I have a list of items, and need to choose several elements
>>> from it, "almost random". The catch is that the elements from
>>> the beginning should have more chance of being selected than
>>> those at the end (how much more? I don't care how the
>>> "envelope" of probability looks like at this point - can be
>>> linear). I see that there are several functions in Python
>>> standard libraries for various distribution, but is there an
>>> easy pythonic way to make them do what I need?
>>>       
>
>   
>> That's weird. random.randint(a,b) will be enough for most
>> cases. Test your system to see the distribution is uniform
>> with something like:
>>     
>
> Except he wants a non-uniform distribution.
>
>   

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From SMERSH009X at gmail.com  Fri Aug  3 22:22:35 2007
From: SMERSH009X at gmail.com (SMERSH009)
Date: Sat, 04 Aug 2007 02:22:35 -0000
Subject: Email
In-Reply-To: <1186159660.264082.91830@j4g2000prf.googlegroups.com>
References: <1186076005.729346.327140@z24g2000prh.googlegroups.com>
	<46b2393f$0$27409$ba4acef3@news.orange.fr>
	<1186159660.264082.91830@j4g2000prf.googlegroups.com>
Message-ID: <1186194155.560881.183790@e16g2000pri.googlegroups.com>

On Aug 3, 9:47 am, Rohan <vodela.... at gmail.com> wrote:
> On Aug 2, 1:06 pm, Laurent Pointal <laurent.poin... at wanadoo.fr> wrote:
>
>
>
> > Rohan wrote:
> > > I was wondering if there could be an arrangement where a file could be
> > > attached and send as an email.
> > > For ex
> > > f = open(add.txt,w)
> > > f.write('python')
> > > f.close()
>
> > > Now I would like to send an email with add.txt as an attachment, is it
> > > possible ?
> > > some one give me a pointer towards this.
>
> > You can use iMailer as an example script to get parts:
>
> >http://nojhan.free.fr/article.php3?id_article=22
>
> > A+
>
> > Laurent.
>
> Laurent the link you gave me is in a language unknown to me if you
> have anything that expalains in english, then let me know.
> thanks

Did you try Google translate?  Here is the tiny url of the page you
wanted translated http://tinyurl.com/3xlcmc



From theller at ctypes.org  Wed Aug 15 13:21:23 2007
From: theller at ctypes.org (Thomas Heller)
Date: Wed, 15 Aug 2007 19:21:23 +0200
Subject: ming on win32 anyone ? [help a noob]
In-Reply-To: <%QCwi.14541$rr5.1213@newsfe1-win.ntli.net>
References: <%QCwi.14541$rr5.1213@newsfe1-win.ntli.net>
Message-ID: <f9vcmk$b7g$1@sea.gmane.org>

daz.diamond schrieb:
> hoping someone can help ...
> 
> how do I install ming (with python) on win32? have downloaded the
> tar.gz of ming-0.3.0 which doesn't have a handy self-installer, and
> I'm absolutely foxed as to what to do next ... the install
> instructions in the package seem to be linux oriented, which to me
> may as well be in greek
> 
> any clues much appreciated, thx
> 
> daz

Maybe you want this one:

http://www.develer.com/oss/GccWinBinaries

Quote from that page:

"""
Unofficial MinGW GCC binaries for Windows

This page contains a friendly installer for GCC 4.1.2 for Windows (native "mingw" win32 version).
It's an unofficial release, not promoted by the MinGW project. It features full Python integration.
"""



From gnewsg at gmail.com  Fri Aug 24 04:26:05 2007
From: gnewsg at gmail.com (billiejoex)
Date: Fri, 24 Aug 2007 01:26:05 -0700
Subject: tarfile module for version 2.2.3
In-Reply-To: <slrnfct3qq.jfo.apardon@rcpc42.vub.ac.be>
References: <slrnfct3qq.jfo.apardon@rcpc42.vub.ac.be>
Message-ID: <1187943965.116322.307790@x35g2000prf.googlegroups.com>

On 24 Ago, 09:57, Antoon Pardon <apar... at forel.vub.ac.be> wrote:
> I have to write a little program that has to run on a number of hosts.
> Versions of python range from 2.2.3. to 2.4.2.
>
> The easiest way to implement the necessary behaviour seems to me to
> use the tarfile module. However that was only introduced in 2.3
> I had a look in the code and at first sight couldn't find anything
> that would cause problems if I used this module with python 2.2.3.
>
> Could someone confirm that the tarmodule is compatible with python 2.2.
> I will try some tests myself but it would be nice to have confirmation
> from elsewhere.
>
> --
> Antoon Pardon

Try also the test suite (Lib/test/test_tarfile.py).



From nicksavill at googlemail.com  Tue Aug 28 05:02:35 2007
From: nicksavill at googlemail.com (nicksavill at googlemail.com)
Date: Tue, 28 Aug 2007 09:02:35 -0000
Subject: sorting a list of lists
In-Reply-To: <1188233798.684136.263640@22g2000hsm.googlegroups.com>
References: <1188233798.684136.263640@22g2000hsm.googlegroups.com>
Message-ID: <1188291755.083433.50610@d55g2000hsg.googlegroups.com>

Thanks guys,

"dirty hack" was what I needed to get a job done quickly.

Nick




From ldo at geek-central.gen.new_zealand  Sat Aug 18 00:48:14 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 18 Aug 2007 16:48:14 +1200
Subject: encrypting files + filestreams?
References: <1187186797.579680.206820@19g2000hsx.googlegroups.com>
Message-ID: <fa5ths$9im$1@lust.ihug.co.nz>

In message <1187186797.579680.206820 at 19g2000hsx.googlegroups.com>, per9000
wrote:

>     crptz = AES.new("my-secret_passwd")

You're using ECB mode. Never use ECB mode. At a minimum, use CBC mode.

Also, another common thing is, don't use the actual password to encrypt the
entire file. Instead, randomly generate a "session key" to use for the
actual encryption, and only use the password to encrypt that.

> def encrypt2(cryptor, infile, outfile):
>     """enly encrypt a few bytes at a time"""
> 
>     size = 512
>     bytes = infile.read(size)
> 
>     seek = 0
>     interval = 97
>     ctr = 0
> 
>     while len(bytes) == size:
>         seek += size
>         if ctr % interval == 0:
>             print '\r%15d bytes completed' %  (seek),
>         ctr += 1
> 
>         outfile.write(cryptor.encrypt(bytes))
>         # change to this to decrypt
>         # outfile.write(cryptor.decrypt(bytes))
>         bytes = infile.read(size)
> 
>     if len(bytes) != 0:
>         bytes += "#" * (size - len(bytes))
>         outfile.write(cryptor.encrypt(bytes))
>         seek += len(bytes)

Finally, it is recommended that you also compute and encrypt a cryptographic
hash of the plaintext. That way, you can check that still matches after
decryption, to guard against tampering.



From gherron at islandtraining.com  Wed Aug  1 23:50:53 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 01 Aug 2007 20:50:53 -0700
Subject: sending very large packets over the network
In-Reply-To: <9c8d48280708011555l5d1d439fu3c5fbcc61dc41f07@mail.gmail.com>
References: <9c8d48280708011555l5d1d439fu3c5fbcc61dc41f07@mail.gmail.com>
Message-ID: <46B1549D.3040108@islandtraining.com>

Walker Lindley wrote:
> OK, I'm back with another networking question. I'm trying to seend 
> large amounts of information over TCP (the length of data being given 
> to send() is on the order of 16000 characters in length). 
> Unfortunately on the receiving end, the packets appear to be 
> truncated. So I wrote some code that continuously tries to send bigger 
> and bigger packets until it fails and noticed that it never fails at 
> the same length. I'm not even sure these two things are related, but 
> is there some undocumented (or documented and I missed it) maximum 
> size for data you can pass to send()?
For ethernet connections the size is often about 1500.  But the size 
depends on the underlying protocol, and even if you know the underlying 
protocol along the full route, you can't rely on packets that are 
received being the same as those that are sent.

TCP/IP is a *stream* connection.  What you are guaranteed is this:  All 
the bytes that are sent from one end will be received eventually on the 
other end, in the proper order.  (Or failing that, you will receive an 
error notification.)  No guarantee is made about the packet sizes on 
either end, and you can't even rely on the packets being the same in 
number or length on the two ends.

Your send code can try sending a packet of any size, but it must be 
prepared to examine the number of bytes actually sent, and retry with 
the remainder in a loop until all bytes are sent.    Similarly your 
receiving code must loop around the receive accepting whatever sized 
packets makes it through the connection.

In many TCP/IP connections, it seems that the packets received are 
one-for-one with the packets sent, but relying on this *IS AN ERROR* 
that will bite you.  It fails to across the internet (sometimes) and 
when (at least some) wireless cards are involved.

You may be better off using a package that knows all this and handles it 
properly.  Modules asyncore and asynchat are one possibility.


Gary Herron
>
> the sample code is as follows
> #server
> import socket
>
> s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> s.bind(("", 2000))
> s.listen(0)
> sock, addrinfo = s.accept()
> for i in range(2 ** 16):
>  length = int(sock.recv(16))
>  print "excpecting data of length:", length
>  data = sock.recv(length)
>  print "received data of length:", len(data)
>  print
> s.close()
> sock.close()
>
> #client
> import socket
> import time
>
> s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> s.bind(("", 2001))
> s.connect(("localhost", 2000))
> for i in range(2 ** 16):
>  packet = "h" * i
>  s.send("%16d" % len(packet))
>  print "attempting to send data of length:", len(packet)
>  tmp = s.send(packet)
>  print "actually sent data of length:", tmp
>  print
>  time.sleep(.001)
> s.close()
>
> i just put them in different files and ran them from the command line. 
> Any help or suggestions would be greatly appreciated. Thanks.
>
>
> -Walker
>
> -- 
> This e-mail is licensed under the Creative Commons 
> Attribution-NoDerivs 2.5 License. To view a copy of this license, 
> visit http://creativecommons.org/licenses/by-nd/2.5/ or send a letter 
> to Creative Commons, 543 Howard Street, 5th Floor, San Francisco, 
> California, 94105, USA. 



From kyosohma at gmail.com  Fri Aug 31 17:28:43 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 31 Aug 2007 14:28:43 -0700
Subject: Is there a simple way to exit a while loop on keystroke?
In-Reply-To: <1188593722.696576.12390@y42g2000hsy.googlegroups.com>
References: <1188578827.809840.90100@r29g2000hsg.googlegroups.com>
	<1188581623.588967.78050@z24g2000prh.googlegroups.com>
	<1188583918.747640.300850@22g2000hsm.googlegroups.com>
	<1188593722.696576.12390@y42g2000hsy.googlegroups.com>
Message-ID: <1188595723.878736.186900@w3g2000hsg.googlegroups.com>

On Aug 31, 3:55 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> On Aug 31, 7:11 pm, gsxg <rha... at gmail.com> wrote:
>
> > Thanks,
> > The curses library doesn't look to helpful to me.
>
> And yet it is.
>
> --
> Arnaud

Maybe the OP is on Windows. The docs seem to indicate that the curses
module isn't for Windows (see excerpt below):

<quote>
While curses is most widely used in the Unix environment, versions are
available for DOS, OS/2, and possibly other systems as well. This
extension module is designed to match the API of ncurses, an open-
source curses library hosted on Linux and the BSD variants of Unix.
<unquote>
See also: http://docs.python.org/lib/module-curses.html

Oddly enough, I have it in my Windows distro, so it's rather
confusing. I've never used it, so I don't know if it plays nice on
Windows or not.

Mike



From deets at nospam.web.de  Sat Aug 18 18:49:29 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 19 Aug 2007 00:49:29 +0200
Subject: Symbolic Link
In-Reply-To: <1187475296.173269.263080@k79g2000hse.googlegroups.com>
References: <1187475296.173269.263080@k79g2000hse.googlegroups.com>
Message-ID: <5ipbc3F3q94rmU1@mid.uni-berlin.de>

mosscliffe schrieb:
> I am trying to create a link to a file, which I can then use in an
> HTML page.
> 
> The system is Linux on a hosted web service, running python 2.3.
> Other than that I have no knowledge of the system.
> 
> The link is created OK, but when I try to use it as filename for the
> IMG TAG, it does not get displayed.  The page source of the created
> page is pointing to the link as temp/test1.jpg
> 
> Any ideas ?
> 
> srcFile = "temp/test2.jpg"
> 
> linkFile = "temp/test1.jpg"
> 
> if os.path.islink(linkFile):
>     print "Link Exists", nl
>     pass
> else:
>     print "Making Link", nl
>     os.symlink(srcFile, linkFile)
> 
> print '<BR><img src="%s">the image</IMG><BR><BR>' % linkFile
> 
> print '<img src="%s">the image</IMG>' % srcFile

In what environment is that script running? If it's apache, it might be 
that the apache settings disallow for following links.

Diez


From steve at REMOVE.THIS.cybersource.com.au  Fri Aug  3 21:52:30 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 04 Aug 2007 11:52:30 +1000
Subject: How to pass a reference to the current module
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<f90im3$8ms$1@daisy.noc.ucla.edu>
	<mailman.1598.1186190388.22759.python-list@python.org>
	<f90l06$hic$2@zinnia.noc.ucla.edu>
Message-ID: <pan.2007.08.04.01.52.28.905857@REMOVE.THIS.cybersource.com.au>

On Fri, 03 Aug 2007 18:32:54 -0700, James Stroud wrote:

> Carsten Haese wrote:
>> This seems to confirm my suspicion that the do_something_with function
>> doesn't actually need a reference to the module, it only needs a
>> reference to the function to call.
>> 
>> Maybe your hurdle is how to obtain a reference to a function from the
>> current module when all you have is the name of the function in a
>> string. The answer to that would be "globals()[funcname]".
> 
> This is like a bad case of phone-tag. Please see my response to your 
> previous post for why this does not seem feasible to me.


I've read your previous post, and I don't understand why you consider it
unfeasible. The user provides a function name in a config file, which
gives you funcname as a string. You already know which module it comes
from (you didn't specify how, but all your examples show that). Carsten is
simply showing you how to get the function from the function name without
the nasty hack using sys._getframe. Why is in unfeasible?


-- 
Steven.



From bj_666 at gmx.net  Mon Aug 27 11:41:55 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 27 Aug 2007 15:41:55 GMT
Subject: How to free memory ( ie garbage collect) at run time with
	Python 2.5.1(windows)
References: <1188224306.863247.127890@50g2000hsm.googlegroups.com>
Message-ID: <5jg9m3F3snbajU1@mid.uni-berlin.de>

On Mon, 27 Aug 2007 07:18:26 -0700, rfv-370 wrote:

> have made the following small test:
> 
> Before starting my test my UsedPhysicalMemory(PF): 555Mb
> 
>>>>tf=range(0,10000000)    PF: 710Mb ( so 155Mb for my List)
>>>> tf=[0,1,2,3,4,5]             PF: 672Mb (Why? Why the remaining 117Mb is not freed?)
>>>> del tf                            PF: 672Mb (unused memory not freed)
> 
> So changing the list contents and/or deleting the list changes
> nothing...from a memory point of view.

>From the OS memory point of view to be precise.  Although here the integer
cache applies as Alex pointed out, in the general case memory might be
kept allocated by Python to be re-used later.  The Python allocator is
better suited for frequent allocation and deallocation of many small
objects than `malloc()` from the C standard library is.  And even a
`free()` in the C standard library doesn't guarantee that memory is given
back to the OS and reported as free memory again.

Ciao,
	Marc 'BlackJack' Rintsch


From nagle at animats.com  Wed Aug  1 01:08:50 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 01 Aug 2007 05:08:50 GMT
Subject: Scipy and Mcafee Site Advisor?
In-Reply-To: <BiUri.9638$9I3.2388@trndny06>
References: <BiUri.9638$9I3.2388@trndny06>
Message-ID: <CzUri.273$3x.40@newssvr25.news.prodigy.net>

David Lees wrote:
> I know scipy.org is legit and supplies widely used and useful python 
> packages.  Can someone explain why my McAfee SiteAdvisor software, flags 
>  scipy.org as a dangerous site?  Pardon my ignorance, but is this a 
> temporary error in the SiteAdvisor database or is there some privacy 
> consideration involved?  I am wondering if I should remove the 
> SiteAdvisor software, because it is not particularly reliable.
> 
> Puzzled.
> 
> david lees

SiteAdvisor says:

(http://www.siteadvisor.com/sites/scipy.org)

"After entering our e-mail address on this site, we received 81 e-mails per 
week. We received 2 e-mails which contained a virus."

The scipy list maintainer says they're going to add virus scanning to the
mailing list, which should, in time, get the site a better rating.

				John Nagle


From cjw at sympatico.ca  Tue Aug 21 13:59:11 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Tue, 21 Aug 2007 13:59:11 -0400
Subject: Regarding Classes
In-Reply-To: <eb79828c0708201342sdb7e572h9dde11f914e12436@mail.gmail.com>
References: <eb79828c0708201342sdb7e572h9dde11f914e12436@mail.gmail.com>
Message-ID: <faf95j$7sh$1@sea.gmane.org>

Lamonte Harris wrote:
> What is the main reason of "self" when it involves classes/functions
> 
"self" provides a semi-standard way of addressing the current instance 
of a class.  It is used in an instance's method.  It is not typically
used in functions.

Colin W.



From splifingate at gmail.com  Wed Aug  1 20:47:03 2007
From: splifingate at gmail.com (ah)
Date: Wed, 01 Aug 2007 20:47:03 -0400
Subject: What does this thread have to do with classical music,
In-Reply-To: <290720071853200863%erfc@caballista.org>
References: <7nnh7350b5h25ghocra72b23mmsnnkj8bh@4ax.com>
	<468e2d68$0$4831$8f2e0ebb@news.shared-secrets.com>
	<468e482b$0$97236$892e7fe2@authen.yellow.readfreenews.net>
	<4692df4a$0$4804$8f2e0ebb@news.shared-secrets.com>
	<469392cd$0$97226$892e7fe2@authen.yellow.readfreenews.net>
	<469445b3$0$4819$8f2e0ebb@news.shared-secrets.com>
	<4694e124$0$97214$892e7fe2@authen.yellow.readfreenews.net>
	<46957ef1$0$10227$8f2e0ebb@news.shared-secrets.com>
	<46963170$0$97261$892e7fe2@authen.yellow.readfreenews.net>
	<46981df7$0$12095$8f2e0ebb@news.shared-secrets.com>
	<46990784$0$97223$892e7fe2@authen.yellow.readfreenews.net>
	<4699297c$0$4706$4c368faf@roadrunner.com>
	<140720071431044860%erfc@caballista.org>
	<46a3a1a7$0$15115$8f2e0ebb@news.shared-secrets.com>
	<220720072148091069%erfc@caballista.org>
	<46a5385d$0$4832$8f2e0ebb@news.shared-secrets.com>
	<250720071834457296%erfc@caballista.org>
	<46aceaa5$0$13281$8f2e0ebb@news.shared-secrets.com>
	<290720071853200863%erfc@caballista.org>
Message-ID: <46b12539$0$4807$8f2e0ebb@news.shared-secrets.com>

Art Deco wrote:
> ah <splifingate at gmail.com> wrote:
>>Art Deco wrote:
>>> ah <splifingate at gmail.com> wrote:
>>>>Art Deco wrote:
>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>Art Deco wrote:
>>>>>>> Who wrote?
>>>>>>> 
>>>>>>> 
>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>> 
>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>> 
>>>>>>> How many more times will you be asking the same tired, lame questions,
>>>>>>> Tholen?
>>>>>>
>>>>>>Till 2056?
>>>>> 
>>>>> At that point, he will have made the Thirty Years Pset War look like
>>>>> 1967 in the Sinai.
>>>>
>>>>It must have been Hell to keep a garden during those times.
>>>>
>>>>Did they all eat jerky, or what?
>>> 
>>> Worse -- worm-laden hardtack.
>>
>>Luxury!
>>
>>Why, I remember when I was a lad . . . we used to watch the local churls
>>across the fences eating that well.
>>
>>We only had millings (and (occasionally) water) on Tuesdays and Fridays.
> 
> Grog and hardtack, life is good!

?Viva la basura!


From arnodel at googlemail.com  Thu Aug 30 15:52:59 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 30 Aug 2007 19:52:59 -0000
Subject: subclassing Python types
In-Reply-To: <mailman.165.1188503169.28954.python-list@python.org>
References: <1188500442.434722.157350@q5g2000prf.googlegroups.com>
	<46d717f5$0$30367$9b4e6d93@newsspool4.arcor-online.net>
	<1188501865.541186.272290@e9g2000prf.googlegroups.com>
	<mailman.165.1188503169.28954.python-list@python.org>
Message-ID: <1188503579.357874.275870@l22g2000prc.googlegroups.com>

On Aug 30, 8:44 pm, Robert Kern <robert.k... at gmail.com> wrote:
> zzbba... at aol.com wrote:
> > So it's:
> > class MyString(str):
> >    def __init__(self,strInput):
> >       self = strInput
>
> That doesn't quite work. Assigning to "self" only reassigns the name inside the
> function. It does not replace the object.
>
> Instead, call the .__init__() method on str.

That won't do much as strings are immutable objects...
As pointed out by Steve Holden and me, str.__new__ is the way.
--
Arnaud




From NO_Kroeger at gmx.de  Wed Aug 22 14:46:26 2007
From: NO_Kroeger at gmx.de (=?ISO-8859-1?Q?Nils_Oliver_Kr=F6ger?=)
Date: Wed, 22 Aug 2007 20:46:26 +0200
Subject: Class destruction
In-Reply-To: <496954360708221117pd7465fr838a24b167a1dcdd@mail.gmail.com>
References: <496954360708221117pd7465fr838a24b167a1dcdd@mail.gmail.com>
Message-ID: <46CC8482.9040100@gmx.de>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Robert Dailey schrieb:
> Hi,
> 
> I'm wondering where the most appropriate location is to cleanup class
> objects. For example, i have a file handle as an instance attribute in one
> of my classes and I need to call f.close() on it when the class object falls
> out of scope. Any ideas? I've tried __del__() but I don't remember this
> working for some reason. I might try it again later just to be positive.

__del__(self) is the perfectly right place for such cleanup ... it gets
called once your instance is either deleted explicitly by you or it's
handled by the garbage collector when there are no more references.

The possible problem why this did not work four you is, that the
destruction by the garbage collector cannot be predicted ... it may well
take some time. If you try to open the same file from another class
before yours gets cleaned you run into trouble.

If you want to "reuse" the file, you will have to delete your classes
instance explicitly using the del statement ... this will also call the
destructor.

The below code works fine:

    def __del__( self ):
        self._file.close()
        print "File closed"

Hope that helps ... Nils
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Version: GnuPG v1.4.6 (MingW32)
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iD8DBQFGzISBzvGJy8WEGTcRAiOwAJ94fJza4/GVQsFmbXwsP8kdvQjV5wCfQktw
F/zPJAw0ayjYe5MGxPR1YqI=
=4Hl6
-----END PGP SIGNATURE-----


From edloper at gradient.cis.upenn.edu  Thu Aug  9 01:40:38 2007
From: edloper at gradient.cis.upenn.edu (Edward Loper)
Date: Thu, 09 Aug 2007 00:40:38 -0500
Subject: mmm-mode, python-mode and doctest-mode?
Message-ID: <46BAA8D6.1050402@gradient.cis.upenn.edu>

> Anyone testing on xemacs?  I tried it, and C-c C-c sent xemacs into an
> infinite loop (apparantly).

It works fine for me in XEmacs 21.4 (patch 17) (i386-debian-linux, 
Mule).  If you could answer a few questions, it might help me track down 
the problem:

- What version of xemacs are you running?
- What version of doctest-mode are you running (0.4 or 0.5)?
- Are you using doctest-mode by itself, or in combination with another
   mode (via mmm-mode)?
- Does pressing control-g (possibly repeatedly) cause it to become
   unstuck?
- Does it always freeze when you hit C-c C-c?  Or does it depend on the
   contents of the buffer?  Does it freeze if you run it in an empty
   buffer?

You could try changing the value of doctest-python-command, to see if 
that helps -- "M-x customize-variable doctest-python-command".  Set it 
to the full path to a Python interpreter.

Thanks,
-Edward


From duncan.booth at invalid.invalid  Mon Aug 13 07:32:34 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 13 Aug 2007 11:32:34 GMT
Subject: decorators - more than just syntactic sugar
References: <46be005e$0$13866$ba620e4c@news.skynet.be>
	<mailman.1910.1187003498.22759.python-list@python.org>
Message-ID: <Xns998B7F01BADB6duncanbooth@127.0.0.1>

"BJ?rn Lindqvist" <bjourne at gmail.com> wrote:

> On 8/11/07, Helmut Jarausch <jarausch at skynet.be> wrote:
>> How can I find out the predefined decorators?
> 
> There are two in the standard library, @classmethod for declaring
> class methods and @staticmethod for declaring static methods. They are
> listed at the built ins page
> http://docs.python.org/dev/lib/built-in-funcs.html, unpedagogically
> not separated from ordinary functions.
> 
> 

There are at least two other decorators in the standard library:

 functools.wraps
 contextlib.contextmanager



From jjl at pobox.com  Sun Aug  5 13:52:28 2007
From: jjl at pobox.com (John J. Lee)
Date: Sun, 05 Aug 2007 17:52:28 GMT
Subject: Misleading wikipedia article on Python 3?
Message-ID: <87bqdlswbn.fsf@pobox.com>

I'm surprised to read this:

http://en.wikipedia.org/wiki/Python_3

"""Note that while there is no explicit requirement that code be able
to run unmodified in both versions, in practice it is quite likely for
most code. As of January 2007, it looks like most reasonable code
should run quite well under either branch."""


I haven't been following Python 3 development recently.  Have things
really changed that much?  Last time I looked, e.g. dict.items() no
longer returned a list.  Seems unlikely that most code will run on 2
and 3, in that case, and IIUC Guido has said all along that not much
code will run on both.

Maybe somebody who's following current Py3k goings-on can fix the
article if needed...


John


From guido at python.org  Fri Aug 31 13:17:05 2007
From: guido at python.org (Guido van Rossum)
Date: Fri, 31 Aug 2007 10:17:05 -0700
Subject: Python 3000 released as 3.0a1
Message-ID: <ca471dc20708311017j271e484dld449ec0ecdcc26ac@mail.gmail.com>

[Bcc: python-list at python.org]

The first Python 3000 release is out -- Python 3.0a1. Be the first one
on your block to download it!

   http://python.org/download/releases/3.0/

Excerpts:

Python 3000 (a.k.a. "Py3k", and released as Python 3.0) is a new
version of the language that is incompatible with the 2.x line of
releases. The language is mostly the same, but many details,
especially how built-in objects like dictionaries and strings work,
have changed considerably, and a lot of deprecated features have
finally been removed.

This is an ongoing project; the cleanup isn't expected to be complete
until 2008. In particular there are plans to reorganize the standard
library namespace.

The release plan is to have a series of alpha releases in 2007, beta
releases in 2008, and a final release in August 2008. The alpha
releases are primarily aimed at developers who want a sneak peek at
the new langauge, especially those folks who plan to port their code
to Python 3000. The hope is that by the time of the final release,
many 3rd party packages will already be available in a 3.0-compatible
form.

More links:

* Online docs: http://docs.python.org/dev/3.0/
* What's new: http://docs.python.org/dev/3.0/whatsnew/3.0.html

* Source tar ball: http://python.org/ftp/python/3.0/Python-3.0a1.tgz
* Windows MSI installer: http://python.org/ftp/python/3.0/python-3.0a1.msi

* PEP 3000: http://python.org/dev/peps/pep-3000/
* Issue tracker: http://bugs.python.org/
* Py3k dev list: http://mail.python.org/mailman/listinfo/python-3000/
* Conversion tool for Python 2.x code:
  http://svn.python.org/view/sandbox/trunk/2to3/

-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)


From rozelles at btinternet.com  Mon Aug  6 09:21:07 2007
From: rozelles at btinternet.com (Lincoln Rozelle)
Date: Mon, 6 Aug 2007 14:21:07 +0100
Subject: I need help speeding up an app that reads football scores
	andgenerates rankings
Message-ID: <2D88C16C-D4A3-44F6-8BFE-6ECE19FEBDA3@btinternet.com>

Hey Terry

I got your name from the following page:

http://mail.python.org/pipermail/python-list/2007-May/438521.html

I'm interested in producing a web-app for football games that runs in  
python.
When I talk about football, since I'm in Europe though, I mean soccer.

Which football do you mean?

Lincoln


Lincoln Rozelle
0131 221 9954
0781 313 2537
rozelles at btinternet.com
http://www.ilkindustries.com


This e-mail and any files transmitted with it are strictly  
confidential and intended only for use by the addressee/s unless  
otherwise indicated. If you are not the intended recipient any use,  
dissemination printing or copying is strictly prohibited and an  
infringement of copyright. If you have received this e-mail in error,  
please let us know.

http://www.linkedin.com/pub/2/210/206


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From kyosohma at gmail.com  Wed Aug 15 13:42:37 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 15 Aug 2007 10:42:37 -0700
Subject: Move files/directories to Recycle Bin using standard Python libs
In-Reply-To: <f9va80$ciu$1@foggy.unx.sas.com>
References: <f9va80$ciu$1@foggy.unx.sas.com>
Message-ID: <1187199757.774573.48940@q4g2000prc.googlegroups.com>

On Aug 15, 11:39 am, Kevin D. Smith <Kevin.Sm... at sas.com> wrote:
> I would like to move files and directories to the Recycle Bin on
> Windows from Python.  I have found some older articles describing how
> to do this, but they require additional packages to be installed.  I'm
> working on a plugin for an existing project and only have the standard
> library to work with.  Is there a way to use the Recycle Bin using
> standard Python?
>
> --
> Kevin D. Smith

Sounds like a Windows only thing to me, so you'll probably have to use
the win32 package regardless. See the following links:

http://mail.python.org/pipermail/python-list/2004-October/287638.html
http://tgolden.sc.sabren.com/python/win32_how_do_i/copy-a-file.html

Mike



From olsongt at verizon.net  Sat Aug 11 15:53:10 2007
From: olsongt at verizon.net (Grant Olson)
Date: Sat, 11 Aug 2007 15:53:10 -0400
Subject: ANN: Compyler 0.1
Message-ID: <000601c7dc51$3f0bfb40$ac01a8c0@johnyaya>

Compyler is a pre-alpha x86 native code compiler.  So far it can generate
primitive .pyds but not standalone executables.  It can run some simple test
cases including pystones (although there is a memory leak there).  And no, I
don't expect it'll ever be much faster than Cpython <wink>. I was primarily
interested in being able to distribute low-footprint standalone executables
written in python and code obfustication.

The basic approach taken by compyler is to transliterate python bytecode
into x86 assembly, instead of trying to generate assembly from the syntax
tree.

This is basically abandonware.  I haven't touched this in six months, but
did do a lot of up front work.  I basically wanted to release it before my
hardrive blows up in case anyone was looking for prior art.

The code also contains a version of pyasm that has some more patches and
features than the official distribution if you're one of pyasm's 3 users.

More info can be found at:

http://members.verizon.net/~olsongt/compyler/index.html


-Grant



From dfabrizio51 at gmail.com  Fri Aug 17 13:04:22 2007
From: dfabrizio51 at gmail.com (chewie54)
Date: Fri, 17 Aug 2007 17:04:22 -0000
Subject: best GUI library for vector drawing program
In-Reply-To: <fa4h5t$ort$1@gemini.csx.cam.ac.uk>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
	<fa4h5t$ort$1@gemini.csx.cam.ac.uk>
Message-ID: <1187370262.861439.259680@q3g2000prf.googlegroups.com>

On Aug 17, 12:08 pm, Jeremy Sanders <jeremy
+complangpyt... at jeremysanders.net> wrote:
> chewie54 wrote:
> > What would be the best cross-platform GUI library to use for a vector
> > based CAD program ( something like Visio on Windows )   WxWidgets,
> > Tk,   PyQt,  Java Swing,  Java SWT,????   I need the capibility to
> > draw and edit in a window that looks like a page of paper so WYSIWYG
> > is very important,  and I need to save the drawings in vector based
> > file formats like PS, EPS,  SVG, as well as image formats like jpg,
> > png, and gif.  Also, the images need to be high resolution so that
> > they can be pasted into various other programs in Windows OS,  and
> > Linux OS,  and the Mac OS.
>
> PyQt/Qt4 is capable of that (SVG export was added in Qt4.3).
>
> I have a graph drawing application based around it (Veusz).
>
> If you base everything around QPainter, you'll be able to write to any of
> those output formats (including eps and pdf), and bitmaps. Antialiasing is
> optional for bitmap formats.
>
> Jeremy
>
> --
> Jeremy Sandershttp://www.jeremysanders.net/

Jeremy,

I looked at your application, Veusz (it looks very nice),  and I see
you have binary distrubitions
for each os.  Is is difficult to build these binaries for each
system.  Could
you tell me how that is done?

Thanks,
Dan



From arkanes at gmail.com  Wed Aug  1 10:41:58 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 1 Aug 2007 09:41:58 -0500
Subject: wxPython version question
In-Reply-To: <1185970526.612299.277930@o61g2000hsh.googlegroups.com>
References: <1185970526.612299.277930@o61g2000hsh.googlegroups.com>
Message-ID: <4866bea60708010741j75e8fa9cve0ac201d848368ea@mail.gmail.com>

On 8/1/07, The Max <yattamax at gmail.com> wrote:
> Hi at all
>
>
> Hi have need of testing the version of wxPython in use .... at the
> moment I use wxversion, but I don't can find a method for testing
> version like this:
>
> if versionOfWX() <= 2.8:
>
> or
>
> if versionOfWX() >= 2.8:
>
> ( versioneOfWX is a pseudo-function  create for this example )
>
>
>
> Someone know a solution for this ?
>
>
>
> Thanks and sorry for my orrible english
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

help(wxversion) describes in some detail all the methods you need.


From steve at holdenweb.com  Fri Aug 31 15:30:20 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 15:30:20 -0400
Subject: So what exactly is a complex number?
In-Reply-To: <1188585591.3479.34.camel@dot.uniqsys.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<1188576174.3479.9.camel@dot.uniqsys.com>	<mailman.215.1188576767.28954.python-list@python.org>	<1188579019.141544.292210@50g2000hsm.googlegroups.com>	<eb79828c0708311013j3fadb9ejda3c63ca6e8d7165@mail.gmail.com>
	<1188585591.3479.34.camel@dot.uniqsys.com>
Message-ID: <fb9q8d$55a$3@sea.gmane.org>

Carsten Haese wrote:
> On Fri, 2007-08-31 at 11:13 -0600, Lamonte Harris wrote:
>>> Is English your native language? I'm having a hard time decoding your
>> question.
>> dont be an ass....
> 
> I'm sorry you took it this way. I was only trying to help. It won't
> happen again.
> 
For what it's worth, I too had difficulty parsing "Like in math where 
you put letters that represent numbers for place holders to try to find 
the answer type complex numbers?", so I suppose I must be an ass too.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From danb_83 at yahoo.com  Sat Aug  4 00:05:00 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: Fri, 03 Aug 2007 21:05:00 -0700
Subject: bias in random.normalvariate??
In-Reply-To: <1186198720.800007.38800@k79g2000hse.googlegroups.com>
References: <1186198720.800007.38800@k79g2000hse.googlegroups.com>
Message-ID: <1186200300.903625.317200@x40g2000prg.googlegroups.com>

On Aug 3, 10:38 pm, drewl... at gmail.com wrote:
> I'm a Python newbie and certainly no expert on statistics, but my wife
> was taking a statistics course this summer and to illustrate that
> sampling random numbers from a distribution and taking an average of
> the samples gives you a random number as the result (bigger sample ->
> smaller variance in the calculated random number, converging in on the
> mean of the original distribution), I threw together this program:
>
...
>
> I added the lo and high stuff to my test program out of fear that I
> was running into something funky in adding up 100 floating point
> numbers.   That would be more of a worry if the sample size was much
> bigger, but lo and high showed apparent bias quite aside from the
> calculation of the mean.
>
> Am I committing some other obvious statistical or Python blunder?
> e.g. Am I mis-understanding what random.normalvariate is supposed to
> do?

Doing some testing with mu=0, sigma=1, and n=1000000 gives me means of

-0.00096407536711885962
-0.0015179019121429708
+6.9223244807378563e-05
+0.0017483897464631625
-0.0011148444018505548
+0.0015367250480148183

There appears to be no consistent bias.



From steven.bethard at gmail.com  Fri Aug 31 13:09:54 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 31 Aug 2007 11:09:54 -0600
Subject: reload(sys)
In-Reply-To: <1188564816.430863.219560@w3g2000hsg.googlegroups.com>
References: <1188521143.421431.119100@l22g2000prc.googlegroups.com>
	<JK2dnSgydPkg8ErbnZ2dnUVZ_u3inZ2d@comcast.com>
	<1188564816.430863.219560@w3g2000hsg.googlegroups.com>
Message-ID: <f8GdnZ-6HbH-1kXbnZ2dnUVZ_s3inZ2d@comcast.com>

S?nmez Kartal wrote:
> On 31 A ustos, 04:24, Steven Bethard <steven.beth... at gmail.com> wrote:
>> S?nmez Kartal wrote:
>>> I've had an encoding issue and solved it by
>>> "sys.setdefaultencoding('utf-8')"...
>>> My first try wasn't successful since setdefaultencoding is not named
>>> when I imported sys module. After, I import sys module, I needed to
>>> write "reload(sys)" also.
>>> I wonder why we need to call "reload(sys)" to get setdefaultencoding
>>> named?
>> sys.setdefaultencoding is purposely deleted from the sys module after
>> it's loaded because you really shouldn't be using it. The reload() call
>> restores the deleted attribute.
>>
>> If you'd like a less brittle solution to your encoding issue, explain
>> what the issue was, and people here can probably help you find a better
>> solution.
>>
>> STeVe
> 
> I was using the XMLBuilder(xmlbuilder.py). I'm writing XML files as
> "f.write(str(xml))". At execution of that line, it gives error with
> description, configure your default encoding...

Could you post the actual traceback you're getting?

STeVe


From jefishman at gmail.com  Mon Aug  6 16:14:39 2007
From: jefishman at gmail.com (anethema)
Date: Mon, 06 Aug 2007 13:14:39 -0700
Subject: udp, datagram sockets
In-Reply-To: <mailman.1691.1186428498.22759.python-list@python.org>
References: <1186416225.769753.307110@o61g2000hsh.googlegroups.com>
	<mailman.1691.1186428498.22759.python-list@python.org>
Message-ID: <1186431279.714122.316530@j4g2000prf.googlegroups.com>

On Aug 6, 1:27 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> On Mon, 2007-08-06 at 09:03 -0700, 7stud wrote:
> > server:
> > ------------------
> > import socket
> > import sys
>
> > s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
> > s.bind(("", 7777))
> > [...]
> >         #Send messages back to client:
> >         total_sent = 0
> >         while total_sent < len(message):
> >             print "debug: send while loop"
>
> >             size_sent = s.sendto(message[total_sent:], ("localhost",
> > 7777) )
> >             total_sent += size_sent
>
> >             print "debug:", total_sent, len(message)
>
> I don't think that sending the datagram to port 7777 on localhost sends
> the message back to the client. I'm guessing the server is sending the
> message back to itself, which throws it into the infinite feedback loop
> you're experiencing.
>
> HTH,
>
> --
> Carsten Haesehttp://informixdb.sourceforge.net

Yes, you want to use the socket.recvfrom() method, store the address,
and send the response to that address.  Your code is indeed repeatedly
sending itself the received message.

You want to change
> >             data  = s.recv(1024)
to
            data, recv_addr = s.recvfrom(1024)

and
> >             size_sent = s.sendto(message[total_sent:], ("localhost",
> > 7777) )
to
            size_sent = s.sendto(message[total_sent:], recv_addr)

However, your client closes immediately after sending all its data, so
it will never receive that message.



From python at jayloden.com  Wed Aug  1 00:22:29 2007
From: python at jayloden.com (Jay Loden)
Date: Wed, 01 Aug 2007 00:22:29 -0400
Subject: Any way to monitor windows network connection?
In-Reply-To: <1185939997.135825.310080@z24g2000prh.googlegroups.com>
References: <1185939997.135825.310080@z24g2000prh.googlegroups.com>
Message-ID: <46B00A85.4030004@jayloden.com>

momobear wrote:
> hi, Is there any way to show me detailed listings of all TCP and UDP
> endpoints in my microsoft windows XP in python way?
> thanks.

Not sure if it's exactly what you're looking for, but this might be of use as a starting point at least: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/392572


From bbxx789_05ss at yahoo.com  Thu Aug  9 05:16:52 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Thu, 09 Aug 2007 02:16:52 -0700
Subject: wxPython before MainLoop
In-Reply-To: <13bl9a75laqcm70@corp.supernews.com>
References: <13bl9a75laqcm70@corp.supernews.com>
Message-ID: <1186651012.889801.320910@q75g2000hsh.googlegroups.com>

I reorganized my Thread class a little bit:

------------
class MyThread(threading.Thread):
    def __init__(self, a_frame):
        threading.Thread.__init__(self)
        self.frame_obj = a_frame

    def run(self):
        result = self.long_slow_init()

        wx.CallAfter(self.frame_obj.receive_result, result)
        #CallAfter() calls the specified function with the specified
argument
        #when the next pause in execution occurs in this thread.

    def long_slow_init(self):
        print "starting long_slow_init()..."
        time.sleep(6)
        result = 20.5
        return result
--------------



From gigs at hi.t-com.hr  Wed Aug 29 17:11:53 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Wed, 29 Aug 2007 23:11:53 +0200
Subject: cgi
In-Reply-To: <fb4n33$pvd$1@ss408.t-com.hr>
References: <fb4a57$ojf$1@ss408.t-com.hr>	<46d5c01b$0$36438$4fafbaef@reader5.news.tin.it>	<fb4gpa$bb0$1@ss408.t-com.hr>
	<46d5daa7$0$36441$4fafbaef@reader5.news.tin.it>
	<fb4n33$pvd$1@ss408.t-com.hr>
Message-ID: <fb4neq$r03$1@ss408.t-com.hr>

Gigs_ wrote:
> Fabio Z Tessitore wrote:
>> Are you sure your script is in the right dir?
>>
>> On my home computer, php script will work in /var/www but my python 
>> script need an other dir to work properly (i don't remember which now 
>> ;-))
>>
>> bye
>>
> i think that it is in right dir because other script in same dir work.
> dir is: cgi-bin


sorry...................



for waisting your time,
somehow in html page in form i forgot to put right script addr



thx anyway


work now


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Aug 13 04:09:54 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 13 Aug 2007 10:09:54 +0200
Subject: Module imports during object instantiation
In-Reply-To: <1186888682.860619.258610@19g2000hsx.googlegroups.com>
References: <mailman.1845.1186783217.22759.python-list@python.org>
	<f9io6j$p80$1@daisy.noc.ucla.edu>
	<1186888682.860619.258610@19g2000hsx.googlegroups.com>
Message-ID: <46c011b5$0$417$426a74cc@news.free.fr>

Ritesh Raj Sarraf a ?crit :
> On Aug 11, 3:17 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
>> You do realize your import statement will only be called for nt and dos
>> systems don't you?
>>
> 
> Yes. I would like to load a Windows Python Module (which is, say a
> specific implementation for Windows only) in such a condition where I
> find that the platform is Dos/NT.
> 
> Loading it globally doesn't make sense because when from the same
> class an object is created on a non-windows platfom, it would be
> waste. It would either ImportError or else just load the module and
> never use it.
> 
> As per my understanding __init__ is executed only once during object
> creation. For such situations (that I've explained above), I think
> __init__() is the correct place to put imports.


Nope.

The initializer will be called *each time* you instanciate the class. 
And nothing prevents client code from calling it explicitelly as many 
times as it wants  - ok, this would be rather strange, but this is still 
technically possible. What I mean that you have no assurance about the 
number of times an initializer will be called.


wrt/ your problem, remember that top-level code is executed when the 
module is loaded (either as a main program or as an imported module). 
The canonical solution to os-specific imports is to handle them at the 
top-level:

if os.name == 'posix:
   from some_posix_module import get_colors
elif os.name in ['nt', 'dos']:
   from some_nt_module import get_windows_color as get_colors
else:
   get_colors = lambda: None # or any other sensible default value...

class SomeClass(object):
   def __init__(self, *args, **kw):
     self.colors = get_colors()


From winter at biotec.tu-dresden.de  Tue Aug 21 15:00:05 2007
From: winter at biotec.tu-dresden.de (Christof Winter)
Date: Tue, 21 Aug 2007 21:00:05 +0200
Subject: How to optimise this code?
In-Reply-To: <mailman.68.1187711977.32294.python-list@python.org>
References: <mailman.68.1187711977.32294.python-list@python.org>
Message-ID: <46CB3635.7050705@biotec.tu-dresden.de>

David N Montgomery wrote:
> class testCase:
>     def __init__(self, tc):
>         if tc == 1:self.testCase1()
>         if tc == 2:self.testCase2()
>         if tc == 3:self.testCase3()
>         if tc == 4:self.testCase4()
>         if tc == 5:self.testCase5()
>         if tc == 6:self.testCase6()
> 
>     def testCase1(self):
>         print "tc1"
> 
>     def testCase2(self):
>         print "tc2"
> 
>     def testCase3(self):
>         print "tc3"
> 
>     def testCase4(self):
>         print "tc4"
> 
>     def testCase5(self):
>         print "tc5"
> 
>     def testCase6(self):
>         print "tc6"
> 
> 
>     def testCaseX(self):
>         print "tcX"
> 
> totalNumberOfTestCases = 6
> x = 0
> while x <= totalNumberOfTestCases:
>     x += 1
>     testCase(x)
> 
> 
> This template code is working, but I envisage having 100+ test cases and
> am concerned about my useage of if statements. I would be grateful for
> any pointers as to how I can run all tests cases, regardless of how
> many, in a more efficient manner.
> 
> Thank you in advance.

To get rid of the if statements, replace __init__ function with:

     def __init__(self, tc):
         functionToCall = eval("self.testCase%s" % tc)
         functionToCall()

HTH,

Chris


From aahz at pythoncraft.com  Sat Aug 11 17:28:12 2007
From: aahz at pythoncraft.com (Aahz)
Date: 11 Aug 2007 14:28:12 -0700
Subject: Augmented assignment (was Re: Something in the function tutorial
	confused me.)
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<bAjvi.47120$wv5.1434653@phobos.telenet-ops.be>
	<f9khib$kvq$1@panix3.panix.com>
	<semvi.47351$Wo7.893986@phobos.telenet-ops.be>
Message-ID: <f9l9lc$c15$1@panix3.panix.com>

In article <semvi.47351$Wo7.893986 at phobos.telenet-ops.be>,
Roel Schroeven  <rschroev_nospam_ml at fastmail.fm> wrote:
>
>I used to interpret the target in 'The target is only evaluated once' 
>more like an L-value in C/C++. That's not correct, of course, but I 
>didn't understand exactly how wrong it was until now.

It's true almost everywhere except augmented assignment.  Augmented
assignment is a prime example of the compromises one needs to make in
adding features.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"And if that makes me an elitist...I couldn't be happier."  --JMS


From grante at visi.com  Wed Aug 29 09:18:39 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 29 Aug 2007 13:18:39 -0000
Subject: Gmane's been quiet ...
References: <mailman.88.1188343014.28954.python-list@python.org>
	<1i3l2k9.1j3tdgr1iz19yeN%raims@dot.com>
	<13d9l0f1i2erdc6@corp.supernews.com>
	<1i3lsqu.10ti61g1fs47osN%raims@dot.com>
	<mailman.97.1188384559.28954.python-list@python.org>
Message-ID: <13dashf69pebi6e@corp.supernews.com>

On 2007-08-29, Steve Holden <steve at holdenweb.com> wrote:
> Lawrence Oluyede wrote:
>> Grant Edwards <grante at visi.com> wrote:
>>> Posting that were made to mailing lists via gmane?
>> 
>> That, I do not know
>> 
> Given that I have now read a reply to my post-via-gmane on gmane before 
> seeing the original post appear there I shall assume they've been having 
> some sort of issue.

New articles are showing up on gmane's NNTP server now, though
the one posting I made via that server yesterday appears to
have been lost.

-- 
Grant Edwards                   grante             Yow! MERYL STREEP is my
                                  at               obstetrician!
                               visi.com            


From arkanes at gmail.com  Wed Aug  8 13:03:09 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 8 Aug 2007 12:03:09 -0500
Subject: Tkinter or wxpython?
In-Reply-To: <46B9F09B.2060903@codebykevin.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
	<7x7io8r6na.fsf@ruckus.brouhaha.com> <hgamo4-p2m.ln1@lairds.us>
	<46B9DE7B.3050909@codebykevin.com>
	<mailman.1750.1186587557.22759.python-list@python.org>
	<46B9F09B.2060903@codebykevin.com>
Message-ID: <4866bea60708081003j4e8343a9s3fe2ff2fb3d3f55a@mail.gmail.com>

On 8/8/07, Kevin Walzer <kw at codebykevin.com> wrote:
> Chris Mellon wrote:
> > On 8/8/07, Kevin Walzer <kw at codebykevin.com> wrote:
>
> > Using Tile, of course, loses you the first major benefit of Tk - that
> > it's already included in the standard library. So in this sense it's
> > still "ugly old school look and feel" vs "no external dependencies",
> > which is the swing decision for many people. People who prefer the Tk
> > API, of course, will be happy to use Tile.
>
> Tile has been implemented in the Tk core starting with version 8.5,
> still somewhere between alpha and beta stage. Once 8.5 is out, and
> Python is configured to build against Tk 8.5 (instead of 8.4), it should
> Just Work.
> >
> > Also, while you can get (mostly) native *look*, the feel is absent.
> > Unless I'm very uninformed, Tile is a theming engine only, and doesn't
> > implement platform conventions with regard to behavior (the "feel"
> > part of look and feel).
>
> What do you mean here? Things like keyboard accelerators, menu
> placement, and so on? Those things are already natively implemented by
> Tk, and the developer just needs to invoke them. Sometimes some
> conditional code is required for stuff like keyboard accelerators (the
> "tk windowingsytem" command is useful for this), but again, it should
> Just Work.
>
> Or am I missing something?
>

There's conventions for shortcuts and they vary by platform. For
example, home/end do different things on a mac vs on windows.
Scrollbars interact differently, and menu pulldowns operate
differently. To my knowledge, while Tile can replicate the *look* of
these things, it does not help with the interaction.

People often say "look and feel" when they actually just mean look.
It's something that I try to bring up when I hear "look and feel"
being applied to purely visual skinning tools.

Don't think I'm singling out Tk, Gtk has exactly the same problem -
you can make the buttons look native, but it doesn't adjust the
behavior.


From steve at holdenweb.com  Fri Aug 10 08:19:33 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Aug 2007 08:19:33 -0400
Subject: Smoother Lines in Turtle Graphics
In-Reply-To: <f9hhtt$jta$1@gemini.csx.cam.ac.uk>
References: <1186703789.695265.52390@e9g2000prf.googlegroups.com>	<5i2tnaF3mgsofU1@mid.uni-berlin.de>	<1186744055.367994.61850@g12g2000prg.googlegroups.com>
	<f9hhtt$jta$1@gemini.csx.cam.ac.uk>
Message-ID: <f9hl4h$7cq$2@sea.gmane.org>

Jeremy Sanders wrote:
> Ant wrote:
> 
>> Python: Batteries and Turtles included!
> 
> I didn't know that! It looks like turtle is based on Tk, which doesn't have
> antialiasing yet (see http://wiki.tcl.tk/10101 ), so it can't really be
> made nice and smooth (unless you could somehow use tkzinc/tkpath to draw
> with).
> 
> I suppose turtle wouldn't be that hard to reimplement it to use Qt/Gtk
> instead.
> 
Doing that would make it less useful, though, since the primary value of 
turtle is to provide something that (sort of) works fro the standard 
library without adding further batteries.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From __peter__ at web.de  Thu Aug  9 04:21:39 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 09 Aug 2007 10:21:39 +0200
Subject: how to get output.
References: <mailman.1777.1186641317.22759.python-list@python.org>
	<5hvrhhF3m15c7U1@mid.uni-berlin.de>
	<1186645852.687961.323420@x35g2000prf.googlegroups.com>
	<1186646135.742185.5280@x35g2000prf.googlegroups.com>
Message-ID: <f9eiqj$cv2$00$1@news.t-online.com>

 indu_shreenath at yahoo.co.in wrote:

> I corrected a typ below.
> 
> On Aug 9, 12:50 pm, indu_shreen... at yahoo.co.in wrote:
>> Hey,
>>
>> I did write the following:
>> but it does not work.
>>
>> import subprocess as sp
>> try:
>>     p = sp.Popen("DIR . /AD /B", stdout=sp.PIPE)
>>     result = p.communicate()[0]
>>     print result
>>  except:
>>      print "error"
>>
>> This throws error.
>> DIR . /AD /B will list out only directories in the current directory.

try:
    ...
except:
    print "error"

is a really bad idea because it hides any meaningful and therefore valuable
information about the error.

IIRC the "dir" command is internal to the dos shell and therefore has to be
called indirectly. The actual command is "cmd", not "dir":

[following snippet found at
http://www.python-forum.de/viewtopic.php?p=73048&sid=13808229538bd52de4ef75c32cf67856]

>>> import subprocess 
>>> args = ["cmd", "/C", "dir", "J:\\", "/O", "/AD", "/B"] 
>>> process = subprocess.Popen(args, stdout = subprocess.PIPE, stderr =
subprocess.STDOUT) 
>>> print process.stdout.read() 

If you just want a list of subdirectories, here's a better approach:

>>> def directories(folder):
...     return os.walk(folder).next()[1]
>>> directories(".")
[snip list of subdirectories of cwd]

Peter


From ladynikon at gmail.com  Fri Aug  3 11:46:56 2007
From: ladynikon at gmail.com (Danyelle Gragsone)
Date: Fri, 3 Aug 2007 11:46:56 -0400
Subject: Eclipse/PyDev question.
In-Reply-To: <bfc796de0708030832m16ac29a8se60f84f45cd50bf@mail.gmail.com>
References: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>
	<1186153259.372809.230110@d30g2000prg.googlegroups.com>
	<1186153503.806195.225560@g4g2000hsf.googlegroups.com>
	<bfc796de0708030832m16ac29a8se60f84f45cd50bf@mail.gmail.com>
Message-ID: <59f9c5160708030846j5bb2e275u8db95474519b00fe@mail.gmail.com>

I wonder how long before they come out with a python version of
eclipse.  I know there is a C/C++ now.

Danyelle


From jergosh at wp.pl  Sun Aug  5 07:09:46 2007
From: jergosh at wp.pl (=?UTF-8?B?R3J6ZWdvcnogU8WCb2Rrb3dpY3o=?=)
Date: Sun, 05 Aug 2007 13:09:46 +0200
Subject: A question on plugin design
Message-ID: <46B5AFFA.3030301@wp.pl>

I'm working on my little project (an IM client) which I wanted to 
support plugins. My idea was that the core program would by itself do 
virtually nothing but manage plugins and all functionality would be 
provided by the plugins themselves (including protocol handling and UI. 
My first attempt was to check a directory for *.py files, execfile() 
them and rely on them to call a method to register a plugin object. This 
approach led to some conundrums and I discarded the it as bad design. My 
second take was to __import__() from each plugin file the plugin object 
and append it to a list of all plugins. But, this way I have to put 
imports into the __init__() of the plugin object or else they have no 
effect. Is this a valid approach? I'm starting to think that such 
problems are again symptoms of poor design.

I'd also be grateful for pointers to a well designed Pythonic plugin 
architecture but I'd much prefer a small project with a simple API.

TIA,
Greg Slodkowicz


From rodrigo.cr at gmail.com  Tue Aug 28 10:36:50 2007
From: rodrigo.cr at gmail.com (rodrigo)
Date: Tue, 28 Aug 2007 14:36:50 -0000
Subject: Check for dict key existence, and modify it in one step.
Message-ID: <1188311810.226363.295500@w3g2000hsg.googlegroups.com>

Im using this construct a lot:

if dict.has_key(whatever):
    dict[whatever] += delta
else:
    dict[whatever] = 1

sometimes even nested:

if dict.has_key(whatever):
    if dict[whatever].has_key(someother):
        dict[whatever][someother] += delta
    else:
        dict[whatever][someother] = 1
else:
    dict[whatever]={}
    dict[whatever][someother] = 1

there must be a more compact, readable and less redundant way to do
this, no?

Thanks,

Rodrigo



From larry.bates at websafe.com  Thu Aug  2 14:11:51 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 02 Aug 2007 13:11:51 -0500
Subject: File access
In-Reply-To: <1186072898.405831.105670@e16g2000pri.googlegroups.com>
References: <1186072898.405831.105670@e16g2000pri.googlegroups.com>
Message-ID: <sKqdnXSO5-L-gy_bnZ2dnUVZ_ubinZ2d@comcast.com>

JD wrote:
> Hi,
> 
> What I am trying to do is to run a subprocess on another machine using
> subprocess.Popen, this subprocess contuinue writing something into a
> file when it is runing.
> 
> After submit this subprocess, I tried to open the file and readlines()
> in the loop (with a delay) in the loop) when the subprocess was
> runing.
> 
> The problem is I could not get anything untill the subprocess
> finished.
> 
> I also tried to run another python programm when the subprocess is
> runing, I could get what I want.
> 
> Does anyone know why? Thanks!
> 
> JD
> 

I believe you are approaching this incorrectly.  You should probably be using a
socket server/socket client to communicate between these two.  Or perhaps you
could use a multi-user database table.  Writing/reading to files from two
different workstations and expecting them to by synchronized most likely won't work.

-Larry


From rhamph at gmail.com  Thu Aug 16 15:21:24 2007
From: rhamph at gmail.com (Rhamphoryncus)
Date: Thu, 16 Aug 2007 19:21:24 -0000
Subject: Idea for joined() builtin
Message-ID: <1187292084.077352.235340@i38g2000prf.googlegroups.com>

I know similar things have been argued before, but little things (like
the joined name implying a copy) can make a big difference.  That and
I'm providing a simple implementation that works right now, so you
don't have to wait for it to ever become a builtin. ;)

>>> joined([], [[1,2,3], [4,5,6]])
[1, 2, 3, 4, 5, 6]
>>> joined(' ', ['hello', 'world'])
'hello world'

def joined(sep, iterable):
    if hasattr(sep, 'join'):
        return sep.join(iterable)  # string-like interface
    else:
        output = type(sep)()  # Hopefully an empty container
        for i in iterable:
            output.extend(i)  # list-like interface
            output.extend(sep)
        else:
            if sep:
                del output[-len(sep):]
        return output

A little commentary on the intended usage.  There are three common
ways to "combine" objects:

The first is adding numbers together.  This may be accomplished with a
+b or sum([a, b]).  All values affect the output, but their
individuality is lost; you cannot extract the original values[1].

The second is concatenation.  This is usually done with list.extend,
''.join(), or with my joined function.  It can also be done with a+b,
but the performance is substantially worse if done repeatedly.  All
values affect the output and most of their individuality is retained;
given the original lengths of the subsequences, you can extract them
from the combined form.

The third is the "or" operation of a set or integer.  This is done
with a|b.  The values usually have some effect on the output, but as
redundant entries are removed, they lose a significant part of their
individuality.

The important thing to realize is that all of these different ways of
"combining" objects has different conceptual behaviour and different
performance characteristics.  Get them confused or attempt to over-
generalize and you will be bitten.


[1] Math/crypto has some exceptions.  Stop mentally poking holes in my
argument. :)

--
Adam Olsen, aka Rhamphoryncus



From asma61 at dsl.pipex.com  Fri Aug 31 16:15:10 2007
From: asma61 at dsl.pipex.com (DaveM)
Date: Fri, 31 Aug 2007 21:15:10 +0100
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<1188497498.3468.60.camel@dot.uniqsys.com>
	<mailman.188.1188546300.28954.python-list@python.org>
	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
	<1188551958.728836.137370@x35g2000prf.googlegroups.com>
	<fOadnfwlCJbQfErbnZ2dnUVZ_jCdnZ2d@speakeasy.net>
Message-ID: <6ftgd35rd1g4mddqg2f44d7svd4r85ev17@4ax.com>

On Fri, 31 Aug 2007 02:37:15 -0700, Erik Max Francis <max at alcyone.com>
wrote:

>_Troll_ and _frolic_ aren't pronounced with the same "o" sound in any 
>accent I've ever heard of.  

You've never heard an English accent then.

>Which you pronounce _boat_ and _bot_ the same way, too?

No - but I would pronounce "lever" and "fever" the same way, if that helps.

DaveM


From larry.bates at websafe.com  Tue Aug 28 12:18:52 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 28 Aug 2007 11:18:52 -0500
Subject: Getting subprocesses to be hidden on Windows
In-Reply-To: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
References: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
Message-ID: <YtCdnYoSetVu10nbnZ2dnUVZ_oDinZ2d@comcast.com>

geoffbache wrote:
> Hi,
> 
> As part of my efforts to write a test tool that copes with GUIs
> nicely, I'm trying to establish how I can start a GUI process on
> Windows that will not bring up the window. So I try to hide the window
> as follows:
> 
> info = subprocess.STARTUPINFO()
> info.dwFlags |= subprocess.STARTF_USESHOWWINDOW
> info.wShowWindow = subprocess.SW_HIDE
> 
> proc = subprocess.Popen(..., startupinfo=info)
> 
> This works, in a way, but doesn't work recursively. I.e. if the
> started process itself starts a window, that second window will not be
> hidden. This even applies to dialog boxes within the application. So
> instead of a lot of windows popping up I now get a lot of disembodied
> dialogs appearing, which is a slight improvement but not much.
> 
> Also, certain processes (e.g. tkdiff) seem to ignore the directive to
> be hidden altogether.
> 
> This is dead easy on UNIX with virtual displays like Xvfb. Can someone
> shed any light if it's possible on Windows from python?
> 
> Regards,
> Geoff Bache
> 
While I'm not entirely sure I understand what you want, I think you can 
accomplish it by using win32CreateProcess instead of subprocess.  You can run 
the application minimized or perhaps in a REALLY small window.  If you have 
modal dialog boxes, I don't think you can do anything as they don't run in the 
parent windows frame but rather outside (I could be wrong about this).

-Larry


From ldo at geek-central.gen.new_zealand  Thu Aug 30 20:57:09 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 31 Aug 2007 12:57:09 +1200
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<46d674c2$0$417$426a34cc@news.free.fr>	<1188496588.750629.208100@g4g2000hsf.googlegroups.com>	<mailman.154.1188497511.28954.python-list@python.org>
	<1188498073.997168.282420@q5g2000prf.googlegroups.com>
	<mailman.158.1188499243.28954.python-list@python.org>
Message-ID: <fb7osg$jb7$2@lust.ihug.co.nz>

In message <mailman.158.1188499243.28954.python-list at python.org>, Steve
Holden wrote:

> But why would you want to ignore built-in support like "value in dict"?

Because a function can be passed as a value in its own right, a built-in
construct cannot.


From zentraders at gmail.com  Tue Aug 14 18:54:47 2007
From: zentraders at gmail.com (Zentrader)
Date: Tue, 14 Aug 2007 15:54:47 -0700
Subject: IDLE path browser not recognizing my PYTHONPATH
In-Reply-To: <46C17651.6090407@v.loewis.de>
References: <1187071523.150365.125590@x40g2000prg.googlegroups.com>
	<46C17651.6090407@v.loewis.de>
Message-ID: <1187132087.474387.71660@q4g2000prc.googlegroups.com>

On Aug 14, 2:30 am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > I set PYTHONPATH to /home/me/bin in bash.bashrc, however the IDLE path
> > browser is not recognizing this.  Not sure why.
>
> > Grateful for any insight.
>
> The file "bash.bashrc" has no relevance. If you meant to set the
> variable every time you start bash, put it into ".bashrc", in your
> home directory. If that still doesn't work, type "env" before starting
> idle, and inspect its output.
>
> Regards,
> Martin

You also have to export, so to add to your existing PYTHONPATH, you
would add something like this to ~/.bashrc
export PYTHONPATH="${PYTHONPATH}:/home/me/bin/"



From sjmachin at lexicon.net  Mon Aug  6 18:45:25 2007
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 06 Aug 2007 15:45:25 -0700
Subject: xlrd question
In-Reply-To: <1186306305.693234.266390@w3g2000hsg.googlegroups.com>
References: <mailman.1596.1186188547.22759.python-list@python.org>
	<1186306305.693234.266390@w3g2000hsg.googlegroups.com>
Message-ID: <1186440325.053904.85990@x40g2000prg.googlegroups.com>

On Aug 5, 7:31 pm, has <has.te... at virgin.net> wrote:
>
> Nope,  DistUtils will copy all modules to site-packages as part of the
> installation procedure. If you're a developer you'll probably want to
> keep the original distribution around as it'll contain documentation,
> examples, etc. which you'll want to refer to when writing your own
> scripts. End-users of your scripts won't need it though.

xlrd installs sub-folders called "docs" and "examples", containing you-
guess-what. The runxlrd.py script will be parked in a "scripts" folder
somewhere. There should been no need to retain the folder into which
the distribution was unpacked and from which it was installed.



From matsben at gmail.com  Mon Aug 20 03:04:45 2007
From: matsben at gmail.com (Mats)
Date: Mon, 20 Aug 2007 00:04:45 -0700
Subject: best GUI library for vector drawing program
In-Reply-To: <1187361760.396397.251030@e9g2000prf.googlegroups.com>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
	<1187359935.718745.206790@i38g2000prf.googlegroups.com>
	<1187361760.396397.251030@e9g2000prf.googlegroups.com>
Message-ID: <1187593485.206021.291390@w3g2000hsg.googlegroups.com>

If you want to stay within Tcl/Tk you could take a look at my tkpath
package:
http://tclbitprint.sf.net/
and shots:
http://tclbitprint.sourceforge.net/tkpath/quartz/index.html
http://tclbitprint.sourceforge.net/tkpath/gdiplus/index.html
http://tclbitprint.sourceforge.net/tkpath/cairo/index.html

Mats



From mail at timgolden.me.uk  Fri Aug 24 03:55:01 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 24 Aug 2007 08:55:01 +0100
Subject: Newbie: List file system roots
In-Reply-To: <VfmdnUadeYEpeVDb4p2dnAA@telenor.com>
References: <VfmdnUadeYEpeVDb4p2dnAA@telenor.com>
Message-ID: <46CE8ED5.6070506@timgolden.me.uk>

Einar W. H?st wrote:
> Hi,
> 
> How would you list the file system roots in Python? That is, I'm looking
> for a way to list all connected drives (C:, D: etc) on a Windows box, or
> all /root, /tmp etc on a *nix box. In Java, there's a built-in API
> function to do this, File.listRoots(), but I couldn't find any
> equivalents in the Python libraries.

Couple of options for Windows (probably more as well):

http://timgolden.me.uk/python/win32_how_do_i/find-drive-types.html
http://timgolden.me.uk/python/wmi_cookbook.html#find-drive-types

TJG



From lists at liquidtrust.org  Wed Aug 22 13:42:33 2007
From: lists at liquidtrust.org (Charlie)
Date: Wed, 22 Aug 2007 11:42:33 -0600
Subject: MsiLib
Message-ID: <20070822114233.vnncyhsiyo0swc8w@74.220.202.27>

Hi,

I am trying to figure out how to use msilib to extract the registry  
information from an MSI file and I really could use a good example of  
how that is accomplished or even just an example using msilib in  
general. Does anybody happen to know of an example for this as I  
wasn't able to find one? If there isn't one, would anybody be willing  
to throw one together?

Thanks
Charlie



From quetzalcotl at consultant.com  Mon Aug 20 04:23:13 2007
From: quetzalcotl at consultant.com (Ingo Menger)
Date: Mon, 20 Aug 2007 01:23:13 -0700
Subject: Xah's Edu Corner: Under the spell of Leibniz's dream
In-Reply-To: <1187567809.896668.228650@z24g2000prh.googlegroups.com>
References: <1187567809.896668.228650@z24g2000prh.googlegroups.com>
Message-ID: <1187598193.118227.270460@19g2000hsx.googlegroups.com>

On 20 Aug., 01:56, Xah Lee <x... at xahlee.org> wrote:

> (for you math illiterates out there: ...
> (for you mathematicians out there: ...

Please, Xah Lee, could you possibly stop to "explain" things that are
absolutely trivial? If somebody has doubts about the etymology of a
word, he may use the dictionary, or he could ask.




From SMERSH009X at gmail.com  Fri Aug  3 21:58:10 2007
From: SMERSH009X at gmail.com (SMERSH009)
Date: Sat, 04 Aug 2007 01:58:10 -0000
Subject: Script that Navigates Page needs Javascript Functionality
Message-ID: <1186192690.100410.260840@g12g2000prg.googlegroups.com>

I have a script that navigates pages and scrapes the HTML source of
the page.
in order to view the results I need I need python to "navigate to"
this Javascript link:
javascript:__doPostBack('ctl00$cpMain$pagerTop','4')  This basically
translates into "go to page 4."
I read the posts on this group, and from what I understand, the
functionality I need is with simplejson? If so, what is the syntax i
would use to execute that Javascript?
Or am I completely off base with using simplejson altogether?


Thanks for the help
-Sam



From horpner at yahoo.com  Wed Aug  8 15:23:16 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 08 Aug 2007 19:23:16 GMT
Subject: Misleading wikipedia article on Python 3?
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
	<eICti.37400$G23.15165@newsreading01.news.tds.net>
	<41Dti.37401$G23.10727@newsreading01.news.tds.net>
	<1186582066.096793.14700@57g2000hsv.googlegroups.com>
	<slrnfbk05n.20o.horpner@FIAD06.norwich.edu>
	<1186600271.858692.182090@22g2000hsm.googlegroups.com>
Message-ID: <slrnfbk5ur.228.horpner@FIAD06.norwich.edu>

On 2007-08-08, Istvan Albert <istvan.albert at gmail.com> wrote:
> On Aug 8, 2:00 pm, Neil Cerutti <horp... at yahoo.com> wrote:
>
>> I thought, in fact, that open was on more shaky ground. ;)
>
> yeah, that too ...

OK, I had misremembered. The current docs say that open is
preferred, and that file should rather be used as a type name.
>
>> I can't find any evidence of that in the PEPs. Do you have a reference?
>
> here is something:
>
> http://svn.python.org/view/python/branches/p3yk/Misc/NEWS?rev=56685&view=auto
>
> look for :
>
> - Removed these Python builtins:
>   apply(), callable(), coerce(), file(), reduce(), reload()

Thanks very much.

-- 
Neil Cerutti
Outside of the killings, Washington has one of the lowest crime rates in the
country. --Marion Barry


From rcdailey at gmail.com  Tue Aug 14 11:42:00 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 14 Aug 2007 10:42:00 -0500
Subject: Python script for mobile platforms -- suggested?
In-Reply-To: <46C12274.2070705@jayloden.com>
References: <496954360708121958m170b6cd2j8419802dcdd35482@mail.gmail.com>
	<496954360708131727o5276d5a5w57baff6cbea4c34c@mail.gmail.com>
	<46C12274.2070705@jayloden.com>
Message-ID: <496954360708140842s2e5b7c6ctb7a40aa4099719db@mail.gmail.com>

Hi Jay,

I apologize for not having been detailed enough. Right now I'm using a C++
library known as TinyXML to parse my XML files. When a menu is to be
displayed, the XML is parsed and the appropriate images, text, etc that will
display on the menu is loaded based on the data in that XML. Note that the
XML parsing happens before the menu is drawn and only happens once per menu
as to avoid performance overhead during the menu drawing.

For example, to create a menu that has an image in the center of the screen,
the XML would be this:

<Page>
    <Frame type="Root">
        <Frame type="Image" value="MyImage.png">
            <Origin point="CENTER"/>
            <Justification point="CENTER"/>
        </Frame>
    </Frame>
</Page>

The "Origin" and "Justification" elements act sort of like function calls,
and the "Frame" element defines an "Object" kind of. Each Frame is a visual
element in the Menu.

I'm not sure if you'll agree or not, but even in this simple example it's
very hard to read just given the nature of the XML syntax. Secondly, I'm not
using XML as it was intended to be used. I'm using it as a script instead of
a representation of data. Most of the real menus are 600+ lines of XML much
like above, however it is not nearly as simplistic. I will paste a real
example of a menu below this email for those curious to look at it.

I haven't decided on what the Python version of the example above would look
like, that would probably happen sometime after I decided to go with Python
for a menu scripting replacement (If I do, that is). I might mix XML and
Python much like World of Warcraft mixes XML with LUA script. Again, this
all depends on design. The important points I wanted to get across is that
the Python script wont' be executed past the construction of a menu. The
Python/XML script would be simply there to allow the game to create the menu
and other important things.

I hope I've given enough examples and details. If I haven't, please let me
know and I'll answer any questions you may have. Thanks for following up.

On 8/13/07, Jay Loden <python at jayloden.com> wrote:
>
> Robert Dailey wrote:
> >     I'm currently developing a game for a cell phone. The game has a GUI
> >     system that's currently using XML to define the individual menus.
> >     Basically this means that for every single menu the user goes to, it
> >     loads and parses an XML file. Would using Python Script instead of
> >     XML be a reasonable replacement, or would it be even slower? I've
> >     read various articles online but I'm still curious to hear what
> >     everyone has to say here.
>
> A number of questions come to mind...for starters:
>
> 1) What is parsing the XML now? C code? Python?
> 2) What is the proposed python script supposed to do when they load the
> menu? without knowing that or seeing some sample code or details, that's an
> impossible question to answer, since an arbitrary Python script might take
> milliseconds, seconds, hours, or days to complete running.
>
> It might help if you give a concrete example (code is always welcome!) and
> explained exactly what the options are that you're considering and why. Then
> the folks on the list can try to give you a rough estimate or possibly
> suggest alternative methods you may not have considered.
>
> -Jay
>
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From horpner at yahoo.com  Wed Aug 15 12:10:10 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 15 Aug 2007 16:10:10 GMT
Subject: closing StringIO objects
References: <slrnfc67ml.27o.horpner@FIAD06.norwich.edu>
	<1i2vpnc.wv6c3n1r76qzvN%aleax@mac.com>
Message-ID: <slrnfc69ir.24o.horpner@FIAD06.norwich.edu>

On 2007-08-15, Alex Martelli <aleax at mac.com> wrote:
> Neil Cerutti <horpner at yahoo.com> wrote:
>> The documentation says the following about StringIO.close:
>> 
>>   close( ) 
>>   Free the memory buffer. 
>> 
>> Or else... what? 
>
> Or else the memory buffer sticks around, so you can keep
> calling getvalue as needed.  I believe the freeing will happen
> anyway, eventually, if and when the StringIO instance is
> garbage collected (just like, say, a file object's underlying
> fd gets closed when the file object is garbage collected), but
> relying on such behavior is often considered a dubious practice
> nowadays (given the existence of many Python implementations
> whose GC strategies differ).

Thanks. It doesn't seem worth the trouble, given your
explanation.

I was refactoring some pickled StringIO code, and decided to try
out the with statement. I discovered that StringIO isn't a
context manager, so I dipped into contextlib and found 'closing'.
But it's starting to look overengineered, and I realized I had no
idea if it was worth all this fuss just to close a StringIO
object.

from __future__ import with_statement
from contextlib import closing
import pickle
import StringIO

def unserialize(d):
    with closing(StringIO.StringIO(d)) as s:
        obj = pickle.load(s)
        return obj

def serialize(d):
    with closing(StringIO.StringIO()) as s:
        pickle.dump(d, s)
        arg = s.getvalue()
        return arg

-- 
Neil Cerutti
Beethoven wrote fewer symphonies than Haydn and Mozart because he wrote
longer, and besides he went death. --Music Lit Essay


From ldo at geek-central.gen.new_zealand  Tue Aug 28 07:41:07 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Tue, 28 Aug 2007 23:41:07 +1200
Subject: Xah's Edu Corner: Under the spell of Leibniz's dream
References: <1187567809.896668.228650@z24g2000prh.googlegroups.com>
	<1187578927.945921.280180@q4g2000prc.googlegroups.com>
	<fad46v02kb8@news3.newsguy.com>
Message-ID: <fb11fv$rs6$1@lust.ihug.co.nz>

In message <fad46v02kb8 at news3.newsguy.com>, Albert Y. C. Lai wrote:

> Twisted wrote:
>> A link to a copy in a non-toxic format would be nice.
> 
> http://www.cs.utexas.edu/users/EWD/transcriptions/EWD12xx/EWD1298.html

Not a mention of G?del.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Aug 24 06:08:13 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 24 Aug 2007 12:08:13 +0200
Subject: Newbie: List file system roots
References: <VfmdnUadeYEpeVDb4p2dnAA@telenor.com>
Message-ID: <5j7p0dF2vlof6U1@mid.individual.net>

"Einar W. H?st" wrote:
> How would you list the file system roots in Python? That is, I'm
> looking for a way to list all connected drives (C:, D: etc) on a
> Windows box, or all /root, /tmp etc on a *nix box. 

/root and /tmp are no "roots", but normal directories.
glob.glob("/*") will give you all of those. 

Regards,


Bj?rn

-- 
BOFH excuse #236:

Fanout dropping voltage too much, try cutting some of those little
traces



From tjreedy at udel.edu  Mon Aug 20 11:18:49 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 20 Aug 2007 11:18:49 -0400
Subject: yet another indentation proposal
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com><13ci0oesdtlh871@corp.supernews.com><_49yi.9351$3x.6614@newssvr25.news.prodigy.net><1187589173.410862.132580@o80g2000hse.googlegroups.com>
	<D_gyi.6547$sH3.154@fe091.usenetserver.com>
Message-ID: <facbe0$cbp$1@sea.gmane.org>

If there is not one already, a page for blind and visually impaired 
programmers on the Python site would be a good addition. 





From michele.simionato at gmail.com  Mon Aug 13 01:58:42 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Mon, 13 Aug 2007 05:58:42 -0000
Subject: is there anybody using __del__ correctly??
In-Reply-To: <0M2dnWsFO7-zwSLbnZ2dnUVZ_ryqnZ2d@comcast.com>
References: <1186731369.073644.158490@z24g2000prh.googlegroups.com>
	<1186762908.121319.35900@x35g2000prf.googlegroups.com>
	<SradnX_-hI91BiHbnZ2dnUVZ_r6rnZ2d@comcast.com>
	<1186895084.388293.295330@57g2000hsv.googlegroups.com>
	<0M2dnWsFO7-zwSLbnZ2dnUVZ_ryqnZ2d@comcast.com>
Message-ID: <1186984722.604498.39490@q75g2000hsh.googlegroups.com>

On Aug 12, 9:14 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> Michele Simionato wrote:
> > On Aug 10, 7:09 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> >> There were also a few recipes posted during this discussion that wrap
> >> weakrefs up a bit nicer so it's easier to use them in place of __del__:
>
> >>http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/519635
>
> > I knew about your recipe and I thought it was clever, *very*
> > clever. I have been thinking about it a bit more today and
> > here is an alternative, which does not require metaclasses,
> > does not require descriptors, and does not require the user to
> > declare the attributes she will use in the __finalize__ method.
> > Warning: it is no more tested than the test case in your recipe:
>
> > import weakref
>
> > _get = object.__getattribute__
> > _set = object.__setattr__
> > _del = object.__delattr__
>
> > def getinnerobj(self):
> >     return _get(self, '*innerobj*')
>
> > class Impostor(object):
> >     "It tries very hard to impersonate the inner object"
> >     def __init__(self, obj):
> >         _set(self, '*innerobj*', obj)
> >     def __getattribute__(self, name):
> >         return getattr(getinnerobj(self), name)
> >     def __setattr__(self, name, value):
> >         _set(getinnerobj(self), name, value)
> >     def __delattr__(self, name):
> >         _del(getinnerobj(self), name)
>
> > _refset = set()
>
> > class Finalized(object):
> >     def __new__(cls, *args, **kw):
> >         self = super(Finalized, cls).__new__(cls, *args, **kw)
> >         self.__init__(*args, **kw)
> >         def finalize(ref, refset=_refset):
> >             refset.remove(ref)
> >             cls.__finalize__(self)
> >         fake = Impostor(self)
> >         _refset.add(weakref.ref(fake, finalize))
> >         return fake
> >     def __finalize__(self):
> >         pass
>
> The problem here is that __getattribute__ doesn't work for things like
> __getitem__.

Yeah, it is the old issue of special methods being special, i.e.
len(x)
is not exactly x.__len__(). I am not sure if this can be changed in
Py3k,
it is certainly annoying in some (rare) circumstances, as
here.
One workaround is to add all special methods to the Impostor
class:

SPECIALMETHODS = ['__%s__' % name for name in
'''
abs add and call concat contains delitem delslice div eq floordiv ge
getitem
getslice gt iadd iand iconcat idiv ifloordiv ilshift imod imul index
inv invert
ior ipow irepeat irshift isub iter itruediv ixor le len lshift lt mod
mul ne neg
not or pos pow repeat repr rshift setitem setslice str sub truediv
xor
'''.split()]

def add_special_method(cls,
name):                                                             def
meth(self,
*args):
        return getattr(self, name)
(*args)
    meth.__name__ =
name
    setattr(cls, name,
meth)
for name in
SPECIALMETHODS:
    add_special_method(Impostor,
name)

In this way the Impostor can emulate even the special methods. Here is
an
example:

>>> class C(object):
...
pass
...
>>> c=Impostor(C())
>>> print c
<__main__.C object at
0x102a390>

Notice that the impostor is calling the __str__ method of C, so it
really
looks like a C object.
Moreover

>>> c.__class__
<class
'__main__.C'>

and

>>> isinstance(c, C)
True

so the Impostor is doing a damn pretty good job of imposture for C
objects.
Of course it does what it can, and it cannot impersonate C objects
completely:
>>> type(c)
<class
'__main__.Impostor'>

so code using checks like ``type(c) is C`` would break and the
approach here
cannot be considered more than a hack. Still a cool hack, I would
say ;)

    Michele Simionato



From jonas.esp at googlemail.com  Fri Aug 17 19:13:03 2007
From: jonas.esp at googlemail.com (Kless)
Date: Fri, 17 Aug 2007 23:13:03 -0000
Subject: Encryption and hashing
In-Reply-To: <mailman.2122.1187379425.22759.python-list@python.org>
References: <1187377630.017794.36510@50g2000hsm.googlegroups.com>
	<mailman.2122.1187379425.22759.python-list@python.org>
Message-ID: <1187392383.237609.97250@19g2000hsx.googlegroups.com>

On 17 ago, 20:34, Laszlo Nagy <gand... at shopzeus.com> wrote:
> > For who knows any of criptography I comment that you can use
> > algorithms as secure as Rijndael, Twofish, or Serpent with the CFB
> > cipher mode. And for hash you can use RIPEMD, SHA-2 or WHIRLPOOL.
>
> As I recall, PyCrypto can also use these, and many others. And it can
> also do RSA.

These are the algorithms supported in the last version of PyCrypto:

$ ls pycrypto-2.0.1/src/
AES.c             Blowfish.c  DES.c            IDEA.c
RIPEMD.c           winrand.c
ARC2.c            cast5.c     _dsa.c           MD2.c
_rsa.c             XOR.c
ARC4.c            CAST.c      _fastmath.c      MD4.c   SHA256.c
block_template.c  DES3.c      hash_template.c  RC5.c
stream_template.c

So it haven't Twofish, Serpent, neither Whirlpool. Neither many others.



From __peter__ at web.de  Wed Aug 22 03:05:59 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 22 Aug 2007 09:05:59 +0200
Subject: Logging module gives duplicate log entries
References: <1187702248.203917.188570@k79g2000hse.googlegroups.com>
	<mailman.61.1187702909.32294.python-list@python.org>
	<1187731317.661324.244870@k79g2000hse.googlegroups.com>
	<fafm57$abl$00$1@news.t-online.com>
	<1187735263.468497.147220@l22g2000prc.googlegroups.com>
Message-ID: <fagnc4$njm$02$1@news.t-online.com>

Shiao wrote:

> Maybe my question wasn't very clear. What I meant is that these four
> lines lead in my case to two entries per logged event:
> 
> applog = logging.getLogger()
> applog.setLevel(logging.DEBUG)
> hdl = logging.FileHandler('/tmp/foo.log')
> applog.addHandler(hdl)
> 
> However if I REPLACE the above by:
> 
> logging.basicConfig(level=logging.DEBUG, filename='/tmp/foo.log')
> 
> things work as expected.

Then you have a logic error in your program that causes that piece of code
to run twice (I simulate that by the for-loop):

$ python
Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import logging
>>> for i in range(2):
...     logging.getLogger().addHandler(logging.StreamHandler())
...
>>> logging.warn("twice")
twice
twice

logging.basicConfig() on the other hand does nothing if it finds existing
handlers:

$ python
Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import logging
>>> for i in range(2):
...     logging.basicConfig()
...
>>> logging.warn("once")
WARNING:root:once

Peter



From hniksic at xemacs.org  Wed Aug 22 03:59:39 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 22 Aug 2007 09:59:39 +0200
Subject: File Read Cache - How to purge?
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
	<87veb9xb7y.fsf@mulj.homelinux.net>
	<slrnfcm1hv.4r1.nick@irishsea.home.craig-wood.com>
	<87ir781afk.fsf@mulj.homelinux.net>
	<mailman.95.1187756936.32294.python-list@python.org>
Message-ID: <87k5roov84.fsf@mulj.homelinux.net>

Steve Holden <steve at holdenweb.com> writes:

>> That URL claims that you need to run "sync" before dropping the
>> cache, and so do other resources.  I wonder if that means that
>> dropping the cache is unsafe on a running system.
>
> Good grief. Just let the operating system do its job, for Pete's
> sake, and go find something else to obsess about.

Purging the page cache for the purposes of benchmarking (such as
measuring cold start time of large applications) is an FAQ, not an
"obsession".  No one is arguing that the OS shouldn't do its job in
the general case.


From kairosenthal at tiscali.de  Fri Aug 10 05:24:57 2007
From: kairosenthal at tiscali.de (Kai Rosenthal)
Date: Fri, 10 Aug 2007 02:24:57 -0700
Subject: com: makepy gencache.EnsureModule
Message-ID: <1186737897.040138.201880@j4g2000prf.googlegroups.com>

Hello,

I' having a problem with gencache.EnsureModule:

I used win32com\client\makepy.py to successfully generate Python
sources.
Unfortunately, after I call win32com.client.Dispatch(), the object I
get back is of type "COMObject" instead of one of the generated
classes.

In particular, I'm trying to interact with SolidWorks Extensibility
Type Library and the PROGID is "SldWorks.Application".

Using win32com\client\makepy.py -i
SolidWorks Extensibility Type Library
 {801A0000-A66C-11D3-A8BD-0000861EBBD6}, lcid=0, major=1, minor=0
 >>> # Use these commands in Python code to auto generate .py support
 >>> from win32com.client import gencache
 >>> gencache.EnsureModule('{801A0000-A66C-11D3-A8BD-0000861EBBD6}',
0, 1, 0)

Looking in win32com\gen-py, the appropriate file _does_ exist:
801A0000-A66C-11D3-A8BD-0000861EBBD6x0x1x0.py
and it does contain the correct class definitions.

Then, in my code:
>>> mod = win32com.client.gencache.EnsureModule('{801A2001-A66C-11D3-A8BD-0000861EBBD6}', 0, 1, 0)
>>> mod
None
>>> ob = win32com.client.Dispatch("SldWorks.Application")
>>> ob
<COMObject SldWorks.Application>

Why are the object mod is None and the object ob is <COMObject
SldWorks.Application>  instead  <win32com.gen_py.<blah>>?
Any bright ideas as to what's going wrong here?

Thanks for your hints, Kai



From __peter__ at web.de  Fri Aug 10 07:31:18 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 10 Aug 2007 13:31:18 +0200
Subject: subprocess.Popen(cmd) question
References: <mailman.1822.1186736453.22759.python-list@python.org>
Message-ID: <f9hiaa$ih1$03$1@news.t-online.com>

WolfgangZ wrote:

> I'm starting some subprocesses inside a loop. The processes run
> independent and dont need any communication between each other. Due to
> memory issues I need to limit the number of running processes to around
> 10. How can I insert a break into my loop to wait until some processes
> are finished?
> 
> Some minimal examplecode:
> 
> import subprocess
> for i in range(0,100):
>      cmd='ping localhost'
>      p=subprocess.Popen(cmd)
>      p.wait()
> 

Just polling the processes may be good enough:

import random
import subprocess
import sys
import time
from itertools import islice
from functools import partial

PROCESSES = 100
SIMULTANEOUS = 10

def info(*args):
    print >> sys.stderr, " ".join(str(a) for a in args)

class Process(object):
    def __init__(self, index):
        self.index = index
        info("starting process #%d" % index)
        self.process = subprocess.Popen(["ping", "localhost", "-w", "%d" %
random.randrange(1, 6)])
    def __nonzero__(self):
        running = self.process.poll() is None
        if not running:
            # XXX ugly side effect
            info("process #%d terminated" % self.index)
        return running

def processes():
    for i in range(PROCESSES):
        yield partial(Process, i)

def main():
    starters = processes()
    running = [sp() for sp in islice(starters, SIMULTANEOUS)]
    while running:
        before = len(running)
        running = [p for p in running if p]
        after = len(running)
        if before == after:
            info("waiting")
            time.sleep(1)
        else:
            running.extend(sp() for sp in islice(starters, SIMULTANEOUS -
len(running)))
    info("that's all, folks")

if __name__ == "__main__":
    main()

Peter


From kwmsmith at gmail.com  Fri Aug  3 16:51:03 2007
From: kwmsmith at gmail.com (Kurt Smith)
Date: Fri, 3 Aug 2007 15:51:03 -0500
Subject: Strange set of errors
In-Reply-To: <fee9cfbd0708031053s6c9f70e2wc16e299a64d56d6@mail.gmail.com>
References: <fee9cfbd0708031053s6c9f70e2wc16e299a64d56d6@mail.gmail.com>
Message-ID: <c266a7930708031351x171cd405v4b218a2b4ffd6fe7@mail.gmail.com>

On 8/3/07, Stephen Webb <sdavis.webb at gmail.com> wrote:
> Greetings all,
>
> I've recently begun using Python to do scientific computation, and I wrote
> the following script to find approximate eigenvalues for a semi-infinite
> matrix:
>
>
>  from pylab import *
> from numpy import *
> from scipy import *
>
> def bandstructure(N,s):
>
>     b = s/4.0
>
>     jmax = 10 + N**2
>
>     spectrum1 = [0]*2*N
>     spectrum2 = [0]*2*N
>     spectrum3 = [0]*2*N
>
>
>     for k in arange(1, 2*N+1, 1):
>
>         A = zeros( (jmax,jmax) )
>
>         i = 0
>         while i <= jmax-1:
>             if i <= jmax-2:
>                 A[i,i+1] = b
>                 A[i+1,i] = b
>                 A[i,i] = ((k + 2.0*i*N)/N)**2
>                 i = i+1
>             else:
>                 A[i,i] = ((k + 2.0*i*N)/N)**2
>                 i = i+1
>
>         #This portion of the code builds a matrix twice as large to check
> against
>
>         B = zeros( (2*jmax,2*jmax) )
>
>         i = 0
>         while i <= 2*jmax-1:
>             if i <= 2*jmax-2:
>                 B[i,i+1] = b
>                 B[i+1,i] = b
>                 B[i,i] = ((k + 2.0*i*N)/N)**2
>                 i = i+1
>             else:
>                 B[i,i] = ((k + 2.0*i*N)/N)**2
>                 i = i+1
>
>         x = linalg.eigvals(A)
>         y = linalg.eigvals(B)
>
>         j = 1
>         while j<=3:
>             if abs(y[j]-x[j]) <= 10.0**(-5):
>                 j = j + 1
>             else:
>                 print 'jmax not large enough to obtain accurate results'
>
>         spectrum1[k-1] = x[0] + 0.5*s
>         spectrum2[k-1] = x[1] + 0.5*s
>         spectrum3[k-1] = x[2] + 0.5*s
>
>     plot (k, spectrum1, k, spectrum2, k, spectrum3)
>
>     xlabel('k (energy level)')
>     ylabel('E/E_r')
>     title('Finite Size Band Structure, N = %d, s = %f' % (N, s))
>     grid(true)
>
>
> When I run this script, I get the following message, which I can't figure
> out:
>
>  Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "bandstruc.py", line 61, in bandstructure
>     plot (k, spectrum1, k, spectrum2, k, spectrum3)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/pylab.py",
> line 2028, in plot
>     ret =  gca().plot(*args, **kwargs)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/axes.py",
> line 2535, in plot
>     for line in self._get_lines(*args, **kwargs):
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/axes.py",
> line 437, in _grab_next_args
>     for seg in self._plot_2_args(remaining[:2], **kwargs):
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/axes.py",
> line 337, in _plot_2_args
>     x, y, multicol = self._xy_from_xy(x, y)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/axes.py",
> line 266, in _xy_from_xy
>     nrx, ncx = x.shape
>  ValueError: need more than 0 values to unpack
>


Basically, you're trying to plot spectrum[123] vs. k: the spectra are
lists, but k is an integer.  I made some modifications to get things
working more smoothly.  Note the ion() function call at the beginning,
and the use of "indx = arange(1,2*N+1)" instead of plotting vs. k.

There's probably some other things that could be cleaned up, but I'm
short on time right now; this will get your code working at least.

Hope this helps,
(From a fellow physicist)
Kurt

##################################################################

from pylab import *
from numpy import *

ion()

def bandstructure(N,s):

    b = s/4.0

    jmax = 10 + N**2

    spectrum1 = [0]*2*N
    spectrum2 = [0]*2*N
    spectrum3 = [0]*2*N


    for k in arange(1, 2*N+1, 1):

        A = zeros( (jmax,jmax) )

        i = 0
        while i <= jmax-1:
            if i <= jmax-2:
                A[i,i+1] = b
                A[i+1,i] = b
                A[i,i] = ((k + 2.0*i*N)/N)**2
                i = i+1
            else:
                A[i,i] = ((k + 2.0*i*N)/N)**2
                i = i+1

        #This portion of the code builds a matrix twice as large to
check against

        B = zeros( (2*jmax,2*jmax) )

        i = 0
        while i <= 2*jmax-1:
            if i <= 2*jmax-2:
                B[i,i+1] = b
                B[i+1,i] = b
                B[i,i] = ((k + 2.0*i*N)/N)**2
                i = i+1
            else:
                B[i,i] = ((k + 2.0*i*N)/N)**2
                i = i+1

        x = linalg.eigvals(A)
        y = linalg.eigvals(B)

        j = 1
        while j<=3:
            if abs(y[j]-x[j]) <= 10.0**(-5):
                j = j + 1
            else:
                print 'jmax not large enough to obtain accurate results'

        spectrum1[k-1] = x[0] + 0.5*s
        spectrum2[k-1] = x[1] + 0.5*s
        spectrum3[k-1] = x[2] + 0.5*s

    indx = arange(1,2*N+1, 1)
    plot (indx, spectrum1, indx, spectrum2, indx, spectrum3)

    xlabel('k (energy level)')
    ylabel('E/E_r')
    title('Finite Size Band Structure, N = %d, s = %f' % (N, s))
    grid(True)


From glarocque at cfl.forestry.ca  Thu Aug 16 09:46:58 2007
From: glarocque at cfl.forestry.ca (glarocque at cfl.forestry.ca)
Date: Thu, 16 Aug 2007 06:46:58 -0700
Subject: (Re)announcing APL 2007
In-Reply-To: <1186764041.534462.156660@e9g2000prf.googlegroups.com>
References: <5hnkb3F3hus4jU1@mid.individual.net>
	<1186406430.744134.298400@x35g2000prf.googlegroups.com>
	<1186764041.534462.156660@e9g2000prf.googlegroups.com>
Message-ID: <1187272018.280910.15390@g4g2000hsf.googlegroups.com>

On Aug 10, 12:40 pm, r... at ca.inter.net wrote:
> On Aug 6, 9:20 am, Paul Mansour <p... at carlislegroup.com> wrote:
>
> > APL2007 Roll Call: Is anyone going to this?
>
> > I'm thinking about going, but I don't want to the only one to show up,
> > as in San Diego.
>
> Here here.
>
> Sorry to mention the elephant in the room, but this discussion begs
> the obvious question:  what is the rationale for putting on this
> conference?  Perhaps I missed that discussion, and if so, please
> excuse me.
>
> As we know, there are already two well-attended APL vendor conferences
> in the world each year, plus several other more local gatherings.
>
> Speaking as an APL consultant and product distributor, this puts
> people in a tough spot, since we now have at least three events to
> consider travelling to and attending (assuming APL2000 is hosting its
> usual Florida event this year?).
>
> I suppose I should be happy for another opportunity to meet and
> network with potential APL colleagues and customers, but if it's
> mainly the same small audience at each event, the costs are hard to
> justify more than once per year.
>
> I don't have any answers to this dilemma yet, but I think it requires
> a lot more discussion. Just putting on a conference and hoping people
> attend may, at this point I think, be somewhat counterproductive.
>
> ...richard

Richard,

In your comments you were concerned by the fact that the rationale for
APL2007 was not clear. You also mentioned that there was some sort of
a conflict with two APL vendor conferences. When the decision was made
to hold a conference in the fall of 2007, the members of the steering
committee were well aware that there was a potential conflict with APL
vendor workshops. However, we had a discussion about this issue and
finally concluded that it was a good idea to go ahead with APL2007 for
two reasons. First, the idea to hold APL2007 is to have users of
different Array Programming Languages (including APL, J, K, NIAL and
other related languages) attend the conference. SIGAPL, in addition to
fostering the discussion between array programming languages
themselves, aims to promote the array processing paradigm and its
richness in contrast to the scalar one. It is SIGAPL's vision to serve
as a counterpoint in the programming community by facilitating
communications among researchers, developers and users of Array
Programming Languages. APL2007 will be an excellent opportunity to
promote our core values in the mainstream programming community
through our conference agenda, tutorials and discussion panels. This
will benefit APL and all Array Programming Languages. Second, there
was an opportunity to meet jointly with OOPSLA. Thus, APL2007
attendees will have the opportunity to spend a few more days and
attend other presentations on object oriented programming. As far as
APL is concerned, there has been development in object oriented
programming in some APL versions. I am confident that all the APL
vendors and many APL consultants and users will attend the conference,
along with researchers, consultants or users of Array Programming
Languages. So, I am looking forward to meeting you at APL2007.

Guy Larocque
SIGAPL Chairman



From graemeglass at gmail.com  Fri Aug 10 08:24:29 2007
From: graemeglass at gmail.com (Graeme Glass)
Date: Fri, 10 Aug 2007 12:24:29 -0000
Subject: Threaded Design Question
In-Reply-To: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
References: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
Message-ID: <1186748669.095699.112760@g12g2000prg.googlegroups.com>

Using IPC is just adding needles complexity to your program. Instead
of constantly scanning the directory for files and then adding them to
a Queue, and then having to worry if that specific file may have
already been popped off the queue and is currently running by one of
the workers, just poll the directory for a specific event, ala
CREATE.

If you are using a *nix based system, you can use, pyinotify (http://
pyinotify.sourceforge.net/) using EventsCodes.IN_CREATE event.
Else if you using a windows system, take a look at:
http://tgolden.sc.sabren.com/python/win32_how_do_i/watch_directory_for_changes.html,
Tim has a couple of different ideas, sure one of them will be what you
need.

Then all you have to do is added newly created files to the queue,
fork the off to workers and the workers can delete them when they
done. No need to worry if someone is working with it already, as it
will only be added once to the queue, when it is created. HTH.

Regards,
Graeme



From cvezvu at gmail.com  Wed Aug 15 08:32:52 2007
From: cvezvu at gmail.com (cvezvu at gmail.com)
Date: Wed, 15 Aug 2007 12:32:52 -0000
Subject: Guitar Reviews
Message-ID: <1187181172.442413.193040@57g2000hsv.googlegroups.com>

Custom guitar, acoustic guitar, electric guitars, reviews,
specifications, pictures, prices, all here!!!!!

http://pro-guitars.blogspot.com/


Free guitars!!!!

http://freeguitars.blogspot.com/



From dejanews at email.com  Sun Aug 19 08:27:07 2007
From: dejanews at email.com (samwyse)
Date: Sun, 19 Aug 2007 07:27:07 -0500
Subject: Parser Generator?
In-Reply-To: <_6mdnZxbdNKTVFrbnZ2dnUVZ_tqtnZ2d@comcast.com>
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
	<_6mdnZxbdNKTVFrbnZ2dnUVZ_tqtnZ2d@comcast.com>
Message-ID: <xHWxi.1073$vU4.633@nlpi068.nbdc.sbc.com>

Jack wrote:
> Thanks for all the replies!
> 
> SPARK looks promising. Its doc doesn't say if it handles unicode
> (CJK in particular) encoding though.
> 
> Yapps also looks powerful: http://theory.stanford.edu/~amitp/yapps/
> 
> There's also PyGgy http://lava.net/~newsham/pyggy/
> 
> I may also give Antlr a try.
> 
> If anyone has experiences using any of the parser generators with CJK
> languages, I'd be very interested in hearing that.

I'm going to echo Tommy's reply.  If you want to parse natural language, 
conventional parsers are going to be worse than useless (because you'll 
keep thinking, "Just one more tweak and this time it'll work for 
sure!").  Instead, go look at what the interactive fiction community 
uses.  They analyse the statement in multiple passes, first picking out 
the verbs, then the noun phrases.  Some of their parsers can do 
on-the-fly domain-specific spelling correction, etc, and all of them can 
ask the user for clarification.  (I'm currently cobbling together 
something similar for pre-teen users.)


From wildemar at freakmail.de  Mon Aug 20 11:23:29 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Mon, 20 Aug 2007 17:23:29 +0200
Subject: Newbee Question
In-Reply-To: <5itohrF3qv9t4U1@mid.uni-berlin.de>
References: <mailman.15.1187620149.26576.python-list@python.org>
	<5itohrF3qv9t4U1@mid.uni-berlin.de>
Message-ID: <46C9B1F1.2000705@freakmail.de>

Diez B. Roggisch wrote:
> Sounds a bit like homework. Which usually isn't simply delivered here.
>
>   
Wrong! Usually that happens pretty quickly here (as proven again in this 
case). Not that it should, but only the seniors seem to detect lazy 
learners.

/W


From multiseed at gmail.com  Tue Aug 21 09:17:28 2007
From: multiseed at gmail.com (Shiao)
Date: Tue, 21 Aug 2007 13:17:28 -0000
Subject: Logging module gives duplicate log entries
Message-ID: <1187702248.203917.188570@k79g2000hse.googlegroups.com>

Hi,
I am getting duplicate log entries with the logging module.

The following behaves as expected, leading to one log entry for each
logged event:

logging.basicConfig(level=logging.DEBUG, filename='/tmp/foo.log')

But this results in two entries for each logged event:

applog = logging.getLogger()
applog.setLevel(logging.DEBUG)
hdl = logging.FileHandler('/tmp/foo.log')
applog.addHandler(hdl)


The app is based on the web.py framework, so I guess my problem may
be
connected to be some interaction with other uses of logging within
the
framework. This is not specific to the root logger, the same happens
with logging.getLogger('foo').

Any clue would be more than welcome.

best,
ShiaoBu



From newsreturns at biszumknie.de  Tue Aug 28 08:37:34 2007
From: newsreturns at biszumknie.de (Andreas Lobinger)
Date: Tue, 28 Aug 2007 14:37:34 +0200
Subject: expat error, help to debug?
In-Reply-To: <fb14rp$s28$1@daniel-new.mch.sbs.de>
References: <fak7q4$ahn$1@daniel-new.mch.sbs.de> <farjd8$51g$1@lust.ihug.co.nz>
	<faug6k$pmo$1@daniel-new.mch.sbs.de>
	<fb14rp$s28$1@daniel-new.mch.sbs.de>
Message-ID: <fb14uh$s28$2@daniel-new.mch.sbs.de>

Aloha,

Andreas Lobinger wrote:
> Andreas Lobinger wrote:
>> Lawrence D'Oliveiro wrote:
>>> In message <fak7q4$ahn$1 at daniel-new.mch.sbs.de>, Andreas Lobinger wrote:
>>>> Anyone any idea where the error is produced?
> The registered Handler has to return a (integer) value.
> Would have been nice if this had been mentioned in the documentation.

Delete last line, it is mentioned in the documentation.


From dstromberg at datallegro.com  Tue Aug 21 18:31:40 2007
From: dstromberg at datallegro.com (Dan Stromberg - Datallegro)
Date: Tue, 21 Aug 2007 15:31:40 -0700
Subject: python debugging under emacs?
Message-ID: <pan.2007.08.21.22.31.39.485712@datallegro.com>


Is there a debugging mode in emacs that works well with python?

I tried gud, but it was giving me errors, so I thought I'd ask before I
try to get it to work: Is there an emacs mode (perhaps gud) that'll give a
view of the python source, and currenly executing line, the ability
inspect datastructures, etc.?  You know, like a modern debugger?  :)

I also looked at ddd, but it was cranky too, and apparently hasn't seen a
new release in years.

I'm really more of a vim person than an emacs person, but if emacs will
do what I want, I'd happily use it - for this.  :)



From spottedMetal at gmail.com  Sat Aug 11 16:45:10 2007
From: spottedMetal at gmail.com (Gregory D. Weber)
Date: Sat, 11 Aug 2007 20:45:10 GMT
Subject: Something in the function tutorial confused me.
In-Reply-To: <m3hvi.37606$G23.6240@newsreading01.news.tds.net>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
	<46B8626A.2070303@bigfoot.com>
	<mailman.1726.1186537161.22759.python-list@python.org>
	<5hsoi3F3mlni2U1@mid.individual.net> <f9ceb9$jsm$1@sea.gmane.org>
	<1186581124.3383.55.camel@dot.uniqsys.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
	<slrnfbk19k.20o.horpner@FIAD06.norwich.edu>
	<1i2nhxn.tme05x17r39odN%aleax@mac.com>
	<m3hvi.37606$G23.6240@newsreading01.news.tds.net>
Message-ID: <qdpvi.2225$ZW4.461@trndny04>

Neil Cerutti wrote:
> On 2007-08-11, Alex Martelli <aleax at mac.com> wrote:
>> Neil Cerutti <horpner at yahoo.com> wrote:
>>    ...
>>> The Python Language Reference seems a little confused about the
>>> terminology.
>>>
>>>   3.4.7 Emulating numeric types
>>>   6.3.1 Augmented assignment statements
>>>
>>> The former refers to "augmented arithmetic operations", which I
>>> think is a nice terminology, since assignment is not necessarily
>>> taking place. Then the latter muddies the waters.
>> Assignment *IS* "necessarily taking place"; if you try the augmented
>> assignment on something that DOESN'T support assignment, you'll get an
>> exception.  Consider:
>>
>>>>> tup=([],)
>>>>> tup[0] += ['zap']
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>> TypeError: 'tuple' object does not support item assignment
>>
>> Tuples don't support item ASSIGNMENT, and += is an ASSIGNMENT,
>> so tuples don't allow a += on any of their items.
>>
>> If you thought that += wasn't an assignment, this behavior and
>> error message would be very problematic; since the language
>> reference ISN'T confused and has things quite right, this
>> behavior and error message are perfectly consistent and clear.
> 
> Thanks for the correction. I was under the illusion that
> sometimes augmented assignment would instead mutate the
> object.
> 

I too thought += was an assignment.  And it bit me very painfully a few weeks ago.

If it's an assignment, then wouldn't "x += y" mean the same thing as "x = x + y"?

If so, why does an assignment to variable a, below, have the *side effect* of changing variable b ... ?

>>> a = [1, 2, 3]
>>> b = a
>>> b
[1, 2, 3]
>>> a += [4]
>>> a
[1, 2, 3, 4]
>>> b
[1, 2, 3, 4]

... but using the "x = x + y" style, the assignment to variable c, below, does *not* have a side effect on variable d (as indeed it should not!)?

>>> c = [1, 2, 3]
>>> d = c
>>> d
[1, 2, 3]
>>> c = c + [4]
>>> c
[1, 2, 3, 4]
>>> d
[1, 2, 3]
>>> 


From sbellon at sbellon.de  Wed Aug  8 19:14:41 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Thu, 9 Aug 2007 01:14:41 +0200
Subject: Destruction of generator objects
References: <20070808002852.6228ae91@cube.tz.axivion.com>
	<1186613044.494852.306970@q75g2000hsh.googlegroups.com>
Message-ID: <20070809011441.05d7dfb6@cube.tz.axivion.com>

On Wed, 08 Aug, MRAB wrote:

> Simple! :-)

Sorry, I forgot to mention that I am forced to using Python 2.4.

-- 
Stefan Bellon


From mxr at qvii.com  Thu Aug  2 12:02:20 2007
From: mxr at qvii.com (Mike Rooney)
Date: Thu, 02 Aug 2007 12:02:20 -0400
Subject: Error subclassing datetime.date and pickling
Message-ID: <46B2000C.4090001@qvii.com>

Hi everyone, this is my first post to this list. I am trying to create a 
subclass of datetime.date and pickle it, but I get errors on loading it 
back. I have created a VERY simple demo of this:

import datetime

class MyDate(datetime.date):
    """
    This should be pickleable.
   
    >>> md = MyDate(2007, 1, 6)
    >>> import pickle
    >>> pickle.dump(md, open("test.pickle", 'w'))
    >>> mdp = pickle.load(open("test.pickle"))
    >>> import os; os.remove("test.pickle")
    """
    def __init__(self, y, m, d):
        datetime.date.__init__(self, y, m, d)
       
if __name__ == "__main__":
    import doctest
    doctest.testmod()


The traceback that occurs is:

    Traceback (most recent call last):
      File "C:\Python25\lib\doctest.py", line 1212, in __run
        compileflags, 1) in test.globs
      File "<doctest __main__.MyDate[3]>", line 1, in <module>
        mdp = pickle.load(open("test.pickle"))
      File "C:\Python25\lib\pickle.py", line 1370, in load
        return Unpickler(file).load()
      File "C:\Python25\lib\pickle.py", line 858, in load
        dispatch[key](self)
      File "C:\Python25\lib\pickle.py", line 1133, in load_red
        value = func(*args)
    TypeError: __init__() takes exactly 4 arguments (2 given)


I have found a few relating issues:
 - 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=952807&group_id=5470
 - 
http://sourceforge.net/tracker/index.php?func=detail&aid=720908&group_id=5470&atid=105470

But these are both rather old and are marked as fixed. I am running 
Python 2.5.1 on Windows XP SP2. Any help here would be greatly appreciated!

- Mike


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Aug  6 03:48:44 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 06 Aug 2007 09:48:44 +0200
Subject: A question on plugin design
In-Reply-To: <873ayxso2o.fsf@pobox.com>
References: <mailman.1643.1186312593.22759.python-list@python.org>
	<87fy2yrp4y.fsf@pobox.com> <873ayxso2o.fsf@pobox.com>
Message-ID: <46b6d24b$0$29273$426a74cc@news.free.fr>

John J. Lee a ?crit :
> jjl at pobox.com (John J. Lee) writes:
> 
>> Grzegorz S?odkowicz <jergosh at wp.pl> writes:
>> [...]
>>> I'd also be grateful for pointers to a well designed Pythonic plugin
>>> architecture but I'd much prefer a small project with a simple API.
>> Google for setuptools and Python eggs.  Search for "entry point" on
>> the setuptools page.
> 
> And as an example of a project that uses that plugin system, look at
> the nose testing tool

And at Trac too.


From dijkstra.arjen at gmail.com  Thu Aug  9 10:43:04 2007
From: dijkstra.arjen at gmail.com (dijkstra.arjen at gmail.com)
Date: Thu, 09 Aug 2007 14:43:04 -0000
Subject: tests
In-Reply-To: <f9f70t$dpm$1@solaris.cc.vt.edu>
References: <mailman.1792.1186665714.22759.python-list@python.org>
	<1186666919.456036.120270@d30g2000prg.googlegroups.com>
	<f9f70t$dpm$1@solaris.cc.vt.edu>
Message-ID: <1186670584.148181.180040@r34g2000hsd.googlegroups.com>

On Aug 9, 4:04 pm, brad <byte8b... at gmail.com> wrote:
> kyoso... at gmail.com wrote:
> > You should be able to read chunks of each file in binary mode and do a
> > compare to check for equality. Some kind of loop should do the trick.
>
> Why not a simple md5 or sha with the hash library?

Or even:

http://docs.python.org/lib/module-filecmp.html



From dejanews at email.com  Sun Aug 19 08:42:39 2007
From: dejanews at email.com (samwyse)
Date: Sun, 19 Aug 2007 12:42:39 GMT
Subject: Searching for pixel color
In-Reply-To: <mailman.2158.1187490946.22759.python-list@python.org>
References: <mailman.2158.1187490946.22759.python-list@python.org>
Message-ID: <3VWxi.28395$RX.23749@newssvr11.news.prodigy.net>

michael maver wrote:
> Hello, I was just wondering if anyone knew of a way to search the screen 
> for a certain color in Python.

I know of lots of ways to do this...

> I know it is possible to do this in other languages, but I'm not sure 
> how I'd go about doing this in Python. Just to let you know, I'm running 
> windows XP and I don't really need it to be a cross platform solution, 
> but if it was that'd be an extra bonus.

... but they are all platform dependent; not just Windows vs Unix, but 
PIL vs wxWin vs whatever.

def search_screen(desired_color):
   root = my_gui.root_window()
   width, height = root.get_size()
   for x in xrange(0, width):
     for y in xrange(0, height):
       if root.get_pixel(x,y) == desired_color:
         return x,y
   return -1, -1

Modify the above using the appropriate values for 'my_gui' and its 
methods, 'root_window', 'get_size' and 'get_pixel'.

 > Thanks very much for taking the time to read this and, hopefully, 
respond!

You're welcome.


From uymqlp502 at sneakemail.com  Thu Aug 30 22:00:47 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Thu, 30 Aug 2007 19:00:47 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <7xlkbsmqe4.fsf@ruckus.brouhaha.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
Message-ID: <1188525647.003223.199620@q5g2000prf.googlegroups.com>


Paul Rubin wrote:
> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
> > FWIW, the "Eiffel and SPARK Ada folks" also "brilliantly explained"
> > why one can not hope to "write reliable programs" without strict
> > static declarative type-checking.
>
> I don't know about Eiffel but at least an important subset of SPARK
> Ada's DBC stuff is done using static analysis tools (not actually
> built into the compiler as it happens) to verify statically
> (i.e. without actually running the code) that the code fulfills the
> DBC conditions.  I don't see any way to do that with Python
> decorators.

Yes, thanks for reminding me about that. With SPARK Ada, it is
possible for some real
(non-trivial) applications to formally (i.e., mathematically) *prove*
correctness by static
analysis. I doubt that is possible without "static declarative type-
checking."

SPARK Ada is for applications that really *must* be correct or people
could die. With all
due respect, most (not all, but most) Python programmers never get
near such programs
and have no idea about how stringent the requirements are. Nor do most
programmers
in general, for that matter. (It's not an insult)



From ssalvatori at gmail.com  Tue Aug 14 23:08:58 2007
From: ssalvatori at gmail.com (stefano)
Date: Wed, 15 Aug 2007 03:08:58 -0000
Subject: make images with python
Message-ID: <1187147338.400947.181010@x40g2000prg.googlegroups.com>

I need make some images using python but i'm lost :P

i need some module to make .png (with drawline, drawcircle, drawpoint
etc etc etc )

like gd for php :P

thants :D



From dstromberg at datallegro.com  Thu Aug  9 17:26:19 2007
From: dstromberg at datallegro.com (Dan Stromberg - Datallegro)
Date: Thu, 09 Aug 2007 21:26:19 GMT
Subject: Screenscraping, in python, a web page that requires javascript?
Message-ID: <pan.2007.08.09.21.26.19.132419@datallegro.com>


Is there a method, with python, of screenscraping a web page, if that web
page uses javascript?

I know about BeautifulSoup, but AFAIK at this time, BeautifulSoup is for
HTML that doesn't have embedded javascript.

Thanks!



From larry.bates at websafe.com  Fri Aug 31 19:42:10 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 31 Aug 2007 18:42:10 -0500
Subject: parsing response from SOAPpy request
In-Reply-To: <1188601582.917623.122890@r29g2000hsg.googlegroups.com>
References: <1188601582.917623.122890@r29g2000hsg.googlegroups.com>
Message-ID: <wtSdndt9-MHROkXbnZ2dnUVZ_o_inZ2d@comcast.com>

seancron wrote:
> I'm using SOAPpy to access weather data from the NOAA National Digital
> Forecast Database XML Web Service [1] and I've been having
> trouble figuring out how to parse the data.
> 
> The response comes back as XML document but when I check it with
> type(result) it shows the the response is a string.  Does anyone have
> any
> suggestions on getting relevant data?
> 
> Thanks,
> -Sean
> 
> [1] http://www.weather.gov/forecasts/xml/
> 
XML data is just a string of characters.  Use elementree xml parser (built into 
Python 2.5 available for download for prior versions) to parse it for what you 
want to extract.

-Larry


From rcdailey at gmail.com  Tue Aug 21 17:07:19 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 21 Aug 2007 16:07:19 -0500
Subject: Latest models of Gibson guitars
In-Reply-To: <HmGyi.1296$Uf7.1005@trnddc06>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<1187548916.909340.37420@k79g2000hse.googlegroups.com>
	<1187579396.285862.186860@e9g2000prf.googlegroups.com>
	<9K6dnY8HnIUNHlTbnZ2dnUVZ_gGdnZ2d@comcast.com>
	<1187657694.106990.266830@z24g2000prh.googlegroups.com>
	<1187700758.572516.186610@57g2000hsv.googlegroups.com>
	<HmGyi.1296$Uf7.1005@trnddc06>
Message-ID: <496954360708211407g22064295n56a4a3b142641e04@mail.gmail.com>

lol...

On 8/21/07, Tony <t.seput?@?verizon.com> wrote:
>
> I don't who is posting here stupid shit about guitars
> who ever is do self fever hang your self with one of strings
>
>
> "kaldrenon" <kaldrenon at gmail.com> wrote in message
> news:1187700758.572516.186610 at 57g2000hsv.googlegroups.com...
> > On Aug 20, 8:54 pm, Twisted <twisted... at gmail.com> wrote:
> >> If the message then
> >> says something absurd, like "this is a newsgroup about Python" when
> >> I'm reading it in cljp, well, what do you expect? :P
> >
> > I think most would expect you to go, "WTF?" but then, like a rational
> > person, click the helpful little "More options" link that GG provides
> > (I'm assuming you use GG to read as well as to post, forgive me if I'm
> > wrong) and double-check before harassing someone because you jumped to
> > conclusions.
> >
> >> though nothing in the headers would indicate this.
> >
> > Newsgroups: comp.lang.java.programmer,
> > microsoft.public.dotnet.framework.aspnet, comp.lang.python,
> > rec.photo.digital, alt.home.repair
> > From: mobile... at gmail.com
> > Date: Sun, 19 Aug 2007 17:34:58 -0000
> > Local: Sun, Aug 19 2007 1:34 pm
> > Subject: Latest models of Gibson guitars
> >
> > That's the header GG shows. Preeeetty clear.
> >
> > Just a tip for future reference - all's fair if you weren't aware of
> > this feature of GG's interface.
> >
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From hhygcy at gmail.com  Mon Aug 13 04:27:44 2007
From: hhygcy at gmail.com (Ge Chunyuan)
Date: Mon, 13 Aug 2007 08:27:44 -0000
Subject: which IDE is highly recommended in Windows OS
In-Reply-To: <f9oert$24k1$1@sxnews1.qg.com>
References: <1186970945.403792.51790@d55g2000hsg.googlegroups.com>
	<f9oert$24k1$1@sxnews1.qg.com>
Message-ID: <1186993664.769976.109710@r34g2000hsd.googlegroups.com>

On Aug 13, 10:24 am, _spitFIRE <timid.gen... at gmail.com> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Ge Chunyuan wrote:
> > hi Group:
>
> > I am a new comer for Python, I wonder which IDE is recommended in
> > Windows OS.
> > Can anyone give some suggestion.
>
> > Thanks indeed
> > Ge Chunyuan
>
> - - Stani's Python Editor
> (http://www.softpedia.com/get/Programming/Coding-languages-Compilers/S...)
> - - Black Adder (http://www.thekompany.com/products/blackadder/)
> - - Zeus (http://www.zeusedit.com/python.html)
> - - PyScripter (http://mmm-experts.com/Products.aspx?ProductId=4)
> - - ActivePython (http://www.activestate.com/)
> - - IDLE (http://www.python.org/idle/doc/idle2.html)
>
> and depending on how you define IDEs, you can also decide whether or not to
> include, the following
> - - emacs
> - - vim
> - - scite
> ...
>
> - --
> _ _ _]{5pitph!r3}[_ _ _
> __________________________________________________
> "I'm smart enough to know that I'm dumb."
>   - Richard P Feynman
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.6 (GNU/Linux)
> Comment: Using GnuPG with Mozilla -http://enigmail.mozdev.org
>
> iD8DBQFGv8DSA0th8WKBUJMRAqGcAJ9hhMp3tyS7XmBZT2+fol/A69j4jwCfXNya
> xQTmmDlDF5BAfiWkrSW3TuQ=
> =902n
> -----END PGP SIGNATURE-----

thanks buddy, I am now using ActivePython, actually it is beyond my
expectation:)



From jstroud at mbi.ucla.edu  Fri Aug 24 16:17:06 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 24 Aug 2007 13:17:06 -0700
Subject: GUI and distrubution
In-Reply-To: <92ab7$46cf1f51$4275d90a$11544@FUSE.NET>
References: <1187974418.175783.50860@i38g2000prf.googlegroups.com>
	<92ab7$46cf1f51$4275d90a$11544@FUSE.NET>
Message-ID: <fanec2$nr$1@daisy.noc.ucla.edu>

Kevin Walzer wrote:
> anders wrote:
> 
>> So how is the preferably way to distribute software written i Python
> 
>> My next question is witch is the best GUI to use, also consider
>> the delivery question above.
>>
> 
> These are two of the most-often-asked questions on this list (along with 
> "What's the best Python IDE?"). Search the list archives via Google, or 
> do a general Google search. Some helpful terms to get you started 
> include pyinstaller, py2exe, py2app, Tkinter, wxPython, PyQt, and pyGTK.

One of these days, someone needs to write a tutorial on distributing for 
  the Big 3 (Linux, OSX, and Amiga--or was that last one supposed to be 
M$?).

James


-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From goldtech at worldpost.com  Sun Aug 19 11:43:53 2007
From: goldtech at worldpost.com (goldtech)
Date: Sun, 19 Aug 2007 08:43:53 -0700
Subject: Python syntax r prefix to a string
Message-ID: <1187538233.285841.117280@e9g2000prf.googlegroups.com>

Does anyone know this syntax and could link me to an explanation?

Something like:

Workspace = r'C:\foobar\mystuff\xyz'

What's that "r" doing? Sometimes I see a "u" too.

Explanation appreciated.

Thanks,
Lee G.



From steven.bethard at gmail.com  Thu Aug 23 23:01:01 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 23 Aug 2007 21:01:01 -0600
Subject: optparse - required options
In-Reply-To: <mailman.181.1187886467.32294.python-list@python.org>
References: <496954360708201251r137dfaedqe632361891eae343@mail.gmail.com>	<46C9F7D1.9040506@jayloden.com>	<496954360708201353v19ea266cr50f144d1d71d5912@mail.gmail.com>	<46CA0814.6050200@jayloden.com>
	<mailman.181.1187886467.32294.python-list@python.org>
Message-ID: <z92dnfwLKf9z1FPbnZ2dnUVZ_oesnZ2d@comcast.com>

Omari Norman wrote:
> On Mon, Aug 20, 2007 at 05:31:00PM -0400, Jay Loden wrote:
>> Robert Dailey wrote:
>>> Well, I don't know what is wrong with people then. I don't see how
>>> required arguments are of bad design.
> 
>> I tend to agree...while "required option" may be an oxymoron in
>> English, I can think of quite a few scripts I've written myself (in
>> various languages) that needed at least some kind of user input to
>> operate.
> 
> The idea with optparse is not that programs should not require certain
> information on the command line; rather, the idea is that this
> information should be positional arguments, not 'options'.
> 
> That is, to use the compiler example:
> 
> compiler file
> 
> is preferred if a file argument is necessary.
> 
> compiler --file file
> 
> is not preferred.

I agree with the optparse philosophy, but Practicality Beats Purity. 
That's why I was convinced to add "required options" to argparse -- 
there are too many applications that want that kind of interface.
*I* don't write applications with interfaces like that, but enough 
people do that the use case should really be supported.

STeVe


From nepbabucxspamfree at yahoo.ca  Tue Aug 21 06:45:17 2007
From: nepbabucxspamfree at yahoo.ca (Bikal KC)
Date: Tue, 21 Aug 2007 20:15:17 +0930
Subject: IDE for Python
In-Reply-To: <mailman.55.1187690455.32294.python-list@python.org>
References: <mailman.55.1187690455.32294.python-list@python.org>
Message-ID: <46cac234$1_1@news.chariot.net.au>

Joel Andres Granados wrote:
> Hello list:
> 
> I have tried various times to use an IDE for python put have always been
> disapointed.
> I haven't revisited the idea in about a year and was wondering what the
> python people
> use.
> I have also found http://pida.co.uk/main as a possible solution.  Anyone
> tried it yet?

Free -
DrPython, Pydev extension to Eclipse, IDLE.

Show me the money -
Komodo, IntelliJ IDEA, Visual Python, Wing Python

Do your homework and Google for them now. :-)


Cheers


From olsongt at verizon.net  Mon Aug 13 12:03:48 2007
From: olsongt at verizon.net (olsongt at verizon.net)
Date: Mon, 13 Aug 2007 09:03:48 -0700
Subject: ANN: Compyler 0.1
In-Reply-To: <1187020875.575423.58000@o61g2000hsh.googlegroups.com>
References: <mailman.1859.1186862018.22759.python-list@python.org>
	<46bf2ea3$0$240$e4fe514c@news.xs4all.nl>
	<1187020875.575423.58000@o61g2000hsh.googlegroups.com>
Message-ID: <1187021028.714284.255560@b79g2000hse.googlegroups.com>

>
>   + has the exact same semantics as compiler code.  I was more
>

This "should read exact same semantics as python code"



From http  Sun Aug 12 21:36:22 2007
From: http (Paul Rubin)
Date: 12 Aug 2007 18:36:22 -0700
Subject: LRU cache?
References: <7x8x8ixomj.fsf_-_@ruckus.brouhaha.com>
	<1i2peoe.18eos9adkclkcN%aleax@mac.com>
Message-ID: <7xd4xsfc6h.fsf@ruckus.brouhaha.com>

aleax at mac.com (Alex Martelli) writes:
> So what's wrong with Evan Prodromou's lrucache.py module that's in pypi?
> Haven't used it, but can't see anything wrong at a glance.

Thanks, I wasn't aware of that one.  I notice two things about it:
1) it's under a GPL-incompatible license (therefore also incompatible 
   with the PSF license); that's a problem for what I'm doing.

2) it uses heapq to figure out which entry is the oldest.  I guess
that's not too unreasonable and maybe it's necessary.  But unless I'm
missing something it's never necessary to insert new records into the
middle of the list-by-age.  So I think it may be easiest to just keep
a doubly linked list of records with the invariant that they are
ordered by age, keeping track of where both ends are; plus a hash
table to map indices to nodes in the linked list.  On any access that
hits the cache, the found node gets removed and moved to the front of
the list in O(1) operations.  This may be easiest with a circular
list.


From jr244 at kent.ac.uk  Fri Aug 24 09:45:51 2007
From: jr244 at kent.ac.uk (J. Robertson)
Date: Fri, 24 Aug 2007 14:45:51 +0100
Subject: Co-developers wanted: document markup language
In-Reply-To: <1187956692.378840.251540@m37g2000prh.googlegroups.com>
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com>
	<87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com>
	<87tzqp77my.fsf@wilson.homeunix.com>
	<7xy7g1if24.fsf@ruckus.brouhaha.com>
	<87mywh717i.fsf@wilson.homeunix.com>
	<1187947900.676122.144490@e9g2000prf.googlegroups.com>
	<87absh6wn6.fsf@wilson.homeunix.com>
	<1187953231.106631.174870@q4g2000prc.googlegroups.com>
	<mailman.242.1187955295.32294.python-list@python.org>
	<1187956692.378840.251540@m37g2000prh.googlegroups.com>
Message-ID: <famnef$iqf$2@oheron.kent.ac.uk>

olive wrote:

>>> [snip]

> 
> But few people are used to Plain Text Markup (excepted in some
> scientific area maybe) and it is error prone.
> 

It looks very much like Gummi's authors and target audience actually are 
part of the few people you are talking about: i.e. console-happy folks 
that are perfectly fine with how the math system goes in LaTeX, say, but 
are annoyed by the clutter besides that.  I can't imagine they would 
want to go anywhere near an equation editor, for example.

Looks like a worthwhile project to me :-)



From shahmed at sfwmd.gov  Tue Aug 28 08:57:51 2007
From: shahmed at sfwmd.gov (Ahmed, Shakir)
Date: Tue, 28 Aug 2007 08:57:51 -0400
Subject: Table update
In-Reply-To: <fb00tm$vu2$1@sea.gmane.org>
Message-ID: <14A2A120D369B6469BB154B2D2DC34D208B6D336@EXCHVS01.ad.sfwmd.gov>


I am trying to use python script to update a table by incremental value
based on struc_No but having problem to get right result on the value
field for the 3rd and 4th same number of struc_no. 

I need to update the Value field only with the incremental value of 15
or so

Any help is highly appreciated.

Thanks
Shak



Input table or source table

ID	struc_id	Struc_No	Value	
1	ABC		1001		10	
2	EFJ		1005		15	
3	HIK		1003		10	
4	ILK		1005		10	
5	PIO		1001		8	
6	TIN		1001		12	
7	MNO		1001		11	
8	POW		1003		18	


Output Table				
				
ID	struc_id	Struc_No	Value		Added value
1	ABC		1001		25		15
2	EFJ		1005		30		15
3	HIK		1003		25		15
4	ILK		1005		40		30
5	PIO		1001		38		30
6	TIN		1001		57		45
7	MNO		1001		71		60
8	POW		1003		48		30




From joesox at gmail.com  Mon Aug 20 15:51:51 2007
From: joesox at gmail.com (JoeSox)
Date: Mon, 20 Aug 2007 12:51:51 -0700
Subject: 'REPL' style IDE
In-Reply-To: <1187632249.748945.158910@i13g2000prf.googlegroups.com>
References: <1187632249.748945.158910@i13g2000prf.googlegroups.com>
Message-ID: <785694cd0708201251q45316c16of3516eb8254fd4d8@mail.gmail.com>

On 8/20/07, beginner <zyzhu2000 at gmail.com> wrote:
> Hi Everyone,
>
> I am using the Wing IDE. It works great when developing applications,
> but the workflow is like Visual Studio -- after you execute it or
> debug it, the python script ends.
>
> What I want is an interactive interpreting environment. I want the IDE
> to execute a boot script to initialize my environment and create some
> basic data objects. And then I want to be able to type in command on
> the command line using these objects. The IDLE that comes with Python
> does this, but compared with Wing, it does not have a lot of the
> convenient features.
>
> I am wondering if there is anything more powerful than IDLE that can
> do this.

I use Wing IDE.
Place something like this on the bottom of your module you are debuging.
Place a stop point on the line you want then start your debug! Hope that helps.

def test():
    c=MyClass
    c.do_foobar()
	
if __name__ == '__main__':
  test()
-- 
Later, Joe


From kay.schluehr at gmx.net  Sat Aug 11 07:19:33 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sat, 11 Aug 2007 04:19:33 -0700
Subject: Destruction of generator objects
In-Reply-To: <20070811121630.1b010eab@cube.tz.axivion.com>
References: <20070808002852.6228ae91@cube.tz.axivion.com>
	<1186613044.494852.306970@q75g2000hsh.googlegroups.com>
	<20070809011441.05d7dfb6@cube.tz.axivion.com>
	<1186819365.988117.232230@g4g2000hsf.googlegroups.com>
	<20070811121630.1b010eab@cube.tz.axivion.com>
Message-ID: <1186831173.814193.235420@o61g2000hsh.googlegroups.com>

On Aug 11, 12:16 pm, Stefan Bellon <sbel... at sbellon.de> wrote:
> On Sat, 11 Aug, Kay Schluehr wrote:
> > On Aug 9, 1:14 am, Stefan Bellon <sbel... at sbellon.de> wrote:
> > > Sorry, I forgot to mention that I am forced to using Python 2.4.
> > It doesn't matter. You can use try...finally as well in Python 2.4.
> > It's just not possible to use except and finally clauses in one
> > statement such as:
>
> [snip]
>
> The problem is yield inside try-finally which is not possible in 2.4.
>
> --
> Stefan Bellon

Oh, yeah... i overlooked this.

Honestly, I'd recommend wrapping the generator into a function object,
create the resource on construction ( or pass it ) and destroy it
implementing __del__.

def gen_value(self):
    while True:
        yield self.iter.next()

class GeneratorObj(object):
    def __init__(self, obj, gen):
        self.iter = make_iter(obj)
        self.gen  = gen(self)

    def __del__(self):
        destroy(self.iter)

    def next(self):
        return self.gen.next()




From devraj at gmail.com  Sun Aug 26 00:51:20 2007
From: devraj at gmail.com (Devraj)
Date: Sun, 26 Aug 2007 04:51:20 -0000
Subject: ActiveRecord for Python/MySQL
Message-ID: <1188103880.146814.110780@q4g2000prc.googlegroups.com>

Hi everyone,

My application uses MySQL as a backend and am using the MySQL/Python
bindings. Are there any libraries that provide a database abstraction
layer like Activerecords for Python?'

Any resources/links will be appreciated.

Thanks for your time.



From daniels at dsl-only.net  Thu Aug 30 23:10:47 2007
From: daniels at dsl-only.net (Scott David Daniels)
Date: Thu, 30 Aug 2007 20:10:47 -0700
Subject: Pivy problem and some other stuff
In-Reply-To: <5jom54Fh543U2@mid.uni-berlin.de>
References: <1188501707.593319.23330@m37g2000prh.googlegroups.com>
	<5jom54Fh543U2@mid.uni-berlin.de>
Message-ID: <13df1kmak87mbb@corp.supernews.com>

Marc 'BlackJack' Rintsch wrote:
A fine repy
> In [57]: funcs = [a, b]
> In [58]: funcs
> Out[58]: [<function a at 0xb7792e2c>, <function b at 0xb779e1ec>]
> 
> In [59]: funcs[0]()
> Out[59]: 1
> 
> In [60]: funcs[1]()
> Out[60]: 2

and a "list comprehension" allows you to call these things no matter how
long the list is.

So after the above:
     >>> results = [f() for f in funcs]
     >>> print results
     [1, 2]


From walterbyrd at iname.com  Tue Aug 28 17:15:43 2007
From: walterbyrd at iname.com (walterbyrd)
Date: Tue, 28 Aug 2007 14:15:43 -0700
Subject: Is it reasonably easy easy to something like this with python?
In-Reply-To: <mailman.78.1188327771.28954.python-list@python.org>
References: <1188326947.527698.245770@r23g2000prd.googlegroups.com>
	<mailman.78.1188327771.28954.python-list@python.org>
Message-ID: <1188335743.394160.254680@x35g2000prf.googlegroups.com>

On Aug 28, 1:31 pm, Gerardo Herzig <gher... at fmed.uba.ar> wrote:
> walterbyrd wrote:

> The one who make that table sorteable is AJAX. Not php. The php part is
> kind of trivial (so it would be `trivial' in python too). It just reads
> some data and format it in an html table.


Thank you, that is great to know. What if there were 1000 records, and
the table was paginated? I suppose, ajax would sort the front end, and
backend language, and database, would soft behind the scene, or
something?



From max at alcyone.com  Sat Aug  4 17:37:17 2007
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 04 Aug 2007 14:37:17 -0700
Subject: Question -- Running Programming Python Examples
In-Reply-To: <1186263007.587499.305340@57g2000hsv.googlegroups.com>
References: <1186263007.587499.305340@57g2000hsv.googlegroups.com>
Message-ID: <UOydnTGwbMsTbCnbnZ2dnUVZ_oPinZ2d@speakeasy.net>

chernevik at gmail.com wrote:

> Here is a newbie question: how do I get the server examples in the
> Preview chapter of  "Progamming Python" (Lutz) to run?  The code is
> supposed to be a little webserver on which to run examples, but when I
> run it it I get "permission denied".  Running it as root gets "address
> already in use".

The first error is because non-root users cannot bind to ports lower 
than 1024.  The second error means just what it says:  The address is 
already in use, so you can't bind to port 80.  Something else is already 
bound to it; probably you have an HTTP server already running as part of 
your default software installation and don't realize it.

Choose another port.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   If love is the answer, could you rephrase the question?
    -- Lily Tomlin


From sjmachin at lexicon.net  Sun Aug 26 18:14:22 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 26 Aug 2007 15:14:22 -0700
Subject: my parser.py isn't imported
In-Reply-To: <874pimqpei.fsf@wilson.homeunix.com>
References: <874pimqpei.fsf@wilson.homeunix.com>
Message-ID: <1188166462.066732.123620@i13g2000prf.googlegroups.com>

On Aug 27, 1:36 am, Torsten Bronger <bron... at physik.rwth-aachen.de>
wrote:
> Hall?chen!
>
> I have a module parser.py in the same directory as the main module.
> In the main module, I import "parser".  On Linux, this works as
> expected, however on Windows, it imports the stdlib parser module.
> sys.path[0] points to the directory of my parser.py in both cases.
> What went wrong here?

Ask a literal question, get a literal answer :-)

1. Failure to consider that problems can happen [and therefore will
happen [1]] when there are multiple entities with the same name.

2. Failure to RTFabulousM:
"""
Details of the module searching and loading process are implementation
and platform specific. It generally involves searching for a ``built-
in'' module with the given name and then searching a list of locations
given as sys.path.
"""

3. Failure to attempt enlightenment by using the -v option:
"""
import parser # builtin
"""
(on Windows)

Suggestion: Avoid the confusion. Rename your module. If it is actually
intended as a replacement for the builtin one, then you can do:
   import replacementparser as parser

[1] Codex Murphius, circa 5000 BCE

HTH,
John



From aleax at mac.com  Sun Aug 19 12:03:53 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 19 Aug 2007 09:03:53 -0700
Subject: clarification
References: <aa405c1f0708162332t7b6dbdd6o2cc0f512dc821d7b@mail.gmail.com>
	<mailman.2107.1187350363.22759.python-list@python.org>
	<fa41k8$10n$1@news2.u-psud.fr> <13cb7frnqs8f6d9@corp.supernews.com>
	<CSsxi.28081$RX.11328@newssvr11.news.prodigy.net>
	<CTDxi.6299$4w7.2405@newssvr22.news.prodigy.net>
	<1i31aop.2ing3h1hcfz0dN%aleax@mac.com>
	<vkWxi.28393$RX.16912@newssvr11.news.prodigy.net>
Message-ID: <1i332et.1rcnw4e1f97a5kN%aleax@mac.com>

samwyse <dejanews at email.com> wrote:
   ...
> > brain:~ alex$ python -mtimeit -s'sos=[set(range(x,x+4)) for x in
> > range(0, 100, 3)]' 'r=set()' 'for x in sos: r.update(x)'
> > 100000 loops, best of 3: 18.8 usec per loop
> > 
> > brain:~ alex$ python -mtimeit -s'sos=[set(range(x,x+4)) for x in
> > range(0, 100, 3)]' 'r=reduce(set.union, sos, set())'    
> > 10000 loops, best of 3: 87.2 usec per loop
> > 
> > Even in a case as tiny as this one, "reduce" is taking over 4 times
> > longer than the loop with the in-place mutator -- and it only gets
> > worse, as we're talking about O(N squared) vs O(N) performance!  Indeed,
> > this is part of what makes reduce an "attractive nuisance"...;-).  [[And

The set-union case, just like the list-catenation case, is O(N squared)
(when approached in a functional way) because the intermediate result
often _grows_ [whenever a new set or list operand adds items], and thus
a new temporary value must be allocated, and the K results-so-far
"copied over" (as part of constructing the new temp value) from the
previous temporary value; and sum(range(N)) grows quadratically in N.
The in-place approach avoids that fate by a strategy of proportional
over-allocation (used by both set and lists) that makes in-place
operations such as .update(X) and .extend(X) amortized O(K) where K is
len(X).

In the set-intersection case, the intermediate result _shrinks_ rather
than growing, so the amount of data "copied over" is a diminishing
quantity at each step, and so the analysis showing quadratic behavior
for the functional approach does not hold; behavior may be roughly
linear, influenced in minor ways by accidental regularities in the sets'
structure and order (especially likely for short sequences of small
sets, as in your case).  Using a slightly longer sequence of slightly
larger sets, with little structure to each, e.g.:

random.seed(12345)  # set seed to ensure total repeatability
los=[set(random.sample(range(1000), 990)) for x in range(200)]

at the end of the setup (the intersection of these 200 sets happens to
contain 132 items), I measure (as usual on my 18-months-old Macbook Pro
laptop):

stmt = 'reduce(set.intersection,los)'
best of 3: 1.66e+04 usec per loop
stmt = 'intersect_all(los)'
best of 3: 1.66e+04 usec per loop

and occasionally 1.65 or 1.67 instead of 1.66 for either or both,
whether with 10,000 or 100,000 loops.  (Not sure whether your
observations about the reduce-based approach becoming faster with more
loops may be due to anomalies in Windows' scheduler, or the accidental
regularities mentioned above; my timings are probably more regular since
I have two cores, one of which probably ends up dedicated to whatever
task I'm benchmarking while the other one runs all "background" stuff).

> turn indicates that both implementations actually work about same and
> your "O(n squared)" argument is irrelevant.

It's indeed irrelevant when the behavior _isn't_ quadratic (as in the
case of intersections) -- but unfortunately it _is_ needlessly quadratic
in most interesting cases involving containers (catenation of sequences,
union of sets, merging of dictionaries, merging of priority-queues,
...), because in those cases the intermediate temporary values tend to
grow, as I tried to explain in more detail above.


Alex


From wildemar at freakmail.de  Mon Aug 13 11:21:43 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Mon, 13 Aug 2007 17:21:43 +0200
Subject: Adventure-Engines in Python
In-Reply-To: <46C0255A.4080707@freakmail.de>
References: <46C0255A.4080707@freakmail.de>
Message-ID: <46C07707.8040803@freakmail.de>

Wildemar Wildenburger wrote:
> I've set out to make an adventure game and now I'm trying to find a set 
> of python-modules to help me do that. I know of the usual non-python 
> suspects (AGAST, AGS, Wintermute, ...) and while I they are really good, 
> I'd like one that is cross platform.
>   
OK, thanks. I should, of course, have been more specific. By saying 
"adventure" I mean the graphical variant (say, Monkey Island or Broken 
Sword), preferably but not necessarily in 2D.

I've also found vidaG, but it seems dead as well. I'll keep looking but 
if you know something, please let me know.


/W


From carsten at uniqsys.com  Fri Aug  3 22:16:02 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 03 Aug 2007 22:16:02 -0400
Subject: How to pass a reference to the current module
In-Reply-To: <f90ktr$hic$1@zinnia.noc.ucla.edu>
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<mailman.1597.1186189477.22759.python-list@python.org>
	<f90ktr$hic$1@zinnia.noc.ucla.edu>
Message-ID: <1186193762.3263.27.camel@localhost.localdomain>

On Fri, 2007-08-03 at 18:31 -0700, James Stroud wrote:
> Carsten Haese wrote:
> > please describe less abstractly what you're trying to do.
> 
> You sound like my former thesis adviser.

Thanks. I guess.

> OK. From an external source, such as configuration file, the user will 
> specify the *name* of a function somehow with the assumption that the 
> function will be coded somewhere (in the present or other modules) by 
> that name.

Does the configuration file indicate which module contains the function?

-- 
Carsten Haese
http://informixdb.sourceforge.net




From arnodel at googlemail.com  Thu Aug 30 15:45:30 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 30 Aug 2007 19:45:30 -0000
Subject: subclassing Python types
In-Reply-To: <1188502964.572795.89030@r23g2000prd.googlegroups.com>
References: <1188500442.434722.157350@q5g2000prf.googlegroups.com>
	<46d717f5$0$30367$9b4e6d93@newsspool4.arcor-online.net>
	<1188501865.541186.272290@e9g2000prf.googlegroups.com>
	<1188502964.572795.89030@r23g2000prd.googlegroups.com>
Message-ID: <1188503130.483093.243520@l22g2000prc.googlegroups.com>

On Aug 30, 8:42 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
[...]
> "Unifying types and classes in Python 2.2" (http://www.python.org/
> download/releases/2.2.3/descrintro/#__new__).

That's:

http://www.python.org/download/releases/2.2.3/descrintro/#__new__

(damn google groups ;)
--
Arnaud




From python at jayloden.com  Wed Aug 15 13:55:11 2007
From: python at jayloden.com (Jay Loden)
Date: Wed, 15 Aug 2007 13:55:11 -0400
Subject: sub-classing the types in the builtin module datetime
In-Reply-To: <f9v86f$s14$1@sea.gmane.org>
References: <f9v86f$s14$1@sea.gmane.org>
Message-ID: <46C33DFF.90704@jayloden.com>

Colin J. Williams wrote:
> I wish to sub-class (if that's the right word) datetime and to use a 
> different signature for the constructor.
> 
> The second part has gone smoothly, but it is difficult to access the 
> type's methods from the sub-class instance.
> 
> I'm beginning to wonder whether it might might be simpler to write my 
> own Date class.
> 
> Does anyone have any comments please?
> 
> Colin W.

I think it would be most effective if you can post the code you're using that illustrates the issue, and what you're trying to do so that the list members can analyze the actual problem. Tracebacks etc are also welcome if applicable.

-Jay


From bignose+hates-spam at benfinney.id.au  Fri Aug  3 20:40:57 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 04 Aug 2007 10:40:57 +1000
Subject: Emacs + python
References: <ak8x8v2udo.fsf@googlemail.com>
	<mailman.1476.1186017909.22759.python-list@python.org>
	<4vasi.139194$wG2.61677@newsfe17.lga>
	<mailman.1524.1186077010.22759.python-list@python.org>
	<JpGsi.28744$GO6.24370@newsfe21.lga>
Message-ID: <87zm189lnq.fsf@benfinney.id.au>

hg <hg at nospam.org> writes:

> how about a cscope equivalent ?

How about reading what was posted earlier in the thread, and give us a
description of what you want instead of a name that people might not
recognise?

-- 
 \      "The judge asked, 'What do you plead?' I said, 'Insanity, your |
  `\         honour. Who in their right mind would park in the passing |
_o__)                                        lane?'"  -- Steven Wright |
Ben Finney


From bjorns at gmail.com  Fri Aug 10 23:16:28 2007
From: bjorns at gmail.com (Beorn)
Date: Fri, 10 Aug 2007 20:16:28 -0700
Subject: The Future of Python Threading
In-Reply-To: <1186782710.600889.245930@j4g2000prf.googlegroups.com>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<1i2njyp.1o6yslqe7ff47N%luc@honk-honk.com>
	<1186782710.600889.245930@j4g2000prf.googlegroups.com>
Message-ID: <1186802188.653072.236260@x40g2000prg.googlegroups.com>

Btw, although overly simple (single CPU system!), this benchmark is
pretty interesting:

  http://muharem.wordpress.com/2007/07/31/erlang-vs-stackless-python-a-first-benchmark/


About the GIL:

I think I've heard Guido say the last attempt at removing the Global
Interpreter Lock (GIL) resulted in a Python that was much slower...
which kind-of beats the purpose.  I don't think it's feasible to
remove the GIL in CPython;  the best hope of a GIL-free Python might
be PyPy.

The general trend seems to be that it's hard enough to program single-
thread programs correctly, adding to that extreme concurrency
awareness as required when you're programming with threads means it's
practically impossible for most programmers to get the programs
right.  The shared-nothing model seems to be a very workable way to
scale for many programs (at least web apps/services).



From bj_666 at gmx.net  Tue Aug  7 02:21:29 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Aug 2007 06:21:29 GMT
Subject: Relative-importing *
References: <1185559874.299008.167010@x40g2000prg.googlegroups.com>
	<871weth2gg.fsf@benfinney.id.au>
	<pan.2007.07.28.06.17.39.399342@REMOVE.THIS.cybersource.com.au>
	<46ae3894$0$19609$426a34cc@news.free.fr>
	<1186200218.666444.254200@q3g2000prf.googlegroups.com>
	<87vebv9yrr.fsf@benfinney.id.au>
	<1186363732.188847.48070@q3g2000prf.googlegroups.com>
	<87zm15870h.fsf@benfinney.id.au>
	<1186454723.425679.220510@q3g2000prf.googlegroups.com>
Message-ID: <5hqhb9F3ldifeU2@mid.uni-berlin.de>

On Tue, 07 Aug 2007 02:45:23 +0000, rbygscrsepda wrote:

> Specifically, in Python 1.5, all of the following generate the error
> below:

In Python *1.5*!?  I somehow doubt that.  ;-)

>     from . import *
>     from .sibiling_package import *
>     from .. import *
>     from ..cousin_package import *
> 
>     SyntaxError: 'import *' not allowed with 'from .'
> 
> Importing * is a feature, but this seems like an artificial
> inconsistency to me. It's as if the compiler raises an error when it
> tries to import * as soon as it sees "from .", regardless of what
> comes after it. So is this a bug in python? And if it happens to be a
> bug, how can I alert the developers of the python compiler?

I'm just guessing here but as * imports are considered bad style the
developers might took the opportunity to forbid them in relative imports
because relative imports are new and this doesn't break old programs.

Ciao,
	Marc 'BlackJack' Rintsch


From carsten at uniqsys.com  Fri Aug 31 12:02:54 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 31 Aug 2007 12:02:54 -0400
Subject: So what exactly is a complex number?
In-Reply-To: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
Message-ID: <1188576174.3479.9.camel@dot.uniqsys.com>

On Thu, 2007-08-30 at 20:11 -0500, Lamonte Harris wrote:
> Like in math where you put letters that represent numbers for place
> holders to try to find the answer type complex numbers?

Is English your native language? I'm having a hard time decoding your
question.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From uymqlp502 at sneakemail.com  Thu Aug 30 20:34:14 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Thu, 30 Aug 2007 17:34:14 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <46d75d33$0$6231$426a34cc@news.free.fr>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<1188430887.481586.106760@l22g2000prc.googlegroups.com>
	<mailman.159.1188499976.28954.python-list@python.org>
	<1188504811.019632.186580@x35g2000prf.googlegroups.com>
	<46d75116$0$401$426a74cc@news.free.fr>
	<1188517050.174081.265900@x40g2000prg.googlegroups.com>
	<46d75d33$0$6231$426a34cc@news.free.fr>
Message-ID: <1188520454.996940.293030@m37g2000prh.googlegroups.com>


> > That looks like new syntax to me.
>
> It's the syntax for decorator functions, and it's not that new - it
> cames with Python 2.4, released November 30, 2004.

After looking more carefully at your example, I don't think it is as
clean and logical as the
PEP 316 syntax. At first I thought that your pre and post-conditions
applied to the class,
but now I realize that they apply to the function. I prefer to see the
conditions inside
the function in the doc string. That just seems more logical to me.
With all due respect,
your proposal is interesting, but I think it overextends the "function
decorator" idea a bit.

A nit-pick I might have with the PEP 316 syntax is that I think
"invariant" should be spelled
out rather than abbreviated as "inv".  The same might apply to "pre-
condition" and
"post-condition". But that's obviously no big deal.



From Brian.McCann at viziant.net  Fri Aug 24 12:18:51 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Fri, 24 Aug 2007 12:18:51 -0400
Subject: creating a tar file with python 
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE2F1@efmailx>

Ed, Carsten, Steve,
 
I don't care if  Steve Holden is the python God himself,
He's a rude, arrogant, vulgar human who shows his true level
of intellect by his use of profanity


And he goes one level lower, stating he respects the python group
he spews his profanity to.

He chose to respond to my question, no one dragged him out of bed,
as he so quickly pointed out. Re-read the thread!



If your three chums are indicative to the type of people in this group
Python is in sorry state

 

 
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From stefan.behnel-n05pAM at web.de  Sun Aug 12 02:21:48 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sun, 12 Aug 2007 08:21:48 +0200
Subject: python + XUL
In-Reply-To: <1186894004.913359.132000@b79g2000hse.googlegroups.com>
References: <1186894004.913359.132000@b79g2000hse.googlegroups.com>
Message-ID: <46BEA6FC.9050907@web.de>

Madhu Alagu wrote:
> Hi
> 
> 
> 
> Python + XUL Success Stories
> 
> 
> 
> 
> Thanks
> 
> Madhu Alagu

Any chance you forgot to ask a question?

Stefan


From aboudouvas at panafonet.gr  Mon Aug  6 07:27:05 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Mon, 06 Aug 2007 04:27:05 -0700
Subject: Eclipse/PyDev question.
In-Reply-To: <S3Osi.173945$wG2.172679@newsfe17.lga>
References: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>
	<S3Osi.173945$wG2.172679@newsfe17.lga>
Message-ID: <1186399625.013613.40260@d55g2000hsg.googlegroups.com>

> I like pydev and purchased the extensions ... there are bugs of course but
> what stopped me from using it is a project were I had some very large files
> (my fault).

What do you mean by "very large files" ? Can't PyDev handle such ?



From kay.schluehr at gmx.net  Tue Aug 28 02:53:03 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Mon, 27 Aug 2007 23:53:03 -0700
Subject: Python's Suitability?
In-Reply-To: <MPG.213d1a16e553c7fc9896d2@news.cox.net>
References: <MPG.213d1a16e553c7fc9896d2@news.cox.net>
Message-ID: <1188283983.498884.323740@g4g2000hsf.googlegroups.com>

On 28 Aug., 02:28, mrc2... at cox.net (Michael R. Copeland) wrote:

>    Note that I'm not considering using the existing C/C++ code in my Web
> application, because I don't know how to write a C/C++ Windows
> application - and I'm sure the learning curve here is greater than
> Python's.  I'm a very old procedural-based application developer (47+
> years of programming experience), and developing Windows applications is
> beyond me.

As I see it you might separate the console frontend from your database/
model backend and reuse your database code. The next step would be
selecting a webframework that allows you to plugin your own database
driver which has to be wrapped into a Python module. For wrapping into
a Python module there are several alternatives. SWIG and BOOST.Python
are most natural solutions for wrapping C++ code and exposing its
functionality to Python. Other options are writing a C interface to
your database and use ctypes, Pythons stdlib FFI ( see Python 2.5
docs ). Not sure if there are tools yet to derive a C interface
automatically from C++ classes. If so I would prefer the FFI approach.
For database plugins: a framework like Pylons [1] seems to be
particularly suited for this option but I would recommend requesting
answers by the Pylons community directly.

[1] http://pylonshq.com/




From jstroud at mbi.ucla.edu  Tue Aug 14 17:28:12 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 14 Aug 2007 14:28:12 -0700
Subject: buggie in else syntax ?
In-Reply-To: <mailman.1987.1187126270.22759.python-list@python.org>
References: <mailman.1987.1187126270.22759.python-list@python.org>
Message-ID: <f9t6pc$i56$1@daisy.noc.ucla.edu>

stef mientki wrote:
> hello,
> 
> I've the idea that the "else" syntax is not always handled correctly,
> or I'm overlooking something.
> 
> This pieces of code are automatic translation from another language,
> sometimes it works, sometimes it doesn't ???
> 
> This piece of code works nice:
> 
>    a = 2
> 
>    def JSM (line_nr):
>          print line_nr
> 
>    if a>3:
>        print 'asddas'
>    else: JSM(230) ; \        <== this is the problem line, that's ok here
>        print 'aaps'
> 
> While this piece of code gives a syntax error:
> 
>    #Function button_antidender(bit in pin,sbyte in out
>    Button_Counter_Temp,byte in demp) return bit is
>    def button_antidender ( pin, button_counter_temp, demp ):
>         #serial_hw_write(counter)
>        Serial_HW_Write ( button_counter_temp )                 ;JSM(226)
>        if JSM(227) and (   button_counter_temp >= 0 ):
>            if JSM(228) and (  pin == on ):
>                button_counter_temp =  button_counter_temp  +  1      
> ;JSM(229)
>            else: JSM(230) ;
>    \                                                <=== SYNTAX ERROR
>                button_counter_temp = 1                               
> ;JSM(231)
> 
> Traceback (most recent call last):
>  File "D:\data_to_test\JALsPy\JALsPy.py", line 347, in ?
>    Run_JALsPy_Application ()
>  File "D:\data_to_test\JALsPy\JALsPy.py", line 327, in 
> Run_JALsPy_Application
>    JG.app.MainLoop()
>  File "D:\data_to_test\JALsPy\JALsPy.py", line 255, in MainLoop
>    import JAL_simulation_file
>  File "D:\data_to_test\JALsPy\JAL_simulation_file.py", line 265
>    else: JSM(230) ; \
> 
> I guess it's not the preferred syntax, but the resemblance with the 
> original language it optimal.
> Why is it sometimes accepted an sometimes give an error message ?
> 
> thanks,
> Stef Mientki
> 
> 

Looks like you've escaped a space.


James


-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From iclark at mail.ewu.edu  Wed Aug 15 15:01:52 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Wed, 15 Aug 2007 12:01:52 -0700
Subject: All names in the current module
In-Reply-To: <87d4xowymq.fsf@wilson.homeunix.com>
References: <87d4xowymq.fsf@wilson.homeunix.com>
Message-ID: <f9vij0$1ln$1@sea.gmane.org>

Torsten Bronger wrote:
> Hall?chen!
> 
> How can I get a list with all classes defined in the current module?
> Thank you!
> 
> Tsch?,
> Torsten.
> 

Assuming you want to see all classes in the re module:

 >>> import re
 >>> help(re) #best way
 >>>
 >>> def isclass(cls):
...     try:
...             return issubclass(cls, cls)
...     except TypeError:
...             pass
...     return False
...
 >>> [cls for cls in dir(re) if isclass(getattr(re, cls))]
['Scanner', '_pattern_type', 'error']

Ian



From bj_666 at gmx.net  Wed Aug 22 15:59:34 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 Aug 2007 19:59:34 GMT
Subject: way to define static method
References: <mailman.133.1187811266.32294.python-list@python.org>
Message-ID: <5j3it6F3qf8ssU1@mid.uni-berlin.de>

On Wed, 22 Aug 2007 20:34:21 +0100, Eric CHAO wrote:

> I think Python uses a very strange way to define static method in a
> class. Why not make it like this?

What is so strange about it?

> class MyClass:
>     def my_static_method(self):
>         # self should be None as it's a static method
>         # just ignore self
> 
> I'm a newcomer so maybe it's quite naive. But I just wonder why it is
> designed like this.

That method above isn't a static method, so why should `self` be None? 
Static methods are created with the `staticmethod` function which can be
used as decorator:

class MyClass(object):
    @staticmethod
    def my_real_static_method():
        # Look ma, no `self`.  :-)

Static methods are just functions, on classes `classmethod`\s are often
more useful.  They get the class as first argument.

Ciao,
	Marc 'BlackJack' Rintsch


From bronger at physik.rwth-aachen.de  Fri Aug 24 10:17:27 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 24 Aug 2007 16:17:27 +0200
Subject: Co-developers wanted: document markup language
References: <mailman.247.1187961349.32294.python-list@python.org>
Message-ID: <874pip6mq0.fsf@wilson.homeunix.com>

Hall?chen!

David Boddie writes:

> On Fri Aug 24 11:04:33 CEST 2007, Torsten Bronger wrote:
>
>> Paul Rubin writes:
>> 
>>> TeX/LateX have been around forever and are well established
>>> standards, as awful as they are.  Why do we want ANOTHER markup
>>> language?
>> 
>> Well, because they are awful.  ;-) I don't see that there is a
>> bunch of already existing projects, in fact, I don't see anyone
>> challenging LaTeX at all.  However, competition is a good thing,
>> and I think there are enough aspects about LaTeX that can be done
>> better so that this project is worth being done.
>
> There are alternatives to LaTeX if you are prepared to look for
> them.  One of these is Lout:
>
>   http://lout.sourceforge.net/

I know Lout but its syntax is not simple enough to me.  Besides, it
does not enforce semantic markup.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From steve at holdenweb.com  Thu Aug  9 11:55:20 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Aug 2007 11:55:20 -0400
Subject: tests
In-Reply-To: <1186671660.912133.225810@l70g2000hse.googlegroups.com>
References: <mailman.1792.1186665714.22759.python-list@python.org>	<1186666919.456036.120270@d30g2000prg.googlegroups.com>	<f9f70t$dpm$1@solaris.cc.vt.edu>	<1186670584.148181.180040@r34g2000hsd.googlegroups.com>	<46bb2511$0$10103$7b0f0fd3@mistral.news.newnet.co.uk>
	<1186671660.912133.225810@l70g2000hse.googlegroups.com>
Message-ID: <f9fdd5$pqv$1@sea.gmane.org>

Jason wrote:
> On Aug 9, 8:46 am, "special_dragonfly" <Domi... at PLEASEASK.co.uk>
> wrote:
>> <dijkstra.ar... at gmail.com> wrote in message
>>> http://docs.python.org/lib/module-filecmp.html
>> My understanding of reading that is that it only looks at the file names
>> themselves and not their contents. So whether filename1=filename2 and in the
>> case of the function below it, whether one directory has files which are in
>> the other.
>> Correct me if I'm wrong.
>> Dom
>>
>> P.S. md5 or sha hash is what I'd go for, short of doing:
>>
>> MyFirstFile=file("file1.xls")
>> MySecondFile=file("file2.xls")
>> If MyFirstFile==MySecondFile:
>>     print "True"
>>
>> although this won't tell you where they're different, just that they are...
> 
> You're incorrect.  If the shallow flag is not given or is true, the
> results of os.stat are used to compare the two files, so if they have
> the same size, change times, etc, they're considered the same.
> 
> If the shallow flag is given and is false, their contents are
> compared.  In either case, the results are cached for efficiency's
> sake.
> 
>   --Jason
> 
> 
> The documentation for filecmp.cmp is:
>   cmp(  	f1, f2[, shallow])
>       Compare the files named f1 and f2, returning True if they seem
> equal, False otherwise.
> 
>       Unless shallow is given and is false, files with identical
> os.stat() signatures are taken to be equal.
> 
>       Files that were compared using this function will not be
> compared again unless their os.stat() signature changes.
> 
>       Note that no external programs are called from this function,
> giving it portability and efficiency.
> 

This discussion seems to assume that Excel spreadsheets are stored in 
some canonical form so that two spreads with the same functionality are 
always identical on disk to the last bit. I very much doubt this is true 
(consider as an example the file properties that can be set).

So really you need to define "equality". So far the tests discussed have 
concentrated on identifying identical files.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From robert.kern at gmail.com  Thu Aug 30 13:57:11 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 30 Aug 2007 12:57:11 -0500
Subject: list index()
In-Reply-To: <1188495863.242815.236900@o80g2000hse.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
Message-ID: <fb70du$lm2$1@sea.gmane.org>

zzbbaadd at aol.com wrote:
>> How could it not be an exception, in the plain English sense of the
>> word? Most certainly you're asking for the index because you want to do
>> something with the index. If the item is not found, you have no index,
>> so that's a special case that must be handled separately. There is no
>> logical difference between handling that special case in an except
>> clause versus handling it with an if-branch.
> 
> In my case of have done os.listdir() on two directories. I want to see
> what files are in directory A that are not in directory B.
> I have used exceptions in other languages and only do so on logic that
> should never happen.

Python is different than those languages. Exceptions are used much more
frequently in Python and often for things that will *definitely* happen not just
those things that shouldn't.

-- 
Robert Kern

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



From ldo at geek-central.gen.new_zealand  Mon Aug 27 07:34:09 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 27 Aug 2007 23:34:09 +1200
Subject: Error with long running web spider
References: <1187805496.980676.271830@l22g2000prc.googlegroups.com>
Message-ID: <faucmt$2o2$1@lust.ihug.co.nz>

In message <1187805496.980676.271830 at l22g2000prc.googlegroups.com>, Josh
Volz wrote:

> My problem is that I keep having an issue where the
> program appears to freeze.  Once this freezing happens the activity of
> the program drops to zero.  No exception is thrown or caught.  The
> program simply stops doing anything.  It even stops printing out its
> activity to stdout.

What happens afterwards? Does it continue running as though nothing had
happened? Throw an exception?

>From the output that appears beforehand, does it look like the freeze is
always happening in the same place?


From bbxx789_05ss at yahoo.com  Mon Aug  6 14:34:57 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 06 Aug 2007 11:34:57 -0700
Subject: udp, datagram sockets
In-Reply-To: <mailman.1682.1186419918.22759.python-list@python.org>
References: <1186416225.769753.307110@o61g2000hsh.googlegroups.com>
	<mailman.1682.1186419918.22759.python-list@python.org>
Message-ID: <1186425297.323634.52370@57g2000hsv.googlegroups.com>

On Aug 6, 11:05 am, Jean-Paul Calderone <exar... at divmod.com> wrote:
>
> The network is probably dropping some of your data, causing the server
> to never see the termination marker.  
>

As far as I can tell, the output disproves that notion.  If the
termination character were somehow lost in transmission, then this
statement:

        print "Received message:\n%s" % message[:-1]

would produce the output:


        Received message:
        hell

since the print statement chops off the last character of the received
data.



From pavlovevidence at gmail.com  Fri Aug 31 03:32:53 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 31 Aug 2007 03:32:53 -0400
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<1188534061.243009.89640@m37g2000prh.googlegroups.com>
	<1188539814.800466.6930@r23g2000prd.googlegroups.com>
Message-ID: <46d7ce80$0$18840$4c368faf@roadrunner.com>

On Thu, 30 Aug 2007 22:56:54 -0700, Russ wrote:

>> Python really isn't suitable for in-flight controls > for various
>> reasons, and mission critical concerns is a minor one (systems with
> 
> Do you know anything about the FAA certification process for flight-
> critical systems? I am not an expert on it, but I know it is very
> expensive. If I am not mistaken, getting such code certified is more
> expensive than developing it in the first place. Why would that be so
> if, as you claim, "mission critical concerns is a minor one"?

I made no such claim; you misconstrued what I wrote.  I wrote that 
mission critical concerns are a minor reason why Python is not used, not 
that mission critical concerns were minor.

As a matter of fact, FAA cert is a major pain, and they unit test the 
hell out of everything.  I'm not aware of any reason why Python couldn't 
be certified if it passed the tests, but it likely wouldn't pass as 
easily as a compiled language.  OTOH, spiffy features like design-by-
contract aren't going to improve your chances of getting FAA cert, either.


Carl Banks


From larry.bates at websafe.com  Mon Aug  6 16:04:08 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 06 Aug 2007 15:04:08 -0500
Subject: RTF 2 Tiff
In-Reply-To: <1186427712.284976.207560@d30g2000prg.googlegroups.com>
References: <1186427712.284976.207560@d30g2000prg.googlegroups.com>
Message-ID: <tLOdnWiKvpsq4yrbnZ2dnUVZ_qOknZ2d@comcast.com>

cjankowski at hbr-inc.com wrote:
> Hi all,
> I am trying to convert an RTF file to a Tiff image using Python.  This
> process will convert several hundred images daily.  Currently I am
> able to get the RTF file into a text format using Rtf2Txt.py, but I
> loose the images contained in the RTF file.  I have the same problem
> when I convert to .HTML using Rtf2Html.py.  I do not have a sample
> that I can share because of HIPPA regulations.  Can anyone please help
> me?
> 
> Thanks,
> 
> Chris J.
> 
Google turns up lots of solutions, but you didn't tell us what operating system
you are running on.  Most likely you will want to automate one of the off-the
shelf solutions rather than trying to roll your own.

-Larry


From jmtulloss at gmail.com  Thu Aug  9 05:00:27 2007
From: jmtulloss at gmail.com (Justin T.)
Date: Thu, 09 Aug 2007 09:00:27 -0000
Subject: Stackless Integration
Message-ID: <1186650027.043779.276520@i38g2000prf.googlegroups.com>

Hi,

I've been looking at stackless python a little bit, and it's awesome.
My question is, why hasn't it been integrated into the upstream python
tree? Does it cause problems with the current C-extensions? It seems
like if something is fully compatible and better, then it would be
adopted. However, it hasn't been in what appears to be 7 years of
existence, so I assume there's a reason.

Justin



From pablo.mitchell at gmail.com  Sat Aug  4 14:08:54 2007
From: pablo.mitchell at gmail.com (pablo.mitchell at gmail.com)
Date: Sat, 04 Aug 2007 11:08:54 -0700
Subject: Efficient Rank Ordering of Nested Lists
In-Reply-To: <1186158010.322959.47370@g4g2000hsf.googlegroups.com>
References: <1186104049.022836.253470@e9g2000prf.googlegroups.com>
	<1186158010.322959.47370@g4g2000hsf.googlegroups.com>
Message-ID: <1186250934.720441.12370@m37g2000prh.googlegroups.com>

On Aug 3, 9:20 am, pyscottish... at hotmail.com wrote:
> On Aug 2, 10:20 pm, "pablo.mitch... at gmail.com"
>
>
>
> <pablo.mitch... at gmail.com> wrote:
> > A naive approach to rank ordering (handling ties as well) of nested
> > lists may be accomplished via:
>
> >    def rankLists(nestedList):
> >       def rankList(singleList):
> >           sortedList = list(singleList)
> >           sortedList.sort()
> >           return map(sortedList.index, singleList)
> >       return map(rankList, nestedList)
>
> >    >>> unranked = [ [ 1, 2, 3, 4, 5 ], [ 3, 1, 5, 2, 4 ], [ -1.1, 2.2,
> > 0, -1.1, 13 ] ]
> >    >>> print rankLists(unranked)
>
> >    [[0, 1, 2, 3, 4], [2, 0, 4, 1, 3], [0, 3, 2, 0, 4]]
>
> > This works nicely when the dimensions of the nested list are small.
> > It is slow when they are big.  Can someone suggest a clever way to
> > speed it up?
>
> Isn't there something wrong with the ordering?
>
> Pablo's answers are:
> [ 1, 2, 3, 4, 5 ] == [0, 1, 2, 3, 4]  correct
>
> [ 3, 1, 5, 2, 4 ] == [2, 0, 4, 1, 3] wrong?
>
> [ -1.1, 2.2, 0, -1.1, 13 ] == [0, 3, 2, 0, 4] wrong?
>
> Doing it in my head I get:
> [ 3, 1, 5, 2, 4 ] == [ 1, 3, 0, 4, 2 ]
>
> [ -1.1, 2.2, 0, -1.1, 13 ] == [0, 3, 2, 1, 4]
>
> What gives?
>
> Did I misunderstand what "rank ordering (handling ties as well)" means?

There are many ways to skin this cat.  I am considering the following
approach:

http://en.wikipedia.org/wiki/Rank_order#Standard_competition_ranking_.28.221224.22_ranking.29



From no.0023 at gmail.com  Sat Aug 11 20:50:57 2007
From: no.0023 at gmail.com (No.23)
Date: Sun, 12 Aug 2007 00:50:57 +0000
Subject: Ligmail bug?
Message-ID: <20070812005057.GA15805@ob41.org>


#!/usr/bin/env python

import libgmail
from time import gmtime, strftime

fp = open('/tmp/python.list', 'w')
ga = libgmail.GmailAccount("No.0023 at gmail.com", "mypass")
ga.login()

result = self.ga.getMessagesByLabel('python.list', True)
result_len = len(result)
cnt = 0
if result_len:
    for thread in result:
        cnt += 1
        thread_len = len(thread)
        print 'Thread: %d/%d Msg: %d %s' % (cnt,
                                            result_len,
                                            thread_len, 
                                            thread.subject)
        for msg in thread:
            print '  Msg: %d/%d %s' % (msg.number, 
                                       thread_len, 
                                       msg.subject)
            source = msg.source.replace('\r','').lstrip()
            fp.write('From - ' + \
                      strftime("%a %b %d %H:%M:%S %Y", 
                      gmtime()) + '\n')
            fp.write(source)
            fp.write('\n\n')

Thread: 1/1244 Msg: 7 \u003cb\>Deleting objects on the fly\u003c/b\>
  Msg: 1/7 Deleting objects on the fly
  Msg: 2/7 Re: Deleting objects on the fly
  Msg: 3/7 Re: Deleting objects on the fly
  Msg: 4/7 Re: Deleting objects on the fly
  Msg: 5/7 Re: Deleting objects on the fly
  Msg: 6/7 Re: Deleting objects on the fly
  Msg: 7/7 Re: Deleting objects on the fly
Thread: 2/1244 Msg: 1 \u003cb\>A new french book on Python\u003c/b\>
  Msg: 1/1 A new french book on Python
Thread: 3/1244 Msg: 14 \u003cb\>Destruction of generator objects\u003c/b\>
  Msg: 1/14 Destruction of generator objects
  Msg: 2/14 Re: Destruction of generator objects
  Msg: 3/14 Re: Destruction of generator objects
  Msg: 4/14 Re: Destruction of generator objects
  Msg: 5/14 Re: Destruction of generator objects
  Msg: 6/14 Re: Destruction of generator objects
  Msg: 7/14 Re: Destruction of generator objects
  Msg: 8/14 Re: Destruction of generator objects
  Msg: 9/14 Re: Destruction of generator objects
  Msg: 10/14 Re: Destruction of generator objects
  Msg: 11/14 Re: Destruction of generator objects
  Msg: 12/14 Re: Destruction of generator objects
  Msg: 13/14 Re: Destruction of generator objects
  Msg: 14/14 Re: Destruction of generator objects
......
Thread: 307/1244 Msg: 1 MailingLogger 3.2.0 Released!
   Msg: 1/1 MailingLogger 3.2.0 Released!
 Thread: 308/1244 Msg: 13 Why no maintained wrapper to Win32?
   Msg: 1/13 Why no maintained wrapper to Win32?
   Msg: 2/13 Re: Why no maintained wrapper to Win32?
   Msg: 3/13 Re: Why no maintained wrapper to Win32?
   Msg: 4/13 Re: Why no maintained wrapper to Win32?
   Msg: 5/13 Re: Why no maintained wrapper to Win32?
   Msg: 6/13 Re: Why no maintained wrapper to Win32?
   Msg: 7/13 Re: Why no maintained wrapper to Win32?
   Msg: 8/13 Re: Why no maintained wrapper to Win32?
   Msg: 9/13 Re: Why no maintained wrapper to Win32?
   Msg: 10/13 Re: Why no maintained wrapper to Win32?
   Msg: 11/13 Re: Why no maintained wrapper to Win32?
   Msg: 12/13 Re: Why no maintained wrapper to Win32?
   Msg: 13/13 Re: Why no maintained wrapper to Win32?
 Thread: 309/1244 Msg: 5 Encryption recommendation
   Msg: 1/5 Encryption recommendation
   Msg: 2/5 Re: Encryption recommendation
   Msg: 3/5 Re: Encryption recommendation
   Msg: 4/5 Re: Encryption recommendation
   Msg: 5/5 Re: Encryption recommendation
 Thread: 310/1244 Msg: 3 Simple question about logging module.
   Msg: 1/3 Simple question about logging module.
   Msg: 2/3 Re: Simple question about logging module.
   Msg: 3/3 Re: Simple question about logging module.
 Thread: 311/1244 Msg: 5 Plotting Images
   Msg: 1/5 Plotting Images
   Msg: 2/5 Re: Plotting Images
   Msg: 3/5 Re: Plotting Images
   Msg: 4/5 Re: Plotting Images
   Msg: 5/5 Re: Plotting Images
 Thread: 312/1244 Msg: 33 From D
 Thread: 313/1244 Msg: 4 get directory and file names
 Thread: 314/1244 Msg: 7 Compiling 2.5.1 on OpenBSD 4.1
 Thread: 315/1244 Msg: 2 how to add a toolbar to a Frame using wxpython
 Thread: 316/1244 Msg: 1 create a toolbar + images using wxpython for windows
 Thread: 317/1244 Msg: 4 Pysqlite storing file as blob example
 Thread: 318/1244 Msg: 1 Nasm_with_C++_with_Python
 Thread: 319/1244 Msg: 2 interaction of 'with' and 'yield'
 Thread: 320/1244 Msg: 5 problems with logging module
 Thread: 321/1244 Msg: 5 win32 question in Python
 Thread: 322/1244 Msg: 6 File handle not being released by close
 Thread: 323/1244 Msg: 6 Replacing overloaded functions with closures.
 Thread: 324/1244 Msg: 1 Where can I get a complete user interface about pylibpcap?
 Thread: 325/1244 Msg: 7 making a variable available in a function from decoratorThread: 326/1244 Msg: 1 www.cerocom.com
 Thread: 327/1244 Msg: 6 OOP in Python book?
 Thread: 328/1244 Msg: 3 Help text embedding in C code?
 Thread: 329/1244 Msg: 16 128 or 96 bit integer types?
 Thread: 330/1244 Msg: 2 Re: yield keyword usage
 Thread: 331/1244 Msg: 11 How to write GUI and event separately in wxPython??
 Thread: 332/1244 Msg: 2 ?????????Watch Satellite Channels on your PC - FREE!?????????
 Thread: 333/1244 Msg: 3 Database objects? Persistence? Sql Server woes
 Thread: 334/1244 Msg: 5 Bug? exec converts '\n' to newline in docstrings!?
 Thread: 335/1244 Msg: 1 RE: Free support for Python developers
 Thread: 336/1244 Msg: 1 Python-URL! - weekly Python news and links (Jul 30)
 Thread: 337/1244 Msg: 4 Making Gridded Widgets Expandable
 Thread: 338/1244 Msg: 3 pythonic parsing of URL
 Thread: 339/1244 Msg: 13 Detecting __future__ features
 Thread: 340/1244 Msg: 5 Events: The Python Way
 Thread: 341/1244 Msg: 4 Cross platform Python app deployment
 Thread: 342/1244 Msg: 4 encode/decode misunderstanding
 Thread: 343/1244 Msg: 1 Professional Grant Proposal Writing Workshop (September 2007: Simon Fraser University)
 Thread: 344/1244 Msg: 8 Hex editor display - can this be more pythonic?
 Thread: 345/1244 Msg: 1 import struct in Python z/OS
 Thread: 346/1244 Msg: 9 wxGlade: Who knows how to drive this application?
 Thread: 347/1244 Msg: 28 Any reason why cStringIO in 2.5 behaves different from 2.4?
 Thread: 348/1244 Msg: 15 Installing mod_python on mac os 10.4.7
 Thread: 349/1244 Msg: 1 Xinetd &amp; python server script. problem to get data from from client
 Thread: 350/1244 Msg: 2 ctypes:passing python class instances through c and backThread: 351/1244 Msg: 2 Bug in cPickle with packages and 'object' inherited class
 Thread: 352/1244 Msg: 1 What is the difference about &quot;pycap&quot; and &quot;pylibpcap&quot;?
 Thread: 353/1244 Msg: 1 Important new release (was: Crunchy security advisory)
 Thread: 354/1244 Msg: 5 Understanding mxODBC Insert Error
 Thread: 355/1244 Msg: 4 Split a string based on change of character
 Thread: 356/1244 Msg: 5 Python 2.5.1 can't find win32file?
 Thread: 357/1244 Msg: 2 interpreter in the background
 Thread: 358/1244 Msg: 5 Compiling python2.5.1 results in 3.5MB python lib?
 Thread: 359/1244 Msg: 7 problem with change to exceptions
 Thread: 360/1244 Msg: 1 Why Is This The Best Program Online ?
 Thread: 361/1244 Msg: 3 How to stop print printing spaces?
 Thread: 362/1244 Msg: 5 this must be a stupid question ...
 Thread: 363/1244 Msg: 2 Memory utilization (linux v. openbsd)
 Thread: 364/1244 Msg: 1 Test-driven design (was: Comparing Dictionaries)
 Thread: 365/1244 Msg: 1 Crunchy security advisory
 Thread: 366/1244 Msg: 1 http://MoneyCertain.com
 Thread: 367/1244 Msg: 1 ??????????????????FREE Satellite TV on your PC??????????????????
 Thread: 368/1244 Msg: 1 great new site for IT GURUS - www.itkong.com
 Thread: 369/1244 Msg: 5 Tkinter -- Show Data in an Excel like Read-Only Grid
 Thread: 370/1244 Msg: 11 a simple string question
 Thread: 371/1244 Msg: 2 How to write a warning to my log file?
 Thread: 372/1244 Msg: 3 How to programmatically insert pages into MDI.
 Thread: 373/1244 Msg: 3 Tkinter program with a usable interpreter console
 Thread: 374/1244 Msg: 2 slow emails
 Thread: 375/1244 Msg: 2 Wikicodia - The code snippets wiki
 Thread: 376/1244 Msg: 6 Compile python with Mingw
 Thread: 377/1244 Msg: 10 removing items from a dictionary ?
 Thread: 378/1244 Msg: 4 Reading data from an ISA port
 Thread: 379/1244 Msg: 4 Removing certain tags from html files
 Thread: 380/1244 Msg: 6 Imported globals?
 Thread: 381/1244 Msg: 3 Packages
 Thread: 382/1244 Msg: 7 Factory pattern again
 Thread: 383/1244 Msg: 2 curses/urwid simple menu
 Thread: 384/1244 Msg: 7 adding a docstring to an instancemethod
 Traceback (most recent call last):
   File "/home/thoujean/bin/gmail.py", line 195, in <module>
     client.archive_list(options.update, options.label)
   File "/home/thoujean/bin/gmail.py", line 142, in archive_list
     self.archive_label(label, update)
   File "/home/thoujean/bin/gmail.py", line 106, in archive_label
     for msg in thread:
   File "/usr/local/lib/python2.5/site-packages/libgmail-0.1.6-py2.5.egg/libgmail.py", line 1389, in __iter__
     self._messages = self._getMessages(self)
   File "/usr/local/lib/python2.5/site-packages/libgmail-0.1.6-py2.5.egg/libgmail.py", line 1412, in _getMessages
     q = "in:anywhere")
   File "/usr/local/lib/python2.5/site-packages/libgmail-0.1.6-py2.5.egg/libgmail.py", line 429, in _parseSearchResult
     return self._parsePage(_buildURL(**params))
   File "/usr/local/lib/python2.5/site-packages/libgmail-0.1.6-py2.5.egg/libgmail.py", line 402, in _parsePage
     items = _parsePage(self._retrievePage(urlOrRequest))
   File "/usr/local/lib/python2.5/site-packages/libgmail-0.1.6-py2.5.egg/libgmail.py", line 383, in _retrievePage
     resp = self.opener.open(req)
   File "/usr/local/lib/python2.5/urllib2.py", line 374, in open
     response = self._open(req, data)
   File "/usr/local/lib/python2.5/urllib2.py", line 392, in _open
     '_open', req)
   File "/usr/local/lib/python2.5/urllib2.py", line 353, in _call_chain
     result = func(*args)
   File "/usr/local/lib/python2.5/urllib2.py", line 1109, in https_open
     return self.do_open(httplib.HTTPSConnection, req)
   File "/usr/local/lib/python2.5/urllib2.py", line 1076, in do_open
     raise URLError(err)
 urllib2.URLError: <urlopen error (-3, 'temporary failure in name resolution')>


other information:
Shell:~ >: uname -a
OpenBSD ob41.org 4.1 ob41#0 i386
Shell:~ >: python
Python 2.5 (r25:51908, Mar  8 2007, 20:46:47)
[GCC 3.3.5 (propolice)] on openbsd4
Type "help", "copyright", "credits" or "license" for more information.
>>>
>>> import libgmail
>>> print libgmail.Version
0.1.6
>>>


-- 
Best Regards,
	No.23
----
No.0023 at gmail.com


From arkanes at gmail.com  Thu Aug 30 14:04:13 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 30 Aug 2007 13:04:13 -0500
Subject: Is LOAD_GLOBAL really that slow?
In-Reply-To: <1188495447.083333.271540@q4g2000prc.googlegroups.com>
References: <aac2c7cb0708291823h15e3f675mbeae9ecf37d653b6@mail.gmail.com>
	<mailman.130.1188441225.28954.python-list@python.org>
	<1188495447.083333.271540@q4g2000prc.googlegroups.com>
Message-ID: <4866bea60708301104vfb45180oe7e8c277730e6b57@mail.gmail.com>

On 8/30/07, Rhamphoryncus <rhamph at gmail.com> wrote:
> On Aug 29, 8:33 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> > On Wed, 2007-08-29 at 19:23 -0600, Adam Olsen wrote:
> > There is no loop overhead here, and after subtracting the function call
> > overhead, I get 31 nanoseconds per local lookup and 63 nanoseconds per
> > global lookup, so local lookups are just about twice as fast as global
> > lookups.
> >

__builtins__ lookups are an extra dict lookup slower than just global
variables, too. Don't forget those.


> > True, whether this difference is significant does depend on how many
> > name lookups your code makes and how much else it's doing, but if you're
> > doing a lot of number crunching and not a lot of I/O, the difference
> > might be significant. Also, even if using local names is only slightly
> > faster than using globals, it's still not slower, and the resulting code
> > is still more readable and more maintainable. Using locals is a win-win
> > scenario.
>
> You get very small speed gains (assuming your code is doing anything
> significant), for a lot of effort (trying out different options,
> seeing if they're actually faster on different boxes.)  The
> readability cost is there, even if it is smaller than many of the
> other obfuscations people attempt.  If the speed gains were really
> that important you should rewrite in C, where you'd get far greater
> speed gains.
>

I've doubled the speed of a processing loop by moving globals lookups
out of the loop. Rewriting in C would have taken at least a day, even
with Pyrex, localizing the lookup took about 2 minutes.

> So it only seems worthwhile when you really, *really* need to get a
> slight speedup on your box, you don't need to get any more speedup
> than that, and C is not an option.
>

It's not a huge optimization, but it's really easy to write if you
don't mind adding fake kwargs to your functions. Just for the heck of
it I also wrote a decorator that will re-write the bytecode so that
any global that can be looked up at function definition will be
re-written as a local (actually with LOAD_CONST). You can see it at
http://code.google.com/p/wxpsvg/wiki/GlobalsOptimization. Disclaimer:
While I've tested it with a variety of functions and it's never broken
anything, I've never actually used this for anything except an
intellectual exercise. Use at your own risk.

> Fwiw, I posted this after developing yet another patch to optimize
> global lookups.  It does sometimes show an improvement on specific
> benchmarks, but overall it harms performance.  Looking into why, it
> doesn't make sense that a python dictionary lookup can have less cost
> than two simple array indexes, but there you go.  Python dictionaries
> are already damn fast.
>

I certainly believe that changes to pythons internals to try to make
LOAD_GLOBAL itself faster can be difficult, with even "obvious"
optimizations ending up slower. However, LOAD_FAST (and LOAD_CONST)
are faster than LOAD_GLOBAL and, for the reason you just stated, is
unlikely to change.


From Shawn at Milochik.com  Mon Aug 20 16:14:50 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Mon, 20 Aug 2007 16:14:50 -0400
Subject: reading a line in file
In-Reply-To: <46C9F561.50405@jayloden.com>
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>
	<2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx>
	<2dc0c81b0708201207p7f83f2e0l6de15fd70be252a5@mail.gmail.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2B6@efmailx>
	<46C9F561.50405@jayloden.com>
Message-ID: <2dc0c81b0708201314q727ca3a1s12bef74a25b20abc@mail.gmail.com>

Everybody hates regexes. Except me. Discrimination!


From kw at codebykevin.com  Mon Aug  6 13:55:41 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Mon, 06 Aug 2007 13:55:41 -0400
Subject: wxWindows - incorrect path on installation?
In-Reply-To: <1186422861.132899.50060@g4g2000hsf.googlegroups.com>
References: <1186422861.132899.50060@g4g2000hsf.googlegroups.com>
Message-ID: <46B7609D.2030404@codebykevin.com>

frikk wrote:
> This should be a very simple one, sorry!
> 
> I installed wxWindows on my OS X box but I am unable to get my python
> install to recognize the module.  Unfortunately I don't know a whole
> lot about where modules install to or how to configure python to see
> them.  IE: 'import wx' does not work - it says unknown module wx.
> 
> Do I need to tweak a path variable or something?
> 
> I have MacPython installed and the binary of wxWindows (wxPython) from
> wxpython.com
> 
> Thanks guys,
> Blaine
> 
What version of wxPython did you install? I don't think any of them are 
configured to work with Apple's system-installed Python--you would need 
to install Python 2.5 from the Python.org website.

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From jjl at pobox.com  Thu Aug  9 17:41:32 2007
From: jjl at pobox.com (John J. Lee)
Date: Thu, 09 Aug 2007 21:41:32 GMT
Subject: Screenscraping, in python, a web page that requires javascript?
References: <pan.2007.08.09.21.26.19.132419@datallegro.com>
Message-ID: <87d4xw2xo4.fsf@pobox.com>

Dan Stromberg - Datallegro <dstromberg at datallegro.com> writes:

> Is there a method, with python, of screenscraping a web page, if that web
> page uses javascript?

Not pure CPython, no.


> I know about BeautifulSoup, but AFAIK at this time, BeautifulSoup is for
> HTML that doesn't have embedded javascript.

It's not that BeautifulSoup is unhappy with JS, it's just that there's
no support for executing the JS.

There are some Java libraries that know how to execute JS embedded in
web pages, which could be used from Jython:

http://www.thefrontside.net/crosscheck

http://htmlunit.sourceforge.net/

http://httpunit.sourceforge.net/


You can also automate a browser, but that still seems to be painful in
one way or another.


John


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug  3 04:20:59 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 03 Aug 2007 10:20:59 +0200
Subject: (no) fast boolean evaluation ?
In-Reply-To: <mailman.1551.1186099243.22759.python-list@python.org>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>	<cfb58d850708021619s298f69b9p3af86905d1695939@mail.gmail.com>
	<mailman.1551.1186099243.22759.python-list@python.org>
Message-ID: <46b2e56b$0$18879$426a74cc@news.free.fr>

Joshua J. Kugler a ?crit :
> On Thursday 02 August 2007 15:19, Evan Klitzke wrote:
>>> I discovered that boolean evaluation in Python is done "fast"
>>> (as soon as the condition is ok, the rest of the expression is ignored).
>> This is standard behavior in every language I've ever encountered.
> 
> Then you've never programmed in VB (at least 6, don't know if .net still
> does this).  Nested IF statements. AAAAAAAAAAAAAAAAAAAACK! 

I do remember an even brain-deadiest language that not only didn't 
short-circuit boolean operators but also didn't have an "elif" statement...



From robert.kern at gmail.com  Wed Aug 22 13:44:50 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 22 Aug 2007 12:44:50 -0500
Subject: What Are These Import/From Statements about?
In-Reply-To: <un_yi.34471$2v1.24183@newssvr14.news.prodigy.net>
References: <un_yi.34471$2v1.24183@newssvr14.news.prodigy.net>
Message-ID: <fahsmj$cp4$1@sea.gmane.org>

W. Watson wrote:
> Is there a single source that explains these statements?

http://docs.python.org/tut/node8.html

-- 
Robert Kern

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



From cai.haibin at gmail.com  Wed Aug 22 01:52:37 2007
From: cai.haibin at gmail.com (james_027)
Date: Wed, 22 Aug 2007 05:52:37 -0000
Subject: for statement on empty iterable
In-Reply-To: <7xejhw15r9.fsf@ruckus.brouhaha.com>
References: <1187760507.951994.50310@q4g2000prc.googlegroups.com>
	<7xabsk3zgm.fsf@ruckus.brouhaha.com>
	<1187761270.713307.224570@i38g2000prf.googlegroups.com>
	<7xejhw15r9.fsf@ruckus.brouhaha.com>
Message-ID: <1187761957.636211.107060@x40g2000prg.googlegroups.com>

hi,

> It sounds like you're just starting to learn the language... have you
> read the online tutorial yet?  That is a pretty easy introduction.
>
> See:http://python.org/doc/
>
> Anyway, you can say
>
>    for i in (1,2,3):
>       print i*5
>
> to print 5, 10, and 15 on separate lines, for example.

Yes i am new to python :). I am sorry I should be clarify myself ...
for example

l = ['j', 'a', 'm', 'e', 's']

for i in l
 # i want to know the nth number of times it has loop thru or
something like counter?

Thanks
james



From no at spam.com  Thu Aug  2 15:11:20 2007
From: no at spam.com (Farshid Lashkari)
Date: Thu, 02 Aug 2007 12:11:20 -0700
Subject: Catching SystemExit in C API code when embedding Python?
In-Reply-To: <20070802141906.2581c099@cube.tz.axivion.com>
References: <20070802141906.2581c099@cube.tz.axivion.com>
Message-ID: <m%psi.3186$Mu5.909@newsfe15.phx>

Stefan Bellon wrote:
> Hi all!
> 
> I am embedding Python into a GUI application in a way that the GUI is
> scriptable using Python.
> 
> Now I have come to a problem that when the user puts a "sys.exit(0)"
> into his script to end the script, not only the script is terminated,
> but also the GUI application itself. This is not the intended behaviour.
> 
> As in Python itself you can catch SystemExit, I think this should be
> the way to go. But how do I catch this exception from within the C API?
> 
> Thanks in advance for any hints.
> 

Have a look at the following doc page for handling exceptions with the C 
api:

http://docs.python.org/api/exceptionHandling.html

Also, here is some sample code that will catch system exit exceptions:

//Call python code
...
//Check for system exit exception
if(PyErr_Occurred()) {
     if(PyErr_ExceptionMatches(PyExc_SystemExit)) {
         //handle system exit
         PyErr_Clear();
     } else {
         PyErr_Print();
     }
}


From steve at holdenweb.com  Thu Aug  2 12:22:39 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Aug 2007 12:22:39 -0400
Subject: python 3.0, pywin32 and scipy
In-Reply-To: <1186070475.659511.24130@q3g2000prf.googlegroups.com>
References: <1186070475.659511.24130@q3g2000prf.googlegroups.com>
Message-ID: <f8t0ch$k2m$1@sea.gmane.org>

vml wrote:
> Hello,
> 
> 
> I am trying to promote python in my job, my collegue only see matlab
> and microsoft scripting language.
> I understood that there willl be no backward compatibility between
> python 2.x and 3.0, does it means that:
> 
> - my script using pywin32 for the COM layer and scipy for the maths
> won't work under 3.0
> - will we have the equivalent of pywin32 and scipy in python ?
> 
> I will be incharge of designing a python module which will be a
> 'matrix calculator' in our current software. Will it be compatible
> with python 3.0 ? I guess no.
> 
> What can I answer to my collegue who will say 'Python is changing and
> the stuff you are doing now is useless'?
> 
> how can I argue against matlab and c# ?
> 
> thanks very much
> 
Tell them that the majority of incompatibilities will be taken care of 
by an automated translation mechanism, and that the 2.X range will be 
maintained in parallel with the 3.X range, with features backported when 
it is feasible to do so, so there will be no *need* to migrate to 3.X 
until *at least* 3.1 (which will likely take us two years into the future).

You might also remind them that Microsoft have continually broken 
backwards compatibility, and that this is a one-off deal that will make 
Python better and more consistent (not that they'll be interested in 
that, since they seem to have closed minds).

Finally, look for Python users who have migrated from Matlab (of which 
there are many) and get their opinions on why. I have used C# on a 
couple of projects now and it's an OK language, but it can't hold a 
candle to Python, which is now firmly in the .NET environment with 
Microsoft's IronPython open source implementation.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From limodou at gmail.com  Tue Aug 21 09:55:07 2007
From: limodou at gmail.com (limodou)
Date: Tue, 21 Aug 2007 21:55:07 +0800
Subject: IDE for Python
In-Reply-To: <1187698999.545439.322600@k79g2000hse.googlegroups.com>
References: <mailman.55.1187690455.32294.python-list@python.org>
	<1187698999.545439.322600@k79g2000hse.googlegroups.com>
Message-ID: <505f13c0708210655g36ce7cf1m2cb089ce974983e1@mail.gmail.com>

On 8/21/07, king kikapu <aboudouvas at panafonet.gr> wrote:
> On Aug 21, 12:00 pm, Joel Andres Granados <joel.grana... at gmail.com>
> wrote:
> > Hello list:
> >
> > I have tried various times to use an IDE for python put have always been
> > disapointed.
>
>
> I have also tried a lot of them (IDEs) in the last year. I was finally
> happy with Eclipse/Pydev but i was always wanted a more "true" IDE for
> Python.
> I think i found it in Eric4 http://www.die-offenbachs.de/eric/index.html
> You can download from here http://www.riverbankcomputing.co.uk/pyqt/download.php
> (binary installer for Windows that contains Eric and PyQt)
> and have a look at it!
>
Maybe someone can try UliPad, I just release 3.7 version a few days before.

-- 
I like python!
UliPad <<The Python Editor>>: http://code.google.com/p/ulipad/
My Blog: http://www.donews.net/limodou


From nepbabucxspamfree at yahoo.ca  Tue Aug 21 08:38:24 2007
From: nepbabucxspamfree at yahoo.ca (Bikal KC)
Date: Tue, 21 Aug 2007 22:08:24 +0930
Subject: C# and Python
In-Reply-To: <1187693349.890687.203900@50g2000hsm.googlegroups.com>
References: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
	<1187693349.890687.203900@50g2000hsm.googlegroups.com>
Message-ID: <46cadcb7$1_4@news.chariot.net.au>

>From Eric CHAO [accidently sent to me]:

Maybe you could try IronPython. It's another implement in .NET
platform. Not 100% compatible but for sorting, that's ok. I think it's
a better way to use GUI that .NET provide.

And if you download VS 2005 SDK, there is many demo projects about
IronPython.

On 8/21/07, Bikal KC <nepbabucxspamfree at yahoo.ca> wrote:
> > subeen wrote:
> >
>> > > When the user clicks Quick Sort button, the quicksort.py will be
>> > > called and it will sort the numbers.
> >
> > One way to do this:
> > In your C# app, have the mouse click event handler call python
> > interpreter "/path/to/python /path/to/quicksort.py". Make quicksort.py
> > write to a file the result. After the quicksort.py finishes, read the
> > file from your normal C# app.
> >
> > Cheers.
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >




From ldo at geek-central.gen.new_zealand  Fri Aug 31 19:33:32 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 11:33:32 +1200
Subject: Is there a simple way to exit a while loop on keystroke?
References: <1188578827.809840.90100@r29g2000hsg.googlegroups.com>
Message-ID: <fba8bo$331$1@lust.ihug.co.nz>

In message <1188578827.809840.90100 at r29g2000hsg.googlegroups.com>, gsxg
wrote:

> I am new to python, and have written a simple program to read a port
> via telnet.  I would like it to run until any key is pressed.

Did you mean "telnet" or did you mean "local terminal"? For a local
terminal, the following demo script should give you a starting point:

#!/usr/bin/python

import sys
import select
import termios
import tty

timeout = 0.0 # nonzero to wait that long for keypress

save_attrs = termios.tcgetattr(sys.stdin.fileno())
  # save terminal settings for restoration--note that this script
  # doesn't currently trap CTRL/C, so settings will not be properly
  # restored if that is hit
tty.setcbreak(sys.stdin.fileno())
  # or can use setraw to block CTRL/C
while True :
    (input_ready, _, _) = select.select((sys.stdin,), (), (), timeout)
    if sys.stdin in input_ready :
        break
    #end if
    sys.stdout.write("Running...\n")
#end while
termios.tcsetattr(sys.stdin.fileno(), termios.TCSAFLUSH, save_attrs)
sys.stdout.write("Finished.\n")



From philippe.martin at att.net  Mon Aug 27 00:59:54 2007
From: philippe.martin at att.net (hg)
Date: Mon, 27 Aug 2007 04:59:54 GMT
Subject: ANN: SCF released to GPL
In-Reply-To: <ZBnAi.21498$eY.43@newssvr13.news.prodigy.net>
References: <ZBnAi.21498$eY.43@newssvr13.news.prodigy.net>
Message-ID: <eTsAi.47761$Um6.13147@newssvr12.news.prodigy.net>

hg wrote:
> Dear all,
> 
> I am releasing much of my work including SCF (Cross platform Smart Card
> library & Tools written in Python) to the GPL license.
> 
> If interested, go to http://www.SnakeCard.com/Source.html
> 
> I am moving the doc to doxygen and cleaning up the code, so what you'll see
> there will change in the course of the next few weeks - basically can only
> get meaningful info on the classes hierarchy at this stage.
> I am looking for a free subversion server resource to put the code ... if
> you know of any.
> 
> Some of the work there will be windows-only related (GINA, activeX
> components ... and not coded in Python) and the applets JavaCard and
> BasicCard ... I'm releasing these during the next few days.
> 
> Regards,
> 
> hg 
PS: I apologize for the "spam" ... I just changed ISP .. and my initial 
post did not make it (or so I thought) ... sorry.


From rcdailey at gmail.com  Sat Aug 11 18:59:39 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Sat, 11 Aug 2007 17:59:39 -0500
Subject: Binary, Hex, and Decimal string conversions
Message-ID: <496954360708111559s1cef4212pabd14e95b27435ea@mail.gmail.com>

Hi, I was wondering if there is a built in module that supports conversion
in any direction between Binary, Hex, and Decimal strings? Thanks.
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From info at thegrantinstitute.com  Wed Aug  8 06:06:11 2007
From: info at thegrantinstitute.com (Anthony Jones)
Date: 08 Aug 2007 03:06:11 -0700
Subject: Professional Grant Proposal Writing Workshop (September 2007: Simon
	Fraser University)
Message-ID: <20070808030605.7DDE7E991CD85D5A@thegrantinstitute.com>

An HTML attachment was scrubbed...
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From JYOUNG79 at kc.rr.com  Fri Aug  3 11:22:05 2007
From: JYOUNG79 at kc.rr.com (JYOUNG79 at kc.rr.com)
Date: Fri, 03 Aug 2007 10:22:05 -0500
Subject: xlrd question
Message-ID: <c55684e23177b.3177bc55684e2@rdc-kc.rr.com>

When running 'python setup.py install' to install items for xlrd to work, does anybody know 
what items are 
installed and where items are installed at on a Mac (OS 10.4)?  I'm assuming it mainly uses 
things out of the xlrd 
folder, but was curious if it copies files to other locations.

Thanks.

Jay


From walterbyrd at iname.com  Tue Aug 28 14:49:07 2007
From: walterbyrd at iname.com (walterbyrd)
Date: Tue, 28 Aug 2007 11:49:07 -0700
Subject: Is it reasonably easy easy to something like this with python?
Message-ID: <1188326947.527698.245770@r23g2000prd.googlegroups.com>

This is made with a php5 framework called qcodo.

http://examples.qcodo.com/examples/dynamic/inline_editing.php

With qcodo it's easy to make grids that are sortable and inline
editable. Qcodo grids work from the database - not an xml table or
array. Qcodo handles complex data relations, and fairly large
datadabes.

I like python better than php, but I don't know of any python tools to
create these sorts of grids.



From no.reply at here.com  Sun Aug 19 20:33:36 2007
From: no.reply at here.com (Anonymous)
Date: Mon, 20 Aug 2007 01:33:36 +0100
Subject: Python question (PyNoob)
Message-ID: <3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d@bt.com>

I have exp with C/C++ (and a few other langs). I want to use Python to 
start doing the ff:

1). Data Munging (text processing) - instead of Perl
2). Automating my build process
3). (Possibly) some web data retrieval jobs

Can anyone point me to resurces/possibly scripts that can get me up to 
speed (to do these 3 things) ASAP, without having to learn the basics of 
programming?


From Andy.cheesman at bristol.ac.uk  Thu Aug  2 12:16:15 2007
From: Andy.cheesman at bristol.ac.uk (Andy Cheesman)
Date: Thu, 02 Aug 2007 17:16:15 +0100
Subject: beginner in python
In-Reply-To: <f8ro29$gl2$1@sea.gmane.org>
References: <aa405c1f0708012127j471c9b2dl35b74cda9f595d09@mail.gmail.com>
	<f8ro29$gl2$1@sea.gmane.org>
Message-ID: <46B2034F.10703@bristol.ac.uk>

It looks like you are doing some sort of molecular science thing.
Have you come across openbabel and the python bindings pybel
(http://openbabel.sourceforge.net/wiki/Python#Pybel). I don't know how
well they work but they might save you some effort. Also, check out
pymol,(http://pymol.sourceforge.net/) they might have some of the
functionality which you desire already coded!

HTH
Andy

Steve Holden wrote:
> Beema shafreen wrote:
>> hi everybody,
>>    I am beginner in python
>>  I have to calculate the euclidean distance between the atoms from a pdb 
>> file
>> i have written the the code and its shows me some error ,
>> the code:
>> import re
>> import string
>> import math
>> ab =[]
>> x_value = []
>> y_value = []
>> z_value = []
>> fh = open("1K5N.pdb",'r')
>> for atom in fh.readlines():
>>    a = atom.strip()
>>    pattern= re.compile('^ATOM.*')
>>    atom_file= pattern.search(a)
>>    if  atom_file:
>>        atom_data = atom_file.group()
>>        x_coordinate = atom_data[31:38]
>>        y_coordinate = atom_data[39:46]
>>        z_coordinate = atom_data[47:54]
>>        x_value.append(x_coordinate)
>>        y_value.append(y_coordinate)
>>        z_value.append(z_coordinate)
>> for x in range(len(x_value)):
>>              x_co = float(x_value[x])-float(x_value[x+1])
>>              y_co = float(y_value[x])-float(y_value[x+1])
>>              z_co = float(z_value[x])-float(z_value[x+1])
>>              data = math.sqrt(x_co)*(x_co)+(y_co)*(y_co)+(z_co)*(z_co)
>>              print data
>> ~
>> and the error ,message
>>  File "pdb_fetching.py", line 22, in ?
>>     x_co = float(x_value[x])-float(x_value[x+1])
>> IndexError: list index out of range
>>
>>
>> can you suggest me the mistake i have made
>>
> suppose you have an x_value list of length 6. Valid indexes go from 0 to 
> 5. Then x is going to start at 0 and go up to 5. The last time around 
> the loop the expression "x_value[x+1]" is going to try and use 6 as an 
> index, thus trying to address past the end of the list.
> 
> Since the data values are the RMS differences between successive points, 
> there are only five differences for a six-element list.
> 
> Try using
> 
>      for x in range(len(x_value)-1):
> 
> instead.
> 
> By the way, you presented your question very well - all necessary 
> information was there, and you didn't put in any mistaken guesses about 
> what might be going wrong. Well done, and welcome to Python! You will 
> find you can learn it very quickly.
> 
> regards
>   Steve


From shawn.o.weekly at gmail.com  Mon Aug  6 14:01:16 2007
From: shawn.o.weekly at gmail.com (bhamdeveloper)
Date: Mon, 06 Aug 2007 11:01:16 -0700
Subject: can't import SimpleXMLRPCDisptacher from SimpleXMLRPCServer
Message-ID: <1186423276.861160.63610@g4g2000hsf.googlegroups.com>

from my server I can't import SimpleXMLRPCDispatcher.  please see
http://intertubewaypoint.com/metaweblog/ for the stacktrace/error
message.  This onle happens on my server; I am trying to integrate the
metaweblog api into my blog and it is barfing when trying to get that
dispatcher.  Anyone seen this and have a quick fix?



From theller at ctypes.org  Thu Aug 16 11:39:30 2007
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 16 Aug 2007 17:39:30 +0200
Subject: ctypes and C99 complex numbers
In-Reply-To: <1187266067.24753.12.camel@wheeler.hlphys.uni-linz.ac.at>
References: <1187266067.24753.12.camel@wheeler.hlphys.uni-linz.ac.at>
Message-ID: <fa1r3j$jv6$1@sea.gmane.org>

Eugen Wintersberger schrieb:
> Hi there
>  I want to use ctypes in connection with C functions that use complex
> datatypes defined in the C99 standard. Does someone know a simple way
> how to implement this? Are there any plans to integrate the C99 complex
> data types in the ctypes module?

I have investigated the complex data types a bit and came to the conclusion
that libffi (which ctypes is based upon) would have to be extended to
support these complex types.  I have not looked into the newer libffi
sources to find out if this support already has been added, ctypes uses
an older version of libffi.

By experimenting I found out that on some systems (x86 linux and x86_64 linux)
I could 'emulate' the complex type by defining a structure:

class Complex(Structure):
   _fields_ = [("real", c_double), ("imag", c_double)]
   def _get(self):
       ....
   def _set(self, value):
       ....
   value = property(_get, _set)

but I'm afraid this is not really portable to other platforms.

Thomas



From DustanGroups at gmail.com  Tue Aug 21 12:44:23 2007
From: DustanGroups at gmail.com (Dustan)
Date: Tue, 21 Aug 2007 16:44:23 -0000
Subject: How to optimise this code?
In-Reply-To: <mailman.72.1187713835.32294.python-list@python.org>
References: <1187711974.29800.1206519007@webmail.messagingengine.com>
	<mailman.72.1187713835.32294.python-list@python.org>
Message-ID: <1187714663.211663.90430@o80g2000hse.googlegroups.com>

On Aug 21, 11:20 am, "J. Cliff Dyer" <j... at sdf.lonestar.org> wrote:
> I suspect lambda might be your friend here too for making the code less
> verbose, though I never really got the hang of lambdas, even though my
> first programming experience was a scheme class way back when....  Ah well.

That's because it's not the same thing.



From aleax at mac.com  Fri Aug 31 11:56:21 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 31 Aug 2007 08:56:21 -0700
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<1i3ob5k.dm3jmoqx1z68N%aleax@mac.com>
	<1188530557.550119.27260@q3g2000prf.googlegroups.com>
Message-ID: <1i3pcju.j2fvej1056nqpN%aleax@mac.com>

mensanator at aol.com <mensanator at aol.com> wrote:
   ...
> Why wouldn't "the one obvious way" be:
> 
>  def inAnotB(A, B):
>      inA  = set(os.listdir(A))
>      inBs = set(os.listdir(B))
>      return inA.difference(inBs)

If you want a set as the result, that's one possibility (although
possibly a bit wasteful as you're building one more set than necessary);
I read the original request as implying a sorted list result is wanted,
just like os.listdir returns (possibly sorted in case-independent order
depending on the underlying filesystem).  There's no real added value in
destroying inA's ordering by making it a set, when the list
comprehension just "naturally keeps" its ordering.


Alex


From fabioztessitore at libero.it  Wed Aug 29 18:09:19 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 29 Aug 2007 22:09:19 GMT
Subject: cgi
References: <fb4a57$ojf$1@ss408.t-com.hr>
	<46d5c01b$0$36438$4fafbaef@reader5.news.tin.it>
	<fb4gpa$bb0$1@ss408.t-com.hr>
	<46d5daa7$0$36441$4fafbaef@reader5.news.tin.it>
	<fb4n33$pvd$1@ss408.t-com.hr> <fb4neq$r03$1@ss408.t-com.hr>
Message-ID: <46d5ee8f$0$36445$4fafbaef@reader5.news.tin.it>

Il Wed, 29 Aug 2007 23:11:53 +0200, Gigs_ ha scritto:

> Gigs_ wrote:
>> Fabio Z Tessitore wrote:
>>> Are you sure your script is in the right dir?
>>>
>>> On my home computer, php script will work in /var/www but my python
>>> script need an other dir to work properly (i don't remember which now
>>> ;-))
>>>
>>> bye
>>>
>> i think that it is in right dir because other script in same dir work.
>> dir is: cgi-bin
> 
> 
> sorry...................
> 
> 
> 
> for waisting your time,
> somehow in html page in form i forgot to put right script addr
> 
> 
> 
> thx anyway
> 
> 
> work now

no prob, bye


From http  Mon Aug  6 06:11:13 2007
From: http (Paul Rubin)
Date: 06 Aug 2007 03:11:13 -0700
Subject: Misleading wikipedia article on Python 3?
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
Message-ID: <7xzm15q8fy.fsf@ruckus.brouhaha.com>

Carsten Haese <carsten at uniqsys.com> writes:
> For instance, if you never use print statements in your code, you won't
> notice that print is becoming a function. If you do, you'll have to make
> appropriate accommodations.

Why on earth did they make this change?  It just seems gratuitous.  Is
the assert statement also being changed?  Are they going to update all
the docs that say that the yield statement works like the print statement?


From lisajones22 at gmail.com  Mon Aug 13 11:54:11 2007
From: lisajones22 at gmail.com (Lisa Jones)
Date: Mon, 13 Aug 2007 08:54:11 -0700
Subject: =?utf-8?B?4pa6RU5KT1kgZnJlZSBzYXRlbGxpdGUgdHYgb24geW91ciBwY+KXhA==?=
Message-ID: <1187020451.624272.28410@e9g2000prf.googlegroups.com>

The New Way To Enjoy Satellite TV on your PC!

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From mcknight0219 at gmail.com  Tue Aug 28 10:10:47 2007
From: mcknight0219 at gmail.com (Jimmy)
Date: Tue, 28 Aug 2007 07:10:47 -0700
Subject: wxpython:how to minimize to taskbar
Message-ID: <1188310247.587456.103440@i13g2000prf.googlegroups.com>

I'm kinda newbie to python and wxPython. Now I'm confronting a thorny
problem: how can I make  my program minimize to the taskbar
represented as an ico, and when there is some message from network
coming, it will pop out?



From ptmcg at austin.rr.com  Mon Aug 13 13:40:57 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 13 Aug 2007 10:40:57 -0700
Subject: Python in Chinese
Message-ID: <1187026857.622808.80470@19g2000hsx.googlegroups.com>

Back in May, there was quite an extensive discussion of whether or not
Python should support Unicode identifiers (with the final result being
that this would be supported in Python 3).  In my periodic googling
for pyparsing users, I stumbled upon Zhpy, a preprocessor that renders
on the fly Chinese Python keywords and indentifiers written using
traditional Chinese characters into ASCII counterparts, and then
executes the resulting script.  I was very intrigued at the idea, and
I thought back to Martin v. L?wis's PEP.  The Zhpy approach will work
with current versions of Python (going back to 2.3, since pyparsing
requires that version).

You can view examples at the pyparsing "Who's Using Pyparsing" wiki
page - http://pyparsing.wikispaces.com/WhosUsingPyparsing#Zhpy.

Given the breadth of response to Martin v. L?wis's post, I'm curious
as to what the reaction might be to something like Zhpy.

-- Paul



From arnodel at googlemail.com  Thu Aug 30 15:13:46 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 30 Aug 2007 19:13:46 -0000
Subject: subclassing Python types
In-Reply-To: <1188500442.434722.157350@q5g2000prf.googlegroups.com>
References: <1188500442.434722.157350@q5g2000prf.googlegroups.com>
Message-ID: <1188501226.443493.94720@i13g2000prf.googlegroups.com>

On Aug 30, 8:00 pm, zzbba... at aol.com wrote:
> I have read that you can derive from the base classes such as str,
> list, dict.
>
> I guess this would look like:
>
> def MyString(str):
> def MyList(list):
> def MyDict(dict):

You mean

class MyString(str):
...

> How do you access the data that is contained in the super class?

The same way that you access plain strings, lists or dicts: use the
methods of the super class.

HTH

PS: it is not so often a good idea to derive a class from these types.

--
Arnaud




From Shawn at Milochik.com  Tue Aug 14 12:59:44 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Tue, 14 Aug 2007 12:59:44 -0400
Subject: Simple python iteration question
In-Reply-To: <20070814163430.GJ22017@lass.lfod.us>
References: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
	<20070814163430.GJ22017@lass.lfod.us>
Message-ID: <2dc0c81b0708140959m6f68fa54u1303f23e02ae40a@mail.gmail.com>

<snip>
> Use the enumerate() builtin.
>
>     >>> l = ['a', 'b', 'c']
>     >>> for i, v in enumerate(l):
>     ...     print i, v
>     ...
>     0 a
>     1 b
>     2 c
>
> --


Just for my own sanity: Isn't this the third response advocating the
use of enumerate()? Did the other responses not get through, or was
this a time-delay thing?

Thanks,
Shawn


From __peter__ at web.de  Wed Aug  8 02:52:20 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 08 Aug 2007 08:52:20 +0200
Subject: Seek the one billionth line in a file containing 3 billion lines.
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
Message-ID: <f9bp75$vbq$03$1@news.t-online.com>

Sullivan WxPyQtKinter wrote:

> I have a huge log file which contains 3,453,299,000 lines with
> different lengths. It is not possible to calculate the absolute
> position of the beginning of the one billionth line. Are there
> efficient way to seek to the beginning of that line in python?
> 
> This program:
> for i in range(1000000000):
>       f.readline()
> is absolutely every slow....
> 
> Thank you so much for help.

That will be slow regardless of language. However

n = 10**9 - 1
assert n < sys.maxint
f = open(filename)
wanted_line = itertools.islice(f, n, None).next()

should do slightly better than your implementation.

Peter




From zyzhu2000 at gmail.com  Thu Aug  2 10:55:28 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Thu, 02 Aug 2007 14:55:28 -0000
Subject: Awkward format string
In-Reply-To: <46b196aa$0$18885$426a74cc@news.free.fr>
References: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
	<46b196aa$0$18885$426a74cc@news.free.fr>
Message-ID: <1186066528.232750.98700@g12g2000prg.googlegroups.com>

On Aug 2, 3:32 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> beginner a ?crit :
>
> > Hi,
>
> > In order to print out the contents of a list, sometimes I have to use
> > very awkward constructions. For example, I have to convert the
> > datetime.datetime type to string first, construct a new list,
>
> s/list/tuple/
>
> > and then
> > send it to print. The following is an example.
>
> >    x=(e[0].strftime("%Y-%m-%d"), e[1].strftime("%Y-%m-%d"))+e[2:]
> >    print  >>f, "%s\t%s\t%d\t%f\t%f\t%f\t%d" % x
>
> > e is a tuple. x is my new tuple.
>
> > Does anyone know better ways of handling this?
>
>  >>> from datetime import datetime
>  >>> dt = datetime(2007,8,2)
>  >>> dt
> datetime.datetime(2007, 8, 2, 0, 0)
>  >>> str(dt)
> '2007-08-02 00:00:00'
>  >>> "%s" % dt
> '2007-08-02 00:00:00'
>  >>> dt.date()
> datetime.date(2007, 8, 2)
>  >>> str(dt.date())
> '2007-08-02'
>
> Do you really need datetime objects ? If not, using date objects instead
> would JustWork(tm) - at least until someone ask you to use another date
> format !-)
>
> Else, and since you seem to have a taste for functional programming:
>
> from datetime import datetime
> from functools import partial
>
> def iformat(e):
>      fake = lambda obj, dummy: obj
>      for item in e:
>          yield getattr(item, 'strftime', partial(fake, item))('%Y-%m-%d')
>
> e = (datetime(2007,8,1),datetime(2007,8,2) ,42, 0.1, 0.2, 0.3, 1138)
> print tuple(iformat(e))
> print "%s\t%s\t%d\t%f\t%f\t%f\t%d" % tuple(iformat(e))

Thanks.

The 'functional' taste is still under development. It hasn't reached
production quality yet. :-)



From grante at visi.com  Mon Aug 20 14:18:14 2007
From: grante at visi.com (Grant Edwards)
Date: Mon, 20 Aug 2007 18:18:14 -0000
Subject: Hot subject: a good python editor and/or IDE?
References: <mailman.2162.1187525764.22759.python-list@python.org>
	<S1kyi.116948$g86.98676@newsfe14.lga>
Message-ID: <13cjmn6htpph7ef@corp.supernews.com>

On 2007-08-20, Dave Cook <davecook at nowhere.net> wrote:
> On 2007-08-19, S?bastien <seb.buchoux at gmail.com> wrote:
>
>> I am currently using Eclipse+PyDev when developping Python projects but 
>> I lack a fast, simple editor for tiny bit of scripts. So here is my 
>> question: what is, for you, the current best ( but still kind of light! 
>> ) Python editor/IDE ? A tiny precision, I am on Ubuntu so I am looking 
>> for a linux compatible editor.
>
> JED has a nice python mode for fast, simple editing.  

I second the Jed nomination...

-- 
Grant Edwards                   grante             Yow! I want EARS!  I want
                                  at               two ROUND BLACK EARS
                               visi.com            to make me feel warm
                                                   'n secure!!


From cjw at sympatico.ca  Fri Aug 17 17:32:09 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 17 Aug 2007 17:32:09 -0400
Subject: sub-classing the types in the builtin module datetime
In-Reply-To: <1187294329.082872.230800@l22g2000prc.googlegroups.com>
References: <mailman.2043.1187225689.22759.python-list@python.org>
	<1187294329.082872.230800@l22g2000prc.googlegroups.com>
Message-ID: <46C613D9.5070009@sympatico.ca>

attn.steven.kuo at gmail.com wrote:
[My question snipped]
> 
> 
> 
> This problem arises when you change the function signature of __new__.
> I'm a little unclear as to why but it seems for the classmethods
> (thosed marked with the METH_CLASS flag in the C source code), you
> need to arrange to bypass the normal method resolution (I used a
> metaclass
> to do this):
> 
> 
> 
> import datetime
> 
> class Date(datetime.datetime):
>     pass
> 
> class FixClassMethods(type):
>     def __init__(cls, classname, bases, classdict):
>         # add strptime if using Python 2.5
>         flagged_as_meth_class = ('today', 'now', 'fromtimestamp',
>         'fromordinal', 'now', 'utcnow', 'utcfromtimestamp', 'combine')
>         for meth in flagged_as_meth_class:
>             setattr(cls, meth, getattr(datetime.datetime, meth))
> 
> class DateChangesNewSignature(datetime.datetime):
>     @staticmethod
>     def str2ymd(strval):
>         yyyy, mm, dd = (int(substr) for substr in (strval[:4],
>             strval[4:6], strval[6:]))
>         return yyyy, mm, dd
> 
>     def __new__(cls, strval):
>         yyyy, mm, dd = DateChangesNewSignature.str2ymd(strval)
>         return super(DateChangesNewSignature,cls).__new__(cls, yyyy,
> mm,
>                 dd)
>     def __init__(self, strval):
>         yyyy, mm, dd = DateChangesNewSignature.str2ymd(strval)
>         super(DateChangesNewSignature, self).__init__(yyyy, mm,
>                 dd)
> 
> class DLast(DateChangesNewSignature):
>     __metaclass__ = FixClassMethods
> 
> f = Date(2007,07,07)
> print f
> print f.today()
> 
> f2 = DateChangesNewSignature("20070707")
> print f2
> try:
>     print f2.today()
> except TypeError, e:
>     print str(e)
>     print "Uh?"
> 
> 
> f3 = DLast("20070707")
> print f3
> print f3.today()
> 
> 
> I get:
> 
> 2007-07-07 00:00:00
> 2007-08-16 12:57:41.480679
> 2007-07-07 00:00:00
> __new__() takes exactly 2 arguments (9 given)
> Uh?
> 2007-07-07 00:00:00
> 2007-08-16 12:57:41.483104
> 
> 
> --
> Hope this helps,
> Steven
> 

Steven,

Thanks, you provide an elegant solution to the datetime problem I raised.

I like the illustration of metaclass usage you have have given,
it's something I have had trouble grasping.

You handle the examples I gave.  However, on reflection,I feel that
('today', 'now', 'fromtimestamp', 'fromordinal', 'now', 'utcnow', 
'utcfromtimestamp', 'combine') are completely inappropriate as
methods and that they should have been set up as functions of
datetime and not as methods of datetime.datetime.
The difficulty I have in adopting your approach is that it would
be difficult for the reader to comprehend the code.

My feeling is that it should be possible to change a signature using
simple Python approaches.

I'll puzzle some more.

Thanks again.

Colin W.


From arkanes at gmail.com  Fri Aug 17 10:13:51 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 17 Aug 2007 09:13:51 -0500
Subject: (sort of) deterministic timing in Python
In-Reply-To: <017501c7e0a6$cff9dc40$03000080@hendrik>
References: <1i2si8h.1qc8f77i68gyeN%johnmfisher@comcast.net>
	<7xlkcbgto6.fsf@ruckus.brouhaha.com>
	<017501c7e0a6$cff9dc40$03000080@hendrik>
Message-ID: <4866bea60708170713x402112d6o23333db400c5bc6c@mail.gmail.com>

On 8/17/07, Hendrik van Rooyen <mail at microcorp.co.za> wrote:
>
>  "Paul Rubin" <http://p..id> wrote:
>
>
> >johnmfisher at comcast.net (John Fisher) writes:
> >> mark start time
> >> start event
> >>         event finishes
> >> count time until next interval
> >> start second event?
> >>
> >> rather than this:
> >>
> >> start event
> >>         event finishes
> >> sleep for interval
> >> start second event
> >> ...
> >> So how do I accomplish this in Python with a minimum of labour?
> >
> >Normally I'd use something like:
> >
> >   from time import time
> >
> >   t0 = time()
> >   start event ... event finishes
> >   t1 = time()
> >   elapsed = t1 - t0
> >   sleep(interval - elapsed)
> >   start second event ...
> >
> >Am I missing something?
>
> Not much - only beware of cases when elapsed is greater than
> interval - not sure what time.sleep(negative_number) does.
>

On Windows 2k3, Python 2.5 it sleeps forever (or almost forever? Maybe
a signed/unsigned thing) so yeah, be careful of it.


From paul at carlislegroup.com  Mon Aug  6 09:20:30 2007
From: paul at carlislegroup.com (Paul Mansour)
Date: Mon, 06 Aug 2007 06:20:30 -0700
Subject: (Re)announcing APL 2007
In-Reply-To: <5hnkb3F3hus4jU1@mid.individual.net>
References: <5hnkb3F3hus4jU1@mid.individual.net>
Message-ID: <1186406430.744134.298400@x35g2000prf.googlegroups.com>

On Aug 5, 11:54 pm, Mike Kent <mk... at acm.org> wrote:
> APL 2007 conference on Array Programming
>
>      co-located with OOPSLA 2007
>
> Sponsor:              ACM SIGAPL
>
> Where:                Montreal
>
> When:                 October 21 (tutorials)
>                        October 22/23  (main conference program)


APL2007 Roll Call: Is anyone going to this?

I'm thinking about going, but I don't want to the only one to show up,
as in San Diego.




From wildemar at freakmail.de  Thu Aug 23 20:18:57 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Fri, 24 Aug 2007 02:18:57 +0200
Subject: introspection and functions
In-Reply-To: <46CDA178.4060700@bigfoot.com>
References: <1187819949.515982.15450@r23g2000prd.googlegroups.com>	<B33zi.4126$Oo.317@newssvr17.news.prodigy.net>	<20070823104810.6054520f.ayaz@dev.null>
	<46CDA178.4060700@bigfoot.com>
Message-ID: <46CE23F1.9010202@freakmail.de>

Ricardo Ar?oz wrote:
> Ayaz Ahmed Khan wrote:
>   
>> "James Stroud" typed:
>>     
>>> py> def doit(a, b, c, x=14):
>>> ...   pass
>>> ...
>>> py> doit.func_code.co_argcount
>>> 4
>>> py> doit.func_code.co_varnames
>>> ('a', 'b', 'c', 'x')
>>> py> doit.func_defaults
>>> (14,)
>>>       
>> Neat.
>>     
> How do you know the 14 corresponds to x ?
>   
Well, there is one optional argument (len(doit.func_defaults)==1) and 
those *must* come after mendatory arguments. More generally: If a 
function has n optional args, they're the n last ones. There is never 
any ambiguity.

/W


From dtgeadamo at yahoo.com  Sun Aug 12 08:44:58 2007
From: dtgeadamo at yahoo.com (Viewer T.)
Date: Sun, 12 Aug 2007 05:44:58 -0700
Subject: Database intensive application
In-Reply-To: <1186895306.237395.189530@z24g2000prh.googlegroups.com>
References: <1186895306.237395.189530@z24g2000prh.googlegroups.com>
Message-ID: <1186922698.918184.31210@x40g2000prg.googlegroups.com>

On Aug 11, 10:08 pm, Rohit <rpk.gene... at gmail.com> wrote:
> I am a novice. I want to know whether Python can be used to develop
> client/server database and web applications like .NET. Which is the
> best book/source to learn Python?

O'reilly's Learning Python by David Ascher and Mike Lutz has a
reputation for being the best book for learning Python and Yes, Python
has awesome database support and can satisfy almost all database needs.



From bert.heymans at gmail.com  Fri Aug 24 09:09:28 2007
From: bert.heymans at gmail.com (Bert Heymans)
Date: Fri, 24 Aug 2007 06:09:28 -0700
Subject: Regular expression use
In-Reply-To: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
Message-ID: <1187960968.808605.20050@i38g2000prf.googlegroups.com>

Nick,

In "Mastering Regular Expressions" by Jeffrey E. F. Friedl your
question is answered in the first 6 chapters. Seriously, that's what
it takes. It's a really good book.

Cheers

Bert

On Aug 24, 12:58 pm, n... at cus.cam.ac.uk (Nick Maclaren) wrote:
> For reasons that I won't explain, as they are too complicated
> and not terribly relevant, I am interested in discovering what
> people actually use regular expressions for.  Not the subject
> domain, but the construction of the regular expressions.
>
> I know about computer scientists and parsing, and I know about
> the use of relatively simple ones for things like extracting
> HTML links from Web pages.  But I don't have much feel for the
> (probably rare but difficult) uses of more complex ones for
> other purposes.  I have heard of several such uses, but don't
> have an overall idea of what is going on.
>
> Any pointers appreciated, to more-or-less anything.
>
> Regards,
> Nick Maclaren.




From jcd at sdf.lonestar.org  Tue Aug 21 12:20:35 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Tue, 21 Aug 2007 12:20:35 -0400
Subject: How to optimise this code?
In-Reply-To: <1187711974.29800.1206519007@webmail.messagingengine.com>
References: <1187711974.29800.1206519007@webmail.messagingengine.com>
Message-ID: <46CB10D3.8040604@sdf.lonestar.org>

David N Montgomery wrote:
> class testCase:
>     def __init__(self, tc):
>         if tc == 1:self.testCase1()
>         if tc == 2:self.testCase2()
>         if tc == 3:self.testCase3()
>         if tc == 4:self.testCase4()
>         if tc == 5:self.testCase5()
>         if tc == 6:self.testCase6()
>
>     def testCase1(self):
>         print "tc1"
>
>     def testCase2(self):
>         print "tc2"
>
>     def testCase3(self):
>         print "tc3"
>
>     def testCase4(self):
>         print "tc4"
>
>     def testCase5(self):
>         print "tc5"
>
>     def testCase6(self):
>         print "tc6"
>
>
>     def testCaseX(self):
>         print "tcX"
>
> totalNumberOfTestCases = 6
> x = 0
> while x <= totalNumberOfTestCases:
>     x += 1
>     testCase(x)
>
>
> This template code is working, but I envisage having 100+ test cases and
> am concerned about my useage of if statements. I would be grateful for
> any pointers as to how I can run all tests cases, regardless of how
> many, in a more efficient manner.
>
> Thank you in advance.
>   

try binding each function to an element of a list, and then processing 
across the list.  This might look like:

def testCase1:
    return "tc1"
def testCase2:
    return "tc2"

testCaseList = []
testCaseList.append(testCase1)
testCaseList.append(testCase2)

for testCase in testCaseList:
    testCase()

Also, as python allows direct iteration over a list, you'll find that 
you don't need to create loops on an incrementor variable.  Just loop on 
the list itself. 

I suspect lambda might be your friend here too for making the code less 
verbose, though I never really got the hang of lambdas, even though my 
first programming experience was a scheme class way back when....  Ah well.

Hope this helps.

Cheers,
Cliff




From googlegroupie at coloraura.com  Sun Aug 19 16:12:56 2007
From: googlegroupie at coloraura.com (Daniel Pitts)
Date: Sun, 19 Aug 2007 20:12:56 -0000
Subject: A/C Systems!
In-Reply-To: <1187545327.963222.223220@w3g2000hsg.googlegroups.com>
References: <1187545194.099278.217330@w3g2000hsg.googlegroups.com>
	<1187545327.963222.223220@w3g2000hsg.googlegroups.com>
Message-ID: <1187554376.345506.82660@i38g2000prf.googlegroups.com>

On Aug 19, 10:42 am, carairconditionersm... at gmail.com wrote:
> On Aug 19, 7:39 pm, Cartun... at gmail.com wrote:
>
> > Everything you need to know about car air conditioners...
>
> >http://car-air-conditioning.spamspot.spam/
>
> Great website man, I found everything I need

Perhaps you did, after all, you advertise it all over. However, I fail
to see the relevance to a Java newsgroup.  Don't you know that
targeted advertising has far better return?



From lycka at carmen.se  Thu Aug  9 10:49:09 2007
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 09 Aug 2007 16:49:09 +0200
Subject: Something in the function tutorial confused me.
In-Reply-To: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
Message-ID: <f9f9h5$fgg$1@wake.carmen.se>

Lee Fleming wrote:
> Hello,
> I have a simple question. Say you have the following function:
> 
> def f(x, y = []):
...

> But this, the code that "fixes" the list accumulation confounds me:
> def  f(x, y=None):
>     if y is None: y = []
...

> In other words, what's going on here? How is it that y accumulates
> argument values between function calls in the first function, but
> doesn't in the second one? 

I think the important thing to understand here is the
distinction between names/variables and objects/values
in Python.

While you could interpret C code like this...

void f() {
     ...
     int i = 5;
     ...
     int j = i;
     ...
}

... as "create a place in the namespace of the f function
where you can fit an integer value, and put the value 5
there. Later, create another place in the namespace of f
which is also big enough for an integer. Copy the contents
of the location named 'i', to the location named 'j'."

You would instead interpret this similar Python code...

def f():
     ...
     i = 5
     ...
     j = i
     ...

... as "create an integer object with the value 5. Then
define a name/tag/variable in the namespace of function
f which refers to the integer object with the value 5.
Later, make a new name/tag/variable in the namespace of
f which refers to the same object (happens to be an
integer with the value 5) as i refers to."

The semantics is very different.

If you understand this, Python will seem much less magical,
and you will never ask meaningless questions as whether
Python uses call by reference or call by value.

It's all a matter of understanding that all the juicy bits
in the Python data model is in the actual values or objects.
That's the stuff with type safety, a location in memory,
qualities such as mutability etc. A "variable" is basically
just a reference to an arbitrary object in a particular
namespace. Assignments semantics is not about copying
data as in C, and it's nothing arbitrarily defined in
classes as in C++. It's all about deciding which object
a name refers to.



From irmen.NOSPAM at xs4all.nl  Tue Aug  7 13:37:04 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 07 Aug 2007 19:37:04 +0200
Subject: distutils
In-Reply-To: <1186489676.042901.236140@w3g2000hsg.googlegroups.com>
References: <1186489676.042901.236140@w3g2000hsg.googlegroups.com>
Message-ID: <46b8adc7$0$240$e4fe514c@news.xs4all.nl>

vedrandekovic at v-programs.com wrote:
> Hello again,
> 
> Is there any patch for python "distutils", for this
> 
>>>> from distutils import log,dir_util
> ImportError: cannot import name log
> 
> 
> Regards,
> Vedran
> 

Are you sure you haven't written a module yourself called distutils.py ?
(that one will hide the standard distutils module)

--irmen


From michele.simionato at gmail.com  Fri Aug 10 01:26:11 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Fri, 10 Aug 2007 05:26:11 -0000
Subject: Deleting objects on the fly
In-Reply-To: <1186705500.227658.163170@q3g2000prf.googlegroups.com>
References: <1186705500.227658.163170@q3g2000prf.googlegroups.com>
Message-ID: <1186723571.250731.65040@q3g2000prf.googlegroups.com>

On Aug 10, 2:25 am, Godzilla <godzillais... at gmail.com> wrote:
> Hello,
>
> I wish to know whether I should delete objects created on the fly via
> the "del obj" statement. I noticed the RAM usage increased whenever
> the application is being run for a long time. I am creating lots of
> objects (messages) on the fly for communication between threads.
>
> Rather than having python's gc to do the work, does it make a
> difference if I force a deletion?
>
> Thanks.

Probably not, 'del x' just decrements the reference count, but
it is the gc who does the real job. See http://docs.python.org/ref/customization.html#l2h-175

Do you have reference cycles in your application? You should
tell us something more.

       Michele Simionato



From zyzhu2000 at gmail.com  Thu Aug  2 21:31:58 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Thu, 02 Aug 2007 18:31:58 -0700
Subject: Efficient Rank Ordering of Nested Lists
In-Reply-To: <1186104049.022836.253470@e9g2000prf.googlegroups.com>
References: <1186104049.022836.253470@e9g2000prf.googlegroups.com>
Message-ID: <1186104718.857998.14040@z24g2000prh.googlegroups.com>

On Aug 2, 8:20 pm, "pablo.mitch... at gmail.com"
<pablo.mitch... at gmail.com> wrote:
> A naive approach to rank ordering (handling ties as well) of nested
> lists may be accomplished via:
>
>    def rankLists(nestedList):
>       def rankList(singleList):
>           sortedList = list(singleList)
>           sortedList.sort()
>           return map(sortedList.index, singleList)
>       return map(rankList, nestedList)
>
>    >>> unranked = [ [ 1, 2, 3, 4, 5 ], [ 3, 1, 5, 2, 4 ], [ -1.1, 2.2,
> 0, -1.1, 13 ] ]
>    >>> print rankLists(unranked)
>
>    [[0, 1, 2, 3, 4], [2, 0, 4, 1, 3], [0, 3, 2, 0, 4]]
>
> This works nicely when the dimensions of the nested list are small.
> It is slow when they are big.  Can someone suggest a clever way to
> speed it up?

Indexing the sorted list with a dictionary will speed it up a little.



From SSchukat at dspace.de  Fri Aug 31 12:05:37 2007
From: SSchukat at dspace.de (Stefan Schukat)
Date: Fri, 31 Aug 2007 17:05:37 +0100
Subject: win32com problem: more than one instance
In-Reply-To: <46D80B44.3050708@timgolden.me.uk>
Message-ID: <1B3F2E002D9AD04BBC1A27B370F29EB9023807@exchange2003.dspace.de>

 
Hello Thomas, 

excel registers its COM objects with REGCLS_SINGLEUSE that means one COM
object is created
per process. In Solidworks it seems that that they register with
REGCLS_MULTIPLEUSE, which means
on process can serve more than one COM object. Hence you have no chance
to get multiple instances
running in any COM client. 

	Stefan


> -----Original Message-----
> From: python-list-bounces+sschukat=dspace.de at python.org 
> [mailto:python-list-bounces+sschukat=dspace.de at python.org] On 
> Behalf Of Tim Golden
> Sent: Friday, August 31, 2007 1:36 PM
> To: Thomas Rademacher
> Cc: python-list at python.org
> Subject: Re: win32com problem: more than one instance
> 
> Thomas Rademacher wrote:
> > Hello,
> > 
> > I start my script convert.py simultaneously in any 
> dos-shells several 
> > times. But I get every time the same solidworks instance.
> > I see in the proccess (task) manager only one 
> solidworks.exe Therefore 
> > I get for all simultaneous conversions the same output file.
> 
> I *think* -- and I'm really hoping someone more knowledgeable 
> can chip in here -- that it's down to the particular COM 
> object implementation. ie Excel may choose to offer you 
> separate instances (or whatever they're called) while 
> SolidWorks may not.
> 
> TJG
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


From aleax at mac.com  Sun Aug 26 01:14:36 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 25 Aug 2007 22:14:36 -0700
Subject: Need a better understanding on how MRO works?
References: <mailman.295.1188079346.32294.python-list@python.org>
	<1i3evke.1rwf8pn10k1h30N%aleax@mac.com>
	<mailman.0.1188096859.28954.python-list@python.org>
Message-ID: <1i3f78x.1pxexgx6emjfhN%aleax@mac.com>

Steven W. Orr <steveo at syslang.net> wrote:
   ...
> Thanks Alex. I am humbled, though I was before I started.
> I really don't have a lot of understanding of what you're saying so I'll
> probably have to study this for about a year or so.
> 
> * (I need to look up what dictproxy is.) I don't have any idea what the
> ramifications are of your use of the word DISTINCT. Are you somehow 
> suggesting that new.classobj does a deep copy of the globals copy that's
> passed to it?

No, most definitely NOT deep!!!, but type.__new__ does "a little" of
what you've said (a shallow copy, which is not quite "a copy" because it
embeds [some of] the entries in slots).  new.classobj determines the
metaclass (from the bases, or a __metaclass__ entry in the dictionary)
and calls it to generate the new class.  For modern style classes, the
class is type; for old-style legacy classes, it's types.ClassType, and
they're not exactly identical in behavior (of course not, or there would
no point in having both:-).

> 
> * Also, I'd like to understand what the difference is between 
>     nclass = new.classobj(name,(D1,),globals())
> vs. 
>     def classfactory():
>       class somename(object):
>           def somestuff():
>               pass
>         return somename
>     G1 = classfactory()
>     globals()[name] = G1
> 
> Does new.classobj do anything special?

No, new.classobj does essentially the same thing that Python does after
evaluating a class statement to prepare the class's name, bases and
dictionary: finds the metaclass and calls it with these arguments.

A key difference of course is that a class statement prepares the class
dictionary as a new, ordinary, distinct dictionary, while new.classobj
accepts whatever dictionary you give it (so you can, though shouldn't,
do strange things such as pass globals()...:-).


Alex


From exhuma at gmail.com  Thu Aug 16 03:19:18 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Thu, 16 Aug 2007 00:19:18 -0700
Subject: twisted.web's xmlrpc with digest authencitation
Message-ID: <1187248758.702385.204390@d55g2000hsg.googlegroups.com>

I recently found a link[1] which demonstrates how to secure a xml-rpc
service with basic HTTP-auth. But this get's send in clear-text over
the net. There's also the HTTP-Digest auth mechanism which is
apparently supported as well by twisted[2].

How do I secure an xml-rpc service using digest-auth then?
If this works, all my troubles are suddenly gon and I am sold for
twisted ;)

[1]: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/526625
[2]: http://twistedmatrix.com/trac/ticket/1475



From carsten at uniqsys.com  Fri Aug 24 11:24:30 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 24 Aug 2007 11:24:30 -0400
Subject: creating a tar file with python
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE2EE@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
	<faktv8$8fs$1@sea.gmane.org>
	<93066C069973ED448DC2BCEA9C44A7383BE2ED@efmailx>
	<46CE4D3D.7020106@holdenweb.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2EE@efmailx>
Message-ID: <1187969070.3385.20.camel@dot.uniqsys.com>

On Thu, 2007-08-23 at 23:27 -0400, Brian McCann wrote:
>  
> 
> Steve,
>  
> I ran the code as you suggested, didn't work, tried variations of it
> didn't work,
> If you don't know the answer don't pretend you do!
> 
> Apology not accepted, please don't wake up!
> 
> Future correspondence on any python questions from you go to trash.

You clearly have no idea who you're talking to. I suggest you Google for
'"Steve Holden" Python' to get a clue. Good luck finding any more help
here.

-Carsten





From duncan.booth at invalid.invalid  Tue Aug  7 09:13:49 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 Aug 2007 13:13:49 GMT
Subject: ensuring GNU readline isn't used
References: <mailman.1711.1186491401.22759.python-list@python.org>
Message-ID: <Xns99858FA1445D0duncanbooth@127.0.0.1>

Josh Paetzel <josh at tcbug.org> wrote:

> Is there a way to ensure that GNU readline isn't used (even though
> support may have been compiled in?).  I'm experiencing a licensing
> problem, I'd like to use the "cmd" module, for example, but my code is
> proprietary and hence, if cmd uses readline, I can't use cmd.

I think you have misread the GPL: just because your non-GPL code *can* be 
used with something covered by the GPL doesn't mean your code is infected 
by the GPL. Your code doesn't require a GPL module to run (you can use a 
version of cmd compiled without readline), and you aren't attempting to 
distribute it with a GPL module, so you don't need to care how the end user 
chooses to run it.



From bcc at nospam.net  Wed Aug  8 17:44:41 2007
From: bcc at nospam.net (Bryan)
Date: Wed, 08 Aug 2007 14:44:41 -0700
Subject: How to reset sys.exec_prefix?
Message-ID: <fPqui.2806$IE5.17@newssvr17.news.prodigy.net>

Somehow on my linux box I scrood things up and I lost my python path info.

If I check sys.exec_prefix or sys.prefix it shows '/usr/local/', where 
it should show '/usr/'.

Is there a config file somewhere that I can change to fix this, or do I 
need to do a rebuild/reinstall?  Hope not.

Thanks,
B


From steve at holdenweb.com  Tue Aug 21 12:54:56 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Aug 2007 12:54:56 -0400
Subject: str().join() isn't working
In-Reply-To: <1187634895.387910.179500@m37g2000prh.googlegroups.com>
References: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com>	<mailman.4.1187633821.32294.python-list@python.org>
	<1187634895.387910.179500@m37g2000prh.googlegroups.com>
Message-ID: <faf5cn$pgb$1@sea.gmane.org>

kyosohma at gmail.com wrote:
> On Aug 20, 1:16 pm, "Robert Dailey" <rcdai... at gmail.com> wrote:
[...]
> When you use join, you join the items in the list with each other to
> form one long string. In your statement, your script tries to
> concatenate 2 lists to each other before it does the join, which is
> impossible in Python. The "+" operator is only for addition and for
> two or more strings.
> 
Bzzzt!

 >>> ["you", "can't", "add", "lists?"] + ["-", "nonsense!"]
['you', "can't", 'add', 'lists?', '-', 'nonsense!']
 >>>

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
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Many services currently offer free registration
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From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Aug 19 08:45:49 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 19 Aug 2007 14:45:49 +0200
Subject: How to make a module function visible only inside the module?
References: <1187484334.091530.90420@m37g2000prh.googlegroups.com>
	<1i32pg7.b0y3h92vjygwN%raims@dot.com>
	<1187488017.198905.242610@j4g2000prf.googlegroups.com>
Message-ID: <5iqsbtF3qanv6U3@mid.individual.net>

beginner wrote:

> Thanks a lot. I was using two underscores, __module_method() as my
> static method convention, and then I had some problems calling
> them from inside class methods.

*Please* do yourself and other people that sometime may have to read
your code a favor and write code at least loosely oriented to 
PEP 8.

BTW, Python has no "static methods" at module level. And I suppose
what you call "class methods" actually aren't.

Regards,


Bj?rn

-- 
BOFH excuse #183:

filesystem not big enough for Jumbo Kernel Patch



From google at tyeon.com  Wed Aug 29 21:21:11 2007
From: google at tyeon.com (google at tyeon.com)
Date: Wed, 29 Aug 2007 18:21:11 -0700
Subject: How to use os.putenv() ?
Message-ID: <1188436871.549201.315170@g4g2000hsf.googlegroups.com>

>>>
>>> import os
>>>
>>> os.environ['PATH']
'C:\\WINNT\\system32;C:\\WINNT;C:\\WINNT\\System32\\Wbem;%C:\\WINNT%\
\system32;%C:\\WINNT%;%C:\\WINNT%\\System32\\Wbem'
>>>
>>> os.putenv('PATH', 'C:\\WINNT\\system32')
>>>
>>> os.environ['PATH']
'C:\\WINNT\\system32;C:\\WINNT;C:\\WINNT\\System32\\Wbem;%C:\\WINNT%\
\system32;%C:\\WINNT%;%C:\\WINNT%\\System32\\Wbem'
>>>

What am I doing wrong?  How do I change the value of an environment
variable?



From deets at nospam.web.de  Mon Aug  6 11:44:46 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 06 Aug 2007 17:44:46 +0200
Subject: boolean operations on sets
References: <1186409631.147290.323400@22g2000hsm.googlegroups.com>
Message-ID: <5hotveF3l5gmkU1@mid.uni-berlin.de>

Flavio wrote:

> Hi, I have been playing with set operations lately and came across a
> kind of surprising result given that it is not mentioned in the
> standard Python tutorial:
> 
> with python sets,   intersections  and unions are supposed to be done
> like this:
> In [7]:set('casa') & set('porca')
> Out[7]:set(['a', 'c'])
> 
> In [8]:set('casa') | set('porca')
> Out[8]:set(['a', 'c', 'o', 'p', 's', 'r'])
> 
> and they work correctly. Now what is confusing is that if you do:
> 
> In [5]:set('casa') and set('porca')
> Out[5]:set(['a', 'p', 'c', 'r', 'o'])
> 
> In [6]:set('casa') or set('porca')
> Out[6]:set(['a', 'c', 's'])
> 
> The results are not what you would expect from an AND  or OR
> operation, from the mathematical point of view! aparently the "and"
> operation is returning the the second set, and the "or" operation is
> returning the first.
> 
> If python developers wanted these operations to reflect the
> traditional (Python) truth value for data structures: False for empty
> data structures and True otherwise, why not return simply True or
> False?
> 
> So My question is: Why has this been implemented in this way? I can
> see this confusing many newbies...

It has nothing to do with sets - it stems from the fact that certain values
in python are considered false, and all others true. And these semantics
were introduced at a point where there was no explicit True/False, so the
operators were defined in exact the way you observed.

Consider this:

"foo" or "bar" -> "foo"

So - nothing to do with sets.

Diez




From fw3 at hotmail.co.jp  Thu Aug  2 20:00:13 2007
From: fw3 at hotmail.co.jp (wang frank)
Date: Fri, 03 Aug 2007 00:00:13 +0000
Subject: Tkinter or wxpython?
In-Reply-To: <op.tv98rva4wepdt4@ericb.pragmadev>
Message-ID: <BAY122-F34510145833EB9AE9D1D91B4EA0@phx.gbl>


Hi, 

I want to build a GUI to execut python script. I found TKinter and 
wxpython. Which one is easier for a newbie? and which one is better?

Thanks

Frank

_________________________________________________________________
??????????????????????????????????????
? http://clk.atdmt.com/GBL/go/msnjpqjl0060000010gbl/direct/01/ 



From steven.bethard at gmail.com  Mon Aug 27 10:36:52 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 27 Aug 2007 08:36:52 -0600
Subject: Parser Generator?
In-Reply-To: <1188218409.525240.300590@o80g2000hse.googlegroups.com>
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
	<1188159150.755231.239390@o80g2000hse.googlegroups.com>
	<mailman.11.1188176757.28954.python-list@python.org>
	<1188185192.735485.237740@57g2000hsv.googlegroups.com>
	<HtCdnaSzROkM1E_bnZ2dnUVZ_tmhnZ2d@comcast.com>
	<1188218409.525240.300590@o80g2000hse.googlegroups.com>
Message-ID: <XK-dnSNEXtgafE_bnZ2dnUVZ_gydnZ2d@comcast.com>

Paul McGuire wrote:
> On Aug 26, 10:48 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
>> In Japanese and Chinese tokenization, word boundaries are not marked by
>> different classes of characters. They only exist in the mind of the
>> reader who knows which sequences of characters could be words given the
>> context, and which sequences of characters couldn't.
>>
>> The closest analog would be to ask pyparsing to find the words in the
>> following sentence:
>>
>> Thepyparsingmoduleprovidesalibraryofclassesthatclientcodeusestoconstructthe?grammardirectlyinPythoncode.
>>
>> Most approaches that have been even marginally successful on these kinds
>> of tasks have used statistical machine learning approaches.
> 
> You mean like this?
> 
> from pyparsing import *
> 
> knownWords = ['of', 'grammar', 'construct', 'classes', 'a',
>     'client', 'pyparsing', 'directly', 'the', 'module', 'uses',
>     'that', 'in', 'python', 'library', 'provides', 'code', 'to']
> 
> knownWord = oneOf( knownWords, caseless=True )
> sentence = OneOrMore( knownWord ) + "."
> 
> mush =
> "ThepyparsingmoduleprovidesalibraryofclassesthatclientcodeusestoconstructthegrammardirectlyinPythoncode."
> 
> print sentence.parseString( mush )
> 
> prints:
> 
> ['the', 'pyparsing', 'module', 'provides', 'a', 'library', 'of',
> 'classes', 'that', 'client', 'code', 'uses', 'to', 'construct',
> 'the', 'grammar', 'directly', 'in', 'python', 'code', '.']
> 
> In fact, this is almost the exact scheme used by Zhpy for extracting
> Chinese versions of Python keywords, and mapping them back to English/
> Latin words.  Of course, this is not practical for natural language
> processing, as the vocabulary gets too large. And you can get
> ambiguous matches, such as a vocabulary containing the words ['in',
> 'to', 'into'] - the runtogether "into" will always be assumed to be
> "into", and never "in to".

Yep, and these kinds of things occur quite frequently with Chinese and 
Japanese. The point was not that pyparsing couldn't do it for a small 
subset of characters/words, but that pyparsing is probably not the right 
solution for general purpose Japanese/Chinese tokenization.

Steve


From bj_666 at gmx.net  Wed Aug  1 02:15:28 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 1 Aug 2007 06:15:28 GMT
Subject: Extending Python by Adding Keywords & Data types
References: <1185913739.879602.212950@w3g2000hsg.googlegroups.com>
	<5h9n66F3j641tU5@mid.uni-berlin.de>
	<1185932558.472578.103690@o61g2000hsh.googlegroups.com>
Message-ID: <5hamnvF3inuf2U2@mid.uni-berlin.de>

On Wed, 01 Aug 2007 01:42:38 +0000, Maximus Decimus wrote:

> Since, I am an amateur in using python, could you please be more
> specific. For new data types, you had asked to implement the classes.
> I intend to use C for implementing these data types. So where do i
> need to implement these classes ie under which file or module in the
> python package.

Like Ben Finney said, first do something about the amateur status and work
through the tutorial.

Everything in Python is an object.  And classes are a way to define
templates for new objects.  After you know classes better, ask yourself
how you would implement the already existing data types with classes
yourself and then you'll get an idea how to create new data types.

If you want to implement new types in C there's a tutorial in the docs
called ?Extending and Embedding? and a reference of the Python/C API.

But maybe you should start with implementing them in Python and only
convert those parts to C code that are *really* to slow in the prototype. 
Really means measure and don't guess.

A nice step between Python and C is Pyrex, a Python-like language with some
restrictions but also C data types.  Pyrex is then translated to C and can
be compiled as Python extension module.

Ciao,
	Marc 'BlackJack' Rintsch


From brian at rkspeed-rugby.dk  Wed Aug  1 16:48:31 2007
From: brian at rkspeed-rugby.dk (Brian Elmegaard)
Date: Wed, 01 Aug 2007 19:48:31 -0100
Subject: Floats as keys in dict
References: <u1wenwq26.fsf@rkspeed-rugby.dk>
	<1i25pz7.3m2bya88wujkN%aleax@mac.com>
	<mailman.1435.1185982335.22759.python-list@python.org>
Message-ID: <ups270yn4.fsf@rkspeed-rugby.dk>

Steve Holden <steve at holdenweb.com> writes:

> Alex Martelli wrote:

[snip]

Thanks a lot for your intersting answers. I will start out taking a
look at bisect.


-- 
Brian (remove the sport for mail)
http://www.et.web.mek.dtu.dk/Staff/be/be.html
http://www.rugbyklubben-speed.dk


From arkanes at gmail.com  Sun Aug 19 19:12:47 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Sun, 19 Aug 2007 18:12:47 -0500
Subject: desperately in need of a tool
In-Reply-To: <1187560418.339131.283470@i38g2000prf.googlegroups.com>
References: <1187560418.339131.283470@i38g2000prf.googlegroups.com>
Message-ID: <4866bea60708191612o56dbda64id210a561808de125@mail.gmail.com>

On 8/19/07, yagyala <mbrown at phys.ksu.edu> wrote:
> Hi.
>
> I recently started working for a company that has just implemented its
> first set of software standards. So far, so good. Here's the problem:
> one of those standards is that the comments for each routine must
> indicate every other routine that it calls. As I try to keep my
> routines small, and factor out methods alot, this can lead to an
> enormous ammount of extra typing. I really, really, really don't want
> to do this by hand. Does anyone know of a tool that could do this for
> me, or at least a tool that can tell what other routines a given
> routine calls that I could program against? (Preferably something that
> works under pydev, but I'm not going to be choosy.)
>
> I'm sure some will wonder about the reasoning of this standard. The
> company primarily has experience writing scientific alogorythms which
> can get rather long. It makes a bit more sense to document all
> routines called for a very long routine, but for short routines that
> primarily call other routines, as most mine do, well....
>
> Thanks.
>

To the extent that it's useful to do this at all in Python (dynamic
method invocation is impossible determine, and polymorphic method
invocations you can't pinpoint), pycallgraph
(http://pycallgraph.slowchop.com/) can do this.

> --
> http://mail.python.org/mailman/listinfo/python-list
>


From 3dbernard at gmail.com  Fri Aug 31 14:10:07 2007
From: 3dbernard at gmail.com (Bernard Lebel)
Date: Fri, 31 Aug 2007 14:10:07 -0400
Subject: [python 3.0] reload() gone?
Message-ID: <61d0e2b40708311110l5a13819fh4e6b2aafe928b44d@mail.gmail.com>

I read in the Python 3.0 documentation that reload() was removed,
without further explanations.

http://docs.python.org/dev/3.0/whatsnew/3.0.html?highlight=reload


So what are we supposed to do to reload modules?


Thanks
Bernard


From rcdailey at gmail.com  Thu Aug 16 18:26:09 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Thu, 16 Aug 2007 17:26:09 -0500
Subject: Pass by reference or by value?
In-Reply-To: <46C4CCAD.3080104@holdenweb.com>
References: <496954360708161402x58faba47x7a6eae6e68f81d4@mail.gmail.com>
	<fa2gbe$uq7$1@sea.gmane.org>
	<496954360708161501s541bddb7vfe168e4863f7f1e@mail.gmail.com>
	<46C4CCAD.3080104@holdenweb.com>
Message-ID: <496954360708161526o5b6a0fffof2fbd5227244e709@mail.gmail.com>

Thanks Steve for your explanation. It was very helpful. I think I understand
it now. By the way, by the .set method I meant:

class Integer:
    def __init__( self, number=0 ):
       self._int = number

    def set( self, number ):
       self._int = number


# later on....

mutableInt = Integer( 5 )
def change_me( var ):
    var.set( 6 )


Of course, I'd probably use overloaded operators in a more realized example.


On 8/16/07, Steve Holden <steve at holdenweb.com> wrote:
>
> Robert Dailey wrote:
> > So immutable objects cannot be modified directly? I guess this means
> > integers are immutable and the act of assigning to one is a completely
> > new definition?
>
> Correct. A new value is bound to the name or item on the left-hand side
> - remember, all variables are pointers to values, there's no way to
> replace the value of a variable because of the automatic dereferencing.
> And yes, immutable objects can't be modified. At all, period. Hence the
> name.
>
> >                 So if I were to create a class called Integer and give
> > it a .set() method, this would allow me to create mutable integers, and
> > thus passing in an object of type class Integer would allow me to modify
> > the value from inside the function?
> >
> Well, the .set() method wouldn't be called automatically on an
> assignment statement but yes, if you passed an Integer object into your
> function and called its .set() method from inside then it should work.
>
> As long as you get your mutable integer implementation correct, of
> course ;-). I'd suggest delegating everything except the .set() method
> to the underlying integer value.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd           http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------
>
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From ptmcg at austin.rr.com  Wed Aug  1 19:58:03 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 01 Aug 2007 16:58:03 -0700
Subject: Extending Python by Adding Keywords & Data types
In-Reply-To: <1185999017.188830.88860@d55g2000hsg.googlegroups.com>
References: <1185913739.879602.212950@w3g2000hsg.googlegroups.com>
	<1185973687.883520.227540@k79g2000hse.googlegroups.com>
	<1185999017.188830.88860@d55g2000hsg.googlegroups.com>
Message-ID: <1186012683.676225.261070@k79g2000hse.googlegroups.com>

On Aug 1, 3:10 pm, Maximus Decimus <pingmaxi... at gmail.com> wrote:
>
> Your code snippet was quite simple and it explained me very well than
> the tutorial. HAts off to u!!
>
Thanks!

<snip>

>
> I am doing my research in Pervasive space environments filled with
> sensors and actuators. I am just trying to modify an existing language
> which suits that kind of environment. Pervasive space environment is
> filled with sensors and actuators and everything depends on their
> state and behavior ie on the sensor readings and actuator states. So
> why not express a language variable in terms of sensors and actuators?
> THis is my idea of working around and trying to introduce new data
> types for these sensor and actuator variables which store sensor
> readings and actuator states.
>
> I think this explains a bit clearly on what I am looking
> for..Suggestion and ideas are kindly appreciated.
>
> Thanks in advance and for your time.

You got me thinking about a little exercise I did a long time ago,
using overloaded operators to help model circuits of resistors in
series and parallel.  Here is one way to model some physical objects
using notation that is particular to their own domain (and even
counter to the conventional uses of that notation, as noted in the
docstrings).  See below:

class Resistor(object):
    def __init__(self,r):
        self.resistance = r

    def __sub__(self,other):
        """R1-R2 looks like two resistors in series, nevermind
           that we are using a subtraction operator to perform
           what is essentially an addition operation.  Think of
           the horizontal line as a circuit connecting the two
           resistors."""
        return Resistor(self.resistance + other.resistance)

    def __or__(self,other):
        "R1 | R2 looks like two resistors in parallel, sort of"
        return Resistor(float(self.resistance * other.resistance) /
                        float(self.resistance + other.resistance))

    def colorCode(self):
        """insert nifty routine here to convert self.resistance to
           sequence of color bands"""
        pass

    def __repr__(self):
        return "Resistor(%s)" % self.resistance

r1 = Resistor(100)
r2 = Resistor(200)

print r1-r2  # resistors in series
print r1 | r2 # resistors in parallel
print r1 | r1 | r2  # three resistors in parallel, not so easy math
print (r1 - r1) | r2 # two resistors in series in parallel with
another
print r1 - (r1 | r1)

Prints:

Resistor(300)
Resistor(66.6666666667)
Resistor(40.0)
Resistor(100.0)
Resistor(150.0)

This is just using vanilla Python with some tricky operator
interpreting.

You can also do some syntax manipulation using the import hooks (first
shown to me by Wilson Fowlie).  Here is an example of modeling an in-
memory state machine, with some customized syntax. (http://
www.geocities.com/ptmcg/python/stateMachine.html)  This is more
involved, and requires a custom parser, but let's not get distracted
down that path...

Just some more alternatives to mucking about in the Python compiler.

-- Paul



From zzbbaadd at aol.com  Thu Aug 30 19:39:24 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Thu, 30 Aug 2007 16:39:24 -0700
Subject: list index()
In-Reply-To: <87fy20d2lt.fsf@benfinney.id.au>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au>
	<1188492060.983148.90000@r34g2000hsd.googlegroups.com>
	<87fy20d2lt.fsf@benfinney.id.au>
Message-ID: <1188517164.844790.109150@q4g2000prc.googlegroups.com>

On Aug 30, 4:28 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> zzbba... at aol.com writes:
> > On Aug 30, 12:09 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> > > It's letting you know that the item isn't in the list. There's no
> > > sensible return value from an "index" function in that condition.
>
> > for str:
> > find(      sub[, start[, end]])
> > [...]
> > Return -1 if sub is not found.
>
> > -1 is used in other languages as well.
>
> It is no more sensible there than in the 'str.find' method, which is a
> historical wart.

One man's sensible is another man's insensible. For instance, some
people feel -1 as a valid index into a list is sensible. Other's find
it insensible.

>
> --
>  \     "Hey Homer! You're late for English!"  "Pff! English, who needs |
>   `\       that? I'm never going to England!"  -- Barney & Homer, _The |
> _o__)                                                        Simpsons_ |
> Ben Finney




From horpner at yahoo.com  Mon Aug 13 09:37:26 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 13 Aug 2007 13:37:26 GMT
Subject: Adventure-Engines in Python
References: <mailman.1905.1186997614.22759.python-list@python.org>
	<46c02fdd$0$14405$afc38c87@news.optusnet.com.au>
Message-ID: <slrnfc0khm.1us.horpner@FIAD06.norwich.edu>

On 2007-08-13, Richard Jones <richardjones at optushome.com.au> wrote:
> Wildemar Wildenburger wrote:
>> Are there any?
>
> An adventure game was written for one of the PyWeek challenges:
>
> http://www.pyweek.org/e/aerunthar/
>
> You might be able to use that as a starting point.

Here's an abondoned (since Python 2.2), but basically complete
system:

  http://members.nuvox.net/~zt.wolf/PAWS.htm

For a taste of what it looked like, see the PAWS section of Roger
Firth's IF system comparison page, _Cloak of Darkness_. 

http://www.firthworks.com/roger/cloak/
http://www.firthworks.com/roger/cloak/paws/index.html

This contains a P.A.W.S version of the very simple example game.
The author of the example is somewhat suspect, however.

As far as I know, no full game was ever written in PAWS. Once you
try it, you'll possibly see why no interactive fiction system
distributed as a library for a general-purpose language has ever
caught on. Every system that's enjoyed even moderate success has
been a language+library implementation.

-- 
Neil Cerutti


From exarkun at divmod.com  Tue Aug 14 15:44:31 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 14 Aug 2007 15:44:31 -0400
Subject: curses library
In-Reply-To: <20070814214551.1cb50566.ghirai@ghirai.com>
Message-ID: <20070814194431.4947.517778923.divmod.quotient.21969@ohm>

On Tue, 14 Aug 2007 21:45:51 +0300, Ghirai <ghirai at ghirai.com> wrote:
>On Tue, 14 Aug 2007 18:27:16 GMT
>Neil Cerutti <horpner at yahoo.com> wrote:
>
>> On 2007-08-14, Ghirai <ghirai at ghirai.com> wrote:
>> > I need to write a console application.
>> >
>> > Are there any wrappers around curses/ncurses?
>> > Or any other similar libraries?
>>
>> The answer depends on your chosen platform. Python hasn't got a
>> cross-platform console library as one of its included batteries.
>>
>> First try the curses module. It does come with Python on systems
>> with a curses port.
>>
>> For Windows, there's the Effbot's console module.
>> http://effbot.org/zone/console-index.htm
>>
>> Or go to plan B: Use a Tkinter or other GUI interface's text
>> widget.
>
>Forgot to say, i don't need it to work on windows :)

You might be interested in insults:

API docs:

  http://twistedmatrix.com/documents/current/api/twisted.conch.insults.html

Examples:

  http://twistedmatrix.com/projects/conch/documentation/examples/

Jean-Paul


From frikker at gmail.com  Thu Aug 16 15:53:49 2007
From: frikker at gmail.com (frikk)
Date: Thu, 16 Aug 2007 12:53:49 -0700
Subject: Accessing Windows Network Share?
In-Reply-To: <mailman.2072.1187291034.22759.python-list@python.org>
References: <1187287133.737105.169960@19g2000hsx.googlegroups.com>
	<mailman.2071.1187289811.22759.python-list@python.org>
	<1187289961.104183.104910@50g2000hsm.googlegroups.com>
	<mailman.2072.1187291034.22759.python-list@python.org>
Message-ID: <1187294029.192682.299110@g4g2000hsf.googlegroups.com>

On Aug 16, 3:03 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/16/07, frikk <frik... at gmail.com> wrote:
>
>
>
>
>
> > On Aug 16, 2:43 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> > > On 8/16/07, frikk <frik... at gmail.com> wrote:
>
> > > > I previously posted about accessing SharePoint over the web. Well I
> > > > have since given up any easy means of doing this, since something else
> > > > has perked my interest.  Instead of going tohttp://sharepoint/site,
> > > > why not just access \\sharepoint\site\ directly?
>
> > > > So my question is this - How do I access that network share?
>
> > > > If I go to start -> run, and type in "\\SharPointServer\Site\Folder",
> > > > windows explorer will pop up with it.  I suppose I could have a little
> > > > batch script that python runs to map the drive to a local letter, like
> > > > J:, but this does not seem necessary.
>
> > > > Suggestions?
>
> > > > This does not work, for obvious reasons:
> > > > >>> import glob.glob
> > > > >>> glob.glob("\\\\server\\folder\\*")
> > > > []
>
> > > I don't see whats "obvious" about this. Access to windows shares is
> > > handled by Windows in a VFS layer, and glob and all other Python file
> > > access works fine over them for me.- Hide quoted text -
>
> > > - Show quoted text -
>
> > Haha ok, you're right its not obvious. Sorry for that.
>
> > But that code does not work - should it?
>
> > Do you have an example of glob working over a file share, not a
> > network mapped drive?
>
> import glob
> glob.glob(r"\\localhost\c$\python25\libs\*")
> ['\\\\localhost\\c$\\python25\\libs\\bz2.lib',
> '\\\\localhost\\c$\\python25\\libs\\libpython25.a',
> '\\\\localhost\\c$\\python25\\libs\\pyexpat.lib',
> '\\\\localhost\\c$\\python25\\libs\\python25.lib',
> '\\\\localhost\\c$\\python25\\libs\\select.lib',
> '\\\\localhost\\c$\\python25\\libs\\unicodedata.lib',
> '\\\\localhost\\c$\\python25\\libs\\winsound.lib',
> '\\\\localhost\\c$\\python25\\libs\\_bsddb.lib',
> '\\\\localhost\\c$\\python25\\libs\\_ctypes.lib',
> '\\\\localhost\\c$\\python25\\libs\\_ctypes_test.lib',
> '\\\\localhost\\c$\\python25\\libs\\_elementtree.lib',
> '\\\\localhost\\c$\\python25\\libs\\_hashlib.lib',
> '\\\\localhost\\c$\\python25\\libs\\_msi.lib',
> '\\\\localhost\\c$\\python25\\libs\\_socket.lib',
> '\\\\localhost\\c$\\python25\\libs\\_sqlite3.lib',
> '\\\\localhost\\c$\\python25\\libs\\_ssl.lib',
> '\\\\localhost\\c$\\python25\\libs\\_testcapi.lib',
> '\\\\localhost\\c$\\python25\\libs\\_tkinter.lib']
>
> I do it all the time. I'd double check your slash escaping (consider
> using r'') and pathnames.- Hide quoted text -
>
> - Show quoted text -

I must have been doing it wrong.  Thanks! That works great!



From bignose+hates-spam at benfinney.id.au  Mon Aug  6 19:37:32 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 07 Aug 2007 09:37:32 +1000
Subject: Emacs + python.
References: <00tzrdm1zd.fsf@googlemail.com>
Message-ID: <87myx48car.fsf@benfinney.id.au>

Hadron <hadronquark at googlemail.com> writes:

> Sorry to repeat, but I had to reinstall and lost all my news.

Fortunately, there's no need to repeat, because the forum is archived
both as a Usenet newsgroup and a mailing list.

    <URL:http://groups.google.com/group/comp.lang.python/>
    <URL:http://mail.python.org/pipermail/python-list/>

-- 
 \         "What you have become is the price you paid to get what you |
  `\                              used to want."  -- Mignon McLaughlin |
_o__)                                                                  |
Ben Finney


From zyzhu2000 at gmail.com  Wed Aug  1 13:16:37 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Wed, 01 Aug 2007 17:16:37 -0000
Subject: Assertion in list comprehension
In-Reply-To: <mailman.1439.1185985738.22759.python-list@python.org>
References: <1185982643.001546.138180@e16g2000pri.googlegroups.com>
	<mailman.1439.1185985738.22759.python-list@python.org>
Message-ID: <1185988597.055293.106540@q3g2000prf.googlegroups.com>

On Aug 1, 11:28 am, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/1/07, beginner <zyzhu2... at gmail.com> wrote:
>
>
>
>
>
> > Hi,
>
> > Does anyone know how to put an assertion in list comprehension? I have
> > the following list comprehension, but I want to use an assertion to
> > check the contents of rec_stdl. I ended up using another loop which
> > essentially duplicates the functions of list comprehension. It just
> > look like a waste of coding and computer time to me.
>
> > I just wish I could put the assertions into list comprehensions.
>
> >         x=[(rec_stdl[0].st/10000.0,
> >             rec_stdl[0].cl,
> >             rec_stdl[0].bb,
> >             rec_stdl[0].bo,
> >             rec_stdl[1].bb,
> >             rec_stdl[1].bo,
> >             rec_stdl[0].ex
> >            )
> >            for rec_stdl in rec_by_ex if len(rec_stdl)==2
> >         ]
>
> >         #duplicated loop
> >         if __debug__:
> >             for rec_stdl in rec_by_ex:
> >                 l=len(rec_stdl)
> >                 assert(l<=2 and l>0)
> >                 if l==2:
> >                     assert(rec_stdl[0].c=="C" and rec_stdl[1].c=="P")
> >                     assert(rec_stdl[0].ex==rec_stdl[1].ex)
> >                     assert(rec_stdl[0].st==rec_stdl[1].st)
> >                     assert(rec_stdl[0].cp==rec_stdl[1].cp)
>
> First: All your asserts are wrong. Assert is a statement, not a
> function. These specific ones will behave as expected, but it's easy
> to accidentally write ones that always pass this way.


Do you mean I should not use the parentheses?


> Secondly: This is a waste of code, because if __debug__ is not defined
> asserts will be skipped by the compiler. You could use the same loop
> block for both branches.

I know. My original question was how. Dan suggested to write a checker
function.


> Thirdly: This sort of testing is precisely what unit tests and/or
> doctests are for.

Agreed.



From james.p.news at gmail.com  Tue Aug 21 18:45:00 2007
From: james.p.news at gmail.com (james.p.news at gmail.com)
Date: Tue, 21 Aug 2007 22:45:00 -0000
Subject: libgmail failure
In-Reply-To: <1187733545.529286.78980@50g2000hsm.googlegroups.com>
References: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
	<1187733545.529286.78980@50g2000hsm.googlegroups.com>
Message-ID: <1187736300.755595.227150@x35g2000prf.googlegroups.com>

Thanks for the suggestion.  I've tried logging in and sending email
manually and it works just fine.

Thanks though,
James



From http  Thu Aug 16 00:46:29 2007
From: http (Paul Rubin)
Date: 15 Aug 2007 21:46:29 -0700
Subject: ElementTree surprise
Message-ID: <7xd4xoxf16.fsf@ruckus.brouhaha.com>

I have a doc with a bunch of fields like:

    <foo bar="spam">stuff</foo>
    <foo bar="penguin">other stuff</foo>

and sometimes

    <foo bar="parrot"></foo>

I use ElementTree to parse the doc and I use the .text attribute
to get "stuff" or "other stuff" in the spam and penguin examples.

I'd expect .text to be the empty string in the parrot example, but
instead it is None.

I can fix my script to deal with this, but it's surprising.  Is it
intentional?  I could understand it being None if the doc had said

   <foo bar="parrot"/>

but that is different.

Disclaimer: I'm not even slightly an XML expert, I just find myself
having to deal with a lot of it.


From gagsl-py2 at yahoo.com.ar  Wed Aug 15 12:39:57 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 15 Aug 2007 13:39:57 -0300
Subject: Simple python iteration question
References: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
	<20070814163430.GJ22017@lass.lfod.us>
	<mailman.1974.1187110840.22759.python-list@python.org>
	<c5cbp4-6r4.ln1@lairds.us>
Message-ID: <op.tw30kvgvx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 15 Aug 2007 10:37:16 -0300, Cameron Laird <claird at lairds.us>  
escribi?:

> Shawn Milochik <Shawn at Milochik.com> wrote:
>> Just for my own sanity: Isn't this the third response advocating the
>> use of enumerate()? Did the other responses not get through, or was
>> this a time-delay thing?
>Yes, for a variety of reasons, it's easy for it to happen that
> all three-or-more enumerate-responders independently saw the
> original question, but not any of their colleagues' responses.
>
> Sometime we'll tell a few Usenet funnies about The Old Days
> when transport included tape-backup-driven-by-private-car.

"Never underestimate the bandwidth of a station wagon full of tapes  
hurtling down the highway"
(Andrew S. Tanenbaum, Computer Networks, 1996; maybe the origin is much  
older)

-- 
Gabriel Genellina



From wpdster at gmail.com  Tue Aug 14 13:26:46 2007
From: wpdster at gmail.com (Patrick Doyle)
Date: Tue, 14 Aug 2007 13:26:46 -0400
Subject: pure python gaussian blur
In-Reply-To: <1187108679.401416.224060@19g2000hsx.googlegroups.com>
References: <1187108679.401416.224060@19g2000hsx.googlegroups.com>
Message-ID: <e2a1d0aa0708141026i5c55d269j8b77fc8bfa7514ec@mail.gmail.com>

On 8/14/07, Gerdus van Zyl <gerdusvanzyl at gmail.com> wrote:
> Does anyone have a relatively fast gaussian blur implemented in pure
> python? Below is my attempt but it takes 2.9 seconds for a 320x240
> image. Image comes from byte string: self.array =
> array.array('B',srcstring). Would some sort of matrix multiplication
> be faster? I don't have experience in that.
>
> I don't want to use PIL or http://filters.sourceforge.net/ to avoid
> the 300kb dll just for a simple blur.
>
The one time I tried something similar (implementing a signal
processing function in Python), I found NumPy to be _significantly_
faster -- which makes sense, since all of the matrix arithmetic was
implemented in hard coded, compiled C code instead of interpreted byte
code.

--wpd


From uymqlp502 at sneakemail.com  Fri Aug 31 15:17:26 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Fri, 31 Aug 2007 12:17:26 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1i3p8lm.19738kn1q0gkouN%aleax@mac.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<7xwsvcc9yz.fsf@ruckus.brouhaha.com>
	<1i3p8lm.19738kn1q0gkouN%aleax@mac.com>
Message-ID: <1188587846.687895.69240@q5g2000prf.googlegroups.com>


Alex Martelli wrote:

> Russ specifically mentioned *mission-critical applications* as being
> outside of Python's possibilities; yet search IS mission critical to
> Google.  Yes, reliability is obtained via a "systems approach",

Alex, I think you are missing the point. Yes, I'm sure that web
searches are critical to
Google's mission and commercial success. But the point is that a few
subtle bugs cannot
destroy Google. If your search engines and associated systems have
bugs, you fix them
(or simply tolerate them) and continue on. And if a user does not get
the results he wants,
he isn't likely to die over it -- or even care much.

Online financial transactions are another matter altogether, of
course. User won't die, but
they will get very irate if they lose money. But I don't think that's
what you are talking about
here.



From uymqlp502 at sneakemail.com  Thu Aug 30 18:11:12 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Thu, 30 Aug 2007 15:11:12 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <mailman.166.1188505565.28954.python-list@python.org>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<1188430887.481586.106760@l22g2000prc.googlegroups.com>
	<mailman.159.1188499976.28954.python-list@python.org>
	<1188504811.019632.186580@x35g2000prf.googlegroups.com>
	<mailman.166.1188505565.28954.python-list@python.org>
Message-ID: <1188511872.294065.5090@z24g2000prh.googlegroups.com>


> Things get vetted *before* they get added to the core, not after.

I realize that. I meant that it would get vetted in the process of
putting it into the core. That
would provide more confidence that it was done the best possible way
-- or close to it.



From frikker at gmail.com  Thu Aug 16 14:46:01 2007
From: frikker at gmail.com (frikk)
Date: Thu, 16 Aug 2007 11:46:01 -0700
Subject: Accessing Windows Network Share?
In-Reply-To: <mailman.2071.1187289811.22759.python-list@python.org>
References: <1187287133.737105.169960@19g2000hsx.googlegroups.com>
	<mailman.2071.1187289811.22759.python-list@python.org>
Message-ID: <1187289961.104183.104910@50g2000hsm.googlegroups.com>

On Aug 16, 2:43 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/16/07, frikk <frik... at gmail.com> wrote:
>
>
>
>
>
> > I previously posted about accessing SharePoint over the web. Well I
> > have since given up any easy means of doing this, since something else
> > has perked my interest.  Instead of going tohttp://sharepoint/site,
> > why not just access \\sharepoint\site\ directly?
>
> > So my question is this - How do I access that network share?
>
> > If I go to start -> run, and type in "\\SharPointServer\Site\Folder",
> > windows explorer will pop up with it.  I suppose I could have a little
> > batch script that python runs to map the drive to a local letter, like
> > J:, but this does not seem necessary.
>
> > Suggestions?
>
> > This does not work, for obvious reasons:
> > >>> import glob.glob
> > >>> glob.glob("\\\\server\\folder\\*")
> > []
>
> I don't see whats "obvious" about this. Access to windows shares is
> handled by Windows in a VFS layer, and glob and all other Python file
> access works fine over them for me.- Hide quoted text -
>
> - Show quoted text -

Haha ok, you're right its not obvious. Sorry for that.

But that code does not work - should it?

Do you have an example of glob working over a file share, not a
network mapped drive?



From bdesth.quelquechose at free.quelquepart.fr  Wed Aug 29 09:35:48 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 29 Aug 2007 15:35:48 +0200
Subject: Accessing docstrings at runtime?
In-Reply-To: <mailman.109.1188412138.28954.python-list@python.org>
References: <011b01c7ea69$95512fe0$e6003dcc@worf2>
	<mailman.109.1188412138.28954.python-list@python.org>
Message-ID: <46d5bf47$0$291$426a74cc@news.free.fr>

Chris Mellon a ?crit :
> On 8/29/07, Kenneth Love <klove at tax.ok.gov> wrote:
> 
>>How do I print the docstring for a class property?
(snip)
> You're looking at an instance, not at the class. y.x is going through
> the descriptor lookup and is returning the string, so the __doc__ is
> the the __doc__ of the string object, as you see.
> 
> If you want to look at the property directly, look it up in the class object:
> 
> C.x.__doc__

Or type(y).x.__doc__ if you don't know the class of y.


From owntheweb at gmail.com  Wed Aug 29 21:46:11 2007
From: owntheweb at gmail.com (Ultrus)
Date: Thu, 30 Aug 2007 01:46:11 -0000
Subject: replacing xml elements with other elements using lxml
In-Reply-To: <1188428655.300330.213430@r29g2000hsg.googlegroups.com>
References: <1188399381.188639.289480@57g2000hsv.googlegroups.com>
	<46D5A272.2000509@web.de>
	<1188428655.300330.213430@r29g2000hsg.googlegroups.com>
Message-ID: <1188438371.064824.13020@l22g2000prc.googlegroups.com>

Ah! I figured it out. I forgot that the tree is treated like a list.
The solution was to replace the <random> element with the first <item>
child, then use Python's insert(i,x) function to insert elements after
the first one.

lxml rocks!



From thomas at jollans.com  Mon Aug  6 12:59:44 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Mon, 6 Aug 2007 18:59:44 +0200
Subject: udp, datagram sockets
In-Reply-To: <1186416225.769753.307110@o61g2000hsh.googlegroups.com>
References: <1186416225.769753.307110@o61g2000hsh.googlegroups.com>
Message-ID: <200708061859.44884.thomas@jollans.com>

On Monday 06 August 2007, 7stud wrote:
> I'm trying to understand datagrams.  My client program sends a message
> to the server, and then the server infinitely loops over the recv() to
> make sure all the data was received.  I'm trying to use an * to signal
> the end of the message, so that the server can break out of the
> infinite while loop used to check the recv().  However, my server
> repeatedly outputs the client message over and over again.  Can anyone
> tell me why?
>
> When I start the server, I get the following debug output as
> expected:
>
> ---------
> debug: start outer while loop
> #this infinite while loop endlessly listens for messages from the
> client
>
> debug: recv while loop
> #this infinite while loop checks to make sure the whole message was
> received
> -----------
>
> and then the recv() blocks and waits for data to be sent by the
> client. But when I start the client, the server repeatedly outputs the
> client message over and over again.   My expectation was that after
> processing the message from the client, the server would block the
> next time it executed the recv() statement and wait for more data from
> the client.
>
> client:
> ----------
> import socket
>
> s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
>
> message = "hello*" #asterisk to delimit end of message
> msg_size = len(message)
> total_sent = 0
>
> print "debug:", total_sent, msg_size
>
> while total_sent < msg_size:
>     size_sent = s.sendto(message[total_sent:], ("localhost", 7777) )
>     total_sent += size_sent
>
>     print "debug:", total_sent, msg_size
>
> print 'debug: while loop ended'
> s.close()
> -----------
>
> Here's the client output:
>
> -------------
> debug: 0 6
> debug: 6 6
> debug: while loop ended
> ---------------
>
>
> server:
> ------------------
> import socket
> import sys
>
> s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
> s.bind(("", 7777))
>
> try:
>     while True:  #This loop listens endlessly for messages.
>         print "debug: start outer while loop"
>
>         #Receive messages from client:
>         my_list = []
>         while True:  #This loop checks to see if the whole message was
> received.
>             print "debug: recv while loop"
>
>             data  = s.recv(1024)
>             my_list.append(data)
>
>             if data.rfind("*"):
>                 message = "".join(my_list)
>                 print "Received message:\n%s" % message[:-1]
>                 break
>
>
>         #Send messages back to client:
>         total_sent = 0
>         while total_sent < len(message):
>             print "debug: send while loop"
>
>             size_sent = s.sendto(message[total_sent:], ("localhost",
> 7777) )
>             total_sent += size_sent
>
>             print "debug:", total_sent, len(message)
>
> finally:
>     s.close()
> --------------------------
>
> Here's the server output:
>
> ---------------
> debug: start outer while loop
> debug: recv while loop
> Received message:
> hello
> debug: send while loop
> debug: 6 6
> debug: start outer while loop
> debug: recv while loop
> Received message:
> hello
> debug: send while loop
> debug: 6 6
> ....
> ....
> ....
> ------------------

You don't make any attempt to break out of the outer loop. (break breaks the 
innermost loop)


From arkanes at gmail.com  Wed Aug  1 14:07:55 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 1 Aug 2007 13:07:55 -0500
Subject: Assertion in list comprehension
In-Reply-To: <1185991170.993822.175970@z24g2000prh.googlegroups.com>
References: <1185982643.001546.138180@e16g2000pri.googlegroups.com>
	<mailman.1439.1185985738.22759.python-list@python.org>
	<1185988597.055293.106540@q3g2000prf.googlegroups.com>
	<mailman.1446.1185989748.22759.python-list@python.org>
	<1185991170.993822.175970@z24g2000prh.googlegroups.com>
Message-ID: <4866bea60708011107i59e46f6fwb64c8f2bade01721@mail.gmail.com>

On 8/1/07, beginner <zyzhu2000 at gmail.com> wrote:
> On Aug 1, 12:35 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> > On 8/1/07, beginner <zyzhu2... at gmail.com> wrote:
> >

<much snippage>

> I see. In fact I want to whole block surrounded by __debug__ to be
> optimized away in non-debug runs. If the logic of my program is
> correct, the asserts are guaranteed to be true, no matter what the
> input is. It is not input checking.
>

I inferred as much. That's why placing it in a unit or doctest is even better.


From stephen.y4ng at gmail.com  Tue Aug 14 15:09:51 2007
From: stephen.y4ng at gmail.com (stephen.y4ng at gmail.com)
Date: Tue, 14 Aug 2007 19:09:51 -0000
Subject: try/finally exceptions dying
Message-ID: <1187118591.965164.6120@w3g2000hsg.googlegroups.com>

Hello all,

In order to churn through a whole bunch of data sets (some good, some
bad..) and get all the errors at the end, (the data will be updated to
make it all good later on) I implemented a try/finally block with a
higher level handler to catch errors before they propagate to the
default handler and crash the program. Something like this:

def doStuff(args):
  if(args says we should keep going):
    try:
       stuff
    finally:
       update args
       doStuff(updated args)

 def runWithErrorHandling():
   try:
     doStuff(args)
   except (exception1, exception2), data:
       <handle exception here...>
       append exception data to a list of errors

 runWithErrorHandling()

unfortunately, this churns through all the data and I only get the
last exception that occurred in the error list, not all of them, as I
expected. What is going on? I thought finally always propagated the
exception all the way up the stack until it was handled.

Any thoughts are appreciated.

Stephen



From sjmachin at lexicon.net  Fri Aug 31 17:54:26 2007
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 31 Aug 2007 14:54:26 -0700
Subject: strings (dollar.cents) into floats
In-Reply-To: <1188586725.667740.255700@o80g2000hse.googlegroups.com>
References: <mailman.140.1188483282.28954.python-list@python.org>
	<877incd20i.fsf@benfinney.id.au>
	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
	<1188575044.874256.42960@50g2000hsm.googlegroups.com>
	<fb9eas$tnc$1@sea.gmane.org>
	<mailman.218.1188577696.28954.python-list@python.org>
	<46d84a47$0$1346$834e42db@reader.greatnowhere.com>
	<1188586725.667740.255700@o80g2000hse.googlegroups.com>
Message-ID: <1188597266.831144.201450@m37g2000prh.googlegroups.com>

On Sep 1, 4:58 am, MRAB <goo... at mrabarnett.plus.com> wrote:
> On Aug 31, 5:39 pm, David H Wild <dhw... at talktalk.net> wrote:> In article <mailman.218.1188577696.28954.python-l... at python.org>,
> >    Chris Mellon <arka... at gmail.com> wrote:
>
> > > I believe that to the degree that "real" accounting was done in those
> > > currencies it did in fact use non-decimal bases. Just as people don't
> > > use decimal time values (except us crazy computer folk), you're write
> > > 1 pound 4 shillings, not 1.333... pounds.
>
> > When I worked on the British Railways National Payroll system, about 35
> > years ago, we, in common with many large users, wrote our system to deal
> > with integer amounts of pennies, and converted to pounds, shillings and
> > pence in the output part of the system.
>
> So you never handled halfpennies?

Or farthings?



From yinglcs at gmail.com  Sun Aug 19 02:55:34 2007
From: yinglcs at gmail.com (yinglcs at gmail.com)
Date: Sun, 19 Aug 2007 06:55:34 -0000
Subject: Python library for RTSP protocol
Message-ID: <1187506534.781746.317970@z24g2000prh.googlegroups.com>

Hi,

Can you please tell me if there is a Python library which can talk
RTSP/RTP protocol?
i.e. i would like to write a script in python to download a video via
a RTSP server?

Thank you.



From cbarton at metavr.com  Sun Aug  5 07:31:23 2007
From: cbarton at metavr.com (Campbell Barton)
Date: Sun, 05 Aug 2007 21:31:23 +1000
Subject: Best programs written completly in Python
In-Reply-To: <20070805112006.GA3558@gmail.com>
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
	<20070805112006.GA3558@gmail.com>
Message-ID: <46B5B50B.8040803@metavr.com>

O.R.Senthil Kumaran wrote:
> * Franz Steinh?usler <franz.steinhaeusler at gmx.at> [2007-08-05 12:14:38]:
> 
>> wWhat are the best programs in your opinion, written entirly
>> in pyhton, divided into categories like:
>> a) Games
>> b) Utilities/System
>> c) Office
>> d) Web/Newsreader/Mail/Browser
> 
> Its a difficult question to answer as the software are aplenty and there is no
> judgement basis as this one is the best.
> 
> Head on to www.python.org and see for yourself for programs under each
> category.
> 
> And moreover, "written entirely in python" is a constrain to find the
> programs. Why do you need such a list for?

Of course this is totally objective, but that dosnt mean its not a valid 
question.

If you were starting out a project were thinking of writing it in 
python, you might want to look at whats out there - maybe python has 
limitations which stops it being a good choice in some situations (for 
instance?)- on the other hand you might want to see some shining 
examples that prove the capabilities of python ;)

'Being written entirely in python' - is a bit tricky, often these 
applications rely on some specific extension or make heavy use of a 
backend that dosnt come with python (like pygame, pygtk, or py-gstreamer).

Games - See Pygame http://www.pygame.org/projects/6


Utilities/System

* meld is a really nice diffing tool for linux - http://meld.sourceforge.net
* ubuntu have some of their install tools in python.
* txt2tags - a great markup language for doc writing. - 
http://txt2tags.sourceforge.net/
* sound recording/editing - http://www.jokosher.org

Office?? - no idea, openoffice can be scripted in python.

Web - * isnt bit torrent python?, probably lots of stuff but I dont know 
of them ;)


From mark.dufour at gmail.com  Mon Aug 20 08:31:40 2007
From: mark.dufour at gmail.com (Mark Dufour)
Date: Mon, 20 Aug 2007 14:31:40 +0200
Subject: Shed Skin Python-to-C++ compiler 0.0.23
Message-ID: <8180ef690708200531r7eca18b1y96c65b72b0ddce35@mail.gmail.com>

Hi all,

I have just released Shed Skin 0.0.23. It doesn't contain the type
inference scalability improvements I was working on, but it does have
quite a few bug fixes and minor feature additions. Here's a list of
changes:

-support for __iadd__, __imul__ and such (except __ipow__ and __imod__)
-some overdue set optimizations
-fix for string formatting problem (%% did not always work)
-extension module stability fixes
-fix for particular inheritance problem
-other minor bugfixes, cleanups, and error messages

I could really use some systematic help in pushing Shedskin further. Some ideas:

-send in bug reports - these are extremely valuable and motivating to
me, yet I don't receive many..
-find out why test 148 is currently broken under windows
-add datetime, re or socket support
-look into supporting custom classes in generated extension modules
-write a Shedskin tutorial for 'novice' programmers
-systemically test performance and suggest and work on improvements
-investigate replacements for std::string and __gnu_cxx::hash_set
-perform janitorial-type work in ss.py and lib/builtin.?pp
-support extension modules under OSX (OSX gives me accute mental RSI)
-add more tests to unit.py


Thanks,
Mark Dufour.
--
"One of my most productive days was throwing away 1000 lines of code"
- Ken Thompson


From xavier.martinezhidalgo at gmail.com  Wed Aug 29 05:07:41 2007
From: xavier.martinezhidalgo at gmail.com (xavim)
Date: Wed, 29 Aug 2007 09:07:41 -0000
Subject: Error handling in file generation (Pythonic way: with /
	decorators?)
In-Reply-To: <1188377932.955314.104570@r29g2000hsg.googlegroups.com>
References: <1188377932.955314.104570@r29g2000hsg.googlegroups.com>
Message-ID: <1188378461.388224.164030@50g2000hsm.googlegroups.com>

On Aug 29, 10:58 am, xavim <xavier.martinezhida... at gmail.com> wrote:
> (...)
>     try:
> (...)
>     except:
>         os.remove(dictpath)

This should read::

    try:
        (...)
    except:
        os.remove(dictpath)
        raise

Sorry.



From victor.lebrun at gmail.com  Thu Aug  2 12:01:15 2007
From: victor.lebrun at gmail.com (vml)
Date: Thu, 02 Aug 2007 16:01:15 -0000
Subject: python 3.0, pywin32 and scipy
Message-ID: <1186070475.659511.24130@q3g2000prf.googlegroups.com>

Hello,


I am trying to promote python in my job, my collegue only see matlab
and microsoft scripting language.
I understood that there willl be no backward compatibility between
python 2.x and 3.0, does it means that:

- my script using pywin32 for the COM layer and scipy for the maths
won't work under 3.0
- will we have the equivalent of pywin32 and scipy in python ?

I will be incharge of designing a python module which will be a
'matrix calculator' in our current software. Will it be compatible
with python 3.0 ? I guess no.

What can I answer to my collegue who will say 'Python is changing and
the stuff you are doing now is useless'?

how can I argue against matlab and c# ?

thanks very much



From eggie5 at gmail.com  Thu Aug  9 22:28:34 2007
From: eggie5 at gmail.com (eggie5)
Date: Fri, 10 Aug 2007 02:28:34 -0000
Subject: beginner whitespace question
In-Reply-To: <f9gf4u$3al$2@daisy.noc.ucla.edu>
References: <1186703261.136506.208660@x35g2000prf.googlegroups.com>
	<1186703525.591462.122140@m37g2000prh.googlegroups.com>
	<1186704161.334597.218750@z24g2000prh.googlegroups.com>
	<1186707164.095766.243480@q3g2000prf.googlegroups.com>
	<1186708404.901323.204730@g12g2000prg.googlegroups.com>
	<f9gf03$3al$1@daisy.noc.ucla.edu> <f9gf4u$3al$2@daisy.noc.ucla.edu>
Message-ID: <1186712914.174266.300080@j4g2000prf.googlegroups.com>

On Aug 9, 6:31 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> James Stroud wrote:
> >     def __unicode__(self):
That's so goofy.....

> >     return self.choice


>
> Laughing to hard at the tab & spaces thing to notice the lack of
> indentation here.
>
> James
>
> --
> James Stroud
> UCLA-DOE Institute for Genomics and Proteomics
> Box 951570
> Los Angeles, CA 90095
>
> http://www.jamesstroud.com/




From aisaac at american.edu  Fri Aug 31 10:36:58 2007
From: aisaac at american.edu (Alan Isaac)
Date: Fri, 31 Aug 2007 14:36:58 GMT
Subject: create Powerpoint via com
In-Reply-To: <1188567291.037504.232850@r34g2000hsd.googlegroups.com>
References: <j7EBi.13372$Yg.7724@trnddc02>
	<1188500822.869925.194430@e9g2000prf.googlegroups.com>
	<EaNBi.20336$vg.15115@trnddc04>
	<1188567291.037504.232850@r34g2000hsd.googlegroups.com>
Message-ID: <eIVBi.12$6T5.8@trnddc06>

>>How about chart creation (in Ppt 2003)?
>>I do not see how to do this with Python.

kyosohma at gmail.com wrote:
> You probably need to browse the COM object using PythonWin, which is a
> part of the ActiveState distro. You can also use Python's builtin
> function, dir, to find out various methods of COM.
> 
> Here's some info in messing with charts in Excel, which should be
> similar to chart manipulation in PowerPoint.
> 
> http://mail.python.org/pipermail/python-win32/2005-June/003511.html
> http://mail.python.org/pipermail/python-win32/2003-March/000839.html
> http://www.thescripts.com/forum/thread21565.html
> http://mathieu.fenniak.net/plotting-in-excel-through-pythoncom/


Thanks!
Alan


From evan at yelp.com  Thu Aug  2 01:22:53 2007
From: evan at yelp.com (Evan Klitzke)
Date: Wed, 1 Aug 2007 22:22:53 -0700
Subject: access the name of my method inside it
In-Reply-To: <1185973639.234450.305690@g12g2000prg.googlegroups.com>
References: <1185959202.302467.276080@x35g2000prf.googlegroups.com>
	<5hb1ebF3inuf2U6@mid.uni-berlin.de>
	<1185973639.234450.305690@g12g2000prg.googlegroups.com>
Message-ID: <cfb58d850708012222s42c7abbfh6d29126b63b48e24@mail.gmail.com>

On 8/1/07, james_027 <cai.haibin at gmail.com> wrote:
> Hi,
>
> On Aug 1, 5:18 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> > On Wed, 01 Aug 2007 09:06:42 +0000, james_027 wrote:
> > > for example I have this method
> >
> > > def my_method():
> > >     # do something
> >
> > >     # how do I get the name of this method which is my_method here?
> >
> > Why do you need this?  There are ways but those are not really good for
> > production code.
> >
>
> I am going to use this in Django. I am trying to implement a
> permission here, where in the database store the methods that the user
> are allowed to execute. for example if the method is def
> create_event(): the method will look for create_event in the database
> to see if it allow to be execute.
>
> Thanks.
> james

I would suggest instead setting an attribute on the function object
via a decorator, and then have your mod_python handler check for the
presence of that attribute on the function that is being called,
rather than doing a DB lookup.

-- 
Evan Klitzke <evan at yelp.com>


From vedrandekovic at v-programs.com  Tue Aug  7 13:28:49 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Tue, 07 Aug 2007 10:28:49 -0700
Subject: distutils
In-Reply-To: <mailman.1718.1186502459.22759.python-list@python.org>
References: <1186489676.042901.236140@w3g2000hsg.googlegroups.com>
	<mailman.1710.1186491267.22759.python-list@python.org>
	<1186497517.224280.126070@22g2000hsm.googlegroups.com>
	<mailman.1718.1186502459.22759.python-list@python.org>
Message-ID: <1186507729.075722.21300@57g2000hsv.googlegroups.com>

On 7 kol, 18:00, Steve Holden <st... at holdenweb.com> wrote:
> vedrandeko... at v-programs.com wrote:
> > On 7 kol, 14:53, Steve Holden <st... at holdenweb.com> wrote:
> >> vedrandeko... at v-programs.com wrote:
> >>> Hello again,
> >>> Is there any patch for python "distutils", for this
> >>>>>> from distutils import log,dir_util
> >>> ImportError: cannot import name log
> >> What version of Python are you running with? It looks as though there
> >> may be something wrong with your installation if it's recent:
>
> >> sholden at bigboy ~/Projects/Python
> >> $ python
> >> Python 2.5.1 (r251:54863, May 18 2007, 16:56:43)
> >> [GCC 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)] on cygwin
> >> Type "help", "copyright", "credits" or "license" for more information.
> >>  >>> from distutils import log
> >>  >>> import distutils.log
>
> > Hello,
>
> > My version of python is 2.4 and I'am running it with Windows XP
>
> Your installation must be corrupted, then:
>
> Microsoft Windows XP [Version 5.1.2600]
> (C) Copyright 1985-2001 Microsoft Corp.
>
> C:\Steve>\python24\python
> Python 2.4.4 (#71, Oct 18 2006, 08:34:43) [MSC v.1310 32 bit (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> from distutils import log
>  >>>
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------

Hi,

Is there any other solution I need this for script installing with
setuptools,now I was install and Python 2.5 too,but same error
again.

PS: I was try your previously example also:

cd c:\Python24\python

then:
>>> from distutils import log - but same error again

any other solution?

Regards,
Vedran



From mirandacascade at yahoo.com  Tue Aug 14 15:24:11 2007
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: Tue, 14 Aug 2007 12:24:11 -0700
Subject: post xml payload with urllib
In-Reply-To: <f9su1q$4e6$1@solaris.cc.vt.edu>
References: <f9su1q$4e6$1@solaris.cc.vt.edu>
Message-ID: <1187119451.527124.192460@x35g2000prf.googlegroups.com>

On Aug 14, 11:57 am, brad <byte8b... at gmail.com> wrote:
> Has anyone sent an xml payload via post using urllib?

Haven't used urllib, but have used urllib2 to do a POST.

Might something like this work...

import urllib2

logon_request = """<LoginRequest>
    <password>"the_password"</password>
    <user>"the_user"</user>
 </LoginRequest>"""

req = urllib2.Request("https://127.0.0.1/api/version/xml",
data=logon_request)
openObj = urllib2.urlopen(req)
response = openObj.read()






From steve at holdenweb.com  Fri Aug 31 11:05:01 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 11:05:01 -0400
Subject: Setting a read-only attribute
In-Reply-To: <1188509700.915517.178440@z24g2000prh.googlegroups.com>
References: <1188509700.915517.178440@z24g2000prh.googlegroups.com>
Message-ID: <fb9amv$e3l$3@sea.gmane.org>

tleeuwenburg at gmail.com wrote:
> I have an object and wish to set an attribute on it which,
> unfortunately for me, is read-only.
> 
> How can I go about this?
> 
This seems like a bizarre requirement. Why is the attribute read-only in 
the first place? How is the read-only mechanism enforced? Is the object 
created in Python or in an extension module? Do you have any evidence 
that "setting" the attribute will effect the required change in the 
behavior of the object.

A little more information would be helpful.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From cai.haibin at gmail.com  Wed Aug  1 09:07:19 2007
From: cai.haibin at gmail.com (james_027)
Date: Wed, 01 Aug 2007 13:07:19 -0000
Subject: access the name of my method inside it
In-Reply-To: <5hb1ebF3inuf2U6@mid.uni-berlin.de>
References: <1185959202.302467.276080@x35g2000prf.googlegroups.com>
	<5hb1ebF3inuf2U6@mid.uni-berlin.de>
Message-ID: <1185973639.234450.305690@g12g2000prg.googlegroups.com>

Hi,

On Aug 1, 5:18 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Wed, 01 Aug 2007 09:06:42 +0000, james_027 wrote:
> > for example I have this method
>
> > def my_method():
> >     # do something
>
> >     # how do I get the name of this method which is my_method here?
>
> Why do you need this?  There are ways but those are not really good for
> production code.
>

I am going to use this in Django. I am trying to implement a
permission here, where in the database store the methods that the user
are allowed to execute. for example if the method is def
create_event(): the method will look for create_event in the database
to see if it allow to be execute.

Thanks.
james



From gagsl-py2 at yahoo.com.ar  Fri Aug 24 15:21:25 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 24 Aug 2007 16:21:25 -0300
Subject: how to tar with python
References: <93066C069973ED448DC2BCEA9C44A7383BE2EF@efmailx>
Message-ID: <op.txkv1zfjx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 24 Aug 2007 10:03:30 -0300, Brian McCann  
<Brian.McCann at viziant.net> escribi?:

> I'm trying to tar the contents of a directory "test" which contains
> 3 files     foo1.xml ,foo2.xml, foo3.xml
> in my current directory /home/pythonbox/tmp I have the directory "test"
> if I run the below script it fails with the below error, but the files  
> exist in the directory test

Add a print statement and see what you get:

> tfile = tarfile.open("files.tar.gz", 'w:gz')
> files = os.listdir("test")
> for f in files:
	print f
>         tfile.add(f)
> tfile.close

See <http://docs.python.org/lib/module-os.path.html#l2h-2176>

-- 
Gabriel Genellina



From larry.bates at websafe.com  Thu Aug  2 10:34:16 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 02 Aug 2007 09:34:16 -0500
Subject: Determining if file is valid image file
In-Reply-To: <1186064275.652416.250540@d55g2000hsg.googlegroups.com>
References: <1186064098.587590.91210@g4g2000hsf.googlegroups.com>
	<1186064275.652416.250540@d55g2000hsg.googlegroups.com>
Message-ID: <y8mdnUpZ3s_7dizbnZ2dneKdnZydnZ2d@comcast.com>

Andr? wrote:
> On Aug 2, 11:14 am, Andr? <andre.robe... at gmail.com> wrote:
>> Other than installing PIL, is there a "simple" way using Python only
>> to determine if a file is a valid image file?
>>
>> I'd be happy if I could at least identify valid images files for gif,
>> jpeg and png.   Pointers to existing modules or examples would be
>> appreciated.
>>
>> The reason why I'd prefer not using PIL is that I'd like to bundle
>> such a function/module in my app.
>>
>> Andr?
> 
> I should have added: I'm interesting in validating the file *content*
> - not the filename :-)
> 
And what's wrong with bundling PIL in your application?

-Larry


From steve at holdenweb.com  Thu Aug 16 18:16:13 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Aug 2007 18:16:13 -0400
Subject: Pass by reference or by value?
In-Reply-To: <496954360708161501s541bddb7vfe168e4863f7f1e@mail.gmail.com>
References: <496954360708161402x58faba47x7a6eae6e68f81d4@mail.gmail.com>	
	<fa2gbe$uq7$1@sea.gmane.org>
	<496954360708161501s541bddb7vfe168e4863f7f1e@mail.gmail.com>
Message-ID: <46C4CCAD.3080104@holdenweb.com>

Robert Dailey wrote:
> So immutable objects cannot be modified directly? I guess this means 
> integers are immutable and the act of assigning to one is a completely 
> new definition? 

Correct. A new value is bound to the name or item on the left-hand side 
- remember, all variables are pointers to values, there's no way to 
replace the value of a variable because of the automatic dereferencing. 
And yes, immutable objects can't be modified. At all, period. Hence the 
name.

>                 So if I were to create a class called Integer and give 
> it a .set() method, this would allow me to create mutable integers, and 
> thus passing in an object of type class Integer would allow me to modify 
> the value from inside the function?
> 
Well, the .set() method wouldn't be called automatically on an 
assignment statement but yes, if you passed an Integer object into your 
function and called its .set() method from inside then it should work.

As long as you get your mutable integer implementation correct, of 
course ;-). I'd suggest delegating everything except the .set() method 
to the underlying integer value.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From kyosohma at gmail.com  Tue Aug  7 09:29:03 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 07 Aug 2007 06:29:03 -0700
Subject: get position is scrolled wxScrolledWindow
In-Reply-To: <mailman.1703.1186460431.22759.python-list@python.org>
References: <mailman.1703.1186460431.22759.python-list@python.org>
Message-ID: <1186493343.051931.238670@i38g2000prf.googlegroups.com>

On Aug 6, 11:20 pm, Astan Chee <st... at al.com.au> wrote:
> Hi,
> I have a wxScrolledWindow, and some things drawn on it. I've hooked the
> left click event to a certain function I've got. Anyway, everytime I do
> a event.GetPosition() on the position of the mouse on the
> wxScrolledWindow, it returns the physical location or position of the
> mouse. Does anyone have any examples or advice on how to get the real or
> position of the window including where it has been scrolled?
> Thanks
> Astan

This sounds like a job for the wxPython list. You should try posting
there: http://www.wxpython.org/maillist.php

I also found this: http://aspn.activestate.com/ASPN/Mail/Message/wxpython-users/3536900

Mike



From iclark at mail.ewu.edu  Fri Aug 17 18:51:49 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Fri, 17 Aug 2007 15:51:49 -0700
Subject: Question on SPE and pwintypes.dll
In-Reply-To: <1187357898.740425.33170@r29g2000hsg.googlegroups.com>
References: <1187357898.740425.33170@r29g2000hsg.googlegroups.com>
Message-ID: <fa58q5$1oo$1@sea.gmane.org>

Gerry wrote:
>... but the OS wasn't migrated  ...

There's your problem right there. It's hard to run most software these 
days without an OS.

Ian



From frikker at gmail.com  Fri Aug  3 08:54:57 2007
From: frikker at gmail.com (frikk)
Date: Fri, 03 Aug 2007 12:54:57 -0000
Subject: Memory Leak with Tkinter Canvas (Python 2.5 Win32)
In-Reply-To: <mailman.1557.1186124329.22759.python-list@python.org>
References: <1186068851.011344.322980@i13g2000prf.googlegroups.com>
	<mailman.1557.1186124329.22759.python-list@python.org>
Message-ID: <1186145697.617374.189030@o61g2000hsh.googlegroups.com>

On Aug 3, 2:26 am, "Hendrik van Rooyen" <m... at microcorp.co.za> wrote:
> "frikk" <fr...l.com> wrote:
> >   1.  ....... Am I somehow leaving
> > objects laying around that aren't being deleted? Is create_rectangle
> > not the appropriate function to use?)
>
> Try calling the canvas's delete method with the old rectangle before
> making a new one.
>
> - Hendrik

Hey guys-

  Both of your suggestions were perfect - I was just unaware I was
actually creating new *object* instead of drawing on the canvas.  noob
mistake.  Thanks again!

-Blaine



From Dominic at PLEASEASK.co.uk  Thu Aug  9 10:46:49 2007
From: Dominic at PLEASEASK.co.uk (special_dragonfly)
Date: Thu, 9 Aug 2007 15:46:49 +0100
Subject: tests
References: <mailman.1792.1186665714.22759.python-list@python.org>
	<1186666919.456036.120270@d30g2000prg.googlegroups.com>
	<f9f70t$dpm$1@solaris.cc.vt.edu>
	<1186670584.148181.180040@r34g2000hsd.googlegroups.com>
Message-ID: <46bb2511$0$10103$7b0f0fd3@mistral.news.newnet.co.uk>


<dijkstra.arjen at gmail.com> wrote in message 
news:1186670584.148181.180040 at r34g2000hsd.googlegroups.com...
> On Aug 9, 4:04 pm, brad <byte8b... at gmail.com> wrote:
>> kyoso... at gmail.com wrote:
>> > You should be able to read chunks of each file in binary mode and do a
>> > compare to check for equality. Some kind of loop should do the trick.
>>
>> Why not a simple md5 or sha with the hash library?
>
> Or even:
>
> http://docs.python.org/lib/module-filecmp.html
>

My understanding of reading that is that it only looks at the file names 
themselves and not their contents. So whether filename1=filename2 and in the 
case of the function below it, whether one directory has files which are in 
the other.
Correct me if I'm wrong.
Dom

P.S. md5 or sha hash is what I'd go for, short of doing:

MyFirstFile=file("file1.xls")
MySecondFile=file("file2.xls")
If MyFirstFile==MySecondFile:
    print "True"

although this won't tell you where they're different, just that they are... 




From junkeun.park at gmail.com  Thu Aug  9 19:06:14 2007
From: junkeun.park at gmail.com (Jun-geun Park)
Date: Thu, 09 Aug 2007 19:06:14 -0400
Subject: Threaded Design Question
In-Reply-To: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
References: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
Message-ID: <f9g6l6$1icp$1@grapevine.csail.mit.edu>

half.italian at gmail.com wrote:
> Hi all!  I'm implementing one of my first multithreaded apps, and have
> gotten to a point where I think I'm going off track from a standard
> idiom.  Wondering if anyone can point me in the right direction.
> 
> The script will run as a daemon and watch a given directory for new
> files.  Once it determines that a file has finished moving into the
> watch folder, it will kick off a process on one of the files.  Several
> of these could be running at any given time up to a max number of
> threads.
> 
> Here's how I have it designed so far.  The main thread starts a
> Watch(threading.Thread) class that loops and searches a directory for
> files.  It has been passed a Queue.Queue() object (watch_queue), and
> as it finds new files in the watch folder, it adds the file name to
> the queue.
> 
> The main thread then grabs an item off the watch_queue, and kicks off
> processing on that file using another class Worker(threading.thread).
> 
> My problem is with communicating between the threads as to which files
> are currently processing, or are already present in the watch_queue so
> that the Watch thread does not continuously add unneeded files to the
> watch_queue to be processed.  For example...Watch() finds a file to be
> processed and adds it to the queue.  The main thread sees the file on
> the queue and pops it off and begins processing.  Now the file has
> been removed from the watch_queue, and Watch() thread has no way of
> knowing that the other Worker() thread is processing it, and shouldn't
> pick it up again.  So it will see the file as new and add it to the
> queue again.  PS.. The file is deleted from the watch folder after it
> has finished processing, so that's how i'll know which files to
> process in the long term.
> 
> I made definite progress by creating two queues...watch_queue and
> processing_queue, and then used lists within the classes to store the
> state of which files are processing/watched.
> 
> I think I could pull it off, but it has got very confusing quickly,
> trying to keep each thread's list and the queue always in sync with
> one another.  The easiset solution I can see is if my threads could
> read an item from the queue without removing it from the queue and
> only remove it when I tell it to.  Then the Watch() thread could then
> just follow what items are on the watch_queue to know what files to
> add, and then the Worker() thread could intentionally remove the item
> from the watch_queue once it has finished processing it.
> 
> Now that I'm writing this out, I see a solution by over-riding or
> wrapping Queue.Queue().get() to give me the behavior I mention above.
> 
> I've noticed .join() and .task_done(), but I'm not sure of how to use
> them properly.  Any suggestions would be greatly appreciated.
> 
> ~Sean
> 

1) Use a (global) hash table and a mutex on it. Before a worker thread
starts processing a file, have the worker acquire the mutex, add the
filename into a global dictionary as a key, and release the mutex.  Then,
when the watcher thread attempts to read a file, it only has to check
whether the filename is on the table.

If different files may have a same name, you can also use size or some
other signatures. Also, I think basic operations on primitive types on
Python are atomic so you don't actually need mutex, but in threaded
programs, it's always a good habit to use mutexes explicitly.

2) If the watcher thread doesn't spend much time in "recognizing" files 
to process,
simply make the watcher thread reads many(or all) files in the directory,
put them all in the queue, and wait until all items in the queue are 
processed
using .join(). Workers can indicate that the processing of the last 
dequeued item
is done by calling .task_done() (As soon as all items are flaged 
"task_done()", join() will
unblock.) After processing of files on the queue are all done,
watcher can move or remove processed files and read the directory again. 
Of course,
you need to keep track of "recognized" files of that turn.


From horpner at yahoo.com  Tue Aug  7 10:37:52 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 07 Aug 2007 14:37:52 GMT
Subject: All leading tabs or all leading spaces - why isn't that enforced?
References: <y8Rti.1088$3x.121@newssvr25.news.prodigy.net>
	<f98qa9$n9v$2@sea.gmane.org>
	<mailman.1714.1186495736.22759.python-list@python.org>
Message-ID: <slrnfbh04g.254.horpner@FIAD06.norwich.edu>

On 2007-08-07, Omari Norman <omari at smileystation.com> wrote:
>> I suppose we Pythonistas are just too permissive for our own good. 
>> Consider the opportunity to use mixed tabs and spaces a piece of rope of 
>> your preferred length ...
>
> I thought I remembered reading somewhere that Python 3000 will
> ban tabs as indentation characters, but now I can't turn up a
> link for it...

Tabs are going to be banned in the C Style Guide for Python 3000
source code, but they aren't being banned from Python 3000 code.

-- 
Neil Cerutti
The concert held in Fellowship Hall was a great success. Special thanks are
due to the minister's daughter, who labored the whole evening at the piano,
which as usual fell upon her. --Church Bulletin Blooper


From yozara at terra.es  Fri Aug 24 07:44:54 2007
From: yozara at terra.es (Zara)
Date: Fri, 24 Aug 2007 13:44:54 +0200
Subject: Regular expression use
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
Message-ID: <mpgtc3hr203aq336pidf20njthab0ie737@4ax.com>

On 24 Aug 2007 10:58:46 GMT, nmm1 at cus.cam.ac.uk (Nick Maclaren) wrote:

>
>For reasons that I won't explain, as they are too complicated
>and not terribly relevant, I am interested in discovering what
>people actually use regular expressions for.  Not the subject
>domain, but the construction of the regular expressions.
>
>I know about computer scientists and parsing, and I know about
>the use of relatively simple ones for things like extracting
>HTML links from Web pages.  But I don't have much feel for the
>(probably rare but difficult) uses of more complex ones for
>other purposes.  I have heard of several such uses, but don't
>have an overall idea of what is going on.
>
>Any pointers appreciated, to more-or-less anything.
>

In the linked project, regular expression are used to parse
communication protocol responses, file contents, and interporocess
communcation (at least).

They may not be pretty elegant solutions, but this is the first
project I made in python (and also with regex)!!

NOTE: I am the author, and I swear the application is free of viruses,
it has been fully developed with a python and a WingWare standar
installation, and it will only deposit some files on your
$python$/Lib/site-packages folder. 
Any comments welcome.

NOTE2: Software in spanish, but it should not be pretty difficult to
follow (I hope!)

best regards,

Zara

http://www.albalaing.com/Firmware.aspx?id_firmware=2359



From proteusguy at gmail.com  Tue Aug 21 12:45:41 2007
From: proteusguy at gmail.com (proteusguy at gmail.com)
Date: Tue, 21 Aug 2007 16:45:41 -0000
Subject: yet another indentation proposal
In-Reply-To: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
Message-ID: <1187714741.642908.139930@x40g2000prg.googlegroups.com>

On Aug 18, 2:22 pm, "Aaron" <cajnnjo... at fjireanjtjprodjuctijons.com>
wrote:
> Hello all.
>
> I realize that proposals dealing with alternatives to indentation  have been
> brought up (and shot down) before, but I would like to take another stab at
> it, because it is rather important to me.
>
> I am totally blind, and somewhat new to Python.  I put off learning Python
> for a long time, simply because of the indentation issue.  There is no easy
> way for a screenreader user, such as my self, to figure out how much a
> particular line of code is indented.  A sited person simply looks down the
> column to make sure that everything lines up.  I, on the other hand,
> generally find my self counting a lot of spaces.
<snip>

    Very interesting 'reading' code verbally. I would think this would
be far less efficient than using a braille line display, especially if
there were a multi-line display which I'm not sure exists (but
should). Anyway, as someone who is a very fond of python's use of
indentation for flow control, I also see that it is not always
appropriate for EVERY form of computing I'd like to apply python too
and I wish there were an alternative control flow form which was
considered valid in all respects but frowned upon when not used in the
exception cases intended. Also it should be a form in which a parser
could easily convert back and forth from at ease so you could code in
one format and deploy in another.

    Besides your excellent example, the context that I have in mind is
embedded python running in a web browser ala javascript. You
absolutely cannot count on whitespace when your code is going through
the parser/converter gauntlet that the typical html page must go
through before being delivered to its requestor. As a student of
language design I find javascript an abomination and have long
wondered whether or not this dependency on whitespace hasn't taken
python out of the running from being a very popular and appropriate
contender. (I realize that the restricted execution environment of old
python was abandoned but maybe browser python is a strict subset?)

    I really am not at the point of making this a proposal. Really I'm
just curious as to whether or not I'm the only person who thinks this
and would like to see if the concept has any traction. This is no low
impact concept so I'm not holding my breath. I will say, however, that
the web browser would be a far more pleasant development environment
if it spoke python rather than javascript. I feel strongly that its
the best internet service language (wonderful std libs) and its OO and
functional paradigm would play nicely in a browser environment. I have
python on all my computers regardless of operating system and cpu. I
have python embedded in C++ apps and C++ apps embedded in python.
Python runs on my phone! Python runs on the JVM and the CLR. Python
runs everywhere - except my browser.

    ...just dreaming...

    -- Ben



From aleax at mac.com  Sun Aug 19 16:04:17 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 19 Aug 2007 13:04:17 -0700
Subject: Parser Generator?
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
	<_6mdnZxbdNKTVFrbnZ2dnUVZ_tqtnZ2d@comcast.com>
	<xHWxi.1073$vU4.633@nlpi068.nbdc.sbc.com>
	<fbadnTQA4qe6F1XbnZ2dnUVZ_s-pnZ2d@comcast.com>
Message-ID: <1i33g9h.1i48q26dmp7l5N%aleax@mac.com>

Jack <nospam at invalid.com> wrote:

> Thanks for the suggestion. I understand that more work is needed for natural
> language
> understanding. What I want to do is actually very simple - I pre-screen the
> user
> typed text. If it's a simple syntax my code understands, like, Weather in
> London, I'll
> redirect it to a weather site. Or, if it's "What is ... " I'll probably
> redirect it to wikipedia.
> Otherwise, I'll throw it to a search engine. So, extremelyl simple stuff ...

<http://nltk.sourceforge.net/index.php/Main_Page>

"""
NLTK ? the Natural Language Toolkit ? is a suite of open source Python
modules, data sets and tutorials supporting research and development in
natural language processing.
"""


Alex


From jvines at arl.army.mil  Fri Aug  3 12:16:04 2007
From: jvines at arl.army.mil (Vines, John  (Civ, ARL/CISD))
Date: Fri, 3 Aug 2007 12:16:04 -0400
Subject: Idlelib TreeWidget (UNCLASSIFIED)
Message-ID: <56D23B61D58733478FA4E0C1434AAC582834C6@ARLABML02.DS.ARL.ARMY.MIL>

Classification:  UNCLASSIFIED 
Caveats: NONE
 
Does anyone have any experience using the idlelib TreeWidget module?  I
am using it to display XML files and would like to include some editing
capabilities.  Does anyone have any examples I could take a look at?

Thanks,
John

 
Classification:  UNCLASSIFIED 
Caveats: NONE
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From aleax at mac.com  Wed Aug  1 11:04:58 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 1 Aug 2007 08:04:58 -0700
Subject: Floats as keys in dict
References: <u1wenwq26.fsf@rkspeed-rugby.dk>
Message-ID: <1i25pz7.3m2bya88wujkN%aleax@mac.com>

Brian Elmegaard <brian at rkspeed-rugby.dk> wrote:

> I am making a script to optimiza by dynamic programming. I do not know
> the vertices and nodes before the calculation, so I have decided to
> store the nodes I have in play as keys in a dict.
> 
> However, the dict keys are then floats and I have to round the values
> of new possible nodes in each step. When profiling I see that the most
> time consuming part of my script is rounding.
> 
> Is there a faster way than round() or is there a better way to test
> than 'in' or should I store the keys in another way than a dict?

You may want to consider keeping a sorted list and using standard
library module bisect for searches and insertions -- its behavior is
O(log N) for a search, O(N) for an insertion, but it might be that in
your case saving the rounding could be worth it.

Otherwise, you need to consider a different container, based either on
comparisons (e.g. AVL trees, of which there are several 3rd party
implementations as Python extensions) or on a hashing function that will
give the same hash for two numbers that are "close enough" (e.g., hash
ignoring the lowest N bits of the float's mantissa for some N).

round() operates on decimals and that may not be as fast as working on
binary representations, but, to be fast, a helper function giving the
"hash of a binary-rounded float" would have to be coded in C (or maybe
use psyco).


Alex


From dejanews at email.com  Sat Aug 18 07:13:45 2007
From: dejanews at email.com (samwyse)
Date: Sat, 18 Aug 2007 06:13:45 -0500
Subject: unexpected optparse set_default/set_defaults behavior
In-Reply-To: <1187359921.637383.268380@22g2000hsm.googlegroups.com>
References: <1187359921.637383.268380@22g2000hsm.googlegroups.com>
Message-ID: <IwAxi.2163$LL7.1819@nlpi069.nbdc.sbc.com>

mbeachy at gmail.com wrote:
> Some rather unexpected behavior in the set_default/set_defaults
> methods for OptionParser that I noticed recently:
[...]
> Why does set_default not raise an exception when passed a key that it
> doesn't recognize?
> 
> Bad typysts bewaer.
> 
> The only reason I can think not to raise an exception is so that
> defaults can be defined before the options are added. Is there some
> use case that I'm not thinking of here? I realize that changing this
> could break some existing scripts, but I'm still tempted to file this
> as a bug.

If you file it as a bug then I can assure you that you'll be told of a 
long list of use-cases that depend on that feature.


From gdamjan at gmail.com  Wed Aug  1 13:45:31 2007
From: gdamjan at gmail.com (Damjan)
Date: Wed, 01 Aug 2007 19:45:31 +0200
Subject: Python IMAP web-access
Message-ID: <46b0c675$0$90272$14726298@news.sunsite.dk>

Is there some project that implements web access to an IMAP store?

Maybe something AJAXy like http://roundcube.net/??


-- 
damjan


From gagsl-py2 at yahoo.com.ar  Mon Aug 20 23:46:16 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Aug 2007 20:46:16 -0700
Subject: mode parameter in popen2-4
In-Reply-To: <46c9ed0d$0$8173$88260bb3@free.teranews.com>
References: <46c9ed0d$0$8173$88260bb3@free.teranews.com>
Message-ID: <1187667976.155385.33740@g4g2000hsf.googlegroups.com>

On 20 ago, 17:26, Tobiah <t... at tobiah.org> wrote:

> In the popen docs, a file like object is returned,
> and may be read to or written to depending on the
> 'mode' parameter ('r', or 'w').
>
> Why is the mode parameter needed for popen2 and greater,
> when both a stdin and stdout object is returned?  One
> wouldn't want to 'append' to a stream.... is it because
> binary mode can still be turned on and off this way?

Exactly. For popen[234] the mode parameter can be either 't' or 'b',
not 'r' or 'w' - which you could have learned easily reading the
documentation at <http://docs.python.org/lib/os-newstreams.html> and
<http://docs.python.org/lib/module-popen2.html>

--
Gabriel Genellina



From bohemaida at gmail.com  Mon Aug  6 18:22:05 2007
From: bohemaida at gmail.com (Bo)
Date: Mon, 06 Aug 2007 15:22:05 -0700
Subject: step through .py file in a .NET application written in C# in Visual
	Studio
Message-ID: <1186438925.541501.235800@g4g2000hsf.googlegroups.com>

Hello All,

I am experimenting IronPython in Visual Studio.  Here is what I have,
what I did and what I want

1.  I have installed Visual Studio SDK 4.0 according to this blog
http://blogs.msdn.com/aaronmar/archive/2006/02/16/a-bit-more-on-ironpython.aspx

If I run Visual Studio under Experimental Hive, a Python file opened
is color coded.

2.  Also, my computer has apparently installed some IronPython DLL
because my Visual Studio can recoginize the following class:
IronPython.Hosting.PythonEngine.

If I declare something like the following in Visual Studio:

public static class MyPythonClass {
   private static IronPython.Hosting.PythonEngine   MY_ENGINE;
  //suppose I have created an instance of PhythonEngine and assigned
to MY_ENGINE
   ............
}

If I do "Go to Definition" of PythonEngine, I can navigate to the
Definition of PythonEngine, but it is from MetaData.

3.  In my .NET application (written in C#) , I can invoke the
execution of an external python file using something like:
MyPythonClass.MY_ENGINE.ExecuteFile("myPythonFileWithAbsolutePath.py")

The python file (myPythonFileWithAbsolutePath.py) can be executed all
right, but I want to step through it to debug it.  Any suggestions on
how to do it?

Thanks a bunch.

Bo



From bj_666 at gmx.net  Wed Aug 22 03:47:32 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 Aug 2007 07:47:32 GMT
Subject: File Read Cache - How to purge?
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
	<87veb9xb7y.fsf@mulj.homelinux.net>
	<slrnfcm1hv.4r1.nick@irishsea.home.craig-wood.com>
	<87ir781afk.fsf@mulj.homelinux.net>
Message-ID: <5j280kF3sh73oU2@mid.uni-berlin.de>

On Wed, 22 Aug 2007 06:05:03 +0200, Hrvoje Niksic wrote:

> Nick Craig-Wood <nick at craig-wood.com> writes:
> 
>> If you are running linux > 2.6.18 then you can use
>> /proc/sys/vm/drop_caches for exactly that purpose.
>>
>>   http://www.linuxinsight.com/proc_sys_vm_drop_caches.html
> 
> That URL claims that you need to run "sync" before dropping the cache,
> and so do other resources.  I wonder if that means that dropping the
> cache is unsafe on a running system.

Of course not.  It means that dirty pages are not dropped, so if you
really want to invalidate as much cache memory as possible you have to
``sync`` before.

Ciao,
	Marc 'BlackJack' Rintsch


From vedrandekovic at v-programs.com  Thu Aug 16 15:29:51 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Thu, 16 Aug 2007 12:29:51 -0700
Subject: wxpython log redirect
Message-ID: <1187292591.151231.41440@b79g2000hse.googlegroups.com>

Hello,

Why this wx example don't return \nHELLO WORLD and other text in same
window:


import wx
import logging
import sys

def nekaj():
    print "\nHELLO WORLD"

class WxLog(logging.Handler):
    def __init__(self, ctrl):
        logging.Handler.__init__(self)
        self.ctrl = ctrl
    def emit(self, record):
        self.ctrl.AppendText(self.format(record)+"\n")



class MainFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="logging test")
        sizer = wx.BoxSizer(wx.VERTICAL)

        log = wx.TextCtrl(self, style=wx.TE_MULTILINE)

        rootLogger = logging.getLogger('')
        rootLogger.setLevel(logging.DEBUG)
        hdlr = WxLog(log)
        hdlr.setFormatter(logging.Formatter('%(levelname)s | %(name)s |
%(message)s [@ %(asctime)s in %(filename)s:%(lineno)d]'))
        rootLogger.addHandler(hdlr)
        rootLogger.debug(str(sys.stdout))
        nekaj()  # goes to the function nekaj

if __name__ =="__main__":
    app = wx.App(0)
    frame = MainFrame()
    frame.Show()
    app.MainLoop()


Regards,
Vedran



From istvan.albert at gmail.com  Wed Aug 29 09:08:32 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Wed, 29 Aug 2007 13:08:32 -0000
Subject: Haskell like (c:cs) syntax
In-Reply-To: <mailman.99.1188389544.28954.python-list@python.org>
References: <fb25uh$gl9$1@online.de>
	<mailman.85.1188339894.28954.python-list@python.org>
	<rAbBi.13285$fb.8669@tornado.fastwebnet.it>
	<mailman.99.1188389544.28954.python-list@python.org>
Message-ID: <1188392912.357697.192080@w3g2000hsg.googlegroups.com>

On Aug 29, 8:12 am, Ricardo Ar?oz <ricar... at gmail.com> wrote:

> >> Caution : L[0] and L[1:] are COPIES of the head and tail of the list.

> Sorry, should have written RETURN copies instead of ARE copies.

L[0] does not return a copy, it does what is says, returns the object
stored at index 0.

i.



From steve at holdenweb.com  Mon Aug  6 23:52:43 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Aug 2007 23:52:43 -0400
Subject: All leading tabs or all leading spaces - why isn't that enforced?
In-Reply-To: <y8Rti.1088$3x.121@newssvr25.news.prodigy.net>
References: <y8Rti.1088$3x.121@newssvr25.news.prodigy.net>
Message-ID: <f98qa9$n9v$2@sea.gmane.org>

John Nagle wrote:
>    One can argue over tab vs. space indentation, but mixing the two
> is just wrong.  Why not have CPython report an error if a file has
> both leading tabs and leading spaces?  I know that was proposed at
> some point, but I don't think it ever went in. That would catch a
> common error introduced during maintenance.
> 
I suppose we Pythonistas are just too permissive for our own good. 
Consider the opportunity to use mixed tabs and spaces a piece of rope of 
your preferred length ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From cai.haibin at gmail.com  Wed Aug 22 01:41:10 2007
From: cai.haibin at gmail.com (james_027)
Date: Wed, 22 Aug 2007 05:41:10 -0000
Subject: for statement on empty iterable
In-Reply-To: <7xabsk3zgm.fsf@ruckus.brouhaha.com>
References: <1187760507.951994.50310@q4g2000prc.googlegroups.com>
	<7xabsk3zgm.fsf@ruckus.brouhaha.com>
Message-ID: <1187761270.713307.224570@i38g2000prf.googlegroups.com>

hi Paul,

>
> That doesn't crash or anything like that, but it also doesn't
> set the index variable, which can cause confusion in some situations.

Thanks for your quick answer ... Actually I was thinking how do I
access the index inside a for statement? Can you help

Thanks
james




From uymqlp502 at sneakemail.com  Wed Aug 29 19:41:27 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Wed, 29 Aug 2007 16:41:27 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <mailman.120.1188423362.28954.python-list@python.org>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
Message-ID: <1188430887.481586.106760@l22g2000prc.googlegroups.com>


> But it's always a good idea to make your software "correct and as
> reliable as possible", isn't it? The problem is the external constraints
> on the project. As the old saying goes: "Cheap, fast, reliable: choose
> any two".

If you are suggesting that "programming by contract" is not
appropriate for every application, you will get no argument from me.
All I am suggesting is that having the option to use it when you need
it is very desirable, and it can possibly enhance the versatility of
Python by making Python more suitable for *some* mission-critical
applications.

I once read a book on something called SPARK Ada, which also supports
programming by contract. I was pleasantly surprised to discover
yesterday that support for the such methods is also available for
Python. However, the support would obviously be a bit stronger if it
were in the core Python distribution.

What I really like about the implementation I cited above is that the
invariants and the pre and post-conditions can all be put right in the
doc string at the beginning of each class or function. You can think
of it as a detailed specification of the intent (or of some of the
requirements or constraints) of the class or function -- which can be
*automatically* checked during testing. It can also be used for
explicit type checking.

It's like having some of your most critical unit tests built right
into your code. It may make your code very verbose, but it will also
be very complete.





From DouhetSukd at gmail.com  Fri Aug 17 16:32:58 2007
From: DouhetSukd at gmail.com (DouhetSukd at gmail.com)
Date: Fri, 17 Aug 2007 13:32:58 -0700
Subject: help on object programing
In-Reply-To: <1187370429.041002.205500@d55g2000hsg.googlegroups.com>
References: <1187370429.041002.205500@d55g2000hsg.googlegroups.com>
Message-ID: <1187382778.865479.180280@r23g2000prd.googlegroups.com>


> how can i define my variables so that there are valid outside the
> class???

Not to be obnoxious, but your sample code has a number of fairly big
conceptual issues (like subclassing self and assigning 32 at the big
class level and printing 'list' which is a built-in type).  Been there
myself - it took me a while to understand class vs. instance
variables.  You are also using fairly advanced techniques such as
embedded classes which look above a newbie level.

I took the liberty to comment and "fix" up your code a bit so that it
runs:

#classes either inherit or not and signify that in parenthesis.
inheriting 'self' makes no sense
#for a class declaration.  but it does make perfect sense to have
'self' as a param to a class method (def)

class big:

    #class-level variable
    x = 32

    #changed to mylist to avoid confusion with list built-in.
    mylist = []

    #this is a normal instance method - 'self' refers to the class
instance you just created.
    def inside (self):

        #is this really what you wanted?  an embedded class -
syntaxically correct, but not used often
        class small: # a new class defined inside the first

            y = 348
            #ok, now I am referring to the mylist variable associated
(bound in python-speak) to the big class.
            #y is defined here so no need to do anything
            big.mylist.append(y) # send the value to first list
            #same with big.x
            big.mylist.append(big.x)


#instantiate the class, because you are calling an instance method
(i.e. you need to have created an instance to use that method)
#call the call
mybig = big().inside()

#refer to the mylist variable declared at the class, not instance
level.
#class level means any other calls you make will alter that variable
print 'my class level mylist variable:',big.mylist

console output:

my class level mylist variable: [348, 32]

Can you perhaps rephrase your requirements to indicate what you want
to achieve?

Strictly speaking, it looks like you could do this:

class Big:
    def getlist(self):
       return [348,32]

mylist =Big().getlist()

That's probably not what you were asking for, but it does express the
results you would get out of your code, especially as you are not
passing in any significant parameters to the 'inside' function.

OK, perhaps a bit more useful.

#no inheritance - could also be class Big(object) where object is the
python "root class"
class Big:

   #initialize the class level to be empty
   myclasslist = []
   def __init__(self):
      #initialize the instance level variable to be empty
      self.myinstancelist = []

   def appendAndGet(self,x,y):
      #modify the instance's "personal" list
      self.myinstancelist.append(x)
      self.myinstancelist.append(y)
      #will now modify shared class-level variable.
      Big.myclasslist.append(x)
      Big.myclasslist.append(y)
      return self.myinstancelist


print "Big.myclasslist without any instances around:", Big.myclasslist


bigA = Big()
result = bigA.appendAndGet(348,32)
print "result #1:", result
print "Big.myclasslist:", Big.myclasslist

bigB = Big()
result = bigB.appendAndGet(11,22)
print "result #2:", result

#and the instance also still has its myinstancelist around
print "same as result #2:", bigB.myinstancelist

print "Big.myclasslist:", Big.myclasslist

console output:

D:\user\workspace\vg\tmptesting>testc.py
my class level mylist variable: [348, 32]
Big.myclasslist without any instances around: []
result #1: [348, 32]
Big.myclasslist: [348, 32]
result #2: [11, 22]
same as result #2: [11, 22]
Big.myclasslist: [348, 32, 11, 22]

Try perhaps Dive Into Python's class intro:

www.diveintopython.org/object_oriented_framework/defining_classes.html

Cheers




From wildemar at freakmail.de  Fri Aug 24 16:45:58 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Fri, 24 Aug 2007 22:45:58 +0200
Subject: Co-developers wanted: document markup language
In-Reply-To: <fand89$isa$1@sea.gmane.org>
References: <87odgyyx9u.fsf@wilson.homeunix.com>	<fakrtb$2ts$1@panix3.panix.com>	<87tzqpew22.fsf@wilson.homeunix.com>	<fal3cv$bi2$1@panix3.panix.com>	<87tzqp77my.fsf@wilson.homeunix.com>	<7xy7g1if24.fsf@ruckus.brouhaha.com>	<87mywh717i.fsf@wilson.homeunix.com>	<46CEAF71.3050900@freakmail.de>
	<fand89$isa$1@sea.gmane.org>
Message-ID: <46CF4386.9020801@freakmail.de>

Robert Kern wrote:
> Wildemar Wildenburger wrote:
>   
>> Torsten Bronger wrote:
>>     
>>> Hall?chen!
>>>   
>>>       
>> Yes, you're German. Have you ever noticed that (we) Germans are 
>> virtually the only ones that feel the need to rub our nationality into 
>> everyones faces? ;)
>>     
>
> Howdy!
>
> We Americans do the same.  ;-)
>
>   
Weeell, you guys mostly rub your ignorance about the rest of the world 
into everyones faces. That's a little different.

There, I did it. Now I got my country invaded. But maybe that's a good 
thing ... at least we will get democracy and finally find happiness.

/W
(OK, sorry. I couldn't resist. Don't take it personally. Take it 
nationally. ;) )


From pyth0nc0d3r at gmail.com  Fri Aug 24 13:01:25 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Fri, 24 Aug 2007 12:01:25 -0500
Subject: Fwd: How would I compile a Python file to a exe
In-Reply-To: <1187974585.362430.272470@m37g2000prh.googlegroups.com>
References: <eb79828c0708231355o72f9b200g74036aca19f1806c@mail.gmail.com>
	<mailman.206.1187903515.32294.python-list@python.org>
	<1187974585.362430.272470@m37g2000prh.googlegroups.com>
Message-ID: <eb79828c0708241001s6a2acf9dxe55d23baf88df613@mail.gmail.com>

I thought I answered this lol..

---------- Forwarded message ----------
From: vasudevram <vasudevram at gmail.com>
Date: Aug 24, 2007 11:56 AM
Subject: Re: How would I compile a Python file to a exe
To: python-list at python.org

On Aug 24, 2:11 am, Charlie <li... at liquidtrust.org> wrote:
> Quoting Lamonte Harris <pyth0nc0... at gmail.com>:
>
> > Been a while and I'm wondering how I would go about doing it.
>
> py2exe seems to be a fairly good option for this, at least in the
> world of Windows.

Yes, py2exe looks good. I've tried it out. Make sure to test for the
cases you'll need, though.

- Vasudev
-----------------------------------------
Vasudev Ram
http://www.dancingbison.com
http://jugad.livejournal.com
http://sourceforge.net/projects/xtopdf
-----------------------------------------

--
http://mail.python.org/mailman/listinfo/python-list
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From gagsl-py2 at yahoo.com.ar  Mon Aug 27 00:12:27 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 27 Aug 2007 01:12:27 -0300
Subject: how to remove number
References: <mailman.205.1187683205.32293.python-list@python.org>
	<763139.69891.qm@web63115.mail.re1.yahoo.com>
Message-ID: <op.txo9y1g0x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 21 Aug 2007 06:18:26 -0300, susanti marsol <santi_anti at yahoo.com>  
escribi?:

> how to remove all number in our's document?

Can you be more specific?

-- 
Gabriel Genellina



From dejanews at email.com  Sun Aug 19 08:03:39 2007
From: dejanews at email.com (samwyse)
Date: Sun, 19 Aug 2007 12:03:39 GMT
Subject: clarification
In-Reply-To: <1i31aop.2ing3h1hcfz0dN%aleax@mac.com>
References: <aa405c1f0708162332t7b6dbdd6o2cc0f512dc821d7b@mail.gmail.com>
	<mailman.2107.1187350363.22759.python-list@python.org>
	<fa41k8$10n$1@news2.u-psud.fr> <13cb7frnqs8f6d9@corp.supernews.com>
	<CSsxi.28081$RX.11328@newssvr11.news.prodigy.net>
	<CTDxi.6299$4w7.2405@newssvr22.news.prodigy.net>
	<1i31aop.2ing3h1hcfz0dN%aleax@mac.com>
Message-ID: <vkWxi.28393$RX.16912@newssvr11.news.prodigy.net>

Alex Martelli wrote:

> Of course, hoisting the unbound method out of the loops can afford the
> usual small optimization.  But my point is that, in Python, these
> operations (like, say, the concatenation of a sequence of lists, etc)
> are best performed "in place" via loops calling mutator methods such as
> update and intersection_update (or a list's extend, etc), rather than
> "functionally" (building and tossing away many intermediate results).
> E.g., consider:
> 
> brain:~ alex$ python -mtimeit -s'sos=[set(range(x,x+4)) for x in
> range(0, 100, 3)]' 'r=set()' 'for x in sos: r.update(x)'
> 100000 loops, best of 3: 18.8 usec per loop
> 
> brain:~ alex$ python -mtimeit -s'sos=[set(range(x,x+4)) for x in
> range(0, 100, 3)]' 'r=reduce(set.union, sos, set())'    
> 10000 loops, best of 3: 87.2 usec per loop
> 
> Even in a case as tiny as this one, "reduce" is taking over 4 times
> longer than the loop with the in-place mutator -- and it only gets
> worse, as we're talking about O(N squared) vs O(N) performance!  Indeed,
> this is part of what makes reduce an "attractive nuisance"...;-).  [[And
> so is sum, if used OTHERWISE than for the documented purpose, computing
> "the sum of a sequence of numbers": a loop with r.extend is similarly
> faster, to concatenate a sequence of lists, when compared to sum(sol,
> [])...!!!]]

Curiously, when I attempt the actual problem at hand (set intersection) 
rather than something altogether different (set union) on my Dell laptop 
running Win2K Pro, I get the following results:

stmt = 'r=reduce(set.intersection, los)'
best of 3: 21.9 usec per loop
stmt = 'r=intersect_all(los)'
best of 3: 29.3 usec per loop

So, the "nuisance" is more attractive than you thought.  Apparently, one 
can't really depend on "in place" mutator methods being more efficient 
that using functional techniques.  BTW, the above figures reflect 10,000 
iterations; using larger counts makes the difference even larger.  I 
suspect that this is because the Python interpreter has fewer chances to 
be interrupted by external processes when it's using 'reduce'.  This in 
turn indicates that both implementations actually work about same and 
your "O(n squared)" argument is irrelevant.

P.S. Here's the source I used for the timings:

from timeit import Timer

setup = """
def intersect_all(los):
     it = iter(los)
     result = set(it.next())
     for s in it: result.intersection_update(s)
     return result

not7=range(2,11)
not7.remove(7)
los=[set(range(0,360,step)) for step in not7]
"""

number = 10000
repeat = 3
precision = 3

for stmt in 'r=reduce(set.intersection, los)', 'r=intersect_all(los)':
     t = Timer(stmt, setup)
     r = t.repeat(repeat, number)
     best = min(r)
     usec = best * 1e6 / number
     print "stmt =", repr(stmt)
     print "best of %d: %.*g usec per loop" % (repeat, precision, usec)


From rvtol+news at isolution.nl  Sat Aug 11 11:37:36 2007
From: rvtol+news at isolution.nl (Dr.Ruud)
Date: Sat, 11 Aug 2007 17:37:36 +0200
Subject: I am giving up perl because of assholes on clpm -- switching to
	Python
References: <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d@giganews.com>
	<techa3pi8ekksd2fioe4j72gadfc9omhmh@4ax.com>
	<1185467914.814174.94600@22g2000hsm.googlegroups.com>
Message-ID: <f9ks7k.1ko.1@news.isolution.nl>

Paul Boddie schreef:

> let us
> avoid comp.lang.python becoming some kind of linux-kernel ego trip
> where anyone who has stuck around has an interest in perpetuating a
> hostile atmosphere.

"When did you stop beating your wife?" 

-- 
Affijn, Ruud

"Gewoon is een tijger."


From fabioztessitore at libero.it  Sat Aug  4 13:51:21 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 04 Aug 2007 17:51:21 GMT
Subject: regexp problem in Python
References: <1186177312.117581.129910@d55g2000hsg.googlegroups.com>
Message-ID: <46b4bc99$0$36444$4fafbaef@reader5.news.tin.it>

Il Fri, 03 Aug 2007 14:41:52 -0700, Ehsan ha scritto:

maybe you can use this to solve your prob:

myurl = "http://www.2shared.com/download/1716611/e2000f22/
Jadeed_Mlak14.wmv?tsid=20070803-164051-9d637d11"

if myurl.startswith('http') and ('wmv' in myurl or '3pg' in myurl):
	# myurl is the complete address you want
	print myurl

#####################################

about re, I'm waiting for someone enlightening all us,
bye
Fabio


From jcd at sdf.lonestar.org  Fri Aug 24 13:24:07 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 24 Aug 2007 13:24:07 -0400
Subject: Using Regular Expresions to change .htm to .php in files
In-Reply-To: <9afea2ac0708231305v539390dew84926f0b0dcd6974@mail.gmail.com>
References: <B81995429.43.65370.1@mxextra>
	<9afea2ac0708231305v539390dew84926f0b0dcd6974@mail.gmail.com>
Message-ID: <46CF1437.9020200@sdf.lonestar.org>

Tim Williams wrote:
> On 23/08/07, sebzzz at gmail.com <sebzzz at gmail.com> wrote:
>   
>> Hi,
>>
>> I have a bunch of files that have changed from standard htm files to
>> php files but all the links inside the site are now broken because
>> they point to the .htm files while they are now .php files.
>>
>> Does anyone have an idea about how to do a simple script that changes
>> each .htm in a given file to a .php
>>
>> Thanks a lot in advance
>>
>>     
>
> Something like:
>
> Infile = open(f_name,'r+')
> Data =  Infile.read()
> InFile.write(Data.replace('.htm','.php'))
> Infile.close()
>
> :)
>   
Yeah, but you'd better make darn sure that *all* links point to .htm 
files (including external links), because you could very easily end up 
pointing to http://some.othersite.com/index.phpl

And that's just no good.

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From steve at holdenweb.com  Thu Aug 23 23:48:42 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 23 Aug 2007 23:48:42 -0400
Subject: Xah's Edu Corner: Under the spell of Leibniz's dream
In-Reply-To: <1187908258.609624.321990@m37g2000prh.googlegroups.com>
References: <1187567809.896668.228650@z24g2000prh.googlegroups.com>	<1187598193.118227.270460@19g2000hsx.googlegroups.com>	<46ca1e65$1_3@news.chariot.net.au>
	<5j4rrfF3s3h2rU1@mid.dfncis.de>
	<1187908258.609624.321990@m37g2000prh.googlegroups.com>
Message-ID: <falkf0$17m$1@sea.gmane.org>

Twisted wrote:
> On Aug 23, 3:38 am, Matthias Buelow <m... at incubus.de> wrote:
>> In comp.lang.lisp Bikal KC <nepbabucxspamf... at yahoo.ca> wrote:
>>
>>> I used usenet years ago then stopped for couple of years. I remember
>>> seeing him/her on c.l.perl I believe doing the same thing he/she is
>>> doing atm. I'd say the ultimate usenet superstar. Wow!
>> I think it's some (probably mild) form of autism.
>> No offense intended, Xah.
> 
> Yeah, yeah, that's what they all say, especially when they do that
> most-common of usenet things -- insult your mental health and tone it
> as if it were a very compassionate and understanding suggestion to
> seek medical treatment rather than the flame that it is. :P
> 
It's already well-established that there's no point flaming Xah Lee, as 
he's pretty much an output-only source. See any responses from him on 
this thread?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From mclaugb at nospm.yahoo.com  Tue Aug  7 10:48:35 2007
From: mclaugb at nospm.yahoo.com (mclaugb)
Date: Tue, 7 Aug 2007 15:48:35 +0100
Subject: python system subprocess win32
Message-ID: <f9a0on$dee$1@gemini.csx.cam.ac.uk>

Hello ALl,
I have a compiled program "conv.exe" that works as follows:
>>conv.exe
-----------------------------
Please selection from the following options.  press "h" for help, "p" for 
print, "r" for readfile.
Enter your request now:
...
--------------------
Is there a way to script python using the subprocess method to start this 
program "conv.exe" and then send a "r" to the command line to make it, say, 
readfile.

I have tried the following but the .communicate("r) is not doing anything

import subprocess
import time

a=subprocess.Popen("c:\\mcml\\conv.exe")
time.sleep(1)
(stdout, stderr) = a.communicate("r")

Many thanks,
Bryan




From bill.scherer at verizonwireless.com  Wed Aug  8 09:53:17 2007
From: bill.scherer at verizonwireless.com (Bill Scherer)
Date: Wed, 08 Aug 2007 09:53:17 -0400
Subject: This bit of code hangs Python Indefinitely
In-Reply-To: <NYOBGCEXSMTP21yT3400005025f@nyobgcexsmtp21.uswin.ad.vzwcorp.com>
References: <NYOBGCEXSMTP21yT3400005025f@nyobgcexsmtp21.uswin.ad.vzwcorp.com>
Message-ID: <46B9CACD.7030308@verizonwireless.com>

brad wrote:
> url_queue = Queue.Queue(256)
> for subnet in subnets:
>      url_queue.put(subnet)
>
> The problem is that I have 512 things to add to the queue, but my limit 
> is half that... whoops. Shouldn't the interpreter tell me that I'm an 
> idiot for trying to do this instead of just hanging? A message such as 
> this would be more appropriate:
>
> "Hey fool, you told me to only accept 256 things and you're trying to 
> give me 512... what's up with that?"
>   
If you used put_nowait(subnet), or put(subnet, False), then you would
get an error. By default, put() will block when the specified limit is
reached. When the queue is no longer full, the put will proceed. See the
Queue module docs for complete info.

HTH,

Bill
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From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Aug 16 05:23:22 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 16 Aug 2007 11:23:22 +0200
Subject: Changing button preferences after beeing pressed
References: <1187252874.903820.79280@a39g2000hsc.googlegroups.com>
Message-ID: <5iijcaF3or1vmU1@mid.individual.net>

 thomas.lidebrandt at gmail.com wrote:
> I'm using wxPython to consruct a GUI and want to change a button
> label 

=> wx.Button.SetLabel (also have a look at the button examples)

> and event handler to change after the button have been 
> pressed. 

I'm not sure if those bindings can easily be changed at runtime.
Another solution is creating two buttons and only show one at a
time.

> The only thing I can think of is a global variable that 
> contrls the state of the program and constructs the button in
> accordance to the defined state. 

Better keep the state as frame attribute and use a frame method to
change it.

Regards,


Bj?rn

-- 
BOFH excuse #61:

not approved by the FCC



From zentraders at gmail.com  Mon Aug 13 22:27:15 2007
From: zentraders at gmail.com (Zentrader)
Date: Mon, 13 Aug 2007 19:27:15 -0700
Subject: output object fields into a file
In-Reply-To: <1187054257.243592.35360@o61g2000hsh.googlegroups.com>
References: <1187054257.243592.35360@o61g2000hsh.googlegroups.com>
Message-ID: <1187058435.276794.44700@i13g2000prf.googlegroups.com>

On Aug 13, 6:17 pm, Alex <llu... at gmail.com> wrote:
> Hello,  I am rather new to python.  Maybe my thinking is in the
> paradigm of C++, that makes me hard to make sense of some python
> scripts (interacting with C# code) written by my colleague.  I am
> thinking of outputting all objects and their fields of each script
> into a file.  The tricky part is I am NOT quite sure of the type of
> the fields.  How can I output these objects and their fields into an
> external file.  Any code sample would be highly appreciated !!!
>
> Alex

For now, assume that everything must be written as a string.  You can
use write or writelines depending on the type.
http://www.penzilla.net/tutorials/python/fileio/
http://docs.python.org/lib/bltin-file-objects.html



From arkanes at gmail.com  Tue Aug 21 09:24:45 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 21 Aug 2007 08:24:45 -0500
Subject: C# and Python
In-Reply-To: <1187699710.839869.32810@57g2000hsv.googlegroups.com>
References: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
	<1187699710.839869.32810@57g2000hsv.googlegroups.com>
Message-ID: <4866bea60708210624l610bd441l45f66eacb9d304ac@mail.gmail.com>

On 8/21/07, Ant <antroy at gmail.com> wrote:
> On Aug 21, 11:01 am, subeen <tamim.shahr... at gmail.com> wrote:
> > Hi,
> ...
> > But I want to write the GUI and number generation program in C#.net.
> > When the user clicks Quick Sort button, the quicksort.py will be
> > called and it will sort the numbers.
>
> Probably worth looking at IronPython, the Python implementation for
> the .Net platform.
>
> --

Also Pythonnet (see the recent announce on this ML), which is a
.NET/CPython bridge and supports embedding CPython as well as calling
.NET code from CPython.


From jstroud at mbi.ucla.edu  Mon Aug 20 20:46:37 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 20 Aug 2007 17:46:37 -0700
Subject: Newbee Question
In-Reply-To: <1187650036.450645.185500@a39g2000hsc.googlegroups.com>
References: <mailman.15.1187620149.26576.python-list@python.org>
	<1187621470.484615.7010@i13g2000prf.googlegroups.com>
	<mailman.19.1187621934.26576.python-list@python.org>
	<1187622390.854759.162320@q3g2000prf.googlegroups.com>
	<1187650036.450645.185500@a39g2000hsc.googlegroups.com>
Message-ID: <fadcld$1c7$1@zinnia.noc.ucla.edu>

hd1956 at yahoo.com wrote:
> On Aug 20, 11:06 am, kyoso... at gmail.com wrote:
> 
>>On Aug 20, 9:58 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
>>
>>
>>
>>
>>
>>
>>>On 8/20/07, kyoso... at gmail.com <kyoso... at gmail.com> wrote:
>>
>>>>On Aug 20, 9:23 am, "HD1956" <hd7... at hotmail.com> wrote:
>>>>
>>>>>This is probably a simple code. I am a truck driver who gets paid by
>>>>>stops and cases. I am trying to figure out how to code my stop pay. I
>>>>>get 40 cents per stop up to 22 stops, and $1.40 per stops after that.
>>
>>>>def calc(num):
>>>>        if num < 23:
>>>>                return 0.4 * num
>>>>        else:
>>>>                overtime = num - 22
>>>>                x = 0.4 * 22
>>>>                x += overtime * 1.4
>>>>                return x
>>
>>>># Use your own brain next time
>>
>>>>Mike
>>
>>>>--
>>>>http://mail.python.org/mailman/listinfo/python-list
>>
>>>Mike,
>>
>>>I wonder if we were both just duped into helping someone with their homework...
>>
>>>Shawn
>>
>>I like to write code, so it's not a big deal when it's something so
>>simple. Still, that is beyond dumb! Nice code, by the way.
>>
>>Mike- Hide quoted text -
>>
>>- Show quoted text -
> 
> 
> Thanks for the help. By the way I am trying to learn the python after
> work and on weekends. If it was a dumb question, to this group, I will
> not bother you all again.
> Without help it will take me longer to learn. Thanks
> 

Throw out an example of what you tried with an error message and/or 
unexpected results. Ask particulars--this will keep you from giving 
truck drivers a bad name.

Sticking-my-fist-out-window-and-making-pulling-down-gesture-ly yours,

James



-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Aug 15 05:11:59 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 15 Aug 2007 11:11:59 +0200
Subject: What does r"""any text""" mean ?
References: <f9ucmj$ja2$1@online.de>
Message-ID: <5ifuasF3foe9rU1@mid.individual.net>

Alexander Eisenhuth wrote:

> ... as you can find in os.py at line 1 ?

Please don't split your request between subject and body.

String literals enclosed in triple quotes are multiline strings.
String literals prefixed by "r" are raw strings.

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

Regards,


Bj?rn

-- 
BOFH excuse #71:

The file system is full of it



From jjl at pobox.com  Sun Aug  5 19:09:13 2007
From: jjl at pobox.com (John J. Lee)
Date: Sun, 05 Aug 2007 23:09:13 GMT
Subject: Misleading wikipedia article on Python 3?
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
Message-ID: <87y7gpr33a.fsf@pobox.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:
[... snip stuff I don't follow ...]
> However, it *is* a design goal to make 2.6 so that transition to
> 3k becomes simpler. That's not a 3k feature, but a 2.6 one.

Not sure I care about this sort of thing for the purpses of my
question.  I just wanted to know: is it easy to make my code so it
runs on 2.6 and 3.0, without funny stuff like a code translator?
Seems wikipedia said "yes" and Guido said "no".


[...]
> to be seen. I personally believe that many projects won't need the 2to3
> tool, if they are willing to compromise on the notations used in the
> source code.

OK, so there's disagreement on this point amongst the Python 3
developers.  That's interesting (I don't mean that in a negative way).


[...]
>> It
>> seems to me that if I don't understand what the Python 3 developers
>> expect the practicalities to be, most other interested people won't
>> either ("interested" in the opposite sense to "disinterested" rather
>> than to "uninterested").
>
> I think comp.lang.python is then the wrong place to find out; the py3k
> list likely reaches more of these developers. OTOH, I don't know whether
> they all want to participate in a survey of their expectations...

I was also hoping to get a quick answer rather than a long discussion,
if any Python 3 developers were around to talk to the broader range of
people that read this list.  You have given your answers, I wonder if
anybody else will turn up.


> Rather than studying people's opinions, why don't you try to port your
> own projects to 3k, and report whether you found it practical to use
> a single source (assuming you would prefer such a solution for your
> own project)?

Because that might well tell me much less than asking a Python 3
developer, and yet take far more time, and fail to inform everybody
else.


John


From Frank.Aune at broadpark.no  Thu Aug 23 09:58:50 2007
From: Frank.Aune at broadpark.no (Frank Aune)
Date: Thu, 23 Aug 2007 15:58:50 +0200
Subject: Python submodules and name imports
Message-ID: <200708231558.50501.Frank.Aune@broadpark.no>

Hi,

First take a look at:

http://www.network-theory.co.uk/docs/pytut/Packages.html

as I will use this module file layout as an example.

If I want to do the following:

from Sound import Effects
...
Effects.echo.echofilte(bla bla)

What will Sound/Effects/__init__.py need to contain then? I tried to define 
the __all__ = ['echo','surround','reverse']  parameter in the init file, but 
this only seems to be effective for " .. import *" statements.

Is the correct way of accomplishing this to explicitly import the submodules 
in sound/Effects/__init__.py? I'm looking for the "official" way of doing 
this.

Thank you,
Frank Aune


From half.italian at gmail.com  Wed Aug 15 23:08:30 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: Wed, 15 Aug 2007 20:08:30 -0700
Subject: moving files in a seperate thread (and/or with progress?)
In-Reply-To: <mailman.1999.1187170117.22759.python-list@python.org>
References: <mailman.1999.1187170117.22759.python-list@python.org>
Message-ID: <1187233710.262456.67700@q3g2000prf.googlegroups.com>

On Aug 15, 2:28 am, "Jorgen Bodde" <jorgen.maill... at gmail.com> wrote:
> Hi all,
>
> I want to make a small batch copy tool that scans for certain files,
> and copies them to a specified directory. Since the files are huge
> (AVI / DIVX) typical 300 to 700 Mb, I want to provide the user with
> some feedback during the file copy.
>
> Here is my dillemma; When I use shutil.move(..,..) I have to wait
> until it's done, there is no feedback, so the GUI basically hangs.
> However, shutil.move can be fast because it intelligently renames the
> file when it is on the same medium, but slow when it moves to a
> different one.
> When I use my own implementation of a move mechanism that provides
> feedback, I lose that intelligence, and I might slow down the copy
> process unneccessarily.
>
> When I move files, feedback is handy to have, but not neccesary so I
> thought I can also call shutil.move from a seperate thread so the main
> GUI stays responsive. What are my options in aborting a move by
> killing the thread or are there other (3rdparty) modules I might use
> to get better move or copy performances?
>
> Just opening the file, performing a block copy myself seems like it
> will slow down the transfer, but up until now I found no way to move
> or copy with progress or abilities to abort the file transfer..
>
> Any ideas?
>
> Regards,
> - Jorgen

The following link helped me to pull it off with Tkinter.  A
complicated example, but very well written.

http://uucode.com/texts/pylongopgui/pyguiapp.html

~Sean



From nospam at geniegate.com  Thu Aug  2 09:09:26 2007
From: nospam at geniegate.com (Jamie)
Date: Thu, 02 Aug 2007 13:09:26 GMT
Subject: I am giving up perl because of assholes on clpm -- switching to
	Python
References: <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d@giganews.com>
Message-ID: <Lc1186058698244350x8ae3b4c@earth.podro.com>

In <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d at giganews.com>,
Martha_Jones at tx.net mentions:
>Python is a better language, with php support, anyway, but I am fed up
>with attitudes of comp.lang.perl.misc. Assholes in this newsgroup ruin
>Perl experience for everyone. Instead of being helpful, snide remarks,
>back-biting, scare tactings, and so on proliferate and self
>reinforce. All honest people have left this sad newsgroup. Buy bye,
>assholes, I am not going to miss you!!!
>
>Martha

I've heard people tell the same story, that perl folks are... rude.

Actually, I've pretty much heard (and noticed) that about linux, too.

Yet, linux is still a good operating environment, so is perl.

You'll find rude people everywhere you look. While it may be true that
there is a higher percentage of hard-core tech folks who might lack
social skills, at least they don't err.. well, maybe they do.. byte. :-)

Seriously, it is one of the problems facing perl (and linux) people ARE
turned away by the attitude. It is rather embarassing/unflattering when
someone is critical of your work.

I see a lot of ideas about things should be "made easier" but I think 
thats the wrong course. We really just need to be nicer to new folks.

Jamie
-- 
http://www.geniegate.com                    Custom web programming
Perl * Java * UNIX                        User Management Solutions


From almadhu at gmail.com  Sun Aug 12 00:46:44 2007
From: almadhu at gmail.com (Madhu Alagu)
Date: Sun, 12 Aug 2007 04:46:44 -0000
Subject: python + XUL
Message-ID: <1186894004.913359.132000@b79g2000hse.googlegroups.com>

Hi



Python + XUL Success Stories




Thanks

Madhu Alagu



From aleax at mac.com  Sat Aug 11 01:36:16 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 10 Aug 2007 22:36:16 -0700
Subject: Destruction of generator objects
References: <20070808002852.6228ae91@cube.tz.axivion.com>
	<1186618661.845525.225010@x35g2000prf.googlegroups.com>
	<20070809082517.6af28eaf@cube.tz.axivion.com>
Message-ID: <1i2ni7t.1npenokfe2krjN%aleax@mac.com>

Stefan Bellon <sbellon at sbellon.de> wrote:

> On Thu, 09 Aug, Graham Dumpleton wrote:
> 
> >     result = application(environ, start_response)
> >     try:
> >         for data in result:
> >             if data:    # don't send headers until body appears
> >                 write(data)
> >         if not headers_sent:
> >             write('')   # send headers now if body was empty
> >     finally:
> >         if hasattr(result,'close'):
> >             result.close()
> 
> Hm, not what I hoped for ...
> 
> Isn't it possible to add some __del__ method to the generator object
> via some decorator or somehow else in a way that works even with Python
> 2.4 and can then be nicely written without cluttering up the logic
> between consumer and producer?

No, you cannot do what you want in Python 2.4.  If you can't upgrade to
2.5 or better, whatever the reason may be, you will have to live with
2.4's limitations (there ARE reasons we keep making new releases, after
all...:-).


Alex


From paddy3118 at googlemail.com  Sun Aug 19 12:00:36 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sun, 19 Aug 2007 16:00:36 -0000
Subject: Hot subject: a good python editor and/or IDE?
In-Reply-To: <mailman.2162.1187525764.22759.python-list@python.org>
References: <mailman.2162.1187525764.22759.python-list@python.org>
Message-ID: <1187539236.091867.256290@w3g2000hsg.googlegroups.com>

On Aug 19, 10:47 am, S?bastien <seb.buch... at gmail.com> wrote:
> Hi folks,
>
> I am currently using Eclipse+PyDev when developping Python projects but
> I lack a fast, simple editor for tiny bit of scripts. So here is my
> question: what is, for you, the current best ( but still kind of light!
> ) Python editor/IDE ? A tiny precision, I am on Ubuntu so I am looking
> for a linux compatible editor.
>
> Cheers,
>
> S?bastien

A hard question to answer. Why not just use the default gnome or kde
editors?

I've invested time in learning vim which has paid off handsomely for
me.

- Paddy.



From steve at holdenweb.com  Wed Aug 22 07:07:23 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 22 Aug 2007 07:07:23 -0400
Subject: for statement on empty iterable
In-Reply-To: <1360b7230708212256l392155b9ua11d1113846b609e@mail.gmail.com>
References: <1187760507.951994.50310@q4g2000prc.googlegroups.com>	<7xabsk3zgm.fsf@ruckus.brouhaha.com>	<1187761270.713307.224570@i38g2000prf.googlegroups.com>
	<1360b7230708212256l392155b9ua11d1113846b609e@mail.gmail.com>
Message-ID: <fah5d5$i90$1@sea.gmane.org>

Amit Khemka wrote:
> On 8/22/07, james_027 <cai.haibin at gmail.com> wrote:
>> hi Paul,
>>
>>> That doesn't crash or anything like that, but it also doesn't
>>> set the index variable, which can cause confusion in some situations.
>> Thanks for your quick answer ... Actually I was thinking how do I
>> access the index inside a for statement? Can you help
> 
> Have a look at "enumerate", You can iterate over a list like:
> 
> for i,x in enumerate(['a', 'b', 'c']):
>     print i, x
> 
> It prints:
> 0 a
> 1 b
> 2 c
> 
Also remember that string are iterable:

 >>> for x in enumerate("James"):
...   print x
...
(0, 'J')
(1, 'a')
(2, 'm')
(3, 'e')
(4, 's')
 >>>

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From cpmishra.20 at gmail.com  Thu Aug  2 01:15:36 2007
From: cpmishra.20 at gmail.com (cpmishra)
Date: Thu, 02 Aug 2007 05:15:36 -0000
Subject: DBUtil with modepython
Message-ID: <1186031736.489064.287430@22g2000hsm.googlegroups.com>

Hi all
       I have used DBUtil in mysql databse. when we run to program in
dos command ,successfully run but when we run in apache server
(locally)with modepython then given error.Pls give me suggation

error:
No module named DBUtils.PooledDB



cp mishra



From omelnyk at gmail.com  Tue Aug 21 06:50:58 2007
From: omelnyk at gmail.com (Olexandr Melnyk)
Date: Tue, 21 Aug 2007 13:50:58 +0300
Subject: C# and Python
In-Reply-To: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
References: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
Message-ID: <d5f60f0c0708210350m43cd9c39h5507222041639bd7@mail.gmail.com>

Aside from method mentioned by Tom, you can invoke
your script through command line:

C:\Python24\bin\python.exe file-to-sort.txt result-file.txt

2007/8/21, subeen <tamim.shahriar at gmail.com>:
>
> Hi,
> I am a newcomer in Python.  I am going to write a small Python
> application that will run in windows xp. This application needs to
> have GUI. Is it possible to make a C# application using visual studio
> 2005 that will call the python scripts? Let me explain more here:
> My program will generate a text file of 100 - 100000 random integers,
> and sort those using various sorting methods. Now I have written
> separate sorting scripts in Python (quick sort, insertion sort etc.).
> But I want to write the GUI and number generation program in C#.net.
> When the user clicks Quick Sort button, the quicksort.py will be
> called and it will sort the numbers.
>
> regards,
> Subeen
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Sincerely yours,
Olexandr Melnyk
http://omelnyk.net/
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From antroy at gmail.com  Mon Aug 20 03:45:25 2007
From: antroy at gmail.com (Ant)
Date: Mon, 20 Aug 2007 00:45:25 -0700
Subject: Python question (PyNoob)
In-Reply-To: <3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d@bt.com>
References: <3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d@bt.com>
Message-ID: <1187595925.174671.286360@57g2000hsv.googlegroups.com>

On Aug 20, 1:33 am, Anonymous <no.re... at here.com> wrote:
...
> 1). Data Munging (text processing) - instead of Perl

Check out the re module (regexes) in the standard library, and the
pyparsing third party library: http://pyparsing.wikispaces.com/ for
more complex stuff.

> 2). Automating my build process

You'll want to look into the os, sys and subprocess modules. The PMOTW
this week was subprocess: http://www.oreillynet.com/onlamp/blog/2007/08/pymotw_subprocess_1.html.
A few weeks back it covered os: http://blog.doughellmann.com/2007/05/pymotw-os.html.
In fact one of Doug Hellmann's previous articles on the getopt module
may also be useful if you want your build scripts to be controlled by
command line args: http://blog.doughellmann.com/2007/08/pymotw-getopt.html
(Though I prefer optparse personally).

> 3). (Possibly) some web data retrieval jobs

urllib, urllib2 and cookielib in the standard library should do most
of what you want, perhaps with the addition of beautiful soup if you
need to scrape the pages for data: http://www.crummy.com/software/BeautifulSoup/

HTH.

--
Ant...

http://antroy.blogspot.com/




From deets at nospam.web.de  Thu Aug  2 15:18:21 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 02 Aug 2007 21:18:21 +0200
Subject: XML Processing
In-Reply-To: <1186080339.344993.167670@z24g2000prh.googlegroups.com>
References: <1186080339.344993.167670@z24g2000prh.googlegroups.com>
Message-ID: <5hep07F3jael1U2@mid.uni-berlin.de>

Roman schrieb:
> Is there a package that converts a string that contains special
> characters in xml to to literal value.  For instance, converts string
> http://myhome/&param to http://myhome/&amp;param.

import xml.sax.saxutils

print xml.sax.saxutils.escape("I'm a happy & friendly guy, and 1 < 3 - 
never forget that!")

Diez


From bdesth.quelquechose at free.quelquepart.fr  Mon Aug 20 13:59:15 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 20 Aug 2007 19:59:15 +0200
Subject: Where we need to use Python ?
In-Reply-To: <mailman.115.1187793425.32294.python-list@python.org>
References: <1187596936.136499.200280@l22g2000prc.googlegroups.com><mailman.5.1187616200.26576.python-list@python.org>	<46cc26ed$0$432$426a74cc@news.free.fr>
	<mailman.115.1187793425.32294.python-list@python.org>
Message-ID: <46ccab4c$0$410$426a74cc@news.free.fr>

Terry Reedy a ?crit :
> |"Bruno Desthuilliers" Terry Reedy a ?crit :
> |
> |> The CPython implementation of the langauge compiles Python to 
> proprietary
> |> byte code
> 
> |Hahem... "proprietary" is certainly not the right term here.
> 
> a. you are being nitpicky, 

Possibly.

> overly in my opinion

Possibly too.

> b. you failed to suggest a better term, 

True. What about "specific", then ?

> hence cannot expect the same of me

This is debatable, but I don't feel like debating on this.

> In any case, CPython is owned by PSF (which gives it away).  Its bytecode 
> is an private implementation detail subject to change in any .x version as 
> the developers see fit. 

Which AFAICT doesn't make it "proprietary", for the common definition of 
"proprietary" wrt/ softwares. Python is free software, which means that 
anyone can freely write either it's own Python compiler (which is 
basically what Jython and IronPython are) or write a compiler for any 
language to CPython's VM.

Sorry for being so nitpicky.


From ptmcg at austin.rr.com  Mon Aug 20 11:30:05 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 20 Aug 2007 08:30:05 -0700
Subject: Newbee Question
In-Reply-To: <mailman.15.1187620149.26576.python-list@python.org>
References: <mailman.15.1187620149.26576.python-list@python.org>
Message-ID: <1187623805.425320.93320@a39g2000hsc.googlegroups.com>

On Aug 20, 9:23 am, "HD1956" <hd7... at hotmail.com> wrote:
> This is probably a simple code. I am a truck driver who gets paid by
> stops and cases. I am trying to figure out how to code my stop pay. I
> get 40 cents per stop up to 22 stops, and $1.40 per stops after that.

You'll get top marks for turning in the shortest program!

norm = 0.4
ot = 1.4-norm
otStart = 22
calcPay = lambda stops : norm*stops+ot*max(stops-otStart,0)

-- Paul



From sturlamolden at yahoo.no  Fri Aug 31 11:44:04 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: Fri, 31 Aug 2007 08:44:04 -0700
Subject: strings (dollar.cents) into floats
In-Reply-To: <46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
References: <mailman.140.1188483282.28954.python-list@python.org>
	<877incd20i.fsf@benfinney.id.au>
	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <1188575044.874256.42960@50g2000hsm.googlegroups.com>

On 31 Aug, 02:12, Wildemar Wildenburger
<lasses_w... at klapptsowieso.net> wrote:

> I've heard (ok, read) that several times now and I understand the
> argument. But what use is there for floats, then? When is it OK to use them?

There are fractions that can be exactly represented by floats that
cannot be exactly represented by decimals. There are fractions that
can be exactly represented by decimals that cannot be exactly
represented by floats.

Which one is better? Which do we prefer?

What a float cannot do is to represent a decimal fractional number
(e.g. 1.1) exactly. If we need that, we cannot use floats. A notable
example is monetary computations, it covers 99% of the use for decimal
numbers in computers. For this reason, we should never use floats to
add 10 cents to a dollar. The use of decimals for monetary
calculations is mandatory.

Floats are written as decimal fractional numbers in program code, and
they are printed as decimal fractional numbers on the screen. A novice
programmer may for this reason easily mistake floats for being
decimals. But inside the computer floats are something very different.
Floats do not represent decimal fractional numbers. Floats represent
binary fractional numbers. Decimal numbers are base-10, binary numbers
are base-2. Floats and decimals are similar but different.

It is much easier to manipulate for computers than decimals. Digital
electronics by convention only has two states, TTL voltage levels 0.0
V and 5.0 V, which are taken to mean 0 and 1 in binary (or false and
true in boolean) respectively. Computers work internally with binary
numbers. Floats are preferred to decimals in e.g. numerical maths and
other scientific computing for their better performance speed wise.
Knowledge of the behaviour of floats, e.g. how they cause rounding and
truncation errors, is pivotal in that field of computer science. For
most purposes, we could replace floats with decimals. But then we
would suffer a major speed penalty.

Decimals are only "precise" if the input values can be represented
precisely by decimal fractions. If we typed 1.1 and took that to mean
"one dollar and 10 cents", then certainly "exactly 1.1" was what we
meant. But if we ment "1.1 centigrades read from a mercury
thermometer", we would actually (by convention) mean "something
between 1.05 and 1.14 centigrades". Decimals also fail to be exact if
we try to compute things like "1.0/3.0". 1/3 does not have an exact
representation in decimal, and we get an approximation from the
computer.

For purposes where exact precision is not needed, decimals are neither
better nor worse than floats. This accounts for 99% of the cases where
fractional numbers are used on a computer.

More about floating point numbers here:
http://www.math.byu.edu/~schow/work/IEEEFloatingPoint.htm


Sturla Molden




From hvb at efrontier.com  Fri Aug  3 20:20:43 2007
From: hvb at efrontier.com (harold barker)
Date: Fri, 3 Aug 2007 17:20:43 -0700
Subject: Sorting Unix mailboxes
Message-ID: <EA41D615-F90E-40A3-93AC-E4D25BB6ADE8@efrontier.com>


Was your mailbox module competed?  If so where can i find it?



From millerdev at gmail.com  Tue Aug 21 20:49:51 2007
From: millerdev at gmail.com (Daniel)
Date: Tue, 21 Aug 2007 17:49:51 -0700
Subject: defaultdict of arbitrary depth
In-Reply-To: <1187321113.841198.195100@22g2000hsm.googlegroups.com>
References: <1187321113.841198.195100@22g2000hsm.googlegroups.com>
Message-ID: <1187743791.286531.155970@m37g2000prh.googlegroups.com>

Any reason why this wouldn't work?

>>> from collections import defaultdict
>>> def rdict(*args, **kw):
...     return defaultdict(rdict, *args, **kw)
...
>>> d = rdict()
>>> d[1][2][3][4][5] # ...
defaultdict(<function rdict at 0x61370>, {})


~ Daniel



From aahz at pythoncraft.com  Wed Aug 29 10:11:00 2007
From: aahz at pythoncraft.com (Aahz)
Date: 29 Aug 2007 07:11:00 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
Message-ID: <fb3upk$2vu$1@panix3.panix.com>

In article <1188349440.309634.182800 at z24g2000prh.googlegroups.com>,
Russ  <uymqlp502 at sneakemail.com> wrote:
>
>I just stumbled onto PEP 316: Programming by Contract for Python
>(http://www.python.org/dev/peps/pep-0316/). This would be a great
>addition to Python, but I see that it was submitted way back in 2003,
>and its status is "deferred." I did a quick search on comp.lang.python,
>but I don't seem to see much on it. Does anyone know what the real
>status is of getting this into standard Python? Thanks.

The way to get this into Python is to get people to use it as a
stand-alone module.  It's already in PyPI, so now it's time for some
marketing.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From vedrandekovic at v-programs.com  Sat Aug 11 15:50:38 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Sat, 11 Aug 2007 12:50:38 -0700
Subject: python 2.5 bug
In-Reply-To: <MPG.2128171394cc51d9989700@news.individual.de>
References: <1186825286.493878.80380@l70g2000hse.googlegroups.com>
	<5i5fktF3ml00gU1@mid.uni-berlin.de>
	<1186826980.346619.287670@r34g2000hsd.googlegroups.com>
	<46bdfb3f$0$5102$ba4acef3@news.orange.fr>
	<MPG.2128171394cc51d9989700@news.individual.de>
Message-ID: <1186861838.057027.179250@l70g2000hse.googlegroups.com>

On 11 kol, 20:58, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> * Laurent Pointal (Sat, 11 Aug 2007 20:09:03 +0200)
>
> >  vedrandeko... at v-programs.com wrote:
> > > On 11 kol, 11:59, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> > >> On Sat, 11 Aug 2007 02:41:26 -0700, vedrandekovic wrote:
> > >> > I was install Python 2.5 and uninstall Python 2.4 now I cannot run my
> > >> > scripts, only from idle
>
> > IMHO Python 2.4 was registered for .py files, Python 2.5 take precedence
> > when installed, but when Python 2.4 has been removed, it remove .py files
> > association too (so break Python 2.5 association).
>
> > * manually associate .py/.pyc/.pyo files to python.exe, .pyw files to
> > pythonw.exe.
>
> > * or reinstall Python 2.5 so that it re-setup ad-hoc associations.
>
> Yeah. Did the Original Poster mention any details about his problem.
> Like - for instance - that he's using Windows?
>
> Thorsten

Hello,

Now I was restart my windows and python 2.5 also.Now everything works
fine except python and py2exe script install ( of course something
must destroy my day ) now when I run:

$ cd c:\Python25\Lib\site-packages\
$ python mysetup.py py2exe
'python' is not recognized as an internal or external command,
operable program or batch file.

why?


Regards,
Vedran



From soundplay at gmail.com  Mon Aug 27 12:46:12 2007
From: soundplay at gmail.com (SHY)
Date: Mon, 27 Aug 2007 18:46:12 +0200
Subject: passing arguments with ampersands
In-Reply-To: <op.txcltwwwx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <f6be0af40708180354u719f5c71p2be27e0ee8317f9b@mail.gmail.com>
	<20070818112913.GA3632@gmail.com>
	<f6be0af40708180524n8d11a68xfcbee5c7f268bdea@mail.gmail.com>
	<op.txcltwwwx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <f6be0af40708270946l3196941aqf515732308614d5a@mail.gmail.com>

that was the problem. when i manually reassociated the extension, i somehow
didnt quote the argument for the filename. my bad.

thanks for the various explanations and options for this :)

cheers.

2007/8/20, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>:
>
> En Sat, 18 Aug 2007 09:24:35 -0300, SHY <soundplay at gmail.com> escribi?:
>
> > theres no special portion of code, just the one that handles filenames
> > with
> > spaces.
> > the problem is that when i associate a file extension to my application
> > and
> > i open it, the filename is not quoted before passed as an arguement. i
> > dont
> > know if its the problem of windows or something, or it was just my fault
> > when i incorrectly associated the extension.
>
> How did you associate it?
> Usually the registry entries are:
>
> HKCR\.ext = filetype
> HKCR\filetype = File Description
> HKCR\filetype\shell\open\command = "path\to\your\program" "%1"
>
> (Note the double quotes around %1)
>
> Get it right at the registry, and forget all that trickery joining
> sys.argv parts
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
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From oliver.andrich at gmail.com  Mon Aug 20 07:30:50 2007
From: oliver.andrich at gmail.com (oliver.andrich at gmail.com)
Date: Mon, 20 Aug 2007 11:30:50 -0000
Subject: ctypes and unsigned char*
In-Reply-To: <1187548845.674582.69630@w3g2000hsg.googlegroups.com>
References: <1187545486.797017.308720@a39g2000hsc.googlegroups.com>
	<1187548845.674582.69630@w3g2000hsg.googlegroups.com>
Message-ID: <1187609450.542644.50430@w3g2000hsg.googlegroups.com>

On 19 Aug., 20:40, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
> In the first case, use a plain c_char_p - the individual "chars" are
> already unsigned in Python (that is, ord(xxx[i]) is always positive)
> In the second case, first define the pointer type:
>
> c_ubyte_p = POINTER(c_ubyte)
> your_function.restype = c_ubyte_p

I will have to look into that. My function I want to wrap has the
following signature

unsigned char *MagickGetImageProfile(MagickWand *wand,const char
*name,
    size_t *length)

Well, the first argument and the second are straight forward, and work
as expected. The last argument also works and it should take up the
length of the string (unsigned char *). If I now do

dll.MagickGetImageProfile.restype = c_char_p
result = dll.MagickGetImageProfile(wand, "8bim", byref(length))

result is either an empty string or a 3 bytes long string, while
length containes the correct length of 1086 bytes for example. I also
tried

dll.MagickGetImageProfile.restype = POINTER(c_ubyte)

with the same result. But maybe I should do some further debugging....

Best regards,
Oliver



From http  Mon Aug  6 07:34:35 2007
From: http (Paul Rubin)
Date: 06 Aug 2007 04:34:35 -0700
Subject: Best programs written completly in Python
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
Message-ID: <7xhcncc2wk.fsf@ruckus.brouhaha.com>

Franz Steinh?usler <franz.steinhaeusler at gmx.at> writes:
> b) Utilities/System

I'm not sure if anyone has mentioned mercurial in this thread.
It's a distributed source control system, sort of the next generation
after systems like CVS/SVN.   See www.selenic.com/mercurial

> d) Web/Newsreader/Mail/Browser

Mailman (mailing list manager)?  I tend to use emacs for all the
client side stuff.


From sentientholon at gmail.com  Wed Aug 22 14:27:07 2007
From: sentientholon at gmail.com (Frederick Polgardy)
Date: Wed, 22 Aug 2007 18:27:07 -0000
Subject: How do I express a backslash in a string?
In-Reply-To: <46cc723c$0$16263$88260bb3@free.teranews.com>
References: <46cc723c$0$16263$88260bb3@free.teranews.com>
Message-ID: <1187807227.530763.32790@i38g2000prf.googlegroups.com>

On Aug 22, 1:19 pm, Tobiah <t... at tobiah.org> wrote:
> >>> "'"
> "'"
> >>> "\'"
> "'"
> >>> "\\'"
> "\\'"
> >>> "\\\'"
> "\\'"
>
> This is quite different than any other language
> that I am used to.  Normally, a double backslash
> takes away the special meaning of the last backslash,
> and so you are left with a single backslash.
>
> How do I express the single backslash?
>
> Thanks,
>
> Tobiah

It IS a single backslash - the interpreter in interactive mode
displays the string literal (escaped) version of what you entered,
which is, well, what you entered.  If you print it instead, you'll see
the actual string value.

>>> '\\'
'\\'
>>> print '\\'
\

Fred



From edgrsprj at ix.netcom.com  Thu Aug 30 09:12:17 2007
From: edgrsprj at ix.netcom.com (E.D.G.)
Date: Thu, 30 Aug 2007 07:12:17 -0600
Subject: Important Research Project
Message-ID: <13ddcvm1bsu3s94@corp.supernews.com>

Important Research Project  (Related to computer programming)

Posted by E.D.G. on August 30, 2007 edgrsprj at ix.netcom.com

    This report is being posted to a number of Internet Newsgroups to see if
there are any experienced computer programmers who would like to provide
some assistance with an effort to develop a Perl language computer program.

    Interested parties can try contacting me by e-mail or by posting a
response note to the comp.lang.perl.misc newsgroup.  They would need to
download a recent (free) MSI copy of Perl from the ActiveState Web site and
get it running on a Windows XP or Vista system.

http://www.activestate.com

    I am presently using Perl 5.8.8 but plan to upgrade to the latest
version as soon as possible.  People can use Windows 98 if that is the only
operating system available.  Perl also runs on other operating systems.  But
at this time I specifically need help with the Windows version.

    The goal is to have a single Perl program (or modules) perform functions
that have been done by a sizeable collection of other language programs in
the past.

    Help is presently needed with learning how to get Perl to generate
charts and also produce standalone .exe copies of itself.  The plan is to
then make those .exe copies available to other scientific researchers around
the world for free use along with free use updates when they become
available.  If other researchers wish to get Perl running on their own
computers then they will probably also be given the source code for the
original program for free use so that they can do their own development
work.

    Perl was originally chosen because it is quite versatile, is a free
download, and is supported both by ActiveState and quite a few independent
programmers.  So other researchers could get their own versions running
without having to worry about viruses or cost.

    So far the work is fairly advanced.  The effort has been underway for at
least a decade.  The core data generation program was formally copyrighted
several years ago.  My present version of Perl will send data to Windows as
if it were being manually typed into the keyboard (important for controlling
other programs).  And it can directed to respond to most keystrokes even
when another program is the active one.  Unfortunately, Windows also
presently responds to those keystrokes.  And that complicates things a bit.

    Not being a professional computer programmer I have been finding it
difficult to get new features such as a chart generating ability merged with
and running with Perl.  And the entire research project is now being slowed
as a result.  One of my colleagues has done an extensive amount of work with
Basic.  And I even offered to pay him to help with the Perl development
effort.  But after he downloaded a copy of Perl and examined it he decided
that this would involve too much effort.  I have to agree with him.

    Once it is possible to create charts and .exe versions the plan is for
researchers around the world to develop Perl modules for generating a
variety of data related to sun, moon, planet, ocean tide crest and trough,
and Solid Earth Tide locations.  Most of those data can already be generated
with other programs.  Some of the data are not yet available anywhere as far
as I am aware.  If the effort is unusually successful the Perl program (or
modules) might eventually be converted to CGI programs that will run at one
or more Internet Web sites.





From tkpmep at hotmail.com  Fri Aug 17 09:08:37 2007
From: tkpmep at hotmail.com (tkpmep at hotmail.com)
Date: Fri, 17 Aug 2007 06:08:37 -0700
Subject: Downloading multiple csv files from a website
Message-ID: <1187356117.474747.189980@g4g2000hsf.googlegroups.com>

I'd like to download data from the website
http://www.russell.com/Indexes/performance/daily_values_US.asp. On
this web page, there are links to a number of .csv files, and I'd like
to download all of them automatically each day. The file names are not
visible on the page, but if I click on a link, a csv file opens in
Excel. I've searched this group and looked into urllib, but have not
found functions or code snippets that will allow me to download and
rename each file. Would someone kindly point me to appropriate
libraries/functions and/or code snippets that will get me started?

Thanks in advance

Thomas Philips



From raims at dot.com  Tue Aug 14 23:25:00 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Wed, 15 Aug 2007 05:25:00 +0200
Subject: make images with python
References: <1187147338.400947.181010@x40g2000prg.googlegroups.com>
Message-ID: <1i2vg8p.1d8t42r1jzvm9iN%raims@dot.com>

stefano <ssalvatori at gmail.com> wrote:
> I need make some images using python but i'm lost :P

<http://www.pythonware.com/products/pil/>

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From zyzhu2000 at gmail.com  Wed Aug  1 18:47:07 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Wed, 01 Aug 2007 22:47:07 -0000
Subject: A way to re-organize a list
In-Reply-To: <5hanm6F3inuf2U3@mid.uni-berlin.de>
References: <1184857535.033057.49150@m3g2000hsh.googlegroups.com>
	<1185932029.235957.226720@e9g2000prf.googlegroups.com>
	<5hanm6F3inuf2U3@mid.uni-berlin.de>
Message-ID: <1186008427.082119.190150@g12g2000prg.googlegroups.com>

On Aug 1, 1:31 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Wed, 01 Aug 2007 01:33:49 +0000, beginner wrote:
> > On Jul 19, 10:05 am, beginner <zyzhu2... at gmail.com> wrote:
> >> Hi Everyone,
>
> >> I have a simple list reconstruction problem, but I don't really know
> >> how to do it.
>
> >> I have a list that looks like this:
>
> >> l=[ ("A", "a", 1), ("A", "a", 2), ("A", "a", 3), ("A", "b", 1), ("A",
> >> "b", 2), ("B", "a", 1), ("B", "b", 1)]
>
> >> What I want to do is to reorganize it in groups, first by the middle
> >> element of the tuple, and then by the first element. I'd like the
> >> output look like this:
>
> >> out=[
> >>    [    #group by first element "A"
> >>           [("A", "a", 1), ("A", "a", 2), ("A", "a", 3)], #group by
> >> second element "a"
> >>           [ ("A", "b", 1), ("A", "b", 2)], #group by second element
> >> "b"
> >>    ],
> >>    [   #group by first element "B"
> >>           [("B", "a", 1)],
> >>           [("B", "b", 1)]
> >>    ]
> >> ]
>
> >> All the solutions I came up with are difficult to read and even harder
> >> to go back and change, and I just feel are too complicated for such a
> >> simple problem. I am wondering if anyone here has some insight.
>
> >> If there is a 'functional' way to do this, it would be even greater.
>
> >> Thanks,
> >> Geoffrey
>
> > I guess I still don't quite get functional programming. Here is my
> > imperitive way to do it in O(n).
>
> I didn't try to follow it but are you sure about O(n)?  With the inner
> loop going from 0 to `level` it looks suspiciously quadratic to me.  You
> really should try to grasp the `itertools.groupby()` solution.
>
> And the result of that script looks strange:
>
> [[[[1, 2, 3, 4], [1, 2, 4, 5], [1, 2, 'A', 'B']]], [[[2, 2, 'A', 'C']]]]
>
> Aren't the two top level elements wrapped in one list too much?
> Furthermore the test data doesn't contain an example where the first item
> is the same but the second item is different.
>
> > def group_items(source_list, f_list, target=[]):
>
> Default arguments are evaluated *once* when the ``def`` is executed.  So
> all calls to this function share the same list object bound to `target`.
> Call this function twice without an explicit `target` and you'll see the
> problem.
>
> Ciao,
>         Marc 'BlackJack' Rintsch- Hide quoted text -
>
> - Show quoted text -


Wow. Thanks for the life-saving response. It uncovers a serious bug
about the default argument! Thank you Marc!

It is actually O(n) because it scans the list of records once and
exactly once. The inner loop is trying to make multi-level grouping.
In f_list, you define each level of grouping. For example,
f_list=[f,g] in the above code means 1) you want to put records into
sub-lists so that within each sub-list, the first element of the
records are the same. then 2) within each group, you want to further
group them by the second element of the records. That is why the
results look like the following:

[
   [ #first level grouping
      [[1, 2, 3, 4], [1, 2, 4, 5], [1, 2, 'A', 'B']] #second level
grouping
   ],
   [ #first level grouping
      [[2, 2, 'A', 'C']] #second level grouping
   ]
]

In the example, the inner loop is executed twice. So it loops a total
of 2*n times and it is O(n). If you want to make m level grouping, the
execution time would be O(m*n).

I looked at itertools. It is really cool. But if I just want to make
multiple nested groups, reusing the above function is going to take
less code than using itertools.groupby every time. Also, in
itertools.groupby, I think you have to scan the list of records
multiple times to make nested groups. Although it is still O(m*n),
each operation of groupby is going to be slower.

The one thing I still haven't figured out, is to make nested
generators of multiple nested grouping, so that I can use a multi-loop
to traverse them. A loop like below:

for i in big_group:
  for j in i:
    for k in j:
      .....

i, j, k are generators.

I think short of changing my function to be recursive and the outer
function 'yield' to the inner function, which calls yield to make an
inner generator, it will be difficult to do.

Thanks again for pointing out the default value problem.

Geoffrey



From mccredie at gmail.com  Fri Aug 24 13:13:00 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Fri, 24 Aug 2007 10:13:00 -0700
Subject: I can't get value of entry box, Tinker
In-Reply-To: <eb79828c0708240816o182b1e75o67fc9b27b6475051@mail.gmail.com>
References: <eb79828c0708240816o182b1e75o67fc9b27b6475051@mail.gmail.com>
Message-ID: <9e95df10708241013j3a2999f4nc3cf34979804d695@mail.gmail.com>

> What/should I, can I do?

Fix your code?

> def login():
>     global e2,e1
>     print e2.get()
>     print e1.get()

That should work.

Matt


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Aug  1 06:36:50 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 01 Aug 2007 12:36:50 +0200
Subject: Extending Python by Adding Keywords & Data types
References: <1185913739.879602.212950@w3g2000hsg.googlegroups.com>
	<5h9n66F3j641tU5@mid.uni-berlin.de>
	<1185932558.472578.103690@o61g2000hsh.googlegroups.com>
Message-ID: <5hb622F3j36bgU1@mid.individual.net>

Maximus Decimus wrote:

> Since, I am an amateur in using python, 

<http://en.wikipedia.org/wiki/Amateur>
| Most commonly an amateur is understood to be someone who does
| something without pay or formal training. Conversely, a
| professional is someone who has received training in a particular
| area and who also makes a living from it.

So, you're not being paid coding in Python, and/or have
no "official" training. Many readers of this list share this
situation, me too.

> could you please be more specific. 

I return the question. Your statements are most vague. Please give
an example of what you try to realise.

> For new data types, you had asked to implement the classes. I
> intend to use C for implementing these data types. So where do i
> need to implement these classes ie under which file or module in
> the python package. 

Please do yourself a favor and read. Feel free to ask again for
specific problems.

http://docs.python.org/tut/node3.html
http://docs.python.org/tut/node11.html

Regards,


Bj?rn
-- 
BOFH excuse #135:

You put the disk in upside down.



From david at asdf.asdf  Thu Aug 23 22:54:14 2007
From: david at asdf.asdf (bambam)
Date: Fri, 24 Aug 2007 12:54:14 +1000
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
Message-ID: <13csi2tn49esmc3@corp.supernews.com>

Wos! Several different thoughts:

An object using yield to return only the relevant pages, one at a time.
Pop to remove the items from the list.
A dictionary to map between the strings and the integers.

The dictionary was particularly unexpected. Eventually, I
plan to change the string ports to device names. On the other
hand, it looks like the only reason I have port numbers is
to use as an index in things like this.

After examining your suggestion, I realised that another thing
I am interested in could be generalised: I want the complement
of the set of ports in pages, given a universal set in tempList.
Ignoring the break condition for the moment, and my problem
with int(port)/str(port), would you have offered a different solution
if I had asked for the relative complement of a small set?

a= ['a','b','c']
b= ['b']
c= a-b #set theoretic difference, a\b, a.~b, ['a','c']

Steve.

"Zentrader" <zentraders at gmail.com> wrote in message 
news:1187898049.734696.9500 at l22g2000prc.googlegroups.com...
> Does page count change? i.e. is it necessary to retrieve it in every
> loop or
> tempList = ['1','2','3','4','5','6','7','8']
> sampleList=[]
> page_count = self.parent.GetPageCount()
> <snipped>
>     for i in range(page_count):
>
> Also, once pagefound is set to True, all pages following will not be
> appended to sampleList because it is not initialized to False under
> the "for i in range(self.parent.GetPageCount())" loop.
>
> Finally, if I understand the logic and question correctly, you want
> something like
> tempList = ['1','2','3','4','5','6','7','8']
> sampleList=[]
> page_count = self.parent.GetPageCount()
> for port in tempList:
>    for i in range(page_count):
>        page=self.parent.GetPage(i)
>        if (hasattr(page, "port")) and (page.port != int(port)) :
>            sampleList.append(port)
>
> or perhaps (I'm not sure)
> tempList = [1, 2, 3, 4, 5, 6, 7, 8]
> sampleList=[]
> page_count = self.parent.GetPageCount()
> for i in range(page_count):
>        page=self.parent.GetPage(i)
>        if (hasattr(page, "port")) and (page.port not in tempList) :
>            sampleList.append(port)
> HTH
> 




From miki.tebeka at gmail.com  Mon Aug 13 20:42:39 2007
From: miki.tebeka at gmail.com (Miki)
Date: Tue, 14 Aug 2007 00:42:39 -0000
Subject: import * is not allowed ??
In-Reply-To: <mailman.1943.1187050079.22759.python-list@python.org>
References: <mailman.1943.1187050079.22759.python-list@python.org>
Message-ID: <1187052159.056797.252460@q4g2000prc.googlegroups.com>

Hello Stef,

> can anyone explain a little bit more what this error message means:
>
>   import * is not allowed in function 'JAL_MAIN_RUN' because it contains
> a nested function with free variables (JAL_simulation_file.py, line 22)
>
> what are "free variables" ?
http://mitpress.mit.edu/sicp/full-text/book/book-Z-H-10.html#%_idx_590

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



From mensanator at aol.com  Mon Aug 20 13:01:53 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Mon, 20 Aug 2007 10:01:53 -0700
Subject: I Need help from all the group participants
In-Reply-To: <fac7nj$ci9$1@localhost.localdomain>
References: <fac7nj$ci9$1@localhost.localdomain>
Message-ID: <1187629313.357121.196370@q4g2000prc.googlegroups.com>

On Aug 20, 9:16 am, Boris Ozegovic <ninja.krmen... at nes.com> wrote:
> Hi,
>
> I am working on some system, and the communication will take place through
> the chatterbot which will be written in AIML (interpreter is written in
> Python).  English is not my mother tongue, so I need huge favor:  if all of
> you can write two sentences, so that I could have greater pattern base.
> The first sentence is finding someone's heart rate, example: "Please, can
> you tell me John's heart rate", and the other one is setting the alarm when
> someone's heart rate is lower then x, and greater than y, example: "Can
> you, please, send me information when John's heart rate is lower than 60,
> and greater than 100".  You can manipulate time (right now, now, right this
> moment), and everything else you can think about.    

The only sentence that comes to mind is:

"I hope I never find myself in a hospital that uses your system."

>
> --
> Ne dajte da nas la?ljivac Bandi? truje:http://cnn.blog.hr/arhiva-2007-06.html#1622776372




From steve at holdenweb.com  Tue Aug  7 21:39:05 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Aug 2007 21:39:05 -0400
Subject: Something in the function tutorial confused me.
In-Reply-To: <46B8626A.2070303@bigfoot.com>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
	<46B8626A.2070303@bigfoot.com>
Message-ID: <f9b6ro$afg$1@sea.gmane.org>

Ricardo Ar?oz wrote:
> Lee Fleming wrote:
>> Thanks for all the help, everyone. I guess I was confused with default
>> arguments that were mutable and immutable. I will continue to look
>> over these posts until I understand what is happening.
>>
>> I cannot believe the number of helpful responses I got!
>>
> 
> Apparently he didn't understand.
> Neither did I.
> 
> Either (i)y's initial value (None or []) is saved somewhere to be
> retrieved every time the function is called without 2nd argument, or
> (ii) y keeps the value it has when last exiting the function (if there
> is a third option, please mention it).
> 
> (i) (a) whenever the function is called without 2nd argument the value
> None is retrieved and assigned to y, thus causing [] to be assigned to y
> by the 'if' statement.
> (i) (b) But then if it is "def f(x, y = [])" the list [] should be ALSO
> saved somewhere and when the function is called without 2nd argument it
> should be retrieved and assigned to y, thus y would always be [] when
> you enter the function without 2nd arg.
> 
> (ii) (b) if y keeps the value it has when last exiting the function that
> would explain that the second time you call it the list returned will
> have two members.
> (ii) (a) But then if it is "def f(x, Y = None)" when the "if" is
> evaluated the empty list is assigned to y. So y will NO LONGER be None.
> The second time the function is called y is NOT None (remember it keeps
> it's last value) and the function returns a list with two members.
> 
> So, as I see it, the behavior is not coherent, the function treats y
> differently according to the value it has assigned.
> 
> Please correct me!

OK. The difference is that [] is a mutable value, while None is 
immutable. So when the function starts out with [] as y's value, and the 
value gets changed, the same value is used the next time the function is 
called and the second call sees the mutated value.

When the function starts out with None as y's value any assignment to y 
causes it to reference a different value (since None is immutable). So 
the next time the function is called y is pointing at the None that it 
was pointing at the last time the function was called (since None cannot 
be mutated).

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Aug 12 16:20:15 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 12 Aug 2007 22:20:15 +0200
Subject: wxPython - drawing without paint event
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
	<1186738813.373909.96230@x35g2000prf.googlegroups.com>
	<1186796567.331348.42450@q3g2000prf.googlegroups.com>
	<5i5l0dF2lortaU1@mid.individual.net>
	<1186883988.585048.16590@m37g2000prh.googlegroups.com>
	<5i8befF3o5no1U1@mid.individual.net>
	<1186928595.014008.61950@b79g2000hse.googlegroups.com>
Message-ID: <5i98bsF3nmbavU1@mid.individual.net>

7stud wrote:
> I don't.  "wxPython in Action" is by far the worst computer book
> I've ever purchased.  It's poorly organized, poorly written, and
> full of mistakes--and it's expensive.  The fact that the authors
> foist that piece of junk on unsuspecting newbies is a crime.

Your opinion (I've seen much worse). But any suggestions what's
better for a beginner? The (incomplete) tutorial surely not.

Regards,


Bj?rn

-- 
BOFH excuse #88:

Boss' kid fucked up the machine



From indu_shreenath at yahoo.co.in  Thu Aug  9 03:20:49 2007
From: indu_shreenath at yahoo.co.in (Indu Shreenath)
Date: Thu, 9 Aug 2007 08:20:49 +0100 (BST)
Subject: how to get output.
In-Reply-To: <5hvrhhF3m15c7U1@mid.uni-berlin.de>
Message-ID: <392550.47462.qm@web8601.mail.in.yahoo.com>


Hey,
  I did write the following,
  but it does not work.
   
  import subprocess as sp
try:
       = sp.Popen("DIR . /AD /B", stdout=sp.PIPE)
    result = p.communicate()[0]
    print result           
 except:   
       print "error"
   
  This throws error.
  DIR . /AD /B will list out only directories in the current directory.
   
  Thanks,
  Indu
"Diez B. Roggisch" <deets at nospam.web.de> wrote: 
  indu_shreenath schrieb:
> Hey,
> I want to get the output of "DIR /AD /B" command to a varriable using 
> python. How can I do this?

Using the subprocess-module.


However, I'm not sure what DIR /AD /B does - but there are many 
functions in module os that might deliver what you want without invoking 
an external command.

Diez
-- 
http://mail.python.org/mailman/listinfo/python-list


       
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From nick at craig-wood.com  Tue Aug 21 14:30:06 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 21 Aug 2007 13:30:06 -0500
Subject: File Read Cache - How to purge?
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
	<5ivl9fF3rafecU1@mid.uni-berlin.de>
	<peerp4-k4b.ln1@darkstargames.dnsalias.net>
Message-ID: <slrnfcm9fe.6kr.nick@irishsea.home.craig-wood.com>

Wolfgang Draxinger <wdraxinger at darkstargames.de> wrote:
>  Marc 'BlackJack' Rintsch wrote:
> 
> > You mean reading the file without actually reading it!?  :-)
> 
>  Linux provides its specific syscall 'readahead' that does exactly
>  this.

It isn't in the posix module, but you can use it with ctypes like this

    >>> from ctypes import *
    >>> libc = CDLL("libc.so.6")
    >>> libc.readahead
    <_FuncPtr object at 0xb7de9714>
    >>> f=open("z","rb")
    >>> f.fileno()
    3
    >>> libc.readahead(f.fileno(), 0, 0x1000000)
    0
    >>> 

(That example could do with more ctypes magic to set the types and the
return type of readahead...)

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


From stefan.behnel-n05pAM at web.de  Tue Aug 21 02:44:27 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Tue, 21 Aug 2007 08:44:27 +0200
Subject: urllib2.urlopen(url) pulling something other than HTML
In-Reply-To: <1187642916.824037.298750@o80g2000hse.googlegroups.com>
References: <1187635452.841155.88720@a39g2000hsc.googlegroups.com>
	<1187641080.516885.122350@g4g2000hsf.googlegroups.com>
	<1187642916.824037.298750@o80g2000hse.googlegroups.com>
Message-ID: <46CA89CB.5030809@web.de>

dogatemycomputer at gmail.com wrote:
> I personally think the application itself "feels" more complicated
> than it needs to be but its possible that is just my inexperience. I'm
> going to do some reading about the HTMLParser module.  I'm sure I
> could make this spider a bit more functional in the process.

That's because you are using the standard library to parse HTML. While
HTMLParser can do what you want it to, it's rather hard to use, especially for
new users.

If you want to give lxml.html a try, a web spider would be something like this:

    import lxml.html as H

    def crawl(url, page_dict, depth=2, link_type="a"):
        html = H.parse(url).getroot()
        html.make_links_absolute()

        page_dict[url] = (link_type, html)

        for element, attribute_type, href in html.iterlinks():
            if href not in page_dict:
                if element.tag in ("a", "img"):  # ignore other link types
                    crawl(href, page_dict, depth-1, element.tag)

    page_dict = {}
    crawl("httt://www.google.com", page_dict, 2)

    # and now do something with the pages in page_dict.

lxml can actually do a lot more for you, just look through the docs to get an
idea. You can find lxml here:

http://codespeak.net/lxml

lxml.html is not yet released, though. Its first release (as part of lxml 2.0)
is expected around the end of august. You can find some docs here:

http://codespeak.net/lxml/dev

and you can (easily) install it from Subversion sources:

http://codespeak.net/svn/lxml/trunk

Have fun,
Stefan


From ronysk at hotmail.com  Mon Aug  6 04:00:27 2007
From: ronysk at hotmail.com (ronysk)
Date: Mon, 6 Aug 2007 01:00:27 -0700 (PDT)
Subject: Python/C API, Numeric Python, Type Conversion
Message-ID: <12012369.post@talk.nabble.com>


Hi,

I am posting here to seek for help on type conversion between Python
(Numeric Python) and C. 

Attachment A is a math function written in C, which is called by a Python
program.  I had studied SWIG and Python/C API a bit.  I was able to pass
numeric array (Numeric Python) into the C function and access/change these
arrays. 

Problem I am having is that I couldn't quite get the array converted back to
some PyObject or something that Python Interpreter can understand.  So,
alternatively I passed an empty numeric array as well as other arguments,
and had return value(result) stored in that chunk of place.  It sort of
worked. However, if such function was called few times, it would result in
segmentation fault.

This is a lousy way to get around the return type matter, and probably is
causing seg fault.  Besides a correct type conversion, a proper SWIG
interface probably could've saved all the fuss, maybe? ( attachment B is the
SWIG interface I am using for this function)

I am trying to study more on C API section of NumPy document, and to gain
more knowledge off SWIG(which I only understand very basic way of it).  Any
feedback will be great.  Thanks for your time, friends.  Truly appreicate
your precious time. 

Ronnie


P.S. Those PyObject pointers are created with Numeric.Array( data,
Numeric,Float64).


Attachment A
[code=c]
/*
*******************************************************************************
*
*  Function Name : 
*     cressman()
*  
*  Usage :
*     PyObject* cressman
*     (int nx,int ny,PyObject* result,PyObject* us,PyObject* rlats,
PyObject* 
*      rlons, int nst,float disinf,float slon,float elon,float slat,float
elat)
*
*  Description :
*     Objective analysis by Cressman method
*
*  Aumument :
*     nx(I)    : x-dimension of grid data 
*     ny(I)    : y-dimension of grid data
*     result(I): an empty result set
*     us(I)    : input station data                
*     rlons(I) : x-coordinate of station
*     rlats(I) : y-coordinate of station
*     nst(I)   : number of station data
*     disinf(I): influence radius distance(km)
*     slon(I)  : x-coordinate of start grid longitude
*     elon(I)  : x-coordinate of end grid longitude
*     slat(I)  : y-coordinate of start grid latitude
*     elat(I)  : y-coordinate of end grid latitude
*     
*   Data Files : None
*  
*   Called Function :
*     ardist()    
*
*   Return Value : 
*      data    : grid data value    
*
*   Linking Lib : None
*
***************************************************************************                         
*/
PyObject* cressman
(int nx,int ny,PyObject* result,PyObject* us,PyObject* rlats, PyObject*
rlons, int nst,float disinf,float slon,float elon,float slat,float elat)
{
   if( nst < 1)
       return;

   // initialization    
   float xdelta,ydelta,disinf2,wsum,usum,xx,yy;
   float **data;
   float data_ave, sum;
   int i,j,k,count;
    
   // PyObject(python-C API) related 
   PyArrayObject *p_us, *p_rlats, *p_rlons, *p_result;
   double *array_us, *array_rlats, *array_rlons, *array_result;

   p_us= (PyArrayObject *) us;
   p_rlats= (PyArrayObject *) rlats;
   p_rlons= (PyArrayObject *) rlons;
   p_result= (PyArrayObject *) result;
   
   if ( nst != p_us->dimensions[0])
       return;

   array_us = (double*) p_us->data;
   array_rlats = (double*) p_rlats->data;
   array_rlons = (double*) p_rlons->data;
   array_result = (double*) p_result->data;
   
   // find out data avg
   sum=0;
   count=0;
   for (i=0;i<nst;i++)
   { 
       if (array_us[i]>spv)
       {
           sum+=array_us[i];
           count++;
       }
   }
   if (count!=0)
       data_ave= sum / count;

   xdelta = (elon - slon)/(nx -1);  
   ydelta = (elat- slat)/(ny -1);
   disinf2 = pow(disinf,2);

   for( i = 0; i < ny; i++)
   {
        for( j = 0; j < nx; j++)
        {
             wsum = 0.;
             usum = 0.;
             xx = slon + j*xdelta;
             yy = slat + i*ydelta;
             
             for( k = 0; k < nst; k++)
             {
                  if( array_us[k] <= spv )
                      continue;
                  
                  //ardist just a function that calculates distance between
2 points
                  float adist = ardist(array_rlons[k],array_rlats[k],xx,yy);
                  if( adist > disinf )
                      continue;
                  float adist2 =  pow(adist,2);
                  float w = (disinf2 - adist2)/(disinf2+adist2);
                 
                  wsum = wsum + w;
                  usum = usum + (w*array_us[k]);       
             }
             if( wsum != 0 )
                 //data[i][j] = usum/wsum;
                 array_result[i*nx+j] = usum/wsum;
             else
                 //data[i][j] = data_ave;
                 array_result[i*nx+j] = data_ave;
             
        }
   }
   return result;       
}
[/code]

Attachment B  - SWIG interface
[code]
 /* objmod.i */
 %module objmod
 %{
 /* Put header files here or function declarations like below */
 PyObject* cressman(int nx,int ny,PyObject* result,PyObject* us,
                     PyObject* rlats,PyObject* rlons,int nst,float disinf,
                     float slon,float elon,float slat,float elat);
 float ardist(float rlon,float rlat,float xx,float yy);
 %}
 
 extern PyObject* cressman(int nx,int ny,PyObject* result,PyObject* us,
                            PyObject* rlats,PyObject* rlons,int nst,float
disinf,
                            float slon,float elon,float slat,float elat);
 extern float ardist(float rlon,float rlat,float xx,float yy);
[/code]

-- 
View this message in context: http://www.nabble.com/Python-C-API%2C-Numeric-Python%2C-Type-Conversion-tf4222760.html#a12012369
Sent from the Python - python-list mailing list archive at Nabble.com.



From steve at holdenweb.com  Wed Aug  1 06:56:36 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 01 Aug 2007 06:56:36 -0400
Subject: Python end of file marker similar to perl's __END__
In-Reply-To: <46b023ee$0$6528$9b622d9e@news.freenet.de>
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>	<1185947061.985093.306840@22g2000hsm.googlegroups.com>
	<46b023ee$0$6528$9b622d9e@news.freenet.de>
Message-ID: <f8pot4$9v5$2@sea.gmane.org>

Stargaming wrote:
> On Wed, 01 Aug 2007 05:44:21 +0000, Michele Simionato wrote:
> 
>> On Aug 1, 5:53 am, beginner <zyzhu2... at gmail.com> wrote:
>>> Hi All,
>>>
>>> This is just a very simple question about a python trick.
>>>
>>> In perl, I can write __END__ in a file and the perl interpreter will
>>> ignore everything below that line. This is very handy when testing my
>>> program. Does python have something similar?
>> I wished from something like that. What you can do at the moment, is to
>> comment or triple quote the code you don't want to run.
> 
> Or, if in a function body, you could insert a `return` statement. When in 
> top-level code, invoking `sys.exit` (or exit/quit) can do the trick. A 
> ``raise Exception`` might help, too, but could be kinda distracting 
> sometimes.
> 
> So, there is no general purpose solution as perl has it (I guess that 
> __END__ works everywhere at least), rather different solutions for 
> different cases.

I think you have missed the point. A return statement or call to 
sys.exit() doesn't remove the requirement that the rest ofthe source 
file be legal Python. In a Perl program you can put anything you like 
after __END__.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From horpner at yahoo.com  Thu Aug  2 09:08:41 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 02 Aug 2007 13:08:41 GMT
Subject: Python end of file marker similar to perl's __END__
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
	<1185976656.753817.27980@x40g2000prg.googlegroups.com>
	<slrnfb17m5.224.horpner@FIAD06.norwich.edu>
	<eml6o4-tvd.ln1@lairds.us>
	<qv2si.37263$G23.1227@newsreading01.news.tds.net>
	<f8s750$b0m$1@wake.carmen.se>
Message-ID: <slrnfb3ljb.pg.horpner@FIAD06.norwich.edu>

On 2007-08-02, Magnus Lycka <lycka at carmen.se> wrote:
> Neil Cerutti wrote:
>> On 2007-08-01, Cameron Laird <claird at lairds.us> wrote:	.
>>> I want to re-emphasize the "triple-quote it" tip mentioned
>>> earlier in this thread.  I think the original questioner
>>> will find this quite satisfying, if I understand his situ-
>>> ation at all.
>>>
>>> *I* certainly have source code with embedded "junk" 
>>> commented out as multi-line strings.
>> 
>> I used to do that, but now that I use doctests so much it's
>> infeasible to comment out arbitrary code that way, since they
>> can't necessarily nest.
>
> If you consistently use e.g. ''' for doc strings, you can use
> """ to comment out code blocks.

But then I couldn't use """ in my docstrings! ;) Actually, I
wound up converting all my multiline doctests to use
concatenation instead, since they were ruining my syntax
highlighting performance in Vim.

-- 
Neil Cerutti
We shall reach greater and greater platitudes of achievement. --Richard J.
Daley


From dejanews at email.com  Sun Aug 19 08:58:36 2007
From: dejanews at email.com (samwyse)
Date: Sun, 19 Aug 2007 12:58:36 GMT
Subject: Development for dual core machine
In-Reply-To: <1187515287.226791.186700@j4g2000prf.googlegroups.com>
References: <1187515287.226791.186700@j4g2000prf.googlegroups.com>
Message-ID: <08Xxi.28398$RX.5261@newssvr11.news.prodigy.net>

Andy wrote:
> Hi guys,
> 
> I'm sorry, I'm not sure this is the correct group to be asking this
> kind of question...
> 
> I'm going to develop a software package that includes a web server
> (and PHP code) , a database, and some Python code of course.  I am
> being strongly suggested to make it to work on a dual- or multi-core
> computer, but I'm confused on how to take advantage of the multiple
> CPUs.
> 
>>From what I read, I think that simply by making the package run in
> several separate processes (web server, database server, Python
> interpreter, etc.), and/or using multiple threads (which I will
> anyway) the package should be able to use multiple CPUs.
> 
> Is my understanding correct?  So actually, all I have to do is just
> write my multi-threaded Python code as usual?  And how is it decided
> which process and which threads go to CPU 1, CPU 2, etc.?  Perhaps the
> BIOS?
> 
> Any advice greatly appreciated.
> Andy
> 

The Python interpreter is not multi-cpu aware, so using Python threads 
won't work on multiple CPUs.  If your tasks are CPU-bound, then fork 
multiple processes.  Most web servers (Apache) can handle this 
automatically for you.


From steve at holdenweb.com  Mon Aug  6 23:49:52 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Aug 2007 23:49:52 -0400
Subject: Relative-importing *
In-Reply-To: <1186454723.425679.220510@q3g2000prf.googlegroups.com>
References: <1185559874.299008.167010@x40g2000prg.googlegroups.com>	<871weth2gg.fsf@benfinney.id.au>	<pan.2007.07.28.06.17.39.399342@REMOVE.THIS.cybersource.com.au>	<46ae3894$0$19609$426a34cc@news.free.fr>	<1186200218.666444.254200@q3g2000prf.googlegroups.com>	<87vebv9yrr.fsf@benfinney.id.au>	<1186363732.188847.48070@q3g2000prf.googlegroups.com>	<87zm15870h.fsf@benfinney.id.au>
	<1186454723.425679.220510@q3g2000prf.googlegroups.com>
Message-ID: <f98q4v$n9v$1@sea.gmane.org>

rbygscrsepda at gmail.com wrote:
> On Aug 6, 12:19 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>> rbysam... at gmail.com writes:
>>> (In addition, it probably would make the program somewhat slower to
>>> have an internal class inside every module, and performance is
>>> important to me, as I'm planning to use this project in a future
>>> game.
>> This is known as "premature optimisation", and it's harmful. It's
>> folly to avoid a core part of the language because you're worried
>> about hypothetical performance issues.
>>
>> Instead, write your program so that it's easy to understand and
>> maintain; then, if it's noticeably slow, *measure* the performance
>> using profiling so you know exactly what is slow; then, and only then,
>> work on speeding up the slow parts.
>>
>>> These modules are not going to have full-fledged object construction
>>> and so forth. I don't want to construct and use objects at all
>> If that's truly what you desire, you're using the wrong
>> language. Everything inPythonis an object, even if you don't use
>> object-oriented programming.
>>
>>> it seems like a waste of time and memory to me to inherit __new__,
>>> __del__, and so on.
>> You've stated that you're a beginner to programming, so you probably
>> are unaware that this statement has no basis in how class inheritance
>> actually works. The point is that inherited behaviour is implemented
>> in *one* place, not that it's repeated everywhere.
>>
>> Moreover, this is a further expression of your tendency for premature
>> optimisation. You should aim instead to write code naturally (learning
>> what's natural when you're a beginner), and only once you have
>> something that *works* should you think about performance issues.
>>
>>> All that I want these modules to do is to encapsulate varying
>>> information and behavior for /other/ objects to use.)
>> This sounds like an ideal case for seeting up a class hierarchy for
>> this move behaviour.
>>
>>> But regardless of if it's the "right thing to do", do you all think
>>> it's an unintended bug?
>> Do we think what is an unintended bug?
>>
>> I think if you go out of your way to avoid the class inheritance
>> system for implementing what looks strongly like a hierarchy of
>> behaviour, you will have design bugs. Hopefully now that you're
>> reading this thread, they won't be *unintended* bugs; whether you
>> *intentionally* proceed with a buggy design is up to you :-)
>>
>> --
>>  \        "With Lisp or Forth, a master programmer has unlimited power |
>>   `\     and expressiveness. WithPython, even a regular guy can reach |
>> _o__)                            for the stars."  -- Raymond Hettinger |
>> Ben Finney
> 
> I understand what you're saying; thank you for the advice. :) But
> unfortunately, my original question wasn't completely answered.
> 
> I wasn't asking about if my own program had a bug, in the first place.
> I was asking if the error I talked about in the first post was a bug
> in the Python compiler itself. It's undocumented, and so it seems
> unintended--especially since importing * is a feature built in to
> Python on purpose, whether or not it's easily abused or if it's
> useful.
> 
> Here's the error again--whenever you try to import * from a relative
> package like ., .., .sibling, ..cousin, and any other package name
> starting with "*", you get an error.
> 
> Specifically, in Python 1.5, all of the following generate the error
> below:
> 
>     from . import *
>     from .sibiling_package import *
>     from .. import *
>     from ..cousin_package import *
> 
>     SyntaxError: 'import *' not allowed with 'from .'
> 
> Importing * is a feature, but this seems like an artificial
> inconsistency to me. It's as if the compiler raises an error when it
> tries to import * as soon as it sees "from .", regardless of what
> comes after it. So is this a bug in python? And if it happens to be a
> bug, how can I alert the developers of the python compiler?
> 
> Again, thank you! :)
> 

Well, since the error message is quite explicit I think we can rule out 
any thought that the compiler is behaving in an unintended way. In other 
words, it's *not* a bug, but an intentional device to keep the naughty 
such as yourself on the straight and narrow.

There is a quite explicit syntax check in ast.c precisely to exclude the 
possibility of "from ... import *" with relative module names, so you 
are going to have to live with that. It looks like the answer to a 
change request is going to be same as

   from __future__ import braces

which I recommend you try ;-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From aleax at mac.com  Sun Aug 26 01:14:37 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 25 Aug 2007 22:14:37 -0700
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
Message-ID: <1i3f9na.25k9c68wblrkN%aleax@mac.com>

tooru honda <tooru_honda at fast-mail.org> wrote:
   ...
>         def rand2():
>             while True:
>                 randata = urandom(2*1024)
>                 for i in xrange(0, 2*1024, 2):
>                     yield int(hexlify(randata[i:i+2]),16)    # integer
> in [0,65535]

another equivalent possibility, which might probably be faster:

import array
   ...
def rand2():
    while True:
        x = array.array("H")
        x.fromstring(urandom(2*4000))
        for i in x: yield i


Alex


From JHoover at fbi.gov  Tue Aug  7 14:53:01 2007
From: JHoover at fbi.gov (Gordon Airporte)
Date: Tue, 07 Aug 2007 14:53:01 -0400
Subject: Heterogeneous lists
Message-ID: <RPadnXFHmYYUIiXbnZ2dnUVZ_uKpnZ2d@comcast.com>

This is one of those nice, permissive Python features but I was 
wondering how often people actually use lists holding several different 
types of objects.
It looks like whenever I need to group different objects I create a 
class, if only so I can use more meaningful names than '[2]' for the items.
How often do these show up in your code?
Is this simply the upshot of the underlying arrays holding only object 
references of some sort?


From j.spies at hccnet.nl  Sun Aug 19 18:04:40 2007
From: j.spies at hccnet.nl (Jaap Spies)
Date: Mon, 20 Aug 2007 00:04:40 +0200
Subject: Python on Computation, Math and Statistics
In-Reply-To: <m_%xi.34088$2v1.7394@newssvr14.news.prodigy.net>
References: <m_%xi.34088$2v1.7394@newssvr14.news.prodigy.net>
Message-ID: <faaepr$g2v$1@news3.zwoll1.ov.home.nl>

W. Watson wrote:
> I would hope Python is doing a lot of standard computations beyond 
> arithmetic. Trig functions and more. Comments?

Try SAGE: http://www.sagemath.org/

Jaap


Permanents are here forever.


From gagsl-py2 at yahoo.com.ar  Tue Aug 28 01:05:23 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 28 Aug 2007 02:05:23 -0300
Subject: an eval()-like exec()
References: <1188241165.418263.165730@k79g2000hse.googlegroups.com>
Message-ID: <op.txq629lxx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 27 Aug 2007 15:59:25 -0300, Abel Daniel <abli at freemail.hu>  
escribi?:

> Hi!
>
> A python interactive interpreter works by having the user type in some
> code, compiling and running that code, then printing the results. For
> printing, the results are turned into strings.

This last stage is done by calling sys.displayhook - you can replace that  
function with your own one, and get the object to be printed.
Any of your previous attempts (using compile(...,"single")+eval, using  
exec, or creating your own code.InteractiveInterpreter) should work with  
this.

-- 
Gabriel Genellina



From oliver.andrich at gmail.com  Sun Aug 19 13:44:46 2007
From: oliver.andrich at gmail.com (oliver.andrich at gmail.com)
Date: Sun, 19 Aug 2007 17:44:46 -0000
Subject: ctypes and unsigned char*
Message-ID: <1187545486.797017.308720@a39g2000hsc.googlegroups.com>

Hi,

can anybody with ctypes experience tell me, how to handle a C function
that returns an unsigned char*? Obviously it is not a restype of
c_char_p.

Best regards,
Oliver



From cjankowski at hbr-inc.com  Mon Aug  6 15:20:09 2007
From: cjankowski at hbr-inc.com (cjankowski at hbr-inc.com)
Date: Mon, 06 Aug 2007 12:20:09 -0700
Subject: Any Good Book To Start ?
In-Reply-To: <1186427734.352753.183520@z24g2000prh.googlegroups.com>
References: <1186426924.388898.224310@l70g2000hse.googlegroups.com>
	<1186427734.352753.183520@z24g2000prh.googlegroups.com>
Message-ID: <1186428009.574472.160460@e9g2000prf.googlegroups.com>

On Aug 6, 3:15 pm, kyoso... at gmail.com wrote:
> On Aug 6, 2:02 pm, Katie Tam <katie... at gmail.com> wrote:
>
> > Please let me know any good book to start ? Thank You
>
> > Katie Tam
> > CCNP, CCDP
> > LinkWaves Corporation
> > **Leading Provider of Cisco Equipment**http://www.linkwaves.com
>
> To start learning Python or what?
>
> "Python Programming 3rd Ed." by Lutz is good for learning deeper
> concepts in Python, but is probably better suited for experienced
> programmers. I still recommend it though, as it has lots of case
> studies and cool examples.
>
> "Python for Dummies" gives a good overview of Python for a complete
> n00b. There are many other beginner Python books, most of which are
> pretty nice, but not equal in quality.
>
> Mike

I like "Learning Python" by Lutz & Ascher (O'Reilly), very good for
beginners.

Chris



From http  Fri Aug  3 21:36:40 2007
From: http (Paul Rubin)
Date: 03 Aug 2007 18:36:40 -0700
Subject: How to pass a reference to the current module
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<mailman.1597.1186189477.22759.python-list@python.org>
	<f90ktr$hic$1@zinnia.noc.ucla.edu>
Message-ID: <7x4pjgjd1z.fsf@ruckus.brouhaha.com>

James Stroud <jstroud at mbi.ucla.edu> writes:
> > please describe less abstractly what you're trying to do.
> You sound like my former thesis adviser.

I couldn't understand what you were trying to do either.

> OK. From an external source, such as configuration file, the user will
> specify the *name* of a function somehow with the assumption that the
> function will be coded somewhere (in the present or other modules) by
> that name.

Is something wrong with 

   import some_module
   func = getattr(some_module, func_name)

?


From ca.allen at gmail.com  Wed Aug 29 15:47:15 2007
From: ca.allen at gmail.com (Chris Allen)
Date: Wed, 29 Aug 2007 12:47:15 -0700
Subject: sys.argv is munging my command line options
In-Reply-To: <1188415680.744407.21190@r34g2000hsd.googlegroups.com>
References: <1188414714.645724.63330@i38g2000prf.googlegroups.com>
	<1188415680.744407.21190@r34g2000hsd.googlegroups.com>
Message-ID: <1188416835.325173.14310@q4g2000prc.googlegroups.com>

Thanks for the reply. Oops...  I forget that I was calling the program
from a shell script, the shell script was responsible for goofing up
my command line options.  Solved.  Thanks again.


On Aug 29, 12:28 pm, Ant <ant... at gmail.com> wrote:
> On Aug 29, 8:11 pm, Chris Allen <ca.al... at gmail.com> wrote:
> ...
>
> > But I'm running into a problem with this which is that sys.argv splits
> > my key=value options.  I need to know the option associations, and
> > there's no way to know this by inspecting sys.argv.  Can I get access
> > to the command line string as python saw it before it split it into
> > sys.argv or is there another way?  Thanks.
>
> Could you show us some example code that demonstrates this? The
> following works as expected for me on win32:
>
> # test.py
> import sys
>
> for arg in sys.argv[1:]:
>         print arg
>
> >From the command prompt:
>
> C:\0>test.py action key=value key=value
> action
> key=value
> key=value
>
> --
> Ant.




From http  Thu Aug 30 21:41:55 2007
From: http (Paul Rubin)
Date: 30 Aug 2007 18:41:55 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
Message-ID: <7xlkbsmqe4.fsf@ruckus.brouhaha.com>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
> FWIW, the "Eiffel and SPARK Ada folks" also "brilliantly explained"
> why one can not hope to "write reliable programs" without strict
> static declarative type-checking.

I don't know about Eiffel but at least an important subset of SPARK
Ada's DBC stuff is done using static analysis tools (not actually
built into the compiler as it happens) to verify statically
(i.e. without actually running the code) that the code fulfills the
DBC conditions.  I don't see any way to do that with Python
decorators.


From bj_666 at gmx.net  Wed Aug 29 18:16:38 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 29 Aug 2007 22:16:38 GMT
Subject: re compiled object result caching?
References: <1188417101.936530.182480@50g2000hsm.googlegroups.com>
	<mailman.122.1188423947.28954.python-list@python.org>
	<pan.2007.08.29.21.54.50.317879@datallegro.com>
Message-ID: <5jm9i5F6oarU2@mid.uni-berlin.de>

On Wed, 29 Aug 2007 21:54:50 +0000, Dan Stromberg - Datallegro wrote:

> I've long felt that publicly accessible attributes probably should be
> syntactic sugared to look like accessor methods, a bit like how __add__
> ends up being + - so that if your attribute ever needs to become methods
> (say, it started out life as a unidimensional thing, but later needs to
> be a flattening of 3 dimensions or something), you won't necessarily need
> to change depenent code.

Maybe you should read about the `property()` function.

Ciao,
	Marc 'BlackJack' Rintsch


From carsten at uniqsys.com  Fri Aug  3 21:04:18 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 03 Aug 2007 21:04:18 -0400
Subject: How to pass a reference to the current module
In-Reply-To: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
Message-ID: <1186189458.3263.6.camel@localhost.localdomain>

On Fri, 2007-08-03 at 17:22 -0700, James Stroud wrote:
> Hello All,
> 
> Say I have this code:
> 
> 
> import AModule
> import ModuleUser
> 
> ModuleUser.do_something_with(AModule, 'some_function_name')
> 
> 
> But say the functions are defined in the same module that contains the 
> above code. I can imagine this hack:
> 
> 
> import AModule
> import ModuleUser
> 
> ModuleUser.do_something_with(AModule.__name__, 'some_name')
> 
> 
> Where AModule.__name__ could be substituted for __name__ under the 
> proper circumstances. Then, I would have this code in ModuleUser:
> 
> 
> import sys
> def do_something_with(modname, funcname):
>     afunction = sys.modules[modname].funcname
>     [etc.]
> 
> 
> Which is terribly ugly to me and makes for a pretty miserable API in my 
> opinion, requiring the programmer to type underscores.
> 
> 
> Basically, what I am trying to acomplish is to be able to do this in any 
> arbitrary module or __main__:
> 
> 
> funcname = determined_externally()
> ModuleUser.do_something_with(AModule, funcname)
> 
> 
> Ideally, it would be nice to leave out AModule if the functions were 
> designed in the same namespace in which do_something_with is called.
> 
> Thanks in advance for any suggestions.

I can't be too sure because you may have abstracted away too much of
what you're actually trying to accomplish, but it seems to me that
instead of passing a reference to the current module and a function
name, you should just pass a reference to the function that you want
do_something_with to call.

If I missed the point of your question, please describe less abstractly
what you're trying to do.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From mcl.office at googlemail.com  Sat Aug 18 18:14:56 2007
From: mcl.office at googlemail.com (mosscliffe)
Date: Sat, 18 Aug 2007 15:14:56 -0700
Subject: Symbolic Link
Message-ID: <1187475296.173269.263080@k79g2000hse.googlegroups.com>

I am trying to create a link to a file, which I can then use in an
HTML page.

The system is Linux on a hosted web service, running python 2.3.
Other than that I have no knowledge of the system.

The link is created OK, but when I try to use it as filename for the
IMG TAG, it does not get displayed.  The page source of the created
page is pointing to the link as temp/test1.jpg

Any ideas ?

srcFile = "temp/test2.jpg"

linkFile = "temp/test1.jpg"

if os.path.islink(linkFile):
    print "Link Exists", nl
    pass
else:
    print "Making Link", nl
    os.symlink(srcFile, linkFile)

print '<BR><img src="%s">the image</IMG><BR><BR>' % linkFile

print '<img src="%s">the image</IMG>' % srcFile



From CarpeSkium at gmail.com  Fri Aug 17 14:02:17 2007
From: CarpeSkium at gmail.com (CarpeSkium at gmail.com)
Date: Fri, 17 Aug 2007 18:02:17 -0000
Subject: question
Message-ID: <1187373737.410546.70930@w3g2000hsg.googlegroups.com>

"I've parsed a webpage into a text file. In doing so, I've kept all
the text I'm interested in, and removed all the text I don't want. My
result is a text file that is comma-separated. However, the text file
is one, very long, single string. I need to substitute every eighth
(8th) comma with a new line ("\n"). I've tried regular expressions,
but don't know how to make this happen on only every eighth comma. I'd
post my code, but none of it works. Thanks for the help."



From martin.marcher at gmail.com  Thu Aug 30 11:19:04 2007
From: martin.marcher at gmail.com (Martin Marcher)
Date: Thu, 30 Aug 2007 17:19:04 +0200
Subject: We need PIGs :)
In-Reply-To: <5jn92hFdmbcU2@mid.uni-berlin.de>
References: <mailman.131.1188450658.28954.python-list@python.org>
	<5jn92hFdmbcU2@mid.uni-berlin.de>
Message-ID: <db90db6e0708300819h2495ded1w47c62873e80fbf96@mail.gmail.com>

Hello,

On 30 Aug 2007 07:14:25 GMT, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> On Thu, 30 Aug 2007 07:10:47 +0200, Martin Marcher wrote:
>
> > Does that sound like a good idea or would that be over formalization?
>
> Sounds like over engineering/formalization to me.
> You are aware of the Python Enhancement Proposals (PEPs)?

Yes I am thought I mentioned the wsgi pep in the mail...

> Is something like the `Python Database API Specification v2.0`_ or `API
> for Block Encryption Algorithms v1.0`_ what you are looking for?

http://en.wikipedia.org/wiki/Java_Authentication_and_Authorization_Service
http://en.wikipedia.org/wiki/Content_repository_API_for_Java
http://jcp.org/en/jsr/all

But since python is much more open in these terms these hints should
guide developers thru solutions so that they know they can use other
modules/classes without any effort if such a specificaton exists. In
Java it is more like not implementing any of these things is

>
> .. _API for Block Encryption Algorithms v1.0:
>         http://www.python.org/dev/peps/pep-0272/
> .. _Python Database API Specification v2.0:
>         http://www.python.org/dev/peps/pep-0249/

Indeed i wasn't aware of these (I know the wsgi spec) but I was more
thinking about guidelines where you can be quite sure that because of
not being able to provide an implementation that is so general that it
could be incorporated in the standard library.

Think of

* object relational mappers (probably a bad example - but would be still nice)
* service registries
* service repositories
* ....

that use the same interface so that you can swap them effordlessly.
I'm thinking big here so that generalization has to be applied to the
problems but also that you can keep to well known interface to
implement so that it will work out for the majority of situations in
these fields.

I do know the WSGI spec but I do think that (otherwise I wouldn't have
had the idea) that PEPs are the wrong place for that. To me PEPs are
(better should be) about the plain stock standard library and how to
work with it (coding guidelines, docstring, iterators, generators -
specification of the language) PIGs (given the name is arguable - I
just like it it removes a bit of the necessary formal taste it has)
should define:

* problem
* solution
* expected behaviour
* interface

(probably even prepare unit tests if the interface is stabilized)

but should by itself not implement anything as for example the DBAPI
does. and given the nature of the field (spezialized for a task but
still applies to a lot of people) an general purpose implementation
wouldn't be useful

hope that explains it well enough. I've been in a couple of projects
where problems where common to all those projects but the
specification made up by individual (project) managers made it
impossible to reuse parts of other apps (and I guess with some
"official" backup one could point back on proven recipies - that's
probably the term that describes it best)

greetings (always wondered is that a formal or informal closing part
in english letters?)
martin


From zyzhu2000 at gmail.com  Wed Aug  1 12:24:03 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Wed, 01 Aug 2007 16:24:03 -0000
Subject: Assertion in list comprehension
In-Reply-To: <1185984540.245193.270110@i13g2000prf.googlegroups.com>
References: <1185982643.001546.138180@e16g2000pri.googlegroups.com>
	<1185984540.245193.270110@i13g2000prf.googlegroups.com>
Message-ID: <1185985443.357632.6410@d30g2000prg.googlegroups.com>

On Aug 1, 11:09 am, "danmcle... at yahoo.com" <danmcle... at yahoo.com>
wrote:
> On Aug 1, 9:37 am, beginner <zyzhu2... at gmail.com> wrote:
>
>
>
>
>
> > Hi,
>
> > Does anyone know how to put an assertion in list comprehension? I have
> > the following list comprehension, but I want to use an assertion to
> > check the contents of rec_stdl. I ended up using another loop which
> > essentially duplicates the functions of list comprehension. It just
> > look like a waste of coding and computer time to me.
>
> > I just wish I could put the assertions into list comprehensions.
>
> >         x=[(rec_stdl[0].st/10000.0,
> >             rec_stdl[0].cl,
> >             rec_stdl[0].bb,
> >             rec_stdl[0].bo,
> >             rec_stdl[1].bb,
> >             rec_stdl[1].bo,
> >             rec_stdl[0].ex
> >            )
> >            for rec_stdl in rec_by_ex if len(rec_stdl)==2
> >         ]
>
> >         #duplicated loop
> >         if __debug__:
> >             for rec_stdl in rec_by_ex:
> >                 l=len(rec_stdl)
> >                 assert(l<=2 and l>0)
> >                 if l==2:
> >                     assert(rec_stdl[0].c=="C" and rec_stdl[1].c=="P")
> >                     assert(rec_stdl[0].ex==rec_stdl[1].ex)
> >                     assert(rec_stdl[0].st==rec_stdl[1].st)
> >                     assert(rec_stdl[0].cp==rec_stdl[1].cp)
>
> > Thanks,
> > Geoffrey
>
> Can't you just call a function from within your list comprehension and
> do whatever you want for each item? Something like this (not tested):
>
> def checker(item):
>     assert(len(item) <= 2 and len(item) > 0)
>     if len(item) == 2:
>         assert(item[0].c == "C" and item[1].c == "P"
>
>     return len(item) == 2
>
> x = [whatever for item in all_items if checker(item = item)]- Hide quoted text -
>
> - Show quoted text -

Good idea! Thank you!



From goldtech at worldpost.com  Sat Aug 11 18:48:26 2007
From: goldtech at worldpost.com (goldtech)
Date: Sat, 11 Aug 2007 22:48:26 -0000
Subject: C++ Runtime Library error message - Pythonwin?
Message-ID: <1186872506.132154.61610@x35g2000prf.googlegroups.com>


Hi,

Doing GIS [Geographic Information Systems] scripts.

I was running a batch clip script that worked OK for 126 iterations
 then I got the following message:

"Microsoft Visual C++ Runtime Library

program: C:\python21\pythonwin\pythonwin.exe

This application has requested the runtime to terminate in an unusual
 way. Please contact the applications support team for more
information."


What does this mean? Using XP. Is there a log on my system that gives
more info?

Thanks



From jstroud at mbi.ucla.edu  Thu Aug 16 19:53:30 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 16 Aug 2007 16:53:30 -0700
Subject: Cancelling events on a COM Object
In-Reply-To: <bF3xi.1834$4w7.1163@newssvr22.news.prodigy.net>
References: <bF3xi.1834$4w7.1163@newssvr22.news.prodigy.net>
Message-ID: <fa2o1q$8st$1@zinnia.noc.ucla.edu>

Oliver, wait a while before you panic about your post not getting through!

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From aleax at mac.com  Mon Aug 20 11:43:50 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 20 Aug 2007 08:43:50 -0700
Subject: yet another indentation proposal
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
	<1187591109.948771.144690@g4g2000hsf.googlegroups.com>
Message-ID: <1i34y7s.l9m7j5jogddN%aleax@mac.com>

Jakub Stolarski <jakub.stolarski at gmail.com> wrote:

> Why not just use comments and some filter. Just write # _{ at the
> beginning and # _} at the end. Then filter just before runing
> indenting with those control sequences? Then there's no need to change
> interpreter.

As I pointed out in another post to this thread, that's essentially what
Tools/scripts/pindent.py (part of the Python source distribution) does
(no need to comment the beginning of a block since it's always a colon
followed by newline; block-end comments in pindent.py are more
informative).  Just use and/or adapt that...


Alex


From bdesth.quelquechose at free.quelquepart.fr  Mon Aug 20 13:51:00 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 20 Aug 2007 19:51:00 +0200
Subject: desperately in need of a tool
In-Reply-To: <1187560418.339131.283470@i38g2000prf.googlegroups.com>
References: <1187560418.339131.283470@i38g2000prf.googlegroups.com>
Message-ID: <46cca95c$0$431$426a34cc@news.free.fr>

yagyala a ?crit :
> Hi.
> 
> I recently started working for a company that has just implemented its
> first set of software standards. So far, so good. Here's the problem:
> one of those standards is that the comments for each routine must
> indicate every other routine that it calls.

May I suggest that this is a totally *stupid* (and FWIW, totally 
impossible to apply) "standard" ?

Consider the following code, which is  totally dumb but quite close to 
real-life code in it's design (use of polymorphic dispatch, HOFs and 
anonymous functions...) :

def some_func(obj, callback):
   return callback(obj.method())

class One(object):
   def method(self):
     return 42

class Two(object):
   def __init__(self, val):
     self.val = val
   def method(self):
     return self.val / 3


def cb_one(val):
   return val + 2

def cb_two(val):
   return val * 3 + 42


arg_pairs = [(One(), cb_one),
              (One(), cb_two),
              (Two(33), cb_one),
              (Two(99), cb_two)
              (One(), lambda x: x ** 2]

for obj, cb in arg_pairs:
   print some_func(obj, cb)

How are you going to list the functions called by some_func ???

(snip)

> I'm sure some will wonder about the reasoning of this standard.

Indeed !-)

> The
> company primarily has experience writing scientific alogorythms which
> can get rather long. It makes a bit more sense to document all
> routines called for a very long routine, but for short routines that
> primarily call other routines, as most mine do, well....

Show the above code to your PHB and ask him to explain how you're going 
to apply the "standard"...



From a.schmolck at gmail.com  Mon Aug 13 13:46:19 2007
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: Mon, 13 Aug 2007 18:46:19 +0100
Subject: decorators - more than just syntactic sugar
References: <46be005e$0$13866$ba620e4c@news.skynet.be>
	<1186985383.303334.110230@19g2000hsx.googlegroups.com>
Message-ID: <yfszm0v49as.fsf@gmail.com>

Michele Simionato <michele.simionato at gmail.com> writes:

> On Aug 11, 8:30 pm, Helmut Jarausch <jarau... at skynet.be> wrote:
>> Hi,
>>
>> are decorators more than just syntactic sugar in python 2.x and what
>> about python 3k ?
>
> Well, I argued may times that syntactic sugar is important (all Turing
> complete languages differs by syntactic sugar only)

Although I agree that "mere" syntactic sugar matters, I think you're
overstating the point. I would argue that most people would understand
syntactic sugar as equivalent to a (very) localized program transformation.
Things like first class continuations clearly aren't syntactic sugar in that
sense.



'as


From kay.schluehr at gmx.net  Mon Aug 13 02:27:14 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sun, 12 Aug 2007 23:27:14 -0700
Subject: decorators - more than just syntactic sugar
In-Reply-To: <46be005e$0$13866$ba620e4c@news.skynet.be>
References: <46be005e$0$13866$ba620e4c@news.skynet.be>
Message-ID: <1186986434.625285.143920@19g2000hsx.googlegroups.com>

On Aug 11, 8:30 pm, Helmut Jarausch <jarau... at skynet.be> wrote:

> How can I find out the predefined decorators?

I dare to say that's not easy. Since decorators are just(?)
syntactical sugar they don't obtain a particular semantics expressed
by distinctive declarative elements. Unlike generators which can be
identified looking for a yield expression a decorator can be
identified syntactically just when it is used. However this might be
sufficient, depending on your intention?



From Graham.Dumpleton at gmail.com  Sat Aug 18 03:31:20 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Sat, 18 Aug 2007 07:31:20 -0000
Subject: Overriding Thread.join in derived class.
Message-ID: <1187422280.018913.184990@q3g2000prf.googlegroups.com>

If one creates a thread using threading.Thread and makes it a daemon
by calling setDaemon(), then when Python is exiting it will not
attempt to call join() on that thread and wait for it to complete
first.

The problem with this is that the daemonised thread will continue to
run while atexit register callbacks are being called and while Python
is being subsequently destroyed

The result is that the daemonised thread may access application
components that have been cleaned up and in the worst case as Python
progresses with destroying interpreters it could try accessing things
like sys.modules which may no longer exist.

End result is that it could result in a Python exception at some
point, evidenced by messages starting with:

Exception in thread Thread-1 (most likely raised during interpreter
shutdown)

or:

Unhandled exception in thread started by <bound method
Thread.__bootstrap of <Thread(Thread-1, started daemon)>>

In order to avoid this, do people think that as an alternative to
creating daemonised thread that it would be reasonable to create a
derived Thread class for the particular task which overrides
Thread.join() method to set some flag or otherwise take some action
that the thread would notice to tell it to stop, and then call base
class Thread.join().

This way you can flag the thread to shutdown automatically when Python
is going around calling join() on non daemonised threads.

Or am I missing the obvious as far as ways of flagging threads to tell
them to stop?

Note that this is where Python is being used embedded in a C program.
There is no Python main function where code can be put to signal
threads to otherwise stop.

Graham



From Robert.R.Emmel at gmail.com  Thu Aug 30 12:53:01 2007
From: Robert.R.Emmel at gmail.com (Robert.R.Emmel at gmail.com)
Date: Thu, 30 Aug 2007 09:53:01 -0700
Subject: Python threading
Message-ID: <1188492781.894079.153260@r23g2000prd.googlegroups.com>

Hello,

I am using the threading module and the Queue module in python to to
send out shipment tracking URL requests.

Is there a way to timeout a thread within a Queue?

I think the way I have it now the thread will wait until something is
returned and will basically wait forever for that something.

Between the waiting for something to be returned and the timeouts on
the database connections, the program appears to just hang like it has
stopped working. Any suggestions?

Here is a sample of code I am using (left out some of the code for
brevity):

import urllib
from HTMLParser import HTMLParser
import threading
import Queue

NTHREADS = 100

...

def Web_Retrieve(inpque, outqueue):
    N = 1
    try:
        connection = MySQLdb.connect(host="hostname", port=3306,
user="username", passwd="password", db="Mydatabase")
        print "t" + str(N)+ " - Database Connection Established !!"
        cursor = connection.cursor()
    except MySQLdb.OperationalError, message:
        errorMessage = "t" + str(N)+ " -Error %d:\n%s" % (message[0],
message[1])
    else:

        DBRow = inpque.get()
        while not (DBRow[0] == ''):
            PNum = DBRow[1]
            PNum = RemoveHyphens(RemoveSpaces(PNum))
            print "t" + str(N)+ " -PNum : " + PNum
...
                # Setup URL to retrieve status web page depending on
Carrier SCAC
                    if SCAC == "RDWY":
                        pURL = "http://www.quiktrak.roadway.com/cgi-
bin/quiktrak?"
                        bURL = "&pro0=" + PNum

                        if DEBUG > 90 or (DEBUG > 30 and DEBUG < 40):
                            print "t" + str(N)+ " -URL: ", pURL +
bURL
                        WURL = pURL + bURL

                        # Retrieve status web page, assign it to a
variable and close connection
                        try:
                            f = urllib.urlopen(pURL+bURL)
                            s = f.read()
                            f.close()
                        except IOError, e:
                            print 't' + str(N)+ ' -I/O Error:
',e.strerror
 ##                           continue

...

                outqueue.put((PR, s, WURL, s12))
                DBRow = inpque.get()
                N = N+ 1
        outqueue.put(None)
        cursor.close()
        connection.commit()
        connection.close()
        print "t" + str(N)+ " -Database Closed"

## Main processing file.
def WebProcess(Mode):
    ## Get file listing from the proper directory depending on mode
    if Mode == 'B':
        IFilenames = os.listdir(os.curdir+os.sep+'Input')
        NTHREADS = 100
...

    # Open connection to MySql
    try:
        connection = MySQLdb.connect(host="hostname", port=3306,
user="username", passwd="password", db="mydatabase")
        print "Database Connection Established !!"
        cursor = connection.cursor()
    except MySQLdb.OperationalError, message:
        errorMessage = "Error %d:\n%s" % (message[0], message[1])
    else:


        inputs = Queue.Queue(0)
        results = Queue.Queue(0)
        thread_pool = []

        for ii in range(NTHREADS):
            thread = threading.Thread(target=Web_Retrieve,
args=(inputs, results))
            thread.start()
            thread_pool.append(thread)

        ## Retrieve BOL's from Database for web retrieval
        print "Current Mode is : ", Mode
        print "Length of Mode string is : ", len(Mode)
        Mode_results = cursor.execute( "Select * from bol_table where
Mode = %s and (Expired IS NULL or Expired IS False);", (Mode.strip()))
        print "Mode Query Results: ", Mode_results
        if Mode_results > 0:
            print " Do Web Page lookups !!! "
            DBRows = cursor.fetchall()
            for DBRow in DBRows:
                inputs.put(DBRow)

            for ii in range(len(DBRows)):
                PR, s, WURL, s12 = results.get()
##                print "PR is : "+PR+" S's first 100 char's are
"+s[0:100]+" WURL is : "+WURL
                print
"+-------------------------------------------------------------+"
                print "PR is : " + PR
                print "s is (First 100) : " + s[0:100]
                print "WURL is : " + WURL
                print "s12 is : " + s12
                print
"+-------------------------------------------------------------+"

....

## Clear out thread pool

            for thread in thread_pool:
                inputs.put(('',''))

....


For the times I have run into the "<scr" + "ipt>" on web pages I take
the f.read() string s and pass it to this function:

## fix webpages that have the 'scr' + 'ipt' split on them.
def fixscript(x):
    SQ = 0
    EQ = 0
##    if DEBUG > 90:
##        print "fixscript length of x: ", len(x)
    while True:
        SQ = x.find('scr" + "ipt', SQ + 12)
##        if DEBUG > 90:
##            print "SQ : ", SQ
        if SQ <= 0:
            break
        x = x[0:SQ + 3] + x[SQ + 8:]
    return x

Just passing this along to those who have run into this problem when
parsing a web page.



From jstroud at mbi.ucla.edu  Sun Aug 19 04:27:46 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 19 Aug 2007 08:27:46 GMT
Subject: Understanding closures
In-Reply-To: <1187499818.125192.12930@m37g2000prh.googlegroups.com>
References: <1187499818.125192.12930@m37g2000prh.googlegroups.com>
Message-ID: <6aTxi.9264$3x.2221@newssvr25.news.prodigy.net>

Ramashish Baranwal wrote:
> Hi,
> 
> I want to use variables passed to a function in an inner defined
> function. Something like-
> 
> def fun1(method=None):
>     def fun2():
>         if not method: method = 'GET'
>         print '%s: this is fun2' % method
>         return
>     fun2()
> 
> fun1()
> 
> However I get this error-
> UnboundLocalError: local variable 'method' referenced before
> assignment
> 
> This however works fine.
> 
> def fun1(method=None):
>     if not method: method = 'GET'
>     def fun2():
>         print '%s: this is fun2' % method
>         return
>     fun2()
> 
> fun1()
> 
> Is there a simple way I can pass on the variables passed to the outer
> function to the inner one without having to use or refer them in the
> outer function?

Why do you have this latter requirement? Will /method/ change in the 
outer scope before it is called in the inner scope? E.g.:


def fun1(method=None):
     def fun2():
         if not method: method = 'GET'
         print '%s: this is fun2' % method
         return
     method = 'POST'
     # Now its going to be 'POST' in fun2
     fun2()


To avoid this problem, you want something like this:


def fun1(method=None):
     def fun2(method=method):
         if not method: method = 'GET'
         print '%s: this is fun2' % method
         return
     method = 'POST'
     # Now the preceding line has no effect on fun2
     fun2()
     # Now method is explicitly 'POST' in fun2
     fun2('POST')


But a deeper question is: Why do you need to define fun2 with fun1 to 
begin with?


def fun2(method=None):
   if not method: method = 'GET'
   print '%s: this is fun2' % method
   return

def fun1(method=None):
   method = 'POST'
   # will be 'GET'
   fun2()
   # will be 'POST'
   fun2(method)


Also, empty "return" statements are unnecessary if they are the last 
statement in a function.

James


From bj_666 at gmx.net  Thu Aug 30 03:14:25 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 Aug 2007 07:14:25 GMT
Subject: We need PIGs :)
References: <mailman.131.1188450658.28954.python-list@python.org>
Message-ID: <5jn92hFdmbcU2@mid.uni-berlin.de>

On Thu, 30 Aug 2007 07:10:47 +0200, Martin Marcher wrote:

> Does that sound like a good idea or would that be over formalization?

Sounds like over engineering/formalization to me.

You are aware of the Python Enhancement Proposals (PEPs)?

Is something like the `Python Database API Specification v2.0`_ or `API
for Block Encryption Algorithms v1.0`_ what you are looking for?

.. _API for Block Encryption Algorithms v1.0:
        http://www.python.org/dev/peps/pep-0272/
.. _Python Database API Specification v2.0:
        http://www.python.org/dev/peps/pep-0249/

Ciao,
	Marc 'BlackJack' Rintsch


From http  Fri Aug 31 06:47:51 2007
From: http (Paul Rubin)
Date: 31 Aug 2007 03:47:51 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<1188537516.622167.115080@z24g2000prh.googlegroups.com>
	<mailman.192.1188556734.28954.python-list@python.org>
Message-ID: <7xir6wc754.fsf@ruckus.brouhaha.com>

Ricardo Ar?oz <ricaraoz at gmail.com> writes:
> In that case why don't we just 'certify to a higher level' the programs
> and get done with this formal proofs? We should remember that the level
> of security of a 'System' is the same as the level of security of it's
> weakest component, so either we formally prove all those other very
> important components (OS gets MUCH more use than the program (the
> program uses it for almost every other action)) or get done with the
> whole fuss.

This url has some info on the topic of certification etc.:

http://www.dwheeler.com/essays/high-assurance-floss.html



From jeff.fw at gmail.com  Wed Aug 29 00:07:40 2007
From: jeff.fw at gmail.com (Jeff)
Date: Wed, 29 Aug 2007 04:07:40 -0000
Subject: Creating a multi-tier client/server application
Message-ID: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>

Hello everyone.  I've searched through the archives here, and it seems
that questions similar to this one have come up in the past, but I was
hoping that I could pick your Pythonic brains a bit.

Here's a broad overview of what I need to do:  cross-platform, client-
side GUI apps that interact with a server backed by a database.  I'd
also like the possibility of having a web interface for small portions
of the app.  It will be a fairly complex system for managing personnel
(and training, performance reviews, etc.) and payroll, and I will
probably have about a year or more to write it.

None of this is written yet--actually, it's not even to the point of
specs yet, I'm just trying to learn the best way to do this *before* I
get to the specs.  I want to plan this application out as thoroughly
as possible before writing any code, and I want to do it The Right
Way(TM), hence I have (hopefully) convinced my manager (and clients)
that Python is the way to go.  I have a couple years of experience in
Python, but it's mostly been web apps (which I am thoroughly sick of
making, thanks to PHP) and simple CLI programs.  Not sure if any of
that information helps, but I'm tired, so please bear with me.

The application definitely needs at least three tiers: client, server,
and DB.  I want as little logic in the client as possible (if not
none), as there will be sensitive data in the DB.  I also can't have
the clients connect to the DB directly, as it will need to only accept
connections on the local host.  The client will probably be installed
on 50-100 machines, and will be used by several hundred people (yes,
they're sharing machines--the users will be computer lab consultants/
server operators/helpdesk employees, etc. and their supervisors), so
authentication (using LDAP) and authorization (using groups I will
define) will be very important.  Also important will be automatic
updates of the client, which I figure I'll do by comparing version
numbers, then downloading an archive (egg, maybe?) of the latest
(compiled? byte-?) code.

I will probably make the GUI in wxPython, as that seems to be most
flexible and nicely cross-platform choice--but I am open to
suggestions.  Not too worried about that one, though.

For the database, I'll use Postgres, because I love Postgres.
Probably not going to budge on that one unless anyone has any good
reasons to.  I'd also like to use SQLAlchemy (because it is so nice),
but this is not a requirement (I can write SQL, but... SQLAlchemy is
so nice.)  I'd like to use an ORM mainly because it would facilitate
code reuse for the (very simple) web interface, and other offshoot
tools down the line.

So, my real question (sorry for the all the exposition) is this: how
to do the networking?  I'd really like to have the client send a
simple request to the server along the lines of "fetch this (or these)
object(s)", or "update this value in this object", then let the server
decide if the user actually is allowed to do so, and then make the
change in the database.

My first thought was XML-RPC, because I've used it before, and it is
so nice and clean--but then I can't send objects, which is really
rather crucial.

Then I looked at Pyro, which seems awesome, but I'm confused as to how
(if possible) I would use it with a DB.  Would I have to figure out on
the client what SQL query to send to get the right objects? That would
kind of kill the separation of logic.  And would it work at all with
SQLAlchemy (or any ORM for that matter)?

I looked at SOAP.  It made me feel unclean.  I looked at some CORBA,
at which point my eyes glazed over (possibly not CORBA's fault, I will
look at it again later).

I checked out Twisted, but there are so vastly many parts to it, that
I'm not sure where to even start.

I'm not ruling out writing my own simple protocol, but it seems like
I'd be reinventing a wheel that's already been reinvented countless
times.

So, all that said--any advice on how to do the networking?  And on the
auto-update?  For that matter, any advice on anything I've mentioned
(or haven't?)  Please feel free to ask me to clarify anything, or tell
me if I'm being an idiot about anything.

Thanks,
Jeff



From deets at nospam.web.de  Thu Aug 23 03:02:38 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 23 Aug 2007 09:02:38 +0200
Subject: porting vc++ project to python?
In-Reply-To: <46cc611f$0$25500$ba620dc5@text.nova.planet.nl>
References: <46cc611f$0$25500$ba620dc5@text.nova.planet.nl>
Message-ID: <5j4potF3p8ngaU1@mid.uni-berlin.de>

marco Starglider schrieb:
> hi,
> 
> i have a very large project in visual studio2005->visual c++ in windowsxp.
> i'd like to port it, or my next project,  over to python.
> is this possible without rewriting all my code?
> are there multiple options to do this?
> my project is so large, that entirely rewriting it
> is actually no option.
> 
> regards,
> 
> m
> 
> ps i guess, it's an option to transform my current code into one or more
> python extensions/modules, and then calling them from a python core
> module?

It is. I personally prefer SIP, which is a C++ wrapper generator used to 
wrap the Qt toolkit. But there are other options as well, e.g. SWIG and 
Boost::Python.

Diez


From gherzig at fmed.uba.ar  Thu Aug 30 15:28:22 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Thu, 30 Aug 2007 16:28:22 -0300
Subject: pure python for sms 
Message-ID: <46D71A56.30602@fmed.uba.ar>

Hi dudes. Im looking for a python implementation for sending sms to a 
cell phone. I was try using some free pages, but i want to use a python. 
Do i need a cellphone conected to my machine? Or can i send sms to some 
cell via some python library?

Waiting for advice.
Thanks!

Gerardo


From QJing.Li at gmail.com  Fri Aug 17 13:07:51 2007
From: QJing.Li at gmail.com (math2life)
Date: Fri, 17 Aug 2007 17:07:51 -0000
Subject: help to make program better
In-Reply-To: <1187368051.235289.76520@w3g2000hsg.googlegroups.com>
References: <1187368051.235289.76520@w3g2000hsg.googlegroups.com>
Message-ID: <1187370471.220778.23380@i13g2000prf.googlegroups.com>

On Aug 17, 9:27 am, yadin <conra2... at yahoo.com> wrote:
> hi!
> Can any one tell me why is it that i can't see my second frame and why
> is the value of freq not Appended in the First frame ...thanks
> I know it is wx python  but it has to do with passing variables.thanks
>
> import wx
>
> def create(parent):
>     return Frame1(parent)
>
> [wxID_FRAME1, wxID_FRAME1FREQ, wxID_FRAME1FREQDISP,
> wxID_FRAME1STATICTEXT1,
> ] = [wx.NewId() for _init_ctrls in range(4)]
>
> class Frame1(wx.Frame):
>     def _init_ctrls(self, prnt):
>         # generated method, don't edit
>         wx.Frame.__init__(self, id=wxID_FRAME1, name='', parent=prnt,
>               pos=wx.Point(380, 179), size=wx.Size(241, 133),
>               style=wx.DEFAULT_FRAME_STYLE, title='Frame1')
>         self.SetClientSize(wx.Size(233, 99))
>
>         self.staticText1 = wx.StaticText(id=wxID_FRAME1STATICTEXT1,
>               label='frequency disp', name='staticText1', parent=self,
>               pos=wx.Point(24, 32), size=wx.Size(71, 13), style=0)
>
>         self.freqdisp = wx.TextCtrl(id=wxID_FRAME1FREQDISP,
> name='freqdisp',
>               parent=self, pos=wx.Point(104, 24), size=wx.Size(100,
> 21),
>               style=0, value='')
>
>         self.freq = wx.Button(id=wxID_FRAME1FREQ, label='get freq',
> name='freq',
>               parent=self, pos=wx.Point(24, 56), size=wx.Size(184,
> 23),
>               style=0)
>         self.freq.Bind(wx.EVT_BUTTON, self.OnButton1Button,
> id=wxID_FRAME1FREQ)
>
>     def __init__(self, parent):
>         self._init_ctrls(parent)
>
>     def OnButton1Button(self, event):
>
>         def create(parent):
>             return Frame2(parent)
>         [wxID_FRAME2, wxID_FRAME2FREQ, wxID_FRAME2FREQDISP,
> wxID_FRAME2STATICTEXT1,] = [wx.NewId() for _init_ctrls in range(4)]
>
>         class Frame2:
          ~~~~~~~~~~~~~~~should be class Frame2(wx.Frame):
>             def __init__(self):
>                 #
>                 wx.Frame.__init__(self, id=wxID_FRAME2, name='',
> parent=prt,
>                       pos=wx.Point(400, 179), size=wx.Size(300, 133),
>                       style=wx.DEFAULT_FRAME_STYLE, title='Frame2')
>                 self.SetClientSize(wx.Size(233, 99))
>
>                 self.staticText1 =
> wx.StaticText(id=wxID_FRAME2STATICTEXT1,
>                       label='frequency goes here first',
> name='staticText2', parent=self,
>                       pos=wx.Point(24, 32), size=wx.Size(71, 13),
> style=0)
>
>                 self.freqdisp2 = wx.TextCtrl(id=wxID_FRAME2FREQDISP,
> name='freqdisp2',
>                       parent=self, pos=wx.Point(104, 24),
> size=wx.Size(100, 21),
>                       style=0, value=' ')
>
>                 self.freq = wx.Button(id=wxID_FRAME2FREQ, label='get
> freq', name='freq',
>                       parent=self, pos=wx.Point(24, 56),
> size=wx.Size(184, 23),
>                       style=0)
>                 self.freq.Bind(wx.EVT_BUTTON, self.OnButton2Button,
> id=wxID_FRAME2FREQ)
>
>             def __init__(self, parent):
>                 self._init_ctrls(parent)
>             def OnButton2Button(self, event):
>                 freqdisp.Append('this is it 24HZ!')
>             Show()
               ~~~~~~~~~~~~~~~~~~~~should be create(self).Show()
>
> if __name__ == '__main__':
>     app = wx.PySimpleApp()
>     frame = create(None)
>     frame.Show()
>
>     app.MainLoop()

Hi,
I found two errors in your program.
one is that class Frame2 must be inherited from wx.Frame,
the other is Show() must belong a object.









From lycka at carmen.se  Wed Aug  1 05:26:19 2007
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 01 Aug 2007 11:26:19 +0200
Subject: Where do they tech Python officialy ?
In-Reply-To: <1185274675.038893.71200@d55g2000hsg.googlegroups.com>
References: <1185209574.045112.163780@g4g2000hsf.googlegroups.com>
	<7xveca4ajp.fsf@ruckus.brouhaha.com>
	<1185265091.276958.239910@r34g2000hsd.googlegroups.com>
	<7x8x96fa3q.fsf@ruckus.brouhaha.com>
	<1185274675.038893.71200@d55g2000hsg.googlegroups.com>
Message-ID: <f8pjjr$dag$1@wake.carmen.se>

On July 23, NicolasG wrote:
 > I want to be a professional python programmer...
 > unfortunately sometimes to work as a programmer is really hard in this
 > world, every employee requires professional experience and you can't
 > really start as a beginner..

On July 24, NicolasG wrote:
> Python is what I like, I would love to be more creative with this
> language and be able to produce things that I can't right now..
> Why not try to find a work that you would like ? I don't want to work
> as a programmer to became one because I'm already a programmer, I just
> want to work as a programmer ..

I'm not sure I understand what you mean by "I'm already a programmer"
if you can't get jobs because you're a beginner. That sounds a bit
like "I'm a surgeon, except that I haven't done any surgery just yet."

I also don't understand the concept on choosing a university depending
on whether they use a particular language in their courses. I think it's
a good idea with a good academic education, but whether Python is part
of that is really a minor issue. The most important part of education
for people who are going to work as programmers is advanced mathematics!
That's what will teach you logic and systematic problem solving.

Learning Python is a very small and easy part in learning to develop
software in a professional way. There are no silver bullets. You won't
find a language or a university course that will "fix" things for you.

The world (and your job) is full of problems waiting to be solved.
Solve them with Python, use your spare time if you're ambitious and
don't get the opportunity to use working hours. Use the internet to
find ideas and libraries etc. Doing this will make work more fun, if
you are talented enough it will make you much more productive, you
should be appreciated for the improvements you achieve, and you will
build up a portfolio of software and solutions that you can show a
prospective employer.

If I'm hiring a consultant for a few weeks, prior Python experience
might be an issue, but if I employ someone, I don't care whether they
already know Python. I expect them to know a few languages well.
I assert that they are capable of applying a programming language to
solve problems swiftly and intelligently, and I'm pretty sure they
pick up Python quickly.


From horpner at yahoo.com  Wed Aug  1 12:46:53 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 01 Aug 2007 16:46:53 GMT
Subject: Awkward format string
References: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
	<mailman.1440.1185985928.22759.python-list@python.org>
	<1185986578.527619.314310@e9g2000prf.googlegroups.com>
Message-ID: <1O2si.37265$G23.12306@newsreading01.news.tds.net>

On 2007-08-01, beginner <zyzhu2000 at gmail.com> wrote:
> print  >>f, "%s\t%s\t%d\t%f\t%f\t%f\t%d" %
> (x.field1..strftime("%Y-%m- %d"),
> x.field2..strftime("%Y-%m-%d"), x.field3, x.field4, x.field5,
> x.field.6, x.field7)
>
> This is also tedious and error-prone.

Providing a suitable .str or .__repr__ method for your class
may make that problem disappear.

-- 
Neil Cerutti


From ptmcg at austin.rr.com  Thu Aug 30 09:54:47 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Thu, 30 Aug 2007 06:54:47 -0700
Subject: Important Research Project
In-Reply-To: <13ddcvm1bsu3s94@corp.supernews.com>
References: <13ddcvm1bsu3s94@corp.supernews.com>
Message-ID: <1188482087.098419.56490@k79g2000hse.googlegroups.com>

On Aug 30, 8:12 am, "E.D.G." <edgrs... at ix.netcom.com> wrote:
> Important Research Project  (Related to computer programming)
>
> Posted by E.D.G. on August 30, 2007 edgrs... at ix.netcom.com
>
>     This report is being posted to a number of Internet Newsgroups

Always the hallmark of a considerate poster.

> to see if
> there are any experienced computer programmers who would like to provide
> some assistance with an effort to develop a Perl language computer program.
>
>     Interested parties can try contacting me by e-mail or by posting a
> response note to the comp.lang.perl.misc newsgroup.  They would need to
> download a recent (free) MSI copy of Perl from the ActiveState Web site and
> get it running on a Windows XP or Vista system.
>
> http://www.activestate.com
>

This is a little backwards, one usually presents their research topic
*first* and their contact info *last*.  The reason?  SO PEOPLE KNOW
WHAT THE @#$(&#!@ YOU ARE WORKING ON!  Ok, I'll bite, keep reading...

>     I am presently using Perl 5.8.8

Whoop-de-doo for you.

> but plan to upgrade to the latest
> version as soon as possible.  People can use Windows 98 if that is the only
> operating system available.  Perl also runs on other operating systems.  But
> at this time I specifically need help with the Windows version.
>

I suspect Perl is largely the same Perl on all those platforms.  Win
98?  Is this a zombie spam from the turn of the century?

>     The goal is to have a single Perl program (or modules) perform functions
> that have been done by a sizeable collection of other language programs in
> the past.
>

Doing what!?  Grrr..., keep reading, there's gotta be a punch line...

>     Help is presently needed with learning how to get Perl to generate
> charts and also produce standalone .exe copies of itself.  The plan is to
> then make those .exe copies available to other scientific researchers around
> the world for free use along with free use updates when they become
> available.  If other researchers wish to get Perl running on their own
> computers then they will probably also be given the source code for the
> original program for free use so that they can do their own development
> work.
>

Ohmigod, is Google broken?  Or has Perl gone this long and this far
without support for creating charts and graphs?  Sounds like about 10
minutes of research.

>     Perl was originally chosen because it is quite versatile, is a free
> download, and is supported both by ActiveState and quite a few independent
> programmers.  So other researchers could get their own versions running
> without having to worry about viruses or cost.
>

(Why is this posted on all these non-Perl newsgroups, then?  I've
*seen* Perl already, and never want to again!)

>     So far the work is fairly advanced.  The effort has been underway for at
> least a decade.  

... and we are just getting around to plotting some data.

> The core data generation program was formally copyrighted
> several years ago.  

Red flag #37 - "formally copyrighted", wooo-ooooh

> My present version of Perl will send data to Windows as
> if it were being manually typed into the keyboard (important for controlling
> other programs).  And it can directed to respond to most keystrokes even
> when another program is the active one.  Unfortunately, Windows also
> presently responds to those keystrokes.  And that complicates things a bit.
>

... and has for the past decade, and I still haven't figured it out.

>     Not being a professional computer programmer I have been finding it
> difficult to get new features such as a chart generating ability merged with
> and running with Perl.  And the entire research project is now being slowed
> as a result.  One of my colleagues has done an extensive amount of work with
> Basic.  And I even offered to pay him to help with the Perl development
> effort.  But after he downloaded a copy of Perl and examined it he decided
> that this would involve too much effort.  I have to agree with him.
>

Maybe that up-front language choice could stand a review...

>     Once it is possible to create charts and .exe versions the plan is for
> researchers around the world to develop Perl modules for generating a
> variety of data related to sun, moon, planet, ocean tide crest and trough,
> and Solid Earth Tide locations.  Most of those data can already be generated
> with other programs.  Some of the data are not yet available anywhere as far
> as I am aware.  If the effort is unusually successful the Perl program (or
> modules) might eventually be converted to CGI programs that will run at one
> or more Internet Web sites.

AHHH!  The "research", I almost forgot!  Why is it left to the end of
the message?  And do we still know what the @#(*&$ this "variety of
data" is for?  I'm going to take a wild guess here - earthquake
prediction?  perpetual motion?  picking guaranteed-to-win lottery
numbers?

After a pitch like that, who could not be tempted at the prospect of
"generating a variety of data related to sun, moon, etc. etc."?  Sign
me up - NOT!

GTFA,
-- Paul



From wolf_tracks at invalid.com  Sat Aug 18 11:42:52 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sat, 18 Aug 2007 15:42:52 GMT
Subject: Python and Tkinter Programming--Expensive!
In-Reply-To: <slrnfcdj46.t75.nick@irishsea.home.craig-wood.com>
References: <Xllxi.9066$3x.1781@newssvr25.news.prodigy.net>
	<slrnfcdj46.t75.nick@irishsea.home.craig-wood.com>
Message-ID: <0sExi.33897$2v1.19719@newssvr14.news.prodigy.net>

Thanks. I'll test the waters on Amazon.

Nick Craig-Wood wrote:
> W. Watson <wolf_tracks at invalid.com> wrote:
>>  Why is the book in Subject (author is Grayson) so expensive? $100 on Amazon 
>>  and $195 on ABE. Aren't there alternatives?
> 
> There is an excellent section (266 pages) on TKinter in "Programming
> Python" by Mark Lutz. I've got the 2nd edition.
> 
> Lutz concentrates on TK programming using classes, making re-usable
> components which I found really helpful compared to the ad-hoc way I'd
> seen TK presented previously.
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From arnau at ehas.org  Wed Aug 29 15:59:30 2007
From: arnau at ehas.org (Arnau Sanchez)
Date: Wed, 29 Aug 2007 21:59:30 +0200
Subject: sys.argv is munging my command line options
In-Reply-To: <1188414714.645724.63330@i38g2000prf.googlegroups.com>
References: <1188414714.645724.63330@i38g2000prf.googlegroups.com>
Message-ID: <46D5D022.5010606@ehas.org>

Chris Allen escribi?:

> action key=value key=value...
> 
> Where action is a required string (ie. 'backup', 'init', 'restore',
> etc) and the program can accept one or more key value pairs.  I know
> this syntax isn't standard, but I think it works great for my program
> as each key can override an identically named field in a configuration
> file, that way the user doesn't have to have two different syntaxes to
> do the same thing.  I could do this with --key value

It's ok for a personal script, but if you expect other people to use it, 
you should consider the "Rule of Least Surprise" and follow the standard.

Anyway, using getopt or optparse, it would be "--key=value", or perhaps 
"-o key=value / --option=key=value"

> But I'm running into a problem with this which is that sys.argv splits
> my key=value options.  I need to know the option associations, and
> there's no way to know this by inspecting sys.argv.  Can I get access
> to the command line string as python saw it before it split it into
> sys.argv or is there another way?

I can't see the problem, sys.argv[1:] gives you the list of ordered 
key/value pairs... give an example of what you want and what you get.


From mcl.office at googlemail.com  Thu Aug 30 07:13:51 2007
From: mcl.office at googlemail.com (mcl)
Date: Thu, 30 Aug 2007 04:13:51 -0700
Subject: Unzip: Memory Error
In-Reply-To: <m21wdmgkmh.fsf@valheru.db3l.homeip.net>
References: <1188413939.834662.193180@y42g2000hsy.googlegroups.com>
	<m21wdmgkmh.fsf@valheru.db3l.homeip.net>
Message-ID: <1188472431.290871.103720@o80g2000hse.googlegroups.com>

On 29 Aug, 21:18, David Bolen <db3l.... at gmail.com> wrote:
> mcl <mcl.off... at googlemail.com> writes:
> > I am trying to unzip an 18mb zip containing just a single 200mb file
> > and I get a Memory Error.  When I run the code on a smaller file 1mb
> > zip, 11mb file, it works fine.
> (...)
> > def unzip_file_into_dir(file, dir):
> >    #os.mkdir(dir, 0777)
> >    zfobj = zipfile.ZipFile(file)
> >    for name in zfobj.namelist():
> >            if name.endswith('/'):
> >                    os.mkdir(os.path.join(dir, name))
> >            else:
> >                    outfile = open(os.path.join(dir, name), 'wb')
> >                    outfile.write(zfobj.read(name))
> >                    outfile.close()
>
> The "zfobj.read(name)" call is reading the entire file out of the zip
> into a string in memory.  It sounds like it's exceeding the resources
> you have available (whether overall or because the Apache runtime
> environment has stricter limits).
>
> You may want to peek at a recent message from me in the "Unable to
> read large files from zip" thread, as the suggestion there may also be
> suitable for your purposes.
>
> http://groups.google.com/group/comp.lang.python/msg/de04105c170fc805?...
> -- David

David,

Thank you. I read your post and I basically understood the concept,
butI could not get my head around the code, I need to write for my
solution. (Newbie and a bit long in the tooth)

To solve my problem, I think my best approach would be to read my
zipped file / files from the zip archive when I need them.  Max three
users, occasional use.  So no big overloading of host's server.

pseudo code

zfhdl = zopen(zip,filename)          # Open File in Zip Archive for
Reading

while True:
    ln = zfhdl.readline()            # Get nextline of file
    if not ln:                       # if EOF file
      break
    dealwithline(ln)                 # do whatever is necessary with
file
zfhdl.close

That is probably over simplified, and probably wrong but you may get
the idea of what I am trying to achieve.

Richard



From __peter__ at web.de  Wed Aug 22 12:19:27 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 22 Aug 2007 18:19:27 +0200
Subject: instance method questions
References: <mailman.119.1187796216.32294.python-list@python.org>
Message-ID: <fahnmf$pn5$00$2@news.t-online.com>

Danny wrote:

> I have created an instance method for an object using new.instancemethod.
> It works great. Now the questions are:
> 
> 1) how do I dynamically inspect an object to determine if it has an
> instance method? (there is a class method with the same name)

Why would you want to do that?

Here is a way that relies on an implementation detail of current CPython:

>>> class Foo(object):
...     def foo(self): pass
...     def __init__(self):
...             import new
...             def bar(self): pass
...             self.foo = new.instancemethod(bar, self)
...
>>> x = Foo()
>>> x.foo is x.foo
True
>>> del x.foo
>>> x.foo is x.foo
False

This alternative is a little less subtle:

>>> y = Foo()
>>> "foo" in y.__dict__
True
>>> del y.foo
>>> "foo" in y.__dict__
False

Peter


From attn.steven.kuo at gmail.com  Thu Aug 16 15:58:49 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Thu, 16 Aug 2007 19:58:49 -0000
Subject: sub-classing the types in the builtin module datetime
In-Reply-To: <mailman.2043.1187225689.22759.python-list@python.org>
References: <mailman.2043.1187225689.22759.python-list@python.org>
Message-ID: <1187294329.082872.230800@l22g2000prc.googlegroups.com>

On Aug 15, 5:54 pm, "Colin J. Williams" <c... at sympatico.ca> wrote:
> I posted this about 5 hours ago, but it seems to have gone astray.


(snipped)

>  >
>  >> I wish to sub-class (if that's the right word) datetime and to use a
>  >> different signature for the constructor.
>  >>
>  >> The second part has gone smoothly, but it is difficult to access the
>  >> type's methods from the sub-class instance.
>  >>
>  >> I'm beginning to wonder whether it might might be simpler to write my
>  >> own Date class.
>  >>
>  >> Does anyone have any comments please?
>  >>
>  >> Colin W.

(snipped)


> Yes, I should have posted an example, but I thought that others might
> have experienced the problem.
>
> It is illustrated at the bottom of this script:
>
> # subClassing.py
>
> import datetime
> import new
> import sys
> import types
>
> class Date(datetime.datetime):
>    ''' Date(s) -> a date object.__class__
>          where s is an 8 digit string'''
>
>    def __new__(cls, YYmmdd):
>      ''' YYmmdd is a string, in the form yyyymmdd i.e. 8 digits.
>      or            a 3-tuple of integers in the form (y, m, d)
>      or            a 6-tuple of integers in the form (y, m, d, h, m,
> s) '''


(snipped)

>
> a= datetime.datetime(2007, 7, 31)
> d= Date('20070731')
> tm= datetime.time(1, 2)
> try:
>    print a.today()
> #  print d.today()        # grief
>    print a.now()
> #  print d.now()          # grief
>    print a.combine(a, tm)  # OK, but  why not a.combine(tm)?
> #  e= d.combine(d, tm)    # grief
>    print a.utcnow()
> #  print d.utcnow()       # grief
>    print a.ctime()
>    print d.ctime()
> except:
>    print 'Grief'
>    print sys.exc_info()
>
> Colin W.





This problem arises when you change the function signature of __new__.
I'm a little unclear as to why but it seems for the classmethods
(thosed marked with the METH_CLASS flag in the C source code), you
need to arrange to bypass the normal method resolution (I used a
metaclass
to do this):



import datetime

class Date(datetime.datetime):
    pass

class FixClassMethods(type):
    def __init__(cls, classname, bases, classdict):
        # add strptime if using Python 2.5
        flagged_as_meth_class = ('today', 'now', 'fromtimestamp',
        'fromordinal', 'now', 'utcnow', 'utcfromtimestamp', 'combine')
        for meth in flagged_as_meth_class:
            setattr(cls, meth, getattr(datetime.datetime, meth))

class DateChangesNewSignature(datetime.datetime):
    @staticmethod
    def str2ymd(strval):
        yyyy, mm, dd = (int(substr) for substr in (strval[:4],
            strval[4:6], strval[6:]))
        return yyyy, mm, dd

    def __new__(cls, strval):
        yyyy, mm, dd = DateChangesNewSignature.str2ymd(strval)
        return super(DateChangesNewSignature,cls).__new__(cls, yyyy,
mm,
                dd)
    def __init__(self, strval):
        yyyy, mm, dd = DateChangesNewSignature.str2ymd(strval)
        super(DateChangesNewSignature, self).__init__(yyyy, mm,
                dd)

class DLast(DateChangesNewSignature):
    __metaclass__ = FixClassMethods

f = Date(2007,07,07)
print f
print f.today()

f2 = DateChangesNewSignature("20070707")
print f2
try:
    print f2.today()
except TypeError, e:
    print str(e)
    print "Uh?"


f3 = DLast("20070707")
print f3
print f3.today()


I get:

2007-07-07 00:00:00
2007-08-16 12:57:41.480679
2007-07-07 00:00:00
__new__() takes exactly 2 arguments (9 given)
Uh?
2007-07-07 00:00:00
2007-08-16 12:57:41.483104


--
Hope this helps,
Steven



From jmtulloss at gmail.com  Thu Aug  9 12:51:47 2007
From: jmtulloss at gmail.com (Justin T.)
Date: Thu, 09 Aug 2007 16:51:47 -0000
Subject: Stackless Integration
In-Reply-To: <mailman.1798.1186675098.22759.python-list@python.org>
References: <1186650027.043779.276520@i38g2000prf.googlegroups.com>
	<mailman.1798.1186675098.22759.python-list@python.org>
Message-ID: <1186678307.205621.221100@x40g2000prg.googlegroups.com>

On Aug 9, 8:57 am, "Terry Reedy" <tjre... at udel.edu> wrote:
> First, which 'stackless'?  The original continuation-stackless (of about 7
> years ago)?  Or the more current tasklet-stackless (which I think is much
> younger than that)?
>
The current iteration. I can certianly understand Guido's distaste for
continuations.

>
> overcome.  It is just not part of the stdlib.
And I wish it were! It wouldn't be such a pain to get to my developers
then.

> And as far as I know or
> could find in the PEP index, C. Tismer has never submitted a PEP asking
> that it be made so.  Doing so would mean a loss of control, so there is a
> downside as well as the obvious upside of distribution.
That's true. Though, hopefully, the powers that be would allow him to
maintain it while it's in the stdlib. Maybe we should file a PEP for
him... :)

Justin



From anders.u.persson at gmail.com  Fri Aug 24 12:53:38 2007
From: anders.u.persson at gmail.com (anders)
Date: Fri, 24 Aug 2007 09:53:38 -0700
Subject: GUI and distrubution
Message-ID: <1187974418.175783.50860@i38g2000prf.googlegroups.com>

I have looked att Python on www.showmedo.com
And after this i start testing writing som program i Python.
But...

So how is the preferably way to distribute software written i Python
i am NOT into hiding stuff, more a easy way of giving eg friends
a copy of the program without having them installtion a lott
och other stuff.

My next question is witch is the best GUI to use, also consider
the delivery question above.

// Anders



From zentraders at gmail.com  Fri Aug  3 14:02:06 2007
From: zentraders at gmail.com (Zentrader)
Date: Fri, 03 Aug 2007 18:02:06 -0000
Subject: i am new to python-Please somebody help
In-Reply-To: <mailman.1558.1186124330.22759.python-list@python.org>
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com>
	<46b249a4$0$31219$426a74cc@news.free.fr>
	<mailman.1558.1186124330.22759.python-list@python.org>
Message-ID: <1186164126.342012.214020@i13g2000prf.googlegroups.com>

BTW - on the subject of polite discussions, how about this one as an
example of opinions politely expressed.
Oh, and does anyone know how to use zip in Python.  Yes+1.



From sylviajam at gmail.com  Sat Aug  4 15:21:22 2007
From: sylviajam at gmail.com (S Jam)
Date: Sat, 04 Aug 2007 12:21:22 -0700
Subject: =?utf-8?B?4peZ4peZ4peZIFR1cm4gWW91ciBQQyBJbnRvIFNhdGVsbGl0ZSBUViAmIFdhdGNoIGl0IEZSRUUgb2YgQ29zdOKXhOKXmeKXmeKXmQ==?=
Message-ID: <1186255282.905274.288320@x35g2000prf.googlegroups.com>

Watch Satellite TV On Your Computer Without Paying Monthly Fees... FOR
FREE?

Watch all your favorite shows on your Computer from anywhere in the
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From hg at nospam.org  Sun Aug 26 19:00:09 2007
From: hg at nospam.org (hg)
Date: Sun, 26 Aug 2007 23:00:09 GMT
Subject: ANN: SCF released to GPL
Message-ID: <ZBnAi.21498$eY.43@newssvr13.news.prodigy.net>

Dear all,

I am releasing much of my work including SCF (Cross platform Smart Card
library & Tools written in Python) to the GPL license.

If interested, go to http://www.SnakeCard.com/Source.html

I am moving the doc to doxygen and cleaning up the code, so what you'll see
there will change in the course of the next few weeks - basically can only
get meaningful info on the classes hierarchy at this stage.
I am looking for a free subversion server resource to put the code ... if
you know of any.

Some of the work there will be windows-only related (GINA, activeX
components ... and not coded in Python) and the applets JavaCard and
BasicCard ... I'm releasing these during the next few days.

Regards,

hg 


From roy at panix.com  Fri Aug 31 01:15:04 2007
From: roy at panix.com (Roy Smith)
Date: Fri, 31 Aug 2007 01:15:04 -0400
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<1188534061.243009.89640@m37g2000prh.googlegroups.com>
Message-ID: <roy-1338B4.01150431082007@news.panix.com>

Carl Banks <pavlovevidence at gmail.com> wrote:
> Python really isn't suitable for in-flight controls for various
> reasons, and mission critical concerns is a minor one (systems with
> less underlying complexity tend to have fewer failure modes).  But
> mostly it's raw throughput: Python is just too slow.  Flight control
> computers have to be powerful enough make a ton of mathematical
> calculations in a matter of milliseconds, and under strict weight and
> power constraints.  The cost of running 100 times slower than optimal
> is just too high.

I'm not convinced that's true for all avionics uses.  Certainly, if you're 
doing the fly-by-wire stability control system for a dynamically unstable 
airframe, you need a lot of compute power and guaranteed real-time response 
(recovery from a VMC rollover is no time for garbage collection).  But, not 
everything in an airplane is like that.

Take something relatively complicated like a GPS.  The basic receiver is 
pretty compute intensive, but that's likely to be a dedicated chip.  Most 
of the functionality in the box, however, requires a lot less horsepower.  
You need to handle user input (i.e. keep up a scan on maybe 20 keys), and 
update a low-res display (320 x 240 x 8 bit color is typical) with text or 
cartoon graphics.  There are certain real-time calculations which need to 
be done, such as time, distance, and bearing to the next waypoint, but 
these are typically updated a few times a second.

Like most things that use Python (or TCL, or Ruby, or ...), I would expect 
that most of the low-level stuff would be done in something like C and 
Python would be used for the glue code and things where there's no time 
pressure.


From carairconditionersmail at gmail.com  Sun Aug 19 13:42:07 2007
From: carairconditionersmail at gmail.com (carairconditionersmail at gmail.com)
Date: Sun, 19 Aug 2007 17:42:07 -0000
Subject: A/C Systems!
In-Reply-To: <1187545194.099278.217330@w3g2000hsg.googlegroups.com>
References: <1187545194.099278.217330@w3g2000hsg.googlegroups.com>
Message-ID: <1187545327.963222.223220@w3g2000hsg.googlegroups.com>

On Aug 19, 7:39 pm, Cartun... at gmail.com wrote:
> Everything you need to know about car air conditioners...
>
> http://car-air-conditioning.blogspot.com/

Great website man, I found everything I need



From theshadowx at gmail.com  Thu Aug 23 13:44:45 2007
From: theshadowx at gmail.com (TheShadow)
Date: Thu, 23 Aug 2007 17:44:45 -0000
Subject: Question about embedding python in C++
Message-ID: <1187891085.147246.19380@i38g2000prf.googlegroups.com>

When extending python in c/c++ after you register a module is there a
way in c/c++ to check if they were correctly registered?

Cause I'm having the problem where when I execute the the python
script it finds the module but none of the functions.



From deets at nospam.web.de  Fri Aug  3 07:09:03 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 03 Aug 2007 13:09:03 +0200
Subject: (no) fast boolean evaluation ? missing  NOT
In-Reply-To: <eb4fb$46b2f7a6$d443bb3a$21643@news.speedlinq.nl>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<mailman.1545.1186095368.22759.python-list@python.org>
	<1186096979.397596.36640@e16g2000pri.googlegroups.com>
	<eb4fb$46b2f7a6$d443bb3a$21643@news.speedlinq.nl>
Message-ID: <5hggmmF3k8fdoU1@mid.uni-berlin.de>

Stef Mientki schrieb:
> John Machin wrote:
>> On Aug 3, 8:55 am, Ian Clark <icl... at mail.ewu.edu> wrote:
>>> Stef Mientki wrote:
>>>> hello,
>>>> I discovered that boolean evaluation in Python is done "fast"
>>>> (as soon as the condition is ok, the rest of the expression is 
>>>> ignored).
>>>> Is this standard behavior or is there a compiler switch to turn it 
>>>> on/off ?
>>>> thanks,
>>>> Stef Mientki
>>> It's called short circuit evaluation and as far as I know it's standard
>>> in most all languages. This only occurs if a conditional evaluates to
>>> True and the only other operators that still need to be evaluated are
>>> 'or's or the condition evaluates to False and all the other operators
>>> are 'and's. The reason is those other operators will never change the
>>> outcome: True or'd with any number of False's will still be True and
>>> False and'ed to any number of Trues will still be False.
>>>
>>> My question would be why would you *not* want this?
>>>
>>>
>>
>> Why? Perhaps under some compound condition like this:
>>
>> (you_are_confused and/or
>> function_returns_bool_but_has__side_effects())
>>
> 
> Thanks guys,
> Yes this is exactly what's going wrong ...
> 
> Sorry, my question missed the essential "NOT",
> here is an example, that behaves different in Delphi,
> (so I guess Delphi is not a real language ;-)
> 
> <Python>
> def Some_Function (const):
>     print 'Ive been here', const
>     return True
> 
> A = True
> 
> if A and Some_Function (4 ):
>     print 'I knew it was True'
> else:
>     print 'I''ll never print this'
> </Python>
> 
> <Output>
> Ive been here 4
> I knew it was True
> </Output
> 
> I was expected that the function would not be called,
> because A is True.
> 
> And I agree with Laurent that it should be better to write a clean code,
> so it doesn't matter whether you write in Python or in Delphi.
> 
> Gabriel: you pointed me to this page:
> The exact behavior is defined in the Language Reference 
> <http://docs.python.org/ref/Booleans.html>
> 
> <quote>
> or_test      ::=      and_test | or_test "or" and_test
> </quote
> 
> Can you imagine, while I'm not a programmer, just a human,
> that I don't understand one bit of this line.
> 
> So now I'm left with just one question:
> for bitwise operations I should use &, |, ^
> for boolean operations I should use and, or, xor
> but after doing some test I find strange effects:
>  >>> A = 4
>  >>> B = 5
>  >>> A and B
> 5
>  >>> A & B
> 4
>  >>> A or B
> 4
>  >>> A | B
> 5
> 
> So if I use the bitwise operation on integers,
>   "and" changes into (bitwise) "or" and vise versa.

No!!! Don't think that!

Choose different numbers, and you will see that.

The semantics for the and/or operators are spelled out like this 
(extra-verbose):


def and(a, b):
     if bool(a) == True:
        if bool(b) == True
           return b # because it holds True == bool(b)
     return a # because it holds Fals == bool(a)

def or(a, b):
     if bool(a) == True:
        return a
     return b


This could be considered unfortunate because it relies on the implicit 
boolean nature of certain values like "", 0, 1, {} and so forth - but 
it's the way it is.

However, this has _nothing_ to do with the bitwise operations! The work 
on the bits of integers, and because 5 and 4 are bitwise 0b101 and 
0x100, the

5 & 4 -> 4 == 0b100

and

5 | 4 -> 5 == 0x101

That's all!

If you need non-circuiting and/or, write functions and and or:

def and_(a, b):
     return a and b

def or_(a, b):
     return a or b

That will ensure argument evaluation.

Diez


From bj_666 at gmx.net  Wed Aug  1 01:55:35 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 1 Aug 2007 05:55:35 GMT
Subject: How does xmlrpc work ?
References: <1185946334.436503.326920@x40g2000prg.googlegroups.com>
Message-ID: <5halimF3inuf2U1@mid.uni-berlin.de>

On Wed, 01 Aug 2007 05:32:14 +0000, hide1713 at gmail.com wrote:

> I am working on a system which used XMLRPC to communicate between
> hundreds of computer. One administrative computer keeps hundreds of
> xmlrpc instance of other computers.  I want to know if evey instance
> use a single connection and keep it alive forever OR create a new
> connection when a method is called and end it after the call is
> finished?

Every XMLRPC call uses its own HTTP connection that is closed after the
call is finished.

Ciao,
	Marc 'BlackJack' Rintsch


From michael at jedimindworks.com  Thu Aug  9 08:05:31 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Thu, 9 Aug 2007 05:05:31 -0700
Subject: Stackless Integration
In-Reply-To: <20070809114832.4947.1833247582.divmod.quotient.20482@ohm>
References: <20070809114832.4947.1833247582.divmod.quotient.20482@ohm>
Message-ID: <81C07501-369D-4209-9A5F-34B446EDB8D3@jedimindworks.com>


On Aug 9, 2007, at 4:48 AM, Jean-Paul Calderone wrote:

> On Thu, 09 Aug 2007 09:00:27 -0000, "Justin T."  
> <jmtulloss at gmail.com> wrote:
>> Hi,
>>
>> I've been looking at stackless python a little bit, and it's awesome.
>> My question is, why hasn't it been integrated into the upstream  
>> python
>> tree? Does it cause problems with the current C-extensions? It seems
>> like if something is fully compatible and better, then it would be
>> adopted. However, it hasn't been in what appears to be 7 years of
>> existence, so I assume there's a reason.
>
> It's not Pythonic.

Can you be more specific?  It's a good question that I had thought  
about asking...

---
Debugging is twice as hard as writing the code in the first place.   
Therefore, if you write the code as cleverly as possible, you are, by  
definition, not smart enough to debug it. --Brian W. Kernighan




From stefan.behnel-n05pAM at web.de  Fri Aug  3 11:50:41 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 03 Aug 2007 17:50:41 +0200
Subject: Replacing _xmlplus.dom.minidom with xml.dom.minidom
In-Reply-To: <mailman.1565.1186149474.22759.python-list@python.org>
References: <1186148352.647143.68890@l70g2000hse.googlegroups.com>
	<mailman.1565.1186149474.22759.python-list@python.org>
Message-ID: <46B34ED1.60402@web.de>

Robert Rawlins - Think Blue wrote:
> Just as a heads up, minidom is pretty inefficient and difficult to work with
> too.
> 
> On someone else's advice I switched over to ElementTree and have been really
> pleased with the results, its much simpler to work with and more efficient
> too.

/and/ lxml.etree is compatible to ElementTree, so once you have written your
code for ElementTree, you can switch to lxml.etree if ever you need things
like XPath, XSLT or validation.

However, as I understand the OP, the question deals with old code, so porting
it to ET (i.e. reimplementing it) might not be that easy...

Stefan


From http  Sat Aug 11 01:06:10 2007
From: http (Paul Rubin)
Date: 10 Aug 2007 22:06:10 -0700
Subject: The Future of Python Threading
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<1i2njyp.1o6yslqe7ff47N%luc@honk-honk.com>
	<1186782710.600889.245930@j4g2000prf.googlegroups.com>
	<1186802188.653072.236260@x40g2000prg.googlegroups.com>
	<1186807396.988368.201400@b79g2000hse.googlegroups.com>
Message-ID: <7xk5s2wth9.fsf@ruckus.brouhaha.com>

Seun Osewa <seun.osewa at gmail.com> writes:
> What is it about Python that makes a thread-safe CPython version much
> slower?...
> I'm thinking it might be the reference counting approach to memory
> management... 

Yes.  In the implementation that was benchmarked, if I understand
correctly, every refcount had its own lock, that was acquired and
released every time the refcount was modified.


From twisted0n3 at gmail.com  Sun Aug 19 23:08:35 2007
From: twisted0n3 at gmail.com (Twisted)
Date: Mon, 20 Aug 2007 03:08:35 -0000
Subject: A/C Systems!
In-Reply-To: <1187554376.345506.82660@i38g2000prf.googlegroups.com>
References: <1187545194.099278.217330@w3g2000hsg.googlegroups.com>
	<1187545327.963222.223220@w3g2000hsg.googlegroups.com>
	<1187554376.345506.82660@i38g2000prf.googlegroups.com>
Message-ID: <1187579315.469495.175990@m37g2000prh.googlegroups.com>

On Aug 19, 4:12 pm, Daniel Pitts <googlegrou... at coloraura.com> wrote:
> Don't you know that targeted advertising has far better return?

Only when each impression is fairly expensive to cause. Unfortunately,
spam (whether usenet, guestbook, blog comment, email, or whatever) is
very cheap per impression, so the best strategy is indeed to just jizz
enormous amounts of it indiscriminately into any socket that will
accept the insertion of your network packets. It's the same problem as
causes the battle of the sexes; expensive eggs vs. cheap sperm. :P




From grante at visi.com  Thu Aug 23 16:25:18 2007
From: grante at visi.com (Grant Edwards)
Date: Thu, 23 Aug 2007 20:25:18 -0000
Subject: Putting #'s and variables together in 1 variable
References: <eb79828c0708231309g7a7dd38fpb6dad836b8552cb0@mail.gmail.com>
	<mailman.198.1187900429.32294.python-list@python.org>
Message-ID: <13crr9emd038k1a@corp.supernews.com>

On 2007-08-23, Jay Loden <python at jayloden.com> wrote:

> 2) Since all you're doing is adding a bunch of numeric values to each other
>    to build the string, why wouldn't you just create a random number between
>    0 -> 99999 and use that?

Since the OP calls randint 5 times, his answer is 5 times more
random!

-- 
Grant Edwards                   grante             Yow! Everybody gets free
                                  at               BORSCHT!
                               visi.com            


From alexandre.badez at gmail.com  Wed Aug 29 09:39:27 2007
From: alexandre.badez at gmail.com (Alex)
Date: Wed, 29 Aug 2007 13:39:27 -0000
Subject: What's the difference ?
Message-ID: <1188394767.333396.129020@r29g2000hsg.googlegroups.com>

Hye,

I was just wondering what is the difference between

>> if my_key in mydict:
>>     ...

and

>> if mydict.has_keys(my_key):
>>     ...

I've search a bit in the python documentation, and the only things I
found was that they are "equivalent".

But in this (quiet old) sample ( "http://aspn.activestate.com/ASPN/
Cookbook/Python/Recipe/59875" ), there is difference between the two
notation.

Thanks in advance



From samfeltus at gmail.com  Thu Aug  2 23:18:24 2007
From: samfeltus at gmail.com (SamFeltus)
Date: Fri, 03 Aug 2007 03:18:24 -0000
Subject: ANN: SonomaSunshine for Django v0.01
Message-ID: <1186111104.690781.155910@b79g2000hse.googlegroups.com>

Presented for your amusement, with source code for the first time!!!
LOL

The Redneck Riviera's Best Python Powered Folk Art Server...

SonomaSunshine v0.01 for Django

Django application for creating/editing Shiny/Happy Flash movies.

http://samfeltus.com/django/hey_yall.html



From nospam at invalid.com  Sun Aug 19 00:37:33 2007
From: nospam at invalid.com (Jack)
Date: Sat, 18 Aug 2007 21:37:33 -0700
Subject: Parser Generator?
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
Message-ID: <_6mdnZxbdNKTVFrbnZ2dnUVZ_tqtnZ2d@comcast.com>

Thanks for all the replies!

SPARK looks promising. Its doc doesn't say if it handles unicode
(CJK in particular) encoding though.

Yapps also looks powerful: http://theory.stanford.edu/~amitp/yapps/

There's also PyGgy http://lava.net/~newsham/pyggy/

I may also give Antlr a try.

If anyone has experiences using any of the parser generators with CJK
languages, I'd be very interested in hearing that.

Jack


"Jack" <nospam at invalid.com> wrote in message 
news:abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d at comcast.com...
> Hi all, I need to do syntax parsing of simple naturual languages,
> for example, "weather of London" or "what is the time", simple
> things like these, with Unicode support in the syntax.
>
> In Java, there are JavaCC, Antlr, etc. I wonder what people use
> in Python? Antlr also has Python support but I'm not sure how good
> it is. Comments/hints are welcome.
> 




From irmen.NOSPAM at xs4all.nl  Mon Aug 13 19:15:34 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 14 Aug 2007 01:15:34 +0200
Subject: ANN: Compyler 0.1
In-Reply-To: <1187020875.575423.58000@o61g2000hsh.googlegroups.com>
References: <mailman.1859.1186862018.22759.python-list@python.org>
	<46bf2ea3$0$240$e4fe514c@news.xs4all.nl>
	<1187020875.575423.58000@o61g2000hsh.googlegroups.com>
Message-ID: <46c0e61f$0$241$e4fe514c@news.xs4all.nl>

Thanks Grant for the very informative response.

-irmen


From dwahler at gmail.com  Tue Aug  7 21:35:54 2007
From: dwahler at gmail.com (David Wahler)
Date: Tue, 7 Aug 2007 20:35:54 -0500
Subject: Something in the function tutorial confused me.
In-Reply-To: <46B8626A.2070303@bigfoot.com>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
	<46B8626A.2070303@bigfoot.com>
Message-ID: <dad14b100708071835m18d49337tbfd727612e77add6@mail.gmail.com>

On 8/7/07, Ricardo Ar?oz <ricaraoz at gmail.com> wrote:
> Lee Fleming wrote:
> > Thanks for all the help, everyone. I guess I was confused with default
> > arguments that were mutable and immutable. I will continue to look
> > over these posts until I understand what is happening.
> >
> > I cannot believe the number of helpful responses I got!
> >
>
> Apparently he didn't understand.
> Neither did I.
>
> Either (i)y's initial value (None or []) is saved somewhere to be
> retrieved every time the function is called without 2nd argument, or
> (ii) y keeps the value it has when last exiting the function (if there
> is a third option, please mention it).
>

It's option (i).

> (i) (a) whenever the function is called without 2nd argument the value
> None is retrieved and assigned to y, thus causing [] to be assigned to y
> by the 'if' statement.

Yep.

> (i) (b) But then if it is "def f(x, y = [])" the list [] should be ALSO
> saved somewhere and when the function is called without 2nd argument it
> should be retrieved and assigned to y, thus y would always be [] when
> you enter the function without 2nd arg.

No, when the def statement is executed, the expression [] is
evaluated, and the result of this evaluation is an empty list. It's a
reference to this list that is saved, not the expression itself. All
invocations of the function that use the default argument refer to the
same list, so if it gets modified the modifications persist.

-- David

From damondolby at googlemail.com  Tue Aug 14 12:04:12 2007
From: damondolby at googlemail.com (towers)
Date: Tue, 14 Aug 2007 09:04:12 -0700
Subject: module: zipfile.writestr - line endings issue
Message-ID: <1187107452.905165.45700@l70g2000hse.googlegroups.com>


Hi

I'm probably doing something stupid but I've run into a problem
whereby I'm trying to add a csv file to a zip archive - see example
code below.

The csv just has several rows with carriage return line feeds (CRLF).

However after adding it to an archive and then decompressing the line
endings have been converted to just line feeds (LF).

Does anyone know if this is a bug or am I just doing something wrong?

Many Thanks,
Damon

****************************************************************************
import zipfile


zipFile = zipfile.ZipFile('LocalZipFile.zip', 'a',
zipfile.ZIP_DEFLATED)
dfile = open('LocalCSVFile.csv', 'r')
zipFile.writestr('test.csv',dfile.read())
dfile.close()
zipFile.close()
****************************************************************************



From arunmail at gmail.com  Thu Aug  2 15:54:52 2007
From: arunmail at gmail.com (lazy)
Date: Thu, 02 Aug 2007 19:54:52 -0000
Subject: Berkely Db. How to iterate over large number of keys "quickly"
In-Reply-To: <1186083838.318952.254370@q3g2000prf.googlegroups.com>
References: <1186083838.318952.254370@q3g2000prf.googlegroups.com>
Message-ID: <1186084492.982045.278500@x40g2000prg.googlegroups.com>

Sorry, Just a small correction,

> a way I can tell Python to not load allkeys, but try to access it as
> the loop progresses(like in a linked list). I could find any accessor
> methonds on bsddb to this with my initial search.

I meant, "I couldn't find any accessor methonds on bsddb to do
this(i.e accesing like in a linked list) with my initial search"

> I am guessing BTree might be a good choice here, but since while the
> Dbs were written it was opened using hashopen, Im not able to use
> btopen when I want to iterate over the db.




From david at asdf.asdf  Fri Aug 24 05:07:48 2007
From: david at asdf.asdf (bambam)
Date: Fri, 24 Aug 2007 19:07:48 +1000
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com><1187898049.734696.9500@l22g2000prc.googlegroups.com><13csi2tn49esmc3@corp.supernews.com>
	<mailman.230.1187928865.32294.python-list@python.org>
	<13csqk47j0c56b0@corp.supernews.com>
	<CqSdnRl2x8928FPbnZ2dnUVZ_jSdnZ2d@speakeasy.net>
Message-ID: <13ct7v3qn2v5206@corp.supernews.com>

> This isn't a "cast" in the sense of some less-strongly-typed languages; 
> it's just a conversion.  The `list` function/type iterates over its 
> argument and turns it into a list.  Sets are iterable, so that's all 
> that's really going on here.

oh :~). Learning experience happening here... Thank you.

> The reason that lists don't have set-like methods is because
> lists aren't sets -- lists can contain duplicate elements

Interesting point -- if that's all there is in it, then lists should
have difference and intersection methods. Not because they
are the same as sets -- because they are slightly different than
sets. In this case it doesn't matter - my lists don't contain
duplicate elements this time - but I have worked with lists in
money market and in inventory, and finding the intersection
and difference for matching off and netting out are standard
operations.
Still, any built in feature would probably be too simple to
use in any but the simplest cases.

Steve.



"Erik Max Francis" <max at alcyone.com> wrote in message 
news:CqSdnRl2x8928FPbnZ2dnUVZ_jSdnZ2d at speakeasy.net...
> bambam wrote:
>
>> Excellent. By symmetry, I see that "list" casts the set back into a list.
>>
>> I wonder why list has not been extended with the same (difference,
>> interesection) methods?  Casting to set looks a little kludgy:
>>
>> c = list(set(a)-set(b))
>> I wonder if that is clearer than the explicit loop?
>
> This isn't a "cast" in the sense of some less-strongly-typed languages; 
> it's just a conversion.  The `list` function/type iterates over its 
> argument and turns it into a list.  Sets are iterable, so that's all 
> that's really going on here.
>
> The reason that lists don't have set-like methods is because lists aren't 
> sets -- lists can contain duplicate elements, whereas sets cannot.  You 
> should use the proper type for your needs; if you want to take two lists, 
> remove duplicate elements, and then end up with a list, then the 
> sets-difference-and-then-make-a-list mechanism is appropriate.
>
> -- 
> Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
>  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
>   It [freedom] must be demanded by the oppressed.
>    -- Dr. Martin Luther King, Jr. 




From attn.steven.kuo at gmail.com  Fri Aug 24 01:04:31 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Thu, 23 Aug 2007 22:04:31 -0700
Subject: List Comprehension Question: One to Many Mapping?
In-Reply-To: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
References: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
Message-ID: <1187931871.350842.261120@r23g2000prd.googlegroups.com>

On Aug 23, 9:24 pm, beginner <zyzhu2... at gmail.com> wrote:
> Hi All,
>
> How do I map a list to two lists with list comprehension?
>
> For example, if I have x=[ [1,2], [3,4] ]
>
> What I want is a new list of list that has four sub-lists:
>
> [[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]]
>
> [1,2] is mapped to [1,2] and [f(1), f(2)] and [3,4] is mapped to
> [3,4], [f(3), f(4)].
>
> I just can't find any way to do that with list comprension. I ended up
> using a loop (untested code based on real code):
>
> l=[]
> for y in x:
>    l.append(y)
>    l.append([f(z) for z in y])
>


Suppose f is:

>>> def f(n): return str(n)

>>> import itertools

Using a list comprehension:

>>> [i for i in itertools.chain(*[(eachx, [f(y) for y in eachx]) for eachx in x])]
[[1, 2], ['1', '2'], [3, 4], ['3', '4']]


Using a list:

>>> list(itertools.chain(*[(eachx, [f(y) for y in eachx]) for eachx in x]))
[[1, 2], ['1', '2'], [3, 4], ['3', '4']]


Not so pretty in either case.

--
Hope this helps,
Steven



From dorjetarap at googlemail.com  Sat Aug 18 14:39:18 2007
From: dorjetarap at googlemail.com (dorje tarap)
Date: Sat, 18 Aug 2007 19:39:18 +0100
Subject: regular expression dictionary search
Message-ID: <d6a0d8f10708181139m730d7aa6t1c9f6e624d6db9aa@mail.gmail.com>

Hi

I have a dictionary with a list of patterns:
 Code: ( text )

   1. >>> words = {'sho.':6, '.ilk':8,'.an.':78 }


Where the "." character means any pattern - this can easily be changed to
the "*" symbol if need be.

When the user submits a word, I want to be able to look for a corresponding
pattern (if it exists). For example if the user said "show" or "shoe", then
the value 6 would be returned. If it was "band", "land", "sand", "pant" etc
then 78 would be returned - but not "pants" as it is longer than the
pattern.

I know the normal way is to provide the reg exp and search the dictionary
with it, but this is the other way round :(

Thanks
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From laurent.pointal at wanadoo.fr  Sat Aug 11 14:09:03 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Sat, 11 Aug 2007 20:09:03 +0200
Subject: python 2.5 bug
References: <1186825286.493878.80380@l70g2000hse.googlegroups.com>
	<5i5fktF3ml00gU1@mid.uni-berlin.de>
	<1186826980.346619.287670@r34g2000hsd.googlegroups.com>
Message-ID: <46bdfb3f$0$5102$ba4acef3@news.orange.fr>

 vedrandekovic at v-programs.com wrote:

> On 11 kol, 11:59, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Sat, 11 Aug 2007 02:41:26 -0700, vedrandekovic wrote:
>> > I was install Python 2.5 and uninstall Python 2.4 now I cannot run my
>> > scripts, only from idle
>>
>> > What should I do?
>>
>> Install 2.4 again.  Both can be installed in parallel.
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch
> 
> I need python 2.5 for work becose python 2.4 module tokenizer has no
> attribute "untokenize"

IMHO Python 2.4 was registered for .py files, Python 2.5 take precedence
when installed, but when Python 2.4 has been removed, it remove .py files
association too (so break Python 2.5 association).

* manually associate .py/.pyc/.pyo files to python.exe, .pyw files to
pythonw.exe.

* or reinstall Python 2.5 so that it re-setup ad-hoc associations.




From soundplay at gmail.com  Sat Aug 18 08:24:35 2007
From: soundplay at gmail.com (SHY)
Date: Sat, 18 Aug 2007 14:24:35 +0200
Subject: passing arguments with ampersands
In-Reply-To: <20070818112913.GA3632@gmail.com>
References: <f6be0af40708180354u719f5c71p2be27e0ee8317f9b@mail.gmail.com>
	<20070818112913.GA3632@gmail.com>
Message-ID: <f6be0af40708180524n8d11a68xfcbee5c7f268bdea@mail.gmail.com>

theres no special portion of code, just the one that handles filenames with
spaces.
the problem is that when i associate a file extension to my application and
i open it, the filename is not quoted before passed as an arguement. i dont
know if its the problem of windows or something, or it was just my fault
when i incorrectly associated the extension.
anyway, this is the code that outputs the second quote i posted in the
original message:

args = None
> if len(sys.argv) > 1:
>     args = sys.argv[1:]
>
print args
>

and this is the code that handles the filenames with spaces (as space
generally delimits cmdline params). its not very ellegant, needs a bit of
tuning, but it works (i dont use any kind of -d --something params yet).

[code]
newargs = []
if args:
    first = None
    for arg in args:
        if not first:
            first = arg
            continue

        if os.path.isfile(first):
            newargs.append(first)
            first = None
            continue

        if arg.find(":") == -1:
            first = " ".join([first, arg])

    if first:
        newargs.append(first)
[/code]

how can i make the params get quoted before send as arguments?

thanks in advance.



>
> 2007/8/18, O.R.Senthil Kumaran <orsenthil at users.sourceforge.net>:

> Quote:D:\ftp\Music\Mixes & Compilations\Above & Beyond - Essential
> > Mix\001_Essential_Mix_2004-06-06_-_Above_and_Beyond.txt
>
> > when i put 'print sys.argv[1:]' at the very beginning of the script, all
> i
> > get is this:
> >
> > Quote:['D:\\ftp\\Music\\Mixes']
> >
> Can you share the portion of the code?
> Are you quoting the argument that you are passing?
> for e.g:
>
> #cat 1.py
> import sys
> print sys.argv[1]
>
> #python 1.py "I am able to print the spaces and & characters"
> I am able to print the spaces and & characters
>
> --
> O.R.Senthil Kumaran
> http://uthcode.sarovar.org
>
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From duncan.booth at invalid.invalid  Wed Aug  8 10:52:39 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 Aug 2007 14:52:39 GMT
Subject: This bit of code hangs Python Indefinitely
References: <f9ch45$ku$1@solaris.cc.vt.edu>
	<mailman.1738.1186581012.22759.python-list@python.org>
	<f9ci4a$1t3$1@solaris.cc.vt.edu>
Message-ID: <Xns9986A07CEFBE8duncanbooth@127.0.0.1>

brad <byte8bits at gmail.com> wrote:

> Chris Mellon wrote:
> 
>> ... the producer is designed to block if
>> the queue is full. You can use the put_nowait method to have it raise
>> an exception instead of blocking.
> 
> I assumed that the behavior would have been the other way around. I 
> should not have made that assumption.
> 

You could possibly make a case that before Queue.put blocks it should check 
whether the program has more than just the one thread and if not it should 
raise an RTFMException.


From arkanes at gmail.com  Thu Aug 30 14:52:50 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 30 Aug 2007 13:52:50 -0500
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188430887.481586.106760@l22g2000prc.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<1188430887.481586.106760@l22g2000prc.googlegroups.com>
Message-ID: <4866bea60708301152g202fb267lf409effb215f538@mail.gmail.com>

On 8/29/07, Russ <uymqlp502 at sneakemail.com> wrote:
>
> > But it's always a good idea to make your software "correct and as
> > reliable as possible", isn't it? The problem is the external constraints
> > on the project. As the old saying goes: "Cheap, fast, reliable: choose
> > any two".
>
> If you are suggesting that "programming by contract" is not
> appropriate for every application, you will get no argument from me.
> All I am suggesting is that having the option to use it when you need
> it is very desirable, and it can possibly enhance the versatility of
> Python by making Python more suitable for *some* mission-critical
> applications.
>

PEP 316 introduces new syntax for a limited use feature. That's pretty
much a no-starter, in my opinion, and past experience tends to bear
that out. Furthermore, it predates decorators  and context managers,
which give all the syntax support you need and let you move the actual
DBC features into a library. I can't remember if I mentioned this
before but I believe that Philip Ebys PEAK toolkit has some stuff you
could use for DBC.

> I once read a book on something called SPARK Ada, which also supports
> programming by contract. I was pleasantly surprised to discover
> yesterday that support for the such methods is also available for
> Python. However, the support would obviously be a bit stronger if it
> were in the core Python distribution.
>

If a well written contract library were to exist, and people were to
use it, and the author were interested, it would make a decent
candidate for inclusion in the standard library, and I wouldn't oppose
such a thing (for all my opinion is worth, ie essentially nothing).
The PEP 316 special syntax is another matter entirely.

The best way for this to happen is for you to find or write such a
library, and use it to write good code.


From istvan.albert at gmail.com  Wed Aug  8 09:48:01 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Wed, 08 Aug 2007 13:48:01 -0000
Subject: This bit of code hangs Python Indefinitely
In-Reply-To: <f9ch45$ku$1@solaris.cc.vt.edu>
References: <f9ch45$ku$1@solaris.cc.vt.edu>
Message-ID: <1186580881.048597.134350@22g2000hsm.googlegroups.com>

On Aug 8, 9:38 am, brad <byte8b... at gmail.com> wrote:
> The problem is that I have 512 things to add to the queue, but my limit
> is half that... whoops. Shouldn't the interpreter tell me that I'm an
> idiot for trying to do this instead of just hanging? A message such as
> this would be more appropriate:


See the docs, especially the block and timeout parameter for the put
method:

http://docs.python.org/lib/QueueObjects.html


Istvan



From horpner at yahoo.com  Thu Aug 30 14:14:21 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 30 Aug 2007 18:14:21 GMT
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
Message-ID: <slrnfde2ei.1ek.horpner@FIAD06.norwich.edu>

On 2007-08-30, zzbbaadd at aol.com <zzbbaadd at aol.com> wrote:
>> How could it not be an exception, in the plain English sense
>> of the word? Most certainly you're asking for the index
>> because you want to do something with the index. If the item
>> is not found, you have no index, so that's a special case that
>> must be handled separately. There is no logical difference
>> between handling that special case in an except clause versus
>> handling it with an if-branch.
>
> In my case of have done os.listdir() on two directories. I want
> to see what files are in directory A that are not in directory
> B.

In that case list.find would not be much of a win, but sets might
be.

 not_in_both = list(set(os.listdir("A")) - set(os.listdir("B")))

> I have used exceptions in other languages and only do so on
> logic that should never happen. In this case it is known that
> some of the files will not be in both lists. I just want to
> know which ones.

"Exceptions" has become somewhat a misnomer. iterators are
implemented using exceptions, and there's hardly anything more
common in modern Python code. The hair shirts and thumb-screws
necessary for using exceptions correctly in C++, aren't needed in
Python.

-- 
Neil Cerutti


From jstroud at mbi.ucla.edu  Fri Aug  3 21:31:39 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 03 Aug 2007 18:31:39 -0700
Subject: How to pass a reference to the current module
In-Reply-To: <mailman.1597.1186189477.22759.python-list@python.org>
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<mailman.1597.1186189477.22759.python-list@python.org>
Message-ID: <f90ktr$hic$1@zinnia.noc.ucla.edu>

Carsten Haese wrote:
> please describe less abstractly what you're trying to do.

You sound like my former thesis adviser.

OK. From an external source, such as configuration file, the user will 
specify the *name* of a function somehow with the assumption that the 
function will be coded somewhere (in the present or other modules) by 
that name. This behavior is to be implemented in a very primitive 
pythoncard-like application wherein the user can specify hooks via a 
configuration file. The configuration file will describe the GUI. To go 
one more step deeper into the rationale, the idea would be to replace 
optparse type behavior with a gui wherein one can type input parameters 
into fields rather than specify them at the command line with optional 
flags.

Please take a look at my previous response to myself for one possible 
solution I devised. I don't particularly like it much, however, because 
it seems unnatural.

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From tjreedy at udel.edu  Fri Aug  3 14:49:49 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 3 Aug 2007 14:49:49 -0400
Subject: __call__ considered harmful or indispensable?
References: <mailman.1527.1186079415.22759.python-list@python.org>	<46b24200$0$19638$426a74cc@news.free.fr><mailman.1554.1186108869.22759.python-list@python.org>
	<46b2e0c2$0$14572$426a74cc@news.free.fr>
Message-ID: <f8vtcd$clv$1@sea.gmane.org>


Skip Montanaro a ?crit :
>>> In this case there was a bug.  Depending on inputs, sometimes obj
>>> initialized to a class, sometimes an instance of that class.  (I fixed
>>> that too while I was at it.)  The problem was that the use of __call__
>>> obscured the underlying bug by making the instance as well as the class
>>> callable.
>
>> I don't quite get the point here. A concrete example would be welcome.
>
> The bug went something like this:
>
>     obj = some.default_class
>     ...
>     if some_other_rare_condition_met:
>         ... several lines ...
>         obj = some.other_class()

Should that have been some.other_class (without the ()s?).  It is in the 
nature of Python's dynamic typing that mis-typing errors sometimes show up 
later than one would wish.  Hence the need for unit testing.  Consider

i = condition and 1 or '2' # whoops, should have been 2, without the 's
...
k = j * i # j an int; whoops, bad i value passes silently
...
use of k as string raises exception

I do not think __call__ should be specifically blamed for this general 
downside of Python's design.

Terry Jan Reedy





From steve at holdenweb.com  Fri Aug 17 07:04:49 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 17 Aug 2007 07:04:49 -0400
Subject: to property or function in class object
In-Reply-To: <1187317787.848991.242720@i38g2000prf.googlegroups.com>
References: <1187317787.848991.242720@i38g2000prf.googlegroups.com>
Message-ID: <fa3vca$n15$1@sea.gmane.org>

james_027 wrote:
> hi,
> 
> i am very new to python, not knowing much about good design. I have an
> object here for example a Customer object, where I need to retrieve a
> info which has a number of lines of code to get it.
> 
> my question is weather what approach should I use? to use the property
> which is from the python new class style as I understand or simple use
> function that will return the the info I needed.
> 
> class Customer(object):
> 
> current_balance = property(fget=_get_current_balance)
> 
This will need to go down below the definition of _get_current_balance()
  if you want to avoid an error in compilation.

> def _get_current_balance(self):
>    # coding here
> 
> or
> 
> def get_current_balance(self):
>    # coding here
> 
> While both approach would get the job done, I don't know much about
> the performance, benefits, design philosophy between the two approach.
> Any lecture will be very appreciated.
> 
It's pretty much a matter of choice when the method to retrieve the
value doesn't take any arguments. If it *does* take arguments then you
can't use a property.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From robert.vergnes at yahoo.fr  Mon Aug 27 10:18:26 2007
From: robert.vergnes at yahoo.fr (rfv-370)
Date: Mon, 27 Aug 2007 07:18:26 -0700
Subject: How to free memory ( ie garbage collect) at run time with Python
	2.5.1(windows)
Message-ID: <1188224306.863247.127890@50g2000hsm.googlegroups.com>

have made the following small test:

Before starting my test my UsedPhysicalMemory(PF): 555Mb

>>>tf=range(0,10000000)    PF: 710Mb ( so 155Mb for my List)
>>> tf=[0,1,2,3,4,5]             PF: 672Mb (Why? Why the remaining 117Mb is not freed?)
>>> del tf                            PF: 672Mb (unused memory not freed)

So changing the list contents and/or deleting the list changes
nothing...from a memory point of view.

This is a problem as I have several applications/threads competing for
memory share. (ie wxpython app).

So how can I force Python to clean the memory and free the memory that
is not used?


PS: gc.collect() does nothing - To return memory I need to kill my
process (ie the interpreter).

Any ideas is welcome.

Thanx

Robert



From steve at holdenweb.com  Tue Aug 21 07:31:53 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Aug 2007 07:31:53 -0400
Subject: Newbee Question
In-Reply-To: <1187650036.450645.185500@a39g2000hsc.googlegroups.com>
References: <mailman.15.1187620149.26576.python-list@python.org>	<1187621470.484615.7010@i13g2000prf.googlegroups.com>	<mailman.19.1187621934.26576.python-list@python.org>	<1187622390.854759.162320@q3g2000prf.googlegroups.com>
	<1187650036.450645.185500@a39g2000hsc.googlegroups.com>
Message-ID: <46CACD29.8080200@holdenweb.com>

hd1956 at yahoo.com wrote:
[...]
> 
> Thanks for the help. By the way I am trying to learn the python after
> work and on weekends. If it was a dumb question, to this group, I will
> not bother you all again.
> Without help it will take me longer to learn. Thanks
> 
Don't worry about it. There is also a list specifically for learners, 
which you can find out about at

   http://mail.python.org/mailman/listinfo/tutor

Welcome to the Python community!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From jgardner.jonathangardner.net at gmail.com  Tue Aug 21 14:10:41 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Tue, 21 Aug 2007 18:10:41 -0000
Subject: confused about why i get a type error when i call an object's
	method
In-Reply-To: <1187719631.092657.158410@d55g2000hsg.googlegroups.com>
References: <1187719631.092657.158410@d55g2000hsg.googlegroups.com>
Message-ID: <1187719841.367010.293930@e9g2000prf.googlegroups.com>

On Aug 21, 11:07 am, pep... at rumbalski.com wrote:
> I'm confused about why i get a type error when i call an object's
> method.  Here's the example code:>>> class Foo:
>
>         def __init__(self):
>                 self.foo = []
>         def foo(self):
>                 print "in foo!"
>
> >>> f = Foo()
> >>> dir(f)
>
> ['__doc__', '__init__', '__module__', 'foo']
>
> >>> f.foo()
>
> Traceback (most recent call last):
>   File "<pyshell#32>", line 1, in <module>
>     f.foo()
> TypeError: 'list' object is not callable
>
>

You've redefined what "f.foo" means in __init__. It's no longer a
class method, but an attribute of the instance--the list. You can't
call a list.

Do this to show what I mean:

>>> f.foo
[]



From samfeltus at gmail.com  Thu Aug 23 23:03:22 2007
From: samfeltus at gmail.com (SamFeltus)
Date: Fri, 24 Aug 2007 03:03:22 -0000
Subject: Summer Comic Relief in Python
Message-ID: <1187924602.321976.223990@q4g2000prc.googlegroups.com>

SonomaSunshine runs well on Django now...

http://samfeltus.com/django/DjangoSummer.html

(Use flowers to navigate to 10 scenes, no preloader, ~6mb)

SonomaSunshine, the Redneck Riviera's Best Python Powered Folk Art
Server, makes it easy to generate Cartoonish backdrops for Flash
movies in Django...

There will be a debugged alpha version out this week...

Sam the Gardener

:)



From fabioztessitore at libero.it  Sun Aug 12 13:31:42 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 12 Aug 2007 17:31:42 GMT
Subject: Regular Expression Grouping
References: <1186939262.144073.182450@z24g2000prh.googlegroups.com>
Message-ID: <46bf43fe$0$10626$4fafbaef@reader2.news.tin.it>

Il Sun, 12 Aug 2007 17:21:02 +0000, linnewbie ha scritto:

> Fairly new to this regex thing, so this might be very juvenile but
> important.
> 
> I cannot understand and why 'c' constitutes a group here without being
> surrounded by "(" ,")" ?
> 
>>>>import re
>>>> m = re.match("([abc])+", "abc")
>>>> m.groups()
> ('c',)
> 
> Grateful for any clarity.

thera are () outer [], maybe you don't know what do [] mean? or you want 
to know why 'c' and not 'a' or 'b'
bye


From mail at timgolden.me.uk  Wed Aug 22 06:52:38 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Wed, 22 Aug 2007 11:52:38 +0100
Subject: Dispatching default application for file, cross platform.
In-Reply-To: <fah1nc$cqq$02$1@news.t-online.com>
References: <01e101c7e48d$e0e9f860$03000080@hendrik>	<mailman.106.1187774244.32294.python-list@python.org>
	<fah1nc$cqq$02$1@news.t-online.com>
Message-ID: <46CC1576.7060309@timgolden.me.uk>

Peter Otten wrote:
> Tim Golden wrote:
> 
>> Hendrik van Rooyen wrote:
>>> How do I do the equivalent of clicking (in SuSe) or double clicking (in
>>> Windows) on a file?
>>>
>>> In effect I want to tell the OS - take this file and feed it to the
>>> application that is registered for it.
> 
>> os.startfile
> 
> Unfortunately this is Windows-only. 

Good point. I think that Paul Boddie's desktop
module is designed to handle cross-platform issues
for this kind of thing: (Never used it myself)

http://pypi.python.org/pypi/desktop/0.2.3

TJG


From coxy1 at netspace.net.au  Sat Aug 11 16:21:36 2007
From: coxy1 at netspace.net.au (Tony)
Date: Sun, 12 Aug 2007 06:21:36 +1000
Subject: SUCK my HUSBAND'S CUM from my CUNT
Message-ID: <20070811202138.CCBE91345D4@mail.netspace.net.au>

 

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From iddw at hotmail.com  Fri Aug  3 18:36:05 2007
From: iddw at hotmail.com (Dave Hansen)
Date: Fri, 03 Aug 2007 15:36:05 -0700
Subject: regexp problem in Python
In-Reply-To: <1186177312.117581.129910@d55g2000hsg.googlegroups.com>
References: <1186177312.117581.129910@d55g2000hsg.googlegroups.com>
Message-ID: <1186180565.489968.310340@j4g2000prf.googlegroups.com>

On Aug 3, 4:41 pm, Ehsan <ehsan.khod... at gmail.com> wrote:
> I want to find "http://www.2shared.com/download/1716611/e2000f22/
[...]
> I use this pattern :
> "http.*?\.(wmv|3gp).*""
>
> but it returns only 'wmv' and '3gp' instead of "http://www.2shared.com/
> download/1716611/e2000f22/Jadeed_Mlak14.wmv?
> tsid=20070803-164051-9d637d11"
>
> what can I do? what's wrong whit this pattern? thanx for your comments

Just a guess, based on too little information: Try "(http.*?\.(wmv|
3gp).*)"

Regards,

   -=Dave



From billiejoex at gmail.com  Tue Aug 21 20:57:32 2007
From: billiejoex at gmail.com (codesite-noreply)
Date: Tue, 21 Aug 2007 17:57:32 -0700
Subject: Extracting the traceback
In-Reply-To: <mailman.90.1187741360.32294.python-list@python.org>
References: <1187740411.848743.151960@x35g2000prf.googlegroups.com>
	<mailman.90.1187741360.32294.python-list@python.org>
Message-ID: <1187744252.157335.91630@x40g2000prg.googlegroups.com>

On 22 Ago, 02:09, "Evan Klitzke" <e... at yelp.com> wrote:
> On 8/21/07, billiejoex <gne... at gmail.com> wrote:
>
>
>
> > Hi there,
> > I'm facing a case where I need to get the traceback outptut when
> > occurring an exception.
> > I solved such problem by using traceback module in conjunction with
> > StringIO:
>
> > import StringIO, traceback
> > try:
> >     raise Exception
> > except:
> >     f = StringIO.StringIO()
> >     traceback.print_exc(file=f)
> >     print f.getvalue()
>
> > ... but this seems a little poor to me since I first put output into
> > the StringIO.StringIO(), then I get it back by using getvalue() on
> > it.
> > Is there a way to avoid the use of StringIO and get such output
> > without using such (useless) additional step?
>
> If you just want to print the output (as in your example), you can use
> file=sys.stdout or file=sys.stderr in the call to print_exc. If you
> want to store the traceback into a string for some other purpose (e.g.
> logging, email notifications) I believe that you must use a StringIO
> object.
>
> --
> Evan Klitzke <e... at yelp.com>

Unfortunately I have to pass the output to a function which prints the
passed string both on screen and into a log file.
Anyway, not too much important. I'll use StringIO if there's no other
solution.

Thanks



From ldo at geek-central.gen.new_zealand  Fri Aug 31 01:31:18 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 31 Aug 2007 17:31:18 +1200
Subject: Symbolic Link
References: <1187475296.173269.263080@k79g2000hse.googlegroups.com>	<iwWxi.28394$RX.20505@newssvr11.news.prodigy.net>	<1187555373.202634.163160@57g2000hsv.googlegroups.com>
	<1187646982.760523.195750@i38g2000prf.googlegroups.com>
	<mailman.87.1187737527.32294.python-list@python.org>
Message-ID: <fb88uh$ev8$3@lust.ihug.co.nz>

In message <mailman.87.1187737527.32294.python-list at python.org>, Ian Clark
wrote:

> My question would be why a symbolic link? Why not a hard link?

Because of the potential for confusion. For instance, modifying the file
without realizing that some other place expects to see the unmodified
version.


From iclark at mail.ewu.edu  Thu Aug  2 13:42:59 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Thu, 02 Aug 2007 10:42:59 -0700
Subject: problems playing with dates from any month.
In-Reply-To: <f81479dd0708021031s208afc54y59780b19889d268b@mail.gmail.com>
References: <f81479dd0708021031s208afc54y59780b19889d268b@mail.gmail.com>
Message-ID: <f8t533$6n6$1@sea.gmane.org>

krishnakant Mane wrote:
> hello,
> I have a very strange problem and I can't find any solution for that.
> I am working on an accounting package which I wish to develop in python.
> the simple problem is that I want to knoe how I can know if the given
> date is the nth day of a month.
> for example if a customer is supposed to pay his installment on every
> 5th of all months,
> I want to know if today is the fifth day (jan the fifth, feb the fifth
> etc) for any given month.
> I have not found any such function.
> if I have looked (or over looked ) in the wrong places I am really sorry.
> secondly I also want to know the way in which I can convert a given
> string to a date object.
> for example if I have a string "29/09/2005", I know it is a valid date
> although it is in a string form.
> now I want to convert the above string into a real date object.
> how can I cast it this way?
> regards,
> Krishnakant.

http://docs.python.org/lib/node85.html

Then it's just:

if date_obj.day == 5:
     print 'It's the fifth day of the month'

Ian



From tjreedy at udel.edu  Thu Aug  2 17:12:27 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 2 Aug 2007 17:12:27 -0400
Subject: __call__ considered harmful or indispensable?
References: <18098.8872.263489.36952@montanaro.dyndns.org>
Message-ID: <f8thbp$h4o$1@sea.gmane.org>


<skip at pobox.com> wrote in message 
news:18098.8872.263489.36952 at montanaro.dyndns.org...
| I'm wondering, are there some general cases where __call__ methods of
| a user-defined class are simply indispensable?

One classical example (untested, based on memory of posted code):

class memoize():
    def __init__(self, func):
        self.func = func
        self.memo = {}
    def __call__(self, *args):
        try:
            return self.memo[args]
        except KeyError:
            res = self.func(*args)
            self.memo[args] = res
            return res

Before Py2.2 closures, I might have called this indispensible.  Since no 
attributes are rebound, this can now be written

def memoize(func):
    memo = {}
    def _(*args)
        try:
            return memo[args]
        except KeyError:
            res = func(*args)
            memo[args] = res
            return res
    return _

This is a bit simpler, but one gives up both direct external access to the 
memo dict and any other methods, such as a customized
    def __repr__(self):
        return "memoize wrapper for %s" % self.func
or possibly a method to empty (or partially empty) the memo dict.

If I were writing about memoization for programmers in general, just using 
Python, I would give both forms since many languages (including Py2.1-) do 
not have both forms, even if they have one.

Terry Jan Reedy





From pyth0nc0d3r at gmail.com  Tue Aug 28 11:13:32 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Tue, 28 Aug 2007 09:13:32 -0600
Subject: Python Classes
In-Reply-To: <8AC0DE08-89C7-4647-93FE-CC9ED6102C98@myemma.com>
References: <eb79828c0708272204y3b9f6503x843c66eb2ecb685b@mail.gmail.com>
	<8AC0DE08-89C7-4647-93FE-CC9ED6102C98@myemma.com>
Message-ID: <eb79828c0708280813tfa23965sd0dc24420b8fd20b@mail.gmail.com>

Ok thanks I'll try remembering it.

On 8/28/07, Erik Jones <erik at myemma.com> wrote:
>
> On Aug 28, 2007, at 12:04 AM, Lamonte Harris wrote:
>
> > How come you have to set the initialized created variables to equal
> > the parameters, shouldn't that be default?
> >
> > class testing:
> >          def __init__(self,testing):
> >                    self.testing = testing
> > x = testing("testing")
> > print x.testing
> >
> >
> > How come self.testing = testing
> >
> > Can someone explain that in more detail, just confused on why you
> > have to set it up like that.
> > --
>
> Simple Answer:
>
> Because language should never set variable values "by default".
> That's what programmers are for.  There may be application domains
> where *some* defaulting behavior makes sense, but that's what
> frameworks and DSLs are for.
>
> Erik Jones
>
> Software Developer | Emma(r)
> erik at myemma.com
> 800.595.4401 or 615.292.5888
> 615.292.0777 (fax)
>
> Emma helps organizations everywhere communicate & market in style.
> Visit us online at http://www.myemma.com
>
>
>
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From fabiofz at gmail.com  Mon Aug 13 12:09:45 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Mon, 13 Aug 2007 13:09:45 -0300
Subject: Eclipse/PyDev question
In-Reply-To: <1187011251.632213.249450@g4g2000hsf.googlegroups.com>
References: <1186998539.030727.279330@g4g2000hsf.googlegroups.com>
	<1187005485.137101.43130@l70g2000hse.googlegroups.com>
	<1187006912.494455.86830@w3g2000hsg.googlegroups.com>
	<1187011251.632213.249450@g4g2000hsf.googlegroups.com>
Message-ID: <cfb578b20708130909x4a867f4foe913cf5498335036@mail.gmail.com>

On 8/13/07, king kikapu <aboudouvas at panafonet.gr> wrote:
>
> Ah, i forgot another one:
>
> as any project evolves, you need to organize it in directories. So, i
> have a project named "Dev" and Eclipse has provided me (in Navigator)
> with "Dev" and "Src". Inside Src i put my .py files. Let's say that i
> want to create a directory there (will i make it in "Src" or in "Dev")
> to put other .py files. I tried adding a "Folder", i also tried to add
> a "Pydev Source Folder", either way i cannot refer to these files from
> a .py located in Src directory with the usual "from folderA
> import"...It does not understand the folder structure and i am pretty
> sure i am missing something obvious here...
>

You have to set as source folders the exact same folders you'd usually put
into your pythonpath (that's one level before the module you're going to
import). Details on how to do that can be found at:
http://fabioz.com/pydev/manual_101_root.html

Cheers,

Fabio
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From kyosohma at gmail.com  Mon Aug 27 09:39:56 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 27 Aug 2007 06:39:56 -0700
Subject: Best open source Python online *CHAT* apps?
In-Reply-To: <1188202360.562850.24860@e9g2000prf.googlegroups.com>
References: <1188202360.562850.24860@e9g2000prf.googlegroups.com>
Message-ID: <1188221996.849125.109130@y42g2000hsy.googlegroups.com>

On Aug 27, 3:12 am, "seber... at spawar.navy.mil"
<seber... at spawar.navy.mil> wrote:
> Best open source Python online chat apps?
>
> I believe there are a few PHP online chat apps to allow people to have
> conversation
> via a web server but a Python one would soothe the soul.
>
> Any available?
>
> Thanks,
>
> Chris

Dunno, but I see Gozerbot just had another release. Check it out. I
also found this link, but my business blocks it so I'm not sure how
useful it is: http://www.bigwebmaster.com/Python/Scripts_and_Programs/Chat_Scripts/

Mike



From conra2004 at yahoo.com  Tue Aug 21 09:27:30 2007
From: conra2004 at yahoo.com (yadin)
Date: Tue, 21 Aug 2007 06:27:30 -0700
Subject: 3D plot of 50 lines kwing end points using VTK
Message-ID: <1187702850.063661.139910@r29g2000hsg.googlegroups.com>

does anyone know how to plot multimple lines like lets say... 50
lines
each liine is defined beetween two given points using VTK. a litlle
example will be ok
please on python and VTK
thank you



From horpner at yahoo.com  Wed Aug  8 14:00:59 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 08 Aug 2007 18:00:59 GMT
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
	<46B8626A.2070303@bigfoot.com>
	<mailman.1726.1186537161.22759.python-list@python.org>
	<5hsoi3F3mlni2U1@mid.individual.net> <f9ceb9$jsm$1@sea.gmane.org>
	<1186581124.3383.55.camel@dot.uniqsys.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
Message-ID: <slrnfbk19k.20o.horpner@FIAD06.norwich.edu>

On 2007-08-08, Steve Holden <steve at holdenweb.com> wrote:
> Carsten Haese wrote:
>> On Wed, 2007-08-08 at 08:52 -0400, Steve Holden wrote:
> [...]
>> The problem is your ambiguous use of the word "assignment." In
>> the sense of the Language Reference, "any assignment to y" is
>> a simple assignment that always modifies a namespace and never
>> modifies an object. In that sense, the mutability of None
>> really isn't the issue.
>> 
>> If you use the broader sense in which "assignment" includes
>> augmented assignments, the mutability of None does become
>> relevant.
>> 
>> I agree that greg's delivery was unduly disrespectful, but I
>> think he was making a valid point.
>> 
>> Hope this helps clear up the confusion.
>> 
>> Best regards,
>
> And this is why we should all be using the term "binding",
> which is normal in Python. I'll try to be more careful in
> future.

The Python Language Reference seems a little confused about the
terminology.

  3.4.7 Emulating numeric types
  6.3.1 Augmented assignment statements

The former refers to "augmented arithmetic operations", which I
think is a nice terminology, since assignment is not necessarily
taking place. Then the latter muddies the waters.

So Steve was both wrong and right, depending on the terminology.
I tend to think the world would be a better place if he'd been
right.

-- 
Neil Cerutti
The church will host an evening of fine dining, superb entertainment, and
gracious hostility. --Church Bulletin Blooper


From ndbecker2 at gmail.com  Wed Aug  8 08:21:43 2007
From: ndbecker2 at gmail.com (Neal Becker)
Date: Wed, 08 Aug 2007 08:21:43 -0400
Subject: mmm-mode, python-mode and doctest-mode?
References: <46B8341E.2090805@gradient.cis.upenn.edu>
Message-ID: <f9ccgo$dp0$1@sea.gmane.org>

Anyone testing on xemacs?  I tried it, and C-c C-c sent xemacs into an
infinite loop (apparantly).



From horpner at yahoo.com  Mon Aug  6 06:27:22 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 06 Aug 2007 10:27:22 GMT
Subject: Misleading wikipedia article on Python 3?
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
Message-ID: <eICti.37400$G23.15165@newsreading01.news.tds.net>

On 2007-08-06, Paul Rubin <http> wrote:
> Carsten Haese <carsten at uniqsys.com> writes:
>> For instance, if you never use print statements in your code, you won't
>> notice that print is becoming a function. If you do, you'll have to make
>> appropriate accommodations.
>
> Why on earth did they make this change?  It just seems
> gratuitous.  Is the assert statement also being changed?  Are
> they going to update all the docs that say that the yield
> statement works like the print statement?

>From the footnotes of PEP 3100:

http://mail.python.org/pipermail/python-dev/2005-September/056154.html
http://www.python.org/dev/peps/pep-3105

-- 
Neil Cerutti


From raims at dot.com  Mon Aug 13 05:21:05 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Mon, 13 Aug 2007 11:21:05 +0200
Subject: verify whether "str" is still callable in Python 2.5.1
References: <1186994287.527549.119170@19g2000hsx.googlegroups.com>
Message-ID: <1i2s7ep.1dmyyzvygpp6oN%raims@dot.com>

Ge Chunyuan <hhygcy at gmail.com> wrote:
> Once use ActivePython latest version for Python 2.5.1.
> I happened to find function "str" is not callable, but it is available
> for Python 2.5.
> Can anybody give some comments about it?

I don't really understand what your asking. str is a callable, it has
always been AFAIK, since it's a type constructor, like int()

In [1]: callable(str)
Out[1]: True

In [2]: str()
Out[2]: ''


-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From rdm at rcblue.com  Fri Aug 10 13:57:22 2007
From: rdm at rcblue.com (Dick Moores)
Date: Fri, 10 Aug 2007 10:57:22 -0700
Subject: Puzzled by "is"
In-Reply-To: <87zm1042f0.fsf@benfinney.id.au>
References: <20070809194105.39BD11E400A@bag.python.org>
	<f9frbl$dps$1@sea.gmane.org>
	<mailman.1814.1186692638.22759.python-list@python.org>
	<87zm1042f0.fsf@benfinney.id.au>
Message-ID: <20070810175735.B469C1E400A@bag.python.org>

At 06:13 PM 8/9/2007, Ben Finney wrote:
>Content-Transfer-Encoding: base64Grzegorz 
>S??odkowicz <jergosh at wp.pl??]\?????]  ???@st 
>theorisation but I'd rather expect the interpreter
> > simply not to create a second tuple while there already is an
> > identical one.
>
>Others have already said that it's an implementation optimisation,
>which seems to partly answer your question.
>
>It's important to also realise that the language is *deliberately*
>non-committal on whether any given value will have this behaviour;
>that is, it's entirely left to the language implementation which
>optimisation trade-offs to make, and the language user (that's you and
>I) should *not* expect any particular behaviour to hold between
>different implementations.

I'm not clear on the meaning of "implementations" 
here.  Would 2.5 for Windows, Mac, Linux all be 
different implementations? Would Iron Python be another? ActivePython?

Thanks,

Dick




From kyosohma at gmail.com  Wed Aug 15 10:54:55 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 15 Aug 2007 07:54:55 -0700
Subject: ming on win32 anyone ? [help a noob]
In-Reply-To: <1187189173.036327.65360@r29g2000hsg.googlegroups.com>
References: <%QCwi.14541$rr5.1213@newsfe1-win.ntli.net>
	<1187189173.036327.65360@r29g2000hsg.googlegroups.com>
Message-ID: <1187189695.581003.317920@q4g2000prc.googlegroups.com>

On Aug 15, 9:46 am, "programmer... at gmail.com"
<programmer... at gmail.com> wrote:
> On Aug 15, 8:03 am, "daz.diamond" <s... at spam.com> wrote:
>
> > hoping someone can help ...
>
> > how do I install ming (with python) on win32? have downloaded the tar.gz
> > of ming-0.3.0 which doesn't have a handy self-installer, and I'm
> > absolutely foxed as to what to do next ... the install instructions in
> > the package seem to be linux oriented, which to me may as well be in greek
>
> > any clues much appreciated, thx
>
> > daz
>
> I don't know what you've downloaded, but it does not sound like the
> right thing, err ming.  The installer found here is 5.1.3.http://sourceforge.net/project/showfiles.php?group_id=2435
>
> Maybe you should consider cygwin?
>
> jw

I think the OP is referring to this: http://ming.sourceforge.net/

If so, it looks like it needs manual compilation using a C/C++
compiler of some sort.

Mike



From gmcalendar at gmail.com  Thu Aug 23 16:49:24 2007
From: gmcalendar at gmail.com (gmcalendar at gmail.com)
Date: Thu, 23 Aug 2007 20:49:24 -0000
Subject: simple spider in python
In-Reply-To: <1187890751.871660.275320@z24g2000prh.googlegroups.com>
References: <1187876014.845912.236690@e9g2000prf.googlegroups.com>
	<1187879398.007797.128510@i13g2000prf.googlegroups.com>
	<1187880988.813113.20350@l22g2000prc.googlegroups.com>
	<sll0q4-79t.ln1@lairds.us>
	<1187890751.871660.275320@z24g2000prh.googlegroups.com>
Message-ID: <1187902164.596545.101050@q3g2000prf.googlegroups.com>


> As to the Google API key issue, I was unaware of that. Very annoying
> of them to stop that service. PyGoogle will basically be useless.

well, i think that they deserve people moving toward yahoo's API...
check this out: http://pysearch.sourceforge.net/
it's basically the same thing as pygoogle BUT working with google's
competitor. it seems like internet has its own built-in antibodyes!
^__^

cheers!



From martin at v.loewis.de  Thu Aug 23 15:59:43 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 23 Aug 2007 21:59:43 +0200
Subject: MsiLib
In-Reply-To: <mailman.172.1187876423.32294.python-list@python.org>
References: <mailman.172.1187876423.32294.python-list@python.org>
Message-ID: <46CDE72F.2090009@v.loewis.de>

Charlie schrieb:
> Thank you everybody for your help. It finally runs without errors and I
> should be able to use this as I figure out more of it. I am curios if
> there is any idea as to when GetString will be implemented?

If I can find the time, it may be for Python 2.6. If not, Python 2.7,
3.1, or so. Faster if a patch is contributed.

Regards,
Martin


From half.italian at gmail.com  Mon Aug 27 15:24:31 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: Mon, 27 Aug 2007 12:24:31 -0700
Subject: Socket - gaierror
Message-ID: <1188242671.182072.130150@r23g2000prd.googlegroups.com>

Hi all,

I'm having trouble with the socket module resolving a hostname.  It
seems like this is a system level problem, but I'm not even sure where
to start.  I can ping the smtp server by name and IP, but when
smtp.SMTP("theHost") tries to get the hostname, it keeps giving me the
following error:

  File "bin/program.py", line 123, in notify
    smtp = smtplib.SMTP("theHost")

  File "/usr/lib/python2.4/smtplib.py", line 255, in __init__
    addr = socket.gethostbyname(socket.gethostname())

gaierror: (-2, 'Name or service not known')

I tried changing to a different smtp server, using an ip instead of a
host name.  I could ping both boxes by name oor IP.

any ideas?

~Sean



From ldo at geek-central.gen.new_zealand  Sat Aug 18 00:34:22 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 18 Aug 2007 16:34:22 +1200
Subject: python socket usage
References: <mailman.2046.1187250159.22759.python-list@python.org>
Message-ID: <fa5sns$7fl$1@lust.ihug.co.nz>

In message <mailman.2046.1187250159.22759.python-list at python.org>, O?uz
Yar?mtepe wrote:

> Is it possible to send a data object like a tuple or a list in socket
> programming?

You'll have to define a bytestream encoding to send over the connection.

I recently wrote up some Python code
<http://www.codecodex.com/wiki/index.php?title=Simple_Chunk_Protocol_Format>
based on the old "chunk" idea from the Amiga days. Feel free to have a read
and see if it makes sense to you.


From bj_666 at gmx.net  Tue Aug 28 01:00:05 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 28 Aug 2007 05:00:05 GMT
Subject: XML File -- dictionary edit/search
References: <1188263724.306539.181980@y42g2000hsy.googlegroups.com>
Message-ID: <5jhoekF3u17i9U1@mid.uni-berlin.de>

On Mon, 27 Aug 2007 18:15:24 -0700, -b wrote:

> I am trying to put together a python program that will be able to ask
> for a word and its definition, then save that information into an xml
> file for reference. I am not down right set on the file being in xml
> format, but xml is the first thing that comes to mind, since I do not
> want to use a MySQL database. I think xml will be easy to search and
> return a word's definition--another reason why xml comes to mind first
> after MySQL databases. Please, if you have any suggestions to what
> python-xml libraries I might use to program this small app with, then
> by all means voice your thoughts. Thank you very much for your time.

`ElementTree` is a good XML library and from Python?2.5 on it is in the
standard library.  There are others, even in the standard library.  Have
you looked in the documentation?

I don't think XML is a good storage format here.  Looks to complicated to
use a format suited for deeply nested structures for a simple flat
database.  Maybe CSV is enough here.  Take a look at the `csv` module in
the standard library.  Or use SQLite.  From Python?2.5 on there's even
support for SQLite in the standard library.

Ciao,
	Marc 'BlackJack' Rintsch


From david at boddie.org.uk  Sun Aug  5 09:35:53 2007
From: david at boddie.org.uk (David Boddie)
Date: Sun, 05 Aug 2007 15:35:53 +0200
Subject: Best programs written completly in Python
Message-ID: <200708051535.53978.david@boddie.org.uk>

On Sun Aug 5 14:44:55 CEST 2007, Franz Steinh?usler wrote:

> I'm only interested to have a list, or even help to 
> extend an existing one.

If the main criterion is that the programs are written in Python then
surely the PythonInfo Wiki is the place for such a list:

  http://wiki.python.org/moin/Applications

May I suggest that you extend this one?

David


From use-revolution-bounces at lists.runrev.com  Fri Aug 17 21:40:01 2007
From: use-revolution-bounces at lists.runrev.com (use-revolution-bounces at lists.runrev.com)
Date: Fri, 17 Aug 2007 20:40:01 -0500
Subject: Your message to use-revolution awaits moderator approval
Message-ID: <mailman.3374.1187401201.3304.use-revolution@lists.runrev.com>

Your mail to 'use-revolution' with the subject

    Returned mail: see transcript for details

Is being held until the list moderator can review it for approval.

The reason it is being held:

    Post by non-member to a members-only list

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.  If you would like to cancel
this posting, please visit the following URL:

    http://lists.runrev.com/mailman/confirm/use-revolution/3f697cbe8e6e256a948b97c962c723f61075fc87



From tjreedy at udel.edu  Thu Aug  2 16:36:08 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 2 Aug 2007 16:36:08 -0400
Subject: Determining if file is valid image file
References: <1186064098.587590.91210@g4g2000hsf.googlegroups.com><1186064275.652416.250540@d55g2000hsg.googlegroups.com><f8sqb8$1t6$1@nemesis.news.tpi.pl><1186065645.879720.27720@q75g2000hsh.googlegroups.com>
	<f8tbd6$rnh$1@nemesis.news.tpi.pl>
Message-ID: <f8tf7m$9uc$1@sea.gmane.org>


"Jarek Zgoda" <jzgoda at usun.pl> wrote in message 
news:f8tbd6$rnh$1 at nemesis.news.tpi.pl...
Andr? napisa?(a):

>>>> Other than installing PIL, is there a "simple" way using Python only
>>>> to determine if a file is a valid image file?
[...]
> Be aware that broken images (i.e. partially downloaded) in many cases
> pass the imghdr.what() test.

To put it another way, the only way to determine whether a coded file is 
valid may be to decode it.  And even then, it may be corrupted in the sense 
that the decoded version may have artifacts not in the original.  I have 
seen the latter both in jpeg images and movie DVDs.

tjr





From enleverlesX.XmcX at XmclaveauX.com  Wed Aug 29 09:19:27 2007
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI (MVP))
Date: Wed, 29 Aug 2007 15:19:27 +0200
Subject: Pythonwin Install COM exceptions on Windows Vista Ultimate
References: <mailman.95.1188374497.28954.python-list@python.org>
Message-ID: <46d578dc$0$25911$ba4acef3@news.orange.fr>

Hi!

Perso, on Vista, I :
  - deactive UAC
  - deactive firewall (I have a rooter)
  - run all like Administrator
  - install all in other DIR than "Program Files"

Result :  no problem.




From mkent at acm.org  Fri Aug 31 02:07:54 2007
From: mkent at acm.org (Mike Kent)
Date: Fri, 31 Aug 2007 02:07:54 -0400
Subject: What's on at APL 2007, Montreal, October 21, (Tutorials) 22,
	23 (Program)
Message-ID: <5jpphrFof1qU1@mid.individual.net>

( Details and abstracts coming to the APL 2007 web page

       http://www.sigapl.org/apl2007.html

   shortly.  In the meantime ... )


Tutorials and workshops

     Introduction to APL (Ray Polivka)

     OO for APLers, APL for OOers (Dan Baronet)

     ... others in the works


Presentations

    No Experience Necessary:
    Hire for Aptitude - Train for Skills
         (Brooke Allen)

     Compiling APL with APEX
         (Robert Bernecky)

     APL, Bioinformatics, Cancer Research
         (Ken Fordyce)

     Generic Programming on Nesting Structure
         (Stephan Herhut, Sven-Bodo Scholz, Clemens Grelck)

     Interactive Array-Based Languages and Financial Research
         (Devon McCormick)

     Array vs Non-Array Approaches to Programming Problems
         (Devon McCormick)

     Design Issues in APL/OO Interfacing
         (Richard Nabavi)

     Arrays of Objects, or Arrays within Objects
         (Richard Nabavi)

     Competing, with J
         (John Randall)



Plus representatives of vendors:

	Dyalog  --  IBM  --  MicroAPL


From jon at turnthepage.org  Wed Aug  8 09:57:50 2007
From: jon at turnthepage.org (Jon Rosebaugh)
Date: Wed, 8 Aug 2007 08:57:50 -0500
Subject: Web based Reporting tool for Python
References: <1186460956.945148.162610@k79g2000hse.googlegroups.com>
	<mailman.1722.1186522221.22759.python-list@python.org>
	<1186547726.383996.291360@d55g2000hsg.googlegroups.com>
Message-ID: <2007080808575016807-jon@turnthepageorg>

On 2007-08-07 23:35:26 -0500, Madhu Alagu <almadhu at gmail.com> said:

> Thanking so much for all the informations and links.I would like to
> use Mako Templates(www.makotemplates.org).I like to use simple and
> python default module...

Mako is an excellent template system, but you'll have a lot of work to 
do making it into a reporting system.



From bayesianlogic at acm.org  Fri Aug 10 14:08:20 2007
From: bayesianlogic at acm.org (ekzept)
Date: Fri, 10 Aug 2007 11:08:20 -0700
Subject: pat-match.lisp or extend-match.lisp in Python?
Message-ID: <1186769300.157903.90160@z24g2000prh.googlegroups.com>

anyone have either pat-match.lisp or extend-match.lisp redone in
Python?  or how about knowing where there might be such a thing?

sources:

   http://norvig.com/paip/patmatch.lisp

   http://www.cs.northwestern.edu/academics/courses/325/programs/extend-match.lisp



From bj_666 at gmx.net  Thu Aug 30 04:58:30 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 Aug 2007 08:58:30 GMT
Subject: Python doesn't see the directories I create
References: <ldvBi.293202$LE1.92748@newsfe13.lga>
Message-ID: <5jnf5lFdmbcU4@mid.uni-berlin.de>

On Thu, 30 Aug 2007 04:30:50 -0400, mr_gadget wrote:

> C:\>python -c "import os; print os.path.exists('C:\enhancement\rawfiles')"
> 
> False
> 
> C:\>python -c "import os; print os.path.exists('C:\\enhancement\\rawfiles')"
> 
> True

The backward slash has a special meaning in string literals.  It is used
to escape special character.  One such sequence is '\r' which is *one*
character, namely the return character.  To insert *one* backslash it has
to be protected by another backslash or the string literal may be prefixed
by an 'r' to tell the compiler that backslashes have no special meaning in
that raw string literal.

In [23]: len('\r')
Out[23]: 1

In [24]: len('\\')
Out[24]: 1

In [25]: len(r'\r')
Out[25]: 2

In [26]: len(r'\\')
Out[26]: 2

Ciao,
	Marc 'BlackJack' Rintsch


From silfheed at gmail.com  Tue Aug 21 15:18:00 2007
From: silfheed at gmail.com (Silfheed)
Date: Tue, 21 Aug 2007 19:18:00 -0000
Subject: Adjusting the names of custom exceptions (since raising strings
	is deprecated)
In-Reply-To: <5qxyi.18719$eY.12647@newssvr13.news.prodigy.net>
References: <1187672085.263963.157470@z24g2000prh.googlegroups.com>
	<5qxyi.18719$eY.12647@newssvr13.news.prodigy.net>
Message-ID: <1187723880.146487.36250@l22g2000prc.googlegroups.com>

On Aug 21, 1:32 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Silfheed wrote:
> > Heyas
>
> > So this probably highlights my lack of understanding of how naming
> > works in python, but I'm currently using FailUnlessRaises in a unit
> > test and raising exceptions with a string exception.  It's working
> > pretty well, except that I get the deprecation warning that raising a
> > string exception is going to go away.  So my question is, how do I
> > mangle the name of my exception class enough that it doesnt stick the
> > name of the module before the name of the exception?
>
> > Namely I'd like to get the following
>
> > ***
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in ?
> > MyError: 'oops!'
>
> > instead of
>
> > ***
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in ?
> > __main__.MyError: 'oops!'
>
> > (or even test_thingie.MyError as is usually the case).
>
> > Creating a class in a separate file and then doing
>
> > ***
> > from module import MyError
> > raise MyError
>
> > still gives
>
> > ***
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > module.MyError
>
> > Anyway, any help appreciated.
>
> Would it be cheating to use metaclasses?
>
> # myModule.py
> class ExampleType(type):
>    def __repr__(cls):
>      return cls.__name__
>
> class ExampleError(Exception):
>    __metaclass__ = ExampleType
>    __name__ = 'ExampleError'
>    def __repr__(self):
>      return 'ExampleError'
>
> py> import myModule
> py> raise myMo
> myModule      myModule.py   myModule.pyc  myModule.py~
> py> raise myModule.Ex
> myModule.ExampleError  myModule.ExampleType
> py> raise myModule.ExampleError
> ------------------------------------------------------------
> Traceback (most recent call last):
>    File "<ipython console>", line 1, in <module>
> ExampleError
>
> James

It doesnt appear to work for me.
Same exact code as you have but I still get:

>>> raise myModule.ExampleError
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
myModule.ExampleError



From nospam at nowhere.com  Fri Aug 17 20:55:47 2007
From: nospam at nowhere.com (DavidM)
Date: 18 Aug 2007 12:55:47 +1200
Subject: python video editing libs
Message-ID: <46c64393$1@news.orcon.net.nz>

Hi,

Does anyone know of any python or python-wrapped libs for video editing?

My requirements:
 - open video files in any of the popular containers (avi, mov, ogg, flv
   etc) and all the popular codecs (mpeg3, theora, mpeg2 etc) and audio
   codecs (raw, wav, mp3 etc)
 - get an abstract video clip object on opening such a file
 - query the clip object to determine stuff like length, framerate, size
   etc
 - iterate through all the frames, and get a frame object with each frame
 - with a frame object, be able to access individual pixels, add graphic
   images (eg, via PIL), export frame to graphics file (eg jpeg)
 - with video clip object, be able to change framerate, insert/remove
   frames etc, and render out with desired a-v codecs and container
 - good well-documented API, preferably some usage examples

Does anything like this exist?

Cheers
David


From xmikedavis at gmail.com  Fri Aug 24 17:06:21 2007
From: xmikedavis at gmail.com (garage)
Date: Fri, 24 Aug 2007 21:06:21 -0000
Subject: Regular expression use
In-Reply-To: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
Message-ID: <1187989581.752849.23840@m37g2000prh.googlegroups.com>

I work in print (book) production and i regularly use regular
expressions to parse .eps (encapsulated postscript) files for
incorrect specifications (8-bit vs. ASCII, etc), bad fonts and the
like.  Just to ensure that what's been submitted to me will actually
end up on the page.



From steve at holdenweb.com  Wed Aug  8 21:26:51 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Aug 2007 21:26:51 -0400
Subject: Something in the function tutorial confused me.
In-Reply-To: <5hv705F3mk67nU1@mid.individual.net>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>	<46B8626A.2070303@bigfoot.com>	<mailman.1726.1186537161.22759.python-list@python.org>	<5hsoi3F3mlni2U1@mid.individual.net>	<mailman.1737.1186577596.22759.python-list@python.org>
	<5hv705F3mk67nU1@mid.individual.net>
Message-ID: <f9dqgo$5ev$1@sea.gmane.org>

greg wrote:
> Steve Holden wrote:
> 
>> For some reason your reply got right up my nose,
> 
> I'm sorry about that. Sometimes it's hard to judge the
> level of experience with Python that a poster has. In
> discussions about this particular topic, often it turns
> out that the person is a newcomer to Python who is
> using the wrong mental model of assignment, and your
> comment about None being immutable suggested that this
> is what was going on. If I was mistaken about that,
> then I apologise.
> 
No worries. I've been subjected to far worse.

> While it may not have been what you meant, what you
> *seemed* to be saying is that the result of a (plain)
> assignment somehow depends on what was previously
> bound to the name being assigned. I was just trying
> to point out that this is not true.
> 
I must have expressed myself badly, then.

> The reason I suggested trying an example is that it
> can be hard to talk about these things clearly when
> you're not sure whether the words you're using, such
> as "assignment", mean the same thing to the person
> on the other end. The interpreter always interprets
> things unambiguously.
> 
Sure. Don't worry, I was pretty sure it was as much me as you. Otherwise 
I'd doubtless have been more obnoxious :-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From cjankowski at hbr-inc.com  Tue Aug  7 10:09:07 2007
From: cjankowski at hbr-inc.com (cjankowski at hbr-inc.com)
Date: Tue, 07 Aug 2007 07:09:07 -0700
Subject: RTF 2 Tiff
In-Reply-To: <tLOdnWiKvpsq4yrbnZ2dnUVZ_qOknZ2d@comcast.com>
References: <1186427712.284976.207560@d30g2000prg.googlegroups.com>
	<tLOdnWiKvpsq4yrbnZ2dnUVZ_qOknZ2d@comcast.com>
Message-ID: <1186495747.958628.198070@g12g2000prg.googlegroups.com>

On Aug 6, 4:04 pm, Larry Bates <larry.ba... at websafe.com> wrote:
> cjankow... at hbr-inc.com wrote:
> > Hi all,
> > I am trying to convert an RTF file to a Tiff image using Python.  This
> > process will convert several hundred images daily.  Currently I am
> > able to get the RTF file into a text format using Rtf2Txt.py, but I
> > loose the images contained in the RTF file.  I have the same problem
> > when I convert to .HTML using Rtf2Html.py.  I do not have a sample
> > that I can share because of HIPPA regulations.  Can anyone please help
> > me?
>
> > Thanks,
>
> > Chris J.
>
> Google turns up lots of solutions, but you didn't tell us what operating system
> you are running on.  Most likely you will want to automate one of the off-the
> shelf solutions rather than trying to roll your own.
>
> -Larry

We are running Windows Operating Systems.  I was not able to find
anything that actually would convert the images via command line or
interface.  I tried a couple of boxed solutions and they only convert
the text portions.  I would perfer to not reinvent the wheel.  I did
find someone has created RTF's using Python and images, but I need to
reverse the process.

Thanks again,

Chris J.



From horpner at yahoo.com  Wed Aug 22 08:29:24 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 22 Aug 2007 12:29:24 GMT
Subject: for statement on empty iterable
References: <1187760507.951994.50310@q4g2000prc.googlegroups.com>
	<7xabsk3zgm.fsf@ruckus.brouhaha.com>
	<1187761270.713307.224570@i38g2000prf.googlegroups.com>
	<7xejhw15r9.fsf@ruckus.brouhaha.com>
	<1187761957.636211.107060@x40g2000prg.googlegroups.com>
	<7xd4xgnldp.fsf@ruckus.brouhaha.com>
	<1187765372.361411.249990@z24g2000prh.googlegroups.com>
	<5j2679F3s7lbpU1@mid.uni-berlin.de>
Message-ID: <slrnfcoam7.14g.horpner@FIAD06.norwich.edu>

On 2007-08-22, Diez B. Roggisch <deets at nospam.web.de> wrote:
> While it is desireable to not only write working, but also
> aesthetically pleasing code, as a beginner you shouldn't worry
> too much. The sense of aesthetics develops with time. Important
> is to try and grasp the idioms of the language, around here
> ofter referred to as "beeing pythonic."

It's hard to keep up with the new buzzwords that keep popping up
in this group.

-- 
Neil Cerutti
A billion here, a billion there, sooner or later it adds up to real money.
--Everett Dirksen


From grahn+nntp at snipabacken.dyndns.org  Sun Aug 12 16:18:54 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 12 Aug 2007 20:18:54 GMT
Subject: Querying Graphics Card Name
References: <1186686984.160312.175270@i13g2000prf.googlegroups.com>
	<5i1f4cF3mbqqdU1@mid.individual.net>
	<1186696734.059152.131080@d30g2000prg.googlegroups.com>
Message-ID: <slrnfbuqq7.52s.grahn+nntp@frailea.sa.invalid>

On Thu, 09 Aug 2007 21:58:54 -0000, Benjamin Goldenberg <bgoldenberg at gmail.com> wrote:
> On Aug 9, 3:26 pm, Bjoern Schliessmann <usenet-
> mail-0306.20.chr0n... at spamgourmet.com> wrote:
>> Benjamin Goldenberg wrote:
>> > I would like to find out the name of the graphics card of the
>> > machine my program is running on. I have looked into the pyopengl
>> > module, and using them to query the card, but it seems like there
>> > ought to be a simpler way to find this out without setting up a
>> > glcontext. Does anyone have any ideas?
>>
>> You could execute glxinfo and look for the renderer string. If
>> that's sharp enough for your purpose. Another option is lspci.
>
> I should have clarified. I would like a cross platform implementation,
> Windows and *nix. It doesn't seem as if glxinfo is available under
> Windows, at least not without installing X11 under cygwin. If
> necessary, I can write the *nix and Windows queries separately.

Yeah, but ...
- what if there isn't one?
- what if there are several?
- what if there *is* one, but your user is sitting by a remote machine,
  not using the card at all?

Your method will, no matter how you choose, fail sooner or later,
so you'd better plan for that.

What is your reason to do this, by the way?  Remember what Homer
Simpson said: if something appears to be hard, it is simply not worth
doing. And I mean that semi-seriously.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From Shawn at Milochik.com  Tue Aug 14 13:46:48 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Tue, 14 Aug 2007 13:46:48 -0400
Subject: Opinions about this new Python book?
In-Reply-To: <8a6b8e350708141020q495b22der4c362ee3df618d82@mail.gmail.com>
References: <mailman.1957.1187093157.22759.python-list@python.org>
	<1187096231.194685.86030@m37g2000prh.googlegroups.com>
	<20070814154913.D8C3C1E400A@bag.python.org>
	<8a6b8e350708141020q495b22der4c362ee3df618d82@mail.gmail.com>
Message-ID: <2dc0c81b0708141046p5006c2d1l35e50c0baf91069d@mail.gmail.com>

Yes, please post back to the list. I saw this book on Amazon, but
there's no table of contents listed, nor is there one on the
publisher's site.

Thanks,
Shawn




On 8/14/07, James Matthews <nytrokiss at gmail.com> wrote:
> i got to say that the best python book i bought was Core Python Programming
> (2nd)  by Wesly Chun! Aside for all the spelling mistakes and syntax errors
> that there are i feel that the book really explained the language well for
> someone coming from another programming language!
>
>
> On 8/14/07, Dick Moores <rdm at rcblue.com> wrote:
> > At 05:57 AM 8/14/2007, kyosohma at gmail.com wrote:
> > >On Aug 14, 7:05 am, Dick Moores <r... at rcblue.com> wrote:
> > > > I'd appreciate opinions about this new Python book.
> > > >
> > > > Title: Python Power!: The Comprehensive Guide
> > > > Author:  Matt Telles
> > > > Publisher:  Course Technology
> > > > Pub. Date:  Jul 27, 2007
> > > > Edition:  1st edition
> > > > Binding:  Paperback
> > > > Pages:  508
> > > > ISBN:  1598631586
> > > > List Price:  34.99 USD
> > > >
> > > > The book on the publisher's website: < http://tinyurl.com/2dkhzg>
> > > >
> > > > And at BestBookDeal.com:
> > > > <http://www.bestbookdeal.com/book/compare/1598631586>
> > > >
> > > > Thanks,
> > > >
> > > > Dick Moores
> > >
> > >I just got this book over the weekend. I'll start reading/skimming
> > >through it this week and hopefully remember to get back to you.
> >
> > Thanks!
> >
> > >  By the
> > >way, why do you want to know?
> >
> > If the experts like it, I'll buy it.
> >
> > Dick
> >
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
>
> --
> http://www.goldwatches.com/
> http://www.jewelerslounge.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Please read:
http://milocast.com/2007/07/31/this-i-believe/


From aleax at mac.com  Thu Aug 30 22:20:24 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 30 Aug 2007 19:20:24 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
Message-ID: <1i3o9kr.2gmni61g62moaN%aleax@mac.com>

Russ <uymqlp502 at sneakemail.com> wrote:
   ...
> programs." Any idea how much Python is used for flight control systems
> in commercial
> transport aircraft or jet fighters?

Are there differences in reliability requirements between the parts of
such control systems that run on aircraft themselves, and those that run
in airports' control towers?  Because Python *IS* used in the latter
case, cfr <http://www.python.org/about/success/frequentis/> ... if
on-plane control SW requires hard-real-time response, that might be a
more credible reason why Python would be inappropriate (any garbage
collected language is NOT a candidate for hard-real-time SW!) than your
implied aspersions against Python's reliability.

According to
<http://uptime.pingdom.com/site/month_summary/site_name/www.google.com>,
Google's current uptime is around 99.99%, with many months at 100% and a
few at 99.98% -- and that's on *cheap*, not-that-reliable commodity HW,
and in real-world conditions where power can go away, network cables can
accidentally get cut, etc.  I'm Uber Tech Lead for Production Systems at
Google -- i.e., the groups I uber-lead are responsible for some software
which (partly by automating things as much as possible) empowers our
wondrous Site Reliability Engineers and network specialists to achieve
that uptime in face of all the Bad Stuff the world can and does throw at
us.  Guess what programming language I'm a well-known expert of...?


> The important question is this: why do I waste my time with bozos like
> you?

Yeah, good question indeed, and I'm asking myself that -- somebody who
posts to this group in order to attack the reliability of the language
the group is about (and appears to be supremely ignorant about its use
in air-traffic control and for high-reliability mission-critical
applications such as Google's "Production Systems" software) might well
be considered not worth responding to.  OTOH, you _did_ irritate me
enough that I feel happier for venting in response;-)

Oh, FYI -- among the many tasks I undertook in my quarter-century long
career was leading and coordinating pilot projects in Eiffel for one
employer, many years ago.  The result of the pilot was that Eiffel and
its DbC features didn't really let us save any of the extensive testing
we performed for C++-coded components, and the overall reliability of
such extensively tested components was not different in a statistically
significant way whether they were coded in C++ or Eiffel; Eiffel did let
us catch a few bugs marginally earlier (but then, I'm now convinced
that, at that distant time, we used by far too few unit-tests for early
bug catching and relied too much on regression and acceptance tests),
but that definitely was _not_ enough to pay for itself.  DbC and
allegedly rigorous compile-time typechecking (regularly too weak due to
Eiffel's covariant vs countervariant approach, btw...), based on those
empirical results, appear to be way overhyped.

A small decorator library supporting DbC would probably be a nice
addition to Python, but it should first prove itself in the field by
being released and supported as an add-on and gaining wide acceptance:
"arguments" such as yours are definitely NOT going to change that.


Alex


From kyosohma at gmail.com  Thu Aug  2 10:24:45 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 02 Aug 2007 14:24:45 -0000
Subject: backup/restore postgresql database
In-Reply-To: <1186037711.895840.240250@g4g2000hsf.googlegroups.com>
References: <1186037711.895840.240250@g4g2000hsf.googlegroups.com>
Message-ID: <1186064685.670910.160470@x40g2000prg.googlegroups.com>

On Aug 2, 1:55 am, Acm <alextab... at gmail.com> wrote:
> I am working with Python 2.5 and Postgresql 8.2.4.
>
> I would like to know how to perform the backup and restore operations
> on postgresql through a python API (e.g. psycopg2).
>
> Thank you.


I don't know much about postgres, but here's what my google-fu turned
up:

http://www.koders.com/python/fidF98B0B88C167C4B9862D8EF6C0CC9BAAC33718DB.aspx?s=cdef%3Aparser
http://python.projects.postgresql.org/
http://pypgsql.sourceforge.net/
http://www.pygresql.org/

You can probably use the subprocess module to connect to it and use
the pg_dump command as well that is documented here:
http://www.postgresql.org/docs/8.1/static/backup.html

Mike



From jstroud at mbi.ucla.edu  Wed Aug 15 17:36:01 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 15 Aug 2007 14:36:01 -0700
Subject: encrypting files + filestreams?
In-Reply-To: <1187186797.579680.206820@19g2000hsx.googlegroups.com>
References: <1187186797.579680.206820@19g2000hsx.googlegroups.com>
Message-ID: <f9vrk1$5p1$1@zinnia.noc.ucla.edu>

per9000 wrote:
> Also I wonder if this can be solved with filestreams (Are there
> streams in python? The only python file streams I found in the evil
> search engine was stuff in other forums.)

Check the source to: http://passerby.sf.net

In it you will find the jenncrypt module that makes a file-like wrapper 
around streams for encrypting and handles padding, etc. It is designed 
for a block cipher. This is not a trivial task, actually, but all the 
code is in there. It is not intensely well documented. It is somewhat 
well organized but this was my first full size attempt at a python 
application. Please read the notes to the "SecureRandom" module inside 
if you decide to use that module as the "name is misleading" under 
certain circumstances. It is used for the padding, although the 
randomness of the padding in a block cipher is in principle not a 
practical security issue in most cases. Other than the pad generation, 
the encryption algorithm is drop-in and I use the pycrypto 
implementation of AES.

Read at least Schneier if you want to get started with such things as 
there are many caveats to using cryptographic systems.

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From kw at codebykevin.com  Sun Aug 19 08:47:34 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Sun, 19 Aug 2007 08:47:34 -0400
Subject: Hot subject: a good python editor and/or IDE?
In-Reply-To: <mailman.2162.1187525764.22759.python-list@python.org>
References: <mailman.2162.1187525764.22759.python-list@python.org>
Message-ID: <93cf5$46c83bee$4275d90a$26606@FUSE.NET>

S?bastien wrote:
> Hi folks,
> 
> I am currently using Eclipse+PyDev when developping Python projects but 
> I lack a fast, simple editor for tiny bit of scripts. So here is my 
> question: what is, for you, the current best ( but still kind of light! 
> ) Python editor/IDE ? A tiny precision, I am on Ubuntu so I am looking 
> for a linux compatible editor.
> 
> Cheers,
> 
> S?bastien

IDLE

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From grflanagan at yahoo.co.uk  Tue Aug 21 06:49:09 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: Tue, 21 Aug 2007 03:49:09 -0700
Subject: C# and Python
In-Reply-To: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
References: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
Message-ID: <1187693349.890687.203900@50g2000hsm.googlegroups.com>

On Aug 21, 12:01 pm, subeen <tamim.shahr... at gmail.com> wrote:
> Hi,
> I am a newcomer in Python.  I am going to write a small Python
> application that will run in windows xp. This application needs to
> have GUI. Is it possible to make a C# application using visual studio
> 2005 that will call the python scripts? Let me explain more here:
> My program will generate a text file of 100 - 100000 random integers,
> and sort those using various sorting methods. Now I have written
> separate sorting scripts in Python (quick sort, insertion sort etc.).
> But I want to write the GUI and number generation program in C#.net.
> When the user clicks Quick Sort button, the quicksort.py will be
> called and it will sort the numbers.
>

If you just want to capture the stdout of a script then you can use
the System.Process and System.ProcessInfo classes.  An example is
here:

http://gflanagan.net/site/dotnet/vsto/run_python_script_from_word.html

HTH

Gerard





From dickinsm at gmail.com  Thu Aug 30 16:36:20 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: Thu, 30 Aug 2007 20:36:20 -0000
Subject: Biased random?
In-Reply-To: <fb77bq$jtk$1@ss408.t-com.hr>
References: <favd0c$fcu$1@ss408.t-com.hr>
	<mailman.80.1188332647.28954.python-list@python.org>
	<fb77bq$jtk$1@ss408.t-com.hr>
Message-ID: <1188506180.227794.20030@q5g2000prf.googlegroups.com>

On Aug 30, 3:55 pm, Ivan Voras <ivoras at __fer.hr__> wrote:
> I've noticed something interesting in my test: the value 0 appears less
> often than other values (which behave as they should).

That's because the call to abs() usually collapses two values to one
(e.g. -2 and 2 both end up being 2),
but there's only one integer n for which abs(n) == 0.

One possible fix:  do

  x = randint(0, 10) - randint(0, 10)
  x = abs(x) - (x<0)

This collapses -1 and 0 to 0, -2 and 1 to 1, etc.

Mark



From atkedzierski at gmail.com  Fri Aug 17 10:33:16 2007
From: atkedzierski at gmail.com (AndrewTK)
Date: Fri, 17 Aug 2007 14:33:16 -0000
Subject: Getting the result of a process after exec*()
Message-ID: <1187361196.184025.234020@k79g2000hse.googlegroups.com>

Hi,

I am trying to write a Python script that takes a ZIP file from a web
form (using CGI) and uses either of the UN*X unzip, gunzip, tar,
bunzip2 utilities to expand it.

I can use Python to save the script to disk; but processing it is
another matter. If for example I have received a *.tar.gz file, I need
to first pass it through gunzip; then through the tar utility. I also
want to process the resulting directory.

The problem for me is this: once an external process is called via
exec*() the script has effectively fulfilled its task. Is there any
way one can process a file with an external process and continue
further processing in Python; /once the external processing is
completed/?

Many thanks,

Andrew



From tdelaney at avaya.com  Mon Aug  6 23:50:46 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Tue, 7 Aug 2007 11:50:46 +0800
Subject: All leading tabs or all leading spaces - why isn't that enforced?
In-Reply-To: <y8Rti.1088$3x.121@newssvr25.news.prodigy.net>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C0848F8@301081ANEX2.global.avaya.com>

John Nagle wrote:

>    One can argue over tab vs. space indentation, but mixing the two
> is just wrong.  Why not have CPython report an error if a file has
> both leading tabs and leading spaces?  I know that was proposed at
> some point, but I don't think it ever went in. That would catch a
> common error introduced during maintenance.

To warn about mixed tabs and spaces:
python -t <script>

To issue errors for mixed tabs and spaces:
python -tt <script>

Tim Delaney


From kyosohma at gmail.com  Wed Aug 15 11:48:23 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 15 Aug 2007 08:48:23 -0700
Subject: Python, Sharepoint, .NET, NTLM
In-Reply-To: <1187190700.127033.98060@19g2000hsx.googlegroups.com>
References: <1187190700.127033.98060@19g2000hsx.googlegroups.com>
Message-ID: <1187192903.783103.98760@i38g2000prf.googlegroups.com>

On Aug 15, 10:11 am, frikk <frik... at gmail.com> wrote:
> Hey everyone,
>   I need to authenticate with a Sharepoint server. It looks to be
> using 'NTLM' authentication.  I've looked on the newsgroup and it
> looks like there has been talk of using python and NTLM but no
> definite solutions are apparent.
>
>   Can anyone provide me with any kind of help on this issue? URLLIB2
> keeps getting a 401 error when I try any kind of authentication.
>
> I am trying to use python here in my company (for obvious reasons -
> python is awesome!) and this is the first major project that would use
> it.  Unfortunately if I cannot talk to Sharepoint (I am just trying to
> get a list of .xml files and data from a form library) I cannot use
> python.
>
>  The other solution would be: Does anyone know how to get xml files
> from a sharepoint library in python?  The worst case would be using
> another language to compile just the xml file downloader.  This is not
> the optimal solution.
>
> Thank you,
> Blaine

NTLM is mentioned here: http://ntlmaps.sourceforge.net/

Others have pointed to Iron Python for this sort of thing. I would
think that you could use COM.

Here's a link that uses Iron Python: http://blog.glenc.net/2007/08/12/sharepoint-meet-python/

Finally, it looks like someone wrote some kind interface:
http://sourceforge.net/projects/pysharepoint

Hope that helps!

Mike



From ladaan at iptel.org  Mon Aug 27 12:30:20 2007
From: ladaan at iptel.org (Ladislav Andel)
Date: Mon, 27 Aug 2007 18:30:20 +0200
Subject: comparing two lists
In-Reply-To: <fam2no$d9r$00$1@news.t-online.com>
References: <mailman.180.1187886381.32294.python-list@python.org>	<fakgtj$c3d$00$1@news.t-online.com>	<mailman.190.1187892928.32294.python-list@python.org>	<fakvli$4da$01$1@news.t-online.com>	<mailman.233.1187940106.32294.python-list@python.org>
	<fam2no$d9r$00$1@news.t-online.com>
Message-ID: <46D2FC1C.9020905@iptel.org>

I have learnt a lot from your example and used it for my purpose.
Thank you, it very helped me.
Lada

Peter Otten wrote:
> Ladislav Andel wrote:
>
>   
>> need to be stopped before deleting any instance from items.
>> So I need to call stopLoop method in the given item in items before it
>> gets removed.
>> If there is any addition to items it's quite easy to call
>> item.startLoop() method.
>>     
>
> Unless you want to rely on the __del__ method or introduce another
> complication (weak references) you have to be explicit:
>
> # untested
> # removing items
> db_items = set(Item(**d) for d in dblist)
> delenda = items - db_items
> for item in delenda:
>     item.stopLoop()
>     items.remove(item)
>
>   
>> (I use twisted but it should not make any difference):
>>     
>
> I've not worked with twisted, so I can't confirm that.
> I can imagine that they provide their own way to spell a finalizer...
>
> Peter
>   



From erlangga.kusuma at gmail.com  Thu Aug 16 04:37:12 2007
From: erlangga.kusuma at gmail.com (angga_cute)
Date: Thu, 16 Aug 2007 01:37:12 -0700
Subject: about: informtion computer...
Message-ID: <1187253432.794360.145090@g12g2000prg.googlegroups.com>

To All Members :

I have some information for you

I would like you to invite to visiting my web, may be you need some
information about newest information about computer, laptop, and than
printer. I have little bit information on my web http://www.komputer -
djogja.blogspot .com/  and http://www.notebook stor.blogspot. com/

I hope my web can give you alot of information. ..

Thanks for you attention...


regards



From michael at jedimindworks.com  Mon Aug 13 01:59:40 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sun, 12 Aug 2007 22:59:40 -0700
Subject: Colored text
In-Reply-To: <1186970751.435970.189900@q3g2000prf.googlegroups.com>
References: <1186970751.435970.189900@q3g2000prf.googlegroups.com>
Message-ID: <B553D994-9B7A-4D40-8AC0-43407C1E5F84@jedimindworks.com>


On Aug 12, 2007, at 7:05 PM, Rohan wrote:
> Can some one tell me how do I get colored text. Say when I want to
> write something in a text file , how do I get it colored.

You can use ANSI escape codes -- http://en.wikipedia.org/wiki/ 
ANSI_escape_code:

colorCodes = [
     "\033[0mAll attributes off\033[0m",
     "\033[1mBold\033[0m",
     "\033[4mUnderline\033[0m",
     "\033[5mBlink\033[0m",
     "\033[8mHide\033[0m",
     "\033[30mBlack\033[0m",
     "\033[31mRed\033[0m",
     "\033[32mGreen\033[0m",
     "\033[33mYellow\033[0m",
     "\033[34mBlue\033[0m",
     "\033[35mMagenta\033[0m",
     "\033[36mCyan\033[0m",
     "\033[37mWhite\033[0m",
     "\033[40m\033[37mBlack Background\033[0m",
     "\033[41mRed Background\033[0m",
     "\033[42mGreen Background\033[0m",
     "\033[43mYellow Background\033[0m",
     "\033[44mBlue Background\033[0m",
     "\033[45mMagenta Background\033[0m",
     "\033[46mCyan Background\033[0m",
     "\033[47mWhite Background\033[0m"
]

for i in colorCodes:
     print i

hth,
Michael
---
"I would rather use Java than Perl. And I'd rather be eaten by a  
crocodile than use Java." ? Trouser




From grante at visi.com  Mon Aug 27 17:57:54 2007
From: grante at visi.com (Grant Edwards)
Date: Mon, 27 Aug 2007 21:57:54 -0000
Subject: Biased random?
References: <favd0c$fcu$1@ss408.t-com.hr>
	<favgh4$1gm3$1@grapevine.csail.mit.edu>
Message-ID: <13d6i72s8b2a3ad@corp.supernews.com>

On 2007-08-27, Jun-geun Park <junkeun.park at gmail.com> wrote:

>> I have a list of items, and need to choose several elements
>> from it, "almost random". The catch is that the elements from
>> the beginning should have more chance of being selected than
>> those at the end (how much more? I don't care how the
>> "envelope" of probability looks like at this point - can be
>> linear). I see that there are several functions in Python
>> standard libraries for various distribution, but is there an
>> easy pythonic way to make them do what I need?

> That's weird. random.randint(a,b) will be enough for most
> cases. Test your system to see the distribution is uniform
> with something like:

Except he wants a non-uniform distribution.

-- 
Grant Edwards                   grante             Yow! I'm changing the
                                  at               CHANNEL ... But all I get
                               visi.com            is commercials for "RONCO
                                                   MIRACLE BAMBOO STEAMERS"!


From danb_83 at yahoo.com  Thu Aug  9 23:25:19 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: Thu, 09 Aug 2007 20:25:19 -0700
Subject: beginner whitespace question
In-Reply-To: <f9gf03$3al$1@daisy.noc.ucla.edu>
References: <1186703261.136506.208660@x35g2000prf.googlegroups.com>
	<1186703525.591462.122140@m37g2000prh.googlegroups.com>
	<1186704161.334597.218750@z24g2000prh.googlegroups.com>
	<1186707164.095766.243480@q3g2000prf.googlegroups.com>
	<1186708404.901323.204730@g12g2000prg.googlegroups.com>
	<f9gf03$3al$1@daisy.noc.ucla.edu>
Message-ID: <1186716319.025828.93780@g12g2000prg.googlegroups.com>

On Aug 9, 8:28 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> eggie5 wrote:
> > But this still isn't valid:
>
> > from django.db import models
>
> > class Poll(models.Model):
> >    question = models.CharField(max_length=200)
> >    pub_date = models.DateTimeField('date published')
>
> >     def __unicode__(self):
> >            return self.question
>
> > class Choice(models.Model):
> >     poll = models.ForeignKey(Poll)
> >     choice = models.CharField(max_length=200)
> >     votes = models.IntegerField()
>
> >     def __unicode__(self):
> >            return self.choice
>
> You want this:
>
> from django.db import models
>
> class Poll(models.Model):
>         question = models.CharField(max_length=200)
>         pub_date = models.DateTimeField('date published')
>
>         def __unicode__(self):
>                 return self.question
>
> class Choice(models.Model):
>      poll = models.ForeignKey(Poll)
>      choice = models.CharField(max_length=200)
>      votes = models.IntegerField()
>
>      def __unicode__(self):
>         return self.choice
>
> But this mixes tabs and spaces.
>
> Rules:
>
> 1. Don't use tabs!
> 2. If you are clueless enough to violate (1), then don't mix tabs and
> spaces.
> 3. Don't use tabs!
>
> Tabs are for tables, hence the name. "Use spaces for space and use tabs
> for tables" can be a little mnemonic to help you remember the rules. We
> can make a little song together if you can think of some things that
> rhyme with "don't" and "use" and "tabs".

"won't"

"blues", "booze", "bruise", "choose", "cruise", "fuse", "hues",
"Jews", "lose", "muse", "news", "snooze", "views", etc.

"abs", "cabs", "crabs", "dabs", "grabs", "labs", "scabs", "slabs",
"stabs", etc.



From samushack at gmail.com  Thu Aug 23 10:29:58 2007
From: samushack at gmail.com (samushack at gmail.com)
Date: Thu, 23 Aug 2007 07:29:58 -0700
Subject: simple spider in python
In-Reply-To: <1187876014.845912.236690@e9g2000prf.googlegroups.com>
References: <1187876014.845912.236690@e9g2000prf.googlegroups.com>
Message-ID: <1187879398.007797.128510@i13g2000prf.googlegroups.com>

> I'm trying to do a simple spider in python which:
>
> 1) ask google a query
> 2) parse the data

While you could use urllib2.urlopen() as Frederick mentioned, there is
actually a Python module built JUST for getting info from Google
queries! So check out PyGoogle: http://pygoogle.sourceforge.net/

After you install and import it like a normal Python module, you can
do things like:
doGoogleSearch("thing to query") and get results! Very easy to use.

One thing that might throw you at first: You need to get an API key
from Google, and use that when you setup the classes. The link I
pasted above has all the details.

Good luck!

-Sam



From neptundancer at gmail.com  Sun Aug 26 11:56:08 2007
From: neptundancer at gmail.com (neptundancer at gmail.com)
Date: Sun, 26 Aug 2007 15:56:08 -0000
Subject: lisper learning python,
	... could you please comment my first python program?
Message-ID: <1188143768.742884.38520@r29g2000hsg.googlegroups.com>

Hi,
  to extend my skills, I am learning python. I have written small
program which computes math expression like "1+2*sin(y^10)/cos(x*y)"
and similar, so far only + - * / ^ sin con tan sqrt are supported. But
my program is quite inextensible, I have to change the code to add new
functions... Could some fellow experienced pythonista give me some
tips how to make my program shorter, and more extensible?

to use it, try something like compute("1+x+sin(x)", {"x" : 10}), the
second param is environment so variables like x or y are looked for
value here...

below is the code.... thanks for any tips!

----- code here ----


import sys
import string
import math

def normalize(string):
    tmp = "".join([c for c in string if c != " "])
    return "(" + tmp + ")"

def most_nested_expression(string):
    start = index = 0
    end = len(string) - 1
    level = max_level = 0
    most_nested = False
    for c in string:
        if c == "(":
            level += 1
            if level > max_level:
                most_nested = True
                max_level = level
                start = index
        elif c == ")":
            level -= 1
            if most_nested == True:
                most_nested = False
                end = index
        index += 1
    if level != 0:
        raise IOError("mismatched parens")
    if max_level == 0:
        return (0, len(string), string)
    else:
        return (start + 1, end - start - 1, string[start + 1:end])

def is_reduced_expression(string):
    for c in string:
        if c == "^" or c == "*" or c == "/" or c == "+" or c == "-":
            return False
    return True

def find_first(string, operators):
    positions = []
    for op in operators:
        pos = string.find(op)
        if pos != -1:
            positions += [pos]
    if positions == []:
        return None
    else:
        return min(positions)

def find_operator(string):
    for ops in [["^"], ["*", "/"], ["+", "-"]]:
        pos = find_first(string, ops)
        if pos != None:
            if string[pos + 1] == "+" or string[pos + 1] == "-":
                return pos + 1
            else:
                return pos
    return None

def left_operand(string, operator_pos):
    left = None
    operator = string[operator_pos]
    candidates = [pos for pos in [string.rfind(op, 0, operator_pos)
                                  for op in ["(", ")", "^", "*", "/",
"+", "-"]]
                  if pos != -1]
    if candidates != []:
        left = max(candidates)
    if left == None:
        if operator == "^" or operator == "*" or operator == "/":
            raise IOError("invalid expression %s" % string)
        else: # + or -
            return ("0", operator_pos)
    else:
        if left + 1 == operator_pos:
            if operator == "+" or operator == "-":
                return ("0", left)
            else:
                raise IOError("invalid expression %s" % string)
        else:
            return (string[left + 1:operator_pos], left)

def right_operand(string, operator_pos):
    right = None
    candidates = [pos for pos in [string.find(op, operator_pos + 1)
                                  for op in ["(", ")", "^", "*", "/",
"+", "-"]]
                  if pos != -1]
    if candidates == []:
        if operator_pos == len(string) - 1:
            raise IOError("invalid expression %s" % string)
        else:
            return (string[operator_pos + 1:], len(string))
    else:
        right = min(candidates)
        if operator_pos + 1 == right:
            raise IOError("invalid expression %s" % string)
        else:
            return (string[operator_pos + 1:right], right)

def function_name(string, left_paren_pos):
    candidates = [pos for pos in [string.rfind(op, 0, left_paren_pos)
                                  for op in ["(", "^", "*", "/", "+",
"-"]]
                  if pos != -1]
    if candidates == []:
        return (None, None)
    else:
        left = max(candidates)
        name = string[left + 1:left_paren_pos]
        fun_names = ["sin", "cos", "tan", "sqrt"]

        for f in fun_names:
            if f == name:
                return (left + 1, name)
        return (None, None)

def reduce_step(string, index):
    (left, exp_len, exp) = most_nested_expression(string)
    #print "most nested %s" % exp
    if is_reduced_expression(exp):
        (left1, name) = function_name(string, left - 1)
        if left1 != None:
            return ((name, string[left:left + exp_len], None),
                    string[0:left1] + "$%s" % index + string[left +
exp_len + 1:],
                    True)
        else:
            return ((None, None, None), string[0:left - 1] + exp +
string[left + exp_len + 1:], False)
    else:
        operator_pos = find_operator(exp) + left
        (left_op, left_mark) = left_operand(string, operator_pos)
        (right_op, right_mark) = right_operand(string, operator_pos)
        return ((string[operator_pos], left_op, right_op),
                string[0:left_mark + 1] + "$%s" % index +
string[right_mark:],
                True)

def reduce(string):
    chain = []
    index = 0
    while string[0] == "(":
        ((function, left_op, right_op), new_string, is_expr) =
reduce_step(string, index)
        if is_expr:
            chain += [(function, left_op, right_op)]
            index += 1
        string = new_string
    return chain

def add(a, b): return a + b
def sub(a, b): return a - b
def mul(a, b): return a * b
def div(a, b): return a / b

def translate_function(fn_str):
    if fn_str == "+": return add
    elif fn_str == "-": return sub
    elif fn_str == "*": return mul
    elif fn_str == "/": return div
    elif fn_str == "^": return math.pow
    elif fn_str == "sin": return math.sin
    elif fn_str == "cos": return math.cos
    elif fn_str == "tan": return math.tan
    elif fn_str == "sqrt": return math.sqrt
    else: raise IOError("unknown function %s" % fn_str)

def translate_operand(op_str):
    if op_str[0] == "$":
        result_idx = int(op_str[1:])
        return lambda results, env: results[result_idx]
    else:
        try:
            value = float(op_str)
            return lambda results, env: value
        except ValueError:
            return lambda results, env: env[op_str]

def translate(chain):
    res = []
    for (fn_str, left_op_str, right_op_str) in chain:
        fn = translate_function(fn_str)
        left_op = translate_operand(left_op_str)
        if right_op_str != None:
            res += [(fn, [left_op, translate_operand(right_op_str)])]
        else:
            res += [(fn, [left_op])]
    return res

def compute_value(chain, env, results):
    assert len(chain) == len(results)
    index = 0
    for (fn, operand_fns) in chain:
        operands = [op_fn(results, env) for op_fn in operand_fns]
        results[index] = apply(fn, operands)
        index += 1
    return results[index - 1]

def compute(string, env):
    print "input: %s" % string
    string = normalize(string)
    print "normalized: %s" % string
    string_chain = reduce(string)
    print "reduced: %s" % string_chain
    chain = translate(string_chain)
    print "translated: %s" % chain
    return compute_value(chain, env, range(len(chain)))



From martin at v.loewis.de  Wed Aug 15 15:05:23 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 15 Aug 2007 21:05:23 +0200
Subject: Layer 2 socket connection
In-Reply-To: <1187202110.958564.206770@l22g2000prc.googlegroups.com>
References: <1187202110.958564.206770@l22g2000prc.googlegroups.com>
Message-ID: <46c34e74$0$24979$9b622d9e@news.freenet.de>

> I'm looking at trying to write a python script to connect to a layer 2
> bridge (no IP available).
> 
> Looking at the sockets function, it's not clear if I can connect using
> only the mac address - it appears to want either a broadcast address
> or a specific IP address.
> 
> Can anyone give me a clue on opening a layer 2 socket in Python?

If your operating system supports the PF_PACKET protocol family, you
can try to use that. Python only wraps the socket interface of the
operating system, so if the system's socket implementation has no
facility for that, Python cannot expose it to you, either.

Regards,
Martin


From tjreedy at udel.edu  Fri Aug 24 12:40:11 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 24 Aug 2007 12:40:11 -0400
Subject: I know almost all basics
References: <eb79828c0708230815o6e3a123k857e65e3b3030bb@mail.gmail.com>
Message-ID: <fan1lb$bgj$1@sea.gmane.org>


"Lamonte Harris" <pyth0nc0d3r at gmail.com> wrote in message 
news:eb79828c0708230815o6e3a123k857e65e3b3030bb at mail.gmail.com...
| Now I'm moving more into the gaming world.  What libs/modules would you
| recommend?

One of the basics is learning to use search engines.
Try 'Python game programming' with Google, for instance. 





From steve at holdenweb.com  Mon Aug  6 14:26:59 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Aug 2007 14:26:59 -0400
Subject: Something in the function tutorial confused me.
In-Reply-To: <1186420642.112170.78940@w3g2000hsg.googlegroups.com>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
Message-ID: <f97p5i$sqp$1@sea.gmane.org>

Lee Fleming wrote:
> On Aug 6, 6:25 am, Neil Cerutti <horp... at yahoo.com> wrote:
> Because when the function is called,  the line
> 
> 
>>     if y is None: y = []
> 
> 
> is executed, binding a brand new empty list to y. This
> "rebinding" happens every time the function is called, unless you
> provide an argument for y that is not None.
> 
> Thanks for the prompt replies. But I am still confused. This is what
> confuses me....
> The first time you call the function, say with f(23), after the
> function ends,
> y no longer equals None. Therefore, calling f again, this time like
> this f(24),
> should make y equal [23,24], because the 'if y == None' test fails, or
> at least I think it
> fails, because y.append(x) added something that was not equal to None
> during the previous call.
> 
> Please help me!
> 
The thing that doesn't seem to have been stated explicitly is that each 
function call creates a brand-new namespace. This namespace is 
initialized from the function definition, which includes assignment of 
default values to absent keyword arguments. The function definition, 
then, contains a reference to each default argument value.

In the case that tripped you up, however, the default argument you 
provided was a mutable object (a list) that can be changed in place by 
operations like .append(), whereas when you provide a None default any 
further assignment to the argument name binds it to a new value. In the 
first case, changes to the object are naturally reflected in later 
calls, since it is the object referenced in the function definition that 
is being mutated.

It's only really the same difference as

a = [1, 2]
b = a
a.append("three")

which modifies a single list to which both names, a and b, are bound, and

a = 5
b = a
a += 3

which rebinds the name a to a new object, meaning that a and b are no 
longer bound to the same object.

regards
  Steve

-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From mroeloffs at gmail.com  Mon Aug 20 10:58:42 2007
From: mroeloffs at gmail.com (mroeloffs at gmail.com)
Date: Mon, 20 Aug 2007 07:58:42 -0700
Subject: datetime in microseconds
In-Reply-To: <1187619423.715120.293660@o80g2000hse.googlegroups.com>
References: <1187610776.755796.170990@r29g2000hsg.googlegroups.com>
	<1187615746.655162.295570@z24g2000prh.googlegroups.com>
	<1187619423.715120.293660@o80g2000hse.googlegroups.com>
Message-ID: <1187621922.387688.77090@50g2000hsm.googlegroups.com>

On Aug 20, 4:17 pm, mroelo... at gmail.com wrote:
> On Aug 20, 3:15 pm, John Machin <sjmac... at lexicon.net> wrote:
>
>
>
> > On Aug 20, 9:52 pm, mroelo... at gmail.com wrote:
>
> > > Hi I have a time in microseconds, for example 0x8C905CBA7F84AF4. I
> > > want this to a normal view in hh:mm:ss DD:MM:YYYY. I tried with
> > > datetime, but it only takes a max of 1000000 microseconds is there
> > > another solution?
>
> > Your question can be interpreted in two possible ways:
>
> > 1. You have an interval or duration (independent of a calendar point)
> > and you want to express it in years, months, days, hours, etc. This is
> > not possible, due to the variable number of days in a month. The best
> > that you can do is express it as days, hours, etc.
>
> > >>> microsecs = 0x8C905CBA7F84AF4
> > >>> secs = microsecs // 1000000 # or round to nearest if you prefer
> > >>> mins, secs = divmod(secs, 60)
> > >>> hrs, mins = divmod(mins, 60)
> > >>> days, hrs = divmod(hrs, 24)
> > >>> days, hrs, mins, secs
>
> > (7326893L, 11L, 1L, 16L)
>
> > 2. You want to know the (Gregorian) calendar point that is
> > 0x8C905CBA7F84AF4 microseconds after some epoch. In this case you need
> > to specify what the epoch is. Then you can try something like:
>
> > >>> datetime.datetime.fromordinal(1) + datetime.timedelta(microseconds=microsecs
>
> > )
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > OverflowError: date value out of range
>
> > >>> # Whoops!
> > >>> years_approx = days / 365.25
> > >>> years_approx
> > 20059.939767282682
>
> > Hmmm, one of us seems to be missing something ...
>
> Sorry,  sorry, sorry it was the wrong value, it should be
> 0xE0E6FAC3FF3AB2.

The solution I made, with thanks to John. Maybe someone a better one??
    def DecodeDateTime(self,dateTime):
        dateTime = self.Rotate(dateTime)
        microsecs = int(hexlify(dateTime),16)
        microsecs -= 31536000000000           # -1 Year
        microsecs -= 1123200000000            # -13 Days (magic?)
        secs = microsecs // 1000000
        mins, secs = divmod(secs, 60)
        hrs, mins = divmod(mins, 60)
        days, hrs = divmod(hrs, 24)
        timed = datetime.datetime.fromordinal(1) +
datetime.timedelta(days)
        return "%02d-%02d-%02d %02d:%02d:%02d"%(timed.day,
timed.month, timed.year, hrs, mins, secs)



From arnau at ehas.org  Sun Aug  5 09:02:50 2007
From: arnau at ehas.org (Arnau Sanchez)
Date: Sun, 05 Aug 2007 15:02:50 +0200
Subject: What is the "functional" way of doing this?
In-Reply-To: <0ahbb3hpgici70roicu47fpnob21bteh5c@4ax.com>
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
	<0ahbb3hpgici70roicu47fpnob21bteh5c@4ax.com>
Message-ID: <46B5CA7A.7020100@ehas.org>

> On Jul 30, 5:48 pm, beginner <zyzhu2... at gmail.com> wrote:
> 
>> def f(n):
>>      l=[]
>>      while n>0:
>>          l.append(n%26)
>>          n /=26
>>     return l
>>
>> I am wondering what is the 'functional' way to do the same.
>>

  > I see. It is interesting (and not surprisingly) that recursion or
> yield are required. Thanks for everyone's help.

Why not use both recursion and generators?

def f2(n):
     if n > 0:
         n2, x = divmod(n, 26)
         yield x
         for next in f2(n2):
             yield next

Could this be considered functional?

Anyway, I wonder if there is a more elegant way to do the "yield x... yield 
next" part. Any ideas?

arnau



From steve at holdenweb.com  Thu Aug 30 17:12:58 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 30 Aug 2007 17:12:58 -0400
Subject: subclassing Python types
In-Reply-To: <1188503579.357874.275870@l22g2000prc.googlegroups.com>
References: <1188500442.434722.157350@q5g2000prf.googlegroups.com>	<46d717f5$0$30367$9b4e6d93@newsspool4.arcor-online.net>	<1188501865.541186.272290@e9g2000prf.googlegroups.com>	<mailman.165.1188503169.28954.python-list@python.org>
	<1188503579.357874.275870@l22g2000prc.googlegroups.com>
Message-ID: <fb7bsu$vrf$1@sea.gmane.org>

Arnaud Delobelle wrote:
> On Aug 30, 8:44 pm, Robert Kern <robert.k... at gmail.com> wrote:
>> zzbba... at aol.com wrote:
>>> So it's:
>>> class MyString(str):
>>>    def __init__(self,strInput):
>>>       self = strInput
>> That doesn't quite work. Assigning to "self" only reassigns the name inside the
>> function. It does not replace the object.
>>
>> Instead, call the .__init__() method on str.
> 
> That won't do much as strings are immutable objects...
> As pointed out by Steve Holden and me, str.__new__ is the way.

I suspect the OP is analogous to the drunk who was looking for his key 
next to a lamp post. When a helper became exasperated with the lack of 
results he started to question the drunk about where he'd dropped the 
key. "Over there" says the drunk, pointing about twenty yards away. 
"Then why are you looking over here?". Comes the reply:
  "Because you can't see a bloody thing where I dropped it."

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Aug 28 15:32:13 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 28 Aug 2007 21:32:13 +0200
Subject: extending of adding method?
References: <mailman.77.1188327125.28954.python-list@python.org>
Message-ID: <5jjbhtF3sm4m7U1@mid.individual.net>

Gerardo Herzig wrote:

> Hi all. I have a question about design. The general question would
> be: Where is the line beteween extending a class and adding new
> methods to that class?

What do you mean by "extending"? The Java "extends", which is really
inheritance?
 
> And the particular case im involved is:
> 
> I have a class (say USERCLASS) who implements a user interface.
> One of his methods is called `login'. Later on i got the order of
> implementing a `single login', which off course means a single
> user cant login if a session is already started for that user.
> Extending comes to my mind at first (it works good, actually). But
> now im thinikng if there some problem in adding a method to the
> USERCLASS class named single_login(), who will take care of
> applying the rules of single sign on.
> 
> Which one you guys will pick up? USERCLASS().single_login() or
> SINGLELOGINUSERCLASS().login()

Depends. Inheritance is, IMHO, only good if it makes code reusal
and/or maintainability easier. I've once read that inheritance
often only is wise in "is a" relationships, e. g. "car is a
vehicle", which means class "car" should inherit from
class "vehicle".

Regards,


Bj?rn

-- 
BOFH excuse #304:

routing problems on the neural net



From gherzig at fmed.uba.ar  Thu Aug 16 17:29:24 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Thu, 16 Aug 2007 18:29:24 -0300
Subject: advice about `correct' use of decorator
In-Reply-To: <46C4B81A.8000304@shopzeus.com>
References: <46C4B097.4080309@fmed.uba.ar> <46C4B81A.8000304@shopzeus.com>
Message-ID: <46C4C1B4.6050605@fmed.uba.ar>

Gerardo Herzig wrote:

>> Hi all. I guess i have a conceptual question:
>> Im planing using a quite simple decorator to be used as a conditional 
>> for the execution of the function. I mean something like that:
>>
>> @is_logued_in
>> def change_pass():
>>     bla
>>     bla
>>
>> And so on for all the other functions who needs that the user is 
>> still loged in.
>>
>> where obviosly the is_logued_in() function will determine if the dude 
>> is still loged in, and THEN execute change_pass(). If the dude is not 
>> loged in, change_pass() is NOT executed at all. Instead, it will be 
>> redirected to the `login' screen.
>>   
>
> Are you developing a website or a GUI program?
>
>   Laszlo
>
>
It will be used in a web development. It is an important point?
Gerardo


From gtcopeland at gmail.com  Tue Aug 21 09:14:44 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: Tue, 21 Aug 2007 06:14:44 -0700
Subject: IDE for Python
In-Reply-To: <mailman.55.1187690455.32294.python-list@python.org>
References: <mailman.55.1187690455.32294.python-list@python.org>
Message-ID: <1187702084.510834.265480@m37g2000prh.googlegroups.com>

On Aug 21, 5:00 am, Joel Andres Granados <joel.grana... at gmail.com>
wrote:
> Hello list:
>
> I have tried various times to use an IDE for python put have always been
> disapointed.
> I haven't revisited the idea in about a year and was wondering what the
> python people
> use.
> I have also foundhttp://pida.co.uk/mainas a possible solution.  Anyone
> tried it yet?
>
> suggestions.
> Regards
> Joel Andres Granados
>
>  joel.granados.vcf
> 1KDownload


Have you tried SPE?  I don't know how it compares to PyDev but SPE is
pretty slick.  It has several other tools integrated into it,
including a pretty nice debugger.  It's fairly small and loads mucho
faster than Eclipse ever will.  Best of all SPE is written completely
in Python.

http://pythonide.blogspot.com/
http://sourceforge.net/projects/spe

Personally I use XEmacs at the expense of some of the nicer IDE
features.

Greg



From bdesth.quelquechose at free.quelquepart.fr  Thu Aug 30 08:09:42 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 30 Aug 2007 14:09:42 +0200
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188369928.755777.142690@i38g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
Message-ID: <46d75191$0$401$426a74cc@news.free.fr>

Russ a ?crit :
> On Aug 28, 10:58 pm, Michele Simionato <michele.simion... at gmail.com>
> wrote:
> 
> 
>>Why do you think that would ad a strong positive capability?
>>To me at least it seems a big fat lot of over-engineering, not
>>needed in 99% of programs. In the remaining 1%, it would still not
>>be needed since Python provides out of the box very powerful
>>metaprogramming capabilities so that you can implement
>>yourself the checks you need, if you really need them.
> 
> 
> I get the strong impression you don't really understand what
> programming by contract is.

I get the strong impression you don't really understand how 
condescending you are.

> I have not yet personally used it,

You have no working experience with the concept, but you think it should 
make it into Python's core ???


From __peter__ at web.de  Tue Aug 21 02:16:27 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 21 Aug 2007 08:16:27 +0200
Subject: Is there a way to change the default string encoding?
References: <rNOSPAMon-7D5934.18443820082007@news.gha.chartermi.net>
Message-ID: <fadvvr$ogf$00$1@news.t-online.com>

Ron Garret wrote:

> Is there a way to change the default string encoding used by the
> string.encode() method?  

encode() or decode()? Encoding is best handled by the output stream, e. g.
passing codecs.open(...) instead of the builtin open(...).


> My default environment is utf-8 but I need it 
> to be latin-1 to avoid errors like this:
> 
>>>> 'Andr\xe9 Ramel'.decode()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xe9 in position 4:
> ordinal not in range(128)

If your environment were latin-1, you'd get the same error because Python
assumes ascii by default.
 
> I can't change the code to pass an encoding argument to the decode
> method because it's someone else's code.

Does that code accept unicode strings? Try to pass u"Andre\xe9 Ramel"
instead of the byte string.

If all else fails there's

>>> sys.setdefaultencoding("latin1")
>>> "Andre\xe9 Ramel".decode()
u'Andre\xe9 Ramel'

but that's an evil hack, you should rather talk to the maintainer of the
offending code to update it to accept unicode.

Peter


From ladynikon at gmail.com  Thu Aug  2 21:51:53 2007
From: ladynikon at gmail.com (Danyelle Gragsone)
Date: Thu, 2 Aug 2007 21:51:53 -0400
Subject: PYTHON PROGRAMMING HELP PLSSS !!URGENT
In-Reply-To: <1186104440.508568.138960@i38g2000prf.googlegroups.com>
References: <1186104440.508568.138960@i38g2000prf.googlegroups.com>
Message-ID: <59f9c5160708021851n29957298jb8316bf139658b4@mail.gmail.com>

Hi,

Please do not double post.  Especially with more than one email
address.  If someone can help you.  I am sure they will.

Danyelle


From carairconditionersmail at gmail.com  Fri Aug 17 07:33:10 2007
From: carairconditionersmail at gmail.com (carairconditionersmail at gmail.com)
Date: Fri, 17 Aug 2007 04:33:10 -0700
Subject: Tuned cars!!!
Message-ID: <1187350390.011302.15370@57g2000hsv.googlegroups.com>

If you like tuned cars, come here, you will fond many interesting
stuff

http://tuning-styling.blogspot.com/



From zyzhu2000 at gmail.com  Thu Aug 16 15:26:05 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Thu, 16 Aug 2007 19:26:05 -0000
Subject: Help me!!
In-Reply-To: <1187291279.545324.205610@i38g2000prf.googlegroups.com>
References: <1187291279.545324.205610@i38g2000prf.googlegroups.com>
Message-ID: <1187292365.988491.249170@i38g2000prf.googlegroups.com>

> Some one help me so that
> If ab = [a,b,c,d]
> and cd = [a,c]
> my global list file should be [A,b,C,d]


If there is a lot of entries in the list, I would consider using an
indexed data structure such as dict.

>>> ab=['a','b','c','d']
>>> cd=['a','c']
>>> common=[x.upper() for x in ab if x in cd]
>>> ab_minus_cd=[x for x in ab if x not in cd]
>>> cd_minus_ab=[x for x in ab if x not in cd]
>>> requested_list = common+ab_minus_cd+cd_minus_ab



From email at christoph-haas.de  Sun Aug 12 03:17:25 2007
From: email at christoph-haas.de (Christoph Haas)
Date: Sun, 12 Aug 2007 09:17:25 +0200
Subject: Database intensive application
In-Reply-To: <1186895306.237395.189530@z24g2000prh.googlegroups.com>
References: <1186895306.237395.189530@z24g2000prh.googlegroups.com>
Message-ID: <20070812071725.GB22967@torf.workaround.org>

On Sun, Aug 12, 2007 at 05:08:26AM -0000, Rohit wrote:
> I am a novice. I want to know whether Python can be used to develop
> client/server database and web applications like .NET.

http://pylonshq.com/
http://www.djangoproject.com/
http://turbogears.org/

> Which is the best book/source to learn Python?

http://wiki.python.org/moin/PythonBooks

 Christoph



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug 29 03:40:58 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 29 Aug 2007 09:40:58 +0200
Subject: Is it reasonably easy easy to something like this with python?
In-Reply-To: <1188335743.394160.254680@x35g2000prf.googlegroups.com>
References: <1188326947.527698.245770@r23g2000prd.googlegroups.com>
	<mailman.78.1188327771.28954.python-list@python.org>
	<1188335743.394160.254680@x35g2000prf.googlegroups.com>
Message-ID: <46d52306$0$30531$426a74cc@news.free.fr>

walterbyrd a ?crit :
> On Aug 28, 1:31 pm, Gerardo Herzig <gher... at fmed.uba.ar> wrote:
>> walterbyrd wrote:
> 
>> The one who make that table sorteable is AJAX. Not php. The php part is
>> kind of trivial (so it would be `trivial' in python too). It just reads
>> some data and format it in an html table.
> 
> 
> Thank you, that is great to know. What if there were 1000 records, and
> the table was paginated? 
 >
> I suppose, ajax would sort the front end,

s/ajax/javascript/

You don't need ajax to sort a table, it's pure javascript dom 
manipulation (and there are quite a lot of working, correctly written 
and well-tested scripts doing so).

In your above use case (sortable, paginated, inline-editable grid), ajax 
would be used to:
- retrieve XXX records from the back-end (either as an html fragment or 
in json) via a GET request
- submit modifications (via a POST request)

All the rest is either usual javascript or usual (backend) web programming.


From steve at holdenweb.com  Thu Aug 30 15:43:25 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 30 Aug 2007 15:43:25 -0400
Subject: subclassing Python types
In-Reply-To: <1188501446.781039.241630@e9g2000prf.googlegroups.com>
References: <1188500442.434722.157350@q5g2000prf.googlegroups.com>	<1188501226.443493.94720@i13g2000prf.googlegroups.com>
	<1188501446.781039.241630@e9g2000prf.googlegroups.com>
Message-ID: <fb76l1$dbj$1@sea.gmane.org>

zzbbaadd at aol.com wrote:
> On Aug 30, 12:13 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> On Aug 30, 8:00 pm, zzbba... at aol.com wrote:
>>
>>> I have read that you can derive from the base classes such as str,
>>> list, dict.
>>> I guess this would look like:
>>> def MyString(str):
>>> def MyList(list):
>>> def MyDict(dict):
>> You mean
>>
>> class MyString(str):
>> ...
>>
>>> How do you access the data that is contained in the super class?
>> The same way that you access plain strings, lists or dicts: use the
>> methods of the super class.
>>
> 
> I don't know what name I would use to call a method:
> 
> 
> class MyString(str):
>     def __init__(strInput):
>        ????? = strInput
> 
> 
I think your understanding of Python needs to advance a little before 
you start trying to do something like this. It's the __new__() method 
you need to be overriding, not the __init__() method.

 >>> class MyString(str):
...   def __new__(cls, val):
...     return str.__new__(cls, val)
...
 >>> s = MyString("1234")
 >>> s
'1234'
 >>> type(s)
<class '__main__.MyString'>
 >>>

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From msherman77 at yahoo.com  Sun Aug 26 08:35:35 2007
From: msherman77 at yahoo.com (Michael S)
Date: Sun, 26 Aug 2007 08:35:35 -0400 (EDT)
Subject: wxpython on FreeBSD 6.2 broken
Message-ID: <695717.36137.qm@web88302.mail.re4.yahoo.com>

Good day all,

I was wondering if anyone was using the latest
wxpython on FreeBSD 6. I just installed it yesterday
as well as wxGlade. wxGlade doesn't function properly
- it does not display any controls. I then tried some
simple examples from the web and half of them don't
work.

Anyone aware of this?
Michael


From __peter__ at web.de  Sat Aug 25 02:49:05 2007
From: __peter__ at web.de (Peter Otten)
Date: Sat, 25 Aug 2007 08:49:05 +0200
Subject: Online documentation split onto many small pages
References: <13cuhdr58m5one7@corp.supernews.com>
	<13cukd39lgsfgb4@corp.supernews.com>
	<1188000252.290854.289870@q4g2000prc.googlegroups.com>
	<13cv0jpdot6fo20@corp.supernews.com>
	<87absgjftv.fsf_-_@benfinney.id.au>
Message-ID: <faojd2$q9n$02$1@news.t-online.com>

Ben Finney wrote:

> Grant Edwards <grante at visi.com> writes:
> 
>> I don't really understand what the advantage for splitting up
>> documentation into screen-sized chunks is supposed to be -- all the
>> web browsers I've ever seen can scroll.
> 
> The issue is the time to download the page. Most of the world does not
> have fast internet access.
> 
>> One page per module or chapter sure would make it easier to
>> search...
> 
> Fortunately online documentation in multiple HTML pages is indexable
> by the major search engines; most of those can search within one
> domain, or even within one path prefix of a domain.

The new and improved layout uses fewer pages, but indeed feels less snappy.
See for yourself:

http://docs.python.org/dev/distutils/setupscript.html
http://docs.python.org/dist/setup-script.html

Peter
 



From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Tue Aug  7 10:18:05 2007
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J‭. ‬Fromberger)
Date: Tue, 07 Aug 2007 10:18:05 -0400
Subject: Re‭: ‬get wikipedia source failed‭ (‬urrlib2‭)‬
References: <1186476847.728759.166610@o61g2000hsh.googlegroups.com>
Message-ID: <Michael.J.Fromberger-0AED13.10180507082007@localhost>

In article??? <???1186476847.728759.166610 at o61g2000hsh.googlegroups.com???>,???
??? ???shahargs at gmail.com wrote???:???

???> ???Hi???,???
???> ???I'm trying to get wikipedia page source with urllib2???:???
???>     ???usock??? = ???urllib2???.???urlopen???("???http???://???en.wikipedia.org/wiki???/???
???> ???Albert_Einstein???")???
???>     ???data??? = ???usock.read???();???
???>     ???usock.close???();???
???>     ???return data
???> ???I got exception because HTTP 403??? ???error???. ???why???? ???with my browser i can't
???> ???access it without any problem???????
???> ???
???> ???Thanks???,???
???> ???Shahar???.???

It appears that Wikipedia may inspect the contents of the User-Agent??? ???
HTTP header???, ???and that it does not particularly like the string it??? ???
receives from Python's urllib???.  ???I was able to make it work with urllib??? ???
via the following code???:???

import urllib

class CustomURLopener??? (???urllib.FancyURLopener???):???
???  ???version??? = '???Mozilla/5.0???'???

urllib???.???_urlopener??? = ???CustomURLopener???()???

u??? = ???urllib.urlopen???('???http???://???en.wikipedia.org/wiki/Albert_Einstein???')???
data??? = ???u.read???()???

I'm assuming a similar trick could be used with urllib2???, ???though I didn't??? ???
actually try it???.  ???Another thing to watch out for???, ???is that some sites??? ???
will redirect a public URL X to an internal URL Y???, ???and will check that??? ???
access to Y is only permitted if the Referer field indicates coming from??? ???
somewhere internal to the site???.  ???I have seen both of these techniques??? ???
used to foil screen-scraping???.???

Cheers???,???
???-???M

???-- ???
Michael J???. ???Fromberger???             | ???Lecturer???, ???Dept???. ???of Computer Science
http???://???www.dartmouth.edu???/???~sting???/  | ???Dartmouth College???, ???Hanover???, ???NH???, ???USA


From fabioztessitore at libero.it  Fri Aug  3 13:51:45 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 03 Aug 2007 17:51:45 GMT
Subject: Global package variable, is it possible?
References: <1186160415.065108.139160@e9g2000prf.googlegroups.com>
Message-ID: <46b36b31$0$10622$4fafbaef@reader2.news.tin.it>


Heve you tried to do something like:

# module configure.py
value1 = 10
value2 = 20
...


# other module
from configure import *

# now I'm able to use value1 value2 etc.
var = value1 * value2

bye


From rcdailey at gmail.com  Mon Aug 20 17:46:36 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 20 Aug 2007 16:46:36 -0500
Subject: str().join() isn't working
In-Reply-To: <fad17f$252$1@sea.gmane.org>
References: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com>
	<mailman.4.1187633821.32294.python-list@python.org>
	<1187634895.387910.179500@m37g2000prh.googlegroups.com>
	<496954360708201249y1db0aa14qf0de14538fb51b9d@mail.gmail.com>
	<fad17f$252$1@sea.gmane.org>
Message-ID: <496954360708201446s331f9763vc5a629067594a0d9@mail.gmail.com>

Yeah! That's it lol. Sorry, I wasn't looking at the documentation. At least
you got the point!

Thanks again guys.

On 8/20/07, Terry Reedy <tjreedy at udel.edu> wrote:
>
>
> "Robert Dailey" <rcdailey at gmail.com> wrote in message
> news:496954360708201249y1db0aa14qf0de14538fb51b9d at mail.gmail.com...
> | Hi all,
> |
> | Thanks for your response. I figured out the issue. I was using
> | list.append() to append another list, when I should have been using
> | expand(). Sorry for the confusion.
>
> The method is .extend, not .expand ;=)
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From dejanews at email.com  Sat Aug 18 11:02:58 2007
From: dejanews at email.com (samwyse)
Date: Sat, 18 Aug 2007 10:02:58 -0500
Subject: clarification
In-Reply-To: <CSsxi.28081$RX.11328@newssvr11.news.prodigy.net>
References: <aa405c1f0708162332t7b6dbdd6o2cc0f512dc821d7b@mail.gmail.com>
	<mailman.2107.1187350363.22759.python-list@python.org>
	<fa41k8$10n$1@news2.u-psud.fr> <13cb7frnqs8f6d9@corp.supernews.com>
	<CSsxi.28081$RX.11328@newssvr11.news.prodigy.net>
Message-ID: <CTDxi.6299$4w7.2405@newssvr22.news.prodigy.net>

samwyse wrote:
> Scott David Daniels wrote:
> 
>>   lefts = set()
>>   rights = set()
>>   with open('sheet1', 'r') as fh:
>>       for line in fh:
>>           trimmed = line.strip()
>>           if trimmed: # Skip blanks (file end often looks like that)
>>               left, right = line.strip().split('\t')
>>               lefts.add(left)
>>               rights.add(right)
>>   result = lefts & rights
>>
>> -Scott
> 
> 
>   # change to however many columns may later exist
>   cols = [ set() for i in range(0, 2) ]
>   with open('sheet1', 'r') as fh:
>       for line in fh:
>           for col, data in zip(cols, line.strip().split('\t')):
>               col.add(data)
>   result = cols[0] & cols[1]

My laptop started complaining about low power before I was really 
finished with this last night, so I just hit Send and went to bed.  The 
last line really should be:
    result = reduce(operator.and_, cols)

I'll note that using 'zip' transparently deals with handling those cases 
where there are either more or fewer columns of data than expected.

Finally, does anyone familar with P3K know how best to do the reduction 
without using 'reduce'?  Right now, sets don't support the 'add' and 
'multiply' operators, so 'sum' and (the currently ficticious) 'product' 
won't work at all; while 'any' and 'all' don't work as one might hope. 
Are there an 'intersection' and 'union' built-ins anywhere?


From drobinow at gmail.com  Mon Aug 27 15:06:48 2007
From: drobinow at gmail.com (drobinow at gmail.com)
Date: Mon, 27 Aug 2007 12:06:48 -0700
Subject: sorting a list of lists
In-Reply-To: <1188240075.549626.42020@i38g2000prf.googlegroups.com>
References: <1188233798.684136.263640@22g2000hsm.googlegroups.com>
	<1188235267.790442.193830@q5g2000prf.googlegroups.com>
	<46D31827.9060400@web.de>
	<1188240075.549626.42020@i38g2000prf.googlegroups.com>
Message-ID: <1188241608.303456.199070@19g2000hsx.googlegroups.com>

On Aug 27, 2:41 pm, iapain <iap... at gmail.com> wrote:
> ... It is always better to adopt a generic approach.

 The above statement is incorrect.



From ryanlauritsen at gmail.com  Mon Aug 27 13:59:23 2007
From: ryanlauritsen at gmail.com (RyanL)
Date: Mon, 27 Aug 2007 17:59:23 -0000
Subject: convert non-delimited to delimited
Message-ID: <1188237563.889663.228970@o80g2000hse.googlegroups.com>

I'm a newbie!  I have a non-delimited data file that I'd like to
convert to delimited.

Example...
Line in non-delimited file:
0139725635999992000010100534+42050-102800FM-15+1198KAIA

Should be:
0139,725635,99999,2000,01,01,00,53,4,+42050,-102800,FM-15,+1198,KAIA

What is the best way to go about this?  I've looked all over for
examples, help, suggestions, but have not found much.  CSV module
doesn't seem to do exactly what I want.  Maybe I'm just missing
something or not using the correct terminology in my searches.  Any
assistance is greatly appreaciated!  Using Python 2.4



From python at jayloden.com  Thu Aug 23 16:20:17 2007
From: python at jayloden.com (Jay Loden)
Date: Thu, 23 Aug 2007 16:20:17 -0400
Subject: Putting #'s and variables together in 1 variable
In-Reply-To: <eb79828c0708231309g7a7dd38fpb6dad836b8552cb0@mail.gmail.com>
References: <eb79828c0708231309g7a7dd38fpb6dad836b8552cb0@mail.gmail.com>
Message-ID: <46CDEC01.7050807@jayloden.com>

Lamonte Harris wrote:
>   File "Desktop\python\newsystem\init.py", line 51, in random_n
>     random_name = a+b+c+d+e+ 'temp.txt'
> TypeError: unsupported operand type(s) for +: 'int' and 'str'
> 
> import random
> def random_name():
>     a = random.randint(0,9)
>     b = random.randint(0,9)
>     c = random.randint(0,9)
>     d = random.randint(0,9)
>     e = random.randint(0,9)
>     random_name = a+b+c+d+e+ 'temp.txt '
>     return random_name
> print random_name
> 
> How can i make it so that it adds the random numbers and the temp.txt to
> random_name variable w/out causing any error?

1) If you're just trying to create temporary files, you would be much better 
   off using the tempfile module. It's more secure and saves you the hassle 
   of doing it yourself: http://docs.python.org/lib/module-tempfile.html 

2) Since all you're doing is adding a bunch of numeric values to each other
   to build the string, why wouldn't you just create a random number between
   0 -> 99999 and use that?

3) If you really, really, really still want to do this, the best way I can 
   think of would be to use the string format operator: 

import random
def random_name():
    a = random.randint(0,9)
    b = random.randint(0,9)
    c = random.randint(0,9)
    d = random.randint(0,9)
    e = random.randint(0,9)
    random_name = '%s%s%s%s%stemp.txt' % (a,b,c,d,e)
    return random_name

OR, using suggestion 2 above:

import random
def random_name():
    num = random.randint(0,99999)
    random_name = '%stemp.txt' % (num)
    return random_name


-Jay


From bj_666 at gmx.net  Wed Aug  8 12:00:13 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 Aug 2007 16:00:13 GMT
Subject: some import / namespace questions
References: <mailman.1745.1186585520.22759.python-list@python.org>
Message-ID: <5hu7kdF3md0abU4@mid.uni-berlin.de>

On Wed, 08 Aug 2007 17:11:19 +0200, stef mientki wrote:

> Now it's not possible to import in the existing modules the main plugin, 
> like
>    from Main_User import *
> because this will start the infinite loop.

Which means there's code at the module level.  Tell the users to put that
into a function, then you can import the module without executing this
main loop.

And don't do a * import because your users might use names that the
importing module uses already and which would get replaced by the * import.

> Is there a way of getting the list of collected globals from Main_User 
> to the existing modules,
> without the standard import statement shown above ?

No.  In order to get them the module must be imported.  Otherwise the
names and the objects they refer to don't exist.


From johnmasters at oxtedonline.net  Thu Aug  2 13:26:33 2007
From: johnmasters at oxtedonline.net (John K Masters)
Date: Thu, 2 Aug 2007 18:26:33 +0100
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <1186066840.011817.327080@x35g2000prf.googlegroups.com>
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
	<f8quug$m7j$1@sea.gmane.org>
	<496954360708011453h2a68dee4x48dcb15bb25ea717@mail.gmail.com>
	<f8r0du$qhn$1@sea.gmane.org> <f8r147$rvm$1@sea.gmane.org>
	<mailman.1494.1186045510.22759.python-list@python.org>
	<1186066840.011817.327080@x35g2000prf.googlegroups.com>
Message-ID: <20070802172633.GA4023@spookie1.spookiegate>

On 08:00 Thu 02 Aug     , sdeibel at gmail.com wrote:
> On Aug 1, 6:42 pm, John K Masters <johnmast... at oxtedonline.net> wrote:
> > To suggest that, because the autocompletion worked on one method of a
> > module and not on another was because I had not configured the
> > PYTHONPATH properly is at least insulting.
> 
> We certainly didn't intend to be insulting.  This it the most common
> cause of
> auto-completion problems but you are right that it's a mis-diagnosis
> on our
> part if it was just one method.  We respond to sometimes hundreds of
> emails
> a day ,so we do make mistakes.
> 
> It may be solved by using Reanalyze File from the right-click context
> menu
> on the editor but there's no gaurantee.  This is incredibly complex
> code with
> many layers of highly optimized tokenizing, analysis, inference,
> caching,
> and then display in the various tools in Wing so it often takes a bit
> more time
> to find where the bug is.
> 
> By the way, Wing 3.0 beta1 fixes a number of bugs that would lead to
> bad analysis, including missing methods as a result of failure to
> track edits in a file properly.  It also improves reading completion
> info
> out of extension modules and properly handles several forms of
> import where it fell on its face previously.
> 
> Hope that's useful... please let me know if not.
> 
> - Stephan
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list

This is the point at which I eat cartloads of humble pie and crawl
backwards out of the room muttering my apologies. Not only had I sent my
email to Wingware, I had mis-spelled it. The good people at Wingware
kindly emailed me following my post here. 

My only (feeble) excuse is that I have just lost the backspace key in my
vim config and it's causing me loads of problems when I write emails. 

Once again I apologise profusely. I shall certainly purchase wingware
and will not hesitate to recommend it.

Regards, John
-- 
War is God's way of teaching Americans geography
Ambrose Bierce (1842 - 1914)


From rcdailey at gmail.com  Mon Aug 13 20:27:07 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 13 Aug 2007 19:27:07 -0500
Subject: Python script for mobile platforms -- suggested?
In-Reply-To: <496954360708121958m170b6cd2j8419802dcdd35482@mail.gmail.com>
References: <496954360708121958m170b6cd2j8419802dcdd35482@mail.gmail.com>
Message-ID: <496954360708131727o5276d5a5w57baff6cbea4c34c@mail.gmail.com>

*bump*

On 8/12/07, Robert Dailey <rcdailey at gmail.com> wrote:
>
> Hi,
>
> I'm currently developing a game for a cell phone. The game has a GUI
> system that's currently using XML to define the individual menus. Basically
> this means that for every single menu the user goes to, it loads and parses
> an XML file. Would using Python Script instead of XML be a reasonable
> replacement, or would it be even slower? I've read various articles online
> but I'm still curious to hear what everyone has to say here.
>
> Thanks.
>
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From mroeloffs at gmail.com  Mon Aug 20 07:52:56 2007
From: mroeloffs at gmail.com (mroeloffs at gmail.com)
Date: Mon, 20 Aug 2007 04:52:56 -0700
Subject: datetime in microseconds
Message-ID: <1187610776.755796.170990@r29g2000hsg.googlegroups.com>

Hi I have a time in microseconds, for example 0x8C905CBA7F84AF4. I
want this to a normal view in hh:mm:ss DD:MM:YYYY. I tried with
datetime, but it only takes a max of 1000000 microseconds is there
another solution?



From iclark at mail.ewu.edu  Thu Aug  2 16:42:32 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Thu, 02 Aug 2007 13:42:32 -0700
Subject: Berkely Db. How to iterate over large number of keys "quickly"
In-Reply-To: <1186083838.318952.254370@q3g2000prf.googlegroups.com>
References: <1186083838.318952.254370@q3g2000prf.googlegroups.com>
Message-ID: <f8tfjp$b5s$1@sea.gmane.org>

lazy wrote:
> I have a berkely db and Im using the bsddb module to access it. The Db
> is quite huge (anywhere from 2-30GB). I want to iterate over the keys
> serially.
> I tried using something basic like
> 
> for key in db.keys()
> 
> but this takes lot of time. I guess Python is trying to get the list
> of all keys first and probbaly keep it in memory. Is there a way to
> avoid this, since I just want to access keys serially. I mean is there
> a way I can tell Python to not load all keys, but try to access it as
> the loop progresses(like in a linked list). I could find any accessor
> methonds on bsddb to this with my initial search.
> I am guessing BTree might be a good choice here, but since while the
> Dbs were written it was opened using hashopen, Im not able to use
> btopen when I want to iterate over the db.
> 

db.iterkeys()

Looking at the doc for bsddb objects[1] it mentions that "Once 
instantiated, hash, btree and record objects support the same methods as 
dictionaries." Then looking at the dict documentation[2] you'll find the 
dict.iterkeys() method that should do what you're asking.

Ian

[1] http://docs.python.org/lib/bsddb-objects.html
[2] http://docs.python.org/lib/typesmapping.html



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Aug  9 06:13:24 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 09 Aug 2007 12:13:24 +0200
Subject: Help with Dictionaries and Classes requested please.
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <5i07m4F3mg0r8U1@mid.individual.net>

special_dragonfly wrote:

> I've managed to solve the problem, I really was just being a
> dunce. Here's how incase anyone is wondering:
> 
> class MyClass:
>     def __init__(self):
>         name=""
> dict={}
> dict[0]=[]
> dict[0].append(MyClass())
> dict[0][0].name="Hello"
> print dict[0][0].name
> 
> I'm sorry if I've wasted anyones time, although if there's a
> better way of doing the above I'd still be interested to know.

Since we don't know what exactly of the above you require it's very
hard to give you useful tips. Do you need instance lists, grouped
by keys?

Regards,


Bj?rn

-- 
BOFH excuse #152:

My pony-tail hit the on/off switch on the power strip.



From nick at craig-wood.com  Wed Aug 22 17:30:06 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 22 Aug 2007 16:30:06 -0500
Subject: Error with long running web spider
References: <1187805496.980676.271830@l22g2000prc.googlegroups.com>
Message-ID: <slrnfcp88t.sck.nick@irishsea.home.craig-wood.com>

Josh Volz <jdvolz at gmail.com> wrote:
>  I have a spider that is relatively long running (somewhere between
>  12-24 hours).  My problem is that I keep having an issue where the
>  program appears to freeze.  Once this freezing happens the activity of
>  the program drops to zero.  No exception is thrown or caught.  The
>  program simply stops doing anything.  It even stops printing out its
>  activity to stdout.  The program itself appears to run in about 14
>  megs of memory.  Basically, the program looks up pages on a particular
>  website, and then reads the HTML of those pages, parses it (lots of
>  long regular expressions are used), and saves the found information to
>  an object (which is later translated to SQL and the SQL is written to
>  a file).
> 
>  I've actually had this same problem with several long running Python
>  programs.  Any ideas?

If you were running under unix I'd suggest you "strace" the process to
see what it is doing.  There are windwows strace programs (which I've
never tried) too!

You'll probably find it is wedged in TCP socket code.

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


From http  Wed Aug  8 23:06:00 2007
From: http (Paul Rubin)
Date: 08 Aug 2007 20:06:00 -0700
Subject: what's the point of pow()?
References: <1186620182.116846.327350@57g2000hsv.googlegroups.com>
Message-ID: <7xbqdh8l0n.fsf@ruckus.brouhaha.com>

richyjsm at gmail.com writes:
> it's a serious question:  why does the builtin pow function exist?
> for two argument pow we've got **.  there's no add() for + or mul()
> for *....

They are in the operator module and maybe pow could go there too.

Actually there's a math.pow function that works differently from
the builtin function.  Some cleanup might be in order.


From mail at microcorp.co.za  Wed Aug 22 11:01:16 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 22 Aug 2007 17:01:16 +0200
Subject: Dispatching default application for file, cross platform.
References: <01e101c7e48d$e0e9f860$03000080@hendrik><mailman.106.1187774244.32294.python-list@python.org><fah1nc$cqq$02$1@news.t-online.com>
	<CF8AC00A-6639-4931-9423-2016416CECD6@comhem.se>
Message-ID: <00ae01c7e4cd$8e7af580$03000080@hendrik>

"Tommy Nordgren" <tommy.nordgren at comhem.se> wrote:


> 
> On 22 aug 2007, at 12.04, Peter Otten wrote:
> 
> > Tim Golden wrote:
> >
> >> Hendrik van Rooyen wrote:
> >>> How do I do the equivalent of clicking (in SuSe) or double  
> >>> clicking (in
> >>> Windows) on a file?
> >>>
> >>> In effect I want to tell the OS - take this file and feed it to the
> >>> application that is registered for it.
> >
> >> os.startfile
> >
> > Unfortunately this is Windows-only.
> > For KDE you can use
> >
> > $ kfmclient exec yourfile
> >
> > Peter
> > -- 
> > http://mail.python.org/mailman/listinfo/python-list
> On Mac OS X, invoke the command /usr/bin/open -a <Application>  
> file , or /usr/bin/open file

Thanks Tommy - was not thinking of Macs, but nice to know...

- Hendrik




From nayuhz at gmail.com  Fri Aug 24 07:44:37 2007
From: nayuhz at gmail.com (Yan Zhu)
Date: Fri, 24 Aug 2007 19:44:37 +0800
Subject: any problem with py's RC?
Message-ID: <8ae5ea120708240444w425f00eajed578d8c7ce1584f@mail.gmail.com>

hi all,
Here is 3 PYs, we found there is a big memory wasting, specially the program
c.py, we found the memory will increase very soon.
any body knows why? any RC's problem? thanks

-- 
eSX
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class a():
        def __init__(self):
                fp = open("a_file_lager_1M","rb")
                self.ll = fp.read()
                fp.close()
                self.h = b(self.aaa)
        def aaa(self):
                pass

class b:
        def __init__(self,bbb):
                self.a = bbb  #remove the "self.", the memory use will be very low!
		pass

def c():
        k=a()

while True:
        c()


-------------- next part --------------
import haha
import time

def c():
        b=haha.Client(["127.0.0.1"])
while True:
   # time.sleep(1)
    c()


-------------- next part --------------
#!/usr/bin/env python

from threading import local


class Client(local):
    def __init__(self, servers, debug=0):
        self.k = [_Host(s, self.debuglog) for s in servers]

    def debuglog(self, str):
        pass
class _Host:

    def __init__(self, host, debugfunc=None):
        self.debuglog = debugfunc  #a -> b  b->a, make the memory be huge!
	pass



From jernic at blueyonder.co.uk  Tue Aug 14 16:52:10 2007
From: jernic at blueyonder.co.uk (Jeremy C B Nicoll)
Date: Tue, 14 Aug 2007 21:52:10 +0100
Subject: What order does info get returned in by os.listdir()
Message-ID: <gemini.jms7ay00fafcf00k8@jernic.by.invalid>

What order does info get returned in by os.listdir() ?

I'm just starting to write python code, on an Win XP Pro machine.  I've got
various directories which, when I look at them in Win XP, sorted by name, I
see in order, eg:

   ~prefixed file   .txt
   A.txt
   B.txt
   ...
   Z.txt

ie, XP seems to think that files with a "~" as their first character are
sorted ahead of A.

When I use os.listdir() to return that list of leaf values, I do seem to get
them in alphabetical order, A before B before C etc, but the ~-prefixed ones
are returned after the Z-prefixed files rather than before the A-ones.

I was wondering why...

-- 
Jeremy C B Nicoll - my opinions are my own.


From sebzzz at gmail.com  Thu Aug 23 15:20:23 2007
From: sebzzz at gmail.com (sebzzz at gmail.com)
Date: Thu, 23 Aug 2007 12:20:23 -0700
Subject: Using Regular Expresions to change .htm to .php in files
Message-ID: <1187896823.843419.53220@q3g2000prf.googlegroups.com>

Hi,

I have a bunch of files that have changed from standard htm files to
php files but all the links inside the site are now broken because
they point to the .htm files while they are now .php files.

Does anyone have an idea about how to do a simple script that changes
each .htm in a given file to a .php

Thanks a lot in advance



From horpner at yahoo.com  Sat Aug  4 11:46:26 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Sat, 04 Aug 2007 15:46:26 GMT
Subject: the one python book
References: <mailman.1611.1186233912.22759.python-list@python.org>
	<b60ti.37345$G23.30474@newsreading01.news.tds.net>
	<1186240249.433185.291390@r34g2000hsd.googlegroups.com>
Message-ID: <mb1ti.37346$G23.19003@newsreading01.news.tds.net>

On 2007-08-04, Michael Tobis <mtobis at gmail.com> wrote:
> On Aug 4, 9:32 am, Neil Cerutti <horp... at yahoo.com> wrot
>> With Python, you won't find anything like that. Python is too
>> huge.
>
> That's silly. Python is small in the sense that C is small. 

What way of measuring makes that true?

> The Python standard library is probably much bigger than the C
> standard library, but Kernghan and Richie don't cover it.

The complete standard library, plus some Unix-centered stuff is
covered in K&R. Python compares closely to C++ in the scope of
its built-in features.

> K&R is a unique book. I have never seen anything comparable for
> any language.

That's partly because C is so small, though. Also Kernighan is a
good technical writer. I'm not sure of Ritchie's contribution, as
I haven't read any other books he wrote.

> The closest Python equivalent is the official docs:
>
> http://docs.python.org/
>
> I think the core Python bookshelf is:
>
> Learning Python (Lutxz & Ascher) and/or
> Dive Into Python (Pilgrim) for tutorial
>
> Python in a Nutshell (Martelli) AND
> Python Essential Reference (Beazley) for reference
>
> The latter two books are not perfect (both indexes are
> infuriating) but I usually find that I can find what I am
> looking for in one or the other.

That's an excellent list.

> Like most people I eventually plan to read Moby Dick, War and
> Peace, and Lutz's Programming Python. Maybe when I retire.

Don't forget Rarnaby Budge, by Charles Dikkens, the well known
Dutch author.

-- 
Neil Cerutti


From python at lindin.eu  Tue Aug 28 08:55:59 2007
From: python at lindin.eu (Python list)
Date: Tue, 28 Aug 2007 14:55:59 +0200
Subject: Embedding the python interpreter
In-Reply-To: <1188305107.028128.136960@d55g2000hsg.googlegroups.com>
References: <1188305107.028128.136960@d55g2000hsg.googlegroups.com>
Message-ID: <5caec3a20708280555o7fcd6beegc7e5c66f415e27b4@mail.gmail.com>

Hi,
Do you mean something like py2exe?

http://www.py2exe.org/
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From __peter__ at web.de  Wed Aug  8 03:25:20 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 08 Aug 2007 09:25:20 +0200
Subject: How can I programmatically find the name of a method from within
	that method?
References: <1186548312.672360.259100@q3g2000prf.googlegroups.com>
	<mailman.1727.1186549847.22759.python-list@python.org>
	<1186557384.845276.151630@i13g2000prf.googlegroups.com>
Message-ID: <f9br51$e9a$01$1@news.t-online.com>

kj7ny wrote:

> What is @checkPrivs (see example copied below from other post)?  In
> fact... how does the thing work at all? 

> @checkPrivs
> def add(a,b):
>     return a+b

@... is called a decorator and is just a fancy way of writing

def add(a, b):
    return a+b
add = checkPrivs(add)

Peter


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 24 06:18:11 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 24 Aug 2007 12:18:11 +0200
Subject: beginner, idomatic python 2
In-Reply-To: <13ct5rfc3n5ug48@corp.supernews.com>
References: <13csjmeaoqh9le3@corp.supernews.com>
	<46ce8d0c$0$410$426a74cc@news.free.fr>
	<13ct5rfc3n5ug48@corp.supernews.com>
Message-ID: <46ceb027$0$419$426a74cc@news.free.fr>

bambam a ?crit :
>> trying to be "idiomatic"
> 
> ...I hope that if a python programmer looks at my code it
> won't be an excuse to discard it. 

Hopefully not - and nothing forces you into adopting the common 
convention !-) But it's a fact that Python relies heavily on naming 
conventions, and that it greatly helps readability.

> Less of an issue with Python
> than with C/C++, but since I'm just starting...
> 
> def device(DeviceType):
>     if DeviceType=='PSP':
>         return Psp()
>     elif DeviceType=="Power Supply"
>         return Pwr()
> 
> What about the parameter "DeviceType"?

DEVICE_TYPES = {
   'PSP' : Psp,
   'Power Supply' : Pwr,
}

def get_device(device_type):
     cls = DEVICE_TYPES.get(device_type, None)
     if cls is not None:
        return cls()
     # implicitly returns None, which may or not be a GoodThing(tm)



HTH


From http  Sun Aug 26 19:26:07 2007
From: http (Paul Rubin)
Date: 26 Aug 2007 16:26:07 -0700
Subject: SCF (Python Smar Card Framework)
References: <7OnAi.21500$eY.10887@newssvr13.news.prodigy.net>
Message-ID: <7x8x7xsws0.fsf@ruckus.brouhaha.com>

hg <philippe.martin at att.net> writes:
> I am releasing much of my work including SCF (Cross platform Smart
> Card library & Tools) to the GPL license.
> 
> If interested, go to http://www.SnakeCard.com/Source.html

Wow, that is great.  I haven't found any low cost programmable cards
(no large quantity purchases or developer licenses needed) other than
BasicCard which has some annoying limitations.  Do you have any
suggestions?  Thanks!



From ghirai at ghirai.com  Mon Aug 13 15:14:19 2007
From: ghirai at ghirai.com (Ghirai)
Date: Mon, 13 Aug 2007 22:14:19 +0300
Subject: Drawing a graph
In-Reply-To: <46C06B38.2070507@websafe.com>
References: <mailman.1917.1187012829.22759.python-list@python.org>
	<46C06B38.2070507@websafe.com>
Message-ID: <20070813221419.0595f3a4.ghirai@ghirai.com>

I ended up using matplotlib (http://matplotlib.sourceforge.net).

Thanks for the input everyone.

-- 
Regards,
Ghirai.


From kollasb+news at gmail.com  Wed Aug 15 03:33:17 2007
From: kollasb+news at gmail.com (Suresh Babu Kolla)
Date: Wed, 15 Aug 2007 00:33:17 -0700
Subject: module: zipfile.writestr - line endings issue
In-Reply-To: <1187120956.574400.99170@g4g2000hsf.googlegroups.com>
References: <1187107452.905165.45700@l70g2000hse.googlegroups.com>
	<1187110504.154878.317460@19g2000hsx.googlegroups.com>
	<1187112768.095414.223640@w3g2000hsg.googlegroups.com>
	<1187120956.574400.99170@g4g2000hsf.googlegroups.com>
Message-ID: <1%xwi.1232$4w7.433@newssvr22.news.prodigy.net>

Paul Carter wrote:
> On Aug 14, 1:32 pm, towers <damondo... at googlemail.com> wrote:
>> Thanks - your code works for me also.
>>
>> But I still get the issue when I read the file directly and add it to
>> the archive.
>>
>> Say if I:
>>
>> 1. Use the test.csv file created with your code - currently the line
>> endings look good (viewed in notepad on Win XP)
>> 2. Run the following code:
>>
>> # begin code
>> import zipfile
>> import os.path
>>
>> # Now, create the zipfile
>> dfile = open('test.csv', 'r')
>> zip_file = zipfile.ZipFile(r'C:\temp\ice\line endings\test.zip', 'w',
>> zipfile.ZIP_DEFLATED)
>> zip_file.writestr('test.csv',dfile.read())
>> dfile.close()
>> zip_file.close()
>>
>> 3. Then extract the file and the file endings have been corrupted. Now
>> one long line in notepad. (Other programs interpret correctly though.)
>>
>> Maybe the issue lies with this way (i.e. dfile.read()) of writing the
>> file to the archive...possibly.
>>
>> Damon
>>
> 
> Please don't top post.
> 
> The problem is with how you are opening the file. You need to open in
> binary mode if you wish to read your file unaltered. Also, file() is
> preferred over open() these days I think. Use:
> 
> dfile = file('test.csv', 'rb')

 From Python 2.5 library documentation.

<quote>
      When opening a file, it's preferable to use `open()' instead of
      invoking this constructor directly.  `file' is more suited to type
      testing (for example, writing `isinstance(f, file)').
</quote>

Python documentation seem to recommend using open(). I personally prefer
to use open, just because python open has same signature as POSIX open, 
even beginner programmers can understand the intent of the code clearly.

Kolla


From tjreedy at udel.edu  Fri Aug 10 14:41:03 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 10 Aug 2007 14:41:03 -0400
Subject: Stackless Integration
References: <1186650027.043779.276520@i38g2000prf.googlegroups.com><mailman.1798.1186675098.22759.python-list@python.org>
	<1186678307.205621.221100@x40g2000prg.googlegroups.com>
Message-ID: <f9ibfu$ojo$1@sea.gmane.org>


"Justin T." <jmtulloss at gmail.com> wrote in message 
news:1186678307.205621.221100 at x40g2000prg.googlegroups.com...
| > And as far as I know or
| > could find in the PEP index, C. Tismer has never submitted a PEP asking
| > that it be made so.  Doing so would mean a loss of control, so there is 
a
| > downside as well as the obvious upside of distribution.
| That's true. Though, hopefully, the powers that be would allow him to
| maintain it while it's in the stdlib.

A commitment to maintain is a requirement, not something allowed.  By loss 
of control, I meant things like comforming to PSF's C and Python code style 
guide, responding to possible api change requests, and meeting doc and test 
suite requirement.  There is also the policy of no-feature-additions with 
bug-fix releases (x.y.*).  Is the development of stackless essentially 
finished?  and the design 'frozen'?

| Maybe we should file a PEP for| him... :)

You could offer to help him, but only he can offer his code.  Judging from 
discussions of other proposed additions, I expect that the PEP submitter(s) 
would have to substantively deal with questions like
* Do the C stack manipulations interfere with other operations, either core 
or extensions?  What test have you run to show that it does not.?
* Is the functionality portable to Jython and IronPython? (No is a strike 
against acceptance.)  If so, how easily?
* Generators were, in a sense, an alternative to continuation-stackless. 
The 2.5 addition of generator.send(), making communication more easily 
2-way, makes generators more like tasklets.  So why do we really need them? 
How about an alternative implementation built on generators?

If you want some idea of the type of back and forth discussion that may be 
involved, look at the discussion of Eby's generic functions PEP (3124) on 
the Py-3000 list.

Terry Jan Reedy





From spam at gibtsnicht.com  Mon Aug 20 16:58:37 2007
From: spam at gibtsnicht.com (Willi Richert)
Date: Mon, 20 Aug 2007 20:58:37 GMT
Subject: Development for dual core machine
References: <1187515287.226791.186700@j4g2000prf.googlegroups.com>
	<7x3ayfsagr.fsf@ruckus.brouhaha.com>
	<5irrbdF3r2m8aU3@mid.individual.net>
	<1187577950.231283.254950@i38g2000prf.googlegroups.com>
Message-ID: <Jn3BLr.8HK@pinkrose.net.dhis.org>

Andy wrote:

> Thanks guys for the suggestions.
> 
> Andy

It might be that you have to set the CPU affinity for your python process so
that it works at all. I had that problem on a dual core machine with
hyperthread enabled. Using taskset
(http://www.linuxcommand.org/man_pages/taskset1.html) helped solving the
problem:

taskset -c <CPU#> python ...

Best regards,
wr


-- 
pinkrose.dhis.org,


From uymqlp502 at sneakemail.com  Thu Aug 30 16:13:31 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Thu, 30 Aug 2007 13:13:31 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <mailman.159.1188499976.28954.python-list@python.org>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<1188430887.481586.106760@l22g2000prc.googlegroups.com>
	<mailman.159.1188499976.28954.python-list@python.org>
Message-ID: <1188504811.019632.186580@x35g2000prf.googlegroups.com>


> PEP 316 introduces new syntax for a limited use feature. That's pretty
> much a no-starter, in my opinion, and past experience tends to bear
> that out. Furthermore, it predates decorators  and context managers,
> which give all the syntax support you need and let you move the actual
> DBC features into a library. I can't remember if I mentioned this
> before but I believe that Philip Ebys PEAK toolkit has some stuff you
> could use for DBC.

I don't see how you can avoid adding some new syntax, given that
Python does not
currently have syntax for specifying invariants and pre- and post-
conditions. And if I am
not mistaken, the new syntax would appear only in doc strings, not in
the regular Python
code itself. We're not really talking here about changing the core
Python syntax itself,
so I don't see it as a "non-starter." Anyone who chooses not to use
would be completely
unaffected.

As far as I can tell, Terence Way has done a nice job of implementing
design by contract for
Python, but perhaps a better approach is possible. The advantage of
making part of the
core Python distribution is that it would get vetted more thoroughly.



From a.harrowell at gmail.com  Sat Aug 18 06:44:56 2007
From: a.harrowell at gmail.com (TYR)
Date: Sat, 18 Aug 2007 10:44:56 -0000
Subject: Naming dictionaries recursively
In-Reply-To: <1187376847.158312.234560@w3g2000hsg.googlegroups.com>
References: <1187354296.177606.273300@22g2000hsm.googlegroups.com>
	<5ilkebF3oltfoU2@mid.uni-berlin.de>
	<1187361791.979162.46330@22g2000hsm.googlegroups.com>
	<1187376847.158312.234560@w3g2000hsg.googlegroups.com>
Message-ID: <1187433896.851472.246150@r34g2000hsd.googlegroups.com>

That sounds like a solution. I think the core of the question is as
follows; if I was to call the dict() function for each line, thus
creating a dictionary, and then rename it to dict['name'], will there
be a namespace collision on the next loop when dict() is called again?
Obviously the first dictionary will still be there, as it still has a
refcount of 1; but if it gets overwritten, will the object that the
new name refers to be overwritten too?



From rschroev_nospam_ml at fastmail.fm  Wed Aug 15 14:18:00 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Wed, 15 Aug 2007 18:18:00 GMT
Subject: Simple python iteration question
In-Reply-To: <13c6fb3kjrrkp12@corp.supernews.com>
References: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
	<20070814163430.GJ22017@lass.lfod.us>
	<mailman.1974.1187110840.22759.python-list@python.org>
	<c5cbp4-6r4.ln1@lairds.us>
	<mailman.2018.1187196037.22759.python-list@python.org>
	<13c6fb3kjrrkp12@corp.supernews.com>
Message-ID: <srHwi.54417$zo5.1406163@phobos.telenet-ops.be>

Dennis Lee Bieber schreef:
> On Wed, 15 Aug 2007 13:39:57 -0300, "Gabriel Genellina"
> <gagsl-py2 at yahoo.com.ar> declaimed the following in comp.lang.python:
> 
>> "Never underestimate the bandwidth of a station wagon full of tapes  
>> hurtling down the highway"
>> (Andrew S. Tanenbaum, Computer Networks, 1996; maybe the origin is much  
>> older)
> 
> 	Considering how few "proper" "station wagons" were manufactured at
> that time period... Volvo was about it -- all the other makers tended to
> push "mini-vans"... Besides Volvo, I think the only current production
> station wagon is the Dodge Magnum (and that looks more like a
> chopped/channeled surfer hot-rod).

At least in Europe (including the Netherlands where Tanenbaum lives), 
station wagons were still popular then. Minivans have displaced them 
somewhat since then, but by 1996 there were still quite a few station 
wagons on the roads. There still are quite a few of them around; my boss 
just bought a new Saab 9-3 station wagon.

Manufacturers who made (and make) station wagons include VW (e.g. 
http://en.wikipedia.org/wiki/Image:Vw_passat_b3_v_sst.jpg), Mercedes 
(e.g. http://www.mediaweb06.com/diffusion/annonces/033f1ccd.jpg), BMW 
(e.g. http://www.degrifcars.com/images/BMW/Series3/b_Series3_break.jpg), 
Renault (e.g. 
http://www.carfolio.com/images/dbimages/zgas/models/id/9924/megane_break_1.9_rxe_d.jpg), 
Ford (e.g. http://en.wikipedia.org/wiki/Image:Ford-Focus-wagon.jpg), 
Toyota (e.g. 
http://www.outrefranc.com/modeles/toyota/img/corollabreak3.jpg) and many 
others.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From paddy3118 at googlemail.com  Sat Aug  4 14:02:18 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 04 Aug 2007 18:02:18 -0000
Subject: sqlite3 create table col width?
In-Reply-To: <mailman.1620.1186249934.22759.python-list@python.org>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<1186240708.874804.271030@b79g2000hse.googlegroups.com>
	<1186245190.970687.307920@k79g2000hse.googlegroups.com>
	<mailman.1620.1186249934.22759.python-list@python.org>
Message-ID: <1186250538.568603.86450@o61g2000hsh.googlegroups.com>

On Aug 4, 6:51 pm, jim-on-linux <inq1... at inqvista.com> wrote:
> PY help,
>
> Using sqlite3 v3.1.3
>
> When I create a table collumn using;
>
> newcollum VARCHAR(35),
>
> I get a default of 10 spaces.
>
> No matter what I set the size to I get 10 spqces,
> even using varchar(0) defaults to 10 spaces.
>
> I would appreciae the help if someone could tell
> me what I'm missing, I want to varry the column
> sizes.
>
> jim-on-linux

Hi Jim,
You need to create a new thread for this new question so it gets
maximum visibility and so is more likely to be answered.

- Paddy.



From iclark at mail.ewu.edu  Thu Aug  2 18:55:44 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Thu, 02 Aug 2007 15:55:44 -0700
Subject: (no) fast boolean evaluation ?
In-Reply-To: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
Message-ID: <f8tndh$364$1@sea.gmane.org>

Stef Mientki wrote:
> hello,
> 
> I discovered that boolean evaluation in Python is done "fast"
> (as soon as the condition is ok, the rest of the expression is ignored).
> 
> Is this standard behavior or is there a compiler switch to turn it on/off ?
> 
> thanks,
> Stef Mientki

It's called short circuit evaluation and as far as I know it's standard 
in most all languages. This only occurs if a conditional evaluates to 
True and the only other operators that still need to be evaluated are 
'or's or the condition evaluates to False and all the other operators 
are 'and's. The reason is those other operators will never change the 
outcome: True or'd with any number of False's will still be True and 
False and'ed to any number of Trues will still be False.

My question would be why would you *not* want this?

Ian



From kyosohma at gmail.com  Tue Aug 14 11:06:12 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 14 Aug 2007 08:06:12 -0700
Subject: Script to copy database
In-Reply-To: <GeOdnSj725utPFzbnZ2dnUVZ_vOlnZ2d@centurytel.net>
References: <GeOdnSj725utPFzbnZ2dnUVZ_vOlnZ2d@centurytel.net>
Message-ID: <1187103972.117904.58210@m37g2000prh.googlegroups.com>

On Aug 14, 7:30 am, "Tony" <amcc... at hawkeyerec.com> wrote:
> I'm new at this and would like to know how set up a script to copy a
> database from a local computer to a network at a certain time everyday.
> Should be simple enough, but, as of now I am unfamiliar with how to do this.
> Would this be done by writing a script and setting up a  scheduled task to
> run the script?  Can anyone help me with the script?  Just need it to copy
> an Access database from the local C: drive to a network F: drive.
>
> Thanks,
> Tony

You could use Python's shutil module too!

Mike



From tim at timgolden.me.uk  Mon Aug 27 04:45:17 2007
From: tim at timgolden.me.uk (Tim Golden)
Date: Mon, 27 Aug 2007 09:45:17 +0100
Subject: Win32: Detecting when system is locked or sleeping
In-Reply-To: <2F8A7E1ED7BCED4A84FE44EAFEAED096029B4611@ausx3mpc122.aus.amer.dell.com>
References: <2F8A7E1ED7BCED4A84FE44EAFEAED096029B4611@ausx3mpc122.aus.amer.dell.com>
Message-ID: <46D28F1D.2080606@timgolden.me.uk>

Muhammad_Shiraz at Dell.com wrote:

> I saw your post on the net. We are having a similar problem. Did you 
> ever find out how to detect system lock?

I can't seem to see the original post you're referring to
(reading this via the mailing list) but assuming that by
"locked" you mean: Ctrl-Alt-Del locked, then you can try
this technique:

http://timgolden.me.uk/python/win32_how_do_i/see_if_my_workstation_is_locked.html

and assuming that by "sleeping" you mean: in standby mode, then
you might be able to adapt this:

http://timgolden.me.uk/python/wmi_cookbook.html#monitor-multiple-machines-for-power-events

TJG


From ricaraoz at gmail.com  Tue Aug 21 20:43:54 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Tue, 21 Aug 2007 21:43:54 -0300
Subject: IDE for Python
In-Reply-To: <1187698999.545439.322600@k79g2000hse.googlegroups.com>
References: <mailman.55.1187690455.32294.python-list@python.org>
	<1187698999.545439.322600@k79g2000hse.googlegroups.com>
Message-ID: <46CB86CA.5080907@bigfoot.com>

king kikapu wrote:
> On Aug 21, 12:00 pm, Joel Andres Granados <joel.grana... at gmail.com>
> wrote:
>> Hello list:
>>
>> I have tried various times to use an IDE for python put have always been
>> disapointed.
> 
> 
> I have also tried a lot of them (IDEs) in the last year. I was finally
> happy with Eclipse/Pydev but i was always wanted a more "true" IDE for
> Python.
> I think i found it in Eric4 http://www.die-offenbachs.de/eric/index.html
> You can download from here http://www.riverbankcomputing.co.uk/pyqt/download.php
> (binary installer for Windows that contains Eric and PyQt)
> and have a look at it!
> 

Hi again,
	just installed from riverbank. Qt is ok but when I click Eric on the
start menu it does nothing (WinXP). If you have gone through this I'd
appreciate any tip, in other case I'll try figuring out tomorrow (it's
late and am tired today).

Cheers.


From pyth0nc0d3r at gmail.com  Fri Aug 24 09:24:06 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Fri, 24 Aug 2007 08:24:06 -0500
Subject: Tinker question 1
Message-ID: <eb79828c0708240624k24b6af3aifa066d4570ce344d@mail.gmail.com>

What does the pack function do exactly?  Just puts everything together?

Also I've been reading this manual/tutorial and I'm confused on the Frame,
what does it do, I'm pretty confused on that.

http://www.pythonware.com/library/tkinter/introduction/hello-again.htm
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From __peter__ at web.de  Tue Aug 21 03:49:56 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 21 Aug 2007 09:49:56 +0200
Subject: Is there a way to change the default string encoding?
References: <rNOSPAMon-7D5934.18443820082007@news.gha.chartermi.net>
	<fadvvr$ogf$00$1@news.t-online.com>
	<rNOSPAMon-33A664.00424521082007@news.gha.chartermi.net>
Message-ID: <fae5f5$2mg$00$1@news.t-online.com>

Ron Garret wrote:

> In article <fadvvr$ogf$00$1 at news.t-online.com>,
>  Peter Otten <__peter__ at web.de> wrote:
> 
>> If all else fails there's
>> 
>> >>> sys.setdefaultencoding("latin1")
>> >>> "Andre\xe9 Ramel".decode()
>> u'Andre\xe9 Ramel'
>> 
>> but that's an evil hack, you should rather talk to the maintainer of the
>> offending code to update it to accept unicode.
> 
> Yes, but I need to hack around it until I can get it fixed.

Oops, the snippet above omits the actual hack. It should be

>>> import sys
>>> reload(sys)
<module 'sys' (built-in)>
>>> sys.setdefaultencoding("latin1")
>>> "Andre\xe9 Ramel".decode()
u'Andre\xe9 Ramel'

Peter


From mail at microcorp.co.za  Wed Aug 22 11:02:23 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 22 Aug 2007 17:02:23 +0200
Subject: Dispatching default application for file, cross platform.
References: <01e101c7e48d$e0e9f860$03000080@hendrik>	<mailman.106.1187774244.32294.python-list@python.org><fah1nc$cqq$02$1@news.t-online.com>
	<46CC1576.7060309@timgolden.me.uk>
Message-ID: <00b001c7e4cd$8fb0b660$03000080@hendrik>

"Tim Golden" <ma....me.uk>

> Peter Otten wrote:
> > Tim Golden wrote:
> > 
> >> Hendrik van Rooyen wrote:
> >>> How do I do the equivalent of clicking (in SuSe) or double clicking (in
> >>> Windows) on a file?
> >>>
> >>> In effect I want to tell the OS - take this file and feed it to the
> >>> application that is registered for it.
> > 
> >> os.startfile
> > 
> > Unfortunately this is Windows-only. 
> 
> Good point. I think that Paul Boddie's desktop
> module is designed to handle cross-platform issues
> for this kind of thing: (Never used it myself)
> 
> http://pypi.python.org/pypi/desktop/0.2.3
> 
> TJG

It gets better and better - Thanks Peter and Tim.

- Hendrik




From chad at imvu.com  Mon Aug 20 18:00:30 2007
From: chad at imvu.com (Chad Austin)
Date: Mon, 20 Aug 2007 15:00:30 -0700
Subject: GeneratorExit should derive from BaseException, not Exception
Message-ID: <46CA0EFE.6020103@imvu.com>

Hi all,

First, I'd like to describe a system that we've built here at IMVU in 
order to manage the complexity of our network- and UI-heavy application:

Our application is a standard Windows desktop application, with the main 
thread pumping Windows messages as fast as they become available.  On 
top of that, we've added the ability to queue arbitrary Python actions 
in the message pump so that they get executed on the main thread when 
its ready.  You can think of our EventPump as being similar to Twisted's 
reactor.

On top of the EventPump, we have a TaskScheduler which runs "tasks" in 
parallel.  Tasks are generators that behave like coroutines, and it's 
probably easiest to explain how they work with an example (made up on 
the spot, so there may be minor typos):

	def openContentsWindow(contents):
		# Imagine a notepad-like window with the URL's contents...
		# ...

	@threadtask
	def readURL(url):
		return urllib2.urlopen(url).read()

	@task
	def displayURL(url):
		with LoadingDialog():
			# blocks this task from running while contents are being downloaded, 
but does not block
			# main thread because readURL runs in the threadpool.
			contents = yield readURL(url)

		openContentsWindow(contents)

A bit of explanation:

The @task decorator turns a generator-returning function into a 
coroutine that is run by the scheduler.  It can call other tasks via 
"yield" and block on network requests, etc.

All blocking network calls such as urllib2's urlopen and friends and 
xmlrpclib ServerProxy calls go behind the @threadtask decorator.  This 
means those functions will run in the thread pool and allow other ready 
tasks to execute in the meantime.

There are several benefits to this approach:

1) The logic is very readable.  The code doesn't have to go through any 
hoops to be performant or correct.
2) It's also very testable.  All of the threading-specific logic goes 
into the scheduler itself, which means our unit tests don't need to deal 
with any (many?) thread safety issues or races.
3) Exceptions bubble correctly through tasks, and the stack traces are 
what you would expect.
4) Tasks always run on the main thread, which is beneficial when you're 
dealing with external objects with thread-affinity, such as Direct3D and 
Windows.
5) Unlike threads, tasks can be cancelled.

ANYWAY, all advocacy aside, here is one problem we've run into:

Imagine a bit of code like this:

	@task
	def pollForChatInvites(chatGateway, userId, decisionCallback, 
startChatCallback, timeProvider, minimumPollInterval = 5):
		while True:
			now = timeProvider()
	
			try:
				result = yield chatGateway.checkForInvite({'userId': userId})
				logger.info('checkForInvite2 returned %s', result)
			except Exception:
				logger.exception('checkForInvite2 failed')
				result = None
			# ...
			yield Sleep(10)

This is real code that I wrote in the last week.  The key portion is the 
try: except:  Basically, there are many reasons the checkForInvite2 call 
can fail.  Maybe a socket.error (connection timeout), maybe some kind of 
httplib error, maybe an xmlrpclib.ProtocolError...  I actually don't 
care how it fails.  If it fails at all, then sleep for a while and try 
again.  All fine and good.

The problem is that, if the task is cancelled while it's waiting on 
checkForInvite2, GeneratorExit gets caught and handled rather than 
(correctly) bubbling out of the task.  GeneratorExit is similar in 
practice to SystemExit here, so it would make sense for it to be a 
BaseException as well.

So, my proposal is that GeneratorExit derive from BaseException instead 
of Exception.

p.s. Should I have sent this mail to python-dev directly?  Does what I'm 
saying make sense?  Does this kind of thing need a PEP?

-- 
Chad Austin
http://imvu.com/technology


From larry.bates at websafe.com  Mon Aug 27 15:32:35 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 27 Aug 2007 14:32:35 -0500
Subject: Socket - gaierror
In-Reply-To: <1188242671.182072.130150@r23g2000prd.googlegroups.com>
References: <1188242671.182072.130150@r23g2000prd.googlegroups.com>
Message-ID: <OIidnbjzCJVLu07bnZ2dnUVZ_gidnZ2d@comcast.com>

half.italian at gmail.com wrote:
> Hi all,
> 
> I'm having trouble with the socket module resolving a hostname.  It
> seems like this is a system level problem, but I'm not even sure where
> to start.  I can ping the smtp server by name and IP, but when
> smtp.SMTP("theHost") tries to get the hostname, it keeps giving me the
> following error:
> 
>   File "bin/program.py", line 123, in notify
>     smtp = smtplib.SMTP("theHost")
> 
>   File "/usr/lib/python2.4/smtplib.py", line 255, in __init__
>     addr = socket.gethostbyname(socket.gethostname())
> 
> gaierror: (-2, 'Name or service not known')
> 
> I tried changing to a different smtp server, using an ip instead of a
> host name.  I could ping both boxes by name oor IP.
> 
> any ideas?
> 
> ~Sean
> 
The specific error shown is a DNS resolution problem.  Based on the
URL "theHost" smtplib can't resolve to an IP address (which is what
socket.gethostbyname does).  You don't say what happened when you changed to ip, 
but I suspect it is a different error or some other problem.  Maybe a firewall 
issue (port 25 not open?), but I'm just guessing.

-Larry


From greg at cosc.canterbury.ac.nz  Mon Aug 13 22:29:17 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Tue, 14 Aug 2007 14:29:17 +1200
Subject: Car Air Conditioners
In-Reply-To: <kk32c3d5qk1ur2eo1beqe77efsof70smhc@4ax.com>
References: <1186993120.706804.185590@b79g2000hse.googlegroups.com>
	<kk32c3d5qk1ur2eo1beqe77efsof70smhc@4ax.com>
Message-ID: <5icij7F3ockgtU1@mid.individual.net>

Robert Coe wrote:
> It's hard to imagine anything more OT in this newsgroup

It's on topic as long as the air conditioner
can be programmed in Python. With the amount
of electronics being used in cars these days,
that's not entirely beyond the realms of
possibility...

--
Greg


From ldo at geek-central.gen.new_zealand  Thu Aug 30 20:52:57 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 31 Aug 2007 12:52:57 +1200
Subject: Python doesn't see the directories I create
References: <ldvBi.293202$LE1.92748@newsfe13.lga>
	<46d6856b$0$17674$426a74cc@news.free.fr>
	<slrnfddha0.1o4.horpner@FIAD06.norwich.edu>
Message-ID: <fb7okk$h7k$3@lust.ihug.co.nz>

In message <slrnfddha0.1o4.horpner at FIAD06.norwich.edu>, Neil Cerutti wrote:

> Keeping in mind which came first, isn't it at least as accurate
> to attribute this problem to Python's choice of escape character?

No, it's Microsoft's fault. The use of backslash as an escape character goes
back to Unix systems in the early 1970s--long before Microsoft came on the
scene.

When Microsoft introduced MS-DOS 1.0 in 1981, it didn't have directory
hierarchies. Commands used the slash character to delimit options. Then
when MS-DOS 2.0 introduced subdirectories in 1983, they decided they
couldn't use the slash as the path separator, so they used the backslash
instead. That has been a source of confusion ever since then.


From s.mientki at mailbox.kun.nl  Wed Aug  8 11:11:19 2007
From: s.mientki at mailbox.kun.nl (stef mientki)
Date: Wed, 08 Aug 2007 17:11:19 +0200
Subject: some import / namespace questions 
Message-ID: <46B9DD17.1040003@gmail.com>

hello,

I'm working on a rather strange program,
that is partially build dynamically,
and where users can create plugins,
without knowing any of the details of the core program.

Of course this leads to some weird bugs,
so one of the things I want to view/log is the order (and even better 
the way) modules are imported.
For now I've put a print statement in every module.
But is there a more elegant way to see when (how, by which module ) a 
module is imported ?

The main plugin of the user (with a fixed name, let's say 
"Main_User.py") has a an (almost) infinite loop,
which can be aborted by raising an exception.
Now I have to make a few globals from this user module,
available to other existing modules.
I already created a list of these globals.
Now it's not possible to import in the existing modules the main plugin, 
like
   from Main_User import *
because this will start the infinite loop.
Is there a way of getting the list of collected globals from Main_User 
to the existing modules,
without the standard import statement shown above ?

thanks,
Stef Mientki




From seun.osewa at gmail.com  Wed Aug 22 20:58:53 2007
From: seun.osewa at gmail.com (Seun Osewa)
Date: Thu, 23 Aug 2007 00:58:53 -0000
Subject: The Future of Python Threading
In-Reply-To: <1186871128.210582.27300@k79g2000hse.googlegroups.com>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<1i2njyp.1o6yslqe7ff47N%luc@honk-honk.com>
	<1186782710.600889.245930@j4g2000prf.googlegroups.com>
	<1186802188.653072.236260@x40g2000prg.googlegroups.com>
	<1186807396.988368.201400@b79g2000hse.googlegroups.com>
	<1186871128.210582.27300@k79g2000hse.googlegroups.com>
Message-ID: <1187830733.003805.108990@q4g2000prc.googlegroups.com>

Yes, but if you reduce the coupling between threads in Java (by using
the recommended Python approach of communicating with Queues) you get
the full speed of all the cores in your CPU.  i wonder why we can't
have this in Java; it will be very good for servers!

> As for Java, making code thread safe *does* slow down the code. It is
> the very reason that the language designers made the collections API
> non-thread safe by default (you have to wrap the standard collections
> in a synchronised wrapper to make them thread safe).
>
> --
> Ant...




From apardon at forel.vub.ac.be  Thu Aug  9 05:09:26 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 9 Aug 2007 09:09:26 GMT
Subject: pep 3116 behaviour on non-blocking reads
Message-ID: <slrnfblme6.cfj.apardon@rcpc42.vub.ac.be>

In the RawIOBase class I read the following:

.read(n: int) -> bytes

    Read up to n bytes from the object and return them. Fewer than n
    bytes may be returned if the operating system call returns fewer
    than n bytes. If 0 bytes are returned, this indicates end of file.
    If the object is in non-blocking mode and no bytes are available,
    the call returns None.


I would like the developers to reconsider and return 0 bytes when no
bytes are available and let None indicate end of file.

The reason is that this can lead to clearer code that will work
independant of the blocking mode of the stream.

Consider a consumer that just has to treat each byte. Then with
the current choice the code will look something like the following
(assuming pep 315 is implemented)


|    do:
|        buf = stream.read(nr)
|    while buf != "":
|        if buf is not None:
|            for b in buf:
|                treat(b)


If what the method returns follows my proposal, the code to do the same
would look something like the following:


|    do:
|        buf = stream.read(nr)
|    while buf is not None:
|        for b in buff:
|            treat(b)


The advantage with my propsal is that in a lot of cases an empty buffer
can be treated just the same as a non-empty one and that is reflected
in the return values of my proposal.


-- 
Antoon Pardon


From cai.haibin at gmail.com  Wed Aug 22 02:49:32 2007
From: cai.haibin at gmail.com (james_027)
Date: Wed, 22 Aug 2007 06:49:32 -0000
Subject: for statement on empty iterable
In-Reply-To: <7xd4xgnldp.fsf@ruckus.brouhaha.com>
References: <1187760507.951994.50310@q4g2000prc.googlegroups.com>
	<7xabsk3zgm.fsf@ruckus.brouhaha.com>
	<1187761270.713307.224570@i38g2000prf.googlegroups.com>
	<7xejhw15r9.fsf@ruckus.brouhaha.com>
	<1187761957.636211.107060@x40g2000prg.googlegroups.com>
	<7xd4xgnldp.fsf@ruckus.brouhaha.com>
Message-ID: <1187765372.361411.249990@z24g2000prh.googlegroups.com>

hi,

> Oh I see.  You have to combine a couple of concepts but for this
> example you'd say:
>
>    name = 'james'     # 'l' looks too much like the digit 1
>    for i,c in enumerate(name):
>       print i, c
>    print i
>
> enumerate(name) generates the sequence
>
>    (0,'j'), (1,'a'), (2,'m'), (3,'e'), (4,'s')
>
> and the above loop splits those tuples into two indexes i and c.
>
> You should probably read the tutorial and work through the examples.
> If you get something wrong with this basic stuff, your computer won't
> explode or anything like that, so try stuff out.  Be more careful when
> you start using library routines that can delete files ;).

Thanks, it just that I am afraid of coding that something works but
ugly or inefficient.

cheers,
james



From horpner at yahoo.com  Thu Aug  9 08:42:26 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 09 Aug 2007 12:42:26 GMT
Subject: Help with Dictionaries and Classes requested please.
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
	<46baf183$0$433$426a74cc@news.free.fr>
	<46baf384$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bb00d4$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <slrnfbm34n.n0.horpner@FIAD06.norwich.edu>

On 2007-08-09, special_dragonfly <Dominic at PLEASEASK.co.uk> wrote:
> Is there anyway for python to consider the values within a
> string when entering the data into a dictionary. I know that
> isn't very clear so here's an example:
>
> class MyClass(object):
>     def __init__(self,name="",age=""):
>         self.name=name
>         self.age=age
>
> data="Gary,50"
> d={0:[MyClass(data)]}
> data="Adam,25"
> d[0].append(MyClass(data))
>
> The data is coming from a text file working on a line by line
> basis. I've just tried and I'm just getting the full string in
> the first field. That seems logical, now I don't want it to
> though!

That's what happens if you use 0 for the key every time. ;)

If you're trying to map between ages and lists of names, then
you'll want a little helper function to manage the lists for you.

multidict_add(mdict, key, value):
  if key in mdict:
    mdict[key].append(value)
  else:
    mdict[key] = [value]

d = {}
multidict_add(d, 50, "Gary")
multidict_add(d, 50, "Guido")
multidict_add(d, 25, "Adam")

Now you'll get a list of names for every age.

>>> d[50]
["Gary", "Guido"]

You can use the same function to build a mapping from names to
lists of ages.

d = {}
multidict_add(d, "Gary", 50)
multidict_add(d, "Gary", 23)
multidict_add(d, "Adam", 25)

>>> d["Gary"]
[50, 23]

-- 
Neil Cerutti
The choir invites any member of the congregation who enjoys sinning to join
the choir. --Church Bulletin Blooper


From dickinsm at gmail.com  Fri Aug 24 21:30:14 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: Sat, 25 Aug 2007 01:30:14 -0000
Subject: Does shuffle() produce uniform result ?
In-Reply-To: <878x81rt3d.fsf@mulj.homelinux.net>
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<878x81rt3d.fsf@mulj.homelinux.net>
Message-ID: <1188005414.717674.320500@x40g2000prg.googlegroups.com>

On Aug 24, 8:54 am, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> tooru honda <tooru_ho... at fast-mail.org> writes:
> > I have read the source code of the built-in random module,
> > random.py.  After also reading Wiki article on Knuth Shuffle
> > algorithm, I wonder if the shuffle method implemented in random.py
> > produces results with modulo bias.
>
> It doesn't have modulo bias because it doesn't use modulo to produce a
> random index; it multiplies the floating point value with the desired
> range.  I'm not sure if that method produces any measurable bias.

It produces exactly the same level of bias as the 'modulo bias'
obtained by reducing a random integer in [0, 2**53). For example,
suppose we're trying to produce an integer x in the range 0 through 6
inclusive.  If n is a random variable whose values are uniformly
distributed across range(0, 2**53) then:

x = n % 7

will produce 0, 1, 2 and 3 with probability (2**53//7+1)/2**53, and 4,
5 and 6 with probability (2**53//7)/2**53, while

x = floor((n/2**53)*7)

will produce 0, 1, 3 and 5 with probability (2**53//7+1)/2**53, and 2,
4 and 6 with probability (2**53//7)/2*53.

Either way, you'd have a very hard time detecting such a tiny bias.
At the other end of the scale, if you're trying to produce a value in
[0, 2**53-2] (for example) then it looks worse:  with either method,
one of the values occurs exactly twice as often as all of the others.
But since there are now so many values, you'd again have problems
detecting any bias.

Steven Holden wrote:
> Frankly I don't think you need to worry.

What he said.

Mark



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  9 09:57:33 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 09 Aug 2007 15:57:33 +0200
Subject: Help with Dictionaries and Classes requested please.
In-Reply-To: <46baf384$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
	<46baf183$0$433$426a74cc@news.free.fr>
	<46baf384$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <46bb1d46$0$403$426a74cc@news.free.fr>

special_dragonfly a ?crit :
> "Bruno Desthuilliers" <bruno.42.desthuilliers at wtf.websiteburo.oops.com> 
> wrote in message news:46baf183$0$433$426a74cc at news.free.fr...
>> special_dragonfly a ?crit :
>> (snip)
(and resnip)

> Hello
> To answer first Bjoern:
> I have a dictionary and a class. The dictionary needs to be filled with 
> multiple instances of the class, with multiple instances per key. Currently 
> a lot of the dictionaries that are going into the program are hard coded 
> because they're just 1:1 mappings, in this case though it was a many:1 
> mapping and so I got a little stumped. I couldn't hard coded the mappings, 
> so I then needed to find a way of doing it dynamically. I'm now reading data 
> from a file containing the data for the class, and am now able to put that 
> data into a dictionary.
> 
> I'm quite new to programming large things, and previous experience has only 
> been in C and C++, so I'm also trying to get an idea of good programming 
> practises.

FWIW, and while there of course are quite a few common rules (consistent 
and meaningfull naming, modularization with high cohesion and low 
coupling, "don't repeat yourself" etc), "good programming practises" 
greatly vary from language to language. In fact, one of the common rules 
is probably : "be idiomatic" - that is, don't try to write Pascal in 
Lisp (or C in Python...).

> Other people are going to need to use this program, I need it to 
> be... correct... should someone need to alter it. So loads of documentation, 
> and meaningful variable names, but it's also experience that I'm lacking.

Indeed.

> Is 
> there a better way of doing such-and-such, or is it sensible to do it this 
> way....?

I second Steven's suggestion to spend some time going thru introductory 
material. IMHO, the official Python tutorial (to get the basics - no pun 
intended) and then DiveIntoPython (to see the language in action) should 
do.

Then you'll find that most people here will be very happy to help you 
rewrite your code in the most pythonic way if you kindly ask for help...

> Thank you for your help, all of you.

Welcome to c.l.py.


From ladaan at iptel.org  Thu Aug 23 17:50:51 2007
From: ladaan at iptel.org (Ladislav Andel)
Date: Thu, 23 Aug 2007 23:50:51 +0200
Subject: comparing two lists
In-Reply-To: <46CDCF0D.9090605@iptel.org>
References: <mailman.180.1187886381.32294.python-list@python.org>	<fakgtj$c3d$00$1@news.t-online.com>
	<46CDCF0D.9090605@iptel.org>
Message-ID: <46CE013B.2090708@iptel.org>

Well, I know it's quite ugly what I did to the code, but any 
improvements are welcome.
Actually, it doesn't work as it should yet.
The items should stay the same as at the beginning.
I say in one sentence what I want to achieve:
Synchronized items with dblist.
It should remove hosts from items which are not dblist
or it should add a new host from dblist which is not in items.
I'm sorry I'm not very skilled programmer.

What O notations(algorithm complexity) I introduced to it?
I know made it much slower this way.


dblist = [{'id':1, 'host':'google.com','ip_address':'1.2.3.4'},
      {'id':3, 'host':'msn.com','ip_address':'11.3.2.3'},
      {'id':9, 'host':'yahoo.com','ip_address':'5.6.7.8'}]


class Item(object):
    def __init__(self, id, host, **discarded):
        self._tuple = (id, host)
    def __hash__(self):
        return hash(self._tuple)
    def __eq__(self, other):
        return self._tuple == other._tuple
    def __repr__(self):
        return "Item(id=%r, host=%r)" % self._tuple
   
def syncMemAndDBlist_1():
    for d in dblist:
        item = Item(**d)
        if item not in items:
            print "adding", item
            items.add(item)
        else:       
            print item, "already there"

def syncMemAndDBlist_2(a):
    while a > 0:
        for i in items:
            if i not in dblistitems:
                items.remove(i)
                break
        a -= 1
    if len(items) == 0:
        syncMemAndDBlist_1()
   
items = set([Item(1, "google.com"), Item(3, "yahoo.com"), Item(9, 
"msn.com")])

dblistitems = set()  
for d in dblist:
    dblistitems.add(Item(**d))

a = len(items)
b = len(dblistitems)

if a < b:
    syncMemAndDBlist_1()
else:
    syncMemAndDBlist_2(a)
   
print 'final items are' ,items



From sjmachin at lexicon.net  Fri Aug 24 17:12:38 2007
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 24 Aug 2007 14:12:38 -0700
Subject: csv module
In-Reply-To: <1187965745.959855.95530@q3g2000prf.googlegroups.com>
References: <1187965745.959855.95530@q3g2000prf.googlegroups.com>
Message-ID: <1187989958.688238.63380@q4g2000prc.googlegroups.com>

On Aug 25, 12:29 am, luca72 <lucabe... at libero.it> wrote:
> Hello at all i have a problem with the csv module, really i don't
> undestud the writerows:
>
> if i have to write only one row i do as follow:
> def scrivo_csv(self):
>         import csv
>         q_righe = self.tableWidget.rowCount()
>         for row in range(q_righe) :
>             e_vuota = self.tableWidget.item(row, 5)
>             if e_vuota == None :
>                 ultima = row
>                 break
>         writerdocs = open("some.csv", "wb")
>         scritt = csv.writer(writerdocs, delimiter='|')
>         q_colonne = self.tableWidget.columnCount()
>         ss = 0
>         while ss < row :
>             riga = []
>             for val in range(q_colonne):
>                 esiste = self.tableWidget.item(ss, val)
>                 if esiste == None :
>                     luca = ''
>                 else :
>                     luca = str(QtGui.QTableWidgetItem.text(esiste))
>                 riga.append(luca)
>             scritt.writerow(riga)
>             ss+=1
> This work only with one row in the tablewidget, but if i have more
> than one row how i have to proceed?
>

The above code seems to be OK for "row" >= 2. What happens when there
are two or more rows?

Some style comments: "row" is a confusing name; I'd call it "nrows" or
something like that. "val" would be better as "column_index" or
"colx", "ss" as "row_index" or "rowx". Your while loop is better
expressed as a for loop.




From Shawn at Milochik.com  Wed Aug 15 16:08:41 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Wed, 15 Aug 2007 16:08:41 -0400
Subject: "Variable variable name" or "variable lvalue"
In-Reply-To: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
References: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
Message-ID: <2dc0c81b0708151308y766ce5d5l1c18d10ee5fead55@mail.gmail.com>

On 8/15/07, mfglinux <mfglinux at gmail.com> wrote:
> Hello to everybody
>
> I would like to know how to declare in python a "variable name" that
> it is in turn a variable
> In bash shell I would wrote sthg like:
>
> for x in `seq 1 3`
> do
>   M$i=Material(x)  #Material is a python class
> done
>
> Why I need this? Cause I have a python module that obliges me to build
> a variable called Period, which should have a variable name of
> summands (depends on the value of x)
>
> #Let's say x=3, then Period definition is
> Period=Slab(Material1(12.5)+Material2(25)+Material3(12.5)) #Slab is a
> python class
>
> I dont know how to automatize last piece of code for any x
>
> thank you
>
> Marcos
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


You could use a dictionary -- just build the dictionary keys using
your loop and assign values.


From attn.steven.kuo at gmail.com  Wed Aug 15 20:31:07 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Wed, 15 Aug 2007 17:31:07 -0700
Subject: Coroutines and argument tupling
In-Reply-To: <87k5rwo24e.fsf@seneca.iss.local>
References: <mailman.2032.1187207899.22759.python-list@python.org>
	<5ih63mF3pvnt7U1@mid.individual.net>
	<87k5rwo24e.fsf@seneca.iss.local>
Message-ID: <1187224267.067743.52150@i13g2000prf.googlegroups.com>

On Aug 15, 3:37 pm, "Marshall T. Vandegrift" <llas... at gmail.com>
wrote:
> Bjoern Schliessmann <usenet-mail-0306.20.chr0n... at spamgourmet.com> writes:
> >> I'm trying to write a decorator which allows one to produce simple
> >> coroutines by just writing a function as a generator expression
> >> which re-receives it's arguments as a tuple from each yield.
>
> > May I ask why? Passing it the same arguments over and over is no
> > use; and there is the send method.
>
> That's what I meant.  The wrapper produced by the decorator passes the
> arguments back into the generator as a tuple via the `send' method.
>
> >> The ugliness of the ArgPacker class makes me suspect that I should
> >> perhaps just manually create and track a generator when I need a
> >> function with generator-like properties.
>
> > What do you mean? I don't quite understand why you'd have to "track"
> > a generator for getting generator-like properties.
>
> Using the trivial `nextn' example from my original post with my
> decorator lets you do just:
>
>     print nextn(2)    # => [0, 1]
>     print nextn(3)    # => [2, 3, 4]
>     print nextn()     # => [5]
>
> Without the decorator that becomes:
>
>     gen = nextn(2)
>     print gen.next()  # => [0, 1]
>     print gen.send(3) # => [2, 3, 4]
>     print gen.send(1) # => [5]
>
> The former is just that smidgen nicer, and allows you to continue to
> make use of argument defaults and varadic arguments if so desired.
>


Do you really need a generator or co-routine to do this?  Maybe
you can just use a closure:

import itertools
class Foo(object):
    it = itertools.count(0)

    def __call__(self):
        return self.y

    def __init__(self, n=1):
        self.y = [ Foo.it.next() for each in xrange(n) ]

def nextn(n=1):
    return Foo(n)()

print nextn()
print nextn(3)
print nextn(n=2)
print nextn()

--
Hope this helps,
Steven







From laurent.pointal at limsi.fr  Wed Aug 22 09:33:42 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 22 Aug 2007 15:33:42 +0200
Subject: redirect or cover .bat log
In-Reply-To: <1187787876.962883.66970@r34g2000hsd.googlegroups.com>
References: <1187764689.836375.212730@z24g2000prh.googlegroups.com>
	<5j26bvF3s7lbpU2@mid.uni-berlin.de>
	<1187767578.925671.107000@q4g2000prc.googlegroups.com>
	<5j2br6F3r2avsU1@mid.uni-berlin.de>
	<1187787876.962883.66970@r34g2000hsd.googlegroups.com>
Message-ID: <fahdvm$pno$1@news2.u-psud.fr>

vedrandekovic at v-programs.com a ?crit :
> Can I execute one .bat file (without opening .bat window) just execute
> commands
> and log process redirect with sys.stdout or something in my wx window?
> 
> Is this clear enough?

Type "help cmd" in a Windows console, then grab ad-oc options (/C and /A 
or /U seem good candidates).


To completly hide the console... I dont know. But i have a set of .bat 
scripts for a large application integration, they are started via 
"start" (see help start) and with the /min option to have console 
minimized in the task bar. Minimized, not completly invisible.

[for the remaining, its just subprocess module usage - see examples in 
doc - and reading from output]

A+

Laurent.




From paddy3118 at googlemail.com  Mon Aug 13 11:51:47 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Mon, 13 Aug 2007 08:51:47 -0700
Subject: Dictionary viewer and editor
In-Reply-To: <mailman.1921.1187018384.22759.python-list@python.org>
References: <mailman.1921.1187018384.22759.python-list@python.org>
Message-ID: <1187020307.945732.52450@22g2000hsm.googlegroups.com>

On Aug 13, 7:09 pm, Ariel Balter <abal... at indiana.edu> wrote:
> http://mail.python.org/pipermail/python-list/2001-August/100288.html
>
> Did you ever finish writing this?
>
> --
> <>0<>0<>0<>0<>0<>0<>0<>0<>0<>0
>
> Ariel Balter
>
> Swain Hall West 025
> Department of Physics
> Indiana University, Bloomington
> 737 E Third Street, 47404
>
> abal... at indiana.edu
>
> Office: (812) 855-2441
> Home: (812) 332-2721

There is this (untried): http://home.gna.org/oomadness/en/editobj/index.html



From claird at lairds.us  Wed Aug 15 14:22:43 2007
From: claird at lairds.us (Cameron Laird)
Date: Wed, 15 Aug 2007 18:22:43 +0000
Subject: Simple python iteration question
References: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
	<20070814163430.GJ22017@lass.lfod.us>
	<mailman.1974.1187110840.22759.python-list@python.org>
	<1187193716.041459.232490@e9g2000prf.googlegroups.com>
Message-ID: <jssbp4-54t.ln1@lairds.us>

In article <1187193716.041459.232490 at e9g2000prf.googlegroups.com>,
BartlebyScrivener  <bscrivener42 at gmail.com> wrote:
>On Aug 14, 11:59 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
>
>> Just for my own sanity: Isn't this the third response advocating the
>> use of enumerate()? Did the other responses not get through, or was
>> this a time-delay thing?
>>
>> Thanks,
>> Shawn
>
>Look at the timestamps.  All within ten minutes. And those ten minutes
>are spent keyboarding your response in and posting, plus it takes
>several minutes for the posts to appear on Google Groups.
>
>rd
>
>

... and now we've had two people reply with more-or-less the same
message to this question about the propriety of race conditions in
replies.  Go ahead, explain *that* level of abstracted confusion
to your civilian acquaintances in The Real World.


From michele.simionato at gmail.com  Wed Aug 29 03:48:27 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 29 Aug 2007 07:48:27 -0000
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188369928.755777.142690@i38g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
Message-ID: <1188373707.922509.205070@g4g2000hsf.googlegroups.com>

On Aug 29, 8:45 am, Russ <uymqlp... at sneakemail.com> wrote:
> I get the strong impression you don't really understand what
> programming by contract is.
>
> I have not yet personally used it, but I am interested in anything
> that can help to make my programs more reliable. If you are
> programming something that doesn't really need to be correct, than you
> probably don't need it. But if you really need (or want) your software
> to be correct and reliable as possible, I think you you should be
> interested in it. You might want to read this:
>
> http://archive.eiffel.com/doc/manuals/technology/contract/ariane/page...

That paper contains only a good think: a link to the contrarian view
http://home.flash.net/~kennieg/ariane.html#s3.1.5



From python at jayloden.com  Sat Aug  4 18:17:35 2007
From: python at jayloden.com (Jay Loden)
Date: Sat, 04 Aug 2007 18:17:35 -0400
Subject: Submit web form only client-side with Python? COM?
In-Reply-To: <7xmyx7ot0c.fsf@ruckus.brouhaha.com>
References: <1186257525.483524.5570@j4g2000prf.googlegroups.com>
	<7xmyx7ot0c.fsf@ruckus.brouhaha.com>
Message-ID: <46B4FAFF.205@jayloden.com>

Paul Rubin wrote:
> goldtech <goldtech at worldpost.com> writes:
>> So I can present the user with an HTML form in it - but how can I
>> write the form data to a local file on my work station?
> 
> The simplest way is with the cgi and CGIHTTPServer modules.  You'd
> write your form in an html file, with the target set to a Python
> script that you'd write as a cgi.  Then you'd write a trivial CGI HTTP
> server (look at the example code in the comments) with CGIHTTPServer.
> The user would point their browser at your server (you could make a
> desktop shortcut for that), the browser shows the html file, and the
> submit button sends the form contents to your cgi.
> 
> This is very basic, old-school web programming, not as flexible or
> high-performance as using the fancy frameworks, but a lot simpler for
> limited applications like what you're describing.

CGIHTTPServer is not available on Windows (OP said they are on Win XP) due to
use of fork and exec to execute the CGI. I suggested a few other options in my
reply, but unfortunately CGIHTTPServer is not an option for this task.

-Jay


From steven.bethard at gmail.com  Sun Aug 12 22:24:53 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 12 Aug 2007 20:24:53 -0600
Subject: A dumb question about a class
In-Reply-To: <1186966648.867722.185770@19g2000hsx.googlegroups.com>
References: <mailman.1887.1186955369.22759.python-list@python.org>
	<TqSdnWYzVdWvGCLbnZ2dnUVZ_saknZ2d@comcast.com>
	<1186965321.741540.108820@k79g2000hse.googlegroups.com>
	<1186966648.867722.185770@19g2000hsx.googlegroups.com>
Message-ID: <L-6dndzTXf9qXSLbnZ2dnUVZ_tfinZ2d@comcast.com>

Dustan wrote:
> On Aug 12, 7:35 pm, Dustan <DustanGro... at gmail.com> wrote:
>> On Aug 12, 5:09 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
>>
>>>      def iter_primes():
>>>          # an iterator of all numbers between 2 and +infinity
>>>          numbers = itertools.count(2)
>>>          # generate primes forever
>>>          while True:
>>>              # get the first number from the iterator (always a prime)
>>>              prime = numbers.next()
>>>              yield prime
>>>              # remove all numbers from the (infinite) iterator that are
>>>              # divisible by the prime we just generated
>>>              numbers = itertools.ifilter(prime.__rmod__, numbers)
>> This is kind of OT (from the thread), but in this iter_primes
>> function, numbers is becoming an ifilter of an ifilter of an ifilter
>> of an ifilter of an ifilter of an ifilter of... Is that really at all
>> efficient for larger numbers (millions or billions, or even bigger)?
> 
> To word my question better:
> 
> How does this algorithm compare and contrast to maintaining a
> dictionary or set and iterating through those structures to find out
> if a number is divisible? All of those algorithms I've described are
> O(n^2), if I'm not mistaken, but as far as memory-efficiency and the
> likes, how do they compare/contrast?

I don't have the answer off hand, but if anyone wants to report some 
timeit results or memory consumption here, I'd be interested.

STeVe


From dvmorris at gmail.com  Tue Aug 14 11:12:50 2007
From: dvmorris at gmail.com (David Morris)
Date: Tue, 14 Aug 2007 10:12:50 -0500
Subject: Callback functions with httplib.HTTPSConnection
Message-ID: <8773af8f0708140812w51b9634cj4b0b336f23256820@mail.gmail.com>

Is there a way to give a progress or status message while a file it
uploading using httplib.HTTPSConnection? Here is some sample code that I
would like to add a progress message to when run from the commandline:

server = httplib.HTTPSConnection(upload_host)
 server.request('POST', upload_uri, body, headers)
 resp = server.getresponse()
 server.close()

 if resp.status == 201:
   location = resp.getheader('Location', None)
 else:
   location = None
 return resp.status, resp.reason, location

It looks like ftplib has support for callback functions for things like
listing the contents of a directory, but I don't see callback support
anywhere in httplib. Would it only be possible to show an estimated duration
based on file size, or would the better answer be to break the file up into
chunks? I'm pretty new to Python, so I'm not quite sure how to handle
something like this...

Thanks for the help,

Dave
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From vijay.kumar.75in at gmail.com  Mon Aug 20 02:41:54 2007
From: vijay.kumar.75in at gmail.com (vijay.kumar.75in at gmail.com)
Date: 19 Aug 2007 23:41:54 -0700
Subject: best GUI library for vector drawing program
In-Reply-To: <1187359935.718745.206790@i38g2000prf.googlegroups.com>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
	<1187359935.718745.206790@i38g2000prf.googlegroups.com>
Message-ID: <1187361760.396397.251030@e9g2000prf.googlegroups.com>

Hi All,

Today I have downloaded a SWT Software which is great to its features.
You can learn
many GUI details out of it. The basic functionality is it lists IP
Addresses of the
remote PC's your system is accessing.

You may find the project under sourceforge.net

http://sourceforge.net/projects/nettymaster

You can customize this software, please let me know your views



From Shawn at Milochik.com  Tue Aug 14 12:40:15 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Tue, 14 Aug 2007 12:40:15 -0400
Subject: Simple python iteration question
In-Reply-To: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
References: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
Message-ID: <2dc0c81b0708140940k48d6b79dq3f0ce9f183772b78@mail.gmail.com>

On 8/14/07, Bryan <b at bcc.com> wrote:
> Hi,
>
> I just started with python, and have a for loop question
>
> In c++ (or a number of other languages) I can do this:
>
> for (int i=0, j=0; i < i_len, j< j_len; ++i, ++j) {}
>
> If I have this in python:
> l = ['a', 'b', 'c']
>
> I want to get the value and also an iterator:
> for i,v in len(l), l:
>         print v
>         print i
>
> Or something like this without declaring the iterator outside my loop...
>
> How do I do this?
> Thanks!
> --
> http://mail.python.org/mailman/listinfo/python-list
>


If I understand properly, maybe enumerate will help you:



>>> a = ['a','b','c']
>>> for i,v in enumerate(a):
...     print i
...     print v
...
0
a
1
b
2
c
>>>


From sturlamolden at yahoo.no  Thu Aug  2 16:30:09 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: Thu, 02 Aug 2007 13:30:09 -0700
Subject: python 3.0, pywin32 and scipy
In-Reply-To: <1186070475.659511.24130@q3g2000prf.googlegroups.com>
References: <1186070475.659511.24130@q3g2000prf.googlegroups.com>
Message-ID: <1186086609.231563.224090@x35g2000prf.googlegroups.com>

On Aug 2, 6:01 pm, vml <victor.leb... at gmail.com> wrote:

> - my script using pywin32 for the COM layer and scipy for the maths
> won't work under 3.0

Why not?


> - will we have the equivalent of pywin32 and scipy in python ?

Say what? I've always thought pywin32 and scipy were Python packages.



From aahz at pythoncraft.com  Fri Aug 24 09:14:19 2007
From: aahz at pythoncraft.com (Aahz)
Date: 24 Aug 2007 06:14:19 -0700
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com>
	<87tzqp77my.fsf@wilson.homeunix.com>
Message-ID: <famljb$1d9$1@panix3.panix.com>

In article <87tzqp77my.fsf at wilson.homeunix.com>,
Torsten Bronger  <bronger at physik.rwth-aachen.de> wrote:
>Aahz writes:
>>
>> My point is that docutils already exists; given the combined
>> competition from LaTeX and docutils and OpenOffice, you should
>> probably explain what differentiates your project and why people
>> should support your project instead of (or in addition to) others.
>
>reStructuredText, AsciiDoc, and some others focus on source code
>documentation, or on software documentation.  In contrast to that,
>our markup should be suitable for PhD theses, papers and the like.
>Thus, it has weaker means for code snippets, RFC citation etc, but
>rich syntax for bibliographic entries, index entries, math, and
>floating figures.  

Enh.  reST is intended to be a general-purpose system.  It's certainly
extensible, and I've added code for index entries myself.  There has
been some recent activity on improving bibliographic support, and I
believe some people are working on integrating MathML.

>Additionally, input methods simplify using characters like ??, ???, or
>???.

"Everyone" says to just use a Unicode editor.  Long-term, I think that's
what's going to happen -- you're starting your project too late for this
to make much sense.

>The differences to LaTeX are explained comprehensively on the
>webpage, and actually LaTeX is the real competitor rather than
>reStructuredText.  OOo isn't a plain text format, and has no strong
>semantic markup.

Then you're really caught between a rock and a hard place.  LaTeX is
extremely well-entrenched; at the same time reST is gaining features.
You would probably make much better progress on your goals by simply
working on the reST project -- I doubt you can improve on reST as a
markup language, and the more you try to cram in, the more you're going
to look like LaTeX, anyway.

OTOH, this is Open Source, and nobody's going to stop you.  ;-)  I just
think you're also not going to get much traction.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From rNOSPAMon at flownet.com  Mon Aug 20 21:44:39 2007
From: rNOSPAMon at flownet.com (Ron Garret)
Date: Mon, 20 Aug 2007 18:44:39 -0700
Subject: Is there a way to change the default string encoding?
Message-ID: <rNOSPAMon-7D5934.18443820082007@news.gha.chartermi.net>

Is there a way to change the default string encoding used by the 
string.encode() method?  My default environment is utf-8 but I need it 
to be latin-1 to avoid errors like this:

>>> 'Andr\xe9 Ramel'.decode()         
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe9 in position 4: 
ordinal not in range(128)

I can't change the code to pass an encoding argument to the decode 
method because it's someone else's code.

Thanks,
rg


From johnmasters at oxtedonline.net  Mon Aug 20 15:06:55 2007
From: johnmasters at oxtedonline.net (John K Masters)
Date: Mon, 20 Aug 2007 20:06:55 +0100
Subject: Python equivalent of Perl's $/
In-Reply-To: <slrnfcjcqq.557.nick@irishsea.home.craig-wood.com>
References: <mailman.9.1187619031.26576.python-list@python.org>
	<slrnfcjcqq.557.nick@irishsea.home.craig-wood.com>
Message-ID: <20070820190655.GA4424@spookie1.spookiegate>

On 10:30 Mon 20 Aug     , Nick Craig-Wood wrote:
> Something like this maybe?
> 
> import re
> 
> input_data = """I am currently working my way through Jeffrey Friedl's book Mastering
> Regular Expressions. Great book apart from the fact it uses Perl for the
> examples.
> 
> One particular expression that interests me is '$/ = ".\\n"' which,
> rather than splitting a file into lines, splits on a period-newline
> boundary. Combined with Perl's 'while (<>)' construct this seems a great
> way to process the files I am interested in.
> 
> Without wishing to start a flame war, is there a way to do this in Python?
> """
> 
> for para in re.split(r"\.\n", input_data):
>     print "para = %r" % para
> 

Thanks, that looks promising. The Perl examples are really confusing
sometimes and throw me off the track of the obvious Python way. That
said, the Python documentation does not always make it clear, at least
not to me, how to get the result one wants.

Regards, John
-- 
War is God's way of teaching Americans geography
Ambrose Bierce (1842 - 1914)


From Herman.Schultz at gmail.com  Fri Aug 31 19:40:46 2007
From: Herman.Schultz at gmail.com (herman)
Date: Fri, 31 Aug 2007 23:40:46 -0000
Subject: How can I wait for all the threads I spawn for 5 minutes
Message-ID: <1188603646.671414.272760@w3g2000hsg.googlegroups.com>

Hi,

In my python program, I would to like to spwan 5 threads, for the them
for 5 minutes maximum and the continue. Here is my script:

            threads = []

            for j in range(5):
                t = MyThread()
                threads.append(t)

            for t in threads:
                t.join(60*5)
                print "thread join\n"

            # wait for 5 minutes for all the threads to complete ,
and
            # then continue

But this code ends up waiting 5 minutes for **each** thread.  that is
not what I want. I just want to wait for 5 minutes for all threads.
how can I do that?

And after 5 minutes, i want to kill off all the threads I spawn
earlier, how can I do that in python.

Thank you for any help.



From jzgoda at o2.usun.pl  Tue Aug  7 15:53:16 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Tue, 07 Aug 2007 21:53:16 +0200
Subject: Heterogeneous lists
In-Reply-To: <46b8cbdf$0$6956$426a74cc@news.free.fr>
References: <RPadnXFHmYYUIiXbnZ2dnUVZ_uKpnZ2d@comcast.com>
	<46b8cbdf$0$6956$426a74cc@news.free.fr>
Message-ID: <f9aiso$b99$1@nemesis.news.tpi.pl>

Bruno Desthuilliers napisa?(a):

> Gordon Airporte a ?crit :
>> This is one of those nice, permissive Python features but I was
>> wondering how often people actually use lists holding several
>> different types of objects.
> 
> Depends on the definition of 'type'. I often have instances of different
> - possibly unrelated - classes in a same list. Fact is that these
> instances usually share a common (implied) interface, but, well,
> sometimes they don't...

I love my lists of classes. I know, I'll go to hell for that.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From __peter__ at web.de  Tue Aug 14 02:44:10 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 14 Aug 2007 08:44:10 +0200
Subject: how to  move cursor in Interactive Interpreter
References: <1187072484.626674.157200@x40g2000prg.googlegroups.com>
Message-ID: <f9rivq$sfc$00$1@news.t-online.com>

 yan.python at gmail.com wrote:

> i  have a question.
> when i run Interactive Interpreter in linux command promt,how can i
> move the cursor.
> for example,when i enter a string,i often enter the quotation mark ""
> first,and the move the cursor inside the mark to enter the string,in
> windows,it is ok.but when i do that in linux,pressing the "left" key
> will just print "^[[D" in the screen ,but not what i want.
> so , how can i move the cursor Interactive Interpreter in linux?
>  i've googled and find nothing useful.who i tell me what to do?

Python uses GNU readline for cursor movements. The Python version that ships
with your distribution should work out of the box. If you compile Python
yourself make sure that the development package (not just the binary) is
installed. For Suse this is readline-devel.

Peter


From rschroev_nospam_ml at fastmail.fm  Fri Aug  3 10:56:07 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Fri, 03 Aug 2007 14:56:07 GMT
Subject: (no) fast boolean evaluation ? missing NOT
In-Reply-To: <1186152677.730158.111420@w3g2000hsg.googlegroups.com>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<mailman.1545.1186095368.22759.python-list@python.org>
	<1186096979.397596.36640@e16g2000pri.googlegroups.com>
	<eb4fb$46b2f7a6$d443bb3a$21643@news.speedlinq.nl>
	<1186152677.730158.111420@w3g2000hsg.googlegroups.com>
Message-ID: <bmHsi.32231$EM7.1243196@phobos.telenet-ops.be>

Paul Boddie schreef:
> On 3 Aug, 11:45, Stef Mientki <S.Mientki-nos... at mailbox.kun.nl> wrote:
>> Sorry, my question missed the essential "NOT",
>> here is an example, that behaves different in Delphi,
>> (so I guess Delphi is not a real language ;-)
> 
> Delphi is based on Pascal, and from what I can recall from my
> university textbook, there isn't any mandatory short-circuit
> evaluation in Pascal: it's an implementation-dependent feature.
> Consequently, an expression involving boolean operators in such
> languages may well evaluate each term (potentially causing side-
> effects) before determining the final result.

I even thought Pascal never uses short-circuit evaluation, and always 
evaluates all terms. I might be wrong about that though; it's been quite 
a long time since I've used Pascal.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 31 04:28:31 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 31 Aug 2007 10:28:31 +0200
Subject: list index()
In-Reply-To: <1188517370.998114.119940@q4g2000prc.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<87bqcod2gq.fsf@benfinney.id.au>
	<1188517370.998114.119940@q4g2000prc.googlegroups.com>
Message-ID: <46d7d11f$0$3985$426a74cc@news.free.fr>

zzbbaadd at aol.com a ?crit :
(snip)
> I don't think that is the definition used across computer science.
> 
> It suddenly dawned on me that what would be best would be a contains()
> (or IN syntax for those who can't afford to wait) for lists.

No need to wait:

 >>> 'a' in ['a', 'b']
True
 >>> ['a', 'b'].__contains__('a')
True




From steve at holdenweb.com  Fri Aug 31 12:24:35 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 12:24:35 -0400
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188537516.622167.115080@z24g2000prh.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>	<1188364909.397692.209170@q4g2000prc.googlegroups.com>	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>	<1188369928.755777.142690@i38g2000prf.googlegroups.com>	<46d75191$0$401$426a74cc@news.free.fr>	<1188518054.298017.90610@x35g2000prf.googlegroups.com>	<46d76595$0$4013$426a74cc@news.free.fr>	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>	<1188525647.003223.199620@q5g2000prf.googlegroups.com>	<mailman.181.1188527203.28954.python-list@python.org>
	<1188537516.622167.115080@z24g2000prh.googlegroups.com>
Message-ID: <fb9fc6$1n0$1@sea.gmane.org>

Russ wrote:
>> I've always wondered... Are the compilers (or interpreters), which take
>> these programs to machine code, also formally proven correct?
> 
> No, they are not formally proven correct (too complicated for that),
> but I believe they are certified to a higher level than your "typical"
> compiler. I think that Ada compilers used for certain safety-critical
> applications must meet higher standards than, say, GNU Ada, for
> example.
> 
> And the OS
>> in which those programs operate, are they also formally proven correct?
> 
> Same as above, if I am not mistaken.
> 
>> And the hardware, microprocessor, electric supply, etc. are they also
>> 'proven correct'?
> 
> I think the microprocessors used for flight control, for example, are
> certified to a higher level than standard microprocessors.
> 
> How would you prove a power supply to be "correct"? I'm sure they meet
> higher reliability standards too.
> 
>
"... I believe ...", "... if I am not mistaken", "I think ...".

Well, all this certainty you are expressing will surely allow this bozo 
to sleep more soundly in his bed.

Frankly I am getting a little tired of they way you are unable to even 
recognize that your readers may well have a sensible appreciation of the 
difficulties about which you write. As has been pointed out already, 
many readers here are extremely experienced programmers.

You said in an earlier post "that's not an insult", but that isn't 
really up to you to decide. If it gives offense then it probably is, 
whether it was intended to do so or not. You don't seem to appreciate 
the insulting nature of your tone, and calling people bozos is not 
likely to endear you to most c.l.py readers since it comes off as arrogant.

Given that you now profess no absolute certainty on fairly simple 
matters connected to safety-critical systems I wish you'd step down off 
your platform and join the rest of us.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From tn.pablo at gmail.com  Sun Aug 19 17:51:13 2007
From: tn.pablo at gmail.com (Pablo Torres)
Date: Sun, 19 Aug 2007 21:51:13 -0000
Subject: Syntax Question - list multiplication
Message-ID: <1187560273.146491.90530@r29g2000hsg.googlegroups.com>

Hi guys!

I am working on Conway's Game of Life right now and I've run into a
little problem.
I represent dead cells with 0s and live ones with 1s. Check this out:

	>>> grid = [[0] * 3] * 3
	>>> grid
	[[0, 0, 0], [0, 0, 0], [0, 0, 0]]
	>>> grid[0][0] = 1
	[[1, 0, 0], [1, 0, 0], [1, 0, 0]]

Now, that's not what I want. I just want the first element of the
first sublist to be a 1, not the first of every one. Here's what I
tried and didn't work:

0.  grid = [[0] * 3][:] * 3    then the same grid[0][0] = 1 statement
1.  grid = [[0][:] * 3] * 3    followed by the same assignment
2.  (grid[0])[0] = 1    with the original initialization of the grid

So, that means that it isn't a problem with two different variables
refering to the same list (0. and 1. prove that). What I don't
understand is why 2. doesn't work either. I'm baby-feeding my
instructions to Python and the mistake is still there. Any ideas?

Hope you can help. Thanks in advance,

Pablo



From __peter__ at web.de  Sun Aug 12 06:04:47 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 12 Aug 2007 12:04:47 +0200
Subject: Fatest standard way to sum bytes (and their squares)?
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
	<f9mlne$k0k$02$2@news.t-online.com>
Message-ID: <f9mlvv$k0k$02$3@news.t-online.com>

Peter Otten wrote:

> Erik Max Francis wrote:
> 
>> For a file hashing system (finding similar files, rather than identical
>> ones), I need to be able to efficiently and quickly sum the ordinals of
>> the bytes of a file and their squares.  Because of the nature of the
>> application, it's a requirement that I do it in Python, or only with
>> standard library modules (if such facilities exist) that might assist.
>> 
>> So far the fastest way I've found is using the `sum` builtin and
>> generators::
>> 
>> ordinalSum = sum(ord(x) for x in data)
>> ordinalSumSquared = sum(ord(x)**2 for x in data)
>> 
>> This is about twice as fast as an explicit loop, but since it's going to
>> be processing massive amounts of data, the faster the better.  Are there
>> any tricks I'm not thinking of, or perhaps helper functions in other
>> modules that I'm not thinking of?
> 
> Two ideas:
> 
> Use a lookup-table for ord(c)**2
> Use array.array()
> 
> $ cat summit.py
> import array
> 
> data = "dere gewizzede bizzede bizz" * 1000 + chr(255)
> 
> lookup  = dict((i, i**2) for i in range(256))

Oops, make that a list:

lookup  = [i**2 for i in range(256)]

> def summit_str(data=data):
>     return sum(ord(x) for x in data), sum(ord(x)**2 for x in data)
> 
> def summit_array(data=data, lookup=lookup):
>     a = array.array("B")
>     a.fromstring(data)
>     return sum(a), sum(lookup[x] for x in a)
> 
> if __name__ == "__main__":
>     assert summit_array() == summit_str()
> 
> $ python -m timeit -s'from summit import summit_str as summit' 'summit()'
> 10 loops, best of 3: 32.2 msec per loop
> $ python -m timeit -s'from summit import summit_array as summit'
> 'summit()' 100 loops, best of 3: 13.4 msec per loop

$ python -m timeit -s'from summit import summit_array as summit' 'summit()'
100 loops, best of 3: 12.9 msec per loop

Not a big gain, but still...

> Your actual code may be even faster because you can read the bytes
> directly from the file.
 
> Peter



From borreguero at gmail.com  Thu Aug 23 14:44:03 2007
From: borreguero at gmail.com (Jose Borreguero)
Date: Thu, 23 Aug 2007 14:44:03 -0400
Subject: how to select between two file libraries with same name?
Message-ID: <7cced4ed0708231144v468947c3o4fb51a4822d0fc52@mail.gmail.com>

Imagine my file one.py contains the statement
import two
If there's a two.py in same directory as one.py, then this file will be
loaded. However, I want to load a different file named also two.py, say file
~username/mypythonlib/two.py
How can I select between the two two.py files ?

-jose
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From http  Fri Aug 24 21:53:30 2007
From: http (Paul Rubin)
Date: 24 Aug 2007 18:53:30 -0700
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
Message-ID: <7x3ay82xd1.fsf@ruckus.brouhaha.com>

tooru honda <tooru_honda at fast-mail.org> writes:
> The reasoning is as follows: Because the method random() only produces 
> finitely many possible results, we get modulo bias when the number of 
> possible results is not divisible by the size of the shuffled list.
> 
> 1. Does shuffle() produce uniform result ?

The nonuniformity is too small to matter.  But what is the
application?  If you are doing something like implementing online
poker for real money, you shouldn't use the built-in RNG.  It is not
designed for what we call adversarial indistinguishability from true
randomness.  Instead, use the random byte stream available from
os.urandom() and derive your random numbers from that.


From toby at tobiah.org  Mon Aug 20 16:26:57 2007
From: toby at tobiah.org (Tobiah)
Date: Mon, 20 Aug 2007 13:26:57 -0700
Subject: mode parameter in popen2-4
Message-ID: <46c9ed0d$0$8173$88260bb3@free.teranews.com>

In the popen docs, a file like object is returned,
and may be read to or written to depending on the
'mode' parameter ('r', or 'w').

Why is the mode parameter needed for popen2 and greater,
when both a stdin and stdout object is returned?  One 
wouldn't want to 'append' to a stream.... is it because
binary mode can still be turned on and off this way?

Thanks,

Tobiah

-- 
Posted via a free Usenet account from http://www.teranews.com



From antroy at gmail.com  Mon Aug  6 05:01:32 2007
From: antroy at gmail.com (Ant)
Date: Mon, 06 Aug 2007 02:01:32 -0700
Subject: Best programs written completly in Python
In-Reply-To: <mailman.1645.1186315364.22759.python-list@python.org>
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
	<20070805112006.GA3558@gmail.com>
	<mailman.1645.1186315364.22759.python-list@python.org>
Message-ID: <1186390892.612195.198340@57g2000hsv.googlegroups.com>

On Aug 5, 12:31 pm, Campbell Barton <cbar... at metavr.com> wrote:
...
> * ubuntu have some of their install tools in python.

Gentoo Linux's "Portage" package management tool is written in Python.

--
Ant...

http://antroy.blogspot.com/




From mccredie at gmail.com  Tue Aug 28 20:56:52 2007
From: mccredie at gmail.com (Matimus)
Date: Wed, 29 Aug 2007 00:56:52 -0000
Subject: Haskell like (c:cs) syntax
In-Reply-To: <fb25uh$gl9$1@online.de>
References: <fb25uh$gl9$1@online.de>
Message-ID: <1188349012.502720.296440@x40g2000prg.googlegroups.com>

> Is there a pattern matching construct in Python like (head : tail), meaning
> 'head' matches the first element of a list and 'tail' matches the rest? I
> could not find this in the Python documentation.

Not really, but you could do something like this:

[code]
def foo(head, *tail):
    #do stuff with head and tail

foo(*seq)
[/code]

Also, Python 3.0 will have `Extended Iterable Unpacking'
http://www.python.org/dev/peps/pep-3132/

This isn't quite the same as Haskell's type matching, but would enable
similar behavior in some cases.

example:
[code]
head, *tail = seq
[/code]

Which would assign the first element of seq to head, and the remainder
to tail.

Matt



From aine_canby at yahoo.com  Fri Aug  3 09:39:12 2007
From: aine_canby at yahoo.com (aine_canby at yahoo.com)
Date: Fri, 03 Aug 2007 06:39:12 -0700
Subject: Replacing _xmlplus.dom.minidom with xml.dom.minidom
Message-ID: <1186148352.647143.68890@l70g2000hse.googlegroups.com>

Hi,

I'm working with a number of scripts which were written years ago for
my company for Python 2.2, and I'd like to update for Python 2.5. I
have written a script to add # -*- coding: cp1252 -*- to the beginning
of all my scripts, and that has fixed the encoding issues.

Another issue was the use of -

from _xmlplus.dom import minidom

http://sourceforge.net/project/showfiles.php?group_id=6473

I couldn't get a version of this module for  2.5, so I changed the
above to -

from xml.dom import minidom

The scripts I work with are all working now correctly for 2.5. But I
haven't been able to test the whole system as not all of it concerns
me. Anyway, my colleges are interested in updating also if it will be
reasonably hassle free.

So my main concern now is the use of  _xmlplus.dom.minidom. Why was it
used and what differences should  I look out for with regard to
xml.dom.mididom

Thanks very much for your help,

Barry.



From conra2004 at yahoo.com  Fri Aug 17 13:07:09 2007
From: conra2004 at yahoo.com (yadin)
Date: Fri, 17 Aug 2007 10:07:09 -0700
Subject: help on object  programing
Message-ID: <1187370429.041002.205500@d55g2000hsg.googlegroups.com>

class big(self):

    x = 32
    list = []
    def inside (self):

        class small(self): # a new class defined inside the first

            y = 348
            list.append(y) # send the value to first list
            list.append(x)

print list

how can i define my variables so that there are valid outside the
class???



From deets at nospam.web.de  Wed Aug 22 04:52:54 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 22 Aug 2007 10:52:54 +0200
Subject: redirect or cover .bat log
References: <1187764689.836375.212730@z24g2000prh.googlegroups.com>
	<5j26bvF3s7lbpU2@mid.uni-berlin.de>
	<1187767578.925671.107000@q4g2000prc.googlegroups.com>
Message-ID: <5j2br6F3r2avsU1@mid.uni-berlin.de>

 vedrandekovic at v-programs.com wrote:

> On 22 kol, 09:19, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> vedrandeko... at v-programs.com schrieb:
>>
>> > Hello,
>>
>> > e.g I need run my my_scripts_setup.bat that contain:
>>
>> > python myscript_setup.py py2exe
>>
>> > Can I cover or redirect log of that process into my wx program?
>> > I'am using Windows XP SP2, and Python 2.5.
>>
>> Who's running the bat, and who's running the wx program?
>>
>> Diez
> 
> Hi,
> 
> First I convert my main wx program to exe with my py2exe setup,then
> under my main program (exe),
> I must run that .bat file and redirect or cover that process.

Still not very clear. But running a bat-file should be possible with the
subprocess module that also has facilities to grab stdout of the child
process.

Diez


From martin at v.loewis.de  Wed Aug 29 10:40:49 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 29 Aug 2007 16:40:49 +0200
Subject: strange list comprehension on generator
In-Reply-To: <mailman.105.1188396882.28954.python-list@python.org>
References: <mailman.105.1188396882.28954.python-list@python.org>
Message-ID: <46D58571.7090204@v.loewis.de>

> #this does not return the way I would expect. why?

You yield the very same list object all the times. So
when you make a later change, all earlier results will
get changed, too (since they are the same object).
Of course, it won't affect the terminal output, so you
don't see that the older values changed in the example
that you think works as expected.

HTH,
Martin


From google at mrabarnett.plus.com  Thu Aug 30 15:12:01 2007
From: google at mrabarnett.plus.com (MRAB)
Date: Thu, 30 Aug 2007 12:12:01 -0700
Subject: list index()
In-Reply-To: <mailman.151.1188496838.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<mailman.151.1188496838.28954.python-list@python.org>
Message-ID: <1188501121.878032.165810@x40g2000prg.googlegroups.com>

On Aug 30, 7:00 pm, Steve Holden <st... at holdenweb.com> wrote:
> zzbba... at aol.com wrote:
> >> How could it not be an exception, in the plain English sense of the
> >> word? Most certainly you're asking for the index because you want to do
> >> something with the index. If the item is not found, you have no index,
> >> so that's a special case that must be handled separately. There is no
> >> logical difference between handling that special case in an except
> >> clause versus handling it with an if-branch.
>
> > In my case of have done os.listdir() on two directories. I want to see
> > what files are in directory A that are not in directory B.
> > I have used exceptions in other languages and only do so on logic that
> > should never happen. In this case it is known that some of the files
> > will not be in both lists. I just want to know which ones.
>
> And, as is so often the case, once the *real* problem is stated a more
> elegant solution become available - in this case, using sets.
>
> afiles = set(os.listdir(dira))
> bfiles = set(os.listdir(dirb))
>
> for f in (afiles - bfiles):
>    print "Not common:", f
>
> You can also generate the files that are in one directory but ot the
> other with
>
> (afiles | bfiles) - (afiles & bfiles)
>
... which can be written more concisely as:

    afiles ^ bfiles

:-)



From max at alcyone.com  Tue Aug 14 03:42:55 2007
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 14 Aug 2007 00:42:55 -0700
Subject: about negative polar plots
In-Reply-To: <1187076466.955318.249250@57g2000hsv.googlegroups.com>
References: <1187076466.955318.249250@57g2000hsv.googlegroups.com>
Message-ID: <9radnTbkCoefwFzbnZ2dnUVZ_vPinZ2d@speakeasy.net>

yadin wrote:

> hi am doing a polar plot of the radiation pattern of an antenna.
> the polar plots represents the value of the power in dB's and the dB
> go from -40dB to 0dB
> as the angle theta changes from 0 to 2*pi rads
> the polar plot in python goes with positive values
> how can i solve this problem
> rough example
> example:
> power = arange(-40,0,-10)
> theta = arange(0, 2pi,pi/12)
> polar(power,theta)
> title.....?
> how can i show the step on the polar plot  plot(-40, -30,-20,-10,0)

What is arange?  What is polar?  What is plot?  You're going to have to 
give more information about what you're doing, what you're using to do 
it, and where it's giving you unexpected or undesired results if you 
want help solving your problem.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   So look into my eyes / I won't tell you lies
    -- Neneh Cherry


From gagsl-py2 at yahoo.com.ar  Thu Aug  2 07:50:18 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 02 Aug 2007 08:50:18 -0300
Subject: Representation of new-style instance
References: <2444B7FA-6F4C-4659-8055-0D527711263B@rice.edu>
Message-ID: <op.twfkh4l3x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 01 Aug 2007 20:14:06 -0300, Raj B <rajb at rice.edu> escribi?:

> Consider a new-style class
>
> class rabbit(object):
>        def __init__(self,c):
>             self.color = c
>
> r1=rabbit("blue")
> r2=rabbit("purple")
>
> Which C struct in the Python implementation is used to represent the
> instances c1 and c2 of the
> new-style class? I understand that when the class 'rabbit' is
> created, the type_new function
> in typeobject.c creates a copy of a 'struct typeobject' with
> dictionary tp_dict appropriately modified.

Yes. Then, rabbit("blue") means "call rabbit with a single argument,  
blue". The slot tp_call is searched, giving usually type_call, which  
itself calls tp_new (type_new if not overriden). (see type_call in  
typeobject.c).

> However, I can't figure out which structure is used for new-style
> instances and where the instance dictionary is stored. Could anyone
> please clarify?

All objects in Python are based on a PyObject structure; see object.h
Different object types have additional fields at the end, but all share  
the same basic layout.

-- 
Gabriel Genellina



From shahargs at gmail.com  Tue Aug  7 04:54:07 2007
From: shahargs at gmail.com (shahargs at gmail.com)
Date: Tue, 07 Aug 2007 01:54:07 -0700
Subject: get wikipedia source failed (urrlib2)
Message-ID: <1186476847.728759.166610@o61g2000hsh.googlegroups.com>

Hi,
I'm trying to get wikipedia page source with urllib2:
    usock = urllib2.urlopen("http://en.wikipedia.org/wiki/
Albert_Einstein")
    data = usock.read();
    usock.close();
    return data
I got exception because HTTP 403 error. why? with my browser i can't
access it without any problem?

Thanks,
Shahar.



From wolf_tracks at invalid.com  Wed Aug 22 23:41:11 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Wed, 22 Aug 2007 20:41:11 -0700
Subject: Baby Steps, optionDB
Message-ID: <Uk7zi.1531$vU4.979@nlpi068.nbdc.sbc.com>

I'm just playing with Python. It's my first outing. The program is below. I 
thought I'd fuss with numbers, and then get bold and try some Tkinter stuff.
  I copied the root stuff from a book (Grayson), and get stopped at the 
optionDB statement. What's wrong? I get
    clError: couldn't open "optionDB": no such file or directory
from Idle. Does the Tk code need to be up higher? The book is dated 2000, so 
maybe that item no longer exists.

----------------------
#!/usr/bin/python

from Numeric import *
from Tkinter import *

a=3.14
d=cos(a)
b=2
c=a+b
print "sum is = ",c, "and cos = ", d
print "arcos is ", arccos(d)
print "sqrt of d is ", sqrt(-d+3)


root = Tk()
root.option_readfile('optionDB')
root.title('TopLevel')
print "Onward"

Label(root, text='Very Top').pack(pady=10)

t1 = Toplevel(root)
Label(t1, text='A little Math').pack(padx=10, pady=10 )
print "Of to the races!"
t2 = Toplevel(root)
# t2.transient(root)
print "here we go"
t3=Toplevel(root, borderwidth=5, bg='blue')
t3.orverrideredredirect(1)
t3.geometry('200x70+15+150')

root.mainloop()
-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From bignose+hates-spam at benfinney.id.au  Thu Aug  2 18:07:38 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 03 Aug 2007 08:07:38 +1000
Subject: Experimentation and dealing with transient broken code (was: Python
	end of file marker similar to perl's __END__)
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
	<1185976656.753817.27980@x40g2000prg.googlegroups.com>
	<874pjidcvv.fsf@benfinney.id.au>
	<pan.2007.08.02.12.40.48.911929@REMOVE.THIS.cybersource.com.au>
Message-ID: <87d4y5bnf9.fsf_-_@benfinney.id.au>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:

> It's not just "bad syntax" that makes the triple-quote or comment
> trick useful.

Okay. That was the original reason given for refusing suggestions like
"return early from the function" etc. I answered in that context.

> Because you're experimenting, you might end up with ten different
> versions of a function, and not all of them will compile, let alone
> execute correctly.

If a function doesn't compile, I don't understand why you're not
either throwing it away or fixing it.

As for multiple versions? That's what version control is for. With
client-only, distributed VCSes like Bazaar and Mercurial (both written
in Python) you don't even have to do anything other than install the
software to begin using it.

There's no reason not to be using a version control system any time
you're coding ? even (especially!) while "just experimenting".

> It's handy to be able to comment them out and reload() the file

Why not simply fix them and reload() instead? Why keep something
inside the module that doesn't work, and indeed has just been proven
not to work? (If the only reason is "because I might need it later",
again, that's what a VCS is for.)

-- 
 \        "I'd take the awe of understanding over the awe of ignorance |
  `\                                       any day."  -- Douglas Adams |
_o__)                                                                  |
Ben Finney


From antroy at gmail.com  Tue Aug 21 08:35:10 2007
From: antroy at gmail.com (Ant)
Date: Tue, 21 Aug 2007 05:35:10 -0700
Subject: C# and Python
In-Reply-To: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
References: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
Message-ID: <1187699710.839869.32810@57g2000hsv.googlegroups.com>

On Aug 21, 11:01 am, subeen <tamim.shahr... at gmail.com> wrote:
> Hi,
...
> But I want to write the GUI and number generation program in C#.net.
> When the user clicks Quick Sort button, the quicksort.py will be
> called and it will sort the numbers.

Probably worth looking at IronPython, the Python implementation for
the .Net platform.

--
Ant...

http://antroy.blogspot.com/




From rupole at hotmail.com  Tue Aug 28 21:21:21 2007
From: rupole at hotmail.com (Roger Upole)
Date: Tue, 28 Aug 2007 21:21:21 -0400
Subject: Getting subprocesses to be hidden on Windows
References: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
	<YtCdnYoSetVu10nbnZ2dnUVZ_oDinZ2d@comcast.com>
	<1188324798.742700.173970@w3g2000hsg.googlegroups.com>
Message-ID: <1188350316_10681@sp12lax.superfeed.net>


geoffbache wrote:
> On 28 Aug, 18:18, Larry Bates <larry.ba... at websafe.com> wrote:
>> geoffbache wrote:
>> > Hi,
>>
>> > As part of my efforts to write a test tool that copes with GUIs
>> > nicely, I'm trying to establish how I can start a GUI process on
>> > Windows that will not bring up the window. So I try to hide the window
>> > as follows:
>>
>> > info = subprocess.STARTUPINFO()
>> > info.dwFlags |= subprocess.STARTF_USESHOWWINDOW
>> > info.wShowWindow = subprocess.SW_HIDE
>>
>> > proc = subprocess.Popen(..., startupinfo=info)
>>
>> > This works, in a way, but doesn't work recursively. I.e. if the
>> > started process itself starts a window, that second window will not be
>> > hidden. This even applies to dialog boxes within the application. So
>> > instead of a lot of windows popping up I now get a lot of disembodied
>> > dialogs appearing, which is a slight improvement but not much.
>>
>> > Also, certain processes (e.g. tkdiff) seem to ignore the directive to
>> > be hidden altogether.
>>
>> > This is dead easy on UNIX with virtual displays like Xvfb. Can someone
>> > shed any light if it's possible on Windows from python?
>>
>> > Regards,
>> > Geoff Bache
>>
>> While I'm not entirely sure I understand what you want, I think you can
>> accomplish it by using win32CreateProcess instead of subprocess.  You can run
>> the application minimized or perhaps in a REALLY small window.  If you have
>> modal dialog boxes, I don't think you can do anything as they don't run in the
>> parent windows frame but rather outside (I could be wrong about this).
>>
>> -Larry
>
> Hi Larry,
>
> I don't know if that would help. I've tried running minimized from the
> command line as
> suggested by Mike and that has the same issue (child windows and
> dialogs don't get minimized)
> So the question is moving away from how to technically achieve this in
> Python to whether
> Windows even supports it...
>
> Geoff

You might want to look into running the tests on a separate desktop (or possibly
even a new window station).

              Roger




From vedrandekovic at v-programs.com  Sat Aug 11 05:41:26 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Sat, 11 Aug 2007 02:41:26 -0700
Subject: python 2.5 bug
Message-ID: <1186825286.493878.80380@l70g2000hse.googlegroups.com>

Hello,

I was install Python 2.5 and uninstall Python 2.4 now I cannot run my
scripts, only from idle

What should I do?


Regards,
Vedran



From stefan.behnel-n05pAM at web.de  Wed Aug  1 16:24:28 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 01 Aug 2007 22:24:28 +0200
Subject: Emacs + python
Message-ID: <46b0ebfc$0$3842$9b4e6d93@newsspool4.arcor-online.net>


Hadron wrote:
> Could anyone put me on the right track to developing Python with emacs
> please : modes to consider, debugging etc hopefully all within emacs.
> 
> Any help and shared experiences much appreciated.

AFAIR, the Python distribution comes with a Python mode for Emacs.

Apart from that, see here:

http://www.python.org/emacs/

Stefan


From uymqlp502 at sneakemail.com  Wed Aug 29 02:45:28 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Tue, 28 Aug 2007 23:45:28 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188367108.393207.241970@g4g2000hsf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
Message-ID: <1188369928.755777.142690@i38g2000prf.googlegroups.com>

On Aug 28, 10:58 pm, Michele Simionato <michele.simion... at gmail.com>
wrote:

> Why do you think that would ad a strong positive capability?
> To me at least it seems a big fat lot of over-engineering, not
> needed in 99% of programs. In the remaining 1%, it would still not
> be needed since Python provides out of the box very powerful
> metaprogramming capabilities so that you can implement
> yourself the checks you need, if you really need them.

I get the strong impression you don't really understand what
programming by contract is.

I have not yet personally used it, but I am interested in anything
that can help to make my programs more reliable. If you are
programming something that doesn't really need to be correct, than you
probably don't need it. But if you really need (or want) your software
to be correct and reliable as possible, I think you you should be
interested in it. You might want to read this:

http://archive.eiffel.com/doc/manuals/technology/contract/ariane/page.html



From oliver at ootbc.com  Thu Aug 16 17:51:04 2007
From: oliver at ootbc.com (Oliver Nelson)
Date: Thu, 16 Aug 2007 14:51:04 -0700
Subject: Cancelling events on a COM Object
Message-ID: <bF3xi.1834$4w7.1163@newssvr22.news.prodigy.net>

I have MapPoint working in Python, and I'm trying to cancel events on 
the map, but I can't seem to make that happen.  I'm responding to the 
events successfully in my panel object.  My code is like this:

global MapPointMod
MapPointMod = 
win32com.client.gencache.EnsureModule("{51C0A9CA-F7B7-4F5A-96F4-43927C6FA50F}", 
0, 1, 0)

class MyPanel(wx.Panel):
     def __init__(self, *args, **kwds):
         # begin wxGlade: MyPanel.__init__
         kwds["style"] = wx.TAB_TRAVERSAL
         wx.Panel.__init__(self, *args, **kwds)
         self.frame = args[0]

         MyMap = MakeActiveXClass(MapPointMod.MappointControl, 
eventObj=self)
         self.window_1 = MyMap(self, -1)
         self.window_1.OpenMap("C:\\TEMP\\GPS_ON.ptt")
...
...
     def OnBeforeClick(self, Button, Shift, X, Y, Cancel):
         print "tada"


My event fires just fine, but I can't seem to figure out how to cancel 
the event so that mappoint doesn't do its stuff with it...I've tried 
setting Cancel based on the mappoint specs, but it doesn't seem to get 
sent back anywhere...

Any ideas please?

Thanx,

OLIVER


From martinezfive at comcast.net  Mon Aug 13 23:09:29 2007
From: martinezfive at comcast.net (kcfmartinez)
Date: Tue, 14 Aug 2007 03:09:29 -0000
Subject: Duke's Bank Equivalent?
Message-ID: <f9r6d9+f081@eGroups.com>

Hi,
    The J2EE tutorial provides developers with "The Duke's Bank",
which can be used for implementing a banking application (customer's
make deposits, withdrawls, earn interest, etc.).  Does anyone know of
an equivalent in Python?
    Thanks in advance.



From vinod.patil1 at gmail.com  Fri Aug  3 17:14:45 2007
From: vinod.patil1 at gmail.com (vinod)
Date: Fri, 03 Aug 2007 14:14:45 -0700
Subject: amra and py2exe
Message-ID: <1186175685.531985.207190@e9g2000prf.googlegroups.com>

Hi i am having trouble creating exe using py2exe for amara package
i saw some posts related to this talking about amara cat file but i
dont have any cat file for amara on my machine.
the standalone script runs fine. i am using python on windows
here is the error i am getting while creating the exe
The following modules appear to be missing
['amara', 'ext.IsDOMString', 'ext.SplitQName']

can anybody please help me with this?

Thanks,
Vinod



From cdleary at gmail.com  Thu Aug  2 10:08:14 2007
From: cdleary at gmail.com (cdleary at gmail.com)
Date: Thu, 02 Aug 2007 07:08:14 -0700
Subject: Case study: library class inheritance with property declarations
In-Reply-To: <1186062582.975223.230270@g12g2000prg.googlegroups.com>
References: <1186062582.975223.230270@g12g2000prg.googlegroups.com>
Message-ID: <1186063694.311416.133390@i13g2000prf.googlegroups.com>

On Aug 2, 6:49 am, cdle... at gmail.com wrote:
> Hi all,
>
> It's possible that I'm missing the obvious -- I've been up for over 24
> hours and I'm most likely dehydrated from mass coffee intake, but I
> figure many people in similar circumstances will be searching
> comp.lang.python one day, so here goes!
>
> class LibraryClass(object):
>
>     """
>     A class whose implementation is out of my hands.
>     """
>
>     def __init__(self):
>         """
>         Follows good dynamic-language form and binds all instance
>         variables at initialization time.
>         """
>         # Omitted: complex initialization functionality.
>         self.useful_attr = None
>
> class MyInheritedClass(LibraryClass):
>
>     """
>     My refinement of the functionality offered by the LibraryClass. I
>     now want the instance to initialize with a reference to an
> external
>     object, and the useful_attr defined in the superclass will now
>     reference an attribute of that external object via fget.
>
>     Changing the attribute of the external object has undefined
>     behavior, so I want to omit an fset in the property declaration;
>     however, I have to provide some way for the superclass to
>     initialize useful_attr -- I can't change the superclass' code, as
> it
>     resides in a library that is out of my hands.
>     """
>
>     def __init__(self, external_obj):
>         LibraryClass.__init__(self)
>         self._external_obj = external_obj
>
>     def get_useful_attr(self):
>         return self._external_obj.proxy_useful_attr
>
>     useful_attr = property(fget=get_useful_attr)
>
> def test():
>     class _Fake(object):
>         pass
>     external_obj = _Fake()
>     external_obj.proxy_useful_attr = 12
>     spam = MyInheritedClass(external_obj)
>
> if __name__ == '__main__':
>     test()
> EOF
>
> If you're one of those people who doesn't like laboriously reading
> contrived examples (elitists ;) I'll boil it down for you: Library
> class initializes some attribute, but derived class wants to eliminate
> fsets for said attribute. As a result, our ideal solution
>
> Of course, this means that the derived class will raise an error in
> some circumstances where the base class wouldn't (when you're setting
> that attribute), but one can assume that the inheritance is
> worthwhile.
>
> How do I come up with silly solutions to circumvent this? Let me count
> the ways...
>
> 1. So-and-so: make an fset that does nothing. This ignores (what
> should be) errors in code that uses MyInheritedClass in an attempt to
> accommodate a useless statement in the base class -- surely non-ideal.
> 2. The ugly one: since you can probably view the library, copy and
> paste the complex initialization functionality in the above, but leave
> out the bad statement. This not only forfeits the ideals of
> inheritance, but makes you totally incompatible with future library
> changes.
> 3. Cheerleader: Pure evil. On top of the ugliness of 2, you assume
> that across library revisions the indenting won't change and that the
> troublesome statement will remain on the same line, and pull off one
> of these babies:
>
> def super_evil_test():
>     from inspect import getsourcelines
>     exec(''.join([line[4:] for line in
>                   getsourcelines(LibraryClass.__init__)[0][:-1]]))
>     LibraryClass.__init__ = __init__
>     test() # Passes, but several angels no longer get their wings
>
> Totally kidding, everybody! I hope Guido doesn't read this thread...
>
> And this concludes the sleep deprived rambling that follows the
> somewhat interesting case in point. Thoughts?

I'm sorry -- the solution was not /enough/ coffee. Got another cup and
sat down with the type/class unification doc, and found this thought-
stimulating portion:

http://www.python.org/download/releases/2.2/descrintro/#property
If you want to override the __get__ operation for properties when used
as a class attribute, you can subclass property - it is a new-style
type itself - to extend its __get__ method, or you can define a
descriptor type from scratch by creating a new-style class that
defines __get__, __set__ and __delete__ methods.
...
The get method won't be called when the property is accessed as a
class attribute (C.x) instead of as an instance attribute (C().x).


Seeing as how property is just a wrapper class, we don't need to
declare it in the class body, though it /is/ the convention and the
way it's done in all the docs I've seen. We fix our inherited class to
be the following:

[snip]
class MyInheritedClass(LibraryClass):

    """
    My refinement of the functionality offered by the LibraryClass. I
    now want the instance to initialize with a reference to an
external
    object, and the useful_attr defined in the superclass will now
    reference an attribute of that external object via fget.

    Changing the attribute of the external object has undefined
    behavior, so I want to omit an fset in the property declaration;
    however, I have to provide some way for the superclass to
    initialize useful_attr -- I can't change the superclass' code, as
it
    resides in a library that is out of my hands.
    """

    def __init__(self, external_obj):
        LibraryClass.__init__(self)
        self.useful_attr = property(fget=self.get_useful_attr)
        self._external_obj = external_obj

    def get_useful_attr(self):
        return self._external_obj.proxy_useful_attr
[snip]

And it tests like a charm.



From tjreedy at udel.edu  Thu Aug  2 16:27:28 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 2 Aug 2007 16:27:28 -0400
Subject: i am new to python-Please somebody help
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com><1186063842.827016.95030@q3g2000prf.googlegroups.com><mailman.1520.1186073909.22759.python-list@python.org>
	<1186081737.357371.232040@i13g2000prf.googlegroups.com>
Message-ID: <f8tene$8a6$1@sea.gmane.org>


"gregarican" <greg.kujawa at gmail.com> wrote in message 
news:1186081737.357371.232040 at i13g2000prf.googlegroups.com...
| On Aug 2, 12:58 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
|| > Sorry, I saw nothing rude in Steven's straightforward and indeed 
polite
| > suggestion.  Your post, however, ....
| >
| > tjr
|
| Maybe it's just me but the word "grovelling" just doesn't ring of
| newbie friendliness. To each their own I guess.

I'll give you half a point here.  I have seen enough friendly, helpful 
posts from Steven that I am predisposed to give a friendly interpretation, 
especialy when additional helpful suggestions follow.  'Stop grovelling' 
<send> *would* have been rude, but that is far away from what Steven 
posted.

| Kind of like the
| Smalltalk list where a few respondents are really dry. Someone will
| post asking something like "Can I use Smalltalk to do X so that it
| talks to Y?" One guy (without pointing to a link or offering a
| snippet) just posts "Yes." I guess literally they have contributed. Or
| someone calls your house and asks, "Is so-and-so there?" You just say
| "Yes" and hang up on them :-)

I'll take the half point back here ;-).  "Yes <click>" is precisely what 
Steven did not do, so it was *not* 'kind of like'.  He followed with a 
useful suggestion and example link.

tjr





From wolf_tracks at invalid.com  Sun Aug 19 18:48:45 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sun, 19 Aug 2007 22:48:45 GMT
Subject: Python on Computation, Math and Statistics
In-Reply-To: <1187559452.083196.221570@d55g2000hsg.googlegroups.com>
References: <m_%xi.34088$2v1.7394@newssvr14.news.prodigy.net>
	<5irgvaF3oi5dpU2@mid.uni-berlin.de>
	<DU0yi.1286$Oo.199@newssvr17.news.prodigy.net>
	<1187559452.083196.221570@d55g2000hsg.googlegroups.com>
Message-ID: <hN3yi.46929$Um6.29806@newssvr12.news.prodigy.net>

Thanks.

Paul McGuire wrote:
> On Aug 19, 2:32 pm, "W. Watson" <wolf_tra... at invalid.com> wrote:
>> Google? What's that? Thanks. I like to get a insider's view when I know
>> experts are out there.
> 
> FYI the "insiders" and "experts" out there appreciate knowing that you
> did a little work on your own before just posting questions. "I like
> to get a insider's view when I know experts are out there" translates
> to "My time is more valuable than other peoples', so I'll just ask
> them to answer my questions instead of doing 5 minutes of digging for
> myself."
> 
> Comments?  Here's mine: go away and come back after you've done some
> homework.
> 
> -- Paul
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From python at jayloden.com  Sat Aug  4 02:46:16 2007
From: python at jayloden.com (Jay Loden)
Date: Sat, 04 Aug 2007 02:46:16 -0400
Subject: Website data-mining.
In-Reply-To: <1186207478.055593.107110@z24g2000prh.googlegroups.com>
References: <mailman.1603.1186196436.22759.python-list@python.org>
	<1186207478.055593.107110@z24g2000prh.googlegroups.com>
Message-ID: <46B420B8.3000908@jayloden.com>

Miki wrote:
> Hello,
> 
>> I'm using Python for the first time to make a plug-in for Firefox.
>> The goal of this plug-in is to take the source code from a website
>> and use the metadata and body text for different kinds of analysis.
>> My question is: How can I retrieve data from a website? I'm not even
>> sure if this is possible through Python. Any help?
> Have a look at http://www.myinterestingfiles.com/2007/03/playboy-germany-ads.html

Well, it's certainly interesting, but I'm not sure how it might help the OP get data from a website...

> for getting the data and at http://www.crummy.com/software/BeautifulSoup/
> for handling it.
> 
> HTH.
> 
> --
> Miki Tebeka <miki.tebeka at gmail.com>
> http://pythonwise.blogspot.com
> 


From ldo at geek-central.gen.new_zealand  Wed Aug 29 04:34:29 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Wed, 29 Aug 2007 20:34:29 +1200
Subject: encoding problems
References: <46d5215b$0$411$426a74cc@news.free.fr>
Message-ID: <fb3au1$v9m$1@lust.ihug.co.nz>

In message <46d5215b$0$411$426a74cc at news.free.fr>, tool69 wrote:

> p2.content = """Ce poste poss?de des accents : ? ? ? ?"""

My guess is this is being encoded as a Latin-1 string, but when you try to
output it it goes through the ASCII encoder, which doesn't understand the
accents. Try this:

p2.content = u"""Ce poste poss?de des accents : ? ? ? ?""".encode("utf8")



From zhushenli at gmail.com  Mon Aug 27 23:23:05 2007
From: zhushenli at gmail.com (Davy)
Date: Mon, 27 Aug 2007 20:23:05 -0700
Subject: How to parse this line of code manually
In-Reply-To: <1188270013.785762.9360@z24g2000prh.googlegroups.com>
References: <1188270013.785762.9360@z24g2000prh.googlegroups.com>
Message-ID: <1188271385.875677.78560@i38g2000prf.googlegroups.com>

On Aug 28, 11:00 am, Davy <zhushe... at gmail.com> wrote:
> Hi all,
>
> It is well known that Python is appreciated for its merit of concise.
> However, I found the over concise code is too hard to understand for
> me.
>
> Consider, for instance,
> def known_edits2(word):
>     return set(e2 for e1 in edits1(word) for e2 in edits1(e1) if e2 in
> NWORDS)
>
> Shall I understand the code in set() as
> for e2 in edits1(e1) {
>     if e2 in NWORDS {
>         for e1 in edits1(word) {
>              e2
>         }
>     }
>
> }
>
[SNIP]
Hi all, I figured it myself. It is left to righ parse, right?
So the above one is like
for e1 in edits1(word) {
    for e2 in edits1(e1) {
        if e2 in NWORDS {
            push e2 to set
        }
    }
}
> And a general question is: Is there any tip available to understand
> the code in one line, or what's the parsing priority (left to right,
> right to left, or other possibilities)
>
> Any suggestions are welcome!
>
> The code is a simple spell checker fromhttp://www.norvig.com/spell-correct.html
>
> Best regards,
> Davy




From rhamph at gmail.com  Thu Aug 30 13:37:27 2007
From: rhamph at gmail.com (Rhamphoryncus)
Date: Thu, 30 Aug 2007 17:37:27 -0000
Subject: Is LOAD_GLOBAL really that slow?
In-Reply-To: <mailman.130.1188441225.28954.python-list@python.org>
References: <aac2c7cb0708291823h15e3f675mbeae9ecf37d653b6@mail.gmail.com>
	<mailman.130.1188441225.28954.python-list@python.org>
Message-ID: <1188495447.083333.271540@q4g2000prc.googlegroups.com>

On Aug 29, 8:33 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> On Wed, 2007-08-29 at 19:23 -0600, Adam Olsen wrote:
> > It seems a common opinion that global access is much slower than local
> > variable access.  However, my benchmarks show a relatively small
> > difference:
>
> > ./python -m timeit -r 10 -v -s 'x = [None] * 10000
> > def foo():
> >   for i in x:
> >     list; list; list; list; list; list; list; list; list; list' 'foo()'
> > 10 loops -> 0.0989 secs100 loops -> 0.991 secs
> > raw times: 0.999 0.985 0.987 0.985 0.985 0.982 0.982 0.982 0.981 0.985
> > 100 loops, best of 10: 9.81 msec per loop
>
> > ./python -m timeit -r 10 -v -s 'x = [None] * 10000
> > def foo():
> >   mylist = list
> >   for i in x:
> >     mylist; mylist; mylist; mylist; mylist; mylist; mylist; mylist;
> > mylist; mylist' 'foo()'
> > 10 loops -> 0.0617 secs
> > 100 loops -> 0.61 secs
> > raw times: 0.603 0.582 0.582 0.583 0.581 0.583 0.58 0.583 0.584 0.582
> > 100 loops, best of 10: 5.8 msec per loop
>
> > So global access is about 70% slower than local variable access.  To
> > put that in perspective, two local variable accesses will take longer
> > than a single global variable access.
>
> > This is a very extreme benchmark though.  In practice, other overheads
> > will probably drop the difference to a few percent at most.  Not that
> > important in my book.
>
> Your comparison is flawed, because the function call and the inner for
> loop cause a measurement offset that makes the locals advantage seems
> smaller than it is. In the interest of comparing the times for just the
> local lookup versus just the global lookup, I think the following
> timings are more appropriate:

That's why I used far more name lookups, to minimize the overhead.


> $ python2.5 -mtimeit -r10 -s"y=42" -s"def f(x): pass" "f(42)"
> 1000000 loops, best of 10: 0.3 usec per loop
> $ python2.5 -mtimeit -r10 -s"y=42" -s"def f(x): x" "f(42)"
> 1000000 loops, best of 10: 0.331 usec per loop
> $ python2.5 -mtimeit -r 10 -s"y=42" -s"def f(x): y" "f(42)"
> 1000000 loops, best of 10: 0.363 usec per loop

On my box, the best results I got after several runs were 0.399,
0.447, 0464.  Even less difference than my original results.


> There is no loop overhead here, and after subtracting the function call
> overhead, I get 31 nanoseconds per local lookup and 63 nanoseconds per
> global lookup, so local lookups are just about twice as fast as global
> lookups.
>
> True, whether this difference is significant does depend on how many
> name lookups your code makes and how much else it's doing, but if you're
> doing a lot of number crunching and not a lot of I/O, the difference
> might be significant. Also, even if using local names is only slightly
> faster than using globals, it's still not slower, and the resulting code
> is still more readable and more maintainable. Using locals is a win-win
> scenario.

You get very small speed gains (assuming your code is doing anything
significant), for a lot of effort (trying out different options,
seeing if they're actually faster on different boxes.)  The
readability cost is there, even if it is smaller than many of the
other obfuscations people attempt.  If the speed gains were really
that important you should rewrite in C, where you'd get far greater
speed gains.

So it only seems worthwhile when you really, *really* need to get a
slight speedup on your box, you don't need to get any more speedup
than that, and C is not an option.

Fwiw, I posted this after developing yet another patch to optimize
global lookups.  It does sometimes show an improvement on specific
benchmarks, but overall it harms performance.  Looking into why, it
doesn't make sense that a python dictionary lookup can have less cost
than two simple array indexes, but there you go.  Python dictionaries
are already damn fast.

--
Adam Olsen, aka Rhamphoryncus



From steve at holdenweb.com  Thu Aug 23 23:15:09 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 23 Aug 2007 23:15:09 -0400
Subject: creating a tar file with python
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE2ED@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
	<faktv8$8fs$1@sea.gmane.org>
	<93066C069973ED448DC2BCEA9C44A7383BE2ED@efmailx>
Message-ID: <46CE4D3D.7020106@holdenweb.com>

Brian McCann wrote:
> 
> Hi,
>  
> I'm now getting this error
> any ideas?
> Thanks,
> Brian
> 
> 
> Traceback (most recent call last):
>   File "./tarup.py", line 25, in ?
>     tar = tarfile.open("test.xml","sample.tar.gz", 'w:gz')
>   File "/usr/lib64/python2.4/tarfile.py", line 929, in open
>     raise ValueError, "undiscernible mode"
> ValueError: undiscernible mode
> ############################################################
> #!/usr/bin/python
> import string
> import os
> import sys
> import time
> import errno
> import shutil
> import tarfile
> 
> tar = tarfile.open(test.xml","sample.tar.gz", 'w:gz')
>  
Well, my first idea is that you took the time to think beyond the 
mistake exhibited in your first response. But since a soft mattress is 
currently looking about a hundred times more attractive than actually 
trying to debug your code I am sorry to tell you I am going to punt on 
this one and trust that some other c.l.py netizen will take pity on you 
and probably help you with less crabby comments than me. Good luck!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From deets at nospam.web.de  Thu Aug  2 15:23:05 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 02 Aug 2007 21:23:05 +0200
Subject: __call__ considered harmful or indispensable?
In-Reply-To: <mailman.1527.1186079415.22759.python-list@python.org>
References: <mailman.1527.1186079415.22759.python-list@python.org>
Message-ID: <5hep95F3jde33U1@mid.uni-berlin.de>

skip at pobox.com schrieb:
> I don't personally use __call__ methods in my classes, but I have
> encountered it every now and then here at work in code written by other
> people.  The other day I replaced __call__ with a more obvious method name,
> so now instead of executing
> 
>     obj(foo, bar, baz)
> 
> the code in question is
> 
>     obj.execute(foo, bar, baz)
> 
> In this case there was a bug.  Depending on inputs, sometimes obj
> initialized to a class, sometimes an instance of that class.  (I fixed that
> too while I was at it.)  The problem was that the use of __call__ obscured
> the underlying bug by making the instance as well as the class callable.
> 
> In this particular case it was clearly unnecessary and just obfuscated the
> code.  I'm wondering, are there some general cases where __call__ methods of
> a user-defined class are simply indispensable?

Thanks to closures and bound methods, I don't think that there is  a 
case where you can't "fake" the missing __call__ at least when it comes 
to call-backs. So in the end, you can always work around that. But if 
you don't need to...

Se the gnosis multimethods for an implementation that makes sensible use 
of the __call__-operator in my opinion.

diez


From byte8bits at gmail.com  Wed Aug  8 09:38:49 2007
From: byte8bits at gmail.com (brad)
Date: Wed, 08 Aug 2007 09:38:49 -0400
Subject: This bit of code hangs Python Indefinitely
Message-ID: <f9ch45$ku$1@solaris.cc.vt.edu>

url_queue = Queue.Queue(256)
for subnet in subnets:
     url_queue.put(subnet)

The problem is that I have 512 things to add to the queue, but my limit 
is half that... whoops. Shouldn't the interpreter tell me that I'm an 
idiot for trying to do this instead of just hanging? A message such as 
this would be more appropriate:

"Hey fool, you told me to only accept 256 things and you're trying to 
give me 512... what's up with that?"


From pyth0nc0d3r at gmail.com  Tue Aug 28 17:04:39 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Tue, 28 Aug 2007 16:04:39 -0500
Subject: Okay learning python is somewhat hard.
Message-ID: <eb79828c0708281404m19e5d4e9u1e806ad8d8625dcf@mail.gmail.com>

Since I can't really focus on PROJECTS[since I don't know much python I
can't do any projects because all my projects are BIG], So I decided to work
on some problems I've gotten from school from started geometry, So I
attempted to make a script to get the midpoint of a line segment using the
formula giving:

[1 and 2 are subscripts]

X1 + X2
----------- = mid pt. (x)
     2

Y1 + Y2
----------- = mid pt. (y)
     2

So i tried coding the following script.

#MIDPOINT OF A LINE
class midpoint:
    def __init__(self,x1,x2,y1,y2):
        self.x1 = x1
        self.x2 = x2
        self.y1 = y1
        self.y2 = y2
        self.dictionary = {'x' : '','y' : ''}
        self.calculate_mid_point()
    def calculate_mid_point(self):
        X = self.x1 + self.x2
        X = X/2
        self.dictionary['x'] = X
        Y = self.y1 + self.y2
        Y = Y/2
        self.dictionary['y'] = Y
c_x = -2
c_y = -2
d_x = 4
d_y = 3
midpoint_ = midpoint(c_x,d_x,c_y,d_y)
print midpoint_.dictionary

It works and all, but I can't get the fraction or decimal from the output :S

Output:
{'y': 0, 'x': 1}

On my paper the real output is:
x = 1
y = 1/2
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From Shawn at Milochik.com  Wed Aug 15 15:22:23 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Wed, 15 Aug 2007 15:22:23 -0400
Subject: Python app to ration cell-phone minutes
Message-ID: <2dc0c81b0708151222v4cdab691j2a189521a7d5acd8@mail.gmail.com>

I wrote a little something so I could check my current minutes used to
see how I was doing for the month. I only get 1,000 minutes, and I
have three phones (two other family members share the plan). This way,
I can (theoretically) know ahead of time if I'm trending towards going
over my plan. By the way, I get free minutes on weekends, so it takes
that into consideration.

Everything is working fine. I'm just posting it in case anyone finds
it interesting or useful, and as always, comments or constructive
criticism are welcome.

Shawn



 $ cat cell.py
#!/usr/bin/env python

"""  Shows the number of minutes which can be use by the end of each
weekday without going over monthly minute limit. """

import time

#Set some constants
minuteLimit = 1000 #minutes in cell phone plan
oneDay = 60 * 60 * 24 #seconds in one day
cycleBegins = 27 #day of month billing cycle begins

date = time.time()

#Find the date of the first day of the billing cycle.
while time.localtime(date)[2] != cycleBegins:
    date -= oneDay

#Initialize the variables, setting them to one if necessary, because
we have to start the loop below at the cycleBegins + 1 to avoid
hitting the test immediately.
daysInCycle = 1
weekdaysInCycle = 0
if time.localtime(date)[6] < 5:
    weekdaysInCycle += 1

#Find total days and total weekdays in billing month (for proper
reporting of free weekend minutes)
testDate = date + oneDay

while time.localtime(testDate)[2] != cycleBegins:
    if time.localtime(testDate)[6] < 5:
        weekdaysInCycle += 1
    testDate += oneDay
    daysInCycle += 1

#Print number of days in cycle and the report.

print "%d total days and %d weekdays in the cycle." % (daysInCycle,
weekdaysInCycle)

weekdaysElapsed = 0
for daysElapsed in range(daysInCycle + 1)[1:]:
    if time.localtime(date)[6] < 5:
        weekdaysElapsed += 1
        print "%d/%d: %d"  % (time.localtime(date)[1],
time.localtime(date)[2], (minuteLimit/weekdaysInCycle)  *
weekdaysElapsed   )
    else:
        print "%d/%d: weekend"  % (time.localtime(date)[1],
time.localtime(date)[2])
    date += oneDay


From dhwild at talktalk.net  Fri Aug 31 12:39:02 2007
From: dhwild at talktalk.net (David H Wild)
Date: Fri, 31 Aug 2007 17:39:02 +0100
Subject: strings (dollar.cents) into floats
References: <mailman.140.1188483282.28954.python-list@python.org>
	<877incd20i.fsf@benfinney.id.au>
	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
	<1188575044.874256.42960@50g2000hsm.googlegroups.com>
	<fb9eas$tnc$1@sea.gmane.org>
	<mailman.218.1188577696.28954.python-list@python.org>
Message-ID: <46d84a47$0$1346$834e42db@reader.greatnowhere.com>

In article <mailman.218.1188577696.28954.python-list at python.org>,
   Chris Mellon <arkanes at gmail.com> wrote:
> I believe that to the degree that "real" accounting was done in those
> currencies it did in fact use non-decimal bases. Just as people don't
> use decimal time values (except us crazy computer folk), you're write
> 1 pound 4 shillings, not 1.333... pounds.

When I worked on the British Railways National Payroll system, about 35
years ago, we, in common with many large users, wrote our system to deal
with integer amounts of pennies, and converted to pounds, shillings and
pence in the output part of the system.

-- 
David Wild using RISC OS on broadband
www.davidhwild.me.uk


From horpner at yahoo.com  Thu Aug  9 11:52:37 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 09 Aug 2007 15:52:37 GMT
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<f9f9h5$fgg$1@wake.carmen.se>
Message-ID: <slrnfbme8u.230.horpner@FIAD06.norwich.edu>

On 2007-08-09, Magnus Lycka <lycka at carmen.se> wrote:
> It's all a matter of understanding that all the juicy bits in
> the Python data model is in the actual values or objects.
> That's the stuff with type safety, a location in memory,
> qualities such as mutability etc. A "variable" is basically
> just a reference to an arbitrary object in a particular
> namespace.

Excellent post.

Languages like C tried to make the scope of names and the extent
of the objects they refer to be the same, probably for
efficiency.  One nice property of this is that the two concepts
can be conflated into the simpler single idea of "variables".
It's simple, that is, until you create references. Then you can
get into complicated trouble by creating references to things
that may be destroyed. In Python names have lexical scope, while
the objects they refer to are eternal.

> Assignments semantics is not about copying data as in C, and
> it's nothing arbitrarily defined in classes as in C++. It's all
> about deciding which object a name refers to.

Assignment semantics are not arbitrary in C++. You do have to
define them manually for new data types, but if you get it wrong
your code is pretty much useless. You are free to create your own
assignment semantics, as long as they match the semantics of the
built in types. Python has this property as well, though you're
limited to screwing up the "augmented assignment/arithmetic"
operators.

-- 
Neil Cerutti


From wdraxinger at darkstargames.de  Tue Aug 21 11:54:33 2007
From: wdraxinger at darkstargames.de (Wolfgang Draxinger)
Date: Tue, 21 Aug 2007 17:54:33 +0200
Subject: File Read Cache - How to purge?
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
	<5ivl9fF3rafecU1@mid.uni-berlin.de>
Message-ID: <peerp4-k4b.ln1@darkstargames.dnsalias.net>

Marc 'BlackJack' Rintsch wrote:

> You mean reading the file without actually reading it!?  :-)

Linux provides its specific syscall 'readahead' that does exactly
this.

Wolfgang Draxinger
-- 
E-Mail address works, Jabber: hexarith at jabber.org, ICQ: 134682867



From slimgenius at yahoo.com  Mon Aug 27 16:11:47 2007
From: slimgenius at yahoo.com (slimgenius at yahoo.com)
Date: Mon, 27 Aug 2007 13:11:47 -0700
Subject: !!Quick Money!!   !!!!THIS IS INSANE!!! IT REALLY WORKS!!!
Message-ID: <1188245507.857469.94000@o80g2000hse.googlegroups.com>

      !!Quick Money!!   !!!!THIS IS INSANE!!! IT REALLY WORKS!!!
!!!!!!QUICK MONEY!!!!!! -- Jasmine, 08/18/07 Sat [1]
At first I thought this was too good to be true, how wrong I was!!
I decided to give it a go, it was only 6 dollars ,so why not?
Well I was astounded!! Money has, and still is coming to my account.
As Seen On OPRAH & 20/20 - TURN $6 into $24,600! (or more, that's
just
what he made)
Earn money using PAYPAL as seen on Oprah & 20/20
THE PAYPAL $6 DOLLAR MONEY-MAKING METHOD
AS SEEN ON OPRAH EARN HUGE $$$$$$$$
Ok this is all you need:
1) An email address
2) A PayPal account
3) $6.00
THIS IS A 2007, CURRENT EMAIL LIST
Ever since the internet became popular, the word "scam" has become a
daily term. I have never once tried any money making "system" outside
of this because of that very reason. However, after reading reports
on
the validity and reputation of this money making system (seen on
Oprah, CNN, and other media forums) I decided to give this one a
try... Especially since the so called "risk" is only $6.00. Anyway,
only hours after implementing this exact system I about fell out of
my
chair as money ACTUALLY started rolling in. I couldn't believe it and
for that reason, I wrote this intro and became a believer in this
system.?
WHAT IS IT?
The idea is that of a system that takes advantage of the power of
compounding. And in a big way, let me tell you. First and foremost
understand that there are countless spin-offs of this system that try
to make a "quick buck" off of people. Long lists, the 5 & 10 dollar
trees, the birthday systems, etc... Those spin-offs do make money
because of the ease of implementation of this idea, but they do NOT
use the compounding advantage. This system is THE legit and
profitable
one.
Here is how it works...
There is a list of 6 email addresses (you'll see it as you read
further). Each of these people has already taken part in this system.
When someone new comes along (such as yourself) he/she removes #1 off
of the list, moves the other five email addresses up one position
(i.e. #6 goes to #5, #5 to #4, etc.), and places their PayPal email
address in the #6 position. This process is what develops the power
of
compounding. The bottom line is this... Honesty and Integrity creates
Profitability. Following
this EXACT process is what creates the money, and that is why this
system has been raved about in the media. Altering the system creates
weak results. The legality of this system comes from the idea that
you
are of course creating a mailing list, and a "service" is being
provided (more on that later.) Now on to how your $6.00 creates BIG
money...
INSTRUCTIONS:
STEP 1:The first thing to do is highlight and SAVE this entire post
in
word
or notepad on your computer so you can come back to it later.
After that, if you are not already a PayPal user you need to go to
the PayPal website at https://www.paypal.com/ and SIGN UP. If you
want
to be able to receive credit card payments from other people then you
will need to sign up for a PREMIER or BUSINESS account (not just a
PERSONAL account). This is highly recommended to allow others easy
payment options. In order to place the initial $6 into your account,
you will have to verify your bank account with PAYPAL (which may take
a few
days). PAYPAL is 100% secure and is used by millions of people
worldwide.
STEP 2:Here is where the action occurs. The first thing to do is to
send a
$1.00 payment to each of the 6 email addresses on the current list
from your PayPal account. To do this quickly and successfully, follow
these simple steps:
1. Login to PayPal and click on the "Send Money" tab near the top of
the screen
2. In the "Recipient's Email" field enter the email address
3. In the "Amount" field enter "1" (This is your $1.00 payment)
4. In the "Category" field select "Service" (Keeping it legal)
5. In the "Subject" field type "EMAIL LIST", and in the "MESSAGE"
field enter "PLEASE PUT ME ON YOUR EMAIL LIST". By doing this, you
are
creating a service and maintaining the legality of the system by
"paying" for the service.
6. Finally, click on the "Continue" button to complete the payment.
Repeat these steps for each of the 6 email addresses. That's it! By
sending the $1.00 payment to each address, you are implementing the
compounding POWER of the system. You will reap what you sow!
Here is the current e-mail list:
*************************************************
The email list:
1) dsloane... at hotmail.com
2) giuseppemissi... at libero.it
3) wonderwall... at yahoo.com
4) blessed6... at yahoo.com
5) freesearc... at hotmail.com
6) ryan.woods at hotmail.com
************************************************
STEP 3:Now take the #1 email off of the list that you see above (from
your
saved file), move the other addresses up (6 becomes 5, 5 becomes 4,
etc.) and add YOUR email address (the one used for your PayPal
account) as number 6 on the list. This is the only part of the
document that should be changed. ** Make sure your email address is
the one you have registered with PayPal **
STEP 4 post your amended article to at least 200 newsgroups or
message
boards. Keep in mind that there are tens of thousands of groups
online! All you need is 200, but remember the more you post the more
money you make - as well as everyone else on the list! I've began to
see money roll in before I even hit 100 posts, but try to hit around
200 to allow maximum exposure. Use Netscape, Internet
Explorer,Firefox, Safari, or whatever your internet browser is to
search for various news groups, on-line forums, message boards,
bulletin boards, chat sites, discussions, discussion groups, on-line
communities, etc.
For example?
Log on to any search engine like yahoo.com or google.com and type in
a
subject like 'MILLIONAIRE MESSAGE BOARD',MONEY MAKING DISCUSSIONS',
'MONEY MAKING FORUMS', or 'BUSINESS MESSAGE BOARD', etc. You will
find
thousands and thousands of message boards. Click them one by one and
you will find the option to post a new message. Fill in the subject
which will be the header that everyone sees as they scroll through
the
list of postings in a particular group, and post the article with the
NEW list of email addresses included. THAT'S IT!!! All you have to do
is jump to different newsgroups and post away. After you get the hang
of it, it will take about 30 seconds for each newsgroup.
HOW THE MONEY WORKS:
When you post 200 messages in various forums, it is estimated that at
LEAST 15 people will respond and send you a $1.00 ($15.00). Those 15
will Post 200 Posts each and 225 people send you $1.00 ($225.00),
etc.
through 6 levels of email addresses. For comprehension purposes, here
is an easy viewing chart:
1) 15(1) = 15 people ($1) = $15
2) 15(15) = 225 people ($1) = $225
3) 15(225) = 3375 people ($1) = $3375
4) 15(3375) = 50625 people ($1) = $50625
5) 15(50625) = 759375 people ($1) = $759375
As you can see, your $6.00 has multiplied exponentially. What other
opportunity that is as simple as this can cash in the way this can?!
I'm not going to say this is going to make everyone over $800,000,
but
within a few WEEKS you begin to see results, thanks to the speed of
the internet!
When your name is no longer on the list, take the latest posting in
the newsgroups and begin the process again. Simply amazing...
Follow the system as described, and enjoy your PROFITS!!!
REMEMBER... HONESTY AND INTEGRITY = PROFITABILITY
YOUR NAME COULD CYCLE FOR A LONG TIME! THIS MAKES IT THE GIFT THAT
KEEPS ON GIVING.
This is excellent seed money to start or expand a business, buy your
dream home, car and pay off whatever bills you may have. Good luck!
HOW TO POST TO NEWS GROUPS?
Use Netscape or Internet Explorer and try searching for various
newsgroups (on-line forums, message boards, chat sites, discussions.)
Log on any search engine like yahoo.com, google.com, altavista.com,
excite.com, etc., then search with the subject "millionaire message
board; or; money making message board; or; employment message board;
or making discussions; or ''money making forum; or; business message
board; etc.
You will find thousands & thousands of message boards.
Click on them one by one and you will find the option 'post a new
message'. Then Post this article as a 'new message' by highlighting
the text of this letter and selecting copy then paste from the edit
menu. Fill in the Subject, this will be the header that everyone sees
as they scroll through the list of postings in a particular group,
click the post message button. You're done with your first one! It
only takes about 60 seconds to complete postings on message boards
after you catch on.
REMEMBER, THE MORE NEWSGROUPS YOU POST IN, THE MORE MONEY YOU WILL
MAKE!!
GOOD LUCK!!



From horpner at yahoo.com  Mon Aug  6 10:45:13 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 06 Aug 2007 14:45:13 GMT
Subject: Scope question
References: <mailman.1670.1186405654.22759.python-list@python.org>
Message-ID: <slrnfbed5h.1kg.horpner@FIAD06.norwich.edu>

On 2007-08-06, Nitro <nitro at dr-code.org> wrote:
> Hello,
>
> today I wrote this piece of code and I am wondering why it does
> not work  the way I expect it to work. Here's the code:
>
> y = 0
> def func():
>      y += 3
> func()
>
> This gives an
>
> UnboundLocalError: local variable 'y' referenced before
> assignment
>
> If I change the function like this:
>
> y = 0
> def func():
>      print y
> func()
>
> then no error is thrown and python apparently knows about 'y'.
>
> I don't understand why the error is thrown in the first place.
> Can  somebody explain the rule which is causing the error to
> me?

What you're seeing is a reasonable compromise in design.

Assignments in Python, conceptually, create a new binding.

 >>> x = 5

The name x is created, and bound to an object that represents
five. Any old bindings for x are discarded.

 x = 12
 x = 5

After the second assignment, x is bound to 5.

The mapping from names to values, in a computer language, is
usually called an "environment". Imagine the environment as a
Python dictionary. The environment starts out containing Python's
builtin names and their values, but for the sake of clearer
discussion we'll pretend it starts out empty.

 >>> # environment is {}
 >>> x = 12  
 >>> # environment is {x: <int 12>}
 >>> x = 5
 >>> # environment is {x: <int 5>}
 
The += operator looks like it mutates an object, but (for most
object types) it does not. 'x += 5' is equivalent to 'x = x + 5'
In other words, the value of x is looked up in the current
environment, five is added to it, and then the name x is rebound to
that new object. I'll be rewriting += as a "read+rebinding" in
the rest of this discussion.

Python has lexical scope. That means that the extent of a name is
limited to the lexical "space" in which it is defined.

 >>> # env is {}
 >>> def foo():
 ...   z = 12
 >>> # env is {foo: <function foo>}
 
After the definition of foo is complete, there's no binding for z
in the global environment. That's because z is defined only
inside function foo.

So you see that functions have their own environment. In the
above example, the environement of foo is {z: <int 12>}. A
statement or expression inside a function foo will first look
names in it's own environment.

If the name is not found in the functions environment, is is then
looked up in the enclosing environement.

 >>> x = 5 # env is {x: <int 5>}
 >>> def foo():
 ...   print x
 >>> foo() # env is {x: <int 5>, foo: <function foo>}
 5

An assignment or binding construct in a function changes the
*function's* environment.

 >>> x = 5 # env is {x: <int 5>}
 >>> def foo():
 ...   x = 12 # foo's env is {x: <int 12>}
 ...   print x
 >>> foo() # env is {x: <int 5>, foo: <function foo>}
 12

But there's a trick to it. Python has the following peculiar
behavior:

 >>> x = 5 # env is {x: <int 5>}
 >>> def foo():
 ...   print x # foo's env is {}
 ...   x = 12 # foo's env is {x: <int 12>}
 >>> foo() # env is {x: <int 5>, foo: <function foo>}
 Traceback (most recent call last):
   ...
 UnboundLocalError: local variable 'x' referenced before assignment

The simplified rules for name lookup I gave earlier say that when
executing 'print x' Python ought to look up 'x' in foo's
environment, fail to find it, and then look up 'x' in the
enclosing environment instead.

But Python doesn't do that. If there's an assignment of a name
anywhere in the function, Python will refuse to look up that name
in the enclosing environment, insisting that it must be "local"
to the function.
this. ;)

In the above example, Python "looks ahead" and sees the
assignment to 'x' in foo, and reasons that x must be a local
variable. To rewrite foo's environment, we have to imagine that
there's a special value that x is bound to meaning "undefined
local variable" when foo is first created. Attempting to read the
value from the environment raises an exception.

 >>> x = 5 # env is {x: <int 5>}
 >>> def foo():
 ...   print x # foo's env is {x: <variable undefined>}
 ...   x = 12 # foo's env is {x: <int 12>}
 >>> foo() # env is {x: <int 5>, foo: <function foo>}
 Traceback (most recent call last):
   ...
 UnboundLocalError: local variable 'x' referenced before assignment

When 'print x' is encountered, Python looks up 'x' in foo's
environment, finding <variable undefined>, and so raises an
exception.

Going back to your examples, and adding the model environments:

  >>> y = 0 # env is {y: <int 0>}
  >>> def func():
  ...   # func's env is {y: <variable undefined>}
  ...   y = y + 3
  >>> func()
  Traceback (most recent call last):
    ...
  UnboundLocalError: local variable 'y' referenced before assignment

I rewrite 'y += 3' as 'y = y + 3' to make it clearer that Python
must look up y in func's env before the assignment. The
assignment never takes place because looking up y in func's
environment results in a <variable undefined>, raising an
exception before the assignment happens.

  >>> y = 0 # env is {y: <int 0>}
  >>> def func():
  ...   print y # func's env is {}
  >>> func() # env is {y: <int 0>, func: <function func>}
  0

In the above case, Python attempts to look up y in func's
environment, fails to find it, and so looks it up in the outer
environment, where y is bound to <int 0>.

The reason Python does this peculiar thing is that functions
don't really have their own fully-fledged environements, the way
that modules and classes do. They use an--I presume--simpler,
leaner, more efficient construct. One requirement of this simpler
construct seems to be that a name must be either defined or
undefined inside a function. It can't be defined at one time, and
undefined at another time, as can happen in more full-featured
environments.

-- 
Neil Cerutti


From jjl at pobox.com  Wed Aug  1 15:06:36 2007
From: jjl at pobox.com (John J. Lee)
Date: Wed, 01 Aug 2007 19:06:36 GMT
Subject: Pythonic way for missing dict keys
References: <mailman.938.1184958565.22759.python-list@python.org>
	<pan.2007.07.21.00.20.54.768439@REMOVE.THIS.cybersource.com.au>
	<mailman.954.1184989959.22759.python-list@python.org>
	<Xns99748CC2DB4AAduncanbooth@127.0.0.1>
	<1185041243.323915.161230@x40g2000prg.googlegroups.com>
	<mailman.984.1185101740.22759.python-list@python.org>
	<87lkd0eprj.fsf@pobox.com>
	<Xns997B9706674B8themindstorm@80.91.229.5>
	<mailman.1284.1185625410.22759.python-list@python.org>
Message-ID: <87tzrj5b2b.fsf@pobox.com>

Steve Holden <steve at holdenweb.com> writes:
[...]
> Yup. Anyway there's a trivial translation for uses of apply.
>
>     apply(f, *args, **kw) =>  f(*args, **kw)
[...]

Steve means:

apply(f, args, kw) =>  f(*args, **kw)


John


From beema.shafreen at gmail.com  Thu Aug  2 00:27:27 2007
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Thu, 2 Aug 2007 09:57:27 +0530
Subject: beginner in python
Message-ID: <aa405c1f0708012127j471c9b2dl35b74cda9f595d09@mail.gmail.com>

hi everybody,
   I am beginner in python
 I have to calculate the euclidean distance between the atoms from a pdb
file
i have written the the code and its shows me some error ,
the code:
import re
import string
import math
ab =[]
x_value = []
y_value = []
z_value = []
fh = open("1K5N.pdb",'r')
for atom in fh.readlines():
   a = atom.strip()
   pattern= re.compile('^ATOM.*')
   atom_file= pattern.search(a)
   if  atom_file:
       atom_data = atom_file.group()
       x_coordinate = atom_data[31:38]
       y_coordinate = atom_data[39:46]
       z_coordinate = atom_data[47:54]
       x_value.append(x_coordinate)
       y_value.append(y_coordinate)
       z_value.append(z_coordinate)
for x in range(len(x_value)):
             x_co = float(x_value[x])-float(x_value[x+1])
             y_co = float(y_value[x])-float(y_value[x+1])
             z_co = float(z_value[x])-float(z_value[x+1])
             data = math.sqrt(x_co)*(x_co)+(y_co)*(y_co)+(z_co)*(z_co)
             print data
~
and the error ,message
 File "pdb_fetching.py", line 22, in ?
    x_co = float(x_value[x])-float(x_value[x+1])
IndexError: list index out of range


can you suggest me the mistake i have made



regards
shafreen
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From cjw at sympatico.ca  Wed Aug 15 12:04:26 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Wed, 15 Aug 2007 12:04:26 -0400
Subject: sub-classing the types in the builtin module datetime
Message-ID: <f9v86f$s14$1@sea.gmane.org>

I wish to sub-class (if that's the right word) datetime and to use a 
different signature for the constructor.

The second part has gone smoothly, but it is difficult to access the 
type's methods from the sub-class instance.

I'm beginning to wonder whether it might might be simpler to write my 
own Date class.

Does anyone have any comments please?

Colin W.



From steve at holdenweb.com  Sun Aug 19 20:45:02 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 19 Aug 2007 20:45:02 -0400
Subject: Sorting a list of Unicode strings?
In-Reply-To: <1i338vd.1kisqttkij0d9N%aleax@mac.com>
References: <1187542237.139346.6910@o80g2000hse.googlegroups.com>	<46C87772.2010603@web.de>	<1187543116.941243.200960@r34g2000hsd.googlegroups.com>
	<1i338vd.1kisqttkij0d9N%aleax@mac.com>
Message-ID: <faao65$o18$2@sea.gmane.org>

Alex Martelli wrote:
> oliver at obeattie.com <oliver at obeattie.com> wrote:
>    ...
>>>> Maybe I'm missing something fundamental here, but if I have a list of
>>>> Unicode strings, and I want to sort these alphabetically, then it
>>>> places those that begin with unicode characters at the bottom.
>    ...
>> Anyway, I know _why_ it does this, but I really do need it to sort
>> them correctly based on how humans would look at it.
> 
> Depending on the nationality of those humans, you may need very
> different sorting criteria; indeed, in some countries, different sorting
> criteria apply to different use cases (such as sorting surnames versus
> sorting book titles, etc; sorry, I don't recall specific examples, but
> if you delve on sites about i18n issues you'll find some).
> 
Just one example from my own experience. When sorting names in Scotland 
(and technically in the rest of the UK too in deference to Scotland, 
though this is often ignored) named beginning with "Mc" have to be 
sorted /as though/ they began with "Mac". Since the two prefixes are 
indistinguishable phonetically it would otherwise mean twice as much 
work to look up one of those names.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From hulne000 at planet.nl  Mon Aug  6 16:47:35 2007
From: hulne000 at planet.nl (hulne000 at planet.nl)
Date: Mon, 6 Aug 2007 22:47:35 +0200
Subject: Release of Pmw.1.3
Message-ID: <FB83EDFE3634334EA76600378DC61F69C58A9C@CPEXBE-EML20.kpnsp.local>

Subject: ANNOUNCE: Pmw megawidgets 1.3

        
                   Pmw megawidgets for Tkinter

                          Version 1.3

                  Greg McFarlane <gregm at iname.com>
                    http://pmw.sourceforge.net/
                  Serge Hulne shulne at planet.nl

                            --oOo--

A new release of Pmw is out.  This release makes Pmw compatable with
recent releases of python and Tcl/Tk.

This version of Pmw was tested against python 2.3, 2.4, 2.5 Tcl/Tk 8.4.2 and
Blt 2.4z.  Except for Blt, all tests pass.  Blt seems to be more
flacky than usual, with core dumps occuring in the Graph code.  Since
this is a problem in Blt (not Pmw), the Blt test script has been
removed from the default Pmw test sequence.

Several other bug fixes and improvements were made.  See the change
log for details.


A setup.py script has been added in order to automate the installation of Pmw. 


To download Pmw or for more information, see the home page at
  http://pmw.sourceforge.net/

If you have any comments, enhancements or new contributions, please
contact Serge (shulne at planet.nl) or me (gregm at iname.com) .

=====================================================================

What is Pmw?

    Pmw is a toolkit for building high-level compound widgets, or
    megawidgets, constructed using other widgets as component parts. 
    It promotes consistent look and feel within and between graphical
    applications, is highly configurable to your needs and is easy to
    use.  It uses the Tkinter python library.

    Pmw consists of:

        - A few base classes, providing a foundation for building
          megawidgets.

        - A library of flexible and extensible megawidgets built on
          the base classes, such as buttonboxes, notebooks,  
          comboboxes, selection widgets, paned widgets, scrolled
          widgets and dialog windows.

        - A lazy importer/dynamic loader which is automatically
          invoked when Pmw is first imported.  This gives unified
          access to all Pmw classes and functions through the Pmw.
          prefix.  It also speeds up module loading time by only
          importing Pmw sub-modules when needed.

        - Complete reference documentation, covering all classes and
          functions including all megawidgets and their options,
          methods and components.  Helpful tutorial material is also
          available.

        - A test framework and tests for Pmw megawidgets.

        - A slick demonstration of the megawidgets.

        - An interface to the BLT busy, graph and vector commands.

    The interface to Pmw megawidgets is similar to basic Tk widgets,
    so it is easy for developers to include both megawidgets and basic
    Tk widgets in their graphical applications.  In addition, Pmw
    megawidgets may themselves be extended, using either inheritance
    or composition.

    The use of the Pmw megawidgets replaces common widget combinations
    with higher level abstractions.  This simplifies code, making it
    more readable and maintainable.  The ability to extend Pmw
    megawidgets enables developers to create new megawidgets based on
    previous work.






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From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug 29 09:16:54 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 29 Aug 2007 15:16:54 +0200
Subject: Code design problem
In-Reply-To: <1188389375.238847.298320@w3g2000hsg.googlegroups.com>
References: <1188389375.238847.298320@w3g2000hsg.googlegroups.com>
Message-ID: <46d571c1$0$412$426a74cc@news.free.fr>

Marco Nawijn a ?crit :
> Hello,
> 
> I have a hard time figuring out an elegant and efficient design for
> the following problem.
> 
> I am working on automation of structural design problems. In the
> majority of cases, this boils down to executing programs in batch in
> one or more loops. The scripts to control the execution differ from
> fortran to bash to python and so on. Most of them are ad hoc and what
> I call 'throw away scripts'. In order to improve the situation I would
> like to develop a Python module that supports the execution of
> external programs. Ideally I would like to make running locally or
> remote trivial for the users of the module. As an example, I would
> like the following (pseudo)-code to work:
> 
> app = Application('patran')                        # Run on local
> machine
> app.start(args)
> 
> 
> app = Application('patran', host='myhost')   # Run on remote machine
> app.start(args)
> 
> The problem I face is that the implementation of the application class
> is completely
> different for the local and remote case. The local case is a
> straightforward implemenation using the subprocess module, the remote
> case is a CORBA implementation. Somehow I would like to switch from
> implementation class at runtime depending on whether or not the host
> parameter is specified or not.

The solution is quite straightforward, and is known as the "factory" 
design pattern.

> The Application, local implementation and remote implementation all
> have the same interface, so a possibility might be something like the
> following:
> 
> class Interface(object):
>      .....
>      def start(self): pass
>      def stop(self): pass

What's the use of this class ? In Python, inheritance is for 
implementation only.

> class LocalImplementation(Interface):
>        .....
> 
> class GlobalImplementation(CorbaGlobalImplementation, Interface):
>        .....
> 
> 
> class Application(Interface):
> 
>       def __init__(self, program, host=None):
>             ....
>             if host:
>                    self.__impl = LocalImplementation(program)
>             else:
>                    self.__impl = GlobalImplementation(program, host)
> 
>       #  Forward all methods to the implementation class
>       def start(self):
>           self.__impl.start()
> 
>       def stop(self):
>           self.__impl.stop()
> 

My my my... How to uselessly overcomplexify things...

class LocalApp(object):
   def __init__(self, program):
     # code here
   def start(self):
     # code here
   def stop(self):
     # code here

class RemoteApp(object):
   def __init__(self, program, host):
     # code here
   def start(self):
     # code here
   def stop(self):
     # code here

def Application(program, host=None):
   if host is None:
     return LocalApp(program)
   else:
     return RemoteApp(program, host)



> To me forwarding each call in the Application class looks a little bit
> redundant 

Indeed !-)

> and I would like to get rid of it. 

cf above. But in case you need to do proper delegation in Python, the 
magic words are "__getattr__" and "__setattr__". Here's a very basic 
example of using __getattr__ - using __setattr__ is a bit more tricky, 
but you'll find all relevant documentation in the FineManual(tm):

class Wrapper(object):
   def __init__(self, obj):
     self.__obj = obj

   def __getattr__(self, name):
     return getattr(self.__obj, name)

> Does anyone have any
> comments or suggestions? Can metaclass programming come to rescue?

May I suggest that you first learn Python bases before going into 
complex things ?

And FWIW, googling for "KISS" might help too !-)

HTH


From dave at waveform.plus.com  Thu Aug  2 10:53:16 2007
From: dave at waveform.plus.com (Dave Hughes)
Date: 02 Aug 2007 14:53:16 GMT
Subject: Determining if file is valid image file
References: <1186064098.587590.91210@g4g2000hsf.googlegroups.com>
Message-ID: <46b1efdc$0$1603$ed2619ec@ptn-nntp-reader02.plus.net>

Andr? wrote:

> Other than installing PIL, is there a "simple" way using Python only
> to determine if a file is a valid image file?
> 
> I'd be happy if I could at least identify valid images files for gif,
> jpeg and png.   Pointers to existing modules or examples would be
> appreciated.
> 
> The reason why I'd prefer not using PIL is that I'd like to bundle
> such a function/module in my app.

Any reason you don't want to bundle PIL? The license looks like a
fairly standard BSD style license to me which I don't think precludes
you from bundling it (other than having to reproduce the (very small)
license text in any documentation).

Otherwise, it depends on exactly what you mean by "valid". You could do
something as simple as check the "magic" number in the header of the
file. Most image formats have something like this:

* PNG: byte sequence 89 50 4E 47 0D 0A 1A 0A
* GIF: "GIF89a" or "GIF87a"
* JPG: byte sequence FF D8 FF E0 nn nn 4A 46  49 46 00 (for JFIF)

Naturally, this won't guarantee the rest of the file is valid, but
might be sufficient for your purposes (it's one of the methods the
"file" command uses for recognizing file types).


HTH,

Dave.
-- 



From rdm at rcblue.com  Wed Aug 22 04:22:39 2007
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 22 Aug 2007 01:22:39 -0700
Subject: IDE for Python
In-Reply-To: <505f13c0708210655g36ce7cf1m2cb089ce974983e1@mail.gmail.com
 >
References: <mailman.55.1187690455.32294.python-list@python.org>
	<1187698999.545439.322600@k79g2000hse.googlegroups.com>
	<505f13c0708210655g36ce7cf1m2cb089ce974983e1@mail.gmail.com>
Message-ID: <20070822082418.B1AF01E4007@bag.python.org>

At 06:55 AM 8/21/2007, limodou wrote:
>On 8/21/07, king kikapu <aboudouvas at panafonet.gr> wrote:
> > On Aug 21, 12:00 pm, Joel Andres Granados <joel.grana... at gmail.com>
> > wrote:
> > > Hello list:
> > >
> > > I have tried various times to use an IDE for python put have always been
> > > disapointed.
> >
> >
> > I have also tried a lot of them (IDEs) in the last year. I was finally
> > happy with Eclipse/Pydev but i was always wanted a more "true" IDE for
> > Python.
> > I think i found it in Eric4 http://www.die-offenbachs.de/eric/index.html
> > You can download from here 
> http://www.riverbankcomputing.co.uk/pyqt/download.php
> > (binary installer for Windows that contains Eric and PyQt)
> > and have a look at it!
> >
>Maybe someone can try UliPad, I just release 3.7 version a few days before.

I'm a longtime, very satisfied Ulipad user, and heartily recommend 
Ulipad. <http://code.google.com/p/ulipad/>.

Limodou, although sometimes busy with other projects, is very 
responsive to requests for help with Ulilpad, and very open to 
suggestions for new features. He's Chinese, in Beijing, so is on 
Beijing time, but during his day he seems to check his mail often. 
(Gmail users can see when he's using his Gmail account.) If you do 
become a Ulipad user, I strongly suggest you subscribe to the Ulipad 
list at Google Groups, <http://groups.google.com/group/ulipad>.

Dick Moores
XP, Python 2.5, editor is Ulipad



>--
>I like python!
>UliPad <<The Python Editor>>: http://code.google.com/p/ulipad/
>My Blog: http://www.donews.net/limodou
>--
>http://mail.python.org/mailman/listinfo/python-list

======================================
                       Bagdad Weather
<http://weather.yahoo.com/forecast/IZXX0008_f.html> 



From gagsl-py2 at yahoo.com.ar  Thu Aug  2 00:00:31 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 02 Aug 2007 01:00:31 -0300
Subject: encode() question
References: <1185900791.595830.21290@d55g2000hsg.googlegroups.com>
	<mailman.1376.1185902350.22759.python-list@python.org>
	<1185903926.955444.43620@22g2000hsm.googlegroups.com>
	<5h9hjsF3j641tU3@mid.uni-berlin.de>
Message-ID: <op.tweyq5iax6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Tue, 31 Jul 2007 16:41:48 -0300, Marc 'BlackJack' Rintsch  
<bj_666 at gmx.net> escribi?:

> On Tue, 31 Jul 2007 10:45:26 -0700, 7stud wrote:
>> On Jul 31, 11:18 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
>> wrote:
>>> str.decode and unicode.encode should NOT exist, or at least issue a
>>> warning (IMHO).
>> Yes, that sounds like a good idea.
>
> It sounds like horrible idea as those are the ones that are really  
> needed.

Ouch! caffeine levels below critical threshold, I think.

-- 
Gabriel Genellina



From deets at nospam.web.de  Tue Aug 14 09:17:14 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 14 Aug 2007 15:17:14 +0200
Subject: LEGB rule, totally confused ...
References: <mailman.1959.1187094797.22759.python-list@python.org>
Message-ID: <5idoaqF3osu6rU2@mid.uni-berlin.de>

stef mientki wrote:

> hello,
> 
> I've thought many times I finally understood the import / namespace rules,
> but again I'm totally lost :-(
> 
> This is my library file
> 
>     # Module lib_test.py
> 
>     X = 1
> 
>     def Init():
>         global X
>         X = 3
>         print 'Init', X
> 
>     def Run ():
>         print X                 <=== UnboundLocalError: local variable
>     'X' referenced before assignment
>         X = X + 1
>         print ' Run', X
> 
> 
> 
> And this my main program in another file:
> 
>     import lib_test
>     lib_test.Init()
>     print lib_test.X
> 
>     lib_test.Run()
>     print lib_test.X
> 
> Why do I get the error ?
> Printing isn't assigning anything or am I missing something.
> Now if I remove "X = X + 1" I don't get an error ???
> Is this a problem of the traceback procedure or the IDE,
> or is Python not completely an interpreter, that reads line by line ???
> 
> Please explain this to me.

This are the scoping-rules of python. A variable name on the left side of an
name-binding/assignment operator (including augmented assignments, vulgo:
+= and brothers) will make the variable name a function-local.

So 

x = 10
def foo():
   print x
   x = 100

makes x a local variable to foo, which of course can't be accessed in 

print x

Diez


From raims at dot.com  Tue Aug 14 12:27:37 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Tue, 14 Aug 2007 18:27:37 +0200
Subject: Simple python iteration question
References: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
Message-ID: <1i2ulxb.179bf9ppsie5uN%raims@dot.com>

Bryan <b at bcc.com> wrote:
> How do I do this?

for i, item in enumerate(l):
    print i, item


-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From kyosohma at gmail.com  Wed Aug  1 08:58:02 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 01 Aug 2007 12:58:02 -0000
Subject: Strange problems with subprocess
In-Reply-To: <f8pc74$s2p$1@nnrp-beta.newsland.it>
References: <f8pc74$s2p$1@nnrp-beta.newsland.it>
Message-ID: <1185973082.899736.247300@i13g2000prf.googlegroups.com>

On Aug 1, 2:20 am, Michele Petrazzo <michele.petra... at TOGLIunipex.it>
wrote:
> Hi all. I have a simple "ping tester" program that, every 1 minute
> (execute by linux crontab), create, with subprocess, a
> "ping -c 1 my_addrs". All work, but sometime (about 1/2 times at a day),
> I receive this error message:
>
> File "/exports/srv-wipex/net_test/ping_tester.py", line 88, in pyPing
>    cmd_p = Popen(cmd, stdout=PIPE, stderr=PIPE)
> File "subprocess.py", line 543, in __init__
>    errread, errwrite)
> File "subprocess.py", line 970, in _execute_child
>    data = os.read(errpipe_read, 1048576) # Exceptions limited to 1 MB
>
> What can be that raise this?
>
> Python 2.4 in deb etch
>
> Thanks,
> Michele

This doesn't look like a complete traceback. It doesn't give what the
error was.

Mike



From jstroud at mbi.ucla.edu  Thu Aug  2 21:37:00 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 02 Aug 2007 18:37:00 -0700
Subject: __call__ considered harmful or indispensable?
In-Reply-To: <f8tvtc$jh9$1@zinnia.noc.ucla.edu>
References: <mailman.1527.1186079415.22759.python-list@python.org>
	<f8tvtc$jh9$1@zinnia.noc.ucla.edu>
Message-ID: <f8u0rs$k2f$1@zinnia.noc.ucla.edu>

James Stroud wrote:
> import functools
> class enclosable(object):
>   def __init__(self, func):
>     self.func = func
>   def __call__(self, *args, **kwargs):
>     return functools.partial(self.func, *args, **kwargs)
> 
> For example:
> 
> @enclosable
> def do_something_with(a, b):
>   [etc]


On second thought:

def enclosable(func):
   def _f(*args, **kwargs):
     return functools.partial(func, *args, **kwargs)
   return _f

I guess __call__ is not necessary for this decorator after all.

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From aleax at mac.com  Fri Aug 31 11:56:19 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 31 Aug 2007 08:56:19 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<7xwsvcc9yz.fsf@ruckus.brouhaha.com>
Message-ID: <1i3p8lm.19738kn1q0gkouN%aleax@mac.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:
   ...
> Hi Alex, I'm a little confused: does Production Systems mean stuff
> like the Google search engine, which (as you described further up in
> your message) achieves its reliability at least partly by massive
> redundancy and failover when something breaks?

The infrastructure supporting that engine (and other things), yes.

>  In that case why is it
> so important that the software be highly reliable?  Is a software

Think "common-mode failures": if a program has a bug, so do all
identical copies of that program.  Redundancy works for cheap hardware
because the latter's "unreliability" is essentially free of common-mode
failures (when properly deployed): it wouldn't work against a design
mistake in the hardware units.  Think of the famous Pentium division
bug: no matter how many redundant but identical such buggy CPUs you
place in parallel to compute divisions, in the error cases they'll all
produce the same wrong results.  Software bugs generally work (or,
rather, fail to work;-) similarly to hardware design bugs.

There are (for both hw and sw) also classes of mistakes that don't quite
behave that way -- "occasional glitches" that are not necessarily
repeatable and are heavily state-dependent ("race conditions" in buggy
multitasking SW, for example; and many more examples for HW, where flaky
behavior may be triggered by, say, temperature situations).  Here, from
a systems viewpoint, you might have a system that _usually_ says that
10/2 is 5, but once in a while says it's 4 instead (as opposed to the
"Pentium division bug" case where it would always say 4) -- this is much
more likely to be caused by flaky HW, but might possibly be caused by
the SW running on it (or the microcode in between -- not that it makes
much of a difference one way or another from a systems viewpoint).

Catching such issues can, again, benefit from redundancy (and
monitoring, "watchdog" systems, health and sanity checks running in the
background, &c).  "Quis custodiet custodes" is an interesting problem
here, since bugs or flakiness in the monitoring/watchdog infrastructure
have the potential to do substantial global harm; one approach is to
invest in giving that infrastructure an order of magnitude more
reliability than the systems it's overseeing (for example by using more
massive and *simple* redundancy, and extremely straightforward
architectures).  There's ample literature in the matter, but it
absolutely needs a *systems* approach: focusing just on the HW, just on
the SW, or just on the microcode in-between;-), just can't help much.

> some good hits they should display) but the server is never actually
> down, can you still claim 100% uptime?

I've claimed nothing (since all such measurements and methodologies
would no doubt be considered confidential unless and until cleared for
publication -- this has been done for a few whitepapers about some
aspects of Google's systems, but never to the best of my knowledge for
the "metasystem" as a whole), but rather pointed to
<http://uptime.pingdom.com/site/month_summary/site_name/www.google.com>,
a publically available site which does publish its methodology (at
<http://uptime.pingdom.com/general/methodology>); summarizing, as they
have no way to check that the results are "right" for the many sites
they keep an eye on, they rely on the HTTP result codes (as well as
validity of HTTP headers returned, and of course whether the site does
return a response at all).

> problem.  Of course then there's a second level system to manage the
> restarts that has to be very reliable, but it doesn't have to deal
> with much weird concocted input the way that a public-facing internet
> application has to.

Indeed, Production Systems' software does *not* "have to deal" with
input from the general public -- it's infrastructure, not user-facing
applications (except in as much as the "users" are Google engineers or
operators, say).  IOW, it's *exactly* the code that "has to be very
reliable" (nice to see that we agree on this;-), and therefore, if as
you then said "Russ's point stands", would NOT be in Python -- but it
is. So, I disagree about the "standing" status of his so-called "point".
 
> Therefore I think Russ's point stands, that we're talking about a
> different sort of reliability in these highly redundant systems, than
> in the systems Russ is describing.

Russ specifically mentioned *mission-critical applications* as being
outside of Python's possibilities; yet search IS mission critical to
Google.  Yes, reliability is obtained via a "systems approach",
considering HW, microcode, SW, and other issues yet such as power
supplies, cooling units, network cables, etc, not as a single opaque big
box but as an articulated, extremely complex and large system that needs
testing, monitoring, watchdogging, etc, at many levels -- there is no
other real way to make systems reliable (you can't do it by just looking
at components in isolation).  Note that this does have costs and
therefore it needs to be deployed selectively, and the whole panoply may
chosen to be arrayed only for what an organization considers to be its
truly mission critical applications -- Google's "pillars" used to be
search and ads, but has more recently been officially declared to now be
"Search, Ads and Apps" (cfr
<http://searchengineland.com/070511-092730.php> and links therefrom for
some discussion about this), which may have implications... but Python
remains at the core of many aspects of our reliability strategy.


Alex


From aleax at mac.com  Wed Aug  1 01:14:21 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 31 Jul 2007 22:14:21 -0700
Subject: Comparing Dictionaries
References: <mailman.1209.1185487266.22759.python-list@python.org>
	<1185611025.943782.162330@w3g2000hsg.googlegroups.com>
	<mailman.1349.1185823856.22759.python-list@python.org>
Message-ID: <1i24yjr.toc9xw10ra73aN%aleax@mac.com>

Kenneth Love <klove at tax.ok.gov> wrote:
   ...
> Python in a Nutshell (2nd ed.)
   ...
> I am a slow reader.  So, if Doctests are mentioned in any of the above,
> I haven't encountered it yet.

Yep, I cover doctest in the chapter on testing, debugging, profiling and
optimizing.


Alex


From bj_666 at gmx.net  Fri Aug 10 06:33:17 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 Aug 2007 10:33:17 GMT
Subject: Question about properties.
References: <1186741289.074717.174370@e16g2000pri.googlegroups.com>
Message-ID: <5i2t7dF3kqc46U3@mid.uni-berlin.de>

On Fri, 10 Aug 2007 03:21:29 -0700, king kikapu wrote:

> Hi,
> 
> i read in a book the following code snippet that is dealing with
> properties:
> 
> class ProtectAndHideX(object):
>     def __init__(self, x):
>         assert isinstance(x, int), '"x" must be an integer!"'
>         self.__x = ~x
> 
>     def get_x(self):
>         return ~self.__x
> 
>     x = property(get_x)
> 
> 
> Can anyone please help me understand what the symbol "~" does here ??

This has nothing to do with properties.  For integer objects ``~`` is the
bitwise negation or invertion operator.

Ciao,
	Marc 'BlackJack' Rintsch


From gagsl-py2 at yahoo.com.ar  Tue Aug 21 23:30:21 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 21 Aug 2007 20:30:21 -0700
Subject: urllib2.urlopen(url) pulling something other than HTML
In-Reply-To: <87ejhwr2mi.fsf@pobox.com>
References: <1187635452.841155.88720@a39g2000hsc.googlegroups.com>
	<1187641080.516885.122350@g4g2000hsf.googlegroups.com>
	<87ejhwr2mi.fsf@pobox.com>
Message-ID: <1187753421.798422.9570@q3g2000prf.googlegroups.com>

On 21 ago, 18:36, j... at pobox.com (John J. Lee) wrote:
> Gabriel Genellina <gagsl-... at yahoo.com.ar> writes:
>
> [...]> Don't even try to understand it - it's a mess. Use the HTMLParser
> > module instead.
>
> [...]
>
> Module sgmllib (and therefore module htmllib also) is more tolerant of
> bad HTML than module HTMLParser.

I had the impression it was the opposite; anyway, neither of them can
handle really bad html.
I just don't *like* htmllib.HTMLParser - but that's only a matter of
taste.

--
Gabriel Genellina



From orsenthil at gmail.com  Fri Aug 24 13:32:34 2007
From: orsenthil at gmail.com (O.R.Senthil Kumaran)
Date: Fri, 24 Aug 2007 23:02:34 +0530
Subject: online doc bug
In-Reply-To: <1187935972.181274.158260@r23g2000prd.googlegroups.com>
References: <1187935972.181274.158260@r23g2000prd.googlegroups.com>
Message-ID: <20070824173234.GA4035@gmail.com>

> hyperlink "site module documentation" in   Section 4.1  on page
> http://docs.python.org/inst/search-path.html  leads to a nonexistent
> page.

Thank you. Submitted the report and patch at:
http://bugs.python.org/issue1012

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From trentm at activestate.com  Fri Aug 10 14:40:40 2007
From: trentm at activestate.com (Trent Mick)
Date: Fri, 10 Aug 2007 11:40:40 -0700
Subject: Puzzled by "is"
In-Reply-To: <20070810175735.B469C1E400A@bag.python.org>
References: <20070809194105.39BD11E400A@bag.python.org>	<f9frbl$dps$1@sea.gmane.org>	<mailman.1814.1186692638.22759.python-list@python.org>	<87zm1042f0.fsf@benfinney.id.au>
	<20070810175735.B469C1E400A@bag.python.org>
Message-ID: <46BCB128.4040700@activestate.com>

Dick Moores wrote:
> At 06:13 PM 8/9/2007, Ben Finney wrote:
>> It's important to also realise that the language is *deliberately*
>> non-committal on whether any given value will have this behaviour;
>> that is, it's entirely left to the language implementation which
>> optimisation trade-offs to make, and the language user (that's you and
>> I) should *not* expect any particular behaviour to hold between
>> different implementations.
> 
> I'm not clear on the meaning of "implementations" 
> here.  Would 2.5 for Windows, Mac, Linux all be 
> different implementations? Would Iron Python be another? ActivePython?

(Note that I'm jumping into this without having read the thread, so 
apologies if I didn't grasp the question in its proper context.)

Separate Python "implementations" generally refers to a separate source 
code base for that Python build. According to that definition, current 
examples of Python implementations are: CPython (from python.org, 
C-based), Jython (Java-based), Stackless Python (I'm not that familiar 
to how much of the CPython source code, if any, Stackless borrows), 
IronPython (.NET/C#-based), possibly PyPy (Python-based, I'm not that 
familiar with it). Also eventually interesting might be the recently 
announced IronMonkey (http://wiki.mozilla.org/Tamarin:IronMonkey).

Windows, Mac, Linux, etc. installations/builds/installers of a 
particular implementation would be different platform *builds* (my 
language).

ActivePython is a separate (from python.org's) *distribution* of CPython 
-- i.e. the sample implementation as CPython (same source code). This is 
similar, in some respects, to SuSE, Debian, RedHat, Ubuntu, etc. being 
different distributions of Linux.


Trent

-- 
Trent Mick
trentm at activestate.com


From arkanes at gmail.com  Wed Aug  1 12:28:48 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 1 Aug 2007 11:28:48 -0500
Subject: Assertion in list comprehension
In-Reply-To: <1185982643.001546.138180@e16g2000pri.googlegroups.com>
References: <1185982643.001546.138180@e16g2000pri.googlegroups.com>
Message-ID: <4866bea60708010928n3cd803cdp8eefe136eff09e30@mail.gmail.com>

On 8/1/07, beginner <zyzhu2000 at gmail.com> wrote:
> Hi,
>
> Does anyone know how to put an assertion in list comprehension? I have
> the following list comprehension, but I want to use an assertion to
> check the contents of rec_stdl. I ended up using another loop which
> essentially duplicates the functions of list comprehension. It just
> look like a waste of coding and computer time to me.
>
> I just wish I could put the assertions into list comprehensions.
>
>         x=[(rec_stdl[0].st/10000.0,
>             rec_stdl[0].cl,
>             rec_stdl[0].bb,
>             rec_stdl[0].bo,
>             rec_stdl[1].bb,
>             rec_stdl[1].bo,
>             rec_stdl[0].ex
>            )
>            for rec_stdl in rec_by_ex if len(rec_stdl)==2
>         ]
>
>         #duplicated loop
>         if __debug__:
>             for rec_stdl in rec_by_ex:
>                 l=len(rec_stdl)
>                 assert(l<=2 and l>0)
>                 if l==2:
>                     assert(rec_stdl[0].c=="C" and rec_stdl[1].c=="P")
>                     assert(rec_stdl[0].ex==rec_stdl[1].ex)
>                     assert(rec_stdl[0].st==rec_stdl[1].st)
>                     assert(rec_stdl[0].cp==rec_stdl[1].cp)

First: All your asserts are wrong. Assert is a statement, not a
function. These specific ones will behave as expected, but it's easy
to accidentally write ones that always pass this way.

Secondly: This is a waste of code, because if __debug__ is not defined
asserts will be skipped by the compiler. You could use the same loop
block for both branches.

Thirdly: This sort of testing is precisely what unit tests and/or
doctests are for.


From michael at jedimindworks.com  Thu Aug  9 06:39:15 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Thu, 9 Aug 2007 03:39:15 -0700
Subject: Launching App
In-Reply-To: <00e301c7da6c$51ee3fc0$f5cabf40$@rawlins@thinkbluemedia.co.uk>
References: <00e301c7da6c$51ee3fc0$f5cabf40$@rawlins@thinkbluemedia.co.uk>
Message-ID: <C1B1A8CC-1C8D-4546-81B7-9176F0C04257@jedimindworks.com>


On Aug 9, 2007, at 3:01 AM, Robert Rawlins - Think Blue wrote:
I?m looking for the best method to launch my python app when my Linux  
system boots up. At the moment I just have an entry like this in my  
rc.local file:

CD /myfolder/anotherfolder

./myapp.py


Is this the best way to do this? Or is there a better way? I feel  
like a bit of a dummy asking this question, I just wanted to ensure  
the best method.

A better way is to use the SYSV init system: create a start/stop/ 
status script for your app in /etc/init.d (use existing scripts in  
that directory for examples of what you can do). On Debian, you can  
then use update-rc.d to create the appropriate symlinks.

hope this helps,
Michael

---
Debugging is twice as hard as writing the code in the first place.   
Therefore, if you write the code as cleverly as possible, you are, by  
definition, not smart enough to debug it. --Brian W. Kernighan

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From nikola at komponenta.com  Tue Aug 21 03:58:36 2007
From: nikola at komponenta.com (Knikola)
Date: Tue, 21 Aug 2007 09:58:36 +0200
Subject: Ten years on....
In-Reply-To: <1182544146.098432.113660@m37g2000prh.googlegroups.com>
References: <1182544146.098432.113660@m37g2000prh.googlegroups.com>
Message-ID: <fae5vc$eis$1@ss408.t-com.hr>

Clarence wrote:
> I've been waiting for a month to post this (yesterday), and then I
> missed it. Oh, well, it's funny and deserves to be republished on its
> ten-year-and-one-day anniversary.
> 
> BTW, a member of the ANSI C committee once told me that the only thing
> rand is used for in C code is to decide whether to pick up the axe or
> throw the dwarf, and if that's true I guess "the typical libc rand" is
> adequate for all but the most fanatic of gamers .
> 
> -- Tim Peters, 21 June 1997.
> 
> "Belated-but-still-sincerely-admiring-of-Tim-Peters"-ly yrs,
> Clarence
> 
:)


From bignose+hates-spam at benfinney.id.au  Thu Aug 30 19:41:01 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 31 Aug 2007 09:41:01 +1000
Subject: strings (dollar.cents) into floats
References: <mailman.140.1188483282.28954.python-list@python.org>
Message-ID: <877incd20i.fsf@benfinney.id.au>

luca bertini <luca.bertini at email.it> writes:

> i have strings which look like money values (ie 34.45)
> is there a way to convert them into float variables?

You most likely do *not* want floating-point numbers for currency,
since they rely on the operating system's binary floating point
support which cannot accurately represent decimal fractions.

    >>> float("34.45")
    34.450000000000003


Use the arbitrary-precision decimal.Decimal type instead.

    >>> from decimal import Decimal
    >>> Decimal("34.45")
    Decimal("34.45")

They support the full range of arithmetic operations, without
cumulative precision errors that floats are prone to.

-- 
 \          "As the evening sky faded from a salmon color to a sort of |
  `\   flint gray, I thought back to the salmon I caught that morning, |
_o__) and how gray he was, and how I named him Flint."  -- Jack Handey |
Ben Finney


From horpner at yahoo.com  Fri Aug 17 14:38:08 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 17 Aug 2007 18:38:08 GMT
Subject: help on object  programing
References: <1187370429.041002.205500@d55g2000hsg.googlegroups.com>
Message-ID: <slrnfcbqf2.1jc.horpner@FIAD06.norwich.edu>

On 2007-08-17, yadin <conra2004 at yahoo.com> wrote:
> class big(self):
>
>     x = 32
>     list = []
>     def inside (self):
>
>         class small(self): # a new class defined inside the first
>
>             y = 348
>             list.append(y) # send the value to first list
>             list.append(x)
>
> print list
>
> how can i define my variables so that there are valid outside
> the class???

Be sure to read and try the code in the sections of the Python
tutorial that discuss classes and the objects they create.

In my opinion the classes section of the official tutorial is
unfortunately the least tutorial part of the tutorial. But it
won't steer you wrong.

-- 
Neil Cerutti


From jmtulloss at gmail.com  Fri Aug 10 06:01:51 2007
From: jmtulloss at gmail.com (Justin T.)
Date: Fri, 10 Aug 2007 10:01:51 -0000
Subject: The Future of Python Threading
Message-ID: <1186740111.918048.77920@d30g2000prg.googlegroups.com>

Hello,

While I don't pretend to be an authority on the subject, a few days of
research has lead me to believe that a discussion needs to be started
(or continued) on the state and direction of multi-threading python.

Python is not multi-threading friendly. Any code that deals with the
python interpreter must hold the global interpreter lock (GIL). This
has the effect of serializing (to a certain extent) all python
specific operations. IE, any thread that is written purely in python
will not release the GIL except at particular (and possibly non-
optimal) times. Currently that's the rather arbitrary quantum of 100
bytecode instructions. Since the ability of the OS to schedule python
threads is based on when its possible to run that thread (according to
the lock), python threads do not benefit from a good scheduler in the
same manner that real OS threads do, even though python threads are
supposed to be a thin wrapper around real OS threads[1].

The detrimental effects of the GIL have been discussed several times
and nobody has ever done anything about it. This is because the GIL
isn't really that bad right now. The GIL isn't held that much, and
pthreads spawned by python-C interations (Ie, those that reside in
extensions) can do all their processing concurrently as long as they
aren't dealing with python data. What this means is that python
multithreading isn't really broken as long as python is thought of as
a convenient way of manipulating C. After all, 100 bytecode
instructions go by pretty quickly, so the GIL isn't really THAT
invasive.

Python, however, is much better than a convenient method of
manipulating C. Python provides a simple language  which can be
implemented in any way, so long as promised behaviors continue. We
should take advantage of that.

The truth is that the future (and present reality) of almost every
form of computing is multi-core, and there currently is no effective
way of dealing with concurrency. We still worry about setting up
threads, synchronization of message queues, synchronization of shared
memory regions, dealing with asynchronous behaviors, and most
importantly, how threaded an application should be. All of this is
possible to do manually in C, but its hardly optimal. For instance, at
compile time you have no idea if your library is going to be running
on a machine with 1 processor or 100. Knowing that makes a huge
difference in architecture as 200 threads might run fine on the 100
core machine where it might thrash the single processor to death.
Thread pools help, but they need to be set up and initialized. There
are very few good thread pool implementations that are meant for
generic use.

It is my feeling that there is no better way of dealing with dynamic
threading than to use a dynamic language. Stackless python has proven
that clever manipulation of the stack can dramatically improve
concurrent performance in a single thread. Stackless revolves around
tasklets, which are a nearly universal concept.

For those who don't follow experimental python implementations,
stackless essentially provides an integrated scheduler for "green
threads" (tasklets), or extremely lightweight snippets of code that
can be run concurrently. It even provides a nice way of messaging
between the tasklets.

When you think about it, lots of object oriented code can be organized
as tasklets. After all, encapsulation provides an environment where
side effects of running functions can be minimized, and is thus
somewhat easily parallelized (with respect to other objects).
Functional programming is, of course, ideal, but its hardly the trendy
thing these days. Maybe that will change when people realize how much
easier it is to test and parallelize.

What these seemingly unrelated thoughts come down to is a perfect
opportunity to become THE next generation language. It is already far
more advanced than almost every other language out there. By
integrating stackless into an architecture where tasklets can be
divided over several parallelizable threads, it will be able to
capitalize on performance gains that will have people using python
just for its performance, rather than that being the excuse not to use
it.

The nice thing is that this requires a fairly doable amount of work.
First, stackless should be integrated into the core. Then there should
be an effort to remove the reliance on the GIL for python threading.
After that, advanced features like moving tasklets amongst threads
should be explored. I can imagine a world where a single python web
application is able to redistribute its millions of requests amongst
thousands of threads without the developer ever being aware that the
application would eventually scale. An efficient and natively multi-
threaded implementation of python will be invaluable as cores continue
to multiply like rabbits.

There has been much discussion on this in the past [2]. Those
discussions, I feel, were premature. Now that stackless is mature (and
continuation free!), Py3k is in full swing, and parallel programming
has been fully realized as THE next big problem for computer science,
the time is ripe for discussing how we will approach multi-threading
in the future.

Justin

[1] I haven't actually looked at the GIL code. It's possible that it
creates a bunch of wait queues for each nice level that a python
thread is running at and just wakes up the higher priority threads
first, thus maintaining the nice values determined by the scheduler,
or something. I highly doubt it. I bet every python thread gets an
equal chance of getting that lock despite whatever patterns the
scheduler may have noticed.

[2]
http://groups.google.com/group/comp.lang.python/browse_thread/thread/7d16083cf34a706f/858e64a2a6a5d976?q=stackless%2C+thread+paradigm&lnk=ol&
http://www.stackless.com/pipermail/stackless/2003-June/000742.html
... More that I lost, just search this group.



From horpner at yahoo.com  Mon Aug  6 13:58:16 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 06 Aug 2007 17:58:16 GMT
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
Message-ID: <slrnfbeofu.20s.horpner@FIAD06.norwich.edu>

On 2007-08-06, Lee Fleming <countblabula at yahoo.com> wrote:
> On Aug 6, 6:25 am, Neil Cerutti <horp... at yahoo.com> wrote:
> Because when the function is called,  the line
>
>
>>     if y is None: y = []
>
>
> is executed, binding a brand new empty list to y. This
> "rebinding" happens every time the function is called, unless
> you provide an argument for y that is not None.
>
> Thanks for the prompt replies. But I am still confused. This is
> what confuses me.... The first time you call the function, say
> with f(23), after the function ends, y no longer equals None.
> Therefore, calling f again, this time like this f(24), should
> make y equal [23,24], because the 'if y == None' test fails, or
> at least I think it fails, because y.append(x) added something
> that was not equal to None during the previous call.
>
> Please help me!

Let's back up a little, and examine a model of the sequence of events.

>>> def f(x, y=None):
...  if y is None:
...    y = []
...  y.append(x)
...  return y
>>> f(2, f(1))
[1, 2]
>>> f(0)
[0]

First, Python reads and executes the function definition. This is
the only time that the default argument expressions of f are
evaluated. None is evaluated, resulting in None, and this is
stored somewhere conveniently inside the function representing f
(see f.func_defaults, for example).

Next, Python evaluates the function call "f(2, f(1))". To do
this, it must first evaluate the function call's arguments. 2
evaluates to 2 (that was easy!).

Next, the expression "f(1)" is evaluated. The name x is bound to
1, and, since y's positional argument was not provided, the name
y is bound to the previously stored default argument.

Now the statements in f are executed. The if statement checks to
see if y is None. It is, so y is rebound to a new empty list
object ("y = []"). Then, the object bound to x (1) is appended to
the list bound to y, and finally that list is returned. It
becomes the second argument of the "outer" call of f.

For this call to f, x is bound to 2, and y is bound to the list
object returned by the previous call to f. Since y is not None
this time, the function simply appends 2 to [1] and returns the
resultant list: [1, 2].

Finally, "f(0)" is evaluated. This calls f, binding x to 0. y is
again bound to the stored default argument, None. As before, this
results in the statement "y = []" binding a new empty list to the
name y. Then 0 is appened to that list, and finally the list is
returned: [0].

-- 
Neil Cerutti
The peace-making meeting scheduled for today has been cancelled due to a
conflict. --Church Bulletin Blooper


From NikitaTheSpider at gmail.com  Fri Aug 10 15:33:12 2007
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Fri, 10 Aug 2007 15:33:12 -0400
Subject: Ipc mechanisms and designs.
References: <1186760055.658942.116300@x40g2000prg.googlegroups.com>
Message-ID: <NikitaTheSpider-17A4AE.15331210082007@news-server.nc.rr.com>

In article <1186760055.658942.116300 at x40g2000prg.googlegroups.com>,
 king kikapu <aboudouvas at panafonet.gr> wrote:

> Hi,
> 
> inspired of the topic "The Future of Python Threading", i started to
> realize that the only way to utilize the power of multiple cores using
> Python, is spawn processes and "communicate" with them.
> 
> If we have the scenario:
> 
> 1. Windows (mainly) development
> 2. Processes are running in the same machine
> 3. We just want to "pass" info from one process to another. Info may
> be simple data types or user defined Python objects.
> 
> what is the best solution (besides sockets) that someone can implement
> so to have 2 actually processes that interchanged data between them ?
> I looked at Pyro and it looks really good but i wanted to experiment
> with a simpler solution.

Hi King Kikapu
There's a shared memory module for Python, but it is *nix only, I'm 
afraid. I realize you said "mainly Windows" but this module seems to do 
what you want so maybe you can work out a creative solution.

http://NikitaTheSpider.com/python/shm/

Good luck with whatever you choose

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


From carsten at uniqsys.com  Fri Aug 17 00:53:12 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 17 Aug 2007 00:53:12 -0400
Subject: defaultdict of arbitrary depth
In-Reply-To: <1187324831.082493.190970@w3g2000hsg.googlegroups.com>
References: <1187321113.841198.195100@22g2000hsm.googlegroups.com>
	<mailman.2098.1187324422.22759.python-list@python.org>
	<1187324831.082493.190970@w3g2000hsg.googlegroups.com>
Message-ID: <1187326392.3231.19.camel@localhost.localdomain>

On Thu, 2007-08-16 at 21:27 -0700, Paul McGuire wrote:
> Of course, very short and sweet!  Any special reason you wrote:
>         self.default_factory = type(self)
> instead of:
>         self.default_factory = recursivedefaultdict
> ?

Besides a pathological need to be clever? ;) The former keeps the
recursive relationship intact if you define a class that inherits from
recursivedefaultdict. The latter would create the nested entries of the
derived class as "vanilla" recursivedefaultdicts instead of instances of
the derived class. Whether this would matter in practice is, of course,
a different question.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From bj_666 at gmx.net  Wed Aug  8 07:52:03 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 Aug 2007 11:52:03 GMT
Subject: How to avoid reverse code engineering of a python executable
References: <1186573228.419760.272240@k79g2000hse.googlegroups.com>
Message-ID: <5htp32F3md0abU2@mid.uni-berlin.de>

On Wed, 08 Aug 2007 11:40:28 +0000, NicolasG wrote:

> Couple of day's ago I asked for your help on how to create a single
> file of a python executable. Now I want to proceed a little bit
> further asking how can I avoid (or at least make it difficult) for
> some one to extract my code by using reverse code engineer techniques?
> I came on pyobfuscate but I would like more suggestions and guide to
> achieve the most possible security in this matter.

Just don't deliver the code at all but provide a webservice.

Everything else can be reverse engineered and possibly will be if it is
worth the trouble.

Ciao,
	Marc 'BlackJack' Rintsch


From tommy.nordgren at comhem.se  Tue Aug 21 06:30:24 2007
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Tue, 21 Aug 2007 12:30:24 +0200
Subject: C# and Python
In-Reply-To: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
References: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
Message-ID: <6D38C3A6-8CE9-496D-8530-64C311A12C84@comhem.se>


On 21 aug 2007, at 12.01, subeen wrote:

> Hi,
> I am a newcomer in Python.  I am going to write a small Python
> application that will run in windows xp. This application needs to
> have GUI. Is it possible to make a C# application using visual studio
> 2005 that will call the python scripts? Let me explain more here:
> My program will generate a text file of 100 - 100000 random integers,
> and sort those using various sorting methods. Now I have written
> separate sorting scripts in Python (quick sort, insertion sort etc.).
> But I want to write the GUI and number generation program in C#.net.
> When the user clicks Quick Sort button, the quicksort.py will be
> called and it will sort the numbers.
>
> regards,
> Subeen
>
> --  
> http://mail.python.org/mailman/listinfo/python-list
	If C# can call extension functions written in C, then it's possible.
See info on how to embed a Python interpreter in a custom C application.
-----------------------------------------------------
An astronomer to a colleague:
-I can't understsnad how you can go to the brothel as often as you  
do. Not only is it a filthy habit, but it must cost a lot of money too.
-Thats no problem. I've got a big government grant for the study of  
black holes.
Tommy Nordgren
tommy.nordgren at comhem.se





From horpner at yahoo.com  Mon Aug  6 07:25:22 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 06 Aug 2007 11:25:22 GMT
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
Message-ID: <slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>

On 2007-08-06, Lee Fleming <countblabula at yahoo.com> wrote:
> I have a simple question. Say you have the following function:
>
> def f(x, y = []):
>     y.append(x)
>     return y
>
> print f(23)  # prints [23]
> print f(42)  # prints [23, 42]
>
> def  f(x, y=None):
>     if y is None: y = []
>     y.append(x)
>     return y
>
> print f(23)  # prints [23]
> print f(42)  # prints [42]

Default argument expressions are evaluated only once,
specifically, at the time the function definition is executed.

Statements inside the function are executed every time the
function is called.

> Why didn't the second call to f, f(42) return [23, 42]?

Because when the function is called,  the line

>     if y is None: y = []

is executed, binding a brand new empty list to y. This
"rebinding" happens every time the function is called, unless you
provide an argument for y that is not None.

For example, with the second definition...

 >>> f(f(23))
 [23, 42]

See:

http://www.ferg.org/projects/python_gotchas.html#contents_item_6

This has been called a gotcha for a good reason. The sequence of
events for the binding of default arguments isn't obvious, and
for expressions that result in mutable objects, it's not
intuitive.

-- 
Neil Cerutti
The outreach committee has enlisted 25 visitors to make calls on people who
are not afflicted with any church. --Church Bulletin Blooper


From mail at gedankenkonstrukt.de  Sat Aug 11 09:25:51 2007
From: mail at gedankenkonstrukt.de (Thomas Wittek)
Date: Sat, 11 Aug 2007 15:25:51 +0200
Subject: LRU cache?
In-Reply-To: <7x8x8ixomj.fsf_-_@ruckus.brouhaha.com>
References: <7x8x8ixomj.fsf_-_@ruckus.brouhaha.com>
Message-ID: <f9kdd3$cir$1@newsreader2.netcologne.de>

Paul Rubin schrieb:
> Anyone got a favorite LRU cache implementation?  I see a few in google
> but none look all that good.  I just want a dictionary indexed by
> strings, that remembers the last few thousand entries I put in it.

I don't know a module for that (although it might exist), but I could
imagine how to implement it.

Generally a LRU cache could be implemented as a (linked) list with a
max. size of N.
On usage of an object this object will be moved to the top of the list
(and removed from the old position).
If it's not yet stored in the cache, you (fetch it from the source and)
add it on top and remove the last one, if the list exceeds N entries.

So you need to do two things:
1) Maintain a list: Use a (linked) list.
2) Random access to that list: Use a dict (hash), that also has to be
updated on removal/addition of objects.

-- 
Thomas Wittek
Web: http://gedankenkonstrukt.de/
Jabber: streawkceur at jabber.i-pobox.net
GPG: 0xF534E231


From paddy3118 at googlemail.com  Sat Aug 18 08:41:20 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 18 Aug 2007 12:41:20 -0000
Subject: Python hash
In-Reply-To: <slrnfcdime.t75.nick@irishsea.home.craig-wood.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<1187314114.873306.187500@e9g2000prf.googlegroups.com>
	<1187316113.424465.34650@19g2000hsx.googlegroups.com>
	<slrnfcdime.t75.nick@irishsea.home.craig-wood.com>
Message-ID: <1187440880.530527.297900@50g2000hsm.googlegroups.com>

On Aug 18, 12:30 pm, Nick Craig-Wood <n... at craig-wood.com> wrote:
> I think that if you truly want to emulate a perl hash then you would
> want this which does the above but recursively.
>
> from collections import defaultdict
>
> class hash(defaultdict):
>     def __init__(self):
>         defaultdict.__init__(self, hash)
>
> D=hash()
>
> D[1][2][3][4]=5
> D[1][4][5]=6
>
> print D
>
> --
> Nick Craig-Wood <n... at craig-wood.com> --http://www.craig-wood.com/nick
Nick,
I thought I'd save your hash implementation away in my bag of tricks:


# File: autovivifying_dict.py
from collections import defaultdict
class hash(defaultdict):
    """ Used like a dict except sub-dicts automagically created as
needed
    Based on: http://groups.google.com/group/comp.lang.python/msg/f334fbdafe4afa37

    >>> D=hash()
    >>> D[1][2][3][4]=5
    >>> D[1][4][5]=6
    >>> D
    hash({1: hash({2: hash({3: hash({4: 5})}), 4: hash({5: 6})})})
    >>> hash({1: hash({2: hash({3: hash({4: 5})}), 4: hash({7: 8})})})
    hash({1: hash({2: hash({3: hash({4: 5})}), 4: hash({7: 8})})})
    >>>

    """
    def __init__(self, *a, **b):
        defaultdict.__init__(self, hash, *a, **b)
    def __repr__(self):
        return "hash(%s)" % (repr(dict(self)),)

def _test():
    import doctest
    doctest.testmod()

if __name__ == "__main__":
    _test()



- Paddy.




From brian at rkspeed-rugby.dk  Wed Aug  1 05:40:33 2007
From: brian at rkspeed-rugby.dk (Brian Elmegaard)
Date: Wed, 01 Aug 2007 08:40:33 -0100
Subject: Floats as keys in dict
Message-ID: <u1wenwq26.fsf@rkspeed-rugby.dk>

Hi

I am making a script to optimiza by dynamic programming. I do not know
the vertices and nodes before the calculation, so I have decided to
store the nodes I have in play as keys in a dict.

However, the dict keys are then floats and I have to round the values
of new possible nodes in each step. When profiling I see that the most
time consuming part of my script is rounding.

Is there a faster way than round() or is there a better way to test
than 'in' or should I store the keys in another way than a dict?

tia,
-- 
Brian (remove the sport for mail)
http://www.et.web.mek.dtu.dk/Staff/be/be.html
http://www.rugbyklubben-speed.dk


From rdm at rcblue.com  Wed Aug  8 13:32:48 2007
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 08 Aug 2007 10:32:48 -0700
Subject: the one python book
In-Reply-To: <1186334541.408225.265770@e9g2000prf.googlegroups.com>
References: <mailman.1611.1186233912.22759.python-list@python.org>
	<1186332204.704307.143440@i13g2000prf.googlegroups.com>
	<1186334541.408225.265770@e9g2000prf.googlegroups.com>
Message-ID: <20070808173300.77A4C1E4012@bag.python.org>

At 10:22 AM 8/5/2007, vasudevram wrote:
> > On Aug 4, 7:23 am, "dhr" <dima.hris... at gmail.com> wrote:
> >
> > > newbie question:
> >
> > > Is there a 'K&R" type of Python book? The book that you'd better have on
> > > your shelf if you are going into Python?
> >
>
>Python in a Nutshell, the Python Cookbook and Programming Python are
>all very good, IMO. Programming Python comes with a CD of all the
>source code in the book (at least the 2nd edition did, as well as
>Python language - this can save you some time keying in the examples.
>Of course, many of the O'Reilly books (and all 3 of these are from
>O'Reilly) have links to downloadable source code from them. Just
>Google for the name of the book, then in the results, hit the
>appropriate link to the O'Reilly site for the book, and look down the
>page for the link to the examples' source.
>
>Or (for Programming Python):
>
>http://www.oreilly.com/catalog/python2/
>http://www.oreilly.com/catalog/python3/

No CD with 3rd edition, but here are the examples: 
<http://examples.oreilly.com/python3/>

Dick Moores

======================================
                       Bagdad Weather
<http://weather.yahoo.com/forecast/IZXX0008_f.html> 



From ptmcg at austin.rr.com  Wed Aug  1 23:35:54 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 01 Aug 2007 20:35:54 -0700
Subject: frequency analysis of a DB column
In-Reply-To: <1186021313.413443.184060@i38g2000prf.googlegroups.com>
References: <1186021313.413443.184060@i38g2000prf.googlegroups.com>
Message-ID: <1186025754.948286.298040@k79g2000hse.googlegroups.com>

On Aug 1, 9:21 pm, goldtech <goldt... at worldpost.com> wrote:
> In Python 2.1 are there any tools to take a column from a DB and do a
> frequency analysis - a breakdown of the values for this column?
>
> Possibly a histogram or a table saying out of 500 records I have one
> hundred and two "301" ninety-eight "212" values and three-hundred
> "410"?
>
> Is SQL the way to for this?
>
> Of course there'd be 1000's of values....
>
> I'm not asking about connecting to the DB, just tools to collate and
> tally this sort of thing.
>
> Thanks,
> Lee G.

If you use ORDER BY in your SQL to give you sorted data, you can
easily feed it to the itertools.groupby method, following the one-line
pattern in this example:

from itertools import groupby
from random import choice

# create some random data and sort it
cards = sorted([choice("ABCDEF") for i in range(100)])

# create histogram using groupby on sorted data
# histogram is represented as a list of pair tuples,
# containing (freq,value)
cardGrps = [(len(list(g[1])),g[0]) for g in groupby(cards)]

# sort histogram by descending freq to create Pareto
cardGrps.sort(reverse=True)

print cardGrps

Prints:
[(22, 'C'), (19, 'B'), (16, 'F'), (16, 'E'), (14, 'A'), (13, 'D')]


-- Paul



From nytrokiss at gmail.com  Tue Aug 14 13:20:00 2007
From: nytrokiss at gmail.com (James Matthews)
Date: Tue, 14 Aug 2007 10:20:00 -0700
Subject: Opinions about this new Python book?
In-Reply-To: <20070814154913.D8C3C1E400A@bag.python.org>
References: <mailman.1957.1187093157.22759.python-list@python.org>
	<1187096231.194685.86030@m37g2000prh.googlegroups.com>
	<20070814154913.D8C3C1E400A@bag.python.org>
Message-ID: <8a6b8e350708141020q495b22der4c362ee3df618d82@mail.gmail.com>

i got to say that the best python book i bought was Core Python Programming
(2nd)  by Wesly Chun! Aside for all the spelling mistakes and syntax errors
that there are i feel that the book really explained the language well for
someone coming from another programming language!


On 8/14/07, Dick Moores <rdm at rcblue.com> wrote:
>
> At 05:57 AM 8/14/2007, kyosohma at gmail.com wrote:
> >On Aug 14, 7:05 am, Dick Moores <r... at rcblue.com> wrote:
> > > I'd appreciate opinions about this new Python book.
> > >
> > > Title: Python Power!: The Comprehensive Guide
> > > Author:  Matt Telles
> > > Publisher:  Course Technology
> > > Pub. Date:  Jul 27, 2007
> > > Edition:  1st edition
> > > Binding:  Paperback
> > > Pages:  508
> > > ISBN:  1598631586
> > > List Price:  34.99 USD
> > >
> > > The book on the publisher's website: <http://tinyurl.com/2dkhzg>
> > >
> > > And at BestBookDeal.com:
> > > <http://www.bestbookdeal.com/book/compare/1598631586>
> > >
> > > Thanks,
> > >
> > > Dick Moores
> >
> >I just got this book over the weekend. I'll start reading/skimming
> >through it this week and hopefully remember to get back to you.
>
> Thanks!
>
> >  By the
> >way, why do you want to know?
>
> If the experts like it, I'll buy it.
>
> Dick
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.goldwatches.com/
http://www.jewelerslounge.com
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From mhearne808 at gmail.com  Fri Aug 31 11:14:40 2007
From: mhearne808 at gmail.com (mhearne808[insert-at-sign-here]gmail[insert-dot-here]com)
Date: Fri, 31 Aug 2007 08:14:40 -0700
Subject: fcntl problems
In-Reply-To: <mailman.200.1188571375.28954.python-list@python.org>
References: <1188512377.441241.107900@q4g2000prc.googlegroups.com>
	<1188515889.352267.220790@q5g2000prf.googlegroups.com>
	<mailman.186.1188541398.28954.python-list@python.org>
	<1188568022.988154.188230@y42g2000hsy.googlegroups.com>
	<mailman.200.1188571375.28954.python-list@python.org>
Message-ID: <1188573280.155018.109360@o80g2000hse.googlegroups.com>

On Aug 31, 8:42 am, Miles <semantic... at gmail.com> wrote:
> On 8/31/07, mhearne808 wrote:
> > I have a script that will be run from a cron job once a minute.  One
> > of the things this script will do is open a file to stash some
> > temporary results.  I expect that this script will always finish its
> > work in less than 15 seconds, but I didn't want to depend on that.
> > Thus I started to look into file locking, which I had hoped I could
> > use in the following fashion:
>
> > Process A opens file foo
> > Process A locks file foo
> > Process A takes more than a minute to do its work
> > Process B wakes up
> > Process B determines that file foo is locked
> > Process B quits in disgust
> > Process A finishes its work
>
> That would look like (untested):
>
> importfcntl, sys
> f = open('foo', 'w+')
> try:
>    fcntl.flock(f.fileno(),fcntl.LOCK_EX |fcntl.LOCK_NB)
> except IOError, e:
>     if e.args[0] == 35:
>         sys.exit(1)
>     else:
>         raise
> f.seek(0, 2) # seek to end
> # do your thing with the file
> f.flush()fcntl.flock(f.fileno(),fcntl.LOCK_UN)
> f.close()
>
> -Miles

I tested that, and it works!  Thanks!

Looking at my flock(3) man page, I'm guessing that "35" is the error
code for EWOULDBLOCK.  Which system header file am I supposed to look
in to figure that magic number out?

I would make the argument that this module could be either more
pythonic, or simply documented more completely.  The open source
response, of course, would be "go for it!".

--Mike



From mail at microcorp.co.za  Fri Aug 24 05:25:13 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 24 Aug 2007 11:25:13 +0200
Subject: Socket recv(1) seems to block instead of returning end of file.
References: <mailman.164.1187862959.32294.python-list@python.org>
	<pan.2007.08.23.16.48.52.958428@datallegro.com>
Message-ID: <015001c7e65d$83a7aea0$03000080@hendrik>

 "Dan Stromberg - Datallegro" <dstr....tallegro.com> wrote:

> 
> Are you using sock.settimeout()?

Yes.

> 
> I've always done timed-out sockets in python using select; IINM, the
> settimeout method is a new addition.
> 
> I agree with Grant though - posting a minimal snippet of code that
> replicates the problem would help us help you.  In fact, it might help you
> help yourself :)

I will try - in the interim, please see my reply to Grant

 - Hendrik



From fabioztessitore at libero.it  Wed Aug 29 14:51:07 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 29 Aug 2007 18:51:07 GMT
Subject: cgi
References: <fb4a57$ojf$1@ss408.t-com.hr>
Message-ID: <46d5c01b$0$36438$4fafbaef@reader5.news.tin.it>

Il Wed, 29 Aug 2007 19:24:54 +0200, Gigs_ ha scritto:

> i have simple page and form that ask for name and color and cgi script
> that print that name in another page and background in chosen color
> 
> all the time this error pop:
> Error response
> 
> Error code 501.
> 
> Message: Can only POST to CGI scripts.
> 

I think this should be your problem,

change GET with POST in the form

bye


From bdesth.quelquechose at free.quelquepart.fr  Thu Aug 30 07:13:42 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 30 Aug 2007 13:13:42 +0200
Subject: We need PIGs :)
In-Reply-To: <mailman.131.1188450658.28954.python-list@python.org>
References: <mailman.131.1188450658.28954.python-list@python.org>
Message-ID: <46d74472$0$402$426a34cc@news.free.fr>

Martin Marcher a ?crit :
> Hello,
> 
> having worked quite a bit with python in the last months (some Java
> before, and some C++ before that) I was very impressed by an idea the
> Java people had.
> 
> Explanation: the JSRs define how to implement certain services and or
> features in Java so that they can be reused. I haven't found such a
> thing for python yet.
> 
(snip)
> My idea was to define "Python Implementation Guidelines" (PIGs) that
> specify a problem formalize it enough so that implementations are
> interchangeable (in this example create a module that has an
> "authenticate(username, password)" method so that one could easily
> take that module for any given app and then authenticate against
> postgres, and also against my plaintext file (which was the original -
> quite useless - implementation).
> 
> Does that sound like a good idea or would that be over formalization?

The problem with Java is that it makes it very painfull to bridge two 
APIs together, while Python usually makes it a breeze (easy delegation, 
no dumb-ass psycho-rigid type system). So Java's solution 
(hyper-formalization) isn't necessary here.

Now there's something along this line - just much more useful and 
flexible IMHO - in Zope3 and Twisted. You may want to look at Zope's 
"Interfaces" for more infos on this, or to read this post by the BDFL:
http://www.artima.com/weblogs/viewpost.jsp?thread=155123

HTH


From lbolognini at gmail.com  Mon Aug 20 05:49:26 2007
From: lbolognini at gmail.com (lbolognini at gmail.com)
Date: Mon, 20 Aug 2007 09:49:26 -0000
Subject: How to decompress .Z file?
In-Reply-To: <mailman.1.1187600927.13175.python-list@python.org>
References: <mailman.1.1187600927.13175.python-list@python.org>
Message-ID: <1187603366.743495.85830@l22g2000prc.googlegroups.com>

On Aug 20, 9:02 am, Hyunchul Kim <sun... at sfc.keio.ac.jp> wrote:
> How can .Z file be decompressed?
>
> According to python library reference, .Z file might not be supported by
> python, yet.


Guess you can *outsource* the process to 7zip:

http://7-zip.org/download.html

It supports .z archives.

Lorenzo



From claird at lairds.us  Wed Aug 22 11:50:56 2007
From: claird at lairds.us (Cameron Laird)
Date: Wed, 22 Aug 2007 15:50:56 +0000
Subject: Server-side scripting in python
References: <1187614732.519547.296020@j4g2000prf.googlegroups.com>
	<gi6rp4-mes.ln1@lairds.us>
	<1187755436.972359.293360@i13g2000prf.googlegroups.com>
Message-ID: <0k2up4-lla.ln1@lairds.us>

In article <1187755436.972359.293360 at i13g2000prf.googlegroups.com>,
Nagarajan  <naga86 at gmail.com> wrote:
>>
>>                         .
>>                         .
>>                         .
>Let me phrase my problem in a finer way.
>I have done simple projects in python.
>I wanted to explore web programming facet of python. The problem at my
>hand is to develop an email web client. I've developed web
>applications in PHP. I need to evaluate python-based web frameworks to
>make a smart choice of the web framework or a language like PHP, Perl
>based on performance predominantly. Do I make myself clear now?
			.
			.
			.
In general, network latency is likely to dominate the performance
of a hobbyist-scale Webmail application coded in PHP, Perl, or
Python; to base your decision predominantly on performance is ...
well, it's not what I'd recommend.  You might as well flip a coin.

Flipping a coin isn't such a bad idea; it's possible to write good
applications with any of PHP, Perl, and Python.  Even if you restrict
yourself to Python, you can flip another coin and choose almost any
of its Web frameworks.

I salute your intent to choose a Web framework wisely.  In the ab-
sence of still more detail about your situation, requirements,
constraints, ..., I don't know how to do so beyond what I've already
written.


From conra2004 at yahoo.com  Thu Aug 23 07:20:07 2007
From: conra2004 at yahoo.com (yadin)
Date: Thu, 23 Aug 2007 04:20:07 -0700
Subject: =?utf-8?q?sentance_containg_the_string_or_symbol_=CE=A9?=
Message-ID: <1187868007.012689.224290@z24g2000prh.googlegroups.com>

how can i print a sentance containg the string or symbol ? in python
and also lambda?



From http  Mon Aug  6 12:04:41 2007
From: http (Paul Rubin)
Date: 06 Aug 2007 09:04:41 -0700
Subject: Tkinter or wxpython?
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
Message-ID: <7x7io8r6na.fsf@ruckus.brouhaha.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> > No native integration - no "open file", no "browse the filesystem", no
> > rich drag and drop, no copy/paste.
> 
> File i/o and file system browsing are available from javascript if the
> user grants permission.  File system browsing for the limited purpose
> of file upload is available in regular html.  Copy/paste of ordinary
> text is always available.  However, this type of requirement is what I
> mean by a "good reason" to write a desktop gui.  It applies to some
> applications, not all.

I should also add: there is also the possibility of running a Python
program with an embedded http server on the same desktop as the
browser, using the browser purely as a gui, but with the Python
program having complete access to the file system and so forth.  This
could be seen as combining the disadvantages of both the remote web
server approach (i.e. gui elements constrained by the browser) and the
all-desktop approach (deployment issues).  However, a lot of the time
it's still just plain easier to do.  Whenever I've written a desktop
gui app I've always just been shocked at how much time goes into
making the gui look decent and do the right stuff, even though none of
mine have been even slightly slick (they've all been for industrial
applications).  When I do a web gui, it's been just a matter of
tossing some html into a file or into some print statements, viewing
it in a browser, and tweaking it a little as needed.  Maybe that's
mostly a matter of the lousy state of gui toolkits, and we actually
need a toolkit that's more like an embedded browser.  But we don't
have that at the moment.


From nagle at animats.com  Mon Aug  6 22:53:18 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 07 Aug 2007 02:53:18 GMT
Subject: All leading tabs or all leading spaces - why isn't that enforced?
Message-ID: <y8Rti.1088$3x.121@newssvr25.news.prodigy.net>

   One can argue over tab vs. space indentation, but mixing the two
is just wrong.  Why not have CPython report an error if a file has
both leading tabs and leading spaces?  I know that was proposed at
some point, but I don't think it ever went in. That would catch a
common error introduced during maintenance.

					John Nagle


From pablo.mitchell at gmail.com  Sat Aug  4 14:09:34 2007
From: pablo.mitchell at gmail.com (pablo.mitchell at gmail.com)
Date: 4 Aug 2007 11:09:34 -0700
Subject: Efficient Rank Ordering of Nested Lists
In-Reply-To: <slrnfb68lt.ho.horpner@FIAD06.norwich.edu>
References: <1186104049.022836.253470@e9g2000prf.googlegroups.com>
	<slrnfb68lt.ho.horpner@FIAD06.norwich.edu>
Message-ID: <1186250644.016630.129740@g12g2000prg.googlegroups.com>

On Aug 3, 5:53 am, Neil Cerutti <horp... at yahoo.com> wrote:
> On 2007-08-03, pablo.mitch... at gmail.com <pablo.mitch... at gmail.com> wrote:
>
>
>
> > A naive approach to rank ordering (handling ties as well) of nested
> > lists may be accomplished via:
>
> >    def rankLists(nestedList):
> >       def rankList(singleList):
> >           sortedList = list(singleList)
> >           sortedList.sort()
> >           return map(sortedList.index, singleList)
> >       return map(rankList, nestedList)
>
> >    >>> unranked = [ [ 1, 2, 3, 4, 5 ], [ 3, 1, 5, 2, 4 ], [ -1.1, 2.2,
> > 0, -1.1, 13 ] ]
> >    >>> print rankLists(unranked)
>
> >    [[0, 1, 2, 3, 4], [2, 0, 4, 1, 3], [0, 3, 2, 0, 4]]
>
> > This works nicely when the dimensions of the nested list are
> > small. It is slow when they are big.  Can someone suggest a
> > clever way to speed it up?
>
> Use binary search instead of linear.
>
>  import bisect
>  import functools
>
>  def rankLists(nestedList):
>    def rankList(singleList):
>      sortedList = list(sorted(singleList))
>      return map(functools.partial(bisect.bisect_left, sortedList), singleList)
>    return map(rankList, nestedList)
>
> --
> Neil Cerutti
> Facts are stupid things. --Ronald Reagan

Very clean and precisely what I was looking for.  Thanks for expanding
my knowledge of the language.



From evan at yelp.com  Mon Aug 20 23:50:52 2007
From: evan at yelp.com (Evan Klitzke)
Date: Mon, 20 Aug 2007 20:50:52 -0700
Subject: Retrieving a variable's name.
In-Reply-To: <cfb58d850708202042i514401ebi2cfeb8607012eae@mail.gmail.com>
References: <1187658202.236626.93600@50g2000hsm.googlegroups.com>
	<cfb58d850708202042i514401ebi2cfeb8607012eae@mail.gmail.com>
Message-ID: <cfb58d850708202050x36874056xeb858da112017352@mail.gmail.com>

On 8/20/07, Evan Klitzke <evan at yelp.com> wrote:
> On 8/20/07, rodrigo <rodrigo.cr at gmail.com> wrote:
> > How would I go about retrieving a variable's name (not its value)? I
> > want to write a function that, given a list of variables, returns  a
> > string with each variable's name and its value, like:
> >
> > a: 100
> > b: 200
>
> Let me preface my response by saying that this is a really weird thing
> to do, and almost certainly _not_ what you want to be doing.  If I was
> to run across code like this, I'd be appalled ;-)  Here's one way to
> do it, however:
>
> def make_dict(*args):
>     d = {}
>     for arg in args:
>         for key, value in globals().iteritems():
>             if value is arg:
>                 d[key] = value
>                 break
>     return d

On second thought, this won't really work, because you can have
multiple names for the same value in Python. For example, if we say a
= 2 and d = 2, it will be true that a is d (since only one copy of
small integers is made) and thus it is not possible to distinguish
whether the name that was passed in to the function is a or d.

You should just use a dictionary in your code in the first place,
rather than trying to make one out of a list of variable names and
values.

-- 
Evan Klitzke <evan at yelp.com>


From steve at holdenweb.com  Wed Aug 29 09:25:49 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 29 Aug 2007 09:25:49 -0400
Subject: Haskell like (c:cs) syntax
In-Reply-To: <1188392912.357697.192080@w3g2000hsg.googlegroups.com>
References: <fb25uh$gl9$1@online.de>	<mailman.85.1188339894.28954.python-list@python.org>	<rAbBi.13285$fb.8669@tornado.fastwebnet.it>	<mailman.99.1188389544.28954.python-list@python.org>
	<1188392912.357697.192080@w3g2000hsg.googlegroups.com>
Message-ID: <fb3s4r$nl4$2@sea.gmane.org>

Istvan Albert wrote:
> On Aug 29, 8:12 am, Ricardo Ar?oz <ricar... at gmail.com> wrote:
> 
>>>> Caution : L[0] and L[1:] are COPIES of the head and tail of the list.
> 
>> Sorry, should have written RETURN copies instead of ARE copies.
> 
> L[0] does not return a copy, it does what is says, returns the object
> stored at index 0.
> 
Well, if we're going to get picky it actually returns a reference to the 
object referenced by the list item indexed by 0. What was your point?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From steve at holdenweb.com  Sat Aug 11 15:46:09 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 11 Aug 2007 15:46:09 -0400
Subject: Ligmail bug?
In-Reply-To: <20070812005057.GA15805@ob41.org>
References: <20070812005057.GA15805@ob41.org>
Message-ID: <f9l3m2$hb0$1@sea.gmane.org>

No.23 wrote:
[way too much, ending with]
>    File "/usr/local/lib/python2.5/urllib2.py", line 1076, in do_open
>      raise URLError(err)
>  urllib2.URLError: <urlopen error (-3, 'temporary failure in name resolution')>
> 
> 
> other information:
> Shell:~ >: uname -a
> OpenBSD ob41.org 4.1 ob41#0 i386
> Shell:~ >: python
> Python 2.5 (r25:51908, Mar  8 2007, 20:46:47)
> [GCC 3.3.5 (propolice)] on openbsd4
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import libgmail
>>>> print libgmail.Version
> 0.1.6
> 
> 
So why does a temporary failure in name resolution seem like a library 
bug? This is just the library reporting back an error from the network 
or transport layer.

Is the error repeatable? How many times over what period of time have 
you experienced it?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From antroy at gmail.com  Tue Aug 21 04:38:22 2007
From: antroy at gmail.com (Ant)
Date: Tue, 21 Aug 2007 01:38:22 -0700
Subject: Newbee Question
In-Reply-To: <1187650036.450645.185500@a39g2000hsc.googlegroups.com>
References: <mailman.15.1187620149.26576.python-list@python.org>
	<1187621470.484615.7010@i13g2000prf.googlegroups.com>
	<mailman.19.1187621934.26576.python-list@python.org>
	<1187622390.854759.162320@q3g2000prf.googlegroups.com>
	<1187650036.450645.185500@a39g2000hsc.googlegroups.com>
Message-ID: <1187685502.855643.122800@r34g2000hsd.googlegroups.com>

On Aug 20, 11:47 pm, hd1... at yahoo.com wrote:
...
> Thanks for the help. By the way I am trying to learn the python after
> work and on weekends. If it was a dumb question, to this group, I will
> not bother you all again.

It's not so much that it was a dumb question, but that it was asked in
a dumb way :-) You'll get the most help in this group if you can show
some evidence that you've had a go (the size of this thread ironically
trounces that argument of course ;-) .)

It's better to learn if people give you a critique of your own attempt
at the code, rather than looking at other peoples efforts. There's a
guide on how to ask good questions here: http://www.catb.org/~esr/faqs/smart-questions.html

For what it's worth, here's a gratuitous version using generators, and
one you should come back to once you've mastered the basics of Python:

def counter(std_rate, over_rate, limit):
    stops = 0
    while True:
        stops += 1
        wage = stops * std_rate + max(0, stops - limit) * (over_rate -
std_rate)
        yield stops, wage

truck = counter(0.4, 1.4, 22)

for i in range(30):
    print "Stopped %s times, with accumulated wage of $%s" %
truck.next()

--
Ant...

http://antroy.blogspot.com/




From arkanes at gmail.com  Thu Aug 23 07:13:26 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 23 Aug 2007 06:13:26 -0500
Subject: Impersonate another user temporarily (Unix and Windows)
In-Reply-To: <1187866104.967297.324650@j4g2000prf.googlegroups.com>
References: <1187809798.274511.230240@z24g2000prh.googlegroups.com>
	<mailman.161.1187858227.32294.python-list@python.org>
	<1187866104.967297.324650@j4g2000prf.googlegroups.com>
Message-ID: <4866bea60708230413k1d426aa7j97830e8190b2ced6@mail.gmail.com>

On 8/23/07, billiejoex <gnewsg at gmail.com> wrote:
> On 23 Ago, 10:38, Tim Golden <m... at timgolden.me.uk> wrote:
> > billiejoex wrote:
> > > Hi there. I'm writing a modification for a FTP server library I'm
> > > maintaining.
> > > Depending on the system I'd want to temporarily impersonate the logged
> > > user to perform actions on filesystem.
> > > Something like:
> >
> > > try:
> > >     change_user('user', 'password')
> > >     os.rmdir('dir')
> > > except:
> > >     print "some error"
> > > finally:
> > >     change_user('old_user', 'password')
> >
> > > On Unix I took at look at os.seteuid() and os.setegid() functions and
> > > I noticed they could be useful for my purpose.
> > > On Windows I have no idea about how could I emulate a similar
> > > behaviour.
> > > Could someone please point me in the right direction?
> >
> > (Warning: not tried, but at least gives you the things to Google for!)
> >
> > You need the win32security module from the pywin32 extensions. [1]
> > In particular, you want to look at the LogonUser and
> > ImpersonateLoggedOnUser functions.
> >
> > TJG
> >
> > [1]http://pywin32.sf.net- Nascondi testo tra virgolette -
> >
> > - Mostra testo tra virgolette -
>
> Thanks for suggestion.
> I made it.
>


Note that running your process as a user with enough priviledges to
impersonate another user pretty much eliminates all the benefits of
running as a low-priviledged user in the first place. Consider
re-thinking your application model and having an "ftp" user instead.


From musiccomposition at gmail.com  Tue Aug 21 11:23:51 2007
From: musiccomposition at gmail.com (Benjamin)
Date: Tue, 21 Aug 2007 15:23:51 -0000
Subject: The folder a script is executed in
In-Reply-To: <1187687436.476773.276550@22g2000hsm.googlegroups.com>
References: <1187687436.476773.276550@22g2000hsm.googlegroups.com>
Message-ID: <1187709831.722991.99490@l22g2000prc.googlegroups.com>

On Aug 21, 4:10 am, aine_ca... at yahoo.com wrote:
> Hi,
>
> How do I find out what folder a script is in while it is executing?
>
> For example, for the file "C:/folder/script.py" contain the following
> two lines of code -
>
> myLocation = GetMyLocation()
> print myLocation
def GetMyLocation():
    runningFile = sys.argv[0] if __name__ == "__main__" else __file__
    return os.path.dirname(runningFile)
>
> >> C:/folder
>
> Thanks,
>
> Aine.




From iclark at mail.ewu.edu  Tue Aug 21 19:05:01 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Tue, 21 Aug 2007 16:05:01 -0700
Subject: Symbolic Link
In-Reply-To: <1187646982.760523.195750@i38g2000prf.googlegroups.com>
References: <1187475296.173269.263080@k79g2000hse.googlegroups.com>	<iwWxi.28394$RX.20505@newssvr11.news.prodigy.net>	<1187555373.202634.163160@57g2000hsv.googlegroups.com>
	<1187646982.760523.195750@i38g2000prf.googlegroups.com>
Message-ID: <fafr2t$4tb$1@sea.gmane.org>

Hyuga wrote:
> On Aug 19, 4:29 pm, mosscliffe <mcl.off... at googlemail.com> wrote:
>> The source file is in an area which python can see, but not the
>> browser.  I am trying to make a link in a browser friendly area so I
>> can use it to display an image file.
> 
> You might want to try using an .htaccess file.  Place a file
> called .htaccess in the "browser friendly area" and place in it the
> line:
> 
> Options +FollowSymLinks
> 
> Assuming your hosting service will allow that, then it should work.
> If not, then why not just copy the image files?  Storage is cheap
> these days.
> 
> Hyuga
> 

My question would be why a symbolic link? Why not a hard link? Are the 
two directories on different mount points? After the script finishes 
does python need to see that image file again? Why not just move it?

Ian



From xcolwell at gmail.com  Mon Aug 20 14:51:05 2007
From: xcolwell at gmail.com (brien colwell)
Date: Mon, 20 Aug 2007 11:51:05 -0700
Subject: Handwriting Recognition
In-Reply-To: <1187635063.531103.7610@d55g2000hsg.googlegroups.com>
References: <mailman.6.1187616526.26576.python-list@python.org>
	<1187635063.531103.7610@d55g2000hsg.googlegroups.com>
Message-ID: <ed5105470708201151v234977del2b4c4626001e0aa@mail.gmail.com>

Just a note -- Microsoft has a tablet SDK that solves some of these
problems. I think it is for C#

On 8/20/07, gregpinero at gmail.com <gregpinero at gmail.com> wrote:
> On Aug 20, 9:00 am, "Ian Dickinson" <I_Dickin... at bitwise.co.uk> wrote:
> > However a friend of mine who is a special educational needs teacher was asking me if I could write some handwriting recognition software for her, which would allow here pupils to write their input directly on a graphics tablet and then have this input converted to a text sting for further processing. The handwriting would be distinct letters either upper or lower case but not joined up writing.  I would like to help out here as I think this is a valuable  and worthwhile area of education so has anyone out there got any advice that could help me out.
>
> Sure you just use the handwriting recognition library:
>
> import handwriting
> ...
>
> http://docs.python.org/lib/module-handwriting.html
>
> ha ha, I kid, I kid.
>
> I don't think this is an easy problem to solve.  You'd probably want
> Python to be a wrapper around whatever hand-writing recognition
> software you find or buy.  I know handwriting recognition software can
> read the hand-writing on checks, so that may be a starting point.
>
> Alternatively, Tesseract is an up and coming open source OCR engine.
> Perhaps you could build on that to do limited handwriting recognition:
> http://code.google.com/p/tesseract-ocr/
>
> And here's a wikipedia entry on the subject to familiarize yourself
> with it a bit:
> http://en.wikipedia.org/wiki/Handwriting_recognition
>
> Finally, perhaps you could buy a graphics tablet that already offers
> handwriting recognition and go from there.
>
> -Greg
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From bj_666 at gmx.net  Thu Aug  2 01:53:44 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 2 Aug 2007 05:53:44 GMT
Subject: Is shelve/dbm supposed to be this inefficient?
References: <mailman.1469.1186012073.22759.python-list@python.org>
Message-ID: <5hd9r8F3kebk9U1@mid.uni-berlin.de>

On Wed, 01 Aug 2007 15:47:21 -0800, Joshua J. Kugler wrote:

> My original data is 33MB.  When each row is converted to python lists, and
> inserted into a shelve DB, it balloons to 69MB.  Now, there is some
> additional data in there namely a list of all the keys containing data (vs.
> the keys that contain version/file/config information), BUT if I copy all
> the data over to a dict and dump the dict to a file using cPickle, that
> file is only 49MB.  I'm using pickle protocol 2 in both cases.
> 
> Is this expected? Is there really that much overhead to using shelve and dbm
> files?  Are there any similar solutions that are more space efficient?  I'd
> use straight pickle.dump, but loading requires pulling the entire thing
> into memory, and I don't want to have to do that every time.

You did not say how many records you store.  If the underlying DB used by
`shelve` works with a hash table it may be expected to see that "bloat". 
It's a space vs. speed trade off then.

Ciao,
	Marc 'BlackJack' Rintsch


From tim at tdw.net  Mon Aug 20 14:59:21 2007
From: tim at tdw.net (Tim Williams)
Date: Mon, 20 Aug 2007 19:59:21 +0100
Subject: reading a line in file
In-Reply-To: <B81734159.43.61526.2@mxextra>
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>
	<2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com>
	<B81734159.43.61526.2@mxextra>
Message-ID: <9afea2ac0708201159t4602fe3fpfb738a22f063f37@mail.gmail.com>

On 20/08/07, Brian McCann <Brian.McCann at viziant.net> wrote:
>
> Hi,
>
> I can read in the whole file build.number which has the following lines
> how do I just capture the value of build.number and assign it to a variable
> Thanks,
> Brian
>
> contents of file build.number:
> #Build Number for ANT. Do not edit!
> #Mon Aug 20 04:04:51 EDT 2007
> build.number=1
> buildinfo.py
> ##################################
> #!/usr/bin/python
> import string
> import os
> import sys
> import time
> import errno
> import shutil
> buildinfo = "build.number"
> input = open(buildinfo, 'r')
> for line in input:
>         print line
> #########################################
>
> command line when script is run
> $ buildinfo.py
> #Build Number for ANT. Do not edit!
>
> #Mon Aug 20 04:04:51 EDT 2007
> build.number=1
>
>

This is preferred nowadays

for line in open(buildinfo):
        print line

Without a sample of the data, no-one can help you further.   If this
is homework, you should say so, people will give you guidance :)


From thomas at jollans.com  Wed Aug  1 20:08:50 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Thu, 2 Aug 2007 02:08:50 +0200
Subject: Is shelve/dbm supposed to be this inefficient?
In-Reply-To: <f8r62b$9lm$1@sea.gmane.org>
References: <f8r62b$9lm$1@sea.gmane.org>
Message-ID: <200708020208.53982.thomas@jollans.com>

On Thursday 02 August 2007, Joshua J. Kugler wrote:
> I am using shelve to store some data since it is probably the best solution
> to my "data formats, number of columns, etc can change at any time"
> problem.  However, I seem to be dealing with bloat.
>
> My original data is 33MB.  When each row is converted to python lists, and
> inserted into a shelve DB, it balloons to 69MB.  Now, there is some
> additional data in there namely a list of all the keys containing data (vs.
> the keys that contain version/file/config information), BUT if I copy all
> the data over to a dict and dump the dict to a file using cPickle, that
> file is only 49MB.  I'm using pickle protocol 2 in both cases.
>
> Is this expected? Is there really that much overhead to using shelve and
> dbm files?  Are there any similar solutions that are more space efficient? 
> I'd use straight pickle.dump, but loading requires pulling the entire thing
> into memory, and I don't want to have to do that every time.
>
> [Note, for those that might suggest a standard DB.  Yes, I'd like to use a
> regular DB, but I have a domain where the number of data points in a sample
> may change at any time, so a timestamp-keyed dict is arguably the best
> solution, thus my use of shelve.]

Have you considered a directory full of pickle files ? (In effect, replacing 
the dbm with the file system) i.e. something like (untested)

class DirShelf(dict):
    def __init__(self, dirname):
        self.dir = dirname
        self.__repl_dict = {}

    def __contains__(self, key):
        assert isinstance(key, str)
        assert key.isalnum() # or similar portable check for is-name-ok
        return os.path.exists(os.path.join(self.dir, key))

    def has_key(self, key):
        return key in self

    def __getitem__(self, key):
        try:
            if key not in self.__repl_dict:
                self.__repl_dict[key] = \
                    cPickle.load(file(os.path.join(self.dir, key), 'rb'),
                                 protocol=2)
            return self.__repl_dict[key]
        except IOError, e:
          raise KeyError(e)

    def __setitem__(self, key, val):
        assert isinstance(key, str)
        assert key.isalnum() # or similar portable check for is-name-ok
        self.__repl_dict[key] = val
        self.flush()

    def flush(self):
        for k, v in self.__repl_dict.iteritems():
            cPickle.dump(v, file(os.path.join(self.dir, k), 'wb'),
                         protocol=2)

    def __del__(self):
        self.flush()


-- 
      Regards,                       Thomas Jollans
GPG key: 0xF421434B may be found on various keyservers, eg pgp.mit.edu
Hacker key <http://hackerkey.com/>:
v4sw6+8Yhw4/5ln3pr5Ock2ma2u7Lw2Nl7Di2e2t3/4TMb6HOPTen5/6g5OPa1XsMr9p-7/-6
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From michael at stroeder.com  Fri Aug 24 02:27:12 2007
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Fri, 24 Aug 2007 08:27:12 +0200
Subject: python setup.py: how to override a setup.cfg value ?
In-Reply-To: <mailman.193.1187895900.32294.python-list@python.org>
References: <mailman.193.1187895900.32294.python-list@python.org>
Message-ID: <0ba2q4-e5u.ln1@nb2.stroeder.com>

Chris Shenton wrote:
> I'm building python-ldap and need to change values of library and
> include paths that are in the setup.cfg file.  This is an automated
> build (using "buildit") so I'd prefer not to have edit the .cfg by hand,
> with sed, or even with buildit's Substitute().

Almost everything in python-ldap's setup.cfg is subject to local system
configuration. The default shipped in source distribtion has to be
tweaked on most systems (examples: Build/setup.cfg.*). Therefore I don't
understand why you don't just provide your own setup.cfg reflecting your
OpenLDAP/OpenSSL/Cyrus-SASL/Kerberos installation.

I don't know anything about "buildit" though.

Ciao, Michael.


From zyzhu2000 at gmail.com  Thu Aug  2 08:49:39 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Thu, 02 Aug 2007 05:49:39 -0700
Subject: standalone process to interact with the web
In-Reply-To: <5havr9F3inuj7U1@mid.uni-berlin.de>
References: <1185899130.331170.151980@e16g2000pri.googlegroups.com>
	<5havr9F3inuj7U1@mid.uni-berlin.de>
Message-ID: <1186058979.471801.120850@i38g2000prf.googlegroups.com>

On Aug 1, 3:50 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> beginner wrote:
> > Hi Everyone,
>
> > I am looking for a way to allow a standalone python process to easily
> > interactive with a few web pages. It has to be able to easily receive
> > requests from the web and post data to the web.
>
> > I am thinking about implementing a standalone soap server, but I am
> > not sure which library is good.
>
> > Any suggestions?
>
> Forget SOAP. Use XMLRPC. SOAP is bloated, not to interoperable and the last
> time I checked (has been a while though) the python-implementations were
> troublesome.
>
> http://wanderingbarque.com/nonintersecting/2006/11/15/the-s-stands-fo...
>
> Diez

Thanks for the sgguestion. XML RPC is definitely a good candidate.



From steveo at syslang.net  Fri Aug 24 13:00:09 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Fri, 24 Aug 2007 13:00:09 -0400 (EDT)
Subject: How to replace a method in an instance.
In-Reply-To: <alpine.LFD.0.999.0708241223480.30194@saturn.syslang.net>
References: <mailman.258.1187971369.32294.python-list@python.org>
	<1187971953.261328.219000@q3g2000prf.googlegroups.com>
	<alpine.LFD.0.999.0708241223480.30194@saturn.syslang.net>
Message-ID: <alpine.LFD.0.999.0708241254420.30194@saturn.syslang.net>

On Friday, Aug 24th 2007 at 12:26 -0400, quoth Steven W. Orr:

=>On Friday, Aug 24th 2007 at 09:12 -0700, quoth kyosohma at gmail.com:
=>
=>=>On Aug 24, 11:02 am, "Steven W. Orr" <ste... at syslang.net> wrote:
=>=>> In the program below, I want this instance to end up calling repmeth
=>=>> whenever inst.m1 is called. As it is now, I get this error:
=>=>>
=>=>> Hello from init
=>=>> inst =  <__main__.CC instance at 0x402105ec>
=>=>> Traceback (most recent call last):
=>=>>    File "./foo9.py", line 17, in ?
=>=>>      inst.m1()
=>=>> TypeError: repmeth() takes exactly 1 argument (0 given)
=>=>>
=>=>> #! /usr/bin/python
=>=>> def repmeth( self ):
=>=>>      print "repmeth"
=>=>>
=>=>> class CC:
=>=>>      def __init__( self ):
=>=>>          self.m1 = repmeth
=>=>>          print 'Hello from init'
=>=>>
=>=>>      def m1 ( self ):
=>=>>          print "m1"
=>=>>
=>=>> inst = CC()
=>=>> inst.m1()
=>
=>=>Remove "self" from repmeth as it's not required in a function, only in
=>=>functions that are defined within a class. Of course, a function in a
=>=>class is also know as a method.
=>
=>Sorry. I need repmeth to have self passed to it automatically if it's 
=>called. I didn't mean to obfuscate the problem by not making a reference 
=>to self in repmeth. 
=>
=>Am I being clear?

On Friday, Aug 24th 2007 at 18:44 +0200, quoth Wildemar Wildenburger:

=>Steven W. Orr wrote:
=>> Sorry. I need repmeth to have self passed to it automatically if it's
=>> called. I didn't mean to obfuscate the problem by not making a 
reference
=>> to self in repmeth.
=>>
=>> Am I being clear?
=>>
=>>
=>Sort of. Maybe you fare better if you state what you want to achieve,
=>instead of how you think you should do it. Chances are you don't need to
=>replace a method in __init__, but there's another, less tricky way.
  
Ok. I have a collection of classes that are produced by a factory. They   
all inherit from a baseclass. One (maybe more) of the classes inherits a  
method that he shouldn't. All I want is to be able to change that
particular class so that he will have the special method that he needs    
instead of the default one that he inherits. I was thinking that instead 
of making a special class for CC to inherit from which would give him his 
special replacement method(s), I could simply assign them in a manner 
which would more easily lend itself to later being table driven.

If I had a choice, I'd rather not do it in init. Instead, I'd rather be 
able to say something like 
CC.m1 = repmeth
but since in the real world, CC inherits from his baseclass, the above 
assignment causes the baseclass to be altered. :-(

Please tell me if I need to provide more.

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From uymqlp502 at sneakemail.com  Thu Aug 30 21:18:16 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Thu, 30 Aug 2007 18:18:16 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <46d76790$0$410$426a74cc@news.free.fr>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<1188430887.481586.106760@l22g2000prc.googlegroups.com>
	<mailman.159.1188499976.28954.python-list@python.org>
	<1188504811.019632.186580@x35g2000prf.googlegroups.com>
	<46d75116$0$401$426a74cc@news.free.fr>
	<1188517050.174081.265900@x40g2000prg.googlegroups.com>
	<46d75d33$0$6231$426a34cc@news.free.fr>
	<1188520454.996940.293030@m37g2000prh.googlegroups.com>
	<46d76790$0$410$426a74cc@news.free.fr>
Message-ID: <1188523096.427717.87380@x35g2000prf.googlegroups.com>


> Pre and post conditions applying to the class ? Now that's an
> interesting concept. IIRC, Eiffels pre and post conditions only apply to
> methods, and I fail to see how they could apply to a class. But since
> you're an expert on the subject, I don't doubt you'll enlighten us ?

I made a simple mistake. Excuse me. Oh wait ... aren't you one of the
sensitivity police who
laid into me for criticizing someone else. For the record, the guy I
criticized
made ridiculous assertions about DBC. All I did was to make a simple
mistake about
an inconsequential matter. No, pre and post conditions obviously don't
apply to classes,
but all I said was that that's how it appeared to me "at first
glance."

If you are upset about my criticism of one of your colleagues, please
tell him to quite making
outrageous assertions about something he obviously knows little about.



From arkanes at gmail.com  Wed Aug  1 11:13:50 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 1 Aug 2007 10:13:50 -0500
Subject: Python end of file marker similar to perl's __END__
In-Reply-To: <1185976656.753817.27980@x40g2000prg.googlegroups.com>
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
	<1185976656.753817.27980@x40g2000prg.googlegroups.com>
Message-ID: <4866bea60708010813x554078bale5d81237f52a6d15@mail.gmail.com>

On 8/1/07, beginner <zyzhu2000 at gmail.com> wrote:
> On Jul 31, 10:53 pm, beginner <zyzhu2... at gmail.com> wrote:
> > Hi All,
> >
> > This is just a very simple question about a python trick.
> >
> > In perl, I can write __END__ in a file and the perl interpreter will
> > ignore everything below that line. This is very handy when testing my
> > program. Does python have something similar?
> >
> > Thanks,
> > Geoffrey
>
> Thanks everyone for responding. It doesn't look like python has it. I
> would definitely miss it. As Steve said, the nice thing about __END__
> is that things below __END__ do not have to have legit syntax. That
> let me focus on the lines of code I am debugging and do not have to
> worry about some bad syntax down the line. This feature is especially
> handy if I am, saying, replacing modoules or changing data structures.
>

You'll probably find greater gains by embracing the limitation and
using it to help you refactor your code into smaller, more discrete
modules. Many of pythons limitations that beginners complain about are
of this nature.


From glenn.chappell at gmail.com  Sat Aug 11 21:59:48 2007
From: glenn.chappell at gmail.com (glenn.chappell at gmail.com)
Date: Sun, 12 Aug 2007 01:59:48 -0000
Subject: wxPython - drawing without paint event
In-Reply-To: <5i5l0dF2lortaU1@mid.individual.net>
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
	<1186738813.373909.96230@x35g2000prf.googlegroups.com>
	<1186796567.331348.42450@q3g2000prf.googlegroups.com>
	<5i5l0dF2lortaU1@mid.individual.net>
Message-ID: <1186883988.585048.16590@m37g2000prh.googlegroups.com>

On Aug 11, 3:31 am, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
>  glenn.chapp... at gmail.com wrote:
> > On a related topic, it seems like it would be nice to do *all*
> > drawing in
> > response topaintevents. When I get aneventfrom the timer, I
> > would just tell wx that part of the window needs redrawing, and
> > depend on it to give me apainteven when nothing of higher
> > priority needs to be done.
>
> One nice strategy from an example in "wxPython in Action" is the
> following:
>
> * the frame has Draw methods that draw into a BufferedDC, which is
> chained to a bitmap member
>
> * inside thepaintmethod, the bitmap member is drawn to screen

Okay, but how do I tell wx that it needs to send me a paint event?



From rcrida at gmail.com  Thu Aug 30 08:05:41 2007
From: rcrida at gmail.com (Robert)
Date: Thu, 30 Aug 2007 12:05:41 -0000
Subject: logging.config.fileConfig disables existing loggers
Message-ID: <1188475541.150838.273330@22g2000hsm.googlegroups.com>

Hi

I have been grappling today with some unexpected behaviour from
logging.config.fileConfig.

I am using the following config file:
[loggers]
keys=root

[handlers]
keys=console

[formatters]
keys=form01

[logger_root]
level=DEBUG
handlers=console

[handler_console]
class=StreamHandler
level=NOTSET
formatter=form01
args=(sys.stdout,)

[formatter_form01]
format="%(asctime)s - %(name)s - %(filename)s:%(lineno)s - %
(levelname)s - %(message)s"
datefmt=

As you can see, it sets the root logger level to be DEBUG. I would
expect this to have the same effect as calling logger.basicConfig with
a level = DEBUG. What instead happens is that all my loggers become
disabled. One might argue that the loggers should only be created
after configuring the logger, but what about using the listening
method to configure again later...

While I can understand that the application of a new config file is
not incremental, ie should override any previous configuration
completely, it does not appear right that only loggers explicitly
named in the config file are enabled. I would expect that if I enabled
a particular logger then all child loggers should be enabled too.
Alternatively one needs to know the names of all loggers a-priori in
order to be able to monitor them.

So I took the liberty to try to discern what is going on. The culprit
(from my perspective) was the logging.config._install_loggers method,
particularly the last two lines which disable any logger not mentioned
in the config file. If those lines are deleted and a new loop is
created at the top of the function which resets all existing loggers
to their default status, then we see the desired behaviour. This seems
quite simple and sensible. Below is a patch file for applying the
change. What do people think?

Robert

--- config.py.old       2007-08-30 13:42:39.000000000 +0200
+++ config.py   2007-08-30 13:53:15.000000000 +0200
@@ -173,6 +173,14 @@
 def _install_loggers(cp, handlers):
     """Create and install loggers"""

+    # reset all existing loggers so that they can inherit new
configuration
+    for log in logging.root.manager.loggerDict.keys():
+        logger = logging.root.manager.loggerDict[log]
+        logger.level = logging.NOTSET
+        logger.propagate = 1
+        logger.handlers = []
+        logger.disabled = 0
+
     # configure the root first
     llist = cp.get("loggers", "keys")
     llist = string.split(llist, ",")
@@ -192,16 +200,6 @@
         for hand in hlist:
             log.addHandler(handlers[hand])

-    #and now the others...
-    #we don't want to lose the existing loggers,
-    #since other threads may have pointers to them.
-    #existing is set to contain all existing loggers,
-    #and as we go through the new configuration we
-    #remove any which are configured. At the end,
-    #what's left in existing is the set of loggers
-    #which were in the previous configuration but
-    #which are not in the new configuration.
-    existing = root.manager.loggerDict.keys()
     #now set up the new ones...
     for log in llist:
         sectname = "logger_%s" % log
@@ -212,8 +210,6 @@
         else:
             propagate = 1
         logger = logging.getLogger(qn)
-        if qn in existing:
-            existing.remove(qn)
         if "level" in opts:
             level = cp.get(sectname, "level")
             logger.setLevel(logging._levelNames[level])
@@ -227,12 +223,6 @@
             for hand in hlist:
                 logger.addHandler(handlers[hand])

-    #Disable any old loggers. There's no point deleting
-    #them as other threads may continue to hold references
-    #and by disabling them, you stop them doing any logging.
-    for log in existing:
-        root.manager.loggerDict[log].disabled = 1
-

 def listen(port=DEFAULT_LOGGING_CONFIG_PORT):
     """



From tn.pablo at gmail.com  Sun Aug 19 21:04:34 2007
From: tn.pablo at gmail.com (Pablo Torres)
Date: Mon, 20 Aug 2007 01:04:34 -0000
Subject: Python question (PyNoob)
In-Reply-To: <3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d@bt.com>
References: <3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d@bt.com>
Message-ID: <1187571874.727068.262630@19g2000hsx.googlegroups.com>

On Aug 19, 7:33 pm, Anonymous <no.re... at here.com> wrote:
> I have exp with C/C++ (and a few other langs). I want to use Python to
> start doing the ff:
>
> 1). Data Munging (text processing) - instead of Perl
> 2). Automating my build process
> 3). (Possibly) some web data retrieval jobs
>
> Can anyone point me to resurces/possibly scripts that can get me up to
> speed (to do these 3 things) ASAP, without having to learn the basics of
> programming?

Sure. Go here: http://www.google.com, then type all that and hit
"Google Search". That should turn up a wealth of information.

P.S  You can't do all that without learning the basics of programming.



From tommy.nordgren at comhem.se  Wed Aug 22 07:41:24 2007
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Wed, 22 Aug 2007 13:41:24 +0200
Subject: Dispatching default application for file, cross platform.
In-Reply-To: <fah1nc$cqq$02$1@news.t-online.com>
References: <01e101c7e48d$e0e9f860$03000080@hendrik>
	<mailman.106.1187774244.32294.python-list@python.org>
	<fah1nc$cqq$02$1@news.t-online.com>
Message-ID: <CF8AC00A-6639-4931-9423-2016416CECD6@comhem.se>


On 22 aug 2007, at 12.04, Peter Otten wrote:

> Tim Golden wrote:
>
>> Hendrik van Rooyen wrote:
>>> How do I do the equivalent of clicking (in SuSe) or double  
>>> clicking (in
>>> Windows) on a file?
>>>
>>> In effect I want to tell the OS - take this file and feed it to the
>>> application that is registered for it.
>
>> os.startfile
>
> Unfortunately this is Windows-only.
> For KDE you can use
>
> $ kfmclient exec yourfile
>
> Peter
> -- 
> http://mail.python.org/mailman/listinfo/python-list
	On Mac OS X, invoke the command /usr/bin/open -a <Application>  
file , or /usr/bin/open file
------
What is a woman that you forsake her, and the hearth fire and the  
home acre,
to go with the old grey Widow Maker.  --Kipling, harp song of the  
Dane women
Tommy Nordgren
tommy.nordgren at comhem.se





From http  Thu Aug 16 15:34:33 2007
From: http (Paul Rubin)
Date: 16 Aug 2007 12:34:33 -0700
Subject: (sort of) deterministic timing in Python
References: <1i2si8h.1qc8f77i68gyeN%johnmfisher@comcast.net>
Message-ID: <7xlkcbgto6.fsf@ruckus.brouhaha.com>

johnmfisher at comcast.net (John Fisher) writes:
> mark start time
> start event
>         event finishes
> count time until next interval
> start second event???
> 
> rather than this:
> 
> start event
>         event finishes
> sleep for interval
> start second event
> ...
> So how do I accomplish this in Python with a minimum of labour?

Normally I'd use something like:

   from time import time

   t0 = time()
   start event ... event finishes
   t1 = time()
   elapsed = t1 - t0
   sleep(interval - elapsed)
   start second event ...

Am I missing something?


From arkanes at gmail.com  Mon Aug  6 13:54:27 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 6 Aug 2007 12:54:27 -0500
Subject: is it possible to improve traceback messages ?
In-Reply-To: <46B75F9E.5020309@mailbox.kun.nl>
References: <46B75F9E.5020309@mailbox.kun.nl>
Message-ID: <4866bea60708061054l7fd1b762u17d22fd40db5d559@mail.gmail.com>

On 8/6/07, Stef Mientki <S.Mientki-nospam at mailbox.kun.nl> wrote:
> hello,
>
> Most of time I get an error message, it is sufficient to solve to problem.
> Sometimes it's not clear to me what the problem is
> like this one:
>
>      N = int (log10(self.Value)) + 1
> TypeError: int() argument must be a string or a number
>
> In order to solve it, in general I put some print statements,
> before the line with the problem,
> printing values and types of all variables.
>
> I think it would be much more convenient,
> if the traceback or error exception ( don't know how it works exactly),
> would print the type and value of all variables and constants used in the last line.
>
> Can this be done (in a easy way).
>

See the cgitb module.


From per9000 at gmail.com  Wed Aug 15 10:06:37 2007
From: per9000 at gmail.com (per9000)
Date: Wed, 15 Aug 2007 07:06:37 -0700
Subject: encrypting files + filestreams?
Message-ID: <1187186797.579680.206820@19g2000hsx.googlegroups.com>

Hi python people,

I am trying to figure out the best way to encrypt files in python.

I've build a small script (see below) that encrypts the ubuntu 7.04
iso file in 2 minutes (I like python :) ).

But I have some thoughts about it. By pure luck (?) this file happened
to be N*512 bytes long so I do not have to add crap at the end - but
on files of the size N*512 + M (M != 521) I will add some crap to make
it fit in the algorithm. When I later decrypt I will have the stuff I
do not want. How do people solve this? (By writing the number of
relevant bytes in readable text in the beginning of the file?)

Also I wonder if this can be solved with filestreams (Are there
streams in python? The only python file streams I found in the evil
search engine was stuff in other forums.)


Other comments are of course also welcome,
Per


# crypto_hardcoded.py starts here

from Crypto.Cipher import AES

def encrypt2(cryptor, infile, outfile):
    """enly encrypt a few bytes at a time"""

    size = 512
    bytes = infile.read(size)

    seek = 0
    interval = 97
    ctr = 0

    while len(bytes) == size:
        seek += size
        if ctr % interval == 0:
            print '\r%15d bytes completed' %  (seek),
        ctr += 1

        outfile.write(cryptor.encrypt(bytes))
        # change to this to decrypt
        # outfile.write(cryptor.decrypt(bytes))
        bytes = infile.read(size)

    if len(bytes) != 0:
        bytes += "#" * (size - len(bytes))
        outfile.write(cryptor.encrypt(bytes))
        seek += len(bytes)

    print '\r%15d bytes completed' %  (seek)

if __name__ == "__main__":
    crptz = AES.new("my-secret_passwd")
    ifile = file('/tmp/ubuntu-7.04-desktop-i386.iso','r')
    ofile = file('/tmp/ubuntu-7.04-desktop-i386.iso.out','w')

    encrypt2(crptz, ifile, ofile)
    ifile.close()
    ofile.close()

# crypto_hardcoded.py ends here



From robert.rawlins at thinkbluemedia.co.uk  Thu Aug  9 06:01:56 2007
From: robert.rawlins at thinkbluemedia.co.uk (Robert Rawlins - Think Blue)
Date: Thu, 9 Aug 2007 11:01:56 +0100
Subject: Launching App
Message-ID: <00e301c7da6c$51ee3fc0$f5cabf40$@rawlins@thinkbluemedia.co.uk>

Hello Guys,

 

I'm looking for the best method to launch my python app when my Linux system
boots up. At the moment I just have an entry like this in my rc.local file:

 

CD /myfolder/anotherfolder

./myapp.py

 

Is this the best way to do this? Or is there a better way? I feel like a bit
of a dummy asking this question, I just wanted to ensure the best method.

 

Thanks guys,

 

Rob

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From duncan.booth at invalid.invalid  Sun Aug 12 06:37:30 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 Aug 2007 10:37:30 GMT
Subject: Fatest standard way to sum bytes (and their squares)?
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
Message-ID: <Xns998A763EAA360duncanbooth@127.0.0.1>

Erik Max Francis <max at alcyone.com> wrote:

> So far the fastest way I've found is using the `sum` builtin and 
> generators::
> 
>      ordinalSum = sum(ord(x) for x in data)
>      ordinalSumSquared = sum(ord(x)**2 for x in data)
> 
> This is about twice as fast as an explicit loop, but since it's going to 
> be processing massive amounts of data, the faster the better.  Are there 
> any tricks I'm not thinking of, or perhaps helper functions in other 
> modules that I'm not thinking of?
> 

I haven't timed it, but at the very least I'd avoid going through all the 
data twice:

count = {}
for i in range(256):
  count[chr(i)] = 0
for x in data:
  count[x] += 1

ordinalSum = sum(ord(c)*count[c] for c in count)
ordinalSumSquared = sum(ord(c)**2 * count[c] for c in count)


From brenNOSPAMbarn at NObrenSPAMbarn.net  Sat Aug 11 13:47:08 2007
From: brenNOSPAMbarn at NObrenSPAMbarn.net (OKB (not okblacke))
Date: Sat, 11 Aug 2007 17:47:08 GMT
Subject: Augmented assignment (was Re: Something in the function tutorial
	confused me.)
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
	<m3hvi.37606$G23.6240@newsreading01.news.tds.net>
	<f9kdpq$drp$1@panix3.panix.com>
Message-ID: <Xns99896DB601AF1OKB@199.45.49.11>

Aahz wrote:

>>>>>> tup=([],)
>>>>>> tup[0] += ['zap']
>>> Traceback (most recent call last):
>>>   File "<stdin>", line 1, in <module>
>>> TypeError: 'tuple' object does not support item assignment
<snip>
> Obviously, you can easily work around it:
> 
>>>> t = ([],)
>>>> l = t[0]
>>>> l += ['foo']
>>>> t
> (['foo'],)

    	This is quite shocking to me, although after staring at the 
documentation for a while I guess I understand it.  But it seems to me 
that the documentation is somewhat misleading on this point, where it 
says:

    	"An augmented assignment evaluates the target (which, unlike normal 
assignment statements, cannot be an unpacking) and the expression list, 
performs the binary operation specific to the type of assignment on the 
two operands, and assigns the result to the original target."

    	This sentence is phrased as though it is the whole story, but it 
isn't, because the operation might not in fact wind up being an 
assignment.  Shouldn't there be an "except see below" or something 
there, to alert the reader that in some cases a true assignment doesn't 
occur?  (I realize that the exception follows quite closely on the heels 
of this sentence, but it doesn't follow immediately, and is separated by 
a paragraph break and intervening material about the parallel to 
unaugmented x = x + 1.  On initial reading my tendency is to read the 
end of the sentence quoted above, see a paragraph break and apparently 
explanatory material, and go "oh, okay, I now have the full 
specification of this syntax" when in fact I don't.)
   	
-- 
--OKB (not okblacke)
Brendan Barnwell
"Do not follow where the path may lead.  Go, instead, where there is
no path, and leave a trail."
	--author unknown


From news at sandipan.com  Tue Aug 28 21:20:13 2007
From: news at sandipan.com (Sandipan News)
Date: Tue, 28 Aug 2007 21:20:13 -0400
Subject: Pythonwin Install COM exceptions on Windows Vista Ultimate
Message-ID: <016001c7e9da$c2925220$47b6f660$@com>

What do I do? Can't do without Python!
Any experience, advice, hope is welcome.
Thanks.
Sandipan




From tuomas.vesterinen at pp.inet.fi  Sun Aug 19 13:39:44 2007
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Sun, 19 Aug 2007 17:39:44 GMT
Subject: How to find script's directory
In-Reply-To: <mailman.2163.1187529606.22759.python-list@python.org>
References: <mailman.2163.1187529606.22759.python-list@python.org>
Message-ID: <Af%xi.160$kj5.90@read3.inet.fi>

#!/usr/bin/python
# module show_my_path
# ...
import os
print 'os.path.abspath(__file__):', os.path.abspath(__file__)
# ...
# end of module

[tv at tux class]$ python
 >>> import show_my_path
os.path.abspath(__file__): /misc/proc/py/test/class/show_my_path.py
 >>>
[tv at tux class]$ python show_my_path.py
os.path.abspath(__file__): /misc/proc/py/test/class/show_my_path.py


From kylotan at gmail.com  Fri Aug 10 11:37:34 2007
From: kylotan at gmail.com (Ben Sizer)
Date: Fri, 10 Aug 2007 08:37:34 -0700
Subject: The Future of Python Threading
In-Reply-To: <87ir7n4fps.fsf@benfinney.id.au>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<87ir7n4fps.fsf@benfinney.id.au>
Message-ID: <1186760254.859080.137840@g12g2000prg.googlegroups.com>

On 10 Aug, 15:38, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> "Justin T." <jmtull... at gmail.com> writes:
> > The truth is that the future (and present reality) of almost every
> > form of computing is multi-core, and there currently is no effective
> > way of dealing with concurrency.
>
> Your post seems to take threading as the *only* way to write code for
> multi-core systems, which certainly isn't so.
>
> Last I checked, multiple processes can run concurrently on multi-core
> systems. That's a well-established way of structuring a program.

It is, however, almost always more complex and slower-performing.

Plus, it's underdocumented. Most academic study of concurrent
programming, while referring to the separately executing units as
'processes', almost always assume a shared memory space and the
associated primitives that go along with that.

> > We still worry about setting up threads, synchronization of message
> > queues, synchronization of shared memory regions, dealing with
> > asynchronous behaviors, and most importantly, how threaded an
> > application should be.
>
> All of which is avoided by designing the program to operate as
> discrete processes communicating via well-defined IPC mechanisms.

Hardly. Sure, so you don't have to worry about contention over objects
in memory, but it's still completely asynchronous, and there will
still be a large degree of waiting for the other processes to respond,
and you have to develop the protocols to communicate. Apart from
convenient serialisation, Python doesn't exactly make IPC easy, unlike
Java's RMI for example.

--
Ben Sizer



From torriem at chem.byu.edu  Wed Aug 22 00:33:53 2007
From: torriem at chem.byu.edu (Michael L Torrie)
Date: Tue, 21 Aug 2007 22:33:53 -0600
Subject: IDE for Python
In-Reply-To: <46CB81FD.5070101@bigfoot.com>
References: <mailman.55.1187690455.32294.python-list@python.org>	<1187698999.545439.322600@k79g2000hse.googlegroups.com>
	<46CB81FD.5070101@bigfoot.com>
Message-ID: <46CBBCB1.9060604@chem.byu.edu>

Ricardo Ar?oz wrote:
> Hi,
> 	Do you know if for in-house development a GPL license applies? (Qt4
> and/or Eric4).

If your programs are used in-house and never released, then you don't
have to abide by the terms of the GPL.  BUT (this is a big but) if you
ever release your code or distribute the binary, you must now do so
under the terms of the GPL, because Qt is GPL'd and your use of Qt must
follow those terms.  Another huge caveat is that Qt's proprietary
license says that you can only use the proprietary Qt libraries for
programs that you developed from the beginning with the proprietary
libraries.  In other words, you can't develop a Qt application under the
GPL and link it against the GPL'd Qt libraries and then at a later date
buy Qt and try to relicense your program under something other than the
GPL.  Note that this has nothing to do with the GPL itself, but rather
the terms of the proprietary Qt license (Qt is dual-licensed).

> 
> 



From crobc at BOGUS.sbcglobal.net  Fri Aug 10 23:36:58 2007
From: crobc at BOGUS.sbcglobal.net (CC)
Date: Fri, 10 Aug 2007 20:36:58 -0700
Subject: Hex editor - Python beginner's code open to review
Message-ID: <f9jasr021hs@news1.newsguy.com>

Hi:

http://web.newsguy.com/crcarl/python/hexl.py

This is my first Python program other than tutorial code snippet 
experimentation.  I chose a hex line editor.  I may do a hex screen 
editor once this is done, if I feel like playing with the curses module. 
  Or move straight to wxPython.

This is unfinished, and is really just a hex viewer at this point.  It 
seems like a good point to stop and see what others think.  I would be 
interested to hear any comments.

My command parsing if of course crude, brute-force, and not very 
scalable.  I am doing some reading on this subject, and will be trying 
to do a more generalized approach in the next revision.  This is going 
to be a subject where I need to learn a lot, because I have 2-3 
embedded applications in C that need varying levels of command parsers, 
so I will be seeking to improve this skill considerably.

Thanks for input.



-- 
_____________________
Christopher R. Carlen
crobc at bogus-remove-me.sbcglobal.net
SuSE 9.1 Linux 2.6.5


From grante at visi.com  Wed Aug 29 13:04:50 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 29 Aug 2007 17:04:50 -0000
Subject: Gmane's been quiet ...
References: <mailman.88.1188343014.28954.python-list@python.org>
	<1i3l2k9.1j3tdgr1iz19yeN%raims@dot.com>
	<13d9l0f1i2erdc6@corp.supernews.com>
	<1i3lsqu.10ti61g1fs47osN%raims@dot.com>
	<mailman.97.1188384559.28954.python-list@python.org>
	<m1lkbu2t0w.fsf@chezmarshall.freeserve.co.uk>
Message-ID: <13db9pilav24qc2@corp.supernews.com>

On 2007-08-29, Robert Marshall <spam at chezmarshall.freeserve.co.uk> wrote:

>> Given that I have now read a reply to my post-via-gmane on gmane
>> before seeing the original post appear there I shall assume they've
>> been having some sort of issue.
>
> See http://news.gmane.org/gmane.discuss for some discussion of this...

A day's worth of e-mail messages was lost (both incoming and
outgoing apparently).

-- 
Grant Edwards                   grante             Yow! In Newark the
                                  at               laundromats are open 24
                               visi.com            hours a day!


From cai.haibin at gmail.com  Thu Aug  2 02:32:11 2007
From: cai.haibin at gmail.com (james_027)
Date: Thu, 02 Aug 2007 06:32:11 -0000
Subject: a dict trick
Message-ID: <1186036331.304916.304020@e9g2000prf.googlegroups.com>

hi

for example I have this dictionary

dict = {'name':'james', 'language':'english'}

value = 'sex' in dict and dict['sex'] or 'unknown'

is a right pythonic of doing this one? I am trying to get a value from
the dict, but if the key doesn't exist I will provide one.

THanks
james



From QJing.Li at gmail.com  Fri Aug 17 21:11:16 2007
From: QJing.Li at gmail.com (math2life)
Date: Sat, 18 Aug 2007 01:11:16 -0000
Subject: How to setup pyOpenGL3.0.a6 for window xp?
In-Reply-To: <1187397743.937458.301590@q3g2000prf.googlegroups.com>
References: <1187395670.267971.88750@q4g2000prc.googlegroups.com>
	<1187397743.937458.301590@q3g2000prf.googlegroups.com>
Message-ID: <1187399476.786098.144440@x35g2000prf.googlegroups.com>

On Aug 17, 5:42 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> On Aug 17, 8:07 pm, math2life <QJing... at gmail.com> wrote:
>
> > Hi,
> > I've already download the pyOpenGL3..0.a6 for python2.4 and installed
> > python2.4,
>
> > Is it necessary to install OpenGL? And if need,  which version of
> > OpenGL should be
> > installed?
>
> Windows comes with OpenGL libraries.  However, before you can use
> OpenGL you'll need a package that can provide an OpenGL context, which
> PyOpenGL doesn't do (easily).
>
> PyGame is the typical choice for most uses.  If all you need is a
> simple window to draw on, this is the package you want.
>
> However, it doesn't (easily) work with common GUIs like GTK and Wx.
> If you want to use use OpenGL in a GUI app, then you'll want to find
> an "OpenGL canvas widget" for that GUI.
>
> Carl Banks

ye!I made it.
The OpenGL context should be pre-installed.

I want  PyOpenGL can work with Wx, but it is good idea to start with
PyGame for the newbie to OpenGL.

Thank you , Carl



From colin.mcfarlane at cgi.com  Fri Aug  3 11:14:02 2007
From: colin.mcfarlane at cgi.com (Colly)
Date: Fri, 03 Aug 2007 08:14:02 -0700
Subject: How to log python Shell results
Message-ID: <1186154042.876531.47100@k79g2000hse.googlegroups.com>

How do I output the IDLE 1.2.1 Python Shell results to a log file.



From zzbbaadd at aol.com  Thu Aug 30 14:23:19 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Thu, 30 Aug 2007 11:23:19 -0700
Subject: list index()
In-Reply-To: <slrnfde2ei.1ek.horpner@FIAD06.norwich.edu>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<slrnfde2ei.1ek.horpner@FIAD06.norwich.edu>
Message-ID: <1188498199.557521.31700@z24g2000prh.googlegroups.com>

Neil, Steve,

Thanks for the responses on sets. I have not used them before and was
not even aware Python had them. I will try them out.




From robert.kern at gmail.com  Fri Aug 17 17:29:16 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 17 Aug 2007 14:29:16 -0700
Subject: Array and floating point
In-Reply-To: <1187384816.251783.95410@19g2000hsx.googlegroups.com>
References: <1187384816.251783.95410@19g2000hsx.googlegroups.com>
Message-ID: <fa53vc$lbl$1@sea.gmane.org>

Jonathan Shan wrote:
> Hello,
> 
> I'm experiencing a problem where the float being appended to the array
> is not the same as the result of the appending.
> 
>>>> from array import *
>>>> x = array('f')
>>>> x.append(float("0.1"))
>>>> x[0]
> 0.10000000149011612
>>>> float("0.1")
> 0.10000000000000001
> 
> I'm expecting x[0] = 0.10000000000000001

'f' denotes a single-precision floating point number. Python's float objects are
 double-precision floating point numbers. Use 'd' instead.

-- 
Robert Kern

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



From claird at lairds.us  Tue Aug  7 09:43:12 2007
From: claird at lairds.us (Cameron Laird)
Date: Tue, 7 Aug 2007 13:43:12 +0000
Subject: Issues of state (was: Tkinter or wxpython?)
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1680.1186416061.22759.python-list@python.org>
	<7x3aywr4tc.fsf@ruckus.brouhaha.com>
	<mailman.1684.1186422197.22759.python-list@python.org>
Message-ID: <gg9mo4-p2m.ln1@lairds.us>

In article <mailman.1684.1186422197.22759.python-list at python.org>,
Chris Mellon <arkanes at gmail.com> wrote:
			.
		[scores of lines
		of vigorous debate]
			.
			.
>Moreover, if you *don't* need global access or zero-deployment
>(zero-deployment is always nice but most environments where you can
>reasonably force a specific browser and version also have IT
>infrastructure), then you should ask yourself if forcing your
>application in the web app model (I haven't even touched on the whole
>stateless HTTP being mapped to a stateful environment issue, or the
>need to manage the local web server) actually buys you anything. I
			.
			.
			.
Go ahead:  touch on statefulness.  I've been pondering the topic
lately, and wonder what's new on the subject.  I find it plenty
difficult to cast this as anything but a big liability for the
Web app team.


From mccredie at gmail.com  Fri Aug 24 17:32:52 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Fri, 24 Aug 2007 14:32:52 -0700
Subject: Problem w/ Tkinter
In-Reply-To: <eb79828c0708241400n7d83028eh5ae4a2dd4c463f06@mail.gmail.com>
References: <eb79828c0708241400n7d83028eh5ae4a2dd4c463f06@mail.gmail.com>
Message-ID: <9e95df10708241432t2b974bd8n1168672cadaace22@mail.gmail.com>

> text="Action?",command=self.V(a,b,c,d)).pack(anchor=W) doesn't even do
> anything, what can I do to fix this problem?

I see many mistakes.

First: `command=self.V(a,b,c,d)' is actually calling self.V. You don't
want to call self.V, which will assing `command' to the return value,
you want to pass self.V itself.

Also, here:
[code]
a = Radiobutton(choices, text="Add News", variable=v,value=1).pack(anchor=W)
 ...
[/code]

You are assigning a, b, c and d to the return value of `pack' which is
None. You do the same thing with the Button.

Also, V (well, callbacks in general) can't take any parameters.
V is checking a,b,c and d which, if done correctly, would be instances
of Radiobutton. Directly comparing them against an empty string won't
work.

How to fix your code?

Read this: http://docs.python.org/tut/
Then this: http://www.pythonware.com/library/tkinter/introduction/
Also, this might help: http://www.python.org/dev/peps/pep-0008/

Matt


From aahz at pythoncraft.com  Sat Aug 11 09:23:47 2007
From: aahz at pythoncraft.com (Aahz)
Date: 11 Aug 2007 06:23:47 -0700
Subject: Finding gurus (was Re: Something in the function tutorial confused
	me.)
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<mailman.1737.1186577596.22759.python-list@python.org>
	<5hv705F3mk67nU1@mid.individual.net>
	<1i2nhnv.2y00l5173lfbbN%aleax@mac.com>
Message-ID: <f9kd93$lg8$1@panix3.panix.com>

In article <1i2nhnv.2y00l5173lfbbN%aleax at mac.com>,
Alex Martelli <aleax at mac.com> wrote:
>
>Because of this, a Google search for
>
>  "<name> <surname>" python
>
>may sometimes help; when you get 116,000 hits, as for "Steve Holden"
>python, that may be a reasonable indication that the poster is one of
>the world's Python Gurus (in fact, the winner of the 2007 Frank WIllison
>Award -- congratulations, Steve!!!).

Sometimes that precise search pattern isn't appropriate, of course.  ;-)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"And if that makes me an elitist...I couldn't be happier."  --JMS


From dogatemycomputer at gmail.com  Mon Aug 20 15:26:07 2007
From: dogatemycomputer at gmail.com (dogatemycomputer at gmail.com)
Date: Mon, 20 Aug 2007 19:26:07 -0000
Subject: Handwriting Recognition
In-Reply-To: <mailman.6.1187635870.32294.python-list@python.org>
References: <mailman.6.1187616526.26576.python-list@python.org>
	<1187635063.531103.7610@d55g2000hsg.googlegroups.com>
	<mailman.6.1187635870.32294.python-list@python.org>
Message-ID: <1187637967.915548.53240@k79g2000hse.googlegroups.com>


> > import handwriting
> > ...
>
> >http://docs.python.org/lib/module-handwriting.html
>
> > ha ha, I kid, I kid.
>
> > I don't think this is an easy problem to solve.  You'd probably want
> > Python to be a wrapper around whatever hand-writing recognition
> > software you find or buy.  I know handwriting recognition software can
> > read the hand-writing on checks, so that may be a starting point.
>

I once had someone explain to me how this actually works from a purely
mathematical standpoint and the topic was fascinating.  Unfortunately
most of the math went straight over my head and, in the end, it was
explained to me that math itself is the problem.  Handwriting (and
almost any other uncontrolled input) is usually emotional, not logical
in the strictest sense (which is why handwriting experts can tell a
great deal about a person from the handwriting).  If you can mimic
handwriting (or any emotional) input in a mathematical expression then
you wouldn't be far from playing "god".

This was the only thing I could find that may be helpful to you:

http://sourceforge.net/projects/tomoe/

This includes a "stroke editor" and an engine which may suit your
needs.  Hope this helps..

Good luck!



From hd7456 at hotmail.com  Mon Aug 20 10:23:28 2007
From: hd7456 at hotmail.com (HD1956)
Date: Mon, 20 Aug 2007 14:23:28 -0000
Subject: Newbee Question
Message-ID: <fac850+2m5c@eGroups.com>

This is probably a simple code. I am a truck driver who gets paid by 
stops and cases. I am trying to figure out how to code my stop pay. I 
get 40 cents per stop up to 22 stops, and $1.40 per stops after that. 



From seventhhs at gmail.com  Sat Aug 25 04:19:53 2007
From: seventhhs at gmail.com (J. A. Aczel)
Date: Sat, 25 Aug 2007 01:19:53 -0700
Subject: How to find parent function/class of generators?
Message-ID: <b410cefd0708250119p7b4080e0v186967c0ef60f720@mail.gmail.com>

Hello all. I think I should explain my problem in detail, so everyone
understands what I'm trying to do and why. There may be a better
approach to the whole problem then I am using.

I am working on a game, with most of my AI code & such divided up into
generator functions (really coroutines that don't take any input)
stored in a dictionary called Director.tasks, and handled by a simple
cooperative multitasking engine. The dictionary key is the generator
object to be advanced, and the value is the frame number at which it
should next be executed. The generator objects yield the delay before
their next execution.

    def realtick(self):
        Director.frame += 1
        for task in Director.tasks.items():
            if task[1] <= Director.frame:
                try:
                    result = task[0].next()
                    if result == -1:
                        Director.tasks.pop(task[0])
                    else:
                        Director.tasks[task[0]] = Director.frame + result
                except:
                    Director.tasks.pop(task[0])

Why did I use a dictionary? Originally I had a list of lists, but I
thought converting it to a dictionary would make removing tasks from
the queue easier, the main difficulty I'm having. But it didn't,
because I can't identify the

Due to the framework I'm using, I think (or possibly just the Python
language?) in-game objects aren't actually destroyed when they're
removed from the game world. Thus, when an enemy or something with
associated tasks 'dies', the tasks merrily continue executing... and
the game will have a bunch of enemies who no longer have sprites,
movement abilities or collision checks, but otherwise are none the
worse for wear for having been destroyed. It's a big mess. So I need a
way to remove all tasks associated with a game object from the queue,
upon the object's  'destruction'.

Unfortunately, generator objects don't seem to include any information
about the parent object or function that created them. I ran the dir()
builtin on a sample generator object, created from an object method,
and got this:
['__class__', '__delattr__', '__doc__', '__getattribute__',
'__hash__', '__init__', '__iter__', '__new__', '__reduce__',
'__reduce_ex__', '__repr__', '__setattr__', '__str__', 'close',
'gi_frame', 'gi_running', 'next', 'send', 'throw']

__class__ just contains <type 'generator'>. If __doc__'s the
docstring, I suppose I could use that to identify the generator
object, but it seems hackish.... nothing else in that list looks
likely. Is this python's message to me that I'm abusing generators for
entirely the wrong purpose? In any case, since I can't figure out how
to determine which generator object corresponds to which game object,
I'm stuck.

I'd appreciate any pointers or suggestions. :) I might have missed
something very obvious, since I'm no pythonista and have generally
been working on this in short spurts late at night. If so, sorry for
making you read all of this!


From __peter__ at web.de  Tue Aug 21 12:15:53 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 21 Aug 2007 18:15:53 +0200
Subject: How to optimise this code?
References: <mailman.68.1187711977.32294.python-list@python.org>
Message-ID: <faf33r$rb8$01$1@news.t-online.com>

David N Montgomery wrote:

> class testCase:
>     def __init__(self, tc):
>         if tc == 1:self.testCase1()
>         if tc == 2:self.testCase2()
>         if tc == 3:self.testCase3()
>         if tc == 4:self.testCase4()
>         if tc == 5:self.testCase5()
>         if tc == 6:self.testCase6()
> 
>     def testCase1(self):
>         print "tc1"
> 
>     def testCase2(self):
>         print "tc2"
> 
>     def testCase3(self):
>         print "tc3"
> 
>     def testCase4(self):
>         print "tc4"
> 
>     def testCase5(self):
>         print "tc5"
> 
>     def testCase6(self):
>         print "tc6"
> 
> 
>     def testCaseX(self):
>         print "tcX"
> 
> totalNumberOfTestCases = 6
> x = 0
> while x <= totalNumberOfTestCases:
>     x += 1
>     testCase(x)
> 
> 
> This template code is working, but I envisage having 100+ test cases and
> am concerned about my useage of if statements. I would be grateful for
> any pointers as to how I can run all tests cases, regardless of how
> many, in a more efficient manner.

Have a look at the unittest module in the standard library

http://docs.python.org/lib/module-unittest.html

It can do the bookkeeping for you:

>>> import unittest
>>> class TestCase(unittest.TestCase):
...     def testCase1(self):
...             print "first"
...     def testCaseN(self):
...             print "last"
...
>>> unittest.main()
first
.last
.
----------------------------------------------------------------------
Ran 2 tests in 0.001s

OK

Peter


From http  Thu Aug 30 03:57:11 2007
From: http (Paul Rubin)
Date: 30 Aug 2007 00:57:11 -0700
Subject: Creating a multi-tier client/server application
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
Message-ID: <7xy7ft4fqg.fsf@ruckus.brouhaha.com>

Jeff <jeff.fw at gmail.com> writes:
> I was really hoping to avoid an entirely web-based app, for a few
> reasons, not the least of which is that I've been working almost
> entirely on web apps for the past few years, and I am getting mighty
> sick of it.

If you've done any gui programming, you'll know that it's even more
tedious and time-consuming than web programming.  At least the way I
do web stuff, I'm a back-end coder so I slap together a usable
interface with crude html (the only kind I know), then let a real web
designer handle making it look nice (that person doesn't have to be a
programmer).  It's relatively easier to get someone like that involved
in a project than someone who can do good visual stuff AND write code,
as is (to some extent) needed for a client side GUI.

> But I'd really like to try something different.

A year-long mission critical project is not the time or place to try
something different.  Better start with something easier.

> Some reasons for them would be (in no particular order): 1) More
> responsive and user-friendly interfaces, 2) Much better ability to
> sort, export, import, and print data (very important), 3) Easier to
> "lock down" who's using the program by only installing it on certain machines.

1) is true in principle and but a heck of a lot of apps don't really
use the capability.  There's tons of crappy gui apps out there that
could be done just as well with no client installation.  

2) I don't understand this part.  Sort = server side.
Export/import/printing: upload and download files?  Depending on your
requirements a little bit of browser scripting may be enough to handle
this.  3) I don't agree with this at all, and if you were trying to
pitch your project to me I'd be asking you a lot of questions about
security, in particular whether you're up to integrating SSL into both
your server and client, as well as they're already integrated into
existing browsers and http servers, which were written by experts and
have had tons of review and testing, yet problems still occasionally
turn up with them.  (Hmm, maybe you could use something like stunnel,
yet another client install.)  Since you're handling personal and
financial info maybe you should be using multi-factor authentication
(hardware tokens with client certificates) and browsers already handle
the client side of that (Windows CAPI in Explorer or PKCS#11 plugin
for Firefox).

> usability of a desktop app is rather frightening.  I've done plenty of
> stuff with AJAX, and it certainly has its purpose, but it gets
> incredibly bloated and fragile *very* quickly.

Yes I agree with this.  There are multiple judgement calls as to 1)
when the maintenance tradeoff starts tilting towards a thick client vs
AJAX when you need certain interface features that can be done either
way; and 2) whether you REALLY need those features.  Again, if you
were trying to pitch this project to me, I'd want to see some sample
screen designs with a persuasive argument that their functions
couldn't be done as effectively in html, if necessary using a small
java applet or embedded browser plug-in to handle stuff like file i/o
or whatever.

> My manager even wants use cases (if you've never had to deal with
> use cases, consider yourself a lucky, lucky person) which I am going
> to attempt to argue as that is even going *too* far.

You definitely need use cases.  You should also put together some
sample screens to figure out the user interactions.  You won't be
surprised to hear that I usually do those in html.

> So, long story short (too late), no Extreme Programming for me.

I'm not a real adherent of Extreme Programming (abbreviated XP, not to
be confused with Windows XP) like some folks on this newsgroup are,
but some of its ideas are worth studying.  In particular, doing
bite-sized incremental development with very frequent interaction with
the customer, letting them try out new code as the implementation
progresses, can save you from surprises.


From gagsl-py2 at yahoo.com.ar  Wed Aug 22 11:15:16 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 22 Aug 2007 08:15:16 -0700
Subject: Chaining programs with pipe
In-Reply-To: <13cogr3n6no937b@corp.supernews.com>
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
	<13cnbi87neru8c3@corp.supernews.com>
	<mailman.97.1187757319.32294.python-list@python.org>
	<13cogr3n6no937b@corp.supernews.com>
Message-ID: <1187795716.083417.299540@q4g2000prc.googlegroups.com>

On 22 ago, 11:08, Grant Edwards <gra... at visi.com> wrote:

> but I'm a Unix guy who occasionally tries
> to ship a Windows version of a Python app: the concept of a

Ah, that explains your previous post telling that things on Windows
don't work as they "should". They work, but not necesarily as a
"foreigner" would expect.

--
Gabriel Genellina



From seandavi at gmail.com  Tue Aug 14 15:27:47 2007
From: seandavi at gmail.com (Sean Davis)
Date: Tue, 14 Aug 2007 19:27:47 -0000
Subject: Fast kNN from python
In-Reply-To: <1187086584.076990.260680@r34g2000hsd.googlegroups.com>
References: <1187086584.076990.260680@r34g2000hsd.googlegroups.com>
Message-ID: <1187119667.134926.253150@22g2000hsm.googlegroups.com>

On Aug 14, 6:16 am, Janto Dreijer <jan... at gmail.com> wrote:
> Hi!
>
> I am looking for a Python implementation or bindings to a library that
> can quickly find k-Nearest Neighbors given an arbitrary distance
> metric between objects. Specifically, I have an "edit distance"
> between objects that is written in Python.
>
> I haven't looked at the methods in detail but I think I'm looking for
> one of the data structures listed onhttp://en.wikipedia.org/wiki/Metric_trees
> (i.e. vp-trees, cover trees, m-trees or bk trees). But I might be
> wrong. An approximate kNN would also work.
>
> If there doesn't exist such an implementation yet, any advice on a
> library I can wrap myself would also be appreciated.
>
> Thanks!
> Janto

Have you looked at using Rpy and R?  There are probably several knn
implementations that then become accessible to you (although I haven't
checked recently).

Sean




From byte8bits at gmail.com  Fri Aug 10 12:12:17 2007
From: byte8bits at gmail.com (brad)
Date: Fri, 10 Aug 2007 12:12:17 -0400
Subject: The Future of Python Threading
In-Reply-To: <f9i2ks$3m3$1@solaris.cc.vt.edu>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<f9i2ks$3m3$1@solaris.cc.vt.edu>
Message-ID: <f9i2rt$3nq$1@solaris.cc.vt.edu>

brad wrote:

> This is all anecdotal... threads in Python work great for me. I like 
> Ruby's green threads too,

I forgot to mention that Ruby is moving to a GIL over green threads in v2.0


From dogatemycomputer at gmail.com  Wed Aug 22 17:07:02 2007
From: dogatemycomputer at gmail.com (dogatemycomputer at gmail.com)
Date: Wed, 22 Aug 2007 21:07:02 -0000
Subject: Learning Python using a book based on version 1.5
In-Reply-To: <mailman.138.1187815581.32294.python-list@python.org>
References: <1187814437.775758.159510@e9g2000prf.googlegroups.com>
	<mailman.138.1187815581.32294.python-list@python.org>
Message-ID: <1187816822.193686.326660@e9g2000prf.googlegroups.com>



> http://docs.python.org/tut/http://www.diveintopython.org/

I'm dense so the online python docs make great sources for reference
points and they help clarify ambiguity but its too dry (without enough
sample code) to help me fully understand the concepts.

I think Dive Into Python would probably be a better choice.  I'll
pickup the book this weekend!

Thanks for the help!!





From AnonMail2005 at gmail.com  Fri Aug 31 16:27:27 2007
From: AnonMail2005 at gmail.com (AnonMail2005 at gmail.com)
Date: Fri, 31 Aug 2007 13:27:27 -0700
Subject: Registering a python function in C
In-Reply-To: <1188588784.764658.317570@r34g2000hsd.googlegroups.com>
References: <1188508874.879215.319400@i13g2000prf.googlegroups.com>
	<1188516423.744038.309700@z24g2000prh.googlegroups.com>
	<1188588784.764658.317570@r34g2000hsd.googlegroups.com>
Message-ID: <1188592047.542946.249520@57g2000hsv.googlegroups.com>

On Aug 31, 3:33 pm, fernando <fernandofariajun... at gmail.com> wrote:
> Thanks for the responses. To be more specific, this code is part of a
> Maya plugin. The funcion MFnPlugin::registerUI takes a pointer to a
> PyObject which is the function that will set up the UI for that
> plugin. The code Matimus posted seems to me exactly like what I need
> to do, except that maya gives me an error when I call
> PyImport_ImportModule... I don't even have a chance to check the
> return value, Maya simply gives up. I have checked that python is
> initialized by the time I call this function, and the python path is
> correct, I can load the module from the maya python interpreter. What
> bugs me is that PyImport_ImportModule doesn't even return, it should
> return 0 if something bad happened, right?
>
> Here's my code:
>
> if(Py_IsInitialized())
>      cout << "python is already initialized" << endl;
> if(!Py_IsInitialized()){
>      cout << "had do initialize python" << endl;
>      Py_Initialize();}
>
> PyObject* mod= PyImport_ImportModule("vzPyTest");
> if(mod == 0){
>      cout << "didn't load" << endl;}
>
> PyObject* func1 = PyObject_GetAttrString(mod, "vzPyTest.test1");
> PyObject* func2 = PyObject_GetAttrString(mod, "vzPyTest.test2");
> plugin.registerUI(func1, func2);
>
> Thanks for the help!!!
One thing I've learned is that the C interface can be tricky the first
time.

Is Maya a different python build than what is contained at python.org?
If so, I suggest you get your C program to work with the latest python
build
from python.org.  Then see if you can get it to work with the Maya
version.



From arkanes at gmail.com  Wed Aug  8 09:58:50 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 8 Aug 2007 08:58:50 -0500
Subject: Seek the one billionth line in a file containing 3 billion lines.
In-Reply-To: <874pja70p5.fsf@benfinney.id.au>
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
	<7xzm12o7o7.fsf@ruckus.brouhaha.com>
	<1186555297.877273.40540@o61g2000hsh.googlegroups.com>
	<874pja70p5.fsf@benfinney.id.au>
Message-ID: <4866bea60708080658l170bd9eevd86cf58dbc1eddd8@mail.gmail.com>

On 8/8/07, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> Sullivan WxPyQtKinter <sullivanz.pku at gmail.com> writes:
>
> > On Aug 8, 2:35 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> > > Sullivan WxPyQtKinter <sullivanz.... at gmail.com> writes:
> > > > This program:
> > > > for i in range(1000000000):
> > > >       f.readline()
> > > > is absolutely every slow....
> > >
> > > There are two problems:
> > >
> > >  1) range(1000000000) builds a list of a billion elements in memory
> [...]
> > >
> > >  2) f.readline() reads an entire line of input
> [...]
> >
> > Thank you for pointing out these two problem. I wrote this program
> > just to say that how inefficient it is to use a seemingly NATIVE way
> > to seek a such a big file. No other intention........
>
> The native way isn't iterating over 'range(hugenum)', it's to use an
> iterator. Python file objects are iterable, only reading eaach line as
> needed and not creating a companion list.
>
>     logfile = open("foo.log", 'r')
>     for line in logfile:
>         do_stuff(line)
>
> This at least avoids the 'range' issue.
>
> To know when we've reached a particular line, use 'enumerate' to
> number each item as it comes out of the iterator.
>
>     logfile = open("foo.log", 'r')
>     target_line_num = 10**9
>     for (line_num, line) in enumerate(file):
>         if line_num < target_line_num:
>             continue
>         else:
>             do_stuff(line)
>             break
>
> As for reading each line: that's unavoidable if you want a specific
> line from a stream of variable-length lines.
>

The minimum bounds for a line is at least one byte (the newline) and
maybe more, depending on your data. You can seek() forward the minimum
amount of bytes that (1 billion -1) lines will consume and save
yourself some wasted IO.


From ca.allen at gmail.com  Wed Aug 29 15:11:54 2007
From: ca.allen at gmail.com (Chris Allen)
Date: Wed, 29 Aug 2007 12:11:54 -0700
Subject: sys.argv is munging my command line options
Message-ID: <1188414714.645724.63330@i38g2000prf.googlegroups.com>

The command line syntax for my program is as follows:

action key=value key=value...

Where action is a required string (ie. 'backup', 'init', 'restore',
etc) and the program can accept one or more key value pairs.  I know
this syntax isn't standard, but I think it works great for my program
as each key can override an identically named field in a configuration
file, that way the user doesn't have to have two different syntaxes to
do the same thing.  I could do this with --key value, but key=value is
cleaner IMHO because it matches the config file syntax.

But I'm running into a problem with this which is that sys.argv splits
my key=value options.  I need to know the option associations, and
there's no way to know this by inspecting sys.argv.  Can I get access
to the command line string as python saw it before it split it into
sys.argv or is there another way?  Thanks.



From paul at boddie.org.uk  Wed Aug 22 11:10:12 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 22 Aug 2007 08:10:12 -0700
Subject: Where we need to use Python ?
In-Reply-To: <mailman.115.1187793425.32294.python-list@python.org>
References: <1187596936.136499.200280@l22g2000prc.googlegroups.com>
	<46cc26ed$0$432$426a74cc@news.free.fr>
	<mailman.115.1187793425.32294.python-list@python.org>
Message-ID: <1187795412.348850.86720@m37g2000prh.googlegroups.com>

On 22 Aug, 16:36, "Terry Reedy" <tjre... at udel.edu> wrote:
> |"Bruno Desthuilliers" Terry Reedy a ?crit :
> |Hahem... "proprietary" is certainly not the right term here.

[...]

> In any case, CPython is owned by PSF (which gives it away).  Its bytecode
> is an private implementation detail subject to change in any .x version as
> the developers see fit.

Yes, but it's not like the PSF are going to initiate legal action
against anyone who implements an interpreter for similar bytecode,
which is what has happened for things like CPU instruction sets in the
past. CPython bytecode is best described as "implementation-specific",
thus avoiding any words with exclusive ownership connotations.

Paul



From zyzhu2000 at gmail.com  Fri Aug 17 09:43:00 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Fri, 17 Aug 2007 13:43:00 -0000
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <mailman.2097.1187323388.22759.python-list@python.org>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<fa2m4s$k1g$1@daisy.noc.ucla.edu>
	<1187311999.880853.135780@j4g2000prf.googlegroups.com>
	<mailman.2091.1187317979.22759.python-list@python.org>
	<1187320510.165621.224150@l22g2000prc.googlegroups.com>
	<mailman.2097.1187323388.22759.python-list@python.org>
Message-ID: <1187358180.953643.213120@i13g2000prf.googlegroups.com>

On Aug 16, 11:02 pm, "Carsten Haese" <cars... at uniqsys.com> wrote:
> On Fri, 17 Aug 2007 03:15:10 -0000, beginner wrote
>
> > On Aug 16, 9:32 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> > > What is the best solution in Perl need not be the best solution in
> > > Python. In Python you should just use a tuple as your dict key, i.e.
> > > a[k1,k2] = v, unless you have some other constraints you're not telling
> > > us.
>
> > > HTH,
>
> > > --
> > > Carsten Haesehttp://informixdb.sourceforge.net
>
> > I use tuples this way all the time. It is indeed very neat.  But it
> > is not a replacement for double hash-table.  If I want to retrieve
> > information just by K1, it is not efficient to index on (K1, K2).
>
> If you have to look up all values associates with k1 and any k2, you're right,
> that's not efficient. That would fall under "other constraints you're not
> telling us." I'm not a mind reader.
>
> -Carsten

Yeah, I should have mentioned that I actually want to group the data
by K1 and then by K2.



From mbitten73 at yahoo.com  Thu Aug  9 21:46:31 2007
From: mbitten73 at yahoo.com (Matt Bitten)
Date: Fri, 10 Aug 2007 01:46:31 -0000
Subject: wxPython - drawing without paint event
Message-ID: <1186710391.148396.113490@d30g2000prg.googlegroups.com>

I've got a wxPython program that needs to do some drawing on a DC on a
regular basis, whether or not a paint event happens. I know how to
make a ClientDC to do the drawing in, and I know what drawing calls to
make. But how do I make it all happen? After I call MainLoop, none of
my code gets called unless there is an event. And there is no event,
so my code doesn't get called. What do I do?



From deets at nospam.web.de  Thu Aug  2 17:07:12 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 02 Aug 2007 23:07:12 +0200
Subject: python 3.0, pywin32 and scipy
In-Reply-To: <mailman.1534.1186085017.22759.python-list@python.org>
References: <mailman.1534.1186085017.22759.python-list@python.org>
Message-ID: <5hevcaF3kia6jU1@mid.uni-berlin.de>

Jean-Paul Calderone schrieb:
> On Thu, 02 Aug 2007 21:16:04 +0200, "Diez B. Roggisch" 
> <deets at nospam.web.de> wrote:
>> vml schrieb:
>>> Hello,
>>>
>>>
>>> I am trying to promote python in my job, my collegue only see matlab
>>> and microsoft scripting language.
>>> I understood that there willl be no backward compatibility between
>>> python 2.x and 3.0, does it means that:
>>>
>> [snip]
>>
>> You mean C#, the language that has seen 3 major revisions in the last 6
>> years of existence, with C# 3 being announced already? And the .NET SDK,
>> that happily strode along with that? Compared to python, that has been
>> started in 1991 and now approaches it's third incarnation, I'd say
>> python has a record of steadiness that surpasses that of MS-based tools
>> by any means.
> 
> This is not a valid comparison.  In fact, C# 3 is completely backwards
> compatible with C# 2, just as C# 2 was backwards compatible with C# 1.

Does that also apply to the SDK?

Diez


From deets at nospam.web.de  Thu Aug  9 02:46:07 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 09 Aug 2007 08:46:07 +0200
Subject: how to get output.
In-Reply-To: <mailman.1777.1186641317.22759.python-list@python.org>
References: <mailman.1777.1186641317.22759.python-list@python.org>
Message-ID: <5hvrhhF3m15c7U1@mid.uni-berlin.de>

indu_shreenath schrieb:
> Hey,
> I want to get the output of "DIR /AD /B" command to a varriable using 
> python. How can I do this?

Using the subprocess-module.


However, I'm not sure what DIR /AD /B does - but there are many 
functions in module os that might deliver what you want without invoking 
an external command.

Diez


From vasudevram at gmail.com  Sun Aug  5 13:22:21 2007
From: vasudevram at gmail.com (vasudevram)
Date: Sun, 05 Aug 2007 17:22:21 -0000
Subject: the one python book
In-Reply-To: <1186332204.704307.143440@i13g2000prf.googlegroups.com>
References: <mailman.1611.1186233912.22759.python-list@python.org>
	<1186332204.704307.143440@i13g2000prf.googlegroups.com>
Message-ID: <1186334541.408225.265770@e9g2000prf.googlegroups.com>

> On Aug 4, 7:23 am, "dhr" <dima.hris... at gmail.com> wrote:
>
> > newbie question:
>
> > Is there a 'K&R" type of Python book? The book that you'd better have on
> > your shelf if you are going into Python?
>

Python in a Nutshell, the Python Cookbook and Programming Python are
all very good, IMO. Programming Python comes with a CD of all the
source code in the book (at least the 2nd edition did, as well as
Python language - this can save you some time keying in the examples.
Of course, many of the O'Reilly books (and all 3 of these are from
O'Reilly) have links to downloadable source code from them. Just
Google for the name of the book, then in the results, hit the
appropriate link to the O'Reilly site for the book, and look down the
page for the link to the examples' source.

Or (for Programming Python):

http://www.oreilly.com/catalog/python2/
http://www.oreilly.com/catalog/python3/

Vasudev
============================================================
"1 person in 100 understand binary. The other 11 don't."
Vasudev Ram
Biz site: http://www.dancingbison.com
Blog: http://jugad.livejournal.com
PDF creation/construction toolkit:
  http://sourceforge.net/projects/xtopdf
============================================================




From vodela.sai at gmail.com  Sat Aug  4 04:27:05 2007
From: vodela.sai at gmail.com (Rohan)
Date: Sat, 04 Aug 2007 08:27:05 -0000
Subject: Auto run/Timer
Message-ID: <1186216025.768369.240570@j4g2000prf.googlegroups.com>

Hello,
I would like my script to run once a week with out any external
interference.
More like a timer. Can it be done in python or should some other shell
scripting be used.
If anyone knows anything please let me know.



From steve at holdenweb.com  Sat Aug 18 21:18:17 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 18 Aug 2007 21:18:17 -0400
Subject: How to call module functions inside class instance functions?
In-Reply-To: <1187484041.838615.259980@e9g2000prf.googlegroups.com>
References: <1187484041.838615.259980@e9g2000prf.googlegroups.com>
Message-ID: <fa85oh$mb2$1@sea.gmane.org>

beginner wrote:
> Hi Everyone,
> 
> I have encountered a small problems.  How to call module functions
> inside class instance functions? For example,  calling func1 in func2
> resulted in a compiling error.
> 
> "my module here"
> 
> def func1():
>      print "hello"
> 
> class MyClass:
>    def func2():
>          #how can I call func1 here.
>          func1() #results in an error
> 
If you had bothered to include the error message it would have been 
obvious that the problem with your code isn't in body of the method at 
all - you have failed to include an argument to the method to pick up 
the instance on which the method is called. I am guessing that when you 
create an instance and call its func2 method you see the message

Traceback (most recent call last):
   File "test07.py", line 12, in <module>
     myInstance.func2()
TypeError: func2() takes no arguments (1 given)

which would have been a very useful clue. Please include the traceback 
in future! Here's a version of your program that works.

sholden at bigboy ~/Projects/Python
$ cat test07.py
"my module here"

def func1():
      print "hello"

class MyClass:
    def func2(self):
          #how can I call func1 here.
          func1() #results in an error

myInstance = MyClass()
myInstance.func2()

sholden at bigboy ~/Projects/Python
$ python test07.py
hello

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From db3l.net at gmail.com  Wed Aug 29 08:31:12 2007
From: db3l.net at gmail.com (David Bolen)
Date: Wed, 29 Aug 2007 08:31:12 -0400
Subject: Unable to read large files from zip
References: <mailman.92.1188349863.28954.python-list@python.org>
	<slrnfdain8.aai.nick@irishsea.home.craig-wood.com>
Message-ID: <m2absah69b.fsf@valheru.db3l.homeip.net>

Nick Craig-Wood <nick at craig-wood.com> writes:

> Kevin Ar18 <kevinar18 at hotmail.com> wrote:
>> 
>>  I posted this on the forum, but nobody seems to know the solution: http://python-forum.org/py/viewtopic.php?t=5230
>> 
>>  I have a zip file that is several GB in size, and one of the files inside of it is several GB in size.  When it comes time to read the 5+GB file from inside the zip file, it fails with the following error:
>>  File "...\zipfile.py", line 491, in read bytes = self.fp.read(zinfo.compress_size)
>>  OverflowError: long it too large to convert to int
>
> That will be an number which is bigger than 2**31 == 2 GB which can't
> be converted to an int.
>
> It would be explained if zinfo.compress_size is > 2GB, eg
>
>   >>> f=open("z")
>   >>> f.read(2**31)
>   Traceback (most recent call last):
>     File "<stdin>", line 1, in ?
>   OverflowError: long int too large to convert to int
>
> However it would seem nuts that zipfile is trying to read > 2GB into
> memory at once!

Perhaps, but that's what the read(name) method does - returns a string
containing the contents of the selected file.  So I think this runs
into a basic issue of the maximum length of Python strings (at least
in 32bit builds, not sure about 64bit) as much as it does an issue
with the zipfile module.  Of course, the fact that the only "read"
method zipfile has is to return the entire file as a string might
be considered a design flaw.

For the OP, if you know you are going to be dealing with very large
files, you might want to implement your own individual file
extraction, since I'm guessing you don't actually need all 5+GB of the
problematic file loaded into memory in a single I/O operation,
particularly if you're just going to write it out again, which is what
your original forum code was doing.

I'd probably suggest just using the getinfo(name) method to return the
ZipInfo object for the file in question, then process the appropriate
section of the zip file directly.  E.g., just seek to the proper
offset, then read the data incrementally up to the full size from the
ZipInfo compress_size attribute.  If the files are compressed, you can
incrementally hand their data to the decompressor prior to other
processing.

E.g., instead of your original:

    fileData = dataObj.read(i)
    fileHndl = file(fileName,"wb")
    fileHndl.write(fileData)
    fileHndl.close()

something like (untested):

    CHUNK = 65536    # I/O chunk size

    fileHndl = file(fileName,"wb")

    zinfo = dataObj.getinfo(i)
    compressed = (zinfo.compress_type == ZLIB_DEFLATED)
    if compressed:
        dc = zlib.decompressobj(-15)

    dataObj.fp.seek(zinfo.header_offset+30)
    remain = zinfo.compress_size
    while remain:
        bytes = dataObj.fp.read(min(remain, CHUNK))
        remain -= len(bytes)
        if compressed:
            bytes = dc.decompress(bytes)
        fileHndl.write(bytes)

    if compressed:
        bytes = dc.decompress('Z') + dc.flush()
        if bytes:
            fileHndl.write(bytes)

    fileHndl.close()        

Note the above assumes you are only reading from the zip file as it
doesn't maintain the current read() method invariant of leaving the
file pointer position unchanged, but you could add that too.  You
could also verify the file CRC along the way if you wanted to.

Might be even better if you turned the above into a generator, perhaps
as a new method on a local ZipFile subclass.  Use the above as a
read_gen method with the write() calls replaced with "yield bytes",
and your outer code could look like:

    fileHndl = file(fileName,"wb")
    for bytes in dataObj.read_gen(i):
        fileHndle.write(bytes)
    fileHndl.close()

-- David


From llasram at gmail.com  Wed Aug 29 09:03:54 2007
From: llasram at gmail.com (Marshall T. Vandegrift)
Date: Wed, 29 Aug 2007 09:03:54 -0400
Subject: Code design problem
References: <1188389375.238847.298320@w3g2000hsg.googlegroups.com>
Message-ID: <87k5re5w79.fsf@seneca.iss.local>

Marco Nawijn <nawijn at gmail.com> writes:

> The problem I face is that the implementation of the application class
> is completely different for the local and remote case. The local case
> is a straightforward implemenation using the subprocess module, the
> remote case is a CORBA implementation. Somehow I would like to switch
> from implementation class at runtime depending on whether or not the
> host parameter is specified or not.
>
> The Application, local implementation and remote implementation all
> have the same interface, so a possibility might be something like the
> following:

<snipped example>

> To me forwarding each call in the Application class looks a little bit
> redundant and I would like to get rid of it. Does anyone have any
> comments or suggestions? Can metaclass programming come to rescue?

It sounds like you could probably get away with just a factory function:

    def Application(program, host=None):
        if host is None:
            return LocalApplication(program)
        else:
            return RemoteApplication(program, host)

Then just implement the same interface and/or derive from a common base
class for LocalApplication and RemoteApplication.

HTH!,

-Marshall



From bjourne at gmail.com  Tue Aug 14 04:22:51 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Tue, 14 Aug 2007 10:22:51 +0200
Subject: decorators - more than just syntactic sugar
In-Reply-To: <5ibs99F3nq29uU1@mid.individual.net>
References: <46be005e$0$13866$ba620e4c@news.skynet.be>
	<mailman.1910.1187003498.22759.python-list@python.org>
	<5ibs99F3nq29uU1@mid.individual.net>
Message-ID: <740c3aec0708140122k18642557u2f11306564b00975@mail.gmail.com>

On 8/13/07, Bjoern Schliessmann
<usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote:
> BJ?rn Lindqvist wrote:
>
> > unpedagogically not separated from ordinary functions.
>
> Decorators _are_ ordinary functions. Remember the "syntactic sugar"
> in this thread?

Remember also "that syntactic sugar is important." Case in point, the
OP did not think of looking at the built-in functions page.

-- 
mvh Bj?rn


From danb_83 at yahoo.com  Thu Aug  9 20:52:44 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: Thu, 09 Aug 2007 17:52:44 -0700
Subject: beginner whitespace question
In-Reply-To: <1186704161.334597.218750@z24g2000prh.googlegroups.com>
References: <1186703261.136506.208660@x35g2000prf.googlegroups.com>
	<1186703525.591462.122140@m37g2000prh.googlegroups.com>
	<1186704161.334597.218750@z24g2000prh.googlegroups.com>
Message-ID: <1186707164.095766.243480@q3g2000prf.googlegroups.com>

On Aug 9, 7:02 pm, eggie5 <egg... at gmail.com> wrote:
> On Aug 9, 4:52 pm, Dan Bishop <danb... at yahoo.com> wrote:
>
> > On Aug 9, 6:47 pm, eggie5 <egg... at gmail.com> wrote:
>
> > > I keep getting an error for line 7, what's wrong with this?
>
> > > from django.db import models
>
> > > class Poll(models.Model):
> > >     question = models.CharField(max_length=200)
> > >     pub_date = models.DateTimeField('date published')
>
> > >         def __unicode__(self):
> > >                 return self.question
>
> > The "def" statements have to be at the same indentation level as
> > what's before it.
>
> will they still be a part of the classes?

If you indent them twice, it's a syntax error.
If you indent them once, they'll be methods of the class.
If you don't indent them at all, they'll be global functions.



From aine_canby at yahoo.com  Tue Aug 21 10:36:25 2007
From: aine_canby at yahoo.com (aine_canby at yahoo.com)
Date: Tue, 21 Aug 2007 07:36:25 -0700
Subject: Python Path Dictionary
Message-ID: <1187706985.476483.292820@g4g2000hsf.googlegroups.com>

Hi,

Do the Python Paths come in the form of a dictionary where I can
access a particular path my its key in the registry?

For example, in PythonWin Tools>>Edit Python Paths shows the name as
well of the address of each path

Thanks,

Aine



From robert.kern at gmail.com  Wed Aug  8 12:39:16 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 08 Aug 2007 11:39:16 -0500
Subject: SciPy's site is down
In-Reply-To: <1186584873.075215.326620@b79g2000hse.googlegroups.com>
References: <1186584873.075215.326620@b79g2000hse.googlegroups.com>
Message-ID: <f9crjv$6b1$1@sea.gmane.org>

a.harrowell at gmail.com wrote:
> Can anyone else not reach scipy.org?

It's working for me. Of course, I'm 50 feet away from it. <sshing to somewhere
remote> But I can also reach it from elsewhere, too.

> Am trying to install scipy and
> numpy. Further, is there an equivalent of numpy that will install
> correctly on Python 2.5 on WinVista?

If you can connect again to scipy.org, please tell us the problems you've had
installing numpy on Vista at numpy-discussion at scipy.org. I believe that someone
has mentioned that the binary installer worked fine for them.

  http://scipy.org/Mailing_Lists

-- 
Robert Kern

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



From vedrandekovic at v-programs.com  Tue Aug  7 10:38:37 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Tue, 07 Aug 2007 07:38:37 -0700
Subject: distutils
In-Reply-To: <mailman.1710.1186491267.22759.python-list@python.org>
References: <1186489676.042901.236140@w3g2000hsg.googlegroups.com>
	<mailman.1710.1186491267.22759.python-list@python.org>
Message-ID: <1186497517.224280.126070@22g2000hsm.googlegroups.com>

On 7 kol, 14:53, Steve Holden <st... at holdenweb.com> wrote:
> vedrandeko... at v-programs.com wrote:
> > Hello again,
>
> > Is there any patch for python "distutils", for this
>
> >>>> from distutils import log,dir_util
> > ImportError: cannot import name log
>
> What version of Python are you running with? It looks as though there
> may be something wrong with your installation if it's recent:
>
> sholden at bigboy ~/Projects/Python
> $ python
> Python 2.5.1 (r251:54863, May 18 2007, 16:56:43)
> [GCC 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)] on cygwin
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> from distutils import log
>  >>> import distutils.log
>  >>>
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------

Hello,

My version of python is 2.4 and I'am running it with Windows XP



From stefan.behnel-n05pAM at web.de  Wed Aug 29 16:03:08 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 29 Aug 2007 22:03:08 +0200
Subject: IDE for Python
In-Reply-To: <mailman.277.1187982888.32294.python-list@python.org>
References: <46CAB7D4.5070308@gmail.com>
	<mailman.277.1187982888.32294.python-list@python.org>
Message-ID: <46D5D0FC.6050908@web.de>

Eric CHAO wrote:
> I think many python developers don't need such an IDE actually. Just
> like Ruby guys, they use a powerful editor, for example, Textmate,
> instead of all-in-one IDE. It's quick and direct.

True. However, some use neither an editor nor an IDE but Emacs.

Stefan


From naughton at umn.edu  Fri Aug 31 13:36:34 2007
From: naughton at umn.edu (David Naughton)
Date: Fri, 31 Aug 2007 12:36:34 -0500
Subject: troll vs. trawl [was: Re: list index()]
In-Reply-To: <1cnfd31du01el95u70o8mjn9cb5r5aluiu@4ax.com>
References: <1188497498.3468.60.camel@dot.uniqsys.com>
	<021801c7eba2$ad429640$03000080@hendrik>
	<1cnfd31du01el95u70o8mjn9cb5r5aluiu@4ax.com>
Message-ID: <20070831173634.GB804@umn.edu>

On Fri, Aug 31, 2007 at 10:27:34AM +0100, Richie Hindle wrote:
> 
> [Carsten]
> > .................. If we start labeling
> > people, this thread will earn you a label that rhymes with "roll".
> 
> [Hendrik]
> > weird this - maybe a native English speaker can comment - 
> > when I pronounce what fishermen do - it rhymes with roll,
> > but when I am talking about the thing that lives under bridges
> > and munches goats, the "O" sound is shorter, and more 
> > towards the back of my mouth.
> 
> But - the word for someone who posts to the internet with the intention of
> stirring up trouble derives from the word for what fishermen do, not from
> the word for something that lives under a bridge.  It derives from "trolling
> for suckers" or "trolling for newbies".

Many thesauri list the 'troll' as a synonym of 'trawl'. Given their
etymologies...

1. 'trawl' is 'probably from L. tragula "dragnet."'
  -- <URL: http://www.etymonline.com/index.php?term=trawl>

2. <blockquote>

troll (v.) 
    1377, "to go about, stroll," later (c.1425) "roll from side to side,
trundle," from O.Fr. troller, a hunting term, "wander, to go in quest of
game without purpose," from a Gmc. source (cf. O.H.G. trollen "to walk
with short steps"), from P.Gmc. *truzlanan. Sense of "sing in a full,
rolling voice" (first attested 1575) and that of "fish with a moving
line" (1606) are both extended technical applications of the general
sense of "roll, trundle," the latter perhaps confused with trail or
trawl. Fig. sense of "to draw on as with a moving bait, entice, allure"
is from 1565. Meaning "to cruise in search of sexual encounters" is
recorded from 1967, originally in homosexual slang.

</blockquote>

  -- <URL: http://www.etymonline.com/index.php?term=troll>

... it was probably inevitable that 'troll' and 'trawl' become
synonymous.

David
 
> -- 
> Richie Hindle
> richie at entrian.com


From zellux at doe.com  Fri Aug  3 07:45:17 2007
From: zellux at doe.com (ZelluX)
Date: Fri, 3 Aug 2007 11:45:17 +0000 (UTC)
Subject: How to read information from tables in HTML?
Message-ID: <f8v4gd$qfa$1@news.cn99.com>

Hi, all

I'm confronted with some trouble when dealing with html files.

The html files contain javascript and some information stored in tables.
And it seems that they're not well-formed, when parsed with minidom, it
will say "mismatched tag".
Then how can i get information from those files? Is there any useful
library for me?

Many thanks ;-)


From dolgun at excite.com  Thu Aug 30 05:46:13 2007
From: dolgun at excite.com (7stud)
Date: Thu, 30 Aug 2007 09:46:13 -0000
Subject: gc.garbage
Message-ID: <1188467173.708043.44800@w3g2000hsg.googlegroups.com>

gc.garbage returns an empty list even though the command:

 gc.set_debug(gc.DEBUG_LEAK)

produces the following output:

gc: uncollectable <Dog 0x56e10>
gc: uncollectable <Cat 0x56e30>
gc: uncollectable <dict 0x58270>
gc: uncollectable <dict 0x43e40>

I expected all those objects to be in the list returned by
gc.garbage.  Here's the code:

import gc

class Cat(object):
    def __del__():
        pass

class Dog(object):
    def __del__():
        pass

def some_func():
    the_dog = Dog()
    the_cat = Cat()
    the_dog.cat = the_cat
    the_cat.dog = the_dog

some_func()

gc.set_debug(gc.DEBUG_LEAK)
print gc.garbage

--output:--
[]
gc: uncollectable <Dog 0x56e10>
gc: uncollectable <Cat 0x56e30>
gc: uncollectable <dict 0x58270>
gc: uncollectable <dict 0x43e40>



From rcdailey at gmail.com  Sun Aug 12 19:20:49 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Sun, 12 Aug 2007 18:20:49 -0500
Subject: Binary, Hex, and Decimal string conversions
In-Reply-To: <C5FFAC23-F5DC-4112-A508-EC9BDF2FAB43@jedimindworks.com>
References: <496954360708111559s1cef4212pabd14e95b27435ea@mail.gmail.com>
	<C5FFAC23-F5DC-4112-A508-EC9BDF2FAB43@jedimindworks.com>
Message-ID: <496954360708121620r4dd68ac9o430326ae8c8ae04d@mail.gmail.com>

Well, I decided to implement my own way of doing this. I've attached the
source. You're all welcome :)

On 8/12/07, Michael Bentley <michael at jedimindworks.com> wrote:
>
> Hi Robert,
> On Aug 11, 2007, at 3:59 PM, Robert Dailey wrote:
>
> Hi, I was wondering if there is a built in module that supports conversion
> in any direction between Binary, Hex, and Decimal strings? Thanks.
>
>
> Shouldn't be too hard to build one.  Here's a little incantation to
> convert from base 10 to another base:
>
> import string
>
> def to_base(number, base):
> 'converts base 10 integer to another base'
>
> number = int(number)
> base = int(base)
> if base < 2 or base > 36:
> raise ValueError, "Base must be between 2 and 36"
> if not number:
> return 0
>  symbols = string.digits + string.lowercase[:26]
> answer = []
> while number:
> number, remainder = divmod(number, base)
> answer.append(symbols[remainder])
> return ''.join(reversed(answer))
>
> How 'bout you hack a from_base function and email it back to me? (hint:
> type 'help(int)' in the python interpreter).
>
> Peace,
> Michael
>
> ---
> Let the wookie win.
>
>
>
>
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From rodrigo.cr at gmail.com  Tue Aug 28 14:14:10 2007
From: rodrigo.cr at gmail.com (rodrigo)
Date: Tue, 28 Aug 2007 18:14:10 -0000
Subject: Check for dict key existence, and modify it in one step.
In-Reply-To: <46d43860$0$428$426a74cc@news.free.fr>
References: <1188311810.226363.295500@w3g2000hsg.googlegroups.com>
	<46d43860$0$428$426a74cc@news.free.fr>
Message-ID: <1188324850.000752.60230@19g2000hsx.googlegroups.com>

You're right of course, I was unclear. I wasn't using 'dict' to
override the dict clas, but just as a standin for the example (the
actual dictionary names are varied).

Thanks,

Rodriog



From carsten at uniqsys.com  Thu Aug 30 09:59:06 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 30 Aug 2007 09:59:06 -0400
Subject: SAXParseException: not well-formed (invalid token)
In-Reply-To: <46D6C40F.4060105@cesga.es>
References: <fb6alc$pfj$1@news.cesga.es> <46D6B9F6.2010402@web.de>
	<46D6C40F.4060105@cesga.es>
Message-ID: <1188482346.3468.13.camel@dot.uniqsys.com>

On Thu, 2007-08-30 at 15:20 +0200, Pablo Rey wrote:
> 	About the possibility that you mention to recoding the input, could you 
> let me know how to do it?. I am sorry I am starting with Python and I 
> don't know how to do it.

While I answered this question in my previous reply, I wanted to add
that you might find the following How-To helpful in demystifying
Unicode:

http://www.amk.ca/python/howto/unicode

-- 
Carsten Haese
http://informixdb.sourceforge.net




From XX.XmcX at XX.XmclaveauX.com  Sun Aug 19 17:53:24 2007
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Sun, 19 Aug 2007 23:53:24 +0200
Subject: Syntax Question - list multiplication
References: <1187560273.146491.90530@r29g2000hsg.googlegroups.com>
Message-ID: <mn.9d997d78fb085e82.46195@XX.XmclaveauX.com>

Classic

-- 
@-salutations

Michel Claveau




From peter.mosley at talk21.com  Mon Aug 20 03:50:15 2007
From: peter.mosley at talk21.com (peter)
Date: Mon, 20 Aug 2007 00:50:15 -0700
Subject: Python and Tkinter Programming--Expensive!
In-Reply-To: <Xllxi.9066$3x.1781@newssvr25.news.prodigy.net>
References: <Xllxi.9066$3x.1781@newssvr25.news.prodigy.net>
Message-ID: <1187596215.313223.106150@o80g2000hse.googlegroups.com>

On 17 Aug, 18:59, "W. Watson" <wolf_tra... at invalid.com> wrote:
> Why is the book in Subject (author is Grayson) so expensive? $100 on Amazon
> and $195 on ABE. Aren't there alternatives?
> --
>                           Wayne Watson (Nevada City, CA)
>
>                         Web Page: <speckledwithStars.net>


I got hold of a copy a couple of years ago via my public library, and
quite frankly didn't find it much use.  It was too brief on the
basics, and the bulk of the book was taken up with a description of an
extension called Python Megawidgets.  Such Tkinter knowledge as I have
acquired came from Frederik Lundh's tutorial, which is free!

http://www.pythonware.com/media/data/an-introduction-to-tkinter.pdf

I recorded my experiences here:

http://www.aqzj33.dsl.pipex.com/how_i_learned_tkinter/contents.htm

Surprisingly the address is still valid, as I stoped that isp
subscription about a year ago.  But the email I cite there has been
abandoned to spam now.

Peter




From silfheed at gmail.com  Tue Aug 21 18:16:42 2007
From: silfheed at gmail.com (Silfheed)
Date: Tue, 21 Aug 2007 22:16:42 -0000
Subject: Adjusting the names of custom exceptions (since raising strings
	is deprecated)
In-Reply-To: <fafjbi$4kl$00$1@news.t-online.com>
References: <1187672085.263963.157470@z24g2000prh.googlegroups.com>
	<5qxyi.18719$eY.12647@newssvr13.news.prodigy.net>
	<1187723880.146487.36250@l22g2000prc.googlegroups.com>
	<fafjbi$4kl$00$1@news.t-online.com>
Message-ID: <1187734602.457548.166460@j4g2000prf.googlegroups.com>

On Aug 21, 1:53 pm, Peter Otten <__pete... at web.de> wrote:
> Silfheed wrote:
> > On Aug 21, 1:32 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> >> Silfheed wrote:
> >> > Heyas
>
> >> > So this probably highlights my lack of understanding of how naming
> >> > works in python, but I'm currently using FailUnlessRaises in a unit
> >> > test and raising exceptions with a string exception.  It's working
> >> > pretty well, except that I get the deprecation warning that raising a
> >> > string exception is going to go away.  So my question is, how do I
> >> > mangle the name of my exception class enough that it doesnt stick the
> >> > name of the module before the name of the exception?
>
> >> > Namely I'd like to get the following
>
> >> > ***
> >> > Traceback (most recent call last):
> >> >   File "<stdin>", line 1, in ?
> >> > MyError: 'oops!'
>
> >> > instead of
>
> >> > ***
> >> > Traceback (most recent call last):
> >> >   File "<stdin>", line 1, in ?
> >> > __main__.MyError: 'oops!'
>
> >> > (or even test_thingie.MyError as is usually the case).
>
> >> > Creating a class in a separate file and then doing
>
> >> > ***
> >> > from module import MyError
> >> > raise MyError
>
> >> > still gives
>
> >> > ***
> >> > Traceback (most recent call last):
> >> >   File "<stdin>", line 1, in <module>
> >> > module.MyError
>
> >> > Anyway, any help appreciated.
>
> >> Would it be cheating to use metaclasses?
>
> >> # myModule.py
> >> class ExampleType(type):
> >>    def __repr__(cls):
> >>      return cls.__name__
>
> >> class ExampleError(Exception):
> >>    __metaclass__ = ExampleType
> >>    __name__ = 'ExampleError'
> >>    def __repr__(self):
> >>      return 'ExampleError'
>
> >> py> import myModule
> >> py> raise myMo
> >> myModule      myModule.py   myModule.pyc  myModule.py~
> >> py> raise myModule.Ex
> >> myModule.ExampleError  myModule.ExampleType
> >> py> raise myModule.ExampleError
> >> ------------------------------------------------------------
> >> Traceback (most recent call last):
> >>    File "<ipython console>", line 1, in <module>
> >> ExampleError
>
> >> James
>
> > It doesnt appear to work for me.
> > Same exact code as you have but I still get:
>
> >>>> raise myModule.ExampleError
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > myModule.ExampleError
>
> James tested his code in the ipython console which obviously uses a
> different routine to produce the traceback.
>
> Try
>
> >>> class MyError(Exception):
>
> ...     __module__ = None
> ...>>> raise MyError("oops")
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> MyError: oops
>
> Peter

Ah ha! Thanks, that worked great!



From laurent.pointal at limsi.fr  Tue Aug 14 04:48:46 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 14 Aug 2007 10:48:46 +0200
Subject: [half-off] LAMA - how to I use the news server with thunderbird
In-Reply-To: <mailman.1953.1187080783.22759.python-list@python.org>
References: <mailman.1953.1187080783.22759.python-list@python.org>
Message-ID: <f9rq9f$8qv$1@news2.u-psud.fr>

durumdara a ?crit :
> Hi!
> 
> Is anyone knows about an NNTP servers that containing newsgroups about 
> these lists:
>    - python win32 (python-win32)
>    - mod_python
>    - gimp-python
>    - gimp
> 
> I wanna set thes nntp servers in thunderbird so I need correct addresses.
> 
> Thanks for your help:
>    dd

In my pythonfr/fr.comp.lang.python "Message de Bienvenue", I reference 
Gmane which mirror via nntp several Python related mailing lists, maybe 
you can find your hope there (or ask them to add mirrors for your 
interrest lists).

See http://news.gmane.org/index.php?prefix=gmane.comp.python

A+

Laurent.


From tjreedy at udel.edu  Wed Aug 22 10:36:11 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 22 Aug 2007 10:36:11 -0400
Subject: Where we need to use Python ?
References: <1187596936.136499.200280@l22g2000prc.googlegroups.com><mailman.5.1187616200.26576.python-list@python.org>
	<46cc26ed$0$432$426a74cc@news.free.fr>
Message-ID: <fahhm1$39o$1@sea.gmane.org>


|"Bruno Desthuilliers" Terry Reedy a ?crit :
|
|> The CPython implementation of the langauge compiles Python to 
proprietary
|> byte code

|Hahem... "proprietary" is certainly not the right term here.

a. you are being nitpicky, overly in my opinion
b. you failed to suggest a better term, hence cannot expect the same of me

In any case, CPython is owned by PSF (which gives it away).  Its bytecode 
is an private implementation detail subject to change in any .x version as 
the developers see fit. 





From fakeaddress at nowhere.org  Fri Aug 24 00:23:20 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 24 Aug 2007 04:23:20 GMT
Subject: Socket recv(1) seems to block instead of returning end of file.
In-Reply-To: <13cr4u8mimniub4@corp.supernews.com>
References: <mailman.164.1187862959.32294.python-list@python.org>
	<13cr4u8mimniub4@corp.supernews.com>
Message-ID: <Y2tzi.30236$RX.18701@newssvr11.news.prodigy.net>

Grant Edwards wrote:
[...]
> import socket,random
> 
> HOST = ''                 # Symbolic name meaning the local host
> PORT = 8765               # Arbitrary non-privileged port
> s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> s.connect((HOST, PORT))

Actually the empty string passed for the host means INADDR_ANY,
which does not really make sense for the client. On my Win-XP
system, the client fails with

   socket.error: (10049, "Can't assign requested address")

For the loop-back adapter, 'localhost' or '127.0.0.1' should
work.


-- 
--Bryan


From mikeminer53 at hotmail.com  Mon Aug 20 11:48:21 2007
From: mikeminer53 at hotmail.com (mkPyVS)
Date: Mon, 20 Aug 2007 08:48:21 -0700
Subject: regular expression dictionary search
In-Reply-To: <mailman.25.1187624159.26576.python-list@python.org>
References: <d6a0d8f10708181139m730d7aa6t1c9f6e624d6db9aa@mail.gmail.com>
	<mailman.25.1187624159.26576.python-list@python.org>
Message-ID: <1187624901.163499.157680@i13g2000prf.googlegroups.com>

On Aug 20, 9:35 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> #!/usr/bin/env python
>
> import re
>
> patterns = { 'sho.' : 6, '.ilk' : 8, '.an.' : 78 }
>
> def returnCode(aWord):
>     for k in patterns:
>         p = "^%s$" % k
>         regex = re.compile(p)
>         if re.match(regex, aWord):
>             return patterns[k]
>
> if __name__ == "__main__":
>
>     print "The return for 'fred' : %s" % returnCode('fred')
>     print "The return for 'silk' : %s" % returnCode('silk')
>     print "The return for 'silky' : %s" % returnCode('silky')
>     print "The return for 'hand' : %s" % returnCode('hand')
>     print "The return for 'strand' : %s" % returnCode('strand')
>     print "The return for 'bank' : %s" % returnCode('bank')
>
> Note: If a word matches more than one pattern, only one will be returned.
>
> I'm not sure if I'm doing the patterns thing properly -- if anyone
> could instruct me on whether it would be proper to declare it in the
> function, or use a global declaration, please let me know. However, it
> runs properly as far as I tested it.
>
> Shawn

I think global/local declaration should in part depend on the scope of
your usage. Are you going to re-use the function over and over again
in multiple modules? Does it need any state collecting statistics? If
so I would recommend you upgrade your function to a class then define
"patterns" as a static class level variable. Then the initialization
cost is eaten only for creation of the class (most often) the 1st
time.

As a side note unless you are searching large buffers it is possibly
more costly to compile into a re object then do a match with it as
opposed to let the match object perform a compile a function level
itself- if you use the class option above I would recommend storing
the re.compiled versions of your patterns in the dictionary
(everything is an object!) rather than the string repr and issuing a
compile.

mkPyVS



From pepper at rumbalski.com  Tue Aug 21 14:38:28 2007
From: pepper at rumbalski.com (pepper at rumbalski.com)
Date: Tue, 21 Aug 2007 11:38:28 -0700
Subject: confused about why i get a type error when i call an object's
	method
In-Reply-To: <1187719841.367010.293930@e9g2000prf.googlegroups.com>
References: <1187719631.092657.158410@d55g2000hsg.googlegroups.com>
	<1187719841.367010.293930@e9g2000prf.googlegroups.com>
Message-ID: <1187721508.232606.42440@57g2000hsv.googlegroups.com>

Ha!  I knew it was obvious.  Thank you.




From Shawn at Milochik.com  Wed Aug 15 10:47:40 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Wed, 15 Aug 2007 10:47:40 -0400
Subject: [Tutor] Python Book Recommendations
In-Reply-To: <1b31ae500708141638w77614014o6f382d0389bc69df@mail.gmail.com>
References: <d5506a9f0708141439v6a30d4c8l5092b30d269c1af4@mail.gmail.com>
	<Pine.LNX.4.44.0708141556370.5396-100000@violet.rahul.net>
	<1b31ae500708141638w77614014o6f382d0389bc69df@mail.gmail.com>
Message-ID: <2dc0c81b0708150747g2df755fco51c023d9a5c0ed47@mail.gmail.com>

If I could have only one book, I would buy "Core Python, Second
Edition," by Wesley Chun.

For the record, I own:
Core Python, Second Edition (great)
wxPython in Action (haven't used yet)
Beginning Python (barely used)
Python in a Nutshell (use as a reference, although interactive python
dir() is more useful)
Dive into Python (great book)
Python Cookbook (great book)
Python Pocket Reference (not very useful)
Python Phrasebook (I love the Phrasebook series, but this isn't a
necessary book)


From ivoras at __fer.hr__  Mon Aug 27 16:42:45 2007
From: ivoras at __fer.hr__ (Ivan Voras)
Date: Mon, 27 Aug 2007 22:42:45 +0200
Subject: Biased random?
Message-ID: <favd0c$fcu$1@ss408.t-com.hr>

Hi,

I have a list of items, and need to choose several elements from it,
"almost random". The catch is that the elements from the beginning
should have more chance of being selected than those at the end (how
much more? I don't care how the "envelope" of probability looks like at
this point - can be linear). I see that there are several functions in
Python standard libraries for various distribution, but is there an easy
pythonic way to make them do what I need?


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From ajmacd at ns.sympatico.ca  Sat Aug 11 21:46:16 2007
From: ajmacd at ns.sympatico.ca (Aaron J. M.)
Date: Sat, 11 Aug 2007 18:46:16 -0700
Subject: Pausing and Unpausing Threads
Message-ID: <1186883176.319755.304970@d55g2000hsg.googlegroups.com>

Hello,

This is a question about how to pause and unpause threads (as the
title suggests).

I've created an extension of threading.Thread which I'll call Server.
Server has a collection of Controlers.  A Controler has a method
turn(), which lets it do various interesting things.  While the
Server is running, it loops through each of its Controlers and calls
their turn() method.

One of these Controlers is a subclass called DirectedControler.
What a DirectedControler is meant to do is wait until it is given an
Action object it can invoke.  Actions are basically an implementation
of the Command pattern.  Actions are also invalid in certain
circumstances; they return False when executed if they didn't do
anything.  Therefore, when a DirectedControler is given a turn, it
waits while:
    - It has no Action
    - The last Action it was given didn't do anything

Actions are sent to the DirectedControler by a Client that exists in
the main thread.

What I'm trying to figure out is how to make the DirectedControler
pause while it is waiting for a valid Action.  So far I just put it
into a loop like this:

def turn(self):
    while self.__action is None or not self.__action.execute():
        self.__action = None # Throw away invalid actions
        pass

    self.__action = None # Action was valid.  Clear the way for the
                         # next turn's Action.

Where the Action is set like this (by the Client):

def setAction(self, action):
    if self.__action is None:
        self.__action = action

I'm worried that this loop may wast some CPU cycles, and wonder if
there's a better way through thread synchronization using such things
as Events or Conditions.

Thank you,

Aaron J. M.



From chad at imvu.com  Tue Aug 21 03:41:03 2007
From: chad at imvu.com (Chad Austin)
Date: Tue, 21 Aug 2007 00:41:03 -0700
Subject: GeneratorExit should derive from BaseException, not Exception
In-Reply-To: <46CA8DAD.6060704@imvu.com>
References: <46CA0EFE.6020103@imvu.com> <fadmm2$m3k$1@sea.gmane.org>
	<46CA8DAD.6060704@imvu.com>
Message-ID: <46CA970F.50208@imvu.com>

Oops, forgot to mention this:

I wouldn't be opposed to a different extension that would effectively 
let me accomplish the same goals...  arbitrary exception filters. 
Imagine this:

	try:
		raise GeneratorExit
	except ExceptionFilter:
		# blah

where ExceptionFilter is any object that can be tested for containment. 
  Perhaps implemented like this:

	class ExceptionFilter(object):
		def __init__(self):
			self.includes = set()
			self.excludes = set()

			self.include = self.includes.add
			self.exclude = self.excludes.add

		def __contains__(self, exc):
			return any(isinstance(exc, cls) for cls in self.includes) and \
				not any(isinstance(exc, cls) for cls in self.excludes)

	ImvuExceptionFilter = ExceptionFilter()
	ImvuExceptionFilter.include(Exception)
	ImvuExceptionFilter.exclude(GeneratorExit)

Then, our code could just "catch" ImvuExceptionFilter.  This type of 
extension would be backwards compatible with the current except 
(FooError, BarError) tuple syntax.

I've never hacked on CPython itself, so I don't know what kind of 
changes there would be involved, but if there is sufficient pushback 
against making GeneratorExit derive from BaseException, I think this is 
a fine alternative.  Thoughts?

Chad

Chad Austin wrote:
> Hi Terry,
> 
> Thank you for your feedback.  Responses inline:
> 
> Terry Reedy wrote:
>> "Chad Austin" <chad at imvu.com> wrote in message 
>> news:46CA0EFE.6020103 at imvu.com...
>> || try:
>> | result = yield chatGateway.checkForInvite({'userId': userId})
>> | logger.info('checkForInvite2 returned %s', result)
>>
>> would not
>> except GeneratorExit: <do whatever>
>> solve your problem?
> 
> Yes, we could add an "except GeneratorExit: raise" clause to every place
> we currently catch Exception, but I feel like this is one of those
> things where it's hard to get it right in all places and also hard to
> cover with unit tests.  Instead, we'll have subtle bugs where finally
> clauses don't run because the GeneratorExit was swallowed.
> 
> Also, SystemExit and KeyboardInterrupt were made into BaseExceptions for
> the same reasons as I'm giving.  (As I understand it, anyway.)
> 
>> | except Exception:
>>
>> Such catchalls are known to be prone to catch too much
>> and are therefore not encouraged ;-).
>> As in 'use at your own risk'.
>> Guido encourages specific catches just for the reasons you give here.
> 
> More below:
> 
>> There was a *long* discussion of the current 2.5 exception hierarchy on 
>> pydev.  Search either python.org's or gmane's archive if you want to pursue 
>> this.  But I expect the people involved would say much the same as above.
> 
> I've actually read the background on the exception hierarchy (and agree
> with it all), especially other suggestions that GeneratorExit derive
> from BaseException.  As I understand it, Guido's objections are threefold:
> 
> 1) The previous "generators as coroutines" examples were too
> theoretical:  I've wanted GeneratorExit to derive from BaseException for
> months now, but didn't write this proposal until I actually wrote code
> that failed in the presence of task cancellation.
> 
> 2) You should avoid catching everything with except Exception:  I think
> that's too idealistic. Just do a search for try: except: through
> publicly available Python.  :)  Sometimes, you really _do_ want to catch
> everything.  When you're making a network request that involves
> xmlrpclib, urllib2, httplib, etc. you don't actually care what the error
> was.  (Well, except that the exceptions are submitted for automated
> analysis.)  Similarly, when loading a cache file with pickle, I don't
> care what went wrong, because it's not critical and should not be turned
> into a crash for the user.  (We automatically report exceptions that
> bubble into the main loop as crashes.)
> 
> 3) If GeneratorExit escapes from the generator somehow and gets raised
> in the main loop, then it will bubble out of the application like
> SystemExit and KeyboardInterrupt would:  I think this argument is
> somewhat specious, because I can't imagine how that would happen.  You'd
> have to store exceptions in your generator and explicitly bubble them
> out somehow.  Our crash handling has to specially handle
> KeyboardInterrupt and SystemExit anyway, since there are currently
> non-Exception exceptions, such as strings and custom classes that forgot
> to derive from Exception, that should count as crashes.
> 
> I personally can't think of any cases where I would _want_ to handle
> GeneratorExit.  I just want finally: and with: clauses to do the right
> thing when a task is cancelled.  Anyway, I haven't yet encountered any
> serious bugs due to this yet...  I'm just worried that if a task is
> holding some resource and blocking on something, then the resource won't
> get released.  If this really does come up, then I do have a little bit
> of python + ctypes that replaces GeneratorExit with ImvuGeneratorExit
> (deriving from BaseException), but that's not very appealing.
> 
> Thanks again,
> 

-- 
Chad Austin
http://imvu.com/technology


From steve at holdenweb.com  Wed Aug  1 18:23:01 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 01 Aug 2007 18:23:01 -0400
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <f8r0du$qhn$1@sea.gmane.org>
References: <46AF8ED7.2070206@wingware.com>	<20070801212840.GA25065@spookie1.spookiegate>	<f8quug$m7j$1@sea.gmane.org>	<496954360708011453h2a68dee4x48dcb15bb25ea717@mail.gmail.com>
	<f8r0du$qhn$1@sea.gmane.org>
Message-ID: <f8r147$rvm$1@sea.gmane.org>

Joshua J. Kugler wrote:
> On Wednesday 01 August 2007 13:53, Robert Dailey wrote:
>> He's secretly an employee of Wing IDE in disguise!!!
> 
> Sorry to destroy your conspiracy theories, but no, I've never been employed
> by Wing IDE in any fashion, nor have I ever received any monetary
> compensation from them in any form.  Just a satisfied user.  That's all.
> 
> j
> 
Me too, and I have to say the response I have had to all my technical 
support requests has been first-class. Maybe they are busy because 
they're in beta? I know they aren't the largest company, but they can 
stand comparison with most when it comes to support.

I can't think of any other products I use where you can contact the 
support team from right inside the software. And get answers without 
paying per-incident support fees!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From cesmiga at gmail.com  Tue Aug 21 10:14:45 2007
From: cesmiga at gmail.com (epsilon)
Date: Tue, 21 Aug 2007 07:14:45 -0700
Subject: Trouble with CGI code from Code Example 7.3 of the "Python
	Interactive CGI Tutorial"
Message-ID: <1187705685.007927.55030@z24g2000prh.googlegroups.com>

Hey gang!

I'm having trouble with this script from a CGI lesson I'm working and
I can't seem to figure it out.  I was wondering if someone could tell
me what is wrong.  I've spent several hours trying to debug, but no
success.  Any help would be appreciated.

Thank you,
Christopher

+++++

Python Interactive CGI Tutorial - Code Example 7.3
        http://www.cs.virginia.edu/~lab2q/lesson_7/

# Define function display_page.
def display_page(result, id, session_key = 0):
    print "<HTML>\n"
    print "<HEAD>\n"
    print "\t<TITLE>Info Form</TITLE>\n"
    print "</HEAD>\n"
    print "<BODY BGCOLOR = white>\n"
    if (result == "passed"):
        if (session_key == 0):
            session_key = create_session(id)
            print id, , you are logged in with key:", session_key,
"\n"
            print "\t\t<FORM METHOD = post ACTION = \
            \"example_7.3.cgi\">\n"
            print "\t\t<INPUT TYPE = \"hidden\" NAME = \
            \"session_key\" VALUE =\", session_key, ">\n"
            print "\t\t<INPUT TYPE = \"submit\" \
            VALUE = \"Stay Logged In.\"></FORM>\n"
            print "\t\t<FORM METHOD = post ACTION = \
            \"example_7.3.cgi\">\n"
            print "\t\t<INPUT TYPE = \"hidden\" NAME = \
            \"session_key\" VALUE =", session_key, ">\n"
            print "\t\t<INPUT TYPE = \"hidden\" NAME =\
            \"logout\" VALUE = \"logout\" >\n"
            print "\t\t<INPUT TYPE = \"submit\" \
            VALUE = \"Logout.\"></FORM>\n"
        else:
            print "You entered the incorrect combo.\n"
            print "</BODY>\n"
            print "</HTML>\n"



From deets at nospam.web.de  Mon Aug 20 05:08:40 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 20 Aug 2007 11:08:40 +0200
Subject: Call for advice on how to start PyOpenGL!
References: <1187589198.616866.280500@j4g2000prf.googlegroups.com>
Message-ID: <5it40oF3qmpojU1@mid.uni-berlin.de>

math2life wrote:

> I work with python for two years, are familiar with image processing,
> but beginner on PyOpenGL and OpenGL.
> 
> Any advice appreciated!

You should check out the pyweek (http://www.pyweek.org/). There you find
pygame & OpenGL-based games, of a comprehensible size.

Diez


From steve at holdenweb.com  Sat Aug 11 10:10:53 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 11 Aug 2007 10:10:53 -0400
Subject: Deleting objects on the fly
In-Reply-To: <1186835172.396997.210710@d55g2000hsg.googlegroups.com>
References: <1186705500.227658.163170@q3g2000prf.googlegroups.com>	<46BC35F2.4070600@metavr.com>	<mailman.1842.1186771794.22759.python-list@python.org>
	<1186835172.396997.210710@d55g2000hsg.googlegroups.com>
Message-ID: <f9kg1d$tdg$1@sea.gmane.org>

Dustan wrote:
> On Aug 10, 1:49 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
>> "Campbell Barton" <cbar... at metavr.com> wrote in message
>>
>> news:46BC35F2.4070600 at metavr.com...| Michele Simionato wrote:
>>
>> | > Probably not, 'del x' just decrements the reference count,
>>
>> Or ashttp://docs.python.org/ref/del.html
>> puts it, " Deletion of a name removes the binding of that name from the
>> local or global namespace,"
>>
>> | del x will remove x from memory if nothing else is refering to it,
>>
>> This is implementation dependent: true for CPython, not for Jython, ??? for
>> IronPython.
> 
> Wait a second; do you mean to say that in Jython, del x will never
> remove x from memory? How do you free up RAM?
> 
Because the exact method of garbage collection is independent of the 
language definition, Jython uses the Java garbage collector, which works 
(approximately) as follows.

In that language memory is allocated until a request cannot be 
satisfies, then a scan is performed for unreferenced objects whose space 
is reclaimed. Only if this doesn't yield enough space to allocate the 
new object is more memory requested from the OS by the process.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Aug 14 16:27:25 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 14 Aug 2007 22:27:25 +0200
Subject: wxPython before MainLoop
References: <13bl9a75laqcm70@corp.supernews.com>	<13bnh5bs4b9h427@corp.supernews.com>	<5i3b1jF3n5bdtU1@mid.individual.net>	<13c1v79hs0dob3@corp.supernews.com>
	<mailman.1948.1187055857.22759.python-list@python.org>
	<13c27q5meq90lb2@corp.supernews.com>
Message-ID: <5iehhdF3oc4jqU2@mid.individual.net>

[david] wrote:
> Steve, it wasn't me that raised the comparison
> with MFC. If you don't think that's a helpful
> comparison, why not reply to that post instead?

It _was_ a comparison, saying that they follow similar principles.
You twisted this comparison by saying wxPython was an imitation of
MFC. You ignored the fact that your problem is solved by MFC in a
similar way, just as in every other GUI toolkit other posters here
and me know of.

> I don't mind Bj?rn's suggestion that I don't
> know what I'm talking about,

Where did I write this?

> because I started it by telling him he was wrong.

Excuse me, where am I wrong?


Bj?rn

-- 
BOFH excuse #163:

no "any" key on keyboard



From aahz at pythoncraft.com  Thu Aug 23 18:57:35 2007
From: aahz at pythoncraft.com (Aahz)
Date: 23 Aug 2007 15:57:35 -0700
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com>
	<87tzqpew22.fsf@wilson.homeunix.com>
Message-ID: <fal3cv$bi2$1@panix3.panix.com>

In article <87tzqpew22.fsf at wilson.homeunix.com>,
Torsten Bronger  <bronger at physik.rwth-aachen.de> wrote:
>Aahz writes:
>> In article <87odgyyx9u.fsf at wilson.homeunix.com>,
>> Torsten Bronger  <bronger at physik.rwth-aachen.de> wrote:
>>>
>>> Some LaTeX users in Aachen thought about a general-use markup
>>> language this spring.  I wrote some code and a rough project
>>> description, however, we could need some help.
>>
>> http://docutils.sourceforge.net/
>
>The provisional project page already points to
>http://docutils.sourceforge.net/rst.html which is sufficient I
>think.

My point is that docutils already exists; given the combined competition
from LaTeX and docutils and OpenOffice, you should probably explain what
differentiates your project and why people should support your project
instead of (or in addition to) others.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From vedrandekovic at v-programs.com  Fri Aug 10 06:47:51 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Fri, 10 Aug 2007 03:47:51 -0700
Subject: py2exe with python 2.5
In-Reply-To: <1186736574.092633.196100@d30g2000prg.googlegroups.com>
References: <1186731595.139576.107660@e9g2000prf.googlegroups.com>
	<1186736574.092633.196100@d30g2000prg.googlegroups.com>
Message-ID: <1186742871.144805.163450@q4g2000prc.googlegroups.com>

On 10 kol, 11:02, Ant <ant... at gmail.com> wrote:
> On Aug 10, 8:39 am, vedrandeko... at v-programs.com wrote:
>
>
>
> > Hello,
>
> > Now,I was install python 2.5 and remove python 2.4 completely.After I
> > write:
> > $ python mysetup.py py2exe
> > .......
> >      import py2exe_ util
> > ImportError: Module use of conflicts with this version of Python
>
> > ...ok, I know what is a problem, I haven't remove python completely,
> > in my computer is one more folder Panda3D-1.4.0 but when I remove it
> > and all dll files include python24.dll, I cannot run python or make
> > that setup.
> > (That panda3d contain python)
>
> > Regards,
> > Vedran
>
> Sounds like your path needs setting up properly. Try typing echo %PATH
> % into your console window to find out if Python2.5 is in the path. If
> you are using the default setup, then c:\Python25 should be on the
> path.
>
> --
> Ant...
>
> http://antroy.blogspot.com/

Hi,

yes,Python 2.5 is on the path, but how can I remove panda3d from that
path?

Regards,
Vedran



From claird at lairds.us  Mon Aug 13 06:40:58 2007
From: claird at lairds.us (Cameron Laird)
Date: Mon, 13 Aug 2007 10:40:58 +0000
Subject: Process Control Help
References: <1185570527.665048.48780@e9g2000prf.googlegroups.com>
Message-ID: <q2p5p4-29v.ln1@lairds.us>

In article <1185570527.665048.48780 at e9g2000prf.googlegroups.com>,
 <tylerca at jeld-wen.com> wrote:
>
>
>I'm attempting to start some process control using Python.  I've have
			.
			.
			.
>Is there an existing forum on this already?
			.
			.
			.
<URL: http://www.engcorp.com/acf/RecentChanges >

It's been dormant for a while, but it wouldn't take much to
restore its vitality.


From raims at dot.com  Fri Aug 17 10:04:15 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Fri, 17 Aug 2007 16:04:15 +0200
Subject: how to pass a custom object to re.search?
References: <1187359347.755104.118660@r29g2000hsg.googlegroups.com>
Message-ID: <1i2zz9z.jb9h6m13ontqgN%raims@dot.com>

<brunovianarezende at gmail.com> wrote:
> Is it possible to make what I want (to pass a custom object to
> re.search)?

Try to implement __str__() for your object and provide a string
representation for it.

re.search(str(custom_object))

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From arkanes at gmail.com  Tue Aug 21 13:48:04 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 21 Aug 2007 12:48:04 -0500
Subject: Manipulating raw data in Python
In-Reply-To: <BAA666C1E230E143BB9E839ED55EF1940665B96A@emss02m12.us.lmco.com>
References: <BAA666C1E230E143BB9E839ED55EF1940665B96A@emss02m12.us.lmco.com>
Message-ID: <4866bea60708211048g1ed8aa24u659443b898ed0982@mail.gmail.com>

On 8/21/07, Looney, James B <james.b.looney at lmco.com> wrote:
>
>
>
> How do I get access to a data buffer in Python so that I can directly
> view/modify the data?  My buffer size is 256 (for this specific case) bytes.
>  Most of the time, I access want to access that data in 4-byte chunks,
> sometimes in single byte chunks.  How do I go about doing so?
>
> I'm certain someone's come across (and has probably asked this question a
> few times).  I've tried various searches, and I'm either missing the
> obvious, or am not using the right key words to get what I'm looking for.  I
> mostly get back results about audio, files, etc.  In my case, I'm using an
> HDLC protocol.
>
> A little background:
> I've got a socket connection.  On the server side is C++ code.  On the
> client (Python) side, I have a SWIG-ified C++ extension.  The extension is
> my messaging API, so that I can interact with the socket in a known manner
> on both sides of the connection.  In C++, I'd usually just use a method like
> "char *getBuffer()". However, Python seems to want to treat this as a string
> even though it really isn't.  I usually only get a few bytes before Python
> encounters data which looks like a NULL.
>

Python strings are mis-named and are are actually byte sequences. They
can contain arbitrary data, including NULLs. Your SWIG wrapper is
probably buggy and is using PyString_FromString instead of
PyString_FromStringAndSize.


From tjreedy at udel.edu  Fri Aug 10 14:49:28 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 10 Aug 2007 14:49:28 -0400
Subject: Deleting objects on the fly
References: <1186705500.227658.163170@q3g2000prf.googlegroups.com><1186723571.250731.65040@q3g2000prf.googlegroups.com>
	<46BC35F2.4070600@metavr.com>
Message-ID: <f9ibvo$q7j$1@sea.gmane.org>


"Campbell Barton" <cbarton at metavr.com> wrote in message 
news:46BC35F2.4070600 at metavr.com...
| Michele Simionato wrote:
| > Probably not, 'del x' just decrements the reference count,

Or as
http://docs.python.org/ref/del.html
puts it, " Deletion of a name removes the binding of that name from the 
local or global namespace,"

| del x will remove x from memory if nothing else is refering to it,

This is implementation dependent: true for CPython, not for Jython, ??? for 
IronPython.

tjr





From stargaming at gmail.com  Thu Aug  2 03:01:03 2007
From: stargaming at gmail.com (Stargaming)
Date: 02 Aug 2007 07:01:03 GMT
Subject: a dict trick
References: <1186036331.304916.304020@e9g2000prf.googlegroups.com>
Message-ID: <46b1812f$0$9386$9b622d9e@news.freenet.de>

On Thu, 02 Aug 2007 06:32:11 +0000, james_027 wrote:

> hi
> 
> for example I have this dictionary
> 
> dict = {'name':'james', 'language':'english'}

First of all, this is a bad name because it shadows (overwrites) the 
reference to the builtin constructor, `dict`.

> value = 'sex' in dict and dict['sex'] or 'unknown'
> 
> is a right pythonic of doing this one? I am trying to get a value from
> the dict, but if the key doesn't exist I will provide one.

If you're using using Python 2.5, you could do this without `and`/`or` 
trickery::

    >>> d['name'] if 'name' in d else 'unknown'
    'james'
    >>> d['sex'] if 'sex' in d else 'unknown'
    'unknown'

But there are more elegant ways. For example, the `get` method::

    >>> d.get('name', 'unknown')
    'james'
    >>> d.get('sex', 'unknown')
    'unknown'

See the `Python Library Reference, 3.8: Mapping types <http://
docs.python.org/lib/typesmapping.html#l2h-294>` for more information on 
`dict` methods.

Or you could use the `collections.defaultdict <http://docs.python.org/lib/
defaultdict-objects.html>` type (new in 2.5, too), which I consider most 
elegant::

    >>> from collections import defaultdict
    >>> d2 = defaultdict(lambda:'unknown', d)
    >>> d2['name']
    'james'
    >>> d2['sex']
    'unknown'

HTH,
Stargaming



From llasram at gmail.com  Wed Aug 29 17:19:22 2007
From: llasram at gmail.com (Marshall T. Vandegrift)
Date: Wed, 29 Aug 2007 17:19:22 -0400
Subject: Short, crazy example: list-derived class, with __iadd__
References: <XZkBi.24445$wN3.18068@bignews2.bellsouth.net>
Message-ID: <87ejhm599h.fsf@seneca.iss.local>

Moon <no.email.here at zombo.com> writes:

> class Vec(list):
>     def __init__(self):
>         list.__init__(self, [0.0, 0.0])
>
>     def __iadd__(self, other):
>         assert isinstance(other, Vec)
>         self[0] += other[0]
>         self[1] += other[1]
>         print "right now, v is: ", self, " as you'd expect"
          return self
>
>
> v = Vec()
> w = Vec()
> w[0] = 1.0
> w[1] = 2.0
> print "v starts:", v
>
> print "(w is:", w, " which is fine)"
>
> v += w
>
> print "(w still is:", w
>
  print "after iadd, v: ", v

>
> # - running it: 

v starts: [0.0, 0.0]
(w is: [1.0, 2.0]  which is fine)
right now, v is:  [1.0, 2.0]  as you'd expect
(w still is: [1.0, 2.0]
after iadd, v:  [1.0, 2.0]

-Marshall



From bblais at bryant.edu  Fri Aug  3 08:50:14 2007
From: bblais at bryant.edu (Brian Blais)
Date: Fri, 3 Aug 2007 08:50:14 -0400
Subject: distutils and development workflow
Message-ID: <1ADEB509-9B0E-4195-BFB0-F324E4C65A8A@bryant.edu>

Hello,

I was wondering how people organize their projects while they are  
developing, and packaging with distutils.  For example, so many  
python packages let me download, then do "sudo python setup.py  
install" and they are put in the right place.  The developers of  
those packages, however, probably don't have their working copies in  
their /usr/lib/python25/lib/site-packages directory, so where do they  
put them so that they work during development, and they also work  
when packaged with distutils?

So far, I've been hacking the python path (just for me), but it isn't  
portable, so I'd like to learn how I am supposed to do it.


			thanks,

				Brian Blais

-- 
Brian Blais
bblais at bryant.edu
http://web.bryant.edu/~bblais



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From vanrpeterson at gmail.com  Thu Aug 30 09:13:04 2007
From: vanrpeterson at gmail.com (vanrpeterson at gmail.com)
Date: Thu, 30 Aug 2007 06:13:04 -0700
Subject: Creating a multi-tier client/server application
In-Reply-To: <7xy7ft4fqg.fsf@ruckus.brouhaha.com>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
	<7xy7ft4fqg.fsf@ruckus.brouhaha.com>
Message-ID: <1188479584.073309.297770@x40g2000prg.googlegroups.com>

We totally agree with your software engineering goals.  Relying on
wxPython and minimizing web reliance brings sanity to the enterprise.
We too love PostgreSQL and avoid XML whether cleaned by SOAP at all
costs.  We have found the object-relationship managers to be bloated
and unruly.   What are you building and how many hours per month are
you willing to spend supporting it?



From vodela.sai at gmail.com  Mon Aug 13 01:50:32 2007
From: vodela.sai at gmail.com (Rohan)
Date: Mon, 13 Aug 2007 05:50:32 -0000
Subject: Colored text
In-Reply-To: <1186981264.235988.40260@k79g2000hse.googlegroups.com>
References: <1186970751.435970.189900@q3g2000prf.googlegroups.com>
	<1186981264.235988.40260@k79g2000hse.googlegroups.com>
Message-ID: <1186984232.440419.207990@l22g2000prc.googlegroups.com>

On Aug 12, 10:01 pm, ianar? <ian... at gmail.com> wrote:
> On Aug 12, 10:05 pm, Rohan <vodela.... at gmail.com> wrote:
>
> > Hello,
> > Can some one tell me how do I get colored text. Say when I want to
> > write something in a text file , how do I get it colored.
>
> Plain text files don't have color. You could output in html ...

Oh ok what about a csv file, I know its also a text file but I want
the color to be say blue in an excel sheet.



From bignose+hates-spam at benfinney.id.au  Sun Aug 12 05:41:03 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 12 Aug 2007 19:41:03 +1000
Subject: Puzzled by "is"
References: <20070809194105.39BD11E400A@bag.python.org>
	<f9frbl$dps$1@sea.gmane.org>
	<mailman.1814.1186692638.22759.python-list@python.org>
	<87zm1042f0.fsf@benfinney.id.au>
	<mailman.1839.1186768658.22759.python-list@python.org>
Message-ID: <87ir7l5bv4.fsf@benfinney.id.au>

Dick Moores <rdm at rcblue.com> writes:

> At 06:13 PM 8/9/2007, Ben Finney wrote:
> >it's entirely left to the language implementation which
> >optimisation trade-offs to make, and the language user (that's you
> >and I) should *not* expect any particular behaviour to hold between
> >different implementations.
> 
> I'm not clear on the meaning of "implementations" here.  Would 2.5
> for Windows, Mac, Linux all be different implementations? Would Iron
> Python be another? ActivePython?

For the purpose of the above statement, you should consider even the
same Python on two different machines to be "different
implementations". As a programmer writing Python code, you should not
expect any "implementation-dependent" behaviour to operate in any
particular way.

-- 
 \      "The fact that a believer is happier than a skeptic is no more |
  `\   to the point than the fact that a drunken man is happier than a |
_o__)                                 sober one." ?George Bernard Shaw |
Ben Finney


From max at alcyone.com  Sun Aug 12 05:28:02 2007
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 12 Aug 2007 02:28:02 -0700
Subject: Fastest standard way to sum bytes (and their squares)?
In-Reply-To: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
Message-ID: <UMWdnTsWBIc-TyPbnZ2dnUVZ_jmdnZ2d@speakeasy.net>

And of course I meant fastest, not "fatest."  Fattest wouldn't be good, 
either.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Whoever named it necking was a poor judge of anatomy.
    -- Groucho Marx


From fd.calabrese at gmail.com  Fri Aug 31 11:49:39 2007
From: fd.calabrese at gmail.com (cesco)
Date: Fri, 31 Aug 2007 15:49:39 -0000
Subject: escaping only double quotes
Message-ID: <1188575379.041219.177910@19g2000hsx.googlegroups.com>

Hi,

I have a string which is constructed like this:

string = "Butler's 15\" TV"
s = """my string goes here "%s" """ % string

the single string, unfortunately, gets escaped which is something I
want to avoid because I have to load the data into a database using
the json format and I get an "invalid escape error" if the single
quote is escaped.

Is there a way to accomplish this?

Thanks and regards
Francesco



From steve at holdenweb.com  Thu Aug  9 15:53:28 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Aug 2007 15:53:28 -0400
Subject: Puzzled by "is"
In-Reply-To: <20070809194105.39BD11E400A@bag.python.org>
References: <20070809194105.39BD11E400A@bag.python.org>
Message-ID: <f9frbl$dps$1@sea.gmane.org>

Dick Moores wrote:
> At 10:46 AM 8/9/2007, Bill Scherer wrote:
>> Dick Moores wrote:
[...]
>> There is only one empty tuple.
>> Does that clear it up for you?
> 
> But isn't that the same as saying, "That's just the reality of 
> Python; it is what it is."? I want to know why there is only one 
> empty tuple, but more than one (1,).
> 
Why? Because.

Seriously, it's just an optimization by the implementers. There is no 
need for more than one empty tuple, since tuples can never be modified 
once created.

But they decided not to create (1, ) in advance. They probably knew that 
hardly anybody would want to create that tuple ;-) [Seriously: if you 
started trying to predict which tuples would be used you would go 
insane, but the empty tuple is the most likely candidate].

> Also,
>  >>> [] is []
> False
> 
In that case it would definitely NOT make sense to have them the same 
list. Python always ensures that the [] constructor creates a new list, 
since that list may be bound to one or more variables and mutated. You 
wouldn't want

   a = []
   b = []
   a.append("boo!")

to change b so it was no longer an empty list. If you wanted a and b to 
reference the same list you would change the second statement to

   b = a

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bj_666 at gmx.net  Wed Aug  8 09:44:35 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 Aug 2007 13:44:35 GMT
Subject: This bit of code hangs Python Indefinitely
References: <f9ch45$ku$1@solaris.cc.vt.edu>
Message-ID: <5htvm3F3md0abU3@mid.uni-berlin.de>

On Wed, 08 Aug 2007 09:38:49 -0400, brad wrote:

> url_queue = Queue.Queue(256)
> for subnet in subnets:
>      url_queue.put(subnet)
> 
> The problem is that I have 512 things to add to the queue, but my limit 
> is half that... whoops. Shouldn't the interpreter tell me that I'm an 
> idiot for trying to do this instead of just hanging? A message such as 
> this would be more appropriate:
> 
> "Hey fool, you told me to only accept 256 things and you're trying to 
> give me 512... what's up with that?"

No because you can get some things from that queue from another thread and
then the ``for``-loop goes on.  That's the typical use case for queues.

Why did you put an upper bound to the queue?

Ciao,
	Marc 'BlackJack' Rintsch


From Mike at community.nospam.com  Thu Aug 16 11:30:51 2007
From: Mike at community.nospam.com (Mike)
Date: Thu, 16 Aug 2007 11:30:51 -0400
Subject: Guitars, amps, tabs and more
References: <1187276713.342841.226620@57g2000hsv.googlegroups.com>
Message-ID: <eT8RupB4HHA.4476@TK2MSFTNGP06.phx.gbl>

this something like

Lions, Tigers and Bears Oh my!!!


Rock ON! !

<cvezvu at gmail.com> wrote in message 
news:1187276713.342841.226620 at 57g2000hsv.googlegroups.com...
> Reviews of latest models of best guitars, fender, gibson, yamaha, and
> many more, with pictures and prices.
>
> http://pro-guitars.blogspot.com/
>
>
>
> And if you want to win a free guitar go here
> http://freeguitars.blogspot.com/
> 




From http  Sat Aug  4 06:21:26 2007
From: http (Paul Rubin)
Date: 04 Aug 2007 03:21:26 -0700
Subject: How to pass a reference to the current module
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<pan.2007.08.04.01.46.50.985228@REMOVE.THIS.cybersource.com.au>
	<f90lon$av5$1@daisy.noc.ucla.edu>
	<7xtzrg3vof.fsf@ruckus.brouhaha.com>
	<f90tvv$nt7$2@zinnia.noc.ucla.edu>
	<pan.2007.08.04.04.56.18.773038@REMOVE.THIS.cybersource.com.au>
	<g7Xsi.43654$Um6.2191@newssvr12.news.prodigy.net>
Message-ID: <7xr6mjr461.fsf@ruckus.brouhaha.com>

James Stroud <jstroud at mbi.ucla.edu> writes:
>     FunctionUser.do_something_with(globals(), 'doit', 7)

How about instead of "import FunctionUser", require

   from FunctionUser import do_something

In FunctionUser.py, write:

   frob = (some object that gets necessary stuff from module environment)

   def do_something(*user_args, __frob = frob): 
      # use __frob to access FunctionUser module contents as needed
      # ...
      (func, args) = getattr(FunctionUser, user_args[0]), user_args[1:]
      func(*args)


From robert.kern at gmail.com  Mon Aug 20 15:23:49 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 20 Aug 2007 14:23:49 -0500
Subject: Mouse control with ctypes in OS X
In-Reply-To: <46C9CECC.6010401@ulmcnett.com>
References: <20070820135358.0B3052303D@atmail.b-one.net>
	<46C9CECC.6010401@ulmcnett.com>
Message-ID: <facpo6$6h3$1@sea.gmane.org>

Paul McNett wrote:
> Niklas Ottosson wrote:
>> I need to get hold of the mouse position and also need to be able to 
>> change it. In windows I have used ctypes.windll.user32.getCursorPos() 
>> and ctypes.windll.user32.setCursorPos() with great success in my program 
>> but now I also need to make a Mac OS X version of the program.
>>
>> Does anyone know what the above libraries and functions are called in OS 
>> X? Any help is greatly appreciated. 
> 
> All I can offer you is the knowledge that OS X will probably not let you 
> set the mouse position, as it is a gross violation of the HIG (The user 
> is in charge of where the mouse appears, not the application).

Of course, sometimes you are not writing an application but a program that lets
the user interact with the computer in a different way to enable assistive
devices or just new hardware.

There are undocumented (near as I can tell) functions in IOKit for posting HID
events, including setting the mouse location. In
/System/Library/Frameworks/IOKit.framework/Headers/hidsystem/IOHIDLib.h there
are the functions IOHIDPostEvent() and IOHIDSetMouseLocation(). I haven't found
any documentation on these, but Google does find some code using them.

Googling around a bit more, however, I see that the Quartz Event Services is
documented and provides similar functionality. The DarwiinRemote project has a
mouse emulation mode for the Nintendo Wii controller that uses this API. It's
only available in OSX 10.4, however.

http://developer.apple.com/documentation/Carbon/Reference/QuartzEventServicesRef/index.html

-- 
Robert Kern

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



From care02 at gmail.com  Fri Aug 24 06:32:12 2007
From: care02 at gmail.com (care02 at gmail.com)
Date: Fri, 24 Aug 2007 03:32:12 -0700
Subject: How to minimize command window when running wxPython script
Message-ID: <1187951532.156581.25680@e9g2000prf.googlegroups.com>

Dear friends,

I have almost completed my first wxPython application. The only thing
I need now is to minimize the command window. How is this accomplished
on Win32? What about Mac and Linux?

Carl



From shahargs at gmail.com  Thu Aug  9 08:58:22 2007
From: shahargs at gmail.com (shahargs at gmail.com)
Date: Thu, 09 Aug 2007 05:58:22 -0700
Subject: check if regeular expression has results
Message-ID: <1186664302.050036.302670@g4g2000hsf.googlegroups.com>

Hi,
I'm looking for the best way to check if regular expression return
true (it's mean - there is a match). for example, i want "if" that
check if this regular expression: .*born.*to.* has a match.

What's the way to do that simply?

Thanks a lot,
Shahar.



From s.mientki at mailbox.kun.nl  Wed Aug  8 19:49:18 2007
From: s.mientki at mailbox.kun.nl (stef mientki)
Date: Thu, 09 Aug 2007 01:49:18 +0200
Subject: some import / namespace questions
In-Reply-To: <5hu7kdF3md0abU4@mid.uni-berlin.de>
References: <mailman.1745.1186585520.22759.python-list@python.org>
	<5hu7kdF3md0abU4@mid.uni-berlin.de>
Message-ID: <46BA567E.5060503@gmail.com>

Marc 'BlackJack' Rintsch wrote:
> On Wed, 08 Aug 2007 17:11:19 +0200, stef mientki wrote:
>
>   
>> Now it's not possible to import in the existing modules the main plugin, 
>> like
>>    from Main_User import *
>> because this will start the infinite loop.
>>     
>
> Which means there's code at the module level. 
yes
>  Tell the users to put that
> into a function, then you can import the module without executing this
> main loop.
>   
ok, I'll do that for the user (the user writes in another language),
and indeed it works,
but has one disadavantage ... see below
> And don't do a * import because your users might use names that the
> importing module uses already and which would get replaced by the * import.
>
>   
Yes that's a principal problem with this program, for which I've no 
(simple) solution.
I'm simulating a microprocessor language here, where "globality"  is an 
essential part of the language.
So I'll have to stick to import *, (although I'm aware it's not a good 
programming method, especially in user plug-ins)
and now the problem is that I get a warning that import * is only 
allowed at the module level :-(
But despite the warning it's still working. ;-)

cheers,
Stef Mientki



From daniels at dsl-only.net  Mon Aug 27 23:51:50 2007
From: daniels at dsl-only.net (Scott David Daniels)
Date: Mon, 27 Aug 2007 20:51:50 -0700
Subject: Biased random?
In-Reply-To: <favd0c$fcu$1@ss408.t-com.hr>
References: <favd0c$fcu$1@ss408.t-com.hr>
Message-ID: <13d76tr71a7a5f1@corp.supernews.com>

Ivan Voras wrote:
> I have a list of items, and need to choose several elements from it,
> "almost random". The catch is that the elements from the beginning
> should have more chance of being selected than those at the end (how
> much more? I don't care how the "envelope" of probability looks like at
> this point - can be linear). I see that there are several functions in
> Python standard libraries for various distribution, but is there an easy
> pythonic way to make them do what I need?

import random

def choose(samples, **kwargs):
     total = sum(kwargs.values())
     result = []
     for n in range(samples):
	choice = random.random() * total
         for key, weight in kwargs.iteritems():
             choice -= weight
             if choice <= 0:
                 result.append(key)
                 total -= kwargs.pop(key)
                 break
         else:
             raise ValueError('Too many samples taken from the universe')
     return result

print choose(3, a=1, b=2, c=2, d=1, e=3)


-Scott David Daniels
Scott.Daniels at Acm.Org


From oliver-at-hallmarkins.net  Thu Aug 16 18:24:55 2007
From: oliver-at-hallmarkins.net (Oliver Nelson)
Date: Thu, 16 Aug 2007 15:24:55 -0700
Subject: Canceling events from COM Objects
Message-ID: <46c4cecc$0$17203$39cecf19@news.twtelecom.net>

I have MapPoint working in Python, and I'm trying to cancel events on 
the map, but I can't seem to make that happen.  I'm responding to the 
events successfully in my panel object.  My code is like this:

global MapPointMod
MapPointMod = 
win32com.client.gencache.EnsureModule("{51C0A9CA-F7B7-4F5A-96F4-43927C6FA50F}", 
0, 1, 0)

class MyPanel(wx.Panel):
     def __init__(self, *args, **kwds):
         # begin wxGlade: MyPanel.__init__
         kwds["style"] = wx.TAB_TRAVERSAL
         wx.Panel.__init__(self, *args, **kwds)
         self.frame = args[0]

         MyMap = MakeActiveXClass(MapPointMod.MappointControl, 
eventObj=self)
         self.window_1 = MyMap(self, -1)
         self.window_1.OpenMap("C:\\TEMP\\GPS_ON.ptt")
...
...
     def OnBeforeClick(self, Button, Shift, X, Y, Cancel):
         print "tada"


My event fires just fine, but I can't seem to figure out how to cancel 
the event so that mappoint doesn't do its stuff with it...I've tried 
setting Cancel based on the mappoint specs, but it doesn't seem to get 
sent back anywhere...

Any ideas please?

Thanx,

OLIVER


From newsreturns at biszumknie.de  Mon Aug 27 08:31:13 2007
From: newsreturns at biszumknie.de (Andreas Lobinger)
Date: Mon, 27 Aug 2007 14:31:13 +0200
Subject: expat error, help to debug?
In-Reply-To: <farjd8$51g$1@lust.ihug.co.nz>
References: <fak7q4$ahn$1@daniel-new.mch.sbs.de> <farjd8$51g$1@lust.ihug.co.nz>
Message-ID: <faug6k$pmo$1@daniel-new.mch.sbs.de>

Aloha,

Lawrence D'Oliveiro wrote:
> In message <fak7q4$ahn$1 at daniel-new.mch.sbs.de>, Andreas Lobinger wrote:
>>Anyone any idea where the error is produced?

> Do you want to try adding an EndElementHandler as well, just to get more
> information on where the error might be happening?

I want.

Adding an EndElement (left as an exercise to the user) handler the
output looks like this:
[42] scylla(scylla)> python pbxml.py s3.xml
s 7 book {}
x bookinfo bookinfo.xml None
s 9 chapter {u'id': u'technicalDescription'}
s 9 title {}
e title
s 10 para {}
e para
e chapter
e book
Traceback (most recent call last):
   File "pbxml.py", line 29, in ?
     fromxml(sys.argv[1])
   File "pbxml.py", line 24, in fromxml
     p.ParseFile(file(fname))
TypeError: an integer is required

which shows me that the error is caused after parsing the /book ...
BUT still within p.ParseFile (expat internal), so i can't look
into it.

The example here may be missleading. It was stripped down from
a quite large docbook.xml and there ther error happened in the
middle of the document, not at the end.

Wishing a happy day,
		LOBI


From mail at microcorp.co.za  Wed Aug  1 04:37:36 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 1 Aug 2007 10:37:36 +0200
Subject: Process Control Help
References: <1185808072.695752.20720@z28g2000prd.googlegroups.com>
	<46AF9158.4030002@ace-net.com>
Message-ID: <014501c7d418$331a1740$03000080@hendrik>


"Walt Leipold" <lei...e-net.com> wrote:

8<--------------- summary of state of the art -------------

> (Wow, that was a depressing post to write.)

Cheer up! - The end is nigh! 

Warning:
The rest of this post is barely on topic for python,
and contains some shameless self advertising. Its
probably bad for your health too.

I have just spent considerable time developing some stuff.

I call it SDCL - simple distributed control language

Its a simple scripting language, that is interpreted.

The HMI bits are python, the "compiler" is python, 
the simulator is python, the interpreter in the PC is
python.  What is not python is the interpreter in the 
PLC - that is a mix of Assembler and C, for speed.

You can run the code either in the PC, or in the PLC,
or as a mix of both - obviously fast stuff needs to run
in the real hardware, but a lot of the control, checking
and sequencing functions fall naturally into the PC.  
With the PC logging, you get ISO 900x almost 
automatically, as any change to a variable that lives in 
the PC is logged.

The language is still a bit "brain dead" - it implements a
virtual Reverse Polish Notation stack machine and reads 
like assembler, with less than 40 instructions to learn.

A real compiler is planned for some unspecified future time.

The first app is an injection moulding machine, and it has
been working for some months now, with crude animation
of the machine's motions on screen, and everything from
star-delta timing to thermocouple heating inputs and control,
as well as screw position and injection pressure sensing on 
the PLC.

There are just over 3000 instructions in the sequence to 
control this machine, and the "address space" is 64k of
instructions - so it is aimed at fairly serious control.

Unfortunately at this stage the "PLC" is Microcorp proprietary.

But the whole thing is aimed at simplifying the problem of 
putting voltages on wires and reporting the results to a PC.

I intend to open the spec as soon as I am satisfied that there
are no fearsome dragons left lurking in the code or the design.

- Hendrik




From python at jayloden.com  Tue Aug  7 17:29:00 2007
From: python at jayloden.com (Jay Loden)
Date: Tue, 07 Aug 2007 17:29:00 -0400
Subject: Web based Reporting tool for Python
In-Reply-To: <1186460956.945148.162610@k79g2000hse.googlegroups.com>
References: <1186460956.945148.162610@k79g2000hse.googlegroups.com>
Message-ID: <46B8E41C.9080608@jayloden.com>

Madhu Alagu wrote:
> I am looking template based report tools for python.It has the ability
> to deliver rich content onto the screen, to the printer or into PDF,
> HTML, XLS, CSV and XML files.

As others have mentioned, I don't believe that all of the above is implemented
in a single package. However, Python can most definitely deal with all of the
above formats.

For HTML templating I can highly recommend Clearsilver:
http://www.clearsilver.net/ it's written in C with Python (and other language)
wrappers, is very fast and is also extensible.

For PDF:
ReportLab - http://www.reportlab.org/downloads.html
          - http://www.ibm.com/developerworks/linux/library/l-sc6.html?loc=dwmain

For XSLT:
4Suite, libxml - http://uche.ogbuji.net/tech/akara/nodes/2003-01-01/python-xslt

For CSV and XML:
csv module, libxml, lxml, ElemenTree modules

-Jay


From carymac20 at gmail.com  Sat Aug 18 01:32:26 2007
From: carymac20 at gmail.com (cary)
Date: Fri, 17 Aug 2007 22:32:26 -0700
Subject: save $ 90 Per Month On Your Entertainment
Message-ID: <1187415146.548947.133080@e9g2000prf.googlegroups.com>

Fed Up With Paying a Monthly Fee For A Handful of Channels That Don't
Satisfy Your Needs?
 -
Most people pay $19 to $90 a month for a very limited number of TV
channels. If you fall into this category and want out, you have a
solution at the link below....

http://satellitetv.110mb.com/



Now, It is possible to watch 1000's of Satellite Channels on the PC
for Free!. You pay a one time fee and have instant access to 1000's of
Satellite Channels including Sports, Movies, News, Music and
International stations. Among these categories are premium channels
like HBO, ESPN, MTVU, BBC, NBC & many more. All these premium channels
are included in all of the products you see below!


Many people believe this type of software is a scam because it sounds
too good to be true. But if that was the case they wouldn't be
offering 100% money back guarantees!


Please read Top Satellite TV on PC program below...



From bj_666 at gmx.net  Thu Aug 23 05:42:50 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 23 Aug 2007 09:42:50 GMT
Subject: Raw strings to normal strings conversion?
References: <1187851660.209024.59860@l22g2000prc.googlegroups.com>
	<Xrbzi.21051$eY.3412@newssvr13.news.prodigy.net>
	<1187860900.740674.87180@e9g2000prf.googlegroups.com>
Message-ID: <5j534qF3qf8ssU2@mid.uni-berlin.de>

On Thu, 23 Aug 2007 09:21:40 +0000, Nagarajan wrote:

> On Aug 23, 1:21 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
>> Nagarajan wrote:
>> > Is there a way by which I could obtain normal string form of a raw
>> > string.
>> > XML CDATA is returned as raw string. But I need the string to actually
>> > escape special chars.
>>
>> > Any idea?
>>
>> This doesn't seem clear. Perhaps an example of what you get and what you
>> want it converted to.
> 
> Here is an example:
>>> rawstr = r'a\nb'
>>> print rawstr
> a\nb
> 
> Now I need this newstr to actually interpret '\n', in other words, to
> behave like a normal string.

So you get a string with Newlines as two character sequence \n.  You don't
get "raw" strings.  That is a concept in Python source code.  When the
program is running there is no such distinction between "raw" and "normal"
strings.  Here's a solution:

In [87]: print r'a\nb'
a\nb

In [88]: print r'a\nb'.decode('string-escape')
a
b

Ciao,
	Marc 'BlackJack' Rintsch


From michael at jedimindworks.com  Mon Aug 20 06:07:34 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Mon, 20 Aug 2007 03:07:34 -0700
Subject: Where we need to use Python ?
In-Reply-To: <1187596936.136499.200280@l22g2000prc.googlegroups.com>
References: <1187596936.136499.200280@l22g2000prc.googlegroups.com>
Message-ID: <5A5F2F2E-3B7D-4B5E-94A0-19F540C111B9@jedimindworks.com>


On Aug 20, 2007, at 1:02 AM, gperumal at gmail.com wrote:

> And Is it a interpreted language or a programming language
> It comes in which category
>
> I very keen to know this please tell

[ open on suburban kitchen, Wife and Husband arguing ]

Wife: New Shimmer is a floor wax!

Husband: No, new Shimmer is a dessert topping!

Wife: It's a floor wax!

Husband: It's a dessert topping!

Wife: It's a floor wax, I'm telling you!

Husband: It's a dessert topping, you cow!

Spokesman: [ enters quickly ] Hey, hey, hey, calm down, you two. New  
Shimmer is both a floor wax and a dessert topping! Here, I'll spray  
some on your mop.. [ sprays Shimmer onto mop ] ..and some on your  
butterscotch pudding. [ sprays Shimmer onto pudding ]

[ Husband eats while Wife mops ]

Husband: Mmmmm, tastes terrific!

Wife: And just look at that shine! But will it last?

Spokesman: Hey, outlasts every other leading floor wax, 2 to 1. It's  
durable, and it's scuff-resistant.

Husband: And it's delicious!

Spokesman: Sure is! Perks up anything from an ice cream sundae to a  
pumpkin pie!

Wife: Made from an exclusive non-yellowing formula.

Husband: I haven't even touched my pudding and I'm ready for more!

Wife: But what about black heel marks?

Spokesman: Dirt, grime, even black heel marks, wipe clean with a damp  
mop.

[ Husband accidentally sprays Shimmer onto the floor ]

Husband: Oh, sorry, honey, I'll clean that up!

Wife: Oh, no problem, sweetheart, not with new Shimmer!

[ Spokesman laughs continuously as he approaches the camera ]

Spokesman: New Shimmer, for the greatest shine you ever tasted!

Ducking,
Michael
---
"If we had asked people what they wanted they would have said 'a  
faster horse'."  --Henry Ford




From vedrandekovic at v-programs.com  Wed Aug 22 02:38:09 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Tue, 21 Aug 2007 23:38:09 -0700
Subject: redirect or cover .bat log
Message-ID: <1187764689.836375.212730@z24g2000prh.googlegroups.com>

Hello,

e.g I need run my my_scripts_setup.bat that contain:

python myscript_setup.py py2exe


Can I cover or redirect log of that process into my wx program?
I'am using Windows XP SP2, and Python 2.5.




Regards,
Vedran



From zzbbaadd at aol.com  Thu Aug 30 14:45:25 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Thu, 30 Aug 2007 11:45:25 -0700
Subject: list index()
In-Reply-To: <mailman.156.1188498891.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<1188496588.750629.208100@g4g2000hsf.googlegroups.com>
	<mailman.154.1188497511.28954.python-list@python.org>
	<1188498073.997168.282420@q5g2000prf.googlegroups.com>
	<mailman.156.1188498891.28954.python-list@python.org>
Message-ID: <1188499525.827573.128170@x35g2000prf.googlegroups.com>


> That wish will only come true if you maintain your own fork of Python 3.
> has_key() will go away, period. It has been made obsolete by "in", which
> is faster and more concise.

Is there really some reason  "key" IN dict can be implemented faster
than dict.has_key("key")???





From steven.bethard at gmail.com  Fri Aug 17 13:56:03 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 17 Aug 2007 11:56:03 -0600
Subject: unexpected optparse set_default/set_defaults behavior
In-Reply-To: <1187359921.637383.268380@22g2000hsm.googlegroups.com>
References: <1187359921.637383.268380@22g2000hsm.googlegroups.com>
Message-ID: <Gv-dnflklq-ofFjbnZ2dnUVZ_qmlnZ2d@comcast.com>

mbeachy at gmail.com wrote:
> Some rather unexpected behavior in the set_default/set_defaults
> methods for OptionParser that I noticed recently:
> 
>>>> import optparse
>>>> parser = optparse.OptionParser()
>>>> parser.add_option("-r", "--restart", dest="restart", action="store_true")
> <Option at 0x-483b3414: -r/--restart>
>>>> parser.defaults
> {'restart': None}
>>>> parser.set_default("retart", False)
>>>> parser.defaults
> {'retart': False, 'restart': None}
> 
> Why does set_default not raise an exception when passed a key that it
> doesn't recognize?
> 
> Bad typysts bewaer.
> 
> The only reason I can think not to raise an exception is so that
> defaults can be defined before the options are added. Is there some
> use case that I'm not thinking of here?

I'm not really sure what other use case there is with optparse, but 
argparse has the same behavior because sometimes it's useful to store 
values that can't be changed by anything on the command line. This is 
particularly useful when you're dealing with sub-commands::

     >>> import argparse
     >>> parser = argparse.ArgumentParser()
     >>> subparsers = parser.add_subparsers()

     # set up the foo parser, adding a static "func" default
     >>> foo_parser = subparsers.add_parser('foo')
     >>> foo_parser.set_defaults(func=lambda: 'do something for foo')
     >>> foo_parser.add_argument('--foo')

     # set up the bar parser, adding a staic "func" default
     >>> bar_parser = subparsers.add_parser('bar')
     >>> bar_parser.set_defaults(func=lambda: 'do something for bar')
     >>> bar_parser.add_argument('bar')

     # parse the arguments and call whichever "func" was selected
     >>> args = parser.parse_args(['bar', '13'])
     >>> args.func()
     'do something for bar'

I know optparse doesn't support sub-commands, but I can imagine that if 
you were trying to hack optparse to do something similar you might find 
it useful to be able to specify defaults that weren't ever set by 
anything at the command line.

STeVe


From python at jayloden.com  Thu Aug  2 15:09:20 2007
From: python at jayloden.com (Jay Loden)
Date: Thu, 02 Aug 2007 15:09:20 -0400
Subject: XML Processing
In-Reply-To: <1186081434.012668.206770@z24g2000prh.googlegroups.com>
References: <1186080339.344993.167670@z24g2000prh.googlegroups.com>
	<1186081434.012668.206770@z24g2000prh.googlegroups.com>
Message-ID: <46B22BE0.7080006@jayloden.com>

kyosohma at gmail.com wrote:
> On Aug 2, 1:45 pm, Roman <rgelfa... at hotmail.com> wrote:
>> Is there a package that converts a string that contains special
>> characters in xml to to literal value.  For instance, converts stringhttp://myhome/&paramtohttp://myhome/&param.
>>
>> Thanks in advance
> 
> I've seen examples using the HTMLgen module. But here's another script
> I just found:
> 
> http://mail.python.org/pipermail/python-list/1999-November/016814.html
> 
> I would think that you could use regular expressions too.
> 
> Mike

I would reccommend against using the example above or using regular expressions, since both are likely to miss corner cases, and the stdlib has an encode function that's already designed for this task

http://docs.python.org/lib/module-xml.sax.saxutils.html

The encode() function in xml.sax.saxutils also is extensible, should you run into any entities that it fails to escape in the current implementation.

-Jay



From ricaraoz at gmail.com  Wed Aug 29 14:50:19 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Wed, 29 Aug 2007 15:50:19 -0300
Subject: copying files
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE30C@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE30C@efmailx>
Message-ID: <46D5BFEB.6060606@bigfoot.com>

Brian McCann wrote:
> Hi,
>  
> with the code below I set a variable TEST_HOME to a path and the
> variable m to a path
> in my current dir.
> I have a symbolic link setting m---->lib
> when I run the script I get no errors and the lib dir with its 20 files
> does not get copied to /v01/test_home
> any help would be greatly appreciated
>  
> --Brian
> 
> #!/usr/bin/python
> import string
> import os
> import sys
> import errno
> import shutil
> import tarfile
>  
> TEST_HOME = "/v01/test_home"
> m = "./lib"
> os.system("cp -r m TEST_HOME")
> #os.system("tar -cvf viziant-ingestion.tar /v01/")
>  

Maybe os.system("cp -r " + m + TEST_HOME) ?



From paddy3118 at googlemail.com  Sat Aug 18 07:39:32 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 18 Aug 2007 11:39:32 -0000
Subject: Naming dictionaries recursively
In-Reply-To: <1187433896.851472.246150@r34g2000hsd.googlegroups.com>
References: <1187354296.177606.273300@22g2000hsm.googlegroups.com>
	<5ilkebF3oltfoU2@mid.uni-berlin.de>
	<1187361791.979162.46330@22g2000hsm.googlegroups.com>
	<1187376847.158312.234560@w3g2000hsg.googlegroups.com>
	<1187433896.851472.246150@r34g2000hsd.googlegroups.com>
Message-ID: <1187437172.431917.169000@o80g2000hse.googlegroups.com>

On Aug 18, 11:44 am, TYR <a.harrow... at gmail.com> wrote:
> That sounds like a solution. I think the core of the question is as
> follows; if I was to call the dict() function for each line, thus
> creating a dictionary, and then rename it to dict['name'], will there
> be a namespace collision on the next loop when dict() is called again?
> Obviously the first dictionary will still be there, as it still has a
> refcount of 1; but if it gets overwritten, will the object that the
> new name refers to be overwritten too?

if data2name might give colliding names then you could use tuples as
dictionary keys as shown below:

  import modulename
  datadict = dict( ((data2name(d), count), d)
    for count,d in enumerate(modulename.data) )

Generally, if you try and create two keys with the same name in a
dictionary, they will clash and only the second value is retained.

- Paddy.



From fabioztessitore at libero.it  Tue Aug 21 03:44:46 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 21 Aug 2007 07:44:46 GMT
Subject: Is there a way to change the default string encoding?
References: <rNOSPAMon-7D5934.18443820082007@news.gha.chartermi.net>
Message-ID: <46ca97ee$0$4789$4fafbaef@reader4.news.tin.it>

Il Mon, 20 Aug 2007 18:44:39 -0700, Ron Garret ha scritto:

> Is there a way to change the default string encoding ...

Dive Into Python. Section 9 on http://diveintopython.org/xml_processing/
unicode.html

That will help.

Bye
Fabio


From __peter__ at web.de  Wed Aug 15 16:19:30 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 15 Aug 2007 22:19:30 +0200
Subject: "Variable variable name" or "variable lvalue"
References: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
Message-ID: <f9vn4l$d6n$02$1@news.t-online.com>

mfglinux wrote:

> Hello to everybody
> 
> I would like to know how to declare in python a "variable name" that
> it is in turn a variable
> In bash shell I would wrote sthg like:
> 
> for x in `seq 1 3`
> do
>   M$i=Material(x)  #Material is a python class
> done

In Python you would build a list instead of inventing variable names:

    numbers = [12.5, 25, 12.5]
    materials = []
    for x in numbers:
        materials.append(Material(x))


> Why I need this? Cause I have a python module that obliges me to build
> a variable called Period, which should have a variable name of
> summands (depends on the value of x)
> 
> #Let's say x=3, then Period definition is
> Period=Slab(Material1(12.5)+Material2(25)+Material3(12.5)) #Slab is a
> python class
> 
> I dont know how to automatize last piece of code for any x

You can use another loop to to "sum" over the materials and then feed the
result to the Slab constructor:

    accu = materials[0]
    for material in materials[1:]:
        accu += material
    period = Slab(accu)

If you want to simplify things somewhat you can merge the two loops into
one:

    numbers = [12.5, 25, 12.5]
    accu = Material(numbers[0])
    for x in numbers[1:]:
        accu += Material(x)
    period = Slab(accu)

Or you try your hands on a bit of functional programming:

    from operator import add
    numbers = [12.5, 25, 12.5]
    period = Slab(reduce(add, (Material(x) for x in numbers)))

Peter


From nmm1 at cus.cam.ac.uk  Fri Aug 24 09:36:00 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 24 Aug 2007 13:36:00 GMT
Subject: Regular expression use
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
	<famlj0$33k$1@mlucom4.urz.uni-halle.de>
Message-ID: <famms0$em2$1@gemini.csx.cam.ac.uk>


In article <famlj0$33k$1 at mlucom4.urz.uni-halle.de>,
Mirco Wahab <wahab-mail at gmx.net> writes:
|> 
|> Using complex regular expressions is like tank destruction
|> with contact charges glued on them.  Only a few people
|> will even survive the first "usage", but survivors will
|> then eventually be able to destroy almost every tank with
|> tremendous speed and precision.

I must remember that!  It is nicely put.

|> On business software projects, maintainability is a key
|> prerequisite - after using complex regular expressions
|> on business critical parts you are bound to involve
|> very very expensive maintenance programmers ... :)

Yes :-)  Even regular expression experts have major problems
ensuring that complicated ones match everything that they need
to and nothing that they don't.  The same thing applies to
uses of the C preprocessor and many uses of Perl ....

|> What exactly did you "hear" of several "uses"?  Which
|> application? Academia, Business, ...?

Mainly academic research, but that still covers many fields.
However, I am not and never have been a 'pure' academic, and
am as interested in other uses as in academic research.


Regards,
Nick Maclaren.


From nospam at invalid.com  Fri Aug 24 16:21:44 2007
From: nospam at invalid.com (Jack)
Date: Fri, 24 Aug 2007 13:21:44 -0700
Subject: Parser Generator?
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
	<1187834836.115735.111160@e9g2000prf.googlegroups.com>
Message-ID: <qKudneA2bKtKoFLbnZ2dnUVZ_vKunZ2d@comcast.com>

Thanks Jason. Does Parsing.py support Unicode characters (especially CJK)?
I'll take a look.

"Jason Evans" <joevans at gmail.com> wrote in message 
news:1187834836.115735.111160 at e9g2000prf.googlegroups.com...
> On Aug 18, 3:22 pm, "Jack" <nos... at invalid.com> wrote:
>> Hi all, I need to do syntax parsing of simple naturual languages,
>> for example, "weather of London" or "what is the time", simple
>> things like these, with Unicode support in the syntax.
>>
>> In Java, there are JavaCC, Antlr, etc. I wonder what people use
>> in Python? Antlr also has Python support but I'm not sure how good
>> it is. Comments/hints are welcome.
>
> I use Parsing.py.  I like it a lot, probably because I wrote it.
>
>    http://www.canonware.com/Parsing/
>
> Jason
> 




From gigs at hi.t-com.hr  Wed Aug 29 13:24:54 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Wed, 29 Aug 2007 19:24:54 +0200
Subject: cgi
Message-ID: <fb4a57$ojf$1@ss408.t-com.hr>

i have simple page and form that ask for name and color and cgi script that 
print that name in another page and background in chosen color

all the time this error pop:
Error response

Error code 501.

Message: Can only POST to CGI scripts.

Error code explanation: 501 = Server does not support this operation.

i run it on windows xpand this is server that i use:

webdir = '.'
port   = 80

import os, sys
from BaseHTTPServer import HTTPServer
from CGIHTTPServer  import CGIHTTPRequestHandler

os.chdir(webdir)
srvraddr = ("", port)
srvrobj  = HTTPServer(srvraddr, CGIHTTPRequestHandler)
srvrobj.serve_forever()

can someone help me?



thanks!


From jura.grozni at gmail.com  Thu Aug 30 15:21:47 2007
From: jura.grozni at gmail.com (azrael)
Date: Thu, 30 Aug 2007 19:21:47 -0000
Subject: Pivy problem and some other stuff
Message-ID: <1188501707.593319.23330@m37g2000prh.googlegroups.com>

Hy Guys

Did anyone manage to install and use Pivy. I'm trying it and cant come
closer to the goal I get the message:
Please set the COIN3DDIR environment variable to your Coin root
directory! ** Aborting **

Familiar to anyone?

And there is anoher question in my mind.
 Is there a way to make a list in python which contains a series of
functions. I did'n try it. Something like:
>>>def a():
>>>  return 1

>>>def b():
>>>   return 2

>>>def c():
>>>   return 3

>>>def d():
>>>   return 4

>>> list=[a(),b(),c(),d()]
>>> list
[1,2,3,4]

I kow that for this kind of stuff this in not neccesarry, but for
other suff it, gets interesting.



From kj7ny at nakore.com  Wed Aug  8 00:45:12 2007
From: kj7ny at nakore.com (kj7ny)
Date: Tue, 07 Aug 2007 21:45:12 -0700
Subject: How can I programmatically find the name of a method from within that
	method?
Message-ID: <1186548312.672360.259100@q3g2000prf.googlegroups.com>

Is there a way that I can programmatically find the name of a method I
have created from within that method?  I would like to be able to log
a message from within that method (def) and I would like to include
the name of the method from which it was written without having to
hard-code that value in every message string.  While we're at it, is
there a way to programmatically get the name of the class and the
module while I'm at it?

Thanks,



From laurent.pointal at wanadoo.fr  Thu Aug  2 16:06:23 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Thu, 02 Aug 2007 22:06:23 +0200
Subject: Email
References: <1186076005.729346.327140@z24g2000prh.googlegroups.com>
Message-ID: <46b2393f$0$27409$ba4acef3@news.orange.fr>

Rohan wrote:

> I was wondering if there could be an arrangement where a file could be
> attached and send as an email.
> For ex
> f = open(add.txt,w)
> f.write('python')
> f.close()
> 
> Now I would like to send an email with add.txt as an attachment, is it
> possible ?
> some one give me a pointer towards this.

You can use iMailer as an example script to get parts:

http://nojhan.free.fr/article.php3?id_article=22

A+

Laurent.



From infocat at earthlink.net  Sat Aug  4 00:49:12 2007
From: infocat at earthlink.net (Frank Swarbrick)
Date: Fri, 03 Aug 2007 22:49:12 -0600
Subject: (no) fast boolean evaluation ?
In-Reply-To: <mailman.1545.1186095368.22759.python-list@python.org>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<mailman.1545.1186095368.22759.python-list@python.org>
Message-ID: <5hieqfF3kl3voU1@mid.individual.net>

Ian Clark wrote:
> Stef Mientki wrote:
>> hello,
>>
>> I discovered that boolean evaluation in Python is done "fast"
>> (as soon as the condition is ok, the rest of the expression is ignored).
>>
>> Is this standard behavior or is there a compiler switch to turn it 
>> on/off ?
> 
> It's called short circuit evaluation and as far as I know it's standard 
> in most all languages. This only occurs if a conditional evaluates to 
> True and the only other operators that still need to be evaluated are 
> 'or's or the condition evaluates to False and all the other operators 
> are 'and's. The reason is those other operators will never change the 
> outcome: True or'd with any number of False's will still be True and 
> False and'ed to any number of Trues will still be False.
> 
> My question would be why would you *not* want this?

Pascal, and apparently Fortran, do not use short-circuit evaluation.  I 
remember learning this gotcha in my seventh-grade Pascal class (plus I 
just googled it to make sure my memory was correct!).

Frank


From tommy.nordgren at comhem.se  Mon Aug 13 08:43:12 2007
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Mon, 13 Aug 2007 14:43:12 +0200
Subject: Adventure-Engines in Python
In-Reply-To: <46C0255A.4080707@freakmail.de>
References: <46C0255A.4080707@freakmail.de>
Message-ID: <1536BB4D-1D56-4A6C-BD49-287C87F683FC@comhem.se>


On 13 aug 2007, at 11.33, Wildemar Wildenburger wrote:

> Are there any?
>
> I've set out to make an adventure game and now I'm trying to find a  
> set
> of python-modules to help me do that. I know of the usual non-python
> suspects (AGAST, AGS, Wintermute, ...) and while I they are really  
> good,
> I'd like one that is cross platform.
>
> I've found pyScumm and pyAdv but both don't seem to be ready for use
> yet. So are there any "usable" engines written in python?
>
> /W
> -- 
> http://mail.python.org/mailman/listinfo/python-list
	I don't know of any adventure engines in Python,
bet there is an open-source language and class library for text  
adventures called TADS
(www.tads.org) The syntax is similar to C++ and Java.
Tads have been ported to ALL major platforms
-------------------------------------
This sig is dedicated to the advancement of Nuclear Power
Tommy Nordgren
tommy.nordgren at comhem.se





From ricaraoz at gmail.com  Sun Aug 26 08:09:58 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sun, 26 Aug 2007 09:09:58 -0300
Subject: How can I use python for file processing
In-Reply-To: <5jcm63F3rgkhtU1@mid.uni-berlin.de>
References: <1188108311.154118.229610@50g2000hsm.googlegroups.com>
	<5jcm63F3rgkhtU1@mid.uni-berlin.de>
Message-ID: <46D16D96.6000107@bigfoot.com>

Marc 'BlackJack' Rintsch wrote:
> On Sun, 26 Aug 2007 06:05:11 +0000, yinglcs at gmail.com wrote:
> 
>> I am trying to use python for file processing.
>> Suppose I have a file like this:
>> I want to build a Hashmap between the line "begin_QOS_statistics" and
>> "end_QOS_statistics"
>> and for each line I want to put the first text as the key of the hash
>> table and the second text as the value.
> 
> Work through the tutorial, experiment a little in the interactive
> interpreter and then just do it.  You need to `open()` the file, iterate
> over its lines in a ``for``-loop, decide to when it is time to start
> processing lines, and then `str.split()` the lines and put them into a
> `dict()`.  This is a neat little project to start learning the language.
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch

Just posted this on Python Tutor, might give you a start :

nameFile = open(r'/path/to/file.txt', 'rU')
phonebook = {}

for line in nameFile :
    phonebook.setdefault(line[0].upper(), []).append(line.strip('\n'))

for item, names in phonebook.iteritems() :
    names.sort()

print phonebook

HTH



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Aug 29 10:38:54 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 29 Aug 2007 16:38:54 +0200
Subject: strange list comprehension on generator
References: <mailman.105.1188396882.28954.python-list@python.org>
Message-ID: <5jlenuF64j4U1@mid.individual.net>

No greeting, no text? Pity.

Roland Puntaier wrote:

> def changeOne(aa,idx):
>   aa[idx]=not aa[idx]
>   yield aa
>   for i in range(idx):
>     for x in changeOne(aa,i):
>       yield x
> 
> def changeOneOrder(aa):
>   yield aa
>   for i in range(len(aa)):
>     for x in changeOne(aa,i):
>       yield x

Okay, two generator definitions.
 
> a=[False]*3
> og=changeOneOrder(a)
> #this does not return the way I would expect. why?

What do you expect? You created a generator object and bound it
to "og".

Please always state what you expect and what really happens. Fortune
telling is not one of my hobbies (and I think I'm not alone with
that).

Regards,


Bj?rn

-- 
BOFH excuse #284:

Electrons on a bender



From anadajames at gmail.com  Fri Aug  3 14:44:34 2007
From: anadajames at gmail.com (Ana James)
Date: Fri, 03 Aug 2007 11:44:34 -0700
Subject: =?utf-8?B?4pa64pa64pa6R2V0IEZSRUUgU2F0ZWxsaXRlIFRWIG9uIHlvdXIgUEMg4peE4peE4peE?=
Message-ID: <1186166674.742066.271280@d30g2000prg.googlegroups.com>

Watch Satellite TV On Your Computer Without Paying Monthly Fees... FOR
FREE?

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From aleax at mac.com  Fri Aug 31 11:56:20 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 31 Aug 2007 08:56:20 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<1188547369.428712.194430@x35g2000prf.googlegroups.com>
	<1188552665.363115.175310@x35g2000prf.googlegroups.com>
Message-ID: <1i3pb3z.167mjis1y7kp3rN%aleax@mac.com>

Michele Simionato <michele.simionato at gmail.com> wrote:
   ...
> I would not call that an attack. If you want to see an attack, wait
> for
> Alex replying to you observations about the low quality of code at
> Google! ;)

I'm not going to deny that Google Groups has glitches, particularly in
its user interface (that's why I'm using MacSOUP instead, even though
Groups, were it perfect, would offer me a lot of convenience).

We have a LOT of products (see
<http://www.google.com/intl/en/options/index.html>, plus a few more at
<http://labs.google.com/>;
<http://en.wikipedia.org/wiki/List_of_Google_products> for an overview,
<http://searchengineland.com/070220-091136.php> for a list of more
lists...), arguably too many in the light of the "It's best to do one
thing really, really well" ``thing we've found to be true''; given the
70-20-10 rule we use (we spend 70% of our resources on search and ads
[and of course infrastructure supporting those;-)], 20% on "adjacent
businesses" such as News, Desktop and Maps, 10% on all the rest
combined), products in the "other" (10%) category may simply not receive
sufficient time, resources and attention.

We've recently officially raised "Apps" to the status of a third pillar
for Google (after Search and Ads), but I don't know which of our many
products are officially within these pillar-level "Apps" -- maybe a good
starting hint is what's currently included in the Premier Edition of
Google Apps, i.e.: Gmail (with 99.9% uptime guarantee), Google Talk,
Google Calendar, Docs & Spreadsheets, Page Creator and Start Page.

I do notice that Google Groups is currently not in that "elite" (but
then, neither are other products we also offer in for-pay editions, such
as Google Earth and Sketchup) but I have no "insider information" as to
what this means or portends for the future (of course not: if I _did_
have insider information, I could not talk about the subject!-).

Notice, however, that none of these points depend on use of Python vs
(or side by side with) other programming languages, DbC vs (or side by
side with) other methodologies, and other such technical and
technological issues: rather, these are strategical problems in the
optimal allocation of resources that (no matter how abundant they may
look on the outside) are always "scarce" compared to the bazillion ways
in which they _could_ be employed -- engineers' time and attention,
machines and networking infrastructure, and so forth.


Alex


From jstroud at mbi.ucla.edu  Fri Aug 10 18:17:55 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 10 Aug 2007 15:17:55 -0700
Subject: Module imports during object instantiation
In-Reply-To: <mailman.1845.1186783217.22759.python-list@python.org>
References: <mailman.1845.1186783217.22759.python-list@python.org>
Message-ID: <f9io6j$p80$1@daisy.noc.ucla.edu>

Ritesh Raj Sarraf wrote:
> Hi,
> 
> I've been very confused about why this doesn't work. I mean I don't see any
> reason why this has been made not to work.
> 
> class Log:
> 
>     def __init__(self, verbose, lock = None):
> 
>         if verbose is True:
>             self.VERBOSE = True
>         else: self.VERBOSE = False
> 
> 
>         if lock is None or lock != 1:
>             self.DispLock = False
>         else:
>             self.DispLock = threading.Lock()
>             self.lock = True
> 
>         if os.name == 'posix':
>            self.platform = 'posix'
>            self.color = get_colors()
> 
>         elif os.name in ['nt', 'dos']:
>             self.platform = 'microsoft'
>             
>             try:
>                 import SomeModule
>             except ImportError:
>                 self.Set_Flag = None
>             
>             if self.Set_Flag is not None:
>                 self.color = SomeModule.get_colors_windows()
> 
>         else:
>             self.platform = None
>             self.color = None
> 
> When I create an object the "import" part never gets executed. Is there a
> reason behind it ?
> I mean I'd like to keep my class as independent as I want. So that when
> later I need to use it somewhere else, I don't need to know if it depends
> on any modules.
> 
> Currently, the way I'm left is to globally go and import the module and set
> a flag there.
> 
> 
> Ritesh

You do realize your import statement will only be called for nt and dos 
systems don't you?

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From aleax at mac.com  Sat Aug  4 22:29:10 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 4 Aug 2007 19:29:10 -0700
Subject: Efficient Rank Ordering of Nested Lists
References: <1186104049.022836.253470@e9g2000prf.googlegroups.com>
	<1i29gpw.1vh7eku1iauistN%aleax@mac.com>
	<1186279182_8217@sp12lax.superfeed.net>
Message-ID: <1i2c5qo.ynsani1aobwaN%aleax@mac.com>

Cousin Stanley <cousinstanley at gmail.com> wrote:
   ...
>       for i , item in reversed( enumerate( sorted( single_list ) ) ) :
   ...
> TypeError: argument to reversed() must be a sequence

Oops, right.  Well then,

    aux_seq = list(enumerate(sorted(single_list)))
    for i, item in reversed(aux_seq): ...

or the like.


Alex



From hat at se-162.se.wtb.tue.nl  Tue Aug 28 03:59:27 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Tue, 28 Aug 2007 09:59:27 +0200
Subject: How to parse this line of code manually
References: <1188270013.785762.9360@z24g2000prh.googlegroups.com>
	<1188271385.875677.78560@i38g2000prf.googlegroups.com>
Message-ID: <slrnfd7lev.phn.hat@se-162.se.wtb.tue.nl>

On 2007-08-28, Davy <zhushenli at gmail.com> wrote:
> On Aug 28, 11:00 am, Davy <zhushe... at gmail.com> wrote:
>> Hi all,
>>
>> It is well known that Python is appreciated for its merit of concise.
>> However, I found the over concise code is too hard to understand for
>> me.
>>
>> Consider, for instance,
>> def known_edits2(word):
>>     return set(e2 for e1 in edits1(word) for e2 in edits1(e1) if e2 in
>> NWORDS)
>>
>> Shall I understand the code in set() as
>> for e2 in edits1(e1) {
>>     if e2 in NWORDS {
>>         for e1 in edits1(word) {
>>              e2
>>         }
>>     }
>>
>> }
>>
> [SNIP]
> Hi all, I figured it myself. It is left to righ parse, right?
> So the above one is like
> for e1 in edits1(word) {
>     for e2 in edits1(e1) {
>         if e2 in NWORDS {
>             push e2 to set
>         }
>     }
> }

This is correct, although I am not sure what language you are using here, it
looks like a strange mix of Python and C to me.

>> Any suggestions are welcome!

The idea is known as List comprehension (for lists, obviously), and comes from
functional programming, Bird & Wadler used it in their book.



The notation is very close to mathematics:

 { e2 | e1: edits(word), e2: edits(e1) in NWORDS } 

or in LaTeX:

$\{ e_2 | \forall e_1: \mathrm{edits}(\mathrm{words}),
          \forall e_2: \mathrm{edits}(e_1) \in \mathrm{NWORDS} \}$

:-)

(which in words is something like: collect values e2, where e1 comes from
'edits(word)', e2 comes from 'edits(e1)', and e2 in NWORDS)


Sincerely,
Albert


From kwmsmith at gmail.com  Fri Aug  3 15:58:31 2007
From: kwmsmith at gmail.com (Kurt Smith)
Date: Fri, 3 Aug 2007 14:58:31 -0500
Subject: Strange set of errors
In-Reply-To: <c266a7930708031256h76c86358i8516a7e0238c6b7a@mail.gmail.com>
References: <fee9cfbd0708031053s6c9f70e2wc16e299a64d56d6@mail.gmail.com>
	<c266a7930708031256h76c86358i8516a7e0238c6b7a@mail.gmail.com>
Message-ID: <c266a7930708031258o48052bfet4f3d2b84c576c918@mail.gmail.com>

Sorry, forgot to "Reply to all."

On 8/3/07, Stephen Webb <sdavis.webb at gmail.com> wrote:
> Greetings all,

<<snippage>>

> Also, I've been having trouble with the plot function in matplotlib. For
> example, I enter the following in the terminal:
>
>  >>> from pylab import *
> >>> plot([1,2,3])
> [<matplotlib.lines.Line2D instance at 0x16adda30>]
>

I can help you with your second problem: matplotlib is doing what it
should, all you need to do is tell it to show() the figure you created
(with the plot on it.)  Note -- if you call the show() function, you
will turn control over to the backend (in my case, TkAgg), and lose
the ability to issue interactive commands afterwards.  A solution is
to use the ion() (stands for "interactive-on") function call before
issuing plotting commands:

>>> from pylab import *
>>> ion()
>>> plot([1,2,3])
[<matplotlib.lines.Line2D instance at 0x2cb60a8>]
>>> # image is shown here

See http://matplotlib.sourceforge.net/interactive.html for an
exhaustive explanation.

> Every time I run the plot([1,2,3]) I get a different ending number that
> seems to vary randomly.

The "[<matplotlib.lines.Line2D instance at 0x2cb60a8>]" is what the
plot() function returns -- a list of instances of the Line2D class,
and it tells you their locations in memory (hence the hex number
starting with 0x).  The hex number can be used to uniquely identify
this object, as in the id(object) call.

Hope this helps,

Kurt


From bbxx789_05ss at yahoo.com  Mon Aug 13 12:44:21 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 13 Aug 2007 09:44:21 -0700
Subject: Configuring apache to execute python scripts using mod_python
	handler
In-Reply-To: <1187003808.725705.56070@q3g2000prf.googlegroups.com>
References: <1187003808.725705.56070@q3g2000prf.googlegroups.com>
Message-ID: <1187023461.702423.53620@b79g2000hse.googlegroups.com>

On Aug 13, 5:16 am, joe jacob <joejaco... at gmail.com> wrote:
> I configured apache to execute python scripts using mod_python
> handler. I followed below mentioned steps to configure apache.
>
> 1. In http.conf I added
>
>   <Directory "D:/softwares/Apache2.2/htdocs">
>   AddHandler mod_python .py
>   PythonHandler mptest
>   PythonDebug On
>   </Directory>
>
> 2. Then I added the line "LoadModule python_module modules/
> mod_python.so" to http.conf.
>
> Then I tried execute the python script mentioned below from browser.
>
> from mod_python import apache
> def handler(req):
> req.content_type = 'text/plain'
> req.write("Hello World!")
> return apache.OK
>
> Then I am getting the following error
>
> Traceback (most recent call last):
>
>   File "D:\softwares\Python25\Lib\site-packages\mod_python
> \importer.py", line 1537, in HandlerDispatch
>     default=default_handler, arg=req, silent=hlist.silent)
>
>   File "D:\softwares\Python25\Lib\site-packages\mod_python
> \importer.py", line 1202, in _process_target
>     module = import_module(module_name, path=path)
>
>   File "D:\softwares\Python25\Lib\site-packages\mod_python
> \importer.py", line 304, in import_module
>     return __import__(module_name, {}, {}, ['*'])
>
> ImportError: No module named mptest
>
> I am using Apache 2.2.4, python 2.5 and mod_python-3.3.1.win32-py2.5-
> Apache2.2.
>
> I am able to execute python scripts by configuring apache to execute
> the cgi scripts. But I want to execute it using mod_python as it is
> faster compared to cgi mode. Someone please help me on this issue.

1) In the mod_python tutorial it says:

-------
2.4 Testing

...
...

2. Add the following Apache directives, which can appear in either the
main server configuration file, or .htaccess. If you are going to be
using the .htaccess file, you will not need the <Directory> tag below
(the directory then becomes the one in which the .htaccess file is
located), ***and you will need to make sure the AllowOverride
directive applicable to this directory has at least FileInfo
specified. (The default is None, which will not work.)****

<Directory /some/directory/htdocs/test>
        AddHandler mod_python .py
        PythonHandler mptest
        PythonDebug On
</Directory>
--------

Note the last sentence in the directions above.  I explain what is
needed for that part at the link in (2) below.  Also note the
directory listed in the opening <Directory> tag:

/some/directory/htdocs/test

That specifies a sub directory of htdocs.  That's because the htdocs
directory has its own <Directory> tag in httpd.conf, which specifies
the things you can to with it.  If you look around in httpd.conf, you
will see the <Directory> tag that applies to htdocs.  Mine looks like
this:

<Directory "/Library/Apache2/htdocs">
...
...
<Directory>

The mod_python Testing tutorial wants you to create your own sub
directory in htdocs, so that you can specify your own rules for that
directory.  You're probably getting errors because you have two
<Directory> tags in your httpd.conf file for the htdocs directory, and
the second tag is overwriting the first one.


2) You can see the latter part of this thread for what I did to get
mptest.py to work:

http://groups.google.com/group/comp.lang.python/browse_thread/thread/3ccaf303b8b4fd31/ea2645ec03370fb2?lnk=gst&q=mod_python&rnum=1#ea2645ec03370fb2


3) I put any <Directory> tags I added to httpd.conf below the first
<Directory> tag in http.conf, which is this one:

<Directory "/Library/Apache2/htdocs">

so that the ones lower down in the file will override the previous
tags if there is a conflict.



From http  Sun Aug 12 21:48:13 2007
From: http (Paul Rubin)
Date: 12 Aug 2007 18:48:13 -0700
Subject: LRU cache?
References: <7x8x8ixomj.fsf_-_@ruckus.brouhaha.com>
	<NikitaTheSpider-095707.12212412082007@news-server.nc.rr.com>
Message-ID: <7xmyww2oiq.fsf@ruckus.brouhaha.com>

Nikita the Spider <NikitaTheSpider at gmail.com> writes:
> This one works for me:
> http://www.webfast.com/~skip/python/Cache.py

Thanks, this one keeps track of the actual clock time rather than just
the relative age of cache entries, and has kind of a weird ageing
mechanism, building and sorting an O(n) sized list when the cache gets
95% full, giving amortized O(log n) operations per update.  But the
license is ok and I guess the functionality I need is there.  So I may
use it and/or code something.


From aleax at mac.com  Mon Aug 20 11:43:51 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 20 Aug 2007 08:43:51 -0700
Subject: yet another indentation proposal
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
	<13ci0oesdtlh871@corp.supernews.com>
	<_49yi.9351$3x.6614@newssvr25.news.prodigy.net>
	<1187589173.410862.132580@o80g2000hse.googlegroups.com>
Message-ID: <1i34yaq.h75ypdqgnhkdN%aleax@mac.com>

Michael Tobis <mtobis at gmail.com> wrote:

> On Aug 19, 11:51 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> 
> > What's wrong with just saying the current indent level? I'd much rather
> > hear "indent 4" than "tab tab tab tab".
> 
> Alternatively, you might also consider writing a simple pre and
> postprocessor so that you could read and write python the way you
> would prefer

As I pointed out in another post to this thread, that's essentially what
Tools/scripts/pindent.py (part of the Python source distribution) does.
Just use and/or adapt that...


Alex


From bj_666 at gmx.net  Wed Aug  1 13:15:17 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 1 Aug 2007 17:15:17 GMT
Subject: Assertion in list comprehension
References: <1185982643.001546.138180@e16g2000pri.googlegroups.com>
	<mailman.1439.1185985738.22759.python-list@python.org>
	<46b0bb19$0$14060$9b622d9e@news.freenet.de>
Message-ID: <5hbtd4F3inuf2U8@mid.uni-berlin.de>

On Wed, 01 Aug 2007 16:55:53 +0000, Stargaming wrote:

>> Thirdly: This sort of testing is precisely what unit tests and/or
>> doctests are for.
> 
> Huh? What beginner is doing there seems more like input validation than 
> testing. Unit or doctests are meant for testing (and in case of doctests, 
> showing) whether a function works as expected.

If it is input validation I wouldn't expect it protected by a ``if
__debug__:``.  That looks more like debugging/testing.

Ciao,
	Marc 'BlackJack' Rintsch


From python at jayloden.com  Tue Aug  7 10:46:25 2007
From: python at jayloden.com (Jay Loden)
Date: Tue, 07 Aug 2007 10:46:25 -0400
Subject: parsing a dbIII file
In-Reply-To: <1186469710.277542.246430@w3g2000hsg.googlegroups.com>
References: <1186469710.277542.246430@w3g2000hsg.googlegroups.com>
Message-ID: <46B885C1.2000107@jayloden.com>

korovev76 at gmail.com wrote:
> Hello everybody, I'm new to python (...I work with cobol...)
> 
> I have to parse a file (that is a dbIII file) whose stucture look like
> this:
> |string|, |string|, |string that may contain commas inside|, 1, 2, 3, |
> other string|

There are a number of relatively simple options that come to mind, including
regular expressions:

##### BEGIN CODE #####

import re

#
# dbIII.txt:
# |string|, |string|, |string|, |string|, |,1,2,3,4|, |other string|
#
handle = open('dbIII.txt')
for line in handle.xreadlines():
    for match in re.finditer(r'\|\s*([^|]+)\s*\|,*', line):
        for each in match.groups():
            print each

handle.close()

##### END CODE #####


Without knowing what you need to do with the data, it's hard to suggest a better
method for parsing it. The above should work, provided that the data is always
in the format | data | with no pipe symbols in between the ones used as separators.

HTH,

-Jay


From andre.roberge at gmail.com  Thu Aug  2 10:40:45 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: Thu, 02 Aug 2007 14:40:45 -0000
Subject: Determining if file is valid image file
In-Reply-To: <f8sqb8$1t6$1@nemesis.news.tpi.pl>
References: <1186064098.587590.91210@g4g2000hsf.googlegroups.com>
	<1186064275.652416.250540@d55g2000hsg.googlegroups.com>
	<f8sqb8$1t6$1@nemesis.news.tpi.pl>
Message-ID: <1186065645.879720.27720@q75g2000hsh.googlegroups.com>

On Aug 2, 11:34 am, Jarek Zgoda <jzg... at o2.usun.pl> wrote:
> Andr? napisa?(a):
>
> >> Other than installing PIL, is there a "simple" way using Python only
> >> to determine if a file is a valid image file?
>
> >> I'd be happy if I could at least identify valid images files for gif,
> >> jpeg and png.   Pointers to existing modules or examples would be
> >> appreciated.
>
> >> The reason why I'd prefer not using PIL is that I'd like to bundle
> >> such a function/module in my app.
>
> >> Andr?
>
> > I should have added: I'm interesting in validating the file *content*
> > - not the filename :-)
>
> Is the module imghdr enough for your needs?
>

Yes, thanks.


> --
> Jarek Zgoda
> Skype: jzgoda | GTalk: zg... at jabber.aster.pl | voice: +48228430101
>
> "We read Knuth so you don't have to." (Tim Peters)




From bray at sent.com  Sun Aug  5 23:41:02 2007
From: bray at sent.com (Brian Ray)
Date: Sun, 5 Aug 2007 22:41:02 -0500
Subject: ANN: ChiPy August Meeting Topic "Snakes On Apples" 
Message-ID: <84A0B6FA-9DAE-48E9-B66C-F179D71F00ED@sent.com>

ChiPy the Chipmunk** invites you to attend August's Chicago Python  
User Group meeting. ChiPy says, "This will be the best meet ever!"

When
----

Thursday August 9th 2007 7:00PM

Cost
----

Free

Topics
------

Snakes on Apples <http://chipy.org/SnakesOnApples> Developing Python  
on the Mac. All are welcome, no Macintosh, Unix, or Python experience  
required.

  - TextMate with Python -- Kumar McMillan
     + how to edit / navigate -- all the stuff that makes it  
comparable to emacs or whatnot (I'll keep this short)
     + hack: how to write commands / Bundles to automate your coding  
needs
  - Address Book Plugin for syncing with gmail contacts utilizing  
libgmail -- Brian Ray
  - Python Sprint at Google and PyCon '08 updates / discussion
  - After: If you wish, follow Chipy the Chipmunk to Greektown or  
Taylor Street

Venue
-----

::
   The University of Illinois at Chicago
   Science and Engineering Offices (SEO 1000)
   851 South Morgan Street
   Chicago, Illinois 60607

(note: Emergency Cell 773 835 9876, if you get lost and need moral  
support)

CTA
~~~

FROM O'HARE AIRPORT BY CTA TRAIN: Take the CTA BLUE LINE TRAIN from  
O'Hare to the UIC-Halsted stop. Exit up
stairs in center of the train platform (the platform also has two  
long ramps on either side heading East and West, which also
can be used). Proceed South on street level to the UIC campus.

FROM MIDWAY AIRPORT BY CTA TRAIN: Take the CTA ORANGE LINE TRAIN from  
Midway to the Clark/Lake station. Exit
the train, GO DOWNSTAIRS and transfer to the CTA BLUE LINE. Take the  
Blue Line train towards 54/Cermak (Forest Park)
and exit at the UIC-Halsted stop. Exit up stairs in center of the  
train platform (the platform also has two long ramps on either
side heading East and West, which also can be used). Proceed South on  
street level to the UIC campus.


Driving
~~~~~~~

PARKING: Public parking is available via a four-level parking garage  
on the NE corner of Taylor & Halsted streets, and at
the open parking lot on the SE corner of Taylor and Morgan streets.  
IF PARKING IN THE GARAGE, ENTER ON THE
LEFT DRIVEWAY as you turn Nor th into the building, ensuring that you  
take a ticket. If parking in the open lot, enter
through the Southern most driveway, the one that has the attendant  
booth.

DRIVING FROM THE NORTH: Take 90/94 South (Kennedy Expressway) to the  
Taylor Street/Roosevelt Ave, Exit 52A.
Keep to the right and turn right immediately onto Taylor Street. The  
entrance to the parking garage will be immediately to
your right.

FROM THE SOUTH: Take 90/94 Nor th (Dan Ryan Expressway). Pass to the  
far right lane and take the Roosevelt Ave exit,
Exit 52B. Stay in the middle or far right lane and go straight  
through the first intersection, paralleling the expressway. Turn
left onto Taylor Street. The entrance to the parking garage will be  
to your right.

FROM THE WEST: Take 290 East (Eisenhower Expressway) to 90/94 South  
(Dan Ryan Expressway). Immediately exit to
the right onto Taylor Street/Roosevelt Ave, Exit 52A. Stay to the  
right and turn right at the light onto Taylor Street. The
entrance to the parking garage will be immediately to your right.
FROM THE EAST: In the Loop area, take Harrison Street. Proceed west  
and turn left onto Halsted Street. Continue South
on Halsted, turn left onto Taylor and left again into the parking  
garage.


Food Donations
--------------

Roy Talman & Associate


About ChiPy
-----------

ChiPy is a group of Chicago Python Programmers, l33t, and n00bs.
Meetings are held monthly at various locations around Chicago.
Also, ChiPy is a proud sponsor of many Open Source and Educational
efforts in Chicago. Stay tuned to the mailing list for more info.

ChiPy website: <http://chipy.org>
ChiPy Mailing List: <http://mail.python.org/mailman/listinfo/chicago>
Python website: <http://python.org>

** "ChiPy the Chipmunk" is a fictitious character. Any similarity to  
actual chipmunks, living or dead, is purely coincidental.

------


From bdesth.quelquechose at free.quelquepart.fr  Wed Aug  1 16:23:02 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 01 Aug 2007 22:23:02 +0200
Subject: Pythonic way for missing dict keys
In-Reply-To: <87lkd0eprj.fsf@pobox.com>
References: <mailman.938.1184958565.22759.python-list@python.org>
	<pan.2007.07.21.00.20.54.768439@REMOVE.THIS.cybersource.com.au>
	<mailman.954.1184989959.22759.python-list@python.org>
	<Xns99748CC2DB4AAduncanbooth@127.0.0.1>
	<1185041243.323915.161230@x40g2000prg.googlegroups.com>
	<mailman.984.1185101740.22759.python-list@python.org>
	<87lkd0eprj.fsf@pobox.com>
Message-ID: <46b0ebdf$0$18878$426a74cc@news.free.fr>

John J. Lee a ?crit :
> Alex Popescu <nospam.themindstorm at gmail.com> writes:
> 
> 
>>Zentrader <zentraders at gmail.com> wrote in news:1185041243.323915.161230
>>@x40g2000prg.googlegroups.com:
>>
>>
>>>On Jul 21, 7:48 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>>>
>>>[snip...]
>>>
>>>
>>>>From the 2.6 PEP #361 (looks like dict.has_key is deprecated)
>>>Python 3.0 compatability: ['compatibility'-->someone should use a
>>>spell-checker for 'official' releases]
>>>        - warnings were added for the following builtins which no
>>>longer exist in 3.0:
>>>             apply, callable, coerce, dict.has_key, execfile, reduce,
>>>reload
>>>
>>
>>I see... what that document doesn't describe is the alternatives to be 
>>used. And I see in that list a couple of functions that are probably used a 
>>lot nowadays (callable, reduce, etc.).
> 
> 
> callable and reduce are rarely used, at least in code I've seen.

I do use callable(). Not everyday, for sure, but still often enough to 
have to reimplement it when I'll switch to Py3K.

And while I rarely use it, I'll regret reduce().

>  I
> would agree there will be a large number of programs that contain one
> or two calls to these functions, though.  Certainly has_key will be
> the most common of those listed above (but trivial to fix).  apply
> will be common in old code from the time of Python 1.5.2.

I still use it (in a somewhat deviant way) to define properties:

class MyClass(object):
   def __init__(self, val):
     self.val = val
   @apply
   def val():
     def fget(self):
       return self._val
     def fset(self, val):
       self._val = val


>  execfile is
> perhaps more common that callable (?) 

Never used it, never saw it used.

> but again is really a "maybe 1
> call in a big program" sort of thing.  Anybody using coerce or reload
> deserves to lose ;-)
> 
> 
> John


From tooru_honda at fast-mail.org  Sat Aug 25 08:35:52 2007
From: tooru_honda at fast-mail.org (tooru honda)
Date: Sat, 25 Aug 2007 20:35:52 +0800
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
Message-ID: <tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>

At the end, I think it is worthwhile to implement my own shuffle and 
random methods based on os.urandom.  Not only does the resulting code 
gets rid of the minuscule bias, but the program also runs much faster.

When using random.SystemRandom.shuffle, posix.open and posix.close from 
calling os.urandom account for almost half of the total execution time 
for my program.  By implementing my own random and getting a much larger 
chunk of random bytes from os.urandom each time, I am able to reduce the 
total execution time by half.

-tooru honda

P.S. I use python 2.5.1 on MacOSX 10.4.10 (PowerPC).


From evan at yelp.com  Tue Aug 21 21:11:17 2007
From: evan at yelp.com (Evan Klitzke)
Date: Tue, 21 Aug 2007 18:11:17 -0700
Subject: Extracting the traceback
In-Reply-To: <1187744252.157335.91630@x40g2000prg.googlegroups.com>
References: <1187740411.848743.151960@x35g2000prf.googlegroups.com>
	<mailman.90.1187741360.32294.python-list@python.org>
	<1187744252.157335.91630@x40g2000prg.googlegroups.com>
Message-ID: <cfb58d850708211811s5831a585u9bd7ce64771dad6f@mail.gmail.com>

On 8/21/07, codesite-noreply <billiejoex at gmail.com> wrote:
> On 22 Ago, 02:09, "Evan Klitzke" <e... at yelp.com> wrote:
> > On 8/21/07, billiejoex <gne... at gmail.com> wrote:
> >
> >
> >
> > > Hi there,
> > > I'm facing a case where I need to get the traceback outptut when
> > > occurring an exception.
> > > I solved such problem by using traceback module in conjunction with
> > > StringIO:
> >
> > > import StringIO, traceback
> > > try:
> > >     raise Exception
> > > except:
> > >     f = StringIO.StringIO()
> > >     traceback.print_exc(file=f)
> > >     print f.getvalue()
> >
> > > ... but this seems a little poor to me since I first put output into
> > > the StringIO.StringIO(), then I get it back by using getvalue() on
> > > it.
> > > Is there a way to avoid the use of StringIO and get such output
> > > without using such (useless) additional step?
> >
> > If you just want to print the output (as in your example), you can use
> > file=sys.stdout or file=sys.stderr in the call to print_exc. If you
> > want to store the traceback into a string for some other purpose (e.g.
> > logging, email notifications) I believe that you must use a StringIO
> > object.
> >
> > --
> > Evan Klitzke <e... at yelp.com>
>
> Unfortunately I have to pass the output to a function which prints the
> passed string both on screen and into a log file.
> Anyway, not too much important. I'll use StringIO if there's no other
> solution.

Turns out I was wrong -- you can just get the string, using format_exc
rather than print_exc.

-- 
Evan Klitzke <evan at yelp.com>


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Aug 12 08:06:39 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 12 Aug 2007 14:06:39 +0200
Subject: wxPython - drawing without paint event
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
	<1186738813.373909.96230@x35g2000prf.googlegroups.com>
	<1186796567.331348.42450@q3g2000prf.googlegroups.com>
	<5i5l0dF2lortaU1@mid.individual.net>
	<1186883988.585048.16590@m37g2000prh.googlegroups.com>
Message-ID: <5i8befF3o5no1U1@mid.individual.net>

 glenn.chappell at gmail.com wrote:

> Okay, but how do I tell wx that it needs to send me a paint event?

It will send it on its own. You just need to bind your OnPaint (or
similar) method to it like 7stud demonstrates.

I really recommend reading "wxPython in Action", or at least the
tutorial.

Regards,


Bj?rn

-- 
BOFH excuse #273:

The cord jumped over and hit the power switch.



From bj_666 at gmx.net  Fri Aug 10 01:43:55 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 Aug 2007 05:43:55 GMT
Subject: Does PyModule_GetDict return information about class method
	variables?
References: <1186713277.019869.265820@d30g2000prg.googlegroups.com>
Message-ID: <5i2c8rF3kqc46U1@mid.uni-berlin.de>

On Thu, 09 Aug 2007 19:34:37 -0700, MD wrote:

>    I have a variable which is defined inside a class method. When I
> call PyModule_GetDict on the module containing this class, the
> dictionary doesn't contain any information about this variable. Is
> this expected behavior? If so, what options do I have to access this
> variable from my Python C extension.

You can't access names in methods because they don't exist until you call
the method.  It's just like local variables in C.  Consider:

void foo(void)
{
    int bar = 42;
}

Here `bar` does not exist until you call `foo()` and it disappears as soon
as the function returns.

It's the very same situation in Python:

class A(object):
    def foo(self):
        bar = 42

The local name `bar` only exists if `foo()` is called on an instance of `A`.

Ciao,
	Marc 'BlackJack' Rintsch


From jstroud at mbi.ucla.edu  Thu Aug 30 15:42:19 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 30 Aug 2007 12:42:19 -0700
Subject: subclassing Python types
In-Reply-To: <1188501446.781039.241630@e9g2000prf.googlegroups.com>
References: <1188500442.434722.157350@q5g2000prf.googlegroups.com>
	<1188501226.443493.94720@i13g2000prf.googlegroups.com>
	<1188501446.781039.241630@e9g2000prf.googlegroups.com>
Message-ID: <fb76ir$nf2$1@zinnia.noc.ucla.edu>

zzbbaadd at aol.com wrote:
> I don't know what name I would use to call a method:
> 
> 
> class MyString(str):
>     def __init__(strInput):
>        ????? = strInput

You need to read up on subclassing builtin types and/or describe what 
you want to achieve. str is an immutable type, and so you must return an 
instance from __new__. Read this:

   http://www.python.org/download/releases/2.2.3/descrintro/

And here is an example that might get you started (assuming you really 
want to do this):

class StupidDefaultString(str):
   default = "I'm a Default!"
   success = "42"
   error = "Not a default, don't bother."
   def __new__(cls, arg=None):
     if arg is None:
       arg = cls.default
     return str.__new__(cls, arg)
   def __str__(self):
     if self == self.default:
       return self.success
     else:
       return self.error

py> s = StupidDefaultString('Bob')
py> s
'Bob'
py> print s
Not a default, don't bother.
py> s = StupidDefaultString()
py> s
"I'm a Default!"
py> print s
42


James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From mhearne808 at gmail.com  Thu Aug  9 02:16:30 2007
From: mhearne808 at gmail.com (mhearne808[insert-at-sign-here]gmail[insert-dot-here]com)
Date: Wed, 08 Aug 2007 23:16:30 -0700
Subject: accessing parts of large files with File.seek()
In-Reply-To: <1186623452.207655.224400@22g2000hsm.googlegroups.com>
References: <1186591585.175399.139850@x40g2000prg.googlegroups.com>
	<1186623452.207655.224400@22g2000hsm.googlegroups.com>
Message-ID: <1186640190.277044.171870@x35g2000prf.googlegroups.com>

On Aug 8, 7:37 pm, "programmer... at gmail.com" <programmer... at gmail.com>
wrote:
> On Aug 8, 11:46 am, "mhearne808[insert-at-sign-here]gmail[insert-dot-
>
>
>
> here]com" <mhearne... at gmail.com> wrote:
> > I'm having a problem with the File object's seek() method.
> > Specifically, I cannot use it to seek to a location in a binary file
> > that is greater than 2^31 (2147483648).  This seems unnecessarily
> > limiting, as it is common these days to have files larger than 2 GB.
>
> > Is there some LargeFile object out there that I can use to read my
> > file, which is approximately 3.3 GB in size?
>
> > Python version (freshly built from source this morning):
> > Python 2.5.1 (r251:54863, Aug  8 2007, 09:23:05)
> > [GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin
>
> > Thanks,
>
> > Mike
>
> I use large files quite a bit, but in Windows & Linux.  Here's a quick
> excerpt of a local ubuntu-linux session...
>
> jaime at elizabeth:/var/virtualbox/VDI$ ls -l
> total 1682536
> -rw-rwx--- 1 jaime vboxusers      40960 2007-07-20 21:41 windows
> xp.vdi
> -rw-rwx--- 1 jaime vboxusers 3591387136 2007-07-20 21:53 winxp.vdi
> jaime at elizabeth:/var/virtualbox/VDI$ ipython
> Python 2.5.1 (r251:54863, May  2 2007, 16:27:44)
> Type "copyright", "credits" or "license" for more information.
>
> IPython 0.7.3 -- An enhanced Interactive Python.
> ?       -> Introduction to IPython's features.
> %magic  -> Information about IPython's 'magic' % functions.
> help    -> Python's own help system.
> object? -> Details about 'object'. ?object also works, ?? prints more.
>
> In [1]: f = file('winxp.vdi')
>
> In [2]: f.seek(3591387132)
>
> In [3]: f.read()
> Out[3]: '\x00\x00\x00\x00'
>
> In [4]:
>
> What exception are you receiving?  (Not that I can offer any advice,
> as I don't have a Mac to use for testing.)...
>
> jw

I think I've figured out what the problem must be (not at Mac anymore,
so will have to test tomorrow).  According to this link:
http://docs.python.org/lib/posix-large-files.html

I probably need to compile in large file support on my Mac.  I get it
for free on my Ubuntu linux box...

FYI, it was an OverFlow Error.



From willmaier at ml1.net  Tue Aug 14 12:34:30 2007
From: willmaier at ml1.net (Will Maier)
Date: Tue, 14 Aug 2007 11:34:30 -0500
Subject: Simple python iteration question
In-Reply-To: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
References: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
Message-ID: <20070814163430.GJ22017@lass.lfod.us>

On Tue, Aug 14, 2007 at 12:22:04PM -0400, Bryan wrote:
> I just started with python, and have a for loop question
> 
> In c++ (or a number of other languages) I can do this:
> 
> for (int i=0, j=0; i < i_len, j< j_len; ++i, ++j) {}
> 
> If I have this in python:
> l = ['a', 'b', 'c']
> 
> I want to get the value and also an iterator:
> for i,v in len(l), l:
> 	print v
> 	print i
> 
> Or something like this without declaring the iterator outside my loop...
> 
> How do I do this?

Use the enumerate() builtin.

    >>> l = ['a', 'b', 'c']
    >>> for i, v in enumerate(l):
    ...     print i, v
    ... 
    0 a
    1 b
    2 c

-- 

[Will Maier]-----------------[willmaier at ml1.net|http://www.lfod.us/]


From shahargs at gmail.com  Tue Aug  7 03:44:49 2007
From: shahargs at gmail.com (shahargs at gmail.com)
Date: Tue, 07 Aug 2007 00:44:49 -0700
Subject: Regular Expression Groups - loop
Message-ID: <1186472689.488634.23360@b79g2000hse.googlegroups.com>

Hi,
I'm trying to write application which parse one page to sentences and
then, check every group for few things.

The code:
		rawstr = r"""([^.?!]+[.?!])"""
		regex=re.compile(rawstr)
		matchs=regex.search(document)
document, is the text i parsing. I cheked it in Kodos, and everything
worked well. but, i'm trying to write for loop which check every
group.

I tried:
		for group in matchs.groups():
but then, it's check only the first group. and i tried:
		for group in matchs.group():
but then it's checking every letter, not every sentence.

is anyone know how i should write this loop to check every group on
the groups collection that the regular expression return?

Shahar.



From grante at visi.com  Tue Aug 28 09:03:53 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 28 Aug 2007 13:03:53 -0000
Subject: Embedding the python interpreter
References: <1188305107.028128.136960@d55g2000hsg.googlegroups.com>
Message-ID: <13d879psf7e080@corp.supernews.com>

On 2007-08-28, Tom Gur <gur.tom at gmail.com> wrote:
> Hey,
>
> Do you know an easy way to embed the python interpreter in a python
> program (so a non-technical user, which has no idea how to install the
> python interpreter would be able to run the script as an executable) ?

Hey,

This question is asked at least once a week.  I'm surprised you
didn't see the threads.  [It probably should be int he FAQ, but
isn't.]

http://www.py2exe.org/
http://sourceforge.net/projects/cx-freeze/
http://pyinstaller.hpcf.upr.edu/cgi-bin/trac.cgi
http://cheeseshop.python.org/pypi/py2app/

-- 
Grant Edwards                   grante             Yow! Could I have a drug
                                  at               overdose?
                               visi.com            


From tenax.raccoon at gmail.com  Tue Aug 14 11:00:53 2007
From: tenax.raccoon at gmail.com (Jason)
Date: Tue, 14 Aug 2007 08:00:53 -0700
Subject: Icons for GUI development
In-Reply-To: <1187058129.306171.174590@g12g2000prg.googlegroups.com>
References: <1187058129.306171.174590@g12g2000prg.googlegroups.com>
Message-ID: <1187103653.530272.182100@w3g2000hsg.googlegroups.com>

On Aug 13, 8:22 pm, Benjamin <musiccomposit... at gmail.com> wrote:
> I'm developing a mail client. Since GUI are usually improved with some
> icons, I'm looking for some. Because I'm not a very gifted artist I'm
> searching for a library of GPL or public domain icons. Any suggestions?

Try out the Silk icon set, too.
http://www.famfamfam.com/lab/icons/silk/

  --Jason



From brunovianarezende at gmail.com  Fri Aug 17 10:02:27 2007
From: brunovianarezende at gmail.com (brunovianarezende at gmail.com)
Date: Fri, 17 Aug 2007 14:02:27 -0000
Subject: how to pass a custom object to re.search?
Message-ID: <1187359347.755104.118660@r29g2000hsg.googlegroups.com>

Hi,

sorry if this is a faq. I've searched and got no result. I'm willing
to pass a custom object to re.search method, but I'm getting the
error:

TypeError: expected string or buffer

I don't want to make my object to inherit from basestring (nor I know
how to do it...). Then I was left with 'buffer'. I tried to make my
object inherit from types.BufferType and got the error:

TypeError: Error when calling the metaclass bases
    type 'buffer' is not an acceptable base type

If I call the function buffer passing an instance of my object I get:

TypeError: buffer object expected

Is it possible to make what I want (to pass a custom object to
re.search)?

regards,
Bruno



From kyosohma at gmail.com  Mon Aug  6 10:50:46 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 06 Aug 2007 07:50:46 -0700
Subject: Tkinter or wxpython?
In-Reply-To: <7xps204tin.fsf@ruckus.brouhaha.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
Message-ID: <1186411846.690086.120280@z24g2000prh.googlegroups.com>

On Aug 6, 9:39 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> kyoso... at gmail.com writes:
> >  I've read that Tkinter doesn't scale well if you're writing complex
> > GUIs. I haven't been able to test this hypothesis though. However,
> > since I had to rewrite VBA apps into Python, to get the right "look
> > and feel" I needed the widgets that wxPython provided. Since I started
> > out with C++, I find wxPython better than Tkinter, but it's all pretty
> > subjective. Try them both!
>
> Tkinteger (dang, I always end up typing it that way, I won't even
> bother fixing the error) is easy to use for simple gui's, and it's
> part of the standard python distro which for me is a big advantage (no
> extra crap to download).  However, the widget set is rather ugly and
> doesn't blend in well with anyone's native widgets; the widget
> selection itself is rather narrow, and I think kyosohma may be right
> that it doesn't scale well to complex gui's.  I've looked at the code
> for IDLE's gui and it's terrifying.
>
> At this point I think nobody should write desktop gui apps without a
> good reason.  There is a fairly flexible and easy to program gui
> already running on almost every desktop, namely the web browser.
> Before you write a gui using some client side toolkit, ask yourself
> whether you can instead embed a web server in your application and
> write an HTML gui.  That approach is not always the answer, but it has
> considerable advantages when you can do it that way.

I agree that making web apps is probably the way of the future.
However, there are lots of security risks involved with it that need
to be understood. One of the problems that raging is about AJAX, see
here: http://arstechnica.com/news.ars/post/20070802-security-experts-warn-developers-about-the-risks-of-premature-ajax-ulation.html

Desktop apps have security issues too, of course.

Mike



From dfabrizio51 at gmail.com  Mon Aug 20 16:37:26 2007
From: dfabrizio51 at gmail.com (chewie54)
Date: Mon, 20 Aug 2007 20:37:26 -0000
Subject: best GUI library for vector drawing program
In-Reply-To: <1187593485.206021.291390@w3g2000hsg.googlegroups.com>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
	<1187359935.718745.206790@i38g2000prf.googlegroups.com>
	<1187361760.396397.251030@e9g2000prf.googlegroups.com>
	<1187593485.206021.291390@w3g2000hsg.googlegroups.com>
Message-ID: <1187642246.056340.57710@l22g2000prc.googlegroups.com>

On Aug 20, 3:04 am, Mats <mats... at gmail.com> wrote:
> If you want to stay within Tcl/Tk you could take a look at my tkpath
> package:http://tclbitprint.sf.net/
> and shots:http://tclbitprint.sourceforge.net/tkpath/quartz/index.htmlhttp://tclbitprint.sourceforge.net/tkpath/gdiplus/index.htmlhttp://tclbitprint.sourceforge.net/tkpath/cairo/index.html
>
> Mats

Very nice. Are all the features functional?   I was reading that Cairo
is cross-platform so can I use your tkpath package with Cairo for all
the platforms?

Have you implemented the save as pdf,  ps, and svg vector file
formats?

Thanks for your feedback.
Dan



From bdesth.quelquechose at free.quelquepart.fr  Mon Aug 20 15:04:54 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 20 Aug 2007 21:04:54 +0200
Subject: introspection and functions
In-Reply-To: <1187819949.515982.15450@r23g2000prd.googlegroups.com>
References: <1187819949.515982.15450@r23g2000prd.googlegroups.com>
Message-ID: <46ccbaaf$0$429$426a74cc@news.free.fr>

yagyala a ?crit :
> Hi. I would like to be able to tell, at run time, how many parameters
> a function requires. Ideally I would like to be able to tell which are
> optional as well. I've tried looking at the functions attributes, but
> haven't found one that helps in this. How can I do this?

 >>> def myfunc(arg1, arg2, arg3='toto', *args, **kw): pass
...
 >>> import inspect
 >>> inspect.getargspec(myfunc)
(['arg1', 'arg2', 'arg3'], 'args', 'kw', ('toto',))


HTH


From thomas at jollans.com  Mon Aug 13 15:10:37 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Mon, 13 Aug 2007 21:10:37 +0200
Subject: Dictionary viewer and editor
In-Reply-To: <46C09E65.6060607@indiana.edu>
References: <46C09E65.6060607@indiana.edu>
Message-ID: <200708132110.39340.thomas@jollans.com>

On Monday 13 August 2007, Ariel Balter wrote:
> http://mail.python.org/pipermail/python-list/2001-August/100288.html
>
> Did you ever finish writing this?


YAML (without flow style) could qualify as "tree format". example:

yaml.dump ( {"alpha": 1, "beta": 2, "otherstuff": {"bug": None, "cool": 
True, "foo": ["bar", 2e64, {13: 'many eyes', 14: 'make all', 15: 'bugs 
shallow'}]}}, default_flow_style=False )

... is ...

alpha: 1
beta: 2
otherstuff:
  bug: null
  cool: true
  foo:
  - bar
  - !!float '2e+64'
  - 13: many eyes
    14: make all
    15: bugs shallow



From greg at cosc.canterbury.ac.nz  Fri Aug 10 04:19:40 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Fri, 10 Aug 2007 20:19:40 +1200
Subject: Issues of state
In-Reply-To: <mailman.1800.1186676234.22759.python-list@python.org>
References: <op.tv98rva4wepdt4@ericb.pragmadev>	<7x8x8mpn37.fsf@ruckus.brouhaha.com>	<hblpo4-mgj.ln1@lairds.us>	<7xfy2t8l5n.fsf@ruckus.brouhaha.com>	<5uhro4-st8.ln1@lairds.us>	<f9f9mr$cch$1@sea.gmane.org>
	<mailman.1800.1186676234.22759.python-list@python.org>
Message-ID: <5i2lk3F3m8h60U1@mid.individual.net>

Jay Loden wrote:
> Like most things involving dynamic client side-javascript code and AJAX
> technology, it's a lot harder than you'd like it to be to solve the problem, but
> in cases where the Back button is really an issue, it's worth the effort.

So if you're willing to put in a huge amount of time,
effort and ingenuity, it's possible to overcome a
problem that only existed in the first place because
you chose an inappropriate technique for implementing
a user interface...

--
Greg


From robert.kern at gmail.com  Mon Aug 20 15:35:27 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 20 Aug 2007 14:35:27 -0500
Subject: CIE Colorspace Conversions
In-Reply-To: <46C9E454.1070303@clemson.edu>
References: <46C9E454.1070303@clemson.edu>
Message-ID: <facqe0$90l$1@sea.gmane.org>

Greg Taylor wrote:
> Greetings,
> 
> I'm not sure if this is the right place to probe for interest, but I 
> figured I'd give it a shot.
> 
> Recently, a project I undertook at work required us to convert between 
> the various CIE color spaces (XYZ, Lab, LCH, Luv, etc.). I looked long 
> and hard but didn't find any Python library that did this, I was able to 
> find JavaScript and C-based implementations, but that's about it. For a 
> good example of the kinds of conversions I am referring to, see: 
> http://brucelindbloom.com/ColorCalculator.html
> 
> This is likely only to interest those in the Graphic Communications 
> industry (notably printers and anyone else having to deal with color 
> science), but I'm curious to see if anyone out there in the Python 
> community would have any use for a color conversion library. If I've 
> missed an existing implementation, feel free to point it my way as well.

I have some here (apologies for the long URL):

http://www.enthought.com/~rkern/cgi-bin/hgwebdir.cgi/colormap_explorer/file/095eaf64fd9f/colormap_explorer/conversion.py

I haven't attached a license text to it, yet, but I'm making it available under
a BSD license. Ping me if you need the real text attached to it. It requires
numpy and was adapted from an earlier version in scipy (which has a few more
colorspaces I wasn't interested in).

http://svn.scipy.org/svn/scipy/trunk/Lib/sandbox/image/color.py

I've also wrapped the LCMS library for that application if that interests you.
It doesn't do much more than what I needed, though. I wrapped it myself instead
of using the standard SWIG bindings for it so I could pass in numpy arrays.

http://www.enthought.com/~rkern/cgi-bin/hgwebdir.cgi/lcms

Let me know if there is anything I can do to make this code more useful to you.

-- 
Robert Kern

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



From ldo at geek-central.gen.new_zealand  Mon Aug 27 08:02:46 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Tue, 28 Aug 2007 00:02:46 +1200
Subject: Problem from complex string messing up
References: <1187914624.414449.125480@x40g2000prg.googlegroups.com>
Message-ID: <faueci$894$1@lust.ihug.co.nz>

In message <1187914624.414449.125480 at x40g2000prg.googlegroups.com>, 
sebzzz at gmail.com wrote:

> Well, anyway, a
> javascript error pops-up somewhere in that code after I run my script
> on the files.

What is the error? In Firefox, under the "Tools" menu, select "Error
Console". Click the "Clear" icon to get rid of whatever junk may already
have accumulated, then go to view your page and see what new errors appear.

While you're at it, you may want to reformat that JavaScript code for
clarity.


From bj_666 at gmx.net  Wed Aug 15 09:22:56 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 15 Aug 2007 13:22:56 GMT
Subject: What order does info get returned in by os.listdir()
References: <gemini.jms7ay00fafcf00k8@jernic.by.invalid>
	<gemini.jmtc5f0021tj002a4@omba.demon.invalid>
Message-ID: <5igd1gF3mc1akU1@mid.uni-berlin.de>

On Wed, 15 Aug 2007 12:34:27 +0100, Jeremy C B Nicoll wrote:

> I've some supplementary questions... my original code was looking at each
> leafname in turn via
> 
>   for leaf in os.listdir(path):
>       wholefile = os.path.join(path,leaf)
>       if os.path.isfile(wholefile):
>          if leaf.startswith("~"):
> 
> etc.  But I now realise I might alternatively do something like:
> 
>   leaflist = os.listdir(path)
>   <then something to sort that list>
>   for leaf in leaflist:

But this is doing something different that the above code!?

> How would I sort leaflist in a way that mimics the sort order that XP shows
> me things under?  

This depends on what XP is.  Which program?  Which locale?  How does the
locale influence that programs sorting?

> Secondly, my code is wasting time looking at subdirectories/files which I
> already know I'm not interested in.  Is there a way to restrict listdir to,
> say, only return info about subdirectories, or only about dirs/files whose
> names match a pattern?

`os.listdir()` always returns all names.  You can or have to  filter the
result if you are only interested in some of the names.  Simple pattern
matching on names can be done with `glob.glob()`.

> Thirdly, once I've go a list of leafnames, somehow, is there a way to
> ask Python if a specific leaf-value is in that list, without explicitly
> looping through the items in the list?

With the ``in`` operator you have an implicit loop over the list.

  if 'readme.txt' in leafnames:
      print 'Hurray!'

Ciao,
	Marc 'BlackJack' Rintsch


From carsten at uniqsys.com  Mon Aug  6 15:27:50 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 06 Aug 2007 15:27:50 -0400
Subject: udp, datagram sockets
In-Reply-To: <1186416225.769753.307110@o61g2000hsh.googlegroups.com>
References: <1186416225.769753.307110@o61g2000hsh.googlegroups.com>
Message-ID: <1186428470.3376.8.camel@dot.uniqsys.com>

On Mon, 2007-08-06 at 09:03 -0700, 7stud wrote:
> server:
> ------------------
> import socket
> import sys
> 
> s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
> s.bind(("", 7777))
> [...]
>         #Send messages back to client:
>         total_sent = 0
>         while total_sent < len(message):
>             print "debug: send while loop"
> 
>             size_sent = s.sendto(message[total_sent:], ("localhost",
> 7777) )
>             total_sent += size_sent
> 
>             print "debug:", total_sent, len(message)

I don't think that sending the datagram to port 7777 on localhost sends
the message back to the client. I'm guessing the server is sending the
message back to itself, which throws it into the infinite feedback loop
you're experiencing.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From __peter__ at web.de  Tue Aug 21 17:40:52 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 21 Aug 2007 23:40:52 +0200
Subject: Logging module gives duplicate log entries
References: <1187702248.203917.188570@k79g2000hse.googlegroups.com>
	<mailman.61.1187702909.32294.python-list@python.org>
	<1187731317.661324.244870@k79g2000hse.googlegroups.com>
Message-ID: <fafm57$abl$00$1@news.t-online.com>

Shiao wrote:

>> You need to remove the handler from the logging object
>>
>> # remove the handler once you are done
>> applog.removeHandler(hdl)

> I'm not sure how this could help.

If you have multiple handlers you'll get a logged message for every handler.

In your code logging.basicConfig() implicitly adds a handler and you add
another one calling addHandler(). Let's use a StreamHandler to see the
effect immediately:

>>> import logging
>>> logging.basicConfig()
>>> root = logging.getLogger()
>>> root.warn("once")
WARNING:root:once
>>> handler = logging.StreamHandler()
>>> root.addHandler(handler)
>>> root.warn("twice")
WARNING:root:twice
twice
>>> root.removeHandler(handler)
>>> root.warn("once again")
WARNING:root:once again

Of course it would be preferable not to add a second handler in the first
place, either by omitting the basicConfig() or the explicit addHandler()
call.

Peter


From n.marinov at sistechnology.com  Wed Aug  8 10:32:09 2007
From: n.marinov at sistechnology.com (nikolay marinov)
Date: Wed, 08 Aug 2007 17:32:09 +0300
Subject: testing
Message-ID: <46B9D3E9.60709@sistechnology.com>

Hi,there.I'm a young tester (4 months,still learning what is "testing
>  software!?!"). I work on Linux and i write my tests with Python.
>     Our assignment is to build a module from our 'BIG' program that
>  have to be able to edit xls files, without using MSExcel, OpenOffice
>  or something like that, just using python.I work with two colleagues
>  which are more experienced than me in programming and in the
>  assignment we got they are exploring python modules that can edit and
>  produce xls files.Off course i am testing and have to compare two
>  "xls" files , one made by MSExcel and other made by  a module that can
>  edit and produce an xls file.Actually i'm not sure that this is way is
>  the  write one, but it's the only one i can think of.
> 
>  The reason of writing this is that this week all the people that are 
>  supposed to teaching me are on ? holiday, so there's nobody else who 
>  can help me here.
>  My English is not very good but i hope you can understand the meaning
>  of all this and i'll be glad if you can help me with this
>  assignment.Don't worry, there are no money for me to gain from this
>  assignment.It's purpose is just teaching me test software.
> 
>  Thanks in advance!



From ed at leafe.com  Sun Aug 12 21:14:08 2007
From: ed at leafe.com (Ed Leafe)
Date: Sun, 12 Aug 2007 21:14:08 -0400
Subject: Ligmail bug?
In-Reply-To: <46BEE9B8.8080904@holdenweb.com>
References: <20070812005057.GA15805@ob41.org> <f9l3m2$hb0$1@sea.gmane.org>
	<20070812182439.GA2427@ob41.org> <46BEE9B8.8080904@holdenweb.com>
Message-ID: <E9171170-9581-42C5-B68F-6F1442433246@leafe.com>

On Aug 12, 2007, at 7:06 AM, Steve Holden wrote:

> [Please reply via the list when a response is made via the list.  
> You may
> now have detached the follow-ups from your original question, but at
> least if you use the list there's a chance someone else will help  
> you if
> I give up or don't have time. Note I have sent this response to the
> list; you are Cc'd to make sure you pick it up even though it may not
> appear in the same thread.]

	I've seen others comment on this, so I'll throw in my 2 cents.

	The default behavior for this list should be to reply to the list,  
as you have pointed out. Yet for some unfathomable reason, the  
keepers of the list have set it up to default to reply to the  
original sender. This is nothing short of stupid, and I cast my vote  
(if I even have one) for changing this default to a more intelligent  
one, if for no other reason than to not have to constantly read  
comments like this chiding someone for acting in a predictable fashion.

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com




From __peter__ at web.de  Thu Aug 16 01:43:39 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 16 Aug 2007 07:43:39 +0200
Subject: Retry: Question about FutureWarning
References: <mailman.1994.1187142273.22759.python-list@python.org>
	<ubKdnTirKeU6xl_bnZ2dnUVZ_rzinZ2d@speakeasy.net>
	<1187183459.675090.194800@w3g2000hsg.googlegroups.com>
	<mailman.2014.1187188612.22759.python-list@python.org>
Message-ID: <fa0o6b$ses$00$1@news.t-online.com>

Steven W. Orr wrote:

> I'm trying again, since no response indicates that I'm not providing 
> enough info.

No, you were providing too much irrelevant information. It would have been
better to put it that way:

> Thanks guys, but that's not my question. The question is this: Why does
> the call to filterwarnings not work if it's placed inside the M1 module?
> Why do I have to place the call in M4 to make it work? This is more a
> question about how import works than it is about what the value of -1 is.
> ;-)

You cannot switch off the warning inside the module because it is issued
during its compilation, not its execution:

$ cat tmp.py
import warnings
warnings.filterwarnings("ignore", category=FutureWarning)
print "FutureWarning switched off"
warnings.warn("yadda", category=FutureWarning)
0xffffffff

$ rm tmp.pyc
$ python2.3 -c'import tmp'
tmp.py:5: FutureWarning: hex/oct constants > sys.maxint will return positive
values in Python 2.4 and up
  0xffffffff
FutureWarning switched off

First you get the warning, then the "switched off" message. Oops.

$ python2.3 -c'import tmp'
FutureWarning switched off

When importing the module a second time you don't get the warning because
the compiled module already exists and is reused.

Note that you can disable warnings on the commmand line...

$ rm tmp.pyc
$ python2.3 -Wignore::FutureWarning -c'import tmp'
FutureWarning switched off

... but as others already told you it is normally not a good idea to squash
these warnings. Well, you have been warned ;)

Peter


From twisted0n3 at gmail.com  Thu Aug 23 18:30:58 2007
From: twisted0n3 at gmail.com (Twisted)
Date: Thu, 23 Aug 2007 22:30:58 -0000
Subject: Xah's Edu Corner: Under the spell of Leibniz's dream
In-Reply-To: <5j4rrfF3s3h2rU1@mid.dfncis.de>
References: <1187567809.896668.228650@z24g2000prh.googlegroups.com>
	<1187598193.118227.270460@19g2000hsx.googlegroups.com>
	<46ca1e65$1_3@news.chariot.net.au> <5j4rrfF3s3h2rU1@mid.dfncis.de>
Message-ID: <1187908258.609624.321990@m37g2000prh.googlegroups.com>

On Aug 23, 3:38 am, Matthias Buelow <m... at incubus.de> wrote:
> In comp.lang.lisp Bikal KC <nepbabucxspamf... at yahoo.ca> wrote:
>
> > I used usenet years ago then stopped for couple of years. I remember
> > seeing him/her on c.l.perl I believe doing the same thing he/she is
> > doing atm. I'd say the ultimate usenet superstar. Wow!
>
> I think it's some (probably mild) form of autism.
> No offense intended, Xah.

Yeah, yeah, that's what they all say, especially when they do that
most-common of usenet things -- insult your mental health and tone it
as if it were a very compassionate and understanding suggestion to
seek medical treatment rather than the flame that it is. :P



From newsgroups at debain.org  Wed Aug 29 15:46:11 2007
From: newsgroups at debain.org (Samuel)
Date: Wed, 29 Aug 2007 19:46:11 +0000 (UTC)
Subject: ANNOUNCE: Spiff Workflow 0.0.2
Message-ID: <fb4ie3$gdd$1@tamarack.fernuni-hagen.de>

Introduction
------------
Spiff Workflow is a library implementing a framework for workflows. It is 
based on http://www.workflowpatterns.com and implemented in pure Python.
Spiff Workflow is part of the Spiff platform, which aims to produce a 
number of generic libraries generally needed in enterprise applications. 
This release SHOULD NOT BE USED IN PRODUCTION ENVIRONMENTS - it is meant 
for development only.
Spiff Workflow is free software and distributed under the GNU LGPLv2.1.


New In This Release
-------------------
This release is a huge step forward and an essential rewrite that comes 
with many new features, bugfixes and improvements. The API is now even 
simpler to use, and support for the following workflow patterns was added 
(check the Workflow Patterns page for what they mean):

11. Implicit Termination
12. Multiple Instances without Synchronization
13. Multiple Instances with a Priori Design-Time Knowledge
14. Multiple Instances with a Priori Run-Time Knowledge
15. Multiple Instances without a Priori Run-Time Knowledge

23. Transient Trigger

28. Blocking Discriminator
29. Cancelling Discriminator
30. Structured Partial Join
31. Blocking Partial Join
32. Cancelling Partial Join
33. Generalized AND-Join

37. Acyclic Synchronizing Merge
38. General Synchronizing Merge

41. Thread Merge
42. Thread Split

Spiff Workflow now also supports persistence using Python's pickle 
module. The unit test suite was extremely improved and extended - every 
pattern now comes with a test.

The full ChangeLog is here:
http://spiff.googlecode.com/svn/trunk/libs/Workflow/ChangeLog


Dependencies
-------------
Python >= 2.4


Download
---------
Please check out the code from SVN:
svn checkout http://spiff.googlecode.com/svn/trunk/libs/Workflow/

You can also get a tarball from the release page:
http://pypi.python.org/pypi/Spiff%20Workflow/


Links:
-------
Example XML: http://spiff.googlecode.com/svn/trunk/libs/Workflow/tests/xml/patterns/
Spiff project page: http://code.google.com/p/spiff/
Mailing list: http://groups.google.com/group/spiff-devel
Bug tracker: http://code.google.com/p/spiff/issues/list
Documentation: http://spiff.googlecode.com/svn/trunk/libs/Workflow/README
Browse the source: http://spiff.googlecode.com/svn/trunk/libs/Workflow/

If you have any questions, please do not hesitate to ask.

-Samuel


From grante at visi.com  Thu Aug 23 13:57:22 2007
From: grante at visi.com (Grant Edwards)
Date: Thu, 23 Aug 2007 17:57:22 -0000
Subject: Socket recv(1) seems to block instead of returning end of file.
References: <mailman.164.1187862959.32294.python-list@python.org>
	<pan.2007.08.23.16.48.52.958428@datallegro.com>
Message-ID: <13crik2c8qtqgc3@corp.supernews.com>

On 2007-08-23, Dan Stromberg - Datallegro <dstromberg at datallegro.com> wrote:
> On Thu, 23 Aug 2007 11:54:01 +0200, Hendrik van Rooyen wrote:
>
>> 
>> While doing a netstring implementation I noticed that if you
>> build a record up using socket's recv(1), then when you close
>> the remote end down, the recv(1) hangs, despite having a short
>> time out of  0.1 set.
>> 
>> If however, you try to receive more than one char, (I tested with 3,
>> did not try 2), then when you shut the remote end down you do not
>> get a time out, but an empty string - the normal end of file, I suppose.
>> 
>> Has anybody else seen this behaviour?
>> 
>> The transmit side seems to give a broken pipe error, which is fine.
>> 
>> I am using stock standard SuSe 10, Python 2.4, out of the box.
>> 
>> - Hendrik
>
> Are you using sock.settimeout()?

FWIW, I added a call to sock.setttimeout(0.2) to my example's
receive code and added 0.1 delays in the transmit code, and it
still seems to work fine:

-------------------------------8<-------------------------------------
#!/usr/bin/python

# writer
import socket,random,time

HOST = ''                 # Symbolic name meaning the local host
PORT = 8765               # Arbitrary non-privileged port
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
print 'Connected to',((HOST,PORT))
total = 0
for i in range(10):
    data = "abcdefghijklmnopqrstuvwxyz"[:random.randint(1,20)]
    total += len(data)
    s.send(data)
    print "tx:",len(data)
    time.sleep(0.1)
s.close()
print total
-------------------------------8<-------------------------------------
#!/usr/bin/python

#reader
import socket

HOST = ''                 # Symbolic name meaning the local host
PORT = 8765               # Arbitrary non-privileged port
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(1)
conn, addr = s.accept()
print 'Connected by', addr
conn.settimeout(0.2)
total = 0
while 1:
    data = conn.recv(1)
    total += len(data)
    print "rx:",len(data)
    if not data: break
conn.close()
print total
-------------------------------8<-------------------------------------

-- 
Grant Edwards                   grante             Yow! We have DIFFERENT
                                  at               amounts of HAIR --
                               visi.com            


From deivys.ramirez at gmail.com  Tue Aug 28 19:49:10 2007
From: deivys.ramirez at gmail.com (Deivys Ramirez)
Date: Tue, 28 Aug 2007 18:49:10 -0500
Subject: Pythonic way of reading a textfile line by line without throwing an
	exception
In-Reply-To: <1ab7b8470708281647g59e685ect371f20aaea30b070@mail.gmail.com>
References: <1ab7b8470708281647g59e685ect371f20aaea30b070@mail.gmail.com>
Message-ID: <1ab7b8470708281649m4e94358dt3495172949b4c47e@mail.gmail.com>

Hi everyone,

I'm a Python newbie but have experience programming PHP and C so i'm
not really new to programming but new to Python.

What's the "pythonic" way of reading a text file, line by line,
without throwing an exception when there's nothing to be read?

I've been trying to map my while(!eof(fp)) mindset to the file object
Python gives me when I call open() but have had no good results.

Regards,

Deivys Ramirez
Lima-Peru


From jstroud at mbi.ucla.edu  Tue Aug 14 22:04:19 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 14 Aug 2007 19:04:19 -0700
Subject: accessing keys in dict
In-Reply-To: <1187143106.021325.104690@l22g2000prc.googlegroups.com>
References: <1187143106.021325.104690@l22g2000prc.googlegroups.com>
Message-ID: <f9tmv3$tt1$1@daisy.noc.ucla.edu>

james_027 wrote:
> hi,
> 
> a_dict = {'name':'apple', 'color':'red', 'texture':'smooth',
> 'shape':'sphere'}
> 
> is there any difference between ..
> 
> for key in a_dict:
> 
> from
> 
> for key in a_dict.keys():
> 
> 
> which is more preferred?

Use the first.

any difference in performance?

It doesn't matter. Wait until later to do these types of optimizations. 
Ask the list how to go about optimizing when the time comes.

James


-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From povkra at gmail.com  Mon Aug 13 06:55:21 2007
From: povkra at gmail.com (fritz)
Date: Mon, 13 Aug 2007 10:55:21 -0000
Subject: Air conditioners for free!??!?!!!
Message-ID: <1187002521.547470.50160@22g2000hsm.googlegroups.com>

http://airconlinks.blogspot.com/



From joshua at eeinternet.com  Wed Aug  1 18:11:10 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 01 Aug 2007 14:11:10 -0800
Subject: Wing IDE for Python v. 3.0 beta1 released
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
	<f8quug$m7j$1@sea.gmane.org>
	<496954360708011453h2a68dee4x48dcb15bb25ea717@mail.gmail.com>
Message-ID: <f8r0du$qhn$1@sea.gmane.org>

On Wednesday 01 August 2007 13:53, Robert Dailey wrote:
> He's secretly an employee of Wing IDE in disguise!!!

Sorry to destroy your conspiracy theories, but no, I've never been employed
by Wing IDE in any fashion, nor have I ever received any monetary
compensation from them in any form.  Just a satisfied user.  That's all.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From conra2004 at yahoo.com  Tue Aug 14 03:33:36 2007
From: conra2004 at yahoo.com (yadin)
Date: Tue, 14 Aug 2007 00:33:36 -0700
Subject: about negative polar plots not defined in python not even matlab
Message-ID: <1187076816.432607.7960@d55g2000hsg.googlegroups.com>

high i think everybody has seen dB radiation pattern plots...
well those are done with negative polar plots ...the values of the
magnitude in the axes are
NEGATIVE values...
but i can find a polar plot command that those negative plots not in
python not even in matlab

the polar plots represents the value of the power radiated in dB's and
the dB's go from -40dB to 0dB
as the angle theta changes from 0 to 2*pi rads
the polar plot in python goes with positive values
how can i solve this problem
rough example
example:
power = arange(-40,0,-10)
theta = arange(0, 2pi,pi/12)
polar(power,theta)
title.....?
how can i show the step on the polar plot  plot(-40, -30,-20,-10,0)



From f.guerrieri at gmail.com  Thu Aug 23 06:43:54 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Thu, 23 Aug 2007 12:43:54 +0200
Subject: Joining elements in a list to 1 element
In-Reply-To: <e75321bd0708230249k6e4670a2n9436902257c67f1@mail.gmail.com>
References: <e75321bd0708230249k6e4670a2n9436902257c67f1@mail.gmail.com>
Message-ID: <79b79e730708230343t5e2ec45dx9d334bbf48b75e55@mail.gmail.com>

On 8/23/07, dimitri pater <dimitri.pater at gmail.com> wrote:
>
> Dear all,
> I am having trouble joining elements in a list into 1 element.
> e.g. ['a','b','c'] into ['abc'] so that len(list) returns 1
>
>
You need to append the joined string to your new list.
For instance
my_list = ["a", "b", "c"]
my_second_list = []
my_second_list.append("".join(my_list))

bye,
Francesco
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From gagsl-py2 at yahoo.com.ar  Sun Aug  5 06:05:08 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 05 Aug 2007 07:05:08 -0300
Subject: (no) fast boolean evaluation ? missing NOT
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<mailman.1545.1186095368.22759.python-list@python.org>
	<1186096979.397596.36640@e16g2000pri.googlegroups.com>
	<eb4fb$46b2f7a6$d443bb3a$21643@news.speedlinq.nl>
	<1186152677.730158.111420@w3g2000hsg.googlegroups.com>
	<bmHsi.32231$EM7.1243196@phobos.telenet-ops.be>
Message-ID: <op.twkzmuu5x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 03 Aug 2007 11:56:07 -0300, Roel Schroeven  
<rschroev_nospam_ml at fastmail.fm> escribi?:

> Paul Boddie schreef:
>> On 3 Aug, 11:45, Stef Mientki <S.Mientki-nos... at mailbox.kun.nl> wrote:
>>> Sorry, my question missed the essential "NOT",
>>> here is an example, that behaves different in Delphi,
>>> (so I guess Delphi is not a real language ;-)
>>
>> Delphi is based on Pascal, and from what I can recall from my
>> university textbook, there isn't any mandatory short-circuit
>> evaluation in Pascal: it's an implementation-dependent feature.
>> Consequently, an expression involving boolean operators in such
>> languages may well evaluate each term (potentially causing side-
>> effects) before determining the final result.
>
> I even thought Pascal never uses short-circuit evaluation, and always
> evaluates all terms. I might be wrong about that though; it's been quite
> a long time since I've used Pascal.

Delphi defaults to short-circuit, but there is a compiler switch to make  
it evaluate all the arguments.
But most people rely on this, and write code like:

if (MyObject <> nil) and (MyObject.Event <> nil) then MyObject.Event(Self);

and that would break if not short-circuited.

-- 
Gabriel Genellina



From paul at boddie.org.uk  Wed Aug  1 18:45:32 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 01 Aug 2007 15:45:32 -0700
Subject: Bug in Time module, or in my understanding?
In-Reply-To: <mailman.1456.1186005796.22759.python-list@python.org>
References: <mailman.1456.1186005796.22759.python-list@python.org>
Message-ID: <1186008332.730742.56520@w3g2000hsg.googlegroups.com>

Joshua J. Kugler wrote:
> I am getting results like these with the time module:
>
> >>> import time
> >>> int(time.mktime(time.strptime('2007-03-11 02:00:00', '%Y-%m-%d %H:%M:%S')))
> 1173610800
> >>> int(time.mktime(time.strptime('2007-03-11 03:00:00', '%Y-%m-%d %H:%M:%S')))
> 1173610800
> >>> time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(1173610800))
> '2007-03-11 03:00:00'

This is quite a nice test case, actually. :-)

> I know it probably has something to do with daylight savings, but how can I
> get back out that which I put in?  The times concerned are all standard
> time, so how can I keep the time module from asserting its belief that I
> want to convert to daylight savings?

Well, I think that if you inspect the result of strptime, you'll see
that the last element of the time "tuple" - in fact, the tm_isdst
member of a time "structure" - is set to -1:

>>> time.strptime('2007-03-11 02:00:00', '%Y-%m-%d %H:%M:%S')
(2007, 3, 11, 2, 0, 0, 6, 70, -1)
>>> time.strptime('2007-03-11 03:00:00', '%Y-%m-%d %H:%M:%S')
(2007, 3, 11, 3, 0, 0, 6, 70, -1)

What is likely to happen when such results are passed to mktime is
that the underlying library function will use its discretion in
determining whether daylight savings time is in operation or not.

> Incidentally, it only happens with times on 2007-03-11  from 02:00:00 to
> 02:59:59, and not with time data from past years.

This suggests that the timezone database is being used to provide the
results. In fact, you can override the behaviour of mktime by
constructing time tuples or structures with other values for the last
element or tm_isdst respectively:

>>> time.mktime((2007, 3, 11, 2, 0, 0, 6, 70, -1))
1173574800.0
>>> time.mktime((2007, 3, 11, 2, 0, 0, 6, 70, 0))
1173574800.0
>>> time.mktime((2007, 3, 11, 2, 0, 0, 6, 70, 1))
1173571200.0
>>> time.mktime((2007, 3, 11, 3, 0, 0, 6, 70, -1))
1173578400.0
>>> time.mktime((2007, 3, 11, 3, 0, 0, 6, 70, 0))
1173578400.0
>>> time.mktime((2007, 3, 11, 3, 0, 0, 6, 70, 1))
1173574800.0

By asserting tm_isdst as being 0, the usual apparent interval between
the times is preserved.

Paul



From saint.infidel at gmail.com  Thu Aug  2 18:55:01 2007
From: saint.infidel at gmail.com (infidel)
Date: Thu, 02 Aug 2007 15:55:01 -0700
Subject: __call__ considered harmful or indispensable?
In-Reply-To: <mailman.1527.1186079415.22759.python-list@python.org>
References: <mailman.1527.1186079415.22759.python-list@python.org>
Message-ID: <1186095301.368622.280890@e9g2000prf.googlegroups.com>

I find it useful in certain situations.  In particular, I have used it
along with cx_Oracle to provide a python module that dynamically
mirrors a package of stored procedures in the database.  Basically I
had class StoredProcedure(object) and each instance of this class
represented a particular stored procedure in the database.  It just
made sense to use the __call__ method to make these instances
callable.  Seemed silly to use some other method to actually call the
stored procedure in the database from such an instance.



From robert.rawlins at thinkbluemedia.co.uk  Fri Aug  3 11:53:37 2007
From: robert.rawlins at thinkbluemedia.co.uk (Robert Rawlins - Think Blue)
Date: Fri, 3 Aug 2007 16:53:37 +0100
Subject: Devloper Wanted For Debugging / Optimizing
Message-ID: <010201c7d5e6$7946b5a0$6bd420e0$@rawlins@thinkbluemedia.co.uk>

Hello Chaps,

 

I've been writing (with your help) a small application over the past couple
of months but I'm really struggling to iron out all of the creases and its
seems to spring a few memory leaks that I'm unable to find and plug. It's
only a small app, around 500 lines of code I would guess, aside from the
usual python type things it deals with dbus and XML parsing using element
tree, But it's for an embedded Linux platform so keeping it lightweight and
memory leak free is an absolute must.

 

Is anyone interested to take this small project on to have a look at my
code? Perhaps give me a little bit of advice on where I'm going wrong?

 

I would be willing to pay someone for their much needed time to get the
final few creases ironed out, this isn't really stuff we can deal with on
the boards so something private is a must, hence I'm exploring the idea of a
paid contract.

 

If anyone is interested then please feel free to contact me off list.

 

Thanks again guys,

 

Rob

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From duncan.booth at invalid.invalid  Fri Aug  3 09:56:07 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 3 Aug 2007 13:56:07 GMT
Subject: __call__ considered harmful or indispensable?
References: <mailman.1527.1186079415.22759.python-list@python.org>
Message-ID: <Xns998197EDE9C86duncanbooth@127.0.0.1>

skip at pobox.com wrote:

> In this particular case it was clearly unnecessary and just obfuscated
> the code.  I'm wondering, are there some general cases where __call__
> methods of a user-defined class are simply indispensable?

I don't know that you couldn't live without __call__, but it would make 
some code harder to write and understand. The time you need __call__ is 
when you need an object which is callable and which also has methods. e.g. 
look at xmlrpclib:

server = ServerProxy('http://some.server.com/path')

server.method(x=5) retrieves the url http://some.server.com/path/method?x=5
server.method.submethod(x=5) retrieves the url 
http://some.server.com/path/method/submethod?x=5


There is no need here to distinguish between a callable object and an 
object used for traversal. I think without __call__, code to access web 
servers would be less clean.


From aleax at mac.com  Sat Aug 11 01:21:51 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 10 Aug 2007 22:21:51 -0700
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
	<46B8626A.2070303@bigfoot.com>
	<mailman.1726.1186537161.22759.python-list@python.org>
	<5hsoi3F3mlni2U1@mid.individual.net> <f9ceb9$jsm$1@sea.gmane.org>
	<1186581124.3383.55.camel@dot.uniqsys.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
	<slrnfbk19k.20o.horpner@FIAD06.norwich.edu>
Message-ID: <1i2nhxn.tme05x17r39odN%aleax@mac.com>

Neil Cerutti <horpner at yahoo.com> wrote:
   ...
> The Python Language Reference seems a little confused about the
> terminology.
> 
>   3.4.7 Emulating numeric types
>   6.3.1 Augmented assignment statements
> 
> The former refers to "augmented arithmetic operations", which I
> think is a nice terminology, since assignment is not necessarily
> taking place. Then the latter muddies the waters.

Assignment *IS* "necessarily taking place"; if you try the augmented
assignment on something that DOESN'T support assignment, you'll get an
exception.  Consider:

>>> tup=([],)
>>> tup[0] += ['zap']
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'tuple' object does not support item assignment

Tuples don't support item ASSIGNMENT, and += is an ASSIGNMENT, so tuples
don't allow a += on any of their items.

If you thought that += wasn't an assignment, this behavior and error
message would be very problematic; since the language reference ISN'T
confused and has things quite right, this behavior and error message are
perfectly consistent and clear.


Alex


From snmavronis at comcast.net  Tue Aug 21 20:50:10 2007
From: snmavronis at comcast.net (Steve Mavronis)
Date: Tue, 21 Aug 2007 20:50:10 -0400
Subject: Python 2.51 install on Vista "files in use"
Message-ID: <dcOdnZobNrajFVbbnZ2dnUVZ_gKdnZ2d@comcast.com>

I tried to install Python 2.51 on Microsoft Vista Ultimate 32-bit because I 
use the 3D modeler software Blender 2.44, in case I needed additional Python 
support in the future for add-on scripts.

I got a warning about "files in use" during installation that needed 
updating. I aborted the install since the files were Intel Viiv and 
Microsoft Vista Media Center related so didn't want to mess them up. Can 
someone explain why Python wants to update those files?

Thanks in advance...



From http  Wed Aug  8 08:33:46 2007
From: http (Paul Rubin)
Date: 08 Aug 2007 05:33:46 -0700
Subject: Issues of state
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1680.1186416061.22759.python-list@python.org>
	<7x3aywr4tc.fsf@ruckus.brouhaha.com>
	<mailman.1684.1186422197.22759.python-list@python.org>
	<gg9mo4-p2m.ln1@lairds.us> <7x8x8mpn37.fsf@ruckus.brouhaha.com>
	<5htpcrF3lqmrnU1@mid.individual.net>
Message-ID: <7x7io6dx3p.fsf@ruckus.brouhaha.com>

greg <greg at cosc.canterbury.ac.nz> writes:
> An X server connection is *much* more stateful than
> an HTTP one. It persists throughout the entire use
> session of the application, for one thing, and there
> is heaps of state being kept on both sides of the
> connection. There's also a very high communication
> bandwidth between them. There's really no comparison.

The high bandwidth and persistence is not needed for an http
connection, which just gets a form submission once in a while.  The
persistence and bandwidth is instead present in the X connection
between the window system and the browser.


From mccredie at gmail.com  Fri Aug 31 12:53:40 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Fri, 31 Aug 2007 09:53:40 -0700
Subject: So what exactly is a complex number?
In-Reply-To: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
Message-ID: <9e95df10708310953w5dfef0adg88ff7c22eece5816@mail.gmail.com>

> So what exactly is a complex number?
It is a math construct, and has almost nothing to do with Python,
other than the fact that Python has a data type for them.

So, here is a list of better ways to get information about complex
numbers than asking python-list:

1. Google it: http://www.google.com/search?q=Complex+Numbers
2. Wikipedia: See the first result of the above
3. Ask a math teacher
4. Just stay in school and do your math homework. You will learn about
it eventually.


From orsenthil at users.sourceforge.net  Sun Aug  5 07:20:06 2007
From: orsenthil at users.sourceforge.net (O.R.Senthil Kumaran)
Date: Sun, 5 Aug 2007 16:50:06 +0530
Subject: Best programs written completly in Python
In-Reply-To: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
Message-ID: <20070805112006.GA3558@gmail.com>

* Franz Steinh?usler <franz.steinhaeusler at gmx.at> [2007-08-05 12:14:38]:

> wWhat are the best programs in your opinion, written entirly
> in pyhton, divided into categories like:
> a) Games
> b) Utilities/System
> c) Office
> d) Web/Newsreader/Mail/Browser

Its a difficult question to answer as the software are aplenty and there is no
judgement basis as this one is the best.

Head on to www.python.org and see for yourself for programs under each
category.

And moreover, "written entirely in python" is a constrain to find the
programs. Why do you need such a list for?

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From bronger at physik.rwth-aachen.de  Fri Aug 24 06:43:09 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 24 Aug 2007 12:43:09 +0200
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com> <87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com> <87tzqp77my.fsf@wilson.homeunix.com>
	<7xy7g1if24.fsf@ruckus.brouhaha.com>
	<87mywh717i.fsf@wilson.homeunix.com>
	<1187947900.676122.144490@e9g2000prf.googlegroups.com>
Message-ID: <87absh6wn6.fsf@wilson.homeunix.com>

Hall?chen!

olive writes:

> [...]
>
>> Well, because they are awful.  ;-) I don't see that there is a
>> bunch of already existing projects, in fact, I don't see anyone
>> challenging LaTeX at all.  However, competition is a good thing,
>> and I think there are enough aspects about LaTeX that can be done
>> better so that this project is worth being done.
>
> What about ODF ? (http://www.odfalliance.org/) Isn't it a good
> competitor ?

I'd be a nice further backend but I doubt that people want to enter
XML.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From raims at dot.com  Fri Aug 17 10:33:56 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Fri, 17 Aug 2007 16:33:56 +0200
Subject: how to pass a custom object to re.search?
References: <1187359347.755104.118660@r29g2000hsg.googlegroups.com>
	<1i2zz9z.jb9h6m13ontqgN%raims@dot.com>
	<1187360512.063710.182450@r29g2000hsg.googlegroups.com>
Message-ID: <1i300lf.yiy8j81a5zpzaN%raims@dot.com>

<brunovianarezende at gmail.com> wrote:
> and I'm also curious to know if it is possible to do that... :-)

Only if re.search() doesn't check for the type of the argument, which it
seems it does. 

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From bj_666 at gmx.net  Wed Aug  1 07:10:21 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 1 Aug 2007 11:10:21 GMT
Subject: access the name of my method inside it
References: <1185959202.302467.276080@x35g2000prf.googlegroups.com>
	<5hb1ebF3inuf2U6@mid.uni-berlin.de>
	<mailman.1427.1185966164.22759.python-list@python.org>
Message-ID: <5hb80tF3inuf2U7@mid.uni-berlin.de>

On Wed, 01 Aug 2007 07:01:42 -0400, Steve Holden wrote:

> Marc 'BlackJack' Rintsch wrote:
>> On Wed, 01 Aug 2007 09:06:42 +0000, james_027 wrote:
>> 
>>> for example I have this method
>>>
>>> def my_method():
>>>     # do something
>>>
>>>     # how do I get the name of this method which is my_method here?
>> 
>> Why do you need this?  There are ways but those are not really good for
>> production code.
>> 
> Maybe he wants to write a recursive method?
> 
> Once way is to call self.__calss__.mymethod(self). Ugly, isn't it?

Ugly yes, unnecessary convoluted yes, solution no.  You typed `my_method`
in the source.  The OP wants to know how to avoid that.

>  >>> class p:
> ...   def mymethod(self, n):
> ...     if n <= 1:
> ...       return 1
> ...     else:
> ...       return n * self.__class__.mymethod(self, n-1)

Why not simply ``self.mymethod(n - 1)`` instead!?

Ciao,
	Marc 'BlackJack' Rintsch


From python at jayloden.com  Mon Aug 13 23:33:08 2007
From: python at jayloden.com (Jay Loden)
Date: Mon, 13 Aug 2007 23:33:08 -0400
Subject: Python script for mobile platforms -- suggested?
In-Reply-To: <496954360708131727o5276d5a5w57baff6cbea4c34c@mail.gmail.com>
References: <496954360708121958m170b6cd2j8419802dcdd35482@mail.gmail.com>
	<496954360708131727o5276d5a5w57baff6cbea4c34c@mail.gmail.com>
Message-ID: <46C12274.2070705@jayloden.com>

Robert Dailey wrote:
>     I'm currently developing a game for a cell phone. The game has a GUI
>     system that's currently using XML to define the individual menus.
>     Basically this means that for every single menu the user goes to, it
>     loads and parses an XML file. Would using Python Script instead of
>     XML be a reasonable replacement, or would it be even slower? I've
>     read various articles online but I'm still curious to hear what
>     everyone has to say here.

A number of questions come to mind...for starters:

1) What is parsing the XML now? C code? Python? 
2) What is the proposed python script supposed to do when they load the menu? without knowing that or seeing some sample code or details, that's an impossible question to answer, since an arbitrary Python script might take milliseconds, seconds, hours, or days to complete running.

It might help if you give a concrete example (code is always welcome!) and explained exactly what the options are that you're considering and why. Then the folks on the list can try to give you a rough estimate or possibly suggest alternative methods you may not have considered. 

-Jay


From slippy.lane at googlemail.com  Sat Aug  4 14:18:01 2007
From: slippy.lane at googlemail.com (Slippy)
Date: Sat, 04 Aug 2007 18:18:01 -0000
Subject: Problems with headers in email.message
In-Reply-To: <mailman.1618.1186244095.22759.python-list@python.org>
References: <1186241903.509471.26460@d55g2000hsg.googlegroups.com>
	<mailman.1618.1186244095.22759.python-list@python.org>
Message-ID: <1186251481.199554.311760@g4g2000hsf.googlegroups.com>

Carsten, changing to m.as_string() worked perfectly - Thanks for the
help.

The actual project I'm working on is a lot more complex than the
simple case I've shown you, and does warrant the use of the message
parser, honest! :-)

On Aug 4, 5:14 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> On Sat, 2007-08-04 at 15:38 +0000, Slippy wrote:
> > [...]
> > import smtplib, email
> > from email.message import Message
> > m = Message( )
> > m['From'] = 'Slippy <u... at myemail.com>'
> > m['To'] = 'mygroup at googlegroups.com'
> > m['Subject'] = 'A Test Message'
> > m.set_payload('This is a test email. Please ignore')
> > s = smtplib.SMTP('smtp.myemail.com')
> > failed =
> > s.sendmail('u... at myemail.com','mygroup at googlegroups.com',str(m))
> > if failed:
> >  print 'Message sending failed.'
> > else:
> >  print 'Message sent.'
> > print 'Bye.'
> > -------------Snip Here-------------Snip Here-------------Snip
> > Here-------------
>
> > Now, I get all the right responses, and the message sends ok. I go and
> > check my inbox, and the message is there, but the From, To and Subject
> > lines I created (as well as a preceding blank line and a "From nobody"
> > line) are in the message body, followed by the body text.
>
> > How do I assign values to the header?
>
> The way you're doing it is fine as far as assigning headers goes. My
> semi-educated guess is that either your mail-transfer agent or Google
> Groups' MTA is being confused by the "Unix From" envelope (that's the
> "From nobody..." you're seeing) that is included by str(m).
>
> Try m.as_string() instead, which doesn't include the Unix From envelope.
>
> I'd also like to point out that email.message is overkill for your
> simple use case. An email message is simply a series of headers followed
> by a blank line followed by the message body, which you can easily build
> manually if the headers aren't too long and the body is plain text:
>
> email_message = """\
> From: %s
> To: %s
> Subject: %s
>
> %s""" % (email_from, email_to, email_subject, email_body)
>
> HTH,
>
> --
> Carsten Haesehttp://informixdb.sourceforge.net




From bcc at nospam.net  Wed Aug  8 17:50:12 2007
From: bcc at nospam.net (Bryan)
Date: Wed, 08 Aug 2007 21:50:12 GMT
Subject: How to reset sys.exec_prefix?
In-Reply-To: <fPqui.2806$IE5.17@newssvr17.news.prodigy.net>
References: <fPqui.2806$IE5.17@newssvr17.news.prodigy.net>
Message-ID: <oUqui.48213$YL5.12358@newssvr29.news.prodigy.net>

Bryan wrote:
> Somehow on my linux box I scrood things up and I lost my python path info.
> 
> If I check sys.exec_prefix or sys.prefix it shows '/usr/local/', where 
> it should show '/usr/'.
> 
> Is there a config file somewhere that I can change to fix this, or do I 
> need to do a rebuild/reinstall?  Hope not.
> 
> Thanks,
> B

Actually to clarify a bit here's what I see:

 >>> sys.prefix
'/usr/local'
 >>> sys.path
['', '/usr/local/lib/python25.zip', '/usr/local/lib/python2.5', 
'/usr/local/lib/python2.5/plat-linux2', 
'/usr/local/lib/python2.5/lib-tk', 
'/usr/local/lib/python2.5/lib-dynload', 
'/usr/local/lib/python2.5/site-packages', 
'/usr/local/lib/python2.5/site-packages/PIL']

I am thinking that the prefix is prepended to all the paths.

All my stuff lives in 'usr/lib/python2.5', so I was hoping by just 
changing my prefix it would set the rest of the paths accordingly.

B


From steve at REMOVE.THIS.cybersource.com.au  Sat Aug  4 00:37:39 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 04 Aug 2007 14:37:39 +1000
Subject: How to pass a reference to the current module
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<pan.2007.08.04.01.46.50.985228@REMOVE.THIS.cybersource.com.au>
	<7xy7gs9ioe.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.08.04.04.37.38.567054@REMOVE.THIS.cybersource.com.au>

On Fri, 03 Aug 2007 18:45:21 -0700, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
>>         namespace = module.__dict__
>>     return namespace[name]
> 
> Am I missing something?  It's likely that I just don't understand
> the problem, but I don't understand these dictionary extractions
> for what I thought would be an attribute lookup:

Well, the *real* reason I used a __dict__ extraction was because I didn't
think of using getattr at the time, but as a post facto justification,
I'll point at the difficulty in using getattr for extracting a function
from the current module:

>>> def f(x):
...     return x + 1
... 
>>> func = getattr(???, 'f') # what should go there?


Maybe I've just got a blind spot, but I can't think of a way to use
getattr to get something from the current module. That would lead to
something like this:


def get_function_from_name(name, module=None):
    if module is None:
        return globals()[name] # or use locals()
    else: 
        return getattr(name, module)

which is fine, I suppose, and I would have used it earlier if I had
thought of it *wink*


-- 
Steven.



From hermit at please.dont.bother.com  Sun Aug 19 16:35:36 2007
From: hermit at please.dont.bother.com (Hermit)
Date: Sun, 19 Aug 2007 21:35:36 +0100
Subject: Latest models of Gibson guitars
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
Message-ID: <QsCdnfC5hI4ENFXbnZ2dnUVZ8v2vnZ2d@bt.com>


<mobilendd at gmail.com> wrote in message 
news:1187544898.289948.322160 at 22g2000hsm.googlegroups.com...
> Reviews of latest models of best guitars, fender, gibson, yamaha, and
> many more, with pictures and prices.
>
> http://pro-guitars.blogspot.com/
>
>
> And if you want to win a free guitar go here
>
> http://freeguitars.blogspot.com/
>

How does the image quality compare with a DSLR?





From abalter at indiana.edu  Mon Aug 13 14:09:41 2007
From: abalter at indiana.edu (Ariel Balter)
Date: Mon, 13 Aug 2007 11:09:41 -0700
Subject: Dictionary viewer and editor
Message-ID: <46C09E65.6060607@indiana.edu>

http://mail.python.org/pipermail/python-list/2001-August/100288.html

Did you ever finish writing this?

-- 
<>0<>0<>0<>0<>0<>0<>0<>0<>0<>0

Ariel Balter

Swain Hall West 025
Department of Physics
Indiana University, Bloomington
737 E Third Street, 47404

abalter at indiana.edu

Office: (812) 855-2441
Home: (812) 332-2721



From michael.a.dorrian at gmail.com  Thu Aug 23 09:14:21 2007
From: michael.a.dorrian at gmail.com (Michael Dorrian)
Date: Thu, 23 Aug 2007 22:14:21 +0900
Subject: Problems Connecting to Crystal Reports table and changing field values
Message-ID: <628258080708230614u6b955389v291ab5130aefec8b@mail.gmail.com>

Below  is the my code so far. I have one table with 7 fields in my report
and i want to clear these fields and then save the report as a different
name and then print. The saving and printing part seem fine but i cannot
seem to access the connection properties at all. I have the
ConnectionProperties lines commented out because they give an error and
there is no password or user name so thats not the problem it just gives an
error saying connection properties was not recognized function name which it
should be??. Also finally how can i change these field names inside the
"tbl" table below.


import sys
from win32com.client import Dispatch

server="C:\\xxxxxx" #only an example

app = Dispatch('CrystalRunTime.Application')
rep = app.OpenReport('C:\\testers.rpt')
rep.ReadRecords()
tbl = rep.Database.Tables.Item(1)
#prop = tbl.ConnectionProperties('Data Source')
#prop.Value = 'server'

rep.ExportOptions.FormatType = 1
rep.ExportOptions.DestinationType = 1
rep.ExportOptions.DiskFileName = "C:\\Testerss.rpt"
rep.Export(False)
rep.PrintOut(promptUser=False)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070823/e26c1f54/attachment.html>

From mccredie at gmail.com  Tue Aug 28 20:56:52 2007
From: mccredie at gmail.com (Matimus)
Date: Wed, 29 Aug 2007 00:56:52 -0000
Subject: Haskell like (c:cs) syntax
In-Reply-To: <fb25uh$gl9$1@online.de>
References: <fb25uh$gl9$1@online.de>
Message-ID: <1188349012.502720.296440@x40g2000prg.googlegroups.com>

> Is there a pattern matching construct in Python like (head : tail), meaning
> 'head' matches the first element of a list and 'tail' matches the rest? I
> could not find this in the Python documentation.

Not really, but you could do something like this:

[code]
def foo(head, *tail):
    #do stuff with head and tail

foo(*seq)
[/code]

Also, Python 3.0 will have `Extended Iterable Unpacking'
http://www.python.org/dev/peps/pep-3132/

This isn't quite the same as Haskell's type matching, but would enable
similar behavior in some cases.

example:
[code]
head, *tail = seq
[/code]

Which would assign the first element of seq to head, and the remainder
to tail.

Matt



From mccredie at gmail.com  Mon Aug 27 14:40:06 2007
From: mccredie at gmail.com (Matimus)
Date: Mon, 27 Aug 2007 18:40:06 -0000
Subject: convert non-delimited to delimited
In-Reply-To: <1188237563.889663.228970@o80g2000hse.googlegroups.com>
References: <1188237563.889663.228970@o80g2000hse.googlegroups.com>
Message-ID: <1188240006.441422.40400@i38g2000prf.googlegroups.com>

On Aug 27, 10:59 am, RyanL <ryanlaurit... at gmail.com> wrote:
> I'm a newbie!  I have a non-delimited data file that I'd like to
> convert to delimited.
>
> Example...
> Line in non-delimited file:
> 0139725635999992000010100534+42050-102800FM-15+1198KAIA
>
> Should be:
> 0139,725635,99999,2000,01,01,00,53,4,+42050,-102800,FM-15,+1198,KAIA
>
> What is the best way to go about this?  I've looked all over for
> examples, help, suggestions, but have not found much.  CSV module
> doesn't seem to do exactly what I want.  Maybe I'm just missing
> something or not using the correct terminology in my searches.  Any
> assistance is greatly appreaciated!  Using Python 2.4

I don't think you are going to find anything that will just do this
for you. You are going to have read the file, figure out where to
split the string, and reprint it delimited with commas. As for
suggesting code... I can't tell how you actually want to delimit the
stuff from the above example? Are the fields always a fixed number of
characters? If they aren't then is there some other method for
determining how many characters to group into a field? From the looks
of it you could split that string any way you want and get something
that looks right, but isn't.

Matt



From pcb2103 at columbia.edu  Fri Aug  3 22:50:58 2007
From: pcb2103 at columbia.edu (Coogan)
Date: Fri, 03 Aug 2007 22:50:58 -0400
Subject: Website data-mining.
Message-ID: <1186195858.46b3e992a0605@cubmail.cc.columbia.edu>

Hi--


I'm using Python for the first time to make a plug-in for Firefox.
The goal of this plug-in is to take the source code from a website
and use the metadata and body text for different kinds of analysis.
My question is: How can I retrieve data from a website? I'm not even
sure if this is possible through Python. Any help?




nieu


From jstroud at mbi.ucla.edu  Fri Aug 24 12:44:42 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 24 Aug 2007 16:44:42 GMT
Subject: How to replace a method in an instance.
In-Reply-To: <mailman.261.1187972788.32294.python-list@python.org>
References: <mailman.258.1187971369.32294.python-list@python.org>	<1187971953.261328.219000@q3g2000prf.googlegroups.com>
	<mailman.261.1187972788.32294.python-list@python.org>
Message-ID: <_VDzi.21217$eY.377@newssvr13.news.prodigy.net>

Steven W. Orr wrote:
> On Friday, Aug 24th 2007 at 09:12 -0700, quoth kyosohma at gmail.com:
> 
> =>On Aug 24, 11:02 am, "Steven W. Orr" <ste... at syslang.net> wrote:
> =>> In the program below, I want this instance to end up calling repmeth
> =>> whenever inst.m1 is called. As it is now, I get this error:
> =>>
> =>> Hello from init
> =>> inst =  <__main__.CC instance at 0x402105ec>
> =>> Traceback (most recent call last):
> =>>    File "./foo9.py", line 17, in ?
> =>>      inst.m1()
> =>> TypeError: repmeth() takes exactly 1 argument (0 given)
> =>>
> =>> #! /usr/bin/python
> =>> def repmeth( self ):
> =>>      print "repmeth"
> =>>
> =>> class CC:
> =>>      def __init__( self ):
> =>>          self.m1 = repmeth
> =>>          print 'Hello from init'
> =>>
> =>>      def m1 ( self ):
> =>>          print "m1"
> =>>
> =>> inst = CC()
> =>> inst.m1()
> 
> =>Remove "self" from repmeth as it's not required in a function, only in
> =>functions that are defined within a class. Of course, a function in a
> =>class is also know as a method.
> 
> Sorry. I need repmeth to have self passed to it automatically if it's 
> called. I didn't mean to obfuscate the problem by not making a reference 
> to self in repmeth. 

At least you are consistent in that you obfuscate every question.

Here's what you seem to want:



import types

def repmeth(self):
   print "repmeth"

# inherit from object!
class CC(object):
   def __init__(self):
     self.m1 = types.MethodType(repmeth, self)
     print 'Hello from init'
   def m1(self):
     print 'm1'

inst = CC()
inst.m1()



Output:

py> import types
py>
py> def repmeth(self):
...   print "repmeth"
...
py> # inherit from object!
py> class CC(object):
...   def __init__(self):
...     self.m1 = types.MethodType(repmeth, self)
...     print 'Hello from init'
...   def m1(self):
...     print 'm1'
...
py> inst = CC()
Hello from init
py> inst.m1()
repmeth



James


From SMERSH009X at gmail.com  Fri Aug  3 22:16:43 2007
From: SMERSH009X at gmail.com (SMERSH009)
Date: Sat, 04 Aug 2007 02:16:43 -0000
Subject: PYTHON PROGRAMMING HELP PLSSS !!
In-Reply-To: <mailman.1552.1186104624.22759.python-list@python.org>
References: <mailman.1552.1186104624.22759.python-list@python.org>
Message-ID: <1186193803.737871.310250@d30g2000prg.googlegroups.com>

On Aug 2, 6:24 pm, "Dennis" <altayd... at yahoo.com> wrote:
> HI All,
> i am a 4th year business student and i took web design online course
> for fun however i did not see that last 2 chapters were python
> programming.This has no relevance to my major nor does it have any
> contribution to my degree. My fun turned out to be my nightmare since
> i literally can not grasp the main idea like other computer science
> students. To sum up , i need help with the following code, please do
> not send me emails telling me that outside class help is not provided
> or etc, this is not my major related course and this might also affect
> my graduation date.
> This is the working sample program ;http://cmpt165.cs.sfu.ca/~ggbaker/examples/chequebook.html
> If interested please email me, i am ready to make it up for your time
> that you spend to get me out of this mess.
> thanks

What exactly do you need done? Be more specific instead of just
pasting a link to a page
Also, you might want to state how much you are willing to 'compensate'
someone.
Maybe you will get more responses this way :)



From michele.simionato at gmail.com  Fri Aug 10 13:38:38 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Fri, 10 Aug 2007 17:38:38 -0000
Subject: is there anybody using __del__ correctly??
In-Reply-To: <SradnX_-hI91BiHbnZ2dnUVZ_r6rnZ2d@comcast.com>
References: <1186731369.073644.158490@z24g2000prh.googlegroups.com>
	<1186762908.121319.35900@x35g2000prf.googlegroups.com>
	<SradnX_-hI91BiHbnZ2dnUVZ_r6rnZ2d@comcast.com>
Message-ID: <1186767518.953286.273820@i13g2000prf.googlegroups.com>

On Aug 10, 7:09 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> There were also a few recipes posted during this discussion that wrap
> weakrefs up a bit nicer so it's easier to use them in place of __del__:
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/519635http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/519610http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/519621
>
> Since they're using weakrefs, you shouldn't have to worry about some of
> the weirdness of __del__.
>
> STeVe

Then I will mention my own contribution to the cookbook,
which does not use weak references, but just atexit:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/523007



From paddy3118 at googlemail.com  Sat Aug  4 12:33:10 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 04 Aug 2007 16:33:10 -0000
Subject: (no) fast boolean evaluation ?
In-Reply-To: <1186240708.874804.271030@b79g2000hse.googlegroups.com>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<1186240708.874804.271030@b79g2000hse.googlegroups.com>
Message-ID: <1186245190.970687.307920@k79g2000hse.googlegroups.com>

On Aug 4, 4:18 pm, Paddy <paddy3... at googlemail.com> wrote:
> On Aug 2, 10:47 pm, Stef Mientki <S.Mientki-nos... at mailbox.kun.nl>
> wrote:
>
> > hello,
>
> > I discovered that boolean evaluation in Python is done "fast"
> > (as soon as the condition is ok, the rest of the expression is ignored).
>
> > Is this standard behavior or is there a compiler switch to turn it on/off ?
>
> > thanks,
> > Stef Mientki
>
> The following program shows a(clumsy)? way to defeat the short-
> circuiting:
>
> def f(x):
>   print "f(%s)=%s" % ('x',x),
>   return x
> def g(x):
>   print "g(%s)=%s" % ('x',x),
>   return x
>
> print "\nShort circuit"
> for i in (True, False):
>   for j in (True, False):
>     print i,j,":", f(i) and g(j)
>
> print "\nShort circuit defeated"
> for i in (True, False):
>   for j in (True, False):
>     print i,j,":", g(j) if f(i) else (g(j) and False)
>
> The output is:
>
> Short circuit
> True True : f(x)=True g(x)=True True
> True False : f(x)=True g(x)=False False
> False True : f(x)=False False
> False False : f(x)=False False
>
> Short circuit defeated
> True True : f(x)=True g(x)=True True
> True False : f(x)=True g(x)=False False
> False True : f(x)=False g(x)=True False
> False False : f(x)=False g(x)=False False
>
> - Paddy.

And here are the bits for boolean OR:


print "\n\nShort circuit: OR"
for i in (True, False):
  for j in (True, False):
    print i,j,":", f(i) or g(j)

print "\nShort circuit defeated: OR"
for i in (True, False):
  for j in (True, False):
    print i,j,":", (g(j) or True) if f(i) else g(j)

- Paddy.



From arkanes at gmail.com  Thu Aug  2 15:15:47 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 2 Aug 2007 14:15:47 -0500
Subject: __call__ considered harmful or indispensable?
In-Reply-To: <slrnfb4asc.24c.horpner@FIAD06.norwich.edu>
References: <mailman.1527.1186079415.22759.python-list@python.org>
	<slrnfb4asc.24c.horpner@FIAD06.norwich.edu>
Message-ID: <4866bea60708021215x725db247xc191b2a55ad940e0@mail.gmail.com>

On 8/2/07, Neil Cerutti <horpner at yahoo.com> wrote:
> On 2007-08-02, skip at pobox.com <skip at pobox.com> wrote:
> > I don't personally use __call__ methods in my classes, but I
> > have encountered it every now and then here at work in code
> > written by other people.  The other day I replaced __call__
> > with a more obvious method name, so now instead of executing
> >
> >     obj(foo, bar, baz)
> >
> > the code in question is
> >
> >     obj.execute(foo, bar, baz)
> >
> > In this case there was a bug.  Depending on inputs, sometimes
> > obj initialized to a class, sometimes an instance of that
> > class.  (I fixed that too while I was at it.)  The problem was
> > that the use of __call__ obscured the underlying bug by making
> > the instance as well as the class callable.
> >
> > In this particular case it was clearly unnecessary and just
> > obfuscated the code.  I'm wondering, are there some general
> > cases where __call__ methods of a user-defined class are simply
> > indispensable?
>
> In C++ they are called functors, and they are very useful as
> surrogate functions with state. I haven't seen them used in the
> same way in Python much, because Python has more immediate
> solutions to (most of) these problems.
>

I don't think I've ever written one (in Python) except to demonstrate
how it worked. Pythons built in functions have all the functionality
that you'd have to use a functor for in C++.


From horpner at yahoo.com  Fri Aug  3 08:53:19 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 03 Aug 2007 12:53:19 GMT
Subject: Efficient Rank Ordering of Nested Lists
References: <1186104049.022836.253470@e9g2000prf.googlegroups.com>
Message-ID: <slrnfb68lt.ho.horpner@FIAD06.norwich.edu>

On 2007-08-03, pablo.mitchell at gmail.com <pablo.mitchell at gmail.com> wrote:
> A naive approach to rank ordering (handling ties as well) of nested
> lists may be accomplished via:
>
>    def rankLists(nestedList):
>       def rankList(singleList):
>           sortedList = list(singleList)
>           sortedList.sort()
>           return map(sortedList.index, singleList)
>       return map(rankList, nestedList)
>
>    >>> unranked = [ [ 1, 2, 3, 4, 5 ], [ 3, 1, 5, 2, 4 ], [ -1.1, 2.2,
> 0, -1.1, 13 ] ]
>    >>> print rankLists(unranked)
>
>    [[0, 1, 2, 3, 4], [2, 0, 4, 1, 3], [0, 3, 2, 0, 4]]
>
> This works nicely when the dimensions of the nested list are
> small. It is slow when they are big.  Can someone suggest a
> clever way to speed it up?

Use binary search instead of linear.

 import bisect
 import functools

 def rankLists(nestedList):
   def rankList(singleList):
     sortedList = list(sorted(singleList))
     return map(functools.partial(bisect.bisect_left, sortedList), singleList)
   return map(rankList, nestedList)

-- 
Neil Cerutti
Facts are stupid things. --Ronald Reagan


From frikker at gmail.com  Mon Aug  6 13:54:21 2007
From: frikker at gmail.com (frikk)
Date: Mon, 06 Aug 2007 10:54:21 -0700
Subject: wxWindows - incorrect path on installation?
Message-ID: <1186422861.132899.50060@g4g2000hsf.googlegroups.com>

This should be a very simple one, sorry!

I installed wxWindows on my OS X box but I am unable to get my python
install to recognize the module.  Unfortunately I don't know a whole
lot about where modules install to or how to configure python to see
them.  IE: 'import wx' does not work - it says unknown module wx.

Do I need to tweak a path variable or something?

I have MacPython installed and the binary of wxWindows (wxPython) from
wxpython.com

Thanks guys,
Blaine



From jstroud at mbi.ucla.edu  Thu Aug  9 20:45:38 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 09 Aug 2007 17:45:38 -0700
Subject: Gotcha I never ran into before
In-Reply-To: <mailman.1815.1186692978.22759.python-list@python.org>
References: <mailman.1815.1186692978.22759.python-list@python.org>
Message-ID: <f9gcfi$1hv$1@daisy.noc.ucla.edu>

Brian Cole wrote:
> I've been programming in Python for about 6 years now. One of the
> features I adore the most is the very useful error messages and stack
> traces that make it easy to debug. However, today I ran into a
> difficult to trace bug because the stack trace was reporting the
> problem in the wrong place.
> 
> class Delegator(object):
>     def __init__(self, obj):
>         self.obj = obj
>     def __getattr__(self, attr):
>         return getattr(self.obj, attr)
> 
> class SpecializedDelegator(Delegator):
>     def get_blah(self):
>         return ["Returning Blah"].upper()
>     blah = property(fget=get_blah)
> 
> print SpecializedDelegator("Doesn't Matter").blah
> 
> The stack trace is:
> Traceback (most recent call last):
>   File "test.py", line 12, in ?
>     print SpecializedDelegator("Doesn't Matter").blah
>   File "test.py", line 5, in __getattr__
>     return getattr(self.obj, attr)
> AttributeError: 'str' object has no attribute 'blah'
> 
> Which is correct, but says nothing about the real problem inside the
> get_blah method. Is there a good reason that when a property's fget
> function throws an AttributeError that it should fall back on
> __getattr__? I would think since the attribute was explicitly defined
> as a property the property function should be allowed to fully crash
> and burn.
> 
> Note: This example is broken up into two classes because that is how I
> discovered it. Since both classes were in separate files it added to
> the agony of debugging this. Luckily I was making a small incremental
> change so I could just back up and figure out what went wrong.
> 
> Thanks,
> Brian

Your __getattr__ in in Delegator is circumventing the property in 
SpecializedDelegator:

py> class Delegator(object):
...     def __init__(self, obj):
...         self.obj = obj
...     def __getattr__(self, attr):
...         return getattr(self.obj, attr)
...
py> class SpecializedDelegator(Delegator):
...     def get_blah(self):
...         return ["Returning Blah"].upper()
...     blah = property(fget=get_blah)
...
py> print SpecializedDelegator("Doesn't Matter").blah
------------------------------------------------------------
Traceback (most recent call last):
   File "<ipython console>", line 1, in <module>
   File "<ipython console>", line 5, in __getattr__
<type 'exceptions.AttributeError'>: 'str' object has no attribute 'blah'

py> class Delegator(object):
...     def __init__(self, obj):
...         self.obj = obj
...     def __getattr__(self, attr):
...         if hasattr(self.obj, attr):
...           return getattr(self.obj, attr)
...         else:
...           return self.__getattribute__(attr)
...
py> class SpecializedDelegator(Delegator):
...     def get_blah(self):
...         return ["Returning Blah"].upper()
...     blah = property(fget=get_blah)
...
py> print SpecializedDelegator("Doesn't Matter").blah
------------------------------------------------------------
Traceback (most recent call last):
   File "<ipython console>", line 1, in <module>
   File "<ipython console>", line 8, in __getattr__
   File "<ipython console>", line 3, in get_blah
<type 'exceptions.AttributeError'>: 'list' object has no attribute 'upper'


James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From steven.bethard at gmail.com  Sun Aug 26 23:48:30 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 26 Aug 2007 21:48:30 -0600
Subject: Parser Generator?
In-Reply-To: <1188185192.735485.237740@57g2000hsv.googlegroups.com>
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
	<1188159150.755231.239390@o80g2000hse.googlegroups.com>
	<mailman.11.1188176757.28954.python-list@python.org>
	<1188185192.735485.237740@57g2000hsv.googlegroups.com>
Message-ID: <HtCdnaSzROkM1E_bnZ2dnUVZ_tmhnZ2d@comcast.com>

Paul McGuire wrote:
> On Aug 26, 8:05 pm, "Ryan Ginstrom" <softw... at ginstrom.com> wrote:
>> The only caveat being that since Chinese and Japanese scripts don't
>> typically delimit "words" with spaces, I think you'd have to pass the text
>> through a tokenizer (like ChaSen for Japanese) before using PyParsing.
> 
> Did you think pyparsing is so mundane as to require spaces between
> tokens?  Pyparsing has been doing this type of token-recognition since
> Day 1.  Looking for tokens without delimiting spaces was one of the
> first applications for pyparsing.  This issue is not unique to Chinese
> or Japanese text.  Pyparsing will easily find the tokens in this
> string:
> 
> y=a*x**2+b*x+c
> 
> as
> 
> ['y','=','a','*','x','**','2','+','b','*','x','+','c']

The difference is that in the expression above (and in many other 
tokenization problems) you can determine "word" boundaries by looking at 
the class of character, e.g. alphanumeric vs. punctuation vs. whatever.

In Japanese and Chinese tokenization, word boundaries are not marked by 
different classes of characters. They only exist in the mind of the 
reader who knows which sequences of characters could be words given the 
context, and which sequences of characters couldn't.

The closest analog would be to ask pyparsing to find the words in the 
following sentence:

ThepyparsingmoduleprovidesalibraryofclassesthatclientcodeusestoconstructthegrammardirectlyinPythoncode.

Most approaches that have been even marginally successful on these kinds 
of tasks have used statistical machine learning approaches.

STeVe


From ptmcg at austin.rr.com  Sun Aug 12 16:45:55 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sun, 12 Aug 2007 13:45:55 -0700
Subject: Regular Expression Grouping
In-Reply-To: <1186939262.144073.182450@z24g2000prh.googlegroups.com>
References: <1186939262.144073.182450@z24g2000prh.googlegroups.com>
Message-ID: <1186951555.338018.169930@g4g2000hsf.googlegroups.com>

On Aug 12, 12:21 pm, linnew... at gmail.com wrote:
>
> I cannot understand why 'c' constitutes a group here without being
> surrounded by "(" ,")" ?
>
> >>>import re
> >>> m = re.match("([abc])+", "abc")
> >>> m.groups()
>
> ('c',)
>

It sounds from the other replies that this is just the way re's work -
if a group is represented multiple times in the matched text, only the
last matching text is returned for that group.

This sounds similar to a behavior in pyparsing, in using a results
name for the parsed results.  Here is an annotated session using
pyparsing to extract this data.  The explicit OneOrMore and Group
classes and oneOf method give you a little more control over the
collection and structure of the results.

-- Paul

Setup to use pyparsing, and define input string.
>>> from pyparsing import *
>>> data = "abc"

Use a simple pyparsing expression - matches and returns each separate
character.  Each inner match can be returned as element [0], [1], or
[2] of the parsed results.
>>> print OneOrMore( oneOf("a b c") ).parseString(data)
['a', 'b', 'c']

Add use of Group - each single-character match is wrapped in a
subgroup.
>>> print OneOrMore( Group(oneOf("a b c")) ).parseString(data)
[['a'], ['b'], ['c']]

Instead of Group, set a results name on the entire pattern.
>>> pattern = OneOrMore( oneOf("a b c") ).setResultsName("char")
>>> print pattern.parseString(data)['char']
['a', 'b', 'c']

Set results name on the inner expression - this behavior seems most
like the regular expression behavior described in the original post.
>>> pattern = OneOrMore( oneOf("a b c").setResultsName("char") )
>>> print pattern.parseString(data)['char']
c

Adjust results name to retain all of the matched characters for the
given results name.
>>> pattern = OneOrMore( oneOf("a b c").setResultsName("char",listAllMatches=True) )
>>> print pattern.parseString(data)['char']
['a', 'b', 'c']



From joejacob21 at gmail.com  Mon Aug 13 23:27:02 2007
From: joejacob21 at gmail.com (joe jacob)
Date: Tue, 14 Aug 2007 03:27:02 -0000
Subject: Configuring apache to execute python scripts using mod_python
	handler
In-Reply-To: <1187023461.702423.53620@b79g2000hse.googlegroups.com>
References: <1187003808.725705.56070@q3g2000prf.googlegroups.com>
	<1187023461.702423.53620@b79g2000hse.googlegroups.com>
Message-ID: <1187062022.773051.27170@22g2000hsm.googlegroups.com>

On Aug 13, 9:44 pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> On Aug 13, 5:16 am, joe jacob <joejaco... at gmail.com> wrote:
>
>
>
> > I configured apache to execute python scripts using mod_python
> > handler. I followed below mentioned steps to configure apache.
>
> > 1. In http.conf I added
>
> >   <Directory "D:/softwares/Apache2.2/htdocs">
> >   AddHandler mod_python .py
> >   PythonHandler mptest
> >   PythonDebug On
> >   </Directory>
>
> > 2. Then I added the line "LoadModule python_module modules/
> > mod_python.so" to http.conf.
>
> > Then I tried execute the python script mentioned below from browser.
>
> > from mod_python import apache
> > def handler(req):
> > req.content_type = 'text/plain'
> > req.write("Hello World!")
> > return apache.OK
>
> > Then I am getting the following error
>
> > Traceback (most recent call last):
>
> >   File "D:\softwares\Python25\Lib\site-packages\mod_python
> > \importer.py", line 1537, in HandlerDispatch
> >     default=default_handler, arg=req, silent=hlist.silent)
>
> >   File "D:\softwares\Python25\Lib\site-packages\mod_python
> > \importer.py", line 1202, in _process_target
> >     module = import_module(module_name, path=path)
>
> >   File "D:\softwares\Python25\Lib\site-packages\mod_python
> > \importer.py", line 304, in import_module
> >     return __import__(module_name, {}, {}, ['*'])
>
> > ImportError: No module named mptest
>
> > I am using Apache 2.2.4, python 2.5 and mod_python-3.3.1.win32-py2.5-
> > Apache2.2.
>
> > I am able to execute python scripts by configuring apache to execute
> > the cgi scripts. But I want to execute it using mod_python as it is
> > faster compared to cgi mode. Someone please help me on this issue.
>
> 1) In the mod_python tutorial it says:
>
> -------
> 2.4 Testing
>
> ...
> ...
>
> 2. Add the following Apache directives, which can appear in either the
> main server configuration file, or .htaccess. If you are going to be
> using the .htaccess file, you will not need the <Directory> tag below
> (the directory then becomes the one in which the .htaccess file is
> located), ***and you will need to make sure the AllowOverride
> directive applicable to this directory has at least FileInfo
> specified. (The default is None, which will not work.)****
>
> <Directory /some/directory/htdocs/test>
>         AddHandler mod_python .py
>         PythonHandler mptest
>         PythonDebug On
> </Directory>
> --------
>
> Note the last sentence in the directions above.  I explain what is
> needed for that part at the link in (2) below.  Also note the
> directory listed in the opening <Directory> tag:
>
> /some/directory/htdocs/test
>
> That specifies a sub directory of htdocs.  That's because the htdocs
> directory has its own <Directory> tag in httpd.conf, which specifies
> the things you can to with it.  If you look around in httpd.conf, you
> will see the <Directory> tag that applies to htdocs.  Mine looks like
> this:
>
> <Directory "/Library/Apache2/htdocs">
> ...
> ...
> <Directory>
>
> The mod_python Testing tutorial wants you to create your own sub
> directory in htdocs, so that you can specify your own rules for that
> directory.  You're probably getting errors because you have two
> <Directory> tags in your httpd.conf file for the htdocs directory, and
> the second tag is overwriting the first one.
>
> 2) You can see the latter part of this thread for what I did to get
> mptest.py to work:
>
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> 3) I put any <Directory> tags I added to httpd.conf below the first
> <Directory> tag in http.conf, which is this one:
>
> <Directory "/Library/Apache2/htdocs">
>
> so that the ones lower down in the file will override the previous
> tags if there is a conflict.

Thank you very much I got it working.



From stefan.behnel-n05pAM at web.de  Mon Aug 27 14:29:59 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 27 Aug 2007 20:29:59 +0200
Subject: sorting a list of lists
In-Reply-To: <1188235267.790442.193830@q5g2000prf.googlegroups.com>
References: <1188233798.684136.263640@22g2000hsm.googlegroups.com>
	<1188235267.790442.193830@q5g2000prf.googlegroups.com>
Message-ID: <46D31827.9060400@web.de>

iapain wrote:
>> i would like to sort a list of lists. The list is first sorted on the
>> second item in the sub-lists (which I can do), then on the third item
>> (which I can't).
> 
> Write a comparator instead of dirty hacks
> 
> mylistoflist.sort(mycomparator)
> 
> def mycomparator(a, b):
>   #do

Taking advantage of stable sorting is totally not a hack. The OP just tried
the two sorting steps in the wrong order.

Stefan


From nmm1 at cus.cam.ac.uk  Fri Aug 24 06:58:46 2007
From: nmm1 at cus.cam.ac.uk (Nick Maclaren)
Date: 24 Aug 2007 10:58:46 GMT
Subject: Regular expression use
Message-ID: <famdl6$p9j$1@gemini.csx.cam.ac.uk>


For reasons that I won't explain, as they are too complicated
and not terribly relevant, I am interested in discovering what
people actually use regular expressions for.  Not the subject
domain, but the construction of the regular expressions.

I know about computer scientists and parsing, and I know about
the use of relatively simple ones for things like extracting
HTML links from Web pages.  But I don't have much feel for the
(probably rare but difficult) uses of more complex ones for
other purposes.  I have heard of several such uses, but don't
have an overall idea of what is going on.

Any pointers appreciated, to more-or-less anything.


Regards,
Nick Maclaren.


From ldo at geek-central.gen.new_zealand  Fri Aug 31 21:48:51 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 13:48:51 +1200
Subject: Looking for Delaunay triangulation module...
References: <13dge9m2339ka68@corp.supernews.com>
Message-ID: <fbag9e$gnm$3@lust.ihug.co.nz>

In message <13dge9m2339ka68 at corp.supernews.com>, Grant Edwards wrote:

> So for lack of a delaunay module, I'm stuck trying to port my
> application to Win32.

Why not run it under Cygwin? :)


From philippe.martin at att.net  Mon Aug 27 22:24:31 2007
From: philippe.martin at att.net (hg)
Date: Mon, 27 Aug 2007 19:24:31 -0700
Subject: SCF released to GPL
In-Reply-To: <46d29a6c$0$27404$ba4acef3@news.orange.fr>
References: <ZBnAi.21498$eY.43@newssvr13.news.prodigy.net>
	<46d29a6c$0$27404$ba4acef3@news.orange.fr>
Message-ID: <zHLAi.102$7P7.54@newssvr19.news.prodigy.net>

M?ta-MCI (MVP) wrote:
> Salut !
> 
> Le deuxi?me envoi aurait pu ?tre en fran?ais.
> Cela aurait ?vit? le doublon, tout en maintenant le message.
> 
> @+
> 
> Michel Claveau
> 

;-)

No:
1) The redundancy is due to the fact that I just moved to another 
state/ISP and that ... for some reason, the initial post did not show 
for quite some times.

2) I'm desperately searching for the French NG from my client but cannot 
find it ... any clue ? Maybe you can pass the message ?

hg


From software at ginstrom.com  Mon Aug 27 00:25:13 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Mon, 27 Aug 2007 13:25:13 +0900
Subject: Parser Generator?
In-Reply-To: <1188185192.735485.237740@57g2000hsv.googlegroups.com>
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com><1188159150.755231.239390@o80g2000hse.googlegroups.com><mailman.11.1188176757.28954.python-list@python.org>
	<1188185192.735485.237740@57g2000hsv.googlegroups.com>
Message-ID: <00a501c7e862$434876d0$020ba8c0@MOUSE>

> On Behalf Of Paul McGuire
> 
> On Aug 26, 8:05 pm, "Ryan Ginstrom" <softw... at ginstrom.com> wrote:
> > The only caveat being that since Chinese and Japanese scripts don't 
> > typically delimit "words" with spaces, I think you'd have 
> to pass the 
> > text through a tokenizer (like ChaSen for Japanese) before 
> using PyParsing.
> 
> Did you think pyparsing is so mundane as to require spaces 
> between tokens?  Pyparsing has been doing this type of 
> token-recognition since Day 1.

Cool! I stand happily corrected. I did write "I think" because although I
couldn't find a way to do it, there might well actually be one <g>. I'll
keep looking to find some examples of parsing Japanese.

BTW, I think PyParsing is great, and I use it for several tasks. I just
could never figure out a way to use it with Japanese (at least on the
applications I had in mind).

Regards,
Ryan Ginstrom



From bradfordh at gmail.com  Mon Aug 27 21:15:24 2007
From: bradfordh at gmail.com (-b)
Date: Mon, 27 Aug 2007 18:15:24 -0700
Subject: XML File -- dictionary edit/search
Message-ID: <1188263724.306539.181980@y42g2000hsy.googlegroups.com>

I am trying to put together a python program that will be able to ask
for a word and its definition, then save that information into an xml
file for reference. I am not down right set on the file being in xml
format, but xml is the first thing that comes to mind, since I do not
want to use a MySQL database. I think xml will be easy to search and
return a word's definition--another reason why xml comes to mind first
after MySQL databases. Please, if you have any suggestions to what
python-xml libraries I might use to program this small app with, then
by all means voice your thoughts. Thank you very much for your time.



From thomas at jollans.com  Mon Aug  6 06:36:30 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Mon, 6 Aug 2007 12:36:30 +0200
Subject: Emacs + python.
In-Reply-To: <00tzrdm1zd.fsf@googlemail.com>
References: <00tzrdm1zd.fsf@googlemail.com>
Message-ID: <200708061236.35507.thomas@jollans.com>

On Monday 06 August 2007, Hadron wrote:
> Sorry to repeat, but I had to reinstall and lost all my news.

This list is archived at a number of publically accessible sites, for example:

http://mail.python.org/pipermail/python-list/
http://dir.gmane.org/gmane.comp.python.general
http://www.mail-archive.com/python-list%40python.org/
http://groups.google.com/group/comp.lang.python/topics

I assume you already asked and got an answer, so you should now be able to 
find it.

-- 
      Regards,                       Thomas Jollans
GPG key: 0xF421434B may be found on various keyservers, eg pgp.mit.edu
Hacker key <http://hackerkey.com/>:
v4sw6+8Yhw4/5ln3pr5Ock2ma2u7Lw2Nl7Di2e2t3/4TMb6HOPTen5/6g5OPa1XsMr9p-7/-6
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From vedrandekovic at v-programs.com  Fri Aug 10 13:59:01 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Fri, 10 Aug 2007 10:59:01 -0700
Subject: py2exe with python 2.5
In-Reply-To: <1186749528.645498.27440@i13g2000prf.googlegroups.com>
References: <1186731595.139576.107660@e9g2000prf.googlegroups.com>
	<1186736574.092633.196100@d30g2000prg.googlegroups.com>
	<1186742871.144805.163450@q4g2000prc.googlegroups.com>
	<1186749528.645498.27440@i13g2000prf.googlegroups.com>
Message-ID: <1186768741.764667.114990@e9g2000prf.googlegroups.com>

On 10 kol, 14:38, Ant <ant... at gmail.com> wrote:
> On Aug 10, 11:47 am, vedrandeko... at v-programs.com wrote:
>
> > On 10 kol, 11:02, Ant <ant... at gmail.com> wrote:
> ...
> > yes,Python 2.5 is on the path, but how can I remove panda3d from that
> > path?
>
> Hit Win - Break to bring up the System Properties dialog (you can also
> get here through the Control Panel).
>
> Go to the Advanced tab, and click the "Environment Variables" button.
> Find the PATH variable in one of the two lists, and edit it. Just
> remove the Panda3D entry.
>
> Note you'll have to restart your console to pick up any changes.
>
> --
> Ant...
>
> http://antroy.blogspot.com/

Hi,

Ok,I have done that. But how can I restart console now?

Regards,
Vedran



From max at alcyone.com  Fri Aug 24 01:34:32 2007
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 23 Aug 2007 22:34:32 -0700
Subject: beginner, idiomatic python
In-Reply-To: <13csqk47j0c56b0@corp.supernews.com>
References: <13cqlqbbpn0dmea@corp.supernews.com><1187898049.734696.9500@l22g2000prc.googlegroups.com><13csi2tn49esmc3@corp.supernews.com>
	<mailman.230.1187928865.32294.python-list@python.org>
	<13csqk47j0c56b0@corp.supernews.com>
Message-ID: <CqSdnRl2x8928FPbnZ2dnUVZ_jSdnZ2d@speakeasy.net>

bambam wrote:

> Excellent. By symmetry, I see that "list" casts the set back into a list.
> 
> I wonder why list has not been extended with the same (difference,
> interesection) methods?  Casting to set looks a little kludgy:
> 
> c = list(set(a)-set(b))
> I wonder if that is clearer than the explicit loop?

This isn't a "cast" in the sense of some less-strongly-typed languages; 
it's just a conversion.  The `list` function/type iterates over its 
argument and turns it into a list.  Sets are iterable, so that's all 
that's really going on here.

The reason that lists don't have set-like methods is because lists 
aren't sets -- lists can contain duplicate elements, whereas sets 
cannot.  You should use the proper type for your needs; if you want to 
take two lists, remove duplicate elements, and then end up with a list, 
then the sets-difference-and-then-make-a-list mechanism is appropriate.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   It [freedom] must be demanded by the oppressed.
    -- Dr. Martin Luther King, Jr.


From researchbase at gmail.com  Thu Aug  2 13:31:17 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Thu, 2 Aug 2007 23:01:17 +0530
Subject: problems playing with dates from any month.
Message-ID: <f81479dd0708021031s208afc54y59780b19889d268b@mail.gmail.com>

hello,
I have a very strange problem and I can't find any solution for that.
I am working on an accounting package which I wish to develop in python.
the simple problem is that I want to knoe how I can know if the given
date is the nth day of a month.
for example if a customer is supposed to pay his installment on every
5th of all months,
I want to know if today is the fifth day (jan the fifth, feb the fifth
etc) for any given month.
I have not found any such function.
if I have looked (or over looked ) in the wrong places I am really sorry.
secondly I also want to know the way in which I can convert a given
string to a date object.
for example if I have a string "29/09/2005", I know it is a valid date
although it is in a string form.
now I want to convert the above string into a real date object.
how can I cast it this way?
regards,
Krishnakant.


From NO_Kroeger at gmx.de  Tue Aug 21 13:29:23 2007
From: NO_Kroeger at gmx.de (=?ISO-8859-1?Q?Nils_Oliver_Kr=F6ger?=)
Date: Tue, 21 Aug 2007 19:29:23 +0200
Subject: How to optimise this code?
In-Reply-To: <1187711974.29800.1206519007@webmail.messagingengine.com>
References: <1187711974.29800.1206519007@webmail.messagingengine.com>
Message-ID: <46CB20F3.7050307@gmx.de>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

David N Montgomery schrieb:
> class testCase:
>     def __init__(self, tc):
>         if tc == 1:self.testCase1()
>         if tc == 2:self.testCase2()
>         if tc == 3:self.testCase3()
>         if tc == 4:self.testCase4()
>         if tc == 5:self.testCase5()
>         if tc == 6:self.testCase6()
> 
>     def testCase1(self):
>         print "tc1"
> 
>     def testCase2(self):
>         print "tc2"
> 
>     def testCase3(self):
>         print "tc3"
> 
>     def testCase4(self):
>         print "tc4"
> 
>     def testCase5(self):
>         print "tc5"
> 
>     def testCase6(self):
>         print "tc6"
> 
> 
>     def testCaseX(self):
>         print "tcX"
> 
> totalNumberOfTestCases = 6
> x = 0
> while x <= totalNumberOfTestCases:
>     x += 1
>     testCase(x)
> 
> 
> This template code is working, but I envisage having 100+ test cases and
> am concerned about my useage of if statements. I would be grateful for
> any pointers as to how I can run all tests cases, regardless of how
> many, in a more efficient manner.
> 
> Thank you in advance.

Hi,

generally a flexible way to avoid huge blocks of if elsif elsif elsif
... ad infintum is to use pythons built in dictionary like this:
class Test:
    def __init__(self):
        self.cases = {1:self.test1,
                       2:self.test2,
                       3:self.test3
            }
        self._member = "I'm Test"

    def test1(self, param):
        print "one"
        print param
        print self._member

    def test2(self, param):
        print "two"
        print param
        print self._member

    def test3(self, param):
        print "three"
        print param
        print self._member


if __name__ == "__main__":
    t = Test()

    for x in range(1, 4):
        t.cases[x](x)

hope that helps ...

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFGyyDxzvGJy8WEGTcRAn2XAJ97z8o6Sxpi7euPtPUsm/FrD1bgEgCfeRcs
TKzwnkIdbs3GRI0yXcVUugM=
=HIJc
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From kevinar18 at hotmail.com  Tue Aug 28 21:10:59 2007
From: kevinar18 at hotmail.com (Kevin Ar18)
Date: Tue, 28 Aug 2007 21:10:59 -0400
Subject: Unable to read large files from zip
Message-ID: <BLU110-W2509B762B018FE0536BE75AACC0@phx.gbl>


I posted this on the forum, but nobody seems to know the solution: http://python-forum.org/py/viewtopic.php?t=5230

I have a zip file that is several GB in size, and one of the files inside of it is several GB in size.  When it comes time to read the 5+GB file from inside the zip file, it fails with the following error:
File "...\zipfile.py", line 491, in read bytes = self.fp.read(zinfo.compress_size)
OverflowError: long it too large to convert to int
Note: all the other smaller files up to that point come out just fine.
Here's the code:
------------------
import zipfile
import re
dataObj = zipfile.ZipFile("zip.zip","r")
for i in dataObj.namelist():
-----print i+" -- >="+str(dataObj.getinfo(i).compress_size /1024 / 1024)+"MB"
-----if(i[-1] == "/"):
----------print "Directory -- won't extract"
-----else:
----------fileName = re.split(r".*/",i,0)[1]
----------fileData = dataObj.read(i)


There have been one or more posts about 2GB limits with the zipfile module, as well as this bug report: http://bugs.python.org/issue1189216  Also, older zip formats have a 4GB limit.  However, I can't say for sure what the problem is.  Does anyone know if my code is wrong or if there is a problem with Python itself?
If Python has a bug in it, then is there any other alternative library that I can use (It must be free source: BSD, MIT, Public Domain, Python license; not copyleft/*GPL)?  If not that, is there any similarly licensed code in another language (like c++, lisp, etc...) that I can use?
_________________________________________________________________
Messenger Caf? ? open for fun 24/7. Hot games, cool activities served daily. Visit now.
http://cafemessenger.com?ocid=TXT_TAGLM_AugWLtagline

From cole at ccdc.cam.ac.uk  Mon Aug 13 10:25:11 2007
From: cole at ccdc.cam.ac.uk (porter)
Date: Mon, 13 Aug 2007 07:25:11 -0700
Subject: Getting started with JPype
In-Reply-To: <1187014607.465437.97460@19g2000hsx.googlegroups.com>
References: <1187014607.465437.97460@19g2000hsx.googlegroups.com>
Message-ID: <1187015111.158196.243780@w3g2000hsg.googlegroups.com>

Gah - I hate it when that happens: Just after posting I figured out my
silly mistake: my package is called myclasses and I was referencing
'myclass'

apologies for wasting your time




> Hi,
>
> For nefarious javaesque reasons I've been trying to get started with
> jpype (http://jpype.sourceforge.net). This looks like a potentially
> useful tool for integrating java classes into C-python, but
> frustratingly I've run into immediate problems. The documentation on
> the project really doesn't deal with 'the basics' and I believe it is
> this that I am running foul of: I have read much on the web, and I
> suspect that this is a classpath issue, but I can't see what I'm doing
> wrong.
>
> And I'm confident that the path I specify is ok
>
> The error I get is
>
> "Package myclass.HelloWorld is not Callable"
>
> but I suspect that this is, infact, telling me that the class
> HelloWorld could not be found.
>
> If so - why not? - Note that using java
>
> Here's my python code snippet
>
> from jpype import *
>
> startJVM(getDefaultJVMPath(), "-ea", "-Djava.class.path=D:/tmp/jpype-
> reli/test/dist/test.jar'' )
>
> package = JPackage("myclass")
> x = package.HelloWorld()
> x.do_a_message()
>
> shutdownJVM()
>
> I have a java class called HelloWorld in package "myclass" which
> resides in test.jar. The source is below:
>
> package myclasses;
>
> public class HelloWorld
> {
>
>     /** Creates a new instance of HelloWorld */
>     public HelloWorld()
>     {
>     }
>
>     public void message()
>     {
>         System.out.println("Hello, World");
>     }
>
>     public static void do_a_message()
>     {
>         System.out.println("Static Hello, World");
>     }
>
> }




From rrs at researchut.com  Wed Aug 15 15:16:15 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Wed, 15 Aug 2007 12:16:15 -0700
Subject: Module imports during object instantiation
In-Reply-To: <slrnfc6ieo.14k.horpner@FIAD06.norwich.edu>
References: <4c3vo4-u7k.ln1@learner.hq.netapp.com><f9pcuj$6n4$1@sea.gmane.org>
	<mailman.1931.1187030415.22759.python-list@python.org>
	<46c16ec9$0$405$426a34cc@news.free.fr>
	<mailman.1956.1187091452.22759.python-list@python.org>
	<slrnfc36p9.21o.horpner@FIAD06.norwich.edu>
	<mailman.1965.1187101832.22759.python-list@python.org>
	<slrnfc3gg4.1l4.horpner@FIAD06.norwich.edu>
	<mailman.2025.1187200876.22759.python-list@python.org>
	<slrnfc6ieo.14k.horpner@FIAD06.norwich.edu>
Message-ID: <1187205375.871837.254400@r34g2000hsd.googlegroups.com>

On Aug 15, 11:42 pm, Neil Cerutti <horp... at yahoo.com> wrote:
> On 2007-08-15, Ritesh Raj Sarraf <r... at researchut.com> wrote:
> > Or am I terribly missing something that you are trying to tell ?
>
> I didn't see log = Log() in your example. Sorry for the
> excursion.
>
> Are you sure os.name is 'posix' on your system?
>


Here again for you:

In [6]: cat rick.py
IPython system call: cat rick.py
import os, sys

class Log:
    def __init__(self, verbose, lock = None):
        self.VERBOSE = bool(verbose)
        self.lock = bool(lock)

        if self.lock:
            self.dispLock = threading.Lock()
        else:
            self.dispLock = None

        if os.name == 'posix':
            try:
                import foobar
            except ImportError, e:
                print >> sys.stderr, e

            self.platform = 'posix'
            self.color = get_colors()

        elif os.name in ['nt', 'dos']:
            self.platform = 'microsoft'
            try:
                import SomeModule
            except ImportError, e:
                # comment out next line before going to prod...
                print >> sys.stderr, e

                self.color = None
            else:
                self.color = SomeModule.get_colors_windows()
        else:
            self.platform = None
            self.color = None

In [7]: from rick import Log

In [8]: log = Log(verbose = True)
No module named foobar
---------------------------------------------------------------------------
exceptions.NameError                                 Traceback (most
recent call last)

/tmp/<ipython console>

/tmp/rick.py in __init__(self, verbose, lock)
     18
     19             self.platform = 'posix'
---> 20             self.color = get_colors()
     21
     22         elif os.name in ['nt', 'dos']:

NameError: global name 'get_colors' is not defined

In [9]: os.name
Out[9]: 'posix'

In [10]: import foobar
---------------------------------------------------------------------------
exceptions.ImportError                               Traceback (most
recent call last)

/tmp/<ipython console>

ImportError: No module named foobar

In [11]:


Okay!! Ignore line 20 for now because that is not what this whole
thread has been about. In the code, just 2 lines above "self.color =
get_colors()" you see the try/except import statements. Since there is
no "foobar" named module, an ImportError should have been thrown and a
relevant error message should have been printed.
With these example I'm just trying to prove that imports put into a
class' __init__() never get executed. They get executed if you put
them in any of the methods. (And I don't know why it is done this
way).

Ritesh



From joncle at googlemail.com  Mon Aug 27 17:17:31 2007
From: joncle at googlemail.com (Jon Clements)
Date: Mon, 27 Aug 2007 14:17:31 -0700
Subject: Biased random?
In-Reply-To: <favd0c$fcu$1@ss408.t-com.hr>
References: <favd0c$fcu$1@ss408.t-com.hr>
Message-ID: <1188249451.971581.12880@w3g2000hsg.googlegroups.com>

How about decorating your list of elements with an additional value,
which indicates the weight of that element. A value of 1 will indicate
'as likely as any other', < 1 will be 'less likely than' any other and
> 1 will be 'more likely than any other'. Then create a sorted list
based on the combined value of weight and the output of random(); from
this take the first N many elements to meet your requirements.

hth

Jon




On 27 Aug, 21:42, Ivan Voras <ivoras at __fer.hr__> wrote:
> Hi,
>
> I have a list of items, and need to choose several elements from it,
> "almost random". The catch is that the elements from the beginning
> should have more chance of being selected than those at the end (how
> much more? I don't care how the "envelope" of probability looks like at
> this point - can be linear). I see that there are several functions in
> Python standard libraries for various distribution, but is there an easy
> pythonic way to make them do what I need?
>
>  signature.asc
> 1KDownload




From hancock.robert at gmail.com  Mon Aug 13 18:56:06 2007
From: hancock.robert at gmail.com (milan_sanremo)
Date: Mon, 13 Aug 2007 22:56:06 -0000
Subject: chmod g+ Equivalent
In-Reply-To: <5ic53dF3pi903U1@mid.individual.net>
References: <1187042290.821786.178420@19g2000hsx.googlegroups.com>
	<5ic53dF3pi903U1@mid.individual.net>
Message-ID: <1187045766.841230.148600@b79g2000hse.googlegroups.com>

On Aug 13, 6:42 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> milan_sanremo wrote:
> > I've read the documentation on os.chmod() and can implement all
> > the standard commands, but what is the syntax for the equivalent
> > of chmod g + to set the group id?
>
> Group ID is set using os.chown.
>
> Regards,
>
> Bj?rn
>
> --
> BOFH excuse #190:
>
> Proprietary Information.

The group ownership is set by chown, but the group id (setgid bit) is
set by chmod.



From kyosohma at gmail.com  Fri Aug 17 10:12:15 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 17 Aug 2007 07:12:15 -0700
Subject: best GUI library for vector drawing program
In-Reply-To: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
Message-ID: <1187359935.718745.206790@i38g2000prf.googlegroups.com>

On Aug 17, 8:27 am, chewie54 <dfabrizi... at gmail.com> wrote:
> Hello,
>
> What would be the best cross-platform GUI library to use for a vector
> based CAD program ( something like Visio on Windows )   WxWidgets,
> Tk,   PyQt,  Java Swing,  Java SWT,????   I need the capibility to
> draw and edit in a window that looks like a page of paper so WYSIWYG
> is very important,  and I need to save the drawings in vector based
> file formats like PS, EPS,  SVG, as well as image formats like jpg,
> png, and gif.  Also, the images need to be high resolution so that
> they can be pasted into various other programs in Windows OS,  and
> Linux OS,  and the Mac OS.
>
> Thanks in advance,
> Dan

I think wxPython in conjunction with PIL and/or matplotlib could work.
I'm pretty sure the people on the wxPython user's list have done
vector graphics using those other libraries.

Mike



From mail at microcorp.co.za  Wed Aug 22 03:26:06 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 22 Aug 2007 09:26:06 +0200
Subject: Dispatching default application for file, cross platform.
Message-ID: <01e101c7e48d$e0e9f860$03000080@hendrik>

How do I do the equivalent of clicking (in SuSe) or double clicking (in Windows)
on a file?

In effect I want to tell the OS - take this file and feed it to the application
that is registered for it.

Not too sure what to Google for.

- Hendrik




From daniels at dsl-only.net  Sun Aug 19 19:48:51 2007
From: daniels at dsl-only.net (Scott David Daniels)
Date: Sun, 19 Aug 2007 16:48:51 -0700
Subject: Can I add methods to built in types with classes?
In-Reply-To: <faaj740b8d@news3.newsguy.com>
References: <faaj740b8d@news3.newsguy.com>
Message-ID: <13chlmiq3mq1s12@corp.supernews.com>

CC wrote:
> ... But am still a long way from seeing how I can use this OOP stuff.
> ... I wrote:
> from string import hexdigits
>     def ishex(word):
>         for d in word:
>             if d not in hexdigits: return(False)
>         else return(True)
> Then I can do this to check if a string is safe to pass to the int() 
> function without raising an exception:
>     if ishex(string):
>         value = int(string, 16)

The Pythonic way to do this is simply:
       try:
           value = int(string, 16)
       except ValueError:
           <something else>

> ... Can I create a class which inherits the attributes of the string 
> class, then add a method to it called ishex()? ...
 > The thing is, it doesn't appear that I can get my hands on the base
 > class definition/name for the string type to be able to ....

      class MyStr(str):
          def ishex(self):
              try:
                  value = int(self, 16)
              except ValueError:
                  return False
              return True
# in fact, you could even say
#    class MyStr(type('123')): ...



From evan at yelp.com  Thu Aug  2 19:19:24 2007
From: evan at yelp.com (Evan Klitzke)
Date: Thu, 2 Aug 2007 16:19:24 -0700
Subject: (no) fast boolean evaluation ?
In-Reply-To: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
Message-ID: <cfb58d850708021619s298f69b9p3af86905d1695939@mail.gmail.com>

On 8/2/07, Stef Mientki <S.Mientki-nospam at mailbox.kun.nl> wrote:
> hello,
>
> I discovered that boolean evaluation in Python is done "fast"
> (as soon as the condition is ok, the rest of the expression is ignored).
>
> Is this standard behavior or is there a compiler switch to turn it on/off ?
>

This is standard behavior in every language I've ever encountered. If
you are evaluating an and/or with side effects and you need both side
effects to occur, you can trivially write functions implementing this
behavior, e.g.

def a():
    print 'foo'
def b():
    print 'bar'
def my_and(lh, rh):
    return a and b

Then my_and(a(), b()) will evaluate both a and b and print both foo
and bar even though a() is False.

-- 
Evan Klitzke <evan at yelp.com>


From steve at REMOVE-THIScybersource.com.au  Sun Aug 26 11:53:55 2007
From: steve at REMOVE-THIScybersource.com.au (Steven D'Aprano)
Date: Sun, 26 Aug 2007 15:53:55 -0000
Subject: Need a better understanding on how MRO works?
References: <mailman.295.1188079346.32294.python-list@python.org>
	<1i3evke.1rwf8pn10k1h30N%aleax@mac.com>
	<mailman.0.1188096859.28954.python-list@python.org>
	<1i3f78x.1pxexgx6emjfhN%aleax@mac.com>
	<mailman.5.1188129368.28954.python-list@python.org>
Message-ID: <13d38gjgbcshe4@corp.supernews.com>

On Sun, 26 Aug 2007 07:55:39 -0400, Steven W. Orr wrote:

> In fact, I wanted to make a common routine that could be called from
> multiple modules. I have classes that need to be created from those
> multiple modules. I did run into trouble when I created a common routine
> even though I passed globals() as one of the args.

I'm thinking that you should cross out "even though" and insert 
"because" :-)

Perhaps I'm misunderstanding exactly what you're trying to accomplish, 
but if you want to call a routine (a function? class?) from multiple 
modules, the simplest way is the best: create the routine in one module, 
then import it into all the others.

-- 
Steven.


From altaydniz at yahoo.com  Thu Aug  2 21:24:49 2007
From: altaydniz at yahoo.com (Dennis)
Date: Fri, 03 Aug 2007 01:24:49 -0000
Subject: PYTHON PROGRAMMING HELP PLSSS !!
Message-ID: <f8u051+d7bf@eGroups.com>

HI All,
i am a 4th year business student and i took web design online course
for fun however i did not see that last 2 chapters were python
programming.This has no relevance to my major nor does it have any
contribution to my degree. My fun turned out to be my nightmare since
i literally can not grasp the main idea like other computer science
students. To sum up , i need help with the following code, please do
not send me emails telling me that outside class help is not provided
or etc, this is not my major related course and this might also affect
my graduation date.
This is the working sample program ;
http://cmpt165.cs.sfu.ca/~ggbaker/examples/chequebook.html
If interested please email me, i am ready to make it up for your time
that you spend to get me out of this mess.
thanks



From ptmcg at austin.rr.com  Sat Aug 25 21:05:22 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sat, 25 Aug 2007 18:05:22 -0700
Subject: beginner, idiomatic python
In-Reply-To: <13csoronscqp7d2@corp.supernews.com>
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csoronscqp7d2@corp.supernews.com>
Message-ID: <1188090322.663217.102750@22g2000hsm.googlegroups.com>

On Aug 23, 11:50 pm, "bambam" <da... at asdf.asdf> wrote:
> Thank you, so generallizing:
>
> (1) Python re-evaluates the loop range on every loop, and
> (2) Python does short-circuit evaluation of conditions, in predictable
> order.
>
> Sorry about the bad question.
>

A beginner would do well to work through the Python Tutorial (http://
docs.python.org/tut/tut.html).  I think your first "insight" is
actually incorrect, if I understand your wording.  If I wrote:

for i in range(1000000000):
    # do something with i

I'm quite certain that range(1000000000) is not evaluated on every
loop iteration.  In fact, the range call generates a list containing
the values [0, 1, 2, ..., 999999999], and then for iterates over this
list.  You can read this at http://docs.python.org/tut/node6.html#SECTION006300000000000000000.

On the other hand, if you are talking about a while loop, of course
the condition is evaluated on every loop - otherwise such a loop, once
entered, would never exit.

Your second generalization is stated pretty plainly in
http://docs.python.org/tut/node7.html#SECTION007700000000000000000.
In fact, conditional short-circuiting is a consistent theme in most
Python functions and structures.  The new any() and all() built-ins in
Python 2.5 for example, evaluate a list of values for their boolean
True/False-ness, any() returning True if any list entry is True,
otherwise False; and all() returning True if all entries are True,
otherwise False.  Both short-circuit their evaluation, so that if the
first element of a billion element list gives a True value for any()
(or a False value for all()), then the evaluation of the remaining
billion-1 items is skipped.

Best of luck in your new Python learning process,
-- Paul



From steveo at syslang.net  Fri Aug 24 12:02:40 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Fri, 24 Aug 2007 12:02:40 -0400 (EDT)
Subject: How to replace a method in an instance.
Message-ID: <alpine.LFD.0.999.0708241139080.30194@saturn.syslang.net>

In the program below, I want this instance to end up calling repmeth 
whenever inst.m1 is called. As it is now, I get this error:

Hello from init
inst =  <__main__.CC instance at 0x402105ec>
Traceback (most recent call last):
   File "./foo9.py", line 17, in ?
     inst.m1()
TypeError: repmeth() takes exactly 1 argument (0 given)


#! /usr/bin/python
def repmeth( self ):
     print "repmeth"

class CC:
     def __init__( self ):
         self.m1 = repmeth
         print 'Hello from init'

     def m1 ( self ):
         print "m1"

inst = CC()
inst.m1()

TIA

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From steve at holdenweb.com  Sat Aug 11 15:39:00 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 11 Aug 2007 15:39:00 -0400
Subject: Who told str() to round my int()'s!!!
In-Reply-To: <9qmvi.47364$s5.1537219@phobos.telenet-ops.be>
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
	<9qmvi.47364$s5.1537219@phobos.telenet-ops.be>
Message-ID: <f9l38l$fsa$1@sea.gmane.org>

Roel Schroeven wrote:
> Adam W. schreef:
>> After a fair amount of troubleshooting of why my lists were coming
>> back a handful of digits short, and the last digit rounded off, I
>> determined the str() function was to blame:
>>
>>>>> foonum
>> 0.0071299720384678782
>>>>> str(foonum)
>> '0.00712997203847'
>>
>> Why in the world does str() have any business rounding my numbers, and
>> how do I get around this?
> 
> You could use repr() instead of str() (AFAIK that's what the interactive 
> interpreter used to print your foonum), but in any case you should be 
> aware of the limits inherent in floating point arithmetic and in 
> conversions between decimal and binary fractions. See e.g. 
> http://docs.python.org/tut/node16.html
> 
> 
I should also point out that the subject line for this thread is 
inaccurate, as it wasn't rounding ints at all.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From Dominic at PLEASEASK.co.uk  Thu Aug  9 08:12:13 2007
From: Dominic at PLEASEASK.co.uk (special_dragonfly)
Date: Thu, 9 Aug 2007 13:12:13 +0100
Subject: Help with Dictionaries and Classes requested please.
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
	<46baf183$0$433$426a74cc@news.free.fr>
	<46baf384$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <46bb00d4$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>


"special_dragonfly" <Dominic at PLEASEASK.co.uk> wrote in message 
news:46baf384$0$11943$7b0f0fd3 at mistral.news.newnet.co.uk...
>
> "Bruno Desthuilliers" <bruno.42.desthuilliers at wtf.websiteburo.oops.com> 
> wrote in message news:46baf183$0$433$426a74cc at news.free.fr...
>> special_dragonfly a ?crit :
>> (snip)
>>> I've managed to solve the problem, I really was just being a dunce. 
>>> Here's how incase anyone is wondering:
>>>
>>> class MyClass:
>>>     def __init__(self):
>>>         name=""
>>> dict={}
>>> dict[0]=[]
>>> dict[0].append(MyClass())
>>> dict[0][0].name="Hello"
>>> print dict[0][0].name
>>>
>>> I'm sorry if I've wasted anyones time, although if there's a better way 
>>> of doing the above I'd still be interested to know.
>>
>> # unless you need pre 2.3.x compat, better to use newstyle classes
>> class MyClass(object):
>>   # use the initializer to initialize your instance
>>   def __init__(self, name=''):
>>     # the use of 'self' is mandatory, else you only have a local var
>>     self.name = name
>>
>> # don't use builtin names as identifiers - unless you really want to
>> # shadow the builtins
>> d = {0:[MyClass('hello')}
>> d[0].append(MyClass('goodbye'))
>> d.setdefault(1, []).append(MyClass('Yo'))
>> print d
>>
>> HTH
>


Is there anyway for python to consider the values within a string when 
entering the data into a dictionary. I know that isn't very clear so here's 
an example:

class MyClass(object):
    def __init__(self,name="",age=""):
        self.name=name
        self.age=age

data="Gary,50"
d={0:[MyClass(data)]}
data="Adam,25"
d[0].append(MyClass(data))

The data is coming from a text file working on a line by line basis. I've 
just tried and I'm just getting the full string in the first field. That 
seems logical, now I don't want it to though!

Dominic






From jr244 at kent.ac.uk  Fri Aug 17 10:22:06 2007
From: jr244 at kent.ac.uk (J. Robertson)
Date: Fri, 17 Aug 2007 15:22:06 +0100
Subject: Need to generate some functions.
In-Reply-To: <mailman.2110.1187358015.22759.python-list@python.org>
References: <mailman.2110.1187358015.22759.python-list@python.org>
Message-ID: <fa4aue$r2e$1@oheron.kent.ac.uk>

you can use the dictionary returned by the built in function vars, along 
the lines of

 >>> vars()["foo"] = lambda x: 3*x
 >>> foo(2)
6

but polluting your name space with data counts as bad style and will 
probably bite you at some point -- you probably are better of putting 
closures in a dictionary:

 >>> def mkdict(address):
	def something():
		return {'Address': address, 'Control': "SOME_CONST"}
	return something
 >>> mk = {}
 >>> mk["n1"] = mkdict("n1")
 >>> mk["n1"]()
{'Control': 'SOME_CONST', 'Address': 'n1'}




Steven W. Orr wrote:
> Given a list of names
> 
> ll = ("n1", "n2", "n3", "n4")
> 
> I want to create a pair of functions based off of each name. An example 
> of what I want to happen would look like this:
> 
> def mkn1dict(address):
>     return {'Address': address, 'Control': SOME_CONST}
> 
> def mkn1Classobj(address):
>     return Classobj( mkn1classobj(address) )
> 
> I know how to do this in a preprocessor, but I'd like to do it directly 
> in python. Can this be done?
> 
> TIA
> 
> 


From pavlovevidence at gmail.com  Mon Aug 20 02:04:35 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Mon, 20 Aug 2007 06:04:35 -0000
Subject: Python question (PyNoob)
In-Reply-To: <1187576287.194843.266600@q3g2000prf.googlegroups.com>
References: <3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d@bt.com>
	<1187576287.194843.266600@q3g2000prf.googlegroups.com>
Message-ID: <1187589875.616337.195060@x35g2000prf.googlegroups.com>

On Aug 19, 10:18 pm, Benjamin <musiccomposit... at gmail.com> wrote:
> On Aug 19, 7:33 pm, Anonymous <no.re... at here.com> wrote:
>
> > I have exp with C/C++ (and a few other langs). I want to use Python to
> > start doing the ff:
>
> > 1). Data Munging (text processing) - instead of Perl
> > 2). Automating my build process
> > 3). (Possibly) some web data retrieval jobs
>
> > Can anyone point me to resurces/possibly scripts that can get me up to
> > speed (to do these 3 things) ASAP, without having to learn the basics of
> > programming?
>
> I think if you've chosen Python as a language to use for these things,
> you could invest some time in learning the language. It is after all
> very easy to learn and you just have to do it once and many of your
> programming task will be taken care of.


I think you and several others are misunderstanding the OP: the OP
wants to learn some details of Python without having to *relearn* the
basics of programming.  It's a reasonable request.


Carl Banks



From tundra at tundraware.com  Fri Aug 31 13:53:13 2007
From: tundra at tundraware.com (Tim Daneliuk)
Date: Fri, 31 Aug 2007 12:53:13 -0500
Subject: So what exactly is a complex number?
In-Reply-To: <mailman.212.1188576194.28954.python-list@python.org>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
Message-ID: <451mq4-les.ln1@ozzie.tundraware.com>

Carsten Haese wrote:
> On Thu, 2007-08-30 at 20:11 -0500, Lamonte Harris wrote:
>> Like in math where you put letters that represent numbers for place
>> holders to try to find the answer type complex numbers?
> 
> Is English your native language? I'm having a hard time decoding your
> question.
> 

Here is a simple explanation (and it is not complete by a long shot).

A number by itself is called a "scalar".  For example, when I say,
"I have 23 apples", the "23" is a scalar that just represents an
amount in this case.

One of the most common uses for Complex Numbers is in what are
called "vectors".  In a vector, you have both an amount and
a *direction*.  For example, I can say, "I threw 23 apples in the air
at a 45 degree angle".  Complex Numbers let us encode both
the magnitude (23) and the direction (45 degrees) as a "number".

There are actually two ways to represent Complex Numbers.
One is called the "rectangular" form, the other the "polar"
form, but both do the same thing - they encode a vector.

Complex Numbers show up all over the place in engineering and
science problems.  Languages like Python that have Complex Numbers
as a first class data type allow you do to *arithmetic* on them
(add, subtract, etc.).  This makes Python very useful when solving
problems for engineering, science, navigation, and so forth.


HTH,
-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From paul.sijben at xs4all.nl  Tue Aug 21 10:01:46 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Tue, 21 Aug 2007 16:01:46 +0200
Subject: python 2.5.1 segfault, multithreading & dual core issue?
Message-ID: <46caf049$0$239$e4fe514c@news.xs4all.nl>

I am running a multi-threaded python application in a dual core intel
running Ubuntu.

I am using python 2.5.1 that I compiled myself. At random points I am
getting segmentation faults (sometimes indicating a duplicate free).
Below is the backtrace of the latest segfault.

I am thinking this might be an issue related to the dual core CPU so I
am now running the app with affinity to one CPU to test this hypothesis.

Where can I put such a bugreport?

----

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1486967920 (LWP 4579)]
0x009196ed in fclose@@GLIBC_2.1 () from /lib/libc.so.6
(gdb) bt
#0  0x009196ed in fclose@@GLIBC_2.1 () from /lib/libc.so.6
#1  0x0806af9b in file_close (f=0xa259e30) at Objects/fileobject.c:446
#2  0x080c51b0 in PyEval_EvalFrameEx (f=0xa3c790c, throwflag=0) at
Python/ceval.c:3548
#3  0x080c5795 in PyEval_EvalFrameEx (f=0xa3c77a4, throwflag=0) at
Python/ceval.c:3650
#4  0x080c5795 in PyEval_EvalFrameEx (f=0xa3afccc, throwflag=0) at
Python/ceval.c:3650
#5  0x080c5795 in PyEval_EvalFrameEx (f=0xa3c8804, throwflag=0) at
Python/ceval.c:3650
#6  0x080c65a5 in PyEval_EvalCodeEx (co=0xb7f315c0, globals=0xb7f29824,
locals=0x0, args=0xa39b9a8, argcount=3,
    kws=0xa39b9b4, kwcount=0, defs=0xb7c8fb98, defcount=1, closure=0x0)
at Python/ceval.c:2831
#7  0x080c4a59 in PyEval_EvalFrameEx (f=0xa39b864, throwflag=0) at
Python/ceval.c:3660
#8  0x080c65a5 in PyEval_EvalCodeEx (co=0xb7f2ec38, globals=0xb7f29824,
locals=0x0, args=0xa399920, argcount=3,
    kws=0xa39992c, kwcount=0, defs=0xb7c8fad8, defcount=1, closure=0x0)
at Python/ceval.c:2831
#9  0x080c4a59 in PyEval_EvalFrameEx (f=0xa3997c4, throwflag=0) at
Python/ceval.c:3660
#10 0x080c65a5 in PyEval_EvalCodeEx (co=0xb7f2eda0, globals=0xb7f29824,
locals=0x0, args=0xa340e30, argcount=3,
    kws=0xa340e3c, kwcount=0, defs=0xb7cea330, defcount=4, closure=0x0)
at Python/ceval.c:2831
#11 0x080c4a59 in PyEval_EvalFrameEx (f=0xa340cb4, throwflag=0) at
Python/ceval.c:3660
#12 0x080c65a5 in PyEval_EvalCodeEx (co=0xb7f317b8, globals=0xb7f29824,
locals=0x0, args=0xa39cedc, argcount=2,
    kws=0xa39cee4, kwcount=2, defs=0xb7c905b0, defcount=3, closure=0x0)
at Python/ceval.c:2831
#13 0x080c4a59 in PyEval_EvalFrameEx (f=0xa39cd7c, throwflag=0) at
Python/ceval.c:3660
#14 0x080c65a5 in PyEval_EvalCodeEx (co=0xb7f316e0, globals=0xb7f29824,
locals=0x0, args=0xa3aff8c, argcount=4,
    kws=0xa3aff9c, kwcount=1, defs=0xb7c8fbb8, defcount=2, closure=0x0)
at Python/ceval.c:2831
#15 0x080c4a59 in PyEval_EvalFrameEx (f=0xa3afe34, throwflag=0) at
Python/ceval.c:3660
#16 0x080c65a5 in PyEval_EvalCodeEx (co=0xb7f07728, globals=0xb7f59acc,
locals=0x0, args=0xa32b9ac, argcount=3,
    kws=0xa32b9b8, kwcount=0, defs=0xb7c0a1f8, defcount=2, closure=0x0)
at Python/ceval.c:2831
#17 0x080c4a59 in PyEval_EvalFrameEx (f=0xa32b86c, throwflag=0) at
Python/ceval.c:3660
#18 0x080c5795 in PyEval_EvalFrameEx (f=0xa3c84f4, throwflag=0) at
Python/ceval.c:3650
#19 0x080c5795 in PyEval_EvalFrameEx (f=0xa3a4ef4, throwflag=0) at
Python/ceval.c:3650
#20 0x080c65a5 in PyEval_EvalCodeEx (co=0xb7f1d1d0, globals=0xb7f11dfc,
locals=0x0, args=0xa2d8cd8, argcount=1,
    kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at
Python/ceval.c:2831
#21 0x0810d6a1 in function_call (func=0xb7f26e2c, arg=0xa2d8ccc, kw=0x0)
at Objects/funcobject.c:517
#22 0x0805a257 in PyObject_Call (func=0xa48ff4, arg=0xa2d8ccc, kw=0x0)
at Objects/abstract.c:1860
#23 0x08060387 in instancemethod_call (func=0xa23b2fc, arg=0xa2d8ccc,
kw=0x0) at Objects/classobject.c:2497
#24 0x0805a257 in PyObject_Call (func=0xa48ff4, arg=0xb7f4102c, kw=0x0)
at Objects/abstract.c:1860
#25 0x080be79c in PyEval_CallObjectWithKeywords (func=0xa23b2fc,
arg=0xb7f4102c, kw=0x0) at Python/ceval.c:3433
#26 0x080f01b8 in t_bootstrap (boot_raw=0xa3c8048) at
./Modules/threadmodule.c:424
#27 0x00a3a45b in start_thread () from /lib/libpthread.so.0
#28 0x0099223e in clone () from /lib/libc.so.6


From thorsten at thorstenkampe.de  Wed Aug 22 12:48:42 2007
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Wed, 22 Aug 2007 17:48:42 +0100
Subject: Python is removing my quotes!
References: <496954360708210900p6da42670o3a28d6b0dbd4c524@mail.gmail.com>
	<mailman.70.1187712597.32294.python-list@python.org>
Message-ID: <MPG.21367942bf3cedfe98970d@news.individual.de>

* Gary Herron (Tue, 21 Aug 2007 09:09:13 -0700)
> Robert Dailey wrote:
> > Note: I'm using Python on Windows
> >
> > I have an application that allows a user to submit a password as a
> > command line parameter. The password of choice may contain any
> > characters the user wishes, including quotes. If I do the following:
> >
> > python password.py "9999"MyPassword
> >
> > The resulting output when I print this inside the script is:
> >
> > 9999MyPassword
> >
> > Notice how the quotations have been stripped. Is it DOS doing this, or
> > Python? Is there a way I can fix it?
> 
> Not Python.  It never even sees those quotes.  Whatever system you are
> using for entering the text is stripping them.  Is it the command prompt
> (cmd.exe)?  If so then you can escape the quote by preceding it with a
> backslash.  (This is true of the DOS prompt [...]

No, under Cmd it's "^".


From email at christoph-haas.de  Thu Aug  2 16:32:25 2007
From: email at christoph-haas.de (Christoph Haas)
Date: Thu, 2 Aug 2007 22:32:25 +0200
Subject: Berkely Db. How to iterate over large number of keys "quickly"
In-Reply-To: <1186083838.318952.254370@q3g2000prf.googlegroups.com>
References: <1186083838.318952.254370@q3g2000prf.googlegroups.com>
Message-ID: <20070802203225.GD26145@torf.workaround.org>

On Thu, Aug 02, 2007 at 07:43:58PM -0000, lazy wrote:
> I have a berkely db and Im using the bsddb module to access it. The Db
> is quite huge (anywhere from 2-30GB). I want to iterate over the keys
> serially.
> I tried using something basic like
> 
> for key in db.keys()
> 
> but this takes lot of time. I guess Python is trying to get the list
> of all keys first and probbaly keep it in memory. Is there a way to
> avoid this, since I just want to access keys serially.

Does db.iterkeys() work better?

 Christoph



From QJing.Li at gmail.com  Sun Aug 19 14:34:48 2007
From: QJing.Li at gmail.com (math2life)
Date: Sun, 19 Aug 2007 18:34:48 -0000
Subject: Hot subject: a good python editor and/or IDE?
In-Reply-To: <mailman.2162.1187525764.22759.python-list@python.org>
References: <mailman.2162.1187525764.22759.python-list@python.org>
Message-ID: <1187548488.690813.276250@q4g2000prc.googlegroups.com>

On Aug 19, 2:47 am, S?bastien <seb.buch... at gmail.com> wrote:
> Hi folks,
>
> I am currently using Eclipse+PyDev when developping Python projects but
> I lack a fast, simple editor for tiny bit of scripts. So here is my
> question: what is, for you, the current best ( but still kind of light!
> ) Python editor/IDE ? A tiny precision, I am on Ubuntu so I am looking
> for a linux compatible editor.
>
> Cheers,
>
> S?bastien

I use SPE which is simple.



From google at mrabarnett.plus.com  Sat Aug 25 16:10:30 2007
From: google at mrabarnett.plus.com (MRAB)
Date: Sat, 25 Aug 2007 13:10:30 -0700
Subject: question
In-Reply-To: <mailman.273.1187979676.32294.python-list@python.org>
References: <mailman.273.1187979676.32294.python-list@python.org>
Message-ID: <1188072630.494110.290250@22g2000hsm.googlegroups.com>

On Aug 24, 7:20 pm, JYOUN... at kc.rr.com wrote:
> Still trying to learn Python and was hoping some of you might be able to give me some advice
> on my code
> below.  It works but I'm wondering if there's more efficient ways of doing this than the way
> I've done it.
>
> The first step is I have to loop thru nested folders and find all files that start with "LOGO".  So
> I use Unix's 'find'
> and write all the paths out to a text file like so:
>
> find ~/Desktop/logoFiles/ -type f -iname "LOGO*" > ~/Desktop/logo_stuff/paths.txt"
>
> Next, I use Python (code below) to look thru each paragraph of that file (paths.txt).  While
> looping thru each
> paragraph, I want to first make sure that the folder name that the file is in is a number.  For
> example, if it found
> file 'LOGO9012', then I'd want to make sure the folder name that this file was in was a
> number (~/Desktop/
> logoFiles/12/LOGO9012).  If that's ok then I grab the number off the file name.  If there's not
> a number in the
> file name then I ignore it.  I then create a dictionary that has a key which equals the number I
> grabbed from the
> file name and then the value contains the full file path (that I grabbed out of the text file)
> followed by a
> delimiter (<::>) followed by 'LOGO' and the number I got from the file name (making sure to
> keep any leading
> zeroes if they were there originally).  Finally, I sort the keys in numerical order and save out a
> file with all the
> appropriate info from my dictionary (which will be a list of paths followed by a delimiter and
> file name).  Here's
> an example of what this new file might contain:
>
> /Users/jyoung1/Desktop/logoFiles/02/Logo002<::>LOGO002
> /Users/jyoung1/Desktop/logoFiles/02/LOGO102<::>LOGO102
> /Users/jyoung1/Desktop/logoFiles/02/LOGO302<::>LOGO302
> /Users/jyoung1/Desktop/logoFiles/9/LOGO462.2PMS<::>LOGO462
>
> Anyway, if anyone has time to look at this I'd appreciate your thoughts.  Thanks!
>
> Jay
>
> #!/usr/bin/python
>
> import re
>
> dList = {}
> sortedList = ""
>
> pathFile = open("~/Desktop/logo_stuff/paths.txt", "r")
>
> for x in pathFile:
>   if len(re.findall(r"^\d+$", x.split("/")[-2])) > 0:  #make sure folder name is a number
>     n = re.findall(r"\d+", x.split("/")[-1])   #Grab number off file name
>     if len(n) > 0: dList[int(n[0])] = x[:-1] + "<::>LOGO" + n[0] + "\n"
>
> pathFile.close()
>
> keyList = dList.keys()
> keyList.sort()
>
> for x in keyList:
>   sortedList += dList[x]
>
> newFile = open("~/Desktop/logo_stuff/sortedPaths.txt", "w")
> newFile.write(sortedList)
> newFile.close()
>
Here's my attempt:

#!/usr/bin/python

import os
import re

# Search for the files

folder = "~/Desktop/logoFiles/"

pathList = []

for name in os.listdir(folder):
    path = os.path.join(folder, name)
    # If you want it to be case-insensitive then use
name.upper().startswith("LOGO")
    if os.path.isfile(path) and name.startswith("LOGO"):
        pathList.append(path)

dList = {}

for x in pathList:
    parts = x.split("/")
    if parts[-2].isdigit():  # Make sure folder name is a number
        n = re.findall(r"(\d+)$", parts[-1])   # Grab number off file
name
        if n:
            dList[int(n[0])] = "%s<::>LOGO%s\n" % (x, n[0])

keyList = dList.keys()
keyList.sort()

sortedList = "".join(dList[x] for x in keyList)

newFile = open("~/Desktop/logo_stuff/sortedPaths.txt", "w")
newFile.write(sortedList)
newFile.close()



From max at alcyone.com  Fri Aug 31 03:47:36 2007
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 31 Aug 2007 00:47:36 -0700
Subject: list index()
In-Reply-To: <mailman.188.1188546300.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com><46d674c2$0$417$426a34cc@news.free.fr><1188496588.750629.208100@g4g2000hsf.googlegroups.com>	<1188497498.3468.60.camel@dot.uniqsys.com>
	<mailman.188.1188546300.28954.python-list@python.org>
Message-ID: <0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>

Hendrik van Rooyen wrote:

> weird this - maybe a native English speaker can comment - 
> when I pronounce what fishermen do - it rhymes with roll,
> but when I am talking about the thing that lives under bridges
> and munches goats, the "O" sound is shorter, and more 
> towards the back of my mouth.

Native English accents vary as well, but _roll_ rhymes with _troll_, not 
_trawl_.  _Trawl_ would rhyme with _fall_, and _fall_ definitely doesn't 
rhyme with _roll_.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   I do not like work even when someone else does it.
    -- Mark Twain


From alisonken1 at gmail.com  Wed Aug 15 15:10:19 2007
From: alisonken1 at gmail.com (alisonken1)
Date: Wed, 15 Aug 2007 19:10:19 -0000
Subject: Layer 2 socket connection
In-Reply-To: <46c34e74$0$24979$9b622d9e@news.freenet.de>
References: <1187202110.958564.206770@l22g2000prc.googlegroups.com>
	<46c34e74$0$24979$9b622d9e@news.freenet.de>
Message-ID: <1187205019.080385.143200@z24g2000prh.googlegroups.com>

On Aug 15, 12:05 pm, "Martin v. L?wis"
<snip>
> If your operating system supports the PF_PACKET protocol family, you
> can try to use that. Python only wraps the socket interface of the
> operating system, so if the system's socket implementation has no
> facility for that, Python cannot expose it to you, either.
>
> Regards,
> Martin

I take it this means "Non-Unix variants" may have problems :)

Thanks, Martin. I'll have a look at that.

I'm working on a Linux platform, but there may be a need later on to
work with an MS platform as well (something for the boss).



From jstroud at mbi.ucla.edu  Mon Aug 20 00:30:23 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 19 Aug 2007 21:30:23 -0700
Subject: How do I call anonymous classes from imported modules?
In-Reply-To: <mailman.2182.1187582709.22759.python-list@python.org>
References: <mailman.2179.1187578824.22759.python-list@python.org>	<fab13k$9tn$1@zinnia.noc.ucla.edu>
	<mailman.2182.1187582709.22759.python-list@python.org>
Message-ID: <8I8yi.6116$924.1335@newssvr23.news.prodigy.net>

JoeSox wrote:
> On 8/19/07, James Stroud <jstroud at mbi.ucla.edu> wrote:
>> Quick and dirty (you could also use a try: except:):
>>
>> f = __import__(module_name)
>> for anobj in f.__dict__.values():
>>   if hasattr(anobj, 'do_foobar'):
>>     anobj.do_foobar()
>>
>> Note that this does not test whether anobj is a class as this would
>> entail a type-check, which hints to poor design.
> 
> Thanks for the help.  The __dict__.values() is something I have not
> previously looked into but it does not work as desired because python
> wants an instance of the class.  How can I cast an object if I don't
> know what type of object it is (example.ticker, in this debug)?
> 
>>>> modname = sensorsList[0].__name__
>>>> m = __import__(modname)
>>>> for anobj in m.__dict__.values():
> 	if hasattr(anobj, 'do_foobar'):
> 		anobj.do_foobar()
> 
> 		
> Traceback (most recent call last):
>   File "<pyshell#76>", line 3, in ?
>     anobj.do_foobar()
> TypeError: unbound method do_foobar() must be called with ticker
> instance as first argument (got nothing instead)

This was the poor design I was hinting to. do_foobar is type-checking 
for ticker. "Casting" as you might think of it does not exist in python. 
Creating new objects based on the values of existing objects (lets call 
it "conversion" for lack of a better name) does (e.g. int(2.0)). But 
this is not casting. Unless you have the power to re-author all of the 
do_foobar()s to not type-check, you should create an instance of ticker 
and pass that:

t = ticker(param1, param2, parametc)
[...]
               anobj.do_foobar(t)

The "got nothing instead" means that you should have passed an 
argument--and unfortunately whoever authored do_foobar() type-checked 
for a ticker, which is not a desirable way to design an API.

James


From nospam.themindstorm at gmail.com  Mon Aug  6 07:13:45 2007
From: nospam.themindstorm at gmail.com (Alex Popescu)
Date: Mon, 6 Aug 2007 11:13:45 +0000 (UTC)
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<46b6df49$0$26165$9b622d9e@news.freenet.de>
Message-ID: <Xns998490670129Athemindstorm@80.91.229.5>

Stargaming <stargaming at gmail.com> wrote in news:46b6df49$0$26165
$9b622d9e at news.freenet.de:

> On Sun, 05 Aug 2007 23:50:24 -0700, Lee Fleming wrote:
> 
>> Hello,
>> I have a simple question. Say you have the following function:
>> 
>> def f(x, y = []):
>>     y.append(x)
>>     return y
>> 
>> print f(23)  # prints [23]
>> print f(42)  # prints [23, 42]
>> 
>> As far as I understand, the default value y, an empty list, is 
created
>> when the def statement evaluates. With this thought in mind, the 
above
>> calls
>> to f make sense.
>> 
>> But this, the code that "fixes" the list accumulation confounds me: 
def 
>> f(x, y=None):
>>     if y is None: y = []
>>     y.append(x)
>>     return y
>> 
>> print f(23)  # prints [23]
>> print f(42)  # prints [42]
>> 
>> Why didn't the second call to f, f(42) return [23, 42]? As I 
understand
>> it, y is only None at the beginning of f(23). Then y changes from 
None
>> to 23. When f ends, doesn't y still have 23 in it,
>> just as it did in the first function I discussed? And if y has 23 in 
it,
>> won't the second call to f not execute what's in the if statement?
>> 
>> In other words, what's going on here? How is it that y accumulates
>> argument values between function calls in the first function, but
>> doesn't in the second one?
> 
> You're just unluckily shadowing the name `y` in the local scope of 
your 
> function. Your code snippet could be rewritten as::
> 
>   def f(x, y=None):
>     if y is None: my_y = []
>     else: my_y = y
>     my_y.append(x)
>     return my_y
> 
> HTH,
> Stargaming

For the given example this will continue to print:

> print f(23)  # prints [23]
> print f(42)  # prints [42]

so this doesn't solve/explain OP's initial question. A previous post has 
already clarified the reasons for seeing this normal behavior.

bests,
./alex
--
.w( the_mindstorm )p.



From __peter__ at web.de  Sun Aug 12 14:06:23 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 12 Aug 2007 20:06:23 +0200
Subject: who is simpler? try/except/else or try/except
References: <46bf4074$0$10626$4fafbaef@reader2.news.tin.it>
Message-ID: <f9ni70$uhr$00$1@news.t-online.com>

Fabio Z Tessitore wrote:

> reading Dive Into Python, on Chapter 6 (exception), I've found:
> 
> "This code comes from the getpass module, a wrapper module for getting a 
> password from the user"

> ????????????????try:
> ????????????????????????from EasyDialogs import AskPassword
> ????????????????except ImportError:
> ????????????????????????getpass = default_getpass
> ????????????????else:
> ????????????????????????getpass = AskPassword

> Knowing that this code is very simple, my question is about simplicity. I 
> think it is simpler the following code. I haven't a long experience on 
> Python, so I'd like to know your opinions about.

> 
> ????????????????try:
> ????????????????????????from EasyDialogs import AskPassword
> ????????????????????????getpass = AskPassword
> ????????????????except ImportError:
> ????????????????????????getpass = default_getpass

I think you are asking the wrong question.  The difference between these two
functionally equivalent snippets is in expressiveness rather than
simplicity.

The first can be read as

try:
    <operation that may fail>
except <Error I can handle>:
   <fix it>
else:
    <build on successful operation>

When you move the else suite into the try...except

try:
    <operation that may fail>
    <build on successful operation> #
except <Error I can handle>:
   <fix it>

you blur the difference between <operation that may fail> and <build on
successful operation> while at the same time introducing the implicit
constraint that the latter does not fail with <Error I can handle>. 
Therefore the original code gives the reader a much clearer notion of the
author's intention.  This may not be a problem for the simple code at hand
but is definitely a bad habit to get into. 

Peter



From rdm at rcblue.com  Thu Aug  9 15:40:57 2007
From: rdm at rcblue.com (Dick Moores)
Date: Thu, 09 Aug 2007 12:40:57 -0700
Subject: Puzzled by "is"
Message-ID: <20070809194105.39BD11E400A@bag.python.org>

At 10:46 AM 8/9/2007, Bill Scherer wrote:
>Dick Moores wrote:
> >  >>> () is ()
> > True
> >  >>> (1,) is (1,)
> > False
> >
> > Why?
> >
>
> >>> a = ()
> >>> b = ()
> >>> c = (1,)
> >>> d = (1,)
> >>> a is b
>True
> >>> c is d
>False
> >>> id(a)
>3086553132
> >>> id(b)
>3086553132
> >>> id(c)
>3086411340
> >>> id(d)
>3086390892
>
>
>There is only one empty tuple.
>Does that clear it up for you?

But isn't that the same as saying, "That's just the reality of 
Python; it is what it is."? I want to know why there is only one 
empty tuple, but more than one (1,).

Also,
 >>> [] is []
False

Dick  



From aleax at mac.com  Sat Aug 11 20:23:02 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 11 Aug 2007 17:23:02 -0700
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
	<46B8626A.2070303@bigfoot.com>
	<mailman.1726.1186537161.22759.python-list@python.org>
	<5hsoi3F3mlni2U1@mid.individual.net> <f9ceb9$jsm$1@sea.gmane.org>
	<1186581124.3383.55.camel@dot.uniqsys.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
	<slrnfbk19k.20o.horpner@FIAD06.norwich.edu>
	<1i2nhxn.tme05x17r39odN%aleax@mac.com>
	<m3hvi.37606$G23.6240@newsreading01.news.tds.net>
	<EAqvi.37622$G23.4722@newsreading01.news.tds.net>
Message-ID: <1i2oxyo.cprrpi3nqji1N%aleax@mac.com>

Neil Cerutti <horpner at yahoo.com> wrote:
   ...
> OK, I've thought about this some more and I think the source of
> my confusion was I thought assignment in Python meant binding a
> name to something, not mutating an object. But in the case of
> augmented assignment, assignment no longer means that?

"Plain" assignment *to a plain name* does mean "binding a name" (the
LHS) to "something" (the RHS).

Other assignments (ones that are not "plain" assignments to names) may
have different meanings.  For example:

>>> class act(object):
...   def __init__(self, c): self._c = c
...   def getC(self): return self._c
...   def setC(self, *ignore): self._c += 1
...   c = property(getC, setC)
...   
>>> x = act(0)
>>> x.c
0
>>> x.c = 23
>>> x.c
1
>>> 

Here's an example where a plain assignment (to an attribute of x, not to
a plain name) obviously DOESN'T mean "binding a name to something": the
"something" (the RHS) is completely ignored, so the plain assignment is
mutating an object (x) and not binding any name to anything.

Plain assignments to items and slices can also often be best seen as
"mutating an object" (the one being indexed or sliced on the LHS) rather
than "binding a name".  For example:

>>> l=list('ciao')
>>> l[1:3]='app'
>>> l
['c', 'a', 'p', 'p', 'o']

If I was teaching Python and came upon this example, I would definitely
not try to weaselword the explanation of what's going on in terms of
"binding a name" (or several ``names'', including ``rebinding" a new
``name'' l[4] to the 'o' that was previously ``bound'' to l[3], etc:-):
it's just orders of magnitudes simpler to explain this as "mutating an
object", namely the list l.

I take almost 3 pages in "Python in a Nutshell" (47 to 49 in the second
edition) to summarily explain every kind assignment -- and that's in a
work in which I've tried (successfully, I believe from reviews) to be
very, *VERY* concise;-).

Summarizing that summary;-), a plain assignment to an identifier binds
that name; a plain assignment to an attribute reference x.y asks object
x (x can be any expression) to bind its attribute named 'y'; a plain
assignment to an indexing x[y] (x and y are arbitrary expressions) asks
object x to bind its item indicated by the value of y); a plain
assignment to a slicing is equivalent to the plain assignment to the
indexing with an index of slice(start, stop, stride) [[slice is a Python
builtin type]].

Plain assignment to an identifier "just happens"; all other cases of
plain assignment are requests to an object to bind one or more of its
attributes or items (i.e., requests for specific mutations of an object)
-- as for, say any method call (which might also be a request for some
kind of mutation), the object will do whatever it pleases with the
request (including, perhaps, "refusing" it, by raising an exception).

Then we get into unpacking assignments and augmented assignments, but I
don't really want to write two more pages worth of summary...;-).


Alex


From daniels at dsl-only.net  Thu Aug 30 00:26:32 2007
From: daniels at dsl-only.net (Scott David Daniels)
Date: Wed, 29 Aug 2007 21:26:32 -0700
Subject: self extracting zipefile (windows) and (standard module) zipefile
In-Reply-To: <13db09i6rrnjc22@corp.supernews.com>
References: <1188388421.010643.19050@50g2000hsm.googlegroups.com>
	<1188393907.080206.246270@y42g2000hsy.googlegroups.com>
	<13db09i6rrnjc22@corp.supernews.com>
Message-ID: <13dchmplshc2uff@corp.supernews.com>

Grant Edwards wrote:
...
> Another option is to search through the file from the beginning
> looking for whatever signature matches the beginning of a
> "normal" zip file.  The self-extracting zipfiles that I've
> dissected are just an executable image concatenated with a
> "normal" zipfile.  If you just start searching from the
> beginning of the file, it's simple to find the actual zip data
> and copy it into a separate file which then can be unzipped
> like any other plain zipfile.

Actually, the zip format is defined from the _end_ rather than
the _beginning_ of the file.  Some random file with a zip file
concatenated on the end will have the same contents as the zip
file.  You can even point Python itself at such files and get
data via:
     import zipfile
     zf = zipfile.ZipFile('something.exe')
     ...

-Scott David Daniels
Scott.Daniels at Acm.Org


From arkanes at gmail.com  Mon Aug  6 13:43:08 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 6 Aug 2007 12:43:08 -0500
Subject: Tkinter or wxpython?
In-Reply-To: <7x3aywr4tc.fsf@ruckus.brouhaha.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
	<mailman.1680.1186416061.22759.python-list@python.org>
	<7x3aywr4tc.fsf@ruckus.brouhaha.com>
Message-ID: <4866bea60708061043x34fb94edg8b675eb1608af9b1@mail.gmail.com>

On 06 Aug 2007 09:44:15 -0700, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> "Chris Mellon" <arkanes at gmail.com> writes:
> > > Might or might not matter for the application, especially considering
> > > that tkinter is part of the discussion.
> > The point is that you have no option with the browser - even Tkinter
> > has platform theming support now.
>
> Hmm, I don't know anything about that.  I'm taking the view that for a
> lot of apps, the requirement is to just put some functionality on the
> screen, with slick visual appearance having little value or even
> negative value.
>

Define "functionality". From the rest of your posts, that seems to be
limited to "press buttons" and "type small amounts of non-formatted
text" on the interaction side and "display small amounts of simply
formatted text" on the output side. I'm not denying that you can get
by with this functionality in a large number of cases, but it's
certainly not optimal in general. If it were, we'd all still be using
VT100 terminals.

> > ...Gmail uses ajax instead of a page load when you start
> > typing a reply,
>
> I see, the answer to what caused your problem is approximately "ajax
> is evil", or alternatively, the gmail app attempts slickness with a
> tool that doesn't support slickness that well.  OK, I can accept that
> using browsers for slick interfaces has its problems, but the answer
> (a lot of the time, not always) is to just decide you don't need
> slickness.
>

What you're calling "slickness" is what other people call "usable".
Obviously it could be done without the ajax, but you lose features and
usability. It's slower, because it takes a full page load, and I lose
the context of the discussion.

> > > File i/o and file system browsing are available from javascript if the
> > > user grants permission.
> > Which they won't (I don't even know how, from Firefox), so you can't
> > rely on it working.
>
> The application javascript pops a dialog asking for permission and the
> user clicks yes or no.  If you can get them to install a desktop app
> (gah!!) then you can certainly get them to click yes in a browser.
> The permission mechanism is admittedly browser dependent.
>

My out of the box firefox install simply denies the operation and
raises a javascript error.

> > But not of anything else. I've often wanted to drag & drop a file onto
> > the file upload box in gmail, for example.
>
> Well, ok, that's a slick feature that your app might need.  None of
> mine have needed it so far.
>
> > How about something as simple as context menus?
>
> Unnecessary slickness for many apps.  I've never needed it.
>

How have you decided that you've never needed it? Have you ever worked
with a UI designer or workflow expert? Or have you just never bothered
to implement it and you never heard anything from your users? How
closely have you worked with the users of your applications?

> > > Multiple windows are evil most of the time,
> > Multiple windows are the common case on the mac. They're not rare on
> > other platforms as well. The fact that your windows are constrained to
> > the browser and can't be torn off is a large limitation. No toolbars,
> > no palettes, no modal dialogs (except on IE, or if  you constrain them
> > to the browser). Lots of unnecessary chrome on your extra windows, too
> > (see below).
>
> You can get rid of the chrome with javascript, but the extra windows
> are still usually evil and unnecessary.  Just because they get used a
> lot doesn't change that.  A heck of a lot of deployed interfaces, web
> or desktop, simply suck.
>

As phishing attacks become more common, browsing are restricting the
ability to remove or modify chrome. Again, a good feature for a
browser, not so much for an application platform.

> > > > More platforms to develop on and test with.
> > > Compared to a desktop app?  I don't think so.
> > Did you ever try counting? X browsers * Y browser versions * Z
> > platforms. There are javascript and CSS bugs and differences between
> > all of these.
>
> If you can tell them to install a desktop app, you can alternatively
> tell them what browser to use.  For example we use a complicated
> firefox-only browser app where I work, that relies heavily on canvas
> objects.  But if you write your application with straightforward html
> you tend to have very few platform problems.
>

It depends on your target audience and deployment arena. The context
is cross platform applications, so at least 2 browsers and at least 2
platforms are required. Don't forget browser versioning, too - IE 5 is
different than IE 6 is different than IE 7. Even "straightforward"
HTML has non-trivial cross browser differences.

> > From my own professional experience, it's not any easier
> > to account for browser differences than it is for platform
> > differences. It's getting better as more people jump on the web
> > bandwagon and CSS and JS abstraction libraries show up,
>
> I guess I see that stuff as mostly-evil and prefer straightforward
> html.
>

You simply can't do much of anything beyond display text and basic
crud with straightforward HTML without stying. If that is the sole
limit of your UI needs, then bully for you but that's hardly the
common case and I'd venture that you don't have the experience to
support the rather sweeping claim you made.

> > I'm not talking about chrome and slickness. I'm talking about basic
> > usability concerns like "will this work with a higher font size" and
> > "will it reflow in a sensible way if I change the window size". The
> > CSS box model works okay for text, it's not so good for widgets.
>
> I just haven't had this problem with HTML interfaces.  I've never even
> used CSS, though that makes me a bit of a lamer.  An interface that
> needs to fill the whole screen with widgets is probably too
> complicated.
>

An application is not a book. Of course you fill the whole "screen"
with widgets - your application is defined by the widgets that it has,
and the amount of space those widgets take up is your screen space.

> > More than a few web apps end up writing their own layout engines in
> > dynamic javascript. This is sad. While I'm talking about chrome, add
> > "wasted screenspace due to browser chrome" to a limitation of web
> > apps, again unless you write your own browser host. This is another
> > example of a feature that makes a good browser (don't let arbitrary
> > web pages mess with my web browser functionality) clashing with the
> > desires of a good application (don't waste screen space with
> > irrelevant functionality).
>
> I guess the term I'd use to describe all these effects is "slick" and
> a heck of a lot of the time it's just not needed.  Anyway you can pop
> a chromeless browser window with a simple javascript call.
>
> > Man, you should be in PR with the way you spin things. You can't
> > implement anything except the most trivial of applications using only
> > the simple, familiar web elements like HTML forms. Anything more
> > complicated than that needs to be done with DHTML and probably AJAX,
> > and those UI elements don't look anything like the familiar ones. You
> > go in one breath from saying that you can implement dialogs in HTML to
> > saying that the rich client is the *less* familiar of the interfaces?
>
> I don't see the contradiction--with HTML you have just a few widgets
> that everyone understands and you get an interface that's almost
> always self-explanatory.  Yes you could call those interfaces trivial,
> but the little secret that I'm trying to convey is that very often,
> trivial is all that's needed.
>

That's simply not true, and I don't think you can objectively justify
it. Besides, you specifically claimed HTML dialogs as being a
replacement for "real" ones, and that can't be done using trivial
interfaces. It requires DHTML, sometimes ajax, and/or browser support.

> > If you'd said "if you're making something really simple that has
> > limited rich UI or data entry needs, consider a web application
> > instead" I wouldn't have posted. A web application is something you
> > make because the deployment and access benefits outweigh the UI and
> > integration limitations, not as your default "go to" whenever you
> > create an application.
>
> Well, I could back off to somewhere between the two.  Like, "ask
> yourself whether your application really needs a rich gui or complex
> data entry features.  If you can get by with a simple HTML interface,
> and a lot of the time you can, you'll probably have an easier time
> doing it that way and that should be the default".
>

I would challenge the assumption that, starting from zero, it is less
complicated to write a web application, much less a "pretend" web app
using a local web server, than a desktop application using Tkinter
(ick) or wxPython or pyQt. I would also challenge the assumption that
'a lot of the time' you can get away with a simple HTML interface, at
least by my personal definition of 'get away with'. I've worked a lot
with data entry people, where the actual requirements in terms of
slickness and flash are quite small. But "basic html" simply does not
fit the bill. There is a real cost in terms of how fast and how
accurately they can enter data in this environment.

Moreover, if you *don't* need global access or zero-deployment
(zero-deployment is always nice but most environments where you can
reasonably force a specific browser and version also have IT
infrastructure), then you should ask yourself if forcing your
application in the web app model (I haven't even touched on the whole
stateless HTTP being mapped to a stateful environment issue, or the
need to manage the local web server) actually buys you anything. I
simply do not buy the claim that HTML interfaces are necessarily
simpler in any but the most trivial of cases, and even in those
super-trivial applications there are often hidden concerns that don't
filter up to management.

> > I'd like an example you have of a desktop application that could have
> > just as easily been a web application. Bonus points if it's not a CRUD
> > screen, and double bonus if you don't just handwave away things like
> > file browsing. Although there are benefits even for the crud screen -
> > I've written screens and applications for data entry professionals and
> > they almost always prefer the speed optimizations you can make in a
> > client application.
>
> I guess I've written 4 or 5 nontrivial desktop gui apps and ZERO of
> them had file browsing.  One of them did need access to the pc's
> serial port, which means there had to be application code on the
> desktop, but the gui could have been a browser (talking to an
> application-embedded http server) if browsers were available in those
> days.  Another one of them saved some state to a local file but it did
> that without file browsing, and could have instead saved the state on
> a remote server if it were written as a remote app.
>

Exactly how much time do you think using an HTML interface with an
embedded server would have saved you, especially considering the
careful care you have to take with access to the serial port? For the
record, I've written over a dozen client applications, many of which I
would consider trivial (but used features that would be expensive or
impossible to implement in the browser) and probably twice that many
web apps.

> I'm not saying file browsing is never needed, just that from
> experimental observation, it's quite often not needed.
>

Plural of anecdote and all that. Make a survey of every application
that you interact with and see how many of them need to interact with
arbitrary files from the filesystem.

> Again, it all depends on what you're trying to do.  For data entry
> stuff you probably want the data on a remote server anyway, and you
> can do basic CRUD validation with fairly simple javascript.  Maybe
> that departs from pure HTML but it's nothing like the ajax/dhtml
> madness that causes the problems you've described.
> --

CRUD with javascript is something I actually have a lot of experience
with. Deficiencies in the data entry UI have real consequences because
you get invalid data and slow data entry speeds. The auto-completing
combo-box, for example, is simply impossible in a browser without
quite complicated (and slow) DHTML and is a huge boon for data entry.

I'm not trying to claim that there are no benefits to web
applications. But I often see people touting the web as a *superior
application platform*, which is simply false, and as innately simpler
to develop for, which is also false.


From exarkun at divmod.com  Fri Aug 10 13:34:47 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 10 Aug 2007 13:34:47 -0400
Subject: The Future of Python Threading
In-Reply-To: <1186763839.203679.110810@z24g2000prh.googlegroups.com>
Message-ID: <20070810173447.4947.1296823465.divmod.quotient.20944@ohm>

On Fri, 10 Aug 2007 16:37:19 -0000, "Justin T." <jmtulloss at gmail.com> wrote:
>On Aug 10, 3:52 am, Jean-Paul Calderone <exar... at divmod.com> wrote:
>> On Fri, 10 Aug 2007 10:01:51 -0000, "Justin T." <jmtull... at gmail.com> wrote:
>> >Hello,
>>
>> >While I don't pretend to be an authority on the subject, a few days of
>> >research has lead me to believe that a discussion needs to be started
>> >(or continued) on the state and direction of multi-threading python.
>>
>> > [snip - threading in Python doesn't exploit hardware level parallelism
>> >  well, we should incorporate stackless and remove the GIL to fix this]
>>
>> I think you have a misunderstanding of what greenlets are.  Greenlets are
>> essentially a non-preemptive user-space threading mechanism.  They do not
>> allow hardware level parallelism to be exploited.
>
>I'm not an expert, but I understand that much. What greenlets do is
>force the programmer to think about concurrent programming. It doesn't
>force them to think about real threads, which is good, because a
>computer should take care of that for you.Greenlets are nice because
>they can run concurrently, but they don't have to. This means you can
>safely divide them up among many threads. You could not safely do this
>with just any old python program.

There may be something to this.  On the other hand, there's no _guarantee_
that code written with greenlets will work with pre-emptive threading instead
of cooperative threading.  There might be a tendency on the part of developers
to try to write code which will work with pre-emptive threading, but it's just
that - a mild pressure towards a particular behavior.  That's not sufficient
to successfully write correct software (where "correct" in this context means
"works when used with pre-emptive threads", of course).

One also needs to consider the tasks necessary to really get this integration
done.  It won't change very much if you just add greenlets to the standard
library.  For there to be real consequences for real programmers, you'd
probably want to replace all of the modules which do I/O (and maybe some
that do computationally intensive things) with versions implemented using
greenlets.  Otherwise you end up with a pretty hard barrier between greenlets
and all existing software that will probably prevent most people from changing
how they program.

Then you have to worry about the other issues greenlets introduce, like
invisible context switches, which can make your code which _doesn't_ use
pre-emptive threading broken.

All in all, it seems like a wash to me.  There probably isn't sufficient
evidence to answer the question definitively either way, though.  And trying
to make it work is certainly one way to come up with such evidence. :)

Jean-Paul


From sean at buildingonline.com  Fri Aug 31 12:59:40 2007
From: sean at buildingonline.com (sberry)
Date: Fri, 31 Aug 2007 09:59:40 -0700
Subject: Question involving a Python app...
In-Reply-To: <1188575010.526791.156790@x35g2000prf.googlegroups.com>
References: <1188571968.529938.55770@i38g2000prf.googlegroups.com>
	<1188573903.389912.93530@r29g2000hsg.googlegroups.com>
	<1188575010.526791.156790@x35g2000prf.googlegroups.com>
Message-ID: <1188579580.590164.277680@x40g2000prg.googlegroups.com>

On Aug 31, 8:43 am, sberry <s... at buildingonline.com> wrote:
> On Aug 31, 8:25 am, kyoso... at gmail.com wrote:
>
>
>
> > On Aug 31, 9:52 am, sberry <s... at buildingonline.com> wrote:
>
> > > I am a Flash developer (also a Python dev) and I use an editor called
> > > SEPY Actionscript Editor.  The latest release version does not support
> > > Flash CS3, so I downloaded the source from subversion, edited it, and
> > > recompiled to get a version that worked with CS3.  Right now, in order
> > > to run the program I have to do a command line "python main.pyw."
>
> > > The question now is this:
> > > Others in my company would like to use the version I have compiled
> > > without installing Python, wxPython, 4suite, antlr, and a whole bunch
> > > of other Python libs.  So, how do I create an executable (on Windows)
> > > to install the program so it will run without the aforementioned
> > > framework being installed?
>
> > > I know this isn't really an entirely "Pythonic" question, but this
> > > group has always been very helpful in the past.
>
> > > Thanks
>
> > I find GUI2exe to be very easy to use. It's just py2exe with a GUI
> > frontend. Seehttp://xoomer.alice.it/infinity77/main/GUI2Exe.htmlfor
> > more information.
>
> > Mike
>
> Thanks for the help... and for giving it so quickly - I can always
> count on this group.
>
> Problems though... I was successful at creating the dist dir with my
> executable file, but when I try to run it I get an error.log file with
> the following:
>
> <type 'exceptions.IOError'>
> [Errno 9] Bad file descriptor
> [53]: main.pyw
> [29]: SEPY.pyo
> [16]: core\__init__.pyo
> [5]: core\documents\__init__.pyo
> [11]: core\documents\compare.pyo
> [15]: core\documents\editor.pyo
> [13]: core\io\__init__.pyo
> [6]: core\io\xml\__init__.pyo
> [11]: core\io\xml\autoformat.pyo
> [29]: Ft\Xml\Domlette.pyo
> [355]: Ft\Xml\InputSource.pyo
> [584]: Ft\Xml\Catalog.pyo
> [62]: warnings.pyo
> [126]: warnings.pyo
> [122]: Ft\__init__.pyo
> ------------------------
>
> Can anyone help explain what I am missing here?
>
> THANKS!

Ok, I figured some of this out.  I added the module antlr, and the
package Ft and recompiled.  Now I have the error.log down to this:

<type 'exceptions.ImportError'>
No module named shell
[53]: main.pyw
[37]: SEPY.pyo
[11]: core\io\PythonShortCut.pyo
------------------------

Any ideas on how to get rid of these last couple of errors?



From kyosohma at gmail.com  Fri Aug  3 15:35:58 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 03 Aug 2007 12:35:58 -0700
Subject: Eclipse and Python
In-Reply-To: <mailman.1573.1186158170.22759.python-list@python.org>
References: <mailman.1573.1186158170.22759.python-list@python.org>
Message-ID: <1186169758.462893.252410@z24g2000prh.googlegroups.com>

On Aug 3, 11:22 am, "Danyelle Gragsone" <ladyni... at gmail.com> wrote:
> Does anyone have any suggested websites for learning Eclipse the python way?
>
> thanks,
> Danyelle

This article is a little old, but it might be helpful to you:

http://www.ibm.com/developerworks/library/os-ecant/

I found this too. It looks a little better:

http://pydev.sourceforge.net/

Have fun!

Mike



From bdesth.quelquechose at free.quelquepart.fr  Mon Aug  6 03:51:20 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 06 Aug 2007 09:51:20 +0200
Subject: Buffering HTML as HTMLParser reads it?
In-Reply-To: <1185993078.651180.298620@19g2000hsx.googlegroups.com>
References: <1185993078.651180.298620@19g2000hsx.googlegroups.com>
Message-ID: <46b8e6c2$0$10125$426a74cc@news.free.fr>

chrispwd at gmail.com a ?crit :
> Hello,
> 
> I am working on a project where I'm using python to parse HTML pages,
> transforming data between certain tags. Currently the HTMLParser class
> is being used for this. In a nutshell, its pretty simple -- I'm
> feeding the contents of the HTML page to HTMLParser, then I am
> overriding the appropriate handle_ method to handle this extracted
> data. In that method, I take the found data and I transform it into
> another string based on some logic.
> 
> Now, what I would like to do here is take that transformed string and
> put it "back into" the HTML document. Has anybody ever implemented
> something like this with HTMLParser?

Works the same with any sax (event-based) parser. First subclass the 
parser, adding a 'buffer' (best is to use a file-like object so you can 
either write to a stream, a file, a cStringIO etc) attribute to it and 
making all the handlers writing to this buffer. Then subclass your 
customized parser, and only override the needed handlers.

Q&D example implementation:

def format_attrs(attrs) :
   return ' '.join('%s=%s' % attr for attr in attrs)

def format_tag(tag, attrs, formats):
   attrs = format_attrs(attrs)
   return formats[bool(attrs)] % dict(tag=tag, attrs=attrs)

class BufferedHTMLParser(HTMLParser):
   START_TAG_FORMATS = ('<%(tag)s>', '<%(tag)s %(attrs)s>')
   STARTEND_TAG_FORMATS = ('<%(tag)s />', '<%(tag)s %(attrs)s />')

   def __init__(self, buffer):
     self.buffer = buffer

   def handle_starttag(self, tag, attrs):
      self.buffer.write(format_tag(tag,attrs,self.START_TAG_FORMATS))
          	
   def handle_startendtag(self, tag):
     self.buffer.write(format_tag(tag,attrs,self.STARTEND_TAG_FORMATS))

   def handle_endtag(self, tag):
     self.buffer.write('</%s> % tag)

   def handle_data(self, data):
     self.buffer.write(data)

   # etc for all handlers


class MyParser(BufferedHtmlParser):
    def handle_data(self, data):
       data = data.replace(
         'Ni',
         "Ekky-ekky-ekky-ekky-z'Bang, zoom-Boing, z'nourrrwringmm"
         )
       BufferedHTMLParser.handle_data(self, data)

HTH


From thorsten at thorstenkampe.de  Sun Aug  5 03:39:16 2007
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Sun, 5 Aug 2007 15:39:16 +0800
Subject: the one python book
References: <mailman.1611.1186233912.22759.python-list@python.org>
Message-ID: <MPG.211fff8217cc12d9896fb@news.individual.de>

* dhr (Sat, 4 Aug 2007 16:23:49 +0300)
> Is there a 'K&R" type of Python book? The book that you'd better have on 
> your shelf if you are going into Python? 

For Tutorials STFW but the one and only book is definitely "Python in 
a Nutshell" from Alex "Python" Martelli. Get the second edition.

The other book I would go for is the "Python Cookbook" from Martelli 
and others.

Thorsten


From apardon at forel.vub.ac.be  Fri Aug 24 03:57:15 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 24 Aug 2007 07:57:15 GMT
Subject: tarfile module for version 2.2.3
Message-ID: <slrnfct3qq.jfo.apardon@rcpc42.vub.ac.be>

I have to write a little program that has to run on a number of hosts.
Versions of python range from 2.2.3. to 2.4.2.

The easiest way to implement the necessary behaviour seems to me to
use the tarfile module. However that was only introduced in 2.3
I had a look in the code and at first sight couldn't find anything
that would cause problems if I used this module with python 2.2.3.

Could someone confirm that the tarmodule is compatible with python 2.2.
I will try some tests myself but it would be nice to have confirmation
from elsewhere.

-- 
Antoon Pardon


From lluumb at gmail.com  Mon Aug 13 21:17:37 2007
From: lluumb at gmail.com (Alex)
Date: Tue, 14 Aug 2007 01:17:37 -0000
Subject: output object fields into a file
Message-ID: <1187054257.243592.35360@o61g2000hsh.googlegroups.com>

Hello,  I am rather new to python.  Maybe my thinking is in the
paradigm of C++, that makes me hard to make sense of some python
scripts (interacting with C# code) written by my colleague.  I am
thinking of outputting all objects and their fields of each script
into a file.  The tricky part is I am NOT quite sure of the type of
the fields.  How can I output these objects and their fields into an
external file.  Any code sample would be highly appreciated !!!

Alex



From aleax at mac.com  Mon Aug 20 11:43:51 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 20 Aug 2007 08:43:51 -0700
Subject: yet another indentation proposal
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
	<13ci0oesdtlh871@corp.supernews.com>
	<_49yi.9351$3x.6614@newssvr25.news.prodigy.net>
	<1187589173.410862.132580@o80g2000hse.googlegroups.com>
	<D_gyi.6547$sH3.154@fe091.usenetserver.com>
Message-ID: <1i34ybq.97ox25y3zfpfN%aleax@mac.com>

Aaron <cajnnjonaj at fjireanjtjprodjuctijons.com> wrote:
   ...
> That's probably what I'll end up doing.  The only drawback to that is that
> it solves the problem for me only.  Perhaps I will open source the scripts
> and write up some documentation so that other folks in a similar situation
> don't have to reinvent the wheel.  

As I pointed out in another post to this thread,
Tools/scripts/pindent.py IS open-source, indeed it's part of the Python
source distribution.  Why not use and/or adapt that?

> The only unfortunate aspect to that is 
> that blind newbies to the language will have to figure out setting up a
> shell script or batch file to pipe the output of the filter into Python on
> top of learning the language.  I admit, it's probably not that much work,
> but it is one more stumblingblock that blind newcomers will have to 
> overcome.

pindent.py's approach ensures that the tool's output is also entirely
valid Python (as it only adds comments to mark and "explain" block
ends!) so no "piping the output into Python" is at all needed; you only
need (editor-dependent) to ensure pindent.py is run when you LOAD a
Python source file into your editor.  If anything, pindent.py and/or the
screen reader of choice might be tweaked to "read out" Python sources
more clearly (e.g. by recognizing block-end comments and reading them
differently than other comments are read).


Alex


From bj_666 at gmx.net  Fri Aug 10 14:21:55 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 Aug 2007 18:21:55 GMT
Subject: Puzzled by "is"
References: <20070809194105.39BD11E400A@bag.python.org>
	<f9frbl$dps$1@sea.gmane.org>
	<mailman.1814.1186692638.22759.python-list@python.org>
	<87zm1042f0.fsf@benfinney.id.au>
	<mailman.1839.1186768658.22759.python-list@python.org>
Message-ID: <5i3om3F3kqc46U5@mid.uni-berlin.de>

On Fri, 10 Aug 2007 10:57:22 -0700, Dick Moores wrote:

> At 06:13 PM 8/9/2007, Ben Finney wrote:
>>Others have already said that it's an implementation optimisation,
>>which seems to partly answer your question.
>>
>>It's important to also realise that the language is *deliberately*
>>non-committal on whether any given value will have this behaviour;
>>that is, it's entirely left to the language implementation which
>>optimisation trade-offs to make, and the language user (that's you and
>>I) should *not* expect any particular behaviour to hold between
>>different implementations.
> 
> I'm not clear on the meaning of "implementations" 
> here.  Would 2.5 for Windows, Mac, Linux all be 
> different implementations? Would Iron Python be another? ActivePython?

Taken to the extreme you shouldn't rely on implementation details at all,
so even the very same interpreter might cache and reuse the empty tuple in
one run but not in the next.

For me CPython, Iron Python and Jython are different implementations as
they are all written from scratch.

Ciao,
	Marc 'BlackJack' Rintsch


From zzbbaadd at aol.com  Thu Aug 30 15:17:26 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Thu, 30 Aug 2007 12:17:26 -0700
Subject: subclassing Python types
In-Reply-To: <1188501226.443493.94720@i13g2000prf.googlegroups.com>
References: <1188500442.434722.157350@q5g2000prf.googlegroups.com>
	<1188501226.443493.94720@i13g2000prf.googlegroups.com>
Message-ID: <1188501446.781039.241630@e9g2000prf.googlegroups.com>

On Aug 30, 12:13 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> On Aug 30, 8:00 pm, zzbba... at aol.com wrote:
>
> > I have read that you can derive from the base classes such as str,
> > list, dict.
>
> > I guess this would look like:
>
> > def MyString(str):
> > def MyList(list):
> > def MyDict(dict):
>
> You mean
>
> class MyString(str):
> ...
>
> > How do you access the data that is contained in the super class?
>
> The same way that you access plain strings, lists or dicts: use the
> methods of the super class.
>

I don't know what name I would use to call a method:


class MyString(str):
    def __init__(strInput):
       ????? = strInput




From bj_666 at gmx.net  Thu Aug  9 09:11:31 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 9 Aug 2007 13:11:31 GMT
Subject: Jython - variables are stored somehow
References: <1186662600.413645.25430@22g2000hsm.googlegroups.com>
Message-ID: <5i0i43F3kuhitU2@mid.uni-berlin.de>

On Thu, 09 Aug 2007 05:30:00 -0700, nmin wrote:

> So, executing the function genData() in skript .py runs without
> problem but if I execute the same function again, the data from the
> first run is stored somehow and is added to the new data.
> 
> So, if you look at the result:
> #1 in DatenTypen.py return an empty list each time the program runs.
> Ok ... clear so far
> #2 in library.py returns an empty list, when the program runs for the
> first time ... but when the function is
> called again, the list contains an element. Each time you call the
> function again, one element is added!
> Why??  out.abschnitte should be the same as printed in #1 or not?

`out.abschnitte` is a *class* attribute so it is the same list on all
instances of that class.

> class AusgangsDatenDeichMonitor:
> 
>     abschnitte=[]

Everything on this level belongs to the class, so `abschnitte` is a class
attribute and shared by all instances of `AusgangsDatenDeichMonitor`.

>     def __init__(self):
>         abschnitte=[]
>         print "Abschnitt in DatenTypen: "+str(abschnitte) #1

Remove the class attribute and change the `__init__()` to:

    def __init__(self):
        self.abschnitte = list()
        print "Abschnitt in DatenTypen: " + str(self.abschnitte)


> So, I read about deleting Instances with "del" ... but it does not
> work at all.

You can't delete objects with ``del``, just names or references to objects
in containers.

Ciao,
	Marc 'BlackJack' Rintsch


From rrs at researchut.com  Tue Aug 14 07:27:50 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Tue, 14 Aug 2007 16:57:50 +0530
Subject: Module imports during object instantiation
References: <4c3vo4-u7k.ln1@learner.hq.netapp.com> <f9pcuj$6n4$1@sea.gmane.org>
	<mailman.1931.1187030415.22759.python-list@python.org>
	<46c16ec9$0$405$426a34cc@news.free.fr>
Message-ID: <m6g8p4-10o.ln1@learner.hq.netapp.com>

Bruno Desthuilliers wrote:

>>> What's leading you to conclude the import isn't being executed? You
>>> realise, I trust, that the module's code will only be executed on the
>>> first call to __init__()?
>>>
>> 
>> Well. Putting it in a "try" inside __init__() doesn't do anything.
> 
> This would be highly suprising.
>

Yes, it is surprising. Unfortunately. :-(
Or maybe I'm doing something really dumb.
 
>> The
>> import never happens.
> 
> As soon as your running this code on a platform where os.name yields
> either 'nt' or 'dos', the import statement is executed. You can bet your
> ass on this. Now this import can fail for a lot of reasons (imported
> module not in sys.path, error in the imported module, etc), and since
> your catching *and dismissing* the ImportError, you don't know what
> effectively happens. It's like someone send you mails, you set your
> filter to trash mails from this person, and then complain this person
> never send you mails !-)
> 
>> And thus if I make a call in any of the methods, it
>> fails with an error message. A NameError IIRC.
> 
> "IIRC" ? Inspecting the traceback may help, you know.

There's no traceback because the import never happens.

Here's what I've captured for you exactly I see on my terminal


rrs at learner:/tmp$ cat rick.py
class Log:
    def __init__(self, verbose, lock = None):
        self.VERBOSE = bool(verbose)
        self.lock = bool(lock)

        if self.lock:
            self.dispLock = threading.Lock()
        else:
            self.dispLock = None

        if os.name == 'posix':
            try:
                import foobar
            except ImportError, e:
                print >> sys.stderr, e

            self.platform = 'posix'
            self.color = get_colors()

        elif os.name in ['nt', 'dos']:
            self.platform = 'microsoft'
            try:
                import SomeModule
            except ImportError, e:
                # comment out next line before going to prod...
                print >> sys.stderr, e

                self.color = None
            else:
                self.color = SomeModule.get_colors_windows()
        else:
            self.platform = None
            self.color = None
rrs at learner:/tmp$ python
Python 2.4.4 (#2, Jul 21 2007, 11:00:24)
[GCC 4.1.3 20070718 (prerelease) (Debian 4.1.2-14)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os, sys
>>> os.path.abspath(os.curdir)
'/tmp'
>>> from rick import Log
>>> import rick
>>> os.name
'posix'
>>> import foobar
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named foobar
>>>



For the 'posix' OS, I'm doing an erratic import which should fail and print
the error message.

See, it prints nothing. This _is_ what has made me conclude that imports
aren't executed in __init__(). But hey, they will get executed if you put
them in any of the methods (which is again illogical because methods
can/are called multiple times).

Ritesh
-- 
If possible, Please CC me when replying. I'm not subscribed to the list.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  9 11:42:20 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 09 Aug 2007 17:42:20 +0200
Subject: Help with Dictionaries and Classes requested please.
In-Reply-To: <slrnfbm77i.uc.horpner@FIAD06.norwich.edu>
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
	<46baf183$0$433$426a74cc@news.free.fr>
	<46baf384$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bb00d4$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
	<slrnfbm34n.n0.horpner@FIAD06.norwich.edu>
	<46bb19bb$0$399$426a74cc@news.free.fr>
	<slrnfbm77i.uc.horpner@FIAD06.norwich.edu>
Message-ID: <46bb35d4$0$407$426a74cc@news.free.fr>

Neil Cerutti a ?crit :
> On 2007-08-09, Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>> Neil Cerutti a ?crit :
>>> On 2007-08-09, special_dragonfly <Dominic at PLEASEASK.co.uk> wrote:
>>>> Is there anyway for python to consider the values within a
>>>> string when entering the data into a dictionary. I know that
>>>> isn't very clear so here's an example:
>>>>
>>>> class MyClass(object):
>>>>     def __init__(self,name="",age=""):
>>>>         self.name=name
>>>>         self.age=age
>>>>
>>>> data="Gary,50"
>>>> d={0:[MyClass(data)]}
>>>> data="Adam,25"
>>>> d[0].append(MyClass(data))
>>>>
>>>> The data is coming from a text file working on a line by line
>>>> basis. I've just tried and I'm just getting the full string in
>>>> the first field. That seems logical, now I don't want it to
>>>> though!
>>> That's what happens if you use 0 for the key every time. ;)
>> Hmmm... Neil, I may be wrong but I think you didn't get the
>> point here. As I understand it,  Dominic's problem is that it
>> gets strings like "Gary,50" and would like to call MyClass
>> initializer this way : MyClass("Gary", "50")
> 
> My guess was he doesn't need a class at all,

Mmm... That's possible (and if all he has in MyClass are name and age 
data attributes, then you're obviously right). But then your answer was 
perhaps a bit confusing (at least it confused me...)



From bdesth.quelquechose at free.quelquepart.fr  Mon Aug 20 14:22:49 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 20 Aug 2007 20:22:49 +0200
Subject: How to optimise this code?
In-Reply-To: <mailman.68.1187711977.32294.python-list@python.org>
References: <mailman.68.1187711977.32294.python-list@python.org>
Message-ID: <46ccb0d2$0$437$426a74cc@news.free.fr>

David N Montgomery a ?crit :
> class testCase:
>     def __init__(self, tc):
>         if tc == 1:self.testCase1()
>         if tc == 2:self.testCase2()
>         if tc == 3:self.testCase3()
>         if tc == 4:self.testCase4()
>         if tc == 5:self.testCase5()
>         if tc == 6:self.testCase6()

def __init__(self, tc):
   func = getattr(self, "testCase%s" % tc, None)
   if callable(func):
     func()


>     def testCase1(self):
>         print "tc1"
> 
>     def testCase2(self):
>         print "tc2"
> 
>     def testCase3(self):
>         print "tc3"
> 
>     def testCase4(self):
>         print "tc4"
> 
>     def testCase5(self):
>         print "tc5"
> 
>     def testCase6(self):
>         print "tc6"
> 
> 
>     def testCaseX(self):
>         print "tcX"
> 
> totalNumberOfTestCases = 6
> x = 0
> while x <= totalNumberOfTestCases:
>     x += 1    
>     testCase(x)

for x in range(totalNumberOfTestCases):
    testCase(x)

> 
> This template code is working, but I envisage having 100+ test cases and
> am concerned about my useage of if statements.

At least learn the use of the 'elif' statement... But in this case, you 
just don't need it.

> I would be grateful for
> any pointers as to how I can run all tests cases, regardless of how
> many, in a more efficient manner.

for name in dir(testCase):
   if name.startswith('testCase'):
     tc = getattr(testCase(), name)
     if callable(tc):
       tc()

But all this code smells IMHO (starting with your __init__ method which 
is not an initializer...)

There's no shortage of unit-test packages in Python:
- unittest (in the standard lib)
- py.test (http://codespeak.net/py/dist/test.html)
- nose (http://www.somethingaboutorange.com/mrl/projects/nose/)

Do you have any compelling reason to reinvent the wheel ?


From mccredie at gmail.com  Wed Aug 22 16:38:44 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Wed, 22 Aug 2007 13:38:44 -0700
Subject: What Are These Import/From Statements about?
In-Reply-To: <qb0zi.47332$Um6.34487@newssvr12.news.prodigy.net>
References: <un_yi.34471$2v1.24183@newssvr14.news.prodigy.net>
	<mailman.123.1187804723.32294.python-list@python.org>
	<qb0zi.47332$Um6.34487@newssvr12.news.prodigy.net>
Message-ID: <9e95df10708221338x5ca5f055mc31bc71d0924b398@mail.gmail.com>

> While that's an interesting link, I was thinking of the named items like:
>  Numeric, (this one I know about.)
>  Image
>  ImageChops
>  ImageTk
>  time
>  binascii
>  tkMessageBox
>  tkSimpleDialog

The `image' ones are all part of PIL (Python Imaging Library) which is
a third party module (http://www.pythonware.com/products/pil/). The
others: time, binascii, os.path, tkMessageBox and tkSimpleDialog are
all part of the standard library
(http://docs.python.org/modindex.html). I don't see the documentation
for the tk* ones in the global module index, but you can always look
at the source. I'm not sure what MakeQTE is. If this is a program you
are able to run, you should be able to do something like this:

>>> import MakeQTE
>>> print MakeQTE.__file__

That will show you where it lives, and you can then look at the source
for more clues.

Also, you should be able to do this:

>>> import MakeQTE
>>> help(MakeQTE)

Which will also likely give you some good clues.

-Matt


From philippe.martin at att.net  Mon Aug 27 01:01:39 2007
From: philippe.martin at att.net (hg)
Date: Mon, 27 Aug 2007 05:01:39 GMT
Subject: ANN: SCF released GPL
In-Reply-To: <1i3h3ki.1poi7cm865i17N%aleax@mac.com>
References: <2qnAi.21495$eY.19028@newssvr13.news.prodigy.net>
	<1i3h3ki.1poi7cm865i17N%aleax@mac.com>
Message-ID: <TUsAi.47762$Um6.11531@newssvr12.news.prodigy.net>

Alex Martelli wrote:
> hg <hg at nospam.org> wrote:
>    ...
>> I am looking for a free subversion server resource to put the code ...
>> if you know of any.
> 
> Check out code.google.com -- it has a hosting service for open source
> code, too, these days (and it IS subversion).
> 
> 
> Alex

Will look it up ... thanks.

hg


From horpner at yahoo.com  Wed Aug 15 11:38:03 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 15 Aug 2007 15:38:03 GMT
Subject: closing StringIO objects
Message-ID: <slrnfc67ml.27o.horpner@FIAD06.norwich.edu>

The documentation says the following about StringIO.close:

  close( ) 
  Free the memory buffer. 

Or else... what? 

-- 
Neil Cerutti


From shahargs at gmail.com  Tue Aug  7 04:23:48 2007
From: shahargs at gmail.com (shahargs at gmail.com)
Date: Tue, 07 Aug 2007 01:23:48 -0700
Subject: Regular Expression Groups - loop
In-Reply-To: <5hqndvF3ldifeU4@mid.uni-berlin.de>
References: <1186472689.488634.23360@b79g2000hse.googlegroups.com>
	<5hqndvF3ldifeU4@mid.uni-berlin.de>
Message-ID: <1186475028.695736.201000@57g2000hsv.googlegroups.com>

Thank You, Marc and Peter. now, it's working.

Shahar.



From hhygcy at gmail.com  Mon Aug 13 04:38:07 2007
From: hhygcy at gmail.com (Ge Chunyuan)
Date: Mon, 13 Aug 2007 08:38:07 -0000
Subject: verify whether "str" is still callable in Python 2.5.1
Message-ID: <1186994287.527549.119170@19g2000hsx.googlegroups.com>

hi Group:

Once use ActivePython latest version for Python 2.5.1.
I happened to find function "str" is not callable, but it is available
for Python 2.5.
Can anybody give some comments about it?
Any response is highly appreciated.



Thanks
Ge Chunyuan



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Aug 27 17:45:40 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 27 Aug 2007 23:45:40 +0200
Subject: "Try:" which only encompasses head of compound statement
References: <1188250535.607963.42540@22g2000hsm.googlegroups.com>
Message-ID: <5jgv04F3r8ia0U1@mid.individual.net>

 Jameson.Quinn at gmail.com wrote:
> I have:
> 
> try:
>     for line in open(myFileName):
>         count += 1
> except IOError:
>     print "Can't open myfile"
> 
> (I know, this is bad, I never close the file, but its just for
> illustration). But then I change it to:
> 
> try:
>     for line in open(myFileName):
>         count += openAndProcessSubfile(line)
> except IOError:
>     print "Can't open myfile"
> 
> ... now the 'except' incorrectly catches errors from
> openAndProcessSubfile.

The typical way to counter this would be by catching the IOError
earlier so it won't propagate to the outmost "try":

try:
    for line in open(myFileName):
        try: 
            count += openAndProcessSubfile(line)
        except IOError:
            print "Can't open subfile"
except IOError:
    print "Can't open myfile"

Regards,


Bj?rn

-- 
BOFH excuse #121:

halon system went off and killed the operators.



From greg at cosc.canterbury.ac.nz  Tue Aug  7 22:06:39 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Wed, 08 Aug 2007 14:06:39 +1200
Subject: Importing * From a Package
In-Reply-To: <mailman.1712.1186492584.22759.python-list@python.org>
References: <e2a1d0aa0708060706p1f50d5c1j93b6cc3679522597@mail.gmail.com>	<20070806143253.4947.1097304571.divmod.quotient.19513@ohm>
	<mailman.1712.1186492584.22759.python-list@python.org>
Message-ID: <5hsn0lF3lufisU1@mid.individual.net>

Patrick Doyle wrote:
> This is the part that has me confused -- why does "from package import
> *" go on to import names that were explicitly loaded by previous
> import statements?

Because there's no easy way for it *not* to do that.
All it does is grab whatever names are defined in the
module at the time. It can't tell whether those names
got there as a result of an import statement or some
other way.

A more pertinent question is why it *doesn't* import
submodules that haven't already been explicitly imported.
Probably this is just because it could be quite expensive
to do so -- you would potentially be triggering a lot
of disk activity to load the previously unused modules
into memory, many of which you may not be going to use.

Just in case it's not clear, "importing" can actually
mean two different things. If the module hasn't been
imported before, it has to be loaded into memory, which
is expensive. If it has been imported before, then
you're just creating another reference to the same
module object, which is very cheap. An import *
just does the cheap part, and leaves you to explicitly
ask for the expensive part if you really want it.

--
Greg


From horpner at yahoo.com  Tue Aug 28 11:50:06 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 28 Aug 2007 15:50:06 GMT
Subject: int/long bug in locale?
References: <1188309809.592078.58960@22g2000hsm.googlegroups.com>
Message-ID: <slrnfd8h9o.pc.horpner@FIAD06.norwich.edu>

On 2007-08-28, tkpmep at hotmail.com <tkpmep at hotmail.com> wrote:
>>>> import locale
>
>>>>locale.setlocale(locale.LC_ALL, 'English_United States.1252')
> 'English_United States.1252'
>
>>>> locale.format('%d', float('2244012500.0000'), grouping = True)
>
> Traceback (most recent call last):
>   File "<pyshell#28>", line 1, in <module>
>     locale.format('%d', float('2244012500.0000'), grouping = True)
>   File "C:\Python25\lib\locale.py", line 145, in format
>     formatted = percent % value
> TypeError: int argument required
>
> However, if the number is <= 2**31-1, it works just fine:
>>>>locale.format('%d', float('224401250.0000'), grouping = True)
> '224,401,250'
>
> Interestingly, if I first convert the floats to ints, , the function
> works just fine, even if the numbers exceed 2**31-1:
>>>> locale.format('%d', int(float('2244012500.0000')), grouping = True)
> '2,244,012,500'
>
> Is there an int/long related bug lurking in locale?

If it is a bug, it is not in the locale code.

>>> '%d' % float('224401250000.0000')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: int argument required

The documentation for the string formating operation doesn't
specify what happens when you convert a non-int with specifier
'%d'. In defense of your code, there's also no explicit
requirement to do that.

http://docs.python.org/lib/typesseq-strings.html

-- 
Neil Cerutti


From katietam at gmail.com  Mon Aug  6 15:02:04 2007
From: katietam at gmail.com (Katie Tam)
Date: Mon, 06 Aug 2007 19:02:04 -0000
Subject: Any Good Book To Start ?
Message-ID: <1186426924.388898.224310@l70g2000hse.googlegroups.com>

Please let me know any good book to start ? Thank You


Katie Tam
CCNP, CCDP
LinkWaves Corporation
**Leading Provider of Cisco Equipment**
http://www.linkwaves.com



From ivoras at __fer.hr__  Thu Aug 30 15:55:36 2007
From: ivoras at __fer.hr__ (Ivan Voras)
Date: Thu, 30 Aug 2007 21:55:36 +0200
Subject: Biased random?
In-Reply-To: <mailman.80.1188332647.28954.python-list@python.org>
References: <favd0c$fcu$1@ss408.t-com.hr>
	<mailman.80.1188332647.28954.python-list@python.org>
Message-ID: <fb77bq$jtk$1@ss408.t-com.hr>

Jeffrey Barish wrote:

> If you take the difference between two uniformly distributed random
> variables, the probability density function forms an isosceles triangle
> centered at 0.  Take the absolute value of that variable and the pdf is a
> straight line with maximum value at 0 tapering to 0 at max.  Thus,
> 
> z = abs(randint(0, max) - randint(0, max))
> 
> ought to do the trick.

It's elegant :)

I've noticed something interesting in my test: the value 0 appears less
often than other values (which behave as they should). I wrote this test
script:

from random import randint

map = {}
for x in xrange(11):
        map[x] = 0

for a in xrange(500):
        x = abs(randint(0, 10) - randint(0, 10))
        map[x] += 1

print map

and here are some results:

> python a.py
{0: 49, 1: 66, 2: 72, 3: 73, 4: 64, 5: 55, 6: 40, 7: 36, 8: 18, 9: 18,
10: 9}
> python a.py
{0: 34, 1: 90, 2: 77, 3: 61, 4: 56, 5: 52, 6: 42, 7: 34, 8: 27, 9: 15,
10: 12}
> python a.py
{0: 33, 1: 80, 2: 84, 3: 62, 4: 52, 5: 46, 6: 51, 7: 31, 8: 35, 9: 16,
10: 10}
> python a.py
{0: 50, 1: 100, 2: 69, 3: 53, 4: 63, 5: 47, 6: 41, 7: 26, 8: 30, 9: 11,
10: 10}
> python a.py
{0: 31, 1: 84, 2: 70, 3: 70, 4: 74, 5: 50, 6: 38, 7: 28, 8: 31, 9: 15,
10: 9}
> python a.py
{0: 43, 1: 101, 2: 79, 3: 66, 4: 41, 5: 59, 6: 37, 7: 30, 8: 26, 9: 15,
10: 3}
> python a.py
{0: 44, 1: 108, 2: 74, 3: 50, 4: 53, 5: 54, 6: 39, 7: 34, 8: 28, 9: 13,
10: 3}
> python a.py
{0: 42, 1: 72, 2: 70, 3: 72, 4: 61, 5: 54, 6: 41, 7: 36, 8: 30, 9: 15,
10: 7}

If I ignore the case when the delta is 0, it works fine, but I don't
understand why should the 0-case happen less often than others.


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From emperorcezar at gmail.com  Thu Aug  2 22:07:36 2007
From: emperorcezar at gmail.com (emperorcezar at gmail.com)
Date: Fri, 03 Aug 2007 02:07:36 -0000
Subject: Job Fair F/OSS project
Message-ID: <1186106856.186249.307850@57g2000hsv.googlegroups.com>

Hello Pythonistas!

I'm looking for some volunteers for a new open source project. At the
Institute of Design (http://www.id.iit.edu ), our next project is a
system for the management of our job fair (http://www.id.iit.edu/
recruitID/ )

The systems goal is to allow students and employers to enter their
availability for interviews and have the system designate times and
rooms for each to meet for interviews. The system includes much more
than just this of course, but that is the main goal. We decided that
this application is generic enough that it should be made into an F/
OSS project.

So far the system will be built on Django and uses (hopefully)
Prototype.js

The project is on the ground floor and some basic wire frames and a
few other preliminary designs.

I'm personally located in Chicago and West Virginia (about half of my
time spent in each place), though you are welcome to help out from
anywhere around the world!

If you're interested, reply to this message, or contact me at cezar AT
id.iit.edu



From splifingate at gmail.com  Fri Aug 17 20:10:56 2007
From: splifingate at gmail.com (ah)
Date: Fri, 17 Aug 2007 20:10:56 -0400
Subject: What does this thread have to do with classical music,
In-Reply-To: <010820072033374341%erfc@caballista.org>
References: <7nnh7350b5h25ghocra72b23mmsnnkj8bh@4ax.com>
	<4692df4a$0$4804$8f2e0ebb@news.shared-secrets.com>
	<469392cd$0$97226$892e7fe2@authen.yellow.readfreenews.net>
	<469445b3$0$4819$8f2e0ebb@news.shared-secrets.com>
	<4694e124$0$97214$892e7fe2@authen.yellow.readfreenews.net>
	<46957ef1$0$10227$8f2e0ebb@news.shared-secrets.com>
	<46963170$0$97261$892e7fe2@authen.yellow.readfreenews.net>
	<46981df7$0$12095$8f2e0ebb@news.shared-secrets.com>
	<46990784$0$97223$892e7fe2@authen.yellow.readfreenews.net>
	<4699297c$0$4706$4c368faf@roadrunner.com>
	<140720071431044860%erfc@caballista.org>
	<46a3a1a7$0$15115$8f2e0ebb@news.shared-secrets.com>
	<220720072148091069%erfc@caballista.org>
	<46a5385d$0$4832$8f2e0ebb@news.shared-secrets.com>
	<250720071834457296%erfc@caballista.org>
	<46aceaa5$0$13281$8f2e0ebb@news.shared-secrets.com>
	<290720071853200863%erfc@caballista.org>
	<46b12539$0$4807$8f2e0ebb@news.shared-secrets.com>
	<010820072033374341%erfc@caballista.org>
Message-ID: <46c63474$0$4844$8f2e0ebb@news.shared-secrets.com>

Art Deco wrote:
> ah <splifingate at gmail.com> wrote:
>>Art Deco wrote:
>>> ah <splifingate at gmail.com> wrote:
>>>>Art Deco wrote:
>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>Art Deco wrote:
>>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>>Art Deco wrote:
>>>>>>>>> Who wrote?
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>>> 
>>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>>> 
>>>>>>>>> How many more times will you be asking the same tired, lame questions,
>>>>>>>>> Tholen?
>>>>>>>>
>>>>>>>>Till 2056?
>>>>>>> 
>>>>>>> At that point, he will have made the Thirty Years Pset War look like
>>>>>>> 1967 in the Sinai.
>>>>>>
>>>>>>It must have been Hell to keep a garden during those times.
>>>>>>
>>>>>>Did they all eat jerky, or what?
>>>>> 
>>>>> Worse -- worm-laden hardtack.
>>>>
>>>>Luxury!
>>>>
>>>>Why, I remember when I was a lad . . . we used to watch the local churls
>>>>across the fences eating that well.
>>>>
>>>>We only had millings (and (occasionally) water) on Tuesdays and Fridays.
>>> 
>>> Grog and hardtack, life is good!
>>
>>?Viva la basura!
> 
> Vivat les ordures!

Vivara los trunctiato!


From indu_shreenath at yahoo.co.in  Thu Aug  9 03:34:22 2007
From: indu_shreenath at yahoo.co.in (Indu Shreenath)
Date: Thu, 9 Aug 2007 08:34:22 +0100 (BST)
Subject: how to get output.
In-Reply-To: <5hvrhhF3m15c7U1@mid.uni-berlin.de>
Message-ID: <519.93370.qm@web8603.mail.in.yahoo.com>

Hey,
   
  I did write the following:
  but it does not work.
   
  import subprocess as sp
try:
       = sp.Popen("DIR . /AD /B", stdout=sp.PIPE)
    result = p.communicate()[0]
    print result           
 except:   
       print "error"
   
  This throws error.
  DIR . /AD /B will list out only directories in the current directory.
   
  Thanks,
  Indu


"Diez B. Roggisch" <deets at nospam.web.de> wrote:
  indu_shreenath schrieb:
> Hey,
> I want to get the output of "DIR /AD /B" command to a varriable using 
> python. How can I do this?

Using the subprocess-module.


However, I'm not sure what DIR /AD /B does - but there are many 
functions in module os that might deliver what you want without invoking 
an external command.

Diez
-- 
http://mail.python.org/mailman/listinfo/python-list


       
---------------------------------
 Unlimited freedom, unlimited storage. Get it now
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From patelkundan at gmail.com  Fri Aug  3 07:45:30 2007
From: patelkundan at gmail.com (Sonu)
Date: Fri, 03 Aug 2007 11:45:30 -0000
Subject: How to create python script which can create csv we file with
	relationship
Message-ID: <1186141530.243539.6370@q75g2000hsh.googlegroups.com>

hello,
i need to create script
that can create a csv file as i want
for example i have two table in database that are person ,country
if i want to create csv file to person,then wht to do ,,
how to connect database,how to create csv of interrelated field
eg :in person table :country_id (which is primary key of country table)



From paddy3118 at googlemail.com  Mon Aug 13 01:25:40 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Mon, 13 Aug 2007 05:25:40 -0000
Subject: Complexity of methods etc
In-Reply-To: <mailman.1892.1186963490.22759.python-list@python.org>
References: <mailman.1892.1186963490.22759.python-list@python.org>
Message-ID: <1186982740.932185.163180@o61g2000hsh.googlegroups.com>

On Aug 13, 1:04 am, "Nathan Harmston" <ratchetg... at googlemail.com>
wrote:
> Hi,
>
> I was wondering if anyone knew of any resources, where I might be able
> to find information about the complexity of certain python functions
> or little tips on how to reduce complexity. I mean like the "".join(),
> kind of thing?
>
> I want to see if there are any improvements I can add to my coding in
> order to reduce  time/space usage/
>
> Many Thanks in advance
>
> Nathan

There is this collection:
http://python.net/~goodger/projects/pycon/2007/idiomatic/handout.html
Although I don't think algorithm complexity is given, it is telling
you how to select the most efficient way of doing things in a number
of examples.

- Paddy.



From antroy at gmail.com  Tue Aug  7 06:32:42 2007
From: antroy at gmail.com (Ant)
Date: Tue, 07 Aug 2007 03:32:42 -0700
Subject: regexp problem in Python
In-Reply-To: <1186177312.117581.129910@d55g2000hsg.googlegroups.com>
References: <1186177312.117581.129910@d55g2000hsg.googlegroups.com>
Message-ID: <1186482762.940193.178430@19g2000hsx.googlegroups.com>

On Aug 3, 10:41 pm, Ehsan <ehsan.khod... at gmail.com> wrote:
...
> what can I do? what's wrong whit this pattern? thanx for your comments

Nothing. There's something wrong with the code you are using the regex
with. Post it and we may be able to help. Like Lawrence has said, it's
likely to be that you are using m.group(1) with your match object
instead of m.group(0) - the former gets the first group (i.e.
everything between the first set of parens - in your case the wmv|3gp
expression), whereas the latter will return the entire match.

Post your actual code, not just the regex.

--
Ant...

http://antroy.blogspot.com/





From oliver at ootbc.com  Sat Aug 18 13:05:36 2007
From: oliver at ootbc.com (Oliver Nelson)
Date: Sat, 18 Aug 2007 17:05:36 GMT
Subject: Cancelling events on a COM Object
In-Reply-To: <1187309979_991@sp12lax.superfeed.net>
References: <bF3xi.1834$4w7.1163@newssvr22.news.prodigy.net>
	<1187309979_991@sp12lax.superfeed.net>
Message-ID: <AFFxi.46800$Um6.16546@newssvr12.news.prodigy.net>

Roger,

I tried modifying my code so that I have

def OnBeforeClick(self, Button, Shift, X, Y, Cancel):
	print "click"
	Cancel = True
	return Cancel

But this doesn't seem to have changed anything.  Am I doing this wrong?

OLIVER

Roger Upole wrote:
> Oliver Nelson wrote:
> 
>> I have MapPoint working in Python, and I'm trying to cancel events on the map, but I can't seem to make that happen.  I'm
>> responding to the events successfully in my panel object.  My code is like this:
>>
>> global MapPointMod
>> MapPointMod = win32com.client.gencache.EnsureModule("{51C0A9CA-F7B7-4F5A-96F4-43927C6FA50F}", 0, 1, 0)
>>
>> class MyPanel(wx.Panel):
>>     def __init__(self, *args, **kwds):
>>         # begin wxGlade: MyPanel.__init__
>>         kwds["style"] = wx.TAB_TRAVERSAL
>>         wx.Panel.__init__(self, *args, **kwds)
>>         self.frame = args[0]
>>
>>         MyMap = MakeActiveXClass(MapPointMod.MappointControl, eventObj=self)
>>         self.window_1 = MyMap(self, -1)
>>         self.window_1.OpenMap("C:\\TEMP\\GPS_ON.ptt")
>> ...
>> ...
>>     def OnBeforeClick(self, Button, Shift, X, Y, Cancel):
>>         print "tada"
>>
>>
>> My event fires just fine, but I can't seem to figure out how to cancel the event so that mappoint doesn't do its stuff with
>> it...I've tried setting Cancel based on the mappoint specs, but it doesn't seem to get sent back anywhere...
>>
>> Any ideas please?
>>
>> Thanx,
>>
>> OLIVER
> 
> Instead of assigning to the variable name, output parameters need to be
> returned from the method
> 
>              Roger
> 
> 
> 
> 


From tkpmep at hotmail.com  Fri Aug 17 15:35:28 2007
From: tkpmep at hotmail.com (tkpmep at hotmail.com)
Date: Fri, 17 Aug 2007 12:35:28 -0700
Subject: Downloading multiple csv files from a website
In-Reply-To: <1187362977.390391.49170@d55g2000hsg.googlegroups.com>
References: <1187356117.474747.189980@g4g2000hsf.googlegroups.com>
	<1187358972.458872.241790@i13g2000prf.googlegroups.com>
	<1187362977.390391.49170@d55g2000hsg.googlegroups.com>
Message-ID: <1187379328.357435.140350@57g2000hsv.googlegroups.com>

Mike,

Thanks for the pointers. I looked through the ASPN cookbook, but found
a more reliable (and easier to implement) way to get the files I want.
I downloaded GNU Wget from http://users.ugent.be/~bpuype/wget/( the
current version is 1.10.2), and then ran it from Python as follows

import os
rc = os.system('wget --debug --output-document="c:\\downloads\
\russell1000index_cyr.csv" --output-file=log.txt
http://www.russell.com/common/indexes/csvs/russell1000index_cyr.csv')


rc is the return code, and is 0 if the download succeeds. I also tried
the subprocess module

import subprocess
f = subprocess.Popen('wget --debug --output-document="c:\\downloads\
\russell1000index_cyr.csv" --output-file=log.txt
http://www.russell.com/common/indexes/csvs/russell1000index_cyr.csv')

This, too, works just fine. Wget does a lot more error-checking than
the recipe in the Python cookbook, does FTP as well as http, and
supports OpenSSL - its essentially a one-stop solution. In addition, I
can write batch files that do all the downloads without any need for
Python to be installed on the machine.

Thanks again

Thomas Philips



From wolf_tracks at invalid.com  Sun Aug 19 18:49:30 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sun, 19 Aug 2007 22:49:30 GMT
Subject: Python on Computation, Math and Statistics
In-Reply-To: <faaepr$g2v$1@news3.zwoll1.ov.home.nl>
References: <m_%xi.34088$2v1.7394@newssvr14.news.prodigy.net>
	<faaepr$g2v$1@news3.zwoll1.ov.home.nl>
Message-ID: <_N3yi.46930$Um6.11415@newssvr12.news.prodigy.net>

Thanks. That looks interesting.

Jaap Spies wrote:
> W. Watson wrote:
>> I would hope Python is doing a lot of standard computations beyond 
>> arithmetic. Trig functions and more. Comments?
> 
> Try SAGE: http://www.sagemath.org/
> 
> Jaap
> 
> 
> Permanents are here forever.

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From jeff.fw at gmail.com  Thu Aug 30 14:29:03 2007
From: jeff.fw at gmail.com (Jeff)
Date: Thu, 30 Aug 2007 18:29:03 -0000
Subject: Creating a multi-tier client/server application
In-Reply-To: <1188479584.073309.297770@x40g2000prg.googlegroups.com>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
	<7xy7ft4fqg.fsf@ruckus.brouhaha.com>
	<1188479584.073309.297770@x40g2000prg.googlegroups.com>
Message-ID: <1188498543.184255.213940@i13g2000prf.googlegroups.com>

Wow, there's a lot to respond to here.  Thanks everyone for your
help.  I'll try to go in order.

askel: Thanks, I've looked at this a little bit before, but now I've
looked into it a little further.  Seems pretty cool, but also fairly
complex.  Have you used it before?

David: Sounds like a pretty interesting app.  Thanks for the in-depth
description.  I went and checked out Twisted PB, and it seems
awesome.  I may very well go with that.  How was writing code with
it?  I may also end up using py2app, but I'm also going to have to
support Windows, (p2exe, then), and possibly Linux.  Well, maybe not
Linux, but I'll probably be doing most of the development in Linux, so
I guess that counts.

Paul:  Again, I appreciate all of your input.  Responses below--

> It's relatively easier to get someone like that involved
> in a project than someone who can do good visual stuff AND write code,
> as is (to some extent) needed for a client side GUI.
Well, it's going to be just me (maybe some part-time help, but nothing
I can rely on), so either way, I'm writing the whole thing.

>> 1) More responsive and user-friendly interfaces
> 1) is true in principle and but a heck of a lot of apps don't really
> use the capability.  There's tons of crappy gui apps out there that
> could be done just as well with no client installation.
Granted.  But what I will be writing really will take a lot of extra
work to get even close to the level of usability needed on the web vs.
a desktop app.  And I'll try not to write a crappy GUI ;-)

> 2) I don't understand this part.  Sort = server side.
> Export/import/printing: upload and download files?  Depending on your
> requirements a little bit of browser scripting may be enough to handle
> this.
Sorting certainly doesn't have to be done on the server side--in fact,
in most cases I can think of where it would be useful for this app, it
wouldn't have to be--in which case it's more responsive.  Certainly
exporting, importing and printing can all be done through the web--
I've done this plenty of times.  But there is a huge amount of
flexibility (and, in the case of printing, guaranteed style/quality/
layout) to be gained on the desktop.

For #3, see my previous response to Bruno.  It was a poor choice of
wording on my part.

As for the AJAX--I'm going to need to use it *a lot* for the sake of
my clients.  They're used to (and very much want) usable interfaces
that really can't be made without it.  And even if I use it liberally,
it still won't be anywhere as usable as a desktop application.

All that said, I am most likely going to go with a desktop
application.  In reality, I will have to do whatever my client wants.
Thank you *very* much for all of your input--one of the first things I
have to do is make them a list of the pros and cons of web vs. desktop
apps--and this will help a lot.

vanrpeter-whatever: Thanks for the support :-)  What did you use for
networking?  What ORMs did you try (or did you skip them altogether?)
As for what I'm building--it's a personnel tracking/payroll system--
see my first post for a fuller description.  Hours will be... well, a
lot.  Our current contract is for 4 days a week for a year, but that's
for development--I'm not sure how much of a support contract they'll
want afterwards, or if they'll want further development (probably).

Once again, thanks everyone!



From sbassi at clubdelarazon.org  Sun Aug 19 16:41:58 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Sun, 19 Aug 2007 17:41:58 -0300
Subject: Python on Computation, Math and Statistics
In-Reply-To: <DU0yi.1286$Oo.199@newssvr17.news.prodigy.net>
References: <m_%xi.34088$2v1.7394@newssvr14.news.prodigy.net>
	<5irgvaF3oi5dpU2@mid.uni-berlin.de>
	<DU0yi.1286$Oo.199@newssvr17.news.prodigy.net>
Message-ID: <9e2f512b0708191341s2296eb6bj6f617fc5cc68e2a3@mail.gmail.com>

On 8/19/07, W. Watson <wolf_tracks at invalid.com> wrote:
> Google? What's that? Thanks. I like to get a insider's view when I know
> experts are out there. So now I ask a deeper question. Are there matrix
> computation libraries or even statistical (regression, factor analysis)
> libraries?

If you are so inclined you can use R functions from Python (look for R
and Python in your favorite search engine).

-- 
Sebasti?n Bassi (???????)
Diplomado en Ciencia y Tecnolog?a.
GPG Fingerprint: 9470 0980 620D ABFC BE63 A4A4 A3DE C97D 8422 D43D

From DustanGroups at gmail.com  Mon Aug 20 19:14:09 2007
From: DustanGroups at gmail.com (Dustan)
Date: Mon, 20 Aug 2007 23:14:09 -0000
Subject: Where we need to use Python ?
In-Reply-To: <mailman.20.1187622815.26576.python-list@python.org>
References: <1187596936.136499.200280@l22g2000prc.googlegroups.com>
	<5A5F2F2E-3B7D-4B5E-94A0-19F540C111B9@jedimindworks.com>
	<mailman.20.1187622815.26576.python-list@python.org>
Message-ID: <1187651649.911952.198920@57g2000hsv.googlegroups.com>

On Aug 20, 10:13 am, Wildemar Wildenburger <wilde... at freakmail.de>
wrote:
> Michael Bentley wrote:
> > On Aug 20, 2007, at 1:02 AM, gperu... at gmail.com wrote:
>
> >> And Is it a interpreted language or a programming language
> >> It comes in which category
>
> >> I very keen to know this please tell
>
> > [ open on suburban kitchen, Wife and Husband arguing ]
>
> > Wife: New Shimmer is a floor wax!
>
> > Husband: No, new Shimmer is a dessert topping!
>
> > [snip 50s-style add]
>
> > Spokesman: New Shimmer, for the greatest shine you ever tasted!
>
> Not the most to-the-point reply, but a very amusing one :).

Ack! Worst analogy ever!

But yes, amusing nonetheless.



From aleax at mac.com  Sat Aug 25 20:19:39 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 25 Aug 2007 17:19:39 -0700
Subject: Need a better understanding on how MRO works?
References: <mailman.295.1188079346.32294.python-list@python.org>
Message-ID: <1i3evke.1rwf8pn10k1h30N%aleax@mac.com>

Steven W. Orr <steveo at syslang.net> wrote:
   ...
>      name = 'C1'
>      nclass = new.classobj(name,(D1,),globals())
>      globals()[name] = nclass

Here, you're creating a VERY anomalous class C1 whose __dict__ is
globals(), i.e. the dict of this module object;

>      name = 'C2'
>      nclass = new.classobj(name,(D1,),globals())
>      globals()[name] = nclass

and here you're creating another class with the SAME __dict__;

>      globals()[name].m1 = m1replace

So of course this assignment affects the 'm1' entries in the dict of
both classes, since they have the SAME dict object (a la Borg) -- that
is, IF they're old-style classes (i.e. if D1 is old-style), since in
that case a class's __dict__ is in fact a dict object, plain and simple.

However, if D1 is new-style, then C1.__dict__ and C2.__dict__ are in
fact instances of <dictproxy> -- each with a copy of the entries that
were in globals() when you called new.classobj, but DISTINCT from each
other and from globals(), so that further changes in one (or globals)
don't affect globals (nor the other).

I guess this might be a decent interview question if somebody claims to
be a "Python guru": if they can make head or tails out of this mess, boy
the *ARE* a Python guru indeed (in fact I'd accord minor guruhood even
to somebody who can get a glimmer of understanding of this with ten
minutes at a Python interactive prompt or the like, as opposed to
needing to understand it "on paper" without the ability to explore:-).

Among the several "don't"s to learn from this: don't use old-style
classes, don't try to make two classes share the same dictionary, and
don't ask about MRO in a question that has nothing to do with MRO
(though I admit that was a decent attempt at misdirection, it wouldn't
slow down even the minor-guru in any appreciable way:-).


Alex


From rcdailey at gmail.com  Thu Aug 16 17:02:49 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Thu, 16 Aug 2007 16:02:49 -0500
Subject: Pass by reference or by value?
Message-ID: <496954360708161402x58faba47x7a6eae6e68f81d4@mail.gmail.com>

Hi,

I previously created a topic named "Pass by reference or by value" where I
inquired on how python's function parameters work. I received a lot of nice
responses, however I'm still confused on the topic. Note that I come from a
C++ background to Python, so any comparisons to C++ would be very helpful.

I ran a few tests. There's two tests in particular I wanted to show you
guys:
------------------------------------------------------------------------------------------------
myvar = []

def changeme( param ):
    param.append( "blah" )
    print param

changeme( myvar )

print myvar

The above code yields the following output:
['blah']
['blah']

This means that the list passed in was modified by the function.
------------------------------------------------------------------------------------------------
Now test case 2:

myvar = 4

def changeme( param ):
    param = 5
    print param

changeme( myvar )

print myvar

The above code yields the following output:
5
4

This means that the integer passed in was NOT modified by the function.
------------------------------------------------------------------------------------------------

Between these two tests, both types passed in are mutable objects. I'm
having trouble figuring out what mandates an object to be changed from
within a function versus not. What is happening in test case 2 to cause it
to not be modified?

Thanks for reading guys. Hopefully one day I'll understand this lol.
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From tdelaney at avaya.com  Tue Aug 28 20:02:44 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Wed, 29 Aug 2007 08:02:44 +0800
Subject: How to free memory ( ie garbage collect) at run time with
	Python2.5.1(windows)
In-Reply-To: <1i3hujk.ulsjt32wqtq0N%aleax@mac.com>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C084928@301081ANEX2.global.avaya.com>

Alex Martelli wrote:

> rfv-370 <robert.vergnes at yahoo.fr> wrote:
> 
>> have made the following small test:
>> 
>> Before starting my test my UsedPhysicalMemory(PF): 555Mb
>> 
>>>>> tf=range(0,10000000)    PF: 710Mb ( so 155Mb for my List)
>>>>> tf=[0,1,2,3,4,5]             PF: 672Mb (Why? Why the remaining
>>>>> 117Mb is not freed?) del tf                            PF: 672Mb
>>>>> (unused memory not freed)
> 
> Integer objects that are once generated are kept around in a "free
> list" against the probability that they might be needed again in the
> future (a few other types of objects similarly keep a per-type
> free-list, but I think int is the only one that keeps an unbounded
> amount of memory there).  Like any other kind of "cache", this
> free-list (in normal cases) hoards a bit more memory than needed, but
> results in better runtime performance; anomalous cases like your
> example can however easily "bust" this too-simple heuristic.

In particular, the *memory* for integer objects is kept around - the
free list will be as big as the total number of integer objects that
exist simultaneously (with a few caveats, but it's close enough). Small
integers are pre-created and cached, and don't use the free list - off
the top of my head, from -5..255 now to cover the entire bytes range,
plus a few negatives, but that depends on the version of python.

When you call range(), you create that number of integer objects
simultaneously, and so you have that amount of memory allocated for use
by other integers for the lifetime of the python process.

If on the other hand you only created one of those integers at a time
(e.g. by iterating over the result from an xrange() call) you would only
be using (continually re-using) a single entry in the free list in total
and the python memory usage would be much smaller.

Tim Delaney


From antroy at gmail.com  Tue Aug 21 06:12:50 2007
From: antroy at gmail.com (Ant)
Date: Tue, 21 Aug 2007 03:12:50 -0700
Subject: The folder a script is executed in
In-Reply-To: <5ivqm3F3rg15jU1@mid.individual.net>
References: <1187687436.476773.276550@22g2000hsm.googlegroups.com>
	<1187688437.358293.322460@22g2000hsm.googlegroups.com>
	<5ivqm3F3rg15jU1@mid.individual.net>
Message-ID: <1187691170.820193.99270@r34g2000hsd.googlegroups.com>

On Aug 21, 10:47 am, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Ant wrote:
...
> | print os.path.split(sys.argv[0])[0]
>
> $ cd tmp
> ~/tmp$ ../test.py
> ..
> ~/tmp$
>
> That's rather not what's intended. I'd try os.path.abspath(__file__)
> instead.

Fair point. On Win32 sys.argv[0] always seems to give the full path
rather than the relative path - hadn't realised it was different for
linux (?).

--
Ant...

http://antroy.blogspot.com/




From jensthiede at gmail.com  Tue Aug 14 16:50:38 2007
From: jensthiede at gmail.com (Jens Thiede)
Date: Tue, 14 Aug 2007 13:50:38 -0700
Subject: Metaclass v.s. Property function.
In-Reply-To: <Xns998998BD9112Fduncanbooth@127.0.0.1>
References: <1186835613.178733.81210@q75g2000hsh.googlegroups.com>
	<Xns998998BD9112Fduncanbooth@127.0.0.1>
Message-ID: <1187124638.215809.35350@19g2000hsx.googlegroups.com>

On Aug 11, 6:06 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Jens Thiede <jensthi... at gmail.com> wrote:
> > I don't like the property function, usable in the new-style classes,
> > because having to remember to manage a list of "foo = property(...)"
> > assignments just plain sucks, so I wrote a metaclass that does things
> > a little differently. Please have a look and tell me whether this is
> > useful or impractical. The metaclass is here:
> >http://pastebin.com/m5b06b571and some simple testcode is here:
> >http://pastebin.com/m382f2ae9. Notice the first line though.
>
> Here's something I posted a while back which lets you use property as a
> decorator:
>
>          class C(object):
>             def __init__(self, colour):
>                 self._colour = colour
>
>             @property.set
>             def colour(self, value):
>                 self._colour = value
>
>             @property.get
>             def colour(self):
>                 return self._colour
>
>             @property.delete
>             def colour(self):
>                 self._colour = 'none'
>
> See:http://groups.google.co.uk/group/comp.lang.python/browse_thread/threa...
>
> Whether you like that style is of course a matter of personal opinion.

Thanks, a very simple but a great and more "pythonic" idea.



From steve at holdenweb.com  Fri Aug 31 14:19:18 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 14:19:18 -0400
Subject: list index()
In-Reply-To: <1188551958.728836.137370@x35g2000prf.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<1188497498.3468.60.camel@dot.uniqsys.com>	<mailman.188.1188546300.28954.python-list@python.org>	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
	<1188551958.728836.137370@x35g2000prf.googlegroups.com>
Message-ID: <fb9m39$mf3$1@sea.gmane.org>

Paddy wrote:
> On Aug 31, 8:47 am, Erik Max Francis <m... at alcyone.com> wrote:
>> Hendrik van Rooyen wrote:
>>> weird this - maybe a native English speaker can comment -
>>> when I pronounce what fishermen do - it rhymes with roll,
>>> but when I am talking about the thing that lives under bridges
>>> and munches goats, the "O" sound is shorter, and more
>>> towards the back of my mouth.
>> Native English accents vary as well, but _roll_ rhymes with _troll_, not
>> _trawl_.  _Trawl_ would rhyme with _fall_, and _fall_ definitely doesn't
>> rhyme with _roll_.
>>
>> --
>> Erik Max Francis && m... at alcyone.com &&http://www.alcyone.com/max/
>>   San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
>>    I do not like work even when someone else does it.
>>     -- Mark Twain
> 
> I say the 'oll' in troll like the 'ol' in frolic, and pronounce roll
> and role similarly.
> 
> My accent is probably from the East Midlands of the UK, but is not
> pronounced.
> 
If your accent isn't pronounced how do we know what it sounds like?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From sjdevnull at yahoo.com  Mon Aug  6 18:16:01 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: Mon, 06 Aug 2007 15:16:01 -0700
Subject: Tkinter or wxpython?
In-Reply-To: <mailman.1550.1186099225.22759.python-list@python.org>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
Message-ID: <1186438561.923651.250640@r34g2000hsd.googlegroups.com>

On Aug 2, 8:00 pm, "wang frank" <f... at hotmail.co.jp> wrote:
> Hi,
>
> I want to build a GUI to execut python script. I found TKinter and
> wxpython. Which one is easier for a newbie? and which one is better?
>

If you want to have a native look and feel, I'd choose wxpython
(probably the Dabo builder for it).  If not, I'd usually take a web UI
over tkinter, except in special simple cases.  But it's really a
matter of taste.  Dabo does make UI construction a lot simpler for me
(and for a lot of other people.).



From kyosohma at gmail.com  Sun Aug 12 20:58:51 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 13 Aug 2007 00:58:51 -0000
Subject: wxPython - drawing without paint event
In-Reply-To: <mailman.1885.1186953122.22759.python-list@python.org>
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
	<1186738813.373909.96230@x35g2000prf.googlegroups.com>
	<1186796567.331348.42450@q3g2000prf.googlegroups.com>
	<5i5l0dF2lortaU1@mid.individual.net>
	<1186883988.585048.16590@m37g2000prh.googlegroups.com>
	<5i8befF3o5no1U1@mid.individual.net>
	<1186928595.014008.61950@b79g2000hse.googlegroups.com>
	<5i98bsF3nmbavU1@mid.individual.net>
	<1186951326.218981.17820@b79g2000hse.googlegroups.com>
	<mailman.1885.1186953122.22759.python-list@python.org>
Message-ID: <1186966731.768800.81620@x40g2000prg.googlegroups.com>

On Aug 12, 4:11 pm, Steve Holden <st... at holdenweb.com> wrote:
> 7stud wrote:
> > On Aug 12, 2:20 pm, Bjoern Schliessmann <usenet-
> > mail-0306.20.chr0n... at spamgourmet.com> wrote:
> >> But any suggestions what's
> >> better for a beginner? The (incomplete) tutorial surely not.
>
> > Another GUI toolkit.
>
> Well if all you have to offer is fatuous advice you would be helping
> people more by keeping quiet. wxPython is a more-than-adequate GUI
> toolkit, as has been proved in many successful projects.
>
> What other toolkits have you used, and to what effect, and on what size
> of program? I suspect you are not particularly well-qualified to be
> answering this question in the first place, although as always you are
> entitled to your opinion. It's just that you appear to have an inflated
> value of its worth.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------

If you've followed 7Stud's posts, you'll note that he/she is always
short and mildly to extremely abrupt or rude. Robin Dunn has written
on multiple occasions on the wxPython list about the trouble's they
had organizing the book with the publisher.

While the book does have issues, it is better (in my opinion) than the
only published Tkinter book, although both books are now outdated.
However, I have found that with practice, I can write a fairly complex
GUI front-end with wxPython in only a couple of hours.

As with all programming, if you don't practice, you won't learn.

Mike



From evan at yelp.com  Sun Aug  5 13:33:22 2007
From: evan at yelp.com (Evan Klitzke)
Date: Sun, 5 Aug 2007 10:33:22 -0700
Subject: Best programs written completly in Python
In-Reply-To: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
Message-ID: <cfb58d850708051033mef31512qc957cd96df4eca8d@mail.gmail.com>

On 8/5/07, Franz Steinh?usler <franz.steinhaeusler at gmx.at> wrote:
> Hello NG,
>
> wWhat are the best programs in your opinion, written entirly
> in pyhton, divided into categories like:
> a) Games
> b) Utilities/System
> c) Office
> d) Web/Newsreader/Mail/Browser

I might be a little biased, but surely Yelp.com is the best "program"
written entirely in Python ;-)

Other really cool Python projects are Launchpad
(https://launchpad.net/) and Trac (http://trac.edgewall.org/). And of
course most Linux desktop distributions (especially Ubuntu and
Redhat/Fedora) have a huge number of small components that rely on
Python entirely or to put together the frontend. Great examples of
this are Bazaar VCS and the Anaconda installer.

The Twisted project isn't a program per se, but it's written in Python
and is really incredible as well.

Google's Mondrian code review system is written in Python and looks
really amazing. I just wish I could try it out :-)

-- 
Evan Klitzke <evan at yelp.com>

From nick at craig-wood.com  Fri Aug 10 10:30:04 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 10 Aug 2007 09:30:04 -0500
Subject: High performance binary data
References: <1186705614.728812.284460@j4g2000prf.googlegroups.com>
Message-ID: <slrnfbotbv.vkb.nick@irishsea.home.craig-wood.com>

Steve <steve.morin at gmail.com> wrote:
>  I want to ready binary data from a udp socket effeciently as possible
>  in python.  I know of the struct package but do people have any tips
>  when dealing with binary data in python?  Is there a library or api
>  that is faster when dealing with binary data. I am looking for a any
>  one with experience or ideas on the subject.  Pointers any one?

Check out construct: http://construct.wikispaces.com/

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


From jantod at gmail.com  Wed Aug 15 04:08:45 2007
From: jantod at gmail.com (Janto Dreijer)
Date: Wed, 15 Aug 2007 08:08:45 -0000
Subject: Fast kNN from python
In-Reply-To: <1187119667.134926.253150@22g2000hsm.googlegroups.com>
References: <1187086584.076990.260680@r34g2000hsd.googlegroups.com>
	<1187119667.134926.253150@22g2000hsm.googlegroups.com>
Message-ID: <1187165325.841942.136620@a39g2000hsc.googlegroups.com>

On Aug 14, 9:27 pm, Sean Davis <seand... at gmail.com> wrote:
> On Aug 14, 6:16 am, Janto Dreijer <jan... at gmail.com> wrote:
>
>
>
> > Hi!
>
> > I am looking for a Python implementation or bindings to a library that
> > can quickly find k-Nearest Neighbors given an arbitrary distance
> > metric between objects. Specifically, I have an "edit distance"
> > between objects that is written in Python.
>
> > I haven't looked at the methods in detail but I think I'm looking for
> > one of the data structures listed onhttp://en.wikipedia.org/wiki/Metric_trees
> > (i.e. vp-trees, cover trees, m-trees or bk trees). But I might be
> > wrong. An approximatekNNwould also work.
>
> > If there doesn't exist such an implementation yet, any advice on a
> > library I can wrap myself would also be appreciated.
>
> > Thanks!
> > Janto
>
> Have you looked at using Rpy and R?  There are probably severalknn
> implementations that then become accessible to you (although I haven't
> checked recently).
>
> Sean

Interesting. I have not looked at that. I can't really find an R
package that does what I want, so any suggestions are appreciated.

Janto



From apt.shansen at gmail.com  Thu Aug  9 22:26:23 2007
From: apt.shansen at gmail.com (Stephen Hansen)
Date: Thu, 9 Aug 2007 19:26:23 -0700
Subject: wxPython before MainLoop
In-Reply-To: <13bnh5bs4b9h427@corp.supernews.com>
References: <13bl9a75laqcm70@corp.supernews.com>
	<13bnh5bs4b9h427@corp.supernews.com>
Message-ID: <7a9c25c20708091926t1c275728kef4e30877840024@mail.gmail.com>

On 8/9/07, [david] <david at nospam.spam> wrote:
>
> I'm disappointed that I didn't get a wxPython solution.
>
> If the only way to get wxPython to correctly handle
> this simple task is to code around it, I don't think
> wxPython is really ready for Windows.


A thread *is* basically the right answer, though; so why does wxPython need
an "answer"? Python has one.

Alternatively, let the GUI load (and don't do the long-running-task) and
then do the long running task in an idle handler within the GUI. A bit at a
time.

Alternatively, from within the long-running-task, regularly do:

   if myApp.Pending():
       myApp.Dispatch()

That'll handle any pending UI events (so the main UI is responsive). But you
need to call it regularly during your main task-- if you don't want a
separate thread.

Is there a better place to ask?


The wxPython mailing list. http://wxpython.org/maillist.php

--5
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From rbriski at gmail.com  Tue Aug  7 12:25:32 2007
From: rbriski at gmail.com (Bob B.)
Date: Tue, 07 Aug 2007 09:25:32 -0700
Subject: Adding a list of descriptors to a class
Message-ID: <1186503932.110835.293640@x40g2000prg.googlegroups.com>

I've been playing with descriptors lately.  I'm having one problem I
can't seem to find the answer to.  I want to assign a descriptor to a
list of attributes.  I know I should be able to add these somewhere in
the class's __dict__, but I can't figure out where.  Here's some code:

class MyDesc(object):
  def __init__(self, name=None, initVal=None):
    self.name = name
    self.value = initVal

  def __get__(self, obj, objtype):
    // Do some stuff
    self.value = "blah"
    return self.value

class MyClass(object):
  attributes = ('attr1', 'attr2')
  for attr in attributes:
    exec ("%s=MyDesc('%s')") % (attr, attr)

  // More stuff in the class

Ok, that "exec" is an ugly hack.  There's gotta be someway to plop
this straight into the class's __dict__ without doing that, but when I
try adding self.__class__.__dict__[attr] = MyDesc(attr) in MyClass's
__init__ method, I get the error: "TypeError: 'dictproxy' object does
not support item assignment"

Any ideas?

Thanks,
Bob



From zyzhu2000 at gmail.com  Sat Aug 18 21:42:50 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Sun, 19 Aug 2007 01:42:50 -0000
Subject: How to call module functions inside class instance functions?
In-Reply-To: <1187486010.565278.264150@l22g2000prc.googlegroups.com>
References: <1187484041.838615.259980@e9g2000prf.googlegroups.com>
	<1187486010.565278.264150@l22g2000prc.googlegroups.com>
Message-ID: <1187487770.786333.69590@q3g2000prf.googlegroups.com>

On Aug 18, 8:13 pm, Zentrader <zentrad... at gmail.com> wrote:
> On Aug 18, 5:40 pm, beginner <zyzhu2... at gmail.com> wrote:
>
>
>
>
>
> > Hi Everyone,
>
> > I have encountered a small problems.  How to call module functions
> > inside class instance functions? For example,  calling func1 in func2
> > resulted in a compiling error.
>
> > "my module here"
>
> > def func1():
> >      print "hello"
>
> > class MyClass:
> >    def func2():
> >          #how can I call func1 here.
> >          func1() #results in an error
>
> > Thanks,
> > Geoffrey
>
> You might want to check one of the online tutorials about how to code
> classes.  Google or look at "Learning Python" herehttp://www.python-eggs.org/
> def func1():
>      print "hello"
>
> class MyClass:
>    def func2(self):
>          #how can I call func1 here.
>          func1() #results in an error
>
> MC= MyClass()
> MC.func2()- Hide quoted text -
>
> - Show quoted text -

Thanks for your help. The missing "self" is a typo of mine. It is not
the problem I am encountering. Sorry for posting the wrong code.



From bstevens at rock.com  Wed Aug  8 20:51:21 2007
From: bstevens at rock.com (bstevens at rock.com)
Date: Wed, 08 Aug 2007 17:51:21 -0700
Subject: EXCELLENT advice on "foreign brides"
Message-ID: <1186620681.289058.292820@w3g2000hsg.googlegroups.com>

You've seen them a million times: those fascinating web sites with
thousands of pictures of foreign women, many of them incredibly
beautiful, and every one of them saying she is "looking for a kind,
gentle man who will love me," and likes "cooking, sewing, and making a
cozy home" and "walking and holding hands on the beach at sunset."

No, this is NOT about "mail order brides." There is NO SUCH THING as a
mail order bride. That's a total fiction.

But these women ARE real, and would welcome the chance to marry
a halfway decent man. This IS about how to find and meet someone
you can be happy with, and find that love and companionship you've
always longed for. Please take a minute to visit the website; it
explains everything.

http://www.foreignbridesbook.com

Bill S.



From QJing.Li at gmail.com  Fri Aug 17 20:07:50 2007
From: QJing.Li at gmail.com (math2life)
Date: Sat, 18 Aug 2007 00:07:50 -0000
Subject: How to setup pyOpenGL3.0.a6 for window xp?
Message-ID: <1187395670.267971.88750@q4g2000prc.googlegroups.com>

Hi,
I've already download the pyOpenGL3..0.a6 for python2.4 and installed
python2.4,

Is it necessary to install OpenGL? And if need,  which version of
OpenGL should be
installed?

Thanks!



From apetresc at uwaterloo.ca  Thu Aug  2 13:00:42 2007
From: apetresc at uwaterloo.ca (Adrian Petrescu)
Date: Thu, 02 Aug 2007 10:00:42 -0700
Subject: File access
In-Reply-To: <1186072898.405831.105670@e16g2000pri.googlegroups.com>
References: <1186072898.405831.105670@e16g2000pri.googlegroups.com>
Message-ID: <1186074042.024080.159420@e16g2000pri.googlegroups.com>

On Aug 2, 12:41 pm, JD <Jiandong... at gmail.com> wrote:
> Hi,
>
> What I am trying to do is to run a subprocess on another machine using
> subprocess.Popen, this subprocess contuinue writing something into a
> file when it is runing.
>
> After submit this subprocess, I tried to open the file and readlines()
> in the loop (with a delay) in the loop) when the subprocess was
> runing.
>
> The problem is I could not get anything untill the subprocess
> finished.
>
> I also tried to run another python programm when the subprocess is
> runing, I could get what I want.
>
> Does anyone know why? Thanks!
>
> JD

Could the problem be that the subprocess only flushes the output
buffer when it terminates, and so until the subprocess "finishes", as
you say, the file is empty because the data is still in the buffer?
Trying throwing some flushes into the code and see if it helps.

Or am I misunderstanding your question?



From kyosohma at gmail.com  Fri Aug  3 09:08:28 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 03 Aug 2007 06:08:28 -0700
Subject: How to create python script which can create csv we file with
	relationship
In-Reply-To: <1186141530.243539.6370@q75g2000hsh.googlegroups.com>
References: <1186141530.243539.6370@q75g2000hsh.googlegroups.com>
Message-ID: <1186146508.251658.19020@i13g2000prf.googlegroups.com>

On Aug 3, 6:45 am, Sonu <patelkun... at gmail.com> wrote:
> hello,
> i need to create script
> that can create a csv file as i want
> for example i have two table in database that are person ,country
> if i want to create csv file to person,then wht to do ,,
> how to connect database,how to create csv of interrelated field
> eg :in person table :country_id (which is primary key of country table)

Did you try google? Python has a csv module: http://docs.python.org/lib/module-csv.html

Mike



From kyosohma at gmail.com  Wed Aug 29 09:31:57 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 29 Aug 2007 06:31:57 -0700
Subject: Getting subprocesses to be hidden on Windows
In-Reply-To: <1188324798.742700.173970@w3g2000hsg.googlegroups.com>
References: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
	<YtCdnYoSetVu10nbnZ2dnUVZ_oDinZ2d@comcast.com>
	<1188324798.742700.173970@w3g2000hsg.googlegroups.com>
Message-ID: <1188394317.487938.84100@d55g2000hsg.googlegroups.com>

On Aug 28, 1:13 pm, geoffbache <geoff.ba... at pobox.com> wrote:
> On 28 Aug, 18:18, Larry Bates <larry.ba... at websafe.com> wrote:
>
>
>
> > geoffbache wrote:
> > > Hi,
>
> > > As part of my efforts to write a test tool that copes with GUIs
> > > nicely, I'm trying to establish how I can start a GUI process on
> > > Windows that will not bring up the window. So I try to hide the window
> > > as follows:
>
> > > info = subprocess.STARTUPINFO()
> > > info.dwFlags |= subprocess.STARTF_USESHOWWINDOW
> > > info.wShowWindow = subprocess.SW_HIDE
>
> > > proc = subprocess.Popen(..., startupinfo=info)
>
> > > This works, in a way, but doesn't work recursively. I.e. if the
> > > started process itself starts a window, that second window will not be
> > > hidden. This even applies to dialog boxes within the application. So
> > > instead of a lot of windows popping up I now get a lot of disembodied
> > > dialogs appearing, which is a slight improvement but not much.
>
> > > Also, certain processes (e.g. tkdiff) seem to ignore the directive to
> > > be hidden altogether.
>
> > > This is dead easy on UNIX with virtual displays like Xvfb. Can someone
> > > shed any light if it's possible on Windows from python?
>
> > > Regards,
> > > Geoff Bache
>
> > While I'm not entirely sure I understand what you want, I think you can
> > accomplish it by using win32CreateProcess instead of subprocess.  You can run
> > the application minimized or perhaps in a REALLY small window.  If you have
> > modal dialog boxes, I don't think you can do anything as they don't run in the
> > parent windows frame but rather outside (I could be wrong about this).
>
> > -Larry
>
> Hi Larry,
>
> I don't know if that would help. I've tried running minimized from the
> command line as
> suggested by Mike and that has the same issue (child windows and
> dialogs don't get minimized)
> So the question is moving away from how to technically achieve this in
> Python to whether
> Windows even supports it...
>
> Geoff

I just discovered Tim Golden's recipe for running processes minimized:
http://tgolden.sc.sabren.com/python/wmi_cookbook.html#run-process-minimised

I haven't tested it, but his stuff usually works. However, it may have
the same issues with modal dialogs that my other suggestion had.

Mike



From vedrandekovic at v-programs.com  Tue Aug  7 14:02:37 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Tue, 07 Aug 2007 11:02:37 -0700
Subject: distutils
In-Reply-To: <46b8adc7$0$240$e4fe514c@news.xs4all.nl>
References: <1186489676.042901.236140@w3g2000hsg.googlegroups.com>
	<46b8adc7$0$240$e4fe514c@news.xs4all.nl>
Message-ID: <1186509757.778884.39230@19g2000hsx.googlegroups.com>

On 7 kol, 19:37, Irmen de Jong <irmen.NOS... at xs4all.nl> wrote:
> vedrandeko... at v-programs.com wrote:
> > Hello again,
>
> > Is there any patch for python "distutils", for this
>
> >>>> from distutils import log,dir_util
> > ImportError: cannot import name log
>
> > Regards,
> > Vedran
>
> Are you sure you haven't written a module yourself called distutils.py ?
> (that one will hide the standard distutils module)
>
> --irmen


I was search for all distutils files and folders and I'am sure there
is no distutils except "c:\Python24\Lib\distutils"

Regards,
Vedran



From jstroud at mbi.ucla.edu  Thu Aug 23 04:21:11 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 23 Aug 2007 08:21:11 GMT
Subject: Raw strings to normal strings conversion?
In-Reply-To: <1187851660.209024.59860@l22g2000prc.googlegroups.com>
References: <1187851660.209024.59860@l22g2000prc.googlegroups.com>
Message-ID: <Xrbzi.21051$eY.3412@newssvr13.news.prodigy.net>

Nagarajan wrote:
> Is there a way by which I could obtain normal string form of a raw
> string.
> XML CDATA is returned as raw string. But I need the string to actually
> escape special chars.
> 
> Any idea?
> 

This doesn't seem clear. Perhaps an example of what you get and what you 
want it converted to.

In the meantime, see if urllib.unquote() doesn't do what you need.

James


From nospam at myisp.ifyouplease.com  Tue Aug 28 13:06:29 2007
From: nospam at myisp.ifyouplease.com (Neil Wallace)
Date: Tue, 28 Aug 2007 18:06:29 +0100
Subject: Jython 2.2 on Ubuntu
Message-ID: <-YOdnW_k3p6Fy0nb4p2dnAA@bt.com>

Hi all,

I am a novice Python/Jython programmer, and Ubuntu user.

Ubuntu still only supports only version 2.1 of Jython. I have used the 
GUI installer of Jython 2.2, and installed it to the default 
/root/jython2.2 directory. The install went without issues.

However, typing ............jython --version
in a teminal still gives me   ........ Jython 2.1 on java (JIT: null)

What else do I need to do?

regards
Neil.

p.s. I posted this to the jython group hosted by sourceforge, but it 
bounced. :-(


From reubendb at gmail.com  Mon Aug  6 18:26:53 2007
From: reubendb at gmail.com (reubendb)
Date: Mon, 06 Aug 2007 22:26:53 -0000
Subject: Redirecting stderr to null and revert
Message-ID: <1186439213.076470.109060@d55g2000hsg.googlegroups.com>

Hello,
I have some function that output too much stuff to stderr when called,
and I have no control over the function itself. So I thought as a
workaround, I redirect stderr to /dev/null before calling that
function, and then revert the stderr back after calling that
function.
I have something like this:

def nullStderr():
  sys.stderr.flush()
  err = open('/dev/null', 'a+', 0)
  os.dup2(err.fileno(), sys.stderr.fileno())

def revertStderr():
  sys.stderr = sys.__stderr__

Then when calling the function, I want to do:
nullStderr()
noisyFunction(foo, bar)
revertStderr()

The problem is the "revertStderr()" doesn't work, ie. I still get no
stderr back after calling it (stderr still redirects to /dev/null). I
want stderr back so that when the script fails in different places
later I can get error messages. What am I missing here ? Thanks a lot
for any help.

RDB



From david at asdf.asdf  Sun Aug 26 20:48:27 2007
From: david at asdf.asdf (bambam)
Date: Mon, 27 Aug 2007 10:48:27 +1000
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>	<fakrtb$2ts$1@panix3.panix.com><87tzqpew22.fsf@wilson.homeunix.com>	<fal3cv$bi2$1@panix3.panix.com><87tzqp77my.fsf@wilson.homeunix.com>	<7xy7g1if24.fsf@ruckus.brouhaha.com><87mywh717i.fsf@wilson.homeunix.com>
	<mailman.240.1187950454.32294.python-list@python.org>
Message-ID: <13d47qr5t7kref4@corp.supernews.com>

> virtually the only ones that feel the need to rub our nationality into

I'd always assumed (I never spent much time) that Germans were
another culture that had the habit of greeting groups on entrance.

Australians, English, and most of North America just don't have
that habit.

Steve.

"Wildemar Wildenburger" <wildemar at freakmail.de> wrote in message 
news:mailman.240.1187950454.32294.python-list at python.org...
> Torsten Bronger wrote:
>> Hall?chen!
>>
>>
> Yes, you're German. Have you ever noticed that (we) Germans are virtually 
> the only ones that feel the need to rub our nationality into everyones 
> faces? ;)
>
>
>> Paul Rubin writes
>>
>>> TeX/LateX have been around forever and are well established
>>> standards, as awful as they are.  Why do we want ANOTHER markup
>>> language?
>>>
>> Well, because they are awful.  ;-)  I don't see that there is a
>> bunch of already existing projects, in fact, I don't see anyone
>> challenging LaTeX at all.  However, competition is a good thing, and
>> I think there are enough aspects about LaTeX that can be done better
>> so that this project is worth being done.
>>
> Well there is ConTeXt <URL:http://wiki.contextgarden.net/>. I've never 
> actually used it, but from reading the docs I deem it a very attractive 
> alternative to LaTeX.
>
> /W 




From hober0 at gmail.com  Wed Aug  1 21:11:15 2007
From: hober0 at gmail.com (Edward O'Connor)
Date: Wed, 01 Aug 2007 21:11:15 -0400
Subject: Emacs + python
References: <ak8x8v2udo.fsf@googlemail.com>
Message-ID: <86ps26zqoc.fsf@rakim.cfhp.org>

> Could anyone put me on the right track to developing Python with emacs
> please : modes to consider, debugging etc hopefully all within emacs.

Personally, I prefer the python.el that ships with Emacs 22 to the
python-mode.el from python.org. It seems more like other Emacs major
modes.


Ted

-- 
Edward O'Connor
hober0 at gmail.com

Ense petit placidam sub libertate quietem.



From ars at iki.fi  Wed Aug  1 03:15:36 2007
From: ars at iki.fi (Antti Rasinen)
Date: Wed, 1 Aug 2007 10:15:36 +0300
Subject: removing redundant elements in a dictionary
In-Reply-To: <46B002EB.1080201@al.com.au>
References: <46B002EB.1080201@al.com.au>
Message-ID: <FDFB7C76-4C75-4026-9902-69043D08659F@iki.fi>


On 2007-08-01, at 06:50, Astan Chee wrote:

> Hi,
> I have a dictionary which looks something like this:
>
> elem = {"co":[1,2,3],"cp":[3,2,1],"pp":[5,6,7],"cl":[1,2,3],"qw": 
> [6,7,8],"qa":[8,7,6]}
>
> what Im trying to do is find all keys in the list that have the  
> same value and delete those (except one); thereby removing all  
> redundant keys so that the above dict will look like this:
>
> elem = {"co":[1,2,3],"pp":[5,6,7],"qa":[8,7,6]}
>
> my code so far looks like this:
>
> for out1 in elem.keys():
>     for out2 in elem.keys():
>         if out1 != out2:
>             elem[out1].sort()
>             elem[out2].sort()
>             if elem[out1] == elem[out2]:
>                 del elem[out1]
>
> This returns in a KeyError exception when sorting. What am I  
> missing here?

Consider a dict {'a': [1], 'b': [1], 'c': [1]}.

First time we reach the innerloop, out1 == 'a'. Then we iterate over  
the list ['a', 'b', 'c'].

'a' is skipped. At 'b', we remove 'a' from the dictionary. And then  
it all goes wrong.

The last time we go through the inner loop, out1 is still 'a' -- an  
element which does not exist in the dictionary anymore. Then your  
attempts to reference it fail at both the sorting and comparison  
stages. You should break out of the inner loop immediately after  
you've deleted the item or delete out2 instead..

Furthermore, the algorithm is somewhat inefficient due to the fact  
that it sorts the lists O(n^2) times when you only need to do them n  
times. If your data allows it, you might like to use sets instead of  
lists. This would avoid the need to sort the lists.

However, here is a very quick version that works in my tests:
for out_list in elem.values():
     out_list.sort()

for out1 in elem.keys():
     for out2 in elem.keys():
         if out1 != out2 and elem[out1] == elem[out2]:
             del elem[out1]
             break

There are probably several ways to improve on that, however.

-- 
[ ars at iki.fi <*> Antti Rasinen ]

"Pay the man his wage, he's making paper to fuel the Information Age."


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From stefan.behnel-n05pAM at web.de  Thu Aug 30 08:37:10 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Thu, 30 Aug 2007 14:37:10 +0200
Subject: SAXParseException: not well-formed (invalid token)
In-Reply-To: <fb6alc$pfj$1@news.cesga.es>
References: <fb6alc$pfj$1@news.cesga.es>
Message-ID: <46D6B9F6.2010402@web.de>

Pablo Rey wrote:
>     I am getting the following error with a XML page:
> 
>>   File "/home/prey/RAL-CESGA/bin/voms2users/voms2users.py", line 69,
>> in getItems
>>     d = minidom.parseString(xml.read())
>>   File "/usr/lib/python2.2/site-packages/_xmlplus/dom/minidom.py",
>> line 967, in parseString
>>     return _doparse(pulldom.parseString, args, kwargs)
>>   File "/usr/lib/python2.2/site-packages/_xmlplus/dom/minidom.py",
>> line 954, in _doparse
>>     toktype, rootNode = events.getEvent()
>>   File "/usr/lib/python2.2/site-packages/_xmlplus/dom/pulldom.py",
>> line 265, in getEvent
>>     self.parser.feed(buf)
>>   File "/usr/lib/python2.2/site-packages/_xmlplus/sax/expatreader.py",
>> line 208, in feed
>>     self._err_handler.fatalError(exc)
>>   File "/usr/lib/python2.2/site-packages/_xmlplus/sax/handler.py",
>> line 38, in fatalError
>>     raise exception
>> xml.sax._exceptions.SAXParseException: <unknown>:553:48: not
>> well-formed (invalid token)
> 
> 
>> def getItems(page):
>>     opener =urllib.URLopener(key_file=HOSTKEY,cert_file=HOSTCERT) ;
>>     try:
>>        xml = opener.open(page)
>>     except:
>>        return []
>>
>>     d = minidom.parseString(xml.read())
>>     items = d.getElementsByTagName('item')
>>     data = []
>>     for i in items:
>>        data.append(getText(i.childNodes))
>>
>>     return data
> 
>     The page is
> https://lcg-voms.cern.ch:8443/voms/cms/services/VOMSCompatibility?method=getGridmapUsers
> and the line with the invalid character is (the invalid character is the
> final ? of Universit?):
> 
> <item>/C=BE/O=BEGRID/OU=Physique/OU=Univesit? Catholique de
> Louvain/CN=Roberfroid</item>
> 
> 
>     I have tried several options but I am not able to avoid this
> problem. Any idea?.

Looks like the page is not well-formed XML (i.e. not XML at all). If it
doesn't specify an encoding (<?xml encoding="..."?>), you can try recoding the
input, possibly decoding it from latin-1 and re-encoding it as UTF-8 before
passing it to the SAX parser.

Alternatively, tell the page authors to fix their page.

Stefan


From goldtech at worldpost.com  Sat Aug  4 15:58:45 2007
From: goldtech at worldpost.com (goldtech)
Date: Sat, 04 Aug 2007 12:58:45 -0700
Subject: Submit web form only client-side with Python? COM?
Message-ID: <1186257525.483524.5570@j4g2000prf.googlegroups.com>

Say I have have an HTML form , the user hits the submit button and I
what text they enetered into a HTML form field is written to a file.

But I don't have PHP, JAVA the usual client or server sided layers to
write the data to a file, and I'm not to keen on JavaScript. Note: I
can not add or download anything, I must use what I have.

But I have Python 2.1 and I'm on a WinXP desktop with the win32.com,
and usual active-x objects, MS-Office ect - what'd normally locally on
an XP work station.

So I can present the user with an HTML form in it - but how can I
write the form data to a local file on my work station?

If there isn't a web form way, could there be another way to get a box
to come up with input fields with the capability to submit the data to
a file?

Thanks,
Lee G.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Aug 13 03:59:07 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 13 Aug 2007 09:59:07 +0200
Subject: Module imports during object instantiation
In-Reply-To: <mailman.1845.1186783217.22759.python-list@python.org>
References: <mailman.1845.1186783217.22759.python-list@python.org>
Message-ID: <46c00f2d$0$298$426a34cc@news.free.fr>

Ritesh Raj Sarraf a ?crit :
> Hi,
> 
> I've been very confused about why this doesn't work. I mean I don't see any
> reason why this has been made not to work.
> 
> class Log:
> 
>     def __init__(self, verbose, lock = None):
> 
>         if verbose is True:

Don't use an identity test here. There are quite a lot of values that 
eval to either True or False in a boolean context without being the True 
or False objects.

>             self.VERBOSE = True
>         else: self.VERBOSE = False

Also, this test is rather dumb - in fact you just don't need any test:

           self.VERBOSE = bool(verbose)

> 
>         if lock is None or lock != 1:
>             self.DispLock = False
>         else:
>             self.DispLock = threading.Lock()
>             self.lock = True
> 
>         if os.name == 'posix':
>            self.platform = 'posix'
>            self.color = get_colors()
> 
>         elif os.name in ['nt', 'dos']:
>             self.platform = 'microsoft'
>             
>             try:
>                 import SomeModule
>             except ImportError:
>                 self.Set_Flag = None
>             
>             if self.Set_Flag is not None:
>                 self.color = SomeModule.get_colors_windows()
> 
>         else:
>             self.platform = None
>             self.color = None
> 
> When I create an object the "import" part never gets executed. Is there a
> reason behind it ?

what does "print os.name" yields ?

> I mean I'd like to keep my class as independent as I want. So that when
> later I need to use it somewhere else, I don't need to know if it depends
> on any modules.
 >

Then pass the module to the initializer. Python's modules are objects...



From gregpinero at gmail.com  Mon Aug 20 14:37:43 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Mon, 20 Aug 2007 18:37:43 -0000
Subject: Handwriting Recognition
In-Reply-To: <mailman.6.1187616526.26576.python-list@python.org>
References: <mailman.6.1187616526.26576.python-list@python.org>
Message-ID: <1187635063.531103.7610@d55g2000hsg.googlegroups.com>

On Aug 20, 9:00 am, "Ian Dickinson" <I_Dickin... at bitwise.co.uk> wrote:
> However a friend of mine who is a special educational needs teacher was asking me if I could write some handwriting recognition software for her, which would allow here pupils to write their input directly on a graphics tablet and then have this input converted to a text sting for further processing. The handwriting would be distinct letters either upper or lower case but not joined up writing.  I would like to help out here as I think this is a valuable  and worthwhile area of education so has anyone out there got any advice that could help me out.

Sure you just use the handwriting recognition library:

import handwriting
...

http://docs.python.org/lib/module-handwriting.html

ha ha, I kid, I kid.

I don't think this is an easy problem to solve.  You'd probably want
Python to be a wrapper around whatever hand-writing recognition
software you find or buy.  I know handwriting recognition software can
read the hand-writing on checks, so that may be a starting point.

Alternatively, Tesseract is an up and coming open source OCR engine.
Perhaps you could build on that to do limited handwriting recognition:
http://code.google.com/p/tesseract-ocr/

And here's a wikipedia entry on the subject to familiarize yourself
with it a bit:
http://en.wikipedia.org/wiki/Handwriting_recognition

Finally, perhaps you could buy a graphics tablet that already offers
handwriting recognition and go from there.

-Greg



From theller at ctypes.org  Fri Aug 31 11:55:23 2007
From: theller at ctypes.org (Thomas Heller)
Date: Fri, 31 Aug 2007 17:55:23 +0200
Subject: Fatal Python error using ctypes & python exceptions
In-Reply-To: <1188571040.183691.20910@22g2000hsm.googlegroups.com>
References: <1188571040.183691.20910@22g2000hsm.googlegroups.com>
Message-ID: <fb9dlc$r5c$1@sea.gmane.org>

mmacrobert schrieb:
> Hi Everyone,
> I've created a 'C' dll that is accessed via ctypes library containing
> a bunch of functions. I've successfully been able to use the
> functions. However, I would like to throw python exceptions from some
> of them.
> 
> I throw them using: ::PyErr_SetString(::PyExc_RuntimeError,
> theErrorString);
> 
> I crash the console when this function is invoked in the 'C' domain. I
> get an error stating:
> 
> Fatal Python error: PyThreadState_Get: no current thread
> 
> when the calling code in python is:
> 
> try:
>     cdll.MyDll.ThrowingFunction()
> except:
>     print "An error has occurred"
> 
> The dll is just a plain win32 'C' dll, built with an MS compiler. How
> do I throw python exceptions correctly? Is there some kind of "init"
> function that needs to be called?

For libraries loaded with cdll.MyDll or CDLL("MyDll") ctypes releases
the GIL before calling the function, and reacquires the GIL afterwards.

This has the consequence that you cannot use any Python api functions
inside the dll functions (because there is no ThreadState, just like
the error message says).

If you want to throw Python exceptions in the dlls functions, or use
other Python apis, you must use the 'Python calling convention'.
For this calling convention the GIL is NOT released and reacquired,
but after the function call returns PyErr_Occurred() is called and an
exception raised in the calling code - exactly what you want.

The 'Python calling convention' is used when you load the library
with pydll.MyDll or PyDLL("MyDll").

Additional remark:  You can have functions with different calling
conventions in the same dll, just load it with different library loaders
and you're fine.

Thomas



From mccredie at gmail.com  Wed Aug 22 13:52:47 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Wed, 22 Aug 2007 10:52:47 -0700
Subject: porting vc++ project to python?
In-Reply-To: <46cc611f$0$25500$ba620dc5@text.nova.planet.nl>
References: <46cc611f$0$25500$ba620dc5@text.nova.planet.nl>
Message-ID: <9e95df10708221052q10a38f90v15ce2696e34574dd@mail.gmail.com>

> i have a very large project in visual studio2005->visual c++ in windowsxp.
> i'd like to port it, or my next project,  over to python.
> is this possible without rewriting all my code?
> are there multiple options to do this?
> my project is so large, that entirely rewriting it
> is actually no option.

You have a couple of options, but it really depends on the structure
of your program.

Option 1: You could encapsulate the important portions of your code in
DLLs and access them from python using the ctypes module.

Option 1b: You could encapsulate the important portions of your code
as COM DLLs and access them from win32com.

Option 2: You could turn your code into python extensions (DLL):
http://docs.python.org/ext/

Option 3: You could rewrite portions of your code in python and access
it from VC++: same as before - http://docs.python.org/ext/

It all depends on how your project is structured, and what you
consider to be the most difficult part to convert. If your app has a
complex user interface and that is the most difficult part to convert
then option 3 is probably best. If the code is well encapsulated and
the user interface will be easy to rewrite then options 1 or 2 will
work best. It is probably best to stay away from 1b unless portions of
your stuff already exist as COM DLLs. If you do have COM DLLs however,
accessing them from Python is very easy.

Matt


From horpner at yahoo.com  Tue Aug 21 09:53:08 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 21 Aug 2007 13:53:08 GMT
Subject: reading a line in file
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>
	<2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx>
	<2dc0c81b0708201207p7f83f2e0l6de15fd70be252a5@mail.gmail.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2B6@efmailx>
	<46C9F561.50405@jayloden.com>
	<mailman.25.1187640919.32294.python-list@python.org>
Message-ID: <slrnfclool.1pk.horpner@FIAD06.norwich.edu>

On 2007-08-20, Shawn Milochik <Shawn at Milochik.com> wrote:
> Everybody hates regexes. Except me. Discrimination!

I love them when I'm editing files with Vim, hate 'em when I'm
analyzing files with Python code.  So I'm a descriminate
descriminator.

-- 
Neil Cerutti
The First World War, cause by the assignation of the Arch-Duck by a surf,
ushered in a new error in the anals of human history. --History Exam Blooper


From aleax at mac.com  Mon Aug 13 10:48:24 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 13 Aug 2007 07:48:24 -0700
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
	<46B8626A.2070303@bigfoot.com>
	<mailman.1726.1186537161.22759.python-list@python.org>
	<5hsoi3F3mlni2U1@mid.individual.net> <f9ceb9$jsm$1@sea.gmane.org>
	<1186581124.3383.55.camel@dot.uniqsys.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
	<slrnfbk19k.20o.horpner@FIAD06.norwich.edu>
	<1i2nhxn.tme05x17r39odN%aleax@mac.com>
	<m3hvi.37606$G23.6240@newsreading01.news.tds.net>
	<EAqvi.37622$G23.4722@newsreading01.news.tds.net>
	<1i2oxyo.cprrpi3nqji1N%aleax@mac.com>
	<slrnfc0mtk.1us.horpner@FIAD06.norwich.edu>
Message-ID: <1i2rwtc.7ea0pp19us4oeN%aleax@mac.com>

Neil Cerutti <horpner at yahoo.com> wrote:
   ...
> > Then we get into unpacking assignments and augmented
> > assignments, but I don't really want to write two more pages
> > worth of summary...;-).
> 
> Thanks very much for taking the time to help clear up my
> erroneous model of assignment in Python. I'd taken a conceptual
> shortcut that's not justified.

You're very welcome, it's always a pleasure to help!


Alex


From steve at holdenweb.com  Thu Aug 23 17:20:11 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 23 Aug 2007 17:20:11 -0400
Subject: Impersonate another user temporarily (Unix and Windows)
In-Reply-To: <1187895663.991360.224830@x40g2000prg.googlegroups.com>
References: <1187809798.274511.230240@z24g2000prh.googlegroups.com>	<mailman.161.1187858227.32294.python-list@python.org>	<1187866104.967297.324650@j4g2000prf.googlegroups.com>	<mailman.166.1187867611.32294.python-list@python.org>
	<1187895663.991360.224830@x40g2000prg.googlegroups.com>
Message-ID: <faktmf$89q$1@sea.gmane.org>

billiejoex wrote:
> On 23 Ago, 13:13, "Chris Mellon" <arka... at gmail.com> wrote:
[...]
>> Note that running your process as a user with enough priviledges to
>> impersonate another user pretty much eliminates all the benefits of
>> running as a low-priviledged user in the first place. Consider
>> re-thinking your application model and having an "ftp" user instead.- Nascondi testo tra virgolette -
>>
>> - Mostra testo tra virgolette -
> 
> Could you be more precise?
> Why it's not a good idea?
> I was thinking of starting ftpd as limited user ('nobody'/'ftp' on
> unix, 'Guest' on Windows), then temporary switching to another user
> when I got to perform actions on file system.
> Maybe you're saying that as limited user I can't do such switching?
> 
That's exactly what he's saying.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bborcic at gmail.com  Fri Aug 24 06:35:08 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Fri, 24 Aug 2007 12:35:08 +0200
Subject: List Comprehension Question: One to Many Mapping?
In-Reply-To: <7x8x81l9z3.fsf@ruckus.brouhaha.com>
References: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
	<7x8x81l9z3.fsf@ruckus.brouhaha.com>
Message-ID: <famcak$17e$1@sea.gmane.org>

Paul Rubin wrote:
> beginner <zyzhu2000 at gmail.com> writes:
>> For example, if I have x=[ [1,2], [3,4] ]
>>
>> What I want is a new list of list that has four sub-lists:
>>
>> [[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]]
> 
> [[a, map(f,a)] for a in x]

no, that one will be [[[1,2], [f(1), f(2)]], [[3,4], [f(3), f(4)]]]
eg two sublists instead of four.

[map(g,a) for a in x for g in [None,f]]

will do it.

...a bit too cleverly, but there's worse :

list((yield a) or map(f,a) for a in x)

Cheers, BB



From bj_666 at gmx.net  Fri Aug 17 08:59:55 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 17 Aug 2007 12:59:55 GMT
Subject: Naming dictionaries recursively
References: <1187354296.177606.273300@22g2000hsm.googlegroups.com>
Message-ID: <5ilkebF3oltfoU2@mid.uni-berlin.de>

On Fri, 17 Aug 2007 12:38:16 +0000, TYR wrote:

> I'd like to do something like this; iterate through a file which
> consists of data stored in dictionary format, one dict on each line,
> and read each line into a new dict using one of the values in the dict
> as its name...

Store the dictionaries in a dictionary with that value as key.

> A line from data.txt would look like this: {'name' : Bob, 'species' :
> Humboldt, 'colour' : red, 'habits' : predatory}. Aim is to call one of
> them by name, and merge the values in that dictionary into a string
> pulled from another source.

So the tougher problem seems to be parsing those lines.  That is not a
valid Python dictionary unless the names `Bob`, `Humboldt`, `red`, and
`predatory` are not already defined.  So you can't just ``eval`` it.

Ciao,
	Marc 'BlackJack' Rintsch


From james.p.news at gmail.com  Wed Aug 22 21:41:33 2007
From: james.p.news at gmail.com (james.p.news at gmail.com)
Date: Thu, 23 Aug 2007 01:41:33 -0000
Subject: libgmail failure
In-Reply-To: <8j3zi.4129$Oo.2593@newssvr17.news.prodigy.net>
References: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
	<il_yi.1379$JD.695@newssvr21.news.prodigy.net>
	<1187810899.496022.314240@z24g2000prh.googlegroups.com>
	<8j3zi.4129$Oo.2593@newssvr17.news.prodigy.net>
Message-ID: <1187833293.481151.68900@m37g2000prh.googlegroups.com>

On Aug 22, 4:11 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> james.p.n... at gmail.com wrote:
> > On Aug 22, 10:26 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> >> Have you thought about spoofing explorer? Always spoof explorer.
>
> >> James
>
> > I have not heard of this.  How do you spoof IE in libgmail?
>
> You might have to edit libgmail.py directly and add a header to the
> urllib2.Request() call. Here are the relevant lines from some code I
> wrote (spoofing netscape it looks like):
>
> user_agent = 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)'
> txheaders =  {'User-agent' : user_agent}
> req = urllib2.Request(pda, signin_params, txheaders)
>
> See if this doesn't fix you up.
>
> James

Well, here's what I tried:

Starting at line 344 of the latest version of libgmail:
-------------------------------------------------------------
#headers = {'Host': 'www.google.com',
#           'User-Agent': 'Mozilla/5.0 (Compatible; libgmail-python)'}
headers = {'Host': 'www.google.com',
                 'User-Agent': 'Mozilla/4.0 (compatible; MSIE 7.0;
Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.2)'}

req = urllib2.Request(URL_LOGIN, data=data, headers=headers)
-------------------------------------------------------------

I grabbed the header information from IE7's identification at
http://www.alanwood.net/demos/browserinfo.html.  I got the same
error.  Am I doing it wrong, or is it not working?  I'm very, very new
to net protocols and such...

Thanks,
James



From miki.tebeka at gmail.com  Sat Aug  4 14:07:27 2007
From: miki.tebeka at gmail.com (Miki)
Date: Sat, 04 Aug 2007 18:07:27 -0000
Subject: Website data-mining.
In-Reply-To: <mailman.1608.1186210048.22759.python-list@python.org>
References: <mailman.1603.1186196436.22759.python-list@python.org>
	<1186207478.055593.107110@z24g2000prh.googlegroups.com>
	<mailman.1608.1186210048.22759.python-list@python.org>
Message-ID: <1186250847.802975.190190@x40g2000prg.googlegroups.com>

Hello,

> >> I'm using Python for the first time to make a plug-in for Firefox.
> >> The goal of this plug-in is to take the source code from a website
> >> and use the metadata and body text for different kinds of analysis.
> >> My question is: How can I retrieve data from a website? I'm not even
> >> sure if this is possible through Python. Any help?
> > Have a look athttp://www.myinterestingfiles.com/2007/03/playboy-germany-ads.html
>
> Well, it's certainly interesting, but I'm not sure how it might help the OP get data from a website...
Ouch, let there be a lesson to me to *read* my posts before sending
them :)

Should have been http://wwwsearch.sourceforge.net/mechanize/.

--
Miki (who can't paste) Tebeka
miki.tebeka at gmail.com
http://pythonwise.blogspot.com



From edloper at gradient.cis.upenn.edu  Thu Aug  9 23:47:37 2007
From: edloper at gradient.cis.upenn.edu (Edward Loper)
Date: Thu, 09 Aug 2007 22:47:37 -0500
Subject: mmm-mode, python-mode and doctest-mode?
In-Reply-To: <46BAA8D6.1050402@gradient.cis.upenn.edu>
References: <46BAA8D6.1050402@gradient.cis.upenn.edu>
Message-ID: <46BBDFD9.2030406@gradient.cis.upenn.edu>

Edward Loper wrote:
>> Anyone testing on xemacs?  I tried it, and C-c C-c sent xemacs into an
>> infinite loop (apparantly).

I may have tracked down the cause of this problem.  Please download the 
most recent version, and try again.  And when you do, let me know 
whether that fixed it. :)

-Edward


From stargaming at gmail.com  Mon Aug  6 12:18:50 2007
From: stargaming at gmail.com (Stargaming)
Date: 06 Aug 2007 16:18:50 GMT
Subject: boolean operations on sets
References: <1186409631.147290.323400@22g2000hsm.googlegroups.com>
Message-ID: <46b749ea$0$26231$9b622d9e@news.freenet.de>

On Mon, 06 Aug 2007 14:13:51 +0000, Flavio wrote:

> Hi, I have been playing with set operations lately and came across a
> kind of surprising result given that it is not mentioned in the standard
> Python tutorial:
> 
> with python sets,   intersections  and unions are supposed to be done
> like this:
> In [7]:set('casa') & set('porca')
> Out[7]:set(['a', 'c'])
> 
> In [8]:set('casa') | set('porca')
> Out[8]:set(['a', 'c', 'o', 'p', 's', 'r'])
> 
> and they work correctly. Now what is confusing is that if you do:
> 
> In [5]:set('casa') and set('porca')
> Out[5]:set(['a', 'p', 'c', 'r', 'o'])
> 
> In [6]:set('casa') or set('porca')
> Out[6]:set(['a', 'c', 's'])
> 
> The results are not what you would expect from an AND  or OR operation,
> from the mathematical point of view! aparently the "and" operation is
> returning the the second set, and the "or" operation is returning the
> first.

That might be, because `and` and `or` are not mathematical in Python (at 
least not as you think). All the operator bits, e.g. `|` and `&`, are 
overloadable. You can just give them any meaning you want.

The `and` and `or` operator, though, are implemented in Python and there 
is no way you can make them behave different from how they do it by 
default. It has been discussed to remove this behaviour or make them 
overloadable as well but this hasn't made it far, as far as I remember.

> If python developers wanted these operations to reflect the traditional
> (Python) truth value for data structures: False for empty data
> structures and True otherwise, why not return simply True or False?

Because in the most cases, returning True of False simply has no 
advantage. But returning the actual operands has been of fairly large 
use, e.g. for replacing the if expression ("ternary operator") ``THEN if 
COND else DEFAULT`` with ``COND and THEN or DEFAULT`` (which has some bad 
corner cases, though).

> So My question is: Why has this been implemented in this way? I can see
> this confusing many newbies...

Hmm, you could be right there. But they shouldn't be biased by default 
boolean behaviour, then, anyways.


From unews at onlinehome.de  Tue Aug 14 09:06:20 2007
From: unews at onlinehome.de (Uwe Grauer)
Date: Tue, 14 Aug 2007 15:06:20 +0200
Subject: Icons for GUI development
In-Reply-To: <1187058129.306171.174590@g12g2000prg.googlegroups.com>
References: <1187058129.306171.174590@g12g2000prg.googlegroups.com>
Message-ID: <f9s9cd$67j$1@online.de>

Benjamin wrote:
> I'm developing a mail client. Since GUI are usually improved with some
> icons, I'm looking for some. Because I'm not a very gifted artist I'm
> searching for a library of GPL or public domain icons. Any suggestions?
> 

http://tango.freedesktop.org/Tango_Icon_Library


From marco at sferacarta.com  Wed Aug 29 06:08:23 2007
From: marco at sferacarta.com (Marco Mariani)
Date: Wed, 29 Aug 2007 12:08:23 +0200
Subject: Haskell like (c:cs) syntax
In-Reply-To: <mailman.85.1188339894.28954.python-list@python.org>
References: <fb25uh$gl9$1@online.de>
	<mailman.85.1188339894.28954.python-list@python.org>
Message-ID: <rAbBi.13285$fb.8669@tornado.fastwebnet.it>

Ricardo Ar?oz ha scritto:

> L = ['one', 'two', 'three', 'four', 'five']
> 
> print L[0]    # This would be 'head'
> print L[1:]   # This would be 'tail'
> 
> Caution : L[0] and L[1:] are COPIES of the head and tail of the list.

This might surprise people who see L[1:] = [], since changing a copy is 
not supposed to change the original.



From rcdailey at gmail.com  Fri Aug 17 18:45:54 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Fri, 17 Aug 2007 17:45:54 -0500
Subject: Question about 'for' loop
Message-ID: <496954360708171545m6a0eff61la5fe270145246eab@mail.gmail.com>

Hi,

I noticed that the 'for' loop can be used inline with a list definition. For
example:

print [i for i in mylist]

My first question is what is the name for this? I couldn't find this usage
in the python docs; I only managed to learn about it through code samples on
the internet.

Secondly, I'm wondering how I can use this method of a for loop to append
strings to strings in a list. For example:

mylist = [
"Hello ",
"Hello again "
]

I should be able to do this:

print [ i + "World" for i in mylist ]

Which should yield the output:

["Hello World", "Hello again world"]

However, instead I get an error message saying "TypeError: cannot
concatenate 'str' and 'list' objects"

How can I achieve the above? Thanks for reading.
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From boazin at gmail.com  Fri Aug 10 12:07:15 2007
From: boazin at gmail.com (boazin at gmail.com)
Date: Fri, 10 Aug 2007 09:07:15 -0700
Subject: building a rather simple server in python
Message-ID: <1186762035.436089.119690@m37g2000prh.googlegroups.com>

Hi all,

I was trying to build a rather simple server (with a twist) using
asyncore and got myself complicated.
Well, here's the deal:

My server will handle multiple connections, some require reply, and
some not (they will disconnect by themselves)
all the clients want to to deliver binary data to a socket we'll call
P socket. this socket is a device that hopefully always wating for new
data (It's actually a hardware).
The replies will come on a different socket, we'll call socket T. When
the server receives a reply (again binary data) it will send it to all
the "wating for reply" clients (the client will determine if it is for
him or not).
My problems arise when I need to write to socket P and then somehow,
somewhen, read the responses from socket T.

Hopefully, the description is clear enough

I tried to use asyncore and got tangled up with the reactiveness of
it.
Any ideas? how to use it with asyncore? other implementations?



From nick at craig-wood.com  Sat Aug 18 06:30:06 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 18 Aug 2007 05:30:06 -0500
Subject: How to say $a=$b->{"A"} ||={} in Python?
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<1i2ysn4.7ue1uud53iygN%raims@dot.com>
	<1187304738.181728.13820@q3g2000prf.googlegroups.com>
Message-ID: <slrnfcdhrt.t75.nick@irishsea.home.craig-wood.com>

beginner <zyzhu2000 at gmail.com> wrote:
>  On Aug 16, 5:43 pm, ra... at dot.com (Lawrence Oluyede) wrote:
> > beginner <zyzhu2... at gmail.com> wrote:
> > > I'd like to do the following in more succint code:
> >
> > > if k in b:
> > >     a=b[k]
> > > else:
> > >     a={}
> > >     b[k]=a
> >
> > b.setdefault(k, a)
> >
> 
>  I am afraid it is not the same. b.setdefault(k, {}) will always create
>  an empty dict, even if k is in b

That is certainly true, but does it matter?  You waste a very small
amount of time creating a dict you don't use.

  $ python -m timeit '{}'
  1000000 loops, best of 3: 0.247 usec per loop

On my machine 250 ns gets you a new dict...

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


From cdalten at gmail.com  Sat Aug  4 11:40:55 2007
From: cdalten at gmail.com (grocery_stocker)
Date: Sat, 04 Aug 2007 15:40:55 -0000
Subject: I am giving up perl because of assholes on clpm -- switching to
	Python
In-Reply-To: <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d@giganews.com>
References: <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d@giganews.com>
Message-ID: <1186242055.553090.112680@m37g2000prh.googlegroups.com>

On Jul 25, 12:45 pm, Martha_Jo... at tx.net wrote:
> Python is a better language, with php support, anyway, but I am fed up
> with attitudes of comp.lang.perl.misc. Assholes in this newsgroup ruin
> Perl experience for everyone. Instead of being helpful, snide remarks,
> back-biting, scare tactings, and so on proliferate and self
> reinforce. All honest people have left this sad newsgroup. Buy bye,
> assholes, I am not going to miss you!!!
>
> Martha

In the beginning there was Mathematics
And all was good
Then one day God said "Let there be the Lambda Calculus"
And hence the Lambda Calculus was born.
However, God felt the the Lambda Calculus needed a mate
So god said "Let there be Lisp"
And thus, Lisp was born.

As the years went on, god became depressed by how impure the Lisp had
become.
For from the Lisp, came Emacs Lisp, Java, Perl, Ruby, and Python.



From richardjones at optushome.com.au  Sun Aug 19 17:59:10 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Mon, 20 Aug 2007 07:59:10 +1000
Subject: How to setup pyOpenGL3.0.a6 for window xp?
References: <1187395670.267971.88750@q4g2000prc.googlegroups.com>	<1187397743.937458.301590@q3g2000prf.googlegroups.com>
	<1187541646.185788.15310@k79g2000hse.googlegroups.com>
	<mailman.2170.1187546485.22759.python-list@python.org>
Message-ID: <46c8bd2e$0$7087$afc38c87@news.optusnet.com.au>

Gary Herron wrote:
> Jason wrote:
>> On Aug 17, 6:42 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
>>   
>>> Windows comes with OpenGL libraries.  However, before you can use
>>> OpenGL you'll need a package that can provide an OpenGL context, which
>>> PyOpenGL doesn't do (easily).
>>>
>>> PyGame is the typical choice for most uses.  If all you need is a
>>> simple window to draw on, this is the package you want.
>>>     
> If you want an *easy* way to create an OpenGL window and context, you
> could try FLTK, and it's Python wrapper PyFLTK.

The simplest method by far uses pyglet from http://www.pyglet.org/

    from pyglet import window
    w = window.Window(200, 200)
    while not w.has_exit:
        w.dispatch_events()
        ... do OpenGL stuff

pyglet has no compilation and no dependencies and works on Linux, OS X and
Windows. You can use PyOpenGL with it just fine, or use its own gl layer
(which is intentionally less pythonic)


     Richard



From thisdyingdream at gmail.com  Thu Aug  9 10:14:47 2007
From: thisdyingdream at gmail.com (Steven Harms)
Date: Thu, 9 Aug 2007 10:14:47 -0400
Subject: how to get command output using python
Message-ID: <b6bf7b050708090714vde102al5ea0c21bdae1a604@mail.gmail.com>

In python it is quite easy:

import commands

status, output = commands.getstatusoutput("my command")
--------------------

status will be the return code of the command
output will be what the command displayed

-sjh
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From jcd at sdf.lonestar.org  Thu Aug 30 11:37:57 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 30 Aug 2007 11:37:57 -0400
Subject: strings (dollar.cents) into floats
In-Reply-To: <46D6D8D2.2030102@islandtraining.com>
References: <12B58F2B-2F4F-4F6A-9F75-7444427B8CA8@email.it>
	<46D6D8D2.2030102@islandtraining.com>
Message-ID: <46D6E455.1060608@sdf.lonestar.org>

Gary Herron wrote:
> luca bertini wrote:
>   
>> Hi,
>>
>> i have strings which look like money values (ie 34.45)
>> is there a way to convert them into float variables?
>> everytime i try I get this error: "numb = float(my_line) ValueError:  
>> empty string for float()"
>> "
>> here's the code
>>
>> ************
>>
>> import sys
>> import re
>>
>> for line in sys.stdin.readlines():
>> 	my_line = line.rstrip()
>> 	numb = float(my_line)
>> 	print numb
>>   
>>     
> The clue "empty string for float" must mean that the value of my_line is
> an empty string.  And that would seem to mean you have an empty line in
> your input. 
>
> So...  Either remove the empty lines, or test my_line before calling
> float on it.
>
> Gary Herron
>
>   
Or let the exception get raised, and handle it.

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From gherzig at fmed.uba.ar  Thu Aug 30 18:43:39 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Thu, 30 Aug 2007 19:43:39 -0300
Subject: Setting a read-only attribute
In-Reply-To: <1188509700.915517.178440@z24g2000prh.googlegroups.com>
References: <1188509700.915517.178440@z24g2000prh.googlegroups.com>
Message-ID: <46D7481B.8050607@fmed.uba.ar>

tleeuwenburg at gmail.com wrote:

>I have an object and wish to set an attribute on it which,
>unfortunately for me, is read-only.
>
>How can I go about this?
>
>Cheers.
>-T
>
>  
>
I guess we all need an code example to show us the way 'read only' is 
implemented.
If you cant access to the class wich you are instantiated from, well, 
maybe you can just post the error or exception you get.

Cheers.
Gerardo


From tchur at optushome.com.au  Tue Aug 14 09:11:44 2007
From: tchur at optushome.com.au (Tim Churches)
Date: Tue, 14 Aug 2007 23:11:44 +1000
Subject: Fast kNN from python
In-Reply-To: <1187086584.076990.260680@r34g2000hsd.googlegroups.com>
References: <1187086584.076990.260680@r34g2000hsd.googlegroups.com>
Message-ID: <46C1AA10.70104@optushome.com.au>

Janto Dreijer wrote:
> I am looking for a Python implementation or bindings to a library that
> can quickly find k-Nearest Neighbors given an arbitrary distance
> metric between objects. Specifically, I have an "edit distance"
> between objects that is written in Python.

Orange? See http://www.ailab.si/orange/ - not sure about speed, but
quite a few parts of it are written in C, and it does kNN.

Tim C


From bg_ie at yahoo.com  Wed Aug 22 03:27:09 2007
From: bg_ie at yahoo.com (bg_ie at yahoo.com)
Date: Wed, 22 Aug 2007 00:27:09 -0700
Subject: Python Path Dictionary
In-Reply-To: <mailman.81.1187725521.32294.python-list@python.org>
References: <1187706985.476483.292820@g4g2000hsf.googlegroups.com>
	<mailman.66.1187710972.32294.python-list@python.org>
	<1187723618.729114.19020@19g2000hsx.googlegroups.com>
	<mailman.81.1187725521.32294.python-list@python.org>
Message-ID: <1187767629.688228.186190@l22g2000prc.googlegroups.com>

On 21 Aug, 21:45, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/21/07, aine_ca... at yahoo.com <aine_ca... at yahoo.com> wrote:
>
>
>
>
>
> > On 21 Aug, 17:42, Gary Herron <gher... at islandtraining.com> wrote:
> > > aine_ca... at yahoo.com wrote:
> > > > Hi,
>
> > > > Do the Python Paths come in the form of a dictionary where I can
> > > > access a particular path my its key in the registry?
>
> > > > For example, in PythonWin Tools>>Edit Python Paths shows the name as
> > > > well of the address of each path
>
> > > > Thanks,
>
> > > > Aine
>
> > > If by "Python Paths" you mean the list of directories searched when
> > > doing an import, then it is a list (not a dictionary and you can access
> > > it as sys.path.
>
> > > Here it is on both my Linux and Windows systems:
>
> > > >>> import sys
> > > >>> sys.path
>
> > > ['', '/usr/lib/portage/pym', '/usr/lib/python25.zip',
> > > '/usr/lib/python2.5', '/usr/lib/python2.5/plat-linux2',
> > > '/usr/lib/python2.5/lib-tk', '/usr/lib/python2.5/lib-dynload',
> > > '/usr/lib/python2.5/site-packages',
> > > '/usr/lib/python2.5/site-packages/Numeric',
> > > '/usr/lib/python2.5/site-packages/PIL',
> > > '/usr/lib/python2.5/site-packages/gtk-2.0']
>
> > > >>> import sys
> > > >>> sys.path
>
> > > ['', 'C:\\WINDOWS\\system32\\python24.zip', 'C:\\cygwin\\home\\Gary',
> > > 'c:\\python24\\DLLs', 'c:\\python24\\lib',
> > > 'c:\\python24\\lib\\plat-win', 'c:\\python24\\lib\\lib-tk',
> > > 'c:\\python24', 'c:\\python24\\lib\\site-packages',
> > > 'c:\\python24\\lib\\site-packages\\Numeric',
> > > 'c:\\python24\\lib\\site-packages\\PIL',
> > > 'c:\\python24\\lib\\site-packages\\gtk-2.0',
> > > 'c:\\python24\\lib\\site-packages\\win32',
> > > 'c:\\python24\\lib\\site-packages\\win32\\lib',
> > > 'c:\\python24\\lib\\site-packages\\Pythonwin']
>
> > Thanks.
>
> > Yeah, that's exactly what I'm talking about, but I don't want the
> > list, I want to access a certain path by name. I'm guessing I'm going
> > to have to write a function to do this that reads the value from the
> > registry.
>
> The elements of the path don't have names - they are a list of
> directories. You are mistaking Pythonwins configuration options (like
> where it searches for modules) for the python path.
>
> Note that the registry entry "PythonPath" (which is not respected by
> Python, but used by Pythonwin to override the default python path) is
> a semi-colon separated list, not a series of keys.- D?lj citerad text -
>
> - Visa citerad text -

Your right with regard to Python Win! Although, it can be both a semi-
colon seperated list and/or a set of keys. On my PC I have a default
key under python paths (with a list of paths), plus a set of keys with
their own individul paths. I can therefore install my python code in
any directory and manipulate these keys to find the modules I need.



From steve at holdenweb.com  Thu Aug  2 11:14:53 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Aug 2007 11:14:53 -0400
Subject: Case study: library class inheritance with property declarations
In-Reply-To: <1186065365.546545.184840@i13g2000prf.googlegroups.com>
References: <1186062582.975223.230270@g12g2000prg.googlegroups.com>	<1186063694.311416.133390@i13g2000prf.googlegroups.com>
	<1186065365.546545.184840@i13g2000prf.googlegroups.com>
Message-ID: <f8ssdf$2ap$1@sea.gmane.org>

cdleary at gmail.com wrote:
> On Aug 2, 7:08 am, cdle... at gmail.com wrote:
>> On Aug 2, 6:49 am, cdle... at gmail.com wrote:
>>
>>
>>
>>> Hi all,
>>> It's possible that I'm missing the obvious -- I've been up for over 24
>>> hours and I'm most likely dehydrated from mass coffee intake, but I
>>> figure many people in similar circumstances will be searching
>>> comp.lang.python one day, so here goes!
>>> class LibraryClass(object):
>>>     """
>>>     A class whose implementation is out of my hands.
>>>     """
>>>     def __init__(self):
>>>         """
>>>         Follows good dynamic-language form and binds all instance
>>>         variables at initialization time.
>>>         """
>>>         # Omitted: complex initialization functionality.
>>>         self.useful_attr = None
>>> class MyInheritedClass(LibraryClass):
>>>     """
>>>     My refinement of the functionality offered by the LibraryClass. I
>>>     now want the instance to initialize with a reference to an
>>> external
>>>     object, and the useful_attr defined in the superclass will now
>>>     reference an attribute of that external object via fget.
>>>     Changing the attribute of the external object has undefined
>>>     behavior, so I want to omit an fset in the property declaration;
>>>     however, I have to provide some way for the superclass to
>>>     initialize useful_attr -- I can't change the superclass' code, as
>>> it
>>>     resides in a library that is out of my hands.
>>>     """
>>>     def __init__(self, external_obj):
>>>         LibraryClass.__init__(self)
>>>         self._external_obj = external_obj
>>>     def get_useful_attr(self):
>>>         return self._external_obj.proxy_useful_attr
>>>     useful_attr = property(fget=get_useful_attr)
>>> def test():
>>>     class _Fake(object):
>>>         pass
>>>     external_obj = _Fake()
>>>     external_obj.proxy_useful_attr = 12
>>>     spam = MyInheritedClass(external_obj)
>>> if __name__ == '__main__':
>>>     test()
>>> EOF
>>> If you're one of those people who doesn't like laboriously reading
>>> contrived examples (elitists ;) I'll boil it down for you: Library
>>> class initializes some attribute, but derived class wants to eliminate
>>> fsets for said attribute. As a result, our ideal solution
>>> Of course, this means that the derived class will raise an error in
>>> some circumstances where the base class wouldn't (when you're setting
>>> that attribute), but one can assume that the inheritance is
>>> worthwhile.
>>> How do I come up with silly solutions to circumvent this? Let me count
>>> the ways...
>>> 1. So-and-so: make an fset that does nothing. This ignores (what
>>> should be) errors in code that uses MyInheritedClass in an attempt to
>>> accommodate a useless statement in the base class -- surely non-ideal.
>>> 2. The ugly one: since you can probably view the library, copy and
>>> paste the complex initialization functionality in the above, but leave
>>> out the bad statement. This not only forfeits the ideals of
>>> inheritance, but makes you totally incompatible with future library
>>> changes.
>>> 3. Cheerleader: Pure evil. On top of the ugliness of 2, you assume
>>> that across library revisions the indenting won't change and that the
>>> troublesome statement will remain on the same line, and pull off one
>>> of these babies:
>>> def super_evil_test():
>>>     from inspect import getsourcelines
>>>     exec(''.join([line[4:] for line in
>>>                   getsourcelines(LibraryClass.__init__)[0][:-1]]))
>>>     LibraryClass.__init__ = __init__
>>>     test() # Passes, but several angels no longer get their wings
>>> Totally kidding, everybody! I hope Guido doesn't read this thread...
>>> And this concludes the sleep deprived rambling that follows the
>>> somewhat interesting case in point. Thoughts?
>> I'm sorry -- the solution was not /enough/ coffee. Got another cup and
>> sat down with the type/class unification doc, and found this thought-
>> stimulating portion:
>>
>> http://www.python.org/download/releases/2.2/descrintro/#property
>> If you want to override the __get__ operation for properties when used
>> as a class attribute, you can subclass property - it is a new-style
>> type itself - to extend its __get__ method, or you can define a
>> descriptor type from scratch by creating a new-style class that
>> defines __get__, __set__ and __delete__ methods.
>> ...
>> The get method won't be called when the property is accessed as a
>> class attribute (C.x) instead of as an instance attribute (C().x).
>>
>> Seeing as how property is just a wrapper class, we don't need to
>> declare it in the class body, though it /is/ the convention and the
>> way it's done in all the docs I've seen. We fix our inherited class to
>> be the following:
>>
>> [snip]
>> class MyInheritedClass(LibraryClass):
>>
>>     """
>>     My refinement of the functionality offered by the LibraryClass. I
>>     now want the instance to initialize with a reference to an
>> external
>>     object, and the useful_attr defined in the superclass will now
>>     reference an attribute of that external object via fget.
>>
>>     Changing the attribute of the external object has undefined
>>     behavior, so I want to omit an fset in the property declaration;
>>     however, I have to provide some way for the superclass to
>>     initialize useful_attr -- I can't change the superclass' code, as
>> it
>>     resides in a library that is out of my hands.
>>     """
>>
>>     def __init__(self, external_obj):
>>         LibraryClass.__init__(self)
>>         self.useful_attr = property(fget=self.get_useful_attr)
>>         self._external_obj = external_obj
>>
>>     def get_useful_attr(self):
>>         return self._external_obj.proxy_useful_attr
>> [snip]
>>
>> And it tests like a charm.
> 
> Last post -- I swear.
> 
> I failed to realize that it's all part of an extremely well defined
> attribute resolution protocol, and handled via the descriptor
> specification. Discussing descriptors was on the TODO list for the
> type/class unification document, but there's a very fulfilling
> explanation by Raymond Hettinger: http://users.rcn.com/python/download/Descriptor.htm
> Also, the official doc is here: http://docs.python.org/ref/descriptors.html
> 
> Maybe the documentation for the property builtin should make reference
> to the descriptor specification? If nobody thinks this is silly, I'll
> submit a documentation patch in a few days.
> 
> Sorry for the spam -- hope someone besides me learns from it!
> 
And I hope you learn to get more sleep ;-)

short-on-sleep-myself-this-week-ly y'rs  - steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From matt.rasmus at gmail.com  Thu Aug 23 11:06:38 2007
From: matt.rasmus at gmail.com (rasmus)
Date: Thu, 23 Aug 2007 15:06:38 -0000
Subject: How do I get the current path of my python file that is currently
	running.
In-Reply-To: <mailman.156.1187854444.32294.python-list@python.org>
References: <eb79828c0708222012o1dec7c82k24c4a4c9015b6df7@mail.gmail.com>
	<mailman.156.1187854444.32294.python-list@python.org>
Message-ID: <1187881598.972693.323880@e9g2000prf.googlegroups.com>

On Aug 23, 3:33 am, Arnau Sanchez <ar... at ehas.org> wrote:
> Lamonte Harris escribi?:
>
> > Say I start i click on a python file on my desktop, how could I return
> > the path of the current python file thats running?
>
> http://docs.python.org/lib/module-sys.html

Try this:

import sys
import os
print sys.argv[0]
print os.getcwd()

-----
sys.argv[0] should contain the name of the script as it was called.
os.getcwd() will return the current working directory, which may also
find helpful.

hope this helps.

Matt





From Dominic at PLEASEASK.co.uk  Thu Aug  9 07:15:21 2007
From: Dominic at PLEASEASK.co.uk (special_dragonfly)
Date: Thu, 9 Aug 2007 12:15:21 +0100
Subject: Help with Dictionaries and Classes requested please.
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
	<46baf183$0$433$426a74cc@news.free.fr>
Message-ID: <46baf384$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>


"Bruno Desthuilliers" <bruno.42.desthuilliers at wtf.websiteburo.oops.com> 
wrote in message news:46baf183$0$433$426a74cc at news.free.fr...
> special_dragonfly a ?crit :
> (snip)
>> I've managed to solve the problem, I really was just being a dunce. 
>> Here's how incase anyone is wondering:
>>
>> class MyClass:
>>     def __init__(self):
>>         name=""
>> dict={}
>> dict[0]=[]
>> dict[0].append(MyClass())
>> dict[0][0].name="Hello"
>> print dict[0][0].name
>>
>> I'm sorry if I've wasted anyones time, although if there's a better way 
>> of doing the above I'd still be interested to know.
>
> # unless you need pre 2.3.x compat, better to use newstyle classes
> class MyClass(object):
>   # use the initializer to initialize your instance
>   def __init__(self, name=''):
>     # the use of 'self' is mandatory, else you only have a local var
>     self.name = name
>
> # don't use builtin names as identifiers - unless you really want to
> # shadow the builtins
> d = {0:[MyClass('hello')}
> d[0].append(MyClass('goodbye'))
> d.setdefault(1, []).append(MyClass('Yo'))
> print d
>
> HTH

Hello
To answer first Bjoern:
I have a dictionary and a class. The dictionary needs to be filled with 
multiple instances of the class, with multiple instances per key. Currently 
a lot of the dictionaries that are going into the program are hard coded 
because they're just 1:1 mappings, in this case though it was a many:1 
mapping and so I got a little stumped. I couldn't hard coded the mappings, 
so I then needed to find a way of doing it dynamically. I'm now reading data 
from a file containing the data for the class, and am now able to put that 
data into a dictionary.

I'm quite new to programming large things, and previous experience has only 
been in C and C++, so I'm also trying to get an idea of good programming 
practises. Other people are going to need to use this program, I need it to 
be... correct... should someone need to alter it. So loads of documentation, 
and meaningful variable names, but it's also experience that I'm lacking. Is 
there a better way of doing such-and-such, or is it sensible to do it this 
way....?

The code above does what I need, thank you Bruno. I can understand that my 
code is right there next to useless when trying to describe what I need to 
do.
Were I doing this in C, I would be creating a 2D array of structures, at 
least... I believe that's how it would look.

Thank you for your help, all of you.
Dominic 




From rajingwei at gmail.com  Thu Aug 16 04:18:49 2007
From: rajingwei at gmail.com (baby's happy)
Date: Thu, 16 Aug 2007 01:18:49 -0700
Subject: Who told str() to round my int()'s!!!
In-Reply-To: <3ZudnUuJ68lcxl7bnZ2dnUVZ_t_inZ2d@comcast.com>
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
	<9qmvi.47364$s5.1537219@phobos.telenet-ops.be>
	<mailman.1857.1186861157.22759.python-list@python.org>
	<3ZudnUuJ68lcxl7bnZ2dnUVZ_t_inZ2d@comcast.com>
Message-ID: <1187252329.583435.63660@q3g2000prf.googlegroups.com>

I saw your article is very good, I like it very much. I will continue
to pay attention to your article, the following are the points I hope
that I have similar concerns.
http://www.game-win.com http://www.game-win.com/wow-powerleveling.html
http://www.game-win.com/faq.html http://www.game-win.com/power-leveling.html
http://www.game-win.com/World-of-Warcraft-power-leveling.html
http://www.game-win.com/about.html http://www.paper-cup-machine.com/cn/index.html
http://www.sinceremachine.com http://www.clickra.com
http://www.clickra.com/NewsList_2.htm http://www.east163.com
http://www.ruian2machine.cn http://www.rajayj.cn http://www.mycvcv.com
http://www.dgajm.com http://www.icansee.cn http://www.icansee.cn/chanpin.htm
http://www.icansee.cn/8.htm http://www.pjwsdyb.com http://www.shdyf.com
http://www.shdyf.com/nbdy.htm http://www.nonwoven-bags.cn



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Aug 13 06:38:16 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 13 Aug 2007 12:38:16 +0200
Subject: check if var is dict
In-Reply-To: <mailman.1906.1186999320.22759.python-list@python.org>
References: <mailman.1906.1186999320.22759.python-list@python.org>
Message-ID: <46c03479$0$435$426a74cc@news.free.fr>

Astan Chee a ?crit :
> Hi,
> I have a variable, I want to check if it is a dictionary or a string.
> Is there any better way to do this than I've done. How I did it is by 
> doing a .items() and catching a AttributeError that it raises if its not 
> a dictionary.
> How do i properly do it?

Checking the presence of one (or more) attributes of the object is so 
far the best thing to do. Now wrt/ *how* to check, using hasattr() or 
getattr() might be better than a try/except block:

def my_func(some_obj):
   if callable(getattr(obj, 'items', None)) \
      and callable(getattr(obj, 'keys', None)):
        use_obj_as_a_dict(...)
   else:
       use_obj_as_a_string(...)

Now keep in mind that this may lead to false positives if you don't 
carefully choose the attribute(s) to check the presence of...


From horpner at yahoo.com  Thu Aug 30 22:24:50 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 31 Aug 2007 02:24:50 GMT
Subject: beginner, idomatic python 2
References: <13csjmeaoqh9le3@corp.supernews.com>
	<1187927388.173203.298660@e9g2000prf.googlegroups.com>
	<13d4jfjfogbvq6f@corp.supernews.com>
	<46d2ba7a$0$430$426a74cc@news.free.fr>
	<13der4jquo987d1@corp.supernews.com>
Message-ID: <SZKBi.38174$G23.2680@newsreading01.news.tds.net>

On 2007-08-31, bambam <david at asdf.asdf> wrote:
> "Bruno Desthuilliers"
> <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote in
> message news:46d2ba7a$0$430$426a74cc at news.free.fr...
>> As a side note, in Python, inheritance ... ... should usually
>> not be used for typing.
>
>:~(
> I'm sorry, I don't even know what that means... The code I have
> inherited from someone only a little more knowledgeable than
> me, and is still full of development artifacts anyway.
>
> The Pwr and Psp classes inherit from the Device class not
> neccessarily because that is a Good Thing, more because the
> development process led to them being thought of that way. All
> devices have a mixture of common and differing attributes.
>
> What is 'typing'?

In a language with strict types, you may need to make a set of
classes all inherit from one base class simply in order to get
the code to compile.  A common example is a set of classes that
all behave like file streams.

You don't need to do this in Python. Simply have the object
provide the right methods and you are done.

-- 
Neil Cerutti


From markacy at gmail.com  Mon Aug 13 11:53:28 2007
From: markacy at gmail.com (markacy)
Date: Mon, 13 Aug 2007 15:53:28 -0000
Subject: Drawing a graph
In-Reply-To: <mailman.1917.1187012829.22759.python-list@python.org>
References: <mailman.1917.1187012829.22759.python-list@python.org>
Message-ID: <1187020408.524787.103330@g4g2000hsf.googlegroups.com>

On 12 Sie, 21:09, Ghirai <ghi... at ghirai.com> wrote:
> Hello list,
>
> I need to draw a graph, 2 axes, 2D, nothing fancy.
> One of the axes is time, the other one is a series of integers.
>
> I don't care much about the output format.
>
> Are there any specialized libraries for this, or should i use PIL?
>
> Thanks.
>
> --
> Regards,
> Ghirai.

Matplotlib (http://matplotlib.sourceforge.net/)

Cheers,
Marek



From mensanator at aol.com  Thu Aug 30 23:22:37 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Thu, 30 Aug 2007 20:22:37 -0700
Subject: list index()
In-Reply-To: <1i3ob5k.dm3jmoqx1z68N%aleax@mac.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<1i3ob5k.dm3jmoqx1z68N%aleax@mac.com>
Message-ID: <1188530557.550119.27260@q3g2000prf.googlegroups.com>

On Aug 30, 9:26 pm, al... at mac.com (Alex Martelli) wrote:
> <zzbba... at aol.com> wrote:
>
>    ...
>
> > In my case of have done os.listdir() on two directories. I want to see
> > what files are in directory A that are not in directory B.
>
> So why would you care about WHERE, in the listdir of B, are to be found
> the files that are in A but not B?!  You should call .index only if you
> CARE about the position.
>
>
> is the "one obvious way to do it" (the set(...) is just a simple and
> powerful optimization -- checking membership in a set is roughly O(1),
> while checking membership in a list of N items is O(N)...).

Why wouldn't "the one obvious way" be:

 def inAnotB(A, B):
     inA  = set(os.listdir(A))
     inBs = set(os.listdir(B))
     return inA.difference(inBs)
?


>
> Alex




From unlikeablePorpoise at gmail.com  Tue Aug 14 09:20:39 2007
From: unlikeablePorpoise at gmail.com (unlikeablePorpoise at gmail.com)
Date: Tue, 14 Aug 2007 06:20:39 -0700
Subject: JPype - passing to Java main
In-Reply-To: <f9s972$hd2$1@news2.u-psud.fr>
References: <1187040070.806416.75090@r34g2000hsd.googlegroups.com>
	<mailman.1941.1187047345.22759.python-list@python.org>
	<1187095969.789811.63960@j4g2000prf.googlegroups.com>
	<f9s972$hd2$1@news2.u-psud.fr>
Message-ID: <1187097639.176267.33050@d55g2000hsg.googlegroups.com>

Good point Laurent. Here is the error produced when I try to access
main() using
'com.JPypeTest.main("arg")'

The original code is pasted at the top of this thread. I only added
'com.JPypeTest.main("arg")' which causes the error below

-------------ERROR_-------------
  File "tester.py", line 10, in <module>
    com.JPypeTest.main("arg")
RuntimeError: No matching overloads found. at src/native/common/
jp_method.cpp:121
----------END ERROR-------------

Thanks,
Sarah

On Aug 14, 8:03 am, Laurent Pointal <laurent.poin... at limsi.fr> wrote:
> unlikeablePorpo... at gmail.com a ?crit :
>
> >> Try this:
> >> com.JPypeTest.main("arg")
>
> >> Ian
>
> > Thanks for your suggestion, but it doesn't work (produces an error).
>
> This is where you should have copy/pasted the error.
>
> ;-)
>
>
>
> > Does anybody else have any ideas?
>
> Sorry, no.




From nawijn at gmail.com  Wed Aug 29 09:17:33 2007
From: nawijn at gmail.com (Marco Nawijn)
Date: Wed, 29 Aug 2007 06:17:33 -0700
Subject: Code design problem
In-Reply-To: <mailman.100.1188392651.28954.python-list@python.org>
References: <1188389375.238847.298320@w3g2000hsg.googlegroups.com>
	<mailman.100.1188392651.28954.python-list@python.org>
Message-ID: <1188393453.574891.24500@d55g2000hsg.googlegroups.com>

On Aug 29, 3:03 pm, "Marshall T. Vandegrift" <llas... at gmail.com>
wrote:
> Marco Nawijn <naw... at gmail.com> writes:
> > The problem I face is that the implementation of the application class
> > is completely different for the local and remote case. The local case
> > is a straightforward implemenation using the subprocess module, the
> > remote case is a CORBA implementation. Somehow I would like to switch
> > from implementation class at runtime depending on whether or not the
> > host parameter is specified or not.
>
> > The Application, local implementation and remote implementation all
> > have the same interface, so a possibility might be something like the
> > following:
>
> <snipped example>
>
> > To me forwarding each call in the Application class looks a little bit
> > redundant and I would like to get rid of it. Does anyone have any
> > comments or suggestions? Can metaclass programming come to rescue?
>
> It sounds like you could probably get away with just a factory function:
>
>     def Application(program, host=None):
>         if host is None:
>             return LocalApplication(program)
>         else:
>             return RemoteApplication(program, host)
>
> Then just implement the same interface and/or derive from a common base
> class for LocalApplication and RemoteApplication.
>
> HTH!,
>
> -Marshall

Thanks! This makes perfect sense. (In these moments I always wonder
why I didn't come up
with this idea...)

Thanks again.

Regards,

Marco



From ladaan at iptel.org  Fri Aug 24 03:23:08 2007
From: ladaan at iptel.org (Ladislav Andel)
Date: Fri, 24 Aug 2007 09:23:08 +0200
Subject: comparing two lists
In-Reply-To: <fakvli$4da$01$1@news.t-online.com>
References: <mailman.180.1187886381.32294.python-list@python.org>	<fakgtj$c3d$00$1@news.t-online.com>	<mailman.190.1187892928.32294.python-list@python.org>
	<fakvli$4da$01$1@news.t-online.com>
Message-ID: <46CE875C.4010800@iptel.org>

Peter Otten wrote:
> Ladislav Andel wrote:
>
>   
>> Peter Otten wrote:
>>     
>>> Ladislav Andel wrote:
>>>
>>>   
>>>       
>>>> what would be the most efficient way to do following?
>>>>
>>>> I have a list of dictionaries  taken from DB e.g.
>>>> dblist = [{'id:1, 'host':'google.com','ip_address':'1.2.3.4'},
>>>> {'id:3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
>>>> {'id:9, 'host':'msn.com','ip_address':'11.3.2.3'}]
>>>>
>>>> and list of object instances in memory(it's just for example)
>>>> which are looping within itself and testing particular hosts
>>>>
>>>> memlist = [<instance 1>,<instance 2>]
>>>> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
>>>> memlist[1].id  is 9 and  memlist[1].host is msn.com etc.
>>>>
>>>> Now I want to add a new instance to memlist since id=3(in dblist) is not
>>>> in memlist.
>>>> How would you iterate through it and insert a new instance?
>>>>
>>>> The result should be:
>>>> memlist = [<instance 1>,<instance 2>, <instance 3>]
>>>> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
>>>> memlist[1].id  is 3 and  memlist[1].host is yahoo.com etc.
>>>> memlist[2].id  is 9 and  memlist[2].host is msn.com etc.
>>>>     
>>>>         
>>> You should replace the memlist with a dictionary using (host, id) tuples
>>> as the keys. Here's an example that uses a set but requires you to modify
>>> the <instance N> class:
>>>
>>> dblist = [{'id':1, 'host':'google.com','ip_address':'1.2.3.4'},
>>> {'id':3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
>>> {'id':9, 'host':'msn.com','ip_address':'11.3.2.3'}]
>>>
>>> class Item(object):
>>>     def __init__(self, id, host, **discarded):
>>>         self._tuple = (id, host)
>>>     def __hash__(self):
>>>         return hash(self._tuple)
>>>     def __eq__(self, other):
>>>         return self._tuple == other._tuple
>>>     def __repr__(self):
>>>         return "Item(id=%r, host=%r)" % self._tuple
>>>
>>> items = set([Item(1, "google.com")])
>>> for d in dblist:
>>>     item = Item(**d)
>>>     if item not in items:
>>>         print "adding", item
>>>         items.add(item)
>>>     else:
>>>         print item, "already there"
>>>
>>>   
>>>       
>> Thank you for this nice solution. I wouldn't be able to write it this
>> way at all
>>     
>
> Then think twice before you use it. The dictionary approach should be
> straightforward.
>
>   
>> but what about removing from memlist if there is less items in dblist
>> than in items (instances)?
>> I will have to iterate over items(instances) and remove that one which
>> is not in dblist I guess.
>>     
>
> Yes, but again, if you use a dictionary instead of a list the lookup will be
> efficient.
>
> To follow up on my previous post: with sets there is a concise spelling:
>
> items &= set(Item(**d) for d in dblist)
>
> or even
>
> items.intersection_update(Item(**d) for d in dblist)
>
> if you don't mind object identity.
>
> Peter
>
>   
Thanks again for this solution, but I forgot to say that in the instance 
is a looping call which
need to be stopped before deleting any instance from items.
So I need to call stopLoop method in the given item in items before it 
gets removed.
If there is any addition to items it's quite easy to call
item.startLoop() method.


my class would look like (I use twisted but it should not make any 
difference):

class Item(object):
    def __init__(self, id, host, interval, **discarded):
        self._tuple = (id, host)
	self.interval = interval
    def __hash__(self):
        return hash(self._tuple)
    def __eq__(self, other):
        return self._tuple == other._tuple
    def __repr__(self):
        return "Item(id=%r, host=%r)" % self._tuple
    def startLoop(self):
        self.l = task.LoopingCall(self.serverTest)
        self.l.start(self.interval, False)
    def serverTest(self):
        return getReply()       
         # this is just for example. It returns something on each start of the loop
         # but because it sends packets within network, it takes some time before it gets a reply
         # so if I remove this object instance before I get reply it gets broken somewhere else
         # and I need to stop the loop before removing. Hopefully, this make sence.
					
    def stopLoop(self):
        self.l.stop()









From steve at holdenweb.com  Mon Aug 27 06:57:40 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 27 Aug 2007 06:57:40 -0400
Subject: beginner, idomatic python 2
In-Reply-To: <13d4jfjfogbvq6f@corp.supernews.com>
References: <13csjmeaoqh9le3@corp.supernews.com>	<1187927388.173203.298660@e9g2000prf.googlegroups.com>
	<13d4jfjfogbvq6f@corp.supernews.com>
Message-ID: <fauan6$r5e$1@sea.gmane.org>

bambam wrote:
[but he top-posted]
> "Dan Bishop" <danb_83 at yahoo.com> wrote in message 
> news:1187927388.173203.298660 at e9g2000prf.googlegroups.com...
>> On Aug 23, 10:21 pm, "bambam" <da... at asdf.asdf> wrote:
>>> Would someone like to suggest a replacement for this? This is a
>>> function that returns different kinds of similar objects, depending
>>> on what is asked for. PSP and PWR are classes.  I don't really
>>> want to re-write the calling code very much: I'm just wondering
>>> if the function can be replaced with some kind of OOP pattern.
>>>
>>> def Device(DeviceType):
>>>     if DeviceType=='PSP':
>>>         return PSP()
>>>     elif DeviceType=="Power Supply"
>>>         return PWR()
>>>     etc...
>>>
>>> Thanks!
>> Typically, you'd use a dictionary:
>>
>> DEVICE_DICT = {
>>    'PSP': PSP.
>>    'Power Supply': PWR,
>>    # etc.
>> }
>>
>> and your function would simply return DEVICE_DICT[device_type]()
>>
 > Thank you. I didn't reply earlier because I was trying to get my
 > head around what you wrote, which was strange and foreign
 > to me.
 >
 > It seems to me that the dictionary object you suggested is a
 > direct replacement for the function code, only more efficient
 > because the case table is internalised with a hash table, and
 > the original if/elif/else case table was unlikely to be implemented
 > as a hash table.
 >
 > And presumably, it is idiomatic because Python programmers
 > expect to use dictionaries for their lookup tables.
 >
 > You have answered a question I didn't know enough to ask :~)
 > --which is why I started with the general question, so I don't
 > feel too stupid about that --.
 >
 > And now I wonder about the 'other' question. Should I consider
 > dynamically overriding the methods in my 'Device' class, instead
 > of creating separate classes for the Psp and Pwr devices?
 > I could create an object of the base Device class, and at init
 > I could make sure the methods were connected for a Psp or
 > a Pwr device. When (if ever) is that a good idea?
 >
The fact that it's technically possible in Python doesn't mean it's 
always a good idea. I prefer to reserve that kind of behavior for when 
the effective behavior of an object needs to change after it's been 
created. Here you know at creation time which type you want, so it makes 
sense to me to create exactly that kind of object. Otherwise you are 
obscuring your program's structure by using dynamic type modification 
unnecessarily.

Just my $0.02, others will have different opinions.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From vodela.sai at gmail.com  Tue Aug  7 14:05:14 2007
From: vodela.sai at gmail.com (Rohan)
Date: Tue, 07 Aug 2007 18:05:14 -0000
Subject: Dealing with multiple excel sheets
Message-ID: <1186509914.117596.249330@j4g2000prf.googlegroups.com>

Hello,
I would like to write a script which does the following job.
Take column1 and 7 from 10 different excel sheets and pasthe them into
a new excel worksheet.
Any ideas on how to do it
Thanks,



From CarpeSkium at gmail.com  Sun Aug 19 21:54:57 2007
From: CarpeSkium at gmail.com (CarpeSkium at gmail.com)
Date: Mon, 20 Aug 2007 01:54:57 -0000
Subject: question
In-Reply-To: <fa4pn7$5sh$03$1@news.t-online.com>
References: <1187373737.410546.70930@w3g2000hsg.googlegroups.com>
	<fa4pn7$5sh$03$1@news.t-online.com>
Message-ID: <1187574897.183659.22140@l22g2000prc.googlegroups.com>

On Aug 17, 2:34 pm, Peter Otten <__pete... at web.de> wrote:
>  CarpeSk... at gmail.com wrote:
> > "I've parsed a webpage into a text file. In doing so, I've kept all
> > the text I'm interested in, and removed all the text I don't want. My
> > result is a text file that iscomma-separated. However, the text file
> > is one, very long, single string. I need to substitute every eighth
> > (8th)commawith a new line ("\n"). I've tried regular expressions,
> > but don't know how to make this happen on only every eighthcomma. I'd
> > post my code, but none of it works. Thanks for the help."
> >>> text = "aaa," * 20
> >>> from itertools import cycle, groupby
> >>> print "\n".join(",".join(g) for k, g in groupby(text.split(","),
>
> ...     key=lambda key, c=cycle([True]*8+[False]*8): c.next()))
> aaa,aaa,aaa,aaa,aaa,aaa,aaa,aaa
> aaa,aaa,aaa,aaa,aaa,aaa,aaa,aaa
> aaa,aaa,aaa,aaa,
>
> :-)
>
> Peter

Thanks Peter. I'll try that first thing Monday morning when I'm back
to work. It
is a totally different approach than what I was trying with regex.

And Shawn, I didn't post any of my work because the network I work on
isn't
connected to the internet. So it didn't seem constructive to re-type
all of my
failed code just to satisfy your "standards" of proving that I've been
trying to
hack this myself for the past few days. All in all, thanks for your,
uhhhh,
constructive comments.



From programmer.py at gmail.com  Wed Aug 15 10:39:08 2007
From: programmer.py at gmail.com (programmer.py at gmail.com)
Date: Wed, 15 Aug 2007 14:39:08 -0000
Subject: Using python for dynamic behavior from C++
In-Reply-To: <mailman.2011.1187185357.22759.python-list@python.org>
References: <mailman.2011.1187185357.22759.python-list@python.org>
Message-ID: <1187188748.960189.232920@r34g2000hsd.googlegroups.com>

On Aug 15, 8:35 am, "Jorgen Bodde" <jorgen.maill... at gmail.com> wrote:
> Hi all,
>
> I am looking into using Python to introduce dynamic behavior in my
> C++, e.g. something like a simulation where objects can interact with
> eachother. I know Python can be called from C++, but is it possible to
> call a binary compiled Python file / array from C++ ? The reason I ask
> is that if my objects call a script every tick to do something, I
> would not like to let the python interpreter recompile the same code
> over and over again.
>
> Any pointers to how I can do that?
>
> Regards,
> - Jorgen

Someone has already mentioned the documentation (http://
docs.python.org/ext/ext.html).  But in a nutshell, your code is not
`recompiled` everytime you send it to the interpreter.  Assuming you
put your code into a module, you'll do things that look a lot like
python, but only C -- for instance you'll actually import your python
module with the C function PyImport_Import.

After dancing with the guts of python for a bit, you'll really
appreciate all the magic that goes on under the hood when you type
python.  I know I did!

There are also tools to help extend python.  I like swig. (http://
www.swig.org/).  You're embedding, but hopefully you'll wise up and
realize it's better to write your app in python and drop to C when you
absolutely, positively need speed ;).

jw



From gianmt at gnome.org  Sat Aug 18 17:31:34 2007
From: gianmt at gnome.org (Gian Mario Tagliaretti)
Date: 18 Aug 2007 21:31:34 GMT
Subject: [Announce] PyGooCanvas 0.9.0
Message-ID: <46c76536$0$17942$4fafbaef@reader1.news.tin.it>

I am pleased to announce version 0.9.0 of the Python bindings for
Goocanvas.

It is available at:

https://developer.berlios.de/projects/pygoocanvas/

The bindings are updated with the new Goocanvas API

PyGooCanvas 0.9.0       (Aug 18 2007)
=================

 o Wrap goo_canvas_item_get_bounds (Gian Mario)
 o fix compilation on Solaris, patch by
  JerryYu <jijun.yu at sun.com>. Fixes LP#130106 (Gian Mario)
 o Add goocanvas.ItemSimple.get_line_width (Gian Mario)
 o Docs updated fixes LP#124921 (Gian Mario)

Blurb:
======

Goocanvas [1] is a canvas widget for GTK+, It is similar in many ways
to  FooCanvas, hence the name, but it uses cairo for rendering, it has
an optional  model/view split, and uses interfaces for items & views
(so you can easily turn any application object into a canvas item or
view).

PyGooCanvas is a wrapper which exposes the goocanvas API to the
python world.  It is fairly complete; most of the API are covered.

The documentation is done, anyway bug reports on docs are really
important to improve the documentation.

Like the GTK+ library, PyGTK and GooCanvas itself PyGooCanvas is
licensed under  the GNU LGPL, so is suitable for use in both
free software and proprietary applications.

PyGooCanvas requires:
=====================

 o Goocanvas >= 0.9.0
 o PyGObject >= 2.10.1 (2.11.3 to build the docs)
 o PyGTK >= 2.10.4
 o PyCairo >= 1.2.0

Bug reports should go to
https://launchpad.net/pygoocanvas/

[1] http://sourceforge.net/projects/goocanvas

cheers
-- 
Gian Mario Tagliaretti


From claird at lairds.us  Sat Aug 11 06:52:55 2007
From: claird at lairds.us (Cameron Laird)
Date: Sat, 11 Aug 2007 10:52:55 +0000
Subject: The Future of Python Threading
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<87ir7n4fps.fsf@benfinney.id.au>
	<1186760254.859080.137840@g12g2000prg.googlegroups.com>
	<mailman.1836.1186762424.22759.python-list@python.org>
Message-ID: <71h0p4-7hh.ln1@lairds.us>

In article <mailman.1836.1186762424.22759.python-list at python.org>,
Chris Mellon <arkanes at gmail.com> wrote:
			.
			.
			.
>There's nothing "undocumented" about IPC. It's been around as a
>technique for decades. Message passing is as old as the hills.
			.
			.
			.
... and has significant successes to boast, including
the highly-reliable and high-performing QNX real-time
operating system, and the already-mentioned language
Erlang.


From naga86 at gmail.com  Tue Aug 28 00:55:57 2007
From: naga86 at gmail.com (Nagarajan)
Date: Mon, 27 Aug 2007 21:55:57 -0700
Subject: XML File -- dictionary edit/search
In-Reply-To: <1188263724.306539.181980@y42g2000hsy.googlegroups.com>
References: <1188263724.306539.181980@y42g2000hsy.googlegroups.com>
Message-ID: <1188276957.123003.250410@q5g2000prf.googlegroups.com>

On Aug 28, 6:15 am, -b <bradfo... at gmail.com> wrote:
> I am trying to put together a python program that will be able to ask
> for a word and its definition, then save that information into an xml
> file for reference. I am not down right set on the file being in xml
> format, but xml is the first thing that comes to mind, since I do not
> want to use a MySQL database. I think xml will be easy to search and
> return a word's definition--another reason why xml comes to mind first
> after MySQL databases. Please, if you have any suggestions to what
> python-xml libraries I might use to program this small app with, then
> by all means voice your thoughts. Thank you very much for your time.

A simple yaml file might just do the trick.
Your yaml file shall look like the following:

Word-def.yaml
word1: word1's definition
word2: word2's definition
..
..
..
Use pyyaml to handle yaml files.
--------
import yaml
worddefs = yaml.load( open( "word-def.yaml", "r" ).read() )
print worddefs
--------

worddefs will be a dictionary of words (with definitions as values, of
course). You cannot get a better representation.
To add a definition, you can as well add keys to the worddefs
dictionary and use "dump" method to write to the yaml file. Or you
could just write to the file directly (as the format is simple in this
case). But I suggest former.

Did this solve your problem?


-Brevity is the soul of wit.
Nagarajan.



From enleverlesX.XmcX at XmclaveauX.com  Wed Aug 29 09:21:35 2007
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI (MVP))
Date: Wed, 29 Aug 2007 15:21:35 +0200
Subject: How to free memory ( ie garbage collect) at run time with Python
	2.5.1(windows)
References: <1188224306.863247.127890@50g2000hsm.googlegroups.com>
	<mn.dbf07d78329985f0.46195@XX.XmclaveauX.com>
Message-ID: <46d578db$0$25911$ba4acef3@news.orange.fr>

Hi! 

I've send the soft.
But, I have no news ; good news? 

@+

Michel Claveau



From ldo at geek-central.gen.new_zealand  Sun Aug 26 06:09:57 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 26 Aug 2007 22:09:57 +1200
Subject: expat error, help to debug?
References: <fak7q4$ahn$1@daniel-new.mch.sbs.de>
Message-ID: <farjd8$51g$1@lust.ihug.co.nz>

In message <fak7q4$ahn$1 at daniel-new.mch.sbs.de>, Andreas Lobinger wrote:

> Anyone any idea where the error is produced?

Do you want to try adding an EndElementHandler as well, just to get more
information on where the error might be happening?


From gagsl-py2 at yahoo.com.ar  Sun Aug  5 06:52:56 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 05 Aug 2007 07:52:56 -0300
Subject: Submit web form only client-side with Python? COM?
References: <1186257525.483524.5570@j4g2000prf.googlegroups.com>
	<7xmyx7ot0c.fsf@ruckus.brouhaha.com> <46B4FAFF.205@jayloden.com>
Message-ID: <op.twk1uiqpx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sat, 04 Aug 2007 19:17:35 -0300, Jay Loden <python at jayloden.com>  
escribi?:

> Paul Rubin wrote:
>> goldtech <goldtech at worldpost.com> writes:
>>> So I can present the user with an HTML form in it - but how can I
>>> write the form data to a local file on my work station?
>>
>> The simplest way is with the cgi and CGIHTTPServer modules.  You'd
>> write your form in an html file, with the target set to a Python
>
> CGIHTTPServer is not available on Windows (OP said they are on Win XP)

CGIHTTPServer does work on Windows (even on Python 2.1, as far as I can  
go) and using it might be simple enough.

> due to
> use of fork and exec to execute the CGI.

CGIHTTPServer uses popen2 or popen3 if available.

> I suggested a few other options in my
> reply, but unfortunately CGIHTTPServer is not an option for this task.

I can't see any other reply from you on this thread... (I'm using the  
gmane newsgroup interfase)

-- 
Gabriel Genellina



From arkanes at gmail.com  Fri Aug 31 17:25:00 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 31 Aug 2007 16:25:00 -0500
Subject: reload() gone?
In-Reply-To: <1188594335.231732.314960@g4g2000hsf.googlegroups.com>
References: <mailman.227.1188583814.28954.python-list@python.org>
	<1188594335.231732.314960@g4g2000hsf.googlegroups.com>
Message-ID: <4866bea60708311425n6643c8c5hb11c7aedeabaaa56@mail.gmail.com>

On 8/31/07, Arnaud Delobelle <arnodel at googlemail.com> wrote:
> On Aug 31, 7:10 pm, "Bernard Lebel" <3dbern... at gmail.com> wrote:
> > I read in the Python 3.0 documentation that reload() was removed,
> > without further explanations.
> >
> > http://docs.python.org/dev/3.0/whatsnew/3.0.html?highlight=reload
> >
> > So what are we supposed to do to reload modules?
> >
> PEP 3100 says: use exec() instead.
>

However, it provides no information on how to do this. exec("import
foo") doesn't do it. exec(open(foo.__file__)) doesn't work either, but
that might just be teething problems (open returns a TextIOWrapper
object which exec doesn't identify as a file).

exec(open(foo.__file__).read(), foo.__dict__) was the best I could
come up with. That's frigging horrible, and it won't work unless
you've got access to the actual python source file of the module.


From hhygcy at gmail.com  Sun Aug 12 22:09:05 2007
From: hhygcy at gmail.com (Ge Chunyuan)
Date: Sun, 12 Aug 2007 19:09:05 -0700
Subject: which IDE is highly recommended in Windows OS
Message-ID: <1186970945.403792.51790@d55g2000hsg.googlegroups.com>

hi Group:

I am a new comer for Python, I wonder which IDE is recommended in
Windows OS.
Can anyone give some suggestion.


Thanks indeed
Ge Chunyuan



From sln at netherlands.co  Fri Aug  3 22:25:49 2007
From: sln at netherlands.co (sln at netherlands.co)
Date: Fri, 03 Aug 2007 19:25:49 -0700
Subject: I am giving up perl because of assholes on clpm -- switching to
	Python
References: <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d@giganews.com>
	<techa3pi8ekksd2fioe4j72gadfc9omhmh@4ax.com>
Message-ID: <5jo7b397msj7glg6kle90mh2kk1lob6292@4ax.com>

On Thu, 26 Jul 2007 14:56:13 GMT, zentara <zentara at highstream.net> wrote:

>On Wed, 25 Jul 2007 14:45:29 -0500, Martha_Jones at tx.net wrote:
>
>>Python is a better language, with php support, anyway, but I am fed up
>>with attitudes of comp.lang.perl.misc. Assholes in this newsgroup ruin
>>Perl experience for everyone. Instead of being helpful, snide remarks,
>>back-biting, scare tactings, and so on proliferate and self
>>reinforce. All honest people have left this sad newsgroup. Buy bye,
>>assholes, I am not going to miss you!!!
>>
>>Martha
>

>sihT si erehw eht gib syob yalp, uoy evah ot eb elba ot eb elba ot
>elffucs dna ekat tnemhsinup fi uoy era gnorw ro yludnu tnarongi.
>uoY osla deen ot hsauqs wohemos ohw skcatta uoy, nehw uoy
>wonk uoy era thgir.
>
>I saw gnihctaw a CBNC yadretsey, dna yeht deweivretni a gnidael
>ralos lenap ynapmoc's OEC. enO yug tsuj detsalb mih rof on nosaer
>rehto naht eh steg a tnemnrevog ydisbus, dna neve eht rotaredom tlef
>dab rof eht yaw eht evitucexe saw detsalb. TUB...... yeht era eht gib
>syob, gniyalp rof laer yenom, dna fi uoy yalp ereht, uoy evah ot tcepxe
>ot evah ruoy ssenhguot detset..... ti snaem laer tiforp dna ssol.
>
>fI uoy tnaw a retteb ecalp ot ksa rennigeb snoitseuq, ro ot eb detaert
>htiw erom tcepser, yrt eht lrep-srennigeb tsilliam ro
>ptth://sknomlrep.gro.  ehT sknom era yllausu yrev etilop.
>
> 
>aratnez

There you go again, always twisting things around.
A little hatred is good for the world, grow some balls, if it hurts
that much, cut your throat, not somebody elses.

Sln




From db3l.net at gmail.com  Wed Aug 29 16:18:30 2007
From: db3l.net at gmail.com (David Bolen)
Date: Wed, 29 Aug 2007 16:18:30 -0400
Subject: Unzip: Memory Error
References: <1188413939.834662.193180@y42g2000hsy.googlegroups.com>
Message-ID: <m21wdmgkmh.fsf@valheru.db3l.homeip.net>

mcl <mcl.office at googlemail.com> writes:

> I am trying to unzip an 18mb zip containing just a single 200mb file
> and I get a Memory Error.  When I run the code on a smaller file 1mb
> zip, 11mb file, it works fine.
(...)
> def unzip_file_into_dir(file, dir):
> 	#os.mkdir(dir, 0777)
> 	zfobj = zipfile.ZipFile(file)
> 	for name in zfobj.namelist():
> 		if name.endswith('/'):
> 			os.mkdir(os.path.join(dir, name))
> 		else:
> 			outfile = open(os.path.join(dir, name), 'wb')
> 			outfile.write(zfobj.read(name))
> 			outfile.close()

The "zfobj.read(name)" call is reading the entire file out of the zip
into a string in memory.  It sounds like it's exceeding the resources
you have available (whether overall or because the Apache runtime
environment has stricter limits).

You may want to peek at a recent message from me in the "Unable to
read large files from zip" thread, as the suggestion there may also be
suitable for your purposes.

http://groups.google.com/group/comp.lang.python/msg/de04105c170fc805?dmode=source
-- David


From steve at holdenweb.com  Thu Aug 16 16:58:43 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Aug 2007 16:58:43 -0400
Subject: ploting issues in program
In-Reply-To: <fa22ae$6n7$01$1@news.t-online.com>
References: <1187250500.571837.196940@19g2000hsx.googlegroups.com>	<fa10su$rf2$02$1@news.t-online.com>	<mailman.2052.1187263908.22759.python-list@python.org>
	<fa22ae$6n7$01$1@news.t-online.com>
Message-ID: <fa2dpv$n1g$1@sea.gmane.org>

Peter Otten wrote:
> Steve Holden wrote:
> 
>> I might ask just exactly what is being plotted to give those answers. It
>> sounds like field strength, but I am having difficulty envisaging a
>> field that is weakest at its center - is this some sort of alternative
>> universe you are plotting :-) ?
> 
> I believe the OP is trying to plot a radiation pattern like Figure 4.5 on
> the following page:
> 
> http://www.vias.org/wirelessnetw/wndw_06_05_05.html
> 
Right, it's a relative field strength plot. Now I see. Thanks.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
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From bronger at physik.rwth-aachen.de  Sun Aug 26 11:36:05 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sun, 26 Aug 2007 17:36:05 +0200
Subject: my parser.py isn't imported
Message-ID: <874pimqpei.fsf@wilson.homeunix.com>

Hall?chen!

I have a module parser.py in the same directory as the main module.
In the main module, I import "parser".  On Linux, this works as
expected, however on Windows, it imports the stdlib parser module.
sys.path[0] points to the directory of my parser.py in both cases.
What went wrong here?

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From python at jayloden.com  Mon Aug 20 17:41:09 2007
From: python at jayloden.com (Jay Loden)
Date: Mon, 20 Aug 2007 17:41:09 -0400
Subject: reading a line in file
In-Reply-To: <2dc0c81b0708201335m1a158176o9ea456778d2a8597@mail.gmail.com>
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>	<2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com>	<93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx>	<2dc0c81b0708201207p7f83f2e0l6de15fd70be252a5@mail.gmail.com>	<93066C069973ED448DC2BCEA9C44A7383BE2B6@efmailx>	<46C9F561.50405@jayloden.com>	<2dc0c81b0708201314q727ca3a1s12bef74a25b20abc@mail.gmail.com>	<46C9F88A.9090400@jayloden.com>
	<2dc0c81b0708201335m1a158176o9ea456778d2a8597@mail.gmail.com>
Message-ID: <46CA0A75.2060401@jayloden.com>

Shawn Milochik wrote:
> Although you're technically correct, I think there's a knee-jerk
> anti-regex reaction, citing the meaningless overhead. If you're
> running many thousands of records or something then it becomes a small
> issue compared to a replace statement or something. But in most cases
> it makes no difference at all.
> 
> Run the example script both ways and I'm sure there will be no
> difference, and I prefer a clear regex to a convoluted (in my opinion)
> substring call.
> 
> In any case, it's a preference, and I have never seen anything which
> convinced me that one should avoid regexes at all costs unless there's
> no other way to do it.
> 
> And the comment about solving a problem by using regular expressions
> creating another problem is just asinine.  Like so many other things,
> it's often repeated without any thought about whether it is true in
> general, much less in the situation in question.

I agree that in an extremely trivial example, it doesn't matter which method you use. Using a regex in this instance is *very* slightly slower in a single execution and isn't something anyone would notice. However, if the script is run multiple times, that increases. e.g. over 1000 iterations, avoiding regexes even in this trivial example saves ~10 seconds. The example is/was trivial. If the real-life scenario is truly as inconsequential, then it won't matter. However, I've seen a great many instances in my life where similarly tiny details have come back to bite someone (myself included) later. 

As an example, I once coded a simple database query script that took less than a second to run, and all was well - until that was being used to query status for hundreds of items individually to generate a report. When those < 1s run times piled up on top of each other and resulted in 15-20 *minute* run times. Making a simple change to the query which seemed unnecessary in the smaller case ended up reducing that 15m run time to a few seconds.

There are plenty of reasons to use regular expressions, and you're also right that avoiding them at all costs isn't always the right approach either. There's no universal solution to any problem, which is what was all that was meant by my original comment. If you assume the regular expressions are always the solution, then you may well miss a much faster, more efficient, more elegant, or readable solution. Conversely, ignoring regular expressions when they *are* the most efficient, elegant, and logical way to solve a problem is asinine, to borrow your phrasing.

I hope you don't feel I was picking on you - or on regular expressions for that matter! I was attempting only to offer another helpful solution that was possibly easier to read for someone not familiar with regular expressions, and a little bit faster in the event that multiple repetitions were required or the task itself was larger than indicated in the OP's description.

-Jay


From steven.bethard at gmail.com  Sun Aug 12 15:14:52 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 12 Aug 2007 13:14:52 -0600
Subject: is there anybody using __del__ correctly??
In-Reply-To: <1186895084.388293.295330@57g2000hsv.googlegroups.com>
References: <1186731369.073644.158490@z24g2000prh.googlegroups.com>
	<1186762908.121319.35900@x35g2000prf.googlegroups.com>
	<SradnX_-hI91BiHbnZ2dnUVZ_r6rnZ2d@comcast.com>
	<1186895084.388293.295330@57g2000hsv.googlegroups.com>
Message-ID: <0M2dnWsFO7-zwSLbnZ2dnUVZ_ryqnZ2d@comcast.com>

Michele Simionato wrote:
> On Aug 10, 7:09 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
>> There were also a few recipes posted during this discussion that wrap
>> weakrefs up a bit nicer so it's easier to use them in place of __del__:
>>
>> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/519635
> 
> I knew about your recipe and I thought it was clever, *very*
> clever. I have been thinking about it a bit more today and
> here is an alternative, which does not require metaclasses,
> does not require descriptors, and does not require the user to
> declare the attributes she will use in the __finalize__ method.
> Warning: it is no more tested than the test case in your recipe:
> 
> import weakref
> 
> _get = object.__getattribute__
> _set = object.__setattr__
> _del = object.__delattr__
> 
> def getinnerobj(self):
>     return _get(self, '*innerobj*')
> 
> class Impostor(object):
>     "It tries very hard to impersonate the inner object"
>     def __init__(self, obj):
>         _set(self, '*innerobj*', obj)
>     def __getattribute__(self, name):
>         return getattr(getinnerobj(self), name)
>     def __setattr__(self, name, value):
>         _set(getinnerobj(self), name, value)
>     def __delattr__(self, name):
>         _del(getinnerobj(self), name)
> 
> _refset = set()
> 
> class Finalized(object):
>     def __new__(cls, *args, **kw):
>         self = super(Finalized, cls).__new__(cls, *args, **kw)
>         self.__init__(*args, **kw)
>         def finalize(ref, refset=_refset):
>             refset.remove(ref)
>             cls.__finalize__(self)
>         fake = Impostor(self)
>         _refset.add(weakref.ref(fake, finalize))
>         return fake
>     def __finalize__(self):
>         pass

The problem here is that __getattribute__ doesn't work for things like 
__getitem__.  So the fake object can't properly delegate these::

     >>> class C(Finalized):
     ...     def __getitem__(self, key):
     ...         return key
     ...
     >>> c = C()
     >>> c[1]
     Traceback (most recent call last):
       File "<interactive input>", line 1, in <module>
     TypeError: 'Impostor' object is unindexable

AFAIK, with new-style classes, there is no way to do this kind of 
delegation properly.

STeVe


From half.italian at gmail.com  Tue Aug 28 23:01:10 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: Tue, 28 Aug 2007 20:01:10 -0700
Subject: Newbie question - sorting a slice
In-Reply-To: <1188355395.424913.90480@19g2000hsx.googlegroups.com>
References: <1188355395.424913.90480@19g2000hsx.googlegroups.com>
Message-ID: <1188356470.869617.221180@q4g2000prc.googlegroups.com>

On Aug 28, 7:43 pm, hwg <hwg... at yahoo.com> wrote:
> I've searched the group and didn't see the answer to this...
>
> Why doesn't this work?:
>
> >>> letters = ['d', 'a', 'e', 'c', 'b']
> >>> letters[1:3].sort()
>
> This returns None.
>
> Why?  letters[1:3]  is  ['a', 'e', 'c']    Sorting that should return
> ['a', 'c', 'e']
>
> hwg

sort() works on a list in place, and returns none

You have to make a temp list.

note...
>>> letters = ['d', 'a', 'e', 'c', 'b']
>>> print letters.sort()
None
>>> print letters
['a', 'b', 'c', 'd', 'e']

~Sean



From marc.wyburn at googlemail.com  Wed Aug 22 12:24:39 2007
From: marc.wyburn at googlemail.com (marc wyburn)
Date: Wed, 22 Aug 2007 16:24:39 -0000
Subject: Python for web development ...
In-Reply-To: <1187799217.054726.109380@z24g2000prh.googlegroups.com>
References: <1187799217.054726.109380@z24g2000prh.googlegroups.com>
Message-ID: <1187799879.413633.187310@x40g2000prg.googlegroups.com>

On Aug 22, 5:13 pm, thushiantha... at gmail.com wrote:
> Hi everyone,
>
> I have to do a web based application for my final year project. Since,
> i am only familiar with basic HTML and Java Script, i am totally new
> to this one. My friends are using LAMP (P->PHP). But i want to use
> Python. Is it possible to use Python with Apache and MySQL. Is it
> possible ? Any websites/books ?
>
> Thank you

there are a number of ways to do it.  I've used mod_python embedded
into Apache and it worked well and I found it easy to pick up and
advanced enough to do pretty much whatever I wanted.  There are in
depth docs and tutorials on the mod_python page. You could also look
at a preconfigured stacks like Turbogears or Django although they may
have many features you don't need.  Have a look at
http://wiki.python.org/moin/WebFrameworks



From david at asdf.asdf  Fri Aug 24 00:50:00 2007
From: david at asdf.asdf (bambam)
Date: Fri, 24 Aug 2007 14:50:00 +1000
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
Message-ID: <13csoronscqp7d2@corp.supernews.com>

Thank you, so generallizing:

(1) Python re-evaluates the loop range on every loop, and
(2) Python does short-circuit evaluation of conditions, in predictable 
order.

Sorry about the bad question.


"Zentrader" <zentraders at gmail.com> wrote in message 
news:1187898049.734696.9500 at l22g2000prc.googlegroups.com...
> Does page count change? i.e. is it necessary to retrieve it in every
> loop or
> tempList = ['1','2','3','4','5','6','7','8']
> sampleList=[]
> page_count = self.parent.GetPageCount()
> <snipped>
>     for i in range(page_count):
>
> Also, once pagefound is set to True, all pages following will not be
> appended to sampleList because it is not initialized to False under
> the "for i in range(self.parent.GetPageCount())" loop.
>
> Finally, if I understand the logic and question correctly, you want
> something like
> tempList = ['1','2','3','4','5','6','7','8']
> sampleList=[]
> page_count = self.parent.GetPageCount()
> for port in tempList:
>    for i in range(page_count):
>        page=self.parent.GetPage(i)
>        if (hasattr(page, "port")) and (page.port != int(port)) :
>            sampleList.append(port)
>
> or perhaps (I'm not sure)
> tempList = [1, 2, 3, 4, 5, 6, 7, 8]
> sampleList=[]
> page_count = self.parent.GetPageCount()
> for i in range(page_count):
>        page=self.parent.GetPage(i)
>        if (hasattr(page, "port")) and (page.port not in tempList) :
>            sampleList.append(port)
> HTH
> 




From manasd at gmail.com  Thu Aug  9 22:34:37 2007
From: manasd at gmail.com (MD)
Date: Thu, 09 Aug 2007 19:34:37 -0700
Subject: Does PyModule_GetDict return information about class method variables?
Message-ID: <1186713277.019869.265820@d30g2000prg.googlegroups.com>

Hi,

   I have a variable which is defined inside a class method. When I
call PyModule_GetDict on the module containing this class, the
dictionary doesn't contain any information about this variable. Is
this expected behavior? If so, what options do I have to access this
variable from my Python C extension.

Thanks and Regards,
-MD



From frank at chagford.com  Mon Aug 20 03:02:47 2007
From: frank at chagford.com (Frank Millman)
Date: Mon, 20 Aug 2007 00:02:47 -0700
Subject: Newbie question about a web server
Message-ID: <1187593367.402094.235410@g4g2000hsf.googlegroups.com>

Hi all

I have just started to dabble in writing my own web server.

I googled for 'python web server', and this is the first hit -

    http://fragments.turtlemeat.com/pythonwebserver.php

It has the source code for a simple web server, based on HTTPServer
and BaseHTTPRequestHandler.

It demonstrates the concepts of
  - returning a static page
  - constructing and returning a dynamic page
  - sending a form with a POST method, and responding to the result

I typed it in and ran it, and it 'just worked', with one exception.

When responding to the initial request, it sends a 200 response,
followed by a content-type header, followed by an html page. This
works fine.

When responding to the POST data received, it sends a 301 response, no
headers, and then the html page.

This works with a Firefox browser on Linux, but MSW IE6 displays 'the
page cannot be displayed'.

According to the notes, "You don't have to know much about the HTTP
protocol at all. Except some basic that when the client request
something it is a "GET", and when the client sends something it is in
our case a POST. Some basic responce codes like 200 is OK for GET, and
404 is file not found, 301 is OK for a Post."

I googled for 'http response code 301', and found that it is actually
a redirection code. It seems that the notes are misleading.

So I guess my questions are -
  1. what is the correct response for a POST?
     I think the answer is 200.
     However, I assume the author is trying to demonstrate a
particular technique.
     Can anyone explain what that may be.
  2. why does the above work with Firefox?

TIA for any enlightenment.

Frank Millman



From david at boddie.org.uk  Fri Aug 24 09:22:45 2007
From: david at boddie.org.uk (David Boddie)
Date: Fri, 24 Aug 2007 15:22:45 +0200
Subject: Co-developers wanted: document markup language
Message-ID: <200708241522.45809.david@boddie.org.uk>

On Fri Aug 24 11:04:33 CEST 2007, Torsten Bronger wrote:

> Paul Rubin writes:
> 
> > TeX/LateX have been around forever and are well established
> > standards, as awful as they are.  Why do we want ANOTHER markup
> > language?
> 
> Well, because they are awful.  ;-)  I don't see that there is a
> bunch of already existing projects, in fact, I don't see anyone
> challenging LaTeX at all.  However, competition is a good thing, and
> I think there are enough aspects about LaTeX that can be done better
> so that this project is worth being done.

There are alternatives to LaTeX if you are prepared to look for them.
One of these is Lout:

  http://lout.sourceforge.net/

Another option is to use TeX, but with Python as an alternative "macro
language":

  http://www.pytex.org/

David


From pablo.mitchell at gmail.com  Sat Aug  4 14:07:59 2007
From: pablo.mitchell at gmail.com (pablo.mitchell at gmail.com)
Date: Sat, 04 Aug 2007 11:07:59 -0700
Subject: Efficient Rank Ordering of Nested Lists
In-Reply-To: <1i29gpw.1vh7eku1iauistN%aleax@mac.com>
References: <1186104049.022836.253470@e9g2000prf.googlegroups.com>
	<1i29gpw.1vh7eku1iauistN%aleax@mac.com>
Message-ID: <1186250879.733368.169340@j4g2000prf.googlegroups.com>

On Aug 3, 8:38 am, al... at mac.com (Alex Martelli) wrote:
> pablo.mitch... at gmail.com <pablo.mitch... at gmail.com> wrote:
> > A naive approach to rank ordering (handling ties as well) of nested
> > lists may be accomplished via:
>
> >    def rankLists(nestedList):
> >       def rankList(singleList):
> >           sortedList = list(singleList)
> >           sortedList.sort()
> >           return map(sortedList.index, singleList)
> >       return map(rankList, nestedList)
>
> >    >>> unranked = [ [ 1, 2, 3, 4, 5 ], [ 3, 1, 5, 2, 4 ], [ -1.1, 2.2,
> > 0, -1.1, 13 ] ]
> >    >>> print rankLists(unranked)
>
> >    [[0, 1, 2, 3, 4], [2, 0, 4, 1, 3], [0, 3, 2, 0, 4]]
>
> > This works nicely when the dimensions of the nested list are small.
> > It is slow when they are big.  Can someone suggest a clever way to
> > speed it up?
>
> Each use of sortedList.index is O(N) [where N is len(singleList)], and
> you have N such uses in the map in the inner function, so this approach
> is O(N squared).  Neil's suggestion to use bisect replaces the O(N)
> .index with an O(log N) search, so the overall performance is O(N log N)
> [[and you can't do better than that, big-O wise, because the sort step
> is also O(N log N)]].
>
> "beginner"'s advice to use a dictionary is also good and may turn out to
> be faster, just because dicts are SO fast in Python -- but you need to
> try and measure both alternatives.  One way to use a dict (warning,
> untested code):
>
>   def rankList(singleList):
>       d = {}
>       for i, item in reversed(enumerate(sorted(singleList))):
>           d[item] = i
>       return [d[item] for item in singleList]
>
> If you find the for-clause too rich in functionality, you can of course
> split it up a bit; but note that you do need the 'reversed' to deal with
> the corner case of duplicate items (without it, you'd end up with 1s
> instead of 0s for the third one of the sublists in your example).  If
> speed is of the essence you might try to measure what happens if you
> replace the returned expression with map(d.__getitem__, singleList), but
> I suspect the list comprehension is faster as well as clearer.
>
> Another potential small speedup is to replace the first 3 statements
> with just one:
>
> d = dict((item,i) for i,item in reversed(enumerate(sorted(singleList))))
>
> but THIS density of functionality is a bit above my personal threshold
> of comfort ("sparse is better than dense":-).
>
> Alex

Thanks for breaking it down so thoroughly.  I try the different
recipes and see which gives the best trade offs between readability
and performance.  Agreed that dict() approach looks promising.



From bronger at physik.rwth-aachen.de  Thu Aug 23 13:29:49 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 23 Aug 2007 19:29:49 +0200
Subject: Co-developers wanted: document markup language
Message-ID: <87odgyyx9u.fsf@wilson.homeunix.com>

Hall?chen!

Some LaTeX users in Aachen thought about a general-use markup
language this spring.  I wrote some code and a rough project
description, however, we could need some help.

If you are interested, visit the provisional project page at
http://latex-bronger.sourceforge.net/gummi/

Tsch?,
Torsten.

Crosspost & Followup-To: comp.lang.python
-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From siddharthamca at yahoo.co.in  Fri Aug 31 03:14:34 2007
From: siddharthamca at yahoo.co.in (siddhatha veedaluru)
Date: Fri, 31 Aug 2007 12:44:34 +0530 (IST)
Subject: Do you have any complete example for creating msi file(doing file
	copying)
Message-ID: <969791.6185.qm@web7608.mail.in.yahoo.com>

Thank you for the help that you  are going to give me.
 
I have a project where in which i want to create a msi file just as python-package while installing python on the system. Just copying the files to the user given target directory.
 
i want to create similar msi file for my project that just copies the file.
 
Can you please help me in providing the complete procedure of creating the msi file using the python.
 
Does msilib library in the release 2.5 have this capability?
 
Please help me
Thanks
Sid


      Unlimited freedom, unlimited storage. Get it now, on http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/
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From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Aug 14 03:23:09 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 14 Aug 2007 09:23:09 +0200
Subject: Module imports during object instantiation
In-Reply-To: <mailman.1930.1187030117.22759.python-list@python.org>
References: <mailman.1845.1186783217.22759.python-list@python.org>	<f9io6j$p80$1@daisy.noc.ucla.edu>	<1186888682.860619.258610@19g2000hsx.googlegroups.com>	<46c011b5$0$417$426a74cc@news.free.fr>
	<mailman.1930.1187030117.22759.python-list@python.org>
Message-ID: <46c15859$0$422$426a74cc@news.free.fr>

Ritesh Raj Sarraf a ?crit :
> Bruno Desthuilliers wrote:
> 
>> Ritesh Raj Sarraf a ?crit :
>>
>> The initializer will be called *each time* you instanciate the class.
>> And nothing prevents client code from calling it explicitelly as many
>> times as it wants  - ok, this would be rather strange, but this is still
>> technically possible. What I mean that you have no assurance about the
>> number of times an initializer will be called.
>>
> 
> Yes, it should be called _each time_ I do an instantiation. But the point
> is, I'm doing it only once. And I don't see people instantiating multiple
> times.

You of course don't instanciate the same object more than once !-) What 
I meant is that, while you can be reasonably confident that the 
initializer will be call at least once (on instanciation), nothing 
prevents user code to directly call it as many times he wants.

> And even if you do, it should do separate imports.

Why so ? Using the import statement, modules are only imported once for 
a given process, you know ? And FWIW, what are the chances your running 
process will move from one platform to another ?-)

> log1 = Log()
> log2 = Log()
> 
> Both the objects are separate from each other in every manner and they share
> nothing.

How can you tell ? In the common case, they at least share a pointer to 
the Log class object, and depending on the implementation they can share 
other things too.

>> wrt/ your problem, remember that top-level code is executed when the
>> module is loaded (either as a main program or as an imported module).
>> The canonical solution to os-specific imports is to handle them at the
>> top-level:
>>
>> if os.name == 'posix:
>>    from some_posix_module import get_colors
>> elif os.name in ['nt', 'dos']:
>>    from some_nt_module import get_windows_color as get_colors
>> else:
>>    get_colors = lambda: None # or any other sensible default value...
>>
>> class SomeClass(object):
>>    def __init__(self, *args, **kw):
>>      self.colors = get_colors()
> 
> This is what I'm left with to do currently. But I doubt if that makes by
> classes independent and to "Just Work". If someone was to cut/paste just
> the class, it won't work.

Obviously not. But the module is the basic unit of code in Python.

> He'll have to go through the imports and figure
> out which one relates to the class he want's to import and add similar code
> to his.

I'm afraid you're confusing import, include and cut'n'paste (which is 
probably the worst possible code-reuse technic)... If someone wants to 
reuse your code, the normal way is to import your module (and eventually 
subclass yourmodule.SomeClass to extend/customize it).



From dima.hristov at gmail.com  Sat Aug  4 09:23:49 2007
From: dima.hristov at gmail.com (dhr)
Date: Sat, 4 Aug 2007 16:23:49 +0300
Subject: the one python book
Message-ID: <f91ujm$1sh$1@sea.gmane.org>

newbie question:

Is there a 'K&R" type of Python book? The book that you'd better have on 
your shelf if you are going into Python? 





From rdm at rcblue.com  Sun Aug 12 17:49:11 2007
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 12 Aug 2007 14:49:11 -0700
Subject: A dumb question about a class
Message-ID: <20070812214927.56B1A1E400B@bag.python.org>

I'm still trying to understand classes. I've made some progress, I 
think, but I don't understand how to use this one. How do I call it, 
or any of its functions? It's from the Cookbook, at 
<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/523048>.

Thanks,

Dick Moores

=====================================================
class PrimeList:
	def __init__(self, initial=0):
		self.primelist = [2,3]
		self.primelookup = [0,0,1,1]
		self.max_prime = 3
		self.grow_primelist(initial)

	def grow_primelist(self,number):
		newprimes = []
		while self.max_prime <= number:
			next = self.nextprime()
			newprimes.append(next)
			self.max_prime = next
			size_difference = self.max_prime - len(self.primelookup) + 1
			self.primelookup.extend([0] * size_difference)
		for i in newprimes:
			self.primelookup[i]=1
	
	def contains(self,number):
		if number < 2:
			return 0
		if number > len(self.primelookup) - 1:
			self.grow_primelist(number)
			return self.primelookup[number]
		return self.primelookup[number]
	
	def nextprime(self):
		i = self.max_prime + 2
		while 1:
			isprime = True
			for prime in self.primelist:
				if i % prime == 0:
					isprime = False
					i += 2
					break
			if isprime:
				self.primelist.append(i)
				return(i)
======================================================



From ed at leafe.com  Fri Aug  3 12:35:25 2007
From: ed at leafe.com (Ed Leafe)
Date: Fri, 3 Aug 2007 12:35:25 -0400
Subject: (no) fast boolean evaluation ?
In-Reply-To: <46b35069$0$17822$426a74cc@news.free.fr>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<cfb58d850708021619s298f69b9p3af86905d1695939@mail.gmail.com>
	<mailman.1551.1186099243.22759.python-list@python.org>
	<46b2e56b$0$18879$426a74cc@news.free.fr>
	<pan.2007.08.03.14.24.23.227662@REMOVE.THIS.cybersource.com.au>
	<46b35069$0$17822$426a74cc@news.free.fr>
Message-ID: <DC3CED48-3B8E-4A69-9E1B-D3444D6C9E03@leafe.com>

On Aug 3, 2007, at 11:57 AM, Bruno Desthuilliers wrote:

> Sorry, I forgot to mention the language did not allow to have else  
> & if
> in the same statement. IOW :
>
> if some_condition then
>    do_sometehing
> else
>    if some_other_condition then
>      do_something_else
>    else
>      if yet_another_condition then
>        do_yet_another_thing
>      else
>        if your_still_here then
>           give_up('this language is definitively brain dead')
>        end if
>      end if
>    end if
> end if

	Usually that's because the language provides a switch/case statement  
construct. If it does and you try to write the above code, it isn't  
the language that's brain-dead!  ;-)

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com




From istvan.albert at gmail.com  Wed Aug  8 15:11:11 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Wed, 08 Aug 2007 19:11:11 -0000
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <slrnfbk05n.20o.horpner@FIAD06.norwich.edu>
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
	<eICti.37400$G23.15165@newsreading01.news.tds.net>
	<41Dti.37401$G23.10727@newsreading01.news.tds.net>
	<1186582066.096793.14700@57g2000hsv.googlegroups.com>
	<slrnfbk05n.20o.horpner@FIAD06.norwich.edu>
Message-ID: <1186600271.858692.182090@22g2000hsm.googlegroups.com>

On Aug 8, 2:00 pm, Neil Cerutti <horp... at yahoo.com> wrote:

> I thought, in fact, that open was on more shaky ground. ;)

yeah, that too ...

> I can't find any evidence of that in the PEPs. Do you have a reference?

here is something:

http://svn.python.org/view/python/branches/p3yk/Misc/NEWS?rev=56685&view=auto

look for :

- Removed these Python builtins:
  apply(), callable(), coerce(), file(), reduce(), reload()

i.



From __peter__ at web.de  Wed Aug  8 16:28:59 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 08 Aug 2007 22:28:59 +0200
Subject: How can I programmatically find the name of a method from within
	that method?
References: <1186548312.672360.259100@q3g2000prf.googlegroups.com>
	<mailman.1727.1186549847.22759.python-list@python.org>
	<1186557384.845276.151630@i13g2000prf.googlegroups.com>
	<f9br51$e9a$01$1@news.t-online.com>
	<1186603550.882122.223340@d55g2000hsg.googlegroups.com>
Message-ID: <f9d92f$8qe$02$1@news.t-online.com>

Tony wrote:

> Is this cheating?

Isn't it harder to calculate the magic indices than just writing down the
names twice?
 
> class a:
> ????????def square(self, x):
> ????????????????print 'executing:', dir(self)[-1]
> ????????????????print x*x
> ????????def cube(self, x):
> ????????????????print 'executing:',?????dir(self)[-2]
> ????????????????print x*x*x
> 
> b=a()
> b.square(3)
> b.cube(3)
> Output:
> 
> PyMate r6780 running Python 2.3.5 (python)
> >>> function self naming2.py
> 
> executing: square
> 9
> executing: cube
> 27

> Is this cheating?

No, just wrong.

>> class A:
...     def alpha(self): return dir(self)[-2]
...     def gamma(self): return dir(self)[-1]
...
>>> a = A()
>>> a.alpha(), a.gamma()
('alpha', 'gamma')
>>> a.beta = 42
>>> a.alpha(), a.gamma()
('beta', 'gamma')

Peter


From gagsl-py2 at yahoo.com.ar  Tue Aug 21 22:41:37 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 21 Aug 2007 19:41:37 -0700
Subject: Trouble with CGI code from Code Example 7.3 of the "Python
	Interactive CGI Tutorial"
In-Reply-To: <mailman.88.1187738363.32294.python-list@python.org>
References: <1187705685.007927.55030@z24g2000prh.googlegroups.com>
	<1187710122.354087.158910@o80g2000hse.googlegroups.com>
	<mailman.88.1187738363.32294.python-list@python.org>
Message-ID: <1187750497.230983.241120@m37g2000prh.googlegroups.com>

On 21 ago, 20:10, Steve Holden <st... at holdenweb.com> wrote:
> Gabriel Genellina wrote:
>
> [...]working crystall balls are hard to find nowadays :)
>
> Well, judging by the OP's response you appear to be in possession of a
> pair :-)

Great-grandmother's legacy, and not for sale!

--
Gabriel Genellina



From iapain at gmail.com  Fri Aug 31 12:40:22 2007
From: iapain at gmail.com (iapain)
Date: Fri, 31 Aug 2007 16:40:22 -0000
Subject: escaping only double quotes
In-Reply-To: <1188575379.041219.177910@19g2000hsx.googlegroups.com>
References: <1188575379.041219.177910@19g2000hsx.googlegroups.com>
Message-ID: <1188578422.030447.106880@r23g2000prd.googlegroups.com>


> string = "Butler's 15\" TV"
> s = """my string goes here "%s" """ % string

Couldn't find anything wrong in

string = "Butler's 15\" TV"
s = "my string goes here %s" % string



From aclarke11 at yahoo.co.uk  Tue Aug  7 17:51:30 2007
From: aclarke11 at yahoo.co.uk (Tony)
Date: Tue, 07 Aug 2007 14:51:30 -0700
Subject: Heterogeneous lists
In-Reply-To: <f9aiso$b99$1@nemesis.news.tpi.pl>
References: <RPadnXFHmYYUIiXbnZ2dnUVZ_uKpnZ2d@comcast.com>
	<46b8cbdf$0$6956$426a74cc@news.free.fr>
	<f9aiso$b99$1@nemesis.news.tpi.pl>
Message-ID: <1186523490.667143.128880@19g2000hsx.googlegroups.com>

On Aug 7, 8:53 pm, Jarek Zgoda <jzg... at o2.usun.pl> wrote:
.
>
> I love my lists of classes. I know, I'll go to hell for that.
>
> --
> Jarek Zgodahttp://jpa.berlios.de/

And I love my shelved lists of classes..

Tony



From programmer.py at gmail.com  Wed Aug 15 10:46:13 2007
From: programmer.py at gmail.com (programmer.py at gmail.com)
Date: Wed, 15 Aug 2007 14:46:13 -0000
Subject: ming on win32 anyone ? [help a noob]
In-Reply-To: <%QCwi.14541$rr5.1213@newsfe1-win.ntli.net>
References: <%QCwi.14541$rr5.1213@newsfe1-win.ntli.net>
Message-ID: <1187189173.036327.65360@r29g2000hsg.googlegroups.com>

On Aug 15, 8:03 am, "daz.diamond" <s... at spam.com> wrote:
> hoping someone can help ...
>
> how do I install ming (with python) on win32? have downloaded the tar.gz
> of ming-0.3.0 which doesn't have a handy self-installer, and I'm
> absolutely foxed as to what to do next ... the install instructions in
> the package seem to be linux oriented, which to me may as well be in greek
>
> any clues much appreciated, thx
>
> daz

I don't know what you've downloaded, but it does not sound like the
right thing, err ming.  The installer found here is 5.1.3.
http://sourceforge.net/project/showfiles.php?group_id=2435

Maybe you should consider cygwin?

jw



From kyosohma at gmail.com  Sat Aug 18 09:54:34 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Sat, 18 Aug 2007 13:54:34 -0000
Subject: Canceling events on COM Objects in python
In-Reply-To: <8Yuxi.5292$924.612@newssvr23.news.prodigy.net>
References: <8Yuxi.5292$924.612@newssvr23.news.prodigy.net>
Message-ID: <1187445274.964435.267010@q4g2000prc.googlegroups.com>

On Aug 17, 11:54 pm, Oliver Nelson <oli... at ootbc.com> wrote:
> I have MapPoint working in Python, and I'm trying to cancel events on
> the map, but I can't seem to make that happen.  I'm responding to the
> events successfully in my panel object.  My code is like this:
>
> global MapPointMod
> MapPointMod =
> win32com.client.gencache.EnsureModule("{51C0A9CA-F7B7-4F5A-96F4-43927C6FA50F}",
> 0, 1, 0)
>
> class MyPanel(wx.Panel):
>      def __init__(self, *args, **kwds):
>          # begin wxGlade: MyPanel.__init__
>          kwds["style"] = wx.TAB_TRAVERSAL
>          wx.Panel.__init__(self, *args, **kwds)
>          self.frame = args[0]
>
>          MyMap = MakeActiveXClass(MapPointMod.MappointControl,
> eventObj=self)
>          self.window_1 = MyMap(self, -1)
>          self.window_1.OpenMap("C:\\TEMP\\GPS_ON.ptt")
> ...
> ...
>      def OnBeforeClick(self, Button, Shift, X, Y, Cancel):
>          print "tada"
>
> My event fires just fine, but I can't seem to figure out how to cancel
> the event so that mappoint doesn't do its stuff with it...I've tried
> setting Cancel based on the mappoint specs, but it doesn't seem to get
> sent back anywhere...
>
> Any ideas please?
>
> Thanx,
>
> OLIVER

This probably isn't the best place to post questions of this nature.
You should try the wxPython's user group or the pywin32 group.

http://wxpython.org/maillist.php
http://mail.python.org/mailman/listinfo/python-win32

Is the event you're trying to cancel caught by wxPython's event
handlers or win32?

Mike



From david at asdf.asdf  Sun Aug 26 23:24:45 2007
From: david at asdf.asdf (bambam)
Date: Mon, 27 Aug 2007 13:24:45 +1000
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csoronscqp7d2@corp.supernews.com>
	<1188090322.663217.102750@22g2000hsm.googlegroups.com>
	<13d4bucfm4m1lc4@corp.supernews.com>
	<13d4elsj1so0ed3@corp.supernews.com>
Message-ID: <13d4gvt9l6nud51@corp.supernews.com>

Thank you, I have been through the tutorial several times, I guess
I'm just not smart enough. Python is quite different from the
languages I am familiar with.

My code sample started like this:

>>for i in range(self.parent.GetPageCount()):

I was asked:

>Does page count change? i.e. is it necessary to retrieve it in every loop


Is self.parent.GetPageCount() 'retrieved every loop'?

Steve.

"Scott David Daniels" <daniels at dsl-only.net> wrote in message 
news:13d4elsj1so0ed3 at corp.supernews.com...
> bambam wrote:
>> That is, is it defined what Python does for
>>     for i in f()
>> I'm sure it must be, but I haven't seen it yet. If I have
>> a user defined function returning a range, is it defined
>> that the range function is called on every loop? If I
>> have a function returning a range taking a parameter,
>>     for i in f(v)
>> is it defined that the variable is evaluated for every loop?
>
> Nope.  Take the tutorial.
>
>     for i in f(v):
>         <suite>
> is the same as:
>     iterator = iter(f(v))
>     for i in iterator:
>         <suite>
>
> -Scott David Daniels
> Scott.Daniels at Acm.Org 




From gherzig at fmed.uba.ar  Tue Aug 28 15:20:23 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Tue, 28 Aug 2007 16:20:23 -0300
Subject: extending of adding method?
Message-ID: <46D47577.2050008@fmed.uba.ar>

Hi all. I have a question about design. The general question would be: 
Where is the line beteween extending a class and adding new methods to 
that class?

And the particular case im involved is:

I have a class (say USERCLASS) who implements a user interface. One of 
his methods is called `login'. Later on i got the order of implementing 
a `single login', which off course means a single user cant login if a 
session is already started for that user. Extending comes to my mind at 
first (it works good, actually). But now im thinikng if there some 
problem in adding a method to the USERCLASS class named single_login(), 
who will take care of applying the rules of single sign on.

Which one you guys will pick up? USERCLASS().single_login() or 
SINGLELOGINUSERCLASS().login()


Thanks for your oppinions!
Gerardo


From waveright at gmail.com  Sat Aug  4 15:06:01 2007
From: waveright at gmail.com (Todd Wade)
Date: Sat, 04 Aug 2007 19:06:01 -0000
Subject: I am giving up perl because of assholes on clpm -- switching to
	Python
In-Reply-To: <46a7b9e7$0$31113$426a74cc@news.free.fr>
References: <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d@giganews.com>
	<46a7b9e7$0$31113$426a74cc@news.free.fr>
Message-ID: <1186254361.836938.264260@x35g2000prf.googlegroups.com>

On Jul 22, 2:20 am, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> Martha_Jo... at tx.net a ?crit :
>
> > Python is a better language, with php support,
>
> Python has php support ? My, I'm a professional web developper using
> both, and I didn't knew this.
>

As an aside, perl DOES support PHP:

http://search.cpan.org/~gschloss/PHP-Interpreter/

trwww



From jstroud at mbi.ucla.edu  Fri Aug 10 01:37:43 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 10 Aug 2007 05:37:43 GMT
Subject: beginner whitespace question
In-Reply-To: <1186716319.025828.93780@g12g2000prg.googlegroups.com>
References: <1186703261.136506.208660@x35g2000prf.googlegroups.com>
	<1186703525.591462.122140@m37g2000prh.googlegroups.com>
	<1186704161.334597.218750@z24g2000prh.googlegroups.com>
	<1186707164.095766.243480@q3g2000prf.googlegroups.com>
	<1186708404.901323.204730@g12g2000prg.googlegroups.com>
	<f9gf03$3al$1@daisy.noc.ucla.edu>
	<1186716319.025828.93780@g12g2000prg.googlegroups.com>
Message-ID: <HQSui.32716$2v1.16515@newssvr14.news.prodigy.net>

Dan Bishop wrote:
>> Tabs are for tables, hence the name. "Use spaces for space and use tabs
>> for tables" can be a little mnemonic to help you remember the rules. We
>> can make a little song together if you can think of some things that
>> rhyme with "don't" and "use" and "tabs".
> 
> "won't"
> 
> "blues", "booze", "bruise", "choose", "cruise", "fuse", "hues",
> "Jews", "lose", "muse", "news", "snooze", "views", etc.
> 
> "abs", "cabs", "crabs", "dabs", "grabs", "labs", "scabs", "slabs",
> "stabs", etc.
> 


When you want to screw your whitespace--don't!
Take this little pledge and I know you won't:

When I was in school I would take of booze
While my typing teacher said I'm free to use
Space or formfeed or even tabs
And I punched so hard with my pinkie that scabs
Covered my Jake and Elwood tatoos.
(You didn't see that one coming did yous?)


From faulkner891 at gmail.com  Tue Aug  7 17:52:11 2007
From: faulkner891 at gmail.com (faulkner)
Date: Tue, 07 Aug 2007 21:52:11 -0000
Subject: Heterogeneous lists
In-Reply-To: <RPadnXFHmYYUIiXbnZ2dnUVZ_uKpnZ2d@comcast.com>
References: <RPadnXFHmYYUIiXbnZ2dnUVZ_uKpnZ2d@comcast.com>
Message-ID: <1186523531.911570.140470@o61g2000hsh.googlegroups.com>

On Aug 7, 2:53 pm, Gordon Airporte <JHoo... at fbi.gov> wrote:
> This is one of those nice, permissive Python features but I was
> wondering how often people actually use lists holding several different
> types of objects.
> It looks like whenever I need to group different objects I create a
> class, if only so I can use more meaningful names than '[2]' for the items.
> How often do these show up in your code?
> Is this simply the upshot of the underlying arrays holding only object
> references of some sort?

how else would you implement an n-ary tree? eg, AST, CST, minimax, GP.



From greg.kujawa at gmail.com  Thu Aug  2 15:08:57 2007
From: greg.kujawa at gmail.com (gregarican)
Date: Thu, 02 Aug 2007 19:08:57 -0000
Subject: i am new to python-Please somebody help
In-Reply-To: <mailman.1520.1186073909.22759.python-list@python.org>
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com>
	<1186063842.827016.95030@q3g2000prf.googlegroups.com>
	<mailman.1520.1186073909.22759.python-list@python.org>
Message-ID: <1186081737.357371.232040@i13g2000prf.googlegroups.com>

On Aug 2, 12:58 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "gregarican" <greg.kuj... at gmail.com> wrote in message
>
> news:1186063842.827016.95030 at q3g2000prf.googlegroups.com...
> | friendly than Python's. Your points are well-taken in how to properly
> | post and how to do your own homework. Message correct. Delivery
> | lacking...
>
> Sorry, I saw nothing rude in Steven's straightforward and indeed polite
> suggestion.  Your post, however, ....
>
> tjr

Maybe it's just me but the word "grovelling" just doesn't ring of
newbie friendliness. To each their own I guess. Kind of like the
Smalltalk list where a few respondents are really dry. Someone will
post asking something like "Can I use Smalltalk to do X so that it
talks to Y?" One guy (without pointing to a link or offering a
snippet) just posts "Yes." I guess literally they have contributed. Or
someone calls your house and asks, "Is so-and-so there?" You just say
"Yes" and hang up on them :-)




From sjmachin at lexicon.net  Sat Aug  4 21:13:32 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 04 Aug 2007 18:13:32 -0700
Subject: Formatting Results so that They Can be Nicely Imported into a
	Spreadsheet.
In-Reply-To: <1186270555.514649.311280@d30g2000prg.googlegroups.com>
References: <1186270555.514649.311280@d30g2000prg.googlegroups.com>
Message-ID: <1186276412.198678.316230@z24g2000prh.googlegroups.com>

On Aug 5, 9:35 am, SMERSH009 <SMERSH0... at gmail.com> wrote:
> Hi All.
> Let's say I have some badly formatted text called doc:
>
> doc=
> """
> friendid
> Female
>
>                             23 years old
>
>                             Los Gatos
>
>                             United States
> friendid
> Male
>
>                             24 years old
>
>                             San Francisco, California
>
>                             United States
> """
>
> How would I get these results to be displayed in a format similar to:
> friendid;Female;23 years old;Los Gatos;United States
> friendid;Male; 24 years old;San Francisco, California;United States
>
> The latter is a lot easier to organize and can be quickly imported
> into Excel's column format.
>

You write a script to read your input file and write it out either in
CSV format, using the Python csv module, or just use
';'.join(output_row) if you are sure that there are no ';' characters
in the data.

Is this a homework question?



From bbxx789_05ss at yahoo.com  Sun Aug 12 02:32:37 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 11 Aug 2007 23:32:37 -0700
Subject: wxPython - drawing without paint event
In-Reply-To: <1186883988.585048.16590@m37g2000prh.googlegroups.com>
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
	<1186738813.373909.96230@x35g2000prf.googlegroups.com>
	<1186796567.331348.42450@q3g2000prf.googlegroups.com>
	<5i5l0dF2lortaU1@mid.individual.net>
	<1186883988.585048.16590@m37g2000prh.googlegroups.com>
Message-ID: <1186900357.837235.253940@w3g2000hsg.googlegroups.com>

On Aug 11, 7:59 pm, glenn.chapp... at gmail.com wrote:
> On Aug 11, 3:31 am, Bjoern Schliessmann <usenet-
>
>
>
> mail-0306.20.chr0n... at spamgourmet.com> wrote:
> >  glenn.chapp... at gmail.com wrote:
> > > On a related topic, it seems like it would be nice to do *all*
> > > drawing in
> > > response topaintevents. When I get aneventfrom the timer, I
> > > would just tell wx that part of the window needs redrawing, and
> > > depend on it to give me apainteven when nothing of higher
> > > priority needs to be done.
>
> > One nice strategy from an example in "wxPython in Action" is the
> > following:
>
> > * the frame has Draw methods that draw into a BufferedDC, which is
> > chained to a bitmap member
>
> > * inside thepaintmethod, the bitmap member is drawn to screen
>
> Okay, but how do I tell wx that it needs to send me a paint event?

Try this:

--------------
import wx

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, "My Window")

        panel = wx.Panel(self, -1)
        self.text = wx.StaticText(panel, -1, "hello", pos=(40, 40) )

        self.timer = wx.Timer(self)
        self.Bind(wx.EVT_TIMER, self.on_timer_event)
        self.timer.Start(milliseconds=1000, oneShot=False)

        self.Bind(wx.EVT_PAINT, self.on_paint)

    def on_timer_event(self, event):
        self.GetEventHandler().ProcessEvent(wx.PaintEvent())

    def on_paint(self, event):
        print "execution entered on_paint"

app = wx.App(redirect=False)

win = MyFrame()
win.Show()

app.MainLoop()
------------

I'm not sure why the call should be
self.GetEventHandler().ProcessEvent() instead of just
self.ProcessEvent().



From steve at holdenweb.com  Thu Aug  2 09:32:43 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Aug 2007 09:32:43 -0400
Subject: Use variable in regular expression
In-Reply-To: <bfc796de0708020609j21b5eb41gcb00a98eb86ea44a@mail.gmail.com>
References: <1186051401.122847.114690@d55g2000hsg.googlegroups.com>	
	<46B1D144.8060108@holdenweb.com>
	<bfc796de0708020609j21b5eb41gcb00a98eb86ea44a@mail.gmail.com>
Message-ID: <46B1DCFB.4020809@holdenweb.com>

[when replying to a mailing list or newsgroup response please make sure 
you include the list as a recipient, so the whole conversation is available]

Andr? Martins wrote:
> 
>>  I know I can use a variable in regular expressions. I want to use a
>>  regex to find something based on the beginning of the string. I am
>>  using yesterday's date to find all of my data from yesterday.
>>  Yesterday's date is 20070731, and assigned to the variable
>>  "yesterday_date". I want to loop thru a directory and find all of the
>>  yesterday's data ONLY IF the feature class has the date at the
>>  BEGINNING of the filename.
> 
> If i understood, you have directores with files named 20070731, 20070722 ...
> 
> So, what about:
> 
> import os
> yesterday_date = '20070731'
> list = os.listdir (dir)
> for x in [x for x in list if x.startswith( yesterday_date ) ]:
>     print x
> 
> 
> Is  not a option?
> 
If it works it's an option! Regular expressions should usually be a last 
resort, and the solution above seems perfectly acceptable to me.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
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----------- Thank You for Reading -------------


From andmart at gmail.com  Thu Aug  2 09:10:29 2007
From: andmart at gmail.com (=?ISO-8859-1?Q?Andr=E9_Martins?=)
Date: Thu, 2 Aug 2007 10:10:29 -0300
Subject: Use variable in regular expression
In-Reply-To: <46B1D144.8060108@holdenweb.com>
References: <1186051401.122847.114690@d55g2000hsg.googlegroups.com>
	<46B1D144.8060108@holdenweb.com>
Message-ID: <bfc796de0708020610v5fda034fi72cf93d894f53f2f@mail.gmail.com>

> I know I can use a variable in regular expressions. I want to use a
> regex to find something based on the beginning of the string. I am
> using yesterday's date to find all of my data from yesterday.
> Yesterday's date is 20070731, and assigned to the variable
> "yesterday_date". I want to loop thru a directory and find all of the
> yesterday's data ONLY IF the feature class has the date at the
> BEGINNING of the filename.

If i understood, you have directores with files named 20070731, 20070722 ...

So, what about:

import os
yesterday_date = '20070731'
list = os.listdir (dir)
for x in [x for x in list if x.startswith( yesterday_date ) ]:
    print x


Is  not a option?

[]'s
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From google at mrabarnett.plus.com  Thu Aug 30 15:13:23 2007
From: google at mrabarnett.plus.com (MRAB)
Date: Thu, 30 Aug 2007 12:13:23 -0700
Subject: list index()
In-Reply-To: <1188492060.983148.90000@r34g2000hsd.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au>
	<1188492060.983148.90000@r34g2000hsd.googlegroups.com>
Message-ID: <1188501203.081166.235680@q5g2000prf.googlegroups.com>

On Aug 30, 5:41 pm, zzbba... at aol.com wrote:
> On Aug 30, 12:09 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>
> > zzbba... at aol.com writes:
> > > What's with the index() function of lists throwing an exception on not
> > > found?
>
> > It's letting you know that the item isn't in the list. There's no
> > sensible return value from an "index" function in that condition.
>
> for str:
>
> find(   sub[, start[, end]])
>     Return the lowest index in the string where substring sub is
> found, such that sub is contained in the range [start, end]. Optional
> arguments start and end are interpreted as in slice notation. Return
> -1 if sub is not found.
>
> -1 is used in other languages as well.

In 0-based languages it's often -1 whereas in 1-based languages it's
often 0.



From http  Sat Aug 18 04:07:57 2007
From: http (Paul Rubin)
Date: 18 Aug 2007 01:07:57 -0700
Subject: Encryption and hashing
References: <1187377630.017794.36510@50g2000hsm.googlegroups.com>
	<mailman.2122.1187379425.22759.python-list@python.org>
	<1187392383.237609.97250@19g2000hsx.googlegroups.com>
	<mailman.2142.1187423835.22759.python-list@python.org>
Message-ID: <7xr6m1l0yq.fsf@ruckus.brouhaha.com>

Laszlo Nagy <gandalf at designaproduct.biz> writes:
> OK sorry, I was wrong. Isn't blowfish a better version of twofish anyway?

No.  


From steve at holdenweb.com  Fri Aug  3 22:27:05 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 03 Aug 2007 22:27:05 -0400
Subject: downloading files
In-Reply-To: <1186176739.765447.262720@w3g2000hsg.googlegroups.com>
References: <1186166920.757662.269340@o61g2000hsh.googlegroups.com>	<mailman.1584.1186168229.22759.python-list@python.org>
	<1186176739.765447.262720@w3g2000hsg.googlegroups.com>
Message-ID: <46B3E3F9.6060202@holdenweb.com>

Ehsan wrote:
> On Aug 3, 10:10 pm, Steve Holden <st... at holdenweb.com> wrote:
[...]
>> I'm guessing there are binary files and you are running on Windows,
>> which is inserting a carriage return before ebery newline. Try
>>
>>         localFile = open(fileName, 'wb')
>>
>> to avoid thus behavior.
[...]
> thanx Steve
> It works but could you explain more what's wrong with just 'w'?
> 

Hmm, I thought I had. 'b' stand for 'binary', and the system sends out 
exactly the bytes you right. Without the 'b' it assumes you are handling 
text, so Windows "CR/LF" line endings are converted to "LF" or reading, 
and "LF" is converted to "CR/LF" on writing.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From dimitri.pater at gmail.com  Thu Aug 23 05:49:59 2007
From: dimitri.pater at gmail.com (dimitri pater)
Date: Thu, 23 Aug 2007 11:49:59 +0200
Subject: Joining elements in a list to 1 element
Message-ID: <e75321bd0708230249k6e4670a2n9436902257c67f1@mail.gmail.com>

Dear all,
I am having trouble joining elements in a list into 1 element.
e.g. ['a','b','c'] into ['abc'] so that len(list) returns 1

I have tried the following:
myList = ['a','b','c']
print myList
>>>['a', 'b', 'c']
# get type
print type(myList)
>>><type 'list'>
# get length
print len(myList)
>>>3

myList2 = ''.join(myList)
print myList2
>>>abc
# get type
print type(myList2)
>>><type 'str'>
# get length
print len(myList2)
>>>3

As you can see, the type 'list' turns into 'str' after .join. Doing
something like list(''.join(myList)) returns the type 'list' but still has 3
elements.

thanks,
Dimitri

-- 
---
You can't have everything. Where would you put it? -- Steven Wright
---
please visit www.serpia.org
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From steve at holdenweb.com  Thu Aug 16 16:50:37 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Aug 2007 16:50:37 -0400
Subject: Hijack! Different book:
In-Reply-To: <13c8u9nd4fk7r0d@corp.supernews.com>
References: <mailman.1957.1187093157.22759.python-list@python.org>	<1187096231.194685.86030@m37g2000prh.googlegroups.com>	<20070814154913.D8C3C1E400A@bag.python.org>	<8a6b8e350708141020q495b22der4c362ee3df618d82@mail.gmail.com>	<mailman.1979.1187113641.22759.python-list@python.org>	<1187117012.088495.247890@q4g2000prc.googlegroups.com>	<1187191950.037749.8050@z24g2000prh.googlegroups.com>	<13c6fb3pntv6n13@corp.supernews.com>	<1187263267.314987.253590@a39g2000hsc.googlegroups.com>
	<13c8u9nd4fk7r0d@corp.supernews.com>
Message-ID: <fa2dan$j5j$1@sea.gmane.org>

Dennis Lee Bieber wrote:
> On Thu, 16 Aug 2007 04:21:07 -0700, Paul Boddie <paul at boddie.org.uk>
> declaimed the following in comp.lang.python:
> 
> 
>> Is this the book that came out before TurboGears even reached 1.0,
>> probably having diminished relevance now that there are 1.1 and 2.0
> 
> 	Not sure -- I'd ordered it in January, but Amazon didn't ship it
> until a week ago; don't know if it was this, or the other book in the
> shipment that held it up.

JANUARY!?????? So much for Amazon's customer service. Or is it only 
February where you live?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bronger at physik.rwth-aachen.de  Fri Aug 24 18:08:27 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sat, 25 Aug 2007 00:08:27 +0200
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<mailman.285.1187992595.32294.python-list@python.org>
Message-ID: <87tzqotwkk.fsf@wilson.homeunix.com>

Hall?chen!

Evan Klitzke writes:

> On 8/23/07, Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
>
>> Some LaTeX users in Aachen thought about a general-use markup
>> language this spring.  I wrote some code and a rough project
>> description, however, we could need some help.
>
> I have another question about your markup language. Are there any
> plans on adding provisions for layout and positioning? The
> difficulty of learning advanced layout has been one of my major
> frustrations with LaTeX (I'm referring to LaTeX's weird box
> system, I'm not sure exactly what the proper terminology for it
> is).

I don't know exactly what you mean but the answer is probably no.
For example, I want the author to state the title, keywords, etc of
his document, however, he should not state that he wants the title
printed centred and 4cm from the top of the page.

The latter is defined in the "theme" which will be given as a set of
ordinary LaTeX commands (for the LaTeX backend).

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From martinezfive at comcast.net  Sat Aug 18 22:47:35 2007
From: martinezfive at comcast.net (martinezfive at comcast.net)
Date: Sat, 18 Aug 2007 19:47:35 -0700
Subject: Segmentation Fault in 2.5 Installation
Message-ID: <1187491655.381240.196880@19g2000hsx.googlegroups.com>

Hi.
    I was attempting to instal the 2.5 release on my Ubuntu box.
Config went fine.  Make went fine.  Make instal, not so much.  I get:
        Compiling /usr/local/lib/python2.5/test/test_compare.py ...
        Compiling /usr/local/lib/python2.5/test/test_compile.py ...
        Compiling /usr/local/lib/python2.5/test/test_compiler.py ...
        Compiling /usr/local/lib/python2.5/test/test_complex.py ...
        Compiling /usr/local/lib/python2.5/test/
test_complex_args.py ...
        make: *** [libinstall] Segmentation fault
Any ideas on how to proceed?  Do you need any additional information
from me?

Thanks in advance.



From Eric_Dexter at msn.com  Sun Aug  5 02:50:46 2007
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: Sat, 04 Aug 2007 23:50:46 -0700
Subject: the one python book
In-Reply-To: <mailman.1611.1186233912.22759.python-list@python.org>
References: <mailman.1611.1186233912.22759.python-list@python.org>
Message-ID: <1186296646.055252.93310@z24g2000prh.googlegroups.com>

On Aug 4, 8:23 am, "dhr" <dima.hris... at gmail.com> wrote:
> newbie question:
>
> Is there a 'K&R" type of Python book? The book that you'd better have on
> your shelf if you are going into Python?

I thought Python Essential Reference was helpfull but It doesn't work
that well without another book to go with it..  I used the internet
alot o get examples with the book as a reference..



From luca.bertini at email.it  Thu Aug 30 10:14:32 2007
From: luca.bertini at email.it (luca bertini)
Date: Thu, 30 Aug 2007 16:14:32 +0200
Subject: strings (dollar.cents) into floats
Message-ID: <12B58F2B-2F4F-4F6A-9F75-7444427B8CA8@email.it>

Hi,

i have strings which look like money values (ie 34.45)
is there a way to convert them into float variables?
everytime i try I get this error: "numb = float(my_line) ValueError:  
empty string for float()"
"
here's the code

************

import sys
import re

for line in sys.stdin.readlines():
	my_line = line.rstrip()
	numb = float(my_line)
	print numb


From half.italian at gmail.com  Thu Aug  9 14:31:31 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: Thu, 09 Aug 2007 18:31:31 -0000
Subject: tempfile behavior
In-Reply-To: <1186683707.869668.316360@g4g2000hsf.googlegroups.com>
References: <1186683707.869668.316360@g4g2000hsf.googlegroups.com>
Message-ID: <1186684291.629191.185070@z24g2000prh.googlegroups.com>

On Aug 9, 11:21 am, billiejoex <gnew... at gmail.com> wrote:
> Hi all,
> I would like to use tempfile module to generate files having unique
> names excepting that I don't want them to be removed after closing.
> Does it is possible?

Looks like tempfile.mkstemp() will do what you want.

'''Unlike TemporaryFile(), the user of mkstemp() is responsible for
deleting the temporary file when done with it.'''

~Sean



From sjmachin at lexicon.net  Fri Aug 31 17:51:50 2007
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 31 Aug 2007 14:51:50 -0700
Subject: strings (dollar.cents) into floats
In-Reply-To: <13dgop2nlsvkoab@corp.supernews.com>
References: <mailman.140.1188483282.28954.python-list@python.org>
	<877incd20i.fsf@benfinney.id.au>
	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
	<1188575044.874256.42960@50g2000hsm.googlegroups.com>
	<mailman.214.1188576439.28954.python-list@python.org>
	<13dgop2nlsvkoab@corp.supernews.com>
Message-ID: <1188597110.341812.305060@i38g2000prf.googlegroups.com>

On Sep 1, 4:51 am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Fri, 31 Aug 2007 12:06:49 -0400, Steve Holden <st... at holdenweb.com>
> declaimed the following in comp.lang.python:
>
> > That last sentence is patent nonsense, and completely untrue. Many
> > satisfactory financial applications have been written using only
> > floating-point arithmetic. Indeed I believe the accountant's Swiss army
> > knife, the Excel spreadsheet, uses floating-point numbers exclusively.
>
>         Excel supports M$'s "Currency" data type

That sentence is also completely untrue. Excel supports only IEEE 754
64-bit floating point, and that is how bean-counts, temperature
readings, dates, and money amounts are stored in an XLS file. What is
confusing you may be the "helpful" way that COM etc examine the
"number format" that's been used on a cell.

Example: actual value is 1.234567..... (a float). The "number format"
used in Excel causes it to be displayed as $1.23. However what COM etc
produce when they extract the data is a "currency" or "money" instance
containing $1.2345 which is NEITHER what you see NOR what you've
actually got. That's a somewhat Procrustean attitude to "support".

> -- which I believe is a
> 64-bit INTEGER scaled for four decimal places.
>
>         It's "general" format is a variant type accepting integer, float,
> text, date/time (but can't differentiate currency form float on input)

Excel has no concept of a variant type. "General" is a "number
format", not a data type. Excel has storage types corresponding to
Python's float, unicode (16 bit), bool and None, as well as an error
type.




From zzbbaadd at aol.com  Fri Aug 31 10:01:01 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 31 Aug 2007 07:01:01 -0700
Subject: list index()
In-Reply-To: <mailman.194.1188560160.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<87bqcod2gq.fsf@benfinney.id.au>
	<1188517370.998114.119940@q4g2000prc.googlegroups.com>
	<mailman.179.1188521931.28954.python-list@python.org>
	<1188530220.815429.281380@i38g2000prf.googlegroups.com>
	<mailman.183.1188533232.28954.python-list@python.org>
	<1188534823.558722.212480@l22g2000prc.googlegroups.com>
	<mailman.194.1188560160.28954.python-list@python.org>
Message-ID: <1188568861.178828.138910@o80g2000hse.googlegroups.com>


>
> Fair enough, but that's a tutorial. It would be foolish to demand that a
> tutorial be a complete reference for everything that can be done with a list.

I wasn't demanding anything of the page. I was pointing out how I made
the assumption there was no way to find out if a list has a value
other than by using index(). I am not used to having keywords in a
language operate on a data structure, in addition to its methods.

> The page lists all methods of list objects, but there are more things one can
> do with lists that don't look like method calls. For example, it doesn't say
> that you can compare lists. It doesn't say that you can read and write
> elements in the lists. Would you automatically assume that those things aren't
> possible? I hope not. (Of course, those operations are handled by the magical
> methods __eq__, __setitem__, __getitem__ etc, but I think one can forgive the
> tutorial for not mentioning those in the interest of not confusing beginners.)
>
> By your logic, no web page would be allowed to say anything about lists unless
> it says *everything* about lists, and that wouldn't be very useful.

As I just stated, I wasn't making a criticism of the page. But since
you are defending it, let's talk about Python documentation from the
perspective of an experienced programmer who is a new/casual user of
both Python and Java. If I am in the process of writing a little Java
program, java.sun.com provides documentation on its data structures
that show up right at the top of a google search for "Java ArrayList",
"Java Hashtable", etc.

If I am writing a little Python program and want to see what I can do
with a list, I google "python list" I get the tutorial page that has
been mentioned. Then the next query result is a page that is titled
the "Python Language Reference". But in this reference page for
"python str,unicode,list,tuple,buffer,xrange", I see operators that
work on lists and other data structures that I an mot concerned with,
but there is no list of "list methods". But I do see navigational
arrows that I hopefully assume will take me to a page where I can find
all the list methods - but that is not the case. I go from "3.6
Sequence Types -- str, unicode, list, tuple, buffer, xrange" to "3.6.1
String Methods" to "3.6.2 String Formatting Operations" to "3.6.3
XRange Type" to "3.6.4 Mutable Sequence Types". And then I'm done with
3.6 of the Python Language Reference and I never saw a list of list
methods or a page devoted to lists. So I bounce out to the table of
contents assuming that there must be an entry for "list" that will
show all the list methods and operators and give me a summary ala Java
ArrayList. But all I find are entries for UserList and AddressList. :(



From bscrivener42 at gmail.com  Sat Aug  4 10:29:49 2007
From: bscrivener42 at gmail.com (BartlebyScrivener)
Date: Sat, 04 Aug 2007 14:29:49 -0000
Subject: the one python book
In-Reply-To: <mailman.1611.1186233912.22759.python-list@python.org>
References: <mailman.1611.1186233912.22759.python-list@python.org>
Message-ID: <1186237789.344413.116540@e9g2000prf.googlegroups.com>

On Aug 4, 8:23 am, "dhr" <dima.hris... at gmail.com> wrote:
> newbie question:
>
> Is there a 'K&R" type of Python book? The book that you'd better have on
> your shelf if you are going into Python?

I second the comment about the Official Python Tutorial, however you
did say, "on the shelf" in which case I would recommend:

Python Essential Reference, David Beazley, 3rd edition Feb 2006
great, esp. if you already know some other programming language.

http://tinyurl.com/38f5mh

rd



From alibaaba at gmail.com  Thu Aug  2 21:27:20 2007
From: alibaaba at gmail.com (alibaaba at gmail.com)
Date: Thu, 02 Aug 2007 18:27:20 -0700
Subject: PYTHON PROGRAMMING HELP PLSSS !!URGENT
Message-ID: <1186104440.508568.138960@i38g2000prf.googlegroups.com>

HI All,
i am a 4th year business student and i took web design online course
for fun however i did not see that last 2 chapters were python
programming.This has no relevance to my major nor does it have any
contribution to my degree. My fun turned out to be my nightmare since
i literally can not grasp the main idea like other computer science
students. To sum up , i need help with the following code, please do
not send me emails telling me that outside class help is not provided
or etc, this is not my major related course and this might also affect
my graduation date.
This is the working sample program ;
http://cmpt165.cs.sfu.ca/~ggbaker/examples/chequebook.html
If interested please email me, i am ready to make it up for your time
that you spend to get me out of this mess.
thanks
This is what i needed to do ;
-Create the initial XHTML page with the forms.
-Write a program that uses the chequelib module to load the data.
Print out all of the cheque numbers.  This doesn't have to be a web
script (yet).
-Use the sample data file for testing.
-Modify the program so that it outputs XHTML code and can be used as a
web script.  Add checking for the password and an error if it's
incorrect.
-Add printing of the amount and description to this script.
-Modify the script so it outputs the total of the transactions.
-Write a program that reads the new transaction information from the
form and outputs it on the XHTML page.
-Modify the program so it always appends the new data to the end of
the list (even if the cheque is already in the system).
-Modify the program so it checks to if the cheque number is already
there.  If it is, give an error message.
-Check the XHTML produced by all of the pages to make sure it's valid.



From richie at entrian.com  Fri Aug 31 05:27:34 2007
From: richie at entrian.com (Richie Hindle)
Date: Fri, 31 Aug 2007 10:27:34 +0100
Subject: list index()
In-Reply-To: <021801c7eba2$ad429640$03000080@hendrik>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com><46d674c2$0$417$426a34cc@news.free.fr><1188496588.750629.208100@g4g2000hsf.googlegroups.com>
	<1188497498.3468.60.camel@dot.uniqsys.com>
	<021801c7eba2$ad429640$03000080@hendrik>
Message-ID: <1cnfd31du01el95u70o8mjn9cb5r5aluiu@4ax.com>


[Carsten]
> .................. If we start labeling
> people, this thread will earn you a label that rhymes with "roll".

[Hendrik]
> weird this - maybe a native English speaker can comment - 
> when I pronounce what fishermen do - it rhymes with roll,
> but when I am talking about the thing that lives under bridges
> and munches goats, the "O" sound is shorter, and more 
> towards the back of my mouth.

But - the word for someone who posts to the internet with the intention of
stirring up trouble derives from the word for what fishermen do, not from
the word for something that lives under a bridge.  It derives from "trolling
for suckers" or "trolling for newbies".

-- 
Richie Hindle
richie at entrian.com


From newsgroups at debain.org  Sat Aug 18 18:27:24 2007
From: newsgroups at debain.org (Samuel)
Date: Sat, 18 Aug 2007 22:27:24 +0000 (UTC)
Subject: python video editing libs
References: <46c64393$1@news.orcon.net.nz>
Message-ID: <fa7roc$bg$1@tamarack.fernuni-hagen.de>

On Sat, 18 Aug 2007 12:55:47 +1200, DavidM wrote:

> Does anything like this exist?

GStreamer/GNonLin might possibly support what you are looking for, though 
I have not tested this.

http://docs.programmers.ch/index.php/Using_Gnonlin_with_GStreamer_and_Python

-Samuel


From kyosohma at gmail.com  Thu Aug  9 09:41:59 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 09 Aug 2007 06:41:59 -0700
Subject: tests
In-Reply-To: <mailman.1792.1186665714.22759.python-list@python.org>
References: <mailman.1792.1186665714.22759.python-list@python.org>
Message-ID: <1186666919.456036.120270@d30g2000prg.googlegroups.com>

On Aug 9, 8:21 am, nikolay marinov <n.mari... at sistechnology.com>
wrote:
> Hi, everyone.Does anybody have an idea how can i test two xls files for
> equality with Python

You should be able to read chunks of each file in binary mode and do a
compare to check for equality. Some kind of loop should do the trick.

Mike



From gherzig at fmed.uba.ar  Tue Aug 28 15:31:13 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Tue, 28 Aug 2007 16:31:13 -0300
Subject: Is it reasonably easy easy to something like this with python?
In-Reply-To: <1188326947.527698.245770@r23g2000prd.googlegroups.com>
References: <1188326947.527698.245770@r23g2000prd.googlegroups.com>
Message-ID: <46D47801.1000405@fmed.uba.ar>

walterbyrd wrote:

>This is made with a php5 framework called qcodo.
>
>http://examples.qcodo.com/examples/dynamic/inline_editing.php
>
>With qcodo it's easy to make grids that are sortable and inline
>editable. Qcodo grids work from the database - not an xml table or
>array. Qcodo handles complex data relations, and fairly large
>datadabes.
>
>I like python better than php, but I don't know of any python tools to
>create these sorts of grids.
>
>  
>
The one who make that table sorteable is AJAX. Not php. The php part is 
kind of trivial (so it would be `trivial' in python too). It just reads 
some data and format it in an html table.

Cheers.
Gerardo


From siona at chiark.greenend.org.uk  Wed Aug 29 08:59:00 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 29 Aug 2007 13:59:00 +0100 (BST)
Subject: Code design problem
References: <1188389375.238847.298320@w3g2000hsg.googlegroups.com>
Message-ID: <aYD*LTvTr@news.chiark.greenend.org.uk>

Marco Nawijn  <nawijn at gmail.com> wrote:
>I have a hard time figuring out an elegant and efficient design for
>the following problem.

What you want is known as the factory pattern.

> [ ... ] I would
>like the following (pseudo)-code to work:
>
>app = Application('patran')                  # Run on local machine
>app.start(args)
>
>app = Application('patran', host='myhost')   # Run on remote machine
>app.start(args)
>
>The Application, local implementation and remote implementation all
>have the same interface, so a possibility might be something like the
>following:
>
>class Interface(object):
>     .....
>     def start(self): pass
>     def stop(self): pass

You don't need an abstract interface like this in Python. Duck-
typing will take care of it for you. On the other hand, if you
do have common code between the local and global implementations,
it makes sense to share it in a base class. You might then want
to consider defining the methods which must be overridden as

def start(self): raise NotImplementedError
etc.

Given:

>class LocalImplementation(Interface):
>       .....
>
>class GlobalImplementation(CorbaGlobalImplementation, Interface):
>       .....

with suitable start and stop methods defined, all you need is
an Application factory function:

def Application(program, host=None):
    if host is None:
        return LocalImplementation(program)
    return GlobalImplementation(program, host)

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
   "Frankly I have no feelings towards penguins one way or the other"
        -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From timr at probo.com  Sat Aug  4 21:51:04 2007
From: timr at probo.com (Tim Roberts)
Date: Sun, 05 Aug 2007 01:51:04 GMT
Subject: libpq.dll for pgdb
References: <1186174655.398009.117540@57g2000hsv.googlegroups.com>
Message-ID: <21bab35c355lticu4m3uei067bqfckuhsp@4ax.com>

ekzept <bayesianlogic at acm.org> wrote:
>
>the module PGDB which gives Python access to PostgreSql currently
>wants for a copy of a properly located or proper libpq.dll library, on
>Windows.
>
>anyone know what the current story on this is?

The story?  libpq.dll is the Postgres API interface library on Windows.
pgdb is a relatively thin Python wrapping of this generic API.  Pgdb is
ordinarily distributed as part of Postgres, so when you build it, you are
also building libpq.dll.

There are better choices than pgdb.  You might go searching for psycopg.
You'll still need libpq.  Here's one place to get it:

http://www.tksql.org/dll/
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From ocollioud at gmail.com  Fri Aug 24 07:58:12 2007
From: ocollioud at gmail.com (olive)
Date: Fri, 24 Aug 2007 11:58:12 -0000
Subject: Co-developers wanted: document markup language
In-Reply-To: <mailman.242.1187955295.32294.python-list@python.org>
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com>
	<87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com>
	<87tzqp77my.fsf@wilson.homeunix.com>
	<7xy7g1if24.fsf@ruckus.brouhaha.com>
	<87mywh717i.fsf@wilson.homeunix.com>
	<1187947900.676122.144490@e9g2000prf.googlegroups.com>
	<87absh6wn6.fsf@wilson.homeunix.com>
	<1187953231.106631.174870@q4g2000prc.googlegroups.com>
	<mailman.242.1187955295.32294.python-list@python.org>
Message-ID: <1187956692.378840.251540@m37g2000prh.googlegroups.com>

On 24 ao?t, 13:34, Wildemar Wildenburger <wilde... at freakmail.de>
wrote:
> olive wrote:
> > What you need is good structured text editor which hides as much as
> > possible the underlying XML (or other) format.
>
> What you do there is pose extra requirements on the user ("Use a text
> editor with some far-out functions"). That will prevent your (well,
> Torsten's ;)) standard from spreading easily. Plain text (read: less
> intrusive) markup is a way better approach there, IMHO, because it can
> be done in any old editor.

We are talking about two different things: data entry and document
publishing.

for me ODF is good for document publishing only.

I agree that Plain Text Markup is usually better than XML even with a
good XML editor and a simple schema.

But few people are used to Plain Text Markup (excepted in some
scientific area maybe) and it is error prone.

This is why some user-friendly PTM or XML based editors are needed.

Good user-friendly editor will help in spreading standard.
OpenOffice is a good example for ODF but this has never happened to
XML or any other markup language.

Olive



From t.seput? at ?verizon.com  Tue Aug 21 14:42:47 2007
From: t.seput? at ?verizon.com (Tony)
Date: Tue, 21 Aug 2007 18:42:47 GMT
Subject: Latest models of Gibson guitars
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<1187548916.909340.37420@k79g2000hse.googlegroups.com>
	<1187579396.285862.186860@e9g2000prf.googlegroups.com>
	<9K6dnY8HnIUNHlTbnZ2dnUVZ_gGdnZ2d@comcast.com>
	<1187657694.106990.266830@z24g2000prh.googlegroups.com>
	<1187700758.572516.186610@57g2000hsv.googlegroups.com>
Message-ID: <HmGyi.1296$Uf7.1005@trnddc06>

I don't who is posting here stupid shit about guitars
who ever is do self fever hang your self with one of strings


"kaldrenon" <kaldrenon at gmail.com> wrote in message 
news:1187700758.572516.186610 at 57g2000hsv.googlegroups.com...
> On Aug 20, 8:54 pm, Twisted <twisted... at gmail.com> wrote:
>> If the message then
>> says something absurd, like "this is a newsgroup about Python" when
>> I'm reading it in cljp, well, what do you expect? :P
>
> I think most would expect you to go, "WTF?" but then, like a rational
> person, click the helpful little "More options" link that GG provides
> (I'm assuming you use GG to read as well as to post, forgive me if I'm
> wrong) and double-check before harassing someone because you jumped to
> conclusions.
>
>> though nothing in the headers would indicate this.
>
> Newsgroups: comp.lang.java.programmer,
> microsoft.public.dotnet.framework.aspnet, comp.lang.python,
> rec.photo.digital, alt.home.repair
> From: mobile... at gmail.com
> Date: Sun, 19 Aug 2007 17:34:58 -0000
> Local: Sun, Aug 19 2007 1:34 pm
> Subject: Latest models of Gibson guitars
>
> That's the header GG shows. Preeeetty clear.
>
> Just a tip for future reference - all's fair if you weren't aware of
> this feature of GG's interface.
> 




From XX.XmcX at XX.XmclaveauX.com  Mon Aug 27 10:48:34 2007
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Mon, 27 Aug 2007 16:48:34 +0200
Subject: How to free memory ( ie garbage collect) at run time with Python
	2.5.1(windows)
References: <1188224306.863247.127890@50g2000hsm.googlegroups.com>
Message-ID: <mn.dbf07d78329985f0.46195@XX.XmclaveauX.com>

Hi!

For windows, I had a soft for this (reduce_memory.exe). Sorry, it's not 
write with Python.

If you want, I will give a URL for download it.

-- 
@-salutations

Michel Claveau




From arkanes at gmail.com  Thu Aug 16 12:51:09 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 16 Aug 2007 11:51:09 -0500
Subject: Who told str() to round my int()'s!!!
In-Reply-To: <zd_wi.14608$eY.8264@newssvr13.news.prodigy.net>
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
	<9qmvi.47364$s5.1537219@phobos.telenet-ops.be>
	<mailman.1857.1186861157.22759.python-list@python.org>
	<3ZudnUuJ68lcxl7bnZ2dnUVZ_t_inZ2d@comcast.com>
	<slrnfc7sot.1aa.hat@se-162.se.wtb.tue.nl>
	<zd_wi.14608$eY.8264@newssvr13.news.prodigy.net>
Message-ID: <4866bea60708160951w1bc1a6b7u18b874b672d6c93a@mail.gmail.com>

On 8/16/07, John Nagle <nagle at animats.com> wrote:
> A.T.Hofkamp wrote:
> > On 2007-08-15, Larry Bates <larry.bates at websafe.com> wrote:
> >
> >>or the mildy
> >>amusing "how do I write bytes not characters to a file" questions at least once
> >>a week on this forum.
>
>     Actually, that's a reasonable question, and one that Python didn't do
> quite right.
>

No it isn't. You can't write anything except bytes to a file (or to a
socket, or, in fact, to any form of IO) and anyone who thinks they can
do anything different is confused.

>     Remember, in the beginning, Python had only ASCII strings, which
> were equivalent to arrays of bytes.  Then came Unicode strings.  Then
> came the restriction of ASCII chars to 0..127.  Except that you can
> still store binary bytes in ASCII strings, subject to some limitations.
>

I agree that the name of the string object is a misnomer, because it's
actually a sequence of bytes.

There's no limitation to anything you can stick it - a python 2.x
string object can contain any arbitrary sequence of bytes.

Where you may believe that you see a limitation is in the default
implicit unicode conversion, which assumes non-extended ascii and
errors on values over 127. This is a pragmatic decision which assumes
that being able to print unicode objects without hoop-jumping is
preferable to preventing the errors and confusion caused by implicit
conversion. I am not 100% certain the correct decision was made -
there's a lot of confusion on this list that would be easier to
explain if any attempt to convert unicode to bytes or vice versa
required an explicit encoding.

>     The next logical step is a complete separation of binary data handling
> from text string handling, probably using some type in "numarray" for
> arrays of bytes.
>

There are still lots of cases where it's convenient to work with
binary data as if it were ascii text, and overlap between "real"
binary data work and textual data work.

>                                         John Nagle
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From bj_666 at gmx.net  Fri Aug 10 01:49:04 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 Aug 2007 05:49:04 GMT
Subject: High performance binary data
References: <1186705614.728812.284460@j4g2000prf.googlegroups.com>
Message-ID: <5i2cigF3kqc46U2@mid.uni-berlin.de>

On Fri, 10 Aug 2007 00:26:54 +0000, Steve wrote:

> I want to ready binary data from a udp socket effeciently as possible
> in python.  I know of the struct package but do people have any tips
> when dealing with binary data in python?  Is there a library or api
> that is faster when dealing with binary data. I am looking for a any
> one with experience or ideas on the subject.  Pointers any one?

I don't know if it is faster, but maybe constructing objects with
the `ctypes` module let you write more readable code as you can treat and
access C ``struct``\s like objects.

For the "fast" part of the question you might consider actually measuring
your program, as the task may be I/O bound i.e. Python may be faster than
the data comes in regardless of which module, `struct` or `ctypes`, you
use to tear apart and access the data.

Ciao,
	Marc 'BlackJack' Rintsch


From aclarke11 at yahoo.co.uk  Wed Aug  8 16:05:50 2007
From: aclarke11 at yahoo.co.uk (Tony)
Date: Wed, 08 Aug 2007 13:05:50 -0700
Subject: How can I programmatically find the name of a method from within
	that method?
In-Reply-To: <f9br51$e9a$01$1@news.t-online.com>
References: <1186548312.672360.259100@q3g2000prf.googlegroups.com>
	<mailman.1727.1186549847.22759.python-list@python.org>
	<1186557384.845276.151630@i13g2000prf.googlegroups.com>
	<f9br51$e9a$01$1@news.t-online.com>
Message-ID: <1186603550.882122.223340@d55g2000hsg.googlegroups.com>

On Aug 8, 8:25 am, Peter Otten <__pete... at web.de> wrote:
> kj7ny wrote:
> > What is @checkPrivs (see example copied below from other post)?  In
> > fact... how does the thing work at all?
> > @checkPrivs
> > def add(a,b):
> >     return a+b
>
> @... is called a decorator and is just a fancy way of writing
>
> def add(a, b):
>     return a+b
> add = checkPrivs(add)
>
> Peter

Is this cheating?

class a:


	def square(self, x):

		print 'executing:', dir(self)[-1]
		print x*x
	def cube(self, x):
		print 'executing:',	dir(self)[-2]
		print x*x*x

b=a()



b.square(3)
b.cube(3)
Output:

PyMate r6780 running Python 2.3.5 (python)
>>> function self naming2.py

executing: square
9
executing: cube
27



From claird at lairds.us  Wed Aug  1 11:33:02 2007
From: claird at lairds.us (Cameron Laird)
Date: Wed, 1 Aug 2007 15:33:02 +0000
Subject: Python end of file marker similar to perl's __END__
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
	<1185976656.753817.27980@x40g2000prg.googlegroups.com>
	<slrnfb17m5.224.horpner@FIAD06.norwich.edu>
Message-ID: <eml6o4-tvd.ln1@lairds.us>

In article <slrnfb17m5.224.horpner at FIAD06.norwich.edu>,
Neil Cerutti  <horpner at yahoo.com> wrote:
>On 2007-08-01, beginner <zyzhu2000 at gmail.com> wrote:
>> Thanks everyone for responding. It doesn't look like python has
>> it. I would definitely miss it. As Steve said, the nice thing
>> about __END__ is that things below __END__ do not have to have
>> legit syntax. That let me focus on the lines of code I am
>> debugging and do not have to worry about some bad syntax down
>> the line. This feature is especially handy if I am, saying,
>> replacing modoules or changing data structures.
>
>A C-like trick might be helpful while refactoring:
>
><working code>
>if False:
>   <non-working code>
>
>You have to indent all the non-working code by one level, but
>with a good editor that's a snap.
>
>Python will still parse the following lines (it must be valid
>Python syntax), but the resulting parse tree won't be executed.
			.
			.
			.
I want to re-emphasize the "triple-quote it" tip mentioned
earlier in this thread.  I think the original questioner
will find this quite satisfying, if I understand his situ-
ation at all.

*I* certainly have source code with embedded "junk" 
commented out as multi-line strings.


From jstroud at mbi.ucla.edu  Fri Aug 24 16:08:40 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 24 Aug 2007 13:08:40 -0700
Subject: How to replace a method in an instance.
In-Reply-To: <1187984450.138147.62780@e9g2000prf.googlegroups.com>
References: <mailman.258.1187971369.32294.python-list@python.org>
	<1187971953.261328.219000@q3g2000prf.googlegroups.com>
	<46cf2ba2$0$30562$426a74cc@news.free.fr>
	<1187984450.138147.62780@e9g2000prf.googlegroups.com>
Message-ID: <fands8$vr7$1@daisy.noc.ucla.edu>

kyosohma at gmail.com wrote:
> I'm not going to help with these class / instance / whatever any more
> and leave it to all you professionals.

Wrong again. Stick your neck out, look like an ass, and then 
learn--alot. That's what I do.

Your misinformation will be corrected, even if you are chastised in the 
process.

James



-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From bj_666 at gmx.net  Wed Aug 29 05:29:09 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 29 Aug 2007 09:29:09 GMT
Subject: Error handling in file generation (Pythonic way: with /
	decorators?)
References: <1188377932.955314.104570@r29g2000hsg.googlegroups.com>
Message-ID: <5jksj5F31aaU1@mid.uni-berlin.de>

On Wed, 29 Aug 2007 08:58:52 +0000, xavim wrote:

> I am having some problems with how to do proper error handling.
> One of the requirements is that the destination file should not be
> created if there is any error in the processing.
> 
> I have come out with the following code::
> 
>     dictfile = file(dictpath, 'w')
>     try:
>         try:
>             dictgen(dictfile, *sources)
>         finally:
>             dictfile.close()
>     except error, e:
>         os.remove(dictpath)
>         sys.exit(str(e))
>     except:
>         os.remove(dictpath)
> 
> but it appears to me as somewhat ugly.  Is there any more Pythonic
> way to abstract this kind of error handling?  Maybe 'with' or
> decorators could be useful here?

With ``with`` you can get rid of the inner ``try``/``finally``:

    dictfile = open(dictpath, 'w')
    try:
        with dictfile:
            dictgen(dictfile, sources)
    except error, e:
        os.remove(dictpath)
        sys.exit(str(e))
    except:
        os.remove(dictpath)
        raise

Ciao,
	Marc 'BlackJack' Rintsch


From twisted0n3 at gmail.com  Sun Aug 19 23:09:56 2007
From: twisted0n3 at gmail.com (Twisted)
Date: Mon, 20 Aug 2007 03:09:56 -0000
Subject: Latest models of Gibson guitars
In-Reply-To: <1187548916.909340.37420@k79g2000hse.googlegroups.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<1187548916.909340.37420@k79g2000hse.googlegroups.com>
Message-ID: <1187579396.285862.186860@e9g2000prf.googlegroups.com>

On Aug 19, 2:41 pm, vedrandeko... at v-programs.com wrote:
> This is  a newsgroup of programming language Python, stop with this!

Python?! Python is as off-topic here as guitars, unlike, say, Java...



From tylerca at jeld-wen.com  Thu Aug  2 11:27:42 2007
From: tylerca at jeld-wen.com (Azazello)
Date: Thu, 02 Aug 2007 15:27:42 -0000
Subject: sending very large packets over the network
In-Reply-To: <mailman.1478.1186026731.22759.python-list@python.org>
References: <9c8d48280708011555l5d1d439fu3c5fbcc61dc41f07@mail.gmail.com>
	<mailman.1478.1186026731.22759.python-list@python.org>
Message-ID: <1186068462.255568.84180@i38g2000prf.googlegroups.com>

On Aug 1, 8:50 pm, Gary Herron <gher... at islandtraining.com> wrote:
> Walker Lindley wrote:
> > OK, I'm back with another networking question. I'm trying to seend
> > large amounts of information over TCP (the length of data being given
> > to send() is on the order of 16000 characters in length).
> > Unfortunately on the receiving end, the packets appear to be
> > truncated. So I wrote some code that continuously tries to send bigger
> > and bigger packets until it fails and noticed that it never fails at
> > the same length. I'm not even sure these two things are related, but
> > is there some undocumented (or documented and I missed it) maximum
> > size for data you can pass to send()?
>
> For ethernet connections the size is often about 1500.  But the size
> depends on the underlying protocol, and even if you know the underlying
> protocol along the full route, you can't rely on packets that are
> received being the same as those that are sent.
>
> TCP/IP is a *stream* connection.  What you are guaranteed is this:  All
> the bytes that are sent from one end will be received eventually on the
> other end, in the proper order.  (Or failing that, you will receive an
> error notification.)  No guarantee is made about the packet sizes on
> either end, and you can't even rely on the packets being the same in
> number or length on the two ends.
>
> Your send code can try sending a packet of any size, but it must be
> prepared to examine the number of bytes actually sent, and retry with
> the remainder in a loop until all bytes are sent.    Similarly your
> receiving code must loop around the receive accepting whatever sized
> packets makes it through the connection.
>
> In many TCP/IP connections, it seems that the packets received are
> one-for-one with the packets sent, but relying on this *IS AN ERROR*
> that will bite you.  It fails to across the internet (sometimes) and
> when (at least some) wireless cards are involved.
>
> You may be better off using a package that knows all this and handles it
> properly.  Modules asyncore and asynchat are one possibility.
>
> Gary Herron
>
>
>
>
>
> > the sample code is as follows
> > #server
> > import socket
>
> > s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> > s.bind(("", 2000))
> > s.listen(0)
> > sock, addrinfo = s.accept()
> > for i in range(2 ** 16):
> >  length = int(sock.recv(16))
> >  print "excpecting data of length:", length
> >  data = sock.recv(length)
> >  print "received data of length:", len(data)
> >  print
> > s.close()
> > sock.close()
>
> > #client
> > import socket
> > import time
>
> > s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> > s.bind(("", 2001))
> > s.connect(("localhost", 2000))
> > for i in range(2 ** 16):
> >  packet = "h" * i
> >  s.send("%16d" % len(packet))
> >  print "attempting to send data of length:", len(packet)
> >  tmp = s.send(packet)
> >  print "actually sent data of length:", tmp
> >  print
> >  time.sleep(.001)
> > s.close()
>
> > i just put them in different files and ran them from the command line.
> > Any help or suggestions would be greatly appreciated. Thanks.
>
> > -Walker
>
> > --
> > This e-mail is licensed under the Creative Commons
> > Attribution-NoDerivs 2.5 License. To view a copy of this license,
> > visithttp://creativecommons.org/licenses/by-nd/2.5/or send a letter
> > to Creative Commons, 543 Howard Street, 5th Floor, San Francisco,
> > California, 94105, USA.- Hide quoted text -
>
> - Show quoted text -

I'm not an expert on networking so take my advice with a grain of
salt!

My guess is that you're encountering race-like conditions between the
send and recv. commmands because you're running your communication
command 2^16 times, hoping that send and recv. are synchronous on
every step.  This is especially true when you're running other
commands in your data sending loops! Prints take quite a lot of time.
Also, the send command in C (i'm not sure if this is true in python)
does not guarantee that all of your data gets out.

I'm assuming that you're somewhat new to networking so I would
recommend shying away from running an Asynchronous polling server.
Although it is probably a better way to do this.

My suggestions:

Write a while loop in the server with some end of stream checking,
timeouts, et cetera. This will give you a bit of flexibility and
feedback when things go to pot.  Use the sendall() command  in your
client because it throws an exception if data isn't properly sent. and
will eliminate a unsightly for loop.

Client

socket.sendall(data)

Something akin to this old piece of test code

datastream = ''

## A timeout exception is thrown if the receiver is waiting on the
line for .25 seconds
socket.settimeout(.25)

    while 1:
	try:
            buf = socket.recv(1024) ## If data on line put in buffer
        except socket.timeout:      ## Data buffer timeout,  breaks
while loop
            break
	if buf == '': ## If an empty buffer, jump to top of loop (beginning
of file check)
	    continue

        datastream = datastream + str(buf)

        if not len(buf) == 1024:  ## If the buffer is not full break
signaling end of file.
            break

Hope this helps!  And like i said i'm pretty new to this so be
careful!  Foundations of Network Programming by John Goerzen is a
great book if you want some good information on the topic.

Tyler



From pyscottishguy at hotmail.com  Tue Aug 21 18:11:57 2007
From: pyscottishguy at hotmail.com (pyscottishguy at hotmail.com)
Date: Tue, 21 Aug 2007 22:11:57 -0000
Subject: 'REPL' style IDE
In-Reply-To: <1187641335.794138.27150@q3g2000prf.googlegroups.com>
References: <1187632249.748945.158910@i13g2000prf.googlegroups.com>
	<mailman.20.1187639538.32294.python-list@python.org>
	<1187641335.794138.27150@q3g2000prf.googlegroups.com>
Message-ID: <1187734317.881009.263790@19g2000hsx.googlegroups.com>

How about embedding ipython in your script with:

from IPython.Shell import IPShellEmbed

ipshell = IPShellEmbed()

** your set up code **

ipshell() # this call anywhere in your program will start IPython

see: http://ipython.scipy.org/doc/manual/node9.html#sec:embed

Here are some ipython tips: http://ipython.scipy.org/doc/manual/node4.html

Another option is to set up Wing so that it attaches to a process that
is started externally (http://wingware.com/doc/debug/importing-the-
debugger)

So... in one window you can run your code that sets up everything and
then displays the ipython CLI - and in the other window you have
WingIDE where you can set your breakpoints and use the GUI.

Is this what you're looking for?




From sbassi at clubdelarazon.org  Wed Aug 15 09:39:16 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Wed, 15 Aug 2007 10:39:16 -0300
Subject: Combinatorial of elements in Python?
In-Reply-To: <46C2ED11.70904@freakmail.de>
References: <9e2f512b0708142203m782b0e10s817fb4d061ba0e46@mail.gmail.com>
	<46C2ED11.70904@freakmail.de>
Message-ID: <9e2f512b0708150639u4208352bi8550c988a0dec0d3@mail.gmail.com>

On 8/15/07, Wildemar Wildenburger <wildemar at freakmail.de> wrote:
> Oh but it is:
> >>> ADictionary={"one":["A","B","C","D"],"two":["H","I"]}
> >>> result = set()
> >>> for one in ADictionary["one"]:
> ...     for two in ADictionary["two"]:
> ...         result.add(one + two)

That was easy :)
What about extending it for N elements inside the dictionary? Sounds
like a work for a recursive function.

-- 
Sebasti?n Bassi (???????)
Diplomado en Ciencia y Tecnolog?a.
GPG Fingerprint: 9470 0980 620D ABFC BE63 A4A4 A3DE C97D 8422 D43D

From horpner at yahoo.com  Thu Aug  9 09:51:52 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 09 Aug 2007 13:51:52 GMT
Subject: Help with Dictionaries and Classes requested please.
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
	<46baf183$0$433$426a74cc@news.free.fr>
	<46baf384$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bb00d4$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
	<slrnfbm34n.n0.horpner@FIAD06.norwich.edu>
	<46bb19bb$0$399$426a74cc@news.free.fr>
Message-ID: <slrnfbm77i.uc.horpner@FIAD06.norwich.edu>

On 2007-08-09, Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
> Neil Cerutti a ?crit :
>> On 2007-08-09, special_dragonfly <Dominic at PLEASEASK.co.uk> wrote:
>>> Is there anyway for python to consider the values within a
>>> string when entering the data into a dictionary. I know that
>>> isn't very clear so here's an example:
>>>
>>> class MyClass(object):
>>>     def __init__(self,name="",age=""):
>>>         self.name=name
>>>         self.age=age
>>>
>>> data="Gary,50"
>>> d={0:[MyClass(data)]}
>>> data="Adam,25"
>>> d[0].append(MyClass(data))
>>>
>>> The data is coming from a text file working on a line by line
>>> basis. I've just tried and I'm just getting the full string in
>>> the first field. That seems logical, now I don't want it to
>>> though!
>> 
>> That's what happens if you use 0 for the key every time. ;)
>
> Hmmm... Neil, I may be wrong but I think you didn't get the
> point here. As I understand it,  Dominic's problem is that it
> gets strings like "Gary,50" and would like to call MyClass
> initializer this way : MyClass("Gary", "50")

My guess was he doesn't need a class at all, but needed to decide
what he's mapping from->to. It seems far-fetched to me that he
*really* wants a mapping between an index and MyClass objects
containing name and age.

So I tried to cut out the middle-man. Hopefully we can get some
closure on this.

-- 
Neil Cerutti


From valpis at gmail.com  Mon Aug 27 16:40:50 2007
From: valpis at gmail.com (Johan)
Date: Mon, 27 Aug 2007 20:40:50 -0000
Subject: some problems with mod_python
In-Reply-To: <mailman.41.1188246576.28954.python-list@python.org>
References: <1188245587.129794.258250@z24g2000prh.googlegroups.com>
	<mailman.41.1188246576.28954.python-list@python.org>
Message-ID: <1188247250.674070.303910@z24g2000prh.googlegroups.com>

On Aug 27, 10:29 pm, "Greg Donald" <gdon... at gmail.com> wrote:

> This is the syntax I have working locally:
>
> # mod_python
> <Directory /opt/local/apache2/htdocs/modpython>
>   AddHandler python-program .py
>   PythonHandler test
>   PythonDebug On
> </Directory>
>
> In particular my AddHandler directive is different from yours.
>
If I did understand the docs about the difference between python-
program and mod_python is that the later is the new way, while using
python-program still works.
It does not matter which I use, same result.

/johan



From bdesth.quelquechose at free.quelquepart.fr  Mon Aug  6 02:19:47 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 06 Aug 2007 08:19:47 +0200
Subject: Adding a list of descriptors to a class
In-Reply-To: <5hrlp9F3ldifeU6@mid.uni-berlin.de>
References: <1186503932.110835.293640@x40g2000prg.googlegroups.com>
	<5hrlp9F3ldifeU6@mid.uni-berlin.de>
Message-ID: <46b8d14c$0$28378$426a74cc@news.free.fr>

Marc 'BlackJack' Rintsch a ?crit :
> On Tue, 07 Aug 2007 09:25:32 -0700, Bob B. wrote:
> 
> 
>>Ok, that "exec" is an ugly hack.  There's gotta be someway to plop
>>this straight into the class's __dict__ without doing that, but when I
>>try adding self.__class__.__dict__[attr] = MyDesc(attr) in MyClass's
>>__init__ method, I get the error: "TypeError: 'dictproxy' object does
>>not support item assignment"
> 
> 
> Does ``setattr(self.__class__, attr, MyDesc(attr))`` work?

In the __init__() ?

Yes indeed, it works. But it means that:
1/ the attributes are not set on the class before it has been 
instanciated at least once
2/ each time you instanciate the class, the attributes are rebound to 
new MyDesc instances

class MyDesc(object):
     def __init__(self, name=None, initVal=None):
         self.name = name
         self.value = initVal
         print "new %s" % self.__class__.__name__

     def __get__(self, obj, objtype):
         # Do some stuff
         #self.value = "blah"
         if obj is None:
             return self
         return self.value

class Marc(object):
     attributes = ('toto', 'tata')
     def __init__(self):
         cls = self.__class__
         for attr in cls.attributes:
             setattr(cls, attr, MyDesc(attr, attr))

 >>> Marc.toto
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
AttributeError: type object 'Marc' has no attribute 'toto'
 >>> m1 = Marc()
new MyDesc
new MyDesc
 >>> Marc.toto
<__main__.MyDesc object at 0x4033846c>
 >>> t = _
 >>> m2 = Marc()
new MyDesc
new MyDesc
 >>> Marc.toto is t
False
 >>>

So while it "works" (kinda), I would not recommand this solution. Even 
if you do test for the existence of the attribute before rebinding it, 
you'll have to go thru the whole dance each time you instanciate the class.

My 2 cents...


From wildemar at freakmail.de  Mon Aug 20 11:13:30 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Mon, 20 Aug 2007 17:13:30 +0200
Subject: Where we need to use Python ?
In-Reply-To: <5A5F2F2E-3B7D-4B5E-94A0-19F540C111B9@jedimindworks.com>
References: <1187596936.136499.200280@l22g2000prc.googlegroups.com>
	<5A5F2F2E-3B7D-4B5E-94A0-19F540C111B9@jedimindworks.com>
Message-ID: <46C9AF9A.9020809@freakmail.de>

Michael Bentley wrote:
> On Aug 20, 2007, at 1:02 AM, gperumal at gmail.com wrote:
>
>   
>> And Is it a interpreted language or a programming language
>> It comes in which category
>>
>> I very keen to know this please tell
>>     
>
> [ open on suburban kitchen, Wife and Husband arguing ]
>
> Wife: New Shimmer is a floor wax!
>
> Husband: No, new Shimmer is a dessert topping!
>
> [snip 50s-style add]
>
> Spokesman: New Shimmer, for the greatest shine you ever tasted!
>   
Not the most to-the-point reply, but a very amusing one :).

/W


From mccredie at gmail.com  Wed Aug 22 16:46:14 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Wed, 22 Aug 2007 13:46:14 -0700
Subject: Learning Python using a book based on version 1.5
In-Reply-To: <1187814437.775758.159510@e9g2000prf.googlegroups.com>
References: <1187814437.775758.159510@e9g2000prf.googlegroups.com>
Message-ID: <9e95df10708221346l1099df0at87adc202700dec15@mail.gmail.com>

> A friend of mine dropped off a copy of Sams Teach Yourself Python in
> 24 Hours published in 2000.  I skimmed the first couple of chapters
> looking for the interpreter version and the book was based on version
> Python version 1.5.
>
> Is this book still relevant?   Should I toss it and look for something
> newer?

I'm sure it contains a fair amount of relevant information. The
problem is, it will also  contain irrelevant information and there is
no way to tell the difference. There definitely some better resources
out there. Here are some good free online ones:

http://docs.python.org/tut/
http://www.diveintopython.org/

-Matt


From jjl at pobox.com  Tue Aug  7 16:58:17 2007
From: jjl at pobox.com (John J. Lee)
Date: Tue, 07 Aug 2007 20:58:17 GMT
Subject: Misleading wikipedia article on Python 3?
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
Message-ID: <87lkcnoydy.fsf@pobox.com>

Carsten Haese <carsten at uniqsys.com> writes:

> On Sun, 2007-08-05 at 23:09 +0000, John J. Lee wrote:
>> I just wanted to know: is it easy to make my code so it
>> runs on 2.6 and 3.0, without funny stuff like a code translator?
>
> That depends on your definitions of "easy" and "funny stuff." I'm pretty
> sure you'll be able to run the same source code on Python 2.6 and Python
> 3.0 without either one breaking, as long as the code is written
> sufficiently carefully. You may have to give up some Python 3.0 features
> and/or write compatibility shims depending on what features you'll need.
> Whether that's acceptable depends on the features you need and how much
> "yak shaving" you find acceptable.
[...]

If I had wanted to start analysing requirements for some specific
project, I'd have gone and done that!-) I was actually interested in
the general case (all existing projects), as perhaps you'll see if you
read my original post (my followup question you quote above was
deliberately blunt for rhetorical let's-move-this-discussion-along
purposes -- <sigh> honestly, these literal-minded programmer types,
what CAN you do with them?-).

Do you *really* think that projects will fall 50-50 into the "yes" and
"no" camps, as you seem to imply -- after all, if you thought that one
case was more common, why wouldn't you mention which it was?

(where "yes" == "feasible to keep a single source code working in both
2.6 and 3.0", and of course it's taken as read that you can do the
generalisation to the -- I hope -- obvious continuum of cases
"between" "yes" and "no" without our needing to tiresomely spell it
out here)

I'll also add that previous comments from Guido have implied (to my
reading, admittedly without studying them like biblical texts) that
the great majority of projects will/should fall pretty squarely, in
his judgement, into the "no" camp -- i.e. NOT practical to keep 2.6
and 3.0 comptibility from a single source code without use of a
translation tool.  Does your "pretty sure"-ness stem from 1) a
knowledge of how 3.0 will look when it's done, 2) experience of
playing with the Py3k project as it is right now or 3) other?  What
sort of frequencies does your understanding of Py3k predict for the
"yes" and "no" cases?  By all means "use your skill and judgement" in
answering, rather than asking for clarification -- since that would
rather defeat the point of the question.


John


From sturlamolden at yahoo.no  Thu Aug  2 18:38:58 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: Thu, 02 Aug 2007 15:38:58 -0700
Subject: python 3.0, pywin32 and scipy
In-Reply-To: <1186088014.008755.318660@e9g2000prf.googlegroups.com>
References: <1186070475.659511.24130@q3g2000prf.googlegroups.com>
	<1186086609.231563.224090@x35g2000prf.googlegroups.com>
	<1186088014.008755.318660@e9g2000prf.googlegroups.com>
Message-ID: <1186094338.008747.95120@g12g2000prg.googlegroups.com>

On Aug 2, 10:53 pm, vml <victor.leb... at gmail.com> wrote:

> And I try to argue to give up vb 6 and use python.

Either you have a valid argument for switching to Python or you do
not. If you do not, there is not really any justification for the
extra work (including teaching your staff Python).


> C# is for our
> developpers the best solution to do this except the mathematic
> stuff...

In that case I suggest you should get rid of the staff. "Mathematical
stuff" is the realm of Fortran and scripting languages (Python,
Matlab, IDL, R). I would not trust anyone preferring C# for numerical
work to implement numerical algorithms.


> python is so easy to use and easy to read I believe it can be
> our best solution ...

Even if you are the only one knowing the language?




From __peter__ at web.de  Wed Aug 22 15:36:04 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 22 Aug 2007 21:36:04 +0200
Subject: Redo: How to create a function dynamically.
References: <mailman.132.1187809859.32294.python-list@python.org>
Message-ID: <fai375$c35$01$1@news.t-online.com>

Steven W. Orr wrote:

> I have this which works:
> 
> #! /usr/bin/python
> strfunc = """
> def foo( a ):
>      print 'a = ', a
> """
> exec strfunc
> globals()['foo'] = foo
> foo( 'Hello' )
> 
> and this which does not:
> 
> #! /usr/bin/python
> import new
> strfunc = """
> def foo( a ):
>      print 'a = ', a
> """
> co = compile ( strfunc, '', 'exec' )
> exec co
> nfunc = new.function( co, globals(), 'foo' )
> globals()['foo'] = nfunc
> foo( 'Hello' )
> 
> When I try to run this one I get:
> Traceback (most recent call last):
>    File "./m2.py", line 13, in ?
>      foo( 'Hello' )
> TypeError: ?() takes no arguments (1 given)
> 
> 
> I need the second case to work because I want to be able to end up with a
> function in a seperate module to do the work of function creation. The
> caller will pass in globals() so that the resulting function will end up
> in the directory?/dictionary? of that caller.

'co' is the code that creates the function foo(), not the code that is
executed when foo() is invoked.
Here's the brute force fix to make your script run without error:

#! /usr/bin/python
import new
strfunc = """
def foo( a ):
     print 'a = ', a
"""
co = compile ( strfunc, '', 'exec' )
ns = {}
exec co in ns
nfunc = new.function(ns["foo"].func_code, globals(), 'foo' )
globals()['foo'] = nfunc
foo( 'Hello' )
 
I still don't understand what you're trying to do...

I'm in a nitpicky mood, so
(1) No need to create a new thread for this post.
(2)
http://www.googlefight.com/index.php?lang=en_GB&word1=seperate&word2=separate

Peter




From hg at nospam.org  Wed Aug  1 21:32:48 2007
From: hg at nospam.org (hg)
Date: Wed, 01 Aug 2007 20:32:48 -0500
Subject: Emacs + python
References: <ak8x8v2udo.fsf@googlemail.com>
	<mailman.1476.1186017909.22759.python-list@python.org>
Message-ID: <4vasi.139194$wG2.61677@newsfe17.lga>

Edward O'Connor wrote:

>> Could anyone put me on the right track to developing Python with emacs
>> please : modes to consider, debugging etc hopefully all within emacs.
> 
> Personally, I prefer the python.el that ships with Emacs 22 to the
> python-mode.el from python.org. It seems more like other Emacs major
> modes.
> 
> 
> Ted
> 
> --
> Edward O'Connor
> hober0 at gmail.com
> 
> Ense petit placidam sub libertate quietem.

Are there any cscope & ECB equivalent for Python ?

Thanks 

hg



From arcega008 at yahoo.com  Wed Aug 22 00:26:28 2007
From: arcega008 at yahoo.com (jerickson arcega)
Date: Tue, 21 Aug 2007 21:26:28 -0700 (PDT)
Subject: threading.RLock not subclassible?
Message-ID: <321628.99314.qm@web57314.mail.re1.yahoo.com>

i need RLOCK to use in my computer plsss......send it in me.....
  and i can use the rlock when you give the rlock plssss teach me???
  plsssssssssssssssssssssssssssssssssssssssssssss

       
---------------------------------
Choose the right car based on your needs.  Check out Yahoo! Autos new Car Finder tool.
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From martin at v.loewis.de  Sun Aug 12 13:18:18 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 12 Aug 2007 19:18:18 +0200
Subject: Pausing and Unpausing Threads
In-Reply-To: <1186883176.319755.304970@d55g2000hsg.googlegroups.com>
References: <1186883176.319755.304970@d55g2000hsg.googlegroups.com>
Message-ID: <46bf40da$0$20126$9b622d9e@news.freenet.de>

> I'm worried that this loop may wast some CPU cycles, and wonder if
> there's a better way through thread synchronization using such things
> as Events or Conditions.

Typically, people are after the Queue module in such cases. Each
DirectedControl(l)er would have an instance of the Queue class,
and clients would put() actions into the queue. The controller would
get() an action from the queue, execute it, get the next action,
and so on. The get() will block when the queue is empty, so you
get synchronization for free. The queue would also accommodate the
case where multiple clients want to direct the same controller
simultaneously, by, well, queuing up the tasks.

HTH,
Martin


From jeffmess at gmail.com  Mon Aug 13 07:56:09 2007
From: jeffmess at gmail.com (jeffmess at gmail.com)
Date: Mon, 13 Aug 2007 11:56:09 -0000
Subject: Configuring apache to execute python scripts using mod_python
	handler
In-Reply-To: <1187003808.725705.56070@q3g2000prf.googlegroups.com>
References: <1187003808.725705.56070@q3g2000prf.googlegroups.com>
Message-ID: <1187006169.697203.112430@b79g2000hse.googlegroups.com>

Hi Joe

You'd probably have better luck posting this to the mod python mailing
list. Did you name your python script mptest.py and did you remember
to restart Apache when you edited the httpd.conf file? If so then I
don't see any reason why it shouldn't work although I've never tried
mod_python under a Windows environment.

Regards

Jeffrey van Aswegen

joe jacob wrote:
> I configured apache to execute python scripts using mod_python
> handler. I followed below mentioned steps to configure apache.
>
> 1. In http.conf I added
>
>   <Directory "D:/softwares/Apache2.2/htdocs">
>   AddHandler mod_python .py
>   PythonHandler mptest
>   PythonDebug On
>   </Directory>
>
> 2. Then I added the line "LoadModule python_module modules/
> mod_python.so" to http.conf.
>
> Then I tried execute the python script mentioned below from browser.
>
> from mod_python import apache
> def handler(req):
> req.content_type = 'text/plain'
> req.write("Hello World!")
> return apache.OK
>
> Then I am getting the following error
>
> Traceback (most recent call last):
>
>   File "D:\softwares\Python25\Lib\site-packages\mod_python
> \importer.py", line 1537, in HandlerDispatch
>     default=default_handler, arg=req, silent=hlist.silent)
>
>   File "D:\softwares\Python25\Lib\site-packages\mod_python
> \importer.py", line 1202, in _process_target
>     module = import_module(module_name, path=path)
>
>   File "D:\softwares\Python25\Lib\site-packages\mod_python
> \importer.py", line 304, in import_module
>     return __import__(module_name, {}, {}, ['*'])
>
> ImportError: No module named mptest
>
> I am using Apache 2.2.4, python 2.5 and mod_python-3.3.1.win32-py2.5-
> Apache2.2.
>
> I am able to execute python scripts by configuring apache to execute
> the cgi scripts. But I want to execute it using mod_python as it is
> faster compared to cgi mode. Someone please help me on this issue.



From kyosohma at gmail.com  Sat Aug  4 12:16:38 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Sat, 04 Aug 2007 09:16:38 -0700
Subject: something wrong with wxPython list ?
In-Reply-To: <3da89$46b4a169$d443bb3a$19602@news.speedlinq.nl>
References: <3da89$46b4a169$d443bb3a$19602@news.speedlinq.nl>
Message-ID: <1186244198.541188.286590@z24g2000prh.googlegroups.com>

On Aug 4, 11:01 am, Stef Mientki <S.Mientki-nos... at mailbox.kun.nl>
wrote:
> hello,
>
> All my posts to
>    wxPython-us... at lists.wxwidgets.org
> seems to be rejected since today ?
>
> Is there anything wrong with that list ?
>
> thanks,
> Stef Mientki

Somehow I doubt the people on this list will know. I checked the ASPN
archives, but they only show stuff from the 3rd. Not sure how often
they update anyway. Here's the link for future reference though:

http://aspn.activestate.com/ASPN/Mail/Browse/Plain/wxPython-users/3545288

I haven't received any of the wxPython digest since yesterday, so it
could be that it's down right now.

Mike



From attn.steven.kuo at gmail.com  Mon Aug 20 15:19:48 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Mon, 20 Aug 2007 19:19:48 -0000
Subject: Python equivalent of Perl's $/
In-Reply-To: <mailman.9.1187619031.26576.python-list@python.org>
References: <mailman.9.1187619031.26576.python-list@python.org>
Message-ID: <1187637588.073514.202930@x40g2000prg.googlegroups.com>

On Aug 19, 11:13 am, John K Masters <johnmast... at oxtedonline.net>
wrote:
> I am currently working my way through Jeffrey Friedl's book Mastering
> Regular Expressions. Great book apart from the fact it uses Perl for the
> examples.
>
> One particular expression that interests me is '$/ = ".\n"' which,
> rather than splitting a file into lines, splits on a period-newline
> boundary. Combined with Perl's 'while (<>)' construct this seems a great
> way to process the files I am interested in.
>
> Without wishing to start a flame war, is there a way to do this in Python?
>



import StringIO

text = """\
To mimic Perl's input record separator in
Python, you can use a generator.
And a substring test.
Perhaps something like the following
is what you wanted.
"""

mockfile = StringIO.StringIO(text)

def genrecords(mockfile, sep=".\n"):
    buffer = ""
    while True:
        while sep in buffer:
            idx = buffer.find(sep) + len(sep)
            yield buffer[:idx]
            buffer = buffer[idx:]
        rl = mockfile.readline()
        if rl == "":
            break
        else:
            buffer = '%s%s' % (buffer, rl)
    yield buffer
    raise StopIteration

for record in genrecords(mockfile):
    print "READ:", record


--
Hope this helps,
Steven



From hg at nospam.org  Fri Aug  3 09:51:36 2007
From: hg at nospam.org (hg)
Date: Fri, 03 Aug 2007 08:51:36 -0500
Subject: Emacs + python
References: <ak8x8v2udo.fsf@googlemail.com>
	<mailman.1476.1186017909.22759.python-list@python.org>
	<4vasi.139194$wG2.61677@newsfe17.lga>
	<mailman.1524.1186077010.22759.python-list@python.org>
Message-ID: <JpGsi.28744$GO6.24370@newsfe21.lga>

Greg Donald wrote:

> On 8/1/07, hg <hg at nospam.org> wrote:
>> Are there any cscope & ECB equivalent for Python ?
> 
> ECB is not language specific.  It works the same for browsing Python
> code as any other language.
> 
> 
> --
> Greg Donald
> http://destiney.com/

Thanks, I realized my mistake soon after I posted ... how about a cscope
equivalent ?

hg




From brunovianarezende at gmail.com  Fri Aug 17 10:21:52 2007
From: brunovianarezende at gmail.com (brunovianarezende at gmail.com)
Date: Fri, 17 Aug 2007 14:21:52 -0000
Subject: how to pass a custom object to re.search?
In-Reply-To: <1i2zz9z.jb9h6m13ontqgN%raims@dot.com>
References: <1187359347.755104.118660@r29g2000hsg.googlegroups.com>
	<1i2zz9z.jb9h6m13ontqgN%raims@dot.com>
Message-ID: <1187360512.063710.182450@r29g2000hsg.googlegroups.com>

> Try to implement __str__() for your object and provide a string
> representation for it.
>
> re.search(str(custom_object))
>

I've done that (and added __unicode__ too). I only didn't want to, I
want to do:

re.search(custom_object)

so, code that worked before as:

re.search(parentobj.custom_object)

don't have to be changed for:

re.search(str(parentobj.custom_object))

and I'm also curious to know if it is possible to do that... :-)



From qyloxe at gmail.com  Mon Aug 20 08:10:01 2007
From: qyloxe at gmail.com (qyloxe at gmail.com)
Date: Mon, 20 Aug 2007 05:10:01 -0700
Subject: LRU cache?
In-Reply-To: <7x8x8ixomj.fsf_-_@ruckus.brouhaha.com>
References: <7x8x8ixomj.fsf_-_@ruckus.brouhaha.com>
Message-ID: <1187611801.728000.248760@19g2000hsx.googlegroups.com>

#simple, but effective (sometimes)

class ICORCache:
   def __init__(self,agetfunc,amaxlen=100):
      self.GetValue=agetfunc
      self.MaxLen=amaxlen
      self.VDict={}
      self.KDict={}
      self.VPos=1
      self.AccessRatio=0
      self.HitRatio=0
   def __getitem__(self,key):
      self.AccessRatio=self.AccessRatio+1
      id=self.KDict.get(key,0)
      if id:
         self.HitRatio=self.HitRatio+1
         return self.VDict[id][1]
      else:
         v=self.VDict.get(self.VPos,0)
         if v:
            del self.KDict[v[0]]
         ret=apply(self.GetValue,(key,))
         self.VDict[self.VPos]=[key,ret]
         self.KDict[key]=self.VPos
         self.VPos=self.VPos+1
         if self.VPos>self.MaxLen:
            self.VPos=1
         return ret
   def dump(self):
      print 'Access ratio:',self.AccessRatio
      print 'Hit ratio:',self.HitRatio
      print 'Hit %:',100.0*self.HitRatio/self.AccessRatio
      print 'VDict len:',len(self.VDict.keys())
      print 'KDict len:',len(self.KDict.keys())

#tests
if __name__=='__main__':
   import random

   def GetCalculatedValue(key):
      x=`key`+'aaaa'
      y=key*0.5
      z=x+`y`
      return z

   # model of distribution
   amax=1000
   def GetIterative(key):
      return key
   def GetRandom(key):
      return random.randint(1,amax)
 
l1,l2,l3=random.randint(1,amax),random.randint(1,amax),random.randint(1,amax)
   def GetNDist(key):
      global l1,l2,l3
      l1,l2,l3=l2,l3,random.randint(1,amax)
      return int((l1+l2+l3)/3)

   def Main():
      for aname,afunc in [['Iterative',GetIterative],
['Random',GetRandom],['NDist',GetNDist]]:
         acache=ICORCache(GetCalculatedValue,100)
         for i in range(1000):
            k=afunc(i)
            x=acache[k]
            y=GetCalculatedValue(k)
            if x!=y:
               print 'Error!!!',k,x,y
         print 'Name:',aname
         acache.dump()
         print
      return

   Main()



From stargaming at gmail.com  Sat Aug  4 04:41:08 2007
From: stargaming at gmail.com (Stargaming)
Date: 04 Aug 2007 08:41:08 GMT
Subject: Auto run/Timer
References: <1186216025.768369.240570@j4g2000prf.googlegroups.com>
Message-ID: <46b43ba4$0$24905$9b622d9e@news.freenet.de>

On Sat, 04 Aug 2007 08:27:05 +0000, Rohan wrote:

> Hello,
> I would like my script to run once a week with out any external
> interference.
> More like a timer. Can it be done in python or should some other shell
> scripting be used.
> If anyone knows anything please let me know.

`cron` should be your way to go, IMO. `/etc/cron.weekly/` might be a 
starting point (copy your script into this directoy).

And, yes, it can be done using pure Python (but I wouldn't do it). See 
`threading.Timer <http://docs.python.org/lib/module-
threading.html#l2h-3422>`_.


From ladaan at iptel.org  Thu Aug 23 18:15:03 2007
From: ladaan at iptel.org (Ladislav Andel)
Date: Fri, 24 Aug 2007 00:15:03 +0200
Subject: comparing two lists
In-Reply-To: <fakvli$4da$01$1@news.t-online.com>
References: <mailman.180.1187886381.32294.python-list@python.org>	<fakgtj$c3d$00$1@news.t-online.com>	<mailman.190.1187892928.32294.python-list@python.org>
	<fakvli$4da$01$1@news.t-online.com>
Message-ID: <46CE06E7.9070704@iptel.org>

Peter Otten wrote:
> Ladislav Andel wrote:
>
>   
>> Peter Otten wrote:
>>     
>>> Ladislav Andel wrote:
>>>
>>>   
>>>       
>>>> what would be the most efficient way to do following?
>>>>
>>>> I have a list of dictionaries  taken from DB e.g.
>>>> dblist = [{'id:1, 'host':'google.com','ip_address':'1.2.3.4'},
>>>> {'id:3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
>>>> {'id:9, 'host':'msn.com','ip_address':'11.3.2.3'}]
>>>>
>>>> and list of object instances in memory(it's just for example)
>>>> which are looping within itself and testing particular hosts
>>>>
>>>> memlist = [<instance 1>,<instance 2>]
>>>> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
>>>> memlist[1].id  is 9 and  memlist[1].host is msn.com etc.
>>>>
>>>> Now I want to add a new instance to memlist since id=3(in dblist) is not
>>>> in memlist.
>>>> How would you iterate through it and insert a new instance?
>>>>
>>>> The result should be:
>>>> memlist = [<instance 1>,<instance 2>, <instance 3>]
>>>> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
>>>> memlist[1].id  is 3 and  memlist[1].host is yahoo.com etc.
>>>> memlist[2].id  is 9 and  memlist[2].host is msn.com etc.
>>>>     
>>>>         
>>> You should replace the memlist with a dictionary using (host, id) tuples
>>> as the keys. Here's an example that uses a set but requires you to modify
>>> the <instance N> class:
>>>
>>> dblist = [{'id':1, 'host':'google.com','ip_address':'1.2.3.4'},
>>> {'id':3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
>>> {'id':9, 'host':'msn.com','ip_address':'11.3.2.3'}]
>>>
>>> class Item(object):
>>>     def __init__(self, id, host, **discarded):
>>>         self._tuple = (id, host)
>>>     def __hash__(self):
>>>         return hash(self._tuple)
>>>     def __eq__(self, other):
>>>         return self._tuple == other._tuple
>>>     def __repr__(self):
>>>         return "Item(id=%r, host=%r)" % self._tuple
>>>
>>> items = set([Item(1, "google.com")])
>>> for d in dblist:
>>>     item = Item(**d)
>>>     if item not in items:
>>>         print "adding", item
>>>         items.add(item)
>>>     else:
>>>         print item, "already there"
>>>
>>>   
>>>       
>> Thank you for this nice solution. I wouldn't be able to write it this
>> way at all
>>     
>
> Then think twice before you use it. The dictionary approach should be
> straightforward.
>
>   
>> but what about removing from memlist if there is less items in dblist
>> than in items (instances)?
>> I will have to iterate over items(instances) and remove that one which
>> is not in dblist I guess.
>>     
>
> Yes, but again, if you use a dictionary instead of a list the lookup will be
> efficient.
>
> To follow up on my previous post: with sets there is a concise spelling:
>
> items &= set(Item(**d) for d in dblist)
>
> or even
>
> items.intersection_update(Item(**d) for d in dblist)
>
> if you don't mind object identity.
>
> Peter
>
>   

Thank you very much for this. I think everybody should ignore my 
previous email.. Shame on me.


From zyzhu2000 at gmail.com  Fri Aug 24 09:34:23 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Fri, 24 Aug 2007 13:34:23 -0000
Subject: List Comprehension Question: One to Many Mapping?
In-Reply-To: <7xlkc143ao.fsf@ruckus.brouhaha.com>
References: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
	<7x8x81l9z3.fsf@ruckus.brouhaha.com>
	<mailman.241.1187951774.32294.python-list@python.org>
	<7xlkc143ao.fsf@ruckus.brouhaha.com>
Message-ID: <1187962463.432814.139820@q4g2000prc.googlegroups.com>

On Aug 24, 5:47 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Boris Borcic <bbor... at gmail.com> writes:
> > >> For example, if I have x=[ [1,2], [3,4] ]
>
> > >> What I want is a new list of list that has four sub-lists:
>
> > >> [[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]]
> > > [[a, map(f,a)] for a in x]
>
> > no, that one will be [[[1,2], [f(1), f(2)]], [[3,4], [f(3), f(4)]]]
> > eg two sublists instead of four.
>
> Oh ugh, I misread the original request and thought the extra brackets
> were there.  I think the following works and is reasonably intuitive:
>
>     from itertools import chain
>     y = list(chain(*([a, map(f,a)] for a in x)))
>
> But the original request itself seems a bit weird.

Not so werid. :-) Just to put this into context, I have a list of list
of objects x=[[o1, o2, o3, o4], [o5,o6]]

I was trying to plot them with matplotlib. Each sub-list is a line. So
I would have to re-organize the list to be like the following:

v=[[o1.x, o2.x, o3.x, o4.x], [o1.y, o2.y, o3.y, o4.y], [o5.x, o6.x],
[o5.y, o6.y]]

So that I can pass it to plot:

plot(*tuple(v))

I like the chain and map solutions.



From orsenthil at users.sourceforge.net  Wed Aug 22 14:01:35 2007
From: orsenthil at users.sourceforge.net (O.R.Senthil Kumaran)
Date: Wed, 22 Aug 2007 23:31:35 +0530
Subject: Regarding Classes
In-Reply-To: <faf95j$7sh$1@sea.gmane.org>
References: <eb79828c0708201342sdb7e572h9dde11f914e12436@mail.gmail.com>
	<faf95j$7sh$1@sea.gmane.org>
Message-ID: <20070822180135.GA3555@gmail.com>

> > What is the main reason of "self" when it involves classes/functions
> > 
> "self" provides a semi-standard way of addressing the current instance 
> of a class.  It is used in an instance's method.  It is not typically
> used in functions.

Btw, you are free to use any other term as well instead of 'self'. But that just is not the practise. You can call it anything you want.

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From S.Mientki-nospam at mailbox.kun.nl  Sat Aug  4 12:01:54 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sat, 04 Aug 2007 18:01:54 +0200
Subject: something wrong with wxPython list ?
Message-ID: <3da89$46b4a169$d443bb3a$19602@news.speedlinq.nl>

hello,

All my posts to
   wxPython-users at lists.wxwidgets.org
seems to be rejected since today ?

Is there anything wrong with that list ?

thanks,
Stef Mientki


From greg.johnsen80 at gmail.com  Mon Aug 20 19:56:54 2007
From: greg.johnsen80 at gmail.com (greg)
Date: Mon, 20 Aug 2007 23:56:54 -0000
Subject: Syslog
Message-ID: <1187654214.498082.225300@r34g2000hsd.googlegroups.com>

Hi All,

Could anyone tell me how I could syslog to a specific log (e.g. /var/
log/daemon.log, /var/log/syslog.log...)?

Thanks very much in advance!

-Greg



From sjmachin at lexicon.net  Fri Aug 31 20:09:10 2007
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 31 Aug 2007 17:09:10 -0700
Subject: Python Unicode to String conversion
In-Reply-To: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
References: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
Message-ID: <1188605350.632650.262050@i38g2000prf.googlegroups.com>

On Sep 1, 8:55 am, thijs.br... at gmail.com wrote:
> Hi everyone,
>
> I'm having quite some troubles trying to convert Unicode to String
> (for use in psycopg, which apparently doesn't know how to cope with
> unicode strings).
>
> The error I keep having is something like this:
> ERREUR:  S?quence d'octets invalide pour le codage ?UTF8? : 0xe02063
>
> (sorry, locale is french, it means "byte sequence invalid for encoding
> <<utf8>>",

I'm a pig-ignorant Anglo; it's news to me that Python error messages
varied by locale; I thought they always came out in ASCII as G(od|
uido) intended :-) Does that message emanate from Python or psycopg?
In either case, it is saying that it is expecting a UTF8-encoded
string, but the string given to it is not a valid UTF8-encoded string.

> the value is probably an e with one of the french accents)

PROBABLY?? (1) Please try to understand that computers are quite
deterministic. (2) If you want help, stop guessing and use something
like
    print repr(the_value)
and tell us what it *actually* is. Also show us the *relevant* parts
of your code, so that we can see how your are trying to convert your
data, and how you are trying to pass it to psycopg. Also show us the
full traceback that you get.

>
> I've found lots of stuff about this googling the error, but I don't
> seem to be able to find a "works always"-function just to convert a
> unicode variable back to string...
>
> If someone could find me a solution, that'd really be a lifesaver.
> I've been losing hours and hours over this one :s
>

1. Find out what your input data actually is (e.g. unicode)
2. Find out what form psycopg requires (e.g. utf8-encoded str).
3. unicode to utf8 is quite simple:

>>> useq = u"S\xe9quence"
# that's "Sequence" with an acute accent on the first "e"
>>> useq8 = useq.encode('utf8')
>>> print repr(useq)
u'S\xe9quence'
>>> print repr(useq8)
'S\xc3\xa9quence'
>>> useq8.decode('utf8')
u'S\xe9quence'
# round trip works as expected

Here is what ASCII-Python says about malformed UTF8:

>>> "\xe0\x20\x63".decode('utf8')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\python25\lib\encodings\utf_8.py", line 16, in decode
    return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode bytes in position 0-2:
invalid data

Cheers,
John



From passport at windcrestsoftware.com  Mon Aug 20 11:17:05 2007
From: passport at windcrestsoftware.com (RickH)
Date: Mon, 20 Aug 2007 08:17:05 -0700
Subject: Latest models of Gibson guitars
In-Reply-To: <190820071924351381%rag@nospam.techline.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<QsCdnfC5hI4ENFXbnZ2dnUVZ8v2vnZ2d@bt.com>
	<190820071924351381%rag@nospam.techline.com>
Message-ID: <1187623025.845370.251530@x40g2000prg.googlegroups.com>

On Aug 19, 9:24 pm, Randall Ainsworth <r... at nospam.techline.com>
wrote:
> In article <QsCdnfC5hI4ENFXbnZ2dnUVZ8v2vn... at bt.com>, Hermit
>
> <her... at please.dont.bother.com> wrote:
> > How does the image quality compare with a DSLR?
>
> Depends on whether it's a Paul or a Strat.

A Strat is a Fender, but I'd rather win a Gibson es175.




From dfabrizio51 at gmail.com  Fri Aug 17 12:07:04 2007
From: dfabrizio51 at gmail.com (chewie54)
Date: Fri, 17 Aug 2007 16:07:04 -0000
Subject: best GUI library for vector drawing program
In-Reply-To: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
Message-ID: <1187366824.140017.285150@z24g2000prh.googlegroups.com>

On Aug 17, 9:27 am, chewie54 <dfabrizi... at gmail.com> wrote:
> Hello,
>
> What would be the best cross-platform GUI library to use for a vector
> based CAD program ( something like Visio on Windows )   WxWidgets,
> Tk,   PyQt,  Java Swing,  Java SWT,????   I need the capibility to
> draw and edit in a window that looks like a page of paper so WYSIWYG
> is very important,  and I need to save the drawings in vector based
> file formats like PS, EPS,  SVG, as well as image formats like jpg,
> png, and gif.  Also, the images need to be high resolution so that
> they can be pasted into various other programs in Windows OS,  and
> Linux OS,  and the Mac OS.
>
> Thanks in advance,
> Dan

Also,  I forgot to mention that it must have scripting capabilities so
and I would like to embed a Tcl or Python interpreter.



From byte8bits at gmail.com  Tue Aug 14 10:45:25 2007
From: byte8bits at gmail.com (brad)
Date: Tue, 14 Aug 2007 10:45:25 -0400
Subject: Script to copy database
In-Reply-To: <f9s9ks$hns$1@news2.u-psud.fr>
References: <GeOdnSj725utPFzbnZ2dnUVZ_vOlnZ2d@centurytel.net>
	<f9s9ks$hns$1@news2.u-psud.fr>
Message-ID: <f9sf92$cei$1@solaris.cc.vt.edu>

Laurent Pointal wrote:
> As you wrote about c: and f:, I imagine you are working under Windows.
> IMHO you dont need Python for that.

Unless you need error handling, reporting, etc.

Bat scripts only go so far.


From mail at timgolden.me.uk  Thu Aug 23 04:38:13 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 23 Aug 2007 09:38:13 +0100
Subject: Impersonate another user temporarily (Unix and Windows)
In-Reply-To: <1187809798.274511.230240@z24g2000prh.googlegroups.com>
References: <1187809798.274511.230240@z24g2000prh.googlegroups.com>
Message-ID: <46CD4775.70005@timgolden.me.uk>

billiejoex wrote:
> Hi there. I'm writing a modification for a FTP server library I'm
> maintaining.
> Depending on the system I'd want to temporarily impersonate the logged
> user to perform actions on filesystem.
> Something like:
> 
> try:
>     change_user('user', 'password')
>     os.rmdir('dir')
> except:
>     print "some error"
> finally:
>     change_user('old_user', 'password')
> 
> On Unix I took at look at os.seteuid() and os.setegid() functions and
> I noticed they could be useful for my purpose.
> On Windows I have no idea about how could I emulate a similar
> behaviour.
> Could someone please point me in the right direction?

(Warning: not tried, but at least gives you the things to Google for!)

You need the win32security module from the pywin32 extensions. [1]
In particular, you want to look at the LogonUser and
ImpersonateLoggedOnUser functions.

TJG

[1] http://pywin32.sf.net


From pyth0nc0d3r at gmail.com  Tue Aug 28 18:32:45 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Tue, 28 Aug 2007 17:32:45 -0500
Subject: New style classes
Message-ID: <eb79828c0708281532k1609bf15g814526d57fba79d0@mail.gmail.com>

Whats the point of object?  How do I actually use it.  I'm not understanding
correctly from the python site located:
http://www.python.org/download/releases/2.2.3/descrintro/

class C(object):

    def __init__(self):
        self.__x = 0

    def getx(self):
        return self.__x

    def setx(self, x):
        if x < 0: x = 0
        self.__x = x
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From syndrowm at gmail.com  Thu Aug 16 11:48:46 2007
From: syndrowm at gmail.com (syndrowm)
Date: Thu, 16 Aug 2007 09:48:46 -0600
Subject: A problem with Time
In-Reply-To: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
References: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <25f39da00708160848u156d104elb89b391ae9be2218@mail.gmail.com>

On 8/16/07, special_dragonfly <Dominic at pleaseask.co.uk> wrote:
>
> Hello,
>
> I need to return the date yesterday in the form DDMMYYYY. I looked through
> the modules: time, datetime and calendar but can't find anything that
> leaps
> out at me.
>
> The problem I'm having is that although I can use time.localtime and get a
> tuple of the year, month, day and so forth, I don't believe I can just
> minus
> 1 from the day, because I don't think it's cyclic, also, I can't see the
> date being linked in with the month.
>
> So is there any way of getting yesterdays date?
>
> Thank You
>
> Dominic
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list


The easiest way I have found, is to use epoch, subtract the length of time,
then convert back to whatever format.  24 hours  is 86400 seconds.

>>> import time
>>> time.localtime()
(2007, 8, 16, 9, 41, 28, 3, 228, 1)
>>> time.localtime(time.time() - 86400)
(2007, 8, 15, 9, 41, 21, 2, 227, 1)
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From aahz at pythoncraft.com  Fri Aug 10 09:36:23 2007
From: aahz at pythoncraft.com (Aahz)
Date: 10 Aug 2007 06:36:23 -0700
Subject: The Future of Python Threading
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<mailman.1826.1186743471.22759.python-list@python.org>
Message-ID: <f9hpkn$hbm$1@panix3.panix.com>

In article <mailman.1826.1186743471.22759.python-list at python.org>,
Steve Holden  <steve at holdenweb.com> wrote:
>
>I doubt that a thread on c.l.py is going to change much. It's the 
>python-dev and py3k lists where you'll need to take up the cudgels, 
>because I can almost guarantee nobody is going to take the GIL out of 
>2.6 or 2.7.

Actually, python-ideas is the right place for this.  Threads have been
hashed and rehashed over and over and over and over and over again
through the years; python-dev and python-3000 should not get cluttered
because another Quixote rides up.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"And if that makes me an elitist...I couldn't be happier."  --JMS


From horpner at yahoo.com  Wed Aug 15 14:42:23 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 15 Aug 2007 18:42:23 GMT
Subject: Module imports during object instantiation
References: <4c3vo4-u7k.ln1@learner.hq.netapp.com> <f9pcuj$6n4$1@sea.gmane.org>
	<mailman.1931.1187030415.22759.python-list@python.org>
	<46c16ec9$0$405$426a34cc@news.free.fr>
	<mailman.1956.1187091452.22759.python-list@python.org>
	<slrnfc36p9.21o.horpner@FIAD06.norwich.edu>
	<mailman.1965.1187101832.22759.python-list@python.org>
	<slrnfc3gg4.1l4.horpner@FIAD06.norwich.edu>
	<mailman.2025.1187200876.22759.python-list@python.org>
Message-ID: <slrnfc6ieo.14k.horpner@FIAD06.norwich.edu>

On 2007-08-15, Ritesh Raj Sarraf <rrs at researchut.com> wrote:
> Neil Cerutti wrote:
>
>>>
>>> Doesn't __init__ get called automatically ?
>> 
>> It gets called automatically when you construct an instance of
>> the class in which it's defined.
>
> I am a little confused by your statements now.
>
> In my earlier posts in the same thread, I gave some code example which was
> something like this:
>
> class Log:
>         def __init__():
>                 if os.name == 'posix':
>                         try:
>                                 import foobar
>                         except ImportError, e:
>                                 print >> sys.stderr, e
>
> (Sorry for the bad indentation)
>
> Now, what do you mean here by "construct an instance of the class in which
> it is defined" ?
>
> __init__() _is_ defined in the Log class and I try to create an instance of
> the class Log as:
>
> log = Log()
>
> Assuming it is run on a box which is POSIX compliant, the
> try/import should fail and I should see an error message
> because there is no module named foobar. But I don't see that.
> And this is what exactly I wanted to get clarified in this
> whole thread. (But still haven't got a clear answer to a
> Yes/No).
>
> Or am I terribly missing something that you are trying to tell ?

I didn't see log = Log() in your example. Sorry for the
excursion.

Are you sure os.name is 'posix' on your system?

-- 
Neil Cerutti
We've got to pause and ask ourselves: How much clean air do we really need?
--Lee Iacocca


From tdwdotnet at gmail.com  Mon Aug 20 15:32:54 2007
From: tdwdotnet at gmail.com (Tim Williams)
Date: Mon, 20 Aug 2007 20:32:54 +0100
Subject: reading a line in file
In-Reply-To: <R81735230.205.82812.1@mxextra>
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>
	<2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx>
	<R81735230.205.82812.1@mxextra>
Message-ID: <9afea2ac0708201232y49f9429dn51e497c66e13a93c@mail.gmail.com>

On 20/08/07, Shawn Milochik <Shawn at milochik.com> wrote:
> Hopefully this will help (using your input file)
>
> #!/usr/bin/env python
> import re
> buildinfo = "input.txt"
> input = open(buildinfo, 'r')
>
> regex = re.compile(r"^\s*build.number=(\d+)\s*$")
>
> for line in input:
>    if re.search(regex, line):
>        print line
>        buildNum = re.sub(r"^\s*build.number=(\d+)\s*$", "\\1", line)
>        print line
>        print buildNum
> --

If I misunderstood the original post and the build number is all that
is required from the file, then:

buildNum =  open('input.txt').read().split('build.number=')[1].split()[0]

:)


From arkanes at gmail.com  Wed Aug  1 15:31:51 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 1 Aug 2007 14:31:51 -0500
Subject: Pythonic way for missing dict keys
In-Reply-To: <pan.2007.07.29.04.10.19.329342@REMOVE.THIS.cybersource.com.au>
References: <mailman.938.1184958565.22759.python-list@python.org>
	<pan.2007.07.21.00.20.54.768439@REMOVE.THIS.cybersource.com.au>
	<mailman.954.1184989959.22759.python-list@python.org>
	<Xns99748CC2DB4AAduncanbooth@127.0.0.1>
	<1185041243.323915.161230@x40g2000prg.googlegroups.com>
	<mailman.984.1185101740.22759.python-list@python.org>
	<87lkd0eprj.fsf@pobox.com>
	<mailman.1279.1185623588.22759.python-list@python.org>
	<pan.2007.07.29.04.10.19.329342@REMOVE.THIS.cybersource.com.au>
Message-ID: <4866bea60708011231w7143c794vf800e054967c23ca@mail.gmail.com>

On 7/28/07, Steven D'Aprano <steve at remove.this.cybersource.com.au> wrote:
> On Sat, 28 Jul 2007 11:52:48 +0000, Alex Popescu wrote:
>
> > jjl at pobox.com (John J. Lee) wrote in news:87lkd0eprj.fsf at pobox.com:
> >
> >> Alex Popescu <nospam.themindstorm at gmail.com> writes:
> >>
> >>> Zentrader <zentraders at gmail.com> wrote in
> >>> news:1185041243.323915.161230 @x40g2000prg.googlegroups.com:
> >>>
> >>>> On Jul 21, 7:48 am, Duncan Booth <duncan.bo... at invalid.invalid>
> >>>> wrote:
> >>>>
> >>>> [snip...]
> >>>>
> >>>>
> >>>>>From the 2.6 PEP #361 (looks like dict.has_key is deprecated)
> >>>> Python 3.0 compatability: ['compatibility'-->someone should use a
> >>>> spell-checker for 'official' releases]
> >>>>         - warnings were added for the following builtins which no
> >>>> longer exist in 3.0:
> >>>>              apply, callable, coerce, dict.has_key, execfile,
> >>>>              reduce,
> >>>> reload
> >>>>
> >>>
> >>> I see... what that document doesn't describe is the alternatives to
> >>> be used. And I see in that list a couple of functions that are
> >>> probably used a lot nowadays (callable, reduce, etc.).
> >>
> >> callable and reduce are rarely used, at least in code I've seen.
> >
> > I thought G would be using that function a lot.
>
> Who or what is G? Guido?
>
> And which of the two functions mentioned is "that function"? callable()?
>
>
> Instead of doing:
>
>
> if callable(function): function()
>
> you should do:
>
> try:
>     function()
> except TypeError:
>     pass
>
>
> That should work for most uses of callable(), but isn't quite the same.
> (What if function() has side-effects, or is expensive, and you want to
> determine if it is callable, but not actually call it _now_?)
>

It's *really* not the same. Not only does it call the function, which
has all kinds of potential problems like you listed, but this also
will convert TypeErrors in the called function into "this is not a
callable", which is almost certainly not what you want. hasattr(x,
'__call__') works but is annoying to write and hides intent. I'd be
happy if inspect grew iscallable.


From pauland80 at gmail.com  Tue Aug  7 17:06:22 2007
From: pauland80 at gmail.com (pauland80 at gmail.com)
Date: Tue, 07 Aug 2007 21:06:22 -0000
Subject: [pyserial - winXP] Serial port stop receiving data after a few hours,
	raise no error
Message-ID: <1186520782.956696.155640@q75g2000hsh.googlegroups.com>

<snip>
>    My soft passively listen to a device sending +- 300 bytes of data each
>    second. After several hours of work, the soft abruptly stops receiving
>    data without any error, (while the device sends properly, of course)
>    and I need to restart it (the python soft) to "reactivate" the ports.
>
>    I read that when the serial port encounters an error (frame error or
>    so, I imagine?) it stop receiving data until the library function
>    "getCommError()" is called.
>
>    Am I on the good track? Can I call this function from my pyserial
>    code?
>
>    Why pyserial does'nt raise a serial.SerialException in this case?
>
>    Notes:
>    ---------
>    I'm not working with plain serial ports, I use serial over USB (FTDI
>    or so) and serial over Ethernet (moxa.com).
>    I'm in 115k 8N1 and I use 4 ports simultaneously
>    I use python 2.4 with pyserial 2.2 on Windows XP.
<snip>



Late thanks for your both answers! (Please excuse me for that)

The problem was a bug in the device firmware.
But before finding this, I dugg lightly in the pyserial source and
found (to take with care!) :

+ getCommError(...) is (?) no more implemented in the win32 API (it
was in the win16 API) ; it is replaced by GetCommState(...) ; pyserial
use GetCommState(...) in _reconfigurePort()

+ pyserial use ClearCommError in the functions read(...) and
inWaiting(...) ; it takes somewhat different arguments than
GetCommState(...) but return the same (?) info AND clear the errors
(getcomm(Error|State) doesn't (?)).

+ the errors on the serial flow (overrun and so) seem just cleared
away and not followed to the application by pyserial.

PA

the links :
delta win 16/32 on msdn : http://msdn2.microsoft.com/en-us/library/aa383678.aspx
GetCommState() on msdn : http://msdn2.microsoft.com/en-us/library/aa363260.aspx
ClearCommError() on msdn : http://msdn2.microsoft.com/en-us/library/aa363180.aspx



From gagsl-py2 at yahoo.com.ar  Mon Aug 27 00:00:21 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 27 Aug 2007 01:00:21 -0300
Subject: Error with Simplemapi.py
References: <1187938985.165186.300780@i38g2000prf.googlegroups.com>
Message-ID: <op.txo9evl7x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 24 Aug 2007 04:03:05 -0300, Mick Duprez <duprez at hinet.net.au>  
escribi?:

> I have a small problem. I get an error I don't know how to resolve,
> any help would be much appreciated.
> I'm using Python25 on winXP pro and the script from the link above.
> Here's the error -
>
>>>> mailtest.SendMail('noone at somewhere.net','test','test  
>>>> string','c:\dbs.txt')

That should be 'c:\\dbs.txt' or r'c:\dbs.txt'

> Traceback (most recent call last):
>   File "<pyshell#10>", line 1, in <module>
>     mailtest.SendMail('noone at somewhere.net','test','test string','c:
> \dbs.txt')
>   File "C:\Python25\mailtest.py", line 135, in SendMail
>     cast(NULL, lpMapiRecipDesc), RecipCnt, recip,
>   File "C:\Python25\lib\ctypes\__init__.py", line 478, in cast
>     return _cast(obj, obj, typ)
> ArgumentError: argument 1: <type 'exceptions.TypeError'>: wrong type
>>>>

I'm unsure what those cast(NULL, ...) are supposed to do, but they look  
all wrong. NULL, as defined on that script, is *not* a C NULL pointer (use  
None for that).
(In fact the whole script doesn't look well at all - do you *have* to use  
MAPI? can't use SMTP instead? Even if you must use MAPI, try the pywin32  
package from Mark Hammond, it has MAPI support and a demo script for  
sending mail)

> I have had a brief look at the C api for these structs and functions
> but I can't resolve it, it is probably something simple.
> The piece of code I don't understand though is this -
>
> MapiRecipDesc_A = MapiRecipDesc * len(RecipWork) #size of struct??

This declares a new type, an array of len(RecipWork) items, each of type  
MapiRecipDesc

> rda = MapiRecipDesc_A() # isn't it MapiRecipDesc as declared??

This creates an instance of the above array.

-- 
Gabriel Genellina



From zyzhu2000 at gmail.com  Sat Aug 18 21:40:22 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Sun, 19 Aug 2007 01:40:22 -0000
Subject: How to call module functions inside class instance functions?
In-Reply-To: <mailman.2154.1187486317.22759.python-list@python.org>
References: <1187484041.838615.259980@e9g2000prf.googlegroups.com>
	<mailman.2154.1187486317.22759.python-list@python.org>
Message-ID: <1187487622.450655.265000@q4g2000prc.googlegroups.com>

On Aug 18, 8:18 pm, Steve Holden <st... at holdenweb.com> wrote:
> beginner wrote:
> > Hi Everyone,
>
> > I have encountered a small problems.  How to call module functions
> > inside class instance functions? For example,  calling func1 in func2
> > resulted in a compiling error.
>
> > "my module here"
>
> > def func1():
> >      print "hello"
>
> > class MyClass:
> >    def func2():
> >          #how can I call func1 here.
> >          func1() #results in an error
>
> If you had bothered to include the error message it would have been
> obvious that the problem with your code isn't in body of the method at
> all - you have failed to include an argument to the method to pick up
> the instance on which the method is called. I am guessing that when you
> create an instance and call its func2 method you see the message
>
> Traceback (most recent call last):
>    File "test07.py", line 12, in <module>
>      myInstance.func2()
> TypeError: func2() takes no arguments (1 given)
>
> which would have been a very useful clue. Please include the traceback
> in future! Here's a version of your program that works.
>
> sholden at bigboy ~/Projects/Python
> $ cat test07.py
> "my module here"
>
> def func1():
>       print "hello"
>
> class MyClass:
>     def func2(self):
>           #how can I call func1 here.
>           func1() #results in an error
>
> myInstance = MyClass()
> myInstance.func2()
>
> sholden at bigboy ~/Projects/Python
> $ python test07.py
> hello
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------- Hide quoted text -
>
> - Show quoted text -

I apologize for not posting the exact code and error message. The
missing "self" is due to a typo of mine. It is not really the problem
I am encountering.

testmodule.py
-----------------
"""Test Module"""

def __module_level_func():
    print "Hello"

class TestClass:
    def class_level_func(self):
        __module_level_func()


main.py
------------------
import testmodule

x=testmodule.TestClass()
x.class_level_func()


The error message I am encountering is: NameError: global name
'_TestClass__module_level_func' is not defined

I think it has something to do with the two underscores for
__module_level_func. Maybe it has something to do with the python
implementation of the private class level functions.

By the way, the reason I am naming it __module_level_func() is because
I'd like __module_level_func() to be private to the module, like the C
static function. If the interpreter cannot really enforce it, at least
it is some sort of naming convention for me.

Thanks,
Geoffrey



From python at jayloden.com  Wed Aug 15 19:44:32 2007
From: python at jayloden.com (Jay Loden)
Date: Wed, 15 Aug 2007 19:44:32 -0400
Subject: replacement for string.printable
In-Reply-To: <20070815185601.GA9275@spookie1.spookiegate>
References: <20070815185601.GA9275@spookie1.spookiegate>
Message-ID: <46C38FE0.3090502@jayloden.com>

John K Masters wrote:
>>From what I have read the string module is obsolete and should not be
> used but I am working on a project that parses printable files created
> in a DOS program and creates a web page for each file. I am using the
> string.printable constant to determine which characters should be kept;
> the files contain many print control codes. There seems to be nothing
> like this in the string methods. isalnum() seems the nearest but gives
> false for '+' '!' etc.
> 
> I realise I could define a global string to cover this but wondered if
> there was another, better, way
> 
> Regards, John

I could be misunderstanding the docs, but my understanding is that only the following in the string module are deprecated: 

http://docs.python.org/lib/node42.html

The rest of the string module isn't going away, just the above. (List members, please correct me if I'm wrong here!). 

-Jay


From nicolasg at gmail.com  Wed Aug  1 02:50:27 2007
From: nicolasg at gmail.com (NicolasG)
Date: Wed, 01 Aug 2007 06:50:27 -0000
Subject: Where do they tech Python officialy ?
In-Reply-To: <1i23wyk.avc945i4dwsiN%aleax@mac.com>
References: <1185209574.045112.163780@g4g2000hsf.googlegroups.com>
	<7xveca4ajp.fsf@ruckus.brouhaha.com>
	<1185265091.276958.239910@r34g2000hsd.googlegroups.com>
	<1i23wyk.avc945i4dwsiN%aleax@mac.com>
Message-ID: <1185951027.061072.188280@g4g2000hsf.googlegroups.com>


> Open source projects do not require previous professional experience to
> accept volunteers.  So, one way out of your dilemma is to make a name
> for yourself as an open source contributor -- help out with Python
> itself and/or with any of the many open source projects that use Python,
> and you will both learn a lot _and_ acquire "professional experience"
> that any enlightened employer will recognize as such.  That will take a
> while, but not as long as getting a college degree (and it will be far
> cheaper than the degree).
>
> Alex

I think this is the best idea to escape the python amateur circle and
go in to open source project that are considered to be professional
projects. I don't know if it will be better to find a project to
contribute or to start a new one .. Will have a look around and think
about.



From kyosohma at gmail.com  Fri Aug 10 10:23:32 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 10 Aug 2007 07:23:32 -0700
Subject: Smoother Lines in Turtle Graphics
In-Reply-To: <1186703789.695265.52390@e9g2000prf.googlegroups.com>
References: <1186703789.695265.52390@e9g2000prf.googlegroups.com>
Message-ID: <1186755812.004575.234180@e9g2000prf.googlegroups.com>

On Aug 9, 6:56 pm, tomy <zargar26... at gmail.com> wrote:
> Hi All
> I am a newbie to turtle graphics in python, so sorry if you find this
> question too easy.
> How can I get smoother lines in turtle graphics?
> I am using python on windows.
>
> Thanks in advance

You may be better off using PIL or pygame for this sort of thing.

Mike



From lycka at carmen.se  Thu Aug  2 05:12:00 2007
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 02 Aug 2007 11:12:00 +0200
Subject: Python end of file marker similar to perl's __END__
In-Reply-To: <qv2si.37263$G23.1227@newsreading01.news.tds.net>
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
	<1185976656.753817.27980@x40g2000prg.googlegroups.com>
	<slrnfb17m5.224.horpner@FIAD06.norwich.edu>
	<eml6o4-tvd.ln1@lairds.us>
	<qv2si.37263$G23.1227@newsreading01.news.tds.net>
Message-ID: <f8s750$b0m$1@wake.carmen.se>

Neil Cerutti wrote:
> On 2007-08-01, Cameron Laird <claird at lairds.us> wrote:	.
>> I want to re-emphasize the "triple-quote it" tip mentioned
>> earlier in this thread.  I think the original questioner
>> will find this quite satisfying, if I understand his situ-
>> ation at all.
>>
>> *I* certainly have source code with embedded "junk" 
>> commented out as multi-line strings.
> 
> I used to do that, but now that I use doctests so much it's
> infeasible to comment out arbitrary code that way, since they
> can't necessarily nest.

If you consistently use e.g. ''' for doc strings, you can use
""" to comment out code blocks.

I still think it's better to do test-driven programming though.
Then you will very rarely have large blocks on non-working code.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Aug  6 03:41:57 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 06 Aug 2007 09:41:57 +0200
Subject: Global package variable, is it possible?
In-Reply-To: <1186160415.065108.139160@e9g2000prf.googlegroups.com>
References: <1186160415.065108.139160@e9g2000prf.googlegroups.com>
Message-ID: <46b6d0b4$0$29273$426a74cc@news.free.fr>

Chris Allen a ?crit :
> Hello fellow pythoneers.  I'm stumped on something, and I was hoping
> maybe someone in here would have an elegant solution to my problem.
> This is the first time I've played around with packages, so I'm
> probably misunderstanding something here...
> 
> Here's what I'd like to do in my package.  I want my package to use a
> configuration file, and what I'd like is for the config file to appear
> magically in each module so I can just grab values from it without
> having to load and parse the config file in each package module.  Not
> quite understanding how the __init__.py file works, I expected it to
> be as easy as just setting up the ConfigParser object and then I
> figured (since a package is a module) that it would now be global to
> my package and I could access it in my modules, but I was wrong...  I
> don't want to have to pass it in to each module upon init, or anything
> lame like that.  A main reason for this is that I'd like to be able to
> reload the config file dynamically and have all my modules
> automatically receive the new config.  There must be a way to do this,
> but seeing how __init__.py's namespace is not available within the
> package modules, I don't see a simple and elegant way to do this.
> Does anybody have any suggestions?  Thanks!
> 

Hi Chris...
I've read all the thread, and it seems that your problem is mostly to 
share a single dynamic state (the config) between several modules. So I 
do wonder: have you considered the use of the Singleton pattern (or one 
of it's variants...) ?


From kyosohma at gmail.com  Wed Aug 15 15:56:48 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 15 Aug 2007 12:56:48 -0700
Subject: Move files/directories to Recycle Bin using standard Python libs
In-Reply-To: <mailman.2027.1187204570.22759.python-list@python.org>
References: <f9va80$ciu$1@foggy.unx.sas.com>
	<mailman.2027.1187204570.22759.python-list@python.org>
Message-ID: <1187207808.556357.125850@q3g2000prf.googlegroups.com>

On Aug 15, 2:02 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/15/07, Kevin D.Smith <Kevin.Sm... at sas.com> wrote:
>
> > I would like to move files and directories to the Recycle Bin on
> > Windows from Python.  I have found some older articles describing how
> > to do this, but they require additional packages to be installed.  I'm
> > working on a plugin for an existing project and only have the standard
> > library to work with.  Is there a way to use the Recycle Bin using
> > standard Python?
>
> > --
> > Kevin D. Smith
>
> Not easily. The recycle bin is part of the shell, and the shell api
> calls have very complicated struct parameters that are cumbersome to
> use correctly from ctypes. If you do the work to map the fileop
> structs to ctypes you can call the shell API file operation functions
> in shell32.dll. This assumes that "standard" for you is Python 2.5,
> which has ctypes. Otherwise you are out of luck.

Technically, you can download ctypes for 2.3/2.4 as well or compile it
for whatever version you want, I think. See here:
http://sourceforge.net/project/showfiles.php?group_id=71702&package_id=71318

Besides, you can bypass ctypes and use SHFileOperation to do it, as is
shown here:
http://tgolden.sc.sabren.com/python/win32_how_do_i/copy-a-file.html

Mike



From bbxx789_05ss at yahoo.com  Mon Aug 13 05:21:19 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 13 Aug 2007 02:21:19 -0700
Subject: wx.ListBox drag and drop
In-Reply-To: <1186981611.589404.117770@l70g2000hse.googlegroups.com>
References: <1186981611.589404.117770@l70g2000hse.googlegroups.com>
Message-ID: <1186996879.875886.128490@57g2000hsv.googlegroups.com>

On Aug 12, 11:06 pm, ianar? <ian... at gmail.com> wrote:
> Hey all,
>
> I see plenty of drag and drop examples but they are all for
> wx.ListCtrl. Anyone know of examples or tutorials for wx.ListBox?
> Specifically, I would like to be able to drag a selection from one
> ListBox to another.
>
> Thanks in advance,
>
> - ianar?

See if this helps:

-----
import wx

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, "List Boxes")
        panel = wx.Panel(self, -1)

        choices1 = ["red", "green", "blue"]
        choices2 = ["10", "20", "30"]

        self.lb1 = wx.ListBox(panel, -1, (10, 10),
                  (100, 200), choices1, wx.LB_SINGLE)
        self.lb1.Bind(wx.EVT_LISTBOX, self.on_select)


        lb2 = wx.ListBox(panel, -1, (120, 10),
                  (100, 200), choices2, wx.LB_SINGLE)
        target = MyTextTarget(lb2)  #MyTextTarget defined below
        lb2.SetDropTarget(target)

    def on_select(self, event):
        selection = self.lb1.GetSelection()

        text = self.lb1.GetStringSelection()
        text_obj = wx.TextDataObject(text)

        source = wx.DropSource(self.lb1)
        source.SetData(text_obj)

        drop_result = source.DoDragDrop(wx.Drag_DefaultMove)
        if drop_result == wx.DragMove:  #the selection was moved-not
copied
            self.lb1.Delete(selection)


class MyTextTarget(wx.TextDropTarget):
    def __init__(self, target_widget):
        wx.TextDropTarget.__init__(self)
        self.target_widget = target_widget

        self.text_obj = wx.TextDataObject()
        self.SetDataObject(self.text_obj)

    def OnData(self, x, y, default):  #called automatically on drop
        self.GetData()
        text = self.text_obj.GetText()

        end_of_list = self.target_widget.GetCount()
        self.target_widget.InsertItems([text], end_of_list)

        return default


app = wx.PySimpleApp(redirect=False)

win = MyFrame()
win.Show()

app.MainLoop()
---------

The EVT_LISTBOX appears to be slightly broken on a mac.  It doesn't
fire if you click on a selection that is already selected.



From joshua at eeinternet.com  Thu Aug  2 20:00:17 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Thu, 02 Aug 2007 16:00:17 -0800
Subject: (no) fast boolean evaluation ?
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<cfb58d850708021619s298f69b9p3af86905d1695939@mail.gmail.com>
Message-ID: <f8tr6h$bn0$1@sea.gmane.org>

On Thursday 02 August 2007 15:19, Evan Klitzke wrote:
>> I discovered that boolean evaluation in Python is done "fast"
>> (as soon as the condition is ok, the rest of the expression is ignored).
> 
> This is standard behavior in every language I've ever encountered.

Then you've never programmed in VB (at least 6, don't know if .net still
does this).  Nested IF statements. AAAAAAAAAAAAAAAAAAAACK!  Thankfully, I
program mostly in Python these days.  Haven't touched VB in years.  Maybe
you should have said:

"This is standard behavior in every real programming language."

There, that should start a flame war. :)

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From semanticist at gmail.com  Tue Aug 14 21:31:59 2007
From: semanticist at gmail.com (Miles)
Date: Tue, 14 Aug 2007 21:31:59 -0400
Subject: What order does info get returned in by os.listdir()
In-Reply-To: <1187131583.114731.279180@g12g2000prg.googlegroups.com>
References: <gemini.jms7ay00fafcf00k8@jernic.by.invalid>
	<1187131583.114731.279180@g12g2000prg.googlegroups.com>
Message-ID: <a49e45f50708141831w3ef3260dy6ba2e2b2917f73cb@mail.gmail.com>

On 8/14/07, Zentrader wrote:
> On Aug 14, 1:52 pm, Jeremy C B Nicoll wrote:
> > When I use os.listdir() to return that list of leaf values, I do seem to get
> > them in alphabetical order, A before B before C etc, but the ~-prefixed ones
> > are returned after the Z-prefixed files rather than before the A-ones.
>
> I think that os.listdir() returns file names in chronological order,
> that is in the order they were created on disk.

http://docs.python.org/lib/os-file-dir.html
The order is arbitrary, and depends on the underlying directory
structure and system calls.  If you rely on the order being sorted,
you should do it yourself.

-Miles


From horpner at yahoo.com  Fri Aug 31 08:57:15 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 31 Aug 2007 12:57:15 GMT
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
Message-ID: <slrnfdg413.1e8.horpner@FIAD06.norwich.edu>

On 2007-08-31, Ricardo Ar?oz <ricaraoz at gmail.com> wrote:
> Russ wrote:
>> Yes, thanks for reminding me about that. With SPARK Ada, it is
>> possible for some real (non-trivial) applications to formally
>> (i.e., mathematically) *prove* correctness by static analysis.
>> I doubt that is possible without "static declarative type-
>> checking."
>> 
>> SPARK Ada is for applications that really *must* be correct or
>> people could die.
>
> I've always wondered... Are the compilers (or interpreters),
> which take these programs to machine code, also formally proven
> correct? And the OS in which those programs operate, are they
> also formally proven correct? And the hardware, microprocessor,
> electric supply, etc. are they also 'proven correct'?

Who watches the watchmen? The contracts are composed by the
programmers writing the code. Is it likely that the same person
who wrote a buggy function will know the right contract?

-- 
Neil Cerutti
The third verse of Blessed Assurance will be sung without musical
accomplishment. --Church Bulletin Blooper


From Graham.Dumpleton at gmail.com  Wed Aug 29 21:50:41 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Thu, 30 Aug 2007 01:50:41 -0000
Subject: How to use os.putenv() ?
In-Reply-To: <1188436871.549201.315170@g4g2000hsf.googlegroups.com>
References: <1188436871.549201.315170@g4g2000hsf.googlegroups.com>
Message-ID: <1188438641.676443.121510@x35g2000prf.googlegroups.com>

On Aug 30, 11:21 am, goo... at tyeon.com wrote:
> >>> import os
>
> >>> os.environ['PATH']
>
> 'C:\\WINNT\\system32;C:\\WINNT;C:\\WINNT\\System32\\Wbem;%C:\\WINNT%\
> \system32;%C:\\WINNT%;%C:\\WINNT%\\System32\\Wbem'
>
> >>> os.putenv('PATH', 'C:\\WINNT\\system32')
>
> >>> os.environ['PATH']
>
> 'C:\\WINNT\\system32;C:\\WINNT;C:\\WINNT\\System32\\Wbem;%C:\\WINNT%\
> \system32;%C:\\WINNT%;%C:\\WINNT%\\System32\\Wbem'
>
>
>
> What am I doing wrong?  How do I change the value of an environment
> variable?

What you are missing is that os.environ is only populated from the
global process environment at process startup.

If you update os.environ the changes will be pushed into the global
process environment as well. But if you use os.putenv() instead,
bypassing os.environ, the changes will not show in os.environ.

To confirm that the global process environment is being updated, use
os.getenv().

Graham



From gagsl-py2 at yahoo.com.ar  Tue Aug 28 04:45:35 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 28 Aug 2007 01:45:35 -0700
Subject: Chaining programs with pipe
In-Reply-To: <fb0alf$hgr$3@lust.ihug.co.nz>
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
	<13cnbi87neru8c3@corp.supernews.com>
	<mailman.97.1187757319.32294.python-list@python.org>
	<13cogr3n6no937b@corp.supernews.com>
	<1187795716.083417.299540@q4g2000prc.googlegroups.com>
	<fau28j$gle$3@lust.ihug.co.nz>
	<mailman.51.1188274035.28954.python-list@python.org>
	<fb0alf$hgr$3@lust.ihug.co.nz>
Message-ID: <1188290735.746264.280650@y42g2000hsy.googlegroups.com>

On 28 ago, 02:11, Lawrence D'Oliveiro <l... at geek-
central.gen.new_zealand> wrote:
> In message <mailman.51.1188274035.28954.python-l... at python.org>, Gabriel
>
>
>
>
>
> Genellina wrote:
> > En Mon, 27 Aug 2007 05:35:51 -0300, Lawrence D'Oliveiro
> > <l... at geek-central.gen.new_zealand> escribi?:
>
> >> In message <1187795716.083417.299... at q4g2000prc.googlegroups.com>,
> >> Gabriel Genellina wrote:
>
> >>> On 22 ago, 11:08, Grant Edwards <gra... at visi.com> wrote:
>
> >>>> but I'm a Unix guy who occasionally tries
> >>>> to ship a Windows version of a Python app: the concept of a
> >>>> process defaulting to having a stderr or stdout that wasn't
> >>>> writable was utterly foreign to me.
>
> >>> Ah, that explains your previous post telling that things on Windows
> >>> don't work as they "should". They work, but not necesarily as a
> >>> "foreigner" would expect.
>
> >> So what's the good reason for Windows having unusable defaults for stderr
> >> and stdout, then?
>
> > You should ask the wxPython/wxWidgets guys why they choose to do things
> > that way.
>
> But I assumed you knew, since you were the one who used to term "foreigner"
> to describe Grant Edwards' mystification at why things worked this way. So
> in fact you are equally a "foreigner" to the way Windows works?

I do know how to create console applications, but that is not
relevant. If a wxPython application crashes when something is written
to stdout/stderr, this is either the programmer fault or the framework
fault, *not* Windows fault. As I said, a Tk application doesn't crash
in those circunstances, by example. Many other applications don't
crash either. The default behavior for a GUI application is to simply
discard the output.
(And my comment was not referring to that specific problem - this
thread is too broad now).

> > Tk programs don't have that problem, by example: you have a GUI
> > *and* a console, if you want. A simple print statement with no console
> > just goes into void space - no error, no crash, no GPF...
> > You get what you ask for: if you pass /SUBSYSTEM:WINDOWS as an option to
> > the linker (or put equivalent flags in the executable) you don't get a
> > console by default. That's fine for most GUI programs that don't use
> > stdout/stderr. If you want a console, create one using AllocConsole.

> But why should I need to do that?

Because the distinction IS relevant on Windows?

> On Unix/Linux systems, there is no
> distinction between "GUI" and "non-GUI" programs--_all_ processes can (and
> usually do) have stdin, stdout and stderr.

On Windows, windowed applications (as opposed to console applications)
start with no stdin/stdout/stderr by default. The application
developer can modify that if desired, of course - I've menctioned some
ways to do that.
This fact simply means that those OS's *are* different - most of the
time one can ignore the differences, but not always. Neither of them
is doing the absolute "Right Thing".

> stderr is particularly important
> for GUI programs, so the desktop environment typically captures this to a
> file, commonly called ".xsession-errors". This is very useful when things
> go wrong (programs crash etc), to see what error messages were reported.

There are plenty of logging systems to choose. Redirecting stderr to a
file can be done either by the app itself or by its caller (for a well
behaved application, of course; the crashing wxPython app menctioned
earlier appears not to be one of those).

--
Gabriel Genellina



From greg at cosc.canterbury.ac.nz  Wed Aug  8 20:51:43 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Thu, 09 Aug 2007 12:51:43 +1200
Subject: Something in the function tutorial confused me.
In-Reply-To: <mailman.1737.1186577596.22759.python-list@python.org>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>	<46B8626A.2070303@bigfoot.com>	<mailman.1726.1186537161.22759.python-list@python.org>	<5hsoi3F3mlni2U1@mid.individual.net>
	<mailman.1737.1186577596.22759.python-list@python.org>
Message-ID: <5hv705F3mk67nU1@mid.individual.net>

Steve Holden wrote:

> For some reason your reply got right up my nose,

I'm sorry about that. Sometimes it's hard to judge the
level of experience with Python that a poster has. In
discussions about this particular topic, often it turns
out that the person is a newcomer to Python who is
using the wrong mental model of assignment, and your
comment about None being immutable suggested that this
is what was going on. If I was mistaken about that,
then I apologise.

While it may not have been what you meant, what you
*seemed* to be saying is that the result of a (plain)
assignment somehow depends on what was previously
bound to the name being assigned. I was just trying
to point out that this is not true.

The reason I suggested trying an example is that it
can be hard to talk about these things clearly when
you're not sure whether the words you're using, such
as "assignment", mean the same thing to the person
on the other end. The interpreter always interprets
things unambiguously.

--
Greg


From paul at boddie.org.uk  Thu Aug 16 07:21:07 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Thu, 16 Aug 2007 04:21:07 -0700
Subject: Hijack! Different book: (was: Opinions about this new Python book?
In-Reply-To: <13c6fb3pntv6n13@corp.supernews.com>
References: <mailman.1957.1187093157.22759.python-list@python.org>
	<1187096231.194685.86030@m37g2000prh.googlegroups.com>
	<20070814154913.D8C3C1E400A@bag.python.org>
	<8a6b8e350708141020q495b22der4c362ee3df618d82@mail.gmail.com>
	<mailman.1979.1187113641.22759.python-list@python.org>
	<1187117012.088495.247890@q4g2000prc.googlegroups.com>
	<1187191950.037749.8050@z24g2000prh.googlegroups.com>
	<13c6fb3pntv6n13@corp.supernews.com>
Message-ID: <1187263267.314987.253590@a39g2000hsc.googlegroups.com>

On 15 Aug, 19:52, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
>         Hopefully it isn't quite as annoying as some of what I've found in
> the Turbogears book that recently arrived from Amazon. (Rapid Web
> Applications with TurboGears)

Is this the book that came out before TurboGears even reached 1.0,
probably having diminished relevance now that there are 1.1 and 2.0
releases being worked on? I'm very much in favour of book
availability, and I pity the people writing Python books given
continuous changes to the language and the associated recommended
development practices as new features go in, but tracking a target
prior to any kind of stable release seems a bit too ambitious,
especially for a book in print.

Paul



From laurent.pointal at wanadoo.fr  Sat Aug 25 09:56:47 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Sat, 25 Aug 2007 15:56:47 +0200
Subject: curses library
References: <mailman.1980.1187115104.22759.python-list@python.org>
Message-ID: <46d0351f$0$5090$ba4acef3@news.orange.fr>

Ghirai wrote:

> Hello list,
> 
> I need to write a console application.
> 
> Are there any wrappers around curses/ncurses?
> Or any other similar libraries?
> 
> Thanks.

I have some links here:
http://www.limsi.fr/Individu/pointal/python.html#liens-graph-curses

A+

Laurent.



From pavlovevidence at gmail.com  Thu Aug 16 19:03:40 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 16 Aug 2007 16:03:40 -0700
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
Message-ID: <1187305420.464078.156440@x35g2000prf.googlegroups.com>

On Aug 16, 6:35 pm, beginner <zyzhu2... at gmail.com> wrote:
> Hi All.
>
> I'd like to do the following in more succint code:
>
> if k in b:
>     a=b[k]
> else:
>     a={}
>     b[k]=a
>
> a['A']=1
>
> In perl it is just one line: $a=$b->{"A"} ||={}.
>
> Thanks,
> Geoffrey

Define b as a default dict:

b = defaultdict(dict)
b[k]['A'] = l



Carl Banks



From jergosh at wp.pl  Wed Aug  8 16:49:51 2007
From: jergosh at wp.pl (=?UTF-8?B?R3J6ZWdvcnogU8WCb2Rrb3dpY3o=?=)
Date: Wed, 08 Aug 2007 22:49:51 +0200
Subject: A question on plugin design
In-Reply-To: <46B5AFFA.3030301@wp.pl>
References: <46B5AFFA.3030301@wp.pl>
Message-ID: <46BA2C6F.1040207@wp.pl>

Very insightful, thank you for your replies. I was initially thinking it 
would be simpler to implement my own system but perhaps using a 
ready-made one will be more elegant and potential plugin makers would 
find it more familiar.

Cheers,
Greg.


From rag at nospam.techline.com  Sun Aug 19 22:24:35 2007
From: rag at nospam.techline.com (Randall Ainsworth)
Date: Sun, 19 Aug 2007 19:24:35 -0700
Subject: Latest models of Gibson guitars
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<QsCdnfC5hI4ENFXbnZ2dnUVZ8v2vnZ2d@bt.com>
Message-ID: <190820071924351381%rag@nospam.techline.com>

In article <QsCdnfC5hI4ENFXbnZ2dnUVZ8v2vnZ2d at bt.com>, Hermit
<hermit at please.dont.bother.com> wrote:

> How does the image quality compare with a DSLR?

Depends on whether it's a Paul or a Strat.


From steven.bethard at gmail.com  Thu Aug 30 21:24:11 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 30 Aug 2007 19:24:11 -0600
Subject: reload(sys)
In-Reply-To: <1188521143.421431.119100@l22g2000prc.googlegroups.com>
References: <1188521143.421431.119100@l22g2000prc.googlegroups.com>
Message-ID: <JK2dnSgydPkg8ErbnZ2dnUVZ_u3inZ2d@comcast.com>

S?nmez Kartal wrote:
> I've had an encoding issue and solved it by
> "sys.setdefaultencoding('utf-8')"...
> 
> My first try wasn't successful since setdefaultencoding is not named
> when I imported sys module. After, I import sys module, I needed to
> write "reload(sys)" also.
> 
> I wonder why we need to call "reload(sys)" to get setdefaultencoding
> named?

sys.setdefaultencoding is purposely deleted from the sys module after 
it's loaded because you really shouldn't be using it. The reload() call 
restores the deleted attribute.

If you'd like a less brittle solution to your encoding issue, explain 
what the issue was, and people here can probably help you find a better 
solution.

STeVe


From seun.osewa at gmail.com  Mon Aug 13 15:50:05 2007
From: seun.osewa at gmail.com (Seun Osewa)
Date: Mon, 13 Aug 2007 19:50:05 -0000
Subject: The Future of Python Threading
In-Reply-To: <1186833569.074364.153320@b79g2000hse.googlegroups.com>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<1186833569.074364.153320@b79g2000hse.googlegroups.com>
Message-ID: <1187034605.700372.198980@d55g2000hsg.googlegroups.com>

On Aug 11, 12:59 pm, Kay Schluehr <kay.schlu... at gmx.net> wrote:
> Have you checked out the processing [1] package? I've currently the
> impression that people want to change the whole language before they
> checkout a new package. It would be nice to read a review.
>
> [1]http://cheeseshop.python.org/pypi/processing

Sounds interesting.  How does it work?  tell us about it!



From gnewsg at gmail.com  Wed Aug 22 07:01:05 2007
From: gnewsg at gmail.com (billiejoex)
Date: Wed, 22 Aug 2007 04:01:05 -0700
Subject: Extracting the traceback
In-Reply-To: <mailman.93.1187745085.32294.python-list@python.org>
References: <1187740411.848743.151960@x35g2000prf.googlegroups.com>
	<mailman.90.1187741360.32294.python-list@python.org>
	<1187744252.157335.91630@x40g2000prg.googlegroups.com>
	<mailman.93.1187745085.32294.python-list@python.org>
Message-ID: <1187780465.146576.286760@e9g2000prf.googlegroups.com>

On 22 Ago, 03:11, "Evan Klitzke" <e... at yelp.com> wrote:
> On 8/21/07, codesite-noreply <billiej... at gmail.com> wrote:
>
>
>
>
>
> > On 22 Ago, 02:09, "Evan Klitzke" <e... at yelp.com> wrote:
> > > On 8/21/07, billiejoex <gne... at gmail.com> wrote:
>
> > > > Hi there,
> > > > I'm facing a case where I need to get the traceback outptut when
> > > > occurring an exception.
> > > > I solved such problem by using traceback module in conjunction with
> > > > StringIO:
>
> > > > import StringIO, traceback
> > > > try:
> > > >     raise Exception
> > > > except:
> > > >     f = StringIO.StringIO()
> > > >     traceback.print_exc(file=f)
> > > >     print f.getvalue()
>
> > > > ... but this seems a little poor to me since I first put output into
> > > > the StringIO.StringIO(), then I get it back by using getvalue() on
> > > > it.
> > > > Is there a way to avoid the use of StringIO and get such output
> > > > without using such (useless) additional step?
>
> > > If you just want to print the output (as in your example), you can use
> > > file=sys.stdout or file=sys.stderr in the call to print_exc. If you
> > > want to store the traceback into a string for some other purpose (e.g.
> > > logging, email notifications) I believe that you must use a StringIO
> > > object.
>
> > > --
> > > Evan Klitzke <e... at yelp.com>
>
> > Unfortunately I have to pass the output to a function which prints the
> > passed string both on screen and into a log file.
> > Anyway, not too much important. I'll use StringIO if there's no other
> > solution.
>
> Turns out I was wrong -- you can just get the string, using format_exc
> rather than print_exc.
>
> --
> Evan Klitzke <e... at yelp.com>- Nascondi testo tra virgolette -
>
> - Mostra testo tra virgolette -

Thanks



From ttkk1024 at gmail.com  Sun Aug 26 23:24:55 2007
From: ttkk1024 at gmail.com (smalltalk)
Date: Sun, 26 Aug 2007 20:24:55 -0700
Subject: how setup a dll file as a module?
Message-ID: <1188185095.421047.195770@q3g2000prf.googlegroups.com>



in arcgis , arcgisscripting is a dll file
there is a script as following:

import  arcgisscripting
gp = arcgisscripting.create()

why can the script run?
how can we setup a dll file as a module?



From claird at lairds.us  Sat Aug 11 06:50:27 2007
From: claird at lairds.us (Cameron Laird)
Date: Sat, 11 Aug 2007 10:50:27 +0000
Subject: The Future of Python Threading
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<1186782710.600889.245930@j4g2000prf.googlegroups.com>
	<1186802188.653072.236260@x40g2000prg.googlegroups.com>
	<1186807396.988368.201400@b79g2000hse.googlegroups.com>
Message-ID: <jsg0p4-7hh.ln1@lairds.us>

In article <1186807396.988368.201400 at b79g2000hse.googlegroups.com>,
Seun Osewa  <seun.osewa at gmail.com> wrote:
>> I think I've heard Guido say the last attempt at removing the Global
>> Interpreter Lock (GIL) resulted in a Python that was much slower...
>
>What is it about Python that makes a thread-safe CPython version much
>slower?  Why doesn'ttrue threading slow down other languages like Perl
>and Java?
>
>I'm thinking it might be the reference counting approach to memory
>management... but what do you guys think is the reason?
>

Crudely, Perl threading is fragile, and Java requires
coding at a lower level.

Memory management is indeed important, and arguably 
deserves at least as much attention as multi-core
accomodations.  I know of no easy gains from here
on, just engineering trade-offs.


From deets at nospam.web.de  Mon Aug 27 06:45:07 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 27 Aug 2007 12:45:07 +0200
Subject: how setup a dll file as a module?
References: <1188185095.421047.195770@q3g2000prf.googlegroups.com>
Message-ID: <5jfo9jF3tdo90U1@mid.uni-berlin.de>

smalltalk wrote:

> 
> 
> in arcgis , arcgisscripting is a dll file
> there is a script as following:
> 
> import  arcgisscripting
> gp = arcgisscripting.create()
> 
> why can the script run?
> how can we setup a dll file as a module?

There can be python-extension that are essentially C-modules. You can write
them your own, or using various wrapper technologies. See 

http://docs.python.org/ext/ext.html

for starters, and google

SIP
boost::python
SWIG
PyRex

for more information.

Diez


From Cartuners at gmail.com  Sun Aug 19 13:39:54 2007
From: Cartuners at gmail.com (Cartuners at gmail.com)
Date: Sun, 19 Aug 2007 17:39:54 -0000
Subject: A/C Systems!
Message-ID: <1187545194.099278.217330@w3g2000hsg.googlegroups.com>

Everything you need to know about car air conditioners...

http://car-air-conditioning.blogspot.com/



From cai.haibin at gmail.com  Wed Aug 22 01:28:27 2007
From: cai.haibin at gmail.com (james_027)
Date: Wed, 22 Aug 2007 05:28:27 -0000
Subject: for statement on empty iterable
Message-ID: <1187760507.951994.50310@q4g2000prc.googlegroups.com>

hi,

I need to do some for loop on iterables which could be empty
sometimes, for example

a_list = []

for i in a_list:
 #do something

is this safe? or should I put a if statement to test it first?

Thanks
james



From bj_666 at gmx.net  Wed Aug 15 15:03:17 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 15 Aug 2007 19:03:17 GMT
Subject: replacement for string.printable
References: <mailman.2026.1187204186.22759.python-list@python.org>
Message-ID: <5ih0vlF3mc1akU2@mid.uni-berlin.de>

On Wed, 15 Aug 2007 19:56:01 +0100, John K Masters wrote:

> From what I have read the string module is obsolete and [?]

The `string` module isn't obsolete.  It even contains a more or less
recent new addition: `Template`.  Only the functions that are also
available as methods on `str` are deprecated.

Ciao,
	Marc 'BlackJack' Rintsch


From Shawn at Milochik.com  Mon Aug 20 11:45:42 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Mon, 20 Aug 2007 11:45:42 -0400
Subject: question
In-Reply-To: <1187574897.183659.22140@l22g2000prc.googlegroups.com>
References: <1187373737.410546.70930@w3g2000hsg.googlegroups.com>
	<fa4pn7$5sh$03$1@news.t-online.com>
	<1187574897.183659.22140@l22g2000prc.googlegroups.com>
Message-ID: <2dc0c81b0708200845r5380e64ag9e33b7009e123885@mail.gmail.com>

<snip>
> And Shawn, I didn't post any of my work because the network I work on
> isn't
> connected to the internet. So it didn't seem constructive to re-type
> all of my
> failed code just to satisfy your "standards" of proving that I've been
> trying to
> hack this myself for the past few days. All in all, thanks for your,
> uhhhh,
> constructive comments.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


Your original post said clearly that you didn't post your code because
it didn't work. That's a completely different reason/excuse than "no
Internet connection so I didn't want to re-type it." So either you're
lying or lazy, and in either case I don't appreciate your snarky
comments about my "uhhh constructive" comments.

Don't get me wrong -- I'm not saying you're definitely being
dishonest, but you have to admit that the appearance you gave is
questionable, and questionable behavior on lists like this gets
questioned.

Just so this isn't interpreted badly and doesn't start a flame-war, I
will just give up and say that if there was a misunderstanding it was
on my end, and I apologize. I just wanted to respond to your
passive-aggressive attack, since I'm a friendly, helpful person and
don't want to be unfairly labled as "uhhh constructive."


From robert.kern at gmail.com  Wed Aug 22 20:54:15 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 22 Aug 2007 19:54:15 -0500
Subject: What Are These Import/From Statements about?
In-Reply-To: <QD4zi.47346$Um6.28801@newssvr12.news.prodigy.net>
References: <un_yi.34471$2v1.24183@newssvr14.news.prodigy.net>	<mailman.123.1187804723.32294.python-list@python.org>	<qb0zi.47332$Um6.34487@newssvr12.news.prodigy.net>	<mailman.137.1187815545.32294.python-list@python.org>
	<QD4zi.47346$Um6.28801@newssvr12.news.prodigy.net>
Message-ID: <failrn$u3t$1@sea.gmane.org>

W. Watson wrote:
> Thanks very much. Where's the global index?

http://docs.python.org/modindex.html

-- 
Robert Kern

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



From Dominic at PLEASEASK.co.uk  Thu Aug 16 11:30:37 2007
From: Dominic at PLEASEASK.co.uk (special_dragonfly)
Date: Thu, 16 Aug 2007 16:30:37 +0100
Subject: A problem with Time
Message-ID: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>

Hello,

I need to return the date yesterday in the form DDMMYYYY. I looked through 
the modules: time, datetime and calendar but can't find anything that leaps 
out at me.

The problem I'm having is that although I can use time.localtime and get a 
tuple of the year, month, day and so forth, I don't believe I can just minus 
1 from the day, because I don't think it's cyclic, also, I can't see the 
date being linked in with the month.

So is there any way of getting yesterdays date?

Thank You

Dominic 




From cpmishra.20 at gmail.com  Thu Aug  2 05:29:13 2007
From: cpmishra.20 at gmail.com (cpmishra)
Date: Thu, 02 Aug 2007 09:29:13 -0000
Subject: No module named DBUtils.PooledDB
In-Reply-To: <1186036678.623372.221890@w3g2000hsg.googlegroups.com>
References: <1186036678.623372.221890@w3g2000hsg.googlegroups.com>
Message-ID: <1186046953.960315.287240@d55g2000hsg.googlegroups.com>




---------- Forwarded message ----------
From: cpmishra <cpmishra... at gmail.com>
Date: Aug 2, 11:37 am
Subject: No module named DBUtils.PooledDB
To: comp.lang.python


Hi all
       I have used DBUtil with python2.4. when we run to program in
dos command ,successfully run but when we run in apache server
(locally)with modepython then given error.Pls  help me

program:
#import pgdb # import used DB-API 2 module
from DBUtils.PooledDB import PooledDB
import MySQLdb
#from mod_python import util
class Connection:

	def getConnection(self):
		pool = PooledDB(MySQLdb, 20,
db='ratingtool',host="localhost",port=3306, user="xwiki",
passwd="xwiki")
		conn = pool.connection()
		return conn



error:
No module named DBUtils.PooledDB

cp mishra



From http  Sat Aug  4 18:08:40 2007
From: http (Paul Rubin)
Date: 04 Aug 2007 15:08:40 -0700
Subject: Client-side HTML form processing with Python?
References: <1186263839.778333.143200@d30g2000prg.googlegroups.com>
Message-ID: <7xir7vosuv.fsf@ruckus.brouhaha.com>

goldtech <goldtech at worldpost.com> writes:
> I have no client or server side tools like PHP, JAVA. I don't know
> JavaScript. I can not add anything to the workstation I am using. It's
> going to have to be a client-side solution - there's no CGI on the
> server, no PHP.

Oh wait, you're trying to write html on a remote web server that saves
files on the client?  Hmm, what browser?  Anyway you're going to have
to use browser scripting and use browser-dependent mechanisms to get
the user's permission to access the file system.  It is messy but
necessary.  Granting arbitrary file system access to remote web
servers would be a huge security hole.


From vedrandekovic at v-programs.com  Sat Aug 18 09:08:29 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Sat, 18 Aug 2007 06:08:29 -0700
Subject: wxPython with directpython
Message-ID: <1187442509.620003.316770@r34g2000hsd.googlegroups.com>

Hello,

I'am using  DirectPython 0.8, wxPython 2.8.4.2 (ansi) for Python 2.5
and I'm running it on windows XP SP2.
When I run my wx program, and this program run directpython code:

(I run it under wx frame)

example code:

import d3dx
fr=d3dx.Frame(unicode("My frame"))
fr.mainloop()

.....this code run some d3dx frame, and when I close this d3dx frame
it close my whole program ( and wx frame).

Regards,
Vedran



From raims at dot.com  Wed Aug 29 04:53:37 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Wed, 29 Aug 2007 10:53:37 +0200
Subject: Gmane's been quiet ...
References: <mailman.88.1188343014.28954.python-list@python.org>
	<1i3l2k9.1j3tdgr1iz19yeN%raims@dot.com>
	<13d9l0f1i2erdc6@corp.supernews.com>
Message-ID: <1i3lsqu.10ti61g1fs47osN%raims@dot.com>

Grant Edwards <grante at visi.com> wrote:
> Posting that were made to mailing lists via gmane?

That, I do not know

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From xah at xahlee.org  Wed Aug 29 11:47:27 2007
From: xah at xahlee.org (Xah Lee)
Date: Wed, 29 Aug 2007 08:47:27 -0700
Subject: general function for sorting a matrix
Message-ID: <1188402447.290663.307640@z24g2000prh.googlegroups.com>

A couple years ago, i posted a programing problem, about writing a
function that will sort a arbitrarily dimentioned matrix in any
possible way to sort it.

Such a function, is rather typical in functional programing
languages.  I wrote a version in 1999 in perl for practical purposes,
since sorting a matrix (i.e. list of lists) is rather common. With
this function, i can have a single interface to deal with any list
(including list of lists).

It is ideal, that a language's function for sort actually are of this
generality.
(See ?What is Expressiveness in a Computer Language?, Xah Lee, 2005.
http://xahlee.org/perl-python/what_is_expresiveness.html
)

The advantage of such a generality, is that a programer don't need to
write a sorting code every time she encounters a list.

Anyway, so i wrote it in 1999 in perl for practical purposes, and have
used it in industrial coding often.  In 2005, while i was learning
Python, i wrote a python version as a exercise.  Today, i actually
need it again, while coding in python. So i looked at my code and
spruced up the documentation.

Here's the function spec:
----------------

Today we'll write a function that can sort a matrix in all possible
ways. Following is the specification. Take a day to see if you can
write such a function in your favorite language. Perl and Python
solutions are at the end of this page.

sort_matrix( matrix, [[n1, s1, d1], [n2, s2, d2], [n3, s3, d3], ...])
returns a sorted matrix by n1 th column, if tie, then by n2 th
column ... and so on.

The first argument is a list, whose elements are lists of equal
lengths.

s1, s2, s3... are booleans. If True, then the corresponding column are
interpreted as a string and the ordering is lexicographical.

d1, d2, d3... are booleans. If True, the sort for the corresponding
column are ascending.

Example:.

myMatrix =
 [
   [3, 99, 'a'],
   [2, 77, 'a'],
   [1, 77, 'a']
 ];

sort_matrix(myMatrix,[[3,True,True],[2,False,True]])

This means sort by 3th column, regarding it as strings, and in
ascending order. If tie, sort by 2th column, regarding it as number,
in ascending order. It returns:

[[2,77,'a'],
 [1,77,'a'],
 [3,99,'a']]

----------------

While reviewing this code, there's something interesting of note.

Namely, in my perl solution, the approach is drastically different
than the python version. Instead of sorting by looping thru the
sorting directives, it parses the directives then generate the
complete sort code, then eval it in one shot. This is more of a pure
functional approach.

I thought it is of interest.

The Perl and Python solutions are at:
General Function For Matrix Sorting
http://xahlee.org/perl-python/sort_matrix.html

It would be interesting, to see a python version using the approach
i've done in the Perl version, and a Perl version using imperative
approach without using eval().

A solution in lisp (emacs lisp, common lisp, scheme) would be
relatively trivial, similarly for Haskell and Mathematica. In fact, i
think the sort function as specified above are not very useful in
practice in these languages to various degress (depending on the
lang). Because a functional language usually have powerful,
generalized functions and constructs that solve the above in a few
trivial lines that are rather ideomatic to the language.

Nevertheless, it would be interesting to see a solution in the above
languages.

For the languages i'm personally involved, a major difficulty would be
Java. In my opinion, it would be a very difficult (if not impossible)
to construct this sort function Java, C, C++, C#.

  Xah
  xah at xahlee.org
? http://xahlee.org/



From __peter__ at web.de  Tue Aug  7 14:20:01 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 07 Aug 2007 20:20:01 +0200
Subject: distutils
References: <1186489676.042901.236140@w3g2000hsg.googlegroups.com>
	<46b8adc7$0$240$e4fe514c@news.xs4all.nl>
	<1186509757.778884.39230@19g2000hsx.googlegroups.com>
Message-ID: <f9ad4k$b9t$03$1@news.t-online.com>

 vedrandekovic at v-programs.com wrote:

> On 7 kol, 19:37, Irmen de Jong <irmen.NOS... at xs4all.nl> wrote:

>> Are you sure you haven't written a module yourself called distutils.py ?
>> (that one will hide the standard distutils module)

> I was search for all distutils files and folders and I'am sure there
> is no distutils except "c:\Python24\Lib\distutils"

What does

>>> import distutils
>>> distutils.__file__
'/usr/lib/python2.5/distutils/__init__.pyc'

print on your machine?

Peter



From robert.kern at gmail.com  Thu Aug 30 15:44:19 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 30 Aug 2007 14:44:19 -0500
Subject: subclassing Python types
In-Reply-To: <1188501865.541186.272290@e9g2000prf.googlegroups.com>
References: <1188500442.434722.157350@q5g2000prf.googlegroups.com>	<46d717f5$0$30367$9b4e6d93@newsspool4.arcor-online.net>
	<1188501865.541186.272290@e9g2000prf.googlegroups.com>
Message-ID: <fb76mp$dgu$1@sea.gmane.org>

zzbbaadd at aol.com wrote:

> So it's:
> class MyString(str):
>    def __init__(self,strInput):
>       self = strInput

That doesn't quite work. Assigning to "self" only reassigns the name inside the
function. It does not replace the object.

Instead, call the .__init__() method on str.

class MyString(str):
    def __init__(self, strInput):
        str.__init__(self, strInput)
        # ... other stuff

-- 
Robert Kern

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



From steve at holdenweb.com  Wed Aug 29 17:35:52 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 29 Aug 2007 17:35:52 -0400
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>	<1188364909.397692.209170@q4g2000prc.googlegroups.com>	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
Message-ID: <fb4orl$1p7$1@sea.gmane.org>

Chris Mellon wrote:
> On 8/29/07, Russ <uymqlp502 at sneakemail.com> wrote:
[...]
>> If you are
>> programming something that doesn't really need to be correct, than you
>> probably don't need it. But if you really need (or want) your software
>> to be correct and reliable as possible, I think you you should be
>> interested in it. You might want to read this:
>>
> 
> You don't want your software to KILL BABIES, do you? If you don't want
> your programs to KILL BABIES then you should use our technique, so you
> don't KILL BABIES.
> 
> There are ways to make correct programs besides DBC. It may not even
> help in the general case - just as with unit testing and type proving,
> you're going to be limited by what you don't think to assert or
> document or test, and I've seen no evidence that DBC is any better
> than anything else at preventing unwritten assumptions.

Personally I have found the best strategy to be KWYD: know what you're 
doing. Your assertion that success of DBC relies on the competence of 
the practitioner is indeed true, just as it is for all other 
methodologies. The number of programmers who *don't* know what they are 
doing and yet manage to find well-paid employment in mission-critical 
system implementation is truly staggering.

If I can blow my own trumpet briefly, two customers (each using over 25 
kLOC I have delivered over the years) ran for two years while I was away 
in the UK without having to make a single support call. One of the 
systems was actually locked in a cupboard all that time (though I have 
since advised that client to at least apply OS patches to bring it up to 
date).

This was achieved by defensive programming, understanding the user 
requirements and just generally knowing what I was doing. Nevertheless I 
would hesitate to write code for such demanding areas as real-time 
rocket flight control, because I just don't think I'm that good. Very 
few people are, and learning as you go can be disastrously expensive 
when military and space projects are involved.

But it's always a good idea to make your software "correct and as 
reliable as possible", isn't it? The problem is the external constraints 
on the project. As the old saying goes: "Cheap, fast, reliable: choose 
any two".

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From brianc at temple.edu  Thu Aug  9 16:56:12 2007
From: brianc at temple.edu (Brian Cole)
Date: Thu, 9 Aug 2007 14:56:12 -0600
Subject: Gotcha I never ran into before
Message-ID: <54b165660708091356w5231997fofbc62b5d10b96b44@mail.gmail.com>

I've been programming in Python for about 6 years now. One of the
features I adore the most is the very useful error messages and stack
traces that make it easy to debug. However, today I ran into a
difficult to trace bug because the stack trace was reporting the
problem in the wrong place.

class Delegator(object):
    def __init__(self, obj):
        self.obj = obj
    def __getattr__(self, attr):
        return getattr(self.obj, attr)

class SpecializedDelegator(Delegator):
    def get_blah(self):
        return ["Returning Blah"].upper()
    blah = property(fget=get_blah)

print SpecializedDelegator("Doesn't Matter").blah

The stack trace is:
Traceback (most recent call last):
  File "test.py", line 12, in ?
    print SpecializedDelegator("Doesn't Matter").blah
  File "test.py", line 5, in __getattr__
    return getattr(self.obj, attr)
AttributeError: 'str' object has no attribute 'blah'

Which is correct, but says nothing about the real problem inside the
get_blah method. Is there a good reason that when a property's fget
function throws an AttributeError that it should fall back on
__getattr__? I would think since the attribute was explicitly defined
as a property the property function should be allowed to fully crash
and burn.

Note: This example is broken up into two classes because that is how I
discovered it. Since both classes were in separate files it added to
the agony of debugging this. Luckily I was making a small incremental
change so I could just back up and figure out what went wrong.

Thanks,
Brian


From inq1ltd at inqvista.com  Sat Aug  4 15:36:07 2007
From: inq1ltd at inqvista.com (jim-on-linux)
Date: Sat, 04 Aug 2007 15:36:07 -0400
Subject: sqlite3 create table col width?
In-Reply-To: <1186250745.3385.23.camel@dot.uniqsys.com>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<200708041351.10507.inq1ltd@inqvista.com>
	<1186250745.3385.23.camel@dot.uniqsys.com>
Message-ID: <200708041536.07735.inq1ltd@inqvista.com>

On Saturday 04 August 2007 14:05, Carsten Haese 
wrote:
> On Sat, 2007-08-04 at 13:51 -0400, jim-on-linux 
wrote:
> > PY help,
> >
> > Using sqlite3 v3.1.3
> >
> > When I create a table collumn using;
> >
> > newcollum VARCHAR(35),
> >
> > I get a default of 10 spaces.
> >
> > No matter what I set the size to I get 10
> > spqces, even using varchar(0) defaults to 10
> > spaces.
> >
> > I would appreciae the help if someone could
> > tell me what I'm missing, I want to varry the
> > column sizes.
>
> What you're missing is that sqlite columns are
> type-less. Column type
>
> and size are irrelevant:
> >>> import sqlite3
> >>> conn = sqlite3.connect(":memory")
> >>> cur = conn.cursor()
> >>> cur.execute("create table t1 (c1
> >>> varchar(35))")
>
> <sqlite3.Cursor object at 0xb7f6dbf0>
>
> >>> cur.executemany("insert into t1(c1)
> >>> values(?)",
>
> ...     [ ("X"*i*10,) for i in range(10) ] )
>
> >>> cur.execute("select * from t1")
>
> <sqlite3.Cursor object at 0xb7f6dbf0>
>
> >>> for row in cur: print row
>
> ...
> (u'',)
> (u'XXXXXXXXXX',)
> (u'XXXXXXXXXXXXXXXXXXXX',)
> (u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',)
> (u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',)
> (u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>XXXXXX',)
> (u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>XXXXXXXXXXXXXXXX',)
> (u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>XXXXXXXXXXXXXXXXXXXXXXXXXX',)
> (u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',)
> (u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',
>)
>
> Even though the column was created to be 35
> characters wide, it'll happily accept
> 100-character strings.
>
> HTH,
>
> --
> Carsten Haese
> http://informixdb.sourceforge.net


Right, the data is there. 
My question is framed wrong.  Your answer pointed 
out the flaw in the question.

Since I'm on linux, the database can be opened 
with Knoda.  Once opened the table collumns are 
always 10 spaces so all the data is not readable 
as presented.  Not quite a python problem.  

I can Tk a display for the data, just thought I 
could save time by letting the user open the 
table and read the data right from the table.

Thanks for the help.

jim-on-linux

 






















From musiccomposition at gmail.com  Wed Aug 22 22:13:57 2007
From: musiccomposition at gmail.com (Benjamin)
Date: Thu, 23 Aug 2007 02:13:57 -0000
Subject: The folder a script is executed in
In-Reply-To: <1187709831.722991.99490@l22g2000prc.googlegroups.com>
References: <1187687436.476773.276550@22g2000hsm.googlegroups.com>
	<1187709831.722991.99490@l22g2000prc.googlegroups.com>
Message-ID: <1187835237.599348.91960@q3g2000prf.googlegroups.com>

On Aug 21, 10:23 am, Benjamin <musiccomposit... at gmail.com> wrote:
> On Aug 21, 4:10 am, aine_ca... at yahoo.com wrote:> Hi,
>
> > How do I find out what folder a script is in while it is executing?
>
> > For example, for the file "C:/folder/script.py" contain the following
> > two lines of code -
>
> > myLocation = GetMyLocation()
> > print myLocation
>
> def GetMyLocation():
>     runningFile = sys.argv[0] if __name__ == "__main__" else __file__
>     return os.path.dirname(runningFile)
never mind that above
def GetMyLocation():
    if __name__ == "__main__":
         runningFile = sys.argv[0] if os.path.isabs(sys.argv[0]) else
os.path.abs(sys.argv[0])
    else:
         runningFile = __file__
    return runningFile


>
>
>
> > >> C:/folder
>
> > Thanks,
>
> > Aine.




From pyscottishguy at hotmail.com  Wed Aug 15 08:57:39 2007
From: pyscottishguy at hotmail.com (pyscottishguy at hotmail.com)
Date: Wed, 15 Aug 2007 05:57:39 -0700
Subject: creating and appending to a dictionary of a list of lists
In-Reply-To: <1187176133.986004.213880@a39g2000hsc.googlegroups.com>
References: <1187145044.394889.312590@x35g2000prf.googlegroups.com>
	<1187176133.986004.213880@a39g2000hsc.googlegroups.com>
Message-ID: <1187182659.660008.230220@k79g2000hse.googlegroups.com>

On Aug 15, 8:08 am, Ant <ant... at gmail.com> wrote:
> On Aug 15, 3:30 am, pyscottish... at hotmail.com wrote:
>
> > Hey,
>
> > I started with this:
>
> > factByClass = {}
>
> ...
> > def update(key, *args):
> >     x = factByClass.setdefault(key, [[], [], [], [] ])
> >     for i, v in enumerate(args):
> >         x[i].append(v)
>
> > Is there a better way?
>
> Well, the following is perhaps neater:
>
> >>> factByClass = defaultdict(lambda: [[],[],[],[]])
> >>> def update(key, *args):
>
> ...   map(list.append, factByClass[key], args)
> ...>>> update('one', 1, 2, 3, 4)
> >>> update('one', 5, 6, 7, 8)
> >>> update('two', 9, 10, 11, 12)
>
> >>> print factByClass
>
> defaultdict(<function <lambda> at 0x00F73430>, {'two': [[9], [1
> 0], [11], [12]], 'one': [[1, 5], [2, 6], [3, 7], [4, 8]]})
>
> It abuses the fact that list.append modifies the list in place -
> normally you would use map to get a new list object. In this case the
> new list returned by map is just a list of None's (since append
> returns None - a common idiom for functions that operate by side
> effect), and so is not used directly.
>
> --
> Ant...
>
> http://antroy.blogspot.com/

Nice.  I like it.  Thanks a lot!



From robert.kern at gmail.com  Sat Aug  4 01:29:17 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 04 Aug 2007 00:29:17 -0500
Subject: bias in random.normalvariate??
In-Reply-To: <1186198720.800007.38800@k79g2000hse.googlegroups.com>
References: <1186198720.800007.38800@k79g2000hse.googlegroups.com>
Message-ID: <f912rl$50u$1@sea.gmane.org>

drewlist at gmail.com wrote:
> I'm a Python newbie and certainly no expert on statistics, but my wife
> was taking a statistics course this summer and to illustrate that
> sampling random numbers from a distribution and taking an average of
> the samples gives you a random number as the result (bigger sample ->
> smaller variance in the calculated random number, converging in on the
> mean of the original distribution), I threw together this program:
> 
> #! /usr/bin/python
> 
> import random;
> 
> i=1
> samplen=100
> mean=130
> lo=mean
> hi=mean
> sd=10
> sum=0
> while(i<=samplen):
> 	x=random.normalvariate(mean,sd)
> 	#print x
> 	if x<lo: lo=x
> 	if x>hi: high=x
> 	sum+=x
> 	i+=1
> print 'sample mean=', sum/samplen, '\n'
> print 'low value =', lo
> print 'high value=', high

Your code has an error. In the middle of your code, you changed "hi" to "high".

-- 
Robert Kern

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



From wildemar at freakmail.de  Fri Aug 24 07:34:49 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Fri, 24 Aug 2007 13:34:49 +0200
Subject: Co-developers wanted: document markup language
In-Reply-To: <1187953231.106631.174870@q4g2000prc.googlegroups.com>
References: <87odgyyx9u.fsf@wilson.homeunix.com>	<fakrtb$2ts$1@panix3.panix.com>	<87tzqpew22.fsf@wilson.homeunix.com>	<fal3cv$bi2$1@panix3.panix.com>	<87tzqp77my.fsf@wilson.homeunix.com>	<7xy7g1if24.fsf@ruckus.brouhaha.com>	<87mywh717i.fsf@wilson.homeunix.com>	<1187947900.676122.144490@e9g2000prf.googlegroups.com>	<87absh6wn6.fsf@wilson.homeunix.com>
	<1187953231.106631.174870@q4g2000prc.googlegroups.com>
Message-ID: <46CEC259.3090300@freakmail.de>

olive wrote:
> What you need is good structured text editor which hides as much as
> possible the underlying XML (or other) format.
>   
What you do there is pose extra requirements on the user ("Use a text 
editor with some far-out functions"). That will prevent your (well, 
Torsten's ;)) standard from spreading easily. Plain text (read: less 
intrusive) markup is a way better approach there, IMHO, because it can 
be done in any old editor.

/W


From arnodel at googlemail.com  Thu Aug 30 15:42:44 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 30 Aug 2007 19:42:44 -0000
Subject: subclassing Python types
In-Reply-To: <1188501865.541186.272290@e9g2000prf.googlegroups.com>
References: <1188500442.434722.157350@q5g2000prf.googlegroups.com>
	<46d717f5$0$30367$9b4e6d93@newsspool4.arcor-online.net>
	<1188501865.541186.272290@e9g2000prf.googlegroups.com>
Message-ID: <1188502964.572795.89030@r23g2000prd.googlegroups.com>

On Aug 30, 8:24 pm, zzbba... at aol.com wrote:
> On Aug 30, 12:18 pm, Wildemar Wildenburger
>
>
>
> <lasses_w... at klapptsowieso.net> wrote:
> > zzbba... at aol.com wrote:
> > > I have read that you can derive from the base classes such as str,
> > > list, dict.
>
> > > I guess this would look like:
>
> > > def MyString(str):
> > > def MyList(list):
> > > def MyDict(dict):
>
> > Well, replace 'def' with 'class' and you're right.
>
> > > How do you access the data that is contained in the super class?
>
> > This way:
> >  >>> class MyList(list):
> > ...    def do_something(self):
> > ...       self.append(3)
> > ...       print self
> > ...
> >  >>> l = MyList((1, 2))
> >  >>> l
> > [1, 2]
> >  >>> l.do_something()
> > [1, 2, 3]
>
> > That is: Whenever you want to refer to the value refer to self (that is,
> > refer to the instance of your class).
>
> > /W
>
> Ok, thanks.
>
> So it's:
> class MyString(str):
>    def __init__(self,strInput):
>       self = strInput

No. Well in this case it seems to work as the method str.__new__ is
called first which does what you intend to do in your example. But try
this:

>>> class Upper(str):
...     def __init__(self, s):
...             self = s.upper()
...
>>> Upper('camelot')
'camelot'

Doesn't work (should be 'CAMELOT', shouldn't it?)!
To understand why it doesn't behave as you expect, and how to achieve
what you want,  see "Overriding the __new__ method" in GvR's article
"Unifying types and classes in Python 2.2" (http://www.python.org/
download/releases/2.2.3/descrintro/#__new__).

HTH

--
Arnaud




From danmcleran at yahoo.com  Wed Aug  8 12:37:47 2007
From: danmcleran at yahoo.com (danmcleran at yahoo.com)
Date: Wed, 08 Aug 2007 09:37:47 -0700
Subject: 'Advanced' list comprehension? query
In-Reply-To: <1186588812.006107.185570@o61g2000hsh.googlegroups.com>
References: <1186588812.006107.185570@o61g2000hsh.googlegroups.com>
Message-ID: <1186591067.016051.132700@i38g2000prf.googlegroups.com>

On Aug 8, 10:00 am, pyscottish... at hotmail.com wrote:
> Hi,
>
> I'm playing around with list comprehension, and I'm trying to find the
> most aesthetic way to do the following:
>
> I have two lists:
>
> noShowList = ['one', 'two', 'three']
>
> myList = ['item one', 'item four', 'three item']
>
> I want to show all the items from 'myList' that do not contain any of
> the strings in 'noShowList'.
>
> i.e. 'item four'
>
> I can do it like this:
>
> def inItem(noShowList, listitem):
>     return [x for x in noShowList if x in listitem]
>
> print [x for x in myList if not inItem(noShowList, x)]
>
> and I can do it (horribly) with:
>
> print [x for x in myList if not (lambda y, z:[i for i in y if i in z])
> (noShowList, x)]
>
> I can also print out the items that DO contain the 'noShowList'
> strings with:
>
> print [x for x in myList for y in noShowList if y in x]
>
> but I can't get the 'not' bit to work in the above line.
>
> Any ideas?
> Thanks!

import itertools

from itertools import ifilter

noShowList = ['one', 'two', 'three']
myList = ['item one', 'item four', 'three item']

result = list(ifilter(lambda x: True not in [item in x for item in
noShowList], myList))

print result

>>>['item four']



From goldtech at worldpost.com  Fri Aug 31 23:00:52 2007
From: goldtech at worldpost.com (goldtech)
Date: Fri, 31 Aug 2007 20:00:52 -0700
Subject: Parameter Passing - String Variable Truncated ?
In-Reply-To: <1188610604.701171.287210@e9g2000prf.googlegroups.com>
References: <1188604442.700651.94530@19g2000hsx.googlegroups.com>
	<1188610604.701171.287210@e9g2000prf.googlegroups.com>
Message-ID: <1188615652.384380.318230@k79g2000hse.googlegroups.com>

snip...
> > --------------------------
>
> Try handle.write(repr(sys.argv[1:]) + "\n")
> and come back with your conclusions ... unless of course someone has
> spoonfed you in the meantime.
>
> Another clue: write yourself a little arg-dumper script and try
> running it in a Command Prompt window.
> 8<---
> import sys
> for x, arg in enumerate(sys.argv):
>     print x, repr(arg)
> 8<---
> HTH,
> John

It's a list.

...
['5', ':', 'Alaska.shp']
['6', ':', 'Arizona.shp']
['7', ':', 'Arkansas.shp']
['8', ':', 'California.shp']
['9', ':', 'Colorado.shp']
['10', ':', 'Connecticut.shp']
['11', ':', 'Delaware.shp']
['12', ':', 'District', 'of', 'Columbia.shp']
['13', ':', 'Florida.shp']
['14', ':', 'West', 'Virginia.shp']
['15', ':', 'Wisconsin.shp']
['16', ':', 'Wyoming.shp']

Thanks,
Lee G.



From tjreedy at udel.edu  Fri Aug 17 13:46:44 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 17 Aug 2007 13:46:44 -0400
Subject: Memory leak when creating lots of object
References: <1187067442.084074.55010@z24g2000prh.googlegroups.com><1187190827.395382.85740@57g2000hsv.googlegroups.com>
	<1187322688.545415.122010@i38g2000prf.googlegroups.com>
Message-ID: <fa4mvc$9eb$1@sea.gmane.org>


"Godzilla" <godzillaismad at gmail.com> wrote in message 
news:1187322688.545415.122010 at i38g2000prf.googlegroups.com...
| What should I do next? Can I force garbage collection manually? If so,
| how do I do that?

Read doc for gc module.  I think
import gc
gc.collect()





From zyzhu2000 at gmail.com  Sat Aug 18 20:31:36 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Sun, 19 Aug 2007 00:31:36 -0000
Subject: Parser Generator?
In-Reply-To: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
Message-ID: <1187483496.805767.222400@i38g2000prf.googlegroups.com>

On Aug 18, 5:22 pm, "Jack" <nos... at invalid.com> wrote:
> Hi all, I need to do syntax parsing of simple naturual languages,
> for example, "weather of London" or "what is the time", simple
> things like these, with Unicode support in the syntax.
>
> In Java, there are JavaCC, Antlr, etc. I wonder what people use
> in Python? Antlr also has Python support but I'm not sure how good
> it is. Comments/hints are welcome.

Antlr seems to be able to generate python code, too.



From thattommyhall at gmail.com  Tue Aug 14 18:05:17 2007
From: thattommyhall at gmail.com (thattommyhallll@gmail.com)
Date: Tue, 14 Aug 2007 22:05:17 -0000
Subject: A dumb question about a class
In-Reply-To: <tvKdnY5tf7bSXyLbnZ2dnUVZ_rCtnZ2d@comcast.com>
References: <mailman.1887.1186955369.22759.python-list@python.org>
	<TqSdnWYzVdWvGCLbnZ2dnUVZ_saknZ2d@comcast.com>
	<mailman.1888.1186957809.22759.python-list@python.org>
	<euCdnYM4sfSHFiLbnZ2dnUVZ_gadnZ2d@comcast.com>
	<mailman.1891.1186963290.22759.python-list@python.org>
	<tvKdnY5tf7bSXyLbnZ2dnUVZ_rCtnZ2d@comcast.com>
Message-ID: <1187129117.868507.151980@d55g2000hsg.googlegroups.com>

On Aug 13, 3:30 am, Steven Bethard <steven.beth... at gmail.com> wrote:
> Dick Moores wrote:
> > At 03:35 PM 8/12/2007, Steven Bethard wrote:
> >> Note that if you just want to iterate over all the primes, there's no
> >> need for the class at all.  Simply write::
>
> >>      forprimein iter_primes():
>
> > Even if I want to test only 1 integer, or want the list of primes in a
> > certain interval, I don't need the class at all
>
> Yep.  That was the basis of my original feeling that the recipe was
> kinda overkill.
>
> > Thanks for your help. I didn't learn much about classes, but appreciated
> > your iter_primes() a lot!
>
> You're welcome, though I can't actually take credit for iter_primes().
> The original version is due to Tim Hochberg, in a comment on this recipe:
>
>      http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/117119
>
> FWIW, he says that he "managed to generate all primes up to 909,691
> before it bombed the Python interpreter mysteriously, but it takes a while!"
>
> I'm not particularly married to thatprimegenerator. For your purposes,
> any generator version of iter_primes() is probably more useful than the
> class you were looking at. You can see some other implementations ofprimegenerators on that same recipe page.
>
> STeVe

I wrote that recipe, did not realise anyone was using it (I forgot to
update it with the version I now use)
I thought any prime generator is not a good idea for the following
reasons:
   You end up carrying around a list of primes anyway,
   It is not faster than the Sieve of Eratosthenes

Here is the latest version (following Steves lead doing __contains__ ,
thanks Steve)
(I held off doing this as I had not properly implemented _isprime , it
returned incorrect values if you asked it about very big numbers, now
it will bruteforce an answer)

It is slower than Steves unless you use Psyco, then its two times as
fast.
I was surprised as I had used generators and had slower time, but was
unfamiliar with ifilter (but will be playing with it soon) - that may
give the speedup

Also, does anyone know if there is some magic that makes
i in some_set
loads faster than
i in some_list
as if I tweek Steves to use a list instead, it slows down loads.

All the very best,
Tom

PS: I am about to go to bed, but will post the tests I used etc to my
blog tomorrow.


"""

class PrimeList:
	def __init__(self, initial=0):
		self.primelist = [2]
		self.primelookup = [0,0,1,1]
		self.max_prime = 2
		self.initialise_list(initial)

	def initialise_list(self,upto):
		"Good old Sieve of Eratosthenes"
		if upto <= 3:
			pass
		self.primelookup.extend([0,1] * ((upto-3)//2))
		if upto % 2 == 0:
			self.primelookup.extend([0])
		for i in range(3, upto + 1 , 2):
			if self.primelookup[i]:
				self.primelist.append(i)
				self.max_prime = i
				j = i + i
				while j <= upto:
					self.primelookup[j] = 0
					j += i

	def __contains__(self,number):
		if number < 2:
			return False
		if number > self.max_prime - 1:
			#print "Asking for what I dont have!"
			return self._isprime(number)
		return self.primelookup[number]

	def _isprime(self, number):
		for prime in self.primelist:
			if prime > number ** .5:
				break
			if number % prime == 0:
				return False
		if number < self.max_prime ** 2:
			return True
		else:
			#Brute forcing
			for i in range(self.max_prime,number ** .5 + 1, 2):
				if number % i == 0:
					return False
			return True


"""




From deets at nospam.web.de  Mon Aug 13 09:14:12 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 13 Aug 2007 15:14:12 +0200
Subject: retrieving ATOM/FSS feeds
References: <f9oecg$249v$1@sxnews1.qg.com>
	<1i2s7c9.13bkwbfsd3mbqN%raims@dot.com>
	<f9p9vr$2bb7$1@sxnews1.qg.com>
Message-ID: <5ib3p4F3nd1m4U1@mid.uni-berlin.de>

_spitFIRE wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Lawrence Oluyede wrote:
>> If the content producer doesn't provide the full article via RSS/ATOM
>> there's no way you can get it from there. Search for full content feeds
>> if any, otherwise get the article URL and feed it to BeautifulSoup to
>> scrape the content.
>> 
> 
> For the same feed (where the content producer doesn't provide the full
> article!) I was able to see the complete post in other RSS aggregators
> (like Blam). I wanted to know how they were able to collect the feed!

Either it is referred to in the data - or it might be that they do have
affiliate-deals with certain partners.

Diez


From aleax at mac.com  Fri Aug 17 01:39:21 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 16 Aug 2007 22:39:21 -0700
Subject: using super() to call two parent classes __init__() method
References: <1187328619.039289.244900@g4g2000hsf.googlegroups.com>
Message-ID: <1i2ymw2.1g2azih1htljbzN%aleax@mac.com>

7stud <bbxx789_05ss at yahoo.com> wrote:

> When I run the following code and call super() in the Base class's
> __init__ () method,  only one Parent's __init__() method is called.
> 
> 
> class Parent1(object):
>     def __init__(self):
>         print "Parent1 init called."
>         self.x = 10
> 
> class Parent2(object):
>     def __init__(self):
>         print "Parent2 init called."
>         self.y = 15
> 
> class Base(Parent1, Parent2):
>     def __init__(self):
>         super(Base, self).__init__()
>         self.z = 20
> 
> b = Base()
> 
> --output:--
> Parent1 init called.

Yep -- Parent1.__init__ doesn't call its own super's __init__, so it
doesn't participate in cooperative superclass delegation and "the buck
stops there".


Alex


From markacy at gmail.com  Sat Aug 18 05:02:02 2007
From: markacy at gmail.com (markacy)
Date: Sat, 18 Aug 2007 09:02:02 -0000
Subject: Getting the result of a process after exec*()
In-Reply-To: <1187361196.184025.234020@k79g2000hse.googlegroups.com>
References: <1187361196.184025.234020@k79g2000hse.googlegroups.com>
Message-ID: <1187427722.577848.184310@g4g2000hsf.googlegroups.com>

On 17 Sie, 16:33, AndrewTK <atkedzier... at gmail.com> wrote:
> Hi,
>
> I am trying to write a Python script that takes a ZIP file from a web
> form (using CGI) and uses either of the UN*X unzip, gunzip, tar,
> bunzip2 utilities to expand it.
>
> I can use Python to save the script to disk; but processing it is
> another matter. If for example I have received a *.tar.gz file, I need
> to first pass it through gunzip; then through the tar utility. I also
> want to process the resulting directory.
>
> The problem for me is this: once an external process is called via
> exec*() the script has effectively fulfilled its task. Is there any
> way one can process a file with an external process and continue
> further processing in Python; /once the external processing is
> completed/?
>
> Many thanks,
>
> Andrew

Hi Andrew,

Have You got some kind of requirement for using exec*() and calling
system gunzip etc?
I'd do It with urllib2 module (to download the file) and tarfile
module for extracting the *.tag.gz archive.

Cheers,
Marek



From laurent.pointal at laposte.net  Tue Aug  7 13:34:31 2007
From: laurent.pointal at laposte.net (Laurent Pointal)
Date: Tue, 7 Aug 2007 19:34:31 +0200
Subject: Release of Pmw.1.3
In-Reply-To: <FB83EDFE3634334EA76600378DC61F69C58A9C@CPEXBE-EML20.kpnsp.local>
References: <FB83EDFE3634334EA76600378DC61F69C58A9C@CPEXBE-EML20.kpnsp.local>
Message-ID: <200708071934.31535.laurent.pointal@laposte.net>

Two problems when trying setup.py installation:

* archive unzip into a ./src/Pmw directory - IMHO src is not a good name.
* setup.py install failed:
[root at litchi src]# gunzip -c /home/laurent/nobackup/download/Pmw.1.3.tar.gz | 
tar -xv
<many ./src/Pmw/xxx files>
[root at litchi src]# cd src
[root at litchi src]# python setup.py install
running install
running build
running build_py
package init file '__init__.py' not found (or not a regular file)
error: package directory 'Pmw_1_3' does not exist


I tried going one level deeper and doing:
[root at litchi Pmw]# python ../setup.py install

There were many creating/copying messages, with few errors - see the full 
console output copy at end of the email.


A+, thanks for your Pmw work

Laurent.

[root at litchi Pmw]# python ../setup.py install
running install
running build
running build_py
creating build
creating build/lib
creating build/lib/Pmw
copying __init__.py -> build/lib/Pmw
creating build/lib/Pmw/Pmw_1_3
copying Pmw_1_3/__init__.py -> build/lib/Pmw/Pmw_1_3
package init file 'Pmw_1_3/bin/__init__.py' not found (or not a regular file)
creating build/lib/Pmw/Pmw_1_3/bin
copying Pmw_1_3/bin/bundlepmw.py -> build/lib/Pmw/Pmw_1_3/bin
package init file 'Pmw_1_3/contrib/__init__.py' not found (or not a regular 
file)
creating build/lib/Pmw/Pmw_1_3/contrib
copying Pmw_1_3/contrib/DirBrowser.py -> build/lib/Pmw/Pmw_1_3/contrib
copying Pmw_1_3/contrib/MCListbox.py -> build/lib/Pmw/Pmw_1_3/contrib
copying Pmw_1_3/contrib/PmwFileDialog.py -> build/lib/Pmw/Pmw_1_3/contrib
copying Pmw_1_3/contrib/PmwFullTimeCounter.py -> build/lib/Pmw/Pmw_1_3/contrib
copying Pmw_1_3/contrib/PmwVerticalGauge.py -> build/lib/Pmw/Pmw_1_3/contrib
copying Pmw_1_3/contrib/TreeBrowser.py -> build/lib/Pmw/Pmw_1_3/contrib
package init file 'Pmw_1_3/demos/__init__.py' not found (or not a regular 
file)
creating build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/AboutDialog.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/All.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/Args.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/Balloon.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/BltGraph.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/BltTabset.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/ButtonBox.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/Colors.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/ComboBox.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/ComboBoxDialog.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/ConfigClass.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/Counter.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/CounterDialog.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/DemoVersion.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/Dialog.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/EntryField.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/ErrorHandling.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/ExampleDemo.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/Grid.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/Group.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/HistoryText.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/LabeledWidget.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/LogicalFont.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/MainMenuBar.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/MenuBar.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/MessageBar.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/MessageDialog.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/MessageInfo.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/MultiLineLabel.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/NestedDialogs.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/NoteBook.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/NoteBook_2.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/NoteBook_3.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/OptionMenu.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/PanedWidget.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/PanedWidget_2.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/PromptDialog.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/RadioSelect.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/Resources.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/Resources_Pmw.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/ScrolledCanvas.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/ScrolledField.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/ScrolledFrame.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/ScrolledListBox.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/ScrolledText.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/ScrolledText_2.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/SelectionDialog.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/ShowBusy.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/SpecialCounter.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/SpecialEntry.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/Spectrum.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/SpeedTest.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/SubClassing.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/TextDialog.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/TextDisplay.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/TimeCounter.py -> build/lib/Pmw/Pmw_1_3/demos
copying Pmw_1_3/demos/WidgetDestroy.py -> build/lib/Pmw/Pmw_1_3/demos
package init file 'Pmw_1_3/doc/__init__.py' not found (or not a regular file)
creating build/lib/Pmw/Pmw_1_3/doc
copying Pmw_1_3/doc/example.py -> build/lib/Pmw/Pmw_1_3/doc
copying Pmw_1_3/doc/exercises.py -> build/lib/Pmw/Pmw_1_3/doc
copying Pmw_1_3/doc/ExampleDemo.py -> build/lib/Pmw/Pmw_1_3/doc
copying Pmw_1_3/doc/ScrolledText_test.py -> build/lib/Pmw/Pmw_1_3/doc
creating build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwBase.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwAboutDialog.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwBalloon.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwBlt.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwButtonBox.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwColor.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwComboBox.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwComboBoxDialog.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwCounter.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwCounterDialog.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwDialog.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwEntryField.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwGroup.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwHistoryText.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwLabeledWidget.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwLoader.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwLogicalFont.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwMainMenuBar.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwMenuBar.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwMessageBar.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwMessageDialog.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwNoteBook.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwOptionMenu.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwPanedWidget.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwPromptDialog.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwRadioSelect.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwScrolledCanvas.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwScrolledField.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwScrolledFrame.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwScrolledListBox.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwScrolledText.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwSelectionDialog.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwTextDialog.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwTimeCounter.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/PmwTimeFuncs.py -> build/lib/Pmw/Pmw_1_3/lib
copying Pmw_1_3/lib/__init__.py -> build/lib/Pmw/Pmw_1_3/lib
package init file 'Pmw_1_3/tests/__init__.py' not found (or not a regular 
file)
creating build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/AboutDialog_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/All.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/Blt_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/ButtonBox_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/Colors_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/ComboBox_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/CounterDialog_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/Counter_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/Dialog_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/EntryField_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/LabeledWidget_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/ManualTests.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/MegaWidget_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/MessageDialog_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/NoteBook_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/OptionMenu_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/Options_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/PanedWidget_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/PmwBase_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/PromptDialog_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/RadioSelect_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/ScrolledCanvas_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/ScrolledField_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/ScrolledFrame_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/ScrolledListBox_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/ScrolledText_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/SelectionDialog_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/Test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/TestVersion.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/TextDialog_test.py -> build/lib/Pmw/Pmw_1_3/tests
copying Pmw_1_3/tests/Tkinter_test.py -> build/lib/Pmw/Pmw_1_3/tests
creating build/lib/Pmw/mw_1_3
creating build/lib/Pmw/mw_1_3/lib
error: can't copy 'mw_1_3/lib/Pmw.def': doesn't exist or not a regular file



-- 
Laurent Pointal
laurent.pointal at laposte.net



From beema.shafreen at gmail.com  Wed Aug  1 23:57:04 2007
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Thu, 2 Aug 2007 09:27:04 +0530
Subject: beginner in python
Message-ID: <aa405c1f0708012057m62929954jf188871b808ebb06@mail.gmail.com>

Hi everybody ,
      I am a beginner in python,
         I have to fetch the redundant entries from a file,

code:

import re
L = []
fh = open('ARCHITECTURE_MAIN.txt','r')
for line in fh.readlines():
        data =line.strip()
#       splitted = data.split('#')
        L.append(data)
fh.close()


M=L
for x in L:
        x = x.split('#')
        for y in M:
            y = y.split('#')
        x_data = x[0],x[1],x[2],x[3]
        #print x_data
        y_data = y[0],y[1],y[2],y[3]
        #print y_dat
        if x_data[0] == y_data[0]:
              print x_data


i get the result as a tupule,
the text file which has datas separated by hash
entry#isoform#start#stop#  i have to check upto this

00250_1#ARCH_104#61#89#Literature#9224948#00250####
00250_1#ARCH_104#97#126#Literature#9224948#00250####
00250_1#ARCH_104#139#186#Literature#9224948#00250####
00251_1#ARCH_463#7#59#SMART##00251####
00251_1#ARCH_463#91#121#SMART##00251####
00251_1#ARCH_463#251#414#SMART##00251####
00251_1#ARCH_463#540#624#SMART##00251####
00252_1#ARCH_474#1#21#Literature#8136357#00252####
00252_1#ARCH_393#481#501#Literature#8136357#00252####
00252_1#ARCH_463#523#553#SMART##00252####
00253_1#ARCH_82#37#362#SMART##00253####
00253_1#ARCH_54#365#522#SMART##00253####
00253_1#ARCH_104#589#617#SMART##00253####
00253_1#ARCH_104#619#647#SMART##00253####
00253_1#ARCH_104#684#712#SMART##00253####
00254_1#ARCH_82#27#352#SMART##00254####
00254_1#ARCH_54#355#510#SMART##00254####
00254_1#ARCH_104#576#604#SMART##00254####
00254_1#ARCH_104#606#634#SMART##00254####
00254_1#ARCH_104#671#699#SMART##00254####
00255_1#ARCH_82#56#425#SMART##00255####
00255_1#ARCH_54#428#582#SMART##00255####
00255_1#ARCH_104#696#724#SMART##00255####




can you suggest me ,what are the improvement i have to make in the above
code
regards
shafreen
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From davmillar at gmail.com  Mon Aug 20 08:59:50 2007
From: davmillar at gmail.com (Dave)
Date: Mon, 20 Aug 2007 12:59:50 -0000
Subject: Public Telnet Server?
In-Reply-To: <slrnfbuirp.52s.grahn+nntp@frailea.sa.invalid>
References: <1186844845.304731.18300@x40g2000prg.googlegroups.com>
	<slrnfbuirp.52s.grahn+nntp@frailea.sa.invalid>
Message-ID: <1187614790.504321.240440@e9g2000prf.googlegroups.com>

On Aug 12, 2:03 pm, Jorgen Grahn <grahn+n... at snipabacken.dyndns.org>
wrote:
> On Sat, 11 Aug 2007 15:07:25 -0000, Dave <davmil... at gmail.com> wrote:
> > Hi there. I'm a beginner at Python and I'm writing my first Python
> > script. It's a text adventure about coffee and mixing drinks and being
> > crazy and such. I keep updating it and want my friends to beta test it
> > for me, but some of them don't have the right version of Python or
> > don't want to get Python at all. Is there an easy way I can set up a
> > public telnet server so they can just telnet the server and play it?
>
> - get yourself a Unix machine with a real, routable IP address
> - enable telnet (or better, ssh) access
> - create a new user
> - make the game this user's login shell, or let her login script
>   exec the game
> - test it out
> - distribute address, user name and password to people
>
> "netcat ... -e the_game" may be another option.
>
> However, the security implications of this may be serious. You should
> assume these people can get local user shell access whenever they feel
> like it, and use your machine for evil purposes. I trust my brother
> with local access to my machines, and noone else[1].
>
> /J?rgen
>
> [1] Well, his two cats too, but they have never logged in so far.
>     Probably forgot the password, too.
>
> --
>   // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
> \X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!

Thanks for the suggestions. I'm actually on Linux and a friend helped
me enabled SSH and make the game the login script for a dummy account,
but then he was generous enough to let me put it on a spare server of
his too. :)

As for the py2exe suggestion, I actually just tried that yesterday so
now there's a Windows Executable version of the game for friends to
try as well.

Both versions are available, plus source, from http://thegriddle.net/python/
if you want to check it out. Thanks again!

Dave



From aboudouvas at panafonet.gr  Tue Aug 14 04:11:38 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Tue, 14 Aug 2007 01:11:38 -0700
Subject: Eclipse/PyDev question
In-Reply-To: <1187011251.632213.249450@g4g2000hsf.googlegroups.com>
References: <1186998539.030727.279330@g4g2000hsf.googlegroups.com>
	<1187005485.137101.43130@l70g2000hse.googlegroups.com>
	<1187006912.494455.86830@w3g2000hsg.googlegroups.com>
	<1187011251.632213.249450@g4g2000hsf.googlegroups.com>
Message-ID: <1187079098.046629.284340@g4g2000hsf.googlegroups.com>

Fabio,

thanks for the reply!

Anyway, i saw that i cannot import anything if i use "Source Folders"
in Eclipse/PyDev. The only way i can accomplish that is by using
"PyDev Packages". Thus, i can import whatever i want ant intellisense
is working great! I just cannot understand the usefulness of "PyDev
Source Folders"...



From kyosohma at gmail.com  Mon Aug 27 17:28:35 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 27 Aug 2007 14:28:35 -0700
Subject: Getting subprocesses to be hidden on Windows
In-Reply-To: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
References: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
Message-ID: <1188250115.875160.276780@r29g2000hsg.googlegroups.com>

On Aug 27, 3:21 pm, geoffbache <geoff.ba... at pobox.com> wrote:
> Hi,
>
> As part of my efforts to write a test tool that copes with GUIs
> nicely, I'm trying to establish how I can start a GUI process on
> Windows that will not bring up the window. So I try to hide the window
> as follows:
>
> info = subprocess.STARTUPINFO()
> info.dwFlags |= subprocess.STARTF_USESHOWWINDOW
> info.wShowWindow = subprocess.SW_HIDE
>
> proc = subprocess.Popen(..., startupinfo=info)
>
> This works, in a way, but doesn't work recursively. I.e. if the
> started process itself starts a window, that second window will not be
> hidden. This even applies to dialog boxes within the application. So
> instead of a lot of windows popping up I now get a lot of disembodied
> dialogs appearing, which is a slight improvement but not much.
>
> Also, certain processes (e.g. tkdiff) seem to ignore the directive to
> be hidden altogether.
>
> This is dead easy on UNIX with virtual displays like Xvfb. Can someone
> shed any light if it's possible on Windows from python?
>
> Regards,
> Geoff Bache

I'm confused. Why would you create a GUI if you're not going to
actually display it? Isn't that the point of a GUI? Or are you talking
about the command window popping up?

Mike



From raims at dot.com  Tue Aug 28 19:24:57 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Wed, 29 Aug 2007 01:24:57 +0200
Subject: Gmane's been quiet ...
References: <mailman.88.1188343014.28954.python-list@python.org>
Message-ID: <1i3l2k9.1j3tdgr1iz19yeN%raims@dot.com>

Steve Holden <steve at holdenweb.com> wrote:
> ... so I was wondering if it's just me who hasn't seen any postings today?

I think so, through my usenet server I saw the usual lot of postings

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From horpner at yahoo.com  Mon Aug 13 09:37:26 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 13 Aug 2007 13:37:26 GMT
Subject: Colored text
References: <1186970751.435970.189900@q3g2000prf.googlegroups.com>
	<mailman.1904.1186984795.22759.python-list@python.org>
Message-ID: <slrnfc0kqf.1us.horpner@FIAD06.norwich.edu>

On 2007-08-13, Michael Bentley <michael at jedimindworks.com> wrote:
>
> On Aug 12, 2007, at 7:05 PM, Rohan wrote:
>> Can some one tell me how do I get colored text. Say when I want to
>> write something in a text file , how do I get it colored.
>
> You can use ANSI escape codes -- http://en.wikipedia.org/wiki/ 
> ANSI_escape_code:

Unfortunately, most versions of Windows of the last 7 years
(2000, XP, probably Vista) don't support ANSI escape codes well
enough to work with Python.

-- 
Neil Cerutti
We have to play hard for the full 40 minutes. 48? Oh, that's right. --Mikki
Moore


From grante at visi.com  Tue Aug 28 22:03:59 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 29 Aug 2007 02:03:59 -0000
Subject: Gmane's been quiet ...
References: <mailman.88.1188343014.28954.python-list@python.org>
	<1i3l2k9.1j3tdgr1iz19yeN%raims@dot.com>
Message-ID: <13d9l0f1i2erdc6@corp.supernews.com>

On 2007-08-28, Lawrence Oluyede <raims at dot.com> wrote:
> Steve Holden <steve at holdenweb.com> wrote:
>> ... so I was wondering if it's just me who hasn't seen any postings today?
>
> I think so, through my usenet server I saw the usual lot of postings

Posting that were made to mailing lists via gmane?

-- 
Grant Edwards                   grante             Yow!  As President I
                                  at               have to go vacuum my coin
                               visi.com            collection!


From steve at holdenweb.com  Fri Aug 24 00:00:37 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 24 Aug 2007 00:00:37 -0400
Subject: creating a tar file with python
In-Reply-To: <46CE51E1.9020608@holdenweb.com>
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>	<faktv8$8fs$1@sea.gmane.org>	<93066C069973ED448DC2BCEA9C44A7383BE2ED@efmailx>	<46CE4D3D.7020106@holdenweb.com>	<93066C069973ED448DC2BCEA9C44A7383BE2EE@efmailx>
	<46CE51E1.9020608@holdenweb.com>
Message-ID: <46CE57E5.9080908@holdenweb.com>

Steve Holden wrote:
> Brian McCann wrote:
>>  
>> <mailto:brian.mccann at viziant.net>
>> Steve,
>>  
>> I ran the code as you suggested, didn't work, tried variations of it 
>> didn't work,
>> If you don't know the answer don't pretend you do!
>>
>> Apology not accepted, please don't wake up!
>>
>> Future correspondence on any python questions from you go to trash.
>> May your pillow not have pity on your head!
>>  
> Well in that case it might have been a good idea to post the error 
> message you got from trying what I suggested rather than the one you got 
> from your fifteenth variation on my (admittedly untested) suggestion.
> 
> Not to worry, I know not to try and help you any further.
> 
> Sorry my limited Python experience wasn't able to help you solve your 
> problem.
> 
> [plonk]
> 
> regards
>   Steve
> 
> PS: this reply is *much* more polite than the one that first came to 
> mind, which involved making suggestions involving sex and travel. You're 
> on your own from here on in. I don't like being incited to spew 
> profanity on a list of people I respect.

I see you *did* post it, but then followed up with personal mail 
complaining about your lack of success and quoting another unsuccessful 
attempt to get your program working. naturally I received that before 
reading c.l.py and seeing the post I missed.

I'm not a fucking computer, you know.  There, you *have* goaded me into 
profanity. So now I'm going to follow the only sensible suggestion 
you've made and get some sleep. Feel better now?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From kyosohma at gmail.com  Mon Aug 13 16:31:00 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 13 Aug 2007 13:31:00 -0700
Subject: Finding gurus (was Re: Something in the function tutorial
	confused me.)
In-Reply-To: <mailman.1935.1187032913.22759.python-list@python.org>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<mailman.1737.1186577596.22759.python-list@python.org>
	<5hv705F3mk67nU1@mid.individual.net>
	<1i2nhnv.2y00l5173lfbbN%aleax@mac.com>
	<f9kd93$lg8$1@panix3.panix.com>
	<mailman.1935.1187032913.22759.python-list@python.org>
Message-ID: <1187037060.708280.12820@i13g2000prf.googlegroups.com>

On Aug 13, 2:22 pm, Ricardo Ar?oz <ricar... at gmail.com> wrote:
> Aahz wrote:
> > In article <1i2nhnv.2y00l5173lfbbN%al... at mac.com>,
> > Alex Martelli <al... at mac.com> wrote:
> >> Because of this, a Google search for
>
> >>  "<name> <surname>" python
>
> >> may sometimes help; when you get 116,000 hits, as for "Steve Holden"
> >> python, that may be a reasonable indication that the poster is one of
> >> the world's Python Gurus (in fact, the winner of the 2007 Frank WIllison
> >> Award -- congratulations, Steve!!!).
>
> > Sometimes that precise search pattern isn't appropriate, of course.  ;-)
>
> Sorry, will answer as soon as I read the 52000 hits for "Aahz python".
> Be patient ;c)

No offense to Steven but Alex has over twice as many hits. Gives the
rest of us something to shoot for, eh?

Mike



From kyosohma at gmail.com  Thu Aug  2 15:03:54 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 02 Aug 2007 19:03:54 -0000
Subject: XML Processing
In-Reply-To: <1186080339.344993.167670@z24g2000prh.googlegroups.com>
References: <1186080339.344993.167670@z24g2000prh.googlegroups.com>
Message-ID: <1186081434.012668.206770@z24g2000prh.googlegroups.com>

On Aug 2, 1:45 pm, Roman <rgelfa... at hotmail.com> wrote:
> Is there a package that converts a string that contains special
> characters in xml to to literal value.  For instance, converts stringhttp://myhome/&paramtohttp://myhome/&param.
>
> Thanks in advance

I've seen examples using the HTMLgen module. But here's another script
I just found:

http://mail.python.org/pipermail/python-list/1999-November/016814.html

I would think that you could use regular expressions too.

Mike



From ricaraoz at gmail.com  Tue Aug 28 18:24:47 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Tue, 28 Aug 2007 19:24:47 -0300
Subject: Haskell like (c:cs) syntax
In-Reply-To: <fb25uh$gl9$1@online.de>
References: <fb25uh$gl9$1@online.de>
Message-ID: <46D4A0AF.3050207@bigfoot.com>

Stefan Niemann wrote:
> Hi,
> 
> sorry that I'm relatively new to Python. But the syntax and semantics of 
> Python already fascinate me, because I'm familiar with functional languages 
> like Haskell.
> 
> Is there a pattern matching construct in Python like (head : tail), meaning 
> 'head' matches the first element of a list and 'tail' matches the rest? I 
> could not find this in the Python documentation.
> 
> Regards,
> Stefan
> 
> 
> 

L = ['one', 'two', 'three', 'four', 'five']

print L[0]    # This would be 'head'
print L[1:]   # This would be 'tail'

Caution : L[0] and L[1:] are COPIES of the head and tail of the list.



From zzbbaadd at aol.com  Thu Aug 30 13:44:23 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Thu, 30 Aug 2007 10:44:23 -0700
Subject: list index()
In-Reply-To: <mailman.135.1188474634.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
Message-ID: <1188495863.242815.236900@o80g2000hse.googlegroups.com>

>
> How could it not be an exception, in the plain English sense of the
> word? Most certainly you're asking for the index because you want to do
> something with the index. If the item is not found, you have no index,
> so that's a special case that must be handled separately. There is no
> logical difference between handling that special case in an except
> clause versus handling it with an if-branch.

In my case of have done os.listdir() on two directories. I want to see
what files are in directory A that are not in directory B.
I have used exceptions in other languages and only do so on logic that
should never happen. In this case it is known that some of the files
will not be in both lists. I just want to know which ones.



From carsten at uniqsys.com  Sat Aug  4 14:05:45 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Sat, 04 Aug 2007 14:05:45 -0400
Subject: sqlite3 create table col width?
In-Reply-To: <200708041351.10507.inq1ltd@inqvista.com>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<1186240708.874804.271030@b79g2000hse.googlegroups.com>
	<1186245190.970687.307920@k79g2000hse.googlegroups.com>
	<200708041351.10507.inq1ltd@inqvista.com>
Message-ID: <1186250745.3385.23.camel@dot.uniqsys.com>

On Sat, 2007-08-04 at 13:51 -0400, jim-on-linux wrote:
> PY help,
> 
> Using sqlite3 v3.1.3
> 
> When I create a table collumn using;
> 
> newcollum VARCHAR(35),
> 
> I get a default of 10 spaces.
> 
> No matter what I set the size to I get 10 spqces, 
> even using varchar(0) defaults to 10 spaces.
> 
> I would appreciae the help if someone could tell 
> me what I'm missing, I want to varry the column 
> sizes.

What you're missing is that sqlite columns are type-less. Column type
and size are irrelevant:

>>> import sqlite3
>>> conn = sqlite3.connect(":memory")
>>> cur = conn.cursor()
>>> cur.execute("create table t1 (c1 varchar(35))")
<sqlite3.Cursor object at 0xb7f6dbf0>
>>> cur.executemany("insert into t1(c1) values(?)",
...     [ ("X"*i*10,) for i in range(10) ] )
>>> cur.execute("select * from t1")
<sqlite3.Cursor object at 0xb7f6dbf0>
>>> for row in cur: print row
... 
(u'',)
(u'XXXXXXXXXX',)
(u'XXXXXXXXXXXXXXXXXXXX',)
(u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',)
(u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',)
(u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',)
(u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',)
(u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',)
(u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',)
(u'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',)

Even though the column was created to be 35 characters wide, it'll
happily accept 100-character strings.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From steve at holdenweb.com  Thu Aug 16 07:36:24 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Aug 2007 07:36:24 -0400
Subject: Changing button preferences after beeing pressed
In-Reply-To: <1187252874.903820.79280@a39g2000hsc.googlegroups.com>
References: <1187252874.903820.79280@a39g2000hsc.googlegroups.com>
Message-ID: <fa1cri$1bv$1@sea.gmane.org>

thomas.lidebrandt at gmail.com wrote:
> Hello
> 
> I'm using wxPython to consruct a GUI and want to change a button label
> and event handler to change after the button have been pressed. The
> only thing I can think of is a global variable that contrls the state
> of the program and constructs the button in accordance to the defined
> state. Is there a better solution to this problem?
> 
It would be difficult to think of a worse one! ;-)

Since the button is probably in some sort of window, you should at least 
be saving the state as an instance variable of the window. The event 
handler should start with an "if" statement that calls one or other of 
the routines you have in mind depending on state. Here's a button 
event-handlerI use in a time recording program:

     def OnPauseRestart(self, event):
         """Stops/restarts the clock: allows for non-recordable 
activities."""
         if self.Running:
             self.stopTimer()
         else:
             self.startTimer()

     def startTimer(self):
         """Starts the timer and returns the time to black."""
         if not self.currentTask:
             msg("Please select a task before starting the timer", 
caption="No current task")
             return
         self.timer.Start(1000)
         self.Time().SetForegroundColour(wx.BLACK)
         self.Time().Refresh()
         self.Pause().SetLabel("&Pause")
         self.Running = 1

     def stopTimer(self):
         """Stops the timer and sets the time red - you are not 
chargeable!"""
         self.timer.Stop()
         self.Time().SetForegroundColour(wx.RED)
         self.Time().Refresh()
         self.Pause().SetLabel("&Resume")
         self.Running = 0

Hope this helps.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From pyth0nc0d3r at gmail.com  Wed Aug 22 22:59:54 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Wed, 22 Aug 2007 21:59:54 -0500
Subject: How would I go about making a file open. Not the way you might think.
Message-ID: <eb79828c0708221959t18dd4024m251c1eac7732ec1f@mail.gmail.com>

Basically you can open a file by double clicking, and by default it would
open w/ what every program you have it set to.  Most text files would open
in notepad.  How can I make a txt open so that notepad opens w/ the content
in it by using just python.
-------------- next part --------------
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From digitalplusmail at gmail.com  Mon Aug 13 04:18:40 2007
From: digitalplusmail at gmail.com (Lepi Duja)
Date: Mon, 13 Aug 2007 08:18:40 -0000
Subject: Car Air Conditioners
Message-ID: <1186993120.706804.185590@b79g2000hse.googlegroups.com>

All the informations about car air conditioners can be found on this
website...

http://car-air-conditioning.blogspot.com/



From rajb at rice.edu  Wed Aug  1 19:14:06 2007
From: rajb at rice.edu (Raj B)
Date: Wed, 1 Aug 2007 18:14:06 -0500
Subject: Representation of new-style instance
Message-ID: <2444B7FA-6F4C-4659-8055-0D527711263B@rice.edu>

Consider a new-style class

class rabbit(object):
       def __init__(self,c):
            self.color = c

r1=rabbit("blue")
r2=rabbit("purple")

Which C struct in the Python implementation is used to represent the  
instances c1 and c2 of the
new-style class? I understand that when the class 'rabbit' is  
created, the type_new function
in typeobject.c creates a copy of a 'struct typeobject' with  
dictionary tp_dict appropriately modified.

However, I can't figure out which structure is used for new-style  
instances and where the instance dictionary is stored. Could anyone  
please clarify?

Thanks
Raj


From steven.bethard at gmail.com  Wed Aug 29 00:35:12 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 28 Aug 2007 22:35:12 -0600
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
Message-ID: <-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>

Russ wrote:
> I just stumbled onto PEP 316: Programming by Contract for Python
> (http://www.python.org/dev/peps/pep-0316/). This would be a great
> addition to Python, but I see that it was submitted way back in 2003,
> and its status is "deferred." I did a quick search on
> comp.lang.python,
> but I don't seem to see much on it. Does anyone know what the real
> status is of getting this into standard Python? Thanks.

PEP's with "deferred" status typically aren't going into Python any time 
soon, if ever.  Since the due date for all Python 3 core changes is long 
past due, you won't even be seeing it in Python 3.

Steve


From half.italian at gmail.com  Mon Aug 27 15:47:30 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: Mon, 27 Aug 2007 12:47:30 -0700
Subject: Socket - gaierror
In-Reply-To: <OIidnbjzCJVLu07bnZ2dnUVZ_gidnZ2d@comcast.com>
References: <1188242671.182072.130150@r23g2000prd.googlegroups.com>
	<OIidnbjzCJVLu07bnZ2dnUVZ_gidnZ2d@comcast.com>
Message-ID: <1188244050.029920.314700@i13g2000prf.googlegroups.com>

On Aug 27, 12:32 pm, Larry Bates <larry.ba... at websafe.com> wrote:
> half.ital... at gmail.com wrote:
> > Hi all,
>
> > I'm having trouble with the socket module resolving a hostname.  It
> > seems like this is a system level problem, but I'm not even sure where
> > to start.  I can ping the smtp server by name and IP, but when
> > smtp.SMTP("theHost") tries to get the hostname, it keeps giving me the
> > following error:
>
> >   File "bin/program.py", line 123, in notify
> >     smtp = smtplib.SMTP("theHost")
>
> >   File "/usr/lib/python2.4/smtplib.py", line 255, in __init__
> >     addr = socket.gethostbyname(socket.gethostname())
>
> > gaierror: (-2, 'Name or service not known')
>
> > I tried changing to a different smtp server, using an ip instead of a
> > host name.  I could ping both boxes by name oor IP.
>
> > any ideas?
>
> > ~Sean
>
> The specific error shown is a DNS resolution problem.  Based on the
> URL "theHost" smtplib can't resolve to an IP address (which is what
> socket.gethostbyname does).  You don't say what happened when you changed to ip,
> but I suspect it is a different error or some other problem.  Maybe a firewall
> issue (port 25 not open?), but I'm just guessing.
>
> -Larry

Changing it to IP gives me the same exact error...

  File "bin/prgram.py", line 123, in notify
    smtp = smtplib.SMTP("XXX.XXX.XXX.XXX")

  File "/usr/lib/python2.4/smtplib.py", line 255, in __init__
    addr = socket.gethostbyname(socket.gethostname())

gaierror: (-2, 'Name or service not known')

Looks like the smtp port is closed on the client machine...doh Should
have gotten to that!

Thank you.

~Sean



From Elric02 at rogers.com  Thu Aug  9 21:20:08 2007
From: Elric02 at rogers.com (Elric02 at rogers.com)
Date: Thu, 09 Aug 2007 18:20:08 -0700
Subject: Emacs PDB Windows
Message-ID: <1186708808.875261.111140@i13g2000prf.googlegroups.com>

I'm trying to get PDB working on Emacs 2.1.3, Python 2.3, Windows XP.
Whenever I try to run a Python file from the Emacs buffer using the
PDB command I get the following error
"spawning child process: invalid process"
I've tried the exact same command from the command prompt and the
debugger works properly.
If anyone he has any ideas for a completely lost newbie that would be
much appreciated...



From bignose+hates-spam at benfinney.id.au  Mon Aug 27 19:38:37 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 28 Aug 2007 09:38:37 +1000
Subject: "Try:" which only encompasses head of compound statement
References: <1188250535.607963.42540@22g2000hsm.googlegroups.com>
Message-ID: <87wsvgfszm.fsf@benfinney.id.au>

Jameson.Quinn at gmail.com writes:

> try:
>     for line in open(myFileName):
>         count += openAndProcessSubfile(line)
> except IOError:
>     print "Can't open myfile"
> 
> ... now the 'except' incorrectly catches errors from
> openAndProcessSubfile.

So don't include it. You've discovered a good principle of
exception-based programming: try to only catch exceptions from the
minimum amount of code that does one discrete action.

    try:
        input_file = open(my_filename)
    except IOError, exc:
        print "Can't open myfile: %(exc)" % locals()

    for line in input_file:
        count += open_and_process_subfile(line)

This is easier to read, because it's clearer what's going on. Never be
ashamed to break apart a compound statement into simpler statements if
that will improve readability.

(It's also easier to read because it follows naming conventions in
PEP-8, which I strongly suggest you follow.)

> ...But if my compound statement is "with" instead of "for" that seems
> to defeat the purpose:
> 
> try:
>     myFile = open(myFileName)
> except IOError:
>     print "Can't open myfile"
> with myFile as anotherNameForMyFile:
>     ....
> 
> This is not a very readable "with" statement, I end up giving the
> same thing two names,

Why do that then? You don't need to assign a different name for the
target.

    with input_file:
        # ... do stuff

> and there's a moment when the above code doesn't know to close
> myFile.

Closing the file will occur when the object is cleaned up by garbage
collection.

-- 
 \      "I bought a self learning record to learn Spanish. I turned it |
  `\        on and went to sleep; the record got stuck. The next day I |
_o__)                could only stutter in Spanish."  -- Steven Wright |
Ben Finney


From enleverlesX.XmcX at XmclaveauX.com  Wed Aug  8 03:54:26 2007
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI (MVP))
Date: Wed, 8 Aug 2007 09:54:26 +0200
Subject: Seek the one billionth line in a file containing 3 billion lines.
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
Message-ID: <46b977e9$0$27390$ba4acef3@news.orange.fr>

Hi!

Create a "index" (a file with 3,453,299,000 tuples : 
line_number + start_byte) ; this file has fix-length lines.
slow, OK, but once.

Then, for every consult/read a specific line:
  - direct acces read on index
  - seek at the fisrt byte of the line desired



@+

Michel Claveau




From arkanes at gmail.com  Thu Aug 30 16:44:59 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 30 Aug 2007 15:44:59 -0500
Subject: Is LOAD_GLOBAL really that slow?
In-Reply-To: <1188505868.337081.319790@q4g2000prc.googlegroups.com>
References: <aac2c7cb0708291823h15e3f675mbeae9ecf37d653b6@mail.gmail.com>
	<mailman.130.1188441225.28954.python-list@python.org>
	<1188495447.083333.271540@q4g2000prc.googlegroups.com>
	<mailman.152.1188497059.28954.python-list@python.org>
	<1188505868.337081.319790@q4g2000prc.googlegroups.com>
Message-ID: <4866bea60708301344h647de958y3a7d47095be2a56c@mail.gmail.com>

On 8/30/07, Rhamphoryncus <rhamph at gmail.com> wrote:
> On Aug 30, 12:04 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> > On 8/30/07, Rhamphoryncus <rha... at gmail.com> wrote:
> >
> > > On Aug 29, 8:33 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> > > > On Wed, 2007-08-29 at 19:23 -0600, Adam Olsen wrote:
> > > > There is no loop overhead here, and after subtracting the function call
> > > > overhead, I get 31 nanoseconds per local lookup and 63 nanoseconds per
> > > > global lookup, so local lookups are just about twice as fast as global
> > > > lookups.
> >
> > __builtins__ lookups are an extra dict lookup slower than just global
> > variables, too. Don't forget those.
>
> Heh right, I forgot that.  That's what my benchmark was actually
> testing.
>
>
> > > > True, whether this difference is significant does depend on how many
> > > > name lookups your code makes and how much else it's doing, but if you're
> > > > doing a lot of number crunching and not a lot of I/O, the difference
> > > > might be significant. Also, even if using local names is only slightly
> > > > faster than using globals, it's still not slower, and the resulting code
> > > > is still more readable and more maintainable. Using locals is a win-win
> > > > scenario.
> >
> > > You get very small speed gains (assuming your code is doing anything
> > > significant), for a lot of effort (trying out different options,
> > > seeing if they're actually faster on different boxes.)  The
> > > readability cost is there, even if it is smaller than many of the
> > > other obfuscations people attempt.  If the speed gains were really
> > > that important you should rewrite in C, where you'd get far greater
> > > speed gains.
> >
> > I've doubled the speed of a processing loop by moving globals lookups
> > out of the loop. Rewriting in C would have taken at least a day, even
> > with Pyrex, localizing the lookup took about 2 minutes.
>
> I'm guessing that was due to deep voodoo involving your processor's
> pipeline, branch prediction, caching, etc.  I'd be interested in
> seeing small examples of it though.
>

There's certainly deep voodoo involved in the function. For example, I
used to have a test for early exit but the branch was slower than the
extra 3 function calls prevented by the branch.  Very surprised to get
that result at such a high level, but I tested (over and over) and it
was very consistent. This was with psyco as well, so perhaps some
characteristic of the generated assembly.

Psyco of course is even less work and more benefit than localizing
globals, so thats my first step for "make it faster".

>
> > > So it only seems worthwhile when you really, *really* need to get a
> > > slight speedup on your box, you don't need to get any more speedup
> > > than that, and C is not an option.
> >
> > It's not a huge optimization, but it's really easy to write if you
> > don't mind adding fake kwargs to your functions. Just for the heck of
> > it I also wrote a decorator that will re-write the bytecode so that
> > any global that can be looked up at function definition will be
> > re-written as a local (actually with LOAD_CONST). You can see it athttp://code.google.com/p/wxpsvg/wiki/GlobalsOptimization. Disclaimer:
> > While I've tested it with a variety of functions and it's never broken
> > anything, I've never actually used this for anything except an
> > intellectual exercise. Use at your own risk.
>
> Doubling the throughput while doing *real work* is definitely more
> significant than maybe-or-maybe-not-quite-doubling without any real
> work.
>

I wouldn't actually recommend that anyone use this, I just wrote it for fun.


From franz.steinhaeusler at gmx.at  Sun Aug  5 11:14:13 2007
From: franz.steinhaeusler at gmx.at (Franz Steinhäusler)
Date: Sun, 05 Aug 2007 17:14:13 +0200
Subject: Best programs written completly in Python
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
	<20070805112006.GA3558@gmail.com>
	<mailman.1645.1186315364.22759.python-list@python.org>
Message-ID: <h5qbb3t7uf6hm6e0h0djajlkeo2rsh8csk@4ax.com>

On Sun, 05 Aug 2007 21:31:23 +1000, Campbell Barton
<cbarton at metavr.com> wrote:

>O.R.Senthil Kumaran wrote:
>> * Franz Steinh?usler <franz.steinhaeusler at gmx.at> [2007-08-05 12:14:38]:
>> 
>>> wWhat are the best programs in your opinion, written entirly
>>> in pyhton, divided into categories like:
>>> a) Games
>>> b) Utilities/System
>>> c) Office
>>> d) Web/Newsreader/Mail/Browser
>> 
>> Its a difficult question to answer as the software are aplenty and there is no
>> judgement basis as this one is the best.
>> 
>> Head on to www.python.org and see for yourself for programs under each
>> category.
>> 
>> And moreover, "written entirely in python" is a constrain to find the
>> programs. Why do you need such a list for?
>
>Of course this is totally objective, but that dosnt mean its not a valid 
>question.
>
>If you were starting out a project were thinking of writing it in 
>python, you might want to look at whats out there - maybe python has 
>limitations which stops it being a good choice in some situations (for 
>instance?)- on the other hand you might want to see some shining 
>examples that prove the capabilities of python ;)
>
>'Being written entirely in python' - is a bit tricky, often these 
>applications rely on some specific extension or make heavy use of a 
>backend that dosnt come with python (like pygame, pygtk, or py-gstreamer).
>
>Games - See Pygame http://www.pygame.org/projects/6
>
>
>Utilities/System
>
>* meld is a really nice diffing tool for linux - http://meld.sourceforge.net
>* ubuntu have some of their install tools in python.
>* txt2tags - a great markup language for doc writing. - 
>http://txt2tags.sourceforge.net/
>* sound recording/editing - http://www.jokosher.org

Thank you for that interesting applications.
They are surely interesting as example of learning pyhton
and convince some people to choose/switch to pyhton.

>
>Office?? - no idea, openoffice can be scripted in python.
>
>Web - * isnt bit torrent python?, probably lots of stuff but I dont know 
>of them ;)

That purpose also a good list could fulfill, to show the capabilities
of pyhton not only on a theoretical way of showing sample code.


-- 
Franz Steinhaeusler


From beema.shafreen at gmail.com  Fri Aug 17 02:32:36 2007
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Fri, 17 Aug 2007 12:02:36 +0530
Subject: clarification
Message-ID: <aa405c1f0708162332t7b6dbdd6o2cc0f512dc821d7b@mail.gmail.com>

hi everybody,
i have a file with data separated by tab
mydata:
fhl1    fkh2
dfp1    chk1
mal3    alp14
mal3    moe1
mal3    spi1
mal3    bub1
mal3    bub3
mal3    mph1
mal3    mad3
hob1    nak1
hob1    wsp1
hob1    rad3
cdr2    cdc13
cdr2    cdc2
shows these two are separated by tab represented as columns
i have to check the common data between these two coloumn1 an coloumn2
my code:
data = []
data1 = []
result = []
fh = open('sheet1','r')
for line in fh.readlines():
        splitted = line.strip().split('\t')
        data.append(splitted[0])
        data1.append(splitted[1])
        for k in data:
                if k in data1:
                        result.append(k)
                        print result
fh.close()

can you tell me problem with my script and what should is do for this

regards
shafreen
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From mccredie at gmail.com  Wed Aug 15 19:08:44 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Wed, 15 Aug 2007 16:08:44 -0700
Subject: threads, mutual exclusion, and lists
In-Reply-To: <1187206583.255588.57920@e9g2000prf.googlegroups.com>
References: <1187206583.255588.57920@e9g2000prf.googlegroups.com>
Message-ID: <9e95df10708151608x3c5a341dyb3ff79851a3bf65e@mail.gmail.com>

> My question is -- are python list operations atomic? If they are not,
> then I assume I need to put some mutual exclusion around the append()
> and pop() calls ?

They are not, but there is one included in the standard library:
http://docs.python.org/dev/lib/module-Queue.html

Matt


From jf.pieronne at laposte.net  Tue Aug  7 06:30:38 2007
From: jf.pieronne at laposte.net (=?ISO-8859-1?Q?Jean-Fran=E7ois_Pi=E9ronne?=)
Date: Tue, 07 Aug 2007 12:30:38 +0200
Subject: seeking tinter module
Message-ID: <46b849cf$0$21841$426a74cc@news.free.fr>

I'm looking for a module name tinter (not tkinter...)

from http://www.vex.net/parnassus/apyllo.py?i=97497223
status: Dead and Gone

Google return no location to download it, only a few
articles mentionned it, for example:
http://www.ibm.com/developerworks/linux/library/l-python6.html


Does someone has still a copy of this module?


Thanks,

JF


From zxo102 at gmail.com  Sat Aug  4 02:33:19 2007
From: zxo102 at gmail.com (zxo102)
Date: Sat, 04 Aug 2007 06:33:19 -0000
Subject: Help: GIS
In-Reply-To: <1186148083.009159.89310@j4g2000prf.googlegroups.com>
References: <1186112804.718290.207580@z24g2000prh.googlegroups.com>
	<1186148083.009159.89310@j4g2000prf.googlegroups.com>
Message-ID: <1186209199.488059.211070@e16g2000pri.googlegroups.com>

On 8 3 ,   9 34 , kyoso... at gmail.com wrote:
> On Aug 2, 10:46 pm, zxo102 <zxo... at gmail.com> wrote:
>
> > Hi,
> >     I am new in GIS area and need your suggestions for where I can
> > start from.  I have a python based web application with a database.
> > Now I would like to add a GIS map into my application. When a user
> > clicks a certain area in the GIS map, it can grab the data from the
> > database via my python based application. Do I have to use MapServer
> > or Grass or some other  backends for this purpose?
> >    Thanks  a lot.
>
> > Ouyang
>
> While I am not a part of our GIS department, they use ArcGIS which has
> Python support built in. If that's what you're using, you should be
> able to use the examples given on ESRI's website:http://www.spatialvision.com.au/html/tips-python-arc9.htm
>
> Hmmm...not much there. Here are some other links I found:
>
> http://nrm.salrm.uaf.edu/~dverbyla/arcgis_python/index.htmlhttp://www.ollivier.co.nz/publication/uc2004/python_workshop/sld008.htmhttp://www.3dartist.com/WP/python/pycode.htm
>
> I don't know if these will be much help. You really need to just dig
> in and start coding. I would recommend "Programming Python 3rd Ed." by
> Lutz if you want something in hard copy. "Dive Into Python" is a free
> book that's online that I'm told is very good. Both have good
> examples, some of which are involved. All the web oriented Python
> books are a few years old, but the code in them still works, for the
> most part.
>
> Mike

Mike, Thanks for your suggestion. I am looking for a python GIS
package (without any other GIS backends like mapserver) which can be
simply imported into my current python web application. I am not sure
if it is available. So far, the close one I found is Python
Cartographic Lab. But I can not find any examples for PCL. Anyway, I
am still on the way of the deep learning curve for GIS.

Ouyang
Ouyang



From jjl at pobox.com  Tue Aug  7 17:09:01 2007
From: jjl at pobox.com (John J. Lee)
Date: Tue, 07 Aug 2007 21:09:01 GMT
Subject: ensuring GNU readline isn't used
References: <mailman.1711.1186491401.22759.python-list@python.org>
	<Xns99858FA1445D0duncanbooth@127.0.0.1>
Message-ID: <87hcnboxw2.fsf@pobox.com>

Duncan Booth <duncan.booth at invalid.invalid> writes:

> Josh Paetzel <josh at tcbug.org> wrote:
>
>> Is there a way to ensure that GNU readline isn't used (even though
>> support may have been compiled in?).  I'm experiencing a licensing
>> problem, I'd like to use the "cmd" module, for example, but my code is
>> proprietary and hence, if cmd uses readline, I can't use cmd.
>
> I think you have misread the GPL: just because your non-GPL code *can* be 
> used with something covered by the GPL doesn't mean your code is infected 
> by the GPL. Your code doesn't require a GPL module to run (you can use a 
> version of cmd compiled without readline), and you aren't attempting to 
> distribute it with a GPL module, so you don't need to care how the end user 
> chooses to run it.

Indeed -- I recall coming across some commercial control &
data-acquisition software which was distributed with an inferior
readline work-alike library, but came with detailed instructions for
how to use GNU readline instead.  All users who had the time and good
sense presumably linked with readline proper.


John


From jjl at pobox.com  Sun Aug  5 16:50:40 2007
From: jjl at pobox.com (John J. Lee)
Date: Sun, 05 Aug 2007 20:50:40 GMT
Subject: A question on plugin design
References: <mailman.1643.1186312593.22759.python-list@python.org>
	<87fy2yrp4y.fsf@pobox.com>
Message-ID: <873ayxso2o.fsf@pobox.com>

jjl at pobox.com (John J. Lee) writes:

> Grzegorz S?odkowicz <jergosh at wp.pl> writes:
> [...]
>> I'd also be grateful for pointers to a well designed Pythonic plugin
>> architecture but I'd much prefer a small project with a simple API.
>
> Google for setuptools and Python eggs.  Search for "entry point" on
> the setuptools page.

And as an example of a project that uses that plugin system, look at
the nose testing tool (I suggest looking at version 0.10, not version
0.9):

http://code.google.com/p/python-nose/


John


From byte8bits at gmail.com  Fri Aug 24 12:43:55 2007
From: byte8bits at gmail.com (brad)
Date: Fri, 24 Aug 2007 12:43:55 -0400
Subject: Regular expression use
In-Reply-To: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
Message-ID: <fan1vb$kv8$1@solaris.cc.vt.edu>

Nick Maclaren wrote:
> For reasons that I won't explain, as they are too complicated
> and not terribly relevant, I am interested in discovering what
> people actually use regular expressions for.

Finding credit card numbers in files...among other things:

http://filebox.vt.edu/users/rtilley/public/find_ccns/


From simon at brunningonline.net  Mon Aug  6 16:00:32 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Mon, 6 Aug 2007 21:00:32 +0100
Subject: Any Good Book To Start ?
In-Reply-To: <1186426924.388898.224310@l70g2000hse.googlegroups.com>
References: <1186426924.388898.224310@l70g2000hse.googlegroups.com>
Message-ID: <8c7f10c60708061300p6b78f1cdqaa6678e226a31e22@mail.gmail.com>

On 8/6/07, Katie Tam <katietam at gmail.com> wrote:
> Please let me know any good book to start ? Thank You

http://wiki.python.org/moin/PythonBooks

-- 
Cheers,
Simon B.
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/
GTalk: simon.brunning | MSN: small_values | Yahoo: smallvalues


From kyosohma at gmail.com  Fri Aug  3 09:07:13 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 03 Aug 2007 06:07:13 -0700
Subject: wxpython TreeCtrl with os.listdir
In-Reply-To: <1186142214.786703.75380@w3g2000hsg.googlegroups.com>
References: <1186142214.786703.75380@w3g2000hsg.googlegroups.com>
Message-ID: <1186146433.951948.26380@z24g2000prh.googlegroups.com>

On Aug 3, 6:56 am, vedrandeko... at v-programs.com wrote:
> Hello,
>
> Does anybody know how can I "insert" os.listdir items in wx python
> TreeCtrl and every item assign adequately
> icon on this example
> import wx
>
> class TestFrame(wx.Frame):
>     def __init__(self):
>         wx.Frame.__init__(self, None, title="simple tree with icons",
> size=(400,500))
>
>         il = wx.ImageList(16,16)
>
>         # adequately icons
>         self.fldridx = il.Add(wx.ArtProvider.GetBitmap(wx.ART_FOLDER,
> wx.ART_OTHER, (16,16))) # icon for os.listdir folder
>         self.fldropenidx =
> il.Add(wx.ArtProvider.GetBitmap(wx.ART_FILE_OPEN,wx.ART_OTHER,
> (16,16)))
> # icon for os.listdir file
>         self.fileidx =
> il.Add(wx.ArtProvider.GetBitmap(wx.ART_NORMAL_FILE, wx.ART_OTHER,
> (16,16)))
> # icon for os.listdir open folder
>
>         self.tree = wx.TreeCtrl(self)
>
>         self.tree.AssignImageList(il)
>         root = self.tree.AddRoot("wx.Object")
>         self.tree.SetItemImage(root,
> self.fldridx,wx.TreeItemIcon_Normal)
>         self.tree.SetItemImage(root,
> self.fldropenidx,wx.TreeItemIcon_Expanded)
>
>         self.AddTreeNodes(root, data.tree)  # There must be os.listdir
> items
>         self.tree.Expand(root)
>
>     def AddTreeNodes(self, parentItem, items):
>         for item in items:
>             if type(item) == str:
>                 newItem = self.tree.AppendItem(parentItem, item)
>                 self.tree.SetItemImage(newItem,
> self.fileidx,wx.TreeItemIcon_Normal)
>             else:
>                 newItem = self.tree.AppendItem(parentItem, item[0])
>                 self.tree.SetItemImage(newItem,
> self.fldridx,wx.TreeItemIcon_Normal)
>                 self.tree.SetItemImage(newItem,
> self.fldropenidx,wx.TreeItemIcon_Expanded)
>
>                 self.AddTreeNodes(newItem, item[1])
>
>     def GetItemText(self, item):
>         if item:
>             return self.tree.GetItemText(item)
>         else:
>             return ""
>
> app = wx.PySimpleApp(redirect=True)
> frame = TestFrame()
> frame.Show()
> app.MainLoop()
>
> Regards,
> Vedran

This looks like something to post to the wxPython user's group, found
here: http://www.wxpython.org/maillist.php

The treectrl is one of the more complicated widgets of the wxPython
set.

Mike



From owntheweb at gmail.com  Wed Aug 29 10:56:21 2007
From: owntheweb at gmail.com (Ultrus)
Date: Wed, 29 Aug 2007 14:56:21 -0000
Subject: replacing xml elements with other elements using lxml
Message-ID: <1188399381.188639.289480@57g2000hsv.googlegroups.com>

Hello,
I'm attempting to generate a random story using xml as the document,
and lxml as the parser. I want the document to be simplified before
processing it further, and am very close to accomplishing my goal.
Below is what I have so far. Any ideas on how to move forward?

The goal:
read and edit xml file, replacing random elements with randomly picked
content from within

Completed:
[x] read xml
[x] access first random tag
[x] pick random content within random item
[o] need to replace <random> tag with picked contents

xml sample:
<contents>Here is some content.</contents>
<random>
   <item><contents>Here is some random content.</contents></item>
   <item><contents>Here is some more random content.</contents></item>
</random>
<contents>Here is some content.</contents>

Python code:
from lxml import etree
from StringIO import StringIO
import random

theXml = "<contents>Here is some content.</
contents><random><item><contents>Here is some random content.</
contents></item><item><contents>Here is some more random content.</
contents></item></random><contents>Here is some content.</contents>"

f = StringIO(theXml)
tree = etree.parse(f)
r = tree.xpath('//random')

if len(r) > 0:
   randInt = random.randInt(0,(len(r[0]) - 1))
   randContents = r[0][randInt][0]
   #replace parent random tag with picked content here

now that I have the contents tag randomly chosen, how do I delete the
parent <random> tag, and replace it to look like this:

final xml sample (goal):
<contents>Here is some content.</contents>
<contents>Here is some random content.</contents>
<contents>Here is some content.</contents>

Any idea on how to do this? So close! Thanks for the help in
advance. :)



From mikael at isy.liu.se  Fri Aug 24 05:39:13 2007
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Fri, 24 Aug 2007 11:39:13 +0200
Subject: beginner, idiomatic python
In-Reply-To: <13ct7v3qn2v5206@corp.supernews.com>
References: <13cqlqbbpn0dmea@corp.supernews.com><1187898049.734696.9500@l22g2000prc.googlegroups.com><13csi2tn49esmc3@corp.supernews.com>	<mailman.230.1187928865.32294.python-list@python.org>	<13csqk47j0c56b0@corp.supernews.com>	<CqSdnRl2x8928FPbnZ2dnUVZ_jSdnZ2d@speakeasy.net>
	<13ct7v3qn2v5206@corp.supernews.com>
Message-ID: <46CEA741.7050409@isy.liu.se>



bambam wrote:
>
> In this case it doesn't matter - my lists don't contain
> duplicate elements this time - but I have worked with lists in
> money market and in inventory, and finding the intersection
> and difference for matching off and netting out are standard
> operations.

I would use a list comprehension for that case:

A = ['a','b','c','a','c','d']
U = ['a','b','e']
B = [x for x in A if x in U]

The result would be B==['a','b','a']

/MiO


From carsten at uniqsys.com  Thu Aug 23 10:56:45 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 23 Aug 2007 10:56:45 -0400
Subject: Baby Steps, optionDB
In-Reply-To: <4_gzi.30161$RX.21287@newssvr11.news.prodigy.net>
References: <Uk7zi.1531$vU4.979@nlpi068.nbdc.sbc.com>
	<1187862216.183609.89810@r23g2000prd.googlegroups.com>
	<Pcezi.6450$924.6108@newssvr23.news.prodigy.net>
	<mailman.169.1187874026.32294.python-list@python.org>
	<4_gzi.30161$RX.21287@newssvr11.news.prodigy.net>
Message-ID: <1187881005.3380.34.camel@dot.uniqsys.com>

On Thu, 2007-08-23 at 14:38 +0000, W. Watson wrote:
>  The ultimate in conciseness was APL.

I think you are mistaking terseness for conciseness.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From mail at microcorp.co.za  Fri Aug 31 02:43:43 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 31 Aug 2007 08:43:43 +0200
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com><46d674c2$0$417$426a34cc@news.free.fr><1188496588.750629.208100@g4g2000hsf.googlegroups.com>
	<1188497498.3468.60.camel@dot.uniqsys.com>
Message-ID: <021801c7eba2$ad429640$03000080@hendrik>

"Carsten Haese" <car...ys.com> wrote:

> .................. If we start labeling
> people, this thread will earn you a label that rhymes with "roll".

weird this - maybe a native English speaker can comment - 
when I pronounce what fishermen do - it rhymes with roll,
but when I am talking about the thing that lives under bridges
and munches goats, the "O" sound is shorter, and more 
towards the back of my mouth.

- Hendrik



From danmcleran at yahoo.com  Tue Aug 14 12:26:27 2007
From: danmcleran at yahoo.com (danmcleran at yahoo.com)
Date: Tue, 14 Aug 2007 09:26:27 -0700
Subject: Simple python iteration question
In-Reply-To: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
References: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
Message-ID: <1187108787.998690.37500@q3g2000prf.googlegroups.com>

On Aug 14, 10:22 am, Bryan <b... at bcc.com> wrote:
> Hi,
>
> I just started with python, and have a for loop question
>
> In c++ (or a number of other languages) I can do this:
>
> for (int i=0, j=0; i < i_len, j< j_len; ++i, ++j) {}
>
> If I have this in python:
> l = ['a', 'b', 'c']
>
> I want to get the value and also an iterator:
> for i,v in len(l), l:
>         print v
>         print i
>
> Or something like this without declaring the iterator outside my loop...
>
> How do I do this?
> Thanks!

this will get index and item at index,

for i in range(0, len(l)):
    print i
    print l[i]




From DustanGroups at gmail.com  Sun Aug 12 20:57:28 2007
From: DustanGroups at gmail.com (Dustan)
Date: Mon, 13 Aug 2007 00:57:28 -0000
Subject: A dumb question about a class
In-Reply-To: <1186965321.741540.108820@k79g2000hse.googlegroups.com>
References: <mailman.1887.1186955369.22759.python-list@python.org>
	<TqSdnWYzVdWvGCLbnZ2dnUVZ_saknZ2d@comcast.com>
	<1186965321.741540.108820@k79g2000hse.googlegroups.com>
Message-ID: <1186966648.867722.185770@19g2000hsx.googlegroups.com>

On Aug 12, 7:35 pm, Dustan <DustanGro... at gmail.com> wrote:
> On Aug 12, 5:09 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
>
> >      def iter_primes():
> >          # an iterator of all numbers between 2 and +infinity
> >          numbers = itertools.count(2)
>
> >          # generate primes forever
> >          while True:
>
> >              # get the first number from the iterator (always a prime)
> >              prime = numbers.next()
> >              yield prime
>
> >              # remove all numbers from the (infinite) iterator that are
> >              # divisible by the prime we just generated
> >              numbers = itertools.ifilter(prime.__rmod__, numbers)
>
> This is kind of OT (from the thread), but in this iter_primes
> function, numbers is becoming an ifilter of an ifilter of an ifilter
> of an ifilter of an ifilter of an ifilter of... Is that really at all
> efficient for larger numbers (millions or billions, or even bigger)?

To word my question better:

How does this algorithm compare and contrast to maintaining a
dictionary or set and iterating through those structures to find out
if a number is divisible? All of those algorithms I've described are
O(n^2), if I'm not mistaken, but as far as memory-efficiency and the
likes, how do they compare/contrast?



From markacy at gmail.com  Sun Aug  5 14:26:13 2007
From: markacy at gmail.com (markacy)
Date: Sun, 05 Aug 2007 11:26:13 -0700
Subject: Best programs written completly in Python
In-Reply-To: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
Message-ID: <1186338373.738163.257890@o61g2000hsh.googlegroups.com>

On 5 Sie, 12:14, Franz Steinh?usler <franz.steinhaeus... at gmx.at>
wrote:
> Hello NG,
>
> wWhat are the best programs in your opinion, written entirly
> in pyhton, divided into categories like:
> a) Games
> b) Utilities/System
> c) Office
> d) Web/Newsreader/Mail/Browser
> ...
>
> I don't want to start a long thread, if a site of such
> an discussion already exists, a link will be enough.
>
> Many thanks in advance!
>
> --
> Franz Steinhaeusler

I guess, that gentoo's portage is (almost?) entirely written in
python. The same is with Zope/Plone (Web category), though I know,
that Zope has some parts of code written in C. Django?

Big part's of google "tools" are written in python as well. Matplotlib
is said to be written entirely in python.
These are examples from the top of my head. If I'll came up with
something else, I will let You know :-)

Cheers,
Marek



From jeffmess at gmail.com  Mon Aug  6 16:20:44 2007
From: jeffmess at gmail.com (jeffmess at gmail.com)
Date: Mon, 06 Aug 2007 20:20:44 -0000
Subject: Any Good Book To Start ?
In-Reply-To: <mailman.1693.1186430867.22759.python-list@python.org>
References: <1186426924.388898.224310@l70g2000hse.googlegroups.com>
	<mailman.1693.1186430867.22759.python-list@python.org>
Message-ID: <1186431644.366479.177890@o61g2000hsh.googlegroups.com>

On Aug 6, 10:00 pm, "Simon Brunning" <si... at brunningonline.net> wrote:
> On 8/6/07, Katie Tam <katie... at gmail.com> wrote:
>
> > Please let me know any good book to start ? Thank You
>
> http://wiki.python.org/moin/PythonBooks
>
> --
> Cheers,
> Simon B.
> si... at brunningonline.nethttp://www.brunningonline.net/simon/blog/
> GTalk: simon.brunning | MSN: small_values | Yahoo: smallvalues

Hi Katie

I would recommend the Python Phrasebook by Brad Dayley. Lots and lots
of examples and easy to use. Mark Lutz is a bit heavy for a beginner
but definitely a good investment for the future. The Python Docs are
also very good and check out diveintopython.org.

Regards

Jeffrey van Aswegen



From gregpinero at gmail.com  Fri Aug  3 11:14:26 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Fri, 03 Aug 2007 15:14:26 -0000
Subject: Best way to capture output from an exec'ed (or such) script?
In-Reply-To: <mailman.1547.1186097565.22759.python-list@python.org>
References: <1186084086.212050.264270@q3g2000prf.googlegroups.com>
	<mailman.1547.1186097565.22759.python-list@python.org>
Message-ID: <1186154066.529360.90260@q75g2000hsh.googlegroups.com>

On Aug 2, 7:32 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> If your web server is multithreaded (or you use some other way to process
> many simultaneous requests) you have to be more careful - remember that
> sys.stdout is global, you must find a way to distinguish between output
>  from different processes all going into the same collector.
>
Any ideas on how to do this?  Is it even possible?

-Greg



From joesox at gmail.com  Mon Aug 20 15:53:55 2007
From: joesox at gmail.com (JoeSox)
Date: Mon, 20 Aug 2007 12:53:55 -0700
Subject: 'REPL' style IDE
In-Reply-To: <785694cd0708201251q45316c16of3516eb8254fd4d8@mail.gmail.com>
References: <1187632249.748945.158910@i13g2000prf.googlegroups.com>
	<785694cd0708201251q45316c16of3516eb8254fd4d8@mail.gmail.com>
Message-ID: <785694cd0708201253o301f18b6mde4122d9c3ba2f08@mail.gmail.com>

On 8/20/07, JoeSox <joesox at gmail.com> wrote:
> On 8/20/07, beginner <zyzhu2000 at gmail.com> wrote:
> > Hi Everyone,
> >
> > I am using the Wing IDE. It works great when developing applications,
> > but the workflow is like Visual Studio -- after you execute it or
> > debug it, the python script ends.
> >
> > What I want is an interactive interpreting environment. I want the IDE
> > to execute a boot script to initialize my environment and create some
> > basic data objects. And then I want to be able to type in command on
> > the command line using these objects. The IDLE that comes with Python
> > does this, but compared with Wing, it does not have a lot of the
> > convenient features.
> >
> > I am wondering if there is anything more powerful than IDLE that can
> > do this.
>
> I use Wing IDE.
> Place something like this on the bottom of your module you are debuging.
> Place a stop point on the line you want then start your debug! Hope that helps.
>
> def test():
>    c=MyClass
>    c.do_foobar()
>
> if __name__ == '__main__':
>  test()

Just seeing if you all were paying attention :P

s/b...
c=MyClass()

-- 
Later, Joe


From thomas at jollans.com  Mon Aug  6 11:30:08 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Mon, 6 Aug 2007 17:30:08 +0200
Subject: boolean operations on sets
In-Reply-To: <1186409631.147290.323400@22g2000hsm.googlegroups.com>
References: <1186409631.147290.323400@22g2000hsm.googlegroups.com>
Message-ID: <200708061730.13915.thomas@jollans.com>

On Monday 06 August 2007, Flavio wrote:
> So My question is: Why has this been implemented in this way? I can
> see this confusing many newbies...

I did not implement this, so I cannot say, but it does have useful 
side-effects, for example:

x = A or B

is equivalent to:

if A:
  x = A
else:
  x = B

also, in python implementations without the (y if x else z) syntax, you can 
use (x and y or z) with nearly the same result*. Also, this implementation of 
and/or might well be faster ;-)


*: this doesn't work the same if y is a false value; (x and [y] or [z])[0] is
   less readable, but works for all y

-- 
      Regards,                       Thomas Jollans
GPG key: 0xF421434B may be found on various keyservers, eg pgp.mit.edu
Hacker key <http://hackerkey.com/>:
v4sw6+8Yhw4/5ln3pr5Ock2ma2u7Lw2Nl7Di2e2t3/4TMb6HOPTen5/6g5OPa1XsMr9p-7/-6
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From ricaraoz at gmail.com  Thu Aug 30 22:38:22 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Thu, 30 Aug 2007 23:38:22 -0300
Subject: list index()
In-Reply-To: <1i3ob5k.dm3jmoqx1z68N%aleax@mac.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<mailman.135.1188474634.28954.python-list@python.org>	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<1i3ob5k.dm3jmoqx1z68N%aleax@mac.com>
Message-ID: <46D77F1E.7030800@bigfoot.com>

Alex Martelli wrote:
> <zzbbaadd at aol.com> wrote:
>    ...
>> In my case of have done os.listdir() on two directories. I want to see
>> what files are in directory A that are not in directory B.
> 
> So why would you care about WHERE, in the listdir of B, are to be found
> the files that are in A but not B?!  You should call .index only if you
> CARE about the position.
> 
> def inAnotB(A, B):
>     inA = os.listdir(A)
>     inBs = set(os.listdir(B))
>     return [f for f in inA if f not in inBs]
> 
> is the "one obvious way to do it" (the set(...) is just a simple and
> powerful optimization -- checking membership in a set is roughly O(1),
> while checking membership in a list of N items is O(N)...).

And what is the order of passing a list into a set? O(N)+?

> 
> 
> Alex



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Aug 19 17:38:08 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 19 Aug 2007 23:38:08 +0200
Subject: How to make a module function visible only inside the module?
References: <1187484334.091530.90420@m37g2000prh.googlegroups.com>
	<1i32pg7.b0y3h92vjygwN%raims@dot.com>
	<1187488017.198905.242610@j4g2000prf.googlegroups.com>
	<5iqsbtF3qanv6U3@mid.individual.net>
	<1187541342.251682.307350@i13g2000prf.googlegroups.com>
Message-ID: <5irri0F3r2m8aU4@mid.individual.net>

beginner wrote:

> I just started learning the language. I wasn't aware of the PEP.

Mh, two postings before Lawrence already mentioned it.

I suggest looking through the BeginnersGuide.

http://wiki.python.org/moin/BeginnersGuide

Regards,


Bj?rn

-- 
BOFH excuse #203:

Write-only-memory subsystem too slow for this machine. Contact your
local dealer.



From http  Sun Aug 19 13:25:24 2007
From: http (Paul Rubin)
Date: 19 Aug 2007 10:25:24 -0700
Subject: Development for dual core machine
References: <1187515287.226791.186700@j4g2000prf.googlegroups.com>
Message-ID: <7x3ayfsagr.fsf@ruckus.brouhaha.com>

Andy <fukazawa at gmail.com> writes:
> >From what I read, I think that simply by making the package run in
> several separate processes (web server, database server, Python
> interpreter, etc.), and/or using multiple threads (which I will
> anyway) the package should be able to use multiple CPUs.

Python threading doesn't support multiple CPU's because of the GIL.

One approach to using your multiple cores is to embed a Python
interpreter into a web server that runs in multiple processes,
e.g. mod_python under Apache.

Another is write your application as a separate process (e.g.  as an
FastCGI), then run multiple instances of it, connected to a concurrent
web server.  For what I'm currently doing, we're using lighthttpd as
the http server and flup to connect to a set of Python FCGI's.

For that matter, if your machine is just dual core, maybe it's ok to
just run a single Python process, figuring that will run on one core
and your database/httpd will run on the other one.  However, you
should figure the dual core situation won't last.  Dual socket
motherboards are fairly cheap these days, so we have a number of
4-core machines (two AMD dual core cpu's); Intel is already shipping
quad core cpu's, so that puts 8 cores in a dual socket board (you can
already buy Macintoshes configured that way).  Higher end server
motherboards have 4 sockets, so you have to expect that 16-core
servers will be common pretty soon.

So if you're working on a cpu-intensive application it's worth your
while figuring out how to parallelize it.

Note that the most careful concurrency stuff probably is in the
database.  Serious ones already know how to use multiple CPU's.


From rainwatching at gmail.com  Mon Aug  6 07:42:08 2007
From: rainwatching at gmail.com (=?iso-8859-1?q?S=F6nmez_Kartal?=)
Date: Mon, 06 Aug 2007 11:42:08 -0000
Subject: Best programs written completly in Python
In-Reply-To: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
Message-ID: <1186400528.710100.310520@g4g2000hsf.googlegroups.com>

On 5 A ustos, 13:14, Franz Steinh?usler <franz.steinhaeus... at gmx.at>
wrote:
> Hello NG,
>
> wWhat are the best programs in your opinion, written entirly
> in pyhton, divided into categories like:
> a) Games
> b) Utilities/System
> c) Office
> d) Web/Newsreader/Mail/Browser
> ...
>
> I don't want to start a long thread, if a site of such
> an discussion already exists, a link will be enough.
>
> Many thanks in advance!
>
> --
> Franz Steinhaeusler

Well, I don't want to make an advertisement but Pardus project's (a
GNU/Linux distro) specific projects are completely written in Python.
You can check it out at http://www.pardus.org.tr/eng/index.html



From rbriski at gmail.com  Tue Aug  7 12:56:32 2007
From: rbriski at gmail.com (Bob B.)
Date: Tue, 07 Aug 2007 09:56:32 -0700
Subject: Adding a list of descriptors to a class
In-Reply-To: <kd2dnd75bORePyXbnZ2dnUVZ_jSdnZ2d@comcast.com>
References: <1186503932.110835.293640@x40g2000prg.googlegroups.com>
	<kd2dnd75bORePyXbnZ2dnUVZ_jSdnZ2d@comcast.com>
Message-ID: <1186505792.664531.246140@d30g2000prg.googlegroups.com>

> Probably the simplest thing is to just add the attributes after the
> class body, e.g.::
>
>      >>> class MyClass(object):
>      ...     pass
>      ...
>      >>> for attr in ['attr1', 'attr2']:
>      ...     setattr(MyClass, attr, MyDesc(attr))
>      ...
>      >>> c = MyClass()
>      >>> c.attr1
>      'blah'
>

That worked.  Thanks.




From tommy.nordgren at comhem.se  Sat Aug 18 22:10:20 2007
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Sun, 19 Aug 2007 04:10:20 +0200
Subject: Parser Generator?
In-Reply-To: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
Message-ID: <CAEE15CC-5E4C-400B-9AF6-06E8981A3499@comhem.se>


On 19 aug 2007, at 00.22, Jack wrote:

> Hi all, I need to do syntax parsing of simple naturual languages,
> for example, "weather of London" or "what is the time", simple
> things like these, with Unicode support in the syntax.
>
> In Java, there are JavaCC, Antlr, etc. I wonder what people use
> in Python? Antlr also has Python support but I'm not sure how good
> it is. Comments/hints are welcome.
>
>
> --  
> http://mail.python.org/mailman/listinfo/python-list
	Antlr can generate Python code.
However, I don't think a parser generator is suitable for generating  
natural language parsers.
They are intended to generate code for computer language parsers.
	However, for examples on parsing imperative English sentences, I  
suggest taking a look
at the class library for TADS 3 (Text Adventure Development System)  
<http://www.tads.org>
	The lanuge has a syntax reminding of c++ and Java.
-----------------------------------------------------
An astronomer to a colleague:
-I can't understsnad how you can go to the brothel as often as you  
do. Not only is it a filthy habit, but it must cost a lot of money too.
-Thats no problem. I've got a big government grant for the study of  
black holes.
Tommy Nordgren
tommy.nordgren at comhem.se





From bdesth.quelquechose at free.quelquepart.fr  Fri Aug 24 09:42:08 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 24 Aug 2007 15:42:08 +0200
Subject: some problems with mod_python
In-Reply-To: <46d337a1$0$422$426a74cc@news.free.fr>
References: <1188245587.129794.258250@z24g2000prh.googlegroups.com>
	<46d337a1$0$422$426a74cc@news.free.fr>
Message-ID: <46d33842$0$422$426a74cc@news.free.fr>

Bruno Desthuilliers a ?crit :
> Johan a ?crit :
> 
>> Hi
>>
>> I have installed and tested this on centos, fedora and freebsd all
>> give the same problem so I guess I missed some steps.
>>
>> I have compiled bot apache (2.2.4) and mod_python (3.3.1) according to
>> the docs and no problem with this.
>> But when I have made everything about testing mod_python an browse to
>> http://server/test and there expecting to see "Hello world" I instead
>> get an index of contents in this directory. If I go to  
>> http://server/test/mptest.py
>> it works. No errors in any log either.
>>
>> What Have I missed?
> 
> 
> The difference between AddHandler and SetHandler in apache's conf.
> 
And while we're at it, you also missed the fact that mod_python has it's 
own mailing list, where you're more likely to get answers from 
mod_python experts (strange as it might be, most of Python web 
development doesn't rely on Apache nor mod_python...)


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Aug 16 05:40:54 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 16 Aug 2007 11:40:54 +0200
Subject: Coroutines and argument tupling
References: <mailman.2032.1187207899.22759.python-list@python.org>
	<5ih63mF3pvnt7U1@mid.individual.net>
	<87k5rwo24e.fsf@seneca.iss.local>
Message-ID: <5iikd6F3pfrhrU1@mid.individual.net>

Marshall T. Vandegrift wrote:
> Without the decorator that becomes:
> 
>     gen = nextn(2)
>     print gen.next()  # => [0, 1]
>     print gen.send(3) # => [2, 3, 4]
>     print gen.send(1) # => [5]
> 
> The former is just that smidgen nicer, and allows you to continue
> to make use of argument defaults and varadic arguments if so
> desired.

The solution I'd use is a decorator that calls next automatically
one time after instantiation. Then you can use send normally, and
don't have to care about any initial parameters, which makes the
code clearer (initial parameters should be used for setup purposes,
but not for the first iteration, IMHO). It'd look like this (from
PEP 342, http://www.python.org/dev/peps/pep-0342/):

def consumer(func):
    def wrapper(*args,**kw):
        gen = func(*args, **kw)
        gen.next()
        return gen
    wrapper.__name__ = func.__name__
    wrapper.__dict__ = func.__dict__
    wrapper.__doc__  = func.__doc__
    return wrapper

@consumer
def nextn():
    ...

gen = nextn()
print gen.send(2) # => [0, 1]
print gen.send(3) # => [2, 3, 4]
print gen.send(1) # => [5]

Regards,


Bj?rn

-- 
BOFH excuse #60:

system has been recalled



From horpner at yahoo.com  Thu Aug  9 13:50:47 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 09 Aug 2007 17:50:47 GMT
Subject: Puzzled by "is"
References: <mailman.1804.1186681137.22759.python-list@python.org>
Message-ID: <slrnfbml7g.274.horpner@FIAD06.norwich.edu>

On 2007-08-09, Dick Moores <rdm at rcblue.com> wrote:
> >>> () is ()
> True
> >>> (1,) is (1,)
> False
>
> Why?

>From _Python Reference Manual_: 5.2.4 List displays:

  An empty pair of parentheses yields an empty tuple object.
  Since tuples are immutable, the rules for literals apply (i.e.,
  two occurrences of the empty tuple may or may not yield the
  same object). 

-- 
Neil Cerutti


From dhwild at talktalk.net  Fri Aug 31 15:57:40 2007
From: dhwild at talktalk.net (David H Wild)
Date: Fri, 31 Aug 2007 20:57:40 +0100
Subject: strings (dollar.cents) into floats
References: <mailman.140.1188483282.28954.python-list@python.org>
	<877incd20i.fsf@benfinney.id.au>
	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
	<1188575044.874256.42960@50g2000hsm.googlegroups.com>
	<fb9eas$tnc$1@sea.gmane.org>
	<mailman.218.1188577696.28954.python-list@python.org>
	<46d84a47$0$1346$834e42db@reader.greatnowhere.com>
	<1188586725.667740.255700@o80g2000hse.googlegroups.com>
Message-ID: <46d87479$0$1348$834e42db@reader.greatnowhere.com>

In article <1188586725.667740.255700 at o80g2000hse.googlegroups.com>,
   MRAB <google at mrabarnett.plus.com> wrote:
> > When I worked on the British Railways National Payroll system, about
> > 35 years ago, we, in common with many large users, wrote our system to
> > deal with integer amounts of pennies, and converted to pounds,
> > shillings and pence in the output part of the system.
> >
> So you never handled halfpennies?

Halfpennies had disappeared from the BR accounting system before the first
use of computers for accounting work.

-- 
David Wild using RISC OS on broadband
www.davidhwild.me.uk


From sturlamolden at yahoo.no  Fri Aug 17 17:40:27 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: Fri, 17 Aug 2007 14:40:27 -0700
Subject: Can python threads take advantage of use dual core ?
In-Reply-To: <1187366443.621295.97020@e9g2000prf.googlegroups.com>
References: <1187366443.621295.97020@e9g2000prf.googlegroups.com>
Message-ID: <1187386827.073926.184770@50g2000hsm.googlegroups.com>

On Aug 17, 6:00 pm, nikhilketkar <nikhilket... at gmail.com> wrote:


> What are the implications of the Global Interpreter Lock in Python ?

This is asked every second week or so.

The GIL is similar to the Big Kernel Lock (BKL) use to support SMPs in
older versions of the Linux kernel. The GIL prevents the Python
interpreter to be active in more than one thread at a time.

If you have a single CPU with a single core, the GIL has no
consequence what so ever.

If you have multiple CPUs and/or multiple cores, the GIL has the
consequence that you can forget about SMP scalability using Python
threads. SMP scalability require more fine grained object locking,
which is what the Java and .NET runtimes do, as well as current
versions of the Linux kernel. Note that IronPython and Jython use fine
grained locking instead of a GIL.

> Does this mean that Python threads cannot exploit a dual core
> processor and the only advantage of using threads is in that
> computation and IO-bound operations can continue in parallel ?


The Python standard library releases the GIL in read/write operations
for e.g. files and sockets. This can be combined with threads to allow
multiple IO operations to continue in parallel. The GIL has no or very
little significance for IO-bound scalability in Python.

CPU-bound tasks are a different game. This is where the GIL matter.
You must either release the GIL or use multiple processes for
exploiting multiple processors in an SMP computer with Python. The GIL
can be released explicitely in C extension code. f2py and ctypes can
also release the GIL.

Note that you would NOT use threads for speeding up CPU-bound
operations, even when programming in C or Fortran. Threads are neither
the only nor the preferred way to exploit multicore CPUs for CPU-bound
tasks. Instead of threads, use either an MPI library or OpenMP
compiler pragmas. You can use MPI directly from Python (e.g. mpi4py),
or you can use OpenMP pragmas in C or Fortran code which you call
using ctypes or f2py.

Summary:

Use Python threads if you need to run IO operations in parallel.
Do not use Python threads if you need to run computations in parallel.



Regards,
Sturla Molden





From kyosohma at gmail.com  Sat Aug 18 09:35:03 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Sat, 18 Aug 2007 13:35:03 -0000
Subject: wxPython with directpython
In-Reply-To: <1187442509.620003.316770@r34g2000hsd.googlegroups.com>
References: <1187442509.620003.316770@r34g2000hsd.googlegroups.com>
Message-ID: <1187444103.381907.103240@m37g2000prh.googlegroups.com>

On Aug 18, 8:08 am, vedrandeko... at v-programs.com wrote:
> Hello,
>
> I'am using  DirectPython 0.8, wxPython 2.8.4.2 (ansi) for Python 2.5
> and I'm running it on windows XP SP2.
> When I run my wx program, and this program run directpython code:
>
> (I run it under wx frame)
>
> example code:
>
> import d3dx
> fr=d3dx.Frame(unicode("My frame"))
> fr.mainloop()
>
> .....this code run some d3dx frame, and when I close this d3dx frame
> it close my whole program ( and wx frame).
>
> Regards,
> Vedran

You need to post some more code, preferably the function that calls
the directx stuff. And how do you catch the close event? It sounds
like you've got multiple objects bound to it which causes the entire
program to close. You might consider running the directx stuff in a
separate thread.

Mike



From steve at holdenweb.com  Fri Aug 31 12:06:49 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 12:06:49 -0400
Subject: strings (dollar.cents) into floats
In-Reply-To: <1188575044.874256.42960@50g2000hsm.googlegroups.com>
References: <mailman.140.1188483282.28954.python-list@python.org>	<877incd20i.fsf@benfinney.id.au>	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
	<1188575044.874256.42960@50g2000hsm.googlegroups.com>
Message-ID: <fb9eas$tnc$1@sea.gmane.org>

sturlamolden wrote:
> On 31 Aug, 02:12, Wildemar Wildenburger
> <lasses_w... at klapptsowieso.net> wrote:
> 
>> I've heard (ok, read) that several times now and I understand the
>> argument. But what use is there for floats, then? When is it OK to use them?
> 
> There are fractions that can be exactly represented by floats that
> cannot be exactly represented by decimals. 

Would you care to give an example?

> There are fractions that
> can be exactly represented by decimals that cannot be exactly
> represented by floats.
> 
> Which one is better? Which do we prefer?
> 
> What a float cannot do is to represent a decimal fractional number
> (e.g. 1.1) exactly. If we need that, we cannot use floats. A notable
> example is monetary computations, it covers 99% of the use for decimal
> numbers in computers. For this reason, we should never use floats to
> add 10 cents to a dollar. The use of decimals for monetary
> calculations is mandatory.
> 
That last sentence is patent nonsense, and completely untrue. Many 
satisfactory financial applications have been written using only 
floating-point arithmetic. Indeed I believe the accountant's Swiss army 
knife, the Excel spreadsheet, uses floating-point numbers exclusively.

What you say about floating-point have speed advantages is true, but you 
go too far in claiming that decimal arithmetic is mandatory for monetary 
calculations. That's about as sensible as saying that base 12 and base 
20 arithmetic units were required to calculate in pounds, shillings and 
pence.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From python at jayloden.com  Wed Aug  1 09:18:31 2007
From: python at jayloden.com (Jay Loden)
Date: Wed, 01 Aug 2007 09:18:31 -0400
Subject: access the name of my method inside it
In-Reply-To: <1185973639.234450.305690@g12g2000prg.googlegroups.com>
References: <1185959202.302467.276080@x35g2000prf.googlegroups.com>	<5hb1ebF3inuf2U6@mid.uni-berlin.de>
	<1185973639.234450.305690@g12g2000prg.googlegroups.com>
Message-ID: <46B08827.9010109@jayloden.com>

james_027 wrote:
> Hi,
> 
> On Aug 1, 5:18 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Wed, 01 Aug 2007 09:06:42 +0000, james_027 wrote:
>>> for example I have this method
>>> def my_method():
>>>     # do something
>>>     # how do I get the name of this method which is my_method here?
>> Why do you need this?  There are ways but those are not really good for
>> production code.
>>
> 
> I am going to use this in Django. I am trying to implement a
> permission here, where in the database store the methods that the user
> are allowed to execute. for example if the method is def
> create_event(): the method will look for create_event in the database
> to see if it allow to be execute.

This might help, I used it for a similar need I had in the past where I needed a method to know the name it was called with

class TestClass:
        def __init__(self):
                pass

        def __getattr__(self, name):
                try:
                        return getattr(self.__class__, name)
                except AttributeError:
                        return functools.partial(self.foo, name)

        def foo(self, name, **args): 
                print name
                for i in args:
                        print " %s=%s" % (i, args[i])


From edloper at gradient.cis.upenn.edu  Tue Aug  7 04:58:06 2007
From: edloper at gradient.cis.upenn.edu (Edward Loper)
Date: Tue, 07 Aug 2007 03:58:06 -0500
Subject: mmm-mode, python-mode and doctest-mode?
Message-ID: <46B8341E.2090805@gradient.cis.upenn.edu>

[John J Lee]
> Is it possible to get doctest-mode to work with mmm-mode and python-mode 
> nicely so that docstrings containing doctests are editable in 
> doctest-mode?

I recently released a new version of doctest-mode [1], and I came across 
your email [2] (it was on the first page of google hits for 
"doctest-mode").  So I decided to have a go at getting doctest-mode to 
play nicely with mmm-mode.  The result is available here:

https://python-mode.svn.sf.net/svnroot/python-mode/trunk/python-mode/doctest-mode.el

I still consider it alpha code (the version that's available for 
download on the official doctest-mode webpage [3] doesn't include the 
mmm-mode features), but it works pretty well for me.  If you want to 
give it a spin, let me know what you think.  The following should load 
everything you need:

(autoload 'doctest-mode "doctest-mode" "doctest mode" t)
(autoload 'doctest-register-mmm-classes "doctest-mode")
(doctest-register-mmm-classes t t)

It defines 2 classes.  Quoting from the docstring for doctest-register- 
mmm-classes:

> `doctest-docstring'
> 
>     Used to edit docstrings containing doctest examples in python-
>     mode.  Docstring submode regions start and end with triple-quoted
>     strings (\"\"\").  In order to avoid confusing start-string
>     markers and end-string markers, all triple-quote strings in the
>     buffer are treated as submode regions (even if they're not
>     actually docstrings).  Use (C-c % C-d) to insert a new doctest-
>     docstring region.  When `doctest-execute' (C-c C-c) is called
>     inside a doctest-docstring region, it executes just the current
>     docstring.  The globals for this execution are constructed by
>     importing the current buffer's contents in Python.
> 
> `doctest-example'
> 
>     Used to edit doctest examples in text-editing modes, such as
>     `rst-mode' or `text-mode'.  Docstring submode regions start with
>     optionally indented prompts (>>>) and end with blank lines.  Use
>     (C-c % C-e) to insert a new doctest-example region.  When
>     `doctest-execute' (C-c C-c) is called inside a doctest-example
>     region, it executes all examples in the buffer.

Take care,
-Edward

[1] doctest-mode 0.4 announcement:
 
http://mail.python.org/pipermail/python-announce-list/2007-August/006038.html

[2] email re mmm-mode:
     http://mail.python.org/pipermail/python-list/2005-November/354482.html

[3] doctest-mode homepage:
     http://www.cis.upenn.edu/~edloper/projects/doctestmode/

[4] doctest-mode walkthrough:
     http://tinyurl.com/25bljc

[5] doctest-mode subversion:
 
https://python-mode.svn.sf.net/svnroot/python-mode/trunk/python-mode/doctest-mode.el




From gigs at hi.t-com.hr  Wed Aug 29 17:05:38 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Wed, 29 Aug 2007 23:05:38 +0200
Subject: cgi
In-Reply-To: <46d5daa7$0$36441$4fafbaef@reader5.news.tin.it>
References: <fb4a57$ojf$1@ss408.t-com.hr>	<46d5c01b$0$36438$4fafbaef@reader5.news.tin.it>	<fb4gpa$bb0$1@ss408.t-com.hr>
	<46d5daa7$0$36441$4fafbaef@reader5.news.tin.it>
Message-ID: <fb4n33$pvd$1@ss408.t-com.hr>

Fabio Z Tessitore wrote:
> Are you sure your script is in the right dir?
> 
> On my home computer, php script will work in /var/www but my python 
> script need an other dir to work properly (i don't remember which now ;-))
> 
> bye
> 
i think that it is in right dir because other script in same dir work.
dir is: cgi-bin


From google at mrabarnett.plus.com  Thu Aug 16 15:46:21 2007
From: google at mrabarnett.plus.com (MRAB)
Date: Thu, 16 Aug 2007 12:46:21 -0700
Subject: A problem with Time
In-Reply-To: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
References: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <1187293581.631314.243650@a39g2000hsc.googlegroups.com>

On Aug 16, 4:30 pm, "special_dragonfly" <Domi... at PLEASEASK.co.uk>
wrote:
> Hello,
>
> I need to return the date yesterday in the form DDMMYYYY. I looked through
> the modules: time, datetime and calendar but can't find anything that leaps
> out at me.
>
> The problem I'm having is that although I can use time.localtime and get a
> tuple of the year, month, day and so forth, I don't believe I can just minus
> 1 from the day, because I don't think it's cyclic, also, I can't see the
> date being linked in with the month.
>
> So is there any way of getting yesterdays date?
>
As well as the other replies, this also works (as far as I can tell!):

import time
today = time.localtime()
yesterday = today[ : 2] + (today[2] - 1, ) + today[3 : ]
yesterday = time.localtime(time.mktime(yesterday))



From XX.XmcX at XX.XmclaveauX.com  Fri Aug 31 15:29:46 2007
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Fri, 31 Aug 2007 21:29:46 +0200
Subject: Horace Lives!
References: <1188588444.816874.22000@r29g2000hsg.googlegroups.com>
Message-ID: <mn.fd097d783fa7b653.46195@XX.XmclaveauX.com>

M?galo!

-- 
@-salutations

Michel Claveau




From steve at holdenweb.com  Wed Aug  8 20:02:33 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Aug 2007 20:02:33 -0400
Subject: some import / namespace questions
In-Reply-To: <46BA567E.5060503@gmail.com>
References: <mailman.1745.1186585520.22759.python-list@python.org>	<5hu7kdF3md0abU4@mid.uni-berlin.de>
	<46BA567E.5060503@gmail.com>
Message-ID: <f9dlim$q4t$1@sea.gmane.org>

stef mientki wrote:
> Marc 'BlackJack' Rintsch wrote:
>> On Wed, 08 Aug 2007 17:11:19 +0200, stef mientki wrote:
>>
>>   
>>> Now it's not possible to import in the existing modules the main plugin, 
>>> like
>>>    from Main_User import *
>>> because this will start the infinite loop.
>>>     
>> Which means there's code at the module level. 
> yes
>>  Tell the users to put that
>> into a function, then you can import the module without executing this
>> main loop.
>>   
> ok, I'll do that for the user (the user writes in another language),
> and indeed it works,
> but has one disadavantage ... see below
>> And don't do a * import because your users might use names that the
>> importing module uses already and which would get replaced by the * import.
>>
>>   
> Yes that's a principal problem with this program, for which I've no 
> (simple) solution.
> I'm simulating a microprocessor language here, where "globality"  is an 
> essential part of the language.
> So I'll have to stick to import *, (although I'm aware it's not a good 
> programming method, especially in user plug-ins)
> and now the problem is that I get a warning that import * is only 
> allowed at the module level :-(
> But despite the warning it's still working. ;-)
> 
If you read the docs on the warnings module you should be able to 
suppress that message.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From exscape at gmail.com  Thu Aug  2 15:48:06 2007
From: exscape at gmail.com (exscape at gmail.com)
Date: Thu, 02 Aug 2007 12:48:06 -0700
Subject: Best way to capture output from an exec'ed (or such) script?
Message-ID: <1186084086.212050.264270@q3g2000prf.googlegroups.com>

Hey everyone,
I'm writing a tiny web server, mostly to learn - security and such is
a non-issue, but learning how to make things secure is of course nice
too. To be clear - I will most likely not even use it myself.

In any case. I've added some minor scripting support, so that you can
write dynamic pages in Python. To do this, I use execfile(), and pass
the script a dictionary with some basic variables. The script then
sets a "ret" variable that's sent back to the browser. That's some
major ugliness right there! If I do a "print" inside the script, then
it'll end up on the server console. I want it to end up in the web
browser.

How would I accomplish this, i.e. redirect the standard output to
somewhere else, such as a variable in the calling script? If it's not
easy (as in, quite trivial) just say so. I've been thinking about
popen(2,3,4) but that's almost as ugly, if not even worse, than the
current "solution".

Thanks in advance.



From james.b.looney at lmco.com  Tue Aug 21 11:12:26 2007
From: james.b.looney at lmco.com (Looney, James B)
Date: Tue, 21 Aug 2007 09:12:26 -0600
Subject: Manipulating raw data in Python
Message-ID: <BAA666C1E230E143BB9E839ED55EF1940665B96A@emss02m12.us.lmco.com>

How do I get access to a data buffer in Python so that I can directly
view/modify the data?  My buffer size is 256 (for this specific case)
bytes.  Most of the time, I access want to access that data in 4-byte
chunks, sometimes in single byte chunks.  How do I go about doing so?

I'm certain someone's come across (and has probably asked this question
a few times).  I've tried various searches, and I'm either missing the
obvious, or am not using the right key words to get what I'm looking
for.  I mostly get back results about audio, files, etc.  In my case,
I'm using an HDLC protocol.

A little background:
I've got a socket connection.  On the server side is C++ code.  On the
client (Python) side, I have a SWIG-ified C++ extension.  The extension
is my messaging API, so that I can interact with the socket in a known
manner on both sides of the connection.  In C++, I'd usually just use a
method like "char *getBuffer()". However, Python seems to want to treat
this as a string even though it really isn't.  I usually only get a few
bytes before Python encounters data which looks like a NULL.

Any help is appreciated.
Thanks,
-JB
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From sreerama.v at silver-software.com  Tue Aug 14 09:45:59 2007
From: sreerama.v at silver-software.com (Sreerama Veeranna)
Date: Tue, 14 Aug 2007 14:45:59 +0100
Subject: access  error
Message-ID: <000501c7de79$723cba20$6800a8c0@SSWS0104>

Hi all,
  
Sometimes, python gets crash by giving access error sometimes doesn?t.
Why is this?
 
 
Regards
Sreerama V

[ The information contained in this e-mail is confidential and is intended for the named recipient only. If you are not the named recipient, please notify us by telephone on +44 (0)1666 580 000 immediately, destroy the message and delete it from your computer. Silver Software has taken every reasonable precaution to ensure that any attachment to this e-mail has been checked for viruses. However, we cannot accept liability for any damage sustained as a result of any such software viruses and advise you to carry out your own virus check before opening any attachment. Furthermore, we do not accept responsibility for any change made to this message after it was sent by the sender.]
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From Afro.Systems at gmail.com  Tue Aug 14 07:58:39 2007
From: Afro.Systems at gmail.com (Tzury)
Date: Tue, 14 Aug 2007 11:58:39 -0000
Subject: ctypes windll question
In-Reply-To: <1187084704.869276.317030@r34g2000hsd.googlegroups.com>
References: <1187084704.869276.317030@r34g2000hsd.googlegroups.com>
Message-ID: <1187092719.861765.232260@g4g2000hsf.googlegroups.com>

I discovered pywin32-210.win32-py2.5 package which does all the work
for me.

Open Software world is a great place to live by....

On Aug 14, 12:45 pm, Tzury <Afro.Syst... at gmail.com> wrote:
> I followed the tutorial about ctypes and I still cannot figure out how
> to call a method of a calss within the dll.
>
> For example:
> a dll named 'foo' contain a class named 'bar' which expose a method
> named 'baz'.
>
> if I either do:
>
> mydll = windll.foo
> mycls = mydll.bar
>
> or
> mycls = windll.foo.bar
>
> or
> mycls = windll.foo.bar()
>
> I get an erros: "function 'bar' not found " which is right, since bar
> is a class and not a function. However, I still need to  create an
> instance of this inner class (bar) so I can access its public method
> (baz).
>
> I cannot find anywhere instructions for that.




From pablo.yabo at gmail.com  Tue Aug 28 09:34:57 2007
From: pablo.yabo at gmail.com (Pablo Yabo)
Date: Tue, 28 Aug 2007 10:34:57 -0300
Subject: C++ Binding with Threads
In-Reply-To: <db6698600708131042h79d3463ekce8c4099f9b0c38f@mail.gmail.com>
References: <db6698600708131042h79d3463ekce8c4099f9b0c38f@mail.gmail.com>
Message-ID: <db6698600708280634s400b8eb1l11a1e0a6d88bdc63@mail.gmail.com>

I've found a workaround for me project that I'll share.
The solution is to release the interpreter lock when a function of my wapper
is called, I mean from Python a function of C++ is called so I released the
interpreter lock and take it before returning to Python.
It's important to provide Sleep functions in your C++ code. Otherwise,
multi-threading will not work at all. If most of the work is done in your
C++ code, using this workaround will solve the issue.

To make it easier I've wrote a class to create an instance at the beginning
of each wrapped function.

Here is the constructor / destructor:

PythonAutoLock::PythonAutoLock()
{
    PythonMgr *mgr = PythonMgr::instance();

    _state = PyThreadState_Get();

    PyThreadState_Swap(NULL);
    PyEval_ReleaseLock();
}

PythonAutoLock::~PythonAutoLock()
{
    PythonMgr *mgr = PythonMgr::instance();

    PyEval_AcquireLock();
    PyThreadState_Swap(_state);
}


Pablo Yabo
--
http://www.nektra.com


On 8/13/07, Pablo Yabo <pablo.yabo at gmail.com> wrote:
>
> Hello,
>
> I want to embed Python in an application and use an API of the application
> from Python.
> The application uses a library that creates several threads and I the
> users of the application will write Python scripts handling this events.
>
> The problem is that I having problems with threads. I saw that I have to
> PyEval_InitThreads and then PyThreadState_New and PyThreadState_Swap from
> the new thread but this way to solve the problem doesn't work for me because
> I need to let 2 or more threads run at the SAME time.
> The interpreter lock doesn't let them run at the same time so I'm looking
> for another solution. I saw Py_NewInterpreter and I tried to use it but it
> doesn't work if I don't keep the lock.
>
> Can anyone help me to solve this issue or tell me 'Forget it!'?
>
>
> Thanks on advance,
> Pablo Yabo
> --
> http://www.nektra.com
>
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From iclark at mail.ewu.edu  Wed Aug  1 17:52:40 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Wed, 01 Aug 2007 14:52:40 -0700
Subject: Awkward format string
In-Reply-To: <1186003719.783219.104200@r34g2000hsd.googlegroups.com>
References: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
	<1186003719.783219.104200@r34g2000hsd.googlegroups.com>
Message-ID: <f8qvb8$mlt$1@sea.gmane.org>

Gerard Flanagan wrote:
> (snip)
>
> def tostring(data):
>     return tuple(strftime(x) for x in data[:2]) + data[2:]
> 

Hrmm, not sure that having a function named tostring() that returns a 
tuple is the best idea. ;)

Ian



From ernst.karner at gmail.com  Fri Aug  3 04:34:33 2007
From: ernst.karner at gmail.com (diego)
Date: Fri, 03 Aug 2007 01:34:33 -0700
Subject: suppress pop up windwo
Message-ID: <1186130073.003902.17260@o61g2000hsh.googlegroups.com>

I'm automating the generation of PDF out of Excel sheets through
win32com.

I nearly accomplished everything I wanted, but one problem is still
left:
when I calling the print job through following code:

xl.Selection.PrintOut(Copies=1,Collate=True)

then a window pops up, where I have to input the name of the pdf I
want to generate.
Is there way to pass this filename to this window?



(I'm using 'Jaws PDF Creator" as printer.)

Thanks in advance for your help!

Diego



From grante at visi.com  Thu Aug 23 10:03:52 2007
From: grante at visi.com (Grant Edwards)
Date: Thu, 23 Aug 2007 14:03:52 -0000
Subject: Socket recv(1) seems to block instead of returning end of file.
References: <mailman.164.1187862959.32294.python-list@python.org>
Message-ID: <13cr4u8mimniub4@corp.supernews.com>

On 2007-08-23, Hendrik van Rooyen <mail at microcorp.co.za> wrote:

> While doing a netstring implementation I noticed that if you
> build a record up using socket's recv(1), then when you close
> the remote end down, the recv(1) hangs,

I don't see that behavior running 2.4 on Gentoo.

> despite having a short time out of 0.1 set.

What time out?  A socket's recv method doesn't do timeouts.

> If however, you try to receive more than one char, (I tested
> with 3, did not try 2), then when you shut the remote end down
> you do not get a time out, but an empty string - the normal
> end of file, I suppose.
>
> Has anybody else seen this behaviour?

No.  recv(1) works fine for me (Python 2.4 under Gentoo).
Perhaps you could post a minimal example that doesn't work for
you?

------------------------------------------------------------------------
#!/usr/bin/python

#reader
import socket

HOST = ''                 # Symbolic name meaning the local host
PORT = 8765               # Arbitrary non-privileged port
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(1)
conn, addr = s.accept()
print 'Connected by', addr
while 1:
    data = conn.recv(1)
    print "rx:",len(data)
    if not data: break
conn.close()
------------------------------------------------------------------------


------------------------------------------------------------------------
#!/usr/bin/python

# writer
import socket,random

HOST = ''                 # Symbolic name meaning the local host
PORT = 8765               # Arbitrary non-privileged port
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
print 'Connected to',((HOST,PORT))
for i in range(10):
    data = "abcdefghijklmnopqrstuvwxyz"[:random.randint(1,20)]
    s.send(data)
    print "tx:",len(data)
conn.close()
------------------------------------------------------------------------

-- 
Grant Edwards                   grante             Yow! Loni Anderson's hair
                                  at               should be LEGALIZED!!
                               visi.com            


From sean at buildingonline.com  Fri Aug 31 11:43:30 2007
From: sean at buildingonline.com (sberry)
Date: Fri, 31 Aug 2007 08:43:30 -0700
Subject: Question involving a Python app...
In-Reply-To: <1188573903.389912.93530@r29g2000hsg.googlegroups.com>
References: <1188571968.529938.55770@i38g2000prf.googlegroups.com>
	<1188573903.389912.93530@r29g2000hsg.googlegroups.com>
Message-ID: <1188575010.526791.156790@x35g2000prf.googlegroups.com>

On Aug 31, 8:25 am, kyoso... at gmail.com wrote:
> On Aug 31, 9:52 am, sberry <s... at buildingonline.com> wrote:
>
>
>
> > I am a Flash developer (also a Python dev) and I use an editor called
> > SEPY Actionscript Editor.  The latest release version does not support
> > Flash CS3, so I downloaded the source from subversion, edited it, and
> > recompiled to get a version that worked with CS3.  Right now, in order
> > to run the program I have to do a command line "python main.pyw."
>
> > The question now is this:
> > Others in my company would like to use the version I have compiled
> > without installing Python, wxPython, 4suite, antlr, and a whole bunch
> > of other Python libs.  So, how do I create an executable (on Windows)
> > to install the program so it will run without the aforementioned
> > framework being installed?
>
> > I know this isn't really an entirely "Pythonic" question, but this
> > group has always been very helpful in the past.
>
> > Thanks
>
> I find GUI2exe to be very easy to use. It's just py2exe with a GUI
> frontend. Seehttp://xoomer.alice.it/infinity77/main/GUI2Exe.htmlfor
> more information.
>
> Mike

Thanks for the help... and for giving it so quickly - I can always
count on this group.

Problems though... I was successful at creating the dist dir with my
executable file, but when I try to run it I get an error.log file with
the following:

<type 'exceptions.IOError'>
[Errno 9] Bad file descriptor
[53]: main.pyw
[29]: SEPY.pyo
[16]: core\__init__.pyo
[5]: core\documents\__init__.pyo
[11]: core\documents\compare.pyo
[15]: core\documents\editor.pyo
[13]: core\io\__init__.pyo
[6]: core\io\xml\__init__.pyo
[11]: core\io\xml\autoformat.pyo
[29]: Ft\Xml\Domlette.pyo
[355]: Ft\Xml\InputSource.pyo
[584]: Ft\Xml\Catalog.pyo
[62]: warnings.pyo
[126]: warnings.pyo
[122]: Ft\__init__.pyo
------------------------

Can anyone help explain what I am missing here?

THANKS!



From aleax at mac.com  Wed Aug 15 12:02:10 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 15 Aug 2007 09:02:10 -0700
Subject: Opinions about this new Python book?
References: <mailman.1957.1187093157.22759.python-list@python.org>
	<1187096231.194685.86030@m37g2000prh.googlegroups.com>
	<20070814154913.D8C3C1E400A@bag.python.org>
	<8a6b8e350708141020q495b22der4c362ee3df618d82@mail.gmail.com>
	<mailman.1979.1187113641.22759.python-list@python.org>
	<1187117012.088495.247890@q4g2000prc.googlegroups.com>
	<1187191950.037749.8050@z24g2000prh.googlegroups.com>
	<slrnfc6884.22k.horpner@FIAD06.norwich.edu>
Message-ID: <1i2vqa8.1vfbp9yvtht9kN%aleax@mac.com>

Neil Cerutti <horpner at yahoo.com> wrote:

> On 2007-08-15, kyosohma at gmail.com <kyosohma at gmail.com> wrote:
> > For some reason, the author makes the claim that the term
> > "Predicate" is "bandied about quite a bit in the literature" of
> > Python. I have 17 or so Python books and I don't think I've
> > ever seen this used in conjunction with Python...or in any of
> > the docs I've skimmed. What the!?
> 
> The document searching facility reveals that the term is bandied
> about in five places in the standard documentation. These uses
> seem approriate and uncontroversial to me.
> 
> These document functions accepting predicates as aruments:
> 
> 6.5.1 Itertools functions
> 6.5.3 Recipes
> 11.47 Creating a new Distutils command
> 26.10.1 Types and members
> 
> The following provides a few predicate functions (weird! I'd have
> never thought to look there for, e.g., ismodule):
> 
> 6.7 operator -- Standard operators as functions

Module inspect also provides useful predicates (though I don't remember
if its docs CALL them predicates;-).


Alex


From steven.bethard at gmail.com  Fri Aug 17 13:43:35 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 17 Aug 2007 11:43:35 -0600
Subject: to property or function in class object
In-Reply-To: <1187317787.848991.242720@i38g2000prf.googlegroups.com>
References: <1187317787.848991.242720@i38g2000prf.googlegroups.com>
Message-ID: <itGdnSqx45DUQ1jbnZ2dnUVZ_hOdnZ2d@comcast.com>

james_027 wrote:
> i am very new to python, not knowing much about good design. I have an
> object here for example a Customer object, where I need to retrieve a
> info which has a number of lines of code to get it.
> 
> my question is weather what approach should I use? to use the property
> which is from the python new class style as I understand or simple use
> function that will return the the info I needed.
[snip]
> While both approach would get the job done, I don't know much about
> the performance, benefits, design philosophy between the two approach.

I tend to view property as only something you use for the purposes of 
backwards compatibility. So if you started with something as a simple 
attribute and you later realize that it needs to do some computation, 
you can use properties to keep the same API.

However, if I know right off the bat that I need to do some computation 
to return a result, then I'll always prefer a method.  People expect a 
method call to take some computation.  People don't always expect that 
from a simple attribute access.  So I think it's more predictable for 
your users if you use a method when there's any real work being done.

STeVe


From deets at nospam.web.de  Tue Aug 14 19:09:41 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 15 Aug 2007 01:09:41 +0200
Subject: LEGB rule, totally confused ...
In-Reply-To: <mailman.1978.1187113173.22759.python-list@python.org>
References: <mailman.1959.1187094797.22759.python-list@python.org>	<3u*sChSr@news.chiark.greenend.org.uk>
	<mailman.1978.1187113173.22759.python-list@python.org>
Message-ID: <5ier1rF3p7frbU1@mid.uni-berlin.de>

> Thanks guys, I beginning to see the light again,
> and if X is mutual the story is completely different,
> I still have to get used to these differences.

<nitpicking-for-the-sake-of-the-casual-reader>

That's supposed to be "mutable", not "mutual".

</nitpicking-for-the-sake-of-the-casual-reader>

Diez


From davecook at nowhere.net  Mon Aug 20 13:18:42 2007
From: davecook at nowhere.net (Dave Cook)
Date: Mon, 20 Aug 2007 17:18:42 GMT
Subject: Hot subject: a good python editor and/or IDE?
References: <mailman.2162.1187525764.22759.python-list@python.org>
Message-ID: <S1kyi.116948$g86.98676@newsfe14.lga>

On 2007-08-19, S?bastien <seb.buchoux at gmail.com> wrote:

> I am currently using Eclipse+PyDev when developping Python projects but 
> I lack a fast, simple editor for tiny bit of scripts. So here is my 
> question: what is, for you, the current best ( but still kind of light! 
> ) Python editor/IDE ? A tiny precision, I am on Ubuntu so I am looking 
> for a linux compatible editor.

JED has a nice python mode for fast, simple editing.  

Dave Cook


From david at asdf.asdf  Sun Aug 26 21:19:49 2007
From: david at asdf.asdf (bambam)
Date: Mon, 27 Aug 2007 11:19:49 +1000
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com><1187898049.734696.9500@l22g2000prc.googlegroups.com><13csi2tn49esmc3@corp.supernews.com>	<mailman.230.1187928865.32294.python-list@python.org>	<13csqk47j0c56b0@corp.supernews.com>	<CqSdnRl2x8928FPbnZ2dnUVZ_jSdnZ2d@speakeasy.net><13ct7v3qn2v5206@corp.supernews.com>
	<mailman.238.1187948359.32294.python-list@python.org>
Message-ID: <13d49lk6ue2as6d@corp.supernews.com>

That looks good, and perhaps a difference operator
would be too simple to be useful anyway.

Steve.

"Mikael Olofsson" <mikael at isy.liu.se> wrote in message 
news:mailman.238.1187948359.32294.python-list at python.org...
>
>
> bambam wrote:
>>
>> In this case it doesn't matter - my lists don't contain
>> duplicate elements this time - but I have worked with lists in
>> money market and in inventory, and finding the intersection
>> and difference for matching off and netting out are standard
>> operations.
>
> I would use a list comprehension for that case:
>
> A = ['a','b','c','a','c','d']
> U = ['a','b','e']
> B = [x for x in A if x in U]
>
> The result would be B==['a','b','a']
>
> /MiO 




From vedrandekovic at v-programs.com  Wed Aug  8 15:03:49 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Wed, 08 Aug 2007 12:03:49 -0700
Subject: tokenize module after installation
Message-ID: <1186599829.900252.127640@g4g2000hsf.googlegroups.com>

Hi,

I have one more question about installation.

After installation my program that uses tokenize module,when I run
myprogram.exe (vgsveki.exe):

Traceback (most recent call last):
  File "vgsveki.py", line 307, in kompajlati
  File "vgsveki.py", line 302, in kompajlati_proces
  File "vgsveki.py", line 278, in __init__
  File "vgsveki.py", line 93, in kod
AttributeError: 'module' object has no attribute 'untokenize'


but before installation it works properly.


Regards,
Vedran



From deets at nospam.web.de  Wed Aug 22 03:16:40 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 22 Aug 2007 09:16:40 +0200
Subject: for statement on empty iterable
In-Reply-To: <1187765372.361411.249990@z24g2000prh.googlegroups.com>
References: <1187760507.951994.50310@q4g2000prc.googlegroups.com>
	<7xabsk3zgm.fsf@ruckus.brouhaha.com>
	<1187761270.713307.224570@i38g2000prf.googlegroups.com>
	<7xejhw15r9.fsf@ruckus.brouhaha.com>
	<1187761957.636211.107060@x40g2000prg.googlegroups.com>
	<7xd4xgnldp.fsf@ruckus.brouhaha.com>
	<1187765372.361411.249990@z24g2000prh.googlegroups.com>
Message-ID: <5j2679F3s7lbpU1@mid.uni-berlin.de>

james_027 schrieb:
> hi,
> 
>> Oh I see.  You have to combine a couple of concepts but for this
>> example you'd say:
>>
>>    name = 'james'     # 'l' looks too much like the digit 1
>>    for i,c in enumerate(name):
>>       print i, c
>>    print i
>>
>> enumerate(name) generates the sequence
>>
>>    (0,'j'), (1,'a'), (2,'m'), (3,'e'), (4,'s')
>>
>> and the above loop splits those tuples into two indexes i and c.
>>
>> You should probably read the tutorial and work through the examples.
>> If you get something wrong with this basic stuff, your computer won't
>> explode or anything like that, so try stuff out.  Be more careful when
>> you start using library routines that can delete files ;).
> 
> Thanks, it just that I am afraid of coding that something works but
> ugly or inefficient.

While it is desireable to not only write working, but also aesthetically 
pleasing code, as a beginner you shouldn't worry too much. The sense of 
aesthetics develops with time. Important is to try and grasp the idioms 
of the language, around here ofter referred to as "beeing pythonic."

For example, the concept of iterators, and that for most of the times 
you don't need or want an index. And if you really need it, create it 
like paul showed you above.

Diez


From michele.simionato at gmail.com  Mon Aug 13 13:29:54 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Mon, 13 Aug 2007 17:29:54 -0000
Subject: is there anybody using __del__ correctly??
In-Reply-To: <gdSdnYEt6sysG13bnZ2dnUVZ_hynnZ2d@comcast.com>
References: <1186731369.073644.158490@z24g2000prh.googlegroups.com>
	<1186762908.121319.35900@x35g2000prf.googlegroups.com>
	<SradnX_-hI91BiHbnZ2dnUVZ_r6rnZ2d@comcast.com>
	<1186895084.388293.295330@57g2000hsv.googlegroups.com>
	<0M2dnWsFO7-zwSLbnZ2dnUVZ_ryqnZ2d@comcast.com>
	<1186984722.604498.39490@q75g2000hsh.googlegroups.com>
	<gdSdnYEt6sysG13bnZ2dnUVZ_hynnZ2d@comcast.com>
Message-ID: <1187026194.173701.184080@b79g2000hse.googlegroups.com>

On Aug 13, 6:26 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> I doubt I'd want to slow down all attribute access on my
> class just to do some cleanup, when it's probably better to just tell
> everyone to use a ``with`` block. ;-)

Amen. The point is that finding an easy upgrade path for current code
using __del__ does not look easy at all. Maybe we should be bold,
remove __del__ in Py3K, say to everybody to use 'with', and force
people to rewrite their code, ignoring the complaints from the
big frameworks guys (anyway, they are already complaining ;)


     Michele Simionato



From ricaraoz at gmail.com  Thu Aug 23 11:02:16 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Thu, 23 Aug 2007 12:02:16 -0300
Subject: introspection and functions
In-Reply-To: <20070823104810.6054520f.ayaz@dev.null>
References: <1187819949.515982.15450@r23g2000prd.googlegroups.com>	<B33zi.4126$Oo.317@newssvr17.news.prodigy.net>
	<20070823104810.6054520f.ayaz@dev.null>
Message-ID: <46CDA178.4060700@bigfoot.com>

Ayaz Ahmed Khan wrote:
> "James Stroud" typed:
>> py> def doit(a, b, c, x=14):
>> ...   pass
>> ...
>> py> doit.func_code.co_argcount
>> 4
>> py> doit.func_code.co_varnames
>> ('a', 'b', 'c', 'x')
>> py> doit.func_defaults
>> (14,)
> 
> Neat.
> 

How do you know the 14 corresponds to x ?




From rhauff at gmail.com  Fri Aug 31 12:47:07 2007
From: rhauff at gmail.com (gsxg)
Date: Fri, 31 Aug 2007 09:47:07 -0700
Subject: Is there a simple way to exit a while loop on keystroke?
Message-ID: <1188578827.809840.90100@r29g2000hsg.googlegroups.com>

I am new to python, and have written a simple program to read a port
via telnet.  I would like it to run until any key is pressed.  Of
course I wouldn't mind requiring a specific keystroke in the future,
but I would think this is simpler for now.

I have used kbhit() and getch() many times in C, but I can't find
anything similar in  Python.  I am using Linux also, so the msvcrt
code isn't an option.  I have tried sys.stdin.read(), but that hangs
UNTIL a key is pressed.

Thanks



From mail at gedankenkonstrukt.de  Tue Aug 21 06:31:09 2007
From: mail at gedankenkonstrukt.de (Thomas Wittek)
Date: Tue, 21 Aug 2007 12:31:09 +0200
Subject: IDE for Python
In-Reply-To: <mailman.55.1187690455.32294.python-list@python.org>
References: <mailman.55.1187690455.32294.python-list@python.org>
Message-ID: <faeeth$qfp$1@newsreader2.netcologne.de>

Joel Andres Granados schrieb:
> I have tried various times to use an IDE for python put have always been
> disapointed.
> I haven't revisited the idea in about a year and was wondering what the
> python people
> use.

Did you try Eclipse + PyDev? I'm quite happy with that.

-- 
Thomas Wittek
Web: http://gedankenkonstrukt.de/
Jabber: streawkceur at jabber.i-pobox.net
GPG: 0xF534E231


From beema.shafreen at gmail.com  Thu Aug 16 05:42:26 2007
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Thu, 16 Aug 2007 15:12:26 +0530
Subject: clarification
Message-ID: <aa405c1f0708160242s2222a0ak3dd253df50a90c5b@mail.gmail.com>

hi every body,
i have compared two files:
code:

fh = open('HPRD_MAIN_20.txt','r')
for line in fh.readlines():
        data = line.strip().split('#')
        fh1 = open('NOMENCLATURE_MAIN_20.txt','r')
        for line1 in fh1.readlines():
                data1 = line1.strip().split('#')
                if  data1[0] == data[0]:
                        result = data[0] +'#'+data[3]+'|'+
data[4]+'|'+data[9]+'|'+ data1[3]
                        print result
the result was as given below:


00017#ACTG1|actin, gamma 1|Actin gamma 1|ACTG
00017#ACTG1|actin, gamma 1|Actin gamma 1|Actin gamma
00017#ACTG1|actin, gamma 1|Actin gamma 1|Cytoskeletal gamma actin


but i need the result to be like this :


00017#ACTG1|actin, gamma 1|Actin gamma 1|ACTG,Actin gamma,Cytoskeletal
gamma, actin


with out redundancy and the name in the same line separated by commas..
please suggest what should i do for this to get the result like this.


regards
shafreen
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From vedrandekovic at v-programs.com  Fri Aug  3 15:50:09 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Fri, 03 Aug 2007 12:50:09 -0700
Subject: os.listdir path error
Message-ID: <1186170609.001778.15230@l70g2000hse.googlegroups.com>

Hello

Here is my simple listdir example:

>>> import os
>>> os.listdir("C:\Python24\") # This directory relly exists

Here is my error:

WindowsError: [Errno 3] The system cannot find the path specified: 'l/
*.*'

Regards,
Vedran



From mal at egenix.com  Sat Aug 25 16:17:43 2007
From: mal at egenix.com (M.-A. Lemburg)
Date: Sat, 25 Aug 2007 22:17:43 +0200
Subject: pyodbc on linux
In-Reply-To: <1185051273.979145.285050@22g2000hsm.googlegroups.com>
References: <1185051273.979145.285050@22g2000hsm.googlegroups.com>
Message-ID: <46D08E67.7030509@egenix.com>

On 2007-07-21 22:54, Sean Davis wrote:
> I have read a couple of blogs suggesting that pyodbc is buildable
> under linux.  I am running suse 10.2 on a 64-bit intel machine with
> unixODBC installed.  Upon building, I get a slew of pretty horrid
> looking errors that make me wonder if this is supposed to work.  Can
> anyone at least confirm that this is possible before I try to pursue
> things further?

Have you tried mxODBC ?

https://www.egenix.com/products/python/mxODBC/

It's been in production use on Linux for years (including on
64-bit machines).

Regards,
-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Aug 25 2007)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


   eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
    D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
           Registered at Amtsgericht Duesseldorf: HRB 46611


From bignose+hates-spam at benfinney.id.au  Wed Aug  8 17:49:25 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 09 Aug 2007 07:49:25 +1000
Subject: testing
References: <mailman.1744.1186584843.22759.python-list@python.org>
Message-ID: <87r6md66je.fsf@benfinney.id.au>

nikolay marinov <n.marinov at sistechnology.com> writes:

> Hi,there.I'm a young tester (4 months,still learning what is "testing
> >  software!?!"). I work on Linux and i write my tests with Python.

[many more lines of quoted text]

Is this a response to another message? I didn't see any parts of the
message written by you, only paragraphs of quoted text.

-- 
 \        "The World is not dangerous because of those who do harm but |
  `\      because of those who look at it without doing anything."  -- |
_o__)                                                  Albert Einstein |
Ben Finney


From stefan.behnel-n05pAM at web.de  Wed Aug 29 16:03:08 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 29 Aug 2007 22:03:08 +0200
Subject: IDE for Python
In-Reply-To: <mailman.277.1187982888.32294.python-list@python.org>
References: <46CAB7D4.5070308@gmail.com>
	<mailman.277.1187982888.32294.python-list@python.org>
Message-ID: <46D5D0FC.6050908@web.de>

Eric CHAO wrote:
> I think many python developers don't need such an IDE actually. Just
> like Ruby guys, they use a powerful editor, for example, Textmate,
> instead of all-in-one IDE. It's quick and direct.

True. However, some use neither an editor nor an IDE but Emacs.

Stefan


From jeff_barish at earthlink.net  Fri Aug 31 16:51:20 2007
From: jeff_barish at earthlink.net (Jeffrey Barish)
Date: Fri, 31 Aug 2007 14:51:20 -0600
Subject: Biased random?
References: <favd0c$fcu$1@ss408.t-com.hr>	<mailman.80.1188332647.28954.python-list@python.org>	<fb77bq$jtk$1@ss408.t-com.hr>
	<fb7a3d$phj$1@sea.gmane.org> <fb9bg9$ibi$1@sea.gmane.org>
	<fb9nc1$s6v$1@sea.gmane.org>
Message-ID: <fb9v07$iij$2@sea.gmane.org>

I'm sorry that I took the time to respond.
-- 
Jeffrey Barish



From bulliver at badcomputer.org  Thu Aug 23 13:22:55 2007
From: bulliver at badcomputer.org (darren kirby)
Date: Thu, 23 Aug 2007 11:22:55 -0600
Subject: My 'time' module is broken, unsure of cause
Message-ID: <200708231122.55588.bulliver@badcomputer.org>

Hi all,

I have a strange error here and I am unsure how to further investigate it:

Python 2.4.4 (#1, Aug 23 2007, 10:51:29)
[GCC 4.1.2 (Gentoo 4.1.2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
40:42:0
>>> now = time.time()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'module' object has no attribute 'time'

Notice the '40:42:0' that always gets output. I searched Gentoo's bugzilla but 
can not see anything relevant. I rebuilt python but the behavior recurs. I am 
unsure if the issue is with Python, Gentoo, or perhaps with the underlying 
lib (presumably glibc) that Python uses for the time module. This is working 
fine on another machine (also 2.4.4, GCC 3.4.6,  Gentoo Hardened).

Anyone seen this? Any hints for me to track this issue down? Any further 
information I could provide?

Thanks for consideration,
-d
-- 
darren kirby :: Part of the problem since 1976 :: http://badcomputer.org
"...the number of UNIX installations has grown to 10, with more expected..."
- Dennis Ritchie and Ken Thompson, June 1972


From arnodel at googlemail.com  Fri Aug 31 17:05:35 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 31 Aug 2007 21:05:35 -0000
Subject: reload() gone?
In-Reply-To: <mailman.227.1188583814.28954.python-list@python.org>
References: <mailman.227.1188583814.28954.python-list@python.org>
Message-ID: <1188594335.231732.314960@g4g2000hsf.googlegroups.com>

On Aug 31, 7:10 pm, "Bernard Lebel" <3dbern... at gmail.com> wrote:
> I read in the Python 3.0 documentation that reload() was removed,
> without further explanations.
>
> http://docs.python.org/dev/3.0/whatsnew/3.0.html?highlight=reload
>
> So what are we supposed to do to reload modules?
>
PEP 3100 says: use exec() instead.

--
Arnaud



From horpner at yahoo.com  Tue Aug 14 00:48:12 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 14 Aug 2007 04:48:12 GMT
Subject: Car Air Conditioners
References: <1186993120.706804.185590@b79g2000hse.googlegroups.com>
	<kk32c3d5qk1ur2eo1beqe77efsof70smhc@4ax.com>
	<5icij7F3ockgtU1@mid.individual.net>
Message-ID: <guawi.37675$G23.19281@newsreading01.news.tds.net>

On 2007-08-14, greg <greg at cosc.canterbury.ac.nz> wrote:
> Robert Coe wrote:
>> It's hard to imagine anything more OT in this newsgroup
>
> It's on topic as long as the air conditioner
> can be programmed in Python. With the amount
> of electronics being used in cars these days,
> that's not entirely beyond the realms of
> possibility...

Well, I thought the post was about a cool new version of Lisp.

-- 
Neil Cerutti


From musiccomposition at gmail.com  Mon Aug 13 22:22:09 2007
From: musiccomposition at gmail.com (Benjamin)
Date: Tue, 14 Aug 2007 02:22:09 -0000
Subject: Icons for GUI development
Message-ID: <1187058129.306171.174590@g12g2000prg.googlegroups.com>

I'm developing a mail client. Since GUI are usually improved with some
icons, I'm looking for some. Because I'm not a very gifted artist I'm
searching for a library of GPL or public domain icons. Any suggestions?



From gnewsg at gmail.com  Tue Aug 21 20:43:02 2007
From: gnewsg at gmail.com (billiejoex)
Date: Tue, 21 Aug 2007 17:43:02 -0700
Subject: IDE for Python
In-Reply-To: <mailman.83.1187728605.32294.python-list@python.org>
References: <46CAB7D4.5070308@gmail.com>
	<mailman.83.1187728605.32294.python-list@python.org>
Message-ID: <1187743382.269858.319860@z24g2000prh.googlegroups.com>

On 21 Ago, 22:36, Brad Johnson <Brad.John... at ballardtech.com> wrote:
> Joel Andres Granados <joel.granados <at> gmail.com> writes:
>
>
>
> > Hello list:
>
> > I have tried various times to use an IDE for python put have always been
> > disapointed.
>
> Not sure which platform you're on, but I've really liked PyScripter for the
> Windows platform.

+1
I'm a satisfied user too.



From xah at xahlee.org  Sat Aug 11 06:57:03 2007
From: xah at xahlee.org (Xah Lee)
Date: Sat, 11 Aug 2007 03:57:03 -0700
Subject: The Modernization of Emacs: keyboard shortcuts pain
In-Reply-To: <1186277244.045554.308420@i13g2000prf.googlegroups.com>
References: <1182093200.598418.218620@e9g2000prf.googlegroups.com>
	<1182272678.877166.209640@j4g2000prf.googlegroups.com>
	<1184764620.778937.264760@m37g2000prh.googlegroups.com>
	<1185282252.520022.20780@z28g2000prd.googlegroups.com>
	<1186277244.045554.308420@i13g2000prf.googlegroups.com>
Message-ID: <1186829823.834012.198770@z24g2000prh.googlegroups.com>

The following is a FAQ from emacs modernization
http://xahlee.org/emacs/modernization.html

Q: Emacs's undo is superior, because the prevalent Undo/Redo system
actually loss info.

A: Emac's undo is very confusing and does not have a Redo command. To
redo after a undo, people are told to type something then do a undo.
Long time emacs user argue that it is technically superior because it
lets user to revert to any possible state of the past.

A practical problem with the way of emacs undo is that it repeats the
states in the action record. In the prevalent undo model, the action
record is linear, and each entry is unique. A user can easily arrive
at a desired previous state using undo and redo. In emacs's model, it
traverses the queue back and forth (or add existing states to the
stack). It is hard for a user to know when to do undo or do "some
random typing followed by undo" to get to the state he wants. In
particular, once a person did more than once of "some random typing
followed by undo", the undo record becomes too convoluted for a person
to keep in mind and often the undo action becomes useless at that
point.

If you take a survey among programers who use emacs for at least 1
year, perhaps more than 90% are confused by emacs's undo model and do
not find it useful. If you take a survey of software users other than
emacs, i do not think anyone will report their software's undo lacks
something to be desired.

It is reasonable to argue, that people work better with a simple undo/
redo model. Undo is practically used to erase a mistake or doing a
simple one-time revision. Once a user did a sequence of undos and
redos, we can assume that he arrived at a satisfactory point and
intends to start fresh from that point. If he needs extra revision
control, a more proper mechanism, one that people actually use, is to
revert to the saved version.

  Xah
  xah at xahlee.org
  http://xahlee.org/



From arkanes at gmail.com  Wed Aug  8 11:38:52 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 8 Aug 2007 10:38:52 -0500
Subject: Tkinter or wxpython?
In-Reply-To: <46B9DE7B.3050909@codebykevin.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
	<7x7io8r6na.fsf@ruckus.brouhaha.com> <hgamo4-p2m.ln1@lairds.us>
	<46B9DE7B.3050909@codebykevin.com>
Message-ID: <4866bea60708080838t54a7093cve8dcc932dd07f3f0@mail.gmail.com>

On 8/8/07, Kevin Walzer <kw at codebykevin.com> wrote:
> Cameron Laird wrote:
> >
> > While those with an artistic eye
> > assure me the simplest Tkinter programs look worse
> > that corresponding ones built with any other toolkit,
> > they behave the most coherently in regards to resizing
> > and so on.
> >
>
> "Look worse" can be addressed through extensive means: through theming
> (via Tile, which can now be easily used in Tkinter; see
> http://tkinter.unpy.net/wiki/TileWrapper); and through other aspects of
> UI design, such as color, fonts, and even use of icons. A pyGtk or
> wxPython application that uses old-school Gnome icons, for instance,
> will look ugly. It's quite possible to make an attractive Tkinter
> application using modern, stylish icons that even blends in reasonably
> well on a specific platform (I've done it).
>
> --

Using Tile, of course, loses you the first major benefit of Tk - that
it's already included in the standard library. So in this sense it's
still "ugly old school look and feel" vs "no external dependencies",
which is the swing decision for many people. People who prefer the Tk
API, of course, will be happy to use Tile.

Also, while you can get (mostly) native *look*, the feel is absent.
Unless I'm very uninformed, Tile is a theming engine only, and doesn't
implement platform conventions with regard to behavior (the "feel"
part of look and feel).


From rainwatching at gmail.com  Sat Aug  4 06:22:53 2007
From: rainwatching at gmail.com (=?iso-8859-1?q?S=F6nmez_Kartal?=)
Date: Sat, 04 Aug 2007 10:22:53 -0000
Subject: regexp problem in Python
In-Reply-To: <1186177312.117581.129910@d55g2000hsg.googlegroups.com>
References: <1186177312.117581.129910@d55g2000hsg.googlegroups.com>
Message-ID: <1186222973.073756.300890@r34g2000hsd.googlegroups.com>

On 4 A ustos, 00:41, Ehsan <ehsan.khod... at gmail.com> wrote:
> I want to find "http://www.2shared.com/download/1716611/e2000f22/
> Jadeed_Mlak14.wmv?tsid=20070803-164051-9d637d11"  or 3gp instead of
> wmv in the text file like this :
> <html>
> ""some code""
> function reportAbuse() {
>     var windowname="abuse";
>     var url="/abuse.jsp?link=" + "http://www.2shared.com/file/1716611/
> e2000f22/Jadeed_Mlak14.html";
>     OpenWindow =
> window.open(url,windowname,'toolbar=no,scrollbars=no,resizable=no,width=500,height=500,left=50,top=50');
>     OpenWindow.focus();
>   }
>   function startDownload(){
>     window.location = "http://www.2shared.com/download/1716611/
> e2000f22/Jadeed_Mlak14.wmv?tsid=20070803-164051-9d637d11";
>     //document.downloadForm.submit();
>   }
>   </script>
> </head>
> </html>http://www.2shared.com/download/1716611/e2000f22/
> Jadeed_Mlak14.3gp?tsid=20070803-164051-9d637d11"sfgsfgsfgv
>
> I use this pattern :
> "http.*?\.(wmv|3gp).*""
>
> but it returns only 'wmv' and '3gp' instead of "http://www.2shared.com/
> download/1716611/e2000f22/Jadeed_Mlak14.wmv?
> tsid=20070803-164051-9d637d11"
>
> what can I do? what's wrong whit this pattern? thanx for your comments

You could use r'window.location = "(.*?\.(wmv|3gp)";' as your regex
string, I guess..



From http  Fri Aug  3 22:01:04 2007
From: http (Paul Rubin)
Date: 03 Aug 2007 19:01:04 -0700
Subject: How to pass a reference to the current module
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<pan.2007.08.04.01.46.50.985228@REMOVE.THIS.cybersource.com.au>
	<f90lon$av5$1@daisy.noc.ucla.edu>
Message-ID: <7xtzrg3vof.fsf@ruckus.brouhaha.com>

James Stroud <jstroud at mbi.ucla.edu> writes:
>       Module            Behavior
>    ==============  ====================================================
>     UserDefined1   Imports FunctionUser
>     ThirdParty     Contains User Functions (May be ==UserDefined1)
>     FunctionUser   do_something_with() and/or get_function_from_name()
> 
> So the name-to-function mapping is done in FunctionUser but the
> function is actually defined in UserDefined1 (or ThirdParty if
> ThirdParty is different than UserDefined1).

I'm still completely confused.  Does FunctionUser know what module the
user functions are supposed to come from?  Could you give an example
of what you want the actual contents of those 3 modules to look like?
E.g.:

    UserDefined1.py:
      import FunctionUser

      def foo(x):
          print x+3

    FunctionUser.py:
       def do_something_with (module, funcname, *args, **kw):
         func = getattr(module, funcname)
         func (*args, **kw)

    main.py:
       import UserDefined1, FunctionUser

       # the following should print 10
       FunctionUser.do_something_with(UserDefined1, 'foo', 7)

I don't think the above is quite what you want, but is it somewhere
close?


From jzgoda at o2.usun.pl  Thu Aug  2 10:34:35 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Thu, 02 Aug 2007 16:34:35 +0200
Subject: Determining if file is valid image file
In-Reply-To: <1186064275.652416.250540@d55g2000hsg.googlegroups.com>
References: <1186064098.587590.91210@g4g2000hsf.googlegroups.com>
	<1186064275.652416.250540@d55g2000hsg.googlegroups.com>
Message-ID: <f8sqb8$1t6$1@nemesis.news.tpi.pl>

Andr? napisa?(a):

>> Other than installing PIL, is there a "simple" way using Python only
>> to determine if a file is a valid image file?
>>
>> I'd be happy if I could at least identify valid images files for gif,
>> jpeg and png.   Pointers to existing modules or examples would be
>> appreciated.
>>
>> The reason why I'd prefer not using PIL is that I'd like to bundle
>> such a function/module in my app.
>>
>> Andr?
> 
> I should have added: I'm interesting in validating the file *content*
> - not the filename :-)

Is the module imghdr enough for your needs?

-- 
Jarek Zgoda
Skype: jzgoda | GTalk: zgoda at jabber.aster.pl | voice: +48228430101

"We read Knuth so you don't have to." (Tim Peters)


From fabioztessitore at libero.it  Sun Aug 12 14:18:32 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 12 Aug 2007 18:18:32 GMT
Subject: who is simpler? try/except/else or try/except
References: <46bf4074$0$10626$4fafbaef@reader2.news.tin.it>
	<f9ni70$uhr$00$1@news.t-online.com>
Message-ID: <46bf4ef8$0$10626$4fafbaef@reader2.news.tin.it>

Il Sun, 12 Aug 2007 20:06:23 +0200, Peter Otten ha scritto:

[cut]
> at the same time introducing the implicit
> constraint that the latter does not fail with <Error I can handle>.
> Therefore the original code gives the reader a much clearer notion of
> the author's intention.  This may not be a problem for the simple code
> at hand but is definitely a bad habit to get into.
> 

thanks Peter, that's the kind of opinion I'm interesting to.

bye
Fabio


From f.guerrieri at gmail.com  Thu Aug 23 09:41:04 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Thu, 23 Aug 2007 15:41:04 +0200
Subject: Joining elements in a list to 1 element
In-Reply-To: <46CD8ABC.9080407@sdf.lonestar.org>
References: <e75321bd0708230249k6e4670a2n9436902257c67f1@mail.gmail.com>
	<79b79e730708230343t5e2ec45dx9d334bbf48b75e55@mail.gmail.com>
	<46CD8ABC.9080407@sdf.lonestar.org>
Message-ID: <79b79e730708230641l33a9afebi59e8bc5ab38907b8@mail.gmail.com>

On 8/23/07, J. Cliff Dyer <jcd at sdf.lonestar.org> wrote:
>
>  What do you want to have happen in this case?
>
> my_list = [ 'a', 4, 'c' ]
>


It depends on the requirements of the OP.
A possible solution could be:

my_second_list = []
try:
    my_second_list.append("".join(my_list))
except TypeError:
    my_second_list.append("".join(str(item) for item in my_list) )


But it depends on the the actual requirements, maybe it isn't meaningful for
the original list to contain numbers (think for instance of nucleotide
sequences...?)

Francesco
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From rajingwei at gmail.com  Tue Aug 28 04:18:37 2007
From: rajingwei at gmail.com (baby's happy)
Date: Tue, 28 Aug 2007 01:18:37 -0700
Subject: Biased random?
In-Reply-To: <mailman.46.1188255849.28954.python-list@python.org>
References: <favd0c$fcu$1@ss408.t-com.hr>
	<favgh4$1gm3$1@grapevine.csail.mit.edu>
	<13d6i72s8b2a3ad@corp.supernews.com>
	<46D34ECF.8060106@sdf.lonestar.org>
	<mailman.46.1188255849.28954.python-list@python.org>
Message-ID: <1188289117.351952.39300@e9g2000prf.googlegroups.com>

I saw your article is very good, I like it very much. I will continue
to pay attention to your article, the following are the points I hope
that I have similar concerns.
http://www.game-win.com http://www.game-win.com/wow-powerleveling.html
http://www.game-win.com/faq.html http://www.game-win.com/power-leveling.html
http://www.game-win.com/World-of-Warcraft-power-leveling.html
http://www.paper-cup-machine.com http://www.sinceremachine.com
http://www.clickra.com http://www.clickra.com/NewsList_2.htm
http://www.east163.com http://www.ruian2machine.cn http://www.rajayj.cn
http://www.mycvcv.com http://www.dgajm.com http://www.icansee.cn
http://www.icansee.cn/chanpin.htm http://www.pjwsdyb.com http://www.shdyf.com
http://www.nonwoven-bags.cn http://www.plastic-thermoforming-machine.com

http://www.gopowerlevel.com



From kyosohma at gmail.com  Fri Aug 17 10:14:09 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 17 Aug 2007 07:14:09 -0700
Subject: Question on SPE and pwintypes.dll
In-Reply-To: <1187357898.740425.33170@r29g2000hsg.googlegroups.com>
References: <1187357898.740425.33170@r29g2000hsg.googlegroups.com>
Message-ID: <1187360049.391743.9980@l22g2000prc.googlegroups.com>

On Aug 17, 8:38 am, Gerry <gerard.bl... at gmail.com> wrote:
>    I'm running SPE 8.3.c under XP, on a new PC.
>
>    The files for SPE and Python were copied to the new machine, but
> the OS wasn't migrated, so the registry didn't know about either.
>
>    I reinstalled Python 2.5.1, and Python seems fine.
>
>    I made a shortcut to SPE.pyw.  Clicking on the shortcut gives an
> error pop-up, application failed to start cannot find pwintypes.dll.
> When I click "OK", SPE seems to start normally.
>
>    Any idea what's up?  Googling for pwintypes.dll didn't give me any
> hits.
>
>    Gerry

Probably just need to do a search in the registry of the old PC for
SPE or that dll file and then make the appropriate changes on your new
PC. Or just reinstall SPE.

Mike



From paddy3118 at googlemail.com  Fri Aug 31 16:24:15 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Fri, 31 Aug 2007 20:24:15 -0000
Subject: OT: pronounciation [was: list index()]
In-Reply-To: <mailman.191.1188555581.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<1188497498.3468.60.camel@dot.uniqsys.com>
	<mailman.188.1188546300.28954.python-list@python.org>
	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
	<1188551958.728836.137370@x35g2000prf.googlegroups.com>
	<fOadnfwlCJbQfErbnZ2dnUVZ_jCdnZ2d@speakeasy.net>
	<46D7E36D.4000301@timgolden.me.uk>
	<mailman.191.1188555581.28954.python-list@python.org>
Message-ID: <1188591855.327294.181280@r34g2000hsd.googlegroups.com>

On Aug 31, 11:19 am, Tim Golden <m... at timgolden.me.uk> wrote:
> Tim Golden wrote:
> > Erik Max Francis wrote:
> >> Paddy wrote:
>
> >>> I say the 'oll' in troll like the 'ol' in frolic, and pronounce roll
> >>> and role similarly.
>
> >>> My accent is probably from the East Midlands of the UK, but is not
> >>> pronounced.
> >> _Troll_ and _frolic_ aren't pronounced with the same "o" sound in any
> >> accent I've ever heard of.  Which you pronounce _boat_ and _bot_ the
> >> same way, too?
>
> > [Amusingly contemplating a trolling war about the pronunciation of "troll"]
>
> > Well they sound the same in my more-or-less South London accent.
> > I can't write those funny phonetic symbols (and I hate to
> > imagine the Unicode encoding hoops I'd have to jump through
> > to make them readable anyway) but both "o"s sound short to me.
> > Like "bot" rather than "boat" using your example.
>
> Since we're talking... I'm still a little startled when I listen
> to some of the excellent webcasts that are being produced these
> days (showmedo.com and friends) and hear American voices pronounce
> Python... well, the way they do, with the stress and something of a
> drawl on the second syllable. I'm sure it's just as amusing the other
> way round: we pronounce it with the stress on the first syllable and
> the characteristic short vowel sound in the second.
> (Something like: Pie'thun).
>
> TJG

The only true way of pronouncing Python (the computing language), is
the way it is done at the beginning of Monty Pythons Flying Circus of
course :-)

Your right, the American way does make me pause.

- Paddy.



From jstroud at mbi.ucla.edu  Tue Aug 21 00:00:05 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 20 Aug 2007 21:00:05 -0700
Subject: Retrieving a variable's name.
In-Reply-To: <1187658202.236626.93600@50g2000hsm.googlegroups.com>
References: <1187658202.236626.93600@50g2000hsm.googlegroups.com>
Message-ID: <fado06$a1e$1@zinnia.noc.ucla.edu>

rodrigo wrote:
> How would I go about retrieving a variable's name (not its value)? I
> want to write a function that, given a list of variables, returns  a
> string with each variable's name and its value, like:
> 
> a: 100
> b: 200
> 
> I get the feeling this is trivial, but I have been unable to find an
> answer on my own.
> 
> Thanks,
> 
> Rodrigo
> 

Use a dict as that is what you access when you use namespaces anyway:

py> type(globals())
<type 'dict'>

The essential problem with what you suggest is that python assigns names 
to references to objects, so the interpreter can not tell what name you 
want by a reference to the object, so it gives you whatever name it 
happens to find, which, since the names are keys to a dict, come in 
arbitrary order. For example, consider this situation:

py> a = 4
py> b = a
py> ns = globals()
py> for avar in a,b:
...   for k,v in ns.items():
...     if v is avar:
...       print '%s is %s' % (k,v)
...       break
...
avar is 4
avar is 4

So getting at the names by reference to thee objects will never be 
dependable. Passing names makes more sense:

py> for aname in ['a', 'b']:
...   print '%s is %s' % (aname, globals()[aname])
...
a is 4
b is 4

But this is tantamount to using a dict:

py> mydict = {'a':4, 'b':2}
py> for aname in ['a', 'b']:
...   print '%s is %s' % (aname, mydict[aname])
...
a is 4
b is 2

Which is preferred because it keeps your namespaces cleaner.

James


-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From no.email.here at zombo.com  Wed Aug 29 16:49:59 2007
From: no.email.here at zombo.com (Moon)
Date: Wed, 29 Aug 2007 20:49:59 GMT
Subject: Short, crazy example: list-derived class, with __iadd__
Message-ID: <XZkBi.24445$wN3.18068@bignews2.bellsouth.net>

class Vec(list):
    def __init__(self):
        list.__init__(self, [0.0, 0.0])

    def __iadd__(self, other):
        assert isinstance(other, Vec)
        self[0] += other[0]
        self[1] += other[1]
        print "right now, v is: ", self, " as you'd expect"


v = Vec()
w = Vec()
w[0] = 1.0
w[1] = 2.0
print "v starts:", v

print "(w is:", w, " which is fine)"

v += w

print "(w still is:", w

print "after iadd, v: ", v, " <-- becomes None! What the hey?"


# - running it: 

py> python badvec.py
v starts: [0.0, 0.0]
(w is: [1.0, 2.0]  which is fine)
right now, v is:  [1.0, 2.0]
(w still is: [1.0, 2.0]
later, v is:  None  <-- becomes None! What the hey?

py> python -V
Python 2.5.1

-- Any explanation from a guru?  

Thanks much...


From see at signature.invalid  Mon Aug 27 19:22:35 2007
From: see at signature.invalid (Douglas Wells)
Date: Mon, 27 Aug 2007 19:22:35 -0400 (EDT)
Subject: Socket - gaierror
References: <1188242671.182072.130150@r23g2000prd.googlegroups.com>
	<1188244050.029920.314700@i13g2000prf.googlegroups.com>
Message-ID: <favmbr$21sq$1@flame.contek.com>

In article <1188244050.029920.314700 at i13g2000prf.googlegroups.com>,
 half.italian at gmail.com writes:
> On Aug 27, 12:32 pm, Larry Bates <larry.ba... at websafe.com> wrote:
> 
> Changing it to IP gives me the same exact error...
> 
>   File "bin/prgram.py", line 123, in notify
>     smtp = smtplib.SMTP("XXX.XXX.XXX.XXX")
> 
>   File "/usr/lib/python2.4/smtplib.py", line 255, in __init__
>     addr = socket.gethostbyname(socket.gethostname())
> 
> gaierror: (-2, 'Name or service not known')
> 
> Looks like the smtp port is closed on the client machine...doh Should
> have gotten to that!
> 
> ~Sean

Note that the lookup is of your *local* system name
(socket.gethostname()).  I suspect that the name of your client
system (the one running the python script) is not registered in
DNS.

Try ping'ing your own system and see if that resolves in DNS.  In
UNIX/Linux you can use the hostname command; in any system you can
write a python script to print the result of socket.gethostname().

 - dmw


-- 
.   Douglas Wells             .  Connection Technologies      .
.   Internet:  -sp9804- -at - contek.com-                     .


From bjourne at gmail.com  Wed Aug 22 09:00:15 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Wed, 22 Aug 2007 15:00:15 +0200
Subject: advice about `correct' use of decorator
In-Reply-To: <46C5C9AE.5020508@fmed.uba.ar>
References: <46C4B097.4080309@fmed.uba.ar>
	<740c3aec0708170529s6f7e7fe2l8c92771c2d0a51d4@mail.gmail.com>
	<46C5C9AE.5020508@fmed.uba.ar>
Message-ID: <740c3aec0708220600u7c01ca85kdddedfede9dac415@mail.gmail.com>

On 8/17/07, Gerardo Herzig <gherzig at fmed.uba.ar> wrote:
> BJ?rn Lindqvist wrote:
> >def is_logued_in():
> >    if not user.is_logged_in():
> >        raise NotLoggedInError
> >
> >It costs you one more line, but reduces complexity. And if you are
> >worried about that extra line you can put it in a function.
> >
> As far as i know (by the way, AFAK is the shortcut?, and BTW means `by
> the way'? ), decorators are not indispensable. I mean, all that you can
> do with python, you can doit without decorators. And from my point of
> view, this hides the complexity for the other developers of my group,

hiding is not the same thing as reducing. By hiding the code behind a
decorator, you are increasing the complexity by adding another layer
that the programmer has to look through to see your control flow.

> since all they have to do is add the @is_logged_in line at the top of
> the cgi script, and not to worrie about exceptions, not even how the
> decorator is implemented (i may log the error in some file). All they
> have to know is that any abnormal situation will redirect to the `login'
> screen.

As I said, you can accomplish the exact same thing by calling a
function from within the function that requires the user to be logged
in.

def change_pass():
    check_user_logged_in()
    ... more stuff here...

is less complex (and therefore preferable) than:

@check_user_logged_in
def change_pass():
    ... more stuff here...

An important principle in engineering is that you should always strive
to make your design as simple as possible. If you have two equal
designs, you should always choose the one that is simpler because
simple things are easier to understand than complex things.


-- 
mvh Bj?rn


From deets at nospam.web.de  Sun Aug 19 14:43:42 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 19 Aug 2007 20:43:42 +0200
Subject: Latest models of Gibson guitars
In-Reply-To: <1187548916.909340.37420@k79g2000hse.googlegroups.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<1187548916.909340.37420@k79g2000hse.googlegroups.com>
Message-ID: <5irhb9F3qrs2kU1@mid.uni-berlin.de>

> Hello,
> 
> This is  a newsgroup of programming language Python, stop with this!


And by fully citing the message including the links, you increase the 
visibility of the spammers site. Don't do that.


Diez


From bj_666 at gmx.net  Wed Aug 29 12:40:46 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 29 Aug 2007 16:40:46 GMT
Subject: general function for sorting a matrix
References: <1188402447.290663.307640@z24g2000prh.googlegroups.com>
Message-ID: <5jllseF6oarU1@mid.uni-berlin.de>

On Wed, 29 Aug 2007 08:47:27 -0700, Xah Lee wrote:

> While reviewing this code, there's something interesting of note.
> 
> Namely, in my perl solution, the approach is drastically different
> than the python version. Instead of sorting by looping thru the
> sorting directives, it parses the directives then generate the
> complete sort code, then eval it in one shot. This is more of a pure
> functional approach.

I don't see why that is more functional.  After all you iterate in both
versions through the directives.  In Perl to build the code, in Python to
sort the list multiple times.  Here's a Python function that sorts the
list just once:

def sort_matrix(matrix, directives):
    tmp = [(column - 1, str if as_string else float, 1 if ascending else -1)
           for (column, as_string, ascending) in directives]
    
    def cmp_func(row_a, row_b):
        for column, convert_func, factor in tmp:
            result = cmp(convert_func(row_a[column]),
                         convert_func(row_b[column])) * factor
            if result:
                return result
        return 0
    
    matrix.sort(cmp=cmp_func)

There's no return value as your reference implementation sorts in place
too.

Ciao,
	Marc 'BlackJack' Rintsch


From jstroud at mbi.ucla.edu  Mon Aug 20 00:31:41 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 19 Aug 2007 21:31:41 -0700
Subject: popen4 not returning output
In-Reply-To: <1187582318.054450.76960@z24g2000prh.googlegroups.com>
References: <1187582318.054450.76960@z24g2000prh.googlegroups.com>
Message-ID: <lJ8yi.6118$924.1308@newssvr23.news.prodigy.net>

hortitude at gmail.com wrote:
> I am trying to run the following script:
> 
> 
> #!/usr/bin/python
> 
> import popen2
> 
> commandToRun = """scp scp_trial.py user at host:/targetDirectory"""
> #commandToRun = "ls"
> print commandToRun
> p_out, p_in = popen2.popen4 (commandToRun)
> 
> theOut = p_out.readlines ()
> print theOut
> 
> 
> When I run this command with the "ls" command I see the output.
> When I run this with the scp command I do not see the output of my
> command -- however the file is successfully transfered.  How can I see
> the output?
> 
> Thanks
> 

I'm not up on my scp, but look at popen3 and read from err.

James


From jecarnell at saintfrancis.com  Mon Aug 27 10:48:46 2007
From: jecarnell at saintfrancis.com (Carnell, James E)
Date: Mon, 27 Aug 2007 09:48:46 -0500
Subject: Image.open( "C:\test.jpg") is this wrong ?
Message-ID: <CEFAE560FE3E3C458A2335A1AA37A82D06763937@MAIL2W2K3.WarrenNT.SaintFrancis.Loc>



> I am trying to simply open an image with PIL... My problem is that I
> don't know what my active directory is so I am putting an absolute
> path name in quotes. It can't find the specified file or directory.
> I'm horrible with docs. I also tried to save an image file (to find
> where it saved it, but I didn't understand what mode is (I now know it
> is RGB etc.). Does everyone usually do fairly well with the docs
> except for me??? For instance, it says Image.open(file, ...something
> else [I'm at work so I don't remember]). How am I supposed to know
> even to put quotes around the filepath? I'm really starting to wonder
> if there is something wrong with me.
> 
> So How do I open an image?
> 
> Image.open("C:\test.jpg")  # this is what I have right now. And it
> can't find the file or directory. The file is there (it is everywhere
> on my computer now!!!)
> 
I found some code where they apply the file path to a variable in single
quotes. Is that how it is done. Also I thought single quotes were for
characters not strings.

> Sincerely,
> 
> James Carnell
> 
> 
-------------- next part --------------
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From zentraders at gmail.com  Wed Aug 22 14:20:18 2007
From: zentraders at gmail.com (Zentrader)
Date: Wed, 22 Aug 2007 11:20:18 -0700
Subject: Free Air Conditioners!!!!!!
In-Reply-To: <OXgBfsH5HHA.1212@TK2MSFTNGP05.phx.gbl>
References: <1187738115.972271.94080@r23g2000prd.googlegroups.com>
	<OXgBfsH5HHA.1212@TK2MSFTNGP05.phx.gbl>
Message-ID: <1187806818.490520.231690@e9g2000prf.googlegroups.com>

On Aug 21, 10:13 pm, "Scott M." <s-... at nospam.nospam> wrote:
> Oh my God!  How did you know?!!  You were so smart to post that here!
>
> <manager... at gmail.com> wrote in message
>
> news:1187738115.972271.94080 at r23g2000prd.googlegroups.com...
>
> >http://freeairconditioners.blogspot.com/

It's probably a handheld fan made out of a piece of paper



From istvan.albert at gmail.com  Wed Aug  8 10:07:46 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Wed, 08 Aug 2007 14:07:46 -0000
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <41Dti.37401$G23.10727@newsreading01.news.tds.net>
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
	<eICti.37400$G23.15165@newsreading01.news.tds.net>
	<41Dti.37401$G23.10727@newsreading01.news.tds.net>
Message-ID: <1186582066.096793.14700@57g2000hsv.googlegroups.com>

On Aug 6, 6:49 am, Neil Cerutti <horp... at yahoo.com> wrote:

> Incidentally, from the second link I find it shocking that the
> keyword parameter "file" shadows a builtin. It seems to endorse a
> bad practice.

I believe that the "file" builtin has been removed as well so it won't
shadow anything.

i.



From info at egenix.com  Wed Aug 22 08:59:03 2007
From: info at egenix.com (eGenix Team: M.-A. Lemburg)
Date: Wed, 22 Aug 2007 14:59:03 +0200
Subject: ANN: eGenix mxODBC Distribution 3.0.1 (mxODBC Database Interface)
Message-ID: <46CC3317.3070305@egenix.com>

________________________________________________________________________

ANNOUNCING

               eGenix.com mxODBC Database Interface

                          Version 3.0.1


       Our commercially supported Python extension providing
        ODBC database connectivity to Python applications
                 on Windows and Unix platforms


This announcement is also available on our web-site for online reading:
http://www.egenix.com/company/news/eGenix-mxODBC-Distribution-3.0.1-GA.html

________________________________________________________________________

INTRODUCTION

The mxODBC Database Interface allows users to easily connect
Python applications to just about any database on the market
today - on both Windows and Unix platforms in a highly portable
and convenient way.  This makes mxODBC the ideal basis for writing
cross-platform database programs and utilities in Python.

mxODBC is included in the eGenix.com mxODBC Distribution
for Python, which is part of the eGenix.com mx Extension Series -
a collection of professional quality software tools aimed at enhancing
Python's usability in many important areas such as database
connectivity, fast text processing, date/time processing and
web site programming.

The package has proven its stability and usefulness in many mission
critical applications and various commercial settings all around
the world. It's been used in production for almost 10 years now.

* About Python:
Python is an object-oriented Open Source programming language which
runs on all modern platforms (http://www.python.org/). By integrating
ease-of-use, clarity in coding, enterprise application connectivity
and rapid application design, Python establishes an ideal programming
platform for todays IT challenges.

* About eGenix:
eGenix is a consulting and software product company focused on
providing professional quality services and products to Python
users and developers (http://www.egenix.com/).

________________________________________________________________________

NEWS

mxODBC 3.0.1 is a patch-level release and includes the following
updates:

Enhanced SQL Server ODBC driver support:

    * work-around for using Unicode parameters together with
      cursor.executedirect()
    * bug-fix for cursor.stringformat setting when used with
      cursor.executedirect()
    * improved compatibility by using non-padding character binding
      codes

Documentation:

    * added more documentation and an example of how to use the new
      connection and cursor error handlers.

      Error handlers were introduced in mxODBC 3.0.0 and allow for much
      greater control over how low-level errors in the interface are to
      be dealt with.

For the full set of changes please check the mxODBC change log.

________________________________________________________________________

DOWNLOADS

The download archives and instructions for installing the package can
be found at:

    http://www.egenix.com/products/python/mxODBC/

IMPORTANT:
In order to use the eGenix mxODBC package you will first need to
install the eGenix mx Base package:

    http://www.egenix.com/products/python/mxBase/

________________________________________________________________________

UPGRADING

You are encouraged to upgrade to this latest mxODBC release, especially
if you are using MS SQL Server as database server.

Customers who have purchased mxODBC 3.0 licenses can download and
install this patch-level release on top of their existing installations.
The licenses will continue to work with version 3.0.1.

Users of mxODBC 2.0 will have to purchase new licenses from our online
shop in order to upgrade to mxODBC 3.0.1.

You can request 30-day evaluation licenses by writing to
sales at egenix.com, stating your name (or the name of the company) and the
number of eval licenses that you need. We will then issue you licenses
and send them to you by email. Please make sure that you can receive ZIP
file attachments on the email you specify in the request, since the
license files are send out as ZIP attachments.

_______________________________________________________________________

SUPPORT

Commercial support for these packages is available from eGenix.com.
Please see

    http://www.egenix.com/services/support/

for details about our support offerings.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Aug 22 2007)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


   eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
    D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
           Registered at Amtsgericht Duesseldorf: HRB 46611




From duncan.booth at invalid.invalid  Sun Aug 12 13:44:36 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 Aug 2007 17:44:36 GMT
Subject: Regular Expression Grouping
References: <1186939262.144073.182450@z24g2000prh.googlegroups.com>
Message-ID: <Xns998ABEA952734duncanbooth@127.0.0.1>

linnewbie at gmail.com wrote:

> Fairly new to this regex thing, so this might be very juvenile but
> important.
> 
> I cannot understand and why 'c' constitutes a group here without being
> surrounded by "(" ,")" ?
> 
>>>>import re
>>>> m = re.match("([abc])+", "abc")
>>>> m.groups()
> ('c',)
> 
> Grateful for any clarity.
> 
The group matches a single letter a, b, or c. That group must match one or 
more times for the entire expression to match: in this case it matches 3 
times once for the a, once for the b and once for the c. When a group 
matches more than once, only the last match is available, i.e. the 'c'. The 
matches against the a and b are discarded.

Its a bit like having some code:

   x = 'a'
   x = 'b'
   x = 'c'
   print x

and asking why x isn't 'a' and 'b' as well as 'c'.


From gerdusvanzyl at gmail.com  Sun Aug 26 12:47:02 2007
From: gerdusvanzyl at gmail.com (Gerdus van Zyl)
Date: Sun, 26 Aug 2007 16:47:02 -0000
Subject: New UI Toolkit
Message-ID: <1188146822.129605.160560@22g2000hsm.googlegroups.com>

Hi

I am halfway to a first release of a new GUI library for python. It
will be cross platform and follows the Swing philosophy of user
experience and interface fidelity above "but it doesn't look like
windows!" (aside: neither does office 2007 or windowsmediaplayer).

The library is built on top of CairoGraphics (cairographics.org) and
currently has a rather stable backend for Win32 and experimental
backends for GTK,Pyglet,pygame.

I am also busy with an WYSIWYG designer ala visualstudio but have yet
to decide on an serializable format leaning towards xul-alike without
XBL.

You can see a screenshot here: http://infireal.com/external/gradripper.png
and a executable of a utility built using here: http://www.infireal.com/alpha
(generates cairo/svg gradients from images)

Please reply and let your thoughts be known. Is there a need for a new
GUI library for python?



From http  Fri Aug 24 06:47:43 2007
From: http (Paul Rubin)
Date: 24 Aug 2007 03:47:43 -0700
Subject: List Comprehension Question: One to Many Mapping?
References: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
	<7x8x81l9z3.fsf@ruckus.brouhaha.com>
	<mailman.241.1187951774.32294.python-list@python.org>
Message-ID: <7xlkc143ao.fsf@ruckus.brouhaha.com>

Boris Borcic <bborcic at gmail.com> writes:
> >> For example, if I have x=[ [1,2], [3,4] ]
> >>
> >> What I want is a new list of list that has four sub-lists:
> >>
> >> [[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]]
> > [[a, map(f,a)] for a in x]
> 
> no, that one will be [[[1,2], [f(1), f(2)]], [[3,4], [f(3), f(4)]]]
> eg two sublists instead of four.

Oh ugh, I misread the original request and thought the extra brackets
were there.  I think the following works and is reasonably intuitive:

    from itertools import chain
    y = list(chain(*([a, map(f,a)] for a in x)))

But the original request itself seems a bit weird.


From seun.osewa at gmail.com  Sat Aug 11 00:43:16 2007
From: seun.osewa at gmail.com (Seun Osewa)
Date: Sat, 11 Aug 2007 04:43:16 -0000
Subject: The Future of Python Threading
In-Reply-To: <1186802188.653072.236260@x40g2000prg.googlegroups.com>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<1i2njyp.1o6yslqe7ff47N%luc@honk-honk.com>
	<1186782710.600889.245930@j4g2000prf.googlegroups.com>
	<1186802188.653072.236260@x40g2000prg.googlegroups.com>
Message-ID: <1186807396.988368.201400@b79g2000hse.googlegroups.com>

> I think I've heard Guido say the last attempt at removing the Global
> Interpreter Lock (GIL) resulted in a Python that was much slower...

What is it about Python that makes a thread-safe CPython version much
slower?  Why doesn'ttrue threading slow down other languages like Perl
and Java?

I'm thinking it might be the reference counting approach to memory
management... but what do you guys think is the reason?



From seb.buchoux at gmail.com  Sun Aug 19 09:37:49 2007
From: seb.buchoux at gmail.com (=?ISO-8859-1?Q?Buchoux_S=E9bastien?=)
Date: Sun, 19 Aug 2007 15:37:49 +0200
Subject: Hot subject: a good python editor and/or IDE?
In-Reply-To: <5iqreuF3qanv6U1@mid.individual.net>
References: <mailman.2162.1187525764.22759.python-list@python.org>
	<5iqreuF3qanv6U1@mid.individual.net>
Message-ID: <46C847AD.50709@gmail.com>

Bjoern Schliessmann wrote:
> S?bastien wrote:
>   
>> I am currently using Eclipse+PyDev when developping Python
>> projects but I lack a fast, simple editor for tiny bit of scripts.
>> So here is my question: what is, for you, the current best ( but
>> still kind of light! ) Python editor/IDE ?
>>     
>
> vim
>
> BTW, this is an FAQ. Please look through the archives for many
> threads with many, many IDEs.
>
> Regards,
>
>
> Bj?rn
>
>   
Yeah, I know this is a FAQ, but, as you mention, there is a whole bunch 
of editors, every one of them being updated constantly (+ the new ones 
getting out). So I am quite sure that looking through the archives is 
THE solution since it will only reflect what people thought when 
question was asked. Just type "best Python editor" on Google and you 
will see that almost all hits are completely out of date.
Fair enough though! ;)


From horpner at yahoo.com  Thu Aug  2 15:04:22 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 02 Aug 2007 19:04:22 GMT
Subject: __call__ considered harmful or indispensable?
References: <mailman.1527.1186079415.22759.python-list@python.org>
Message-ID: <slrnfb4asc.24c.horpner@FIAD06.norwich.edu>

On 2007-08-02, skip at pobox.com <skip at pobox.com> wrote:
> I don't personally use __call__ methods in my classes, but I
> have encountered it every now and then here at work in code
> written by other people.  The other day I replaced __call__
> with a more obvious method name, so now instead of executing
>
>     obj(foo, bar, baz)
>
> the code in question is
>
>     obj.execute(foo, bar, baz)
>
> In this case there was a bug.  Depending on inputs, sometimes
> obj initialized to a class, sometimes an instance of that
> class.  (I fixed that too while I was at it.)  The problem was
> that the use of __call__ obscured the underlying bug by making
> the instance as well as the class callable.
>
> In this particular case it was clearly unnecessary and just
> obfuscated the code.  I'm wondering, are there some general
> cases where __call__ methods of a user-defined class are simply
> indispensable?

In C++ they are called functors, and they are very useful as
surrogate functions with state. I haven't seen them used in the
same way in Python much, because Python has more immediate
solutions to (most of) these problems.

Here's a (somewhat goofy) example:

class is_consecutive(object):
  def __init__(self, seed, compare=operator.lt):
    self.last_value = seed
    self.compare = compare
  def __call__(self, total, value):
    if total is False:
      return False
    lv = self.last_value
    self.last_value = value
    return self.compare(lv, value):

a = range(15)

>>> reduce(is_consecutive(0), a)
True
>>> reduce(is_consecutive(0), a + [1,2])
False

It's been a while since I had to be in the STL mindset, so I
couldn't think of a better example.

-- 
Neil Cerutti
This is not a book to be put down lightly. It should be thrown with great
force. --Dorothy Parker


From kyosohma at gmail.com  Tue Aug  7 11:16:09 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 07 Aug 2007 08:16:09 -0700
Subject: Tkinter or wxpython?
In-Reply-To: <hgamo4-p2m.ln1@lairds.us>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
	<7x7io8r6na.fsf@ruckus.brouhaha.com> <hgamo4-p2m.ln1@lairds.us>
Message-ID: <1186499769.560806.295660@x35g2000prf.googlegroups.com>

On Aug 7, 9:00 am, cla... at lairds.us (Cameron Laird) wrote:
> In article <7x7io8r6na.... at ruckus.brouhaha.com>,
> Paul Rubin  <http://phr... at NOSPAM.invalid> wrote:
>                         .
>                         .
>                         .
>
>
>
> >I should also add: there is also the possibility of running a Python
> >program with an embedded http server on the same desktop as the
> >browser, using the browser purely as a gui, but with the Python
> >program having complete access to the file system and so forth.  This
> >could be seen as combining the disadvantages of both the remote web
> >server approach (i.e. gui elements constrained by the browser) and the
> >all-desktop approach (deployment issues).  However, a lot of the time
> >it's still just plain easier to do.  Whenever I've written a desktop
> >gui app I've always just been shocked at how much time goes into
> >making the gui look decent and do the right stuff, even though none of
> >mine have been even slightly slick (they've all been for industrial
> >applications).  When I do a web gui, it's been just a matter of
> >tossing some html into a file or into some print statements, viewing
> >it in a browser, and tweaking it a little as needed.  Maybe that's
> >mostly a matter of the lousy state of gui toolkits, and we actually
> >need a toolkit that's more like an embedded browser.  But we don't
> >have that at the moment.
>
> One key to Tkinter's longevity lurks there.  While
> many whine about the antiquity of the appearance of
> Tkinter's widgets, they have the virtue of sensible
> defaults; more than any other toolkit, Tkinter comes
> up with minimal refinements in a sensible and
> consistent state.  While those with an artistic eye
> assure me the simplest Tkinter programs look worse
> that corresponding ones built with any other toolkit,
> they behave the most coherently in regards to resizing
> and so on.

I am curious. What are these "sensible defaults" that you mention?

If you set up a wxPython program's sizers appropriately, the program
should resize logically. But I think Tkinter is a little bit easier in
that respect. However, you can get pretty granular in how you want
items to behave in wxPython that you may not be able to do in Tkinter.
I just don't know.

I've used both, so I'm interested in hearing your opinion.

Mike



From horpner at yahoo.com  Tue Aug 14 08:03:55 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 14 Aug 2007 12:03:55 GMT
Subject: Module imports during object instantiation
References: <4c3vo4-u7k.ln1@learner.hq.netapp.com> <f9pcuj$6n4$1@sea.gmane.org>
	<mailman.1931.1187030415.22759.python-list@python.org>
	<46c16ec9$0$405$426a34cc@news.free.fr>
	<mailman.1956.1187091452.22759.python-list@python.org>
Message-ID: <slrnfc36p9.21o.horpner@FIAD06.norwich.edu>

On 2007-08-14, Ritesh Raj Sarraf <rrs at researchut.com> wrote:
> Bruno Desthuilliers wrote:
>
>>>> What's leading you to conclude the import isn't being executed? You
>>>> realise, I trust, that the module's code will only be executed on the
>>>> first call to __init__()?
>>>>
>>> 
>>> Well. Putting it in a "try" inside __init__() doesn't do anything.
>> 
>> This would be highly suprising.
>>
>
> Yes, it is surprising. Unfortunately. :-(
> Or maybe I'm doing something really dumb.
>  
>>> The
>>> import never happens.
>> 
>> As soon as your running this code on a platform where os.name yields
>> either 'nt' or 'dos', the import statement is executed. You can bet your
>> ass on this. Now this import can fail for a lot of reasons (imported
>> module not in sys.path, error in the imported module, etc), and since
>> your catching *and dismissing* the ImportError, you don't know what
>> effectively happens. It's like someone send you mails, you set your
>> filter to trash mails from this person, and then complain this person
>> never send you mails !-)
>> 
>>> And thus if I make a call in any of the methods, it
>>> fails with an error message. A NameError IIRC.
>> 
>> "IIRC" ? Inspecting the traceback may help, you know.
>
> There's no traceback because the import never happens.
>
> Here's what I've captured for you exactly I see on my terminal
>
>
> rrs at learner:/tmp$ cat rick.py
> class Log:
>     def __init__(self, verbose, lock = None):
>         self.VERBOSE = bool(verbose)
>         self.lock = bool(lock)
>
>         if self.lock:
>             self.dispLock = threading.Lock()
>         else:
>             self.dispLock = None
>
>         if os.name == 'posix':
>             try:
>                 import foobar
>             except ImportError, e:
>                 print >> sys.stderr, e
>
>             self.platform = 'posix'
>             self.color = get_colors()
>
>         elif os.name in ['nt', 'dos']:
>             self.platform = 'microsoft'
>             try:
>                 import SomeModule
>             except ImportError, e:
>                 # comment out next line before going to prod...
>                 print >> sys.stderr, e
>
>                 self.color = None
>             else:
>                 self.color = SomeModule.get_colors_windows()
>         else:
>             self.platform = None
>             self.color = None
> rrs at learner:/tmp$ python
> Python 2.4.4 (#2, Jul 21 2007, 11:00:24)
> [GCC 4.1.3 20070718 (prerelease) (Debian 4.1.2-14)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import os, sys
>>>> os.path.abspath(os.curdir)
> '/tmp'
>>>> from rick import Log
>>>> import rick
>>>> os.name
> 'posix'
>>>> import foobar
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ImportError: No module named foobar
>>>>
>
>
>
> For the 'posix' OS, I'm doing an erratic import which should fail and print
> the error message.
>
> See, it prints nothing. This _is_ what has made me conclude
> that imports aren't executed in __init__(). But hey, they will
> get executed if you put them in any of the methods (which is
> again illogical because methods can/are called multiple times).

If you want an import inside an __init__ to run, you must call
the __init__ function that contains it.

>>> log = rick.Log()

You'll get another surprise when you do this, though. ;)

-- 
Neil Cerutti


From Brian.McCann at viziant.net  Mon Aug 20 15:54:07 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Mon, 20 Aug 2007 15:54:07 -0400
Subject: reading a line in file
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx><2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com><93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx>
	<2dc0c81b0708201207p7f83f2e0l6de15fd70be252a5@mail.gmail.com>
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE2B6@efmailx>

Shawn, Tim ,Jay
 
many thanks,
 
It looks like there are many ways this problem can be approached

either by using  regex or a tokens 

Tim I'm not familiar with your solution, but will learn about that method also
Jay, what do you mean by regex comes with a lot of overhead?

--Brian
 
 

________________________________

From: python-list-bounces+brian.mccann=viziant.net at python.org on behalf of Shawn Milochik
Sent: Mon 8/20/2007 3:07 PM
To: python-list at python.org
Subject: Re: reading a line in file



Hopefully this will help (using your input file)

#!/usr/bin/env python
import re
buildinfo = "input.txt"
input = open(buildinfo, 'r')

regex = re.compile(r"^\s*build.number=(\d+)\s*$")

for line in input:
    if re.search(regex, line):
        print line
        buildNum = re.sub(r"^\s*build.number=(\d+)\s*$", "\\1", line)
        print line
        print buildNum
--
http://mail.python.org/mailman/listinfo/python-list


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From aafshar at gmail.com  Tue Aug 14 06:00:20 2007
From: aafshar at gmail.com (Ali)
Date: Tue, 14 Aug 2007 10:00:20 -0000
Subject: Assignments and Variable Substitution
In-Reply-To: <mailman.1947.1187053596.22759.python-list@python.org>
References: <f9q2qn$i4v$1@solaris.cc.vt.edu>
	<cfb58d850708131223y37ccb61y465fc2f964ad05e4@mail.gmail.com>
	<mailman.1947.1187053596.22759.python-list@python.org>
Message-ID: <1187085620.641516.269590@b79g2000hse.googlegroups.com>

On Aug 14, 12:45 am, Steve Holden <st... at holdenweb.com> wrote:
> Evan Klitzke wrote:
> > On 8/13/07, brad <byte8b... at gmail.com> wrote:
> >> I'd like to do something like this:
>
> >> var = '123'
> >> %s = [], %var

> And why would you want a variable whose name is '123'?

... and thus continues the search for private variables in Python.




From cai.haibin at gmail.com  Wed Aug 22 03:13:40 2007
From: cai.haibin at gmail.com (james_027)
Date: Wed, 22 Aug 2007 07:13:40 -0000
Subject: creating a dictionary from a dictionary with regex
Message-ID: <1187766820.785959.170190@r23g2000prd.googlegroups.com>

Hi,

I am trying to create a dictionary from a dictionary which the help of
regex to identify which keys to select. I have something like this but
I feel its long and not the fastest solution ... could someone
contribute?

import re

d= {'line2.qty':2, 'line3.qty':1, 'line5.qty':12, 'line2.item':'5c-BL
Battery', 'line3.item':'N73', 'line5.item':'Screen Cover'}

collected = [k[:5] for k in d if re.match('^line\d+\.qty',k)]

for i in collected:
    d2 = {}
    for k in d:
        if re.match('^%s\.\D+' % i, k):
            d2[k] = d[k]
    print d2

Thanks
james



From google at mrabarnett.plus.com  Fri Aug 31 12:49:31 2007
From: google at mrabarnett.plus.com (MRAB)
Date: Fri, 31 Aug 2007 09:49:31 -0700
Subject: list index()
In-Reply-To: <slrnfdfpve.ldo.jon+usenet@snowy.squish.net>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<1188497498.3468.60.camel@dot.uniqsys.com>
	<mailman.188.1188546300.28954.python-list@python.org>
	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
	<1188551958.728836.137370@x35g2000prf.googlegroups.com>
	<fOadnfwlCJbQfErbnZ2dnUVZ_jCdnZ2d@speakeasy.net>
	<slrnfdfpve.ldo.jon+usenet@snowy.squish.net>
Message-ID: <1188578971.748594.206140@d55g2000hsg.googlegroups.com>

On Aug 31, 11:05 am, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> On 2007-08-31, Erik Max Francis <m... at alcyone.com> wrote:
>
> >> I say the 'oll' in troll like the 'ol' in frolic, and pronounce roll
> >> and role similarly.
>
> >> My accent is probably from the East Midlands of the UK, but is not
> >> pronounced.
>
> > _Troll_ and _frolic_ aren't pronounced with the same "o" sound in any
> > accent I've ever heard of.
>
> Welcome to England!
>
> > Which you pronounce _boat_ and _bot_ the same way, too?
>
> No. HTH HAND.
>
For some, "troll" rhymes with "roll", for others, with "doll". Does it
matter?

As for the pronunciation of "Python", let's ask Guido! :-)



From catherine.devlin at gmail.com  Fri Aug 17 16:41:34 2007
From: catherine.devlin at gmail.com (Catherine)
Date: Fri, 17 Aug 2007 20:41:34 -0000
Subject: round-trip from egg to code and back to egg
Message-ID: <1187383294.003703.193230@x35g2000prf.googlegroups.com>

I'd like to use Scriptaculous with TurboGears on Python 2.5.
Unfortunately, Scriptaculous is currently in the Cheese Shop only as a
Python 2.4 egg.

If I had the setup.py that was used to generate the egg, I think it
would be really easy to generate a new Python 2.5 egg from the
existing 2.4 egg.  In fact, it would be gruntwork we could easily
offload from the package authors.

The trouble is, an egg doesn't include setup.py.  Is there any direct
way to round-trip a Python package from egg to installed code and into
a new egg?  I might be able to mine enough information from the files
in EGG-INFO to reconstruct setup.py - reverse-engineering - but that
seems unnervingly like work.

Three possibilities come to mind -

1. I'm missing something simple
2. setuptools could be modified to include the original setup.py with
the egg
3. a script could mine EGG-INFO to regenerate setup.py - maybe such a
script has already been written?

Can somebody who understands eggs better comment?

Thanks very much!
- Catherine
http://catherinedevlin.blogspot.com



From zyzhu2000 at gmail.com  Sat Aug 18 21:46:57 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Sun, 19 Aug 2007 01:46:57 -0000
Subject: How to make a module function visible only inside the module?
In-Reply-To: <1i32pg7.b0y3h92vjygwN%raims@dot.com>
References: <1187484334.091530.90420@m37g2000prh.googlegroups.com>
	<1i32pg7.b0y3h92vjygwN%raims@dot.com>
Message-ID: <1187488017.198905.242610@j4g2000prf.googlegroups.com>

On Aug 18, 8:27 pm, ra... at dot.com (Lawrence Oluyede) wrote:
> beginner <zyzhu2... at gmail.com> wrote:
> > Is there any equivalent version of C's static function in Python. I
> > know I can make a class function private by starting a function name
> > with two underscores, but it does not work with module functions.
>
> The trick for the name mangling does not work at module level. Anyway,
> if you read the PEP 8 [1] you can correctly write your code following a
> well known coding standard. A function like this:
>
> def _f():
>     pass
>
> is meant to be private, you can also state it in the function's
> docstring to be more clear, if you want, but it's not necessary
>
> > For exmaple, __func1 is still visible outside the module.
>
> Yes, and _f() will also be. There's no such thing as enforcing
> encapsulation in Python, even the "__method()" trick can be easily
> bypassed if you have to.
>
> 1 - <http://www.python.org/dev/peps/pep-0008/>
>
> HTH
>
> --
> Lawrence, oluyede.org - neropercaso.it
> "It is difficult to get a man to understand
> something when his salary depends on not
> understanding it" - Upton Sinclair

Thanks a lot. I was using two underscores, __module_method() as my
static method convention, and then I had some problems calling them
from inside class methods.



From zyzhu2000 at gmail.com  Thu Aug 16 15:28:03 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Thu, 16 Aug 2007 19:28:03 -0000
Subject: Help me!!
In-Reply-To: <1187292365.988491.249170@i38g2000prf.googlegroups.com>
References: <1187291279.545324.205610@i38g2000prf.googlegroups.com>
	<1187292365.988491.249170@i38g2000prf.googlegroups.com>
Message-ID: <1187292483.879788.130890@m37g2000prh.googlegroups.com>

On Aug 16, 2:26 pm, beginner <zyzhu2... at gmail.com> wrote:
> > Some one help me so that
> > If ab = [a,b,c,d]
> > and cd = [a,c]
> > my global list file should be [A,b,C,d]

If there is a lot of entries in the list, I would consider using an
indexed data structure such as dict.


ab=['a','b','c','d']
cd=['a','c']
common=[x.upper() for x in ab if x in cd]
ab_minus_cd=[x for x in ab if x not in cd]
cd_minus_ab=[x for x in ab if x not in cd]
requested_list = common+ab_minus_cd+cd_minus_ab- Hide quoted text -



From http  Mon Aug 27 00:11:03 2007
From: http (Paul Rubin)
Date: 26 Aug 2007 21:11:03 -0700
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csi2tn49esmc3@corp.supernews.com>
	<mailman.230.1187928865.32294.python-list@python.org>
	<13csqk47j0c56b0@corp.supernews.com>
	<CqSdnRl2x8928FPbnZ2dnUVZ_jSdnZ2d@speakeasy.net>
	<13ct7v3qn2v5206@corp.supernews.com>
	<mailman.238.1187948359.32294.python-list@python.org>
	<13d49lk6ue2as6d@corp.supernews.com>
	<13d4hutad1dq699@corp.supernews.com>
Message-ID: <7xk5rhvcq0.fsf@ruckus.brouhaha.com>

"bambam" <david at asdf.asdf> writes:
> Is it safe to write
> A = [x for x in A if x in U]
> or is that undefined? I understand that the slice operation
> can be used to make a temporary copy, so I could write
> A=[x for x in A[:] if x in U]
> but I've just copied that without any understanding.

You get a temporary copy either way; note you're going to linearly
search U on every pass.  Maybe you want:

   SU = set(u)
   A = [a for x in A if x in SU]

or possibly

   A = list(set(A) & set(U))

which will remove duplicate elements from A and not necessarily keep
them in the same order, but is likely to be fastest of the bunch.


From conra2004 at yahoo.com  Thu Aug 16 03:48:20 2007
From: conra2004 at yahoo.com (yadin)
Date: Thu, 16 Aug 2007 00:48:20 -0700
Subject: ploting issues in program
Message-ID: <1187250500.571837.196940@19g2000hsx.googlegroups.com>

hi every one!

can you please help me to fix these polar plot in db's
so that the center is at the minimun negative number in voltagedb
about [-50]
and the maximun is at zero and how can i see values on the axis like
showing that the axes start at -50 -40 -30 .....and end at zero
than you
 here is the program
import wx
import os
from wx.lib.colourdb import *
from pylab import*
angteta =  [ 4.36332313e-003, 3.18522588e-001, 6.32681854e-001,
9.46841119e-001,
             1.26100038e+000, 1.57515965e+000, 1.88931892e+000,
2.20347818e+000,
             2.51763745e+000, 2.83179671e+000, 3.14595598e+000,
3.46011524e+000,
             3.77427451e+000, 4.08843377e+000, 4.40259304e+000,
4.71675230e+000,
             5.03091157e+000, 5.34507083e+000, 5.65923010e+000,
5.97338936e+000,]

voltage =  [ 0.00363471, 0.26569155, 0.52562334, 0.76330428,
0.93673361, 1.        ,
             0.93321713, 0.75733232, 0.5185449 , 0.25840091,
0.00363471, 0.26569155,
             0.52562334, 0.76330428, 0.93673361, 1.        ,
0.93321713, 0.75733232,
             0.5185449 , 0.25840091,]

#voltagedb = 20*log10(voltage)

voltagedb =  [-48.7906044 ,-11.51244516, -5.58650713, -2.34604603,
-0.56767793,  0.        ,
              -0.60034598, -2.41427014,
-5.7042726 ,-11.75411924,-48.7906044 ,
              -11.51244516, -5.58650713, -2.34604603, -0.56767793,
0.        ,
              -0.60034598, -2.41427014, -5.7042726 ,-11.75411924,]
polar(angteta,voltagedb)

show()



From ricaraoz at gmail.com  Mon Aug 13 15:21:44 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Mon, 13 Aug 2007 16:21:44 -0300
Subject: python 2.5 bug
In-Reply-To: <1186884626.597028.246990@57g2000hsv.googlegroups.com>
References: <1186825286.493878.80380@l70g2000hse.googlegroups.com>	<MPG.2127cabf99116e6a9896fe@news.individual.de>
	<1186884626.597028.246990@57g2000hsv.googlegroups.com>
Message-ID: <46C0AF48.20307@bigfoot.com>

Dustan wrote:
> On Aug 11, 12:32 am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
>> 4. don't do something you don't fully understand (in this case
>>    installing Python 2.5 and uninstalling Python 2.4)
> 
> If we were all limited by that rule, none of us would never have used
> a computer in the first place. Operating a computer is a learning
> experience, no matter what level you're at (although admittedly the
> lessons learned can sometimes be hurtful).
> 

Hi, I'm new to python. I'm male 48yo have a daughter, divorced. Live in
BA. Read Introduct me python and am at page 56 of shafting python the
right way. Have 220v alternate current (notice ! not 110v), my computer
is dirty, used to be whitish, got an epson printer (stylus c65). My
computer table is wood and some plastic. It's 16:05 and we are +4GMT
here, temp is 17Centigrades and no wind.
Ok. The question is....... shit, I forgot the question! Get to you later.

;c)





From zyzhu2000 at gmail.com  Mon Aug 20 14:03:58 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Mon, 20 Aug 2007 18:03:58 -0000
Subject: 'REPL' style IDE
In-Reply-To: <1187632249.748945.158910@i13g2000prf.googlegroups.com>
References: <1187632249.748945.158910@i13g2000prf.googlegroups.com>
Message-ID: <1187633038.373751.244700@i38g2000prf.googlegroups.com>

On Aug 20, 12:50 pm, beginner <zyzhu2... at gmail.com> wrote:
> Hi Everyone,
>
> I am using the Wing IDE. It works great when developing applications,
> but the workflow is like Visual Studio -- after you execute it or
> debug it, the python script ends.
>
> What I want is an interactive interpreting environment. I want the IDE
> to execute a boot script to initialize my environment and create some
> basic data objects. And then I want to be able to type in command on
> the command line using these objects. The IDLE that comes with Python
> does this, but compared with Wing, it does not have a lot of the
> convenient features.
>
> I am wondering if there is anything more powerful than IDLE that can
> do this.
>
> Thanks,
> Geoffrey

If Wing could load my init script into a python session ONCE and then
run my code in another files MANY times, with or without the debugger,
without starting a new python session, that would be great.



From omari at smileystation.com  Mon Aug  6 15:28:22 2007
From: omari at smileystation.com (Omari Norman)
Date: Mon, 6 Aug 2007 15:28:22 -0400
Subject: encode() question
In-Reply-To: <1185900791.595830.21290@d55g2000hsg.googlegroups.com>
References: <1185900791.595830.21290@d55g2000hsg.googlegroups.com>
Message-ID: <20070806192822.GA22360@cameron>

On Tue, Jul 31, 2007 at 09:53:11AM -0700, 7stud wrote:
> s1 = "hello"
> s2 = s1.encode("utf-8")
> 
> s1 = "an accented 'e': \xc3\xa9"
> s2 = s1.encode("utf-8")
> 
> The last line produces the error:
> 
> ---
> Traceback (most recent call last):
>   File "test1.py", line 6, in ?
>     s2 = s1.encode("utf-8")
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position
> 17: ordinal not in range(128)
> ---
> 
> The error is a "decode" error, and as far as I can tell, decoding
> happens when you convert a regular string to a unicode string.  So, is
> there an implicit conversion taking place from s1 to a unicode string
> before encode() is called?  By what mechanism?

Yep. You are trying to encode a string. The problem is that strings are
already encoded, so it generally makes no sense to call .encode() on
them. 

.encode()ing a string can be handy if you want to convert its encoding.
In such a case, though, Python will first convert the string to Unicode.
To do that, it has to know how the string is encoded. Unless you tell it
otherwise, Python assumes the string is encoded in ascii. You had a byte
in there that was out of ascii's range...thus, the error. Python was
trying to decode the string, assumed it was ascii, but that didn't work.

This is all very confusing; I'd highly recommend reading this bit about
Unicode. It started me down the difficult road of actually understanding
what is going on here.

http://www.joelonsoftware.com/articles/Unicode.html


-- 
It's another Baseline Boulder Morning.


From tjreedy at udel.edu  Fri Aug 31 17:12:38 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 31 Aug 2007 17:12:38 -0400
Subject: [python 3.0] reload() gone?
References: <61d0e2b40708311110l5a13819fh4e6b2aafe928b44d@mail.gmail.com>
Message-ID: <fba085$p89$1@sea.gmane.org>


"Bernard Lebel" <3dbernard at gmail.com> wrote in message 
news:61d0e2b40708311110l5a13819fh4e6b2aafe928b44d at mail.gmail.com...
|I read in the Python 3.0 documentation that reload() was removed,
| without further explanations.
|
| http://docs.python.org/dev/3.0/whatsnew/3.0.html?highlight=reload

The .a1 release docs are a bit skimpy in places.  Reload() often does not 
do what people want or expect.

| So what are we supposed to do to reload modules?

He once said he was working on a replacement that he was first testing on 
himself.  I guess it did not make .a1.


tjr





From tn.pablo at gmail.com  Mon Aug 20 21:59:39 2007
From: tn.pablo at gmail.com (Pablo Torres)
Date: Mon, 20 Aug 2007 18:59:39 -0700
Subject: Any advice on ways for sharing a small Python application with
	the world?
In-Reply-To: <1187647187.137812.158130@22g2000hsm.googlegroups.com>
References: <1187647187.137812.158130@22g2000hsm.googlegroups.com>
Message-ID: <1187661579.868574.219860@50g2000hsm.googlegroups.com>

On Aug 20, 4:59 pm, Bert Heymans <bert.heym... at gmail.com> wrote:
> Hi,
>
> I made a Python cli application for resizing batches of images based
> on the PIL. You can find it herehttp://heymans.org/pyresize.html
>
> It's just an straight forward command line interface application but I
> guess many people would find a use for it, it can be used as a module
> as well. There's lots of comments in the code and a chunk of
> documentation.
>
> This post is a way to get the word out, I blogged about it (http://
> blog.heymans.org) and submitted it to the Vaults of Parnassus (http://
> py.vaults.ca/) does anyone know of other ways to share something that
> might just be too small for a sourceforge project but too big to be a
> snippet?
>
> Thanks!
>
> Cheers
>
> Bert Heymans

www.uselesspython.com is not as useless as it sounds. I think it's
popular enough.



From rNOSPAMon at flownet.com  Tue Aug 21 03:42:45 2007
From: rNOSPAMon at flownet.com (Ron Garret)
Date: Tue, 21 Aug 2007 00:42:45 -0700
Subject: Is there a way to change the default string encoding?
References: <rNOSPAMon-7D5934.18443820082007@news.gha.chartermi.net>
	<fadvvr$ogf$00$1@news.t-online.com>
Message-ID: <rNOSPAMon-33A664.00424521082007@news.gha.chartermi.net>

In article <fadvvr$ogf$00$1 at news.t-online.com>,
 Peter Otten <__peter__ at web.de> wrote:

> If all else fails there's
> 
> >>> sys.setdefaultencoding("latin1")
> >>> "Andre\xe9 Ramel".decode()
> u'Andre\xe9 Ramel'
> 
> but that's an evil hack, you should rather talk to the maintainer of the
> offending code to update it to accept unicode.

Yes, but I need to hack around it until I can get it fixed.

Thanks!

rg


From gregturn at mindspring.com  Wed Aug 29 10:36:45 2007
From: gregturn at mindspring.com (Goldfish)
Date: Wed, 29 Aug 2007 07:36:45 -0700
Subject: Creating a multi-tier client/server application
In-Reply-To: <46d57888$0$295$426a74cc@news.free.fr>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
	<46d57888$0$295$426a74cc@news.free.fr>
Message-ID: <1188398205.836630.280570@19g2000hsx.googlegroups.com>

Perhaps Spring Python can help you out (http://springpython.python-
hosting.com). It reuses technologies like Pyro for remoting, offers
database templates, has a plugable security component, an AOP solution
should the need arise, an IoC container, and has a couple of web-app
demos using CherryPy. Of course, you can use whatever web stack you
want. I just picked CherryPy to demo things.

Each component of Spring Python is optional, and you can use it
through the IoC container, or programatically. This might help you
leverage development of an enterprise app.

BTW, I have plans to implement a wxPython front end sample app. I just
haven't done it yet.

Good luck!



From deets at nospam.web.de  Sun Aug 19 05:58:37 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 19 Aug 2007 11:58:37 +0200
Subject: Symbolic Link
In-Reply-To: <1187505140.524645.314920@d55g2000hsg.googlegroups.com>
References: <1187475296.173269.263080@k79g2000hse.googlegroups.com>
	<5ipbc3F3q94rmU1@mid.uni-berlin.de>
	<1187505140.524645.314920@d55g2000hsg.googlegroups.com>
Message-ID: <5iqiinF3q07dgU1@mid.uni-berlin.de>

mosscliffe schrieb:
> On 18 Aug, 23:49, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> mosscliffe schrieb:
>>
>>
>>
>>> I am trying to create a link to a file, which I can then use in an
>>> HTML page.
>>> The system is Linux on a hosted web service, running python 2.3.
>>> Other than that I have no knowledge of the system.
>>> The link is created OK, but when I try to use it as filename for the
>>> IMG TAG, it does not get displayed.  The page source of the created
>>> page is pointing to the link as temp/test1.jpg
>>> Any ideas ?
>>> srcFile = "temp/test2.jpg"
>>> linkFile = "temp/test1.jpg"
>>> if os.path.islink(linkFile):
>>>     print "Link Exists", nl
>>>     pass
>>> else:
>>>     print "Making Link", nl
>>>     os.symlink(srcFile, linkFile)
>>> print '<BR><img src="%s">the image</IMG><BR><BR>' % linkFile
>>> print '<img src="%s">the image</IMG>' % srcFile
>> In what environment is that script running? If it's apache, it might be
>> that the apache settings disallow for following links.
>>
>> Diez
> 
> It is Apache.
> 
> Can I create some override in the current directory.  I am afraid my
> Apache skills are almost zero.

As are mine. At least from the top of my head. You better ask in a more 
apache-centric forum.

Diez


From bscrivener42 at gmail.com  Thu Aug  2 07:27:31 2007
From: bscrivener42 at gmail.com (BartlebyScrivener)
Date: Thu, 02 Aug 2007 04:27:31 -0700
Subject: i am new to python-Please somebody help
In-Reply-To: <1186047103.673871.150460@z24g2000prh.googlegroups.com>
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com>
Message-ID: <1186054051.011105.196620@i13g2000prf.googlegroups.com>

On Aug 2, 4:31 am, cool.vimalsm... at gmail.com wrote:
>
> i want the packages file with
> a ".gz" extension by implementing a python program

http://docs.python.org/lib/module-gzip.html



From skip at pobox.com  Fri Aug  3 19:23:25 2007
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 3 Aug 2007 23:23:25 +0000 (UTC)
Subject: =?utf-8?b?X19jYWxsX18=?= considered harmful or indispensable?
References: <mailman.1527.1186079415.22759.python-list@python.org>	<46b24200$0$19638$426a74cc@news.free.fr><mailman.1554.1186108869.22759.python-list@python.org>
	<46b2e0c2$0$14572$426a74cc@news.free.fr>
	<f8vtcd$clv$1@sea.gmane.org>
Message-ID: <loom.20070804T012215-203@post.gmane.org>

Terry Reedy <tjreedy <at> udel.edu> writes:

> > The bug went something like this:
> >
> >     obj = some.default_class
> >     ...
> >     if some_other_rare_condition_met:
> >         ... several lines ...
> >         obj = some.other_class()
> 
> Should that have been some.other_class (without the ()s?).

Either that or default value should have been an instance of
some.default_class.  Didn't really matter in this case...

Skip




From kevin.t.ryan at gmail.com  Tue Aug 28 22:46:17 2007
From: kevin.t.ryan at gmail.com (Kevin T. Ryan)
Date: Wed, 29 Aug 2007 02:46:17 -0000
Subject: Compiling Source with alternate Openssl lib
In-Reply-To: <1188324598.687927.169350@d55g2000hsg.googlegroups.com>
References: <1188324598.687927.169350@d55g2000hsg.googlegroups.com>
Message-ID: <1188355577.552009.101640@g4g2000hsf.googlegroups.com>

On Aug 28, 2:09 pm, "Kevin T. Ryan" <kevin.t.r... at gmail.com> wrote:
> Hi All -
>
> I'm trying to compile Python on a Centos machine (RHEL) 3.8 for a
> hosting account that I just set up and I'm having 2 issues:
>
> 1.  I ran into an issue with the "hashlib" module [I think] because it
> bumps it up against an *OLD* openssl lib (like, Feb. 2003).  So I
> installed a newer openssl lib, but when I recompiled python it still
> used the old library.  So I tried ./configure again with the flag: "-
> with-openssl-libs=/new/directory" but it still didn't work.  Any idea
> how I might be able to remedy this?  I have a working solution right
> now: I've commented out the last 2 lines of hashlib.py, but I'd rather
> not do that if I didn't have to.
>
> 2.  As part of this process, I installed "easy_install" and I was
> trying to download psycopg2 but I got the error: "PyDateTimeAPI
> defined but not used" when trying to compile.  I've had this problem
> before when trying to compile psycopg2 and it was because I didn't
> have the postgres header libs installed (libpq-dev) ... but that's on
> a debian box, and I can't figure out how to fix it on the RHEL one.
>
> I know the 2nd question might not belong in this group, but I thought
> I'd ask just in case someone ran into this before or might have any
> suggestions.
>
> Thanks in advance (as always!) for your help!
>
> Kevin

In case this helps anyone, I figured it out ... unfortunately, my dumb
a$$ didn't install Postgres before I tried to install the psycopg2
module!  I then still had issues, but after adding the postgres 'lib'
directory to the ld.so.config file (eg, cat "/dir/to/pgsql/lib" >> /
etc/ld.so.config and running ldconfig all is well!  Thanks,



From bignose+hates-spam at benfinney.id.au  Sat Aug 25 10:11:50 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 26 Aug 2007 00:11:50 +1000
Subject: curses library
References: <mailman.1980.1187115104.22759.python-list@python.org>
Message-ID: <873ay7itzt.fsf@benfinney.id.au>

Ghirai <ghirai at ghirai.com> writes:

> Are there any wrappers around curses/ncurses?

Python has its own 'curses' module in the standard library of course.

    <URL:http://docs.python.org/lib/module-curses>

That's if you want to work directly with the curses functionality,
which is rather low-level.

> Or any other similar libraries?

The library that I always think of when I think "Python ncurses
wrapper" is:

    Urwid is a console user interface library for Python.

    <URL:http://excess.org/urwid/>

Available as a package (e.g. 'python-urwid') in most GNU/Linux
distributions, or you can install it from the download link.

-- 
 \       "Pity the meek, for they shall inherit the earth."  -- Donald |
  `\                                              Robert Perry Marquis |
_o__)                                                                  |
Ben Finney


From raims at dot.com  Thu Aug 16 18:43:03 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Fri, 17 Aug 2007 00:43:03 +0200
Subject: How to say $a=$b->{"A"} ||={} in Python?
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
Message-ID: <1i2ysn4.7ue1uud53iygN%raims@dot.com>

beginner <zyzhu2000 at gmail.com> wrote:
> I'd like to do the following in more succint code:
> 
> if k in b:
>     a=b[k]
> else:
>     a={}
>     b[k]=a

b.setdefault(k, a)

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From lists at liquidtrust.org  Wed Aug 22 16:19:17 2007
From: lists at liquidtrust.org (Charlie)
Date: Wed, 22 Aug 2007 14:19:17 -0600
Subject: MsiLib
Message-ID: <20070822141917.kbgih09joc0ko0ws@74.220.202.27>

Thanks for pointing that out. It solved the one problem and along came  
another. Now I get the following error when I try running it. Thanks  
for the help.

Traceback (most recent call last):
   File "msi.py", line 7, in <module>
     record = view.Fetch()
_msi.MSIError: function failed



From deets at nospam.web.de  Thu Aug  2 13:20:33 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 02 Aug 2007 19:20:33 +0200
Subject: standalone process to interact with the web
In-Reply-To: <46b20019$0$18576$426a74cc@news.free.fr>
References: <1185899130.331170.151980@e16g2000pri.googlegroups.com>
	<mailman.1375.1185900147.22759.python-list@python.org>
	<1185904623.754078.198910@e9g2000prf.googlegroups.com>
	<mailman.1379.1185905472.22759.python-list@python.org>
	<1185909098.952860.217190@j4g2000prf.googlegroups.com>
	<46b05aac$0$31743$426a74cc@news.free.fr>
	<1186059016.461925.295520@e16g2000pri.googlegroups.com>
	<46b20019$0$18576$426a74cc@news.free.fr>
Message-ID: <5hei3dF3kaamsU1@mid.uni-berlin.de>

Bruno Desthuilliers schrieb:
> beginner a ?crit :
>> On Aug 1, 5:04 am, Bruno Desthuilliers <bruno.
>> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>>> beginner a ?crit :
>>> (snip)
>>>
>>>> Yes exactly. I just don't want to reinvent the wheel as I imagine
>>>> there are already tons of libraries and frameworks that support RPC or
>>>> the like functions.
>>> Why go thru the pain of RPC, SOAP or such bloated horrors ? Why not just
>>> use plain old HTTP with a RESTful API ? Then you just need to make your
>>> app wsgi compliant.
>>
>> I am not familiar with RESTful API. I will look into it.
>>
> It's nothing else than the correct use of the HTTP protocol. And it's 
> much more simpler than all those XMLRPC, SOAP and whatnot monstruosities.

While I'm with you regarding the monstrosity of SOAP, XMLRPC certainly 
isn't among the crappy IPC-protocols. Using it, you get type marshalling 
for some simple, yet important cases for free. Including such things as 
argument-order, and ordered values. Which for example make transmitting 
a dict a trivial operation of transmitting the two sequences of key/values.

I don't see that with REST.

Diez


From titleistfour at gmail.com  Thu Aug  9 12:08:08 2007
From: titleistfour at gmail.com (jay)
Date: Thu, 09 Aug 2007 16:08:08 -0000
Subject: Extending logging module
Message-ID: <1186675688.291944.299060@z24g2000prh.googlegroups.com>

Hello,

I've been using the python logging module a lot lately, and I've come
across an instance where I need some new levels.  Specifically, python
does not include ALERT and NOTICE in the default set of logging
levels.  I am wondering how trivial it would be to extend the logging
module to include these 2 levels that are standard with syslog?

My first test was just to use the addLevelName method to add the two
new levels, but syslog ignores them and logs at the next highest
priority, no matter what I use.

Looking further into the code and as a test, I changed the following
to see if this would even work

lib/python2.5/logging/__init__.py
  -> class Logger
  -> add new notice and alert root level functions
  -> new _levelNames for notice and alert
  -> new default level names for notice and alert

lib/python2.5/logging/handlers.py
  -> class SysLogHandler priority_map was changed to include notice
and alert

It actually worked, but this is not the way I would like to handle the
problem.  I would prefer to extend the classes instead.  However, I'm
not too familiar with that, and I had to change things in so many
places, I'm wondering if its even possible?  I don't like changing the
standard libraries, what happens if I have to upgrade python?  My
changes get overwritten.

Can anyone offer some help or suggestions?  Thanks

Jay



From carsten at uniqsys.com  Fri Aug  3 15:10:45 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 03 Aug 2007 15:10:45 -0400
Subject: downloading files
In-Reply-To: <1186166920.757662.269340@o61g2000hsh.googlegroups.com>
References: <1186166920.757662.269340@o61g2000hsh.googlegroups.com>
Message-ID: <1186168245.3382.52.camel@dot.uniqsys.com>

On Fri, 2007-08-03 at 11:48 -0700, Ehsan wrote:
> I foundd this code in ASPN  Python Cookbook for downloading files in
> python but when it finished downloading files the files became
> corrupted and didn't open, the files in internet havn't any problem:
> 
> 
> def download(url,fileName):
> 	"""Copy the contents of a file from a given URL
> 	to a local file.
> 	"""
> 	import urllib
> 	webFile = urllib.urlopen(url)
> 	localFile = open(fileName, 'w')
> [...]

Try 'wb' instead of 'w'.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From kyosohma at gmail.com  Tue Aug  7 11:21:31 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 07 Aug 2007 08:21:31 -0700
Subject: python system subprocess win32
In-Reply-To: <f9a0on$dee$1@gemini.csx.cam.ac.uk>
References: <f9a0on$dee$1@gemini.csx.cam.ac.uk>
Message-ID: <1186500091.063514.178640@e9g2000prf.googlegroups.com>

On Aug 7, 9:48 am, "mclaugb" <mcla... at nospm.yahoo.com> wrote:
> Hello ALl,
> I have a compiled program "conv.exe" that works as follows:>>conv.exe
>
> -----------------------------
> Please selection from the following options.  press "h" for help, "p" for
> print, "r" for readfile.
> Enter your request now:
> ...
> --------------------
> Is there a way to script python using the subprocess method to start this
> program "conv.exe" and then send a "r" to the command line to make it, say,
> readfile.
>
> I have tried the following but the .communicate("r) is not doing anything
>
> import subprocess
> import time
>
> a=subprocess.Popen("c:\\mcml\\conv.exe")
> time.sleep(1)
> (stdout, stderr) = a.communicate("r")
>
> Many thanks,
> Bryan

Use the sys.argv method. In the code that you have compiled, put the
following lines in:

<code>

import sys
default = sys.argv[1]
if default:
   # check which option it is and run it appropriately
else:
   # print your menu here

</code>

Then you should be able to do the subprocess Popen command:

subprocess.Popen("c:\\mcml\\conv.exe r")

You may need to turn the shell on...

subprocess.Popen("c:\\mcml\\conv.exe r", shell=True)

Hopefully that gives you some ideas anyway.

Mike



From michael at jedimindworks.com  Sun Aug 12 22:04:10 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sun, 12 Aug 2007 19:04:10 -0700
Subject: Binary, Hex, and Decimal string conversions
In-Reply-To: <496954360708121620r4dd68ac9o430326ae8c8ae04d@mail.gmail.co m>
References: <496954360708111559s1cef4212pabd14e95b27435ea@mail.gmail.com>
	<C5FFAC23-F5DC-4112-A508-EC9BDF2FAB43@jedimindworks.com>
	<496954360708121620r4dd68ac9o430326ae8c8ae04d@mail.gmail.com>
Message-ID: <649D1D6C-A44C-4D03-920D-489BBD108789@jedimindworks.com>


On Aug 12, 2007, at 6:28 PM, Dick Moores wrote:

> n = 12
> base = 36
> print to_base(n, base)
> ==========================================
> This seems to work fine for n >= base, but not for n < base. For  
> example, the code shown returns "c". Is my indentation wrong, or  
> the code? It seems to me that the code should work for the general  
> case, not just for n >= base.

Isn't 'c' the correct answer?

Regards,
Michael
---
Simplicity is the ultimate sophistication. -Leonardo da Vinci



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From tenax.raccoon at gmail.com  Thu Aug  9 11:01:00 2007
From: tenax.raccoon at gmail.com (Jason)
Date: Thu, 09 Aug 2007 08:01:00 -0700
Subject: tests
In-Reply-To: <46bb2511$0$10103$7b0f0fd3@mistral.news.newnet.co.uk>
References: <mailman.1792.1186665714.22759.python-list@python.org>
	<1186666919.456036.120270@d30g2000prg.googlegroups.com>
	<f9f70t$dpm$1@solaris.cc.vt.edu>
	<1186670584.148181.180040@r34g2000hsd.googlegroups.com>
	<46bb2511$0$10103$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <1186671660.912133.225810@l70g2000hse.googlegroups.com>

On Aug 9, 8:46 am, "special_dragonfly" <Domi... at PLEASEASK.co.uk>
wrote:
> <dijkstra.ar... at gmail.com> wrote in message
> >http://docs.python.org/lib/module-filecmp.html
>
> My understanding of reading that is that it only looks at the file names
> themselves and not their contents. So whether filename1=filename2 and in the
> case of the function below it, whether one directory has files which are in
> the other.
> Correct me if I'm wrong.
> Dom
>
> P.S. md5 or sha hash is what I'd go for, short of doing:
>
> MyFirstFile=file("file1.xls")
> MySecondFile=file("file2.xls")
> If MyFirstFile==MySecondFile:
>     print "True"
>
> although this won't tell you where they're different, just that they are...

You're incorrect.  If the shallow flag is not given or is true, the
results of os.stat are used to compare the two files, so if they have
the same size, change times, etc, they're considered the same.

If the shallow flag is given and is false, their contents are
compared.  In either case, the results are cached for efficiency's
sake.

  --Jason


The documentation for filecmp.cmp is:
  cmp(  	f1, f2[, shallow])
      Compare the files named f1 and f2, returning True if they seem
equal, False otherwise.

      Unless shallow is given and is false, files with identical
os.stat() signatures are taken to be equal.

      Files that were compared using this function will not be
compared again unless their os.stat() signature changes.

      Note that no external programs are called from this function,
giving it portability and efficiency.



From irmen.NOSPAM at xs4all.nl  Sat Aug  4 13:44:53 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 04 Aug 2007 19:44:53 +0200
Subject: Auto run/Timer
In-Reply-To: <1186216025.768369.240570@j4g2000prf.googlegroups.com>
References: <1186216025.768369.240570@j4g2000prf.googlegroups.com>
Message-ID: <46b4bb1a$0$237$e4fe514c@news.xs4all.nl>

Rohan wrote:
> Hello,
> I would like my script to run once a week with out any external
> interference.
> More like a timer. Can it be done in python or should some other shell
> scripting be used.
> If anyone knows anything please let me know.
> 

Have a look at my 'kronos' task scheduler, available from:
http://www.razorvine.net/downloads.html

Things like this do require a Python process to be running all the time,
for obvious reasons. If you don't want that, you'll have to use a task
scheduler tool that your operating system provides (cron, for instance).

--irmen


From gagsl-py2 at yahoo.com.ar  Mon Aug 27 02:46:16 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 27 Aug 2007 03:46:16 -0300
Subject: Error with Simplemapi.py
References: <1187938985.165186.300780@i38g2000prf.googlegroups.com>
	<mailman.14.1188187230.28954.python-list@python.org>
	<1188194730.024877.120880@q5g2000prf.googlegroups.com>
Message-ID: <op.txpg3e2ix6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 27 Aug 2007 03:05:30 -0300, Mick Duprez <duprez at hinet.net.au>  
escribi?:

> Thank you very much Gabriel, changing the NULL to None did the trick
> (it also helps if I reload the changed module after editing!:( ).

Glad to see it worked.

> Yes
> that is an old script and I will look into your suggestions. Basically
> I'd just like to use the default mail client (windows or Unix/Linux)
> to send simple mail with attachments, this way I can log the
> attachments I send to a db for example for document transmittal/
> register reports etc.

Hmmm... altough you may find some MAPI implementation for Linux, it's very  
uncommon; consider using sendmail instead, or ask for an outbound SMTP  
server and use the smtplib module.

-- 
Gabriel Genellina



From mensanator at aol.com  Mon Aug 27 18:30:16 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Mon, 27 Aug 2007 15:30:16 -0700
Subject: Biased random?
In-Reply-To: <favd0c$fcu$1@ss408.t-com.hr>
References: <favd0c$fcu$1@ss408.t-com.hr>
Message-ID: <1188253816.661391.22460@k79g2000hse.googlegroups.com>

On Aug 27, 3:42 pm, Ivan Voras <ivoras at __fer.hr__> wrote:
> Hi,
>
> I have a list of items, and need to choose several elements from it,
> "almost random". The catch is that the elements from the beginning
> should have more chance of being selected than those at the end (how
> much more? I don't care how the "envelope" of probability looks like at
> this point - can be linear). I see that there are several functions in
> Python standard libraries for various distribution, but is there an easy
> pythonic way to make them do what I need?
>
>  signature.asc
> 1KDownload

If your list is small enough, you could do something
like this:

import random
test = ['a','b','c','d','e','f','g','h','i','j']
temp = []
size = len(test)-1
for i,j in enumerate(test):
  temp.extend(j*(2**(size-i)))
for i in xrange(400):
  if i % 30 == 0: print
  print random.choice(temp),

##  a a b a a a i c a a a b c b b a a a a b a a a d a b a a g f
##  a e a a a i a b a a b c b a a b a b b c b a b a c a a a a a
##  b a a c a c e d b d a a a a a c a b b e a a b a a b a a c a
##  a a a a a a b a b a c a a a c a d a c a a d b b b b d a a a
##  a a d b a a a b a b b a b a c a a a b b a c b c a a c c c a
##  a a b a a a b a b a a a a d c a a b c b b b d b b a a b c a
##  a a a a a a b a d b c d b a b c a d b b b a b a b b b b b a
##  b c a b a a b c a a a a a a a a b a a a b a a a a a d a b b
##  a b b a c a b c a a a a a a a a c b a c c a a e a a a c b b
##  a c e b b a a b c a b a b a a b a g a b e a a a c c a a c b
##  b i a b a a a a c c c b a a a a a b b b a b b a a b b h a a
##  d b a b a b b a a b c a b a a b a a a c a d a a b a b a a a
##  a d a b b a b a a c a b c d b a a d a a b b a a a a a d a c
##  a a a b a a b a c b

Here, 'a' is twice as likely to occur as 'b',
which is twice as likely to occur as 'c',
which is twice as likely to occur as 'd',
etc.



From sjmachin at lexicon.net  Mon Aug 20 09:15:46 2007
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 20 Aug 2007 06:15:46 -0700
Subject: datetime in microseconds
In-Reply-To: <1187610776.755796.170990@r29g2000hsg.googlegroups.com>
References: <1187610776.755796.170990@r29g2000hsg.googlegroups.com>
Message-ID: <1187615746.655162.295570@z24g2000prh.googlegroups.com>

On Aug 20, 9:52 pm, mroelo... at gmail.com wrote:
> Hi I have a time in microseconds, for example 0x8C905CBA7F84AF4. I
> want this to a normal view in hh:mm:ss DD:MM:YYYY. I tried with
> datetime, but it only takes a max of 1000000 microseconds is there
> another solution?

Your question can be interpreted in two possible ways:

1. You have an interval or duration (independent of a calendar point)
and you want to express it in years, months, days, hours, etc. This is
not possible, due to the variable number of days in a month. The best
that you can do is express it as days, hours, etc.

>>> microsecs = 0x8C905CBA7F84AF4
>>> secs = microsecs // 1000000 # or round to nearest if you prefer
>>> mins, secs = divmod(secs, 60)
>>> hrs, mins = divmod(mins, 60)
>>> days, hrs = divmod(hrs, 24)
>>> days, hrs, mins, secs
(7326893L, 11L, 1L, 16L)
>>>

2. You want to know the (Gregorian) calendar point that is
0x8C905CBA7F84AF4 microseconds after some epoch. In this case you need
to specify what the epoch is. Then you can try something like:

>>> datetime.datetime.fromordinal(1) + datetime.timedelta(microseconds=microsecs
)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OverflowError: date value out of range
>>> # Whoops!
>>> years_approx = days / 365.25
>>> years_approx
20059.939767282682
>>>

Hmmm, one of us seems to be missing something ...



From Shawn at Milochik.com  Mon Aug 20 11:35:45 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Mon, 20 Aug 2007 11:35:45 -0400
Subject: regular expression dictionary search
In-Reply-To: <d6a0d8f10708181139m730d7aa6t1c9f6e624d6db9aa@mail.gmail.com>
References: <d6a0d8f10708181139m730d7aa6t1c9f6e624d6db9aa@mail.gmail.com>
Message-ID: <2dc0c81b0708200835v4cd32bd4k9a443cc4feef879a@mail.gmail.com>

#!/usr/bin/env python

import re

patterns = { 'sho.' : 6, '.ilk' : 8, '.an.' : 78 }

def returnCode(aWord):
    for k in patterns:
        p = "^%s$" % k
        regex = re.compile(p)
        if re.match(regex, aWord):
            return patterns[k]

if __name__ == "__main__":

    print "The return for 'fred' : %s" % returnCode('fred')
    print "The return for 'silk' : %s" % returnCode('silk')
    print "The return for 'silky' : %s" % returnCode('silky')
    print "The return for 'hand' : %s" % returnCode('hand')
    print "The return for 'strand' : %s" % returnCode('strand')
    print "The return for 'bank' : %s" % returnCode('bank')


Note: If a word matches more than one pattern, only one will be returned.

I'm not sure if I'm doing the patterns thing properly -- if anyone
could instruct me on whether it would be proper to declare it in the
function, or use a global declaration, please let me know. However, it
runs properly as far as I tested it.

Shawn


From gtcopeland at gmail.com  Tue Aug 21 09:24:00 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: 21 Aug 2007 06:24:00 -0700
Subject: IDE for Python
In-Reply-To: <mailman.55.1187690455.32294.python-list@python.org>
References: <mailman.55.1187690455.32294.python-list@python.org>
Message-ID: <1187702024.675011.324020@q4g2000prc.googlegroups.com>

On Aug 21, 5:00 am, Joel Andres Granados <joel.grana... at gmail.com>
wrote:
> Hello list:
>
> I have tried various times to use an IDE for python put have always been
> disapointed.
> I haven't revisited the idea in about a year and was wondering what the
> python people
> use.
> I have also foundhttp://pida.co.uk/mainas a possible solution.  Anyone
> tried it yet?
>
> suggestions.
> Regards
> Joel Andres Granados
>
>  joel.granados.vcf
> 1KDownload


Have you tried SPE?  I don't know how it compares to PyDev but SPE is
pretty slick.  It has several other tools integrated into it,
including a pretty nice debugger.  It's fairly small and loads mucho
faster than Eclipse ever will.  Best of all SPE is written completely
in Python.

http://pythonide.blogspot.com/
http://sourceforge.net/projects/spe

Personally I use XEmacs at the expense of some of the nicer IDE
features.


Greg



From michele.simionato at gmail.com  Wed Aug 29 22:39:14 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Thu, 30 Aug 2007 02:39:14 -0000
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <pan.2007.08.29.23.17.34.304019@datallegro.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<pan.2007.08.29.23.17.34.304019@datallegro.com>
Message-ID: <1188441554.884249.50110@22g2000hsm.googlegroups.com>

On Aug 30, 1:17 am, Dan Stromberg - Datallegro
<dstromb... at datallegro.com> wrote:
> IMO, putting Programming by Contract into python as part of the language
> itself, or as a simple module, is a little bit like a company or
> department coming up with a mission statement.  It's easy to say that it's
> meaningless, and some will ignore it, but it still kind of sets the tone
> for how things "should be done".

I disagree. IMO automatic testing is thousands of times better than
design by contract and Python has already all the support you need
(unittest, doctest, py.test, nose, ...)


                     Michele Simionato



From seanttierney at gmail.com  Wed Aug 15 09:00:05 2007
From: seanttierney at gmail.com (Sean Tierney)
Date: Wed, 15 Aug 2007 06:00:05 -0700
Subject: Combinatorial of elements in Python?
In-Reply-To: <e9adacf30708150539h25ce36acyee5cff404f29a78a@mail.gmail.com>
References: <9e2f512b0708142203m782b0e10s817fb4d061ba0e46@mail.gmail.com>
	<46C2ED11.70904@freakmail.de>
	<e9adacf30708150539h25ce36acyee5cff404f29a78a@mail.gmail.com>
Message-ID: <54e1e4bc0708150600o40a6b979ta6b8497e20ddf0a7@mail.gmail.com>

Hi Team,

I'm trying to get Python hooked up to MySQL using MySQL-python-1.2.2

Details:
Mac OS X 10.4.x
Python2.5
MySQL 5.x.x
MySQL-python-1.2.2
gcc

Target: i686-apple-darwin8
Configured with: /private/var/tmp/gcc/gcc-5250.obj~12/src/configure
--disable-checking -enable-werror --prefix=/usr --mandir=/share/man
--enable-languages=c,objc,c++,obj-c++
--program-transform-name=/^[cg][^.-]*$/s/$/-4.0/
--with-gxx-include-dir=/include/c++/4.0.0
--build=powerpc-apple-darwin8 --with-arch=pentium-m
--with-tune=prescott --program-prefix= --host=i686-apple-darwin8
--target=i686-apple-darwin8
Thread model: posix
gcc version 4.0.1 (Apple Computer, Inc. build 5250)

When I run $ python setup.py build, I get this message:

~/Desktop/MySQL-python-1.2.2 SeanThomas$ python setup.py build
running build
running build_py
copying MySQLdb/release.py -> build/lib.macosx-10.3-fat-2.5/MySQLdb
running build_ext
building '_mysql' extension
gcc -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk
-fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd
-fno-common -dynamic -DNDEBUG -g -O3 -Dversion_info=(1,2,2,'final',0)
-D__version__=1.2.2
-I/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5
-c _mysql.c -o build/temp.macosx-10.3-fat-2.5/_mysql.o
_mysql.c:35:23: error: my_config.h: No such file or directory
_mysql.c:41: error: parse error before string constant
_mysql.c:78: error: parse error before 'MYSQL'
_mysql.c:78: warning: no semicolon at end of struct or union
_mysql.c:81: error: parse error before '}' token
_mysql.c:81: warning: data definition has no type or storage class
_mysql.c:92: error: parse error before 'MYSQL_RES'
_mysql.c:92: warning: no semicolon at end of struct or union
_mysql.c:96: error: parse error before '}' token
_mysql.c:96: warning: data definition has no type or storage class
_mysql.c:108: error: parse error before '*' token
_mysql.c: In function '_mysql_Exception':
_mysql.c:122: error: 'c' undeclared (first use in this function)
_mysql.c:122: error: (Each undeclared identifier is reported only once
_mysql.c:122: error: for each function it appears in.)
_mysql.c:125: error: 'CR_MAX_ERROR' undeclared (first use in this function)
_mysql.c:133: error: 'CR_COMMANDS_OUT_OF_SYNC' undeclared (first use
in this function)

....~100+ or more lines of error message then it ends with:

lipo: can't figure out the architecture type of: /var/tmp//cc1VlbOG.out
error: command 'gcc' failed with exit status 1


Can someone point me in the right direction?

Thanks, and Happy Wednesday.


From gheize at gmail.com  Mon Aug 27 11:13:46 2007
From: gheize at gmail.com (Guillermo Heizenreder)
Date: Mon, 27 Aug 2007 12:13:46 -0300
Subject: getLabel() CD-ROM
Message-ID: <1188227626.15011.17.camel@leinad-desktop>

Hi list, I'm new whit pygtk library.

I'm interest to know if there is a class in the graphics library that it
can provide me with information about the CD-ROM label ( something
similar to class KMount in the graphic library pykde[1]).

At the time I'm using pycdio class[2],but i don't wont to my application
by dependent on the above class mentioned.

Thanks and kind regards from Argentina.

P/D: my English it to bad, I'm a novice. 

[1]http://www.riverbankcomputing.com/Docs/PyKDE3/classref/allclasses.html
[2]http://pypi.python.org/pypi/pycdio/0.12




-- 
Heizenreder Guillermo
http://code.google.com/u/gheize/



From http  Wed Aug 29 01:17:39 2007
From: http (Paul Rubin)
Date: 28 Aug 2007 22:17:39 -0700
Subject: Creating a multi-tier client/server application
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
Message-ID: <7xbqcqhqbw.fsf@ruckus.brouhaha.com>

Jeff <jeff.fw at gmail.com> writes:
> Here's a broad overview of what I need to do:  cross-platform, client-
> side GUI apps that interact with a server backed by a database.  I'd
> also like the possibility of having a web interface for small portions
> of the app.  ...  any advice on anything I've mentioned
> (or haven't?) 

Why not do the entire app as a web app, completely bagging the client
side and just using a browser?  It will help your deployment problems
a lot, and using https will help with security since it looks like the
app will be transmitting sensitive data.  It also will simplify your
networking questions a lot since you're just writing a server.

See the big debate between Chris Mellon and me a few weeks ago about
web apps vs client gui apps.  Yes you can get a level of
responsiveness from a client app that can't easily be done with a web
app.  However, relatively few client gui business apps that I've
personally used really seem better than the equivalent things done as
web apps in the obvious way.

I would certainly prototype the app as a web app, and then think about
writing a client gui only if it was clear that usability would really
benefit from it.  Even still, the server would still look like a web
server, translating xml requests into database actions and responding
with xml.

> I want to plan this application out as thoroughly
> as possible before writing any code, 

There is a school of thought (sometimes associated with "extreme
programming") that this is more planning than you should really do.
Think of a cross-country automobile trip.  Figure out the general
route you want to take, then get in the car and go, making low-level
decisions as you get to them, rather than trying to plan every gas and
rest and restaurant stop before you leave.


From attn.steven.kuo at gmail.com  Mon Aug 20 18:02:05 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Mon, 20 Aug 2007 22:02:05 -0000
Subject: Python equivalent of Perl's $/
In-Reply-To: <mailman.27.1187641700.32294.python-list@python.org>
References: <mailman.9.1187619031.26576.python-list@python.org>
	<1187637588.073514.202930@x40g2000prg.googlegroups.com>
	<mailman.27.1187641700.32294.python-list@python.org>
Message-ID: <1187647325.321147.70810@j4g2000prf.googlegroups.com>

On Aug 20, 1:02 pm, John K Masters <johnmast... at oxtedonline.net>
wrote:
> On 19:19 Mon 20 Aug     , attn.steven.... at gmail.com wrote:
>
>
>
> > import StringIO
>
> > text = """\
> > To mimic Perl's input record separator in
> > Python, you can use a generator.
> > And a substring test.
> > Perhaps something like the following
> > is what you wanted.
> > """
>
> > mockfile = StringIO.StringIO(text)
>
> > def genrecords(mockfile, sep=".\n"):


(snipped)

>
> Thanks, this also looks like a good way to go but ATM beyond my level of
> Python knowledge. I've not reached the generator chapter yet but I'll
> flag the message and return later.
>
> Regards, John


Some features in Perl can be found in Python, so if you know
the former, then learning the latter ought to go smoothly.  In
any case, here's an updated version of the generator that
avoid repeating an unncessary string search:

def genrecords(mockfile, sep=".\n"):
    """
    """
    buffer = ""
    while True:
        idx = buffer.find(sep) + len(sep)
        while idx >= len(sep):
            yield buffer[:idx]
            buffer = buffer[idx:]
            idx = buffer.find(sep) + len(sep)
        rl = mockfile.readline()
        if rl == "":
            break
        else:
            buffer = '%s%s' % (buffer, rl)
    yield buffer
    raise StopIteration

--
Regards,
Steven








From steve at holdenweb.com  Thu Aug  9 11:52:51 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Aug 2007 11:52:51 -0400
Subject: Stackless Integration
In-Reply-To: <46bb1df0$0$403$426a74cc@news.free.fr>
References: <mailman.1786.1186660119.22759.python-list@python.org>
	<46bb1df0$0$403$426a74cc@news.free.fr>
Message-ID: <f9fd8h$q2t$1@sea.gmane.org>

Bruno Desthuilliers wrote:
> Jean-Paul Calderone a ?crit :
>> On Thu, 09 Aug 2007 09:00:27 -0000, "Justin T." <jmtulloss at gmail.com> 
>> wrote:
>>> Hi,
>>>
>>> I've been looking at stackless python a little bit, and it's awesome.
>>> My question is, why hasn't it been integrated into the upstream python
>>> tree? Does it cause problems with the current C-extensions? It seems
>>> like if something is fully compatible and better, then it would be
>>> adopted. However, it hasn't been in what appears to be 7 years of
>>> existence, so I assume there's a reason.
>> It's not Pythonic.
> 
> Hum... Yes ? Really ? Care to argument ?

Unfortunately such arguments quickly descend to the "yes it is", "no it 
isn't" level, as there is no objective measure of Pythonicity.

Twisted is a complex set of packages which is difficult to understand 
from the outside,and is motivated by a specific approach to asynchronous 
operations that is neither well understood by the majority of 
programmers nor easily-explained to them. All the teaching sessions on 
Twisted I have attended have involved a certain amount of hand-waving or 
some over-heavy code examples with inadequate explanations.

However I would say that Twisted has improve enormously over the last 
five years, and should really be a candidate for inclusion in the 
standard library. It would be a large component, though, and so there 
would be a number of heavy tasks involved, not least of them updating 
the documentation. So maintenance might be a worry unless a group stood 
up and committed to the task.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From jwaixs at gmail.com  Wed Aug  8 04:10:39 2007
From: jwaixs at gmail.com (Noud Aldenhoven)
Date: Wed, 8 Aug 2007 08:10:39 +0000
Subject: passing vars to py scipts in cron jobs
In-Reply-To: <20070807220209.GX22017@lass.lfod.us>
References: <f9ap96$60d$1@solaris.cc.vt.edu>
	<20070807220209.GX22017@lass.lfod.us>
Message-ID: <cb63d1e10708080110o39887c6ai1ca88257c30599a5@mail.gmail.com>

On 8/7/07, Will Maier <willmaier at ml1.net> wrote:
>
> On Tue, Aug 07, 2007 at 05:45:46PM -0400, brad wrote:
> > What's the proper way to call a py script and pass in variables
> > while doing cron jobs? I can run the scripts fine from idle,
> > python, etc using raw_input() to prompt users. The scripts have
> > classes with methods that need arguments.
>
> This is commonly done with either sys.argv (a list of arguments
> passed when invoking the script) or os.environ (a dictionary of
> environment variables and values). Use either to instantiate your
> classes or run functions.



You might also want to look at the function getopt <
http://docs.python.org/lib/module-getopt.html>.
It's used to parse the variables in sys.argv which makes it (in my opinion)
more user friendly.

-- 
<:3 )~
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From aboudouvas at panafonet.gr  Fri Aug 10 11:34:15 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Fri, 10 Aug 2007 08:34:15 -0700
Subject: Ipc mechanisms and designs.
Message-ID: <1186760055.658942.116300@x40g2000prg.googlegroups.com>

Hi,

inspired of the topic "The Future of Python Threading", i started to
realize that the only way to utilize the power of multiple cores using
Python, is spawn processes and "communicate" with them.

If we have the scenario:

1. Windows (mainly) development
2. Processes are running in the same machine
3. We just want to "pass" info from one process to another. Info may
be simple data types or user defined Python objects.

what is the best solution (besides sockets) that someone can implement
so to have 2 actually processes that interchanged data between them ?
I looked at Pyro and it looks really good but i wanted to experiment
with a simpler solution.



From steve at holdenweb.com  Fri Aug 24 00:00:37 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 24 Aug 2007 00:00:37 -0400
Subject: creating a tar file with python
In-Reply-To: <46CE51E1.9020608@holdenweb.com>
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>	<faktv8$8fs$1@sea.gmane.org>	<93066C069973ED448DC2BCEA9C44A7383BE2ED@efmailx>	<46CE4D3D.7020106@holdenweb.com>	<93066C069973ED448DC2BCEA9C44A7383BE2EE@efmailx>
	<46CE51E1.9020608@holdenweb.com>
Message-ID: <46CE57E5.9080908@holdenweb.com>

Steve Holden wrote:
> Brian McCann wrote:
>>  
>> <mailto:brian.mccann at viziant.net>
>> Steve,
>>  
>> I ran the code as you suggested, didn't work, tried variations of it 
>> didn't work,
>> If you don't know the answer don't pretend you do!
>>
>> Apology not accepted, please don't wake up!
>>
>> Future correspondence on any python questions from you go to trash.
>> May your pillow not have pity on your head!
>>  
> Well in that case it might have been a good idea to post the error 
> message you got from trying what I suggested rather than the one you got 
> from your fifteenth variation on my (admittedly untested) suggestion.
> 
> Not to worry, I know not to try and help you any further.
> 
> Sorry my limited Python experience wasn't able to help you solve your 
> problem.
> 
> [plonk]
> 
> regards
>   Steve
> 
> PS: this reply is *much* more polite than the one that first came to 
> mind, which involved making suggestions involving sex and travel. You're 
> on your own from here on in. I don't like being incited to spew 
> profanity on a list of people I respect.

I see you *did* post it, but then followed up with personal mail 
complaining about your lack of success and quoting another unsuccessful 
attempt to get your program working. naturally I received that before 
reading c.l.py and seeing the post I missed.

I'm not a fucking computer, you know.  There, you *have* goaded me into 
profanity. So now I'm going to follow the only sensible suggestion 
you've made and get some sleep. Feel better now?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From gagsl-py2 at yahoo.com.ar  Sun Aug  5 06:29:16 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 05 Aug 2007 07:29:16 -0300
Subject: File Handling & TRY/EXCEPT
References: <33119.3366124809$1186129744@news.gmane.org>
	<f8va2a$8od$1@sea.gmane.org>
	<13677.732498809$1186148538@news.gmane.org>
Message-ID: <op.twk0q21qx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 03 Aug 2007 10:38:17 -0300, Robert Rawlins - Think Blue  
<robert.rawlins at thinkbluemedia.co.uk> escribi?:

> Thanks for your ideas guys,
>
> I'm unfortunately tied to 2.4 so don't have the full try except status,  
> but
> I'm now working with the following code:
>
> 	def addApp(self, event):
> 		try:
> 			logfile =
> open('/pblue/new/Logs/Application.csv','a')
>
> 			now = datetime.datetime.now()
> 			logstring = '%s,%s \n' % (event, str(now))
> 			
> 			try:				
> 				logfile.write(logstring)
> 			finally:
> 				logfile.close()
> 		except:
> 			self.addApp(event)
>
> I'm trying to slowly debug my app and get rid of all the memory leaks,  
> but
> its pain staking work, any help you can offer on that stuff would be a  
> god
> send, I'm a little reluctant about posting all my app code on the lists  
> as
> I'd like to keep some of it private.
>
> How does that new version look? A little tidier?

If the logging error is rather permanent (disk full) or a programming  
error (e.g. you forget to import datetime) this will cause an infinite  
recursion. Don't try to log again, at least not the same way.
The version below writes to the console when a logging error happens. And  
note the reordered open/try/finally: you want to ensure that after a call  
to open, no matter what happens, the file will be closed.

def addApp(self, event):
     try:
         now = datetime.datetime.now()
         logstring = '%s,%s \n' % (event, str(now))
         logfile = open('/pblue/new/Logs/Application.csv','a')
         try:
             logfile.write(logstring)
         finally:
             logfile.close()
     except:
         print >>sys.stderr, "%s: %s while attempting to log event '%s'" % (
             sys.exc_info()[0], sys.exc_info()[1], event)


-- 
Gabriel Genellina



From horpner at yahoo.com  Sat Aug 11 18:18:12 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Sat, 11 Aug 2007 22:18:12 GMT
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
	<46B8626A.2070303@bigfoot.com>
	<mailman.1726.1186537161.22759.python-list@python.org>
	<5hsoi3F3mlni2U1@mid.individual.net> <f9ceb9$jsm$1@sea.gmane.org>
	<1186581124.3383.55.camel@dot.uniqsys.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
	<slrnfbk19k.20o.horpner@FIAD06.norwich.edu>
	<1i2nhxn.tme05x17r39odN%aleax@mac.com>
	<m3hvi.37606$G23.6240@newsreading01.news.tds.net>
Message-ID: <EAqvi.37622$G23.4722@newsreading01.news.tds.net>

> On 2007-08-11, Alex Martelli <aleax at mac.com> wrote:
>> Neil Cerutti <horpner at yahoo.com> wrote:
>>    ...
>>> The Python Language Reference seems a little confused about
>>> the terminology.
>>> 
>>>   3.4.7 Emulating numeric types
>>>   6.3.1 Augmented assignment statements
>>> 
>>> The former refers to "augmented arithmetic operations", which
>>> I think is a nice terminology, since assignment is not
>>> necessarily taking place. Then the latter muddies the waters.
>>
>> Assignment *IS* "necessarily taking place"; if you try the
>> augmented assignment on something that DOESN'T support
>> assignment, you'll get an exception.  Consider:
>>
>>>>> tup=([],)
>>>>> tup[0] += ['zap']
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>> TypeError: 'tuple' object does not support item assignment
>>
>> Tuples don't support item ASSIGNMENT, and += is an ASSIGNMENT,
>> so tuples don't allow a += on any of their items.
>>
>> If you thought that += wasn't an assignment, this behavior and
>> error message would be very problematic; since the language
>> reference ISN'T confused and has things quite right, this
>> behavior and error message are perfectly consistent and clear.
>
> Thanks for the correction. I was under the illusion that
> sometimes augmented assignment would instead mutate the object.

OK, I've thought about this some more and I think the source of
my confusion was I thought assignment in Python meant binding a
name to something, not mutating an object. But in the case of
augmented assignment, assignment no longer means that?

-- 
Neil Cerutti


From kyosohma at gmail.com  Mon Aug 27 09:36:45 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 27 Aug 2007 06:36:45 -0700
Subject: wxpython on FreeBSD 6.2 broken
In-Reply-To: <mailman.7.1188131743.28954.python-list@python.org>
References: <mailman.7.1188131743.28954.python-list@python.org>
Message-ID: <1188221805.256643.185610@o80g2000hse.googlegroups.com>

On Aug 26, 7:35 am, Michael S <msherma... at yahoo.com> wrote:
> Good day all,
>
> I was wondering if anyone was using the latest
> wxpython on FreeBSD 6. I just installed it yesterday
> as well as wxGlade. wxGlade doesn't function properly
> - it does not display any controls. I then tried some
> simple examples from the web and half of them don't
> work.
>
> Anyone aware of this?
> Michael

I'm not, but the wxpython group might. Try posting there:
http://www.wxpython.org/maillist.php

Mike



From ldo at geek-central.gen.new_zealand  Wed Aug 29 03:42:19 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Wed, 29 Aug 2007 19:42:19 +1200
Subject: tempfile.mkstemp and os.fdopen
References: <1188323759.955043.317630@19g2000hsx.googlegroups.com>
	<Michael.J.Fromberger-8FC07C.15483428082007@localhost>
Message-ID: <fb37s6$p1s$1@lust.ihug.co.nz>

In message <Michael.J.Fromberger-8FC07C.15483428082007 at localhost>, Michael
J. Fromberger wrote:

> ... since os.fdopen() only has access to the file descriptor, it
> does not have a convenient way to obtain the file's name.

You can do this under Linux as follows:

    os.readlink("/proc/%d/fd/%d" % (os.getpid(), fileno))



From mal at egenix.com  Sat Aug 25 16:35:59 2007
From: mal at egenix.com (M.-A. Lemburg)
Date: Sat, 25 Aug 2007 22:35:59 +0200
Subject: Filemaker interactions
In-Reply-To: <1186004514.108975.119380@e9g2000prf.googlegroups.com>
References: <1186004514.108975.119380@e9g2000prf.googlegroups.com>
Message-ID: <46D092AF.80800@egenix.com>

On 2007-08-01 23:41, Ian Witham wrote:
> Hello,
> 
> I'm hoping someone here can put me on the right track with some broad
> concepts here.
> 
> What I am hoping to achieve is a simple HTML page to be served over
> our company LAN, into which the users (Real Estate Agents) can enter a
> property address or reference number.
> 
> My next thought was to have a Python CGI script query our filemaker
> database of property listings, construct a PDF from the relevant
> information, and finally return this PDF to the user.
> 
> At no stage do I want the user to have unfettered access to the
> database or the ability to alter/delete records.
> 
> My question is: what is the most appropriate way for my script to
> interact with Filemaker? Can this be done with Filemaker Pro 6?
> 
> According to the Filemaker Help, the "Local Data Access Companion"
> shares the FileMaker Pro database with ODBC-compliant applications on
> the same computer. Is this the right option?
> 
> Can my CGI script be an ODBC client? How? Would it need to be
> Filemaker specific code or does ODBC have a standardised format?
> 
> I'm grateful for any advice and a nudge in the right direction.

You could try our mxODBC extension for Python which will
likely just work out of the box:

https://www.egenix.com/products/python/mxODBC/

with the Filemaker ODBC driver.

Or give this module a try (if you have more time at hand
and can do without a DB-API interface):

http://www.lfd.uci.edu/~gohlke/code/filemaker.py.html

It uses Filemaker's XML interface.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Aug 25 2007)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


   eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
    D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
           Registered at Amtsgericht Duesseldorf: HRB 46611


From stefan.behnel-n05pAM at web.de  Sun Aug 19 13:01:38 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sun, 19 Aug 2007 19:01:38 +0200
Subject: Sorting a list of Unicode strings?
In-Reply-To: <1187542237.139346.6910@o80g2000hse.googlegroups.com>
References: <1187542237.139346.6910@o80g2000hse.googlegroups.com>
Message-ID: <46C87772.2010603@web.de>

oliver at obeattie.com wrote:
> Hey Guys,

... and girls - maybe ...


> Maybe I'm missing something fundamental here, but if I have a list of
> Unicode strings, and I want to sort these alphabetically, then it
> places those that begin with unicode characters at the bottom.

That's because "Unicode" is more than one alphabet. unicode objects compare
based on the Unicode character value, so sort() does alike.

Stefan


From oliver at obeattie.com  Sat Aug  4 18:43:39 2007
From: oliver at obeattie.com (oliver at obeattie.com)
Date: Sat, 04 Aug 2007 15:43:39 -0700
Subject: Encoding DeprecationWarning
In-Reply-To: <mailman.1623.1186255457.22759.python-list@python.org>
References: <1186254427.792114.173170@q75g2000hsh.googlegroups.com>
	<mailman.1623.1186255457.22759.python-list@python.org>
Message-ID: <1186267419.999613.209480@q75g2000hsh.googlegroups.com>

>>> from wt.lib.misc_lists import all_countries
__console__:1: DeprecationWarning: Non-ASCII character '\xc3' in file /
Django/wt/../wt/lib/misc_lists.py on line 141, but no encoding
declared; see http://www.python.org/peps/pep-0263.html for details



From ldo at geek-central.gen.new_zealand  Fri Aug 31 23:32:22 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 15:32:22 +1200
Subject: Non-Blocking IO
References: <1188614575.647228.248640@k79g2000hse.googlegroups.com>
Message-ID: <fbambh$r7q$4@lust.ihug.co.nz>

In message <1188614575.647228.248640 at k79g2000hse.googlegroups.com>, mp
wrote:

> Calling try3() yields the error:
>   File "./test.py", line 54, in try3
>     print os.read(fout.fileno(),256)
> OSError: [Errno 35] Resource temporarily unavailable

That's what's supposed to happen. That's telling you there are no bytes
currently available to be read.


From tim at tdw.net  Thu Aug  2 11:41:55 2007
From: tim at tdw.net (Tim Williams)
Date: Thu, 2 Aug 2007 16:41:55 +0100
Subject: beginner in python
In-Reply-To: <B80152222.64.37491.2@mxextra>
References: <B80152222.64.37491.2@mxextra>
Message-ID: <9afea2ac0708020841j1d196dc8n5f6fc8ecbddfa146@mail.gmail.com>

On 02/08/07, Beema shafreen <beema.shafreen at gmail.com> wrote:
> Hi everybody ,
>       I am a beginner in python,
>          I have to fetch the redundant entries from a file,
>
> code:
>
> import re
> L = []
> fh = open('ARCHITECTURE_MAIN.txt',
> 'r')
> for line in fh.readlines():
>         data =line.strip()
> #       splitted = data.split('#')
>         L.append(data)
> fh.close()
>
>
>
> M=L
> for x in L:
>         x = x.split('#')
>         for y in M:
>             y = y.split('#')
>         x_data = x[0],x[1],x[2],x[3]
>         #print x_data
>         y_data = y[0],y[1],y[2],y[3]
>         #print y_dat
>         if x_data[0] == y_data[0]:
>               print x_data
>
>
> i get the result as a tupule,
> the text file which has datas separated by hash
> entry#isoform#start#stop#  i have to check upto this
>
> 00250_1#ARCH_104#61#89#Literature#9224948#00250####
> 00250_1#ARCH_104#97#126#Literature#9224948#00250####
> 00250_1#ARCH_104#139#186#Literature#9224948#00250####
> 00251_1#ARCH_463#7#59#SMART##00251####
> 00251_1#ARCH_463#91#121#SMART##00251####
> 00251_1#ARCH_463#251#414#SMART##00251####
> 00251_1#ARCH_463#540#624#SMART##00251####
> 00252_1#ARCH_474#1#21#Literature#8136357#00252####
> 00252_1#ARCH_393#481#501#Literature#8136357#00252####
> 00252_1#ARCH_463#523#553#SMART##00252####
> 00253_1#ARCH_82#37#362#SMART##00253####
> 00253_1#ARCH_54#365#522#SMART##00253####
> 00253_1#ARCH_104#589#617#SMART##00253####
> 00253_1#ARCH_104#619#647#SMART##00253####
> 00253_1#ARCH_104#684#712#SMART##00253####
> 00254_1#ARCH_82#27#352#SMART##00254####
> 00254_1#ARCH_54#355#510#SMART##00254####
> 00254_1#ARCH_104#576#604#SMART##00254####
> 00254_1#ARCH_104#606#634#SMART##00254####
> 00254_1#ARCH_104#671#699#SMART##00254####
> 00255_1#ARCH_82#56#425#SMART##00255####
> 00255_1#ARCH_54#428#582#SMART##00255####
> 00255_1#ARCH_104#696#724#SMART##00255####
>
>
>
>
> can you suggest me ,what are the improvement i have to make in the above
> code
> regards
> shafreen

Shafreen,   your code snippet (as you posted it) prints any lines that
end with an entry code equal the entry code on the last line of the
file, with these lines split at #.

The whole thing (as you posted it) could probably be written something
like this:

===================
# not tested or optimised

fh = open('ARCHITECTURE_MAIN.txt').read().splitlines()
last_code = fh[-1].split('#')[0]
for line in fh:
        if out_line.startswith(last_code):
            print out_line.split('#')
# it will always print at least the last line of the file
===================

HTH :)


From Shawn at Milochik.com  Fri Aug 17 13:47:16 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Fri, 17 Aug 2007 13:47:16 -0400
Subject: Making a copy (not reference) of a file handle,
	or starting stdin over at line 0
Message-ID: <2dc0c81b0708171047w7af563ael9c430f38a266bea7@mail.gmail.com>

I wrote a script which will convert a tab-delimited file to a
fixed-width file, or a fixed-width file into a tab-delimited. It reads
a config file which defines the field lengths, and uses it to convert
either way.

Here's an example of the config file:

1:6,7:1,8:9,17:15,32:10

This converts a fixed-width file to a tab-delimited where the first
field is the first six characters of the file, the second is the
seventh, etc. Conversely, it converts a tab-delimited file to a file
where the first six characters are the first tab field, right-padded
with spaces, and so on.

What I want to do is look at the file and decide whether to run the
function to convert the file to tab or FW. Here is what works
(mostly):

x = inputFile.readline().split("\t")
inputFile.seek(0)

if len(x) > 1:
    toFW(inputFile)
else:
    toTab(inputFile)


The problem is that my file accepts the input file via stdin (pipe) or
as an argument to the script. If I send the filename as an argument,
everything works perfectly.

If I pipe the input file into the script, it is unable to seek() it. I
tried making a copy of inputFile and doing a readline() from it, but
being a reference, it makes no difference.

How can I check a line (or two) from my input file (or stdin stream)
and still be able to process all the records with my function?

Thanks,
Shawn


From Shawn at Milochik.com  Mon Aug 20 16:35:33 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Mon, 20 Aug 2007 16:35:33 -0400
Subject: reading a line in file
In-Reply-To: <46C9F88A.9090400@jayloden.com>
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>
	<2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx>
	<2dc0c81b0708201207p7f83f2e0l6de15fd70be252a5@mail.gmail.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2B6@efmailx>
	<46C9F561.50405@jayloden.com>
	<2dc0c81b0708201314q727ca3a1s12bef74a25b20abc@mail.gmail.com>
	<46C9F88A.9090400@jayloden.com>
Message-ID: <2dc0c81b0708201335m1a158176o9ea456778d2a8597@mail.gmail.com>

Although you're technically correct, I think there's a knee-jerk
anti-regex reaction, citing the meaningless overhead. If you're
running many thousands of records or something then it becomes a small
issue compared to a replace statement or something. But in most cases
it makes no difference at all.

Run the example script both ways and I'm sure there will be no
difference, and I prefer a clear regex to a convoluted (in my opinion)
substring call.

In any case, it's a preference, and I have never seen anything which
convinced me that one should avoid regexes at all costs unless there's
no other way to do it.

And the comment about solving a problem by using regular expressions
creating another problem is just asinine.  Like so many other things,
it's often repeated without any thought about whether it is true in
general, much less in the situation in question.


From steven.bethard at gmail.com  Tue Aug  7 12:50:10 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 07 Aug 2007 10:50:10 -0600
Subject: Adding a list of descriptors to a class
In-Reply-To: <1186503932.110835.293640@x40g2000prg.googlegroups.com>
References: <1186503932.110835.293640@x40g2000prg.googlegroups.com>
Message-ID: <kd2dnd75bORePyXbnZ2dnUVZ_jSdnZ2d@comcast.com>

Bob B. wrote:
> I've been playing with descriptors lately.  I'm having one problem I
> can't seem to find the answer to.  I want to assign a descriptor to a
> list of attributes.  I know I should be able to add these somewhere in
> the class's __dict__, but I can't figure out where.  Here's some code:
> 
> class MyDesc(object):
>   def __init__(self, name=None, initVal=None):
>     self.name = name
>     self.value = initVal
> 
>   def __get__(self, obj, objtype):
>     // Do some stuff
>     self.value = "blah"
>     return self.value
> 
> class MyClass(object):
>   attributes = ('attr1', 'attr2')
>   for attr in attributes:
>     exec ("%s=MyDesc('%s')") % (attr, attr)
> 
>   // More stuff in the class
> 
> Ok, that "exec" is an ugly hack.  There's gotta be someway to plop
> this straight into the class's __dict__ without doing that, but when I
> try adding self.__class__.__dict__[attr] = MyDesc(attr) in MyClass's
> __init__ method, I get the error: "TypeError: 'dictproxy' object does
> not support item assignment"

Probably the simplest thing is to just add the attributes after the 
class body, e.g.::

     >>> class MyClass(object):
     ...     pass
     ...
     >>> for attr in ['attr1', 'attr2']:
     ...     setattr(MyClass, attr, MyDesc(attr))
     ...
     >>> c = MyClass()
     >>> c.attr1
     'blah'

Another option would be to use a metaclass to set the class attributes 
at class creation time::

     >>> class Meta(type):
     ...     def __init__(cls, name, bases, bodydict):
     ...         for attr in cls._desc_attrs:
     ...             setattr(cls, attr, MyDesc(attr))
     ...
     >>> class MyClass(object):
     ...     __metaclass__ = Meta
     ...     _desc_attrs = ['attr1', 'attr2']
     ...
     >>> c = MyClass()
     >>> c.attr1
     'blah'


HTH,

STeVe


From exarkun at divmod.com  Thu Aug  9 07:48:32 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 9 Aug 2007 07:48:32 -0400
Subject: Stackless Integration
In-Reply-To: <1186650027.043779.276520@i38g2000prf.googlegroups.com>
Message-ID: <20070809114832.4947.1833247582.divmod.quotient.20482@ohm>

On Thu, 09 Aug 2007 09:00:27 -0000, "Justin T." <jmtulloss at gmail.com> wrote:
>Hi,
>
>I've been looking at stackless python a little bit, and it's awesome.
>My question is, why hasn't it been integrated into the upstream python
>tree? Does it cause problems with the current C-extensions? It seems
>like if something is fully compatible and better, then it would be
>adopted. However, it hasn't been in what appears to be 7 years of
>existence, so I assume there's a reason.

It's not Pythonic.

Jean-Paul


From willmaier at ml1.net  Thu Aug 23 13:34:12 2007
From: willmaier at ml1.net (Will Maier)
Date: Thu, 23 Aug 2007 12:34:12 -0500
Subject: My 'time' module is broken, unsure of cause
In-Reply-To: <200708231122.55588.bulliver@badcomputer.org>
References: <200708231122.55588.bulliver@badcomputer.org>
Message-ID: <20070823173412.GP19274@lass.lfod.us>

On Thu, Aug 23, 2007 at 11:22:55AM -0600, darren kirby wrote:
> Python 2.4.4 (#1, Aug 23 2007, 10:51:29)
> [GCC 4.1.2 (Gentoo 4.1.2)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import time
> 40:42:0
> >>> now = time.time()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: 'module' object has no attribute 'time'

Uh...that's obviously not right (as you noticed). You probably have
a different module that's shadowing the stdlib's time. To check:

    Python 2.4.4 (#1, Jul 26 2007, 14:42:10)
    [GCC 3.3.5 (propolice)] on openbsd4
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import time
    >>> print time.__file__
    /usr/local/lib/python2.4/lib-dynload/time.so

-- 

[Will Maier]-----------------[willmaier at ml1.net|http://www.lfod.us/]


From duncan.booth at invalid.invalid  Sat Aug 11 12:06:18 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 11 Aug 2007 16:06:18 GMT
Subject: Metaclass v.s. Property function.
References: <1186835613.178733.81210@q75g2000hsh.googlegroups.com>
Message-ID: <Xns998998BD9112Fduncanbooth@127.0.0.1>

Jens Thiede <jensthiede at gmail.com> wrote:

> I don't like the property function, usable in the new-style classes,
> because having to remember to manage a list of "foo = property(...)"
> assignments just plain sucks, so I wrote a metaclass that does things
> a little differently. Please have a look and tell me whether this is
> useful or impractical. The metaclass is here:
> http://pastebin.com/m5b06b571 and some simple testcode is here:
> http://pastebin.com/m382f2ae9. Notice the first line though.
> 
Here's something I posted a while back which lets you use property as a 
decorator:

         class C(object):
            def __init__(self, colour):
                self._colour = colour

            @property.set
            def colour(self, value):
                self._colour = value

            @property.get
            def colour(self):
                return self._colour

            @property.delete
            def colour(self):
                self._colour = 'none' 

See:
http://groups.google.co.uk/group/comp.lang.python/browse_thread/thread/b442d08c9a019a8/8a381be5edc26340

Whether you like that style is of course a matter of personal opinion.


From __peter__ at web.de  Fri Aug 17 14:34:14 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 17 Aug 2007 20:34:14 +0200
Subject: question
References: <1187373737.410546.70930@w3g2000hsg.googlegroups.com>
Message-ID: <fa4pn7$5sh$03$1@news.t-online.com>

 CarpeSkium at gmail.com wrote:

> "I've parsed a webpage into a text file. In doing so, I've kept all
> the text I'm interested in, and removed all the text I don't want. My
> result is a text file that is comma-separated. However, the text file
> is one, very long, single string. I need to substitute every eighth
> (8th) comma with a new line ("\n"). I've tried regular expressions,
> but don't know how to make this happen on only every eighth comma. I'd
> post my code, but none of it works. Thanks for the help."

>>> text = "aaa," * 20
>>> from itertools import cycle, groupby
>>> print "\n".join(",".join(g) for k, g in groupby(text.split(","),
...     key=lambda key, c=cycle([True]*8+[False]*8): c.next()))
aaa,aaa,aaa,aaa,aaa,aaa,aaa,aaa
aaa,aaa,aaa,aaa,aaa,aaa,aaa,aaa
aaa,aaa,aaa,aaa,

:-)

Peter


From david at asdf.asdf  Sun Aug 26 23:41:17 2007
From: david at asdf.asdf (bambam)
Date: Mon, 27 Aug 2007 13:41:17 +1000
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com><1187898049.734696.9500@l22g2000prc.googlegroups.com><13csi2tn49esmc3@corp.supernews.com>	<mailman.230.1187928865.32294.python-list@python.org>	<13csqk47j0c56b0@corp.supernews.com>	<CqSdnRl2x8928FPbnZ2dnUVZ_jSdnZ2d@speakeasy.net><13ct7v3qn2v5206@corp.supernews.com>
	<mailman.238.1187948359.32294.python-list@python.org>
	<13d49lk6ue2as6d@corp.supernews.com>
Message-ID: <13d4hutad1dq699@corp.supernews.com>

Is it safe to write

A = [x for x in A if x in U]

or is that undefined? I understand that the slice operation
can be used to make a temporary copy, so I could write

A=[x for x in A[:] if x in U]

but I've just copied that without any understanding.

Steve.


"bambam" <david at asdf.asdf> wrote in message 
news:13d49lk6ue2as6d at corp.supernews.com...
> That looks good, and perhaps a difference operator
> would be too simple to be useful anyway.
>
> Steve.
>
> "Mikael Olofsson" <mikael at isy.liu.se> wrote in message 
> news:mailman.238.1187948359.32294.python-list at python.org...
>>
>>
>> bambam wrote:
>>>
>>> In this case it doesn't matter - my lists don't contain
>>> duplicate elements this time - but I have worked with lists in
>>> money market and in inventory, and finding the intersection
>>> and difference for matching off and netting out are standard
>>> operations.
>>
>> I would use a list comprehension for that case:
>>
>> A = ['a','b','c','a','c','d']
>> U = ['a','b','e']
>> B = [x for x in A if x in U]
>>
>> The result would be B==['a','b','a']
>>
>> /MiO
>
> 




From erik at myemma.com  Thu Aug 23 13:44:21 2007
From: erik at myemma.com (Erik Jones)
Date: Thu, 23 Aug 2007 12:44:21 -0500
Subject: comparing two lists
In-Reply-To: <46CDB57C.9080701@iptel.org>
References: <46CDB57C.9080701@iptel.org>
Message-ID: <E525B7F6-925D-45FA-80BB-F7834A368FA6@myemma.com>

On Aug 23, 2007, at 11:27 AM, Ladislav Andel wrote:

> Hi,
> what would be the most efficient way to do following?
>
> I have a list of dictionaries  taken from DB e.g.
> dblist = [{'id:1, 'host':'google.com','ip_address':'1.2.3.4'},
> {'id:3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
> {'id:9, 'host':'msn.com','ip_address':'11.3.2.3'}]
>
> and list of object instances in memory(it's just for example)
> which are looping within itself and testing particular hosts
>
> memlist = [<instance 1>,<instance 2>]
> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
> memlist[1].id  is 9 and  memlist[1].host is msn.com etc.
>
> Now I want to add a new instance to memlist since id=3(in dblist)  
> is not
> in memlist.
> How would you iterate through it and insert a new instance?
>
> The result should be:
> memlist = [<instance 1>,<instance 2>, <instance 3>]
> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
> memlist[1].id  is 3 and  memlist[1].host is yahoo.com etc.
> memlist[2].id  is 9 and  memlist[2].host is msn.com etc.

Well, if you add a constructor for object instances that can take  
those dictionaries you could do something like:

for row in dblist.iteritems():
	obj = Obj(row)   # where Obj is your classname
	if obj is not in memlist:
		memlist.append(obj)
>
> Furthermore, I can have the opposite situation.
> This time I need to remove from memlist a host which is not in dblist.
> How would you do this?

Similarly, if you add an toHash() method to you object class you  
could do something like (using the reverse iteration solution  
mentioned in another reply):

for i in range(len(memlist) -1, -1, -1):
	if memlist[[i].toHash() not in dblist:
		del memlist[i]

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From aboudouvas at panafonet.gr  Fri Aug 10 06:21:29 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Fri, 10 Aug 2007 03:21:29 -0700
Subject: Question about properties.
Message-ID: <1186741289.074717.174370@e16g2000pri.googlegroups.com>

Hi,

i read in a book the following code snippet that is dealing with
properties:

class ProtectAndHideX(object):
    def __init__(self, x):
        assert isinstance(x, int), '"x" must be an integer!"'
        self.__x = ~x

    def get_x(self):
        return ~self.__x

    x = property(get_x)


Can anyone please help me understand what the symbol "~" does here ??

Thanks for any help!



From lew at lewscanon.com  Mon Aug 20 17:51:51 2007
From: lew at lewscanon.com (Lew)
Date: Mon, 20 Aug 2007 17:51:51 -0400
Subject: Latest models of Gibson guitars
In-Reply-To: <1187623025.845370.251530@x40g2000prg.googlegroups.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<QsCdnfC5hI4ENFXbnZ2dnUVZ8v2vnZ2d@bt.com>
	<190820071924351381%rag@nospam.techline.com>
	<1187623025.845370.251530@x40g2000prg.googlegroups.com>
Message-ID: <f5idnbNj5-BqkVfbnZ2dnUVZ_tfinZ2d@comcast.com>

RickH wrote:
> On Aug 19, 9:24 pm, Randall Ainsworth <r... at nospam.techline.com>
> wrote:
>> In article <QsCdnfC5hI4ENFXbnZ2dnUVZ8v2vn... at bt.com>, Hermit
>>
>> <her... at please.dont.bother.com> wrote:
>>> How does the image quality compare with a DSLR?
>> Depends on whether it's a Paul or a Strat.
> 
> A Strat is a Fender, but I'd rather win a Gibson es175.

Please do not include comp.lang.java.programmer in this discussion, as it is 
waaaay off topic.

-- 
Lew


From pavlovevidence at gmail.com  Mon Aug 20 01:55:17 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Mon, 20 Aug 2007 05:55:17 -0000
Subject: Python question (PyNoob)
In-Reply-To: <3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d@bt.com>
References: <3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d@bt.com>
Message-ID: <1187589317.743813.241930@l22g2000prc.googlegroups.com>

On Aug 19, 8:33 pm, Anonymous <no.re... at here.com> wrote:
> I have exp with C/C++ (and a few other langs). I want to use Python to
> start doing the ff:
>
> 1). Data Munging (text processing) - instead of Perl
> 2). Automating my build process
> 3). (Possibly) some web data retrieval jobs
>
> Can anyone point me to resurces/possibly scripts that can get me up to
> speed (to do these 3 things) ASAP, without having to learn the basics of
> programming?

You want the Python Library Reference (quod googla).

If you know the basics of programming already, any old Python tutorial
will do, so just skim through the official one (q.g.) to pick up the
syntax and semantic rules.  Then refer to the Library Reference, which
is well organized and make it easy to track down what you need.  The
libraries come with very good built-in support for tasks 1 and 3; for
2 Python supports timestamp checking and subprocess calling and
whatnot, but stuff like dependency trees you'll have to work out
yourself.

(BTW, if "make" is failing or annoying you, you might want to consider
SCons, which for me has been a lot more intelligent and
straightforward than make ever was.)


Carl Banks



From jantod at gmail.com  Tue Aug 14 06:16:24 2007
From: jantod at gmail.com (Janto Dreijer)
Date: Tue, 14 Aug 2007 10:16:24 -0000
Subject: Fast kNN from python
Message-ID: <1187086584.076990.260680@r34g2000hsd.googlegroups.com>

Hi!

I am looking for a Python implementation or bindings to a library that
can quickly find k-Nearest Neighbors given an arbitrary distance
metric between objects. Specifically, I have an "edit distance"
between objects that is written in Python.

I haven't looked at the methods in detail but I think I'm looking for
one of the data structures listed on http://en.wikipedia.org/wiki/Metric_trees
(i.e. vp-trees, cover trees, m-trees or bk trees). But I might be
wrong. An approximate kNN would also work.

If there doesn't exist such an implementation yet, any advice on a
library I can wrap myself would also be appreciated.

Thanks!
Janto

PS Before anyone suggests it, I can't use the library at
http://www.cs.umd.edu/~mount/ANN/ as it assumes Minkowski distance
functions.



From steve at holdenweb.com  Thu Aug 16 23:23:13 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Aug 2007 23:23:13 -0400
Subject: why psyco using more memery in liunx?
In-Reply-To: <005d01c7e078$c13d0ed0$811ba8c0@kyom>
References: <005d01c7e078$c13d0ed0$811ba8c0@kyom>
Message-ID: <46C514A1.9060503@holdenweb.com>

kyo guan wrote:
> Hi all:
> 
> 	When you import psyco in python2.5, you can see the memery grow up near 40MB in linux. but the same version python and
> psyco, is only grow up 1MB under windows. 
> 
Please don't repeat the question again. It *has* reached the list. 
Patience is a virtue ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From dogatemycomputer at gmail.com  Wed Aug 22 16:27:17 2007
From: dogatemycomputer at gmail.com (dogatemycomputer at gmail.com)
Date: Wed, 22 Aug 2007 20:27:17 -0000
Subject: Learning Python using a book based on version 1.5
Message-ID: <1187814437.775758.159510@e9g2000prf.googlegroups.com>


Greetings,

A friend of mine dropped off a copy of Sams Teach Yourself Python in
24 Hours published in 2000.  I skimmed the first couple of chapters
looking for the interpreter version and the book was based on version
Python version 1.5.

Is this book still relevant?   Should I toss it and look for something
newer?

Any thoughts would be appreciated.

Best Regards,
Dave



From mccredie at gmail.com  Mon Aug 27 12:52:50 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Mon, 27 Aug 2007 09:52:50 -0700
Subject: the del function
In-Reply-To: <eb79828c0708261229t2a91c252jbb209b4db040843c@mail.gmail.com>
References: <eb79828c0708261229t2a91c252jbb209b4db040843c@mail.gmail.com>
Message-ID: <9e95df10708270952p188b8702r3b778d6a1e60c30c@mail.gmail.com>

> For some odd reason the del array[ray] isn't actually deleting the array
> item in the list I get the following output:
>
> C:\Documents and
> Settings\program\Desktop\python\pygame>remix.py
> [2, 2, 2, 4, 4, 4, 4, 3, 3, 3, 3]
> [2, 2, 2, 4, 4, 4, 4, 3, 3, 3, 3]
> [2, 2, 2, 2, 4, 4, 4, 3, 3, 3, 3]
> [2, 2, 2, 2, 4, 4, 4, 3, 3, 3, 3]
> [2, 2, 4, 4]
>
> The _red function is fine, but the del function isn't working.  What did I
> do wrong?

The code is doing what you told it to:

[code]
while x < 4:
    array = single_players[4:17] # <-- you are re-creating `array' in every loop
    length = len(array) - 1
    ray = random.randint(0,length)
    _red[x] = array[ray]
    del array[ray]
    print array
    x = x + 1
print _red
[/code]

My guess is that you want this:

[code]
array = single_players[4:17]
while x < 4:
    length = len(array) - 1
    ray = random.randint(0,length)
    _red[x] = array[ray]
    del array[ray]
    print array
    x = x + 1
print _red
[/code]

I'm sure you could do something with random.shuffle or random.choice
though that would be much cleaner. It isn't entirely clear what you
are trying to do though, so I'm stopping short of posting any code.

Matt


From BjornSteinarFjeldPettersen at gmail.com  Sun Aug 19 21:47:05 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Mon, 20 Aug 2007 01:47:05 -0000
Subject: Sorting a list of Unicode strings?
In-Reply-To: <1i338vd.1kisqttkij0d9N%aleax@mac.com>
References: <1187542237.139346.6910@o80g2000hse.googlegroups.com>
	<46C87772.2010603@web.de>
	<1187543116.941243.200960@r34g2000hsd.googlegroups.com>
	<1i338vd.1kisqttkij0d9N%aleax@mac.com>
Message-ID: <1187574425.046278.140930@o80g2000hse.googlegroups.com>

On Aug 19, 8:09 pm, al... at mac.com (Alex Martelli) wrote:
[...]
> In both Swedish and Danish, I believe, A-with-ring sorts AFTER the
> letter Z in the alphabet; so, having ?aland (where I'm using Aa for
> A-with-ring, since this newsreader has some problem in letting me enter
> non-ascii characters;-) sort "right at the bottom", while it "doesn't
> look right" to YOU (maybe an English-speaker?) may look right to the
> inhabitants of that locality (be they Danes or Swedes -- but I believe
> Norwegian may also work similarly in terms of sorting).

You're absolutely correct, the Norwegian and Danish alphabets end
with ..xyz???, while the Swedish alphabet ends with ..xyz??? and sort
order follows placement. Indeed, my first reaction to the op was:
where else would ?land be but at the end? One, perhaps interesting,
tidbit, is that ?land "belongs" to Finland (it's an autonomous,
demilitarized, monolingually Swedish-speaking administrative province
of Finland). The Finnish alphabet is identical to the Swedish
alphabet, including sort order (at least in this case)

For the ascii-speakers out there, the key point to remember is that
the letter ? (pronounced like the au in brittish autumn) is not an
ascii A with a ring on top. The ring-on-top is an intrinsic part of
the letter, in the same way the tail on the letter Q isn't a
decoration of the letter O.

-- bjorn



From http  Mon Aug  6 18:25:51 2007
From: http (Paul Rubin)
Date: 06 Aug 2007 15:25:51 -0700
Subject: Tkinter or wxpython?
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
	<mailman.1680.1186416061.22759.python-list@python.org>
	<7x3aywr4tc.fsf@ruckus.brouhaha.com>
	<mailman.1684.1186422197.22759.python-list@python.org>
	<7x8x8oqy17.fsf@ruckus.brouhaha.com>
	<mailman.1694.1186433048.22759.python-list@python.org>
Message-ID: <7xy7gopafk.fsf@ruckus.brouhaha.com>

"Chris Mellon" <arkanes at gmail.com> writes:
> You repeatedly have used the word "slickness" as a pejorative. I find
> that offensive and it's insulting to users. When I write applications,
> I want the interface to be as smooth and trouble free as possible,

It's a perjorative when it's done for its own sake and doesn't really
help the user.  This happens a lot.  When it helps the user, as it
sometimes does, then it's not perjorative.

> As a matter of time spent in development, I do not find that
> non-trivial UIs are significantly easier to develop using web
> interfaces.

That's possibly true, but a lot of the time, trivial interfaces are
enough.  Look at Google search, one of the most complex apps ever
built (tens or hundreds of MLOC, massive distributed crawler
infrastructure, 100's of PhD's figuring out the algorithms, etc.) but
its interface is simple HTML that you would probably call trivial.  It
is quite possibly the most popular application in the world.

> As a matter of respect for the user, I'm not going to tell them to use
> a trivial UI if a non-trivial one will save them time, learning
> effort, or frustration. In order to make this decision, I like to work
> with the people actually using it and watch them at work. To see what
> kind of extra steps they have to take and where I can save them time
> or inaccuracy or frustration.

Right.  Obviously this has to be decided according to the specific
needs of the application.  A lot of times, trivial interfaces are
easier to learn than nontrivial ones, precisely because they are
trivial so there is less to learn.  Again look at Google search for an
example.

Also, at least for in-house applications, while the user's time counts
(since their time costs your customer money), your development time
and deployment effort also costs money that comes from exactly the
same place, so you have to take into consideration the number of
users, amount of time they will spend using the program, just how much
of that time (if any) a fancier interface will save, etc.


From esj at harvee.org  Wed Aug 29 22:09:54 2007
From: esj at harvee.org (Eric S. Johansson)
Date: Wed, 29 Aug 2007 22:09:54 -0400
Subject: IDE for Python
In-Reply-To: <87tzqhewsq.fsf@benfinney.id.au>
References: <46CAB7D4.5070308@gmail.com>	<mailman.277.1187982888.32294.python-list@python.org>	<mailman.115.1188417806.28954.python-list@python.org>
	<87tzqhewsq.fsf@benfinney.id.au>
Message-ID: <46D626F2.80803@harvee.org>

Ben Finney wrote:
> Stefan Behnel <stefan.behnel-n05pAM at web.de> writes:

> "Neither"? Emacs is both editor *and* IDE.

I think of it more as feature full but somehow unsatisfying.  For example, for 
those of us PRDs ( Politely Referred to as Disabled) who are trying to program 
by voice could use an enumeration of all symbols visible from a cursor on 
outward through method, class, and file scope, etc.  then we can take we can 
speak symbols and make them pronounceable as well as synthesize a grammar so 
that one can refer to symbols in the object hierarchy by absolute paths as well 
as individual symbols.

it's just an idea at this stage but it could be fun to see how well it would 
work in real life



From pyscottishguy at hotmail.com  Wed Aug  8 12:00:12 2007
From: pyscottishguy at hotmail.com (pyscottishguy at hotmail.com)
Date: Wed, 08 Aug 2007 16:00:12 -0000
Subject: 'Advanced' list comprehension? query
Message-ID: <1186588812.006107.185570@o61g2000hsh.googlegroups.com>

Hi,

I'm playing around with list comprehension, and I'm trying to find the
most aesthetic way to do the following:

I have two lists:

noShowList = ['one', 'two', 'three']

myList = ['item one', 'item four', 'three item']

I want to show all the items from 'myList' that do not contain any of
the strings in 'noShowList'.

i.e. 'item four'

I can do it like this:

def inItem(noShowList, listitem):
    return [x for x in noShowList if x in listitem]

print [x for x in myList if not inItem(noShowList, x)]

and I can do it (horribly) with:

print [x for x in myList if not (lambda y, z:[i for i in y if i in z])
(noShowList, x)]

I can also print out the items that DO contain the 'noShowList'
strings with:

print [x for x in myList for y in noShowList if y in x]

but I can't get the 'not' bit to work in the above line.

Any ideas?
Thanks!



From kyosohma at gmail.com  Tue Aug 14 08:57:11 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 14 Aug 2007 05:57:11 -0700
Subject: Opinions about this new Python book?
In-Reply-To: <mailman.1957.1187093157.22759.python-list@python.org>
References: <mailman.1957.1187093157.22759.python-list@python.org>
Message-ID: <1187096231.194685.86030@m37g2000prh.googlegroups.com>

On Aug 14, 7:05 am, Dick Moores <r... at rcblue.com> wrote:
> I'd appreciate opinions about this new Python book.
>
> Title: Python Power!: The Comprehensive Guide
> Author:  Matt Telles
> Publisher:  Course Technology
> Pub. Date:  Jul 27, 2007
> Edition:  1st edition
> Binding:  Paperback
> Pages:  508
> ISBN:  1598631586
> List Price:  34.99 USD
>
> The book on the publisher's website: <http://tinyurl.com/2dkhzg>
>
> And at BestBookDeal.com:
> <http://www.bestbookdeal.com/book/compare/1598631586>
>
> Thanks,
>
> Dick Moores

I just got this book over the weekend. I'll start reading/skimming
through it this week and hopefully remember to get back to you. By the
way, why do you want to know?

Mike



From aleax at mac.com  Mon Aug 13 11:28:23 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 13 Aug 2007 08:28:23 -0700
Subject: Help with optimisation
References: <46c06b51$0$11684$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <1i2rzhj.sv9wn758l2grN%aleax@mac.com>

special_dragonfly <Dominic at PLEASEASK.co.uk> wrote:
   ...
>     dom=xml.dom.minidom.parseString(text_buffer)

If you need to optimize code that parses XML, use ElementTree (some
other parsers are also fast, but minidom ISN'T).


Alex


From robin at reportlab.com  Tue Aug 28 13:03:33 2007
From: robin at reportlab.com (Robin Becker)
Date: Tue, 28 Aug 2007 18:03:33 +0100
Subject: sys.setdefaultencoding
Message-ID: <46D45565.8000701@chamonix.reportlab.co.uk>

Can someone explain the rationale of making the default encoding a sitewide setting?

I could live with the the default being set on a per process basis, but it 
baffles me why even that possibility is taken away as site.py removes 
sys.setdefaultencoding.

Is there a way to allow the process to specify that unicode-->str should use 
'utf8' rather than 'ascii' in all non-specific cases?
-- 
Robin Becker



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Aug 13 18:44:18 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 14 Aug 2007 00:44:18 +0200
Subject: wxPython - drawing without paint event
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
	<1186738813.373909.96230@x35g2000prf.googlegroups.com>
	<1186796567.331348.42450@q3g2000prf.googlegroups.com>
	<5i5l0dF2lortaU1@mid.individual.net>
	<1186883988.585048.16590@m37g2000prh.googlegroups.com>
	<5i8befF3o5no1U1@mid.individual.net>
	<1186928595.014008.61950@b79g2000hse.googlegroups.com>
	<5i98bsF3nmbavU1@mid.individual.net>
	<1186951326.218981.17820@b79g2000hse.googlegroups.com>
	<mailman.1885.1186953122.22759.python-list@python.org>
	<1186966731.768800.81620@x40g2000prg.googlegroups.com>
	<5ibsenF3nq29uU2@mid.individual.net>
	<1187037162.322154.319540@x40g2000prg.googlegroups.com>
Message-ID: <5ic562F3pi903U2@mid.individual.net>

 kyosohma at gmail.com wrote:

> I guess I haven't looked up any wxPython tutorials. I typically
> use a combination of the wxPython wiki, the demo and the WIA book
> for my work.

Me too (except the mailing list, occasionally), and it works quite
well.

Regards,


Bj?rn

-- 
BOFH excuse #306:

CPU-angle has to be adjusted because of vibrations coming from the
nearby road



From fshu at cisco.com  Wed Aug 15 12:32:55 2007
From: fshu at cisco.com (Fred Shu (fshu))
Date: Wed, 15 Aug 2007 09:32:55 -0700
Subject: how to convert a c program to java program
Message-ID: <DBA9F8C1020F5740BAD5A0E6CE809B18017267C2@xmb-sjc-223.amer.cisco.com>

I heard I need to port C program to JPython first and compile it to
native JAVA.  I don't know
anything about JPython.  Is there a tool to do the porting?  If not,
what is the quickest way to learn
JPython?
 
Thanks,
Fred
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From mccredie at gmail.com  Fri Aug 17 16:11:34 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Fri, 17 Aug 2007 13:11:34 -0700
Subject: how to convert a c program to java program
In-Reply-To: <9e95df10708171310s5df2e2cjbe4885bb2d5e401a@mail.gmail.com>
References: <DBA9F8C1020F5740BAD5A0E6CE809B18017267C2@xmb-sjc-223.amer.cisco.com>
	<9e95df10708171310s5df2e2cjbe4885bb2d5e401a@mail.gmail.com>
Message-ID: <9e95df10708171311p5f9ad99dn373e0ad69f716d6e@mail.gmail.com>

> I heard I need to port C program to JPython first and compile it to native
> JAVA.  I don't know
> anything about JPython.  Is there a tool to do the porting?  If not, what is
> the quickest way to learn
> JPython?

I'm assuming that you are refering to Jython. You probably want to
start by learning Python, since Jython is essentially just an
implementation of Python written in Java. I'm not sure why you need to
involve Jython at all though. Syntax wise there are many more
similarities between C and Java than there are between C and Python or
Python and Java. Anyway, if you want to learn Python try one of these:
http://python.org/doc/tut/ or http://www.diveintopython.org/.

Matt


From maventheextrawords at techie.com  Wed Aug  8 06:18:02 2007
From: maventheextrawords at techie.com (-Lost)
Date: Wed, 08 Aug 2007 05:18:02 -0500
Subject: Compiling PythonD using DJGPP
References: <46a38c61$0$16279$88260bb3@free.teranews.com>
Message-ID: <Xns998640789877lostthreads@216.196.97.136>

John Simeon's response:

> My problem is that I am getting a compiler error that I do not
> understand: 
> 
> gcc -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall -Wstrict-prototypes
> -I. -I./Include 
>   -DPy_BUILD_CORE -o Python/compile.o Python/compile.c
> Python/compile.c: In function 'optimize_code':
> Python/compile.c:512: warning: pointer targets in assignment differ in
> signedness
> Python/compile.c: At top level:
> Python/compile.c:1038: error: two or more data types in declaration 
> specifiers
> Python/compile.c:1232: error: two or more data types in declaration 
> specifiers
> Python/compile.c: In function 'com_addbyte':
> Python/compile.c:1232: error: parameter name omitted
> Python/compile.c:1241: error: expected expression before 'unsigned'
> make.exe: *** [Python/compile.o] Error 1
> 
> Does anyone have any ideas that could help shed some light on this and
> help me get back on track?

You realize this is not a Python question right?  Or rather, it is not an 
error specific to Python.  It is an error related to a specific compiler, 
and more specifically a non-standard implementation of Python.

You'd have much better luck following the advice of the author of PythonD 
and and taking this question to [ news:comp.os.msdos.djgpp ].

-- 
-Lost
Remove the extra words to reply by e-mail.  Don't e-mail me.  I am 
kidding.  No I am not.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Aug 11 07:31:25 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 11 Aug 2007 13:31:25 +0200
Subject: wxPython - drawing without paint event
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
	<1186738813.373909.96230@x35g2000prf.googlegroups.com>
	<1186796567.331348.42450@q3g2000prf.googlegroups.com>
Message-ID: <5i5l0dF2lortaU1@mid.individual.net>

 glenn.chappell at gmail.com wrote:

> On a related topic, it seems like it would be nice to do *all*
> drawing in
> response to paint events. When I get an event from the timer, I
> would just tell wx that part of the window needs redrawing, and
> depend on it to give me a paint even when nothing of higher
> priority needs to be done.
> I've seen this kind of logic recommended in other GUI tookits. Is
> it a good idea in wxPython, and, if so, how does one do it?

At least it is not required -- there are device contexts for use
inside and outside of paint events. 

One nice strategy from an example in "wxPython in Action" is the
following:

* the frame has Draw methods that draw into a BufferedDC, which is
chained to a bitmap member

* inside the paint method, the bitmap member is drawn to screen

Regards,


Bj?rn

-- 
BOFH excuse #393:

Interference from the Van Allen Belt.



From gagsl-py2 at yahoo.com.ar  Wed Aug 22 09:45:29 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 22 Aug 2007 06:45:29 -0700
Subject: Design philosophy of HTTPServer and BaseHTTPRequestHandler
In-Reply-To: <1187776216.269456.310230@q4g2000prc.googlegroups.com>
References: <1187776216.269456.310230@q4g2000prc.googlegroups.com>
Message-ID: <1187790329.575480.14070@i38g2000prf.googlegroups.com>

On 22 ago, 06:50, "tzuchien <dot> chiu <at> gmail <dot> com"
<tzuchien.c... at gmail.com> wrote:
> Hello, everyone.
>
> Several instances of a same script, which accepts parameters and does
> a lengthy job, are executed on a remote machine. I want to couple the
> script with a tiny HTTP server so that I can connect to the machine
> with a browser and monitor the progress of jobs. The HTTP server of
> each instance will bind to different ports.
>
> A BaseHTTPRequestHandler-derived class must somehow know the
> parameters of each instance/job in order to return instance/job-
> specific result back to the client in do_GET. However, there is no way
> to pass parameters (of the lengthy job) because the constructor of
> HTTPServer expects a BaseHTTPRequestHandler-derived "class", instead
> of an "object".
>
> I cannot (or should not) dynamically create a "BaseHTTPRequestHandler-
> derived "class" for each instance of the script, right?
>
> Do I misunderstand the design philosophy of HTTPServer and
> BaseHTTPRequestHandler, and they should not be used in this way?

The server is permanent; request handler instances are created and
destroyed as HTTP requests arrive and are processed.
You should store any permanent info in the server; your
"BaseHTTPRequestHandler-derived class" can reference the server using
its "server" attribute.

--
Gabriel Genellina



From wbrehaut at mcsnet.ca  Tue Aug 21 16:56:31 2007
From: wbrehaut at mcsnet.ca (Wayne Brehaut)
Date: Tue, 21 Aug 2007 14:56:31 -0600
Subject: How to optimise this code?
References: <mailman.68.1187711977.32294.python-list@python.org>
	<46CB3635.7050705@biotec.tu-dresden.de>
	<87mywk1x25.fsf@mulj.homelinux.net>
Message-ID: <1bkmc31iqs6udgl7of7f9q8bjq9fknfkgg@4ax.com>

On Tue, 21 Aug 2007 21:56:18 +0200, Hrvoje Niksic <hniksic at xemacs.org>
wrote:

>Christof Winter <winter at biotec.tu-dresden.de> writes:
>
>> To get rid of the if statements, replace __init__ function with:
>>
>>      def __init__(self, tc):
>>          functionToCall = eval("self.testCase%s" % tc)
>
>Or functionToCall = getattr(self, "testCase" + tc)
>
>eval can introduce unwanted side effects.

Hence the slogan "Do No Eval!"

wwwayne


From I_Dickinson at bitwise.co.uk  Mon Aug 20 09:00:24 2007
From: I_Dickinson at bitwise.co.uk (Ian Dickinson)
Date: Mon, 20 Aug 2007 14:00:24 +0100
Subject: Handwriting Recognition
Message-ID: <46C99E77.F136.00C8.0@bitwise.co.uk>

Hi

My name is Ian Dickinson and I am a professional software developer working in the UK and reasonably familiar with Python.

However a friend of mine who is a special educational needs teacher was asking me if I could write some handwriting recognition software for her, which would allow here pupils to write their input directly on a graphics tablet and then have this input converted to a text sting for further processing. The handwriting would be distinct letters either upper or lower case but not joined up writing.  I would like to help out here as I think this is a valuable  and worthwhile area of education so has anyone out there got any advice that could help me out.


Thanks in advance

Ian



From http  Mon Aug 27 15:27:26 2007
From: http (Paul Rubin)
Date: 27 Aug 2007 12:27:26 -0700
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csoronscqp7d2@corp.supernews.com>
	<1188090322.663217.102750@22g2000hsm.googlegroups.com>
	<13d4bucfm4m1lc4@corp.supernews.com>
	<mailman.13.1188182594.28954.python-list@python.org>
	<13d4gjm3qq0lt7c@corp.supernews.com>
	<slrnfd5kt4.b0.horpner@FIAD06.norwich.edu>
Message-ID: <7x1wdohj6p.fsf@ruckus.brouhaha.com>

Neil Cerutti <horpner at yahoo.com> writes:
> i = 0
> while i < self.parent.GetPageCount():
>   # do stuff
>   i += 1

Alternatively:

    from itertools import count

    for i in count():
       if i >= self.parent.GetPageCount():
          break
      ...


From no at spam.com  Thu Aug  2 15:37:11 2007
From: no at spam.com (Farshid Lashkari)
Date: Thu, 02 Aug 2007 12:37:11 -0700
Subject: Catching SystemExit in C API code when embedding Python?
In-Reply-To: <20070802212949.222081eb@cube.tz.axivion.com>
References: <20070802141906.2581c099@cube.tz.axivion.com>	<m%psi.3186$Mu5.909@newsfe15.phx>
	<20070802212949.222081eb@cube.tz.axivion.com>
Message-ID: <Bnqsi.3187$Mu5.389@newsfe15.phx>

Stefan Bellon wrote:
> Thanks for your hints ...
> 
> The interesting part is "Call python code". In my example this is done
> with PyRun_SimpleString which does not return if an exception is not
> handled but raised "out of" the interpreter. So I am unsure of what you
> mean with "Call python code".
> 
> When installing an excepthook (see my other posting), then I can indeed
> catch all exceptions ... except for SystemExit which is the one I'm
> after.
> 

You cannot use PyRun_SimpleString, since it will automatically print and 
clear the error. You will need to use PyRun_String instead.


From hd1956 at yahoo.com  Tue Aug 21 12:52:11 2007
From: hd1956 at yahoo.com (hd1956 at yahoo.com)
Date: Tue, 21 Aug 2007 16:52:11 -0000
Subject: Newbee Question
In-Reply-To: <1187685502.855643.122800@r34g2000hsd.googlegroups.com>
References: <mailman.15.1187620149.26576.python-list@python.org>
	<1187621470.484615.7010@i13g2000prf.googlegroups.com>
	<mailman.19.1187621934.26576.python-list@python.org>
	<1187622390.854759.162320@q3g2000prf.googlegroups.com>
	<1187650036.450645.185500@a39g2000hsc.googlegroups.com>
	<1187685502.855643.122800@r34g2000hsd.googlegroups.com>
Message-ID: <1187715131.514463.84960@57g2000hsv.googlegroups.com>

On Aug 21, 4:38 am, Ant <ant... at gmail.com> wrote:
> On Aug 20, 11:47 pm, hd1... at yahoo.com wrote:
> ...
>
> > Thanks for the help. By the way I am trying to learn the python after
> > work and on weekends. If it was a dumb question, to this group, I will
> > not bother you all again.
>
> It's not so much that it was a dumb question, but that it was asked in
> a dumb way :-) You'll get the most help in this group if you can show
> some evidence that you've had a go (the size of this thread ironically
> trounces that argument of course ;-) .)
>
> It's better to learn if people give you a critique of your own attempt
> at the code, rather than looking at other peoples efforts. There's a
> guide on how to ask good questions here:http://www.catb.org/~esr/faqs/smart-questions.html
>
> For what it's worth, here's a gratuitous version using generators, and
> one you should come back to once you've mastered the basics of Python:
>
> def counter(std_rate, over_rate, limit):
>     stops = 0
>     while True:
>         stops += 1
>         wage = stops * std_rate + max(0, stops - limit) * (over_rate -
> std_rate)
>         yield stops, wage
>
> truck = counter(0.4, 1.4, 22)
>
> for i in range(30):
>     print "Stopped %s times, with accumulated wage of $%s" %
> truck.next()
>
> --
> Ant...
>
> http://antroy.blogspot.com/
I tryed your code and got an error message #I use Wing IDE:
Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)]
Type "help", "copyright", "credits" or "license" for more information.
>>>
Evaluating lines 1-16 from truckStops.py
<string>:7: Warning: 'yield' will become a reserved keyword in the
future
Could not execute because an error occurred:
  invalid syntax: <string>, line 7, pos 19:
          yield stops, wage



From stefan.behnel-n05pAM at web.de  Wed Aug 29 12:51:59 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 29 Aug 2007 18:51:59 +0200
Subject: general function for sorting a matrix
In-Reply-To: <1188402447.290663.307640@z24g2000prh.googlegroups.com>
References: <1188402447.290663.307640@z24g2000prh.googlegroups.com>
Message-ID: <46D5A42F.3080900@web.de>

Xah Lee wrote:
[undermotivated blah stripped]

don't feed the troll.

Stefan


From DjGoldsmith at googlemail.com  Mon Aug 13 05:57:21 2007
From: DjGoldsmith at googlemail.com (DjGoldsmith at googlemail.com)
Date: Mon, 13 Aug 2007 09:57:21 -0000
Subject: Complexity of methods etc
In-Reply-To: <mailman.1892.1186963490.22759.python-list@python.org>
References: <mailman.1892.1186963490.22759.python-list@python.org>
Message-ID: <1186999041.283576.211210@22g2000hsm.googlegroups.com>

On Aug 13, 1:04 am, "Nathan Harmston" <ratchetg... at googlemail.com>
wrote:
> Hi,
>
> I was wondering if anyone knew of any resources, where I might be able
> to find information about the complexity of certain python functions
> or little tips on how to reduce complexity. I mean like the "".join(),
> kind of thing?
>
> I want to see if there are any improvements I can add to my coding in
> order to reduce  time/space usage/
>
> Many Thanks in advance
>
> Nathan

I found the two Python Speed articles useful for demonstrating new
ways to optimise code.  Each is full of little tricks and tips on
efficent ways of doing things.


http://wiki.python.org/moin/PythonSpeed
http://wiki.python.org/moin/PythonSpeed/PerformanceTips

Dan



From byte8bits at gmail.com  Tue Aug 21 15:58:52 2007
From: byte8bits at gmail.com (brad)
Date: Tue, 21 Aug 2007 15:58:52 -0400
Subject: Microsoft Vista and os.exec
In-Reply-To: <1187725385.938752.290390@r34g2000hsd.googlegroups.com>
References: <1187725385.938752.290390@r34g2000hsd.googlegroups.com>
Message-ID: <fafg8s$nck$1@solaris.cc.vt.edu>

franko353 wrote:
> I have wxPython programs that work fine in Win2000/XP using os.exec().
> 
> They do not work in MS Vista. Has anyone else had any luck with
> exec()?
> 
> I keep getting an 'invalid option' error.
> 
> It turn out it was really a security issue and I had to move to a
> "win32process.CreateProcess" solution to fix this under Vista.
> 
> There is a good example of using CreateProcess in the "Python
> programming on Win32" book.
> 

I've also had issues with Vista... mine have to do with the execution of 
scripts. I don't have a test vista box in front of me right now, all of 
my vmware vistas have deactivated me into 'reduced functionality mode'. 
  Basically, on XP, when I execute a script it runs in the directory 
that it executed in, but in Vista, it executes elsewhere... I don't 
remember where exactly right off the top of my head. Other than that 
issue it seems to work fine even with wxPython.


From fdu.xiaojf at gmail.com  Thu Aug  2 02:51:52 2007
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Thu, 02 Aug 2007 14:51:52 +0800
Subject: a dict trick
In-Reply-To: <1186036331.304916.304020@e9g2000prf.googlegroups.com>
References: <1186036331.304916.304020@e9g2000prf.googlegroups.com>
Message-ID: <46B17F08.8030209@gmail.com>

james_027 wrote:
> hi
> 
> for example I have this dictionary
> 
> dict = {'name':'james', 'language':'english'}
> 
> value = 'sex' in dict and dict['sex'] or 'unknown'
> 
> is a right pythonic of doing this one? I am trying to get a value from
> the dict, but if the key doesn't exist I will provide one.
> 
> THanks
> james
> 

value = your_dict.get(key, default_value)


From uymqlp502 at sneakemail.com  Fri Aug 31 21:32:55 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Fri, 31 Aug 2007 18:32:55 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <mailman.242.1188605128.28954.python-list@python.org>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<slrnfdg413.1e8.horpner@FIAD06.norwich.edu>
	<mailman.242.1188605128.28954.python-list@python.org>
Message-ID: <1188610375.710983.4780@m37g2000prh.googlegroups.com>


Ricardo Ar?oz wrote:

> Actually my point was that if a program is to be trusted in a critical
> situation (critical as in catastrophe if it goes wrong) then the OS, the
>  compiler/interpreter etc should abide by the same rules. That is
> obviously not possible, so there's not much case in making the time
> investment necessary for correctness proof of a little program (or
> usually a little function inside a program) when the possibilities for
> failure are all around it and even in the code that will run that
> function. And we should resort to other more sensible answers to the
> safety problem.

I don't quite see it that way.

I would agree that if your OS and compiler are unreliable, then it
doesn't make much sense to bend over backwards worrying about the
reliability of your
application. But for real safety-critical applications, you have no
excuse for not using a
highly reliable OS and compiler. For really critical stuff, I think
the real-time OSs are usually
stripped down to
the bare basics. And if you are using something like SPARK Ada, the
language itself is
stripped of many of the fancier features in Ada itself. (There's also
something called the
Ada Ravenscar profile, which I believe is geared for safety-critical
use but is not quite as
restrictive as SPARK.)

Keep in mind that the OS and compiler are typically also
used for many other applications, so they tend to get tested fairly
thoroughly. And remember
also that you won't have extraneous applications running -- like a web
browser
or a video game, so the OS will probably not be heavily stressed. The
most likely source
of failure is likely to be your application, so bending over backwards
to get it right makes
sense.

Then again, if you are running C on Windows, you might as well just
give up on reliability
from the start. You don't have a prayer.



From steve at holdenweb.com  Thu Aug 23 17:24:52 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 23 Aug 2007 17:24:52 -0400
Subject: creating a tar file with python
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
Message-ID: <faktv8$8fs$1@sea.gmane.org>

Brian McCann wrote:
> Hi,
>  
> I'm trying to create a tar file of the contents of the current directory
>  
> right now there is only one file "text.xml" in the current dir,  I'm 
> using"." current dir as source
> but that gives syntax error
> 
> any help would be greatly appreciated
> --Brian
>  
>  
> #!/usr/bin/python
> import string
> import os
> import sys
> import time
> import errno
> import shutil
> import tarfile
>  
> 
> tar = tarfile.open(.,"test.tar.gz", "w:gz)
> <mailto:brian.mccann at viziant.net>
>  
> 
well, /probably/ (meaning I haven't done any testing) you need quotes 
around the name of the current directory just like you do around the 
name of the file. Try

   tar = tarfile(".", "test.tar.gz", "w:gz")

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From danmcleran at yahoo.com  Wed Aug  1 12:09:00 2007
From: danmcleran at yahoo.com (danmcleran at yahoo.com)
Date: Wed, 01 Aug 2007 09:09:00 -0700
Subject: Assertion in list comprehension
In-Reply-To: <1185982643.001546.138180@e16g2000pri.googlegroups.com>
References: <1185982643.001546.138180@e16g2000pri.googlegroups.com>
Message-ID: <1185984540.245193.270110@i13g2000prf.googlegroups.com>

On Aug 1, 9:37 am, beginner <zyzhu2... at gmail.com> wrote:
> Hi,
>
> Does anyone know how to put an assertion in list comprehension? I have
> the following list comprehension, but I want to use an assertion to
> check the contents of rec_stdl. I ended up using another loop which
> essentially duplicates the functions of list comprehension. It just
> look like a waste of coding and computer time to me.
>
> I just wish I could put the assertions into list comprehensions.
>
>         x=[(rec_stdl[0].st/10000.0,
>             rec_stdl[0].cl,
>             rec_stdl[0].bb,
>             rec_stdl[0].bo,
>             rec_stdl[1].bb,
>             rec_stdl[1].bo,
>             rec_stdl[0].ex
>            )
>            for rec_stdl in rec_by_ex if len(rec_stdl)==2
>         ]
>
>         #duplicated loop
>         if __debug__:
>             for rec_stdl in rec_by_ex:
>                 l=len(rec_stdl)
>                 assert(l<=2 and l>0)
>                 if l==2:
>                     assert(rec_stdl[0].c=="C" and rec_stdl[1].c=="P")
>                     assert(rec_stdl[0].ex==rec_stdl[1].ex)
>                     assert(rec_stdl[0].st==rec_stdl[1].st)
>                     assert(rec_stdl[0].cp==rec_stdl[1].cp)
>
> Thanks,
> Geoffrey

Can't you just call a function from within your list comprehension and
do whatever you want for each item? Something like this (not tested):

def checker(item):
    assert(len(item) <= 2 and len(item) > 0)
    if len(item) == 2:
        assert(item[0].c == "C" and item[1].c == "P"

    return len(item) == 2

x = [whatever for item in all_items if checker(item = item)]



From __peter__ at web.de  Tue Aug 21 16:53:04 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 21 Aug 2007 22:53:04 +0200
Subject: Adjusting the names of custom exceptions (since raising strings
	is deprecated)
References: <1187672085.263963.157470@z24g2000prh.googlegroups.com>
	<5qxyi.18719$eY.12647@newssvr13.news.prodigy.net>
	<1187723880.146487.36250@l22g2000prc.googlegroups.com>
Message-ID: <fafjbi$4kl$00$1@news.t-online.com>

Silfheed wrote:

> On Aug 21, 1:32 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
>> Silfheed wrote:
>> > Heyas
>>
>> > So this probably highlights my lack of understanding of how naming
>> > works in python, but I'm currently using FailUnlessRaises in a unit
>> > test and raising exceptions with a string exception.  It's working
>> > pretty well, except that I get the deprecation warning that raising a
>> > string exception is going to go away.  So my question is, how do I
>> > mangle the name of my exception class enough that it doesnt stick the
>> > name of the module before the name of the exception?
>>
>> > Namely I'd like to get the following
>>
>> > ***
>> > Traceback (most recent call last):
>> >   File "<stdin>", line 1, in ?
>> > MyError: 'oops!'
>>
>> > instead of
>>
>> > ***
>> > Traceback (most recent call last):
>> >   File "<stdin>", line 1, in ?
>> > __main__.MyError: 'oops!'
>>
>> > (or even test_thingie.MyError as is usually the case).
>>
>> > Creating a class in a separate file and then doing
>>
>> > ***
>> > from module import MyError
>> > raise MyError
>>
>> > still gives
>>
>> > ***
>> > Traceback (most recent call last):
>> >   File "<stdin>", line 1, in <module>
>> > module.MyError
>>
>> > Anyway, any help appreciated.
>>
>> Would it be cheating to use metaclasses?
>>
>> # myModule.py
>> class ExampleType(type):
>>    def __repr__(cls):
>>      return cls.__name__
>>
>> class ExampleError(Exception):
>>    __metaclass__ = ExampleType
>>    __name__ = 'ExampleError'
>>    def __repr__(self):
>>      return 'ExampleError'
>>
>> py> import myModule
>> py> raise myMo
>> myModule      myModule.py   myModule.pyc  myModule.py~
>> py> raise myModule.Ex
>> myModule.ExampleError  myModule.ExampleType
>> py> raise myModule.ExampleError
>> ------------------------------------------------------------
>> Traceback (most recent call last):
>>    File "<ipython console>", line 1, in <module>
>> ExampleError
>>
>> James
> 
> It doesnt appear to work for me.
> Same exact code as you have but I still get:
> 
>>>> raise myModule.ExampleError
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> myModule.ExampleError

James tested his code in the ipython console which obviously uses a
different routine to produce the traceback. 

Try

>>> class MyError(Exception):
...     __module__ = None
...
>>> raise MyError("oops")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
MyError: oops

Peter


From aleax at mac.com  Fri Aug  3 11:38:00 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 3 Aug 2007 08:38:00 -0700
Subject: Efficient Rank Ordering of Nested Lists
References: <1186104049.022836.253470@e9g2000prf.googlegroups.com>
Message-ID: <1i29gpw.1vh7eku1iauistN%aleax@mac.com>

pablo.mitchell at gmail.com <pablo.mitchell at gmail.com> wrote:

> A naive approach to rank ordering (handling ties as well) of nested
> lists may be accomplished via:
> 
>    def rankLists(nestedList):
>       def rankList(singleList):
>           sortedList = list(singleList)
>           sortedList.sort()
>           return map(sortedList.index, singleList)
>       return map(rankList, nestedList)
> 
>    >>> unranked = [ [ 1, 2, 3, 4, 5 ], [ 3, 1, 5, 2, 4 ], [ -1.1, 2.2,
> 0, -1.1, 13 ] ]
>    >>> print rankLists(unranked)
> 
>    [[0, 1, 2, 3, 4], [2, 0, 4, 1, 3], [0, 3, 2, 0, 4]]
> 
> This works nicely when the dimensions of the nested list are small.
> It is slow when they are big.  Can someone suggest a clever way to
> speed it up?

Each use of sortedList.index is O(N) [where N is len(singleList)], and
you have N such uses in the map in the inner function, so this approach
is O(N squared).  Neil's suggestion to use bisect replaces the O(N)
.index with an O(log N) search, so the overall performance is O(N log N)
[[and you can't do better than that, big-O wise, because the sort step
is also O(N log N)]].

"beginner"'s advice to use a dictionary is also good and may turn out to
be faster, just because dicts are SO fast in Python -- but you need to
try and measure both alternatives.  One way to use a dict (warning,
untested code):

  def rankList(singleList):
      d = {}
      for i, item in reversed(enumerate(sorted(singleList))):
          d[item] = i
      return [d[item] for item in singleList]

If you find the for-clause too rich in functionality, you can of course
split it up a bit; but note that you do need the 'reversed' to deal with
the corner case of duplicate items (without it, you'd end up with 1s
instead of 0s for the third one of the sublists in your example).  If
speed is of the essence you might try to measure what happens if you
replace the returned expression with map(d.__getitem__, singleList), but
I suspect the list comprehension is faster as well as clearer.  

Another potential small speedup is to replace the first 3 statements
with just one:

d = dict((item,i) for i,item in reversed(enumerate(sorted(singleList))))

but THIS density of functionality is a bit above my personal threshold
of comfort ("sparse is better than dense":-).


Alex


From vedrandekovic at v-programs.com  Sun Aug 19 14:41:56 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Sun, 19 Aug 2007 11:41:56 -0700
Subject: Latest models of Gibson guitars
In-Reply-To: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
Message-ID: <1187548916.909340.37420@k79g2000hse.googlegroups.com>

On 19 kol, 19:34, mobile... at gmail.com wrote:
> Reviews of latest models of best guitars, fender, gibson, yamaha, and
> many more, with pictures and prices.
>
> http://pro-guitars.blogspot.com/
>
> And if you want to win a free guitar go here
>
> http://freeguitars.blogspot.com/

Hello,

This is  a newsgroup of programming language Python, stop with this!

Regards,
Vedran



From povkra at gmail.com  Wed Aug 22 18:47:28 2007
From: povkra at gmail.com (fritz)
Date: Wed, 22 Aug 2007 22:47:28 -0000
Subject: Car Air Conditioners!
Message-ID: <1187822848.038813.158390@l22g2000prc.googlegroups.com>

http://car-air-conditioning.blogspot.com/



From rcdailey at gmail.com  Fri Aug 17 14:16:32 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Fri, 17 Aug 2007 13:16:32 -0500
Subject: Problem with directory recursion!
Message-ID: <496954360708171116t4370c2ddra3d7905bc956c7eb@mail.gmail.com>

Hi,

I've created a function that is used to recurse a directory tree in Windows
XP using os.walk(). For the most part it works, however in some instances
the data is incorrect and I'm getting invalid sub-directory paths. Here's
the function:


def __doSearch( root_dir, sub_path, restype, ext ):
    print sub_path
    # Searches the specified directory and generates a
    # list of files to preload.
    complete_path = osp.normpath( osp.join( root_dir, sub_path ) )
    for root, dirs, files in os.walk( complete_path ):

        # Record the list of file hash ID's
        for file in files:
            split = __resType( file )
            if split[1] == restype:
#                print sub_path
                print "\t", file
                __appendResource( ext, sub_path, split[0] )

        # Remove .svn subdirectories; we don't walk these.
        if ".svn" in dirs:
            dirs.remove( ".svn" )

        # Recurse child directories
        for dir in dirs:
            __doSearch( root_dir, osp.join( sub_path, dir ), restype, ext )

Does anyone see anything immediately suspicious about the code? I'm assuming
that in Python, every time a function is called recursively it gets its own
copy of local variables. For some reason the sub_path variable isn't
consistent depending on where I use it. For example, if you notice the print
call at the very start of the function, it will output something like
"models/ships". However, after passing it into __appendResource(), it
appears to be just "models".
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From gagsl-py2 at yahoo.com.ar  Mon Aug 20 23:40:07 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Aug 2007 20:40:07 -0700
Subject: Pattern for error checking easiest-first?
In-Reply-To: <1187643719.772672.70780@w3g2000hsg.googlegroups.com>
References: <1187643719.772672.70780@w3g2000hsg.googlegroups.com>
Message-ID: <1187667607.283840.160690@k79g2000hse.googlegroups.com>

On 20 ago, 18:01, jquinn+goo... at cs.oberlin.edu wrote:

> The problem is that code like this does error checking backwards. A
> call to NetworkedThing.changeMe will first do a slow error check and
> then a fast one. Obviously there are various ways to get around this -
> either have the subclass explicitly ask the superclass to error check
> first, or vice totally versa. Is there some accepted pattern/idiom for
> handling this issue?

What about this:

class AbstractThing():
    def changeMe(self,blah):
         self.verify_blah(blah)
         self.blah = blah

    def verify_blah(self, blah):
         if blah < 1:
              raise MyException

class NetworkedThing(AbstractThing):
    def verify_blah(self, blah):
        AbstractThing.verify_blah(blah)
        if blah > self.getUpperLimitOverTheNetworkSlowly:
             raise MyOtherException

That is, it's the verify step that is overriden/enhanced, not the
changeMe method that stays the same.

--
Gabriel Genellina



From steve at holdenweb.com  Sun Aug 12 07:06:32 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Aug 2007 07:06:32 -0400
Subject: Ligmail bug?
In-Reply-To: <20070812182439.GA2427@ob41.org>
References: <20070812005057.GA15805@ob41.org> <f9l3m2$hb0$1@sea.gmane.org>
	<20070812182439.GA2427@ob41.org>
Message-ID: <46BEE9B8.8080904@holdenweb.com>

No.23 wrote:
> yes, repeatable:
> 
> Shell:~ >: date
> Sun Aug 12 17:42:10 GMT 2007
> Shell:~ >: gmail.py
> .....
> 
> Shell:~ >: date
> Sun Aug 12 18:21:22 GMT 2007
> Shell:~ >:
> 
> 
>> Is the error repeatable? How many times over what period of time have 
>> you experienced it?
> 
>> No.23 wrote:
>> [way too much, ending with]
>>>    File "/usr/local/lib/python2.5/urllib2.py", line 1076, in do_open
>>>      raise URLError(err)
>>>  urllib2.URLError: <urlopen error (-3, 'temporary failure in name resolution')>
>>>
>>>
>>> other information:
>>> Shell:~ >: uname -a
>>> OpenBSD ob41.org 4.1 ob41#0 i386
>>> Shell:~ >: python
>>> Python 2.5 (r25:51908, Mar  8 2007, 20:46:47)
>>> [GCC 3.3.5 (propolice)] on openbsd4
>>> Type "help", "copyright", "credits" or "license" for more information.
>>>>>> import libgmail
>>>>>> print libgmail.Version
>>> 0.1.6
>>>
>>>
>> So why does a temporary failure in name resolution seem like a library 
>> bug? This is just the library reporting back an error from the network 
>> or transport layer.
>>
>> Is the error repeatable? How many times over what period of time have 
>> you experienced it?
>>
[Please reply via the list when a response is made via the list. You may 
now have detached the follow-ups from your original question, but at 
least if you use the list there's a chance someone else will help you if 
I give up or don't have time. Note I have sent this response to the 
list; you are Cc'd to make sure you pick it up even though it may not 
appear in the same thread.]

Well, now you need to do some investigation of the problem.

The easiest way to do this is to make a local copy of the library that 
is reporting the error (in this case urllib2) - put it in the same 
directory as your program, so it will be picked up in preference to the 
library module, then insert prints at appropriate places to tell you 
what is actually going on as it fails. I think to start with you may 
want to look at the value of the "host" variable, since it appears that 
it may not be resolving, and see of you can resolve the same host 
yourself. It's possible someone is just using or referencing a bogus 
domain name, but you need solid information before deciding whether it's 
a bug or a feature.

If you come across more puzzling behavior that you need the list's help 
with then please try to use short code samples, and avoid including 
thousands of lines of output that don't add anything to the description 
of the problem.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From bbxx789_05ss at yahoo.com  Wed Aug 22 19:03:02 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Wed, 22 Aug 2007 16:03:02 -0700
Subject: Learning Python using a book based on version 1.5
In-Reply-To: <1187814437.775758.159510@e9g2000prf.googlegroups.com>
References: <1187814437.775758.159510@e9g2000prf.googlegroups.com>
Message-ID: <1187823782.264415.294570@r23g2000prd.googlegroups.com>

dogatemycomputer at gmail.com wrote:
> Greetings,
>
> A friend of mine dropped off a copy of Sams Teach Yourself Python in
> 24 Hours published in 2000.  I skimmed the first couple of chapters
> looking for the interpreter version and the book was based on version
> Python version 1.5.
>
> Is this book still relevant?   Should I toss it and look for something
> newer?
>
> Any thoughts would be appreciated.
>
> Best Regards,
> Dave

The Sam's 24 hour books are wonderful tutorials(who wants to waste
more than 24 hours learning a language), and the fact that it's based
on python 1.5 shouldn't make any difference.



From thomas at jollans.com  Mon Aug  6 06:42:10 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Mon, 6 Aug 2007 12:42:10 +0200
Subject: webbrowser.open question force Firefox
In-Reply-To: <e75321bd0708060259p32249f96sa327ec4b505cc981@mail.gmail.com>
References: <e75321bd0708060259p32249f96sa327ec4b505cc981@mail.gmail.com>
Message-ID: <200708061242.11147.thomas@jollans.com>

On Monday 06 August 2007, dimitri pater wrote:
> Hi,
> I have a question regarding the use of webbrowser.open.
> On a windows XP machine, MS-IE is set as the default browser so when I do:
> webbrowser.open('http://localhost:8080') IE starts with this address.
> But in stead of launching IE, I want to launch Firefox *without* setting
> Firefox as the default browser globally on this machine.
>
> Any hints, ideas? Your help is most appreciated.

take an educated guess where to find firefox, check if it's there, and do 
something like
  os.spawnl(os.P_NOWAIT, where_firefox_is, "http://localhost:8080")



-- 
      Regards,                       Thomas Jollans
GPG key: 0xF421434B may be found on various keyservers, eg pgp.mit.edu
Hacker key <http://hackerkey.com/>:
v4sw6+8Yhw4/5ln3pr5Ock2ma2u7Lw2Nl7Di2e2t3/4TMb6HOPTen5/6g5OPa1XsMr9p-7/-6
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From vanrpeterson at gmail.com  Thu Aug 30 09:12:49 2007
From: vanrpeterson at gmail.com (vanrpeterson at gmail.com)
Date: Thu, 30 Aug 2007 06:12:49 -0700
Subject: Creating a multi-tier client/server application
In-Reply-To: <7xy7ft4fqg.fsf@ruckus.brouhaha.com>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
	<7xy7ft4fqg.fsf@ruckus.brouhaha.com>
Message-ID: <1188479569.948608.306120@e9g2000prf.googlegroups.com>

We totally agree with your software engineering goals.  Relying on
wxPython and minimizing web reliance brings sanity to the enterprise.
We too love PostgreSQL and avoid XML whether cleaned by SOAP at all
costs.  We have found the object-relationship managers to be bloated
and unruly.   What are you building and how many hours per month are
you willing to spend supporting it?



From jstroud at mbi.ucla.edu  Sun Aug 19 23:17:08 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 19 Aug 2007 20:17:08 -0700
Subject: How do I call anonymous classes from imported modules?
In-Reply-To: <mailman.2179.1187578824.22759.python-list@python.org>
References: <mailman.2179.1187578824.22759.python-list@python.org>
Message-ID: <fab13k$9tn$1@zinnia.noc.ucla.edu>

JoeSox wrote:
> I am importing 3rd party modules via a plugin script. I wish to
> iterate thru the modules and call a common method like .do_foobar() or
> something with all the imports.
> But I can't figure out how to do something like below without knowing
> the class name before hand.  Is there a builtin that helps call
> classes anonymously?
> 
> 
> (Calling example.do_foobar() works because I manually enter the classes' name)
> 
>>>>a=MyApp()
>>>>sensorsList = []
>>>>for snames in a.pluginsDict["sensorsplugins"]:
> 
> 		sensorsList.append(__import__(snames))
> 
>>>>sensorsList[0].example.do_foobar()
> 
> 
> but I need something like
> 
>>>>sensorsList[0][0].do_foobar()
> 
> because I will not know the plugin class names.
> 

Quick and dirty (you could also use a try: except:):

f = __import__(module_name)
for anobj in f.__dict__.values():
   if hasattr(anobj, 'do_foobar'):
     anobj.do_foobar()

Note that this does not test whether anobj is a class as this would 
entail a type-check, which hints to poor design.

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From crodetsky at gmail.com  Mon Aug 13 13:10:18 2007
From: crodetsky at gmail.com (srage)
Date: Mon, 13 Aug 2007 17:10:18 -0000
Subject: Assignments and Variable Substitution
In-Reply-To: <f9q2qn$i4v$1@solaris.cc.vt.edu>
References: <f9q2qn$i4v$1@solaris.cc.vt.edu>
Message-ID: <1187025018.744809.103030@l70g2000hse.googlegroups.com>

On Aug 13, 1:00 pm, brad <byte8b... at gmail.com> wrote:
> I'd like to do something like this:
>
> var = '123'
> %s = [], %var
>
> So that, in the end, var is '123' and an empty list is named '123' as
> well. The list assignments are created during a loop.
>
> Thanks,
> Brad

You probably want to use a dictionary to store your lists... code
like:

variableDict = {}
variableDict[var] = ['value1', 'value2', 'value3']



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug 22 08:07:57 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 22 Aug 2007 14:07:57 +0200
Subject: Where we need to use Python ?
In-Reply-To: <mailman.5.1187616200.26576.python-list@python.org>
References: <1187596936.136499.200280@l22g2000prc.googlegroups.com>
	<mailman.5.1187616200.26576.python-list@python.org>
Message-ID: <46cc26ed$0$432$426a74cc@news.free.fr>

Terry Reedy a ?crit :
> <gperumal at gmail.com> wrote in message 
> news:1187596936.136499.200280 at l22g2000prc.googlegroups.com...
> | And Is it a interpreted language or a programming language
> | It comes in which category
> 
> Python is an algorithm programming language.
> 
> The CPython implementation of the langauge compiles Python to proprietary 
> byte code 

Hahem... "proprietary" is certainly not the right term here.

> and then interprets the byte code.

(snip the rest)


From marduk at nbk.hopto.org  Sat Aug  4 12:08:30 2007
From: marduk at nbk.hopto.org (marduk)
Date: Sat, 04 Aug 2007 11:08:30 -0500
Subject: the one python book
In-Reply-To: <1186240249.433185.291390@r34g2000hsd.googlegroups.com>
References: <mailman.1611.1186233912.22759.python-list@python.org>
	<b60ti.37345$G23.30474@newsreading01.news.tds.net>
	<1186240249.433185.291390@r34g2000hsd.googlegroups.com>
Message-ID: <1186243710.28026.2.camel@blackwidow.nbk>

On Sat, 2007-08-04 at 15:10 +0000, Michael Tobis wrote:
> Like most people I eventually plan to read Moby Dick, War and Peace,
> and Lutz's Programming Python. Maybe when I retire. 

LOL. Lutz's Programming Python is actually how I learned Python.



From stefan.behnel-n05pAM at web.de  Fri Aug  3 11:50:41 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 03 Aug 2007 17:50:41 +0200
Subject: Replacing _xmlplus.dom.minidom with xml.dom.minidom
In-Reply-To: <mailman.1565.1186149474.22759.python-list@python.org>
References: <1186148352.647143.68890@l70g2000hse.googlegroups.com>
	<mailman.1565.1186149474.22759.python-list@python.org>
Message-ID: <46B34ED1.60402@web.de>

Robert Rawlins - Think Blue wrote:
> Just as a heads up, minidom is pretty inefficient and difficult to work with
> too.
> 
> On someone else's advice I switched over to ElementTree and have been really
> pleased with the results, its much simpler to work with and more efficient
> too.

/and/ lxml.etree is compatible to ElementTree, so once you have written your
code for ElementTree, you can switch to lxml.etree if ever you need things
like XPath, XSLT or validation.

However, as I understand the OP, the question deals with old code, so porting
it to ET (i.e. reimplementing it) might not be that easy...

Stefan


From paul at boddie.org.uk  Fri Aug 31 12:50:19 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Fri, 31 Aug 2007 09:50:19 -0700
Subject: So what exactly is a complex number?
In-Reply-To: <mailman.215.1188576767.28954.python-list@python.org>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<1188576174.3479.9.camel@dot.uniqsys.com>
	<mailman.215.1188576767.28954.python-list@python.org>
Message-ID: <1188579019.141544.292210@50g2000hsm.googlegroups.com>

On 31 Aug, 18:12, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/31/07, Carsten Haese <cars... at uniqsys.com> wrote:
>
> > On Thu, 2007-08-30 at 20:11 -0500, Lamonte Harris wrote:
> > > Like in math where you put letters that represent numbers for place
> > > holders to try to find the answer type complex numbers?
>
> > Is English your native language? I'm having a hard time decoding your
> > question.
>
> I'm pretty sure he was describing middle school algebra.

Yes, I imagine that the "letters that represent numbers" is intended
to refer to this:

http://en.wikipedia.org/wiki/Elementary_algebra

Whereas complex numbers are, of course, described here:

http://en.wikipedia.org/wiki/Complex_number

I hope the above resources are informative for the original inquirer.

Paul



From carsten at uniqsys.com  Mon Aug 20 08:52:28 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 20 Aug 2007 08:52:28 -0400
Subject: Xah's Edu Corner: Under the spell of Leibniz's dream
In-Reply-To: <1187598193.118227.270460@19g2000hsx.googlegroups.com>
References: <1187567809.896668.228650@z24g2000prh.googlegroups.com>
	<1187598193.118227.270460@19g2000hsx.googlegroups.com>
Message-ID: <1187614348.3398.8.camel@dot.uniqsys.com>

On Mon, 2007-08-20 at 01:23 -0700, Ingo Menger wrote:
> On 20 Aug., 01:56, Xah Lee <x... at xahlee.org> wrote:
> 
> > (for you math illiterates out there: ...
> > (for you mathematicians out there: ...
> 
> Please, Xah Lee, could you possibly stop to "explain" things that are
> absolutely trivial? If somebody has doubts about the etymology of a
> word, he may use the dictionary, or he could ask.

And to underline your criticism, allow me to point out the irony:

"No one can write decently who is distrustful of the reader's
intelligence, or whose attitude is patronizing." (From "The elements of
Style" by Strunk and White as quoted by Dijkstra in the very paper Xah
Lee pointed out to us.)

-- 
Carsten Haese
http://informixdb.sourceforge.net




From __peter__ at web.de  Mon Aug 13 04:48:12 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 13 Aug 2007 10:48:12 +0200
Subject: verify whether "str" is still callable in Python 2.5.1
References: <1186994287.527549.119170@19g2000hsx.googlegroups.com>
Message-ID: <f9p5sc$oar$01$1@news.t-online.com>

Ge Chunyuan wrote:

> Once use ActivePython latest version for Python 2.5.1.
> I happened to find function "str" is not callable, but it is available
> for Python 2.5.

If it's not callable it's not the str() function, but something else with a
badly chosen variable name.

>>> callable(str)
True
>>> str = "yadda"
>>> callable(str)
False

Peter


From Shawn at Milochik.com  Mon Aug 20 13:29:48 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Mon, 20 Aug 2007 13:29:48 -0400
Subject: reading a line in file
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>
Message-ID: <2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com>

Write some code, even if it doesn't quite work, and post it. We'll
help you fix it.

You can open a file with:  input = open("file.txt", "r")

You can read a line with: someText = input.readline()

You can loop through an open file like this:

for line in input:
    #do something with line


That should get you started.


From nospam at nospam.com  Thu Aug  2 17:27:33 2007
From: nospam at nospam.com (Gilles Ganault)
Date: Thu, 02 Aug 2007 23:27:33 +0200
Subject: Reading a two-column file into an array?
References: <a1dta3lqp9em5b7ci6pn5q4uprhsp0e8qv@4ax.com>
	<1185857837.610635.206270@e9g2000prf.googlegroups.com>
	<5h81mbF3j641tU1@mid.uni-berlin.de>
	<1i23xec.1r6z2ai14ntdgxN%aleax@mac.com>
Message-ID: <v0j4b399l37gf6ild278hrskh4ruu55tvl@4ax.com>

On Tue, 31 Jul 2007 08:41:45 -0700, aleax at mac.com (Alex Martelli)
wrote:
>That's what 2.5's with statement is all about...:

Thanks everyone. Python power :-)

from __future__ import with_statement
import csv

with open('import.csv', 'rb') as f:
	for item in list(csv.reader(f, delimiter='\t')):
		print item[0] + "," + item[1]


From martin at v.loewis.de  Wed Aug  8 16:39:45 2007
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 08 Aug 2007 22:39:45 +0200
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <MBpui.37519$G23.36050@newsreading01.news.tds.net>
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
	<eICti.37400$G23.15165@newsreading01.news.tds.net>
	<41Dti.37401$G23.10727@newsreading01.news.tds.net>
	<1186582066.096793.14700@57g2000hsv.googlegroups.com>
	<slrnfbk05n.20o.horpner@FIAD06.norwich.edu>
	<1186600271.858692.182090@22g2000hsm.googlegroups.com>
	<7xmyx1bxkf.fsf@ruckus.brouhaha.com>
	<MBpui.37519$G23.36050@newsreading01.news.tds.net>
Message-ID: <46BA2A11.6030307@v.loewis.de>

> I don't see how file() can be "removed", actually, unless the
> file type itself is getting axed.

Indeed, that's the case. Py3k won't use stdio for file input and
output, but the io module.

Regards,
Martin


From hg at nospam.org  Fri Aug  3 18:34:26 2007
From: hg at nospam.org (hg)
Date: Fri, 03 Aug 2007 17:34:26 -0500
Subject: Eclipse/PyDev question.
References: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>
Message-ID: <S3Osi.173945$wG2.172679@newsfe17.lga>

king kikapu wrote:

> Hi,
> this is actually a question to those of us who use Eclipse and Pydev
> as their main Python developing environment. As i use Eclipse (3.3
> Europa) only for Python and i have nothing to do with Java, is there a
> way to disable/uninstall some Java-specific stuff and make the
> environment actually more snappy ??
> 
> thanks for any help
I like pydev and purchased the extensions ... there are bugs of course but
what stopped me from using it is a project were I had some very large files
(my fault).

I stopped using it and went for wing dev (I need Windows and Linux access)
and "there are bugs of course" ... but it is snappier.

I still like pydev and will try it again ... once I can afford a faster PC /
or have the time to re-factor my code.


PS: I just got today news about a "free" version of wing dev .. .worth the
try.

hg




From greg at cosc.canterbury.ac.nz  Fri Aug 31 20:15:23 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sat, 01 Sep 2007 12:15:23 +1200
Subject: ANN: PROBE 1.0
Message-ID: <mailman.275.1188657502.28954.python-announce-list@python.org>

I have released an updated version of my PyWeek4
game competition entry, PROBE.

In PROBE, you get to plan and execute space probe
missions to other planets, using a fairly realistic
(except for a couple of things) simulation of the
physics involved.

This version has been greatly expanded, and can
actually be played in a deliberate way now instead
of just trial and error like the first one.

Currently available here:

http://www.cosc.canterbury.ac.nz/greg.ewing/python/PyWeek4/Probe-1.0.zip

--
Greg


From raims at dot.com  Mon Aug 13 18:33:01 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Tue, 14 Aug 2007 00:33:01 +0200
Subject: chmod g+ Equivalent
References: <1187042290.821786.178420@19g2000hsx.googlegroups.com>
Message-ID: <1i2t81z.1f4cmrhu1sy8iN%raims@dot.com>

milan_sanremo <hancock.robert at gmail.com> wrote:
> I've read the documentation on os.chmod() and can implement all the
> standard commands, but what is the syntax for the equivalent of chmod g
> + to set the group id?

chmod() [1] takes as the second parameter a bitwise or-ed combination of
a series of values. If you look at chmod's man page ("man 2 chmod" on
the shell) you can see the following values for the group id (I have OSX
so the actual value may be different on your OS):

           #define S_IRWXG 0000070    /* RWX mask for group */
           #define S_IRGRP 0000040    /* R for group */
           #define S_IWGRP 0000020    /* W for group */
           #define S_IXGRP 0000010    /* X for group */

So you just have to OR them to accomplish your goal.  

1 - <http://docs.python.org/lib/os-file-dir.html#l2h-2677>

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From zzbbaadd at aol.com  Thu Aug 30 14:21:13 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Thu, 30 Aug 2007 11:21:13 -0700
Subject: list index()
In-Reply-To: <mailman.154.1188497511.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<1188496588.750629.208100@g4g2000hsf.googlegroups.com>
	<mailman.154.1188497511.28954.python-list@python.org>
Message-ID: <1188498073.997168.282420@q5g2000prf.googlegroups.com>

> While I agree that Bruno's response was perhaps needlessly snippy, your
> original question was needlessly inflammatory, as if you somehow wanted
> some "religious zealot" to act the way Bruno did. If we start labeling
> people, this thread will earn you a label that rhymes with "roll".
>
That is correct. I did word it in a way that would hook the Bruno's of
the group. But I will probably have some more important questions so I
will word it differently in the future. Such as: I wish they were not
getting rid of dict.has_key() in Python 3, which I prefer to IN.




From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Fri Aug 31 14:25:01 2007
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J. Fromberger)
Date: Fri, 31 Aug 2007 14:25:01 -0400
Subject: fcntl problems
References: <1188512377.441241.107900@q4g2000prc.googlegroups.com>
	<1188515889.352267.220790@q5g2000prf.googlegroups.com>
	<mailman.186.1188541398.28954.python-list@python.org>
	<1188568022.988154.188230@y42g2000hsy.googlegroups.com>
	<mailman.200.1188571375.28954.python-list@python.org>
	<1188573280.155018.109360@o80g2000hse.googlegroups.com>
Message-ID: <Michael.J.Fromberger-537671.14250031082007@localhost>

In article <1188573280.155018.109360 at o80g2000hse.googlegroups.com>,
 "mhearne808[insert-at-sign-here]gmail[insert-dot-here]com" 
 <mhearne808 at gmail.com> wrote:

> Looking at my flock(3) man page, I'm guessing that "35" is the error
> code for EWOULDBLOCK.  Which system header file am I supposed to look
> in to figure that magic number out?

On a MacOS system, you can find them in /usr/include/sys/errno.h
On a Linux system, try /usr/include/asm-generic/errno.h

However, if you're writing in Python, you will probably have an easier 
time using the "errno" module, e.g., 

 ] import errno
 ] errno.errorcode[35]
 'EDEADLOCK'

Note that some codes have multiple names (e.g., EAGAIN and EWOULDBLOCK) 
so that this lookup may not return exactly the name you're expecting.

Cheers,
-M

-- 
Michael J. Fromberger             | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/  | Dartmouth College, Hanover, NH, USA


From martin at v.loewis.de  Wed Aug 15 18:46:58 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 16 Aug 2007 00:46:58 +0200
Subject: threads, mutual exclusion, and lists
In-Reply-To: <1187206583.255588.57920@e9g2000prf.googlegroups.com>
References: <1187206583.255588.57920@e9g2000prf.googlegroups.com>
Message-ID: <46c38262$0$14338$9b622d9e@news.freenet.de>

> I have two threads that share a python list. One thread adds to the
> list with append(), the other thread removes items with pop().
> 
> My question is -- are python list operations atomic?

Yes, they are in the current implementation of CPython (all versions).
Notice that not *all* operations are atomic (e.g. .sort() is not),
but both append and pop happen to be atomic (which is primarily because
they don't need to call back to user-defined functions, unlike sort).

It's not a language property, though; things may be different in Jython
or IronPython.

Regards,
Martin


From ca.allen at gmail.com  Mon Aug  6 18:18:11 2007
From: ca.allen at gmail.com (Chris Allen)
Date: Mon, 06 Aug 2007 15:18:11 -0700
Subject: Global package variable, is it possible?
In-Reply-To: <87vebt813u.fsf@benfinney.id.au>
References: <1186160415.065108.139160@e9g2000prf.googlegroups.com>
	<46b6d0b4$0$29273$426a74cc@news.free.fr>
	<87vebt813u.fsf@benfinney.id.au>
Message-ID: <1186438691.720218.234850@i13g2000prf.googlegroups.com>

On Aug 6, 2:27 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Bruno Desthuilliers <bruno.42.desthuilli... at wtf.websiteburo.oops.com> writes:
> > I've read all the thread, and it seems that your problem is mostly
> > to share a single dynamic state (the config) between several
> > modules. So I do wonder: have you considered the use of the
> > Singleton pattern (or one of it's variants...) ?
>
> Python modules are effectively singletons. So the idiomatic way to do
> this is to create a module for configuration (perhaps named 'config'),
> import that into every other module that needs it, and use its
> attributes.
>
> --
>  \       "[On the Internet,] power and control will shift to those who |
>   `\       are actually contributing something useful rather than just |
> _o__)                                 having lunch."  -- Douglas Adams |
> Ben Finney

Yes, that's what I ended up doing.  Which is creating a configure
module and then importing it into my modules that use it.  I did
something very similar to the code I posted above.




From b at bcc.com  Tue Aug 14 12:22:04 2007
From: b at bcc.com (Bryan)
Date: Tue, 14 Aug 2007 12:22:04 -0400
Subject: Simple python iteration question
Message-ID: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>

Hi,

I just started with python, and have a for loop question

In c++ (or a number of other languages) I can do this:

for (int i=0, j=0; i < i_len, j< j_len; ++i, ++j) {}

If I have this in python:
l = ['a', 'b', 'c']

I want to get the value and also an iterator:
for i,v in len(l), l:
	print v
	print i

Or something like this without declaring the iterator outside my loop...

How do I do this?
Thanks!


From http  Mon Aug 20 17:29:48 2007
From: http (Paul Rubin)
Date: 20 Aug 2007 14:29:48 -0700
Subject: I Need help from all the group participants
References: <fac7nj$ci9$1@localhost.localdomain>
	<mailman.0.1187630213.32294.python-list@python.org>
	<fack3a$7kk$1@ss408.t-com.hr>
	<1187636668.436474.289220@o80g2000hse.googlegroups.com>
	<facp6k$e0k$1@localhost.localdomain>
	<1187638964.815505.85390@57g2000hsv.googlegroups.com>
Message-ID: <7xd4xh99o3.fsf@ruckus.brouhaha.com>

Jason <tenax.raccoon at gmail.com> writes:
> I want the result of John's auscultation.  Give me
> John's heart beats, or give John death!
> 
> Okay, probably not the last one.

<Dr. Hackenbush takes John's pulse>

"Hmm, either he's dead, or my watch has stopped."
    --Groucho Marx


From hat at se-162.se.wtb.tue.nl  Fri Aug 24 10:25:38 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Fri, 24 Aug 2007 16:25:38 +0200
Subject: Regular expression use
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
Message-ID: <slrnfctqj2.9j4.hat@se-162.se.wtb.tue.nl>

On 2007-08-24, Nick Maclaren <nmm1 at cus.cam.ac.uk> wrote:
> people actually use regular expressions for.  Not the subject
> domain, but the construction of the regular expressions.

This is easy.
I use RE for checking whether some input matches a certain pattern, and
optionally, to extract some special part from the text.

Albert


From sbellon at sbellon.de  Thu Aug  9 02:25:17 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Thu, 9 Aug 2007 08:25:17 +0200
Subject: Destruction of generator objects
References: <20070808002852.6228ae91@cube.tz.axivion.com>
	<1186618661.845525.225010@x35g2000prf.googlegroups.com>
Message-ID: <20070809082517.6af28eaf@cube.tz.axivion.com>

On Thu, 09 Aug, Graham Dumpleton wrote:

>     result = application(environ, start_response)
>     try:
>         for data in result:
>             if data:    # don't send headers until body appears
>                 write(data)
>         if not headers_sent:
>             write('')   # send headers now if body was empty
>     finally:
>         if hasattr(result,'close'):
>             result.close()

Hm, not what I hoped for ...

Isn't it possible to add some __del__ method to the generator object
via some decorator or somehow else in a way that works even with Python
2.4 and can then be nicely written without cluttering up the logic
between consumer and producer?

-- 
Stefan Bellon


From nospam.themindstorm at gmail.com  Fri Aug  3 08:28:52 2007
From: nospam.themindstorm at gmail.com (Alex Popescu)
Date: Fri, 3 Aug 2007 12:28:52 +0000 (UTC)
Subject: File Handling & TRY/EXCEPT
References: <33119.3366124809$1186129744@news.gmane.org>
Message-ID: <Xns99819D235AA22themindstorm@80.91.229.5>

"Robert Rawlins - Think Blue" <robert.rawlins at thinkbluemedia.co.uk>
wrote in news:33119.3366124809$1186129744 at news.gmane.org: 

> This is a multipart message in MIME format.
> 
> ------=_NextPart_000_00B0_01C7D5B0.02EB8BA0
> Hello Guys,
> 
>  
> 
> I'm looking for some advice on how best to handle file read/write
> errors with try/except as i'm a little vague on this, I have a small
> memory leak in my app and I'm starting to think its generated by my
> log file write. For an example of the function look below.
> 
>  
> 
>        def addAppLog(self, event):
> 
>               try:
> 
>                      logfile =
>                      open('/pblue/new/Logs/Application.csv','a') 
> 
>  
> 
>                      now = datetime.datetime.now()
> 
>  
> 
>                      logstring = '%s,%s \n' % (event, str(now))
> 
>  
> 
>                      logfile.write(logstring)
> 
>               except:
> 
>                      self.addAppLog(event)
> 
>               else:
> 
>                      logfile.close()
>

Shouldn't you always close the file? So, a finally block with

if logfile:
  logfile.close()

./alex
--
.w( the_mindstorm )p.



From jkrukoff at ltgc.com  Wed Aug  8 13:34:47 2007
From: jkrukoff at ltgc.com (John Krukoff)
Date: Wed, 8 Aug 2007 11:34:47 -0600
Subject: 'Advanced' list comprehension? query
In-Reply-To: <1186588812.006107.185570@o61g2000hsh.googlegroups.com>
Message-ID: <003b01c7d9e2$6ae3d1a0$0201a8c0@naomi>

pyscottishguy at hotmail.com wrote:
> Hi,
> 
> I'm playing around with list comprehension, and I'm trying to find the
> most aesthetic way to do the following:
> 
> I have two lists:
> 
> noShowList = ['one', 'two', 'three']
> 
> myList = ['item one', 'item four', 'three item']
> 
> I want to show all the items from 'myList' that do not contain any of
> the strings in 'noShowList'.
> 
> i.e. 'item four'
> 
> I can do it like this:
> 
> def inItem(noShowList, listitem):
>     return [x for x in noShowList if x in listitem]
> 
> print [x for x in myList if not inItem(noShowList, x)]
> 
> and I can do it (horribly) with:
> 
> print [x for x in myList if not (lambda y, z:[i for i in y if i in z])
> (noShowList, x)]
> 
> I can also print out the items that DO contain the 'noShowList'
> strings with:
> 
> print [x for x in myList for y in noShowList if y in x]
> 
> but I can't get the 'not' bit to work in the above line.
> 
> Any ideas?
> Thanks!
> 
> --
> http://mail.python.org/mailman/listinfo/python-list

So, conceptually speaking, you're dealing with two loops here, one over the
items to filter, and one over the items to check for substring matches. If
you want to do that with list comprehensions, I'd make it obvious that
there's two of them:

>>> [ listItem for listItem in myList if not [ noShow for noShow in
noShowList if noShow in listItem ] ]
['item four']

This is a pretty good place for the functional programming tools though,
specifically "filter",
http://docs.python.org/tut/node7.html#SECTION007130000000000000000
, which gives a solution that looks like this:

>>> filter( lambda listItem : not [ noShow for noShow in noShowList if
noShow in listItem ], myList )
['item four']

or using purely functional tools, like this:

>>> filter( lambda listItem : not sum( map( lambda noShow: noShow in
listItem, noShowList ) ), myList )
['item four']

All these solutions have the problem that they're still less efficient than
the unwrapped for loop, like so:

>>> aFiltered = []
>>> for listItem in myList:
...     for noShow in noShowList:
...         if noShow in listItem:
...             break
...     else:
...         aFiltered.append( listItem )
...     
>>> aFiltered
['item four']

This is due to the list comprehensions testing all the possiblities, instead
of giving up on the first one found. You can jam that early break into the
functional approach using itertools, but it starts to look really ugly on
one line (requires 2.5 for if expression):

>>> list( itertools.ifilter( lambda listItem : True if len( list(
itertools.takewhile( lambda test : not test, itertools.imap( lambda noShow:
noShow in listItem, noShowList ) ) ) ) == len( noShowList) else False,
myList ) )
['item four']

Which can be made to look much better by breaking the 'noShow in listItem'
test out into a separate function, and does have the advantage that by using
itertools.ifilter this is a lazy approach. There's got to be a better way to
do the test to see if takewhile bailed early than using len, though.

---------
John Krukoff
helot at comcast.net



From dubs0123 at gmail.com  Thu Aug 16 09:54:57 2007
From: dubs0123 at gmail.com (Baisong Du)
Date: Thu, 16 Aug 2007 09:54:57 -0400
Subject: How do you guys convert a tuple into a Set in ABAQUS?
References: <mailman.9708.1187212211.22758.python-list@python.org>
Message-ID: <DreamMail__095457_42104567077@smtp.gmail.com>

A function is defined to get a tuple. 

def searchObjectByRange(partObject, objectType, xRange, yRange, zRange): 
    """In the partObject, search objects (edge, face, etc.) within the 
    given region""" 
    TOLERANCE_GLOBAL = 1.0E-6 
    INFINITE_RANGE = (-1.0E309, 1.0E309) 
    tolerance = TOLERANCE_GLOBAL 
     
    #Convert into list type 
    xyzRange = [xRange, yRange, zRange] 
    for i in range(len(xyzRange)): 
        xyzRange[i] = list(xyzRange[i]) 
        if len(xyzRange[i]) == 0: 
            xyzRange[i] = INFINITE_RANGE 
        else: 
            if xyzRange[i][0] == None: 
                xyzRange[i][0] = INFINITE_RANGE[0] 
            if xyzRange[i][1] == None: 
                xyzRange[i][1] = INFINITE_RANGE[1] 
            if xyzRange[i][0] == xyzRange[i][1]: 
                xyzRange[i][0] = xyzRange[i][0] - tolerance 
                xyzRange[i][1] = xyzRange[i][1] + tolerance 
     
    myObjects = [] 
     
    #Find out the edges within the given region 
    if objectType == 'EDGE': 
        for edge in partObject.edges: 
            ptsList = [] 
            flag = 1 
            ptsList.append(edge.pointOn[0]) 
            #Get the vertices on the edge 
            for index in edge.getVertices(): 
                ptsList.append(partObject.vertices[index].pointOn[0]) 
            for ptCoords in ptsList: 
                if (ptCoords[0] < xyzRange[0][0] or ptCoords[0] > xyzRange[0][1]): 
                    flag = 0 
                    break 
                if (ptCoords[1] < xyzRange[1][0] or ptCoords[1] > xyzRange[1][1]): 
                    flag = 0 
                    break 
                if (ptCoords[2] < xyzRange[2][0] or ptCoords[2] > xyzRange[2][1]): 
                    flag = 0 
                    break 
            if flag == 1: 
                myObjects.append(edge)  
    myObjects= tuple(myObjects)  
    return myObjects

sub_1=searchObjectByRange(myModel.parts['Part-1'], 'EDGE', (), (), (0, 0))  #Getting EDGES has the same z-coordinate, and I 166 edges are obtained.
myModel.parts['Part-1'].Set(edges=sub_1,name='sub_set') #I wish to get the set 'sub_set', but doen't work.


  The error shows "TypeError: edges; too many arguments; expected 0, got 166". 


Is there somebody can help me with that? Thanks.


Baisong

From almadhu at gmail.com  Tue Aug  7 00:29:16 2007
From: almadhu at gmail.com (Madhu Alagu)
Date: Tue, 07 Aug 2007 04:29:16 -0000
Subject: Web based Reporting tool for Python
Message-ID: <1186460956.945148.162610@k79g2000hse.googlegroups.com>

Hi



I am looking template based report tools for python.It has the ability
to deliver rich content onto the screen, to the printer or into PDF,
HTML, XLS, CSV and XML files.





Thanks,

Madhu Alagu



From p.f.moore at gmail.com  Wed Aug 15 11:13:47 2007
From: p.f.moore at gmail.com (Paul Moore)
Date: Wed, 15 Aug 2007 08:13:47 -0700
Subject: Memory leak when creating lots of object
In-Reply-To: <1187067442.084074.55010@z24g2000prh.googlegroups.com>
References: <1187067442.084074.55010@z24g2000prh.googlegroups.com>
Message-ID: <1187190827.395382.85740@57g2000hsv.googlegroups.com>

On 14 Aug, 05:57, Godzilla <godzillais... at gmail.com> wrote:
> Hello,
>
> I have a program that create and pop an object off a queue, but it is
> experiencing some memory leakage. I have been unable to detect where
> the memory leakage occur. The strange thing is when i replace the
> object creation with a plain integer/string, the leak goes away...
> Here's the code I used as my test:
[...]
> I can see the memory usage increases slowly in Task Manager under XP,
> but do not know why. Anyone help?

I tried your code on my (Windows XP SP2, Python 2.5) system. No memory
leak here - I left it running for over 5 minutes and memory usage was
static at just under 4MB.

Do you see memory growth with precisely this code? Over what period?
How much?

Paul.



From horpner at yahoo.com  Thu Aug 30 14:51:39 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 30 Aug 2007 18:51:39 GMT
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<1188496588.750629.208100@g4g2000hsf.googlegroups.com>
	<mailman.154.1188497511.28954.python-list@python.org>
	<1188498073.997168.282420@q5g2000prf.googlegroups.com>
	<mailman.156.1188498891.28954.python-list@python.org>
	<1188499525.827573.128170@x35g2000prf.googlegroups.com>
Message-ID: <slrnfde4lp.1v4.horpner@FIAD06.norwich.edu>

On 2007-08-30, zzbbaadd at aol.com <zzbbaadd at aol.com> wrote:
>> That wish will only come true if you maintain your own fork of
>> Python 3. has_key() will go away, period. It has been made
>> obsolete by "in", which is faster and more concise.
>
> Is there really some reason  "key" IN dict can be implemented
> faster than dict.has_key("key")???

Yes. Looking up the has_key method by name is the slower part.

-- 
Neil Cerutti
We're not afraid of challenges. It's like we always say: If you want to go out
in the rain, be prepared to get burned. --Brazillian soccer player


From gandalf at shopzeus.com  Fri Aug 17 08:13:47 2007
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Fri, 17 Aug 2007 14:13:47 +0200
Subject: advice about `correct' use of decorator
In-Reply-To: <46C4C1B4.6050605@fmed.uba.ar>
References: <46C4B097.4080309@fmed.uba.ar> <46C4B81A.8000304@shopzeus.com>
	<46C4C1B4.6050605@fmed.uba.ar>
Message-ID: <46C590FB.9090403@shopzeus.com>


>>
>> Are you developing a website or a GUI program?
>>
>>
> It will be used in a web development. It is an important point?
Yes, I think. Unless you use AJAX. :-) Most web sites work this way:

user clicks -> request to server -> process on server -> response

I would rather enclose the whole handler in try/except and raise a 
custom PermissionDenied exception when the user has inscuficient 
permissions. There are problems with a decorator used for authorization. 
The context needs to be determined. E.g. which user is accessing the 
method? (It can be hard to tell if the method is part of a thread object 
that lies in a thread pool and is shared between simultaneous 
clients...) Also it might be that the method's purpose is to change 
objects of the same class, and the user has permission to modify one 
object but not the other. In this case, authorization must be done 
inside the function call... How do you express this with a decorator?

These are just ideas. You should analyze your problem and make your 
decision. If you only want to restrict access to functions, then 
probably using decorators is perfect.

Best,

   Laszlo



From __peter__ at web.de  Mon Aug 27 11:56:29 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 27 Aug 2007 17:56:29 +0200
Subject: How to free memory ( ie garbage collect) at run time with Python
	2.5.1(windows)
References: <1188224306.863247.127890@50g2000hsm.googlegroups.com>
	<1i3hujk.ulsjt32wqtq0N%aleax@mac.com>
Message-ID: <faus7d$hda$00$1@news.t-online.com>

Alex Martelli wrote:

> Integer objects that are once generated are kept around in a "free list"
> against the probability that they might be needed again in the future (a

Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> x = 1000
>>> y = 1000
>>> x is y
False

Why don't x and y point to the same object then?

Peter
 



From hniksic at xemacs.org  Mon Aug 13 07:25:31 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Mon, 13 Aug 2007 13:25:31 +0200
Subject: Fatest standard way to sum bytes (and their squares)?
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
	<87r6m8egee.fsf@mulj.homelinux.net>
	<ntGdnTuqYbgzPyLbnZ2dnUVZ_gadnZ2d@speakeasy.net>
Message-ID: <87lkcfbrro.fsf@mulj.homelinux.net>

Erik Max Francis <max at alcyone.com> writes:

> Hrvoje Niksic wrote:
>
>> For ordinalSum, using imap is almost twice as fast:
>> $ python -m timeit -s 'data=[chr(x) for x in xrange(256)]'
>> 'sum(ord(x) for x in data)'
>> 10000 loops, best of 3: 92.4 usec per loop
>> $ python -m timeit -s 'data=[chr(x) for x in xrange(256)]; from itertools import imap' 'sum(imap(ord, data))'
>> 10000 loops, best of 3: 55.4 usec per loop
>
> You're using data which is a list of chars (strings), rather than a
> string itself, which is what the format is in.  The imap
> optimization doesn't appear to work quite as dramatically well for
> me with strings instead of lists, but it certainly is an
> improvement.

I wouldn't expect to see any difference in strings and lists.  In this
simple test I get approximately the same ~1.7x speedup:

$ python -m timeit 'sum(ord(x) for x in "abcdefghijklmnopqrstuvwxyz")'
100000 loops, best of 3: 12.7 usec per loop
$ python -m timeit -s 'from itertools import imap' 'sum(imap(ord, "abcdefghijklmnopqrstuvwxyz"))'
100000 loops, best of 3: 7.42 usec per loop


From Brian.McCann at viziant.net  Mon Aug 20 13:10:23 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Mon, 20 Aug 2007 13:10:23 -0400
Subject: reading a line in file
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>

 
Hi,
 
does anyone have a good example of how to read a line in a file?

say you have a file build.log and in the file are values like

buildnum = 1
date = 20070820

I know how to read the contents and write them to a file, but how would one
grab just the date or build number in order to create a directory named 20070820_build1

Thanks,
Brian

 
<mailto:brian.mccann at viziant.net> 
 
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From ptmcg at austin.rr.com  Wed Aug  1 00:16:43 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 31 Jul 2007 21:16:43 -0700
Subject: split a string of space separated substrings - elegant solution?
In-Reply-To: <46af9beb$0$14242$ba620e4c@news.skynet.be>
References: <46af9beb$0$14242$ba620e4c@news.skynet.be>
Message-ID: <1185941803.577841.178550@l70g2000hse.googlegroups.com>

On Jul 31, 3:30 pm, Helmut Jarausch <jarau... at skynet.be> wrote:
> I'm looking for an elegant solution to the following (quite common)
> problem:
>
> Given a string of substrings separated by white space,
> split this into tuple/list of elements.
> The problem are quoted substrings like
>
> abc "xy z"  "1 2 3"  "a \" x"
>
> should be split into  ('abc','xy z','1 2 3','a " x')
>

Pyparsing has built-in support for special treatment of quoted
strings.  Observe:

from pyparsing import *

data = r'abc "xy z"  "1 2 3"  "a \" x"'

quotedString.setParseAction(removeQuotes)
print OneOrMore(quotedString |
                    Word(printables) ).parseString(data)

prints:

['abc', 'xy z', '1 2 3', 'a \\" x']

Or perhaps a bit trickier, do the same while skipping items inside /*
*/ comments:

data = r'abc /* 456 "xy z" */  "1 2 3"  "a \" x"'

quotedString.setParseAction(removeQuotes)
print OneOrMore(quotedString |
                    Word(printables) ) \
                    .ignore(cStyleComment).parseString(data)

prints:

['abc', '1 2 3', 'a \\" x']


-- Paul



From stefan.behnel-n05pAM at web.de  Thu Aug 30 03:17:59 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Thu, 30 Aug 2007 09:17:59 +0200
Subject: replacing xml elements with other elements using lxml
In-Reply-To: <1188438371.064824.13020@l22g2000prc.googlegroups.com>
References: <1188399381.188639.289480@57g2000hsv.googlegroups.com>
	<46D5A272.2000509@web.de>
	<1188428655.300330.213430@r29g2000hsg.googlegroups.com>
	<1188438371.064824.13020@l22g2000prc.googlegroups.com>
Message-ID: <46D66F27.5040308@web.de>

Ultrus wrote:
> Ah! I figured it out. I forgot that the tree is treated like a list.
> The solution was to replace the <random> element with the first <item>
> child, then use Python's insert(i,x) function to insert elements after
> the first one.

You could also use slicing, something like:

    parent[2:3] = child[1:5]

should work.


> lxml rocks!

I know, but it feels good to read it once in a while. :)

Stefan


From gherzig at fmed.uba.ar  Thu Aug 23 15:49:19 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Thu, 23 Aug 2007 16:49:19 -0300
Subject: advice about `correct' use of decorator
In-Reply-To: <740c3aec0708230520h6a92a29ar180efed41730f563@mail.gmail.com>
References: <46C4B097.4080309@fmed.uba.ar>	<740c3aec0708170529s6f7e7fe2l8c92771c2d0a51d4@mail.gmail.com>	<46C5C9AE.5020508@fmed.uba.ar>	<mailman.112.1187787625.32294.python-list@python.org>	<1187792001.935204.42330@e9g2000prf.googlegroups.com>
	<740c3aec0708230520h6a92a29ar180efed41730f563@mail.gmail.com>
Message-ID: <46CDE4BF.6030409@fmed.uba.ar>

BJ?rn Lindqvist wrote:

>On 8/22/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>  
>
>>On 22 ago, 10:00, "BJ?rn Lindqvist" <bjou... at gmail.com> wrote:
>>    
>>
>>>As I said, you can accomplish the exact same thing by calling a
>>>function from within the function that requires the user to be logged
>>>in.
>>>
>>>def change_pass():
>>>    check_user_logged_in()
>>>    ... more stuff here...
>>>
>>>is less complex (and therefore preferable) than:
>>>
>>>@check_user_logged_in
>>>def change_pass():
>>>    ... more stuff here...
>>>
>>>An important principle in engineering is that you should always strive
>>>to make your design as simple as possible. If you have two equal
>>>designs, you should always choose the one that is simpler because
>>>simple things are easier to understand than complex things.
>>>      
>>>
>>I don't see the complexity in this case - both are a single line of
>>code. Any internal complexity is hidden by the language. In fact, I
>>    
>>
>
>"Hiding" doesn't reduce complexity, quite the opposite.
>
>  
>
>>consider the decorated function simpler than the other: its body
>>represents exactly what the function does, without any distracting
>>precondition calls.
>>    
>>
>
>Think about how the decorator is implemented. It is a high order
>function, taking a function and returning a new function. Something
>like this:
>
>def check_user_logged_in(func):
>    def f(*args, **kwargs):
>        if global_state.the_user.is_logged_in:
>            return func(*args, **kwargs)
>        return show_login_page()
>    return f
>
>@check_user_logged_in
>def change_pass():
>    ... more stuff here...
>
>or:
>
>def check_user_logged_in():
>    return global_state.the_user.is_logged_in
>
>def change_pass():
>    if not check_user_logged_in():
>        return show_login_page()
>    ... more stuff here ...
>
>or even:
>
>def change_pass():
>    if not global_state.the_user.is_logged_in:
>        return show_login_page()
>    ... more stuff here ...
>
>  
>
>>The decorator has some advantages: can have syntax support on your
>>editor, can perform some registering/logging, it's even easier to
>>quickly check visually if it's here.
>>    
>>
>
>The decorator has just as many disadvantages. For example, what if you
>want to redirect back to the change_pass page once the user has
>pressed the Login button on the login_page? Or if you want to show
>different login pages depending on user properties? How much control
>flow do you really want to "hide" in your decorator?
>
>  
>
Thanks Bj?rn. Maybe im blind here in my intent to use decorators 
somewhere, but even re-checking you samples (pretty much the kind of 
example i show to my boss), it looks nicer (to me) when using a 
decorator!! I guess im becoming a  `deco junky' :)

Later you expose some interesing points about that login page and 
redirecting stuff...well, im my case, the login page does depends on 
user properties, wich (at this point) are stored in a `session data 
variable' (actually a table row), so the login pages take care about 
user properties, not the decorator itself, but the other part of the page.

I guess decorators has is own public, well, im one of that public. Let 
my be with my deco-junk alone, you bastard :)

Thanks a lot for your opinnions, guys!
Gerardo


From nmin at freenet.de  Wed Aug  8 08:10:29 2007
From: nmin at freenet.de (nmin at freenet.de)
Date: Wed, 08 Aug 2007 05:10:29 -0700
Subject: Jython - problem import os
Message-ID: <1186575029.494729.327550@b79g2000hse.googlegroups.com>

Hi.

I'm using Jython in combination with Java, webservices and jboss4.0.4.

The webservice is implemented in java and creates an PythonInterpreter
object which loads the jython scripts.
I wrote an jython script which uses a function from another jython
file called library.py.

So, i wrote:

service.java
========

public void webMethod(){
PythonInterpreter p = new PythonInterpreter()

p.execfile(skript.py)
}

skript.py
======
from library import *

test=testFunction()

library.py
=======

import os

def testFunction():
    os.getcwd()


...all these files are inside my ear-archive and the service.java
represent my webservice class.
So, calling WebMethod returns:

ImportError: no module named javaos in library.py.

Any ideas?



From steve at REMOVE.THIS.cybersource.com.au  Thu Aug  2 08:40:50 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 02 Aug 2007 22:40:50 +1000
Subject: Python end of file marker similar to perl's __END__
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
	<1185976656.753817.27980@x40g2000prg.googlegroups.com>
	<874pjidcvv.fsf@benfinney.id.au>
Message-ID: <pan.2007.08.02.12.40.48.911929@REMOVE.THIS.cybersource.com.au>

On Thu, 02 Aug 2007 10:00:04 +1000, Ben Finney wrote:

> beginner <zyzhu2000 at gmail.com> writes:
> 
>> Thanks everyone for responding. It doesn't look like python has
>> it. I would definitely miss it. As Steve said, the nice thing about
>> __END__ is that things below __END__ do not have to have legit
>> syntax.
> 
> I think the unaddressed question is: Why is there so much code in your
> module with invalid syntax that this trick would be useful?

It's not just "bad syntax" that makes the triple-quote or comment trick
useful. Sometimes you're experimenting, or perhaps tinkering is a better
description. Your aim isn't to end up with a working piece of code, but to
learn something (e.g. "how do decorators work?"). You may end up with
working code at the end, but the finished code isn't the aim of the
exercise and may not be kept.

Because you're experimenting, you might end up with ten different versions
of a function, and not all of them will compile, let alone execute
correctly. It's handy to be able to comment them out and reload() the
file, and while some editors will do bulk comment/uncomment of text, the
triple-quoted string trick is easy enough that you can use it in
Microsoft's Notepad.


>> That let me focus on the lines of code I am debugging and do not
>> have to worry about some bad syntax down the line. This feature is
>> especially handy if I am, saying, replacing modoules or changing
>> data structures.
> 
> I would strongly recommend you examine what part of your practice is
> leading you to write so much code with invalid syntax, without
> immediately testing and fixing it. Eliminate that part of the process
> -- possibly with test-driven development.

While the discipline of TDD is good and useful, there's a time and place
for unstructured and informal experimentation too.


-- 
Steven.



From jmcmonagle at velseis.com.au  Fri Aug 24 00:20:49 2007
From: jmcmonagle at velseis.com.au (John McMonagle)
Date: Fri, 24 Aug 2007 14:20:49 +1000
Subject: creating a tar file with python
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
Message-ID: <46CE5CA1.9070505@velseis.com.au>

Brian McCann wrote:
> Hi,
>  
> I'm trying to create a tar file of the contents of the current directory
>  
> right now there is only one file "text.xml" in the current dir,  I'm 
> using"." current dir as source
> but that gives syntax error
> 
> any help would be greatly appreciated
> --Brian
>  
>  
> #!/usr/bin/python
> import string
> import os
> import sys
> import time
> import errno
> import shutil
> import tarfile
>  
> 
> tar = tarfile.open(.,"test.tar.gz", "w:gz)

Contents of current directory in a new gzipped tarfile (includes 
"hidden" *nix files):


import tarfile, glob
t = tarfile.open('tarfilename.tar.gz', 'w:gz')
for filename in glob.glob('*')+glob.glob('.*'):
     t.add(filename)
t.close()

Note: this includes any subdirectories and their files below the current 
level.

Regards,

John





From ca.allen at gmail.com  Mon Aug  6 18:16:15 2007
From: ca.allen at gmail.com (Chris Allen)
Date: Mon, 06 Aug 2007 15:16:15 -0700
Subject: Global package variable, is it possible?
In-Reply-To: <46b6d0b4$0$29273$426a74cc@news.free.fr>
References: <1186160415.065108.139160@e9g2000prf.googlegroups.com>
	<46b6d0b4$0$29273$426a74cc@news.free.fr>
Message-ID: <1186438575.861738.173900@g12g2000prg.googlegroups.com>

On Aug 6, 12:41 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> Chris Allen a ?crit :
>
>
>
> > Hello fellow pythoneers.  I'm stumped on something, and I was hoping
> > maybe someone in here would have an elegant solution to my problem.
> > This is the first time I've played around with packages, so I'm
> > probably misunderstanding something here...
>
> > Here's what I'd like to do in my package.  I want my package to use a
> > configuration file, and what I'd like is for the config file to appear
> > magically in each module so I can just grab values from it without
> > having to load and parse the config file in each package module.  Not
> > quite understanding how the __init__.py file works, I expected it to
> > be as easy as just setting up the ConfigParser object and then I
> > figured (since a package is a module) that it would now be global to
> > my package and I could access it in my modules, but I was wrong...  I
> > don't want to have to pass it in to each module upon init, or anything
> > lame like that.  A main reason for this is that I'd like to be able to
> > reload the config file dynamically and have all my modules
> > automatically receive the new config.  There must be a way to do this,
> > but seeing how __init__.py's namespace is not available within the
> > package modules, I don't see a simple and elegant way to do this.
> > Does anybody have any suggestions?  Thanks!
>
> Hi Chris...
> I've read all the thread, and it seems that your problem is mostly to
> share a single dynamic state (the config) between several modules. So I
> do wonder: have you considered the use of the Singleton pattern (or one
> of it's variants...) ?

Thanks, I don't know anything about python singletons.  But I'll look
it up.



From Brian.McCann at viziant.net  Thu Aug 23 20:20:17 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Thu, 23 Aug 2007 20:20:17 -0400
Subject: creating a tar file with python
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
	<faktv8$8fs$1@sea.gmane.org>
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE2EC@efmailx>

Hi, 
 
I tried Steve's solution but get this error
using the tar script below
--Brian 

tar = tarfile.open(".","test.tar.gz",w:gz)
[viz at vizbld02 tmp]$ ./tarup.py
  File "./tarup.py", line 24
    tar = tarfile.open(".","test.tar.gz",w:gz)
                                          ^
SyntaxError: invalid syntax
######################################################
 
#!/usr/bin/python
import string
import os
import sys
import time
import errno
import shutil
import tarfile

tar = tarfile.open(".","test.tar.gz",w:gz)

<mailto:brian.mccann at viziant.net> 
 
 

________________________________

From: python-list-bounces+brian.mccann=viziant.net at python.org on behalf of Steve Holden
Sent: Thu 8/23/2007 5:24 PM
To: python-list at python.org
Subject: Re: creating a tar file with python



Brian McCann wrote:
> Hi,
> 
> I'm trying to create a tar file of the contents of the current directory
> 
> right now there is only one file "text.xml" in the current dir,  I'm
> using"." current dir as source
> but that gives syntax error
>
> any help would be greatly appreciated
> --Brian
> 
> 
> #!/usr/bin/python
> import string
> import os
> import sys
> import time
> import errno
> import shutil
> import tarfile
> 
>
> tar = tarfile.open(.,"test.tar.gz", "w:gz)
> <mailto:brian.mccann at viziant.net>
> 
>
well, /probably/ (meaning I haven't done any testing) you need quotes
around the name of the current directory just like you do around the
name of the file. Try

   tar = tarfile(".", "test.tar.gz", "w:gz")

regards
  Steve
--
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------

--
http://mail.python.org/mailman/listinfo/python-list


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From horpner at yahoo.com  Fri Aug  3 13:07:47 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 03 Aug 2007 17:07:47 GMT
Subject: (no) fast boolean evaluation ?
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<cfb58d850708021619s298f69b9p3af86905d1695939@mail.gmail.com>
	<mailman.1551.1186099243.22759.python-list@python.org>
	<46b2e56b$0$18879$426a74cc@news.free.fr>
	<pan.2007.08.03.14.24.23.227662@REMOVE.THIS.cybersource.com.au>
	<46b35069$0$17822$426a74cc@news.free.fr>
	<mailman.1575.1186158943.22759.python-list@python.org>
Message-ID: <slrnfb6ocl.kk.horpner@FIAD06.norwich.edu>

On 2007-08-03, Ed Leafe <ed at leafe.com> wrote:
> On Aug 3, 2007, at 11:57 AM, Bruno Desthuilliers wrote:
>
>> Sorry, I forgot to mention the language did not allow to have else  
>> & if
>> in the same statement. IOW :
>>
>> if some_condition then
>>    do_sometehing
>> else
>>    if some_other_condition then
>>      do_something_else
>>    else
>>      if yet_another_condition then
>>        do_yet_another_thing
>>      else
>>        if your_still_here then
>>           give_up('this language is definitively brain dead')
>>        end if
>>      end if
>>    end if
>> end if
>
> Usually that's because the language provides a switch/case
> statement  construct. If it does and you try to write the above
> code, it isn't  the language that's brain-dead!  ;-)

The switch statements I'm aware of are less generally applicable
than a tower of "if { else if }* else". For example, with a
switch statement you have to dispatch on the one value for every
case.

In some languages, it's even of more limited, e.g., C, which can
switch on only integers.

-- 
Neil Cerutti
Next Sunday Mrs. Vinson will be soloist for the morning service. The pastor
will then speak on "It's a Terrible Experience." --Church Bulletin Blooper


From sisson.j at gmail.com  Tue Aug 28 12:23:39 2007
From: sisson.j at gmail.com (J Sisson)
Date: Tue, 28 Aug 2007 11:23:39 -0500
Subject: Asking all python programmers.
In-Reply-To: <eb79828c0708280847od69b961s2ccb4332ad45a5ab@mail.gmail.com>
References: <eb79828c0708272042x238f575aq28d01964bf6ab1db@mail.gmail.com>
	<2dc0c81b0708280822t70bf0528s4f80fe926cbb91bf@mail.gmail.com>
	<eb79828c0708280847od69b961s2ccb4332ad45a5ab@mail.gmail.com>
Message-ID: <4297a9020708280923j372cd840rc7e3f1dfbf0ea93d@mail.gmail.com>

On 8/28/07, Lamonte Harris <pyth0nc0d3r at gmail.com> wrote:
>
> From a python starter, I don't like the word noob because it sounds very
> unprofessional.
>


Touche`...haha

I second the motion for "Dive Into Python."  It's an excellent book, and you
really can't beat the price (free online as Shawn has pointed out).  I've
also discovered that learning python is easier when you have a defined goal
("learn xyz language" has never cut it for me...I have to have a much more
specific goal in mind to accomplish anything).  For instance, during my
senior project in college, my team lead was worried we wouldn't get enough
data gathered in time to present our work.  I took that opportunity to write
a few Python scripts that would hunt the internet for the data we were
looking for and insert it into our database (after scrubbing/etc...).
Having that specific task (rather, having the specific problem to solve)
accelerated my learning because I was focused on a *real* issue, not a vague
"learn xyz".

Tutorials and challenges, while useful, can't take the place of learning a
language to solve a problem *you* want to solve.  Look for a task that would
make your life easier, then see how you can apply Python to it...
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From exarkun at divmod.com  Mon Aug  6 13:05:07 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 6 Aug 2007 13:05:07 -0400
Subject: udp, datagram sockets
In-Reply-To: <1186416225.769753.307110@o61g2000hsh.googlegroups.com>
Message-ID: <20070806170507.4947.1905302655.divmod.quotient.19571@ohm>

On Mon, 06 Aug 2007 09:03:45 -0700, 7stud <bbxx789_05ss at yahoo.com> wrote:
>I'm trying to understand datagrams.  My client program sends a message
>to the server, and then the server infinitely loops over the recv() to
>make sure all the data was received.  I'm trying to use an * to signal
>the end of the message, so that the server can break out of the
>infinite while loop used to check the recv().  However, my server
>repeatedly outputs the client message over and over again.  Can anyone
>tell me why?

The network is probably dropping some of your data, causing the server
to never see the termination marker.  UDP is difficult to use effectively.
Fortunately, TCP is suitable for many applications.  You should consider
using it, instead.

Jean-Paul


From seberino at spawar.navy.mil  Mon Aug 27 04:12:40 2007
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: Mon, 27 Aug 2007 01:12:40 -0700
Subject: Best open source Python online *CHAT* apps?
Message-ID: <1188202360.562850.24860@e9g2000prf.googlegroups.com>

Best open source Python online chat apps?

I believe there are a few PHP online chat apps to allow people to have
conversation
via a web server but a Python one would soothe the soul.

Any available?

Thanks,

Chris



From mail at timgolden.me.uk  Wed Aug 22 05:18:30 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Wed, 22 Aug 2007 10:18:30 +0100
Subject: Dispatching default application for file, cross platform.
In-Reply-To: <01e101c7e48d$e0e9f860$03000080@hendrik>
References: <01e101c7e48d$e0e9f860$03000080@hendrik>
Message-ID: <46CBFF66.7030207@timgolden.me.uk>

Hendrik van Rooyen wrote:
> How do I do the equivalent of clicking (in SuSe) or double clicking (in Windows)
> on a file?
> 
> In effect I want to tell the OS - take this file and feed it to the application
> that is registered for it.
> 
> Not too sure what to Google for.
> 
> - Hendrik

os.startfile

TJG


From deets at nospam.web.de  Sun Aug 19 15:53:17 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 19 Aug 2007 21:53:17 +0200
Subject: Python on Computation, Math and Statistics
In-Reply-To: <DU0yi.1286$Oo.199@newssvr17.news.prodigy.net>
References: <m_%xi.34088$2v1.7394@newssvr14.news.prodigy.net>
	<5irgvaF3oi5dpU2@mid.uni-berlin.de>
	<DU0yi.1286$Oo.199@newssvr17.news.prodigy.net>
Message-ID: <5irldoF3qonnbU1@mid.uni-berlin.de>

W. Watson schrieb:
> Google? What's that? Thanks. I like to get a insider's view when I know 
> experts are out there. So now I ask a deeper question. Are there matrix 
> computation libraries or even statistical (regression, factor analysis) 
> libraries?

That's your idea of an "in depth question"?

Did you even consider googling the projects I told you about? Reading up 
on them just the tiniest?

http://www.scipy.org/

"""
SciPy (pronounced "Sigh Pie") is open-source software for mathematics, 
science, and engineering. It is also the name of a very popular 
conference on scientific programming with Python. The SciPy library 
depends on NumPy, which provides convenient and fast N-dimensional array 
manipulation. The SciPy library is built to work with NumPy arrays, and 
provides many user-friendly and efficient numerical routines such as 
routines for numerical integration and optimization. Together, they run 
on all popular operating systems, are quick to install, and are free of 
charge. NumPy and SciPy are easy to use, but powerful enough to be 
depended upon by some of the world's leading scientists and engineers. 
If you need to manipulate numbers on a computer and display or publish 
the results, give SciPy a try!
"""

Or do you wish a comprehensive overview as Powerpoint presentation in 
your favorite colors?



Diez


From corrodi.claudio at gmail.com  Wed Aug 15 05:21:26 2007
From: corrodi.claudio at gmail.com (Claudio Corrodi)
Date: Wed, 15 Aug 2007 11:21:26 +0200
Subject: What does r"""any text""" mean ?
In-Reply-To: <f9ucmj$ja2$1@online.de>
References: <f9ucmj$ja2$1@online.de>
Message-ID: <20070815112126.53eef833@earth>

Hi Alexander,

Alexander Eisenhuth wrote:
> ... as you can find in os.py at line 1 ?
This is a raw string. Raw strings don't interpret the escape sequences.
Try this:
>>> print 'a\nb\tc'
a
b       c
>>> print r'a\nb\tc'
a\nb\tc

You needn't use the raw string for printing the backslashes. You can
escape them like this:
>>> print 'a\\nb\\tc'
a\nb\tc


> Regards Alexander
Regards,
Claudio


From mblume at socha.net  Mon Aug 13 11:46:21 2007
From: mblume at socha.net (Martin Blume)
Date: Mon, 13 Aug 2007 17:46:21 +0200
Subject: strftime in python 2.2
References: <1187012631.102571.94210@w3g2000hsg.googlegroups.com>
Message-ID: <46c07ccd$0$3807$5402220f@news.sunrise.ch>

"Flyzone"schrieb
> I'm trying to make work this code in python 2.2.3:
> 
> check=datetime.datetime.today().strftime("%H%M")
> 
> but datetime is not supported in that version but 
> just in the later. I can't upgrade python, too many 
> dependencies in a critical system.
> How can i convert that string to have the same result?
> 

import time
time.strftime("%H%M)

HTH
Martin




From timr at probo.com  Fri Aug  3 02:39:00 2007
From: timr at probo.com (Tim Roberts)
Date: Fri, 03 Aug 2007 06:39:00 GMT
Subject: MIMEText breaking the rules?
References: <rFZri.84932$ml1.74260@fe16.usenetserver.com>
Message-ID: <h7j5b3dv43hgu7qrvg3anprat4pq86jfsg@4ax.com>

Dale Strickland-Clark <dale at riverhall.nospam.co.uk> wrote:
>
>The email module's mimetext handling isn't what you might expect from
>something that appears to behave like a dictionary.
>...
>Having apparently REPLACED my recipient, what I've ended up with is both of
>them.

This behavior is documented in Message.Message, from which MIMEText
eventually inherits.  If you want to start over, delete the item:

  del Msg["To"]

I would have to say that the existing behavior is more intuitive for an
email object.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From jstroud at mbi.ucla.edu  Thu Aug  9 21:31:10 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 09 Aug 2007 18:31:10 -0700
Subject: beginner whitespace question
In-Reply-To: <f9gf03$3al$1@daisy.noc.ucla.edu>
References: <1186703261.136506.208660@x35g2000prf.googlegroups.com>
	<1186703525.591462.122140@m37g2000prh.googlegroups.com>
	<1186704161.334597.218750@z24g2000prh.googlegroups.com>
	<1186707164.095766.243480@q3g2000prf.googlegroups.com>
	<1186708404.901323.204730@g12g2000prg.googlegroups.com>
	<f9gf03$3al$1@daisy.noc.ucla.edu>
Message-ID: <f9gf4u$3al$2@daisy.noc.ucla.edu>

James Stroud wrote:
>     def __unicode__(self):
>     return self.choice

Laughing to hard at the tab & spaces thing to notice the lack of 
indentation here.

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From luca.bertini at email.it  Thu Aug 23 09:24:04 2007
From: luca.bertini at email.it (luca bertini)
Date: Thu, 23 Aug 2007 15:24:04 +0200
Subject: Simple Python Spider
Message-ID: <D0DC914C-8FD0-46DB-8814-191F686C5335@email.it>

Hi everybody, i'm new to the forum so: hello everybody (should I say  
"world"?) ^_^
I'm trying to do a simple spider in python which:

1) ask google a query
2) parse the data

I'm a python newbie so *any* help would be very, very welcommed.
Thanks in advice!

cheers!


From python at rcn.com  Fri Aug 10 12:21:48 2007
From: python at rcn.com (Raymond Hettinger)
Date: Fri, 10 Aug 2007 09:21:48 -0700
Subject: is there anybody using __del__ correctly??
In-Reply-To: <1186731369.073644.158490@z24g2000prh.googlegroups.com>
References: <1186731369.073644.158490@z24g2000prh.googlegroups.com>
Message-ID: <1186762908.121319.35900@x35g2000prf.googlegroups.com>

[Michele Simionato]
>  Here and there I hear rumors about deprecating __del__ and
> nothing
> happens, are there any news about that? Expecially concerning Py3k?

I was writing a Py3K PEP advocating the elimination of __del__
because:

* 'with closing()' and try/finally are the preferred ways of calling
close()

* it is easy to accidently keep or introduce a reference that blocks
the __del__ logic

* under-the-hood, the implementation of __del__ clashes badly with GC
logic and is a maintenance nightmare

* the body of a __del__ method may unintentionally resurrect an object
that was in the process of being deleted

For the PEP to have a chance, I neede to make build-outs to the
weakref module so that existing use cases for __del__ can be easily
migrated.  That hasn't been done yet, so the campaign to eliminate
__del__ is stalled.

> I should mention that if you search comp.lang.python
> for __del__ you will find hundreds of people who were
> bitten by __del__, so I usually give advices such as
> "you should never __del__ in your code"

Good advice. Explicit finalization is almost always preferable.



Raymond Hettinger



From carsten at uniqsys.com  Thu Aug 16 08:57:25 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 16 Aug 2007 08:57:25 -0400
Subject: Hijack! Different book: (was: Opinions about this new Python book?
In-Reply-To: <1187263267.314987.253590@a39g2000hsc.googlegroups.com>
References: <mailman.1957.1187093157.22759.python-list@python.org>
	<1187096231.194685.86030@m37g2000prh.googlegroups.com>
	<20070814154913.D8C3C1E400A@bag.python.org>
	<8a6b8e350708141020q495b22der4c362ee3df618d82@mail.gmail.com>
	<mailman.1979.1187113641.22759.python-list@python.org>
	<1187117012.088495.247890@q4g2000prc.googlegroups.com>
	<1187191950.037749.8050@z24g2000prh.googlegroups.com>
	<13c6fb3pntv6n13@corp.supernews.com>
	<1187263267.314987.253590@a39g2000hsc.googlegroups.com>
Message-ID: <1187269045.3385.11.camel@dot.uniqsys.com>

On Thu, 2007-08-16 at 04:21 -0700, Paul Boddie wrote:
> [...] I pity the people writing Python books given
> continuous changes to the language and the associated recommended
> development practices as new features go in, but tracking a target
> prior to any kind of stable release seems a bit too ambitious,
> especially for a book in print.

The book was co-authored by Kevin Dangoor, who is the principal
developer of TurboGears. He probably had a pretty good idea of what the
stable release was going to look like.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From jfabiani at yolo.com  Sun Aug 12 10:59:43 2007
From: jfabiani at yolo.com (johnf)
Date: Sun, 12 Aug 2007 07:59:43 -0700
Subject: Database intensive application
References: <1186895306.237395.189530@z24g2000prh.googlegroups.com>
Message-ID: <YlFvi.6$w33.5@newsfe05.lga>

Rohit wrote:

> I am a novice. I want to know whether Python can be used to develop
> client/server database and web applications like .NET. Which is the
> best book/source to learn Python?


IMO you should use Dabo (www.dabodev.com).  If you want to strike on your
own check using SQLAlchemy as your database connection.  

Check out the O'Reilly books.

John


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug  3 09:08:59 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 03 Aug 2007 15:08:59 +0200
Subject: (no) fast boolean evaluation ? missing  NOT
In-Reply-To: <eb4fb$46b2f7a6$d443bb3a$21643@news.speedlinq.nl>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<mailman.1545.1186095368.22759.python-list@python.org>
	<1186096979.397596.36640@e16g2000pri.googlegroups.com>
	<eb4fb$46b2f7a6$d443bb3a$21643@news.speedlinq.nl>
Message-ID: <46b328ea$0$21525$426a74cc@news.free.fr>

Stef Mientki a ?crit :
(snip)
> Gabriel: you pointed me to this page:
> The exact behavior is defined in the Language Reference 
> <http://docs.python.org/ref/Booleans.html>
> 
> <quote>
> or_test      ::=      and_test | or_test "or" and_test
> </quote
> 
> Can you imagine, while I'm not a programmer, just a human,
> that I don't understand one bit of this line.

This is a variant[2] of the BNF notation[1] for languages grammar. 
You'll find such notation in almost any programming language.

[1] http://en.wikipedia.org/wiki/Backus-Naur_form
[2] http://docs.python.org/ref/notation.html

> So now I'm left with just one question:
> for bitwise operations I should use &, |, ^

yes.

> for boolean operations I should use and, or, xor

yes.

> but after doing some test I find strange effects:
>  >>> A = 4
>  >>> B = 5
>  >>> A and B
> 5
>  >>> A & B
> 4
>  >>> A or B
> 4
>  >>> A | B
> 5


Nothing strange here. You now know how boolean operators works. Bitwise 
operators are something different (while still related). Represent 
yourself ints as bit fields, ie (restricting ourselves to 4-bits words 
for the example):

0 => 0000
1 => 0001
2 => 0010
3 => 0011
4 => 0100
5 => 0101
6 => 0110
7 => 0111
8 => 1000

(etc)

The bitwise operators works this way:

1/ the & operator compares each bit of it's operands, and for each 
returns '1' if both bits are '1', else '0'. So you have:

A & B => 4 & 5 => 0100 & 0101 => 0100 => 4

   0100
& 0101
   ----
   0100

2/ the | operator compares each bit of it's operands, and for each 
returns '1' if one of the bits is '1', else '0'. So you have:

A | B => 4 | 5 => 0100 | 0101 => 0101 => 5

   0100
| 0101
   ----
   0101


HTH


From grahn+nntp at snipabacken.dyndns.org  Sun Aug 12 13:44:48 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 12 Aug 2007 17:44:48 GMT
Subject: Launch file from Python
References: <1186594137.971393.128780@57g2000hsv.googlegroups.com>
Message-ID: <slrnfbuhpa.52s.grahn+nntp@frailea.sa.invalid>

On Wed, 08 Aug 2007 10:28:57 -0700, jocago at gmail.com <jocago at gmail.com> wrote:
> Good afternoon from someone who is trying to learn Python.
>
> I would like to launch an app from within a Python script. From the
> examples I have found, I should be able to do this with os.system.
>
> I use this:
> os.system("xplanet-1.2.0/xplanet.exe -fontsize 24 -label -target earth
> -lat 33.65 -lon -84.42 -radius 40 -num_times 1 -tmpdir .")
> This is copied directly from the .bat file that launches the xplanet
> app. It works there.
>
> and get this:
> 1

That means "error", as others noted.

It is odd that you get no printouts. Had this been on Unix, you'd
either get "file not found" or similar from the shell trying to run
the thing, or something from xplanet itself (only really badly
programs return failure without printing some kind of cause).

Two more comments, assuming you are on Windows (you mention ".bat
files"):

- You use the relative path xplanet-1.2.0/xplanet.exe. That should
  require your program to have the parent of xplanet-1.2.0 as current
  directory. Did the .bat script change directory first?

- It is unusual to use / as a path separator on Windows --
  xplanet-1.2.0\xplanet.exe is more normal. Some parts of Windows
  tolerate both, others do not, IIRC.  But Python itself should not
  care in this case.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From __peter__ at web.de  Fri Aug 24 01:28:58 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 24 Aug 2007 07:28:58 +0200
Subject: List Comprehension Question: One to Many Mapping?
References: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
Message-ID: <falqar$ahe$03$1@news.t-online.com>

beginner wrote:

> How do I map a list to two lists with list comprehension?
> 
> For example, if I have x=[ [1,2], [3,4] ]
> 
> What I want is a new list of list that has four sub-lists:
> 
> [[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]]
> 
> [1,2] is mapped to [1,2] and [f(1), f(2)] and [3,4] is mapped to
> [3,4], [f(3), f(4)].
> 
> I just can't find any way to do that with list comprension. 

>>> [a for b in ((item, map(f, item)) for item in x) for a in b]
[[1, 2], [f(1), f(2)], [3, 4], [f(3), f(4)]]

> I ended up 
> using a loop (untested code based on real code):
> 
> l=[]
> for y in x:
>    l.append(y)
>    l.append([f(z) for z in y])

Using a loop gives you clearer code in this case, so I'd use that.

Peter


From horpner at yahoo.com  Fri Aug 31 08:57:15 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 31 Aug 2007 12:57:15 GMT
Subject: Python doesn't see the directories I create
References: <ldvBi.293202$LE1.92748@newsfe13.lga>
	<46d6856b$0$17674$426a74cc@news.free.fr>
	<slrnfddha0.1o4.horpner@FIAD06.norwich.edu>
	<fb7okk$h7k$3@lust.ihug.co.nz>
Message-ID: <slrnfdg22t.1e8.horpner@FIAD06.norwich.edu>

On 2007-08-31, Lawrence D'Oliveiro
<ldo at geek-central.gen.new_zealand> wrote:
> In message <slrnfddha0.1o4.horpner at FIAD06.norwich.edu>, Neil
> Cerutti wrote:
>> Keeping in mind which came first, isn't it at least as
>> accurate to attribute this problem to Python's choice of
>> escape character?
>
> No, it's Microsoft's fault. The use of backslash as an escape
> character goes back to Unix systems in the early 1970s--long
> before Microsoft came on the scene.
>
> When Microsoft introduced MS-DOS 1.0 in 1981, it didn't have
> directory hierarchies. Commands used the slash character to
> delimit options. Then when MS-DOS 2.0 introduced subdirectories
> in 1983, they decided they couldn't use the slash as the path
> separator, so they used the backslash instead. That has been a
> source of confusion ever since then.

Going back and checking the Python History page, it seems I was
off by four years with when I thought Python was first released
(I was thinking 1995, when the first release was actually 1991).
That makes Python's choice of escape character way more practical
than I thought, since Microsoft hadn't yet conquered the desktop
computing world when Python was in it's infancy.

That strange whirring sound is me backpedaling furiously. Thanks
very much for all your patiences.

-- 
Neil Cerutti
If you throw at someone's head, it's very dangerous, because in the head is
the brain. --Pudge Rodriguez


From jeremy at omba.demon.co.uk  Wed Aug 15 09:33:51 2007
From: jeremy at omba.demon.co.uk (Jeremy C B Nicoll)
Date: Wed, 15 Aug 2007 14:33:51 +0100
Subject: What order does info get returned in by os.listdir()
References: <gemini.jms7ay00fafcf00k8@jernic.by.invalid> 
	<gemini.jmtc5f0021tj002a4@omba.demon.invalid> 
	<5igd1gF3mc1akU1@mid.uni-berlin.de>
Message-ID: <gemini.jmthof006bdd602a4@omba.demon.invalid>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:

> On Wed, 15 Aug 2007 12:34:27 +0100, Jeremy C B Nicoll wrote:
> 
> > I've some supplementary questions... my original code was looking at
> > each leafname in turn via
> > 
> >   for leaf in os.listdir(path):
> >       wholefile = os.path.join(path,leaf)
> >       if os.path.isfile(wholefile):
> >          if leaf.startswith("~"):
> > 
> > etc.  But I now realise I might alternatively do something like:
> > 
> >   leaflist = os.listdir(path)
> >   <then something to sort that list>
> >   for leaf in leaflist:
> 
> But this is doing something different that the above code!?

I'm not sure if I understand you.  I know it's only "equivalent" to the
first line of what's above, ie iterate over a list of names, and obviously
it's got the sorting of that list done, but do you mean there's some other
difference?



> > How would I sort leaflist in a way that mimics the sort order that XP
> > shows me things under?
> 
> This depends on what XP is.  Which program?  Which locale?  How does the
> locale influence that programs sorting?

Well... XP is Windows XP (Pro as I think I said earlier), and I'm in the UK.
I explained earlier how XP shows me stuff in order when I tell it to sort by
name.  

> 
> > Secondly, my code is wasting time looking at subdirectories/files which
> > I already know I'm not interested in.  Is there a way to restrict
> > listdir to, say, only return info about subdirectories, or only about
> > dirs/files whose names match a pattern?
> 
> `os.listdir()` always returns all names.  You can or have to  filter the
> result if you are only interested in some of the names.  Simple pattern
> matching on names can be done with `glob.glob()`.
> 
> > Thirdly, once I've go a list of leafnames, somehow, is there a way to
> > ask Python if a specific leaf-value is in that list, without explicitly
> > looping through the items in the list?
> 
> With the ``in`` operator you have an implicit loop over the list.
> 
>   if 'readme.txt' in leafnames:
>       print 'Hurray!'

OK, that looks useful.  Thanks.

-- 
Jeremy C B Nicoll - my opinions are my own.


From bjourne at gmail.com  Sun Aug  5 07:33:33 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Sun, 5 Aug 2007 11:33:33 +0000
Subject: Best programs written completly in Python
In-Reply-To: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
Message-ID: <740c3aec0708050433x15979d6eq73031c962b0f52c5@mail.gmail.com>

On 8/5/07, Franz Steinh?usler <franz.steinhaeusler at gmx.at> wrote:
> Hello NG,
>
> wWhat are the best programs in your opinion, written entirly
> in pyhton, divided into categories like:
> a) Games
> b) Utilities/System
> c) Office
> d) Web/Newsreader/Mail/Browser

For b; trac: http://trac.edgewall.org/ There actually isn't that many
widespread programs written in Python.

-- 
mvh Bj?rn


From steve at holdenweb.com  Wed Aug  1 07:01:42 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 01 Aug 2007 07:01:42 -0400
Subject: access the name of my method inside it
In-Reply-To: <5hb1ebF3inuf2U6@mid.uni-berlin.de>
References: <1185959202.302467.276080@x35g2000prf.googlegroups.com>
	<5hb1ebF3inuf2U6@mid.uni-berlin.de>
Message-ID: <f8pp6n$cq0$1@sea.gmane.org>

Marc 'BlackJack' Rintsch wrote:
> On Wed, 01 Aug 2007 09:06:42 +0000, james_027 wrote:
> 
>> for example I have this method
>>
>> def my_method():
>>     # do something
>>
>>     # how do I get the name of this method which is my_method here?
> 
> Why do you need this?  There are ways but those are not really good for
> production code.
> 
Maybe he wants to write a recursive method?

Once way is to call self.__calss__.mymethod(self). Ugly, isn't it?

 >>> class p:
...   def mymethod(self, n):
...     if n <= 1:
...       return 1
...     else:
...       return n * self.__class__.mymethod(self, n-1)
...
 >>> pp = p()
 >>> pp.mymethod(10)
3628800
 >>>

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bscrivener42 at gmail.com  Thu Aug 23 00:23:38 2007
From: bscrivener42 at gmail.com (BartlebyScrivener)
Date: Thu, 23 Aug 2007 04:23:38 -0000
Subject: Baby Steps, optionDB
In-Reply-To: <Uk7zi.1531$vU4.979@nlpi068.nbdc.sbc.com>
References: <Uk7zi.1531$vU4.979@nlpi068.nbdc.sbc.com>
Message-ID: <1187843018.391276.303410@z24g2000prh.googlegroups.com>

On Aug 22, 10:41 pm, "W. Watson" <wolf_tra... at invalid.com> wrote:

>     clError: couldn't open "optionDB": no such file or directory

Because the file doesn't exist?

Did you make an optionDB file?

http://tinyurl.com/283o98




From carsten at uniqsys.com  Thu Aug 30 20:58:38 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 30 Aug 2007 20:58:38 -0400
Subject: list index()
In-Reply-To: <1188517370.998114.119940@q4g2000prc.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<87bqcod2gq.fsf@benfinney.id.au>
	<1188517370.998114.119940@q4g2000prc.googlegroups.com>
Message-ID: <1188521918.3258.10.camel@localhost.localdomain>

On Thu, 2007-08-30 at 16:42 -0700, zzbbaadd at aol.com wrote:
> It suddenly dawned on me that what would be best would be a contains()
> (or IN syntax for those who can't afford to wait) for lists.

Either I'm misunderstanding what you mean or you need to get a clue
about what Python can already do before you go around making suggestions
for what Python needs. Lists have supported "in" tests since at least
version 1.5.2:

Python 1.5.2 (#1, Nov  6 1999, 14:53:40) [C] on sco_sv3
Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
>>> if 3 in [1,2,3]: print "Yup, got it!"
... 
Yup, got it!

This feature may be older than version 1.5.2, but this is the oldest
version that I still have running anywhere.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From Kevin.Smith at sas.com  Wed Aug 15 12:39:31 2007
From: Kevin.Smith at sas.com (Kevin D. Smith)
Date: Wed, 15 Aug 2007 10:39:31 -0600
Subject: Move files/directories to Recycle Bin using standard Python libs
Message-ID: <f9va80$ciu$1@foggy.unx.sas.com>

I would like to move files and directories to the Recycle Bin on 
Windows from Python.  I have found some older articles describing how 
to do this, but they require additional packages to be installed.  I'm 
working on a plugin for an existing project and only have the standard 
library to work with.  Is there a way to use the Recycle Bin using 
standard Python?

-- 
Kevin D. Smith



From grante at visi.com  Tue Aug 21 23:33:52 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 22 Aug 2007 03:33:52 -0000
Subject: Chaining programs with pipe
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
	<1187743235.124030.321200@l22g2000prc.googlegroups.com>
Message-ID: <13cnbl0p9qf26e0@corp.supernews.com>

On 2007-08-22, Karthik Gurusamy <kar1107 at gmail.com> wrote:

> Not sure on non-unix platforms, but in unix like platforms it's best
> to reuse shell's power.
>
>>>> import commands
>>>> commands.getoutput('ls | wc')
> '      4       4      24'
>>>>

Executing a shell just because you want a pipe seems like a bit
of overkill.  Doing it the "right" way with subprocess is
pretty trivial.

-- 
Grant Edwards                   grante             Yow!  I was born in a
                                  at               Hostess Cupcake factory
                               visi.com            before the sexual
                                                   revolution!


From jarausch at skynet.be  Sat Aug 11 14:30:54 2007
From: jarausch at skynet.be (Helmut Jarausch)
Date: Sat, 11 Aug 2007 20:30:54 +0200
Subject: decorators - more than just syntactic sugar
Message-ID: <46be005e$0$13866$ba620e4c@news.skynet.be>

Hi,

are decorators more than just syntactic sugar in python 2.x and what
about python 3k ?
How can I find out the predefined decorators?

Many thanks for your help,

Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From __peter__ at web.de  Thu Aug 16 04:12:13 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 16 Aug 2007 10:12:13 +0200
Subject: ploting issues in program
References: <1187250500.571837.196940@19g2000hsx.googlegroups.com>
Message-ID: <fa10su$rf2$02$1@news.t-online.com>

yadin wrote:

> can you please help me to fix these polar plot in db's
> so that the center is at the minimun negative number in voltagedb
> about [-50]
> and the maximun is at zero and how can i see values on the axis like
> showing that the axes start at -50 -40 -30 .....and end at zero

You posted this question several times now and got no response that you
liked enough to abstain from reposting.

Now your options are:

- Try another forum (the matplotlib mailing list would be a good candidate)
- Show some initiative: add 50 to the dB values and be done

>  here is the program

[...]

> voltagedb =  [-48.7906044 ,-11.51244516, -5.58650713, -2.34604603,
> -0.56767793,  0.        ,
>               -0.60034598, -2.41427014,
> -5.7042726 ,-11.75411924,-48.7906044 ,
>               -11.51244516, -5.58650713, -2.34604603, -0.56767793,
> 0.        ,
>               -0.60034598, -2.41427014, -5.7042726 ,-11.75411924,]

voltagedb = [v+50 for v in voltagedb]

> polar(angteta,voltagedb)
> 
> show()

Good luck,
Peter


From samushack at gmail.com  Thu Aug 23 13:39:11 2007
From: samushack at gmail.com (samushack at gmail.com)
Date: Thu, 23 Aug 2007 10:39:11 -0700
Subject: simple spider in python
In-Reply-To: <sll0q4-79t.ln1@lairds.us>
References: <1187876014.845912.236690@e9g2000prf.googlegroups.com>
	<1187879398.007797.128510@i13g2000prf.googlegroups.com>
	<1187880988.813113.20350@l22g2000prc.googlegroups.com>
	<sll0q4-79t.ln1@lairds.us>
Message-ID: <1187890751.871660.275320@z24g2000prh.googlegroups.com>

> Somewhere in the middle between the two suggestions you've already
> received is <URL:http://www.unixreview.com/documents/s=10133/ur0706e/>.

I followed that link, and got an error page...

As to the Google API key issue, I was unaware of that. Very annoying
of them to stop that service. PyGoogle will basically be useless. The
next best thing might be getting an API key for the AJAX API, and
using a browser based implementation...




From ricaraoz at gmail.com  Wed Aug 29 17:44:13 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Wed, 29 Aug 2007 18:44:13 -0300
Subject: copying files
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE30E@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE30C@efmailx>
	<46D5C01B.7080202@bigfoot.com>
	<93066C069973ED448DC2BCEA9C44A7383BE30E@efmailx>
Message-ID: <46D5E8AD.8050505@bigfoot.com>

Brian McCann wrote:
>  
>  
> <mailto:brian.mccann at viziant.net> 
> Hi Ricardo,
> 
> what do the + signs do?
>  

Add the different strings. You had 'm' and 'TEST_HOME' inside a string,
so they would be taken as characters and not variables.

>>> TEST_HOME = "/v01/test_home"
>>> m = "./lib"
>>> "cp -r " + m + " " + TEST_HOME
'cp -r ./lib /v01/test_home'   <----- This is what you want.
>>> "cp -r m TEST_HOME"
'cp -r m TEST_HOME'            <----- This is NOT what you want.

> 
> ________________________________
> 
> From: Ricardo Ar?oz [mailto:ricaraoz at gmail.com]
> Sent: Wed 8/29/2007 2:51 PM
> To: Brian McCann
> Cc: python-list at python.org
> Subject: Re: copying files
> 
> 
> 
> Brian McCann wrote:
>> Hi,
>>
>> with the code below I set a variable TEST_HOME to a path and the
>> variable m to a path
>> in my current dir.
>> I have a symbolic link setting m---->lib
>> when I run the script I get no errors and the lib dir with its 20 files
>> does not get copied to /v01/test_home
>> any help would be greatly appreciated
>>
>> --Brian
>>
>> #!/usr/bin/python
>> import string
>> import os
>> import sys
>> import errno
>> import shutil
>> import tarfile
>>
>> TEST_HOME = "/v01/test_home"
>> m = "./lib"
>> os.system("cp -r m TEST_HOME")
>> #os.system("tar -cvf viziant-ingestion.tar /v01/")
>>
> 
> Sorry, meant : os.system("cp -r " + m + " " + TEST_HOME)
> 
> 
> 
> 



From arkanes at gmail.com  Wed Aug 15 09:31:54 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 15 Aug 2007 08:31:54 -0500
Subject: wxPython before MainLoop
In-Reply-To: <ADBwi.1237$%Y7.624@nlpi069.nbdc.sbc.com>
References: <13bl9a75laqcm70@corp.supernews.com>
	<6a6dnfbbFJNzcCbbnZ2dnUVZ_oudnZ2d@comcast.com>
	<mailman.1843.1186775191.22759.python-list@python.org>
	<ADBwi.1237$%Y7.624@nlpi069.nbdc.sbc.com>
Message-ID: <4866bea60708150631k58deff6coae7a45eb6a950d9a@mail.gmail.com>

On 8/15/07, samwyse <dejanews at email.com> wrote:
> Chris Mellon wrote:
> > On 8/9/07, Heikki Toivonen <heikki at osafoundation.org> wrote:
> >
> >>[david] wrote:
> >>
> >>>I'd like to refresh the display before I start the main loop.
>
> If your window isn't able to interact with the user, then I'd consider
> it a splash screen, no matter if it does look exactly like your main
> application interface.
>
> >>We have this kind of situation in Chandler, where we display and update
> >>the splash screen before we enter MainLoop.
> >>
> [...]
> >>3. The splash screen refresh is basically: draw new stuff,
> >>self.Layout(), self.Update(), wx.Yield()
> >>http://lxr.osafoundation.org/source/chandler/application/Application.py#1421
>
> Looking at the Chandler code suggests a solution to [david]'s original
> problem.  It is possible that, on Windows only, he may need to call
> Update to finish painting the display.
>
> 1432         self.Layout()
> 1433         if wx.Platform == '__WXMSW__':
> 1434             self.Update()
> 1435         wx.GetApp().Yield(True)
>
> > wxYield spins the event loop in place. This can have some serious
> > consequences if you aren't very careful with your usage, like
> > recursively entering event handlers. I generally consider it an
> > experts only interface, and avoid it.
>
> I'll confess to being one of those old-school programmers who, back in
> the day, wrote his code around big select loops instead of using
> threads, but I'm intriged by the "experts only" designation.  Can
> someone explain further?  Thanks!

The biggest problem is recursive events. You can end up entering an
event handler downstack from itself. There's other common problems -
event handlers are generally written to be short and sweet and not to
expect recursion and to complete without interruption. wxYield can
easily end up breaking that. Components that call wxYield are
especially dangerous. For example, some parts of wxWidgets call
wxYield internally. An event handler that aquired a lock was changed
to use one of those components and ended up deadlocking when it was
re-entered by the yield. I've also seen crashes when wxYield processed
a destroy event for a window in the middle of it's own event handler.

Because analyzing your event code to make sure it's reentrant is hard,
and is complicated even more by the fact that wxYield in a component
can cause problems far upstack in a caller, and because there is an
excellent alternative in the form of python generators, I avoid it's
usage from wxPython entirely.


From p.f.moore at gmail.com  Sat Aug 18 12:48:29 2007
From: p.f.moore at gmail.com (Paul Moore)
Date: Sat, 18 Aug 2007 09:48:29 -0700
Subject: Memory leak when creating lots of object
In-Reply-To: <1187322688.545415.122010@i38g2000prf.googlegroups.com>
References: <1187067442.084074.55010@z24g2000prh.googlegroups.com>
	<1187190827.395382.85740@57g2000hsv.googlegroups.com>
	<1187322688.545415.122010@i38g2000prf.googlegroups.com>
Message-ID: <1187455709.206054.16380@a39g2000hsc.googlegroups.com>

On 17 Aug, 04:51, Godzilla <godzillais... at gmail.com> wrote:
> On Aug 16, 1:13 am, Paul  Moore<p.f.mo... at gmail.com> wrote:
> > On 14 Aug, 05:57, Godzilla <godzillais... at gmail.com> wrote:
> > Do you see memory growth with precisely this code? Over what period?
> > How much?
>
> I have it running for more than 1 hour... the main application
> software runs for about 50 days non stops and the memory just keep
> growing...

I'm sorry. Just to be precise, how long would I need to run the code
you posted to see a memory growth?

> What should I do next? Can I force garbage collection manually? If so,
> how do I do that?

As Terry suggested, look at the gc module (gc.collect). But on
inspection, I don't see a memory leak that would be cured by forcing a
collection, which is why I'd like to reproduce the problem before
offering suggestions...

Paul.



From richmoore44 at gmail.com  Thu Aug 16 08:03:41 2007
From: richmoore44 at gmail.com (richmoore44 at gmail.com)
Date: Thu, 16 Aug 2007 12:03:41 -0000
Subject: Layer 2 socket connection
In-Reply-To: <1187202110.958564.206770@l22g2000prc.googlegroups.com>
References: <1187202110.958564.206770@l22g2000prc.googlegroups.com>
Message-ID: <1187265821.989249.276090@r34g2000hsd.googlegroups.com>

On Aug 15, 7:21 pm, alisonken1 <alisonk... at gmail.com> wrote:
> Hello all -
>
> I'm looking at trying to write a python script to connect to a layer 2
> bridge (no IP available).
>
> Looking at the sockets function, it's not clear if I can connect using
> only the mac address - it appears to want either a broadcast address
> or a specific IP address.
>
> Can anyone give me a clue on opening a layer 2 socket in Python?

I use impacket for stuff like that, see http://oss.coresecurity.com/projects/impacket.html

Cheers

Rich.



From bj_666 at gmx.net  Sat Aug 11 15:01:15 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 11 Aug 2007 19:01:15 GMT
Subject: Who told str() to round my int()'s!!!
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
	<5i67roF3ml00gU4@mid.uni-berlin.de>
	<1186852205.973858.284130@r34g2000hsd.googlegroups.com>
Message-ID: <5i6fbrF3ml00gU6@mid.uni-berlin.de>

On Sat, 11 Aug 2007 17:10:05 +0000, Adam W. wrote:

> On Aug 11, 12:53 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> If `str()` would not round you would get very long numbers because of the
>> inaccuracies of floating point values.  I know Python is lying when 0.1
>> prints as 0.1, but do you really want to see
>> 0.10000000000000000555111512312578270211815834045410156250 instead?
> 
> I want str() to convert whatever I give it to a string and do nothing
> else.

But those long numbers are very disturbing and nobody wants them as usual
string representation.  Most programming languages "lie" at this point to
the user so it would be very unexpected too.

> I will worry about long FP values in previous steps.

What do you mean here?  Have you looked at the example above?  That is the
closest you get to 0.1 -- there's no way to round the floating point
value, it can only be done by converting to `str()`.

Ciao,
	Marc 'BlackJack' Rintsch


From vedrandekovic at v-programs.com  Tue Aug  7 08:27:56 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Tue, 07 Aug 2007 05:27:56 -0700
Subject: distutils
Message-ID: <1186489676.042901.236140@w3g2000hsg.googlegroups.com>

Hello again,

Is there any patch for python "distutils", for this

>>> from distutils import log,dir_util
ImportError: cannot import name log


Regards,
Vedran



From kyosohma at gmail.com  Tue Aug 14 14:43:32 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 14 Aug 2007 11:43:32 -0700
Subject: Opinions about this new Python book?
In-Reply-To: <mailman.1979.1187113641.22759.python-list@python.org>
References: <mailman.1957.1187093157.22759.python-list@python.org>
	<1187096231.194685.86030@m37g2000prh.googlegroups.com>
	<20070814154913.D8C3C1E400A@bag.python.org>
	<8a6b8e350708141020q495b22der4c362ee3df618d82@mail.gmail.com>
	<mailman.1979.1187113641.22759.python-list@python.org>
Message-ID: <1187117012.088495.247890@q4g2000prc.googlegroups.com>

On Aug 14, 12:46 pm, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> Yes, please post back to the list. I saw this book on Amazon, but
> there's no table of contents listed, nor is there one on the
> publisher's site.
>
> Thanks,
> Shawn
>
> On 8/14/07, James Matthews <nytrok... at gmail.com> wrote:
>
>
>
> > i got to say that the best python book i bought was Core Python Programming
> > (2nd)  by Wesly Chun! Aside for all the spelling mistakes and syntax errors
> > that there are i feel that the book really explained the language well for
> > someone coming from another programming language!
>
> > On 8/14/07, Dick Moores <r... at rcblue.com> wrote:
> > > At 05:57 AM 8/14/2007, kyoso... at gmail.com wrote:
> > > >On Aug 14, 7:05 am, Dick Moores <r... at rcblue.com> wrote:
> > > > > I'd appreciate opinions about this new Python book.
>
> > > > > Title: Python Power!: The Comprehensive Guide
> > > > > Author:  Matt Telles
> > > > > Publisher:  Course Technology
> > > > > Pub. Date:  Jul 27, 2007
> > > > > Edition:  1st edition
> > > > > Binding:  Paperback
> > > > > Pages:  508
> > > > > ISBN:  1598631586
> > > > > List Price:  34.99 USD
>
> > > > > The book on the publisher's website: <http://tinyurl.com/2dkhzg>
>
> > > > > And at BestBookDeal.com:
> > > > > <http://www.bestbookdeal.com/book/compare/1598631586>
>
> > > > > Thanks,
>
> > > > > Dick Moores
>
> > > >I just got this book over the weekend. I'll start reading/skimming
> > > >through it this week and hopefully remember to get back to you.
>
> > > Thanks!
>
> > > >  By the
> > > >way, why do you want to know?
>
> > > If the experts like it, I'll buy it.
>
> > > Dick
>
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
>
> > --
> >http://www.goldwatches.com/
> >http://www.jewelerslounge.com
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> --
> Please read:http://milocast.com/2007/07/31/this-i-believe/

Here's an abbreviated Table of Contents...just chapter titles. The
book's table of contents also lists section headers.

Chapter 1: About Python
Chapter 2: Python Language Overview
Chapter 3: Tools
Chapter 4: Data Types
Chapter 5: Control Flow
Chapter 6: Input & Output
Chapter 7: Functions & Modules
Chapter 8: Exception Handling
Chapter 9: Object-Oriented Programming
Chapter 10: Classes and Objects in Python
Chapter 11: The Python Library
Chapter 12: The GUI - Tkinter
Chapter 13: The Web Server - Apache
Chapter 14: Working with Databases
Chapter 15: Putting It All Together
Chapter 16: Python and Graphics


Mike



From fdu.xiaojf at gmail.com  Thu Aug 23 03:02:18 2007
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Thu, 23 Aug 2007 15:02:18 +0800
Subject: Are there precompiled python for sgi ?
Message-ID: <46CD30FA.4030201@gmail.com>

Hi,

Are there precompiled python for sgi(IRIX6.5) to download? Several 
packages(_socket, Tkinter, ...) always failed when I tried to build python 
from source on our machine running IRIX6.5.

Thanks!


From andre.roberge at gmail.com  Thu Aug  2 10:14:58 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: Thu, 02 Aug 2007 14:14:58 -0000
Subject: Determining if file is valid image file
Message-ID: <1186064098.587590.91210@g4g2000hsf.googlegroups.com>

Other than installing PIL, is there a "simple" way using Python only
to determine if a file is a valid image file?

I'd be happy if I could at least identify valid images files for gif,
jpeg and png.   Pointers to existing modules or examples would be
appreciated.

The reason why I'd prefer not using PIL is that I'd like to bundle
such a function/module in my app.

Andr?



From JYOUNG79 at kc.rr.com  Fri Aug  3 20:48:56 2007
From: JYOUNG79 at kc.rr.com (JYOUNG79 at kc.rr.com)
Date: Fri, 03 Aug 2007 19:48:56 -0500
Subject: xlrd question
Message-ID: <c573caf034cbe.34cbec573caf0@rdc-kc.rr.com>

Hi John,

Thanks very much for your reply.  And thanks for taking the time to create xlrd...  this is a 
very cool and 
impressive program!!  :-)

I ran your code which gave me this:

>>> import sys, xlrd; print sys.version; print xlrd.__file__
2.3.5 (#1, Jan 30 2006, 13:30:29) 
[GCC 3.3 20030304 (Apple Computer, Inc. build 1819)]
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/
xlrd/__init__.pyc

and as far as I can tell, the runxlrd.py file is located here (where I had drug this folder 
originally):

Macintosh HD/xlrd-0.6.1/scripts/runxlrd.py

So if I'm understanding this correctly, xlrd only uses the folder you download (xlrd-0.6.1) 
and then moves the 
'__init__.pyc' file to the location mentioned above?  I apologize if I don't sound very intelligent 
with this - I'm 
completely new to Python.

There's definitely no problems or concerns.  :-)    I'm doing a bit of research to see if this 
might be something I 
use down the road at work.  Our I/T department is extremely strict as to what we put on 
employees machines 
so I want to have a good understanding as to where files are installed so I can let i/T know all 
the details.  One 
department in particular that I support uses a lot of Excel macros that I wrote quite awhile 
back.  Unfortunately, 
I've heard that Microsoft is planning on taking VBA out of the next version of Excel on the 
Mac platform.  I don't 
mind converting everything over to AppleScript but  I'm researching other alternatives.  I just 
installed xlrd on 
my home machine last night and was really impressed with the few things I was able to figure 
out.

While I'm talking about Excel, is there any other program (for Python) that can edit Excel 
files?  Will xlrd ever get 
this capability (I believe someone mentioned xlwr on another post)?

Thanks again for replying to my post and thank you very much for sharing your awesome 
program!  :-)

Jay


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Aug 27 07:51:36 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 27 Aug 2007 13:51:36 +0200
Subject: beginner, idomatic python 2
In-Reply-To: <13d4jfjfogbvq6f@corp.supernews.com>
References: <13csjmeaoqh9le3@corp.supernews.com>
	<1187927388.173203.298660@e9g2000prf.googlegroups.com>
	<13d4jfjfogbvq6f@corp.supernews.com>
Message-ID: <46d2ba7a$0$430$426a74cc@news.free.fr>

bambam a ?crit :

<OT>Steve, could you please stop top-posting ?-) TIA </OT>

> "Dan Bishop" <danb_83 at yahoo.com> wrote in message 
> news:1187927388.173203.298660 at e9g2000prf.googlegroups.com...
>> On Aug 23, 10:21 pm, "bambam" <da... at asdf.asdf> wrote:
>>> Would someone like to suggest a replacement for this? This is a
>>> function that returns different kinds of similar objects, depending
>>> on what is asked for. PSP and PWR are classes.  I don't really
>>> want to re-write the calling code very much: I'm just wondering
>>> if the function can be replaced with some kind of OOP pattern.
>>>
>>> def Device(DeviceType):
>>>     if DeviceType=='PSP':
>>>         return PSP()
>>>     elif DeviceType=="Power Supply"
>>>         return PWR()
>>>     etc...
>>>
>>> Thanks!
>> Typically, you'd use a dictionary:
>>
>> DEVICE_DICT = {
>>    'PSP': PSP.
>>    'Power Supply': PWR,
>>    # etc.
>> }
>>
>> and your function would simply return DEVICE_DICT[device_type]()
>>
> Thank you. I didn't reply earlier because I was trying to get my
> head around what you wrote, which was strange and foreign
> to me.
> 
> It seems to me that the dictionary object you suggested is a
> direct replacement for the function code,

Almost, yes !-)

> only more efficient
> because the case table is internalised with a hash table, and
> the original if/elif/else case table was unlikely to be implemented
> as a hash table.
> 
> And presumably, it is idiomatic

It is. Dicts are probably the central data structure in Python, and are 
highly optimised. You'll find quite a lot of dict-based dispatch in 
Python code.

> because Python programmers
> expect to use dictionaries for their lookup tables.

Indeed - that's what dictionnaries are for.

> You have answered a question I didn't know enough to ask :~)
> --which is why I started with the general question, so I don't
> feel too stupid about that --.
> 
> And now I wonder about the 'other' question. Should I consider
> dynamically overriding the methods in my 'Device' class, instead
> of creating separate classes for the Psp and Pwr devices?
> I could create an object of the base Device class, and at init
> I could make sure the methods were connected for a Psp or
> a Pwr device. When (if ever) is that a good idea?

While it's technically possible, I wouldn't advise such a design (which 
looks pretty close to the Prototype pattern) unless you need to have 
something *highly* extensible and customisable (and even then, there are 
other - possibly better - ways, depending on the context). If the Device 
taxonomy is stable and well defined, you're certainly 
DoingTheSimplestThing (here, a dict-based dispatch encapsulated in a 
factory function...).

As a side note, in Python, inheritance is mostly an implementation 
detail, and should usually not be used for typing.

My 2 cents...


From steve at holdenweb.com  Sat Aug 11 10:19:29 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 11 Aug 2007 10:19:29 -0400
Subject: LRU cache?
In-Reply-To: <f9kdd3$cir$1@newsreader2.netcologne.de>
References: <7x8x8ixomj.fsf_-_@ruckus.brouhaha.com>
	<f9kdd3$cir$1@newsreader2.netcologne.de>
Message-ID: <f9kghh$u6o$1@sea.gmane.org>

Thomas Wittek wrote:
> Paul Rubin schrieb:
>> Anyone got a favorite LRU cache implementation?  I see a few in google
>> but none look all that good.  I just want a dictionary indexed by
>> strings, that remembers the last few thousand entries I put in it.
> 
> I don't know a module for that (although it might exist), but I could
> imagine how to implement it.
> 
> Generally a LRU cache could be implemented as a (linked) list with a
> max. size of N.
> On usage of an object this object will be moved to the top of the list
> (and removed from the old position).
> If it's not yet stored in the cache, you (fetch it from the source and)
> add it on top and remove the last one, if the list exceeds N entries.
> 
> So you need to do two things:
> 1) Maintain a list: Use a (linked) list.
> 2) Random access to that list: Use a dict (hash), that also has to be
> updated on removal/addition of objects.
> 
Paul's an old enough hand that he's well able to determine this for 
himself. He's also polite enough not to reply along those lines :-)

*I* don't know of module for tracking how plants grow, but I could 
imagine how to implement it ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From paul at boddie.org.uk  Fri Aug  3 10:51:17 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Fri, 03 Aug 2007 07:51:17 -0700
Subject: (no) fast boolean evaluation ? missing NOT
In-Reply-To: <eb4fb$46b2f7a6$d443bb3a$21643@news.speedlinq.nl>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<mailman.1545.1186095368.22759.python-list@python.org>
	<1186096979.397596.36640@e16g2000pri.googlegroups.com>
	<eb4fb$46b2f7a6$d443bb3a$21643@news.speedlinq.nl>
Message-ID: <1186152677.730158.111420@w3g2000hsg.googlegroups.com>

On 3 Aug, 11:45, Stef Mientki <S.Mientki-nos... at mailbox.kun.nl> wrote:
>
> Sorry, my question missed the essential "NOT",
> here is an example, that behaves different in Delphi,
> (so I guess Delphi is not a real language ;-)

Delphi is based on Pascal, and from what I can recall from my
university textbook, there isn't any mandatory short-circuit
evaluation in Pascal: it's an implementation-dependent feature.
Consequently, an expression involving boolean operators in such
languages may well evaluate each term (potentially causing side-
effects) before determining the final result.

Paul



From semanticist at gmail.com  Fri Aug 31 10:42:49 2007
From: semanticist at gmail.com (Miles)
Date: Fri, 31 Aug 2007 10:42:49 -0400
Subject: fcntl problems
In-Reply-To: <1188568022.988154.188230@y42g2000hsy.googlegroups.com>
References: <1188512377.441241.107900@q4g2000prc.googlegroups.com>
	<1188515889.352267.220790@q5g2000prf.googlegroups.com>
	<mailman.186.1188541398.28954.python-list@python.org>
	<1188568022.988154.188230@y42g2000hsy.googlegroups.com>
Message-ID: <a49e45f50708310742i2b40d5cfm331c6a81f457213e@mail.gmail.com>

On 8/31/07, mhearne808 wrote:
> I have a script that will be run from a cron job once a minute.  One
> of the things this script will do is open a file to stash some
> temporary results.  I expect that this script will always finish its
> work in less than 15 seconds, but I didn't want to depend on that.
> Thus I started to look into file locking, which I had hoped I could
> use in the following fashion:
>
> Process A opens file foo
> Process A locks file foo
> Process A takes more than a minute to do its work
> Process B wakes up
> Process B determines that file foo is locked
> Process B quits in disgust
> Process A finishes its work

That would look like (untested):

import fcntl, sys
f = open('foo', 'w+')
try:
    fcntl.flock(f.fileno(), fcntl.LOCK_EX | fcntl.LOCK_NB)
except IOError, e:
    if e.args[0] == 35:
        sys.exit(1)
    else:
        raise
f.seek(0, 2) # seek to end
# do your thing with the file
f.flush()
fcntl.flock(f.fileno(), fcntl.LOCK_UN)
f.close()

-Miles


From robert.rawlins at thinkbluemedia.co.uk  Fri Aug  3 04:23:53 2007
From: robert.rawlins at thinkbluemedia.co.uk (Robert Rawlins - Think Blue)
Date: Fri, 3 Aug 2007 09:23:53 +0100
Subject: File Handling & TRY/EXCEPT
Message-ID: <00af01c7d5a7$a12723a0$e3756ae0$@rawlins@thinkbluemedia.co.uk>

Hello Guys,

 

I'm looking for some advice on how best to handle file read/write errors
with try/except as i'm a little vague on this, I have a small memory leak in
my app and I'm starting to think its generated by my log file write. For an
example of the function look below.

 

       def addAppLog(self, event):

              try:

                     logfile = open('/pblue/new/Logs/Application.csv','a')

 

                     now = datetime.datetime.now()

 

                     logstring = '%s,%s \n' % (event, str(now))

 

                     logfile.write(logstring)

              except:

                     self.addAppLog(event)

              else:

                     logfile.close()

 

Now I'm looking for some help to sort this out as I'm sure it's pretty
untidy, I want to make it as air tight as possible. The basic concept was
that if it tries writing to the log file and it fails, then it needs to
reattempt it, right?

 

What's the best way to handle this to ensure that there are not any memory
leaks caused when the file is open() but not followed by a close(). I'm
running 2.4 and I know some of these newer versions don't need you to
explicitly close() the file objects, but I would certainly feel a lot
better.

 

Any advice?

 

Thanks guys,

 

Rob

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From roger.miller at nova-sol.com  Thu Aug 16 16:49:09 2007
From: roger.miller at nova-sol.com (Roger Miller)
Date: Thu, 16 Aug 2007 13:49:09 -0700
Subject: A problem with Time
In-Reply-To: <1187293581.631314.243650@a39g2000hsc.googlegroups.com>
References: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
	<1187293581.631314.243650@a39g2000hsc.googlegroups.com>
Message-ID: <1187297349.471976.318460@x40g2000prg.googlegroups.com>

On Aug 16, 9:46 am, MRAB <goo... at mrabarnett.plus.com> wrote:
>
> As well as the other replies, this also works (as far as I can tell!):
>
> import time
> today = time.localtime()
> yesterday = today[ : 2] + (today[2] - 1, ) + today[3 : ]
> yesterday = time.localtime(time.mktime(yesterday))

This is something I have wondered about.  The C library mktime
function is
documented to fix up out of range values,.  For example July 32
becomes
August 1 and August -1 becomes July 31.  Python presumably inherits
this
very useful (and seemingly not well known) behavior, but it is not
documented.  Is this just an oversight, or is it intentional on the
grounds
that it might be platform-dependent?  Any language lawyers out there
that
would care to comment?



From martin at v.loewis.de  Thu Aug  9 03:00:12 2007
From: martin at v.loewis.de (=?ISO-8859-2?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 09 Aug 2007 09:00:12 +0200
Subject: tokenize module after installation
In-Reply-To: <1186599829.900252.127640@g4g2000hsf.googlegroups.com>
References: <1186599829.900252.127640@g4g2000hsf.googlegroups.com>
Message-ID: <46babb7c$0$2914$9b622d9e@news.freenet.de>

> After installation my program that uses tokenize module,when I run
> myprogram.exe (vgsveki.exe):
> 
> AttributeError: 'module' object has no attribute 'untokenize'

Perhaps you use the 2.4 version of tokenize.py here, which did
not have untokenize.

Regards,
Martin


From martin.marcher at gmail.com  Thu Aug 30 01:10:47 2007
From: martin.marcher at gmail.com (Martin Marcher)
Date: Thu, 30 Aug 2007 07:10:47 +0200
Subject: We need PIGs :)
Message-ID: <db90db6e0708292210k62b81fcal93f46c126b6ab3b@mail.gmail.com>

Hello,

having worked quite a bit with python in the last months (some Java
before, and some C++ before that) I was very impressed by an idea the
Java people had.

Explanation: the JSRs define how to implement certain services and or
features in Java so that they can be reused. I haven't found such a
thing for python yet.

Say I have the problem of authentication. Now I can implement
authentication against a text file with a "key : value" format.

However someone may find it more suitable to implement a
authentication backend for exactly this app that can use postgres.

Who else can use the authentication for my program created by a third
party in his or her own app/package/module? To my knowledge noone as
there's nothing you could at least theoretically keep to.

My idea was to define "Python Implementation Guidelines" (PIGs) that
specify a problem formalize it enough so that implementations are
interchangeable (in this example create a module that has an
"authenticate(username, password)" method so that one could easily
take that module for any given app and then authenticate against
postgres, and also against my plaintext file (which was the original -
quite useless - implementation).

Does that sound like a good idea or would that be over formalization?

Personally I think that would be great as I could search the PIGs at
(hopefully) python.org find out the number and search at koders.com or
code.google.com for python code that has "PIG: XXX" in the metadata
docstring or wherever - maybe even a __pig__ = XXX variable.

any input is welcome (also point me to the place where that can be
found if it already exists)
martin


From gagsl-py2 at yahoo.com.ar  Thu Aug  2 18:52:07 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 02 Aug 2007 19:52:07 -0300
Subject: (no) fast boolean evaluation ?
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
Message-ID: <op.twge45lfx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 02 Aug 2007 18:47:49 -0300, Stef Mientki  
<S.Mientki-nospam at mailbox.kun.nl> escribi?:

> I discovered that boolean evaluation in Python is done "fast"
> (as soon as the condition is ok, the rest of the expression is ignored).
>
> Is this standard behavior or is there a compiler switch to turn it  
> on/off ?

The exact behavior is defined in the Language Reference  
<http://docs.python.org/ref/Booleans.html>

"The expression x and y first evaluates x; if x is false, its value is  
returned; otherwise, y is evaluated and the resulting value is returned.
The expression x or y first evaluates x; if x is true, its value is  
returned; otherwise, y is evaluated and the resulting value is returned.
Note that neither and nor or restrict the value and type they return to  
False and True, but rather return the last evaluated argument. This is  
sometimes useful, e.g., if s is a string that should be replaced by a  
default value if it is empty, the expression s or 'foo' yields the desired  
value."

Tutorial section 5.7 say the same thing in a colloquial way.

-- 
Gabriel Genellina



From daniels at dsl-only.net  Tue Aug 28 00:14:59 2007
From: daniels at dsl-only.net (Scott David Daniels)
Date: Mon, 27 Aug 2007 21:14:59 -0700
Subject: "Try:" which only encompasses head of compound statement
In-Reply-To: <87wsvgfszm.fsf@benfinney.id.au>
References: <1188250535.607963.42540@22g2000hsm.googlegroups.com>
	<87wsvgfszm.fsf@benfinney.id.au>
Message-ID: <13d7898odj2g19b@corp.supernews.com>

Ben Finney wrote:
> Jameson.Quinn at gmail.com writes:
> ... try to only catch exceptions from the
> minimum amount of code that does one discrete action.
> 
>     try:
>         input_file = open(my_filename)
>     except IOError, exc:
>         print "Can't open myfile: %(exc)" % locals()
> 
>     for line in input_file:
>         count += open_and_process_subfile(line)
Actually, this will be followed by some foolishness because
(1) print "Can't open myfile: %(exc)" % locals()
     Should at least be:
         print "Can't open myfile: %(exc)s" % locals()
     But more reasonably:
         print "Can't open myfile: %s" % exc
and
(2) Even if the print succeeds, the code will fall through into the loop 
and you'll (if you are lucky) get a complaint about
     NameError: name 'input_file' is not defined
You'd need to "raise" after the print, but the normal IOError failure
to open message already includes the name of the file it tried to get
to in an attribute "filename", so just catch it outside this code (as
others have already suggested).

-Scott David Daniels
Scott.Daniels at Acm.Org


From wahab-mail at gmx.net  Fri Aug 24 09:07:56 2007
From: wahab-mail at gmx.net (Mirco Wahab)
Date: Fri, 24 Aug 2007 15:07:56 +0200
Subject: Regular expression use
In-Reply-To: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
Message-ID: <famlj0$33k$1@mlucom4.urz.uni-halle.de>

Nick Maclaren wrote:
> For reasons that I won't explain, as they are too complicated
> and not terribly relevant, I am interested in discovering what
> people actually use regular expressions for.  Not the subject
> domain, but the construction of the regular expressions.

After I figured out how to solve a problem,
I'll surely rewrite the solution again in
pure Perl5 regular expressions in order to
outrun the normal mental degradation processes
related to aging ... :)

> I know about computer scientists and parsing, and I know about
> the use of relatively simple ones for things like extracting
> HTML links from Web pages.  But I don't have much feel for the
> (probably rare but difficult) uses of more complex ones for

Using complex regular expressions is like tank destruction
with contact charges glued on them. Only a few people
will even survive the first "usage", but survivors will
then eventually be able to destroy almost every tank with
tremendous speed and precision.

> other purposes. I have heard of several such uses, but don't
> have an overall idea of what is going on.

On business software projects, maintainability is a key
prerequisite - after using complex regular expressions
on business critical parts you are bound to involve
very very expensive maintenance programmers ... :)

What exactly did you "hear" of several "uses"? Which
application? Academia, Business, ...?


Regards

M.


From steve at holdenweb.com  Fri Aug 24 07:42:12 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 24 Aug 2007 07:42:12 -0400
Subject: Does shuffle() produce uniform result ?
In-Reply-To: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
Message-ID: <famg6r$c47$1@sea.gmane.org>

tooru honda wrote:
> Hi,
> 
> I have read the source code of the built-in random module, random.py.  
> After also reading Wiki article on Knuth Shuffle algorithm, I wonder if 
> the shuffle method implemented in random.py produces results with modulo 
> bias.
> 
> The reasoning is as follows: Because the method random() only produces 
> finitely many possible results, we get modulo bias when the number of 
> possible results is not divisible by the size of the shuffled list.
> 
> 1. Does shuffle() produce uniform result ?
> 
Given the cycle length of the Mersenne twister algorithm that generates 
the underlying random numbers, it would have to be a pretty long list to 
see a significant bias, don't you think? Have you done any calculations 
on the length of list you propose to use?

> 2. If not, is there a fast and uniform shuffle() available somewhere ?
> 
Frankly I don't think you need to worry.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From neptundancer at gmail.com  Sun Aug 26 15:17:39 2007
From: neptundancer at gmail.com (neptundancer at gmail.com)
Date: Sun, 26 Aug 2007 19:17:39 -0000
Subject: lisper learning python,
	... could you please comment my first python program?
In-Reply-To: <1188150028.716338.64390@57g2000hsv.googlegroups.com>
References: <1188143768.742884.38520@r29g2000hsg.googlegroups.com>
	<1188150028.716338.64390@57g2000hsv.googlegroups.com>
Message-ID: <1188155859.366489.142760@r34g2000hsd.googlegroups.com>

On Aug 26, 7:40 pm, Michele Simionato <michele.simion... at gmail.com>
wrote:
> On Aug 26, 5:56 pm, neptundan... at gmail.com wrote:
>
> > Hi,
> >   to extend my skills, I am learning python. I have written small
> > program which computes math expression like "1+2*sin(y^10)/cos(x*y)"
> > and similar, so far only + - * / ^ sin con tan sqrt are supported. But
> > my program is quite inextensible, I have to change the code to add new
> > functions... Could some fellow experienced pythonista give me some
> > tips how to make my program shorter, and more extensible?
>
> I understand that you are doing this as a learning exercise. Still, I
> would
> recommend you to have a look at the shlex module in the standard
> library
> and to pyparsing. Looking at their source code should should give you
> some
> idea. BTW, since you are familiar with Lisp, I would recommend you
> IPython
> for a better interactive experience.
>
>   Michele Simionato

thanks for the tip! Now I have IPython working nicely. The shell now
looks a little like Christmas tree but I think it can be reduced a
bit ;)
the ?var and auto completion is exactly what I was looking for!

Nep



From sjmachin at lexicon.net  Sat Aug 11 17:34:43 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 11 Aug 2007 14:34:43 -0700
Subject: Who told str() to round my int()'s!!!
In-Reply-To: <1186861056.323621.195570@e9g2000prf.googlegroups.com>
References: <1186850402.192126.299840@w3g2000hsg.googlegroups.com>
	<1186861056.323621.195570@e9g2000prf.googlegroups.com>
Message-ID: <1186868083.252032.187280@m37g2000prh.googlegroups.com>

On Aug 12, 5:37 am, Zentrader <zentrad... at gmail.com> wrote:
> On Aug 11, 9:40 am, "Adam W." <AWasile... at gmail.com> wrote:
>
> > After a fair amount of troubleshooting of why my lists were coming
> > back a handful of digits short, and the last digit rounded off, I
> > determined the str() function was to blame:
>
> > >>> foonum
>
> > 0.0071299720384678782
>
> > >>> str(foonum)
> > '0.00712997203847'
>
> > Why in the world does str() have any business rounding my numbers, and
> > how do I get around this?
>
> If 15 digit precision is a concern, I would suggest that you us the
> decimal class instead of floating points.  Floating point problems on
> X86 machines are well documented.http://docs.python.org/lib/module-decimal.htmlhttp://pydoc.org/2.4.1/decimal.htmlhttp://gmpy.sourceforge.net/

If you are concerned with precision of *communication*:

The problem is not with floating "points" in general; floating point
arithmetic can be done using a decimal representation for the numbers.
The problem is not with "X86" machines in particular; just about all
modern machines have floating point hardware which implements the IEEE
754 standard for binary flaoting point arithmetic. The problem is with
trying to represent in one base (e.g. 10) a non-integer number that is
expressed in a different base (e.g. 2) -- where the number can be
represented exactly only in one base (e.g. 1./10.) or in neither (e.g.
1./3.)



From almadhu at gmail.com  Wed Aug  8 00:35:26 2007
From: almadhu at gmail.com (Madhu Alagu)
Date: Wed, 08 Aug 2007 04:35:26 -0000
Subject: Web based Reporting tool for Python
In-Reply-To: <mailman.1722.1186522221.22759.python-list@python.org>
References: <1186460956.945148.162610@k79g2000hse.googlegroups.com>
	<mailman.1722.1186522221.22759.python-list@python.org>
Message-ID: <1186547726.383996.291360@d55g2000hsg.googlegroups.com>

Thanking so much for all the informations and links.I would like to
use Mako Templates(www.makotemplates.org).I like to use simple and
python default module...





Thanks


Madhu Alagu


On Aug 8, 12:29 am, Jay Loden <pyt... at jayloden.com> wrote:
> Madhu Alagu wrote:
> > I am looking template based report tools for python.It has the ability
> > to deliver rich content onto the screen, to the printer or into PDF,
> > HTML, XLS, CSV and XML files.
>
> As others have mentioned, I don't believe that all of the above is implemented
> in a single package. However, Python can most definitely deal with all of the
> above formats.
>
> For HTML templating I can highly recommend Clearsilver:http://www.clearsilver.net/it's written in C with Python (and other language)
> wrappers, is very fast and is also extensible.
>
> For PDF:
> ReportLab -http://www.reportlab.org/downloads.html
>           -http://www.ibm.com/developerworks/linux/library/l-sc6.html?loc=dwmain
>
> For XSLT:
> 4Suite, libxml -http://uche.ogbuji.net/tech/akara/nodes/2003-01-01/python-xslt
>
> For CSV and XML:
> csv module, libxml, lxml, ElemenTree modules
>
> -Jay




From martin at v.loewis.de  Wed Aug  1 01:20:18 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 01 Aug 2007 07:20:18 +0200
Subject: Python end of file marker similar to perl's __END__
In-Reply-To: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
Message-ID: <46b01812$0$16618$9b622d9e@news.freenet.de>

> In perl, I can write __END__ in a file and the perl interpreter will
> ignore everything below that line. This is very handy when testing my
> program. Does python have something similar?

Sorry, no, it doesn't.

Regards,
Martin


From gagsl-py2 at yahoo.com.ar  Fri Aug 24 16:42:23 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 24 Aug 2007 17:42:23 -0300
Subject: Clipboard Monitor (tkinter,windows)
References: <797532.82583.qm@web27210.mail.ukl.yahoo.com>
Message-ID: <op.txkzsxbqx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 24 Aug 2007 06:35:05 -0300, Peter Sutton  
<annannienann at yahoo.co.uk> escribi?:

> Hi. I am an A-level student studying computer science. I have taken it  
> upon myself to learn python. It is now my weapon of choice. I have had a  
> problem trying to creating a clipboard monitor in Windows(XP,Vista) that  
> is linked to a tkinter GUI. I have a perfectly good code for clipboard  
> monitoring, but as soon as it is linked to a tkinter gui, the gui locks  
> when a WM.DRAWCLIPBOARD message is recieved. I am at the point of giving  
> up. If anyone can help or offer an alternative...that is not  
> polling....I would be very happy.  Thanks. Peter

Removing this line:
	 self.l["text"] = "Lord be Praised"
and it works fine.
I'm not a Tk expert but I think it doesn't like sending another message  
 from inside a message handler.

I'd try to decouple both actions; inside OnDrawClipboard just save the  
clipboard contents in an instance attribute, and then invalidate the  
window; show the contents on response to wm_paint messages.

-- 
Gabriel Genellina



From alisonken1 at gmail.com  Wed Aug 15 14:21:50 2007
From: alisonken1 at gmail.com (alisonken1)
Date: Wed, 15 Aug 2007 18:21:50 -0000
Subject: Layer 2 socket connection
Message-ID: <1187202110.958564.206770@l22g2000prc.googlegroups.com>

Hello all -

I'm looking at trying to write a python script to connect to a layer 2
bridge (no IP available).

Looking at the sockets function, it's not clear if I can connect using
only the mac address - it appears to want either a broadcast address
or a specific IP address.

Can anyone give me a clue on opening a layer 2 socket in Python?



From pyth0nc0d3r at gmail.com  Fri Aug 24 11:16:12 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Fri, 24 Aug 2007 10:16:12 -0500
Subject: I can't get value of entry box, Tinker
Message-ID: <eb79828c0708240816o182b1e75o67fc9b27b6475051@mail.gmail.com>

I tried w/ my following code:

from Tkinter import *

master = Tk()
Label(master, text="Username").grid(row=0, sticky=W)
Label(master, text="Password").grid(row=1, sticky=W)
e1 = Entry(master)
e2 = Entry(master,show="*")
def login():
    global e2,e1
    print e2
    print e1
e3 = Button(master,text="Login",command=login).grid(row=3, sticky=W+E+S+N)
e1.grid(row=0, column=1)
e2.grid(row=1, column=1)
master.mainloop()


it outputted something like:
.11972160
.11972080

What/should I, can I do?
-------------- next part --------------
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From fonnesbeck at gmail.com  Sun Aug 12 16:49:33 2007
From: fonnesbeck at gmail.com (Chris)
Date: Sun, 12 Aug 2007 20:49:33 +0000 (UTC)
Subject: Python not freeing memory (?)
Message-ID: <loom.20070812T224243-317@post.gmane.org>

I have a Bayesian simulation package that keeps running into memory 
allocation problems. I have a feeling this has something to do with 
Python (2.5.1.1) not freeing memory. The program essentially 
iterates n times, each time proposing new arrays (numpy) of values 
that are evaluated using statistical likelihoods. All variables in 
the loop are re-assigned at each iteration, so there should not be 
a leak. Nevertheless, at approximately the same iteration every 
time, I run into malloc errors:

Iteration 36200 at 5647.58165097

Iteration 36300 at 5664.8412981

Iteration 36400 at 5681.71009493
Python(28344,0xa000d000) malloc: *** vm_allocate(size=8421376) 
failed (error code=3)
Python(28344,0xa000d000) malloc: *** error: can't allocate region
Python(28344,0xa000d000) malloc: *** set a breakpoint in szone_error 
to debug
Traceback (most recent call last):
  File "/Users/chris/EURING/detection/detection2.py", line 285, 
in <module>
    run()
  File "/Users/chris/EURING/detection/detection2.py", line 268, in run
    results = sampler.sample(iterations=iterations, burn=burn, thin=thin)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-
packages/PyMC/MCMC.py", line 3021, in sample
    parameter.propose(debug)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-
packages/PyMC/MCMC.py", line 768, in propose
    if not self._sampler.test():
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-
packages/PyMC/MCMC.py", line 2899, in test
    self()
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-
packages/PyMC/MCMC.py", line 2562, in __call__
    return self.model()
  File "/Users/chris/EURING/detection/detection2.py", line 238, in model
    self.pd = invlogit(self.beta0 + self.beta1 * self.wind + self.beta2 * (self.cloud>0) + beta3[self.series-
1])
MemoryError

Is there *any* way of getting around this?



From duprez at hinet.net.au  Fri Aug 24 03:03:05 2007
From: duprez at hinet.net.au (Mick Duprez)
Date: Fri, 24 Aug 2007 00:03:05 -0700
Subject: Error with Simplemapi.py
Message-ID: <1187938985.165186.300780@i38g2000prf.googlegroups.com>

On Dec 24 2004, 4:56 pm, i... at kirbyfooty.com wrote:
> I wish I new why google doesn't show nicely aligned python code when
> you paste the script.
> Anyways, in case this helps someone else you can download the script
> fromhttp://www.kirbyfooty.com/simplemapi.py
>
> Ian

First of all, thanks to all involved, this looks like what I need
without re-inventing the wheel.
Sorry to Ian if he just recieved 2 emails, my bad, I need to learn how
to use this board better!

I have a small problem. I get an error I don't know how to resolve,
any help would be much appreciated.
I'm using Python25 on winXP pro and the script from the link above.
Here's the error -

>>> mailtest.SendMail('noone at somewhere.net','test','test string','c:\dbs.txt')

Traceback (most recent call last):
  File "<pyshell#10>", line 1, in <module>
    mailtest.SendMail('noone at somewhere.net','test','test string','c:
\dbs.txt')
  File "C:\Python25\mailtest.py", line 135, in SendMail
    cast(NULL, lpMapiRecipDesc), RecipCnt, recip,
  File "C:\Python25\lib\ctypes\__init__.py", line 478, in cast
    return _cast(obj, obj, typ)
ArgumentError: argument 1: <type 'exceptions.TypeError'>: wrong type
>>>

I have had a brief look at the C api for these structs and functions
but I can't resolve it, it is probably something simple.
The piece of code I don't understand though is this -

MapiRecipDesc_A = MapiRecipDesc * len(RecipWork) #size of struct??
rda = MapiRecipDesc_A() # isn't it MapiRecipDesc as declared??

There's some new stuff going on here I don't understand.

thanks for your help,
Mick.



From siona at chiark.greenend.org.uk  Tue Aug  7 09:41:23 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 07 Aug 2007 14:41:23 +0100 (BST)
Subject: is it possible to improve traceback messages ?
References: <46B75F9E.5020309@mailbox.kun.nl>
	<mailman.1686.1186422892.22759.python-list@python.org>
	<1186429711.511166.140780@i38g2000prf.googlegroups.com>
Message-ID: <3mp*G2HRr@news.chiark.greenend.org.uk>

Zentrader  <zentraders at gmail.com> wrote:
>This is the "standard" way AFAIK
>.try :
>.   some_process
>.except :
>.   import trackback, sys
>.   et, ev, tb = sys.exc_info()
>.   while tb :
>.        co = tb.tb_frame.f_code
>.        print "Filename = " + str(co.co_filename)
>.        print  "Error Line # = " + str(traceback.tb_lineno(tb))
>.        tb = tb.tb_next
>.   print "error type = ", et
>.   print "error var name  = ", ev

Personally, I find:

try:
    some_process
except:
    import traceback
    traceback.print_exc()
    raise

just as informative and much easier to write.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
   "Frankly I have no feelings towards penguins one way or the other"
        -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From BerndWill at googlemail.com  Thu Aug 23 05:11:46 2007
From: BerndWill at googlemail.com (OpenPavilion)
Date: Thu, 23 Aug 2007 09:11:46 -0000
Subject: Question: wxpython and 3d engine example with model load ?
Message-ID: <1187860306.533382.248430@j4g2000prf.googlegroups.com>

Hello,

did anyone succeed in combining wxpython and a 3d engine (pyogre,
crystalblend, panda3d, soya etc.) ?

I would like to create an application, which uses wxpython tree, menu
and grid elements and embedds a 3d view of some of the listed objects
in an own detail window, so showing the object as a 3d model.
I know there is PyOpenGL as well, but I need to load complete models
(meshes done with cinema4d or blender) into the 3d view.

So it would be very nice, if someone could post me a link to an
example, where someone has successfully glued wxpython UI and a 3d
engine view loading meshes into the 3d view.

Regards
Bernd



From dborne at gmail.com  Mon Aug  6 09:30:32 2007
From: dborne at gmail.com (Dave Borne)
Date: Mon, 6 Aug 2007 08:30:32 -0500
Subject: Script that Navigates Page needs Javascript Functionality
In-Reply-To: <1186192690.100410.260840@g12g2000prg.googlegroups.com>
References: <1186192690.100410.260840@g12g2000prg.googlegroups.com>
Message-ID: <6e42ec490708060630u35c72e13s93da8c2653b054a6@mail.gmail.com>

> in order to view the results I need I need python to "navigate to"
> this Javascript link:
> javascript:__doPostBack('ctl00$cpMain$pagerTop','4')  This basically
> translates into "go to page 4."
> I read the posts on this group, and from what I understand, the
> functionality I need is with simplejson? If so, what is the syntax i
> would use to execute that Javascript?
> Or am I completely off base with using simplejson altogether?

I've been meaning to look into this library for interfacing with
Mozilla's spidermonkey javascript engine:
http://wwwsearch.sourceforge.net/python-spidermonkey/

It sounds like it might do what you want, but I'm not sure how much
work it would require.

-Dave


From arnodel at googlemail.com  Fri Aug 31 16:55:22 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 31 Aug 2007 20:55:22 -0000
Subject: Is there a simple way to exit a while loop on keystroke?
In-Reply-To: <1188583918.747640.300850@22g2000hsm.googlegroups.com>
References: <1188578827.809840.90100@r29g2000hsg.googlegroups.com>
	<1188581623.588967.78050@z24g2000prh.googlegroups.com>
	<1188583918.747640.300850@22g2000hsm.googlegroups.com>
Message-ID: <1188593722.696576.12390@y42g2000hsy.googlegroups.com>

On Aug 31, 7:11 pm, gsxg <rha... at gmail.com> wrote:
> Thanks,
> The curses library doesn't look to helpful to me.

And yet it is.

--
Arnaud



From rbygscrsepda at gmail.com  Sat Aug  4 00:03:38 2007
From: rbygscrsepda at gmail.com (rbygscrsepda at gmail.com)
Date: Fri, 03 Aug 2007 21:03:38 -0700
Subject: Relative-importing *
In-Reply-To: <46ae3894$0$19609$426a34cc@news.free.fr>
References: <1185559874.299008.167010@x40g2000prg.googlegroups.com>
	<871weth2gg.fsf@benfinney.id.au>
	<pan.2007.07.28.06.17.39.399342@REMOVE.THIS.cybersource.com.au>
	<46ae3894$0$19609$426a34cc@news.free.fr>
Message-ID: <1186200218.666444.254200@q3g2000prf.googlegroups.com>

Thanks to everybody for replying. (I apologize for the delayed
response: my connection's been down for a week.)

Yes, I'm importing * for a reason, a good one, I think. I have a set
of modules (the number planned to reach about 400) that would be
dynamically loaded by my program as needed, and they're somewhat
similar to each other. I wish each of them to import * from a certain
"parent" module, so that they'll receive whatever functions and
variables I want all of them to share (using the parent module's
__all__), which may be overrided by the "child" modules at their
discretion. Sort of like class inheritance, but I'm not doing that
because implementing that would be a lot more tedious and less
elegant.

But if this doesn't seem to be documented, and unintended...is it a
bug? If so, how do I file it?

Thanks again!



From nicolasg at gmail.com  Wed Aug  8 07:40:28 2007
From: nicolasg at gmail.com (NicolasG)
Date: Wed, 08 Aug 2007 11:40:28 -0000
Subject: How to avoid reverse code engineering of a python executable
Message-ID: <1186573228.419760.272240@k79g2000hse.googlegroups.com>

Hi guy's,

Couple of day's ago I asked for your help on how to create a single
file of a python executable. Now I want to proceed a little bit
further asking how can I avoid (or at least make it difficult) for
some one to extract my code by using reverse code engineer techniques?
I came on pyobfuscate but I would like more suggestions and guide to
achieve the most possible security in this matter.

Regards,
Nicoals.



From arne at vajhoej.dk  Sun Aug 19 15:55:19 2007
From: arne at vajhoej.dk (=?ISO-8859-1?Q?Arne_Vajh=F8j?=)
Date: Sun, 19 Aug 2007 15:55:19 -0400
Subject: Latest models of Gibson guitars
In-Reply-To: <1187548916.909340.37420@k79g2000hse.googlegroups.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<1187548916.909340.37420@k79g2000hse.googlegroups.com>
Message-ID: <46c8a01f$0$90262$14726298@news.sunsite.dk>

vedrandekovic at v-programs.com wrote:

[some spam deleted]

> This is  a newsgroup of programming language Python, stop with this!

Actually this was posted to a bunch of newsgroups of which one is
about python.

Arne


From basilisk96 at gmail.com  Fri Aug 24 23:26:05 2007
From: basilisk96 at gmail.com (Basilisk96)
Date: Sat, 25 Aug 2007 03:26:05 -0000
Subject: py2exe/distutils: how to include a tree of files?
In-Reply-To: <13cuhdr58m5one7@corp.supernews.com>
References: <13cuhdr58m5one7@corp.supernews.com>
Message-ID: <1188012365.509975.320500@e9g2000prf.googlegroups.com>

On Aug 24, 4:55 pm, Grant Edwards <gra... at visi.com> wrote:
> I'm packaging up a python program and need to include an entire
> directory tree in the distribution. the data_files=[] option to
> setup() is fine for individual files, but what do I do when I
> need to include an entire directory tree?
>
> On a more general note, I'm having trouble finding much
> documentation on py2exe at all.  There's a wiki page at
> py2exe.org, but it's pretty superficial.  It mentions looking
> at the distutils documentation for details, but I've no idea
> how distutils relates to py2exe or where in the distutils
> documentation to look for py2exe stuff (I don't see anything
> that looks familiar in the distutils docs).
>
> There must be some py2exe documentation somewhere...
>
> [http://sourceforge.net/projects/py2exe/hasn't been updated in
> 5 years, is there any reason why it's still around?]
>
> --
> Grant Edwards                   grante             Yow! LBJ, LBJ, how many
>                                   at               JOKES did you tell today??!
>                                visi.com

Grant,

Any os.walk() loop that you can conceive which will generate a list of
the kind [(dir1, pathList1), (dir2, pathList2), etc...] will work.
Each subdir of your top-level tree has to be listed this way with the
accompanying pathList of the subdir's files. I did this once for a
'samples' directory tree that I packaged with an app:

#sample data files
sampleDir = r'.\\samples'
for root, dirs, files in os.walk(sampleDir):
    sampleList = []
    if files:
        for filename in files:
            #ignore SVN dirs
            if ".svn" not in root:
                sampleList.append(os.path.join(root, filename))
        if sampleList:
            dataFiles.append((root, sampleList))

On a side note, I've discovered that matplotlib since 0.90 or maybe
earlier has specifically added a matplotlib.get_py2exe_datafiles()
function to add its necessary data files in this way. Wouldn't it be
nice if py2exe had something simple like that built in...

Have you tried GUI2Exe? I've found its interface quite easy to use.
It doesn't recurse into a dir tree (feature request?), but it makes
the selection process at least half as painful.

The py2exe docs leave something more to be desired. I found more tips
and help via Google, ASPN, and on this list.

Good luck,
Basilisk96



From greg.kujawa at gmail.com  Thu Aug  2 10:10:42 2007
From: greg.kujawa at gmail.com (gregarican)
Date: Thu, 02 Aug 2007 14:10:42 -0000
Subject: i am new to python-Please somebody help
In-Reply-To: <pan.2007.08.02.12.51.13.363293@REMOVE.THIS.cybersource.com.au>
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com>
	<pan.2007.08.02.12.51.13.363293@REMOVE.THIS.cybersource.com.au>
Message-ID: <1186063842.827016.95030@q3g2000prf.googlegroups.com>

On Aug 2, 8:51 am, Steven D'Aprano
<st... at REMOVE.THIS.cybersource.com.au> wrote:
> On Thu, 02 Aug 2007 09:31:43 +0000, cool.vimalsmail wrote:
>
> [snip]
>
> You would be better off actually writing a sensible subject line instead
> of grovelling.
>
> Subject: How to use gzip in Python? [beginner]
>
> Then, having written a good subject line, it might have suggested a good
> search string for Google: "gzip python"
>
> http://www.google.com.au/search?&q=gzip+python
>
> The first two links found will answer your question.
>
> --
> Steven.

This link answers my question --> http://www.google.com/search?hl=en&q=Python+list+rudeness.
Honestly, I have developed in both Ruby and Python for years now and
have consistently found that the Ruby community if more newbie-
friendly than Python's. Your points are well-taken in how to properly
post and how to do your own homework. Message correct. Delivery
lacking...



From theller at ctypes.org  Wed Aug 15 15:57:03 2007
From: theller at ctypes.org (Thomas Heller)
Date: Wed, 15 Aug 2007 21:57:03 +0200
Subject: Move files/directories to Recycle Bin using standard Python libs
In-Reply-To: <1187199757.774573.48940@q4g2000prc.googlegroups.com>
References: <f9va80$ciu$1@foggy.unx.sas.com>
	<1187199757.774573.48940@q4g2000prc.googlegroups.com>
Message-ID: <f9vlqf$cr0$1@sea.gmane.org>

kyosohma at gmail.com schrieb:
> On Aug 15, 11:39 am, Kevin D. Smith <Kevin.Sm... at sas.com> wrote:
>> I would like to move files and directories to the Recycle Bin on
>> Windows from Python.  I have found some older articles describing how
>> to do this, but they require additional packages to be installed.  I'm
>> working on a plugin for an existing project and only have the standard
>> library to work with.  Is there a way to use the Recycle Bin using
>> standard Python?
>>
>> --
>> Kevin D. Smith
> 
> Sounds like a Windows only thing to me, so you'll probably have to use
> the win32 package regardless. See the following links:
> 
> http://mail.python.org/pipermail/python-list/2004-October/287638.html
> http://tgolden.sc.sabren.com/python/win32_how_do_i/copy-a-file.html

Or access the win32 api directly with ctypes (included in Python 2.5).

Thomas



From petri.savolainen at iki.fi  Mon Aug 20 04:46:04 2007
From: petri.savolainen at iki.fi (Petri Savolainen)
Date: Mon, 20 Aug 2007 11:46:04 +0300
Subject: imaplib & Received: header(s)???
In-Reply-To: <13cgurcg663m003@corp.supernews.com>
References: <mailman.2160.1187512222.22759.python-list@python.org>
	<13cgurcg663m003@corp.supernews.com>
Message-ID: <fabkcj$qqm$1@sea.gmane.org>

Donn Cave wrote:

> | I need to get at the Received-for header to figure out at which address 
> | we received an email. We subscribe to a number of mailing lists using 
> | per-mailing-list addresses, and often, To: field contains something else 
> | than our address, thus the need for Received-for.
> |
> 
> "Anything recent"?  If you're getting IMAP advice from comp.lang.python,
> I think it's fair to say you will need to be more resourceful.  The
> RFC for IMAP4rev1 should be helpful.  I don't know the IMAP to get a
> single header field, but my guess is that your error is there.  Can you
> retrieve other fields that way?  Does the one you're looking for appear
> in the data if you get the whole header, for example with 'RFC822.HEADER'?
> It certainly does in my Python IMAP client, and this would have at least
> helped you refine your question.

Thanks Donn,

I had already checked everything relevant, including what you suggested. 
The only examples that I found including the Received header utilized 
the now-obsoleted rfc822 library in python from many years and versions 
back. Thus nothing recent.

However, you mentioning "RFC822.HEADER" working for you prompted me to 
try another mail server... to my surprise, everything worked. It appears 
some imap servers do not allow programmatic fetching of Received: 
information. Should've done this check sooner :-(

Thanks,

  Petri






From wgwigw at gmail.com  Sat Aug  4 03:49:47 2007
From: wgwigw at gmail.com (momobear)
Date: Sat, 04 Aug 2007 00:49:47 -0700
Subject: Help: GIS
In-Reply-To: <1186112804.718290.207580@z24g2000prh.googlegroups.com>
References: <1186112804.718290.207580@z24g2000prh.googlegroups.com>
Message-ID: <1186213787.212326.80320@i38g2000prf.googlegroups.com>

On Aug 3, 11:46 am, zxo102 <zxo... at gmail.com> wrote:
> Hi,
>     I am new in GIS area and need your suggestions for where I can
> start from.  I have a python based web application with a database.
> Now I would like to add a GIS map into my application. When a user
> clicks a certain area in the GIS map, it can grab the data from the
> database via my python based application. Do I have to use MapServer
> or Grass or some other  backends for this purpose?
>    Thanks  a lot.
>
> Ouyang

another link, http://code.djangoproject.com/wiki/GeoDjango, talk about
many python tools about GIS, hope help to u.



From creechm at gmail.com  Wed Aug 22 12:06:46 2007
From: creechm at gmail.com (Mark)
Date: Wed, 22 Aug 2007 16:06:46 -0000
Subject: Eval and raw string ??
Message-ID: <1187798806.029598.264740@q3g2000prf.googlegroups.com>

Eval() doesn't seem to recognize the r'string' format. Is there a way
around this.
Example:
If I input: ---------> eval("r'C:\tklll\ndfd\bll'")
I get the output:

Traceback (most recent call last):
  File "<pyshell#3>", line 1, in <module>
    eval("r'C:\tklll\ndfd\bll'")
  File "<string>", line 1
    r'C:	klll
       	    ^
SyntaxError: EOL while scanning single-quoted string

The same principle applies for exec.

Thanks in advance,
Mark



From michele.simionato at gmail.com  Fri Aug 31 01:26:20 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Fri, 31 Aug 2007 05:26:20 -0000
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188523096.427717.87380@x35g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<1188430887.481586.106760@l22g2000prc.googlegroups.com>
	<mailman.159.1188499976.28954.python-list@python.org>
	<1188504811.019632.186580@x35g2000prf.googlegroups.com>
	<46d75116$0$401$426a74cc@news.free.fr>
	<1188517050.174081.265900@x40g2000prg.googlegroups.com>
	<46d75d33$0$6231$426a34cc@news.free.fr>
	<1188520454.996940.293030@m37g2000prh.googlegroups.com>
	<46d76790$0$410$426a74cc@news.free.fr>
	<1188523096.427717.87380@x35g2000prf.googlegroups.com>
Message-ID: <1188537980.926587.201770@e9g2000prf.googlegroups.com>

On Aug 31, 3:18 am, Russ <uymqlp... at sneakemail.com> wrote:
> For the record, the guy I
> criticized
> made ridiculous assertions about DBC.

And that would be me? Oh my! LOL!
This is not nearly as fun as the guy who explained to Steve Holden how
Python works, but still ... ;)

> If you are upset about my criticism of one of your colleagues, please
> tell him to quite making
> outrageous assertions about something he obviously knows little about.

For the record I read the design by contract book by Meyer
years ago (the first edition) and I could not stomach it.
The paper you mentioned is even worse. Programmers asserting
that a given metodology can give 100% reliable software
are incompetents or liars or both. Period.

Of course there are methodologies which are better than
others (for instance automatic tests are better than
manual tests) and one should try various approaches on
the field.

However, IMNSHO, nowadays design by contract has been superseded
by unit tests and it makes little sense to use it. Once
you have automatic tests and once you make liberal use of
assert statements in your code, you should not feel the need
for more than that. You may think differently of course,
but you should know that I am a ferocious opponent of
heavyweight approaches, huge frameworks, and all that.
Most people in the Python community are. This is why I
think dBC will never enter in the core, and it would be
extremely little used even as a third party library
(BTW, it has already happened).

        Michele Simionato



From nospam.themindstorm at gmail.com  Fri Aug  3 14:45:14 2007
From: nospam.themindstorm at gmail.com (Alex Popescu)
Date: Fri, 3 Aug 2007 18:45:14 +0000 (UTC)
Subject: File Handling & TRY/EXCEPT
References: <33119.3366124809$1186129744@news.gmane.org>
	<f8va2a$8od$1@sea.gmane.org>
	<13677.732498809$1186148538@news.gmane.org>
Message-ID: <Xns9981DCF2C7515themindstorm@80.91.229.5>

"Robert Rawlins - Think Blue" <robert.rawlins at thinkbluemedia.co.uk>
wrote in news:13677.732498809$1186148538 at news.gmane.org: 

> Thanks for your ideas guys,
> 
> I'm unfortunately tied to 2.4 so don't have the full try except
> status, but I'm now working with the following code:
> 
>      def addApp(self, event):
>           try:
>                logfile =
> open('/pblue/new/Logs/Application.csv','a')
> 
>                now = datetime.datetime.now()
>                logstring = '%s,%s \n' % (event, str(now))
>                
>                try:                    
>                     logfile.write(logstring)
>                finally:
>                     logfile.close()
>           except:
>                self.addApp(event)
> 
> I'm trying to slowly debug my app and get rid of all the memory leaks,
> but its pain staking work, any help you can offer on that stuff would
> be a god send, I'm a little reluctant about posting all my app code on
> the lists as I'd like to keep some of it private.
> 
> How does that new version look? A little tidier?
> 
> Thanks guys,
> 

Now, you are sure the file is always close. What I don't think is 
correct is to retry to re-write the event (cause if opening the file 
crashed ones there are very good chances that it will throw the 2nd 
time).

./alex
--
.w( the_mindstorm )p.



From tim at tdw.net  Mon Aug 20 18:13:46 2007
From: tim at tdw.net (Tim Williams)
Date: Mon, 20 Aug 2007 23:13:46 +0100
Subject: reading a line in file
In-Reply-To: <R81738131.734.82889.2@mxextra>
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>
	<2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx>
	<2dc0c81b0708201207p7f83f2e0l6de15fd70be252a5@mail.gmail.com>
	<R81738131.734.82889.2@mxextra>
Message-ID: <9afea2ac0708201513u426cead0q6c2805e001d25bd1@mail.gmail.com>

On 20/08/07, Brian McCann <Brian.McCann at viziant.net> wrote:
>
> Shawn, Tim ,Jay
>
> many thanks,
>
> It looks like there are many ways this problem can be approached
>
> either by using  regex or a tokens
>
> Tim I'm not familiar with your solution, but will learn about that method
> also

Hi Brian,

> buildNum =  open('input.txt').read().split('build.number=')[1].split()[0]

Try this on its own:

print open('input.txt').read().split('build.number=')

See what is at the very beginning of the 2nd list item :)

My example just splits the whole file at "build.number=", so you know
the data you require is at the beginning of the 2nd list item returned
from the slice [ie: a_list[1].  You also know that data is followed by
a newline, so it will be the first item in the returned list [ie:
b_list[0] when you split a_list[1].

No need to iterate each line individually looking for a match and then
process the matching line to get at the data.  You can just go
straight to the data you require.

If your requirement is for multiple items from a single file then
another method would be required.

:)


From ghirai at ghirai.com  Sun Aug 12 15:09:11 2007
From: ghirai at ghirai.com (Ghirai)
Date: Sun, 12 Aug 2007 22:09:11 +0300
Subject: Drawing a graph
Message-ID: <20070812220911.fd2948e1.ghirai@ghirai.com>

Hello list,

I need to draw a graph, 2 axes, 2D, nothing fancy.
One of the axes is time, the other one is a series of integers.

I don't care much about the output format.

Are there any specialized libraries for this, or should i use PIL?

Thanks.

-- 
Regards,
Ghirai.


From mail at microcorp.co.za  Fri Aug  3 02:26:30 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 3 Aug 2007 08:26:30 +0200
Subject: Memory Leak with Tkinter Canvas (Python 2.5 Win32)
References: <1186068851.011344.322980@i13g2000prf.googlegroups.com>
Message-ID: <00f901c7d59b$95c1c620$03000080@hendrik>


"frikk" <fr...l.com> wrote:

>   1.  ....... Am I somehow leaving
> objects laying around that aren't being deleted? Is create_rectangle
> not the appropriate function to use?)

Try calling the canvas's delete method with the old rectangle before
making a new one.

- Hendrik



From sbassi at clubdelarazon.org  Wed Aug 15 13:11:41 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Wed, 15 Aug 2007 14:11:41 -0300
Subject: Combinatorial of elements in Python?
In-Reply-To: <46C32D6E.7070804@isy.liu.se>
References: <9e2f512b0708142203m782b0e10s817fb4d061ba0e46@mail.gmail.com>
	<46C2F538.8000900@isy.liu.se>
	<9e2f512b0708150651g7a9834cdm2db874d84804e362@mail.gmail.com>
	<46C32D6E.7070804@isy.liu.se>
Message-ID: <9e2f512b0708151011mc86ede7o68a92515c4cf3017@mail.gmail.com>

On 8/15/07, Mikael Olofsson <mikael at isy.liu.se> wrote:
> What is unclear here is in what order the keys should be visited. The
> following assumes that the keys should be considered in alphanumeric order.

Yes, my fault. The orden should be given by a string, like:

DCDBA
Using this dictionay.
A={'A':['1','2'],'B':['4','5'],'C':['6','7','8'],'D':['9']}

Should return:

'96941'
'97941'
'97942'
'96942'
'98941'
'98942'
'96951'
'97951'
'97952'
'96952'
'98951'
'98952'



-- 
Sebasti?n Bassi (???????)
Diplomado en Ciencia y Tecnolog?a.
GPG Fingerprint: 9470 0980 620D ABFC BE63 A4A4 A3DE C97D 8422 D43D

From carsten at uniqsys.com  Sat Aug  4 12:27:23 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Sat, 04 Aug 2007 12:27:23 -0400
Subject: Problems with headers in email.message
In-Reply-To: <9afea2ac0708040910q5de8b667n3c7b70818d920d29@mail.gmail.com>
References: <G80340210.8.1924.1@mxextra>
	<9afea2ac0708040910q5de8b667n3c7b70818d920d29@mail.gmail.com>
Message-ID: <1186244843.3385.18.camel@dot.uniqsys.com>

On Sat, 2007-08-04 at 17:10 +0100, Tim Williams wrote:
> Your script (as posted) works fine for me.
> 
>   I did need to change one import line to:  from email.Message import
> Message (note the capitalization)

The modules inside the email package appear to have changed from
capitalized names to lowercase names for Python 2.5.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From nadiapetrova20 at gmail.com  Mon Aug  6 15:35:23 2007
From: nadiapetrova20 at gmail.com (Nadi Petrova)
Date: Mon, 06 Aug 2007 12:35:23 -0700
Subject: =?utf-8?B?4peY4peY4pa6U2F0ZWxsaXRlIFRWIG9uIHlvdXIgUEMgLSBXYXRjaCBpdCBGUkVFIE5vd+KXhOKXmOKXmA==?=
Message-ID: <1186428923.518917.246660@g4g2000hsf.googlegroups.com>

Watch Satellite TV On Your Computer Without Paying Monthly Fees...

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From hadronquark at googlemail.com  Wed Aug  1 10:37:39 2007
From: hadronquark at googlemail.com (Hadron)
Date: Wed, 01 Aug 2007 16:37:39 +0200
Subject: Emacs + python
Message-ID: <ak8x8v2udo.fsf@googlemail.com>


Could anyone put me on the right track to developing Python with emacs
please : modes to consider, debugging etc hopefully all within emacs.

Any help and shared experiences much appreciated.



From manasd at gmail.com  Sat Aug 11 12:43:19 2007
From: manasd at gmail.com (MD)
Date: Sat, 11 Aug 2007 09:43:19 -0700
Subject: How to change a PyObject passed to the C extension
Message-ID: <1186850599.738739.195410@b79g2000hse.googlegroups.com>

Hi,
   I have a Python C extension which is passed a PyObject containing
an integer value. Is it possible to change this same PyObject so that
now the integer is of a different value?

Thanks and Regards,
-MD



From bignose+hates-spam at benfinney.id.au  Tue Aug 28 01:14:08 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 28 Aug 2007 15:14:08 +1000
Subject: "Try:" which only encompasses head of compound statement
References: <1188250535.607963.42540@22g2000hsm.googlegroups.com>
	<87wsvgfszm.fsf@benfinney.id.au>
	<13d7898odj2g19b@corp.supernews.com>
Message-ID: <87fy24fdgf.fsf@benfinney.id.au>

Scott David Daniels <daniels at dsl-only.net> writes:

> Actually, this will be followed by some foolishness because
> (1) [the "print" format argument was wrong]
> and
> (2) [the code attempts to loop over the failed input file anyway]

You're right. Shame on me for posting untested code snippets, Thanks
for the catch.

-- 
 \            "There was a point to this story, but it has temporarily |
  `\                 escaped the chronicler's mind."  -- Douglas Adams |
_o__)                                                                  |
Ben Finney


From deets at nospam.web.de  Sat Aug 18 18:42:50 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 19 Aug 2007 00:42:50 +0200
Subject: Parser Generator?
In-Reply-To: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
Message-ID: <5ipavkF3qq00oU1@mid.uni-berlin.de>

Jack schrieb:
> Hi all, I need to do syntax parsing of simple naturual languages,
> for example, "weather of London" or "what is the time", simple
> things like these, with Unicode support in the syntax.
> 
> In Java, there are JavaCC, Antlr, etc. I wonder what people use
> in Python? Antlr also has Python support but I'm not sure how good
> it is. Comments/hints are welcome. 

There are several options. I personally like spark.py, the most common 
answer is pyparsing, and don't forget to check out NLTK, the natural 
language toolkit.

Diez


From johnmasters at oxtedonline.net  Mon Aug 20 16:02:44 2007
From: johnmasters at oxtedonline.net (John K Masters)
Date: Mon, 20 Aug 2007 21:02:44 +0100
Subject: Python equivalent of Perl's $/
In-Reply-To: <1187637588.073514.202930@x40g2000prg.googlegroups.com>
References: <mailman.9.1187619031.26576.python-list@python.org>
	<1187637588.073514.202930@x40g2000prg.googlegroups.com>
Message-ID: <20070820200244.GB4424@spookie1.spookiegate>

On 19:19 Mon 20 Aug     , attn.steven.kuo at gmail.com wrote:
> 
> import StringIO
> 
> text = """\
> To mimic Perl's input record separator in
> Python, you can use a generator.
> And a substring test.
> Perhaps something like the following
> is what you wanted.
> """
> 
> mockfile = StringIO.StringIO(text)
> 
> def genrecords(mockfile, sep=".\n"):
>     buffer = ""
>     while True:
>         while sep in buffer:
>             idx = buffer.find(sep) + len(sep)
>             yield buffer[:idx]
>             buffer = buffer[idx:]
>         rl = mockfile.readline()
>         if rl == "":
>             break
>         else:
>             buffer = '%s%s' % (buffer, rl)
>     yield buffer
>     raise StopIteration
> 
> for record in genrecords(mockfile):
>     print "READ:", record
> 
> 
> --
> Hope this helps,
> Steven
Thanks, this also looks like a good way to go but ATM beyond my level of
Python knowledge. I've not reached the generator chapter yet but I'll
flag the message and return later.

Regards, John
-- 
War is God's way of teaching Americans geography
Ambrose Bierce (1842 - 1914)


From steve at holdenweb.com  Wed Aug 15 19:38:56 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 15 Aug 2007 19:38:56 -0400
Subject: Module imports during object instantiation
In-Reply-To: <1187206998.252482.300780@a39g2000hsc.googlegroups.com>
References: <4c3vo4-u7k.ln1@learner.hq.netapp.com>	<mailman.1931.1187030415.22759.python-list@python.org>	<46c16ec9$0$405$426a34cc@news.free.fr>	<mailman.1956.1187091452.22759.python-list@python.org>	<slrnfc36p9.21o.horpner@FIAD06.norwich.edu>	<mailman.1965.1187101832.22759.python-list@python.org>	<slrnfc3gg4.1l4.horpner@FIAD06.norwich.edu>	<mailman.2025.1187200876.22759.python-list@python.org>	<slrnfc6ieo.14k.horpner@FIAD06.norwich.edu>	<1187205375.871837.254400@r34g2000hsd.googlegroups.com>
	<1187206998.252482.300780@a39g2000hsc.googlegroups.com>
Message-ID: <fa02qa$l3k$1@sea.gmane.org>

Ritesh Raj Sarraf wrote:
> On Aug 16, 12:16 am, Ritesh Raj Sarraf <r... at researchut.com> wrote:
>> On Aug 15, 11:42 pm, Neil Cerutti <horp... at yahoo.com> wrote:
>>
[...]
> Oops!!! Looks like I completely missed this. It _did_ print the error
> message.
> Apologies to all for not keeping a close eye on the error message.
> 
Quite. It was obvious to many readers that you were fooling yourself 
with a false hypothesis. The probability of something so fundamental 
being wrong is vanishingly small.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From aleax at mac.com  Mon Aug  6 22:46:44 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 6 Aug 2007 19:46:44 -0700
Subject: boolean operations on sets
References: <1186409631.147290.323400@22g2000hsm.googlegroups.com>
	<5hotveF3l5gmkU1@mid.uni-berlin.de>
	<Michael.J.Fromberger-4236F2.15032306082007@localhost>
Message-ID: <1i2fw2i.w6f2eb19rgfjpN%aleax@mac.com>

Michael J. Fromberger <Michael.J.Fromberger at Clothing.Dartmouth.EDU>
wrote:
   ...
> Also, it is a common behaviour in many programming languages for logical
> connectives to both short-circuit and yield their values, so I'd argue
> that most programmers are proabably accustomed to it.  The && and || 
> operators of C and its descendants also behave in this manner, as do the

Untrue, alas...:

brain:~ alex$ cat a.c
#include <stdio.h>

int main()
{
    printf("%d\n", 23 && 45);
    return 0;
}
brain:~ alex$ gcc a.c
brain:~ alex$ ./a.out 
1

In C, && and || _do_ "short circuit", BUT they always return 0 or 1,
*NOT* "yield their values" (interpreted as "return the false or true
value of either operand", as in Python).


Alex
  


From kyosohma at gmail.com  Fri Aug 10 09:02:24 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 10 Aug 2007 06:02:24 -0700
Subject: Python MAPI
In-Reply-To: <1186740316.816775.130500@m37g2000prh.googlegroups.com>
References: <1184954229.222401.213380@k79g2000hse.googlegroups.com>
	<1184957337.367674.104760@i13g2000prf.googlegroups.com>
	<1184959701.447824.70890@q75g2000hsh.googlegroups.com>
	<1184960314.426690.238270@z28g2000prd.googlegroups.com>
	<1184965933.212060.214800@m3g2000hsh.googlegroups.com>
	<1185134453.934837.325310@w3g2000hsg.googlegroups.com>
	<1185196021.512126.93490@r34g2000hsd.googlegroups.com>
	<1186740316.816775.130500@m37g2000prh.googlegroups.com>
Message-ID: <1186750944.787750.77010@i38g2000prf.googlegroups.com>

On Aug 10, 5:05 am, vasudevram <vasudev... at gmail.com> wrote:
> On Jul 23, 6:07 pm, kyoso... at gmail.com wrote:
>
> >Well, I ran Process Monitor with some filters enabled to only watch
>
> Thunderbird and MS Word. Unfortunately, that didn't give me any of the
> registry edits, so I disabled my filters and ran it without. Now I
> have a log file with 28,000 entries. It's amazing to see all the stuff
> that happens in just a few moments, but how am I supposed to parse
> this mess?
>
> Explorer.exe and outlook express do thousands of the registry calls
> and the paths they manipulate vary wildly. Oh well, I'll be off the
> clock in about 15 minutes so it can wait until Monday.
>
> Thanks for your help. I'll post if I figure out anything...hopefully
> you'll do the same.
>
> ---
>
> Sorry for not replying earlier ... I searched this list for the topic
> (Python MAPI) a few times but couldn't find it - not sure why - maybe
> Google Groups's indexing gets messed up sometimes ...
>
> Yes, so many entries would be a problem to parse manually ...
>
> That's why I suggested using a grep for Windows - or, preferably, an
> egrep - which is a more powerful version of grep; e.g. basic grep only
> allows you to use one regexp at a time - while egrep allows you to use
> extended regular expressions, such as "pattern1|pattern2", also
> "patt(e|u)rn(1|2)" which looks in parallel for pattern1, patturn1,
> pattern2 and patturn2 - I used a made-up example where the spelling of
> pattern could be wrong, but it works for any other cases of
> alternative patterns and subpatterns as well. Not sure if there is any
> egrep for Windows - try Googling. If not, and the problem is important
> enough, you might want to install Cygwin (its a big download, so first
> check if it _does_ have egrep in it).
>
> Vasudev

There are some programs that do grep for Windows. I'll mess with them.

Mike



From thijs.braem at gmail.com  Fri Aug 31 18:55:16 2007
From: thijs.braem at gmail.com (thijs.braem at gmail.com)
Date: Fri, 31 Aug 2007 15:55:16 -0700
Subject: Python Unicode to String conversion
Message-ID: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>

Hi everyone,

I'm having quite some troubles trying to convert Unicode to String
(for use in psycopg, which apparently doesn't know how to cope with
unicode strings).

The error I keep having is something like this:
ERREUR:  S?quence d'octets invalide pour le codage ?UTF8? : 0xe02063

(sorry, locale is french, it means "byte sequence invalid for encoding
<<utf8>>", the value is probably an e with one of the french accents)

I've found lots of stuff about this googling the error, but I don't
seem to be able to find a "works always"-function just to convert a
unicode variable back to string...

If someone could find me a solution, that'd really be a lifesaver.
I've been losing hours and hours over this one :s

thijs



From bj_666 at gmx.net  Fri Aug 24 09:11:56 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 24 Aug 2007 13:11:56 GMT
Subject: any problem with py's RC?
References: <mailman.244.1187955882.32294.python-list@python.org>
Message-ID: <5j83osF3t3hraU4@mid.uni-berlin.de>

On Fri, 24 Aug 2007 19:44:37 +0800, Yan Zhu wrote:

> Here is 3 PYs, we found there is a big memory wasting, specially the program
> c.py, we found the memory will increase very soon.
> any body knows why? any RC's problem? thanks

You are creating reference cycles and instantiate many in very short time.
Objects with cyclic dependencies must be detected by the garbage collector
which takes some time.

Usually this is not a problem because generating lots of cycles in a tight
and endless ``while``-loop is not *that* common.  ;-)

You may take a look into the `weakref` module to avoid the cycles.

Ciao,
	Marc 'BlackJack' Rintsch


From sullivanz.pku at gmail.com  Wed Aug  8 02:23:40 2007
From: sullivanz.pku at gmail.com (Sullivan WxPyQtKinter)
Date: Wed, 08 Aug 2007 06:23:40 -0000
Subject: Seek the one billionth line in a file containing 3 billion lines.
Message-ID: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>

I have a huge log file which contains 3,453,299,000 lines with
different lengths. It is not possible to calculate the absolute
position of the beginning of the one billionth line. Are there
efficient way to seek to the beginning of that line in python?

This program:
for i in range(1000000000):
      f.readline()
is absolutely every slow....

Thank you so much for help.



From petri.savolainen at iki.fi  Sun Aug 19 04:26:21 2007
From: petri.savolainen at iki.fi (Petri Savolainen)
Date: Sun, 19 Aug 2007 11:26:21 +0300
Subject: imaplib & Received: header(s)???
Message-ID: <fa8urj$32r$1@sea.gmane.org>

Hello,

Is there a way to get at the "Received" header(s) or is there something 
in imaplib or imap server implementations that hides these? If not, what 
IMAP FETCH command should be used? I've used for example 
"BODY[HEADER.FIELDS (RECEIVED)]" and it always returns empty ("\r\n"). 
Despite the Received - header existing, as demonstrated by taking a look 
at message sources via desktop email clients.

I need to get at the Received-for header to figure out at which address 
we received an email. We subscribe to a number of mailing lists using 
per-mailing-list addresses, and often, To: field contains something else 
than our address, thus the need for Received-for.

Any help would be much appreciated - this is baffling me and I've not 
found anything recent that would help.

Thanks,

  Petri



From ldo at geek-central.gen.new_zealand  Mon Aug 27 18:57:26 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Tue, 28 Aug 2007 10:57:26 +1200
Subject: "Try:" which only encompasses head of compound statement
References: <1188250535.607963.42540@22g2000hsm.googlegroups.com>
Message-ID: <favko2$akh$2@lust.ihug.co.nz>

In message <1188250535.607963.42540 at 22g2000hsm.googlegroups.com>, 
Jameson.Quinn at gmail.com wrote:

> try:
>     for line in open(myFileName):
>         count += 1
> except IOError:
>     print "Can't open myfile"
> 
> (I know, this is bad, I never close the file, but its just for
> illustration).

No, that's fine. The file object returned by "open" is refcounted, so when
the last reference to it disappears, it is closed.


From aahz at pythoncraft.com  Fri Aug 24 09:17:48 2007
From: aahz at pythoncraft.com (Aahz)
Date: 24 Aug 2007 06:17:48 -0700
Subject: Regular expression use
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
Message-ID: <famlps$e6k$1@panix3.panix.com>

In article <famdl6$p9j$1 at gemini.csx.cam.ac.uk>,
Nick Maclaren <nmm1 at cus.cam.ac.uk> wrote:
>
>For reasons that I won't explain, as they are too complicated
>and not terribly relevant, I am interested in discovering what
>people actually use regular expressions for.  Not the subject
>domain, but the construction of the regular expressions.

Your question as phrased makes no sense to me.  For that matter, it isn't
even a question.  ;-)

Side note: please don't cross-post between c.l.py and c.l.perl.* -- the
group cultures are different and it's too easy to start flamewars.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From wildemar at freakmail.de  Wed Aug 22 18:13:56 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Thu, 23 Aug 2007 00:13:56 +0200
Subject: introspection and functions
In-Reply-To: <1187819949.515982.15450@r23g2000prd.googlegroups.com>
References: <1187819949.515982.15450@r23g2000prd.googlegroups.com>
Message-ID: <46CCB524.3060608@freakmail.de>

yagyala wrote:
> Hi. I would like to be able to tell, at run time, how many parameters
> a function requires. Ideally I would like to be able to tell which are
> optional as well. I've tried looking at the functions attributes, but
> haven't found one that helps in this. How can I do this?
>   
I've never used it before, but there is the "inspect" module. 
<url:http://docs.python.org/lib/module-inspect.html>.
That any good?

/W


From richardjones at optushome.com.au  Sat Aug  4 03:40:23 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Sat, 04 Aug 2007 17:40:23 +1000
Subject: Registration is open for the 5th Python game challenge!
Message-ID: <46b42d65$0$14986$afc38c87@news.optusnet.com.au>

The fifth PyWeek is only a month away. Come along and join the fun: write a
video game in a week!

There's some really interesting new libraries that have popped up recently.
Have a gander on the pyweek message board for more info.


REGISTRATION IS OPEN

Visit the PyWeek website for more information: 

  http://pyweek.org/ 


THE PYWEEK CHALLENGE: 

- Invites all Python programmers to write a game in one week from scratch 
  either as an individual or in a team, 
- Is intended to be challenging and fun, 
- Will hopefully increase the public body of python game tools, code and 
  expertise, 
- Will let a lot of people actually finish a game, and 
- May inspire new projects (with ready made teams!) 

Entries must be developed during the challenge, and must incorporate some 
theme decided at the start of the challenge. The rules for the challenge are 
at: 

  http://media.pyweek.org/static/rules.html 


    Richard 

-- 
Visit the PyWeek website:      http://pyweek.org/


From jeffober at gmail.com  Mon Aug 20 15:39:28 2007
From: jeffober at gmail.com (Jeff)
Date: Mon, 20 Aug 2007 19:39:28 -0000
Subject: 'REPL' style IDE
In-Reply-To: <1187633038.373751.244700@i38g2000prf.googlegroups.com>
References: <1187632249.748945.158910@i13g2000prf.googlegroups.com>
	<1187633038.373751.244700@i38g2000prf.googlegroups.com>
Message-ID: <1187638768.783508.327010@r34g2000hsd.googlegroups.com>

python-mode in Emacs.



From james-netnews at and.org  Tue Aug  7 12:05:16 2007
From: james-netnews at and.org (James Antill)
Date: Tue, 07 Aug 2007 16:05:16 -0000
Subject: All leading tabs or all leading spaces - why isn't that enforced?
References: <y8Rti.1088$3x.121@newssvr25.news.prodigy.net>
Message-ID: <pan.2007.08.07.16.05.07@and.org>

On Tue, 07 Aug 2007 02:53:18 +0000, John Nagle wrote:

> One can argue over tab vs. space indentation, but mixing the two is just
> wrong.  Why not have CPython report an error if a file has both leading
> tabs and leading spaces?  I know that was proposed at some point, but I
> don't think it ever went in. That would catch a common error introduced
> during maintenance.

 While I agree it should be default, you can enable extra checking with
-tt. Eg.

% jhexdump /tmp/abcd.py
0x00000000: 2321 202F 7573 722F 6269 6E2F 7079 7468  #! /usr/bin/pyth
0x00000010: 6F6E 202D 7474 0A0A 6966 2054 7275 653A  on -tt..if True:
0x00000020: 0A09 7072 696E 7420 2261 220A 2020 2020  ..print "a".    
0x00000030: 2020 2020 7072 696E 7420 2262 220A           print "b".
% /tmp/abcd.py
  File "/tmp/abcd.py", line 5
    print "b"
            ^
TabError: inconsistent use of tabs and spaces in indentation
% python /tmp/abcd.py
a
b

...note that this doesn't require all spaces or all tabs, just that
their usage has to be consistent.

-- 
James Antill -- james at and.org
C String APIs use too much memory? ustr: length, ref count, size and
read-only/fixed. Ave. 44% overhead over strdup(), for 0-20B strings
http://www.and.org/ustr/


From kaldrenon at gmail.com  Tue Aug 21 08:52:38 2007
From: kaldrenon at gmail.com (kaldrenon)
Date: Tue, 21 Aug 2007 12:52:38 -0000
Subject: Latest models of Gibson guitars
In-Reply-To: <1187657694.106990.266830@z24g2000prh.googlegroups.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<1187548916.909340.37420@k79g2000hse.googlegroups.com>
	<1187579396.285862.186860@e9g2000prf.googlegroups.com>
	<9K6dnY8HnIUNHlTbnZ2dnUVZ_gGdnZ2d@comcast.com>
	<1187657694.106990.266830@z24g2000prh.googlegroups.com>
Message-ID: <1187700758.572516.186610@57g2000hsv.googlegroups.com>

On Aug 20, 8:54 pm, Twisted <twisted... at gmail.com> wrote:
> If the message then
> says something absurd, like "this is a newsgroup about Python" when
> I'm reading it in cljp, well, what do you expect? :P

I think most would expect you to go, "WTF?" but then, like a rational
person, click the helpful little "More options" link that GG provides
(I'm assuming you use GG to read as well as to post, forgive me if I'm
wrong) and double-check before harassing someone because you jumped to
conclusions.

> though nothing in the headers would indicate this.

Newsgroups: comp.lang.java.programmer,
microsoft.public.dotnet.framework.aspnet, comp.lang.python,
rec.photo.digital, alt.home.repair
From: mobile... at gmail.com
Date: Sun, 19 Aug 2007 17:34:58 -0000
Local: Sun, Aug 19 2007 1:34 pm
Subject: Latest models of Gibson guitars

That's the header GG shows. Preeeetty clear.

Just a tip for future reference - all's fair if you weren't aware of
this feature of GG's interface.



From nstjelja at gmail.com  Thu Aug  2 02:51:50 2007
From: nstjelja at gmail.com (Nikola Stjelja)
Date: Thu, 2 Aug 2007 08:51:50 +0200
Subject: Time object?
In-Reply-To: <496954360708010918n22e525f8y1f453714a7d1155c@mail.gmail.com>
References: <496954360708010918n22e525f8y1f453714a7d1155c@mail.gmail.com>
Message-ID: <2d24984a0708012351w399eb70ev7d2e968725602f73@mail.gmail.com>

On 8/1/07, Robert Dailey <rcdailey at gmail.com> wrote:
>
> Hi,
>
> I'm well aware of the datetime module, however it is really inconsistent
> and useless to me. In order to do any arithmetic on time objects, I have to
> use the 'timedelta' class, which doesn't even allow me to do all the math I
> want to do.
>
> For example, I want to do "1 / timeobj", where timeobj might represent a
> time in the format of "00:00:00.000000". Do I have to code my own class
> for this, or is there some other third party library out there that will
> allow me to do this?
>
> Thanks.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Convert each date you use to a timestamp, make all your calculations using
those timestamps, and then when you need a date back just convert the
desired timestamp to date time format of your choosing.

-- 
Please visit this site and play my RPG!

http://www.1km1kt.net/rpg/Marinci.php
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From steve at REMOVE.THIS.cybersource.com.au  Sat Aug  4 00:56:19 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 04 Aug 2007 14:56:19 +1000
Subject: How to pass a reference to the current module
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<pan.2007.08.04.01.46.50.985228@REMOVE.THIS.cybersource.com.au>
	<f90lon$av5$1@daisy.noc.ucla.edu>
	<7xtzrg3vof.fsf@ruckus.brouhaha.com>
	<f90tvv$nt7$2@zinnia.noc.ucla.edu>
Message-ID: <pan.2007.08.04.04.56.18.773038@REMOVE.THIS.cybersource.com.au>

On Fri, 03 Aug 2007 21:06:23 -0700, James Stroud wrote:

> Its very close. However, there is the possibiltiy that main.py and 
> UserDefined1.py are the same module. In such a case I'm guessing that I 
> need to resort to the gymnastics of frame inspection I mentioned 
> earlier. 


I suggest you're falling for the anti-pattern of "Big Design Up Front",
and are overly complicating your system "just in case it's useful". Why
not just _insist_ that main.py and UserDefined1.py must be different
modules? You're the application developer, you're allowed to do that.


> The problem is when this combination of possibilities exists:
> 
>     1. main.py is named without the .py (e.g. `main`) as would be
>        the convention for "programs"), and is not a true python
>        module as a result--perhaps python has a mechanism for
>        importing such files?

I don't believe it does.


>     2. foo is defined in `main`

Maybe you should just prohibit that? Do you really want to allow users to
call arbitrary code in your main application at arbitrary times and places?

Maybe you do. Okay, it's your gun and your foot.

But in any case, it shouldn't matter. main is the program running -- it
has to be, because you can't import it from another program -- so
globals()['foo'] will work.


> Possibility two (even when it is a properly named module) sets the stage 
> for a circular import, but I believe in python this is not entirely 
> worrisome. However, the combination above makes it difficult to pass a 
> reference to the `main` namespace without some sort of introspection. 

That's what globals() is for.


> Ideally, I would prefer to not require the user to provide some mapping 
> as it detracts from the convenience of the API. For example:
> 
>     from UserDefined1 import some_function
>     def foo(): [etc.]
>     def doit(): [etc.]
>     mapping = {
>                 'foo' : foo,
>                 'doit' : doit,
>                 'some_function' : some_function
>               }
> 
> The idea would be that the above mapping would be specified in the 
> configuration file:
> 
> [foo]
> param1 = float
> param2 = 4
> 
> [option1]
> __module__ = 'UserDefined1'
> __function__ = 'doit'


I'm not sure why you need the quotation marks around the module and
function names. What else could UserDefined1 be, other than a string?


-- 
Steven.



From jjl at pobox.com  Wed Aug  1 15:38:23 2007
From: jjl at pobox.com (John J. Lee)
Date: Wed, 01 Aug 2007 19:38:23 GMT
Subject: UK Ordnance survey coordinates and Geocoding anyone ?
References: <f8ihef$m7r$1$8300dec7@news.demon.co.uk>
Message-ID: <87ps2759lc.fsf@pobox.com>

Ken Starks <straton at lampsacos.demon.co.uk> writes:
[...]
> http://www.magic.gov.uk/ [snip rest of URL...]

Cool, I had no idea we still had a department of magic!

I'll keep my eyes peeled for Mr. Norrell...


John


From kyosohma at gmail.com  Thu Aug  2 15:27:27 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 02 Aug 2007 19:27:27 -0000
Subject: problems playing with dates from any month.
In-Reply-To: <mailman.1525.1186078580.22759.python-list@python.org>
References: <f81479dd0708021031s208afc54y59780b19889d268b@mail.gmail.com>
	<f8t533$6n6$1@sea.gmane.org>
	<mailman.1525.1186078580.22759.python-list@python.org>
Message-ID: <1186082847.821344.171560@e16g2000pri.googlegroups.com>

On Aug 2, 1:16 pm, "krishnakant Mane" <researchb... at gmail.com> wrote:
> On 02/08/07, Ian Clark <icl... at mail.ewu.edu> wrote:
>
>
>
> >http://docs.python.org/lib/node85.html
>
> I looked there even before.
> but could not figure out what the code did.
> I know in that variable called s there was a string in a valid date format.
> but when datetime.strptime was used, I did not understand the place
> where a date object say d was created.
> I would expect some thing like d = and the function.  but I did not fine that.
> only reference was the datetime module and the documentation is not as good.
> another question I am getting is that where is the list of all
> formatting characters.  like for example Y is 4 digit year M is month
> MM is month in 2 digits etc.
> I am trying to locate a list of all these denoters.
> can you provide me the place?
>
> > Then it's just:
>
> > if date_obj.day == 5:
> >      print 'It's the fifth day of the month'
>
> this was much better than the documentation, thanks,
> regards,
> Krishnakant.

The various flags for the strftime() are here, near the middle of the
page: http://docs.python.org/lib/module-time.html

Not sure why the docs don't point to this page when talking about the
datetime's almost identical method.

Mike



From markacy at gmail.com  Sat Aug  4 09:53:43 2007
From: markacy at gmail.com (markacy)
Date: Sat, 04 Aug 2007 13:53:43 -0000
Subject: the one python book
In-Reply-To: <mailman.1611.1186233912.22759.python-list@python.org>
References: <mailman.1611.1186233912.22759.python-list@python.org>
Message-ID: <1186235623.585135.42630@l70g2000hse.googlegroups.com>

On 4 Sie, 15:23, "dhr" <dima.hris... at gmail.com> wrote:
> newbie question:
>
> Is there a 'K&R" type of Python book? The book that you'd better have on
> your shelf if you are going into Python?

There are actually two of them:

"How to Think Like a Computer Scientist: Learning with Python" by
Allen B. Downey, Jeffrey Elkner and Chris Meyers
http://www.ibiblio.org/obp/thinkCSpy/

and

"Dive Into Python" by Mark Pilgrim
http://diveintopython.org/toc/index.html

Hope this helps :-)

Cheers and good luck,
Marek



From max at alcyone.com  Sun Aug 12 22:28:19 2007
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 12 Aug 2007 19:28:19 -0700
Subject: Fatest standard way to sum bytes (and their squares)?
In-Reply-To: <f9mmq0$885$00$1@news.t-online.com>
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
	<f9mlne$k0k$02$2@news.t-online.com>
	<f9mlvv$k0k$02$3@news.t-online.com>
	<f9mmq0$885$00$1@news.t-online.com>
Message-ID: <FtmdndI4kJlZXCLbnZ2dnUVZ_r-vnZ2d@speakeasy.net>

Peter Otten wrote:

> from itertools import imap
> 
> def summit_array(data=data, lookup=lookup):
>     a = array.array("B")
>     a.fromstring(data)
>     return sum(a), sum(imap(lookup.__getitem__, a))
> 
> $ python -m timeit -s'from summit import summit_array as summit' 'summit()'
> 100 loops, best of 3: 9.15 msec per loop
> 
> I think I'll stop here...

Yes, this was the fastest approach of all the alternatives I tried. 
Plugging the algorithm in the tool, it makes it about twice as fast as 
the generator-sum method I was using before, and about _five_ time as 
fast as a naive for loop.  The use of an array is particularly clever; I 
never would have thought of that.

Thanks to everyone for their ideas.  Amusingly I posted it late last 
night (well, this morning I guess), not expecting much, at least until 
the next day, but got a factor of two speedup within half an hour!

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   It is morale that wins the victory.
    -- Gen. George C. Marshall


From mkent at acm.org  Sun Aug  5 23:54:09 2007
From: mkent at acm.org (Mike Kent)
Date: Sun, 05 Aug 2007 23:54:09 -0400
Subject: (Re)announcing APL 2007
Message-ID: <5hnkb3F3hus4jU1@mid.individual.net>


APL 2007 conference on Array Programming

     co-located with OOPSLA 2007


Sponsor:              ACM SIGAPL

Where:                Montreal

When:                 October 21 (tutorials)
                       October 22/23  (main conference program)

Keynote               Guy Steele
speaker:              Sun Microsystems Laboratories


Links:
     Info:             http://www.sigapl.org/apl2007.html
     Registration:     http://www.regmaster.com/conf/OOP07/oop07.pdf

     OOPSLA:           http://www.OOPSLA.org/oopsla2007


From laelahaellallah5 at gmail.com  Sun Aug 12 21:17:03 2007
From: laelahaellallah5 at gmail.com (laelahaellallah5 at gmail.com)
Date: Sun, 12 Aug 2007 18:17:03 -0700
Subject: The Truth
Message-ID: <1186967823.072801.260580@d55g2000hsg.googlegroups.com>

Explore & discover & be convinced that ISLAM is the truth! ...
Please Visit:
http://www.beconvinced.com



From llasram at gmail.com  Fri Aug 17 17:48:19 2007
From: llasram at gmail.com (Marshall T. Vandegrift)
Date: Fri, 17 Aug 2007 17:48:19 -0400
Subject: Encryption and hashing
References: <1187377630.017794.36510@50g2000hsm.googlegroups.com>
Message-ID: <87wsvtn87w.fsf@seneca.iss.local>

Kless <jonas.esp at googlemail.com> writes:

> For who knows any of criptography I comment that you can use
> algorithms as secure as Rijndael, Twofish, or Serpent with the CFB
> cipher mode. And for hash you can use RIPEMD, SHA-2 or WHIRLPOOL.

PyCrypto does includes the AES version of Rijndael as Crypto.Cipher.AES
and the 256-bit version of SHA-2 as Crypto.Hash.SHA256.

-Marshall



From tleeuwenburg at gmail.com  Fri Aug 31 11:30:16 2007
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: Fri, 31 Aug 2007 15:30:16 -0000
Subject: Setting a read-only attribute
In-Reply-To: <1188548061.663133.273160@q5g2000prf.googlegroups.com>
References: <1188509700.915517.178440@z24g2000prh.googlegroups.com>
	<1188548061.663133.273160@q5g2000prf.googlegroups.com>
Message-ID: <1188574216.529447.140390@i38g2000prf.googlegroups.com>

On Aug 31, 6:14 pm, Alexandre Badez <alexandre.ba... at gmail.com> wrote:
> On Aug 30, 11:35 pm, "tleeuwenb... at gmail.com" <tleeuwenb... at gmail.com>
> wrote:
>
> > I have an object and wish to set an attribute on it which,
> > unfortunately for me, is read-only.
>
> > How can I go about this?
>
> > Cheers.
> > -T
>
> Could you show the object you want to set his attribute?
> Until that, it's difficult to answer to you.
>
> PS: If the attribut is on read only, their must a good reason for
> that ;)

Hi all,

Thanks for all the responses. What I'm trying to do is kludge around
something. sys.settrace takes a method whose arguments are (frame,
event, arg). I want to have a tracer class which can be instantiated
and listen in on these trace calls.

Another way to go about it *might* be to have a module-level list of
registered Tracer objects which a module-level trace method informs of
events. It would probably be easier. In fact, I'll go do that.

*That said*, I still think it makes sense to be able to have objects
register with sys.settrace.

So what I did then was declare a static method with the same pattern
expected by sys.settrace. I then want to use something like __dict__
or __setattr__ to give that method a reference to the owning object.
And this is what I'm trying to do -- declare a static method, then "un-
static it" by adding a reference to the callable object...

Here's some code:
------------------------------------------------------------

import sys


class Tracer:
    '''
    Instantiate this in order to access program trace information.

    '''

    def _getcallback(self):

        @staticmethod
        def callback(frame, event, arg):
            print "tracing ...", tracerReference
            #print "line ", frame.f_lineno, frame.f_locals

        return callback

    def startTrace(self):
        callback = self._getcallback()
        callback.__dict__['tracerReference'] = self
        sys.settrace(callback)


def foo(dict):
    for i in range(2):
        pass

if __name__ == "__main__":
    t = Tracer()
    t.startTrace()
    foo({1 : 5})



From semanticist at gmail.com  Fri Aug 31 02:10:45 2007
From: semanticist at gmail.com (Miles)
Date: Fri, 31 Aug 2007 02:10:45 -0400
Subject: fcntl problems
In-Reply-To: <1188512377.441241.107900@q4g2000prc.googlegroups.com>
References: <1188512377.441241.107900@q4g2000prc.googlegroups.com>
Message-ID: <a49e45f50708302310v1c982a6ue22bbfe72e94436b@mail.gmail.com>

On 8/30/07, mhearne808 wrote:
> I'm having a number of problems with the fcntl module.

Read this first: http://linux.die.net/man/2/flock

> First of all, if I try this:
> file = open("counter.txt","w+")
> fcntl.flock(file.fileno(), fcntl.LOCK_NB)
>
> I get this:
> ---------------------------------------------------------------------------
> <type 'exceptions.IOError'>               Traceback (most recent call
> last)
> /Users/mhearne/src/python/<ipython console> in <module>()
> <type 'exceptions.IOError'>: [Errno 9] Bad file descriptor

That should be:
>>> fcntl.flock(f.fileno(), fcntl.LOCK_EX | fcntl.LOCK_NB)

> Proceeding forward with the locked file, let's say I do the above in
> Python interactive Process A.  Then in python interactive Process B, I
> repeat the "open" function on the same file with the same
> permissions.  Then, in each process, I write some text to the file
> using the write() method.  After closing the file in both processes,
> the only text I see in the file is from Process B!

This is due to two issues: caching and file position.  When you open
the file in both processes as 'w+', they are both positioned at the
*current* EOF, but from that point on the offset is not externally
influenced.  The correct sequence of events should be:
- open file in mode w+
- obtain exclusive lock
- f.seek(0, 2) # (to end of file)
- write to file
- f.flush() # or f.close()
- release lock

> Is this my lack of understanding, or have I discovered a bug?

If you find yourself asking this question, it's too often the former :)

-Miles


From franz.steinhaeusler at gmx.at  Sun Aug  5 08:44:55 2007
From: franz.steinhaeusler at gmx.at (Franz Steinhäusler)
Date: Sun, 05 Aug 2007 14:44:55 +0200
Subject: Best programs written completly in Python
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
Message-ID: <0ahbb3hpgici70roicu47fpnob21bteh5c@4ax.com>

On Sun, 05 Aug 2007 12:14:38 +0200, Franz Steinh?usler
<franz.steinhaeusler at gmx.at> wrote:

>Hello NG,
>
>wWhat are the best programs in your opinion, written entirly
>in pyhton, divided into categories like:

Many thanks,

The restriction, I want, is to comply the programs written in pygame, 
pygtk, wxPython, tkinter or console programs.

There are really "high sophisticated" programs, if you don't mind my
naming it so, as:

XPN newsreader, Boa Constructor, many pygame programs, 
gtkrawgallery, cornice graphics viewer, ...

I'm only interested to have a list, or even help to 
extend an existing one.

On wxPython, there also exist such a list:

http://wiki.wxpython.org/wxPythonPit_Apps
-- 
Franz Steinhaeusler


From paddy3118 at googlemail.com  Fri Aug 17 14:54:07 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Fri, 17 Aug 2007 18:54:07 -0000
Subject: Naming dictionaries recursively
In-Reply-To: <1187361791.979162.46330@22g2000hsm.googlegroups.com>
References: <1187354296.177606.273300@22g2000hsm.googlegroups.com>
	<5ilkebF3oltfoU2@mid.uni-berlin.de>
	<1187361791.979162.46330@22g2000hsm.googlegroups.com>
Message-ID: <1187376847.158312.234560@w3g2000hsg.googlegroups.com>

On Aug 17, 3:43 pm, TYR <a.harrow... at gmail.com> wrote:
> > So the tougher problem seems to be parsing those lines.  That is not a
> > valid Python dictionary unless the names `Bob`, `Humboldt`, `red`, and
> > `predatory` are not already defined.  So you can't just ``eval`` it.
>
> In what way? {'key': val}, right?
>
> Anyway, I can always change the format they go into the file in.

If you control the file format then you could create a valid python
list of dictionaries as the intermediate file format. Something like:

  data = [
  {'name' : 'Bob', 'species' : 'Humboldt', 'colour' : 'red',
'habits' : 'predatory'},
  { ... },
  ...
  }

You can then name the file with a .py ending and import it as a list
of dictionaries that you can then process to form a dict of dicts:

  datadict = dict( (data2name(d), d) for d in modulename.data )

- Paddy.





From bdesth.quelquechose at free.quelquepart.fr  Wed Aug  1 16:38:31 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 01 Aug 2007 22:38:31 +0200
Subject: access the name of my method inside it
In-Reply-To: <1186000119_6209@sp12lax.superfeed.net>
References: <1185959202.302467.276080@x35g2000prf.googlegroups.com>
	<5hb1ebF3inuf2U6@mid.uni-berlin.de>
	<1185973639.234450.305690@g12g2000prg.googlegroups.com>
	<1186000119_6209@sp12lax.superfeed.net>
Message-ID: <46b0ef7b$0$8216$426a34cc@news.free.fr>

Cousin Stanley a ?crit :
>>>>def my_method():
>>>>
>>>>    # do something
>>>
>>>>    # how do I get the name of this method 
>>>>    # which is my_method here?
>>>
>>>Why do you need this?  There are ways but those 
>>>are not really good for production code.
>>>
>>
>>I am going to use this in Django. I am trying to implement 
>>a permission here, where in the database store the methods 
>>that the user are allowed to execute. 
>>
>>for example if the method is  def create_event() :
>>the method will look for create_event in the database 
>>to see if it allow to be execute.
> 
> 
> james .... 
> 
>   Perhaps a simple-minded hard-coded solution
>   might work .... 
> 
>      def permission_check( name ) : 
> 
>          permission = DB.permission_check( name )
>  
>          if not permission : 
> 
>              print 'No Execute Permission for %s ' % name
> 
>              sys.exit( -1 )

An exception would be better here.

>     def my_method() : 
> 
>         permission_check( "my_method" )
> 
>         ....
> 

May I suggest ?

class Unauthorized(Exception): pass

def check_permission(permission):
   if not DB.check_permission(permission):
     raise Unauthorized(permission)

def requires_perm(func):
   def with_check(*args, **kw):
     check_permission(func.__name__)
     return func(*args, **kw)
   return with_check

@requires_perm
def my_method():
    # do something useful here


From aleax at mac.com  Thu Aug 30 22:26:58 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 30 Aug 2007 19:26:58 -0700
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
Message-ID: <1i3ob5k.dm3jmoqx1z68N%aleax@mac.com>

<zzbbaadd at aol.com> wrote:
   ...
> In my case of have done os.listdir() on two directories. I want to see
> what files are in directory A that are not in directory B.

So why would you care about WHERE, in the listdir of B, are to be found
the files that are in A but not B?!  You should call .index only if you
CARE about the position.

def inAnotB(A, B):
    inA = os.listdir(A)
    inBs = set(os.listdir(B))
    return [f for f in inA if f not in inBs]

is the "one obvious way to do it" (the set(...) is just a simple and
powerful optimization -- checking membership in a set is roughly O(1),
while checking membership in a list of N items is O(N)...).


Alex


From slippy.lane at googlemail.com  Sat Aug  4 11:38:23 2007
From: slippy.lane at googlemail.com (Slippy)
Date: Sat, 04 Aug 2007 15:38:23 -0000
Subject: Problems with headers in email.message
Message-ID: <1186241903.509471.26460@d55g2000hsg.googlegroups.com>

Hi, python newbie, struggling to learn here. I'm trying to write a
simple program which posts messages to my google group (via email).
I'm using smtplib, email and email.message to build and send a
message, but all the header attributes are appearing in the message
body, so my messages are arriving with loads of junk in the body, no
subject line and only the skinniest of headers. I know I'm doing
something wrong, but I don't know what...

Here's a simplification of what I'm doing....essentially, I've taken
from what I've learned at
http://codeidol.com/python/python3/Client-Side-Scripting/pymail-A-Console-Based-Email-Client/

-------------Snip Here-------------Snip Here-------------Snip
Here-------------
import smtplib, email
from email.message import Message
m = Message( )
m['From'] = 'Slippy <user at myemail.com>'
m['To'] = 'mygroup at googlegroups.com'
m['Subject'] = 'A Test Message'
m.set_payload('This is a test email. Please ignore')
s = smtplib.SMTP('smtp.myemail.com')
failed =
s.sendmail('user at myemail.com','mygroup at googlegroups.com',str(m))
if failed:
 print 'Message sending failed.'
else:
 print 'Message sent.'
print 'Bye.'
-------------Snip Here-------------Snip Here-------------Snip
Here-------------

Now, I get all the right responses, and the message sends ok. I go and
check my inbox, and the message is there, but the From, To and Subject
lines I created (as well as a preceding blank line and a "From nobody"
line) are in the message body, followed by the body text.

How do I assign values to the header?

I'd appreciate any help anyone can give me with this.



From SMERSH009X at gmail.com  Sun Aug  5 05:06:54 2007
From: SMERSH009X at gmail.com (SMERSH009)
Date: Sun, 05 Aug 2007 09:06:54 -0000
Subject: Formatting Results so that They Can be Nicely Imported into a
	Spreadsheet.
In-Reply-To: <1186284359.668342.5880@d30g2000prg.googlegroups.com>
References: <1186270555.514649.311280@d30g2000prg.googlegroups.com>
	<1186278638.931477.39760@z24g2000prh.googlegroups.com>
	<Avati.40$Tu1.6@newsfe12.lga>
	<1186284359.668342.5880@d30g2000prg.googlegroups.com>
Message-ID: <1186304814.129279.207100@j4g2000prf.googlegroups.com>

On Aug 4, 8:25 pm, "mensana... at aol.com" <mensana... at aol.com> wrote:
> On Aug 4, 9:21?pm, "Jim Langston" <tazmas... at rocketmail.com> wrote:
>
>
>
> > <mensana... at aol.com> wrote in message
>
> >news:1186278638.931477.39760 at z24g2000prh.googlegroups.com...
>
> > > On Aug 4, 6:35?pm, SMERSH009 <SMERSH0... at gmail.com> wrote:
> > >> Hi All.
> > >> Let's say I have some badly formatted text called doc:
>
> > >> doc=
> > >> """
> > >> friendid
> > >> Female
>
> > >>                             23 years old
>
> > >>                             Los Gatos
>
> > >>                             United States
> > >> friendid
> > >> Male
>
> > >>                             24 years old
>
> > >>                             San Francisco, California
>
> > >>                             United States
> > >> """
>
> > >> How would I get these results to be displayed in a format similar to:
> > >> friendid;Female;23 years old;Los Gatos;United States
> > >> friendid;Male; 24 years old;San Francisco, California;United States
>
> > >> The latter is a lot easier to organize and can be quickly imported
> > >> into Excel's column format.
>
> > >> Thanks Much,
> > >> Sam
>
> > > d = doc.split('\n')
>
> > > f = [i.split() for i in d if i]
>
> > > g = [' '.join(i) for i in f]
>
> > > rec = []
> > > temprec = []
> > > for i in g:
> > >    if i:
> > >        if i == 'friendid':
> > >            rec.append(temprec)
> > >            temprec = [i]
> > >        else:
> > >            temprec.append(i)
> > > rec.append(temprec)
>
> > > output = [';'.join(i) for i in rec if i]
>
> > > for i in output: print i
>
> > > ##    friendid;Female;23 years old;Los Gatos;United States
> > > ##    friendid;Male;24 years old;San Francisco, California;United States
>
> > also, I would suggest you use CSV format.
>
> Well, the OP asked for a specific format. One is not
> always at liberty to change it.
>
> > CSV stands for "Comma Seperated
> > Variable" and Excel can load such a sheet directly.
>
> And Excel can load the shown format directly also,
> just specify the delimiter.
>
>
>
> > Instead of seperating using ; seperate using ,  Of course, this provides a
> > problem when there is a , in a string.
>
> Which explains the popularity of using tabs as delimiters.
> The data deliverable specification I use at work
> uses the pipe character | which never appears as data
> in this particular application.
>
> > Resolution is to quote the string.
>
> Which makes the file bigger and isn't necessary
> when tabs and pipes are used as delimiters.
>
> > Being such, you can just go ahead and quote all strings.  So you would want
> > the output to be:
>
> > "friendid","Female","23 years old","Los Gatos","United States"
> > "friendid","Male","24 years old","San Francisco, California","United States"
>
> Which I would do if I had a specification that
> demanded it or was making files for others. For my
> own use, I wouldn't bother as it's unnecessary work.
>
>
>
> > Numbers should not be quoted if you wish to treat them as numeric and not
> > text.
>
> A good reason not to use quotes at all. Besides which,
> Excel can handle that also.

Thanks for all your posts guys.
mensanator's was the most helpful, and I only ended up needing to use
a few lines from that code.
The only question that remains for me--and this is just for my
knowledge-- what does the "if i" mean in this code snippet?
f = [i.split() for i in d if i]
How is it helpful to leave a dangling "if i"? Why not just f =
[i.split() for i in d]?

And yes John, this was indeed a "homework question." It was for my
daughter's preschool. You are going to help her ace her beginner
Python class! (No, this was not a homework question).



From aleax at mac.com  Fri Aug 10 11:56:22 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 10 Aug 2007 08:56:22 -0700
Subject: Ipc mechanisms and designs.
References: <1186760055.658942.116300@x40g2000prg.googlegroups.com>
Message-ID: <1i2mgp3.18efp2c12w20wpN%aleax@mac.com>

king kikapu <aboudouvas at panafonet.gr> wrote:

> Hi,
> 
> inspired of the topic "The Future of Python Threading", i started to
> realize that the only way to utilize the power of multiple cores using
> Python, is spawn processes and "communicate" with them.
> 
> If we have the scenario:
> 
> 1. Windows (mainly) development
> 2. Processes are running in the same machine
> 3. We just want to "pass" info from one process to another. Info may
> be simple data types or user defined Python objects.
> 
> what is the best solution (besides sockets) that someone can implement
> so to have 2 actually processes that interchanged data between them ?
> I looked at Pyro and it looks really good but i wanted to experiment
> with a simpler solution.

Check out <http://www.lindaspaces.com/products/NWS_overview.html>


Alex


From steven.bethard at gmail.com  Sun Aug 12 22:56:16 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 12 Aug 2007 20:56:16 -0600
Subject: A dumb question about a class
In-Reply-To: <L-6dndzTXf9qXSLbnZ2dnUVZ_tfinZ2d@comcast.com>
References: <mailman.1887.1186955369.22759.python-list@python.org>
	<TqSdnWYzVdWvGCLbnZ2dnUVZ_saknZ2d@comcast.com>
	<1186965321.741540.108820@k79g2000hse.googlegroups.com>
	<1186966648.867722.185770@19g2000hsx.googlegroups.com>
	<L-6dndzTXf9qXSLbnZ2dnUVZ_tfinZ2d@comcast.com>
Message-ID: <MIKdnb4cUNbPVSLbnZ2dnUVZ_hadnZ2d@comcast.com>

Steven Bethard wrote:
> Dustan wrote:
>> On Aug 12, 7:35 pm, Dustan <DustanGro... at gmail.com> wrote:
>>> On Aug 12, 5:09 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
>>>
>>>>      def iter_primes():
>>>>          # an iterator of all numbers between 2 and +infinity
>>>>          numbers = itertools.count(2)
>>>>          # generate primes forever
>>>>          while True:
>>>>              # get the first number from the iterator (always a prime)
>>>>              prime = numbers.next()
>>>>              yield prime
>>>>              # remove all numbers from the (infinite) iterator that are
>>>>              # divisible by the prime we just generated
>>>>              numbers = itertools.ifilter(prime.__rmod__, numbers)
>>> This is kind of OT (from the thread), but in this iter_primes
>>> function, numbers is becoming an ifilter of an ifilter of an ifilter
>>> of an ifilter of an ifilter of an ifilter of... Is that really at all
>>> efficient for larger numbers (millions or billions, or even bigger)?
>>
>> To word my question better:
>>
>> How does this algorithm compare and contrast to maintaining a
>> dictionary or set and iterating through those structures to find out
>> if a number is divisible? All of those algorithms I've described are
>> O(n^2), if I'm not mistaken, but as far as memory-efficiency and the
>> likes, how do they compare/contrast?
> 
> I don't have the answer off hand, but if anyone wants to report some 
> timeit results or memory consumption here, I'd be interested.

Ok, I played around with it myself.  Here are the two implementations I 
tested::

     def iter_primes_recursive():
         # an iterator of all numbers between 2 and +infinity
         numbers = itertools.count(2)

         # generate primes forever
         while True:

             # get the first number from the iterator (always a prime)
             prime = numbers.next()
             yield prime

             # remove all numbers from the (infinite) iterator that are
             # divisible by the prime we just generated
             numbers = itertools.ifilter(prime.__rmod__, numbers)


     def iter_primes_mapping():

         # mapping from composite number to first prime that revealed
         # that number as a composite
         composite_to_factor_map = {}

         # generate primes forever
         for i in itertools.count(2):

             # find a factor of the number
             factor = composite_to_factor_map.pop(i, None)

             # if no factor is found, the number is prime
             if factor is None:
                 yield i
                 composite_to_factor_map[i * i] = i

             # add the factor to the number until we find a new
             # composite number
             else:
                 composite = i + factor
                 while composite in composite_to_factor_map:
                     composite += factor
                 composite_to_factor_map[composite] = factor

And here are some timeit results::

$ python -m timeit -s "from script import iter_primes_recursive as 
iter_primes" "for i in iter_primes():" "    if i >= 100:"
"        break"
10000 loops, best of 3: 102 usec per loop

$ python -m timeit -s "from script import iter_primes_mapping as 
iter_primes" "for i in iter_primes():" "    if i >= 100:"
"        break"
10000 loops, best of 3: 75.2 usec per loop

$ python -m timeit -s "from script import iter_primes_recursive as 
iter_primes" "for i in iter_primes():" "    if i >= 10000:"
"        break"
10 loops, best of 3: 111 msec per loop

$ python -m timeit -s "from script import iter_primes_mapping as 
iter_primes" "for i in iter_primes():" "    if i >= 10000:"
"        break"
100 loops, best of 3: 8.4 msec per loop

So, somewhat unsurprisingly, the non-recursive version is much faster 
for larger primes. (Someone should check that both my implementations 
are right -- I only did a couple of spot checks on the output.)

STeVe


From Brian.McCann at viziant.net  Thu Aug 23 23:27:33 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Thu, 23 Aug 2007 23:27:33 -0400
Subject: creating a tar file with python
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
	<faktv8$8fs$1@sea.gmane.org>
	<93066C069973ED448DC2BCEA9C44A7383BE2ED@efmailx>
	<46CE4D3D.7020106@holdenweb.com>
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE2EE@efmailx>

 
<mailto:brian.mccann at viziant.net> 
Steve,
 
I ran the code as you suggested, didn't work, tried variations of it didn't work,
If you don't know the answer don't pretend you do!

Apology not accepted, please don't wake up!

Future correspondence on any python questions from you go to trash.
May your pillow not have pity on your head!
 
--Brian
 

________________________________

From: Steve Holden [mailto:steve at holdenweb.com]
Sent: Thu 8/23/2007 11:15 PM
To: Brian McCann
Cc: python-list at python.org
Subject: Re: creating a tar file with python



Brian McCann wrote:
>
> Hi,
> 
> I'm now getting this error
> any ideas?
> Thanks,
> Brian
>
>
> Traceback (most recent call last):
>   File "./tarup.py", line 25, in ?
>     tar = tarfile.open("test.xml","sample.tar.gz", 'w:gz')
>   File "/usr/lib64/python2.4/tarfile.py", line 929, in open
>     raise ValueError, "undiscernible mode"
> ValueError: undiscernible mode
> ############################################################
> #!/usr/bin/python
> import string
> import os
> import sys
> import time
> import errno
> import shutil
> import tarfile
>
> tar = tarfile.open(test.xml","sample.tar.gz", 'w:gz')
> 
Well, my first idea is that you took the time to think beyond the
mistake exhibited in your first response. But since a soft mattress is
currently looking about a hundred times more attractive than actually
trying to debug your code I am sorry to tell you I am going to punt on
this one and trust that some other c.l.py netizen will take pity on you
and probably help you with less crabby comments than me. Good luck!

regards
  Steve
--
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


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From zyzhu2000 at gmail.com  Sat Aug 18 21:43:43 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Sun, 19 Aug 2007 01:43:43 -0000
Subject: "constructor" or initialization function for module
In-Reply-To: <mailman.2155.1187486741.22759.python-list@python.org>
References: <1187484559.935316.125050@j4g2000prf.googlegroups.com>
	<mailman.2155.1187486741.22759.python-list@python.org>
Message-ID: <1187487823.316772.234780@j4g2000prf.googlegroups.com>

On Aug 18, 8:25 pm, Steve Holden <st... at holdenweb.com> wrote:
> beginner wrote:
> > Hi Everyone,
>
> > An extended module (.pyd) written in C have an init function that is
> > called when the module is imported. Does anyone know if there is a way
> > to provide an init function for a module written in python?
>
> The body of a Python module is executed the first time it is imported
> (that's how the functions and classes get defined: class and def
> statements are executable), so just put your initialization code inline.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------

I see. That works.



From martin at v.loewis.de  Sun Aug  5 13:50:56 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 05 Aug 2007 19:50:56 +0200
Subject: Semantics of thread.error
In-Reply-To: <1186333306.599950.139160@e16g2000pri.googlegroups.com>
References: <1186333306.599950.139160@e16g2000pri.googlegroups.com>
Message-ID: <46b60e00$0$18044$9b622d9e@news.freenet.de>

Paul Miller schrieb:
> In the language documentation, all that is said about thread.error is
> that it's raised "on thread-specific errors."  Is there anywhere a
> list of conditions which will cause thread.error to be raised? 

I don't think so. However, it is fairly easy to extract such a list
from the source: "grep ThreadError */*.c" reveals these causes

  PyErr_SetString(ThreadError, "release unlocked lock");
  PyErr_SetString(ThreadError, "can't allocate lock");
  PyErr_SetString(ThreadError, "can't start new thread");
  PyErr_SetString(ThreadError, "no current thread ident");
  PyErr_SetString(ThreadError, "setting stack size not supported");

Regards,
Martin


From lasses_weil at klapptsowieso.net  Fri Aug 31 18:52:23 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Sat, 01 Sep 2007 00:52:23 +0200
Subject: So what exactly is a complex number?
In-Reply-To: <451mq4-les.ln1@ozzie.tundraware.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
Message-ID: <46d89ba9$0$30380$9b4e6d93@newsspool4.arcor-online.net>

Tim Daneliuk wrote:
> A number by itself is called a "scalar".  For example, when I say,
> "I have 23 apples", the "23" is a scalar that just represents an
> amount in this case.
> 
> One of the most common uses for Complex Numbers is in what are
> called "vectors".  In a vector, you have both an amount and
> a *direction*.  For example, I can say, "I threw 23 apples in the air
> at a 45 degree angle".  Complex Numbers let us encode both
> the magnitude (23) and the direction (45 degrees) as a "number".
> 
1. Thats the most creative use for complex numbers I've ever seen. Or 
put differently: That's not what you would normally use complex numbers for.
2. Just to confuse the issue: While complex numbers can be represented 
as 2-dimensional vectors, they are usually considered scalars as well 
(since they form a field just as real numbers do).


> There are actually two ways to represent Complex Numbers.
> One is called the "rectangular" form, the other the "polar"
> form, but both do the same thing - they encode a vector.
> 
Again, that is just one way to interpret them. Complex numbers are not 
vectors (at least no moe than real numbers are).


/W


From silfheed at gmail.com  Tue Aug 21 00:54:45 2007
From: silfheed at gmail.com (Silfheed)
Date: Tue, 21 Aug 2007 04:54:45 -0000
Subject: Adjusting the names of custom exceptions (since raising strings is
	deprecated)
Message-ID: <1187672085.263963.157470@z24g2000prh.googlegroups.com>

Heyas

So this probably highlights my lack of understanding of how naming
works in python, but I'm currently using FailUnlessRaises in a unit
test and raising exceptions with a string exception.  It's working
pretty well, except that I get the deprecation warning that raising a
string exception is going to go away.  So my question is, how do I
mangle the name of my exception class enough that it doesnt stick the
name of the module before the name of the exception?

Namely I'd like to get the following

***
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
MyError: 'oops!'

instead of

***
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
__main__.MyError: 'oops!'

(or even test_thingie.MyError as is usually the case).


Creating a class in a separate file and then doing

***
from module import MyError
raise MyError


still gives

***
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
module.MyError


Anyway, any help appreciated.



From nicoblodow at gmx.net  Fri Aug 17 17:54:08 2007
From: nicoblodow at gmx.net (Nico Blodow)
Date: Fri, 17 Aug 2007 21:54:08 +0000
Subject: Problems with threading in embedded Python
Message-ID: <46C61900.2030500@gmx.net>

Hi all,

I hope this hasn't been brought up before, but if it did i missed it, so 
bear with me please :)
anyway, i'm trying to embed Python into a C program. A sample python 
syript i want to run is as follows:

---SNIP---
import time
import threading

go_on = 1
t = 0

def ProcessMessage():
  print "... ProcessMessage"

def Main():
  global go_on
  print "... Main"
  while go_on:
    ProcessMessage ()
    print "...  ... ",
    time.sleep (0.2)

def Setup():
  global t
  print "... Setup"
  t = threading.Thread (None, Main)
  t.start ()
#  t.join (0)
#  print t.isAlive()

def Shutdown():
  global go_on, t
  go_on = 0
  t.join ()
  print "... Shutdown"

---SNIP---

I call "Setup" from C, which should create a new thread which should 
enter the loop in Main. well, it doesn't :)

It prints "... Setup" and does nothing. when i call Shutdown from C, it 
prints "... Main" , followed by "... Shutdown", and exits...

So it seems to me the python interpreter wants to run the seperate 
thread, but doesn't get time from the scheduler (is that the thing about 
100 opcodes?)
 How can i handle this problem? Do I need to wrap all the Py_Stuff() 
into its own thread? do i need artificial python code that only serves 
the purpose of piling up enough opcodes so that the Main() thread gets 
eventually called?

I hope you can help me, if you need more code (f.ex. the C-code ), i 
will post more :)
(basically I modified the run_func.cc file from the docs, added 
PyEval_InitThreads() and monkeyed around with GIL and 
Acquire/ReleaseLock, but so far i had no luck :)

Cheers, Nico


From nyamatongwe+thunder at gmail.com  Tue Aug 21 08:52:31 2007
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Tue, 21 Aug 2007 12:52:31 GMT
Subject: File Read Cache - How to purge?
In-Reply-To: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
Message-ID: <jeByi.24009$4A1.11024@news-server.bigpond.net.au>

Signal:

> So it seems the file is being cached, however on my system only ~2MB
> of additional memory is used when the program is run. This 2MB of
> memory is released when the script exits.

    You are not measuring the memory used by the cache. This may help:
http://www.microsoft.com/technet/archive/ntwrkstn/reskit/07cache.mspx?mfr=true

> 2. Is there anyway to somehow to take advantage of this "caching" by
> initializing it without reading through the entire file first?

    The Win32 API provides FILE_FLAG_SEQUENTIAL_SCAN (don't know how 
effective this will be for your application) although its probably 
simpler to use a read-ahead thread or overlapped I/O.

> 3. If the answer to #2 is No, then is there a way to purge this
> "cache" in order to get a more accurate result in my routine?  That is
> without having to read another large file first?

http://www.microsoft.com/technet/sysinternals/FileAndDisk/CacheSet.mspx

    Neil


From newsgroups at debain.org  Sun Aug 19 09:15:33 2007
From: newsgroups at debain.org (Samuel)
Date: Sun, 19 Aug 2007 13:15:33 +0000 (UTC)
Subject: Hot subject: a good python editor and/or IDE?
References: <mailman.2162.1187525764.22759.python-list@python.org>
	<fa9fcj$rq9$1@tamarack.fernuni-hagen.de>
Message-ID: <fa9fpl$rq9$2@tamarack.fernuni-hagen.de>

On Sun, 19 Aug 2007 13:08:35 +0000, Samuel wrote:

> $ sudo apt-get install vim

I just realized, this should be

$ sudo apt-get install vim-python

or

$ sudo apt-get install vim-full

-Samuel


From rdm at rcblue.com  Tue Aug 14 08:05:07 2007
From: rdm at rcblue.com (Dick Moores)
Date: Tue, 14 Aug 2007 05:05:07 -0700
Subject: Opinions about this new Python book?
Message-ID: <20070814120526.3196A1E4013@bag.python.org>

I'd appreciate opinions about this new Python book.

Title: Python Power!: The Comprehensive Guide
Author:  Matt Telles
Publisher:  Course Technology
Pub. Date:  Jul 27, 2007
Edition:  1st edition
Binding:  Paperback
Pages:  508
ISBN:  1598631586
List Price:  34.99 USD

The book on the publisher's website: <http://tinyurl.com/2dkhzg>

And at BestBookDeal.com:
< http://www.bestbookdeal.com/book/compare/1598631586>

Thanks,

Dick Moores 



From kw at codebykevin.com  Fri Aug 24 14:11:29 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Fri, 24 Aug 2007 14:11:29 -0400
Subject: GUI and distrubution
In-Reply-To: <1187974418.175783.50860@i38g2000prf.googlegroups.com>
References: <1187974418.175783.50860@i38g2000prf.googlegroups.com>
Message-ID: <92ab7$46cf1f51$4275d90a$11544@FUSE.NET>

anders wrote:

> So how is the preferably way to distribute software written i Python

> My next question is witch is the best GUI to use, also consider
> the delivery question above.
>

These are two of the most-often-asked questions on this list (along with 
"What's the best Python IDE?"). Search the list archives via Google, or 
do a general Google search. Some helpful terms to get you started 
include pyinstaller, py2exe, py2app, Tkinter, wxPython, PyQt, and pyGTK.

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From hniksic at xemacs.org  Tue Aug 21 15:56:18 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Tue, 21 Aug 2007 21:56:18 +0200
Subject: How to optimise this code?
References: <mailman.68.1187711977.32294.python-list@python.org>
	<46CB3635.7050705@biotec.tu-dresden.de>
Message-ID: <87mywk1x25.fsf@mulj.homelinux.net>

Christof Winter <winter at biotec.tu-dresden.de> writes:

> To get rid of the if statements, replace __init__ function with:
>
>      def __init__(self, tc):
>          functionToCall = eval("self.testCase%s" % tc)

Or functionToCall = getattr(self, "testCase" + tc)

eval can introduce unwanted side effects.


From carsten at uniqsys.com  Thu Aug 30 14:34:42 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 30 Aug 2007 14:34:42 -0400
Subject: list index()
In-Reply-To: <1188498073.997168.282420@q5g2000prf.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<1188496588.750629.208100@g4g2000hsf.googlegroups.com>
	<mailman.154.1188497511.28954.python-list@python.org>
	<1188498073.997168.282420@q5g2000prf.googlegroups.com>
Message-ID: <1188498882.3468.66.camel@dot.uniqsys.com>

On Thu, 2007-08-30 at 11:21 -0700, zzbbaadd at aol.com wrote:
> I wish they were not
> getting rid of dict.has_key() in Python 3, which I prefer to IN.

That wish will only come true if you maintain your own fork of Python 3.
has_key() will go away, period. It has been made obsolete by "in", which
is faster and more concise.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From aahz at pythoncraft.com  Fri Aug 10 12:12:53 2007
From: aahz at pythoncraft.com (Aahz)
Date: 10 Aug 2007 09:12:53 -0700
Subject: The Future of Python Threading
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<5i329uF3muir4U1@mid.individual.net>
	<slrnfbou9k.vkb.nick@irishsea.home.craig-wood.com>
Message-ID: <f9i2q5$vl$1@panix3.panix.com>

In article <slrnfbou9k.vkb.nick at irishsea.home.craig-wood.com>,
Nick Craig-Wood  <nick at craig-wood.com> wrote:
>
>This would of course make C extensions more complicated...

It's even worse than that.  One of the goals for Python is to make it
easy to call into random libraries, and there are still plenty around
that aren't thread-safe (not even talking about thread-hot).
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"And if that makes me an elitist...I couldn't be happier."  --JMS


From duncan.booth at invalid.invalid  Tue Aug  7 09:54:21 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 Aug 2007 13:54:21 GMT
Subject: Importing * From a Package
References: <e2a1d0aa0708060706p1f50d5c1j93b6cc3679522597@mail.gmail.com>
	<20070806143253.4947.1097304571.divmod.quotient.19513@ohm>
	<mailman.1712.1186492584.22759.python-list@python.org>
Message-ID: <Xns9985967E56158duncanbooth@127.0.0.1>

"Patrick Doyle" <wpdster at gmail.com> wrote:

> Why does Python include the submodules that were explicitly loaded by
> previous imports?  Does it go out of it's way to do so?  If so, why?
> What purpose does it serve?  Or, is it a natural fallout of the manner
> in which imports are processed?  If so, could somebody guide my
> intuition as to why this would be such a natural fallout?
> 

It is a natural fallout of the manner in which imports are processed. 
When you explicitly load a submodule a reference to the submodule is 
stored in the parent module. When you do 'from module import *' and the 
imported module doesn't define __all__, you create a reference in the 
current module to everything referenced by the imported module (except 
for variables beginning with '_').

Python makes no distinction at all between the objects named in the 
imported module: they all get imported, i.e. assigned into the current 
scope no matter how they got there.

If you use your example:

>>> import SDRGen
>>> dir(SDRGen)
['__builtins__', '__doc__', '__file__', '__name__', '__path__']
>>> from SDRGen.TFGenerator import *
>>> dir(SDRGen)
['TFGenerator', '__builtins__', '__doc__', '__file__', '__name__', 
'__path__']
>>>

The line 'from SDRGen.TFGenerator import *' always creates the name 
TFGenerator in the SDRGen module (and it will create the SDRGen module 
if it has to). A subsequent 'from SDRGen import *' is simply doing the 
equivalent of:

    for name in dir(SDRGen):
       if not name.startswith('_'):
           setattr(current_module, getattr(SDRGen, name))

except of course the variables name and current_module don't exist.


From mhearne808 at gmail.com  Wed Aug  8 12:46:25 2007
From: mhearne808 at gmail.com (mhearne808[insert-at-sign-here]gmail[insert-dot-here]com)
Date: Wed, 08 Aug 2007 16:46:25 -0000
Subject: accessing parts of large files with File.seek()
Message-ID: <1186591585.175399.139850@x40g2000prg.googlegroups.com>

I'm having a problem with the File object's seek() method.
Specifically, I cannot use it to seek to a location in a binary file
that is greater than 2^31 (2147483648).  This seems unnecessarily
limiting, as it is common these days to have files larger than 2 GB.

Is there some LargeFile object out there that I can use to read my
file, which is approximately 3.3 GB in size?

Python version (freshly built from source this morning):
Python 2.5.1 (r251:54863, Aug  8 2007, 09:23:05)
[GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin

Thanks,

Mike



From bdesth.quelquechose at free.quelquepart.fr  Thu Aug  2 10:33:13 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 02 Aug 2007 16:33:13 +0200
Subject: __call__ considered harmful or indispensable?
In-Reply-To: <7xfy31smuq.fsf@ruckus.brouhaha.com>
References: <mailman.1527.1186079415.22759.python-list@python.org>
	<7xfy31smuq.fsf@ruckus.brouhaha.com>
Message-ID: <46b2428b$0$19638$426a74cc@news.free.fr>

Paul Rubin a ?crit :
> skip at pobox.com writes:
> 
>>In this particular case it was clearly unnecessary and just obfuscated the
>>code.  I'm wondering, are there some general cases where __call__ methods of
>>a user-defined class are simply indispensable?
> 
> 
> I don't know about "indispensable" but __call__ is convenient sometimes
> and I do use it.  I've wished that modules supported call, so I could
> say
> 
>     import foo
>     x = foo(3)
> 
> instead of having to say x=foo.foo(3) or something like that.

from foo import foo
x = foo(3)

Or did I miss the point ???


From lasses_weil at klapptsowieso.net  Fri Aug 31 09:18:00 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Fri, 31 Aug 2007 15:18:00 +0200
Subject: Let's Unite Against Jews and Mongrels!
In-Reply-To: <023fd3dhtmb5j0hl2uvdc4f25d5s6vogkp@4ax.com>
References: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
	<1188300284.507909.126770@57g2000hsv.googlegroups.com>
	<46D40BFE.2020301@comcast.net>
	<023fd3dhtmb5j0hl2uvdc4f25d5s6vogkp@4ax.com>
Message-ID: <46d81508$0$4536$9b4e6d93@newsspool3.arcor-online.net>

Barry OGrady wrote:
> He has some wrong ideas. The blacks are victims of the jews as well.
> 

And Jews are the victims of "Christians". And Christians are the victims 
of "Muslims".

Anybody not a victim of anyone else, please raise your hand!

/W


From gagsl-py2 at yahoo.com.ar  Wed Aug  1 23:38:28 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 02 Aug 2007 00:38:28 -0300
Subject: frequency analysis of a DB column
References: <1186021313.413443.184060@i38g2000prf.googlegroups.com>
Message-ID: <op.twexqextx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 01 Aug 2007 23:21:53 -0300, goldtech <goldtech at worldpost.com>  
escribi?:

> In Python 2.1 are there any tools to take a column from a DB and do a
> frequency analysis - a breakdown of the values for this column?
>
> Possibly a histogram or a table saying out of 500 records I have one
> hundred and two "301" ninety-eight "212" values and three-hundred
> "410"?
> Is SQL the way to for this?

I'd start with:

select column, count(column), min(column), max(column)
 from table
group by column
order by count(column) desc

and then build an histogram from that (using PyChart for instance). Based  
on this distribution curve, one can refine the analysis in a lot of ways...

> Of course there'd be 1000's of values....

Should not be a problem for today's DBMS and hardware...

-- 
Gabriel Genellina



From rschroev_nospam_ml at fastmail.fm  Sat Aug 11 10:19:51 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sat, 11 Aug 2007 14:19:51 GMT
Subject: Augmented assignment (was Re: Something in the function tutorial
	confused me.)
In-Reply-To: <f9kdpq$drp$1@panix3.panix.com>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
	<slrnfbk19 <m3hvi.37606$G23.6240@newsreading01.news.tds.net>
	<f9kdpq$drp$1@panix3.panix.com>
Message-ID: <bAjvi.47120$wv5.1434653@phobos.telenet-ops.be>

Aahz schreef:
> In article <m3hvi.37606$G23.6240 at newsreading01.news.tds.net>,
> Neil Cerutti  <horpner at yahoo.com> wrote:
>> On 2007-08-11, Alex Martelli <aleax at mac.com> wrote:
>>> Neil Cerutti <horpner at yahoo.com> wrote:
>>>    ...
>>>> The Python Language Reference seems a little confused about the
>>>> terminology.
>>>>
>>>>   3.4.7 Emulating numeric types
>>>>   6.3.1 Augmented assignment statements
>>>>
>>>> The former refers to "augmented arithmetic operations", which I
>>>> think is a nice terminology, since assignment is not necessarily
>>>> taking place. Then the latter muddies the waters.
>>> Assignment *IS* "necessarily taking place"; if you try the augmented
>>> assignment on something that DOESN'T support assignment, you'll get an
>>> exception.  Consider:
>>>
>>>>>> tup=([],)
>>>>>> tup[0] += ['zap']
>>> Traceback (most recent call last):
>>>   File "<stdin>", line 1, in <module>
>>> TypeError: 'tuple' object does not support item assignment
>>>
>>> Tuples don't support item ASSIGNMENT, and += is an ASSIGNMENT,
>>> so tuples don't allow a += on any of their items.
>>>
>>> If you thought that += wasn't an assignment, this behavior and
>>> error message would be very problematic; since the language
>>> reference ISN'T confused and has things quite right, this
>>> behavior and error message are perfectly consistent and clear.
>> Thanks for the correction. I was under the illusion that sometimes
>> augmented assignment would instead mutate the object.
> 
> Although Alex is essentially correct, the situation is a bit more complex
> and you are correct that augmented assignment allows the object to decide
> whether to mutate in place.  However, the critical part of Alex's point
> is what you need to focus on: it's the *tuple* in Alex's example that
> intercepts the assignment call, not the list contained in the tuple.
> 
> Obviously, you can easily work around it:
> 
>>>> t = ([],)
>>>> l = t[0]
>>>> l += ['foo']
>>>> t
> (['foo'],)

I'm missing something here, I think. As far as I can tell, the language 
reference says that the target is evaluated before the augmented 
assignment is performed. If that's the case, I don't see how the tuple 
in Alex' example has anything to with it: the assignment is to the list, 
not the tuple.

And watch this (Python 2.4.2):

 >>> tup = ([],)
 >>> tup[0] += ['zap']

Traceback (most recent call last):
   File "<pyshell#10>", line 1, in -toplevel-
     tup[0] += ['zap']
TypeError: object does not support item assignment

So far that's the same as Alex' example, but look at the value of the 
tuple now:

 >>> tup
(['zap'],)

Despite the TypeError, the list *has* changed.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From oliver.andrich at gmail.com  Thu Aug 23 13:59:43 2007
From: oliver.andrich at gmail.com (oliver.andrich at gmail.com)
Date: Thu, 23 Aug 2007 17:59:43 -0000
Subject: ctypes and unsigned char*
In-Reply-To: <mailman.152.1187840824.32294.python-list@python.org>
References: <1187545486.797017.308720@a39g2000hsc.googlegroups.com>
	<1187548845.674582.69630@w3g2000hsg.googlegroups.com>
	<1187609450.542644.50430@w3g2000hsg.googlegroups.com>
	<mailman.152.1187840824.32294.python-list@python.org>
Message-ID: <1187891983.131947.128030@l22g2000prc.googlegroups.com>

On 23 Aug., 05:46, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> If the result can contain nul bytes, you have to specify its size
> explicitely (else it will be truncated at the first zero). Use the
> string_at utility function:
>
> result_str = string_at(result, length)
>
> (That should work fine, I presume...)

Thank a lot, that does exactly what I expected it to do.

Best regards,
Oliver



From istvan.albert at gmail.com  Wed Aug  8 10:26:08 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Wed, 08 Aug 2007 14:26:08 -0000
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <7xzm15q8fy.fsf@ruckus.brouhaha.com>
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
Message-ID: <1186583168.447608.114040@d55g2000hsg.googlegroups.com>

On Aug 6, 6:11 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:

> Why on earth did they make this change?  It just seems gratuitous.

Having print a function (with parameters) makes is very easy to modify
where the output goes.

Say you want to have some prints go to one particular file, today you
cannot easily do it, you have to either do a regex based search/
replace or fiddle with the sys.stdout etc. both have substantial
drawbacks.

A solution would be writing the code with a logging function to begin
with, alas many times that is out of one's hand. I wished print was a
function great many times. I bet Guido has had similar experiences,
note that attempt to keep print in the current form but have it print
to a file ... with that crazy syntax, print >>f, ... alas that did not
solve anything

It is time to fix it for good.

i.




From ladynikon at gmail.com  Fri Aug  3 12:11:35 2007
From: ladynikon at gmail.com (Danyelle Gragsone)
Date: Fri, 3 Aug 2007 12:11:35 -0400
Subject: Eclipse/PyDev question.
In-Reply-To: <59f9c5160708030846j5bb2e275u8db95474519b00fe@mail.gmail.com>
References: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>
	<1186153259.372809.230110@d30g2000prg.googlegroups.com>
	<1186153503.806195.225560@g4g2000hsf.googlegroups.com>
	<bfc796de0708030832m16ac29a8se60f84f45cd50bf@mail.gmail.com>
	<59f9c5160708030846j5bb2e275u8db95474519b00fe@mail.gmail.com>
Message-ID: <59f9c5160708030911x3ec2d132oba0fe18c6b2eedc4@mail.gmail.com>

I just found this: http://www.easyeclipse.org/site/distributions/python.html


From daniels at dsl-only.net  Sat Aug 18 00:55:46 2007
From: daniels at dsl-only.net (Scott David Daniels)
Date: Fri, 17 Aug 2007 21:55:46 -0700
Subject: help on object  programing
In-Reply-To: <1187370429.041002.205500@d55g2000hsg.googlegroups.com>
References: <1187370429.041002.205500@d55g2000hsg.googlegroups.com>
Message-ID: <13ccuu4e01vj864@corp.supernews.com>

yadin wrote:
> class big(self):
> ...
> how can i define my variables so that there are valid outside the
> class???

Although you did not describe the issue all that well, I _think_ you
are referring to the fact that the following two pieces of code behave
less like each other than one might suspect.  The previous responders
have missed the confusing part of python in your attempt to present your
confusion.

     def big():
         abc = 7
         print abc
         class small(object):
             print '...'
             print abc
             def __init__(self):
                 print abc
         return small()
     big()

     class Big(object):
         Abc = 13
         print Abc
         class Small(object):
             print '...'
             print Abc
             def __init__(self):
                 print Abc
         cell = Small()
     big()

The explanation is unfortunately a little technical.  The
class-in-a-function (small) is not defined until the function
(big) is actually _called_, not when big is being defined.  The
class-in-a-class (Small) in the second instance is actually
defined _before_ Big is being defined, and the temporary
namespace that contains Abc is hidden while Small is being
defined.

-Scott David Daniels
Scott.Daniels at Acm.Org





From helloizomi at gmail.com  Wed Aug 29 03:26:06 2007
From: helloizomi at gmail.com (helloizomi at gmail.com)
Date: Wed, 29 Aug 2007 07:26:06 -0000
Subject: Running daemon with zdaemon ... example help?
In-Reply-To: <46cfe403$0$21147$7a628cd7@news.club-internet.fr>
References: <1188011052.347321.211890@r23g2000prd.googlegroups.com>
	<46cfe403$0$21147$7a628cd7@news.club-internet.fr>
Message-ID: <1188372366.955787.143600@r23g2000prd.googlegroups.com>

Thank you, I got it now ^.^
On Aug 25, 3:10 pm, asrenzo <t... at titi.de> wrote:
> Hi,
>
> This could also be a good starting point:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731
>
> Regards,
>
> Laurent
>
> Genie T a ?crit :
>
> > Hi all,
>
> > I'm looking atzdaemonto run my python scripts as a daemon but it
> > seems to have few example that guide me how to follow. It would be
> > great if you can give me a simple example of how to use. I'm newbie
> > here :)
>
> > Thanks




From deets at nospam.web.de  Sun Aug 19 14:37:20 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 19 Aug 2007 20:37:20 +0200
Subject: Python on Computation, Math and Statistics
In-Reply-To: <m_%xi.34088$2v1.7394@newssvr14.news.prodigy.net>
References: <m_%xi.34088$2v1.7394@newssvr14.news.prodigy.net>
Message-ID: <5irgvaF3oi5dpU2@mid.uni-berlin.de>

W. Watson schrieb:
> I would hope Python is doing a lot of standard computations beyond 
> arithmetic. Trig functions and more. Comments?

Bad google day?

http://docs.python.org/lib/numeric.html

Additionally, there are several scientific extensions, like SciPy, 
Numeric/Numpy and so forth.


Diez


From nick at craig-wood.com  Wed Aug 29 06:30:08 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 29 Aug 2007 05:30:08 -0500
Subject: tempfile.mkstemp and os.fdopen
References: <1188323759.955043.317630@19g2000hsx.googlegroups.com>
	<Michael.J.Fromberger-8FC07C.15483428082007@localhost>
	<fb37s6$p1s$1@lust.ihug.co.nz>
Message-ID: <slrnfdahbj.aai.nick@irishsea.home.craig-wood.com>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:
>  In message <Michael.J.Fromberger-8FC07C.15483428082007 at localhost>, Michael
>  J. Fromberger wrote:
> 
> > ... since os.fdopen() only has access to the file descriptor, it
> > does not have a convenient way to obtain the file's name.
> 
>  You can do this under Linux as follows:
> 
>      os.readlink("/proc/%d/fd/%d" % (os.getpid(), fileno))

A good idea!  You can write this slightly more succinctly as

  os.readlink("/proc/self/fd/%d" % fileno)

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


From ldo at geek-central.gen.new_zealand  Sat Aug 25 08:41:12 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 26 Aug 2007 00:41:12 +1200
Subject: accessing keys in dict
References: <1187143106.021325.104690@l22g2000prc.googlegroups.com>
Message-ID: <fap7sk$tr0$2@lust.ihug.co.nz>

In message <1187143106.021325.104690 at l22g2000prc.googlegroups.com>,
james_027 wrote:

> is there any difference between ..
> 
> for key in a_dict:
> 
> from
> 
> for key in a_dict.keys():

I'm assuming the former is equivalent to 

    for key in a_dict.iterkeys() :


From gagsl-py2 at yahoo.com.ar  Tue Aug 21 22:56:18 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 21 Aug 2007 19:56:18 -0700
Subject: Chaining programs with pipe
In-Reply-To: <1187743235.124030.321200@l22g2000prc.googlegroups.com>
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
	<1187743235.124030.321200@l22g2000prc.googlegroups.com>
Message-ID: <1187751378.122706.211880@q3g2000prf.googlegroups.com>

On 21 ago, 21:40, Karthik Gurusamy <kar1... at gmail.com> wrote:
> On Aug 21, 3:09 pm, avishay <avish... at yahoo.com> wrote:
>
> > I'm trying to chain two programs with a pipe (the output of one
> > feeding the input of the other). I managed to capture the output and
> > feeding the input of each program independently with popen, but how do
> > I tie them together? Is there a solution that works equally on all
> > platforms?
>
> Not sure on non-unix platforms, but in unix like platforms it's best
> to reuse shell's power.
>
> >>> import commands
> >>> commands.getoutput('ls | wc')

Using the shell is OK but I think the subprocess module is more
portable. This example is on Windows:

import subprocess
subprocess.call("dir /b | sort", shell=True)

~DFDADD.tmp
~DFF71E.tmp
1.bak
1.cmd
1.csv
1.py
1.txt
2.py
2A0B17.dmp [...]

--
Gabriel Genellina



From v.Abazarov at comAcast.net  Fri Aug 17 09:45:18 2007
From: v.Abazarov at comAcast.net (Victor Bazarov)
Date: Fri, 17 Aug 2007 09:45:18 -0400
Subject: best GUI library for vector drawing program
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
Message-ID: <fa48pe$tmv$1@news.datemas.de>

chewie54 wrote:
> What would be the best cross-platform GUI library to use for a vector
> based CAD program ( something like Visio on Windows )   WxWidgets,
> Tk,   PyQt,  Java Swing,  Java SWT,????   I need the capibility to
> draw and edit in a window that looks like a page of paper so WYSIWYG
> is very important,  and I need to save the drawings in vector based
> file formats like PS, EPS,  SVG, as well as image formats like jpg,
> png, and gif.  Also, the images need to be high resolution so that
> they can be pasted into various other programs in Windows OS,  and
> Linux OS,  and the Mac OS.

You might actually consider asking in the 'comp.graphics' hierarchy
instead of the language newsgroups.

V
-- 
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask 




From aleax at mac.com  Sun Aug  5 18:24:38 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 5 Aug 2007 15:24:38 -0700
Subject: Formatting Results so that They Can be Nicely Imported into a
	Spreadsheet.
References: <1186270555.514649.311280@d30g2000prg.googlegroups.com>
	<1186278638.931477.39760@z24g2000prh.googlegroups.com>
	<Avati.40$Tu1.6@newsfe12.lga>
	<1186284359.668342.5880@d30g2000prg.googlegroups.com>
	<1186304814.129279.207100@j4g2000prf.googlegroups.com>
	<1186335656.977681.284240@z24g2000prh.googlegroups.com>
Message-ID: <1i2dpfm.12ys1n8pj8hejN%aleax@mac.com>

mensanator at aol.com <mensanator at aol.com> wrote:
   ...
> Even with the "if i" included, we end up with an
> empty list at the start. This because the first "blank"
> line wasn't blank, it was a space, so it passes the
> "if i" test.

...and you can fix that by changing the test to [... if i.split()].


Alex


From countblabula at yahoo.com  Mon Aug  6 13:17:22 2007
From: countblabula at yahoo.com (Lee Fleming)
Date: Mon, 06 Aug 2007 10:17:22 -0700
Subject: Something in the function tutorial confused me.
In-Reply-To: <slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
Message-ID: <1186420642.112170.78940@w3g2000hsg.googlegroups.com>

On Aug 6, 6:25 am, Neil Cerutti <horp... at yahoo.com> wrote:
Because when the function is called,  the line


>     if y is None: y = []


is executed, binding a brand new empty list to y. This
"rebinding" happens every time the function is called, unless you
provide an argument for y that is not None.

Thanks for the prompt replies. But I am still confused. This is what
confuses me....
The first time you call the function, say with f(23), after the
function ends,
y no longer equals None. Therefore, calling f again, this time like
this f(24),
should make y equal [23,24], because the 'if y == None' test fails, or
at least I think it
fails, because y.append(x) added something that was not equal to None
during the previous call.

Please help me!



From mensanator at aol.com  Sat Aug  4 23:25:59 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sat, 04 Aug 2007 20:25:59 -0700
Subject: Formatting Results so that They Can be Nicely Imported into a
	Spreadsheet.
In-Reply-To: <Avati.40$Tu1.6@newsfe12.lga>
References: <1186270555.514649.311280@d30g2000prg.googlegroups.com>
	<1186278638.931477.39760@z24g2000prh.googlegroups.com>
	<Avati.40$Tu1.6@newsfe12.lga>
Message-ID: <1186284359.668342.5880@d30g2000prg.googlegroups.com>

On Aug 4, 9:21?pm, "Jim Langston" <tazmas... at rocketmail.com> wrote:
> <mensana... at aol.com> wrote in message
>
> news:1186278638.931477.39760 at z24g2000prh.googlegroups.com...
>
>
>
>
>
> > On Aug 4, 6:35?pm, SMERSH009 <SMERSH0... at gmail.com> wrote:
> >> Hi All.
> >> Let's say I have some badly formatted text called doc:
>
> >> doc=
> >> """
> >> friendid
> >> Female
>
> >>                             23 years old
>
> >>                             Los Gatos
>
> >>                             United States
> >> friendid
> >> Male
>
> >>                             24 years old
>
> >>                             San Francisco, California
>
> >>                             United States
> >> """
>
> >> How would I get these results to be displayed in a format similar to:
> >> friendid;Female;23 years old;Los Gatos;United States
> >> friendid;Male; 24 years old;San Francisco, California;United States
>
> >> The latter is a lot easier to organize and can be quickly imported
> >> into Excel's column format.
>
> >> Thanks Much,
> >> Sam
>
> > d = doc.split('\n')
>
> > f = [i.split() for i in d if i]
>
> > g = [' '.join(i) for i in f]
>
> > rec = []
> > temprec = []
> > for i in g:
> >    if i:
> >        if i == 'friendid':
> >            rec.append(temprec)
> >            temprec = [i]
> >        else:
> >            temprec.append(i)
> > rec.append(temprec)
>
> > output = [';'.join(i) for i in rec if i]
>
> > for i in output: print i
>
> > ##    friendid;Female;23 years old;Los Gatos;United States
> > ##    friendid;Male;24 years old;San Francisco, California;United States
>
> also, I would suggest you use CSV format.  

Well, the OP asked for a specific format. One is not
always at liberty to change it.

> CSV stands for "Comma Seperated
> Variable" and Excel can load such a sheet directly.

And Excel can load the shown format directly also,
just specify the delimiter.

>
> Instead of seperating using ; seperate using ,  Of course, this provides a
> problem when there is a , in a string.  

Which explains the popularity of using tabs as delimiters.
The data deliverable specification I use at work
uses the pipe character | which never appears as data
in this particular application.

> Resolution is to quote the string.

Which makes the file bigger and isn't necessary
when tabs and pipes are used as delimiters.

> Being such, you can just go ahead and quote all strings.  So you would want
> the output to be:
>
> "friendid","Female","23 years old","Los Gatos","United States"
> "friendid","Male","24 years old","San Francisco, California","United States"

Which I would do if I had a specification that
demanded it or was making files for others. For my
own use, I wouldn't bother as it's unnecessary work.

>
> Numbers should not be quoted if you wish to treat them as numeric and not
> text.

A good reason not to use quotes at all. Besides which,
Excel can handle that also.



From http  Thu Aug 16 04:16:20 2007
From: http (Paul Rubin)
Date: 16 Aug 2007 01:16:20 -0700
Subject: python socket usage
References: <mailman.2046.1187250159.22759.python-list@python.org>
Message-ID: <7xvebfvqqz.fsf@ruckus.brouhaha.com>

O?uz Yar?mtepe <comp.ogz at gmail.com> writes:
> Is it possible to send a data object like a tuple or a list in socket 
> programming? If so how? It seems with socket module it is only possible to 
> send strings. 

Look into something like pyro or JSON.  Whatever you do, don't use eval.


From flyzone at technologist.com  Mon Aug 13 09:43:51 2007
From: flyzone at technologist.com (Flyzone)
Date: Mon, 13 Aug 2007 06:43:51 -0700
Subject: strftime in python 2.2
Message-ID: <1187012631.102571.94210@w3g2000hsg.googlegroups.com>

I'm trying to make work this code in python 2.2.3:

check=datetime.datetime.today().strftime("%H%M")

but datetime is not supported in that version but just in the later.
I can't upgrade python, too many dependencies in a critical system.
How can i convert that string to have the same result?

Hope someone can help me,
Thanks in advance



From andre.roberge at gmail.com  Thu Aug  2 15:48:39 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: Thu, 02 Aug 2007 19:48:39 -0000
Subject: Determining if file is valid image file
In-Reply-To: <f8tbd6$rnh$1@nemesis.news.tpi.pl>
References: <1186064098.587590.91210@g4g2000hsf.googlegroups.com>
	<1186064275.652416.250540@d55g2000hsg.googlegroups.com>
	<f8sqb8$1t6$1@nemesis.news.tpi.pl>
	<1186065645.879720.27720@q75g2000hsh.googlegroups.com>
	<f8tbd6$rnh$1@nemesis.news.tpi.pl>
Message-ID: <1186084119.574473.153120@d30g2000prg.googlegroups.com>

On Aug 2, 4:25 pm, Jarek Zgoda <jzg... at o2.usun.pl> wrote:
> Andr? napisa?(a):
>
> >>>> Other than installing PIL, is there a "simple" way using Python only
> >>>> to determine if a file is a valid image file?
> >>>> I'd be happy if I could at least identify valid images files for gif,
> >>>> jpeg and png.   Pointers to existing modules or examples would be
> >>>> appreciated.
> >>>> The reason why I'd prefer not using PIL is that I'd like to bundle
> >>>> such a function/module in my app.
> >>>> Andr?
> >>> I should have added: I'm interesting in validating the file *content*
> >>> - not the filename :-)
> >> Is the module imghdr enough for your needs?
>
> > Yes, thanks.
>
> Be aware that broken images (i.e. partially downloaded) in many cases
> pass the imghdr.what() test. This function checks for patterns in files,
> just like "file" utility.
>

That's all I need; I'm not concerned about broken images.  I am
writing a web app and need to prevent someone using redirection to
send malicious content when I'm supposedly loading an image file.  So,
what I plan to do is open the file using urlopen, preload the image
and see if it is valid; if so, I pass it on to the browser.

To find out more, look for "redirect" on the following page (it is the
first occurence of that word)
http://ha.ckers.org/xss.html


> --
> Jarek Zgodahttp://jpa.berlios.de/




From ehsan.khoddam at gmail.com  Sat Aug  4 01:45:17 2007
From: ehsan.khoddam at gmail.com (Ehsan)
Date: Fri, 03 Aug 2007 22:45:17 -0700
Subject: regexp problem in Python
In-Reply-To: <1186180565.489968.310340@j4g2000prf.googlegroups.com>
References: <1186177312.117581.129910@d55g2000hsg.googlegroups.com>
	<1186180565.489968.310340@j4g2000prf.googlegroups.com>
Message-ID: <1186206317.800338.215960@i38g2000prf.googlegroups.com>

On Aug 4, 1:36 am, Dave Hansen <i... at hotmail.com> wrote:
> On Aug 3, 4:41 pm, Ehsan <ehsan.khod... at gmail.com> wrote:
>
> > I want to find "http://www.2shared.com/download/1716611/e2000f22/
> [...]
> > I use this pattern :
> > "http.*?\.(wmv|3gp).*""
>
> > but it returns only 'wmv' and '3gp' instead of "http://www.2shared.com/
> > download/1716611/e2000f22/Jadeed_Mlak14.wmv?
> > tsid=20070803-164051-9d637d11"
>
> > what can I do? what's wrong whit this pattern? thanx for your comments
>
> Just a guess, based on too little information: Try "(http.*?\.(wmv|
> 3gp).*)"
>
> Regards,
>
>    -=Dave

no, it doesn't work



From tamim.shahriar at gmail.com  Tue Aug 21 14:33:01 2007
From: tamim.shahriar at gmail.com (subeen)
Date: Tue, 21 Aug 2007 18:33:01 -0000
Subject: C# and Python
In-Reply-To: <mailman.60.1187702691.32294.python-list@python.org>
References: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>
	<1187699710.839869.32810@57g2000hsv.googlegroups.com>
	<mailman.60.1187702691.32294.python-list@python.org>
Message-ID: <1187721181.391208.145540@g4g2000hsf.googlegroups.com>

On Aug 21, 7:24 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/21/07, Ant <ant... at gmail.com> wrote:
>
> > On Aug 21, 11:01 am, subeen <tamim.shahr... at gmail.com> wrote:
> > > Hi,
> > ...
> > > But I want to write the GUI and number generation program in C#.net.
> > > When the user clicks Quick Sort button, the quicksort.py will be
> > > called and it will sort the numbers.
>
> > Probably worth looking at IronPython, the Python implementation for
> > the .Net platform.
>
> > --
>
> Also Pythonnet (see the recent announce on this ML), which is a
> .NET/CPython bridge and supports embedding CPython as well as calling
> .NET code from CPython.

Thanks everyone for your valuable suggestions. I shall let you know my
status.

Regards,
Subeen.



From ocollioud at gmail.com  Fri Aug 24 07:00:31 2007
From: ocollioud at gmail.com (olive)
Date: Fri, 24 Aug 2007 11:00:31 -0000
Subject: Co-developers wanted: document markup language
In-Reply-To: <87absh6wn6.fsf@wilson.homeunix.com>
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com>
	<87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com>
	<87tzqp77my.fsf@wilson.homeunix.com>
	<7xy7g1if24.fsf@ruckus.brouhaha.com>
	<87mywh717i.fsf@wilson.homeunix.com>
	<1187947900.676122.144490@e9g2000prf.googlegroups.com>
	<87absh6wn6.fsf@wilson.homeunix.com>
Message-ID: <1187953231.106631.174870@q4g2000prc.googlegroups.com>

On 24 ao?t, 12:43, Torsten Bronger <bron... at physik.rwth-aachen.de>
wrote:
> Hall?chen!
>
> olive writes:
> > What about ODF ? (http://www.odfalliance.org/) Isn't it a good
> > competitor ?
>
> I'd be a nice further backend but I doubt that people want to enter
> XML.
>

Why not if the schema is designed toward data entry.

You could then use XSLT to convert to ODF for publishing.

What you need is good structured text editor which hides as much as
possible the underlying XML (or other) format.

Olive.



From michele.simionato at gmail.com  Fri Aug 10 03:36:09 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Fri, 10 Aug 2007 07:36:09 -0000
Subject: is there anybody using __del__ correctly??
Message-ID: <1186731369.073644.158490@z24g2000prh.googlegroups.com>

The title is provocative, of course ;)

However, I was browsing through our codebase here at work and I
noticed a few
usages of __del__ as a resource finalizer (i.e. __del__ just calls a
close
method).

I consider this practice an error, since with __del__
you are never sure that the resource will be released
(http://docs.python.org/ref/customization.html#l2h-175) and anyway
this
should be done with try .. finally or the 'with' statement.

So I got into thinking: "yes, using __del__ as a resource finalizer is
wrong,
but then what are good use cases for it? Let's look at the standard
library and see what people use __del__ for".

So I did, and to my dismay 95% of the __del__ methods in the standard
library
are just calling a close method!!

In particular this happens in the following modules: (Python 2.5 on
Ubuntu):

 zipfile, wave, urllib, close, tarfile, sunau, shelve, httplib, gzip,
 fileinput, dumbdbm, audiodev, aifc, bsddb.dbshelve, tempfile, socket,
 platform, ... (I got tired after this point)

I see one good use case for __del__ in wsgiref.validate: here __del__
prints a warning if the resource is *not* closed explicitely.
Something
similar happens in subprocess and popen2, where __del__ updates the
list
of active processes.

So I am beginning to  wonder if there exists good use cases for
__del__,
apart for debugging/checking purposes. Can you provide some?
Yes, you may take that as a challenge ;)


  Michele Simionato


P.S. BTW, I should mention that if you search comp.lang.python for
__del__
you will find hundreds of people who were bitten by __del__, so I
usually give
advices such as "you should never __del__ in your code". If I am wrong
in
giving this advice, please let me know!

P.P.S. Here and there I hear rumors about deprecating __del__ and
nothing
happens, are there any news about that? Expecially concerning Py3k?



From wildemar at freakmail.de  Mon Aug 27 06:30:29 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Mon, 27 Aug 2007 12:30:29 +0200
Subject: Lists
In-Reply-To: <eb79828c0708261137m60f03484xd17cf3881cd9d7e6@mail.gmail.com>
References: <eb79828c0708261137m60f03484xd17cf3881cd9d7e6@mail.gmail.com>
Message-ID: <46D2A7C5.6030400@freakmail.de>

Lamonte Harris wrote:
> Ok
> a = ['spam', 'eggs', 100, 1234]
>
>
> So basically when I do
> print a[1:-1] 
>
> that will display all the choices in the array besides 0,3 
>
> Slicing was kinda weird, just making sure.
>
And your question is?

/W


From fakeaddress at nowhere.org  Sat Aug 11 04:21:18 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sat, 11 Aug 2007 08:21:18 GMT
Subject: The Future of Python Threading
In-Reply-To: <1186764743.225475.241870@q3g2000prf.googlegroups.com>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<mailman.1826.1186743471.22759.python-list@python.org>
	<1186764743.225475.241870@q3g2000prf.googlegroups.com>
Message-ID: <2kevi.1578$3x.691@newssvr25.news.prodigy.net>

Justin T. wrote:
> True, but Python seems to be the *best* place to tackle this problem,
> at least to me. It has a large pool of developers, a large standard
> library, it's evolving, and it's a language I like :). Languages that
> seamlessly support multi-threaded programming are coming, as are
> extensions that make it easier on every existent platform. Python has
> the opportunity to lead that change.

I have to disagree. A dynamic scripting language, even a great
one such as Python, is not the vehicle to lead an advance of
pervasive threading. The features that draw people to Python
do not play nicely with optimizing multi-core efficiency; they
didn't play all that well with single-core efficiency either.
Python is about making good use of our time, not our machines'
time.

Finer-grain locking sounds good, but realize how many items
need concurrency control. Python offers excellent facilities
for abstracting away complexity, so we programmers do not
mentally track all the possible object interactions at once.
In a real application, objects are more intertwingled than
we realize. Whatever mistakes a Python programmer makes,
the interpreter must protect its own data structures
against all possible race errors.

Run-time flexibility is a key Python feature, and it
necessarily implies that most bindings are subject to
change. Looking at a Python function, we tend to focus on
the named data objects, and forget how many names Python
is looking up at run time. How often do we take and release
locks on all the name-spaces that might effect execution?

The GIL both sucks and rocks. Obviously cores are becoming
plentiful and the GIL limits how we can exploit them. On
the other hand, correctness must dominate efficiency. We
lack exact reasoning on what we must lock; with the GIL,
we err on the side of caution and correctness. Instead of
trying to figure out what we need to lock, we default to
locking everything, and try to figure out what we can
safely release.

[Steve Holden:]
>> Be my guest, if it's so simple.
>>
> I knew somebody was going to say that! I'm pretty busy, but I'll see
> if I can find some time to look into it.

If you want to lead fixing Python's threading, consider
first delivering a not-so-grand but definite
improvement. Have you seen how the 'threading' module
in Python's standard library implements timeouts?


-- 
--Bryan


From osiris43 at gmail.com  Mon Aug 13 14:45:22 2007
From: osiris43 at gmail.com (osiris43 at gmail.com)
Date: Mon, 13 Aug 2007 18:45:22 -0000
Subject: programmatically define a new variable on the fly
In-Reply-To: <1186744111.800625.232730@x40g2000prg.googlegroups.com>
References: <1186697500.024593.303820@x35g2000prf.googlegroups.com>
	<1186744111.800625.232730@x40g2000prg.googlegroups.com>
Message-ID: <1187030722.395857.122190@e9g2000prf.googlegroups.com>

> Anyway, I don?t see the point in this. Why don?t you just use
> something like X['g'] instead?

While it's not what the original author is intending, it seems to me
that dynamically adding fields could be useful when something like a
database schema changed frequently.  For example, a row in a database
might contain data related to a customer and I would think it might be
useful to do something like this (where data is a dictionary created
from the column names and row data):

class Customer:
  def __init__(self, data):
    for col_name, value in data.iteritems():
      setattr(self, col_name, value)

Alternatively, you could just assign the original dictionary to a
field on Customer called data and then access it by key:

class Customer:
  def __init__(self, data):
    self.customerData = data

I'm pretty new to Python so it's entirely possible I'm doing things
the hard way but if you had behavior on a class, I can see where
dynamically creating fields on it would be useful.




From aleax at mac.com  Sun Aug 19 14:09:42 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 19 Aug 2007 11:09:42 -0700
Subject: Sorting a list of Unicode strings?
References: <1187542237.139346.6910@o80g2000hse.googlegroups.com>
	<46C87772.2010603@web.de>
	<1187543116.941243.200960@r34g2000hsd.googlegroups.com>
Message-ID: <1i338vd.1kisqttkij0d9N%aleax@mac.com>

oliver at obeattie.com <oliver at obeattie.com> wrote:
   ...
> > > Maybe I'm missing something fundamental here, but if I have a list of
> > > Unicode strings, and I want to sort these alphabetically, then it
> > > places those that begin with unicode characters at the bottom.
   ...
> Anyway, I know _why_ it does this, but I really do need it to sort
> them correctly based on how humans would look at it.

Depending on the nationality of those humans, you may need very
different sorting criteria; indeed, in some countries, different sorting
criteria apply to different use cases (such as sorting surnames versus
sorting book titles, etc; sorry, I don't recall specific examples, but
if you delve on sites about i18n issues you'll find some).

In both Swedish and Danish, I believe, A-with-ring sorts AFTER the
letter Z in the alphabet; so, having ?aland (where I'm using Aa for
A-with-ring, since this newsreader has some problem in letting me enter
non-ascii characters;-) sort "right at the bottom", while it "doesn't
look right" to YOU (maybe an English-speaker?) may look right to the
inhabitants of that locality (be they Danes or Swedes -- but I believe
Norwegian may also work similarly in terms of sorting).

The Unicode consortium does define a standard collation algorithm (UCA)
and table (DUCET) to use when you need a locale-independent ordering; at
<http://jtauber.com/blog/2006/01/27/python_unicode_collation_algorithm>
you'll be able to obtain James Tauber's Python implementation of UCA, to
work with the DUCET found at
<http://jtauber.com/blog/2006/01/27/python_unicode_collation_algorithm>.

I suspect you won't like the collation order you obtain this way, but
you might start from there, subsetting and tweaking the DUCET into an
OUCET (Oliver Unicode Collation Element Table;-) that suits you better.

A simpler, rougher approach, if you think the "right" collation is
obtained by ignoring accents, diacritics, etc (even though the speakers
of many languages that include diacritics, &c, disagree;-) is to use the
key=coll argument in your sorting call, passing a function coll that
maps any Unicode string to what you _think_ it should be like for
sorting purposes.  The .translate method of Unicode string objects may
help there: it takes a dict mapping Unicode ordinals to ordinals or
string (or None for characters you want to delete as part of the
translation).

For example, suppose that what we want is the following somewhat silly
collation: we only care about ISO-8859-1 characters, and want to ignore
for sorting purposes any accent (be it grave, acute or circumflex),
umlauts, slashes through letters, tildes, cedillas.  htmlentitydefs has
a useful dict called codepoint2name that helps us identify those "weirdy
decorated foreign characters".

def make_transdict():
    import htmlentitydefs
    cp2n = htmlentitydefs.codepoint2name
    suffixes = 'acute crave circ uml slash tilde cedil'.split()
    td = {}
    for x in range(128, 256):
        if x not in cp2n: continue
        n = cp2n[x]
        for s in suffixes:
            if n.endswith(s):
                td[x] = unicode(n[-len(s)])
                break
    return td

def coll(us, td=make_transdict()):
    return us.translate(td)

listofus.sort(key=coll)


I haven't tested this code, but it should be reasonably easy to fix any
problems it might have, as well as making make_transdict "richer" to
meet your goals.  Just be aware that the resulting collation (e.g.,
sorting a-ring just as if it was a plain a) will be ABSOLUTELY WEIRD to
anybody who knows something about Scandinavian languages...!!!-)


Alex


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Aug 12 19:04:34 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 13 Aug 2007 01:04:34 +0200
Subject: wxPython - drawing without paint event
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
	<1186738813.373909.96230@x35g2000prf.googlegroups.com>
	<1186796567.331348.42450@q3g2000prf.googlegroups.com>
	<5i5l0dF2lortaU1@mid.individual.net>
	<1186883988.585048.16590@m37g2000prh.googlegroups.com>
	<5i8befF3o5no1U1@mid.individual.net>
	<1186928595.014008.61950@b79g2000hse.googlegroups.com>
	<5i98bsF3nmbavU1@mid.individual.net>
	<1186951326.218981.17820@b79g2000hse.googlegroups.com>
Message-ID: <5i9i02F3m55igU1@mid.individual.net>

7stud wrote:
> On Aug 12, 2:20 pm, Bjoern Schliessmann <usenet-

>> But any suggestions what's
>> better for a beginner? The (incomplete) tutorial surely not.

> Another GUI toolkit.

So it seems your dislike is not for the book, but for the toolkit. 

Regards,


Bj?rn

-- 
BOFH excuse #414:

tachyon emissions overloading the system



From bj_666 at gmx.net  Sat Aug 11 05:59:57 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 11 Aug 2007 09:59:57 GMT
Subject: python 2.5 bug
References: <1186825286.493878.80380@l70g2000hse.googlegroups.com>
Message-ID: <5i5fktF3ml00gU1@mid.uni-berlin.de>

On Sat, 11 Aug 2007 02:41:26 -0700, vedrandekovic wrote:

> I was install Python 2.5 and uninstall Python 2.4 now I cannot run my
> scripts, only from idle
> 
> What should I do?

Install 2.4 again.  Both can be installed in parallel.

Ciao,
	Marc 'BlackJack' Rintsch


From codemania at gmail.com  Fri Aug 31 08:49:49 2007
From: codemania at gmail.com (codemania)
Date: Fri, 31 Aug 2007 05:49:49 -0700
Subject: How to use "Resource Editor" in wxPython ?
Message-ID: <1188564589.573864.86980@x40g2000prg.googlegroups.com>

Disappointing me extremely, with the "generate python" function within
Resource Editor, I only get a segment of python code which load
xrc(xml format) file, rather than real python code in which I could
append my own code.

Does that mean RE(Resource Editor) is of little use?

I hope not, maybe the way I use it is wrong? Tell me please.



From pablo.yabo at gmail.com  Mon Aug 13 13:42:09 2007
From: pablo.yabo at gmail.com (Pablo Yabo)
Date: Mon, 13 Aug 2007 14:42:09 -0300
Subject: C++ Binding with Threads
Message-ID: <db6698600708131042w24064ddxfa812032d0645b4f@mail.gmail.com>

Hello,

I want to embed Python in an application and use an API of the application
from Python.
The application uses a library that creates several threads and I the users
of the application will write Python scripts handling this events.

The problem is that I having problems with threads. I saw that I have to
PyEval_InitThreads and then PyThreadState_New and PyThreadState_Swap from
the new thread but this way to solve the problem doesn't work for me because
I need to let 2 or more threads run at the SAME time.
The interpreter lock doesn't let them run at the same time so I'm looking
for another solution. I saw Py_NewInterpreter and I tried to use it but it
doesn't work if I don't keep the lock.

Can anyone help me to solve this issue or tell me 'Forget it!'?


Thanks on advance,
Pablo Yabo
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From arkanes at gmail.com  Tue Aug  7 09:42:43 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 7 Aug 2007 08:42:43 -0500
Subject: Tkinter or wxpython?
In-Reply-To: <7xy7gopafk.fsf@ruckus.brouhaha.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
	<mailman.1680.1186416061.22759.python-list@python.org>
	<7x3aywr4tc.fsf@ruckus.brouhaha.com>
	<mailman.1684.1186422197.22759.python-list@python.org>
	<7x8x8oqy17.fsf@ruckus.brouhaha.com>
	<mailman.1694.1186433048.22759.python-list@python.org>
	<7xy7gopafk.fsf@ruckus.brouhaha.com>
Message-ID: <4866bea60708070642t755e8a0do27ab4f66ca4724dc@mail.gmail.com>

On 06 Aug 2007 15:25:51 -0700, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> "Chris Mellon" <arkanes at gmail.com> writes:
> > You repeatedly have used the word "slickness" as a pejorative. I find
> > that offensive and it's insulting to users. When I write applications,
> > I want the interface to be as smooth and trouble free as possible,
>
> It's a perjorative when it's done for its own sake and doesn't really
> help the user.  This happens a lot.  When it helps the user, as it
> sometimes does, then it's not perjorative.
>

To me, "slick" means well lubricated and smooth. It means that there
are no rough spots in your interaction. I use the term "flash" for
cosmetic features.

> > As a matter of time spent in development, I do not find that
> > non-trivial UIs are significantly easier to develop using web
> > interfaces.
>
> That's possibly true, but a lot of the time, trivial interfaces are
> enough.  Look at Google search, one of the most complex apps ever
> built (tens or hundreds of MLOC, massive distributed crawler
> infrastructure, 100's of PhD's figuring out the algorithms, etc.) but
> its interface is simple HTML that you would probably call trivial.  It
> is quite possibly the most popular application in the world.
>

When you start talking about trivializing the interface, what you're
actually talking about is trivializing the *process*. The UI is just a
mechanism for interaction. If you have complex interactions, then you
need complex UI (or your users have to do a lot of manual steps).

Search is a good example of trivial interaction. It's not really the
common case, though - in a regular web browser there's a half dozen
minimal points of interaction, and some of them are fairly
complicated. In terms of man-hours spent, raw data entry is one of the
largest cases of human-computer interaction and it's a significantly
more complex interface than search.

As you point out, the complexity of the interaction is only loosely
coupled to the complexity of the application itself, and the art of
designing simple interactions with complex systems is one of the
hallmarks of good design. Apple is generally quite good at this. Note
even so that simple interactions can have or require rather
complicated UI metaphors. Drag and drop is a very visceral, intuitive
interface (it's the second thing my 4 year old figured out how to do,
button clicking was the first) but it's quite complicated to
implement.

I rather suspect that Google has rather more complicated internal
administrative and reporting interfaces for the search engine, too.

> > As a matter of respect for the user, I'm not going to tell them to use
> > a trivial UI if a non-trivial one will save them time, learning
> > effort, or frustration. In order to make this decision, I like to work
> > with the people actually using it and watch them at work. To see what
> > kind of extra steps they have to take and where I can save them time
> > or inaccuracy or frustration.
>
> Right.  Obviously this has to be decided according to the specific
> needs of the application.  A lot of times, trivial interfaces are
> easier to learn than nontrivial ones, precisely because they are
> trivial so there is less to learn.  Again look at Google search for an
> example.
>
> Also, at least for in-house applications, while the user's time counts
> (since their time costs your customer money), your development time
> and deployment effort also costs money that comes from exactly the
> same place, so you have to take into consideration the number of
> users, amount of time they will spend using the program, just how much
> of that time (if any) a fancier interface will save, etc.

Business constraints are always there in software development. You
don't get enough testing, you don't have access to representative test
data, you don't have direct user feedback. And of course the guy
signing the checks, who often isn't the guy using the application, may
decide that an hour of your time isn't worth 100 hours aggravation
from his minimum wage data entry folks. But *I* care about that 100
hours and to the greatest extent possible within my ability and
contract, I will minimize that burden on them.


From larry.bates at websafe.com  Wed Aug 15 14:58:34 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 15 Aug 2007 13:58:34 -0500
Subject: encrypting files + filestreams?
In-Reply-To: <1187186797.579680.206820@19g2000hsx.googlegroups.com>
References: <1187186797.579680.206820@19g2000hsx.googlegroups.com>
Message-ID: <w6idnX2EeuBK0V7bnZ2dnUVZ_rLinZ2d@comcast.com>

per9000 wrote:
> Hi python people,
> 
> I am trying to figure out the best way to encrypt files in python.
> 
> I've build a small script (see below) that encrypts the ubuntu 7.04
> iso file in 2 minutes (I like python :) ).
> 
> But I have some thoughts about it. By pure luck (?) this file happened
> to be N*512 bytes long so I do not have to add crap at the end - but
> on files of the size N*512 + M (M != 521) I will add some crap to make
> it fit in the algorithm. When I later decrypt I will have the stuff I
> do not want. How do people solve this? (By writing the number of
> relevant bytes in readable text in the beginning of the file?)
> 
> Also I wonder if this can be solved with filestreams (Are there
> streams in python? The only python file streams I found in the evil
> search engine was stuff in other forums.)
> 
> 
> Other comments are of course also welcome,
> Per
> 
> 
> # crypto_hardcoded.py starts here
> 
> from Crypto.Cipher import AES
> 
> def encrypt2(cryptor, infile, outfile):
>     """enly encrypt a few bytes at a time"""
> 
>     size = 512
>     bytes = infile.read(size)
> 
>     seek = 0
>     interval = 97
>     ctr = 0
> 
>     while len(bytes) == size:
>         seek += size
>         if ctr % interval == 0:
>             print '\r%15d bytes completed' %  (seek),
>         ctr += 1
> 
>         outfile.write(cryptor.encrypt(bytes))
>         # change to this to decrypt
>         # outfile.write(cryptor.decrypt(bytes))
>         bytes = infile.read(size)
> 
>     if len(bytes) != 0:
>         bytes += "#" * (size - len(bytes))
>         outfile.write(cryptor.encrypt(bytes))
>         seek += len(bytes)
> 
>     print '\r%15d bytes completed' %  (seek)
> 
> if __name__ == "__main__":
>     crptz = AES.new("my-secret_passwd")
>     ifile = file('/tmp/ubuntu-7.04-desktop-i386.iso','r')
>     ofile = file('/tmp/ubuntu-7.04-desktop-i386.iso.out','w')
> 
>     encrypt2(crptz, ifile, ofile)
>     ifile.close()
>     ofile.close()
> 
> # crypto_hardcoded.py ends here
> 

Padding and keeping information in a header is how I solved the problem.

-Larry


From not at given.net  Thu Aug 30 04:30:50 2007
From: not at given.net (mr_gadget)
Date: Thu, 30 Aug 2007 04:30:50 -0400
Subject: Python doesn't see the directories I create
Message-ID: <ldvBi.293202$LE1.92748@newsfe13.lga>

When I create a subfolder, python is not seeing it. Can someone please 
explain this behaviour ? I just started with python, read the tutorial over 
the weekend and am writing my very first script. So I may not be seeing 
something. Both os.path and glob.glob seem not to see a folder I created. 
Other sibling folders seem to work fine. On a whim I tried paths with \\ 
double slashes and that worked. But why should single slashes work for some 
folders and not for others ??

What I need is to match a bunch of files in a folder with 
glob.glob(C:\enhancement\rawfiles\*.bin.gz) and send them to a function that 
unzips them. But I always get []. Yes the folder does have my files, and I 
checked all permissions etc, everything looks identical to the other folders 
which python IS seeing. Same problem on my vista pc too.

Behaviour reproduced below.

C:\Enhancement>dir /ad

 Volume in drive C has no label.

 Volume Serial Number is 8056-41E7

 Directory of C:\Enhancement

08/28/2007  06:15 PM    <DIR>          .

08/28/2007  06:15 PM    <DIR>          ..

08/28/2007  06:07 PM    <DIR>          BSA Documentation

08/28/2007  05:56 PM    <DIR>          output

08/29/2007  07:08 PM    <DIR>          rawfiles

08/23/2007  04:38 PM    <DIR>          SnapCell2.3.2

08/28/2007  06:15 PM    <DIR>          test

               0 File(s)              0 bytes

               7 Dir(s)  35,703,283,712 bytes free

C:\>python -V

Python 2.5.1

C:\>python -c "import os; print os.path.exists('C:\enhancement\output')"

True

C:\>python -c "import os; print os.path.exists('C:\enhancement\rawfiles')"

False

C:\>python -c "import os; print os.path.exists('C:\\enhancement\\rawfiles')"

True

C:\>python -c "import glob; print glob.glob('C:\enhancement\rawfiles\*')"

[]

C:\>python -c "import os; print os.path.exists('C:\enhancement\test')"

False

C:\>python -c "import os; print 
os.path.exists('C:\enhancement\snapcell2.3.2')"

True




From rodrigo.cr at gmail.com  Mon Aug 20 21:03:22 2007
From: rodrigo.cr at gmail.com (rodrigo)
Date: Tue, 21 Aug 2007 01:03:22 -0000
Subject: Retrieving a variable's name.
Message-ID: <1187658202.236626.93600@50g2000hsm.googlegroups.com>

How would I go about retrieving a variable's name (not its value)? I
want to write a function that, given a list of variables, returns  a
string with each variable's name and its value, like:

a: 100
b: 200

I get the feeling this is trivial, but I have been unable to find an
answer on my own.

Thanks,

Rodrigo



From gnewsg at gmail.com  Thu Aug 23 17:57:25 2007
From: gnewsg at gmail.com (billiejoex)
Date: Thu, 23 Aug 2007 14:57:25 -0700
Subject: Impersonate another user temporarily (Unix and Windows)
In-Reply-To: <mailman.207.1187904032.32294.python-list@python.org>
References: <1187809798.274511.230240@z24g2000prh.googlegroups.com>
	<mailman.161.1187858227.32294.python-list@python.org>
	<1187866104.967297.324650@j4g2000prf.googlegroups.com>
	<mailman.166.1187867611.32294.python-list@python.org>
	<1187895663.991360.224830@x40g2000prg.googlegroups.com>
	<mailman.207.1187904032.32294.python-list@python.org>
Message-ID: <1187906245.063301.15980@z24g2000prh.googlegroups.com>

On 23 Ago, 23:20, Steve Holden <st... at holdenweb.com> wrote:
> billiejoex wrote:
> > On 23 Ago, 13:13, "Chris Mellon" <arka... at gmail.com> wrote:
> [...]
> >> Note that running your process as a user with enough priviledges to
> >> impersonate another user pretty much eliminates all the benefits of
> >> running as a low-priviledged user in the first place. Consider
> >> re-thinking your application model and having an "ftp" user instead.- Nascondi testo tra virgolette -
>
> >> - Mostra testo tra virgolette -
>
> > Could you be more precise?
> > Why it's not a good idea?
> > I was thinking of starting ftpd as limited user ('nobody'/'ftp' on
> > unix, 'Guest' on Windows), then temporary switching to another user
> > when I got to perform actions on file system.
> > Maybe you're saying that as limited user I can't do such switching?
>
> That's exactly what he's saying.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------- Nascondi testo tra virgolette -
>
> - Mostra testo tra virgolette -

Uhm... I'm confused.
Which kind of aproach is generally adopted in such cases?



From tenax.raccoon at gmail.com  Wed Aug  8 12:47:52 2007
From: tenax.raccoon at gmail.com (Jason)
Date: Wed, 08 Aug 2007 16:47:52 -0000
Subject: 'Advanced' list comprehension? query
In-Reply-To: <1186588812.006107.185570@o61g2000hsh.googlegroups.com>
References: <1186588812.006107.185570@o61g2000hsh.googlegroups.com>
Message-ID: <1186591672.972638.220740@b79g2000hse.googlegroups.com>

On Aug 8, 10:00 am, pyscottish... at hotmail.com wrote:
> Hi,
>
> I'm playing around with list comprehension, and I'm trying to find the
> most aesthetic way to do the following:
>
> I have two lists:
>
> noShowList = ['one', 'two', 'three']
>
> myList = ['item one', 'item four', 'three item']
>
> I want to show all the items from 'myList' that do not contain any of
> the strings in 'noShowList'.
>
> i.e. 'item four'
>
> I can do it like this:
>
> def inItem(noShowList, listitem):
>     return [x for x in noShowList if x in listitem]
>
> print [x for x in myList if not inItem(noShowList, x)]
>
> and I can do it (horribly) with:
>
> print [x for x in myList if not (lambda y, z:[i for i in y if i in z])
> (noShowList, x)]
>
> I can also print out the items that DO contain the 'noShowList'
> strings with:
>
> print [x for x in myList for y in noShowList if y in x]
>
> but I can't get the 'not' bit to work in the above line.
>
> Any ideas?
> Thanks!

Here's how I would do it:

>>> noShowList
['one', 'two', 'four']
>>> myList
['item one', 'item two', 'item three', 'item four', 'item five']
>>> [x  for x in myList  if not any(y in x  for y in noShowList)]
['item three', 'item five']
>>>

  --Jason



From ldo at geek-central.gen.new_zealand  Mon Aug 27 07:40:19 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 27 Aug 2007 23:40:19 +1200
Subject: non-blocking communication with imaplib
References: <xjv8x84dm33.fsf@oinn.ifi.uio.no>
Message-ID: <faud2f$5cn$1@lust.ihug.co.nz>

In message <xjv8x84dm33.fsf at oinn.ifi.uio.no>, Igor V. Rafienko wrote:

> I would like to talk to an IMAP-server, imaplib being the tool of
> choice, of course. Unfortunately it may happen that the IMAP-server
> fails to respond to certain commands, and I would like to be able to
> detect that within a given time period (on the scale of 5-10 seconds).
> 
> Initially, I thought about playing with setsockblocking() for the
> communication socket in the imaplib.IMAP4 object. However, the IMAP4
> object uses a file object ("created from" the said socket), and the
> underlying socket must be blocking according to [1].
>
> [1] <http://docs.python.org/lib/socket-objects.html#l2h-3693>

According to the documentation
<http://docs.python.org/lib/imap4-objects.html>, you can override
the "read" and "readline" methods. How about replacing them with routines
that use select.select on the socket() object to implement a timeout?


From rdmoores at gmail.com  Sun Aug 12 09:26:09 2007
From: rdmoores at gmail.com (Dick Moores)
Date: Sun, 12 Aug 2007 06:26:09 -0700
Subject: Puzzled by "is"
In-Reply-To: <87ir7l5bv4.fsf@benfinney.id.au>
References: <20070809194105.39BD11E400A@bag.python.org>
	<f9frbl$dps$1@sea.gmane.org>
	<mailman.1814.1186692638.22759.python-list@python.org>
	<87zm1042f0.fsf@benfinney.id.au>
	<mailman.1839.1186768658.22759.python-list@python.org>
	<87ir7l5bv4.fsf@benfinney.id.au>
Message-ID: <d71c7ed60708120626y6d9a9edcnf007a5273de125cc@mail.gmail.com>

On 8/12/07, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
>
> Dick Moores <rdm at rcblue.com> writes:
>
> > At 06:13 PM 8/9/2007, Ben Finney wrote:
> > >it's entirely left to the language implementation which
> > >optimisation trade-offs to make, and the language user (that's you
> > >and I) should *not* expect any particular behaviour to hold between
> > >different implementations.
> >
> > I'm not clear on the meaning of "implementations" here.  Would 2.5
> > for Windows, Mac, Linux all be different implementations? Would Iron
> > Python be another? ActivePython?
>
> For the purpose of the above statement, you should consider even the
> same Python on two different machines to be "different
> implementations". As a programmer writing Python code, you should not
> expect any "implementation-dependent" behaviour to operate in any
> particular way.


So would a programmer EVER use "is" in a script?

Dick
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From listserver at tdw.net  Sat Aug 18 11:37:42 2007
From: listserver at tdw.net (Tim Williams)
Date: Sat, 18 Aug 2007 16:37:42 +0100
Subject: clarification
In-Reply-To: <B81430590.472.56749.2@mxextra>
References: <B81430590.472.56749.2@mxextra>
Message-ID: <9afea2ac0708180837q28fa3197je4d19874d9ae9aa5@mail.gmail.com>

On 17/08/07, Beema shafreen <beema.shafreen at gmail.com> wrote:
> hi everybody,
> i have a file with data separated by tab
> mydata:
> fhl1    fkh2
> dfp1    chk1
> mal3    alp14
> mal3    moe1
> mal3    spi1
> mal3    bub1
> mal3    bub3
> mal3    mph1
> mal3    mad3
> hob1    nak1
> hob1    wsp1
> hob1    rad3
> cdr2    cdc13
> cdr2    cdc2
> shows these two are separated by tab represented as columns
> i have to check the common data between these two coloumn1 an coloumn2
> my code:
> data = []
> data1 = []
> result = []
> fh = open('sheet1','r')
> for line in fh.readlines():
>         splitted = line.strip().split('\t')
>         data.append(splitted[0])
>         data1.append(splitted[1])
>         for k in data:
>                 if k in data1:
>                         result.append(k)
>                         print result
> fh.close()
>
> can you tell me problem with my script and what should is do for this

For a start, you are iterating k in data  *everytime* you iterate a
line in fh  which will give you a speed issue and give you duplicates
in the result.  The following is probably what you intended to do

> for line in fh.readlines():
>         do stuff
> for k in data:
>         do stuff

.split()  splits by spaces, newlines AND tabs so you just need

> splitted = line.split()

eg

>>> ln = 'fhl1\tfkh2\r\n'
>>> ln.split()
['fhl1', 'fkh2']

I think I would have done something like this (not tested)

Input = open('sheet1').read().split()
data = set(Input[::2])
data1 = set (Input[1::2])
result = data.intersection(data1)

or even this (if you don't need data and data1 later in the code)

Input = open('sheet1').read().split()
result = set(Input[::2]).intersection(set (Input[1::2]))


HTH :)


From rjp at ca.inter.net  Fri Aug 10 12:40:41 2007
From: rjp at ca.inter.net (rjp at ca.inter.net)
Date: Fri, 10 Aug 2007 09:40:41 -0700
Subject: (Re)announcing APL 2007
In-Reply-To: <1186406430.744134.298400@x35g2000prf.googlegroups.com>
References: <5hnkb3F3hus4jU1@mid.individual.net>
	<1186406430.744134.298400@x35g2000prf.googlegroups.com>
Message-ID: <1186764041.534462.156660@e9g2000prf.googlegroups.com>

On Aug 6, 9:20 am, Paul Mansour <p... at carlislegroup.com> wrote:

> APL2007 Roll Call: Is anyone going to this?
>
> I'm thinking about going, but I don't want to the only one to show up,
> as in San Diego.

Here here.

Sorry to mention the elephant in the room, but this discussion begs
the obvious question:  what is the rationale for putting on this
conference?  Perhaps I missed that discussion, and if so, please
excuse me.

As we know, there are already two well-attended APL vendor conferences
in the world each year, plus several other more local gatherings.

Speaking as an APL consultant and product distributor, this puts
people in a tough spot, since we now have at least three events to
consider travelling to and attending (assuming APL2000 is hosting its
usual Florida event this year?).

I suppose I should be happy for another opportunity to meet and
network with potential APL colleagues and customers, but if it's
mainly the same small audience at each event, the costs are hard to
justify more than once per year.

I don't have any answers to this dilemma yet, but I think it requires
a lot more discussion. Just putting on a conference and hoping people
attend may, at this point I think, be somewhat counterproductive.

...richard




From jzgoda at o2.usun.pl  Thu Aug  2 17:20:36 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Thu, 02 Aug 2007 23:20:36 +0200
Subject: Determining if file is valid image file
In-Reply-To: <mailman.1537.1186087010.22759.python-list@python.org>
References: <1186064098.587590.91210@g4g2000hsf.googlegroups.com><1186064275.652416.250540@d55g2000hsg.googlegroups.com><f8sqb8$1t6$1@nemesis.news.tpi.pl><1186065645.879720.27720@q75g2000hsh.googlegroups.com>	<f8tbd6$rnh$1@nemesis.news.tpi.pl>
	<mailman.1537.1186087010.22759.python-list@python.org>
Message-ID: <f8ti4d$lo9$1@nemesis.news.tpi.pl>

Terry Reedy napisa?(a):

>>>>> Other than installing PIL, is there a "simple" way using Python only
>>>>> to determine if a file is a valid image file?
> [...]
>> Be aware that broken images (i.e. partially downloaded) in many cases
>> pass the imghdr.what() test.
> 
> To put it another way, the only way to determine whether a coded file is 
> valid may be to decode it.  And even then, it may be corrupted in the sense 
> that the decoded version may have artifacts not in the original.  I have 
> seen the latter both in jpeg images and movie DVDs.

That's what I mean, images that cann't be read using PIL sometimes are
recognized by imghdr.what(), as it happens with "file" too - both of
these tools are the identification (not validation) utilities. To be
sure the image is "really valid", you have to use some image
manipulation program (or library), like ImageMagick (or PIL). Sometimes
imghdr.what() is enough, sometimes you need more. ;)

-- 
Jarek Zgoda
http://jpa.berlios.de/


From arkanes at gmail.com  Wed Aug  8 11:26:51 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 8 Aug 2007 10:26:51 -0500
Subject: Seek the one billionth line in a file containing 3 billion lines.
In-Reply-To: <46B9DFCE.7000505@holdenweb.com>
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
	<7xzm12o7o7.fsf@ruckus.brouhaha.com>
	<1186555297.877273.40540@o61g2000hsh.googlegroups.com>
	<874pja70p5.fsf@benfinney.id.au>
	<4866bea60708080658l170bd9eevd86cf58dbc1eddd8@mail.gmail.com>
	<46B9DFCE.7000505@holdenweb.com>
Message-ID: <4866bea60708080826q11889e41need605dc2ac2a0c4@mail.gmail.com>

On 8/8/07, Steve Holden <steve at holdenweb.com> wrote:
> Chris Mellon wrote:
> > On 8/8/07, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> >> Sullivan WxPyQtKinter <sullivanz.pku at gmail.com> writes:
> >>
> >>> On Aug 8, 2:35 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> >>>> Sullivan WxPyQtKinter <sullivanz.... at gmail.com> writes:
> >>>>> This program:
> >>>>> for i in range(1000000000):
> >>>>>       f.readline()
> >>>>> is absolutely every slow....
> >>>> There are two problems:
> >>>>
> >>>>  1) range(1000000000) builds a list of a billion elements in memory
> >> [...]
> >>>>  2) f.readline() reads an entire line of input
> >> [...]
> >>> Thank you for pointing out these two problem. I wrote this program
> >>> just to say that how inefficient it is to use a seemingly NATIVE way
> >>> to seek a such a big file. No other intention........
> >> The native way isn't iterating over 'range(hugenum)', it's to use an
> >> iterator. Python file objects are iterable, only reading eaach line as
> >> needed and not creating a companion list.
> >>
> >>     logfile = open("foo.log", 'r')
> >>     for line in logfile:
> >>         do_stuff(line)
> >>
> >> This at least avoids the 'range' issue.
> >>
> >> To know when we've reached a particular line, use 'enumerate' to
> >> number each item as it comes out of the iterator.
> >>
> >>     logfile = open("foo.log", 'r')
> >>     target_line_num = 10**9
> >>     for (line_num, line) in enumerate(file):
> >>         if line_num < target_line_num:
> >>             continue
> >>         else:
> >>             do_stuff(line)
> >>             break
> >>
> >> As for reading each line: that's unavoidable if you want a specific
> >> line from a stream of variable-length lines.
> >>
> >
> > The minimum bounds for a line is at least one byte (the newline) and
> > maybe more, depending on your data. You can seek() forward the minimum
> > amount of bytes that (1 billion -1) lines will consume and save
> > yourself some wasted IO.
>
> Except that you will have to count the number of lines in that first
> billion characters in order to determine when to stop.
>

True. Perhaps you can tell from the data itself what line you want.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Aug  9 06:16:56 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 09 Aug 2007 12:16:56 +0200
Subject: wxPython before MainLoop
References: <13bl9a75laqcm70@corp.supernews.com>
Message-ID: <5i07soF3mg0r8U2@mid.individual.net>

[david] wrote:

> I'd like to refresh the display before I start the main loop.
> [...]
> I'd like to just make app.Show() finish correctly before running
> long_slow_init.

IMHO, this will bring no gain. If you see an inresponsive user
interface or not is quite meaningless.

> Or is there a better idea?

As suggested, a solution using threads is feasible.

Regards,


Bj?rn

-- 
BOFH excuse #422:

Someone else stole your IP address, call the Internet detectives!



From jantod at gmail.com  Tue Aug 14 10:09:34 2007
From: jantod at gmail.com (Janto Dreijer)
Date: Tue, 14 Aug 2007 14:09:34 -0000
Subject: Fast kNN from python
In-Reply-To: <mailman.1961.1187097127.22759.python-list@python.org>
References: <1187086584.076990.260680@r34g2000hsd.googlegroups.com>
	<mailman.1961.1187097127.22759.python-list@python.org>
Message-ID: <1187100574.898103.308060@l70g2000hse.googlegroups.com>

On Aug 14, 3:11 pm, Tim Churches <tc... at optushome.com.au> wrote:
> Janto Dreijer wrote:
> > I am looking for a Python implementation or bindings to a library that
> > can quickly find k-Nearest Neighbors given an arbitrary distance
> > metric between objects. Specifically, I have an "edit distance"
> > between objects that is written in Python.
>
> Orange? Seehttp://www.ailab.si/orange/- not sure about speed, but
> quite a few parts of it are written in C, and it does kNN.
>
> Tim C

Thanks, but I'm actually thinking of "fast" as in computer science
terms. e.g. O(log(n)) lookup time. I'll probably have tens of
thousands of objects to search and the distance calculation is
relatively slow.

>From the documentation it looks like Orange does a brute force search
for the nearest k items.



From rainwatching at gmail.com  Thu Aug 30 20:45:43 2007
From: rainwatching at gmail.com (=?iso-8859-9?q?S=F6nmez_Kartal?=)
Date: Fri, 31 Aug 2007 00:45:43 -0000
Subject: reload(sys)
Message-ID: <1188521143.421431.119100@l22g2000prc.googlegroups.com>

Hello,

I've had an encoding issue and solved it by
"sys.setdefaultencoding('utf-8')"...

My first try wasn't successful since setdefaultencoding is not named
when I imported sys module. After, I import sys module, I needed to
write "reload(sys)" also.

I wonder why we need to call "reload(sys)" to get setdefaultencoding
named?

Happy coding



From grflanagan at yahoo.co.uk  Wed Aug 29 03:37:15 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: Wed, 29 Aug 2007 00:37:15 -0700
Subject: tempfile.mkstemp and os.fdopen
In-Reply-To: <1188323759.955043.317630@19g2000hsx.googlegroups.com>
References: <1188323759.955043.317630@19g2000hsx.googlegroups.com>
Message-ID: <1188373035.437896.179590@o80g2000hse.googlegroups.com>

On Aug 28, 7:55 pm, billiejoex <gne... at gmail.com> wrote:
> Hi there.
> I'm trying to generate a brand new file with a unique name by using
> tempfile.mkstemp().
> In conjunction I used os.fdopen() to get a wrapper around file
> properties (write & read methods, and so on...) but 'name' attribute
> does not contain the correct file name. Why?
>

import tempfile, os

class TempFile(object):

    def __init__(self, fd, fname):
        self._fileobj = os.fdopen(fd, 'w+b')
        self.name = fname

    def __getattr__(self, attr):
        return getattr(self._fileobj, attr)

def mktempfile(dir=None, suffix='.tmp'):
    return TempFile(*tempfile.mkstemp(dir=dir, suffix=suffix))







From antroy at gmail.com  Wed Aug  1 11:16:11 2007
From: antroy at gmail.com (Ant)
Date: Wed, 01 Aug 2007 08:16:11 -0700
Subject: Where do they tech Python officialy ?
In-Reply-To: <mailman.1423.1185957645.22759.python-list@python.org>
References: <1185209574.045112.163780@g4g2000hsf.googlegroups.com>
	<7xveca4ajp.fsf@ruckus.brouhaha.com>
	<1185265091.276958.239910@r34g2000hsd.googlegroups.com>
	<1i23wyk.avc945i4dwsiN%aleax@mac.com>
	<mailman.1423.1185957645.22759.python-list@python.org>
Message-ID: <1185981371.536594.316890@b79g2000hse.googlegroups.com>

On Aug 1, 9:40 am, Alex Popescu <nospam.themindst... at gmail.com> wrote:
...
> It depends :-). In my experience I met employers being concerned by my
> implication in the oss world :-).

I have the opposite experience. It was predominantly the fact that I
was involved in several open source projects that got me into
professional development 3 years ago. The employers in the market at
the time required 2 years+ of commercial experience - the fact that I
was involved in OSS helped on two counts, firstly that it showed that
I actually have an interest in development (rather than being another
Comp Sci graduate just after a wage), and secondly that I have
experience in good development practice (the open source projects I
worked on had better infrastructure in place than two of the three
companies I've worked for since!)

--
Ant...

http://antroy.blogspot.com/




From nytrokiss at gmail.com  Wed Aug  1 18:46:54 2007
From: nytrokiss at gmail.com (James Matthews)
Date: Wed, 1 Aug 2007 15:46:54 -0700
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <f8r147$rvm$1@sea.gmane.org>
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
	<f8quug$m7j$1@sea.gmane.org>
	<496954360708011453h2a68dee4x48dcb15bb25ea717@mail.gmail.com>
	<f8r0du$qhn$1@sea.gmane.org> <f8r147$rvm$1@sea.gmane.org>
Message-ID: <8a6b8e350708011546u348c293co9131da887f9f08f5@mail.gmail.com>

I am very happy with there support i concur with what Joshua wrote! I have
yet to see a full paying consumer not happy with wingide

On 8/1/07, Steve Holden <steve at holdenweb.com> wrote:
>
> Joshua J. Kugler wrote:
> > On Wednesday 01 August 2007 13:53, Robert Dailey wrote:
> >> He's secretly an employee of Wing IDE in disguise!!!
> >
> > Sorry to destroy your conspiracy theories, but no, I've never been
> employed
> > by Wing IDE in any fashion, nor have I ever received any monetary
> > compensation from them in any form.  Just a satisfied user.  That's all.
> >
> > j
> >
> Me too, and I have to say the response I have had to all my technical
> support requests has been first-class. Maybe they are busy because
> they're in beta? I know they aren't the largest company, but they can
> stand comparison with most when it comes to support.
>
> I can't think of any other products I use where you can contact the
> support team from right inside the software. And get answers without
> paying per-incident support fees!
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd           http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.goldwatches.com/
http://www.jewelerslounge.com
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From bignose+hates-spam at benfinney.id.au  Thu Aug  9 21:13:39 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 10 Aug 2007 11:13:39 +1000
Subject: Puzzled by "is"
References: <20070809194105.39BD11E400A@bag.python.org>
	<f9frbl$dps$1@sea.gmane.org>
	<mailman.1814.1186692638.22759.python-list@python.org>
Message-ID: <87zm1042f0.fsf@benfinney.id.au>

Grzegorz S?odkowicz <jergosh at wp.pl> writes:

> That's just theorisation but I'd rather expect the interpreter
> simply not to create a second tuple while there already is an
> identical one.

Others have already said that it's an implementation optimisation,
which seems to partly answer your question.

It's important to also realise that the language is *deliberately*
non-committal on whether any given value will have this behaviour;
that is, it's entirely left to the language implementation which
optimisation trade-offs to make, and the language user (that's you and
I) should *not* expect any particular behaviour to hold between
different implementations.

-- 
 \         "Holy priceless collection of Etruscan snoods, Batman!"  -- |
  `\                                                             Robin |
_o__)                                                                  |
Ben Finney


From steve at holdenweb.com  Fri Aug 17 19:03:33 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 17 Aug 2007 19:03:33 -0400
Subject: advice about `correct' use of decorator
In-Reply-To: <46C5C9AE.5020508@fmed.uba.ar>
References: <46C4B097.4080309@fmed.uba.ar>	<740c3aec0708170529s6f7e7fe2l8c92771c2d0a51d4@mail.gmail.com>
	<46C5C9AE.5020508@fmed.uba.ar>
Message-ID: <fa59fs$3ac$2@sea.gmane.org>

Gerardo Herzig wrote:
[...]
> As far as i know (by the way, AFAK is the shortcut? [...]

That's "AFAIK", AFAIK :-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From larry.bates at websafe.com  Thu Aug  9 15:02:14 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 09 Aug 2007 14:02:14 -0500
Subject: how to get output.
In-Reply-To: <1186646135.742185.5280@x35g2000prf.googlegroups.com>
References: <mailman.1777.1186641317.22759.python-list@python.org>
	<5hvrhhF3m15c7U1@mid.uni-berlin.de>
	<1186645852.687961.323420@x35g2000prf.googlegroups.com>
	<1186646135.742185.5280@x35g2000prf.googlegroups.com>
Message-ID: <46BB64B6.1000303@websafe.com>

indu_shreenath at yahoo.co.in wrote:
> I corrected a typ below.
> 
> On Aug 9, 12:50 pm, indu_shreen... at yahoo.co.in wrote:
>> Hey,
>>
>> I did write the following:
>> but it does not work.
>>
>> import subprocess as sp
>> try:
>>     p = sp.Popen("DIR . /AD /B", stdout=sp.PIPE)
>>     result = p.communicate()[0]
>>     print result
>>  except:
>>      print "error"
>>
>> This throws error.
>> DIR . /AD /B will list out only directories in the current directory.
>>
>> Thanks,
>> Indu
>>
>> On Aug 9, 11:46 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>>
>>
>>
>>> indu_shreenath schrieb:
>>>> Hey,
>>>> I want to get the output of "DIR /AD /B" command to a varriable using
>>>> python. How can I do this?
>>> Using the subprocess-module.
>>> However, I'm not sure what DIR /AD /B does - but there are many
>>> functions in module os that might deliver what you want without invoking
>>> an external command.
>>> Diez- Hide quoted text -
>> - Show quoted text -
> 
> 
That is better done in python with:

import os
dirs=[d for d in os.listdir(os.curdir) if os.path.isdir(d)]

or

dirs=filter(os.path.isdir, os.listdir(os.curdir))

-Larry


From danmcleran at yahoo.com  Wed Aug 15 15:38:32 2007
From: danmcleran at yahoo.com (danmcleran at yahoo.com)
Date: Wed, 15 Aug 2007 12:38:32 -0700
Subject: threads, mutual exclusion, and lists
In-Reply-To: <1187206583.255588.57920@e9g2000prf.googlegroups.com>
References: <1187206583.255588.57920@e9g2000prf.googlegroups.com>
Message-ID: <1187206712.725247.14650@x35g2000prf.googlegroups.com>

On Aug 15, 1:36 pm, Scott <smba... at gmail.com> wrote:
> I have two threads that share a python list. One thread adds to the
> list with append(), the other thread removes items with pop().
>
> My question is -- are python list operations atomic? If they are not,
> then I assume I need to put some mutual exclusion around the append()
> and pop() calls ?
>
> Thanks,
> Scott

You might want to consider using a Queue instead. It is designed to be
thread-safe.



From arkanes at gmail.com  Wed Aug 22 12:31:32 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 22 Aug 2007 11:31:32 -0500
Subject: IDE for Python
In-Reply-To: <46CBBCB1.9060604@chem.byu.edu>
References: <mailman.55.1187690455.32294.python-list@python.org>
	<1187698999.545439.322600@k79g2000hse.googlegroups.com>
	<46CB81FD.5070101@bigfoot.com> <46CBBCB1.9060604@chem.byu.edu>
Message-ID: <4866bea60708220931s6b424cd1u6c3f3d9df9dec800@mail.gmail.com>

On 8/21/07, Michael L Torrie <torriem at chem.byu.edu> wrote:
> Ricardo Ar?oz wrote:
> > Hi,
> >       Do you know if for in-house development a GPL license applies? (Qt4
> > and/or Eric4).
>
> If your programs are used in-house and never released, then you don't
> have to abide by the terms of the GPL.

Slight clarification. You have to abide by the terms of the GPL no
matter what, but the terms of the GPL (might) not cover in-house
distribution.

The idea that "in-house" distribution isn't distribution and doesn't
invoke copyright claims is purely the opinion of the FSF, isn't
explicitly stated in the GPL, (maybe in GPL 3? I haven't been keeping
up) and isn't supported by case law. This means that people who
distribute under the GPL but do not agree with the FSFs definition of
"distribute" may have a problem with in-house development that doesn't
obey the GPL.

As a final note, *using* Eric or any other application written in
Qt/PyQt doesn't have any effect on you - this only matters if you are
writing your own applications using Qt.

As a doubly final note, this isn't legal advice, I'm not a lawyer, ask
lawyers, not the internet, for legal advice, etc, etc.


From stefan at 3niemann.de  Wed Aug 29 16:53:16 2007
From: stefan at 3niemann.de (Stefan Niemann)
Date: Wed, 29 Aug 2007 22:53:16 +0200
Subject: Haskell like (c:cs) syntax
References: <fb25uh$gl9$1@online.de>
	<1188349012.502720.296440@x40g2000prg.googlegroups.com>
Message-ID: <fb4md1$iqe$1@online.de>

Thanks for all the good answers.

In fact the `Extended Iterable Unpacking' is exactly what I was looking for. 
Ok, my main aspect of writing

    head, *tail = seq

instead of

    head, tail = seq[0], seq[1:]

is the syntactic sugar. As mentioned in the PEP this may also be faster when 
iterables are involved.

Stefan

"Matimus" <mccredie at gmail.com> schrieb im Newsbeitrag 
news:1188349012.502720.296440 at x40g2000prg.googlegroups.com...
>> Is there a pattern matching construct in Python like (head : tail), 
>> meaning
>> 'head' matches the first element of a list and 'tail' matches the rest? I
>> could not find this in the Python documentation.
>
> Not really, but you could do something like this:
>
> [code]
> def foo(head, *tail):
>    #do stuff with head and tail
>
> foo(*seq)
> [/code]
>
> Also, Python 3.0 will have `Extended Iterable Unpacking'
> http://www.python.org/dev/peps/pep-3132/
>
> This isn't quite the same as Haskell's type matching, but would enable
> similar behavior in some cases.
>
> example:
> [code]
> head, *tail = seq
> [/code]
>
> Which would assign the first element of seq to head, and the remainder
> to tail.
>
> Matt
> 




From steve.morin at gmail.com  Thu Aug  9 20:26:54 2007
From: steve.morin at gmail.com (Steve)
Date: Fri, 10 Aug 2007 00:26:54 -0000
Subject: High performance binary data
Message-ID: <1186705614.728812.284460@j4g2000prf.googlegroups.com>

I want to ready binary data from a udp socket effeciently as possible
in python.  I know of the struct package but do people have any tips
when dealing with binary data in python?  Is there a library or api
that is faster when dealing with binary data. I am looking for a any
one with experience or ideas on the subject.  Pointers any one?

Thanks
Steve



From michael at jedimindworks.com  Wed Aug 15 04:55:50 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Wed, 15 Aug 2007 01:55:50 -0700
Subject: curses library
In-Reply-To: <20070814211043.286b8aa6.ghirai@ghirai.com>
References: <20070814211043.286b8aa6.ghirai@ghirai.com>
Message-ID: <0850B9D2-307D-46A7-B5DD-16B4491B9A98@jedimindworks.com>


On Aug 14, 2007, at 11:10 AM, Ghirai wrote:

> I need to write a console application.
>
> Are there any wrappers around curses/ncurses?
> Or any other similar libraries?

It looks like Curses Tk still exists: http://www.schwartzcomputer.com/ 
tcl-tk/tcl-tk.html

It probably requires a recompile of Tk and maybe Python but may allow  
for the same code to work as console and gui?  If it works that way,  
that's a plus for Tkinter...

regards,
Michael
---
Simplicity is the ultimate sophistication. -Leonardo da Vinci





From arnau at ehas.org  Thu Aug 23 03:33:57 2007
From: arnau at ehas.org (Arnau Sanchez)
Date: Thu, 23 Aug 2007 09:33:57 +0200
Subject: How do I get the current path of my python file that is currently
	running.
In-Reply-To: <eb79828c0708222012o1dec7c82k24c4a4c9015b6df7@mail.gmail.com>
References: <eb79828c0708222012o1dec7c82k24c4a4c9015b6df7@mail.gmail.com>
Message-ID: <46CD3865.9060403@ehas.org>

Lamonte Harris escribi?:

> Say I start i click on a python file on my desktop, how could I return 
> the path of the current python file thats running?

http://docs.python.org/lib/module-sys.html


From amccabe at hawkeyerec.com  Tue Aug 14 08:30:25 2007
From: amccabe at hawkeyerec.com (Tony)
Date: Tue, 14 Aug 2007 07:30:25 -0500
Subject: Script to copy database
Message-ID: <GeOdnSj725utPFzbnZ2dnUVZ_vOlnZ2d@centurytel.net>

I'm new at this and would like to know how set up a script to copy a 
database from a local computer to a network at a certain time everyday. 
Should be simple enough, but, as of now I am unfamiliar with how to do this. 
Would this be done by writing a script and setting up a  scheduled task to 
run the script?  Can anyone help me with the script?  Just need it to copy 
an Access database from the local C: drive to a network F: drive.

Thanks,
Tony 




From richardjones at optushome.com.au  Thu Aug  9 18:06:46 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Fri, 10 Aug 2007 08:06:46 +1000
Subject: Querying Graphics Card Name
References: <1186686984.160312.175270@i13g2000prf.googlegroups.com>
Message-ID: <46bb8ff6$0$25982$afc38c87@news.optusnet.com.au>

Benjamin Goldenberg wrote:
> I would like to find out the name of the graphics card of the machine
> my program is running on. I have looked into the pyopengl module, and
> using them to query the card, but it seems like there ought to be a
> simpler way to find this out without setting up a glcontext. Does
> anyone have any ideas?

You need a context if you're going to ask OpenGL to tell you what the card
is. To find out any other way would be highly platform-specific, possibly
though looking in the /proc directory on Linux, and who-knows-where-else on
other platforms.

Also, have a look at tools/info.py in the pyglet project
<http://www.pyglet.org/>


    Richard



From arnau at ehas.org  Sat Aug 18 15:18:29 2007
From: arnau at ehas.org (Arnau Sanchez)
Date: Sat, 18 Aug 2007 21:18:29 +0200
Subject: sort dictionary by specific values
In-Reply-To: <d6a0d8f10708181140p43208d0q199f08159f5c45ff@mail.gmail.com>
References: <d6a0d8f10708181140p43208d0q199f08159f5c45ff@mail.gmail.com>
Message-ID: <46C74605.6060200@ehas.org>

dorje tarap escribi?:

>    2.
>       {8: (99, 99), 9: [(55, 67), (77, 66), (67, 88)], 4: [(45, 78),
>       (56, 78), (99, 78)], 5: (67, 77)}
> 
> 
> I want to sort the entire dictionary based on the last values in each 
> line. First for [-1][0] and then[-1][0]

Each "line" means each value in the dictionary?

Did you mean ordering [-1][0] and then [-1][1]?

Dictionaries cannot be ordered, but you can work with its items (as a list).

Your data is not homogeneous (values in the dictionary are both tuples 
and list of tuples). If you can build it that way:

d = {8: [(99, 99)], 9: [(55, 67), (77, 66), (67, 88)], 4: [(45, 78),
(56, 78), (99, 78)], 5: [(67, 77)]

It would be easy to sort:

import operator
cmplast = lambda x, y: cmp(x[-1], y[-1])
sorted(d.items(), key=operator.itemgetter(1), cmp=cmplast, reverse=True)

or

cmplast1 = lambda x, y: cmp(x[1][-1], y[1][-1])
sorted(d.items(), cmp=cmplast1, reverse=True)

[(8, [(99, 99)]), (4, [(45, 78), (56, 78), (99, 78)]), (9, [(55, 67), 
(77, 66), (67, 88)]), (5, [(67, 77)])]



From mensanator at aol.com  Mon Aug 27 14:38:24 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Mon, 27 Aug 2007 11:38:24 -0700
Subject: convert non-delimited to delimited
In-Reply-To: <13d66b6b0fnke49@corp.supernews.com>
References: <1188237563.889663.228970@o80g2000hse.googlegroups.com>
	<13d66b6b0fnke49@corp.supernews.com>
Message-ID: <1188239904.282306.90690@k79g2000hse.googlegroups.com>

On Aug 27, 1:35 pm, Mark Elston <m.els... at advantest-ard.com> wrote:
> * RyanL wrote (on 8/27/2007 10:59 AM):
>
>
>
>
>
> > I'm a newbie!  I have a non-delimited data file that I'd like to
> > convert to delimited.
>
> > Example...
> > Line in non-delimited file:
> > 0139725635999992000010100534+42050-102800FM-15+1198KAIA
>
> > Should be:
> > 0139,725635,99999,2000,01,01,00,53,4,+42050,-102800,FM-15,+1198,KAIA
>
> > What is the best way to go about this?  I've looked all over for
> > examples, help, suggestions, but have not found much.  CSV module
> > doesn't seem to do exactly what I want.  Maybe I'm just missing
> > something or not using the correct terminology in my searches.  Any
> > assistance is greatly appreaciated!  Using Python 2.4
>
> Since you have to know, a priori, how to break the input string I
> assume that these fields are of fixed length.  You can use the following
> to do what you want:
>
>  >>> a="0139725635999992000010100534+42050-102800FM-15+1198KAIA"
>  >>> print "%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s" %
>      (a[0:4],a[4:10],a[10:15],a[15:19],a[19:21],a[21:23],a[23:25],
>       a[25:27],a[27],a[28:34],a[34:41],a[41:46],a[46:51],a[51:])
>
> which results in the following output:
>
> 0139,725635,99999,2000,01,01,00,53,4,+42050,-102800,FM-15,+1198,KAIA
>
> Mark

Or try this:

import struct
test = '0139725635999992000010100534+42050-102800FM-15+1198KAIA'
template = '4s6s5s4s2s2s2s2s1s6s7s5s5s4s'
the_line = struct.unpack(template,test)
print the_line
print ','.join(the_line)

##  ('0139', '725635', '99999', '2000', '01', '01', '00', '53', '4',
'+42050', '-102800', 'FM-15', '+1198', 'KAIA')
##
##
0139,725635,99999,2000,01,01,00,53,4,+42050,-102800,FM-15,+1198,KAIA



From pyth0nc0d3r at gmail.com  Tue Aug 28 11:47:49 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Tue, 28 Aug 2007 09:47:49 -0600
Subject: Asking all python programmers.
In-Reply-To: <2dc0c81b0708280822t70bf0528s4f80fe926cbb91bf@mail.gmail.com>
References: <eb79828c0708272042x238f575aq28d01964bf6ab1db@mail.gmail.com>
	<2dc0c81b0708280822t70bf0528s4f80fe926cbb91bf@mail.gmail.com>
Message-ID: <eb79828c0708280847od69b961s2ccb4332ad45a5ab@mail.gmail.com>

I completely understand, I've sent this email when I was tired sorry for the
misunderstanding, yes I completely understand what you mean how
professionals won't take me serious in situations like this.  How about I
readdress my question for you?

Hello everyone on python mailing list.  I would like your input on what
information about python programming language that I should study the most.
Some tutorials are good, but the manual is main resource even if it isn't
well documented J.  On a friendly note I would like to hear what you guys
would have to recommend if that is ok.  From a python starter, I don't like
the word noob because it sounds very unprofessional.



-Lamonte


On 8/28/07, Shawn Milochik <Shawn at milochik.com> wrote:
>
> On 8/27/07, Lamonte Harris <pyth0nc0d3r at gmail.com> wrote:
> > Okay,  I know you've guys told me millions of times to read the manual
> I've
> > read a lot of it.  What do you recommend studying the most? Python is my
> > goal for the next year in the half. :)
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
> Some notes on your question:
>
> "You've guys" is nonsensical.
> Your first sentence is a run-on sentence.
> Your e-mail address identifies you as an immature script-kiddie.
> "Year in the half" is nonsensical.
>
> Okay, so why am I "picking on you"? Because I want to help. Present
> yourself in this way, and you're not going to get as much help from
> intelligent people as you would if they saw you were worth their time.
>
> You are either going to get angry at me or you're going to think about
> this. If you're angry then I can't help you. If you actually care how
> people see you, you will get further in life in general.
>
> To answer the question I think you were trying to ask, a combination
> of "The Python Cookbook" and "Dive Into Python" should get you started
> in doing amazing things with Python. The latter is available for free
> online.
>
> Take some pride in the way you write. It will pay off.
>
> Shawn
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From kyosohma at gmail.com  Mon Aug  6 14:39:59 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 06 Aug 2007 18:39:59 -0000
Subject: wxWindows - incorrect path on installation?
In-Reply-To: <1186422861.132899.50060@g4g2000hsf.googlegroups.com>
References: <1186422861.132899.50060@g4g2000hsf.googlegroups.com>
Message-ID: <1186425599.377867.156410@g12g2000prg.googlegroups.com>

On Aug 6, 12:54 pm, frikk <frik... at gmail.com> wrote:
> This should be a very simple one, sorry!
>
> I installed wxWindows on my OS X box but I am unable to get my python
> install to recognize the module.  Unfortunately I don't know a whole
> lot about where modules install to or how to configure python to see
> them.  IE: 'import wx' does not work - it says unknown module wx.
>
> Do I need to tweak a path variable or something?
>
> I have MacPython installed and the binary of wxWindows (wxPython) from
> wxpython.com
>
> Thanks guys,
> Blaine

Check you version of Python. Update if needed and then go here for
your specific version: http://pythonmac.org/packages/

The wxPython website also talks about how to install wxPython on Macs.
See http://www.wxpython.org/download.php

Mike



From carsten at uniqsys.com  Sat Aug  4 15:23:48 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Sat, 04 Aug 2007 15:23:48 -0400
Subject: Encoding DeprecationWarning
In-Reply-To: <1186254427.792114.173170@q75g2000hsh.googlegroups.com>
References: <1186254427.792114.173170@q75g2000hsh.googlegroups.com>
Message-ID: <1186255428.3385.26.camel@dot.uniqsys.com>

On Sat, 2007-08-04 at 12:07 -0700, oliver at obeattie.com wrote:
> Hey There,
> 
> Sorry if I am missing something here, but I get a DeprecationWarning
> when importing a list which has some unicode characters in it

Please copy and paste the full text of the warning.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From cjw at sympatico.ca  Thu Aug 16 17:33:43 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Thu, 16 Aug 2007 17:33:43 -0400
Subject: sub-classing the types in the builtin module datetime
In-Reply-To: <1187294329.082872.230800@l22g2000prc.googlegroups.com>
References: <mailman.2043.1187225689.22759.python-list@python.org>
	<1187294329.082872.230800@l22g2000prc.googlegroups.com>
Message-ID: <46C4C2B7.6000701@sympatico.ca>

attn.steven.kuo at gmail.com wrote:
> On Aug 15, 5:54 pm, "Colin J. Williams" <c... at sympatico.ca> wrote:
>> I posted this about 5 hours ago, but it seems to have gone astray.
> 
> 
> (snipped)
> 
>>  >
>>  >> I wish to sub-class (if that's the right word) datetime and to use a
>>  >> different signature for the constructor.
>>  >>
>>  >> The second part has gone smoothly, but it is difficult to access the
>>  >> type's methods from the sub-class instance.
>>  >>
>>  >> I'm beginning to wonder whether it might might be simpler to write my
>>  >> own Date class.
>>  >>
>>  >> Does anyone have any comments please?
>>  >>
>>  >> Colin W.
> 
> (snipped)
> 
> 
>> Yes, I should have posted an example, but I thought that others might
>> have experienced the problem.
>>
>> It is illustrated at the bottom of this script:
>>
>> # subClassing.py
>>
>> import datetime
>> import new
>> import sys
>> import types
>>
>> class Date(datetime.datetime):
>>    ''' Date(s) -> a date object.__class__
>>          where s is an 8 digit string'''
>>
>>    def __new__(cls, YYmmdd):
>>      ''' YYmmdd is a string, in the form yyyymmdd i.e. 8 digits.
>>      or            a 3-tuple of integers in the form (y, m, d)
>>      or            a 6-tuple of integers in the form (y, m, d, h, m,
>> s) '''
> 
> 
> (snipped)
> 
>> a= datetime.datetime(2007, 7, 31)
>> d= Date('20070731')
>> tm= datetime.time(1, 2)
>> try:
>>    print a.today()
>> #  print d.today()        # grief
>>    print a.now()
>> #  print d.now()          # grief
>>    print a.combine(a, tm)  # OK, but  why not a.combine(tm)?
>> #  e= d.combine(d, tm)    # grief
>>    print a.utcnow()
>> #  print d.utcnow()       # grief
>>    print a.ctime()
>>    print d.ctime()
>> except:
>>    print 'Grief'
>>    print sys.exc_info()
>>
>> Colin W.
> 
> 
> 
> 
> 
> This problem arises when you change the function signature of __new__.
> I'm a little unclear as to why but it seems for the classmethods
> (thosed marked with the METH_CLASS flag in the C source code), you
> need to arrange to bypass the normal method resolution (I used a
> metaclass
> to do this):
> 
> 
> 
> import datetime
> 
> class Date(datetime.datetime):
>     pass
> 
> class FixClassMethods(type):
>     def __init__(cls, classname, bases, classdict):
>         # add strptime if using Python 2.5
>         flagged_as_meth_class = ('today', 'now', 'fromtimestamp',
>         'fromordinal', 'now', 'utcnow', 'utcfromtimestamp', 'combine')
>         for meth in flagged_as_meth_class:
>             setattr(cls, meth, getattr(datetime.datetime, meth))
> 
> class DateChangesNewSignature(datetime.datetime):
>     @staticmethod
>     def str2ymd(strval):
>         yyyy, mm, dd = (int(substr) for substr in (strval[:4],
>             strval[4:6], strval[6:]))
>         return yyyy, mm, dd
> 
>     def __new__(cls, strval):
>         yyyy, mm, dd = DateChangesNewSignature.str2ymd(strval)
>         return super(DateChangesNewSignature,cls).__new__(cls, yyyy,
> mm,
>                 dd)
>     def __init__(self, strval):
>         yyyy, mm, dd = DateChangesNewSignature.str2ymd(strval)
>         super(DateChangesNewSignature, self).__init__(yyyy, mm,
>                 dd)
> 
> class DLast(DateChangesNewSignature):
>     __metaclass__ = FixClassMethods
> 
> f = Date(2007,07,07)
> print f
> print f.today()
> 
> f2 = DateChangesNewSignature("20070707")
> print f2
> try:
>     print f2.today()
> except TypeError, e:
>     print str(e)
>     print "Uh?"
> 
> 
> f3 = DLast("20070707")
> print f3
> print f3.today()
> 
> 
> I get:
> 
> 2007-07-07 00:00:00
> 2007-08-16 12:57:41.480679
> 2007-07-07 00:00:00
> __new__() takes exactly 2 arguments (9 given)
> Uh?
> 2007-07-07 00:00:00
> 2007-08-16 12:57:41.483104
> 
> 
> --
> Hope this helps,
> Steven
> 
Steven,

Many thanks, I'll try this out tomorrow.

Colin W


From max at alcyone.com  Sun Aug 12 20:15:41 2007
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 12 Aug 2007 17:15:41 -0700
Subject: Fatest standard way to sum bytes (and their squares)?
In-Reply-To: <87r6m8egee.fsf@mulj.homelinux.net>
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
	<87r6m8egee.fsf@mulj.homelinux.net>
Message-ID: <ntGdnTuqYbgzPyLbnZ2dnUVZ_gadnZ2d@speakeasy.net>

Hrvoje Niksic wrote:

> For ordinalSum, using imap is almost twice as fast:
> 
> $ python -m timeit -s 'data=[chr(x) for x in xrange(256)]' 'sum(ord(x) for x in data)'
> 10000 loops, best of 3: 92.4 usec per loop
> $ python -m timeit -s 'data=[chr(x) for x in xrange(256)]; from itertools import imap' 'sum(imap(ord, data))'
> 10000 loops, best of 3: 55.4 usec per loop

You're using data which is a list of chars (strings), rather than a 
string itself, which is what the format is in.  The imap optimization 
doesn't appear to work quite as dramatically well for me with strings 
instead of lists, but it certainly is an improvement.

> Of course, that optimization doesn't work for the squared sum; using a
> lambda only pessimizes it.

Right.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Experience is the name everyone gives to their mistakes.
    -- Oscar Wilde


From jstroud at mbi.ucla.edu  Tue Aug 21 04:42:09 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 21 Aug 2007 01:42:09 -0700
Subject: searching dict key with reqex
In-Reply-To: <1187684878.123427.42230@x35g2000prf.googlegroups.com>
References: <1187684878.123427.42230@x35g2000prf.googlegroups.com>
Message-ID: <9uxyi.4416$i75.564@newssvr19.news.prodigy.net>

james_027 wrote:
> hi,
> 
> can I use regex instead of a plain string with this kind of syntax ...
> 
> 'name' in a_dictionary
> 
> something like
> 
> r'name_\D+' in a_dictionary?
> 
> Thanks
> james
> 

This makes it a one-liner:

import re

def rgxindict(rgx, adict):
   return any(re.match(rgx,k) for k in adict)

James



From jjl at pobox.com  Tue Aug 21 17:36:53 2007
From: jjl at pobox.com (John J. Lee)
Date: Tue, 21 Aug 2007 21:36:53 GMT
Subject: urllib2.urlopen(url) pulling something other than HTML
References: <1187635452.841155.88720@a39g2000hsc.googlegroups.com>
	<1187641080.516885.122350@g4g2000hsf.googlegroups.com>
Message-ID: <87ejhwr2mi.fsf@pobox.com>

Gabriel Genellina <gagsl-py2 at yahoo.com.ar> writes:
[...]
> Don't even try to understand it - it's a mess. Use the HTMLParser
> module instead.
[...]

Module sgmllib (and therefore module htmllib also) is more tolerant of
bad HTML than module HTMLParser.


John


From pavlovevidence at gmail.com  Fri Aug 31 03:03:24 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 31 Aug 2007 03:03:24 -0400
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<1188534061.243009.89640@m37g2000prh.googlegroups.com>
	<roy-1338B4.01150431082007@news.panix.com>
Message-ID: <46d7c06c$0$19633$4c368faf@roadrunner.com>

On Fri, 31 Aug 2007 01:15:04 -0400, Roy Smith wrote:

> Carl Banks <pavlovevidence at gmail.com> wrote:
>> Python really isn't suitable for in-flight controls for various
>> reasons, and mission critical concerns is a minor one (systems with
>> less underlying complexity tend to have fewer failure modes).  But
>> mostly it's raw throughput: Python is just too slow.  Flight control
>> computers have to be powerful enough make a ton of mathematical
>> calculations in a matter of milliseconds, and under strict weight and
>> power constraints.  The cost of running 100 times slower than optimal
>> is just too high.
> 
> I'm not convinced that's true for all avionics uses.

Of course it's not.  I was talking about flight control, not avionics in 
general.  (Perhaps when single-engine Cessnas go digital we'll even see 
flight controllers in Python.)


Carl Banks


From bill.scherer at verizonwireless.com  Thu Aug  9 13:46:53 2007
From: bill.scherer at verizonwireless.com (Bill Scherer)
Date: Thu, 09 Aug 2007 13:46:53 -0400
Subject: Puzzled by "is"
In-Reply-To: <NYOBGCEXSMTP22KIcCh00063e59@NYOBGCEXSMTP22.uswin.ad.vzwcorp.com>
References: <NYOBGCEXSMTP22KIcCh00063e59@NYOBGCEXSMTP22.uswin.ad.vzwcorp.com>
Message-ID: <46BB530D.8080308@verizonwireless.com>

Dick Moores wrote:
>  >>> () is ()
> True
>  >>> (1,) is (1,)
> False
>
> Why?
>   

>>> a = ()
>>> b = ()
>>> c = (1,)
>>> d = (1,)
>>> a is b
True
>>> c is d
False
>>> id(a)
3086553132
>>> id(b)
3086553132
>>> id(c)
3086411340
>>> id(d)
3086390892


There is only one empty tuple.
Does that clear it up for you?

> Thanks,
>
> Dick Moores
>
>   


From carsten at uniqsys.com  Thu Aug 30 15:08:08 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 30 Aug 2007 15:08:08 -0400
Subject: list index()
In-Reply-To: <1188499525.827573.128170@x35g2000prf.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<1188496588.750629.208100@g4g2000hsf.googlegroups.com>
	<mailman.154.1188497511.28954.python-list@python.org>
	<1188498073.997168.282420@q5g2000prf.googlegroups.com>
	<mailman.156.1188498891.28954.python-list@python.org>
	<1188499525.827573.128170@x35g2000prf.googlegroups.com>
Message-ID: <1188500888.11738.4.camel@dot.uniqsys.com>

On Thu, 2007-08-30 at 11:45 -0700, zzbbaadd at aol.com wrote:
> > That wish will only come true if you maintain your own fork of Python 3.
> > has_key() will go away, period. It has been made obsolete by "in", which
> > is faster and more concise.
> 
> Is there really some reason  "key" IN dict can be implemented faster
> than dict.has_key("key")???

Yes, see e.g.
http://groups.google.com/group/comp.lang.python/msg/03e9b4276846b9c0

-- 
Carsten Haese
http://informixdb.sourceforge.net




From cjw at sympatico.ca  Fri Aug 17 17:32:09 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 17 Aug 2007 17:32:09 -0400
Subject: sub-classing the types in the builtin module datetime
In-Reply-To: <1187294329.082872.230800@l22g2000prc.googlegroups.com>
References: <mailman.2043.1187225689.22759.python-list@python.org>
	<1187294329.082872.230800@l22g2000prc.googlegroups.com>
Message-ID: <46C613D9.5070009@sympatico.ca>

attn.steven.kuo at gmail.com wrote:
[My question snipped]
> 
> 
> 
> This problem arises when you change the function signature of __new__.
> I'm a little unclear as to why but it seems for the classmethods
> (thosed marked with the METH_CLASS flag in the C source code), you
> need to arrange to bypass the normal method resolution (I used a
> metaclass
> to do this):
> 
> 
> 
> import datetime
> 
> class Date(datetime.datetime):
>     pass
> 
> class FixClassMethods(type):
>     def __init__(cls, classname, bases, classdict):
>         # add strptime if using Python 2.5
>         flagged_as_meth_class = ('today', 'now', 'fromtimestamp',
>         'fromordinal', 'now', 'utcnow', 'utcfromtimestamp', 'combine')
>         for meth in flagged_as_meth_class:
>             setattr(cls, meth, getattr(datetime.datetime, meth))
> 
> class DateChangesNewSignature(datetime.datetime):
>     @staticmethod
>     def str2ymd(strval):
>         yyyy, mm, dd = (int(substr) for substr in (strval[:4],
>             strval[4:6], strval[6:]))
>         return yyyy, mm, dd
> 
>     def __new__(cls, strval):
>         yyyy, mm, dd = DateChangesNewSignature.str2ymd(strval)
>         return super(DateChangesNewSignature,cls).__new__(cls, yyyy,
> mm,
>                 dd)
>     def __init__(self, strval):
>         yyyy, mm, dd = DateChangesNewSignature.str2ymd(strval)
>         super(DateChangesNewSignature, self).__init__(yyyy, mm,
>                 dd)
> 
> class DLast(DateChangesNewSignature):
>     __metaclass__ = FixClassMethods
> 
> f = Date(2007,07,07)
> print f
> print f.today()
> 
> f2 = DateChangesNewSignature("20070707")
> print f2
> try:
>     print f2.today()
> except TypeError, e:
>     print str(e)
>     print "Uh?"
> 
> 
> f3 = DLast("20070707")
> print f3
> print f3.today()
> 
> 
> I get:
> 
> 2007-07-07 00:00:00
> 2007-08-16 12:57:41.480679
> 2007-07-07 00:00:00
> __new__() takes exactly 2 arguments (9 given)
> Uh?
> 2007-07-07 00:00:00
> 2007-08-16 12:57:41.483104
> 
> 
> --
> Hope this helps,
> Steven
> 

Steven,

Thanks, you provide an elegant solution to the datetime problem I raised.

I like the illustration of metaclass usage you have have given,
it's something I have had trouble grasping.

You handle the examples I gave.  However, on reflection,I feel that
('today', 'now', 'fromtimestamp', 'fromordinal', 'now', 'utcnow', 
'utcfromtimestamp', 'combine') are completely inappropriate as
methods and that they should have been set up as functions of
datetime and not as methods of datetime.datetime.
The difficulty I have in adopting your approach is that it would
be difficult for the reader to comprehend the code.

My feeling is that it should be possible to change a signature using
simple Python approaches.

I'll puzzle some more.

Thanks again.

Colin W.



From sentientholon at gmail.com  Thu Aug 23 10:05:56 2007
From: sentientholon at gmail.com (Frederick Polgardy)
Date: Thu, 23 Aug 2007 14:05:56 -0000
Subject: simple spider in python
In-Reply-To: <1187876014.845912.236690@e9g2000prf.googlegroups.com>
References: <1187876014.845912.236690@e9g2000prf.googlegroups.com>
Message-ID: <1187877956.750621.326560@r23g2000prd.googlegroups.com>

On Aug 23, 8:33 am, gmcalen... at gmail.com wrote:
> Hi everybody, i'm new to the forum so: hello everybody (should I say
> "world"?) ^_^
> I'm trying to do a simple spider in python which:
>
> 1) ask google a query
> 2) parse the data
>
> I'm a python newbie so *any* help would be very, very welcommed.
> Thanks in advice!
>
> cheers!

Take a look at the docs for urllib2.urlopen().  The examples should
give you most of what you need.




From Shawn at Milochik.com  Mon Aug 20 10:55:25 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Mon, 20 Aug 2007 10:55:25 -0400
Subject: Newbee Question
In-Reply-To: <fac850+2m5c@eGroups.com>
References: <fac850+2m5c@eGroups.com>
Message-ID: <2dc0c81b0708200755v4cd5b2a2h2ed0893745b2615e@mail.gmail.com>

#!/usr/bin/env python

normalPay = 0.4
overPay = 1.4
normalLimit = 22

def calcPay(numStops):

    pay = 0

    if numStops > normalLimit:
        pay = overPay * (numStops - normalLimit)
        numStops = normalLimit

    return pay + (numStops * normalPay)

if __name__ == "__main__":

    print "Pay for 1 stops: %.2f." % calcPay(1)
    print "Pay for 10 stops: %.2f." % calcPay(10)
    print "Pay for 17 stops: %.2f." % calcPay(17)
    print "Pay for 25 stops: %.2f." % calcPay(25)
    print "Pay for 30 stops: %.2f." % calcPay(30)
    print "Pay for 31 stops: %.2f." % calcPay(31)


From jantod at gmail.com  Tue Aug 14 16:52:28 2007
From: jantod at gmail.com (Janto Dreijer)
Date: Tue, 14 Aug 2007 20:52:28 -0000
Subject: Fast kNN from python
In-Reply-To: <1187117048.992003.103700@x35g2000prf.googlegroups.com>
References: <1187086584.076990.260680@r34g2000hsd.googlegroups.com>
	<1187117048.992003.103700@x35g2000prf.googlegroups.com>
Message-ID: <1187124748.984371.165220@w3g2000hsg.googlegroups.com>

On Aug 14, 8:44 pm, Miki <miki.teb... at gmail.com> wrote:
> Hello,
>
> > I am looking for a Python implementation or bindings to a library that
> > can quickly find k-Nearest Neighbors given an arbitrary distance
> > metric between objects. Specifically, I have an "edit distance"
> > between objects that is written in Python.
>
> First Google search for "k-Nearest Neighbors python", yieldedhttp://people.revoledu.com/kardi/tutorial/KNN/resources.html which
> pointed tohttp://biopython.org/DIST/docs/api/public/Bio.kNN-module.html
>
> HTH,
> --
> Miki <miki.teb... at gmail.com>http://pythonwise.blogspot.com

Thanks. Indeed, I did see that page. Unfortunately biopython's knn
does a brute force search for the nearest k and is therefore way too
slow.

Janto



From ttkk1024 at gmail.com  Wed Aug 29 23:55:57 2007
From: ttkk1024 at gmail.com (smalltalk)
Date: Wed, 29 Aug 2007 20:55:57 -0700
Subject: Jython 2.2 on Ubuntu
In-Reply-To: <T5udnRHMerc_GkjbnZ2dneKdnZydnZ2d@bt.com>
References: <-YOdnW_k3p6Fy0nb4p2dnAA@bt.com>
	<mailman.75.1188324867.28954.python-list@python.org>
	<T5udnRHMerc_GkjbnZ2dneKdnZydnZ2d@bt.com>
Message-ID: <1188446157.312304.274070@i13g2000prf.googlegroups.com>

On Aug 29, 10:50 pm, Neil Wallace <nos... at myisp.ifyouplease.com>
wrote:
> Thanks Tim,
>
> I subscribed to the Jython group hosted by sourceforge, and they are a
> great bunch of guys/gals.
>
> Here's what I did to fix my problem.
>
> 1. removed Jython 2.1 (using Synaptic)jytho
> 2. added the following lines (as root) to /etc/profile
>          # set PATH for Jython
>              PATH=$PATH:/home/neil/jython2.2
>          export PATH
>
> I had to restart X, that's it solved!!
>
> Neil
>
>
>
> Tim Couper wrote:
> > you need to ensure that the correct jython executable is in a directory
> > which is on your on your path.
>
> > I've just successfully test-subscribed to
> >https://lists.sourceforge.net/lists/listinfo/jython-users. Maybe you
> > could try again.
>
> > Tim
>
> > Dr Tim Couper
> > CTO, SciVisum Ltd
>
> >www.scivisum.com
>
> > Neil Wallace wrote:
> >> Hi all,
>
> >> I am a novice Python/Jython programmer, and Ubuntu user.
>
> >> Ubuntu still only supports only version 2.1 of Jython. I have used the
> >> GUI installer of Jython 2.2, and installed it to the default
> >> /root/jython2.2 directory. The install went without issues.
>
> >> However, typing ............jython --version
> >> in a teminal still gives me   ........ Jython 2.1 on java (JIT: null)
>
> >> What else do I need to do?
>
> >> regards
> >> Neil.
>
> >> p.s. I posted this to the jython group hosted by sourceforge, but it
> >> bounced. :-(- Hide quoted text -
>
> - Show quoted text -

you can use eclipse + pydev
it is very easy to setup jython or python



From vedrandekovic at v-programs.com  Tue Aug  7 04:24:14 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Tue, 07 Aug 2007 01:24:14 -0700
Subject: setuptools bbfreeze install egg error
Message-ID: <1186475054.223415.9040@l70g2000hse.googlegroups.com>

Hello,

I was download egg file bbfreeze-0.95.2-py2.4-win32.egg ( for windows
of course ),and I have setuptools
version 0.6c6 after I try install this with setuptools:

$ ez_setup bbfreeze-0.95.2-py2.4-win32.egg
Traceback (most recent call last):
   File "C:\Python24\Lib\site-packages\ez_setup.py", line 226, in ?
      main(sys.argv[1:])
   File "C:\Python24\Lib\site-packages\ez_setup.py", line 183, in main
      from setuptools.command.easy_install import main
   File "C:\Python24\Lib\site-packages\setuptools\command
\easy_install.py", line 16, in ?
      from distutils import log,dir_util
ImportError: cannot import name log


Regards,
Vedran



From bob at 1776.COM  Mon Aug 13 22:10:33 2007
From: bob at 1776.COM (Robert Coe)
Date: Mon, 13 Aug 2007 22:10:33 -0400
Subject: Car Air Conditioners
References: <1186993120.706804.185590@b79g2000hse.googlegroups.com>
Message-ID: <kk32c3d5qk1ur2eo1beqe77efsof70smhc@4ax.com>

On Mon, 13 Aug 2007 08:18:40 -0000, Lepi Duja <digitalplusmail at gmail.com>
wrote:
: All the informations about car air conditioners can be found on this
: website...
: 
: http://car-air-conditioning.blogspot.com/

It's hard to imagine anything more OT in this newsgroup, but FWIW my 2003 Kia
has the most powerful air conditioner I've ever seen in an automobile.

Bob


From jstroud at mbi.ucla.edu  Fri Aug  3 20:53:23 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 03 Aug 2007 17:53:23 -0700
Subject: How to pass a reference to the current module
In-Reply-To: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
Message-ID: <f90im3$8ms$1@daisy.noc.ucla.edu>

James Stroud wrote:
> Basically, what I am trying to acomplish is to be able to do this in any 
> arbitrary module or __main__:
> 
> 
> funcname = determined_externally()
> ModuleUser.do_something_with(AModule, funcname)
> 
> 
> Ideally, it would be nice to leave out AModule if the functions were 
> designed in the same namespace in which do_something_with is called.


Is this the preferred way?


import sys
def do_something_with(funcname, amodule=None):
   if amodule is None:
     function = sys._getframe(1).f_locals[funcname]
   else:
     function = getattr(amodule, funcname)
   [etc.]


James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From cai.haibin at gmail.com  Tue Aug 21 04:27:58 2007
From: cai.haibin at gmail.com (james_027)
Date: Tue, 21 Aug 2007 08:27:58 -0000
Subject: searching dict key with reqex
Message-ID: <1187684878.123427.42230@x35g2000prf.googlegroups.com>

hi,

can I use regex instead of a plain string with this kind of syntax ...

'name' in a_dictionary

something like

r'name_\D+' in a_dictionary?

Thanks
james



From pyscottishguy at hotmail.com  Fri Aug  3 12:20:10 2007
From: pyscottishguy at hotmail.com (pyscottishguy at hotmail.com)
Date: Fri, 03 Aug 2007 16:20:10 -0000
Subject: Efficient Rank Ordering of Nested Lists
In-Reply-To: <1186104049.022836.253470@e9g2000prf.googlegroups.com>
References: <1186104049.022836.253470@e9g2000prf.googlegroups.com>
Message-ID: <1186158010.322959.47370@g4g2000hsf.googlegroups.com>

On Aug 2, 10:20 pm, "pablo.mitch... at gmail.com"
<pablo.mitch... at gmail.com> wrote:
> A naive approach to rank ordering (handling ties as well) of nested
> lists may be accomplished via:
>
>    def rankLists(nestedList):
>       def rankList(singleList):
>           sortedList = list(singleList)
>           sortedList.sort()
>           return map(sortedList.index, singleList)
>       return map(rankList, nestedList)
>
>    >>> unranked = [ [ 1, 2, 3, 4, 5 ], [ 3, 1, 5, 2, 4 ], [ -1.1, 2.2,
> 0, -1.1, 13 ] ]
>    >>> print rankLists(unranked)
>
>    [[0, 1, 2, 3, 4], [2, 0, 4, 1, 3], [0, 3, 2, 0, 4]]
>
> This works nicely when the dimensions of the nested list are small.
> It is slow when they are big.  Can someone suggest a clever way to
> speed it up?

Isn't there something wrong with the ordering?

Pablo's answers are:
[ 1, 2, 3, 4, 5 ] == [0, 1, 2, 3, 4]  correct

[ 3, 1, 5, 2, 4 ] == [2, 0, 4, 1, 3] wrong?

[ -1.1, 2.2, 0, -1.1, 13 ] == [0, 3, 2, 0, 4] wrong?

Doing it in my head I get:
[ 3, 1, 5, 2, 4 ] == [ 1, 3, 0, 4, 2 ]

[ -1.1, 2.2, 0, -1.1, 13 ] == [0, 3, 2, 1, 4]

What gives?

Did I misunderstand what "rank ordering (handling ties as well)" means?



From bbxx789_05ss at yahoo.com  Thu Aug  9 03:50:07 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Thu, 09 Aug 2007 00:50:07 -0700
Subject: wxPython before MainLoop
In-Reply-To: <13bl9a75laqcm70@corp.supernews.com>
References: <13bl9a75laqcm70@corp.supernews.com>
Message-ID: <1186645807.343558.180500@d55g2000hsg.googlegroups.com>

On Aug 8, 11:25 pm, "[david]" <da... at nospam.spam> wrote:
> I'd like to refresh the display before I start the main loop.
>
> I have code like this:
>
> app = App()
> app.Show()
> app.long_slow_init()
> app.MainLoop()
>
> The main frame partly loads at Show, but because the mainloop has not
> started yet, the display does not update until long_slow_init() finishes.
>
> Alternatively, I could code
>
> app = App()
> app.long_slow_init()
> app.Show()
> app.MainLoop()
>
> Which would give me a crisp Show, but there would be a long slow wait
> before the app showed any activity at all. I would need a splash screen.
>
> I'd rather not have a splash screen (and I don't know how anyway). I'd
> like to just make app.Show() finish correctly before running
> long_slow_init.
>
> Is there a wx internal method that I can use to give Windows the
> opportunity to finish painting the frame before I run long_slow_init()?
>
> Or is there a better idea?
>
> (david)

You can use a separate thread to execute long_slow_init():

--------------------------
import wx
import threading
import time

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, "My Window")

        panel = wx.Panel(self, -1)
        button = wx.Button(panel, -1, "click me, quick!", pos=(40,
40))
        self.Bind(wx.EVT_BUTTON, self.onclick)

    def onclick(self, event):
        print "button clicked"

    def receive_result(self, result):
        print "Hey, I'm done with that long, slow initialization."
        print "The result was:", result


class MyApp(wx.App):
    def __init__(self):
        wx.App.__init__(self, redirect=False)


    def OnInit(self):
        the_frame = MyFrame()
        the_frame.Show()

        t = MyThread(the_frame)
        t.start()   #calls run() in t's class

        return True


class MyThread(threading.Thread):
    def __init__(self, a_frame):
        threading.Thread.__init__(self)

        self.frame_obj = a_frame

    def run(self):
        self.result = self.long_slow_init()

    def long_slow_init(self):
        print "starting long_slow_init()..."
        time.sleep(6)
        result = 20.5

        #Send result to frame:
        wx.CallAfter(self.frame_obj.receive_result, result)

app = MyApp()
app.MainLoop()
----------------------------




From mccredie at gmail.com  Mon Aug 27 12:28:49 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Mon, 27 Aug 2007 09:28:49 -0700
Subject: Image.open( "C:\test.jpg") is this wrong ?
In-Reply-To: <CEFAE560FE3E3C458A2335A1AA37A82D06763937@MAIL2W2K3.WarrenNT.SaintFrancis.Loc>
References: <CEFAE560FE3E3C458A2335A1AA37A82D06763937@MAIL2W2K3.WarrenNT.SaintFrancis.Loc>
Message-ID: <9e95df10708270928j551c6b84r8fd26001d5d52b5@mail.gmail.com>

> Image.open("C:\test.jpg")  # this is what I have right now. And it can't
> find the file or directory. The file is there (it is everywhere on my
> computer now!!!)
>
> I found some code where they apply the file path to a variable in single
> quotes. Is that how it is done. Also I thought single quotes were for
> characters not strings.

In python there is no difference between single and double quotes. You
are close, but the "C:\test.jpg", sees the "\t" as the escape sequence
for `tab'. You can generally use three things:

"C:\\test.jpg" where "\\" is the escape sequence for a single backslash `\'

You can use a raw string: r"C:\test.jpg" which disables escaping.

You can use forward slashes "C:/test.jpg", which might look funny but does work.

Read more here:
http://docs.python.org/tut/node5.html#SECTION005120000000000000000

Matt


From claird at lairds.us  Wed Aug 15 09:37:16 2007
From: claird at lairds.us (Cameron Laird)
Date: Wed, 15 Aug 2007 13:37:16 +0000
Subject: Simple python iteration question
References: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
	<20070814163430.GJ22017@lass.lfod.us>
	<mailman.1974.1187110840.22759.python-list@python.org>
Message-ID: <c5cbp4-6r4.ln1@lairds.us>

In article <mailman.1974.1187110840.22759.python-list at python.org>,
Shawn Milochik <Shawn at Milochik.com> wrote:
			.
			.
			.
>Just for my own sanity: Isn't this the third response advocating the
>use of enumerate()? Did the other responses not get through, or was
>this a time-delay thing?
			.
			.
			.
Yes.

Yes, for a variety of reasons, it's easy for it to happen that
all three-or-more enumerate-responders independently saw the
original question, but not any of their colleagues' responses.

Sometime we'll tell a few Usenet funnies about The Old Days
when transport included tape-backup-driven-by-private-car.


From carsten at uniqsys.com  Thu Aug 30 14:06:34 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 30 Aug 2007 14:06:34 -0400
Subject: list index()
In-Reply-To: <1188495863.242815.236900@o80g2000hse.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
Message-ID: <1188497194.3468.55.camel@dot.uniqsys.com>

On Thu, 2007-08-30 at 10:44 -0700, zzbbaadd at aol.com wrote:
> >
> > How could it not be an exception, in the plain English sense of the
> > word? Most certainly you're asking for the index because you want to do
> > something with the index. If the item is not found, you have no index,
> > so that's a special case that must be handled separately. There is no
> > logical difference between handling that special case in an except
> > clause versus handling it with an if-branch.
> 
> In my case of have done os.listdir() on two directories. I want to see
> what files are in directory A that are not in directory B.
> [...]

list.index() is the wrong tool for that job. Python has sets, use them.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Aug  9 17:26:36 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 09 Aug 2007 23:26:36 +0200
Subject: Querying Graphics Card Name
References: <1186686984.160312.175270@i13g2000prf.googlegroups.com>
Message-ID: <5i1f4cF3mbqqdU1@mid.individual.net>

Benjamin Goldenberg wrote:
> I would like to find out the name of the graphics card of the
> machine my program is running on. I have looked into the pyopengl
> module, and using them to query the card, but it seems like there
> ought to be a simpler way to find this out without setting up a
> glcontext. Does anyone have any ideas?

You could execute glxinfo and look for the renderer string. If
that's sharp enough for your purpose. Another option is lspci.

Regards,


Bj?rn

-- 
BOFH excuse #215:

High nuclear activity in your area.



From http  Fri Aug 17 19:20:53 2007
From: http (Paul Rubin)
Date: 17 Aug 2007 16:20:53 -0700
Subject: Encryption and hashing
References: <1187377630.017794.36510@50g2000hsm.googlegroups.com>
	<mailman.2122.1187379425.22759.python-list@python.org>
	<1187392383.237609.97250@19g2000hsx.googlegroups.com>
Message-ID: <7x1we1eoiy.fsf@ruckus.brouhaha.com>

Kless <jonas.esp at googlemail.com> writes:
> So it haven't Twofish, Serpent, neither Whirlpool. Neither many others.

Unless you have an interoperability requirement or some other specific
issue, you should stick with AES and the SHA2 family.  Don't make your
own cipher selections unless you know completely what you're doing.
This is especially the case for business applications in the US, since
AES and SHA are US federal standards and if you use them and something
goes wrong with them, you can at least say you followed the standard.
If you use anything else, you will have more to answer for.


From arkanes at gmail.com  Wed Aug  1 13:38:29 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 1 Aug 2007 12:38:29 -0500
Subject: Assertion in list comprehension
In-Reply-To: <46b0bb19$0$14060$9b622d9e@news.freenet.de>
References: <1185982643.001546.138180@e16g2000pri.googlegroups.com>
	<mailman.1439.1185985738.22759.python-list@python.org>
	<46b0bb19$0$14060$9b622d9e@news.freenet.de>
Message-ID: <4866bea60708011038h3efec20dl6fe4dbe468970210@mail.gmail.com>

On 01 Aug 2007 16:55:53 GMT, Stargaming <stargaming at gmail.com> wrote:
> On Wed, 01 Aug 2007 11:28:48 -0500, Chris Mellon wrote:
>
> > On 8/1/07, beginner <zyzhu2000 at gmail.com> wrote:
> >> Hi,
> >>
> >> Does anyone know how to put an assertion in list comprehension? I have
> >> the following list comprehension, but I want to use an assertion to
> >> check the contents of rec_stdl. I ended up using another loop which
> >> essentially duplicates the functions of list comprehension. It just
> >> look like a waste of coding and computer time to me.
> >>
> >> I just wish I could put the assertions into list comprehensions.
> >>
> >>         x=[(rec_stdl[0].st/10000.0,
> >>             rec_stdl[0].cl,
> >>             rec_stdl[0].bb,
> >>             rec_stdl[0].bo,
> >>             rec_stdl[1].bb,
> >>             rec_stdl[1].bo,
> >>             rec_stdl[0].ex
> >>            )
> >>            for rec_stdl in rec_by_ex if len(rec_stdl)==2
> >>         ]
> >>
> >>         #duplicated loop
> >>         if __debug__:
> >>             for rec_stdl in rec_by_ex:
> >>                 l=len(rec_stdl)
> >>                 assert(l<=2 and l>0)
> >>                 if l==2:
> >>                     assert(rec_stdl[0].c=="C" and rec_stdl[1].c=="P")
> >>                     assert(rec_stdl[0].ex==rec_stdl[1].ex)
> >>                     assert(rec_stdl[0].st==rec_stdl[1].st)
> >>                     assert(rec_stdl[0].cp==rec_stdl[1].cp)
> >
> > First: All your asserts are wrong. Assert is a statement, not a
> > function. These specific ones will behave as expected, but it's easy to
> > accidentally write ones that always pass this way.
>
> Could you come up with an example? I can only think of accidentally
> injecting a comma, what would create a (true, in a boolean context) tuple.
>
> And, well, if you're only using () for readabilty, this might sometimes
> look messy when calling assert with the extended syntax::
>
>   assert(False), "error text"
>

It's very easy to write this as assert(False, "error text") if you're
in the habit of thinking that assert is a function.

> Where one could expect the construction of a tuple.
>
> > Secondly: This is a waste of code, because if __debug__ is not defined
> > asserts will be skipped by the compiler. You could use the same loop
> > block for both branches.
>
> Well, the `assert` isn't there for no reason, but if you're serious about
> it, `raise` could be better.
>
> > Thirdly: This sort of testing is precisely what unit tests and/or
> > doctests are for.
>
> Huh? What beginner is doing there seems more like input validation than
> testing. Unit or doctests are meant for testing (and in case of doctests,
> showing) whether a function works as expected.

Not in a big __debug__ block it isn't.

> --
> http://mail.python.org/mailman/listinfo/python-list
>


From __peter__ at web.de  Sat Aug  4 06:07:24 2007
From: __peter__ at web.de (Peter Otten)
Date: Sat, 04 Aug 2007 12:07:24 +0200
Subject: How to pass a reference to the current module
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<pan.2007.08.04.01.46.50.985228@REMOVE.THIS.cybersource.com.au>
	<f90lon$av5$1@daisy.noc.ucla.edu>
	<7xtzrg3vof.fsf@ruckus.brouhaha.com>
	<f90tvv$nt7$2@zinnia.noc.ucla.edu>
	<pan.2007.08.04.04.56.18.773038@REMOVE.THIS.cybersource.com.au>
	<g7Xsi.43654$Um6.2191@newssvr12.news.prodigy.net>
Message-ID: <f91j4t$q1d$03$1@news.t-online.com>

James Stroud wrote:

> Yes, those were typos. And to be consistent, the whole listing of the
> configuration file should be (note: 'doit'->do_something_with):
> 
> [foo]
> param1 = float
> param2 = 4
> 
> [option1]
> __module__ = UserDefined1
> __function__ = do_something_with
> param1 = str
> param2 = 30.0
> 
> [doit]
> param1 = float
> param2 = float
> 
> [etc.]
> 
> 
> With the user's main having the following in it:
> 
> from UserDefined1 import some_function
> def foo(): [etc.]
> def doit(): [etc.]


Why don't you just let your userse write

def foo(param1=float, param2=4):
    ...

and dump the config file? Alternatively you can devise a decorator

@declare(float, int)
def foo(param1, param2=4):
    ...

The problem of mapping names to values, be they modules or functions, will
magically vanish.

Peter


From chad at imvu.com  Tue Aug 21 03:01:01 2007
From: chad at imvu.com (Chad Austin)
Date: Tue, 21 Aug 2007 00:01:01 -0700
Subject: GeneratorExit should derive from BaseException, not Exception
In-Reply-To: <fadmm2$m3k$1@sea.gmane.org>
References: <46CA0EFE.6020103@imvu.com> <fadmm2$m3k$1@sea.gmane.org>
Message-ID: <46CA8DAD.6060704@imvu.com>

Hi Terry,

Thank you for your feedback.  Responses inline:

Terry Reedy wrote:
> "Chad Austin" <chad at imvu.com> wrote in message 
> news:46CA0EFE.6020103 at imvu.com...
> || try:
> | result = yield chatGateway.checkForInvite({'userId': userId})
> | logger.info('checkForInvite2 returned %s', result)
> 
> would not
> except GeneratorExit: <do whatever>
> solve your problem?

Yes, we could add an "except GeneratorExit: raise" clause to every place
we currently catch Exception, but I feel like this is one of those
things where it's hard to get it right in all places and also hard to
cover with unit tests.  Instead, we'll have subtle bugs where finally
clauses don't run because the GeneratorExit was swallowed.

Also, SystemExit and KeyboardInterrupt were made into BaseExceptions for
the same reasons as I'm giving.  (As I understand it, anyway.)

> | except Exception:
> 
> Such catchalls are known to be prone to catch too much
> and are therefore not encouraged ;-).
> As in 'use at your own risk'.
> Guido encourages specific catches just for the reasons you give here.

More below:

> There was a *long* discussion of the current 2.5 exception hierarchy on 
> pydev.  Search either python.org's or gmane's archive if you want to pursue 
> this.  But I expect the people involved would say much the same as above.

I've actually read the background on the exception hierarchy (and agree
with it all), especially other suggestions that GeneratorExit derive
from BaseException.  As I understand it, Guido's objections are threefold:

1) The previous "generators as coroutines" examples were too
theoretical:  I've wanted GeneratorExit to derive from BaseException for
months now, but didn't write this proposal until I actually wrote code
that failed in the presence of task cancellation.

2) You should avoid catching everything with except Exception:  I think
that's too idealistic. Just do a search for try: except: through
publicly available Python.  :)  Sometimes, you really _do_ want to catch
everything.  When you're making a network request that involves
xmlrpclib, urllib2, httplib, etc. you don't actually care what the error
was.  (Well, except that the exceptions are submitted for automated
analysis.)  Similarly, when loading a cache file with pickle, I don't
care what went wrong, because it's not critical and should not be turned
into a crash for the user.  (We automatically report exceptions that
bubble into the main loop as crashes.)

3) If GeneratorExit escapes from the generator somehow and gets raised
in the main loop, then it will bubble out of the application like
SystemExit and KeyboardInterrupt would:  I think this argument is
somewhat specious, because I can't imagine how that would happen.  You'd
have to store exceptions in your generator and explicitly bubble them
out somehow.  Our crash handling has to specially handle
KeyboardInterrupt and SystemExit anyway, since there are currently
non-Exception exceptions, such as strings and custom classes that forgot
to derive from Exception, that should count as crashes.

I personally can't think of any cases where I would _want_ to handle
GeneratorExit.  I just want finally: and with: clauses to do the right
thing when a task is cancelled.  Anyway, I haven't yet encountered any
serious bugs due to this yet...  I'm just worried that if a task is
holding some resource and blocking on something, then the resource won't
get released.  If this really does come up, then I do have a little bit
of python + ctypes that replaces GeneratorExit with ImvuGeneratorExit
(deriving from BaseException), but that's not very appealing.

Thanks again,

-- 
Chad Austin
http://imvu.com/technology



From wpdster at gmail.com  Thu Aug  9 09:12:51 2007
From: wpdster at gmail.com (Patrick Doyle)
Date: Thu, 9 Aug 2007 09:12:51 -0400
Subject: check if regeular expression has results
In-Reply-To: <1186664302.050036.302670@g4g2000hsf.googlegroups.com>
References: <1186664302.050036.302670@g4g2000hsf.googlegroups.com>
Message-ID: <e2a1d0aa0708090612l2ed06baeo3aa4fd083f713683@mail.gmail.com>

On 8/9/07, shahargs at gmail.com <shahargs at gmail.com> wrote:
> Hi,
> I'm looking for the best way to check if regular expression return
> true (it's mean - there is a match). for example, i want "if" that
> check if this regular expression: .*born.*to.* has a match.
>
> What's the way to do that simply?
>
How about

import re
re.match(".*born.*to", "This is a test")
re.match(".*born.*to.*", "This test was born so that it worked too.")

(Try these at the python prompt)

The first call to 're.match()' returns 'None' which will fail an if
test.  The second one returns a match object, which evaluates to TRUE
in an if test.

--wpd


From justin at sevenfiveo.com  Sun Aug  5 10:45:54 2007
From: justin at sevenfiveo.com (Justin Donato)
Date: Sun, 5 Aug 2007 10:45:54 -0400
Subject: RDF Library / Py 2.5
Message-ID: <200708051445.l75EjwRV023663@mail3.webfaction.com>

Hello,

 

Can I install the win32 binaries for the Redland RDF library if I have
Python 2.5 installed? The latest .exe that I can find is for Python 2.4.

HYPERLINK "http://librdf.org/"http://librdf.org/

 

(I?m new to Python and this list.)

 

-Justin


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From roy at panix.com  Fri Aug 31 20:23:23 2007
From: roy at panix.com (Roy Smith)
Date: Fri, 31 Aug 2007 20:23:23 -0400
Subject: So what exactly is a complex number?
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<46d89ba9$0$30380$9b4e6d93@newsspool4.arcor-online.net>
Message-ID: <roy-FD4B98.20232331082007@news.panix.com>

Wildemar Wildenburger <lasses_weil at klapptsowieso.net> wrote:
> Again, that is just one way to interpret them. Complex numbers are not 
> vectors (at least no moe than real numbers are).

OK, let me take a shot at this.

Math folks like to group numbers into sets.  One of the most common sets is 
the set of integers.  I'm not sure what the formal definition of an integer 
is, but I expect you know what they are: 0, 1, 2, 3, 4, etc, plus the 
negative versions of these: -1, -2, -3, etc.

The set of integers have a few interesting properties.  For example, any 
integer plus any other integer gives you another integer.  Math geeks would 
say that as, "The set of integers is closed under addition".

Likewise for subtraction; any integer subtracted from any other integer 
gives you another integers.  Thus, the set of integers is closed under 
subtraction as well.  And multiplication.  But, division is a bit funky.  
Some integers divided by some integers give you integers (i.e. 6 / 2 = 3), 
but some done (i.e. 5 / 2 = 2.5).

So, now we need another kind of number, which we call reals (please, no nit 
picking about rationals).  Reals are cool.  Not only are the closed under 
addition, subtraction, and multiplication, but division too.  Any real 
number divided by any other real number gives another real number.

But, it's not closed over *every* possible operation.  For example, square 
root.  If you take the square root of 4.23, you get some real number.  But, 
if you try to take the square root of a negative number, you can't do it.  
There is no real number which, when you square it, gives you (to use the 
cannonical example), -1.  That's where imaginary numbers come in.  The math 
geeks invented a wonderful magic number called i (or sometimes j), which 
gives you -1 when you square it.

So, the next step is to take an imaginary number and add it to a real 
number.  Now you've got a complex number.  There's all kinds of wonderful 
things you can do with complex numbers, but this posting is long enough 
already :-)


From michele.simionato at gmail.com  Mon Aug 13 02:09:43 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Mon, 13 Aug 2007 06:09:43 -0000
Subject: decorators - more than just syntactic sugar
In-Reply-To: <46be005e$0$13866$ba620e4c@news.skynet.be>
References: <46be005e$0$13866$ba620e4c@news.skynet.be>
Message-ID: <1186985383.303334.110230@19g2000hsx.googlegroups.com>

On Aug 11, 8:30 pm, Helmut Jarausch <jarau... at skynet.be> wrote:
> Hi,
>
> are decorators more than just syntactic sugar in python 2.x and what
> about python 3k ?

Well, I argued may times that syntactic sugar is important (all Turing
complete languages differs by syntactic sugar only) and having or not
having
a given syntactic sugar makes a difference between writing and not
writing
a given program. Having decorators in core Python makes us think
differently.
Have a look at David Mertz article

http://www.ibm.com/developerworks/linux/library/l-cpdecor.html

   Michele Simionato



From cajnnjonaj at fjireanjtjprodjuctijons.com  Tue Aug 21 11:36:38 2007
From: cajnnjonaj at fjireanjtjprodjuctijons.com (Aaron)
Date: Tue, 21 Aug 2007 10:36:38 -0500
Subject: I Need help from all the group participants
References: <fac7nj$ci9$1@localhost.localdomain>
Message-ID: <s1Eyi.6409$r5.4111@fe111.usenetserver.com>

"Boris Ozegovic" <ninja.krmenadl at nes.com> wrote in message 
news:fac7nj$ci9$1 at localhost.localdomain...
> Hi,
>
> I am working on some system, and the communication will take place through
> the chatterbot which will be written in AIML (interpreter is written in
> Python).  English is not my mother tongue, so I need huge favor:  if all 
> of
> you can write two sentences, so that I could have greater pattern base.
> The first sentence is finding someone's heart rate, example: "Please, can
> you tell me John's heart rate", and the other one is setting the alarm 
> when
> someone's heart rate is lower then x, and greater than y, example: "Can
> you, please, send me information when John's heart rate is lower than 60,
> and greater than 100".  You can manipulate time (right now, now, right 
> this
> moment), and everything else you can think about.
>


Give me John's heart rate.
John's heart rate?
John's pulse?
John's pulse is?
(The last three are not exactly complete sentences.  Rather they are 
fragments, but who cares when you're talking to a computer, right?)

Tell me when John's heart rate drops below x or goes above y.
Tell could be replaced with notify me, alert me, call me, or any other verbs 
that describe how the computer might contact the person.
Drops below could be replaced with "goes below", "is less than" "slows to" 
"slows down to" "drops to" "decreases to" "goes down to" ETC.
"goes above" could be "exceeds" "passes" "goes past" "increases to" "speeds 
up to" "goes up to" "reaches" "exceeds" "surpasses" "is faster than" "goes 
faster than" "is above" ETC.

Good luck.  I'm glad this isn't my project.

Aaron

-- 
To reply directly, remove j's from email address. 





From lionchao at gmail.com  Fri Aug 24 15:14:42 2007
From: lionchao at gmail.com (Eric CHAO)
Date: Fri, 24 Aug 2007 20:14:42 +0100
Subject: IDE for Python
In-Reply-To: <46CAB7D4.5070308@gmail.com>
References: <46CAB7D4.5070308@gmail.com>
Message-ID: <de6dc4a00708241214xc843542j1b59175c98ffaf74@mail.gmail.com>

I think many python developers don't need such an IDE actually. Just
like Ruby guys, they use a powerful editor, for example, Textmate,
instead of all-in-one IDE. It's quick and direct.

On 8/21/07, Joel Andres Granados <joel.granados at gmail.com> wrote:
> Hello list:
>
> I have tried various times to use an IDE for python put have always been
> disapointed.
> I haven't revisited the idea in about a year and was wondering what the
> python people
> use.
> I have also found http://pida.co.uk/main as a possible solution.  Anyone
> tried it yet?
>
> suggestions.
> Regards
> Joel Andres Granados
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>


From twisted0n3 at gmail.com  Sun Aug 19 23:02:07 2007
From: twisted0n3 at gmail.com (Twisted)
Date: Mon, 20 Aug 2007 03:02:07 -0000
Subject: Xah's Edu Corner: Under the spell of Leibniz's dream
In-Reply-To: <1187567809.896668.228650@z24g2000prh.googlegroups.com>
References: <1187567809.896668.228650@z24g2000prh.googlegroups.com>
Message-ID: <1187578927.945921.280180@q4g2000prc.googlegroups.com>

On Aug 19, 7:56 pm, Xah Lee <x... at xahlee.org> wrote:
> So, when you "dress up formally" to attend your friend's wedding...

Oh dear God, please *don't* remind me.

> "Under the spell of Leibniz's dream" (2000) By Edsger W Dijkstrahttp://www.cs.utexas.edu/~EWD/ewd12xx/EWD1298.PDF

A link to a copy in a non-toxic format would be nice.



From martin at v.loewis.de  Wed Aug 22 01:04:58 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 22 Aug 2007 07:04:58 +0200
Subject: Python 2.51 install on Vista "files in use"
In-Reply-To: <dcOdnZobNrajFVbbnZ2dnUVZ_gKdnZ2d@comcast.com>
References: <dcOdnZobNrajFVbbnZ2dnUVZ_gKdnZ2d@comcast.com>
Message-ID: <46CBC3FA.20606@v.loewis.de>

Steve Mavronis schrieb:
> I tried to install Python 2.51 on Microsoft Vista Ultimate 32-bit
> because I use the 3D modeler software Blender 2.44, in case I needed
> additional Python support in the future for add-on scripts.
> 
> I got a warning about "files in use" during installation that needed
> updating. I aborted the install since the files were Intel Viiv and
> Microsoft Vista Media Center related so didn't want to mess them up. Can
> someone explain why Python wants to update those files?

I think you misinterpreted the message. It's not that Python wanted to
update Intel Viiv or Microsoft Vista Media Center; instead, it wants
to update files that are used both by Python and by these software
packages. Unfortunately, Microsoft installer does not put information
into the UI which specific files conflict.

About the only file I can imagine that both these software packages and
Python would use, and which Python might update, is the Microsoft C
runtime library, msvcr71.dll. If so, doing the update should be
harmless: the update is only performed when the version of the DLL that
comes with Python is more recent than the one installed on the sysem,
and Microsoft promises that the newer version will be fully compatible
with the older one.

Regards,
Martin


From ladaan at iptel.org  Thu Aug 23 14:16:45 2007
From: ladaan at iptel.org (Ladislav Andel)
Date: Thu, 23 Aug 2007 20:16:45 +0200
Subject: comparing two lists
In-Reply-To: <fakgtj$c3d$00$1@news.t-online.com>
References: <mailman.180.1187886381.32294.python-list@python.org>
	<fakgtj$c3d$00$1@news.t-online.com>
Message-ID: <46CDCF0D.9090605@iptel.org>

Peter Otten wrote:
> Ladislav Andel wrote:
>
>   
>> what would be the most efficient way to do following?
>>
>> I have a list of dictionaries  taken from DB e.g.
>> dblist = [{'id:1, 'host':'google.com','ip_address':'1.2.3.4'},
>> {'id:3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
>> {'id:9, 'host':'msn.com','ip_address':'11.3.2.3'}]
>>
>> and list of object instances in memory(it's just for example)
>> which are looping within itself and testing particular hosts
>>
>> memlist = [<instance 1>,<instance 2>]
>> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
>> memlist[1].id  is 9 and  memlist[1].host is msn.com etc.
>>
>> Now I want to add a new instance to memlist since id=3(in dblist) is not
>> in memlist.
>> How would you iterate through it and insert a new instance?
>>
>> The result should be:
>> memlist = [<instance 1>,<instance 2>, <instance 3>]
>> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
>> memlist[1].id  is 3 and  memlist[1].host is yahoo.com etc.
>> memlist[2].id  is 9 and  memlist[2].host is msn.com etc.
>>     
>
> You should replace the memlist with a dictionary using (host, id) tuples as
> the keys. Here's an example that uses a set but requires you to modify the
> <instance N> class:
>
> dblist = [{'id':1, 'host':'google.com','ip_address':'1.2.3.4'},
> {'id':3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
> {'id':9, 'host':'msn.com','ip_address':'11.3.2.3'}]
>
> class Item(object):
>     def __init__(self, id, host, **discarded):
>         self._tuple = (id, host)
>     def __hash__(self):
>         return hash(self._tuple)
>     def __eq__(self, other):
>         return self._tuple == other._tuple
>     def __repr__(self):
>         return "Item(id=%r, host=%r)" % self._tuple
>
> items = set([Item(1, "google.com")])
> for d in dblist:
>     item = Item(**d)
>     if item not in items:
>         print "adding", item
>         items.add(item)
>     else:
>         print item, "already there"
>
>   
Thank you for this nice solution. I wouldn't be able to write it this 
way at all
but what about removing from memlist if there is less items in dblist 
than in items (instances)?
I will have to iterate over items(instances) and remove that one which 
is not in dblist I guess.

Lada

> Peter
>   



From antroy at gmail.com  Fri Aug 10 07:07:35 2007
From: antroy at gmail.com (Ant)
Date: Fri, 10 Aug 2007 04:07:35 -0700
Subject: Smoother Lines in Turtle Graphics
In-Reply-To: <5i2tnaF3mgsofU1@mid.uni-berlin.de>
References: <1186703789.695265.52390@e9g2000prf.googlegroups.com>
	<5i2tnaF3mgsofU1@mid.uni-berlin.de>
Message-ID: <1186744055.367994.61850@g12g2000prg.googlegroups.com>

On Aug 10, 11:41 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> tomy wrote:
> > Hi All
...
> What turtle graphics? I'm not aware that there is some
> standard-turtle-graphics available, so it might be a problem of your
> turtle-graphics-package.
>
> Diez

import turtle

Its part of the standard Library! I don't know the answer to the OP's
question mind you, I'd played around a little with it a while ago, but
nothing more.

Python: Batteries and Turtles included!

--
Ant...

http://antroy.blogspot.com/






From johnmfisher at comcast.net  Mon Aug 13 18:16:01 2007
From: johnmfisher at comcast.net (John Fisher)
Date: Mon, 13 Aug 2007 15:16:01 -0700
Subject: (sort of) deterministic timing in Python
Message-ID: <1i2si8h.1qc8f77i68gyeN%johnmfisher@comcast.net>

I am working on a framework for data acquisition in Python 2.5, am
trying to get a structure going more like this:


mark start time
start event
        event finishes
count time until next interval
start second event?

rather than this:

start event
        event finishes
sleep for interval
start second event

Do you see the difference? I get a true fixed interval from the first,
including the time to accomplish the event task(s). In the second case,
the sleep just gets tacked on at the end of the events, not very
deterministic (timing-wise).

So how do I accomplish this in Python with a minimum of labour?

Thanks for any light you can shed on my darkness...

wave_man


From ratchetgrid at googlemail.com  Sun Aug 12 20:04:40 2007
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Mon, 13 Aug 2007 01:04:40 +0100
Subject: Complexity of methods etc
Message-ID: <676224240708121704i5923bf2fvceb391559339146e@mail.gmail.com>

Hi,

I was wondering if anyone knew of any resources, where I might be able
to find information about the complexity of certain python functions
or little tips on how to reduce complexity. I mean like the "".join(),
kind of thing?

I want to see if there are any improvements I can add to my coding in
order to reduce  time/space usage/

Many Thanks in advance

Nathan


From chrispwd at gmail.com  Wed Aug  1 14:31:18 2007
From: chrispwd at gmail.com (chrispwd at gmail.com)
Date: Wed, 01 Aug 2007 11:31:18 -0700
Subject: Buffering HTML as HTMLParser reads it?
Message-ID: <1185993078.651180.298620@19g2000hsx.googlegroups.com>

Hello,

I am working on a project where I'm using python to parse HTML pages,
transforming data between certain tags. Currently the HTMLParser class
is being used for this. In a nutshell, its pretty simple -- I'm
feeding the contents of the HTML page to HTMLParser, then I am
overriding the appropriate handle_ method to handle this extracted
data. In that method, I take the found data and I transform it into
another string based on some logic.

Now, what I would like to do here is take that transformed string and
put it "back into" the HTML document. Has anybody ever implemented
something like this with HTMLParser?

I'm thinking maybe somehow have HTMLParser append each character it
reads except for data inside tags in some kind of buffer? This way I
can have the HTML contents read into a buffer, then when I do my own
handle_ overrides, I can also append to that buffer with the
transformed data. Once the HTML page is finished parsing, ideally I
would be able to print the contents of the buffer and the HTML would
be identical except for the string transformations.

I also need to make sure that all newlines, tags, spacing, etc are
kept in tact -- this part is a requirement for other reasons.

Thanks!



From heba.farouk at yahoo.com  Thu Aug 16 02:18:24 2007
From: heba.farouk at yahoo.com (Heba Farouk)
Date: Wed, 15 Aug 2007 23:18:24 -0700 (PDT)
Subject: Localizing numbers in python
Message-ID: <681797.41390.qm@web31708.mail.mud.yahoo.com>

Hello 
i would like to localize numbers in python according to the current selected language of the web page (English, french, arabic, ...), is there any options in python??

thanks in advance


Yours 

Heba

       
---------------------------------
Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. 
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From xah at xahlee.org  Sun Aug 19 19:56:49 2007
From: xah at xahlee.org (Xah Lee)
Date: Sun, 19 Aug 2007 16:56:49 -0700
Subject: Xah's Edu Corner: Under the spell of Leibniz's dream
Message-ID: <1187567809.896668.228650@z24g2000prh.googlegroups.com>

Dear computing comrades,

Today, i'd like to show you a piece of literature written by a eminent
mathematician Edsger W Dijkstra.

Here's 2 interesting quote from his letter:

?The prevaling attitude was reflected in the creation of two literary
figures ? admittedly of rather poor literature, but nevertheless of
great paralyzing power ?, viz. ?the average programmer? and ?the
casual user?. Up to these days, academic research in programming
methodology has been supposed to respect the severe intellectual
limitations of these fictitious morons: consequently any proposal that
required any further education of the programming person was out.?

?... On the other hand we should be glad that the gospel of design by
derivation rather by trial and error is still preached.?

I happened to read it today. And, i think in your busy schedule of
checking out slashdot and blogging and driveling with your excitement
and concerns about current fashions and trends with your fellow peers
and factions; It is good once in a while to read something
unfashionable and not for-dummies.

This letter of EWD is about 16 pages.

Is somewhat a quaint rant. The first half i find interesting but
without much sympathy, perhaps because the author is mostly talking
about the situation in the mid 1990s, of which, i'm unfamiliar and too
early a period to touch me personally. But the latter part of the
letter, i find much empathy and concurrence. In particular, his
remarks related to the formal methods.

(for you math illiterates out there: the ?formal? here does not mean
the opposite of ?informal?, as in ?formal dress? vs ?informal dress?.
Rather, ?formal? here means ?mathematical reasoning by symbol
manipulation; the ?FORM? in math FORMulas?. (for you mathematicians
out there: the root of the word ?formal? as in ?formal dress? and
?formalism?, actually are the same. They both refers to ?form? as in a
empty shell, appearance.)) (So, when you ?dress up formally? to attend
your friend's wedding or death ceremony, it literally means you are
putting on a appearance.)

Now, without further ado, the article is at:

?Under the spell of Leibniz's dream? (2000) By Edsger W Dijkstra
http://www.cs.utexas.edu/~EWD/ewd12xx/EWD1298.PDF

  Xah
  xah at xahlee.org
? http://xahlee.org/



From cousinstanley at gmail.com  Sat Aug  4 21:59:42 2007
From: cousinstanley at gmail.com (Cousin Stanley)
Date: Sat, 04 Aug 2007 20:59:42 -0500
Subject: Efficient Rank Ordering of Nested Lists
References: <1186104049.022836.253470@e9g2000prf.googlegroups.com>
	<1i29gpw.1vh7eku1iauistN%aleax@mac.com>
Message-ID: <1186279182_8217@sp12lax.superfeed.net>


> ....
> "beginner"'s advice to use a dictionary is also good 
> and may turn out to be faster, just because dicts are 
> SO fast in Python -- but you need to try and measure 
> both alternatives.  
>
> One way to use a dict ( warning, untested code ) :

  def rank_list( single_list ) :

      d = { }

      for i , item in reversed( enumerate( sorted( single_list ) ) ) :

          d[ item ] = i

      return [ d[ item ] for item in single_list ]


Alex .... 

  I tested it but I don't know how to fix it .... :-)

  Both Pablo's original version and Neil's version work
  but I get the following traceback from your version ....

Traceback (most recent call last):
  File "list_nested_rank.py", line 100, in <module>
    test_01( list_source )
  File "list_nested_rank.py", line 87, in test_01
    list_print( this_func( list_source ) )
  File "list_nested_rank.py", line 62, in rank_lists_02
    return map( rank_list , nested_list )
  File "list_nested_rank.py", line 56, in rank_list
    for i , item in reversed( enumerate( sorted( single_list ) ) ) :
TypeError: argument to reversed() must be a sequence



-- 
Stanley C. Kitching
Human Being
Phoenix, Arizona


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From claird at lairds.us  Fri Aug 10 10:14:26 2007
From: claird at lairds.us (Cameron Laird)
Date: Fri, 10 Aug 2007 14:14:26 +0000
Subject: The Future of Python Threading
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<5i329uF3muir4U1@mid.individual.net>
Message-ID: <2f8uo4-d4j.ln1@lairds.us>

In article <5i329uF3muir4U1 at mid.individual.net>,
Bjoern Schliessmann  <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote:
>Justin T. wrote:
>
>> The detrimental effects of the GIL have been discussed several
>> times and nobody has ever done anything about it. 
>
>Also it has been discussed that dropping the GIL concept requires
>very fine locking mechanisms inside the interpreter to keep data
>serialised. The overhead managing those fine ones properly is not
>at all negligible, and I think it's more than managing GIL.
>
>> The truth is that the future (and present reality) of almost every
>> form of computing is multi-core,
>
>Is it? 8)
			.
			.
			.
I reinforce some of these points slightly:
A.  An effective change to the GIL impacts not just
    Python in the sense of the Reference Manual, but
    also all its extensions.  That has the potential
    to be a big, big cost; and
B.  At least part of the attention given multi-core
    processors--or, perhaps more accurately, the
    claims that multi-cores deserve threading re-
    writes--smells like vendor manipulation.


From nytrokiss at gmail.com  Wed Aug  1 12:25:36 2007
From: nytrokiss at gmail.com (James Matthews)
Date: Wed, 1 Aug 2007 09:25:36 -0700
Subject: calling a .net application from Python 2.5
In-Reply-To: <1185959694.045149.214050@19g2000hsx.googlegroups.com>
References: <1185959694.045149.214050@19g2000hsx.googlegroups.com>
Message-ID: <8a6b8e350708010925t56d107a0md38a8fc1f750898d@mail.gmail.com>

http://pythonnet.sourceforge.net/

On 8/1/07, Acm <alextabone at gmail.com> wrote:
>
> I am working with Python 2.5.
>
> I would like to know how to call a .NET application (or .dll) from a
> Python script.
>
> Can anyone help please?
>
> Thank you.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.goldwatches.com/
http://www.jewelerslounge.com
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From gherzig at fmed.uba.ar  Thu Aug 16 18:30:07 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Thu, 16 Aug 2007 19:30:07 -0300
Subject: advice about `correct' use of decorator
In-Reply-To: <2vydnTio1a9IWlnbnZ2dnUVZ_jKdnZ2d@comcast.com>
References: <mailman.2074.1187294411.22759.python-list@python.org>
	<2vydnTio1a9IWlnbnZ2dnUVZ_jKdnZ2d@comcast.com>
Message-ID: <46C4CFEF.7020809@fmed.uba.ar>

Steven Bethard wrote:

>Gerardo Herzig wrote:
>  
>
>>Hi all. I guess i have a conceptual question:
>>Im planing using a quite simple decorator to be used as a conditional 
>>for the execution of the function. I mean something like that:
>>
>>@is_logued_in
>>def change_pass():
>>   bla
>>   bla
>>
>>And so on for all the other functions who needs that the user is still 
>>loged in.
>>
>>where obviosly the is_logued_in() function will determine if the dude is 
>>still loged in, and THEN execute change_pass(). If the dude is not loged 
>>in, change_pass() is NOT executed at all. Instead, it will be redirected 
>>to the `login' screen.
>>
>>Something in my mind tells me that this is not the pythonic way...But i 
>>like the idea, so please tell me that im in the right way :)
>>    
>>
>
>Django does it almost exactly this way:
>
>http://www.djangoproject.com/documentation/authentication/#the-login-required-decorator
>
>STeVe
>  
>
Great! So from now on, my idea is labeled as `djangothic' :)
Thanks a lot!

Gerardo


From enleverlesX.XmcX at XmclaveauX.com  Mon Aug 27 13:31:46 2007
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI (MVP))
Date: Mon, 27 Aug 2007 19:31:46 +0200
Subject: How to free memory ( ie garbage collect) at run time with Python
	2.5.1(windows)
References: <1188224306.863247.127890@50g2000hsm.googlegroups.com>
	<mn.dbf07d78329985f0.46195@XX.XmclaveauX.com>
Message-ID: <46d30b62$0$5100$ba4acef3@news.orange.fr>

Re! 

Sended by direct (private) e-mail

@+

Michel Claveau






From joshua at eeinternet.com  Wed Aug  1 17:45:51 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 01 Aug 2007 13:45:51 -0800
Subject: Wing IDE for Python v. 3.0 beta1 released
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
Message-ID: <f8quug$m7j$1@sea.gmane.org>

On Wednesday 01 August 2007 13:28, John K Masters wrote:

> On 15:34 Tue 31 Jul     , Wingware wrote:
>> Hi,
>> 
>> I'm happy to announce the first beta release of Wing IDE 3.0.  It is
>> available from http://wingware.com/wingide/beta
> If their support for paid customers is anything like their support for
> prospective customers then I would leave well alone.

I've had excellent support from them.  I'm sorry to hear your experiences
have not been stellar.  Questions submitted to the bug or comment list
usually get a response in one day or less.  And there are frequently
respones by WingWare people to just about every question asked on the
WingWare mailing list.

> I have been trying wing for a few days but have noticed that
> auto-completion does not work on all modules. I submitted this to wing
> and was told that probably my PYTHONPATH was wrong.

It may also not work if the IDE isn't sure what kind of object you are
dealing with.  You can "clarify" this as documented with an
assert(isinstance()) statement.

> I subsequently submitted a question about the licensing, i.e. whether I
> could use wing on a home setup using Debian Etch, where I develop my
> apps, and a work setup, using Debian Etch, with no net access.

>From http://www.wingware.com/wingide/license:

"Each Wing IDE user may run Wing on as many machines as needed for their own
work, for all the operating systems which they have licensed. In order to
reduce casual license sharing, which is a unfortunately a problem for small
businesses like Wingware, licenses must be activated after installation on
each machine."

"We've worked hard to make this flexible and forgiving for valid customers.
For example, reinstalling an OS and/or altering hardware usually should not
break your activation. Also, activation can be done directly from Wing IDE
and off-line activation is available if your machine does not have TCP port
80 (http) access to wingware.com. Each license is allowed three activations
by default and more can be obtained on request from identifiable
customers."

> So far I have had no response

I tend to let questions slide when they are answered in the documentation or
on the web site.  Maybe the Wing developers/support personnel are the same
way.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From steveo at syslang.net  Tue Aug 14 10:24:31 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Tue, 14 Aug 2007 10:24:31 -0400 (EDT)
Subject: Question about FutureWarning
Message-ID: <alpine.LFD.0.999.0708141009170.24459@saturn.syslang.net>

I have module M1 which has the following line in it:

   StartTime   = safe_dict_get ( dic, 'starttime', 0xFFFFFFFF )

It gets imported by modules M2 and M3. And finally, M4 imports both M2 and 
M3.

M4
  |\M3
  | |\M1
  |\M2
  | |\M1

I'm building a .deb file which means I have to compile the modules into 
.pyc and .pyo files.

The compile command I use is

python=/usr/bin/python2.3
i_python ()
{
     $python -c "import $1"
     $python -O -c "import $1"
}
i_python M1
i_python M2
i_python M3
i_python M4

When M1 is compiled, there's no problem. The same for when I compile M2 
and M3. But when M4 is compiled, I get the following message:

M1.py:268: FutureWarning: hex/oct constants > sys.maxint will 
return positive values in Python 2.4 and up
   StartTime   = safe_dict_get ( dic, 'starttime', 0xFFFFFFFF )

I get the message twice, ostensibly because of M3 and M2.

I was able to shut off the warning by adding the following lines *before* 
the import in M4.

import warnings
warnings.filterwarnings('ignore', category=FutureWarning)

My question is this: Why can the warning not be shut off by putting the 
two lines in M1?

TIA

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From carsten at uniqsys.com  Thu Aug 30 14:11:38 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 30 Aug 2007 14:11:38 -0400
Subject: list index()
In-Reply-To: <1188496588.750629.208100@g4g2000hsf.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<1188496588.750629.208100@g4g2000hsf.googlegroups.com>
Message-ID: <1188497498.3468.60.camel@dot.uniqsys.com>

On Thu, 2007-08-30 at 10:56 -0700, zzbbaadd at aol.com wrote:
> On Aug 30, 12:42 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> > zzbba... at aol.com a crit :
> >
> 
> > What's with using your brain instead of whining ?
> 
> I knew there would be at least one religious zealot.

While I agree that Bruno's response was perhaps needlessly snippy, your
original question was needlessly inflammatory, as if you somehow wanted
some "religious zealot" to act the way Bruno did. If we start labeling
people, this thread will earn you a label that rhymes with "roll".

-- 
Carsten Haese
http://informixdb.sourceforge.net




From paul at boddie.org.uk  Wed Aug  1 18:56:23 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 01 Aug 2007 15:56:23 -0700
Subject: force unicode strings
In-Reply-To: <46B0EEFD.1090709@web.de>
References: <5hbmjcF3gtt39U1@mid.individual.net><46B0EEFD.1090709@web.de>
Message-ID: <1186008983.150396.304000@r34g2000hsd.googlegroups.com>

Stefan Behnel wrote:
>
> I guess you can't afford to wait for Python 3, can you?
>
> http://www.python.org/dev/peps/pep-3100/#atomic-types

No need to: just start python with the -U option:

Python 2.4.1 (#2, Oct  4 2006, 16:53:35)
[GCC 3.3.5 (Debian 1:3.3.5-8ubuntu2.1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> "???"
u'\xe6\xf8\xe5'

It's just like Jython:

Jython 2.1 on java1.5.0_03 (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> "???"
'\xE6\xF8\xE5'

That's a Unicode object, really. Various IronPython users have pointed
out similar things, too, but this kind of thing has been going on for
about ten years, I guess.

Paul



From airconditi at gmail.com  Tue Aug 14 17:54:00 2007
From: airconditi at gmail.com (airconditi at gmail.com)
Date: Tue, 14 Aug 2007 14:54:00 -0700
Subject: Tuned cars
Message-ID: <1187128440.369048.255470@r34g2000hsd.googlegroups.com>

Cool cars, tuning & styling, here you can find many tuned cars with
tons of pictures!!!!!!!

http://tuning-styling.blogspot.com/



From daniels at dsl-only.net  Wed Aug 22 23:53:23 2007
From: daniels at dsl-only.net (Scott David Daniels)
Date: Wed, 22 Aug 2007 20:53:23 -0700
Subject: introspection and functions
In-Reply-To: <1187819949.515982.15450@r23g2000prd.googlegroups.com>
References: <1187819949.515982.15450@r23g2000prd.googlegroups.com>
Message-ID: <13cq14sd11959fb@corp.supernews.com>

yagyala wrote:
> Hi. I would like to be able to tell, at run time, how many parameters
> a function requires. Ideally I would like to be able to tell which are
> optional as well. I've tried looking at the functions attributes, but
> haven't found one that helps in this. How can I do this?
> 
> Thanks
> 
This really only will work for those functions that are simply
constructed.  You are better off not trying to do this, or code
like the following will confound your code:

     from functools import partial

     def somefunction(a=23, b=14, c='hi'):
         print 'Finally'

     f = partial(somefunction, b=13)
     g = partial(f, a=19)
     h = partial(g, c=123)
     print whatargs(h)


From v_ashe at btinternet.com  Fri Aug  3 12:31:49 2007
From: v_ashe at btinternet.com (Vaughan V Ashe)
Date: Fri, 3 Aug 2007 17:31:49 +0100
Subject: Using cursor.callproc with zxJDBC
Message-ID: <104F88F15D1E430B96FF79E35FE6B84D@VVA>

Hi 

We would like to use the store proc. We are using a postgreql database. what we have working so far is:

params = [4,4,2]

curs.callproc("update_job_status",params)

db.commit()


#print db

#print curs.description

result = curs.fetchall()

if result == 1:

    print "good one"

else:

    print "shite"



we are using the beta version of jython. Would be very happy to get a response from you



Regards



Vaughan
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From zyzhu2000 at gmail.com  Thu Aug 16 18:35:50 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Thu, 16 Aug 2007 22:35:50 -0000
Subject: How to say $a=$b->{"A"} ||={} in Python?
Message-ID: <1187303750.590497.208060@x40g2000prg.googlegroups.com>

Hi All.

I'd like to do the following in more succint code:

if k in b:
    a=b[k]
else:
    a={}
    b[k]=a

a['A']=1


In perl it is just one line: $a=$b->{"A"} ||={}.

Thanks,
Geoffrey



From paul at boddie.org.uk  Fri Aug  3 20:34:49 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Fri, 03 Aug 2007 17:34:49 -0700
Subject: Bug in time, part 2
In-Reply-To: <mailman.1541.1186091110.22759.python-list@python.org>
References: <mailman.1541.1186091110.22759.python-list@python.org>
Message-ID: <1186187689.624149.105290@d55g2000hsg.googlegroups.com>

Joshua J. Kugler wrote:
> Or could I entitle this, "A Wrinkle in time.py," with apologies to Madeleine
> L'Engle.  Either I've found a bug (or rather room for improvement) in
> time.py, or I *really* need a time module that doesn't assume so much.

I'd be inclined to use the datetime module to avoid certain underlying
library assumptions. I originally tried to retrace your steps and make
comments about what is going on, but the UNIX time API is so bizarre
that it's better for me to suggest a few things instead.

First of all, you managed to get things working nicely in a GMT/UTC
environment. Sadly, the time module doesn't provide all the functions
you'd need to work with UTC without such hacks as calling tzset,
although I've been trying to refine some patches which do provide such
functions - see this link for more details:

https://sourceforge.net/tracker/?func=detail&atid=305470&aid=1667546&group_id=5470

Although I suggested setting tm_isdst to zero previously, I'm more
convinced now that it's quite difficult to do the right thing with
such simple measures alone. Again, the time module doesn't provide
access to timezone offsets on individual time structures in its
current form, nor does it support the %z format option for strftime
and strptime, although the patches mentioned above do provide it; both
of these things provide the foundations to convert localtimes to UTC
times and to convert back only when needed, a bit like the way you're
supposed to work with Unicode and only produce specific textual
encodings once you're finished.

[...]

Anyway, here are some suggestions:

In your original test case (or problem), it looked like you were
seeing a DST "boundary" which then made the times appear further apart
than they actually were. Adjusting this test case for my timezone, I
can reproduce the issue but then add the %z format option (see the
patches) to demonstrate that with access to timezone offsets there's
nothing really wrong:

>>> nondst = time.mktime(time.strptime('2007-03-25 02:00:00', '%Y-%m-%d %H:%M:%S'))
>>> dst = time.mktime(time.strptime('2007-03-25 03:00:00', '%Y-%m-%d %H:%M:%S'))
>>> time.strftime('%Y-%m-%d %H:%M:%S %z', time.localtime(nondst))
'2007-03-25 03:00:00 +0200'
>>> time.strftime('%Y-%m-%d %H:%M:%S %z', time.localtime(dst))
'2007-03-25 03:00:00 +0200'

Certainly, the localtime (with undecided timezone) of 2am on 25th
March gets converted to the DST timezone, but we can be more specific
and make informed guesses as to what happens:

>>> nondst = time.mktime(time.strptime('2007-03-25 02:00:00 CET', '%Y-%m-%d %H:%M:%S %Z'))
>>> time.strftime('%Y-%m-%d %H:%M:%S %Z', time.localtime(nondst))
'2007-03-25 03:00:00 CEST'

And trying with 1:59am gives us what we'd expect:

>>> nondst = time.mktime(time.strptime('2007-03-25 01:59:00', '%Y-%m-%d %H:%M:%S'))
>>> time.strftime('%Y-%m-%d %H:%M:%S %Z', time.localtime(nondst))
'2007-03-25 01:59:00 CET'

Now, we might like to avoid dealing with localtime altogether, and for
such work I've introduced a function called mktimetz which attempts to
use the timezone offset to calculate a time value which works with
localtime and gmtime mostly without surprises - something which mktime
doesn't guarantee. However, since strptime tends to sit on the fence
and not assert any knowledge about DST, and since mktimetz depends on
reliable timezone information, you do need to be careful about
supplying vague information in the first place:

>>> tz2am = time.mktimetz(time.strptime('2007-03-25 02:00:00', '%Y-%m-%d %H:%M:%S'))
>>> time.strftime('%Y-%m-%d %H:%M:%S %Z', time.localtime(tz2am))
'2007-03-25 05:00:00 CEST'

(I can only speculate as to what happens here, but it really isn't
worth too much consideration.)

Here, you really need mktime instead, because it will probably make
the right guesses about the presumed localtime given. However, if you
indicate the timezone, the result will be better:

>>> tz2am = time.mktimetz(time.strptime('2007-03-25 02:00:00 CET', '%Y-%m-%d %H:%M:%S %Z'))
>>> time.strftime('%Y-%m-%d %H:%M:%S %Z', time.localtime(tz2am))
'2007-03-25 03:00:00 CEST'
>>> time.strftime('%Y-%m-%d %H:%M:%S %Z', time.gmtime(tz2am))
'2007-03-25 01:00:00 GMT'

Here, an offset wouldn't be precise enough in the input (something
like +0100) because it wouldn't tell strptime about DST.

I could go on for a very long time about all this, and I've spent a
very long time messing around with the different time functions. My
personal opinion is that Python's time/datetime support needs a boost
if only in terms of useful additional library endorsements and better
documentation. Perhaps we just need to give the datetime module the
support it deserves and treat the time module as legacy code.

> In other news, setting time.tzname = ('GMT', 'GMT') does nothing.  You have
> to set the environment variable, then call tzset.  Is there a rational for
> this?  Seems odd.

It's the bizarre, even perverse way of the old UNIX time API. Various
enhancements have come along to diminish the need for such hacks, but
as you can imagine, they aren't fully standardised *and* universally
adopted.

Paul



From google at tyeon.com  Thu Aug 30 17:17:01 2007
From: google at tyeon.com (T)
Date: Thu, 30 Aug 2007 14:17:01 -0700
Subject: How to use os.putenv() ?
In-Reply-To: <13de3gc197b74dd@corp.supernews.com>
References: <1188436871.549201.315170@g4g2000hsf.googlegroups.com>
	<1188438641.676443.121510@x35g2000prf.googlegroups.com>
	<1188494964.539169.104180@d55g2000hsg.googlegroups.com>
	<13de3gc197b74dd@corp.supernews.com>
Message-ID: <1188508621.556566.19530@q3g2000prf.googlegroups.com>

Thank you everyone!



From papalagi.pakeha at gmail.com  Sun Aug 19 09:19:08 2007
From: papalagi.pakeha at gmail.com (Papalagi Pakeha)
Date: Mon, 20 Aug 2007 01:19:08 +1200
Subject: How to find script's directory
Message-ID: <343d1bca0708190619s1f07bb57tfdb32a70f68a031b@mail.gmail.com>

Hi,

I have a project (a django project actually) that has a structure
something like:
/path/prj/settings.py
/path/prj/scripts/blah.py
/path/prj/...

In order to run blah.py I need to set $PYTHONPATH to /path/prj because
it does "import settings". That's all good. I would however like to
autodetect the path in blah.py somehow and not need to set PYTHONPATH
prior to execution.

Whether it's called as /path/prj/scripts/blah.py or ./blah.py or
../../prj/scripts/blah.py or even plain blah.py should the whole path
to it be in $PATH I'd like it to detect it's location in the
filesystem and append its parent dir to sys.path

I guess I could do it with a little help of os.path.realpath() for all
those cases where absolute or relative path was used. But how should I
approach it when it's invoked as plain 'blah.py' because its directory
name is in $PATH?

TIA!

PaPa


From frank.wilder at gmail.com  Tue Aug 21 15:43:05 2007
From: frank.wilder at gmail.com (franko353)
Date: Tue, 21 Aug 2007 19:43:05 -0000
Subject: Microsoft Vista and os.exec
Message-ID: <1187725385.938752.290390@r34g2000hsd.googlegroups.com>

I have wxPython programs that work fine in Win2000/XP using os.exec().

They do not work in MS Vista. Has anyone else had any luck with
exec()?

I keep getting an 'invalid option' error.

It turn out it was really a security issue and I had to move to a
"win32process.CreateProcess" solution to fix this under Vista.

There is a good example of using CreateProcess in the "Python
programming on Win32" book.



From claird at lairds.us  Tue Aug 21 09:40:00 2007
From: claird at lairds.us (Cameron Laird)
Date: Tue, 21 Aug 2007 13:40:00 +0000
Subject: Server-side scripting in python
References: <1187614732.519547.296020@j4g2000prf.googlegroups.com>
Message-ID: <gi6rp4-mes.ln1@lairds.us>

In article <1187614732.519547.296020 at j4g2000prf.googlegroups.com>,
Nagarajan  <naga86 at gmail.com> wrote:
>Hi group,
>I need to develop a web application. I am in a fix as to choose among
>the various server-side scripting options. I want to explore python
>(am a newbie) to gain expertise and upon search, I learnt about
>PSP(Python Server Pages) that uses Jython as its scripting language.
>Is it a better option over PHP or Perl? Could anyone point out the
>pros and cons of using PSP over others?
			.
			.
			.
I suspect that several of us don't understand your question.

Python supports several--arguably, a plethora, more than any other
language--distinct "frameworks" for server-side scripting of Web
applications <URL: http://wiki.python.org/moin/WebFrameworks >.
PSP certainly is among these, although it's recommended <URL:
http://colorstudy.com/docs/shootout.html > less often than
several others.  Is PSP better than PHP or Perl?  First, do you
understand that PSP isn't directly comparable to PHP or Perl?  The
latter two are languages, while PSP is a Web framework.  In any 
case, the answer is certain to be, "it depends".  There certainly
are situations for each of PSP, PHP, Perl, and many other technol-
ogies.

I summarize:  if you have an interest in practicing Python while
building Web applications, your prospects certainly are bright; 
you'll receive abundant help from the folks here and elsewhere.
For us to provide more specific details about Perl, PSP, and so 
on, meaningful to your own needs, will only be possible when you
articulate the latter more fully <URL:
http://catb.org/~esr/faqs/smart-questions.html >.


From kasimmominov at gmail.com  Wed Aug 22 04:07:06 2007
From: kasimmominov at gmail.com (kasim)
Date: Wed, 22 Aug 2007 08:07:06 -0000
Subject: 4000 usd every month by the time you can reach or more
Message-ID: <1187770026.513143.324280@q3g2000prf.googlegroups.com>

AGLOCO: The Internet's First Economic Network

Today's hottest Internet businesses are all about the power of social
networks. Companies like MySpace, Facebook, and YouTube have become
worth billions because businesses have realized that these social
networks are generating huge advertising and marketing opportunities.
As these social networks grow, the economic potential for its owners -
and the advertisers who target the site's users - is remarkable.

At AGLOCO, we asked a simple question: The users created the
community, where's their share of the profit?

It was from this question that AGLOCO set out to create the Internet's
first Economic Network, harnessing the power of Internet-based social
networks to directly benefit the Members who help to create the
community.
http://www.agloco.com/r/BBFR2592


Becoming a member of AGLOCO is as simple as completing a brief sign-up
page (name, age, location and email address.). Once you're a Member,
you will be asked to then download the Viewbar  software. (Note: the
Viewbar  software is currently unavailable, as it is in closed
testing. It will be ready for public download in a few weeks, and
members will be notified when it is available.)

AGLOCO makes money for its Members in many ways:

http://www.agloco.com/r/BBFR2592

Search: Every time you use the Viewbar  to do an Internet search,
AGLOCO earns money from the search engine providers. (For example,
Google pays as much as $0.10 on average for each search that is
directed to its search engine.)
Advertising: The Viewbar  itself displays ads that are targeted based
upon the websites you're visiting. When you click on an ad and make a
purchase, AGLOCO receives a referral fee, which we pass on to our
Members. (Please note: Individual members do not receive any
compensation for clicking on ads in the Viewbar , and the Viewbar  can
detect if someone is clicking ads in a fraudulent manner.)
Transaction commissions: Many major retailers pay commissions when you
refer customers who make a purchase. AGLOCO collects that commission
and passes it on to our members. (For example, Amazon pays an 8.5%
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commission we can negotiate for our Members.)
Software distribution: Numerous software companies pay websites to
encourage the download of new software releases (for example, Adobe's
Flash and Acrobat Reader software), and trial versions of new
programs. AGLOCO members not only get access to the latest and coolest
software, they get paid for it.
Service distribution: Many online service providers will look to the
AGLOCO community as a source of new and active users for their
services. (For example, eBay, Skype, and PayPal, among others, all pay
fees to people who help them recruit new active users to their
services)
Product distribution: When Members agree to use a product, such as
cell phones, high-tech gadgets, office supplies, new credit cards or
financial services, AGLOCO can collect referral fees. Some companies
even offer special rebate and cash-back programs.
AGLOCO Members make money in four ways.
Members earn a monthly share of the AGLOCO revenue based on the use of
the AGLOCO Viewbar  that month.
Members earn part of the company based on the use of the AGLOCO
Viewbar  that month (currently a maximum of five hours are rewarded).
http://www.agloco.com/r/BBFR2592
.
Members who use our referral system to help build the AGLOCO network
will earn more. (AGLOCO only has significant value as a large network
and people who help build it should be rewarded. - We also feel that
the early users who told friends about YouTube or MySpace or even
Google probably deserved something too, but no referral system was
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Members will also get a share of any commissions AGLOCO gets when a
Member purchases a product or service from an AGLOCO Sponsor company.
Why should I join now?
First, it costs nothing to Join and takes less than one minute.  
Second, you can help build the AGLOCO community by recruiting new
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Remember, the bigger the AGLOCO community, the more attractive AGLOCO
is to potential business partners and advertisers.
Recruit your friends and family by contacting them through email. (But
remember we have a strict anti-spam policy.)
Use your blog and your existing social networks, such as MySpace and
Facebook, to contact your friends and encourage them to join a new
community that will actually let them earn money.


http://www.agloco.com/r/BBFR2592
Be a part of the Internet's first Member-Owned Economic Community.



From dickinsm at gmail.com  Tue Aug 28 12:58:02 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: Tue, 28 Aug 2007 16:58:02 -0000
Subject: int/long bug in locale?
In-Reply-To: <1188309809.592078.58960@22g2000hsm.googlegroups.com>
References: <1188309809.592078.58960@22g2000hsm.googlegroups.com>
Message-ID: <1188320282.070950.199270@d55g2000hsg.googlegroups.com>

On Aug 28, 10:03 am, tkp... at hotmail.com wrote:
> Is there an int/long related bug lurking in locale?

Looks like this has already been reported:

See http://bugs.python.org/issue1742669

Mark



From steve at holdenweb.com  Thu Aug 30 14:40:19 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 30 Aug 2007 14:40:19 -0400
Subject: list index()
In-Reply-To: <1188498073.997168.282420@q5g2000prf.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<46d674c2$0$417$426a34cc@news.free.fr>	<1188496588.750629.208100@g4g2000hsf.googlegroups.com>	<mailman.154.1188497511.28954.python-list@python.org>
	<1188498073.997168.282420@q5g2000prf.googlegroups.com>
Message-ID: <fb72um$ueb$1@sea.gmane.org>

zzbbaadd at aol.com wrote:
>> While I agree that Bruno's response was perhaps needlessly snippy, your
>> original question was needlessly inflammatory, as if you somehow wanted
>> some "religious zealot" to act the way Bruno did. If we start labeling
>> people, this thread will earn you a label that rhymes with "roll".
>>
> That is correct. I did word it in a way that would hook the Bruno's of
> the group. But I will probably have some more important questions so I
> will word it differently in the future. Such as: I wish they were not
> getting rid of dict.has_key() in Python 3, which I prefer to IN.
> 
> 
Well, again Python gives you the flexibility to define your own dict 
subclass that has a has_key() method with the obvious implementation.

But why would you want to ignore built-in support like "value in dict"?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From cai.haibin at gmail.com  Tue Aug 14 21:58:26 2007
From: cai.haibin at gmail.com (james_027)
Date: Wed, 15 Aug 2007 01:58:26 -0000
Subject: accessing keys in dict
Message-ID: <1187143106.021325.104690@l22g2000prc.googlegroups.com>

hi,

a_dict = {'name':'apple', 'color':'red', 'texture':'smooth',
'shape':'sphere'}

is there any difference between ..

for key in a_dict:

from

for key in a_dict.keys():


which is more preferred? any difference in performance?

THanks
james



From kylotan at gmail.com  Sat Aug 11 17:53:31 2007
From: kylotan at gmail.com (Ben Sizer)
Date: Sat, 11 Aug 2007 21:53:31 -0000
Subject: The Future of Python Threading
In-Reply-To: <mailman.1836.1186762424.22759.python-list@python.org>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<87ir7n4fps.fsf@benfinney.id.au>
	<1186760254.859080.137840@g12g2000prg.googlegroups.com>
	<mailman.1836.1186762424.22759.python-list@python.org>
Message-ID: <1186869211.206352.276530@b79g2000hse.googlegroups.com>

On Aug 10, 5:13 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/10/07, Ben Sizer <kylo... at gmail.com> wrote:
>
> > On 10 Aug, 15:38, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> > > Last I checked, multiple processes can run concurrently on multi-core
> > > systems. That's a well-established way of structuring a program.
>
> > It is, however, almost always more complex and slower-performing.
>
> > Plus, it's underdocumented. Most academic study of concurrent
> > programming, while referring to the separately executing units as
> > 'processes', almost always assume a shared memory space and the
> > associated primitives that go along with that.
>
> This is simply not true. Firstly, there's a well defined difference
> between  'process' and a 'thread' and that is that processes have
> private memory spaces. Nobody says "process" when they mean threads of
> execution within a shared memory space and if they do they're wrong.

I'm afraid that a lot of what students will be taught does exactly
this, because the typical study of concurrency is in relation to
contention for shared resources, whether that be memory, a file, a
peripheral, a queue, etc. One example I have close to hand is
'Principles of Concurrent and Distributed Programming', which has no
mention of the term 'thread'. It does have many examples of several
processes accessing shared objects, which is typically the focus of
most concurrent programming considerations.

The idea that processes have memory space completely isolated from
other processes is both relatively recent and not universal across all
platforms. It also requires you to start treating memory as
arbitrarily different from other resources which are typically
shared.

> And no, "most" academic study isn't limited to shared memory spaces.
> In fact, almost every improvement in concurrency has been moving
> *away* from simple shared memory - the closest thing to it is
> transactional memory, which is like shared memory but with
> transactional semantics instead of simple sharing.

I think I wasn't sufficiently clear; research may well be moving in
that direction, but you can bet that the typical student with their
computer science or software engineering degree will have been taught
far more about how to use synchronisation primitives within a program
than how to communicate between arbitrary processes.

> There's nothing "undocumented" about IPC. It's been around as a
> technique for decades. Message passing is as old as the hills.

I didn't say undocumented, I said underdocumented. The typical
programmer these days comes educated in at least how to use a mutex or
semaphore, and will probably look for that capability in any language
they use. They won't be thinking about creating an arbitrary message
passing system and separating their project out into separate
programs, even if that has been what UNIX programmers have chosen to
do since 1969. There are a multitude of different ways to fit IPC into
a system, but only a few approaches to threading, which also happen to
coincide quite closely to how low-level OS functionality handles
processes meaning you tend to get taught the latter. That's why it's
useful for Python to have good support for it.

> > Hardly. Sure, so you don't have to worry about contention over objects
> > in memory, but it's still completely asynchronous, and there will
> > still be a large degree of waiting for the other processes to respond,
> > and you have to develop the protocols to communicate. Apart from
> > convenient serialisation, Python doesn't exactly make IPC easy, unlike
> > Java's RMI for example.
>
> There's nothing that Python does to make IPC hard, either. There's
> nothing in the standard library yet, but you may be interested in Pyro
> (http://pyro.sf.net) or Parallel Python
> (http://www.parallelpython.com/). It's not erlang, but it's not hard
> either. At least, it's not any harder than using threads and locks.

Although Pyro is good in what it does, simple RPC alone doesn't solve
most of the problems that typical threading usage does. IPC is useful
for the idea of submitting jobs in the background but it doesn't fit
so well to situations where there are parallel loops both acting on a
shared resource. Say you have a main thread and a network reading
thread - given a shared queue for the data, you can safely do this by
adding just 5 lines of code: 2 locks, 2 unlocks, and a call to start
the networking thread. Implementing that using RPC will be more
complex, or less efficient, or probably both.

--
Ben Sizer



From ptmcg at austin.rr.com  Wed Aug  1 16:08:08 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 01 Aug 2007 13:08:08 -0700
Subject: Buffering HTML as HTMLParser reads it?
In-Reply-To: <1185993078.651180.298620@19g2000hsx.googlegroups.com>
References: <1185993078.651180.298620@19g2000hsx.googlegroups.com>
Message-ID: <1185998888.811319.15150@l70g2000hse.googlegroups.com>

On Aug 1, 1:31 pm, chris... at gmail.com wrote:
<snip>
>
> I'm thinking maybe somehow have HTMLParser append each character it
> reads except for data inside tags in some kind of buffer? This way I
> can have the HTML contents read into a buffer, then when I do my own
> handle_ overrides, I can also append to that buffer with the
> transformed data. Once the HTML page is finished parsing, ideally I
> would be able to print the contents of the buffer and the HTML would
> be identical except for the string transformations.
>
> I also need to make sure that all newlines, tags, spacing, etc are
> kept in tact -- this part is a requirement for other reasons.
>
> Thanks!

What you describe is almost exactly how pyparsing implements
transformString.  See below:

from pyparsing import *

boldStart,boldEnd = makeHTMLTags("B")

# convert <B> to <div class="bold"> and </B> to </div>
boldStart.setParseAction(replaceWith('<div class="emphatic">'))
boldEnd.setParseAction(replaceWith('</div>'))
converter = boldStart | boldEnd

html = "Display this in <b>bold</b>"
print converter.transformString(html)

Prints:

Display this in <div class="emphatic">bold</div>

All text not matched by a pattern in the converter is left as-is.  (My
CSS style/form may not be up to date, but I hope you get the idea.)

-- Paul



From gheize at gmail.com  Thu Aug 30 06:33:11 2007
From: gheize at gmail.com (Guillermo Heizenreder)
Date: Thu, 30 Aug 2007 07:33:11 -0300
Subject: problem with SQLObject + mysql
Message-ID: <1188469992.27740.14.camel@leinad-desktop>

Hi list I'm new whit SQLObjet. 
I'm study the tutorial:Connecting databases to Python with SQLObjet[1]

My problem is:
>>>from sqlobject.mysql import builder
>>>con=builder()(user='dbuser',passwd='dbpassword',host='localhost',db='garbanzo')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File
"/usr/lib/python2.5/site-packages/SQLObject-0.9.1-py2.5.egg/sqlobject/mysql/mysqlconnection.py", line 51, in __init__
    DBAPI.__init__(self, **kw)
  File
"/usr/lib/python2.5/site-packages/SQLObject-0.9.1-py2.5.egg/sqlobject/dbconnection.py", line 249, in __init__
    DBConnection.__init__(self, **kw)
TypeError: __init__() got an unexpected keyword argument 'passwd'


First i creating the user mysql:
 guille at leinad-desktop:~$ mysql -u root
 mysql> use mysql;
 Database changed
 mysql> create database garbanzo;
 Query OK, 1 row affected (0.02 sec)
 mysql> grant all privileges on garbanzo to 'dbuser'@'localhost'
identified by 'dbpassword';
 Query OK, 0 rows affected (0.10 sec)
 mysql> flush privileges;
 Query OK, 0 rows affected (0.09 sec)


So... how i do to connect?. how create de password correctly? 

Thanks and kind regards from Argentina.
P/D: my English it to bad, I'm a novice, :P.

[1]http://www-128.ibm.com/developerworks/library/os-pythonsqlo/index.html?ca=drs#resources
-- 
Heizenreder Guillermo
http://code.google.com/u/gheize/



From max at alcyone.com  Thu Aug  9 17:24:42 2007
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 09 Aug 2007 14:24:42 -0700
Subject: Puzzled by "is"
In-Reply-To: <mailman.1811.1186690896.22759.python-list@python.org>
References: <20070809194105.39BD11E400A@bag.python.org>	<f9frbl$dps$1@sea.gmane.org>
	<mailman.1811.1186690896.22759.python-list@python.org>
Message-ID: <frSdnWJVppuBGybbnZ2dnUVZ_iydnZ2d@speakeasy.net>

John K Masters wrote:

> OK fiddling around with this and reading the docs I tried:-
> a = 'qqqqqqqqqq' #10 q's
> b = 'qqqqqqqqqq' #10 q's
> a is b
> true
> c = 'q' * 10
> c
> 'qqqqqqqqqq' #10 q's
> d = 'q' * 10
> d
> 'qqqqqqqqqq' #10 q's
> c is d
> false
> 
> So from what I've read "==" tests for equivalence, "is" tests for identity but
> that does not explain the behaviour above.

Using the `is` test between non-sentinel immutable objects (e.g., 
integers, floats, strings) is _completely pointless_.  Since immutable 
objects cannot be changed, it is up to the interpreter (and thus can 
vary from version to version and implementation to implementation) 
whether or not to "cache" the objects and reuse them, or whether or not 
to create new ones.  You should never be testing such objects for 
identity (`is`); you should only be testing them for equality (`==`).

The only time it makes sense to use the `is` operator with immutable 
objects is when you're dealing with a sentinel object, e.g., `None`, or 
a custom sentinel object (e.g., `mySentinel = object()`), because that 
is the only time you actually _are_ interested in identity.  All other 
times you are not really interested in identity.

Sample code as above is essentially showing unimportant implementation 
details that should never concern you.  Don't use `is`, use `==`.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Chance favors the trained mind.
    -- Louis Pasteur


From gdamjan at gmail.com  Wed Aug 29 11:37:50 2007
From: gdamjan at gmail.com (Damjan)
Date: Wed, 29 Aug 2007 17:37:50 +0200
Subject: encoding problems
References: <46d5215b$0$411$426a74cc@news.free.fr>
	<fb3au1$v9m$1@lust.ihug.co.nz>
	<mailman.98.1188388302.28954.python-list@python.org>
Message-ID: <46d592bc$0$90274$14726298@news.sunsite.dk>

> 
> is there a way to sort this string properly (sorted()?)
> I mean first 'a' then '?' then 'e' etc. (sorted puts accented letters at
> the end). Or should I have to provide a comparison function to sorted?

After setting the locale...

locale.strcoll()


-- 
damjan


From deets at nospam.web.de  Thu Aug 16 11:54:14 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 16 Aug 2007 17:54:14 +0200
Subject: A problem with Time
In-Reply-To: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
References: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <5ija9dF3pjmsqU1@mid.uni-berlin.de>

special_dragonfly schrieb:
> Hello,
> 
> I need to return the date yesterday in the form DDMMYYYY. I looked through 
> the modules: time, datetime and calendar but can't find anything that leaps 
> out at me.
> 
> The problem I'm having is that although I can use time.localtime and get a 
> tuple of the year, month, day and so forth, I don't believe I can just minus 
> 1 from the day, because I don't think it's cyclic, also, I can't see the 
> date being linked in with the month.
> 
> So is there any way of getting yesterdays date?

RTFM is the answer...

import datetime
today = datetime.date.today()
yesterday = today - datetime.timedelta(days=1)
print yesterday


Diez


From rdm at rcblue.com  Thu Aug  9 13:38:46 2007
From: rdm at rcblue.com (Dick Moores)
Date: Thu, 09 Aug 2007 10:38:46 -0700
Subject: Puzzled by "is"
Message-ID: <20070809173855.9FDEB1E4009@bag.python.org>

 >>> () is ()
True
 >>> (1,) is (1,)
False

Why?

Thanks,

Dick Moores



From gandalf at designaproduct.biz  Sat Aug 18 03:56:30 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Sat, 18 Aug 2007 09:56:30 +0200
Subject: Encryption and hashing
In-Reply-To: <1187392383.237609.97250@19g2000hsx.googlegroups.com>
References: <1187377630.017794.36510@50g2000hsm.googlegroups.com>	<mailman.2122.1187379425.22759.python-list@python.org>
	<1187392383.237609.97250@19g2000hsx.googlegroups.com>
Message-ID: <46C6A62E.6080201@designaproduct.biz>


> These are the algorithms supported in the last version of PyCrypto:
>
> $ ls pycrypto-2.0.1/src/
> AES.c             Blowfish.c  DES.c            IDEA.c
> RIPEMD.c           winrand.c
> ARC2.c            cast5.c     _dsa.c           MD2.c
> _rsa.c             XOR.c
> ARC4.c            CAST.c      _fastmath.c      MD4.c   SHA256.c
> block_template.c  DES3.c      hash_template.c  RC5.c
> stream_template.c
>
> So it haven't Twofish, Serpent, neither Whirlpool. Neither many others.
>   
OK sorry, I was wrong. Isn't blowfish a better version of twofish anyway?



From jeffmess at gmail.com  Tue Aug 28 09:31:45 2007
From: jeffmess at gmail.com (jeffmess at gmail.com)
Date: Tue, 28 Aug 2007 13:31:45 -0000
Subject: Table update
In-Reply-To: <mailman.63.1188306274.28954.python-list@python.org>
References: <fb00tm$vu2$1@sea.gmane.org>
	<mailman.63.1188306274.28954.python-list@python.org>
Message-ID: <1188307905.354612.297400@r29g2000hsg.googlegroups.com>

On Aug 28, 2:57 pm, "Ahmed, Shakir" <shah... at sfwmd.gov> wrote:
> I am trying to use python script to update a table by incremental value
> based on struc_No but having problem to get right result on the value
> field for the 3rd and 4th same number of struc_no.
>
> I need to update the Value field only with the incremental value of 15
> or so
>
> Any help is highly appreciated.
>
> Thanks
> Shak
>
> Input table or source table
>
> ID      struc_id        Struc_No        Value
> 1       ABC             1001            10
> 2       EFJ             1005            15
> 3       HIK             1003            10
> 4       ILK             1005            10
> 5       PIO             1001            8
> 6       TIN             1001            12
> 7       MNO             1001            11
> 8       POW             1003            18
>
> Output Table
>
> ID      struc_id        Struc_No        Value           Added value
> 1       ABC             1001            25              15
> 2       EFJ             1005            30              15
> 3       HIK             1003            25              15
> 4       ILK             1005            40              30
> 5       PIO             1001            38              30
> 6       TIN             1001            57              45
> 7       MNO             1001            71              60
> 8       POW             1003            48              30


Well you certainly won't learn anything if you don't at least try to
solve the problem.
>>> file = open('Somefile', 'r').readlines()
>>> for line in file:
...     x = line.split()
...     if not x[3] == "Value":
...             print int(x[3]) + 15

I'm sure you can take it from here. Hope it helps.

Best regards

Jeffrey van Aswegen



From aafshar at gmail.com  Thu Aug 30 05:51:41 2007
From: aafshar at gmail.com (Ali)
Date: Thu, 30 Aug 2007 09:51:41 -0000
Subject: IDE for Python
In-Reply-To: <mailman.55.1187690455.32294.python-list@python.org>
References: <mailman.55.1187690455.32294.python-list@python.org>
Message-ID: <1188467501.364273.178320@o80g2000hse.googlegroups.com>

On Aug 21, 11:00 am, Joel Andres Granados <joel.grana... at gmail.com>
wrote:
> Hello list:
>
> I have tried various times to use an IDE for python put have always been
> disapointed.
> I haven't revisited the idea in about a year and was wondering what the
> python people
> use.
> I have also found http://pida.co.uk/main as a possible solution.  Anyone
> tried it yet?

PIDA (http://pida.co.uk/), in my humble opinion, is the One True IDE*.

It will embed the editor of your choice, use the version control
system of your choice, and integrate the tools of your choice. In
short, it integrates your development tools into a single environment.
Hence the tag: "One True IDE".

Ali

* Emacs is pretty good at this, but since PIDA can embed Emacs anyway,
and adds features to it...



From python at jayloden.com  Wed Aug  8 01:09:29 2007
From: python at jayloden.com (Jay Loden)
Date: Wed, 08 Aug 2007 01:09:29 -0400
Subject: How can I programmatically find the name of a method from within
	that	method?
In-Reply-To: <1186548312.672360.259100@q3g2000prf.googlegroups.com>
References: <1186548312.672360.259100@q3g2000prf.googlegroups.com>
Message-ID: <46B95009.6040803@jayloden.com>

kj7ny wrote:
> Is there a way that I can programmatically find the name of a method I
> have created from within that method?  I would like to be able to log
> a message from within that method (def) and I would like to include
> the name of the method from which it was written without having to
> hard-code that value in every message string.  While we're at it, is
> there a way to programmatically get the name of the class and the
> module while I'm at it?

This is a frequently asked question around here :-)

You should search the list archives for past threads, e.g:
http://aspn.activestate.com/ASPN/Mail/Message/python-list/3542665

-Jay


From ldo at geek-central.gen.new_zealand  Sun Aug 12 23:37:28 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 13 Aug 2007 15:37:28 +1200
Subject: Error calling module
References: <pan.2007.08.10.23.23.11.116698@fartknuckle.com>
Message-ID: <f9ojh8$bpi$2@lust.ihug.co.nz>

In message <pan.2007.08.10.23.23.11.116698 at fartknuckle.com>, fartknuckle
wrote:

> When I try to call gtk like so:
> 
> 
> import gtk
> 
> I get the error:
> 
> ImportError: No module named gtk
> 
> 
> I installed a new Python and a new pygtk.
> Is the gtk module not a part of pygtk???
> 
> I have PYTHONPATH=/usr/local/lib/python2.5/site-packages
> set. So what am I doing wrong?

First question: where is the gtk module located?

Second question: start up python interactively, type

    import sys
    sys.path

Does the resulting list include the directory that is the answer to the
first question?


From jgarviahonrado at yahoo.es  Tue Aug 28 09:38:55 2007
From: jgarviahonrado at yahoo.es (=?iso-8859-1?Q?Julio_Garv=EDa?=)
Date: Tue, 28 Aug 2007 13:38:55 +0000 (GMT)
Subject: HP-UX IA: Python 2.4 (64bits & gcc)
Message-ID: <197077.37988.qm@web86906.mail.ukl.yahoo.com>

Hello,

Please, Could you kindly tell me how to build Python 2.4 in HP-UX 11i v2 (Itanium) in 64 bits using gcc/g++?

Thanks in advance for your attention.
With best regards, 
Julio Garv?a Honrado




       
____________________________________________________________________________________
S? un Mejor Amante del Cine                         
?Quieres saber c?mo? ?Deja que otras personas te ayuden!
http://advision.webevents.yahoo.com/reto/entretenimiento.html
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From stefan.behnel-n05pAM at web.de  Wed Aug  1 08:26:51 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 01 Aug 2007 14:26:51 +0200
Subject: Plain old SAX and minidom useable? But how then?
In-Reply-To: <1185969539.653078.287360@w3g2000hsg.googlegroups.com>
References: <1185969539.653078.287360@w3g2000hsg.googlegroups.com>
Message-ID: <46B07C0B.70507@web.de>

Hi,

calm down, minidom is not easy to use, but it can solve your problem.

Dobedani wrote:
> I guess I don't know where to look for the right information. I hope
> you guys can help me on the way. I want to retrieve a string from an
> XML-file. If Python were to have XPath available, my problem would be
> solved. The xquery string would be enough and I have already obtained
> that the string. The problem is that I cannot use any add-on - like
> xmllib, sax2 or elementtree - as my customers only have the so-called
> stock Python install - i.e. version 2.4.1.

Too bad, that rules out lxml.etree (which has XPath and loads of other goodies).


> Please: where then can I find examples of such use? If I cannot use
> xpath, I would not mind to browse a bit - e.g. using functions like
> getElementByTag() but I don't even know how to use those. TIA

Try one of these (I looked for "minidom example"):

http://www.faqs.org/docs/diveintopython/kgp_parse.html
http://docs.python.org/lib/dom-example.html
http://www.cutthecrap.biz/software/whitepapers/minidom.html

Maybe that helps?

Stefan


From trebla at vex.net  Mon Aug 20 18:22:19 2007
From: trebla at vex.net (Albert Y. C. Lai)
Date: Mon, 20 Aug 2007 18:22:19 -0400
Subject: Xah's Edu Corner: Under the spell of Leibniz's dream
In-Reply-To: <1187578927.945921.280180@q4g2000prc.googlegroups.com>
References: <1187567809.896668.228650@z24g2000prh.googlegroups.com>
	<1187578927.945921.280180@q4g2000prc.googlegroups.com>
Message-ID: <fad46v02kb8@news3.newsguy.com>

Twisted wrote:
> A link to a copy in a non-toxic format would be nice.

http://www.cs.utexas.edu/users/EWD/transcriptions/EWD12xx/EWD1298.html


From kyosohma at gmail.com  Mon Aug 20 08:57:48 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 20 Aug 2007 05:57:48 -0700
Subject: datetime in microseconds
In-Reply-To: <1187610776.755796.170990@r29g2000hsg.googlegroups.com>
References: <1187610776.755796.170990@r29g2000hsg.googlegroups.com>
Message-ID: <1187614668.711802.145740@q3g2000prf.googlegroups.com>

On Aug 20, 6:52 am, mroelo... at gmail.com wrote:
> Hi I have a time in microseconds, for example 0x8C905CBA7F84AF4. I
> want this to a normal view in hh:mm:ss DD:MM:YYYY. I tried with
> datetime, but it only takes a max of 1000000 microseconds is there
> another solution?

Just truncate the value so that it's less than 1000000. A slight
difference of a couple seconds shouldn't matter for the output format
you're talking about.

Mike



From korovev76 at gmail.com  Wed Aug  8 11:15:41 2007
From: korovev76 at gmail.com (korovev76 at gmail.com)
Date: Wed, 08 Aug 2007 08:15:41 -0700
Subject: parsing a dbIII file
In-Reply-To: <mailman.1717.1186501671.22759.python-list@python.org>
References: <1186469710.277542.246430@w3g2000hsg.googlegroups.com>
	<mailman.1717.1186501671.22759.python-list@python.org>
Message-ID: <1186586141.625100.166810@57g2000hsv.googlegroups.com>

On 7 Ago, 17:47, "Jerry Hill" <malaclyp... at gmail.com> wrote:
> On 8/7/07, korove... at gmail.com <korove... at gmail.com> wrote:
>
> > I have to parse a file (that is a dbIII file) whose stucture look like
> > this:
> > |string|, |string|, |string that may contain commas inside|, 1, 2, 3, |
> > other string|
>
> The CSV module is probably the easiest way to go:
>
> >>> data = "|string|, |string|, |string that may contain commas
>
> inside|, 1, 2, 3, |other string|">>> import csv
> >>> reader = csv.reader([data], quotechar="|", skipinitialspace=True)
> >>> for row in reader:
>
>         print row
>
> ['string', 'string', 'string that may contain commas inside', '1',
> '2', '3', 'other string']
>
> --
> Jerry


you all were right, I had to mention that I must put the datas in
mysql... So actually the best way to do it is with csv.reader: i tried
it and it works out!

thanx very much!



From paul at boddie.org.uk  Fri Aug 10 07:26:24 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Fri, 10 Aug 2007 04:26:24 -0700
Subject: The Future of Python Threading
In-Reply-To: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
Message-ID: <1186745184.074168.302560@x40g2000prg.googlegroups.com>

On 10 Aug, 12:01, "Justin T." <jmtull... at gmail.com> wrote:
>
> While I don't pretend to be an authority on the subject, a few days of
> research has lead me to believe that a discussion needs to be started
> (or continued) on the state and direction of multi-threading python.
>
> Python is not multi-threading friendly.

Yes it is: Jython and IronPython support free threading; CPython,
however, does not. Meanwhile, take a look at this page for different
flavours of alternative solutions:

http://wiki.python.org/moin/ParallelProcessing

Paul



From aleax at mac.com  Mon Aug 27 11:07:50 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 27 Aug 2007 08:07:50 -0700
Subject: How to replace a method in an instance.
References: <mailman.258.1187971369.32294.python-list@python.org>
	<1187971953.261328.219000@q3g2000prf.googlegroups.com>
	<46cf2ba2$0$30562$426a74cc@news.free.fr>
	<1187984450.138147.62780@e9g2000prf.googlegroups.com>
	<46d282a9$0$415$426a74cc@news.free.fr>
Message-ID: <1i3hv67.14vw1pfalghkcN%aleax@mac.com>

Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com>
wrote:

> >>> Of course, a function in a
> >>> class is also know as a method.
> >> Less obvious but still wrong !-)
> > 
> > I wish the authors of the Python books would get a clue then.
> 
> I'd think that at least some authors of some Python books would explain
> all this much better than I did. But FWIW, all these rules are clearly
> documented in the Fine Manual.

Speaking as one such author, I think I do a reasonable job of this in
"Python in a Nutshell" (2nd ed): on p. 82 and 85 I have brief mentions
that "class attributes bound to functions are also known as methods of
the class" (p.82) and again that "functions (called methods in this
context) are important attributes for most class objects" (p.85); on
p.91-94, after explaining descriptors, instances, and the basics of
attribute reference, I can finally cover the subject thoroughly in
"Bound and Unbound Methods".  I realize that a beginner might be
confused into believing that "class attributes bound to functions" means
"function in a class", if they stop reading before p.91;-), but I don't
literally make that wrong assertion...;-)


Alex


From http  Wed Aug 22 01:46:02 2007
From: http (Paul Rubin)
Date: 21 Aug 2007 22:46:02 -0700
Subject: for statement on empty iterable
References: <1187760507.951994.50310@q4g2000prc.googlegroups.com>
	<7xabsk3zgm.fsf@ruckus.brouhaha.com>
	<1187761270.713307.224570@i38g2000prf.googlegroups.com>
Message-ID: <7xejhw15r9.fsf@ruckus.brouhaha.com>

james_027 <cai.haibin at gmail.com> writes:
> Thanks for your quick answer ... Actually I was thinking how do I
> access the index inside a for statement? Can you help

It sounds like you're just starting to learn the language... have you
read the online tutorial yet?  That is a pretty easy introduction.

See: http://python.org/doc/

Anyway, you can say

   for i in (1,2,3):
      print i*5

to print 5, 10, and 15 on separate lines, for example.


From gnewsg3 at gmail.com  Thu Aug  9 14:21:47 2007
From: gnewsg3 at gmail.com (billiejoex)
Date: Thu, 09 Aug 2007 11:21:47 -0700
Subject: tempfile behavior
Message-ID: <1186683707.869668.316360@g4g2000hsf.googlegroups.com>

Hi all,
I would like to use tempfile module to generate files having unique
names excepting that I don't want them to be removed after closing.
Does it is possible?



From kay.schluehr at gmx.net  Sun Aug 12 03:26:09 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sun, 12 Aug 2007 00:26:09 -0700
Subject: is there anybody using __del__ correctly??
In-Reply-To: <1186731369.073644.158490@z24g2000prh.googlegroups.com>
References: <1186731369.073644.158490@z24g2000prh.googlegroups.com>
Message-ID: <1186903569.106760.203300@o61g2000hsh.googlegroups.com>

On Aug 10, 9:36 am, Michele Simionato <michele.simion... at gmail.com>
wrote:

> P.S. BTW, I should mention that if you search comp.lang.python for
> __del__
> you will find hundreds of people who were bitten by __del__, so I
> usually give
> advices such as "you should never __del__ in your code". If I am wrong
> in
> giving this advice, please let me know!

I wish we had constructive proofs of cycle freedom and appropriate
warnings - much more then __del__ freedom [1].

Well, we discussed a retro computing example yesterday where some guy
needed to close a generator and release resources, still working with
Python 2.4.

http://groups.google.com/group/comp.lang.python/browse_frm/thread/3f789096bded17e7/?hl=en#

We did it both wrong initially and constructed a reference cycle. Now
I keep my fingers crossed that my most recent solution using __del__
works, because I like it :)

[1] While I'm using Python on and off I feel subconsciously attracted
by the latest Haskell mania and start to dream alike. Maybe I should
visit a shrink or a shaman?



From brett at python.org  Mon Aug 20 16:37:58 2007
From: brett at python.org (Brett Cannon)
Date: Mon, 20 Aug 2007 13:37:58 -0700
Subject: Moving Python's tracker to Roundup on Aug 23rd
Message-ID: <bbaeab100708201337y603c90ecj518eaebbf26ce5a1@mail.gmail.com>

On August 23rd Python will be moving off of SourceForge and over to
our own issue tracker run on Roundup (http://bugs.python.org/).

During the transition there will be a time where the SourceForge
tracker is no longer being used but that the new tracker has not been
brought up yet.  We expect this gap to be for a few hours.  But to
minimize issues, please try to avoid using either SourceForge or the
new issue tracker on Aug 23rd if you can.


-Brett Cannon
Chairman, PSF Infrastructure committee


From db3l.net at gmail.com  Thu Aug 30 17:27:29 2007
From: db3l.net at gmail.com (David Bolen)
Date: Thu, 30 Aug 2007 17:27:29 -0400
Subject: Unzip: Memory Error
References: <1188413939.834662.193180@y42g2000hsy.googlegroups.com>
	<m21wdmgkmh.fsf@valheru.db3l.homeip.net>
	<1188472431.290871.103720@o80g2000hse.googlegroups.com>
	<m2642wg6ze.fsf@valheru.db3l.homeip.net>
	<m2fy20enoj.fsf@valheru.db3l.homeip.net>
Message-ID: <m2bqcoemri.fsf@valheru.db3l.homeip.net>

I wrote:

> Here's a small example of a ZipFile subclass (tested a bit this time)
> that implements two generator methods:

Argh, not quite tested enough - one fix needed, change:

            if bytes[-1] not in ('\n', '\r'):
                partial = lines.pop()

to:

            if bytes[-1] not in ('\n', '\r'):
                partial = lines.pop()
            else:
                partial = ''

(add the extra two lines)

-- David


From omelnyk at gmail.com  Mon Aug 20 05:37:31 2007
From: omelnyk at gmail.com (Olexandr Melnyk)
Date: Mon, 20 Aug 2007 12:37:31 +0300
Subject: Where we need to use Python ?
In-Reply-To: <1187596936.136499.200280@l22g2000prc.googlegroups.com>
References: <1187596936.136499.200280@l22g2000prc.googlegroups.com>
Message-ID: <d5f60f0c0708200237qbfd901ej2361ed75c548aaa2@mail.gmail.com>

2007/8/20, gperumal at gmail.com <gperumal at gmail.com>:
>
> Hi
>
> Iam new to Python
> I know Perl, JScript,C,C++,Java
> But i want to know where excatly this python come in to picture
>
> And Is it a interpreted language or a programming language
> It comes in which category
>
> I very keen to know this please tell


Python is an interpreted programming languages, although there are
compiled implementations.

You can use it for a variety of tasks, except low-level programming.

Regards
> Ganesh P
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Sincerely yours,
Olexandr Melnyk
http://omelnyk.net/
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From arkanes at gmail.com  Mon Aug  6 16:43:52 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 6 Aug 2007 15:43:52 -0500
Subject: Tkinter or wxpython?
In-Reply-To: <7x8x8oqy17.fsf@ruckus.brouhaha.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
	<mailman.1680.1186416061.22759.python-list@python.org>
	<7x3aywr4tc.fsf@ruckus.brouhaha.com>
	<mailman.1684.1186422197.22759.python-list@python.org>
	<7x8x8oqy17.fsf@ruckus.brouhaha.com>
Message-ID: <4866bea60708061343s3cc53df7i7b4d910e80db38a0@mail.gmail.com>

On 06 Aug 2007 12:10:44 -0700, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> "Chris Mellon" <arkanes at gmail.com> writes:

<snip over-long thread>

I had a bunch of replies to each section but I think this is getting
too long so I'll sum up.

You repeatedly have used the word "slickness" as a pejorative. I find
that offensive and it's insulting to users. When I write applications,
I want the interface to be as smooth and trouble free as possible,
with a simple a learning curve and the fewest possible bumps for them.
This isn't a matter of adding chrome or shine or rounded corners and
specular highlights. It's about letting them enjoy working with an
application instead of tolerating it. It's the same reason I use
Python and not C. It's about respect for their time and their
preferences.

As a matter of time spent in development, I do not find that
non-trivial UIs are significantly easier to develop using web
interfaces.

As a matter of respect for the user, I'm not going to tell them to use
a trivial UI if a non-trivial one will save them time, learning
effort, or frustration. In order to make this decision, I like to work
with the people actually using it and watch them at work. To see what
kind of extra steps they have to take and where I can save them time
or inaccuracy or frustration.


From horpner at yahoo.com  Thu Aug 30 13:59:57 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 30 Aug 2007 17:59:57 GMT
Subject: Python doesn't see the directories I create
References: <ldvBi.293202$LE1.92748@newsfe13.lga>
	<46d6856b$0$17674$426a74cc@news.free.fr>
	<slrnfddha0.1o4.horpner@FIAD06.norwich.edu>
	<mailman.146.1188494196.28954.python-list@python.org>
Message-ID: <slrnfde1km.1n0.horpner@FIAD06.norwich.edu>

On 2007-08-30, Steve Holden <steve at holdenweb.com> wrote:
> Neil Cerutti wrote:
>> To me, Python's collection of special-purpose string literal
>> notations is one of its little warts.
>
> Well, it's a wart that's shared with many other languages -
> including, interestingly enough, Microsoft's very own C#, from
> whose documentation the following examples are taken:
>
> string a = "hello, world";                  // hello, world
> string b = @"hello, world";                 // hello, world
> string c = "hello \t world";                // hello     world
> string d = @"hello \t world";               // hello \t world
> string e = "Joe said \"Hello\" to me";      // Joe said "Hello" to me
> string f = @"Joe said ""Hello"" to me";     // Joe said "Hello" to me
> string g = "\\\\server\\share\\file.txt";   // \\server\share\file.txt
> string h = @"\\server\share\file.txt";      // \\server\share\file.txt
> string i = "one\r\ntwo\r\nthree";

Still, that's only two.

> The fact is that some strings are always going to cause
> trouble. Unfortunately programming itself is a task that
> requires a little more knowledge to be applied to the task.

Or fortunately, depending on the dictates of your temperament. ;)

-- 
Neil Cerutti


From franz.steinhaeusler at gmx.at  Sun Aug  5 16:52:22 2007
From: franz.steinhaeusler at gmx.at (Franz Steinhäusler)
Date: Sun, 05 Aug 2007 22:52:22 +0200
Subject: Best programs written completly in Python
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
	<1186338373.738163.257890@o61g2000hsh.googlegroups.com>
Message-ID: <g0ecb317b55qsudalvs7235v6872mscira@4ax.com>

On Sun, 05 Aug 2007 11:26:13 -0700, markacy <markacy at gmail.com> wrote:

>On 5 Sie, 12:14, Franz Steinh?usler <franz.steinhaeus... at gmx.at>
>wrote:
>> Hello NG,
>>
>> wWhat are the best programs in your opinion, written entirly
>> in pyhton, divided into categories like:
>> a) Games
>> b) Utilities/System
>> c) Office
>> d) Web/Newsreader/Mail/Browser
>> ...
>>
>> I don't want to start a long thread, if a site of such
>> an discussion already exists, a link will be enough.
>>
>> Many thanks in advance!
>>
>> --
>> Franz Steinhaeusler
>
>I guess, that gentoo's portage is (almost?) entirely written in
>python. The same is with Zope/Plone (Web category), though I know,
>that Zope has some parts of code written in C. Django?
>
>Big part's of google "tools" are written in python as well. Matplotlib
>is said to be written entirely in python.
>These are examples from the top of my head. If I'll came up with
>something else, I will let You know :-)
>
>Cheers,
>Marek

Ah yes of course,

One or I, often see only programs, which is "closed in itself",
like an editor, viewer, newsreader, and oversee, that big parts
of "invisible" software is written in python.

Thank you for mentioning that pieces of software!

-- 
Franz Steinhaeusler


From horpner at yahoo.com  Thu Aug  9 16:28:57 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 09 Aug 2007 20:28:57 GMT
Subject: Puzzled by "is"
References: <20070809194105.39BD11E400A@bag.python.org>
	<f9frbl$dps$1@sea.gmane.org>
	<mailman.1811.1186690896.22759.python-list@python.org>
Message-ID: <slrnfbmufu.1rk.horpner@FIAD06.norwich.edu>

On 2007-08-09, John K Masters <johnmasters at oxtedonline.net> wrote:
> On 15:53 Thu 09 Aug     , Steve Holden wrote:
>> Dick Moores wrote:
>> > At 10:46 AM 8/9/2007, Bill Scherer wrote:
>> >> Dick Moores wrote:
>> [...]
>> >> There is only one empty tuple.
>> >> Does that clear it up for you?
>> > 
>> > But isn't that the same as saying, "That's just the reality of 
>> > Python; it is what it is."? I want to know why there is only one 
>> > empty tuple, but more than one (1,).
>> > 
>> Why? Because.
>> 
>> Seriously, it's just an optimization by the implementers. There is no 
>> need for more than one empty tuple, since tuples can never be modified 
>> once created.
>> 
>> But they decided not to create (1, ) in advance. They probably knew that 
>> hardly anybody would want to create that tuple ;-) [Seriously: if you 
>> started trying to predict which tuples would be used you would go 
>> insane, but the empty tuple is the most likely candidate].
>> 
>> > Also,
>> >  >>> [] is []
>> > False
>> > 
>> In that case it would definitely NOT make sense to have them the same 
>> list. Python always ensures that the [] constructor creates a new list, 
>> since that list may be bound to one or more variables and mutated. You 
>> wouldn't want
>> 
>>    a = []
>>    b = []
>>    a.append("boo!")
>> 
>> to change b so it was no longer an empty list. If you wanted a and b to 
>> reference the same list you would change the second statement to
>> 
>>    b = a
>> 
>> regards
>>   Steve
>
> OK fiddling around with this and reading the docs I tried:-
> a = 'qqqqqqqqqq' #10 q's
> b = 'qqqqqqqqqq' #10 q's

CPython is full of cute little optimizations, and one of them is
that literal strings less than a certain length are 'interned'.
This makes them very fast to compare for equality, and cheaper to
store (maybe?).

> a is b
> true
> c = 'q' * 10
> c
> 'qqqqqqqqqq' #10 q's
> d = 'q' * 10
> d
> 'qqqqqqqqqq' #10 q's
> c is d
> false
>
> So from what I've read "==" tests for equivalence, "is" tests
> for identity but that does not explain the behaviour above.

The 10 q's constructed with string arithmetic were not interned,
because they were not literals.

-- 
Neil Cerutti


From bdesth.quelquechose at free.quelquepart.fr  Wed Aug 22 01:52:39 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 22 Aug 2007 07:52:39 +0200
Subject: Regular expression use
In-Reply-To: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
Message-ID: <46cf2ca6$0$30562$426a74cc@news.free.fr>

Nick Maclaren a ?crit :
> For reasons that I won't explain, as they are too complicated
> and not terribly relevant, I am interested in discovering what
> people actually use regular expressions for. 

Usually, to obfuscate code. Sometimes for good reasons....

Hu ? Ok, me get out ---->[]


From horpner at yahoo.com  Fri Aug  3 10:32:32 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 03 Aug 2007 14:32:32 GMT
Subject: (no) fast boolean evaluation ?
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<cfb58d850708021619s298f69b9p3af86905d1695939@mail.gmail.com>
	<mailman.1551.1186099243.22759.python-list@python.org>
	<46b2e56b$0$18879$426a74cc@news.free.fr>
	<pan.2007.08.03.14.24.23.227662@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrnfb6fap.1b4.horpner@FIAD06.norwich.edu>

On 2007-08-03, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> But that's specific to the syntax of the language. You could,
> if you choose, design a language where elif was unnecessary:
>
> if condition:
>     pass
> else if another_condition:
>     pass
>
> What advantage is there to "elif", apart from it needing three
> fewer characters to type?

It's a great boon to the authors of auto-indenting text editors.

-- 
Neil Cerutti


From coyote_x at artcom.pl  Thu Aug  2 02:27:05 2007
From: coyote_x at artcom.pl (Adam Kubica)
Date: Thu, 02 Aug 2007 08:27:05 +0200
Subject: Equivalent to gzinflate() function in PHP.
References: <pan.2007.08.01.13.44.47.273887@artcom.pl>
	<1185976461.491418.20230@i38g2000prf.googlegroups.com>
	<pan.2007.08.02.06.17.09.653367@artcom.pl>
Message-ID: <pan.2007.08.02.06.27.03.891918@artcom.pl>

On Thu, 02 Aug 2007 08:17:13 +0200, Adam Kubica wrote:

> On Wed, 01 Aug 2007 13:54:21 +0000, kyosohma wrote:
> 
>> On Aug 1, 8:44 am, Adam Kubica <coyot... at artcom.pl> wrote:
>>> Hellou.
>>>
>>> Anybody know about code that work equivalent to gzinflate()
>>> function used in PHP?
>>>
>>> I search via google but I don't found anything sensible :-(
>> 
>> I'm not sure what gzinflate does, but it looks like it's some kind of
>> compression/decompression method. Python can do that. Check out the
>> following links:
>> 
>> http://www.python.org/doc/lib/module-gzip.html
>> http://www.python.org/doc/lib/module-zlib.html
>> http://python.active-venture.com/lib/module-bz2.html
>> 
>> Hopefully this is the type of thing you were looking for.
>> 
> 
> OK, but it isn't that I looking for :-(
> 
> gzinflate() is reversed function of gzdeflate(), zlib module allows to use
> compress methon only, it's equivalent to gzcompress() in PHP.

After some king of brain fucked tries, I found:

zlib.decompress( data ) #equivalent gzdecompress()
zlib.decompress( data, -zlib.MAX_WBITS ) #equivalent gzdeflate()

Thanks :-)



From theshadowx at gmail.com  Thu Aug 23 15:28:35 2007
From: theshadowx at gmail.com (TheShadow)
Date: Thu, 23 Aug 2007 19:28:35 -0000
Subject: Question about embedding python in C++
In-Reply-To: <1187896641.618261.51350@e9g2000prf.googlegroups.com>
References: <1187891085.147246.19380@i38g2000prf.googlegroups.com>
	<vUjzi.51$L_7.47@newsfe16.phx>
	<1187896641.618261.51350@e9g2000prf.googlegroups.com>
Message-ID: <1187897315.582592.10400@x35g2000prf.googlegroups.com>

On Aug 23, 1:17 pm, TheShadow <theshad... at gmail.com> wrote:
> On Aug 23, 11:57 am, Farshid Lashkari <n... at spam.com> wrote:
>
> > TheShadow wrote:
> > > When extending python in c/c++ after you register a module is there a
> > > way in c/c++ to check if they were correctly registered?
>
> > > Cause I'm having the problem where when I execute the the python
> > > script it finds the module but none of the functions.
>
> > Are you calling Py_InitModule(...) in your initmodule function? If so,
> > Py_InitModule(...) returns a reference to the module object. You can use
> > this object to double check that your function names exist in the
> > modules dictionary. Most likely, there is an error in your code. If you
> > post it, it would be easier to tell what the problem is.
>
> > -Farshid
>
> Alright that was a dead end. Here is the source code.
>
> bool CPythonModule::Register()
> {
>         bool bReturn = false;
>         unsigned int uiSize = static_cast<unsigned
> int>(m_LPyMethodDefs.size());
>         if (m_LPyMethodDefs.size() > 0)
>         {
>                 m_pEmbMethods = new PyMethodDef[m_LPyMethodDefs.size()+1];
>                 unsigned int uiCounter = 0;
>
>                 IterQPyMethodDefs iterMethods = m_LPyMethodDefs.begin();
>
>                 while (m_LPyMethodDefs.end() != iterMethods)
>                 {
>                         m_pEmbMethods[uiCounter].ml_name =
> m_LPyMethodDefs.front().sName.c_str();
>                         m_pEmbMethods[uiCounter].ml_meth =
> m_LPyMethodDefs.front().pFunction;
>                         m_pEmbMethods[uiCounter].ml_flags = m_LPyMethodDefs.front().iFlags;
>                         m_pEmbMethods[uiCounter].ml_doc =
> m_LPyMethodDefs.front().sDoc.c_str();
>
>                         ++uiCounter;
>                         ++iterMethods;
>                 }
>
>                 PyMethodDef PyMethodNullDef = {NULL, NULL, 0, NULL};
>
>                 m_pEmbMethods[uiSize] = PyMethodNullDef;
>
>                 Py_InitModule(m_sModuleName.c_str(),m_pEmbMethods);
>
>                 //PythonInterfaceInst->RegisterModule(this);
>
>                 m_pInitFunc();
>
>                 bReturn = true;
>         }
>         return bReturn;
>
> }

Forget I said anything I found my bug... I was using m_LPyMethodDefs
instead of my iterator... hurray for writing code at 12am :P



From bbxx789_05ss at yahoo.com  Fri Aug 10 05:40:13 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Fri, 10 Aug 2007 02:40:13 -0700
Subject: wxPython - drawing without paint event
In-Reply-To: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
Message-ID: <1186738813.373909.96230@x35g2000prf.googlegroups.com>

On Aug 9, 7:46 pm, Matt Bitten <mbitte... at yahoo.com> wrote:
> I've got a wxPython program that needs to do some drawing on a DC on a
> regular basis.... And there is no event,
> so my code doesn't get called. What do I do?

Then the event is: "on a regular basis", i.e. the passage of time.
You can use a wx.Timer to create events at regular intervals, which
your code can respond to:

-------
import wx

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, "My Window")

        panel = wx.Panel(self, -1)
        self.text = wx.StaticText(panel, -1, "hello", pos=(40, 40) )

        self.timer = wx.Timer(self)
        self.Bind(wx.EVT_TIMER, self.on_timer_event)
        self.timer.Start(milliseconds=1000, oneShot=False)

    def on_timer_event(self, event):
        if self.text.GetLabel() == "hello":
            self.text.SetLabel("goodbye")
        else:
            self.text.SetLabel("hello")


app = wx.App(redirect=False)

win = MyFrame()
win.Show()

app.MainLoop()
----------------

Make sure you save the timer in self so that you have a permanent
reference to the object, otherwise the timer will be destroyed when
__init_ returns.






From gagsl-py2 at yahoo.com.ar  Wed Aug 22 10:01:49 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 22 Aug 2007 07:01:49 -0700
Subject: redirect or cover .bat log
In-Reply-To: <1187787876.962883.66970@r34g2000hsd.googlegroups.com>
References: <1187764689.836375.212730@z24g2000prh.googlegroups.com>
	<5j26bvF3s7lbpU2@mid.uni-berlin.de>
	<1187767578.925671.107000@q4g2000prc.googlegroups.com>
	<5j2br6F3r2avsU1@mid.uni-berlin.de>
	<1187787876.962883.66970@r34g2000hsd.googlegroups.com>
Message-ID: <1187791309.427046.22400@q3g2000prf.googlegroups.com>

On 22 ago, 10:04, vedrandeko... at v-programs.com wrote:
>
> > >> > e.g I need run my my_scripts_setup.bat that contain:
>
> > >> > python myscript_setup.py py2exe
>
> > >> > Can I cover or redirect log of that process into my wx program?
> > >> > I'am using Windows XP SP2, and Python 2.5.

Try the subprocess module. For the single line command you posted
earlier, you don't even need the bat file:

import subprocess
p = subprocess.Popen(["python", "myscript_setup.py", "py2exe"],
stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
p.wait()
output_from_process = p.stdout.readlines()

This would be fine if executing the script takes relatively a short
time and doesn't generate so many output lines; there are other
examples in the subprocess module documentation <http://
docs.python.org/lib/module-subprocess.html>

--
Gabriel Genellina



From rcdailey at gmail.com  Sat Aug 11 18:00:57 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Sat, 11 Aug 2007 17:00:57 -0500
Subject: I am giving up perl because of assholes on clpm -- switching to
	Python
In-Reply-To: <Lc1186058698244350x8ae3b4c@earth.podro.com>
References: <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d@giganews.com>
	<Lc1186058698244350x8ae3b4c@earth.podro.com>
Message-ID: <496954360708111500k6764d019p7cbf74b1df399b94@mail.gmail.com>

I had this very same problem with the doxygen mailing list... doxygen is
such a great tool but full of assholes in their mailing list.

On 8/2/07, Jamie <nospam at geniegate.com> wrote:
>
> In <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d at giganews.com>,
> Martha_Jones at tx.net mentions:
> >Python is a better language, with php support, anyway, but I am fed up
> >with attitudes of comp.lang.perl.misc. Assholes in this newsgroup ruin
> >Perl experience for everyone. Instead of being helpful, snide remarks,
> >back-biting, scare tactings, and so on proliferate and self
> >reinforce. All honest people have left this sad newsgroup. Buy bye,
> >assholes, I am not going to miss you!!!
> >
> >Martha
>
> I've heard people tell the same story, that perl folks are... rude.
>
> Actually, I've pretty much heard (and noticed) that about linux, too.
>
> Yet, linux is still a good operating environment, so is perl.
>
> You'll find rude people everywhere you look. While it may be true that
> there is a higher percentage of hard-core tech folks who might lack
> social skills, at least they don't err.. well, maybe they do.. byte. :-)
>
> Seriously, it is one of the problems facing perl (and linux) people ARE
> turned away by the attitude. It is rather embarassing/unflattering when
> someone is critical of your work.
>
> I see a lot of ideas about things should be "made easier" but I think
> thats the wrong course. We really just need to be nicer to new folks.
>
> Jamie
> --
> http://www.geniegate.com                    Custom web programming
> Perl * Java * UNIX                        User Management Solutions
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From gerard.blais at gmail.com  Fri Aug 17 09:38:18 2007
From: gerard.blais at gmail.com (Gerry)
Date: Fri, 17 Aug 2007 13:38:18 -0000
Subject: Question on SPE and pwintypes.dll
Message-ID: <1187357898.740425.33170@r29g2000hsg.googlegroups.com>

   I'm running SPE 8.3.c under XP, on a new PC.

   The files for SPE and Python were copied to the new machine, but
the OS wasn't migrated, so the registry didn't know about either.

   I reinstalled Python 2.5.1, and Python seems fine.

   I made a shortcut to SPE.pyw.  Clicking on the shortcut gives an
error pop-up, application failed to start cannot find pwintypes.dll.
When I click "OK", SPE seems to start normally.

   Any idea what's up?  Googling for pwintypes.dll didn't give me any
hits.

   Gerry



From bob at cosy.com  Tue Aug 14 13:54:51 2007
From: bob at cosy.com (Bob Armstrong)
Date: Tue, 14 Aug 2007 10:54:51 -0700
Subject: (Re)announcing APL 2007
In-Reply-To: <1186406430.744134.298400@x35g2000prf.googlegroups.com>
References: <5hnkb3F3hus4jU1@mid.individual.net>
	<1186406430.744134.298400@x35g2000prf.googlegroups.com>
Message-ID: <1187114091.809246.308200@x40g2000prg.googlegroups.com>

On Aug 6, 7:20 am, Paul Mansour <p... at carlislegroup.com> wrote:
> APL2007 Roll Call: Is anyone going to this?

 I'm thinking of going also , setting up some arrangement to provide
an introductory tutorial to my free and open 4th.CoSy .

My website is transiting between hosts so I don't recommend even
looking at it right now . But by the end of the month I should be
uploading a system with the Forth integrated and usable multiple
windows ala K's "electric gui" .

Hopefully by conference time , I'll have my recursive , quite APLish
syntax , interpreter working .



From bj_666 at gmx.net  Wed Aug 15 15:09:30 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 15 Aug 2007 19:09:30 GMT
Subject: "Variable variable name" or "variable lvalue"
References: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
Message-ID: <5ih1baF3mc1akU3@mid.uni-berlin.de>

On Wed, 15 Aug 2007 10:42:02 -0700, mfglinux wrote:

> I would like to know how to declare in python a "variable name" that
> it is in turn a variable
> In bash shell I would wrote sthg like:
> 
> for x in `seq 1 3`
> do
>   M$i=Material(x)  #Material is a python class
> done

You want a dictionary.

M = dict()
for x in xrange(1, 4):
    M[x] = Material(x)

Ciao,
	Marc 'BlackJack' Rintsch


From martin at v.loewis.de  Thu Aug 23 22:26:20 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 24 Aug 2007 04:26:20 +0200
Subject: MsiLib
In-Reply-To: <mailman.200.1187901834.32294.python-list@python.org>
References: <mailman.172.1187876423.32294.python-list@python.org>	<46CDE72F.2090009@v.loewis.de>
	<mailman.200.1187901834.32294.python-list@python.org>
Message-ID: <46CE41CC.7010105@v.loewis.de>

> Thank you. I would be willing to help out, but as of now I have no idea
> how to get started on it. If you would be willing to provide some
> guidance, then I would be fine with giving it a shot if nothing more. My
> guess is that it would have to implement the MsiRecordGetString function
> so that it is accessible, but I don't know beyond that.

See PC/_msi.c. If I give further guidance than that, I may well do it
myself.

Regards,
Martin


From steven.bethard at gmail.com  Sun Aug 12 18:09:52 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 12 Aug 2007 16:09:52 -0600
Subject: A dumb question about a class
In-Reply-To: <mailman.1887.1186955369.22759.python-list@python.org>
References: <mailman.1887.1186955369.22759.python-list@python.org>
Message-ID: <TqSdnWYzVdWvGCLbnZ2dnUVZ_saknZ2d@comcast.com>

Dick Moores wrote:
> I'm still trying to understand classes. I've made some progress, I 
> think, but I don't understand how to use this one. How do I call it, or 
> any of its functions? It's from the Cookbook, at 
> <http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/523048>.

The short answer is that use should look something like::

     >>> plist = PrimeList()
     >>> plist.contains(32)
     False
     >>> plist.contains(23)
     True

But this doesn't seem like a particularly good recipe. Seems like you 
would really rather be writing code like::

     >>> plist = PrimeList()
     >>> 1 in plist
     False
     >>> 2 in plist
     True
     >>> 22 in plist
     False
     >>> 23 in plist
     True
     >>> 782 in plist
     False
     >>> 787 in plist
     True

Here's how I'd write the recipe::

     import itertools

     def iter_primes():
         # an iterator of all numbers between 2 and +infinity
         numbers = itertools.count(2)

         # generate primes forever
         while True:

             # get the first number from the iterator (always a prime)
             prime = numbers.next()
             yield prime

             # remove all numbers from the (infinite) iterator that are
             # divisible by the prime we just generated
             numbers = itertools.ifilter(prime.__rmod__, numbers)


     class PrimeList(object):
         def __init__(self):
             # infinite iterator of primes
             self._prime_iter = iter_primes()

             # the last prime we've seen
             self._last_prime = None

             # all primes seen so far
             self._prime_set = set()

             # add the first prime (so that _last_prime is set)
             self._add_prime()

         def __contains__(self, n):
             # add primes to the list until we exceed n
             while n > self._last_prime:
                 self._add_prime()

             # return True if n is one of our primes
             return n in self._prime_set

         def _add_prime(self):
             # take a prime off the iterator and update the prime set
             self._last_prime = self._prime_iter.next()
             self._prime_set.add(self._last_prime)


STeVe


From carsten at uniqsys.com  Fri Aug 31 00:06:54 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 31 Aug 2007 00:06:54 -0400
Subject: list index()
In-Reply-To: <1188530220.815429.281380@i38g2000prf.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<87bqcod2gq.fsf@benfinney.id.au>
	<1188517370.998114.119940@q4g2000prc.googlegroups.com>
	<mailman.179.1188521931.28954.python-list@python.org>
	<1188530220.815429.281380@i38g2000prf.googlegroups.com>
Message-ID: <20070831035715.M82687@uniqsys.com>

On Thu, 30 Aug 2007 20:17:00 -0700, zzbbaadd wrote
> Well IN was what I was looking for and would have saved this thread.
> However I don't believe IN showed up on the doc web page that has 
> list methods, where I found index().

They're not on the exact same page, but index() is in section 3.6.4 of the
library reference (http://docs.python.org/lib/typesseq-mutable.html), whereas
"in" is in section 3.6 of the library reference
(http://docs.python.org/lib/typesseq.html). I'm wondering how you managed to
find subsection 3.6.4 without finding section 3.6.

--
Carsten Haese
http://informixdb.sourceforge.net


From raims at dot.com  Mon Aug 13 06:20:16 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Mon, 13 Aug 2007 12:20:16 +0200
Subject: retrieving ATOM/FSS feeds
References: <f9oecg$249v$1@sxnews1.qg.com>
	<1i2s7c9.13bkwbfsd3mbqN%raims@dot.com>
	<f9p9vr$2bb7$1@sxnews1.qg.com>
Message-ID: <1i2sa2z.sr8171gbnn76N%raims@dot.com>

_spitFIRE <timid.gentoo at gmail.com> wrote:
> For the same feed (where the content producer doesn't provide the full
> article!) I was able to see the complete post in other RSS aggregators (like
> Blam). I wanted to know how they were able to collect the feed!

Perhaps in the feed itself there's the link for the full content feed.

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From ldo at geek-central.gen.new_zealand  Mon Aug 27 05:33:45 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 27 Aug 2007 21:33:45 +1200
Subject: my parser.py isn't imported
References: <874pimqpei.fsf@wilson.homeunix.com>
	<1188166462.066732.123620@i13g2000prf.googlegroups.com>
	<87ps19q5fs.fsf@wilson.homeunix.com>
Message-ID: <fau5l8$o0i$1@lust.ihug.co.nz>

In message <87ps19q5fs.fsf at wilson.homeunix.com>, Torsten Bronger wrote:

> So I'd like to know a means to tell *explicitly* what I want to
> import.  Maybe I could use the imp module but that's ugly.

That seems to be the standard Python-provided way to explicitly import the
file you want from the place you want.

> I mean, there are hundreds of modules on my harddisk, so trying to avoid
> nameclashs should not be the solution...

That is what namespace qualifiers are for, e.g.

    import my_custom_stuff.parser

versus

    import parser

> John Machin writes:
>
>> 2. Failure to RTFabulousM:
>> """
>> Details of the module searching and loading process are
>> implementation and platform specific. It generally involves
>> searching for a ``built- in'' module with the given name and then
>> searching a list of locations given as sys.path.
>> """
> 
> ... the whole systems seems largely arbitrary, which I don't
> believe.  ;-)

The documentation <http://docs.python.org/lib/module-sys.html> says quite
clearly that the search order is controlled by sys.path. So why not
manipulate that to get the effect you want?

> "parser" is built-in on Windows but not on Linux.

It is standard on all platforms
<http://docs.python.org/lib/module-parser.html>.



From bignose+hates-spam at benfinney.id.au  Tue Aug 28 20:58:27 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 29 Aug 2007 10:58:27 +1000
Subject: "Try:" which only encompasses head of compound statement
References: <1188250535.607963.42540@22g2000hsm.googlegroups.com>
	<87wsvgfszm.fsf@benfinney.id.au>
	<13d7898odj2g19b@corp.supernews.com>
	<87fy24fdgf.fsf@benfinney.id.au>
	<1188345076.396437.111160@w3g2000hsg.googlegroups.com>
Message-ID: <873ay3f970.fsf@benfinney.id.au>

Jameson.Quinn at gmail.com writes:

> In real life, I want to set some return values to sensible defaults
> if the file doesn't exist, but I want the errors from inside the
> block to trickle up as normal.

Sure. Just be careful only to catch the exceptions that you do want to
handle at that level of the code, and the others will propagate
normally.

> And yes, I can easily use a temporary variable for the open file,
> but it really seems to me that this defeats the purpose of the
> 'with' statement - if this were something more dangerous than a
> file, I'd feel mighty leery of having it in a temporary variable
> outside a 'with' for even a moment.

You seem to be confused about one or both of "variables" (which Python
doesn't really have) and the 'with' statement.

When you write::

    input_file = open("foo.txt")
    with input_file:
        # do stuff

there's no "temporary variable". You've merely bound the name
'input_file' to the file object; it's the same file object as is then
used in the 'with' statement. You could bind a dozen other names to
the object and it would still be the same file object.

So, when the 'with' block exits, the context manager will close the
file object, no matter how many names you bind to it.

> So, the options are:
> -temporary variable - could this EVER be more dangerous than the with
> statement (KeyboardInterrupt which is later caught and handled?)

Since it's not a "temporary variable" but rather just a way to refer
to the file object, I don't see the issue you're describing. However
you refer to it, that one file object will be closed when the 'with'
block exits.

> -'tunnel' internal exceptions past the try by wrapping them in a
> TunnelException and then unwrapping them with a containing try block.
> 
> The second looks like a hack to me

Yes, it is. Catch the exceptions you want to handle, let the rest
propagate normally. The context manager created by the 'with'
statement will handle closing the file *and* propagate the exception
normally.

    <URL:http://www.python.org/dev/peps/pep-0343/>

> and the first still feels dangerous.

If it's still that way, perhaps you could be more explicit about what
danger you think exists?

-- 
 \     "Are you pondering what I'm pondering?" "I think so, Brain, but |
  `\    pants with horizontal stripes make me look chubby."  -- _Pinky |
_o__)                                                   and The Brain_ |
Ben Finney


From geoff.bache at pobox.com  Tue Aug 28 13:57:36 2007
From: geoff.bache at pobox.com (geoffbache)
Date: Tue, 28 Aug 2007 10:57:36 -0700
Subject: Getting subprocesses to be hidden on Windows
In-Reply-To: <1188310805.381229.13270@y42g2000hsy.googlegroups.com>
References: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
	<1188250115.875160.276780@r29g2000hsg.googlegroups.com>
	<1188292102.065625.82670@22g2000hsm.googlegroups.com>
	<1188308231.196513.291260@19g2000hsx.googlegroups.com>
	<1188309590.114918.257670@y42g2000hsy.googlegroups.com>
	<1188310805.381229.13270@y42g2000hsy.googlegroups.com>
Message-ID: <1188323856.443131.223550@r34g2000hsd.googlegroups.com>


OK, more background needed. I develop the TextTest tool which is a
generic test tool that starts tested applications from
the command line. The idea is that it can handle any system under test
at all, whatever language it's written in. Preferably
without requiring a bunch of changes to the tested code before
starting. I'd like to be able to pass some sort of flag to
ensure that the system under test *and everything it starts* remain
hidden.

I can do as you suggest in my PyGTK GUI, of course, but that's only
one system under test. A generic solution, if there
is one, would be much better. I felt like there ought to be one
because :

a) It's easy on UNIX and
b) I managed to hide the system under test fairly easily, just not its
child windows and dialogs.

Thanks for the help, anyway, it's another fallback if I can't find a
solution.



From goldtech at worldpost.com  Sat Aug  4 18:51:27 2007
From: goldtech at worldpost.com (goldtech)
Date: Sat, 04 Aug 2007 15:51:27 -0700
Subject: Client-side HTML form processing with Python?
In-Reply-To: <mailman.1628.1186265746.22759.python-list@python.org>
References: <1186263839.778333.143200@d30g2000prg.googlegroups.com>
	<mailman.1628.1186265746.22759.python-list@python.org>
Message-ID: <1186267887.116300.301280@x35g2000prf.googlegroups.com>

Looks like  Tkinter is the way to do it.

There's always a way with Python - good stuff!



From theshadowx at gmail.com  Thu Aug 23 15:17:21 2007
From: theshadowx at gmail.com (TheShadow)
Date: Thu, 23 Aug 2007 19:17:21 -0000
Subject: Question about embedding python in C++
In-Reply-To: <vUjzi.51$L_7.47@newsfe16.phx>
References: <1187891085.147246.19380@i38g2000prf.googlegroups.com>
	<vUjzi.51$L_7.47@newsfe16.phx>
Message-ID: <1187896641.618261.51350@e9g2000prf.googlegroups.com>

On Aug 23, 11:57 am, Farshid Lashkari <n... at spam.com> wrote:
> TheShadow wrote:
> > When extending python in c/c++ after you register a module is there a
> > way in c/c++ to check if they were correctly registered?
>
> > Cause I'm having the problem where when I execute the the python
> > script it finds the module but none of the functions.
>
> Are you calling Py_InitModule(...) in your initmodule function? If so,
> Py_InitModule(...) returns a reference to the module object. You can use
> this object to double check that your function names exist in the
> modules dictionary. Most likely, there is an error in your code. If you
> post it, it would be easier to tell what the problem is.
>
> -Farshid

Alright that was a dead end. Here is the source code.

bool CPythonModule::Register()
{
	bool bReturn = false;
	unsigned int uiSize = static_cast<unsigned
int>(m_LPyMethodDefs.size());
	if (m_LPyMethodDefs.size() > 0)
	{
		m_pEmbMethods = new PyMethodDef[m_LPyMethodDefs.size()+1];
		unsigned int uiCounter = 0;

		IterQPyMethodDefs iterMethods = m_LPyMethodDefs.begin();

		while (m_LPyMethodDefs.end() != iterMethods)
		{
			m_pEmbMethods[uiCounter].ml_name =
m_LPyMethodDefs.front().sName.c_str();
			m_pEmbMethods[uiCounter].ml_meth =
m_LPyMethodDefs.front().pFunction;
			m_pEmbMethods[uiCounter].ml_flags = m_LPyMethodDefs.front().iFlags;
			m_pEmbMethods[uiCounter].ml_doc =
m_LPyMethodDefs.front().sDoc.c_str();

			++uiCounter;
			++iterMethods;
		}

		PyMethodDef PyMethodNullDef = {NULL, NULL, 0, NULL};

		m_pEmbMethods[uiSize] = PyMethodNullDef;

		Py_InitModule(m_sModuleName.c_str(),m_pEmbMethods);

		//PythonInterfaceInst->RegisterModule(this);

		m_pInitFunc();

		bReturn = true;
	}
	return bReturn;
}



From skip at pobox.com  Thu Aug  2 14:30:00 2007
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 2 Aug 2007 13:30:00 -0500
Subject: __call__ considered harmful or indispensable?
Message-ID: <18098.8872.263489.36952@montanaro.dyndns.org>


I don't personally use __call__ methods in my classes, but I have
encountered it every now and then here at work in code written by other
people.  The other day I replaced __call__ with a more obvious method name,
so now instead of executing

    obj(foo, bar, baz)

the code in question is

    obj.execute(foo, bar, baz)

In this case there was a bug.  Depending on inputs, sometimes obj
initialized to a class, sometimes an instance of that class.  (I fixed that
too while I was at it.)  The problem was that the use of __call__ obscured
the underlying bug by making the instance as well as the class callable.

In this particular case it was clearly unnecessary and just obfuscated the
code.  I'm wondering, are there some general cases where __call__ methods of
a user-defined class are simply indispensable?

Thx,

Skip



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Aug 27 03:53:27 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 27 Aug 2007 09:53:27 +0200
Subject: How to replace a method in an instance.
In-Reply-To: <1187984450.138147.62780@e9g2000prf.googlegroups.com>
References: <mailman.258.1187971369.32294.python-list@python.org>
	<1187971953.261328.219000@q3g2000prf.googlegroups.com>
	<46cf2ba2$0$30562$426a74cc@news.free.fr>
	<1187984450.138147.62780@e9g2000prf.googlegroups.com>
Message-ID: <46d282a9$0$415$426a74cc@news.free.fr>

kyosohma at gmail.com a ?crit :
> On Aug 22, 12:48 am, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
>> kyoso... at gmail.com a ?crit :
>>
(snip)

>>> Of course, a function in a
>>> class is also know as a method.
>> Less obvious but still wrong !-)
> 
> 
> I wish the authors of the Python books would get a clue then.

I'd think that at least some authors of some Python books would explain 
all this much better than I did. But FWIW, all these rules are clearly 
documented in the Fine Manual.

> 
(snip)
> I'm not going to help with these class / instance / whatever any more
> and leave it to all you professionals.

How do you think I learned ? One of the big things with usenet is that 
you get a chance to be corrected when you're wrong, and I personnally 
owe a lot of thanks to all the people that corrected me so far and still 
correct me.

> Yes, it you can use self in an outside method, but the way the OP
> asked the question and the nature of the traceback pointed to it just
> being a normal function, 

Indeed, Steve's problem was that the function he attached to his 
instance was *not* wrapped into a method object.



From hd1956 at yahoo.com  Mon Aug 20 18:47:16 2007
From: hd1956 at yahoo.com (hd1956 at yahoo.com)
Date: Mon, 20 Aug 2007 15:47:16 -0700
Subject: Newbee Question
In-Reply-To: <1187622390.854759.162320@q3g2000prf.googlegroups.com>
References: <mailman.15.1187620149.26576.python-list@python.org>
	<1187621470.484615.7010@i13g2000prf.googlegroups.com>
	<mailman.19.1187621934.26576.python-list@python.org>
	<1187622390.854759.162320@q3g2000prf.googlegroups.com>
Message-ID: <1187650036.450645.185500@a39g2000hsc.googlegroups.com>

On Aug 20, 11:06 am, kyoso... at gmail.com wrote:
> On Aug 20, 9:58 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
>
>
>
>
>
> > On 8/20/07, kyoso... at gmail.com <kyoso... at gmail.com> wrote:
>
> > > On Aug 20, 9:23 am, "HD1956" <hd7... at hotmail.com> wrote:
> > > > This is probably a simple code. I am a truck driver who gets paid by
> > > > stops and cases. I am trying to figure out how to code my stop pay. I
> > > > get 40 cents per stop up to 22 stops, and $1.40 per stops after that.
>
> > > def calc(num):
> > >         if num < 23:
> > >                 return 0.4 * num
> > >         else:
> > >                 overtime = num - 22
> > >                 x = 0.4 * 22
> > >                 x += overtime * 1.4
> > >                 return x
>
> > > # Use your own brain next time
>
> > > Mike
>
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
>
> > Mike,
>
> > I wonder if we were both just duped into helping someone with their homework...
>
> > Shawn
>
> I like to write code, so it's not a big deal when it's something so
> simple. Still, that is beyond dumb! Nice code, by the way.
>
> Mike- Hide quoted text -
>
> - Show quoted text -

Thanks for the help. By the way I am trying to learn the python after
work and on weekends. If it was a dumb question, to this group, I will
not bother you all again.
Without help it will take me longer to learn. Thanks



From __peter__ at web.de  Tue Aug  7 04:03:32 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 07 Aug 2007 10:03:32 +0200
Subject: Regular Expression Groups - loop
References: <1186472689.488634.23360@b79g2000hse.googlegroups.com>
Message-ID: <f9990l$t0r$02$1@news.t-online.com>

 shahargs at gmail.com wrote:

> I'm trying to write application which parse one page to sentences and
> then, check every group for few things.
> 
> The code:
> rawstr = r"""([^.?!]+[.?!])"""
> regex=re.compile(rawstr)
> matchs=regex.search(document)
> document, is the text i parsing. I cheked it in Kodos, and everything
> worked well. but, i'm trying to write for loop which check every
> group.
> 
> I tried:
> for group in matchs.groups():
> but then, it's check only the first group. and i tried:
> for group in matchs.group():
> but then it's checking every letter, not every sentence.
> 
> is anyone know how i should write this loop to check every group on
> the groups collection that the regular expression return?

A group denotes a subexpression of a single match:

>>> re.compile("(a+)(b*)").search("xaaabbxbb").groups()
('aaa', 'bb')

To get multiple matches use the findall() or finditer() methods, e. g.

>>> for match in  re.compile("([^.?!]+[.?!])").finditer("Is that what you
want? Yes! At least I think so..."):
...     match.group()
...
'Is that what you want?'
' Yes!'
' At least I think so.'

Peter


From ppgoes at gmail.com  Mon Aug  6 09:04:51 2007
From: ppgoes at gmail.com (PPGOES)
Date: Mon, 6 Aug 2007 06:04:51 -0700 (PDT)
Subject: wxpython with python 2.5
In-Reply-To: <4a7f84ac0708020924v73dee05eq76d10507e3c2cad5@mail.gmail.com>
References: <4a7f84ac0708020924v73dee05eq76d10507e3c2cad5@mail.gmail.com>
Message-ID: <12015880.post@talk.nabble.com>


Try with this:

import wxversion
wxversion.select("2.8")

import wx




G-18 wrote:
> 
> Hello,
> 
> 
>      I am trying to get wxpython to run with python 2.5 without any
> success.
> wx works prefectly in python 2.4. below is the error code i get when i try
> to run the code.
> File "demo.py", line 3, in <module>
>     import Main
>   File "/tmp/wxPython/Main.py", line 32, in <module>
>     import wx                  # This module uses the new wx namespace
> ImportError: No module named wx
> 
> Any help in getting wxpython to run in 2.5 would be greatly appreciated.
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 

-- 
View this message in context: http://www.nabble.com/wxpython-with-python-2.5-tf4207124.html#a12015880
Sent from the Python - python-list mailing list archive at Nabble.com.



From __peter__ at web.de  Tue Aug  7 07:08:23 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 07 Aug 2007 13:08:23 +0200
Subject: seeking tinter module
References: <46b849cf$0$21841$426a74cc@news.free.fr>
Message-ID: <f99jr9$33f$01$1@news.t-online.com>

Jean-Fran?ois Pi?ronne wrote:

> I'm looking for a module name tinter (not tkinter...)
> 
> from http://www.vex.net/parnassus/apyllo.py?i=97497223
> status: Dead and Gone
> 
> Google return no location to download it, only a few
> articles mentionned it, for example:
> http://www.ibm.com/developerworks/linux/library/l-python6.html
> 
> 
> Does someone has still a copy of this module?

http://www.google.com/codesearch?q=lang%3Apython+file%3Atinter.py&hl=de&btnG=Code+suchen

gives one hit.

Peter


From splifingate at gmail.com  Mon Aug 20 23:34:36 2007
From: splifingate at gmail.com (ah)
Date: Mon, 20 Aug 2007 23:34:36 -0400
Subject: What does this thread have to do with classical music,
In-Reply-To: <180820070841431634%erfc@caballista.org>
References: <7nnh7350b5h25ghocra72b23mmsnnkj8bh@4ax.com>
	<469392cd$0$97226$892e7fe2@authen.yellow.readfreenews.net>
	<469445b3$0$4819$8f2e0ebb@news.shared-secrets.com>
	<4694e124$0$97214$892e7fe2@authen.yellow.readfreenews.net>
	<46957ef1$0$10227$8f2e0ebb@news.shared-secrets.com>
	<46963170$0$97261$892e7fe2@authen.yellow.readfreenews.net>
	<46981df7$0$12095$8f2e0ebb@news.shared-secrets.com>
	<46990784$0$97223$892e7fe2@authen.yellow.readfreenews.net>
	<4699297c$0$4706$4c368faf@roadrunner.com>
	<140720071431044860%erfc@caballista.org>
	<46a3a1a7$0$15115$8f2e0ebb@news.shared-secrets.com>
	<220720072148091069%erfc@caballista.org>
	<46a5385d$0$4832$8f2e0ebb@news.shared-secrets.com>
	<250720071834457296%erfc@caballista.org>
	<46aceaa5$0$13281$8f2e0ebb@news.shared-secrets.com>
	<290720071853200863%erfc@caballista.org>
	<46b12539$0$4807$8f2e0ebb@news.shared-secrets.com>
	<010820072033374341%erfc@caballista.org>
	<46c63474$0$4844$8f2e0ebb@news.shared-secrets.com>
	<180820070841431634%erfc@caballista.org>
Message-ID: <46c90727$0$14433$8f2e0ebb@news.shared-secrets.com>

Art Deco wrote:
> ah <splifingate at gmail.com> wrote:
>>Art Deco wrote:
>>> ah <splifingate at gmail.com> wrote:
>>>>Art Deco wrote:
>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>Art Deco wrote:
>>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>>Art Deco wrote:
>>>>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>>>>Art Deco wrote:
>>>>>>>>>>> Who wrote?
>>>>>>>>>>> 
>>>>>>>>>>> 
>>>>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>>>>> 
>>>>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>>>>> 
>>>>>>>>>>> How many more times will you be asking the same tired, lame
>>>>>>>>>>> questions,
>>>>>>>>>>> Tholen?
>>>>>>>>>>
>>>>>>>>>>Till 2056?
>>>>>>>>> 
>>>>>>>>> At that point, he will have made the Thirty Years Pset War look like
>>>>>>>>> 1967 in the Sinai.
>>>>>>>>
>>>>>>>>It must have been Hell to keep a garden during those times.
>>>>>>>>
>>>>>>>>Did they all eat jerky, or what?
>>>>>>> 
>>>>>>> Worse -- worm-laden hardtack.
>>>>>>
>>>>>>Luxury!
>>>>>>
>>>>>>Why, I remember when I was a lad . . . we used to watch the local churls
>>>>>>across the fences eating that well.
>>>>>>
>>>>>>We only had millings (and (occasionally) water) on Tuesdays and Fridays.
>>>>> 
>>>>> Grog and hardtack, life is good!
>>>>
>>>>?Viva la basura!
>>> 
>>> Vivat les ordures!
>>
>>Vivara los trunctiato!
> 
> das Leben ist gut!

de Handel esta disgustipado!


From vedrandekovic at v-programs.com  Sat Aug 18 09:15:22 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Sat, 18 Aug 2007 06:15:22 -0700
Subject: python video editing libs
In-Reply-To: <1187406096.013266.199030@m37g2000prh.googlegroups.com>
References: <46c64393$1@news.orcon.net.nz>
	<1187406096.013266.199030@m37g2000prh.googlegroups.com>
Message-ID: <1187442922.452889.53580@k79g2000hse.googlegroups.com>

On 18 kol, 05:01, math2life <QJing... at gmail.com> wrote:
> On Aug 17, 5:55 pm, DavidM <nos... at nowhere.com> wrote:
>
>
>
> > Hi,
>
> > Does anyone know of any python or python-wrapped libs for video editing?
>
> > My requirements:
> >  - open video files in any of the popular containers (avi, mov, ogg, flv
> >    etc) and all the popular codecs (mpeg3, theora, mpeg2 etc) and audio
> >    codecs (raw, wav, mp3 etc)
> >  - get an abstract video clip object on opening such a file
> >  - query the clip object to determine stuff like length, framerate, size
> >    etc
> >  - iterate through all the frames, and get a frame object with each frame
> >  - with a frame object, be able to access individual pixels, add graphic
> >    images (eg, via PIL), export frame to graphics file (eg jpeg)
> >  - with video clip object, be able to change framerate, insert/remove
> >    frames etc, and render out with desired a-v codecs and container
> >  - good well-documented API, preferably some usage examples
>
> > Does anything like this exist?
>
> > Cheers
> > David
>
> Python OpenCV wrapper will meet  most of your need, but I am not
> sure ,
> plz check it out.

Hi,

I'am not sure, try pymedia

Regards,
Vedran



From __peter__ at web.de  Fri Aug 24 03:52:23 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 24 Aug 2007 09:52:23 +0200
Subject: comparing two lists
References: <mailman.180.1187886381.32294.python-list@python.org>	<fakgtj$c3d$00$1@news.t-online.com>	<mailman.190.1187892928.32294.python-list@python.org>
	<fakvli$4da$01$1@news.t-online.com>
	<mailman.233.1187940106.32294.python-list@python.org>
Message-ID: <fam2no$d9r$00$1@news.t-online.com>

Ladislav Andel wrote:

> need to be stopped before deleting any instance from items.
> So I need to call stopLoop method in the given item in items before it
> gets removed.
> If there is any addition to items it's quite easy to call
> item.startLoop() method.

Unless you want to rely on the __del__ method or introduce another
complication (weak references) you have to be explicit:

# untested
# removing items
db_items = set(Item(**d) for d in dblist)
delenda = items - db_items
for item in delenda:
    item.stopLoop()
    items.remove(item)

> (I use twisted but it should not make any difference):

I've not worked with twisted, so I can't confirm that.
I can imagine that they provide their own way to spell a finalizer...

Peter


From exarkun at divmod.com  Thu Aug  2 16:03:24 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 2 Aug 2007 16:03:24 -0400
Subject: python 3.0, pywin32 and scipy
In-Reply-To: <5heos0F3jael1U1@mid.uni-berlin.de>
Message-ID: <20070802200324.4947.837812919.divmod.quotient.17657@ohm>

On Thu, 02 Aug 2007 21:16:04 +0200, "Diez B. Roggisch" <deets at nospam.web.de> wrote:
>vml schrieb:
>> Hello,
>>
>>
>> I am trying to promote python in my job, my collegue only see matlab
>> and microsoft scripting language.
>> I understood that there willl be no backward compatibility between
>> python 2.x and 3.0, does it means that:
>>
> [snip]
>
>You mean C#, the language that has seen 3 major revisions in the last 6
>years of existence, with C# 3 being announced already? And the .NET SDK,
>that happily strode along with that? Compared to python, that has been
>started in 1991 and now approaches it's third incarnation, I'd say
>python has a record of steadiness that surpasses that of MS-based tools
>by any means.

This is not a valid comparison.  In fact, C# 3 is completely backwards
compatible with C# 2, just as C# 2 was backwards compatible with C# 1.

Jean-Paul


From bronger at physik.rwth-aachen.de  Fri Aug 24 05:11:21 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 24 Aug 2007 11:11:21 +0200
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<mailman.234.1187941149.32294.python-list@python.org>
Message-ID: <87ir7570w6.fsf@wilson.homeunix.com>

Hall?chen!

Evan Klitzke writes:

> On 8/23/07, Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
>
>> Some LaTeX users in Aachen thought about a general-use markup
>> language this spring.  I wrote some code and a rough project
>> description, however, we could need some help.
>>
>> If you are interested, visit the provisional project page at
>> http://latex-bronger.sourceforge.net/gummi/
>
> I briefly looked over the specification, and it looks like you're
> targeting a LaTeX backend. Are you planning on outputting to LaTeX
> and using that to generate e.g. PDF versions of documents, or do
> you plan to have a real PDF/Postscript backend?

Yes, I plan to use LaTeX as a mere backend slave for getting PDFs.
I will *try* to keep the LaTeX readable but mostly for debugging
purposes.  I don't think that a native PDF backend is helpful on the
short run because LaTeX just works well for this (I don't like
LaTeX's usability but I do like TeX's typesetting abilities).

There is another way to get PDFs which I certainly want to give a
try sometime, namely XSL:FO.

However, I don't know how feasible direct PDF output is.  I'm
somewhat scared by line breaking algorithms, hyphenation and all
this, though.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From tomtim20 at gmail.com  Fri Aug 24 09:54:53 2007
From: tomtim20 at gmail.com (tomtim20 at gmail.com)
Date: Fri, 24 Aug 2007 06:54:53 -0700
Subject: Unequal Length Maze
In-Reply-To: <5j85h5F3t20idU1@mid.uni-berlin.de>
References: <1187941996.333191.323540@z24g2000prh.googlegroups.com>
	<5j85h5F3t20idU1@mid.uni-berlin.de>
Message-ID: <1187963693.724859.116810@m37g2000prh.googlegroups.com>

On Aug 24, 4:41 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> tomti... at gmail.com schrieb:
>
> > Hi All,
> > what's the best algorithm to solve such problem ?
> >http://www.stetson.edu/~efriedma/unequal/
>
> > I will really appreciate some pieces of code (python).
>
> If you pay me 100$ (really a bargain), you get a solution in python.
>
> Diez

What about Barack Obama Autographed Photo ?



From thn at mail.utexas.edu  Wed Aug 15 11:04:03 2007
From: thn at mail.utexas.edu (Thomas Nelson)
Date: Wed, 15 Aug 2007 08:04:03 -0700
Subject: Combinatorial of elements in Python?
In-Reply-To: <mailman.2010.1187185183.22759.python-list@python.org>
References: <9e2f512b0708142203m782b0e10s817fb4d061ba0e46@mail.gmail.com>
	<46C2ED11.70904@freakmail.de>
	<mailman.2010.1187185183.22759.python-list@python.org>
Message-ID: <1187190243.875896.103830@i13g2000prf.googlegroups.com>

On Aug 15, 8:39 am, "Sebastian Bassi" <sba... at clubdelarazon.org>
wrote:
> That was easy :)
> What about extending it for N elements inside the dictionary? Sounds
> like a work for a recursive function.

Here's my attempt:
[code]
def backtrack(groups,position=0, answer=''):
	if position==len(groups):
		yield answer
	else:
		for e in groups[position]:
			for x in backtrack(groups,position+1,answer+e):
				yield x


groups = [
	['a','b','c'],
	['w','x','y','z'],
	['1','2']]


for i in backtrack(groups):
	print i
[/code]

If you need to put the result into a set, you can.  As for the
original question "Is there a builtin function for this", what you're
asking is essentially the standard recursive backtracking algorithm.
In your case, each "layer" in the network is fully connected to the
network below it, much the way layers in a neural network are set up.
Sadly, there isn't a graph/network algorithm module in the python
standard library.  There are graph-algorithm type libraries out there
I think, but I've never used any of them, so I can't be much help.

-Tom



From mauriceling at acm.org  Sun Aug 12 03:16:22 2007
From: mauriceling at acm.org (Maurice LING)
Date: Sun, 12 Aug 2007 07:16:22 GMT
Subject: Database intensive application
In-Reply-To: <1186895306.237395.189530@z24g2000prh.googlegroups.com>
References: <1186895306.237395.189530@z24g2000prh.googlegroups.com>
Message-ID: <46beb3c3$1@news.unimelb.edu.au>

Rohit wrote:
> I am a novice. I want to know whether Python can be used to develop
> client/server database and web applications like .NET. Which is the
> best book/source to learn Python?
> 

There are database access libraries for almost every RDBMS.
Web applications using Django, CherryPy, TurboGears and many other tools
Best book(s): Dive into Python, Learning Python

maurice


From torriem at chem.byu.edu  Fri Aug 17 15:25:18 2007
From: torriem at chem.byu.edu (Michael L Torrie)
Date: Fri, 17 Aug 2007 13:25:18 -0600
Subject: why psyco using more memery in liunx?
In-Reply-To: <005d01c7e078$c13d0ed0$811ba8c0@kyom>
References: <005d01c7e078$c13d0ed0$811ba8c0@kyom>
Message-ID: <46C5F61E.2080102@chem.byu.edu>

kyo guan wrote:
> Hi all:
> 
> 	When you import psyco in python2.5, you can see the memery grow up near 40MB in linux. but the same version python and
> psyco, is only grow up 1MB under windows. 

I have a hunch it's because of how the OS's are reporting shared memory
usage.  IE, the 1 MB increase under windows may not be altogether
truthful, and neither is the reported 40 MB on linux.  Memory usage is
tricky to judge on any modern OS, as shared libraries do increase the
apparent memory use by an application, but the libraries are shared with
other applications and OS components.

> 
> kyo
> 



From carsten at uniqsys.com  Fri Aug 17 00:19:13 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 17 Aug 2007 00:19:13 -0400
Subject: defaultdict of arbitrary depth
In-Reply-To: <1187321113.841198.195100@22g2000hsm.googlegroups.com>
References: <1187321113.841198.195100@22g2000hsm.googlegroups.com>
Message-ID: <1187324353.3231.6.camel@localhost.localdomain>

On Thu, 2007-08-16 at 20:25 -0700, Paul McGuire wrote:
> [...]
> I've hacked out this recursivedefaultdict which is a
> defaultdict(defaultdict(defaultdict(...))), arbitrarily deep depending
> on the keys provided in the reference.
> 
> Please comment.
> [...]
> 
> class recursivedefaultdict(object):
>     def __init__(self):
>         self.__dd = defaultdict(recursivedefaultdict)
>     def __getattr__(self,attr):
>         return self.__dd.__getattribute__(attr)
>     def __getitem__(self,*args):
>         return self.__dd.__getitem__(*args)
>     def __setitem__(self,*args):
>         return self.__dd.__setitem__(*args)

This is shorter:

from collections import defaultdict

class recursivedefaultdict(defaultdict):
    def __init__(self):
        self.default_factory = type(self)

-- 
Carsten Haese
http://informixdb.sourceforge.net




From bbxx789_05ss at yahoo.com  Sat Aug  4 01:36:52 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Fri, 03 Aug 2007 22:36:52 -0700
Subject: Script that Navigates Page needs Javascript Functionality
In-Reply-To: <1186192690.100410.260840@g12g2000prg.googlegroups.com>
References: <1186192690.100410.260840@g12g2000prg.googlegroups.com>
Message-ID: <1186205812.203227.299730@57g2000hsv.googlegroups.com>

On Aug 3, 7:58 pm, SMERSH009 <SMERSH0... at gmail.com> wrote:
> I have a script that navigates pages and scrapes the HTML source of
> the page.
> in order to view the results I need I need python to "navigate to"
> this Javascript link:
> javascript:__doPostBack('ctl00$cpMain$pagerTop','4')  This basically
> translates into "go to page 4."
> I read the posts on this group, and from what I understand, the
> functionality I need is with simplejson? If so, what is the syntax i
> would use to execute that Javascript?
> Or am I completely off base with using simplejson altogether?
>
> Thanks for the help
> -Sam

json is a specific way of formatting strings.  If an application
expects to receive a string as input and the string is supposed be
formatted according to json, then you need to send the app a json
formatted string.

>From the brief description I just read of simplejson, it allows you to
convert python objects to a string.  What makes you think that
simplejson has anything to do with executing javascript code?

When html pages are sent to a browser, there is software in the
browser that executes any javascript on the page.  If you use python
to download source code from a server, you are not loading anything in
a browser, so no javascript executes.



From steve at holdenweb.com  Thu Aug  2 12:36:18 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Aug 2007 12:36:18 -0400
Subject: wxpython with python 2.5
In-Reply-To: <4a7f84ac0708020924v73dee05eq76d10507e3c2cad5@mail.gmail.com>
References: <4a7f84ac0708020924v73dee05eq76d10507e3c2cad5@mail.gmail.com>
Message-ID: <f8t164$nko$1@sea.gmane.org>

G wrote:
> Hello,
> 
> 
>      I am trying to get wxpython to run with python 2.5 without any 
> success. wx works prefectly in python 2.4. below is the error code i get 
> when i try to run the code.
> File "demo.py", line 3, in <module>
>     import Main
>   File "/tmp/wxPython/Main.py", line 32, in <module>
>     import wx                  # This module uses the new wx namespace
> ImportError: No module named wx
> 
> Any help in getting wxpython to run in 2.5 would be greatly appreciated.
> 
How did you install it, and was it a version specifically made to run 
with Python 2.5? You can't just install 2.5 and have it pick up all the 
libraries you installed for 2.4, you have to download and install 
updated versions.

At the moment it doesn't look as though 2.5 is seeing wxPython at all.

Sorry if this isn't the problem.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From sbassi at clubdelarazon.org  Wed Aug 15 01:03:41 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Wed, 15 Aug 2007 02:03:41 -0300
Subject: Combinatorial of elements in Python?
Message-ID: <9e2f512b0708142203m782b0e10s817fb4d061ba0e46@mail.gmail.com>

I have 2 (or more) groups of elements, and I want to get all possible
unique combinations from all of them. Is there a build-in method to do
it?

ADictionary={"one":["A","B","C","D"],"two":["H","I"]}

I want to have all possible combinations from "one" and "two", that is:

AH
BI
CH
DI
AI
BH
CI
DH

Sounds easy, but is not :)


-- 
Sebasti?n Bassi (???????)
Diplomado en Ciencia y Tecnolog?a.
GPG Fingerprint: 9470 0980 620D ABFC BE63 A4A4 A3DE C97D 8422 D43D

From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Tue Aug 28 15:54:26 2007
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J. Fromberger)
Date: Tue, 28 Aug 2007 15:54:26 -0400
Subject: Image manipulation
References: <1188328362.992426.275780@19g2000hsx.googlegroups.com>
Message-ID: <Michael.J.Fromberger-87928C.15542628082007@localhost>

In article <1188328362.992426.275780 at 19g2000hsx.googlegroups.com>,
 Slava <slava.shklyar at gmail.com> wrote:

> I need to add dynamic text to animated GIF images.
> What is a best way to do it?
> 
> Thanks.

One possibility is the GD library, which supports animated GIF.  There 
is a Python binding:

 <http://newcenturycomputers.net/projects/gdmodule.html>

I do not know, however, whether or not the Python wrapper supports the 
animated GIF portions of the library.  You'll probably have to do some 
digging.

Cheers,
-M

-- 
Michael J. Fromberger             | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/  | Dartmouth College, Hanover, NH, USA


From bj_666 at gmx.net  Sat Aug 25 06:21:20 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 25 Aug 2007 10:21:20 GMT
Subject: Joining Big Files
References: <1188035844.616831.205350@i38g2000prf.googlegroups.com>
Message-ID: <5jae50F3rgskgU1@mid.uni-berlin.de>

On Sat, 25 Aug 2007 02:57:24 -0700, mosscliffe wrote:

> I have 4 text files each approx 50mb.
> 
> I need to join these into one large text file.
> 
> I only need to do this very occasionally, as the problem has occurred
> because of upload limitations.
> 
> Bearing in mind filesize and memory useage, would I be better reading
> every line in every file and writing each line to the output file or
> is there someway I could execute some shell command.

There are some copy functions that work with file like objects in the
`shutil` module.

Ciao,
	Marc 'BlackJack' Rintsch


From kaldrenon at gmail.com  Tue Aug 21 17:30:29 2007
From: kaldrenon at gmail.com (kaldrenon)
Date: Tue, 21 Aug 2007 21:30:29 -0000
Subject: Latest models of Gibson guitars
In-Reply-To: <%xIyi.22058$aa7.17937@bignews3.bellsouth.net>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<%xIyi.22058$aa7.17937@bignews3.bellsouth.net>
Message-ID: <1187731829.843146.36220@r34g2000hsd.googlegroups.com>

On Aug 21, 5:11 pm, John McGaw <nob... at nowh.ere> wrote:
> mobile... at gmail.com wrote:
> > Reviews of latest models of best guitars, fender, gibson, yamaha, and
> > many more, with pictures and prices.
>
> Are these new guitars made of SPAM like your message and your "blog"?

That'd be bloody terrible to play, and sound awful.

Gimme a 100% Angus 12-string, or give me nothing, I say.



From f.guerrieri at gmail.com  Wed Aug 15 16:54:39 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Wed, 15 Aug 2007 22:54:39 +0200
Subject: "Variable variable name" or "variable lvalue"
In-Reply-To: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
References: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
Message-ID: <79b79e730708151354q46a35999n34a42aaf1bb9312d@mail.gmail.com>

On 8/15/07, mfglinux <mfglinux at gmail.com> wrote:
>
>
> #Let's say x=3, then Period definition is
> Period=Slab(Material1(12.5)+Material2(25)+Material3(12.5)) #Slab is a
> python class
>
> I dont know how to automatize last piece of code for any x
>



Hello,

you could use exec to create on the fly the variables as you need them (but
be aware that the use of exec can be dangerous and is probably not needed),
or you could add the proper name to a relevant dictionary (for example,
locals() ). Something like

for counter in xrange(3):
    locals()["Material" + str(counter)] = Material(12.5)


But if you need the variables only for calling Slab, you could write
something like:

material_number = 3
material_list = [Material(12.5) for x in xrange(0, counter)]
Period = Slab(sum(material_list))

bye,
francesco
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From steve at holdenweb.com  Fri Aug  3 22:27:05 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 03 Aug 2007 22:27:05 -0400
Subject: downloading files
In-Reply-To: <1186176739.765447.262720@w3g2000hsg.googlegroups.com>
References: <1186166920.757662.269340@o61g2000hsh.googlegroups.com>	<mailman.1584.1186168229.22759.python-list@python.org>
	<1186176739.765447.262720@w3g2000hsg.googlegroups.com>
Message-ID: <46B3E3F9.6060202@holdenweb.com>

Ehsan wrote:
> On Aug 3, 10:10 pm, Steve Holden <st... at holdenweb.com> wrote:
[...]
>> I'm guessing there are binary files and you are running on Windows,
>> which is inserting a carriage return before ebery newline. Try
>>
>>         localFile = open(fileName, 'wb')
>>
>> to avoid thus behavior.
[...]
> thanx Steve
> It works but could you explain more what's wrong with just 'w'?
> 

Hmm, I thought I had. 'b' stand for 'binary', and the system sends out 
exactly the bytes you right. Without the 'b' it assumes you are handling 
text, so Windows "CR/LF" line endings are converted to "LF" or reading, 
and "LF" is converted to "CR/LF" on writing.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From cjusto at neopolitan.com  Fri Aug 10 17:58:06 2007
From: cjusto at neopolitan.com (Christian Justo)
Date: Fri, 10 Aug 2007 14:58:06 -0700
Subject: No subject
Message-ID: <web-19267463@mx1.neopolitan.us>

Hi,
I'm simply trying to get mod_python working on my apache 
server but when I create a .py file the output returned 
from the browser is the code in the file and not just the 
output from the script. I have read the manual and tried 
mptest.py with an .htaccess file both in /var/www/html/ 
and still no luck. When I browse to mptest.py with Firefox 
I get the mptest.py code:

from mod_python import apache

def handler(req):
     req.content_type = 'text/plain'
     req.write("Hello World!")
     return apache.OK


This is the .htaccess file:

AddHandler mod_python .py
PythonHandler mptest
PythonDebug On

This is part of httpd.conf:
LoadModule python_module modules/mod_python.so

mod_python version:3.3.1-3
OS:Linux Fedora 7
Python version:2.5 (r25:51908, Apr 10 2007, 10:29:13)[GCC 
4.1.2 20070403 (Red Hat 4.1.2-8)]
Apache version:Apache/2.2.4 (Fedora)

I have a copy of my mod_python test page with more 
information if it's needed. Any help would be greatly 
appreciated, thank you much for your time.


From malaclypse2 at gmail.com  Fri Aug  3 16:05:10 2007
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Fri, 3 Aug 2007 16:05:10 -0400
Subject: os.listdir path error
In-Reply-To: <1186170609.001778.15230@l70g2000hse.googlegroups.com>
References: <1186170609.001778.15230@l70g2000hse.googlegroups.com>
Message-ID: <16651e80708031305q6b0fa7cak13a194d80aa4b546@mail.gmail.com>

On 8/3/07, vedrandekovic at v-programs.com <vedrandekovic at v-programs.com> wrote:
> Hello
>
> Here is my simple listdir example:
>
> >>> import os
> >>> os.listdir("C:\Python24\") # This directory relly exists
>
> Here is my error:
>
> WindowsError: [Errno 3] The system cannot find the path specified: 'l/
> *.*'


That's a somewhat surprising error.  Under 2.5, I get a more helpful
error message:

>>> import os
>>> os.listdir("C:\Python25\")
	
SyntaxError: EOL while scanning single-quoted string

That's because I've escaped the closing quote of the string with \".
Use this instead:

>>> os.listdir("C:\\Python25\\")
or
>>> os.listdir("C:/Python25/")

since windows is usually happy to use forward slashes instead of
backslashes in directory names.

-- 
Jerry


From zyzhu2000 at gmail.com  Thu Aug  2 08:50:16 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Thu, 02 Aug 2007 05:50:16 -0700
Subject: standalone process to interact with the web
In-Reply-To: <46b05aac$0$31743$426a74cc@news.free.fr>
References: <1185899130.331170.151980@e16g2000pri.googlegroups.com>
	<mailman.1375.1185900147.22759.python-list@python.org>
	<1185904623.754078.198910@e9g2000prf.googlegroups.com>
	<mailman.1379.1185905472.22759.python-list@python.org>
	<1185909098.952860.217190@j4g2000prf.googlegroups.com>
	<46b05aac$0$31743$426a74cc@news.free.fr>
Message-ID: <1186059016.461925.295520@e16g2000pri.googlegroups.com>

On Aug 1, 5:04 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> beginner a ?crit :
> (snip)
>
> > Yes exactly. I just don't want to reinvent the wheel as I imagine
> > there are already tons of libraries and frameworks that support RPC or
> > the like functions.
>
> Why go thru the pain of RPC, SOAP or such bloated horrors ? Why not just
> use plain old HTTP with a RESTful API ? Then you just need to make your
> app wsgi compliant.

I am not familiar with RESTful API. I will look into it.



From python at jayloden.com  Mon Aug 20 15:36:56 2007
From: python at jayloden.com (Jay Loden)
Date: Mon, 20 Aug 2007 15:36:56 -0400
Subject: reading a line in file
In-Reply-To: <2dc0c81b0708201207p7f83f2e0l6de15fd70be252a5@mail.gmail.com>
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>	<2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com>	<93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx>
	<2dc0c81b0708201207p7f83f2e0l6de15fd70be252a5@mail.gmail.com>
Message-ID: <46C9ED58.5080403@jayloden.com>

Shawn Milochik wrote:
> Hopefully this will help (using your input file)
> 
> #!/usr/bin/env python
> import re
> buildinfo = "input.txt"
> input = open(buildinfo, 'r')
> 
> regex = re.compile(r"^\s*build.number=(\d+)\s*$")
> 
> for line in input:
>     if re.search(regex, line):
>         print line
>         buildNum = re.sub(r"^\s*build.number=(\d+)\s*$", "\\1", line)
>         print line
>         print buildNum

If the only thing needed is this specific match text, this should be more efficient (re module and regular expressions have a lot of overhead): 

#!/usr/bin/env python
buildinfo = "input.txt"
input = open(buildinfo, 'r')

token = "build.number="
BUILDNUM = ""
for line in input:
    if line.startswith(token):
        BUILDNUM = line[len(token):-1]


print "Build number: %s" % BUILDNUM


From sbellon at sbellon.de  Sat Aug 11 08:00:17 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Sat, 11 Aug 2007 14:00:17 +0200
Subject: Destruction of generator objects
References: <20070808002852.6228ae91@cube.tz.axivion.com>
	<1186613044.494852.306970@q75g2000hsh.googlegroups.com>
	<20070809011441.05d7dfb6@cube.tz.axivion.com>
	<1186819365.988117.232230@g4g2000hsf.googlegroups.com>
	<20070811121630.1b010eab@cube.tz.axivion.com>
	<1186831173.814193.235420@o61g2000hsh.googlegroups.com>
Message-ID: <20070811140017.22a11f82@cube.tz.axivion.com>

On Sat, 11 Aug, Kay Schluehr wrote:

> Honestly, I'd recommend wrapping the generator into a function object,
> create the resource on construction ( or pass it ) and destroy it
> implementing __del__.
> 
> def gen_value(self):
>     while True:
>         yield self.iter.next()
> 
> class GeneratorObj(object):
>     def __init__(self, obj, gen):
>         self.iter = make_iter(obj)
>         self.gen  = gen(self)
> 
>     def __del__(self):
>         destroy(self.iter)
> 
>     def next(self):
>         return self.gen.next()

Ok, I think there is an __iter__ missing in order to implement the
iterator protocol, and I don't see why the generator cannot be inside
the class itself.

Anyway, I came up with this code now:

class ListGenerator(object):
    def __init__(self, iter):
        print "gen init"
        self.iter = iter
        self.gen = self._value()

    def __del__(self):
        print "gen del"
        destroy(self.iter)

    def _value(self):
        print "gen value"
        while more(self.iter):
            yield next(self.iter)

    def __iter__(self):
        print "gen iter"
        return self

    def next(self):
        print "gen next"
        return self.gen.next()

When iterating over such a generator, I see the following output:

>>> list(obj)
gen init
gen iter
gen next
gen value
gen next
gen next
gen next
gen next
['Item1', 'Item2', 'Item3', 'Item4']

But I do not see an output of "gen del" which makes me think that the
destructor is not called, thus not releasing the resource. It seems I
have not completely understood how generators work ...

-- 
Stefan Bellon


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Aug 13 09:46:18 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 13 Aug 2007 15:46:18 +0200
Subject: check if var is dict
In-Reply-To: <mailman.1909.1187002258.22759.python-list@python.org>
References: <46C02BFA.10703@al.com.au>
	<mailman.1909.1187002258.22759.python-list@python.org>
Message-ID: <46c0608a$0$427$426a34cc@news.free.fr>

Jeff McNeil a ?crit :
(top-post corrected)
> On 8/13/07, Astan Chee <stanc at al.com.au> wrote:
>> Hi,
>> I have a variable, I want to check if it is a dictionary or a string.
>> Is there any better way to do this than I've done. How I did it is by
>> doing a .items() and catching a AttributeError that it raises if its not
>> a dictionary.
>> How do i properly do it?
>> Thanks

 > You could use 'isinstance' to determine whether or not your object is
 > an instance of a particular class.
 >
 >>>> isinstance({}, dict)
 > True
 >>>> isinstance("", basestring)
 > True
 >
 > Note the use of 'basestring', which will catch unicode as well.
 >
The problem is that it will prevent passing some perfectly valid objects 
(in this case, mostly dict-like objects, and there are quite a lot of 
dict-like objects in existing Python code).


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Aug 27 08:02:24 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 27 Aug 2007 14:02:24 +0200
Subject: beginner, idiomatic python
In-Reply-To: <13d4gjm3qq0lt7c@corp.supernews.com>
References: <13cqlqbbpn0dmea@corp.supernews.com><1187898049.734696.9500@l22g2000prc.googlegroups.com><13csoronscqp7d2@corp.supernews.com><1188090322.663217.102750@22g2000hsm.googlegroups.com><13d4bucfm4m1lc4@corp.supernews.com>
	<mailman.13.1188182594.28954.python-list@python.org>
	<13d4gjm3qq0lt7c@corp.supernews.com>
Message-ID: <46d2bd01$0$427$426a74cc@news.free.fr>

bambam a ?crit :
> Thank you, I have been through the tutorial several times, I guess
> I'm just not smart enough. Perhaps I have been led astray by what
> I read here?
> 
> My code started like this:
> 
> for i in range(self.parent.GetPageCount()):
> 
> I was asked:
> 
>> Does page count change? i.e. is it necessary to retrieve it in every loop
> 
> 
> Is self.parent.GetPageCount() 'retrieved every loop'?

If your question is 'is self.parent.GetPageCount()' called for each 
iteration of this loop, then the answer is obviously 'no', and it's 
quite easy to check it out:

Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> def test():
...     print "test called"
...     return range(5)
...
 >>> for x in test(): print x
...
test called
0
1
2
3
4
 >>>


Now if you need to use the result of self.parent.GetPageCount() more 
than once in the same function and this result is not likely to change 
during the function's execution, you're certainly better storing it in a 
local variable - but now that's such a CS101 thing that it's probably 
not even worth mentionning.

IOW, Zentrader's remark was at best misleading, at worst plain wrong...


From paul.heslop at blueyonder.co.uk  Wed Aug 22 07:31:39 2007
From: paul.heslop at blueyonder.co.uk (Paul Heslop)
Date: Wed, 22 Aug 2007 11:31:39 GMT
Subject: Free Air Conditioners!!!!!!
References: <1187738115.972271.94080@r23g2000prd.googlegroups.com>
	<OXgBfsH5HHA.1212@TK2MSFTNGP05.phx.gbl>
Message-ID: <46CC1E9B.778915A6@blueyonder.co.uk>

"Scott M." wrote:
> 
> Oh my God!  How did you know?!!  You were so smart to post that here!
> 
about a hundred times at least by now :O(

-- 
Paul  (We won't die of devotion)  
-------------------------------------------------------   
Stop and Look 
http://www.geocities.com/dreamst8me/


From stargaming at gmail.com  Mon Aug  6 08:00:25 2007
From: stargaming at gmail.com (Stargaming)
Date: 06 Aug 2007 12:00:25 GMT
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<46b6df49$0$26165$9b622d9e@news.freenet.de>
	<mailman.1666.1186398842.22759.python-list@python.org>
Message-ID: <46b70d58$0$18070$9b622d9e@news.freenet.de>

On Mon, 06 Aug 2007 11:13:45 +0000, Alex Popescu wrote:

> Stargaming <stargaming at gmail.com> wrote in news:46b6df49$0$26165
> $9b622d9e at news.freenet.de:
> 
[snip]
>> 
>> You're just unluckily shadowing the name `y` in the local scope of
> your
>> function. Your code snippet could be rewritten as::
>> 
>>   def f(x, y=None):
>>     if y is None: my_y = []
>>     else: my_y = y
>>     my_y.append(x)
>>     return my_y
>> 
>> HTH,
>> Stargaming
> 
> For the given example this will continue to print:
> 
>> print f(23)  # prints [23]
>> print f(42)  # prints [42]
> 
> so this doesn't solve/explain OP's initial question. A previous post has
> already clarified the reasons for seeing this normal behavior.
> 
> bests,
> ./alex

If it keeps normal behaviour, that's exactly what it ought to explain. In 
his local scope, there is an `y`, having the value of f.func_defaults. 
Because it's harder to see "hey, in some cases, y vanishes, in some it 
survives", I invented the new local reference `my_y` -- which should be 
clear to go away after completion of the function body.

Regards,
Stargaming


From rainwatching at gmail.com  Sat Aug  4 13:51:36 2007
From: rainwatching at gmail.com (=?iso-8859-1?q?S=F6nmez_Kartal?=)
Date: Sat, 04 Aug 2007 17:51:36 -0000
Subject: regexp problem in Python
In-Reply-To: <1186236610.438810.230580@22g2000hsm.googlegroups.com>
References: <1186177312.117581.129910@d55g2000hsg.googlegroups.com>
	<1186222973.073756.300890@r34g2000hsd.googlegroups.com>
	<1186236610.438810.230580@22g2000hsm.googlegroups.com>
Message-ID: <1186249896.086430.47790@q75g2000hsh.googlegroups.com>

On 4 A ustos, 17:10, Ehsan <ehsan.khod... at gmail.com> wrote:
> On Aug 4, 1:22 pm, S?nmez Kartal <rainwatch... at gmail.com> wrote:
>
>
>
>
>
>
>
> > On 4 A ustos, 00:41, Ehsan <ehsan.khod... at gmail.com> wrote:
>
> > > I want to find "http://www.2shared.com/download/1716611/e2000f22/
> > > Jadeed_Mlak14.wmv?tsid=20070803-164051-9d637d11"  or 3gp instead of
> > > wmv in the text file like this :
> > > <html>
> > > ""some code""
> > > function reportAbuse() {
> > >     var windowname="abuse";
> > >     var url="/abuse.jsp?link=" + "http://www.2shared.com/file/1716611/
> > > e2000f22/Jadeed_Mlak14.html";
> > >     OpenWindow =
> > > window.open(url,windowname,'toolbar=no,scrollbars=no,resizable=no,width=500?,height=500,left=50,top=50');
> > >     OpenWindow.focus();
> > >   }
> > >   function startDownload(){
> > >     window.location = "http://www.2shared.com/download/1716611/
> > > e2000f22/Jadeed_Mlak14.wmv?tsid=20070803-164051-9d637d11";
> > >     //document.downloadForm.submit();
> > >   }
> > >   </script>
> > > </head>
> > > </html>http://www.2shared.com/download/1716611/e2000f22/
> > > Jadeed_Mlak14.3gp?tsid=20070803-164051-9d637d11"sfgsfgsfgv
>
> > > I use this pattern :
> > > "http.*?\.(wmv|3gp).*""
>
> > > but it returns only 'wmv' and '3gp' instead of "http://www.2shared.com/
> > > download/1716611/e2000f22/Jadeed_Mlak14.wmv?
> > > tsid=20070803-164051-9d637d11"
>
> > > what can I do? what's wrong whit this pattern? thanx for your comments
>
> > You could use r'window.location = "(.*?\.(wmv|3gp)";' as your regex
> > string, I guess..- Hide quoted text -
>
> > - Show quoted text -
>
> I didn't get what do you mean? i think i must just change the pattern
> but I don't know how to find bestfit pattern

If you append "window.location = " and ';' to your pattern, it would
be more clear to detect it.

r'window.location = "(.*?)";'

... I have used this and it gave me ...
>>> data = """ <html>
... ""some code""
... function reportAbuse() {
...     var windowname="abuse";
...     var url="/abuse.jsp?link=" + "http://www.2shared.com/file/
1716611/e2000f22/Jadeed_Mlak14.html";
...     OpenWindow =
...
window.open(url,windowname,'toolbar=no,scrollbars=no,resizable=no,width=500,height=500,left=50,top=50');
...     OpenWindow.focus();
...   }
...   function startDownload(){
...     window.location = "http://www.2shared.com/download/1716611/
e2000f22/Jadeed_Mlak14.wmv?tsid=20070803-164051-9d637d11";
...     //document.downloadForm.submit();
...   }
...   </script>
... </head>
... </html>"""
>>> re.findall(r'window.location = "(.*?)";', data)
['http://www.2shared.com/download/1716611/e2000f22/Jadeed_Mlak14.wmv?
tsid=20070803-164051-9d637d11']
>>> print 'It works! :-)'
It works! :-)
>>>

Happy coding



From JYOUNG79 at kc.rr.com  Mon Aug  6 08:36:25 2007
From: JYOUNG79 at kc.rr.com (JYOUNG79 at kc.rr.com)
Date: Mon, 06 Aug 2007 07:36:25 -0500
Subject: xlrd question
Message-ID: <c57f9e4e37d25.37d25c57f9e4e@rdc-kc.rr.com>

Hi Has,

>> (as well as  
>> an alias to it from '/System/Library/Frameworks/Python.framework/
>> Versions/2.3/lib/python2.3/site-packages')

>No, /System.../python2.3/site-packages is a symlink to /Library/Python/
>2.3/site-packages set up by Apple. DistUtils makes no modification to
>anything under /System.

Thanks very much for this clarification (I apologize for not paying closer attention to your 
previous post).

Again, thanks so much for taking the time to help me understand this.  I really appreciate it!  
:-)

Jay


From jeremy at omba.demon.co.uk  Wed Aug 15 07:34:27 2007
From: jeremy at omba.demon.co.uk (Jeremy C B Nicoll)
Date: Wed, 15 Aug 2007 12:34:27 +0100
Subject: What order does info get returned in by os.listdir()
References: <gemini.jms7ay00fafcf00k8@jernic.by.invalid>
Message-ID: <gemini.jmtc5f0021tj002a4@omba.demon.invalid>

Jeremy C B Nicoll <jernic at blueyonder.co.uk> wrote:
 
> When I use os.listdir() to return that list of leaf values, I do seem to
> get them in alphabetical order, A before B before C etc, but the
> ~-prefixed ones are returned after the Z-prefixed files rather than before
> the A-ones.

Thanks to people who replied here, and by email.

I've some supplementary questions... my original code was looking at each
leafname in turn via

  for leaf in os.listdir(path):
      wholefile = os.path.join(path,leaf)
      if os.path.isfile(wholefile):
         if leaf.startswith("~"):

etc.  But I now realise I might alternatively do something like:

  leaflist = os.listdir(path)
  <then something to sort that list>
  for leaf in leaflist:

How would I sort leaflist in a way that mimics the sort order that XP shows
me things under?  



Secondly, my code is wasting time looking at subdirectories/files which I
already know I'm not interested in.  Is there a way to restrict listdir to,
say, only return info about subdirectories, or only about dirs/files whose
names match a pattern?


Thirdly, once I've go a list of leafnames, somehow, is there a way to ask
Python if a specific leaf-value is in that list, without explicitly looping
through the items in the list?

-- 
Jeremy C B Nicoll - my opinions are my own.


From dorjetarap at googlemail.com  Sat Aug 18 14:40:49 2007
From: dorjetarap at googlemail.com (dorje tarap)
Date: Sat, 18 Aug 2007 19:40:49 +0100
Subject: sort dictionary by specific values
Message-ID: <d6a0d8f10708181140p43208d0q199f08159f5c45ff@mail.gmail.com>

Hi,

I need to perform some horrible functions in python I need to do, using sort
in a similar way that Excel can.

With a dictionary like:
 Code: ( text )

   1. >>> d
   2. {8: (99, 99), 9: [(55, 67), (77, 66), (67, 88)], 4: [(45, 78), (56,
   78), (99, 78)], 5: (67, 77)}


I want to sort the entire dictionary based on the last values in each line.
First for [-1][0] and then[-1][0].

So sorted descending I would like the output to look like:
 Code: ( text )

   1. >>> d
   2. {8: (99, 99), 4: [(45, 78), (56, 78), (99, 78)], 9: [(55, 67), (77,
   66), (67, 88)], 5: (67, 77)}


Many thanks
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From lists at liquidtrust.org  Wed Aug 22 16:50:21 2007
From: lists at liquidtrust.org (Charlie)
Date: Wed, 22 Aug 2007 14:50:21 -0600
Subject: MsiLib
Message-ID: <20070822145021.rk1vj9u0ow80o4g0@74.220.202.27>

This doesn't seem to be my day for this. When I add view.Execute() to  
the script, it gives me an error of Execute() takes exactly 1 argument  
(0 given). I can't seem to find anything on the Microsoft page that  
concerns the execute function that states what exactly needs to be  
included as an argument, especially for a select statement. Thanks for  
the help.

Charlie



From cdleary at gmail.com  Thu Aug  2 09:49:42 2007
From: cdleary at gmail.com (cdleary at gmail.com)
Date: Thu, 02 Aug 2007 06:49:42 -0700
Subject: Case study: library class inheritance with property declarations
Message-ID: <1186062582.975223.230270@g12g2000prg.googlegroups.com>

Hi all,

It's possible that I'm missing the obvious -- I've been up for over 24
hours and I'm most likely dehydrated from mass coffee intake, but I
figure many people in similar circumstances will be searching
comp.lang.python one day, so here goes!


class LibraryClass(object):

    """
    A class whose implementation is out of my hands.
    """

    def __init__(self):
        """
        Follows good dynamic-language form and binds all instance
        variables at initialization time.
        """
        # Omitted: complex initialization functionality.
        self.useful_attr = None


class MyInheritedClass(LibraryClass):

    """
    My refinement of the functionality offered by the LibraryClass. I
    now want the instance to initialize with a reference to an
external
    object, and the useful_attr defined in the superclass will now
    reference an attribute of that external object via fget.

    Changing the attribute of the external object has undefined
    behavior, so I want to omit an fset in the property declaration;
    however, I have to provide some way for the superclass to
    initialize useful_attr -- I can't change the superclass' code, as
it
    resides in a library that is out of my hands.
    """

    def __init__(self, external_obj):
        LibraryClass.__init__(self)
        self._external_obj = external_obj

    def get_useful_attr(self):
        return self._external_obj.proxy_useful_attr

    useful_attr = property(fget=get_useful_attr)


def test():
    class _Fake(object):
        pass
    external_obj = _Fake()
    external_obj.proxy_useful_attr = 12
    spam = MyInheritedClass(external_obj)


if __name__ == '__main__':
    test()
EOF


If you're one of those people who doesn't like laboriously reading
contrived examples (elitists ;) I'll boil it down for you: Library
class initializes some attribute, but derived class wants to eliminate
fsets for said attribute. As a result, our ideal solution

Of course, this means that the derived class will raise an error in
some circumstances where the base class wouldn't (when you're setting
that attribute), but one can assume that the inheritance is
worthwhile.

How do I come up with silly solutions to circumvent this? Let me count
the ways...

1. So-and-so: make an fset that does nothing. This ignores (what
should be) errors in code that uses MyInheritedClass in an attempt to
accommodate a useless statement in the base class -- surely non-ideal.
2. The ugly one: since you can probably view the library, copy and
paste the complex initialization functionality in the above, but leave
out the bad statement. This not only forfeits the ideals of
inheritance, but makes you totally incompatible with future library
changes.
3. Cheerleader: Pure evil. On top of the ugliness of 2, you assume
that across library revisions the indenting won't change and that the
troublesome statement will remain on the same line, and pull off one
of these babies:

def super_evil_test():
    from inspect import getsourcelines
    exec(''.join([line[4:] for line in
                  getsourcelines(LibraryClass.__init__)[0][:-1]]))
    LibraryClass.__init__ = __init__
    test() # Passes, but several angels no longer get their wings

Totally kidding, everybody! I hope Guido doesn't read this thread...

And this concludes the sleep deprived rambling that follows the
somewhat interesting case in point. Thoughts?



From luismgz at gmail.com  Sun Aug 26 20:23:27 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M=2E_Gonz=E1lez?=)
Date: Mon, 27 Aug 2007 00:23:27 -0000
Subject: ActiveRecord for Python/MySQL
In-Reply-To: <1188118323.164567.6290@e9g2000prf.googlegroups.com>
References: <1188103880.146814.110780@q4g2000prc.googlegroups.com>
	<far9ul$vb3$1@aioe.org>
	<1188118323.164567.6290@e9g2000prf.googlegroups.com>
Message-ID: <1188174207.530036.117400@r34g2000hsd.googlegroups.com>

On Aug 26, 5:52 am, Devraj <dev... at gmail.com> wrote:
> Thanks
>
> On Aug 26, 5:26 pm, EuGeNe Van den Bulke
>
> <eugene.vandenbu... at gmail.com> wrote:
> > Devraj wrote:
> > > My application uses MySQL as a backend and am using the MySQL/Python
> > > bindings. Are there any libraries that provide a database abstraction
> > > layer like Activerecords for Python?'
>
> > SQLObject
> > SQLAclhemy
> > DejaVu
> > Storm
>
> > Google for Python ORM you may find more!
>
> > EuGeNe --http://www.3kwa.com


If you want an ActiveRecord -like experience with SQLAlchemy, you can
use the extension Elixir on top of it.



From mike.klaas at gmail.com  Fri Aug 31 14:19:46 2007
From: mike.klaas at gmail.com (Klaas)
Date: Fri, 31 Aug 2007 18:19:46 -0000
Subject: platform system may be Windows or Microsoft since Vista
In-Reply-To: <1188578878.264671.296440@k79g2000hse.googlegroups.com>
References: <1188578878.264671.296440@k79g2000hse.googlegroups.com>
Message-ID: <1188584386.174981.168040@z24g2000prh.googlegroups.com>

On Aug 31, 9:47 am, p.lava... at ieee.org wrote:
> Let's suppose you get Python for Vista Windows today fromhttp://www.python.org/download/.
>
> Should you then conclude that the tests:
>
> if platform.system() in ('Windows', 'Microsoft'):
> if not (platform.system() in ('Windows', 'Microsoft')):

Good analysis.  Log a bug @ bugs.python.org

-Mike



From cai.haibin at gmail.com  Wed Aug  1 05:06:42 2007
From: cai.haibin at gmail.com (james_027)
Date: Wed, 01 Aug 2007 09:06:42 -0000
Subject: access the name of my method inside it
Message-ID: <1185959202.302467.276080@x35g2000prf.googlegroups.com>

Hi,

for example I have this method

def my_method():
    # do something

    # how do I get the name of this method which is my_method here?

Thanks,
james



From greg.kujawa at gmail.com  Thu Aug  2 19:45:30 2007
From: greg.kujawa at gmail.com (gregarican)
Date: Thu, 02 Aug 2007 23:45:30 -0000
Subject: i am new to python-Please somebody help
In-Reply-To: <46b249a4$0$31219$426a74cc@news.free.fr>
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com>
	<pan.2007.08.02.12.51.13.363293@REMOVE.THIS.cybersource.com.au>
	<1186063842.827016.95030@q3g2000prf.googlegroups.com>
	<46b249a4$0$31219$426a74cc@news.free.fr>
Message-ID: <1186098330.831148.46010@j4g2000prf.googlegroups.com>

On Aug 2, 11:03 am, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> gregarican a ?crit :
> (snip)
>
> > This link answers my question -->http://www.google.com/search?hl=en&q=Python+list+rudeness.
>
> I seriously don't think that this newsgroup can be qualified as "rude"
> (and I'm possibly one of the "rudest" persons here). Compared to most
> comp.* newsgroup, Python is certainly one of the most tolerant and
> newbie-friendly around - and quite a lot of newcomers say so. FWIW, even
> FAQs, RTFMs or STFWs are usually expressed in a mostly polite way, and
> almost always with links and pointers (and FWIW, it's the case here).
>
> > Honestly, I have developed in both Ruby and Python for years now and
> > have consistently found that the Ruby community if more newbie-
> > friendly than Python's.
>
> I spent sometimes lurking on c.l.ruby and didn't find it *that*
> friendly. Not more than c.l.py at least, and certainly less respectful
> of peoples coming from other languages...
>
> Now if you want some examples of definitively "rude" newsgroups, I
> suggest you take your chance on other newsgroups in the comp.*
> hierarchy...

Good points. I guess I read a little too much into things. Apology
extended. I do recall when I was learning Python most of my questions
weren't crushed or anything. And I hear you about some of the other
comp.* lists. Browsing them awhile back I was left with my jaw open
thinking, "Oh no he diiiiiii....nt."



From software at ginstrom.com  Sun Aug 26 21:05:50 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Mon, 27 Aug 2007 10:05:50 +0900
Subject: Parser Generator?
In-Reply-To: <1188159150.755231.239390@o80g2000hse.googlegroups.com>
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com><1187834836.115735.111160@e9g2000prf.googlegroups.com><qKudneA2bKtKoFLbnZ2dnUVZ_vKunZ2d@comcast.com>
	<1188159150.755231.239390@o80g2000hse.googlegroups.com>
Message-ID: <008201c7e846$691fb970$020ba8c0@MOUSE>

> On Behalf Of Jason Evans
> Parsers typically deal with tokens rather than individual 
> characters, so the scanner that creates the tokens is the 
> main thing that Unicode matters to.  I have written 
> Unicode-aware scanners for use with Parsing-based parsers, 
> with no problems.  This is pretty easy to do, since Python 
> has built-in support for Unicode strings.

The only caveat being that since Chinese and Japanese scripts don't
typically delimit "words" with spaces, I think you'd have to pass the text
through a tokenizer (like ChaSen for Japanese) before using PyParsing.

Regards,
Ryan Ginstrom



From nitro at dr-code.org  Mon Aug  6 09:06:58 2007
From: nitro at dr-code.org (Nitro)
Date: Mon, 06 Aug 2007 15:06:58 +0200
Subject: Scope question
Message-ID: <op.twm2pwhdz3pzfc@nitrogenycs2>

Hello,

today I wrote this piece of code and I am wondering why it does not work  
the way I expect it to work. Here's the code:

y = 0
def func():
     y += 3
func()

This gives an

UnboundLocalError: local variable 'y' referenced before assignment

If I change the function like this:

y = 0
def func():
     print y
func()

then no error is thrown and python apparently knows about 'y'.

I don't understand why the error is thrown in the first place. Can  
somebody explain the rule which is causing the error to me?

-Matthias


From duncan.booth at invalid.invalid  Mon Aug 13 07:47:28 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 13 Aug 2007 11:47:28 GMT
Subject: decorators - more than just syntactic sugar
References: <46be005e$0$13866$ba620e4c@news.skynet.be>
	<5i6f25F3ml00gU5@mid.uni-berlin.de>
Message-ID: <Xns998B821EB21B5duncanbooth@127.0.0.1>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:

> On Sat, 11 Aug 2007 20:30:54 +0200, Helmut Jarausch wrote:
> 
>> are decorators more than just syntactic sugar in python 2.x and what
>> about python 3k ?
> 
> They are just syntactic sugar.
> 
> @spam
> def ham():
>     pass
> 
> is the same as
> 
> def ham():
>     pass
> 
> ham = spam(ham)

Decorators are almost just syntactic sugar, but in fact there is a subtle 
difference between the two bits of code you gave: in the second one you 
assign the function to the name ham and then replace it with the result of 
calling spam. With the decorator syntax you only have one assignment to ham 
and when that decorator is called that assignment has not yet happened.

The difference is small, but you can write decorators which depend on it. 
For example, the code I posted in <Xns998998BD9112Fduncanbooth at 127.0.0.1> 
depends on this difference and will not work if you write the calls out 
explicitly instead of using decorators.




From spam at spam.com  Wed Aug 15 09:03:55 2007
From: spam at spam.com (daz.diamond)
Date: Wed, 15 Aug 2007 13:03:55 GMT
Subject: ming on win32 anyone ? [help a noob]
Message-ID: <%QCwi.14541$rr5.1213@newsfe1-win.ntli.net>

hoping someone can help ...

how do I install ming (with python) on win32? have downloaded the tar.gz 
of ming-0.3.0 which doesn't have a handy self-installer, and I'm 
absolutely foxed as to what to do next ... the install instructions in 
the package seem to be linux oriented, which to me may as well be in greek

any clues much appreciated, thx

daz


From neil.chriss at gmail.com  Sun Aug  5 04:25:28 2007
From: neil.chriss at gmail.com (RichSaneSwindler)
Date: Sun, 05 Aug 2007 08:25:28 -0000
Subject: Pyscripter
Message-ID: <1186302328.706942.242920@q75g2000hsh.googlegroups.com>

I think that pyscripter is the most promising Python IDE around and I
am exciting about its possibilities. However, I find a few issues with
it annoying enough that I don't use it. They seem easily fixed in
which case I think it would be superior to most IDEs. I am wondering
if any users out there would like to add to/debate this list of
benefits and issues (for reference I am using Pyscripter

Pyscripter Benefits:

- very fast, stable GUI (compare this with Wing IDE which is
horrendously slow)
- screen lay it clean and uncluttered
- source completion is lightning fast and I like the option to search
files for selected modules
- source completion searches submodules (as in "os.path.")
- function search, etc.

Pyscripter Issues:

1. smart tabbing:
a. If I place the cursor anywhere in a, hitting the tab should
properly indent the line to (most often) the unique correct place or
(less often) to its best guess as to where to tab. Right now the
editor inserts a tab, which I never want to do.
a  Smart tabbing for multiline expressions (eg expressions broken
within parens) does not work well.

2. there is no source completion for local variables (or at least I
cannot figure out how to use it). This is a major difference between
it and Wing IDE.

3. source completion is easily fooled. If I type "os.path.join(fnam"
and then backspace to "os.path.jo", the completion menu does not come
back up. The same statement goes for the tooltips for functions.

4. lack of emacs key bindings as an option: yes you can add them, but
adding shortcuts is very difficult due to the fact that key bindings
are listed in both the IDE and Editor options section.

5. poor module handling in debugger mode/within the editor. I have not
fully figured out what is going on, but a modules behavior during
debugging or execution within the editor does not fully match behavior
outside of it. E.g., when you run a module in debugger mode its
behavior is not the same as if you run it from the command prompt. I
think that the module is not loaded. To see this, create a module and
type "print __file__" in some function. This will work from the
command prompt but not from the module. If you add "from module-name
import __file__" this solves it, but you should not have to do that.

6. No "Doc String" list. It would be nice if when you put the cursor
over a function a window would display the full docstrings of the
function.

7. The function tool tips (ie what you see when you hover over a
function or open parens) are primitive looking and could show more of
the functions docstrings.
- poor module re-loading. If I import moduleA into moduleB and then
change moduleA, when I debug, the change is not reloaded (as far as I
can tell). This is aggravating.

8. lack of "IPython" like interface in the shell. Would be nice if
emacs keybindings were available.

9. (would be nice) Refactoring capabilities (ala Eclipse's
capabilities, especially for Python)

10. The web page http://pyscripter.googlepages.com/  has a much newer
build than http://mmm-experts.com/Products.aspx?ProductId=4.

I want to emphasize again that despite this lists length I think the
core aspects of the system (speed and stability) are far and away
better than anything else I have used.

Thank you,

Neil Chriss



From tleeuwenburg at gmail.com  Thu Aug 30 17:35:00 2007
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: Thu, 30 Aug 2007 21:35:00 -0000
Subject: Setting a read-only attribute
Message-ID: <1188509700.915517.178440@z24g2000prh.googlegroups.com>

I have an object and wish to set an attribute on it which,
unfortunately for me, is read-only.

How can I go about this?

Cheers.
-T



From pyth0nc0d3r at gmail.com  Fri Aug 24 17:00:35 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Fri, 24 Aug 2007 16:00:35 -0500
Subject: Problem w/ Tkinter
Message-ID: <eb79828c0708241400n7d83028eh5ae4a2dd4c463f06@mail.gmail.com>

How do I add a command to a button say for instance
class MYCLASNAME:
    def choices(self):
        choices = Toplevel()
        v = IntVar()
        a = Radiobutton(choices, text="Add News",
variable=v,value=1).pack(anchor=W)
        b = Radiobutton(choices, text="Edit News",
variable=v,value=2).pack(anchor=W)
        c = Radiobutton(choices, text="Delete News",
variable=v,value=3).pack(anchor=W)
        d = Radiobutton(choices, text="Quit",
variable=v,value=4).pack(anchor=W)
        button = Button(choices, text="Action?",command=self.V
(a,b,c,d)).pack(anchor=W)
        choices.title("What are your actions?")
    def V(self,a,b,c,d):
        if a != "":
            print a
        elif b != "":
            print b
        elif c != "":
            print c
        elif d != "":
            print d
        else:
            print "error";
button = Button(choices, text="Action?",command=self.V(a,b,c,d)).pack(anchor=W)
doesn't even do anything, what can I do to fix this problem?
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From horpner at yahoo.com  Tue Aug  7 13:42:20 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 07 Aug 2007 17:42:20 GMT
Subject: Another question about variable args.
References: <mailman.1719.1186502977.22759.python-list@python.org>
Message-ID: <slrnfbhbtf.268.horpner@FIAD06.norwich.edu>

On 2007-08-07, Steven W. Orr <steveo at syslang.net> wrote:
> I have a structure I need to pack. I call struct.pack about a dozen times 
> and each call takes about 53 arguments.
>
> I create a sequence of the arguments:
> a1 = 1
> a2 = 2
> a3 = 3
> etc...
> a54 = 88
> myseq = (a1, a2, a3, a4 etc... a53)
> Also I made
>
> def mpack ( fmt, *ss ):
>      print type(ss)
>      for ii in ss:
>          print 'ii = ', ii, 'type(ii) = ', type(ii)
>      for ii in list(ss):
>          print 'ii = ', ii, 'type(ii) = ', type(ii)
>      return struct.pack(fmt, *ss )
>
> In my main, this first print statement works.
> print 'main:', mpack(ff, a, b, c, d, e, f, g, h, i)
>
> 1. For the life of me, I can't figure out what to do to get the
> next print to work. The idea is that I want to make my code
> clearer by not passing 50+ args each time and to instead pass a
> sequence which when evaluated will be the desired list of args.
>
> print 'main:', mpack(ff, subseq)
>
> 2. And then, if possible, I'd like to do it in such a way that
> one myseq is defined, its value can automagically be re-eval'd
> so I don't have to re-assign to myseq each time one of the 50+
> variables changes prior to calling pack.

A functor might be a fun solution.

class mpack_maker(object):
  def __init__(self, fmt, *args):
    self.fmt = fmt
    self.arg_list = list(args)
  def __call__(self, slice=None, subseq=None):
    if slice:
      self.arg_list[slice] = subseq
    return struct.pack(self.fmt, *self.arg_list)

You can pass in a slice object and a subsequence to change
arguments (permanently).

>>> mpack = mpack_maker(ff, a, b, c, d, e, f, g, h)
>>> mpack() # Call the function
>>> mpack(slice(5, 7), [0, 7]) # Change args 5 and 6, and call again.

The args you can change are limited by the slicing powers of
Python, and probably combining arg-changing with calling the
function isn't wise, but that's a sketch anyhow.

-- 
Neil Cerutti
We couldn't beat... us.  We couldn't even beat us.  I was trying to think of
somebody bad, and I couldn't think of anybody else.  Us. --Tim Legler


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 10 06:01:12 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 10 Aug 2007 12:01:12 +0200
Subject: Stackless Integration
In-Reply-To: <mailman.1797.1186674791.22759.python-list@python.org>
References: <mailman.1786.1186660119.22759.python-list@python.org>	<46bb1df0$0$403$426a74cc@news.free.fr>
	<mailman.1797.1186674791.22759.python-list@python.org>
Message-ID: <46bc375b$0$406$426a34cc@news.free.fr>

Steve Holden a ?crit :
> Bruno Desthuilliers wrote:
>> Jean-Paul Calderone a ?crit :
>>> On Thu, 09 Aug 2007 09:00:27 -0000, "Justin T." <jmtulloss at gmail.com> 
>>> wrote:
>>>> Hi,
>>>>
>>>> I've been looking at stackless python a little bit, and it's awesome.
>>>> My question is, why hasn't it been integrated into the upstream python
>>>> tree? Does it cause problems with the current C-extensions? It seems
>>>> like if something is fully compatible and better, then it would be
>>>> adopted. However, it hasn't been in what appears to be 7 years of
>>>> existence, so I assume there's a reason.
>>> It's not Pythonic.
>>
>> Hum... Yes ? Really ? Care to argument ?
> 
> Unfortunately such arguments quickly descend to the "yes it is", "no it 
> isn't" level, as there is no objective measure of Pythonicity.

indeed !-)

But that doesn't prevent from honestly trying to explain why one asserts 
such a thing - which Jean-Paul did in another post in this thread.

> Twisted is a complex set of packages

Sure. Now I may be dumb, but I thought it was about stackless, not about 
Twisted...



From fccoelho at gmail.com  Mon Aug  6 10:13:51 2007
From: fccoelho at gmail.com (Flavio)
Date: Mon, 06 Aug 2007 14:13:51 -0000
Subject: boolean operations on sets
Message-ID: <1186409631.147290.323400@22g2000hsm.googlegroups.com>

Hi, I have been playing with set operations lately and came across a
kind of surprising result given that it is not mentioned in the
standard Python tutorial:

with python sets,   intersections  and unions are supposed to be done
like this:
In [7]:set('casa') & set('porca')
Out[7]:set(['a', 'c'])

In [8]:set('casa') | set('porca')
Out[8]:set(['a', 'c', 'o', 'p', 's', 'r'])

and they work correctly. Now what is confusing is that if you do:

In [5]:set('casa') and set('porca')
Out[5]:set(['a', 'p', 'c', 'r', 'o'])

In [6]:set('casa') or set('porca')
Out[6]:set(['a', 'c', 's'])

The results are not what you would expect from an AND  or OR
operation, from the mathematical point of view! aparently the "and"
operation is returning the the second set, and the "or" operation is
returning the first.

If python developers wanted these operations to reflect the
traditional (Python) truth value for data structures: False for empty
data structures and True otherwise, why not return simply True or
False?

So My question is: Why has this been implemented in this way? I can
see this confusing many newbies...



From http  Wed Aug 22 01:33:45 2007
From: http (Paul Rubin)
Date: 21 Aug 2007 22:33:45 -0700
Subject: for statement on empty iterable
References: <1187760507.951994.50310@q4g2000prc.googlegroups.com>
Message-ID: <7xabsk3zgm.fsf@ruckus.brouhaha.com>

james_027 <cai.haibin at gmail.com> writes:
> for i in []:
>  #do something
> is this safe? or should I put a if statement to test it first?

That doesn't crash or anything like that, but it also doesn't
set the index variable, which can cause confusion in some situations.


From annannienann at yahoo.co.uk  Fri Aug 24 05:35:05 2007
From: annannienann at yahoo.co.uk (Peter Sutton)
Date: Fri, 24 Aug 2007 09:35:05 +0000 (GMT)
Subject: Clipboard Monitor (tkinter,windows)
Message-ID: <797532.82583.qm@web27210.mail.ukl.yahoo.com>

Hi. I am an A-level student studying computer science. I have taken it upon myself to learn python. It is now my weapon of choice. I have had a problem trying to creating a clipboard monitor in Windows(XP,Vista) that is linked to a tkinter GUI. I have a perfectly good code for clipboard monitoring, but as soon as it is linked to a tkinter gui, the gui locks when a WM.DRAWCLIPBOARD message is recieved. I am at the point of giving up. If anyone can help or offer an alternative....that is not polling....I would be very happy.  Thanks. Peter

import win32ui, win32clipboard, win32con, win32api, win32gui
from Tkinter import *

def paste():
    win32clipboard.OpenClipboard(0)
    data = win32clipboard.GetClipboardData()
    win32clipboard.CloseClipboard()
    return data


class ClipRecord(object):
    def __init__(self):
        self.gui = Tk()
        self.hPrev = 0
        self.first = True
        self.win = win32ui.CreateFrame()
        self.win.CreateWindow(None,'',win32con.WS_OVERLAPPEDWINDOW)
        self.win.HookMessage(self.OnDrawClipboard,win32con.WM_DRAWCLIPBOARD)
        self.win.HookMessage(self.OnChangeCBChain,win32con.WM_CHANGECBCHAIN)
        self.win.HookMessage(self.OnDestroy,win32con.WM_DESTROY)
        try:
            self.hPrev=win32clipboard.SetClipboardViewer(self.win.GetSafeHwnd())
        except win32api.error, err:
            if win32api.GetLastError () == 0:
                # information that there is no other window in chain
                pass
            else:
                raise
        self.l = Label(self.gui,text="I have losted the will to live")
        self.l.pack()
        self.gui.mainloop()
    def OnChangeCBChain(self, *args):
        msg, wParam, lParam = args[-1][1:4]
        if self.hPrev == wParam:
            # repair the chain
            self.hPrev = lParam
        if self.hPrev:
            # pass the message to the next window in chain
            win32api.SendMessage (self.hPrev, msg, wParam, lParam)

    def OnDrawClipboard(self, *args):
        msg, wParam, lParam = args[-1][1:4]
        if self.first:
            self.first = False
        else:
            self.l["text"] = "Lord be Praised"
            print paste()
        if self.hPrev:
            # pass the message to the next window in chain
            win32api.SendMessage (self.hPrev, msg, wParam, lParam)
    def OnDestroy(self):
        if self.hPrev:
            win32clipboard.ChangeClipboardChain(self.win.GetSafeHwnd(),self.hPrev)
        else:
            win32clipboard.ChangeClipboardChain(self.win.GetSafeHwnd(),0)

if __name__ == "__main__":
    cr = ClipRecord()




      ___________________________________________________________
Yahoo! Answers - Got a question? Someone out there knows the answer. Try it
now.
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From phil at riverbankcomputing.co.uk  Mon Aug 27 16:40:28 2007
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Mon, 27 Aug 2007 21:40:28 +0100
Subject: [PyQt] Help on resizing a custom widget
In-Reply-To: <1188240870.457859.207670@57g2000hsv.googlegroups.com>
References: <1188240870.457859.207670@57g2000hsv.googlegroups.com>
Message-ID: <200708272140.28368.phil@riverbankcomputing.co.uk>

On Monday 27 August 2007, skawaii at gmail.com wrote:
> Ok, here's what's going on. I've just created a custom widget. it
> works great. I'm having some trouble, however, figuring out how to
> allow the said widget to resize. For example, when I throw the widget
> into a new dialog (using Qt Designer), I want to be able to drag it
> larger/smaller and have widget expand/shrink to that size. Right now,
> I can drag the widget bigger/smaller all I want, but it doesn't
> actually change size.
>
> I'm pretty new to PyQt (and therefore, Qt), so I'm pretty sure that
> the answer is a property that needs to be set somewhere. I'm just not
> sure which one. So you know, I'm using Python 2.4.3 and PyQt 3.1.6.
>
> Any help and suggestions would be appreciated. Thanks.

Probably best to start with the following...

http://doc.trolltech.com/4.3.0/layout.html#custom-widgets-in-layouts

Phil


From tim at tdw.net  Fri Aug 24 15:34:45 2007
From: tim at tdw.net (Tim Williams)
Date: Fri, 24 Aug 2007 20:34:45 +0100
Subject: Using Regular Expresions to change .htm to .php in files
In-Reply-To: <46CF1437.9020200@sdf.lonestar.org>
References: <B81995429.43.65370.1@mxextra>
	<9afea2ac0708231305v539390dew84926f0b0dcd6974@mail.gmail.com>
	<46CF1437.9020200@sdf.lonestar.org>
Message-ID: <9afea2ac0708241234u4f13b80an62b6b4b5b1eb33af@mail.gmail.com>

On 24/08/07, J. Cliff Dyer <jcd at sdf.lonestar.org> wrote:
> Tim Williams wrote:
> > On 23/08/07, sebzzz at gmail.com <sebzzz at gmail.com> wrote:
> >
> >> Hi,
> >>
> >> I have a bunch of files that have changed from standard htm files to
> >> php files but all the links inside the site are now broken because
> >> they point to the .htm files while they are now .php files.
> >>
> >> Does anyone have an idea about how to do a simple script that changes
> >> each .htm in a given file to a .php
> >>
> >> Thanks a lot in advance
> >>
> >>
> >
> > Something like:
> >
> > Infile = open(f_name,'r+')
> > Data =  Infile.read()
> > InFile.write(Data.replace('.htm','.php'))
> > Infile.close()
> >
> > :)
> >
> Yeah, but you'd better make darn sure that *all* links point to .htm
> files (including external links), because you could very easily end up
> pointing to http://some.othersite.com/index.phpl
>
> And that's just no good.
>
>


-- 

Tim Williams


From Werner.Merkl at fujitsu-siemens.com  Thu Aug 30 02:42:56 2007
From: Werner.Merkl at fujitsu-siemens.com (Werner)
Date: Wed, 29 Aug 2007 23:42:56 -0700
Subject: self extracting zipefile (windows) and (standard module) zipefile
In-Reply-To: <13dchmplshc2uff@corp.supernews.com>
References: <1188388421.010643.19050@50g2000hsm.googlegroups.com>
	<1188393907.080206.246270@y42g2000hsy.googlegroups.com>
	<13db09i6rrnjc22@corp.supernews.com>
	<13dchmplshc2uff@corp.supernews.com>
Message-ID: <1188456176.512387.177020@w3g2000hsg.googlegroups.com>

On 30 Aug., 06:26, Scott David Daniels <dani... at dsl-only.net> wrote:
> Grant Edwards wrote:
>
> ...
>
> > Another option is to search through the file from the beginning
> > looking for whatever signature matches the beginning of a
> > "normal" zip file.  The self-extracting zipfiles that I've
> > dissected are just an executable image concatenated with a
> > "normal" zipfile.  If you just start searching from the
> > beginning of the file, it's simple to find the actual zip data
> > and copy it into a separate file which then can be unzipped
> > like any other plain zipfile.
>
> Actually, the zip format is defined from the _end_ rather than
> the _beginning_ of the file.  Some random file with a zip file
> concatenated on the end will have the same contents as the zip
> file.  You can even point Python itself at such files and get
> data via:
>      import zipfile
>      zf = zipfile.ZipFile('something.exe')
>      ...
>
> -Scott David Daniels
> Scott.Dani... at Acm.Org

I hoped, this would work, but I got "<class 'zipfile.BadZipfile'>:
File is not a zip file"...
WinZip and 7-ZIP may handle this file, so I take the command line
version of 7-Zip (but I'd prefered a Python only version)

Thanks
Werner



From mail at microcorp.co.za  Thu Aug 23 05:54:01 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 23 Aug 2007 11:54:01 +0200
Subject: Socket recv(1) seems to block instead of returning end of file.
Message-ID: <000901c7e56b$a2c17fc0$03000080@hendrik>


While doing a netstring implementation I noticed that if you
build a record up using socket's recv(1), then when you close
the remote end down, the recv(1) hangs, despite having a short
time out of  0.1 set.

If however, you try to receive more than one char, (I tested with 3,
did not try 2), then when you shut the remote end down you do not
get a time out, but an empty string - the normal end of file, I suppose.

Has anybody else seen this behaviour?

The transmit side seems to give a broken pipe error, which is fine.

I am using stock standard SuSe 10, Python 2.4, out of the box.

- Hendrik




From steve at holdenweb.com  Thu Aug 23 23:34:57 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 23 Aug 2007 23:34:57 -0400
Subject: creating a tar file with python
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE2EE@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
	<faktv8$8fs$1@sea.gmane.org>
	<93066C069973ED448DC2BCEA9C44A7383BE2ED@efmailx>
	<46CE4D3D.7020106@holdenweb.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2EE@efmailx>
Message-ID: <46CE51E1.9020608@holdenweb.com>

Brian McCann wrote:
>  
> <mailto:brian.mccann at viziant.net>
> Steve,
>  
> I ran the code as you suggested, didn't work, tried variations of it 
> didn't work,
> If you don't know the answer don't pretend you do!
> 
> Apology not accepted, please don't wake up!
> 
> Future correspondence on any python questions from you go to trash.
> May your pillow not have pity on your head!
>  
Well in that case it might have been a good idea to post the error 
message you got from trying what I suggested rather than the one you got 
from your fifteenth variation on my (admittedly untested) suggestion.

Not to worry, I know not to try and help you any further.

Sorry my limited Python experience wasn't able to help you solve your 
problem.

[plonk]

regards
  Steve

PS: this reply is *much* more polite than the one that first came to 
mind, which involved making suggestions involving sex and travel. You're 
on your own from here on in. I don't like being incited to spew 
profanity on a list of people I respect.
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From bj_666 at gmx.net  Fri Aug 17 02:19:34 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 17 Aug 2007 06:19:34 GMT
Subject: to property or function in class object
References: <1187317787.848991.242720@i38g2000prf.googlegroups.com>
Message-ID: <5iksvmF3oltfoU1@mid.uni-berlin.de>

On Fri, 17 Aug 2007 02:29:47 +0000, james_027 wrote:

> i am very new to python, not knowing much about good design. I have an
> object here for example a Customer object, where I need to retrieve a
> info which has a number of lines of code to get it.
> 
> my question is weather what approach should I use? to use the property
> which is from the python new class style as I understand or simple use
> function that will return the the info I needed.

I'd say it's a matter of taste here.  Where `get_*` and `set_*` methods
should not be used is getting and setting simple attributes.  Here
properties are very handy if such a simple attribute changes to something
calculated later on, because it is possible to change the class without
the need to change the code that uses such objects.

In the other case, more complex code to get or set some information in
the first place, it is a matter of taste IMHO.  Ask yourself if the user
would expect `balance` to be an attribute of that class.  If it seems to
be "natural" to have such an attribute.  And usually attribute access does
not trigger really heavy computation.  Constructing the answer from some
different attributes or doing a conversion before returning something is
okay, but a calculation that lasts an hour or so would surprise many.

Ciao,
	Marc 'BlackJack' Rintsch


From david at asdf.asdf  Thu Aug 30 21:03:31 2007
From: david at asdf.asdf (bambam)
Date: Fri, 31 Aug 2007 11:03:31 +1000
Subject: beginner, idomatic python 2
References: <13csjmeaoqh9le3@corp.supernews.com>
	<1187927388.173203.298660@e9g2000prf.googlegroups.com>
	<13d4jfjfogbvq6f@corp.supernews.com>
Message-ID: <13deq74b634tb07@corp.supernews.com>

Thank you.

I'm glad to see that I don't need to choose between two
opposing viewpoints :~)

Steve. 




From stefan.behnel-n05pAM at web.de  Wed Aug  1 16:37:17 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 01 Aug 2007 22:37:17 +0200
Subject: force unicode strings
In-Reply-To: <5hbmjcF3gtt39U1@mid.individual.net>
References: <5hbmjcF3gtt39U1@mid.individual.net>
Message-ID: <46B0EEFD.1090709@web.de>

Thomas Guettler wrote:
> is it possible to force all non ascii strings to be unicode strings
> somehow?
> 
> Sometimes I forget that I need to write u'...' if the string contains
> an umlaut. I get an exception in django later. But since the
> exception does not show the string it is hard to find it.

I guess you can't afford to wait for Python 3, can you?

http://www.python.org/dev/peps/pep-3100/#atomic-types

Stefan


From jstroud at mbi.ucla.edu  Thu Aug  9 20:27:36 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 09 Aug 2007 17:27:36 -0700
Subject: Importing to
Message-ID: <f9gbdo$n1$1@daisy.noc.ucla.edu>

Many thanks to the numerous helpful comments by Paul Rubin, Carsten 
Haese and others in the thread "How to pass a reference to the current 
module".

After digesting these comments, I came up with this way to circumvent 
the problem of attempting to reference modules that import other modules 
  in said imported modules (executed in main):


   # branches ==> dictionary of dictionaries (actually a ConfigObj)
   for (name, branch) in branches.items():
     modname = branch.get('__module__', None)
     if modname is None:
       namespace = globals()
     else:
       namespace = __import__(modname).globals()
     fname = branch.get('__function__', name)
     function = namespace[fname]
     # etc.


I'm wondering if this approach seems problematic to anyone.

Thanks again for all of the help I've received.

James


-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From simon at brunningonline.net  Tue Aug 21 13:24:22 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Tue, 21 Aug 2007 18:24:22 +0100
Subject: Retrieving a variable's name.
In-Reply-To: <1187658202.236626.93600@50g2000hsm.googlegroups.com>
References: <1187658202.236626.93600@50g2000hsm.googlegroups.com>
Message-ID: <8c7f10c60708211024j5e5765bal4ee915df7539879a@mail.gmail.com>

On 8/21/07, rodrigo <rodrigo.cr at gmail.com> wrote:
> How would I go about retrieving a variable's name (not its value)?

http://effbot.org/pyfaq/how-can-my-code-discover-the-name-of-an-object.htm

-- 
Cheers,
Simon B.
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/
GTalk: simon.brunning | MSN: small_values | Yahoo: smallvalues


From miki.tebeka at gmail.com  Fri Aug 31 13:33:43 2007
From: miki.tebeka at gmail.com (Miki)
Date: Fri, 31 Aug 2007 17:33:43 -0000
Subject: Is there a simple way to exit a while loop on keystroke?
In-Reply-To: <1188578827.809840.90100@r29g2000hsg.googlegroups.com>
References: <1188578827.809840.90100@r29g2000hsg.googlegroups.com>
Message-ID: <1188581623.588967.78050@z24g2000prh.googlegroups.com>

Hello,
> I am new to python, and have written a simple program to read a port
> via telnet.  I would like it to run until any key is pressed.  Of
> course I wouldn't mind requiring a specific keystroke in the future,
> but I would think this is simpler for now.
>
> I have used kbhit() and getch() many times in C, but I can't find
> anything similar in  Python.  I am using Linux also, so the msvcrt
> code isn't an option.  I have tried sys.stdin.read(), but that hangs
> UNTIL a key is pressed.
You might want to look at http://docs.python.org/lib/module-curses.html

Another solution is to ask the user to hit CTRL-C
from time import sleep

try:
    while 1:
        print "BEEP"
        sleep(1)
except KeyboardInterrupt:
    print "BYE BYE"

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



From bj_666 at gmx.net  Wed Aug 22 03:39:37 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 Aug 2007 07:39:37 GMT
Subject: creating a dictionary from a dictionary with regex
References: <1187766820.785959.170190@r23g2000prd.googlegroups.com>
Message-ID: <5j27hpF3sh73oU1@mid.uni-berlin.de>

On Wed, 22 Aug 2007 07:13:40 +0000, james_027 wrote:

> I am trying to create a dictionary from a dictionary which the help of
> regex to identify which keys to select. I have something like this but
> I feel its long and not the fastest solution ... could someone
> contribute?
> 
> import re
> 
> d= {'line2.qty':2, 'line3.qty':1, 'line5.qty':12, 'line2.item':'5c-BL
> Battery', 'line3.item':'N73', 'line5.item':'Screen Cover'}
> 
> collected = [k[:5] for k in d if re.match('^line\d+\.qty',k)]
> 
> for i in collected:
>     d2 = {}
>     for k in d:
>         if re.match('^%s\.\D+' % i, k):
>             d2[k] = d[k]
>     print d2

You are iterating over `d` for every item in `collected`.  With another
`dict` to store the results you can iterate over `d` only once:

from collections import defaultdict

def main():
    d= {'line2.qty':2, 'line3.qty':1, 'line5.qty':12,
        'line2.item':'5c-BL Battery', 'line3.item':'N73',
        'line5.item':'Screen Cover'}
    
    result = defaultdict(dict)
    for key, value in d.iteritems():
        new_key = key.split('.', 1)[0]  # Get the 'line#' part.
        result[new_key][key] = value
    print result

Ciao,
	Marc 'BlackJack' Rintsch


From carsten at uniqsys.com  Fri Aug  3 14:16:59 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 03 Aug 2007 14:16:59 -0400
Subject: Global package variable, is it possible?
In-Reply-To: <46b36b31$0$10622$4fafbaef@reader2.news.tin.it>
References: <1186160415.065108.139160@e9g2000prf.googlegroups.com>
	<46b36b31$0$10622$4fafbaef@reader2.news.tin.it>
Message-ID: <1186165019.3382.42.camel@dot.uniqsys.com>

On Fri, 2007-08-03 at 17:51 +0000, Fabio Z Tessitore wrote:
> Heve you tried to do something like:
> 
> # module configure.py
> value1 = 10
> value2 = 20
> ...
> 
> 
> # other module
> from configure import *
> 
> # now I'm able to use value1 value2 etc.
> var = value1 * value2

Right idea, wrong execution. Note that the OP said "I'd like to be able
to reload the config file dynamically and have all my modules
automatically receive the new config."

"from configure import *" will import the settings into the current
namespace, and subsequent changes in the original namespace will, in
general, not have any effect in the current namespace.

This should do the trick:

# module configure.py
value1 = 10
value2 = 20
...

# other module
import configure

var = configure.value1 * configure.value2

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From steve at holdenweb.com  Tue Aug  7 03:21:37 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Aug 2007 03:21:37 -0400
Subject: parsing a dbIII file
In-Reply-To: <1186469710.277542.246430@w3g2000hsg.googlegroups.com>
References: <1186469710.277542.246430@w3g2000hsg.googlegroups.com>
Message-ID: <f996i1$io0$1@sea.gmane.org>

korovev76 at gmail.com wrote:
> Hello everybody, I'm new to python (...I work with cobol...)
> 
> I have to parse a file (that is a dbIII file) whose stucture look like
> this:
> |string|, |string|, |string that may contain commas inside|, 1, 2, 3, |
> other string|
> 
> Is there anything in python that parses this stuff?
> 
> 
> thanks a lot
> korovev
> 
That's not a standard dBaseIII data file though, correct? It looks more 
like something that was produced *from* a dBaseIII file.

If the format is similar to Excel's CSV format then the csv module from 
Python's standard library may well be what you want. Otherwise there are 
parsers at all levels - one called PyParsing is quite popular, and I am 
sure other readers will have their own suggestions.

I am not sure whether the pipe bars actually appear in your data file, 
so it is difficult to know quite exactly what to suggest, but I would 
play with the file in an interactive interpreter session first to see 
whether csv can do the job.

Good luck with your escape from COBOL!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From greg at cosc.canterbury.ac.nz  Fri Aug 10 05:28:39 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Fri, 10 Aug 2007 21:28:39 +1200
Subject: is there anybody using __del__ correctly??
In-Reply-To: <1186731369.073644.158490@z24g2000prh.googlegroups.com>
References: <1186731369.073644.158490@z24g2000prh.googlegroups.com>
Message-ID: <5i2plfF3mlqtnU1@mid.individual.net>

Michele Simionato wrote:
> So I did, and to my dismay 95% of the __del__ methods in the standard
> library are just calling a close method!

You can't conclude that this is wrong just from
looking at the __del__ method itself. You need to
consider whether there is any way the thing being
closed could be referenced from somewhere else.

If that's so, the __del__ method may be performing
a useful service by closing it more promptly than
it would otherwise be.

--
Greg


From google at mrabarnett.plus.com  Fri Aug 31 14:58:45 2007
From: google at mrabarnett.plus.com (MRAB)
Date: Fri, 31 Aug 2007 11:58:45 -0700
Subject: strings (dollar.cents) into floats
In-Reply-To: <46d84a47$0$1346$834e42db@reader.greatnowhere.com>
References: <mailman.140.1188483282.28954.python-list@python.org>
	<877incd20i.fsf@benfinney.id.au>
	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
	<1188575044.874256.42960@50g2000hsm.googlegroups.com>
	<fb9eas$tnc$1@sea.gmane.org>
	<mailman.218.1188577696.28954.python-list@python.org>
	<46d84a47$0$1346$834e42db@reader.greatnowhere.com>
Message-ID: <1188586725.667740.255700@o80g2000hse.googlegroups.com>

On Aug 31, 5:39 pm, David H Wild <dhw... at talktalk.net> wrote:
> In article <mailman.218.1188577696.28954.python-l... at python.org>,
>    Chris Mellon <arka... at gmail.com> wrote:
>
> > I believe that to the degree that "real" accounting was done in those
> > currencies it did in fact use non-decimal bases. Just as people don't
> > use decimal time values (except us crazy computer folk), you're write
> > 1 pound 4 shillings, not 1.333... pounds.
>
> When I worked on the British Railways National Payroll system, about 35
> years ago, we, in common with many large users, wrote our system to deal
> with integer amounts of pennies, and converted to pounds, shillings and
> pence in the output part of the system.
>
So you never handled halfpennies?



From ptmcg at austin.rr.com  Fri Aug 24 20:51:16 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Fri, 24 Aug 2007 17:51:16 -0700
Subject: Parser Generator?
In-Reply-To: <_6mdnZxbdNKTVFrbnZ2dnUVZ_tqtnZ2d@comcast.com>
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
	<_6mdnZxbdNKTVFrbnZ2dnUVZ_tqtnZ2d@comcast.com>
Message-ID: <1188003076.702532.241950@q3g2000prf.googlegroups.com>

On Aug 18, 11:37 pm, "Jack" <nos... at invalid.com> wrote:
> Thanks for all the replies!
>
> SPARK looks promising. Its doc doesn't say if it handles unicode
> (CJK in particular) encoding though.
>
> Yapps also looks powerful:http://theory.stanford.edu/~amitp/yapps/
>
> There's also PyGgyhttp://lava.net/~newsham/pyggy/
>
> I may also give Antlr a try.
>
> If anyone has experiences using any of the parser generators with CJK
> languages, I'd be very interested in hearing that.
>
> Jack
>
> "Jack" <nos... at invalid.com> wrote in message
>
> news:abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d at comcast.com...
>
>
>
> > Hi all, I need to do syntax parsing of simple naturual languages,
> > for example, "weather of London" or "what is the time", simple
> > things like these, with Unicode support in the syntax.
>
> > In Java, there are JavaCC, Antlr, etc. I wonder what people use
> > in Python? Antlr also has Python support but I'm not sure how good
> > it is. Comments/hints are welcome.- Hide quoted text -
>
> - Show quoted text -

Jack -

Pyparsing was already mentioned once on this thread.  Here is an
application using pyparsing that parses Chinese characters to convert
to English Python.

http://pypi.python.org/pypi/zhpy/0.5

-- Paul



From multiseed at gmail.com  Tue Aug 21 17:21:57 2007
From: multiseed at gmail.com (Shiao)
Date: Tue, 21 Aug 2007 21:21:57 -0000
Subject: Logging module gives duplicate log entries
In-Reply-To: <mailman.61.1187702909.32294.python-list@python.org>
References: <1187702248.203917.188570@k79g2000hse.googlegroups.com>
	<mailman.61.1187702909.32294.python-list@python.org>
Message-ID: <1187731317.661324.244870@k79g2000hse.googlegroups.com>


>
> You need to remove the handler from the logging object
>
> # remove the handler once you are done
> applog.removeHandler(hdl)
>
> Cheers,
> amit.
>

I'm not sure how this could help.



From wollez at gmx.net  Fri Aug 10 05:00:25 2007
From: wollez at gmx.net (WolfgangZ)
Date: Fri, 10 Aug 2007 11:00:25 +0200
Subject: subprocess.Popen(cmd) question
Message-ID: <f9h9fa$3i8$1@sea.gmane.org>

Hello,

I'm starting some subprocesses inside a loop. The processes run 
independent and dont need any communication between each other. Due to 
memory issues I need to limit the number of running processes to around 
10. How can I insert a break into my loop to wait until some processes 
are finished?

Some minimal examplecode:

import subprocess
for i in range(0,100):
     cmd='ping localhost'
     p=subprocess.Popen(cmd)
     p.wait()

Thanks for any ideas.

Wolfgang



From kj7ny at nakore.com  Wed Aug  8 03:16:24 2007
From: kj7ny at nakore.com (kj7ny)
Date: Wed, 08 Aug 2007 00:16:24 -0700
Subject: How can I programmatically find the name of a method from within
	that method?
In-Reply-To: <mailman.1727.1186549847.22759.python-list@python.org>
References: <1186548312.672360.259100@q3g2000prf.googlegroups.com>
	<mailman.1727.1186549847.22759.python-list@python.org>
Message-ID: <1186557384.845276.151630@i13g2000prf.googlegroups.com>

On Aug 7, 10:09 pm, Jay Loden <pyt... at jayloden.com> wrote:
> kj7ny wrote:
> > Is there a way that I can programmatically find the name of a method I
> > have created from within that method?  I would like to be able to log
> > a message from within that method (def) and I would like to include
> > the name of the method from which it was written without having to
> > hard-code that value in every message string.  While we're at it, is
> > there a way to programmatically get the name of the class and the
> > module while I'm at it?
>
> This is a frequently asked question around here :-)
>
> You should search the list archives for past threads, e.g:http://aspn.activestate.com/ASPN/Mail/Message/python-list/3542665
>
> -Jay

Thanks for the link.  I had actually searched the past threads, but
apparently didn't enter the right search criteria because I did not
find that thread.  Or, that thread isn't findable by searching Google
groups?

I tried the example in the interpreter and it appears to work.
Despite my years and years of programming in python, I am a bit
baffled by the example though.  What is @checkPrivs (see example
copied below from other post)?  In fact... how does the thing work at
all?

------------------------------------------
def checkPrivs(fn):
    fnName = fn.func_name
    def restricted(*args):
        print "about to call function", fnName
        if fnName in listOfAllowedFunctions:
            return fn(*args)
        else:
            raise KeyError("you don't have sufficient privileges to do
THAT")
    return restricted

listOfAllowedFunctions = ['add','subtract']

@checkPrivs
def add(a,b):
    return a+b

@checkPrivs
def subtract(a,b):
    return a-b

@checkPrivs
def multiply(a,b):
    return a*b

add(1,2)
subtract(4,1)
multiply(3,2)



From kyosohma at gmail.com  Thu Aug 23 16:09:52 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 23 Aug 2007 13:09:52 -0700
Subject: Newbie: List file system roots
In-Reply-To: <VfmdnUadeYEpeVDb4p2dnAA@telenor.com>
References: <VfmdnUadeYEpeVDb4p2dnAA@telenor.com>
Message-ID: <1187899792.259346.136640@r23g2000prd.googlegroups.com>

On Aug 23, 2:48 pm, "Einar W. H?st" <eina... at notreal.com> wrote:
> Hi,
>
> How would you list the file system roots in Python? That is, I'm looking
> for a way to list all connected drives (C:, D: etc) on a Windows box, or
> all /root, /tmp etc on a *nix box. In Java, there's a built-in API
> function to do this, File.listRoots(), but I couldn't find any
> equivalents in the Python libraries.
>
> Kind regards,
> Einar

Looks like the win32 modules save the day again.

http://mail.python.org/pipermail/python-win32/2004-January/001562.html

from win32com.client import Dispatch
fso = Dispatch('scripting.filesystemobject')
for i in fso.Drives :
    print i

# Mike



From koje_je_ono_bilo_pitanje at bla.bla  Tue Aug 28 16:11:29 2007
From: koje_je_ono_bilo_pitanje at bla.bla (Boris Ozegovic)
Date: Tue, 28 Aug 2007 22:11:29 +0200
Subject: localhost, ?!
References: <fb1id4$kpp$1@localhost.localdomain>
	<5jjbpfF3sm4m7U2@mid.individual.net>
Message-ID: <fb1vh2$lqg$1@localhost.localdomain>

Bjoern Schliessmann wrote:

> Definitely a problem with the web server (503 means "service
> unavailable").

I did try on two servers, Apache and simple python server.  There was
identically error on both servers.
  
>> Anybody have slightest clue wthat is going on?  :-/
> 
> Try using wireshark or a similar tool to see what's going on on
> protocol level.

Ok.


From gagsl-py2 at yahoo.com.ar  Mon Aug 20 16:18:00 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Aug 2007 13:18:00 -0700
Subject: urllib2.urlopen(url) pulling something other than HTML
In-Reply-To: <1187635452.841155.88720@a39g2000hsc.googlegroups.com>
References: <1187635452.841155.88720@a39g2000hsc.googlegroups.com>
Message-ID: <1187641080.516885.122350@g4g2000hsf.googlegroups.com>

On 20 ago, 15:44, "dogatemycompu... at gmail.com"
<dogatemycompu... at gmail.com> wrote:

> ----------------------------------------------------------
> f = formatter.AbstractFormatter(formatter.DumbWriter(StringIO()))
> parser = htmllib.HTMLParser(f)
>     parser.feed(html)
>     parser.close()
>     return parser.anchorlist
> ----------------------------------------------------------

The htmllib.HTMLParser class is hard to use. I would replace those
lines with:

from HTMLParser import HTMLParser

class MyHTMLParser(HTMLParser):
    def __init__(self):
        HTMLParser.__init__(self)
        self.anchorlist = []

    def handle_starttag(self, tag, attrs):
        if tag=="a":
            href = dict(attrs).get("href")
            if href:
                self.anchorlist.append(href)

parser = MyHTMLParser()
parser.feed(htmltext)
print parser.anchorlist

The anchorlist attribute, defined by myself here, is a list containing
all href attributes found in the page.
See <http://docs.python.org/lib/module-HTMLParser.html>

> I get the idea that we're allocating some memory that looks like a
> file so formatter.dumbwriter can manipulate it.  The results are
> passed to formatter.abstractformatter which does something else to the
> HTML code.  The results are then passed to "f" which is then passed to
> htmllib.HTMLParser so it can parse the html for links.   I guess I
> don't understand with any great detail as to why this is happening.
> I know someone is going to say that I should RTFM so here is the gist
> of the documentation:

Don't even try to understand it - it's a mess. Use the HTMLParser
module instead.

> The last question is..   I can't find any documentation to explain
> where the "anchorlist" attribute came from?   Here is the only
> reference to this attribute that I can find anywhere in the Python
> documentation.

And that's all you will find.

> So ..  How does an average developer figure out that parser returns a
> list of hyperlinks in an attribute called anchorlist?  Is this

Usually, those attributes are hyperlinked and you can find them in the
documentation index. Not for this one :(

> something that you just "figure out" or is there some book I should be
> reading that documents all of the attributes for a particular
> method?   It just seems a bit obscure and certainly not something I
> would have figured out on my own.  Does this make me a poor developer
> who should find another hobby?   I just need to know if there is
> something wrong with me or if this is a reasonable question to ask.

It's a very reasonable question. The attribute should be documented
properly. But the class itself is a bit old; I don't never use it
anymore.

> The last question I have is about debugging.   The spider is capable
> of parsing links until it reaches:
>
> "html = get_page(http://www.google.com/jobs/fortune)" which returns
> the contents of a pdf document, assigns the pdf contents to html which
> is later passed to parser.feed(html) which crashes.

You can verify the Content-Type header before processing. Quoting the
get_page method:

> def get_page(url, log):
>     """Retrieve URL and return comments, log errors."""
>     try:
>         page = urllib2.urlopen(url)
>     except urllib2.URLError:
>         log("Error retrieving: " + url)
>         return ''
>     body = page.read()
>     page.close()
>     return body

>From <http://docs.python.org/lib/module-urllib2.html>, the urlopen
method returns a file-like object, which has an additional info()
method holding the response headers. You can get the Content-Type
using page.info().gettype(), which should be text/html or text/xhtml.
For any other type, just return '' as you do for any error.

--
Gabriel Genellina



From horpner at yahoo.com  Sat Aug  4 10:32:39 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Sat, 04 Aug 2007 14:32:39 GMT
Subject: the one python book
References: <mailman.1611.1186233912.22759.python-list@python.org>
Message-ID: <b60ti.37345$G23.30474@newsreading01.news.tds.net>

On 2007-08-04, dhr <dima.hristov at gmail.com> wrote:
> newbie question:
>
> Is there a 'K&R" type of Python book? The book that you'd
> better have on your shelf if you are going into Python? 

C is such a small language that the same slim volume can be both
a great tutorial and an awesome language reference.

With Python, you won't find anything like that. Python is too
huge.

So get used to the idea of needing several books. ;)

-- 
Neil Cerutti


From __peter__ at web.de  Fri Aug 10 04:12:02 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 10 Aug 2007 10:12:02 +0200
Subject: float to string with different precision
References: <1186731617.128913.279360@m37g2000prh.googlegroups.com>
Message-ID: <f9h6kj$sj6$00$1@news.t-online.com>

 zunbeltz at gmail.com wrote:

> I have to print float numbers to a file. Each float should be 5
> characters in width (4 numbers and the decimal point).
> My problem is that I do not now how to specify float to have different
> numbers of decimals. For example
> 
> 5.32 -> 5.320
> 10.356634 -> 10.357
> 289.234 -> 289.2
> 
> In the string formating operations only fixed number of decimal digits
> is allow.

>>> ["%#.4g" % f for f in [5.32, 10.356634, 289.234, 123456789.]]
['5.320', '10.36', '289.2', '1.235e+08']

Found by playing around with format strings, so no guarantees.

Peter


From gagsl-py2 at yahoo.com.ar  Wed Aug 22 10:58:24 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 22 Aug 2007 07:58:24 -0700
Subject: subprocess (spawned by os.system) inherits open TCP/UDP/IP port
In-Reply-To: <1187742603.908139.311350@j4g2000prf.googlegroups.com>
References: <OuidnfFc6OjhKD3bnZ2dnUVZ_oimnZ2d@comcast.com>
	<mailman.928.1184946783.22759.python-list@python.org>
	<1187742603.908139.311350@j4g2000prf.googlegroups.com>
Message-ID: <1187794704.599878.229850@j4g2000prf.googlegroups.com>

On 21 ago, 21:30, Seun Osewa <seun.os... at gmail.com> wrote:

> Is it possible to cause this sort of thing to happen on Windows.
> Specifically, I'm looking for a way to cause multiple processes to
> accept new connections on a bound socket.  on UNIX, I can just fork()
> after binding the server socket to a port and the children can
> accept() on that same socket, but on Windows, I don't know how to make
> that work. Any ideas?  Thanks!

Sockets are inherited by default, at least on any more-or-less-recent
Windows version (that is, not on Win9x). There is a specific Winsock
function (WSADuplicateSocket) and you can use the generic
DuplicateHandle too with bInheritHandle=TRUE.
Read about this on Microsoft site <http://msdn2.microsoft.com/en-us/
library/ms683463.aspx>

Note: Better to post a NEW message instead of replying to this old
thread.

--
Gabriel Genellina



From david at asdf.asdf  Thu Aug 30 21:19:15 2007
From: david at asdf.asdf (bambam)
Date: Fri, 31 Aug 2007 11:19:15 +1000
Subject: beginner, idomatic python 2
References: <13csjmeaoqh9le3@corp.supernews.com>
	<1187927388.173203.298660@e9g2000prf.googlegroups.com>
	<13d4jfjfogbvq6f@corp.supernews.com>
	<46d2ba7a$0$430$426a74cc@news.free.fr>
Message-ID: <13der4jquo987d1@corp.supernews.com>


"Bruno Desthuilliers" <bruno.42.desthuilliers at wtf.websiteburo.oops.com> 
wrote in message news:46d2ba7a$0$430$426a74cc at news.free.fr...
>
> As a side note, in Python, inheritance ...
> ... should usually not be used for typing.

:~(
I'm sorry, I don't even know what that means... The code I
have inherited from someone only a little more knowledgeable
than me, and is still full of development artifacts anyway.

The Pwr and Psp classes inherit from the Device class not
neccessarily because that is a Good Thing, more because
the development process led to them being thought of that
way. All devices have a mixture of common and differing
attributes.

What is 'typing'?

Steve. 




From dale at riverhall.nospam.co.uk  Wed Aug  1 06:56:22 2007
From: dale at riverhall.nospam.co.uk (Dale Strickland-Clark)
Date: Wed, 01 Aug 2007 11:56:22 +0100
Subject: MIMEText breaking the rules?
Message-ID: <rFZri.84932$ml1.74260@fe16.usenetserver.com>

The email module's mimetext handling isn't what you might expect from
something that appears to behave like a dictionary.

$ python
Python 2.5 (r25:51908, May 25 2007, 16:14:04)
[GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from email.mime.text import MIMEText
>>> msg = MIMEText("A message")
>>> msg["To"] = "recipient at myhost.com"
>>> msg["To"] = "other_recipient at myhost.com"
>>> print msg.as_string()
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
To: recipient at myhost.com
To: other_recipient at myhost.com

A message
>>>

Having apparently REPLACED my recipient, what I've ended up with is both of
them.

-- 
Dale Strickland-Clark
Riverhall Systems - www.riverhall.co.uk 



From ptmcg at austin.rr.com  Sun Aug 26 23:26:32 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sun, 26 Aug 2007 20:26:32 -0700
Subject: Parser Generator?
In-Reply-To: <mailman.11.1188176757.28954.python-list@python.org>
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
	<1188159150.755231.239390@o80g2000hse.googlegroups.com>
	<mailman.11.1188176757.28954.python-list@python.org>
Message-ID: <1188185192.735485.237740@57g2000hsv.googlegroups.com>

On Aug 26, 8:05 pm, "Ryan Ginstrom" <softw... at ginstrom.com> wrote:
> > On Behalf Of Jason Evans
> > Parsers typically deal with tokens rather than individual
> > characters, so the scanner that creates the tokens is the
> > main thing that Unicode matters to.  I have written
> > Unicode-aware scanners for use with Parsing-based parsers,
> > with no problems.  This is pretty easy to do, since Python
> > has built-in support for Unicode strings.
>
> The only caveat being that since Chinese and Japanese scripts don't
> typically delimit "words" with spaces, I think you'd have to pass the text
> through a tokenizer (like ChaSen for Japanese) before using PyParsing.
>
> Regards,
> Ryan Ginstrom

Did you think pyparsing is so mundane as to require spaces between
tokens?  Pyparsing has been doing this type of token-recognition since
Day 1.  Looking for tokens without delimiting spaces was one of the
first applications for pyparsing.  This issue is not unique to Chinese
or Japanese text.  Pyparsing will easily find the tokens in this
string:

y=a*x**2+b*x+c

as

['y','=','a','*','x','**','2','+','b','*','x','+','c']

even though there is not a single delimiting space.  But pyparsing
will also render this as a nested parse tree, reflecting the
precedence of operations:

['y', '=', [['a', '*', ['x', '**', 2]], '+',['b', '*', 'x'], '+',
'c']]

and will allow you to access individual tokens by field name:
- lhs: y
- rhs: [['a', '*', ['x', '**', 2]], '+', ['b', '*', 'x'], '+', 'c']

Please feel free to look through the posted examples on the pyparsing
wiki at http://pyparsing.wikispaces.com/Examples, or some of the
applications currently using pyparsing at http://pyparsing.wikispaces.com/WhosUsingPyparsing,
and you might get a better feel for what kind of tasks pyparsing is
capable of.

-- Paul



From david at asdf.asdf  Sun Aug 26 23:18:14 2007
From: david at asdf.asdf (bambam)
Date: Mon, 27 Aug 2007 13:18:14 +1000
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com><1187898049.734696.9500@l22g2000prc.googlegroups.com><13csoronscqp7d2@corp.supernews.com><1188090322.663217.102750@22g2000hsm.googlegroups.com><13d4bucfm4m1lc4@corp.supernews.com>
	<mailman.13.1188182594.28954.python-list@python.org>
Message-ID: <13d4gjm3qq0lt7c@corp.supernews.com>

Thank you, I have been through the tutorial several times, I guess
I'm just not smart enough. Perhaps I have been led astray by what
I read here?

My code started like this:

for i in range(self.parent.GetPageCount()):

I was asked:

>Does page count change? i.e. is it necessary to retrieve it in every loop


Is self.parent.GetPageCount() 'retrieved every loop'?

Steve.




"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message 
news:mailman.13.1188182594.28954.python-list at python.org...
> En Sun, 26 Aug 2007 22:58:35 -0300, bambam <david at asdf.asdf> escribi?:
>
>> Ok, many environments are capable of cached evaluation
>> of functions without variable parameters so
>>     range(5)
>> is cached, but
>>     range(v) is re-evaluated every time. Is this defined
>> behaviour?
>
> The range builtin function returns a list, and lists are mutable objects, 
> so it must return a *different* list each time.
>
>> That is, is it defined what Python does for
>>     for i in f()
>> I'm sure it must be, but I haven't seen it yet. If I have
>> a user defined function returning a range, is it defined
>> that the range function is called on every loop? If I
>> have a function returning a range taking a parameter,
>>     for i in f(v)
>> is it defined that the variable is evaluated for every loop?
>
> Find all the (mostly negative) answers yourself in 
> <http://docs.python.org/ref/for.html>
>
> -- 
> Gabriel Genellina
> 




From DustanGroups at gmail.com  Tue Aug 28 07:24:44 2007
From: DustanGroups at gmail.com (Dustan)
Date: Tue, 28 Aug 2007 11:24:44 -0000
Subject: Let's Unite Against Jews and Mongrels!
In-Reply-To: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
References: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
Message-ID: <1188300284.507909.126770@57g2000hsv.googlegroups.com>

On Aug 27, 2:13 am, Nenad Milicevic - The Aryan Serb
<i_hate_j... at shiftmail.com> wrote:
> Let's break the chains of Jewish and black domination!

A) Why?
B) What chains?



From mensanator at aol.com  Sun Aug  5 13:40:56 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sun, 05 Aug 2007 10:40:56 -0700
Subject: Formatting Results so that They Can be Nicely Imported into a
	Spreadsheet.
In-Reply-To: <1186304814.129279.207100@j4g2000prf.googlegroups.com>
References: <1186270555.514649.311280@d30g2000prg.googlegroups.com>
	<1186278638.931477.39760@z24g2000prh.googlegroups.com>
	<Avati.40$Tu1.6@newsfe12.lga>
	<1186284359.668342.5880@d30g2000prg.googlegroups.com>
	<1186304814.129279.207100@j4g2000prf.googlegroups.com>
Message-ID: <1186335656.977681.284240@z24g2000prh.googlegroups.com>

On Aug 5, 4:06?am, SMERSH009 <SMERSH0... at gmail.com> wrote:
> On Aug 4, 8:25 pm, "mensana... at aol.com" <mensana... at aol.com> wrote:
>
>
>
>
>
> > On Aug 4, 9:21?pm, "Jim Langston" <tazmas... at rocketmail.com> wrote:
>
> > > <mensana... at aol.com> wrote in message
>
> > >news:1186278638.931477.39760 at z24g2000prh.googlegroups.com...
>
> > > > On Aug 4, 6:35?pm, SMERSH009 <SMERSH0... at gmail.com> wrote:
> > > >> Hi All.
> > > >> Let's say I have some badly formatted text called doc:
>
> > > >> doc=
> > > >> """
> > > >> friendid
> > > >> Female
>
> > > >>                             23 years old
>
> > > >>                             Los Gatos
>
> > > >>                             United States
> > > >> friendid
> > > >> Male
>
> > > >>                             24 years old
>
> > > >>                             San Francisco, California
>
> > > >>                             United States
> > > >> """
>
> > > >> How would I get these results to be displayed in a format similar to:
> > > >> friendid;Female;23 years old;Los Gatos;United States
> > > >> friendid;Male; 24 years old;San Francisco, California;United States
>
> > > >> The latter is a lot easier to organize and can be quickly imported
> > > >> into Excel's column format.
>
> > > >> Thanks Much,
> > > >> Sam
>
> > > > d = doc.split('\n')
>
> > > > f = [i.split() for i in d if i]
>
> > > > g = [' '.join(i) for i in f]
>
> > > > rec = []
> > > > temprec = []
> > > > for i in g:
> > > >    if i:
> > > >        if i == 'friendid':
> > > >            rec.append(temprec)
> > > >            temprec = [i]
> > > >        else:
> > > >            temprec.append(i)
> > > > rec.append(temprec)
>
> > > > output = [';'.join(i) for i in rec if i]
>
> > > > for i in output: print i
>
> > > > ##    friendid;Female;23 years old;Los Gatos;United States
> > > > ##    friendid;Male;24 years old;San Francisco, California;United States
>
> > > also, I would suggest you use CSV format.
>
> > Well, the OP asked for a specific format. One is not
> > always at liberty to change it.
>
> > > CSV stands for "Comma Seperated
> > > Variable" and Excel can load such a sheet directly.
>
> > And Excel can load the shown format directly also,
> > just specify the delimiter.
>
> > > Instead of seperating using ; seperate using ,  Of course, this provides a
> > > problem when there is a , in a string.
>
> > Which explains the popularity of using tabs as delimiters.
> > The data deliverable specification I use at work
> > uses the pipe character | which never appears as data
> > in this particular application.
>
> > > Resolution is to quote the string.
>
> > Which makes the file bigger and isn't necessary
> > when tabs and pipes are used as delimiters.
>
> > > Being such, you can just go ahead and quote all strings.  So you would want
> > > the output to be:
>
> > > "friendid","Female","23 years old","Los Gatos","United States"
> > > "friendid","Male","24 years old","San Francisco, California","United States"
>
> > Which I would do if I had a specification that
> > demanded it or was making files for others. For my
> > own use, I wouldn't bother as it's unnecessary work.
>
> > > Numbers should not be quoted if you wish to treat them as numeric and not
> > > text.
>
> > A good reason not to use quotes at all. Besides which,
> > Excel can handle that also.
>
> Thanks for all your posts guys.
> mensanator's was the most helpful, and I only ended up needing to use
> a few lines from that code.
> The only question that remains for me--and this is just for my
> knowledge-- what does the "if i" mean in this code snippet?
> f = [i.split() for i in d if i]

d is a list of strings, some of which are empty (caused
by the previous split). "if i" evaluates False for
an empty string, so that particular i will not get
split and ends up ommitted from f.

> How is it helpful to leave a dangling "if i"? Why not just f =
> [i.split() for i in d]?

Compare the result of having "if i":
[[], ['friendid'], ['Female'], ['23', 'years', 'old'], ['Los',
'Gatos'], ['United', 'States'], ['friendid'], ['Male'], ['24',
'years', 'old'], ['San', 'Francisco,', 'California'], ['United',
'States']]

to not having it:
>>> ff = [i.split() for i in d]
>>> ff
[[], ['friendid'], ['Female'], [], [], ['23', 'years', 'old'], [], [],
['Los', 'Gatos'], [], [], ['United', 'States'], ['friendid'],
['Male'], [], [], ['24', 'years', 'old'], [], [], ['San',
'Francisco,', 'California'], [], [], ['United', 'States'], []]

All the blank lines became empty lists which actually
wouldn't change anything if they get joined. But that
won't always be the case. Knowing how to use conditionals
in list comprehensions is worth knowing.

Even with the "if i" included, we end up with an
empty list at the start. This because the first "blank"
line wasn't blank, it was a space, so it passes the
"if i" test.

>
> And yes John, this was indeed a "homework question." It was for my
> daughter's preschool. You are going to help her ace her beginner
> Python class! (No, this was not a homework question).



From gtcopeland at gmail.com  Tue Aug 21 21:01:09 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: Tue, 21 Aug 2007 18:01:09 -0700
Subject: Fast socket write
Message-ID: <1187744469.240933.149610@r23g2000prd.googlegroups.com>

I'm having a brain cramp right now.  I can't see to recall the name of
a module.  I know there is a python module which allows for optimized
socket writes on Linux.  It uses a syscall to obtain its benefit.
IIRC, it is a fast path for I/O bound servers.

Can someone please refresh my memory?  What is the name of this
module??

Help,

Greg



From deets at nospam.web.de  Thu Aug  2 15:16:04 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 02 Aug 2007 21:16:04 +0200
Subject: python 3.0, pywin32 and scipy
In-Reply-To: <1186070475.659511.24130@q3g2000prf.googlegroups.com>
References: <1186070475.659511.24130@q3g2000prf.googlegroups.com>
Message-ID: <5heos0F3jael1U1@mid.uni-berlin.de>

vml schrieb:
> Hello,
> 
> 
> I am trying to promote python in my job, my collegue only see matlab
> and microsoft scripting language.
> I understood that there willl be no backward compatibility between
> python 2.x and 3.0, does it means that:
> 
> - my script using pywin32 for the COM layer and scipy for the maths
> won't work under 3.0

If the win32-extensions are made available (which I think is to be 
expected - they are too important to not being ported), I fail to see 
what COM-dependend code you expect to fail - after all, it's the 
COM-based APIs that are to be questioned there.

> - will we have the equivalent of pywin32 and scipy in python ?

Again, I think so - but of course I don't know for sure. But they both 
are to important.

> I will be incharge of designing a python module which will be a
> 'matrix calculator' in our current software. Will it be compatible
> with python 3.0 ? I guess no.

Even if not - why do you care? Is your C# 1 code being ported to C# 2 
immediately? Are you preparing for C# three?

> What can I answer to my collegue who will say 'Python is changing and
> the stuff you are doing now is useless'?
> 
> how can I argue against matlab and c# ?

You mean C#, the language that has seen 3 major revisions in the last 6 
years of existence, with C# 3 being announced already? And the .NET SDK, 
that happily strode along with that? Compared to python, that has been 
started in 1991 and now approaches it's third incarnation, I'd say 
python has a record of steadiness that surpasses that of MS-based tools 
by any means.

Diez


From ladaan at iptel.org  Wed Aug  8 11:50:39 2007
From: ladaan at iptel.org (Ladislav Andel)
Date: Wed, 08 Aug 2007 17:50:39 +0200
Subject: twisted - locking threads when deferToThread is used
In-Reply-To: <4866bea60708080710ma83a713p622c2997df812a6a@mail.gmail.com>
References: <46B99CCB.1070304@iptel.org>	<4866bea60708080709v797c5a67w158f6f988ef5c304@mail.gmail.com>
	<4866bea60708080710ma83a713p622c2997df812a6a@mail.gmail.com>
Message-ID: <46B9E64F.5010702@iptel.org>

Chris Mellon wrote:
> On 8/8/07, Chris Mellon <arkanes at gmail.com> wrote:
>   
>> On 8/8/07, Ladislav Andel <ladaan at iptel.org> wrote:
>>     
>>> Hi,
>>> I'm writing an application which will be periodically testing servers.
>>> I will have a global list of these servers(domain names) and need to do
>>> few tasks.
>>> 1) DNS checks - I will use asynchronous twisted-names for it
>>> - in case there is a difference comparing to the list it should update
>>> the list(then also in DB)
>>> 2) ICMP pings - should be also possible to do it asynchronously
>>> 3) Blocking function which will be pinging with SIP requests
>>> - here I will use function deferToThread to make it non-blocking.
>>>
>>> Questions:
>>> 1) How do I lock each thread when writing to a global list in twisted?
>>> 2) How will I put together all three results mentioned above in the
>>> global list
>>> - is it by using function callLater ?
>>> 3) Could you help me with a rough skeleton of this application, please?
>>>
>>> Thank you,
>>> Lada
>>>
>>>       
>> deferToThread returns the result of the passed function in a Deferred.
>> Callbacks and errbacks will be run in the main event loop, so you
>> don't need to worry about thread safety of the callbacks, just of the
>> function itself.
>>
>> The basic model would look something like this:
>>
>> def querySIP(what):
>>     return sip.query(what) #native, *threadsafe*, blocking call
>>
>> sipquery = reactor.deferToThread(querySIP, what)
>> sipquery.addCallback(lambda result: sip_results.append(result))
>> sipquery.addErrback(log.err)
>>
>>     
>
>
> And, of course, deferToThread is a function in the
> twisted.internet.threads module, not a method of the reactor.
>   
Thanks for your answer.

I have following code below.
There are few problems.

1) I need to call getServerResponse of SIP servers for given list 
domains periodically.
     I have tried to use callLater method but probably at wrong places.

2)
In my code is somthing wrong.
I get the response but also following error

Traceback (most recent call last):
  File 
"/home/data/iptel_summer_2007/sipcraft1/src/sipcraft/multideferred.py", 
line 46, in ?
    reactor.run()
  File "/usr/lib/python2.4/site-packages/twisted/internet/posixbase.py", 
line 220, in run
    self.mainLoop()
  File "/usr/lib/python2.4/site-packages/twisted/internet/posixbase.py", 
line 228, in mainLoop
    self.runUntilCurrent()
--- <exception caught here> ---
  File "/usr/lib/python2.4/site-packages/twisted/internet/base.py", line 
533, in runUntilCurrent
    f(*a, **kw)
  File "/usr/lib/python2.4/site-packages/twisted/internet/defer.py", 
line 239, in callback
    self._startRunCallbacks(result)
  File "/usr/lib/python2.4/site-packages/twisted/internet/defer.py", 
line 290, in _startRunCallbacks
    raise AlreadyCalledError
twisted.internet.defer.AlreadyCalledError:




From nospam at nospam.com  Fri Aug 10 00:45:04 2007
From: nospam at nospam.com (Mark T)
Date: Thu, 9 Aug 2007 21:45:04 -0700
Subject: Threaded Design Question
References: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
Message-ID: <oMGdnd2xodjScCbbnZ2dnUVZ_uydnZ2d@comcast.com>


<half.italian at gmail.com> wrote in message 
news:1186683909.797328.68770 at i13g2000prf.googlegroups.com...
> Hi all!  I'm implementing one of my first multithreaded apps, and have
> gotten to a point where I think I'm going off track from a standard
> idiom.  Wondering if anyone can point me in the right direction.
>
> The script will run as a daemon and watch a given directory for new
> files.  Once it determines that a file has finished moving into the
> watch folder, it will kick off a process on one of the files.  Several
> of these could be running at any given time up to a max number of
> threads.
>
> Here's how I have it designed so far.  The main thread starts a
> Watch(threading.Thread) class that loops and searches a directory for
> files.  It has been passed a Queue.Queue() object (watch_queue), and
> as it finds new files in the watch folder, it adds the file name to
> the queue.
>
> The main thread then grabs an item off the watch_queue, and kicks off
> processing on that file using another class Worker(threading.thread).
>
> My problem is with communicating between the threads as to which files
> are currently processing, or are already present in the watch_queue so
> that the Watch thread does not continuously add unneeded files to the
> watch_queue to be processed.  For example...Watch() finds a file to be
> processed and adds it to the queue.  The main thread sees the file on
> the queue and pops it off and begins processing.  Now the file has
> been removed from the watch_queue, and Watch() thread has no way of
> knowing that the other Worker() thread is processing it, and shouldn't
> pick it up again.  So it will see the file as new and add it to the
> queue again.  PS.. The file is deleted from the watch folder after it
> has finished processing, so that's how i'll know which files to
> process in the long term.
>
> I made definite progress by creating two queues...watch_queue and
> processing_queue, and then used lists within the classes to store the
> state of which files are processing/watched.
>
> I think I could pull it off, but it has got very confusing quickly,
> trying to keep each thread's list and the queue always in sync with
> one another.  The easiset solution I can see is if my threads could
> read an item from the queue without removing it from the queue and
> only remove it when I tell it to.  Then the Watch() thread could then
> just follow what items are on the watch_queue to know what files to
> add, and then the Worker() thread could intentionally remove the item
> from the watch_queue once it has finished processing it.
>
> Now that I'm writing this out, I see a solution by over-riding or
> wrapping Queue.Queue().get() to give me the behavior I mention above.
>
> I've noticed .join() and .task_done(), but I'm not sure of how to use
> them properly.  Any suggestions would be greatly appreciated.
>
> ~Sean
>

Just rename the file.  We've used that technique in a similar application at 
my work for years where a service looks for files of a particular extension 
to appear in a directory.  When the service sees a file, in renames it to a 
different extension and spins off a thread to process the contents.

-Mark T. 



From sean at buildingonline.com  Fri Aug 31 10:52:48 2007
From: sean at buildingonline.com (sberry)
Date: Fri, 31 Aug 2007 07:52:48 -0700
Subject: Question involving a Python app...
Message-ID: <1188571968.529938.55770@i38g2000prf.googlegroups.com>

I am a Flash developer (also a Python dev) and I use an editor called
SEPY Actionscript Editor.  The latest release version does not support
Flash CS3, so I downloaded the source from subversion, edited it, and
recompiled to get a version that worked with CS3.  Right now, in order
to run the program I have to do a command line "python main.pyw."

The question now is this:
Others in my company would like to use the version I have compiled
without installing Python, wxPython, 4suite, antlr, and a whole bunch
of other Python libs.  So, how do I create an executable (on Windows)
to install the program so it will run without the aforementioned
framework being installed?

I know this isn't really an entirely "Pythonic" question, but this
group has always been very helpful in the past.

Thanks



From ed at leafe.com  Fri Aug 24 11:33:12 2007
From: ed at leafe.com (Ed Leafe)
Date: Fri, 24 Aug 2007 11:33:12 -0400
Subject: creating a tar file with python
In-Reply-To: <1187969070.3385.20.camel@dot.uniqsys.com>
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
	<faktv8$8fs$1@sea.gmane.org>
	<93066C069973ED448DC2BCEA9C44A7383BE2ED@efmailx>
	<46CE4D3D.7020106@holdenweb.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2EE@efmailx>
	<1187969070.3385.20.camel@dot.uniqsys.com>
Message-ID: <0A8A92C4-3F3A-42C4-A6F5-770C5ADFB6E5@leafe.com>

On Aug 24, 2007, at 11:24 AM, Carsten Haese wrote:

> You clearly have no idea who you're talking to. I suggest you  
> Google for
> '"Steve Holden" Python' to get a clue. Good luck finding any more help
> here.

	Even if it were Joe Nobody to whom he was directing those comments,  
it was *way* out of line. The fact that it was Steve only reinforces  
the cluelessness of the writer.

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com




From kyosohma at gmail.com  Thu Aug  2 09:38:39 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 02 Aug 2007 13:38:39 -0000
Subject: Python end of file marker similar to perl's __END__
In-Reply-To: <slrnfb3ljb.pg.horpner@FIAD06.norwich.edu>
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
	<1185976656.753817.27980@x40g2000prg.googlegroups.com>
	<slrnfb17m5.224.horpner@FIAD06.norwich.edu>
	<eml6o4-tvd.ln1@lairds.us>
	<qv2si.37263$G23.1227@newsreading01.news.tds.net>
	<f8s750$b0m$1@wake.carmen.se>
	<slrnfb3ljb.pg.horpner@FIAD06.norwich.edu>
Message-ID: <1186061919.007689.197670@g12g2000prg.googlegroups.com>

On Aug 2, 8:08 am, Neil Cerutti <horp... at yahoo.com> wrote:
> On 2007-08-02, Magnus Lycka <ly... at carmen.se> wrote:
>
>
>
> > Neil Cerutti wrote:
> >> On 2007-08-01, Cameron Laird <cla... at lairds.us> wrote:     .
> >>> I want to re-emphasize the "triple-quote it" tip mentioned
> >>> earlier in this thread.  I think the original questioner
> >>> will find this quite satisfying, if I understand his situ-
> >>> ation at all.
>
> >>> *I* certainly have source code with embedded "junk"
> >>> commented out as multi-line strings.
>
> >> I used to do that, but now that I use doctests so much it's
> >> infeasible to comment out arbitrary code that way, since they
> >> can't necessarily nest.
>
> > If you consistently use e.g. ''' for doc strings, you can use
> > """ to comment out code blocks.
>
> But then I couldn't use """ in my docstrings! ;) Actually, I
> wound up converting all my multiline doctests to use
> concatenation instead, since they were ruining my syntax
> highlighting performance in Vim.
>
> --
> Neil Cerutti
> We shall reach greater and greater platitudes of achievement. --Richard J.
> Daley

Python comes with an IDE that can do bulk commenting or uncommenting.
It's IDLE. Just select the test to comment out and press ALT+3. To
uncomment, press ALT+4.

It's cool!

Mike



From mbrown at phys.ksu.edu  Wed Aug 22 17:59:09 2007
From: mbrown at phys.ksu.edu (yagyala)
Date: Wed, 22 Aug 2007 14:59:09 -0700
Subject: introspection and functions
Message-ID: <1187819949.515982.15450@r23g2000prd.googlegroups.com>

Hi. I would like to be able to tell, at run time, how many parameters
a function requires. Ideally I would like to be able to tell which are
optional as well. I've tried looking at the functions attributes, but
haven't found one that helps in this. How can I do this?

Thanks



From michele.simionato at gmail.com  Sun Aug 12 01:04:44 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Sat, 11 Aug 2007 22:04:44 -0700
Subject: is there anybody using __del__ correctly??
In-Reply-To: <SradnX_-hI91BiHbnZ2dnUVZ_r6rnZ2d@comcast.com>
References: <1186731369.073644.158490@z24g2000prh.googlegroups.com>
	<1186762908.121319.35900@x35g2000prf.googlegroups.com>
	<SradnX_-hI91BiHbnZ2dnUVZ_r6rnZ2d@comcast.com>
Message-ID: <1186895084.388293.295330@57g2000hsv.googlegroups.com>

On Aug 10, 7:09 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> There were also a few recipes posted during this discussion that wrap
> weakrefs up a bit nicer so it's easier to use them in place of __del__:
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/519635

I knew about your recipe and I thought it was clever, *very*
clever. I have been thinking about it a bit more today and
here is an alternative, which does not require metaclasses,
does not require descriptors, and does not require the user to
declare the attributes she will use in the __finalize__ method.
Warning: it is no more tested than the test case in your recipe:

import weakref

_get = object.__getattribute__
_set = object.__setattr__
_del = object.__delattr__

def getinnerobj(self):
    return _get(self, '*innerobj*')

class Impostor(object):
    "It tries very hard to impersonate the inner object"
    def __init__(self, obj):
        _set(self, '*innerobj*', obj)
    def __getattribute__(self, name):
        return getattr(getinnerobj(self), name)
    def __setattr__(self, name, value):
        _set(getinnerobj(self), name, value)
    def __delattr__(self, name):
        _del(getinnerobj(self), name)

_refset = set()

class Finalized(object):
    def __new__(cls, *args, **kw):
        self = super(Finalized, cls).__new__(cls, *args, **kw)
        self.__init__(*args, **kw)
        def finalize(ref, refset=_refset):
            refset.remove(ref)
            cls.__finalize__(self)
        fake = Impostor(self)
        _refset.add(weakref.ref(fake, finalize))
        return fake
    def __finalize__(self):
        pass

Hope you will enjoy it,

       Michele Simionato



From XX.XmcX at XX.XmclaveauX.com  Fri Aug 31 15:32:40 2007
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Fri, 31 Aug 2007 21:32:40 +0200
Subject: JavaScript
References: <1188574962.185775.274420@d55g2000hsg.googlegroups.com>
Message-ID: <mn.fd0c7d786b5d9c62.46195@XX.XmclaveauX.com>

Hi!

I know "how to", but only with IE on windows.

-- 
@-salutations

Michel Claveau




From jcd at sdf.lonestar.org  Fri Aug 24 14:51:28 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 24 Aug 2007 14:51:28 -0400
Subject: Using Regular Expresions to change .htm to .php in files
In-Reply-To: <424c8c5b0708241102q19fc19cape28c1e434994ebd5@mail.gmail.com>
References: <B81995429.43.65370.1@mxextra>	
	<9afea2ac0708231305v539390dew84926f0b0dcd6974@mail.gmail.com>	
	<46CF1437.9020200@sdf.lonestar.org>
	<424c8c5b0708241102q19fc19cape28c1e434994ebd5@mail.gmail.com>
Message-ID: <46CF28B0.10009@sdf.lonestar.org>

I'd actually skip checking where the links are coming from, and just 
pretend any link could be .htm or .html.

Check for both cases, either using a regex  or just fix the .html cases 
first.  So do 2 passes.

Pass 1: Data.replace('.html', '.php')
Pass 2: Data.replace('.htm','.php')

I make no claims about what the surrounding code should look like.  
You've gotten a number of responses on that already.

Cheers,
Cliff

S?bastien N wrote:
> It's a fact, but still I went on with the solution that overwrites all
> the .htm because it's a really big site and about 70-80% of the links
> are internal so we'll save time this way.
>
> There's probably a way to analyse if a link is internal or external,
> but I needed something fast. But still, I would be interested about
> knowing how to do such a thing for the future.
>
> On 8/24/07, J. Cliff Dyer <jcd at sdf.lonestar.org> wrote:
>   
>>  Tim Williams wrote:
>>  On 23/08/07, sebzzz at gmail.com <sebzzz at gmail.com> wrote:
>>
>>
>>  Hi,
>>
>> I have a bunch of files that have changed from standard htm files to
>> php files but all the links inside the site are now broken because
>> they point to the .htm files while they are now .php files.
>>
>> Does anyone have an idea about how to do a simple script that changes
>> each .htm in a given file to a .php
>>
>> Thanks a lot in advance
>>
>>
>>  Something like:
>>
>> Infile = open(f_name,'r+')
>> Data = Infile.read()
>> InFile.write(Data.replace('.htm','.php'))
>> Infile.close()
>>
>> :)
>>
>>  Yeah, but you'd better make darn sure that *all* links point to .htm files
>> (including external links), because you could very easily end up pointing to
>> http://some.othersite.com/index.phpl
>>
>>  And that's just no good.
>>
>>
>>     
>
>
>   

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From stanc at al.com.au  Mon Aug 13 06:01:30 2007
From: stanc at al.com.au (Astan Chee)
Date: Mon, 13 Aug 2007 20:01:30 +1000
Subject: check if var is dict
Message-ID: <46C02BFA.10703@al.com.au>

Hi,
I have a variable, I want to check if it is a dictionary or a string.
Is there any better way to do this than I've done. How I did it is by 
doing a .items() and catching a AttributeError that it raises if its not 
a dictionary.
How do i properly do it?
Thanks
Astan


From aleax at mac.com  Mon Aug 27 00:56:19 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 26 Aug 2007 21:56:19 -0700
Subject: ANN: SCF released GPL
References: <2qnAi.21495$eY.19028@newssvr13.news.prodigy.net>
Message-ID: <1i3h3ki.1poi7cm865i17N%aleax@mac.com>

hg <hg at nospam.org> wrote:
   ...
> I am looking for a free subversion server resource to put the code ...
> if you know of any.

Check out code.google.com -- it has a hosting service for open source
code, too, these days (and it IS subversion).


Alex


From newsgroups at debain.org  Sun Aug 19 09:08:35 2007
From: newsgroups at debain.org (Samuel)
Date: Sun, 19 Aug 2007 13:08:35 +0000 (UTC)
Subject: Hot subject: a good python editor and/or IDE?
References: <mailman.2162.1187525764.22759.python-list@python.org>
Message-ID: <fa9fcj$rq9$1@tamarack.fernuni-hagen.de>

On Sun, 19 Aug 2007 11:47:03 +0200, S?bastien wrote:

> Hi folks,
> 
> I am currently using Eclipse+PyDev when developping Python projects but
> I lack a fast, simple editor for tiny bit of scripts. So here is my
> question: what is, for you, the current best ( but still kind of light!
> ) Python editor/IDE ? A tiny precision, I am on Ubuntu so I am looking
> for a linux compatible editor.

Vim with SnippetsEMU works great with Python. I made a demo of this in
action here:

http://debain.org/?p=198

Installation/configuration example on Ubuntu:

---------------
$ sudo apt-get install vim

$ mkdir -p $HOME/.vim/ftplugin/

$ mkdir -p $HOME/.vim/after/ftplugin/

$ wget http://www.vim.org/scripts/download_script.php?src_id=6951 -O se.vba

$ vim se.vba
:so %
:wq

$ echo "setlocal sw=4
setlocal ts=4
noremap <buffer> <LocalLeader>py o/**************<CR><CR>/<Esc>
" >> ~/.vim/ftplugin/python.vim

$ wget http://code.google.com/p/snippetsemu/issues/attachment?aid=-6063627743376712928&name=python_snippets.vim

$ cp python_snippets.vim $HOME/.vim/after/ftplugin/

$ echo "syntax on 
set sw=2
set ts=2
set nu 
set nuw=3
set autoindent
set expandtab" >> $HOME/.vimrc
---------------

(not tested, but it should work)

-Samuel


From jzgoda at o2.usun.pl  Thu Aug  2 15:25:49 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Thu, 02 Aug 2007 21:25:49 +0200
Subject: Determining if file is valid image file
In-Reply-To: <1186065645.879720.27720@q75g2000hsh.googlegroups.com>
References: <1186064098.587590.91210@g4g2000hsf.googlegroups.com>
	<1186064275.652416.250540@d55g2000hsg.googlegroups.com>
	<f8sqb8$1t6$1@nemesis.news.tpi.pl>
	<1186065645.879720.27720@q75g2000hsh.googlegroups.com>
Message-ID: <f8tbd6$rnh$1@nemesis.news.tpi.pl>

Andr? napisa?(a):

>>>> Other than installing PIL, is there a "simple" way using Python only
>>>> to determine if a file is a valid image file?
>>>> I'd be happy if I could at least identify valid images files for gif,
>>>> jpeg and png.   Pointers to existing modules or examples would be
>>>> appreciated.
>>>> The reason why I'd prefer not using PIL is that I'd like to bundle
>>>> such a function/module in my app.
>>>> Andr?
>>> I should have added: I'm interesting in validating the file *content*
>>> - not the filename :-)
>> Is the module imghdr enough for your needs?
> 
> Yes, thanks.

Be aware that broken images (i.e. partially downloaded) in many cases
pass the imghdr.what() test. This function checks for patterns in files,
just like "file" utility.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From steve at holdenweb.com  Tue Aug  7 02:35:59 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Aug 2007 02:35:59 -0400
Subject: Relative-importing *
In-Reply-To: <5hqhb9F3ldifeU2@mid.uni-berlin.de>
References: <1185559874.299008.167010@x40g2000prg.googlegroups.com>	<871weth2gg.fsf@benfinney.id.au>	<pan.2007.07.28.06.17.39.399342@REMOVE.THIS.cybersource.com.au>	<46ae3894$0$19609$426a34cc@news.free.fr>	<1186200218.666444.254200@q3g2000prf.googlegroups.com>	<87vebv9yrr.fsf@benfinney.id.au>	<1186363732.188847.48070@q3g2000prf.googlegroups.com>	<87zm15870h.fsf@benfinney.id.au>	<1186454723.425679.220510@q3g2000prf.googlegroups.com>
	<5hqhb9F3ldifeU2@mid.uni-berlin.de>
Message-ID: <f993se$bi4$1@sea.gmane.org>

Marc 'BlackJack' Rintsch wrote:
> On Tue, 07 Aug 2007 02:45:23 +0000, rbygscrsepda wrote:
> 
>> Specifically, in Python 1.5, all of the following generate the error
>> below:
> 
> In Python *1.5*!?  I somehow doubt that.  ;-)
> 
>>     from . import *
>>     from .sibiling_package import *
>>     from .. import *
>>     from ..cousin_package import *
>>
>>     SyntaxError: 'import *' not allowed with 'from .'
>>
>> Importing * is a feature, but this seems like an artificial
>> inconsistency to me. It's as if the compiler raises an error when it
>> tries to import * as soon as it sees "from .", regardless of what
>> comes after it. So is this a bug in python? And if it happens to be a
>> bug, how can I alert the developers of the python compiler?
> 
> I'm just guessing here but as * imports are considered bad style the
> developers might took the opportunity to forbid them in relative imports
> because relative imports are new and this doesn't break old programs.
> 
Yup, I searched around to find a specific statement of the reason but 
couldn't find anything definite. Of course, if you are writing a set of 
plugins then wildcard imports would seem like a train wreck waiting to 
happen in terms of the discipline required to avoid name collisions.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From DustanGroups at gmail.com  Sat Aug 25 15:05:07 2007
From: DustanGroups at gmail.com (Dustan)
Date: Sat, 25 Aug 2007 19:05:07 -0000
Subject: accessing keys in dict
In-Reply-To: <fap7sk$tr0$2@lust.ihug.co.nz>
References: <1187143106.021325.104690@l22g2000prc.googlegroups.com>
	<fap7sk$tr0$2@lust.ihug.co.nz>
Message-ID: <1188068707.273263.200450@x35g2000prf.googlegroups.com>

On Aug 25, 7:41 am, Lawrence D'Oliveiro <l... at geek-
central.gen.new_zealand> wrote:
> In message <1187143106.021325.104... at l22g2000prc.googlegroups.com>,
>
> james_027 wrote:
> > is there any difference between ..
>
> > for key in a_dict:
>
> > from
>
> > for key in a_dict.keys():
>
> I'm assuming the former is equivalent to
>
>     for key in a_dict.iterkeys() :

Never assume. A better approach would be to experiment:


>>> a_dict = {'name':'apple', 'color':'red', 'texture':'smooth',
'shape':'sphere'}
>>> for i in a_dict: print i
color
shape
name
texture
>>> for i in a_dict.iterkeys(): print i
color
shape
name
texture
>>> for i in a_dict.itervalues(): print i
red
sphere
apple
smooth
>>> for i in a_dict.iteritems(): print i
('color', 'red')
('shape', 'sphere')
('name', 'apple')
('texture', 'smooth')



From exarkun at divmod.com  Thu Aug 23 13:31:05 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 23 Aug 2007 13:31:05 -0400
Subject: My 'time' module is broken, unsure of cause
In-Reply-To: <200708231122.55588.bulliver@badcomputer.org>
Message-ID: <20070823173105.8162.615504421.divmod.quotient.1142@ohm>

On Thu, 23 Aug 2007 11:22:55 -0600, darren kirby <bulliver at badcomputer.org> wrote:
>Hi all,
>
>I have a strange error here and I am unsure how to further investigate it:
>
>Python 2.4.4 (#1, Aug 23 2007, 10:51:29)
>[GCC 4.1.2 (Gentoo 4.1.2)] on linux2
>Type "help", "copyright", "credits" or "license" for more information.
>>>> import time
>40:42:0
>>>> now = time.time()
>Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
>AttributeError: 'module' object has no attribute 'time'
>
>Notice the '40:42:0' that always gets output. I searched Gentoo's bugzilla but
>can not see anything relevant. I rebuilt python but the behavior recurs. I am
>unsure if the issue is with Python, Gentoo, or perhaps with the underlying
>lib (presumably glibc) that Python uses for the time module. This is working
>fine on another machine (also 2.4.4, GCC 3.4.6,  Gentoo Hardened).

    exarkun at charm:~$ echo "print '40:42:0'" > time.py
    exarkun at charm:~$ python
    Python 2.4.3 (#2, Oct  6 2006, 07:52:30)
    [GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import time
    40:42:0
    >>> time.time()
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
    AttributeError: 'module' object has no attribute 'time'
    >>> print time.__file__
    time.py
    >>> ^D
    exarkun at charm:~$ rm time.py
    exarkun at charm:~$ rm time.pyc
    exarkun at charm:~$ python
    Python 2.4.3 (#2, Oct  6 2006, 07:52:30)
    [GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import time
    >>> time.time()
    1187890226.9293921
    >>> print time.__file__
    /usr/lib/python2.4/lib-dynload/time.so
    >>>

Jean-Paul


From semanticist at gmail.com  Fri Aug 31 02:23:13 2007
From: semanticist at gmail.com (Miles)
Date: Fri, 31 Aug 2007 02:23:13 -0400
Subject: fcntl problems
In-Reply-To: <1188515889.352267.220790@q5g2000prf.googlegroups.com>
References: <1188512377.441241.107900@q4g2000prc.googlegroups.com>
	<1188515889.352267.220790@q5g2000prf.googlegroups.com>
Message-ID: <a49e45f50708302323u403da5aey45d07c3c50953f7b@mail.gmail.com>

Sorry, that last quote-only reply was accidental. :)

On 8/30/07, mhearne808 wrote:
> I've been doing some experiments, and here are some specific examples
> to try.

[snipped examples]

> From these last two experiments I can only conclude that file locking
> isn't doing a durned thing.
>
> What's going on?

File locking isn't doing a durned thing in those cases because you're
only obtaining the lock from a single process.

> According to my Python Cookbook:
> "Exclusive lock: This denies all _other_ processes both read and write
> access to the file."

This is only for mandatory locking; POSIX flock is advisory locking,
which states: "Only one process may hold an exclusive lock for a given
file at a given time."  Advisory locks don't have any effect on
processes that don't use locks.  Mandatory locks are kernel enforced,
but non-POSIX and not available in Mac OS X.

-Miles


From http  Wed Aug  8 16:06:40 2007
From: http (Paul Rubin)
Date: 08 Aug 2007 13:06:40 -0700
Subject: Misleading wikipedia article on Python 3?
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
	<eICti.37400$G23.15165@newsreading01.news.tds.net>
	<41Dti.37401$G23.10727@newsreading01.news.tds.net>
	<1186582066.096793.14700@57g2000hsv.googlegroups.com>
	<slrnfbk05n.20o.horpner@FIAD06.norwich.edu>
	<1186600271.858692.182090@22g2000hsm.googlegroups.com>
Message-ID: <7xmyx1bxkf.fsf@ruckus.brouhaha.com>

Istvan Albert <istvan.albert at gmail.com> writes:
>   apply(), callable(), coerce(), file(), reduce(), reload()

reduce() is really gone?????  Maybe itertools can get an ireduce
function or something like that?


From bj_666 at gmx.net  Mon Aug  6 03:12:02 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 6 Aug 2007 07:12:02 GMT
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
Message-ID: <5hnvu2F3kl28iU1@mid.uni-berlin.de>

On Sun, 05 Aug 2007 23:50:24 -0700, Lee Fleming wrote:

> But this, the code that "fixes" the list accumulation confounds me:
> def  f(x, y=None):
>     if y is None: y = []
>     y.append(x)
>     return y
> 
> print f(23)  # prints [23]
> print f(42)  # prints [42]
> 
> Why didn't the second call to f, f(42) return [23, 42]?
> As I understand it, y is only None at the beginning of f(23).
> Then y changes from None to 23. When f ends, doesn't y still have 23
> in it, just as it did in the first function I discussed?

After the function's end, the name local name `y` doesn't exist anymore. 
If you enter a function, the names of the arguments with default values
are bound to those default values.  So in the second call `y` is bound to
`None` just like in the first example `y` is bound to the list at every
call.

> In other words, what's going on here? How is it that y accumulates
> argument values between function calls in the first function, but
> doesn't in the second one?

Not `y` is accumulating but the list object does.

Ciao,
	Marc 'BlackJack' Rintsch


From rcs at bgoark.no  Sat Aug 18 18:05:27 2007
From: rcs at bgoark.no (baalbek)
Date: Sun, 19 Aug 2007 00:05:27 +0200
Subject: Drawing a graph
In-Reply-To: <mailman.1917.1187012829.22759.python-list@python.org>
References: <mailman.1917.1187012829.22759.python-list@python.org>
Message-ID: <46c76d29$0$7449$c83e3ef6@nn1-read.tele2.net>

Ghirai wrote:
> Hello list,
> 
> I need to draw a graph, 2 axes, 2D, nothing fancy.
> One of the axes is time, the other one is a series of integers.
> 
> I don't care much about the output format.
> 
> Are there any specialized libraries for this, or should i use PIL?
> 
> Thanks.
> 

Hey dude, why don't you just bite the bullet and implement your own 
plotting classes using wxPython? For your need (nothing fancy, as you 
said), relying on your own work is better, and making Python/wxPython 
plots is not really difficult. I myself have implemented a complete 
stock graphing application in Python using wxPython, including 
candlesticks and the works. In the long run, you will be better of 
relying on your own effort/understanding, believe me.

Good luck!

Baalbek


From bignose+hates-spam at benfinney.id.au  Mon Aug  6 05:27:01 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 06 Aug 2007 19:27:01 +1000
Subject: Global package variable, is it possible?
References: <1186160415.065108.139160@e9g2000prf.googlegroups.com>
	<46b6d0b4$0$29273$426a74cc@news.free.fr>
Message-ID: <87vebt813u.fsf@benfinney.id.au>

Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> writes:

> I've read all the thread, and it seems that your problem is mostly
> to share a single dynamic state (the config) between several
> modules. So I do wonder: have you considered the use of the
> Singleton pattern (or one of it's variants...) ?

Python modules are effectively singletons. So the idiomatic way to do
this is to create a module for configuration (perhaps named 'config'),
import that into every other module that needs it, and use its
attributes.

-- 
 \       "[On the Internet,] power and control will shift to those who |
  `\       are actually contributing something useful rather than just |
_o__)                                 having lunch."  -- Douglas Adams |
Ben Finney


From msherman77 at yahoo.com  Mon Aug 13 19:11:05 2007
From: msherman77 at yahoo.com (Michael S)
Date: Mon, 13 Aug 2007 19:11:05 -0400 (EDT)
Subject: python & MS Office
Message-ID: <585015.7924.qm@web88303.mail.re4.yahoo.com>

http://msherman77.blogspot.com/2007/08/python-com.html


From mensanator at aol.com  Sun Aug  5 17:28:14 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sun, 05 Aug 2007 14:28:14 -0700
Subject: Google message munging (was: Live editing...)
In-Reply-To: <7xwswfdiur.fsf@ruckus.brouhaha.com>
References: <1185914335.472511.172040@m37g2000prh.googlegroups.com>
	<87r6moc4il.fsf@benfinney.id.au>
	<7xwswfdiur.fsf@ruckus.brouhaha.com>
Message-ID: <1186349294.080749.171440@e16g2000pri.googlegroups.com>

On Jul 31, 10:38?pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Ben Finney <bignose+hates-s... at benfinney.id.au> writes:
> > > [... more lines of broken line wrapping...]
> > What the blazes is Google doing with messages that such a high
> > proportion of them come through in this painful-to-read double-wrapped
> > format? I'm referring to the fact that the lines appear to have been
> > wrapped at one length, and then each line broken again into a long and
> > a short line.
>
> Users write in a text editor formatting the text into lines of
> reasonable size, separated by newline characters.  They then paste the
> text into a web form, which reformats it with slightly shorter lines
> (breaking up the user's longer lines) but leaves the user's newlines
> in place.

Google used to provide a preview before actual posting,
but that is no longer available, so there's nothing the
poster can do about it.



From manasd at gmail.com  Fri Aug 10 08:54:03 2007
From: manasd at gmail.com (MD)
Date: Fri, 10 Aug 2007 05:54:03 -0700
Subject: Does PyModule_GetDict return information about class method
	variables?
In-Reply-To: <5i2c8rF3kqc46U1@mid.uni-berlin.de>
References: <1186713277.019869.265820@d30g2000prg.googlegroups.com>
	<5i2c8rF3kqc46U1@mid.uni-berlin.de>
Message-ID: <1186750443.773641.88450@i13g2000prf.googlegroups.com>

Hi Marc,
   Thanks for your reply. I am calling my extension function from the
class method itself. So at that point the variable does exist. I am
puzzled why PyModule_GetDict is not able to access the variable even
though it does exist at that point.

Thanks,
-Manas

On Aug 10, 12:43 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Thu, 09 Aug 2007 19:34:37 -0700, MD wrote:
> >    I have a variable which is defined inside a class method. When I
> > call PyModule_GetDict on the module containing this class, the
> > dictionary doesn't contain any information about this variable. Is
> > this expected behavior? If so, what options do I have to access this
> > variable from my Python C extension.
>
> You can't access names in methods because they don't exist until you call
> the method.  It's just like local variables in C.  Consider:
>
> void foo(void)
> {
>     int bar = 42;
>
> }
>
> Here `bar` does not exist until you call `foo()` and it disappears as soon
> as the function returns.
>
> It's the very same situation in Python:
>
> class A(object):
>     def foo(self):
>         bar = 42
>
> The local name `bar` only exists if `foo()` is called on an instance of `A`.
>
> Ciao,
>         Marc 'BlackJack' Rintsch




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Aug 14 06:37:17 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 14 Aug 2007 12:37:17 +0200
Subject: Assignments and Variable Substitution
In-Reply-To: <1187085620.641516.269590@b79g2000hse.googlegroups.com>
References: <f9q2qn$i4v$1@solaris.cc.vt.edu>
	<cfb58d850708131223y37ccb61y465fc2f964ad05e4@mail.gmail.com>
	<mailman.1947.1187053596.22759.python-list@python.org>
	<1187085620.641516.269590@b79g2000hse.googlegroups.com>
Message-ID: <46c185dd$0$408$426a74cc@news.free.fr>

Ali a ?crit :
> On Aug 14, 12:45 am, Steve Holden <st... at holdenweb.com> wrote:
>> Evan Klitzke wrote:
>>> On 8/13/07, brad <byte8b... at gmail.com> wrote:
>>>> I'd like to do something like this:
>>>> var = '123'
>>>> %s = [], %var
> 
>> And why would you want a variable whose name is '123'?
> 
> ... and thus continues the search for private variables in Python.

I must be tired, but I don't see what this has to do with "private" 
variables.

But if you want private variables, it's quite easy: prefix their names 
with a single underscore.



From kw at codebykevin.com  Wed Aug  8 12:34:35 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Wed, 08 Aug 2007 12:34:35 -0400
Subject: Tkinter or wxpython?
In-Reply-To: <mailman.1750.1186587557.22759.python-list@python.org>
References: <op.tv98rva4wepdt4@ericb.pragmadev>	<mailman.1677.1186412323.22759.python-list@python.org>	<7xlkcopu4r.fsf@ruckus.brouhaha.com>	<7x7io8r6na.fsf@ruckus.brouhaha.com>
	<hgamo4-p2m.ln1@lairds.us>	<46B9DE7B.3050909@codebykevin.com>
	<mailman.1750.1186587557.22759.python-list@python.org>
Message-ID: <46B9F09B.2060903@codebykevin.com>

Chris Mellon wrote:
> On 8/8/07, Kevin Walzer <kw at codebykevin.com> wrote:

> Using Tile, of course, loses you the first major benefit of Tk - that
> it's already included in the standard library. So in this sense it's
> still "ugly old school look and feel" vs "no external dependencies",
> which is the swing decision for many people. People who prefer the Tk
> API, of course, will be happy to use Tile.

Tile has been implemented in the Tk core starting with version 8.5, 
still somewhere between alpha and beta stage. Once 8.5 is out, and 
Python is configured to build against Tk 8.5 (instead of 8.4), it should 
Just Work.
> 
> Also, while you can get (mostly) native *look*, the feel is absent.
> Unless I'm very uninformed, Tile is a theming engine only, and doesn't
> implement platform conventions with regard to behavior (the "feel"
> part of look and feel).

What do you mean here? Things like keyboard accelerators, menu 
placement, and so on? Those things are already natively implemented by 
Tk, and the developer just needs to invoke them. Sometimes some 
conditional code is required for stuff like keyboard accelerators (the 
"tk windowingsytem" command is useful for this), but again, it should 
Just Work.

Or am I missing something?

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From ldo at geek-central.gen.new_zealand  Sat Aug 25 08:46:45 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 26 Aug 2007 00:46:45 +1200
Subject: make images with python
References: <1187147338.400947.181010@x40g2000prg.googlegroups.com>
	<1i2vg8p.1d8t42r1jzvm9iN%raims@dot.com>
	<mailman.2012.1187186603.22759.python-list@python.org>
Message-ID: <fap87e$ue4$1@lust.ihug.co.nz>

In message <mailman.2012.1187186603.22759.python-list at python.org>, Boris
Borcic wrote:

> Lawrence Oluyede wrote:
>
>> stefano <ssalvatori at gmail.com> wrote:
>>> I need make some images using python but i'm lost :P
>> 
>> <http://www.pythonware.com/products/pil/>
>> 
> 
> If you want to do antialiased drawings into images,
> you might rather want to look for pil at
> 
> http://effbot.org/downloads/
> 
> and grab PIL together with the aggdraw extension
> (while "core" PIL includes some drawing primitives,
> last time I tried they weren't antialiased).

I see that PIL supports image resizing
<http://www.pythonware.com/library/pil/handbook/image.htm> with filters
that can be used for antialiasing. So just do all your drawing at, say,
200% scale, then downsample with Image.resize to antialias.


From n.marinov at sistechnology.com  Thu Aug  9 09:21:43 2007
From: n.marinov at sistechnology.com (nikolay marinov)
Date: Thu, 09 Aug 2007 16:21:43 +0300
Subject: tests
Message-ID: <46BB14E7.6070104@sistechnology.com>

Hi, everyone.Does anybody have an idea how can i test two xls files for 
equality with Python


From deets at nospam.web.de  Wed Aug  8 18:39:27 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 09 Aug 2007 00:39:27 +0200
Subject: help a n00b with a Zope site-package install
In-Reply-To: <1186607528.256756.209030@i38g2000prf.googlegroups.com>
References: <1186607528.256756.209030@i38g2000prf.googlegroups.com>
Message-ID: <5huv0vF3m9ju9U1@mid.uni-berlin.de>

sdoty044 at gmail.com schrieb:
> I am having a general problem getting Zope installed as part of my
> linux distro.

<snip-lots-of-unrelated-text>

We have a general problem solving problems that lack any concrete 
description of what is not working. We need stacktraces and so forth.

Maybe reading this helps:

http://catb.org/~esr/faqs/smart-questions.html

Diez


From kyosohma at gmail.com  Thu Aug  2 10:38:06 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 02 Aug 2007 14:38:06 -0000
Subject: Determining if file is valid image file
In-Reply-To: <mailman.1510.1186065294.22759.python-list@python.org>
References: <1186064098.587590.91210@g4g2000hsf.googlegroups.com>
	<1186064275.652416.250540@d55g2000hsg.googlegroups.com>
	<mailman.1510.1186065294.22759.python-list@python.org>
Message-ID: <1186065486.645871.175590@m37g2000prh.googlegroups.com>

On Aug 2, 9:35 am, Thomas Jollans <tho... at jollans.com> wrote:
> On Thursday 02 August 2007, Andr? wrote:
>
> > On Aug 2, 11:14 am, Andr? <andre.robe... at gmail.com> wrote:
> > > Other than installing PIL, is there a "simple" way using Python only
> > > to determine if a file is a valid image file?
>
> > > I'd be happy if I could at least identify valid images files for gif,
> > > jpeg and png.   Pointers to existing modules or examples would be
> > > appreciated.
>
> > > The reason why I'd prefer not using PIL is that I'd like to bundle
> > > such a function/module in my app.
>
> > I should have added: I'm interesting in validating the file *content*
> > - not the filename :-)
>
> The file name has nothing to do with the type :-P
>
> A straightforward way you won't like: read the specs for all formats you're
> interested in and write the function yourself ;-)

Use the md5 module to create checksums. Links below:

http://www.peterbe.com/plog/using-md5-to-check-equality-between-files
http://effbot.org/librarybook/md5.htm
http://docs.python.org/lib/module-md5.html

Larry is right too...what's wrong with bundling PIL or any third party
module?

Mike



From vdicarlo at gmail.com  Wed Aug 22 12:07:06 2007
From: vdicarlo at gmail.com (vdicarlo)
Date: Wed, 22 Aug 2007 09:07:06 -0700
Subject: IDE for Python
In-Reply-To: <1187702024.675011.324020@q4g2000prc.googlegroups.com>
References: <mailman.55.1187690455.32294.python-list@python.org>
	<1187702024.675011.324020@q4g2000prc.googlegroups.com>
Message-ID: <1187798826.436774.271590@x35g2000prf.googlegroups.com>

> Have you tried SPE?  I don't know how it compares to PyDev but SPE is
> pretty slick.  It has several other tools integrated into it,
> including a pretty nice debugger.

After trying Eclipse and SPE, I'm back to using VIM and the Winpdb
debugger, which is the "pretty nice debugger" in SPE, and which has
become indispensable to me.

Vincent




From ladaan at iptel.org  Wed Aug  8 06:36:59 2007
From: ladaan at iptel.org (Ladislav Andel)
Date: Wed, 08 Aug 2007 12:36:59 +0200
Subject: twisted - locking threads when deferToThread is used
Message-ID: <46B99CCB.1070304@iptel.org>

Hi,
I'm writing an application which will be periodically testing servers.
I will have a global list of these servers(domain names) and need to do
few tasks.
1) DNS checks - I will use asynchronous twisted-names for it
- in case there is a difference comparing to the list it should update 
the list(then also in DB)
2) ICMP pings - should be also possible to do it asynchronously
3) Blocking function which will be pinging with SIP requests
- here I will use function deferToThread to make it non-blocking.

Questions:
1) How do I lock each thread when writing to a global list in twisted?
2) How will I put together all three results mentioned above in the 
global list
- is it by using function callLater ?
3) Could you help me with a rough skeleton of this application, please?

Thank you,
Lada


From geoff.bache at pobox.com  Tue Aug 28 09:59:50 2007
From: geoff.bache at pobox.com (geoffbache)
Date: Tue, 28 Aug 2007 06:59:50 -0700
Subject: Getting subprocesses to be hidden on Windows
In-Reply-To: <1188308231.196513.291260@19g2000hsx.googlegroups.com>
References: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
	<1188250115.875160.276780@r29g2000hsg.googlegroups.com>
	<1188292102.065625.82670@22g2000hsm.googlegroups.com>
	<1188308231.196513.291260@19g2000hsx.googlegroups.com>
Message-ID: <1188309590.114918.257670@y42g2000hsy.googlegroups.com>


> Which GUI toolkit are you using? Tkinter, wxPython, pyQt?

Primarily PyGTK, but I was hoping it wouldn't matter. I hope to be
able
to start the process as indicated in the original post from within my
test
tool and instruct the subprocess to be hidden (or minimized? would
that be easier?),
irrespective of what it was (it might be a Java GUI or anything for
all I care...)

> As for
> losing the command window on Windows, the best way that I know of is
> to just change the extension of the python file itself from *.py to
> *.pyw . I'm pretty sure you can suppress command windows if you're
> calling them from the command line using a flag, but I can't recall
> the flag off the top of my head.
>

Thanks, that seemed to work.

> One way to test while still being able to use your computer is to
> install a virtual machine with VMWare or some similar product. I use
> VMWare's free software for testing some of my scripts, but I've heard
> that Microsoft's got a free virtual product that isn't half bad.

OK. If all else fails I might try that. But if there is a solution to
the original
problem it would be nice not to have to install VMWare everywhere for
convenient testing...

Geoff




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug 29 06:47:57 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 29 Aug 2007 12:47:57 +0200
Subject: Creating a multi-tier client/server application
In-Reply-To: <7xbqcqhqbw.fsf@ruckus.brouhaha.com>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
Message-ID: <46d54ed8$0$429$426a34cc@news.free.fr>

Paul Rubin a ?crit :
> Jeff <jeff.fw at gmail.com> writes:
>> Here's a broad overview of what I need to do:  cross-platform, client-
>> side GUI apps that interact with a server backed by a database.  I'd
>> also like the possibility of having a web interface for small portions
>> of the app.  ...  any advice on anything I've mentioned
>> (or haven't?) 
> 
> Why not do the entire app as a web app, completely bagging the client
> side and just using a browser?  It will help your deployment problems
> a lot, and using https will help with security since it looks like the
> app will be transmitting sensitive data.  It also will simplify your
> networking questions a lot since you're just writing a server.
> 
(snip)
> 
> I would certainly prototype the app as a web app, and then think about
> writing a client gui only if it was clear that usability would really
> benefit from it.  Even still, the server would still look like a web
> server, translating xml requests into database actions and responding
> with xml.

I'd personnaly favor json, which is much more lightweight, perfect for 
structured data, and widely supported.

Else, and however the client is implemented (rich client or web - 
another possible solution being something based on the Mozilla platform, 
but I have no working experience with it so I can't tell if it's a good 
idea...), I'd second the suggestion to have a closer look at the http 
protocol. There's no shortage of support for writing http-based server 
applications in Python (given the context, I'd strongly suggest Pylons).

>> I want to plan this application out as thoroughly
>> as possible before writing any code, 
> 
> There is a school of thought (sometimes associated with "extreme
> programming") that this is more planning than you should really do.
> Think of a cross-country automobile trip.  Figure out the general
> route you want to take, then get in the car and go, making low-level
> decisions as you get to them, rather than trying to plan every gas and
> rest and restaurant stop before you leave.

Anyway, unless you're a genius with decades of working experience, you 
can bet you'll make lots of mistakes in your "planning", mistakes that 
you'll discover when implementing a probably over-engineered design. I'm 
of course *not* advertising a cowboy-coding approach here, and 
preliminary work is certainly mandatory for anything non-trivial, but 
take care about what you really have to worry about here. AFAICT, you 
seem to be on the right track so far (thinking about the possible 
architectures given some already known requirements), but AMHE, 
BigDesignUpFront just doesn't work, so don't overplan.

My 2 cents...


From iapain at gmail.com  Fri Aug 31 12:49:54 2007
From: iapain at gmail.com (iapain)
Date: Fri, 31 Aug 2007 16:49:54 -0000
Subject: Google spreadsheets
In-Reply-To: <1188564051.726895.288860@y42g2000hsy.googlegroups.com>
References: <1188564051.726895.288860@y42g2000hsy.googlegroups.com>
Message-ID: <1188578994.210244.70800@i13g2000prf.googlegroups.com>

On Aug 31, 5:40 pm, Michele Simionato <michele.simion... at gmail.com>
wrote:
> I would like to upload a tab-separated file to a Google spreadsheet
> from Python. Does anybody
> have a recipe handy? TIA,
>
>     Michele Simionato

Probably its irrelevant to python. Use should see Google Spreadsheet
API and use it in your python application.

http://code.google.com/apis/spreadsheets/



From pyth0nc0d3r at gmail.com  Sun Aug 26 14:37:52 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Sun, 26 Aug 2007 13:37:52 -0500
Subject: Lists
Message-ID: <eb79828c0708261137m60f03484xd17cf3881cd9d7e6@mail.gmail.com>

Ok

a = ['spam', 'eggs', 100, 1234]

So basically when I do
print a[1:-1]

that will display all the choices in the array besides 0,3

Slicing was kinda weird, just making sure.
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From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 31 04:49:56 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 31 Aug 2007 10:49:56 +0200
Subject: beginner, idomatic python 2
In-Reply-To: <13der4jquo987d1@corp.supernews.com>
References: <13csjmeaoqh9le3@corp.supernews.com>
	<1187927388.173203.298660@e9g2000prf.googlegroups.com>
	<13d4jfjfogbvq6f@corp.supernews.com>
	<46d2ba7a$0$430$426a74cc@news.free.fr>
	<13der4jquo987d1@corp.supernews.com>
Message-ID: <46d7d623$0$12351$426a74cc@news.free.fr>

bambam a ?crit :
> "Bruno Desthuilliers" <bruno.42.desthuilliers at wtf.websiteburo.oops.com> 
> wrote in message news:46d2ba7a$0$430$426a74cc at news.free.fr...
>> As a side note, in Python, inheritance ...
>> ... should usually not be used for typing.
> 
> :~(
> I'm sorry, I don't even know what that means... The code I
> have inherited from someone only a little more knowledgeable
> than me, and is still full of development artifacts anyway.
> 
> The Pwr and Psp classes inherit from the Device class not
> neccessarily because that is a Good Thing, more because
> the development process led to them being thought of that
> way. All devices have a mixture of common and differing
> attributes.
 >
> What is 'typing'?
> 

Mmm... Most CS experts don't really agree on this, and I'm certainly not 
one (expert). So I won't even try to explain it by myself, and let you 
google for "type system", "static typing", "dynamic typing", "duck 
typing" etc...

Now what I meant here is that in Python, you don't have to make class B 
inherit from class A to let you use an instance of B where an instance 
of A was expected - all you need is that both objects share the set of 
attributes and methods you're going to use. Inheritence is only useful 
for sharing common code.

HTH


From python-url at phaseit.net  Mon Aug 20 09:47:36 2007
From: python-url at phaseit.net (Gabriel Genellina)
Date: Mon, 20 Aug 2007 13:47:36 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (Aug 20)
Message-ID: <fac61o$uf8$1@lairds.us>

QOTW:  "So I never let the age of the universe intimidate me." - mensanator,
on (roughly) the occurrence of large integral exponents in combinatorics and
more

"You're coming from a Perl background, right?  No one else would think of
using a regexp for such a simple thing." - Sion Arrowsmith

    
    More people concerned about Python performance on dual core processors:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/cf1187deca5dd9ac/
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/13da24f2d6dc24a9/
    
    Alex Martelli explains why using reduce() in some cases is a bad idea,
    and how to efficiently obtain a result combining all items in a container:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/78b5953488d772e9/4951b0e0bfd859eb#b65604f723047457
    
    A recursive defaultdict (or an infinite level dictionary)
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/9519c885a24a65ea/7a5bd10726f2c079?#7a5bd10726f2c079
    
    Sorting Unicode is not as easy as one would think ...
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/42c3dadf86f117c
    
    Some thoughts on making indentation play well with blind people
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/80654a87bfa89e3b
    
    Using itertools to allow re-processing of lines already read from a file
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/1aa414f4c6bb5793
    
    
========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance.
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".  Write to the same address to unsubscribe.


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From wildemar at freakmail.de  Sun Aug 19 12:38:43 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Sun, 19 Aug 2007 18:38:43 +0200
Subject: Hot subject: a good python editor and/or IDE?
In-Reply-To: <46C847AD.50709@gmail.com>
References: <mailman.2162.1187525764.22759.python-list@python.org>	<5iqreuF3qanv6U1@mid.individual.net>
	<46C847AD.50709@gmail.com>
Message-ID: <46C87213.5010402@freakmail.de>

Buchoux S?bastien wrote:
> Yeah, I know this is a FAQ, but, as you mention, there is a whole bunch 
> of editors, every one of them being updated constantly (+ the new ones 
> getting out). So I am quite sure that looking through the archives is 
> THE solution since it will only reflect what people thought when 
> question was asked. Just type "best Python editor" on Google and you 
> will see that almost all hits are completely out of date.
> Fair enough though! ;)
>   
Well, since this question pops up about once a *week* on this list, 
chances are the most recent replies are not outdated. Just search this 
group instead of the whole web.

/W


From grflanagan at yahoo.co.uk  Thu Aug  2 03:19:38 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: Thu, 02 Aug 2007 00:19:38 -0700
Subject: Awkward format string
In-Reply-To: <mailman.1454.1186005177.22759.python-list@python.org>
References: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
	<1186003719.783219.104200@r34g2000hsd.googlegroups.com>
	<mailman.1454.1186005177.22759.python-list@python.org>
Message-ID: <1186039178.469009.98870@q75g2000hsh.googlegroups.com>

On Aug 1, 11:52 pm, Ian Clark <icl... at mail.ewu.edu> wrote:
> Gerard Flanagan wrote:
> > (snip)
>
> > def tostring(data):
> >     return tuple(strftime(x) for x in data[:2]) + data[2:]
>
> Hrmm, not sure that having a function named tostring() that returns a
> tuple is the best idea. ;)
>

oops! SAD (Solipsistic API Design)... ;-)

Gerard




From josehectorcontreras at arnet.com.ar  Thu Aug 30 14:53:18 2007
From: josehectorcontreras at arnet.com.ar (=?iso-8859-1?Q?Dr._Jos=E9_Contreras?=)
Date: Thu, 30 Aug 2007 20:53:18 +0200
Subject: Ayuda
Message-ID: <008c01c7eb37$0895eb80$0500000a@wf6840f5e6a1e4>

Gente Inteligente y Distinguida, soy un aficionado y apelo a Ustedes, para
resolver ?ste problema. Para WebMaster de Google, me solicita instalar o
ejecuci?n de pit?n, c?mo comprender?n no dispongo de ning?n guru de web, por
lo que solicito en la medida de sus posibilidades me ayuden a ejecutar pit?n
para WebMaster, para ingresar a sitemap.xlm. Les saludo con distinguida
consideraci?n y respeto. Jos?

 Si son tan amables, les agradecer? cualquiera sea la Repuesta, en Espa?ol o
castellano. Gracias 

-------------- next part --------------
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From bj_666 at gmx.net  Sat Aug 11 09:05:50 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 11 Aug 2007 13:05:50 GMT
Subject: Destruction of generator objects
References: <20070808002852.6228ae91@cube.tz.axivion.com>
	<1186613044.494852.306970@q75g2000hsh.googlegroups.com>
	<20070809011441.05d7dfb6@cube.tz.axivion.com>
	<1186819365.988117.232230@g4g2000hsf.googlegroups.com>
	<20070811121630.1b010eab@cube.tz.axivion.com>
	<1186831173.814193.235420@o61g2000hsh.googlegroups.com>
	<20070811140017.22a11f82@cube.tz.axivion.com>
	<1186834823.389706.137980@r34g2000hsd.googlegroups.com>
	<20070811145033.18c70c0c@cube.tz.axivion.com>
Message-ID: <5i5qheF3ml00gU2@mid.uni-berlin.de>

On Sat, 11 Aug 2007 14:50:33 +0200, Stefan Bellon wrote:

> On Sat, 11 Aug, Kay Schluehr wrote:
> 
>> But why shall the destructor be called? Your example does not indicate
>> that a ListGenerator object is somewhere destroyed neither explicitely
>> using del nor implicitely by destroying the scope it is living in.
> 
> After having constructed the list itself, the generator is exhausted
> and not iterated or referenced anymore, so the generator should be
> destroyed, shouldn't it?
> 
> Ok, let's make the example easier and take out the external iterator
> resource and just concentrate on the Python part:
> 
> class ListGenerator(object):
>     def __init__(self):
>         print "gen init"
>         self.gen = self._value()
> 
>     def __del__(self):
>         print "gen del"
> 
>     def _value(self):
>         print "gen value"
>         for i in xrange(4):
>             yield i
> 
>     def __iter__(self):
>         print "gen iter"
>         return self
> 
>     def next(self):
>         print "gen next"
>         return self.gen.next()
> 
> Now, doing the following:
> 
>>>> a = ListGenerator()
> gen init
>>>> a
> <__main__.ListGenerator object at 0x4020c3ec>
>>>> for i in a: print i
> ... 
> gen iter
> gen next
> gen value
> 0
> gen next
> 1
> gen next
> 2
> gen next
> 3
> gen next
>>>> del a
>>>>
> 
> So why is the destructor not called when the generator is even
> explicitly 'del'ed?

The generator is not ``del``\ed, just the name `a` is removed.

> Does somebody else still hold a reference on it?

Yes, the interactive Python shell holds the last non-`None` result in `_`:

>>> from forum import ListGenerator
>>> a = ListGenerator()
gen init
>>> a
<forum.ListGenerator object at 0xb7d12c4c>
>>> for i in a: print i
...
gen iter
gen next
gen value
0
gen next
1
gen next
2
gen next
3
gen next
>>> del a
>>> _
<forum.ListGenerator object at 0xb7d12c4c>
>>> 42
gen del
42

> But then, even when terminating the interpreter, __del__ is not called.

Because that is not guaranteed by the language reference.  The reason why
it is a bad idea to depend on `__del__` for important resource management.

Ciao,
	Marc 'BlackJack' Rintsch


From kay.schluehr at gmx.net  Sat Aug 11 07:59:29 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sat, 11 Aug 2007 04:59:29 -0700
Subject: The Future of Python Threading
In-Reply-To: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
Message-ID: <1186833569.074364.153320@b79g2000hse.googlegroups.com>

Have you checked out the processing [1] package? I've currently the
impression that people want to change the whole language before they
checkout a new package. It would be nice to read a review.

[1] http://cheeseshop.python.org/pypi/processing



From arkanes at gmail.com  Thu Aug 30 14:36:58 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 30 Aug 2007 13:36:58 -0500
Subject: gc.garbage
In-Reply-To: <1188498335.633506.90050@q4g2000prc.googlegroups.com>
References: <1188467173.708043.44800@w3g2000hsg.googlegroups.com>
	<46D692FC.4030805@v.loewis.de>
	<1188498335.633506.90050@q4g2000prc.googlegroups.com>
Message-ID: <4866bea60708301136u18ca87a0l4abfa888fa4a1c84@mail.gmail.com>

On 8/30/07, 7stud <bbxx789_05ss at yahoo.com> wrote:
> On Aug 30, 3:50 am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > > gc.set_debug(gc.DEBUG_LEAK)
> > > print gc.garbage
> >
> > > --output:--
> > > []
> > > gc: uncollectable <Dog 0x56e10>
> > > gc: uncollectable <Cat 0x56e30>
> > > gc: uncollectable <dict 0x58270>
> > > gc: uncollectable <dict 0x43e40>
> >
> > gc.garbage is filled only after these messages
> > are printed, not before. You need to add an explicit
> > call to gc.collect() if you want to see what
> > uncollectable garbage you have.
> >
> > Regards,
> > Martin
>
> Hi,
>
> Thanks for the response.  I had a cut and paste error in my reply, so
> here it is again with the corrections...
>
> Now, if I run the code:
>
> ------------
> import gc
>
> class Cat(object):
>     def __del__():
>         pass
>
> class Dog(object):
>     def __del__():
>         pass
>
> def some_func():
>     the_dog = Dog()
>     the_cat = Cat()
>     the_dog.cat = the_cat
>     the_cat.dog = the_dog
>
> some_func()
>
> gc.set_debug(gc.DEBUG_LEAK)
> gc.collect()
> print gc.garbage
> -----------
>
> I get this output:
>
> ----------
> gc: uncollectable <Dog 0x56e10>
> gc: uncollectable <Cat 0x56e30>
> gc: uncollectable <dict 0x58300>
> gc: uncollectable <dict 0x43e40>
> [<__main__.Dog object at 0x56e10>, <__main__.Cat object at 0x56e30>,
> {'cat': <__main__.Cat object at 0x56e30>}, {'dog': <__main__.Dog
> object at 0x56e10>}]
> -----------
>
> Why are there two entries in the list for each uncollectable
> object(same addresses)?  Also, I haven't bound the names "cat" or
> "dog" anywhere in my program.  What do those names mean in the list?
>
Read your output carefully!

gc.garbage is a list of objects. The objects are printed just as they
would be anywhere else in Python. You've got the dog object, the cat
object, and the __dict__ of each instance.

> Doing some further testing, if I eliminate the __del__ methods:
>
> -----------
> import gc
>
> class Cat(object):
>     pass
>
> class Dog(object):
>     pass
>
> def some_func():
>     the_dog = Dog()
>     the_cat = Cat()
>     the_dog.cat = the_cat
>     the_cat.dog = the_dog
>
> some_func()
>
> gc.set_debug(gc.DEBUG_LEAK)
> gc.collect()
> print gc.garbage
> -------------------
>
> I get this output:
>
> -----
> gc: collectable <Dog 0x56e10>
> gc: collectable <Cat 0x56e30>
> gc: collectable <dict 0x58270>
> gc: collectable <dict 0x43e40>
> [<__main__.Dog object at 0x56e10>, <__main__.Cat object at 0x56e30>,
> {'cat': <__main__.Cat object at 0x56e30>}, {'dog': <__main__.Dog
> object at 0x56e10>}]
> -----
>
> The docs say:
>
> ---------
> garbage
> A list of objects which the collector found to be unreachable but
> could not be freed (uncollectable objects).
> --------
>
> Since debugging doesn't show any uncollectable objects, why isn't
> gc.garbage empty?  The docs also say:
>
> ----
> garbage
> ...By default, this list contains only objects with __del__() methods.
> ----
>
> Does set_debug() change the default?
>

>From the last line of the documentation block you quoted above: "If
DEBUG_SAVEALL is set, then all unreachable objects will be added to
this list rather than freed."


From ninja.krmenadl at nes.com  Mon Aug 20 16:21:27 2007
From: ninja.krmenadl at nes.com (Boris Ozegovic)
Date: Mon, 20 Aug 2007 22:21:27 +0200
Subject: I Need help from all the group participants
References: <fac7nj$ci9$1@localhost.localdomain>
	<mailman.0.1187630213.32294.python-list@python.org>
	<fack3a$7kk$1@ss408.t-com.hr>
	<1187636668.436474.289220@o80g2000hse.googlegroups.com>
	<facp6k$e0k$1@localhost.localdomain>
	<1187638964.815505.85390@57g2000hsv.googlegroups.com>
Message-ID: <fact3e$e9f$1@localhost.localdomain>

Jason wrote:

> I wonder what John's pulse is?  Display John's pulse.  I need to know
> John's pulse.  How many beats per minute is John's heart going?
> What's John's pulse rate?  How fast is John's heart rate?  How fast is
> John's blood pumping?  What is the rate of John's heart?  What is the
> rate of John's pulse?  How fast is John's heart beating?  What is the
> frequency of John's heart pulses?  What is the frequency of John's
> cardiac cycle?  How fast is John's cardiac cycle?  What is the rate of
> John's pulse?  I want the result of John's auscultation.  Give me
> John's heart beats, or give John death!

Wow!  Thank you very much!  

> If you're trying to do some natural language processing, you should

I'm doing project in AIML, www.alicebot.org/ , which will do all behind
work for me, and I only need to combine patterns, for example (if you are
interested  :) http://www.pandorabots.com/botmaster/en/tutorial?ch=6 , you
can see how AIML works.  Unfortunetly, the problem with NLP, and AIML, is
that you need programmer and someone with linguistic skills.  :) 

-- 
Ne dajte da nas la?ljivac Bandi? truje:
http://cnn.blog.hr/arhiva-2007-06.html#1622776372


From kyosohma at gmail.com  Thu Aug 23 15:18:14 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 23 Aug 2007 12:18:14 -0700
Subject: how to select between two file libraries with same name?
In-Reply-To: <1187894807.228812.266270@q5g2000prf.googlegroups.com>
References: <1187894807.228812.266270@q5g2000prf.googlegroups.com>
Message-ID: <1187896694.750383.170760@m37g2000prh.googlegroups.com>

On Aug 23, 1:46 pm, jmborr <borregu... at gmail.com> wrote:
> Imagine my file one.py contains the statement
> import two
> If there's a two.py in same directory as one.py, then this file will
> be loaded. However, I want to load a different file named also two.py,
> say file ~username/mypythonlib/two.py
> How can I select between the two two.py files ?
> -jose

This kind of thing has been discussed before. See below:

http://mail.python.org/pipermail/python-list/2002-October/167055.html

The basic idea is not to do this. Fix your code so that you never have
this problem through code refactoring.

Mike



From seb.buchoux at gmail.com  Fri Aug 17 03:35:47 2007
From: seb.buchoux at gmail.com (=?ISO-8859-1?Q?S=E9bastien_Buchoux?=)
Date: Fri, 17 Aug 2007 09:35:47 +0200
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
Message-ID: <46C54FD3.6020305@gmail.com>

beginner a ?crit :
> Hi All.
>
> I'd like to do the following in more succint code:
>
> if k in b:
>     a=b[k]
> else:
>     a={}
>     b[k]=a
>
> a['A']=1
>
>
> In perl it is just one line: $a=$b->{"A"} ||={}.
>
> Thanks,
> Geoffrey
>
>   
One solution I often use in such cases:

try:
    a = b[k]
except KeyError: #or except IndexError: if b is a list/tuple and not a dict
    a = {}
    b[k] = a

a['A'] = 1

Indeed, exceptions are handled faster than "if/else" loops. As it was 
mentionned earlier, One neat solution in Perl may not be the perfect one 
in Python.

Cheers,

S?bastien


From whamil1 at entergy.com  Mon Aug  6 13:30:04 2007
From: whamil1 at entergy.com (Hamilton, William )
Date: Mon, 6 Aug 2007 12:30:04 -0500
Subject: Something in the function tutorial confused me.
In-Reply-To: <1186420642.112170.78940@w3g2000hsg.googlegroups.com>
Message-ID: <588D53831C701746A2DF46E365C018CE01D2CAFF@LITEXETSP001.etrsouth.corp.entergy.com>

> From: Lee Fleming
> 
> On Aug 6, 6:25 am, Neil Cerutti <horp... at yahoo.com> wrote:
> Because when the function is called,  the line
> 
> 
> >     if y is None: y = []
> 
> 
> is executed, binding a brand new empty list to y. This
> "rebinding" happens every time the function is called, unless you
> provide an argument for y that is not None.
> 
> Thanks for the prompt replies. But I am still confused. This is what
> confuses me....
> The first time you call the function, say with f(23), after the
> function ends,
> y no longer equals None. Therefore, calling f again, this time like
> this f(24),
> should make y equal [23,24], because the 'if y == None' test fails, or
> at least I think it
> fails, because y.append(x) added something that was not equal to None
> during the previous call.

When you call f(23), the variable y within it gets created and points at
None.  When f(23) exits, the y that it created gets destroyed.  (Well,
goes out of scope, but even if it's not garbage collected it won't ever
come back into scope.)  When you then call f(24), a new y is created
that also points to None, and disappears forever when f(24) exits.

The values in a def statement are created when the def is executed, but
the variables are only created when the function is actually called, and
new ones are created every time the function is called.

--
-Bill Hamilton


From zentraders at gmail.com  Sat Aug 18 22:04:15 2007
From: zentraders at gmail.com (Zentrader)
Date: Sat, 18 Aug 2007 19:04:15 -0700
Subject: How to call module functions inside class instance functions?
In-Reply-To: <1187487622.450655.265000@q4g2000prc.googlegroups.com>
References: <1187484041.838615.259980@e9g2000prf.googlegroups.com>
	<mailman.2154.1187486317.22759.python-list@python.org>
	<1187487622.450655.265000@q4g2000prc.googlegroups.com>
Message-ID: <1187489055.946442.63880@x40g2000prg.googlegroups.com>

> By the way, the reason I am naming it __module_level_func() is because
> I'd like __module_level_func() to be private to the module, like the C
> static function. If the interpreter cannot really enforce it, at least
> it is some sort of naming convention for me.

re the above: set file permissions for testmodule.py to limit access.
IMHO it is a better solution.



From claird at lairds.us  Tue Aug  7 10:00:17 2007
From: claird at lairds.us (Cameron Laird)
Date: Tue, 7 Aug 2007 14:00:17 +0000
Subject: Tkinter or wxpython?
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
	<7x7io8r6na.fsf@ruckus.brouhaha.com>
Message-ID: <hgamo4-p2m.ln1@lairds.us>

In article <7x7io8r6na.fsf at ruckus.brouhaha.com>,
Paul Rubin  <http://phr.cx at NOSPAM.invalid> wrote:
			.
			.
			.
>I should also add: there is also the possibility of running a Python
>program with an embedded http server on the same desktop as the
>browser, using the browser purely as a gui, but with the Python
>program having complete access to the file system and so forth.  This
>could be seen as combining the disadvantages of both the remote web
>server approach (i.e. gui elements constrained by the browser) and the
>all-desktop approach (deployment issues).  However, a lot of the time
>it's still just plain easier to do.  Whenever I've written a desktop
>gui app I've always just been shocked at how much time goes into
>making the gui look decent and do the right stuff, even though none of
>mine have been even slightly slick (they've all been for industrial
>applications).  When I do a web gui, it's been just a matter of
>tossing some html into a file or into some print statements, viewing
>it in a browser, and tweaking it a little as needed.  Maybe that's
>mostly a matter of the lousy state of gui toolkits, and we actually
>need a toolkit that's more like an embedded browser.  But we don't
>have that at the moment.

One key to Tkinter's longevity lurks there.  While
many whine about the antiquity of the appearance of
Tkinter's widgets, they have the virtue of sensible
defaults; more than any other toolkit, Tkinter comes
up with minimal refinements in a sensible and
consistent state.  While those with an artistic eye
assure me the simplest Tkinter programs look worse
that corresponding ones built with any other toolkit,
they behave the most coherently in regards to resizing
and so on.



From zyzhu2000 at gmail.com  Mon Aug 20 14:25:23 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Mon, 20 Aug 2007 18:25:23 -0000
Subject: str().join() isn't working
In-Reply-To: <mailman.4.1187633821.32294.python-list@python.org>
References: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com>
	<mailman.4.1187633821.32294.python-list@python.org>
Message-ID: <1187634323.092460.39800@q3g2000prf.googlegroups.com>

On Aug 20, 1:16 pm, "Robert Dailey" <rcdai... at gmail.com> wrote:
> here is a more realized example of the lists I'm trying to join:
>
> _user_includes = [
>         "../src",
>         "../resource",
>         "../inc",
>         "../src",
>         "../data",
>         "../gui",
>         "../script",
>         "../script/actions",
>         "../gui/dispatch",
>         "../gui/factories",
>         "../gui/frames",
>         "../gui/getters",
>         "../gui/localization",
>         "../gui/player",
>         "../gui/setters",
>         "../gui/utilities",
>         "../sis",
>         "../player",
>         "../platform/ngi",
>         "../../engine",
>         "../../engine/audio/NGI",
>         "../../engine/io",
>         "../../engine/io\NGI",
>         "../../engine/math",
>         "../../engine/math/fixed",
>         "../../engine/path/NGI",
>         "../../engine/text/NGI",
>         "../../engine/mem",
>         "../../engine/text",
>         "../../engine/observer",
>         "../../sdk/tiny_xml",
>         "../../sdk/zlib",
>         "../../sdk/lpng",
>         "../../sdk/IFDLib/Source/Precompile",
>         "../../sdk/IFDLib/Source/CoreLib",
>         "../../sdk/IFDLib/inc",
>         "../../sdk/IFDLib/Source/UtilLib",
>         "../../sdk/IFDLib/Source/GameLib",
>         "../../sdk/IFDlib/Source/OSLib/_NGI",
>         "../../sdk/stl-port/NGI",
>         "../../sdk/mini-boost/NGI",
>         "../../sdk/mini-boost/COMMON",
>         ]
>
> _system_includes = [
>         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include",
>         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include/osextensions/rg?a",
>         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include/osextensions/st?dapis",
>         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include/osextensions/st?dapis/stlport",
>         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/epoc32/include/variant"
>         ]
>
> On 8/20/07, Robert Dailey <rcdai... at gmail.com> wrote:
>
>
>
> > Hi,
>
> > First have a look at the following code:
>
> > In main.py:
> > ---------------------------------------------------------------------------?--------
> >     space = " "
>
> >     includes = space.join ( system._user_includes ) + " " + space.join(
> > system._system_includes )
>
> > In system.py:
> > ---------------------------------------------------------------------------?--------
> > _user_includes = [
> >     ]
>
> > _system_includes = [
> >     ]
>
> > The above does not work. The interpreter states: "TypeError: sequence item
> > 0: expected string, list found". I'm not sure what this means. Can anyone
> > help me figure out what I'm doing wrong? Thanks.
>
> > PS: I've also tried putting strings in the lists above just to make sure
> > that them being empty wasn't the problem. I got no different results.- Hide quoted text -
>
> - Show quoted text -


I have no system.py, but when I run

includes = space.join (_user_includes ) + " " +
space.join(_system_includes )


with the lists given in your post, I get no error. I am using v2.5.1
on Windows XP.




From bronger at physik.rwth-aachen.de  Wed Aug 15 12:28:29 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 15 Aug 2007 18:28:29 +0200
Subject: All names in the current module
Message-ID: <87d4xowymq.fsf@wilson.homeunix.com>

Hall?chen!

How can I get a list with all classes defined in the current module?
Thank you!

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From aahz at pythoncraft.com  Thu Aug  9 17:34:00 2007
From: aahz at pythoncraft.com (Aahz)
Date: 9 Aug 2007 14:34:00 -0700
Subject: Stackless Integration
References: <1186650027.043779.276520@i38g2000prf.googlegroups.com>
	<mailman.1786.1186660119.22759.python-list@python.org>
	<1186678419.594781.149190@g12g2000prg.googlegroups.com>
	<slrnfbmj19.1bg.horpner@FIAD06.norwich.edu>
Message-ID: <f9g188$stl$1@panix3.panix.com>

In article <slrnfbmj19.1bg.horpner at FIAD06.norwich.edu>,
Neil Cerutti  <horpner at yahoo.com> wrote:
>On 2007-08-09, Justin T. <jmtulloss at gmail.com> wrote:
>>JP Calderone:
>>>
>>> It's not Pythonic.
>>
>> Ha! I wish there was a way to indicate sarcasm on the net. You
>> almost got people all riled up!
>
>Sorry. There's NO WAY to show sarcasm on the net. ;)

"If sarcasm were posted to the Net, would anybody notice?"  --JDN
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"And if that makes me an elitist...I couldn't be happier."  --JMS


From bignose+hates-spam at benfinney.id.au  Wed Aug  1 19:54:43 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 02 Aug 2007 09:54:43 +1000
Subject: Emacs + python
References: <ak8x8v2udo.fsf@googlemail.com>
Message-ID: <878x8udd4s.fsf@benfinney.id.au>

Hadron <hadronquark at googlemail.com> writes:

> Could anyone put me on the right track to developing Python with emacs
> please : modes to consider, debugging etc hopefully all within emacs.

The mode you're looking for is 'python-mode'. Turn it on (M-x
python-mode), then read its help (C-h m) for all the cool things you
can do.

-- 
 \       "Our products just aren't engineered for security."  -- Brian |
  `\             Valentine, senior vice-president of Microsoft Windows |
_o__)                                                      development |
Ben Finney


From iclark at mail.ewu.edu  Mon Aug 13 16:45:40 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Mon, 13 Aug 2007 13:45:40 -0700
Subject: Getting started with JPype
In-Reply-To: <1187014607.465437.97460@19g2000hsx.googlegroups.com>
References: <1187014607.465437.97460@19g2000hsx.googlegroups.com>
Message-ID: <f9qftl$31v$1@sea.gmane.org>

Disclaimer: I have never used (or even heard of) JPype before...

porter wrote:
(snip)
> 
> "Package myclass.HelloWorld is not Callable"
> 
(snip)
> 
> from jpype import *
> 
> startJVM(getDefaultJVMPath(), "-ea", "-Djava.class.path=D:/tmp/jpype-
> reli/test/dist/test.jar'' )
> 
> package = JPackage("myclass")

Shouldn't this be `package = JPackage("myclasses")` as your Java code is 
contained in the package 'myclasses' not 'myclass'?

> x = package.HelloWorld()

Change this last line to: `x = package.HelloWorld`
(class would be a better name than x IMO)

> x.do_a_message()
> 
> shutdownJVM()

It looks like JPype exports Java classes as members of the object 
referred to by `package`. You then try and call it with () and python 
throws it's hands in the air as it must not be a callable.

Ian



From nospam at here.com.org  Wed Aug 22 14:31:24 2007
From: nospam at here.com.org (Eric)
Date: Wed, 22 Aug 2007 14:31:24 -0400
Subject: Free Air Conditioners!!!!!!
References: <1187738115.972271.94080@r23g2000prd.googlegroups.com>
	<OXgBfsH5HHA.1212@TK2MSFTNGP05.phx.gbl>
	<1187806818.490520.231690@e9g2000prf.googlegroups.com>
Message-ID: <46cc80fd$0$5180$9a6e19ea@unlimited.newshosting.com>

And $15 shipping to get the "free" paper sent to you!  ;^)


"Zentrader" <zentraders at gmail.com> wrote in message news:1187806818.490520.231690 at e9g2000prf.googlegroups.com...
> On Aug 21, 10:13 pm, "Scott M." <s-... at nospam.nospam> wrote:
>> Oh my God!  How did you know?!!  You were so smart to post that here!
>>
>> <manager... at gmail.com> wrote in message
>>
>> news:1187738115.972271.94080 at r23g2000prd.googlegroups.com...
>>
>> >http://freeairconditioners.blogspot.com/
>
> It's probably a handheld fan made out of a piece of paper
> 




From jstroud at mbi.ucla.edu  Wed Aug 22 19:11:29 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 22 Aug 2007 16:11:29 -0700
Subject: libgmail failure
In-Reply-To: <1187810899.496022.314240@z24g2000prh.googlegroups.com>
References: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
	<il_yi.1379$JD.695@newssvr21.news.prodigy.net>
	<1187810899.496022.314240@z24g2000prh.googlegroups.com>
Message-ID: <8j3zi.4129$Oo.2593@newssvr17.news.prodigy.net>

james.p.news at gmail.com wrote:
> On Aug 22, 10:26 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
>> Have you thought about spoofing explorer? Always spoof explorer.
>>
>> James
> 
> 
> I have not heard of this.  How do you spoof IE in libgmail?

You might have to edit libgmail.py directly and add a header to the 
urllib2.Request() call. Here are the relevant lines from some code I 
wrote (spoofing netscape it looks like):

user_agent = 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)'
txheaders =  {'User-agent' : user_agent}
req = urllib2.Request(pda, signin_params, txheaders)

See if this doesn't fix you up.

James


From steve at holdenweb.com  Sat Aug 18 08:09:39 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 18 Aug 2007 08:09:39 -0400
Subject: passing arguments with ampersands
In-Reply-To: <20070818112913.GA3632@gmail.com>
References: <f6be0af40708180354u719f5c71p2be27e0ee8317f9b@mail.gmail.com>
	<20070818112913.GA3632@gmail.com>
Message-ID: <fa6nhr$3go$1@sea.gmane.org>

O.R.Senthil Kumaran wrote:
>> Quote:D:\ftp\Music\Mixes & Compilations\Above & Beyond - Essential
>> Mix\001_Essential_Mix_2004-06-06_-_Above_and_Beyond.txt
> 
>> when i put 'print sys.argv[1:]' at the very beginning of the script, all i
>> get is this:
>>
>> Quote:['D:\\ftp\\Music\\Mixes']
>>
> Can you share the portion of the code?
> Are you quoting the argument that you are passing?
> for e.g:
> 
> #cat 1.py
> import sys
> print sys.argv[1]
> 
> #python 1.py "I am able to print the spaces and & characters"
> I am able to print the spaces and & characters
> 
I suspect that the ampersand is being interpreted as a command 
terminator, and that the shell syntax error has been overlooked.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From frikker at gmail.com  Thu Aug  2 11:34:11 2007
From: frikker at gmail.com (frikk)
Date: Thu, 02 Aug 2007 08:34:11 -0700
Subject: Memory Leak with Tkinter Canvas (Python 2.5 Win32)
Message-ID: <1186068851.011344.322980@i13g2000prf.googlegroups.com>

Hey everyone.  I have been working with python for a couple years now,
but just recently built my first program with a GUI.  I decided to
start with Tkinter since it is included with the base package,
although wxWindows will likely be my next choice.  Tkinter seems to be
pretty slow for my needs.

Anyway - I am building a genetic algorithm simulator.  I have a grid
where an Ant moves around.  It is infeasible for me to update the grid
every simulation step - so I just do it at the end.  But what I've
realized is that my program performs worse and worse when I update the
grid.  Turns out there is a memory leak somewhere and I don't think it
is in my code.  The memory leak occurs only when I write (via
create_rectangle) to the canvas widget.  I wrote the following small
script to demonstrate this problem (see below).  Every time the button
is pressed, _1040KB_ is added to the RAM of wpython.exe.  This adds up
FAST.   I have not verified this on my OS X box.

As you can see- I am doing nothing other than drawing a lot of
rectangles on the canvas.  I have two questions.

  1.  Is this a bug in my usage of Tkinter? Am I somehow leaving
objects laying around that aren't being deleted? Is create_rectangle
not the appropriate function to use?)
  2.  Is there a better, quicker way to update a "grid"-like object?

Thanks,
Blaine

Current System:
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32
Windows XP SP2 - all recent patches and updates

Script:

from Tkinter import *

canv = None
HEIGHT=600
WIDTH=600
def clear_grid():
    for i in range(0,HEIGHT/10):
        for j in range(0, HEIGHT/10):
            canv.create_rectangle(i*10,j*10, \
                                  i*10+10, j*10+10, \
                                  fill = "white")

def draw_window(master):
    global canv
    frame = Frame(master)

    btn_grid = Button(frame, text="draw grid", command=clear_grid)
    btn_grid.pack(side=TOP)

    canv = Canvas(frame, height=HEIGHT, width=WIDTH, bg='white')
    canv.pack()
    frame.pack()

root = Tk()
draw_window(root)
mainloop()



From ksuindu at vsnl.net  Thu Aug  9 02:28:27 2007
From: ksuindu at vsnl.net (indu_shreenath)
Date: Thu, 09 Aug 2007 06:28:27 -0000
Subject: how to get output.
Message-ID: <f9ec6b+5sa2@eGroups.com>

Hey,
I want to get the output of "DIR /AD /B" command to a varriable using 
python. How can I do this?
Thanks,
Indu



From gagsl-py2 at yahoo.com.ar  Mon Aug 20 04:05:48 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Aug 2007 05:05:48 -0300
Subject: Problem with Thread.join()
References: <496954360708131610i62c0a63aneb7c39d23a052ac0@mail.gmail.com>
Message-ID: <op.txcl3yoox6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 13 Aug 2007 20:10:53 -0300, Robert Dailey <rcdailey at gmail.com>  
escribi?:

> I have a class that derives from threading.Thread. To signal the thread  
> to
> exit its infinite loop, I set an Event. Once the thread checks  
> Event.isSet()
> and it is true, it proceeds to break out of the loop and exit the  
> function.
> In the main thread, right after calling Event.set(), I call  
> Thread.join() to
> wait on the thread to exit. However, if I call Thread.join() the  
> application
> locks up because for some reason calling Thread.join() prevents the  
> thread
> from exiting. I don't know why. Any help? Thanks...

Conceptually you're doing it the right way. Post some code demonstrating  
the problem...

-- 
Gabriel Genellina



From arkanes at gmail.com  Thu Aug 16 15:03:36 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 16 Aug 2007 14:03:36 -0500
Subject: Accessing Windows Network Share?
In-Reply-To: <1187289961.104183.104910@50g2000hsm.googlegroups.com>
References: <1187287133.737105.169960@19g2000hsx.googlegroups.com>
	<mailman.2071.1187289811.22759.python-list@python.org>
	<1187289961.104183.104910@50g2000hsm.googlegroups.com>
Message-ID: <4866bea60708161203j7e9138der343d4ef15b1c371e@mail.gmail.com>

On 8/16/07, frikk <frikker at gmail.com> wrote:
> On Aug 16, 2:43 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> > On 8/16/07, frikk <frik... at gmail.com> wrote:
> >
> >
> >
> >
> >
> > > I previously posted about accessing SharePoint over the web. Well I
> > > have since given up any easy means of doing this, since something else
> > > has perked my interest.  Instead of going tohttp://sharepoint/site,
> > > why not just access \\sharepoint\site\ directly?
> >
> > > So my question is this - How do I access that network share?
> >
> > > If I go to start -> run, and type in "\\SharPointServer\Site\Folder",
> > > windows explorer will pop up with it.  I suppose I could have a little
> > > batch script that python runs to map the drive to a local letter, like
> > > J:, but this does not seem necessary.
> >
> > > Suggestions?
> >
> > > This does not work, for obvious reasons:
> > > >>> import glob.glob
> > > >>> glob.glob("\\\\server\\folder\\*")
> > > []
> >
> > I don't see whats "obvious" about this. Access to windows shares is
> > handled by Windows in a VFS layer, and glob and all other Python file
> > access works fine over them for me.- Hide quoted text -
> >
> > - Show quoted text -
>
> Haha ok, you're right its not obvious. Sorry for that.
>
> But that code does not work - should it?
>
> Do you have an example of glob working over a file share, not a
> network mapped drive?
>

import glob
glob.glob(r"\\localhost\c$\python25\libs\*")
['\\\\localhost\\c$\\python25\\libs\\bz2.lib',
'\\\\localhost\\c$\\python25\\libs\\libpython25.a',
'\\\\localhost\\c$\\python25\\libs\\pyexpat.lib',
'\\\\localhost\\c$\\python25\\libs\\python25.lib',
'\\\\localhost\\c$\\python25\\libs\\select.lib',
'\\\\localhost\\c$\\python25\\libs\\unicodedata.lib',
'\\\\localhost\\c$\\python25\\libs\\winsound.lib',
'\\\\localhost\\c$\\python25\\libs\\_bsddb.lib',
'\\\\localhost\\c$\\python25\\libs\\_ctypes.lib',
'\\\\localhost\\c$\\python25\\libs\\_ctypes_test.lib',
'\\\\localhost\\c$\\python25\\libs\\_elementtree.lib',
'\\\\localhost\\c$\\python25\\libs\\_hashlib.lib',
'\\\\localhost\\c$\\python25\\libs\\_msi.lib',
'\\\\localhost\\c$\\python25\\libs\\_socket.lib',
'\\\\localhost\\c$\\python25\\libs\\_sqlite3.lib',
'\\\\localhost\\c$\\python25\\libs\\_ssl.lib',
'\\\\localhost\\c$\\python25\\libs\\_testcapi.lib',
'\\\\localhost\\c$\\python25\\libs\\_tkinter.lib']



I do it all the time. I'd double check your slash escaping (consider
using r'') and pathnames.


From cesmiga at gmail.com  Tue Aug 21 12:09:23 2007
From: cesmiga at gmail.com (epsilon)
Date: Tue, 21 Aug 2007 09:09:23 -0700
Subject: Trouble with CGI code from Code Example 7.3 of the "Python
	Interactive CGI Tutorial"
In-Reply-To: <1187710122.354087.158910@o80g2000hse.googlegroups.com>
References: <1187705685.007927.55030@z24g2000prh.googlegroups.com>
	<1187710122.354087.158910@o80g2000hse.googlegroups.com>
Message-ID: <1187712563.590974.54160@r23g2000prd.googlegroups.com>

Gabriel,

Thanks a bunch for your time!  That took care of it.

Christopher


Gabriel Genellina wrote:
> On 21 ago, 11:14, epsilon <cesm... at gmail.com> wrote:
>
> > I'm having trouble with this script from a CGI lesson I'm working and
> > I can't seem to figure it out.  I was wondering if someone could tell
> > me what is wrong.  I've spent several hours trying to debug, but no
> > success.  Any help would be appreciated.
>
> Next time try to post the exact error message you get - working
> crystall balls are hard to find nowadays :)
> Ok, it's a syntax error, perhaps you didn't get a useful response from
> the server.
> The error is here:
>
> >         if (session_key == 0):
> >             session_key = create_session(id)
> >             print id, , you are logged in with key:", session_key,
>
> That should read:
>
>             print id, "you are logged in with key:", session_key, "\n"
>
> --
> Gabriel Genellina



From michael at jedimindworks.com  Mon Aug 27 14:44:11 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Mon, 27 Aug 2007 11:44:11 -0700
Subject: convert non-delimited to delimited
In-Reply-To: <1188237563.889663.228970@o80g2000hse.googlegroups.com>
References: <1188237563.889663.228970@o80g2000hse.googlegroups.com>
Message-ID: <48FC2954-1743-4484-8681-188B110CE879@jedimindworks.com>


On Aug 27, 2007, at 10:59 AM, RyanL wrote:

> I'm a newbie!  I have a non-delimited data file that I'd like to
> convert to delimited.
>
> Example...
> Line in non-delimited file:
> 0139725635999992000010100534+42050-102800FM-15+1198KAIA
>
> Should be:
> 0139,725635,99999,2000,01,01,00,53,4,+42050,-102800,FM-15,+1198,KAIA
>
> What is the best way to go about this?  I've looked all over for
> examples, help, suggestions, but have not found much.  CSV module
> doesn't seem to do exactly what I want.  Maybe I'm just missing
> something or not using the correct terminology in my searches.  Any
> assistance is greatly appreaciated!  Using Python 2.4

Is each data element a fixed size?




From twisted0n3 at gmail.com  Tue Aug 21 11:05:16 2007
From: twisted0n3 at gmail.com (Twisted)
Date: Tue, 21 Aug 2007 15:05:16 -0000
Subject: Latest models of Gibson guitars
In-Reply-To: <1187700758.572516.186610@57g2000hsv.googlegroups.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<1187548916.909340.37420@k79g2000hse.googlegroups.com>
	<1187579396.285862.186860@e9g2000prf.googlegroups.com>
	<9K6dnY8HnIUNHlTbnZ2dnUVZ_gGdnZ2d@comcast.com>
	<1187657694.106990.266830@z24g2000prh.googlegroups.com>
	<1187700758.572516.186610@57g2000hsv.googlegroups.com>
Message-ID: <1187708716.843211.141790@e9g2000prf.googlegroups.com>

On Aug 21, 8:52 am, kaldrenon <kaldre... at gmail.com> wrote:
> On Aug 20, 8:54 pm, Twisted <twisted... at gmail.com> wrote:
>
> > If the message then
> > says something absurd, like "this is a newsgroup about Python" when
> > I'm reading it in cljp, well, what do you expect? :P
>
> I think most would expect you to go, "WTF?" but then, like a rational
> person, click the helpful little "More options" link that GG provides

[snip rest of insult-implying randomness]

Er, right, whatever. :P

> > though nothing in the headers would indicate this.
>
> Newsgroups: comp.lang.java.programmer,
> microsoft.public.dotnet.framework.aspnet, comp.lang.python,
> rec.photo.digital, alt.home.repair

That indicates a *crosspost*. As I was saying in the post you've
willfully misinterpreted in order to attack me, there is however
nothing of the sort to indicate a *multipost*.




From ironfroggy at gmail.com  Fri Aug  3 11:57:07 2007
From: ironfroggy at gmail.com (Calvin Spealman)
Date: Fri, 3 Aug 2007 11:57:07 -0400
Subject: Coroutine API
Message-ID: <76fd5acf0708030857we41631bv3a592f00c134b954@mail.gmail.com>

I was talking to some other people, who all were working on different
schedulers and such for coroutines. We decided to work out a common
API to give coroutines, and common rules to passing data between them,
etc. I am wondering now if there is already work on this, or some
schedulers I'm not aware of that have any deployment and a good,
simple design.

We also setup a group to discuss this and iron out our details and
some common coroutines. python-coro at googlegroups.com

We came up with this basic rule set:
1) A coroutine can be any iterable
2) A coroutine yielding None is suspending to allow others to run
3) A coroutine yielding something else is yielding another coroutine
and needs to stay suspended until that coroutine has a value to pass
to the send() method of the coroutine.
4) In the above case, if the yielded coroutine raises an exception, it
is passed to the waiting coroutine's throw() method.
5) A coroutine raising StopIteration(arg), where arg is its final
result, expects arg to be passed to the send() method of any coroutine
which is waiting for its completion.

The idea is that we don't rely on defining any new types or functions
and we keep it extremely simple. I'd like to consider it WSGI for
coroutines.

-- 
Read my blog! I depend on your acceptance of my opinion! I am interesting!
http://ironfroggy-code.blogspot.com/


From tdelaney at avaya.com  Wed Aug  8 19:34:46 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Thu, 9 Aug 2007 07:34:46 +0800
Subject: Jython - problem import os
In-Reply-To: <1186575029.494729.327550@b79g2000hse.googlegroups.com>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C0848FD@301081ANEX2.global.avaya.com>

nmin at freenet.de wrote:

> I'm using Jython in combination with Java, webservices and jboss4.0.4.
> 
> The webservice is implemented in java and creates an PythonInterpreter
> object which loads the jython scripts.
> I wrote an jython script which uses a function from another jython
> file called library.py.

...

> ImportError: no module named javaos in library.py.
> 
> Any ideas?

You need to make sure that the Jython Lib directory is on sys.path - the
easiest way it to put it in the same directory as jython.jar e.g. in
your webapp have:

WEB-INF/
    lib/
        jython.jar
        Lib/
            ...
            os.py
            ...

Tim Delaney


From godzillaismad at gmail.com  Thu Aug  9 20:25:00 2007
From: godzillaismad at gmail.com (Godzilla)
Date: Fri, 10 Aug 2007 00:25:00 -0000
Subject: Deleting objects on the fly
Message-ID: <1186705500.227658.163170@q3g2000prf.googlegroups.com>

Hello,

I wish to know whether I should delete objects created on the fly via
the "del obj" statement. I noticed the RAM usage increased whenever
the application is being run for a long time. I am creating lots of
objects (messages) on the fly for communication between threads.

Rather than having python's gc to do the work, does it make a
difference if I force a deletion?

Thanks.



From python at jayloden.com  Wed Aug  1 18:13:16 2007
From: python at jayloden.com (Jay Loden)
Date: Wed, 01 Aug 2007 18:13:16 -0400
Subject: Filemaker interactions
In-Reply-To: <1186004514.108975.119380@e9g2000prf.googlegroups.com>
References: <1186004514.108975.119380@e9g2000prf.googlegroups.com>
Message-ID: <46B1057C.8090207@jayloden.com>

Ian Witham wrote:
> Hello,
> 
> I'm hoping someone here can put me on the right track with some broad
> concepts here.
> 
> What I am hoping to achieve is a simple HTML page to be served over
> our company LAN, into which the users (Real Estate Agents) can enter a
> property address or reference number.
> 
> My next thought was to have a Python CGI script query our filemaker
> database of property listings, construct a PDF from the relevant
> information, and finally return this PDF to the user.
> 
> At no stage do I want the user to have unfettered access to the
> database or the ability to alter/delete records.
> 
> My question is: what is the most appropriate way for my script to
> interact with Filemaker? Can this be done with Filemaker Pro 6?
> 
> According to the Filemaker Help, the "Local Data Access Companion"
> shares the FileMaker Pro database with ODBC-compliant applications on
> the same computer. Is this the right option?
> 
> Can my CGI script be an ODBC client? How? Would it need to be
> Filemaker specific code or does ODBC have a standardised format?
> 
> I'm grateful for any advice and a nudge in the right direction.
> 
> Ian.

I don't know if this helps, but there is a PyFileMaker module for Python for interacting with FileMaker: 
http://www.sourcefiles.org/Programming/Development/Modules/Python/PyFileMaker-1.2a4.zip

That seems to be the only still working link to the module I can find, so I'm guessing it's not in active development. 

-Jay


From mobilendd at gmail.com  Sat Aug 18 04:57:27 2007
From: mobilendd at gmail.com (mobilendd at gmail.com)
Date: Sat, 18 Aug 2007 08:57:27 -0000
Subject: Guitars, amps, tabs and more!!
Message-ID: <1187427447.182008.26540@w3g2000hsg.googlegroups.com>


Reviews of latest models of best guitars, fender, gibson, yamaha, and
many more, with pictures and prices.

http://pro-guitars.blogspot.com/


And if you want to win a free guitar go here

http://freeguitars.blogspot.com/



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Aug 14 03:37:05 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 14 Aug 2007 09:37:05 +0200
Subject: Module imports during object instantiation
In-Reply-To: <mailman.1929.1187029825.22759.python-list@python.org>
References: <mailman.1845.1186783217.22759.python-list@python.org>	<46c00f2d$0$298$426a34cc@news.free.fr>
	<mailman.1929.1187029825.22759.python-list@python.org>
Message-ID: <46c15b9e$0$433$426a34cc@news.free.fr>

Ritesh Raj Sarraf a ?crit :
> Bruno Desthuilliers wrote:
> 
>> Ritesh Raj Sarraf a ?crit :
>>>         if lock is None or lock != 1:
>>>             self.DispLock = False
>>>         else:
>>>             self.DispLock = threading.Lock()
>>>             self.lock = True
>>>
>>>         if os.name == 'posix':
>>>            self.platform = 'posix'
>>>            self.color = get_colors()
>>>
>>>         elif os.name in ['nt', 'dos']:
>>>             self.platform = 'microsoft'
>>>             
>>>             try:
>>>                 import SomeModule
>>>             except ImportError:
>>>                 self.Set_Flag = None
>>>             
>>>             if self.Set_Flag is not None:
>>>                 self.color = SomeModule.get_colors_windows()
>>>
>>>         else:
>>>             self.platform = None
>>>             self.color = None
>>>
>>> When I create an object the "import" part never gets executed. Is there a
>>> reason behind it ?
>> what does "print os.name" yields ?
> 
> On Windows: nt
> On Linux: posix

Mmm... I guess you didn't understood my question. I do know the os 
module. You assert the "import" is never executed. Since it's only 
executed on a non-posix platform, I asked on what platform you where 
testing.


> 
>>> I mean I'd like to keep my class as independent as I want. So that when
>>> later I need to use it somewhere else, I don't need to know if it depends
>>> on any modules.
>>  >
>>
>> Then pass the module to the initializer. Python's modules are objects...
>>
> 
> Yes, that's an option. But is that the only one?

No.

> To me it looks like an ugly way of doing.

Really ? Why so ? You say you want to keep your class "as independant" 
(you don't say from what, but...). Can you imagine a way to get less 
coupling than passing appropriate parameters to the initializer ?




From Dominic at PLEASEASK.co.uk  Tue Aug 14 08:59:16 2007
From: Dominic at PLEASEASK.co.uk (special_dragonfly)
Date: Tue, 14 Aug 2007 13:59:16 +0100
Subject: Class problems.
Message-ID: <46c1a34a$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>

Hello,
I'm having problems retrieving data I think I've put into my program. I have 
a class and a function. I'm reading in from a personally made text file of 
the data needed for the class. The FieldsDictionary needs to be accesable 
outside the function, but my problem is this:
the print FieldsDictionary[key].Fieldname (which I should have just created 
because of the line above), returns:
AttributeError: 'list' object has no attribute 'Fieldname'
am I just accessing it wrongly?
I was under the impression that Fields Dictionary should contain a key 
referencing to a list of instances of the class. i.e. 
FieldsDictionary{key:[instance1, instance2, instance 3]}
Is this not what I've programmed?

class FieldClass(object):
    def 
__init__(self,Fieldname="",Fieldlength=0,Type=["A","S","N"],Location=["D","C","L","H","TBA"]):
        self.Fieldname=Fieldname
        self.Fieldlength=Fieldlength
        self.Type=Type
        self.Location=Location

def 
EnterDictionary(FieldsDictionary,key,myfile,FIELD_QUANTITY_OFFSET,LINE_START,LINE_END):
    data=myfile.readline().strip()
    for i in range(int(data[FIELD_QUANTITY_OFFSET:])):
        args =myfile.readline().strip()[LINE_START:LINE_END].split(",")
        print args
        FieldsDictionary.setdefault(key, []).append(FieldClass(*args))
        print FieldsDictionary[key].Fieldname 




From steve at holdenweb.com  Sun Aug 12 17:14:36 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Aug 2007 17:14:36 -0400
Subject: cgi and headers
In-Reply-To: <49261.74.2.36.140.1186952205.squirrel@mail.el.net>
References: <49261.74.2.36.140.1186952205.squirrel@mail.el.net>
Message-ID: <f9nt7n$hgm$2@sea.gmane.org>

kalin mintchev wrote:
> hi there...
> 
> i'm starting to work with python cgi scripts using ajax.
> one problem i have is that the cgi module doesn;t do (apparently) anything
> without the -- print "Content-type: text/html\n" -- line in the script.
> 
> the issue is that the output of the script has to be an xml file and not
> an html. it's not really a problem for any normal browser but the retarded
> explorer thing doesn;t process the xml unless it gets back the xml header.
> 
> so my scripts work fine on mozilla but not in explorer because of the
> missing xml header.
> 
> what would be the correct solution for this?
> 
> thanks....
> 
> 
> 
try "text/xml" or "text/html+xml" as content type. FWIW IE 6 actually 
required an extension of ".xml" on the output page to consider the page 
content to be XML, IIRC. IE 7 may be less broken, I haven't tried it 
much yet.

regards
  Steve

-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From DustanGroups at gmail.com  Thu Aug  9 18:33:52 2007
From: DustanGroups at gmail.com (Dustan)
Date: Thu, 09 Aug 2007 22:33:52 -0000
Subject: programmatically define a new variable on the fly
In-Reply-To: <1186698608.818912.180370@e16g2000pri.googlegroups.com>
References: <1186697500.024593.303820@x35g2000prf.googlegroups.com>
	<1186698608.818912.180370@e16g2000pri.googlegroups.com>
Message-ID: <1186698832.142206.301310@i13g2000prf.googlegroups.com>

On Aug 9, 5:30 pm, Dustan <DustanGro... at gmail.com> wrote:
> given the
> variables data (the dictionary), name (in your example, 'g') and
> *size* (in your example, 99), you can add it  data as shown:

erm... make that:

given the variables data (the dictionary), name (in your example, 'g')
and size (in your example, 99), you can add it to data as shown:



From ptmcg at austin.rr.com  Tue Aug  7 09:24:24 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 07 Aug 2007 06:24:24 -0700
Subject: step through .py file in a .NET application written in C# in
	Visual Studio
In-Reply-To: <1186438925.541501.235800@g4g2000hsf.googlegroups.com>
References: <1186438925.541501.235800@g4g2000hsf.googlegroups.com>
Message-ID: <1186493064.496160.296460@b79g2000hse.googlegroups.com>

On Aug 6, 5:22 pm, Bo <bohema... at gmail.com> wrote:
> Hello All,
>
> I am experimenting IronPython in Visual Studio.  Here is what I have,
> what I did and what I want
>
> 1.  I have installed Visual Studio SDK 4.0 according to this bloghttp://blogs.msdn.com/aaronmar/archive/2006/02/16/a-bit-more-on-ironp...
>
> If I run Visual Studio under Experimental Hive, a Python file opened
> is color coded.
>
> 2.  Also, my computer has apparently installed some IronPython DLL
> because my Visual Studio can recoginize the following class:
> IronPython.Hosting.PythonEngine.
>
> If I declare something like the following in Visual Studio:
>
> public static class MyPythonClass {
>    private static IronPython.Hosting.PythonEngine   MY_ENGINE;
>   //suppose I have created an instance of PhythonEngine and assigned
> to MY_ENGINE
>    ............
>
> }
>
> If I do "Go to Definition" of PythonEngine, I can navigate to the
> Definition of PythonEngine, but it is from MetaData.
>
> 3.  In my .NET application (written in C#) , I can invoke the
> execution of an external python file using something like:
> MyPythonClass.MY_ENGINE.ExecuteFile("myPythonFileWithAbsolutePath.py")
>
> The python file (myPythonFileWithAbsolutePath.py) can be executed all
> right, but I want to step through it to debug it.  Any suggestions on
> how to do it?
>
> Thanks a bunch.
>
> Bo

Um, make sure you compile with debug?

I have coded in Boo, which is very Python-like, and it will step
through the debugger just fine, so IP should do the same in theory.
But I've not used IP, so all I can give are generic "are you sure it's
plugged in?" type of suggestions.

Hmm, upon rereading your post, I see that you want the debugger to
step through a separate file that was executed using ExecuteFile.
Unless there are some debug options on ExecuteFile, I'd say your
chances are slim, since the file being executed is not really part of
the image being debugged.  You could also try explicitly invoking the
debugger from within the file that you are loading, using (this works
from Boo):

    System.Diagnostics.Debugger.Launch()
    System.Diagnostics.Debugger.Break()


-- Paul



From http  Mon Aug 20 23:48:10 2007
From: http (Paul Rubin)
Date: 20 Aug 2007 20:48:10 -0700
Subject: Retrieving a variable's name.
References: <1187658202.236626.93600@50g2000hsm.googlegroups.com>
Message-ID: <7xk5rpblad.fsf@ruckus.brouhaha.com>

rodrigo <rodrigo.cr at gmail.com> writes:
> How would I go about retrieving a variable's name (not its value)? I
> want to write a function that, given a list of variables, returns  a
> string with each variable's name and its value, like:
> 
> a: 100
> b: 200
> 
> I get the feeling this is trivial, but I have been unable to find an
> answer on my own.

Why do you want to do that?  The reason you haven't found an answer is
that it's almost certainly not the right solution to whatever problem
you're trying to solve.

   '\n'.join('%s: %s'%(k,v) for k,v in locals().iteritems())

(untested) does something like what you're asking but I don't
advise it.  You should probably use a dictionary object instead.


From fabioztessitore at libero.it  Wed Aug 29 16:44:23 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 29 Aug 2007 20:44:23 GMT
Subject: cgi
References: <fb4a57$ojf$1@ss408.t-com.hr>
	<46d5c01b$0$36438$4fafbaef@reader5.news.tin.it>
	<fb4gpa$bb0$1@ss408.t-com.hr>
Message-ID: <46d5daa7$0$36441$4fafbaef@reader5.news.tin.it>

Are you sure your script is in the right dir?

On my home computer, php script will work in /var/www but my python 
script need an other dir to work properly (i don't remember which now ;-))

bye



From aleax at mac.com  Sat Aug 11 01:17:09 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 10 Aug 2007 22:17:09 -0700
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
	<46B8626A.2070303@bigfoot.com>
	<mailman.1726.1186537161.22759.python-list@python.org>
	<5hsoi3F3mlni2U1@mid.individual.net>
	<mailman.1737.1186577596.22759.python-list@python.org>
	<5hv705F3mk67nU1@mid.individual.net>
Message-ID: <1i2nhnv.2y00l5173lfbbN%aleax@mac.com>

greg <greg at cosc.canterbury.ac.nz> wrote:

> Steve Holden wrote:
> 
> > For some reason your reply got right up my nose,
> 
> I'm sorry about that. Sometimes it's hard to judge the
> level of experience with Python that a poster has. In

Because of this, a Google search for

  "<name> <surname>" python

may sometimes help; when you get 116,000 hits, as for "Steve Holden"
python, that may be a reasonable indication that the poster is one of
the world's Python Gurus (in fact, the winner of the 2007 Frank WIllison
Award -- congratulations, Steve!!!).


Alex


From martin at v.loewis.de  Sun Aug  5 17:20:14 2007
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Sun, 05 Aug 2007 23:20:14 +0200
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <877io9soa1.fsf@pobox.com>
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com>
Message-ID: <46B63F0E.8030208@v.loewis.de>

>> I think you misunderstood. It's not a design goal that code works
>> without modifications, yet most reasonable code will even without
>> that being an explicit goal.
> 
> I think the design goals have been fairly clear.  What hasn't been
> clear (to me, at least) is the practical question of the feasibility
> of code working unchanged on both 2.6 and 3.0.
> 
> http://www.python.org/dev/peps/pep-3000/
> 
> """There is no requirement that Python 2.6 code will run unmodified on
> Python 3.0. Not even a subset. (Of course there will be a tiny subset,
> but it will be missing major functionality.)"""

That's a different statement, though: It is likely that code will not
run unmodified on 3k. For example, print is now a statement, and
many many modules use that statement somewhere; they break in 3k.

However, it *is* a design goal to make 2.6 so that transition to
3k becomes simpler. That's not a 3k feature, but a 2.6 one.

> Though certainly neither quote is precise enough to pin it down
> formally, certainly the tone of the first quote (from the Wikipedia
> article) to my ear makes it sound like (at minimum!) it will be
> practical for most projects, if they do the work to support both 3.0
> and 2.6, to run simultaneously on 2.6 and 3.0 without use of a
> translation tool.  The second quote makes it sound like that will be
> highly impractical.  That picture is reinforced by what follows (in
> PEP 3000):
> 
> """
> The recommended development model for a project that needs to support
> Python 2.6 and 3.0 simultaneously is as follows:

That's Guido's recommendation, yes: use the 2to3 tool.

There are certainly projects for which this might be the only reasonable
strategy. However, whether that will be the *common* strategy remains
to be seen. I personally believe that many projects won't need the 2to3
tool, if they are willing to compromise on the notations used in the
source code.

> So which is it?

Both.

> That is, will it be practical for most projects to
> support 2.6 and 3.0 simultaneously, from the same codebase, without
> relying on translation tools?

That remains to be seen. I believe it will be, yes. Only when people
start trying we will actually know. Personal preference will vary
across projects; some will use the conversion tool even though they
could have come up with a single-source solution, others will fight
for a single-source solution even though life would have been much
simpler with the conversion tool.

> I'm assuming the practicalities of this
> *are* clear by now to the Python 3 developers -- is that right?

Not at all (at least now to me). I know what kind of changes *I*
regularly do to make code run in 3k, namely, put parentheses around
into the print statements. I can live with that. Whether it is
practical to run, say, Django unmodified, I don't know - I have
not looked into Django with that much detail, let alone tested
whether it will work.

Note that I'm primarily talking about pure Python here; for
C code, you can get a single-source version only with a lot
of #ifdefs (but again, I believe it is practical to make it
work that way).

> It
> seems to me that if I don't understand what the Python 3 developers
> expect the practicalities to be, most other interested people won't
> either ("interested" in the opposite sense to "disinterested" rather
> than to "uninterested").

I think comp.lang.python is then the wrong place to find out; the py3k
list likely reaches more of these developers. OTOH, I don't know whether
they all want to participate in a survey of their expectations...

Rather than studying people's opinions, why don't you try to port your
own projects to 3k, and report whether you found it practical to use
a single source (assuming you would prefer such a solution for your
own project)?

Regards,
Martin


From ianare at gmail.com  Mon Aug 13 01:06:51 2007
From: ianare at gmail.com (=?iso-8859-1?B?aWFuYXLp?=)
Date: Mon, 13 Aug 2007 05:06:51 -0000
Subject: wx.ListBox drag and drop
Message-ID: <1186981611.589404.117770@l70g2000hse.googlegroups.com>

Hey all,

I see plenty of drag and drop examples but they are all for
wx.ListCtrl. Anyone know of examples or tutorials for wx.ListBox?
Specifically, I would like to be able to drag a selection from one
ListBox to another.

Thanks in advance,

- ianar?



From bbxx789_05ss at yahoo.com  Thu Aug  9 12:03:58 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Thu, 09 Aug 2007 09:03:58 -0700
Subject: wxPython before MainLoop
In-Reply-To: <13bl9a75laqcm70@corp.supernews.com>
References: <13bl9a75laqcm70@corp.supernews.com>
Message-ID: <1186675438.241975.292360@b79g2000hse.googlegroups.com>

On Aug 8, 11:25 pm, "[david]" <da... at nospam.spam> wrote:
> I'd like to refresh the display before I start the main loop.
>
> I have code like this:
>
> app = App()
> app.Show()
> app.long_slow_init()
> app.MainLoop()
>
> The main frame partly loads at Show, but because the mainloop has not
> started yet, the display does not update until long_slow_init() finishes.
>
> Alternatively, I could code
>
> app = App()
> app.long_slow_init()
> app.Show()
> app.MainLoop()
>
> Which would give me a crisp Show, but there would be a long slow wait
> before the app showed any activity at all. I would need a splash screen.
>
> I'd rather not have a splash screen (and I don't know how anyway). I'd
> like to just make app.Show() finish correctly before running
> long_slow_init.
>
> Is there a wx internal method that I can use to give Windows the
> opportunity to finish painting the frame before I run long_slow_init()?
>
> Or is there a better idea?
>
> (david)

I don't see my original post, so here it is again....


You can use another thread to execute long_slow_init():

--------------
import wx
import threading
import time

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, "My Window")

        panel = wx.Panel(self, -1)
        button = wx.Button(panel, -1, "click me, quick!", pos=(40,
40))
        self.Bind(wx.EVT_BUTTON, self.onclick)

    def onclick(self, event):
        print "button clicked"

    def receive_result(self, result):
        print "Hey, I'm done with that long, slow initialization."
        print "The result was:", result


class MyApp(wx.App):
    def __init__(self):
        wx.App.__init__(self, redirect=False)


    def OnInit(self):  #called by wx.Python
        the_frame = MyFrame()
        the_frame.Show()

        t = MyThread(the_frame)
        t.start()  #calls t.run()

        return True

class MyThread(threading.Thread):
    def __init__(self, a_frame):
        threading.Thread.__init__(self)
        self.frame_obj = a_frame

    def run(self):
        result = self.long_slow_init()

        wx.CallAfter(self.frame_obj.receive_result, result)
        #CallAfter() calls the specified function with the
        #specified argument when the next pause in execution
        #occurs in this thread:

    def long_slow_init(self):
        print "starting long_slow_init()..."
        time.sleep(6)
        result = 20.5
        return result


app = MyApp()
app.MainLoop()



From tooru_honda at fast-mail.org  Fri Aug 24 03:38:51 2007
From: tooru_honda at fast-mail.org (tooru honda)
Date: Fri, 24 Aug 2007 15:38:51 +0800
Subject: Does shuffle() produce uniform result ?
Message-ID: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>

Hi,

I have read the source code of the built-in random module, random.py.  
After also reading Wiki article on Knuth Shuffle algorithm, I wonder if 
the shuffle method implemented in random.py produces results with modulo 
bias.

The reasoning is as follows: Because the method random() only produces 
finitely many possible results, we get modulo bias when the number of 
possible results is not divisible by the size of the shuffled list.

1. Does shuffle() produce uniform result ?

2. If not, is there a fast and uniform shuffle() available somewhere ?

Thanks !

-tooru honda


From ocollioud at gmail.com  Wed Aug 22 03:11:39 2007
From: ocollioud at gmail.com (olive)
Date: Wed, 22 Aug 2007 07:11:39 -0000
Subject: Server-side scripting in python
In-Reply-To: <1187755436.972359.293360@i13g2000prf.googlegroups.com>
References: <1187614732.519547.296020@j4g2000prf.googlegroups.com>
	<gi6rp4-mes.ln1@lairds.us>
	<1187755436.972359.293360@i13g2000prf.googlegroups.com>
Message-ID: <1187766699.291306.3490@z24g2000prh.googlegroups.com>

On 22 ao?t, 06:03, Nagarajan <nag... at gmail.com> wrote:
> I wanted to explore web programming facet of python. The problem at my
> hand is to develop an email web client.

I would do that with the help of Django (www.djangoproject.com
groups.google.com/group/django-users) for the server side and JQuery
(www.jquery.com groups.google.com/group/jquery-en) for the client
side.

Olive.




From samushack at gmail.com  Sat Aug 25 21:36:15 2007
From: samushack at gmail.com (samushack at gmail.com)
Date: Sat, 25 Aug 2007 18:36:15 -0700
Subject: simple spider in python
In-Reply-To: <1187902164.596545.101050@q3g2000prf.googlegroups.com>
References: <1187876014.845912.236690@e9g2000prf.googlegroups.com>
	<1187879398.007797.128510@i13g2000prf.googlegroups.com>
	<1187880988.813113.20350@l22g2000prc.googlegroups.com>
	<sll0q4-79t.ln1@lairds.us>
	<1187890751.871660.275320@z24g2000prh.googlegroups.com>
	<1187902164.596545.101050@q3g2000prf.googlegroups.com>
Message-ID: <1188092175.007320.271800@57g2000hsv.googlegroups.com>

On Aug 23, 4:49 pm, gmcalen... at gmail.com wrote:
> well, i think that they deserve people moving toward yahoo's API...
> check this out:http://pysearch.sourceforge.net/
> it's basically the same thing as pygoogle BUT working with google's
> competitor. it seems like internet has its own built-in antibodyes!
> ^__^
>
> cheers!

Had not seen this project before. Looks helpful, thanks! (If only
Yahoo! Search did not suck in comparison to Google's..., but better
than nothing:-)



From skip.montanaro at gmail.com  Tue Aug 14 06:46:55 2007
From: skip.montanaro at gmail.com (Skip Montanaro)
Date: Tue, 14 Aug 2007 03:46:55 -0700
Subject: Best programs written completly in Python
In-Reply-To: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
Message-ID: <1187088415.483615.114170@m37g2000prh.googlegroups.com>

On Aug 5, 5:14 am, Franz Steinh?usler <franz.steinhaeus... at gmx.at>
wrote:
> Hello NG,
>
> wWhat are the best programs in your opinion, written entirly
> in pyhton, divided into categories like:
> a) Games
> b) Utilities/System
> c) Office
> d) Web/Newsreader/Mail/Browser
> ...

Not mentioned so far, here or on the Applications wiki page, is
SpamBayes,
an excellent spam filter: <http://www.spambayes.org/>.  It supports
POP3 and
IMAP, and has a plugin for Outlook.  Another group has improved
SpamBayes
integration with Thunderbird by developing a TBird extension called
ThunderBayes.

Skip





From pkharpenn at shaw.ca  Mon Aug  6 21:50:21 2007
From: pkharpenn at shaw.ca (Karin and Patrick)
Date: Mon, 06 Aug 2007 20:50:21 -0500
Subject: The Secret Way To Get Wealthy
Message-ID: <000201c7d895$50ab9fa0$6501a8c0@wp.shawcable.net>

Please send me the information on this program.
 
Thanks

Patrick
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070806/91e7a90f/attachment.html>

From horpner at yahoo.com  Mon Aug 27 14:44:18 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 27 Aug 2007 18:44:18 GMT
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csoronscqp7d2@corp.supernews.com>
	<1188090322.663217.102750@22g2000hsm.googlegroups.com>
	<13d4bucfm4m1lc4@corp.supernews.com>
	<mailman.13.1188182594.28954.python-list@python.org>
	<13d4gjm3qq0lt7c@corp.supernews.com>
	<slrnfd5kt4.b0.horpner@FIAD06.norwich.edu>
Message-ID: <slrnfd65ra.1r4.horpner@FIAD06.norwich.edu>

On 2007-08-27, Neil Cerutti <horpner at yahoo.com> wrote:
> This sort of suggests a direct solution:
>
> for i in xrange(self.parent.GetPageCount()):
>   if i >= self.parent.GetPageCount():
>     break
>   # do stuff
>
> At least that way you're spared the manual manipulation of i.

On second thought, that last suggestion is flawed, as a growing
page count would be ignored. Please ignore.

-- 
Neil Cerutti
Whenever I see a homeless guy, I always run back and give him money, because I
think: Oh my God, what if that was Jesus? --Pamela Anderson


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  9 06:50:50 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 09 Aug 2007 12:50:50 +0200
Subject: Help with Dictionaries and Classes requested please.
In-Reply-To: <46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <46baf183$0$433$426a74cc@news.free.fr>

special_dragonfly a ?crit :
(snip)
> I've managed to solve the problem, I really was just being a dunce. Here's 
> how incase anyone is wondering:
> 
> class MyClass:
>     def __init__(self):
>         name=""
> dict={}
> dict[0]=[]
> dict[0].append(MyClass())
> dict[0][0].name="Hello"
> print dict[0][0].name
> 
> I'm sorry if I've wasted anyones time, although if there's a better way of 
> doing the above I'd still be interested to know.

# unless you need pre 2.3.x compat, better to use newstyle classes
class MyClass(object):
   # use the initializer to initialize your instance
   def __init__(self, name=''):
     # the use of 'self' is mandatory, else you only have a local var
     self.name = name

# don't use builtin names as identifiers - unless you really want to
# shadow the builtins
d = {0:[MyClass('hello')}
d[0].append(MyClass('goodbye'))
d.setdefault(1, []).append(MyClass('Yo'))
print d

HTH


From http  Mon Aug  6 11:20:20 2007
From: http (Paul Rubin)
Date: 06 Aug 2007 08:20:20 -0700
Subject: Tkinter or wxpython?
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<mailman.1677.1186412323.22759.python-list@python.org>
Message-ID: <7xlkcopu4r.fsf@ruckus.brouhaha.com>

"Chris Mellon" <arkanes at gmail.com> writes:
> No native look and feel - constrained by the browser.

Might or might not matter for the application, especially considering
that tkinter is part of the discussion.

> No control over browser UI idioms. I had to write this post twice
> because the text control lost focus and I hit backspace, going back in
> the history and losing my work.

Sounds weird, I'm used to having stuff in text boxes stay in the
browser, and why did backspace have that effect anyway?

> No native integration - no "open file", no "browse the filesystem", no
> rich drag and drop, no copy/paste.

File i/o and file system browsing are available from javascript if the
user grants permission.  File system browsing for the limited purpose
of file upload is available in regular html.  Copy/paste of ordinary
text is always available.  However, this type of requirement is what I
mean by a "good reason" to write a desktop gui.  It applies to some
applications, not all.

> No or poor dialogs. Poor multiple window support.

Might or might not matter depending on the application.  Most dialogs
can be done with html.  Multiple windows are evil most of the time,
and should instead by done with multiple panes or cells in a single
window.

> More platforms to develop on and test with.

Compared to a desktop app?  I don't think so.

> Limited to CSS box model for layout.

Might or might not matter depending on the application.  If you're
doing a consumer app that has to look slick, you have no choice but to
use something like wxwidgets (tkinter won't cut it either).  If you're
doing a special purpose office or industrial app, slickness isn't
important.  

> The web is a terrible application platform. There is not a single web
> application in existence which has even half the UI functionality of a
> rich client application. 

Some of us consider simple interfaces with consistent, familiar
(i.e. web) elements to be a good thing.  Fancy client interfaces are
ok if you feel you need to make a style statement, but are often
unnecessary if you just want to get something done.

> There are some (even many) applications for which the benefit of
> global access and easy deployment makes up for the lack in
> functionality, but statements like "At this point I think nobody
> should write desktop gui apps without a good reason" are simply
> ludicrously misguided.

Well, I don't say that good reasons don't exist, I just see a lot of
desktop apps that could be done just as well as web apps, i.e. for
those, the good reason didn't exist.


From khemkaamit at gmail.com  Tue Aug 21 09:28:25 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Tue, 21 Aug 2007 18:58:25 +0530
Subject: Logging module gives duplicate log entries
In-Reply-To: <1187702248.203917.188570@k79g2000hse.googlegroups.com>
References: <1187702248.203917.188570@k79g2000hse.googlegroups.com>
Message-ID: <1360b7230708210628q3b6adad1xbea25ac06b5e1cfd@mail.gmail.com>

On 8/21/07, Shiao <multiseed at gmail.com> wrote:
> Hi,
> I am getting duplicate log entries with the logging module.
>
> The following behaves as expected, leading to one log entry for each
> logged event:
>
> logging.basicConfig(level=logging.DEBUG, filename='/tmp/foo.log')
>
> But this results in two entries for each logged event:
>
> applog = logging.getLogger()
> applog.setLevel(logging.DEBUG)
> hdl = logging.FileHandler('/tmp/foo.log')
> applog.addHandler(hdl)
>

You need to remove the handler from the logging object

# remove the handler once you are done
applog.removeHandler(hdl)


Cheers,
amit.

----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in
Home Page: www.cse.iitd.ernet.in/~csd00377

Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.


From kyosohma at gmail.com  Mon Aug  6 14:43:36 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 06 Aug 2007 18:43:36 -0000
Subject: Importing * From a Package
In-Reply-To: <mailman.1675.1186409218.22759.python-list@python.org>
References: <mailman.1675.1186409218.22759.python-list@python.org>
Message-ID: <1186425816.527991.204760@i13g2000prf.googlegroups.com>

On Aug 6, 9:06 am, "Patrick Doyle" <wpds... at gmail.com> wrote:
> Reading through the Python tutorial, I got to section 6.4.1,
> "Importing * From a Package", which states:
>
> "If __all__ is not defined, the statement from Sound.Effects import *
> does not import all submodules from the package Sound.Effects into the
> current namespace; ..."
>
> It then goes on to state:
>
> "[It] imports whatever names are defined in the package [including]
> any submodules of the package that were explicitly loaded by previous
> import statements."
>
> I am curious to learn the rationale for this behavior, since it just
> caught me by surprise (hence the reason I was pouring over the
> tutorial document in such detail :-))
>
> Thus far, everything in Python has seemed very intuitive to me,
> however the behavior of "from package import *" baffles me.
>
> So I figured I'd ask -- why does Python behave this way.
>
> (And now, I'm going to do some code cleanup :-))
>
> --wpd

The only module I know of that most people tell you to do a "from x
import *" is Tkinter. I think that's pretty dumb myself. If you don't
want to type some module's name out, then do something like "import
Tkinter as tk".

Mike



From jeremy+complangpython at jeremysanders.net  Fri Aug 17 12:08:29 2007
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Fri, 17 Aug 2007 17:08:29 +0100
Subject: best GUI library for vector drawing program
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
Message-ID: <fa4h5t$ort$1@gemini.csx.cam.ac.uk>

chewie54 wrote:

> What would be the best cross-platform GUI library to use for a vector
> based CAD program ( something like Visio on Windows )   WxWidgets,
> Tk,   PyQt,  Java Swing,  Java SWT,????   I need the capibility to
> draw and edit in a window that looks like a page of paper so WYSIWYG
> is very important,  and I need to save the drawings in vector based
> file formats like PS, EPS,  SVG, as well as image formats like jpg,
> png, and gif.  Also, the images need to be high resolution so that
> they can be pasted into various other programs in Windows OS,  and
> Linux OS,  and the Mac OS.

PyQt/Qt4 is capable of that (SVG export was added in Qt4.3).

I have a graph drawing application based around it (Veusz).

If you base everything around QPainter, you'll be able to write to any of
those output formats (including eps and pdf), and bitmaps. Antialiasing is
optional for bitmap formats.

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From steveo at syslang.net  Thu Aug 23 16:48:51 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Thu, 23 Aug 2007 16:48:51 -0400 (EDT)
Subject: Problem with dynamic creation of classes.
Message-ID: <alpine.LFD.0.999.0708231522070.1598@saturn.syslang.net>

I have a base class B and a derived class D which inherits from B. I also 
have a D2 class which inherits from D. D is used as a base class for most 
of my generated classes. I have a "special" class which inherits from D2 
because I need to override a couple of its methods. Anything based on D2 
will inherit Encode and Decode from B.

class D(b.B):
     def __init__(self, data, timestamp = None):
         b.B.__init__(self, data)
         self.timestamp = timestamp

class D2( D ):
     def __init__(self, data, timestamp = None):
         DS.__init__(self, data, timestamp)
     def Decode(self):
         pass
     def Encode(self):
 	pass

The generated classes come from this loop:

     for m in mdefs:
         mdef = mdefs[m]
         name = mdef['name'] + fbase
         if mdef.has_key('baseclass'):
             base_class_seq = mdef['baseclass']
         else:
             base_class_seq = DEFAULT_BASE_CLASS
         nclass = new.classobj( name, base_class_seq, globals() )

base_class_seq is either going to be (D,) or (D2,)

After I get through the class generation, I want to say
     globals()['IFRAMED2'].Decode = dynDecode
     globals()['IFRAMED2'].Encode = dynEncode
for the one class that inherited from D2. If I do that, I find that *all* 
classes that call Encode or Decode are all calling dyn{En,De}code (which 
is exactly what I *don't* want).

So I looked at the id values after class generation.

     print 'IFRAMED2.Encode = ', IFRAMED2.Encode, id(IFRAMED2.Encode)
     print 'SNRMD.Encode = ', SNRMD.Encode, id(SNRMD.Encode)
     print 'IFRAMED2 = ', IFRAMED2, id(IFRAMED2)
     print 'SNRMD = ', SNRMD, id(SNRMD)
     IFRAMED2.Decode = dynDecode
     IFRAMED2.Encode = dynEncode
     print 'IFRAMED2.Encode = ', IFRAMED2.Encode, id(IFRAMED2.Encode)
     print 'SNRMD.Encode = ', SNRMD.Encode, id(SNRMD.Encode)

Here's the output:

IFRAMED2.Encode =  <unbound method IFRAMED2.Encode> 1100623660
SNRMD.Encode =  <unbound method SNRMD.Encode> 1100623660
IFRAMED2 =  d.IFRAMED2 1076299644
SNRMD =  d.SNRMD 1103202364
IFRAMED2.Encode =  <unbound method IFRAMED2.dynEncode> 1100623660
SNRMD.Encode =  <unbound method SNRMD.dynEncode> 1100623660

So it looks like the IFRAMED2 class which inherits from D2 is starting out 
with the same id value for Encode as SNRMD which inherits from D, even 
though D2 defines its own Encode method.

Is it me of is it the interpreter doing something wrong?

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From erik at myemma.com  Tue Aug 28 11:08:06 2007
From: erik at myemma.com (Erik Jones)
Date: Tue, 28 Aug 2007 10:08:06 -0500
Subject: Python Classes
In-Reply-To: <eb79828c0708272204y3b9f6503x843c66eb2ecb685b@mail.gmail.com>
References: <eb79828c0708272204y3b9f6503x843c66eb2ecb685b@mail.gmail.com>
Message-ID: <8AC0DE08-89C7-4647-93FE-CC9ED6102C98@myemma.com>

On Aug 28, 2007, at 12:04 AM, Lamonte Harris wrote:

> How come you have to set the initialized created variables to equal  
> the parameters, shouldn't that be default?
>
> class testing:
>          def __init__(self,testing):
>                    self.testing = testing
> x = testing("testing")
> print x.testing
>
>
> How come self.testing = testing
>
> Can someone explain that in more detail, just confused on why you  
> have to set it up like that.
> -- 

Simple Answer:

Because language should never set variable values "by default".   
That's what programmers are for.  There may be application domains  
where *some* defaulting behavior makes sense, but that's what  
frameworks and DSLs are for.

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From borreguero at gmail.com  Thu Aug 23 14:46:47 2007
From: borreguero at gmail.com (jmborr)
Date: Thu, 23 Aug 2007 18:46:47 -0000
Subject: how to select between two file libraries with same name?
Message-ID: <1187894807.228812.266270@q5g2000prf.googlegroups.com>

Imagine my file one.py contains the statement
import two
If there's a two.py in same directory as one.py, then this file will
be loaded. However, I want to load a different file named also two.py,
say file ~username/mypythonlib/two.py
How can I select between the two two.py files ?
-jose



From arkanes at gmail.com  Wed Aug  1 12:16:21 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 1 Aug 2007 11:16:21 -0500
Subject: What is the "functional" way of doing this?
In-Reply-To: <46AF80AA.7030809@bigfoot.com>
References: <1185835690.530367.66600@m37g2000prh.googlegroups.com>
	<1185838434.596591.132640@d30g2000prg.googlegroups.com>
	<7x3az5wjfa.fsf@ruckus.brouhaha.com>
	<1185839713.412656.242950@i13g2000prf.googlegroups.com>
	<mailman.1370.1185883314.22759.python-list@python.org>
	<pan.2007.07.31.16.57.01.747261@REMOVE.THIS.cybersource.com.au>
	<46AF80AA.7030809@bigfoot.com>
Message-ID: <4866bea60708010916p6d8b89e7x447ff78a827c2af0@mail.gmail.com>

On 7/31/07, Ricardo Ar?oz <ricaraoz at gmail.com> wrote:
> Steven D'Aprano wrote:
> > On Tue, 31 Jul 2007 09:01:42 -0300, Ricardo Ar?oz wrote:
> >
> >> Considering I am a beginner I did a little test. Funny results too. The
> >> function I proposed (lists1.py) took 11.4529998302 seconds, while the
> >> other one (lists2.py) took 16.1410000324 seconds, thats about 40% more.
> >> They were run in IDLE from their own windows (F5).
> >
> > [snip code]
> >
> > You may find that using the timeit module is better than rolling your own
> > timer.
> >
> >>>> def recursive_func(n):
> > ...     if n > 0:
> > ...             return [n % 26] + recursive_func(n/26)
> > ...     else:
> > ...             return []
> > ...
> >>>> def generator_func(n):
> > ...     def mseq(n):
> > ...             while n > 0:
> > ...                     n, a = divmod(n, 26)
> > ...                     yield a
> > ...     return list(mseq(n))
> > ...
> >>>> import timeit
> >>>> N = 10**6+1
> >>>> timeit.Timer("recursive_func(N)",
> > ... "from __main__ import N, recursive_func").repeat()
> > [16.48972487449646, 17.000514984130859, 16.520529985427856]
> >>>> timeit.Timer("generator_func(N)",
> > ... "from __main__ import N, generator_func").repeat()
> > [27.938560009002686, 28.970781087875366, 23.977837085723877]
> >
> >
> > If you're going to compare speeds, you should also test this one:
> >
> >>>> def procedural_func(n):
> > ...     results = []
> > ...     while n > 0:
> > ...         n, a = divmod(n, 26)
> > ...         results.append(a)
> > ...     return results
> > ...
> >>>> timeit.Timer("procedural_func(N)",
> > ... "from __main__ import N, procedural_func").repeat()
> > [15.577107906341553, 15.60145378112793, 15.345284938812256]
> >
> >
> > I must admit that I'm surprised at how well the recursive version did, and
> > how slow the generator-based version was. But I'd be careful about drawing
> > grand conclusions about the general speed of recursion etc. in Python from
> > this one single example. I think this is simply because the examples tried
> > make so few recursive calls. Consider instead an example that makes a few
> > more calls:
> >
> >>>> N = 26**100 + 1
> >>>>
> >>>> timeit.Timer("recursive_func(N)",
> > ... "from __main__ import N, recursive_func").repeat(3, 10000)
> > [7.0015969276428223, 7.6065640449523926, 6.8495190143585205]
> >>>> timeit.Timer("generator_func(N)",
> > ... "from __main__ import N, generator_func").repeat(3, 10000)
> > [3.56563401222229, 3.1132731437683105, 3.8274538516998291]
> >>>> timeit.Timer("procedural_func(N)",
> > ... "from __main__ import N, procedural_func").repeat(3, 10000)
> > [3.3509068489074707, 4.0872640609741211, 3.3742849826812744]
> >
> >
>
> Yup! As soon as the size of the list increases the generator function
> gets better (50% in my tests). But it's interesting to note that if the
> list is within certain limits (I've tested integers (i.e. 2,100,000,000
> => 7 member list)) and you only vary the times the funct. is called then
> the recursive one does better.
>
>

Not especially surprising. Suspending and resuming a generator is
naturally more expensive than a single function call. The advantages
of generators are time/space tradeoffs, greater expressiveness, and
state preservation (not used here).


From horpner at yahoo.com  Tue Aug  7 14:18:43 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 07 Aug 2007 18:18:43 GMT
Subject: re.sub does not replace all occurences
References: <1186507704.440408.20630@57g2000hsv.googlegroups.com>
Message-ID: <slrnfbhd37.268.horpner@FIAD06.norwich.edu>

On 2007-08-07, Christoph Krammer <redtiger84 at googlemail.com> wrote:
> Hello everybody,
>
> I wanted to use re.sub to strip all HTML tags out of a given string. I
> learned that there are better ways to do this without the re module,
> but I would like to know why my code is not working. I use the
> following:
>
> def stripHtml(source):
>   source = re.sub("[\n\r\f]", " ", source)
>   source = re.sub("<.*?>", "", source, re.S | re.I | re.M)
>   source = re.sub("&(#[0-9]{1,3}|[a-z]{3,6});", "", source, re.I)
>   return source
>
> But the result still has some tags in it. When I call the
> second line multiple times, all tags disappear, but since HTML
> tags cannot be overlapping, I do not understand this behavior.
> There is even a difference when I omit the re.I (IGNORECASE)
> option. Without this option, some tags containing only capital
> letters (like </FONT>) were kept in the string when doing one
> processing run but removed when doing multiple runs.
>
> Perhaps anyone can tell me why this regex is behaving like
> this.

>>> import re
>>> help(re.sub)
Help on function sub in module re:

sub(pattern, repl, string, count=0)
    Return the string obtained by replacing the leftmost
    non-overlapping occurrences of the pattern in string by the
    replacement repl.  repl can be either a string or a callable;
    if a callable, it's passed the match object and must return
    a replacement string to be used.

And from the Python Library Reference for re.sub:

    The pattern may be a string or an RE object; if you need to
    specify regular expression flags, you must use a RE object,
    or use embedded modifiers in a pattern; for example,
    "sub("(?i)b+", "x", "bbbb BBBB")" returns 'x x'. 

    The optional argument count is the maximum number of pattern
    occurrences to be replaced; count must be a non-negative
    integer. If omitted or zero, all occurrences will be
    replaced. Empty matches for the pattern are replaced only
    when not adjacent to a previous match, so "sub('x*', '-',
    'abc')" returns '-a-b-c-'. 

In other words, the fourth argument to sub is count, not a set of
re flags.

-- 
Neil Cerutti


From cai.haibin at gmail.com  Thu Aug  2 04:27:02 2007
From: cai.haibin at gmail.com (james_027)
Date: Thu, 02 Aug 2007 08:27:02 -0000
Subject: a dict trick
In-Reply-To: <mailman.1492.1186042512.22759.python-list@python.org>
References: <1186036331.304916.304020@e9g2000prf.googlegroups.com>
	<mailman.1492.1186042512.22759.python-list@python.org>
Message-ID: <1186043222.732234.152550@d30g2000prg.googlegroups.com>

Hi,

what if we're not dealing with dict? is there a pythonic way of doing
ternary? the bool ? x:y

Thanks
james



From bbxx789_05ss at yahoo.com  Fri Aug 17 01:30:19 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Thu, 16 Aug 2007 22:30:19 -0700
Subject: using super() to call two parent classes __init__() method
Message-ID: <1187328619.039289.244900@g4g2000hsf.googlegroups.com>

When I run the following code and call super() in the Base class's
__init__ () method,  only one Parent's __init__() method is called.


class Parent1(object):
    def __init__(self):
        print "Parent1 init called."
        self.x = 10

class Parent2(object):
    def __init__(self):
        print "Parent2 init called."
        self.y = 15

class Base(Parent1, Parent2):
    def __init__(self):
        super(Base, self).__init__()
        self.z = 20

b = Base()

--output:--
Parent1 init called.



From arkanes at gmail.com  Mon Aug  6 10:58:34 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 6 Aug 2007 09:58:34 -0500
Subject: Tkinter or wxpython?
In-Reply-To: <7xps204tin.fsf@ruckus.brouhaha.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
Message-ID: <4866bea60708060758t634d7b87va03213e85b6b0c90@mail.gmail.com>

On 06 Aug 2007 07:39:12 -0700, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> kyosohma at gmail.com writes:
> >  I've read that Tkinter doesn't scale well if you're writing complex
> > GUIs. I haven't been able to test this hypothesis though. However,
> > since I had to rewrite VBA apps into Python, to get the right "look
> > and feel" I needed the widgets that wxPython provided. Since I started
> > out with C++, I find wxPython better than Tkinter, but it's all pretty
> > subjective. Try them both!
>
> Tkinteger (dang, I always end up typing it that way, I won't even
> bother fixing the error) is easy to use for simple gui's, and it's
> part of the standard python distro which for me is a big advantage (no
> extra crap to download).  However, the widget set is rather ugly and
> doesn't blend in well with anyone's native widgets; the widget
> selection itself is rather narrow, and I think kyosohma may be right
> that it doesn't scale well to complex gui's.  I've looked at the code
> for IDLE's gui and it's terrifying.
>
> At this point I think nobody should write desktop gui apps without a
> good reason.  There is a fairly flexible and easy to program gui
> already running on almost every desktop, namely the web browser.
> Before you write a gui using some client side toolkit, ask yourself
> whether you can instead embed a web server in your application and
> write an HTML gui.  That approach is not always the answer, but it has
> considerable advantages when you can do it that way.

Some disadvantages of the web based platform:

No native look and feel - constrained by the browser.
No control over browser UI idioms. I had to write this post twice
because the text control lost focus and I hit backspace, going back in
the history and losing my work.
No native integration - no "open file", no "browse the filesystem", no
rich drag and drop, no copy/paste.
No or poor dialogs. Poor multiple window support.
More platforms to develop on and test with.
Limited to CSS box model for layout.


You can mitigate some of these constraints if you *require* the local
web browser technique, rather than supporting local or remote access.
You can mitigate more if you write your own browser host (along the
lines of the dashboard in OS X), but then you get to write 3
applications instead of one.

The web is a terrible application platform. There is not a single web
application in existence which has even half the UI functionality of a
rich client application. There are some (even many) applications for
which the benefit of global access and easy deployment makes up for
the lack in functionality, but statements like "At this point I think
nobody should write desktop gui apps without a good reason" are simply
ludicrously misguided.


From ptmcg at austin.rr.com  Tue Aug 28 23:06:47 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 28 Aug 2007 20:06:47 -0700
Subject: Newbie question - sorting a slice
In-Reply-To: <1188355395.424913.90480@19g2000hsx.googlegroups.com>
References: <1188355395.424913.90480@19g2000hsx.googlegroups.com>
Message-ID: <1188356807.796673.231820@y42g2000hsy.googlegroups.com>

On Aug 28, 9:43 pm, hwg <hwg... at yahoo.com> wrote:
> I've searched the group and didn't see the answer to this...
>
> Why doesn't this work?:
>
> >>> letters = ['d', 'a', 'e', 'c', 'b']
> >>> letters[1:3].sort()
>
> This returns None.
>
> Why?  letters[1:3]  is  ['a', 'e', 'c']    Sorting that should return
> ['a', 'c', 'e']
>
> hwg

There are a couple of flaws in your example.

letters[1:3] is not ['a', 'e', 'c'], but is just ['a','e'].  The
elements of a slice start with the lower-bound INclusive (zero-based,
so this is 'a'), up to the upper bound EXclusive (up to, but NOT
INCLUDING 'c').  The slice returns a copy of the selected elements.

.sort() does an in-place sort, and returns None.  You may instead use
the builtin function sorted(), as in:

sorted(letters[1:4])

which in fact DOES return ['a', 'c', 'e'].

What your example had done was:
1. choose 2 elements of a list and copy them to a temporary list
2. sort the list in place
3. return None
4. discard the temporary list, since all references to it were gone

For remedial study:
- study notation for slices
- study the difference between list.sort() and sorted()

-- Paul



From richardjones at optushome.com.au  Mon Aug 20 05:52:45 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Mon, 20 Aug 2007 19:52:45 +1000
Subject: Call for advice on how to start PyOpenGL!
References: <1187589198.616866.280500@j4g2000prf.googlegroups.com>
	<5it40oF3qmpojU1@mid.uni-berlin.de>
Message-ID: <46c9646d$0$31115$afc38c87@news.optusnet.com.au>

Diez B. Roggisch wrote:
> math2life wrote:
> 
>> I work with python for two years, are familiar with image processing,
>> but beginner on PyOpenGL and OpenGL.
>> 
>> Any advice appreciated!
> 
> You should check out the pyweek (http://www.pyweek.org/). There you find
> pygame & OpenGL-based games, of a comprehensible size.

Also, there's plenty of good opengl tutorials on the web. They all translate
pretty easily into Python if they're not in Python already. For example:

http://nehe.gamedev.net

I highly recommend pyweek as a way of focusing on your learning task :)


     Richard



From andrewbl at aughr.com  Fri Aug 17 00:34:35 2007
From: andrewbl at aughr.com (Andrew Bloomgarden)
Date: Thu, 16 Aug 2007 21:34:35 -0700
Subject: Subprocess & ffmpeg
Message-ID: <B595517F-A6F1-49BC-A2BF-115EDDDF54E1@aughr.com>

Hi, I'm having a problem with the subprocess module. I'm using it to  
run ffmpeg with the following command, where a_cmd is the command  
string.

proc = subprocess.Popen 
(a_cmd,shell=True,stdout=subprocess.PIPE,universal_newlines=True,stderr= 
subprocess.STDOUT,stdin=subprocess.PIPE)

Then, I'm trying to have access to the output while it's running.  
Just as a test, I used the following:

for line in proc.stdout:
	print line

It doesn't print out anything until ffmpeg is done executing. Now,  
this works with mencoder, but I have no idea why it won't work with  
ffmpeg.

Does anyone know why this is happening?

-- 
Andrew Bloomgarden
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From ldo at geek-central.gen.new_zealand  Mon Aug  6 22:33:30 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Tue, 07 Aug 2007 14:33:30 +1200
Subject: regexp problem in Python
References: <1186177312.117581.129910@d55g2000hsg.googlegroups.com>
Message-ID: <f98lhb$lqm$2@lust.ihug.co.nz>

In message <1186177312.117581.129910 at d55g2000hsg.googlegroups.com>, Ehsan
wrote:

> I use this pattern :
> "http.*?\.(wmv|3gp).*""
> 
> but it returns only 'wmv' and '3gp' instead of "http://www.2shared.com/
> download/1716611/e2000f22/Jadeed_Mlak14.wmv?
> tsid=20070803-164051-9d637d11"

What's the actual Python code that uses this regexp?

My guess is, you're not using the "group" method correctly in the returned
match object <http://docs.python.org/lib/match-objects.html>.


From kirby.urner at gmail.com  Sun Aug  5 17:04:45 2007
From: kirby.urner at gmail.com (kirby.urner at gmail.com)
Date: Sun, 05 Aug 2007 21:04:45 -0000
Subject: Google message munging (was: Live editing...)
In-Reply-To: <87r6moc4il.fsf@benfinney.id.au>
References: <1185914335.472511.172040@m37g2000prh.googlegroups.com>
	<87r6moc4il.fsf@benfinney.id.au>
Message-ID: <1186347885.245805.314690@q3g2000prf.googlegroups.com>


> What the blazes is Google doing with messages that such a high
> proportion of them come through in this painful-to-read double-wrapped
> format? I'm referring to the fact that the lines appear to have been
> wrapped at one length, and then each line broken again into a long and
> a short line.
>

I entirely agree with Ben Finney's remarks.  Painful for
an author to see a post mangled that way too, writers
being also readers.

Back to the original thread (sort of): I think the deeper
issue is the relationship between "shell" (REPL),
"debugger" (per WingIDE 101 for example) and "runtime"
ala Python just crunching through a .py file.

The OLPC people are pushing for exotic "live debugging"
and think Python is deficient in this regard, not as a
language so much as an environment (which Guido need take
no responsibility for, though he often has and does).

My tossing out of some ZODB-based solutions was mostly
just an ice-breaker.  I don't mind that it ended up
prompting discussions of formatting.

Anyway, back to thinking about iterator types:
http://mail.python.org/pipermail/edu-sig/2007-August/008168.html
( python.next() might trigger a fork/jump to a next "live"
interpreter, leaving behind "snake skin" or "ghost" interpreter
available for "live" interventions? ).

Kirby



From joel.granados at gmail.com  Tue Aug 21 06:00:52 2007
From: joel.granados at gmail.com (Joel Andres Granados)
Date: Tue, 21 Aug 2007 12:00:52 +0200
Subject: IDE for Python
Message-ID: <46CAB7D4.5070308@gmail.com>

Hello list:

I have tried various times to use an IDE for python put have always been 
disapointed.
I haven't revisited the idea in about a year and was wondering what the 
python people
use.
I have also found http://pida.co.uk/main as a possible solution.  Anyone 
tried it yet?

suggestions.
Regards
Joel Andres Granados
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From half.italian at gmail.com  Fri Aug 10 19:25:02 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: Fri, 10 Aug 2007 23:25:02 -0000
Subject: Threaded Design Question
In-Reply-To: <oMGdnd2xodjScCbbnZ2dnUVZ_uydnZ2d@comcast.com>
References: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
	<oMGdnd2xodjScCbbnZ2dnUVZ_uydnZ2d@comcast.com>
Message-ID: <1186788302.998913.76720@d30g2000prg.googlegroups.com>

On Aug 9, 9:45 pm, "Mark T" <nos... at nospam.com> wrote:
> <half.ital... at gmail.com> wrote in message
>
> news:1186683909.797328.68770 at i13g2000prf.googlegroups.com...
>
>
>
> > Hi all!  I'm implementing one of my first multithreaded apps, and have
> > gotten to a point where I think I'm going off track from a standard
> > idiom.  Wondering if anyone can point me in the right direction.
>
> > The script will run as a daemon and watch a given directory for new
> > files.  Once it determines that a file has finished moving into the
> > watch folder, it will kick off a process on one of the files.  Several
> > of these could be running at any given time up to a max number of
> > threads.
>
> > Here's how I have it designed so far.  The main thread starts a
> > Watch(threading.Thread) class that loops and searches a directory for
> > files.  It has been passed a Queue.Queue() object (watch_queue), and
> > as it finds new files in the watch folder, it adds the file name to
> > the queue.
>
> > The main thread then grabs an item off the watch_queue, and kicks off
> > processing on that file using another class Worker(threading.thread).
>
> > My problem is with communicating between the threads as to which files
> > are currently processing, or are already present in the watch_queue so
> > that the Watch thread does not continuously add unneeded files to the
> > watch_queue to be processed.  For example...Watch() finds a file to be
> > processed and adds it to the queue.  The main thread sees the file on
> > the queue and pops it off and begins processing.  Now the file has
> > been removed from the watch_queue, and Watch() thread has no way of
> > knowing that the other Worker() thread is processing it, and shouldn't
> > pick it up again.  So it will see the file as new and add it to the
> > queue again.  PS.. The file is deleted from the watch folder after it
> > has finished processing, so that's how i'll know which files to
> > process in the long term.
>
> > I made definite progress by creating two queues...watch_queue and
> > processing_queue, and then used lists within the classes to store the
> > state of which files are processing/watched.
>
> > I think I could pull it off, but it has got very confusing quickly,
> > trying to keep each thread's list and the queue always in sync with
> > one another.  The easiset solution I can see is if my threads could
> > read an item from the queue without removing it from the queue and
> > only remove it when I tell it to.  Then the Watch() thread could then
> > just follow what items are on the watch_queue to know what files to
> > add, and then the Worker() thread could intentionally remove the item
> > from the watch_queue once it has finished processing it.
>
> > Now that I'm writing this out, I see a solution by over-riding or
> > wrapping Queue.Queue().get() to give me the behavior I mention above.
>
> > I've noticed .join() and .task_done(), but I'm not sure of how to use
> > them properly.  Any suggestions would be greatly appreciated.
>
> > ~Sean
>
> Just rename the file.  We've used that technique in a similar application at
> my work for years where a service looks for files of a particular extension
> to appear in a directory.  When the service sees a file, in renames it to a
> different extension and spins off a thread to process the contents.
>
> -Mark T.

I ended up taking this route for the most part.  The worker thread
first moves the file to be processed into a temp directory, and the
watch thread never knows about it again.  I still had to implement my
StateQueue(Queue.Queue) so I could implement a function to return all
the items on the queue without popping them off.

Thanks all for your great ideas.  My current response to multi-
threading... PITA!

~Sean



From gagsl-py2 at yahoo.com.ar  Fri Aug 24 00:14:04 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 24 Aug 2007 01:14:04 -0300
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csi2tn49esmc3@corp.supernews.com>
Message-ID: <op.txjp1qy2x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 23 Aug 2007 23:54:14 -0300, bambam <david at asdf.asdf> escribi?:

> After examining your suggestion, I realised that another thing
> I am interested in could be generalised: I want the complement
> of the set of ports in pages, given a universal set in tempList.
> Ignoring the break condition for the moment, and my problem
> with int(port)/str(port), would you have offered a different solution
> if I had asked for the relative complement of a small set?
>
> a= ['a','b','c']
> b= ['b']
> c= a-b #set theoretic difference, a\b, a.~b, ['a','c']

If you want a set - just use a set:

py> a = set(['a','b','c'])
py> b = set(['b'])
py> c = a-b
py> c
set(['a', 'c'])

-- 
Gabriel Genellina



From aboudouvas at panafonet.gr  Sat Aug  4 19:11:30 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Sat, 04 Aug 2007 16:11:30 -0700
Subject: Eclipse/PyDev question.
In-Reply-To: <1186268730.360593.160410@22g2000hsm.googlegroups.com>
References: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>
	<S3Osi.173945$wG2.172679@newsfe17.lga>
	<1186268730.360593.160410@22g2000hsm.googlegroups.com>
Message-ID: <1186269090.403527.168030@22g2000hsm.googlegroups.com>

Ah, and i think that the working set of Eclipse is smaller now...



From prey at cesga.es  Thu Aug 30 09:20:15 2007
From: prey at cesga.es (Pablo Rey)
Date: Thu, 30 Aug 2007 15:20:15 +0200
Subject: SAXParseException: not well-formed (invalid token)
In-Reply-To: <46D6B9F6.2010402@web.de>
References: <fb6alc$pfj$1@news.cesga.es> <46D6B9F6.2010402@web.de>
Message-ID: <46D6C40F.4060105@cesga.es>

	Hi Stefan,

	The xml has specified an encoding (<?xml version="1.0" encoding="UTF-8" 
?>).

	About the possibility that you mention to recoding the input, could you 
let me know how to do it?. I am sorry I am starting with Python and I 
don't know how to do it.

	Thanks by your help.
	Pablo
		


On 30/08/2007 14:37, Stefan Behnel wrote:
> Pablo Rey wrote:
>>     I am getting the following error with a XML page:
>>
>>>   File "/home/prey/RAL-CESGA/bin/voms2users/voms2users.py", line 69,
>>> in getItems
>>>     d = minidom.parseString(xml.read())
>>>   File "/usr/lib/python2.2/site-packages/_xmlplus/dom/minidom.py",
>>> line 967, in parseString
>>>     return _doparse(pulldom.parseString, args, kwargs)
>>>   File "/usr/lib/python2.2/site-packages/_xmlplus/dom/minidom.py",
>>> line 954, in _doparse
>>>     toktype, rootNode = events.getEvent()
>>>   File "/usr/lib/python2.2/site-packages/_xmlplus/dom/pulldom.py",
>>> line 265, in getEvent
>>>     self.parser.feed(buf)
>>>   File "/usr/lib/python2.2/site-packages/_xmlplus/sax/expatreader.py",
>>> line 208, in feed
>>>     self._err_handler.fatalError(exc)
>>>   File "/usr/lib/python2.2/site-packages/_xmlplus/sax/handler.py",
>>> line 38, in fatalError
>>>     raise exception
>>> xml.sax._exceptions.SAXParseException: <unknown>:553:48: not
>>> well-formed (invalid token)
>>
>>> def getItems(page):
>>>     opener =urllib.URLopener(key_file=HOSTKEY,cert_file=HOSTCERT) ;
>>>     try:
>>>        xml = opener.open(page)
>>>     except:
>>>        return []
>>>
>>>     d = minidom.parseString(xml.read())
>>>     items = d.getElementsByTagName('item')
>>>     data = []
>>>     for i in items:
>>>        data.append(getText(i.childNodes))
>>>
>>>     return data
>>     The page is
>> https://lcg-voms.cern.ch:8443/voms/cms/services/VOMSCompatibility?method=getGridmapUsers
>> and the line with the invalid character is (the invalid character is the
>> final ? of Universit?):
>>
>> <item>/C=BE/O=BEGRID/OU=Physique/OU=Univesit? Catholique de
>> Louvain/CN=Roberfroid</item>
>>
>>
>>     I have tried several options but I am not able to avoid this
>> problem. Any idea?.
> 
> Looks like the page is not well-formed XML (i.e. not XML at all). If it
> doesn't specify an encoding (<?xml encoding="..."?>), you can try recoding the
> input, possibly decoding it from latin-1 and re-encoding it as UTF-8 before
> passing it to the SAX parser.
> 
> Alternatively, tell the page authors to fix their page.
> 
> Stefan


From ndbecker2 at gmail.com  Fri Aug 31 15:13:04 2007
From: ndbecker2 at gmail.com (Neal Becker)
Date: Fri, 31 Aug 2007 15:13:04 -0400
Subject: code check for modifying sequence while iterating over it?
Message-ID: <fb9p83$2oq$1@sea.gmane.org>

After just getting bitten by this error, I wonder if any pylint, pychecker
variant can detect this error?



From bbxx789_05ss at yahoo.com  Thu Aug 30 14:25:35 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Thu, 30 Aug 2007 11:25:35 -0700
Subject: gc.garbage
In-Reply-To: <46D692FC.4030805@v.loewis.de>
References: <1188467173.708043.44800@w3g2000hsg.googlegroups.com>
	<46D692FC.4030805@v.loewis.de>
Message-ID: <1188498335.633506.90050@q4g2000prc.googlegroups.com>

On Aug 30, 3:50 am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > gc.set_debug(gc.DEBUG_LEAK)
> > print gc.garbage
>
> > --output:--
> > []
> > gc: uncollectable <Dog 0x56e10>
> > gc: uncollectable <Cat 0x56e30>
> > gc: uncollectable <dict 0x58270>
> > gc: uncollectable <dict 0x43e40>
>
> gc.garbage is filled only after these messages
> are printed, not before. You need to add an explicit
> call to gc.collect() if you want to see what
> uncollectable garbage you have.
>
> Regards,
> Martin

Hi,

Thanks for the response.  I had a cut and paste error in my reply, so
here it is again with the corrections...

Now, if I run the code:

------------
import gc

class Cat(object):
    def __del__():
        pass

class Dog(object):
    def __del__():
        pass

def some_func():
    the_dog = Dog()
    the_cat = Cat()
    the_dog.cat = the_cat
    the_cat.dog = the_dog

some_func()

gc.set_debug(gc.DEBUG_LEAK)
gc.collect()
print gc.garbage
-----------

I get this output:

----------
gc: uncollectable <Dog 0x56e10>
gc: uncollectable <Cat 0x56e30>
gc: uncollectable <dict 0x58300>
gc: uncollectable <dict 0x43e40>
[<__main__.Dog object at 0x56e10>, <__main__.Cat object at 0x56e30>,
{'cat': <__main__.Cat object at 0x56e30>}, {'dog': <__main__.Dog
object at 0x56e10>}]
-----------

Why are there two entries in the list for each uncollectable
object(same addresses)?  Also, I haven't bound the names "cat" or
"dog" anywhere in my program.  What do those names mean in the list?

Doing some further testing, if I eliminate the __del__ methods:

-----------
import gc

class Cat(object):
    pass

class Dog(object):
    pass

def some_func():
    the_dog = Dog()
    the_cat = Cat()
    the_dog.cat = the_cat
    the_cat.dog = the_dog

some_func()

gc.set_debug(gc.DEBUG_LEAK)
gc.collect()
print gc.garbage
-------------------

I get this output:

-----
gc: collectable <Dog 0x56e10>
gc: collectable <Cat 0x56e30>
gc: collectable <dict 0x58270>
gc: collectable <dict 0x43e40>
[<__main__.Dog object at 0x56e10>, <__main__.Cat object at 0x56e30>,
{'cat': <__main__.Cat object at 0x56e30>}, {'dog': <__main__.Dog
object at 0x56e10>}]
-----

The docs say:

---------
garbage
A list of objects which the collector found to be unreachable but
could not be freed (uncollectable objects).
--------

Since debugging doesn't show any uncollectable objects, why isn't
gc.garbage empty?  The docs also say:

----
garbage
...By default, this list contains only objects with __del__() methods.
----

Does set_debug() change the default?



From dfabrizio51 at gmail.com  Fri Aug 17 10:04:46 2007
From: dfabrizio51 at gmail.com (chewie54)
Date: Fri, 17 Aug 2007 14:04:46 -0000
Subject: best GUI library for vector drawing program
In-Reply-To: <fa48pe$tmv$1@news.datemas.de>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
	<fa48pe$tmv$1@news.datemas.de>
Message-ID: <1187359486.525041.159680@q4g2000prc.googlegroups.com>

On Aug 17, 9:45 am, "Victor Bazarov" <v.Abaza... at comAcast.net> wrote:
> chewie54 wrote:
> > What would be the best cross-platform GUI library to use for a vector
> > based CAD program ( something like Visio on Windows )   WxWidgets,
> > Tk,   PyQt,  Java Swing,  Java SWT,????   I need the capibility to
> > draw and edit in a window that looks like a page of paper so WYSIWYG
> > is very important,  and I need to save the drawings in vector based
> > file formats like PS, EPS,  SVG, as well as image formats like jpg,
> > png, and gif.  Also, the images need to be high resolution so that
> > they can be pasted into various other programs in Windows OS,  and
> > Linux OS,  and the Mac OS.
>
> You might actually consider asking in the 'comp.graphics' hierarchy
> instead of the language newsgroups.
>
> V
> --
> Please remove capital 'A's when replying by e-mail
> I do not respond to top-posted replies, please don't ask

That group doesn't seem to be active anymore.



From zzbbaadd at aol.com  Thu Aug 30 15:00:42 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Thu, 30 Aug 2007 12:00:42 -0700
Subject: subclassing Python types
Message-ID: <1188500442.434722.157350@q5g2000prf.googlegroups.com>

I have read that you can derive from the base classes such as str,
list, dict.

I guess this would look like:

def MyString(str):
def MyList(list):
def MyDict(dict):


How do you access the data that is contained in the super class?



From mgi820 at motorola.com  Tue Aug 14 12:18:14 2007
From: mgi820 at motorola.com (Gary Duzan)
Date: Tue, 14 Aug 2007 16:18:14 +0000 (UTC)
Subject: JPype - passing to Java main
References: <1187040070.806416.75090@r34g2000hsd.googlegroups.com>
	<1187095969.789811.63960@j4g2000prf.googlegroups.com>
	<f9s972$hd2$1@news2.u-psud.fr>
	<1187097639.176267.33050@d55g2000hsg.googlegroups.com>
Message-ID: <f9skk6$4db$1@engnntp2.cig.mot.com>

In article <1187097639.176267.33050 at d55g2000hsg.googlegroups.com>,
 <unlikeablePorpoise at gmail.com> wrote:
>Good point Laurent. Here is the error produced when I try to access
>main() using
>'com.JPypeTest.main("arg")'
>
>The original code is pasted at the top of this thread. I only added
>'com.JPypeTest.main("arg")' which causes the error below
>
>-------------ERROR_-------------
>  File "tester.py", line 10, in <module>
>    com.JPypeTest.main("arg")
>RuntimeError: No matching overloads found. at src/native/common/
>jp_method.cpp:121
>----------END ERROR-------------
>
>Thanks,
>Sarah

   Just a guess, but try com.JPypeTest.main(["arg"]).

					Gary Duzan
					Motorola HNM



>On Aug 14, 8:03 am, Laurent Pointal <laurent.poin... at limsi.fr> wrote:
>> unlikeablePorpo... at gmail.com a ?crit :
>>
>> >> Try this:
>> >> com.JPypeTest.main("arg")
>>
>> >> Ian
>>
>> > Thanks for your suggestion, but it doesn't work (produces an error).
>>
>> This is where you should have copy/pasted the error.
>>
>> ;-)
>>
>>
>>
>> > Does anybody else have any ideas?
>>
>> Sorry, no.
>
>




From jonshan at winlab.rutgers.edu  Fri Aug 17 17:06:56 2007
From: jonshan at winlab.rutgers.edu (Jonathan Shan)
Date: Fri, 17 Aug 2007 14:06:56 -0700
Subject: Array and floating point
Message-ID: <1187384816.251783.95410@19g2000hsx.googlegroups.com>

Hello,

I'm experiencing a problem where the float being appended to the array
is not the same as the result of the appending.

>>> from array import *
>>> x = array('f')
>>> x.append(float("0.1"))
>>> x[0]
0.10000000149011612
>>> float("0.1")
0.10000000000000001

I'm expecting x[0] = 0.10000000000000001

Thanks
Jonathan Shan



From toby at tobiah.org  Wed Aug 22 14:25:13 2007
From: toby at tobiah.org (Tobiah)
Date: Wed, 22 Aug 2007 11:25:13 -0700
Subject: How do I express a backslash in a string?
In-Reply-To: <46cc723c$0$16263$88260bb3@free.teranews.com>
References: <46cc723c$0$16263$88260bb3@free.teranews.com>
Message-ID: <46cc7382$0$24191$88260bb3@free.teranews.com>

Tobiah wrote:
>>>> "'"
> "'"
>>>> "\'"
> "'"
>>>> "\\'"
> "\\'"
>>>> "\\\'"
> "\\'"
>>>>   
> 
> This is quite different than any other language
> that I am used to.  Normally, a double backslash
> takes away the special meaning of the last backslash,
> and so you are left with a single backslash.
> 
> How do I express the single backslash?
> 
> Thanks,
> 
> Tobiah

A little more looking, and I see:


>>> "\\'"
"\\'"
>>> len("\\'")
2
>>>     


So it was just the console representation that was fooling
me into thinking that I had a double backslash.

-- 
Posted via a free Usenet account from http://www.teranews.com



From orsenthil at users.sourceforge.net  Sun Aug 19 13:52:40 2007
From: orsenthil at users.sourceforge.net (O.R.Senthil Kumaran)
Date: Sun, 19 Aug 2007 23:22:40 +0530
Subject: yet another indentation proposal
In-Reply-To: <c7_xi.136$lJ2.120@fe089.usenetserver.com>
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
	<1187538922.849174.94870@19g2000hsx.googlegroups.com>
	<c7_xi.136$lJ2.120@fe089.usenetserver.com>
Message-ID: <20070819175239.GA3437@gmail.com>

Hi Aaron,

> Finally, just to be clear, I do not want to change the way 99.9% of Python 
> code is written.  I feel that the indentation model is a good one for 99.9% 
> of users.  What I do want to do is simply give the Python interpreter a tiny 
> bit more flexibility to handle code from users or environments where 
> indentation is not possible or practical.

It never crossed my mind about the problem you have mentioned.
The indentation proposal that you have put forth is infact a beaten up one, and I think, python gurus did not subscribe to it. Your requirement, in fact requests to look at it from a new perspective. 
We got to figure out what the different ways in which this issue can be handled.a) Screen Reader Clients. Can Screen Reader have a plugin, that will overlay a brackets to the indented code. ?
b) How does software like voicecode handle the scenario?
c) Have you spoken to other python programmers like you? I can remember 'Peter Lundblad' who works on 'svn' and I kind of feel that he must have worked on Python as well. They will be your best guide, IMHO.

>From a normal user perspective, I can feel that addition of _{ and _} to the language proper is not going to be acceptable by many users/programmers.


-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From steve at REMOVE-THIScybersource.com.au  Sun Aug 26 12:32:29 2007
From: steve at REMOVE-THIScybersource.com.au (Steven D'Aprano)
Date: Sun, 26 Aug 2007 16:32:29 -0000
Subject: lisper learning python, ... could you please comment my first
	python program?
References: <1188143768.742884.38520@r29g2000hsg.googlegroups.com>
Message-ID: <13d3aot56lq4l58@corp.supernews.com>

On Sun, 26 Aug 2007 15:56:08 +0000, neptundancer wrote:

> Hi,
>   to extend my skills, I am learning python. I have written small
> program which computes math expression like "1+2*sin(y^10)/cos(x*y)" and
> similar, so far only + - * / ^ sin con tan sqrt are supported. But my
> program is quite inextensible, I have to change the code to add new
> functions... Could some fellow experienced pythonista give me some tips
> how to make my program shorter, and more extensible?

Just a few comments at random. This is certainly not meant to be 
exhaustive:


> def normalize(string):
>     tmp = "".join([c for c in string if c != " "]) 
>     return "(" + tmp + ")"

Try this instead:

def normalize(astring):
    return "(" + astring.replace(" ", "") + ")"



> def most_nested_expression(string):
[snip code]
>     if level != 0:
>         raise IOError("mismatched parens")

You raise IOError quite often, but that's a misuse of it. IOError is a 
subclass of EnvironmentError, and is meant to indicate (e.g.) a failed 
read from a disk.

If you execute help(IOError) at the interactive prompt, you will see:

class IOError(EnvironmentError)
 |  I/O operation failed.


I suggest a better exception to use would be ValueError, or even create 
your own:

class MyCustomError(ValueError):
    pass

would be a minimal example.




> def is_reduced_expression(string):
>     for c in string:
>         if c == "^" or c == "*" or c == "/" or c == "+" or c == "-":
>             return False
>     return True

Change that to:

for c in string:
    if c in "^*/+-": return False
return True


[snip]


> def add(a, b): return a + b
> def sub(a, b): return a - b
> def mul(a, b): return a * b
> def div(a, b): return a / b

Replace the above four functions with:

from operator import add, sub, mul
from operator import truediv as div



> def translate_function(fn_str):
>     if fn_str == "+": return add
>     elif fn_str == "-": return sub
>     elif fn_str == "*": return mul
>     elif fn_str == "/": return div
>     elif fn_str == "^": return math.pow
>     elif fn_str == "sin": return math.sin elif fn_str == "cos": return
>     math.cos elif fn_str == "tan": return math.tan elif fn_str ==
>     "sqrt": return math.sqrt else: raise IOError("unknown function %s" %
>     fn_str)


fn_map = {"+": add, "-": sub, "*": mul, "/": div, 
    "^": math.pow, "sin": math.sin } # etc.

def translate_function(fn_str):
    try:
        return fn_map[fn_str]
    except KeyError:
        raise ValueError("unknown function '%s'" % fn_str)


Hope that helps.


-- 
Steven.


From paddy3118 at googlemail.com  Wed Aug  8 13:29:40 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Wed, 08 Aug 2007 17:29:40 -0000
Subject: Doctest in Python implementations
Message-ID: <1186594180.976905.24930@l70g2000hse.googlegroups.com>

Hi,
I'm wanting to update the Wikipedia entry on doctest with information
on which current python implementations support the doctest module.
So, does Doctest come with ironpython, jython, python for Nokia phones
(what is that called)?

Thanks.



From jeff.fw at gmail.com  Wed Aug 29 09:25:25 2007
From: jeff.fw at gmail.com (Jeff)
Date: Wed, 29 Aug 2007 13:25:25 -0000
Subject: Creating a multi-tier client/server application
In-Reply-To: <46d54ed8$0$429$426a34cc@news.free.fr>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
Message-ID: <1188393925.007952.313110@r29g2000hsg.googlegroups.com>

Thanks for the quick responses.

I was really hoping to avoid an entirely web-based app, for a few
reasons, not the least of which is that I've been working almost
entirely on web apps for the past few years, and I am getting mighty
sick of it.  A lot of that is due to the language (PHP, which I have
since grown to hate) I had to use.  I've worked on a site for my self
in Python (using Pylons, actually--which is excellent) which was
vastly easier and more fun.  But I'd really like to try something
different.

Now, of course, that's not enough reason to force such a thing onto my
clients (when I say clients, I mean the ones that are paying for this,
but they're really within my same department, so they actually have
working technical knowledge.)  Some reasons for them would be (in no
particular order): 1) More responsive and user-friendly interfaces, 2)
Much better ability to sort, export, import, and print data (very
important), 3) Easier to "lock down" who's using the program by only
installing it on certain machines.

Paul, I've read through a bunch your conversation with Chris--for
simple applications, yes, you're right, why not use the browser?  But
for a lot of this I have to agree with him (although I don't
particularly agree with his tone, but that's irrelevant.)  This will
be a complex enough application that certainly simple HTML & CSS won't
be enough, and the thought of the sheer amount of AJAX trickery (yes,
trickery) that I'll need to use just to get it even *close* to the
usability of a desktop app is rather frightening.  I've done plenty of
stuff with AJAX, and it certainly has its purpose, but it gets
incredibly bloated and fragile *very* quickly.

This application will be used by hundred of people (some of them will
be using it more or less constantly) across several departments in a
large university (Rutgers, if you're interested.)  Because of that, it
needs to work, and last for years--with changes over that time, of
course, but no rewrites--a lot of their current systems are FileMaker
Pro databases... all I can say is, "the horror".  They've used some of
these systems for the past *ten* years with their "databases" breaking
several times a *week*.  Now, they want something that *works*.

Which leads me to the discussion of planning:  if this were a basic
application for myself, I'd plan out the basic objects and database
tables I'd need, and how they should interact--maybe to some extent
what the user interface should work/look like.  But I'd certainly be
flexible.  In this situation, however, I have no such luxury.

This system will be used, often, to figure out how much people should
be paid (and then interface directly with the University's payroll
system), and store lovely things like SSNs, and will also have to have
somewhat crazy business logic to track when hourly workers are
eligible for raises, if they took enough training classes, etc.  There
are a lot of people with a stake in this system, and I will need to
work with them very closely on how this should work, and they sure as
hell don't want any surprises.  My manager even wants use cases (if
you've never had to deal with use cases, consider yourself a lucky,
lucky person) which I am going to attempt to argue as that is even
going *too* far.

So, long story short (too late), no Extreme Programming for me.
Hopefully, the amount of planning will be somewhere in between that
and the bureaucratic nightmare of documenting up front what each
module, class and function will do.

Thanks again for your advice--I really appreciate it.



From horpner at yahoo.com  Tue Aug  7 07:40:52 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 07 Aug 2007 11:40:52 GMT
Subject: seeking tinter module
References: <46b849cf$0$21841$426a74cc@news.free.fr>
Message-ID: <slrnfbgmnj.198.horpner@FIAD06.norwich.edu>

On 2007-08-07, Jean-Fran?ois Pi?ronne <jf.pieronne at laposte.net> wrote:
> I'm looking for a module name tinter (not tkinter...)
>
> from http://www.vex.net/parnassus/apyllo.py?i=97497223
> status: Dead and Gone
>
> Google return no location to download it, only a few
> articles mentionned it, for example:
> http://www.ibm.com/developerworks/linux/library/l-python6.html
>
> Does someone has still a copy of this module?

Here's a Google Cache of the source code I managed to dig up:

http://64.233.169.104/search?q=cache:wRcuIGPk-yYJ:svn.wishy.org/svn/repos/geezer/trunk/boss3client/geezer/widgets/tinter.py+tinter.py&hl=en&ct=clnk&cd=1&gl=us

-- 
Neil Cerutti


From deets at nospam.web.de  Thu Aug 30 04:54:09 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 30 Aug 2007 10:54:09 +0200
Subject: Python doesn't see the directories I create
In-Reply-To: <ldvBi.293202$LE1.92748@newsfe13.lga>
References: <ldvBi.293202$LE1.92748@newsfe13.lga>
Message-ID: <5jnetnFdvvgU1@mid.uni-berlin.de>

mr_gadget schrieb:
> When I create a subfolder, python is not seeing it. Can someone please 
> explain this behaviour ? I just started with python, read the tutorial over 
> the weekend and am writing my very first script. So I may not be seeing 
> something. Both os.path and glob.glob seem not to see a folder I created. 
> Other sibling folders seem to work fine. On a whim I tried paths with \\ 
> double slashes and that worked. But why should single slashes work for some 
> folders and not for others ??
> 
> What I need is to match a bunch of files in a folder with 
> glob.glob(C:\enhancement\rawfiles\*.bin.gz) and send them to a function that 
> unzips them. But I always get []. Yes the folder does have my files, and I 
> checked all permissions etc, everything looks identical to the other folders 
> which python IS seeing. Same problem on my vista pc too.
> 
> Behaviour reproduced below.
> 
> C:\Enhancement>dir /ad
> 
>  Volume in drive C has no label.
> 
>  Volume Serial Number is 8056-41E7
> 
>  Directory of C:\Enhancement
> 
> 08/28/2007  06:15 PM    <DIR>          .
> 
> 08/28/2007  06:15 PM    <DIR>          ..
> 
> 08/28/2007  06:07 PM    <DIR>          BSA Documentation
> 
> 08/28/2007  05:56 PM    <DIR>          output
> 
> 08/29/2007  07:08 PM    <DIR>          rawfiles
> 
> 08/23/2007  04:38 PM    <DIR>          SnapCell2.3.2
> 
> 08/28/2007  06:15 PM    <DIR>          test
> 
>                0 File(s)              0 bytes
> 
>                7 Dir(s)  35,703,283,712 bytes free
> 
> C:\>python -V
> 
> Python 2.5.1
> 
> C:\>python -c "import os; print os.path.exists('C:\enhancement\output')"
> 
> True
> 
> C:\>python -c "import os; print os.path.exists('C:\enhancement\rawfiles')"
> 
> False
> 
> C:\>python -c "import os; print os.path.exists('C:\\enhancement\\rawfiles')"
> 
> True
> 
> C:\>python -c "import glob; print glob.glob('C:\enhancement\rawfiles\*')"
> 
> []
> 
> C:\>python -c "import os; print os.path.exists('C:\enhancement\test')"
> 
> False
> 
> C:\>python -c "import os; print 
> os.path.exists('C:\enhancement\snapcell2.3.2')"

I'm pretty sure it's a missing backslash escape thingy. Either use \\ 
for a backslash in paths, or just the forward slash, it works as well.

And case-sensitivity might be an issue as well.
Diez


From kyosohma at gmail.com  Fri Aug 24 12:12:33 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 24 Aug 2007 09:12:33 -0700
Subject: How to replace a method in an instance.
In-Reply-To: <mailman.258.1187971369.32294.python-list@python.org>
References: <mailman.258.1187971369.32294.python-list@python.org>
Message-ID: <1187971953.261328.219000@q3g2000prf.googlegroups.com>

On Aug 24, 11:02 am, "Steven W. Orr" <ste... at syslang.net> wrote:
> In the program below, I want this instance to end up calling repmeth
> whenever inst.m1 is called. As it is now, I get this error:
>
> Hello from init
> inst =  <__main__.CC instance at 0x402105ec>
> Traceback (most recent call last):
>    File "./foo9.py", line 17, in ?
>      inst.m1()
> TypeError: repmeth() takes exactly 1 argument (0 given)
>
> #! /usr/bin/python
> def repmeth( self ):
>      print "repmeth"
>
> class CC:
>      def __init__( self ):
>          self.m1 = repmeth
>          print 'Hello from init'
>
>      def m1 ( self ):
>          print "m1"
>
> inst = CC()
> inst.m1()
>
> TIA
>
> --
> Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
> happened but none stranger than this. Does your driver's license say Organ ..0
> Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
> individuals! What if this weren't a hypothetical question?
> steveo at syslang.net

Remove "self" from repmeth as it's not required in a function, only in
functions that are defined within a class. Of course, a function in a
class is also know as a method.

Mike



From p at ulmcnett.com  Mon Aug 20 13:26:36 2007
From: p at ulmcnett.com (Paul McNett)
Date: Mon, 20 Aug 2007 10:26:36 -0700
Subject: Mouse control with ctypes in OS X
In-Reply-To: <20070820135358.0B3052303D@atmail.b-one.net>
References: <20070820135358.0B3052303D@atmail.b-one.net>
Message-ID: <46C9CECC.6010401@ulmcnett.com>

Niklas Ottosson wrote:
> I need to get hold of the mouse position and also need to be able to 
> change it. In windows I have used ctypes.windll.user32.getCursorPos() 
> and ctypes.windll.user32.setCursorPos() with great success in my program 
> but now I also need to make a Mac OS X version of the program.
> 
> Does anyone know what the above libraries and functions are called in OS 
> X? Any help is greatly appreciated. 

All I can offer you is the knowledge that OS X will probably not let you 
set the mouse position, as it is a gross violation of the HIG (The user 
is in charge of where the mouse appears, not the application).

But, I'm sure someone will chime in on how to get the mouse position.

-- 
pkm ~ http://paulmcnett.com


From python at jayloden.com  Thu Aug  2 15:06:52 2007
From: python at jayloden.com (Jay Loden)
Date: Thu, 02 Aug 2007 15:06:52 -0400
Subject: XML Processing
In-Reply-To: <496954360708021153l2b20f522ia690707a8fdd7aa3@mail.gmail.com>
References: <1186080339.344993.167670@z24g2000prh.googlegroups.com>
	<496954360708021153l2b20f522ia690707a8fdd7aa3@mail.gmail.com>
Message-ID: <46B22B4C.4020705@jayloden.com>

Robert Dailey wrote:
> Both strings in your example are exactly the same, unless I'm missing
> something.
> 
> On 8/2/07, Roman <rgelfand2 at hotmail.com> wrote:
>> Is there a package that converts a string that contains special
>> characters in xml to to literal value.  For instance, converts string
>> http://myhome/&param to http://myhome/&amp;param.
>>
>> Thanks in advance
>>
>> --
>> http://mail.python.org/mailman/listinfo/python-list


Robert, your newsreader/mail program is converting the HTML/XML entity codes into the corresponding character so you're not seeing the plain text version of what the OP posted. He's asking for code to convert XML entities like '&' into their escaped strings. 

I believe xml.sax.saxutils.encode() is what the OP is looking for:

>>> import xml.sax.saxutils
>>> xml.sax.saxutils.escape('http://myhome/&param')
'http://myhome/&amp;param'

-Jay


From david at boddie.org.uk  Mon Aug 13 08:12:02 2007
From: david at boddie.org.uk (David Boddie)
Date: Mon, 13 Aug 2007 14:12:02 +0200
Subject: Adventure-Engines in Python
Message-ID: <200708131412.02619.david@boddie.org.uk>

On Mon Aug 13 11:33:14 CEST 2007, Wildemar Wildenburger wrote:

> Are there any?
> 
> I've set out to make an adventure game and now I'm trying to find a set 
> of python-modules to help me do that. I know of the usual non-python 
> suspects (AGAST, AGS, Wintermute, ...) and while I they are really good, 
> I'd like one that is cross platform.
> 
> I've found pyScumm and pyAdv but both don't seem to be ready for use 
> yet. So are there any "usable" engines written in python?

It's been a while since I looked at anything like this, but I seem to
remember two Python powered engines: PAWS and PUB.

  http://py-universe.sourceforge.net/
  http://members.nuvox.net/~zt.wolf/PAWS.htm

If you want to write adventures with more graphics and less text, you could
do worse than looking at existing projects and solutions written with Pygame:

  http://www.pygame.org/

David


From paul at boddie.org.uk  Sat Aug  4 09:23:45 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Sat, 04 Aug 2007 06:23:45 -0700
Subject: Website data-mining.
In-Reply-To: <mailman.1608.1186210048.22759.python-list@python.org>
References: <mailman.1603.1186196436.22759.python-list@python.org>
	<1186207478.055593.107110@z24g2000prh.googlegroups.com>
	<mailman.1608.1186210048.22759.python-list@python.org>
Message-ID: <1186233825.519650.102840@d55g2000hsg.googlegroups.com>

Jay Loden wrote:
> Miki wrote:
> > Have a look at http://www.myinterestingfiles.com/2007/03/playboy-germany-ads.html
>
> Well, it's certainly interesting, but I'm not sure how it might help the OP get data from a website...

A case of the Freudian clipboard, perhaps? ;-)

Paul



From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Mon Aug  6 15:03:23 2007
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J. Fromberger)
Date: Mon, 06 Aug 2007 15:03:23 -0400
Subject: boolean operations on sets
References: <1186409631.147290.323400@22g2000hsm.googlegroups.com>
	<5hotveF3l5gmkU1@mid.uni-berlin.de>
Message-ID: <Michael.J.Fromberger-4236F2.15032306082007@localhost>

In article <5hotveF3l5gmkU1 at mid.uni-berlin.de>,
 "Diez B. Roggisch" <deets at nospam.web.de> wrote:

> Flavio wrote:
> 
> > Hi, I have been playing with set operations lately and came across a
> > kind of surprising result given that it is not mentioned in the
> > standard Python tutorial:
> > 
> > with python sets,   intersections  and unions are supposed to be done
> > like this: 
> > [...]
> > 
> > The results are not what you would expect from an AND  or OR
> > operation, from the mathematical point of view! aparently the "and"
> > operation is returning the the second set, and the "or" operation is
> > returning the first.
> > [...]
> 
> It has nothing to do with sets - it stems from the fact that certain values
> in python are considered false, and all others true. And these semantics
> were introduced at a point where there was no explicit True/False, so the
> operators were defined in exact the way you observed.
> 
> Consider this:
> 
> "foo" or "bar" -> "foo"
> 
> So - nothing to do with sets.

In addition to what Diez wrote above, it is worth noting that the 
practise of returning the value of the determining expression turns out 
to be convenient for the programmer in some cases.  Consider the 
following example:

  x = some_function(a, b, c) or another_function(d, e)

This is a rather nice shorthand notation for the following behaviour:

  t = some_function(a, b, c)
  if t:
    x = t
  else:
    x = another_function(d, e)

In other words, the short-circuit behaviour of the logical operators 
gives you a compact notation for evaluating certain types of conditional 
expressions and capturing their values.  If the "or" operator converted 
the result to True or False, you could not use it this way.  

Similarly,

  x = some_function(a, b, c) and another_function(d, e)

... behaves as if you had written:

  x = some_function(a, b, c)
  if x:
    x = another_function(d, e)

Again, as above, if the results were forcibly converted to Boolean 
values, you could not use the shorthand.

Now that Python provides an expression variety of "if", this is perhaps 
not as useful as it once was; however, it still has a role.  Suppose, 
for example, that a call to some_function() is very time-consuming; you 
would not want to write:

  x = some_function(a, b, c) \
      if some_function(a, b, c) else another_function(d, e)

... because then some_function would get evaluated twice.  Python does 
not permit assignment within an expression, so you can't get rid of the 
second call without changing the syntax.

Also, it is a common behaviour in many programming languages for logical 
connectives to both short-circuit and yield their values, so I'd argue 
that most programmers are proabably accustomed to it.  The && and || 
operators of C and its descendants also behave in this manner, as do the 
AND and OR of Lisp or Scheme.  It is possible that beginners may find it 
a little bit confusing at first, but I believe such confusion is minor 
and easily remedied.

Cheers,
-M

-- 
Michael J. Fromberger             | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/  | Dartmouth College, Hanover, NH, USA


From frank.wilder at gmail.com  Tue Aug 21 15:33:51 2007
From: frank.wilder at gmail.com (franko353)
Date: Tue, 21 Aug 2007 19:33:51 -0000
Subject: py2app and eggs
Message-ID: <1187724831.764958.24150@g4g2000hsf.googlegroups.com>

This may be common information, but I had trouble finding it.

I was getting an ImportError whenever I tried to run a built app from
py2app.

It turns out that using py2app version "0.3.6", it was having trouble
with zipped egg installs.

I had to move my zipped egg file to a temporary location (from
sitepackages) and issue a ``easy_install -Z somepackage.egg``.

Once I did this, I stopped getting the ImportError and everything
worked.



From joshua at eeinternet.com  Thu Aug  2 17:44:38 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Thu, 02 Aug 2007 13:44:38 -0800
Subject: Bug in time, part 2
Message-ID: <f8tj86$lsd$1@sea.gmane.org>

Or could I entitle this, "A Wrinkle in time.py," with apologies to Madeleine
L'Engle.  Either I've found a bug (or rather room for improvement) in
time.py, or I *really* need a time module that doesn't assume so much.

After the suggestions to try setting the dst flag to zero, I did some more
experimentation, and here is what I came up with:

>>> import os
>>> import time
>>> os.environ['TZ'] = 'GMT'
>>> time.tzset()
>>> time.tzname
('GMT', 'GMT')
>>> time.mktime((2007, 3, 11, 2, 30, 0, 6, 70, 0))
1173580200.0
>>> time.mktime((2007, 3, 11, 3, 30, 0, 6, 70, 0))
1173583800.0

OK, so far I'm seeing a one hour difference.

>>> time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(1173580200.0))
'2007-03-11 02:30:00'
>>> time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(1173583800.0))
'2007-03-11 03:30:00'

Yay! it works!  But, let's do this:

>>> import time
>>> time.tzname
('AKST', 'AKDT')
>>> int(time.mktime(time.strptime('2007-03-11 2:30:00','%Y-%m-%d %H:%M:%S'
[0:8] + (0,)))
1173612600
>>> int(time.mktime(time.strptime('2007-03-11 3:30:00','%Y-%m-%d %H:%M:%S'
[0:8] + (0,)))
1173616200
>>>

OK, that looks good, a one hour difference, and I told it not to figure in
dst (the last 0). BUT:

>>> time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(1173612600)[0:8] +
(0,))
'2007-03-11 03:30:00'
>>> time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(1173616200)[0:8] +
(0,))
'2007-03-11 04:30:00'

So, apparently localtime assumes DST (since we're in DST right now) and
there is no way to tell it the unixtime given to it was calculated under
the assumption of no daylight savings.  And would this particular test case
work if I told it to use DST?  Yes, but then I'd have several hundred other
test cases failing.  I think localtime needs to have a parameter to tell it
not to assume DST, even if DST would normally be active in that date range.

So, at any rate, my fix/workaround is to manually set time.py to use UTC to
convert to and from, and then deal with the times I have from there.  All I
wanted to do was convert an 18 or 19 byte character string (ISO date/time)
to a four byte character string (key in a dict, can't use ints in a shelve
db), and I end up spending HOURS trying to figure out 1) why I was getting
duplicate keys, then 2) why mktime was generating duplicate unix times, and
finally 3) why localtime wasn't converting back correctly.  Sigh.  Some
days I hate DST. :)

Thanks to all for the pointers and help.

In other news, setting time.tzname = ('GMT', 'GMT') does nothing.  You have
to set the environment variable, then call tzset.  Is there a rational for
this?  Seems odd.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From max at alcyone.com  Tue Aug 14 21:49:27 2007
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 14 Aug 2007 18:49:27 -0700
Subject: Retry: Question about FutureWarning
In-Reply-To: <mailman.1994.1187142273.22759.python-list@python.org>
References: <mailman.1994.1187142273.22759.python-list@python.org>
Message-ID: <ubKdnTirKeU6xl_bnZ2dnUVZ_rzinZ2d@speakeasy.net>

Steven W. Orr wrote:

> M1.py:268: FutureWarning: hex/oct constants > sys.maxint will
> return positive values in Python 2.4 and up
>    StartTime   = safe_dict_get ( dic, 'starttime', 0xFFFFFFFF )
	...
> import warnings
> warnings.filterwarnings('ignore', category=FutureWarning)
> 
> My question is this: Why can the warning not be shut off by putting the
> two lines in M1 where the reference exists to 0xFFFFFFFF ?

You really don't want to shut off the warning; it means just what it says:

Python 2.3.5 (#1, Feb  8 2005, 23:36:23)
[GCC 3.2.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> 0xffffffff
<stdin>:1: FutureWarning: hex/oct constants > sys.maxint will return 
positive values in Python 2.4 and up
-1

Python 2.4.3 (#1, Mar 29 2006, 17:16:11)
[GCC 3.2.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> 0xffffffff
4294967295L

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Black vinyl man with black plasticized imagination
    -- Nik Kershaw


From aleax at mac.com  Sun Aug 19 12:22:04 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 19 Aug 2007 09:22:04 -0700
Subject: yet another indentation proposal
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
	<1187538922.849174.94870@19g2000hsx.googlegroups.com>
Message-ID: <1i335jn.g5ymo519vckxfN%aleax@mac.com>

Paddy <paddy3118 at googlemail.com> wrote:
   ...
> Can screen reaaderss be customized?

Open-source ones surely can (e.g., NVDA is an open-source reader for
Windows written in Python, <http://www.nvda-project.org/> -- alas, if
you search for NVDA Google appears to be totally convinced you mean
NVidia instead, making searches pretty useless, sigh).

> Maybe their is a way to get the screen reader to say indent and dedent
> at thee appropriate places?

There definitely should be.

> Or maybe a filter to put those wordds into the source?

.../Tools/scripts/pindent.py (comes with the Python source distribution,
and I hope that, like the whole Tools directory, it would also come with
any sensible packaged Python distribution) should already be sufficient
for this particular task.  The "indent" always happens (in correct
Python sources) on the next line after one ending with a colon;
pindent.py can add or remove "block-closing comments" at each dedent
(e.g., "# end for" if the dedent is terminating a for-statement), and
can adjust the indentation to make it correct if given a Python source
with such block-closing comments but messed-up indentation.


Alex


From ars at iki.fi  Fri Aug 10 07:51:56 2007
From: ars at iki.fi (Antti Rasinen)
Date: Fri, 10 Aug 2007 14:51:56 +0300 (EEST)
Subject: Question about properties.
In-Reply-To: <1186741289.074717.174370@e16g2000pri.googlegroups.com>
References: <1186741289.074717.174370@e16g2000pri.googlegroups.com>
Message-ID: <1510.194.137.123.216.1186746716.squirrel@mail.kapsi.fi>


> Hi,
>
> i read in a book the following code snippet that is dealing with
> properties:
>
> class ProtectAndHideX(object):
>     def __init__(self, x):
>         assert isinstance(x, int), '"x" must be an integer!"'
>         self.__x = ~x
>
>     def get_x(self):
>         return ~self.__x
>
>     x = property(get_x)
>
>
> Can anyone please help me understand what the symbol "~" does here ??

My guess is that the example tries to show that it does not matter how the
property computes the value. You can -- if you want -- to store integers
as their bit-inverted versions (the ~ operator) and then do the conversion
when getting the property value.

Assume you initialized the object with ProtectAndHideX(4). Outside the
object you don't have access to the original __x. And! Even if you changed
the name of the variable name to y, you'd have hidden_x.y == -5 instead of
4.

The example is very contrived. There might be some security related cases
where you need to hide what you store in memory, though. (Hopefully they
do more than just invert the bits! :)

NB: I don't know what the original author was thinking here -- my
telepathy isn't what it used to be.

-- 
[ Antti Rasinen <*> ars at iki.fi ]



From mikael at isy.liu.se  Thu Aug 16 04:57:24 2007
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Thu, 16 Aug 2007 10:57:24 +0200
Subject: Combinatorial of elements in Python?
In-Reply-To: <9e2f512b0708151011mc86ede7o68a92515c4cf3017@mail.gmail.com>
References: <9e2f512b0708142203m782b0e10s817fb4d061ba0e46@mail.gmail.com>	<46C2F538.8000900@isy.liu.se>	<9e2f512b0708150651g7a9834cdm2db874d84804e362@mail.gmail.com>	<46C32D6E.7070804@isy.liu.se>
	<9e2f512b0708151011mc86ede7o68a92515c4cf3017@mail.gmail.com>
Message-ID: <46C41174.9060909@isy.liu.se>

Sebastian Bassi wrote:
> On 8/15/07, Mikael Olofsson <mikael at isy.liu.se> wrote:
>   
>> What is unclear here is in what order the keys should be visited. The
>> following assumes that the keys should be considered in alphanumeric order.
>>     
>
> Yes, my fault. The orden should be given by a string, like:
>
> DCDBA
> Using this dictionay.
> A={'A':['1','2'],'B':['4','5'],'C':['6','7','8'],'D':['9']}
>
> Should return:
>
> '96941'
> '97941'
> '97942'
> '96942'
> '98941'
> '98942'
> '96951'
> '97951'
> '97952'
> '96952'
> '98951'
> '98952'

OK, seems like you need to add a second argument to the function 
specifying this order. I leave that to you.

/MiO


From steve at holdenweb.com  Wed Aug  1 19:45:02 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 01 Aug 2007 19:45:02 -0400
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <1186008687.142015.55060@q75g2000hsh.googlegroups.com>
References: <46AF8ED7.2070206@wingware.com>	<20070801212840.GA25065@spookie1.spookiegate>	<f8quug$m7j$1@sea.gmane.org>	<496954360708011453h2a68dee4x48dcb15bb25ea717@mail.gmail.com>	<f8r0du$qhn$1@sea.gmane.org>	<mailman.1460.1186007000.22759.python-list@python.org>
	<1186008687.142015.55060@q75g2000hsh.googlegroups.com>
Message-ID: <f8r5u0$91f$1@sea.gmane.org>

Paul Boddie wrote:
> Steve Holden wrote:
>> I can't think of any other products I use where you can contact the
>> support team from right inside the software. And get answers without
>> paying per-incident support fees!
> 
> Proprietary products, right? A lot of KDE applications have a "Report
> Bug..." item in the "Help" menu, for example. Perhaps you're thinking
> of the same kind of thing.
> 
> Paul
> 
Just "products I use". I'm not currently a KDE user, but I do use a lot 
of open source on Windows.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From gagsl-py2 at yahoo.com.ar  Wed Aug 22 10:13:21 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 22 Aug 2007 07:13:21 -0700
Subject: advice about `correct' use of decorator
In-Reply-To: <mailman.112.1187787625.32294.python-list@python.org>
References: <46C4B097.4080309@fmed.uba.ar>
	<740c3aec0708170529s6f7e7fe2l8c92771c2d0a51d4@mail.gmail.com>
	<46C5C9AE.5020508@fmed.uba.ar>
	<mailman.112.1187787625.32294.python-list@python.org>
Message-ID: <1187792001.935204.42330@e9g2000prf.googlegroups.com>

On 22 ago, 10:00, "BJ?rn Lindqvist" <bjou... at gmail.com> wrote:
> On 8/17/07, Gerardo Herzig <gher... at fmed.uba.ar> wrote:
>
> > BJ?rn Lindqvist wrote:
> > >def is_logued_in():
> > >    if not user.is_logged_in():
> > >        raise NotLoggedInError
>
> > >It costs you one more line, but reduces complexity. And if you are
> > >worried about that extra line you can put it in a function.
>
> > As far as i know (by the way, AFAK is the shortcut?, and BTW means `by
> > the way'? ), decorators are not indispensable. I mean, all that you can
> > do with python, you can doit without decorators. And from my point of
> > view, this hides the complexity for the other developers of my group,
>
> hiding is not the same thing as reducing. By hiding the code behind a
> decorator, you are increasing the complexity by adding another layer
> that the programmer has to look through to see your control flow.
>
> > since all they have to do is add the @is_logged_in line at the top of
> > the cgi script, and not to worrie about exceptions, not even how the
> > decorator is implemented (i may log the error in some file). All they
> > have to know is that any abnormal situation will redirect to the `login'
> > screen.
>
> As I said, you can accomplish the exact same thing by calling a
> function from within the function that requires the user to be logged
> in.
>
> def change_pass():
>     check_user_logged_in()
>     ... more stuff here...
>
> is less complex (and therefore preferable) than:
>
> @check_user_logged_in
> def change_pass():
>     ... more stuff here...
>
> An important principle in engineering is that you should always strive
> to make your design as simple as possible. If you have two equal
> designs, you should always choose the one that is simpler because
> simple things are easier to understand than complex things.

I don't see the complexity in this case - both are a single line of
code. Any internal complexity is hidden by the language. In fact, I
consider the decorated function simpler than the other: its body
represents exactly what the function does, without any distracting
precondition calls.
The decorator has some advantages: can have syntax support on your
editor, can perform some registering/logging, it's even easier to
quickly check visually if it's here.

--
Gabriel Genellina



From claird at lairds.us  Tue Aug  7 09:53:19 2007
From: claird at lairds.us (Cameron Laird)
Date: Tue, 7 Aug 2007 13:53:19 +0000
Subject: Which GUI toolkit (was: Tkinter or wxpython?)
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<7x3aywr4tc.fsf@ruckus.brouhaha.com>
	<4866bea60708061043x34fb94edg8b675eb1608af9b1@mail.gmail.com>
	<mailman.1689.1186424331.22759.python-list@python.org>
Message-ID: <f3amo4-p2m.ln1@lairds.us>

In article <mailman.1689.1186424331.22759.python-list at python.org>,
Bryan Hepworth  <bryan at redfedora.co.uk> wrote:
			.
		[waaaaaaay too
		much quoted text
		for my taste]
			.
			.
>> I'm not trying to claim that there are no benefits to web
>> applications. But I often see people touting the web as a *superior
>> application platform*, which is simply false, and as innately simpler
>> to develop for, which is also false.
>>   
>I'm also in a similar predicament starting to look at Python for the 
>first time.
>
>I'd be curious to know peoples take on other GUI's like pygtk and pyqt 
>for example to get a fuller picture. As a total newbie the list seems 
>daunting so taking advantage of other peoples experiences seems like a 
>good idea.
>
>Bryan

The traditional answer is, "We've already discussed that far too
often; go search the comp.lang.python archive on your own, because
all the answers are there."

I regard that as unhelpful.  <URL:
http://wiki.python.org/moin/ChoosingGuiToolkits > *could* be a good
answer, but it's not, at least not yet.  Perhaps the best immediate
help is <URL: http://wiki.python.org/moin/GuiProgramming >.

Even better, maybe:  read through these materials, start to integrate
your own findings into what the Wiki already makes available, and
likely others of us will pitch in.


From gagsl-py2 at yahoo.com.ar  Mon Aug 20 03:59:46 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Aug 2007 04:59:46 -0300
Subject: passing arguments with ampersands
References: <f6be0af40708180354u719f5c71p2be27e0ee8317f9b@mail.gmail.com>
	<20070818112913.GA3632@gmail.com>
	<f6be0af40708180524n8d11a68xfcbee5c7f268bdea@mail.gmail.com>
Message-ID: <op.txcltwwwx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 18 Aug 2007 09:24:35 -0300, SHY <soundplay at gmail.com> escribi?:

> theres no special portion of code, just the one that handles filenames  
> with
> spaces.
> the problem is that when i associate a file extension to my application  
> and
> i open it, the filename is not quoted before passed as an arguement. i  
> dont
> know if its the problem of windows or something, or it was just my fault
> when i incorrectly associated the extension.

How did you associate it?
Usually the registry entries are:

HKCR\.ext = filetype
HKCR\filetype = File Description
HKCR\filetype\shell\open\command = "path\to\your\program" "%1"

(Note the double quotes around %1)

Get it right at the registry, and forget all that trickery joining  
sys.argv parts

-- 
Gabriel Genellina



From dstromberg at datallegro.com  Wed Aug 29 17:54:50 2007
From: dstromberg at datallegro.com (Dan Stromberg - Datallegro)
Date: Wed, 29 Aug 2007 21:54:50 GMT
Subject: re compiled object result caching?
References: <1188417101.936530.182480@50g2000hsm.googlegroups.com>
	<mailman.122.1188423947.28954.python-list@python.org>
Message-ID: <pan.2007.08.29.21.54.50.317879@datallegro.com>

On Wed, 29 Aug 2007 17:45:36 -0400, Steve Holden wrote:

> Dan wrote:
>> foo_re = re.compile(r"foo(bar)")
>> # . . .
>> if foo_re.search(line):
>>     foo_re.last_result().group(1)
>> 
> If you wanted to implement this I don't really see why a method call is 
> necessary. It would surely only need to be a simple attribute?
> 
> Of course you then introduce the possibility that someone will reference 
> if before using the RE in a search, plus it still requires separate 
> storage if you want the ability to use the same RE for two different 
> matches and compare the match results.

I've long felt that publicly accessible attributes probably should be
syntactic sugared to look like accessor methods, a bit like how __add__
ends up being + - so that if your attribute ever needs to become methods
(say, it started out life as a unidimensional thing, but later needs to
be a flattening of 3 dimensions or something), you won't necessarily need
to change depenent code.

But are methods a lot more expensive in python than referencing other
kinds of attributes?



From martin at v.loewis.de  Wed Aug 29 10:40:49 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 29 Aug 2007 16:40:49 +0200
Subject: strange list comprehension on generator
In-Reply-To: <mailman.105.1188396882.28954.python-list@python.org>
References: <mailman.105.1188396882.28954.python-list@python.org>
Message-ID: <46D58571.7090204@v.loewis.de>

> #this does not return the way I would expect. why?

You yield the very same list object all the times. So
when you make a later change, all earlier results will
get changed, too (since they are the same object).
Of course, it won't affect the terminal output, so you
don't see that the older values changed in the example
that you think works as expected.

HTH,
Martin


From navidearr at yahoo.com  Thu Aug  9 14:22:30 2007
From: navidearr at yahoo.com (Naveen kumar)
Date: Thu, 9 Aug 2007 11:22:30 -0700 (PDT)
Subject: how to call file from Jython?
Message-ID: <579774.52462.qm@web52803.mail.re2.yahoo.com>

Hi I want to excute a .cmd file on windows through jython.. How can i do that?
   
  I am using following code
   
  import os
   
  os.system("C:/testfile/anotherfolder/Startserver.cmd")
   
  can any body let me know how can excute Startserver.cmd from jython??
   
  thanks,
  Naveen

       
---------------------------------
Be a better Globetrotter. Get better travel answers from someone who knows.
Yahoo! Answers - Check it out.
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From zondo42 at googlemail.com  Fri Aug  3 02:28:25 2007
From: zondo42 at googlemail.com (Glenn Hutchings)
Date: Fri, 03 Aug 2007 06:28:25 -0000
Subject: Tkinter or wxpython?
In-Reply-To: <mailman.1550.1186099225.22759.python-list@python.org>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
Message-ID: <1186122505.996640.262520@d55g2000hsg.googlegroups.com>

On Aug 3, 1:00 am, "wang frank" <f... at hotmail.co.jp> wrote:
> I want to build a GUI to execut python script. I found TKinter and
> wxpython. Which one is easier for a newbie? and which one is better?

Well, Tkinter comes with Python, so newbies can get up and running
straight away without having to download and install anything else.
And there are probably lots more examples out there that a newbie can
look at and learn from.  As for *better*, wxPython has a lot more
kinds of widgets in it, which will make writing GUIs less tedious in
the long run, and the widgets look a lot nicer too.

Glenn



From vedrandekovic at v-programs.com  Sat Aug 11 06:09:40 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Sat, 11 Aug 2007 03:09:40 -0700
Subject: python 2.5 bug
In-Reply-To: <5i5fktF3ml00gU1@mid.uni-berlin.de>
References: <1186825286.493878.80380@l70g2000hse.googlegroups.com>
	<5i5fktF3ml00gU1@mid.uni-berlin.de>
Message-ID: <1186826980.346619.287670@r34g2000hsd.googlegroups.com>

On 11 kol, 11:59, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Sat, 11 Aug 2007 02:41:26 -0700, vedrandekovic wrote:
> > I was install Python 2.5 and uninstall Python 2.4 now I cannot run my
> > scripts, only from idle
>
> > What should I do?
>
> Install 2.4 again.  Both can be installed in parallel.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

I need python 2.5 for work becose python 2.4 module tokenizer has no
attribute "untokenize"

Regards,
Vedran



From thomas at jollans.com  Tue Aug 14 19:38:50 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Wed, 15 Aug 2007 01:38:50 +0200
Subject: buggie in else syntax ?
In-Reply-To: <46C21D70.8000409@gmail.com>
References: <46C21D70.8000409@gmail.com>
Message-ID: <200708150138.57816.thomas@jollans.com>

On Tuesday 14 August 2007, stef mientki wrote:
> hello,
>
> I've the idea that the "else" syntax is not always handled correctly,
> or I'm overlooking something.
>
> This pieces of code are automatic translation from another language,
> sometimes it works, sometimes it doesn't ???
>
> This piece of code works nice:
>
>     a = 2
>
>     def JSM (line_nr):
>           print line_nr
>
>     if a>3:
>         print 'asddas'
>     else: JSM(230) ; \        <== this is the problem line, that's ok here
>         print 'aaps'
>
> While this piece of code gives a syntax error:
>
>     #Function button_antidender(bit in pin,sbyte in out
>     Button_Counter_Temp,byte in demp) return bit is
>     def button_antidender ( pin, button_counter_temp, demp ):
>          #serial_hw_write(counter)
>         Serial_HW_Write ( button_counter_temp )                 ;JSM(226)
>         if JSM(227) and (   button_counter_temp >= 0 ):
>             if JSM(228) and (  pin == on ):
>                 button_counter_temp =  button_counter_temp  +  1
>     ;JSM(229)
>             else: JSM(230) ;
>     \                                                <=== SYNTAX ERROR

is there a newline before the backslash ? Or a space after the backslash but 
before the newline ?

-- 
      Regards,                       Thomas Jollans
GPG key: 0xF421434B may be found on various keyservers, eg pgp.mit.edu
Hacker key <http://hackerkey.com/>:
v4sw6+8Yhw4/5ln3pr5Ock2ma2u7Lw2Nl7Di2e2t3/4TMb6HOPTen5/6g5OPa1XsMr9p-7/-6
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From uymqlp502 at sneakemail.com  Wed Aug 29 01:21:49 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Tue, 28 Aug 2007 22:21:49 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
Message-ID: <1188364909.397692.209170@q4g2000prc.googlegroups.com>

On Aug 28, 9:35 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> Russ wrote:
> > I just stumbled onto PEP 316: Programming by Contract for Python
> > (http://www.python.org/dev/peps/pep-0316/). This would be a great
> > addition to Python, but I see that it was submitted way back in 2003,
> > and its status is "deferred." I did a quick search on
> > comp.lang.python,
> > but I don't seem to see much on it. Does anyone know what the real
> > status is of getting this into standard Python? Thanks.
>
> PEP's with "deferred" status typically aren't going into Python any time
> soon, if ever.  Since the due date for all Python 3 core changes is long
> past due, you won't even be seeing it in Python 3.
>
> Steve

Thanks for that information. That's too bad, because it seems like a
strong positive capability to add to Python. I wonder why the cold
reception. Were there problems with the idea itself or just the
implementation? Or is it just a low priority?

In any case, I guess it is still perfectly usable even if it isn't
part of the core Python. Has anyone used it? If so, how well did it
work? Thanks.



From steve at holdenweb.com  Wed Aug  1 12:45:58 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 01 Aug 2007 12:45:58 -0400
Subject: Time object?
In-Reply-To: <496954360708010918n22e525f8y1f453714a7d1155c@mail.gmail.com>
References: <496954360708010918n22e525f8y1f453714a7d1155c@mail.gmail.com>
Message-ID: <f8qdc8$prh$1@sea.gmane.org>

Robert Dailey wrote:
> Hi,
> 
> I'm well aware of the datetime module, however it is really inconsistent 
> and useless to me. In order to do any arithmetic on time objects, I have 
> to use the 'timedelta' class, which doesn't even allow me to do all the 
> math I want to do.
> 
> For example, I want to do "1 / timeobj", where timeobj might represent a 
> time in the format of "00:00:00.000000". Do I have to code my own class 
> for this, or is there some other third party library out there that will 
> allow me to do this?
> 
> Thanks.
> 
But surely all you really need is a function to convert a timedelta to 
seconds. Like:

secs(td):
   return (td.days*24*3600)+td.seconds+(td.microseconds/1000000.0)

So I don't really see the need for a third party library. It may be 
useless to you: have you considered that your use case might be 
non-standard? Or perhaps you just like to make things difficult.

Once you have your times in seconds then rate calculations are a piece 
of cake.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From ptmcg at austin.rr.com  Thu Aug 16 23:25:13 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Thu, 16 Aug 2007 20:25:13 -0700
Subject: defaultdict of arbitrary depth
Message-ID: <1187321113.841198.195100@22g2000hsm.googlegroups.com>

In responding to another post on defaultdict, I posted an
implementation of a 2-level hashtable, by creating a factory method
that returned a defaultdict(dict).  The OP of that other thread was
trying to build a nested tree from a set of n-tuples, in which the
first (n-1) values in each tuple were the keys for navigating down the
tree, and the final n'th value was the value for to be assigned to the
leaf node.  My post worked only if n=2, which fortunately was the test
case that the OP gave.  But it annoyed me that this required advance
knowledge of the number of keys.

I've hacked out this recursivedefaultdict which is a
defaultdict(defaultdict(defaultdict(...))), arbitrarily deep depending
on the keys provided in the reference.

Please comment.

-- Paul


from collections import defaultdict

data = [
    ('A','B','Z',1), ('A','C','Y',2), ('A','C','X',3),
    ('B','A','W',4), ('B','B','V',5), ('B','B','U',6),
    ('B','D','T',7),
    ]

class recursivedefaultdict(object):
    def __init__(self):
        self.__dd = defaultdict(recursivedefaultdict)
    def __getattr__(self,attr):
        return self.__dd.__getattribute__(attr)
    def __getitem__(self,*args):
        return self.__dd.__getitem__(*args)
    def __setitem__(self,*args):
        return self.__dd.__setitem__(*args)

table = recursivedefaultdict()

for k1,k2,k3,v in data:
    table[k1][k2][k3] = v

for kk in sorted(table.keys()):
    print "-",kk
    for jj in sorted(table[kk].keys()):
        print "  -",jj
        for ii in sorted(table[kk][jj].keys()):
            print "    -",ii,table[kk][jj][ii]

prints:
- A
  - B
    - Z 1
  - C
    - X 3
    - Y 2
- B
  - A
    - W 4
  - B
    - U 6
    - V 5
  - D
    - T 7



From rgrdev at gmail.com  Sat Aug  4 18:08:22 2007
From: rgrdev at gmail.com (rgrdev at gmail.com)
Date: Sun, 05 Aug 2007 00:08:22 +0200
Subject: the one python book
References: <mailman.1611.1186233912.22759.python-list@python.org>
	<b60ti.37345$G23.30474@newsreading01.news.tds.net>
	<1186240249.433185.291390@r34g2000hsd.googlegroups.com>
Message-ID: <86vebvx8a1.fsf@googlemail.com>

Michael Tobis <mtobis at gmail.com> writes:

> On Aug 4, 9:32 am, Neil Cerutti <horp... at yahoo.com> wrot
>
>> With Python, you won't find anything like that. Python is too
>> huge.
>
> That's silly. Python is small in the sense that C is small. The Python
> standard library is probably much bigger than the C standard library,
> but Kernghan and Richie don't cover it.

>
> K&R is a unique book. I have never seen anything comparable for any

That's very true.

> language. The closest Python equivalent is the official docs:
>
> http://docs.python.org/
>
> I think the core Python bookshelf is:
>
> Learning Python (Lutxz & Ascher) and/or
> Dive Into Python (Pilgrim) for tutorial

I can recommend (for a big fat reference at a good price) "Programming
Python" by Mark Lutz from O'Reilly.
>
> Python in a Nutshell (Martelli) AND
> Python Essential Reference (Beazley) for reference
>
> The latter two books are not perfect (both indexes are infuriating)
> but I usually find that I can find what I am looking for in one or the
> other.
>
> Like most people I eventually plan to read Moby Dick, War and Peace,
> and Lutz's Programming Python. Maybe when I retire.

Aha. You heard of it :-;

>
> mt
>

-- 


From nytrokiss at gmail.com  Wed Aug 29 17:32:44 2007
From: nytrokiss at gmail.com (James Matthews)
Date: Wed, 29 Aug 2007 14:32:44 -0700
Subject: Thread issue
Message-ID: <8a6b8e350708291432vcd444bfre769fcf07f60d2b2@mail.gmail.com>

Hi

I have a program that downloads webpages. The webpages are stored in a list
and i make each has it's own thread that downloads it. Sometimes the threads
exit (because urlopen() throws an exception) Now the question is how can i
recover from this thread failing


Example Code
from urllib import urlopen
import threading

threaded_object = []
urls= [url1,url2....]
for i in urls:
       do_thread = threading.Thread(target=urlopen,args=(url,))
        threaded_object.append(do_thread)
 for i in threaded_object:
        i.start()
    for i in threaded_object:
        i.join()

Thanks
James



-- 
http://www.goldwatches.com/
http://www.jewelerslounge.com
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From byte8bits at gmail.com  Tue Aug  7 17:45:46 2007
From: byte8bits at gmail.com (brad)
Date: Tue, 07 Aug 2007 17:45:46 -0400
Subject: passing vars to py scipts in cron jobs
Message-ID: <f9ap96$60d$1@solaris.cc.vt.edu>

What's the proper way to call a py script and pass in variables while 
doing cron jobs? I can run the scripts fine from idle, python, etc using 
raw_input() to prompt users. The scripts have classes with methods that 
need arguments. Here's an example... I want to run c1.d1(v,v,v) then 
c2.d2(v,v,v)

class c1:
   # User defined vars
    def d1(var1, var2, var3):
       pass

class c2:
    # User defined vars
    def d2(var1, var2, var3):
       pass

Thanks,
Brad


From horpner at yahoo.com  Mon Aug 20 13:01:26 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 20 Aug 2007 17:01:26 GMT
Subject: Newbee Question
References: <mailman.15.1187620149.26576.python-list@python.org>
Message-ID: <slrnfcjdlp.1tc.horpner@FIAD06.norwich.edu>

On 2007-08-20, HD1956 <hd7456 at hotmail.com> wrote:
> This is probably a simple code. I am a truck driver who gets
> paid by stops and cases. I am trying to figure out how to code
> my stop pay. I get 40 cents per stop up to 22 stops, and $1.40
> per stops after that. 

I wish *I* could make a deal like that. I stop working all the
time!

-- 
Neil Cerutti
Customers who consider our waitresses uncivil ought to see the manager --sign
at New York restaurant


From http  Thu Aug 16 02:15:23 2007
From: http (Paul Rubin)
Date: 15 Aug 2007 23:15:23 -0700
Subject: ElementTree surprise
References: <7xd4xoxf16.fsf@ruckus.brouhaha.com>
	<87bqd89gkd.fsf@wilson.homeunix.com>
Message-ID: <7x4pj0xax0.fsf@ruckus.brouhaha.com>

Torsten Bronger <bronger at physik.rwth-aachen.de> writes:
> >     <foo bar="parrot"></foo>
> Technically, text is nodes as all other element nodes.  In the
> parrot example, there is no empty textnode but no textnode at all.

That is required by the xml standard?  If yes, elementtree is doing
the right thing, but it surprises me, I would have expected an empty
string.  Thanks.


From david at nospam.spam  Mon Aug 13 22:26:31 2007
From: david at nospam.spam (david)
Date: Tue, 14 Aug 2007 12:26:31 +1000
Subject: pyserial win32 port numbering
Message-ID: <13c24mlatu3kuef@corp.supernews.com>

http://pyserial.sourceforge.net/

"port numbering starts at zero, no need to
know the port name in the user program"


But the implementation in SerialWin32 is
just
	(Portnum +1)


So there is no 'start' to the port numbering at all:
there is no assurance that you will have a pySerial
serial port Zero, even if you have 57 Windows Serial
ports.


Renumbering the serial ports to start at zero would sort of make sense 
if it was done in a semi-portable way - so you could move from one 
machine with two serial ports to another machine with two serial ports.

In Windows, that requires enumerating the serial ports, and assigning a 
logical pySerial port number to each.

This is going to become more of a problem, because Windows logo 
compliant PC's by definition do not have a serial port 1 or 2 so the 
pySerial logical port numbers are likely to start at 2 or 4.

It's already a problem on PC's that have PCI serial port cards (not ISA 
serial port cards). The pySerial logical port numbering typically goes 
something like 0, 4,5, mapping the Windows serial ports 1,5,6

(david)


From iclark at mail.ewu.edu  Wed Aug  1 12:54:22 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Wed, 01 Aug 2007 09:54:22 -0700
Subject: Awkward format string
In-Reply-To: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
References: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
Message-ID: <f8qdru$ri5$1@sea.gmane.org>

beginner wrote:
> Hi,
> 
> In order to print out the contents of a list, sometimes I have to use
> very awkward constructions. For example, I have to convert the
> datetime.datetime type to string first, construct a new list, and then
> send it to print. The following is an example.
> 
> 	x=(e[0].strftime("%Y-%m-%d"), e[1].strftime("%Y-%m-%d"))+e[2:]
> 	print  >>f, "%s\t%s\t%d\t%f\t%f\t%f\t%d" % x
> 
> e is a tuple. x is my new tuple.
> 
> Does anyone know better ways of handling this?
> 
> Thanks,
> Geoffrey
> 

>>> import datetime
>>> old_tuple = (
...     datetime.datetime(2007, 8, 1),
...     datetime.datetime(2007, 8, 2),
...     1,
...     2.0,
...     3.0,
...     4
... )
>>> first_date = old_tuple[0].strftime('%Y-%m-%d')
>>> second_date = old_tuple[1].strftime('%Y-%m-%d')
>>> new_tuple = (first_date, second_date) + old_tuple[2:]
>>> print '\t'.join(str(i) for i in new_tuple)
2007-08-01      2007-08-02      1       2.0     3.0     4

Without more information that's the best I can think of.

Ian



From steve at holdenweb.com  Fri Aug 31 14:37:40 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 14:37:40 -0400
Subject: strings (dollar.cents) into floats
In-Reply-To: <4866bea60708310928nf54e60dqdd207ccafa8b8a6e@mail.gmail.com>
References: <mailman.140.1188483282.28954.python-list@python.org>	<877incd20i.fsf@benfinney.id.au>	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>	<1188575044.874256.42960@50g2000hsm.googlegroups.com>	<fb9eas$tnc$1@sea.gmane.org>
	<4866bea60708310928nf54e60dqdd207ccafa8b8a6e@mail.gmail.com>
Message-ID: <fb9n5o$rfk$1@sea.gmane.org>

Chris Mellon wrote:
> On 8/31/07, Steve Holden <steve at holdenweb.com> wrote:
>> sturlamolden wrote:
>>> On 31 Aug, 02:12, Wildemar Wildenburger
>>> <lasses_w... at klapptsowieso.net> wrote:
>>>
>>>> I've heard (ok, read) that several times now and I understand the
>>>> argument. But what use is there for floats, then? When is it OK to use them?
>>> There are fractions that can be exactly represented by floats that
>>> cannot be exactly represented by decimals.
>> Would you care to give an example?
>>
>>> There are fractions that
>>> can be exactly represented by decimals that cannot be exactly
>>> represented by floats.
>>>
>>> Which one is better? Which do we prefer?
>>>
>>> What a float cannot do is to represent a decimal fractional number
>>> (e.g. 1.1) exactly. If we need that, we cannot use floats. A notable
>>> example is monetary computations, it covers 99% of the use for decimal
>>> numbers in computers. For this reason, we should never use floats to
>>> add 10 cents to a dollar. The use of decimals for monetary
>>> calculations is mandatory.
>>>
>> That last sentence is patent nonsense, and completely untrue. Many
>> satisfactory financial applications have been written using only
>> floating-point arithmetic. Indeed I believe the accountant's Swiss army
>> knife, the Excel spreadsheet, uses floating-point numbers exclusively.
>>
> This is true, although Excel munges it's FP to provide "expected" results.
> 
> It depends on what you consider a "financial" application though.
> Excel, while in extremely broad use, is not used to implement any of
> the systems which actually "define" money, like the back end financial
> systems at banks and credit unions.
> 
> In my experience, by far the most common method of calculating
> financial numbers is actually using integer amounts, and then applying
> well-defined rounding rules which I can't be bothered to look up the
> name for.
> 
> For what it's worth, the work that I do with money (which is
> middleware doing data transport, not calculations or billing) uses
> either string representations or fixed point.
> 
>> What you say about floating-point have speed advantages is true, but you
>> go too far in claiming that decimal arithmetic is mandatory for monetary
>> calculations. That's about as sensible as saying that base 12 and base
>> 20 arithmetic units were required to calculate in pounds, shillings and
>> pence.
>>
> 
> I believe that to the degree that "real" accounting was done in those
> currencies it did in fact use non-decimal bases. Just as people don't
> use decimal time values (except us crazy computer folk), you're write
> 1 pound 4 shillings, not 1.333... pounds.

There is much in what you say (which, I am happy to note, doesn't really 
contradict much of what I wrote). While I agree that Excel isn't a 
fundamental component of back-end financial systems you might be 
surprised at just how many people rely on its "currency" cells for 
financial applications, albeit of a more lightweight kind.

You let yourself down just a little right at the end by not knowing the 
intricacies of the old sterling currency - since there were twenty 
shillings to the pound and twelve pennies to a shilling that would have 
been ?1.2. However, you are correct in assuming that nobody tried to 
represent ?1 3s. 4d. as 23.333... shillings.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From vedrandekovic at v-programs.com  Wed Aug 22 09:04:36 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Wed, 22 Aug 2007 06:04:36 -0700
Subject: redirect or cover .bat log
In-Reply-To: <5j2br6F3r2avsU1@mid.uni-berlin.de>
References: <1187764689.836375.212730@z24g2000prh.googlegroups.com>
	<5j26bvF3s7lbpU2@mid.uni-berlin.de>
	<1187767578.925671.107000@q4g2000prc.googlegroups.com>
	<5j2br6F3r2avsU1@mid.uni-berlin.de>
Message-ID: <1187787876.962883.66970@r34g2000hsd.googlegroups.com>

On 22 kol, 10:52, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>  vedrandeko... at v-programs.com wrote:
> > On 22 kol, 09:19, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >> vedrandeko... at v-programs.com schrieb:
>
> >> > Hello,
>
> >> > e.g I need run my my_scripts_setup.bat that contain:
>
> >> > python myscript_setup.py py2exe
>
> >> > Can I cover or redirect log of that process into my wx program?
> >> > I'am using Windows XP SP2, and Python 2.5.
>
> >> Who's running the bat, and who's running the wx program?
>
> >> Diez
>
> > Hi,
>
> > First I convert my main wx program to exe with my py2exe setup,then
> > under my main program (exe),
> > I must run that .bat file and redirect or cover that process.
>
> Still not very clear. But running a bat-file should be possible with the
> subprocess module that also has facilities to grab stdout of the child
> process.
>
> Diez

Hi,

Can I execute one .bat file (without opening .bat window) just execute
commands
and log process redirect with sys.stdout or something in my wx window?

Is this clear enough?

Have you any other solutions for this?

Regards,
Vedran



From eggie5 at gmail.com  Thu Aug  9 21:13:24 2007
From: eggie5 at gmail.com (eggie5)
Date: Fri, 10 Aug 2007 01:13:24 -0000
Subject: beginner whitespace question
In-Reply-To: <1186707164.095766.243480@q3g2000prf.googlegroups.com>
References: <1186703261.136506.208660@x35g2000prf.googlegroups.com>
	<1186703525.591462.122140@m37g2000prh.googlegroups.com>
	<1186704161.334597.218750@z24g2000prh.googlegroups.com>
	<1186707164.095766.243480@q3g2000prf.googlegroups.com>
Message-ID: <1186708404.901323.204730@g12g2000prg.googlegroups.com>

But this still isn't valid:

from django.db import models

class Poll(models.Model):
	question = models.CharField(max_length=200)
	pub_date = models.DateTimeField('date published')

    def __unicode__(self):
		return self.question



class Choice(models.Model):
    poll = models.ForeignKey(Poll)
    choice = models.CharField(max_length=200)
    votes = models.IntegerField()

    def __unicode__(self):
		return self.choice


On Aug 9, 5:52 pm, Dan Bishop <danb... at yahoo.com> wrote:
> On Aug 9, 7:02 pm, eggie5 <egg... at gmail.com> wrote:
>
>
>
> > On Aug 9, 4:52 pm, Dan Bishop <danb... at yahoo.com> wrote:
>
> > > On Aug 9, 6:47 pm, eggie5 <egg... at gmail.com> wrote:
>
> > > > I keep getting an error for line 7, what's wrong with this?
>
> > > > from django.db import models
>
> > > > class Poll(models.Model):
> > > >     question = models.CharField(max_length=200)
> > > >     pub_date = models.DateTimeField('date published')
>
> > > >         def __unicode__(self):
> > > >                 return self.question
>
> > > The "def" statements have to be at the same indentation level as
> > > what's before it.
>
> > will they still be a part of the classes?
>
> If you indent them twice, it's a syntax error.
> If you indent them once, they'll be methods of the class.
> If you don't indent them at all, they'll be global functions.




From erfc at caballista.org  Sat Aug 18 10:41:43 2007
From: erfc at caballista.org (Art Deco)
Date: Sat, 18 Aug 2007 08:41:43 -0600
Subject: What does this thread have to do with classical music,
References: <7nnh7350b5h25ghocra72b23mmsnnkj8bh@4ax.com>
	<469392cd$0$97226$892e7fe2@authen.yellow.readfreenews.net>
	<469445b3$0$4819$8f2e0ebb@news.shared-secrets.com>
	<4694e124$0$97214$892e7fe2@authen.yellow.readfreenews.net>
	<46957ef1$0$10227$8f2e0ebb@news.shared-secrets.com>
	<46963170$0$97261$892e7fe2@authen.yellow.readfreenews.net>
	<46981df7$0$12095$8f2e0ebb@news.shared-secrets.com>
	<46990784$0$97223$892e7fe2@authen.yellow.readfreenews.net>
	<4699297c$0$4706$4c368faf@roadrunner.com>
	<140720071431044860%erfc@caballista.org>
	<46a3a1a7$0$15115$8f2e0ebb@news.shared-secrets.com>
	<220720072148091069%erfc@caballista.org>
	<46a5385d$0$4832$8f2e0ebb@news.shared-secrets.com>
	<250720071834457296%erfc@caballista.org>
	<46aceaa5$0$13281$8f2e0ebb@news.shared-secrets.com>
	<290720071853200863%erfc@caballista.org>
	<46b12539$0$4807$8f2e0ebb@news.shared-secrets.com>
	<010820072033374341%erfc@caballista.org>
	<46c63474$0$4844$8f2e0ebb@news.shared-secrets.com>
Message-ID: <180820070841431634%erfc@caballista.org>

ah <splifingate at gmail.com> wrote:
>Art Deco wrote:
>> ah <splifingate at gmail.com> wrote:
>>>Art Deco wrote:
>>>> ah <splifingate at gmail.com> wrote:
>>>>>Art Deco wrote:
>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>Art Deco wrote:
>>>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>>>Art Deco wrote:
>>>>>>>>>> Who wrote?
>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>>>> 
>>>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>>>> 
>>>>>>>>>> How many more times will you be asking the same tired, lame
>>>>>>>>>> questions,
>>>>>>>>>> Tholen?
>>>>>>>>>
>>>>>>>>>Till 2056?
>>>>>>>> 
>>>>>>>> At that point, he will have made the Thirty Years Pset War look like
>>>>>>>> 1967 in the Sinai.
>>>>>>>
>>>>>>>It must have been Hell to keep a garden during those times.
>>>>>>>
>>>>>>>Did they all eat jerky, or what?
>>>>>> 
>>>>>> Worse -- worm-laden hardtack.
>>>>>
>>>>>Luxury!
>>>>>
>>>>>Why, I remember when I was a lad . . . we used to watch the local churls
>>>>>across the fences eating that well.
>>>>>
>>>>>We only had millings (and (occasionally) water) on Tuesdays and Fridays.
>>>> 
>>>> Grog and hardtack, life is good!
>>>
>>>?Viva la basura!
>> 
>> Vivat les ordures!
>
>Vivara los trunctiato!

das Leben ist gut!

-- 
Official Overseer of Kooks and Saucerheads for alt.astronomy
Trainer and leash holder of:
  Honest "Clockbrain" John
  nightbat "fro0tbat" of alt.astronomy
  Tom "TommY Crackpotter" Potter
  <http://www.caballista.org/auk/kookle.php?search=deco>

"You really are one of the litsiest people I know, Mr. Deco."
  --Kali, quoted endlessly by David Tholen as evidence of "something"

"I am claiming that you believe ah's family name is "ah",
Deco, and I substantiated that claim."
  --David Tholen

"Quite a kook-out, Deco.  You've been frothing even more
ever since I demonstrated how you believe that ah's family
name is "ah"."
  --David Tholen


From pyth0nc0d3r at gmail.com  Thu Aug 23 16:09:15 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Thu, 23 Aug 2007 15:09:15 -0500
Subject: Putting #'s and variables together in 1 variable
Message-ID: <eb79828c0708231309g7a7dd38fpb6dad836b8552cb0@mail.gmail.com>

  File "Desktop\python\newsystem\init.py", line 51, in random_n
    random_name = a+b+c+d+e+ 'temp.txt'
TypeError: unsupported operand type(s) for +: 'int' and 'str'

import random
def random_name():
    a = random.randint(0,9)
    b = random.randint(0,9)
    c = random.randint(0,9)
    d = random.randint(0,9)
    e = random.randint(0,9)
    random_name = a+b+c+d+e+ 'temp.txt'
    return random_name
print random_name

How can i make it so that it adds the random numbers and the temp.txt to
random_name variable w/out causing any error?
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From seancron at gmail.com  Fri Aug 31 19:06:22 2007
From: seancron at gmail.com (seancron)
Date: Fri, 31 Aug 2007 23:06:22 -0000
Subject: parsing response from SOAPpy request
Message-ID: <1188601582.917623.122890@r29g2000hsg.googlegroups.com>

I'm using SOAPpy to access weather data from the NOAA National Digital
Forecast Database XML Web Service [1] and I've been having
trouble figuring out how to parse the data.

The response comes back as XML document but when I check it with
type(result) it shows the the response is a string.  Does anyone have
any
suggestions on getting relevant data?

Thanks,
-Sean

[1] http://www.weather.gov/forecasts/xml/



From llasram at gmail.com  Wed Aug 15 18:37:53 2007
From: llasram at gmail.com (Marshall T. Vandegrift)
Date: Wed, 15 Aug 2007 18:37:53 -0400
Subject: Coroutines and argument tupling
References: <mailman.2032.1187207899.22759.python-list@python.org>
	<5ih63mF3pvnt7U1@mid.individual.net>
Message-ID: <87k5rwo24e.fsf@seneca.iss.local>

Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:

>> I'm trying to write a decorator which allows one to produce simple
>> coroutines by just writing a function as a generator expression
>> which re-receives it's arguments as a tuple from each yield.  
>
> May I ask why? Passing it the same arguments over and over is no
> use; and there is the send method.

That's what I meant.  The wrapper produced by the decorator passes the
arguments back into the generator as a tuple via the `send' method.

>> The ugliness of the ArgPacker class makes me suspect that I should
>> perhaps just manually create and track a generator when I need a
>> function with generator-like properties.
>
> What do you mean? I don't quite understand why you'd have to "track"
> a generator for getting generator-like properties.

Using the trivial `nextn' example from my original post with my
decorator lets you do just:

    print nextn(2)    # => [0, 1]
    print nextn(3)    # => [2, 3, 4]
    print nextn()     # => [5]

Without the decorator that becomes:

    gen = nextn(2)
    print gen.next()  # => [0, 1] 
    print gen.send(3) # => [2, 3, 4]
    print gen.send(1) # => [5]

The former is just that smidgen nicer, and allows you to continue to
make use of argument defaults and varadic arguments if so desired.

-Marshall


From deets at nospam.web.de  Fri Aug 10 06:41:46 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 10 Aug 2007 12:41:46 +0200
Subject: Smoother Lines in Turtle Graphics
References: <1186703789.695265.52390@e9g2000prf.googlegroups.com>
Message-ID: <5i2tnaF3mgsofU1@mid.uni-berlin.de>

tomy wrote:

> Hi All
> I am a newbie to turtle graphics in python, so sorry if you find this
> question too easy.
> How can I get smoother lines in turtle graphics?
> I am using python on windows.

What turtle graphics? I'm not aware that there is some
standard-turtle-graphics available, so it might be a problem of your
turtle-graphics-package.

Diez


From robert.kern at gmail.com  Mon Aug 20 17:34:14 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 20 Aug 2007 16:34:14 -0500
Subject: datetime in microseconds
In-Reply-To: <496954360708201401p2ffcc37fjc24aabfb95224ec2@mail.gmail.com>
References: <1187610776.755796.170990@r29g2000hsg.googlegroups.com>	<1187615746.655162.295570@z24g2000prh.googlegroups.com>	<1187619423.715120.293660@o80g2000hse.googlegroups.com>	<1187621922.387688.77090@50g2000hsm.googlegroups.com>
	<496954360708201401p2ffcc37fjc24aabfb95224ec2@mail.gmail.com>
Message-ID: <fad1cm$276$1@sea.gmane.org>

Robert Dailey wrote:
> A small off topic question. Why use divmod() instead of the modulus
> operator?

Because he needed both the quotient and the remainder. % only gives you the
remainder.

-- 
Robert Kern

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



From greg at cosc.canterbury.ac.nz  Fri Aug 10 04:28:52 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Fri, 10 Aug 2007 20:28:52 +1200
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <mailman.1774.1186635086.22759.python-list@python.org>
References: <87bqdlswbn.fsf@pobox.com>	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com>	<46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>	<mailman.1660.1186380664.22759.python-list@python.org>	<7xzm15q8fy.fsf@ruckus.brouhaha.com>	<1186583168.447608.114040@d55g2000hsg.googlegroups.com>	<5hv7jeF3m75aqU1@mid.individual.net>
	<mailman.1774.1186635086.22759.python-list@python.org>
Message-ID: <5i2m5bF3mfk4rU1@mid.individual.net>

Evan Klitzke wrote:

> You can easily modify print in a safe way.

Yes, but you'd still have to replace the builtin print
function with your own to get it used by non-cooperative
code. That doesn't seem to gain you much over replacing
sys.stdout with something that intercepts and logs
stuff written to it.

 > What do you find wrong with this sort of "monkeypatching"?

At least sys.stdout was designed somewhat with the
possibility of replacing it in mind. It's not an
entirely unexpected thing to do. Replacing something
in the builtin namespace seems like a more drastic
step, somehow.

--
Greg


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Aug  7 03:28:21 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 07 Aug 2007 09:28:21 +0200
Subject: help with flexible decorators
In-Reply-To: <1186452596.052963.136840@e9g2000prf.googlegroups.com>
References: <1186452596.052963.136840@e9g2000prf.googlegroups.com>
Message-ID: <46b81efd$0$21527$426a74cc@news.free.fr>

james_027 a ?crit :
> Hi,
> 
> I want to write a flexible decorators to edit a function that may have
> 1 or more arguments...
> 
> def enhance(func):
>     def new(x):
>         #do something ...
>         return func(x)
>     return new
> 
> @enhance
> def method_a(x):
>     #do something ...
> 
> While the enhance decorator work with functions of 1 argument, how do
> I make it to work with more than one arguments.

Use *args (for positional args) and **kw (for keyword args):

def enhance(func):
     def new(*args, **kw):
         #do something ...
         return func(*args, **kw)
     return new

@enhance
def method_a(x):
     #do something ...


HTH


From rcdailey at gmail.com  Mon Aug 20 12:05:31 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 20 Aug 2007 11:05:31 -0500
Subject: str().join() isn't working
Message-ID: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com>

Hi,

First have a look at the following code:


In main.py:
-----------------------------------------------------------------------------------
    space = " "

    includes = space.join( system._user_includes ) + " " + space.join(
system._system_includes )


In system.py:
-----------------------------------------------------------------------------------
_user_includes = [
    ]

_system_includes = [
    ]


The above does not work. The interpreter states: "TypeError: sequence item
0: expected string, list found". I'm not sure what this means. Can anyone
help me figure out what I'm doing wrong? Thanks.

PS: I've also tried putting strings in the lists above just to make sure
that them being empty wasn't the problem. I got no different results.
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From raims at dot.com  Sun Aug 26 12:58:41 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Sun, 26 Aug 2007 18:58:41 +0200
Subject: New UI Toolkit
References: <1188146822.129605.160560@22g2000hsm.googlegroups.com>
Message-ID: <1i3gv8x.nexgi71dartryN%raims@dot.com>

Gerdus van Zyl <gerdusvanzyl at gmail.com> wrote:
> Please reply and let your thoughts be known. Is there a need for a new
> GUI library for python?

I think there's no real point in answering this question. You developed
a new toolkit because, I'm guessing, you are not fully satisfied by the
current ones. In my personal opinion there's no *need* for another
toolkit but there is *room* for one, two, hundreds of new toolkits.
That's what freedom is for.

:-)

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From fred.sells at adventistcare.org  Tue Aug 28 13:51:19 2007
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Tue, 28 Aug 2007 13:51:19 -0400
Subject: Filemaker interactions
In-Reply-To: <46D092AF.80800@egenix.com>
Message-ID: <0A53725C4A497848A7B3A0874B2598313D3879@acesxch01.ADVENTISTCORP.NET>

filemaker 8.0 (Pro I think) has a web page generator.  That's all I
know, since I didn't really need it.

> -----Original Message-----
> From: python-list-bounces+frsells=adventistcare.org at python.org
> [mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
> Behalf Of M.-A. Lemburg
> Sent: Saturday, August 25, 2007 4:36 PM
> To: Ian Witham
> Cc: python-list at python.org
> Subject: Re: Filemaker interactions
> 
> 
> On 2007-08-01 23:41, Ian Witham wrote:
> > Hello,
> > 
> > I'm hoping someone here can put me on the right track with 
> some broad
> > concepts here.
> > 
> > What I am hoping to achieve is a simple HTML page to be served over
> > our company LAN, into which the users (Real Estate Agents) 
> can enter a
> > property address or reference number.
> > 
> > My next thought was to have a Python CGI script query our filemaker
> > database of property listings, construct a PDF from the relevant
> > information, and finally return this PDF to the user.
> > 
> > At no stage do I want the user to have unfettered access to the
> > database or the ability to alter/delete records.
> > 
> > My question is: what is the most appropriate way for my script to
> > interact with Filemaker? Can this be done with Filemaker Pro 6?
> > 
> > According to the Filemaker Help, the "Local Data Access Companion"
> > shares the FileMaker Pro database with ODBC-compliant 
> applications on
> > the same computer. Is this the right option?
> > 
> > Can my CGI script be an ODBC client? How? Would it need to be
> > Filemaker specific code or does ODBC have a standardised format?
> > 
> > I'm grateful for any advice and a nudge in the right direction.
> 
> You could try our mxODBC extension for Python which will
> likely just work out of the box:
> 
> https://www.egenix.com/products/python/mxODBC/
> 
> with the Filemaker ODBC driver.
> 
> Or give this module a try (if you have more time at hand
> and can do without a DB-API interface):
> 
> http://www.lfd.uci.edu/~gohlke/code/filemaker.py.html
> 
> It uses Filemaker's XML interface.
> 
> -- 
> Marc-Andre Lemburg
> eGenix.com
> 
> Professional Python Services directly from the Source  (#1, 
> Aug 25 2007)
> >>> Python/Zope Consulting and Support ...        
> http://www.egenix.com/
> >>> mxODBC.Zope.Database.Adapter ...             
> http://zope.egenix.com/
> >>> mxODBC, mxDateTime, mxTextTools ...        
> http://python.egenix.com/
> ______________________________________________________________
> __________
> 
> :::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for 
> free ! ::::
> 
> 
>    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
>     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
>            Registered at Amtsgericht Duesseldorf: HRB 46611
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 


From gagsl-py2 at yahoo.com.ar  Wed Aug 22 23:46:46 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 23 Aug 2007 00:46:46 -0300
Subject: ctypes and unsigned char*
References: <1187545486.797017.308720@a39g2000hsc.googlegroups.com>
	<1187548845.674582.69630@w3g2000hsg.googlegroups.com>
	<1187609450.542644.50430@w3g2000hsg.googlegroups.com>
Message-ID: <op.txht38gvx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 20 Aug 2007 08:30:50 -0300, oliver.andrich at gmail.com  
<oliver.andrich at gmail.com> escribi?:

> On 19 Aug., 20:40, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
>> In the first case, use a plain c_char_p - the individual "chars" are
>> already unsigned in Python (that is, ord(xxx[i]) is always positive)
>> In the second case, first define the pointer type:
>>
>> c_ubyte_p = POINTER(c_ubyte)
>> your_function.restype = c_ubyte_p
>
> I will have to look into that. My function I want to wrap has the
> following signature
>
> unsigned char *MagickGetImageProfile(MagickWand *wand,const char
> *name,
>     size_t *length)
>
> Well, the first argument and the second are straight forward, and work
> as expected. The last argument also works and it should take up the
> length of the string (unsigned char *). If I now do

So, if I understand correctly, after the call, *length will contain the  
length of the buffer pointed by the function result.

> dll.MagickGetImageProfile.restype = c_char_p
> result = dll.MagickGetImageProfile(wand, "8bim", byref(length))
>
> result is either an empty string or a 3 bytes long string, while
> length containes the correct length of 1086 bytes for example. I also
> tried

If the result can contain nul bytes, you have to specify its size  
explicitely (else it will be truncated at the first zero). Use the  
string_at utility function:

result_str = string_at(result, length)

(That should work fine, I presume...)

-- 
Gabriel Genellina



From thorsten at thorstenkampe.de  Sat Aug 11 01:32:24 2007
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Sat, 11 Aug 2007 13:32:24 +0800
Subject: python 2.5 bug
References: <1186825286.493878.80380@l70g2000hse.googlegroups.com>
Message-ID: <MPG.2127cabf99116e6a9896fe@news.individual.de>

*  (Sat, 11 Aug 2007 02:41:26 -0700)
> I was install Python 2.5 and uninstall Python 2.4 now I cannot run my
> scripts, only from idle
> 
> What should I do?

1. read "How To Ask Questions The Smart Way"[1]

2. read "How to Report Bugs Effectively"[2]

3. don't call something a "bug" if the "bug" is likely the person
   sitting in front of your computer

4. don't do something you don't fully understand (in this case
   installing Python 2.5 and uninstalling Python 2.4)


Thorsten
[1] http://catb.org/~esr/faqs/smart-questions.html
[2] http://www.chiark.greenend.org.uk/~sgtatham/bugs.html


From unlikeablePorpoise at gmail.com  Mon Aug 13 17:21:10 2007
From: unlikeablePorpoise at gmail.com (unlikeablePorpoise at gmail.com)
Date: Mon, 13 Aug 2007 14:21:10 -0700
Subject: JPype - passing to Java main
Message-ID: <1187040070.806416.75090@r34g2000hsd.googlegroups.com>

I am trying to get JPype to pass a String into a Java class main
function. Demonstration code below:

=============JAVA============
package com;

public class JPypeTest {

   public static void main(String args[]) {
	   System.out.println(args[0]);
   }

   public void printArgument(String arg) {
	   System.out.println(arg);
   }
}

===========PYTHON===========
from jpype import *

startJVM("C:/Program Files/Java/jdk1.5.0_12/jre/bin/server/jvm.dll","-
Djava.class.path=C:/jpypetest/test/")

com = JPackage("com");
jp = com.JPypeTest();
jp.printArgument('XXXX');
#WANT TO CALL main("arg") HERE!!!!
shutdownJVM()
===============================

What I want is to be able to call main() with an argument from the
python file (using JPype) and have it echo
args[0]. I can get this to work for printArgument(), but not for
main().

Thanks,
Sarah



From deets at nospam.web.de  Wed Aug 29 04:48:25 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 29 Aug 2007 10:48:25 +0200
Subject: encoding problems
References: <46d5215b$0$411$426a74cc@news.free.fr>
Message-ID: <5jkq6pF27cfU1@mid.uni-berlin.de>

tool69 wrote:

> Hi,
> 
> I would like to transform reST contents to HTML, but got problems
> with accented chars.
> 
> Here's a rather simplified version using SVN Docutils 0.5:
> 
> %-------------------------------------------------------------
> 
> #!/usr/bin/env python
> # -*- coding: utf-8 -*-


This declaration only affects unicode-literals.

> from docutils.core import publish_parts
> 
> class Post(object):
>      def __init__(self, title='', content=''):
>          self.title = title
>          self.content = content
> 
>      def _get_html_content(self):
>          return publish_parts(self.content,
>              writer_name="html")["html_body"]
>      html_content = property(_get_html_content)

Did you know that you can do this like this:

@property
def html_content(self):
    ...

?

> # Instanciate 2 Post objects
> p1 = Post()
> p1.title = "First post without accented chars"
> p1.content = """This is the first.
> ...blabla
> ... end of post..."""
> 
> p2 = Post()
> p2.title = "Second post with accented chars"
> p2.content = """Ce poste poss?de des accents : ? ? ? ?"""


This needs to be a unicode-literal:

p2.content = u"""Ce poste poss?de des accents : ? ? ? ?"""

Note the u in front.
 
> for post in [p1,p2]:
>      print post.title, "\n" +"-"*30
>      print post.html_content
> 
> %-------------------------------------------------------------
> 
> The output gives me :
> 
> First post without accented chars
> ------------------------------
> <div class="document">
> <p>This is the first.
> ...blabla
> ... end of post...</p>
> </div>
> 
> Second post with accented chars
> ------------------------------
> Traceback (most recent call last):
> File "C:\Documents and
> Settings\kib\Bureau\Projets\python\dbTest\rest_error.py", line 30, in
> <module>
> print post.html_content
> UnicodeEncodeError: 'ascii' codec can't encode character u'\xe8' in
> position 39:
> ordinal not in range(128)

You need to encode a unicode-string into the encoding you want it.
Otherwise, the default (ascii) is taken.

So 

print post.html_content.encodec("utf-8")

should work.

Diez


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 24 03:48:24 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 24 Aug 2007 09:48:24 +0200
Subject: beginner, idomatic python 2
In-Reply-To: <13csjmeaoqh9le3@corp.supernews.com>
References: <13csjmeaoqh9le3@corp.supernews.com>
Message-ID: <46ce8d0c$0$410$426a74cc@news.free.fr>

bambam a ?crit :
> Would someone like to suggest a replacement for this? This is a
> function that returns different kinds of similar objects, depending
> on what is asked for. PSP and PWR are classes.  I don't really
> want to re-write the calling code very much: I'm just wondering
> if the function can be replaced with some kind of OOP pattern.

Dan already answered to this. Just as a side note, and since you're 
trying to be "idiomatic", Python's naming convention is to use all_lower 
for functions, MixedCaps for classes (except - mostly for historical 
reasons - the builtin types...), and ALL_LOWER for symbolic (pseudo) 
constants.


> def Device(DeviceType):
>     if DeviceType=='PSP':
>         return PSP()
>     elif DeviceType=="Power Supply"
>         return PWR()
>     etc...
> 
> 
> Thanks! 
> 
> 


From wojciech_mula at poczta.null.onet.pl.invalid  Thu Aug  2 15:16:39 2007
From: wojciech_mula at poczta.null.onet.pl.invalid (Wojciech =?iso-8859-2?Q?Mu=B3a?=)
Date: Thu, 2 Aug 2007 19:16:39 +0000 (UTC)
Subject: Memory Leak with Tkinter Canvas (Python 2.5 Win32)
References: <1186068851.011344.322980@i13g2000prf.googlegroups.com>
Message-ID: <slrnfb4bb1.2ks.wojciech_mula@cat.tac>

frikk wrote:
> [...]
> As you can see- I am doing nothing other than drawing a lot of
> rectangles on the canvas.

You aren't drawing, but **creating** rectangle objects, as
a meth. name suggests.  You find more info at tkinter.effbot.org.

> [...]
>
> def clear_grid():

      canv.delete(ALL)
     
>     for i in range(0,HEIGHT/10):
>         for j in range(0, HEIGHT/10):
>             canv.create_rectangle(i*10,j*10, \
>                                   i*10+10, j*10+10, \
>                                   fill = "white")

w.


From mark at mailinator.com  Sun Aug 26 06:23:05 2007
From: mark at mailinator.com (Mark)
Date: 26 Aug 2007 10:23:05 GMT
Subject: Using Regular Expresions to change .htm to .php in files
References: <1187896823.843419.53220@q3g2000prf.googlegroups.com>
	<46cdd386$0$27392$88260bb3@free.teranews.com>
Message-ID: <pan.2007.08.26.10.23.05@mailinator.com>

On Thu, 23 Aug 2007 12:27:10 -0700, Tobiah wrote:
> sed "s/.htm/.php/g" < $each > /tmp/$$

This line should be:

sed "s/\.htm$/.php/g" < $each > /tmp/$$



From bj_666 at gmx.net  Tue Aug  7 02:11:28 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Aug 2007 06:11:28 GMT
Subject: How to use C enum in Python CTypes?
References: <1186462639.872254.25660@z24g2000prh.googlegroups.com>
Message-ID: <5hqgogF3ldifeU1@mid.uni-berlin.de>

On Tue, 07 Aug 2007 04:57:19 +0000, rozniy wrote:

> typedef enum olss_tag
>    {
>    OLSS_AD,
>    OLSS_DA,
>    OLSS_DIN,
>    OLSS_DOUT,
>    OLSS_SRL,
>    OLSS_CT
>    }
> OLSS;
> 
> I managed to fudge the HDEV, UINT and PHDASS types as CTypes c_long(),
> but I am not sure how translate a C enum into Python...
> 
> This site
> http://python.net/crew/theller/ctypes/tutorial.html#bugs-todo-and-non-implemented-things
> 
> says that enumeration types is not implemented,
> "Enumeration types are not implemented. You can do it easily yourself,
> using c_int as the base class."

I would just define constants:

(OLSS_AD,
 OLSS_DA,
 OLSS_DIN,
 OLSS_DOUT,
 OLSS_SRL,
 OLSS_CT) = map(ctypes.c_int, xrange(6))

Ciao,
	Marc 'BlackJack' Rintsch


From paul at boddie.org.uk  Thu Aug  2 18:58:08 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Thu, 02 Aug 2007 15:58:08 -0700
Subject: __call__ considered harmful or indispensable?
In-Reply-To: <46b24200$0$19638$426a74cc@news.free.fr>
References: <mailman.1527.1186079415.22759.python-list@python.org>
	<46b24200$0$19638$426a74cc@news.free.fr>
Message-ID: <1186095488.781935.313350@e16g2000pri.googlegroups.com>

Bruno Desthuilliers wrote:
>
> Most of what you can do with a callable instance can be done with
> closures (and is usually done so in FPLs), but given Python's OO nature,
> it's sometimes clearer and simpler to use callable instances than
> closures.

Indeed. I think __call__ has been neglected as closures have become
more widely used. In all cynicism, however, I'd argue that with
Python's very usable implementation of object-orientation, classes
with __call__ methods frequently make for clearer demonstrations of
solutions than closures do, despite requiring slightly more characters
of source code, and in contrast to the apparent fashion for using
closures for showing off more or less everything these days (despite
various pitfalls which may seem counter-intuitive to the beginner).

Paul



From carsten at uniqsys.com  Fri Aug 31 07:35:52 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 31 Aug 2007 07:35:52 -0400
Subject: list index()
In-Reply-To: <1188534823.558722.212480@l22g2000prc.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<87bqcod2gq.fsf@benfinney.id.au>
	<1188517370.998114.119940@q4g2000prc.googlegroups.com>
	<mailman.179.1188521931.28954.python-list@python.org>
	<1188530220.815429.281380@i38g2000prf.googlegroups.com>
	<mailman.183.1188533232.28954.python-list@python.org>
	<1188534823.558722.212480@l22g2000prc.googlegroups.com>
Message-ID: <20070831112153.M28189@uniqsys.com>

On Thu, 30 Aug 2007 21:33:43 -0700, TheFlyingDutchman wrote
> On Aug 30, 9:06 pm, "Carsten Haese" <cars... at uniqsys.com> wrote:
> > On Thu, 30 Aug 2007 20:17:00 -0700, zzbbaadd wrote
> >
> > > Well IN was what I was looking for and would have saved this thread.
> > > However I don't believe IN showed up on the doc web page that has
> > > list methods, where I found index().
> >
> > They're not on the exact same page, but index() is in section 3.6.4 of the
> > library reference (http://docs.python.org/lib/typesseq-mutable.html), whereas
> > "in" is in section 3.6 of the library reference
> > (http://docs.python.org/lib/typesseq.html). I'm wondering how you managed to
> > find subsection 3.6.4 without finding section 3.6.
> 
> www.google.com
> 
> search "python list methods"
> 
> first search find:
> 
> 5. Data Structures
> The list methods make it very easy to use a list as a stack, where 
> the last element added .... Another useful data type built into 
> Python is the dictionary. ... http://docs.python.org/tut/node7.html
> 
> "The list data type has some more methods. Here are all of the 
> methods of list objects:"

Fair enough, but that's a tutorial. It would be foolish to demand that a
tutorial be a complete reference for everything that can be done with a list.
The page lists all methods of list objects, but there are more things one can
do with lists that don't look like method calls. For example, it doesn't say
that you can compare lists. It doesn't say that you can read and write
elements in the lists. Would you automatically assume that those things aren't
possible? I hope not. (Of course, those operations are handled by the magical
methods __eq__, __setitem__, __getitem__ etc, but I think one can forgive the
tutorial for not mentioning those in the interest of not confusing beginners.)

By your logic, no web page would be allowed to say anything about lists unless
it says *everything* about lists, and that wouldn't be very useful.

--
Carsten Haese
http://informixdb.sourceforge.net



From arkanes at gmail.com  Wed Aug  8 09:50:00 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 8 Aug 2007 08:50:00 -0500
Subject: This bit of code hangs Python Indefinitely
In-Reply-To: <f9ch45$ku$1@solaris.cc.vt.edu>
References: <f9ch45$ku$1@solaris.cc.vt.edu>
Message-ID: <4866bea60708080650w59e30402sc934336ed95b098@mail.gmail.com>

On 8/8/07, brad <byte8bits at gmail.com> wrote:
> url_queue = Queue.Queue(256)
> for subnet in subnets:
>      url_queue.put(subnet)
>
> The problem is that I have 512 things to add to the queue, but my limit
> is half that... whoops. Shouldn't the interpreter tell me that I'm an
> idiot for trying to do this instead of just hanging? A message such as
> this would be more appropriate:
>
> "Hey fool, you told me to only accept 256 things and you're trying to
> give me 512... what's up with that?"

You should have read the Queue documentation first. Queues, by design,
are producer/consumer streams and the producer is designed to block if
the queue is full. You can use the put_nowait method to have it raise
an exception instead of blocking.


From gdonald at gmail.com  Wed Aug  1 20:46:49 2007
From: gdonald at gmail.com (Greg Donald)
Date: Wed, 1 Aug 2007 19:46:49 -0500
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <20070801212840.GA25065@spookie1.spookiegate>
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
Message-ID: <15e66e4e0708011746v1bd74935t9b617f72af1bebe8@mail.gmail.com>

On 8/1/07, John K Masters <johnmasters at oxtedonline.net> wrote:
> If their support for paid customers is anything like their support for
> prospective customers then I would leave well alone.

I had no problems with their support whatsoever, really good in my
opinion.  They were very responsive and addressed all my questions
over about a 3 or 4 day email conversation.


-- 
Greg Donald
http://destiney.com/


From bj_666 at gmx.net  Wed Aug  8 06:45:15 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 Aug 2007 10:45:15 GMT
Subject: Seek the one billionth line in a file containing 3 billion lines.
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
	<46b977e9$0$27390$ba4acef3@news.orange.fr>
Message-ID: <5htl5qF3md0abU1@mid.uni-berlin.de>

On Wed, 08 Aug 2007 09:54:26 +0200, M?ta-MCI \(MVP\) wrote:

> Create a "index" (a file with 3,453,299,000 tuples : 
> line_number + start_byte) ; this file has fix-length lines.
> slow, OK, but once.

Why storing the line number?  The first start offset is for the first
line, the second start offset for the second line and so on.

Ciao,
	Marc 'BlackJack' Rintsch


From Shawn at Milochik.com  Mon Aug 20 13:16:46 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Mon, 20 Aug 2007 13:16:46 -0400
Subject: I Need help from all the group participants
In-Reply-To: <fachs3$dcr$1@localhost.localdomain>
References: <fac7nj$ci9$1@localhost.localdomain>
	<1187629313.357121.196370@q4g2000prc.googlegroups.com>
	<fachs3$dcr$1@localhost.localdomain>
Message-ID: <2dc0c81b0708201016h79b0ca5bp4a7e12fc2dee3ba9@mail.gmail.com>

On 8/20/07, Boris Ozegovic <ninja.krmenadl at nes.com> wrote:
> mensanator at aol.com wrote:
>
> > The only sentence that comes to mind is:
> >
> > "I hope I never find myself in a hospital that uses your system."
>
> You are not funny. The system isn't for hospitals, it is for university
> purposes.
>
> --
> Ne dajte da nas la?ljivac Bandi? truje:
> http://cnn.blog.hr/arhiva-2007-06.html#1622776372
> --
> http://mail.python.org/mailman/listinfo/python-list
>


I disagree. He is funny. Sorry you can't appreciate the humor -- it
must be the language barrier.

Lighten up and enjoy this life -- it's the only one we have.

From steve at holdenweb.com  Sun Aug 12 12:59:59 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Aug 2007 12:59:59 -0400
Subject: Puzzled by "is"
In-Reply-To: <20070812163657.2F8F41E400B@bag.python.org>
References: <20070809194105.39BD11E400A@bag.python.org>	<f9frbl$dps$1@sea.gmane.org>	<mailman.1814.1186692638.22759.python-list@python.org>	<87zm1042f0.fsf@benfinney.id.au>	<mailman.1839.1186768658.22759.python-list@python.org>	<87ir7l5bv4.fsf@benfinney.id.au>	<d71c7ed60708120626y6d9a9edcnf007a5273de125cc@mail.gmail.com>	<f9n8lb$cg9$1@sea.gmane.org>
	<20070812163657.2F8F41E400B@bag.python.org>
Message-ID: <f9neac$8aq$1@sea.gmane.org>

Dick Moores wrote:
> At 08:23 AM 8/12/2007, Steve Holden wrote:
>> Dick Moores wrote:
>>> So would a programmer EVER use "is" in a script?
>> Sure. For example, the canonical test for None uses
>>
>>      x is None
>>
>> because there is only ever one instance of type Nonetype, so it's the
>> fastest test. Generally speaking you use "is" to test for identity (do
>> these two expressions reference the same object) rather than equality
>> (do these two expressions evaluate to equivalent objects).
> 
> Off the top of your head, could you or others give me as many 
> examples as you can think of?
> 
Occasionally it's necessary to test for a specific type (though in 
Python this is usually bad practice). Since types are also singletons 
the best way to do this is (e.g.):

     type(x) is type([]) # test specifically for a list

If you want to know whether you have been told to write to standard 
output, one possible test is

     if f is not sys.stdout

Similarly, of course, you can test for the other standard IO channels.

The imputil module contains the test

     if importer is not self

to determine whether a reload() should be performed in the context of 
the current package.

When you need to establish a specific sentinel value that can never be 
provided by an outside caller it's normal to create an instance of 
object (the simplest possible thing you can create in a Python program) 
and test for that instance, as in

     sentinel = object()
         ...
     if value is sentinel:

You can test whether a class is new-style as opposed to old-style, which 
can help to unify old-style and new-style objects:

class MetaProperty(type):
     def __new__(cls, name, bases, dct):
         if bases[0] is object: # allow us to create class Property
             return type.__new__(cls, name, bases, dct)
         return property(dct.get('get'), dct.get('set'),
                 dct.get('delete'), dct.get('__doc__'))

     def __init__(cls, name, bases, dct):
         if bases[0] is object:
             return type.__init__(cls, name, bases, dct)


That gets you started ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From gdonald at gmail.com  Mon Aug 27 16:29:30 2007
From: gdonald at gmail.com (Greg Donald)
Date: Mon, 27 Aug 2007 15:29:30 -0500
Subject: some problems with mod_python
In-Reply-To: <1188245587.129794.258250@z24g2000prh.googlegroups.com>
References: <1188245587.129794.258250@z24g2000prh.googlegroups.com>
Message-ID: <15e66e4e0708271329l1fd9e4a0p905b4380178b70af@mail.gmail.com>

On 8/27/07, Johan <valpis at gmail.com> wrote:
> This I added to httpd.conf
> <Directory /opt/site/htdocs/test>
>         AllowOverride All
>         AddHandler mod_python .py
>         PythonHandler mptest
>         PythonDebug On
> </Directory>

This is the syntax I have working locally:

# mod_python
<Directory /opt/local/apache2/htdocs/modpython>
  AddHandler python-program .py
  PythonHandler test
  PythonDebug On
</Directory>

In particular my AddHandler directive is different from yours.


-- 
Greg Donald
http://destiney.com/


From python at jayloden.com  Tue Aug 14 20:08:01 2007
From: python at jayloden.com (Jay Loden)
Date: Tue, 14 Aug 2007 20:08:01 -0400
Subject: Python script for mobile platforms -- suggested?
In-Reply-To: <496954360708140842s2e5b7c6ctb7a40aa4099719db@mail.gmail.com>
References: <496954360708121958m170b6cd2j8419802dcdd35482@mail.gmail.com>	
	<496954360708131727o5276d5a5w57baff6cbea4c34c@mail.gmail.com>	
	<46C12274.2070705@jayloden.com>
	<496954360708140842s2e5b7c6ctb7a40aa4099719db@mail.gmail.com>
Message-ID: <46C243E1.5020004@jayloden.com>

Robert Dailey wrote:
> Hi Jay,
> 
> I apologize for not having been detailed enough. Right now I'm using a
> C++ library known as TinyXML to parse my XML files. When a menu is to be
> displayed, the XML is parsed and the appropriate images, text, etc that
> will display on the menu is loaded based on the data in that XML. Note
> that the XML parsing happens before the menu is drawn and only happens
> once per menu as to avoid performance overhead during the menu drawing.

TinyXML is pretty fast, and I'd wager to say that even without knowing what the Python code would be that replaces the XML, my guess is you'll take a performance (mem/cpu or both) hit, if for no other reason than introducing the Python interpreter overhead.

> For example, to create a menu that has an image in the center of the
> screen, the XML would be this:
> 
> <Page>
>     <Frame type="Root">
>         <Frame type="Image" value="MyImage.png">
>             <Origin point="CENTER"/>
>             <Justification point="CENTER"/>
>         </Frame>
>     </Frame>
> </Page>
> 
> The "Origin" and "Justification" elements act sort of like function
> calls, and the "Frame" element defines an "Object" kind of. Each Frame
> is a visual element in the Menu.
> 
> I'm not sure if you'll agree or not, but even in this simple example
> it's very hard to read just given the nature of the XML syntax.
> Secondly, I'm not using XML as it was intended to be used. I'm using it
> as a script instead of a representation of data. Most of the real menus
> are 600+ lines of XML much like above, however it is not nearly as
> simplistic. I will paste a real example of a menu below this email for
> those curious to look at it.

XML is first and foremost a machine-parseable language, and a human-readable one second ;) I don't think this is particularly hard to read, but then I work with XML configuration files on a daily basis at work, so I may just be a terrible person to ask...

I'm not sure I agree that you're not using XML as it was intended; you're mixing data and presentation, but it's still a document containing data. That's what XHTML is, and what the XML document definitions like OOXML are all about. Anyway, that's neither here nor there. My question would be a much simpler "why is this XML?". 

XML makes sense when you need a structured document, and sometimes that makes sense for configuration options or defining a structure, but it's not clear why you'd need it here. Is this something you're intending to make editable by the end user? If you're willing to replace it with Python scripts instead of XML documents, it sounds like maybe you're not worried about letting users edit the menus. If so, why not code the menus direct into the main C++ code? This would be faster, unless you need to frequently edit these menus.

> I haven't decided on what the Python version of the example above would
> look like, that would probably happen sometime after I decided to go
> with Python for a menu scripting replacement (If I do, that is). I might
> mix XML and Python much like World of Warcraft mixes XML with LUA
> script. Again, this all depends on design. The important points I wanted
> to get across is that the Python script wont' be executed past the
> construction of a menu. The Python/XML script would be simply there to
> allow the game to create the menu and other important things.

I think the best thing to do would be to take a step back and ask what it is that you're trying to do as the end result. What are your requirements; can you expect that Python will be installed already? Is the choice between parsing XML once with C++ or having to ship a Python interpreter with associated overhead? Once you have a set of requirements and determine what's most important to you it should make it easier to pick a solution. For instance, on a mobile device, you might simply not have the spare cycles that embedding a python interpreter would require versus a lightweight lib like TinyXML. Similarly, you'd have to ask yourself if the data is always static, or if you have a need for dynamic content (i.e. embedded scripting) within the menu definition.

-Jay


From david at nospam.spam  Tue Aug 21 03:58:40 2007
From: david at nospam.spam (david)
Date: Tue, 21 Aug 2007 17:58:40 +1000
Subject: wxPython before MainLoop
In-Reply-To: <ADBwi.1237$%Y7.624@nlpi069.nbdc.sbc.com>
References: <13bl9a75laqcm70@corp.supernews.com>	<6a6dnfbbFJNzcCbbnZ2dnUVZ_oudnZ2d@comcast.com>
	<mailman.1843.1186775191.22759.python-list@python.org>
	<ADBwi.1237$%Y7.624@nlpi069.nbdc.sbc.com>
Message-ID: <13cl6pgi23gp7a3@corp.supernews.com>

 > Looking at the Chandler code suggests a solution
 > ... he may need to call Update to finish painting
 > the display.


Yes, and thank you to Chandler for pointing that out.

Without the splash screen there was no need to call
Yield or use a generator.

(david)

samwyse wrote:
> Chris Mellon wrote:
>> On 8/9/07, Heikki Toivonen <heikki at osafoundation.org> wrote:
>>
>>> [david] wrote:
>>>
>>>> I'd like to refresh the display before I start the main loop.
> 
> If your window isn't able to interact with the user, then I'd consider 
> it a splash screen, no matter if it does look exactly like your main 
> application interface.
> 
>>> We have this kind of situation in Chandler, where we display and update
>>> the splash screen before we enter MainLoop.
>>>
> [...]
>>> 3. The splash screen refresh is basically: draw new stuff,
>>> self.Layout(), self.Update(), wx.Yield()
>>> http://lxr.osafoundation.org/source/chandler/application/Application.py#1421 
>>>
> 
> Looking at the Chandler code suggests a solution to [david]'s original 
> problem.  It is possible that, on Windows only, he may need to call 
> Update to finish painting the display.
> 
> 1432         self.Layout()
> 1433         if wx.Platform == '__WXMSW__':
> 1434             self.Update()
> 1435         wx.GetApp().Yield(True)
> 
>> wxYield spins the event loop in place. This can have some serious
>> consequences if you aren't very careful with your usage, like
>> recursively entering event handlers. I generally consider it an
>> experts only interface, and avoid it.
> 
> I'll confess to being one of those old-school programmers who, back in 
> the day, wrote his code around big select loops instead of using 
> threads, but I'm intriged by the "experts only" designation.  Can 
> someone explain further?  Thanks!


From oliver at obeattie.com  Sat Aug  4 18:52:06 2007
From: oliver at obeattie.com (oliver at obeattie.com)
Date: Sat, 04 Aug 2007 15:52:06 -0700
Subject: Encoding DeprecationWarning
In-Reply-To: <1186267419.999613.209480@q75g2000hsh.googlegroups.com>
References: <1186254427.792114.173170@q75g2000hsh.googlegroups.com>
	<mailman.1623.1186255457.22759.python-list@python.org>
	<1186267419.999613.209480@q75g2000hsh.googlegroups.com>
Message-ID: <1186267926.233392.238460@w3g2000hsg.googlegroups.com>

On Aug 4, 11:43 pm, "oli... at obeattie.com" <oli... at obeattie.com> wrote:
> >>> from wt.lib.misc_lists import all_countries
>
> __console__:1: DeprecationWarning: Non-ASCII character '\xc3' in file /
> Django/wt/../wt/lib/misc_lists.py on line 141, but no encoding
> declared; seehttp://www.python.org/peps/pep-0263.htmlfor details

OK, well; no matter. Perhaps I should try actually reading the article
it recommended and add:

# -*- coding: utf-8 -*-

To the file! What a doofus!

Thanks,
Oliver



From ziade.tarek at gmail.com  Sat Aug 11 10:06:12 2007
From: ziade.tarek at gmail.com (Tarek)
Date: Sat, 11 Aug 2007 14:06:12 -0000
Subject: A new french book on Python
Message-ID: <1186841172.271039.168200@22g2000hsm.googlegroups.com>

Hello,

A new french book is coming out on the 16th of august. It's focused on
Python good practices, agility, and all the things that makes a Python
developer loves the language.

If you are interested, the web page is here : http://programmation-python.org/guide

Regards

Tarek



From willmaier at ml1.net  Tue Aug  7 18:02:09 2007
From: willmaier at ml1.net (Will Maier)
Date: Tue, 7 Aug 2007 17:02:09 -0500
Subject: passing vars to py scipts in cron jobs
In-Reply-To: <f9ap96$60d$1@solaris.cc.vt.edu>
References: <f9ap96$60d$1@solaris.cc.vt.edu>
Message-ID: <20070807220209.GX22017@lass.lfod.us>

On Tue, Aug 07, 2007 at 05:45:46PM -0400, brad wrote:
> What's the proper way to call a py script and pass in variables
> while doing cron jobs? I can run the scripts fine from idle,
> python, etc using raw_input() to prompt users. The scripts have
> classes with methods that need arguments. 

This is commonly done with either sys.argv (a list of arguments
passed when invoking the script) or os.environ (a dictionary of
environment variables and values). Use either to instantiate your
classes or run functions.

-- 

[Will Maier]-----------------[willmaier at ml1.net|http://www.lfod.us/]


From greg at cosc.canterbury.ac.nz  Fri Aug 10 04:58:40 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Fri, 10 Aug 2007 20:58:40 +1200
Subject: pep 3116 behaviour on non-blocking reads
In-Reply-To: <slrnfblme6.cfj.apardon@rcpc42.vub.ac.be>
References: <slrnfblme6.cfj.apardon@rcpc42.vub.ac.be>
Message-ID: <5i2nt7F3ls70cU1@mid.individual.net>

Antoon Pardon wrote:
> I would like the developers to reconsider and return 0 bytes when no
> bytes are available and let None indicate end of file.

That would be a major departure from the way IO has
always been handled before in Python, which follows
the Unix model.

Also, only code that deals with non-blocking streams
will ever get None, and such code is relatively rare,
so most code won't have to worry about the None case.

Even when dealing with a non-blocking stream, usually
there will be some other way (such as select) used to
determine when there is something to be read from a
stream, and it won't be read otherwise. In that case,
the code *still* won't ever see a None.

So I think the PEP has it right.

--
Greg


From steve at holdenweb.com  Tue Aug 21 12:57:32 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Aug 2007 12:57:32 -0400
Subject: Retrieving a variable's name.
In-Reply-To: <1187658202.236626.93600@50g2000hsm.googlegroups.com>
References: <1187658202.236626.93600@50g2000hsm.googlegroups.com>
Message-ID: <faf5hi$pgb$2@sea.gmane.org>

rodrigo wrote:
> How would I go about retrieving a variable's name (not its value)? I
> want to write a function that, given a list of variables, returns  a
> string with each variable's name and its value, like:
> 
> a: 100
> b: 200
> 
> I get the feeling this is trivial, but I have been unable to find an
> answer on my own.
> 
So what would you want

     yourfunction(32)

to return? None?

Names in Python are references to values, and the same value can be 
reference by zero to many different names, so your request is close to 
nonsensical.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From toby at tobiah.org  Wed Aug 22 14:19:43 2007
From: toby at tobiah.org (Tobiah)
Date: Wed, 22 Aug 2007 11:19:43 -0700
Subject: How do I express a backslash in a string?
Message-ID: <46cc723c$0$16263$88260bb3@free.teranews.com>

>>> "'"
"'"
>>> "\'"
"'"
>>> "\\'"
"\\'"
>>> "\\\'"
"\\'"
>>>   

This is quite different than any other language
that I am used to.  Normally, a double backslash
takes away the special meaning of the last backslash,
and so you are left with a single backslash.

How do I express the single backslash?

Thanks,

Tobiah 

-- 
Posted via a free Usenet account from http://www.teranews.com



From steve at holdenweb.com  Fri Aug 10 10:48:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Aug 2007 10:48:30 -0400
Subject: wxPython before MainLoop
In-Reply-To: <13bnh5bs4b9h427@corp.supernews.com>
References: <13bl9a75laqcm70@corp.supernews.com>
	<13bnh5bs4b9h427@corp.supernews.com>
Message-ID: <f9htrq$7kl$1@sea.gmane.org>

[david] wrote:
> [...] I don't think  wxPython is really ready for Windows.
> 
I don't think you are really ready to for GUIs ;-)

Fortunately, it doesn't matter what *I* think.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From davidsamith at gmail.com  Fri Aug 31 02:05:31 2007
From: davidsamith at gmail.com (davidsamith at gmail.com)
Date: Fri, 31 Aug 2007 06:05:31 -0000
Subject: Coding Standards
Message-ID: <1188540331.961231.36850@r23g2000prd.googlegroups.com>

'Good code' is code that works, is bug free, and is readable and
maintainable. Standards need to be followed for coding. Read more...

http://brsx.co.uk/SWtesting/FAQs/FAQs012.asp



From jstroud at mbi.ucla.edu  Fri Aug  3 21:45:59 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 03 Aug 2007 18:45:59 -0700
Subject: How to pass a reference to the current module
In-Reply-To: <pan.2007.08.04.01.46.50.985228@REMOVE.THIS.cybersource.com.au>
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<pan.2007.08.04.01.46.50.985228@REMOVE.THIS.cybersource.com.au>
Message-ID: <f90lon$av5$1@daisy.noc.ucla.edu>

Steven D'Aprano wrote:
> On Fri, 03 Aug 2007 17:22:40 -0700, James Stroud wrote:
> 
> 
>>Basically, what I am trying to acomplish is to be able to do this in any 
>>arbitrary module or __main__:
>>
>>
>>funcname = determined_externally()
>>ModuleUser.do_something_with(AModule, funcname)
>>
>>
>>Ideally, it would be nice to leave out AModule if the functions were 
>>designed in the same namespace in which do_something_with is called.
> 
> 
> I second Carsten Haese's suggestion that instead of passing function
> names, you pass function objects, in which case you don't need the module.
> But perhaps you need some way of finding the function, given its name.
> 
> def get_function_from_name(name, module=None):
>     if module is None:
>         # use the current namespace
>         namespace = locals() # or globals() if you prefer
>     else:
>         namespace = module.__dict__
>     return namespace[name]
> 
> 

This assumes that get_function_from_name is defined in the same module 
as the function named by name. However, I want this:


      Module            Behavior
   ==============  ====================================================
    UserDefined1   Imports FunctionUser
    ThirdParty     Contains User Functions (May be ==UserDefined1)
    FunctionUser   do_something_with() and/or get_function_from_name()

So the name-to-function mapping is done in FunctionUser but the function 
is actually defined in UserDefined1 (or ThirdParty if ThirdParty is 
different than UserDefined1).

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From ptmcg at austin.rr.com  Thu Aug 30 03:22:27 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Thu, 30 Aug 2007 00:22:27 -0700
Subject: Python molecular viewer
In-Reply-To: <mailman.103.1188394354.28954.python-list@python.org>
References: <mailman.103.1188394354.28954.python-list@python.org>
Message-ID: <1188458547.056668.177140@d55g2000hsg.googlegroups.com>

On Aug 29, 8:31 am, Andy Cheesman <Andy.chees... at bristol.ac.uk> wrote:
> Dear People,
>
> I was wondering if people could recommend a simple molecular viewing
> package written in python. I'm working in Theoretical chemistry and I'm
> not after an all-singing dancing molecular rendering package(pymol does
> that rather well) but a program which reads XYZ files and displays
> simple structures which can be rotated in 3D
>
> Thanks
>
> Andy

slut is an OpenGL wrapper that I found to be very intuitive to use,
and comes with some simple "moving ball" animations, but the
animations also can be panned, zoomed, and rotated.  In your case, you
wouldn't need to do the animation, just plot the balls in 3D and then
pan and zoom to your heart's content.

Here is a simple program that plots a series of points on a sphere:

from slut import *

# points on a sphere
data = [
(1.0, 0.0, 0.0),
 (0.945, 0.0, -0.325),
 (0.789, 0.0, -0.613),
 (0.547, 0.0, -0.836),
 (0.246, 0.0, -0.968),
 (-0.083, 0.0, -0.997),
 (-0.402, 0.0, -0.916),
 (-0.677, 0.0, -0.735),
...
 (-0.078, 0.027, 0.997),
 (0.232, -0.080, 0.968),
 (0.517, -0.177, 0.836),
 (0.746, -0.256, 0.613),
 (0.895, -0.307, 0.325),
 (0.945, -0.325, 0.0) ]

from slut import *

class SphereViewer(World):
    def onSetup(self):
        self.width = 400
        self.height = 400
        self.name = "Points on a Sphere"

    def onDraw(self):
        # draw translucent sphere
        glColor4f(0.7, 0.7, 0.7, 0.5)
        sphere(0, 0, 0, 1.0)
        glColor4f(0.3, 0.3, 0.4, 1.0)

        # plot points on surface
        glPointSize(4)
        for d in data:
            point(*d)

        # connect points with path
        glLineWidth(1.5)
        lastd = data[-1]
        for d in data:
            line( *(lastd + d) )
            lastd = d

viewer = SphereViewer()
viewer.run()

And here is a short Wink video showing me working with a simplified
version of this sphere: http://www.geocities.com/ptmcg/python/sphere1.htm.

If you have your molecules' 3D coordinates, you should be able to just
plot them, and then use slut to view the molecule.

-- Paul



From mail at microcorp.co.za  Fri Aug 24 10:44:50 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 24 Aug 2007 16:44:50 +0200
Subject: Socket recv(1) seems to block instead of returning end of file.
References: <mailman.164.1187862959.32294.python-list@python.org><pan.2007.08.23.16.48.52.958428@datallegro.com>
	<13cric35jcjp336@corp.supernews.com>
Message-ID: <015101c7e65d$843596c0$03000080@hendrik>

"Grant Edwards" <gra...si.com> wrote:


> On 2007-08-23, Dan Stromberg - Datallegro <dstr....gro.com> wrote:
> 
> > Are you using sock.settimeout()?
> 
> Hey, somebody snuck timeouts into the socket module when I wasn't
> looking...
> 
> > I agree with Grant though - posting a minimal snippet of code that
> > replicates the problem would help us help you.  In fact, it might help you
> > help yourself :)
> 
> Yup, in my experience attempting to produce a minimally failing
> example will usually reveal what's wrong.
> 

I am now extremely frustrated - I have spent most of the day mucking
around with this, and now I have managed to lose the version that
was giving me grief, and I can't remember what I have done.

At the moment everything works, and detects remote comm loss, 
no matter what I do.

So I must have done something stupid, and destroyed the evidence.

Some mothers have children.
Others have bad luck.

My apologies for chasing you up like that, and thanks to all who responded.

- Hendrik




From tim.couper at scivisum.co.uk  Tue Aug 28 14:14:20 2007
From: tim.couper at scivisum.co.uk (Tim Couper)
Date: Tue, 28 Aug 2007 19:14:20 +0100
Subject: Jython 2.2 on Ubuntu
In-Reply-To: <-YOdnW_k3p6Fy0nb4p2dnAA@bt.com>
References: <-YOdnW_k3p6Fy0nb4p2dnAA@bt.com>
Message-ID: <46D465FC.9050300@scivisum.co.uk>

you need to ensure that the correct jython executable is in a directory 
which is on your on your path.

I've just successfully test-subscribed to 
https://lists.sourceforge.net/lists/listinfo/jython-users. Maybe you 
could try again.

Tim

Dr Tim Couper
CTO, SciVisum Ltd

www.scivisum.com



Neil Wallace wrote:
> Hi all,
>
> I am a novice Python/Jython programmer, and Ubuntu user.
>
> Ubuntu still only supports only version 2.1 of Jython. I have used the 
> GUI installer of Jython 2.2, and installed it to the default 
> /root/jython2.2 directory. The install went without issues.
>
> However, typing ............jython --version
> in a teminal still gives me   ........ Jython 2.1 on java (JIT: null)
>
> What else do I need to do?
>
> regards
> Neil.
>
> p.s. I posted this to the jython group hosted by sourceforge, but it 
> bounced. :-(
>   


From joshua at eeinternet.com  Wed Aug  1 19:28:44 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 01 Aug 2007 15:28:44 -0800
Subject: Bug in Time module, or in my understanding?
References: <f8qvua$pa5$1@sea.gmane.org> <46B10DEA.4050005@jayloden.com>
Message-ID: <f8r4vc$748$1@sea.gmane.org>

On Wednesday 01 August 2007 14:49, Jay Loden wrote:
> Hope some of this helps

It did, thanks!

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From owntheweb at gmail.com  Wed Aug 29 19:04:15 2007
From: owntheweb at gmail.com (Ultrus)
Date: Wed, 29 Aug 2007 23:04:15 -0000
Subject: replacing xml elements with other elements using lxml
In-Reply-To: <46D5A272.2000509@web.de>
References: <1188399381.188639.289480@57g2000hsv.googlegroups.com>
	<46D5A272.2000509@web.de>
Message-ID: <1188428655.300330.213430@r29g2000hsg.googlegroups.com>

Stefan,
I'm honored by your response.

You are correct about the bad xml. I attempted to shorten the xml for
this example as there are other tags unrelated to this issue in the
mix. Based on your feedback, I was able to make following fully
functional code using some different techniques:

from lxml import etree
from StringIO import StringIO
import random

sourceXml = "\
<theroot>\
 <contents>Stefan's fortune cookie:</contents>\
 <random>\
  <item>\
   <random>\
    <item>\
     <contents>You will always know love.</contents>\
    </item>\
    <item>\
     <contents>You will spend it all in one place.</contents>\
    </item>\
   </random>\
  </item>\
  <item>\
   <contents>Your life comes with a lifetime warrenty.</contents>\
  </item>\
 </random>\
 <contents>The end.</contents>\
</theroot>"

parser = etree.XMLParser(ns_clean=True, recover=True,
remove_blank_text=True, remove_comments=True)
tree = etree.parse(StringIO(sourceXml), parser)
xml = tree.getroot()

def reduceRandoms(xml):
	for elem in xml:
		if elem.tag == "random":
			elem.getparent().replace(elem, random.choice(elem)[0])
			reduceRandoms(xml)

reduceRandoms(xml)
for elem in xml:
	print elem.tag, ":", elem.text




One challenge that I face now is that I can only replace a parent
element with a single element. This isn't a problem if an <item>
element only has 1 <contents> element, or just 1 <random> element
(this works above). However, if <item> elements have more than one
child element such as a <contents> element, followed by a <random>
element (like children of <theroot>), only the first element is used.

Any thoughts on how to replace+append after the replaced element, or
clear+append multiple elements to the cleared position?

Thanks again :)



From steven.bethard at gmail.com  Tue Aug 21 13:31:44 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 21 Aug 2007 11:31:44 -0600
Subject: Module level descriptors or properties
In-Reply-To: <1187700539.312552.89340@w3g2000hsg.googlegroups.com>
References: <1187700539.312552.89340@w3g2000hsg.googlegroups.com>
Message-ID: <duSdndzSEdEJvFbbnZ2dnUVZ_j2dnZ2d@comcast.com>

Floris Bruynooghe wrote:
> When in a new-style class you can easily transform attributes into
> descriptors using the property() builtin.  However there seems to be
> no way to achieve something similar on the module level, i.e. if
> there's a "version" attribute on the module, the only way to change
> that to some computation later is by using a getter from the start as
> your public API.  This seems ugly to me.
> 
> Does anyone know of a better way to handle this?

Better is of course subjective, but you can always do something like::


     class ModuleWrapper(...):
         def __init__(self, module):
             ...
         ...
         x = property(...)

     sys.modules[__name__] = ModuleWrapper(sys.modules[__name__])

STeVe


From gmcalendar at gmail.com  Thu Aug 23 10:56:28 2007
From: gmcalendar at gmail.com (gmcalendar at gmail.com)
Date: Thu, 23 Aug 2007 14:56:28 -0000
Subject: simple spider in python
In-Reply-To: <1187879398.007797.128510@i13g2000prf.googlegroups.com>
References: <1187876014.845912.236690@e9g2000prf.googlegroups.com>
	<1187879398.007797.128510@i13g2000prf.googlegroups.com>
Message-ID: <1187880988.813113.20350@l22g2000prc.googlegroups.com>

thanks everybody, soooo kind. I'll take a look at booth.
have a nice day/night (depending on your latitude!) ^_^

ciao!



From nikhilketkar at gmail.com  Fri Aug 17 12:00:43 2007
From: nikhilketkar at gmail.com (nikhilketkar)
Date: Fri, 17 Aug 2007 09:00:43 -0700
Subject: Can python threads take advantage of use dual core ?
Message-ID: <1187366443.621295.97020@e9g2000prf.googlegroups.com>

What are the implications of the Global Interpreter Lock in Python ?
Does this mean that Python threads cannot exploit a dual core
processor and the only advantage of using threads is in that
computation and IO-bound operations can continue in parallel ?

Thanks,
Nikhil



From uymqlp502 at sneakemail.com  Fri Aug 31 16:27:19 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Fri, 31 Aug 2007 13:27:19 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <mailman.234.1188588307.28954.python-list@python.org>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<1188537516.622167.115080@z24g2000prh.googlegroups.com>
	<mailman.217.1188577500.28954.python-list@python.org>
	<1188585630.539835.242460@i38g2000prf.googlegroups.com>
	<mailman.234.1188588307.28954.python-list@python.org>
Message-ID: <1188592039.612652.223700@r23g2000prd.googlegroups.com>


Steve Holden wrote:

> Well that's a healthy attitude, but I am concerned that the Python
> community should be as welcoming as possible, so I don't like the fact
> that you feel you are being treated differently from anyone else.

I certainly appreciate that. And I will try my best to refrain from
the little personal zingers (and
the big ones too).

> > All you really need to test the pre-conditions of a function
> > is a call at the top of the function to another function that checks
> > the inputs. To test the
> > post-conditions, you just need a call at the bottom of the function,
> > just before the return,
> > that checks the return values. Those functions can also check the
> > invariants. Then you
> > define a global variable to switch all the self-test functions on or
> > off at once.
> >
> It does constrain functions to return only from the bottom of their
> code, though, which not all Python functions currently do. Though
> there's nothing to stop you putting the calls before every return.

Oops! I didn't think of that. The idea of putting one before every
return certainly doesn't
appeal to me. So much for that idea.



From furkankuru at gmail.com  Mon Aug 20 06:30:42 2007
From: furkankuru at gmail.com (Furkan KURU)
Date: Mon, 20 Aug 2007 13:30:42 +0300
Subject: building exe from script
In-Reply-To: <1187602337.366419.92930@r29g2000hsg.googlegroups.com>
References: <1187602337.366419.92930@r29g2000hsg.googlegroups.com>
Message-ID: <3a4a8f930708200330v61d0d482o33f6f4a14afc14e6@mail.gmail.com>

you can embed py2exe in your program.


On 8/20/07, vedrandekovic at v-programs.com <vedrandekovic at v-programs.com> wrote:
> Hello,
>
> Is there any solution for building exe file from python script
> something like bbfreeze.When user write some script in
> my program, it must compile script into exe without opening console
> ( cmd ).I'am working on Windows XP  SP2 and Python 2.5.
>
>
>
> Regards,
> Vedran
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Furkan Kuru


From coyote_x at artcom.pl  Fri Aug 31 08:34:46 2007
From: coyote_x at artcom.pl (Adam Kubica)
Date: Fri, 31 Aug 2007 14:34:46 +0200
Subject: Pylons, SQLAlchemy, too many connections problem.
References: <pan.2007.08.31.12.03.48.18688@artcom.pl>
Message-ID: <pan.2007.08.31.12.34.43.834646@artcom.pl>

On Fri, 31 Aug 2007 14:03:48 +0200, Adam Kubica wrote:

> Hello.
> 
> I have pylons 0.96 (SVN) and current SQLAlchemy (0.3.10), and I have bug
> that
> doesn't exist earlier.
> 
> My connection code:
> <code>
> import sqlalchemy.mods.threadlocal
> from sqlalchemy import DynamicMetaData, objectstore
> 
> metadata = DynamicMetaData( case_sensitive = False )
> 
> def db_connect( dsn ):
>     engine = create_engine( dsn, echo=False, echo_pool=False,
> encoding='latin2',  convert_unicode=True )
>     metadata.connect( engine )
> </code>
> 
> command "netstat -an|grep 5432|grep ESTABLISHED|wc -l" displays one
> more connection after each refresh of page until I have exceptions
> such as:
> 
> sqlalchemy.exceptions.DBAPIError: (Connection failed)
> (OperationalError) FATAL: sorry, too many clients already
> 
> What is wrong?

Don't use DynamicMetaData(), use MetaData(), it's the problem.


From gagsl-py2 at yahoo.com.ar  Sun Aug 19 15:40:25 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 19 Aug 2007 12:40:25 -0700
Subject: Overriding Thread.join in derived class.
In-Reply-To: <1187422280.018913.184990@q3g2000prf.googlegroups.com>
References: <1187422280.018913.184990@q3g2000prf.googlegroups.com>
Message-ID: <1187552425.752125.302290@a39g2000hsc.googlegroups.com>

On 18 ago, 04:31, Graham Dumpleton <Graham.Dumple... at gmail.com> wrote:

> If one creates a thread using threading.Thread and makes it a daemon
> by calling setDaemon(), then when Python is exiting it will not
> attempt to call join() on that thread and wait for it to complete
> first. [...]
> End result is that it could result in a Python exception at some
> point, evidenced by messages starting with:
> Exception in thread Thread-1 (most likely raised during interpreter
> shutdown) [...]
>
> In order to avoid this, do people think that as an alternative to
> creating daemonised thread that it would be reasonable to create a
> derived Thread class for the particular task which overrides
> Thread.join() method to set some flag or otherwise take some action
> that the thread would notice to tell it to stop, and then call base
> class Thread.join().
>
> This way you can flag the thread to shutdown automatically when Python
> is going around calling join() on non daemonised threads.
>
> Or am I missing the obvious as far as ways of flagging threads to tell
> them to stop?
>
> Note that this is where Python is being used embedded in a C program.
> There is no Python main function where code can be put to signal
> threads to otherwise stop.

This last statement is important. You need "some" way to tell the
threads to stop working. Usually the thread's run() method is a big
loop; you need to tell it somehow to exit the loop. By example, if you
are using a Queue, put a sentinel object in it; or use an Event
object; or at least a global variable.
Overriding thread.join() as you suggest above may be a good place to
do that, if you don't have another chance.

--
Gabriel Genellina



From fabiofz at gmail.com  Mon Aug 13 06:37:58 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Mon, 13 Aug 2007 07:37:58 -0300
Subject: Eclipse/PyDev question
In-Reply-To: <1186998539.030727.279330@g4g2000hsf.googlegroups.com>
References: <1186998539.030727.279330@g4g2000hsf.googlegroups.com>
Message-ID: <cfb578b20708130337y36a0d6e0g806457fdf2e07c32@mail.gmail.com>

On 8/13/07, king kikapu <aboudouvas at panafonet.gr> wrote:
>
> Hi,
>
> i am using Eclipse (Platform Runtime binary) with PyDev and i was
> wondering if someone can help me with this:
>
> 1. I set breakpoints to a .py file and i have told Eclipse to open the
> Debug perspective when it sees that some .py file(s) of my project
> indeed contains breakpoints. So, i press F9,  Eclipse starts, Debug
> perspective opens and i can use the debugger just fine. But when the
> app terminates, how can i tell Eclipse to switch automatically to the
> PyDev perspective and not remain in the Debug one ?


There's no currently no automatic' way to do this (but you can use Ctrl+F8
to iterate your perspectives, Ctrl+F7 for your views and Ctrl+F6 for your
editors, so, it should be easy to go to wherever you want in the interface).

2. Let's say we have a project that consists of some .py files. I want
> to press F9 when the editor displays anyone of these files but make
> Eclipse to run the whole project (that has another .py as "default")
> and not the script that i am currently working on, is that possible ??


You should do F9 in you current editor and then Ctrl+F11 to re-run the last
run -- so, if you have a main file that you just ran in your project, you
can probably just keep to Ctrl+F11 -- note that this behavior changed with
Eclipse 3.3, but you can restore it: window > preferences >  run/debug >
launching > always launch the previously launched application.

Cheers,

Fabio
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From sturlamolden at yahoo.no  Wed Aug 15 12:14:20 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: Wed, 15 Aug 2007 09:14:20 -0700
Subject: ctypes windll question
In-Reply-To: <1187084704.869276.317030@r34g2000hsd.googlegroups.com>
References: <1187084704.869276.317030@r34g2000hsd.googlegroups.com>
Message-ID: <1187194460.677426.36950@r34g2000hsd.googlegroups.com>

On Aug 14, 11:45 am, Tzury <Afro.Syst... at gmail.com> wrote:

> I followed the tutorial about ctypes and I still cannot figure out how
> to call a method of a calss within the dll.

ctypes interfaces with C, not C++. C++ compilers do various forms of
name manging, create virtual tables, etc. that are compiler dependent.
You cannot call C++ from ctypes.








From stargaming at gmail.com  Wed Aug  1 12:55:53 2007
From: stargaming at gmail.com (Stargaming)
Date: 01 Aug 2007 16:55:53 GMT
Subject: Assertion in list comprehension
References: <1185982643.001546.138180@e16g2000pri.googlegroups.com>
	<mailman.1439.1185985738.22759.python-list@python.org>
Message-ID: <46b0bb19$0$14060$9b622d9e@news.freenet.de>

On Wed, 01 Aug 2007 11:28:48 -0500, Chris Mellon wrote:

> On 8/1/07, beginner <zyzhu2000 at gmail.com> wrote:
>> Hi,
>>
>> Does anyone know how to put an assertion in list comprehension? I have
>> the following list comprehension, but I want to use an assertion to
>> check the contents of rec_stdl. I ended up using another loop which
>> essentially duplicates the functions of list comprehension. It just
>> look like a waste of coding and computer time to me.
>>
>> I just wish I could put the assertions into list comprehensions.
>>
>>         x=[(rec_stdl[0].st/10000.0,
>>             rec_stdl[0].cl,
>>             rec_stdl[0].bb,
>>             rec_stdl[0].bo,
>>             rec_stdl[1].bb,
>>             rec_stdl[1].bo,
>>             rec_stdl[0].ex
>>            )
>>            for rec_stdl in rec_by_ex if len(rec_stdl)==2
>>         ]
>>
>>         #duplicated loop
>>         if __debug__:
>>             for rec_stdl in rec_by_ex:
>>                 l=len(rec_stdl)
>>                 assert(l<=2 and l>0)
>>                 if l==2:
>>                     assert(rec_stdl[0].c=="C" and rec_stdl[1].c=="P")
>>                     assert(rec_stdl[0].ex==rec_stdl[1].ex)
>>                     assert(rec_stdl[0].st==rec_stdl[1].st)
>>                     assert(rec_stdl[0].cp==rec_stdl[1].cp)
> 
> First: All your asserts are wrong. Assert is a statement, not a
> function. These specific ones will behave as expected, but it's easy to
> accidentally write ones that always pass this way.

Could you come up with an example? I can only think of accidentally 
injecting a comma, what would create a (true, in a boolean context) tuple.

And, well, if you're only using () for readabilty, this might sometimes 
look messy when calling assert with the extended syntax::

  assert(False), "error text"

Where one could expect the construction of a tuple.

> Secondly: This is a waste of code, because if __debug__ is not defined
> asserts will be skipped by the compiler. You could use the same loop
> block for both branches.

Well, the `assert` isn't there for no reason, but if you're serious about 
it, `raise` could be better.

> Thirdly: This sort of testing is precisely what unit tests and/or
> doctests are for.

Huh? What beginner is doing there seems more like input validation than 
testing. Unit or doctests are meant for testing (and in case of doctests, 
showing) whether a function works as expected.


From robert.kern at gmail.com  Fri Aug 24 15:58:01 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 24 Aug 2007 14:58:01 -0500
Subject: Co-developers wanted: document markup language
In-Reply-To: <46CEAF71.3050900@freakmail.de>
References: <87odgyyx9u.fsf@wilson.homeunix.com>	<fakrtb$2ts$1@panix3.panix.com>	<87tzqpew22.fsf@wilson.homeunix.com>	<fal3cv$bi2$1@panix3.panix.com>	<87tzqp77my.fsf@wilson.homeunix.com>	<7xy7g1if24.fsf@ruckus.brouhaha.com>	<87mywh717i.fsf@wilson.homeunix.com>
	<46CEAF71.3050900@freakmail.de>
Message-ID: <fand89$isa$1@sea.gmane.org>

Wildemar Wildenburger wrote:
> Torsten Bronger wrote:
>> Hall?chen!
>>   
> Yes, you're German. Have you ever noticed that (we) Germans are 
> virtually the only ones that feel the need to rub our nationality into 
> everyones faces? ;)

Howdy!

We Americans do the same.  ;-)

-- 
Robert Kern

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



From ajmacd at ns.sympatico.ca  Sun Aug 12 16:30:45 2007
From: ajmacd at ns.sympatico.ca (Aaron J. M.)
Date: Sun, 12 Aug 2007 13:30:45 -0700
Subject: Pausing and Unpausing Threads
In-Reply-To: <13bulsklq359q8f@corp.supernews.com>
References: <1186883176.319755.304970@d55g2000hsg.googlegroups.com>
	<13bulsklq359q8f@corp.supernews.com>
Message-ID: <1186950645.886995.56060@w3g2000hsg.googlegroups.com>

On Aug 12, 3:55 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>         By this definition, if there is no "action" supplied, a
> "DirectedControler" will result in blocking ALL others (directed or not)
> in this "server" (as it blocks the entire server thread).
>
>         Is that really the behavior you want?

For my particular application, yes.  This is exactly what I want.

>         I'd suggest using a Queue PER directed controller. Initialize
>
>         self._actions = Queue.Queue()
>
> -=-=-=-=-=-
>
>         def turn(self):
>                 while True:
>                         atn = self._actions.get()       #blocks until at least one entry
>                         if atn and atn.execute():       #should be in a try/except if
>                                                                                 # action has NO execute method
>                                 break                                   #did something, so exit while
>
> -=-=-=-=-=-
>
>         def setAction(self, action):
>                 self._actions.put(action)       #could add code to ensure
>                                                                         #an execute attribute

Thank you very much for your help. :) I'll get to work on this now.

Cheers,

Aaron J. M.



From vodela.sai at gmail.com  Thu Aug 16 15:07:59 2007
From: vodela.sai at gmail.com (Rohan)
Date: Thu, 16 Aug 2007 19:07:59 -0000
Subject: Help me!!
Message-ID: <1187291279.545324.205610@i38g2000prf.googlegroups.com>

I have the following piece of code

a = len(ab_file)
   b= 0
   while(b<a):
      c= 0
      d = len(cd_files)
      while(c<d):
         if cd_files[c] == ab_file[b]:
            files.append(ab_file[b].upper())
         else:
             files.append(ab_file[b])
         c =  c + 1

      b = b +1

   print files

I'm trying to compare the list with another list and if it is there in
both I'm changing it to upper case and adding to another list and if
its not there in both I just want to add it to the global list (ie
files).
I'm able to do the first part but when I'm doing the second part the
files which are not there in both are getting repeatedly into the
global file. Some one help me so that
If ab = [a,b,c,d]
and cd = [a,c]
my global list file should be [A,b,C,d]



From iapain at gmail.com  Fri Aug 31 12:46:44 2007
From: iapain at gmail.com (iapain)
Date: Fri, 31 Aug 2007 16:46:44 -0000
Subject: JavaScript
In-Reply-To: <1188574962.185775.274420@d55g2000hsg.googlegroups.com>
References: <1188574962.185775.274420@d55g2000hsg.googlegroups.com>
Message-ID: <1188578804.717125.121510@r23g2000prd.googlegroups.com>

>python has modules for forms and other things... and for it?

Check out httplib and urlib2, it might be useful for you.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug  1 06:04:41 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 01 Aug 2007 12:04:41 +0200
Subject: standalone process to interact with the web
In-Reply-To: <1185909098.952860.217190@j4g2000prf.googlegroups.com>
References: <1185899130.331170.151980@e16g2000pri.googlegroups.com>
	<mailman.1375.1185900147.22759.python-list@python.org>
	<1185904623.754078.198910@e9g2000prf.googlegroups.com>
	<mailman.1379.1185905472.22759.python-list@python.org>
	<1185909098.952860.217190@j4g2000prf.googlegroups.com>
Message-ID: <46b05aac$0$31743$426a74cc@news.free.fr>

beginner a ?crit :
(snip)
> Yes exactly. I just don't want to reinvent the wheel as I imagine
> there are already tons of libraries and frameworks that support RPC or
> the like functions.

Why go thru the pain of RPC, SOAP or such bloated horrors ? Why not just 
use plain old HTTP with a RESTful API ? Then you just need to make your 
app wsgi compliant.


From dwahler at gmail.com  Sat Aug 11 17:36:58 2007
From: dwahler at gmail.com (David Wahler)
Date: Sat, 11 Aug 2007 16:36:58 -0500
Subject: Something in the function tutorial confused me.
In-Reply-To: <qdpvi.2225$ZW4.461@trndny04>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<mailman.1726.1186537161.22759.python-list@python.org>
	<5hsoi3F3mlni2U1@mid.individual.net> <f9ceb9$jsm$1@sea.gmane.org>
	<1186581124.3383.55.camel@dot.uniqsys.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
	<slrnfbk19k.20o.horpner@FIAD06.norwich.edu>
	<1i2nhxn.tme05x17r39odN%aleax@mac.com>
	<m3hvi.37606$G23.6240@newsreading01.news.tds.net>
	<qdpvi.2225$ZW4.461@trndny04>
Message-ID: <dad14b100708111436q2e236f03hea42556b8137ded0@mail.gmail.com>

On 8/11/07, Gregory D. Weber <spottedMetal at gmail.com> wrote:
> I too thought += was an assignment.  And it bit me very painfully a few weeks ago.
>
> If it's an assignment, then wouldn't "x += y" mean the same thing as "x = x + y"?
>
> If so, why does an assignment to variable a, below, have the *side effect* of changing variable b ... ?
>
> >>> a = [1, 2, 3]
> >>> b = a
> >>> b
> [1, 2, 3]
> >>> a += [4]
> >>> a
> [1, 2, 3, 4]
> >>> b
> [1, 2, 3, 4]
>
> ... but using the "x = x + y" style, the assignment to variable c, below, does *not* have a side effect on variable d (as indeed it should not!)?
>
> >>> c = [1, 2, 3]
> >>> d = c
> >>> d
> [1, 2, 3]
> >>> c = c + [4]
> >>> c
> [1, 2, 3, 4]
> >>> d
> [1, 2, 3]

>>> help(list.__iadd__)
Help on wrapper_descriptor:

__iadd__(...)
    x.__iadd__(y) <==> x+=y

For mutable (built-in) objects such as lists, __iadd__ modifies the
list and then returns the list object; for immutable objects, __iadd__
is equivalent to __add__ and just returns the new value. However, in
both cases, the result is then rebound to x. This can lead to some
behaviors you might not normally expect:

>>> t = ([],)
>>> t[0] += [1]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'tuple' object does not support item assignment
>>> t
([1],)

-- David


From zxo102 at gmail.com  Thu Aug  2 23:46:44 2007
From: zxo102 at gmail.com (zxo102)
Date: Thu, 02 Aug 2007 20:46:44 -0700
Subject: Help:  GIS
Message-ID: <1186112804.718290.207580@z24g2000prh.googlegroups.com>

Hi,
    I am new in GIS area and need your suggestions for where I can
start from.  I have a python based web application with a database.
Now I would like to add a GIS map into my application. When a user
clicks a certain area in the GIS map, it can grab the data from the
database via my python based application. Do I have to use MapServer
or Grass or some other  backends for this purpose?
   Thanks  a lot.

Ouyang



From jjl at pobox.com  Sun Aug  5 16:46:14 2007
From: jjl at pobox.com (John J. Lee)
Date: Sun, 05 Aug 2007 20:46:14 GMT
Subject: Misleading wikipedia article on Python 3?
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
Message-ID: <877io9soa1.fsf@pobox.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:

>> I'm surprised to read this:
>> 
>> http://en.wikipedia.org/wiki/Python_3
>> 
>> """Note that while there is no explicit requirement that code be able
>> to run unmodified in both versions, in practice it is quite likely for
>> most code. As of January 2007, it looks like most reasonable code
>> should run quite well under either branch."""
>
> It's difficult to predict the future, but I think this statement is
> a fair description.
>
>> 
>> I haven't been following Python 3 development recently.  Have things
>> really changed that much?  Last time I looked, e.g. dict.items() no
>> longer returned a list.
>
> Correct.
>
>> Seems unlikely that most code will run on 2
>> and 3, in that case,
>
> Why that? Most reasonable code doesn't care what dict.items returns,
> as it reads like
>
> for k,v in dict.items():
>   do_something_with(k,v)

We could discuss that.  However, my example wasn't really intended to
relate strictly to that technical feature.  Rather, to the intent of
the Python 3 developers, as suggested by things like that change, and
by what they've said over the last year or so (I think I've seen that
specific change used several times by people explaining that 2.6 / 3.0
compatibility will be impractical, which is why I chose it).


>> and IIUC Guido has said all along that not much
>> code will run on both.
>
> I think you misunderstood. It's not a design goal that code works
> without modifications, yet most reasonable code will even without
> that being an explicit goal.

I think the design goals have been fairly clear.  What hasn't been
clear (to me, at least) is the practical question of the feasibility
of code working unchanged on both 2.6 and 3.0.

http://www.python.org/dev/peps/pep-3000/

"""There is no requirement that Python 2.6 code will run unmodified on
Python 3.0. Not even a subset. (Of course there will be a tiny subset,
but it will be missing major functionality.)"""


Though certainly neither quote is precise enough to pin it down
formally, certainly the tone of the first quote (from the Wikipedia
article) to my ear makes it sound like (at minimum!) it will be
practical for most projects, if they do the work to support both 3.0
and 2.6, to run simultaneously on 2.6 and 3.0 without use of a
translation tool.  The second quote makes it sound like that will be
highly impractical.  That picture is reinforced by what follows (in
PEP 3000):

"""
The recommended development model for a project that needs to support
Python 2.6 and 3.0 simultaneously is as follows:

   0. You should have excellent unit tests with close to full
      coverage.

   1. Port your project to Python 2.6.

   2. Turn on the Py3k warnings mode.

   3. Test and edit until no warnings remain.

   4. Use the 2to3 tool to convert this source code to 3.0 syntax. Do
      not manually edit the output!

   5. Test the converted source code under 3.0.

   6. If problems are found, make corrections to the 2.6 version of
      the source code and go back to step 3.

   7. When it's time to release, release separate 2.6 and 3.0 tarballs
      (or whatever archive form you use for releases).

It is recommended not to edit the 3.0 source code until you are ready
to reduce 2.6 support to pure maintenance (i.e. the moment when you
would normally move the 2.6 code to a maintenance branch anyway).
"""


So which is it?  That is, will it be practical for most projects to
support 2.6 and 3.0 simultaneously, from the same codebase, without
relying on translation tools?  I'm assuming the practicalities of this
*are* clear by now to the Python 3 developers -- is that right?  It
seems to me that if I don't understand what the Python 3 developers
expect the practicalities to be, most other interested people won't
either ("interested" in the opposite sense to "disinterested" rather
than to "uninterested").


John


From ah at neznamkojamijeemailadre.sa  Mon Aug 20 13:48:44 2007
From: ah at neznamkojamijeemailadre.sa (=?iso-8859-2?B?qXXmTXXmUGFQcm9saWo=?=)
Date: Mon, 20 Aug 2007 19:48:44 +0200
Subject: I Need help from all the group participants
References: <fac7nj$ci9$1@localhost.localdomain><1187629313.357121.196370@q4g2000prc.googlegroups.com><fachs3$dcr$1@localhost.localdomain>
	<mailman.0.1187630213.32294.python-list@python.org>
Message-ID: <fack3a$7kk$1@ss408.t-com.hr>


"Shawn Milochik" <Shawn at Milochik.com> wrote in message 
news:mailman.0.1187630213.32294.python-list at python.org...
> On 8/20/07, Boris Ozegovic <ninja.krmenadl at nes.com> wrote:
>> mensanator at aol.com wrote:
>>
>> > The only sentence that comes to mind is:
>> >
>> > "I hope I never find myself in a hospital that uses your system."
>>
>> You are not funny. The system isn't for hospitals, it is for university
>> purposes.
>>
>> --
>> Ne dajte da nas la?ljivac Bandi? truje:
>> http://cnn.blog.hr/arhiva-2007-06.html#1622776372
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>
>
>
> I disagree. He is funny. Sorry you can't appreciate the humor -- it
> must be the language barrier.
>

hahahahahahahahahahahahaha



From antroy at gmail.com  Sat Aug 11 18:25:28 2007
From: antroy at gmail.com (Ant)
Date: Sat, 11 Aug 2007 15:25:28 -0700
Subject: The Future of Python Threading
In-Reply-To: <1186807396.988368.201400@b79g2000hse.googlegroups.com>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<1i2njyp.1o6yslqe7ff47N%luc@honk-honk.com>
	<1186782710.600889.245930@j4g2000prf.googlegroups.com>
	<1186802188.653072.236260@x40g2000prg.googlegroups.com>
	<1186807396.988368.201400@b79g2000hse.googlegroups.com>
Message-ID: <1186871128.210582.27300@k79g2000hse.googlegroups.com>

On Aug 11, 5:43 am, Seun Osewa <seun.os... at gmail.com> wrote:
> > I think I've heard Guido say the last attempt at removing the Global
> > Interpreter Lock (GIL) resulted in a Python that was much slower...
>
> What is it about Python that makes a thread-safe CPython version much
> slower?  Why doesn'ttrue threading slow down other languages like Perl
> and Java?

I have no idea about Perl - but there's probably some hideous black
magic going on ;-)

As for Java, making code thread safe *does* slow down the code. It is
the very reason that the language designers made the collections API
non-thread safe by default (you have to wrap the standard collections
in a synchronised wrapper to make them thread safe).

--
Ant...




From bjourne at gmail.com  Thu Aug 23 08:20:21 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Thu, 23 Aug 2007 14:20:21 +0200
Subject: advice about `correct' use of decorator
In-Reply-To: <1187792001.935204.42330@e9g2000prf.googlegroups.com>
References: <46C4B097.4080309@fmed.uba.ar>
	<740c3aec0708170529s6f7e7fe2l8c92771c2d0a51d4@mail.gmail.com>
	<46C5C9AE.5020508@fmed.uba.ar>
	<mailman.112.1187787625.32294.python-list@python.org>
	<1187792001.935204.42330@e9g2000prf.googlegroups.com>
Message-ID: <740c3aec0708230520h6a92a29ar180efed41730f563@mail.gmail.com>

On 8/22/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
> On 22 ago, 10:00, "BJ?rn Lindqvist" <bjou... at gmail.com> wrote:
> > As I said, you can accomplish the exact same thing by calling a
> > function from within the function that requires the user to be logged
> > in.
> >
> > def change_pass():
> >     check_user_logged_in()
> >     ... more stuff here...
> >
> > is less complex (and therefore preferable) than:
> >
> > @check_user_logged_in
> > def change_pass():
> >     ... more stuff here...
> >
> > An important principle in engineering is that you should always strive
> > to make your design as simple as possible. If you have two equal
> > designs, you should always choose the one that is simpler because
> > simple things are easier to understand than complex things.
>
> I don't see the complexity in this case - both are a single line of
> code. Any internal complexity is hidden by the language. In fact, I

"Hiding" doesn't reduce complexity, quite the opposite.

> consider the decorated function simpler than the other: its body
> represents exactly what the function does, without any distracting
> precondition calls.

Think about how the decorator is implemented. It is a high order
function, taking a function and returning a new function. Something
like this:

def check_user_logged_in(func):
    def f(*args, **kwargs):
        if global_state.the_user.is_logged_in:
            return func(*args, **kwargs)
        return show_login_page()
    return f

@check_user_logged_in
def change_pass():
    ... more stuff here...

or:

def check_user_logged_in():
    return global_state.the_user.is_logged_in

def change_pass():
    if not check_user_logged_in():
        return show_login_page()
    ... more stuff here ...

or even:

def change_pass():
    if not global_state.the_user.is_logged_in:
        return show_login_page()
    ... more stuff here ...

> The decorator has some advantages: can have syntax support on your
> editor, can perform some registering/logging, it's even easier to
> quickly check visually if it's here.

The decorator has just as many disadvantages. For example, what if you
want to redirect back to the change_pass page once the user has
pressed the Login button on the login_page? Or if you want to show
different login pages depending on user properties? How much control
flow do you really want to "hide" in your decorator?

-- 
mvh Bj?rn


From nick at craig-wood.com  Sat Aug 18 07:30:05 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 18 Aug 2007 06:30:05 -0500
Subject: Python and Tkinter Programming--Expensive!
References: <Xllxi.9066$3x.1781@newssvr25.news.prodigy.net>
Message-ID: <slrnfcdj46.t75.nick@irishsea.home.craig-wood.com>

W. Watson <wolf_tracks at invalid.com> wrote:
>  Why is the book in Subject (author is Grayson) so expensive? $100 on Amazon 
>  and $195 on ABE. Aren't there alternatives?

There is an excellent section (266 pages) on TKinter in "Programming
Python" by Mark Lutz. I've got the 2nd edition.

Lutz concentrates on TK programming using classes, making re-usable
components which I found really helpful compared to the ad-hoc way I'd
seen TK presented previously.

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


From edgrsprj at ix.netcom.com  Thu Aug 30 22:04:31 2007
From: edgrsprj at ix.netcom.com (E.D.G.)
Date: Thu, 30 Aug 2007 20:04:31 -0600
Subject: Important Research Project
References: <13ddcvm1bsu3s94@corp.supernews.com> <46D6CA0E.E66ED5C8@yahoo.com>
Message-ID: <13deq9nj9atft62@corp.supernews.com>

"CBFalconer" <cbfalconer at yahoo.com> wrote in message
news:46D6CA0E.E66ED5C8 at yahoo.com...
> "E.D.G." wrote:


> Where is Perl described in the C standard?  This seems rather OT.

It has been my experience that a person who is an expert with one computer
language can usually do reasonably well when working with other languages.
I am trying to find some people who can assist with getting a Perl program
running.  It would probably be easier for expert programmers in any language
to help with this type of work compared with people such as myself who are
not experts in any programming language.






From ldo at geek-central.gen.new_zealand  Mon Aug 27 04:35:51 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 27 Aug 2007 20:35:51 +1200
Subject: Chaining programs with pipe
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
	<13cnbi87neru8c3@corp.supernews.com>
	<mailman.97.1187757319.32294.python-list@python.org>
	<13cogr3n6no937b@corp.supernews.com>
	<1187795716.083417.299540@q4g2000prc.googlegroups.com>
Message-ID: <fau28j$gle$3@lust.ihug.co.nz>

In message <1187795716.083417.299540 at q4g2000prc.googlegroups.com>, Gabriel
Genellina wrote:

> On 22 ago, 11:08, Grant Edwards <gra... at visi.com> wrote:
> 
>> but I'm a Unix guy who occasionally tries
>> to ship a Windows version of a Python app: the concept of a
>> process defaulting to having a stderr or stdout that wasn't
>> writable was utterly foreign to me.
>
> Ah, that explains your previous post telling that things on Windows
> don't work as they "should". They work, but not necesarily as a
> "foreigner" would expect.

So what's the good reason for Windows having unusable defaults for stderr
and stdout, then?


From nick at craig-wood.com  Tue Aug 28 07:30:07 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 28 Aug 2007 06:30:07 -0500
Subject: Python's Suitability?
References: <MPG.213d1a16e553c7fc9896d2@news.cox.net>
Message-ID: <slrnfd7uea.inq.nick@irishsea.home.craig-wood.com>

Michael R. Copeland <mrc2323 at cox.net> wrote:
>     I have some questions about the suitability of Python for some 
>  applications I've developed in C/C++.  These are 32 bit Console 
>  applications, but they make extensive use of STL structures and 
>  functions (Lists, Maps, Vectors, arrays) - primarily because the data 
>  volume is high (2,500,000+ records).

This is all bread and butter stuff to python and 10 times easier to do
in python than C++!

>     The main thing I'd like to do is port one part of the system that has 
>  a series of user menus and works with several text data files (one 
>  _very_ large).  I'm not using any database system, just my home-grown 
>  indexed sequential file database.  There's nothing but volume that 
>  precludes this application from running from almost any text file-
>  processing language system (e.g. Perl, BASIC, etc.).
>     From what little I've seen of Python, it appears I could port this 
>  application to Python code, but I'd do so only if I could:
>    1. Integrate it into a Web application in such a way that the user 
>  could select it as an option from a main page and have it execute as a 
>  WEB GUI application.  Currently, the application's interface is only a 
>  crude DOS window.

A web application is possible.  You can start your application which
would run its own embedded web server which the user could then
control.  Python has a web server in the standard library.  I've done
exactly this using cherrypy as a simple web application framework.

The asynchronous nature of web applications are often a pain.  You
could write a windows GUI using TKinter (which comes with python) or
WxPython (which doesn't).  Those toolkits make it very easy to make
GUI applications.

>    2. Assure that the performance isn't totally crippled by using Python, 
>  an interpretted language.  While I don't expect native C/C++ 
>  performance, I don't want to be embarrassed...

Depends exactly what you are doing.  If you are IO limited then Python
is just as fast as C++.

If you are doing lots of calculation on the data then python can be
slow.  You can use the numpy library which is a library of scientific
maths routines all coded in C for speed which is very quick.

  http://numpy.scipy.org
  http://sourceforge.net/projects/numpy

>    3. Make sure that the volume of stored data (2.5+ million records) can 
>  be accommodated in Python structures (I don't know enough about Python 
>  to answer this question...).

I wouldn't have thought that would be a problem.

>     Note that I'm not considering using the existing C/C++ code in my Web 
>  application, because I don't know how to write a C/C++ Windows 
>  application - and I'm sure the learning curve here is greater than 
>  Python's.

You could always use ctypes from python to interface with your C
code.  If you can export your code in a DLL then ctypes can use it.
(Not sure about C++ though)

> I'm a very old procedural-based application developer (47+ 
>  years of programming experience), and developing Windows applications is 
>  beyond me.
>     So, I only (?) want to take an existing application that uses a large 
>  text file (and several smaller text indexing files) and put it into a 
>  Web system I already have.  I feel Python (or Perl) is(are) my best 
>  option(s), and here I'm only looking for some initial guidance from the 
>  Python users.  TIA

Go for it!  Python is such an easy language to write stuff in
(escpecially compared to C++) that you'll have the prototype done very
quickly and you can evaluate the rest of your concerns with working
code!

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


From hniksic at xemacs.org  Thu Aug  9 17:55:27 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 09 Aug 2007 23:55:27 +0200
Subject: Puzzled by "is"
References: <20070809194105.39BD11E400A@bag.python.org>
	<f9frbl$dps$1@sea.gmane.org>
	<mailman.1814.1186692638.22759.python-list@python.org>
Message-ID: <87ejicl6eo.fsf@mulj.homelinux.net>

Grzegorz S?odkowicz <jergosh at wp.pl> writes:

>> Seriously, it's just an optimization by the implementers. There is
>> no need for more than one empty tuple, since tuples can never be
>> modified once created.
>>
>> But they decided not to create (1, ) in advance. They probably knew
>> that hardly anybody would want to create that tuple ;-) [Seriously:
>> if you started trying to predict which tuples would be used you
>> would go insane, but the empty tuple is the most likely candidate].
>>
> That's just theorisation but I'd rather expect the interpreter simply
> not to create a second tuple while there already is an identical
> one.

But then tuple creation would be slowed down by searching for whether
an "identical one" already exists.  In the general case, that is quite
unlikely, so it's not done.  (I suspect that only the requirement to
store the list of all tuples somewhere would outweigh any potential
gains of this strategy; and if the search were implemented as a hash
table lookup, even more space would be wasted.)  It's done for the
empty tuple because no search is necessary, only a size test.

> Admittedly the empty tuple is a special case but then 'Special cases
> aren't special enough to break the rules'.

Except no rule is being broken.  As others have pointed out, since
tuples are immutable, caching them is quite safe.


From bdesth.quelquechose at free.quelquepart.fr  Thu Aug 30 08:59:19 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 30 Aug 2007 14:59:19 +0200
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188517050.174081.265900@x40g2000prg.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<1188430887.481586.106760@l22g2000prc.googlegroups.com>
	<mailman.159.1188499976.28954.python-list@python.org>
	<1188504811.019632.186580@x35g2000prf.googlegroups.com>
	<46d75116$0$401$426a74cc@news.free.fr>
	<1188517050.174081.265900@x40g2000prg.googlegroups.com>
Message-ID: <46d75d33$0$6231$426a34cc@news.free.fr>

Russ a ?crit :
> Bruno Desthuilliers wrote:
> 
>>Russ a ?crit :
>>(snip)
>>
>>
>>>I don't see how you can avoid adding some new syntax, given that
>>>Python does not
>>>currently have syntax for specifying invariants and pre- and post-
>>>conditions.
>>
>>class Parrot(object):
>>   @pre(lambda x : x != 42)
>>   @post(lambda result: result != 42)
>>   @invariant(lambda self: self.x == 42)
>>   def reliable_method(self, x):
>>     # your code here
>>     return something
> 
> 
> That looks like new syntax to me. 

It's the syntax for decorator functions, and it's not that new - it 
cames with Python 2.4, released November 30, 2004.

> Did I miss your point?

Yes.


From aisaac at american.edu  Fri Aug 31 00:55:00 2007
From: aisaac at american.edu (Alan Isaac)
Date: Fri, 31 Aug 2007 04:55:00 GMT
Subject: create Powerpoint via com
In-Reply-To: <1188500822.869925.194430@e9g2000prf.googlegroups.com>
References: <j7EBi.13372$Yg.7724@trnddc02>
	<1188500822.869925.194430@e9g2000prf.googlegroups.com>
Message-ID: <EaNBi.20336$vg.15115@trnddc04>

kyosohma at gmail.com wrote:
> <code>

OK, creating bulleted lists, or tables,
or adding pictures is all straightforward.
How about chart creation (in Ppt 2003)?
I do not see how to do this with Python.

Thanks,
Alan


From linnewbie at gmail.com  Sun Aug 12 13:21:02 2007
From: linnewbie at gmail.com (linnewbie at gmail.com)
Date: Sun, 12 Aug 2007 17:21:02 -0000
Subject: Regular Expression Grouping
Message-ID: <1186939262.144073.182450@z24g2000prh.googlegroups.com>

Fairly new to this regex thing, so this might be very juvenile but
important.

I cannot understand and why 'c' constitutes a group here without being
surrounded by "(" ,")" ?

>>>import re
>>> m = re.match("([abc])+", "abc")
>>> m.groups()
('c',)

Grateful for any clarity.



From Jameson.Quinn at gmail.com  Mon Aug 27 17:35:35 2007
From: Jameson.Quinn at gmail.com (Jameson.Quinn at gmail.com)
Date: Mon, 27 Aug 2007 14:35:35 -0700
Subject: "Try:" which only encompasses head of compound statement
Message-ID: <1188250535.607963.42540@22g2000hsm.googlegroups.com>

I have:

try:
    for line in open(myFileName):
        count += 1
except IOError:
    print "Can't open myfile"

(I know, this is bad, I never close the file, but its just for
illustration). But then I change it to:

try:
    for line in open(myFileName):
        count += openAndProcessSubfile(line)
except IOError:
    print "Can't open myfile"

... now the 'except' incorrectly catches errors from
openAndProcessSubfile.
Of course, I can always do:

try:
    myFile = open(myFileName)
except IOError:
    print "Can't open myfile"
for line in myFile:
    count += openAndProcessSubfile(line)

...But if my compound statement is "with" instead of "for" that seems
to defeat the purpose:

try:
    myFile = open(myFileName)
except IOError:
    print "Can't open myfile"
with myFile as anotherNameForMyFile:
    ....

This is not a very readable "with" statement, I end up giving the same
thing two names, and there's a moment when the above code doesn't know
to close myFile.

It's hard to imagine a good idiom to fix this. The best I can do is:

for line in open(myFileName)
    exceptHead IOError:
        print "Can't open myfile"
    count += openAndProcessSubfile(line)

exceptHead would be usable as the first indented line in any compound
statement, and would catch any errors raised by the preceding line
only. The bad thing about this (besides the silly name exceptHead) is
that after the except block, control flow would skip the entire
compound statement including else blocks.



From max at alcyone.com  Fri Aug 31 05:37:15 2007
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 31 Aug 2007 02:37:15 -0700
Subject: list index()
In-Reply-To: <1188551958.728836.137370@x35g2000prf.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<1188497498.3468.60.camel@dot.uniqsys.com>
	<mailman.188.1188546300.28954.python-list@python.org>
	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
	<1188551958.728836.137370@x35g2000prf.googlegroups.com>
Message-ID: <fOadnfwlCJbQfErbnZ2dnUVZ_jCdnZ2d@speakeasy.net>

Paddy wrote:

> I say the 'oll' in troll like the 'ol' in frolic, and pronounce roll
> and role similarly.
>
> My accent is probably from the East Midlands of the UK, but is not
> pronounced.

_Troll_ and _frolic_ aren't pronounced with the same "o" sound in any 
accent I've ever heard of.  Which you pronounce _boat_ and _bot_ the 
same way, too?

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   There are no dull subjects. There are only dull writers.
    -- H.L. Mencken


From mcl.office at googlemail.com  Sun Aug 26 15:43:13 2007
From: mcl.office at googlemail.com (mcl)
Date: Sun, 26 Aug 2007 12:43:13 -0700
Subject: Joining Big Files
In-Reply-To: <1188139515.349468.315290@q5g2000prf.googlegroups.com>
References: <1188035844.616831.205350@i38g2000prf.googlegroups.com>
	<1188090939.364787.296630@r34g2000hsd.googlegroups.com>
	<1188092913.645157.15370@o80g2000hse.googlegroups.com>
	<1188139515.349468.315290@q5g2000prf.googlegroups.com>
Message-ID: <1188157393.234494.62500@w3g2000hsg.googlegroups.com>

On 26 Aug, 15:45, vasudevram <vasudev... at gmail.com> wrote:
> On Aug 26, 6:48 am, Paul McGuire <pt... at austin.rr.com> wrote:
>
>
>
> > On Aug 25, 8:15 pm, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > On Aug 25, 4:57 am,mosscliffe<mcl.off... at googlemail.com> wrote:
>
> > > > I have 4 text files each approx 50mb.
>
> > > <yawn> 50mb? Really?  Did you actually try this and find out it was a
> > > problem?
>
> > > Try this:
> > > import time
>
> > > start = time.clock()
> > > outname = "temp.dat"
> > > outfile = file(outname,"w")
> > > for inname in ['file1.dat', 'file2.dat', 'file3.dat', 'file4.dat']:
> > >     infile = file(inname)
> > >     outfile.write( infile.read() )
> > >     infile.close()
> > > outfile.close()
> > > end = time.clock()
>
> > > print end-start,"seconds"
>
> > > For 4 30Mb files, this takes just over 1.3 seconds on my system.  (You
> > > may need to open files in binary mode, depending on the contents, but
> > > I was in a hurry.)
>
> > > -- Paul
>
> > My bad, my test file was not a text file, but a binary file.
> > Retesting with a 50Mb text file took 24.6 seconds on my machine.
>
> > Still in your working range?  If not, then you will need to pursue
> > more exotic approaches.  But 25 seconds on an infrequent basis does
> > not sound too bad, especially since I don't think you will really get
> > any substantial boost from them (to benchmark this, I timed a raw
> > "copy" command at the OS level of the resulting 200Mb file, and this
> > took about 20 seconds).
>
> > Keep it simple.
>
> > -- Paul
>
> There are (at least) another couple of approaches possible, each with
> some possible tradeoffs or requirements:
>
> Approach 1. (Least amount of code to write - not that the others are
> large :)
>
> Just use os.system() and the UNIX cat command - the requirement here
> is that:
> a) your web site is hosted on *nix (ok, you can do it if on Windows
> too - use copy instead of cat, you might have to add a "cmd /c "
> prefix in front of the copy command, and you have to use the right
> copy command syntax for concatenating multiple input files into one
> output file).
>
> b) your hosting plan allows you to execute OS level commands like cat,
> and cat is in your OS PATH (not PYTHONPATH). (Similar comments apply
> for Windows hosts).
>
> import os
> os.system("cat file1.txt file2.txt file3.txt file4.txt >
> file_out.txt")
>
> cat will take care of buffering, etc. transparently to you.
>
> Approach 2: Read (in a loop, as you originally thought of doing) each
> line of each of the 4 input files and write it to the output file:
>
> ("Reusing" Paul McGuire's code above:)
>
> outname = "temp.dat"
> outfile = file(outname,"w")
> for inname in ['file1.dat', 'file2.dat', 'file3.dat', 'file4.dat']:
>     infile = file(inname)
>     for lin in infile:
>         outfile.write(lin)
>     infile.close()
> outfile.close()
> end = time.clock()
>
> print end-start,"seconds"
>
> # You may need to check that newlines are not removed in the above
> code, in the output file.  Can't remember right now. If they are, just
> add one back with:
>
> outfile.write(lin + "\n") instead of  outfile.write(lin) .
>
> ( Code not tested, test it locally first, though looks ok to me. )
>
> The reason why this _may_ not be much slower than manually coded
> buffering approaches, is that:
>
> a) Python's standard library is written in C (which is fast),
> including use of stdio (the C Standard IO library, which already does
> intelligent buffering)
> b) OS's do I/O buffering anyway, so do hard disk controllers
> c) from some recent Python version, I think it was 2.2, that idiom
> "for lin in infile" has been (based on somethng I read in the Python
> Cookbook) stated to be pretty efficient anyway (and yet (slightly)
> more readable that earlier followed approaches of reading a text
> file).
>
> Given all the above facts, it probably isn't worth your while to try
> and optimize the code unless and until you find (by measurements) that
> it's too slow - which is a good practice anyway:
>
> http://en.wikipedia.org/wiki/Optimization_(computer_science)
>
> Excerpt from the above page (its long but worth reading, IMO):
>
> "Donald Knuth said, paraphrasing Hoare[1],
>
> "We should forget about small efficiencies, say about 97% of the time:
> premature optimization is the root of all evil." (Knuth, Donald.
> Structured Programming with go to Statements, ACM Journal Computing
> Surveys, Vol 6, No. 4, Dec. 1974. p.268.)
>
> Charles Cook commented,
>
> "I agree with this. It's usually not worth spending a lot of time
> micro-optimizing code before it's obvious where the performance
> bottlenecks are. But, conversely, when designing software at a system
> level, performance issues should always be considered from the
> beginning. A good software developer will do this automatically,
> having developed a feel for where performance issues will cause
> problems. An inexperienced developer will not bother, misguidedly
> believing that a bit of fine tuning at a later stage will fix any
> problems." [2]
> "
>
> HTH
> Vasudev
> -----------------------------------------
> Vasudev Ramhttp://www.dancingbison.comhttp://jugad.livejournal.comhttp://sourceforge.net/projects/xtopdf
> -----------------------------------------

All,

Thank you very much.

As my background is much smaller memory machines than today's giants -
64k being a big machine and 640k being gigantic. I get very worried
about crashing machines when copying or editing big files, especially
in a multi-user environment.

Mr Knuth - that brings back memories.  I rememeber implementing some
of his sort routines on a mainframe with 24 tape units and an 8k drum
and almost eliminating one shift per day of computer operator time.

Thanks again

Richard





From ptmcg at austin.rr.com  Wed Aug  1 09:18:53 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 01 Aug 2007 06:18:53 -0700
Subject: access the name of my method inside it
In-Reply-To: <1185973639.234450.305690@g12g2000prg.googlegroups.com>
References: <1185959202.302467.276080@x35g2000prf.googlegroups.com>
	<5hb1ebF3inuf2U6@mid.uni-berlin.de>
	<1185973639.234450.305690@g12g2000prg.googlegroups.com>
Message-ID: <1185974333.891840.279460@l70g2000hse.googlegroups.com>

On Aug 1, 8:07 am, james_027 <cai.hai... at gmail.com> wrote:
> Hi,
>
> On Aug 1, 5:18 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>
> > On Wed, 01 Aug 2007 09:06:42 +0000, james_027 wrote:
> > > for example I have this method
>
> > > def my_method():
> > >     # do something
>
> > >     # how do I get the name of this method which is my_method here?
>
> > Why do you need this?  There are ways but those are not really good for
> > production code.
>
> I am going to use this in Django. I am trying to implement a
> permission here, where in the database store the methods that the user
> are allowed to execute. for example if the method is def
> create_event(): the method will look for create_event in the database
> to see if it allow to be execute.
>
> Thanks.
> james

How about using a decorator?  Here is a rough version:

def checkPrivs(fn):
    fnName = fn.func_name
    def restricted(*args):
        print "about to call function", fnName
        if fnName in listOfAllowedFunctions:
            return fn(*args)
        else:
            raise KeyError("you don't have sufficient privileges to do
THAT")
    return restricted

listOfAllowedFunctions = ['add','subtract']

@checkPrivs
def add(a,b):
    return a+b

@checkPrivs
def subtract(a,b):
    return a-b

@checkPrivs
def multiply(a,b):
    return a*b

add(1,2)
subtract(4,1)
multiply(3,2)

-- Paul




From greg at cosc.canterbury.ac.nz  Wed Aug  8 21:02:00 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Thu, 09 Aug 2007 13:02:00 +1200
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <1186583168.447608.114040@d55g2000hsg.googlegroups.com>
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
	<1186583168.447608.114040@d55g2000hsg.googlegroups.com>
Message-ID: <5hv7jeF3m75aqU1@mid.individual.net>

Istvan Albert wrote:
> A solution would be writing the code with a logging function to begin
> with, alas many times that is out of one's hand.

If the code has been written with calls to a builtin
print function, the situation isn't much better. You
could monkeypatch the print function, but that's
probably worse than swapping sys.stdout.

(I agree that print should be a function, simply because
there's no strong reason for it *not* to be. But I
don't think it makes a difference to this particular
problem.)

--
Greg


From martin at v.loewis.de  Wed Aug 22 15:30:57 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 22 Aug 2007 21:30:57 +0200
Subject: MsiLib
In-Reply-To: <mailman.124.1187804959.32294.python-list@python.org>
References: <mailman.124.1187804959.32294.python-list@python.org>
Message-ID: <46cc8ef1$0$5970$9b622d9e@news.freenet.de>

> I am trying to figure out how to use msilib to extract the registry
> information from an MSI file and I really could use a good example of
> how that is accomplished or even just an example using msilib in
> general. Does anybody happen to know of an example for this as I wasn't
> able to find one? If there isn't one, would anybody be willing to throw
> one together?

You need to look at the Registry table, whose structure is described here:

http://msdn2.microsoft.com/en-us/library/Aa371168.aspx

In particular, the fields you need to look at are Key, Name,
and Value. Notice that Value is Formatted, so you may have to
expand the formatting first (looking at further tables possibly).

The rough sequence of actions would be

db = msilib.OpenDatabase(path, MSIDBOPEN_READONLY)
view = db.OpenView("SELECT Key, Name, Value FROM Registry")
while True:
  record = view.Fetch()
  if not record: break
  print record.GetString(1), record.GetString(2), record.GetString(3)

Unfortunately, GetString is not implemented yet, so it might be that
what you want to do is not possible yet.

HTH,
Martin


From deets at nospam.web.de  Wed Aug  1 11:16:16 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 01 Aug 2007 17:16:16 +0200
Subject: Python end of file marker similar to perl's __END__
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
	<1185976656.753817.27980@x40g2000prg.googlegroups.com>
Message-ID: <5hbme0F3jck3bU1@mid.uni-berlin.de>

beginner wrote:

> On Jul 31, 10:53 pm, beginner <zyzhu2... at gmail.com> wrote:
>> Hi All,
>>
>> This is just a very simple question about a python trick.
>>
>> In perl, I can write __END__ in a file and the perl interpreter will
>> ignore everything below that line. This is very handy when testing my
>> program. Does python have something similar?
>>
>> Thanks,
>> Geoffrey
> 
> Thanks everyone for responding. It doesn't look like python has it. I
> would definitely miss it. As Steve said, the nice thing about __END__
> is that things below __END__ do not have to have legit syntax. That
> let me focus on the lines of code I am debugging and do not have to
> worry about some bad syntax down the line. This feature is especially
> handy if I am, saying, replacing modoules or changing data structures.

In emacs, I simply mark that portion of code and do

M-x comment-region

That's it. And I don't think a language should support things __END__ -
commenting is enough. It's unfortunate that Python doesn't support
multi-line-comments though. But as I said, that my Editor can handle for
me.

Diez


From coyote_x at artcom.pl  Thu Aug  2 02:17:13 2007
From: coyote_x at artcom.pl (Adam Kubica)
Date: Thu, 02 Aug 2007 08:17:13 +0200
Subject: Equivalent to gzinflate() function in PHP.
References: <pan.2007.08.01.13.44.47.273887@artcom.pl>
	<1185976461.491418.20230@i38g2000prf.googlegroups.com>
Message-ID: <pan.2007.08.02.06.17.09.653367@artcom.pl>

On Wed, 01 Aug 2007 13:54:21 +0000, kyosohma wrote:

> On Aug 1, 8:44 am, Adam Kubica <coyot... at artcom.pl> wrote:
>> Hellou.
>>
>> Anybody know about code that work equivalent to gzinflate()
>> function used in PHP?
>>
>> I search via google but I don't found anything sensible :-(
> 
> I'm not sure what gzinflate does, but it looks like it's some kind of
> compression/decompression method. Python can do that. Check out the
> following links:
> 
> http://www.python.org/doc/lib/module-gzip.html
> http://www.python.org/doc/lib/module-zlib.html
> http://python.active-venture.com/lib/module-bz2.html
> 
> Hopefully this is the type of thing you were looking for.
> 

OK, but it isn't that I looking for :-(

gzinflate() is reversed function of gzdeflate(), zlib module allows to use
compress methon only, it's equivalent to gzcompress() in PHP.



From nospam.themindstorm at gmail.com  Thu Aug  2 04:18:30 2007
From: nospam.themindstorm at gmail.com (Alex Popescu)
Date: Thu, 2 Aug 2007 08:18:30 +0000 (UTC)
Subject: Pythonic way for missing dict keys
References: <mailman.938.1184958565.22759.python-list@python.org>
	<pan.2007.07.21.00.20.54.768439@REMOVE.THIS.cybersource.com.au>
	<mailman.954.1184989959.22759.python-list@python.org>
	<Xns99748CC2DB4AAduncanbooth@127.0.0.1>
	<1185041243.323915.161230@x40g2000prg.googlegroups.com>
	<mailman.984.1185101740.22759.python-list@python.org>
	<87lkd0eprj.fsf@pobox.com>
	<mailman.1279.1185623588.22759.python-list@python.org>
	<pan.2007.07.29.04.10.19.329342@REMOVE.THIS.cybersource.com.au>
	<46b0ed0b$0$2257$426a74cc@news.free.fr>
Message-ID: <Xns998072B0DEA74themindstorm@80.91.229.5>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote in
news:46b0ed0b$0$2257$426a74cc at news.free.fr: 

> Steven D'Aprano a ?crit :
> (snip)
> 
>> Instead of doing:
> 
>> if callable(function): function()
>> 
>> you should do:
>> 
>> try:
>>     function()
>> except TypeError:
>>     pass
> 
> There are time where you may want to know if you have a callable
> without calling it...
> 
>> That should work for most uses of callable(), but isn't quite the
>> same. (What if function() has side-effects, or is expensive, and you
>> want to determine if it is callable, but not actually call it _now_?)
> 
> Indeed.
> 
> The 'correct' replacement would be:
> 
> if hasattr(obj, '__call__'):
>    # it's a callable
> 
> but I don't find it so Pythonic to have to check for a __magic__
> method. 
> 
> 

It looks like Python devs have decided it is Pythonic, because it is 
already in the PEP. Same for execfile and the others. And I am not 
arguing pro or con. I was just wondering about the reasons, as I haven't 
been able to find anything (neither here nor on the dev group).

bests,
./alex
--
.w( the_mindstorm )p.



From fernandofariajunior at gmail.com  Fri Aug 31 15:33:04 2007
From: fernandofariajunior at gmail.com (fernando)
Date: Fri, 31 Aug 2007 19:33:04 -0000
Subject: Registering a python function in C
In-Reply-To: <1188516423.744038.309700@z24g2000prh.googlegroups.com>
References: <1188508874.879215.319400@i13g2000prf.googlegroups.com>
	<1188516423.744038.309700@z24g2000prh.googlegroups.com>
Message-ID: <1188588784.764658.317570@r34g2000hsd.googlegroups.com>

Thanks for the responses. To be more specific, this code is part of a
Maya plugin. The funcion MFnPlugin::registerUI takes a pointer to a
PyObject which is the function that will set up the UI for that
plugin. The code Matimus posted seems to me exactly like what I need
to do, except that maya gives me an error when I call
PyImport_ImportModule... I don't even have a chance to check the
return value, Maya simply gives up. I have checked that python is
initialized by the time I call this function, and the python path is
correct, I can load the module from the maya python interpreter. What
bugs me is that PyImport_ImportModule doesn't even return, it should
return 0 if something bad happened, right?

Here's my code:

if(Py_IsInitialized())
     cout << "python is already initialized" << endl;
if(!Py_IsInitialized()){
     cout << "had do initialize python" << endl;
     Py_Initialize();
}
PyObject* mod= PyImport_ImportModule("vzPyTest");
if(mod == 0){
     cout << "didn't load" << endl;
}
PyObject* func1 = PyObject_GetAttrString(mod, "vzPyTest.test1");
PyObject* func2 = PyObject_GetAttrString(mod, "vzPyTest.test2");
plugin.registerUI(func1, func2);


Thanks for the help!!!



From unlikeablePorpoise at gmail.com  Tue Aug 14 08:52:49 2007
From: unlikeablePorpoise at gmail.com (unlikeablePorpoise at gmail.com)
Date: Tue, 14 Aug 2007 12:52:49 -0000
Subject: JPype - passing to Java main
In-Reply-To: <mailman.1941.1187047345.22759.python-list@python.org>
References: <1187040070.806416.75090@r34g2000hsd.googlegroups.com>
	<mailman.1941.1187047345.22759.python-list@python.org>
Message-ID: <1187095969.789811.63960@j4g2000prf.googlegroups.com>

>
> Try this:
> com.JPypeTest.main("arg")
>
> Ian

Thanks for your suggestion, but it doesn't work (produces an error).

Does anybody else have any ideas?

Thanks,
Sarah



From wildemar at freakmail.de  Wed Aug 22 18:11:24 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Thu, 23 Aug 2007 00:11:24 +0200
Subject: Import question
In-Reply-To: <46CCAE52.3000800@freakmail.de>
References: <eb79828c0708221351v5aab6849pc38fce55f4f7eea@mail.gmail.com>
	<46CCAE52.3000800@freakmail.de>
Message-ID: <46CCB48C.2000707@freakmail.de>

Lamonte Harris wrote:
> On 8/22/07, *Wildemar Wildenburger* <wildemar at freakmail.de 
> <mailto:wildemar at freakmail.de> > wrote:
>
>     So your'e basically saying that you haven't tried it?
>
> No I haven't.  Thats why I asked?  Common sense?
Sorry. Excuse my sarcasm. The common way for answering easy questions like this one is firing up the interpreter and trying it for yourself.
You don't go up to a shoestore clerk to ask whether your shoes might fall off if you tie them sloppily, do you? Thats just wasting everyones time.

And regarding your question:
Python 2.5 (r25:51908, Apr 10 2007, 10:29:13) 
[GCC 4.1.2 20070403 (Red Hat 4.1.2-8)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys, datetime
>>> sys.platform, datetime.datetime.now()
('linux2', datetime.datetime(2007, 8, 23, 0, 1, 41, 727155))


Hint for the future: Please try these things before asking. If *then* you have a problem, ask.
/W



From kyosohma at gmail.com  Mon Aug 27 09:14:02 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 27 Aug 2007 06:14:02 -0700
Subject: wx.grid and different Value Choice each line ?
In-Reply-To: <46d2a1f9$0$27412$ba4acef3@news.orange.fr>
References: <46d2a1f9$0$27412$ba4acef3@news.orange.fr>
Message-ID: <1188220442.944332.102910@57g2000hsv.googlegroups.com>

On Aug 27, 5:08 am, BH <B... at bh.com> wrote:
> Hi,
>
> Hox can I have different value choice for each line in a grid with
> wxPython ?
> I want to develop a small software for satisfaction surveys. Each line
> of the grid is a different question. Sometimes answers are the sames
> between two lines, but sometimes not.
>
> Thx,
>
> Bertrand

I don't know if you can insert a combobox into a grid object or not.
It's probably possible. You should post your question to the wxPython
group though since this is a very specific issue. See here:
http://www.wxpython.org/maillist.php

If it was me though, I would probably use a wizard and put my
questions and choices on it. Or maybe use a notebook control.

Mike



From chris.hamons at gmail.com  Sat Aug 25 13:04:44 2007
From: chris.hamons at gmail.com (chris.hamons at gmail.com)
Date: Sat, 25 Aug 2007 17:04:44 -0000
Subject: Debugging a curses application in python
Message-ID: <1188061484.516090.231200@q5g2000prf.googlegroups.com>

Hello all,

I'm trying to debug a python application which uses the curses module
under Linux. I'm having trouble, since I can't get any debugger to
work. Is there a way to separate the output of an application from the
debugger. In gdb, the tty command would allow me to specify a separate
tty to write the curses output to. Any suggestions?

Thanks,
--Chris Hamons



From steve at holdenweb.com  Thu Aug 23 23:12:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 23 Aug 2007 23:12:30 -0400
Subject: creating a tar file with python
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE2EC@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
	<faktv8$8fs$1@sea.gmane.org>
	<93066C069973ED448DC2BCEA9C44A7383BE2EC@efmailx>
Message-ID: <46CE4C9E.2020301@holdenweb.com>

Brian McCann wrote:
> 
> Hi,
>  
> I tried Steve's solution but get this error
> using the tar script below
> --Brian
> 
> tar = tarfile.open(".","test.tar.gz",w:gz)
> [viz at vizbld02 tmp]$ ./tarup.py
>   File "./tarup.py", line 24
>     tar = tarfile.open(".","test.tar.gz",w:gz)
>                                           ^
> SyntaxError: invalid syntax
> ######################################################
>  
> #!/usr/bin/python
> import string
> import os
> import sys
> import time
> import errno
> import shutil
> import tarfile
> 
> tar = tarfile.open(".","test.tar.gz",w:gz)
> <mailto:brian.mccann at viziant.net>
>  
>  
> 
> *From:* python-list-bounces+brian.mccann=viziant.net at python.org on 
> behalf of Steve Holden
> *Sent:* Thu 8/23/2007 5:24 PM
> *To:* python-list at python.org
> *Subject:* Re: creating a tar file with python
> 
> Brian McCann wrote:
>  > Hi,
>  > 
>  > I'm trying to create a tar file of the contents of the current directory
>  > 
>  > right now there is only one file "text.xml" in the current dir,  I'm
>  > using"." current dir as source
>  > but that gives syntax error
>  >
>  > any help would be greatly appreciated
>  > --Brian
>  > 
>  > 
>  > #!/usr/bin/python
>  > import string
>  > import os
>  > import sys
>  > import time
>  > import errno
>  > import shutil
>  > import tarfile
>  > 
>  >
>  > tar = tarfile.open(.,"test.tar.gz", "w:gz)
>  > <mailto:brian.mccann at viziant.net>
>  > 
>  >
> well, /probably/ (meaning I haven't done any testing) you need quotes
> around the name of the current directory just like you do around the
> name of the file. Try
> 
>    tar = tarfile(".", "test.tar.gz", "w:gz")
> 
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd           http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
[Jeez, doesn't anybody use standard-conformant mailers any more: why is 
my signature quoted above, and what it it supposed to add? Couldn't you 
have taken a second to delete it: that would probably have taken about 
35 MB off the Internet backbone. Or perhaps you think that all resources 
are unlimited? Sorry, I'm a bit cranky this week, being short of sleep.]

I admitted my code was untested, but I believe if you had 
copied-and-pasted you would not have received the error you did (which 
is not to say you wouldn't have received some other error).

Don't run what you /think/ I wrote, run /what I wrote/, as pasted by 
your operating system, dammit. Or are you running on some platform that 
doesn't allow you to select what I wrote and paste it into an editor window?

sholden at bigboy /tmp
$ cat > Brian\'s\ Original
tar = tarfile.open(.,"test.tar.gz", w:gz)

sholden at bigboy /tmp
$ cat > what\ I\ wrote
tar = tarfile(".", "test.tar.gz", w:gz")

sholden at bigboy /tmp
$ diff Brian\'s\ Original what\ I\ wrote
1c1
< tar = tarfile.open(.,"test.tar.gz", w:gz)
---
 > tar = tarfile(".", "test.tar.gz", "w:gz")

sholden at bigboy /tmp

Hmm, you probably don't understand the gobbledygook above, but what it 
means is that you didn't pay sufficient attention to detail. This isn't 
a serious problem: Google will probably show you several thousand 
occurrences of me exhibiting similar symptoms. But remember, computers 
are TOMCATs: Thoroughly Obedient Moron, Cannot Actually Think.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From vasudevram at gmail.com  Wed Aug 15 12:37:06 2007
From: vasudevram at gmail.com (vasudevram)
Date: Wed, 15 Aug 2007 16:37:06 -0000
Subject: Python Book Recommendations
In-Reply-To: <1187192077.005818.174440@i13g2000prf.googlegroups.com>
References: <d5506a9f0708141439v6a30d4c8l5092b30d269c1af4@mail.gmail.com>
	<Pine.LNX.4.44.0708141556370.5396-100000@violet.rahul.net>
	<1b31ae500708141638w77614014o6f382d0389bc69df@mail.gmail.com>
	<mailman.2015.1187189280.22759.python-list@python.org>
	<1187191803.845011.30400@x35g2000prf.googlegroups.com>
	<1187192077.005818.174440@i13g2000prf.googlegroups.com>
Message-ID: <1187195826.232055.217260@x40g2000prg.googlegroups.com>

On Aug 15, 8:34 pm, kyoso... at gmail.com wrote:
> On Aug 15, 10:30 am, Azazello <tyle... at jeld-wen.com> wrote:
>
>
>
> > On Aug 15, 7:47 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
>
> > > If I could have only one book, I would buy "Core Python, Second
> > > Edition," by Wesley Chun.
>
> > > For the record, I own:
> > > Core Python, Second Edition (great)
> > > wxPython in Action (haven't used yet)
> > > Beginning Python (barely used)
> > > Python in a Nutshell (use as a reference, although interactive python
> > > dir() is more useful)
> > > Dive into Python (great book)
> > > Python Cookbook (great book)
> > > Python Pocket Reference (not very useful)
> > > Python Phrasebook (I love the Phrasebook series, but this isn't a
> > > necessary book)
>
> > I would like to add:
>
> > Foundations of Python Network Programming
>
> > I also use the Python Essential Reference.  (although all of the
> > information is probably online it's nice to have a solid paper
> > reference)
>
> Depending on what you're doing, a book can actually be faster than
> Google! Of course, a lot of these books don't cover any 3rd party
> modules, so Google is still very handy.
>
> Mike

I second some of those recommendations - for the books I own / have
read:

Python Cookbook - excellent
Python in a Nutshell - excellent

Though interactive dir() is good, it doesn't give you a lot of things
that Python in a Nutshell and the official Python docs do - rules of
the language, info on new-style classes, etc. Also, Google for "Guide
to Python Introspection" - a good online article that shows a lot more
about that topic, over and above use of dir().

Also: Programming Python - excellent.

Didn't know about the Python Network programming book - thanks, will
check it out.

Vasudev Ram
http://www.dancingbison.com
http://jugad.livejournal.com
http://sourceforge.net/projects/xtopdf




From jjl at pobox.com  Mon Aug 20 15:53:54 2007
From: jjl at pobox.com (John J. Lee)
Date: Mon, 20 Aug 2007 19:53:54 GMT
Subject: desperately in need of a tool
References: <1187560418.339131.283470@i38g2000prf.googlegroups.com>
Message-ID: <87d4xix9rh.fsf@pobox.com>

yagyala <mbrown at phys.ksu.edu> writes:

> I recently started working for a company that has just implemented its
> first set of software standards. So far, so good. Here's the problem:
> one of those standards is that the comments for each routine must
> indicate every other routine that it calls. As I try to keep my
> routines small, and factor out methods alot, this can lead to an
> enormous ammount of extra typing. I really, really, really don't want
> to do this by hand. Does anyone know of a tool that could do this for
> me, or at least a tool that can tell what other routines a given
> routine calls that I could program against? (Preferably something that
> works under pydev, but I'm not going to be choosy.)

import tokenize

for token in tokenize.generate_tokens(open("foo.py")):
    print token


Note module token, also.  Module inspect may also be of use:

http://docs.python.org/lib/inspect-source.html


Also, Python 2.5 introduced a new AST, which I haven't had occasion to
use yet (not even certain whether it ended up getting exposed it to
Python, or just staying on the C level...)


Possibly you could even persuade some existing source code analysis
tool to do exactly the job you want for you -- but it's probably much
easier just to write what you need yourself.


John


From byte8bits at gmail.com  Thu Aug  9 10:04:50 2007
From: byte8bits at gmail.com (brad)
Date: Thu, 09 Aug 2007 10:04:50 -0400
Subject: tests
In-Reply-To: <1186666919.456036.120270@d30g2000prg.googlegroups.com>
References: <mailman.1792.1186665714.22759.python-list@python.org>
	<1186666919.456036.120270@d30g2000prg.googlegroups.com>
Message-ID: <f9f70t$dpm$1@solaris.cc.vt.edu>

kyosohma at gmail.com wrote:

> You should be able to read chunks of each file in binary mode and do a
> compare to check for equality. Some kind of loop should do the trick.

Why not a simple md5 or sha with the hash library?


From steve at holdenweb.com  Thu Aug 16 20:34:42 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Aug 2007 20:34:42 -0400
Subject: Pass by reference or by value?
In-Reply-To: <496954360708161526o5b6a0fffof2fbd5227244e709@mail.gmail.com>
References: <496954360708161402x58faba47x7a6eae6e68f81d4@mail.gmail.com>	<fa2gbe$uq7$1@sea.gmane.org>	<496954360708161501s541bddb7vfe168e4863f7f1e@mail.gmail.com>	<46C4CCAD.3080104@holdenweb.com>
	<496954360708161526o5b6a0fffof2fbd5227244e709@mail.gmail.com>
Message-ID: <fa2qeu$q6i$1@sea.gmane.org>

Robert Dailey wrote:
[but he top-posted, so he should consider himself smacked on the wrist]
> On 8/16/07, *Steve Holden* <steve at holdenweb.com 
> <mailto:steve at holdenweb.com>> wrote:
> 
>     Robert Dailey wrote:
>      > So immutable objects cannot be modified directly? I guess this means
>      > integers are immutable and the act of assigning to one is a
>     completely
>      > new definition?
> 
>     Correct. A new value is bound to the name or item on the left-hand side
>     - remember, all variables are pointers to values, there's no way to
>     replace the value of a variable because of the automatic dereferencing.
>     And yes, immutable objects can't be modified. At all, period. Hence the
>     name.
> 
>      >                 So if I were to create a class called Integer and
>     give
>      > it a .set() method, this would allow me to create mutable
>     integers, and
>      > thus passing in an object of type class Integer would allow me to
>     modify
>      > the value from inside the function?
>      >
>     Well, the .set() method wouldn't be called automatically on an
>     assignment statement but yes, if you passed an Integer object into your
>     function and called its .set() method from inside then it should work.
> 
>     As long as you get your mutable integer implementation correct, of
>     course ;-). I'd suggest delegating everything except the .set() method
>     to the underlying integer value.

 > Thanks Steve for your explanation. It was very helpful. I think I
 > understand it now. By the way, by the .set method I meant:
 >
 > class Integer:
 >     def __init__( self, number=0 ):
 >        self._int = number
 >
 >     def set( self, number ):
 >        self._int = number
 >
 >
 > # later on....
 >
 > mutableInt = Integer( 5 )
 > def change_me( var ):
 >     var.set( 6 )
 >
 >
 > Of course, I'd probably use overloaded operators in a more realized
 > example.
 >
 >
Fair enough, but I was trying to point out that assignment isn't an 
operator so you won't be able to achieve what you want by assignment to 
a name local to the function.

You could, of course, assign to a name local to the instance you passed 
in, but then there wouldn't be much point in using anything but a simple 
subclass of object (normally referred to as Bunch).

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From as at hut.at  Wed Aug 29 10:55:49 2007
From: as at hut.at (hyena)
Date: Wed, 29 Aug 2007 16:55:49 +0200
Subject: handling tabular data in python--newbie question
References: <6cf42$46d56771$839b8704$5034@news1.tudelft.nl>
Message-ID: <aa51b$46d588fa$839b8704$7718@news1.tudelft.nl>

Thanks Bruno and Steve for the quick answer!

>What make you think such a thing ?
I am also using R and java from time to time, and think it is very covinient 
that in R tables are handled as matrixs or data frames. Thus I expect python 
has something similiar. :)

And I went for Steve's first suggestion, which is just what I want at this 
moment.

Thanks again. 




From wolf_tracks at invalid.com  Sun Aug 19 18:47:38 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sun, 19 Aug 2007 22:47:38 GMT
Subject: Python on Computation, Math and Statistics
In-Reply-To: <5irldoF3qonnbU1@mid.uni-berlin.de>
References: <m_%xi.34088$2v1.7394@newssvr14.news.prodigy.net>
	<5irgvaF3oi5dpU2@mid.uni-berlin.de>
	<DU0yi.1286$Oo.199@newssvr17.news.prodigy.net>
	<5irldoF3qonnbU1@mid.uni-berlin.de>
Message-ID: <eM3yi.46928$Um6.27077@newssvr12.news.prodigy.net>

Thanks. I appreciate the info.

Diez B. Roggisch wrote:
> W. Watson schrieb:
>> Google? What's that? Thanks. I like to get a insider's view when I 
>> know experts are out there. So now I ask a deeper question. Are there 
>> matrix computation libraries or even statistical (regression, factor 
>> analysis) libraries?
> 
> That's your idea of an "in depth question"?
> 
> Did you even consider googling the projects I told you about? Reading up 
> on them just the tiniest?
> 
> http://www.scipy.org/
> 
> """
> SciPy (pronounced "Sigh Pie") is open-source software for mathematics, 
> science, and engineering. It is also the name of a very popular 
> conference on scientific programming with Python. The SciPy library 
> depends on NumPy, which provides convenient and fast N-dimensional array 
> manipulation. The SciPy library is built to work with NumPy arrays, and 
> provides many user-friendly and efficient numerical routines such as 
> routines for numerical integration and optimization. Together, they run 
> on all popular operating systems, are quick to install, and are free of 
> charge. NumPy and SciPy are easy to use, but powerful enough to be 
> depended upon by some of the world's leading scientists and engineers. 
> If you need to manipulate numbers on a computer and display or publish 
> the results, give SciPy a try!
> """
> 
> Or do you wish a comprehensive overview as Powerpoint presentation in 
> your favorite colors?
> 
> 
> 
> Diez

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From tundra at tundraware.com  Fri Aug 31 22:13:53 2007
From: tundra at tundraware.com (Tim Daneliuk)
Date: Fri, 31 Aug 2007 21:13:53 -0500
Subject: So what exactly is a complex number?
In-Reply-To: <46d89ba9$0$30380$9b4e6d93@newsspool4.arcor-online.net>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<46d89ba9$0$30380$9b4e6d93@newsspool4.arcor-online.net>
Message-ID: <qfumq4-2b61.ln1@ozzie.tundraware.com>

Wildemar Wildenburger wrote:
> Tim Daneliuk wrote:
>> A number by itself is called a "scalar".  For example, when I say,
>> "I have 23 apples", the "23" is a scalar that just represents an
>> amount in this case.
>>
>> One of the most common uses for Complex Numbers is in what are
>> called "vectors".  In a vector, you have both an amount and
>> a *direction*.  For example, I can say, "I threw 23 apples in the air
>> at a 45 degree angle".  Complex Numbers let us encode both
>> the magnitude (23) and the direction (45 degrees) as a "number".
>>
> 1. Thats the most creative use for complex numbers I've ever seen. Or 
> put differently: That's not what you would normally use complex numbers 
> for.
> 2. Just to confuse the issue: While complex numbers can be represented 
> as 2-dimensional vectors, they are usually considered scalars as well 
> (since they form a field just as real numbers do).
> 
> 
>> There are actually two ways to represent Complex Numbers.
>> One is called the "rectangular" form, the other the "polar"
>> form, but both do the same thing - they encode a vector.
>>
> Again, that is just one way to interpret them. Complex numbers are not 
> vectors (at least no moe than real numbers are).
> 
> 
> /W

Yeah, I know it's a simplification - perhaps even a vast simplification -
but one eats the elephant a bite at a time.  FWIW, the aforementioned
was my first entre' into complex arithmetic, long before I waded through
complex analysis and all the more esoteric stuff later in school.  I
wonder why you think it is "creative", though.  Most every engineer I've
ever know (myself included) was first exposed to complex numbers in much
this way.  Then again, I was never smart enough to be a pure mathematician ;)

-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From steveo at syslang.net  Fri Aug 24 12:26:13 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Fri, 24 Aug 2007 12:26:13 -0400 (EDT)
Subject: How to replace a method in an instance.
In-Reply-To: <1187971953.261328.219000@q3g2000prf.googlegroups.com>
References: <mailman.258.1187971369.32294.python-list@python.org>
	<1187971953.261328.219000@q3g2000prf.googlegroups.com>
Message-ID: <alpine.LFD.0.999.0708241223480.30194@saturn.syslang.net>

On Friday, Aug 24th 2007 at 09:12 -0700, quoth kyosohma at gmail.com:

=>On Aug 24, 11:02 am, "Steven W. Orr" <ste... at syslang.net> wrote:
=>> In the program below, I want this instance to end up calling repmeth
=>> whenever inst.m1 is called. As it is now, I get this error:
=>>
=>> Hello from init
=>> inst =  <__main__.CC instance at 0x402105ec>
=>> Traceback (most recent call last):
=>>    File "./foo9.py", line 17, in ?
=>>      inst.m1()
=>> TypeError: repmeth() takes exactly 1 argument (0 given)
=>>
=>> #! /usr/bin/python
=>> def repmeth( self ):
=>>      print "repmeth"
=>>
=>> class CC:
=>>      def __init__( self ):
=>>          self.m1 = repmeth
=>>          print 'Hello from init'
=>>
=>>      def m1 ( self ):
=>>          print "m1"
=>>
=>> inst = CC()
=>> inst.m1()

=>Remove "self" from repmeth as it's not required in a function, only in
=>functions that are defined within a class. Of course, a function in a
=>class is also know as a method.

Sorry. I need repmeth to have self passed to it automatically if it's 
called. I didn't mean to obfuscate the problem by not making a reference 
to self in repmeth. 

Am I being clear?

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From pavlovevidence at gmail.com  Thu Aug  2 21:54:13 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 03 Aug 2007 01:54:13 -0000
Subject: __call__ considered harmful or indispensable?
In-Reply-To: <7xfy31smuq.fsf@ruckus.brouhaha.com>
References: <mailman.1527.1186079415.22759.python-list@python.org>
	<7xfy31smuq.fsf@ruckus.brouhaha.com>
Message-ID: <1186106053.823905.285880@j4g2000prf.googlegroups.com>

On Aug 2, 4:27 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> s... at pobox.com writes:
> > In this particular case it was clearly unnecessary and just obfuscated the
> > code.  I'm wondering, are there some general cases where __call__ methods of
> > a user-defined class are simply indispensable?
>
> I don't know about "indispensable" but __call__ is convenient sometimes
> and I do use it.  I've wished that modules supported call, so I could
> say
>
>     import foo
>     x = foo(3)
>
> instead of having to say x=foo.foo(3) or something like that.

I used to think that.  Or, rather, I often thought that it'd be nice
if a function or class could be imported like a module.

These days I think it'd be enough if modules don't have the same name
as any (public) objects they define.  No more glob.glob,
select.select, or time.time.  It's ugly and potentially confusing.
And if I were Polynesian I would keep thinking I was seeing plurals.


Carl Banks



From mensanator at aol.com  Mon Aug 13 19:38:55 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Mon, 13 Aug 2007 16:38:55 -0700
Subject: (sort of) deterministic timing in Python
In-Reply-To: <1i2si8h.1qc8f77i68gyeN%johnmfisher@comcast.net>
References: <1i2si8h.1qc8f77i68gyeN%johnmfisher@comcast.net>
Message-ID: <1187048335.358956.111340@z24g2000prh.googlegroups.com>

On Aug 13, 5:16 pm, johnmfis... at comcast.net (John Fisher) wrote:
> I am working on a framework for data acquisition in Python 2.5, am
> trying to get a structure going more like this:
>
> mark start time
> start event
>         event finishes
> count time until next interval
> start second event...
>
> rather than this:
>
> start event
>         event finishes
> sleep for interval
> start second event
>
> Do you see the difference? I get a true fixed interval from the first,
> including the time to accomplish the event task(s). In the second case,
> the sleep just gets tacked on at the end of the events, not very
> deterministic (timing-wise).
>
> So how do I accomplish this in Python with a minimum of labour?
>
> Thanks for any light you can shed on my darkness...
>
> wave_man

In the first example, you know when to start the second interval,
right? In the second case, you are assuming the second task is
ready to run after the sleep interval.

Here's an example that times how long an external program takes,
the os.popen() returns to the Python script when the external
C program completes, so no need for any sleep interval.

Because of the poorly written factor program, some composites
are falsely reported as unfactorable. This example keeps
re-calling the factor!.exe program until all composites are
factored or marked intractable, and the time to execute each
iteration of factor!.exe is printed after each call.


import os
import time

factor_program = 'factor! -d200 '

the_composites =
[['COMPOSITE_FACTOR','50818429800343305993022114330311033271249313957919046352679206262204589342623811236647989889145173098650749']]

the_primes = []
the_intractables = []

phase = 1
the_times = []
while the_composites:
  print "="*40
  print 'Phase',phase
  the_comp = the_composites.pop(0)
  print the_comp
  print
  the_times.append(time.time())  # time how long it takes to run
factor!.exe
  the_output = os.popen(factor_program+the_comp[1]).readlines()
  the_times.append(time.time())
  new_factors = [i.split() for i in the_output]
  for i in new_factors: print i
  print
  if len(new_factors) == 1:
    # it's prime or intractable
    if new_factors[0][0] == 'PRIME_FACTOR':
      the_primes.append([new_factors[0][0],long(new_factors[0][1])])
    else:
      the_intractables.append([new_factors[0][0],long(new_factors[0]
[1])])
    new_factors.pop()
  while new_factors:
    j = new_factors.pop(0)
    if j[0] == 'PRIME_FACTOR':
      the_primes.append([j[0],long(j[1])])
    else:
      the_composites.append(j)
  print the_times[phase] - the_times[phase-1],'seconds'
  phase += 1

print "="*40
print
print 'Factoring complete'
print

the_primes.sort()
the_intractables.sort()
the_primes.extend(the_intractables)

for i in the_primes:
  print i[0],i[1]
print
print "="*40

##  ========================================
##  Phase 1
##  ['COMPOSITE_FACTOR',
'50818429800343305993022114330311033271249313957919046352679206262204589342623811236647989889145173098650749']
##
##  ['PRIME_FACTOR', '37']
##  ['PRIME_FACTOR', '43']
##  ['PRIME_FACTOR', '167']
##  ['COMPOSITE_FACTOR', '507787751']
##  ['PRIME_FACTOR', '69847']
##  ['PRIME_FACTOR', '30697']
##  ['PRIME_FACTOR', '89017']
##  ['PRIME_FACTOR', '3478697']
##  ['PRIME_FACTOR', '434593']
##  ['PRIME_FACTOR', '49998841']
##  ['PRIME_FACTOR', '161610704597143']
##  ['PRIME_FACTOR', '14064370273']
##  ['COMPOSITE_FACTOR', '963039394703598565337297']
##  ['PRIME_FACTOR', '11927295803']
##
##  0.860000133514 seconds
##  ========================================
##  Phase 2
##  ['COMPOSITE_FACTOR', '507787751']
##
##  ['PRIME_FACTOR', '29819']
##  ['PRIME_FACTOR', '17029']
##
##  0.0780000686646 seconds
##  ========================================
##  Phase 3
##  ['COMPOSITE_FACTOR', '963039394703598565337297']
##
##  ['PRIME_FACTOR', '518069464441']
##  ['PRIME_FACTOR', '1858900129817']
##
##  0.0469999313354 seconds
##  ========================================
##
##  Factoring complete
##
##  PRIME_FACTOR 37
##  PRIME_FACTOR 43
##  PRIME_FACTOR 167
##  PRIME_FACTOR 17029
##  PRIME_FACTOR 29819
##  PRIME_FACTOR 30697
##  PRIME_FACTOR 69847
##  PRIME_FACTOR 89017
##  PRIME_FACTOR 434593
##  PRIME_FACTOR 3478697
##  PRIME_FACTOR 49998841
##  PRIME_FACTOR 11927295803
##  PRIME_FACTOR 14064370273
##  PRIME_FACTOR 518069464441
##  PRIME_FACTOR 1858900129817
##  PRIME_FACTOR 161610704597143
##
##  ========================================



From aleax at mac.com  Thu Aug  2 01:29:30 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 1 Aug 2007 22:29:30 -0700
Subject: Where do they tech Python officialy ?
References: <1185209574.045112.163780@g4g2000hsf.googlegroups.com>
	<7xveca4ajp.fsf@ruckus.brouhaha.com>
	<1185265091.276958.239910@r34g2000hsd.googlegroups.com>
	<1i23wyk.avc945i4dwsiN%aleax@mac.com>
	<mailman.1423.1185957645.22759.python-list@python.org>
	<1i25pjo.1mo5uqc1yxqsjkN%aleax@mac.com>
	<mailman.1471.1186012676.22759.python-list@python.org>
Message-ID: <1i26u6o.pthuan2j7nufN%aleax@mac.com>

Alex Popescu <nospam.themindstorm at gmail.com> wrote:
   ...
> Have you seen/heard of Jim lately? Cause I haven't. By the time he was
> the lead of the AspectJ team his charismatic presence was everywhere (at
> least around that project).

He wasn't at OSCON this year, but I hope to see him at Pycon next year.
I don't see this as a deep dark M$ plot to kidnap and hide the best and
brightest Open Sourcers, because I know what it means to get a wonderful
challenging new job and pour all you have into it (I've had to skip a
couple Pycons, myself, though I hope to be back next year).


> However I do agree with you. The only remark is that US trends are not
> hitting my part of Eu so quickly ;-) (things are indeed changing).

About 3 years ago I was also getting sick and tired about my own part of
the EU, which is part of why I emigrated:-).  I do see things getting
better in Southern Europe, albeit from a distance.


> > These are the ones you don't wan't to work for anyway !-)
> 
> Well... this is sometimes debatable :-).

A totally clueless employer may still be a way to make some quick and
dirty money right now, but it will barely be enough to pay for the extra
Maalox and Zantac you'll need.  Looking back on your life when you're
closer to retirement than to when you started working, you'll see what a
mistake it was to accept clueless-employers' offers, and how much
happier your life would have been if you'd known that up front:-).


Alex


From python-url at phaseit.net  Mon Aug 13 07:19:11 2007
From: python-url at phaseit.net (Gabriel Genellina)
Date: Mon, 13 Aug 2007 11:19:11 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (Aug 13)
Message-ID: <f9penf$jhg$1@lairds.us>

QOTW:  "The first time you see twenty tons of machinery move unexpectedly
because you inadvertently changed one bit in memory, you become very 
conservative about your software platform." - Walt Leipold

"Making use of the available wrappers for current Tk libraries such as
BWidgets, Tile, Tablelist, TkTreeCtrl, and so on allows you to make UI's
every bit as polished as what comes with wxPython ..." - Kevin Walzer


    Looking for the best programs written entirely in
    Python:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/9fea4deb4c70fef1/
    
    `a==b` vs. `a is b` revisited, with some advice on
    when to use one test or another:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/4a087153826f1f2b/
    
    Pros and cons of "desktop web" applications vs. native
    GUIs: 
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/1f823a9c8a41c8bb/50c2f4bc10621f9a?rnum=1#50c2f4bc10621f9a
    started as
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/1f823a9c8a41c8bb
    
    When is OK to use __del__?
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/b09e02b7c67c8a3b/
    
    Leipzig is the site of the second "Python im deutschsprachigen
    Raum 2007".  Among the presentations likely to reward both novices
    and experienced Pythoneers are ones on Web applications, use of
    Python in science, developer tools in Python, and Python for
    simulations in aerospace.   
        http://www.python-academy.de/workshop/index.html                                
    Somewhat related to previous topic: how to ensure a
    generator object is closed in Python 2.4?
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/3f789096bded17e7/
    
    Discussing Python threading model, the GIL, Stackless,
    and possible future alternatives:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/bbeb8b826af93ae/
    
    "Use spaces for space and use tabs for tables": A
    Python song, by James Stroud
        http://groups.google.com/group/comp.lang.python/msg/9743131cf0c426eb
    
    
========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance.
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".  Write to the same address to unsubscribe.


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From wolf_tracks at invalid.com  Sun Aug 19 14:29:38 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sun, 19 Aug 2007 18:29:38 GMT
Subject: Python on Computation, Math and Statistics
Message-ID: <m_%xi.34088$2v1.7394@newssvr14.news.prodigy.net>

I would hope Python is doing a lot of standard computations beyond 
arithmetic. Trig functions and more. Comments?
-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From ramashish.lists at gmail.com  Sun Aug 19 01:03:38 2007
From: ramashish.lists at gmail.com (Ramashish Baranwal)
Date: Sun, 19 Aug 2007 05:03:38 -0000
Subject: Understanding closures
Message-ID: <1187499818.125192.12930@m37g2000prh.googlegroups.com>

Hi,

I want to use variables passed to a function in an inner defined
function. Something like-

def fun1(method=None):
    def fun2():
        if not method: method = 'GET'
        print '%s: this is fun2' % method
        return
    fun2()

fun1()

However I get this error-
UnboundLocalError: local variable 'method' referenced before
assignment

This however works fine.

def fun1(method=None):
    if not method: method = 'GET'
    def fun2():
        print '%s: this is fun2' % method
        return
    fun2()

fun1()

Is there a simple way I can pass on the variables passed to the outer
function to the inner one without having to use or refer them in the
outer function?

Thanks,
Ramashish



From rcdailey at gmail.com  Mon Aug 13 10:35:28 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 13 Aug 2007 09:35:28 -0500
Subject: Binary, Hex, and Decimal string conversions
In-Reply-To: <20070813034138.CA4C81E4012@bag.python.org>
References: <496954360708111559s1cef4212pabd14e95b27435ea@mail.gmail.com>
	<C5FFAC23-F5DC-4112-A508-EC9BDF2FAB43@jedimindworks.com>
	<496954360708121620r4dd68ac9o430326ae8c8ae04d@mail.gmail.com>
	<649D1D6C-A44C-4D03-920D-489BBD108789@jedimindworks.com>
	<20070813034138.CA4C81E4012@bag.python.org>
Message-ID: <496954360708130735s73a0fb02mbba68dad14f59193@mail.gmail.com>

Just curious Dick, why are you making your own to_base method? Doesn't the
source I provided in my earlier email give you all that you need? I was
hoping my source might be useful to a few people, even though it's pretty
trivial code.

On 8/12/07, Dick Moores <rdm at rcblue.com> wrote:
>
> At 07:04 PM 8/12/2007, Michael Bentley wrote:
>
> >On Aug 12, 2007, at 6:28 PM, Dick Moores wrote:
> >
> >>n = 12
> >>base = 36
> >>print to_base(n, base)
> >>==========================================
> >>This seems to work fine for n >= base, but not for n < base. For
> >>example, the code shown returns "c". Is my indentation wrong, or
> >>the code? It seems to me that the code should work for the general
> >>case, not just for n >= base.
> >
> >Isn't 'c' the correct answer?
>
> Yes, of course. Stupid of me.
>
> Dick
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From aboudouvas at panafonet.gr  Fri Aug  3 18:03:49 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Fri, 03 Aug 2007 15:03:49 -0700
Subject: Eclipse/PyDev question.
In-Reply-To: <mailman.1570.1186156030.22759.python-list@python.org>
References: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>
	<1186153259.372809.230110@d30g2000prg.googlegroups.com>
	<1186153503.806195.225560@g4g2000hsf.googlegroups.com>
	<bfc796de0708030832m16ac29a8se60f84f45cd50bf@mail.gmail.com>
	<mailman.1570.1186156030.22759.python-list@python.org>
Message-ID: <1186178629.918590.117540@19g2000hsx.googlegroups.com>

On Aug 3, 5:46 pm, "Danyelle Gragsone" <ladyni... at gmail.com> wrote:
> I wonder how long before they come out with a python version of
> eclipse.  I know there is a C/C++ now.
>
> Danyelle

The only problem i see in Eclipse/Pydev solution is that Eclipse is
bulky...I was not designed for specific Python usage and because of
that we have a lot of stuff that does not concern us. I started to
look at Eric4 and i must way i like it a lot. I am not sure if i
switch yet but it seems very nice.



From pyth0nc0d3r at gmail.com  Thu Aug 30 21:11:14 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Thu, 30 Aug 2007 20:11:14 -0500
Subject: So what exactly is a complex number?
Message-ID: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>

Like in math where you put letters that represent numbers for place holders
to try to find the answer type complex numbers?
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From gh at ghaering.de  Thu Aug 30 18:29:21 2007
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Fri, 31 Aug 2007 00:29:21 +0200
Subject: python + gcov
In-Reply-To: <1188472743.570376.120390@o80g2000hse.googlegroups.com>
References: <1188404571.590476.265840@r34g2000hsd.googlegroups.com>
	<1188472743.570376.120390@o80g2000hse.googlegroups.com>
Message-ID: <fb7g94$cjo$1@sea.gmane.org>

labrach at gmail.com wrote:
> [...] Do I need to make a static extension of my imported module to profile
> it ?

I always bit the bullet and finally just did that.

-- Gerhard



From tjreedy at udel.edu  Thu Aug  9 11:57:57 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 9 Aug 2007 11:57:57 -0400
Subject: Stackless Integration
References: <1186650027.043779.276520@i38g2000prf.googlegroups.com>
Message-ID: <f9fdi5$r4f$1@sea.gmane.org>


"Justin T." <jmtulloss at gmail.com> wrote in message 
news:1186650027.043779.276520 at i38g2000prf.googlegroups.com...
| I've been looking at stackless python a little bit, and it's awesome.
| My question is, why hasn't it been integrated into the upstream python
| tree? Does it cause problems with the current C-extensions? It seems
| like if something is fully compatible and better, then it would be
| adopted. However, it hasn't been in what appears to be 7 years of
| existence, so I assume there's a reason.

First, which 'stackless'?  The original continuation-stackless (of about 7 
years ago)?  Or the more current tasklet-stackless (which I think is much 
younger than that)?

The original added a feature Guido did not want (continuations) and 
required major changes to the core that would have make maintainance 
probably more difficult for most of the developers, including GvR.  For 
more, see
http://www.python.org/dev/peps/pep-0219/

Second, what do you mean by integration?  The current tasklet version is, I 
am sure, as well integrated as Tismer can make it.  Last I looked, there 
were warnings about possible incompatibilities, but perhaps these have been 
overcome.  It is just not part of the stdlib.  And as far as I know or 
could find in the PEP index, C. Tismer has never submitted a PEP asking 
that it be made so.  Doing so would mean a loss of control, so there is a 
downside as well as the obvious upside of distribution.

tjr





From fartknuckle at fartknuckle.com  Fri Aug 10 19:23:11 2007
From: fartknuckle at fartknuckle.com (fartknuckle)
Date: Fri, 10 Aug 2007 18:23:11 -0500
Subject: Error calling module
Message-ID: <pan.2007.08.10.23.23.11.116698@fartknuckle.com>


When I try to call gtk like so:


import gtk

I get the error:

ImportError: No module named gtk


I installed a new Python and a new pygtk.
Is the gtk module not a part of pygtk???

I have PYTHONPATH=/usr/local/lib/python2.5/site-packages
set. So what am I doing wrong?

Thanks

-- 
Take summa dis punk!


From lesande at gmail.com  Thu Aug  9 18:11:40 2007
From: lesande at gmail.com (Lee Sander)
Date: Thu, 09 Aug 2007 15:11:40 -0700
Subject: programmatically define a new variable on the fly
Message-ID: <1186697500.024593.303820@x35g2000prf.googlegroups.com>

Hi,

I would like to define a new variable which is not predefined by me.
For example,
I want to create an array called "X%s" where "%s" is to be determined
based on the data I am processing. So, for example, if I the file
I'm reading has
g 99
on the first line, I want to create a new variable  called "Xg" whose
length
is 99.
I tried eval("Xg=[0]*99") but that did not work.

any help would be greatly appreciated
Lee



From iansan at gmail.com  Thu Aug 30 13:32:58 2007
From: iansan at gmail.com (IamIan)
Date: Thu, 30 Aug 2007 17:32:58 -0000
Subject: Simple elementtree question
Message-ID: <1188495178.701968.246690@50g2000hsm.googlegroups.com>

This is in Python 2.3.5. I've had success with elementtree and other
RSS feeds, but I can't get it to work with this format:

<?xml version="1.0"?><rdf:RDF
 xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
 xmlns:dc="http://purl.org/dc/elements/1.1/"
 xmlns:fr="http://ASPRSS.com/fr.html"
 xmlns:pa="http://ASPRSS.com/pa.html"
 xmlns="http://purl.org/rss/1.0/">
<channel rdf:about="http://www.sample.com">
<title>Example feed</title>
<link>http://www.sample.com</link>
<description>Sample News Agency - News Feed</description>
<image rdf:resource="http://www.sample.com/img/new.gif" />
<items>
<rdf:Seq>
<rdf:li rdf:resource="http://www.sample.com/news/20000/news.htm" />
<rdf:li rdf:resource="http://www.sample.com/news/20001/news.htm" />
</rdf:Seq>
</items>
</channel><image rdf:about="http://www.sample.com/img/about.gif">
<title>Our News Feed</title>
<url>http://www.sample.com/img/title.gif</url>
<link>http://www.sample.com</link>
</image>
<item rdf:about="http://www.sample.com/news/20000/
news.htm"><title>First story</title>
<description>30 August, 2007 : - - First description including unicode
characters</description>
<link>http://www.sample.com/news/20000/news.htm</link>
</item>
<item rdf:about="http://www.sample.com/news/20001/
news.htm"><title>Second story</title>
<description>30 August, 2007 : - - Second description including
unicode characters</description>
<link>http://www.sample.com/news/20001/news.htm</link>
</item>
</rdf:RDF>

What I want to extract is the text in the title and link tags for each
item (eg. <title>First story</title> and <link>http://www.sample.com/
news/20000/news.htm</link>). Starting with the title, my test script
is:

import sys
from urllib import urlopen

sys.path.append("/home/me/lib/python")
import elementtree.ElementTree as ET

news = urlopen("http://www.sample.com/rss/rss.xml")
nTree = ET.parse(news)
for item in nTree.getiterator("title"):
  print item.text

Whether I try this for title or link, nothing is printed. There are
also unicode characters in the <title> tags, I'm not sure if that
could affect the output like this. In case it did I passed an encoding
argument to ET.parse (which I'd seen in other posts) but it said
encoding was an unexpected argument...

Printing all subelements does work:
print nTree.getiterator()

[<Element {http://www.w3.org/1999/02/22-rdf-syntax-ns#}RDF at
40436d2c>,
<Element {http://purl.org/rss/1.0/}channel at 40436b2c>,
<Element {http://purl.org/rss/ 1.0/}title at 40436dcc>,
<Element {http://purl.org/rss/1.0/}link at 40436d6c>,
< Element {http://purl.org/rss/1.0/}description at 40436e0c>,
<Element {http://pur l.org/rss/1.0/}image at 40436e6c>,
<Element {http://purl.org/rss/1.0/}items at 4 0436f2c>, <Element
{http://www.w3.org/1999/02/22-rdf-syntax-ns#}Seq at 40436f6c> ,
<Element {http://www.w3.org/1999/02/22-rdf-syntax-ns#}li at
40436f0c>,
<Element {http://www.w3.org/1999/02/22-rdf-syntax-ns#}li at
40436fec>,
<Element {http://purl.org/rss /1.0/}item at 4044624c>,
<Element {http://purl.org/rss/1.0/}title at 4044626c>,
<Element {http://purl.org/rss/1.0/}description at 4044614c>,
<Element {http://purl.org/rss/1.0/}link at 4044630c>,
<Element {http://purl.org/rss/1.0/}item at 40 4463ac>,
<Element {http://purl.org/rss/1.0/}title at 404463cc>,
<Element {http:/ /purl.org/rss/1.0/}description at 404462ac>,
<Element {http://purl.org/rss/1.0/} link at 4044640c>]

Any ideas are greatly appreciated.



From gregpinero at gmail.com  Sat Aug  4 17:52:16 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Sat, 04 Aug 2007 21:52:16 -0000
Subject: Best way to capture output from an exec'ed (or such) script?
In-Reply-To: <1186154066.529360.90260@q75g2000hsh.googlegroups.com>
References: <1186084086.212050.264270@q3g2000prf.googlegroups.com>
	<mailman.1547.1186097565.22759.python-list@python.org>
	<1186154066.529360.90260@q75g2000hsh.googlegroups.com>
Message-ID: <1186264336.502429.232840@r34g2000hsd.googlegroups.com>

On Aug 3, 11:14 am, "gregpin... at gmail.com" <gregpin... at gmail.com>
wrote:
> On Aug 2, 7:32 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:> If your web server is multithreaded (or you use some other way to process
> > many simultaneous requests) you have to be more careful - remember that
> > sys.stdout is global, you must find a way to distinguish between output
> >  from different processes all going into the same collector.
>
> Any ideas on how to do this?  Is it even possible?
>
> -Greg

I'm actually worried about this now.  Does anyone know of any
potential solutions?  Anything to at least get me started?

-Greg



From horpner at yahoo.com  Wed Aug  8 16:22:04 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 08 Aug 2007 20:22:04 GMT
Subject: Misleading wikipedia article on Python 3?
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
	<eICti.37400$G23.15165@newsreading01.news.tds.net>
	<41Dti.37401$G23.10727@newsreading01.news.tds.net>
	<1186582066.096793.14700@57g2000hsv.googlegroups.com>
	<slrnfbk05n.20o.horpner@FIAD06.norwich.edu>
	<1186600271.858692.182090@22g2000hsm.googlegroups.com>
	<7xmyx1bxkf.fsf@ruckus.brouhaha.com>
Message-ID: <MBpui.37519$G23.36050@newsreading01.news.tds.net>

On 2007-08-08, Paul Rubin <http> wrote:
> Istvan Albert <istvan.albert at gmail.com> writes:
>>   apply(), callable(), coerce(), file(), reduce(), reload()
>
> reduce() is really gone?????  Maybe itertools can get an
> ireduce function or something like that?

I don't see how file() can be "removed", actually, unless the
file type itself is getting axed.

-- 
Neil Cerutti


From arkanes at gmail.com  Thu Aug 30 13:17:17 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 30 Aug 2007 12:17:17 -0500
Subject: Python threading
In-Reply-To: <1188492781.894079.153260@r23g2000prd.googlegroups.com>
References: <1188492781.894079.153260@r23g2000prd.googlegroups.com>
Message-ID: <4866bea60708301017s53bfb9a2g9652b8e7899363c4@mail.gmail.com>

On 8/30/07, Robert.R.Emmel at gmail.com <Robert.R.Emmel at gmail.com> wrote:
> Hello,
>
> I am using the threading module and the Queue module in python to to
> send out shipment tracking URL requests.
>
> Is there a way to timeout a thread within a Queue?
>
> I think the way I have it now the thread will wait until something is
> returned and will basically wait forever for that something.
>
> Between the waiting for something to be returned and the timeouts on
> the database connections, the program appears to just hang like it has
> stopped working. Any suggestions?
>
> Here is a sample of code I am using (left out some of the code for
> brevity):
>

<code snipped>

The two possible implementations:

a) Use a timeout in your get() call to allow to check for thread termination
b) push a sentinel object into the Queue that means "please exit now".


From ed at leafe.com  Fri Aug 24 11:08:45 2007
From: ed at leafe.com (Ed Leafe)
Date: Fri, 24 Aug 2007 11:08:45 -0400
Subject: creating a tar file with python
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE2EE@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
	<faktv8$8fs$1@sea.gmane.org>
	<93066C069973ED448DC2BCEA9C44A7383BE2ED@efmailx>
	<46CE4D3D.7020106@holdenweb.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2EE@efmailx>
Message-ID: <B925F95D-D8B0-4820-B4BB-0D189226684F@leafe.com>

On Aug 23, 2007, at 11:27 PM, Brian McCann wrote:

> I ran the code as you suggested, didn't work, tried variations of  
> it didn't work,
> If you don't know the answer don't pretend you do!
>
> Apology not accepted, please don't wake up!
>
> Future correspondence on any python questions from you go to trash.
> May your pillow not have pity on your head!

	What a tool.

	Add another to the twit filter...

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com




From arkanes at gmail.com  Thu Aug 30 19:50:59 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 30 Aug 2007 18:50:59 -0500
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188517050.174081.265900@x40g2000prg.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<1188430887.481586.106760@l22g2000prc.googlegroups.com>
	<mailman.159.1188499976.28954.python-list@python.org>
	<1188504811.019632.186580@x35g2000prf.googlegroups.com>
	<46d75116$0$401$426a74cc@news.free.fr>
	<1188517050.174081.265900@x40g2000prg.googlegroups.com>
Message-ID: <4866bea60708301650n639db1d3v3be9c31c0bbec3ab@mail.gmail.com>

On 8/30/07, Russ <uymqlp502 at sneakemail.com> wrote:
>
> Bruno Desthuilliers wrote:
> > Russ a ?crit :
> > (snip)
> >
> > > I don't see how you can avoid adding some new syntax, given that
> > > Python does not
> > > currently have syntax for specifying invariants and pre- and post-
> > > conditions.
> >
> > class Parrot(object):
> >    @pre(lambda x : x != 42)
> >    @post(lambda result: result != 42)
> >    @invariant(lambda self: self.x == 42)
> >    def reliable_method(self, x):
> >      # your code here
> >      return something
>
> That looks like new syntax to me. Did I miss your point?
>
> I have no strong leaning about what the exact syntax should be for
> programming by contract.
> The syntax you show above seems reasonable, except that I am not sure
> about requiring
> that everything be put inside parentheses. That seems a bit confining
> for more complex
> conditions.
>

This is existing, working python syntax (although the decorators would
need to be defined).

> --
> http://mail.python.org/mailman/listinfo/python-list
>


From bignose+hates-spam at benfinney.id.au  Thu Aug 30 04:02:15 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 30 Aug 2007 18:02:15 +1000
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
Message-ID: <878x7te9h4.fsf@benfinney.id.au>

Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> writes:

> What's with using your brain instead of whining ?

Now now, no need for snappiness. If you don't feel a constructive
response is merited, please ignore.

-- 
 \       "A lot of people are afraid of heights. Not me, I'm afraid of |
  `\                                        widths."  -- Steven Wright |
_o__)                                                                  |
Ben Finney


From kst-u at mib.org  Thu Aug 30 21:57:13 2007
From: kst-u at mib.org (Keith Thompson)
Date: Thu, 30 Aug 2007 18:57:13 -0700
Subject: Important Research Project
References: <13ddcvm1bsu3s94@corp.supernews.com> <46D6CA0E.E66ED5C8@yahoo.com>
	<13deq9nj9atft62@corp.supernews.com>
Message-ID: <lnsl60o492.fsf@nuthaus.mib.org>

"E.D.G." <edgrsprj at ix.netcom.com> writes:
> "CBFalconer" <cbfalconer at yahoo.com> wrote in message
> news:46D6CA0E.E66ED5C8 at yahoo.com...
>> "E.D.G." wrote:
>
>> Where is Perl described in the C standard?  This seems rather OT.
>
> It has been my experience that a person who is an expert with one computer
> language can usually do reasonably well when working with other languages.
> I am trying to find some people who can assist with getting a Perl program
> running.  It would probably be easier for expert programmers in any language
> to help with this type of work compared with people such as myself who are
> not experts in any programming language.

CBFalconer's point is that this newsgroup (comp.lang.c, where he and I
are both reading this) is for discussion of the C programming
language.  If you want to discuss something other than C, please find
another forum.  Massive cross-posts like this are rarely appropriate.

-- 
Keith Thompson (The_Other_Keith) kst-u at mib.org  <http://www.ghoti.net/~kst>
San Diego Supercomputer Center             <*>  <http://users.sdsc.edu/~kst>
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Aug 11 17:46:05 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 11 Aug 2007 23:46:05 +0200
Subject: The Future of Python Threading
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<5i329uF3muir4U1@mid.individual.net>
	<slrnfbou9k.vkb.nick@irishsea.home.craig-wood.com>
	<5i45luF3mvdesU1@mid.individual.net>
	<slrnfbrg68.dpo.nick@irishsea.home.craig-wood.com>
Message-ID: <5i6p0tF3mr9f4U4@mid.individual.net>

Nick Craig-Wood wrote:
> Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com>

>>  So, how much performance gain would you get? Again, managing
>>  fine-grained locking can be much more work than one simple lock.
> 
> Assuming that you are not IO bound, but compute bound and that
> compute is being done in python then you'll get a speed up
> proportional to how many processors you have, minus a small amount
> for locking overhead.

Assuming this: Agreed.
 
Regards,


Bj?rn

-- 
BOFH excuse #348:

We're on Token Ring, and it looks like the token got loose.



From bignose+hates-spam at benfinney.id.au  Sat Aug  4 19:17:14 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 05 Aug 2007 09:17:14 +1000
Subject: sqlite3 create table col width?
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<1186240708.874804.271030@b79g2000hse.googlegroups.com>
	<1186245190.970687.307920@k79g2000hse.googlegroups.com>
	<mailman.1620.1186249934.22759.python-list@python.org>
Message-ID: <87r6miao05.fsf@benfinney.id.au>

jim-on-linux <inq1ltd at inqvista.com> writes:

> PY help,
> 
> Using sqlite3 v3.1.3

You made this message a reply to an existing discussion, so your
message is now part of that existing discussion. Please start a new
discussion thread by composing a new message.

-- 
 \         "True greatness is measured by how much freedom you give to |
  `\      others, not by how much you can coerce others to do what you |
_o__)                                             want."  --Larry Wall |
Ben Finney


From fabioztessitore at libero.it  Thu Aug  2 05:12:04 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 02 Aug 2007 09:12:04 GMT
Subject: Error with Tkinter and tkMessageBox
References: <46af71b7$0$10619$4fafbaef@reader2.news.tin.it>
	<mailman.1481.1186027758.22759.python-list@python.org>
	<46b19caa$0$17951$4fafbaef@reader1.news.tin.it>
Message-ID: <46b19fe4$0$17952$4fafbaef@reader1.news.tin.it>

I've tried to use Twm and SURPRISE! it works!!!

Can you say why? How can I fix the prob with Gnome?

Thanks


From draghuram at gmail.com  Tue Aug 28 14:40:45 2007
From: draghuram at gmail.com (draghuram at gmail.com)
Date: Tue, 28 Aug 2007 18:40:45 -0000
Subject: tempfile.mkstemp and os.fdopen
In-Reply-To: <1188323759.955043.317630@19g2000hsx.googlegroups.com>
References: <1188323759.955043.317630@19g2000hsx.googlegroups.com>
Message-ID: <1188326445.329622.307880@q5g2000prf.googlegroups.com>

On Aug 28, 1:55 pm, billiejoex <gne... at gmail.com> wrote:

> In conjunction I used os.fdopen() to get a wrapper around file
> properties (write & read methods, and so on...) but 'name' attribute
> does not contain the correct file name. Why?
>
> >>> import os
> >>> import tempfile
> >>> fileno, name = tempfile.mkstemp(prefix='ftpd.', dir=os.getcwd())
> >>> fd = os.fdopen(fileno, 'wb')
> >>> fd.name
>
> <fdopen>
>
> Moreover, I'd like to know if I'm doing fine. Does this approach avoid
> race conditions or other types of security problems?
>
> Thanks in advance

There seems to be a feature request for this:

http://bugs.python.org/issue1625576






From pablo.mitchell at gmail.com  Thu Aug  2 21:20:49 2007
From: pablo.mitchell at gmail.com (pablo.mitchell at gmail.com)
Date: Thu, 02 Aug 2007 18:20:49 -0700
Subject: Efficient Rank Ordering of Nested Lists
Message-ID: <1186104049.022836.253470@e9g2000prf.googlegroups.com>

A naive approach to rank ordering (handling ties as well) of nested
lists may be accomplished via:

   def rankLists(nestedList):
      def rankList(singleList):
          sortedList = list(singleList)
          sortedList.sort()
          return map(sortedList.index, singleList)
      return map(rankList, nestedList)

   >>> unranked = [ [ 1, 2, 3, 4, 5 ], [ 3, 1, 5, 2, 4 ], [ -1.1, 2.2,
0, -1.1, 13 ] ]
   >>> print rankLists(unranked)

   [[0, 1, 2, 3, 4], [2, 0, 4, 1, 3], [0, 3, 2, 0, 4]]

This works nicely when the dimensions of the nested list are small.
It is slow when they are big.  Can someone suggest a clever way to
speed it up?



From ivlenin at gmail.com  Wed Aug 22 01:31:57 2007
From: ivlenin at gmail.com (I V)
Date: Wed, 22 Aug 2007 05:31:57 GMT
Subject: IDE for Python
References: <mailman.55.1187690455.32294.python-list@python.org>
	<1187698999.545439.322600@k79g2000hse.googlegroups.com>
	<mailman.91.1187742207.32294.python-list@python.org>
Message-ID: <hTPyi.4052$Oo.2475@newssvr17.news.prodigy.net>

On Tue, 21 Aug 2007 21:23:25 -0300, Ricardo Ar?oz wrote:
> 	Do you know if for in-house development a GPL license applies? (Qt4
> and/or Eric4).

(I'm not sure if I've understood your question right)

If you distribute an app that _uses_ PyQT, you have to comply with the GPL
(or buy a license from Trolltech), but note that this doesn't really have
anything to do with Eric4. Running Eric4 doesn't require a license (either
the GPL or Trolltech), and code you write using Eric4 doesn't have to be
licensed according to the GPL either.


From mail at microcorp.co.za  Tue Aug 14 10:30:55 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 14 Aug 2007 16:30:55 +0200
Subject: (sort of) deterministic timing in Python
References: <1i2si8h.1qc8f77i68gyeN%johnmfisher@comcast.net>
Message-ID: <01f201c7de7f$d6e9ae00$03000080@hendrik>

"John Fisher" <jo.....cast.net> wrote:

import time
period_time = TIME_CONSTANT  # The time of a period in seconds - 0.001 is a
millisec

>mark start time

start_time = time.time()

>start event
>        event finishes

event_time = time.time() - start_time
wait_time = period_time-event_time

>count time until next interval

if wait_time > 0:
    time.sleep(wait_time)

>start second event?

that should (sort of) do it.

HTH - Hendrik




From steve at holdenweb.com  Wed Aug 15 12:12:31 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 15 Aug 2007 12:12:31 -0400
Subject: Guitar Reviews
In-Reply-To: <1187181739.853467.94630@r34g2000hsd.googlegroups.com>
References: <1187181172.442413.193040@57g2000hsv.googlegroups.com>
	<1187181739.853467.94630@r34g2000hsd.googlegroups.com>
Message-ID: <f9v8l8$rsr$1@sea.gmane.org>

Dustan wrote:
> On Aug 15, 7:32 am, cve... at gmail.com wrote:
> <snip>
> 
>>>> op.mother.speak()
> Congratulations! You've just given your email address to millions of
> people across Usenet!
> What do you have to say for yourself?

Probably something along the lines of "that's OK, it's disposable so I 
don't care who knows it".

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From sjmachin at lexicon.net  Mon Aug  6 19:04:32 2007
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 06 Aug 2007 16:04:32 -0700
Subject: xlrd question
In-Reply-To: <mailman.1596.1186188547.22759.python-list@python.org>
References: <mailman.1596.1186188547.22759.python-list@python.org>
Message-ID: <1186441472.515556.27840@m37g2000prh.googlegroups.com>

On Aug 4, 10:48 am, JYOUN... at kc.rr.com wrote:
> I ran your code which gave me this:
>
> >>> import sys, xlrd; print sys.version; print xlrd.__file__
>
> 2.3.5 (#1, Jan 30 2006, 13:30:29)
> [GCC 3.3 20030304 (Apple Computer, Inc. build 1819)]
> /System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/
> xlrd/__init__.pyc
>
> and as far as I can tell, the runxlrd.py file is located here (where I had drug this folder
> originally):
>
> Macintosh HD/xlrd-0.6.1/scripts/runxlrd.py
>
> So if I'm understanding this correctly, xlrd only uses the folder you download (xlrd-0.6.1)
> and then moves the
> '__init__.pyc' file to the location mentioned above?

Try actually *looking* in "the location mentioned above". Try actually
*looking* in the download folder -- do you see a file called
__init__.pyc? If you do, check the creation timestamp :-)

>
> There's definitely no problems or concerns.  :-)    I'm doing a bit of research to see if this
> might be something I
> use down the road at work.  Our I/T department is extremely strict as to what we put on
> employees machines
> so I want to have a good understanding as to where files are installed so I can let i/T know all
> the details.

I would have thought that: (1) If your company already uses Python,
the IT dept should have already come to grips with installing third-
party packages, and shouldn't need your help to find out where a
package's files are installed. (2) If they don't already use Python,
where a packages's files are installed is a minor fraction of the
concerns that would need to be overcome. (3) It might be a good idea
to ask informally what would be required to get a particular package
made available.



From programmer.py at gmail.com  Tue Aug 14 12:37:53 2007
From: programmer.py at gmail.com (programmer.py at gmail.com)
Date: Tue, 14 Aug 2007 16:37:53 -0000
Subject: Simple python iteration question
In-Reply-To: <1i2ulxb.179bf9ppsie5uN%raims@dot.com>
References: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
	<1i2ulxb.179bf9ppsie5uN%raims@dot.com>
Message-ID: <1187109473.796762.159800@g4g2000hsf.googlegroups.com>

On Aug 14, 11:27 am, ra... at dot.com (Lawrence Oluyede) wrote:
> Bryan <b... at bcc.com> wrote:
> > How do I do this?
>
> for i, item in enumerate(l):
>     print i, item
>

^^ That is the `most-correct` answer.  But because you're new, I'll
take this time to introduce you to help(), just in case you're too
lazy to RTFM (like me ;)).  help works on objects, and things you may
not expect  - try help(2).  Oh and welcome to `fun` programming!

>>> help(enumerate)

class enumerate(object)
 |  enumerate(iterable) -> iterator for index, value of iterable
 |
 |  Return an enumerate object.  iterable must be an other object that
supports
 |  iteration.  The enumerate object yields pairs containing a count
(from
 |  zero) and a value yielded by the iterable argument.  enumerate is
useful
 |  for obtaining an indexed list: (0, seq[0]), (1, seq[1]), (2,
seq[2]), ...

.. and a bunch of stuff I clipped ...

hth,
jw



From kw at codebykevin.com  Wed Aug  8 14:22:32 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Wed, 08 Aug 2007 14:22:32 -0400
Subject: Tkinter or wxpython?
In-Reply-To: <mailman.1757.1186592594.22759.python-list@python.org>
References: <op.tv98rva4wepdt4@ericb.pragmadev>	<mailman.1677.1186412323.22759.python-list@python.org>	<7xlkcopu4r.fsf@ruckus.brouhaha.com>	<7x7io8r6na.fsf@ruckus.brouhaha.com>
	<hgamo4-p2m.ln1@lairds.us>	<46B9DE7B.3050909@codebykevin.com>	<mailman.1750.1186587557.22759.python-list@python.org>	<46B9F09B.2060903@codebykevin.com>
	<mailman.1757.1186592594.22759.python-list@python.org>
Message-ID: <54bd9$46ba09ec$4275d90a$9068@FUSE.NET>

Chris Mellon wrote:

>> What do you mean here? Things like keyboard accelerators, menu
>> placement, and so on? Those things are already natively implemented by
>> Tk, and the developer just needs to invoke them. Sometimes some
>> conditional code is required for stuff like keyboard accelerators (the
>> "tk windowingsytem" command is useful for this), but again, it should
>> Just Work.
>>
>> Or am I missing something?
>>
> 
> There's conventions for shortcuts and they vary by platform. For
> example, home/end do different things on a mac vs on windows.
> Scrollbars interact differently, and menu pulldowns operate
> differently. To my knowledge, while Tile can replicate the *look* of
> these things, it does not help with the interaction.

On Windows and Mac, Tk gets the menus correct by default (menu is at the 
top of the screen on the Mac, attached to a window on Windows). The Tk 
scrollbar is native on the Mac; the Tile  scrollbar has problems. On 
Windows, the Tile scrollbar maps to Vista or XP or Win32, depending on 
Windows version. You need to correctly specify the command-accelerator 
in your code (on Windows it's the Control key, on the Mac it's Command), 
but assuming you do this, it works fine. I don't use "home" and "end" 
keys myself (I think these are more common on Windows than Mac) so I 
can't speak to that. Under Tk, keyboard navigation with the tab key 
generally works as expected on the Mac, and I assume so for Windows as 
well.

The biggest drawback with Tk/Tile on the Mac is that even with Tile 
theming, it's still a bit outdated--Tile hooks into some older API's on 
the Mac that are more compatible with Tk; for instance, the notebook 
tabs look like Jaguar-era tabs (c. 2002). The Tile scrollbar is broken, 
but the Tk one works natively.

Tile on Windows looks pretty darn good--I've played with the Windows 
Inspection Tool Kit, a well-designed Tcl/Tk application on Windows XP 
that uses Tile, and it's indistinguishable from something developed in 
VB or Delphi. (See http://magicsplat.com/wits/screenshot.html). Tile on 
the Mac requires a bit more hackery, but it's quite possible to get 
something looking nearly native (see 
http://www.codebykevin.com/portauthority.html).

As for X, Tk and Tile are more of a mixed bag, because there is simply 
no single standard to target. Standard Tk looks and feels like Motif, as 
you know. Some of the Tile themes under X don't look much better. The 
most popular Tile theme on X is probably Clam, which looks more like a 
modern Gtk Clearlooks-style theme (see 
http://tktable.sourceforge.net/tile/screenshots/demo-clam-unix.png or 
http://www.codebykevin.com/pylocate-tile-x11.png). As far as I know, 
Tk/Tile offers reasonable defaults for X, unless you are looking for 
specfic integration with a particular environment (i.e. Gnome or KDE); 
in that case it's not as acceptable.

> 
> Don't think I'm singling out Tk, Gtk has exactly the same problem -
> you can make the buttons look native, but it doesn't adjust the
> behavior.

Tk does a better job with platform-specific defaults and behaviors than 
Gtk. When I read complaints about Tk on Windows, it's more on how ugly 
Tk is, not that its menus/keyboard behaviors don't work correctly.

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From wildemar at freakmail.de  Mon Aug 13 07:41:54 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Mon, 13 Aug 2007 13:41:54 +0200
Subject: check if var is dict
In-Reply-To: <46C02BFA.10703@al.com.au>
References: <46C02BFA.10703@al.com.au>
Message-ID: <46C04382.7050808@freakmail.de>

Astan Chee wrote:
> Hi,
> I have a variable, I want to check if it is a dictionary or a string.
> Is there any better way to do this than I've done. How I did it is by 
> doing a .items() and catching a AttributeError that it raises if its not 
> a dictionary.
> How do i properly do it?
>   
The way you did, actually :).
Look for "It's better to ask for forgiveness than for permission" (or 
so) and the term "duck typing". That's the way to do it in python.

And just for completeness' sake: You could have also checked for actual 
types via "isinstance(your_variable, dict) or "type(your_variable) is 
type(dict)" or ... But your approach is the recomended one.

/W


From fabioztessitore at libero.it  Thu Aug  2 04:58:18 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 02 Aug 2007 08:58:18 GMT
Subject: Error with Tkinter and tkMessageBox
References: <46af71b7$0$10619$4fafbaef@reader2.news.tin.it>
	<mailman.1481.1186027758.22759.python-list@python.org>
Message-ID: <46b19caa$0$17951$4fafbaef@reader1.news.tin.it>

Il Thu, 02 Aug 2007 13:54:46 +1000, John McMonagle ha scritto:

 
> What window manager are you using ?

Hi John,

I'm using gnome, with gdm. Do you think the problem is this? I'm going to 
try with another one ... 

bye


From Dominic at PLEASEASK.co.uk  Tue Aug 14 04:13:47 2007
From: Dominic at PLEASEASK.co.uk (special_dragonfly)
Date: Tue, 14 Aug 2007 09:13:47 +0100
Subject: about negative polar plots
References: <1187076466.955318.249250@57g2000hsv.googlegroups.com>
	<9radnTbkCoefwFzbnZ2dnUVZ_vPinZ2d@speakeasy.net>
Message-ID: <46c16063$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>


"Erik Max Francis" <max at alcyone.com> wrote in message 
news:9radnTbkCoefwFzbnZ2dnUVZ_vPinZ2d at speakeasy.net...
> yadin wrote:
>
>> hi am doing a polar plot of the radiation pattern of an antenna.
>> the polar plots represents the value of the power in dB's and the dB
>> go from -40dB to 0dB
>> as the angle theta changes from 0 to 2*pi rads
>> the polar plot in python goes with positive values
>> how can i solve this problem
>> rough example
>> example:
>> power = arange(-40,0,-10)
>> theta = arange(0, 2pi,pi/12)
>> polar(power,theta)
>> title.....?
>> how can i show the step on the polar plot  plot(-40, -30,-20,-10,0)
>
> What is arange?  What is polar?  What is plot?  You're going to have to 
> give more information about what you're doing, what you're using to do it, 
> and where it's giving you unexpected or undesired results if you want help 
> solving your problem.
>
> -- 
> Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
>  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
>   So look into my eyes / I won't tell you lies
>    -- Neneh Cherry

I can understand the problem, that when plotting in polar co-ordinates the 
center of the plot is a value of zero. You're wanting a value of -40 at the 
center? Is this a fixed quantity? The lines would then extend out to be zero 
at infinity, presumably by an inverse square law (as it's dB's - unless my 
physics is wrong).
It sounds horrible, but if you know the angle and value, could you not 
convert to cartesian co-ordinates and plot them?
Am I also right in thinking that the example you've given is MATLAB code 
where you have essentially 2 lists and a function?
So power=arange(-40,0,-10) is a list looking like this: [-40,-30,-20,-10,0]
theta is a list from 0 to 2pi increasing in increments of pi/12 and the 
function polar takes the power and theta value and returns... pass (would 
need to look up the function).
http://www.k0gkd.com/fd02.jpg <-- something like this at the end of the day 
is what is wanted - correct?

Now I'm not sure why you can't take your negative value and modulus it with 
40 (or whatever value you want at the center). So -40 becomes 40 becomes 0 
(the center), -30 becomes 30 becomes 10 (the next band out?)
At the end of the day it'll be the labels on the graph you need to change.

Tell me if this helps!
Dominic




From gagsl-py2 at yahoo.com.ar  Mon Aug 20 04:26:57 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Aug 2007 05:26:57 -0300
Subject: Retry: Question about FutureWarning
References: <alpine.LFD.0.999.0708142137550.22214@saturn.syslang.net>
Message-ID: <op.txcm27jdx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Tue, 14 Aug 2007 22:44:17 -0300, Steven W. Orr <steveo at syslang.net>  
escribi?:

> The shell compile command I use to generate both the .pyc and the .pyo
> files is:
>
> python=/usr/bin/python2.3
> i_python ()
> {
>       $python -c "import $1"
>       $python -O -c "import $1"
> }

This is irrelevant to your main question - but try the compileall module  
in the standard library.

-- 
Gabriel Genellina



From yattamax at gmail.com  Wed Aug  1 08:15:26 2007
From: yattamax at gmail.com (The Max)
Date: Wed, 01 Aug 2007 12:15:26 -0000
Subject: wxPython version question
Message-ID: <1185970526.612299.277930@o61g2000hsh.googlegroups.com>

Hi at all


Hi have need of testing the version of wxPython in use .... at the
moment I use wxversion, but I don't can find a method for testing
version like this:

if versionOfWX() <= 2.8:

or

if versionOfWX() >= 2.8:

( versioneOfWX is a pseudo-function  create for this example )



Someone know a solution for this ?



Thanks and sorry for my orrible english



From Andy.cheesman at bristol.ac.uk  Wed Aug 29 09:31:23 2007
From: Andy.cheesman at bristol.ac.uk (Andy Cheesman)
Date: Wed, 29 Aug 2007 14:31:23 +0100
Subject: Python molecular viewer
Message-ID: <46D5752B.4030108@bristol.ac.uk>

Dear People,

I was wondering if people could recommend a simple molecular viewing
package written in python. I'm working in Theoretical chemistry and I'm
not after an all-singing dancing molecular rendering package(pymol does
that rather well) but a program which reads XYZ files and displays
simple structures which can be rotated in 3D

Thanks

Andy


From laurent.pointal at limsi.fr  Tue Aug 14 09:10:51 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 14 Aug 2007 15:10:51 +0200
Subject: Script to copy database
In-Reply-To: <GeOdnSj725utPFzbnZ2dnUVZ_vOlnZ2d@centurytel.net>
References: <GeOdnSj725utPFzbnZ2dnUVZ_vOlnZ2d@centurytel.net>
Message-ID: <f9s9ks$hns$1@news2.u-psud.fr>

Tony a ?crit :
> I'm new at this and would like to know how set up a script to copy a 
> database from a local computer to a network at a certain time everyday. 
> Should be simple enough, but, as of now I am unfamiliar with how to do this. 
> Would this be done by writing a script and setting up a  scheduled task to 
> run the script?  Can anyone help me with the script?  Just need it to copy 
> an Access database from the local C: drive to a network F: drive.
> 
> Thanks,
> Tony 
> 
> 

As you wrote about c: and f:, I imagine you are working under Windows.
IMHO you dont need Python for that.

domybackup.bat

copy c:\mypathtothefile\thefile.xxx F:\mypathdobackudir\


And use your "planificateur de taches" (its corresponding english 
control panel) to setup a periodic call to this batch file, eventually 
associate an ad-hoc account to the task, so that the batch can access 
the file to backup.


If you need more (ie. network access to setup/clean), here is a copy of 
a script I use to export (using a Python script) an Access database. 
Just replace the call to the Python script by a simple call to copy xxx 
yyyy.



@echo off
REM LANCEMENT DE L'EXPORT DE LA BASE ADMINISTRATIVE EN MODE TACHE
REM DE FOND (BATCH).

SET EXPORTS_BATCH=1
REM Parametres pour se connecter a la machine de transfert.
SET EXPORTS_HOST=thecomputer
SET EXPORTS_SHARE=data
SET EXPORTS_DRIVE=O:
SET EXPORTS_USER=theremotuser
SET EXPORTS_PASSWD=theremotepasswd
REM Montage du volume.
REM le start pour permettre d'attendre que le montage soit effectif.
START /wait NET USE %EXPORTS_DRIVE% \\%EXPORTS_HOST%\%EXPORTS_SHARE% 
%EXPORTS_PASSWD% /USER:%EXPORTS_USER% /PERSISTENT:No
IF ERRORLEVEL 1 GOTO erreur_montage

REM Parametres pour le script Python.
SET SCRIPT_EXPORT="C:\Documents and Settings\myaccount\My 
Documents\mybexport.py"
SET DSN_BASE_ADMIN=mydbaccound
SET LOGIN_BASE_ADMIN=mydbpasswd
SET PATH_FICHIERS_EXPORTS=%EXPORTS_DRIVE%\
REM Variables d'environnement eventuellement utiles...
SET TEMP=%PATH_FICHIERS_EXPORTS%
SET TMP=%PATH_FICHIERS_EXPORTS%
REM Lancement du script Python qui realise l'export.
C:\Tools\Python24\python.exe %SCRIPT_EXPORT%

REM Deconnexion du volume.
NET USE %EXPORTS_DRIVE% /DELETE

goto termine

:erreur_montage
ECHO "Erreur %ERROR_LEVEL% au montage de 
\\%EXPORTS_HOST%\%EXPORTS_SHARE% en lecteur %EXPORTS_DRIVE%."

:termine


From danb_83 at yahoo.com  Thu Aug 23 23:49:48 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: Thu, 23 Aug 2007 20:49:48 -0700
Subject: beginner, idomatic python 2
In-Reply-To: <13csjmeaoqh9le3@corp.supernews.com>
References: <13csjmeaoqh9le3@corp.supernews.com>
Message-ID: <1187927388.173203.298660@e9g2000prf.googlegroups.com>

On Aug 23, 10:21 pm, "bambam" <da... at asdf.asdf> wrote:
> Would someone like to suggest a replacement for this? This is a
> function that returns different kinds of similar objects, depending
> on what is asked for. PSP and PWR are classes.  I don't really
> want to re-write the calling code very much: I'm just wondering
> if the function can be replaced with some kind of OOP pattern.
>
> def Device(DeviceType):
>     if DeviceType=='PSP':
>         return PSP()
>     elif DeviceType=="Power Supply"
>         return PWR()
>     etc...
>
> Thanks!

Typically, you'd use a dictionary:

DEVICE_DICT = {
    'PSP': PSP.
    'Power Supply': PWR,
    # etc.
}

and your function would simply return DEVICE_DICT[device_type]()



From jrjt at 411.ca  Wed Aug  1 20:18:16 2007
From: jrjt at 411.ca (Bell)
Date: Wed, 1 Aug 2007 17:18:16 -0700
Subject: Doc
Message-ID: <46B122C8.1060700@insuranceland.org>


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From vito.detullio at gmail.com  Fri Aug 24 11:24:32 2007
From: vito.detullio at gmail.com (ZeD)
Date: Fri, 24 Aug 2007 15:24:32 GMT
Subject: List Comprehension Question: One to Many Mapping?
References: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
	<7x8x81l9z3.fsf@ruckus.brouhaha.com>
	<mailman.241.1187951774.32294.python-list@python.org>
Message-ID: <QKCzi.96010$U01.834323@twister1.libero.it>

Boris Borcic wrote:

>>> For example, if I have x=[ [1,2], [3,4] ]
>>> What I want is a new list of list that has four sub-lists:
>>> [[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]]
>> [[a, map(f,a)] for a in x]
> [map(g,a) for a in x for g in [None,f]]
> will do it.
> 
> ...a bit too cleverly, but there's worse :
> list((yield a) or map(f,a) for a in x)

worse (in *many* ways) solutions:

l = [[a, map(f,a)] for a in x]

1) s = sum(l, [])

2) from operator import add
   r = reduce(add, l, [])

3) a = []
   for e in l: a.extend(e)

-- 
Under construction


From kyosohma at gmail.com  Fri Aug 17 09:56:12 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 17 Aug 2007 06:56:12 -0700
Subject: Downloading multiple csv files from a website
In-Reply-To: <1187356117.474747.189980@g4g2000hsf.googlegroups.com>
References: <1187356117.474747.189980@g4g2000hsf.googlegroups.com>
Message-ID: <1187358972.458872.241790@i13g2000prf.googlegroups.com>

On Aug 17, 8:08 am, tkp... at hotmail.com wrote:
> I'd like to download data from the websitehttp://www.russell.com/Indexes/performance/daily_values_US.asp. On
> this web page, there are links to a number of .csv files, and I'd like
> to download all of them automatically each day. The file names are not
> visible on the page, but if I click on a link, a csv file opens in
> Excel. I've searched this group and looked into urllib, but have not
> found functions or code snippets that will allow me to download and
> rename each file. Would someone kindly point me to appropriate
> libraries/functions and/or code snippets that will get me started?
>
> Thanks in advance
>
> Thomas Philips

This link shows how to extract a list of URLs:
http://www.java2s.com/Code/Python/Network/ExtractlistofURLsinawebpage.htm

and this one shows how to download:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/83208

Mike



From paddy3118 at googlemail.com  Sat Aug  4 11:18:28 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 04 Aug 2007 15:18:28 -0000
Subject: (no) fast boolean evaluation ?
In-Reply-To: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
Message-ID: <1186240708.874804.271030@b79g2000hse.googlegroups.com>

On Aug 2, 10:47 pm, Stef Mientki <S.Mientki-nos... at mailbox.kun.nl>
wrote:
> hello,
>
> I discovered that boolean evaluation in Python is done "fast"
> (as soon as the condition is ok, the rest of the expression is ignored).
>
> Is this standard behavior or is there a compiler switch to turn it on/off ?
>
> thanks,
> Stef Mientki

The following program shows a(clumsy)? way to defeat the short-
circuiting:


def f(x):
  print "f(%s)=%s" % ('x',x),
  return x
def g(x):
  print "g(%s)=%s" % ('x',x),
  return x

print "\nShort circuit"
for i in (True, False):
  for j in (True, False):
    print i,j,":", f(i) and g(j)

print "\nShort circuit defeated"
for i in (True, False):
  for j in (True, False):
    print i,j,":", g(j) if f(i) else (g(j) and False)


The output is:

Short circuit
True True : f(x)=True g(x)=True True
True False : f(x)=True g(x)=False False
False True : f(x)=False False
False False : f(x)=False False

Short circuit defeated
True True : f(x)=True g(x)=True True
True False : f(x)=True g(x)=False False
False True : f(x)=False g(x)=True False
False False : f(x)=False g(x)=False False


- Paddy.




From nospam.themindstorm at gmail.com  Thu Aug  2 18:20:46 2007
From: nospam.themindstorm at gmail.com (Alex Popescu)
Date: Thu, 2 Aug 2007 22:20:46 +0000 (UTC)
Subject: Pythonic way for missing dict keys
References: <mailman.938.1184958565.22759.python-list@python.org>
	<pan.2007.07.21.00.20.54.768439@REMOVE.THIS.cybersource.com.au>
	<mailman.954.1184989959.22759.python-list@python.org>
	<Xns99748CC2DB4AAduncanbooth@127.0.0.1>
	<1185041243.323915.161230@x40g2000prg.googlegroups.com>
	<mailman.984.1185101740.22759.python-list@python.org>
	<87lkd0eprj.fsf@pobox.com>
	<mailman.1279.1185623588.22759.python-list@python.org>
	<pan.2007.07.29.04.10.19.329342@REMOVE.THIS.cybersource.com.au>
	<46b0ed0b$0$2257$426a74cc@news.free.fr>
	<mailman.1493.1186042809.22759.python-list@python.org>
	<46b1b0ba$0$25340$426a74cc@news.free.fr>
	<1i27mku.1sc8l3x1dda3crN%aleax@mac.com>
Message-ID: <Xns9981D5A0F001themindstorm@80.91.229.5>

aleax at mac.com (Alex Martelli) wrote in news:1i27mku.1sc8l3x1dda3crN%
aleax at mac.com:

> Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com>
> wrote:
> 
>> Alex Popescu a ?crit :
>
> [... snip ...]
>
> 
> The mere check of whether an object possesses some important special
> method is best accomplished through the abstract-base-classes machinery
> (new in Python 3.0: see <http://www.python.org/dev/peps/pep-3119/>).  At
> this time there is no Callable ABC, but you're welcome to argue for it
> on the python-3000 mailing list (please do check the archives and/or
> check privately with the PEP owner first to avoid duplication).
>

This PEP sounds very similar to Java interfaces (well, as an enhanced 
version as you are allowed to programmatically control this inheritance 
chain). Interesting approach. And now I can agree that the removal of 
callable() makes sense!

Thanks a lot for the pointer Alex.

./alex
--
.w( the_mindstorm )p.

> 
> Alex
>  




From kyosohma at gmail.com  Wed Aug  8 14:57:52 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 08 Aug 2007 18:57:52 -0000
Subject: Launch file from Python
In-Reply-To: <1186596679.600526.172640@r34g2000hsd.googlegroups.com>
References: <1186594137.971393.128780@57g2000hsv.googlegroups.com>
	<1186594611.490723.251870@m37g2000prh.googlegroups.com>
	<1186596679.600526.172640@r34g2000hsd.googlegroups.com>
Message-ID: <1186599472.265527.26140@j4g2000prf.googlegroups.com>

On Aug 8, 1:11 pm, jocago <joc... at gmail.com> wrote:

> The application, however, never runs. I'll give the sub-process a
> shot. Thanks.

Well, that's a problem. I suppose the best thing to try is use some
smaller sets of flags and see if they work. Instead of your long
string, try something smaller, like:

subprocess.Popen("xplanet-1.2.0/xplanet.exe -fontsize 24 -label -
target earth", shell=True)

Once you've gotten it to work on a smaller scale, you should be able
to work your way up.

Mike



From gandalf at shopzeus.com  Fri Aug 17 15:24:58 2007
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Fri, 17 Aug 2007 21:24:58 +0200
Subject: Problem with directory recursion!
In-Reply-To: <496954360708171116t4370c2ddra3d7905bc956c7eb@mail.gmail.com>
References: <496954360708171116t4370c2ddra3d7905bc956c7eb@mail.gmail.com>
Message-ID: <46C5F60A.6080305@shopzeus.com>


>
> Does anyone see anything immediately suspicious about the code? 
Yes. os.walk does the recursion for you. Either you should use 
os.listdir instead of os.walk, or use os.walk ONCE and iterate over the 
results. I prefer to use the former because usually I do not remember 
how os.walk works. Read and try the example that is given in the docs:

http://docs.python.org/lib/os-file-dir.html

Best,

   Laszlo



From grante at visi.com  Fri Aug 31 13:38:03 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 31 Aug 2007 17:38:03 -0000
Subject: Looking for Delaunay triangulation module...
References: <13dge9m2339ka68@corp.supernews.com>
Message-ID: <13dgkfr9n72sr32@corp.supernews.com>

On 2007-08-31, Grant Edwards <grante at visi.com> wrote:

> So for lack of a delaunay module, I'm stuck trying to port my
> application to Win32.

I've found that VTK contains a Delaunay triangulation module,
and Entought Python includes VTK, so that's next on my list of
things to try as soon as VTK finishes building on my Linux box
(where I do all of my actual development).

-- 
Grant Edwards                   grante             Yow! hubub, hubub, HUBUB,
                                  at               hubub, hubub, hubub, HUBUB,
                               visi.com            hubub, hubub, hubub.


From db3l.net at gmail.com  Wed Aug 29 16:08:25 2007
From: db3l.net at gmail.com (David Bolen)
Date: Wed, 29 Aug 2007 16:08:25 -0400
Subject: Creating a multi-tier client/server application
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
Message-ID: <m2642ygl3a.fsf@valheru.db3l.homeip.net>

Jeff <jeff.fw at gmail.com> writes:

> reasons, not the least of which is that I've been working almost
> entirely on web apps for the past few years, and I am getting mighty
> sick of it.  A lot of that is due to the language (PHP, which I have
> since grown to hate) I had to use.  I've worked on a site for my self
> in Python (using Pylons, actually--which is excellent) which was
> vastly easier and more fun.  But I'd really like to try something
> different.

To contribute a data point against your original question - I've a similar
(structurally, not functionality) system I completed recently.

Without trying to get too mired in the thick client v. web application
debate, there were a handful of points that decided me in favor of the
thick client:

* Needed to automate QuickTime viewer for video previews and extraction
  of selected frames to serve as thumbnails on web approval page.
* Needed to control transfers to server of multiple very large files
  (hundreds of MBs to GBs at a shot)

But assuming a thick client, in terms of your original question of
components to use, here's what I've got.  My primary networking component
is Twisted.

The pieces are:

Client (OS X Cocoa application):

* PyObjC based.  Twisted for networking, Twisted's PB for the primary
  management channel, with an independent direct network connections for
  bulk file transfers.  (I needed to go Mac native for clean integration of
  QuickTime UI elements including frame extraction to thumbnails)

Server:

* Twisted for networking.  PB and raw connections for clients, web server
  through twisted.web.  Genshi for web templating, with Mochikit (might
  move to JQuery) for client-side JS/AJAX.  Twisted for email transmission
  (email construction using normal Python email package).  Small UI
  front-end module (Cocoa/PyObjC).

The client accesses server-based objects through Twisted PB, which for some
of the server objects also control session change lifetime (transactions).
So at least in my case, having a stateful connection from the client worked
out well, particularly since I needed to coordinate both database changes
as well as filesystem changes through independent file uploads, each of
which can fail independently.
  
Right now a single server application contains all support for client
connections as well as the web application, but I could fracture that (so
the web server was independent for example) if needed.

For the client, I package it using py2app, and put into an normal Mac
installer, and distribute as a dmg.  If it were a Windows client, I'd
probably wrap with py2exe, then Inno Setup.  The server's web server has a
restricted URL that provides access to the DMG.  The client has a Help menu
item taking users to that URL.  Clients are versioned and accepted/rejected
by the server during initial connection - from the server side I can
"retire" old client versions, at which point users get a message at signon
with a button to take them to the download page for the latest DMG.

So right now upgrades are executed manually by the user, and I can support
older clients during any transition period.  I may provide built-in support
for automatically pulling down the new image and executing its installer,
but haven't found it a hardship yet.  I probably won't bother trying to
automate smaller levels of updates.

-- David


From jon at turnthepage.org  Sun Aug 12 13:12:04 2007
From: jon at turnthepage.org (Jon Rosebaugh)
Date: Sun, 12 Aug 2007 12:12:04 -0500
Subject: Web based Reporting tool for Python
References: <1186460956.945148.162610@k79g2000hse.googlegroups.com>
	<mailman.1722.1186522221.22759.python-list@python.org>
	<1186547726.383996.291360@d55g2000hsg.googlegroups.com>
	<2007080808575016807-jon@turnthepageorg>
	<1186891194.582444.222010@r34g2000hsd.googlegroups.com>
	<mailman.1871.1186916944.22759.python-list@python.org>
Message-ID: <2007081212120450073-jon@turnthepageorg>

On 2007-08-12 06:08:49 -0500, Steve Holden <steve at holdenweb.com> said:

> Steve Holden wrote:
>> Madhu Alagu wrote:
>>> On Aug 8, 4:57 pm, Jon Rosebaugh <j... at turnthepage.org> wrote:
>>>> On 2007-08-07 23:35:26 -0500, Madhu Alagu <alma... at gmail.com> said:
>>>> 
>>>>> Thanking so much for all the informations and links.I would like to
>>>>> use Mako Templates(www.makotemplates.org).Ilike to use simple and
>>>>> python default module...
>>>> Mako is an excellent template system, but you'll have a lot of work to
>>>> do making it into a reporting system.
>>> 
>>> 
>>> Any reporting template in python ?
>>> 
>> 
>> Dabo (www.dabodev.com) is certainly heading that way, but I am not sure 
>> how far it's got yet.
>> 
> Sorry, Dabo isn't web-based. You could look at Kid, Genshi, Cheetah, ...
> 
> Or you could do a Google search for "python web template" and see what 
> comes up. There are many good contenders.

Sure, but again, these aren't reporting engines; they're just template 
engines. And I don't think any of the web template engines have PDF 
output.



From steve at holdenweb.com  Thu Aug 23 17:29:02 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 23 Aug 2007 17:29:02 -0400
Subject: Putting #'s and variables together in 1 variable
In-Reply-To: <eb79828c0708231309g7a7dd38fpb6dad836b8552cb0@mail.gmail.com>
References: <eb79828c0708231309g7a7dd38fpb6dad836b8552cb0@mail.gmail.com>
Message-ID: <faku72$8fs$2@sea.gmane.org>

Lamonte Harris wrote:
>   File "Desktop\python\newsystem\init.py", line 51, in random_n
>     random_name = a+b+c+d+e+ 'temp.txt'
> TypeError: unsupported operand type(s) for +: 'int' and 'str'
> 
> import random
> def random_name():
>     a = random.randint(0,9)
>     b = random.randint(0,9)
>     c = random.randint(0,9)
>     d = random.randint(0,9)
>     e = random.randint(0,9)
>     random_name = a+b+c+d+e+ 'temp.txt '
>     return random_name
> print random_name
> 
> How can i make it so that it adds the random numbers and the temp.txt to 
> random_name variable w/out causing any error?
> 
random_name = "%d%d%d%d%dtemp.txt" % (a, b, c, d, e)

   or

random_name = str(a)+str(b)+str(c)+str(d)+str(e)+"temp.txt"

Unlike, for example, Perl, Python does not attempt many implicit 
conversions and instead forces you to say exactly what you mean. This 
has the advantage of clarity.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From iclark at mail.ewu.edu  Mon Aug 13 19:22:00 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Mon, 13 Aug 2007 16:22:00 -0700
Subject: JPype - passing to Java main
In-Reply-To: <1187040070.806416.75090@r34g2000hsd.googlegroups.com>
References: <1187040070.806416.75090@r34g2000hsd.googlegroups.com>
Message-ID: <f9qp2o$vkc$1@sea.gmane.org>

unlikeablePorpoise at gmail.com wrote:
> I am trying to get JPype to pass a String into a Java class main
> function. Demonstration code below:
> 
> =============JAVA============
> package com;
> 
> public class JPypeTest {
> 
>    public static void main(String args[]) {
> 	   System.out.println(args[0]);
>    }
> 
>    public void printArgument(String arg) {
> 	   System.out.println(arg);
>    }
> }
> 
> ===========PYTHON===========
> from jpype import *
> 
> startJVM("C:/Program Files/Java/jdk1.5.0_12/jre/bin/server/jvm.dll","-
> Djava.class.path=C:/jpypetest/test/")
> 
> com = JPackage("com");
> jp = com.JPypeTest();
> jp.printArgument('XXXX');
> #WANT TO CALL main("arg") HERE!!!!
> shutdownJVM()
> ===============================
> 
> What I want is to be able to call main() with an argument from the
> python file (using JPype) and have it echo
> args[0]. I can get this to work for printArgument(), but not for
> main().
> 
> Thanks,
> Sarah
> 

Try this:
com.JPypeTest.main("arg")

Ian



From whamil1 at entergy.com  Thu Aug  2 11:26:09 2007
From: whamil1 at entergy.com (Hamilton, William )
Date: Thu, 2 Aug 2007 10:26:09 -0500
Subject: Bug in Time module, or in my understanding?
In-Reply-To: <f8qvua$pa5$1@sea.gmane.org>
Message-ID: <588D53831C701746A2DF46E365C018CE01D2CAF7@LITEXETSP001.etrsouth.corp.entergy.com>

> From: Joshua J. Kugler
> 
> I am getting results like these with the time module:
> 
> >>> import time
> >>> int(time.mktime(time.strptime('2007-03-11 02:00:00', '%Y-%m-%d
%H:%M
> %S')))
> 1173610800
> >>> int(time.mktime(time.strptime('2007-03-11 03:00:00', '%Y-%m-%d
%H:%M
> %S')))
> 1173610800
> >>> time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(1173610800))
> '2007-03-11 03:00:00'
> 
> I know it probably has something to do with daylight savings, but how
can
> I
> get back out that which I put in?  The times concerned are all
standard
> time, so how can I keep the time module from asserting its belief that
I
> want to convert to daylight savings?
> 
> Incidentally, it only happens with times on 2007-03-11  from 02:00:00
to
> 02:59:59, and not with time data from past years.
> 

I get similar results, except with hours 01:00:00 and 02:00:00.  I am in
US Central time (GMT-6).

>>> int(time.mktime(time.strptime('2007-03-11 00:00:00','%Y-%m-%d
%H:%M:%S')))
1173592800
>>> int(time.mktime(time.strptime('2007-03-11 01:00:00','%Y-%m-%d
%H:%M:%S')))
1173596400
>>> int(time.mktime(time.strptime('2007-03-11 02:00:00','%Y-%m-%d
%H:%M:%S')))
1173596400
>>> int(time.mktime(time.strptime('2007-03-11 03:00:00','%Y-%m-%d
%H:%M:%S')))
1173600000


--
-Bill Hamilton


From hadronquark at googlemail.com  Mon Aug  6 05:44:22 2007
From: hadronquark at googlemail.com (Hadron)
Date: Mon, 06 Aug 2007 11:44:22 +0200
Subject: Emacs + python.
Message-ID: <00tzrdm1zd.fsf@googlemail.com>


Sorry to repeat, but I had to reinstall and lost all my news.

I am looking for pointers on using emacs with python. I use emacs v
22.0.91 (Ubuntu snapshot).

It comes with its own python mode.

The problem is that the debugger just hangs when I start it. The
interpreter runs fine. Any ideas?

What versions of python.el or python-mode.el or ..... are you using and
why?

Many thanks for any pointers.


From thorsten at thorstenkampe.de  Sat Aug 11 14:58:03 2007
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Sat, 11 Aug 2007 19:58:03 +0100
Subject: python 2.5 bug
References: <1186825286.493878.80380@l70g2000hse.googlegroups.com>
	<5i5fktF3ml00gU1@mid.uni-berlin.de>
	<1186826980.346619.287670@r34g2000hsd.googlegroups.com>
	<46bdfb3f$0$5102$ba4acef3@news.orange.fr>
Message-ID: <MPG.2128171394cc51d9989700@news.individual.de>

* Laurent Pointal (Sat, 11 Aug 2007 20:09:03 +0200)
>  vedrandekovic at v-programs.com wrote:
> > On 11 kol, 11:59, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> >> On Sat, 11 Aug 2007 02:41:26 -0700, vedrandekovic wrote:
> >> > I was install Python 2.5 and uninstall Python 2.4 now I cannot run my
> >> > scripts, only from idle
> 
> IMHO Python 2.4 was registered for .py files, Python 2.5 take precedence
> when installed, but when Python 2.4 has been removed, it remove .py files
> association too (so break Python 2.5 association).
> 
> * manually associate .py/.pyc/.pyo files to python.exe, .pyw files to
> pythonw.exe.
> 
> * or reinstall Python 2.5 so that it re-setup ad-hoc associations.

Yeah. Did the Original Poster mention any details about his problem. 
Like - for instance - that he's using Windows?

Thorsten


From igorr at ifi.uio.no  Wed Aug 29 10:15:45 2007
From: igorr at ifi.uio.no (Igor V. Rafienko)
Date: 29 Aug 2007 16:15:45 +0200
Subject: non-blocking communication with imaplib
References: <xjv8x84dm33.fsf@oinn.ifi.uio.no> <faud2f$5cn$1@lust.ihug.co.nz>
Message-ID: <xjvk5rewhny.fsf@oinn.ifi.uio.no>

[ Lawrence D'Oliveiro ]

[ ... ]

> According to the documentation
> <http://docs.python.org/lib/imap4-objects.html>, you can override
> the "read" and "readline" methods. How about replacing them with
> routines that use select.select on the socket() object to implement
> a timeout?


Sounds like a plan. I'll try that. Thank you.





ivr
-- 
<+Kaptein-Dah> igorr: for f? parenteser
<+Kaptein-Dah> igorr: parenteser virker som lubrication under iterasjon
<+Kaptein-Dah> igorr: velkjent


From thomas.lidebrandt at gmail.com  Thu Aug 16 04:27:54 2007
From: thomas.lidebrandt at gmail.com (thomas.lidebrandt at gmail.com)
Date: Thu, 16 Aug 2007 01:27:54 -0700
Subject: Changing button preferences after beeing pressed
Message-ID: <1187252874.903820.79280@a39g2000hsc.googlegroups.com>

Hello

I'm using wxPython to consruct a GUI and want to change a button label
and event handler to change after the button have been pressed. The
only thing I can think of is a global variable that contrls the state
of the program and constructs the button in accordance to the defined
state. Is there a better solution to this problem?

/Thomas



From srikrishnamohan at gmail.com  Thu Aug  2 03:51:10 2007
From: srikrishnamohan at gmail.com (km)
Date: Thu, 2 Aug 2007 13:21:10 +0530
Subject: beginner in python
In-Reply-To: <f8ro29$gl2$1@sea.gmane.org>
References: <aa405c1f0708012127j471c9b2dl35b74cda9f595d09@mail.gmail.com>
	<f8ro29$gl2$1@sea.gmane.org>
Message-ID: <f4cc03640708020051v7237e854ped7a0e9fc41e800a@mail.gmail.com>

Hi
Welcome to python !
there a a few suggestions in ur code which is a good practice to follow.
In the snippet:

> > for x in range(len(x_value)):
> >              x_co = float(x_value[x])-float(x_value[x+1])
> >              y_co = float(y_value[x])-float(y_value[x+1])
> >              z_co = float(z_value[x])-float(z_value[x+1])
> >              data = math.sqrt(x_co)*(x_co)+(y_co)*(y_co)+(z_co)*(z_co)
> >              print data

U suddenly change the indent from four spaces which u followed in previous
for loop. pls maintain consistency in indent. Standard  convention is to use
four spaces for indent.

Another problem is that u have not closed the filehandle  in the program!

HTH
KM
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From bdesth.quelquechose at free.quelquepart.fr  Mon Aug 20 13:11:58 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 20 Aug 2007 19:11:58 +0200
Subject: advice about `correct' use of decorator
In-Reply-To: <mailman.2085.1187302439.22759.python-list@python.org>
References: <mailman.2074.1187294411.22759.python-list@python.org>	<2vydnTio1a9IWlnbnZ2dnUVZ_jKdnZ2d@comcast.com>
	<mailman.2085.1187302439.22759.python-list@python.org>
Message-ID: <46cca037$0$422$426a74cc@news.free.fr>

Gerardo Herzig a ?crit :
> Steven Bethard wrote:
> 
>> Gerardo Herzig wrote:
>>  
>>
>>> Hi all. I guess i have a conceptual question:
>>> Im planing using a quite simple decorator to be used as a conditional 
>>> for the execution of the function. 
(snip)
>>>
>>> Something in my mind tells me that this is not the pythonic way...But 
>>> i like the idea, so please tell me that im in the right way :)
>>>   
>>
>> Django does it almost exactly this way:
(snip)
 >
> Great! So from now on, my idea is labeled as `djangothic' :)
> Thanks a lot!

Which doesn't necessarily imply it's pythonic !-)



From martin at v.loewis.de  Sun Aug 12 18:43:01 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 13 Aug 2007 00:43:01 +0200
Subject: Python not freeing memory (?)
In-Reply-To: <mailman.1882.1186951800.22759.python-list@python.org>
References: <mailman.1882.1186951800.22759.python-list@python.org>
Message-ID: <46bf8cf5$0$29938$9b622d9e@news.freenet.de>

> Is there *any* way of getting around this?

Sure: Determine the bug, and fix it. A prerequisite
is that you have the source code of all extension modules
which you are using, but that seems to be the case.

If you want others to help you in finding the bug, you
need to provide more detail, e.g. a specific piece of
code that reproducibly wastes memory. If you want to
study how Python objects are allocated and released,
you need to create a debug build of Python (and all
extension modules), and start, e.g., with looking at the
value of sys.gettotalrefcount() over time.

HTH,
Martin


From martin at v.loewis.de  Wed Aug 22 18:45:38 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 23 Aug 2007 00:45:38 +0200
Subject: MsiLib
In-Reply-To: <mailman.141.1187816227.32294.python-list@python.org>
References: <mailman.141.1187816227.32294.python-list@python.org>
Message-ID: <46ccbc92$0$24474$9b622d9e@news.freenet.de>

Charlie schrieb:
> This doesn't seem to be my day for this. When I add view.Execute() to
> the script, it gives me an error of Execute() takes exactly 1 argument
> (0 given). I can't seem to find anything on the Microsoft page that
> concerns the execute function that states what exactly needs to be
> included as an argument, especially for a select statement. Thanks for
> the help.

It's ok to pass None as the parameter to Execute; this means that
a null handle gets passed as hRecord to MsiViewExecute.

Regards,
Martin


From pavlovevidence at gmail.com  Fri Aug 17 20:02:31 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 17 Aug 2007 17:02:31 -0700
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187316113.424465.34650@19g2000hsx.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<1187314114.873306.187500@e9g2000prf.googlegroups.com>
	<1187316113.424465.34650@19g2000hsx.googlegroups.com>
Message-ID: <1187395351.199508.111720@m37g2000prh.googlegroups.com>

On Aug 16, 10:01 pm, Paul McGuire <pt... at austin.rr.com> wrote:
> On Aug 16, 8:28 pm, Jonathan Gardner
>
>
>
> <jgardner.jonathangardner.... at gmail.com> wrote:
> > On Aug 16, 3:35 pm, beginner <zyzhu2... at gmail.com> wrote:
>
> > > In perl it is just one line: $a=$b->{"A"} ||={}.
>
> > a = b.setdefault('A', {})
>
> > This combines all two actions together:
> > - Sets b['A'] to {} if it is not already defined
> > - Assigns b['A'] to a
>
> > More info on dict methods here:
>
> >http://docs.python.org/lib/typesmapping.html
>
> No, this has already been proposed and discarded.  The OP does NOT
> want this, because it always generates an empty {} whether it is
> needed or not.  Not really a big hardship, but if the default value
> were some expensive-to-construct container class, then you would be
> creating one every time you wanted to reference a value, on the chance
> that the key did not exist.
>
> Carl Banks' post using defaultdict is the correct solution.  The
> raison d'etre for defaultdict, and the reason that it is the solution
> to the OP's question, is that instead of creating a just-in-case
> default value every time, the defaultdict itself is constructed with a
> factory method of some kind (in practice, it appears that this factory
> method is usually the list or dict class constructor).  If a reference
> to the defaultdict gives a not-yet-existing key, then the factory
> method is called to construct the new value, that value is stored in
> the dict with the given key, and the value is passed back to the
> caller.  No instances are created unless they are truly required for
> initializing an entry for a never-before-seen key.


When I made my response, it occurred to me that Python could be
improved (maybe) if one could overload dict.get() to use a factory,
like so:

b = {}
a = b.get(k,factory=dict)
a['A'] = 1

That's a slight improvement (maybe) over defaultdict since it would
still allow the same dict to have the membership check in other
places.  I'm not so sure overloading get to let it modify the dict is
a good idea, though.

Actually, it'd probably be fairly uncontroversial to add a factory
keyword to dict.setdefault().  At least insofar as setdefault is
uncontroversial.


Carl Banks



From gagsl-py2 at yahoo.com.ar  Wed Aug 22 23:34:42 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 23 Aug 2007 00:34:42 -0300
Subject: Design philosophy of HTTPServer and BaseHTTPRequestHandler
References: <1187776216.269456.310230@q4g2000prc.googlegroups.com>
	<1187790329.575480.14070@i38g2000prf.googlegroups.com>
	<1187814421.263942.202220@x35g2000prf.googlegroups.com>
Message-ID: <op.txhtj4ikx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 22 Aug 2007 17:27:01 -0300, tzuchien.chiu  
<tzuchien.chiu at gmail.com> escribi?:

> On 22 ago, 14:45, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
>> The server is permanent; request handler instances are created and
>> destroyed as HTTP requests arrive and are processed.
>> You should store any permanent info in the server; your
>> "BaseHTTPRequestHandler-derived class" can reference the server using
>> its "server" attribute.
>
> I found the server attribute in the source code (/Lib), but it is not
> documented in Python Library Reference 18.19.
>
> I wonder that if I can rely on this "undocumented" attribute?

It is OK to use it, it's documented under the base class,  
SocketServer.RequestHandler

-- 
Gabriel Genellina



From kyosohma at gmail.com  Mon Aug  6 09:56:42 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 06 Aug 2007 06:56:42 -0700
Subject: webbrowser.open question force Firefox
In-Reply-To: <mailman.1665.1186396929.22759.python-list@python.org>
References: <e75321bd0708060259p32249f96sa327ec4b505cc981@mail.gmail.com>
	<mailman.1665.1186396929.22759.python-list@python.org>
Message-ID: <1186408602.487621.204400@i38g2000prf.googlegroups.com>

On Aug 6, 5:42 am, Thomas Jollans <tho... at jollans.com> wrote:
> On Monday 06 August 2007, dimitri pater wrote:
>
> > Hi,
> > I have a question regarding the use of webbrowser.open.
> > On a windows XP machine, MS-IE is set as the default browser so when I do:
> > webbrowser.open('http://localhost:8080') IE starts with this address.
> > But in stead of launching IE, I want to launch Firefox *without* setting
> > Firefox as the default browser globally on this machine.
>
> > Any hints, ideas? Your help is most appreciated.
>
> take an educated guess where to find firefox, check if it's there, and do
> something like
>   os.spawnl(os.P_NOWAIT, where_firefox_is, "http://localhost:8080")
>
> --
>       Regards,                       Thomas Jollans
> GPG key: 0xF421434B may be found on various keyservers, eg pgp.mit.edu
> Hacker key <http://hackerkey.com/>:
> v4sw6+8Yhw4/5ln3pr5Ock2ma2u7Lw2Nl7Di2e2t3/4TMb6HOPTen5/6g5OPa1XsMr9p-7/-6
>
>  signature.asc
> 1KDownload

Shouldn't you be using the subprocess module instead as it is
replacing the os.spawn* functionality from 2.4 on? See
http://docs.python.org/dev/lib/module-subprocess.html

If so, then the code would be:

subprocess.Popen(r'where_firefox_is http://localhost:8080')

Mike



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Aug 10 18:03:41 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 11 Aug 2007 00:03:41 +0200
Subject: The Future of Python Threading
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<5i329uF3muir4U1@mid.individual.net>
	<slrnfbou9k.vkb.nick@irishsea.home.craig-wood.com>
Message-ID: <5i45luF3mvdesU1@mid.individual.net>

Nick Craig-Wood wrote:
[GIL]
> That is certainly true.  However the point being is that running
> on 2 CPUs at once at 95% efficiency is much better than running on
> only 1 at 99%...

How do you define this percent efficiency?
 
>>> The truth is that the future (and present reality) of almost
>>> every form of computing is multi-core,
>> 
>>  Is it? 8)
> 
> Intel, AMD and Sun would have you believe that yes!

Strange, in my programs, I don't need any "real" concurrency (they
are network servers and scripts). Or do you mean "the future of
computing hardware is multi-core"? That indeed may be true.

>>  The question is: If it really was, how much of useful
>>  performance gain would you get?
> 
> The linux kernel has been through these growing pains already... 
> SMP support was initially done with the Big Kernel Lock (BKL)
> which is exactly equivalent to the GIL.

So, how much performance gain would you get? Again, managing
fine-grained locking can be much more work than one simple lock.

> The linux kernel has moved onwards to finer and finer grained
> locking.

How do you compare a byte code interpreter to a monolithic OS
kernel?

> I'd like to see a python build as it is at the moment and a
> python-mt build which has the GIL broken down into a lock on each
> object. python-mt would certainly be slower for non threaded
> tasks, but it would certainly be quicker for threaded tasks on
> multiple CPU computers.

>From where do you take this certainty? For example, if the program
in question involves mostly IO access, there will be virtually no
gain. Multithreading is not Performance.
 
> The user could then choose which python to run.
> 
> This would of course make C extensions more complicated...

Also, C extensions can release the GIL for long-running
computations.

Regards,


Bj?rn

-- 
BOFH excuse #391:

We already sent around a notice about that.



From ca.allen at gmail.com  Fri Aug  3 15:05:29 2007
From: ca.allen at gmail.com (Chris Allen)
Date: Fri, 03 Aug 2007 12:05:29 -0700
Subject: Global package variable, is it possible?
In-Reply-To: <mailman.1581.1186165038.22759.python-list@python.org>
References: <1186160415.065108.139160@e9g2000prf.googlegroups.com>
	<46b36b31$0$10622$4fafbaef@reader2.news.tin.it>
	<mailman.1581.1186165038.22759.python-list@python.org>
Message-ID: <1186167929.165336.305380@d30g2000prg.googlegroups.com>

On Aug 3, 11:16 am, Carsten Haese <cars... at uniqsys.com> wrote:
> On Fri, 2007-08-03 at 17:51 +0000, Fabio Z Tessitore wrote:
> > Heve you tried to do something like:
>
> > # module configure.py
> > value1 = 10
> > value2 = 20
> > ...
>
> > # other module
> > from configure import *
>
> > # now I'm able to use value1 value2 etc.
> > var = value1 * value2
>
> Right idea, wrong execution. Note that the OP said "I'd like to be able
> to reload the config file dynamically and have all my modules
> automatically receive the new config."
>
> "from configure import *" will import the settings into the current
> namespace, and subsequent changes in the original namespace will, in
> general, not have any effect in the current namespace.
>
> This should do the trick:
>
> # module configure.py
> value1 = 10
> value2 = 20
> ...
>
> # other module
> import configure
>
> var = configure.value1 * configure.value2
>
> HTH,
>
> --
> Carsten Haesehttp://informixdb.sourceforge.net

It does help thanks.  Okay now after reading your post I really need
to do some experimenting.  I was under the impression when I wrote my
last post that changing an attribute in one modules instance in
__init__.py would not effect other modules.  Sorry, I'm relatively new
to python, and things like this are still sometimes "gotchas!" for me.



From tuomas.vesterinen at pp.inet.fi  Mon Aug 27 16:42:15 2007
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Mon, 27 Aug 2007 20:42:15 GMT
Subject: sorting a list of lists
In-Reply-To: <1188233798.684136.263640@22g2000hsm.googlegroups.com>
References: <1188233798.684136.263640@22g2000hsm.googlegroups.com>
Message-ID: <HGGAi.336$mg7.154@read3.inet.fi>

 >>> records = [['dog',1,2], ['chair',2,1], ['cat',1,3], ['horse',3,4],
... ['table',3,2], ['window',3,5]]
 >>> sorted(records, key = lambda x: (x[1], x[2]))
[['dog', 1, 2], ['cat', 1, 3], ['chair', 2, 1], ['table', 3, 2], 
['horse', 3, 4], ['window', 3, 5]]


nicksavill at googlemail.com wrote:
> Hi,
> 
> i would like to sort a list of lists. The list is first sorted on the
> second item in the sub-lists (which I can do), then on the third item
> (which I can't).
> 
> eg. records = [['dog',1,2], ['chair',2,1], ['cat',1,3], ['horse',3,4],
> ['table',3,2], ['window',3,5]]
> 
> I want sorted to [['dog',1,2], ['cat',1,3], ['chair',2,1], ['table',
> 3,2], ['horse',3,4], ['window',3,5]]
> 
> To sort on the second item in the sub-lists I do the following
> 
> pass1 = itemgetter(1)
> sorted(records, key=pass1)
> 
> How can I then sort on the third item in the sub-lists whilst keeping
> the order on the second item?
> 
> Nick
> 


From wgwigw at gmail.com  Wed Aug  1 03:20:04 2007
From: wgwigw at gmail.com (momobear)
Date: Wed, 01 Aug 2007 07:20:04 -0000
Subject: Any way to monitor windows network connection?
In-Reply-To: <mailman.1416.1185942217.22759.python-list@python.org>
References: <1185939997.135825.310080@z24g2000prh.googlegroups.com>
	<mailman.1416.1185942217.22759.python-list@python.org>
Message-ID: <1185952804.420205.98080@e16g2000pri.googlegroups.com>

On Aug 1, 12:22 pm, Jay Loden <pyt... at jayloden.com> wrote:
> momobear wrote:
> > hi, Is there any way to show me detailed listings of all TCP and UDP
> > endpoints in my microsoft windows XP in python way?
> > thanks.
>
> Not sure if it's exactly what you're looking for, but this might be of use as a starting point at least:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/392572

yes, I get it, iphelp api could do that for me. thanks for help.



From boazin at gmail.com  Fri Aug 10 12:07:46 2007
From: boazin at gmail.com (boazin at gmail.com)
Date: Fri, 10 Aug 2007 16:07:46 -0000
Subject: building a rather simple server in python
Message-ID: <1186762066.665768.215080@i38g2000prf.googlegroups.com>

Hi all,

I was trying to build a rather simple server (with a twist) using
asyncore and got myself complicated.
Well, here's the deal:

My server will handle multiple connections, some require reply, and
some not (they will disconnect by themselves)
all the clients want to to deliver binary data to a socket we'll call
P socket. this socket is a device that hopefully always wating for new
data (It's actually a hardware).
The replies will come on a different socket, we'll call socket T. When
the server receives a reply (again binary data) it will send it to all
the "wating for reply" clients (the client will determine if it is for
him or not).
My problems arise when I need to write to socket P and then somehow,
somewhen, read the responses from socket T.

Hopefully, the description is clear enough

I tried to use asyncore and got tangled up with the reactiveness of
it.
Any ideas? how to use it with asyncore? other implementations?



From ianare at gmail.com  Mon Aug 13 02:30:17 2007
From: ianare at gmail.com (=?iso-8859-1?B?aWFuYXLp?=)
Date: Mon, 13 Aug 2007 06:30:17 -0000
Subject: Colored text
In-Reply-To: <1186984232.440419.207990@l22g2000prc.googlegroups.com>
References: <1186970751.435970.189900@q3g2000prf.googlegroups.com>
	<1186981264.235988.40260@k79g2000hse.googlegroups.com>
	<1186984232.440419.207990@l22g2000prc.googlegroups.com>
Message-ID: <1186986617.423025.28600@57g2000hsv.googlegroups.com>

On Aug 13, 1:50 am, Rohan <vodela.... at gmail.com> wrote:
> On Aug 12, 10:01 pm, ianar? <ian... at gmail.com> wrote:
>
> > On Aug 12, 10:05 pm, Rohan <vodela.... at gmail.com> wrote:
>
> > > Hello,
> > > Can some one tell me how do I get colored text. Say when I want to
> > > write something in a text file , how do I get it colored.
>
> > Plain text files don't have color. You could output in html ...
>
> Oh ok what about a csv file, I know its also a text file but I want
> the color to be say blue in an excel sheet.

CSV is also pretty much plain text. No support for formatting.

You will need to write xls files. Personaly, I avoid proprietary file
formats like the plague, but this may be what you're looking for:

http://www.answermysearches.com/index.php/generate-an-excel-formatted-file-right-in-python/122/



From laurent.pointal at limsi.fr  Fri Aug  3 04:00:13 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 03 Aug 2007 10:00:13 +0200
Subject: (no) fast boolean evaluation ?
In-Reply-To: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
Message-ID: <f8unac$e3f$1@news2.u-psud.fr>

Stef Mientki a ?crit :
> hello,
> 
> I discovered that boolean evaluation in Python is done "fast"
> (as soon as the condition is ok, the rest of the expression is ignored).
> 
> Is this standard behavior or is there a compiler switch to turn it on/off ?

As it was replied, its standard behavior and cannot be modified.

IMHO, if you really need all your expressions to be evaluated, the clean 
(most readable) way may be:

a = <first_expression which must be evaluated>
b = <second_expression(x,y,z) which must be evaluated>
if a and b :
     ...

A+

Laurent.


From gerdusvanzyl at gmail.com  Tue Aug 14 12:24:39 2007
From: gerdusvanzyl at gmail.com (Gerdus van Zyl)
Date: Tue, 14 Aug 2007 16:24:39 -0000
Subject: pure python gaussian blur
Message-ID: <1187108679.401416.224060@19g2000hsx.googlegroups.com>

Does anyone have a relatively fast gaussian blur implemented in pure
python? Below is my attempt but it takes 2.9 seconds for a 320x240
image. Image comes from byte string: self.array =
array.array('B',srcstring). Would some sort of matrix multiplication
be faster? I don't have experience in that.

I don't want to use PIL or http://filters.sourceforge.net/ to avoid
the 300kb dll just for a simple blur.


    def blur(self):
        # Convolution Kernels
        blurFilter = [[0,1,2,1,0],
                      [1,2,4,2,1],
                      [2,4,8,4,2],
                      [1,2,4,2,1],
                      [0,1,2,1,0]]
        blurDiv = 48
        blurFilterSize = len(blurFilter) #5
        blurFilterSize2 = blurFilterSize * blurFilterSize

        pixels = self.array

        stride = self.width * 4
        w = self.width
        h = self.height
        red = 0
        green = 0
        blue = 0
        sx = 0
        ex = 0
        sy = 0
        ey = 0
        ss = 0
        f1 = 0
        f2 = 0
        ff = 0
        idx = 0
        samplesize = 0

        offset1 = blurFilterSize/2
        offset2 = blurFilterSize/2+2

        clr = array.array('B',[255,255,255,255])
        px = array.array('B',[255,255,255,255])

        for x in xrange(0,w): #w

            sx = x - offset1
            ex = x + offset2
            if sx < 0: sx = x
            if ex > w:  ex = w

            for y in xrange(0,h):
                sy = y - offset1
                ey = y + offset2

                if sy < 0: sy = y

                if ey > h:  ey = h

                samplesize = (ex-sx) * (ey-sy)
                if samplesize > 0:
                    ss = blurFilterSize2 / samplesize
                    if ss > blurFilterSize - 2:
                        ss = blurFilterSize - 2
                else:
                    ss = 0


                idx = 0
                ffx = 0
                red = 0
                green = 0
                blue = 0

                for vx in xrange(sx,ex):
                    for vy in xrange(sy,ey):
                        offset = vy * stride + vx * 4

                        px = pixels[offset:offset
+4]

                        f1 = idx / 5
                        f2 = (idx - f1) % 5
                        f1 += ss
                        if f1 > 4:
                            f1 = 4

                        ff = blurFilter[f1]
[f2]
                        #ff = 1
                        ffx += ff
                        red   += px[0] * ff
                        green += px[1] * ff
                        blue  += px[2] * ff
                        idx += 1


                if samplesize > 0:
                    red   = red / ffx
                    green = green / ffx
                    blue  = blue / ffx
                    if red > 255: red = 255
                    if green > 255: green = 255
                    if blue > 255: blue = 255

                    clr[0] = red
                    clr[1] = green
                    clr[2] = blue

                    self.setPixel(x, y, clr)



From rschroev_nospam_ml at fastmail.fm  Sat Aug 11 14:04:07 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sat, 11 Aug 2007 18:04:07 GMT
Subject: Augmented assignment (was Re: Something in the function tutorial
	confused me.)
In-Reply-To: <Xns99896DB601AF1OKB@199.45.49.11>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
	<m3hvi.37606$G23.6240@newsreading01.news.tds.net>
	<f9kdpq$drp$1@panix3.panix.com> <Xns99896DB601AF1OKB@199.45.49.11>
Message-ID: <rSmvi.47406$XJ3.819294@phobos.telenet-ops.be>

OKB (not okblacke) schreef:
> Aahz wrote:
> 
>>>>>>> tup=([],)
>>>>>>> tup[0] += ['zap']
>>>> Traceback (most recent call last):
>>>>   File "<stdin>", line 1, in <module>
>>>> TypeError: 'tuple' object does not support item assignment
> <snip>
>> Obviously, you can easily work around it:
>>
>>>>> t = ([],)
>>>>> l = t[0]
>>>>> l += ['foo']
>>>>> t
>> (['foo'],)
> 
>     	This is quite shocking to me, although after staring at the 
> documentation for a while I guess I understand it.  But it seems to me 
> that the documentation is somewhat misleading on this point, where it 
> says:
> 
>     	"An augmented assignment evaluates the target (which, unlike normal 
> assignment statements, cannot be an unpacking) and the expression list, 
> performs the binary operation specific to the type of assignment on the 
> two operands, and assigns the result to the original target."
> 
>     	This sentence is phrased as though it is the whole story, but it 
> isn't, because the operation might not in fact wind up being an 
> assignment. 

The way I understand this now, the assignment really always is an 
assignment.

1.
   - For immutable objects, the 'binary operation specific to the type of
     assignment on the two operands' doesn't modify any object, but only
     returns a new object which is the result of the operation.
   - For mutable objects that support the inplace-version of the
     operator, the operator modifies the object and then returns it.
3. In both cases that result is assigned to the target. In the second 
case the object was already modified so the assignment doesn't 
accomplish very much, but it still happens.

That explains why "tup[0] += ['zap']" both has an effect (tup[0] now 
contains 'zap') and raises an exception: tup[0] is modified because it 
is a list and lists support inplace addition, but the assignment fails 
because tuples don't support item assignment.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From oliver at ootbc.com  Sat Aug 18 00:25:12 2007
From: oliver at ootbc.com (Oliver Nelson)
Date: Fri, 17 Aug 2007 21:25:12 -0700
Subject: Canceling events on COM objects
Message-ID: <Hwuxi.5287$924.707@newssvr23.news.prodigy.net>

I have MapPoint working in Python, and I'm trying to cancel events on 
the map, but I can't seem to make that happen.  I'm responding to the 
events successfully in my panel object.  My code is like this:

global MapPointMod
MapPointMod = 
win32com.client.gencache.EnsureModule("{51C0A9CA-F7B7-4F5A-96F4-43927C6FA50F}", 
0, 1, 0)

class MyPanel(wx.Panel):
     def __init__(self, *args, **kwds):
         # begin wxGlade: MyPanel.__init__
         kwds["style"] = wx.TAB_TRAVERSAL
         wx.Panel.__init__(self, *args, **kwds)
         self.frame = args[0]

         MyMap = MakeActiveXClass(MapPointMod.MappointControl, 
eventObj=self)
         self.window_1 = MyMap(self, -1)
         self.window_1.OpenMap("C:\\TEMP\\GPS_ON.ptt")
...
...
     def OnBeforeClick(self, Button, Shift, X, Y, Cancel):
         print "tada"


My event fires just fine, but I can't seem to figure out how to cancel 
the event so that mappoint doesn't do its stuff with it...I've tried 
setting Cancel based on the mappoint specs, but it doesn't seem to get 
sent back anywhere...

Any ideas please?

Thanx,

OLIVER


From iapain at gmail.com  Fri Aug 31 12:43:45 2007
From: iapain at gmail.com (iapain)
Date: Fri, 31 Aug 2007 16:43:45 -0000
Subject: escaping only double quotes
In-Reply-To: <1188575379.041219.177910@19g2000hsx.googlegroups.com>
References: <1188575379.041219.177910@19g2000hsx.googlegroups.com>
Message-ID: <1188578625.662799.57020@i13g2000prf.googlegroups.com>

You could write a simple escape function.

def escape(html):
    "Return the given TEXT with ampersands, quotes and carets
encoded."
    return html.replace('&', '&amp;').replace('<',
'&lt;').replace('>', '&gt;').replace('"', '&quot;').replace("'",
'&#39;')



From bborcic at gmail.com  Wed Aug 15 10:01:57 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Wed, 15 Aug 2007 16:01:57 +0200
Subject: make images with python
In-Reply-To: <1i2vg8p.1d8t42r1jzvm9iN%raims@dot.com>
References: <1187147338.400947.181010@x40g2000prg.googlegroups.com>
	<1i2vg8p.1d8t42r1jzvm9iN%raims@dot.com>
Message-ID: <f9v12c$rb8$1@sea.gmane.org>

Lawrence Oluyede wrote:
> stefano <ssalvatori at gmail.com> wrote:
>> I need make some images using python but i'm lost :P
> 
> <http://www.pythonware.com/products/pil/>
> 

If you want to do antialiased drawings into images,
you might rather want to look for pil at

http://effbot.org/downloads/

and grab PIL together with the aggdraw extension
(while "core" PIL includes some drawing primitives,
last time I tried they weren't antialiased).

Best, BB



From horpner at yahoo.com  Wed Aug 15 11:47:55 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 15 Aug 2007 15:47:55 GMT
Subject: Opinions about this new Python book?
References: <mailman.1957.1187093157.22759.python-list@python.org>
	<1187096231.194685.86030@m37g2000prh.googlegroups.com>
	<20070814154913.D8C3C1E400A@bag.python.org>
	<8a6b8e350708141020q495b22der4c362ee3df618d82@mail.gmail.com>
	<mailman.1979.1187113641.22759.python-list@python.org>
	<1187117012.088495.247890@q4g2000prc.googlegroups.com>
	<1187191950.037749.8050@z24g2000prh.googlegroups.com>
Message-ID: <slrnfc6884.22k.horpner@FIAD06.norwich.edu>

On 2007-08-15, kyosohma at gmail.com <kyosohma at gmail.com> wrote:
> For some reason, the author makes the claim that the term
> "Predicate" is "bandied about quite a bit in the literature" of
> Python. I have 17 or so Python books and I don't think I've
> ever seen this used in conjunction with Python...or in any of
> the docs I've skimmed. What the!?

The document searching facility reveals that the term is bandied
about in five places in the standard documentation. These uses
seem approriate and uncontroversial to me.

These document functions accepting predicates as aruments:

6.5.1 Itertools functions
6.5.3 Recipes
11.47 Creating a new Distutils command
26.10.1 Types and members

The following provides a few predicate functions (weird! I'd have
never thought to look there for, e.g., ismodule):

6.7 operator -- Standard operators as functions

-- 
Neil Cerutti


From oliver at ootbc.com  Thu Aug 16 17:52:36 2007
From: oliver at ootbc.com (Oliver Nelson)
Date: Thu, 16 Aug 2007 14:52:36 -0700
Subject: Events in Com Object for Python
Message-ID: <DG3xi.1835$4w7.1312@newssvr22.news.prodigy.net>

I have MapPoint working in Python, and I'm trying to cancel events on 
the map, but I can't seem to make that happen.  I'm responding to the 
events successfully in my panel object.  My code is like this:

global MapPointMod
MapPointMod = 
win32com.client.gencache.EnsureModule("{51C0A9CA-F7B7-4F5A-96F4-43927C6FA50F}", 
0, 1, 0)

class MyPanel(wx.Panel):
     def __init__(self, *args, **kwds):
         # begin wxGlade: MyPanel.__init__
         kwds["style"] = wx.TAB_TRAVERSAL
         wx.Panel.__init__(self, *args, **kwds)
         self.frame = args[0]

         MyMap = MakeActiveXClass(MapPointMod.MappointControl, 
eventObj=self)
         self.window_1 = MyMap(self, -1)
         self.window_1.OpenMap("C:\\TEMP\\GPS_ON.ptt")
...
...
     def OnBeforeClick(self, Button, Shift, X, Y, Cancel):
         print "tada"


My event fires just fine, but I can't seem to figure out how to cancel 
the event so that mappoint doesn't do its stuff with it...I've tried 
setting Cancel based on the mappoint specs, but it doesn't seem to get 
sent back anywhere...

Any ideas please?

Thanx,

OLIVER


From hniksic at xemacs.org  Wed Aug 22 00:05:03 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 22 Aug 2007 06:05:03 +0200
Subject: File Read Cache - How to purge?
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
	<87veb9xb7y.fsf@mulj.homelinux.net>
	<slrnfcm1hv.4r1.nick@irishsea.home.craig-wood.com>
Message-ID: <87ir781afk.fsf@mulj.homelinux.net>

Nick Craig-Wood <nick at craig-wood.com> writes:

> If you are running linux > 2.6.18 then you can use
> /proc/sys/vm/drop_caches for exactly that purpose.
>
>   http://www.linuxinsight.com/proc_sys_vm_drop_caches.html

That URL claims that you need to run "sync" before dropping the cache,
and so do other resources.  I wonder if that means that dropping the
cache is unsafe on a running system.


From evan at yelp.com  Fri Aug 24 17:56:31 2007
From: evan at yelp.com (Evan Klitzke)
Date: Fri, 24 Aug 2007 14:56:31 -0700
Subject: Co-developers wanted: document markup language
In-Reply-To: <87odgyyx9u.fsf@wilson.homeunix.com>
References: <87odgyyx9u.fsf@wilson.homeunix.com>
Message-ID: <cfb58d850708241456o78891487s3bd032d585da0d89@mail.gmail.com>

On 8/23/07, Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
> Some LaTeX users in Aachen thought about a general-use markup
> language this spring.  I wrote some code and a rough project
> description, however, we could need some help.

Torsten,

I have another question about your markup language. Are there any
plans on adding provisions for layout and positioning? The difficulty
of learning advanced layout has been one of my major frustrations with
LaTeX (I'm referring to LaTeX's weird box system, I'm not sure exactly
what the proper terminology for it is).

-- 
Evan Klitzke <evan at yelp.com>


From danb_83 at yahoo.com  Thu Aug  9 19:52:05 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: Thu, 09 Aug 2007 16:52:05 -0700
Subject: beginner whitespace question
In-Reply-To: <1186703261.136506.208660@x35g2000prf.googlegroups.com>
References: <1186703261.136506.208660@x35g2000prf.googlegroups.com>
Message-ID: <1186703525.591462.122140@m37g2000prh.googlegroups.com>

On Aug 9, 6:47 pm, eggie5 <egg... at gmail.com> wrote:
> I keep getting an error for line 7, what's wrong with this?
>
> from django.db import models
>
> class Poll(models.Model):
>     question = models.CharField(max_length=200)
>     pub_date = models.DateTimeField('date published')
>
>         def __unicode__(self):
>                 return self.question
>

The "def" statements have to be at the same indentation level as
what's before it.



From bronger at physik.rwth-aachen.de  Thu Aug 23 18:16:21 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 24 Aug 2007 00:16:21 +0200
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com>
Message-ID: <87tzqpew22.fsf@wilson.homeunix.com>

Hall?chen!

Aahz writes:

> In article <87odgyyx9u.fsf at wilson.homeunix.com>,
> Torsten Bronger  <bronger at physik.rwth-aachen.de> wrote:
>
>> Some LaTeX users in Aachen thought about a general-use markup
>> language this spring.  I wrote some code and a rough project
>> description, however, we could need some help.
>
> http://docutils.sourceforge.net/

The provisional project page already points to
http://docutils.sourceforge.net/rst.html which is sufficient I
think.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From ricaraoz at gmail.com  Sun Aug  5 14:33:35 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sun, 05 Aug 2007 15:33:35 -0300
Subject: Formatting Results so that They Can be Nicely Imported into a
	Spreadsheet.
In-Reply-To: <cec.159aaa5b.33e6c987@aol.com>
References: <cec.159aaa5b.33e6c987@aol.com>
Message-ID: <46B617FF.40908@bigfoot.com>

Mensanator at aol.com wrote:
> In a message dated 8/4/2007 11:50:05 PM Central Daylight Time,
> ricaraoz at gmail.com writes:
> 
>     mensanator at aol.com wrote:
>     > On Aug 4, 6:35?pm, SMERSH009 <SMERSH0... at gmail.com> wrote:
>     >> Hi All.
>     >> Let's say I have some badly formatted text called doc:
>     >>
>     >> doc=
>     >> """
>     >> friendid
>     >> Female
>     >>
>     >>                             23 years old
>     >>
>     >>                             Los Gatos
>     >>
>     >>                             United States
>     >> friendid
>     >> Male
>     >>
>     >>                             24 years old
>     >>
>     >>                             San Francisco, California
>     >>
>     >>                             United States
>     >> """
>     >>
>     >> How would I get these results to be displayed in a format similar to:
>     >> friendid;Female;23 years old;Los Gatos;United States
>     >> friendid;Male; 24 years old;San Francisco, California;United States
>     >>
>     >> The latter is a lot easier to organize and can be quickly imported
>     >> into Excel's column format.
>     >>
>     >> Thanks Much,
>     >> Sam
>     >
>     > d = doc.split('\n')
>     >
>     > f = [i.split() for i in d if i]
>     >
>     > g = [' '.join(i) for i in f]
>     >
>     > rec = []
>     > temprec = []
>     > for i in g:
>     >     if i:
>     >         if i == 'friendid':
>     >             rec.append(temprec)
>     >             temprec = [i]
>     >         else:
>     >             temprec.append(i)
>     > rec.append(temprec)
>     >
>     > output = [';'.join(i) for i in rec if i]
>     >
>     > for i in output: print i
>     >
>     > ##    friendid;Female;23 years old;Los Gatos;United States
>     > ##    friendid;Male;24 years old;San Francisco, California;United
>     > States
>     >
> 
>     Also :
> 
>     docList = [ i.strip() for i in doc.split('\n') if i.strip()]
> 
>     lines = [i for i in xrange(len(docList)) if docList[i] ==
>     'friendid']+[len(docList)]
> 
>     docOut = ''
>     for k in [docList[lines[j]:lines[j+1]] for j in xrange(len(lines)-1)]:
>         docOut += '\n' + ';'.join(k)
> 
>     docOut = docOut[1:]    # Get rid of initial '\n'
> 
> Aren't you making an unwarranted assumption here?
> That doc ALWAYS starts with EXACTLY one blank line?

I guess you are referring to :
docList = [ i.strip() for i in doc.split('\n') if i.strip()]

Actually no, "doc.split('\n')" will split it a list member per line,
whether there are blank lines or not. Then "i.strip()" will take care of
redundant space, and "if i.strip()" will take care of blank lines. Try
it in your shell, play with "doc" and you'll see (I did try it without
the first blank line, and with a lot of blank lines and it's ok).

>  
> That's why I didn't use a list comprehension in that
> one section, to cover the possibility of any number
> (including none) of blank lines.

It works, didn't make a thorough testing but the cases you suggest were
tested.

>  
> By blindly coding [1:] you run the risk of data loss,
> and that's a poor example for the OP.

It is not "blindly". I guarantee the first byte will ALLWAYS be a '\n',
that's because I'm putting it there with "docOut += '\n' + ';'.join(k)"
(check the '\n' added at the beginning of each cycle), and I need to
strip the beginning '\n' which is not necessary.

Cheers

Ricardo




From laurent.pointal at limsi.fr  Fri Aug 17 07:44:16 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 17 Aug 2007 13:44:16 +0200
Subject: clarification
In-Reply-To: <fa41k8$10n$1@news2.u-psud.fr>
References: <aa405c1f0708162332t7b6dbdd6o2cc0f512dc821d7b@mail.gmail.com>
	<mailman.2107.1187350363.22759.python-list@python.org>
	<fa41k8$10n$1@news2.u-psud.fr>
Message-ID: <fa41mg$10n$2@news2.u-psud.fr>

Laurent Pointal a ?crit :

[cleaning]
fh = open('sheet1')
for line in fh:


From steve at holdenweb.com  Thu Aug  9 08:33:43 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Aug 2007 08:33:43 -0400
Subject: Help with Dictionaries and Classes requested please.
In-Reply-To: <46bb00d4$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>	<46baf183$0$433$426a74cc@news.free.fr>	<46baf384$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bb00d4$0$11943$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <f9f1j4$esj$1@sea.gmane.org>

special_dragonfly wrote:
> "special_dragonfly" <Dominic at PLEASEASK.co.uk> wrote in message 
> news:46baf384$0$11943$7b0f0fd3 at mistral.news.newnet.co.uk...
>> "Bruno Desthuilliers" <bruno.42.desthuilliers at wtf.websiteburo.oops.com> 
>> wrote in message news:46baf183$0$433$426a74cc at news.free.fr...
>>> special_dragonfly a ?crit :
>>> (snip)
>>>> I've managed to solve the problem, I really was just being a dunce. 
>>>> Here's how incase anyone is wondering:
>>>>
>>>> class MyClass:
>>>>     def __init__(self):
>>>>         name=""
>>>> dict={}
>>>> dict[0]=[]
>>>> dict[0].append(MyClass())
>>>> dict[0][0].name="Hello"
>>>> print dict[0][0].name
>>>>
>>>> I'm sorry if I've wasted anyones time, although if there's a better way 
>>>> of doing the above I'd still be interested to know.
>>> # unless you need pre 2.3.x compat, better to use newstyle classes
>>> class MyClass(object):
>>>   # use the initializer to initialize your instance
>>>   def __init__(self, name=''):
>>>     # the use of 'self' is mandatory, else you only have a local var
>>>     self.name = name
>>>
>>> # don't use builtin names as identifiers - unless you really want to
>>> # shadow the builtins
>>> d = {0:[MyClass('hello')}
>>> d[0].append(MyClass('goodbye'))
>>> d.setdefault(1, []).append(MyClass('Yo'))
>>> print d
>>>
>>> HTH
> 
> 
> Is there anyway for python to consider the values within a string when 
> entering the data into a dictionary. I know that isn't very clear so here's 
> an example:
> 
> class MyClass(object):
>     def __init__(self,name="",age=""):
>         self.name=name
>         self.age=age
> 
> data="Gary,50"
> d={0:[MyClass(data)]}
> data="Adam,25"
> d[0].append(MyClass(data))
> 
> The data is coming from a text file working on a line by line basis. I've 
> just tried and I'm just getting the full string in the first field. That 
> seems logical, now I don't want it to though!
> 
If you mean you would like to store a list of values then you could try 
something like

d = {0: MyClass(*data.split(",")}

to create the objects. The .split() method turns the string into a list 
of substrings, and the * unary operator turns that list into individual 
arguments passed to the __init__() method.

However, your recent question history indicates that you would do well 
to study the Python tutorial and other beginner material, as you will 
find many valuable hints as to Python best practices which will save you 
a lot of time.

Also there is the python-help at python.org list if you are having problems 
of a "beginner" nature, where you might get more practical help in your 
initial use of the language.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From rrs at researchut.com  Fri Aug 10 17:53:40 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Sat, 11 Aug 2007 03:23:40 +0530
Subject: Module imports during object instantiation
Message-ID: <4c3vo4-u7k.ln1@learner.hq.netapp.com>

Hi,

I've been very confused about why this doesn't work. I mean I don't see any
reason why this has been made not to work.

class Log:

    def __init__(self, verbose, lock = None):

        if verbose is True:
            self.VERBOSE = True
        else: self.VERBOSE = False


        if lock is None or lock != 1:
            self.DispLock = False
        else:
            self.DispLock = threading.Lock()
            self.lock = True

        if os.name == 'posix':
           self.platform = 'posix'
           self.color = get_colors()

        elif os.name in ['nt', 'dos']:
            self.platform = 'microsoft'
            
            try:
                import SomeModule
            except ImportError:
                self.Set_Flag = None
            
            if self.Set_Flag is not None:
                self.color = SomeModule.get_colors_windows()

        else:
            self.platform = None
            self.color = None

When I create an object the "import" part never gets executed. Is there a
reason behind it ?
I mean I'd like to keep my class as independent as I want. So that when
later I need to use it somewhere else, I don't need to know if it depends
on any modules.

Currently, the way I'm left is to globally go and import the module and set
a flag there.


Ritesh
-- 
If possible, Please CC me when replying. I'm not subscribed to the list.



From goldtech at worldpost.com  Fri Aug 31 19:54:02 2007
From: goldtech at worldpost.com (goldtech)
Date: Fri, 31 Aug 2007 16:54:02 -0700
Subject: Parameter Passing - String Variable Truncated ?
Message-ID: <1188604442.700651.94530@19g2000hsx.googlegroups.com>

Hi,

I'm passing what I think is a string parameter to another Python
program (spawn.py)  - see the code snip below. But only the counter
part gets printed to a log file via  spawn.py. Yet the echo print to
the output window shows the whole string with the fc part. Better
explained below I hope, there's the calling .py and the spawn
script .py:
...snip...
while fc:
    counter = counter + 1
    fc_cntr = str(counter) + ' : ' + fc
    print fc_cntr + '\n'  # Print to Pythonwin interactive window -
eg. "1 : New York" - all is printed OK

    arglist = []
    arglist.append(pythonPath)
    arglist.append(spawn_script)
    arglist.append(fc_cntr)  # This gets sent to the spawn_script but
only "1" gets printed

    os.spawnv(os.P_WAIT, pythonPath, arglist)
    fc = fcs.next()
...
--------------------------
## the spawn_script
import win32com.client, sys, os, time, re

in_featclass = sys.argv[1]
handle = open('C:\\log_file.txt', 'a')
handle.write(in_featclass + "\n") # ONLY the counter part gets printed
to the log file!    Why?
--------------------------

Thanks, for help.



From zentraders at gmail.com  Thu Aug 23 15:40:49 2007
From: zentraders at gmail.com (Zentrader)
Date: Thu, 23 Aug 2007 12:40:49 -0700
Subject: beginner, idiomatic python
In-Reply-To: <13cqlqbbpn0dmea@corp.supernews.com>
References: <13cqlqbbpn0dmea@corp.supernews.com>
Message-ID: <1187898049.734696.9500@l22g2000prc.googlegroups.com>

Does page count change? i.e. is it necessary to retrieve it in every
loop or
tempList = ['1','2','3','4','5','6','7','8']
sampleList=[]
page_count = self.parent.GetPageCount()
<snipped>
     for i in range(page_count):

Also, once pagefound is set to True, all pages following will not be
appended to sampleList because it is not initialized to False under
the "for i in range(self.parent.GetPageCount())" loop.

Finally, if I understand the logic and question correctly, you want
something like
tempList = ['1','2','3','4','5','6','7','8']
sampleList=[]
page_count = self.parent.GetPageCount()
for port in tempList:
    for i in range(page_count):
        page=self.parent.GetPage(i)
        if (hasattr(page, "port")) and (page.port != int(port)) :
            sampleList.append(port)

or perhaps (I'm not sure)
tempList = [1, 2, 3, 4, 5, 6, 7, 8]
sampleList=[]
page_count = self.parent.GetPageCount()
for i in range(page_count):
        page=self.parent.GetPage(i)
        if (hasattr(page, "port")) and (page.port not in tempList) :
            sampleList.append(port)
 HTH



From nytrokiss at gmail.com  Tue Aug 28 19:34:07 2007
From: nytrokiss at gmail.com (James Matthews)
Date: Tue, 28 Aug 2007 16:34:07 -0700
Subject: Gmane's been quiet ...
In-Reply-To: <1i3l2k9.1j3tdgr1iz19yeN%raims@dot.com>
References: <mailman.88.1188343014.28954.python-list@python.org>
	<1i3l2k9.1j3tdgr1iz19yeN%raims@dot.com>
Message-ID: <8a6b8e350708281634r3520430l4ffa86ebb94917de@mail.gmail.com>

Maybe they are sick of the spam!

On 8/28/07, Lawrence Oluyede <raims at dot.com> wrote:
>
> Steve Holden <steve at holdenweb.com> wrote:
> > ... so I was wondering if it's just me who hasn't seen any postings
> today?
>
> I think so, through my usenet server I saw the usual lot of postings
>
> --
> Lawrence, oluyede.org - neropercaso.it
> "It is difficult to get a man to understand
> something when his salary depends on not
> understanding it" - Upton Sinclair
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.goldwatches.com/
http://www.jewelerslounge.com
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From tjreedy at udel.edu  Thu Aug  2 12:58:05 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 2 Aug 2007 12:58:05 -0400
Subject: i am new to python-Please somebody help
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com><pan.2007.08.02.12.51.13.363293@REMOVE.THIS.cybersource.com.au>
	<1186063842.827016.95030@q3g2000prf.googlegroups.com>
Message-ID: <f8t2er$t5p$1@sea.gmane.org>


"gregarican" <greg.kujawa at gmail.com> wrote in message 
news:1186063842.827016.95030 at q3g2000prf.googlegroups.com...
| friendly than Python's. Your points are well-taken in how to properly
| post and how to do your own homework. Message correct. Delivery
| lacking...

Sorry, I saw nothing rude in Steven's straightforward and indeed polite 
suggestion.  Your post, however, ....

tjr





From arkanes at gmail.com  Fri Aug 10 08:43:10 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 10 Aug 2007 07:43:10 -0500
Subject: wxPython before MainLoop
In-Reply-To: <13bnh5bs4b9h427@corp.supernews.com>
References: <13bl9a75laqcm70@corp.supernews.com>
	<13bnh5bs4b9h427@corp.supernews.com>
Message-ID: <4866bea60708100543r3a18f7d3he38db8951a16cfeb@mail.gmail.com>

On 8/9/07, [david] <david at nospam.spam> wrote:
> I'm disappointed that I didn't get a wxPython solution.
>
> If the only way to get wxPython to correctly handle
> this simple task is to code around it, I don't think
> wxPython is really ready for Windows.
>

This sort of blathering is really just insulting. You don't know what
you're doing, but that doesn't mean that "wxPython isn't really ready
for Windows".

You can't interact with a window without an event loop running. This
is not (just) a wxPython limitation, it's intrinsic in guis in general
and in the windows platform in particular.

You need to do 2-step initialization, and you need to break it into
bits (or threads) that can operate independently of the event loop. If
you would like some suggestions as to how to do that in your
particular case, please feel free to post details on the wx-python
list, but leave your attitude at the door.


From kyosohma at gmail.com  Thu Aug 23 09:17:00 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 23 Aug 2007 06:17:00 -0700
Subject: How would I go about making a file open. Not the way you might
	think.
In-Reply-To: <mailman.159.1187857019.32294.python-list@python.org>
References: <eb79828c0708221959t18dd4024m251c1eac7732ec1f@mail.gmail.com>
	<mailman.159.1187857019.32294.python-list@python.org>
Message-ID: <1187875020.332095.324530@x35g2000prf.googlegroups.com>

On Aug 23, 2:09 am, "Hendrik van Rooyen" <m... at microcorp.co.za> wrote:
> Lamonte Harris  wrote:
> >Basically you can open a file by double clicking, and by default it would open
>
> w/ what every program you have it set >to.  Most text files would open in
> notepad.  How can I make a txt open so that notepad opens w/ the content in it
> by >using just python.
>
> I asked this question just yesterday - and Tim Golden answered:
>
> os.startfile()
>
> - Hendrik

Golden knows a lot. That's a good way to do it. I recommend it too!

Mike



From orsenthil at users.sourceforge.net  Wed Aug  1 11:15:12 2007
From: orsenthil at users.sourceforge.net (O.R.Senthil Kumaran)
Date: Wed, 1 Aug 2007 20:45:12 +0530
Subject: Problem with subprocess.Popen()
In-Reply-To: <1185959039.674882.210540@q75g2000hsh.googlegroups.com>
References: <1185959039.674882.210540@q75g2000hsh.googlegroups.com>
Message-ID: <20070801151511.GB3640@gmail.com>

> I'm trying to run a windows batch file from a python script using
> subprocess.popen().
> 
> The issue that I'm facing is that, if i give the batch file as
> parameter to the popen function, the script runs, but if i provide a
> parameter, it is not working.
> 
> The actual windows command to be executed is:
> 
> test.bat -t ABC_DE_FG_HI_001 "C:\ABCDEFGHIJKLMNOP.TXT"

do something like:
subprocess.Popen(r'test.bat -t ABC_DE_FG_HI_001
"C:\ABCDEFGHIJKLMNOP.TXT",shell=True)

This is same as doing os.system()

If even this results in any error (post back the error message) and try
setting the executable argument explicit.

subprocess.Popen(r'test.bat -t ABC_DE_001
"C:\ABCD.TXT",executable="test.bat",shell=True)


-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From Shawn at Milochik.com  Tue Aug 14 12:47:37 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Tue, 14 Aug 2007 12:47:37 -0400
Subject: Simple python iteration question
In-Reply-To: <1187108787.998690.37500@q3g2000prf.googlegroups.com>
References: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
	<1187108787.998690.37500@q3g2000prf.googlegroups.com>
Message-ID: <2dc0c81b0708140947s6542b68aw7e1fa8a3d22978e2@mail.gmail.com>

<snip>
> this will get index and item at index,
>
> for i in range(0, len(l)):
>     print i
>     print l[i]
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


Enumerate is better here -- it provides the same result and that's
what it's for. However, if you do use range, the zero is unnecessary
-- beginning at zero is the default.


From bronger at physik.rwth-aachen.de  Thu Aug 16 01:47:14 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 16 Aug 2007 07:47:14 +0200
Subject: ElementTree surprise
References: <7xd4xoxf16.fsf@ruckus.brouhaha.com>
Message-ID: <87bqd89gkd.fsf@wilson.homeunix.com>

Hall?chen!

Paul Rubin writes:

> I have a doc with a bunch of fields like:
>
>     <foo bar="spam">stuff</foo>
>     <foo bar="penguin">other stuff</foo>
>
> and sometimes
>
>     <foo bar="parrot"></foo>
>
> I use ElementTree to parse the doc and I use the .text attribute
> to get "stuff" or "other stuff" in the spam and penguin examples.
>
> I'd expect .text to be the empty string in the parrot example, but
> instead it is None.

Technically, text is nodes as all other element nodes.  In the
parrot example, there is no empty textnode but no textnode at all.

> I can fix my script to deal with this, but it's surprising.  Is it
> intentional?  I could understand it being None if the doc had said
>
>    <foo bar="parrot"/>
>
> but that is different.

<foo bar="parrot"/> and <foo bar="parrot"></foo> are mapped to the
same thing by any XML parser, and I think it wouldn't be standards
conforming if an XML parser would pass this difference to a caller.

> Disclaimer: I'm not even slightly an XML expert, I just find myself
> having to deal with a lot of it.

I think the question is how XMLish the access via ElementTree should
be.  While it is in principle correct that there is no text node in
parrot, it may be sensible to set it to "" for practical reasons.
As far as I can see, there is no empty text node in XML, so no
ambiguity would occur.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From cajnnjonaj at fjireanjtjprodjuctijons.com  Mon Aug 20 09:48:07 2007
From: cajnnjonaj at fjireanjtjprodjuctijons.com (Aaron)
Date: Mon, 20 Aug 2007 08:48:07 -0500
Subject: yet another indentation proposal
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
	<13ci0oesdtlh871@corp.supernews.com>
	<_49yi.9351$3x.6614@newssvr25.news.prodigy.net>
	<1187589173.410862.132580@o80g2000hse.googlegroups.com>
Message-ID: <D_gyi.6547$sH3.154@fe091.usenetserver.com>

"Michael Tobis" <mtobis at gmail.com> wrote in message 
news:1187589173.410862.132580 at o80g2000hse.googlegroups.com...
>
> Alternatively, you might also consider writing a simple pre and
> postprocessor so that you could read and write python the way you
> would prefer
>
> In that you could cope with the existing code base and the existing
> compiler could cope with code you write.
>
> mt
>


Hi.

That's probably what I'll end up doing.  The only drawback to that is that 
it solves the problem for me only.  Perhaps I will open source the scripts 
and write up some documentation so that other folks in a similar situation 
don't have to reinvent the wheel.  The only unfortunate aspect to that is 
that blind newbies to the language will have to figure out setting up a 
shell script or batch file to pipe the output of the filter into Python on 
top of learning the language.  I admit, it's probably not that much work, 
but it is one more stumblingblock that blind newcomers will have to 
overcome.

Aaron 





From dejanews at email.com  Wed Aug 15 07:40:24 2007
From: dejanews at email.com (samwyse)
Date: Wed, 15 Aug 2007 06:40:24 -0500
Subject: wxPython before MainLoop
In-Reply-To: <mailman.1843.1186775191.22759.python-list@python.org>
References: <13bl9a75laqcm70@corp.supernews.com>	<6a6dnfbbFJNzcCbbnZ2dnUVZ_oudnZ2d@comcast.com>
	<mailman.1843.1186775191.22759.python-list@python.org>
Message-ID: <ADBwi.1237$%Y7.624@nlpi069.nbdc.sbc.com>

Chris Mellon wrote:
> On 8/9/07, Heikki Toivonen <heikki at osafoundation.org> wrote:
> 
>>[david] wrote:
>>
>>>I'd like to refresh the display before I start the main loop.

If your window isn't able to interact with the user, then I'd consider 
it a splash screen, no matter if it does look exactly like your main 
application interface.

>>We have this kind of situation in Chandler, where we display and update
>>the splash screen before we enter MainLoop.
>>
[...]
>>3. The splash screen refresh is basically: draw new stuff,
>>self.Layout(), self.Update(), wx.Yield()
>>http://lxr.osafoundation.org/source/chandler/application/Application.py#1421

Looking at the Chandler code suggests a solution to [david]'s original 
problem.  It is possible that, on Windows only, he may need to call 
Update to finish painting the display.

1432         self.Layout()
1433         if wx.Platform == '__WXMSW__':
1434             self.Update()
1435         wx.GetApp().Yield(True)

> wxYield spins the event loop in place. This can have some serious
> consequences if you aren't very careful with your usage, like
> recursively entering event handlers. I generally consider it an
> experts only interface, and avoid it.

I'll confess to being one of those old-school programmers who, back in 
the day, wrote his code around big select loops instead of using 
threads, but I'm intriged by the "experts only" designation.  Can 
someone explain further?  Thanks!


From stefan.behnel-n05pAM at web.de  Wed Aug  1 03:50:58 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 01 Aug 2007 09:50:58 +0200
Subject: Iteration over strings
In-Reply-To: <mailman.1378.1185905291.22759.python-list@python.org>
References: <496954360707311055i1cd7d1begb6b84d11c668f6fa@mail.gmail.com>
	<mailman.1378.1185905291.22759.python-list@python.org>
Message-ID: <46B03B62.4080002@web.de>

> Robert Dailey wrote:
>> I have the following code:
>>
>> str = "C:/somepath/folder/file.txt"
>>
>> for char in str:
>>     if char == "\\":
>>         char = "/"
>>
>> The above doesn't modify the variable 'str' directly. I'm still pretty new
>> to Python so if someone could explain to me why this isn't working and what
>> I can do to achieve the same effect I would greatly appreciate it.

I assume what you are actually looking for is the os.path module.

http://docs.python.org/lib/module-os.path.html

Especially the normpath() function should be of interest.

Stefan


From whamil1 at entergy.com  Mon Aug  6 14:14:50 2007
From: whamil1 at entergy.com (Hamilton, William )
Date: Mon, 6 Aug 2007 13:14:50 -0500
Subject: Something in the function tutorial confused me.
In-Reply-To: <1186422680.103021.105230@l70g2000hse.googlegroups.com>
Message-ID: <588D53831C701746A2DF46E365C018CE01D2CB00@LITEXETSP001.etrsouth.corp.entergy.com>

> From: Lee Fleming
> On Aug 6, 12:30 pm, "Hamilton, William " <wham... at entergy.com> wrote:
> > When you call f(23), the variable y within it gets created and
points at
> > None.  When f(23) exits, the y that it created gets destroyed.
(Well,
> > goes out of scope, but even if it's not garbage collected it won't
ever
> > come back into scope.)  When you then call f(24), a new y is created
> > that also points to None, and disappears forever when f(24) exits.
> >
> > The values in a def statement are created when the def is executed,
but
> > the variables are only created when the function is actually called,
and
> > new ones are created every time the function is called.
> >
> > --
> > -Bill Hamilton- Hide quoted text -
> >
> > - Show quoted text -
> 
> why isn't the y in def f (x, y = []): something
> garbage-collected?
> 

The y is garbage-collected.  However, the [] in the def statement is
not.  The list is created when the statement is evaluated.  Every time
that f() is called with a default value, the new y created will point to
the same list.  If that list is mutated into [23], it will still be [23]
the next time f() is called, and the new y created in that call will
point at the same list (now [23]) that the (now destroyed) y pointed to
in the first call.

--
-Bill Hamilton


From uymqlp502 at sneakemail.com  Fri Aug 31 15:48:41 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Fri, 31 Aug 2007 12:48:41 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <slrnfdg413.1e8.horpner@FIAD06.norwich.edu>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<slrnfdg413.1e8.horpner@FIAD06.norwich.edu>
Message-ID: <1188589721.367781.322150@z24g2000prh.googlegroups.com>


Neil Cerutti wrote:

> Who watches the watchmen? The contracts are composed by the
> programmers writing the code. Is it likely that the same person
> who wrote a buggy function will know the right contract?

The idea here is that errors in the self-testing code are unlikely to
be correlated with
errors in the primary code. Hence, you get a sort of multiplying
effect on reliability. For
example, if the chance of error in the primary code and the self-test
code are each 0.01,
the chance of an undetected error is approximately 0.01^2 or 0.0001.



From ars at iki.fi  Thu Aug  2 07:05:47 2007
From: ars at iki.fi (Antti Rasinen)
Date: Thu, 2 Aug 2007 14:05:47 +0300
Subject: Use variable in regular expression
In-Reply-To: <1186051401.122847.114690@d55g2000hsg.googlegroups.com>
References: <1186051401.122847.114690@d55g2000hsg.googlegroups.com>
Message-ID: <277962F2-5F20-4CEF-BD66-643433426182@iki.fi>


On 2007-08-02, at 13:43, CarpeSkium at gmail.com wrote:

> I know I can use a variable in regular expressions. I want to use a
> regex to find something based on the beginning of the string. I am
> using yesterday's date to find all of my data from yesterday.
> Yesterday's date is 20070731, and assigned to the variable
> "yesterday_date". I want to loop thru a directory and find all of the
> yesterday's data ONLY IF the feature class has the date at the
> BEGINNING of the filename.
>

> ...

> I don't want the one's that start with "Copy". I can't figure out the
> syntax of inserting the "^" into the regex. I've tried all of the
> following, with no luck:
>
> re.compile(^yesterday_date)
> re.compile(r'^yesterday_date')
> re.compile(r'^[yesterday_date]')
> re.compile(r'[^yesterday_date]')

The first one is a syntax error (^ outside a string means the xor- 
operation). The rest are just strings containing the _string_  
'yesterday_date' and not the value of the variable. So you need to do  
some string formatting(*

search_str = '^%s' % yesterday_date # I'm assuming yesterday_date is  
a string.
re.compile(search_str)

*) http://docs.python.org/lib/typesseq-strings.html

-- 
[ ars at iki.fi <*> Antti Rasinen ]

This drone-vessel speaks with the voice and authority of the Ur-Quan.



From nguyenhuuthanh at gmail.com  Fri Aug 24 23:04:12 2007
From: nguyenhuuthanh at gmail.com (Genie T)
Date: Sat, 25 Aug 2007 03:04:12 -0000
Subject: Running daemon with zdaemon ... example help?
Message-ID: <1188011052.347321.211890@r23g2000prd.googlegroups.com>

Hi all,

I'm looking at zdaemon to run my python scripts as a daemon but it
seems to have few example that guide me how to follow. It would be
great if you can give me a simple example of how to use. I'm newbie
here :)

Thanks



From kyosohma at gmail.com  Tue Aug  7 12:15:52 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 07 Aug 2007 09:15:52 -0700
Subject: python system subprocess win32
In-Reply-To: <f9a5c8$mvd$1@gemini.csx.cam.ac.uk>
References: <f9a0on$dee$1@gemini.csx.cam.ac.uk>
	<1186500091.063514.178640@e9g2000prf.googlegroups.com>
	<f9a5c8$mvd$1@gemini.csx.cam.ac.uk>
Message-ID: <1186503352.062314.89170@x35g2000prf.googlegroups.com>

On Aug 7, 11:07 am, "mclaugb" <mcla... at nospm.yahoo.com> wrote:
> At the moment, I cannot figure a way of running this precompiled "conv.exe"
> using commandline arguments.
>
> Thus, I need Python to call the program, wait until it loads up, then enter
> a known sequence of characters so that the function will run.
> The program conv.exe I call looks like this.
> --------------------------
> Welcome to conv.exe
> This program was written by ....
>
> Please select from the following options: h- (help) r- (read) ...etc
> Enter your request:
> ---------------------------------
> I need Python to start the program, wait a second and then issue a few
> characters to the program.
>
> Hope this makes more sense!
> Bryan
>
> <kyoso... at gmail.com> wrote in message
>
> news:1186500091.063514.178640 at e9g2000prf.googlegroups.com...
>
> > On Aug 7, 9:48 am, "mclaugb" <mcla... at nospm.yahoo.com> wrote:
> >> Hello ALl,
> >> I have a compiled program "conv.exe" that works as follows:>>conv.exe
>
> >> -----------------------------
> >> Please selection from the following options.  press "h" for help, "p" for
> >> print, "r" for readfile.
> >> Enter your request now:
> >> ...
> >> --------------------
> >> Is there a way to script python using the subprocess method to start this
> >> program "conv.exe" and then send a "r" to the command line to make it,
> >> say,
> >> readfile.
>
> >> I have tried the following but the .communicate("r) is not doing anything
>
> >> import subprocess
> >> import time
>
> >> a=subprocess.Popen("c:\\mcml\\conv.exe")
> >> time.sleep(1)
> >> (stdout, stderr) = a.communicate("r")
>
> >> Many thanks,
> >> Bryan
>
> > Use the sys.argv method. In the code that you have compiled, put the
> > following lines in:
>
> > <code>
>
> > import sys
> > default = sys.argv[1]
> > if default:
> >   # check which option it is and run it appropriately
> > else:
> >   # print your menu here
>
> > </code>
>
> > Then you should be able to do the subprocess Popen command:
>
> > subprocess.Popen("c:\\mcml\\conv.exe r")
>
> > You may need to turn the shell on...
>
> > subprocess.Popen("c:\\mcml\\conv.exe r", shell=True)
>
> > Hopefully that gives you some ideas anyway.
>
> > Mike

Oh. I thought you had compiled the program yourself. I suppose you
could use SendKeys then. I have a couple links here:

http://pythonlibrary.org/python/SendKeys

It's pretty hackneyed, but I've used the SendKeys module to automate
Firefox to some degree.

Mike



From tjreedy at udel.edu  Fri Aug 31 02:28:36 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 31 Aug 2007 02:28:36 -0400
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com><87hcmhebwv.fsf@benfinney.id.au>
	<5jn9qgFdmbcU3@mid.uni-berlin.de>
Message-ID: <fb8cf7$cre$1@sea.gmane.org>


"Marc 'BlackJack' Rintsch" <bj_666 at gmx.net> wrote in message 
news:5jn9qgFdmbcU3 at mid.uni-berlin.de...
| On Thu, 30 Aug 2007 17:09:36 +1000, Ben Finney wrote:
|
| > zzbbaadd at aol.com writes:
| >
| >> What's with the index() function of lists throwing an exception on not
| >> found?
| >
| > It's letting you know that the item isn't in the list. There's no
| > sensible return value from an "index" function in that condition.
|
| What about -1?  C programmers do this all the time.  :-)

Because they do not have exceptions. 





From ldo at geek-central.gen.new_zealand  Wed Aug 29 04:36:17 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Wed, 29 Aug 2007 20:36:17 +1200
Subject: Jython 2.2 on Ubuntu
References: <-YOdnW_k3p6Fy0nb4p2dnAA@bt.com>
Message-ID: <fb3b1d$v9m$2@lust.ihug.co.nz>

In message <-YOdnW_k3p6Fy0nb4p2dnAA at bt.com>, Neil Wallace wrote:

> I have used the
> GUI installer of Jython 2.2, and installed it to the default
> /root/jython2.2 directory.

You do realize that /root is the home directory of the root user, normally
off-limits to normal users?

Usually if you're installing your own packages, you would put them
in /usr/local or /opt.



From horpner at yahoo.com  Mon Aug  6 07:27:28 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 06 Aug 2007 11:27:28 GMT
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
Message-ID: <slrnfbe1jd.1so.horpner@FIAD06.norwich.edu>

On 2007-08-06, Neil Cerutti <horpner at yahoo.com> wrote:
> On 2007-08-06, Lee Fleming <countblabula at yahoo.com> wrote:
>> def  f(x, y=None):
>>     if y is None: y = []
>>     y.append(x)
>>     return y
>
> >>> f(f(23))
>  [23, 42]

Sorry. That should've been:

  >>> f(42, f(23))
  [23, 42]

-- 
Neil Cerutti
Scouts are saving aluminum cans, bottles, and other items to be recycled.
Proceeds will be used to cripple children. --Church Bulletin Blooper


From rcdailey at gmail.com  Mon Aug 20 14:16:50 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 20 Aug 2007 13:16:50 -0500
Subject: str().join() isn't working
In-Reply-To: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com>
References: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com>
Message-ID: <496954360708201116x5507358cr2f81710a62f2403e@mail.gmail.com>

here is a more realized example of the lists I'm trying to join:


_user_includes = [
	"../src",
	"../resource",
	"../inc",
	"../src",
	"../data",
	"../gui",
	"../script",
	"../script/actions",
	"../gui/dispatch",
	"../gui/factories",
	"../gui/frames",
	"../gui/getters",
	"../gui/localization",
	"../gui/player",
	"../gui/setters",
	"../gui/utilities",
	"../sis",
	"../player",
	"../platform/ngi",
	"../../engine",
	"../../engine/audio/NGI",
	"../../engine/io",
	"../../engine/io\NGI",
	"../../engine/math",
	"../../engine/math/fixed",
	"../../engine/path/NGI",
	"../../engine/text/NGI",
	"../../engine/mem",
	"../../engine/text",
	"../../engine/observer",
	"../../sdk/tiny_xml",
	"../../sdk/zlib",
	"../../sdk/lpng",
	"../../sdk/IFDLib/Source/Precompile",
	"../../sdk/IFDLib/Source/CoreLib",
	"../../sdk/IFDLib/inc",
	"../../sdk/IFDLib/Source/UtilLib",
	"../../sdk/IFDLib/Source/GameLib",
	"../../sdk/IFDlib/Source/OSLib/_NGI",
	"../../sdk/stl-port/NGI",
	"../../sdk/mini-boost/NGI",
	"../../sdk/mini-boost/COMMON",
	]

_system_includes = [
	"../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include",
	"../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include/osextensions/rga",
	"../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include/osextensions/stdapis",
	"../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include/osextensions/stdapis/stlport",
	"../../../../../../Symbian/9.1/NGAGE_SDK_1.1/epoc32/include/variant"
	]





On 8/20/07, Robert Dailey <rcdailey at gmail.com> wrote:
> Hi,
>
> First have a look at the following code:
>
>
> In main.py:
> -----------------------------------------------------------------------------------
>     space = " "
>
>     includes = space.join ( system._user_includes ) + " " + space.join(
> system._system_includes )
>
>
> In system.py:
> -----------------------------------------------------------------------------------
> _user_includes = [
>     ]
>
> _system_includes = [
>     ]
>
>
> The above does not work. The interpreter states: "TypeError: sequence item
> 0: expected string, list found". I'm not sure what this means. Can anyone
> help me figure out what I'm doing wrong? Thanks.
>
> PS: I've also tried putting strings in the lists above just to make sure
> that them being empty wasn't the problem. I got no different results.
>


From ptmcg at austin.rr.com  Wed Aug 22 12:19:47 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 22 Aug 2007 09:19:47 -0700
Subject: Eval and raw string ??
In-Reply-To: <1187798806.029598.264740@q3g2000prf.googlegroups.com>
References: <1187798806.029598.264740@q3g2000prf.googlegroups.com>
Message-ID: <1187799587.101535.7530@x35g2000prf.googlegroups.com>

On Aug 22, 11:06 am, Mark <cree... at gmail.com> wrote:
> Eval() doesn't seem to recognize the r'string' format. Is there a way
> around this.
> Example:
> If I input: ---------> eval("r'C:\tklll\ndfd\bll'")
> I get the output:
>
> Traceback (most recent call last):
>   File "<pyshell#3>", line 1, in <module>
>     eval("r'C:\tklll\ndfd\bll'")
>   File "<string>", line 1
>     r'C:        klll
>             ^
> SyntaxError: EOL while scanning single-quoted string
>
> The same principle applies for exec.
>
> Thanks in advance,
> Mark

This is not a raw string: "r'\tsomething in quotes'".  It is a string
starting with an "r", a "'", a tab, and and "s".

This is a raw string: r'\tsomething in quotes'.  It is a string
starting with a "\", a "t" and an "s".

Notice that the \t and \n in c:\tkllll\ndfd\bll were treated like tab
and newline?  Try eval(r'c:\tkllll\ndfd\bll')

(You will get a different error now, but it wont be a raw string
problem.)

-- Paul




From kyosohma at gmail.com  Fri Aug  3 16:06:50 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 03 Aug 2007 13:06:50 -0700
Subject: os.listdir path error
In-Reply-To: <1186170609.001778.15230@l70g2000hse.googlegroups.com>
References: <1186170609.001778.15230@l70g2000hse.googlegroups.com>
Message-ID: <1186171610.333624.103640@e9g2000prf.googlegroups.com>

On Aug 3, 2:50 pm, vedrandeko... at v-programs.com wrote:
> Hello
>
> Here is my simple listdir example:
>
> >>> import os
> >>> os.listdir("C:\Python24\") # This directory relly exists
>
> Here is my error:
>
> WindowsError: [Errno 3] The system cannot find the path specified: 'l/
> *.*'
>
> Regards,
> Vedran

I get "SyntaxError: EOL while scanning single-quoted string", which is
what should happen when you escape the double-quotes at the end. Not
sure how you're getting that WindowsErrors.

If I do  os.listdir('c:\python24')  instead, it works fine.

Mike



From rdm at rcblue.com  Sun Aug 12 18:30:02 2007
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 12 Aug 2007 15:30:02 -0700
Subject: A dumb question about a class
In-Reply-To: <TqSdnWYzVdWvGCLbnZ2dnUVZ_saknZ2d@comcast.com>
References: <mailman.1887.1186955369.22759.python-list@python.org>
	<TqSdnWYzVdWvGCLbnZ2dnUVZ_saknZ2d@comcast.com>
Message-ID: <20070812223007.15D161E400B@bag.python.org>

At 03:09 PM 8/12/2007, Steven Bethard wrote:

>Here's how I'd write the recipe::
>
>      import itertools
>
>      def iter_primes():
>          # an iterator of all numbers between 2 and +infinity
>          numbers = itertools.count(2)
>
>          # generate primes forever
>          while True:
>
>              # get the first number from the iterator (always a prime)
>              prime = numbers.next()
>              yield prime
>
>              # remove all numbers from the (infinite) iterator that are
>              # divisible by the prime we just generated
>              numbers = itertools.ifilter(prime.__rmod__, numbers)
>
>
>      class PrimeList(object):
>          def __init__(self):
>              # infinite iterator of primes
>              self._prime_iter = iter_primes()
>
>              # the last prime we've seen
>              self._last_prime = None
>
>              # all primes seen so far
>              self._prime_set = set()
>
>              # add the first prime (so that _last_prime is set)
>              self._add_prime()
>
>          def __contains__(self, n):
>              # add primes to the list until we exceed n
>              while n > self._last_prime:
>                  self._add_prime()
>
>              # return True if n is one of our primes
>              return n in self._prime_set
>
>          def _add_prime(self):
>              # take a prime off the iterator and update the prime set
>              self._last_prime = self._prime_iter.next()
>              self._prime_set.add(self._last_prime)

I'm afraid my next question is "How do I run this"?

Dick




From DustanGroups at gmail.com  Sat Aug 11 08:26:12 2007
From: DustanGroups at gmail.com (Dustan)
Date: Sat, 11 Aug 2007 12:26:12 -0000
Subject: Deleting objects on the fly
In-Reply-To: <mailman.1842.1186771794.22759.python-list@python.org>
References: <1186705500.227658.163170@q3g2000prf.googlegroups.com>
	<46BC35F2.4070600@metavr.com>
	<mailman.1842.1186771794.22759.python-list@python.org>
Message-ID: <1186835172.396997.210710@d55g2000hsg.googlegroups.com>

On Aug 10, 1:49 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Campbell Barton" <cbar... at metavr.com> wrote in message
>
> news:46BC35F2.4070600 at metavr.com...| Michele Simionato wrote:
>
> | > Probably not, 'del x' just decrements the reference count,
>
> Or ashttp://docs.python.org/ref/del.html
> puts it, " Deletion of a name removes the binding of that name from the
> local or global namespace,"
>
> | del x will remove x from memory if nothing else is refering to it,
>
> This is implementation dependent: true for CPython, not for Jython, ??? for
> IronPython.

Wait a second; do you mean to say that in Jython, del x will never
remove x from memory? How do you free up RAM?



From byte8bits at gmail.com  Tue Aug 14 09:18:37 2007
From: byte8bits at gmail.com (brad)
Date: Tue, 14 Aug 2007 09:18:37 -0400
Subject: Assignments and Variable Substitution
In-Reply-To: <mailman.1947.1187053596.22759.python-list@python.org>
References: <f9q2qn$i4v$1@solaris.cc.vt.edu>	<cfb58d850708131223y37ccb61y465fc2f964ad05e4@mail.gmail.com>
	<mailman.1947.1187053596.22759.python-list@python.org>
Message-ID: <f9sa6b$4pc$1@solaris.cc.vt.edu>

Steve Holden wrote:
> Evan Klitzke wrote:
>> On 8/13/07, brad <byte8bits at gmail.com> wrote:
>>> I'd like to do something like this:
>>>
>>> var = '123'
>>> %s = [], %var
>>>
>>> So that, in the end, var is '123' and an empty list is named '123' as
>>> well. The list assignments are created during a loop.
>>
>> You can't assign a variable whose name is 123, but you can do this
>> sort of thing with setattr.
>>
> And why would you want a variable whose name is '123'?

Just an example.


From carsten at uniqsys.com  Thu Aug 30 21:15:27 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 30 Aug 2007 21:15:27 -0400
Subject: list index()
In-Reply-To: <fb7osg$jb7$2@lust.ihug.co.nz>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<1188496588.750629.208100@g4g2000hsf.googlegroups.com>
	<mailman.154.1188497511.28954.python-list@python.org>
	<1188498073.997168.282420@q5g2000prf.googlegroups.com>
	<mailman.158.1188499243.28954.python-list@python.org>
	<fb7osg$jb7$2@lust.ihug.co.nz>
Message-ID: <1188522927.3258.15.camel@localhost.localdomain>

On Fri, 2007-08-31 at 12:57 +1200, Lawrence D'Oliveiro wrote:
> In message <mailman.158.1188499243.28954.python-list at python.org>, Steve
> Holden wrote:
> 
> > But why would you want to ignore built-in support like "value in dict"?
> 
> Because a function can be passed as a value in its own right, a built-in
> construct cannot.

...and that's why we have operator.contains():

>>> import operator
>>> help(operator.contains)
Help on built-in function contains in module operator:

contains(...)
    contains(a, b) -- Same as b in a (note reversed operands).

-- 
Carsten Haese
http://informixdb.sourceforge.net




From gnewsg at gmail.com  Tue Aug 28 13:55:59 2007
From: gnewsg at gmail.com (billiejoex)
Date: Tue, 28 Aug 2007 10:55:59 -0700
Subject: tempfile.mkstemp and os.fdopen
Message-ID: <1188323759.955043.317630@19g2000hsx.googlegroups.com>

Hi there.
I'm trying to generate a brand new file with a unique name by using
tempfile.mkstemp().
In conjunction I used os.fdopen() to get a wrapper around file
properties (write & read methods, and so on...) but 'name' attribute
does not contain the correct file name. Why?

>>> import os
>>> import tempfile
>>> fileno, name = tempfile.mkstemp(prefix='ftpd.', dir=os.getcwd())
>>> fd = os.fdopen(fileno, 'wb')
>>> fd.name
<fdopen>

Moreover, I'd like to know if I'm doing fine. Does this approach avoid
race conditions or other types of security problems?

Thanks in advance



From Dominic at PLEASEASK.co.uk  Thu Aug  9 04:40:03 2007
From: Dominic at PLEASEASK.co.uk (special_dragonfly)
Date: Thu, 9 Aug 2007 09:40:03 +0100
Subject: Help with Dictionaries and Classes requested please.
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>


"special_dragonfly" <Dominic at PLEASEASK.co.uk> wrote in message 
news:46bacae3$0$89254$7b0f0fd3 at mistral.news.newnet.co.uk...
> Hello,
> I'm new to this group, I've read through the subject of a lot of the group
> but can't find anything relevant. Perhaps my question is too basic but I'm
> still stuck.
> Classes and Dictionaries.
> If I have a dictionary, how do I instantiate many instances of a class per
> dictionary key? Either at run-time or dynamically.
> Can anyone help me please?
> Thank you
> Dominic
>
>

I've managed to solve the problem, I really was just being a dunce. Here's 
how incase anyone is wondering:

class MyClass:
    def __init__(self):
        name=""
dict={}
dict[0]=[]
dict[0].append(MyClass())
dict[0][0].name="Hello"
print dict[0][0].name

I'm sorry if I've wasted anyones time, although if there's a better way of 
doing the above I'd still be interested to know.
Dominic




From chrispwd at gmail.com  Sun Aug  5 14:10:13 2007
From: chrispwd at gmail.com (chrispwd at gmail.com)
Date: Sun, 05 Aug 2007 11:10:13 -0700
Subject: Buffering HTML as HTMLParser reads it?
In-Reply-To: <1185998888.811319.15150@l70g2000hse.googlegroups.com>
References: <1185993078.651180.298620@19g2000hsx.googlegroups.com>
	<1185998888.811319.15150@l70g2000hse.googlegroups.com>
Message-ID: <1186337413.343863.257890@g4g2000hsf.googlegroups.com>

On Aug 1, 4:08 pm, Paul McGuire <pt... at austin.rr.com> wrote:
> On Aug 1, 1:31 pm, chris... at gmail.com wrote:
> <snip>
>
>
>
> > I'm thinking maybe somehow haveHTMLParserappend each character it
> > reads except for data inside tags in some kind of buffer? This way I
> > can have the HTML contents read into a buffer, then when I do my own
> > handle_ overrides, I can also append to that buffer with the
> > transformed data. Once the HTML page is finished parsing, ideally I
> > would be able to print the contents of the buffer and the HTML would
> > be identical except for the string transformations.
>
> > I also need to make sure that all newlines, tags, spacing, etc are
> > kept in tact -- this part is a requirement for other reasons.
>
> > Thanks!
>
> What you describe is almost exactly how pyparsing implements
> transformString.  See below:
>
> from pyparsing import *
>
> boldStart,boldEnd = makeHTMLTags("B")
>
> # convert <B> to <div class="bold"> and </B> to </div>
> boldStart.setParseAction(replaceWith('<div class="emphatic">'))
> boldEnd.setParseAction(replaceWith('</div>'))
> converter = boldStart | boldEnd
>
> html = "Display this in <b>bold</b>"
> print converter.transformString(html)
>
> Prints:
>
> Display this in <div class="emphatic">bold</div>
>
> All text not matched by a pattern in the converter is left as-is.  (My
> CSS style/form may not be up to date, but I hope you get the idea.)
>
> -- Paul

Hello,

Sorry for the delay in reply, and that you for the info. Though, I
think either I am mis-understanding your post or its not the solution
I'm looking for.

How does this fit into what I'm looking to do with HTMLParser?

Thanks!



From philippe.martin at att.net  Mon Aug 27 00:58:12 2007
From: philippe.martin at att.net (hg)
Date: Mon, 27 Aug 2007 04:58:12 GMT
Subject: ANN: SCF released GPL
In-Reply-To: <7x3ay5d1mn.fsf@ruckus.brouhaha.com>
References: <2qnAi.21495$eY.19028@newssvr13.news.prodigy.net>
	<7x3ay5d1mn.fsf@ruckus.brouhaha.com>
Message-ID: <ERsAi.47759$Um6.7114@newssvr12.news.prodigy.net>

Paul Rubin wrote:
> hg <hg at nospam.org> writes:
>> I am looking for a free subversion server resource to put the code
>> ... if you know of any.
> 
> Does it have to be SVN?  I think Savannah and Sourceforge both still
> use CVS.  I'm not sure what Launchpad uses.  I guess if necessary I
> could set up a subversion repo for you on a server that I use.  I've
> been wanting to put together some GNU security tools under the name
> Fort GNOX, so maybe this can be a start.

Nope CVS would be fine ... I guess I've made the switch in my head.

I'll check SourceForge.

Thanks.

hg




From zyzhu2000 at gmail.com  Wed Aug  1 12:11:37 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Wed, 01 Aug 2007 16:11:37 -0000
Subject: Awkward format string
Message-ID: <1185984697.605529.157110@g12g2000prg.googlegroups.com>

Hi,

In order to print out the contents of a list, sometimes I have to use
very awkward constructions. For example, I have to convert the
datetime.datetime type to string first, construct a new list, and then
send it to print. The following is an example.

	x=(e[0].strftime("%Y-%m-%d"), e[1].strftime("%Y-%m-%d"))+e[2:]
	print  >>f, "%s\t%s\t%d\t%f\t%f\t%f\t%d" % x

e is a tuple. x is my new tuple.

Does anyone know better ways of handling this?

Thanks,
Geoffrey



From paul at boddie.org.uk  Wed Aug  8 12:08:40 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 08 Aug 2007 09:08:40 -0700
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <1186583168.447608.114040@d55g2000hsg.googlegroups.com>
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
	<1186583168.447608.114040@d55g2000hsg.googlegroups.com>
Message-ID: <1186589320.335950.142880@b79g2000hse.googlegroups.com>

On 8 Aug, 16:26, Istvan Albert <istvan.alb... at gmail.com> wrote:
> On Aug 6, 6:11 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>
> > Why on earth did they make this change?  It just seems gratuitous.
>
> Having print a function (with parameters) makes is very easy to modify
> where the output goes.

I'm not arguing with this.

> Say you want to have some prints go to one particular file, today you
> cannot easily do it, you have to either do a regex based search/
> replace or fiddle with the sys.stdout etc. both have substantial
> drawbacks.

Well, you could find all print statements reliably using various
parsing solutions provided with Python. It's interesting that for this
reason, migrating from the print statement is not particularly
difficult whereas identifying invocations of the upcoming print built-
in function will not be a trivial task. I'm not passing judgement on
the introduction of the print function here, but I find such
properties of the language very interesting - it's not too far removed
from the static typing debate or people's fascination with making
domain-specific languages.

> A solution would be writing the code with a logging function to begin
> with, alas many times that is out of one's hand. I wished print was a
> function great many times. I bet Guido has had similar experiences,
> note that attempt to keep print in the current form but have it print
> to a file ... with that crazy syntax, print >>f, ... alas that did not
> solve anything

Yes, print >>f is a bit of a hack which I must admit to using
occasionally. However, for every enthusiast of one approach, there
will always be an enthusiast for another (see point #6):

http://mechanicalcat.net/cgi-bin/log/2003/09/02#anti-pitfalls

> It is time to fix it for good.

Well, it has always been possible to use a logging function, just not
one called "print" exactly.

Paul



From steve at holdenweb.com  Sat Aug 18 21:25:06 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 18 Aug 2007 21:25:06 -0400
Subject: "constructor" or initialization function for module
In-Reply-To: <1187484559.935316.125050@j4g2000prf.googlegroups.com>
References: <1187484559.935316.125050@j4g2000prf.googlegroups.com>
Message-ID: <fa865a$mq7$1@sea.gmane.org>

beginner wrote:
> Hi Everyone,
> 
> An extended module (.pyd) written in C have an init function that is
> called when the module is imported. Does anyone know if there is a way
> to provide an init function for a module written in python?
> 
The body of a Python module is executed the first time it is imported 
(that's how the functions and classes get defined: class and def 
statements are executable), so just put your initialization code inline.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From ladaan at iptel.org  Thu Aug 23 12:27:40 2007
From: ladaan at iptel.org (Ladislav Andel)
Date: Thu, 23 Aug 2007 18:27:40 +0200
Subject: comparing two lists
Message-ID: <46CDB57C.9080701@iptel.org>

Hi,
what would be the most efficient way to do following?

I have a list of dictionaries  taken from DB e.g.  
dblist = [{'id:1, 'host':'google.com','ip_address':'1.2.3.4'},
{'id:3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
{'id:9, 'host':'msn.com','ip_address':'11.3.2.3'}]

and list of object instances in memory(it's just for example)
which are looping within itself and testing particular hosts

memlist = [<instance 1>,<instance 2>]
memlist[0].id  is 1 and  memlist[0].host is google.com etc.
memlist[1].id  is 9 and  memlist[1].host is msn.com etc.

Now I want to add a new instance to memlist since id=3(in dblist) is not 
in memlist.
How would you iterate through it and insert a new instance?

The result should be:
memlist = [<instance 1>,<instance 2>, <instance 3>]
memlist[0].id  is 1 and  memlist[0].host is google.com etc.
memlist[1].id  is 3 and  memlist[1].host is yahoo.com etc.
memlist[2].id  is 9 and  memlist[2].host is msn.com etc.

Furthermore, I can have the opposite situation.
This time I need to remove from memlist a host which is not in dblist.
How would you do this?

The way how it works is that DBlist is loaded every 10 minutes and 
compares with memlist.
The memlist should be the same as dblist.

Could you help me, please?
I'm working on my version of this but somebody might be quicker than me.
In case I have it done I will post it.

Thanks,
Lada






There is



and wt


From vinya.jag at gmail.com  Thu Aug  9 02:57:34 2007
From: vinya.jag at gmail.com (Vinay Sagar Prakash)
Date: Thu, 9 Aug 2007 12:27:34 +0530
Subject: Expect Telnet
Message-ID: <a31681b60708082357s40bd4b28lf03fd077c0c3d9ac@mail.gmail.com>

Hi all,

I am not sure how this works, but am composing my query here.

I am trying to expect the below snippet using telnetlib.

#################
bash# install
blah blah blah
do you want to continue [y/n]? y
blah blah blah
 blah blah blah
blah blah blah
blah blah blah
Installation complete
bash#
##################

For the above, i am doing
t.read_until("bash#")
t.write("install\n")
t.read_until("n]? ")
t.write("y\n")
t.read_until("bash#")
t.write('exit\n")

However, from the time i key 'y/n' till the install script exits, there is a
lot of data that is to be logged. I takes around 1 hour for the whole script
to exit.
Is there some way i can read whats happening behind the scenes until it hits
the read_until?

Thanks for the help
-- 
Vinay
-------------- next part --------------
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From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Aug 11 17:37:07 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 11 Aug 2007 23:37:07 +0200
Subject: Public Telnet Server?
References: <1186844845.304731.18300@x40g2000prg.googlegroups.com>
Message-ID: <5i6og3F3mr9f4U2@mid.individual.net>

Dave wrote:

> Hi there. I'm a beginner at Python and I'm writing my first Python
> script. It's a text adventure about coffee and mixing drinks and
> being crazy and such. I keep updating it and want my friends to
> beta test it for me, but some of them don't have the right version
> of Python or don't want to get Python at all.

Sounds like Windows users. Isn't py2exe an option?

Regards,


Bj?rn

-- 
BOFH excuse #339:

manager in the cable duct



From afriere at yahoo.co.uk  Tue Aug 28 22:22:39 2007
From: afriere at yahoo.co.uk (Asun Friere)
Date: Tue, 28 Aug 2007 19:22:39 -0700
Subject: Pythonic way of reading a textfile line by line without throwing
	an exception
In-Reply-To: <mailman.90.1188344955.28954.python-list@python.org>
References: <1ab7b8470708281647g59e685ect371f20aaea30b070@mail.gmail.com>
	<mailman.90.1188344955.28954.python-list@python.org>
Message-ID: <1188354159.471066.11470@q3g2000prf.googlegroups.com>

On Aug 29, 9:49 am, "Deivys Ramirez" <deivys.rami... at gmail.com> wrote:

> What's the "pythonic" way of reading a text file, line by line,
> without throwing an exception when there's nothing to be read?
>
> I've been trying to map my while(!eof(fp)) mindset to the file object
> Python gives me when I call open() but have had no good results.

As the previous posts have indicated the idiomatic (and highly
readable) way to read a file is simply to iterate across it.  Just in
case you are ever in the position of having to use .readline()
directly, you might want to note that this method returns empty lines
as '\n' (go figure) and the EOF simply as ''.  So you test of EOF
using 'if not line :' rather than anything like 'if eof :'
Historically, ie. before file objects were iterables, you would have
written something like this:

fobj = open('foo.txt')
while 1 :
    line = fobj.readline()
    if not line :
        break
    #do stuff to line
fobj.close()

Obviously iterating 'for line in fobj : ' is neater.



From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Sun Aug 12 13:48:21 2007
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J. Fromberger)
Date: Sun, 12 Aug 2007 13:48:21 -0400
Subject: Regular Expression Grouping
References: <1186939262.144073.182450@z24g2000prh.googlegroups.com>
Message-ID: <Michael.J.Fromberger-B02D00.13482112082007@localhost>

In article <1186939262.144073.182450 at z24g2000prh.googlegroups.com>,
 linnewbie at gmail.com wrote:

> Fairly new to this regex thing, so this might be very juvenile but
> important.
> 
> I cannot understand and why 'c' constitutes a group here without being
> surrounded by "(" ,")" ?
> 
> >>>import re
> >>> m = re.match("([abc])+", "abc")
> >>> m.groups()
> ('c',)
> 
> Grateful for any clarity.

Hello!

I believe your confusion arises from the placement of the "+" operator 
in your expression.  You wrote:

  '([abc])+'

This means, in plain language, "one or more groups in which each group 
contains a string of one character from the set {a, b, c}."

Contrast this with what you probably intended, to wit:

  '([abc]+)'

The latter means, in plain language, "a single group containing a string 
of one or more characters from the set {a, b, c}."

In the former case, the greedy property of matching attempts to maximize 
the number of times the quantified expression is matched -- thus, you 
match the group three times, once for each character of "abc", and the 
result shows you only the last occurrence of the matching. 

Compare this with the following:

] import re
] m = re.match('([abc]+)', 'abc')
] m.groups()
=> ('abc',)

I suspect the latter is what you are after.

Cheers,
-M

-- 
Michael J. Fromberger             | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/  | Dartmouth College, Hanover, NH, USA


From wolf_tracks at invalid.com  Sun Aug 19 15:32:17 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Sun, 19 Aug 2007 12:32:17 -0700
Subject: Python on Computation, Math and Statistics
In-Reply-To: <5irgvaF3oi5dpU2@mid.uni-berlin.de>
References: <m_%xi.34088$2v1.7394@newssvr14.news.prodigy.net>
	<5irgvaF3oi5dpU2@mid.uni-berlin.de>
Message-ID: <DU0yi.1286$Oo.199@newssvr17.news.prodigy.net>

Google? What's that? Thanks. I like to get a insider's view when I know 
experts are out there. So now I ask a deeper question. Are there matrix 
computation libraries or even statistical (regression, factor analysis) 
libraries?

Diez B. Roggisch wrote:
> W. Watson schrieb:
>> I would hope Python is doing a lot of standard computations beyond 
>> arithmetic. Trig functions and more. Comments?
> 
> Bad google day?
> 
> http://docs.python.org/lib/numeric.html
> 
> Additionally, there are several scientific extensions, like SciPy, 
> Numeric/Numpy and so forth.
> 
> 
> Diez

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From mail at timgolden.me.uk  Fri Aug 31 08:36:20 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 31 Aug 2007 13:36:20 +0100
Subject: win32com problem: more than one instance
In-Reply-To: <1188562822.741578.139370@d55g2000hsg.googlegroups.com>
References: <1188562822.741578.139370@d55g2000hsg.googlegroups.com>
Message-ID: <46D80B44.3050708@timgolden.me.uk>

Thomas Rademacher wrote:
> Hello,
> 
> I start my script convert.py simultaneously in any dos-shells several
> times. But I get every time the same solidworks instance.
> I see in the proccess (task) manager only one solidworks.exe
> Therefore I get for all simultaneous conversions the same output file.

I *think* -- and I'm really hoping someone more knowledgeable
can chip in here -- that it's down to the particular COM
object implementation. ie Excel may choose to offer you
separate instances (or whatever they're called) while SolidWorks
may not.

TJG


From paul.heslop at blueyonder.co.uk  Mon Aug 13 08:06:59 2007
From: paul.heslop at blueyonder.co.uk (Paul Heslop)
Date: Mon, 13 Aug 2007 12:06:59 GMT
Subject: Air conditioners for free!??!?!!!
References: <1187002521.547470.50160@22g2000hsm.googlegroups.com>
Message-ID: <46C0494D.9AEF7824@blueyonder.co.uk>

fritz wrote:
> 
> http://goodgrief

-- 
Paul  (We won't die of devotion)  
-------------------------------------------------------   
Stop and Look 
http://www.geocities.com/dreamst8me/


From tenax.raccoon at gmail.com  Tue Aug 28 11:27:14 2007
From: tenax.raccoon at gmail.com (Jason)
Date: Tue, 28 Aug 2007 08:27:14 -0700
Subject: Check for dict key existence, and modify it in one step.
In-Reply-To: <1188311810.226363.295500@w3g2000hsg.googlegroups.com>
References: <1188311810.226363.295500@w3g2000hsg.googlegroups.com>
Message-ID: <1188314834.777923.236070@r34g2000hsd.googlegroups.com>

On Aug 28, 8:36 am, rodrigo <rodrigo... at gmail.com> wrote:
> Im using this construct a lot:
>
> if dict.has_key(whatever):
>     dict[whatever] += delta
> else:
>     dict[whatever] = 1
>
> sometimes even nested:
>
> if dict.has_key(whatever):
>     if dict[whatever].has_key(someother):
>         dict[whatever][someother] += delta
>     else:
>         dict[whatever][someother] = 1
> else:
>     dict[whatever]={}
>     dict[whatever][someother] = 1
>
> there must be a more compact, readable and less redundant way to do
> this, no?
>
> Thanks,
>
> Rodrigo

As Bruno said, don't shadow the built-in objects.  When things
inevitably go south because the dict class has been replaced by your
dictionary, it will be difficult for you to find out what went wrong.

Under Python 2.5, you have the defaultdict class in the collections
module [1].  (This class is trivial to implement in prior versions of
Python, too.)

>>> from collections import defaultdict
>>> myDict = defaultdict(lambda: 1)
>>> myDict['spam'] = 5
>>> myDict['spam'] += 10
>>> myDict['vikings'] += 20
>>> myDict
defaultdict(<function <lambda> at 0x00AAC970>, {'vikings': 21, 'spam':
15})
>>>

  --Jason

[1] The module documentation is at "http://docs.python.org/lib/module-
collections.html"



From aleax at mac.com  Thu Aug 30 22:54:46 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 30 Aug 2007 19:54:46 -0700
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<1i3ob5k.dm3jmoqx1z68N%aleax@mac.com>
	<mailman.182.1188527911.28954.python-list@python.org>
Message-ID: <1i3ocjx.1wnfv2po5t466N%aleax@mac.com>

Ricardo Ar?oz <ricaraoz at gmail.com> wrote:
   ...
> Alex Martelli wrote:
> > <zzbbaadd at aol.com> wrote:
> >    ...
> >> In my case of have done os.listdir() on two directories. I want to see
> >> what files are in directory A that are not in directory B.
> > 
> > So why would you care about WHERE, in the listdir of B, are to be found
> > the files that are in A but not B?!  You should call .index only if you
> > CARE about the position.
> > 
> > def inAnotB(A, B):
> >     inA = os.listdir(A)
> >     inBs = set(os.listdir(B))
> >     return [f for f in inA if f not in inBs]
> > 
> > is the "one obvious way to do it" (the set(...) is just a simple and
> > powerful optimization -- checking membership in a set is roughly O(1),
> > while checking membership in a list of N items is O(N)...).
> 
> And what is the order of passing a list into a set? O(N)+?

Roughly O(N), yes (with the usual caveats about hashing costs, &c;-).
So, when A has M files and B has N, your total costs are roughly O(M+N)
instead of O(M*N) -- a really juicy improvement for large M and N!


Alex


From kyosohma at gmail.com  Tue Aug 21 13:01:05 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 21 Aug 2007 10:01:05 -0700
Subject: str().join() isn't working
In-Reply-To: <1187659123.397704.195900@m37g2000prh.googlegroups.com>
References: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com>
	<mailman.4.1187633821.32294.python-list@python.org>
	<1187634895.387910.179500@m37g2000prh.googlegroups.com>
	<1187659123.397704.195900@m37g2000prh.googlegroups.com>
Message-ID: <1187715665.155599.152170@j4g2000prf.googlegroups.com>

On Aug 20, 8:18 pm, Asun Friere <afri... at yahoo.co.uk> wrote:
> On Aug 21, 4:34 am, kyoso... at gmail.com wrote:
>
> > to concatenate 2 lists to each other before it does the join, ... is
> > impossible in Python. The "+" operator is only for addition and for
> > two or more strings.
>
> Really?
>
> >>> [1,2,3] + [4,5,6]
>
> [1, 2, 3, 4, 5, 6]

Yeah...my bad. I was coming down with a cold when I wrote that.

Mike



From steve at holdenweb.com  Fri Aug 31 10:59:51 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 10:59:51 -0400
Subject: strings (dollar.cents) into floats
In-Reply-To: <87ps14bddb.fsf@benfinney.id.au>
References: <mailman.140.1188483282.28954.python-list@python.org>	<877incd20i.fsf@benfinney.id.au>	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
	<87ps14bddb.fsf@benfinney.id.au>
Message-ID: <fb9ada$e3l$1@sea.gmane.org>

Ben Finney wrote:
> Wildemar Wildenburger <lasses_weil at klapptsowieso.net> writes:
> 
>> But what use is there for floats, then? When is it OK to use them?
> 
> When one is willing to sacrifice decimal precision for speed of
> calculation, and doesn't need the numbers to stay precise. E.g. when
> performing millions of calculations on real-world (analogue)
> measurements.
> 
Traditionally, mainframe computers used BCD arithmetic to handle 
currency, and the Decimal module is probably the best way to proceed if 
your Python is recent enough to include it.

That isn't to say that currencies can't be handled using floating-point. 
The important thing then becomes to round after each calculation rather 
than allowing the errors to build up until they become significant 
enough to make a difference to the final result.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From arkanes at gmail.com  Tue Aug 14 08:57:55 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 14 Aug 2007 07:57:55 -0500
Subject: wxPython before MainLoop
In-Reply-To: <13c1v79hs0dob3@corp.supernews.com>
References: <13bl9a75laqcm70@corp.supernews.com>
	<13bnh5bs4b9h427@corp.supernews.com>
	<5i3b1jF3n5bdtU1@mid.individual.net>
	<13c1v79hs0dob3@corp.supernews.com>
Message-ID: <4866bea60708140557v5b2acfd1y7af068845f43c529@mail.gmail.com>

On 8/13/07, [david] <david at nospam.spam> wrote:
> Well yes, I have tried this app with native windows,
> and I know how to do it.
>

I don't believe you. If you meant "I copied something that does this
off of code project", that I'll believe.

> But if all wxPython can offer is a poor imitation
> of MFC, I'm better off using MFC aren't I?
>

MFC offers no special support at all for anything you're doing.
wxPython actually does have some, but that may or may not be helpful
since you haven't been exactly clear as to what your needs are (Show()
should never be slow, and if it is you're doing something wrong) and
you've got an egregiously bad attitude that cuts my interest in
helping you down rather a lot.

> And too all those people who wrote back to insist
> that users MUST explicitly build a multi-threaded
> framework for wxPython:
>
> It's supposed to already be a framework :~)
>

wxPython doesn't *need* a multi-threading framework. It's got a
threadsafe way to schedule events, and the Python standard library has
all the other synchronization primitives you need, including a queue.
There's nothing special that needs to be done to it. Nobody told you
to "build a multi-threaded framework", they told you to use the
threading framework which already exists.


From steve at holdenweb.com  Thu Aug  2 06:32:33 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Aug 2007 06:32:33 -0400
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <20070801224219.GD25065@spookie1.spookiegate>
References: <46AF8ED7.2070206@wingware.com>	<20070801212840.GA25065@spookie1.spookiegate>	<f8quug$m7j$1@sea.gmane.org>	<496954360708011453h2a68dee4x48dcb15bb25ea717@mail.gmail.com>	<f8r0du$qhn$1@sea.gmane.org>
	<f8r147$rvm$1@sea.gmane.org>
	<20070801224219.GD25065@spookie1.spookiegate>
Message-ID: <f8sbs5$8c3$1@sea.gmane.org>

John K Masters wrote:
> On 18:23 Wed 01 Aug     , Steve Holden wrote:
>> Joshua J. Kugler wrote:
>>> On Wednesday 01 August 2007 13:53, Robert Dailey wrote:
>>>> He's secretly an employee of Wing IDE in disguise!!!
>>> Sorry to destroy your conspiracy theories, but no, I've never been employed
>>> by Wing IDE in any fashion, nor have I ever received any monetary
>>> compensation from them in any form.  Just a satisfied user.  That's all.
>>>
>>> j
>>>
>> Me too, and I have to say the response I have had to all my technical 
>> support requests has been first-class. Maybe they are busy because 
>> they're in beta? I know they aren't the largest company, but they can 
>> stand comparison with most when it comes to support.
>>
>> I can't think of any other products I use where you can contact the 
>> support team from right inside the software. And get answers without 
>> paying per-incident support fees!
>>
>> regards
>>   Steve
>> -- 
> 
> I am happy to hear that you have had a good experience with wingide and
> I wish I could say the same as I have found the product to be excellent
> as far as the concept goes but lacking in the implementation. 
> 
> To suggest that, because the autocompletion worked on one method of a
> module and not on another was because I had not configured the
> PYTHONPATH properly is at least insulting.
> 
> Regards, John

We must all be guided by personal experience, I suppose. Personally I 
wouldn't get insulted if someone suggested I might have made a mistake, 
since I have made enough in my life to recognize it as a pattern. 
Problem identification has to start with the most likely causes.

I am sure that had you written back to say you had checked the 
PYTHONPATH and were still looking for the problem cause they would have 
answered you civilly and with other possible causes.

regards
  steve

-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From jstroud at mbi.ucla.edu  Sat Aug  4 00:06:10 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 03 Aug 2007 21:06:10 -0700
Subject: How to pass a reference to the current module
In-Reply-To: <mailman.1600.1186193779.22759.python-list@python.org>
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>	<mailman.1597.1186189477.22759.python-list@python.org>	<f90ktr$hic$1@zinnia.noc.ucla.edu>
	<mailman.1600.1186193779.22759.python-list@python.org>
Message-ID: <f90tvj$nt7$1@zinnia.noc.ucla.edu>

Carsten Haese wrote:
> On Fri, 2007-08-03 at 18:31 -0700, James Stroud wrote:
>>Carsten Haese wrote:
>>You sound like my former thesis adviser.
> 
> 
> Thanks. I guess.

Yes, its a compliment in disguise--just check his CV.

>>OK. From an external source, such as configuration file, the user will 
>>specify the *name* of a function somehow with the assumption that the 
>>function will be coded somewhere (in the present or other modules) by 
>>that name.
> 
> Does the configuration file indicate which module contains the function?
> 

It is possible. Please see my latest response to Paul Rubin.

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From hyugaricdeau at gmail.com  Wed Aug 22 10:22:28 2007
From: hyugaricdeau at gmail.com (Hyuga)
Date: Wed, 22 Aug 2007 14:22:28 -0000
Subject: How to optimise this code?
In-Reply-To: <mailman.105.1187772731.32294.python-list@python.org>
References: <mailman.68.1187711977.32294.python-list@python.org>
	<faf33r$rb8$01$1@news.t-online.com>
	<1187750385.511936.318560@i13g2000prf.googlegroups.com>
	<mailman.105.1187772731.32294.python-list@python.org>
Message-ID: <1187792548.846045.14040@l22g2000prc.googlegroups.com>

On Aug 22, 4:52 am, "David N Montgomery" <monty.pyt... at fastmail.fm>
wrote:
> unittest is the best choice for my needs and works perfectly in Eclipse.
> Unfortunately though it (and many other things) does not work under the
> application we have to use to run our python scripts.
>
> This leaves me with 'functionToCall = getattr(self, "testCase%s" % tc)'.
> This achieves the optimisation/simplification I had been looking for.
>
> Thank you once again.

Just out of curiosity, what about your environment prevents you from
using unittest?

Hyuga



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Aug 19 17:32:17 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 19 Aug 2007 23:32:17 +0200
Subject: Hot subject: a good python editor and/or IDE?
References: <mailman.2162.1187525764.22759.python-list@python.org>
	<5iqreuF3qanv6U1@mid.individual.net>
	<mailman.2166.1187530711.22759.python-list@python.org>
Message-ID: <5irr71F3r2m8aU1@mid.individual.net>

Buchoux S?bastien wrote:
> Yeah, I know this is a FAQ, but, as you mention, there is a whole
> bunch of editors, every one of them being updated constantly (+
> the new ones getting out). 

Are you really sure that you know the meaning of the
word "frequently"?

> So I am quite sure that looking through the archives is THE
> solution since it will only reflect what people thought when
> question was asked. Just type "best Python editor" on Google and
> you will see that almost all hits are completely out of date. Fair
> enough though! ;) 

I spoke of this MAILING LIST'S ARCHIVES, not of some web forum
you'll get with google.


Bj?rn

-- 
BOFH excuse #119:

evil hackers from Serbia.



From carsten at uniqsys.com  Fri Aug 10 00:25:34 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 10 Aug 2007 00:25:34 -0400
Subject: accessing static attributes
In-Reply-To: <1186714304.352882.40520@j4g2000prf.googlegroups.com>
References: <1186714304.352882.40520@j4g2000prf.googlegroups.com>
Message-ID: <20070810040618.M49202@uniqsys.com>

On Fri, 10 Aug 2007 02:51:44 -0000, james_027 wrote
> hi,
> 
> for example an request object ... is request.user the same as
> request.__class__.user?

Not in general:

>>> class Request(object):
...    user = "somebody"
...
>>> request = Request()
>>> request.user == request.__class__.user
True
>>> request.user = "nobody"
>>> request.user == request.__class__.user
False

--
Carsten Haese
http://informixdb.sourceforge.net



From richardlev at gmail.com  Fri Aug 10 21:26:14 2007
From: richardlev at gmail.com (Richard Levasseur)
Date: Sat, 11 Aug 2007 01:26:14 -0000
Subject: Extending logging module
In-Reply-To: <1186675688.291944.299060@z24g2000prh.googlegroups.com>
References: <1186675688.291944.299060@z24g2000prh.googlegroups.com>
Message-ID: <1186795574.657771.42170@x40g2000prg.googlegroups.com>

On Aug 9, 9:08 am, jay <titleistf... at gmail.com> wrote:
> Hello,
>
> I've been using the python logging module a lot lately, and I've come
> across an instance where I need some new levels.  Specifically, python
> does not include ALERT and NOTICE in the default set of logging
> levels.  I am wondering how trivial it would be to extend the logging
> module to include these 2 levels that are standard with syslog?
>
> My first test was just to use the addLevelName method to add the two
> new levels, but syslog ignores them and logs at the next highest
> priority, no matter what I use.
>
> Looking further into the code and as a test, I changed the following
> to see if this would even work
>
> lib/python2.5/logging/__init__.py
>   -> class Logger
>   -> add new notice and alert root level functions
>   -> new _levelNames for notice and alert
>   -> new default level names for notice and alert
>
> lib/python2.5/logging/handlers.py
>   -> class SysLogHandler priority_map was changed to include notice
> and alert
>
> It actually worked, but this is not the way I would like to handle the
> problem.  I would prefer to extend the classes instead.  However, I'm
> not too familiar with that, and I had to change things in so many
> places, I'm wondering if its even possible?  I don't like changing the
> standard libraries, what happens if I have to upgrade python?  My
> changes get overwritten.
>
> Can anyone offer some help or suggestions?  Thanks
>
> Jay

Try looking at module new, i did the same to add a 'profile' level.
If push comes to shove, you can always wrap your logger object up or
access the __dict__ directly.

http://docs.python.org/lib/module-new.html

hope this helps,
richard



From rcdailey at gmail.com  Wed Aug  1 17:53:29 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Wed, 1 Aug 2007 16:53:29 -0500
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <f8quug$m7j$1@sea.gmane.org>
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
	<f8quug$m7j$1@sea.gmane.org>
Message-ID: <496954360708011453h2a68dee4x48dcb15bb25ea717@mail.gmail.com>

He's secretly an employee of Wing IDE in disguise!!!

On 8/1/07, Joshua J. Kugler <joshua at eeinternet.com> wrote:
>
> On Wednesday 01 August 2007 13:28, John K Masters wrote:
>
> > On 15:34 Tue 31 Jul     , Wingware wrote:
> >> Hi,
> >>
> >> I'm happy to announce the first beta release of Wing IDE 3.0.  It is
> >> available from http://wingware.com/wingide/beta
> > If their support for paid customers is anything like their support for
> > prospective customers then I would leave well alone.
>
> I've had excellent support from them.  I'm sorry to hear your experiences
> have not been stellar.  Questions submitted to the bug or comment list
> usually get a response in one day or less.  And there are frequently
> respones by WingWare people to just about every question asked on the
> WingWare mailing list.
>
> > I have been trying wing for a few days but have noticed that
> > auto-completion does not work on all modules. I submitted this to wing
> > and was told that probably my PYTHONPATH was wrong.
>
> It may also not work if the IDE isn't sure what kind of object you are
> dealing with.  You can "clarify" this as documented with an
> assert(isinstance()) statement.
>
> > I subsequently submitted a question about the licensing, i.e. whether I
> > could use wing on a home setup using Debian Etch, where I develop my
> > apps, and a work setup, using Debian Etch, with no net access.
>
> From http://www.wingware.com/wingide/license:
>
> "Each Wing IDE user may run Wing on as many machines as needed for their
> own
> work, for all the operating systems which they have licensed. In order to
> reduce casual license sharing, which is a unfortunately a problem for
> small
> businesses like Wingware, licenses must be activated after installation on
> each machine."
>
> "We've worked hard to make this flexible and forgiving for valid
> customers.
> For example, reinstalling an OS and/or altering hardware usually should
> not
> break your activation. Also, activation can be done directly from Wing IDE
> and off-line activation is available if your machine does not have TCP
> port
> 80 (http) access to wingware.com. Each license is allowed three
> activations
> by default and more can be obtained on request from identifiable
> customers."
>
> > So far I have had no response
>
> I tend to let questions slide when they are answered in the documentation
> or
> on the web site.  Maybe the Wing developers/support personnel are the same
> way.
>
> j
>
> --
> Joshua Kugler
> Lead System Admin -- Senior Programmer
> http://www.eeinternet.com
> PGP Key: http://pgp.mit.edu/ ID 0xDB26D7CE
>
> --
> http://mail.python.org/mailman/listinfo/python-list
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From conspiracy.black6 at gmail.com  Mon Aug  6 14:22:57 2007
From: conspiracy.black6 at gmail.com (conspiracy.black6 at gmail.com)
Date: Mon, 06 Aug 2007 18:22:57 -0000
Subject: Conspiracies Revealed! Shadow governments
Message-ID: <1186424577.505694.105290@r34g2000hsd.googlegroups.com>

http://nasaconspiracy.net/conspiracy - Find out who really shot JFK!,
learn how they faked the lunar landing, see what they are putting in
our milk to enlarge young womens breasts in a goal to raise the
declining birth rate.  Proof of extraterrestrial life and much more
revealed here.



From sebzzz at gmail.com  Wed Aug  8 13:06:37 2007
From: sebzzz at gmail.com (sebzzz at gmail.com)
Date: Wed, 08 Aug 2007 10:06:37 -0700
Subject: Removing tags with BeautifulSoup
Message-ID: <1186592797.471030.308410@l70g2000hse.googlegroups.com>

Hi,

I'm in the process of cleaning some html files with BeautifulSoup and
I want to remove all traces of the tables. Here is the bit of the code
that deals with tables:

def remove(soup, tagname):
    for tag in soup.findAll(tagname):
        contents = tag.contents
        parent = tag.parent
        tag.extract()
        for tag in contents:
            parent.append(tag)

remove(soup, "table")
remove(soup, "tr")
remove(soup, "td")

It works fine but leaves an empty table structure at the end of the
soup. Like:

      <table>
        <tr>
          <td></td>
        </tr>

        <tr>
          <td></td>
        </tr>

        <tr>
          ...

And the extract method of BeautifulSoup seems the extract only what is
in the tags.

So I'm just looking for a quick and dirty way to remove this table
structure at the end of the documents. I'm thinking with re but there
must be a way to do it with BeautifulSoup, maybe I'm missing
something.

An other thing that makes me wonder, this code:

    for script in soup("script"):
        soup.script.extract()

Works fine and remove script tags, but:

    for table in soup("table"):
        soup.table.extract()

Raises AttributeError: 'NoneType' object has no attribute 'extract'

Oh, and BTW, when I extract script tags this way, all the tag is gone,
like I want it, it doesn't only removes the content of the tag.

Thanks in advance



From bignose+hates-spam at benfinney.id.au  Sat Aug 25 02:20:12 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 25 Aug 2007 16:20:12 +1000
Subject: Online documentation split onto many small pages (was:
	py2exe/distutils: how to include a tree of files?)
References: <13cuhdr58m5one7@corp.supernews.com>
	<13cukd39lgsfgb4@corp.supernews.com>
	<1188000252.290854.289870@q4g2000prc.googlegroups.com>
	<13cv0jpdot6fo20@corp.supernews.com>
Message-ID: <87absgjftv.fsf_-_@benfinney.id.au>

Grant Edwards <grante at visi.com> writes:

> I don't really understand what the advantage for splitting up
> documentation into screen-sized chunks is supposed to be -- all the
> web browsers I've ever seen can scroll.

The issue is the time to download the page. Most of the world does not
have fast internet access.

> One page per module or chapter sure would make it easier to
> search...

Fortunately online documentation in multiple HTML pages is indexable
by the major search engines; most of those can search within one
domain, or even within one path prefix of a domain.

-- 
 \     "Listen: we are here on Earth to fart around. Don't let anybody |
  `\               tell you otherwise."  -- _Timequake_, Kurt Vonnegut |
_o__)                                                                  |
Ben Finney


From programmer.py at gmail.com  Tue Aug 14 12:55:04 2007
From: programmer.py at gmail.com (programmer.py at gmail.com)
Date: Tue, 14 Aug 2007 16:55:04 -0000
Subject: module: zipfile.writestr - line endings issue
In-Reply-To: <1187107452.905165.45700@l70g2000hse.googlegroups.com>
References: <1187107452.905165.45700@l70g2000hse.googlegroups.com>
Message-ID: <1187110504.154878.317460@19g2000hsx.googlegroups.com>

On Aug 14, 11:04 am, towers <damondo... at googlemail.com> wrote:
> Hi
>
> I'm probably doing something stupid but I've run into a problem
> whereby I'm trying to add a csv file to a zip archive - see example
> code below.
>
> The csv just has several rows with carriage return line feeds (CRLF).
>
> However after adding it to an archive and then decompressing the line
> endings have been converted to just line feeds (LF).
>
> Does anyone know if this is a bug or am I just doing something wrong?
>
> Many Thanks,
> Damon
>
> ****************************************************************************
> import zipfile
>
> zipFile = zipfile.ZipFile('LocalZipFile.zip', 'a',
> zipfile.ZIP_DEFLATED)
> dfile = open('LocalCSVFile.csv', 'r')
> zipFile.writestr('test.csv',dfile.read())
> dfile.close()
> zipFile.close()
> ****************************************************************************

Line endings will drive you up the wall.  Anyway, the python zipfile
library does not seem to be doing any translations.  The code below
works for me.

# begin code
import zipfile
import os.path

# First create some work data...
csv_data = '1,2\r\n3,4\r\n5,6\r\n'

# Now, create the zipfile
zip_file = zipfile.ZipFile(r'c:\tmp\test.zip', 'w',
zipfile.ZIP_DEFLATED)
zip_file.writestr('test.csv',csv_data)
zip_file.close()

# Now, extract the info
zip_file = zipfile.ZipFile(r'c:\tmp\test.zip')
assert len(zip_file.read('test.csv')) == len(csv_data)
# end code

Something else must be tweaking your line endings.
HTH!

jw



From johnmasters at oxtedonline.net  Wed Aug 15 18:15:12 2007
From: johnmasters at oxtedonline.net (John K Masters)
Date: Wed, 15 Aug 2007 23:15:12 +0100
Subject: replacement for string.printable
In-Reply-To: <5ih0vlF3mc1akU2@mid.uni-berlin.de>
References: <mailman.2026.1187204186.22759.python-list@python.org>
	<5ih0vlF3mc1akU2@mid.uni-berlin.de>
Message-ID: <20070815221512.GB9275@spookie1.spookiegate>

On 19:03 Wed 15 Aug     , Marc 'BlackJack' Rintsch wrote:
> On Wed, 15 Aug 2007 19:56:01 +0100, John K Masters wrote:
> 
> > From what I have read the string module is obsolete and [???]
> 
> The `string` module isn't obsolete.  It even contains a more or less
> recent new addition: `Template`.  Only the functions that are also
> available as methods on `str` are deprecated.
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch
> -- 
> http://mail.python.org/mailman/listinfo/python-list
 
help('string')

DESCRIPTION
Warning: most of the code you see here isn't normally used nowadays.
Beginning with Python 1.6, many of these functions are
implemented as methods on the standard string object. They used to be
implemented by a built-in module called strop, but strop is now
obsolete itself.

<quote> Beginning with Python 1.6 </quote>

We are now way past 1.6. Are you sure the string module is still being
added to?

Regards, John
-- 
War is God's way of teaching Americans geography
Ambrose Bierce (1842 - 1914)


From bj_666 at gmx.net  Wed Aug 29 10:08:04 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 29 Aug 2007 14:08:04 GMT
Subject: What's the difference ?
References: <1188394767.333396.129020@r29g2000hsg.googlegroups.com>
Message-ID: <5jlcu4F31aaU2@mid.uni-berlin.de>

On Wed, 29 Aug 2007 13:39:27 +0000, Alex wrote:

> Hye,
> 
> I was just wondering what is the difference between
> 
>>> if my_key in mydict:
>>>     ...
> 
> and
> 
>>> if mydict.has_keys(my_key):
>>>     ...
> 
> I've search a bit in the python documentation, and the only things I
> found was that they are "equivalent".
> 
> But in this (quiet old) sample ( "http://aspn.activestate.com/ASPN/
> Cookbook/Python/Recipe/59875" ), there is difference between the two
> notation.

The comments in this recipes source code are misleading.  Difference is
not the ``in`` but that it is used on ``another_dict.keys()`` in the "bad"
example.  That is a linear search on a list with all keys instead asking
the dictionary directly like you did above.

The difference in your code above is that  ``in`` works on other types too
that implement `__contains__()`, like lists or sets for example, and that
it is a bit faster as the second example has to look up the `has_key()`
method on the object first.

Ciao,
	Marc 'BlackJack' Rintsch


From jcd at sdf.lonestar.org  Wed Aug 22 11:35:40 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Wed, 22 Aug 2007 11:35:40 -0400
Subject: for statement on empty iterable
In-Reply-To: <slrnfcoam7.14g.horpner@FIAD06.norwich.edu>
References: <1187760507.951994.50310@q4g2000prc.googlegroups.com>	<7xabsk3zgm.fsf@ruckus.brouhaha.com>	<1187761270.713307.224570@i38g2000prf.googlegroups.com>	<7xejhw15r9.fsf@ruckus.brouhaha.com>	<1187761957.636211.107060@x40g2000prg.googlegroups.com>	<7xd4xgnldp.fsf@ruckus.brouhaha.com>	<1187765372.361411.249990@z24g2000prh.googlegroups.com>	<5j2679F3s7lbpU1@mid.uni-berlin.de>
	<slrnfcoam7.14g.horpner@FIAD06.norwich.edu>
Message-ID: <46CC57CC.4060101@sdf.lonestar.org>

Neil Cerutti wrote:
> On 2007-08-22, Diez B. Roggisch <deets at nospam.web.de> wrote:
>   
>> While it is desireable to not only write working, but also
>> aesthetically pleasing code, as a beginner you shouldn't worry
>> too much. The sense of aesthetics develops with time. Important
>> is to try and grasp the idioms of the language, around here
>> ofter referred to as "beeing pythonic."
>>     
>
> It's hard to keep up with the new buzzwords that keep popping up
> in this group.
>
>   
Ouch.  That stings.
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From steve at holdenweb.com  Thu Aug  2 08:42:44 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Aug 2007 08:42:44 -0400
Subject: Use variable in regular expression
In-Reply-To: <1186051401.122847.114690@d55g2000hsg.googlegroups.com>
References: <1186051401.122847.114690@d55g2000hsg.googlegroups.com>
Message-ID: <46B1D144.8060108@holdenweb.com>

CarpeSkium at gmail.com wrote:
> I know I can use a variable in regular expressions. I want to use a
> regex to find something based on the beginning of the string. I am
> using yesterday's date to find all of my data from yesterday.
> Yesterday's date is 20070731, and assigned to the variable
> "yesterday_date". I want to loop thru a directory and find all of the
> yesterday's data ONLY IF the feature class has the date at the
> BEGINNING of the filename.
> 
> Sample strings:
> 20070731_test1
> Copy20070731_test1
> 20070731_test2
> Copy20070731_test2
> 20070731_test3
> Copy20070731_test3
> 
> I don't want the one's that start with "Copy". I can't figure out the
> syntax of inserting the "^" into the regex. I've tried all of the
> following, with no luck:
> 
> re.compile(^yesterday_date)
> re.compile(r'^yesterday_date')
> re.compile(r'^[yesterday_date]')
> re.compile(r'[^yesterday_date]')
> 
> I don't know what I'm doing and I'm just guessing at this point. Can
> anyone help? Thanks.
> 
As is often the case, taking a larger look at the problem can reveal 
that Python has features that can help you without even getting down to 
more complex stuff.

You appear to require a list of the files whose names begin with a 
string representation of yesterday's date.

If you take a look at the glob module you will see that it has a glob() 
function, and if you were to call it as

     names = glob.glob(yesterday_date + "*")

it would return a list of the names of the files you are interested in.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From ldo at geek-central.gen.new_zealand  Sat Aug 25 08:39:40 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 26 Aug 2007 00:39:40 +1200
Subject: curses library
References: <mailman.1980.1187115104.22759.python-list@python.org>
Message-ID: <fap7po$tr0$1@lust.ihug.co.nz>

In message <mailman.1980.1187115104.22759.python-list at python.org>, Ghirai
wrote:

> I need to write a console application.

Why not just use VT100 escape sequences directly? Terminal emulators don't
support anything else.


From thomas.rademacher at nikocity.de  Fri Aug 31 08:20:22 2007
From: thomas.rademacher at nikocity.de (Thomas Rademacher)
Date: Fri, 31 Aug 2007 05:20:22 -0700
Subject: win32com problem: more than one instance
Message-ID: <1188562822.741578.139370@d55g2000hsg.googlegroups.com>

Hello,

I start my script convert.py simultaneously in any dos-shells several
times. But I get every time the same solidworks instance.
I see in the proccess (task) manager only one solidworks.exe
Therefore I get for all simultaneous conversions the same output file.

I tested the same code with excel (test_excel.py) and her I get many
instances of excel in proccess (task) manager.
How can I get many instances of solidworks?

Is it a problem of python?
Or is it a problem of the Solidworks-COM-Implemention and I get the
same problem with an C++ client implementation?

Thanks for your help, Thomas

convert.py
   import pythoncom
   pythoncom.CoInitializeEx(pythoncom.COINIT_MULTITHREADED)

   sldworks = gencache.EnsureModule('{83A33D31-27C5-11CE-
BFD4-00400513BB57}', 0x0, 13, 0)
   sw = sldworks.ISldWorks(DispatchEx('SldWorks.Application'))
   swmodel, errors, warnings = sw.OpenDoc6(sourceName,
constants.swDocPART, constants.swOpenDocOptions_Silent, "")
   activeDoc = sw.ActiveDoc
   retval, errors, warnings = swmodel.SaveAs4(targetName,
constants.swSaveAsCurrentVersion ,
constants.swOpenDocOptions_Silent )

   pythoncom.CoUninitialize()

test_excel.py

   import pythoncom
   pythoncom.CoInitializeEx(pythoncom.COINIT_MULTITHREADED)

   myExcel = win32com.client.DispatchEx('Excel.Application')
   myExcel.Visible = 1
   Excel = myExcel.Workbooks.Open(excelfile, 0, False, 2)
   Excel.Saved = 1
   Excel.Close()
   myExcel.Quit()
   del myExcel
   del Excel

   pythoncom.CoUninitialize()



From evan at yelp.com  Tue Aug 28 11:43:12 2007
From: evan at yelp.com (Evan Klitzke)
Date: Tue, 28 Aug 2007 08:43:12 -0700
Subject: Check for dict key existence, and modify it in one step.
In-Reply-To: <1188311810.226363.295500@w3g2000hsg.googlegroups.com>
References: <1188311810.226363.295500@w3g2000hsg.googlegroups.com>
Message-ID: <1188315792.6440.3.camel@thinkpad>

On Tue, 2007-08-28 at 14:36 +0000, rodrigo wrote:
> Im using this construct a lot:
> 
> if dict.has_key(whatever):
>     dict[whatever] += delta
> else:
>     dict[whatever] = 1

In Python 2.5 there's a defaultdict class, otherwise you can subclass
dict like this:

class CountingDictionary(dict):
    def increment(self, key, delta=1):
        self[key] = self.get(key, 0) + delta

Hope this helps!

-- 
Evan Klitzke <evan at yelp.com>



From pacman128 at gmail.com  Wed Aug 15 08:39:22 2007
From: pacman128 at gmail.com (Paul Carter)
Date: Wed, 15 Aug 2007 12:39:22 -0000
Subject: module: zipfile.writestr - line endings issue
In-Reply-To: <1%xwi.1232$4w7.433@newssvr22.news.prodigy.net>
References: <1187107452.905165.45700@l70g2000hse.googlegroups.com>
	<1187110504.154878.317460@19g2000hsx.googlegroups.com>
	<1187112768.095414.223640@w3g2000hsg.googlegroups.com>
	<1187120956.574400.99170@g4g2000hsf.googlegroups.com>
	<1%xwi.1232$4w7.433@newssvr22.news.prodigy.net>
Message-ID: <1187181562.451366.311840@r29g2000hsg.googlegroups.com>

On Aug 15, 3:33 am, Suresh Babu Kolla <kollasb+n... at gmail.com> wrote:
> Paul Carter wrote:
>
> > The problem is with how you are opening the file. You need to open in
> > binary mode if you wish to read your file unaltered. Also, file() is
> > preferred over open() these days I think. Use:
>
> > dfile = file('test.csv', 'rb')
>
>  From Python 2.5 library documentation.
>
> <quote>
>       When opening a file, it's preferable to use `open()' instead of
>       invoking this constructor directly.  `file' is more suited to type
>       testing (for example, writing `isinstance(f, file)').
> </quote>
>
> Python documentation seem to recommend using open(). I personally prefer
> to use open, just because python open has same signature as POSIX open,
> even beginner programmers can understand the intent of the code clearly.
>
> Kolla

Yeah, you're right. I know I had read that file() was preferred
somewhere, but obviously it wasn't a good source. Thanks for the
correction!

--
Paul



From hyugaricdeau at gmail.com  Thu Aug  2 12:26:43 2007
From: hyugaricdeau at gmail.com (Hyuga)
Date: Thu, 02 Aug 2007 16:26:43 -0000
Subject: i am new to python-Please somebody help
In-Reply-To: <pan.2007.08.02.12.51.13.363293@REMOVE.THIS.cybersource.com.au>
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com>
	<pan.2007.08.02.12.51.13.363293@REMOVE.THIS.cybersource.com.au>
Message-ID: <1186072003.352710.68310@e16g2000pri.googlegroups.com>

On Aug 2, 8:51 am, Steven D'Aprano
<st... at REMOVE.THIS.cybersource.com.au> wrote:
> On Thu, 02 Aug 2007 09:31:43 +0000, cool.vimalsmail wrote:
>
> [snip]
>
> You would be better off actually writing a sensible subject line instead
> of grovelling.
>
> Subject: How to use gzip in Python? [beginner]
>
> Then, having written a good subject line, it might have suggested a good
> search string for Google: "gzip python"
>
> http://www.google.com.au/search?&q=gzip+python
>
> The first two links found will answer your question.
>
> --
> Steven.

<OT>
Unlike gregarican, I mostly agree with the content of your post.
Except for your subject line suggestion.  Why on earth would you
recommend someone use the obnoxious "How to ______ ?" question
format?  Yes, I know it's extremely common, but it's completely
nonsensical English.  Just try saying it out loud with an inquiring
inflection on the last word.  Sounds ridiculous doesn't it?  At least
without the question mark it means that the thread is on the topic of
"How to _____".
</OT>



From rschroev_nospam_ml at fastmail.fm  Sat Aug 11 13:21:28 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sat, 11 Aug 2007 17:21:28 GMT
Subject: Augmented assignment (was Re: Something in the function tutorial
	confused me.)
In-Reply-To: <f9khib$kvq$1@panix3.panix.com>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<m3hvi.37606$G23.6240@newsreading01.news.tds.net>
	<f9kdpq$drp$1@panix3.panix.com>
	<bAjvi.47120$wv5.1434653@phobos.telenet-ops.be>
	<f9khib$kvq$1@panix3.panix.com>
Message-ID: <semvi.47351$Wo7.893986@phobos.telenet-ops.be>

Aahz schreef:
>>>> def foo(bar): bar[0] += ['zap']
> ... 
>>>> import dis
>>>> dis.dis(foo)
>   1           0 LOAD_FAST                0 (bar)
>               3 LOAD_CONST               1 (0)
>               6 DUP_TOPX                 2
>               9 BINARY_SUBSCR       
>              10 LOAD_CONST               2 ('zap')
>              13 BUILD_LIST               1
>              16 INPLACE_ADD         
>              17 ROT_THREE           
>              18 STORE_SUBSCR        
>              19 LOAD_CONST               0 (None)
>              22 RETURN_VALUE        
> 
> Notice the critical sequence: BINARY_SUBSCR, INPLACE_ADD, STORE_SUBSCR.
> It has to work that way to allow this:
> 
>>>> l = [7]
>>>> l[0] += 1
>>>> l
> [8]
> 
> There's simply no way to get augmented assignment to work correctly with
> both lists and tuples when you allow both mutable and immutable elements.
> Someone will always get surprised, and overall with strings and numbers
> being the canonical list elements, I think making augmented assignment
> work correctly with lists and immutables was the best decision.

Thank you, I get it now. With that disassembled code in mind I had 
another look at the relevant section in the Language Reference; now I 
have a much better understanding of what's really happening.

I used to interpret the target in 'The target is only evaluated once' 
more like an L-value in C/C++. That's not correct, of course, but I 
didn't understand exactly how wrong it was until now.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From ninja.krmenadl at nes.com  Tue Aug 21 12:37:32 2007
From: ninja.krmenadl at nes.com (Boris Ozegovic)
Date: Tue, 21 Aug 2007 18:37:32 +0200
Subject: I Need help from all the group participants
References: <fac7nj$ci9$1@localhost.localdomain>
	<s1Eyi.6409$r5.4111@fe111.usenetserver.com>
Message-ID: <faf4bh$kkp$1@localhost.localdomain>

Aaron wrote:

[...]
> Good luck.  

Thanks a lot for your help.

-- 
Ne dajte da nas la?ljivac Bandi? truje:
http://cnn.blog.hr/arhiva-2007-06.html#1622776372


From jmtulloss at gmail.com  Thu Aug  9 22:12:33 2007
From: jmtulloss at gmail.com (Justin T.)
Date: Fri, 10 Aug 2007 02:12:33 -0000
Subject: Threaded Design Question
In-Reply-To: <1186709917.157105.310050@g12g2000prg.googlegroups.com>
References: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
	<1186686575.192491.82820@e16g2000pri.googlegroups.com>
	<1186709917.157105.310050@g12g2000prg.googlegroups.com>
Message-ID: <1186711953.893176.95300@e16g2000pri.googlegroups.com>


> approach.  That sounds the easiest, although I'm still interested in
> any idioms or other proven approaches for this sort of thing.
>
> ~Sean

Idioms certainly have their place, but in the end you want clear,
correct code. In the case of multi-threaded programming,
synchronization adds complexity, both in code and concepts, so
figuring out a clean design that uses message passing tends to be
clearer and more robust. Most idioms are just a pattern to which
somebody found a simple, robust solution, so if you try to think of a
simple, robust solution, you're probably doing it right. Especially in
trivial cases like the one above.

Justin



From wollez at gmx.net  Fri Aug 10 07:38:28 2007
From: wollez at gmx.net (WolfgangZ)
Date: Fri, 10 Aug 2007 13:38:28 +0200
Subject: subprocess.Popen(cmd) question
In-Reply-To: <f9h9fa$3i8$1@sea.gmane.org>
References: <f9h9fa$3i8$1@sea.gmane.org>
Message-ID: <f9hink$a0$1@sea.gmane.org>

WolfgangZ schrieb:
> Hello,
> 
> I'm starting some subprocesses inside a loop. The processes run 
> independent and dont need any communication between each other. Due to 
> memory issues I need to limit the number of running processes to around 
> 10. How can I insert a break into my loop to wait until some processes 
> are finished?
> 
> Some minimal examplecode:
> 
> import subprocess
> for i in range(0,100):
>      cmd='ping localhost'
>      p=subprocess.Popen(cmd)
>      p.wait()
> 
> Thanks for any ideas.
> 
> Wolfgang
> 

Problem solved by using "threading"

Wolfgang



From ca.allen at gmail.com  Fri Aug  3 13:00:15 2007
From: ca.allen at gmail.com (Chris Allen)
Date: Fri, 03 Aug 2007 10:00:15 -0700
Subject: Global package variable, is it possible?
Message-ID: <1186160415.065108.139160@e9g2000prf.googlegroups.com>

Hello fellow pythoneers.  I'm stumped on something, and I was hoping
maybe someone in here would have an elegant solution to my problem.
This is the first time I've played around with packages, so I'm
probably misunderstanding something here...

Here's what I'd like to do in my package.  I want my package to use a
configuration file, and what I'd like is for the config file to appear
magically in each module so I can just grab values from it without
having to load and parse the config file in each package module.  Not
quite understanding how the __init__.py file works, I expected it to
be as easy as just setting up the ConfigParser object and then I
figured (since a package is a module) that it would now be global to
my package and I could access it in my modules, but I was wrong...  I
don't want to have to pass it in to each module upon init, or anything
lame like that.  A main reason for this is that I'd like to be able to
reload the config file dynamically and have all my modules
automatically receive the new config.  There must be a way to do this,
but seeing how __init__.py's namespace is not available within the
package modules, I don't see a simple and elegant way to do this.
Does anybody have any suggestions?  Thanks!



From sbellon at sbellon.de  Thu Aug  2 08:19:06 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Thu, 2 Aug 2007 14:19:06 +0200
Subject: Catching SystemExit in C API code when embedding Python?
Message-ID: <20070802141906.2581c099@cube.tz.axivion.com>

Hi all!

I am embedding Python into a GUI application in a way that the GUI is
scriptable using Python.

Now I have come to a problem that when the user puts a "sys.exit(0)"
into his script to end the script, not only the script is terminated,
but also the GUI application itself. This is not the intended behaviour.

As in Python itself you can catch SystemExit, I think this should be
the way to go. But how do I catch this exception from within the C API?

Thanks in advance for any hints.

-- 
Stefan Bellon


From coolmann123 at hotmail.com  Sat Aug 11 19:14:50 2007
From: coolmann123 at hotmail.com (Hasipups)
Date: Sat, 11 Aug 2007 16:14:50 -0700
Subject: New Programms for free
Message-ID: <1186874090.159064.85290@22g2000hsm.googlegroups.com>

http://www.pennergame.de/ref.php?uid=5572



From ptmcg at austin.rr.com  Fri Aug 17 10:53:20 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Fri, 17 Aug 2007 07:53:20 -0700
Subject: Naming dictionaries recursively
In-Reply-To: <1187354296.177606.273300@22g2000hsm.googlegroups.com>
References: <1187354296.177606.273300@22g2000hsm.googlegroups.com>
Message-ID: <1187362400.939540.40650@w3g2000hsg.googlegroups.com>

On Aug 17, 7:38 am, TYR <a.harrow... at gmail.com> wrote:
> I'd like to do something like this; iterate through a file which
> consists of data stored in dictionary format, one dict on each line,
> and read each line into a new dict using one of the values in the dict
> as its name...
>
> for example:
>
> stuff = open('data.txt')
>  for eachLine in stuff:
>   name{}
>    name = eachLine
> ....and then do something clever to extract the value of the key
> (name) from the line and use it as the dictionary's name.
>
> A line from data.txt would look like this: {'name' : Bob, 'species' :
> Humboldt, 'colour' : red, 'habits' : predatory}. Aim is to call one of
> them by name, and merge the values in that dictionary into a string
> pulled from another source.

Pyparsing includes an example that is very similar to this.  Here is
that example adapted to your specific data:

from pyparsing import *

line = """{'name' : Bob, 'species' : Humboldt, 'colour' : red,
'habits' : predatory}"""

LBRACE,RBRACE,COLON,COMMA = map(Suppress,"{}:,")
key = sglQuotedString.setParseAction(removeQuotes)
value = OneOrMore(Word(alphanums))\
                    .setParseAction(keepOriginalText)
entry = Group(key + COLON + empty + value)
lineExpr = LBRACE + Dict(delimitedList(entry)) + RBRACE

parsedData = lineExpr.parseString(line)

# some examples of accessing the parsed data
print "Keys:", parsedData.keys()
print parsedData.name
print parsedData.colour
print "Name: %(name)s \nSpecies: %(species)s \n" \
        "Colour: %(colour)s \nHabits: %(habits)s" % parsedData

Prints:

Keys: ['colour', 'habits', 'name', 'species']
Bob
red
Name: Bob
Species: Humboldt
Colour: red
Habits: predatory

-- Paul



From getelectronic at gmail.com  Wed Aug  8 10:23:03 2007
From: getelectronic at gmail.com (getgroup)
Date: Wed, 08 Aug 2007 07:23:03 -0700
Subject: making a opc client in Python and use opc server Events
In-Reply-To: <1186496239.764001.259880@57g2000hsv.googlegroups.com>
References: <1180949568.305737.175350@n4g2000hsb.googlegroups.com>
	<1183042522.949829.19840@m36g2000hse.googlegroups.com>
	<1186496239.764001.259880@57g2000hsv.googlegroups.com>
Message-ID: <1186582983.518428.262180@b79g2000hse.googlegroups.com>

On 7 ao?t, 07:17, jp.eugs... at googlemail.com wrote:
> On 28 juin, 16:55, jp.eugs... at googlemail.com wrote:
>
>
>
>
>
> > On 4 juin, 11:32, getelectro... at gmail.com wrote:
>
> > > Hi all
> > > I have a sample code to implementopcclientinPython. i use a
> > > file .py making by makepy with pythonwin for Com Interface.
> > > i can get all server in machine, connect to serveropc, disconnect,
> > > add group, add item, read, write item in serveropc.
>
> > > import win32com.client # librairie pour utiliser l'interface COM/DCOM
> > > from win32com.clientimport gencache
> > > gencache.EnsureModule('{DFB83232-A952-11D2-A46B-00C04F796375}', 0, 1,
> > > 0)
>
> > > for svr in opcserver.GetOPCServers():
> > >     print svr
>
> > > #connect to serverOPCDemo Simulation from Matrikon
> > > opcserver.Connect('Matrikon.OPC.Simulation.1')
>
> > > # Instance object Groups
> > > groups=opcserver.OPCGroups
> > > #add group
> > > group=groups.Add('Group1')
>
> > > #instance onject Items
> > > items=group.OPCItems
> > > # add item in serveropc
> > > tem=items.AddItem('File1.item1',1)
>
> > > #read item value
> > > item.Read(win32com.client.constants.OPCDevice)
>
> > > # write a new value
> > > item.Write(100)
>
> > > #read item value
> > > item.Read(win32com.client.constants.OPCDevice)
> > > #if no pb you have 100 :)
>
> > > #Disconnect
> > > #opcserver.Disconnect()
>
> > > BUT, and BUT, i want to use a event fromopcserver for uodating item
> > > value with this below class. And i don't konw how make it!!!!!!!!
> > > help me plz
>
> > > opcserver=win32com.client.Dispatch('OPC.Automation.1')
> > > and now i want to use events fromopcserver. in a class:
> > > class DIOPCGroupEvent:
> > > class DIOPCGroupsEvent:
> > > class DIOPCServerEvent:
>
> > Try this:
>
> > # Event Handlers
> > class ServerEvent:
> >         def __init__(self):
> >                 print 'Init ServerEvent'
>
> >         def OnServerShutDown(self, Reason):
> >                 print 'OnServerShutDown', Reason
>
> > class GroupEvent:
> >         def __init__(self):
> >                 print 'Init GroupEvent'
>
> >         def OnAsyncCancelComplete(self, CancelID):
> >                 print 'OnAsyncCancelComplete', CancelID
>
> >         def OnDataChange(self, TransactionID, NumItems, ClientHandles,
> > ItemValues, Qualities, TimeStamps):
> >                 print 'OnDataChange', zip(ClientHandles, ItemValues, Qualities)
>
> >         def OnAsyncReadComplete(self, TransactionID, NumItems, ClientHandles,
> > ItemValues, Qualities,
> >                                                  TimeStamps, Errors):
> >                 print 'OnAsyncReadComplete', zip(ClientHandles, ItemValues,
> > Qualities)
>
> >         def OnAsyncWriteComplete(self, TransactionID, NumItems,
> > ClientHandles, Errors):
> >                 print 'OnAsyncWriteComplete', zip(ClientHandles, Errors)
>
> > class GroupsEvent:
> >         def __init__(self):
> >                 print 'Init GroupsEvent'
>
> >         def OnGlobalDataChange(self, TransactionID, GroupHandle, NumItems,
> > ClientHandles, ItemValues,
> >                                                  Qualities, TimeStamps):
> >                 print 'OnGlobalDataChange', zip(ClientHandles, ItemValues,
> > Qualities)
>
> >opc= DispatchWithEvents('Matrikon.OPC.Automation.1', ServerEvent)
>
> > groups = DispatchWithEvents(opc.OPCGroups, GroupsEvent)
> > groups.DefaultGroupIsActive = True
> > groups.DefaultGroupUpdateRate = 2000
>
> > group1 = DispatchWithEvents(groups.Add('G1'), GroupEvent)
> > group2 = DispatchWithEvents(groups.Add('G2'), GroupEvent)
> > #etc ...
>
> > It works for the GroupsEvents but I don't get the GroupEvent for each
> > group, I may still do someting wrong..- Masquer le texte des messages pr?c?dents -
>
> > - Afficher le texte des messages pr?c?dents -
>
> In order to get the GroupEvent, you have to keep a reference to the
> group you add
> eg:
> g1 = groups.Add('G1')
> group1 = DispatchWithEvents(g1, GroupEvent)
> etc...- Masquer le texte des messages pr?c?dents -
>
> - Afficher le texte des messages pr?c?dents -

Hi Yes i try it.
But when a client get a datachange the script is bloked
you must kill a main thread, this solution is not good.

i have experimented this programme:

http://groups.google.fr/group/cn.bbs.comp.lang.python/browse_thread/thread/7904c9e48e50bf4d/1ecb94a0aca9e8d6?lnk=st&q=client+opc+python&rnum=25&hl=fr#1ecb94a0aca9e8d6

it run when a item in Group is changed But you can't do anything in a
loop WHEN.



From jmg3000 at gmail.com  Tue Aug 21 17:06:03 2007
From: jmg3000 at gmail.com (John)
Date: Tue, 21 Aug 2007 21:06:03 -0000
Subject: Call for advice on how to start PyOpenGL!
In-Reply-To: <1187589198.616866.280500@j4g2000prf.googlegroups.com>
References: <1187589198.616866.280500@j4g2000prf.googlegroups.com>
Message-ID: <1187730363.799335.190340@w3g2000hsg.googlegroups.com>

On Aug 20, 1:53 am, math2life <QJing... at gmail.com> wrote:
> I work with python for two years, are familiar with image processing,
> but beginner on PyOpenGL and OpenGL.
>
> Any advice appreciated!

Here's a little "hello world" PyOpenGL program I had lying around that
might be useful:

http://www.milliwatt-software.com/jmg/files/pyopengl_template.py

---John



From gtcopeland at gmail.com  Tue Aug 21 15:48:56 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: Tue, 21 Aug 2007 12:48:56 -0700
Subject: Shed Skin Python-to-C++ compiler 0.0.23
In-Reply-To: <mailman.3.1187613108.26576.python-list@python.org>
References: <mailman.3.1187613108.26576.python-list@python.org>
Message-ID: <1187725736.061893.318420@57g2000hsv.googlegroups.com>

On Aug 20, 7:31 am, "Mark Dufour" <mark.duf... at gmail.com> wrote:
> Hi all,
>
> I have just released Shed Skin 0.0.23. It doesn't contain the type
> inference scalability improvements I was working on, but it does have
> quite a few bug fixes and minor feature additions. Here's a list of
> changes:
>
> -support for __iadd__, __imul__ and such (except __ipow__ and __imod__)
> -some overdue set optimizations
> -fix for string formatting problem (%% did not always work)
> -extension module stability fixes
> -fix for particular inheritance problem
> -other minor bugfixes, cleanups, and error messages
>
> I could really use some systematic help in pushing Shedskin further. Some ideas:
>
> -send in bug reports - these are extremely valuable and motivating to
> me, yet I don't receive many..
> -find out why test 148 is currently broken under windows
> -add datetime, re or socket support
> -look into supporting custom classes in generated extension modules
> -write a Shedskin tutorial for 'novice' programmers
> -systemically test performance and suggest and work on improvements
> -investigate replacements for std::string and __gnu_cxx::hash_set
> -perform janitorial-type work in ss.py and lib/builtin.?pp
> -support extension modules under OSX (OSX gives me accute mental RSI)
> -add more tests to unit.py
>
> Thanks,
> Mark Dufour.
> --
> "One of my most productive days was throwing away 1000 lines of code"
> - Ken Thompson


One more thing.  Please include a link to the current project page
when you make these postings.

Greg



From __peter__ at web.de  Mon Aug 27 12:06:16 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 27 Aug 2007 18:06:16 +0200
Subject: How to free memory ( ie garbage collect) at run time with Python
	2.5.1(windows)
References: <1188224306.863247.127890@50g2000hsm.googlegroups.com>
	<1i3hujk.ulsjt32wqtq0N%aleax@mac.com>
	<faus7d$hda$00$1@news.t-online.com>
Message-ID: <fauspo$hda$00$2@news.t-online.com>

Peter Otten wrote:

> Alex Martelli wrote:
> 
>> Integer objects that are once generated are kept around in a "free list"
>> against the probability that they might be needed again in the future (a
> 
> Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
> [GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> x = 1000
>>>> y = 1000
>>>> x is y
> False
> 
> Why don't x and y point to the same object then?
> 
> Peter

Oops, I think I got it now. The actual objects are freed, only the memory is
kept around for reuse with other ints...

Peter


From software at ginstrom.com  Thu Aug 30 20:23:47 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Fri, 31 Aug 2007 09:23:47 +0900
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188518054.298017.90610@x35g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com><-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com><1188364909.397692.209170@q4g2000prc.googlegroups.com><1188367108.393207.241970@g4g2000hsf.googlegroups.com><1188369928.755777.142690@i38g2000prf.googlegroups.com><46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
Message-ID: <00a001c7eb65$32b25240$0303a8c0@MOUSE>

> On Behalf Of Russ
> Once you have the conditions in place, all you need to do in 
> your unit tests is to send inputs to the unit and wait to see 
> if exceptions are thrown.

That sounds a little ambitious to me...

However, you may want to look at the typecheck module (you can get it via
easy_install). I think you could probably extend it to do DBC.
http://oakwinter.com/code/typecheck/

>>> from typecheck import accepts, returns, Any
>>> @accepts(str, int, Any())
@returns(list)
def makelist(a, b, c):
	return [a, b, c]

>>> makelist("spam", 42, object())
['spam', 42, <object object at 0x00AE0470>]
>>> makelist(42, "spam", 3.4)

Traceback (most recent call last):
  File "<pyshell#25>", line 1, in <module>
    makelist(42, "spam", 3.4)
  File
"C:\Python25\lib\site-packages\typecheck-0.3.5-py2.5.egg\typecheck\__init__.
py", line 1340, in fake_function
  File
"C:\Python25\lib\site-packages\typecheck-0.3.5-py2.5.egg\typecheck\__init__.
py", line 1419, in __check_args
TypeCheckError: Argument a: for 42, expected <type 'str'>, got <type 'int'>
>>> 

I tried using DBC for a time in C++ (using a library with a clever
assembly-language hack). I personally found it neater having such code in
unit tests, but obviously, it's a matter of preference.

Regards,
Ryan Ginstrom



From steveo at syslang.net  Fri Aug 17 09:38:50 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Fri, 17 Aug 2007 09:38:50 -0400 (EDT)
Subject: Need to generate some functions.
Message-ID: <alpine.LFD.0.999.0708170858320.21497@saturn.syslang.net>

Given a list of names

ll = ("n1", "n2", "n3", "n4")

I want to create a pair of functions based off of each name. An example of 
what I want to happen would look like this:

def mkn1dict(address):
     return {'Address': address, 'Control': SOME_CONST}

def mkn1Classobj(address):
     return Classobj( mkn1classobj(address) )

I know how to do this in a preprocessor, but I'd like to do it directly in 
python. Can this be done?

TIA


-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From deets at nospam.web.de  Tue Aug  7 02:41:51 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 07 Aug 2007 08:41:51 +0200
Subject: read(size=-1)
In-Reply-To: <1186466817.747723.87910@19g2000hsx.googlegroups.com>
References: <1186466817.747723.87910@19g2000hsx.googlegroups.com>
Message-ID: <5hqihjF3kjes7U1@mid.uni-berlin.de>

7stud schrieb:
> Suppose I write:
> 
> f = open("myimg.jpg")
> f.read(10)
> 
> 
> According to the docs,
> -----------
> read([size])
> 
> Read at most size bytes from the file....The bytes are returned as a
> string object.
> ----------
> 
> How does python convert a byte to a string?

A string _is_ a  sequence of bytes - there is nothing to convert.

Diez



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Aug 28 18:12:20 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 29 Aug 2007 00:12:20 +0200
Subject: localhost, ?!
References: <fb1id4$kpp$1@localhost.localdomain>
	<5jjbpfF3sm4m7U2@mid.individual.net>
	<fb1vh2$lqg$1@localhost.localdomain>
Message-ID: <5jjku4F3tpdfrU1@mid.individual.net>

Boris Ozegovic wrote:
> Bjoern Schliessmann wrote:
 
>> Definitely a problem with the web server (503 means "service
>> unavailable").
> 
> I did try on two servers, Apache and simple python server.  There
> was identically error on both servers.

Also try to look at the logs, you're bound find something there too.
   
>> Try using wireshark or a similar tool to see what's going on on
>> protocol level.
> 
> Ok.

And don't forget to report back :)

Regards,


Bj?rn

-- 
BOFH excuse #307:

emissions from GSM-phones



From rodrigo.cr at gmail.com  Tue Aug 21 08:45:56 2007
From: rodrigo.cr at gmail.com (rodrigo)
Date: Tue, 21 Aug 2007 12:45:56 -0000
Subject: Retrieving a variable's name.
In-Reply-To: <fado06$a1e$1@zinnia.noc.ucla.edu>
References: <1187658202.236626.93600@50g2000hsm.googlegroups.com>
	<fado06$a1e$1@zinnia.noc.ucla.edu>
Message-ID: <1187700356.974638.234550@50g2000hsm.googlegroups.com>

You're right, Paul, Evan, James, I should just use a dictionary.

Thanks!

Rodrigo



From Graham.Dumpleton at gmail.com  Wed Aug  8 20:17:41 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Thu, 09 Aug 2007 00:17:41 -0000
Subject: Destruction of generator objects
In-Reply-To: <20070808002852.6228ae91@cube.tz.axivion.com>
References: <20070808002852.6228ae91@cube.tz.axivion.com>
Message-ID: <1186618661.845525.225010@x35g2000prf.googlegroups.com>

On Aug 8, 8:28 am, Stefan Bellon <sbel... at sbellon.de> wrote:
> Hi all,
>
> I'm generating a binding from Python to C using SWIG. On the C side I
> have iterators over some data structures. On the Python side I
> currently use code like the following:
>
>     def get_data(obj):
>         result = []
>         iter = make_iter(obj)
>         while more(iter):
>             item = next(iter)
>             result.append(item)
>         destroy(iter)
>         return result
>
> Now I'd like to transform it to a generator function like the following
> in order to make it more memory and time efficient:
>
>     def get_data(obj):
>         iter = make_iter(obj)
>         while more(iter):
>             yield next(iter)
>         destroy(iter)
>
> But in the generator case, I have a problem if the generator object is
> not iterated till the StopIteration occurs, but if iteration is stopped
> earlier. In that case, the C iterator's destroy is not called, thus the
> resource is not freed.
>
> Is there a way around this? Can I add some sort of __del__() to the
> generator object so that in case of an early destruction of the
> generator object, the external resource is freed as well?
>
> I'm looking forward to hearing your hints!
>
> --
> Stefan Bellon

Perhaps read through:

  http://www.python.org/dev/peps/pep-0325/
  http://www.python.org/dev/peps/pep-0342/

The latter superseding the first.

Based on these what the WSGI specification:

  http://www.python.org/dev/peps/pep-0333/

did was mandate that the consumer of data from the generator
explicitly call the close() method on the generator no matter whether
all data was consumed or not, or whether an exception occurred.

    result = application(environ, start_response)
    try:
        for data in result:
            if data:    # don't send headers until body appears
                write(data)
        if not headers_sent:
            write('')   # send headers now if body was empty
    finally:
        if hasattr(result,'close'):
            result.close()

That the consumer called close() allowed generators to provide a
close() method to cleanup resources even though older version of
Python was being used which didn't support automatic means of close()
being called. In other words, it allowed the required cleanup and was
forward compatible with newer versions of Python.

Graham



From dobedani at gmx.net  Wed Aug  1 07:58:59 2007
From: dobedani at gmx.net (Dobedani)
Date: Wed, 01 Aug 2007 04:58:59 -0700
Subject: Plain old SAX and minidom useable? But how then?
Message-ID: <1185969539.653078.287360@w3g2000hsg.googlegroups.com>

Dear All,

I guess I don't know where to look for the right information. I hope
you guys can help me on the way. I want to retrieve a string from an
XML-file. If Python were to have XPath available, my problem would be
solved. The xquery string would be enough and I have already obtained
that the string. The problem is that I cannot use any add-on - like
xmllib, sax2 or elementtree - as my customers only have the so-called
stock Python install - i.e. version 2.4.1. I've seen some posts from
2? years ago by Nelson Minar and also by Uche Ogbuji who wrote:
"Nelson says: There's the stock Python install, which barely does
anything [for XML]. That's overstated. Plain old SAX and minidom may
not be ideal, but they're useable."

Please: where then can I find examples of such use? If I cannot use
xpath, I would not mind to browse a bit - e.g. using functions like
getElementByTag() but I don't even know how to use those. TIA

Kind regards,
Dobedani



From almadhu at gmail.com  Mon Aug 13 00:35:44 2007
From: almadhu at gmail.com (Madhu Alagu)
Date: Mon, 13 Aug 2007 04:35:44 -0000
Subject: python + XUL
In-Reply-To: <1186966451.081184.63490@r34g2000hsd.googlegroups.com>
References: <1186894004.913359.132000@b79g2000hse.googlegroups.com>
	<46BEA6FC.9050907@web.de>
	<1186966451.081184.63490@r34g2000hsd.googlegroups.com>
Message-ID: <1186979744.039833.213840@r34g2000hsd.googlegroups.com>

On Aug 13, 3:54 am, Luis M. Gonz?lez <luis... at gmail.com> wrote:
> On Aug 12, 3:21 am, Stefan Behnel <stefan.behnel-n05... at web.de> wrote:
>
> > Madhu Alagu wrote:
> > > Hi
>
> > > Python + XUL Success Stories
>
> > > Thanks
>
> > > Madhu Alagu
>
> > Any chance you forgot to ask a question?
>
> > Stefan
>
> My telepatic powers tell me that this means:
> "I don't really feel like googling, so just give me the info, ok?"



I am very sorry for the short word... Has anyone had any success in
getting XUL to work with python?



From laurent.pointal at limsi.fr  Tue Aug 14 09:20:30 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 14 Aug 2007 15:20:30 +0200
Subject: LEGB rule, totally confused ...
In-Reply-To: <mailman.1959.1187094797.22759.python-list@python.org>
References: <mailman.1959.1187094797.22759.python-list@python.org>
Message-ID: <f9sa70$i2h$1@news2.u-psud.fr>

stef mientki a ?crit :
> hello,
> 
> I've thought many times I finally understood the import / namespace rules,
> but again I'm totally lost :-(
> 
> This is my library file
> 
>    # Module lib_test.py
> 
>    X = 1
> 
>    def Init():
>        global X
>        X = 3
>        print 'Init', X
> 
>    def Run ():
>        print X                 <=== UnboundLocalError: local variable
>    'X' referenced before assignment
>        X = X + 1
>        print ' Run', X
> 
> 
> 
> And this my main program in another file:
> 
>    import lib_test
>    lib_test.Init()
>    print lib_test.X
> 
>    lib_test.Run()
>    print lib_test.X
> 
> Why do I get the error ?
> Printing isn't assigning anything or am I missing something.

If you use a global to *modify* it, you MUST declare "global X", either 
Python consider using a local.
So for your error: at compile time, in Run(), it see that it must use a 
local X (because you set it) and generate ad-hoc bytecode, but when 
running X is not defined locally, so the error.

> Now if I remove "X = X + 1" I don't get an error ???

If you remove the "X =..." statement, then the compiler dont know 
a-priori if its local or global, so it search X in both namespaces.

> Is this a problem of the traceback procedure or the IDE,
> or is Python not completely an interpreter, that reads line by line ???

Its compiled to buyte-code then interpreted from the byte-code.

> 
> Please explain this to me.
> 
> thanks,
> Stef Mientki

A+

Laurent.


From coyote_x at artcom.pl  Fri Aug 31 08:03:48 2007
From: coyote_x at artcom.pl (Adam Kubica)
Date: Fri, 31 Aug 2007 14:03:48 +0200
Subject: Pylons, SQLAlchemy, too many connections problem.
Message-ID: <pan.2007.08.31.12.03.48.18688@artcom.pl>

Hello.

I have pylons 0.96 (SVN) and current SQLAlchemy (0.3.10), and I have bug
that
doesn't exist earlier.

My connection code:
<code>
import sqlalchemy.mods.threadlocal
from sqlalchemy import DynamicMetaData, objectstore

metadata = DynamicMetaData( case_sensitive = False )

def db_connect( dsn ):
    engine = create_engine( dsn, echo=False, echo_pool=False,
encoding='latin2',  convert_unicode=True )
    metadata.connect( engine )
</code>

command "netstat -an|grep 5432|grep ESTABLISHED|wc -l" displays one
more connection after each refresh of page until I have exceptions
such as:

sqlalchemy.exceptions.DBAPIError: (Connection failed)
(OperationalError) FATAL: sorry, too many clients already

What is wrong?



From carl at 29degrees.co.uk  Tue Aug 28 13:26:03 2007
From: carl at 29degrees.co.uk (Carl Drinkwater | 29degrees)
Date: Tue, 28 Aug 2007 18:26:03 +0100
Subject: National grid to lat long conversion
In-Reply-To: <1188295755.877801.217710@r29g2000hsg.googlegroups.com>
References: <1188295755.877801.217710@r29g2000hsg.googlegroups.com>
Message-ID: <E9CFDD38-0BBB-415B-8ED0-33BEEB7530B8@29degrees.co.uk>

> I have a load of British National Grid references that I want to
> convert to decimal degrees so I can create a google KML file. Does
> anyone know of a module to do this?

If there isn't a module available, you could roll your own.  The  
equations are to be found at :

   http://www.ordnancesurvey.co.uk/oswebsite/gps/docs/ 
convertingcoordinatesEN.pdf

They shouldn't be too hard to Pythonise.

Regards,
Carl.


From dickinsm at gmail.com  Thu Aug 30 16:55:53 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: Thu, 30 Aug 2007 20:55:53 -0000
Subject: Biased random?
In-Reply-To: <1188506180.227794.20030@q5g2000prf.googlegroups.com>
References: <favd0c$fcu$1@ss408.t-com.hr>
	<mailman.80.1188332647.28954.python-list@python.org>
	<fb77bq$jtk$1@ss408.t-com.hr>
	<1188506180.227794.20030@q5g2000prf.googlegroups.com>
Message-ID: <1188507353.877677.79500@r23g2000prd.googlegroups.com>

> One possible fix:  do
>
>   x = randint(0, 10) - randint(0, 10)
>   x = abs(x) - (x<0)
>
> This collapses -1 and 0 to 0, -2 and 1 to 1, etc.

Or a slightly simpler formula that ends up producing the same
distribution:

x = min(randint(0, 10), randint(0, 10))

Mark



From horpner at yahoo.com  Thu Aug  9 13:15:08 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 09 Aug 2007 17:15:08 GMT
Subject: Stackless Integration
References: <1186650027.043779.276520@i38g2000prf.googlegroups.com>
	<mailman.1786.1186660119.22759.python-list@python.org>
	<1186678419.594781.149190@g12g2000prg.googlegroups.com>
Message-ID: <slrnfbmj19.1bg.horpner@FIAD06.norwich.edu>

On 2007-08-09, Justin T. <jmtulloss at gmail.com> wrote:
>
>> It's not Pythonic.
>>
>> Jean-Paul
>
> Ha! I wish there was a way to indicate sarcasm on the net. You
> almost got people all riled up!

Sorry. There's NO WAY to show sarcasm on the net. ;)

-- 
Neil Cerutti


From Shawn at Milochik.com  Thu Aug 16 09:55:33 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Thu, 16 Aug 2007 09:55:33 -0400
Subject: Python Book Recommendations
In-Reply-To: <1187271201.262706.132080@i38g2000prf.googlegroups.com>
References: <d5506a9f0708141439v6a30d4c8l5092b30d269c1af4@mail.gmail.com>
	<Pine.LNX.4.44.0708141556370.5396-100000@violet.rahul.net>
	<1b31ae500708141638w77614014o6f382d0389bc69df@mail.gmail.com>
	<mailman.2015.1187189280.22759.python-list@python.org>
	<1187191803.845011.30400@x35g2000prf.googlegroups.com>
	<fa0ruu$65r$1@news2.u-psud.fr>
	<1187271201.262706.132080@i38g2000prf.googlegroups.com>
Message-ID: <2dc0c81b0708160655n437500d5iefdd46ee5ffec3b9@mail.gmail.com>

I should add that "Dive Into Python" is also available for free online:

http://www.diveintopython.org/

It's a great book. It is not a linear book -- it doesn't start you off
talking about variable types and structure. It starts you right off
with a piece of working code. If you already have some programming
experience, it's actually a refreshing change from all the others
which basically waste 50 - 100 pages on stuff you already know.


From geoff.bache at pobox.com  Tue Aug 28 05:08:22 2007
From: geoff.bache at pobox.com (geoffbache)
Date: Tue, 28 Aug 2007 02:08:22 -0700
Subject: Getting subprocesses to be hidden on Windows
In-Reply-To: <1188250115.875160.276780@r29g2000hsg.googlegroups.com>
References: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
	<1188250115.875160.276780@r29g2000hsg.googlegroups.com>
Message-ID: <1188292102.065625.82670@22g2000hsm.googlegroups.com>

On Aug 27, 11:28 pm, kyoso... at gmail.com wrote:
> On Aug 27, 3:21 pm, geoffbache <geoff.ba... at pobox.com> wrote:
>
>
>
> > Hi,
>
> > As part of my efforts to write a test tool that copes with GUIs
> > nicely, I'm trying to establish how I can start a GUI process on
> > Windows that will not bring up the window. So I try to hide the window
> > as follows:
>
> > info = subprocess.STARTUPINFO()
> > info.dwFlags |= subprocess.STARTF_USESHOWWINDOW
> > info.wShowWindow = subprocess.SW_HIDE
>
> > proc = subprocess.Popen(..., startupinfo=info)
>
> > This works, in a way, but doesn't work recursively. I.e. if the
> > started process itself starts a window, that second window will not be
> > hidden. This even applies to dialog boxes within the application. So
> > instead of a lot of windows popping up I now get a lot of disembodied
> > dialogs appearing, which is a slight improvement but not much.
>
> > Also, certain processes (e.g. tkdiff) seem to ignore the directive to
> > be hidden altogether.
>
> > This is dead easy on UNIX with virtual displays like Xvfb. Can someone
> > shed any light if it's possible on Windows from python?
>
> > Regards,
> > Geoff Bache
>
> I'm confused. Why would you create a GUI if you're not going to
> actually display it? Isn't that the point of a GUI? Or are you talking
> about the command window popping up?
>
> Mike

Only in the context of testing it. If I run lots of GUI tests on my
computer I want
the tested GUIs to remain hidden so I can still use my computer in the
meantime...

Though if you can tell me how to stop the command window popping up on
Windows
I'll be grateful for that too (though it wasn't the original
question).

Geoff



From ssalvatori at gmail.com  Wed Aug  1 10:43:19 2007
From: ssalvatori at gmail.com (stefano)
Date: Wed, 01 Aug 2007 14:43:19 -0000
Subject: http client module
In-Reply-To: <mailman.1415.1185937817.22759.python-list@python.org>
References: <1185936595.262806.269290@19g2000hsx.googlegroups.com>
	<mailman.1415.1185937817.22759.python-list@python.org>
Message-ID: <1185979399.641093.98590@k79g2000hse.googlegroups.com>

On 31 jul, 23:07, Steve Holden <st... at holdenweb.com> wrote:
> stefano wrote:
> > Hello i'm looking for a http client for python i found this one call
> > httplib2
>
> >http://64.233.169.104/search?q=cache:0jJWNfodK6gJ:bitworking.org/proj...
>
> > but is too old
>
> Look at urllib and urllib2 in the standard library. If they don't give
> you what you want, think about using mechanize and ClientForm, or
> possible beautifulsoup, all of which Google should be able to find for you.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------

thanks



From rhamph at gmail.com  Thu Aug 30 16:31:08 2007
From: rhamph at gmail.com (Rhamphoryncus)
Date: Thu, 30 Aug 2007 20:31:08 -0000
Subject: Is LOAD_GLOBAL really that slow?
In-Reply-To: <mailman.152.1188497059.28954.python-list@python.org>
References: <aac2c7cb0708291823h15e3f675mbeae9ecf37d653b6@mail.gmail.com>
	<mailman.130.1188441225.28954.python-list@python.org>
	<1188495447.083333.271540@q4g2000prc.googlegroups.com>
	<mailman.152.1188497059.28954.python-list@python.org>
Message-ID: <1188505868.337081.319790@q4g2000prc.googlegroups.com>

On Aug 30, 12:04 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/30/07, Rhamphoryncus <rha... at gmail.com> wrote:
>
> > On Aug 29, 8:33 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> > > On Wed, 2007-08-29 at 19:23 -0600, Adam Olsen wrote:
> > > There is no loop overhead here, and after subtracting the function call
> > > overhead, I get 31 nanoseconds per local lookup and 63 nanoseconds per
> > > global lookup, so local lookups are just about twice as fast as global
> > > lookups.
>
> __builtins__ lookups are an extra dict lookup slower than just global
> variables, too. Don't forget those.

Heh right, I forgot that.  That's what my benchmark was actually
testing.


> > > True, whether this difference is significant does depend on how many
> > > name lookups your code makes and how much else it's doing, but if you're
> > > doing a lot of number crunching and not a lot of I/O, the difference
> > > might be significant. Also, even if using local names is only slightly
> > > faster than using globals, it's still not slower, and the resulting code
> > > is still more readable and more maintainable. Using locals is a win-win
> > > scenario.
>
> > You get very small speed gains (assuming your code is doing anything
> > significant), for a lot of effort (trying out different options,
> > seeing if they're actually faster on different boxes.)  The
> > readability cost is there, even if it is smaller than many of the
> > other obfuscations people attempt.  If the speed gains were really
> > that important you should rewrite in C, where you'd get far greater
> > speed gains.
>
> I've doubled the speed of a processing loop by moving globals lookups
> out of the loop. Rewriting in C would have taken at least a day, even
> with Pyrex, localizing the lookup took about 2 minutes.

I'm guessing that was due to deep voodoo involving your processor's
pipeline, branch prediction, caching, etc.  I'd be interested in
seeing small examples of it though.


> > So it only seems worthwhile when you really, *really* need to get a
> > slight speedup on your box, you don't need to get any more speedup
> > than that, and C is not an option.
>
> It's not a huge optimization, but it's really easy to write if you
> don't mind adding fake kwargs to your functions. Just for the heck of
> it I also wrote a decorator that will re-write the bytecode so that
> any global that can be looked up at function definition will be
> re-written as a local (actually with LOAD_CONST). You can see it athttp://code.google.com/p/wxpsvg/wiki/GlobalsOptimization. Disclaimer:
> While I've tested it with a variety of functions and it's never broken
> anything, I've never actually used this for anything except an
> intellectual exercise. Use at your own risk.

Doubling the throughput while doing *real work* is definitely more
significant than maybe-or-maybe-not-quite-doubling without any real
work.

--
Adam Olsen, aka Rhamphoryncus



From arkanes at gmail.com  Wed Aug 15 15:02:24 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 15 Aug 2007 14:02:24 -0500
Subject: Move files/directories to Recycle Bin using standard Python libs
In-Reply-To: <f9va80$ciu$1@foggy.unx.sas.com>
References: <f9va80$ciu$1@foggy.unx.sas.com>
Message-ID: <4866bea60708151202t65a05d14w2c1234259e81db3@mail.gmail.com>

On 8/15/07, Kevin D.Smith <Kevin.Smith at sas.com> wrote:
> I would like to move files and directories to the Recycle Bin on
> Windows from Python.  I have found some older articles describing how
> to do this, but they require additional packages to be installed.  I'm
> working on a plugin for an existing project and only have the standard
> library to work with.  Is there a way to use the Recycle Bin using
> standard Python?
>
> --
> Kevin D. Smith


Not easily. The recycle bin is part of the shell, and the shell api
calls have very complicated struct parameters that are cumbersome to
use correctly from ctypes. If you do the work to map the fileop
structs to ctypes you can call the shell API file operation functions
in shell32.dll. This assumes that "standard" for you is Python 2.5,
which has ctypes. Otherwise you are out of luck.


From fonnesbeck at gmail.com  Sun Aug 12 21:22:40 2007
From: fonnesbeck at gmail.com (Chris Fonnesbeck)
Date: Mon, 13 Aug 2007 01:22:40 +0000 (UTC)
Subject: Python not freeing memory (?)
References: <mailman.1882.1186951800.22759.python-list@python.org>
	<46bf8cf5$0$29938$9b622d9e@news.freenet.de>
Message-ID: <loom.20070813T031422-6@post.gmane.org>

Martin v. L?wis <martin <at> v.loewis.de> writes:

> If you want others to help you in finding the bug, you
> need to provide more detail, e.g. a specific piece of
> code that reproducibly wastes memory. If you want to
> study how Python objects are allocated and released,
> you need to create a debug build of Python (and all
> extension modules), and start, e.g., with looking at the
> value of sys.gettotalrefcount() over time.

I tried monitoring the refcount at every iteration, but it
does not change; at the same time, the memory use by the 
python process increases. This is why I suspected that 
python was not returning memory.

Below is the method that gets called iteratively; the *_like methods
are statistical likelihoods implemented in f2py. I dont see
anything that is obviously responsible:

    def model(self):
        # Specification of joint log-posterior
        
        #alpha3 = concatenate(([0], self.alpha3))
        
        # Linear model for surfacing wait time
        #self.lamda = exp(self.alpha0 + self.alpha1 * self.wind + self.alpha2 * 
self.air + alpha3[self.series-1])
        gamma3 = concatenate(([0], self.gamma3))
        
        # Linear model for at-surface probability
        self.theta = invlogit(self.gamma0 + self.gamma1 * self.wind + self.gamma
2 * self.air + gamma3[self.series-1])
        
        x, n, theta = transpose([[z[1], sum(z), t] for z, t in zip(self.downup, 
self.theta) if type(z)!=type(0.0)])
        
        # Binomial likelihood of available animals
        self.binomial_like(x, n, theta, name='theta')
        
        # Probability of availability (per survey)
        self.pa = 1.0 - (1 - self.theta)**10
        
        beta3 = concatenate(([0], self.beta3))
        
        # Linearmodel for probability of detection
        self.pd = invlogit(self.beta0 + self.beta1 * self.wind + self.beta2 * (s
elf.cloud>0) + beta3[self.series-1])
        
        # Binomial likelihood of detection
        self.binomial_like(self.obs, self.present, self.pd * self.pa, name='pd')
        
        zeta1 = concatenate(([0], self.zeta1))
        
        # Probability of presence
        self.pp = invlogit(self.zeta0 + zeta1[self.series-1] + self.zeta2 * self
.intake + self.zeta3 * (self.discharge - self.intake))
        
        # Binomial likelihood of presence
        self.binomial_like(self.present, self.absent + self.present, self.pp, na
me='pp')
        
        # Correct flight counts for detection
        self.N_flight = self.count / (self.pd * self.pa)
        
        # Aggregate counts by series
        N_series = [self.N_flight[self.series==i+1] for i in range(6)]
        
        # Log-normal likelihood for N
        #sum(self.lognormal_like(X, log(N), T) for X, N, T in zip(N_series, self
.N, self.T))
        for N, mu in zip(N_series, self.N):
            self.poisson_like(N, mu)

Thanks in advance for anything that you might suggest.

cf



From skip at pobox.com  Sat Aug 18 18:27:28 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 18 Aug 2007 17:27:28 -0500
Subject: PEP 11 update - Call for port maintainers to step forward
Message-ID: <18119.29264.543717.894262@montanaro.dyndns.org>

I made a quick update to PEP 11, "Removing support for little used
platforms".  I added details about ending support for AtheOS/Syllable and
BeOS.

I also added a yet-to-be-fleshed out section entitled "Platform
Maintainers".  I intend that to the extent possible we document the
responsible parties for various platforms.  Obviously, common platforms like
Windows, Mac OS X, Linux and common Unix platforms (Solaris, *BSD, what
else?)  will continue to be supported by the core Python developer
community, but lesser platforms should have one or more champions, and we
should be able to get ahold of them to determine their continued interest in
supporting Python on their platform(s).  If you are the "owner" of a minor
platform, please drop me a note.  Ones I'm aware of that probably need
specialized support outside the core Python developers include:

    IRIX
    Tru64 (aka OSF/1 and other names (what else?))
    OS2/EMX (Andrew MacIntyre?)
    Cygwin
    MinGW
    HP-UX
    AIX
    Solaris < version 8
    SCO
    Unixware

IRIX and Tru64 are likely to go the way of the dodo if someone doesn't step
up soon to offer support.  I don't expect the others to disappear soon, but
they tend to need more specialized support, especially in more "challenging"
areas (shared library support, threading, etc).

If you maintain the platform-specific aspects for any of these platforms,
please let me know.  If you aren't that person but know who is, please pass
this note along to them.  If I've missed any other platforms (I know I must
have have missed something), let me know that as well.

Thanks,

-- 
Skip Montanaro - skip at pobox.com - http://www.webfast.com/~skip/


From gherron at islandtraining.com  Tue Aug 21 11:42:08 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 21 Aug 2007 08:42:08 -0700
Subject: Python Path Dictionary
In-Reply-To: <1187706985.476483.292820@g4g2000hsf.googlegroups.com>
References: <1187706985.476483.292820@g4g2000hsf.googlegroups.com>
Message-ID: <46CB07D0.7020507@islandtraining.com>

aine_canby at yahoo.com wrote:
> Hi,
>
> Do the Python Paths come in the form of a dictionary where I can
> access a particular path my its key in the registry?
>
> For example, in PythonWin Tools>>Edit Python Paths shows the name as
> well of the address of each path
>
> Thanks,
>
> Aine
>
>   
If by "Python Paths" you mean the list of directories searched when
doing an import, then it is a list (not a dictionary and you can access
it as sys.path.

Here it is on both my Linux and Windows systems:

>>> import sys
>>> sys.path
['', '/usr/lib/portage/pym', '/usr/lib/python25.zip',
'/usr/lib/python2.5', '/usr/lib/python2.5/plat-linux2',
'/usr/lib/python2.5/lib-tk', '/usr/lib/python2.5/lib-dynload',
'/usr/lib/python2.5/site-packages',
'/usr/lib/python2.5/site-packages/Numeric',
'/usr/lib/python2.5/site-packages/PIL',
'/usr/lib/python2.5/site-packages/gtk-2.0']

>>> import sys
>>> sys.path
['', 'C:\\WINDOWS\\system32\\python24.zip', 'C:\\cygwin\\home\\Gary',
'c:\\python24\\DLLs', 'c:\\python24\\lib',
'c:\\python24\\lib\\plat-win', 'c:\\python24\\lib\\lib-tk',
'c:\\python24', 'c:\\python24\\lib\\site-packages',
'c:\\python24\\lib\\site-packages\\Numeric',
'c:\\python24\\lib\\site-packages\\PIL',
'c:\\python24\\lib\\site-packages\\gtk-2.0',
'c:\\python24\\lib\\site-packages\\win32',
'c:\\python24\\lib\\site-packages\\win32\\lib',
'c:\\python24\\lib\\site-packages\\Pythonwin']




From Afro.Systems at gmail.com  Tue Aug 14 05:12:42 2007
From: Afro.Systems at gmail.com (Tzury)
Date: Tue, 14 Aug 2007 02:12:42 -0700
Subject: ctypes, windll question
Message-ID: <1187082762.132865.43630@r34g2000hsd.googlegroups.com>

I followed the tutorial about ctypes and I still cannot figure out how
to call a method of a calss within the dll.

For example:
a dll named 'foo' contain a class named 'bar' which expose a method
named 'baz'.

if I either do:

mydll = windll.foo
mycls = mydll.bar

or
mycls = windll.foo.bar

or
mycls = windll.foo.bar()

I get an erros: "function 'bar' not found " which is true since while
bar is a class. Yet, I need to know how to create an instance of this
inner class so I can access its public methods.



From arkanes at gmail.com  Thu Aug 30 14:57:09 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 30 Aug 2007 13:57:09 -0500
Subject: list index()
In-Reply-To: <1188499525.827573.128170@x35g2000prf.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<1188496588.750629.208100@g4g2000hsf.googlegroups.com>
	<mailman.154.1188497511.28954.python-list@python.org>
	<1188498073.997168.282420@q5g2000prf.googlegroups.com>
	<mailman.156.1188498891.28954.python-list@python.org>
	<1188499525.827573.128170@x35g2000prf.googlegroups.com>
Message-ID: <4866bea60708301157u10ddba4ay14dd003650312450@mail.gmail.com>

On 8/30/07, zzbbaadd at aol.com <zzbbaadd at aol.com> wrote:
>
> > That wish will only come true if you maintain your own fork of Python 3.
> > has_key() will go away, period. It has been made obsolete by "in", which
> > is faster and more concise.
>
> Is there really some reason  "key" IN dict can be implemented faster
> than dict.has_key("key")???
>

Yes. As an exercise, I wont tell you the first most obvious reason -
see if you can figure it out. The dis module may help.


From arunmail at gmail.com  Thu Aug  2 15:43:58 2007
From: arunmail at gmail.com (lazy)
Date: Thu, 02 Aug 2007 19:43:58 -0000
Subject: Berkely Db. How to iterate over large number of keys "quickly"
Message-ID: <1186083838.318952.254370@q3g2000prf.googlegroups.com>

I have a berkely db and Im using the bsddb module to access it. The Db
is quite huge (anywhere from 2-30GB). I want to iterate over the keys
serially.
I tried using something basic like

for key in db.keys()

but this takes lot of time. I guess Python is trying to get the list
of all keys first and probbaly keep it in memory. Is there a way to
avoid this, since I just want to access keys serially. I mean is there
a way I can tell Python to not load all keys, but try to access it as
the loop progresses(like in a linked list). I could find any accessor
methonds on bsddb to this with my initial search.
I am guessing BTree might be a good choice here, but since while the
Dbs were written it was opened using hashopen, Im not able to use
btopen when I want to iterate over the db.



From jstroud at mbi.ucla.edu  Thu Aug 30 21:21:42 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 30 Aug 2007 18:21:42 -0700
Subject: Setting a read-only attribute
In-Reply-To: <1188509700.915517.178440@z24g2000prh.googlegroups.com>
References: <1188509700.915517.178440@z24g2000prh.googlegroups.com>
Message-ID: <fb7qf6$7pq$1@daisy.noc.ucla.edu>

tleeuwenburg at gmail.com wrote:
> I have an object and wish to set an attribute on it which,
> unfortunately for me, is read-only.
> 
> How can I go about this?

Can you simply subclass the object's class, intercept __setattr__ and 
__getattribute__, and spoof the read-only attribute? E.g.:

class A(object):
   def get_ro(self):
     return 'readonly'
   ro = property(get_ro)

class B(A):
   def __setattr__(self, anatt, aval):
      if anatt == 'ro':
        anatt = '_ro'
      super(A, self).__setattr__(anatt, aval)
   def __getattribute__(self, anatt):
     if anatt == 'ro' and hasattr(self, '_ro'):
       anatt = '_ro'
     return super(A, self).__getattribute__(anatt)

The output:

py> class A(object):
...   def get_ro(self):
...     return 'readonly'
...   ro = property(get_ro)
...
py> class B(A):
...   def __setattr__(self, anatt, aval):
...      if anatt == 'ro':
...        anatt = '_ro'
...      super(A, self).__setattr__(anatt, aval)
...   def __getattribute__(self, anatt):
...     if anatt == 'ro' and hasattr(self, '_ro'):
...       anatt = '_ro'
...     return super(A, self).__getattribute__(anatt)
...
py> a = A()
py> print a.ro
readonly
py> a.ro = 4
------------------------------------------------------------
Traceback (most recent call last):
   File "<ipython console>", line 1, in <module>
<type 'exceptions.AttributeError'>: can't set attribute

py>
py> b = B()
py> b.x = 10
py> print b.x
10
py> print b.ro
readonly
py> b.ro = 4
py> print b.ro
4


I'm not so sure this is the least clunky way to do this.

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Aug 28 04:24:00 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 28 Aug 2007 10:24:00 +0200
Subject: How to free memory ( ie garbage collect) at run time with Python
	2.5.1(windows)
In-Reply-To: <1i3hujk.ulsjt32wqtq0N%aleax@mac.com>
References: <1188224306.863247.127890@50g2000hsm.googlegroups.com>
	<1i3hujk.ulsjt32wqtq0N%aleax@mac.com>
Message-ID: <46d3db9b$0$30521$426a74cc@news.free.fr>

Alex Martelli a ?crit :
> rfv-370 <robert.vergnes at yahoo.fr> wrote:
(snip)
>> So how can I force Python to clean the memory and free the memory that
>> is not used?
> 
> On Windows, with Python 2.5, I don't know of a good approach (on Linux
> and other Unix-like systems I've used a strategy based on forking, doing
> the bit that needs a bazillion ints in the child process, ending the
> child process; but that wouldn't work on Win -- no fork).

IIRC, Windows has it's own way to let you launch other processes, so a 
similar strategy might apply here...



From esj at harvee.org  Fri Aug 24 00:17:34 2007
From: esj at harvee.org (Eric S. Johansson)
Date: Fri, 24 Aug 2007 00:17:34 -0400
Subject: unifying many packages under one name
Message-ID: <falm5n$59d$1@sea.gmane.org>

I have a collection of packages and I want to put them under single unifying 
name.  my goal is to reduce namespace pollution and make all these packages 
accessible as 'import vvv.aaa'. In more detail, if I have packages 'aaa' and 
'bbb', what do I do to put those packages under unifying name such as 'vvv'? 
the only way I can see to do it is to create 'vvv' as a directory with its own 
__init__.py but I'm not sure that were work right either.


thanks.



From seun.osewa at gmail.com  Tue Aug 21 20:30:03 2007
From: seun.osewa at gmail.com (Seun Osewa)
Date: Wed, 22 Aug 2007 00:30:03 -0000
Subject: subprocess (spawned by os.system) inherits open TCP/UDP/IP port
In-Reply-To: <mailman.928.1184946783.22759.python-list@python.org>
References: <OuidnfFc6OjhKD3bnZ2dnUVZ_oimnZ2d@comcast.com>
	<mailman.928.1184946783.22759.python-list@python.org>
Message-ID: <1187742603.908139.311350@j4g2000prf.googlegroups.com>

Is it possible to cause this sort of thing to happen on Windows.
Specifically, I'm looking for a way to cause multiple processes to
accept new connections on a bound socket.  on UNIX, I can just fork()
after binding the server socket to a port and the children can
accept() on that same socket, but on Windows, I don't know how to make
that work. Any ideas?  Thanks!

> It doesn't actually move.  Thefiledescriptor is a handle onto the port.
> A port can have multiple handles which refer to it.  When you fork, you
> effectively copy the handle into another process.  Now there are two
> handles onto the same port.  If one of the processes exits, the other one
> still has a handle, and so the port still exists.  If a process forks
> multiple times, then multiple copies are made.  Each process can accept
> connections on the port through its own handle.  Exiting just drops the
> handle, it doesn't close the port.



From mccredie at gmail.com  Tue Aug 14 16:42:53 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Tue, 14 Aug 2007 13:42:53 -0700
Subject: try/finally exceptions dying
In-Reply-To: <1187118591.965164.6120@w3g2000hsg.googlegroups.com>
References: <1187118591.965164.6120@w3g2000hsg.googlegroups.com>
Message-ID: <9e95df10708141342u4c1d3d5dj9e11e5e5e40fc7d7@mail.gmail.com>

> I thought finally always propagated the
> exception all the way up the stack until it was handled.

Finally will propagate the exception up, unless another exception
occurs within the finally block. Since there is not (yet:
http://www.python.org/dev/peps/pep-3134/) exception chaining in
Python, only the last exception to be raised is held onto.

The finally block combined with the recursion makes it impossible to
catch every exception that way.

Something like this might work:

[code]
def dostuff(args):
   stuff
   return status

def run_with_error_handling():
    exceptions = []
    done = False
    while 1:
        try:
          status = dostuff(args)
        except (exception1, exception2), data:
            exceptions.append(data)
            modify status
         finally:
            update args based on status
            break if done
[/code]

Note that in the above example, status could be just a tuple of args.
Then you just need to figure out how to modify the args in the
exception case.

The above leaves a lot of holes though. If you want more help you will
have to send a more complete example.

Matt


From ratchetgrid at googlemail.com  Tue Aug 21 18:33:32 2007
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Tue, 21 Aug 2007 23:33:32 +0100
Subject: Tokenizer for python?
In-Reply-To: <496954360708211405j4ddbf4bfxd0710efbc58682b0@mail.gmail.com>
References: <496954360708211405j4ddbf4bfxd0710efbc58682b0@mail.gmail.com>
Message-ID: <676224240708211533h4507f94bg596cc27808070370@mail.gmail.com>

Hi,

>From your description I think something like PyParsing might be useful to you.

http://pyparsing.wikispaces.com/

If not then I guess I m not understanding your question right.

Hope this helps

Nathan

On 21/08/07, Robert Dailey <rcdailey at gmail.com> wrote:
> Hi,
>
> I am looking for a sort of "tokenizer" for python. I've taken a look at the
> tokenize module, but that seems to parse python code from what I read. I
> want a tokenizer that works a little like boost::tokenizer, however for
> python. Basically I want to be able to pass in an arbitrary string (or line
> from readline()) and specify tokens that cause the string to be separated
> into parts, much like the regular expression split() method (I think that's
> the name of it). Is there anything that already exists that does this, or do
> I need to implement it myself with regular expressions?
>
> Thanks.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From rkmr.em at gmail.com  Fri Aug 10 18:49:59 2007
From: rkmr.em at gmail.com (rkmr.em at gmail.com)
Date: Fri, 10 Aug 2007 15:49:59 -0700
Subject: AttributeError: 'module' object has no attribute 'HTTPSHandler'
In-Reply-To: <9e95df10708101352h45076f1cm36550126b1b548e3@mail.gmail.com>
References: <e04d2e90708100957t79ed5a72s259281d912508fc1@mail.gmail.com>
	<9e95df10708101153j74eb6431kd216503ab6c770ae@mail.gmail.com>
	<9e95df10708101352h45076f1cm36550126b1b548e3@mail.gmail.com>
Message-ID: <e04d2e90708101549y50640f1aic067389992c6d73e@mail.gmail.com>

On 8/10/07, Matt McCredie <mccredie at gmail.com> wrote:
> > I built and installed python 2.5 from source and when I do this:
> > opener = urllib2.build_opener(SmartRedirectHandler(),
> > DefaultErrorHandler(), urllib2.HTTPSHandler())
> > I get this error.
> > AttributeError: 'module' object has no attribute 'HTTPSHandler'

> You need `_ssl.pyd' for HTTPSHandler to work. I guess, try to figure
> out why that wasn't built, then build it. I suppose I _might_ be able
> to give a little more help, but you haven't mentioned what platform
> you are using. Even then, I'm not an expert on building Python.

I am using Fedora Core 4 linux.  Where should I look for _ssl.pyd ? I
am trying to build and use Python-2.5.1


From bgoldenberg at gmail.com  Thu Aug  9 17:58:54 2007
From: bgoldenberg at gmail.com (Benjamin Goldenberg)
Date: Thu, 09 Aug 2007 21:58:54 -0000
Subject: Querying Graphics Card Name
In-Reply-To: <5i1f4cF3mbqqdU1@mid.individual.net>
References: <1186686984.160312.175270@i13g2000prf.googlegroups.com>
	<5i1f4cF3mbqqdU1@mid.individual.net>
Message-ID: <1186696734.059152.131080@d30g2000prg.googlegroups.com>

On Aug 9, 3:26 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Benjamin Goldenberg wrote:
> > I would like to find out the name of the graphics card of the
> > machine my program is running on. I have looked into the pyopengl
> > module, and using them to query the card, but it seems like there
> > ought to be a simpler way to find this out without setting up a
> > glcontext. Does anyone have any ideas?
>
> You could execute glxinfo and look for the renderer string. If
> that's sharp enough for your purpose. Another option is lspci.

I should have clarified. I would like a cross platform implementation,
Windows and *nix. It doesn't seem as if glxinfo is available under
Windows, at least not without installing X11 under cygwin. If
necessary, I can write the *nix and Windows queries separately.

Thanks,
Benjamin



From mikael at isy.liu.se  Wed Aug 15 08:45:57 2007
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Wed, 15 Aug 2007 14:45:57 +0200
Subject: Combinatorial of elements in Python?
In-Reply-To: <9e2f512b0708142203m782b0e10s817fb4d061ba0e46@mail.gmail.com>
References: <9e2f512b0708142203m782b0e10s817fb4d061ba0e46@mail.gmail.com>
Message-ID: <46C2F585.2010407@isy.liu.se>

Sebastian Bassi wrote:
> I have 2 (or more) groups of elements, and I want to get all possible
> unique combinations from all of them. Is there a build-in method to do
> it?
>
> ADictionary={"one":["A","B","C","D"],"two":["H","I"]}
>
> I want to have all possible combinations from "one" and "two", that is:
> [snip]

Not at all complicated. My solution:

 >>> A={'one':['A','B','C','D'],'two':['H','I']}
 >>> [x+y for x in A['one'] for y in A['two']]
['AH', 'AI', 'BH', 'BI', 'CH', 'CI', 'DH', 'DI']

HTH
/MiO

-- 
/Mikael Olofsson
Universitetslektor (Senior Lecturer [BrE], Associate Professor [AmE])
Link?pings universitet

-----------------------------------------------------------------------
E-Mail:  mikael at isy.liu.se
WWW:     http://www.dtr.isy.liu.se/en/staff/mikael
Phone:   +46 - (0)13 - 28 1343
Telefax: +46 - (0)13 - 28 1339
-----------------------------------------------------------------------
Link?pings kammark?r: www.kammarkoren.com   Vi s?ker tenorer och basar! 



From grflanagan at yahoo.co.uk  Thu Aug 16 12:37:47 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: Thu, 16 Aug 2007 09:37:47 -0700
Subject: ploting issues in program
In-Reply-To: <1187250500.571837.196940@19g2000hsx.googlegroups.com>
References: <1187250500.571837.196940@19g2000hsx.googlegroups.com>
Message-ID: <1187282267.317304.237010@57g2000hsv.googlegroups.com>

On Aug 16, 9:48 am, yadin <conra2... at yahoo.com> wrote:
> hi every one!
>
> can you please help me to fix these polar plot in db's
> so that the center is at the minimun negative number in voltagedb
> about [-50]
> and the maximun is at zero and how can i see values on the axis like
> showing that the axes start at -50 -40 -30 .....and end at zero
> than you

Just guessing, does plotting the following rectangular coords give you
any insight?
Seems to be a rough figure of eight.


theta =  [ 4.36332313e-003, 3.18522588e-001, 6.32681854e-001,
9.46841119e-001,
             1.26100038e+000, 1.57515965e+000, 1.88931892e+000,
2.20347818e+000,
             2.51763745e+000, 2.83179671e+000, 3.14595598e+000,
3.46011524e+000,
             3.77427451e+000, 4.08843377e+000, 4.40259304e+000,
4.71675230e+000,
             5.03091157e+000, 5.34507083e+000, 5.65923010e+000,
5.97338936e+000,]


voltage =  [ 0.00363471, 0.26569155, 0.52562334, 0.76330428,
0.93673361, 1.        ,
             0.93321713, 0.75733232, 0.5185449 , 0.25840091,
0.00363471, 0.26569155,
             0.52562334, 0.76330428, 0.93673361, 1.        ,
0.93321713, 0.75733232,
             0.5185449 , 0.25840091,]


from math import *

#dbvoltage = [20*log10(1/v) for v in voltage]
dbvoltage = [-20*log10(v) for v in voltage]

def mkpoint(m, arg):
    return m*sin(arg), m*cos(arg)

graph = [mkpoint(m,arg) for m, arg in zip(dbvoltage, theta)]

for point in graph:
    print point

(0.21288849842373814, 48.790140231909419)
(3.6052811402858937, 10.933359102749559)
(3.303355590073223, 4.505208562238618)
(1.9039899333399253, 1.3706766199218816)
(0.54065408491628131, 0.17306473975245495)
(0.0, 0.0)
(0.57014803194263397, -0.18800662846533356)
(1.9469751572632745, -1.427581247329087)
(3.3327193729963271, -4.6294392863200207)
(3.5834113333756323, -11.194573773272479)
(-0.21288865846549074, -48.790140231211105)
(-3.6052811229041124, -10.933359108481211)
(-3.3033556009317082, -4.5052085542768472)
(-1.9039899297901561, -1.3706766248528219)
(-0.54065408602566212, -0.17306473628675043)
(0.0, 0.0)
(-0.57014803261753888, 0.18800662641861987)
(-1.9469751623879956, 1.4275812403398493)
(-3.3327193896150562, 4.6294392743562476)
(-3.5834113735618405, 11.194573760408771)

Gerard




From chris.hamons at gmail.com  Sun Aug 26 17:31:01 2007
From: chris.hamons at gmail.com (chris.hamons at gmail.com)
Date: Sun, 26 Aug 2007 21:31:01 -0000
Subject: Debugging a curses application in python
In-Reply-To: <1188061484.516090.231200@q5g2000prf.googlegroups.com>
References: <1188061484.516090.231200@q5g2000prf.googlegroups.com>
Message-ID: <1188163861.942093.184120@57g2000hsv.googlegroups.com>

Just to let anyone know who runs across this post, winpdb from (http://
www.digitalpeers.com/pythondebugger/) solved my issue.

--Chris



From grante at visi.com  Wed Aug 15 18:23:20 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 15 Aug 2007 22:23:20 -0000
Subject: Colored text
References: <1186970751.435970.189900@q3g2000prf.googlegroups.com>
Message-ID: <13c6v6opp3mdcd8@corp.supernews.com>

On 2007-08-13, Rohan <vodela.sai at gmail.com> wrote:
> Hello,
> Can some one tell me how do I get colored text. Say when I want to
> write something in a text file , how do I get it colored.

The PyRTF module supports colored text, and RTF is portable
(mostly).

-- 
Grant Edwards                   grante             Yow! What I want to find
                                  at               out is -- do parrots know
                               visi.com            much about Astro-Turf?


From kyosohma at gmail.com  Thu Aug 23 13:03:14 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 23 Aug 2007 10:03:14 -0700
Subject: comparing two lists
In-Reply-To: <mailman.180.1187886381.32294.python-list@python.org>
References: <mailman.180.1187886381.32294.python-list@python.org>
Message-ID: <1187888594.076531.163410@l22g2000prc.googlegroups.com>

On Aug 23, 11:27 am, Ladislav Andel <lad... at iptel.org> wrote:
> Hi,
> what would be the most efficient way to do following?
>
> I have a list of dictionaries  taken from DB e.g.
> dblist = [{'id:1, 'host':'google.com','ip_address':'1.2.3.4'},
> {'id:3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
> {'id:9, 'host':'msn.com','ip_address':'11.3.2.3'}]
>
> and list of object instances in memory(it's just for example)
> which are looping within itself and testing particular hosts
>
> memlist = [<instance 1>,<instance 2>]
> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
> memlist[1].id  is 9 and  memlist[1].host is msn.com etc.
>
> Now I want to add a new instance to memlist since id=3(in dblist) is not
> in memlist.
> How would you iterate through it and insert a new instance?
>
> The result should be:
> memlist = [<instance 1>,<instance 2>, <instance 3>]
> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
> memlist[1].id  is 3 and  memlist[1].host is yahoo.com etc.
> memlist[2].id  is 9 and  memlist[2].host is msn.com etc.
>
> Furthermore, I can have the opposite situation.
> This time I need to remove from memlist a host which is not in dblist.
> How would you do this?
>
> The way how it works is that DBlist is loaded every 10 minutes and
> compares with memlist.
> The memlist should be the same as dblist.
>
> Could you help me, please?
> I'm working on my version of this but somebody might be quicker than me.
> In case I have it done I will post it.
>
> Thanks,
> Lada
>
> There is
>
> and wt

On lists that change in memory, I use the following looping structure:

for i in range(len(in_memory_list)-1,-1,-1)

This loops over the list backwards. I found this method here:
http://mail.python.org/pipermail/python-list/1999-September/012451.html

Hopefully this will fulfill your needs. I've used it to great effect!

Mike



From ricaraoz at gmail.com  Wed Aug 29 07:51:38 2007
From: ricaraoz at gmail.com (=?UTF-8?B?UmljYXJkbyBBcsOhb3o=?=)
Date: Wed, 29 Aug 2007 08:51:38 -0300
Subject: encoding problems
In-Reply-To: <fb3au1$v9m$1@lust.ihug.co.nz>
References: <46d5215b$0$411$426a74cc@news.free.fr>
	<fb3au1$v9m$1@lust.ihug.co.nz>
Message-ID: <46D55DCA.5040601@bigfoot.com>

Lawrence D'Oliveiro wrote:
> In message <46d5215b$0$411$426a74cc at news.free.fr>, tool69 wrote:
> 
>> p2.content = """Ce poste poss?de des accents : ? ? ? ?"""
> 
> My guess is this is being encoded as a Latin-1 string, but when you try to
> output it it goes through the ASCII encoder, which doesn't understand the
> accents. Try this:
> 
> p2.content = u"""Ce poste poss?de des accents : ? ? ? ?""".encode("utf8")
> 

is there a way to sort this string properly (sorted()?)
I mean first 'a' then '?' then 'e' etc. (sorted puts accented letters at
the end). Or should I have to provide a comparison function to sorted?





From hyugaricdeau at gmail.com  Mon Aug 20 17:56:22 2007
From: hyugaricdeau at gmail.com (Hyuga)
Date: Mon, 20 Aug 2007 21:56:22 -0000
Subject: Symbolic Link
In-Reply-To: <1187555373.202634.163160@57g2000hsv.googlegroups.com>
References: <1187475296.173269.263080@k79g2000hse.googlegroups.com>
	<iwWxi.28394$RX.20505@newssvr11.news.prodigy.net>
	<1187555373.202634.163160@57g2000hsv.googlegroups.com>
Message-ID: <1187646982.760523.195750@i38g2000prf.googlegroups.com>

On Aug 19, 4:29 pm, mosscliffe <mcl.off... at googlemail.com> wrote:
> The source file is in an area which python can see, but not the
> browser.  I am trying to make a link in a browser friendly area so I
> can use it to display an image file.

You might want to try using an .htaccess file.  Place a file
called .htaccess in the "browser friendly area" and place in it the
line:

Options +FollowSymLinks

Assuming your hosting service will allow that, then it should work.
If not, then why not just copy the image files?  Storage is cheap
these days.

Hyuga



From gagsl-py2 at yahoo.com.ar  Tue Aug 28 19:18:48 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 28 Aug 2007 16:18:48 -0700
Subject: Chaining programs with pipe
In-Reply-To: <13d84mghdg7990f@corp.supernews.com>
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
	<13cnbi87neru8c3@corp.supernews.com>
	<mailman.97.1187757319.32294.python-list@python.org>
	<13cogr3n6no937b@corp.supernews.com>
	<1187795716.083417.299540@q4g2000prc.googlegroups.com>
	<fau28j$gle$3@lust.ihug.co.nz>
	<mailman.51.1188274035.28954.python-list@python.org>
	<fb0alf$hgr$3@lust.ihug.co.nz>
	<1188290735.746264.280650@y42g2000hsy.googlegroups.com>
	<13d84mghdg7990f@corp.supernews.com>
Message-ID: <1188343128.599432.174880@19g2000hsx.googlegroups.com>

On 28 ago, 09:19, Grant Edwards <gra... at visi.com> wrote:
> On 2007-08-28, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
>
> > On Windows, windowed applications (as opposed to console
> > applications) start with no stdin/stdout/stderr by default.
> > The application developer can modify that if desired, of
> > course - I've menctioned some ways to do that. This fact
> > simply means that those OS's *are* different - most of the
> > time one can ignore the differences, but not always. Neither
> > of them is doing the absolute "Right Thing".
>
> We're never going have any good flames with that sort of
> attitude.  ;)

Does this help with the right attitude?

"How serious can be a system where you can't say 'Open this file using
my preferred application for it'"?

"A 'stream of bytes' was not a good file metaphor even in the 70's -
why still insist on that? How old-fashioned...! Ever read about ADS?"

"Gay-Lussac's Law is not true in chemistry anymore - why insist on
using small integers for all things? I got a PID from a process. I can
see a running process with that same PID. Are they the same? Go
figure!"

- I got this file name from here. Could you please tell me which
character encoding is it using?
- Character encoding? What's that?
- This name has some characters that aren't ASCII obviously, and I
want to know how to interpret them.
- Sorry, I can't help you. The only thing I can see here are byte
sequences.
- But how should I display them? The user is concerned with
characters, not bytes!
- I'm really sorry, there's nothing I can do.
- Could you please forward my request to the file system then?!?!
- FS has no answer either.
- Fu"$&=)==)("$@2@!

:-)

--
Gabriel Genellina



From llasram at gmail.com  Thu Aug 16 02:30:45 2007
From: llasram at gmail.com (Marshall T. Vandegrift)
Date: Thu, 16 Aug 2007 02:30:45 -0400
Subject: Coroutines and argument tupling
References: <mailman.2032.1187207899.22759.python-list@python.org>
	<5ih63mF3pvnt7U1@mid.individual.net> <87k5rwo24e.fsf@seneca.iss.local>
	<1187224267.067743.52150@i13g2000prf.googlegroups.com>
Message-ID: <87fy2kng8a.fsf@seneca.iss.local>

"attn.steven.kuo at gmail.com" <attn.steven.kuo at gmail.com> writes:

> Do you really need a generator or co-routine to do this?  Maybe
> you can just use a closure:

For my trivial example, sure -- there are lots of ways to do it.  Here's
a slightly better example: the `read' method of a file-like object which
sequentially joins the contents of a sequence of other file-like
objects:

    @coroutine
    def read(self, size=-1):
        data = ''
        for file in self.files:
            this = file.read(size - len(data))
            data = ''.join([data, this])
            while this:
                if len(data) == size:
                    _, size = (yield data)
                    data = ''
                this = file.read(size - len(data))
                data = ''.join([data, this])
        yield data
        while True:
            yield ''

-Marshall



From arkanes at gmail.com  Fri Aug 31 12:28:11 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 31 Aug 2007 11:28:11 -0500
Subject: strings (dollar.cents) into floats
In-Reply-To: <fb9eas$tnc$1@sea.gmane.org>
References: <mailman.140.1188483282.28954.python-list@python.org>
	<877incd20i.fsf@benfinney.id.au>
	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
	<1188575044.874256.42960@50g2000hsm.googlegroups.com>
	<fb9eas$tnc$1@sea.gmane.org>
Message-ID: <4866bea60708310928nf54e60dqdd207ccafa8b8a6e@mail.gmail.com>

On 8/31/07, Steve Holden <steve at holdenweb.com> wrote:
> sturlamolden wrote:
> > On 31 Aug, 02:12, Wildemar Wildenburger
> > <lasses_w... at klapptsowieso.net> wrote:
> >
> >> I've heard (ok, read) that several times now and I understand the
> >> argument. But what use is there for floats, then? When is it OK to use them?
> >
> > There are fractions that can be exactly represented by floats that
> > cannot be exactly represented by decimals.
>
> Would you care to give an example?
>
> > There are fractions that
> > can be exactly represented by decimals that cannot be exactly
> > represented by floats.
> >
> > Which one is better? Which do we prefer?
> >
> > What a float cannot do is to represent a decimal fractional number
> > (e.g. 1.1) exactly. If we need that, we cannot use floats. A notable
> > example is monetary computations, it covers 99% of the use for decimal
> > numbers in computers. For this reason, we should never use floats to
> > add 10 cents to a dollar. The use of decimals for monetary
> > calculations is mandatory.
> >
> That last sentence is patent nonsense, and completely untrue. Many
> satisfactory financial applications have been written using only
> floating-point arithmetic. Indeed I believe the accountant's Swiss army
> knife, the Excel spreadsheet, uses floating-point numbers exclusively.
>
This is true, although Excel munges it's FP to provide "expected" results.

It depends on what you consider a "financial" application though.
Excel, while in extremely broad use, is not used to implement any of
the systems which actually "define" money, like the back end financial
systems at banks and credit unions.

In my experience, by far the most common method of calculating
financial numbers is actually using integer amounts, and then applying
well-defined rounding rules which I can't be bothered to look up the
name for.

For what it's worth, the work that I do with money (which is
middleware doing data transport, not calculations or billing) uses
either string representations or fixed point.

> What you say about floating-point have speed advantages is true, but you
> go too far in claiming that decimal arithmetic is mandatory for monetary
> calculations. That's about as sensible as saying that base 12 and base
> 20 arithmetic units were required to calculate in pounds, shillings and
> pence.
>

I believe that to the degree that "real" accounting was done in those
currencies it did in fact use non-decimal bases. Just as people don't
use decimal time values (except us crazy computer folk), you're write
1 pound 4 shillings, not 1.333... pounds.


From kib2 at free.fr  Wed Aug 29 04:53:08 2007
From: kib2 at free.fr (tool69)
Date: Wed, 29 Aug 2007 10:53:08 +0200
Subject: encoding problems
In-Reply-To: <5jkq6pF27cfU1@mid.uni-berlin.de>
References: <46d5215b$0$411$426a74cc@news.free.fr>
	<5jkq6pF27cfU1@mid.uni-berlin.de>
Message-ID: <46d534f4$0$5661$426a74cc@news.free.fr>

Diez B. Roggisch a ?crit :
> tool69 wrote:
> 
>> Hi,
>>
>> I would like to transform reST contents to HTML, but got problems
>> with accented chars.
>>
>> Here's a rather simplified version using SVN Docutils 0.5:
>>
>> %-------------------------------------------------------------
>>
>> #!/usr/bin/env python
>> # -*- coding: utf-8 -*-
> 
> 
> This declaration only affects unicode-literals.
> 
>> from docutils.core import publish_parts
>>
>> class Post(object):
>>      def __init__(self, title='', content=''):
>>          self.title = title
>>          self.content = content
>>
>>      def _get_html_content(self):
>>          return publish_parts(self.content,
>>              writer_name="html")["html_body"]
>>      html_content = property(_get_html_content)
> 
> Did you know that you can do this like this:
> 
> @property
> def html_content(self):
>     ...
> 
> ?
> 

I only took some part of code from someone else
(an old TurboGears tutorial if I remember).

But you're right : decorators are better.

>> # Instanciate 2 Post objects
>> p1 = Post()
>> p1.title = "First post without accented chars"
>> p1.content = """This is the first.
>> ...blabla
>> ... end of post..."""
>>
>> p2 = Post()
>> p2.title = "Second post with accented chars"
>> p2.content = """Ce poste poss?de des accents : ? ? ? ?"""
> 
> 
> This needs to be a unicode-literal:
> 
> p2.content = u"""Ce poste poss?de des accents : ? ? ? ?"""
> 
> Note the u in front.
>  


> 
> You need to encode a unicode-string into the encoding you want it.
> Otherwise, the default (ascii) is taken.
> 
> So 
> 
> print post.html_content.encodec("utf-8")
> 
> should work.
> 

That solved it : thank you so much.

> Diez


From ninja.krmenadl at nes.com  Mon Aug 20 15:14:54 2007
From: ninja.krmenadl at nes.com (Boris Ozegovic)
Date: Mon, 20 Aug 2007 21:14:54 +0200
Subject: I Need help from all the group participants
References: <fac7nj$ci9$1@localhost.localdomain>
	<mailman.0.1187630213.32294.python-list@python.org>
	<fack3a$7kk$1@ss408.t-com.hr>
	<1187636668.436474.289220@o80g2000hse.googlegroups.com>
Message-ID: <facp6k$e0k$1@localhost.localdomain>

dogatemycomputer at gmail.com wrote:

> I would be happy to help but I don't have a clear understand of what
> the poster needs.

Suppose you want to find out what is someone's pulse/heart rate, you can
ask question in many ways, syntaxically, but with same semantic.  One way
to find out someone's pulse is to ask: "What is John's pulse", other is
"Please, tell me, what is Jonh's pulse", or "Send me John's pulse
immediatelly!", etc.  So, if you can write some other question to find out
someone's pulse, please do, but, it would be great if your question would
have different pattern, e.g. "Please, tell me John's pulse immediatelly"
and "Tell me John's pulse right now" have the same pattern, because they
are syntaxically very alike.

-- 
Ne dajte da nas la?ljivac Bandi? truje:
http://cnn.blog.hr/arhiva-2007-06.html#1622776372


From mcl.office at googlemail.com  Sat Aug 25 05:57:24 2007
From: mcl.office at googlemail.com (mosscliffe)
Date: Sat, 25 Aug 2007 02:57:24 -0700
Subject: Joining Big Files
Message-ID: <1188035844.616831.205350@i38g2000prf.googlegroups.com>

I have 4 text files each approx 50mb.

I need to join these into one large text file.

I only need to do this very occasionally, as the problem has occurred
because of upload limitations.

Bearing in mind filesize and memory useage, would I be better reading
every line in every file and writing each line to the output file or
is there someway I could execute some shell command.

I am working on a hosted website with no direct telnet or similar
access.

I would appreciate any tips, best code, as I do not want to break
anything on the website.

Richard



From stef.mientki at gmail.com  Tue Aug 14 13:39:02 2007
From: stef.mientki at gmail.com (stef mientki)
Date: Tue, 14 Aug 2007 19:39:02 +0200
Subject: LEGB rule, totally confused ...
In-Reply-To: <3u*sChSr@news.chiark.greenend.org.uk>
References: <mailman.1959.1187094797.22759.python-list@python.org>
	<3u*sChSr@news.chiark.greenend.org.uk>
Message-ID: <46C1E8B6.6060402@gmail.com>

Sion Arrowsmith wrote:
> stef mientki  <stef.mientki at gmail.com> wrote:
>   
>>    def Run ():
>>        print X                 <=== UnboundLocalError: local variable
>>    'X' referenced before assignment
>>        X = X + 1
>>
>> Why do I get the error ?
>> Printing isn't assigning anything or am I missing something.
>> Now if I remove "X = X + 1" I don't get an error ???
>>     
>
> Several people have already explained the scoping rules acting
> here, but let's just look at how that error message is telling
> you everything you need to know to fix the problem.
>
> "local variable 'X' referenced before assignment"
>
> "local variable 'X'" immediately tells you that the 'X' in
> question is not your global 'X'.
>
> "referenced before assignment": well, 'print X' is surely a
> reference to 'X', and 'X = X + 1' is an assignment to it,
> and 'print X' appears before 'X = X + 1'. That this is the
> key you have confirmed experimentally.
>
> The question to ask here is "Why does Python think 'X' is
> local?" Everything else is answered by the error message.
>
>   
Thanks guys, I beginning to see the light again,
and if X is mutual the story is completely different,
I still have to get used to these differences.

cheers,
Stef Mientki



From arkanes at gmail.com  Thu Aug 16 14:43:14 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 16 Aug 2007 13:43:14 -0500
Subject: Accessing Windows Network Share?
In-Reply-To: <1187287133.737105.169960@19g2000hsx.googlegroups.com>
References: <1187287133.737105.169960@19g2000hsx.googlegroups.com>
Message-ID: <4866bea60708161143u7bce6c01o97397abfb07aa8ee@mail.gmail.com>

On 8/16/07, frikk <frikker at gmail.com> wrote:
> I previously posted about accessing SharePoint over the web. Well I
> have since given up any easy means of doing this, since something else
> has perked my interest.  Instead of going to http://sharepoint/site,
> why not just access \\sharepoint\site\ directly?
>
> So my question is this - How do I access that network share?
>
> If I go to start -> run, and type in "\\SharPointServer\Site\Folder",
> windows explorer will pop up with it.  I suppose I could have a little
> batch script that python runs to map the drive to a local letter, like
> J:, but this does not seem necessary.
>
> Suggestions?
>
> This does not work, for obvious reasons:
> >>> import glob.glob
> >>> glob.glob("\\\\server\\folder\\*")
> []
>

I don't see whats "obvious" about this. Access to windows shares is
handled by Windows in a VFS layer, and glob and all other Python file
access works fine over them for me.


From bignose+hates-spam at benfinney.id.au  Fri Aug 10 10:38:39 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 11 Aug 2007 00:38:39 +1000
Subject: The Future of Python Threading
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
Message-ID: <87ir7n4fps.fsf@benfinney.id.au>

"Justin T." <jmtulloss at gmail.com> writes:

> The truth is that the future (and present reality) of almost every
> form of computing is multi-core, and there currently is no effective
> way of dealing with concurrency.

Your post seems to take threading as the *only* way to write code for
multi-core systems, which certainly isn't so.

Last I checked, multiple processes can run concurrently on multi-core
systems. That's a well-established way of structuring a program.

> We still worry about setting up threads, synchronization of message
> queues, synchronization of shared memory regions, dealing with
> asynchronous behaviors, and most importantly, how threaded an
> application should be.

All of which is avoided by designing the program to operate as
discrete processes communicating via well-defined IPC mechanisms.

-- 
 \      "I can picture in my mind a world without war, a world without |
  `\   hate. And I can picture us attacking that world, because they'd |
_o__)                                never expect it."  -- Jack Handey |
Ben Finney


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Aug 21 05:47:50 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 21 Aug 2007 11:47:50 +0200
Subject: The folder a script is executed in
References: <1187687436.476773.276550@22g2000hsm.googlegroups.com>
	<1187688437.358293.322460@22g2000hsm.googlegroups.com>
Message-ID: <5ivqm3F3rg15jU1@mid.individual.net>

Ant wrote:

> Do you mean the folder containing the script? Or the current
> working directory?
> 
> If the former, then look at os.path.split(sys.argv[0])[0]

test.py:
| #!/usr/bin/env python
| import sys,os
| print os.path.split(sys.argv[0])[0]

$ cd tmp
~/tmp$ ../test.py 
..
~/tmp$ 

That's rather not what's intended. I'd try os.path.abspath(__file__)
instead.

Regards,


Bj?rn

-- 
BOFH excuse #113:

Root nameservers are out of sync



From pyth0nc0d3r at gmail.com  Thu Aug 23 16:55:09 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Thu, 23 Aug 2007 15:55:09 -0500
Subject: How would I compile a Python file to a exe
Message-ID: <eb79828c0708231355o72f9b200g74036aca19f1806c@mail.gmail.com>

Been a while and I'm wondering how I would go about doing it.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070823/9acd2641/attachment.html>

From grante at visi.com  Tue Aug 21 23:32:24 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 22 Aug 2007 03:32:24 -0000
Subject: Chaining programs with pipe
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
Message-ID: <13cnbi87neru8c3@corp.supernews.com>

On 2007-08-21, avishay <avishorp at yahoo.com> wrote:

> I'm trying to chain two programs with a pipe (the output of
> one feeding the input of the other). I managed to capture the
> output and feeding the input of each program independently
> with popen, but how do I tie them together?

On Unix, you do the same thing you would in C. Create a pipe
using os.pipe(), then run one program with stdout connected to
the "write" end of the pipe and the other program with stdin
connected to the "read" end of the pipe.

Or you can take a bit of a shortcut by letting the subprocess
module create the pipe for you:

http://docs.python.org/lib/node536.html

> Is there a solution that works equally on all platforms?

The doc page for subprocess doesn't say what platforms support
it.  I've had a lot of problems trying to use the subprocess
module on windows.  As is typical for Windows, there are all
sorts of special cases that either don't work at all or don't
work the way they should. You pays your money and you takes
your chances.

-- 
Grant Edwards                   grante             Yow!  Sorry, wrong ZIP
                                  at               CODE!!
                               visi.com            


From deets at nospam.web.de  Sun Aug 19 13:14:40 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 19 Aug 2007 19:14:40 +0200
Subject: Hot subject: a good python editor and/or IDE?
In-Reply-To: <mailman.2166.1187530711.22759.python-list@python.org>
References: <mailman.2162.1187525764.22759.python-list@python.org>	<5iqreuF3qanv6U1@mid.individual.net>
	<mailman.2166.1187530711.22759.python-list@python.org>
Message-ID: <5irc4bF3qvd9qU1@mid.uni-berlin.de>

Buchoux S?bastien schrieb:
> Bjoern Schliessmann wrote:
>> S?bastien wrote:
>>  
>>> I am currently using Eclipse+PyDev when developping Python
>>> projects but I lack a fast, simple editor for tiny bit of scripts.
>>> So here is my question: what is, for you, the current best ( but
>>> still kind of light! ) Python editor/IDE ?
>>>     
>>
>> vim
>>
>> BTW, this is an FAQ. Please look through the archives for many
>> threads with many, many IDEs.
>>
>> Regards,
>>
>>
>> Bj?rn
>>
>>   
> Yeah, I know this is a FAQ, but, as you mention, there is a whole bunch 
> of editors, every one of them being updated constantly (+ the new ones 
> getting out). So I am quite sure that looking through the archives is 
> THE solution since it will only reflect what people thought when 
> question was asked. Just type "best Python editor" on Google and you 
> will see that almost all hits are completely out of date.
> Fair enough though! ;)

http://groups.google.de/group/comp.lang.python/browse_thread/thread/77285bd20fafbf2b/75bf35b712b1432b?lnk=st&q=python+editor+comp.lang.python&rnum=1#75bf35b712b1432b

Six weeks don't strike me as "completely out of date".

Diez


From pablo.mitchell at gmail.com  Sun Aug  5 18:29:00 2007
From: pablo.mitchell at gmail.com (pablo.mitchell at gmail.com)
Date: Sun, 05 Aug 2007 15:29:00 -0700
Subject: Efficient Rank Ordering of Nested Lists
In-Reply-To: <1i2c5qo.ynsani1aobwaN%aleax@mac.com>
References: <1186104049.022836.253470@e9g2000prf.googlegroups.com>
	<1i29gpw.1vh7eku1iauistN%aleax@mac.com>
	<1186279182_8217@sp12lax.superfeed.net>
	<1i2c5qo.ynsani1aobwaN%aleax@mac.com>
Message-ID: <1186352940.618342.219710@x40g2000prg.googlegroups.com>

On Aug 4, 7:29 pm, al... at mac.com (Alex Martelli) wrote:
> Cousin Stanley <cousinstan... at gmail.com> wrote:
>
>    ...
>
> >       for i , item in reversed( enumerate( sorted( single_list ) ) ) :
>    ...
> > TypeError: argument to reversed() must be a sequence
>
> Oops, right.  Well then,
>
>     aux_seq = list(enumerate(sorted(single_list)))
>     for i, item in reversed(aux_seq): ...
>
> or the like.
>
> Alex

The particular embedded list I have been tinkering with is 43 x 3884
and the dictionary approach (as you can probably guess) is a big
improvement over the linear one.  It also has the added benefit of
being compatible with Python24.  If I'm not mistaken the binary
approach suggested by Neil requires Python25.  Since in some
situations I don't have control over the version available I will go
with a variant of the dictionary recipe.



From steve at holdenweb.com  Thu Aug  2 06:36:45 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Aug 2007 06:36:45 -0400
Subject: DBUtil with modepython
In-Reply-To: <1186031736.489064.287430@22g2000hsm.googlegroups.com>
References: <1186031736.489064.287430@22g2000hsm.googlegroups.com>
Message-ID: <f8sc41$ac9$1@sea.gmane.org>

cpmishra wrote:
> Hi all
>        I have used DBUtil in mysql databse. when we run to program in
> dos command ,successfully run but when we run in apache server
> (locally)with modepython then given error.Pls give me suggation
> 
> error:
> No module named DBUtils.PooledDB
> 
It seems likely that the web environment doesn't include the directory 
containing the DBUtils (DBUtil?) in the PYTHONPATH variable.

Try running this script as a CGI:

print "Content-Type: text/plain\n"
import os
for val in os.environ.items():
   print "%s=%s" % val

and see what PYTHONPATH looks like.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From ehsan.khoddam at gmail.com  Sat Aug  4 10:10:10 2007
From: ehsan.khoddam at gmail.com (Ehsan)
Date: Sat, 04 Aug 2007 07:10:10 -0700
Subject: regexp problem in Python
In-Reply-To: <1186222973.073756.300890@r34g2000hsd.googlegroups.com>
References: <1186177312.117581.129910@d55g2000hsg.googlegroups.com>
	<1186222973.073756.300890@r34g2000hsd.googlegroups.com>
Message-ID: <1186236610.438810.230580@22g2000hsm.googlegroups.com>

On Aug 4, 1:22 pm, S?nmez Kartal <rainwatch... at gmail.com> wrote:
> On 4 A ustos, 00:41, Ehsan <ehsan.khod... at gmail.com> wrote:
>
>
>
>
>
> > I want to find "http://www.2shared.com/download/1716611/e2000f22/
> > Jadeed_Mlak14.wmv?tsid=20070803-164051-9d637d11"  or 3gp instead of
> > wmv in the text file like this :
> > <html>
> > ""some code""
> > function reportAbuse() {
> >     var windowname="abuse";
> >     var url="/abuse.jsp?link=" + "http://www.2shared.com/file/1716611/
> > e2000f22/Jadeed_Mlak14.html";
> >     OpenWindow =
> > window.open(url,windowname,'toolbar=no,scrollbars=no,resizable=no,width=500?,height=500,left=50,top=50');
> >     OpenWindow.focus();
> >   }
> >   function startDownload(){
> >     window.location = "http://www.2shared.com/download/1716611/
> > e2000f22/Jadeed_Mlak14.wmv?tsid=20070803-164051-9d637d11";
> >     //document.downloadForm.submit();
> >   }
> >   </script>
> > </head>
> > </html>http://www.2shared.com/download/1716611/e2000f22/
> > Jadeed_Mlak14.3gp?tsid=20070803-164051-9d637d11"sfgsfgsfgv
>
> > I use this pattern :
> > "http.*?\.(wmv|3gp).*""
>
> > but it returns only 'wmv' and '3gp' instead of "http://www.2shared.com/
> > download/1716611/e2000f22/Jadeed_Mlak14.wmv?
> > tsid=20070803-164051-9d637d11"
>
> > what can I do? what's wrong whit this pattern? thanx for your comments
>
> You could use r'window.location = "(.*?\.(wmv|3gp)";' as your regex
> string, I guess..- Hide quoted text -
>
> - Show quoted text -

I didn't get what do you mean? i think i must just change the pattern
but I don't know how to find bestfit pattern



From ratchetgrid at googlemail.com  Thu Aug 16 03:09:39 2007
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Thu, 16 Aug 2007 08:09:39 +0100
Subject: Problem using Optional pyparsing
Message-ID: <676224240708160009i3561f8dcid3c62f4f60b850d5@mail.gmail.com>

Hi,

I know this isnt the pyparsing list, but it doesnt seem like there is
one. I m trying to use pyparsing to parse a file however I cant get
the Optional keyword to work. My file generally looks like this:

ALIGNMENT  1020  YS2-10a02.q1k chr09     1295       42    141045
142297   C    1254 95.06 1295 reject_bad_break 0

or this:

ALIGNMENT  36    YS2-10a08.q1k chrm      208      165     10745
10788   C      44 95.45 593 reject_low 10,14

and my grammar work well for these lines, however somethings the row looks like:
ALIGNMENT  53    YS2-10b03.p1k chr12      180      125   1067465
1067520   C      56 98.21 532|5,2 reject_low 25

So I try to parse the 532 using

from pyparsing import *

integer = Word( nums )
float = Word( nums+".")
identifier = Word( alphanums+"-_." )

alignment = Literal("ALIGNMENT ").suppress()
row_1 = integer.setResultsName("row_1")#.setParseAction(make_int)
src_id = identifier.setResultsName("src_id")
dest_id = identifier.setResultsName("dest_id")
src_start = integer.setResultsName("src_start")#.setParseAction(make_int)
src_stop = integer.setResultsName("src_stop")#.setParseAction(make_int)
dest_start = integer.setResultsName("dest_start")#.setParseAction(make_int)
dest_stop = integer.setResultsName("dest_stop")#.setParseAction(make_int)
row_8 = oneOf("F C").setResultsName("row_8")
length = integer.setResultsName("length")#.setParseAction(make_int)
percent_id = float.setResultsName("percent_id")#.setParseAction(make_float)
row_11 = integer + Optional(Literal("|") + commaSeparatedList )
)#.setResultsName("row_11")#.setParseAction(make_int)
result = Word(alphas+"_").setResultsName("result")
row_13 = commaSeparatedList.setResultsName("row_13")

def make_alilines_status_parser():
    return alignment + row_1 + src_id + dest_id + src_start + src_stop
+ dest_start + dest_stop + row_8 + length + percent_id + row_11 +
result + row_13

def parse_alilines_status(ifile):
    alilines = make_alilines_status_parser()
    for l in ifile:
        yield alilines.parseString( l )

However my parser always fails on lines of type 3. Does anyone know
why the Optional part is not working.

Many Thanks in advance

Nathan


From alanmk at hotmail.com  Tue Aug 14 13:54:58 2007
From: alanmk at hotmail.com (Alan Kennedy)
Date: Tue, 14 Aug 2007 10:54:58 -0700
Subject: JPype - passing to Java main
In-Reply-To: <1187097639.176267.33050@d55g2000hsg.googlegroups.com>
References: <1187040070.806416.75090@r34g2000hsd.googlegroups.com>
	<mailman.1941.1187047345.22759.python-list@python.org>
	<1187095969.789811.63960@j4g2000prf.googlegroups.com>
	<f9s972$hd2$1@news2.u-psud.fr>
	<1187097639.176267.33050@d55g2000hsg.googlegroups.com>
Message-ID: <1187114098.399251.62790@22g2000hsm.googlegroups.com>

> -------------ERROR_-------------
>   File "tester.py", line 10, in <module>
>     com.JPypeTest.main("arg")
> RuntimeError: No matching overloads found. at src/native/common/
> jp_method.cpp:121
> ----------END ERROR-------------

I haven't used jpype, but the signature for java main functions is

public static void main (String [] args)

So try com.JPypeTest.main(["arg"])

Note the addition of square brackets to create a *list* of arguments,
which presumably jpype will transform into a java String[].

Alan.



From kyosohma at gmail.com  Fri Aug 24 11:49:12 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 24 Aug 2007 08:49:12 -0700
Subject: creating a tar file with python
In-Reply-To: <mailman.256.1187969609.32294.python-list@python.org>
References: <93066C069973ED448DC2BCEA9C44A7383BE2EB@efmailx>
	<faktv8$8fs$1@sea.gmane.org>
	<93066C069973ED448DC2BCEA9C44A7383BE2ED@efmailx>
	<46CE4D3D.7020106@holdenweb.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2EE@efmailx>
	<1187969070.3385.20.camel@dot.uniqsys.com>
	<mailman.256.1187969609.32294.python-list@python.org>
Message-ID: <1187970552.537218.202160@x35g2000prf.googlegroups.com>

On Aug 24, 10:33 am, Ed Leafe <e... at leafe.com> wrote:
> On Aug 24, 2007, at 11:24 AM, Carsten Haese wrote:
>
> > You clearly have no idea who you're talking to. I suggest you
> > Google for
> > '"Steve Holden" Python' to get a clue. Good luck finding any more help
> > here.
>
>         Even if it were Joe Nobody to whom he was directing those comments,
> it was *way* out of line. The fact that it was Steve only reinforces
> the cluelessness of the writer.
>
> -- Ed Leafe
> --http://leafe.com
> --http://dabodev.com

Where is this guy posting his code? I see a lot of responses from
Steve and Gabriel to posts that never seem to begin anywhere. Are
these posts originating from the noob python list and somehow getting
cross-posted here?

I like Steve, but he seems pretty crabby/rude much of the time.

Mike



From deets at nospam.web.de  Wed Aug  8 09:21:59 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 08 Aug 2007 15:21:59 +0200
Subject: How to avoid reverse code engineering of a python executable
References: <1186573228.419760.272240@k79g2000hse.googlegroups.com>
	<5htp32F3md0abU2@mid.uni-berlin.de>
Message-ID: <5htubnF3lttkaU1@mid.uni-berlin.de>

Marc 'BlackJack' Rintsch wrote:

> On Wed, 08 Aug 2007 11:40:28 +0000, NicolasG wrote:
> 
>> Couple of day's ago I asked for your help on how to create a single
>> file of a python executable. Now I want to proceed a little bit
>> further asking how can I avoid (or at least make it difficult) for
>> some one to extract my code by using reverse code engineer techniques?
>> I came on pyobfuscate but I would like more suggestions and guide to
>> achieve the most possible security in this matter.
> 
> Just don't deliver the code at all but provide a webservice.
> 
> Everything else can be reverse engineered and possibly will be if it is
> worth the trouble.

Most things aren't. Even if one thinks so. The efforts put into reverse
engineering software usually don't stem from the desire to rip code one
couldn't write self, but to e.g. circumvene registration keys or otherwise
locked software.

Diez


From steven.bethard at gmail.com  Mon Aug 13 12:26:22 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 13 Aug 2007 10:26:22 -0600
Subject: is there anybody using __del__ correctly??
In-Reply-To: <1186984722.604498.39490@q75g2000hsh.googlegroups.com>
References: <1186731369.073644.158490@z24g2000prh.googlegroups.com>
	<1186762908.121319.35900@x35g2000prf.googlegroups.com>
	<SradnX_-hI91BiHbnZ2dnUVZ_r6rnZ2d@comcast.com>
	<1186895084.388293.295330@57g2000hsv.googlegroups.com>
	<0M2dnWsFO7-zwSLbnZ2dnUVZ_ryqnZ2d@comcast.com>
	<1186984722.604498.39490@q75g2000hsh.googlegroups.com>
Message-ID: <gdSdnYEt6sysG13bnZ2dnUVZ_hynnZ2d@comcast.com>

Michele Simionato wrote:
> SPECIALMETHODS = ['__%s__' % name for name in
> '''
> abs add and call concat contains delitem delslice div eq floordiv ge
> getitem
> getslice gt iadd iand iconcat idiv ifloordiv ilshift imod imul index
> inv invert
> ior ipow irepeat irshift isub iter itruediv ixor le len lshift lt mod
> mul ne neg
> not or pos pow repeat repr rshift setitem setslice str sub truediv
> xor
> '''.split()]
> 
> def add_special_method(cls, name):
>     def meth(self, *args):
>         return getattr(self, name)(*args)
>     meth.__name__ = name
>     setattr(cls, name, meth)
> for name in SPECIALMETHODS:
>     add_special_method(Impostor, name)
> 
> In this way the Impostor can emulate even the special methods. Here is
> an example:
> 
>>>> class C(object):
> ...
> pass
> ...
>>>> c=Impostor(C())
>>>> print c
> <__main__.C object at 0x102a390>
> 
> Notice that the impostor is calling the __str__ method of C, so it
> really looks like a C object. Moreover
> 
>>>> c.__class__
> <class '__main__.C'>
> 
> and
> 
>>>> isinstance(c, C)
> True
> 
> so the Impostor is doing a damn pretty good job of imposture for C
> objects. Of course it does what it can, and it cannot impersonate C
> objects completely:
>
>>>> type(c)
> <class '__main__.Impostor'>
> 
> so code using checks like ``type(c) is C`` would break and the
> approach here cannot be considered more than a hack.

That's fun. =)

I don't really think it's too much of a hack either. ``type(c) is C`` is 
expected to fail for proxy classes, which is why everyone keeps getting 
told to use ``isinstance(c, C)`` instead.  In Py3K, when ``isinstance`` 
becomes overloadable, it's going to be even more of a mistake to write 
``type(c) is C``.

That said, I doubt I'd want to slow down all attribute access on my 
class just to do some cleanup, when it's probably better to just tell 
everyone to use a ``with`` block. ;-)

STeVe


From sbellon at sbellon.de  Thu Aug  2 15:15:38 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Thu, 2 Aug 2007 21:15:38 +0200
Subject: Catching SystemExit in C API code when embedding Python?
References: <20070802141906.2581c099@cube.tz.axivion.com>
Message-ID: <20070802211538.142fc74b@cube.tz.axivion.com>

First of all, I'm sorry to followup my own posting, but I can add a few
things ...

On Thu, 02 Aug, Stefan Bellon wrote:

> As in Python itself you can catch SystemExit, I think this should be
> the way to go. But how do I catch this exception from within the C
> API?

I now installed an exception hook in sys.excepthook on the C side. And
indeed, it gets called whenever an exception is raised ... but not when
SystemExit is raised. And indeed, in PyErr_PrintEx in pythonrun.c I
found the following:

        hook = PySys_GetObject("excepthook");
        if (hook) {
                PyObject *args = PyTuple_Pack(3,
                    exception, v ? v : Py_None, tb ? tb : Py_None);
                PyObject *result = PyEval_CallObject(hook, args);
                if (result == NULL) {
                        PyObject *exception2, *v2, *tb2;
                        if (PyErr_ExceptionMatches(PyExc_SystemExit)) {
                                handle_system_exit();
                        }

But ... then my original question becomes even stronger: How do I
"catch" a SystemExit when embedding Python and not wanting that a
script with sys.exit just terminates the whole application?

-- 
Stefan Bellon


From steve at holdenweb.com  Mon Aug  6 14:18:00 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Aug 2007 14:18:00 -0400
Subject: Tkinter or wxpython?
In-Reply-To: <4866bea60708061043x34fb94edg8b675eb1608af9b1@mail.gmail.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>	<mailman.1550.1186099225.22759.python-list@python.org>	<1186410331.905174.21370@q3g2000prf.googlegroups.com>	<7xps204tin.fsf@ruckus.brouhaha.com>	<mailman.1677.1186412323.22759.python-list@python.org>	<7xlkcopu4r.fsf@ruckus.brouhaha.com>	<mailman.1680.1186416061.22759.python-list@python.org>	<7x3aywr4tc.fsf@ruckus.brouhaha.com>
	<4866bea60708061043x34fb94edg8b675eb1608af9b1@mail.gmail.com>
Message-ID: <f97okn$qve$1@sea.gmane.org>

Chris Mellon wrote:
> On 06 Aug 2007 09:44:15 -0700, Paul Rubin
> <"http://phr.cx"@nospam.invalid> wrote:
>> "Chris Mellon" <arkanes at gmail.com> writes:
[...]
>> Again, it all depends on what you're trying to do.  For data entry
>> stuff you probably want the data on a remote server anyway, and you
>> can do basic CRUD validation with fairly simple javascript.  Maybe
>> that departs from pure HTML but it's nothing like the ajax/dhtml
>> madness that causes the problems you've described.
>> --
> 
> CRUD with javascript is something I actually have a lot of experience
> with. Deficiencies in the data entry UI have real consequences because
> you get invalid data and slow data entry speeds. The auto-completing
> combo-box, for example, is simply impossible in a browser without
> quite complicated (and slow) DHTML and is a huge boon for data entry.
> 
It's not even that easy in wxPython is you choose the wrong widget - I 
tried to make a combo box accept text and select the drop-down elements 
from a database and it turned out to be way too tricky to manage easily.

Having said that, I quickly discovered superior alternatives once I got 
rid of my "it has to be a combo box" mentality. While great GUIs have 
been created as web front-ends it is substantially more difficult to 
create them than it is with a simple-ish GUI toolkit like wxPython, 
particularly with a GUI designer like wxDesigner behind it.

> I'm not trying to claim that there are no benefits to web
> applications. But I often see people touting the web as a *superior
> application platform*, which is simply false, and as innately simpler
> to develop for, which is also false.

I would agree. The inherent state-maintenance and interaction problems 
have caused the ASP.NET model to be somewhat counterintuitive, to say 
the least, though it *has* made it easier to build complex interfaces 
that it is on the "raw web". As with all such things, though, once you 
run into the limits of the model, the promise of "point-and-click 
programming" rapidly becomes a dim memory.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From horpner at yahoo.com  Tue Aug  7 14:31:46 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 07 Aug 2007 18:31:46 GMT
Subject: Dealing with multiple excel sheets
References: <1186509914.117596.249330@j4g2000prf.googlegroups.com>
Message-ID: <slrnfbhe9b.so.horpner@FIAD06.norwich.edu>

On 2007-08-07, Rohan <vodela.sai at gmail.com> wrote:
> I would like to write a script which does the following job.
> Take column1 and 7 from 10 different excel sheets and pasthe
> them into a new excel worksheet. Any ideas on how to do it

Get the xlrd Python module. It'll come in handy.

-- 
Neil Cerutti


From tjreedy at udel.edu  Fri Aug  3 15:18:43 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 3 Aug 2007 15:18:43 -0400
Subject: Trying to find zip codes/rest example
References: <f8vhct$3g6$1@sea.gmane.org>
Message-ID: <f8vv2k$i1f$1@sea.gmane.org>


"VanL" <van.lindberg at gmail.com> wrote in message 
news:f8vhct$3g6$1 at sea.gmane.org...
|
| I now cannot find this demo and the associated discussion.  Does anybody
| remember this demo and where I might be able to find it?

No, but does the localflavor entry on
http://code.djangoproject.com/browser/django/trunk/docs/add_ons.txt?rev=5118
help? (found with Google) 





From ldo at geek-central.gen.new_zealand  Sat Aug 25 08:55:35 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 26 Aug 2007 00:55:35 +1200
Subject: Threading problem when many sockets open
References: <mailman.1865.1186871554.22759.python-list@python.org>
Message-ID: <fap8nk$ue4$2@lust.ihug.co.nz>

In message <mailman.1865.1186871554.22759.python-list at python.org>, Philip
Zigoris wrote:

> ... and the server
> would go into a state where the master thread repeatedly polled the
> socket and printed an error.

Is that because it cannot create a new socket to accept the connection on?


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 24 11:05:12 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 24 Aug 2007 17:05:12 +0200
Subject: Server-side scripting in python
In-Reply-To: <1187954190.571860.85920@m37g2000prh.googlegroups.com>
References: <1187614732.519547.296020@j4g2000prf.googlegroups.com>
	<gi6rp4-mes.ln1@lairds.us>
	<1187755436.972359.293360@i13g2000prf.googlegroups.com>
	<0k2up4-lla.ln1@lairds.us>
	<1187843960.922925.127990@i13g2000prf.googlegroups.com>
	<46ceb673$0$415$426a74cc@news.free.fr>
	<1187954190.571860.85920@m37g2000prh.googlegroups.com>
Message-ID: <46cef36a$0$431$426a34cc@news.free.fr>

olive a ?crit :
>> Yes : have a look at Pylons too. It's actually quite less 'polished'
>> than Django, but it's IMHO going in the right direction (as a matter of
>> fact, Turbogears 2.0 - another well-known Python MVC framework -  will
>> be based on Pylons...). Django is clearly more oriented toward
>> content-management, which might not be what you want for this project.
> 
> this opinion about Django is a little bit dated

Possibly. I worked with pre 1.0 versions, then switched to other 
solutions (there were things I didn't like that much in Django... 
personal taste, not a criticism).

> 
> Django is really multi-purpose and is rarely use as a CMS,
(snip)
> I would use Plone instead as a general CMS.

I meant it was more oriented toward *building* CMS - not that it was a 
CMS by itself.

And as far as I'm concerned, I would not use Plone without *really* 
needing such a heavyweight thingie (and yes, I do have recent working 
experience with Plone...).




From wolf_tracks at invalid.com  Thu Aug 23 10:38:56 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Thu, 23 Aug 2007 14:38:56 GMT
Subject: Baby Steps, optionDB
In-Reply-To: <mailman.169.1187874026.32294.python-list@python.org>
References: <Uk7zi.1531$vU4.979@nlpi068.nbdc.sbc.com>	<1187862216.183609.89810@r23g2000prd.googlegroups.com>	<Pcezi.6450$924.6108@newssvr23.news.prodigy.net>
	<mailman.169.1187874026.32294.python-list@python.org>
Message-ID: <4_gzi.30161$RX.21287@newssvr11.news.prodigy.net>

VBasic is the same. Longish. The ultimate in conciseness was APL.

Carsten Haese wrote:
> On Thu, 2007-08-23 at 04:30 -0700, W. Watson wrote:
>> I used to program in C++, and there's one thing I've never liked about 
>> OOP. Too much typing!
> 
> Blame C++, not OOP. In time, you will find that Python's approach to OOP
> in particular and to programming in general allows you to express your
> ideas more concisely than you could in other programming languages.
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From arkanes at gmail.com  Fri Aug 10 15:46:26 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 10 Aug 2007 14:46:26 -0500
Subject: wxPython before MainLoop
In-Reply-To: <6a6dnfbbFJNzcCbbnZ2dnUVZ_oudnZ2d@comcast.com>
References: <13bl9a75laqcm70@corp.supernews.com>
	<6a6dnfbbFJNzcCbbnZ2dnUVZ_oudnZ2d@comcast.com>
Message-ID: <4866bea60708101246w3026d6f4k53cf66745fe813cc@mail.gmail.com>

On 8/9/07, Heikki Toivonen <heikki at osafoundation.org> wrote:
> [david] wrote:
> > I'd like to refresh the display before I start the main loop.
>
> We have this kind of situation in Chandler, where we display and update
> the splash screen before we enter MainLoop.
>
> 1. Create app object
>    http://lxr.osafoundation.org/source/chandler/Chandler.py#080
>
> 2. During app object creation, in OnInit, put up splash screen and update it
>
> http://lxr.osafoundation.org/source/chandler/application/Application.py#433
>
> 3. The splash screen refresh is basically: draw new stuff,
> self.Layout(), self.Update(), wx.Yield()
> http://lxr.osafoundation.org/source/chandler/application/Application.py#1421
>
> 3. Start MainLoop
>    http://lxr.osafoundation.org/source/chandler/Chandler.py#086
>

wxYield spins the event loop in place. This can have some serious
consequences if you aren't very careful with your usage, like
recursively entering event handlers. I generally consider it an
experts only interface, and avoid it.

Thankfully, in Python 2.5 you can do some very nice things with
Pythons generators. Basically, replace your wxYielding code with a
python generator that just yields where you used to wxYield, and then
call your generator repeatedly with wx.CallAfter.

Here's an (unpolished) example of a progress dialog that is updated
via generator:

import wx


def startupTask():
    for ii in xrange(1001):
        cont, skip = yield ii, "step %s"%str(ii)
        if not cont:
            raise StopIteration



class GeneratorProgress(wx.ProgressDialog):
    """ Progress dialog fed via generator.
    Task let should be a python generator that yields (value, message) tuples
    and is sent (continue, skip) tuples, as per the arguments to and return
    values from the wx.ProgressDialog.Update method.
    """
    def __init__(self, title, message, tasklet, *args, **kwargs):
        super(GeneratorProgress, self).__init__(title, message, *args, **kwargs)
        self.tasklet = tasklet
        wx.CallAfter(self.iterate)

    def iterate(self, cont=None, skip=None):
        try:
            if cont is None and skip is None:
                value, msg = self.tasklet.next()
            else:
                value, msg = self.tasklet.send((cont, skip))
            cont, skip = self.Update(value, msg)
            wx.CallAfter(self.iterate, cont, skip)
        except StopIteration:
            self.Destroy()

def main():
    app = wx.App(False)
    f = wx.Frame(None)
    pg = GeneratorProgress("Startup", "running task...",
startupTask(), parent=f, maximum=1000)
    pg.Show()
    f.Show()
    app.MainLoop()

if __name__ == '__main__':
    main()


From bronger at physik.rwth-aachen.de  Fri Aug 24 11:59:22 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 24 Aug 2007 17:59:22 +0200
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<87tzqpew22.fsf@wilson.homeunix.com> <fal3cv$bi2$1@panix3.panix.com>
	<87tzqp77my.fsf@wilson.homeunix.com> <famljb$1d9$1@panix3.panix.com>
Message-ID: <87y7g0udnp.fsf@wilson.homeunix.com>

Hall?chen!

Aahz writes:

> Torsten Bronger  <bronger at physik.rwth-aachen.de> wrote:
>
>> [...]
>>
>> reStructuredText, AsciiDoc, and some others focus on source code
>> documentation, or on software documentation.  In contrast to
>> that, our markup should be suitable for PhD theses, papers and
>> the like.  Thus, it has weaker means for code snippets, RFC
>> citation etc, but rich syntax for bibliographic entries, index
>> entries, math, and floating figures.
>
> Enh.  reST is intended to be a general-purpose system.  It's
> certainly extensible, and I've added code for index entries
> myself.

I like reST very much, and it is used for all documentation in the
"Gummi" source files.  I could probably use it as a starting point
for the features that I want but the same is true for AsciiDoc or
MediaWiki.  I doubt, however, that the resulting syntax is what I
want (see below).

> There has been some recent activity on improving bibliographic
> support, and I believe some people are working on integrating
> MathML.

But I hope only for the backend side?

>> Additionally, input methods simplify using characters like ??,
>> ???, or ???.
>
> "Everyone" says to just use a Unicode editor.  Long-term, I think
> that's what's going to happen -- you're starting your project too
> late for this to make much sense.

Well, your newsreader failed to specify UTF-8, and my newsreader
failed to do a proper auto-detect.  So, Unicode has not arrived yet.
;-)

Seriously: Most people can't enter those characters.  In LaTeX, you
can use many Unicode characters directy for years, however, only few
documents make use of this.  To most people, it's probably simpler
to write \alpha than to find and use the Unicode-insertion tool of
their editor.

> [...]
>
> Then you're really caught between a rock and a hard place.  LaTeX
> is extremely well-entrenched;

But only in a small group (compared to Word for example).

The main motivation of our group was to see that many people stay
away from LaTeX because it is too complicated.  The basic assertion
of our project is that this complexity is not necessary while still
maintaining important features of LaTeX (plain text file format,
semantic markup).  It is a tradeoff, though: You give up a lot of
flexibility.  However, I think that this particular type of
flexibility (namely, local layout tweaking) is of minor
importance.

Probably one important thing that didn't get through yet is that we
try to get people to semantic markup who don't come from engineering
or science.  These are heavily under-represented in the LaTeX
community.  "Gummi" (or however we'll call it) is not supposed to be
another Geek language.  On the contrary, our goal is that even a
typical linguistics student loves to write their seminar paper with
"Gummi".

Reading only forums and newsgroups, one may think that this is
impossible but in real life, I've seen more people using LaTeX
exactly once and never again than people who keep using it.  If I
look at typical modern LaTeX preambles, I know what went wrong, so I
see a lot of potential.

However, then a very defensively constructed syntax is crucial, and
everything must just work -- without having to use a tool chain or
declaring things before you can use them.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From countblabula at yahoo.com  Mon Aug  6 13:51:20 2007
From: countblabula at yahoo.com (Lee Fleming)
Date: Mon, 06 Aug 2007 10:51:20 -0700
Subject: Something in the function tutorial confused me.
In-Reply-To: <mailman.1683.1186421435.22759.python-list@python.org>
References: <1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<mailman.1683.1186421435.22759.python-list@python.org>
Message-ID: <1186422680.103021.105230@l70g2000hse.googlegroups.com>

On Aug 6, 12:30 pm, "Hamilton, William " <wham... at entergy.com> wrote:
> When you call f(23), the variable y within it gets created and points at
> None.  When f(23) exits, the y that it created gets destroyed.  (Well,
> goes out of scope, but even if it's not garbage collected it won't ever
> come back into scope.)  When you then call f(24), a new y is created
> that also points to None, and disappears forever when f(24) exits.
>
> The values in a def statement are created when the def is executed, but
> the variables are only created when the function is actually called, and
> new ones are created every time the function is called.
>
> --
> -Bill Hamilton- Hide quoted text -
>
> - Show quoted text -

why isn't the y in def f (x, y = []): something
garbage-collected?



From wolf_tracks at invalid.com  Thu Aug 23 00:32:20 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Thu, 23 Aug 2007 04:32:20 GMT
Subject: Baby Steps, optionDB
In-Reply-To: <1187843018.391276.303410@z24g2000prh.googlegroups.com>
References: <Uk7zi.1531$vU4.979@nlpi068.nbdc.sbc.com>
	<1187843018.391276.303410@z24g2000prh.googlegroups.com>
Message-ID: <o58zi.29778$RX.9996@newssvr11.news.prodigy.net>

Don't even know what the file is. I figured the book would have included it 
in the example. I see no mention of it in the index. Does it go by another name?

BartlebyScrivener wrote:
> On Aug 22, 10:41 pm, "W. Watson" <wolf_tra... at invalid.com> wrote:
> 
>>     clError: couldn't open "optionDB": no such file or directory
> 
> Because the file doesn't exist?
> 
> Did you make an optionDB file?
> 
> http://tinyurl.com/283o98
> 
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From aboudouvas at panafonet.gr  Mon Aug 13 09:20:51 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Mon, 13 Aug 2007 06:20:51 -0700
Subject: Eclipse/PyDev question
In-Reply-To: <1187006912.494455.86830@w3g2000hsg.googlegroups.com>
References: <1186998539.030727.279330@g4g2000hsf.googlegroups.com>
	<1187005485.137101.43130@l70g2000hse.googlegroups.com>
	<1187006912.494455.86830@w3g2000hsg.googlegroups.com>
Message-ID: <1187011251.632213.249450@g4g2000hsf.googlegroups.com>

Ah, i forgot another one:

as any project evolves, you need to organize it in directories. So, i
have a project named "Dev" and Eclipse has provided me (in Navigator)
with "Dev" and "Src". Inside Src i put my .py files. Let's say that i
want to create a directory there (will i make it in "Src" or in "Dev")
to put other .py files. I tried adding a "Folder", i also tried to add
a "Pydev Source Folder", either way i cannot refer to these files from
a .py located in Src directory with the usual "from folderA
import"...It does not understand the folder structure and i am pretty
sure i am missing something obvious here...



From steve at holdenweb.com  Fri Aug 10 06:57:20 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Aug 2007 06:57:20 -0400
Subject: The Future of Python Threading
In-Reply-To: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
Message-ID: <f9hgaf$oon$1@sea.gmane.org>

Justin T. wrote:
> Hello,
> 
> While I don't pretend to be an authority on the subject, a few days of
> research has lead me to believe that a discussion needs to be started
> (or continued) on the state and direction of multi-threading python.
[...]
> What these seemingly unrelated thoughts come down to is a perfect
> opportunity to become THE next generation language. It is already far
> more advanced than almost every other language out there. By
> integrating stackless into an architecture where tasklets can be
> divided over several parallelizable threads, it will be able to
> capitalize on performance gains that will have people using python
> just for its performance, rather than that being the excuse not to use
> it.
> 
Aah, the path to world domination. You know you don't *have* to use 
Python for *everything*.

> The nice thing is that this requires a fairly doable amount of work.
> First, stackless should be integrated into the core. Then there should
> be an effort to remove the reliance on the GIL for python threading.
> After that, advanced features like moving tasklets amongst threads
> should be explored. I can imagine a world where a single python web
> application is able to redistribute its millions of requests amongst
> thousands of threads without the developer ever being aware that the
> application would eventually scale. An efficient and natively multi-
> threaded implementation of python will be invaluable as cores continue
> to multiply like rabbits.
> 
Be my guest, if it's so simple.

> There has been much discussion on this in the past [2]. Those
> discussions, I feel, were premature. Now that stackless is mature (and
> continuation free!), Py3k is in full swing, and parallel programming
> has been fully realized as THE next big problem for computer science,
> the time is ripe for discussing how we will approach multi-threading
> in the future.
> 
I doubt that a thread on c.l.py is going to change much. It's the 
python-dev and py3k lists where you'll need to take up the cudgels, 
because I can almost guarantee nobody is going to take the GIL out of 
2.6 or 2.7.

> 
> [1] I haven't actually looked at the GIL code. It's possible that it
> creates a bunch of wait queues for each nice level that a python
> thread is running at and just wakes up the higher priority threads
> first, thus maintaining the nice values determined by the scheduler,
> or something. I highly doubt it. I bet every python thread gets an
> equal chance of getting that lock despite whatever patterns the
> scheduler may have noticed.
> 
It's possible that a little imp tosses a coin and decides which thread 
gets to run next. The point of open source is that it's easy to dispel 
ignorance and make your own changes if you are competent to do so. Talk 
is cheap, code is costly. Your bet is worth nothing. Is it even possible 
to run threads of the same process at different priority levels on all 
platforms?

> [2]
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/7d16083cf34a706f/858e64a2a6a5d976?q=stackless%2C+thread+paradigm&lnk=ol&
> http://www.stackless.com/pipermail/stackless/2003-June/000742.html
> ... More that I lost, just search this group.
> 
Anyone who's been around Python for a while is familiar with the issues. 
Have you actually asked Chris Tismer whether he's happy to see Stackless 
go into the core? He was far from certain that would be a good idea at 
PyCon earlier this year. He probably has his reasons ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From sturlamolden at yahoo.no  Sun Aug 19 09:29:22 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: Sun, 19 Aug 2007 06:29:22 -0700
Subject: best GUI library for vector drawing program
In-Reply-To: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
Message-ID: <1187530162.698816.280140@50g2000hsm.googlegroups.com>

On Aug 17, 3:27 pm, chewie54 <dfabrizi... at gmail.com> wrote:

> What would be the best cross-platform GUI library to use for a vector
> based CAD program

I suggest you use different toolkits for windowing (GUI widgets) and
drawing the vector graphics.

It does not really matter which toolkit you use for windowing.
wxPython looks good on many platforms and are free. So it PyGTK.

For vector graphics part I suggest PyCairo, AggDraw or OpenGL,
depending on your need.

PIL and NumPy are also essential if you will be working with images



From pavlovevidence at gmail.com  Wed Aug 29 19:26:05 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 29 Aug 2007 19:26:05 -0400
Subject: Haskell like (c:cs) syntax
References: <fb25uh$gl9$1@online.de>
	<4866bea60708281512q31635803x1b025274c94caf7e@mail.gmail.com>
	<mailman.86.1188340264.28954.python-list@python.org>
Message-ID: <46d60c96$0$16452$4c368faf@roadrunner.com>

On Tue, 28 Aug 2007 17:30:47 -0500, Erik Jones wrote:
> On Aug 28, 2007, at 5:12 PM, Chris Mellon wrote:
>> When working with lists, Python has a slice syntax (which is rather
>> more powerful than Haskells limited head->tail linked list syntax) that
>> you can use to chop a sequence up into various parts.
> 
> That is extremely arguable (in fact, Haskell's list semantics are
> extremely powerful as they are not limited to just head/tail).

Apples and oranges, really.  Pattern matching can do an awful lot of cool 
things, but arbitrary slicing isn't one of the more pleasant ones.  (At 
least not without a good set of slice-matching patterns handy, which I 
don't know if Haskell has.)


Carl Banks


From jzgoda at o2.usun.pl  Fri Aug 24 16:37:22 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Fri, 24 Aug 2007 22:37:22 +0200
Subject: GUI and distrubution
In-Reply-To: <fanec2$nr$1@daisy.noc.ucla.edu>
References: <1187974418.175783.50860@i38g2000prf.googlegroups.com>
	<92ab7$46cf1f51$4275d90a$11544@FUSE.NET>
	<fanec2$nr$1@daisy.noc.ucla.edu>
Message-ID: <fanfrn$lb3$1@nemesis.news.tpi.pl>

James Stroud napisa?(a):

>> These are two of the most-often-asked questions on this list (along
>> with "What's the best Python IDE?"). Search the list archives via
>> Google, or do a general Google search. Some helpful terms to get you
>> started include pyinstaller, py2exe, py2app, Tkinter, wxPython, PyQt,
>> and pyGTK.
> 
> One of these days, someone needs to write a tutorial on distributing for
>  the Big 3 (Linux, OSX, and Amiga--or was that last one supposed to be
> M$?).

That would make 12 howto's (4 GUI platforms x 3 operating systems). Tedious.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From ptmcg at austin.rr.com  Thu Aug 16 22:25:03 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Thu, 16 Aug 2007 19:25:03 -0700
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187311999.880853.135780@j4g2000prf.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<fa2m4s$k1g$1@daisy.noc.ucla.edu>
	<1187311999.880853.135780@j4g2000prf.googlegroups.com>
Message-ID: <1187317503.988255.194840@57g2000hsv.googlegroups.com>

On Aug 16, 7:53 pm, beginner <zyzhu2... at gmail.com> wrote:
> On Aug 16, 6:21 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
>
>
>
>
>
> > beginner wrote:
> > > Hi All.
>
> > > I'd like to do the following in more succint code:
>
> > > if k in b:
> > >     a=b[k]
> > > else:
> > >     a={}
> > >     b[k]=a
>
> > > a['A']=1
>
> > > In perl it is just one line: $a=$b->{"A"} ||={}.
>
> > I'm afraid you've asked a non sequiter:
>
> > euler 40% cat test.pl
>
> > $a=$b->{"A"} ||={} ;
> > print "$a\n" ;
>
> > $b->{"B"} = 0 ;
> > $a=$b->{"B"} ||={} ;
> > print "$a\n" ;
>
> > $b->{"X"} = 15 ;
> > $a=$b->{"X"} ||={} ;
> > print "$a\n" ;
>
> > euler 41% perl test.pl
> > HASH(0x92662a0)
> > HASH(0x926609c)
> > 15
>
> > James
>
> > --
> > James Stroud
> > UCLA-DOE Institute for Genomics and Proteomics
> > Box 951570
> > Los Angeles, CA 90095
>
> >http://www.jamesstroud.com/
>
> It is not supposed to be used this way.
> $b is supposed to be a hash-table of hash-table. If a key exists in
> $b, it points to another hash table. The $a=$b->{"A"} ||={} pattern is
> useful when you want to add records to the double hash table.
>
> For example, if you have a series of records in the format of (K1, K2,
> V), and you want to add them to the double hash-table, you can do
> $a=$b->{K1} || ={}
> $a->{K2}=V- Hide quoted text -
>
> - Show quoted text -

I think this demonstrates the Python version of what you describe.

-- Paul

from collections import defaultdict

data = [
    ('A','B',1), ('A','C',2), ('A','D',3), ('B','A',4),
    ('B','B',5), ('B','C',6), ('B','D',7),
    ]

def defaultdictFactory():
    return defaultdict(dict)

table = defaultdict(defaultdictFactory)

for k1,k2,v in data:
    table[k1][k2] = v

for kk in sorted(table.keys()):
    print "-",kk
    for jj in sorted(table[kk].keys()):
        print "  -",jj,table[kk][jj]

prints:

- A
  - B 1
  - C 2
  - D 3
- B
  - A 4
  - B 5
  - C 6
  - D 7



From byte8bits at gmail.com  Tue Aug 14 14:57:32 2007
From: byte8bits at gmail.com (brad)
Date: Tue, 14 Aug 2007 14:57:32 -0400
Subject: post xml payload with urllib
Message-ID: <f9su1q$4e6$1@solaris.cc.vt.edu>

Has anyone sent an xml payload via post using urllib? I'd like to do 
something like this:

logon_request = """<LoginRequest>
   <password>"the_password"</password>
   <user>"the_user"</user>
</LoginRequest>"""

logon = urllib.urlopen("https://127.0.0.1/api/version/xml", logon_request)
print logon.read()
logon.close()

127.0.0.1 expects xml via a https connection post.


From aahz at pythoncraft.com  Sat Aug  4 10:07:09 2007
From: aahz at pythoncraft.com (Aahz)
Date: 4 Aug 2007 07:07:09 -0700
Subject: the one python book
References: <mailman.1611.1186233912.22759.python-list@python.org>
Message-ID: <f9216d$ffu$1@panix3.panix.com>

In article <mailman.1611.1186233912.22759.python-list at python.org>,
dhr <dima.hristov at gmail.com> wrote:
>
>newbie question:
>
>Is there a 'K&R" type of Python book? The book that you'd better have on 
>your shelf if you are going into Python? 

There really aren't any, assuming you're comfortable reading web-based
material.  If it's important to you to have a reference book, probably
_Python in a Nutshell_ would be best.  If you're looking for a tutorial,
I'll plug my own _Python for Dummies_.  ;-)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

This is Python.  We don't care much about theory, except where it intersects 
with useful practice.  


From irmen.NOSPAM at xs4all.nl  Sun Aug 12 12:00:26 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 12 Aug 2007 18:00:26 +0200
Subject: ANN: Compyler 0.1
In-Reply-To: <mailman.1859.1186862018.22759.python-list@python.org>
References: <mailman.1859.1186862018.22759.python-list@python.org>
Message-ID: <46bf2ea3$0$240$e4fe514c@news.xs4all.nl>

Grant Olson wrote:
> Compyler is a pre-alpha x86 native code compiler. 

In what ways is this similar or different to Shed Skin?
http://mark.dufour.googlepages.com/

--Irmen


From victor.lebrun at gmail.com  Thu Aug  2 16:53:34 2007
From: victor.lebrun at gmail.com (vml)
Date: Thu, 02 Aug 2007 20:53:34 -0000
Subject: python 3.0, pywin32 and scipy
In-Reply-To: <1186086609.231563.224090@x35g2000prf.googlegroups.com>
References: <1186070475.659511.24130@q3g2000prf.googlegroups.com>
	<1186086609.231563.224090@x35g2000prf.googlegroups.com>
Message-ID: <1186088014.008755.318660@e9g2000prf.googlegroups.com>

On 2 ao?t, 22:30, sturlamolden <sturlamol... at yahoo.no> wrote:
> On Aug 2, 6:01 pm, vml <victor.leb... at gmail.com> wrote:
>
> > - my script using pywin32 for the COM layer and scipy for the maths
> > won't work under 3.0
>
> Why not?
>
> > - will we have the equivalent of pywin32 and scipy in python ?
>
> Say what? I've always thought pywin32 and scipy were Python packages.

The problem is quite complex in my case.

My company has a some softwares to do some test measurement which can
be automated with vb 6 via OLE automation.
One could use matlab and vb 6 or vb.net or even C# but I succeed to
show the advantages of python due to its simplicity and its
efficiency  but I am a newbee and not a computer scientist at all. Now
they want to use Python as the swissknife of the engineer.

So it is going from vb 6 to Python which is not really straight
forward ... If we want to do simple things like matlab script it is
possible in python, but it is also possible to do some OO programming
and even more.

So with python I need absolutly a COM level and also scipy and
matplotlib, I am confident that both will be ported to python 3.x.

I try still to convince people to switch for, vb 6 to python by
writting a python module which will handle the come layer of our
software.

I thank you very much for your answers.

I hope it will be possible to switch easily to python 3. But I need to
produce something as cheap as possible and I have no means ...

And I try to argue to give up vb 6 and use python. C# is for our
developpers the best solution to do this except the mathematic
stuff... python is so easy to use and easy to read I believe it can be
our best solution ...

Any ideas to convience people (except my scripts ;) )?




From davbrow at gmail.com  Fri Aug 24 01:41:08 2007
From: davbrow at gmail.com (Davo)
Date: Thu, 23 Aug 2007 22:41:08 -0700
Subject: List Comprehension Question: One to Many Mapping?
In-Reply-To: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
References: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
Message-ID: <1187934068.998593.201240@x40g2000prg.googlegroups.com>

On Aug 23, 9:24 pm, beginner <zyzhu2... at gmail.com> wrote:
> Hi All,
>
> How do I map a list to two lists with list comprehension?
>
> For example, if I have x=[ [1,2], [3,4] ]
>
> What I want is a new list of list that has four sub-lists:
>
> [[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]]
>
> [1,2] is mapped to [1,2] and [f(1), f(2)] and [3,4] is mapped to
> [3,4], [f(3), f(4)].
>
> I just can't find any way to do that with list comprension. I ended up
> using a loop (untested code based on real code):
>
> l=[]
> for y in x:
>    l.append(y)
>    l.append([f(z) for z in y])
>
> Thanks,
> Geoffrey

This may be what you want:

l = [[y, [f(z) for z in y]] for y in x]

But It's a bit dense.  How about:
l=[]
for y in x:
    Fy = [f(z) for z in y]
    l.extend([y, Fy])

-- David



From kyosohma at gmail.com  Mon Aug  6 15:15:34 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 06 Aug 2007 19:15:34 -0000
Subject: Any Good Book To Start ?
In-Reply-To: <1186426924.388898.224310@l70g2000hse.googlegroups.com>
References: <1186426924.388898.224310@l70g2000hse.googlegroups.com>
Message-ID: <1186427734.352753.183520@z24g2000prh.googlegroups.com>

On Aug 6, 2:02 pm, Katie Tam <katie... at gmail.com> wrote:
> Please let me know any good book to start ? Thank You
>
> Katie Tam
> CCNP, CCDP
> LinkWaves Corporation
> **Leading Provider of Cisco Equipment**http://www.linkwaves.com

To start learning Python or what?

"Python Programming 3rd Ed." by Lutz is good for learning deeper
concepts in Python, but is probably better suited for experienced
programmers. I still recommend it though, as it has lots of case
studies and cool examples.

"Python for Dummies" gives a good overview of Python for a complete
n00b. There are many other beginner Python books, most of which are
pretty nice, but not equal in quality.

Mike



From chernevik at gmail.com  Sat Aug  4 18:03:32 2007
From: chernevik at gmail.com (chernevik at gmail.com)
Date: Sat, 04 Aug 2007 22:03:32 -0000
Subject: Question -- Running Programming Python Examples
In-Reply-To: <mailman.1627.1186264086.22759.python-list@python.org>
References: <1186263007.587499.305340@57g2000hsv.googlegroups.com>
	<mailman.1627.1186264086.22759.python-list@python.org>
Message-ID: <1186265012.342976.139150@q75g2000hsh.googlegroups.com>

That fixed it, and Gary's item on pointing my browser to the proper
port answered the next question percolating in my mind.  It now runs
as advertised.

Thanks to you both!




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug  8 08:02:56 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 08 Aug 2007 14:02:56 +0200
Subject: Seek the one billionth line in a file containing 3 billion lines.
In-Reply-To: <1186571432.901348.138990@g4g2000hsf.googlegroups.com>
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
	<7xzm12o7o7.fsf@ruckus.brouhaha.com>
	<mailman.1729.1186557385.22759.python-list@python.org>
	<46b996b1$0$12384$426a74cc@news.free.fr>
	<1186571432.901348.138990@g4g2000hsf.googlegroups.com>
Message-ID: <46b9b0f0$0$15951$426a74cc@news.free.fr>

Ant a ?crit :
> On Aug 8, 11:10 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>> Jay Loden a ?crit :
>> (snip)
>>
>>> If we just want to iterate through the file one line at a time, why not just:
>>> count = 0
>>> handle = open('hugelogfile.txt')
>>> for line in handle.xreadlines():
>>>     count = count + 1
>>>     if count == '1000000000':
>>>         #do something
>> for count, line in enumerate(handle):
>>      if count == '1000000000':
>>          #do something
> 
> You'd get better results if the test were:
> 
> if count == 1000000000:
> 
> Or probably even:
> 
> if count == 999999999:
> 
> Since the 1 billionth line will have index 999999999.
> 

Doh :(

Thanks for the correction.


From aleax at mac.com  Wed Aug 29 10:44:57 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 29 Aug 2007 07:44:57 -0700
Subject: What's the difference ?
References: <1188394767.333396.129020@r29g2000hsg.googlegroups.com>
	<1188396199.136398.321900@r34g2000hsd.googlegroups.com>
Message-ID: <1i3ljx0.et1tyg1lxph4nN%aleax@mac.com>

<kyosohma at gmail.com> wrote:
   ...
> Weird. Hetland's book, "Beginning Python" states that it's a matter of
> taste.

If your taste is for more verbose AND slower notation without any
compensating advantage, sure.

> Martelli's "Python Cookbook 2nd Ed." says to use the get()
> method instead as you never know if a key is in the dict.  However, I
> can't seem to find any reference to has_key in his book.

.get is not a direct alternative to ``in'' (it's an alternative to an
idiom where you key into the dict if the key is present and otherwise
supply a default value, and it's MUCH better in that case).  has_key is
probably not even mentioned in the Cookbook (2nd edition) since there is
never a good need for it in the Python versions it covers (2.2 and up),
but you can probably find traces in the 1st edition (which also covered
Python back to 1.5.2, where has_key *was* needed); the Nutshell (2nd ed)
mentions it briefly in a table on p. 60.


> According to Chun in "Core Python Programming", has_key will be
> obsoleted in future versions of Python, so he recommends using "in" or
> "not in".

Yes, we're removing has_key in Python 3.0 (whose first alpha will be out
reasonably soon, but is not going to be ready for production use for
quite a bit longer), among other redundant things that exist in 2.* only
for legacy and backwards compatibility reasons.  This makes 3.0 simpler
(a little closer to the "only one obvious way" ideal).

But you should use ``in'' and ``not in'' anyway, even if you don't care
about 3.* at all, because they only have advantages wrt has_key, without
any compensating disadvantage.


Alex


From rdm at rcblue.com  Wed Aug 22 03:15:26 2007
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 22 Aug 2007 00:15:26 -0700
Subject: 'REPL' style IDE
In-Reply-To: <1187632249.748945.158910@i13g2000prf.googlegroups.com>
References: <1187632249.748945.158910@i13g2000prf.googlegroups.com>
Message-ID: <20070822071536.8D8ED1E4014@bag.python.org>

At 10:50 AM 8/20/2007, beginner wrote:
>Hi Everyone,
>
>I am using the Wing IDE. It works great when developing applications,
>but the workflow is like Visual Studio -- after you execute it or
>debug it, the python script ends.
>
>What I want is an interactive interpreting environment. I want the IDE
>to execute a boot script to initialize my environment and create some
>basic data objects. And then I want to be able to type in command on
>the command line using these objects. The IDLE that comes with Python
>does this, but compared with Wing, it does not have a lot of the
>convenient features.
>
>I am wondering if there is anything more powerful than IDLE that can
>do this.

Are you sure you can't do this with Wing? Have you asked support, 
<support at wingware.com>?

Dick Moores



======================================
                       Bagdad Weather
<http://weather.yahoo.com/forecast/IZXX0008_f.html> 



From joel.granados at gmail.com  Tue Aug 21 16:33:07 2007
From: joel.granados at gmail.com (Joel Granados)
Date: Tue, 21 Aug 2007 15:33:07 -0500
Subject: IDE for Python
In-Reply-To: <1187709711.175483.86780@x35g2000prf.googlegroups.com>
References: <mailman.55.1187690455.32294.python-list@python.org>
	<1187709711.175483.86780@x35g2000prf.googlegroups.com>
Message-ID: <7ad76b520708211333h3247eba6m9166cf2566801281@mail.gmail.com>

Thanks to all for the valuable suggestions.


On 8/21/07, Benjamin <musiccomposition at gmail.com> wrote:
>
> On Aug 21, 5:00 am, Joel Andres Granados <joel.grana... at gmail.com>
> wrote:
> > Hello list:
> >
> > I have tried various times to use an IDE for python put have always been
> > disapointed.
> > I haven't revisited the idea in about a year and was wondering what the
> > python people
> > use.
> > I have also foundhttp://pida.co.uk/mainas a possible solution.  Anyone
> > tried it yet?
> >
> > suggestions.
> I like PyDev + Eclipse mostly because I develop Java, PHP, and C/C++,
> so I like having a consistent interface between the languages.
> Besides, the Eclipse updater makes updating and installing new
> features really easy.
> > Regards
> > Joel Andres Granados
> >
> >  joel.granados.vcf
> > 1KDownload
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Joel Andr?s Granados
Medell?n Colombia
--
jgranad1 at eafit.edu.co
joel.granados at ieee.org
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From steve at holdenweb.com  Sat Aug 11 10:04:04 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 11 Aug 2007 10:04:04 -0400
Subject: Finding gurus (was Re: Something in the function tutorial confused
	me.)
In-Reply-To: <f9kd93$lg8$1@panix3.panix.com>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>	<mailman.1737.1186577596.22759.python-list@python.org>	<5hv705F3mk67nU1@mid.individual.net>	<1i2nhnv.2y00l5173lfbbN%aleax@mac.com>
	<f9kd93$lg8$1@panix3.panix.com>
Message-ID: <f9kfkk$scq$1@sea.gmane.org>

Aahz wrote:
> In article <1i2nhnv.2y00l5173lfbbN%aleax at mac.com>,
> Alex Martelli <aleax at mac.com> wrote:
>> Because of this, a Google search for
>>
>>  "<name> <surname>" python
>>
>> may sometimes help; when you get 116,000 hits, as for "Steve Holden"
>> python, that may be a reasonable indication that the poster is one of
>> the world's Python Gurus (in fact, the winner of the 2007 Frank WIllison
>> Award -- congratulations, Steve!!!).
> 
> Sometimes that precise search pattern isn't appropriate, of course.  ;-)

Of course, Alex didn't mention that there are actually 117,000 hits, and 
the last thousand have nothing to do with programming ;-)

Alex, thanks for your congratulations, as no public announcement has yet 
been made (apart from at OSCON) I haven't mentioned the Frank Willison 
Award until now. The certificate arrived this week, and I am humbled by 
the honor.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From jeremy+complangpython at jeremysanders.net  Fri Aug 24 12:01:00 2007
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Fri, 24 Aug 2007 17:01:00 +0100
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
Message-ID: <famvbs$2fm$1@gemini.csx.cam.ac.uk>

Torsten Bronger wrote:

> Some LaTeX users in Aachen thought about a general-use markup
> language this spring.  I wrote some code and a rough project
> description, however, we could need some help.
> 
> If you are interested, visit the provisional project page at
> http://latex-bronger.sourceforge.net/gummi/

Sounds a good idea - LaTeX has so many historical hangovers. How many people
on earth can actually write a LaTeX style file?

I'm not sure about writing LaTeX output, however, due to the crude nasty
ways it handles fonts and so on. How are you going to get enough controls
for users over what they always complain about: fonts, page breaking, and
positioning of figures? Maybe it's an okay first step however.

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From Dominic at PLEASEASK.co.uk  Thu Aug  9 04:22:04 2007
From: Dominic at PLEASEASK.co.uk (special_dragonfly)
Date: Thu, 9 Aug 2007 09:22:04 +0100
Subject: Help with Dictionaries and Classes requested please.
Message-ID: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>

Hello,
I'm new to this group, I've read through the subject of a lot of the group
but can't find anything relevant. Perhaps my question is too basic but I'm
still stuck.
Classes and Dictionaries.
If I have a dictionary, how do I instantiate many instances of a class per
dictionary key? Either at run-time or dynamically.
Can anyone help me please?
Thank you
Dominic




From danb_83 at yahoo.com  Sat Aug 25 09:48:33 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: Sat, 25 Aug 2007 06:48:33 -0700
Subject: Does shuffle() produce uniform result ?
In-Reply-To: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
Message-ID: <1188049713.024407.265900@e9g2000prf.googlegroups.com>

On Aug 24, 2:38 am, tooru honda <tooru_ho... at fast-mail.org> wrote:
> Hi,
>
> I have read the source code of the built-in random module, random.py.
> After also reading Wiki article on Knuth Shuffle algorithm, I wonder if
> the shuffle method implemented in random.py produces results with modulo
> bias.
>
> The reasoning is as follows: Because the method random() only produces
> finitely many possible results, we get modulo bias when the number of
> possible results is not divisible by the size of the shuffled list.
>
> 1. Does shuffle() produce uniform result ?

Experimental evidence with a 5-card decks and 1,200,000 simulation
gives me

[9782, 9784, 9784, 9786, 9817, 9822, 9825, 9841, 9859, 9864, 9866,
9872, 9886, 9888, 9893, 9893, 9893, 9893, 9896, 9896, 9901, 9905,
9909, 9909, 9912, 9917, 9919, 9920, 9920, 9925, 9932, 9933, 9934,
9938, 9938, 9943, 9944, 9946, 9947, 9951, 9952, 9955, 9956, 9959,
9960, 9961, 9962, 9963, 9964, 9966, 9968, 9968, 9968, 9969, 9969,
9975, 9977, 9978, 9978, 9979, 9985, 9987, 9990, 9996, 9998, 9998,
10002, 10009, 10012, 10015, 10017, 10018, 10020, 10026, 10027, 10028,
10032, 10035, 10042, 10047, 10048, 10049, 10049, 10055, 10056, 10060,
10062, 10064, 10066, 10069, 10070, 10076, 10087, 10089, 10092, 10095,
10097, 10098, 10100, 10101, 10116, 10117, 10128, 10129, 10131, 10137,
10138, 10140, 10146, 10155, 10158, 10162, 10162, 10163, 10177, 10190,
10190, 10232, 10260, 10292]

frequencies of each of the 120 possible orderings.  The chi-squared
test statistic (for H0: all 120 orderings are equally likely) is
132.9472 with 119 degrees of freedom.  The p-value is 0.1804, which is
greater than typically-used significance levels, so there is
insufficient evidence to reject H0.



From zzbbaadd at aol.com  Fri Aug 31 00:33:43 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 30 Aug 2007 21:33:43 -0700
Subject: list index()
In-Reply-To: <mailman.183.1188533232.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<87bqcod2gq.fsf@benfinney.id.au>
	<1188517370.998114.119940@q4g2000prc.googlegroups.com>
	<mailman.179.1188521931.28954.python-list@python.org>
	<1188530220.815429.281380@i38g2000prf.googlegroups.com>
	<mailman.183.1188533232.28954.python-list@python.org>
Message-ID: <1188534823.558722.212480@l22g2000prc.googlegroups.com>

On Aug 30, 9:06 pm, "Carsten Haese" <cars... at uniqsys.com> wrote:
> On Thu, 30 Aug 2007 20:17:00 -0700, zzbbaadd wrote
>
> > Well IN was what I was looking for and would have saved this thread.
> > However I don't believe IN showed up on the doc web page that has
> > list methods, where I found index().
>
> They're not on the exact same page, but index() is in section 3.6.4 of the
> library reference (http://docs.python.org/lib/typesseq-mutable.html), whereas
> "in" is in section 3.6 of the library reference
> (http://docs.python.org/lib/typesseq.html). I'm wondering how you managed to
> find subsection 3.6.4 without finding section 3.6.

www.google.com

search "python list methods"

first search find:

5. Data Structures
The list methods make it very easy to use a list as a stack, where the
last element added .... Another useful data type built into Python is
the dictionary. ...
http://docs.python.org/tut/node7.html

"The list data type has some more methods. Here are all of the methods
of list objects:"





From seb.buchoux at gmail.com  Sun Aug 19 05:47:03 2007
From: seb.buchoux at gmail.com (=?ISO-8859-1?Q?S=E9bastien?=)
Date: Sun, 19 Aug 2007 11:47:03 +0200
Subject: Hot subject: a good python editor and/or IDE?
Message-ID: <46C81197.6030700@gmail.com>

Hi folks,

I am currently using Eclipse+PyDev when developping Python projects but 
I lack a fast, simple editor for tiny bit of scripts. So here is my 
question: what is, for you, the current best ( but still kind of light! 
) Python editor/IDE ? A tiny precision, I am on Ubuntu so I am looking 
for a linux compatible editor.

Cheers,

S?bastien


From junkeun.park at gmail.com  Mon Aug 27 17:43:00 2007
From: junkeun.park at gmail.com (Jun-geun Park)
Date: Mon, 27 Aug 2007 17:43:00 -0400
Subject: Biased random?
In-Reply-To: <favd0c$fcu$1@ss408.t-com.hr>
References: <favd0c$fcu$1@ss408.t-com.hr>
Message-ID: <favgh4$1gm3$1@grapevine.csail.mit.edu>

Ivan Voras wrote:
> Hi,
> 
> I have a list of items, and need to choose several elements from it,
> "almost random". The catch is that the elements from the beginning
> should have more chance of being selected than those at the end (how
> much more? I don't care how the "envelope" of probability looks like at
> this point - can be linear). I see that there are several functions in
> Python standard libraries for various distribution, but is there an easy
> pythonic way to make them do what I need?
> 
> 

That's weird. random.randint(a,b) will be enough for most cases. Test
your system to see the distribution is uniform with something like:

----
import random

dist = {}
for z in xrange(100000):
     u = random.randint(1,10)
     try:
         dist[u] = dist[u] + 1
     except KeyError:
         dist[u] = 1

print dist
----


From lew at lewscanon.com  Mon Aug 20 08:05:36 2007
From: lew at lewscanon.com (Lew)
Date: Mon, 20 Aug 2007 08:05:36 -0400
Subject: Latest models of Gibson guitars
In-Reply-To: <1187579396.285862.186860@e9g2000prf.googlegroups.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<1187548916.909340.37420@k79g2000hse.googlegroups.com>
	<1187579396.285862.186860@e9g2000prf.googlegroups.com>
Message-ID: <9K6dnY8HnIUNHlTbnZ2dnUVZ_gGdnZ2d@comcast.com>

Twisted wrote:
> On Aug 19, 2:41 pm, vedrandeko... at v-programs.com wrote:
>> This is  a newsgroup of programming language Python, stop with this!
> 
> Python?! Python is as off-topic here as guitars, unlike, say, Java...

When referring to "this" newsgroup or "here", one must remember that this is a 
cross-posted thread, so those concepts have multiple referents.

Take another look at the address field ("Newsgroups:") of the message, then 
redefine "this newsgroup" accordingly - there are more than one due to the 
spammish cross-posting of the original message.

So let's all stop being so parochial, hmm?

-- 
Lew


From bj_666 at gmx.net  Thu Aug 30 03:27:12 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 Aug 2007 07:27:12 GMT
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au>
Message-ID: <5jn9qgFdmbcU3@mid.uni-berlin.de>

On Thu, 30 Aug 2007 17:09:36 +1000, Ben Finney wrote:

> zzbbaadd at aol.com writes:
> 
>> What's with the index() function of lists throwing an exception on not
>> found?
> 
> It's letting you know that the item isn't in the list. There's no
> sensible return value from an "index" function in that condition.

What about -1?  C programmers do this all the time.  :-)

Ciao,
	Marc 'BlackJack' Rintsch


From simon at brunningonline.net  Mon Aug 27 12:34:51 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Mon, 27 Aug 2007 17:34:51 +0100
Subject: Image.open( "C:\test.jpg") is this wrong ?
In-Reply-To: <CEFAE560FE3E3C458A2335A1AA37A82D06763937@MAIL2W2K3.WarrenNT.SaintFrancis.Loc>
References: <CEFAE560FE3E3C458A2335A1AA37A82D06763937@MAIL2W2K3.WarrenNT.SaintFrancis.Loc>
Message-ID: <8c7f10c60708270934h69cad046ic7b4ac68119da069@mail.gmail.com>

On 8/27/07, Carnell, James E <jecarnell at saintfrancis.com> wrote:

> Image.open("C:\test.jpg")

Try:

Image.open(r"C:\test.jpg")

See http://docs.python.org/ref/strings.html

-- 
Cheers,
Simon B.
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/
GTalk: simon.brunning | MSN: small_values | Yahoo: smallvalues


From steve at holdenweb.com  Sun Aug 26 22:16:11 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 26 Aug 2007 22:16:11 -0400
Subject: make images with python
In-Reply-To: <fap87e$ue4$1@lust.ihug.co.nz>
References: <1187147338.400947.181010@x40g2000prg.googlegroups.com>	<1i2vg8p.1d8t42r1jzvm9iN%raims@dot.com>	<mailman.2012.1187186603.22759.python-list@python.org>
	<fap87e$ue4$1@lust.ihug.co.nz>
Message-ID: <fatc5b$5i0$1@sea.gmane.org>

Lawrence D'Oliveiro wrote:
> In message <mailman.2012.1187186603.22759.python-list at python.org>, Boris
> Borcic wrote:
> 
>> Lawrence Oluyede wrote:
>>
>>> stefano <ssalvatori at gmail.com> wrote:
>>>> I need make some images using python but i'm lost :P
>>> <http://www.pythonware.com/products/pil/>
>>>
>> If you want to do antialiased drawings into images,
>> you might rather want to look for pil at
>>
>> http://effbot.org/downloads/
>>
>> and grab PIL together with the aggdraw extension
>> (while "core" PIL includes some drawing primitives,
>> last time I tried they weren't antialiased).
> 
> I see that PIL supports image resizing
> <http://www.pythonware.com/library/pil/handbook/image.htm> with filters
> that can be used for antialiasing. So just do all your drawing at, say,
> 200% scale, then downsample with Image.resize to antialias.

That certainly worked very well for rendering text.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From robert.kern at gmail.com  Fri Aug 31 14:40:59 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 31 Aug 2007 13:40:59 -0500
Subject: Biased random?
In-Reply-To: <fb9bg9$ibi$1@sea.gmane.org>
References: <favd0c$fcu$1@ss408.t-com.hr>	<mailman.80.1188332647.28954.python-list@python.org>	<fb77bq$jtk$1@ss408.t-com.hr>
	<fb7a3d$phj$1@sea.gmane.org> <fb9bg9$ibi$1@sea.gmane.org>
Message-ID: <fb9nc1$s6v$1@sea.gmane.org>

Jeffrey Barish wrote:
> Robert Kern wrote:
> 
>> Ivan Voras wrote:
>>> Jeffrey Barish wrote:
>>>
>>>> If you take the difference between two uniformly distributed random
>>>> variables, the probability density function forms an isosceles triangle
>>>> centered at 0.  Take the absolute value of that variable and the pdf is
>>>> a
>>>> straight line with maximum value at 0 tapering to 0 at max.  Thus,
>>>>
>>>> z = abs(randint(0, max) - randint(0, max))
>>>>
>>>> ought to do the trick.
>>> It's elegant :)
>>>
>>> I've noticed something interesting in my test: the value 0 appears less
>>> often than other values (which behave as they should).
>> The distribution of the difference (before the abs()) looks like this
>> (max=4):
>>
>>     #
>>    ###
>>   #####
>>  #######
>>  ---0+++
>>  321 123
>>
>> Taking the absolute value doubles up the non-zero masses, but there's no
>> "negative 0" to add to the 0s stack.
>>
>>   #
>>   #
>>  ###
>>  ###
>>  ####
>>  ####
>>  0123
>>
>> The method does not work because of that.
>>
> The math says that it works, so we must not be implementing it correctly. 

"The math" says nothing of the kind about the method that was stated.

> I
> suspect that our mistake is quantizing the random variable first and then
> taking the difference and absolute value.  What result do you get when you
> quantize once?  That is, obtain two random values (floats) with uniform
> pdf.  Take the difference.  Abs. Round to int.  This way, everything in the
> band from (-0.5, +0.5) goes to 0, and that's the highest part of the
> triangle.

That's a very different "it". The difference is not just implementation.

If you change "round" to "truncate", that method should work, though.

-- 
Robert Kern

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



From ptmcg at austin.rr.com  Wed Aug 15 22:09:01 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 15 Aug 2007 19:09:01 -0700
Subject: replacement for string.printable
In-Reply-To: <mailman.2026.1187204186.22759.python-list@python.org>
References: <mailman.2026.1187204186.22759.python-list@python.org>
Message-ID: <1187230141.510879.229490@b79g2000hse.googlegroups.com>

On Aug 15, 1:56 pm, John K Masters <johnmast... at oxtedonline.net>
wrote:
> >From what I have read the string module is obsolete and should not be
>
> used but I am working on a project that parses printable files created
> in a DOS program and creates a web page for each file. I am using the
> string.printable constant to determine which characters should be kept;
> the files contain many print control codes. There seems to be nothing
> like this in the string methods. isalnum() seems the nearest but gives
> false for '+' '!' etc.
>
> I realise I could define a global string to cover this but wondered if
> there was another, better, way
>
> Regards, John
> --
> War is God's way of teaching Americans geography
> Ambrose Bierce (1842 - 1914)

Well, I was all set with a cocky answer to the effect of "here's half
a dozen different ways to test to see if the ordinal of a character is
between 33 and 127 inclusive," assuming that the "printable" in
string.printable meant "prints something that is not whitespace."
Well, I'm glad I checked - string.printable includes a number of
whitespace characters, including those with ASCII codes 32 (space), 9
(tab), 10 (linefeed), 13 (CR), 11 (FF), and 12 (VT).  So you could
hard code such a string (you are working with a legacy DOS app after
all), or maybe better, make it a set of chars, since it seems that you
are doing massive numbers of membership tests using "if c in string:"
- create the set once, and then use "if c in setMadeFromString:".

-- Paul






From steve at holdenweb.com  Thu Aug  9 12:24:09 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Aug 2007 12:24:09 -0400
Subject: Stackless Integration
In-Reply-To: <f9fd8h$q2t$1@sea.gmane.org>
References: <mailman.1786.1186660119.22759.python-list@python.org>	<46bb1df0$0$403$426a74cc@news.free.fr>
	<f9fd8h$q2t$1@sea.gmane.org>
Message-ID: <f9ff36$f1$1@sea.gmane.org>

Steve Holden wrote:
> Bruno Desthuilliers wrote:
>> Jean-Paul Calderone a ?crit :
>>> On Thu, 09 Aug 2007 09:00:27 -0000, "Justin T." <jmtulloss at gmail.com> 
>>> wrote:
>>>> Hi,
>>>>
>>>> I've been looking at stackless python a little bit, and it's awesome.
>>>> My question is, why hasn't it been integrated into the upstream python
>>>> tree? Does it cause problems with the current C-extensions? It seems
>>>> like if something is fully compatible and better, then it would be
>>>> adopted. However, it hasn't been in what appears to be 7 years of
>>>> existence, so I assume there's a reason.
>>> It's not Pythonic.
>> Hum... Yes ? Really ? Care to argument ?
> 
> Unfortunately such arguments quickly descend to the "yes it is", "no it 
> isn't" level, as there is no objective measure of Pythonicity.
> 
> Twisted [...]
> 
Oops, did I say Twisted? When I last heard Chris Tismer talking about 
Stackless someone in the audience asked him about the prospects of 
incorporating Stackless into the core and he suggested he didn't 
necessarily think of that as a desirable change.

I would like to see it in the core, but integration would not be an easy 
task, and maintenance might be problematic.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From __peter__ at web.de  Fri Aug 17 10:51:48 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 17 Aug 2007 16:51:48 +0200
Subject: how to pass a custom object to re.search?
References: <1187359347.755104.118660@r29g2000hsg.googlegroups.com>
	<1i2zz9z.jb9h6m13ontqgN%raims@dot.com>
	<1187360512.063710.182450@r29g2000hsg.googlegroups.com>
Message-ID: <fa4cm6$uab$00$1@news.t-online.com>

 brunovianarezende at gmail.com wrote:

> I've done that (and added __unicode__ too). I only didn't want to, I
> want to do:
> 
> re.search(custom_object)
> 
> so, code that worked before as:
> 
> re.search(parentobj.custom_object)
> 
> don't have to be changed for:
> 
> re.search(str(parentobj.custom_object))
> 
> and I'm also curious to know if it is possible to do that... :-)

Not without monkeypatching the re module:

import re

_original_compile = re._compile

def _wrapped_compile(*key):
    try:
        custom_compile = key[0].__compile__
    except AttributeError:
        return _original_compile(*key)
    else:
        return custom_compile(*key[1:])

re._compile = _wrapped_compile


class Aaa(object):
    def __compile__(self, *args):
        return re.compile("[Aa]+")

print re.findall(Aaa(), "a yadda so whaaaat")

Peter


From jmtulloss at gmail.com  Thu Aug  9 12:53:39 2007
From: jmtulloss at gmail.com (Justin T.)
Date: Thu, 09 Aug 2007 16:53:39 -0000
Subject: Stackless Integration
In-Reply-To: <mailman.1786.1186660119.22759.python-list@python.org>
References: <1186650027.043779.276520@i38g2000prf.googlegroups.com>
	<mailman.1786.1186660119.22759.python-list@python.org>
Message-ID: <1186678419.594781.149190@g12g2000prg.googlegroups.com>


> It's not Pythonic.
>
> Jean-Paul

Ha! I wish there was a way to indicate sarcasm on the net. You almost
got people all riled up!



From fartknuckle at fartknuckle.com  Fri Aug 10 17:01:57 2007
From: fartknuckle at fartknuckle.com (fartknuckle)
Date: Fri, 10 Aug 2007 16:01:57 -0500
Subject: Python Dies on "make install"
Message-ID: <pan.2007.08.10.21.01.56.706157@fartknuckle.com>


When I try to build and install python from source It configures and 
makes fine but upon 'make install' I always get to this
point:



Listing /usr/local/lib/python2.5/xml/sax ...
Compiling /usr/local/lib/python2.5/xml/sax/__init__.py ...
Compiling /usr/local/lib/python2.5/xml/sax/_exceptions.py ...
Compiling /usr/local/lib/python2.5/xml/sax/expatreader.py ...
Compiling /usr/local/lib/python2.5/xml/sax/handler.py ...
Compiling /usr/local/lib/python2.5/xml/sax/saxutils.py ...
Compiling /usr/local/lib/python2.5/xml/sax/xmlreader.py ...
Compiling /usr/local/lib/python2.5/xmllib.py ...
Compiling /usr/local/lib/python2.5/xmlrpclib.py ...
Compiling /usr/local/lib/python2.5/zipfile.py ...
make: *** [libinstall] Error 1                     



I am currently trying to install 2.5.1. I get the error no matter what the
version is. Does anyone have an idea what may be causing this?

I have gone through the config.log and found no errors concerning
zipfile.py or zipfile or zip. I am thinking the error is the next command
after the zipfile.py installation because I can go into 
/usr/local/lib/python2.5 and zipfile.py is installed.

Any help much appreciated.

Thanks



-- 
Take summa dis punk!


From joncle at googlemail.com  Wed Aug 15 09:46:58 2007
From: joncle at googlemail.com (Jon Clements)
Date: Wed, 15 Aug 2007 06:46:58 -0700
Subject: What order does info get returned in by os.listdir()
In-Reply-To: <gemini.jmthof006bdd602a4@omba.demon.invalid>
References: <gemini.jms7ay00fafcf00k8@jernic.by.invalid>
	<gemini.jmtc5f0021tj002a4@omba.demon.invalid>
	<5igd1gF3mc1akU1@mid.uni-berlin.de>
	<gemini.jmthof006bdd602a4@omba.demon.invalid>
Message-ID: <1187185618.672790.305850@w3g2000hsg.googlegroups.com>

To emulate the order of XP, you might be able to get away with
something like:-

    sorted( myData, key=lambda L: L.replace('~',chr(0)) )

That just forces all '~'s to be before everything else.

hth,

Jon.

On 15 Aug, 14:33, Jeremy C B Nicoll <jer... at omba.demon.co.uk> wrote:
> Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>
>
>
>
>
> > On Wed, 15 Aug 2007 12:34:27 +0100, Jeremy C B Nicoll wrote:
>
> > > I've some supplementary questions... my original code was looking at
> > > each leafname in turn via
>
> > >   for leaf in os.listdir(path):
> > >       wholefile = os.path.join(path,leaf)
> > >       if os.path.isfile(wholefile):
> > >          if leaf.startswith("~"):
>
> > > etc.  But I now realise I might alternatively do something like:
>
> > >   leaflist = os.listdir(path)
> > >   <then something to sort that list>
> > >   for leaf in leaflist:
>
> > But this is doing something different that the above code!?
>
> I'm not sure if I understand you.  I know it's only "equivalent" to the
> first line of what's above, ie iterate over a list of names, and obviously
> it's got the sorting of that list done, but do you mean there's some other
> difference?
>
> > > How would I sort leaflist in a way that mimics the sort order that XP
> > > shows me things under?
>
> > This depends on what XP is.  Which program?  Which locale?  How does the
> > locale influence that programs sorting?
>
> Well... XP is Windows XP (Pro as I think I said earlier), and I'm in the UK.
> I explained earlier how XP shows me stuff in order when I tell it to sort by
> name.  
>
>
>
>
>
>
>
> > > Secondly, my code is wasting time looking at subdirectories/files which
> > > I already know I'm not interested in.  Is there a way to restrict
> > > listdir to, say, only return info about subdirectories, or only about
> > > dirs/files whose names match a pattern?
>
> > `os.listdir()` always returns all names.  You can or have to  filter the
> > result if you are only interested in some of the names.  Simple pattern
> > matching on names can be done with `glob.glob()`.
>
> > > Thirdly, once I've go a list of leafnames, somehow, is there a way to
> > > ask Python if a specific leaf-value is in that list, without explicitly
> > > looping through the items in the list?
>
> > With the ``in`` operator you have an implicit loop over the list.
>
> >   if 'readme.txt' in leafnames:
> >       print 'Hurray!'
>
> OK, that looks useful.  Thanks.
>
> --
> Jeremy C B Nicoll - my opinions are my own.- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -




From alisonken1 at gmail.com  Thu Aug 16 12:45:57 2007
From: alisonken1 at gmail.com (alisonken1)
Date: Thu, 16 Aug 2007 16:45:57 -0000
Subject: Layer 2 socket connection
In-Reply-To: <1187265821.989249.276090@r34g2000hsd.googlegroups.com>
References: <1187202110.958564.206770@l22g2000prc.googlegroups.com>
	<1187265821.989249.276090@r34g2000hsd.googlegroups.com>
Message-ID: <1187282757.460386.143180@l22g2000prc.googlegroups.com>

On Aug 16, 5:03 am, "richmoor... at gmail.com" <richmoor... at gmail.com>
wrote:
<snip>
> I use impacket for stuff like that, seehttp://oss.coresecurity.com/projects/impacket.html
>
> Cheers
>
> Rich.

Thanks, Rich - I'll have a look



From kbk at shore.net  Fri Aug 10 22:08:34 2007
From: kbk at shore.net (Kurt B. Kaiser)
Date: Fri, 10 Aug 2007 22:08:34 -0400 (EDT)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200708110208.l7B28YEW028649@hampton.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  404 open ( +0) /  3855 closed ( +8) /  4259 total ( +8)
Bugs    : 1065 open ( +6) /  6790 closed ( +6) /  7855 total (+12)
RFE     :  263 open ( +0) /   295 closed ( +0) /   558 total ( +0)

New / Reopened Patches
______________________

MSVC++8 x86 tkinter build patch for trunk  (2007-08-05)
       http://python.org/sf/1767787  opened by  brotchie

test_asyncore fix  (2007-08-05)
CLOSED http://python.org/sf/1767834  opened by  Hasan Diwan

Fix for failing test_scriptpackages in py3k-struni  (2007-08-07)
CLOSED http://python.org/sf/1768976  opened by  Antti Rasinen

Fix for failing test_plistlib in py3k-struni  (2007-08-07)
CLOSED http://python.org/sf/1769016  opened by  brotchie

struni: test_xml_etree_c  (2007-08-08)
CLOSED http://python.org/sf/1769767  opened by  Joe Gregorio

Remove cStringIO usage  (2007-08-08)
CLOSED http://python.org/sf/1770008  reopened by  tiran

Remove cStringIO usage  (2007-08-08)
CLOSED http://python.org/sf/1770008  opened by  Christian Heimes

ctypes: c_char now uses bytes and not str (unicode)  (2007-08-08)
CLOSED http://python.org/sf/1770355  opened by  STINNER Victor

Misc improvements for the io module  (2007-08-10)
       http://python.org/sf/1771364  opened by  Christian Heimes

Patches Closed
______________

test_asyncore fix  (2007-08-05)
       http://python.org/sf/1767834  closed by  gvanrossum

test_csv struni fixes + unicode support in _csv  (2007-08-03)
       http://python.org/sf/1767398  closed by  gvanrossum

urllib2-howto - correction  (2007-08-02)
       http://python.org/sf/1765839  closed by  gbrandl

Fix for failing test_scriptpackages in py3k-struni  (2007-08-06)
       http://python.org/sf/1768976  closed by  nnorwitz

Fix for failing test_plistlib in py3k-struni  (2007-08-07)
       http://python.org/sf/1769016  closed by  gvanrossum

struni: test_xml_etree_c  (2007-08-07)
       http://python.org/sf/1769767  closed by  nnorwitz

Remove cStringIO usage  (2007-08-08)
       http://python.org/sf/1770008  closed by  gvanrossum

Remove cStringIO usage  (2007-08-08)
       http://python.org/sf/1770008  closed by  gvanrossum

ctypes: c_char now uses bytes and not str (unicode)  (2007-08-08)
       http://python.org/sf/1770355  closed by  haypo

New / Reopened Bugs
___________________

SocketServer.DatagramRequestHandler  (2007-08-04)
       http://python.org/sf/1767511  opened by  Alzheimer

Badly formed XML using etree and utf-16  (2007-08-05)
       http://python.org/sf/1767933  opened by  BugoK

Byte code WITH_CLEANUP missing, MAKE_CLOSURE wrong  (2007-08-05)
       http://python.org/sf/1768121  opened by  L. Peter Deutsch

tutorial  (2007-08-06)
CLOSED http://python.org/sf/1768767  opened by  Michael R Bax

Python - Operation time out problem   (2007-08-06)
       http://python.org/sf/1768858  opened by  MASK

A paragraph about packages should be updated.  (2007-08-07)
CLOSED http://python.org/sf/1769002  opened by  Noam Raphael

decimal.Decimal("trash") produces informationless exception  (2007-08-08)
       http://python.org/sf/1770009  opened by  John Machin

platform.mac_ver() returning incorrect patch version  (2007-08-08)
       http://python.org/sf/1770190  opened by  Gus Tabares

Decimal.__int__ overflows for large values  (2007-08-08)
       http://python.org/sf/1770416  opened by  Jason G

words able to decode but unable to encode in GB18030  (2007-08-09)
       http://python.org/sf/1770551  opened by  Z-flagship

Errors in site.py not reported properly  (2007-08-09)
       http://python.org/sf/1771260  opened by  Adam Olsen

bsddb can't use unicode keys  (2007-08-10)
       http://python.org/sf/1771381  opened by  Erol Aktay

another 'nothing to repeat'  (2007-08-10)
CLOSED http://python.org/sf/1771483  opened by  viciousdog

minor bug in turtle  (2007-08-10)
CLOSED http://python.org/sf/1771558  opened by  Jeremy Sanders

Bugs Closed
___________

String.capwords() does not capitalize first word  (2007-08-03)
       http://python.org/sf/1767363  closed by  gbrandl

subprocess.Popen.wait fails sporadically with threads  (2007-07-16)
       http://python.org/sf/1754642  closed by  gbrandl

subprocess raising "No Child Process" OSError  (2007-07-14)
       http://python.org/sf/1753891  closed by  gbrandl

tutorial  (2007-08-06)
       http://python.org/sf/1768767  deleted by  mrbax

A paragraph about packages should be updated.  (2007-08-07)
       http://python.org/sf/1769002  closed by  gbrandl

cStringIO no longer accepts array.array objects  (2007-06-03)
       http://python.org/sf/1730114  closed by  gbrandl

another 'nothing to repeat'  (2007-08-10)
       http://python.org/sf/1771483  deleted by  viciousdog

minor bug in turtle  (2007-08-10)
       http://python.org/sf/1771558  closed by  gbrandl



From Brian.McCann at viziant.net  Mon Aug 20 14:52:16 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Mon, 20 Aug 2007 14:52:16 -0400
Subject: reading a line in file
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>
	<2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com>
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx>

Hi,
 
I can read in the whole file build.number which has the following lines
how do I just capture the value of build.number and assign it to a variable
Thanks,
Brian

contents of file build.number:
#Build Number for ANT. Do not edit!
#Mon Aug 20 04:04:51 EDT 2007
build.number=1

buildinfo.py
##################################
#!/usr/bin/python
import string
import os
import sys
import time
import errno
import shutil
buildinfo = "build.number"
input = open(buildinfo, 'r')
for line in input:
        print line
#########################################
 
command line when script is run
$ buildinfo.py
#Build Number for ANT. Do not edit!
#Mon Aug 20 04:04:51 EDT 2007
build.number=1

 

________________________________

From: python-list-bounces+brian.mccann=viziant.net at python.org on behalf of Shawn Milochik
Sent: Mon 8/20/2007 1:29 PM
To: python-list at python.org
Subject: Re: reading a line in file



Write some code, even if it doesn't quite work, and post it. We'll
help you fix it.

You can open a file with:  input = open("file.txt", "r")

You can read a line with: someText = input.readline()

You can loop through an open file like this:

for line in input:
    #do something with line


That should get you started.
--
http://mail.python.org/mailman/listinfo/python-list


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From bdesth.quelquechose at free.quelquepart.fr  Wed Aug 29 09:34:05 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 29 Aug 2007 15:34:05 +0200
Subject: Creating a multi-tier client/server application
In-Reply-To: <1188408670.480447.42470@k79g2000hse.googlegroups.com>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
	<46d57888$0$295$426a74cc@news.free.fr>
	<1188398008.538820.21960@d55g2000hsg.googlegroups.com>
	<46d59fa8$0$278$426a74cc@news.free.fr>
	<1188408670.480447.42470@k79g2000hse.googlegroups.com>
Message-ID: <46d5bee0$0$291$426a74cc@news.free.fr>

Jeff a ?crit :
> Goldfish--thanks, I'll check it out.
> 
> 
>>>That, or something similar, may be what I do.  It would mean, however,
>>>developing my own method for transferring objects across the network,
>>
>>Why transfering "objects" ? You only need to transfer data. 
> 
> I suppose I don't need to transfer objects, it just seems like it
> would make it far easier (certainly less repetition of code) 

Why so ???

> to
> program the client-side app.




From kyosohma at gmail.com  Wed Aug 15 11:32:30 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 15 Aug 2007 08:32:30 -0700
Subject: Opinions about this new Python book?
In-Reply-To: <1187117012.088495.247890@q4g2000prc.googlegroups.com>
References: <mailman.1957.1187093157.22759.python-list@python.org>
	<1187096231.194685.86030@m37g2000prh.googlegroups.com>
	<20070814154913.D8C3C1E400A@bag.python.org>
	<8a6b8e350708141020q495b22der4c362ee3df618d82@mail.gmail.com>
	<mailman.1979.1187113641.22759.python-list@python.org>
	<1187117012.088495.247890@q4g2000prc.googlegroups.com>
Message-ID: <1187191950.037749.8050@z24g2000prh.googlegroups.com>

On Aug 14, 1:43 pm, kyoso... at gmail.com wrote:
> On Aug 14, 12:46 pm, "Shawn Milochik" <Sh... at Milochik.com> wrote:
>
>
>
> > Yes, please post back to the list. I saw this book on Amazon, but
> > there's no table of contents listed, nor is there one on the
> > publisher's site.
>
> > Thanks,
> > Shawn
>
> > On 8/14/07, James Matthews <nytrok... at gmail.com> wrote:
>
> > > i got to say that the best python book i bought was Core Python Programming
> > > (2nd)  by Wesly Chun! Aside for all the spelling mistakes and syntax errors
> > > that there are i feel that the book really explained the language well for
> > > someone coming from another programming language!
>
> > > On 8/14/07, Dick Moores <r... at rcblue.com> wrote:
> > > > At 05:57 AM 8/14/2007, kyoso... at gmail.com wrote:
> > > > >On Aug 14, 7:05 am, Dick Moores <r... at rcblue.com> wrote:
> > > > > > I'd appreciate opinions about this new Python book.
>
> > > > > > Title: Python Power!: The Comprehensive Guide
> > > > > > Author:  Matt Telles
> > > > > > Publisher:  Course Technology
> > > > > > Pub. Date:  Jul 27, 2007
> > > > > > Edition:  1st edition
> > > > > > Binding:  Paperback
> > > > > > Pages:  508
> > > > > > ISBN:  1598631586
> > > > > > List Price:  34.99 USD
>
> > > > > > The book on the publisher's website: <http://tinyurl.com/2dkhzg>
>
> > > > > > And at BestBookDeal.com:
> > > > > > <http://www.bestbookdeal.com/book/compare/1598631586>
>
> > > > > > Thanks,
>
> > > > > > Dick Moores
>
> > > > >I just got this book over the weekend. I'll start reading/skimming
> > > > >through it this week and hopefully remember to get back to you.
>
> > > > Thanks!
>
> > > > >  By the
> > > > >way, why do you want to know?
>
> > > > If the experts like it, I'll buy it.
>
> > > > Dick
>
> > > > --
> > > >http://mail.python.org/mailman/listinfo/python-list
>
> > > --
> > >http://www.goldwatches.com/
> > >http://www.jewelerslounge.com
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
>
> > --
> > Please read:http://milocast.com/2007/07/31/this-i-believe/
>
> Here's an abbreviated Table of Contents...just chapter titles. The
> book's table of contents also lists section headers.
>
> Chapter 1: About Python
> Chapter 2: Python Language Overview
> Chapter 3: Tools
> Chapter 4: Data Types
> Chapter 5: Control Flow
> Chapter 6: Input & Output
> Chapter 7: Functions & Modules
> Chapter 8: Exception Handling
> Chapter 9: Object-Oriented Programming
> Chapter 10: Classes and Objects in Python
> Chapter 11: The Python Library
> Chapter 12: The GUI - Tkinter
> Chapter 13: The Web Server - Apache
> Chapter 14: Working with Databases
> Chapter 15: Putting It All Together
> Chapter 16: Python and Graphics
>
> Mike

More on the subject...the writer is very conversational in tone and it
makes for a light read in the first 1 1/2 chapters that I've
completed. I've noticed a couple of sentence errors, but nothing in
the code.

He disses lambdas, which I haven't used for anything either. But I
have seen good uses for them (particularly in Tkinter callbacks),
although they don't seem to be as readable or usable as the rest of
Python. For some reason, the author makes the claim that the term
"Predicate" is "bandied about quite a bit in the literature" of
Python. I have 17 or so Python books and I don't think I've ever seen
this used in conjunction with Python...or in any of the docs I've
skimmed. What the!?

I'll keep you'all posted.

Mike



From deets at nospam.web.de  Fri Aug 24 10:09:33 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 24 Aug 2007 16:09:33 +0200
Subject: Unequal Length Maze
In-Reply-To: <1187963693.724859.116810@m37g2000prh.googlegroups.com>
References: <1187941996.333191.323540@z24g2000prh.googlegroups.com>
	<5j85h5F3t20idU1@mid.uni-berlin.de>
	<1187963693.724859.116810@m37g2000prh.googlegroups.com>
Message-ID: <5j874vF3rvp2nU1@mid.uni-berlin.de>

tomtim20 at gmail.com schrieb:
> On Aug 24, 4:41 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> tomti... at gmail.com schrieb:
>>
>>> Hi All,
>>> what's the best algorithm to solve such problem ?
>>> http://www.stetson.edu/~efriedma/unequal/
>>> I will really appreciate some pieces of code (python).
>> If you pay me 100$ (really a bargain), you get a solution in python.
>>
>> Diez
> 
> What about Barack Obama Autographed Photo ?

I'm living in germany, couldn't care less about USA presedential 
candidates.

If you want others to make your homework, you gotta pay.

Diez


From kw at codebykevin.com  Wed Aug  8 11:17:15 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Wed, 08 Aug 2007 11:17:15 -0400
Subject: Tkinter or wxpython?
In-Reply-To: <hgamo4-p2m.ln1@lairds.us>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
	<7x7io8r6na.fsf@ruckus.brouhaha.com> <hgamo4-p2m.ln1@lairds.us>
Message-ID: <46B9DE7B.3050909@codebykevin.com>

Cameron Laird wrote:
> 
> While those with an artistic eye
> assure me the simplest Tkinter programs look worse
> that corresponding ones built with any other toolkit,
> they behave the most coherently in regards to resizing
> and so on.
> 

"Look worse" can be addressed through extensive means: through theming 
(via Tile, which can now be easily used in Tkinter; see 
http://tkinter.unpy.net/wiki/TileWrapper); and through other aspects of 
UI design, such as color, fonts, and even use of icons. A pyGtk or 
wxPython application that uses old-school Gnome icons, for instance, 
will look ugly. It's quite possible to make an attractive Tkinter 
application using modern, stylish icons that even blends in reasonably 
well on a specific platform (I've done it).

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From dennis.benzinger at gmx.net  Wed Aug  8 07:25:33 2007
From: dennis.benzinger at gmx.net (Dennis.Benzinger@gmx.net)
Date: Wed, 08 Aug 2007 04:25:33 -0700
Subject: RTF 2 Tiff
In-Reply-To: <1186495747.958628.198070@g12g2000prg.googlegroups.com>
References: <1186427712.284976.207560@d30g2000prg.googlegroups.com>
	<tLOdnWiKvpsq4yrbnZ2dnUVZ_qOknZ2d@comcast.com>
	<1186495747.958628.198070@g12g2000prg.googlegroups.com>
Message-ID: <1186572333.184049.42540@19g2000hsx.googlegroups.com>

On Aug 7, 4:09 pm, cjankow... at hbr-inc.com wrote:
> [...]
> We are running Windows Operating Systems.  I was not able to find
> anything that actually would convert the images via command line or
> interface.
> [...]

You could instruct OpenOffice to export the RTF files as PDF files by
using the Python-UNO bridge
and then convert the PDF files to TIFF. Google finds a lot of PDF to
TIFF converters.

Dennis Benzinger



From wolf_tracks at invalid.com  Thu Aug 23 07:33:14 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Thu, 23 Aug 2007 04:33:14 -0700
Subject: Baby Steps, optionDB
In-Reply-To: <13cq7bjl2l03366@corp.supernews.com>
References: <Uk7zi.1531$vU4.979@nlpi068.nbdc.sbc.com>
	<13cq7bjl2l03366@corp.supernews.com>
Message-ID: <rfezi.6451$924.3721@newssvr23.news.prodigy.net>

Thanks. I think I agree about the book comment. I used to dabble with Tcl/Tk 
many years ago. About a year ago, I sold my only book on it. I thought I'd 
never need it again! I wonder if Grayson's (e-book on his site) has improved.

After spending about 90 minutes with IDLE, I'm not real impressed. Is there 
something better?

Dennis Lee Bieber wrote:
> On Wed, 22 Aug 2007 20:41:11 -0700, "W. Watson"
> <wolf_tracks at invalid.com> declaimed the following in comp.lang.python:
> 
>> I'm just playing with Python. It's my first outing. The program is below. I 
>> thought I'd fuss with numbers, and then get bold and try some Tkinter stuff.
>>   I copied the root stuff from a book (Grayson), and get stopped at the 
>> optionDB statement. What's wrong? I get
>>     clError: couldn't open "optionDB": no such file or directory
>> from Idle. Does the Tk code need to be up higher? The book is dated 2000, so 
>> maybe that item no longer exists.
>>
> 	More likely, you need to create a file with standard Tk
> configuration options in the directory you are running from...
> 
> 	A google search on "tk optiondb" brings up a page full of RUBY
> stuff...
> 
> 
> {That wasn't the easiest book to understand either... It seems to have
> been written on the basis that one already knew tcl/tk, and how it
> linked together}

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From bronger at physik.rwth-aachen.de  Mon Aug 27 05:36:14 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Mon, 27 Aug 2007 11:36:14 +0200
Subject: my parser.py isn't imported
References: <874pimqpei.fsf@wilson.homeunix.com>
	<1188166462.066732.123620@i13g2000prf.googlegroups.com>
Message-ID: <87ir715ng1.fsf@wilson.homeunix.com>

Hall?chen!

John Machin writes:

> Torsten Bronger wrote:
>
>> I have a module parser.py in the same directory as the main
>> module.  In the main module, I import "parser".  On Linux, this
>> works as expected, however on Windows, it imports the stdlib
>> parser module.  sys.path[0] points to the directory of my
>> parser.py in both cases.  What went wrong here?
>
> [...]
>
> 2. Failure to RTFabulousM:
> """
> Details of the module searching and loading process are implementation
> and platform specific. It generally involves searching for a ``built-
> in'' module with the given name and then searching a list of locations
> given as sys.path.
> """

Okay, I did the following to avoid this:

import sys, os.path
modulepath = os.path.abspath(os.path.dirname(sys.argv[0]))
def import_local_module(name):
    """Load a module from the local modules directory.

    Loading e.g. a local "parser" module is difficult because on
    Windows, the stdlib parser module is a built-in and thus loaded
    with higher priority.  With
    http://www.python.org/dev/peps/pep-0328/ it may become simpler.

    :Parameters:
      - `name`: name of the module, as it would be given to
        ``import``.

    :Return:
      the module object or ``None`` if none was found

    :rtype:
      module
    """
    import imp
    try:
        return sys.modules[name]
    except KeyError:
        pass
    fp, pathname, description = imp.find_module(name, [modulepath])
    try:
        return imp.load_module(name, fp, pathname, description)
    finally:
        # Since we may exit via an exception, close fp explicitly.
        if fp:
            fp.close()

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From drewlist at gmail.com  Fri Aug  3 23:38:40 2007
From: drewlist at gmail.com (drewlist at gmail.com)
Date: Fri, 03 Aug 2007 20:38:40 -0700
Subject: bias in random.normalvariate??
Message-ID: <1186198720.800007.38800@k79g2000hse.googlegroups.com>

I'm a Python newbie and certainly no expert on statistics, but my wife
was taking a statistics course this summer and to illustrate that
sampling random numbers from a distribution and taking an average of
the samples gives you a random number as the result (bigger sample ->
smaller variance in the calculated random number, converging in on the
mean of the original distribution), I threw together this program:

#! /usr/bin/python

import random;

i=1
samplen=100
mean=130
lo=mean
hi=mean
sd=10
sum=0
while(i<=samplen):
	x=random.normalvariate(mean,sd)
	#print x
	if x<lo: lo=x
	if x>hi: high=x
	sum+=x
	i+=1
print 'sample mean=', sum/samplen, '\n'
print 'low value =', lo
print 'high value=', high
---------------------------------------------------------
But the more I run the darn thing, the stranger the results look to
me.
random.normalvariate is defined on page 89 of

http://www-acc.kek.jp/WWW-ACC-exp/KEKB/Control/Python%20Documents/lib.pdf

as generating points from a normal distribution with mean and standard
deviation  given by the arguments.   But my test program consistently
comes up with sample means that are less than the mean of the
distribution.   The lo value is consistently much lower relative to
the mean than the high value is higher than the mean.   That is, it
looks to me like the normalvariate function is biased.

Part of my being a Python newbie is I'm not really sure where to go to
discuss this problem.   If this group isn't the right place, do feel
free to point me to where I ought to go.

I'm running Ubuntu Dapper and "python  -V" says I've got Python
2.4.3.  I tried looking in random.py down under /usr/lib but find no
clues there as to the version of the random module on my machine.   Am
I missing something?

/usr/lib/python2.4$ ls -l random.py
-rw-r--r-- 1 root root 30508 2006-10-06 04:34 random.py

I added the lo and high stuff to my test program out of fear that I
was running into something funky in adding up 100 floating point
numbers.   That would be more of a worry if the sample size was much
bigger, but lo and high showed apparent bias quite aside from the
calculation of the mean.

Am I committing some other obvious statistical or Python blunder?
e.g. Am I mis-understanding what random.normalvariate is supposed to
do?



From carsten at uniqsys.com  Fri Aug 17 20:42:53 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 17 Aug 2007 20:42:53 -0400
Subject: Question about 'for' loop
In-Reply-To: <496954360708171545m6a0eff61la5fe270145246eab@mail.gmail.com>
References: <496954360708171545m6a0eff61la5fe270145246eab@mail.gmail.com>
Message-ID: <1187397773.3327.12.camel@localhost.localdomain>

On Fri, 2007-08-17 at 17:45 -0500, Robert Dailey wrote:
> [...]
> Secondly, I'm wondering how I can use this method of a for loop to
> append strings to strings in a list. For example:
> 
> mylist = [
> "Hello ",
> "Hello again "
> ]
> 
> I should be able to do this: 
> 
> print [ i + "World" for i in mylist ]
> 
> Which should yield the output:
> 
> ["Hello World", "Hello again world"]
> 
> However, instead I get an error message saying "TypeError: cannot
> concatenate 'str' and 'list' objects" 
> 
> How can I achieve the above? Thanks for reading.

You must have done something different than what you're describing above
to get that error message. The code you posted works as expected:

>>> mylist = [
... "Hello ",
... "Hello again "
... ]
>>> print [ i + "World" for i in mylist ]
['Hello World', 'Hello again World']

-- 
Carsten Haese
http://informixdb.sourceforge.net




From steve at holdenweb.com  Wed Aug  1 08:30:15 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 01 Aug 2007 08:30:15 -0400
Subject: access the name of my method inside it
In-Reply-To: <5hb80tF3inuf2U7@mid.uni-berlin.de>
References: <1185959202.302467.276080@x35g2000prf.googlegroups.com>	<5hb1ebF3inuf2U6@mid.uni-berlin.de>	<mailman.1427.1185966164.22759.python-list@python.org>
	<5hb80tF3inuf2U7@mid.uni-berlin.de>
Message-ID: <f8pucp$ubd$1@sea.gmane.org>

Marc 'BlackJack' Rintsch wrote:
> On Wed, 01 Aug 2007 07:01:42 -0400, Steve Holden wrote:
> 
>> Marc 'BlackJack' Rintsch wrote:
>>> On Wed, 01 Aug 2007 09:06:42 +0000, james_027 wrote:
>>>
>>>> for example I have this method
>>>>
>>>> def my_method():
>>>>     # do something
>>>>
>>>>     # how do I get the name of this method which is my_method here?
>>> Why do you need this?  There are ways but those are not really good for
>>> production code.
>>>
>> Maybe he wants to write a recursive method?
>>
>> Once way is to call self.__calss__.mymethod(self). Ugly, isn't it?
> 
> Ugly yes, unnecessary convoluted yes, solution no.  You typed `my_method`
> in the source.  The OP wants to know how to avoid that.
> 
>>  >>> class p:
>> ...   def mymethod(self, n):
>> ...     if n <= 1:
>> ...       return 1
>> ...     else:
>> ...       return n * self.__class__.mymethod(self, n-1)
> 
> Why not simply ``self.mymethod(n - 1)`` instead!?
> 
Well, absolutely no reason if you want to go making things simple ;-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From tjreedy at udel.edu  Sat Aug 25 14:17:42 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 25 Aug 2007 14:17:42 -0400
Subject: How to find parent function/class of generators?
References: <b410cefd0708250119p7b4080e0v186967c0ef60f720@mail.gmail.com>
Message-ID: <fapro5$706$1@sea.gmane.org>


"J. A. Aczel" <seventhhs at gmail.com> wrote in message 
news:b410cefd0708250119p7b4080e0v186967c0ef60f720 at mail.gmail.com...
| Hello all. I think I should explain my problem in detail, so everyone
| understands what I'm trying to do and why. There may be a better
| approach to the whole problem then I am using.
|
| I am working on a game, with most of my AI code & such divided up into
| generator functions (really coroutines that don't take any input)
| stored in a dictionary called Director.tasks, and handled by a simple
| cooperative multitasking engine. The dictionary key is the generator
| object to be advanced, and the value is the frame number at which it
| should next be executed. The generator objects yield the delay before
| their next execution.
|
|    def realtick(self):
|        Director.frame += 1
|        for task in Director.tasks.items():
|            if task[1] <= Director.frame:
|                try:
|                    result = task[0].next()
|                    if result == -1:
|                        Director.tasks.pop(task[0])
|                    else:
|                        Director.tasks[task[0]] = Director.frame + result
|                except:
|                    Director.tasks.pop(task[0])
|
| Why did I use a dictionary? Originally I had a list of lists, but I
| thought converting it to a dictionary would make removing tasks from
| the queue easier, the main difficulty I'm having. But it didn't,
| because I can't identify the

The standard way of storing multiple tasks for future execution at a 
varietyu of times is a priority queue.  Python's heap class (module) is one 
way to implement such.

| Due to the framework I'm using, I think (or possibly just the Python
| language?) in-game objects aren't actually destroyed when they're
| removed from the game world. Thus, when an enemy or something with
| associated tasks 'dies', the tasks merrily continue executing... and
| the game will have a bunch of enemies who no longer have sprites,
| movement abilities or collision checks, but otherwise are none the
| worse for wear for having been destroyed. It's a big mess. So I need a
| way to remove all tasks associated with a game object from the queue,
| upon the object's  'destruction'.

I suspect you need to keep a list of tasks associated with a creature with 
each creature.  When creature dies, remove them from the queue or keep a 
set of dead tasks that tasks removed from the queue are checked against 
before being executed.

Good luck.

tjr







From mbeachy at gmail.com  Fri Aug 17 10:12:01 2007
From: mbeachy at gmail.com (mbeachy at gmail.com)
Date: Fri, 17 Aug 2007 14:12:01 -0000
Subject: unexpected optparse set_default/set_defaults behavior
Message-ID: <1187359921.637383.268380@22g2000hsm.googlegroups.com>

Some rather unexpected behavior in the set_default/set_defaults
methods for OptionParser that I noticed recently:

>>> import optparse
>>> parser = optparse.OptionParser()
>>> parser.add_option("-r", "--restart", dest="restart", action="store_true")
<Option at 0x-483b3414: -r/--restart>
>>> parser.defaults
{'restart': None}
>>> parser.set_default("retart", False)
>>> parser.defaults
{'retart': False, 'restart': None}

Why does set_default not raise an exception when passed a key that it
doesn't recognize?

Bad typysts bewaer.

The only reason I can think not to raise an exception is so that
defaults can be defined before the options are added. Is there some
use case that I'm not thinking of here? I realize that changing this
could break some existing scripts, but I'm still tempted to file this
as a bug.

Mike



From carsten at uniqsys.com  Fri Aug 31 00:10:17 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 31 Aug 2007 00:10:17 -0400
Subject: list index()
In-Reply-To: <1188529598.134837.157530@x35g2000prf.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<87bqcod2gq.fsf@benfinney.id.au>
	<1188517370.998114.119940@q4g2000prc.googlegroups.com>
	<mailman.174.1188517712.28954.python-list@python.org>
	<1188529598.134837.157530@x35g2000prf.googlegroups.com>
Message-ID: <20070831040746.M7133@uniqsys.com>

On Thu, 30 Aug 2007 20:06:38 -0700, zzbbaadd wrote
> On Aug 30, 4:48 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> > > It suddenly dawned on me that what would be best would be a contains()
> > > (or IN syntax for those who can't afford to wait) for lists.
> >
> > > if mylist.contains("hello):
> >
> > Genius. Why didn't anyone think of that before?
> 
> With an attitude like that Chris, don't expect to be getting an 
> invite to beta test my Python 3 fork.

Welcome to comp.lang.python, where laziness is punished with brutal sarcasm.

--
Carsten Haese
http://informixdb.sourceforge.net



From steve at holdenweb.com  Wed Aug 29 18:20:19 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 29 Aug 2007 18:20:19 -0400
Subject: re compiled object result caching?
In-Reply-To: <pan.2007.08.29.21.54.50.317879@datallegro.com>
References: <1188417101.936530.182480@50g2000hsm.googlegroups.com>	<mailman.122.1188423947.28954.python-list@python.org>
	<pan.2007.08.29.21.54.50.317879@datallegro.com>
Message-ID: <fb4rf4$9m1$1@sea.gmane.org>

Dan Stromberg - Datallegro wrote:
> On Wed, 29 Aug 2007 17:45:36 -0400, Steve Holden wrote:
> 
>> Dan wrote:
>>> foo_re = re.compile(r"foo(bar)")
>>> # . . .
>>> if foo_re.search(line):
>>>     foo_re.last_result().group(1)
>>>
>> If you wanted to implement this I don't really see why a method call is 
>> necessary. It would surely only need to be a simple attribute?
>>
>> Of course you then introduce the possibility that someone will reference 
>> if before using the RE in a search, plus it still requires separate 
>> storage if you want the ability to use the same RE for two different 
>> matches and compare the match results.
> 
> I've long felt that publicly accessible attributes probably should be
> syntactic sugared to look like accessor methods, a bit like how __add__
> ends up being + - so that if your attribute ever needs to become methods
> (say, it started out life as a unidimensional thing, but later needs to
> be a flattening of 3 dimensions or something), you won't necessarily need
> to change depenent code.
> 
> But are methods a lot more expensive in python than referencing other
> kinds of attributes?
> 
Well, given that they are procedure calls, yes. There's also other magic 
over and above that.

The property() function is a way of making what appear to be attribute 
accesses become method calls. Your intuition is taking you the wrong 
way: if you need an accessor method then just turn the normal attribute 
into a property. Given that mechanism, your wish to use accessor methods 
is definitely anti-pythonic.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From zentraders at gmail.com  Fri Aug 10 14:37:06 2007
From: zentraders at gmail.com (Zentrader)
Date: Fri, 10 Aug 2007 11:37:06 -0700
Subject: float to string with different precision
In-Reply-To: <f9h6kj$sj6$00$1@news.t-online.com>
References: <1186731617.128913.279360@m37g2000prh.googlegroups.com>
	<f9h6kj$sj6$00$1@news.t-online.com>
Message-ID: <1186771026.472118.137090@d30g2000prg.googlegroups.com>

On Aug 10, 1:12 am, Peter Otten <__pete... at web.de> wrote:
>  zunbe... at gmail.com wrote:
> > I have to print float numbers to a file. Each float should be 5
> > characters in width (4 numbers and the decimal point).
> > My problem is that I do not now how to specify float to have different
> > numbers of decimals. For example
>
> > 5.32 -> 5.320
> > 10.356634 -> 10.357
> > 289.234 -> 289.2
>
> > In the string formating operations only fixed number of decimal digits
> > is allow.
> >>> ["%#.4g" % f for f in [5.32, 10.356634, 289.234, 123456789.]]
>
> ['5.320', '10.36', '289.2', '1.235e+08']
>
> Found by playing around with format strings, so no guarantees.
>
> Peter

If the above does not work
[/code]test_list = [ 5.32, 10.35634, 289.234 ]
for num in test_list :
   str_num = "%11.5f" % (num)       ## expand to at least 5
   print str_num, "-->", str_num.strip()[:5][/code]



From bbrown at speakeasy.net  Fri Aug 31 00:31:21 2007
From: bbrown at speakeasy.net (Robert Brown)
Date: Fri, 31 Aug 2007 00:31:21 -0400
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
Message-ID: <m2wsvc1g12.fsf@manolo-blahnik.bibliotech.com>


aleax at mac.com (Alex Martelli) writes:
> DbC and allegedly rigorous compile-time typechecking (regularly too weak
> due to Eiffel's covariant vs countervariant approach, btw...), based on
> those empirical results, appear to be way overhyped.

My experience with writing Eiffel code was a bit different.  Integrating
code from multiple sources happened much faster than I expected, and the
code ran reliably.  There were a couple of instances where previously
uncombined code was linked together and worked on the first run.

Perhaps more important, however, is that method contracts provide important
documentation about how each method is supposed to work -- what it assumes
and what must be true when it returns.  Using Eiffel changed my coding
process.  Often I'd write the pre- and postconditions first, then write the
method body, just as programmers today often write unit tests first.
Thinking carefully about the contracts and writing them down, so they could
be verified, makes the code more reliable and maintainable.  The contracts
are part of the source code, not a fuzzy concept in each programmer's head.

The contracts are also useful when discussing the code with domain experts
who are not programmers.  They can read and understand the "flat short" view
of a class, which includes all the method names, method comments, and
contracts, but leaves out the method implementations.  Here's an example,
Eiffel's String class: http://www.nenie.org/eiffel/flatshort/string.html

In any case, I'm still not sure whether it would be useful to integrate DbC
into Python.  A library that implements DbC for Common Lisp has not gotten
much traction in that community, which has a similar style of software
development.  Perhaps it's just too much to ask that programmers write both
unit tests and method contracts.

bob


From 5502109103600001 at t-online.de  Sat Aug 25 06:10:29 2007
From: 5502109103600001 at t-online.de (Josef Moellers)
Date: Sat, 25 Aug 2007 12:10:29 +0200
Subject: Regular expression use
In-Reply-To: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
Message-ID: <faov6l$s7k$01$2@news.t-online.com>

Nick Maclaren wrote:
> For reasons that I won't explain, as they are too complicated
> and not terribly relevant, I am interested in discovering what
> people actually use regular expressions for.  Not the subject
> domain, but the construction of the regular expressions.
> 
> I know about computer scientists and parsing, and I know about
> the use of relatively simple ones for things like extracting
> HTML links from Web pages.  But I don't have much feel for the
> (probably rare but difficult) uses of more complex ones for
> other purposes.  I have heard of several such uses, but don't
> have an overall idea of what is going on.
> 
> Any pointers appreciated, to more-or-less anything.

I just don't get what you're after!
Lots of data is available in text form, so sifting though it requires 
regular expressions.
A better question would be: what do you use Perl for, as I'd say most 
Perl programs utilize REs at some point or the other.
But IIRC we've had that thread already.

-- 
Mails please to josef dot moellers
and I'm on gmx dot de.


From uymqlp502 at sneakemail.com  Thu Aug 30 02:08:43 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Wed, 29 Aug 2007 23:08:43 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188441554.884249.50110@22g2000hsm.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<pan.2007.08.29.23.17.34.304019@datallegro.com>
	<1188441554.884249.50110@22g2000hsm.googlegroups.com>
Message-ID: <1188454123.777083.57480@x35g2000prf.googlegroups.com>


> I disagree. IMO automatic testing is thousands of times better than
> design by contract and Python has already all the support you need
> (unittest, doctest, py.test, nose, ...)

In theory, anything you can verify with "design by contract" you can
also verify with unittest and the rest. However, "design by contract"
has a major practical advantage: if you have real (or simulated)
inputs available, you don't need to write a test driver or generate
test inputs for each class or function.

All you need to do is to run your program with the real (or simulated)
inputs, all the internal data that gets passed around between classes
and functions gets generated as usual, and everything gets tested
automatically. In other words, you are spared the potentially
considerable effort of generating and storing samples of all the
internal data that gets passed around internally.

You may want to do unit tests also, of course. Separate unit tests
will give you more control and allow you to test individual classes
and functions using a wider variety of inputs. But if your design by
contract is comprehensive (i.e., passing it guarantees correct
functioning of your code), then your unit tests can simply make use of
the tests already available in the design by contract. So you've done
no extra work in setting up the design by contract anyway.

Another significant advantage of "design by contract" is that the
tests are all right there in your source code, where they are much
less likely to get lost or ignored by subsequent programmers who need
to maintain the code.  Relying on separate units tests is a bit like
relying on extended "comments" or design documents that are separate
from the code. Yes, those are certainly useful, but they do not
eliminate the need for comments in the code.



From michele.simionato at gmail.com  Wed Aug 29 01:58:28 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 29 Aug 2007 05:58:28 -0000
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188364909.397692.209170@q4g2000prc.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
Message-ID: <1188367108.393207.241970@g4g2000hsf.googlegroups.com>

On Aug 29, 7:21 am, Russ <uymqlp... at sneakemail.com> wrote:
>
> Thanks for that information. That's too bad, because it seems like a
> strong positive capability to add to Python. I wonder why the cold
> reception. Were there problems with the idea itself or just the
> implementation? Or is it just a low priority?

Why do you think that would ad a strong positive capability?
To me at least it seems a big fat lot of over-engineering, not
needed in 99% of programs. In the remaining 1%, it would still not
be needed since Python provides out of the box very powerful
metaprogramming capabilities so that you can implement
yourself the checks you need, if you really need them.

> In any case, I guess it is still perfectly usable even if it isn't
> part of the core Python. Has anyone used it? If so, how well did it
> work? Thanks.

Dunno, I would be curious myself to know if there are users
of these frameworks (including AOP frameworks in Python) or
if they are just exercises.

       Michele Simionato



From khamenya at gmail.com  Thu Aug 30 11:10:19 2007
From: khamenya at gmail.com (Valery)
Date: Thu, 30 Aug 2007 15:10:19 -0000
Subject: SOCKS5 + python = pain in you-know-where ?
Message-ID: <1188486619.763947.47500@r34g2000hsd.googlegroups.com>

Hi all

just googled both the web and groups. Who could believe in that:
nothing simple, helpful and working concerning SOCKS5 support in
python.

Anyone got success here?

Regards,

Valery.



From nick at craig-wood.com  Tue Aug 28 16:30:06 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 28 Aug 2007 15:30:06 -0500
Subject: tempfile.mkstemp and os.fdopen
References: <1188323759.955043.317630@19g2000hsx.googlegroups.com>
Message-ID: <slrnfd90i1.rol.nick@irishsea.home.craig-wood.com>

billiejoex <gnewsg at gmail.com> wrote:
>  I'm trying to generate a brand new file with a unique name by using
>  tempfile.mkstemp().
> 
>  Moreover, I'd like to know if I'm doing fine. Does this approach avoid
>  race conditions

This is a reasonably secure way of doing things.  It can't race under
unix at least (dunno about windows) unless your dir is on NFS.

If you want more security then make sure dir isn't publically
writeable.

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


From iclark at mail.ewu.edu  Thu Aug  9 18:36:09 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Thu, 09 Aug 2007 15:36:09 -0700
Subject: programmatically define a new variable on the fly
In-Reply-To: <1186697500.024593.303820@x35g2000prf.googlegroups.com>
References: <1186697500.024593.303820@x35g2000prf.googlegroups.com>
Message-ID: <f9g4sp$dc2$1@sea.gmane.org>

Lee Sander wrote:
> Hi,
> 
> I would like to define a new variable which is not predefined by me.
> For example,
> I want to create an array called "X%s" where "%s" is to be determined
> based on the data I am processing. So, for example, if I the file
> I'm reading has
> g 99
> on the first line, I want to create a new variable  called "Xg" whose
> length
> is 99.
> I tried eval("Xg=[0]*99") but that did not work.
> 
> any help would be greatly appreciated
> Lee
> 

 >>> Xg
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
NameError: name 'Xg' is not defined
 >>> namespace = globals()
 >>> var_name = 'Xg'
 >>> var_value = [0] * 9
 >>> namespace[var_name] = var_value
 >>> Xg
[0, 0, 0, 0, 0, 0, 0, 0, 0]

Ian



From http  Sat Aug  4 18:05:23 2007
From: http (Paul Rubin)
Date: 04 Aug 2007 15:05:23 -0700
Subject: Submit web form only client-side with Python? COM?
References: <1186257525.483524.5570@j4g2000prf.googlegroups.com>
Message-ID: <7xmyx7ot0c.fsf@ruckus.brouhaha.com>

goldtech <goldtech at worldpost.com> writes:
> So I can present the user with an HTML form in it - but how can I
> write the form data to a local file on my work station?

The simplest way is with the cgi and CGIHTTPServer modules.  You'd
write your form in an html file, with the target set to a Python
script that you'd write as a cgi.  Then you'd write a trivial CGI HTTP
server (look at the example code in the comments) with CGIHTTPServer.
The user would point their browser at your server (you could make a
desktop shortcut for that), the browser shows the html file, and the
submit button sends the form contents to your cgi.

This is very basic, old-school web programming, not as flexible or
high-performance as using the fancy frameworks, but a lot simpler for
limited applications like what you're describing.


From yinglcs at gmail.com  Sun Aug 26 02:05:11 2007
From: yinglcs at gmail.com (yinglcs at gmail.com)
Date: Sun, 26 Aug 2007 06:05:11 -0000
Subject: How can I use python for file processing
Message-ID: <1188108311.154118.229610@50g2000hsm.googlegroups.com>

Hi,

I am trying to use python for file processing.
Suppose I have a file like this:
I want to build a Hashmap between the line "begin_QOS_statistics" and
"end_QOS_statistics"
and for each line I want to put the first text as the key of the hash
table and the second text as the value.



Received RTCP "BYE" on "audio/MPA" subsession (after 89 seconds)
Received RTCP "BYE" on "video/MP4V-ES" subsession (after 89 seconds)
begin_QOS_statistics
server_availability     100
stream_availability     100
subsession      video/MP4V-ES
num_packets_received    3529
num_packets_lost        0
elapsed_measurement_time        82.302305
kBytes_received_total   3756.422000
measurement_sampling_interval_ms        100
kbits_per_second_min    0.000000
kbits_per_second_ave    365.134075
kbits_per_second_max    2634.760139
packet_loss_percentage_min      0.000000
packet_loss_percentage_ave      0.000000
packet_loss_percentage_max      0.000000
inter_packet_gap_ms_min 2147483.647000
inter_packet_gap_ms_ave 0.000000
inter_packet_gap_ms_max 0.000000
subsession      audio/MPA
num_packets_received    1414
num_packets_lost        0
elapsed_measurement_time        82.302305
kBytes_received_total   1187.644000
measurement_sampling_interval_ms        100
kbits_per_second_min    0.000000
kbits_per_second_ave    115.442113
kbits_per_second_max    1132.007640
packet_loss_percentage_min      0.000000
packet_loss_percentage_ave      0.000000
packet_loss_percentage_max      0.000000
inter_packet_gap_ms_min 0.022000
inter_packet_gap_ms_ave 52.214517
inter_packet_gap_ms_max 140.955000
end_QOS_statistics



From ricaraoz at gmail.com  Thu Aug 23 11:05:38 2007
From: ricaraoz at gmail.com (=?UTF-8?B?UmljYXJkbyBBcsOhb3o=?=)
Date: Thu, 23 Aug 2007 12:05:38 -0300
Subject: IDE for Python
In-Reply-To: <hTPyi.4052$Oo.2475@newssvr17.news.prodigy.net>
References: <mailman.55.1187690455.32294.python-list@python.org>	<1187698999.545439.322600@k79g2000hse.googlegroups.com>	<mailman.91.1187742207.32294.python-list@python.org>
	<hTPyi.4052$Oo.2475@newssvr17.news.prodigy.net>
Message-ID: <46CDA242.3010108@bigfoot.com>

I V wrote:
> On Tue, 21 Aug 2007 21:23:25 -0300, Ricardo Ar?oz wrote:
>> 	Do you know if for in-house development a GPL license applies? (Qt4
>> and/or Eric4).
> 
> (I'm not sure if I've understood your question right)
> 
> If you distribute an app that _uses_ PyQT, you have to comply with the GPL
> (or buy a license from Trolltech), but note that this doesn't really have
> anything to do with Eric4. Running Eric4 doesn't require a license (either
> the GPL or Trolltech), and code you write using Eric4 doesn't have to be
> licensed according to the GPL either.

I think they key word would be 'distribute'. I don't plan to distribute
the software. It will be used in-house for a commercial company which
pays for my time, they'll keep the source code but they won't be
distributing or selling it. Am I ok with QT4 ? (this is Windows).

TIA





From erfc at caballista.org  Mon Aug 20 21:19:33 2007
From: erfc at caballista.org (Art Deco)
Date: Mon, 20 Aug 2007 19:19:33 -0600
Subject: What does this thread have to do with classical music,
References: <7nnh7350b5h25ghocra72b23mmsnnkj8bh@4ax.com>
	<469445b3$0$4819$8f2e0ebb@news.shared-secrets.com>
	<4694e124$0$97214$892e7fe2@authen.yellow.readfreenews.net>
	<46957ef1$0$10227$8f2e0ebb@news.shared-secrets.com>
	<46963170$0$97261$892e7fe2@authen.yellow.readfreenews.net>
	<46981df7$0$12095$8f2e0ebb@news.shared-secrets.com>
	<46990784$0$97223$892e7fe2@authen.yellow.readfreenews.net>
	<4699297c$0$4706$4c368faf@roadrunner.com>
	<140720071431044860%erfc@caballista.org>
	<46a3a1a7$0$15115$8f2e0ebb@news.shared-secrets.com>
	<220720072148091069%erfc@caballista.org>
	<46a5385d$0$4832$8f2e0ebb@news.shared-secrets.com>
	<250720071834457296%erfc@caballista.org>
	<46aceaa5$0$13281$8f2e0ebb@news.shared-secrets.com>
	<290720071853200863%erfc@caballista.org>
	<46b12539$0$4807$8f2e0ebb@news.shared-secrets.com>
	<010820072033374341%erfc@caballista.org>
	<46c63474$0$4844$8f2e0ebb@news.shared-secrets.com>
	<180820070841431634%erfc@caballista.org>
	<46c90727$0$14433$8f2e0ebb@news.shared-secrets.com>
Message-ID: <200820071919337538%erfc@caballista.org>

ah <splifingate at gmail.com> wrote:
>Art Deco wrote:
>> ah <splifingate at gmail.com> wrote:
>>>Art Deco wrote:
>>>> ah <splifingate at gmail.com> wrote:
>>>>>Art Deco wrote:
>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>Art Deco wrote:
>>>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>>>Art Deco wrote:
>>>>>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>>>>>Art Deco wrote:
>>>>>>>>>>>> Who wrote?
>>>>>>>>>>>> 
>>>>>>>>>>>> 
>>>>>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>>>>>> 
>>>>>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>>>>>> 
>>>>>>>>>>>> How many more times will you be asking the same tired, lame
>>>>>>>>>>>> questions,
>>>>>>>>>>>> Tholen?
>>>>>>>>>>>
>>>>>>>>>>>Till 2056?
>>>>>>>>>> 
>>>>>>>>>> At that point, he will have made the Thirty Years Pset War look like
>>>>>>>>>> 1967 in the Sinai.
>>>>>>>>>
>>>>>>>>>It must have been Hell to keep a garden during those times.
>>>>>>>>>
>>>>>>>>>Did they all eat jerky, or what?
>>>>>>>> 
>>>>>>>> Worse -- worm-laden hardtack.
>>>>>>>
>>>>>>>Luxury!
>>>>>>>
>>>>>>>Why, I remember when I was a lad . . . we used to watch the local churls
>>>>>>>across the fences eating that well.
>>>>>>>
>>>>>>>We only had millings (and (occasionally) water) on Tuesdays and Fridays.
>>>>>> 
>>>>>> Grog and hardtack, life is good!
>>>>>
>>>>>?Viva la basura!
>>>> 
>>>> Vivat les ordures!
>>>
>>>Vivara los trunctiato!
>> 
>> das Leben ist gut!
>
>de Handel esta disgustipado!

la vita ? buona!

-- 
Official Overseer of Kooks and Saucerheads for alt.astronomy
Wee Davie Tholen is a grade-school lamer
Trainer and leash holder of:
  Honest "Clockbrain" John
  nightbat "fro0tbat" of alt.astronomy
  Tom "TommY Crackpotter" Potter
  <http://www.caballista.org/auk/kookle.php?search=deco>

"You really are one of the litsiest people I know, Mr. Deco."
  --Kali, quoted endlessly by David Tholen as evidence of "something"

"I am claiming that you believe ah's family name is "ah",
Deco, and I substantiated that claim."
  --David Tholen

"Quite a kook-out, Deco.  You've been frothing even more
ever since I demonstrated how you believe that ah's family
name is "ah"."
  --David Tholen


From paddy3118 at googlemail.com  Sun Aug 19 11:55:22 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sun, 19 Aug 2007 15:55:22 -0000
Subject: yet another indentation proposal
In-Reply-To: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
Message-ID: <1187538922.849174.94870@19g2000hsx.googlegroups.com>

On Aug 18, 7:22 pm, "Aaron" <cajnnjo... at fjireanjtjprodjuctijons.com>
wrote:
> Hello all.
>
> I realize that proposals dealing with alternatives to indentation  have been
> brought up (and shot down) before, but I would like to take another stab at
> it, because it is rather important to me.
>
> I am totally blind, and somewhat new to Python.  I put off learning Python
> for a long time, simply because of the indentation issue.  There is no easy
> way for a screenreader user, such as my self, to figure out how much a
> particular line of code is indented.  A sited person simply looks down the
> column to make sure that everything lines up.  I, on the other hand,
> generally find my self counting a lot of spaces.
>
> Naturally, there are many other special circumstances in which depending on
> whitespace is impractical, but they have already been mentioned in previous
> threads on the topic, so I won't bother rehashing them.
>
> Borrowing from another proposal, I would submit that the opening block and
> closing block markers could be _{ and }_ respectively.  If it seems that
> there is even a modicum of support, I'll write up a more complete proposal.
> But in short, an _{ will signify to the interpreter that one level of
> indentation is to be added to the current level, that all the statements
> that follow (until the closing _}) are to be understood to be at that level,
> and that all whitespace at the beginning of lines, or lack there of, is to
> be ignored.
>
> I realize that this would result in some esthetically ugly code, and so
> naturally a simple tool to convert this type of block indication back to
> "normal indented format" should also be developed.
>
> Any thoughts or suggestions?
>
> I sincerely hope that this proposal can be given some serious consideration,
> and not simply dismissed as sacrilege.  There are many blind programmers,
> and I would hate to see them opt to learn other languages simply because of
> this one issue.
>
> Thanks.
>
> Aaron
>
> --
> To reply directly, remove j's from email address.

Oh wow. it never crossed my mind...

Can screen reaaderss be customized?
Maybe their is a way to get the screen reader to say indent and dedent
at thee appropriate places?
Or maybe a filter to put those wordds into the source?

- Paddy.



From kyosohma at gmail.com  Wed Aug  1 09:54:21 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 01 Aug 2007 13:54:21 -0000
Subject: Equivalent to gzinflate() function in PHP.
In-Reply-To: <pan.2007.08.01.13.44.47.273887@artcom.pl>
References: <pan.2007.08.01.13.44.47.273887@artcom.pl>
Message-ID: <1185976461.491418.20230@i38g2000prf.googlegroups.com>

On Aug 1, 8:44 am, Adam Kubica <coyot... at artcom.pl> wrote:
> Hellou.
>
> Anybody know about code that work equivalent to gzinflate()
> function used in PHP?
>
> I search via google but I don't found anything sensible :-(

I'm not sure what gzinflate does, but it looks like it's some kind of
compression/decompression method. Python can do that. Check out the
following links:

http://www.python.org/doc/lib/module-gzip.html
http://www.python.org/doc/lib/module-zlib.html
http://python.active-venture.com/lib/module-bz2.html

Hopefully this is the type of thing you were looking for.

Mike



From aine_canby at yahoo.com  Tue Aug 21 15:13:38 2007
From: aine_canby at yahoo.com (aine_canby at yahoo.com)
Date: Tue, 21 Aug 2007 12:13:38 -0700
Subject: Python Path Dictionary
In-Reply-To: <mailman.66.1187710972.32294.python-list@python.org>
References: <1187706985.476483.292820@g4g2000hsf.googlegroups.com>
	<mailman.66.1187710972.32294.python-list@python.org>
Message-ID: <1187723618.729114.19020@19g2000hsx.googlegroups.com>

On 21 Aug, 17:42, Gary Herron <gher... at islandtraining.com> wrote:
> aine_ca... at yahoo.com wrote:
> > Hi,
>
> > Do the Python Paths come in the form of a dictionary where I can
> > access a particular path my its key in the registry?
>
> > For example, in PythonWin Tools>>Edit Python Paths shows the name as
> > well of the address of each path
>
> > Thanks,
>
> > Aine
>
> If by "Python Paths" you mean the list of directories searched when
> doing an import, then it is a list (not a dictionary and you can access
> it as sys.path.
>
> Here it is on both my Linux and Windows systems:
>
> >>> import sys
> >>> sys.path
>
> ['', '/usr/lib/portage/pym', '/usr/lib/python25.zip',
> '/usr/lib/python2.5', '/usr/lib/python2.5/plat-linux2',
> '/usr/lib/python2.5/lib-tk', '/usr/lib/python2.5/lib-dynload',
> '/usr/lib/python2.5/site-packages',
> '/usr/lib/python2.5/site-packages/Numeric',
> '/usr/lib/python2.5/site-packages/PIL',
> '/usr/lib/python2.5/site-packages/gtk-2.0']
>
> >>> import sys
> >>> sys.path
>
> ['', 'C:\\WINDOWS\\system32\\python24.zip', 'C:\\cygwin\\home\\Gary',
> 'c:\\python24\\DLLs', 'c:\\python24\\lib',
> 'c:\\python24\\lib\\plat-win', 'c:\\python24\\lib\\lib-tk',
> 'c:\\python24', 'c:\\python24\\lib\\site-packages',
> 'c:\\python24\\lib\\site-packages\\Numeric',
> 'c:\\python24\\lib\\site-packages\\PIL',
> 'c:\\python24\\lib\\site-packages\\gtk-2.0',
> 'c:\\python24\\lib\\site-packages\\win32',
> 'c:\\python24\\lib\\site-packages\\win32\\lib',
> 'c:\\python24\\lib\\site-packages\\Pythonwin']

Thanks.

Yeah, that's exactly what I'm talking about, but I don't want the
list, I want to access a certain path by name. I'm guessing I'm going
to have to write a function to do this that reads the value from the
registry.



From sadfub at gmx.net  Tue Aug 21 04:21:47 2007
From: sadfub at gmx.net (sadfub at gmx.net)
Date: Tue, 21 Aug 2007 10:21:47 +0200
Subject: setproctitle
Message-ID: <46CAA09B.5000208@gmx.net>

Hi,

is there still no possibility to easly set the process title? I found a
third party addon here:
http://mail.python.org/pipermail/python-list/2004-August/273115.html.
Shouldn't "import posix" do the thing? I am using python 2.5.

Since I write a python daemon here, I need to set the correct name,
which is needed by the start_daemon tool to write the pid file.


From python at jayloden.com  Thu Aug  9 12:20:07 2007
From: python at jayloden.com (Jay Loden)
Date: Thu, 09 Aug 2007 12:20:07 -0400
Subject: tests
In-Reply-To: <f9fdd5$pqv$1@sea.gmane.org>
References: <mailman.1792.1186665714.22759.python-list@python.org>	<1186666919.456036.120270@d30g2000prg.googlegroups.com>	<f9f70t$dpm$1@solaris.cc.vt.edu>	<1186670584.148181.180040@r34g2000hsd.googlegroups.com>	<46bb2511$0$10103$7b0f0fd3@mistral.news.newnet.co.uk>	<1186671660.912133.225810@l70g2000hse.googlegroups.com>
	<f9fdd5$pqv$1@sea.gmane.org>
Message-ID: <46BB3EB7.8030903@jayloden.com>

Steve Holden wrote:
> This discussion seems to assume that Excel spreadsheets are stored in 
> some canonical form so that two spreads with the same functionality are 
> always identical on disk to the last bit. I very much doubt this is true 
> (consider as an example the file properties that can be set).
> 
> So really you need to define "equality". So far the tests discussed have 
> concentrated on identifying identical files.
> 
> regards
>   Steve

I was wondering myself if the OP was actually interested in binary identical
files, or just duplicated content. If just duplicated content, perhaps this
could be used as a starting point:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440661

and the actual data can be compared

-Jay


From martin at v.loewis.de  Thu Aug 16 12:54:50 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 16 Aug 2007 18:54:50 +0200
Subject: threads, mutual exclusion, and lists
In-Reply-To: <9e95df10708160945h2bcaf978s50a4b390af7e4f5f@mail.gmail.com>
References: <1187206583.255588.57920@e9g2000prf.googlegroups.com>	
	<mailman.2039.1187219345.22759.python-list@python.org>	
	<46C3F78B.9080305@v.loewis.de>
	<9e95df10708160945h2bcaf978s50a4b390af7e4f5f@mail.gmail.com>
Message-ID: <46C4815A.4050403@v.loewis.de>

>> Why do you think they are not?
> 
> Because they aren't. You even mentioned that a few operations that
> aren't atomic. 

OTOH, the OP specifically asked for .append() and .pop(), which are
atomic.

Regards,
Martin


From evan at yelp.com  Wed Aug  8 02:38:28 2007
From: evan at yelp.com (Evan Klitzke)
Date: Tue, 7 Aug 2007 23:38:28 -0700
Subject: Seek the one billionth line in a file containing 3 billion lines.
In-Reply-To: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
Message-ID: <cfb58d850708072338g7d837b0nae71856e156f5a78@mail.gmail.com>

On 8/7/07, Sullivan WxPyQtKinter <sullivanz.pku at gmail.com> wrote:
> I have a huge log file which contains 3,453,299,000 lines with
> different lengths. It is not possible to calculate the absolute
> position of the beginning of the one billionth line. Are there
> efficient way to seek to the beginning of that line in python?
>
> This program:
> for i in range(1000000000):
>       f.readline()
> is absolutely every slow....
>
> Thank you so much for help.

There is no fast way to do this, unless the lines are of fixed length
(in which case you can use f.seek() to move to the correct spot). The
reason is that there is no way to find the position of the billionth
line without scanning the whole file. You should split your logs into
smaller files in the future.

You might be able to do this a very tiny bit faster by using the split
utility and have it split the log file into smaller chunks (split can
split by line amounts), but since that still has to scan the file it
will will be IO bound.

-- 
Evan Klitzke <evan at yelp.com>


From jorgen.maillist at gmail.com  Wed Aug 15 09:35:17 2007
From: jorgen.maillist at gmail.com (Jorgen Bodde)
Date: Wed, 15 Aug 2007 15:35:17 +0200
Subject: Using python for dynamic behavior from C++
Message-ID: <11e49df10708150635y60ba1f72w573185b9e4bcbac0@mail.gmail.com>

Hi all,

I am looking into using Python to introduce dynamic behavior in my
C++, e.g. something like a simulation where objects can interact with
eachother. I know Python can be called from C++, but is it possible to
call a binary compiled Python file / array from C++ ? The reason I ask
is that if my objects call a script every tick to do something, I
would not like to let the python interpreter recompile the same code
over and over again.

Any pointers to how I can do that?

Regards,
- Jorgen


From google at mrabarnett.plus.com  Wed Aug  8 18:44:04 2007
From: google at mrabarnett.plus.com (MRAB)
Date: Wed, 08 Aug 2007 15:44:04 -0700
Subject: Destruction of generator objects
In-Reply-To: <20070808002852.6228ae91@cube.tz.axivion.com>
References: <20070808002852.6228ae91@cube.tz.axivion.com>
Message-ID: <1186613044.494852.306970@q75g2000hsh.googlegroups.com>

On Aug 7, 11:28 pm, Stefan Bellon <sbel... at sbellon.de> wrote:
> Hi all,
>
> I'm generating a binding from Python to C using SWIG. On the C side I
> have iterators over some data structures. On the Python side I
> currently use code like the following:
>
>     def get_data(obj):
>         result = []
>         iter = make_iter(obj)
>         while more(iter):
>             item = next(iter)
>             result.append(item)
>         destroy(iter)
>         return result
>
> Now I'd like to transform it to a generator function like the following
> in order to make it more memory and time efficient:
>
>     def get_data(obj):
>         iter = make_iter(obj)
>         while more(iter):
>             yield next(iter)
>         destroy(iter)
>
> But in the generator case, I have a problem if the generator object is
> not iterated till the StopIteration occurs, but if iteration is stopped
> earlier. In that case, the C iterator's destroy is not called, thus the
> resource is not freed.
>
> Is there a way around this? Can I add some sort of __del__() to the
> generator object so that in case of an early destruction of the
> generator object, the external resource is freed as well?
>
> I'm looking forward to hearing your hints!
>
> --
> Stefan Bellon

Simple! :-)

def get_data(obj):
    iter = make_iter(obj)
    try:
        while more(iter):
            yield next(iter)
    finally:
        destroy(iter)



From dogatemycomputer at gmail.com  Mon Aug 20 15:04:28 2007
From: dogatemycomputer at gmail.com (dogatemycomputer at gmail.com)
Date: Mon, 20 Aug 2007 19:04:28 -0000
Subject: I Need help from all the group participants
In-Reply-To: <fack3a$7kk$1@ss408.t-com.hr>
References: <fac7nj$ci9$1@localhost.localdomain>
	<mailman.0.1187630213.32294.python-list@python.org>
	<fack3a$7kk$1@ss408.t-com.hr>
Message-ID: <1187636668.436474.289220@o80g2000hse.googlegroups.com>


I would be happy to help but I don't have a clear understand of what
the poster needs.




From http  Fri Aug 24 02:31:28 2007
From: http (Paul Rubin)
Date: 23 Aug 2007 23:31:28 -0700
Subject: List Comprehension Question: One to Many Mapping?
References: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
Message-ID: <7x8x81l9z3.fsf@ruckus.brouhaha.com>

beginner <zyzhu2000 at gmail.com> writes:
> For example, if I have x=[ [1,2], [3,4] ]
> 
> What I want is a new list of list that has four sub-lists:
> 
> [[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]]

[[a, map(f,a)] for a in x]


From tooru_honda at fast-mail.org  Tue Aug 28 04:27:12 2007
From: tooru_honda at fast-mail.org (tooru honda)
Date: Tue, 28 Aug 2007 16:27:12 +0800
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
Message-ID: <tooru_honda-DA1E5F.16271128082007@wvnews01.netvigator.com>

Thanks to everyone who replied, (and special thanks to Alex Martelli,) I 
was able to accomplish what I originally asked for: a shuffle() which is 
both fast and without bias.  It is the first time I try to optimize 
python code, and it is definitely a very rewarding experience.


To bring closure to this thread, I will provide below some statistics 
obtained from cProfile:


1. using random.SystemRandom

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)

  4182879   35.154    0.000  211.006    0.000 os.py:724(urandom)
  4182879   31.981    0.000  248.291    0.000 random.py:767(random)
    40578   17.977    0.000  266.300    0.007 random.py:250(shuffle)
  4182879   29.487    0.000   29.487    0.000 {posix.close}
  4182879   99.460    0.000   99.460    0.000 {posix.open}
  4182879   41.794    0.000   41.794    0.000 {posix.read}

2. my original optimization

     8268    0.133    0.000    2.577    0.000 os.py:724(urandom)
  4134322   15.094    0.000   21.606    0.000 baccarat.py:70(get2bytes)
  4131441   17.221    0.000   41.722    0.000 baccarat.py:85(randrange)
    40590    7.059    0.000   48.795    0.001 baccarat.py:112(shuffle)

3. using Alex's generator with string

     4117    0.058    0.000    2.048    0.000 os.py:724(urandom)
  4214795   10.186    0.000   14.880    0.000 baccarat.py:93(rand2)
  4211790    8.883    0.000   23.763    0.000 baccarat.py:106(randrange)
    40739    6.101    0.000   29.878    0.001 baccarat.py:131(shuffle)


4. using Alex's generator with array

     2081    0.029    0.000    1.736    0.001 os.py:724(urandom)
  4161569    1.724    0.000    3.473    0.000 baccarat.py:100(rand2new)
  4158474    8.315    0.000   11.788    0.000 baccarat.py:113(randrange)
    40514    5.726    0.000   17.528    0.000 baccarat.py:138(shuffle)


From steve at holdenweb.com  Thu Aug 23 23:54:56 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 23 Aug 2007 23:54:56 -0400
Subject: Making a file-like object for manipulating a large file
In-Reply-To: <1187920825.457886.7880@q4g2000prc.googlegroups.com>
References: <1187920825.457886.7880@q4g2000prc.googlegroups.com>
Message-ID: <falkr3$27f$1@sea.gmane.org>

Sean Davis wrote:
> This should be a relatively simple problem, but I haven't quite got
> the idea of how to go about it.  I have a VERY large file that I would
> like to load a line at a time, do some manipulations on it, and then
> make it available to as a file-like object for use as input to a
> database module (psycopg2) that wants a file-like object (with read
> and readlines methods).  I could write the manipulated file out to
> disk and then read it back in, but that seems wasteful.  So, it seems
> like I need a buffer, a way to fill the buffer and a way to have read
> and readlines use the buffer.  What I can't do is to load the ENTIRE
> file into a stringio object, as the file is much too large.  Any
> suggestions?
> 
The general approach would be (something like the following untested code):

def filter_lines(f):
     for line in f:
         if to_be_included(line):
             yield line

fil = open("somefile.big.txt", "r")\

filegen = filter_lines(fil)

You can then iterate over the filegen generator, or write your own class 
that makes it file-like. At least the generator manages to throw away 
the unwanted content without buffering the whole file in memory.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
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----------- Thank You for Reading -------------



From wildemar at freakmail.de  Fri Aug 24 13:14:46 2007
From: wildemar at freakmail.de (Wildemar Wildenburger)
Date: Fri, 24 Aug 2007 19:14:46 +0200
Subject: Regular expression use
In-Reply-To: <8c7f10c60708240954h5af2e55bq823ec167e4247e2e@mail.gmail.com>
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
	<8c7f10c60708240954h5af2e55bq823ec167e4247e2e@mail.gmail.com>
Message-ID: <46CF1206.5030204@freakmail.de>

Simon Brunning wrote:
> On 24 Aug 2007 10:58:46 GMT, Nick Maclaren <nmm1 at cus.cam.ac.uk> wrote:
>   
>> For reasons that I won't explain, as they are too complicated
>> and not terribly relevant, I am interested in discovering what
>> people actually use regular expressions for.
>>     
>
> http://xkcd.com/208/
>
>   
That was the one that got me hooked on xkcd. I remember laughing so hard 
at that. A friend and I still quote that one (and others).

/W


From info at thegrantinstitute.com  Sat Aug 25 01:26:20 2007
From: info at thegrantinstitute.com (Anthony Jones)
Date: 24 Aug 2007 22:26:20 -0700
Subject: Professional Grant Proposal Writing Workshop (September 2007: Simon
	Fraser University)
Message-ID: <20070824222620.80437F74DB76B9BF@thegrantinstitute.com>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070824/f9613bf5/attachment.html>

From kyosohma at gmail.com  Sat Aug 18 13:02:55 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Sat, 18 Aug 2007 17:02:55 -0000
Subject: wxPython with directpython
In-Reply-To: <1187448399.382222.177340@22g2000hsm.googlegroups.com>
References: <1187442509.620003.316770@r34g2000hsd.googlegroups.com>
	<1187444103.381907.103240@m37g2000prh.googlegroups.com>
	<1187448399.382222.177340@22g2000hsm.googlegroups.com>
Message-ID: <1187456575.956702.296510@q4g2000prc.googlegroups.com>

On Aug 18, 9:46 am, vedrandeko... at v-programs.com wrote:
> On 18 kol, 15:35, kyoso... at gmail.com wrote:
>
>
>
> > On Aug 18, 8:08 am, vedrandeko... at v-programs.com wrote:
>
> > > Hello,
>
> > > I'am using  DirectPython 0.8, wxPython 2.8.4.2 (ansi) for Python 2.5
> > > and I'm running it on windows XP SP2.
> > > When I run my wx program, and this program run directpython code:
>
> > > (I run it under wx frame)
>
> > > example code:
>
> > > import d3dx
> > > fr=d3dx.Frame(unicode("My frame"))
> > > fr.mainloop()
>
> > > .....this code run some d3dx frame, and when I close this d3dx frame
> > > it close my whole program ( and wx frame).
>
> > > Regards,
> > > Vedran
>
> > You need to post some more code, preferably the function that calls
> > the directx stuff. And how do you catch the close event? It sounds
> > like you've got multiple objects bound to it which causes the entire
> > program to close. You might consider running the directx stuff in a
> > separate thread.
>
> > Mike
>
> Hi,
>
> no,that's all code I've got,I mean it's all code that I run with my
> program for now.
>
> >You might consider running the directx stuff in a separate thread.
>
> How?
>
> Regards,
> Vedran

Check out this link for more information on running stuff in another
thread:
http://wiki.wxpython.org/LongRunningTasks?highlight=%28longrunning%29

Mike



From Jiandong.Ge at gmail.com  Thu Aug  2 12:41:38 2007
From: Jiandong.Ge at gmail.com (JD)
Date: Thu, 02 Aug 2007 16:41:38 -0000
Subject: File access
Message-ID: <1186072898.405831.105670@e16g2000pri.googlegroups.com>

Hi,

What I am trying to do is to run a subprocess on another machine using
subprocess.Popen, this subprocess contuinue writing something into a
file when it is runing.

After submit this subprocess, I tried to open the file and readlines()
in the loop (with a delay) in the loop) when the subprocess was
runing.

The problem is I could not get anything untill the subprocess
finished.

I also tried to run another python programm when the subprocess is
runing, I could get what I want.

Does anyone know why? Thanks!

JD



From pippo at pippopippo.pp  Fri Aug 17 11:50:15 2007
From: pippo at pippopippo.pp (pierbrun@alice.it)
Date: Fri, 17 Aug 2007 17:50:15 +0200
Subject: best GUI library for vector drawing program
In-Reply-To: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
Message-ID: <46c5c3b9$0$36443$4fafbaef@reader5.news.tin.it>

I used wxWidgets for a work like that. I found it quite easy to use and 
I found simple to create a Gui with wxdev which is quite rad.
bye
Pier Paolo


From steve at holdenweb.com  Sun Aug 12 07:08:49 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Aug 2007 07:08:49 -0400
Subject: Web based Reporting tool for Python
In-Reply-To: <f9mno6$tgl$1@sea.gmane.org>
References: <1186460956.945148.162610@k79g2000hse.googlegroups.com>	<mailman.1722.1186522221.22759.python-list@python.org>	<1186547726.383996.291360@d55g2000hsg.googlegroups.com>	<2007080808575016807-jon@turnthepageorg>	<1186891194.582444.222010@r34g2000hsd.googlegroups.com>
	<f9mno6$tgl$1@sea.gmane.org>
Message-ID: <f9mpnt$317$1@sea.gmane.org>

Steve Holden wrote:
> Madhu Alagu wrote:
>> On Aug 8, 4:57 pm, Jon Rosebaugh <j... at turnthepage.org> wrote:
>>> On 2007-08-07 23:35:26 -0500, Madhu Alagu <alma... at gmail.com> said:
>>>
>>>> Thanking so much for all the informations and links.I would like to
>>>> use Mako Templates(www.makotemplates.org).Ilike to use simple and
>>>> python default module...
>>> Mako is an excellent template system, but you'll have a lot of work to
>>> do making it into a reporting system.
>>
>>
>> Any reporting template in python ?
>>
> 
> Dabo (www.dabodev.com) is certainly heading that way, but I am not sure 
> how far it's got yet.
> 
Sorry, Dabo isn't web-based. You could look at Kid, Genshi, Cheetah, ...

Or you could do a Google search for "python web template" and see what 
comes up. There are many good contenders.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From steve at holdenweb.com  Thu Aug 30 14:00:15 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 30 Aug 2007 14:00:15 -0400
Subject: list index()
In-Reply-To: <1188495863.242815.236900@o80g2000hse.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
Message-ID: <fb70jj$mdp$1@sea.gmane.org>

zzbbaadd at aol.com wrote:
>> How could it not be an exception, in the plain English sense of the
>> word? Most certainly you're asking for the index because you want to do
>> something with the index. If the item is not found, you have no index,
>> so that's a special case that must be handled separately. There is no
>> logical difference between handling that special case in an except
>> clause versus handling it with an if-branch.
> 
> In my case of have done os.listdir() on two directories. I want to see
> what files are in directory A that are not in directory B.
> I have used exceptions in other languages and only do so on logic that
> should never happen. In this case it is known that some of the files
> will not be in both lists. I just want to know which ones.
> 
And, as is so often the case, once the *real* problem is stated a more 
elegant solution become available - in this case, using sets.

afiles = set(os.listdir(dira))
bfiles = set(os.listdir(dirb))

for f in (afiles - bfiles):
   print "Not common:", f


You can also generate the files that are in one directory but ot the 
other with

(afiles | bfiles) - (afiles & bfiles)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From vodela.sai at gmail.com  Fri Aug  3 12:47:40 2007
From: vodela.sai at gmail.com (Rohan)
Date: Fri, 03 Aug 2007 16:47:40 -0000
Subject: Email
In-Reply-To: <46b2393f$0$27409$ba4acef3@news.orange.fr>
References: <1186076005.729346.327140@z24g2000prh.googlegroups.com>
	<46b2393f$0$27409$ba4acef3@news.orange.fr>
Message-ID: <1186159660.264082.91830@j4g2000prf.googlegroups.com>

On Aug 2, 1:06 pm, Laurent Pointal <laurent.poin... at wanadoo.fr> wrote:
> Rohan wrote:
> > I was wondering if there could be an arrangement where a file could be
> > attached and send as an email.
> > For ex
> > f = open(add.txt,w)
> > f.write('python')
> > f.close()
>
> > Now I would like to send an email with add.txt as an attachment, is it
> > possible ?
> > some one give me a pointer towards this.
>
> You can use iMailer as an example script to get parts:
>
> http://nojhan.free.fr/article.php3?id_article=22
>
> A+
>
> Laurent.


Laurent the link you gave me is in a language unknown to me if you
have anything that expalains in english, then let me know.
thanks



From david at nospam.spam  Mon Aug 27 00:38:55 2007
From: david at nospam.spam (david)
Date: Mon, 27 Aug 2007 14:38:55 +1000
Subject: wxpython thread exception crash
In-Reply-To: <13ckp4nj0kt6583@corp.supernews.com>
References: <13ckp4nj0kt6583@corp.supernews.com>
Message-ID: <13d4lavcsdo6o77@corp.supernews.com>

  class RedirectText:
      def __init__(self,aWxTextCtrl):
          self.out=aWxTextCtrl

      def write(self,string):
          wx.CallAfter(self.out.WriteText,string) #CallAfter

      def flush(self):
          pass

[david]

[david] wrote:
> What am I doing wrong?
> I'm trying to capture stdErr in a multi-threaded program.
> 
> This code crashes wxPython with
> /Py Assertion Error: C++ assertion "m_count=-1 || m_count=-2" failed/
> 
> What I'm trying to do is redirect stderr and stdout to a wxPython text 
> control.
> In an ideal world, when the worker thread crashes, I should get a stderr 
> message, with no effect on the main thread.
> 
> In an alternate world, I should get an asynchronous exception in the 
> main thread when there is an unhandled exception in the worker thread.
> 
> In the sample below, the program crashes on the following print statement.
> 
> Oddly enough, I do catch the unhandled worker exception in the main 
> thread IF THE WORKER THREAD HAS NO INIT PARAMETER. Note: the init 
> parameter is the only subtle thing in the code.
> 
> Since this is a crash, the exact behaviour will depend on your 
> environment. You may have difficulty seeing stdErr in some environments.
> 
> Python 2.5, wxPython 2.7.2.0, Windows XP.
> (david)
> 
> --------
> import wx
> import sys
> import threading
> 
> class ExceptionThread(threading.Thread):
>     def __init__(self,initvar):
>         threading.Thread.__init__(self);
> 
>     def run(self):
>         raise "ET run"
> 
> 
> class RedirectText:
>     def __init__(self,aWxTextCtrl):
>         self.out=aWxTextCtrl
> 
>     def write(self,string):
>         self.out.WriteText(string)
> 
>     def flush(self):
>         pass
> 
> class Frame(wx.Frame):
>     def __init__(self, image=None, parent=None):
> 
>         wx.Frame.__init__(self, parent)
>         self.text = wx.TextCtrl(self, style=wx.TE_MULTILINE|wx.TE_RICH2)
> 
>     #---- redirection window ----
>         redir=RedirectText(self.text)
>         sys.stdout=redir
>         sys.stderr=redir
> 
> 
> class App(wx.App):
>     def OnInit(self):
>         self.frame=Frame()
>         self.frame.Show()
>         self.Thread=ExceptionThread(1)
>         self.Thread.start();
>         return True
> 
> 
> app = App()
> print 'trigger print failure'
> app.MainLoop()
> 
> 


From steve at holdenweb.com  Sun Aug 19 22:52:15 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 19 Aug 2007 22:52:15 -0400
Subject: question
In-Reply-To: <1187574897.183659.22140@l22g2000prc.googlegroups.com>
References: <1187373737.410546.70930@w3g2000hsg.googlegroups.com>	<fa4pn7$5sh$03$1@news.t-online.com>
	<1187574897.183659.22140@l22g2000prc.googlegroups.com>
Message-ID: <faavkn$9tp$1@sea.gmane.org>

CarpeSkium at gmail.com wrote:
> On Aug 17, 2:34 pm, Peter Otten <__pete... at web.de> wrote:
>>  CarpeSk... at gmail.com wrote:
>>> "I've parsed a webpage into a text file. In doing so, I've kept all
>>> the text I'm interested in, and removed all the text I don't want. My
>>> result is a text file that iscomma-separated. However, the text file
>>> is one, very long, single string. I need to substitute every eighth
>>> (8th)commawith a new line ("\n"). I've tried regular expressions,
>>> but don't know how to make this happen on only every eighthcomma. I'd
>>> post my code, but none of it works. Thanks for the help."
>>>>> text = "aaa," * 20
>>>>> from itertools import cycle, groupby
>>>>> print "\n".join(",".join(g) for k, g in groupby(text.split(","),
>> ...     key=lambda key, c=cycle([True]*8+[False]*8): c.next()))
>> aaa,aaa,aaa,aaa,aaa,aaa,aaa,aaa
>> aaa,aaa,aaa,aaa,aaa,aaa,aaa,aaa
>> aaa,aaa,aaa,aaa,
>>
>> :-)
>>
>> Peter
> 
> Thanks Peter. I'll try that first thing Monday morning when I'm back
> to work. It
> is a totally different approach than what I was trying with regex.
> 
> And Shawn, I didn't post any of my work because the network I work on
> isn't
> connected to the internet. So it didn't seem constructive to re-type
> all of my
> failed code just to satisfy your "standards" of proving that I've been
> trying to
> hack this myself for the past few days. All in all, thanks for your,
> uhhhh,
> constructive comments.
> 
Aah, right, and the USB thumb drive won't be invented for another 20 
years. Damn.

Sorry, been reading too much bash.org. Damn that Michael Foord ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From max at alcyone.com  Sun Aug 12 20:14:19 2007
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 12 Aug 2007 17:14:19 -0700
Subject: Fatest standard way to sum bytes (and their squares)?
In-Reply-To: <yfs643l84fu.fsf@gmail.com>
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
	<yfs643l84fu.fsf@gmail.com>
Message-ID: <ntGdnTiqYbjGPyLbnZ2dnUVZ_gadnZ2d@speakeasy.net>

Alexander Schmolck wrote:

> Is this any faster?
> 
>  ordSum, orsSumSq = (lambda c:c.real,c.imag)(sum(complex(ord(x),ord(x)<<1) 
>                                                  for x in data))

That's pretty clever, but I neglected to mention that I need to 
accumulate the sums as ints/longs to avoid losing precision, so 
converting to floating point isn't an optional.  (The sums are 
normalized by the sizes of the files and expanded to 32 bits in order to 
maximize precision.)

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Experience is the name everyone gives to their mistakes.
    -- Oscar Wilde


From ayaz at dev.null  Thu Aug 23 01:48:10 2007
From: ayaz at dev.null (Ayaz Ahmed Khan)
Date: Thu, 23 Aug 2007 10:48:10 +0500
Subject: introspection and functions
References: <1187819949.515982.15450@r23g2000prd.googlegroups.com>
	<B33zi.4126$Oo.317@newssvr17.news.prodigy.net>
Message-ID: <20070823104810.6054520f.ayaz@dev.null>

"James Stroud" typed:
> py> def doit(a, b, c, x=14):
> ...   pass
> ...
> py> doit.func_code.co_argcount
> 4
> py> doit.func_code.co_varnames
> ('a', 'b', 'c', 'x')
> py> doit.func_defaults
> (14,)

Neat.

-- 
Ayaz Ahmed Khan

I have not yet begun to byte!


From martin at v.loewis.de  Thu Aug 16 13:21:12 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 16 Aug 2007 19:21:12 +0200
Subject: ctypes and C99 complex numbers
In-Reply-To: <mailman.2063.1187278793.22759.python-list@python.org>
References: <1187266067.24753.12.camel@wheeler.hlphys.uni-linz.ac.at>
	<mailman.2063.1187278793.22759.python-list@python.org>
Message-ID: <46c48789$0$9301$9b622d9e@news.freenet.de>

Thomas Heller schrieb:
> Eugen Wintersberger schrieb:
>> Hi there
>>  I want to use ctypes in connection with C functions that use complex
>> datatypes defined in the C99 standard. Does someone know a simple way
>> how to implement this? Are there any plans to integrate the C99 complex
>> data types in the ctypes module?
> 
> I have investigated the complex data types a bit and came to the conclusion
> that libffi (which ctypes is based upon) would have to be extended to
> support these complex types.  

I think that depends on what kind of support you want to provide. For
passing _Complex values as parameters or receiving them as results,
it's certainly necessary to have libffi support.

OTOH, if you only want to support _Complex as the field type of a
struct or an array, you can do so without libffi support. To write
a field at address p with the values r and i, do

  *(double complex*)p = r * i*I;

To fetch the real and imaginary part of a field at address p, do

  creal(*(double complex*)p)
  cimag(*(double complex*)p)

Likewise for float complex values (and long double complex, if you
want to support that).

Whether such a limited version would be of any use (e.g. to the OP),
I don't know.

Regards,
Martin


From afriere at yahoo.co.uk  Tue Aug 21 03:54:53 2007
From: afriere at yahoo.co.uk (Asun Friere)
Date: Tue, 21 Aug 2007 00:54:53 -0700
Subject: Newbee Question
In-Reply-To: <1187682705.769160.68850@q3g2000prf.googlegroups.com>
References: <mailman.15.1187620149.26576.python-list@python.org>
	<1187682119.353756.278840@i13g2000prf.googlegroups.com>
	<1187682705.769160.68850@q3g2000prf.googlegroups.com>
Message-ID: <1187682893.684750.118630@e9g2000prf.googlegroups.com>

On Aug 21, 5:51 pm, Asun Friere <afri... at yahoo.co.uk> wrote:
> On Aug 21, 5:41 pm, Asun Friere <afri... at yahoo.co.uk> wrote:> over = Decimal('1.40)
>
> oops, that should of course be:
> over = Decimal('1.40')

oh boy ... and it should also be
normal = Decimal('0.40')

I really need to test before posting ...



From thomas at jollans.com  Thu Aug 16 19:20:02 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Fri, 17 Aug 2007 01:20:02 +0200
Subject: Pass by reference or by value?
In-Reply-To: <496954360708161402x58faba47x7a6eae6e68f81d4@mail.gmail.com>
References: <496954360708161402x58faba47x7a6eae6e68f81d4@mail.gmail.com>
Message-ID: <200708170120.07645.thomas@jollans.com>

On Thursday 16 August 2007, Robert Dailey wrote:
> Hi,
>
> I previously created a topic named "Pass by reference or by value" where I
> inquired on how python's function parameters work. I received a lot of nice
> responses, however I'm still confused on the topic. Note that I come from a
> C++ background to Python, so any comparisons to C++ would be very helpful.

Very short answer:

Think of normal objects as always-pointers. There are no references. param = 5 
sets the local variable "param" (be that of imaginary type int* or int, I 
don't care) to whatever 5 is. This does not call an operator=, this plain 
overwrites the variable.

If you want to change arguments in that way, you can use a list as an ugly 
hack:

def foo(param):
	param[0] = 5
	print param[0]

a = [4]

foo(a)

yeah, I said ugly. That hack makes sure that a method of the passed object is 
called instead of of the local namespace dict. (please note that I'm throwing 
around abstract concepts without caring about an implementation).

-- 
      Regards,                       Thomas Jollans
GPG key: 0xF421434B may be found on various keyservers, eg pgp.mit.edu
Hacker key <http://hackerkey.com/>:
v4sw6+8Yhw4/5ln3pr5Ock2ma2u7Lw2Nl7Di2e2t3/4TMb6HOPTen5/6g5OPa1XsMr9p-7/-6
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From steve at holdenweb.com  Fri Aug 31 11:02:35 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 11:02:35 -0400
Subject: MySQLdb ImportError
In-Reply-To: <1188546939.086855.204670@q5g2000prf.googlegroups.com>
References: <1188546939.086855.204670@q5g2000prf.googlegroups.com>
Message-ID: <fb9aid$e3l$2@sea.gmane.org>

Sjoerd wrote:
> Hello!
> 
> When I try to import the MySQLdb lib python generates an error:
> 
> Traceback (most recent call last):
>   File "<pyshell#0>", line 1, in <module>
>     import MySQLdb
>   File "C:\Python25\lib\site-packages\MySQLdb\__init__.py", line 19,
> in <module>
>     import _mysql
> ImportError: DLL load failed with error code 193
> 
> This is on a AMD64 bit machine, when I import it on a 32 bit machine
> it works fine.
> Is there anyway to fix this? Is there a build for AMD64 bit machines
> or is there simply no way
> that I can get MySQLdb working on it?
> 
> Thanks in advance,
> Sjoerd
> 
I'm not aware of a current build for that architecture (and your 
assumption that the load fails because of the architecture mismatch is 
correct).

It is possible to build the module yourself if it's important enough. I 
remember doing this some time ago with the Microsoft free compiler kit, 
for example.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From aleax at mac.com  Sun Aug 19 01:38:56 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 18 Aug 2007 22:38:56 -0700
Subject: Understanding closures
References: <1187499818.125192.12930@m37g2000prh.googlegroups.com>
Message-ID: <1i32c61.3hu08w15buuxtN%aleax@mac.com>

Ramashish Baranwal <ramashish.lists at gmail.com> wrote:

> Hi,
> 
> I want to use variables passed to a function in an inner defined
> function. Something like-
> 
> def fun1(method=None):
>     def fun2():
>         if not method: method = 'GET'
>         print '%s: this is fun2' % method
>         return
>     fun2()
> 
> fun1()
> 
> However I get this error-
> UnboundLocalError: local variable 'method' referenced before
> assignment
> 
> This however works fine.
> 
> def fun1(method=None):
>     if not method: method = 'GET'
>     def fun2():
>         print '%s: this is fun2' % method
>         return
>     fun2()
> 
> fun1()
> 
> Is there a simple way I can pass on the variables passed to the outer
> function to the inner one without having to use or refer them in the
> outer function?

Sure, just don't ASSIGN TO those names in the inner function.  Any name
ASSIGNED TO in a given function is local to that specific function (save
for global statements, which bypass variable of containing functions
anyway).


Alex


From Brian.McCann at viziant.net  Mon Aug 20 15:02:59 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Mon, 20 Aug 2007 15:02:59 -0400
Subject: reading a line in file
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx><2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com><B81734159.43.61526.2@mxextra>
	<9afea2ac0708201159t4602fe3fpfb738a22f063f37@mail.gmail.com>
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE2B5@efmailx>

 
Hi Tim,
The sample data is in file build.number

contents of file build.number:
 
 #Build Number for ANT. Do not edit!
 #Mon Aug 20 04:04:51 EDT 2007
build.number=1
 
Thanks,
Brian
 

________________________________

From: tdwdotnet at gmail.com on behalf of Tim Williams
Sent: Mon 8/20/2007 2:59 PM
To: Brian McCann
Cc: python-list at python.org
Subject: Re: reading a line in file



On 20/08/07, Brian McCann <Brian.McCann at viziant.net> wrote:
>
> Hi,
>
> I can read in the whole file build.number which has the following lines
> how do I just capture the value of build.number and assign it to a variable
> Thanks,
> Brian
>
> contents of file build.number:
> #Build Number for ANT. Do not edit!
> #Mon Aug 20 04:04:51 EDT 2007
> build.number=1
> buildinfo.py
> ##################################
> #!/usr/bin/python
> import string
> import os
> import sys
> import time
> import errno
> import shutil
> buildinfo = "build.number"
> input = open(buildinfo, 'r')
> for line in input:
>         print line
> #########################################
>
> command line when script is run
> $ buildinfo.py
> #Build Number for ANT. Do not edit!
>
> #Mon Aug 20 04:04:51 EDT 2007
> build.number=1
>
>

This is preferred nowadays

for line in open(buildinfo):
        print line

Without a sample of the data, no-one can help you further.   If this
is homework, you should say so, people will give you guidance :)


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From deets at nospam.web.de  Wed Aug 22 03:19:13 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 22 Aug 2007 09:19:13 +0200
Subject: redirect or cover .bat log
In-Reply-To: <1187764689.836375.212730@z24g2000prh.googlegroups.com>
References: <1187764689.836375.212730@z24g2000prh.googlegroups.com>
Message-ID: <5j26bvF3s7lbpU2@mid.uni-berlin.de>

vedrandekovic at v-programs.com schrieb:
> Hello,
> 
> e.g I need run my my_scripts_setup.bat that contain:
> 
> python myscript_setup.py py2exe
> 
> 
> Can I cover or redirect log of that process into my wx program?
> I'am using Windows XP SP2, and Python 2.5.

Who's running the bat, and who's running the wx program?

Diez


From rdm at rcblue.com  Sun Aug 12 13:22:51 2007
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 12 Aug 2007 10:22:51 -0700
Subject: Puzzled by "is"
In-Reply-To: <f9neac$8aq$1@sea.gmane.org>
References: <20070809194105.39BD11E400A@bag.python.org>
	<f9frbl$dps$1@sea.gmane.org>
	<mailman.1814.1186692638.22759.python-list@python.org>
	<87zm1042f0.fsf@benfinney.id.au>
	<mailman.1839.1186768658.22759.python-list@python.org>
	<87ir7l5bv4.fsf@benfinney.id.au>
	<d71c7ed60708120626y6d9a9edcnf007a5273de125cc@mail.gmail.com>
	<f9n8lb$cg9$1@sea.gmane.org>
	<20070812163657.2F8F41E400B@bag.python.org>
	<f9neac$8aq$1@sea.gmane.org>
Message-ID: <20070812172301.009F51E401C@bag.python.org>

At 09:59 AM 8/12/2007, Steve Holden wrote:
>Dick Moores wrote:
> > At 08:23 AM 8/12/2007, Steve Holden wrote:
> >> Dick Moores wrote:
> >>> So would a programmer EVER use "is" in a script?
> >> Sure. For example, the canonical test for None uses
> >>
> >>      x is None
> >>
> >> because there is only ever one instance of type Nonetype, so it's the
> >> fastest test. Generally speaking you use "is" to test for identity (do
> >> these two expressions reference the same object) rather than equality
> >> (do these two expressions evaluate to equivalent objects).
> >
> > Off the top of your head, could you or others give me as many
> > examples as you can think of?
> >
>Occasionally it's necessary to test for a specific type (though in
>Python this is usually bad practice). Since types are also singletons
>the best way to do this is (e.g.):
>
>      type(x) is type([]) # test specifically for a list
>
>If you want to know whether you have been told to write to standard
>output, one possible test is
>
>      if f is not sys.stdout
>
>Similarly, of course, you can test for the other standard IO channels.
>
>The imputil module contains the test
>
>      if importer is not self
>
>to determine whether a reload() should be performed in the context of
>the current package.
>
>When you need to establish a specific sentinel value that can never be
>provided by an outside caller it's normal to create an instance of
>object (the simplest possible thing you can create in a Python program)
>and test for that instance, as in
>
>      sentinel = object()
>          ...
>      if value is sentinel:
>
>You can test whether a class is new-style as opposed to old-style, which
>can help to unify old-style and new-style objects:
>
>class MetaProperty(type):
>      def __new__(cls, name, bases, dct):
>          if bases[0] is object: # allow us to create class Property
>              return type.__new__(cls, name, bases, dct)
>          return property(dct.get('get'), dct.get('set'),
>                  dct.get('delete'), dct.get('__doc__'))
>
>      def __init__(cls, name, bases, dct):
>          if bases[0] is object:
>              return type.__init__(cls, name, bases, dct)
>
>
>That gets you started ...

Sure does. Thanks very much, Steve.

Dick




From steve at holdenweb.com  Fri Aug 31 15:28:08 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 15:28:08 -0400
Subject: strings (dollar.cents) into floats
In-Reply-To: <1188586725.667740.255700@o80g2000hse.googlegroups.com>
References: <mailman.140.1188483282.28954.python-list@python.org>	<877incd20i.fsf@benfinney.id.au>	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>	<1188575044.874256.42960@50g2000hsm.googlegroups.com>	<fb9eas$tnc$1@sea.gmane.org>	<mailman.218.1188577696.28954.python-list@python.org>	<46d84a47$0$1346$834e42db@reader.greatnowhere.com>
	<1188586725.667740.255700@o80g2000hse.googlegroups.com>
Message-ID: <fb9q4a$55a$2@sea.gmane.org>

MRAB wrote:
> On Aug 31, 5:39 pm, David H Wild <dhw... at talktalk.net> wrote:
>> In article <mailman.218.1188577696.28954.python-l... at python.org>,
>>    Chris Mellon <arka... at gmail.com> wrote:
>>
>>> I believe that to the degree that "real" accounting was done in those
>>> currencies it did in fact use non-decimal bases. Just as people don't
>>> use decimal time values (except us crazy computer folk), you're write
>>> 1 pound 4 shillings, not 1.333... pounds.
>> When I worked on the British Railways National Payroll system, about 35
>> years ago, we, in common with many large users, wrote our system to deal
>> with integer amounts of pennies, and converted to pounds, shillings and
>> pence in the output part of the system.
>>
> So you never handled halfpennies?
> 
Nobody was paid to the ha'penny. You could spend them in the shops, but 
payroll systems didn't use them. I am happy to say that I didn't become 
involved in financial programming until after decimalization (February 
1971, IIRC - I was in Sweden at the time).

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From raul at cgb.cl  Mon Aug 27 16:54:01 2007
From: raul at cgb.cl (Raul Araya)
Date: Mon, 27 Aug 2007 16:54:01 -0400
Subject: include folder
Message-ID: <46D339E9.1000200@cgb.cl>

Dear Python users and developers:

My trouble is as follows: I'm putting back on line an old pc-linux cluster.
Today while trying to install a python based program I got an error 
regarding the Python.h file that should be in the /include/Phyton2.3 
folder. So I went looking for the file but it wasn't there, I mean the 
whole folder /Phyton2.3 inside the /usr/include directory was not there. 
I am not te administrator of that cluster that has been off for at least 
2 years, so I really don't know what to do. Please help.
My Linux version is: Debian GNU-Linux
My Python version is: 2.3

Many thanks
Ra?l Araya
Faculty of sciences
Universidad de Chile
Santiago Chile



From laurent.pointal at limsi.fr  Tue Aug 28 06:38:32 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 28 Aug 2007 12:38:32 +0200
Subject: SCF released to GPL
In-Reply-To: <zHLAi.102$7P7.54@newssvr19.news.prodigy.net>
References: <ZBnAi.21498$eY.43@newssvr13.news.prodigy.net>
	<46d29a6c$0$27404$ba4acef3@news.orange.fr>
	<zHLAi.102$7P7.54@newssvr19.news.prodigy.net>
Message-ID: <fb0tv8$njd$1@news2.u-psud.fr>

hg a ?crit :
> 2) I'm desperately searching for the French NG from my client but cannot 
> find it ... any clue ? Maybe you can pass the message ?

Contact Michel Claveau ( enleverlesX.XmcX at XmclaveauX.com ) for a 
solution via his Usenet relay.


A+

Laurent.


From brotherjenos at gmail.com  Wed Aug  1 18:55:51 2007
From: brotherjenos at gmail.com (Walker Lindley)
Date: Wed, 1 Aug 2007 15:55:51 -0700
Subject: sending very large packets over the network
Message-ID: <9c8d48280708011555l5d1d439fu3c5fbcc61dc41f07@mail.gmail.com>

OK, I'm back with another networking question. I'm trying to seend large
amounts of information over TCP (the length of data being given to send() is
on the order of 16000 characters in length). Unfortunately on the receiving
end, the packets appear to be truncated. So I wrote some code that
continuously tries to send bigger and bigger packets until it fails and
noticed that it never fails at the same length. I'm not even sure these two
things are related, but is there some undocumented (or documented and I
missed it) maximum size for data you can pass to send()?

the sample code is as follows
#server
import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(("", 2000))
s.listen(0)
sock, addrinfo = s.accept()
for i in range(2 ** 16):
 length = int(sock.recv(16))
 print "excpecting data of length:", length
 data = sock.recv(length)
 print "received data of length:", len(data)
 print
s.close()
sock.close()

#client
import socket
import time

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(("", 2001))
s.connect(("localhost", 2000))
for i in range(2 ** 16):
 packet = "h" * i
 s.send("%16d" % len(packet))
 print "attempting to send data of length:", len(packet)
 tmp = s.send(packet)
 print "actually sent data of length:", tmp
 print
 time.sleep(.001)
s.close()

i just put them in different files and ran them from the command line. Any
help or suggestions would be greatly appreciated. Thanks.


-Walker

-- 
This e-mail is licensed under the Creative Commons
Attribution-NoDerivs 2.5License. To view a copy of this license, visit
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From mcl.office at googlemail.com  Sun Aug 19 16:29:33 2007
From: mcl.office at googlemail.com (mosscliffe)
Date: Sun, 19 Aug 2007 13:29:33 -0700
Subject: Symbolic Link
In-Reply-To: <iwWxi.28394$RX.20505@newssvr11.news.prodigy.net>
References: <1187475296.173269.263080@k79g2000hse.googlegroups.com>
	<iwWxi.28394$RX.20505@newssvr11.news.prodigy.net>
Message-ID: <1187555373.202634.163160@57g2000hsv.googlegroups.com>

On 19 Aug, 13:16, samwyse <dejan... at email.com> wrote:
> mosscliffewrote:
> > I am trying to create a link to a file, which I can then use in an
> > HTML page.
>
> > The system is Linux on a hosted web service, running python 2.3.
> > Other than that I have no knowledge of the system.
>
> > The link is created OK, but when I try to use it as filename for the
> > IMG TAG, it does not get displayed.  The page source of the created
> > page is pointing to the link as temp/test1.jpg
>
> What are you trying to do that you can't use the original file instead
> of creating a link?  There might be a way to side-step the entire problem.

The source file is in an area which python can see, but not the
browser.  I am trying to make a link in a browser friendly area so I
can use it to display an image file.

Thanks

Richard



From bbxx789_05ss at yahoo.com  Mon Aug  6 12:03:45 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 06 Aug 2007 09:03:45 -0700
Subject: udp, datagram sockets
Message-ID: <1186416225.769753.307110@o61g2000hsh.googlegroups.com>

I'm trying to understand datagrams.  My client program sends a message
to the server, and then the server infinitely loops over the recv() to
make sure all the data was received.  I'm trying to use an * to signal
the end of the message, so that the server can break out of the
infinite while loop used to check the recv().  However, my server
repeatedly outputs the client message over and over again.  Can anyone
tell me why?

When I start the server, I get the following debug output as
expected:

---------
debug: start outer while loop
#this infinite while loop endlessly listens for messages from the
client

debug: recv while loop
#this infinite while loop checks to make sure the whole message was
received
-----------

and then the recv() blocks and waits for data to be sent by the
client. But when I start the client, the server repeatedly outputs the
client message over and over again.   My expectation was that after
processing the message from the client, the server would block the
next time it executed the recv() statement and wait for more data from
the client.

client:
----------
import socket

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

message = "hello*" #asterisk to delimit end of message
msg_size = len(message)
total_sent = 0

print "debug:", total_sent, msg_size

while total_sent < msg_size:
    size_sent = s.sendto(message[total_sent:], ("localhost", 7777) )
    total_sent += size_sent

    print "debug:", total_sent, msg_size

print 'debug: while loop ended'
s.close()
-----------

Here's the client output:

-------------
debug: 0 6
debug: 6 6
debug: while loop ended
---------------


server:
------------------
import socket
import sys

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.bind(("", 7777))

try:
    while True:  #This loop listens endlessly for messages.
        print "debug: start outer while loop"

        #Receive messages from client:
        my_list = []
        while True:  #This loop checks to see if the whole message was
received.
            print "debug: recv while loop"

            data  = s.recv(1024)
            my_list.append(data)

            if data.rfind("*"):
                message = "".join(my_list)
                print "Received message:\n%s" % message[:-1]
                break


        #Send messages back to client:
        total_sent = 0
        while total_sent < len(message):
            print "debug: send while loop"

            size_sent = s.sendto(message[total_sent:], ("localhost",
7777) )
            total_sent += size_sent

            print "debug:", total_sent, len(message)

finally:
    s.close()
--------------------------

Here's the server output:

---------------
debug: start outer while loop
debug: recv while loop
Received message:
hello
debug: send while loop
debug: 6 6
debug: start outer while loop
debug: recv while loop
Received message:
hello
debug: send while loop
debug: 6 6
....
....
....
------------------



From horpner at yahoo.com  Tue Aug 14 10:50:08 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 14 Aug 2007 14:50:08 GMT
Subject: Module imports during object instantiation
References: <4c3vo4-u7k.ln1@learner.hq.netapp.com> <f9pcuj$6n4$1@sea.gmane.org>
	<mailman.1931.1187030415.22759.python-list@python.org>
	<46c16ec9$0$405$426a34cc@news.free.fr>
	<mailman.1956.1187091452.22759.python-list@python.org>
	<slrnfc36p9.21o.horpner@FIAD06.norwich.edu>
	<mailman.1965.1187101832.22759.python-list@python.org>
Message-ID: <slrnfc3gg4.1l4.horpner@FIAD06.norwich.edu>

On 2007-08-14, Ritesh Raj Sarraf <rrs at researchut.com> wrote:
> Neil Cerutti wrote:
>
>> If you want an import inside an __init__ to run, you must call
>> the __init__ function that contains it.
>
> Doesn't __init__ get called automatically ?

It gets called automatically when you construct an instance of
the class in which it's defined.

> I thought __init__ was required to be called explicitly only
> when you were doing inheritance and wanted to pass separate
> values to the base class.

You don't have to call it explicitly to get it to run.

-- 
Neil Cerutti
Customers who consider our waitresses uncivil ought to see the manager --sign
at New York restaurant


From martin at v.loewis.de  Wed Aug 22 16:35:59 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 22 Aug 2007 22:35:59 +0200
Subject: MsiLib
In-Reply-To: <mailman.136.1187813962.32294.python-list@python.org>
References: <mailman.136.1187813962.32294.python-list@python.org>
Message-ID: <46cc9e2f$0$1456$9b622d9e@news.freenet.de>

Charlie schrieb:
> Thanks for pointing that out. It solved the one problem and along came
> another. Now I get the following error when I try running it. Thanks for
> the help.
> 
> Traceback (most recent call last):
>   File "msi.py", line 7, in <module>
>     record = view.Fetch()
> _msi.MSIError: function failed

Ah. You need to call view.Execute() first. See

http://msdn2.microsoft.com/en-us/library/aa370514.aspx

Regards,
Martin


From a.schmolck at gmail.com  Wed Aug  1 12:01:39 2007
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: Wed, 01 Aug 2007 17:01:39 +0100
Subject: What is the "functional" way of doing this?
References: <1185835690.530367.66600@m37g2000prh.googlegroups.com>
Message-ID: <yfsabtbi6qk.fsf@gmail.com>

beginner <zyzhu2000 at gmail.com> writes:

> Hi,
>
> If I have a number n and want to generate a list based on like the
> following:
>
> def f(n):
>      l=[]
>      while n>0:
>          l.append(n%26)
>          n /=26
>     return l
>
> I am wondering what is the 'functional' way to do the same.

This is very 'functional' (and also quite concise):

f = compose(list,partial(unfold, divmod(_,26)))

The definitions of compose, unfold, and _ are left as excercises (of
increasing difficulty) for the reader.

'as


From steven.bethard at gmail.com  Sun Aug 12 18:35:05 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 12 Aug 2007 16:35:05 -0600
Subject: A dumb question about a class
In-Reply-To: <mailman.1888.1186957809.22759.python-list@python.org>
References: <mailman.1887.1186955369.22759.python-list@python.org>	<TqSdnWYzVdWvGCLbnZ2dnUVZ_saknZ2d@comcast.com>
	<mailman.1888.1186957809.22759.python-list@python.org>
Message-ID: <euCdnYM4sfSHFiLbnZ2dnUVZ_gadnZ2d@comcast.com>

Dick Moores wrote:
> At 03:09 PM 8/12/2007, Steven Bethard wrote:
> 
>> Here's how I'd write the recipe::
>>
>>      import itertools
>>
>>      def iter_primes():
>>          # an iterator of all numbers between 2 and +infinity
>>          numbers = itertools.count(2)
>>
>>          # generate primes forever
>>          while True:
>>
>>              # get the first number from the iterator (always a prime)
>>              prime = numbers.next()
>>              yield prime
>>
>>              # remove all numbers from the (infinite) iterator that are
>>              # divisible by the prime we just generated
>>              numbers = itertools.ifilter(prime.__rmod__, numbers)
>>
>>
>>      class PrimeList(object):
>>          def __init__(self):
>>              # infinite iterator of primes
>>              self._prime_iter = iter_primes()
>>
>>              # the last prime we've seen
>>              self._last_prime = None
>>
>>              # all primes seen so far
>>              self._prime_set = set()
>>
>>              # add the first prime (so that _last_prime is set)
>>              self._add_prime()
>>
>>          def __contains__(self, n):
>>              # add primes to the list until we exceed n
>>              while n > self._last_prime:
>>                  self._add_prime()
>>
>>              # return True if n is one of our primes
>>              return n in self._prime_set
>>
>>          def _add_prime(self):
>>              # take a prime off the iterator and update the prime set
>>              self._last_prime = self._prime_iter.next()
>>              self._prime_set.add(self._last_prime)
> 
> I'm afraid my next question is "How do I run this"?


The same way I showed at the top (which you snipped in your reply)::

     >>> plist = PrimeList()
     >>> 1 in plist
     False
     >>> 2 in plist
     True
     >>> 22 in plist
     False
     >>> 23 in plist
     True
     >>> 782 in plist
     False
     >>> 787 in plist
     True

The first line, ``plist = PrimeList()`` creates a PrimeList object and 
names it ``plist``.  You can then check whether a prime is in that 
PrimeList object much like you might check a normal ``list`` or ``set`` 
object -- using the ``in`` operator as above.

Note that if you just want to iterate over all the primes, there's no 
need for the class at all.  Simply write::

     for prime in iter_primes():
         ...

HTH,

STeVe


From simon at brunningonline.net  Fri Aug 31 11:00:16 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 31 Aug 2007 16:00:16 +0100
Subject: Question involving a Python app...
In-Reply-To: <1188571968.529938.55770@i38g2000prf.googlegroups.com>
References: <1188571968.529938.55770@i38g2000prf.googlegroups.com>
Message-ID: <8c7f10c60708310800o864e28cif5b0bbe0e8e10d41@mail.gmail.com>

On 8/31/07, sberry <sean at buildingonline.com> wrote:
> So, how do I create an executable (on Windows)
> to install the program so it will run without the aforementioned
> framework being installed?

Check out py2exe.

-- 
Cheers,
Simon B.
simon at brunningonline.net


From stargaming at gmail.com  Wed Aug  1 02:10:54 2007
From: stargaming at gmail.com (Stargaming)
Date: 01 Aug 2007 06:10:54 GMT
Subject: Python end of file marker similar to perl's __END__
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
	<1185947061.985093.306840@22g2000hsm.googlegroups.com>
Message-ID: <46b023ee$0$6528$9b622d9e@news.freenet.de>

On Wed, 01 Aug 2007 05:44:21 +0000, Michele Simionato wrote:

> On Aug 1, 5:53 am, beginner <zyzhu2... at gmail.com> wrote:
>> Hi All,
>>
>> This is just a very simple question about a python trick.
>>
>> In perl, I can write __END__ in a file and the perl interpreter will
>> ignore everything below that line. This is very handy when testing my
>> program. Does python have something similar?
> 
> I wished from something like that. What you can do at the moment, is to
> comment or triple quote the code you don't want to run.

Or, if in a function body, you could insert a `return` statement. When in 
top-level code, invoking `sys.exit` (or exit/quit) can do the trick. A 
``raise Exception`` might help, too, but could be kinda distracting 
sometimes.

So, there is no general purpose solution as perl has it (I guess that 
__END__ works everywhere at least), rather different solutions for 
different cases.


From cjw at sympatico.ca  Thu Aug 16 17:33:43 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Thu, 16 Aug 2007 17:33:43 -0400
Subject: sub-classing the types in the builtin module datetime
In-Reply-To: <1187294329.082872.230800@l22g2000prc.googlegroups.com>
References: <mailman.2043.1187225689.22759.python-list@python.org>
	<1187294329.082872.230800@l22g2000prc.googlegroups.com>
Message-ID: <46C4C2B7.6000701@sympatico.ca>

attn.steven.kuo at gmail.com wrote:
> On Aug 15, 5:54 pm, "Colin J. Williams" <c... at sympatico.ca> wrote:
>> I posted this about 5 hours ago, but it seems to have gone astray.
> 
> 
> (snipped)
> 
>>  >
>>  >> I wish to sub-class (if that's the right word) datetime and to use a
>>  >> different signature for the constructor.
>>  >>
>>  >> The second part has gone smoothly, but it is difficult to access the
>>  >> type's methods from the sub-class instance.
>>  >>
>>  >> I'm beginning to wonder whether it might might be simpler to write my
>>  >> own Date class.
>>  >>
>>  >> Does anyone have any comments please?
>>  >>
>>  >> Colin W.
> 
> (snipped)
> 
> 
>> Yes, I should have posted an example, but I thought that others might
>> have experienced the problem.
>>
>> It is illustrated at the bottom of this script:
>>
>> # subClassing.py
>>
>> import datetime
>> import new
>> import sys
>> import types
>>
>> class Date(datetime.datetime):
>>    ''' Date(s) -> a date object.__class__
>>          where s is an 8 digit string'''
>>
>>    def __new__(cls, YYmmdd):
>>      ''' YYmmdd is a string, in the form yyyymmdd i.e. 8 digits.
>>      or            a 3-tuple of integers in the form (y, m, d)
>>      or            a 6-tuple of integers in the form (y, m, d, h, m,
>> s) '''
> 
> 
> (snipped)
> 
>> a= datetime.datetime(2007, 7, 31)
>> d= Date('20070731')
>> tm= datetime.time(1, 2)
>> try:
>>    print a.today()
>> #  print d.today()        # grief
>>    print a.now()
>> #  print d.now()          # grief
>>    print a.combine(a, tm)  # OK, but  why not a.combine(tm)?
>> #  e= d.combine(d, tm)    # grief
>>    print a.utcnow()
>> #  print d.utcnow()       # grief
>>    print a.ctime()
>>    print d.ctime()
>> except:
>>    print 'Grief'
>>    print sys.exc_info()
>>
>> Colin W.
> 
> 
> 
> 
> 
> This problem arises when you change the function signature of __new__.
> I'm a little unclear as to why but it seems for the classmethods
> (thosed marked with the METH_CLASS flag in the C source code), you
> need to arrange to bypass the normal method resolution (I used a
> metaclass
> to do this):
> 
> 
> 
> import datetime
> 
> class Date(datetime.datetime):
>     pass
> 
> class FixClassMethods(type):
>     def __init__(cls, classname, bases, classdict):
>         # add strptime if using Python 2.5
>         flagged_as_meth_class = ('today', 'now', 'fromtimestamp',
>         'fromordinal', 'now', 'utcnow', 'utcfromtimestamp', 'combine')
>         for meth in flagged_as_meth_class:
>             setattr(cls, meth, getattr(datetime.datetime, meth))
> 
> class DateChangesNewSignature(datetime.datetime):
>     @staticmethod
>     def str2ymd(strval):
>         yyyy, mm, dd = (int(substr) for substr in (strval[:4],
>             strval[4:6], strval[6:]))
>         return yyyy, mm, dd
> 
>     def __new__(cls, strval):
>         yyyy, mm, dd = DateChangesNewSignature.str2ymd(strval)
>         return super(DateChangesNewSignature,cls).__new__(cls, yyyy,
> mm,
>                 dd)
>     def __init__(self, strval):
>         yyyy, mm, dd = DateChangesNewSignature.str2ymd(strval)
>         super(DateChangesNewSignature, self).__init__(yyyy, mm,
>                 dd)
> 
> class DLast(DateChangesNewSignature):
>     __metaclass__ = FixClassMethods
> 
> f = Date(2007,07,07)
> print f
> print f.today()
> 
> f2 = DateChangesNewSignature("20070707")
> print f2
> try:
>     print f2.today()
> except TypeError, e:
>     print str(e)
>     print "Uh?"
> 
> 
> f3 = DLast("20070707")
> print f3
> print f3.today()
> 
> 
> I get:
> 
> 2007-07-07 00:00:00
> 2007-08-16 12:57:41.480679
> 2007-07-07 00:00:00
> __new__() takes exactly 2 arguments (9 given)
> Uh?
> 2007-07-07 00:00:00
> 2007-08-16 12:57:41.483104
> 
> 
> --
> Hope this helps,
> Steven
> 
Steven,

Many thanks, I'll try this out tomorrow.

Colin W



From pyth0nc0d3r at gmail.com  Wed Aug 22 23:12:23 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Wed, 22 Aug 2007 22:12:23 -0500
Subject: How do I get the current path of my python file that is currently
	running.
Message-ID: <eb79828c0708222012o1dec7c82k24c4a4c9015b6df7@mail.gmail.com>

Say I start i click on a python file on my desktop, how could I return the
path of the current python file thats running?
-------------- next part --------------
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From jf.pieronne at laposte.net  Tue Aug  7 07:37:35 2007
From: jf.pieronne at laposte.net (=?ISO-8859-15?Q?Jean-Fran=E7ois_Pi=E9ronne?=)
Date: Tue, 07 Aug 2007 13:37:35 +0200
Subject: seeking tinter module
In-Reply-To: <f99jr9$33f$01$1@news.t-online.com>
References: <46b849cf$0$21841$426a74cc@news.free.fr>
	<f99jr9$33f$01$1@news.t-online.com>
Message-ID: <46b85980$0$25013$426a74cc@news.free.fr>

Peter Otten wrote:
> Jean-Fran?ois Pi?ronne wrote:
> 
>> I'm looking for a module name tinter (not tkinter...)
>>
>> from http://www.vex.net/parnassus/apyllo.py?i=97497223
>> status: Dead and Gone
>>
>> Google return no location to download it, only a few
>> articles mentionned it, for example:
>> http://www.ibm.com/developerworks/linux/library/l-python6.html
>>
>>
>> Does someone has still a copy of this module?
> 
> http://www.google.com/codesearch?q=lang%3Apython+file%3Atinter.py&hl=de&btnG=Code+suchen
> 
> gives one hit.
> 

Thanks


From penten at gmail.com  Tue Aug 28 09:01:07 2007
From: penten at gmail.com (penten at gmail.com)
Date: Tue, 28 Aug 2007 13:01:07 -0000
Subject: Embedding the python interpreter
In-Reply-To: <1188305107.028128.136960@d55g2000hsg.googlegroups.com>
References: <1188305107.028128.136960@d55g2000hsg.googlegroups.com>
Message-ID: <1188306067.339505.280210@i13g2000prf.googlegroups.com>

On Aug 28, 8:45 pm, Tom Gur <gur.... at gmail.com> wrote:
> Hey,
>
> Do you know an easy way to embed the python interpreter in a python
> program (so a non-technical user, which has no idea how to install the
> python interpreter would be able to run the script as an executable) ?

py2exe does this very well for windows executables: http://www.py2exe.org/



From hhygcy at gmail.com  Mon Aug 13 04:59:52 2007
From: hhygcy at gmail.com (Ge Chunyuan)
Date: Mon, 13 Aug 2007 08:59:52 -0000
Subject: verify whether "str" is still callable in Python 2.5.1
In-Reply-To: <f9p5sc$oar$01$1@news.t-online.com>
References: <1186994287.527549.119170@19g2000hsx.googlegroups.com>
	<f9p5sc$oar$01$1@news.t-online.com>
Message-ID: <1186995592.919369.286560@b79g2000hse.googlegroups.com>

On Aug 13, 4:48 pm, Peter Otten <__pete... at web.de> wrote:
> Ge Chunyuan wrote:
> > Once use ActivePython latest version for Python 2.5.1.
> > I happened to find function "str" is not callable, but it is available
> > for Python 2.5.
>
> If it's not callable it's not the str() function, but something else with a
> badly chosen variable name.
>
> >>> callable(str)
> True
> >>> str = "yadda"
> >>> callable(str)
>
> False
>
> Peter

oh, please forget my silly question.
you are absolutely right.



From povkra at gmail.com  Fri Aug 17 07:21:35 2007
From: povkra at gmail.com (fritz)
Date: Fri, 17 Aug 2007 04:21:35 -0700
Subject: Air conditioners for cars!
Message-ID: <1187349695.724671.193520@k79g2000hse.googlegroups.com>

Have a problem with car air conditioner, go here

http://car-air-conditioning.blogspot.com/



From greg at cosc.canterbury.ac.nz  Sun Aug 12 20:52:08 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Mon, 13 Aug 2007 12:52:08 +1200
Subject: who is simpler? try/except/else or try/except
In-Reply-To: <f9ni70$uhr$00$1@news.t-online.com>
References: <46bf4074$0$10626$4fafbaef@reader2.news.tin.it>
	<f9ni70$uhr$00$1@news.t-online.com>
Message-ID: <5i9oh1F3oh4roU1@mid.individual.net>

Peter Otten wrote:
> try:
>     <operation that may fail>
> except <Error I can handle>:
>    <fix it>
> else:
>     <build on successful operation>
> 
> When you move the else suite into the try...except
> 
> try:
>     <operation that may fail>
>     <build on successful operation> #
> except <Error I can handle>:
>    <fix it>

Note that in general the semantics of these are different,
since in the first version the except clause will only catch
exceptions in <operation that may fail>, whereas in the
second it may catch exceptions in <build on successful operation>
as well.

It probably doesn't make a difference in this example, but
there are situations where it can.

--
Greg


From tdwdotnet at gmail.com  Thu Aug 23 16:05:46 2007
From: tdwdotnet at gmail.com (Tim Williams)
Date: Thu, 23 Aug 2007 21:05:46 +0100
Subject: Using Regular Expresions to change .htm to .php in files
In-Reply-To: <B81995429.43.65370.1@mxextra>
References: <B81995429.43.65370.1@mxextra>
Message-ID: <9afea2ac0708231305v539390dew84926f0b0dcd6974@mail.gmail.com>

On 23/08/07, sebzzz at gmail.com <sebzzz at gmail.com> wrote:
> Hi,
>
> I have a bunch of files that have changed from standard htm files to
> php files but all the links inside the site are now broken because
> they point to the .htm files while they are now .php files.
>
> Does anyone have an idea about how to do a simple script that changes
> each .htm in a given file to a .php
>
> Thanks a lot in advance
>

Something like:

Infile = open(f_name,'r+')
Data =  Infile.read()
InFile.write(Data.replace('.htm','.php'))
Infile.close()

:)


From robert.kern at gmail.com  Fri Aug 31 17:42:12 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 31 Aug 2007 16:42:12 -0500
Subject: Biased random?
In-Reply-To: <fb9v07$iij$2@sea.gmane.org>
References: <favd0c$fcu$1@ss408.t-com.hr>	<mailman.80.1188332647.28954.python-list@python.org>	<fb77bq$jtk$1@ss408.t-com.hr>	<fb7a3d$phj$1@sea.gmane.org>
	<fb9bg9$ibi$1@sea.gmane.org>	<fb9nc1$s6v$1@sea.gmane.org>
	<fb9v07$iij$2@sea.gmane.org>
Message-ID: <fba1vp$u2f$1@sea.gmane.org>

Jeffrey Barish wrote:
> I'm sorry that I took the time to respond.

I'm sorry. I didn't intend my post to be as harsh as it was.

-- 
Robert Kern

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



From rbonvall at gmail.com  Thu Aug  9 19:22:14 2007
From: rbonvall at gmail.com (Roberto Bonvallet)
Date: Thu, 09 Aug 2007 16:22:14 -0700
Subject: programmatically define a new variable on the fly
In-Reply-To: <1186697500.024593.303820@x35g2000prf.googlegroups.com>
References: <1186697500.024593.303820@x35g2000prf.googlegroups.com>
Message-ID: <1186701734.914467.279620@q3g2000prf.googlegroups.com>

On Aug 9, 6:11 pm, Lee Sander <lesa... at gmail.com> wrote:
> I would like to define a new variable which is not predefined by me.
> For example,
> I want to create an array called "X%s" where "%s" is to be determined
> based on the data I am processing.

Use a dictionary.



From nospam at nospam.com  Mon Aug 20 11:27:28 2007
From: nospam at nospam.com (Mark T)
Date: Mon, 20 Aug 2007 08:27:28 -0700
Subject: Python equivalent of Perl's $/
References: <mailman.9.1187619031.26576.python-list@python.org>
Message-ID: <Da6dncv3OJZGL1TbnZ2dnUVZ_sOdnZ2d@comcast.com>


"John K Masters" <johnmasters at oxtedonline.net> wrote in message 
news:mailman.9.1187619031.26576.python-list at python.org...
>I am currently working my way through Jeffrey Friedl's book Mastering
> Regular Expressions. Great book apart from the fact it uses Perl for the
> examples.
>
> One particular expression that interests me is '$/ = ".\n"' which,
> rather than splitting a file into lines, splits on a period-newline
> boundary. Combined with Perl's 'while (<>)' construct this seems a great
> way to process the files I am interested in.
>
> Without wishing to start a flame war, is there a way to do this in Python?
>
> Regards, John
> -- 
> War is God's way of teaching Americans geography
> Ambrose Bierce (1842 - 1914)

>>> 'test\ntest2.\ntest3\ntest4.\ntest5'.split('.\n')
['test\ntest2', 'test3\ntest4', 'test5']

-Mark T. 



From programmer.py at gmail.com  Thu Aug 30 14:55:27 2007
From: programmer.py at gmail.com (programmer.py at gmail.com)
Date: Thu, 30 Aug 2007 18:55:27 -0000
Subject: We need PIGs :)
In-Reply-To: <mailman.131.1188450658.28954.python-list@python.org>
References: <mailman.131.1188450658.28954.python-list@python.org>
Message-ID: <1188500127.398478.95540@x40g2000prg.googlegroups.com>

On Aug 30, 12:10 am, "Martin Marcher" <martin.marc... at gmail.com>
wrote:

[snip!]
>
> My idea was to define "Python Implementation Guidelines" (PIGs) that
> specify a problem formalize it enough so that implementations are
> interchangeable (in this example create a module that has an
> "authenticate(username, password)" method so that one could easily
> take that module for any given app and then authenticate against
> postgres, and also against my plaintext file (which was the original -
> quite useless - implementation).
>
> Does that sound like a good idea or would that be over formalization?
>

This may be over-formalization.  For specific problems, there
generally is a pythonic choice.  For instance, suppose your problem is
'I need an ORM' - well the pythonic choice is something along the
lines of SQLObject or SQLAlchemy.

Then there are other cases where there are too many choices - "I need
a web framework." -- turbogears, django, pylons, and whatever else you
want to throw into the pot.  (Be smart, choose pylons [just kidding,
but I did promote pylons and attach a just kidding disclaimer --
clever, huh?])

> Personally I think that would be great as I could search the PIGs at
> (hopefully) python.org find out the number and search at koders.com or
> code.google.com for python code that has "PIG: XXX" in the metadata
> docstring or wherever - maybe even a __pig__ = XXX variable.
>

I think most of what you're after may be in the python cookbook
(http://aspn.activestate.com/ASPN/Cookbook/Python) or the PyPi (http://
pypi.python.org/pypi).
> any input is welcome (also point me to the place where that can be
> found if it already exists)
> martin

Or maybe I completely misunderstand what you mean.

G' Day!
jw



From david at asdf.asdf  Mon Aug 27 01:47:25 2007
From: david at asdf.asdf (bambam)
Date: Mon, 27 Aug 2007 15:47:25 +1000
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csi2tn49esmc3@corp.supernews.com>
	<mailman.230.1187928865.32294.python-list@python.org>
	<13csqk47j0c56b0@corp.supernews.com>
	<CqSdnRl2x8928FPbnZ2dnUVZ_jSdnZ2d@speakeasy.net>
	<13ct7v3qn2v5206@corp.supernews.com>
	<mailman.238.1187948359.32294.python-list@python.org>
	<13d49lk6ue2as6d@corp.supernews.com>
	<13d4hutad1dq699@corp.supernews.com>
	<7xk5rhvcq0.fsf@ruckus.brouhaha.com>
Message-ID: <13d4pbce7uqva68@corp.supernews.com>

Thank you. I figured the set would probably be faster,
but the lists are small, and I'm concerned that the code
is going to look Byzantine if I keep swapping between
lists, sets and dictionaries :~).

At the moment there are no sets or dictionaries in the
entire code base I am working with. I'm not sure if the
place I am looking at right now is supposed to support
duplicates or not: duplicates are permitted, but they
cause report anomalies.

Steve.


"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote in message 
news:7xk5rhvcq0.fsf at ruckus.brouhaha.com...
> "bambam" <david at asdf.asdf> writes:
>> Is it safe to write
>> A = [x for x in A if x in U]
>> or is that undefined? I understand that the slice operation
>> can be used to make a temporary copy, so I could write
>> A=[x for x in A[:] if x in U]
>> but I've just copied that without any understanding.
>
> You get a temporary copy either way; note you're going to linearly
> search U on every pass.  Maybe you want:
>
>   SU = set(u)
>   A = [a for x in A if x in SU]
>
> or possibly
>
>   A = list(set(A) & set(U))
>
> which will remove duplicate elements from A and not necessarily keep
> them in the same order, but is likely to be fastest of the bunch. 




From bbxx789_05ss at yahoo.com  Sun Aug 12 16:42:06 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 12 Aug 2007 13:42:06 -0700
Subject: wxPython - drawing without paint event
In-Reply-To: <5i98bsF3nmbavU1@mid.individual.net>
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
	<1186738813.373909.96230@x35g2000prf.googlegroups.com>
	<1186796567.331348.42450@q3g2000prf.googlegroups.com>
	<5i5l0dF2lortaU1@mid.individual.net>
	<1186883988.585048.16590@m37g2000prh.googlegroups.com>
	<5i8befF3o5no1U1@mid.individual.net>
	<1186928595.014008.61950@b79g2000hse.googlegroups.com>
	<5i98bsF3nmbavU1@mid.individual.net>
Message-ID: <1186951326.218981.17820@b79g2000hse.googlegroups.com>

On Aug 12, 2:20 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> But any suggestions what's
> better for a beginner? The (incomplete) tutorial surely not.
>

Another GUI toolkit.




From bj_666 at gmx.net  Sat Aug 11 14:56:05 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 11 Aug 2007 18:56:05 GMT
Subject: decorators - more than just syntactic sugar
References: <46be005e$0$13866$ba620e4c@news.skynet.be>
Message-ID: <5i6f25F3ml00gU5@mid.uni-berlin.de>

On Sat, 11 Aug 2007 20:30:54 +0200, Helmut Jarausch wrote:

> are decorators more than just syntactic sugar in python 2.x and what
> about python 3k ?

They are just syntactic sugar.

@spam
def ham():
    pass

is the same as

def ham():
    pass

ham = spam(ham)

> How can I find out the predefined decorators?

*The* predefined decorators?  Decorators are just functions after all. 
There are some meant to be used as decorators but there are also
"ordinary" functions that may make sense as decorators.

Ciao,
	Marc 'BlackJack' Rintsch


From mark.dufour at gmail.com  Fri Aug 24 14:46:44 2007
From: mark.dufour at gmail.com (srepmub)
Date: Fri, 24 Aug 2007 18:46:44 -0000
Subject: ANN: Compyler 0.1
In-Reply-To: <1187020875.575423.58000@o61g2000hsh.googlegroups.com>
References: <mailman.1859.1186862018.22759.python-list@python.org>
	<46bf2ea3$0$240$e4fe514c@news.xs4all.nl>
	<1187020875.575423.58000@o61g2000hsh.googlegroups.com>
Message-ID: <1187981204.406664.158160@e9g2000prf.googlegroups.com>


>   + Generates C++ so you need an intermediate compiler (probably only
> an issue on windows)

Shed Skin comes with a stripped down MingW/G++, so compiling and
running/importing compiled code is as easy as 'ss blah.py; make run'
or 'ss -e blah.py; python; import blah' under both Windows and Linux
(in theory, of course).


Mark Dufour (Shed Skin author).




From bronger at physik.rwth-aachen.de  Fri Aug 24 05:04:33 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 24 Aug 2007 11:04:33 +0200
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com> <87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com> <87tzqp77my.fsf@wilson.homeunix.com>
	<7xy7g1if24.fsf@ruckus.brouhaha.com>
Message-ID: <87mywh717i.fsf@wilson.homeunix.com>

Hall?chen!

Paul Rubin writes:

> Torsten Bronger <bronger at physik.rwth-aachen.de> writes:
>
>> The differences to LaTeX are explained comprehensively on the
>> webpage, and actually LaTeX is the real competitor rather than
>> reStructuredText.
>
> TeX/LateX have been around forever and are well established
> standards, as awful as they are.  Why do we want ANOTHER markup
> language?

Well, because they are awful.  ;-)  I don't see that there is a
bunch of already existing projects, in fact, I don't see anyone
challenging LaTeX at all.  However, competition is a good thing, and
I think there are enough aspects about LaTeX that can be done better
so that this project is worth being done.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From steve at holdenweb.com  Mon Aug 27 22:22:47 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 27 Aug 2007 22:22:47 -0400
Subject: Socket - gaierror
In-Reply-To: <1188253525.718844.115500@q5g2000prf.googlegroups.com>
References: <1188242671.182072.130150@r23g2000prd.googlegroups.com>	<OIidnbjzCJVLu07bnZ2dnUVZ_gidnZ2d@comcast.com>	<1188244050.029920.314700@i13g2000prf.googlegroups.com>
	<1188253525.718844.115500@q5g2000prf.googlegroups.com>
Message-ID: <fb00tm$vu2$1@sea.gmane.org>

half.italian at gmail.com wrote:
> On Aug 27, 12:47 pm, half.ital... at gmail.com wrote:
>> On Aug 27, 12:32 pm, Larry Bates <larry.ba... at websafe.com> wrote:
>>
>>
>>
>>> half.ital... at gmail.com wrote:
>>>> Hi all,
>>>> I'm having trouble with the socket module resolving a hostname.  It
>>>> seems like this is a system level problem, but I'm not even sure where
>>>> to start.  I can ping the smtp server by name and IP, but when
>>>> smtp.SMTP("theHost") tries to get the hostname, it keeps giving me the
>>>> following error:
>>>>   File "bin/program.py", line 123, in notify
>>>>     smtp = smtplib.SMTP("theHost")
>>>>   File "/usr/lib/python2.4/smtplib.py", line 255, in __init__
>>>>     addr = socket.gethostbyname(socket.gethostname())
>>>> gaierror: (-2, 'Name or service not known')
>>>> I tried changing to a different smtp server, using an ip instead of a
>>>> host name.  I could ping both boxes by name oor IP.
>>>> any ideas?
>>>> ~Sean
>>> The specific error shown is a DNS resolution problem.  Based on the
>>> URL "theHost" smtplib can't resolve to an IP address (which is what
>>> socket.gethostbyname does).  You don't say what happened when you changed to ip,
>>> but I suspect it is a different error or some other problem.  Maybe a firewall
>>> issue (port 25 not open?), but I'm just guessing.
>>> -Larry
>> Changing it to IP gives me the same exact error...
>>
>>   File "bin/prgram.py", line 123, in notify
>>     smtp = smtplib.SMTP("XXX.XXX.XXX.XXX")
>>
>>   File "/usr/lib/python2.4/smtplib.py", line 255, in __init__
>>     addr = socket.gethostbyname(socket.gethostname())
>>
>> gaierror: (-2, 'Name or service not known')
>>
>> Looks like the smtp port is closed on the client machine...doh Should
>> have gotten to that!
>>
>> Thank you.
>>
>> ~Sean
> 
> I take it back, that wasn't the solution.  I got it to work by
> haacking smtplib with a static host instead of the
> socket.gethostbyname(socket.gethostname()) call...but if I leave that
> in there I might get shot one day.  What could cause the shell to be
> able to resolve the addresses properly, but not python?
> nnsswitch.conf ?
> 
> I don't know enough about what's going on in the background.  Any
> other ideas? Or should I try this on a unix board?
> 
Well the first thing to do is call socket.gethostname() and see what it 
returns, then call socket.gethostbyname() on the result. Once you know 
what's failing we might be able to help.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From roger.miller at nova-sol.com  Fri Aug 10 19:15:51 2007
From: roger.miller at nova-sol.com (Roger Miller)
Date: Fri, 10 Aug 2007 16:15:51 -0700
Subject: float to string with different precision
In-Reply-To: <1186771026.472118.137090@d30g2000prg.googlegroups.com>
References: <1186731617.128913.279360@m37g2000prh.googlegroups.com>
	<f9h6kj$sj6$00$1@news.t-online.com>
	<1186771026.472118.137090@d30g2000prg.googlegroups.com>
Message-ID: <1186787751.850838.150010@x40g2000prg.googlegroups.com>

On Aug 10, 8:37 am, Zentrader <zentrad... at gmail.com> wrote:
>
> If the above does not work
> [/code]test_list = [ 5.32, 10.35634, 289.234 ]
> for num in test_list :
>    str_num = "%11.5f" % (num)       ## expand to at least 5
>    print str_num, "-->", str_num.strip()[:5][/code]

This has the disadvantage that it doesn't round the last digit.  For
example 10.356634 yields 10.356 instead of 10.357.

You can use '*' in format strings to take a numeric field value from a
variable.  For example

   ndecimals = 2
   print "%5.*f" % (ndecimals, x)

formats x with 2 digits following the decimal point.  Or you can
simply
cobble up a format string at run time:

   format = "%%5.%df" % ndecimals
   print format % x



From rschroev_nospam_ml at fastmail.fm  Sun Aug 19 18:46:24 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sun, 19 Aug 2007 22:46:24 GMT
Subject: Syntax Question - list multiplication
In-Reply-To: <1187560273.146491.90530@r29g2000hsg.googlegroups.com>
References: <1187560273.146491.90530@r29g2000hsg.googlegroups.com>
Message-ID: <4L3yi.61391$W21.1628190@phobos.telenet-ops.be>

Pablo Torres schreef:
> Hi guys!
> 
> I am working on Conway's Game of Life right now and I've run into a
> little problem.
> I represent dead cells with 0s and live ones with 1s. Check this out:
> 
> 	>>> grid = [[0] * 3] * 3
> 	>>> grid
> 	[[0, 0, 0], [0, 0, 0], [0, 0, 0]]
> 	>>> grid[0][0] = 1
> 	[[1, 0, 0], [1, 0, 0], [1, 0, 0]]
> 
> Now, that's not what I want. I just want the first element of the
> first sublist to be a 1, not the first of every one. Here's what I
> tried and didn't work:
> 
> 0.  grid = [[0] * 3][:] * 3    then the same grid[0][0] = 1 statement
> 1.  grid = [[0][:] * 3] * 3    followed by the same assignment
> 2.  (grid[0])[0] = 1    with the original initialization of the grid
> 
> So, that means that it isn't a problem with two different variables
> refering to the same list (0. and 1. prove that). What I don't
> understand is why 2. doesn't work either. I'm baby-feeding my
> instructions to Python and the mistake is still there. Any ideas?
> 
> Hope you can help. Thanks in advance,

The multiplication operator doesn't make new copies; all elements 
reference the same object, as you can see with id():

 >>> lst = [0] * 3
 >>> lst
[0, 0, 0]
 >>> id(lst[0]), id(lst[1]), id(lst[2])
(9788716, 9788716, 9788716)

As a consequence, if you modify one element, you change them all (since 
it's all the same object). Solution: make sure to create independent lists.

 >>> grid = [[0] * 3 for i in range(3)]
 >>> grid
[[0, 0, 0], [0, 0, 0], [0, 0, 0]]
 >>> grid[0][0] = 1

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From ldo at geek-central.gen.new_zealand  Sun Aug 12 23:34:30 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 13 Aug 2007 15:34:30 +1200
Subject: question: how to transfer objects between server and client?
References: <1186823076.923464.294120@57g2000hsv.googlegroups.com>
	<46bd7faa$0$239$e4fe514c@news.xs4all.nl>
	<1186826410.019139.121680@l70g2000hse.googlegroups.com>
Message-ID: <f9ojbl$bpi$1@lust.ihug.co.nz>

In message <1186826410.019139.121680 at l70g2000hse.googlegroups.com>,
OpenPavilion wrote:

> just found out, that if I use "pickle.dumps(object)" (on client side)
> and "pickle.loads(object)" (on server side) before and after sending,
> I have access to the object.

That's assuming that the client and server can trust each other. If you
can't be sure of that, then this sounds like it could be a security hole.


From robert.kern at gmail.com  Mon Aug 27 19:02:58 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 27 Aug 2007 18:02:58 -0500
Subject: Biased random?
In-Reply-To: <favgh4$1gm3$1@grapevine.csail.mit.edu>
References: <favd0c$fcu$1@ss408.t-com.hr>
	<favgh4$1gm3$1@grapevine.csail.mit.edu>
Message-ID: <favl75$98i$1@sea.gmane.org>

Jun-geun Park wrote:
> Ivan Voras wrote:
>> Hi,
>>
>> I have a list of items, and need to choose several elements from it,
>> "almost random". The catch is that the elements from the beginning
>> should have more chance of being selected than those at the end (how
>> much more? I don't care how the "envelope" of probability looks like at
>> this point - can be linear). I see that there are several functions in
>> Python standard libraries for various distribution, but is there an easy
>> pythonic way to make them do what I need?
> 
> That's weird. random.randint(a,b) will be enough for most cases. Test
> your system to see the distribution is uniform with something like:

The distribution is uniform. However, he wants a way to get non-uniform sampling
of that list.

-- 
Robert Kern

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



From david at nospam.spam  Mon Aug 13 23:19:35 2007
From: david at nospam.spam (david)
Date: Tue, 14 Aug 2007 13:19:35 +1000
Subject: wxPython before MainLoop
In-Reply-To: <mailman.1948.1187055857.22759.python-list@python.org>
References: <13bl9a75laqcm70@corp.supernews.com>	<13bnh5bs4b9h427@corp.supernews.com>	<5i3b1jF3n5bdtU1@mid.individual.net>	<13c1v79hs0dob3@corp.supernews.com>
	<mailman.1948.1187055857.22759.python-list@python.org>
Message-ID: <13c27q5meq90lb2@corp.supernews.com>

Steve, it wasn't me that raised the comparison
with MFC. If you don't think that's a helpful
comparison, why not reply to that post instead?

I don't mind Bj?rn's suggestion that I don't
know what I'm talking about, because I started
it by telling him he was wrong.

But you don't have that excuse.

(david)




Steve Holden wrote:
> [david] wrote:
>> Well yes, I have tried this app with native windows,
>> and I know how to do it.
>>
>> But if all wxPython can offer is a poor imitation
>> of MFC, I'm better off using MFC aren't I?
>>
>> And too all those people who wrote back to insist
>> that users MUST explicitly build a multi-threaded
>> framework for wxPython:
>>
>> It's supposed to already be a framework :~)
>>
> The answer is simple. If you don't see any advantage to using wxPython 
> then don't use it. Personally I believe wxPython is far from a poor 
> imitation of MFC, but if you are already familiar with MFC then go ahead 
> and use it.
> 
> regards
>  Steve


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug 30 04:53:09 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 30 Aug 2007 10:53:09 +0200
Subject: Python doesn't see the directories I create
In-Reply-To: <ldvBi.293202$LE1.92748@newsfe13.lga>
References: <ldvBi.293202$LE1.92748@newsfe13.lga>
Message-ID: <46d6856b$0$17674$426a74cc@news.free.fr>

mr_gadget a ?crit :
> When I create a subfolder, python is not seeing it. Can someone please 
> explain this behaviour ? I just started with python, read the tutorial over 
> the weekend and am writing my very first script. So I may not be seeing 
> something. Both os.path and glob.glob seem not to see a folder I created. 
> Other sibling folders seem to work fine. On a whim I tried paths with \\ 
> double slashes and that worked. But why should single slashes work for some 
> folders and not for others ??

s/slash/antislash/g

It's a very well known gotcha due to MS's choice to use the antislash as 
path separator. In most languages - Python included - the antislash is 
used for escape sequences (non-printable characters). '\r' is the escape 
sequence for CR (carriage return). Doubling the antislash prevents 
escaping.

You can avoid all escaping by using raw strings:

mypath = r"C:\enhancement\rawfiles\"

Also and IIRC, using slash instead should also work, ie:

mypath = r"C:/enhancement/rawfiles/"

HTH


From erik at myemma.com  Mon Aug 13 10:49:44 2007
From: erik at myemma.com (Erik Jones)
Date: Mon, 13 Aug 2007 09:49:44 -0500
Subject: Database intensive application
In-Reply-To: <1186922698.918184.31210@x40g2000prg.googlegroups.com>
References: <1186895306.237395.189530@z24g2000prh.googlegroups.com>
	<1186922698.918184.31210@x40g2000prg.googlegroups.com>
Message-ID: <AFFD6229-B995-4356-948F-962F175FDB0C@myemma.com>


On Aug 12, 2007, at 7:44 AM, Viewer T. wrote:

>  and Yes, Python
> has awesome database support and can satisfy almost all database  
> needs.

Wow.  Nobody ever told me Python was *that* kind of language :)

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From deets at nospam.web.de  Mon Aug 20 10:58:55 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 20 Aug 2007 16:58:55 +0200
Subject: Newbee Question
In-Reply-To: <mailman.15.1187620149.26576.python-list@python.org>
References: <mailman.15.1187620149.26576.python-list@python.org>
Message-ID: <5itohrF3qv9t4U1@mid.uni-berlin.de>

HD1956 schrieb:
> This is probably a simple code. I am a truck driver who gets paid by 
> stops and cases. I am trying to figure out how to code my stop pay. I 
> get 40 cents per stop up to 22 stops, and $1.40 per stops after that. 
> 

Sounds a bit like homework. Which usually isn't simply delivered here.

Can you show us some code you worked on, then we might suggest enhancements.

Diez


From Graham.Dumpleton at gmail.com  Mon Aug 20 18:48:46 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Mon, 20 Aug 2007 22:48:46 -0000
Subject: Overriding Thread.join in derived class.
In-Reply-To: <1187552425.752125.302290@a39g2000hsc.googlegroups.com>
References: <1187422280.018913.184990@q3g2000prf.googlegroups.com>
	<1187552425.752125.302290@a39g2000hsc.googlegroups.com>
Message-ID: <1187650126.708308.18310@z24g2000prh.googlegroups.com>

On Aug 20, 5:40 am, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
> On 18 ago, 04:31, Graham Dumpleton <Graham.Dumple... at gmail.com> wrote:
>
>
>
> > If one creates a thread using threading.Thread and makes it a daemon
> > by calling setDaemon(), then when Python is exiting it will not
> > attempt to call join() on that thread and wait for it to complete
> > first. [...]
> > End result is that it could result in a Python exception at some
> > point, evidenced by messages starting with:
> > Exception in thread Thread-1 (most likely raised during interpreter
> > shutdown) [...]
>
> > In order to avoid this, do people think that as an alternative to
> > creating daemonised thread that it would be reasonable to create a
> > derived Thread class for the particular task which overrides
> > Thread.join() method to set some flag or otherwise take some action
> > that the thread would notice to tell it to stop, and then call base
> > class Thread.join().
>
> > This way you can flag the thread to shutdown automatically when Python
> > is going around calling join() on non daemonised threads.
>
> > Or am I missing the obvious as far as ways of flagging threads to tell
> > them to stop?
>
> > Note that this is where Python is being used embedded in a C program.
> > There is no Python main function where code can be put to signal
> > threads to otherwise stop.
>
> This last statement is important. You need "some" way to tell the
> threads to stop working. Usually the thread's run() method is a big
> loop; you need to tell it somehow to exit the loop. By example, if you
> are using a Queue, put a sentinel object in it; or use an Event
> object; or at least a global variable.
> Overriding thread.join() as you suggest above may be a good place to
> do that, if you don't have another chance.

I already use the Queue method to flag the thread to stop. In practice
the question is more theoretical at the moment as I am able to stop
the thread by registering an atexit callback which stuffs something on
the queue and everything works okay.

The question was me more thinking out loud and wandering what other
peoples opinions were in it.

What makes this stuff even more tricky is that prior to Python 2.5,
the joining with non daemonised threads was done in a callback
registered with the atexit module. This meant it could occur in the
middle of other atexit callbacks being called and thus no absolute
certainty as to ordering.

In Python 2.5, the joining with non daemonised threads was moved to a
distinct phase before atexit callbacks were called. This was good for
non daemonised threads as it gave you more certainty. Still less for
daemonised thread though as although can use atexit callbacks to
trigger a thread to shutdown and then wait on it if necessary, still
doing stuff when some atexit callbacks may have already been called.

Thus why I was hunting for a slightly more predictable method for
daemonised threads, although would be dependent on Python 2.5 or later
being used if you absolutely need it to occur before atexit callbacks
called.

Also, just to make it even more complicated, when using Python in an
embedded manner and using secondary sub interpreters, destroying a
secondary sub interpreter does not result in the atexit callbacks
being called, nor joining with non daemonised threads (at least for <
2.5, can't remember for certain about 2.5 but don't think it does it
either). Thus, if you need these things to occur for secondary sub
interpreters, you must write code yourself to trigger both the thread
joining and atexit callbacks. :-(

Graham



From oliver at obeattie.com  Sun Aug 19 13:05:16 2007
From: oliver at obeattie.com (oliver at obeattie.com)
Date: Sun, 19 Aug 2007 17:05:16 -0000
Subject: Sorting a list of Unicode strings?
In-Reply-To: <46C87772.2010603@web.de>
References: <1187542237.139346.6910@o80g2000hse.googlegroups.com>
	<46C87772.2010603@web.de>
Message-ID: <1187543116.941243.200960@r34g2000hsd.googlegroups.com>

On Aug 19, 6:01 pm, Stefan Behnel <stefan.behnel-n05... at web.de> wrote:
> oli... at obeattie.com wrote:
> > Hey Guys,
>
> ... and girls - maybe ...
>
> > Maybe I'm missing something fundamental here, but if I have a list of
> > Unicode strings, and I want to sort these alphabetically, then it
> > places those that begin with unicode characters at the bottom.
>
> That's because "Unicode" is more than one alphabet. unicode objects compare
> based on the Unicode character value, so sort() does alike.
>
> Stefan

Thanks for putting me right -- gals indeed!

Anyway, I know _why_ it does this, but I really do need it to sort
them correctly based on how humans would look at it.

Any ideas?



From zentraders at gmail.com  Sat Aug 18 21:13:30 2007
From: zentraders at gmail.com (Zentrader)
Date: Sat, 18 Aug 2007 18:13:30 -0700
Subject: How to call module functions inside class instance functions?
In-Reply-To: <1187484041.838615.259980@e9g2000prf.googlegroups.com>
References: <1187484041.838615.259980@e9g2000prf.googlegroups.com>
Message-ID: <1187486010.565278.264150@l22g2000prc.googlegroups.com>

On Aug 18, 5:40 pm, beginner <zyzhu2... at gmail.com> wrote:
> Hi Everyone,
>
> I have encountered a small problems.  How to call module functions
> inside class instance functions? For example,  calling func1 in func2
> resulted in a compiling error.
>
> "my module here"
>
> def func1():
>      print "hello"
>
> class MyClass:
>    def func2():
>          #how can I call func1 here.
>          func1() #results in an error
>
> Thanks,
> Geoffrey

You might want to check one of the online tutorials about how to code
classes.  Google or look at "Learning Python" here http://www.python-eggs.org/
def func1():
     print "hello"

class MyClass:
   def func2(self):
         #how can I call func1 here.
         func1() #results in an error

MC= MyClass()
MC.func2()



From rabidpoobear at gmail.com  Sat Aug  4 15:25:29 2007
From: rabidpoobear at gmail.com (Luke Paireepinart)
Date: Sat, 04 Aug 2007 14:25:29 -0500
Subject: [pygame] pyweek is happening august 02 - august 09
In-Reply-To: <200708041832.l74IWkRY027388@theraft.openend.se>
References: <200708041832.l74IWkRY027388@theraft.openend.se>
Message-ID: <46B4D2A9.1010405@gmail.com>

Laura Creighton wrote:
> 00:00 UTC 2007-09-02 to 00:00 UTC 2007-09-09 exactly.  See
> www.pyweek.org
>
> PyconUK is happening.  http://www.pyconuk.org/ 8th and 9th September.
>
> This means that those of us who generally do not see each other but are
> going to PyconUK could put together an entry and then sprint together
> on it before PyCon UK.  There would be this terrible torment -- do
> I attend the con or get my game to work -- but it is still the
> best chance some of us have to work together yet.
>
> Talk to me if you are interested in maybe making a PyconUK pygame
> team.  I think that this could be a lot of fun.  Sign up on
> www.pyweek.org if you think so, as well.  But mail me.
>
> John -- assuming we want to meet up _before_ PyConUK -- can that
> work?  Can you point us at a cheap hostel for a few days?
>
> Laura Creighton
>   
Laura - Pyweek is happening the first week in September, not august.
Thanks for giving me a good scare, thinking i missed the first half already!


From nick at craig-wood.com  Mon Aug 20 11:30:10 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 20 Aug 2007 10:30:10 -0500
Subject: How to decompress .Z file?
References: <mailman.1.1187600927.13175.python-list@python.org>
Message-ID: <slrnfcjbqd.57s.nick@irishsea.home.craig-wood.com>

Hyunchul Kim <sundol at sfc.keio.ac.jp> wrote:
>  How can .Z file be decompressed?

The old unix program compress used to generate these files.

  http://packages.debian.org/unstable/utils/ncompress

You'll find the command line programs gzip/gunzip/zcat can decompress
them too.

>  According to python library reference, .Z file might not be
>  supported by python, yet.

Unfortunately the python gzip library doesn't read .Z files.

I'd pipe the data to zcat using subprocess to decompress from python.

I haven't used a .Z files for many many years - where are you getting
them from?

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


From hat at se-162.se.wtb.tue.nl  Wed Aug 15 10:08:33 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 15 Aug 2007 16:08:33 +0200
Subject: Retry: Question about FutureWarning
References: <mailman.1994.1187142273.22759.python-list@python.org>
	<ubKdnTirKeU6xl_bnZ2dnUVZ_rzinZ2d@speakeasy.net>
	<1187183459.675090.194800@w3g2000hsg.googlegroups.com>
Message-ID: <slrnfc6271.vuq.hat@se-162.se.wtb.tue.nl>

On 2007-08-15, Paul McGuire <ptmcg at austin.rr.com> wrote:
> On Aug 14, 8:49 pm, Erik Max Francis <m... at alcyone.com> wrote:
>
> So if by '0xFFFFFFFF' you meant -1, then change this line to use -1.
> Otherwise, if you really meant 4294967295L, leave it at 0xFFFFFFFF and
> move on.

A third option is to specify 0xFFFFFFFF as 0xFFFFFFFFL in the latter case to
get rid of the warning.

Albert


From seancron at gmail.com  Thu Aug 30 15:45:49 2007
From: seancron at gmail.com (seancron)
Date: Thu, 30 Aug 2007 19:45:49 -0000
Subject: Python weather application
Message-ID: <1188503149.066836.245000@l22g2000prc.googlegroups.com>

Does anybody have any suggestions for getting started on desigining a
desktop weather application in Python?

I've been looking for access to weather data and while I have found
several including the weather.com service I've decided to use the
Yahoo! Rss Weather feed since it doesn't have a license like the
weather.com service does. However one problem I have with it is that
it only accepts zip codes or locations ids.  So if a user was to enter
the name of the city instead of those two there would be an error. I
could make it so they could only enter in the location code or zip
code but I would really prefer to have it be automatically corrected.
Does anyone have ideas on how to go about this or have an other
suggestions?

Thanks,
Sean



From fabioztessitore at libero.it  Sun Aug 12 13:16:36 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 12 Aug 2007 17:16:36 GMT
Subject: who is simpler? try/except/else or try/except
Message-ID: <46bf4074$0$10626$4fafbaef@reader2.news.tin.it>

Hi all,

reading Dive Into Python, on Chapter 6 (exception), I've found:

"This code comes from the getpass module, a wrapper module for getting a 
password from the user"

try:
	import termios, TERMIOS
except ImportError:
	try:
		import msvcrt
	except ImportError:
		try:
			from EasyDialogs import AskPassword
		except ImportError:
			getpass = default_getpass
		else:
			getpass = AskPassword
	else:
		getpass = win_getpass
else:
	getpass = unix_getpass

Knowing that this code is very simple, my question is about simplicity. I 
think it is simpler the following code. I haven't a long experience on 
Python, so I'd like to know your opinions about.

try:
	import termios, TERMIOS
	getpass = unix_getpass

except ImportError:
	try:
		import msvcrt
		getpass = win_getpass

	except ImportError:
		try:
			from EasyDialogs import AskPassword
			getpass = AskPassword

		except ImportError:
			getpass = default_getpass

thanks,
Fabio


From dogatemycomputer at gmail.com  Mon Aug 20 14:44:12 2007
From: dogatemycomputer at gmail.com (dogatemycomputer at gmail.com)
Date: Mon, 20 Aug 2007 18:44:12 -0000
Subject: urllib2.urlopen(url) pulling something other than HTML
Message-ID: <1187635452.841155.88720@a39g2000hsc.googlegroups.com>


I am reading "Python for Dummies" and found the following example of a
web crawler that I thought was interesting.  The first time I keyed
the program and executed it I didn't understand it well enough to
debug it so I just skipped it.  A few days later I realized that it
failed after a few seconds and I wanted to know if it was a
shortcoming of Python, a mistype on my part or just an inherent
problem with the script so I retyped it and started trying to figure
out what went wrong.

Please keep in mind I am very new to coding so I have tried RTFM
without much success.   I have a basic understanding of what the
application is doing but I want to understand WHY it is doing it or
what the rationale is for doing it.  Not necessarily how it does it..
In any case here is the gist of the app.

1 - a new spider is created
2 - it takes a single argument which is a web address (http://
www.google.com)
3 - the spider pulls a copy of the page source
4 - the spider parses it for links and if the link is on the same
domain and has not already been parsed then it appends the link to the
list of pages to be parsed

Being new I have a couple of questions that I am hoping someone can
answer with some degree of detail.

----------------------------------------------------------
f = formatter.AbstractFormatter(formatter.DumbWriter(StringIO()))
parser = htmllib.HTMLParser(f)
    parser.feed(html)
    parser.close()
    return parser.anchorlist
----------------------------------------------------------

I get the idea that we're allocating some memory that looks like a
file so formatter.dumbwriter can manipulate it.  The results are
passed to formatter.abstractformatter which does something else to the
HTML code.  The results are then passed to "f" which is then passed to
htmllib.HTMLParser so it can parse the html for links.   I guess I
don't understand with any great detail as to why this is happening.
I know someone is going to say that I should RTFM so here is the gist
of the documentation:

formatter.DumbWriter = "This class is suitable for reflowing a
sequence of paragraphs."
formatter.AbstractFormatter = "The standard formatter. This
implementation has demonstrated wide applicability to many writers,
and may be used directly in most circumstances. It has been used to
implement a full-featured World Wide Web browser." <-- huh?

So.. What is dumbwriter and abstractformatter doing with this HTML and
why does it need to be done before parser.feed() gets a hold of it?

The last question is..   I can't find any documentation to explain
where the "anchorlist" attribute came from?   Here is the only
reference to this attribute that I can find anywhere in the Python
documentation.

----------------------
anchor_bgn(  	href, name, type)
    This method is called at the start of an anchor region. The
arguments correspond to the attributes of the <A> tag with the same
names. The default implementation maintains a list of hyperlinks
(defined by the HREF attribute for <A> tags) within the document. The
list of hyperlinks is available as the data attribute anchorlist.
----------------------

So ..  How does an average developer figure out that parser returns a
list of hyperlinks in an attribute called anchorlist?  Is this
something that you just "figure out" or is there some book I should be
reading that documents all of the attributes for a particular
method?   It just seems a bit obscure and certainly not something I
would have figured out on my own.  Does this make me a poor developer
who should find another hobby?   I just need to know if there is
something wrong with me or if this is a reasonable question to ask.

The last question I have is about debugging.   The spider is capable
of parsing links until it reaches:

"html = get_page(http://www.google.com/jobs/fortune)" which returns
the contents of a pdf document, assigns the pdf contents to html which
is later passed to parser.feed(html) which crashes.

I'm smart enough to know that whenever you take in some input that you
should do some basic type checking to make sure that whatever you are
trying to manipulate (especially if it originates from outside of your
application) won't cause your application to crash.  If you're
expecting an ASCII character then make sure you're not getting an
object or string of text.

How would an experienced python developer check the contents of "html"
to make sure its not something else other than a blob of HTML code?  I
should note an obviously catch-22..   How do I check the HTML in such
a way that the check itself doesn't possibly crash the app?  I thought
about:

try:
    parser.feed(html)
except parser.HTMLParseError:
    parser.close()


.... but i'm not sure if that is right or not?  The app still crashes
so obviously i'm doing something wrong.


Here is the full app for your review.

Thank you for any help you can provide!  I greatly appreciate it!


#!/usr/bin/python

#these modules do most of the work
import sys
import urllib2
import urlparse
import htmllib, formatter
from cStringIO import StringIO

def log_stdout(msg):
    """Print msg to the screen."""
    print msg

def get_page(url, log):
    """Retrieve URL and return comments, log errors."""
    try:
        page = urllib2.urlopen(url)
    except urllib2.URLError:
        log("Error retrieving: " + url)
        return ''
    body = page.read()
    page.close()
    return body

def find_links(html):
    """return a list of links in HTML"""
    #We're using the parser just to get the hrefs
    f = formatter.AbstractFormatter(formatter.DumbWriter(StringIO()))
    parser = htmllib.HTMLParser(f)
    parser.feed(html)
    parser.close()
    return parser.anchorlist

class Spider:
    """
    The heart of this program, finds all links within a web site.

    run() contains the main loop.
    process_page() retrieves each page and finds the links.
    """

    def __init__(self, startURL, log=None):
        #this method sets initial values
        self.URLs = set() #create a set
        self.URLs.add(startURL) #add the start url to the set
        self.include = startURL
        self._links_to_process = [startURL]
        if log is None:
            #use log_stdout function if no log provided
            self.log = log_stdout
        else:
            self.log = log

    def run(self):
        #process list of URLs one at a time
        while self._links_to_process:
            url = self._links_to_process.pop()
            self.log("Retrieving: " + url)
            self.process_page(url)

    def url_in_site(self, link):
        #checks weather the link starts with the base URL
        return link.startswith(self.include)

    def process_page(self, url):
        #retrieves page and finds links in it
        html = get_page(url, self.log)
        for link in find_links(html):
            #handle relative links
            link = urlparse.urljoin(url,link)
            self.log("Checking: " + link)
            #make sure this is a new URL within current site
            if link not in self.URLs and self.url_in_site(link):
                self.URLs.add(link)
                self._links_to_process.append(link)

if __name__ == '__main__':
    #this code runs when script is started from command line
    startURL = sys.argv[1]
    spider = Spider(startURL)
    spider.run()
    for URL in sorted(spider.URLs):
        print URL



From gherron at islandtraining.com  Thu Aug 16 12:05:48 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 16 Aug 2007 09:05:48 -0700
Subject: A problem with Time
In-Reply-To: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
References: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <46C475DC.2@islandtraining.com>

special_dragonfly wrote:
> Hello,
>
> I need to return the date yesterday in the form DDMMYYYY. I looked through 
> the modules: time, datetime and calendar but can't find anything that leaps 
> out at me.
>
> The problem I'm having is that although I can use time.localtime and get a 
> tuple of the year, month, day and so forth, I don't believe I can just minus 
> 1 from the day, because I don't think it's cyclic, also, I can't see the 
> date being linked in with the month.
>
> So is there any way of getting yesterdays date?
>
> Thank You
>
> Dominic 
>
>
>   
Here's how I'd do it:


>>> import time
>>> secondsPerDay = 24*60*60
>>> today = time.time()
>>> yesterday = today - secondsPerDay
>>> print time.strftime("%d%m%Y",time.localtime(today))
16082007
>>> print time.strftime("%d%m%Y",time.localtime(yesterday))
15082007

Gary Herron




From fabioztessitore at libero.it  Sun Aug 12 14:01:22 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 12 Aug 2007 18:01:22 GMT
Subject: who is simpler? try/except/else or try/except
References: <46bf4074$0$10626$4fafbaef@reader2.news.tin.it>
	<mailman.1879.1186940975.22759.python-list@python.org>
Message-ID: <46bf4af2$0$10626$4fafbaef@reader2.news.tin.it>

Il Sun, 12 Aug 2007 13:49:18 -0400, Steve Holden ha scritto:

>> 
> In matters of style such as this there *are* only opinions. I don't
> think there are definite grounds for preferring either one.

Opinions are what I'd like to see, because most of you have bigger 
experience than me. maybe this example is too trivial for that ... ;-)

 
> If you were to propose such a patch on the python-dev list,

Oh no, I didn't think that

thanks,

bye
Fabio


From bjourne at gmail.com  Mon Aug 13 07:10:28 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Mon, 13 Aug 2007 13:10:28 +0200
Subject: decorators - more than just syntactic sugar
In-Reply-To: <46be005e$0$13866$ba620e4c@news.skynet.be>
References: <46be005e$0$13866$ba620e4c@news.skynet.be>
Message-ID: <740c3aec0708130410h72f057ffy70db3cc447aa36e@mail.gmail.com>

On 8/11/07, Helmut Jarausch <jarausch at skynet.be> wrote:
> How can I find out the predefined decorators?

There are two in the standard library, @classmethod for declaring
class methods and @staticmethod for declaring static methods. They are
listed at the built ins page
http://docs.python.org/dev/lib/built-in-funcs.html, unpedagogically
not separated from ordinary functions.


-- 
mvh Bj?rn


From bignose+hates-spam at benfinney.id.au  Wed Aug  8 06:57:58 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 08 Aug 2007 20:57:58 +1000
Subject: Seek the one billionth line in a file containing 3 billion lines.
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
	<7xzm12o7o7.fsf@ruckus.brouhaha.com>
	<1186555297.877273.40540@o61g2000hsh.googlegroups.com>
Message-ID: <874pja70p5.fsf@benfinney.id.au>

Sullivan WxPyQtKinter <sullivanz.pku at gmail.com> writes:

> On Aug 8, 2:35 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> > Sullivan WxPyQtKinter <sullivanz.... at gmail.com> writes:
> > > This program:
> > > for i in range(1000000000):
> > >       f.readline()
> > > is absolutely every slow....
> >
> > There are two problems:
> >
> >  1) range(1000000000) builds a list of a billion elements in memory
[...]
> >
> >  2) f.readline() reads an entire line of input
[...]
> 
> Thank you for pointing out these two problem. I wrote this program
> just to say that how inefficient it is to use a seemingly NATIVE way
> to seek a such a big file. No other intention........

The native way isn't iterating over 'range(hugenum)', it's to use an
iterator. Python file objects are iterable, only reading eaach line as
needed and not creating a companion list.

    logfile = open("foo.log", 'r')
    for line in logfile:
        do_stuff(line)

This at least avoids the 'range' issue.

To know when we've reached a particular line, use 'enumerate' to
number each item as it comes out of the iterator.

    logfile = open("foo.log", 'r')
    target_line_num = 10**9
    for (line_num, line) in enumerate(file):
        if line_num < target_line_num:
            continue
        else:
            do_stuff(line)
            break

As for reading each line: that's unavoidable if you want a specific
line from a stream of variable-length lines.

-- 
 \      "I have never made but one prayer to God, a very short one: 'O |
  `\       Lord, make my enemies ridiculous!' And God granted it."  -- |
_o__)                                                         Voltaire |
Ben Finney


From nick at craig-wood.com  Mon Aug 20 11:30:10 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 20 Aug 2007 10:30:10 -0500
Subject: Python equivalent of Perl's $/
References: <mailman.9.1187619031.26576.python-list@python.org>
Message-ID: <slrnfcjcqq.557.nick@irishsea.home.craig-wood.com>

John K Masters <johnmasters at oxtedonline.net> wrote:
>  I am currently working my way through Jeffrey Friedl's book Mastering
>  Regular Expressions. Great book apart from the fact it uses Perl for the
>  examples.
> 
>  One particular expression that interests me is '$/ = ".\n"' which,
>  rather than splitting a file into lines, splits on a period-newline
>  boundary. Combined with Perl's 'while (<>)' construct this seems a great
>  way to process the files I am interested in.
> 
>  Without wishing to start a flame war, is there a way to do this in Python?
> 
>  Regards, John

Something like this maybe?

import re

input_data = """I am currently working my way through Jeffrey Friedl's book Mastering
Regular Expressions. Great book apart from the fact it uses Perl for the
examples.

One particular expression that interests me is '$/ = ".\\n"' which,
rather than splitting a file into lines, splits on a period-newline
boundary. Combined with Perl's 'while (<>)' construct this seems a great
way to process the files I am interested in.

Without wishing to start a flame war, is there a way to do this in Python?
"""

for para in re.split(r"\.\n", input_data):
    print "para = %r" % para

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


From claird at lairds.us  Fri Aug  3 09:48:10 2007
From: claird at lairds.us (Cameron Laird)
Date: Fri, 3 Aug 2007 13:48:10 +0000
Subject: Best way to capture output from an exec'ed (or such) script?
References: <1186084086.212050.264270@q3g2000prf.googlegroups.com>
	<mailman.1547.1186097565.22759.python-list@python.org>
Message-ID: <q9obo4-v3b.ln1@lairds.us>

In article <mailman.1547.1186097565.22759.python-list at python.org>,
Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>En Thu, 02 Aug 2007 16:48:06 -0300, <exscape at gmail.com> escribi?:
>
>> In any case. I've added some minor scripting support, so that you can
>> write dynamic pages in Python. To do this, I use execfile(), and pass
>> the script a dictionary with some basic variables. The script then
>> sets a "ret" variable that's sent back to the browser. That's some
>> major ugliness right there! If I do a "print" inside the script, then
>> it'll end up on the server console. I want it to end up in the web
>> browser.
>
>If `print` were a function, this would be easy: just provide a replacement  
>into the dictionary you pass to the script. But print is a statement, and  
>this becomes a bit harder.
>
>If your web server only processes a single request at a time, you can  
>replace sys.stdout (and perhaps sys.stderr) with a suitable object having  
>a write() function: a true open file, or a StringIO instance, or even a  
>custom object that collects "printed" lines into a list.
>
>If your web server is multithreaded (or you use some other way to process  
>many simultaneous requests) you have to be more careful - remember that  
>sys.stdout is global, you must find a way to distinguish between output  
> from different processes all going into the same collector.
			.
			.
			.
While we're on the subject of Web servers so small
as to be educational, I'll recommend <URL:
http://www.ibm.com/developerworks/web/library/wa-ltwebserv/ >.


From iapain at gmail.com  Mon Aug 27 13:21:07 2007
From: iapain at gmail.com (iapain)
Date: Mon, 27 Aug 2007 17:21:07 -0000
Subject: sorting a list of lists
In-Reply-To: <1188233798.684136.263640@22g2000hsm.googlegroups.com>
References: <1188233798.684136.263640@22g2000hsm.googlegroups.com>
Message-ID: <1188235267.790442.193830@q5g2000prf.googlegroups.com>

> i would like to sort a list of lists. The list is first sorted on the
> second item in the sub-lists (which I can do), then on the third item
> (which I can't).

Write a comparator instead of dirty hacks

mylistoflist.sort(mycomparator)

def mycomparator(a, b):
  #do




From zentraders at gmail.com  Mon Aug  6 15:48:31 2007
From: zentraders at gmail.com (Zentrader)
Date: Mon, 06 Aug 2007 12:48:31 -0700
Subject: is it possible to improve traceback messages ?
In-Reply-To: <mailman.1686.1186422892.22759.python-list@python.org>
References: <46B75F9E.5020309@mailbox.kun.nl>
	<mailman.1686.1186422892.22759.python-list@python.org>
Message-ID: <1186429711.511166.140780@i38g2000prf.googlegroups.com>

On Aug 6, 10:54 am, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/6/07, Stef Mientki <S.Mientki-nos... at mailbox.kun.nl> wrote:
>
>
>
> > hello,
>
> > Most of time I get an error message, it is sufficient to solve to problem.
> > Sometimes it's not clear to me what the problem is
> > like this one:
>
> >      N = int (log10(self.Value)) + 1
> > TypeError: int() argument must be a string or a number
>
> > In order to solve it, in general I put some print statements,
> > before the line with the problem,
> > printing values and types of all variables.
>
> > I think it would be much more convenient,
> > if the traceback or error exception ( don't know how it works exactly),
> > would print the type and value of all variables and constants used in the last line.
>
> > Can this be done (in a easy way).
>
> See the cgitb module.

This is the "standard" way AFAIK
.try :
.   some_process
.except :
.   import trackback, sys
.   et, ev, tb = sys.exc_info()
.   while tb :
.        co = tb.tb_frame.f_code
.        print "Filename = " + str(co.co_filename)
.        print  "Error Line # = " + str(traceback.tb_lineno(tb))
.        tb = tb.tb_next
.   print "error type = ", et
.   print "error var name  = ", ev



From S.Mientki-nospam at mailbox.kun.nl  Thu Aug  2 17:47:49 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Thu, 02 Aug 2007 23:47:49 +0200
Subject: (no) fast boolean evaluation ?
Message-ID: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>

hello,

I discovered that boolean evaluation in Python is done "fast"
(as soon as the condition is ok, the rest of the expression is ignored).

Is this standard behavior or is there a compiler switch to turn it on/off ?

thanks,
Stef Mientki


From ArarghMail708NOSPAM at NOT.AT.Arargh.com  Thu Aug 30 17:26:19 2007
From: ArarghMail708NOSPAM at NOT.AT.Arargh.com (ArarghMail708NOSPAM at NOT.AT.Arargh.com)
Date: Thu, 30 Aug 2007 16:26:19 -0500
Subject: Important Research Project
References: <13ddcvm1bsu3s94@corp.supernews.com> <46D6CA0E.E66ED5C8@yahoo.com>
Message-ID: <0dded397gquvo23fjvjfta1131evcb4or0@4ax.com>

On Thu, 30 Aug 2007 09:45:50 -0400, CBFalconer <cbfalconer at yahoo.com>
wrote:

>"E.D.G." wrote:
>> 
>> This report is being posted to a number of Internet Newsgroups to
>> see if there are any experienced computer programmers who would
>> like to provide some assistance with an effort to develop a Perl
>> language computer program.
>
>Where is Perl described in the C standard?  This seems rather OT.
>
A little OT for basic groups, too.  Followups set.

Fortran group dropped, too.
-- 
ArarghMail708 at [drop the 'http://www.' from ->] http://www.arargh.com
BCET Basic Compiler Page: http://www.arargh.com/basic/index.html

To reply by email, remove the extra stuff from the reply address.


From google at mrabarnett.plus.com  Thu Aug  9 20:39:23 2007
From: google at mrabarnett.plus.com (MRAB)
Date: Thu, 09 Aug 2007 17:39:23 -0700
Subject: Threaded Design Question
In-Reply-To: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
References: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
Message-ID: <1186706363.947909.185460@e9g2000prf.googlegroups.com>

On Aug 9, 7:25 pm, half.ital... at gmail.com wrote:
> Hi all!  I'm implementing one of my first multithreaded apps, and have
> gotten to a point where I think I'm going off track from a standard
> idiom.  Wondering if anyone can point me in the right direction.
>
> The script will run as a daemon and watch a given directory for new
> files.  Once it determines that a file has finished moving into the
> watch folder, it will kick off a process on one of the files.  Several
> of these could be running at any given time up to a max number of
> threads.
>
> Here's how I have it designed so far.  The main thread starts a
> Watch(threading.Thread) class that loops and searches a directory for
> files.  It has been passed a Queue.Queue() object (watch_queue), and
> as it finds new files in the watch folder, it adds the file name to
> the queue.
>
> The main thread then grabs an item off the watch_queue, and kicks off
> processing on that file using another class Worker(threading.thread).
>
> My problem is with communicating between the threads as to which files
> are currently processing, or are already present in the watch_queue so
> that the Watch thread does not continuously add unneeded files to the
> watch_queue to be processed.  For example...Watch() finds a file to be
> processed and adds it to the queue.  The main thread sees the file on
> the queue and pops it off and begins processing.  Now the file has
> been removed from the watch_queue, and Watch() thread has no way of
> knowing that the other Worker() thread is processing it, and shouldn't
> pick it up again.  So it will see the file as new and add it to the
> queue again.  PS.. The file is deleted from the watch folder after it
> has finished processing, so that's how i'll know which files to
> process in the long term.
>
I would suggest something like the following in the watch thread:

seen_files = {}

while True:
	# look for new files
	for name in os.listdir(folder):
		if name not in seen_files:
			process_queue.add(name)
		seen_files[name] = True

	# forget any missing files and mark the others as not seen, ready for
next time
	seen_files = dict((name, False) for name, seen in seen_files.items()
if seen)

	time.sleep(1)



From i3dmaster at gmail.com  Tue Aug 14 12:42:52 2007
From: i3dmaster at gmail.com (i3dmaster)
Date: Tue, 14 Aug 2007 09:42:52 -0700
Subject: Simple python iteration question
In-Reply-To: <1187108787.998690.37500@q3g2000prf.googlegroups.com>
References: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
	<1187108787.998690.37500@q3g2000prf.googlegroups.com>
Message-ID: <9DBE382C-73FD-4EEC-88CA-AA7B7983ADC7@gmail.com>

or use its builtin enumerate function:

for i, j in enumerate(list):
     print i, j

--Jim

On Aug 14, 2007, at 9:26 AM, danmcleran at yahoo.com wrote:

> On Aug 14, 10:22 am, Bryan <b... at bcc.com> wrote:
>> Hi,
>>
>> I just started with python, and have a for loop question
>>
>> In c++ (or a number of other languages) I can do this:
>>
>> for (int i=0, j=0; i < i_len, j< j_len; ++i, ++j) {}
>>
>> If I have this in python:
>> l = ['a', 'b', 'c']
>>
>> I want to get the value and also an iterator:
>> for i,v in len(l), l:
>>         print v
>>         print i
>>
>> Or something like this without declaring the iterator outside my  
>> loop...
>>
>> How do I do this?
>> Thanks!
>
> this will get index and item at index,
>
> for i in range(0, len(l)):
>     print i
>     print l[i]
>
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From ptmcg at austin.rr.com  Wed Aug  1 23:43:12 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 01 Aug 2007 20:43:12 -0700
Subject: Extending Python by Adding Keywords & Data types
In-Reply-To: <1185973687.883520.227540@k79g2000hse.googlegroups.com>
References: <1185913739.879602.212950@w3g2000hsg.googlegroups.com>
	<1185973687.883520.227540@k79g2000hse.googlegroups.com>
Message-ID: <1186026192.659767.306960@d55g2000hsg.googlegroups.com>

On Aug 1, 8:08 am, Paul McGuire <pt... at austin.rr.com> wrote:
>
>     def add(self,other):
>         if len(self.contents) < self.capacity:
>             self.contents.append( other )
>         else:
>             raise ValueError("can't add any more to this Box")
>

I guess that really should raise an OverflowError...

-- Paul



From ptmcg at austin.rr.com  Thu Aug 16 22:01:53 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Thu, 16 Aug 2007 19:01:53 -0700
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187314114.873306.187500@e9g2000prf.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<1187314114.873306.187500@e9g2000prf.googlegroups.com>
Message-ID: <1187316113.424465.34650@19g2000hsx.googlegroups.com>

On Aug 16, 8:28 pm, Jonathan Gardner
<jgardner.jonathangardner.... at gmail.com> wrote:
> On Aug 16, 3:35 pm, beginner <zyzhu2... at gmail.com> wrote:
>
>
>
> > In perl it is just one line: $a=$b->{"A"} ||={}.
>
> a = b.setdefault('A', {})
>
> This combines all two actions together:
> - Sets b['A'] to {} if it is not already defined
> - Assigns b['A'] to a
>
> More info on dict methods here:
>
> http://docs.python.org/lib/typesmapping.html

No, this has already been proposed and discarded.  The OP does NOT
want this, because it always generates an empty {} whether it is
needed or not.  Not really a big hardship, but if the default value
were some expensive-to-construct container class, then you would be
creating one every time you wanted to reference a value, on the chance
that the key did not exist.

Carl Banks' post using defaultdict is the correct solution.  The
raison d'etre for defaultdict, and the reason that it is the solution
to the OP's question, is that instead of creating a just-in-case
default value every time, the defaultdict itself is constructed with a
factory method of some kind (in practice, it appears that this factory
method is usually the list or dict class constructor).  If a reference
to the defaultdict gives a not-yet-existing key, then the factory
method is called to construct the new value, that value is stored in
the dict with the given key, and the value is passed back to the
caller.  No instances are created unless they are truly required for
initializing an entry for a never-before-seen key.

-- Paul



From bjourne at gmail.com  Wed Aug 29 06:32:21 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Wed, 29 Aug 2007 12:32:21 +0200
Subject: advice about `correct' use of decorator
In-Reply-To: <op.txjpo7ixx6zn5v@gabriel2.softlabbsas.com.ar>
References: <46C4B097.4080309@fmed.uba.ar>
	<740c3aec0708170529s6f7e7fe2l8c92771c2d0a51d4@mail.gmail.com>
	<46C5C9AE.5020508@fmed.uba.ar>
	<mailman.112.1187787625.32294.python-list@python.org>
	<1187792001.935204.42330@e9g2000prf.googlegroups.com>
	<740c3aec0708230520h6a92a29ar180efed41730f563@mail.gmail.com>
	<op.txjpo7ixx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <740c3aec0708290332k3c125d9el16250939e22ea8c4@mail.gmail.com>

On 8/24/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
> En Thu, 23 Aug 2007 09:20:21 -0300, BJ?rn Lindqvist <bjourne at gmail.com>
> escribi?:
>
> > def check_user_logged_in(func):
> >     def f(*args, **kwargs):
> >         if global_state.the_user.is_logged_in:
> >             return func(*args, **kwargs)
> >         return show_login_page()
> >     return f
>
> I think there is a semantic problem, perhaps we are not talking
> about the same thing. I'm considering the software complexity AS
> PERCEIVED BY THE PROGRAMMER, looking at the interactions between a
> program and a programmer who is working on some task; some people
> would say "cognitive complexity" to make it clear.

There is no semantic problem. You are just mistaken in your belief
that the complexity that the user of the decorator has to deal with is
different from the complexity in implementing the decorator.

> Which API is more complex: one in which you can play a movie with
> just a single call like PlayMovie(Title), or one on which you must
> call a zillion functions to firtly initialize the stream format,
> configure the display, disable undesired user interfase elements,
> locate the movie file, load it in chunks, etc.? The first one is
> certainly much simpler to use (simpler = less complex), and maybe
> internally it calls the same functions as the second one, but nobody
> cares.

"nobody cares" is your guess. I'd bet that the caller of the PlayMovie
function cares a lot: Is the movie played full screened? Which
encodings are supported? Can you set the title of the movie window? Is
streaming supported? Does it even work on windows? Which URI schemes
does it support?  And so on and so on.

That is why no video decoding API:s have a PlayMovie(Title) function
and why I haven't seen a single 3d engine with a
MakeReallyCoolDoomCloneFPSGame() function.

"hiding details" only works if the client programmer really doesn't
care about the details.

> Back to your example, the fact that a decorator builds a higher order
> function, does NOT make it more complex - because the programmer does not
> see that. In fact, hiding the details makes it simpler.

Yes, the programmer does see that. The example decorator I posted
requires about a zillion preconditions to work correctly and will fail
in weird ways when those preconditions are not satisfied. The
programmer is interested in the crazy failures he or she will
experience. I dare you to try and implementing the code both as a
decorator and as a function, then write the unit tests and
documentation. The complexity of those three items together
(implementation + tests + documentation) will be much higher for the
decorator choice because the complexity of the decorator
implementation is a bit higher than using a plain old function.

Note also that it is extremely rare to see well-documented or
well-tested code, which means that the programmer WILL have to analyze
the implementation which means that implementation complexity matters
a lot.


-- 
mvh Bj?rn

From steveo at syslang.net  Tue Aug 14 21:44:17 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Tue, 14 Aug 2007 21:44:17 -0400 (EDT)
Subject: Retry: Question about FutureWarning
Message-ID: <alpine.LFD.0.999.0708142137550.22214@saturn.syslang.net>

I'm trying again, since no response indicates that I'm not providing 
enough info.

I have module M1 which has the following line in it:

    StartTime   = safe_dict_get ( dic, 'starttime', 0xFFFFFFFF )

It gets imported by modules M2 and M3. And finally, M4 imports both M2 and
M3. So the idea is that in total we have 4 files called M1.py M2.py M3.py 
and M4.py

M4
   |\M3
   | |\M1
   |\M2
   | |\M1

I need to compile the python modules as part of the package building 
process.

The shell compile command I use to generate both the .pyc and the .pyo 
files is:

python=/usr/bin/python2.3
i_python ()
{
      $python -c "import $1"
      $python -O -c "import $1"
}
i_python M1
i_python M2
i_python M3
i_python M4

When M1 is compiled, there's no problem. The same for when I compile M2
and M3. But when M4 is compiled, I get the following message:

M1.py:268: FutureWarning: hex/oct constants > sys.maxint will
return positive values in Python 2.4 and up
    StartTime   = safe_dict_get ( dic, 'starttime', 0xFFFFFFFF )

I get the message twice, ostensibly because of M3 and M2 both being 
imported into M1

I was able to shut off the warning by adding the following lines *before*
the import of M2 and M3 in M4:

import warnings
warnings.filterwarnings('ignore', category=FutureWarning)

My question is this: Why can the warning not be shut off by putting the
two lines in M1 where the reference exists to 0xFFFFFFFF ?

I'm just leary of fixing warnings by looking for ways to shut them off.

Also, do I need to supply any more information?

Thanks for your patience.

--
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From robert.kern at gmail.com  Sun Aug 12 19:02:04 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sun, 12 Aug 2007 18:02:04 -0500
Subject: Python not freeing memory (?)
In-Reply-To: <loom.20070812T224243-317@post.gmane.org>
References: <loom.20070812T224243-317@post.gmane.org>
Message-ID: <f9o3hn$td$1@sea.gmane.org>

Chris wrote:
> I have a Bayesian simulation package that keeps running into memory 
> allocation problems. I have a feeling this has something to do with 
> Python (2.5.1.1) not freeing memory. The program essentially 
> iterates n times, each time proposing new arrays (numpy) of values 
> that are evaluated using statistical likelihoods. All variables in 
> the loop are re-assigned at each iteration, so there should not be 
> a leak. Nevertheless, at approximately the same iteration every 
> time, I run into malloc errors:

There might be a bug in numpy. It's unlikely that the bug is in Python. Let's
bring it over to numpy-discussion. What version of numpy are you using? Can you
give us a complete example that demonstrates the leak?

-- 
Robert Kern

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



From andmart at gmail.com  Fri Aug  3 08:37:05 2007
From: andmart at gmail.com (=?ISO-8859-1?Q?Andr=E9_Martins?=)
Date: Fri, 3 Aug 2007 09:37:05 -0300
Subject: How to create python script which can create csv we file with
	relationship
In-Reply-To: <1186141530.243539.6370@q75g2000hsh.googlegroups.com>
References: <1186141530.243539.6370@q75g2000hsh.googlegroups.com>
Message-ID: <bfc796de0708030537l67cc4a2clf866bba5dc60dd1c@mail.gmail.com>

http://docs.python.org/lib/module-csv.html

2007/8/3, Sonu <patelkundan at gmail.com>:
>
> hello,
> i need to create script
> that can create a csv file as i want
> for example i have two table in database that are person ,country
> if i want to create csv file to person,then wht to do ,,
> how to connect database,how to create csv of interrelated field
> eg :in person table :country_id (which is primary key of country table)
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
[]'s
Andr? Martins
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From jgodoy at gmail.com  Sun Aug 12 16:42:52 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 12 Aug 2007 17:42:52 -0300
Subject: Web based Reporting tool for Python
References: <1186460956.945148.162610@k79g2000hse.googlegroups.com>
	<mailman.1722.1186522221.22759.python-list@python.org>
	<1186547726.383996.291360@d55g2000hsg.googlegroups.com>
	<2007080808575016807-jon@turnthepageorg>
	<1186891194.582444.222010@r34g2000hsd.googlegroups.com>
	<mailman.1871.1186916944.22759.python-list@python.org>
	<2007081212120450073-jon@turnthepageorg>
Message-ID: <iv74p4-b2f.ln1@strongwill.g2ctech>

Jon Rosebaugh wrote:
> Sure, but again, these aren't reporting engines; they're just template
> engines. And I don't think any of the web template engines have PDF
> output.

I generate my PDFs with Genshi / Kid and ReportLab.  For the markup
processing I use z3c.rml.

Works flawlessly.


From zzbbaadd at aol.com  Thu Aug 30 15:24:25 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Thu, 30 Aug 2007 12:24:25 -0700
Subject: subclassing Python types
In-Reply-To: <46d717f5$0$30367$9b4e6d93@newsspool4.arcor-online.net>
References: <1188500442.434722.157350@q5g2000prf.googlegroups.com>
	<46d717f5$0$30367$9b4e6d93@newsspool4.arcor-online.net>
Message-ID: <1188501865.541186.272290@e9g2000prf.googlegroups.com>

On Aug 30, 12:18 pm, Wildemar Wildenburger
<lasses_w... at klapptsowieso.net> wrote:
> zzbba... at aol.com wrote:
> > I have read that you can derive from the base classes such as str,
> > list, dict.
>
> > I guess this would look like:
>
> > def MyString(str):
> > def MyList(list):
> > def MyDict(dict):
>
> Well, replace 'def' with 'class' and you're right.
>
> > How do you access the data that is contained in the super class?
>
> This way:
>  >>> class MyList(list):
> ...    def do_something(self):
> ...       self.append(3)
> ...       print self
> ...
>  >>> l = MyList((1, 2))
>  >>> l
> [1, 2]
>  >>> l.do_something()
> [1, 2, 3]
>
> That is: Whenever you want to refer to the value refer to self (that is,
> refer to the instance of your class).
>
> /W

Ok, thanks.

So it's:
class MyString(str):
   def __init__(self,strInput):
      self = strInput



From rdm at rcblue.com  Sun Aug 12 21:28:29 2007
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 12 Aug 2007 18:28:29 -0700
Subject: Binary, Hex, and Decimal string conversions
In-Reply-To: <496954360708121620r4dd68ac9o430326ae8c8ae04d@mail.gmail.co
 m>
References: <496954360708111559s1cef4212pabd14e95b27435ea@mail.gmail.com>
	<C5FFAC23-F5DC-4112-A508-EC9BDF2FAB43@jedimindworks.com>
	<496954360708121620r4dd68ac9o430326ae8c8ae04d@mail.gmail.com>
Message-ID: <20070813013344.2A7A41E4013@bag.python.org>

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From tjollans at googlemail.com  Wed Aug 15 04:40:26 2007
From: tjollans at googlemail.com (stef mientki)
Date: Wed, 15 Aug 2007 10:40:26 +0200
Subject: buggie in else syntax ?
In-Reply-To: <200708150138.57816.thomas@jollans.com>
References: <46C21D70.8000409@gmail.com>
	<200708150138.57816.thomas@jollans.com>
Message-ID: <46C2BBFA.7040001@gmail.com>

Thomas Jollans wrote:
> On Tuesday 14 August 2007, stef mientki wrote:
>   
>> hello,
>>
>> I've the idea that the "else" syntax is not always handled correctly,
>> or I'm overlooking something.
>>
>> This pieces of code are automatic translation from another language,
>> sometimes it works, sometimes it doesn't ???
>>
>> This piece of code works nice:
>>
>>     a = 2
>>
>>     def JSM (line_nr):
>>           print line_nr
>>
>>     if a>3:
>>         print 'asddas'
>>     else: JSM(230) ; \        <== this is the problem line, that's ok here
>>         print 'aaps'
>>
>> While this piece of code gives a syntax error:
>>
>>     #Function button_antidender(bit in pin,sbyte in out
>>     Button_Counter_Temp,byte in demp) return bit is
>>     def button_antidender ( pin, button_counter_temp, demp ):
>>          #serial_hw_write(counter)
>>         Serial_HW_Write ( button_counter_temp )                 ;JSM(226)
>>         if JSM(227) and (   button_counter_temp >= 0 ):
>>             if JSM(228) and (  pin == on ):
>>                 button_counter_temp =  button_counter_temp  +  1
>>     ;JSM(229)
>>             else: JSM(230) ;
>>     \                                                <=== SYNTAX ERROR
>>     
>
> is there a newline before the backslash ? Or a space after the backslash but 
> before the newline ?
>
>   
I investigated this some further in a hex editor,
and indeed sometimes there's a space,
ok that's my stupid mistake.

But I found a situation that also in the very simple example always 
gives a syntax error

    a = 2
    b = 5

    def JSM (line_nr):
        print line_nr

    if a>3:
        print 'asddas'
    else: JSM(230) ; \
        if b>3:              <== SYNTAX ERROR pointing to the "f" of if
            print 'bbbbb'
        else:
            print 'ccccc'
        print 'aaps'

And I don't see the syntax error.
And if you're interested in the hex file data:
  65 6C 73 65 3A 20 4A 53 4D 28 32 33 30 29 20 3B 20 5C 0D 0A

btw, I now split the else line over more than 1 line, and everything is 
perfect.

thanks,
Stef Mientki



From as at hut.at  Wed Aug 29 08:32:49 2007
From: as at hut.at (hyena)
Date: Wed, 29 Aug 2007 14:32:49 +0200
Subject: handling tabular data in python--newbie question
Message-ID: <6cf42$46d56771$839b8704$5034@news1.tudelft.nl>

Hi,
  Just jump in python few days. I am wondering how to store and index a 
table in python effectively and easily.I think the basic data types are not 
very straight foward to handle a table (eg, from csv or data base.)

  I have a csv file, the first row of it is column names and the rest rows 
are data. There are some tens of columns and hundreds rows in the file. I am 
planning to use the column names as variables to access data, currently I am 
thinking of using a dictionary to store this file but did not figure out a 
elegant way to start.

  Any comments and suggestions are wellcomed. Please forgive me if this 
question is too naive , and yes, I did search google  a while but did not 
find what I want.

Thanks 




From cousinstanley at gmail.com  Sat Aug  4 22:53:05 2007
From: cousinstanley at gmail.com (Cousin Stanley)
Date: Sat, 04 Aug 2007 21:53:05 -0500
Subject: Efficient Rank Ordering of Nested Lists
References: <1186104049.022836.253470@e9g2000prf.googlegroups.com>
	<1i29gpw.1vh7eku1iauistN%aleax@mac.com>
	<1186279182_8217@sp12lax.superfeed.net>
	<1i2c5qo.ynsani1aobwaN%aleax@mac.com>
Message-ID: <1186282385_8239@sp12lax.superfeed.net>


> Cousin Stanley <cousinstanley at gmail.com> wrote:
>    ...
>>       for i , item in reversed( enumerate( sorted( single_list ) ) ) :
>    ...
>> TypeError: argument to reversed() must be a sequence
>
> Oops, right.  Well then,
>
>     aux_seq = list(enumerate(sorted(single_list)))
>     for i, item in reversed(aux_seq): ...

Alex .... 

  That fixed it. 

  Thanks ....


-- 
Stanley C. Kitching
Human Being
Phoenix, Arizona


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


From gnewsg at gmail.com  Wed Aug 22 15:09:58 2007
From: gnewsg at gmail.com (billiejoex)
Date: Wed, 22 Aug 2007 12:09:58 -0700
Subject: Impersonate another user temporarily (Unix and Windows)
Message-ID: <1187809798.274511.230240@z24g2000prh.googlegroups.com>

Hi there. I'm writing a modification for a FTP server library I'm
maintaining.
Depending on the system I'd want to temporarily impersonate the logged
user to perform actions on filesystem.
Something like:

try:
    change_user('user', 'password')
    os.rmdir('dir')
except:
    print "some error"
finally:
    change_user('old_user', 'password')

On Unix I took at look at os.seteuid() and os.setegid() functions and
I noticed they could be useful for my purpose.
On Windows I have no idea about how could I emulate a similar
behaviour.
Could someone please point me in the right direction?


Thanks in advance



From jarausch at skynet.be  Mon Aug 13 10:18:15 2007
From: jarausch at skynet.be (Helmut Jarausch)
Date: Mon, 13 Aug 2007 16:18:15 +0200
Subject: Drawing a graph
In-Reply-To: <mailman.1917.1187012829.22759.python-list@python.org>
References: <mailman.1917.1187012829.22759.python-list@python.org>
Message-ID: <46C06827.9060804@skynet.be>

Ghirai wrote:
> Hello list,
> 
> I need to draw a graph, 2 axes, 2D, nothing fancy.
> One of the axes is time, the other one is a series of integers.
> 
> I don't care much about the output format.
> 
> Are there any specialized libraries for this, or should i use PIL?
> 

What about Gnuplot.py
http://gnuplot-py.sourceforge.net/


-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From oliver-at-hallmarkins.net  Thu Aug 16 18:26:14 2007
From: oliver-at-hallmarkins.net (Oliver Nelson)
Date: Thu, 16 Aug 2007 15:26:14 -0700
Subject: Canceling events from COM Objects
Message-ID: <46c4cf1c$0$17203$39cecf19@news.twtelecom.net>

I have MapPoint working in Python, and I'm trying to cancel events on 
the map, but I can't seem to make that happen.  I'm responding to the 
events successfully in my panel object.  My code is like this:

global MapPointMod
MapPointMod = 
win32com.client.gencache.EnsureModule("{51C0A9CA-F7B7-4F5A-96F4-43927C6FA50F}", 
0, 1, 0)

class MyPanel(wx.Panel):
     def __init__(self, *args, **kwds):
         # begin wxGlade: MyPanel.__init__
         kwds["style"] = wx.TAB_TRAVERSAL
         wx.Panel.__init__(self, *args, **kwds)
         self.frame = args[0]

         MyMap = MakeActiveXClass(MapPointMod.MappointControl, 
eventObj=self)
         self.window_1 = MyMap(self, -1)
         self.window_1.OpenMap("C:\\TEMP\\GPS_ON.ptt")
...
...
     def OnBeforeClick(self, Button, Shift, X, Y, Cancel):
         print "tada"


My event fires just fine, but I can't seem to figure out how to cancel 
the event so that mappoint doesn't do its stuff with it...I've tried 
setting Cancel based on the mappoint specs, but it doesn't seem to get 
sent back anywhere...

Any ideas please?

Thanx,

OLIVER


From hniksic at xemacs.org  Fri Aug 31 07:06:00 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Fri, 31 Aug 2007 13:06:00 +0200
Subject: Registering a python function in C
References: <1188508874.879215.319400@i13g2000prf.googlegroups.com>
Message-ID: <87y7fsq7zb.fsf@mulj.homelinux.net>

fernando <fernandofariajunior at gmail.com> writes:

> Could someone post an example on how to register a python function as
> a callback in a C function?

If I understand correctly, your C function receives a Python function
(as a function object of type PyObject *), which you need to call from
C.  To do that, call PyObject_CallFunction(obj, format, args...) where
format and args are documented in
http://docs.python.org/api/arg-parsing.html.

Does that help?

Also note that there is a dedicated mailing list for the Python/C
API; see http://mail.python.org/mailman/listinfo/capi-sig .


From basilisk96 at gmail.com  Tue Aug 21 22:39:45 2007
From: basilisk96 at gmail.com (Basilisk96)
Date: Wed, 22 Aug 2007 02:39:45 -0000
Subject: How to optimise this code?
In-Reply-To: <faf33r$rb8$01$1@news.t-online.com>
References: <mailman.68.1187711977.32294.python-list@python.org>
	<faf33r$rb8$01$1@news.t-online.com>
Message-ID: <1187750385.511936.318560@i13g2000prf.googlegroups.com>

David,

If your true design intent is to run X number of test cases, unittest
is the biggest bang for your buck, like shown by Peter's example. You
just subclass unittest.TestCase, and def your test methods in the
class body; they will simply be executed in the order you list them.
It's just nice how it works that way.

Otherwise, the function factory approach like Hrvoje's
   functionToCall = getattr(self, "testCase%s" % tc)
is the best optimization.

Cheers,
-Basilisk96



From happyriding at yahoo.com  Sun Aug 19 02:07:38 2007
From: happyriding at yahoo.com (happyriding)
Date: Sat, 18 Aug 2007 23:07:38 -0700
Subject: Understanding closures
In-Reply-To: <1187499818.125192.12930@m37g2000prh.googlegroups.com>
References: <1187499818.125192.12930@m37g2000prh.googlegroups.com>
Message-ID: <1187503658.855745.263390@d55g2000hsg.googlegroups.com>

On Aug 18, 11:03 pm, Ramashish Baranwal <ramashish.li... at gmail.com>
wrote:
> Hi,
>
> I want to use variables passed to a function in an inner defined
> function. Something like-
>
> def fun1(method=None):
>     def fun2():
>         if not method: method = 'GET'
>         print '%s: this is fun2' % method
>         return
>     fun2()
>
> fun1()
>
> However I get this error-
> UnboundLocalError: local variable 'method' referenced before
> assignment
>
> This however works fine.
>
> def fun1(method=None):
>     if not method: method = 'GET'
>     def fun2():
>         print '%s: this is fun2' % method
>         return
>     fun2()
>
> fun1()
>
> Is there a simple way I can pass on the variables passed to the outer
> function to the inner one without having to use or refer them in the
> outer function?
>
> Thanks,
> Ramashish

This works error free:


def fun1(x=None):
    y = 10
    def fun2():
        print x
        if not x: method = 'GET'
        print '%s: this is fun2' % method
    fun2()
fun1()


Python reads x from the fun1 scope. But the following produces an
error for the print x line:

def fun1(x=None):
    y = 10
    def fun2():
        print x
        if not x: x = 'GET'    #CHANGED THIS LINE
        print '%s: this is fun2' % method
    fun2()
fun1()

Traceback (most recent call last):
  File "3pythontest.py", line 8, in ?
    fun1()
  File "3pythontest.py", line 7, in fun1
    fun2()
  File "3pythontest.py", line 4, in fun2
    print x
UnboundLocalError: local variable 'x' referenced before assignment


It's as if python sees the assignment to x and suddenly decides that
the x it was reading from the fun1 scope is the wrong x.  Apparently,
the assignment to x serves to insert x in the local scope, which makes
the reference to x a few lines earlier an error.



From tjreedy at udel.edu  Thu Aug  2 14:24:22 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 2 Aug 2007 14:24:22 -0400
Subject: python 3.0, pywin32 and scipy
References: <1186070475.659511.24130@q3g2000prf.googlegroups.com>
Message-ID: <f8t7gk$f8r$1@sea.gmane.org>


"vml" <victor.lebrun at gmail.com> wrote in message 
news:1186070475.659511.24130 at q3g2000prf.googlegroups.com...
| I am trying to promote python in my job, my collegue only see matlab
| and microsoft scripting language.
| I understood that there willl be no backward compatibility between
| python 2.x and 3.0, does it means that:

Most of the basic language and syntax will be unchanged.  Many to most of 
the new features will be introduced in 2.6 also so you can add their usage 
gradually, as needed, without converting everything.  Most of the 
incompatibilities between 2.6+ and 3.0+ will be handled by 2to3.py.

| - my script using pywin32 for the COM layer and scipy for the maths
| won't work under 3.0
| - will we have the equivalent of pywin32 and scipy in python ?

As with all 3rd party addons, that will depend on the authors or author 
groups.  The same is true today for every new release, especially in 
regards to Windows binaries.

| I will be incharge of designing a python module which will be a
| 'matrix calculator' in our current software. Will it be compatible
| with python 3.0 ? I guess no.

But you will be able to use it *and distribute it* with Python2.5 
indefinitely.  Some people still run 1.5.2 code with the nearly decade old 
1.5.2 interpreter.  And I expect that there will be people running 2.5 code 
with Py2.5 a decade or more from now.

The PSF still distributes versions back to about the first.  Compare this 
with Microsoft pulling from distrubution the free version of VC2003 early 
in 2006, while maintaining the prohibition on anyone else distributing it. 
This has been a MAJOR nuisance for new Python-C-Windows developers who did 
not download it in time.

| What can I answer to my collegue who will say 'Python is changing and
| the stuff you are doing now is useless'?

Short answer: stuff that is useful now will continue to be useful until 
requirements change.

A possible longer answer: Google continues to make major use of Python 
without handcuffing themselves with such misunderstandings.  They hired 
Python's main developer both to write Python code for internal use and to 
continue Python's development as he saw fit.  They will be a test site for 
both the conversion process and the usability of the new version, giving 
Guido face-to-face feedback.  When both are good enough for Google's 
developers, they should be good enough for most of the rest of us too.

Terry Jan Reedy





From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug  1 09:50:53 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 01 Aug 2007 15:50:53 +0200
Subject: access the name of my method inside it
In-Reply-To: <1185973639.234450.305690@g12g2000prg.googlegroups.com>
References: <1185959202.302467.276080@x35g2000prf.googlegroups.com>
	<5hb1ebF3inuf2U6@mid.uni-berlin.de>
	<1185973639.234450.305690@g12g2000prg.googlegroups.com>
Message-ID: <46b08fb0$0$29143$426a74cc@news.free.fr>

james_027 a ?crit :
> Hi,
> 
> On Aug 1, 5:18 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Wed, 01 Aug 2007 09:06:42 +0000, james_027 wrote:
>>> for example I have this method
>>> def my_method():
>>>     # do something
>>>     # how do I get the name of this method which is my_method here?
>> Why do you need this?  There are ways but those are not really good for
>> production code.
>>
> 
> I am going to use this in Django. I am trying to implement a
> permission here, where in the database store the methods that the user
> are allowed to execute. for example if the method is def
> create_event(): the method will look for create_event in the database
> to see if it allow to be execute.

Then the solution is definitively to use a decorator, cf Paul's answer.


From horpner at yahoo.com  Mon Aug 27 14:44:18 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 27 Aug 2007 18:44:18 GMT
Subject: convert non-delimited to delimited
References: <1188237563.889663.228970@o80g2000hse.googlegroups.com>
Message-ID: <slrnfd66eo.1r4.horpner@FIAD06.norwich.edu>

On 2007-08-27, RyanL <ryanlauritsen at gmail.com> wrote:
> I'm a newbie!  I have a non-delimited data file that I'd like to
> convert to delimited.
>
> Example...
> Line in non-delimited file:
> 0139725635999992000010100534+42050-102800FM-15+1198KAIA
>
> Should be:
> 0139,725635,99999,2000,01,01,00,53,4,+42050,-102800,FM-15,+1198,KAIA

It looks like a fixed format data file, also called flat-record
files, in which fields are of fixed lengths, and records are
separated by newlines.

> What is the best way to go about this?  

Check out chapter 2 of _Text Processing in Python_ for one
solution.

http://gnosis.cx/TPiP/chap2.txt

-- 
Neil Cerutti
Weight Watchers will meet at 7 p.m. Please use large double door at the side
entrance. --Church Bulletin Blooper


From tjreedy at udel.edu  Mon Aug 20 23:41:10 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 20 Aug 2007 23:41:10 -0400
Subject: str().join() isn't working
References: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com><mailman.4.1187633821.32294.python-list@python.org><1187634895.387910.179500@m37g2000prh.googlegroups.com><496954360708201249y1db0aa14qf0de14538fb51b9d@mail.gmail.com><fad17f$252$1@sea.gmane.org>
	<496954360708201446s331f9763vc5a629067594a0d9@mail.gmail.com>
Message-ID: <fadmts$mjo$1@sea.gmane.org>


"Robert Dailey" <rcdailey at gmail.com> wrote in message 
news:496954360708201446s331f9763vc5a629067594a0d9 at mail.gmail.com...
| Yeah! That's it lol. Sorry, I wasn't looking at the documentation. At 
least
| you got the point!

But newbies might not have.  In any case, 'dir(list)' in interactive mode 
prints the list methods and similarly for other types. 





From dwoo at voicesignal.com  Thu Aug 30 18:01:11 2007
From: dwoo at voicesignal.com (Woo, Daniel)
Date: Thu, 30 Aug 2007 18:01:11 -0400
Subject: wx.DirDialog defaultPath
Message-ID: <4BFBA39857A02A4D9C92496D7E14001901D2E5CE@blackhole.voicesignal.com>

Is there some kind of parsing/checking that is done on the defaultPath?  The
path I would like to set as default is something like this:

"c:\Somedirectory\engineering\somedirectory".  When providing this as the
default, the control seems to think it is an invalid path, although it IS a
valid path under Windows.  I'm pretty sure this is because two directories in
the hierarchy have the same name.  Since it believes this is an invalid path,
the dialog opens up browsing in the root directory.  I can successfully set
the default to other directories, nested as deep as I want and it works as
expected.

 

Anyway around this?

 

Thanks!

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From thomas at jollans.com  Mon Aug 20 10:55:22 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Mon, 20 Aug 2007 16:55:22 +0200
Subject: How to decompress .Z file?
In-Reply-To: <1187593343.30969.4.camel@hckim-desktop>
References: <1187593343.30969.4.camel@hckim-desktop>
Message-ID: <200708201655.26301.thomas@jollans.com>

On Monday 20 August 2007, Hyunchul Kim wrote:
> Hi, all
>
> How can .Z file be decompressed?
>
> According to python library reference, .Z file might not be supported by
> python, yet.

The GNU zip program (gzip) supports .Z and .z archives, so if you only want to 
support UNIX-like systems you could simply look for a program named "gunzip" 
or "uncompress" and use that.

See also: http://mail.python.org/pipermail/python-list/2004-May/261669.html

The format is now so antiquated (replaced almost totally with zlib/gzip 
compression) that I doubt you'll see it in python, but 
http://en.wikipedia.org/wiki/LZW seams to sport a python implementation.

-- 
      Regards,                       Thomas Jollans
GPG key: 0xF421434B may be found on various keyservers, eg pgp.mit.edu
Hacker key <http://hackerkey.com/>:
v4sw6+8Yhw4/5ln3pr5Ock2ma2u7Lw2Nl7Di2e2t3/4TMb6HOPTen5/6g5OPa1XsMr9p-7/-6
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From Muhammad_Shiraz at Dell.com  Fri Aug 24 10:17:56 2007
From: Muhammad_Shiraz at Dell.com (Muhammad_Shiraz at Dell.com)
Date: Fri, 24 Aug 2007 09:17:56 -0500
Subject: Win32: Detecting when system is locked or sleeping
Message-ID: <2F8A7E1ED7BCED4A84FE44EAFEAED096029B4611@ausx3mpc122.aus.amer.dell.com>


Hi

I saw your post on the net. We are having a similar problem. Did you
ever find out how to detect system lock? 

Muhammad Asif Shiraz
Dell Inc. - eIntelligence
Ph: 512.728.6479

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From see at signature.invalid  Mon Aug 27 23:07:48 2007
From: see at signature.invalid (Douglas Wells)
Date: Mon, 27 Aug 2007 23:07:48 -0400 (EDT)
Subject: Socket - gaierror
References: <1188242671.182072.130150@r23g2000prd.googlegroups.com>
	<1188260349.031088.69010@l22g2000prc.googlegroups.com>
Message-ID: <fb03i4$2bjg$1@flame.contek.com>

In article <1188260349.031088.69010 at l22g2000prc.googlegroups.com>,
 half.italian at gmail.com writes:
> On Aug 27, 4:22 pm, s... at signature.invalid (Douglas Wells) wrote:
> > In article <1188244050.029920.314... at i13g2000prf.googlegroups.com>,
> >
> >  half.ital... at gmail.com writes:
> > > On Aug 27, 12:32 pm, Larry Bates <larry.ba... at websafe.com> wrote:
> >
> > > Changing it to IP gives me the same exact error...
> >
> > >   File "bin/prgram.py", line 123, in notify
> > >     smtp = smtplib.SMTP("XXX.XXX.XXX.XXX")
> >
> > >   File "/usr/lib/python2.4/smtplib.py", line 255, in __init__
> > >     addr = socket.gethostbyname(socket.gethostname())
> >
> > > gaierror: (-2, 'Name or service not known')
> >
> > > ~Sean
> >
> > Note that the lookup is of your *local* system name
> > (socket.gethostname()).  I suspect that the name of your client
> > system (the one running the python script) is not registered in
> > DNS.
> >
> > Try ping'ing your own system and see if that resolves in DNS.  In
> > UNIX/Linux you can use the hostname command; in any system you can
> > write a python script to print the result of socket.gethostname().
> >
> >  - dmw
> 
> I found a solution...but still not sure why that happened.
> 
> root at 00:17:08:5E:EF:0F:/usr/local/sw/program/bin# hostname
> 00:17:08:5E:EF:0F
> root at 00:17:08:5E:EF:0F:/usr/local/sw/program/bin# ping 00:17:08:5E:EF:0F
> ping: unknown host 00:17:08:5E:EF:0F
> 
> >>> socket.gethostname()
> '00:17:08:5E:EF:0F'
> 
> Workaround: pass the 'local_hostname' arg to the smtplib.SMTP() call
> with "localhost"
> 
> ie smtp.SMTP("some.computer", local_hostname="localhost")
> 
> This is just overriding the socket.gethostname() call entirely.
> 
> Did a bit of testing with the /etc/hosts file, and even with an entry
> to the hostname it can't resolve the ip.
> The problem is the name "00:17:08:5E:EF:0F"  PS.  I didn't choose to
> set the hostname that way.
> 
> ~Sean

That would be a reasonable workaround.  The process of sending
e-mail via SMTP could need the local host name for at least two
uses:  1) the SMTP initial connection (RFC 2821) requires the
client to identify itself (provide its host name); 2) the mail
headers (RFC 2822) should include a return address, which probably
defaults to using your user name at your client host name.

The hostname of your system (00:17:08:5E:EF:0F) is silly when used
with SMTP.  Your system administrator is either ill-informed or is
actively trying to prevent users from using their systems as
servers. It has the form of an IPv6 numeric host address.

Given the pathnames in your command interchange, you have a UNIX,
Linux, or UNIX-like system. According to the Linux and UNIX standards:

  - If your system is IPv6-capable, the use of such a name with
    gethostbyname invokes "unspecified behavior."   First, the function
    is not defined to work with such "numeric" identifiers.  Second,
    it is not guaranteed to work with non-IPv4 names, and probably
    can't be registered in pre-i18n DNS data bases.

  - Even if your system is not IPv6-capable, such a host name is going
    to confuse many other systems that would be IPv6-capable and attempt
    to resolve the odd-ball name that your system provides.

  - Even if that worked, you're providing an IPv6 name form in
    conjunction with an IPv4 protocol (at least when you explicitly
    provide the IP address as a dotted-quad).

 - dmw

-- 
.   Douglas Wells             .  Connection Technologies      .
.   Internet:  -sp9804- -at - contek.com-                     .


From michael at jedimindworks.com  Thu Aug 23 16:33:52 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Thu, 23 Aug 2007 13:33:52 -0700
Subject: Syslog
In-Reply-To: <1187654214.498082.225300@r34g2000hsd.googlegroups.com>
References: <1187654214.498082.225300@r34g2000hsd.googlegroups.com>
Message-ID: <84338CF6-F7F3-4F19-A99B-5F453741D172@jedimindworks.com>


On Aug 20, 2007, at 4:56 PM, greg wrote:

> Hi All,
>
> Could anyone tell me how I could syslog to a specific log (e.g. /var/
> log/daemon.log, /var/log/syslog.log...)?
>

# something like this:

import logging
logging.basicConfig(level=logging.DEBUG,
                     format='%(asctime)s %(levelname)-8s %(message)s',
                     datefmt='%a, %d %b %Y %H:%M:%S',
                     filename='/var/log/whatever.log',
                     filemode='a')

logging.info('random message')

hth,
Michael
---
# Something just doesn't seem right in those
# "Every kiss begins with 'K'" commercials.

 >>> 'Every Kiss'.startswith('K')
False






From steve at holdenweb.com  Tue Aug 21 19:10:43 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Aug 2007 19:10:43 -0400
Subject: Trouble with CGI code from Code Example 7.3 of the "Python  
	Interactive CGI Tutorial"
In-Reply-To: <1187710122.354087.158910@o80g2000hse.googlegroups.com>
References: <1187705685.007927.55030@z24g2000prh.googlegroups.com>
	<1187710122.354087.158910@o80g2000hse.googlegroups.com>
Message-ID: <fafrda$5n3$1@sea.gmane.org>

Gabriel Genellina wrote:

[...]working crystall balls are hard to find nowadays :)

Well, judging by the OP's response you appear to be in possession of a 
pair :-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From cajnnjonaj at fjireanjtjprodjuctijons.com  Sun Aug 19 12:22:14 2007
From: cajnnjonaj at fjireanjtjprodjuctijons.com (Aaron)
Date: Sun, 19 Aug 2007 11:22:14 -0500
Subject: yet another indentation proposal
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
	<1187538922.849174.94870@19g2000hsx.googlegroups.com>
Message-ID: <c7_xi.136$lJ2.120@fe089.usenetserver.com>

"Paddy" <paddy3118 at googlemail.com> wrote in message 
news:1187538922.849174.94870 at 19g2000hsx.googlegroups.com...
>
> Oh wow. it never crossed my mind...
>
> Can screen reaaderss be customized?
> Maybe their is a way to get the screen reader to say indent and dedent
> at thee appropriate places?
> Or maybe a filter to put those wordds into the source?
>
> - Paddy.
>


Interestingly enough, there is a feature in my screenreader that purports to 
do just that, but it has proven unreliable at best.  I think a filter to 
insert an indent indicator at the beginning of each line would not be too 
practical, as it would make copy and paste operations from one indentation 
level to another rather tedious (you'd have to add or remove one or more 
indicators from each line of code).

Finally, just to be clear, I do not want to change the way 99.9% of Python 
code is written.  I feel that the indentation model is a good one for 99.9% 
of users.  What I do want to do is simply give the Python interpreter a tiny 
bit more flexibility to handle code from users or environments where 
indentation is not possible or practical.

Aaron


-- 
To reply directly, remove j's from email address. 





From theokok2000 at gmail.com  Tue Aug 14 19:34:47 2007
From: theokok2000 at gmail.com (theokok2000 at gmail.com)
Date: Tue, 14 Aug 2007 23:34:47 -0000
Subject: ooh-yes
Message-ID: <1187134487.947597.286040@w3g2000hsg.googlegroups.com>

http://Theologos.kokkonis.googlepages.com/


http://kokonis.aygoystinos.googlepages.com/



From gregc at cgl.ucsf.edu  Thu Aug 30 00:12:36 2007
From: gregc at cgl.ucsf.edu (Greg Couch)
Date: 30 Aug 2007 04:12:36 GMT
Subject: Python molecular viewer
References: <mailman.103.1188394354.28954.python-list@python.org>
Message-ID: <fb5g3k$b3mt$1@cgl.ucsf.edu>

Andy Cheesman <Andy.cheesman at bristol.ac.uk> writes:

>Dear People,

>I was wondering if people could recommend a simple molecular viewing
>package written in python. I'm working in Theoretical chemistry and I'm
>not after an all-singing dancing molecular rendering package(pymol does
>that rather well) but a program which reads XYZ files and displays
>simple structures which can be rotated in 3D

>Thanks

>Andy

Check out http://www.cgl.ucsf.edu/chimera/.  Unlike PyMol, all of the
molecular data is accesible from Python.  It still might be too much
of an all-singing dancing molecular rendering package for you though.

        Greg Couch
	UCSF Computer Graphics Lab


From mail at microcorp.co.za  Wed Aug 22 11:01:44 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 22 Aug 2007 17:01:44 +0200
Subject: Dispatching default application for file, cross platform.
References: <01e101c7e48d$e0e9f860$03000080@hendrik>
	<46CBFF66.7030207@timgolden.me.uk>
Message-ID: <00af01c7e4cd$8f22ce40$03000080@hendrik>

"Tim Golden" <mail at timgolden.me.uk> wrote:

> Hendrik van Rooyen wrote:
> > How do I do the equivalent of clicking (in SuSe) or double clicking (in
Windows)
> > on a file?
> >
> > In effect I want to tell the OS - take this file and feed it to the
application
> > that is registered for it.
> >
> > Not too sure what to Google for.
> >
> > - Hendrik
>
> os.startfile
>
> TJG

 Brill - thanks Tim!

- Hendrik




From arkanes at gmail.com  Tue Aug 28 18:12:32 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 28 Aug 2007 17:12:32 -0500
Subject: Haskell like (c:cs) syntax
In-Reply-To: <fb25uh$gl9$1@online.de>
References: <fb25uh$gl9$1@online.de>
Message-ID: <4866bea60708281512q31635803x1b025274c94caf7e@mail.gmail.com>

On 8/28/07, Stefan Niemann <stefan at 3niemann.de> wrote:
> Hi,
>
> sorry that I'm relatively new to Python. But the syntax and semantics of
> Python already fascinate me, because I'm familiar with functional languages
> like Haskell.
>
> Is there a pattern matching construct in Python like (head : tail), meaning
> 'head' matches the first element of a list and 'tail' matches the rest? I
> could not find this in the Python documentation.
>
> Regards,
> Stefan
>
>

Python does not have haskell like pattern matching. Things are written
and done in a different way.

When working with lists, Python has a slice syntax (which is rather
more powerful than Haskells limited head->tail linked list syntax)
that you can use to chop a sequence up into various parts.


From pavlovevidence at gmail.com  Fri Aug 31 00:23:02 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 30 Aug 2007 21:23:02 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <7xlkbsmqe4.fsf@ruckus.brouhaha.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
Message-ID: <1188534182.970023.178290@i38g2000prf.googlegroups.com>

On Aug 30, 9:41 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Bruno Desthuilliers <bdesth.quelquech... at free.quelquepart.fr> writes:
> > FWIW, the "Eiffel and SPARK Ada folks" also "brilliantly explained"
> > why one can not hope to "write reliable programs" without strict
> > static declarative type-checking.
>
> I don't know about Eiffel but at least an important subset of SPARK
> Ada's DBC stuff is done using static analysis tools (not actually
> built into the compiler as it happens) to verify statically
> (i.e. without actually running the code) that the code fulfills the
> DBC conditions.  I don't see any way to do that with Python
> decorators.

I don't see any way to do that in Python with built-in DBC syntax,
either.  :)


Carl Banks



From has.temp3 at virgin.net  Mon Aug  6 05:46:19 2007
From: has.temp3 at virgin.net (has)
Date: Mon, 06 Aug 2007 02:46:19 -0700
Subject: xlrd question
In-Reply-To: <mailman.1654.1186339437.22759.python-list@python.org>
References: <mailman.1654.1186339437.22759.python-list@python.org>
Message-ID: <1186393579.221394.145020@w3g2000hsg.googlegroups.com>

On 5 Aug, 19:43, jay <jyoun... at kc.rr.com> wrote:

> So if I'm understanding this correctly, it really only  
> installs something in '/Library/Python/2.3/site-packages'

Correct.

> (as well as  
> an alias to it from '/System/Library/Frameworks/Python.framework/
> Versions/2.3/lib/python2.3/site-packages')

No, /System.../python2.3/site-packages is a symlink to /Library/Python/
2.3/site-packages set up by Apple. DistUtils makes no modification to
anything under /System.

HTH

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



From Brian.McCann at viziant.net  Wed Aug 29 17:03:05 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Wed, 29 Aug 2007 17:03:05 -0400
Subject: copying files
References: <93066C069973ED448DC2BCEA9C44A7383BE30C@efmailx>
	<46D5C01B.7080202@bigfoot.com>
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE30E@efmailx>

 
 
<mailto:brian.mccann at viziant.net> 
Hi Ricardo,

what do the + signs do?
 

________________________________

From: Ricardo Ar?oz [mailto:ricaraoz at gmail.com]
Sent: Wed 8/29/2007 2:51 PM
To: Brian McCann
Cc: python-list at python.org
Subject: Re: copying files



Brian McCann wrote:
> Hi,
> 
> with the code below I set a variable TEST_HOME to a path and the
> variable m to a path
> in my current dir.
> I have a symbolic link setting m---->lib
> when I run the script I get no errors and the lib dir with its 20 files
> does not get copied to /v01/test_home
> any help would be greatly appreciated
> 
> --Brian
>
> #!/usr/bin/python
> import string
> import os
> import sys
> import errno
> import shutil
> import tarfile
> 
> TEST_HOME = "/v01/test_home"
> m = "./lib"
> os.system("cp -r m TEST_HOME")
> #os.system("tar -cvf viziant-ingestion.tar /v01/")
> 

Sorry, meant : os.system("cp -r " + m + " " + TEST_HOME)




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From michele.simionato at gmail.com  Fri Aug 31 08:40:51 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Fri, 31 Aug 2007 12:40:51 -0000
Subject: Google spreadsheets
Message-ID: <1188564051.726895.288860@y42g2000hsy.googlegroups.com>

I would like to upload a tab-separated file to a Google spreadsheet
from Python. Does anybody
have a recipe handy? TIA,

    Michele Simionato



From gherron at islandtraining.com  Thu Aug 16 06:24:21 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 16 Aug 2007 03:24:21 -0700
Subject: python socket usage
In-Reply-To: <200708161153.12294.comp.ogz@gmail.com>
References: <mailman.2046.1187250159.22759.python-list@python.org>	<1187250839.541105.60900@r29g2000hsg.googlegroups.com>	<46C408D6.8000907@islandtraining.com>
	<200708161153.12294.comp.ogz@gmail.com>
Message-ID: <46C425D5.3060300@islandtraining.com>

O?uz Yar?mtepe wrote:
> On Thursday 16 August 2007 11:20:38 Gary Herron wrote:
>   
>> If you really want to send any Python object through a socket, look up
>> the Pickle and cPickle modules.  These will marshal (as it's called) any
>> Python object of any type and complexity into a byte string which can be
>> sent across a socket.  On the receiving end of the socket, the byte
>> string can be turned back into an equivalent Python object.
>>
>> Gary Herron
>>     
>
> As i read pickle module is Python-spesific. I need to talk with a Java 
> application and get the infortion that it will send. What i do right now is 
> listening a socket and reding the string that is sent by the java 
> application. So the java application is sending a string and i am reading and 
> parsing it and getting the related infortion i need. A more professional way 
> may be the reading the object itself. Is it possible to get the array for ex. 
> object that is sent from the Java application with sockets?
>
>   
Then consider XMLRPC.  It is a language/platform independent way of
making a call to a remote procedure (with parameters).   Your Python
program would implement a XMLRPC server listening for calls to a single
procedure, and your Java program would make a connection to the XMLRPC
server and make a call to the procedure.

The XMLRPC package in JAVA (don't know what it's called, but it's gotta
exist) will package up the procedure being called and its parameters as
an XML document, and  send it to the server.  The  Python  XMLRPC server
package will decipher the XML document, extracting the procedure name
and its arguments, make the call, and package up any return value (again
as an XML document) and send it back on the socket.  The calling JAVA
program will receive the return value, just as in any normal procedure
call, and continue on it's merry way.

The XMLRPC protocol can only pass simple arguments, and (I think) arrays
of simple arguments.   But that's sufficient for a tuple of integers as
you had in your example.

Hope that helps,
Gary Herron



From jstroud at mbi.ucla.edu  Sat Aug  4 02:35:21 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 03 Aug 2007 23:35:21 -0700
Subject: How to pass a reference to the current module
In-Reply-To: <7xy7gr51ny.fsf@ruckus.brouhaha.com>
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>
	<pan.2007.08.04.01.46.50.985228@REMOVE.THIS.cybersource.com.au>
	<7xy7gs9ioe.fsf@ruckus.brouhaha.com>
	<pan.2007.08.04.04.37.38.567054@REMOVE.THIS.cybersource.com.au>
	<7xy7gr51ny.fsf@ruckus.brouhaha.com>
Message-ID: <B6Vsi.1312$qa3.889@nlpi069.nbdc.sbc.com>

Paul Rubin wrote:
> Hmm, it's a pain that there's no clean way to get at the current
> module.  PEP 3130 shows some icky and unreliable ways, e.g.
> 
>    func = getattr(sys.modules[__name__], 'f')
> 
> PEP 3130's goal was to add a clean way to do this.  Unfortunately it
> was rejected.

Yes, this is the essence of the problem. At least I'm not the only one 
to have needed (or at least wanted) this.

James


From steve at holdenweb.com  Mon Aug 13 20:06:09 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Aug 2007 20:06:09 -0400
Subject: chmod g+ Equivalent
In-Reply-To: <1187042290.821786.178420@19g2000hsx.googlegroups.com>
References: <1187042290.821786.178420@19g2000hsx.googlegroups.com>
Message-ID: <f9qrle$7gt$1@sea.gmane.org>

milan_sanremo wrote:
> I've read the documentation on os.chmod() and can implement all the
> standard commands, but what is the syntax for the equivalent of chmod g
> + to set the group id?
> 

I assume when you say "to set the group id" you actually mean "to assert 
the setgid bit"? I further presume that when you say "chmod g+" you 
actually mean "chmod g+s".

You can't have read the documentation very thoroughly. It says right at 
the top:

S_ISUID
S_ISGID

Of course, your process needs to have root privilege in order to be able 
to do that.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From me at privacy.net  Tue Aug 28 06:13:49 2007
From: me at privacy.net (Dan Sommers)
Date: Tue, 28 Aug 2007 10:13:49 GMT
Subject: Biased random?
References: <favd0c$fcu$1@ss408.t-com.hr>
Message-ID: <pan.2007.08.28.10.15.57@privacy.net>

On Mon, 27 Aug 2007 22:42:45 +0200, Ivan Voras wrote:

> I have a list of items, and need to choose several elements from it,
> "almost random". The catch is that the elements from the beginning
> should have more chance of being selected than those at the end (how
> much more? I don't care how the "envelope" of probability looks like at
> this point - can be linear). I see that there are several functions in
> Python standard libraries for various distribution, but is there an easy
> pythonic way to make them do what I need?

If you really just want to tend towards the beginning of the list, and
don't care what the envelope looks like, how about this:

    def biasedselection(thelist):
        index = random.random() * random.random() * len(thelist)
        # or index random.random() ** 2 * len(thelist)
        return thelist[index]

Dan

-- 
Dan Sommers                                   A death spiral goes clock-
<http://www.tombstonezero.net/dan/>           wise north of the equator.
Atoms are not things. -- Werner Heisenberg              -- Dilbert's PHB


From nospam.themindstorm at gmail.com  Wed Aug  1 19:57:38 2007
From: nospam.themindstorm at gmail.com (Alex Popescu)
Date: Wed, 1 Aug 2007 23:57:38 +0000 (UTC)
Subject: Where do they tech Python officialy ?
References: <1185209574.045112.163780@g4g2000hsf.googlegroups.com>
	<7xveca4ajp.fsf@ruckus.brouhaha.com>
	<1185265091.276958.239910@r34g2000hsd.googlegroups.com>
	<1i23wyk.avc945i4dwsiN%aleax@mac.com>
	<mailman.1423.1185957645.22759.python-list@python.org>
	<1i25pjo.1mo5uqc1yxqsjkN%aleax@mac.com>
Message-ID: <Xns99801DC5855C4themindstorm@80.91.229.5>

aleax at mac.com (Alex Martelli) wrote in news:1i25pjo.1mo5uqc1yxqsjkN%
aleax at mac.com:

> Alex Popescu <nospam.themindstorm at gmail.com> wrote:
>    ...
>> > and you will both learn a lot _and_ acquire "professional 
experience"
>> > that any enlightened employer will recognize as such.  
>> 
>> It depends :-). In my experience I met employers being concerned by 
my
>> implication in the oss world :-).
> 
> Considering that even the King of Proprietary Software, Microsoft, now
> happily hires major Open Source figures such as Jim Hugunin (MS was 
also
> a top-tier sponsor at the recent OSCON, with both managerial and 
senior
> technical employees giving keynotes and tech talks), it boggles the 
mind
> to think about which kind of company would instead be "concerned" by a
> candidate's OS experience.
> 
> 

Have you seen/heard of Jim lately? Cause I haven't. By the time he was 
the lead of the AspectJ team his charismatic presence was everywhere (at 
least around that project).
However I do agree with you. The only remark is that US trends are not 
hitting my part of Eu so quickly ;-) (things are indeed changing).

> These are the ones you don't wan't to work for anyway !-)

Well... this is sometimes debatable :-).

bests,
./alex
--
.w( the_mindstorm )p.





From mccredie at gmail.com  Thu Aug 30 19:27:03 2007
From: mccredie at gmail.com (Matimus)
Date: Thu, 30 Aug 2007 23:27:03 -0000
Subject: Registering a python function in C
In-Reply-To: <1188508874.879215.319400@i13g2000prf.googlegroups.com>
References: <1188508874.879215.319400@i13g2000prf.googlegroups.com>
Message-ID: <1188516423.744038.309700@z24g2000prh.googlegroups.com>

On Aug 30, 2:21 pm, fernando <fernandofariajun... at gmail.com> wrote:
> Could someone post an example on how to register a python function as
> a callback in a C function? It expects a pointer to PyObject... how do
> I expose that? Basically, the signature of the function is
> foo(PyObject* obj), where obj is the callback function... It's not
> exactly extending or embedding, I've looked at those examples but they
> don't really show how to do this...
>
> Thanks for the help!

It most definitely is extending or embedding, it just doesn't follow
the examples provided. I can't be too specific because I don't know
what your environment is like. As in, have you already initialized
python and all of that? Do you have access to _any_ PyObject*
variables?

Here is something that _might_ help (not tested):
[code]
PyObject* mod;
PyObject* func;

mod = PyImport_ImportModule("mymodule");
func = PyObject_GetAttrString( mod, "myfunc") ;
foo(func);
[/code]

It might be useful to look at the "Python/C API Reference Manual", not
just the extending and embedding stuff.

http://docs.python.org/api/api.html

Matt



From steve at holdenweb.com  Mon Aug 13 19:44:58 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Aug 2007 19:44:58 -0400
Subject: Finding gurus (was Re: Something in the function tutorial confused
	me.)
In-Reply-To: <1187037060.708280.12820@i13g2000prf.googlegroups.com>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>	<mailman.1737.1186577596.22759.python-list@python.org>	<5hv705F3mk67nU1@mid.individual.net>	<1i2nhnv.2y00l5173lfbbN%aleax@mac.com>	<f9kd93$lg8$1@panix3.panix.com>	<mailman.1935.1187032913.22759.python-list@python.org>
	<1187037060.708280.12820@i13g2000prf.googlegroups.com>
Message-ID: <f9qqdn$355$1@sea.gmane.org>

kyosohma at gmail.com wrote:
> On Aug 13, 2:22 pm, Ricardo Ar?oz <ricar... at gmail.com> wrote:
>> Aahz wrote:
>>> In article <1i2nhnv.2y00l5173lfbbN%al... at mac.com>,
>>> Alex Martelli <al... at mac.com> wrote:
>>>> Because of this, a Google search for
>>>>  "<name> <surname>" python
>>>> may sometimes help; when you get 116,000 hits, as for "Steve Holden"
>>>> python, that may be a reasonable indication that the poster is one of
>>>> the world's Python Gurus (in fact, the winner of the 2007 Frank WIllison
>>>> Award -- congratulations, Steve!!!).
>>> Sometimes that precise search pattern isn't appropriate, of course.  ;-)
>> Sorry, will answer as soon as I read the 52000 hits for "Aahz python".
>> Be patient ;c)
> 
> No offense to Steven but Alex has over twice as many hits. Gives the
> rest of us something to shoot for, eh?
> 
No offense taken: Alex won the award before me!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From lists at liquidtrust.org  Thu Aug 23 16:37:07 2007
From: lists at liquidtrust.org (Charlie)
Date: Thu, 23 Aug 2007 14:37:07 -0600
Subject: MsiLib
In-Reply-To: <46CDE72F.2090009@v.loewis.de>
References: <mailman.172.1187876423.32294.python-list@python.org>
	<46CDE72F.2090009@v.loewis.de>
Message-ID: <20070823143707.su0fwun9jk84sc0w@mail.liquidtrust.org>

Quoting "Martin v. L?wis" <martin at v.loewis.de>:

> Charlie schrieb:
>> Thank you everybody for your help. It finally runs without errors and I
>> should be able to use this as I figure out more of it. I am curios if
>> there is any idea as to when GetString will be implemented?
>
> If I can find the time, it may be for Python 2.6. If not, Python 2.7,
> 3.1, or so. Faster if a patch is contributed.
>
> Regards,
> Martin
>

Thank you. I would be willing to help out, but as of now I have no  
idea how to get started on it. If you would be willing to provide some  
guidance, then I would be fine with giving it a shot if nothing more.  
My guess is that it would have to implement the MsiRecordGetString  
function so that it is accessible, but I don't know beyond that.

Charlie



From durumdara at gmail.com  Tue Aug 14 04:32:25 2007
From: durumdara at gmail.com (durumdara)
Date: Tue, 14 Aug 2007 10:32:25 +0200
Subject: [half-off] LAMA - how to I use the news server with thunderbird
Message-ID: <46C16899.5030906@gmail.com>

Hi!

Is anyone knows about an NNTP servers that containing newsgroups about 
these lists:
    - python win32 (python-win32)
    - mod_python
    - gimp-python
    - gimp

I wanna set thes nntp servers in thunderbird so I need correct addresses.

Thanks for your help:
    dd


From gagsl-py2 at yahoo.com.ar  Tue Aug 28 02:30:52 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 28 Aug 2007 03:30:52 -0300
Subject: Biased random?
References: <favd0c$fcu$1@ss408.t-com.hr>
Message-ID: <op.txra1qgsx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 27 Aug 2007 17:42:45 -0300, Ivan Voras <ivoras at __fer.hr__>  
escribi?:

> I have a list of items, and need to choose several elements from it,
> "almost random". The catch is that the elements from the beginning
> should have more chance of being selected than those at the end (how
> much more? I don't care how the "envelope" of probability looks like at
> this point - can be linear). I see that there are several functions in
> Python standard libraries for various distribution, but is there an easy
> pythonic way to make them do what I need?


Using a linear (or triangular) distribution:

--- begin ---
 from random import randint

def biased_choice(values):
     """Choose a random element from values;
     first elements are chosen more frequently than later ones.
     Weights are linearly assigned; given n elements, the first
     has weight n, second has n-1, ... last has weight 1.
     """
     n = len(values)
     sumw = ((n + 1) * n) // 2
     x = randint(1, sumw)
     F = 0
     for i in xrange(1, n+1):
         F += i
         if x<=F: return values[-i]

# test
 from collections import defaultdict
values = ["a", "b", "c", "d", "e"]
stats = defaultdict(int)
for i in xrange(150000):
     stats[biased_choice(values)] += 1
for key in sorted(stats):
     print key, stats[key]
--- end ---

Output:
a 50023
b 39869
c 30256
d 19784
e 10068

-- 
Gabriel Genellina



From labrach at gmail.com  Wed Aug 29 12:22:51 2007
From: labrach at gmail.com (labrach at gmail.com)
Date: Wed, 29 Aug 2007 16:22:51 -0000
Subject: python + gcov
Message-ID: <1188404571.590476.265840@r34g2000hsd.googlegroups.com>

Hi
I want to profile (and analyse coverage) some  c++ code imported as a
python module
I've compiled python (2.4.2) with gcc 3.4.3 and flags=-Wall -fprofile-
arcs -ftest-coverage in order to use gcov. However, the python binary
does not generate any coverage file (such than *.gcno, gcda) during
execution.
any tips ?
or may be another method to profile c++ wrapped modules within
python ?

thanks

laurent



From steve at holdenweb.com  Tue Aug 14 19:30:01 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 14 Aug 2007 19:30:01 -0400
Subject: chmod g+ Equivalent
In-Reply-To: <1187094251.540591.308320@g4g2000hsf.googlegroups.com>
References: <1187042290.821786.178420@19g2000hsx.googlegroups.com>	<mailman.1946.1187053563.22759.python-list@python.org>
	<1187094251.540591.308320@g4g2000hsf.googlegroups.com>
Message-ID: <46C23AF9.3020107@holdenweb.com>

milan_sanremo wrote:
> On Aug 13, 8:06 pm, Steve Holden <st... at holdenweb.com> wrote:
>> milan_sanremo wrote:
>>> I've read the documentation on os.chmod() and can implement all the
>>> standard commands, but what is the syntax for the equivalent of chmod g
>>> + to set the group id?
>> I assume when you say "to set the group id" you actually mean "to assert
>> the setgid bit"? I further presume that when you say "chmod g+" you
>> actually mean "chmod g+s".
> 
> The g+s was an omission on my part.  I can see how it would confuse
> the issue.
> 
> I'm not sure if I mean "to assert the setgid bit".  My SUN docs refer
> to it being 'on'.
> http://docs.sun.com/app/docs/doc/819-3321/6n5i4b767?l=en&a=view&q=setgid+bit
> 
>> You can't have read the documentation very thoroughly. It says right at
>> the top:
>>
>> S_ISUID
>> S_ISGID
> 
> I did see this in the documentation:
> 
> Change the mode of path to the numeric mode. mode may take one of the
> following values (as defined in the stat module) or bitwise or-ed
> combinations of them:
> 
>     * S_ISUID
>     * S_ISGID
> 
> Which refers to:
> http://docs.python.org/lib/module-stat.html
> 
> After which it was still unclear.
> 
> My question is in the command os.chmod(myDirectory, ?) what is the
> value for ? to turn on the setgid bit.
> 
> Contrary to your presumption, I did read the documentation
> thoroughly.  It is inability to understand the concept which prompted
> me to post the question here.
> 
Well, you don't tell us what (if anything) you have tried so far. Python 
has an interpreter that's very easy to use interactively. Why don't you try

     os.chmod(my_directory, os.S_ISGID)

and see if it does what you want? You can often save time by trying such 
things for yourself. Though it needn't be a substitute for asking 
questions on this list, it can make your questions better-informed.

In this particular case, now I understand your needs a little better, 
since you want to *add* a bit setting you will likely have to use 
something like

     current_permissions = os.fstat(my_directory).ST_MODE

to read the directory's current permission bits. Then you will need to 
execute

     os.chmod(my_directory, current_permissions | stat.S_ISGID)

Please don't take this as gospel, though, as I am currently on the road 
with only a Windows computer available, but I think it should get you 
closer to where you want to be.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From ldo at geek-central.gen.new_zealand  Mon Aug 27 18:54:52 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Tue, 28 Aug 2007 10:54:52 +1200
Subject: Socket - gaierror
References: <1188242671.182072.130150@r23g2000prd.googlegroups.com>
	<OIidnbjzCJVLu07bnZ2dnUVZ_gidnZ2d@comcast.com>
	<1188244050.029920.314700@i13g2000prf.googlegroups.com>
	<1188253525.718844.115500@q5g2000prf.googlegroups.com>
Message-ID: <favkj8$akh$1@lust.ihug.co.nz>

In message <1188253525.718844.115500 at q5g2000prf.googlegroups.com>, 
half.italian at gmail.com wrote:

> What could cause the shell to be
> able to resolve the addresses properly, but not python?
> nnsswitch.conf ?

How did you test the name resolution in the shell--was it with "host"
or "ping"? I would recommend ping, because that would use the same C
runtime gethostbyname call that your Python code is trying to use.


From tdwdotnet at gmail.com  Thu Aug 23 16:10:26 2007
From: tdwdotnet at gmail.com (Tim Williams)
Date: Thu, 23 Aug 2007 21:10:26 +0100
Subject: Using Regular Expresions to change .htm to .php in files
In-Reply-To: <9afea2ac0708231305v539390dew84926f0b0dcd6974@mail.gmail.com>
References: <B81995429.43.65370.1@mxextra>
	<9afea2ac0708231305v539390dew84926f0b0dcd6974@mail.gmail.com>
Message-ID: <9afea2ac0708231310i2b1292c4m60923b7fcd30829c@mail.gmail.com>

On 23/08/07, Tim Williams <tdwdotnet at gmail.com> wrote:
> On 23/08/07, sebzzz at gmail.com <sebzzz at gmail.com> wrote:
> > Hi,
> >
> > I have a bunch of files that have changed from standard htm files to
> > php files but all the links inside the site are now broken because
> > they point to the .htm files while they are now .php files.
> >
> > Does anyone have an idea about how to do a simple script that changes
> > each .htm in a given file to a .php
> >
> > Thanks a lot in advance
> >
>
> Something like:
>
> Infile = open(f_name,'r+')
> Data =  Infile.read()
> InFile.write(Data.replace('.htm','.php'))
> Infile.close()
>

Actually,  scrub that, its been a long day!    You either need a
Infile.seek(0)  in the above before the write() , or you can do.

Data = open(f_name).read()
outfile = open(f_name,'w')
outfile.write(Data.replace('.htm','.php'))
outfile.close()


From kyosohma at gmail.com  Sun Aug 12 21:00:51 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 13 Aug 2007 01:00:51 -0000
Subject: Complexity of methods etc
In-Reply-To: <mailman.1892.1186963490.22759.python-list@python.org>
References: <mailman.1892.1186963490.22759.python-list@python.org>
Message-ID: <1186966851.882346.244490@l22g2000prc.googlegroups.com>

On Aug 12, 7:04 pm, "Nathan Harmston" <ratchetg... at googlemail.com>
wrote:
> Hi,
>
> I was wondering if anyone knew of any resources, where I might be able
> to find information about the complexity of certain python functions
> or little tips on how to reduce complexity. I mean like the "".join(),
> kind of thing?
>
> I want to see if there are any improvements I can add to my coding in
> order to reduce  time/space usage/
>
> Many Thanks in advance
>
> Nathan

Read a book? Lutz's "Programming Python 3rd Ed." will teach you a lot
of tricks. I would also recommend the Python Cookbook book or the
online version here: http://aspn.activestate.com/ASPN/Python/Cookbook/

Mike



From martin at v.loewis.de  Tue Aug 14 05:30:57 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 14 Aug 2007 11:30:57 +0200
Subject: IDLE path browser not  recognizing my  PYTHONPATH
In-Reply-To: <1187071523.150365.125590@x40g2000prg.googlegroups.com>
References: <1187071523.150365.125590@x40g2000prg.googlegroups.com>
Message-ID: <46C17651.6090407@v.loewis.de>

> I set PYTHONPATH to /home/me/bin in bash.bashrc, however the IDLE path
> browser is not recognizing this.  Not sure why.
> 
> Grateful for any insight.

The file "bash.bashrc" has no relevance. If you meant to set the
variable every time you start bash, put it into ".bashrc", in your
home directory. If that still doesn't work, type "env" before starting
idle, and inspect its output.

Regards,
Martin


From fabioztessitore at libero.it  Fri Aug  3 17:45:49 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 03 Aug 2007 21:45:49 GMT
Subject: downloading files
References: <1186166920.757662.269340@o61g2000hsh.googlegroups.com>
	<mailman.1584.1186168229.22759.python-list@python.org>
	<1186176739.765447.262720@w3g2000hsg.googlegroups.com>
Message-ID: <46b3a20d$0$17946$4fafbaef@reader1.news.tin.it>

Il Fri, 03 Aug 2007 14:32:19 -0700, Ehsan ha scritto:


> It works but could you explain more what's wrong with just 'w'?

On Unix-like systems newline means '\n'

On Window newline means '\r\n'

So, when you open a file on Window with 'w' option, Win replace 
downloaded '\n' with a local '\r\n' and the file isn't readable. If you 
use 'wb' you say that you want a binary copy ('b' option) and Win doesn't 
replace anything.

Hope it is useful,

bye
Fabio


From byte8bits at gmail.com  Thu Aug  2 14:59:19 2007
From: byte8bits at gmail.com (brad)
Date: Thu, 02 Aug 2007 14:59:19 -0400
Subject: Determining if file is valid image file
In-Reply-To: <1186064275.652416.250540@d55g2000hsg.googlegroups.com>
References: <1186064098.587590.91210@g4g2000hsf.googlegroups.com>
	<1186064275.652416.250540@d55g2000hsg.googlegroups.com>
Message-ID: <f8t9l2$9vr$1@solaris.cc.vt.edu>

Andr? wrote:

> I should have added: I'm interesting in validating the file *content*
> - not the filename :-)

Some formats have identifying headers... I think jpeg is an example of 
this. Open it with a hex editor or just read the first few bytes and see 
for yourself.

Brad


From steve at holdenweb.com  Fri Aug 10 08:17:43 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Aug 2007 08:17:43 -0400
Subject: Question about properties.
In-Reply-To: <1186742730.729034.256800@i13g2000prf.googlegroups.com>
References: <1186741289.074717.174370@e16g2000pri.googlegroups.com>	<5i2t7dF3kqc46U3@mid.uni-berlin.de>
	<1186742730.729034.256800@i13g2000prf.googlegroups.com>
Message-ID: <f9hl13$7cq$1@sea.gmane.org>

king kikapu wrote:
> On Aug 10, 1:33 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Fri, 10 Aug 2007 03:21:29 -0700, king kikapu wrote:
>>> Hi,
>>> i read in a book the following code snippet that is dealing with
>>> properties:
>>> class ProtectAndHideX(object):
>>>     def __init__(self, x):
>>>         assert isinstance(x, int), '"x" must be an integer!"'
>>>         self.__x = ~x
>>>     def get_x(self):
>>>         return ~self.__x
>>>     x = property(get_x)
>>> Can anyone please help me understand what the symbol "~" does here ??
>> This has nothing to do with properties.  For integer objects ``~`` is the
>> bitwise negation or invertion operator.
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch
> 
> Xmmm...ok then but what is actually doing there ?? I removed it and
> things seems to work the same way...
> 
Observe the name of the class. I believe the integer value is inverted 
merely as a demonstration that the value can be "obscured" somehow - in 
a more complex example the author might have insisted in string values, 
the encrypted them. It's not essential to the example, it merely shows 
that the value retrieved from the property can be computed from 
underlying attributes.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From paddy3118 at googlemail.com  Sun Aug 19 11:56:38 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sun, 19 Aug 2007 15:56:38 -0000
Subject: Python syntax r prefix to a string
In-Reply-To: <1187538233.285841.117280@e9g2000prf.googlegroups.com>
References: <1187538233.285841.117280@e9g2000prf.googlegroups.com>
Message-ID: <1187538998.016872.243160@w3g2000hsg.googlegroups.com>

On Aug 19, 4:43 pm, goldtech <goldt... at worldpost.com> wrote:
> Does anyone know this syntax and could link me to an explanation?
>
> Something like:
>
> Workspace = r'C:\foobar\mystuff\xyz'
>
> What's that "r" doing? Sometimes I see a "u" too.
>
> Explanation appreciated.
>
> Thanks,
> Lee G.

Search for raw strings and unicode stringss...



From byte8bits at gmail.com  Wed Aug  8 09:58:01 2007
From: byte8bits at gmail.com (brad)
Date: Wed, 08 Aug 2007 09:58:01 -0400
Subject: This bit of code hangs Python Indefinitely
In-Reply-To: <5htvm3F3md0abU3@mid.uni-berlin.de>
References: <f9ch45$ku$1@solaris.cc.vt.edu> <5htvm3F3md0abU3@mid.uni-berlin.de>
Message-ID: <f9ci85$1t3$2@solaris.cc.vt.edu>

Marc 'BlackJack' Rintsch wrote:

> Why did you put an upper bound to the queue?

For clarity. Explicit is better than implicit, right? In our design, the 
queue should only have x number of things, so why not show that? Other 
than that, the limit is arbitrary and is not needed.


From lists at liquidtrust.org  Thu Aug 23 09:33:36 2007
From: lists at liquidtrust.org (Charlie)
Date: Thu, 23 Aug 2007 07:33:36 -0600
Subject: MsiLib
Message-ID: <20070823073336.cgppsh9yscccs0o4@mail.liquidtrust.org>

Thank you everybody for your help. It finally runs without errors and  
I should be able to use this as I figure out more of it. I am curios  
if there is any idea as to when GetString will be implemented?

Charlie



From santi_anti at yahoo.com  Tue Aug 21 05:18:26 2007
From: santi_anti at yahoo.com (susanti marsol)
Date: Tue, 21 Aug 2007 02:18:26 -0700 (PDT)
Subject: how to remove number
In-Reply-To: <mailman.205.1187683205.32293.python-list@python.org>
Message-ID: <763139.69891.qm@web63115.mail.re1.yahoo.com>


how to remove all number in our's document?

python-list-request at python.org wrote: Send Python-list mailing list submissions to
 python-list at python.org

To subscribe or unsubscribe via the World Wide Web, visit
 http://mail.python.org/mailman/listinfo/python-list
or, via email, send a message with subject or body 'help' to
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of Python-list digest..."
Today's Topics:

   1. Re: GeneratorExit should derive from BaseException, not
      Exception (Chad Austin)
   2. Re: GeneratorExit should derive from BaseException, not
      Exception (Chad Austin)
   3. Re: Newbee Question (Asun Friere)
   4. Re: Is there a way to change the default string encoding?
      (Ron Garret)
   5. Re: Is there a way to change the default string encoding?
      (Fabio Z Tessitore)
   6. Re: Newbee Question (Asun Friere)
   7. Re: Is there a way to change the default string encoding?
      (Peter Otten)
   8. Re: Newbee Question (Asun Friere)
   9. Re: yet another indentation proposal (Dennis Lee Bieber)
  10. Re: datetime in microseconds (Dennis Lee Bieber)
  11. Re: Newbee Question (Dennis Lee Bieber)
From: Chad Austin <chad at imvu.com>
To: python-list at python.org
Date: Tue, 21 Aug 2007 00:01:01 -0700
Subject: Re: GeneratorExit should derive from BaseException, not Exception

 Hi Terry,

Thank you for your feedback.  Responses inline:

Terry Reedy wrote:
> "Chad Austin"  wrote in message 
> news:46CA0EFE.6020103 at imvu.com...
> || try:
> | result = yield chatGateway.checkForInvite({'userId': userId})
> | logger.info('checkForInvite2 returned %s', result)
> 
> would not
> except GeneratorExit: 
> solve your problem?

Yes, we could add an "except GeneratorExit: raise" clause to every place
we currently catch Exception, but I feel like this is one of those
things where it's hard to get it right in all places and also hard to
cover with unit tests.  Instead, we'll have subtle bugs where finally
clauses don't run because the GeneratorExit was swallowed.

Also, SystemExit and KeyboardInterrupt were made into BaseExceptions for
the same reasons as I'm giving.  (As I understand it, anyway.)

> | except Exception:
> 
> Such catchalls are known to be prone to catch too much
> and are therefore not encouraged ;-).
> As in 'use at your own risk'.
> Guido encourages specific catches just for the reasons you give here.

More below:

> There was a *long* discussion of the current 2.5 exception hierarchy on 
> pydev.  Search either python.org's or gmane's archive if you want to pursue 
> this.  But I expect the people involved would say much the same as above.

I've actually read the background on the exception hierarchy (and agree
with it all), especially other suggestions that GeneratorExit derive
from BaseException.  As I understand it, Guido's objections are threefold:

1) The previous "generators as coroutines" examples were too
theoretical:  I've wanted GeneratorExit to derive from BaseException for
months now, but didn't write this proposal until I actually wrote code
that failed in the presence of task cancellation.

2) You should avoid catching everything with except Exception:  I think
that's too idealistic. Just do a search for try: except: through
publicly available Python.  :)  Sometimes, you really _do_ want to catch
everything.  When you're making a network request that involves
xmlrpclib, urllib2, httplib, etc. you don't actually care what the error
was.  (Well, except that the exceptions are submitted for automated
analysis.)  Similarly, when loading a cache file with pickle, I don't
care what went wrong, because it's not critical and should not be turned
into a crash for the user.  (We automatically report exceptions that
bubble into the main loop as crashes.)

3) If GeneratorExit escapes from the generator somehow and gets raised
in the main loop, then it will bubble out of the application like
SystemExit and KeyboardInterrupt would:  I think this argument is
somewhat specious, because I can't imagine how that would happen.  You'd
have to store exceptions in your generator and explicitly bubble them
out somehow.  Our crash handling has to specially handle
KeyboardInterrupt and SystemExit anyway, since there are currently
non-Exception exceptions, such as strings and custom classes that forgot
to derive from Exception, that should count as crashes.

I personally can't think of any cases where I would _want_ to handle
GeneratorExit.  I just want finally: and with: clauses to do the right
thing when a task is cancelled.  Anyway, I haven't yet encountered any
serious bugs due to this yet...  I'm just worried that if a task is
holding some resource and blocking on something, then the resource won't
get released.  If this really does come up, then I do have a little bit
of python + ctypes that replaces GeneratorExit with ImvuGeneratorExit
(deriving from BaseException), but that's not very appealing.

Thanks again,

-- 
Chad Austin
http://imvu.com/technology


From: Chad Austin <chad at imvu.com>
To: python-list at python.org
Date: Tue, 21 Aug 2007 00:41:03 -0700
Subject: Re: GeneratorExit should derive from BaseException, not Exception

 Oops, forgot to mention this:

I wouldn't be opposed to a different extension that would effectively 
let me accomplish the same goals...  arbitrary exception filters. 
Imagine this:

 try:
  raise GeneratorExit
 except ExceptionFilter:
  # blah

where ExceptionFilter is any object that can be tested for containment. 
  Perhaps implemented like this:

 class ExceptionFilter(object):
  def __init__(self):
   self.includes = set()
   self.excludes = set()

   self.include = self.includes.add
   self.exclude = self.excludes.add

  def __contains__(self, exc):
   return any(isinstance(exc, cls) for cls in self.includes) and \
    not any(isinstance(exc, cls) for cls in self.excludes)

 ImvuExceptionFilter = ExceptionFilter()
 ImvuExceptionFilter.include(Exception)
 ImvuExceptionFilter.exclude(GeneratorExit)

Then, our code could just "catch" ImvuExceptionFilter.  This type of 
extension would be backwards compatible with the current except 
(FooError, BarError) tuple syntax.

I've never hacked on CPython itself, so I don't know what kind of 
changes there would be involved, but if there is sufficient pushback 
against making GeneratorExit derive from BaseException, I think this is 
a fine alternative.  Thoughts?

Chad

Chad Austin wrote:
> Hi Terry,
> 
> Thank you for your feedback.  Responses inline:
> 
> Terry Reedy wrote:
>> "Chad Austin"  wrote in message 
>> news:46CA0EFE.6020103 at imvu.com...
>> || try:
>> | result = yield chatGateway.checkForInvite({'userId': userId})
>> | logger.info('checkForInvite2 returned %s', result)
>>
>> would not
>> except GeneratorExit: 
>> solve your problem?
> 
> Yes, we could add an "except GeneratorExit: raise" clause to every place
> we currently catch Exception, but I feel like this is one of those
> things where it's hard to get it right in all places and also hard to
> cover with unit tests.  Instead, we'll have subtle bugs where finally
> clauses don't run because the GeneratorExit was swallowed.
> 
> Also, SystemExit and KeyboardInterrupt were made into BaseExceptions for
> the same reasons as I'm giving.  (As I understand it, anyway.)
> 
>> | except Exception:
>>
>> Such catchalls are known to be prone to catch too much
>> and are therefore not encouraged ;-).
>> As in 'use at your own risk'.
>> Guido encourages specific catches just for the reasons you give here.
> 
> More below:
> 
>> There was a *long* discussion of the current 2.5 exception hierarchy on 
>> pydev.  Search either python.org's or gmane's archive if you want to pursue 
>> this.  But I expect the people involved would say much the same as above.
> 
> I've actually read the background on the exception hierarchy (and agree
> with it all), especially other suggestions that GeneratorExit derive
> from BaseException.  As I understand it, Guido's objections are threefold:
> 
> 1) The previous "generators as coroutines" examples were too
> theoretical:  I've wanted GeneratorExit to derive from BaseException for
> months now, but didn't write this proposal until I actually wrote code
> that failed in the presence of task cancellation.
> 
> 2) You should avoid catching everything with except Exception:  I think
> that's too idealistic. Just do a search for try: except: through
> publicly available Python.  :)  Sometimes, you really _do_ want to catch
> everything.  When you're making a network request that involves
> xmlrpclib, urllib2, httplib, etc. you don't actually care what the error
> was.  (Well, except that the exceptions are submitted for automated
> analysis.)  Similarly, when loading a cache file with pickle, I don't
> care what went wrong, because it's not critical and should not be turned
> into a crash for the user.  (We automatically report exceptions that
> bubble into the main loop as crashes.)
> 
> 3) If GeneratorExit escapes from the generator somehow and gets raised
> in the main loop, then it will bubble out of the application like
> SystemExit and KeyboardInterrupt would:  I think this argument is
> somewhat specious, because I can't imagine how that would happen.  You'd
> have to store exceptions in your generator and explicitly bubble them
> out somehow.  Our crash handling has to specially handle
> KeyboardInterrupt and SystemExit anyway, since there are currently
> non-Exception exceptions, such as strings and custom classes that forgot
> to derive from Exception, that should count as crashes.
> 
> I personally can't think of any cases where I would _want_ to handle
> GeneratorExit.  I just want finally: and with: clauses to do the right
> thing when a task is cancelled.  Anyway, I haven't yet encountered any
> serious bugs due to this yet...  I'm just worried that if a task is
> holding some resource and blocking on something, then the resource won't
> get released.  If this really does come up, then I do have a little bit
> of python + ctypes that replaces GeneratorExit with ImvuGeneratorExit
> (deriving from BaseException), but that's not very appealing.
> 
> Thanks again,
> 

-- 
Chad Austin
http://imvu.com/technology

From: Asun Friere <afriere at yahoo.co.uk>
To: python-list at python.org
Date: Tue, 21 Aug 2007 00:41:59 -0700
Subject: Re: Newbee Question

 Oh well since a few solutions have already been posted I thought I
might add another, just so you at the very least you have to do some
work making up your mind which one to choose.  Using an incremental
approach just to be different ...

from decimal import Decimal

normal = Decimal('0.04')
over = Decimal('1.40)

def calcStopPay (stops) :
    pay = Decimal('0.00')
    while stops :
        incr = normal if stops < 23 else over
        pay += incr
        stops -= 1
    return pay

#testing:
for x in range(50) :
    print "Stop pay for %s stops: $%s" % (x, calcStopPay(x))


From: Ron Garret <rNOSPAMon at flownet.com>
To: python-list at python.org
Date: Tue, 21 Aug 2007 00:42:45 -0700
Subject: Re: Is there a way to change the default string encoding?

 In article ,
 Peter Otten <__peter__ at web.de> wrote:

> If all else fails there's
> 
> >>> sys.setdefaultencoding("latin1")
> >>> "Andre\xe9 Ramel".decode()
> u'Andre\xe9 Ramel'
> 
> but that's an evil hack, you should rather talk to the maintainer of the
> offending code to update it to accept unicode.

Yes, but I need to hack around it until I can get it fixed.

Thanks!

rg

From: Fabio Z Tessitore <fabioztessitore at libero.it>
To: python-list at python.org
Date: 21 Aug 2007 07:44:46 GMT
Subject: Re: Is there a way to change the default string encoding?

 Il Mon, 20 Aug 2007 18:44:39 -0700, Ron Garret ha scritto:

> Is there a way to change the default string encoding ...

Dive Into Python. Section 9 on http://diveintopython.org/xml_processing/
unicode.html

That will help.

Bye
Fabio

From: Asun Friere <afriere at yahoo.co.uk>
To: python-list at python.org
Date: Tue, 21 Aug 2007 00:51:45 -0700
Subject: Re: Newbee Question

 On Aug 21, 5:41 pm, Asun Friere  wrote:
> over = Decimal('1.40)
oops, that should of course be:
over = Decimal('1.40')


From: Peter Otten <__peter__ at web.de>
To: python-list at python.org
Date: Tue, 21 Aug 2007 09:49:56 +0200
Subject: Re: Is there a way to change the default string encoding?

 Ron Garret wrote:

> In article ,
>  Peter Otten <__peter__ at web.de> wrote:
> 
>> If all else fails there's
>> 
>> >>> sys.setdefaultencoding("latin1")
>> >>> "Andre\xe9 Ramel".decode()
>> u'Andre\xe9 Ramel'
>> 
>> but that's an evil hack, you should rather talk to the maintainer of the
>> offending code to update it to accept unicode.
> 
> Yes, but I need to hack around it until I can get it fixed.

Oops, the snippet above omits the actual hack. It should be

>>> import sys
>>> reload(sys)

>>> sys.setdefaultencoding("latin1")
>>> "Andre\xe9 Ramel".decode()
u'Andre\xe9 Ramel'

Peter

From: Asun Friere <afriere at yahoo.co.uk>
To: python-list at python.org
Date: Tue, 21 Aug 2007 00:54:53 -0700
Subject: Re: Newbee Question

 On Aug 21, 5:51 pm, Asun Friere  wrote:
> On Aug 21, 5:41 pm, Asun Friere  wrote:> over = Decimal('1.40)
>
> oops, that should of course be:
> over = Decimal('1.40')

oh boy ... and it should also be
normal = Decimal('0.40')

I really need to test before posting ...


From: Dennis Lee Bieber <wlfraed at ix.netcom.com>
To: python-list at python.org
Date: Tue, 21 Aug 2007 00:57:39 -0700
Subject: Re: yet another indentation proposal

 On Mon, 20 Aug 2007 04:51:06 GMT, James Stroud 
declaimed the following in comp.lang.python:


> What's wrong with just saying the current indent level? I'd much rather 
> hear "indent 4" than "tab tab tab tab".
>
 Well... the latter doesn't require a Python aware vocalizer... 

 Though yes... something that would report on repeated "whitespace"
would be nicer... "four-tabs" vs "32-spaces" 

-- 
 Wulfraed Dennis Lee Bieber  KD6MOG
 wlfraed at ix.netcom.com  wulfraed at bestiaria.com
  HTTP://wlfraed.home.netcom.com/
 (Bestiaria Support Staff:  web-asst at bestiaria.com)
  HTTP://www.bestiaria.com/

From: Dennis Lee Bieber <wlfraed at ix.netcom.com>
To: python-list at python.org
Date: Tue, 21 Aug 2007 00:57:39 -0700
Subject: Re: datetime in microseconds

 On Mon, 20 Aug 2007 07:58:42 -0700, mroeloffs at gmail.com declaimed the
following in comp.lang.python:


>         microsecs -= 31536000000000           # -1 Year

 There is no "year 0", one goes from 1 BC to AD 1

>         microsecs -= 1123200000000            # -13 Days (magic?)

 Sounds like the conversion from Julian to Gregorian calendars...


 I wonder what would result if one converted your microseconds into
fraction days, and fed that to a JD to calendar conversion.
-- 
 Wulfraed Dennis Lee Bieber  KD6MOG
 wlfraed at ix.netcom.com  wulfraed at bestiaria.com
  HTTP://wlfraed.home.netcom.com/
 (Bestiaria Support Staff:  web-asst at bestiaria.com)
  HTTP://www.bestiaria.com/

From: Dennis Lee Bieber <wlfraed at ix.netcom.com>
To: python-list at python.org
Date: Tue, 21 Aug 2007 00:57:39 -0700
Subject: Re: Newbee Question

 On Mon, 20 Aug 2007 07:51:10 -0700, kyosohma at gmail.com declaimed the
following in comp.lang.python:

> On Aug 20, 9:23 am, "HD1956"  wrote:
> > This is probably a simple code. I am a truck driver who gets paid by
> > stops and cases. I am trying to figure out how to code my stop pay. I
> > get 40 cents per stop up to 22 stops, and $1.40 per stops after that.
> 
> def calc(num):
>  if num < 23:
>   return 0.4 * num
>  else:
>   overtime = num - 22
>   x = 0.4 * 22
>   x += overtime * 1.4
>   return x
> 
> # Use your own brain next time
> 
> Mike

 pay = min(num, 22) * 0.4 + max(num-22, 0) * 1.4
-- 
 Wulfraed Dennis Lee Bieber  KD6MOG
 wlfraed at ix.netcom.com  wulfraed at bestiaria.com
  HTTP://wlfraed.home.netcom.com/
 (Bestiaria Support Staff:  web-asst at bestiaria.com)
  HTTP://www.bestiaria.com/

-- 
http://mail.python.org/mailman/listinfo/python-list

       
---------------------------------
Boardwalk for $500? In 2007? Ha! 
Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.
       
---------------------------------
Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. 
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From jeff.fw at gmail.com  Wed Aug 29 10:33:28 2007
From: jeff.fw at gmail.com (Jeff)
Date: Wed, 29 Aug 2007 14:33:28 -0000
Subject: Creating a multi-tier client/server application
In-Reply-To: <46d57888$0$295$426a74cc@news.free.fr>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
	<46d57888$0$295$426a74cc@news.free.fr>
Message-ID: <1188398008.538820.21960@d55g2000hsg.googlegroups.com>

> You could explore something like a custom-made GUI client app
> communicating thru the http protocol with a web-server app. http is just
> a protocol, and it doesn't necessarily imply using html and a browser...
> IIRC, some GUI toolkits uses XML description files for the UI.

That, or something similar, may be what I do.  It would mean, however,
developing my own method for transferring objects across the network,
which, as far as I can tell, is what things like Pyro are supposed to
take care of.


> > 3) Easier to "lock down" who's using the program by only
> > installing it on certain machines.
>
> Not a very reliable security scheme IMHO !-)

You are 100% correct.  That will most certainly *not* be the only
means of security.  There will be user authentication against a
central LDAP server, SSL for all connections, and possibly IP address
based blocking as well.  I need to clarify what I meant (I didn't want
to bore everyone with the tedious details)--while this system will
mostly be used by supervisors/managers, the employees will also be
using it to sign into their shifts.  The managers want the employees
to only be able to sign in from designated machines, while at the same
time they want them to be able to look up their schedules from a web
interface, but *not* use that to sign in.  That wasn't the best point,
but I think there's something to be said of the *perceived* security
of desktop vs. web apps.

> Extreme Programming doesn't mean "no preparation", and makes heavy use
> of use cases. Of course you need to have some - hopefully accurate -
> functional specs. The point was mostly along the lines of "don't try to
> have full-featured detailed design before you start coding, because
> chances are it will be wrong".
>
> > Hopefully, the amount of planning will be somewhere in between that
> > and the bureaucratic nightmare of documenting up front what each
> > module, class and function will do.
>
> Which would be totally non-sensical. I don't believe anyone on earth
> could come up with such a thing - done right - *before* the application
> is written.

I'm not looking to layout how the GUI should look, or even how
individual parts of it should work.  What I need to do, though, is
write very detailed specs with my clients on the data that will be
used, and plan out as thoroughly as possible the architecture of the
project as far as tiers and such.  I don't have much choice in this
aspect, sadly.  But, in my experience, the more detail (and agreement
on those details) I have up front, the less painful the rest of the
process will be.

Thanks again!



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Aug 28 15:36:15 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 28 Aug 2007 21:36:15 +0200
Subject: localhost, ?!
References: <fb1id4$kpp$1@localhost.localdomain>
Message-ID: <5jjbpfF3sm4m7U2@mid.individual.net>

Boris Ozegovic wrote:

> At job:
> urllib2.urlopen("http://localhost")
> raise BadStatusLine(line), after half a minute.

Looks like name resolving problems.
 
> urllib2.urlopen("http://127.0.0.1")
> HTTP Error 503: Service Unavailable, immediately.

Definitely a problem with the web server (503 means "service
unavailable").
 
> Anybody have slightest clue wthat is going on?  :-/

Try using wireshark or a similar tool to see what's going on on
protocol level.

Regards,


Bj?rn

-- 
BOFH excuse #103:

operators on strike due to broken coffee machine



From srikrishnamohan at gmail.com  Thu Aug  2 08:13:27 2007
From: srikrishnamohan at gmail.com (km)
Date: Thu, 2 Aug 2007 17:43:27 +0530
Subject: beginner in python
In-Reply-To: <aa405c1f0708020425w12407dcfldb78540d19aa4990@mail.gmail.com>
References: <aa405c1f0708020425w12407dcfldb78540d19aa4990@mail.gmail.com>
Message-ID: <f4cc03640708020513v7f2804cfucabef3b6fbb0c35b@mail.gmail.com>

Hi

pls redefine ur problem.
I donot understand what u wanted to accomplish .
is it that u wanted to check and represent the redundant entry numbers as
one entry or is it
 with the isoform id as a single entry and without considering other data
like start  and stop ?

also observe that when u consider the whole line in the data file, they are
all unique - there is no redundancy.

KM
-----------------------------------------------------------
On 8/2/07, Beema shafreen <beema.shafreen at gmail.com> wrote:
>
> Hi everybody ,
>       I am a beginner in python,
>          I have to fetch the redundant entries from a file,
>
> code:
>
> import re
> L = []
> fh = open('ARCHITECTURE_MAIN.txt', 'r')
> for line in fh.readlines():
>         data =line.strip()
> #       splitted = data.split('#')
>         L.append(data)
> fh.close()
>
>
> M=L
> for x in L:
>         x = x.split('#')
>         for y in M:
>             y = y.split('#')
>         x_data = x[0],x[1],x[2],x[3]
>         #print x_data
>         y_data = y[0],y[1],y[2],y[3]
>         #print y_dat
>         if x_data[0] == y_data[0]:
>               print x_data
>
>
> i get the result as a tupule,
> the text file which has datas separated by hash
> entry#isoform#start#stop#  i have to check upto this
>
> 00250_1#ARCH_104#61#89#Literature#9224948#00250####
> 00250_1#ARCH_104#97#126#Literature#9224948#00250####
> 00250_1#ARCH_104#139#186#Literature#9224948#00250####
> 00251_1#ARCH_463#7#59#SMART##00251####
> 00251_1#ARCH_463#91#121#SMART##00251####
> 00251_1#ARCH_463#251#414#SMART##00251####
> 00251_1#ARCH_463#540#624#SMART##00251####
> 00252_1#ARCH_474#1#21#Literature#8136357#00252####
> 00252_1#ARCH_393#481#501#Literature#8136357#00252####
> 00252_1#ARCH_463#523#553#SMART##00252####
> 00253_1#ARCH_82#37#362#SMART##00253####
> 00253_1#ARCH_54#365#522#SMART##00253####
> 00253_1#ARCH_104#589#617#SMART##00253####
> 00253_1#ARCH_104#619#647#SMART##00253####
> 00253_1#ARCH_104#684#712#SMART##00253####
> 00254_1#ARCH_82#27#352#SMART##00254####
> 00254_1#ARCH_54#355#510#SMART##00254####
> 00254_1#ARCH_104#576#604#SMART##00254####
> 00254_1#ARCH_104#606#634#SMART##00254####
> 00254_1#ARCH_104#671#699#SMART##00254####
> 00255_1#ARCH_82#56#425#SMART##00255####
> 00255_1#ARCH_54#428#582#SMART##00255####
> 00255_1#ARCH_104#696#724#SMART##00255####
>
>
>
>
> can you suggest me ,what are the improvement i have to make in the above
> code
> regards
> shafreen
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From steve at holdenweb.com  Thu Aug 16 17:42:11 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Aug 2007 17:42:11 -0400
Subject: Pass by reference or by value?
In-Reply-To: <496954360708161402x58faba47x7a6eae6e68f81d4@mail.gmail.com>
References: <496954360708161402x58faba47x7a6eae6e68f81d4@mail.gmail.com>
Message-ID: <fa2gbe$uq7$1@sea.gmane.org>

Robert Dailey wrote:
> Hi,
> 
> I previously created a topic named "Pass by reference or by value" where 
> I inquired on how python's function parameters work. I received a lot of 
> nice responses, however I'm still confused on the topic. Note that I 
> come from a C++ background to Python, so any comparisons to C++ would be 
> very helpful.
> 
> I ran a few tests. There's two tests in particular I wanted to show you 
> guys:
> ------------------------------------------------------------------------------------------------
> myvar = []
> 
> def changeme( param ):
>     param.append( "blah" )
>     print param
> 
> changeme( myvar )
> 
> print myvar
> 
> The above code yields the following output:
> ['blah']
> ['blah']
> 
> This means that the list passed in was modified by the function.
> ------------------------------------------------------------------------------------------------
> Now test case 2:
> 
> myvar = 4
> 
> def changeme( param ):
>     param = 5
>     print param
> 
> changeme( myvar )
> 
> print myvar
> 
> The above code yields the following output:
> 5
> 4
> 
> This means that the integer passed in was NOT modified by the function.
> ------------------------------------------------------------------------------------------------
> 
> Between these two tests, both types passed in are mutable objects. I'm 
> having trouble figuring out what mandates an object to be changed from 
> within a function versus not. What is happening in test case 2 to cause 
> it to not be modified?
> 
> Thanks for reading guys. Hopefully one day I'll understand this lol.
> 
The first thin to realise is that all Python names are just bindings to 
values. In C++ terms you can think of them all as pointers. 
De-referencing is automatic when a value is to be retrieved.


 >>> def changeme( param ):
...     param = 3
...     print param
...
 >>> myvar = []
 >>> changeme(myvar)
3
 >>> myvar
[]
 >>>

In this case there is no attempt to mutate the argument, the argument 
name is simply bound to another value. Since the argument is a name 
local to the function, this does not result in any change outside the 
function.

In this case the argument is bound to a mutable value, so the call to 
append mutates the object (a list) referenced by the argument.

Unlike C++ and similar languages a variable does not hold a value, it 
holds a pointer to a value. When a list is passed as a function argument 
the reference to the list is copied into the argument. Does this help at 
all?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From coxy1 at netspace.net.au  Sat Aug 11 16:21:04 2007
From: coxy1 at netspace.net.au (Tony)
Date: Sun, 12 Aug 2007 06:21:04 +1000
Subject: SUCK my HUSBAND'S CUM from my CUNT
Message-ID: <20070811202122.F21781341EE@mail.netspace.net.au>

 

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From gdonald at gmail.com  Sat Aug 11 18:26:14 2007
From: gdonald at gmail.com (Greg Donald)
Date: Sat, 11 Aug 2007 17:26:14 -0500
Subject: I am giving up perl because of assholes on clpm -- switching to
	Python
In-Reply-To: <496954360708111500k6764d019p7cbf74b1df399b94@mail.gmail.com>
References: <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d@giganews.com>
	<Lc1186058698244350x8ae3b4c@earth.podro.com>
	<496954360708111500k6764d019p7cbf74b1df399b94@mail.gmail.com>
Message-ID: <15e66e4e0708111526u541bccacoc834a1e51815f233@mail.gmail.com>

On 8/11/07, Robert Dailey <rcdailey at gmail.com> wrote:
> I had this very same problem with the doxygen mailing list... doxygen is
> such a great tool but full of assholes in their mailing list.

I'm not defending any assholes you may have ran into, but I find the
thing to do is only ask questions in such a way that no one can
possibly have a reason to be an asshole.

http://catb.org/~esr/faqs/smart-questions.html


-- 
Greg Donald
http://destiney.com/


From arkanes at gmail.com  Thu Aug 30 16:38:14 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 30 Aug 2007 15:38:14 -0500
Subject: gc.garbage
In-Reply-To: <1188505827.505656.243400@z24g2000prh.googlegroups.com>
References: <1188467173.708043.44800@w3g2000hsg.googlegroups.com>
	<46D692FC.4030805@v.loewis.de>
	<1188498335.633506.90050@q4g2000prc.googlegroups.com>
	<mailman.157.1188499024.28954.python-list@python.org>
	<1188505827.505656.243400@z24g2000prh.googlegroups.com>
Message-ID: <4866bea60708301338k5066a908s7e9944ebdc1b3765@mail.gmail.com>

On 8/30/07, 7stud <bbxx789_05ss at yahoo.com> wrote:
> On Aug 30, 12:36 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> > On 8/30/07, 7stud <bbxx789_0... at yahoo.com> wrote:
> >
> > > On Aug 30, 3:50 am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > > > > gc.set_debug(gc.DEBUG_LEAK)
> > > > > print gc.garbage
> >
> > > > > --output:--
> > > > > []
> > > > > gc: uncollectable <Dog 0x56e10>
> > > > > gc: uncollectable <Cat 0x56e30>
> > > > > gc: uncollectable <dict 0x58270>
> > > > > gc: uncollectable <dict 0x43e40>
> >
> > > > gc.garbage is filled only after these messages
> > > > are printed, not before. You need to add an explicit
> > > > call to gc.collect() if you want to see what
> > > > uncollectable garbage you have.
> >
> > > > Regards,
> > > > Martin
> >
> > > Hi,
> >
> > > Thanks for the response.  I had a cut and paste error in my reply, so
> > > here it is again with the corrections...
> >
> > > Now, if I run the code:
> >
> > > ------------
> > > import gc
> >
> > > class Cat(object):
> > >     def __del__():
> > >         pass
> >
> > > class Dog(object):
> > >     def __del__():
> > >         pass
> >
> > > def some_func():
> > >     the_dog = Dog()
> > >     the_cat = Cat()
> > >     the_dog.cat = the_cat
> > >     the_cat.dog = the_dog
> >
> > > some_func()
> >
> > > gc.set_debug(gc.DEBUG_LEAK)
> > > gc.collect()
> > > print gc.garbage
> > > -----------
> >
> > > I get this output:
> >
> > > ----------
> > > gc: uncollectable <Dog 0x56e10>
> > > gc: uncollectable <Cat 0x56e30>
> > > gc: uncollectable <dict 0x58300>
> > > gc: uncollectable <dict 0x43e40>
> > > [<__main__.Dog object at 0x56e10>, <__main__.Cat object at 0x56e30>,
> > > {'cat': <__main__.Cat object at 0x56e30>}, {'dog': <__main__.Dog
> > > object at 0x56e10>}]
> > > -----------
> >
> > > Why are there two entries in the list for each uncollectable
> > > object(same addresses)?  Also, I haven't bound the names "cat" or
> > > "dog" anywhere in my program.  What do those names mean in the list?
> >
> > Read your output carefully!
> >
> > gc.garbage is a list of objects. The objects are printed just as they
> > would be anywhere else in Python. You've got the dog object, the cat
> > object, and the __dict__ of each instance.
> >
> >
>
> Ah.  I missed the braces inside the list, but I still don't understand
> where the names "cat" and "dog" come from.
>

What happens when you print a dictionary?

>
> > DEBUG_SAVEALL is set, then all unreachable objects will be added to
> > this list rather than freed."
>
> What is the definition of an "unreachable object"?  If I add the
> following:
>

Anything that the gc would have collected.

> -----
> y = Cat()
> del y
> -----
>
> That object doesn't make it into gc.garbage.

Because it's already dead. In your previous code, you made dog and cat
unreachable by virtue of making them a refcycle.

>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From tjreedy at udel.edu  Mon Aug 20 09:22:28 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 20 Aug 2007 09:22:28 -0400
Subject: Where we need to use Python ?
References: <1187596936.136499.200280@l22g2000prc.googlegroups.com>
Message-ID: <fac4jr$im7$1@sea.gmane.org>


<gperumal at gmail.com> wrote in message 
news:1187596936.136499.200280 at l22g2000prc.googlegroups.com...
| And Is it a interpreted language or a programming language
| It comes in which category

Python is an algorithm programming language.

The CPython implementation of the langauge compiles Python to proprietary 
byte code and then interprets the byte code.
The Jython implementation compiles to javacode which is then handled 
however by a Java runtime.
The IronPython implementation compiles to the .NET language handled by the 
.NET runtime.
The PyPy implementation acts similarly to CPython, I believe, but can also 
compile a subset of the language to C or other low level languages that can 
be compiled to object code.  There are other projects that compile subsets, 
possible with additional instructions to the compiler.

Do visit www.python.org and take a look around.  The documentation section 
has a tutorial that will give an experienced programmer a good overview in 
just a few hours.

tjr







From carsten at uniqsys.com  Sat Aug  4 19:38:07 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Sat, 04 Aug 2007 19:38:07 -0400
Subject: Encoding DeprecationWarning
In-Reply-To: <1186267926.233392.238460@w3g2000hsg.googlegroups.com>
References: <1186254427.792114.173170@q75g2000hsh.googlegroups.com>
	<mailman.1623.1186255457.22759.python-list@python.org>
	<1186267419.999613.209480@q75g2000hsh.googlegroups.com>
	<1186267926.233392.238460@w3g2000hsg.googlegroups.com>
Message-ID: <1186270687.3272.9.camel@localhost.localdomain>

On Sat, 2007-08-04 at 15:52 -0700, oliver at obeattie.com wrote:
> On Aug 4, 11:43 pm, "oli... at obeattie.com" <oli... at obeattie.com> wrote:
> > >>> from wt.lib.misc_lists import all_countries
> >
> > __console__:1: DeprecationWarning: Non-ASCII character '\xc3' in file /
> > Django/wt/../wt/lib/misc_lists.py on line 141, but no encoding
> > declared; seehttp://www.python.org/peps/pep-0263.htmlfor details
> 
> OK, well; no matter. Perhaps I should try actually reading the article
> it recommended

Right, that's why I asked you to post the full warning message, to get
you to take another look at it. Mission accomplished ;)

-- 
Carsten Haese
http://informixdb.sourceforge.net




From tommy.nordgren at comhem.se  Sat Aug 25 16:18:29 2007
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Sat, 25 Aug 2007 22:18:29 +0200
Subject: Any python Module for generating DocBook?
Message-ID: <C15CC70F-4403-4F08-80EC-9A9EEB549C50@comhem.se>

Do anyone on this list know of a Python module for generating DocBook
programlisting elements for programming language source code
merked with special comments.
I want to write a programming book, and want to mark significant  
lines in the
source code for reference. My DocBook processing software xmlint,  
xsltproc, and fop,
don't support numbering lines, when including source files via  
<xi:include parse="text" ...

------
What is a woman that you forsake her, and the hearth fire and the  
home acre,
to go with the old grey Widow Maker.  --Kipling, harp song of the  
Dane women
Tommy Nordgren
tommy.nordgren at comhem.se





From tjreedy at udel.edu  Fri Aug  3 15:11:00 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 3 Aug 2007 15:11:00 -0400
Subject: (no) fast boolean evaluation ? missing  NOT
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl><mailman.1545.1186095368.22759.python-list@python.org><1186096979.397596.36640@e16g2000pri.googlegroups.com>
	<eb4fb$46b2f7a6$d443bb3a$21643@news.speedlinq.nl>
Message-ID: <f8vuk5$glb$1@sea.gmane.org>


"Stef Mientki" <S.Mientki-nospam at mailbox.kun.nl> wrote in message 
news:eb4fb$46b2f7a6$d443bb3a$21643 at news.speedlinq.nl...
| John Machin wrote:
| So now I'm left with just one question:
| for bitwise operations I should use &, |, ^
| for boolean operations I should use and, or, xor
| but after doing some test I find strange effects:
| >>> A = 4
| >>> B = 5
| >>> A and B
| 5

>>> B and A
4

| >>> A & B
| 4
| >>> A or B
| 4

>>> B or A
5

| >>> A | B
| 5
|
| So if I use the bitwise operation on integers,
|   "and" changes into (bitwise) "or" and vise versa.

No, you hypnotised yourself by generalizing from insufficient data.
Repeat experiment with, for instance, 3 and 4 instead of 4 and 5.  Then 3&4 
= 0, 3|4 = 7.

tjr





From vasudevram at gmail.com  Fri Aug 31 14:13:05 2007
From: vasudevram at gmail.com (vasudevram)
Date: Fri, 31 Aug 2007 18:13:05 -0000
Subject: Joining Big Files
In-Reply-To: <1188157393.234494.62500@w3g2000hsg.googlegroups.com>
References: <1188035844.616831.205350@i38g2000prf.googlegroups.com>
	<1188090939.364787.296630@r34g2000hsd.googlegroups.com>
	<1188092913.645157.15370@o80g2000hse.googlegroups.com>
	<1188139515.349468.315290@q5g2000prf.googlegroups.com>
	<1188157393.234494.62500@w3g2000hsg.googlegroups.com>
Message-ID: <1188583985.639319.297240@r23g2000prd.googlegroups.com>

On Aug 27, 12:43 am, mcl <mcl.off... at googlemail.com> wrote:
> All,
>
> Thank you very much.
>
> As my background is much smaller memory machines than today's giants -
> 64k being abigmachine and 640k being gigantic. I get very worried
> about crashing machines when copying or editingbigfiles, especially
> in a multi-user environment.
>
> Mr Knuth - that brings back memories.  I rememeber implementing some
> of his sort routines on a mainframe with 24 tape units and an 8k drum
> and almost eliminating one shift per day of computer operator time.
>
> Thanks again
>
> Richard

I can imagine ... though I don't go back that far.
Cool ...

Vasudev



From nick at craig-wood.com  Wed Aug 29 06:30:08 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 29 Aug 2007 05:30:08 -0500
Subject: Haskell like (c:cs) syntax
References: <fb25uh$gl9$1@online.de>
	<4866bea60708281512q31635803x1b025274c94caf7e@mail.gmail.com>
	<mailman.86.1188340264.28954.python-list@python.org>
Message-ID: <slrnfdahld.aai.nick@irishsea.home.craig-wood.com>

Erik Jones <erik at myemma.com> wrote:
>  front, last = l[:len(l) - 1], l[len(l) - 1]

Normally written as

  front, last = l[:-1], l[-1]

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


From grante at visi.com  Wed Aug 29 10:22:42 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 29 Aug 2007 14:22:42 -0000
Subject: self extracting zipefile (windows) and (standard module) zipefile
References: <1188388421.010643.19050@50g2000hsm.googlegroups.com>
	<1188393907.080206.246270@y42g2000hsy.googlegroups.com>
Message-ID: <13db09i6rrnjc22@corp.supernews.com>

On 2007-08-29, Hyuga <hyugaricdeau at gmail.com> wrote:

>> I try to read (and extract) some "self extracting" zipefiles
>> on a Windows system. The standard module zipefile seems not to
>> be able to handle this. [...]
>
> First of all, there's really no such thing as a "self
> extracting zipefile".

Perhaps there isn't "really such a thing," but that's the
commonly used name for the type of file the OP is dealing with.

> [...] You'll have to execute it--there's no way you can
> operate on it like a normal zip file.

Executing the file is a huge, huge security risk.

Other zip tools (e.g. the "unzip" utility for Linux) seem know
how to work with self-extracting zipfiles.  Unfortunately there
are multiple slightly different zip formats along with mutlple
"self-extracting zip file" formats. Nonetheless, I've never run
across one I couldn't unzip without executing it.  On Linux,
I'd probably just try exec'ing the "unzip" program.  

Another option is to search through the file from the beginning
looking for whatever signature matches the beginning of a
"normal" zip file.  The self-extracting zipfiles that I've
dissected are just an executable image concatenated with a
"normal" zipfile.  If you just start searching from the
beginning of the file, it's simple to find the actual zip data
and copy it into a separate file which then can be unzipped
like any other plain zipfile.  I haven't done that for many
years since the normal zip tools that I use can operate on
self-extracting files.

-- 
Grant Edwards                   grante             Yow! NEWARK has been
                                  at               REZONED!!  DES MOINES has
                               visi.com            been REZONED!!


From pachiburke at gmail.com  Mon Aug 20 06:40:30 2007
From: pachiburke at gmail.com (pachiburke at gmail.com)
Date: Mon, 20 Aug 2007 03:40:30 -0700
Subject: best GUI library for vector drawing program
In-Reply-To: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
References: <1187357244.883516.79840@j4g2000prf.googlegroups.com>
Message-ID: <1187606430.924141.134800@g4g2000hsf.googlegroups.com>

On Aug 17, 3:27 pm, chewie54 <dfabrizi... at gmail.com> wrote:

> What would be the best cross-platform GUI library to use for a vector
> based CAD program ( something like Visio on Windows )   WxWidgets,
> Tk,   PyQt,  Java Swing,  Java SWT,????   I need the capibility to
> draw and edit in a window that looks like a page of paper so WYSIWYG
> is very important,  and I need to save the drawings in vector based
> file formats like PS, EPS,  SVG, as well as image formats like jpg,
> png, and gif.  Also, the images need to be high resolution so that
> they can be pasted into various other programs in Windows OS,  and
> Linux OS,  and the Mac OS.

You could use pythoncad (www.pythoncad.org) as a base and develop it
further, or even contract its main developer to expand its features to
fulfill your needs and improve it. It's based on the GTK+ toolkit,
written in python and has scripting capabilities. IMHO, it's the most
promising free CAD effort around though even if it's not as mature as
QCad.
You could use it in commercial applications as long as you comply with
the GPL, or the author agrees to dual license it for you, but it would
be very welcome if the improvements are avaliable for all users.

Regards,

Rafael



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Aug  6 03:58:04 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 06 Aug 2007 09:58:04 +0200
Subject: Best programs written completly in Python
In-Reply-To: <1186338373.738163.257890@o61g2000hsh.googlegroups.com>
References: <vh8bb3h0bpc9c3f1v50tchb0sejr7j7smt@4ax.com>
	<1186338373.738163.257890@o61g2000hsh.googlegroups.com>
Message-ID: <46b6d47b$0$647$426a74cc@news.free.fr>

markacy a ?crit :
> On 5 Sie, 12:14, Franz Steinh?usler <franz.steinhaeus... at gmx.at>
> wrote:
>> Hello NG,
>>
>> wWhat are the best programs in your opinion, written entirly
>> in pyhton, divided into categories like:
>> a) Games
>> b) Utilities/System
>> c) Office
>> d) Web/Newsreader/Mail/Browser
>> ...
>>
>> I don't want to start a long thread, if a site of such
>> an discussion already exists, a link will be enough.
>>
>> Many thanks in advance!
>>
>> --
>> Franz Steinhaeusler
> 
> I guess, that gentoo's portage is (almost?) entirely written in
> python.

IIRC, yes (or perahps does it use a couple bash scripts too).

> The same is with Zope/Plone

"Zope/Plone" makes two distinct applications : the web application 
server Zope, and the CMS Plone.

> (Web category), though I know,
> that Zope has some parts of code written in C.

Yes. Mostly for low-level parts that couldn't be done in pure Python, at 
least by the time they were written.

> Django?

Then mention CherryPy, Turbogears and Pylons (and *quite* a lot of web 
frameworks FWIW) too !-)

Oh, and yes, there's Twisted too...


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Aug  8 07:55:11 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 08 Aug 2007 13:55:11 +0200
Subject: Seek the one billionth line in a file containing 3 billion lines.
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
	<f9bp75$vbq$03$1@news.t-online.com>
Message-ID: <5htp8sF3m6tquU1@mid.individual.net>

Peter Otten wrote:

> n = 10**9 - 1
> assert n < sys.maxint
> f = open(filename)
> wanted_line = itertools.islice(f, n, None).next()
> 
> should do slightly better than your implementation.

It will do vastly better, at least in memory usage terms, because
there is no memory eating range call.

Regards,


Bj?rn

-- 
BOFH excuse #31:

cellular telephone interference



From heikki at osafoundation.org  Fri Aug 10 00:47:40 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Thu, 09 Aug 2007 21:47:40 -0700
Subject: wxPython before MainLoop
In-Reply-To: <13bl9a75laqcm70@corp.supernews.com>
References: <13bl9a75laqcm70@corp.supernews.com>
Message-ID: <6a6dnfbbFJNzcCbbnZ2dnUVZ_oudnZ2d@comcast.com>

[david] wrote:
> I'd like to refresh the display before I start the main loop.

We have this kind of situation in Chandler, where we display and update
the splash screen before we enter MainLoop.

1. Create app object
   http://lxr.osafoundation.org/source/chandler/Chandler.py#080

2. During app object creation, in OnInit, put up splash screen and update it

http://lxr.osafoundation.org/source/chandler/application/Application.py#433

3. The splash screen refresh is basically: draw new stuff,
self.Layout(), self.Update(), wx.Yield()
http://lxr.osafoundation.org/source/chandler/application/Application.py#1421

3. Start MainLoop
   http://lxr.osafoundation.org/source/chandler/Chandler.py#086

-- 
  Heikki Toivonen


From aahz at pythoncraft.com  Thu Aug 23 16:48:14 2007
From: aahz at pythoncraft.com (Aahz)
Date: 23 Aug 2007 13:48:14 -0700
Subject: Problems with threading in embedded Python
References: <mailman.2129.1187387690.22759.python-list@python.org>
Message-ID: <fakrqe$mcu$1@panix3.panix.com>

In article <mailman.2129.1187387690.22759.python-list at python.org>,
Nico Blodow  <nicoblodow at gmx.net> wrote:
>
>I hope this hasn't been brought up before, but if it did i missed it,
>so bear with me please :) anyway, i'm trying to embed Python into a C
>program. A sample python syript i want to run is as follows:

Looks like nobody here wants to touch this, maybe try
http://mail.python.org/mailman/listinfo/capi-sig
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From sturlamolden at yahoo.no  Fri Aug 10 11:08:31 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: Fri, 10 Aug 2007 08:08:31 -0700
Subject: High performance binary data
In-Reply-To: <1186705614.728812.284460@j4g2000prf.googlegroups.com>
References: <1186705614.728812.284460@j4g2000prf.googlegroups.com>
Message-ID: <1186758511.702475.281150@i38g2000prf.googlegroups.com>

On Aug 10, 2:26 am, Steve <steve.mo... at gmail.com> wrote:
> I want to ready binary data from a udp socket effeciently as possible
> in python.  I know of the struct package but do people have any tips
> when dealing with binary data in python?  Is there a library or api
> that is faster when dealing with binary data. I am looking for a any
> one with experience or ideas on the subject.  Pointers any one?

I would recommend NumPy for manipulating binary data. It is primarily
intended for numerics, but it is excellent for dealing with any kind
of binary data as well. It can handle mutable buffers of any kind of
integer or float, as well as arrays of C-like structs (record arrays
in numpy). You can typecast and create subarrays without copying any
data, simply by providing a new "view" into the buffer. You can also
get access to strided subsections without creating copies. And it is
very fast.

www.scipy.org



From carsten at uniqsys.com  Wed Aug 29 22:33:32 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 29 Aug 2007 22:33:32 -0400
Subject: Is LOAD_GLOBAL really that slow?
In-Reply-To: <aac2c7cb0708291823h15e3f675mbeae9ecf37d653b6@mail.gmail.com>
References: <aac2c7cb0708291823h15e3f675mbeae9ecf37d653b6@mail.gmail.com>
Message-ID: <1188441212.3251.39.camel@localhost.localdomain>

On Wed, 2007-08-29 at 19:23 -0600, Adam Olsen wrote:
> It seems a common opinion that global access is much slower than local
> variable access.  However, my benchmarks show a relatively small
> difference:
> 
> ./python -m timeit -r 10 -v -s 'x = [None] * 10000
> def foo():
>   for i in x:
>     list; list; list; list; list; list; list; list; list; list' 'foo()'
> 10 loops -> 0.0989 secs100 loops -> 0.991 secs
> raw times: 0.999 0.985 0.987 0.985 0.985 0.982 0.982 0.982 0.981 0.985
> 100 loops, best of 10: 9.81 msec per loop
> 
> ./python -m timeit -r 10 -v -s 'x = [None] * 10000
> def foo():
>   mylist = list
>   for i in x:
>     mylist; mylist; mylist; mylist; mylist; mylist; mylist; mylist;
> mylist; mylist' 'foo()'
> 10 loops -> 0.0617 secs
> 100 loops -> 0.61 secs
> raw times: 0.603 0.582 0.582 0.583 0.581 0.583 0.58 0.583 0.584 0.582
> 100 loops, best of 10: 5.8 msec per loop
> 
> So global access is about 70% slower than local variable access.  To
> put that in perspective, two local variable accesses will take longer
> than a single global variable access.
> 
> This is a very extreme benchmark though.  In practice, other overheads
> will probably drop the difference to a few percent at most.  Not that
> important in my book.

Your comparison is flawed, because the function call and the inner for
loop cause a measurement offset that makes the locals advantage seems
smaller than it is. In the interest of comparing the times for just the
local lookup versus just the global lookup, I think the following
timings are more appropriate:

$ python2.5 -mtimeit -r10 -s"y=42" -s"def f(x): pass" "f(42)"
1000000 loops, best of 10: 0.3 usec per loop
$ python2.5 -mtimeit -r10 -s"y=42" -s"def f(x): x" "f(42)"
1000000 loops, best of 10: 0.331 usec per loop
$ python2.5 -mtimeit -r 10 -s"y=42" -s"def f(x): y" "f(42)"
1000000 loops, best of 10: 0.363 usec per loop

There is no loop overhead here, and after subtracting the function call
overhead, I get 31 nanoseconds per local lookup and 63 nanoseconds per
global lookup, so local lookups are just about twice as fast as global
lookups.

True, whether this difference is significant does depend on how many
name lookups your code makes and how much else it's doing, but if you're
doing a lot of number crunching and not a lot of I/O, the difference
might be significant. Also, even if using local names is only slightly
faster than using globals, it's still not slower, and the resulting code
is still more readable and more maintainable. Using locals is a win-win
scenario.

Hope this helps,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From http  Fri Aug 31 06:11:25 2007
From: http (Paul Rubin)
Date: 31 Aug 2007 03:11:25 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<1188373707.922509.205070@g4g2000hsf.googlegroups.com>
Message-ID: <7xps149foy.fsf@ruckus.brouhaha.com>

Michele Simionato <michele.simionato at gmail.com> writes:
> > http://archive.eiffel.com/doc/manuals/technology/contract/ariane/page...
> 
> That paper contains only a good think: a link to the contrarian view
> http://home.flash.net/~kennieg/ariane.html#s3.1.5

I like the contrarian article much better than the Eiffel sales pitch.


From programmer.py at gmail.com  Tue Aug 28 10:50:14 2007
From: programmer.py at gmail.com (programmer.py at gmail.com)
Date: Tue, 28 Aug 2007 14:50:14 -0000
Subject: wxpython:how to minimize to taskbar
In-Reply-To: <1188310247.587456.103440@i13g2000prf.googlegroups.com>
References: <1188310247.587456.103440@i13g2000prf.googlegroups.com>
Message-ID: <1188312614.463169.93890@k79g2000hse.googlegroups.com>

On Aug 28, 9:10 am, Jimmy <mcknight0... at gmail.com> wrote:
> I'm kinda newbie to python and wxPython. Now I'm confronting a thorny
> problem: how can I make  my program minimize to the taskbar
> represented as an ico, and when there is some message from network
> coming, it will pop out?

Warning.  I have not tested this.  I happened to have some old code
that would iconify to the system tray.  Here's what I think you need
to do.  (If it does not work, just yell and I'll try to hack something
together for you.)

Inside the ctor of your mainframe, you'll need to construct a
wxTaskBarIcon (I derive from it).  This is my code that derives from
wxTaskBarIcon.  The comments should give you a good idea of how this
thing works.  I *think* this will shove the icon in the system tray,
even if you're not `iconified` -- so only create it if you want to
show up in the system tray.

## My wxTaskBarIcon derived object...
"""
Taskbar icon.

Not much functionality here, not even a menu.  In the future, this
will be a
good place to allow dclient functionality from the systray.
"""

from wx import TaskBarIcon, EVT_TASKBAR_LEFT_DCLICK

class ddTaskBarIcon(TaskBarIcon):
    def __init__(self, icon, tooltip, frame):
        TaskBarIcon.__init__(self)
        self.SetIcon(icon, tooltip)
        self.frame = frame

        #
        # At the very least, restore the frame if double clicked.  Add
other
        # events later.
        #
        self.Bind(EVT_TASKBAR_LEFT_DCLICK, self.on_left_dclick)

    def on_left_dclick(self, e):
        if self.frame.IsIconized():
            self.frame.Iconize(False)
        if not self.frame.IsShown():
            self.frame.Show(True)
        self.frame.Raise()

    def CreatePopupMenu(self):
        """
        Override with menu functionality, later.
        """
        return None

Next is where I use it in my wxFrame derived object.  This is the code
in my ctor.
    # ddTaskBarIcon is defined above...
    self.trayicon = ddTaskBarIcon(self.frame_icon, "Dap Daemon", self)

    # Handle the window being `iconized` (err minimized)
    self.Bind(wx.EVT_ICONIZE, self.on_iconify)

    # This is the event handler referenced in the ctor above
    def on_iconify(self, e):
        """
        Being minimized, hide self, which removes the program from the
taskbar.
        """
        self.Hide()

So how does this work?  Well, the ddTaskBarIcon (err, i realize this
is a misnomer) is constructed, which puts an icon in the system tray.
The icon has a dbl-click event handler that will `raise` and show the
window if necessary.

The iconify event handler will hide the window if a minimize event
occurs.  This keeps the window from showing up in the windows taskbar.

Thats the magic.  YMMV.

FWIW - the code I reference is over 5 years old and still runs with
wxPython 2.8ish... Kudos to Robin Dunn and crew.  Great job.

jw



From tjreedy at udel.edu  Wed Aug 15 00:15:03 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 15 Aug 2007 00:15:03 -0400
Subject: FM synthesis using Numpy
References: <3657a8860708141639l7e90ebdoe844691627152e40@mail.gmail.com>
Message-ID: <f9tulg$sau$1@sea.gmane.org>


"Joost Molenaar" <dzjoost at gmail.com> wrote in message 
news:3657a8860708141639l7e90ebdoe844691627152e40 at mail.gmail.com...
| I'm trying to build a simple FM synthesizer in Python. As a beginner,
| I take 'FM synthesizer' to
| mean: "using a sine wave to control the frequency of another sine wave."

If you don't get an answer here, try the numpy/scipy list(s)





From mbrown at phys.ksu.edu  Sun Aug 19 17:53:38 2007
From: mbrown at phys.ksu.edu (yagyala)
Date: Sun, 19 Aug 2007 14:53:38 -0700
Subject: desperately in need of a tool
Message-ID: <1187560418.339131.283470@i38g2000prf.googlegroups.com>

Hi.

I recently started working for a company that has just implemented its
first set of software standards. So far, so good. Here's the problem:
one of those standards is that the comments for each routine must
indicate every other routine that it calls. As I try to keep my
routines small, and factor out methods alot, this can lead to an
enormous ammount of extra typing. I really, really, really don't want
to do this by hand. Does anyone know of a tool that could do this for
me, or at least a tool that can tell what other routines a given
routine calls that I could program against? (Preferably something that
works under pydev, but I'm not going to be choosy.)

I'm sure some will wonder about the reasoning of this standard. The
company primarily has experience writing scientific alogorythms which
can get rather long. It makes a bit more sense to document all
routines called for a very long routine, but for short routines that
primarily call other routines, as most mine do, well....

Thanks.



From steven.bethard at gmail.com  Tue Aug 14 18:41:07 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 14 Aug 2007 16:41:07 -0600
Subject: A dumb question about a class
In-Reply-To: <1187129117.868507.151980@d55g2000hsg.googlegroups.com>
References: <mailman.1887.1186955369.22759.python-list@python.org>
	<TqSdnWYzVdWvGCLbnZ2dnUVZ_saknZ2d@comcast.com>
	<mailman.1888.1186957809.22759.python-list@python.org>
	<euCdnYM4sfSHFiLbnZ2dnUVZ_gadnZ2d@comcast.com>
	<mailman.1891.1186963290.22759.python-list@python.org>
	<tvKdnY5tf7bSXyLbnZ2dnUVZ_rCtnZ2d@comcast.com>
	<1187129117.868507.151980@d55g2000hsg.googlegroups.com>
Message-ID: <h6KdnWbvz_MZsl_bnZ2dnUVZ_hKdnZ2d@comcast.com>

thattommyhallll at gmail.com wrote:
> Also, does anyone know if there is some magic that makes
> i in some_set
> loads faster than
> i in some_list

It's not magic, per se.  It's really part of the definition of the data 
type. Lists are ordered, and are slow when checking containment. Sets 
are unordered and are quick when checking containment.

When you execute ``i in some_list``, Python searches through the list 
starting at index 0, and stopping when it sees ``i`` or hits the end. In 
computational terms, this is O(n), meaning that for a list of length n, 
you'll take an amount of time proportional to n.

When you execute ``i in some_set``, Python hashes ``i``, and checks the 
set to see if it contains anything with the same hash value. On the 
average (given the Python implementation) it is probably checking at 
most one or two values. In computational terms, this is O(1), meaning 
that on the average it only takes a constant amount of time.

So if you have code doing ``if foo in bar`` more than once, you *really* 
should be using a set for ``bar``.

STeVe


From markacy at gmail.com  Thu Aug 16 03:53:59 2007
From: markacy at gmail.com (markacy)
Date: Thu, 16 Aug 2007 07:53:59 -0000
Subject: python socket usage
In-Reply-To: <mailman.2046.1187250159.22759.python-list@python.org>
References: <mailman.2046.1187250159.22759.python-list@python.org>
Message-ID: <1187250839.541105.60900@r29g2000hsg.googlegroups.com>

On 16 Sie, 09:42, O uz Yar mtepe <comp.... at gmail.com> wrote:
> Is it possible to send a data object like a tuple or a list in socket
> programming? If so how? It seems with socket module it is only possible to
> send strings.
>
> --
> O uz Yar mtepehttp://www.yarimtepe.com/en

Hi Oguz,

   why don't you make a string out of your tuple, or list, send it via
socket and make a tuple/list again?

>>> x = (1,2,3,4,5,6,7,)
>>> type(x)
<type 'tuple'>
>>> y = str(x)
>>> type(y)
<type 'str'>
>>> print y
(1, 2, 3, 4, 5, 6, 7)
>>> z = tuple(y)
>>> type(z)
<type 'tuple'>
>>>

Cheers,
Marek



From bdesth.quelquechose at free.quelquepart.fr  Wed Aug 22 01:30:50 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 22 Aug 2007 07:30:50 +0200
Subject: How to replace a method in an instance.
In-Reply-To: <mailman.258.1187971369.32294.python-list@python.org>
References: <mailman.258.1187971369.32294.python-list@python.org>
Message-ID: <46cf2789$0$423$426a74cc@news.free.fr>

Steven W. Orr a ?crit :
> In the program below, I want this instance to end up calling repmeth 
> whenever inst.m1 is called. As it is now, I get this error:
> 
> Hello from init
> inst =  <__main__.CC instance at 0x402105ec>
> Traceback (most recent call last):
>   File "./foo9.py", line 17, in ?
>     inst.m1()
> TypeError: repmeth() takes exactly 1 argument (0 given)
> 
> 
> #! /usr/bin/python
> def repmeth( self ):
>     print "repmeth"
> 
> class CC:
>     def __init__( self ):
>         self.m1 = repmeth
>         print 'Hello from init'
> 
>     def m1 ( self ):
>         print "m1"
> 
> inst = CC()
> inst.m1()
> 
> TIA

# using old-style classes:
import new

def repmeth( self ):
     print "repmeth"

class CC:
     def __init__( self ):
         self.m1 = new.instancemethod(repmeth, self, type(self))
         print 'Hello from init'

     def m1 ( self ):
         print "m1"

inst = CC()
inst.m1()

# using newstyle classes:
def repmeth( self ):
     print "repmeth"

class CC(object):
     def __init__( self ):
         self.m1 = repmeth.__get__(self, type(self))
         print 'Hello from init'

     def m1 ( self ):
         print "m1"

inst = CC()
inst.m1()

HTH


From jstroud at mbi.ucla.edu  Thu Aug 16 22:20:04 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 16 Aug 2007 19:20:04 -0700
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187311999.880853.135780@j4g2000prf.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<fa2m4s$k1g$1@daisy.noc.ucla.edu>
	<1187311999.880853.135780@j4g2000prf.googlegroups.com>
Message-ID: <fa30kk$f8n$1@zinnia.noc.ucla.edu>

beginner wrote:
> On Aug 16, 6:21 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
>>I'm afraid you've asked a non sequiter:
>>
>>euler 40% cat test.pl
>>
>>$a=$b->{"A"} ||={} ;
>>print "$a\n" ;
>>
>>$b->{"B"} = 0 ;
>>$a=$b->{"B"} ||={} ;
>>print "$a\n" ;
>>
>>$b->{"X"} = 15 ;
>>$a=$b->{"X"} ||={} ;
>>print "$a\n" ;
>>
>>euler 41% perl test.pl
>>HASH(0x92662a0)
>>HASH(0x926609c)
>>15
> 
> It is not supposed to be used this way.
> $b is supposed to be a hash-table of hash-table. If a key exists in
> $b, it points to another hash table. The $a=$b->{"A"} ||={} pattern is
> useful when you want to add records to the double hash table.
> 
> For example, if you have a series of records in the format of (K1, K2,
> V), and you want to add them to the double hash-table, you can do
> $a=$b->{K1} || ={}
> $a->{K2}=V

That's great, but the perl code you provided does not behave identically 
to the python code you provided, so your requirments were not well stated.

(Does my annoyance with perl and its ugly syntax show here?)

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From http  Fri Aug 31 03:37:20 2007
From: http (Paul Rubin)
Date: 31 Aug 2007 00:37:20 -0700
Subject: Creating a multi-tier client/server application
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
	<7xy7ft4fqg.fsf@ruckus.brouhaha.com>
	<1188479584.073309.297770@x40g2000prg.googlegroups.com>
	<1188498543.184255.213940@i13g2000prf.googlegroups.com>
Message-ID: <7xejhkkvdb.fsf@ruckus.brouhaha.com>

Jeff <jeff.fw at gmail.com> writes:
> Granted.  But what I will be writing really will take a lot of extra
> work to get even close to the level of usability needed on the web vs.
> a desktop app.  And I'll try not to write a crappy GUI ;-)

OK.  In the discussion with Chris, one factor that came up is how much
time users will spend in front of the app and the amount of data
they'll physically enter.  If it's a lot, that weighs in favor of a
desktop app.  If it's not much, then maybe some gain in UI
responsiveness isn't worth the downside of a client installation.

> Sorting certainly doesn't have to be done on the server side--in fact,
> in most cases I can think of where it would be useful for this app, it
> wouldn't have to be--in which case it's more responsive.  Certainly
> exporting, importing and printing can all be done through the web--
> I've done this plenty of times.  But there is a huge amount of
> flexibility (and, in the case of printing, guaranteed style/quality/
> layout) to be gained on the desktop.

This I don't understand at all.  How is the least bit of flexibility
or style or quality guarantees gained by a desktop app?  If you want
fancy formatting, just use Reportlab to generate a pdf on the server
and send it to the browser.

> All that said, I am most likely going to go with a desktop
> application.  In reality, I will have to do whatever my client wants.
> Thank you *very* much for all of your input--one of the first things I
> have to do is make them a list of the pros and cons of web vs. desktop
> apps--and this will help a lot.

Yes, that sounds like a good idea.  

> vanrpeter-whatever: Thanks for the support :-)  What did you use for
> networking?  What ORMs did you try (or did you skip them altogether?)

Have you ever written a serious GUI app before?  I've never done any
really fancy ones, but even the relatively simple ones I've done have
turned out to be far more time consuming than I expected.  Have you
done much concurrent programming, either with threads or something
like twisted?  You're going to have to do that to keep your gui
responsive, so you might put that on your list of things to study (in
addition to networking and databases).


From nospam at invalid.com  Sat Aug 18 18:22:45 2007
From: nospam at invalid.com (Jack)
Date: Sat, 18 Aug 2007 15:22:45 -0700
Subject: Parser Generator?
Message-ID: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>

Hi all, I need to do syntax parsing of simple naturual languages,
for example, "weather of London" or "what is the time", simple
things like these, with Unicode support in the syntax.

In Java, there are JavaCC, Antlr, etc. I wonder what people use
in Python? Antlr also has Python support but I'm not sure how good
it is. Comments/hints are welcome. 




From beema.shafreen at gmail.com  Sat Aug 18 01:58:23 2007
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Sat, 18 Aug 2007 11:28:23 +0530
Subject: swapping
Message-ID: <aa405c1f0708172258k7402e9b2ld44e24b093b5ea7b@mail.gmail.com>

hi everbody,
i have a file with data:
fhl1    fkh2
dfp1    chk1
mal3    alp14
mal3    moe1
mal3    spi1
mal3    bub1
mal3    bub3
mal3    mph1
mal3    mad3
hob1    nak1
i have  written code to check the redudant pairs
my code:
data = []
data1 = []
fh = open('sheet1','r')
for line in fh:
        if line not in data:
                data.append(line)
        else:
                print line


fh.close()
fh1 = open('sheet2','r')
for line1 in fh1:
        if line1 not in data1:
                data1.append(line1)
        else:
                print line1
fh1.close()


result:
klp5    bub1

apn1    apn2

but i have do the same for the revere ,to check the result like this for
eg:
apn2    apn1
what is the concept to do this

regards
shafreen
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From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug 29 09:45:49 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 29 Aug 2007 15:45:49 +0200
Subject: Creating a multi-tier client/server application
In-Reply-To: <1188393925.007952.313110@r29g2000hsg.googlegroups.com>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
Message-ID: <46d57888$0$295$426a74cc@news.free.fr>

Jeff a ?crit :
> Thanks for the quick responses.
> 
> I was really hoping to avoid an entirely web-based app, for a few
> reasons, not the least of which is that I've been working almost
> entirely on web apps for the past few years, and I am getting mighty
> sick of it.  A lot of that is due to the language (PHP, which I have
> since grown to hate) I had to use.  I've worked on a site for my self
> in Python (using Pylons, actually--which is excellent) which was
> vastly easier and more fun.  But I'd really like to try something
> different.
> 
> Now, of course, that's not enough reason to force such a thing onto my
> clients (when I say clients, I mean the ones that are paying for this,
> but they're really within my same department, so they actually have
> working technical knowledge.)  Some reasons for them would be (in no
> particular order): 1) More responsive and user-friendly interfaces,

You could explore something like a custom-made GUI client app 
communicating thru the http protocol with a web-server app. http is just 
a protocol, and it doesn't necessarily imply using html and a browser... 
IIRC, some GUI toolkits uses XML description files for the UI.

(snip)

> 3) Easier to "lock down" who's using the program by only
> installing it on certain machines.

Not a very reliable security scheme IMHO !-)

(snip)

> Which leads me to the discussion of planning:  
(snip)

> This system will be used, often, to figure out how much people should
> be paid (and then interface directly with the University's payroll
> system), and store lovely things like SSNs, and will also have to have
> somewhat crazy business logic to track when hourly workers are
> eligible for raises, if they took enough training classes, etc.  There
> are a lot of people with a stake in this system, and I will need to
> work with them very closely on how this should work, and they sure as
> hell don't want any surprises.  My manager even wants use cases (if
> you've never had to deal with use cases, consider yourself a lucky,
> lucky person) which I am going to attempt to argue as that is even
> going *too* far.
> 
> So, long story short (too late), no Extreme Programming for me.

Extreme Programming doesn't mean "no preparation", and makes heavy use 
of use cases. Of course you need to have some - hopefully accurate - 
functional specs. The point was mostly along the lines of "don't try to 
have full-featured detailed design before you start coding, because 
chances are it will be wrong".

> Hopefully, the amount of planning will be somewhere in between that
> and the bureaucratic nightmare of documenting up front what each
> module, class and function will do.

Which would be totally non-sensical. I don't believe anyone on earth 
could come up with such a thing - done right - *before* the application 
is written.


From ehsan.khoddam at gmail.com  Fri Aug  3 17:41:52 2007
From: ehsan.khoddam at gmail.com (Ehsan)
Date: Fri, 03 Aug 2007 14:41:52 -0700
Subject: regexp problem in Python
Message-ID: <1186177312.117581.129910@d55g2000hsg.googlegroups.com>

I want to find "http://www.2shared.com/download/1716611/e2000f22/
Jadeed_Mlak14.wmv?tsid=20070803-164051-9d637d11"  or 3gp instead of
wmv in the text file like this :
<html>
""some code""
function reportAbuse() {
    var windowname="abuse";
    var url="/abuse.jsp?link=" + "http://www.2shared.com/file/1716611/
e2000f22/Jadeed_Mlak14.html";
    OpenWindow =
window.open(url,windowname,'toolbar=no,scrollbars=no,resizable=no,width=500,height=500,left=50,top=50');
    OpenWindow.focus();
  }
  function startDownload(){
    window.location = "http://www.2shared.com/download/1716611/
e2000f22/Jadeed_Mlak14.wmv?tsid=20070803-164051-9d637d11";
    //document.downloadForm.submit();
  }
  </script>
</head>
</html>http://www.2shared.com/download/1716611/e2000f22/
Jadeed_Mlak14.3gp?tsid=20070803-164051-9d637d11"sfgsfgsfgv




I use this pattern :
"http.*?\.(wmv|3gp).*""

but it returns only 'wmv' and '3gp' instead of "http://www.2shared.com/
download/1716611/e2000f22/Jadeed_Mlak14.wmv?
tsid=20070803-164051-9d637d11"

what can I do? what's wrong whit this pattern? thanx for your comments



From Shawn at Milochik.com  Mon Aug 20 10:58:39 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Mon, 20 Aug 2007 10:58:39 -0400
Subject: Newbee Question
In-Reply-To: <1187621470.484615.7010@i13g2000prf.googlegroups.com>
References: <mailman.15.1187620149.26576.python-list@python.org>
	<1187621470.484615.7010@i13g2000prf.googlegroups.com>
Message-ID: <2dc0c81b0708200758h498ae58cu5915b4865a2112c5@mail.gmail.com>

On 8/20/07, kyosohma at gmail.com <kyosohma at gmail.com> wrote:
> On Aug 20, 9:23 am, "HD1956" <hd7... at hotmail.com> wrote:
> > This is probably a simple code. I am a truck driver who gets paid by
> > stops and cases. I am trying to figure out how to code my stop pay. I
> > get 40 cents per stop up to 22 stops, and $1.40 per stops after that.
>
> def calc(num):
>         if num < 23:
>                 return 0.4 * num
>         else:
>                 overtime = num - 22
>                 x = 0.4 * 22
>                 x += overtime * 1.4
>                 return x
>
> # Use your own brain next time
>
> Mike
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>




Mike,

I wonder if we were both just duped into helping someone with their homework...

Shawn


From carsten at uniqsys.com  Fri Aug  3 13:08:31 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 03 Aug 2007 13:08:31 -0400
Subject: Using cursor.callproc with zxJDBC
In-Reply-To: <104F88F15D1E430B96FF79E35FE6B84D@VVA>
References: <104F88F15D1E430B96FF79E35FE6B84D@VVA>
Message-ID: <1186160911.3382.27.camel@dot.uniqsys.com>

On Fri, 2007-08-03 at 17:31 +0100, Vaughan V Ashe wrote:
> Hi 
>  
> We would like to use the store proc. We are using a postgreql
> database. what we have working so far is:
>  
> params = [4,4,2]
> 
> curs.callproc("update_job_status",params)
> 
> db.commit()
> 
> #print db
> 
> #print curs.description
> 
> result = curs.fetchall()
> 
> if result == 1:
> 
>     print "good one"
> 
> else:
> 
>     print "shite"
> 
>  
> 
> we are using the beta version of jython. Would be very happy to get a
> response from you

You haven't asked a question, and you're not describing what your
problem is.

I'm going to guess what your problem is: You're always getting the
result "shite" regardless of whether the procedure worked or not.
curs.fetchall() returns a list, which is never going to be equal to 1.

If this doesn't help you, please describe what exactly your problem is.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From kmcneillie at softwarespecialists.com  Thu Aug 30 12:06:40 2007
From: kmcneillie at softwarespecialists.com (Kelley McNeillie)
Date: Thu, 30 Aug 2007 12:06:40 -0400
Subject: Please assist- Python Consultant needed for 3-6 month project
Message-ID: <s6d6b2f3.092@server1.softwarespecialist.com>

I am contacting you from a company called Software Specialists, an IT Placement Firm based in Pittsburgh, PA.  We are prepared to make a donation to your organization if you could please help us out with a referral.  We are looking for a python developer with  web-based application experience.  If you know of anyone, or if you would be able to post this opportunity on your site, I would greatly appreciate it.  I am finding this skill pretty much impossible to identify locally, and I really would like to be able to assist my client with this position.   I am just trying to be creative in my search, I hope I am reaching the right person with this request.  If not, I apologize. Thank you in advance for any assistance you may be able to provide.

Best Regards,


Kelley McNeillie
Software Specialists, Inc.
357 Northgate Drive
Suite 10
Warrendale, PA 15086
724 933 6100 x 1105
724 933 6106 (F)
kmcneillie at softwarespecialists.com
www.softwarespecialists.com



From van.lindberg at gmail.com  Fri Aug  3 11:25:17 2007
From: van.lindberg at gmail.com (VanL)
Date: Fri, 03 Aug 2007 10:25:17 -0500
Subject: Trying to find zip codes/rest example
Message-ID: <f8vhct$3g6$1@sea.gmane.org>

Hello,

A couple months ago there was an example posted in a blog of a rest 
interface for validating zip codes.  If I recall correctly, the backend 
validator was written in python.

The validator demo page had a single text input; next to the text input 
would appear either a green check or a red X depending on whether the 
zip code was valid.

On the backend, the explanation of the demo included a discussion of 
using HTTP status codes (200 for a valid zip, 406? for invalid) so that 
the service could be used from a console as well.

I now cannot find this demo and the associated discussion.  Does anybody 
remember this demo and where I might be able to find it?

Thanks,

VanL



From zyzhu2000 at gmail.com  Wed Aug  1 11:37:23 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Wed, 01 Aug 2007 15:37:23 -0000
Subject: Assertion in list comprehension
Message-ID: <1185982643.001546.138180@e16g2000pri.googlegroups.com>

Hi,

Does anyone know how to put an assertion in list comprehension? I have
the following list comprehension, but I want to use an assertion to
check the contents of rec_stdl. I ended up using another loop which
essentially duplicates the functions of list comprehension. It just
look like a waste of coding and computer time to me.

I just wish I could put the assertions into list comprehensions.

        x=[(rec_stdl[0].st/10000.0,
            rec_stdl[0].cl,
            rec_stdl[0].bb,
            rec_stdl[0].bo,
            rec_stdl[1].bb,
            rec_stdl[1].bo,
            rec_stdl[0].ex
           )
           for rec_stdl in rec_by_ex if len(rec_stdl)==2
        ]

        #duplicated loop
        if __debug__:
            for rec_stdl in rec_by_ex:
                l=len(rec_stdl)
                assert(l<=2 and l>0)
                if l==2:
                    assert(rec_stdl[0].c=="C" and rec_stdl[1].c=="P")
                    assert(rec_stdl[0].ex==rec_stdl[1].ex)
                    assert(rec_stdl[0].st==rec_stdl[1].st)
                    assert(rec_stdl[0].cp==rec_stdl[1].cp)

Thanks,
Geoffrey



From sturlamolden at yahoo.no  Thu Aug  2 19:46:54 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: Thu, 02 Aug 2007 16:46:54 -0700
Subject: python 3.0, pywin32 and scipy
In-Reply-To: <1186088014.008755.318660@e9g2000prf.googlegroups.com>
References: <1186070475.659511.24130@q3g2000prf.googlegroups.com>
	<1186086609.231563.224090@x35g2000prf.googlegroups.com>
	<1186088014.008755.318660@e9g2000prf.googlegroups.com>
Message-ID: <1186098414.116069.149000@z24g2000prh.googlegroups.com>

On Aug 2, 10:53 pm, vml <victor.leb... at gmail.com> wrote:

> I hope it will be possible to switch easily to python 3. But I need to
> produce something as cheap as possible and I have no means ...


Python 3k is not released yet. Why do you worry about compatibility in
advance? Well, you are not the only one. I've heard this argument
before, that's why I bother to write this response.

Python 2.x will continue to work even after Python 3k is released.
There will also be future releases of Python 2.x.

Visual Basic .NET is not backwards compatible with VB6. But that does
not stop you form using VB6 even today. VB6 is soon 10 years old, it
was released in 1998. "Mainstream support" for VB6 ended on March 31,
2005. Extended support will end in March 2008. With Python 2.x this
even less troublesome as the source code is available  - it can be
recompiled when needed! You cannot recompile VB6, still it lasted 10
years. If you can use VB6 ten years, you can use Python 2.x at least
twice that long. That will give you twenty years to port your
application to a newer version of Python. But then you probably don't
care. I am sure the packages you mentioned will be ready for Python 3k
by then.

NumPy, SciPy, Matplotlib, etc. will be ported to Python 3k in due
time. The Pywin32 code is autogenerated with SWIG. When support for
Python 3k is added to SWIG (yes it will happen), there will be a
Pywin32 for Python 3k as well.

You don't have to fix something that works. Python 2.5.1 is what we
have today, use it as much as you can.









From bdesth.quelquechose at free.quelquepart.fr  Thu Aug  2 10:05:43 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 02 Aug 2007 16:05:43 +0200
Subject: Case study: library class inheritance with property declarations
In-Reply-To: <1186065365.546545.184840@i13g2000prf.googlegroups.com>
References: <1186062582.975223.230270@g12g2000prg.googlegroups.com>
	<1186063694.311416.133390@i13g2000prf.googlegroups.com>
	<1186065365.546545.184840@i13g2000prf.googlegroups.com>
Message-ID: <46b23c19$0$13518$426a74cc@news.free.fr>

cdleary at gmail.com a ?crit :
(snip)
> Last post -- I swear.
> 
> I failed to realize that it's all part of an extremely well defined
> attribute resolution protocol, and handled via the descriptor
> specification. Discussing descriptors was on the TODO list for the
> type/class unification document, but there's a very fulfilling
> explanation by Raymond Hettinger: http://users.rcn.com/python/download/Descriptor.htm
> Also, the official doc is here: http://docs.python.org/ref/descriptors.html
> 
> Maybe the documentation for the property builtin should make reference
> to the descriptor specification? If nobody thinks this is silly, I'll
> submit a documentation patch in a few days.

What to say ? As an old-time pyton user (well... 7+ years now) and 
meta-programming addict, it's nothing new to me, but the fact that you 
didn't realize it is certainly a clear indication that documentation is 
not really up to date, so yes, submitting a patch is certainly a pretty 
good idea.

> Sorry for the spam -- hope someone besides me learns from it!

What's to be learned is mostly that we (the whole community) should take 
more care of the doc (which I never contributed FWIW, so I'm the first 
one that should feel in guilt here).



From paul.faulstich at gmail.com  Sun Aug 26 16:03:01 2007
From: paul.faulstich at gmail.com (paul)
Date: Sun, 26 Aug 2007 13:03:01 -0700
Subject: pySerial in a daemon process
Message-ID: <1188158581.316824.89360@k79g2000hse.googlegroups.com>

I am writing a daemon process that reads data from the serial port /
dev/ttyS0.  I am using pyserial & the method for setting up a daemon
described in "Chris' Python Page" (http://homepage.hispeed.ch/py430/
python/) on an Ubuntu linux pc.

Everything works great EXCEPT...

in the daemon script, there are two lines to change the uid & gid that
the script runs as:
os.setegid(10)
os.seteuid(1000)

If I comment these out, so that the daemon runs as root, then
everything works fine.  I can also manually run the script that the
daemon process kicks off from my own id just fine.

If I put these back in and try to run the daemon, the script fails
when I try to connect to the serial port, with this error:
serial.serialutil.SerialException: Could not open port: [Errno 13]
Permission denied: '/dev/ttyS0'

In my debugging I have tried setting the uid to my own uid, and the
gid to a variety of different groups that I belong to.  None of them
work.

I could certainly run the daemon as root, but I would rather not.
What really confuses me is that if I manually run the script as myself
(without using the daemon script), it connects fine, but when root
uses os.seteuid() to my uid, it fails.

What do I need to do to get this to work?

Many thanks,

Paul



From max at alcyone.com  Thu Aug  9 23:57:49 2007
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 09 Aug 2007 20:57:49 -0700
Subject: Puzzled by "is"
In-Reply-To: <87zm1042f0.fsf@benfinney.id.au>
References: <20070809194105.39BD11E400A@bag.python.org>
	<f9frbl$dps$1@sea.gmane.org>
	<mailman.1814.1186692638.22759.python-list@python.org>
	<87zm1042f0.fsf@benfinney.id.au>
Message-ID: <3IOdndVSErSgfybbnZ2dnUVZ_sPinZ2d@speakeasy.net>

Ben Finney wrote:

> It's important to also realise that the language is *deliberately*
> non-committal on whether any given value will have this behaviour;
> that is, it's entirely left to the language implementation which
> optimisation trade-offs to make, and the language user (that's you and
> I) should *not* expect any particular behaviour to hold between
> different implementations.

Right.  In the terminology of language standards, it is implementation 
defined.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Only love is worth the risk
    -- Oleta Adams


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Aug  6 03:44:59 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 06 Aug 2007 09:44:59 +0200
Subject: (no) fast boolean evaluation ?
In-Reply-To: <mailman.1575.1186158943.22759.python-list@python.org>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>	<cfb58d850708021619s298f69b9p3af86905d1695939@mail.gmail.com>	<mailman.1551.1186099243.22759.python-list@python.org>	<46b2e56b$0$18879$426a74cc@news.free.fr>	<pan.2007.08.03.14.24.23.227662@REMOVE.THIS.cybersource.com.au>	<46b35069$0$17822$426a74cc@news.free.fr>
	<mailman.1575.1186158943.22759.python-list@python.org>
Message-ID: <46b6d16a$0$29273$426a74cc@news.free.fr>

Ed Leafe a ?crit :
> On Aug 3, 2007, at 11:57 AM, Bruno Desthuilliers wrote:
> 
>> Sorry, I forgot to mention the language did not allow to have else & if
>> in the same statement. IOW :
>>
>> if some_condition then
>>    do_sometehing
>> else
>>    if some_other_condition then
>>      do_something_else
>>    else
>>      if yet_another_condition then
>>        do_yet_another_thing
>>      else
>>        if your_still_here then
>>           give_up('this language is definitively brain dead')
>>        end if
>>      end if
>>    end if
>> end if
> 
>     Usually that's because the language provides a switch/case statement 
> construct.

Err... You may have forgotten from lack of practice, but there are 
complex conditions that may not always be expressed using a switch/case...

> If it does and you try to write the above code, it isn't the 
> language that's brain-dead!  ;-)

Lats time I checked, my brain was still alive.


From garyjefferson123 at gmail.com  Sat Aug 18 00:53:34 2007
From: garyjefferson123 at gmail.com (garyjefferson123 at gmail.com)
Date: Sat, 18 Aug 2007 04:53:34 -0000
Subject: customizing a logging logger
Message-ID: <1187412814.493872.325190@j4g2000prf.googlegroups.com>

Suppose I have some sort of context variable that I want to appear in
log messages.  E.g.:

logger = logging.getLogger("somelogger")
class SomeOp:
    def __init__(self, ctx):
        self.ctx = ctx
    def method1(self):
        logger.info("%s: here's a message", self.ctx)

What's the idiomatic way to abstract away the inclusion of self.ctx
from the calls in logger.info() et al?  Is there some way I can
declare a

    @property
    def info(self): return logger.info

but have it insert the '"%s: " % self.ctx' bit for me in one place
instead of the dozens of places I currently do it in the class?

Thanks,
Gary



From ldo at geek-central.gen.new_zealand  Fri Aug 31 01:22:33 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 31 Aug 2007 17:22:33 +1200
Subject: Error handling in file generation (Pythonic way: with /
	decorators?)
References: <1188377932.955314.104570@r29g2000hsg.googlegroups.com>
	<1188378461.388224.164030@50g2000hsm.googlegroups.com>
Message-ID: <fb88e4$ev8$2@lust.ihug.co.nz>

In message <1188378461.388224.164030 at 50g2000hsm.googlegroups.com>, xavim
wrote:

> This should read::
> 
>     try:
>         (...)
>     except:
>         os.remove(dictpath)
>         raise

Perhaps:

    try :
        (...)
    except :
        try :
            os.remove(dictpath)
        except :
            pass
        #end try
        raise
    #end try

(Just in case.)


From bj_666 at gmx.net  Sat Aug 11 12:48:38 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 11 Aug 2007 16:48:38 GMT
Subject: How to change a PyObject passed to the C extension
References: <1186850599.738739.195410@b79g2000hse.googlegroups.com>
Message-ID: <5i67j5F3ml00gU3@mid.uni-berlin.de>

On Sat, 11 Aug 2007 09:43:19 -0700, MD wrote:

>    I have a Python C extension which is passed a PyObject containing
> an integer value. Is it possible to change this same PyObject so that
> now the integer is of a different value?

No it is not.  Even if you poke around in the object ``struct`` this would
have severe consequences for cached/shared objects.  Just imagine:

from your_module import bzzzt

def f():
    print 2 + 2

bzzzt(2)   # This changes the value of 2 to 3.
f()        # This prints '6'!

Ciao,
	Marc 'BlackJack' Rintsch


From lisajones22 at gmail.com  Tue Aug 14 02:32:40 2007
From: lisajones22 at gmail.com (Lisa Jones)
Date: Mon, 13 Aug 2007 23:32:40 -0700
Subject: =?utf-8?B?4pa6RU5KT1kgZnJlZSBzYXRlbGxpdGUgdHYgb24geW91ciBwY+KXhA==?=
Message-ID: <1187073160.240558.181780@x40g2000prg.googlegroups.com>

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From comedian.watchman at gmail.com  Tue Aug  7 16:57:16 2007
From: comedian.watchman at gmail.com (Edward Blake)
Date: Tue, 7 Aug 2007 16:57:16 -0400
Subject: Python FNV Hash
Message-ID: <eae776d40708071357j416f666fj909b0e1a6c5f3af6@mail.gmail.com>

Before I go through the work of wrapping the FNV hash source found on
http://isthe.com/chongo/tech/comp/fnv/ I thought I would ask here to see if
anyone already has an implementation of it available. I'm particularly
interested in hash_64, the 64 bit Fowler/Noll/Vo-0 FNV-1a hash code.
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From sjoerd at intercue.nl  Wed Aug  8 16:11:52 2007
From: sjoerd at intercue.nl (Sjoerd Op 't Land)
Date: Wed, 08 Aug 2007 22:11:52 +0200
Subject: Stop a thread on deletion
In-Reply-To: <mailman.1746.1186585827.22759.python-list@python.org>
References: <f9ckqg$ghi$1@netlx020.civ.utwente.nl>
	<mailman.1746.1186585827.22759.python-list@python.org>
Message-ID: <f9d82b$29t$1@netlx020.civ.utwente.nl>

Dear Cris,

Thanks a lot. This works! (What you didn't know, there was already such 
a 'proxy' object in the design, so it isn't the hack it looks ;).)

Thanks again,
Sjoerd Op 't Land

Chris Mellon schreef:
> On 8/8/07, Sjoerd Op 't Land <sjoerd at intercue.nl> wrote:
>> Hello all,
>>
>> I'm using threading for generating video content. The trouble is how to
>> kill the thread, because there are multiple (simultaneous) owners of a
>> thread. Ideally, a flag would be set when the reference count of the
>> thread becomes zero, causing the run() loop to quit. Example:
>>
>> import threading
>> import time
>> import gc
>>
>> class myThread(threading.Thread):
>>    def __init__(self):
>>      self.passedOut = threading.Event()
>>      threading.Thread.__init__(self)
>>    def __del__(self):
>>      self.passedOut.set()
>>    def run(self):
>>      i = 0
>>      while not self.passedOut.isSet():
>>        i += 1
>>        print "Hi %d" % i
>>        time.sleep(0.25)
>>
>>
>> a = myThread()
>> a.start()
>> time.sleep(2.5)
>> a = None
>> time.sleep(2.5)
>>
>> Unfortunately, this doesn't work. When I remove the while-loop, __del__
>> is called, actually. Appearantly there is still some reference to the
>> thread while it is running.
>>
>> I tried gc.get_referrers(self), but it seems to need some parsing. I'm
>> not sure how to implement that and I'm not sure whether it will work
>> always or not.
>>
> 
> gc.get_referrers returns a list of object instances that hold a
> reference to the object. The important one in this case is, of course,
> the thread itself. The thread holds a reference to the run method
> which (of course) requires a reference to the object. In other words,
> a running thread cannot be refcounted to zero. You are going to need a
> better method of handling your resources.
> 
> Perhaps instead of holding a reference to the thread, they could hold
> a reference to a proxy object:
> 
> import threading
> import time
> import gc
> import pprint
> 
> class myThread(threading.Thread):
>     def __init__(self):
>         self.passedOut = threading.Event()
>         threading.Thread.__init__(self)
>     def run(self):
>         i = 0
>         while not self.passedOut.isSet():
>           i += 1
>           print "Hi %d" % i
>           time.sleep(1)
>         print "stopped"
> 
> 
> class ThreadProxy(object):
>     def __init__(self, proxy_for):
>         self.proxy_for = proxy_for
>     def __del__(self):
>         self.proxy_for.passedOut.set()
>     def start(self):
>         self.proxy_for.start()


From hniksic at xemacs.org  Sun Aug 12 14:50:33 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Sun, 12 Aug 2007 20:50:33 +0200
Subject: Fatest standard way to sum bytes (and their squares)?
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
Message-ID: <87r6m8egee.fsf@mulj.homelinux.net>

Erik Max Francis <max at alcyone.com> writes:

> So far the fastest way I've found is using the `sum` builtin and
> generators::
>
> 	ordinalSum = sum(ord(x) for x in data)
> 	ordinalSumSquared = sum(ord(x)**2 for x in data)

For ordinalSum, using imap is almost twice as fast:

$ python -m timeit -s 'data=[chr(x) for x in xrange(256)]' 'sum(ord(x) for x in data)'
10000 loops, best of 3: 92.4 usec per loop
$ python -m timeit -s 'data=[chr(x) for x in xrange(256)]; from itertools import imap' 'sum(imap(ord, data))'
10000 loops, best of 3: 55.4 usec per loop

Of course, that optimization doesn't work for the squared sum; using a
lambda only pessimizes it.


From zentraders at gmail.com  Tue Aug 14 18:46:23 2007
From: zentraders at gmail.com (Zentrader)
Date: Tue, 14 Aug 2007 15:46:23 -0700
Subject: What order does info get returned in by os.listdir()
In-Reply-To: <gemini.jms7ay00fafcf00k8@jernic.by.invalid>
References: <gemini.jms7ay00fafcf00k8@jernic.by.invalid>
Message-ID: <1187131583.114731.279180@g12g2000prg.googlegroups.com>

On Aug 14, 1:52 pm, Jeremy C B Nicoll <jer... at blueyonder.co.uk> wrote:
> What order does info get returned in by os.listdir() ?
>
> I'm just starting to write python code, on an Win XP Pro machine.  I've got
> various directories which, when I look at them in Win XP, sorted by name, I
> see in order, eg:
>
>    ~prefixed file   .txt
>    A.txt
>    B.txt
>    ...
>    Z.txt
>
> ie, XP seems to think that files with a "~" as their first character are
> sorted ahead of A.
>
> When I use os.listdir() to return that list of leaf values, I do seem to get
> them in alphabetical order, A before B before C etc, but the ~-prefixed ones
> are returned after the Z-prefixed files rather than before the A-ones.
>
> I was wondering why...
>
> --
> Jeremy C B Nicoll - my opinions are my own.

I think that os.listdir() returns file names in chronological order,
that is in the order they were created on disk.  If there is any
sorting done it will be in ASCII order.  All data is stored as a
number so it is sorted that way.  ord("~")= 126, and ord("Z")=90 so it
makes sense that "~" is after "Z".



From steve at holdenweb.com  Wed Aug  8 11:59:54 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Aug 2007 11:59:54 -0400
Subject: This bit of code hangs Python Indefinitely
In-Reply-To: <f9ci85$1t3$2@solaris.cc.vt.edu>
References: <f9ch45$ku$1@solaris.cc.vt.edu> <5htvm3F3md0abU3@mid.uni-berlin.de>
	<f9ci85$1t3$2@solaris.cc.vt.edu>
Message-ID: <f9cp9o$sq3$1@sea.gmane.org>

brad wrote:
> Marc 'BlackJack' Rintsch wrote:
> 
>> Why did you put an upper bound to the queue?
> 
> For clarity. Explicit is better than implicit, right? In our design, the 
> queue should only have x number of things, so why not show that? Other 
> than that, the limit is arbitrary and is not needed.

Yes, but you are asking a bit more of Queue.Queue than its design is 
intended to provide. Normally a limit on the input side is used to allow 
the scheduling of a consumer thread that will remove items, thus 
allowing the producer to restart.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From jocago at gmail.com  Wed Aug  8 14:11:19 2007
From: jocago at gmail.com (jocago)
Date: Wed, 08 Aug 2007 11:11:19 -0700
Subject: Launch file from Python
In-Reply-To: <1186594611.490723.251870@m37g2000prh.googlegroups.com>
References: <1186594137.971393.128780@57g2000hsv.googlegroups.com>
	<1186594611.490723.251870@m37g2000prh.googlegroups.com>
Message-ID: <1186596679.600526.172640@r34g2000hsd.googlegroups.com>

On Aug 8, 1:36 pm, kyoso... at gmail.com wrote:
> On Aug 8, 12:28 pm, joc... at gmail.com wrote:
>
> > Good afternoon from someone who is trying to learn Python.
>
> > I would like to launch an app from within a Python script. From the
> > examples I have found, I should be able to do this with os.system.
>
> > I use this:
> > os.system("xplanet-1.2.0/xplanet.exe -fontsize 24 -label -target earth
> > -lat 33.65 -lon -84.42 -radius 40 -num_times 1 -tmpdir .")
> > This is copied directly from the .bat file that launches the xplanet
> > app. It works there.
>
> > and get this:
> > 1
>
> > Can someone fill me in?  Thanks.
>
> That's just the exit status or run status, if I recall correctly. I
> think 0 (i.e. False) means it didn't run properly and anything else is
> True, or ok. Something like that. Technically speaking, you should
> probably switch to using the subprocess module as it is replacing that
> os module's functionality:http://www.python.org/doc/2.4/lib/module-subprocess.html
>
> This thread also discusses it somewhat:http://www.velocityreviews.com/forums/t348777-python-doc-problem-exam...
>
> Mike

The application, however, never runs. I'll give the sub-process a
shot. Thanks.



From greg at cosc.canterbury.ac.nz  Tue Aug  7 22:33:01 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Wed, 08 Aug 2007 14:33:01 +1200
Subject: Something in the function tutorial confused me.
In-Reply-To: <mailman.1726.1186537161.22759.python-list@python.org>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>	<46B8626A.2070303@bigfoot.com>
	<mailman.1726.1186537161.22759.python-list@python.org>
Message-ID: <5hsoi3F3mlni2U1@mid.individual.net>

Steve Holden wrote:
> OK. The difference is that [] is a mutable value, while None is 
> immutable.

No, it's not. It has nothing to do with mutability
vs immutability.

The difference is that in the first version the
expression [] is evaluated only *once*, when the
function is defined. Therefore there is just one
list object getting re-used.

In the second version, the expression [] gets
evaluated *each* time the function is called,
creating a new list object each time.

> When the function starts out with None as y's value any assignment to y 
> causes it to reference a different value  (since None is immutable).

You're confused. Assigning to y simply causes it
to reference whatever object is being assigned.
This is always true, regardless of what y was
referencing before.

To see that the immutability of None has nothing
to do with it, try the following version:

def f(x, y = []):
   y = []
   y.append(x)
   print y

f(17)
f(42)

Try to work out what it will do, then try it, and
see if you understand why it does what it does.

--
Greg


From aleax at mac.com  Wed Aug 15 11:55:11 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 15 Aug 2007 08:55:11 -0700
Subject: closing StringIO objects
References: <slrnfc67ml.27o.horpner@FIAD06.norwich.edu>
Message-ID: <1i2vpnc.wv6c3n1r76qzvN%aleax@mac.com>

Neil Cerutti <horpner at yahoo.com> wrote:

> The documentation says the following about StringIO.close:
> 
>   close( ) 
>   Free the memory buffer. 
> 
> Or else... what? 

Or else the memory buffer sticks around, so you can keep calling
getvalue as needed.  I believe the freeing will happen anyway,
eventually, if and when the StringIO instance is garbage collected (just
like, say, a file object's underlying fd gets closed when the file
object is garbage collected), but relying on such behavior is often
considered a dubious practice nowadays (given the existence of many
Python implementations whose GC strategies differ).


Alex


From musiccomposition at gmail.com  Sun Aug 19 22:18:07 2007
From: musiccomposition at gmail.com (Benjamin)
Date: Mon, 20 Aug 2007 02:18:07 -0000
Subject: Python question (PyNoob)
In-Reply-To: <3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d@bt.com>
References: <3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d@bt.com>
Message-ID: <1187576287.194843.266600@q3g2000prf.googlegroups.com>

On Aug 19, 7:33 pm, Anonymous <no.re... at here.com> wrote:
> I have exp with C/C++ (and a few other langs). I want to use Python to
> start doing the ff:
>
> 1). Data Munging (text processing) - instead of Perl
> 2). Automating my build process
> 3). (Possibly) some web data retrieval jobs
>
> Can anyone point me to resurces/possibly scripts that can get me up to
> speed (to do these 3 things) ASAP, without having to learn the basics of
> programming?

I think if you've chosen Python as a language to use for these things,
you could invest some time in learning the language. It is after all
very easy to learn and you just have to do it once and many of your
programming task will be taken care of.



From Jameson.Quinn at gmail.com  Tue Aug 28 19:51:16 2007
From: Jameson.Quinn at gmail.com (Jameson.Quinn at gmail.com)
Date: Tue, 28 Aug 2007 16:51:16 -0700
Subject: "Try:" which only encompasses head of compound statement
In-Reply-To: <87fy24fdgf.fsf@benfinney.id.au>
References: <1188250535.607963.42540@22g2000hsm.googlegroups.com>
	<87wsvgfszm.fsf@benfinney.id.au>
	<13d7898odj2g19b@corp.supernews.com>
	<87fy24fdgf.fsf@benfinney.id.au>
Message-ID: <1188345076.396437.111160@w3g2000hsg.googlegroups.com>

Those are some good responses, but I think they focused a little too
much on the specifics of my example - especially the 'print'
statement. In real life, I want to set some return values to sensible
defaults if the file doesn't exist, but I want the errors from inside
the block to trickle up as normal. And yes, I can easily use a
temporary variable for the open file, but it really seems to me that
this defeats the purpose of the 'with' statement - if this were
something more dangerous than a file, I'd feel mighty leery of having
it in a temporary variable outside a 'with' for even a moment.

So, the options are:
-temporary variable - could this EVER be more dangerous than the with
statement (KeyboardInterrupt which is later caught and handled?)
-'tunnel' internal exceptions past the try by wrapping them in a
TunnelException and then unwrapping them with a containing try block.

The second looks like a hack to me, and the first still feels
dangerous. So I still think that some syntax here would be a bit more
than just sugar.



From robert.rawlins at thinkbluemedia.co.uk  Fri Aug  3 09:56:43 2007
From: robert.rawlins at thinkbluemedia.co.uk (Robert Rawlins - Think Blue)
Date: Fri, 3 Aug 2007 14:56:43 +0100
Subject: Replacing _xmlplus.dom.minidom with xml.dom.minidom
In-Reply-To: <1186148352.647143.68890@l70g2000hse.googlegroups.com>
References: <1186148352.647143.68890@l70g2000hse.googlegroups.com>
Message-ID: <00e701c7d5d6$20069b50$6013d1f0$@rawlins@thinkbluemedia.co.uk>

Just as a heads up, minidom is pretty inefficient and difficult to work with
too.

On someone else's advice I switched over to ElementTree and have been really
pleased with the results, its much simpler to work with and more efficient
too.

Rob

-----Original Message-----
From: python-list-bounces+robert.rawlins=thinkbluemedia.co.uk at python.org
[mailto:python-list-bounces+robert.rawlins=thinkbluemedia.co.uk at python.org]
On Behalf Of aine_canby at yahoo.com
Sent: 03 August 2007 14:39
To: python-list at python.org
Subject: Replacing _xmlplus.dom.minidom with xml.dom.minidom

Hi,

I'm working with a number of scripts which were written years ago for
my company for Python 2.2, and I'd like to update for Python 2.5. I
have written a script to add # -*- coding: cp1252 -*- to the beginning
of all my scripts, and that has fixed the encoding issues.

Another issue was the use of -

from _xmlplus.dom import minidom

http://sourceforge.net/project/showfiles.php?group_id=6473

I couldn't get a version of this module for  2.5, so I changed the
above to -

from xml.dom import minidom

The scripts I work with are all working now correctly for 2.5. But I
haven't been able to test the whole system as not all of it concerns
me. Anyway, my colleges are interested in updating also if it will be
reasonably hassle free.

So my main concern now is the use of  _xmlplus.dom.minidom. Why was it
used and what differences should  I look out for with regard to
xml.dom.mididom

Thanks very much for your help,

Barry.

-- 
http://mail.python.org/mailman/listinfo/python-list



From orsenthil at users.sourceforge.net  Sun Aug 19 23:40:41 2007
From: orsenthil at users.sourceforge.net (O.R.Senthil Kumaran)
Date: Mon, 20 Aug 2007 09:10:41 +0530
Subject: passing arguments with ampersands
In-Reply-To: <f6be0af40708180524n8d11a68xfcbee5c7f268bdea@mail.gmail.com>
References: <f6be0af40708180354u719f5c71p2be27e0ee8317f9b@mail.gmail.com>
	<20070818112913.GA3632@gmail.com>
	<f6be0af40708180524n8d11a68xfcbee5c7f268bdea@mail.gmail.com>
Message-ID: <20070820034041.GA4616@gmail.com>

Sorry for ignoring the thread.
> the problem is that when i associate a file extension to my application and
> i open it, the filename is not quoted before passed as an arguement. i dont

If it is not quoted by default, you can quote it explicit. If this be the case where the filename is obtained from the OS. 

newname = '"' + filename + '"'

If you are passing the filename, then just pass it as "filename".

> args = None
> > if len(sys.argv) > 1:
> >     args = sys.argv[1:]
> >
> print args

Yes, '&' character is being interpreted by the SHELL command interpreter and python is not receiving it. Thats why it is failing. You need to escape the special character or quote the entire arg.

> how can i make the params get quoted before send as arguments?

How are you getting the params? 
1) Like I said, if you are passing it, escape the special characters or quote the entire thing.
2) If you getting it from a python function like os.listdir(), I assume it should be readily usable.

[ors at goofy ~]$ cat 1.py
import sys
arg = None
if len(sys.argv) > 1:
    args = sys.argv[1:]

print args
[ors at goofy ~]$ python 1.py something anotherthing \& yetanother
['something', 'anotherthing', '&', 'yetanother']
[ors at goofy ~]$ python 1.py "something anotherthing & yetanother"
['something anotherthing & yetanother']
[ors at goofy ~]$





If filenames are obtained as os.listdir(), then quote each other
> 
> 
> 
> >
> > 2007/8/18, O.R.Senthil Kumaran <orsenthil at users.sourceforge.net>:
> 
> > Quote:D:\ftp\Music\Mixes & Compilations\Above & Beyond - Essential
> > > Mix\001_Essential_Mix_2004-06-06_-_Above_and_Beyond.txt
> >
> > > when i put 'print sys.argv[1:]' at the very beginning of the script, all
> > i
> > > get is this:
> > >
> > > Quote:['D:\\ftp\\Music\\Mixes']
> > >
> > Can you share the portion of the code?
> > Are you quoting the argument that you are passing?
> > for e.g:
> >
> > #cat 1.py
> > import sys
> > print sys.argv[1]
> >
> > #python 1.py "I am able to print the spaces and & characters"
> > I am able to print the spaces and & characters
> >
> > --
> > O.R.Senthil Kumaran
> > http://uthcode.sarovar.org
> >

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From arkanes at gmail.com  Thu Aug 30 19:48:28 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 30 Aug 2007 18:48:28 -0500
Subject: list index()
In-Reply-To: <1188517370.998114.119940@q4g2000prc.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<87bqcod2gq.fsf@benfinney.id.au>
	<1188517370.998114.119940@q4g2000prc.googlegroups.com>
Message-ID: <4866bea60708301648w898c6fdia1fc08107edc1568@mail.gmail.com>

On 8/30/07, zzbbaadd at aol.com <zzbbaadd at aol.com> wrote:
> On Aug 30, 4:31 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
> > zzbba... at aol.com writes:
> > > In my case of have done os.listdir() on two directories. I want to see
> > > what files are in directory A that are not in directory B.
> >
> > You get that information unambiguously. It's an exceptional case,
> > since there's no index to return, so it throws an exception.
> >
> > > I have used exceptions in other languages and only do so on logic
> > > that should never happen.
> >
> > You're confusing "assert" ("this should always be true") with
> > "exception" ("this is an exception to the the normal flow of this
> > process").
> >
> > An exception isn't "something that should never happen", it's
> > something that is entirely possible and needs to be handled somehow.
>
> I don't think that is the definition used across computer science.
>

how its defined in Python is what is important in this context.

> It suddenly dawned on me that what would be best would be a contains()
> (or IN syntax for those who can't afford to wait) for lists.
>
> if mylist.contains("hello):
>

Genius. Why didn't anyone think of that before?


From uymqlp502 at sneakemail.com  Thu Aug 30 19:54:14 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Thu, 30 Aug 2007 16:54:14 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <46d75191$0$401$426a74cc@news.free.fr>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
Message-ID: <1188518054.298017.90610@x35g2000prf.googlegroups.com>


Bruno Desthuilliers wrote:
> Russ a ?crit :
> > On Aug 28, 10:58 pm, Michele Simionato <michele.simion... at gmail.com>
> > wrote:
> >
> >
> >>Why do you think that would ad a strong positive capability?
> >>To me at least it seems a big fat lot of over-engineering, not
> >>needed in 99% of programs. In the remaining 1%, it would still not
> >>be needed since Python provides out of the box very powerful
> >>metaprogramming capabilities so that you can implement
> >>yourself the checks you need, if you really need them.
> >
> >
> > I get the strong impression you don't really understand what
> > programming by contract is.
>
> I get the strong impression you don't really understand how
> condescending you are.

When someone writes something as ignorant as that, they need to be
called on it.

So you can implement everything you need already in Python? Yes, of
course, and you
can do it in machine language too -- if you have the time to waste.

> > I have not yet personally used it,
>
> You have no working experience with the concept, but you think it should
> make it into Python's core ???

I don't need to use it to understand the concept. That has been
explained
brilliantly by the Eiffel and SPARK Ada folks.

I am also smart enough to figure out that
it can greatly enhance unit testing, and it can also be used as an
integral part of unit testing.
Once you have the conditions in place, all you need to do in your unit
tests is to send inputs
to the unit and wait to see if exceptions are thrown.

In fact, I would even propose a new name for "programming by
contract." I would call it
"self-testing code" because the code essentially tests itself every
time it is run with the
checks activated.



From sjmachin at lexicon.net  Thu Aug  2 20:01:34 2007
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 02 Aug 2007 17:01:34 -0700
Subject: frequency analysis of a DB column
In-Reply-To: <1186021313.413443.184060@i38g2000prf.googlegroups.com>
References: <1186021313.413443.184060@i38g2000prf.googlegroups.com>
Message-ID: <1186099294.343121.50240@d30g2000prg.googlegroups.com>

On Aug 2, 12:21 pm, goldtech <goldt... at worldpost.com> wrote:
> In Python 2.1 are there any tools to take a column from a DB and do a
> frequency analysis - a breakdown of the values for this column?
>
> Possibly a histogram or a table saying out of 500 records I have one
> hundred and two "301" ninety-eight "212" values and three-hundred
> "410"?
>
> Is SQL the way to for this?

Umm yes, screamingly obviously, I would have thought, given that you
have to use SQL anyway to get the data out of the database ....
something like this, with easy embellishment with where, having and
order by clauses:

select col_name, count(*)
from table_name
where yadda yadda etc if necessary/desired
group by col_name
having count(*) >= some_threshold
order by count(*) desc

Apart from ease of writing, this puts the load on the server, not the
client, and saves network traffic -- why transmit thousands/millions
of data items around the building or across town when you don't have
to? All you have to do in Python is add up the frequencies -- better
than doing a "select count(*) from table_name".

If you want to do something smart in Python, package the above SQL up
so that table_name and col_name are parameters ... you could then have
a handy little command-line gadget ready for those moments when you
need to find out things like how many different mis-spellings of
"developer" there are in the HR database :-)

>
> Of course there'd be 1000's of values....
>
> I'm not asking about connecting to the DB, just tools to collate and
> tally this sort of thing.
>
> Thanks,
> Lee G.




From brown at esteem.com  Fri Aug 31 13:14:29 2007
From: brown at esteem.com (Tom Brown)
Date: Fri, 31 Aug 2007 10:14:29 -0700
Subject: low level ethernet device access in linux
Message-ID: <200708311014.31047.brown@esteem.com>

Hi,

I have a windows application, written in delphi, that communicates to our 
devices using raw ethernet frames. I am trying to port this application to 
linux using python. However, when I try to open a socket, I get this error:

  File "/home/tbrown/projects/discovery/trunk/comm.py", line 9, in __init__
    self.s = socket(AF_PACKET, SOCK_RAW, proto)
  File "/usr/local/lib/python2.5/socket.py", line 156, in __init__
    _sock = _realsocket(family, type, proto)
socket.error: (1, 'Operation not permitted')

I understand that I am getting this error because I am running the application 
as a user and not as root. I would like to be able to run this app. as a 
user. Is there a way to create a socket without running the app. as root or 
sudo? When I run the app. as root I get this error:

discovery.py: cannot connect to X server

Thanks,
Tom


From jstroud at mbi.ucla.edu  Fri Aug 24 01:55:52 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 23 Aug 2007 22:55:52 -0700
Subject: unifying many packages under one name
In-Reply-To: <mailman.231.1187929096.32294.python-list@python.org>
References: <mailman.231.1187929096.32294.python-list@python.org>
Message-ID: <gkuzi.4656$LL7.3867@nlpi069.nbdc.sbc.com>

Eric S. Johansson wrote:
> I have a collection of packages and I want to put them under single 
> unifying name.  my goal is to reduce namespace pollution and make all 
> these packages accessible as 'import vvv.aaa'. In more detail, if I have 
> packages 'aaa' and 'bbb', what do I do to put those packages under 
> unifying name such as 'vvv'? the only way I can see to do it is to 
> create 'vvv' as a directory with its own __init__.py but I'm not sure 
> that were work right either.
> 
> 
> thanks.
> 

I don't see why it would be a problem:


py> import os
py> for afile in os.listdir('pypack'):
...   if not afile.endswith('pyc'):
...     print '# %s' % afile
...     print open(os.path.join('pypack', afile)).read().strip()
...     print '# end of file\n\n'
...
# __init__.py
from mod1 import x
from mod2 import y
# end of file


# mod1.py
x = 14
# end of file


# mod2.py
y = 42
# end of file


py> import pypack
py> dir(pypack)

['__builtins__',
  '__doc__',
  '__file__',
  '__name__',
  '__path__',
  'mod1',
  'mod2',
  'x',
  'y']
py> pypack.mod1
<module 'pypack.mod1' from 'pypack/mod1.py'>


James


From lac at openend.se  Sat Aug  4 20:40:52 2007
From: lac at openend.se (Laura Creighton)
Date: Sun, 05 Aug 2007 02:40:52 +0200
Subject: [pygame] pyweek is happening august 02 - august 09 
In-Reply-To: Message from Luke Paireepinart <rabidpoobear@gmail.com> 
	of "Sat, 04 Aug 2007 14:25:29 CDT." <46B4D2A9.1010405@gmail.com> 
References: <200708041832.l74IWkRY027388@theraft.openend.se>
	<46B4D2A9.1010405@gmail.com> 
Message-ID: <200708050040.l750eqFQ025279@theraft.openend.se>

In a message of Sat, 04 Aug 2007 14:25:29 CDT, Luke Paireepinart writes:
>Laura Creighton wrote:
>> 00:00 UTC 2007-09-02 to 00:00 UTC 2007-09-09 exactly.  See
>> www.pyweek.org
>>
>> PyconUK is happening.  http://www.pyconuk.org/ 8th and 9th September.
>>
>> This means that those of us who generally do not see each other but are
>> going to PyconUK could put together an entry and then sprint together
>> on it before PyCon UK.  There would be this terrible torment -- do
>> I attend the con or get my game to work -- but it is still the
>> best chance some of us have to work together yet.
>>
>> Talk to me if you are interested in maybe making a PyconUK pygame
>> team.  I think that this could be a lot of fun.  Sign up on
>> www.pyweek.org if you think so, as well.  But mail me.
>>
>> John -- assuming we want to meet up _before_ PyConUK -- can that
>> work?  Can you point us at a cheap hostel for a few days?
>>
>> Laura Creighton
>>   
>Laura - Pyweek is happening the first week in September, not august.
>Thanks for giving me a good scare, thinking i missed the first half alrea
>dy!

You are welcome to the scare, but pyconUK is happening first week
of Sept too!  So my plan of a 'would not meet but for pyconUK
team' is still very alive.

Laura


From toto at titi.de  Sat Aug 25 04:10:44 2007
From: toto at titi.de (asrenzo)
Date: Sat, 25 Aug 2007 10:10:44 +0200
Subject: Running daemon with zdaemon ... example help?
In-Reply-To: <1188011052.347321.211890@r23g2000prd.googlegroups.com>
References: <1188011052.347321.211890@r23g2000prd.googlegroups.com>
Message-ID: <46cfe403$0$21147$7a628cd7@news.club-internet.fr>

Hi,

This could also be a good starting point:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731

Regards,

Laurent

Genie T a ?crit :
> Hi all,
> 
> I'm looking at zdaemon to run my python scripts as a daemon but it
> seems to have few example that guide me how to follow. It would be
> great if you can give me a simple example of how to use. I'm newbie
> here :)
> 
> Thanks
> 


From db3l.net at gmail.com  Thu Aug 30 15:25:25 2007
From: db3l.net at gmail.com (David Bolen)
Date: Thu, 30 Aug 2007 15:25:25 -0400
Subject: Unzip: Memory Error
References: <1188413939.834662.193180@y42g2000hsy.googlegroups.com>
	<m21wdmgkmh.fsf@valheru.db3l.homeip.net>
	<1188472431.290871.103720@o80g2000hse.googlegroups.com>
Message-ID: <m2642wg6ze.fsf@valheru.db3l.homeip.net>

mcl <mcl.office at googlemail.com> writes:

> pseudo code
>
> zfhdl = zopen(zip,filename)          # Open File in Zip Archive for
> Reading
>
> while True:
>     ln = zfhdl.readline()            # Get nextline of file
>     if not ln:                       # if EOF file
>       break
>     dealwithline(ln)                 # do whatever is necessary with
> file
> zfhdl.close
>
> That is probably over simplified, and probably wrong but you may get
> the idea of what I am trying to achieve.

Do you have to process the file as a textual line-by-line file?  Your
original post showed code that just dumped the file to the filesystem.
If you could back up one step further and describe the final operation
you need to perform it might be helpful.

If you are going to read the file data incrementally from the zip file
(which is what my other post provided) you'll prevent the huge memory
allocations and risk of running out of resource, but would have to
implement your own line ending support if you then needed to process
that data in a line-by-line mode.  Not terribly hard, but more
complicated than my prior sample which just returned raw data chunks.

Depending on your application need, it may still be simpler to just
perform an extraction of the file to temporary filesystem space (using
my prior code for example) and then open it normally.

-- David


From kyosohma at gmail.com  Tue Aug 21 12:10:14 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 21 Aug 2007 09:10:14 -0700
Subject: The folder a script is executed in
In-Reply-To: <1187709831.722991.99490@l22g2000prc.googlegroups.com>
References: <1187687436.476773.276550@22g2000hsm.googlegroups.com>
	<1187709831.722991.99490@l22g2000prc.googlegroups.com>
Message-ID: <1187712614.901337.220830@x35g2000prf.googlegroups.com>

On Aug 21, 10:23 am, Benjamin <musiccomposit... at gmail.com> wrote:
> On Aug 21, 4:10 am, aine_ca... at yahoo.com wrote:> Hi,
>
> > How do I find out what folder a script is in while it is executing?
>
> > For example, for the file "C:/folder/script.py" contain the following
> > two lines of code -
>
> > myLocation = GetMyLocation()
> > print myLocation
>
> def GetMyLocation():
>     runningFile = sys.argv[0] if __name__ == "__main__" else __file__
>     return os.path.dirname(runningFile)
>
>
>
> > >> C:/folder
>
> > Thanks,
>
> > Aine.

As I understand it, this is one portable way to do it:

path = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]),
'.'))

Mike



From aleax at mac.com  Mon Aug 27 10:46:29 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 27 Aug 2007 07:46:29 -0700
Subject: How to free memory ( ie garbage collect) at run time with Python
	2.5.1(windows)
References: <1188224306.863247.127890@50g2000hsm.googlegroups.com>
Message-ID: <1i3hujk.ulsjt32wqtq0N%aleax@mac.com>

rfv-370 <robert.vergnes at yahoo.fr> wrote:

> have made the following small test:
> 
> Before starting my test my UsedPhysicalMemory(PF): 555Mb
> 
> >>>tf=range(0,10000000)    PF: 710Mb ( so 155Mb for my List)
> >>>tf=[0,1,2,3,4,5]             PF: 672Mb (Why? Why the remaining 117Mb is
> >>>not freed?) del tf                            PF: 672Mb (unused memory
> >>>not freed)

Integer objects that are once generated are kept around in a "free list"
against the probability that they might be needed again in the future (a
few other types of objects similarly keep a per-type free-list, but I
think int is the only one that keeps an unbounded amount of memory
there).  Like any other kind of "cache", this free-list (in normal
cases) hoards a bit more memory than needed, but results in better
runtime performance; anomalous cases like your example can however
easily "bust" this too-simple heuristic.

> So how can I force Python to clean the memory and free the memory that
> is not used?

On Windows, with Python 2.5, I don't know of a good approach (on Linux
and other Unix-like systems I've used a strategy based on forking, doing
the bit that needs a bazillion ints in the child process, ending the
child process; but that wouldn't work on Win -- no fork).

I suggest you enter a feature request to let gc grow a way to ask every
type object to prune its cache, on explicit request from the Python
program; this will not solve the problem in Python 2.5, but work on 3.0
is underway and this is just the right time for such requests.


Alex


From duncan.booth at invalid.invalid  Wed Aug  1 03:35:30 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 1 Aug 2007 07:35:30 GMT
Subject: Iteration over strings
References: <46AF9F55.20105@gmx.net> <46AFA1D9.1010707@gmx.net>
	<mailman.1403.1185926092.22759.python-list@python.org>
Message-ID: <Xns997F576915189duncanbooth@127.0.0.1>

Jay Loden <python at jayloden.com> wrote:

> This isn't just a problem with the socket module, so please don't
> think I'm picking on it or singling it out, it's something I've seen a
> number of places. e.g. from os.stat: 
> 
> os.stat = stat(...)
>     stat(path) -> stat result
>     
>     Perform a stat system call on the given path.
> 
> Ok...and what is the return value? a list? tuple? string? some type of
> stat object? dictionary? The only way to find out is to read the os
> module's source code or try it to find out. If you were really lucky
> you might find the related documentation from class statvfs_result and
> put two and two together to figure it out. 

Or if you were really, really lucky you might try reading the 
documentation (http://docs.python.org/lib/os-file-dir.html):

stat( path) 

Perform a stat() system call on the given path. The return value is an 
object whose attributes correspond to the members of the stat structure, 
namely: st_mode (protection bits), st_ino (inode number), st_dev 
(device), st_nlink (number of hard links), st_uid (user ID of owner), 
st_gid (group ID of owner), st_size (size of file, in bytes), st_atime 
(time of most recent access), st_mtime (time of most recent content 
modification), st_ctime (platform dependent; time of most recent 
metadata change on Unix, or the time of creation on Windows): 

>>> import os
>>> statinfo = os.stat('somefile.txt')
>>> statinfo
(33188, 422511L, 769L, 1, 1032, 100, 926L, 1105022698,1105022732, 
1105022732)
>>> statinfo.st_size
926L
>>>

Changed in version 2.3: If stat_float_times returns true, the time 
values are floats, measuring seconds. Fractions of a second may be 
reported if the system supports that. On Mac OS, the times are always 
floats. See stat_float_times for further discussion. 

On some Unix systems (such as Linux), the following attributes may also 
be available: st_blocks (number of blocks allocated for file), 
st_blksize (filesystem blocksize), st_rdev (type of device if an inode 
device). st_flags (user defined flags for file). 

On other Unix systems (such as FreeBSD), the following attributes may be 
available (but may be only filled out if root tries to use them): st_gen 
(file generation number), st_birthtime (time of file creation). 

On Mac OS systems, the following attributes may also be available: 
st_rsize, st_creator, st_type. 

On RISCOS systems, the following attributes are also available: st_ftype 
(file type), st_attrs (attributes), st_obtype (object type). 

For backward compatibility, the return value of stat() is also 
accessible as a tuple of at least 10 integers giving the most important 
(and portable) members of the stat structure, in the order st_mode, 
st_ino, st_dev, st_nlink, st_uid, st_gid, st_size, st_atime, st_mtime, 
st_ctime. More items may be added at the end by some implementations. 
The standard module stat defines functions and constants that are useful 
for extracting information from a stat structure. (On Windows, some 
items are filled with dummy values.) 

Note: The exact meaning and resolution of the st_atime, st_mtime, and 
st_ctime members depends on the operating system and the file system. 
For example, on Windows systems using the FAT or FAT32 file systems, 
st_mtime has 2-second resolution, and st_atime has only 1-day 
resolution. See your operating system documentation for details. 

Availability: Macintosh, Unix, Windows. 

Changed in version 2.2: Added access to values as attributes of the 
returned object. Changed in version 2.5: Added st_gen, st_birthtime. 



From steve at holdenweb.com  Fri Aug 31 21:50:34 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 31 Aug 2007 21:50:34 -0400
Subject: Parameter Passing - String Variable Truncated ?
In-Reply-To: <fbag04$ugc$2@sea.gmane.org>
References: <1188604442.700651.94530@19g2000hsx.googlegroups.com>
	<fbag04$ugc$2@sea.gmane.org>
Message-ID: <46D8C56A.8020402@holdenweb.com>

Steve Holden wrote:
[...]
>> in_featclass = sys.argv[1]
> 
> Try
> 
>    in_featclass = sys.argv[1:]
> 
Sorry, that should have been

     in_featclass = " ".join(sys.argv[1:])+"\n"

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From inmmike at gmail.com  Sun Aug 19 12:39:43 2007
From: inmmike at gmail.com (inmmike at gmail.com)
Date: Sun, 19 Aug 2007 09:39:43 -0700
Subject: "Variable variable name" or "variable lvalue"
In-Reply-To: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
References: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
Message-ID: <1187541583.607550.107230@57g2000hsv.googlegroups.com>

On Aug 15, 1:42 pm, mfglinux <mfgli... at gmail.com> wrote:
> Hello to everybody
>
> I would like to know how to declare in python a "variable name" that
> it is in turn a variable
> In bash shell I would wrote sthg like:
>
> for x in `seq 1 3`
> do
>   M$i=Material(x)  #Material is a python class
> done
>
> Why I need this? Cause I have a python module that obliges me to build
> a variable called Period, which should have a variable name of
> summands (depends on the value of x)
>
> #Let's say x=3, then Period definition is
> Period=Slab(Material1(12.5)+Material2(25)+Material3(12.5)) #Slab is a
> python class
>
> I dont know how to automatize last piece of code for any x
>
> thank you
>
> Marcos

Regardless of whether or not this is a "best practice" sometimes it is
necessary. For example, I am looping through a dictionary to set some
class properties. Anyway, here is what I finally came up with:

exec "self.%s = '%s'" % (item, plist[item])

A more simple example for setting a variable outside of a class...

exec '%s = '%s'" % ('variableName', 'variable value')

Cheers!
Mike



From max at alcyone.com  Mon Aug 13 13:58:27 2007
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 13 Aug 2007 10:58:27 -0700
Subject: negative polar axis
In-Reply-To: <mailman.1918.1187013003.22759.python-list@python.org>
References: <1186999666.642856.16820@19g2000hsx.googlegroups.com>
	<mailman.1918.1187013003.22759.python-list@python.org>
Message-ID: <puednd-H8IReBl3bnZ2dnUVZ_s7inZ2d@speakeasy.net>

Steve Holden wrote:

> About the best interpretation I can think of is to add 180 degrees to 
> the angle and reverse the sign of the magnitude, but this would be a 
> hack. Where are those coordinates coming from?

Well, sometimes in polar coordinates (r, theta), r is allowed to be 
negative.  The usual translation from polar to Cartesian coordinates 
makes this meaningful, albeit weird, so in effect the resulting 
positions are just reflections around the origin.

Which I suppose is what the original poster was asking about, but it's 
still not clear.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   The conviction of wisdom is the plague of man.
    -- Montaigne


From evan at yelp.com  Thu Aug  9 00:51:21 2007
From: evan at yelp.com (Evan Klitzke)
Date: Wed, 8 Aug 2007 21:51:21 -0700
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <5hv7jeF3m75aqU1@mid.individual.net>
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de> <877io9soa1.fsf@pobox.com>
	<46B63F0E.8030208@v.loewis.de> <87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<7xzm15q8fy.fsf@ruckus.brouhaha.com>
	<1186583168.447608.114040@d55g2000hsg.googlegroups.com>
	<5hv7jeF3m75aqU1@mid.individual.net>
Message-ID: <cfb58d850708082151u7196d854o140e6acf5df04e2c@mail.gmail.com>

On 8/8/07, greg <greg at cosc.canterbury.ac.nz> wrote:
> Istvan Albert wrote:
> > A solution would be writing the code with a logging function to begin
> > with, alas many times that is out of one's hand.
>
> If the code has been written with calls to a builtin
> print function, the situation isn't much better. You
> could monkeypatch the print function, but that's
> probably worse than swapping sys.stdout.

You can easily modify print in a safe way. Here's an example, that
will work in any recent version of Python:

import sys

def print_(s):
    print s

def logger(method):
    def wrapper(s):
        sys.stderr.write('Logging: %s\n' % s)
        method(s)
    return wrapper

print_ = logger(print_)

print_('hello')


Running this code will do a regular print of 'hello', as well as
"logging" it to stderr. As a function, you can convert print wholesale
to another logging function, or wrap it transparently like this to
provide additional logging functionality. What do you find wrong with
this sort of "monkeypatching"?

-- 
Evan Klitzke <evan at yelp.com>


From pyth0nc0d3r at gmail.com  Fri Aug 24 14:49:55 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Fri, 24 Aug 2007 13:49:55 -0500
Subject: Fwd: I can't get value of entry box, Tinker
In-Reply-To: <1187980089.367178.81060@e9g2000prf.googlegroups.com>
References: <eb79828c0708240816o182b1e75o67fc9b27b6475051@mail.gmail.com>
	<mailman.268.1187975584.32294.python-list@python.org>
	<1187980089.367178.81060@e9g2000prf.googlegroups.com>
Message-ID: <eb79828c0708241149g1e31ed98g9f764f12a40b7888@mail.gmail.com>

yes, I already fixed the problem.

---------- Forwarded message ----------
From: 7stud <bbxx789_05ss at yahoo.com>
Date: Aug 24, 2007 1:28 PM
Subject: Re: I can't get value of entry box, Tinker
To: python-list at python.org

Matt McCredie wrote:
> > What/should I, can I do?
>
> Fix your code?
>
> > def login():
> >     global e2,e1
> >     print e2.get()
> >     print e1.get()
>
> That should work.
>
> Matt

Try something like this:

import Tkinter as tk

root = tk.Tk()
entry = tk.Entry(root)
button = tk.Button(root, text="print text in textbox")

def on_button_click(event):
    print entry.get()

button.bind("<Button-1>", on_button_click)

entry.pack()
button.pack()
root.mainloop()

--
http://mail.python.org/mailman/listinfo/python-list
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From rrs at researchut.com  Tue Aug 14 10:24:07 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Tue, 14 Aug 2007 19:54:07 +0530
Subject: Module imports during object instantiation
References: <4c3vo4-u7k.ln1@learner.hq.netapp.com> <f9pcuj$6n4$1@sea.gmane.org>
	<mailman.1931.1187030415.22759.python-list@python.org>
	<46c16ec9$0$405$426a34cc@news.free.fr>
	<mailman.1956.1187091452.22759.python-list@python.org>
	<slrnfc36p9.21o.horpner@FIAD06.norwich.edu>
Message-ID: <7hq8p4-hll.ln1@learner.hq.netapp.com>

Neil Cerutti wrote:

> If you want an import inside an __init__ to run, you must call
> the __init__ function that contains it.

Doesn't __init__ get called automatically ?
I thought __init__ was required to be called explicitly only when you were
doing inheritance and wanted to pass separate values to the base class.

Ritesh
-- 
If possible, Please CC me when replying. I'm not subscribed to the list.



From chernevik at gmail.com  Sat Aug  4 17:30:07 2007
From: chernevik at gmail.com (chernevik at gmail.com)
Date: Sat, 04 Aug 2007 14:30:07 -0700
Subject: Question -- Running Programming Python Examples
Message-ID: <1186263007.587499.305340@57g2000hsv.googlegroups.com>

Here is a newbie question: how do I get the server examples in the
Preview chapter of  "Progamming Python" (Lutz) to run?  The code is
supposed to be a little webserver on which to run examples, but when I
run it it I get "permission denied".  Running it as root gets "address
already in use".

Here is the code (it's example 2.32); comments are from Lutz, not me:

webdir = '.'   # where your html files and cgi-bin script directory
live

port   = 80    # default http://localhost/, else use http://localhost:xxxx/



import os, sys

from BaseHTTPServer import HTTPServer

from CGIHTTPServer  import CGIHTTPRequestHandler



# hack for Windows: os.environ not propogated

[deleted, I'm running linux]
. . .

os.chdir(webdir)                                       # run in html
root dir

srvraddr = ("", port)                                  # my hostname,
portnumber

srvrobj  = HTTPServer(srvraddr, CGIHTTPRequestHandler)

srvrobj.serve_forever()                                # run as
perpetual demon


END CODE


My other python scripts run fine.

I'm running linux (debian).  I'm not running an webserver (that I know
of anyway).

I've fiddled with adding the subdirectory with the code to the python
path, but this doesn't seem to help either.  I'm new to all this, but
I've been able to make the other stuff work, and I can't even find the
beginning of what I'm supposed to research to fix this.

Any help would be greatly appreciated, and thanks for your time and
patience.



From larry.bates at websafe.com  Mon Aug 13 10:31:20 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 13 Aug 2007 09:31:20 -0500
Subject: Drawing a graph
In-Reply-To: <mailman.1917.1187012829.22759.python-list@python.org>
References: <mailman.1917.1187012829.22759.python-list@python.org>
Message-ID: <46C06B38.2070507@websafe.com>

Ghirai wrote:
> Hello list,
> 
> I need to draw a graph, 2 axes, 2D, nothing fancy.
> One of the axes is time, the other one is a series of integers.
> 
> I don't care much about the output format.
> 
> Are there any specialized libraries for this, or should i use PIL?
> 
> Thanks.
> 
ReportLab graphics works for me.

www.reportlab.org

-Larry


From tn.pablo at gmail.com  Sun Aug 19 19:53:52 2007
From: tn.pablo at gmail.com (Pablo Torres)
Date: Sun, 19 Aug 2007 23:53:52 -0000
Subject: Syntax Question - list multiplication
In-Reply-To: <4L3yi.61391$W21.1628190@phobos.telenet-ops.be>
References: <1187560273.146491.90530@r29g2000hsg.googlegroups.com>
	<4L3yi.61391$W21.1628190@phobos.telenet-ops.be>
Message-ID: <1187567632.967080.78400@r29g2000hsg.googlegroups.com>

Thanks everyone. Now I see why every row in my grid were actually the
same object.

Pablo



From knipknap at gmail.com  Fri Aug  3 16:58:53 2007
From: knipknap at gmail.com (Samuel)
Date: Fri, 03 Aug 2007 13:58:53 -0700
Subject: ANNOUNCE: Spiff Workflow 0.0.1 (Initial Release)
Message-ID: <1186174733.838817.247450@g4g2000hsf.googlegroups.com>

Introduction
------------
Spiff Workflow is a library implementing a framework for workflows. It
is based on http://www.workflowpatterns.com and implemented in pure
Python. Supported workflow patterns include (at least) the following:

 1. Sequence
 2. Parallel Split
 3. Synchronization
 4. Exclusive Choice
 5. Simple Merge
 6. Multi-Choice
 7. Structured Synchronizing Merge
 8. Multi-Merge
 9. Structured Discriminator
10. Arbitrary Cycles

Spiff Workflow is part of the Spiff platform, which aims to produce a
number of generic libraries generally needed in enterprise
applications. This release is the initial release and SHOULD NOT BE
USED IN PRODUCTION ENVIRONMENTS - this release is meant for
development only.

Spiff Workflow is free software and distributed under the GNU
LGPLv2.1.

Dependencies
-------------
Python >= 2.4

Download
---------
The release page is here:
http://pypi.python.org/pypi/Spiff%20Workflow/0.0.1

You can also check the code out of SVN:
svn checkout http://spiff.googlecode.com/svn/trunk/libs/Workflow/

Links:
-------
Spiff project page: http://code.google.com/p/spiff/
Mailing list: http://groups.google.com/group/spiff-devel
Bug tracker: http://code.google.com/p/spiff/issues/list
Documentation: http://spiff.googlecode.com/svn/trunk/libs/Workflow/README
Browse the source: http://spiff.googlecode.com/svn/trunk/libs/Workflow/

If you have any questions, please do not hesitate to ask.

-Samuel



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  9 12:07:09 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 09 Aug 2007 18:07:09 +0200
Subject: Help with Dictionaries and Classes requested please.
In-Reply-To: <46bb19e2$0$9835$7b0f0fd3@mistral.news.newnet.co.uk>
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
	<87ejic6dkw.fsf@benfinney.id.au>
	<46bb19e2$0$9835$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <46bb3ba5$0$423$426a34cc@news.free.fr>

special_dragonfly a ?crit :
> "Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote in message 
> news:87ejic6dkw.fsf at benfinney.id.au...
>> "special_dragonfly" <Dominic at PLEASEASK.co.uk> writes:
>>
>>> I've managed to solve the problem, I really was just being a
>>> dunce.
>> Doubtful; but at this stage we can't tell, because we still don't know
>> what it is you're actually trying to *do*.
>>
>>> Here's how incase anyone is wondering:
>>>
>>> class MyClass:
>>>     def __init__(self):
>>>         name=""
>>> dict={}
>>> dict[0]=[]
>>> dict[0].append(MyClass())
>>> dict[0][0].name="Hello"
>>> print dict[0][0].name
>> It's not clear why you are using the value 0 for a dictionary key
>> here; nor why you're assigning an attribute to an object after
>> creating the object. Neither of them are errors, but without context
>> it's hard to know what advice to give.
>>
> The 0 for a key is just an example. The code I actually have would be just 
> as meaningful at the end of the day. I could have changed MyClass for
> class Animals(object):
>     def __init__(self, name="", type="", age=""):
>         self.name=name
>         self.type=type
>         self.age=age
> 
> dict={'Mouse':[Animals('George','long eared',20)]}
> dict['Mouse'].append(Animals('Benny','hairy',30))
> dict['Cat']=[Animals('Inigo Montoya','spanish',10)]
> 
> and Neil, Bruno has the right idea of what I was trying to do. However, your 
> code came in handy still as I used your code elsewhere.see below.
> 
> def EnterDictionary(FieldsDictionary,key,data):
>     for i in range(0,int(data[6:])):
>         line=myfile.readline()
>         line=line.strip()
>         line=line[6:-1]
>         if key in FieldsDictionary:
>             FieldsDictionary[key].append(FieldClass(*line.split(",")))
>         else:
>             FieldsDictionary[key]=[FieldClass(*line.split(","))]

May I suggest a couple possible improvements ?

First : you're of course free to use any naming convention you like, and 
it's obviously better to stay consistent, but the canonical Python 
convention is to use all_lower for vars, functions (and methods) and 
modules, and MixedCase for classes.

About the code now:

def EnterDictionary(FieldsDictionary,key,data):
     for i in range(0,int(data[6:])):

1/ Golden rule : avoid the use of "magic numbers". This one stands true 
for any languages !-). The usual solution is to use symbolic constants. 
While Python doesn't have real symbolic constant, the convention is to 
write them ALL_UPPER.

2/ range() can be used with only one argument, which then will be use as 
the upper bound. IOW,
   range(0, X)
is the same as
   range(X)

         line=myfile.readline()

3/ where does this 'myfile' comes from ? (hint : don't use globals when 
you can avoid them)


         line=line.strip()
         line=line[6:-1]

4/ magic numbers again, cf /1. Question : does this 6 has anything to do 
with the other one ? What will happen when the file format will change ?

5/ you can do all this in a single line, adding the split() too:
         args = myfile.readline().strip()[XXX:-1].split(",")

 >         if key in FieldsDictionary:
 >             FieldsDictionary[key].append(FieldClass(*line.split(",")))
 >         else:
 >             FieldsDictionary[key]=[FieldClass(*line.split(","))]


If you expect key to most of the times be already in FieldsDictionnary, 
then a try/except block might be a bit faster. If you expect key to not 
be here most of the times, then your solution is right. Note that you 
can also use dict.setdefault(key, default):

# probably bad names but I don't have a clue what they should be
DATA_INDEX_OFFSET = 6
LINE_START = 6
LINE_END = -1

def update_fields_dict(fields_dict, key, data, datafile):
   for i in range(int(data[DATA_INDEX_OFFSET:])):
     args =datafile.readline().strip()[LINE_START:LINE_END].split(",")
     fields_dict.setdefault(key, []).append(FieldClass(*args))

Feel free to take or leave what you consider appropriate here. But by 
all means avoid magic numbers, except possibly for Q&D throw-away 
scripts (and even then...).

HTH

> In future I would ask however, if it's a really stupid question and you feel 
> that the answer can be found either by searching google (because in some 
> cases I don't know what to search for), or in one of the O'reilly books, 
> just say. In either case, if you could refer me to the search term to use or 
> the book to read I'd be grateful.

That's usually what happens then, don't worry.


From DustanGroups at gmail.com  Sat Aug 11 17:11:45 2007
From: DustanGroups at gmail.com (Dustan)
Date: Sat, 11 Aug 2007 21:11:45 -0000
Subject: Metaclass v.s. Property function.
In-Reply-To: <1186835613.178733.81210@q75g2000hsh.googlegroups.com>
References: <1186835613.178733.81210@q75g2000hsh.googlegroups.com>
Message-ID: <1186866705.316748.68980@22g2000hsm.googlegroups.com>

On Aug 11, 7:33 am, Jens Thiede <jensthi... at gmail.com> wrote:
> I don't like the property function, usable in the new-style classes,
> because having to remember to manage a list of "foo = property(...)"
> assignments just plain sucks, so I wrote a metaclass that does things
> a little differently. Please have a look and tell me whether this is
> useful or impractical. The metaclass is here:http://pastebin.com/m5b06b571
> and some simple testcode is here:http://pastebin.com/m382f2ae9.
> Notice the first line though.

Are you overusing property, by any chance? In your example, bar seems
to be an unneeded property; it could just be a normal attribute.



From mugi at pinesalad.net  Tue Aug 21 05:29:14 2007
From: mugi at pinesalad.net (Signal)
Date: Tue, 21 Aug 2007 02:29:14 -0700
Subject: File Read Cache - How to purge?
In-Reply-To: <5ivl9fF3rafecU1@mid.uni-berlin.de>
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
	<5ivl9fF3rafecU1@mid.uni-berlin.de>
Message-ID: <1187688554.043448.212260@l22g2000prc.googlegroups.com>

> What do you mean by so little memory.  It (the whole file) is cached by the
> operating system totally independent of your program.

Please note I already stated it was more than likely by the OS and
noted the tests to confirm that.

> It (the whole file) is cached by the operating system totally independent
> of your program, so the memory used does of course not show up in the memory
> stats of your program... <snip>

In this case the OS is Windows and monitoring the memory usage in Task
Manager, not through the script. The entire 759MB file is not being
cached in memory and only 2MB of memory is used when the script runs.

You can see in the example script that I'm not storing the file in
memory (buf is "overwritten" at each read(size)) and no memory stats
are being kept there. Not sure where I might have eluded otherwise,
but hope this clears that up.

> > 2. Is there anyway to somehow to take advantage of this "caching" by
> > initializing it without reading through the entire file first?
>
> You mean reading the file without actually reading it!?  :-)
>

Think you misunderstood.

What the "tests" are eluding to is:

a. The whole file itself is NOT being cached in memory.
b. If there is mechanism to which it is "caching" something (which
obviously isn't the whole file itself), why not possibly take
advantage of it?

And sometimes there can be "tricks" to "initializing" before actually
read/writing a file to help improve some performance (and not
necessarily via a cache).



From jstroud at mbi.ucla.edu  Mon Aug 20 00:51:06 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 20 Aug 2007 04:51:06 GMT
Subject: yet another indentation proposal
In-Reply-To: <13ci0oesdtlh871@corp.supernews.com>
References: <fEZxi.8855$9W6.6492@fe103.usenetserver.com>
	<13ci0oesdtlh871@corp.supernews.com>
Message-ID: <_49yi.9351$3x.6614@newssvr25.news.prodigy.net>

Dennis Lee Bieber wrote:
> On Sat, 18 Aug 2007 13:22:54 -0500, "Aaron"
> <cajnnjonaj at fjireanjtjprodjuctijons.com> declaimed the following in
> comp.lang.python:
> 
>  
>> column to make sure that everything lines up.  I, on the other hand, 
>> generally find my self counting a lot of spaces.
>>
> 	Forgive me, but that sounds like a valid excuse for me to suggest
> near heresy... and that TABS should be the standard indent mechanism,
> not spaces...
> 
> 	I'd much rather hear: tab tab tab print
> than: space space space space space space space space space space space
> space space space space space space space space space space space space
> space print
> (that many as the Python definition of a tab is eight spaces)

What's wrong with just saying the current indent level? I'd much rather 
hear "indent 4" than "tab tab tab tab".

James


From jomorcsi at gmail.com  Mon Aug  6 14:30:02 2007
From: jomorcsi at gmail.com (jomorcsi at gmail.com)
Date: Mon, 06 Aug 2007 18:30:02 -0000
Subject: automatically setting platform-dependent location for Distutils
	"install-scripts"?
Message-ID: <1186425002.316751.171530@l70g2000hse.googlegroups.com>

Hello all,

I am developing a Python-based tool that will be deployed both in a
Windows and in a Linux
environment, and I have a question concerning the use of the Distutils
module to manage the
installation of the tool in a transparent manner.

A bit of background info:
1. (I am using Python version 2.5)
2. Let's assume that the tool is named "xyz"
3. It is internally partitioned into two parts:
    xyzScript.py -- the front-end script that the users actually
invoke, and
    xyzPackage -- a package containing the "guts" of the tool
4. Users do not really care where the "xyzPackage" part is installed
--
    and thus by default it will be installed into Python's standard
"site-packages" directory.
5. However, users *do* care where the "xyzScript.py" part is installed

Now, I have created a Distutils-based "setup.py" script that looks
like this:
from distutils.core import setup

>
> setup(name='xyz',
>       version="1.0",
>       # provide other metadata, such as 'description', 'author', 'author_email', 'url', ... etc.
>
>       packages=['xyzPackage'],
>
>       scripts=['xyzScript.py'])
>

... that takes care of the above concerns, and also accepts a
"setup.cfg" configuration file that
allows the user to control into which directory to install the
"xyzScript.py" part, as follows:

>
> [install]
> install-scripts=C:\xyzScriptDirectory
>

And thus, here is my problem:

[1] At any given moment, the directory name specified in the above
"setup.cfg" file
    can be either a "Windows-style" directory (as is shown above)
    or a "Linux-style" directory (say "/opt/xyzScriptDirectory"), but
not both!

[2] I would like to have a *single* "setup.cfg" file that can
nevertheless be used for *both*
    Windows and Linux, *without* having to be edited by the user.

For example, it would be really nice if I can have a customized
"setup.cfg" file that looks like:

>
> [install]
> install-scripts-Windows=C:\xyzScriptDirectory
> install-scripts-Linux=/opt/xyzScriptDirectory
>

... and then some part of Distutils can query "os.name" and set the
"real" 'install-scripts' option
to the appropriate one of these two choices.

I assume this can be done by "overriding" and customizing part of
Distutils.
Indeed, I have already done something similar by overriding
"distutils.command.build_scripts"
to use a customized "copy_scripts()" method.

However, it is not clear to me in what manner I can/should
override "distutils.command.install_scripts" to achieve the effect
that I desire.

Is this at all the way to go, or might there be a totally obvious way
to do this
that I am currently overlooking?

If anyone has similar experience in tweaking Distutils, I would be
most appreciative of any
advice that you can offer.

Thanks in advance!



From gerard.blais at gmail.com  Fri Aug 17 11:49:49 2007
From: gerard.blais at gmail.com (Gerry)
Date: Fri, 17 Aug 2007 15:49:49 -0000
Subject: Question on SPE and pwintypes.dll
In-Reply-To: <1187360049.391743.9980@l22g2000prc.googlegroups.com>
References: <1187357898.740425.33170@r29g2000hsg.googlegroups.com>
	<1187360049.391743.9980@l22g2000prc.googlegroups.com>
Message-ID: <1187365789.251660.286300@22g2000hsm.googlegroups.com>

On Aug 17, 10:14 am, kyoso... at gmail.com wrote:
> On Aug 17, 8:38 am, Gerry <gerard.bl... at gmail.com> wrote:
>
> >    I'm running SPE 8.3.c under XP, on a new PC.
>
> >    The files for SPE and Python were copied to the new machine, but
> > the OS wasn't migrated, so the registry didn't know about either.
>
> >    I reinstalled Python 2.5.1, and Python seems fine.
>
> >    I made a shortcut to SPE.pyw.  Clicking on the shortcut gives an
> > error pop-up, application failed to start cannot find pwintypes.dll.
> > When I click "OK", SPE seems to start normally.
>
> >    Any idea what's up?  Googling for pwintypes.dll didn't give me any
> > hits.
>
> >    Gerry
>
> Probably just need to do a search in the registry of the old PC for
> SPE or that dll file and then make the appropriate changes on your new
> PC. Or just reinstall SPE.
>
> Mike

Thanks -- I'll give that a try.

Gerry



From conra2004 at yahoo.com  Fri Aug 17 11:43:15 2007
From: conra2004 at yahoo.com (yadin)
Date: Fri, 17 Aug 2007 08:43:15 -0700
Subject: help to make program better
Message-ID: <1187365395.441992.198880@k79g2000hse.googlegroups.com>

hi!
Can any one tell me why is it that i can't see my second frame and why
is the value of freq not Appended in the First frame ...thanks
I know it is wx python  but it has to do with passing variables.thanks

import wx

def create(parent):
    return Frame1(parent)

[wxID_FRAME1, wxID_FRAME1FREQ, wxID_FRAME1FREQDISP,
wxID_FRAME1STATICTEXT1,
] = [wx.NewId() for _init_ctrls in range(4)]

class Frame1(wx.Frame):
    def _init_ctrls(self, prnt):
        # generated method, don't edit
        wx.Frame.__init__(self, id=wxID_FRAME1, name='', parent=prnt,
              pos=wx.Point(380, 179), size=wx.Size(241, 133),
              style=wx.DEFAULT_FRAME_STYLE, title='Frame1')
        self.SetClientSize(wx.Size(233, 99))

        self.staticText1 = wx.StaticText(id=wxID_FRAME1STATICTEXT1,
              label='frequency disp', name='staticText1', parent=self,
              pos=wx.Point(24, 32), size=wx.Size(71, 13), style=0)

        self.freqdisp = wx.TextCtrl(id=wxID_FRAME1FREQDISP,
name='freqdisp',
              parent=self, pos=wx.Point(104, 24), size=wx.Size(100,
21),
              style=0, value='')

        self.freq = wx.Button(id=wxID_FRAME1FREQ, label='get freq',
name='freq',
              parent=self, pos=wx.Point(24, 56), size=wx.Size(184,
23),
              style=0)
        self.freq.Bind(wx.EVT_BUTTON, self.OnButton1Button,
id=wxID_FRAME1FREQ)

    def __init__(self, parent):
        self._init_ctrls(parent)

    def OnButton1Button(self, event):

        def create(parent):
            return Frame2(parent)
        [wxID_FRAME2, wxID_FRAME2FREQ, wxID_FRAME2FREQDISP,
wxID_FRAME2STATICTEXT1,] = [wx.NewId() for _init_ctrls in range(4)]

        class Frame2:
            def __init__(self):
                #
                wx.Frame.__init__(self, id=wxID_FRAME2, name='',
parent=prt,
                      pos=wx.Point(400, 179), size=wx.Size(300, 133),
                      style=wx.DEFAULT_FRAME_STYLE, title='Frame2')
                self.SetClientSize(wx.Size(233, 99))

                self.staticText1 =
wx.StaticText(id=wxID_FRAME2STATICTEXT1,
                      label='frequency goes here first',
name='staticText2', parent=self,
                      pos=wx.Point(24, 32), size=wx.Size(71, 13),
style=0)

                self.freqdisp2 = wx.TextCtrl(id=wxID_FRAME2FREQDISP,
name='freqdisp2',
                      parent=self, pos=wx.Point(104, 24),
size=wx.Size(100, 21),
                      style=0, value=' ')

                self.freq = wx.Button(id=wxID_FRAME2FREQ, label='get
freq', name='freq',
                      parent=self, pos=wx.Point(24, 56),
size=wx.Size(184, 23),
                      style=0)
                self.freq.Bind(wx.EVT_BUTTON, self.OnButton2Button,
id=wxID_FRAME2FREQ)

            def __init__(self, parent):
                self._init_ctrls(parent)
            def OnButton2Button(self, event):
                freqdisp.Append('this is it 24HZ!')

if __name__ == '__main__':
    app = wx.PySimpleApp()
    frame = create(None)
    frame.Show()

    app.MainLoop()



From bbxx789_05ss at yahoo.com  Thu Aug 30 14:13:14 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Thu, 30 Aug 2007 11:13:14 -0700
Subject: gc.garbage
In-Reply-To: <46D692FC.4030805@v.loewis.de>
References: <1188467173.708043.44800@w3g2000hsg.googlegroups.com>
	<46D692FC.4030805@v.loewis.de>
Message-ID: <1188497594.577267.34690@q4g2000prc.googlegroups.com>

On Aug 30, 3:50 am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > gc.set_debug(gc.DEBUG_LEAK)
> > print gc.garbage
>
> > --output:--
> > []
> > gc: uncollectable <Dog 0x56e10>
> > gc: uncollectable <Cat 0x56e30>
> > gc: uncollectable <dict 0x58270>
> > gc: uncollectable <dict 0x43e40>
>
> gc.garbage is filled only after these messages
> are printed, not before. You need to add an explicit
> call to gc.collect() if you want to see what
> uncollectable garbage you have.
>
> Regards,
> Martin

Hi,

Thanks for the response.  Now, when I run the code:

------------
import gc

class Cat(object):
    pass

class Dog(object):
    pass

def some_func():
    the_dog = Dog()
    the_cat = Cat()
    the_dog.cat = the_cat
    the_cat.dog = the_dog

some_func()

gc.set_debug(gc.DEBUG_LEAK)
gc.collect()
print gc.garbage
----------------

I get this output:

-------------
gc: uncollectable <Dog 0x56e10>
gc: uncollectable <Cat 0x56e30>
gc: uncollectable <dict 0x58300>
gc: uncollectable <dict 0x43e40>
[<__main__.Dog object at 0x56e10>, <__main__.Cat object at 0x56e30>,
{'cat': <__main__.Cat object at 0x56e30>}, {'dog': <__main__.Dog
object at 0x56e10>}]
---------------

Why are there two entries in the list for each uncollectable object?
Also, I haven't bound the names "cat" or "dog" anywhere in my
program.  What do those names mean in the list?

Doing some more testing, if I remove the __del__ methods:

---------------
class Cat(object):
    pass

class Dog(object):
    pass

def some_func():
    the_dog = Dog()
    the_cat = Cat()
    the_dog.cat = the_cat
    the_cat.dog = the_dog

some_func()

gc.set_debug(gc.DEBUG_LEAK)
gc.collect()
print gc.garbage
-----------

I get this output:

-----------------
gc: collectable <Dog 0x56e10>
gc: collectable <Cat 0x56e30>
gc: collectable <dict 0x58270>
gc: collectable <dict 0x43e40>
[<__main__.Dog object at 0x56e10>, <__main__.Cat object at 0x56e30>,
{'cat': <__main__.Cat object at 0x56e30>}, {'dog': <__main__.Dog
object at 0x56e10>}]
----------------

Now the objects are marked as collectable.  The docs say:

----
garbage
A list of objects which the collector found to be unreachable but
could not be freed (uncollectable objects).
----

So, I expected gc.garbage to be empty.  The docs also say:

----
garbage
...By default, this list contains only objects with __del__() methods.
----




From kay.schluehr at gmx.net  Sun Aug 12 00:06:49 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sat, 11 Aug 2007 21:06:49 -0700
Subject: Destruction of generator objects
In-Reply-To: <20070811145033.18c70c0c@cube.tz.axivion.com>
References: <20070808002852.6228ae91@cube.tz.axivion.com>
	<1186613044.494852.306970@q75g2000hsh.googlegroups.com>
	<20070809011441.05d7dfb6@cube.tz.axivion.com>
	<1186819365.988117.232230@g4g2000hsf.googlegroups.com>
	<20070811121630.1b010eab@cube.tz.axivion.com>
	<1186831173.814193.235420@o61g2000hsh.googlegroups.com>
	<20070811140017.22a11f82@cube.tz.axivion.com>
	<1186834823.389706.137980@r34g2000hsd.googlegroups.com>
	<20070811145033.18c70c0c@cube.tz.axivion.com>
Message-ID: <1186891609.803641.185700@k79g2000hse.googlegroups.com>

On Aug 11, 2:50 pm, Stefan Bellon <sbel... at sbellon.de> wrote:

> So why is the destructor not called when the generator is even
> explicitly 'del'ed? Does somebody else still hold a reference on it?

You ( we ) have produced a reference cycle. In that case __del__
doesn't work properly ( according to the docs ). The cycle is caused
by the following assignment in your code:

   self.gen = self._value()

So we have to refactor the solution to eliminate the cycle. I spent
some time to create a generic decorator solution and a protocol for
handling / releasing the resources.

1) Create a FinalizerGenerator class that is cycle free ( of course
you can find a trick to shoot yourself in your foot ). Pass a
generator function together with its arguments into the constructor.
An additional callable attribute close is used together with __del__.

class FinalizerGenerator(object):
    def __init__(self, gen, *args, **kwd):
        print "gen init"
        self._gen = gen    # no cycle when passing the _value function
        self.close = lambda: sys.stdout.write("gen del")  # assign
cleanup function

    def __del__(self):
        self.close()

    def __iter__(self):
        print "gen iter"
        return self

    def next(self):
        print "gen next"
        return self.gen.next()

2) Define generators s.t. they yield the resource to be destroyed as
their first value.

def producer(resource):
    print "gen value"
    yield resource       # yield resource before start iteration
    for item in resource:
        yield item

3) Define the destructor for the resource. The resource must be passed
as a first argument. The return value is a callable without arguments
that serves as a close() function within FinalizerGenerator.__del__
method.

def close_resource(resource):
    return lambda: sys.stdout.write("close resource: %s"%resource)

4) The finalize_with decorator

def finalize_with(close_resource):
    def closing(func_gen):
        def fn(*args, **kwd):
            # fg serves as a replacement for the original generator
func_def
            fg = FinalizerGenerator(func_gen)(*args, **kwd)
            # apply the closing protocol
            resource = fg.next()
            fg.close = close_resource(resource)
            return fg
        fn.__name__ = func_gen.__name__
        return fn
    return closing


5) decorate the generator and check it out

@finalize_with(close_resource)
def producer(resource):
    print "gen value"
    yield resource
    for item in resource:
        yield item

def test():
    pg = producer([1,2,3])
    pg.next()

>>> test()
gen init
gen next        # request for resource in finalize_with
gen value
gen next
close resource: [1, 2, 3]  # yep




From gnewsg3 at gmail.com  Thu Aug  9 15:47:10 2007
From: gnewsg3 at gmail.com (billiejoex)
Date: Thu, 09 Aug 2007 12:47:10 -0700
Subject: tempfile behavior
In-Reply-To: <1186684291.629191.185070@z24g2000prh.googlegroups.com>
References: <1186683707.869668.316360@g4g2000hsf.googlegroups.com>
	<1186684291.629191.185070@z24g2000prh.googlegroups.com>
Message-ID: <1186688830.051531.13560@z24g2000prh.googlegroups.com>

On 9 Ago, 20:31, half.ital... at gmail.com wrote:
> On Aug 9, 11:21 am, billiejoex <gnew... at gmail.com> wrote:
>
> > Hi all,
> > I would like to use tempfile module to generate files having unique
> > names excepting that I don't want them to be removed after closing.
> > Does it is possible?
>
> Looks like tempfile.mkstemp() will do what you want.
>
> '''Unlike TemporaryFile(), the user of mkstemp() is responsible for
> deleting the temporary file when done with it.'''
>
> ~Sean

Thank you, it seems good.
Just another question:

>>> fd, filename = tempfile.mkstemp()
>>> type(fd)
<type 'int'>

I would expect a file descriptor, not and integer.
How do I have to use it?



From fabiofz at gmail.com  Fri Aug  3 17:25:01 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Fri, 3 Aug 2007 18:25:01 -0300
Subject: Eclipse/PyDev question.
In-Reply-To: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>
References: <1186153119.391091.275860@r34g2000hsd.googlegroups.com>
Message-ID: <cfb578b20708031425p7e3213d2v36733bb868813fff@mail.gmail.com>

On 8/3/07, king kikapu <aboudouvas at panafonet.gr> wrote:
>
> Hi,
> this is actually a question to those of us who use Eclipse and Pydev
> as their main Python developing environment. As i use Eclipse (3.3
> Europa) only for Python and i have nothing to do with Java, is there a
> way to disable/uninstall some Java-specific stuff and make the
> environment actually more snappy ??
>
> thanks for any help
>
>
You can actually just get the Eclipse 'runtime' distribution (without java
stuff) and install pydev with it (latest version -- previous versions had a
dependency on some java stuff). Reference:
http://pydev.blogspot.com/2007/06/pydev-and-jdt-sdk-not-required-anymore.html

Cheers,

Fabio
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From gherron at islandtraining.com  Sat Aug  4 17:47:49 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 04 Aug 2007 14:47:49 -0700
Subject: Question -- Running Programming Python Examples
In-Reply-To: <1186263007.587499.305340@57g2000hsv.googlegroups.com>
References: <1186263007.587499.305340@57g2000hsv.googlegroups.com>
Message-ID: <46B4F405.10302@islandtraining.com>

chernevik at gmail.com wrote:
> Here is a newbie question: how do I get the server examples in the
> Preview chapter of  "Progamming Python" (Lutz) to run?  The code is
> supposed to be a little webserver on which to run examples, but when I
> run it it I get "permission denied".  Running it as root gets "address
> already in use".
>
> Here is the code (it's example 2.32); comments are from Lutz, not me:
>
> webdir = '.'   # where your html files and cgi-bin script directory
> live
>
> port   = 80    # default http://localhost/, else use http://localhost:xxxx/
>   
There's the trouble.   You need special permission to open any of the
ports up through 1023.  As root, you have permission, but apparently
some process already has that port opened, almost certainly a web server
you start up at boot time, probably apache.

So either kill off the web server that has port 80 opened, or better
yet, just change the port to something else.  A common choice is port
8080.  This does not require superuser permission, and is probably free. 
    port = 8080

If you do that, then you access the server on port 8080 with url's that
look like this:

  http://localhost:8080/what/ever/..., or
  http://machine-name:8080/what/ever/...,

Gary Herron
>
>
> import os, sys
>
> from BaseHTTPServer import HTTPServer
>
> from CGIHTTPServer  import CGIHTTPRequestHandler
>
>
>
> # hack for Windows: os.environ not propogated
>
> [deleted, I'm running linux]
> . . .
>
> os.chdir(webdir)                                       # run in html
> root dir
>
> srvraddr = ("", port)                                  # my hostname,
> portnumber
>
> srvrobj  = HTTPServer(srvraddr, CGIHTTPRequestHandler)
>
> srvrobj.serve_forever()                                # run as
> perpetual demon
>
>
> END CODE
>
>
> My other python scripts run fine.
>
> I'm running linux (debian).  I'm not running an webserver (that I know
> of anyway).
>
> I've fiddled with adding the subdirectory with the code to the python
> path, but this doesn't seem to help either.  I'm new to all this, but
> I've been able to make the other stuff work, and I can't even find the
> beginning of what I'm supposed to research to fix this.
>
> Any help would be greatly appreciated, and thanks for your time and
> patience.
>
>   



From gnewsg at gmail.com  Thu Aug 23 06:48:24 2007
From: gnewsg at gmail.com (billiejoex)
Date: Thu, 23 Aug 2007 03:48:24 -0700
Subject: Impersonate another user temporarily (Unix and Windows)
In-Reply-To: <mailman.161.1187858227.32294.python-list@python.org>
References: <1187809798.274511.230240@z24g2000prh.googlegroups.com>
	<mailman.161.1187858227.32294.python-list@python.org>
Message-ID: <1187866104.967297.324650@j4g2000prf.googlegroups.com>

On 23 Ago, 10:38, Tim Golden <m... at timgolden.me.uk> wrote:
> billiejoex wrote:
> > Hi there. I'm writing a modification for a FTP server library I'm
> > maintaining.
> > Depending on the system I'd want to temporarily impersonate the logged
> > user to perform actions on filesystem.
> > Something like:
>
> > try:
> >     change_user('user', 'password')
> >     os.rmdir('dir')
> > except:
> >     print "some error"
> > finally:
> >     change_user('old_user', 'password')
>
> > On Unix I took at look at os.seteuid() and os.setegid() functions and
> > I noticed they could be useful for my purpose.
> > On Windows I have no idea about how could I emulate a similar
> > behaviour.
> > Could someone please point me in the right direction?
>
> (Warning: not tried, but at least gives you the things to Google for!)
>
> You need the win32security module from the pywin32 extensions. [1]
> In particular, you want to look at the LogonUser and
> ImpersonateLoggedOnUser functions.
>
> TJG
>
> [1]http://pywin32.sf.net- Nascondi testo tra virgolette -
>
> - Mostra testo tra virgolette -

Thanks for suggestion.
I made it.



From david at asdf.asdf  Sun Aug 26 21:58:35 2007
From: david at asdf.asdf (bambam)
Date: Mon, 27 Aug 2007 11:58:35 +1000
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csoronscqp7d2@corp.supernews.com>
	<1188090322.663217.102750@22g2000hsm.googlegroups.com>
Message-ID: <13d4bucfm4m1lc4@corp.supernews.com>

Ok, many environments are capable of cached evaluation
of functions without variable parameters so
    range(5)
is cached, but
    range(v) is re-evaluated every time. Is this defined
behaviour?

That is, is it defined what Python does for
    for i in f()
I'm sure it must be, but I haven't seen it yet. If I have
a user defined function returning a range, is it defined
that the range function is called on every loop? If I
have a function returning a range taking a parameter,
    for i in f(v)
is it defined that the variable is evaluated for every loop?

Steve.


"Paul McGuire" <ptmcg at austin.rr.com> wrote in message 
news:1188090322.663217.102750 at 22g2000hsm.googlegroups.com...
> On Aug 23, 11:50 pm, "bambam" <da... at asdf.asdf> wrote:
>> Thank you, so generallizing:
>>
>> (1) Python re-evaluates the loop range on every loop, and
>> (2) Python does short-circuit evaluation of conditions, in predictable
>> order.
>>
>> Sorry about the bad question.
>>
>
> A beginner would do well to work through the Python Tutorial (http://
> docs.python.org/tut/tut.html).  I think your first "insight" is
> actually incorrect, if I understand your wording.  If I wrote:
>
> for i in range(1000000000):
>    # do something with i
>
> I'm quite certain that range(1000000000) is not evaluated on every
> loop iteration.  In fact, the range call generates a list containing
> the values [0, 1, 2, ..., 999999999], and then for iterates over this
> list.  You can read this at 
> http://docs.python.org/tut/node6.html#SECTION006300000000000000000.
>
> On the other hand, if you are talking about a while loop, of course
> the condition is evaluated on every loop - otherwise such a loop, once
> entered, would never exit.
>
> Your second generalization is stated pretty plainly in
> http://docs.python.org/tut/node7.html#SECTION007700000000000000000.
> In fact, conditional short-circuiting is a consistent theme in most
> Python functions and structures.  The new any() and all() built-ins in
> Python 2.5 for example, evaluate a list of values for their boolean
> True/False-ness, any() returning True if any list entry is True,
> otherwise False; and all() returning True if all entries are True,
> otherwise False.  Both short-circuit their evaluation, so that if the
> first element of a billion element list gives a True value for any()
> (or a False value for all()), then the evaluation of the remaining
> billion-1 items is skipped.
>
> Best of luck in your new Python learning process,
> -- Paul
> 




From victor.lebrun at gmail.com  Wed Aug 22 05:57:25 2007
From: victor.lebrun at gmail.com (vml)
Date: Wed, 22 Aug 2007 09:57:25 -0000
Subject: ActiveX control in python vs ActiveX control in vb 6 (piece of code)
Message-ID: <1187776645.947080.81730@x35g2000prf.googlegroups.com>

Hello,

I am trying to mograte from vb 6 to python.

I have a very usefull AX control. It can be :
    -just a bitmap
    -an active picture where you can plot data and put cursors
    -a data explorer

Those 3 behavior are driven by one property in visual studio when you
insert the AX control in a form: the property ModuleName:
   -'default' for bitmap
   -'Picture' for a picture



I try to insert this AX control in a wxpython based application (I
used one of the example delivered with wx) but when I try to change
the property to get an active picture it does not work and display me
the default bitmap :(


Here is the pice of code


####################################################################################

import wx

if wx.Platform == '__WXMSW__':
    from wx.lib.activexwrapper import MakeActiveXClass
    import win32com.client
    try:
        ocx = win32com.client.gencache.EnsureModule('{33924602-
C29E-4915-91B1-767CA3D675C2}',0x0,1,0)

    except:
        raise ImportError("Can't load ocx")



#----------------------------------------------------------------------


class TestPanel(wx.Panel):
    def __init__(self, parent, log):
        wx.Panel.__init__(self, parent, -1)
        self.pdf = None

        sizer = wx.BoxSizer(wx.VERTICAL)
        btnSizer = wx.BoxSizer(wx.HORIZONTAL)

        # this function creates a new class that can be used as
        # a wxWindow, but contains the given ActiveX control.


        coclass=ocx.ActiveXModuleLoader

        print coclass

        coclass.ModuleName='picture'

        ActiveXWrapper = MakeActiveXClass(coclass)

        # create an instance of the new class
        self.pdf = ActiveXWrapper(self)
        #self.pdf.ModuleName='PictureManager'



        sizer.Add(self.pdf, 1, wx.EXPAND)

        btn = wx.Button(self, wx.NewId(), "Open PDF File")
        wx.EVT_BUTTON(self, btn.GetId(), self.OnOpenButton)
        btnSizer.Add(btn, 1, wx.EXPAND|wx.ALL, 5)

        btn = wx.Button(self, wx.NewId(), "<-- Previous Page")
        wx.EVT_BUTTON(self, btn.GetId(), self.OnPrevPageButton)
        btnSizer.Add(btn, 1, wx.EXPAND|wx.ALL, 5)

        btn = wx.Button(self, wx.NewId(), "Next Page -->")
        wx.EVT_BUTTON(self, btn.GetId(), self.OnNextPageButton)
        btnSizer.Add(btn, 1, wx.EXPAND|wx.ALL, 5)


        btnSizer.Add((50, -1), 2, wx.EXPAND)
        sizer.Add(btnSizer, 0, wx.EXPAND)

        self.SetSizer(sizer)
        self.SetAutoLayout(True)

        wx.EVT_WINDOW_DESTROY(self, self.OnDestroy)


    def OnDestroy(self, evt):
        if self.pdf:
            self.pdf.Cleanup()
            self.pdf = None



    def OnOpenButton(self, event):
        print 'open'


    def OnPrevPageButton(self, event):
        print 'button'

    def OnNextPageButton(self, event):
        print self.pdf.ModuleName

#----------------------------------------------------------------------

def runTest(frame, nb, log):
    if wxPlatform == '__WXMSW__':
        win = TestPanel(nb, log)
        return win
    else:
        dlg = wx.MessageDialog(frame, 'This demo only works on MSW.',
                          'Sorry', wx.OK | wx.ICON_INFORMATION)
        dlg.ShowModal()
        dlg.Destroy()


overview = __doc__

#----------------------------------------------------------------------


if __name__ == '__main__':
    import sys
    class TestFrame(wx.Frame):
        def __init__(self):
            wx.Frame.__init__(self, None, -1, "ActiveX test",
size=(640, 480),
                             style=wx.DEFAULT_FRAME_STYLE|
wx.NO_FULL_REPAINT_ON_RESIZE)
            self.tp = TestPanel(self, sys.stdout)


    app = wx.PySimpleApp()
    frame = TestFrame()
    frame.Show(True)
    app.MainLoop()



#############################################################################

I suspect that the activex control is bugged .... but how to know that
since it is working perfectly under visual studio vb 6 but not with
python ?:(

please help me !



From steve at holdenweb.com  Sun Aug 12 13:49:18 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Aug 2007 13:49:18 -0400
Subject: who is simpler? try/except/else or try/except
In-Reply-To: <46bf4074$0$10626$4fafbaef@reader2.news.tin.it>
References: <46bf4074$0$10626$4fafbaef@reader2.news.tin.it>
Message-ID: <f9nh6r$fhe$1@sea.gmane.org>

Fabio Z Tessitore wrote:
> Hi all,
> 
> reading Dive Into Python, on Chapter 6 (exception), I've found:
> 
> "This code comes from the getpass module, a wrapper module for getting a 
> password from the user"
> 
> try:
> 	import termios, TERMIOS
> except ImportError:
> 	try:
> 		import msvcrt
> 	except ImportError:
> 		try:
> 			from EasyDialogs import AskPassword
> 		except ImportError:
> 			getpass = default_getpass
> 		else:
> 			getpass = AskPassword
> 	else:
> 		getpass = win_getpass
> else:
> 	getpass = unix_getpass
> 
> Knowing that this code is very simple, my question is about simplicity. I 
> think it is simpler the following code. I haven't a long experience on 
> Python, so I'd like to know your opinions about.
> 
> try:
> 	import termios, TERMIOS
> 	getpass = unix_getpass
> 
> except ImportError:
> 	try:
> 		import msvcrt
> 		getpass = win_getpass
> 
> 	except ImportError:
> 		try:
> 			from EasyDialogs import AskPassword
> 			getpass = AskPassword
> 
> 		except ImportError:
> 			getpass = default_getpass
> 
In matters of style such as this there *are* only opinions. I don't 
think there are definite grounds for preferring either one.

If you were to propose such a patch on the python-dev list, it would 
almost certainly be rejected - not because it is necessarily worse, but 
because it would represent a change of style only.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From tleeuwenburg at gmail.com  Thu Aug 30 15:34:16 2007
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: Thu, 30 Aug 2007 19:34:16 -0000
Subject: Trouble using sys.settrace
In-Reply-To: <1188502289.484027.322520@z24g2000prh.googlegroups.com>
References: <1188502289.484027.322520@z24g2000prh.googlegroups.com>
Message-ID: <1188502456.936992.315800@e9g2000prf.googlegroups.com>

On Aug 31, 5:31 am, "tleeuwenb... at gmail.com" <tleeuwenb... at gmail.com>
wrote:
> The code below produces no output. I would expect to see:
>
> tracing...
> tracing...
> tracing...
> tracing...
> tracing...
>
> I was wondering if anyone had any experience with this.
Never mind, now it works.


>
> =================================
> import sys
>
> def mytrace(frame, event, arg):
>     print "tracing..."
>
> sys.settrace(mytrace)
>
> def foo():
>     for i in range(5):
>         print i
>
> foo()




From vedrandekovic at v-programs.com  Wed Aug  8 04:19:25 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Wed, 08 Aug 2007 01:19:25 -0700
Subject: setuptools
Message-ID: <1186561165.946173.54590@19g2000hsx.googlegroups.com>

Hello,

If anybody have experiences with setuptools, I was download
bbfreeze-0.95.2-py2.4-win32.egg and when I run installation with cmd:


$ easy_install bbfreeze-0.95.2-py2.4-win32.egg

Processing bbfreeze-0.95.2-py2.4-win32.egg
Removing c:\Python24\lib\site-packages\bbfreeze-0.95.2-py2.4-win32.egg
creating c:\Python24\lib\site-packages\bbfreeze-0.95.2-py2.4-win32.egg
Extracting bbfreeze-0.95.2-py2.4-win32.egg to c:\Python24\lib\site-
packages

Adding bbfreeze 0.95.2 to easy_install.pth file

Installed c:\Python24\lib\site-packages\bbfreeze-0.95.2-py2.4-
win32.egg
Processing dependencies for bbfreeze==0.95.2
error: None

If this installation is successfully then where is installed module?

Regards,
Vedran



From indu_shreenath at yahoo.co.in  Thu Aug  9 03:08:38 2007
From: indu_shreenath at yahoo.co.in (Indu Shreenath)
Date: Thu, 9 Aug 2007 08:08:38 +0100 (BST)
Subject: how to get command output using python
Message-ID: <915532.68360.qm@web8605.mail.in.yahoo.com>

Hey,
  I want to get the output of DIR /AD /B to a variable using python.
  How to do this?
  Thanks,
  Indu

       
---------------------------------
 Download prohibited? No problem. CHAT from any browser, without download.
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From __peter__ at web.de  Thu Aug  9 04:38:51 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 09 Aug 2007 10:38:51 +0200
Subject: Help with Dictionaries and Classes requested please.
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <f9ejqr$e9q$00$1@news.t-online.com>

special_dragonfly wrote:

> I'm new to this group, I've read through the subject of a lot of the group
> but can't find anything relevant. Perhaps my question is too basic but I'm
> still stuck.
> Classes and Dictionaries.
> If I have a dictionary, how do I instantiate many instances of a class per
> dictionary key? Either at run-time or dynamically.
> Can anyone help me please?

No, your question is too vague rather than too basic. 
What are you trying to do? Please give a concrete example and perhaps some
code that you already have.

Peter


From omari at smileystation.com  Thu Aug 23 12:27:39 2007
From: omari at smileystation.com (Omari Norman)
Date: Thu, 23 Aug 2007 12:27:39 -0400
Subject: optparse - required options
In-Reply-To: <46CA0814.6050200@jayloden.com>
References: <496954360708201251r137dfaedqe632361891eae343@mail.gmail.com>
	<46C9F7D1.9040506@jayloden.com>
	<496954360708201353v19ea266cr50f144d1d71d5912@mail.gmail.com>
	<46CA0814.6050200@jayloden.com>
Message-ID: <20070823162739.GA28165@cameron>

On Mon, Aug 20, 2007 at 05:31:00PM -0400, Jay Loden wrote:
> Robert Dailey wrote:
> > Well, I don't know what is wrong with people then. I don't see how
> > required arguments are of bad design. Some command-line applications are
> > built around performing tasks based on information received. Compilers,
> > for example. A compiler can't do much of anything unless you give it at
> > the very least a filename. So, a --file command would most definitely be
> > one required argument. Anyway, I'm not trying to start a debate on this
> > issue. I have my own implementation for required arguments at the
> > moment, I am just a little bit surprised that this module doesn't make
> > it convenient. It would definitely help on code duplication.
> > 
> > Thanks for your response.
> 

> I tend to agree...while "required option" may be an oxymoron in
> English, I can think of quite a few scripts I've written myself (in
> various languages) that needed at least some kind of user input to
> operate. At least the documentation points to some examples for
> helpful hints, example code is a lot better than nothing ;)

The idea with optparse is not that programs should not require certain
information on the command line; rather, the idea is that this
information should be positional arguments, not 'options'.

That is, to use the compiler example:

compiler file

is preferred if a file argument is necessary.

compiler --file file

is not preferred.


-- 
Due to some violent content, viewer discretion is advised.


From theokok2000 at gmail.com  Tue Aug 14 19:34:46 2007
From: theokok2000 at gmail.com (theokok2000 at gmail.com)
Date: Tue, 14 Aug 2007 23:34:46 -0000
Subject: ooh-yes
Message-ID: <1187134486.195058.77030@22g2000hsm.googlegroups.com>

http://Theologos.kokkonis.googlepages.com/


http://kokonis.aygoystinos.googlepages.com/



From ptmcg at austin.rr.com  Wed Aug 15 09:10:59 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 15 Aug 2007 06:10:59 -0700
Subject: Retry: Question about FutureWarning
In-Reply-To: <ubKdnTirKeU6xl_bnZ2dnUVZ_rzinZ2d@speakeasy.net>
References: <mailman.1994.1187142273.22759.python-list@python.org>
	<ubKdnTirKeU6xl_bnZ2dnUVZ_rzinZ2d@speakeasy.net>
Message-ID: <1187183459.675090.194800@w3g2000hsg.googlegroups.com>

On Aug 14, 8:49 pm, Erik Max Francis <m... at alcyone.com> wrote:
> Steven W. Orr wrote:
> > M1.py:268: FutureWarning: hex/oct constants > sys.maxint will
> > return positive values in Python 2.4 and up
> >    StartTime   = safe_dict_get ( dic, 'starttime', 0xFFFFFFFF )
>         ...
> > import warnings
> > warnings.filterwarnings('ignore', category=FutureWarning)
>
> > My question is this: Why can the warning not be shut off by putting the
> > two lines in M1 where the reference exists to 0xFFFFFFFF ?
>
> You really don't want to shut off the warning; it means just what it says:
>
> Python 2.3.5 (#1, Feb  8 2005, 23:36:23)
> [GCC 3.2.3] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> 0xffffffff
> <stdin>:1: FutureWarning: hex/oct constants > sys.maxint will return
> positive values in Python 2.4 and up
> -1
>
> Python 2.4.3 (#1, Mar 29 2006, 17:16:11)
> [GCC 3.2.3] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> 0xffffffff
> 4294967295L
>
> --
> Erik Max Francis && m... at alcyone.com &&http://www.alcyone.com/max/
>   San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
>    Black vinyl man with black plasticized imagination
>     -- Nik Kershaw

So if by '0xFFFFFFFF' you meant -1, then change this line to use -1.
Otherwise, if you really meant 4294967295L, leave it at 0xFFFFFFFF and
move on.

-- Paul



From arkanes at gmail.com  Wed Aug  1 12:31:53 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 1 Aug 2007 11:31:53 -0500
Subject: Awkward format string
In-Reply-To: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
References: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
Message-ID: <4866bea60708010931x438e2e76p2a3d2e83f20e9689@mail.gmail.com>

On 8/1/07, beginner <zyzhu2000 at gmail.com> wrote:
> Hi,
>
> In order to print out the contents of a list, sometimes I have to use
> very awkward constructions. For example, I have to convert the
> datetime.datetime type to string first, construct a new list, and then
> send it to print. The following is an example.
>
>         x=(e[0].strftime("%Y-%m-%d"), e[1].strftime("%Y-%m-%d"))+e[2:]
>         print  >>f, "%s\t%s\t%d\t%f\t%f\t%f\t%d" % x
>
> e is a tuple. x is my new tuple.
>
> Does anyone know better ways of handling this?
>

You seem to be doing quite complicated things with your magical e
tuple. Do you have some specific aversion to classes?


From cai.haibin at gmail.com  Mon Aug  6 22:09:56 2007
From: cai.haibin at gmail.com (james_027)
Date: Tue, 07 Aug 2007 02:09:56 -0000
Subject: help with flexible decorators
Message-ID: <1186452596.052963.136840@e9g2000prf.googlegroups.com>

Hi,

I want to write a flexible decorators to edit a function that may have
1 or more arguments...

def enhance(func):
    def new(x):
        #do something ...
        return func(x)
    return new

@enhance
def method_a(x):
    #do something ...

While the enhance decorator work with functions of 1 argument, how do
I make it to work with more than one arguments.

Thanks
james



From redtiger84 at googlemail.com  Tue Aug  7 13:28:24 2007
From: redtiger84 at googlemail.com (Christoph Krammer)
Date: Tue, 07 Aug 2007 10:28:24 -0700
Subject: re.sub does not replace all occurences
Message-ID: <1186507704.440408.20630@57g2000hsv.googlegroups.com>

Hello everybody,

I wanted to use re.sub to strip all HTML tags out of a given string. I
learned that there are better ways to do this without the re module,
but I would like to know why my code is not working. I use the
following:

def stripHtml(source):
  source = re.sub("[\n\r\f]", " ", source)
  source = re.sub("<.*?>", "", source, re.S | re.I | re.M)
  source = re.sub("&(#[0-9]{1,3}|[a-z]{3,6});", "", source, re.I)
  return source

But the result still has some tags in it. When I call the second line
multiple times, all tags disappear, but since HTML tags cannot be
overlapping, I do not understand this behavior. There is even a
difference when I omit the re.I (IGNORECASE) option. Without this
option, some tags containing only capital letters (like </FONT>) were
kept in the string when doing one processing run but removed when
doing multiple runs.

Perhaps anyone can tell me why this regex is behaving like this.

Thanks and regards,
 Christoph



From bdesth.quelquechose at free.quelquepart.fr  Thu Aug 30 06:48:08 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 30 Aug 2007 12:48:08 +0200
Subject: Creating a multi-tier client/server application
In-Reply-To: <1188479584.073309.297770@x40g2000prg.googlegroups.com>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
	<7xy7ft4fqg.fsf@ruckus.brouhaha.com>
	<1188479584.073309.297770@x40g2000prg.googlegroups.com>
Message-ID: <46d73e73$0$10724$426a34cc@news.free.fr>

vanrpeterson at gmail.com a ?crit :
(snip)
> We have found the object-relationship managers

Actually, ORM stands for "object-relational mapper"

> to be bloated
> and unruly.  

Which ones ?


From steve at holdenweb.com  Wed Aug 29 06:49:02 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 29 Aug 2007 06:49:02 -0400
Subject: Gmane's been quiet ...
In-Reply-To: <1i3lsqu.10ti61g1fs47osN%raims@dot.com>
References: <mailman.88.1188343014.28954.python-list@python.org>	<1i3l2k9.1j3tdgr1iz19yeN%raims@dot.com>	<13d9l0f1i2erdc6@corp.supernews.com>
	<1i3lsqu.10ti61g1fs47osN%raims@dot.com>
Message-ID: <fb3iur$o05$1@sea.gmane.org>

Lawrence Oluyede wrote:
> Grant Edwards <grante at visi.com> wrote:
>> Posting that were made to mailing lists via gmane?
> 
> That, I do not know
> 
Given that I have now read a reply to my post-via-gmane on gmane before 
seeing the original post appear there I shall assume they've been having 
some sort of issue.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From python at lindin.eu  Tue Aug 28 06:37:08 2007
From: python at lindin.eu (Python list)
Date: Tue, 28 Aug 2007 12:37:08 +0200
Subject: Dead lock in pymat after using threading?
Message-ID: <5caec3a20708280337h6a230100ma7b14c4523770f5a@mail.gmail.com>

"Hi,

I'm having problems using the package pymat after using threading, e.g. the
line:

#
h = pymat.open()
#

is not possible to fully execute after the lines:

#
import threading
from time import sleep

def SlpFcn():
    sleep(5)
    print "end of sleep"

trd = threading.Thread(target=SlpFcn)
trd.start()
#

MATLAB is started as it should, but the python interpreter does not answer
and has to be shut
down using CTRL+ALT+DEL. After restarting the interpreter it is possible to
use pymat again
without problems (seems to be some kind of memory issue).

What differences between before and after threading are there, that could
cause these problems?
("del trd" or "gc.collect" after the threading, does not solve my problem.)
I'm using Python 2.2 in ControlDesk, Windows XP.

Thanks,
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From grante at visi.com  Fri Aug 24 16:55:23 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 24 Aug 2007 20:55:23 -0000
Subject: py2exe/distutils: how to include a tree of files?
Message-ID: <13cuhdr58m5one7@corp.supernews.com>

I'm packaging up a python program and need to include an entire
directory tree in the distribution. the data_files=[] option to
setup() is fine for individual files, but what do I do when I
need to include an entire directory tree?

On a more general note, I'm having trouble finding much
documentation on py2exe at all.  There's a wiki page at
py2exe.org, but it's pretty superficial.  It mentions looking
at the distutils documentation for details, but I've no idea
how distutils relates to py2exe or where in the distutils
documentation to look for py2exe stuff (I don't see anything
that looks familiar in the distutils docs).

There must be some py2exe documentation somewhere...

[http://sourceforge.net/projects/py2exe/ hasn't been updated in
5 years, is there any reason why it's still around?]

-- 
Grant Edwards                   grante             Yow! LBJ, LBJ, how many
                                  at               JOKES did you tell today??!
                               visi.com            


From bscrivener42 at gmail.com  Wed Aug 15 12:01:56 2007
From: bscrivener42 at gmail.com (BartlebyScrivener)
Date: Wed, 15 Aug 2007 16:01:56 -0000
Subject: Simple python iteration question
In-Reply-To: <mailman.1974.1187110840.22759.python-list@python.org>
References: <bFkwi.675$Oo.563@newssvr17.news.prodigy.net>
	<20070814163430.GJ22017@lass.lfod.us>
	<mailman.1974.1187110840.22759.python-list@python.org>
Message-ID: <1187193716.041459.232490@e9g2000prf.googlegroups.com>

On Aug 14, 11:59 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:

> Just for my own sanity: Isn't this the third response advocating the
> use of enumerate()? Did the other responses not get through, or was
> this a time-delay thing?
>
> Thanks,
> Shawn

Look at the timestamps.  All within ten minutes. And those ten minutes
are spent keyboarding your response in and posting, plus it takes
several minutes for the posts to appear on Google Groups.

rd




From bronger at physik.rwth-aachen.de  Sun Aug 26 18:47:19 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Mon, 27 Aug 2007 00:47:19 +0200
Subject: my parser.py isn't imported
References: <874pimqpei.fsf@wilson.homeunix.com>
	<1188166462.066732.123620@i13g2000prf.googlegroups.com>
Message-ID: <87ps19q5fs.fsf@wilson.homeunix.com>

Hall?chen!

John Machin writes:

> On Aug 27, 1:36 am, Torsten Bronger <bron... at physik.rwth-aachen.de>
> wrote:
>
>> I have a module parser.py in the same directory as the main
>> module.  In the main module, I import "parser".  On Linux, this
>> works as expected, however on Windows, it imports the stdlib
>> parser module.  sys.path[0] points to the directory of my
>> parser.py in both cases.  What went wrong here?
>
> Ask a literal question, get a literal answer :-)
>
> 1. Failure to consider that problems can happen [and therefore
> will happen [1]] when there are multiple entities with the same
> name.

So I'd like to know a means to tell *explicitly* what I want to
import.  Maybe I could use the imp module but that's ugly.  I mean,
there are hundreds of modules on my harddisk, so trying to avoid
nameclashs should not be the solution, and given ...

> 2. Failure to RTFabulousM:
> """
> Details of the module searching and loading process are
> implementation and platform specific. It generally involves
> searching for a ``built- in'' module with the given name and then
> searching a list of locations given as sys.path.
> """

... the whole systems seems largely arbitrary, which I don't
believe.  ;-)

"parser" is built-in on Windows but not on Linux.  What's the list
of modules that *may* be built-in on some platform or
implementation?  Or should I avoid the whole standard lib for names
of my modules?  Or even everything which is shipped e.g. with
Enthought Python?  I find this quite irritating.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From carsten at uniqsys.com  Fri Aug 31 14:39:51 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 31 Aug 2007 14:39:51 -0400
Subject: So what exactly is a complex number?
In-Reply-To: <eb79828c0708311013j3fadb9ejda3c63ca6e8d7165@mail.gmail.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<1188576174.3479.9.camel@dot.uniqsys.com>
	<mailman.215.1188576767.28954.python-list@python.org>
	<1188579019.141544.292210@50g2000hsm.googlegroups.com>
	<eb79828c0708311013j3fadb9ejda3c63ca6e8d7165@mail.gmail.com>
Message-ID: <1188585591.3479.34.camel@dot.uniqsys.com>

On Fri, 2007-08-31 at 11:13 -0600, Lamonte Harris wrote:
> >Is English your native language? I'm having a hard time decoding your
> question.
> dont be an ass....

I'm sorry you took it this way. I was only trying to help. It won't
happen again.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From larry.bates at websafe.com  Thu Aug  2 10:05:35 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 02 Aug 2007 09:05:35 -0500
Subject: Directory
In-Reply-To: <1185831827.206641.163630@x40g2000prg.googlegroups.com>
References: <1185831827.206641.163630@x40g2000prg.googlegroups.com>
Message-ID: <46B1E4AF.909@websafe.com>

Rohan wrote:
> I would like to get a list of sub directories in a directory.
> If I use os.listdir i get a list of directories and files in that .
> i only want the list of directories in a directory and not the files
> in it.
> anyone has an idea regarding this.
> 

import os
listofdirs=[d for d in os.listdir(mydir) if os.pathisdir(d)]

-Larry


From gtcopeland at gmail.com  Tue Aug 21 15:51:11 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: Tue, 21 Aug 2007 12:51:11 -0700
Subject: Problem with Thread.join()
In-Reply-To: <mailman.29.1187626375.26576.python-list@python.org>
References: <496954360708131610i62c0a63aneb7c39d23a052ac0@mail.gmail.com>
	<op.txcl3yoox6zn5v@a98gizw.cpe.telecentro.net.ar>
	<8a6b8e350708200758w640fd7c4w5bd19fb53decde71@mail.gmail.com>
	<mailman.29.1187626375.26576.python-list@python.org>
Message-ID: <1187725871.271309.64830@22g2000hsm.googlegroups.com>

On Aug 20, 11:12 am, "Robert Dailey" <rcdai... at gmail.com> wrote:
> Hey guys,
>
> Sorry for taking so long to respond. I had actually figured out what
> this issue is over on the wxPython mailing list. The issue was that I
> was attempting to configure wxPython controls from a remote thread,
> which is apparently illegal due to some state persistance issues.
>

As a rule of thumb, only one thread *ever* controls the GUI.

Greg



From bignose+hates-spam at benfinney.id.au  Tue Aug 28 19:22:02 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 29 Aug 2007 09:22:02 +1000
Subject: Check for dict key existence, and modify it in one step.
References: <1188311810.226363.295500@w3g2000hsg.googlegroups.com>
	<87bqcrfeku.fsf@benfinney.id.au>
Message-ID: <877inffdnp.fsf@benfinney.id.au>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

>     foo.setdefault(whatever, {})
>     foo[whatever].setdefault(someother, 0)
>     foo[whatever] += delta

Should, of course, be:

    foo.setdefault(whatever, {})
    foo[whatever].setdefault(someother, 0)
    foo[whatever][someother] += delta

-- 
 \        "My house is made out of balsa wood, so when I want to scare |
  `\     the neighborhood kids I lift it over my head and tell them to |
_o__)  get out of my yard or I'll throw it at them."  -- Steven Wright |
Ben Finney


From daniels at dsl-only.net  Sat Aug 25 06:20:09 2007
From: daniels at dsl-only.net (Scott David Daniels)
Date: Sat, 25 Aug 2007 03:20:09 -0700
Subject: beginner, idiomatic python
In-Reply-To: <13ct7v3qn2v5206@corp.supernews.com>
References: <13cqlqbbpn0dmea@corp.supernews.com><1187898049.734696.9500@l22g2000prc.googlegroups.com><13csi2tn49esmc3@corp.supernews.com>
	<mailman.230.1187928865.32294.python-list@python.org>
	<13csqk47j0c56b0@corp.supernews.com>
	<CqSdnRl2x8928FPbnZ2dnUVZ_jSdnZ2d@speakeasy.net>
	<13ct7v3qn2v5206@corp.supernews.com>
Message-ID: <13d00hu2mflt01b@corp.supernews.com>

bambam wrote:
>> The reason that lists don't have set-like methods is because
>> lists aren't sets -- lists can contain duplicate elements
and they are ordered.  I'd have used sets if I was sure you
meant [1,2,3] to mean the same thing as [3,1,2] and no duplicates.

> Interesting point -- if that's all there is in it, then lists should
> have difference and intersection methods. Not because they
> are the same as sets -- because they are slightly different than
> sets. In this case it doesn't matter - my lists don't contain
> duplicate elements this time - but I have worked with lists in
> money market and in inventory, and finding the intersection
> and difference for matching off and netting out are standard
> operations.
Here you seem to be talking about multisets (also called bags).
They have more fully defined algebraic properties analogous to sets.

bag([1,2,3,3,4]) == bag([3,1,2,4,3]) != bag([1,2,3,4])
bag([1,2,2,3]) - bag([1,2]) == bag([2,3])
bag([1,2,3]) - bag([3,4]) == bag([1])

>>> Excellent. By symmetry, I see that "list" casts the set back into a list.
Some will say 'sorted' is a better conversion of a set to list, since
the result is well-defined.

--Scott David Daniels
Scott.Daniels at Acm.Org


From ldo at geek-central.gen.new_zealand  Tue Aug 28 01:05:01 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Tue, 28 Aug 2007 17:05:01 +1200
Subject: "Try:" which only encompasses head of compound statement
References: <1188250535.607963.42540@22g2000hsm.googlegroups.com>
	<1188256903.075011.173820@k79g2000hse.googlegroups.com>
Message-ID: <fb0a99$hgr$2@lust.ihug.co.nz>

In message <1188256903.075011.173820 at k79g2000hse.googlegroups.com>, Carl
Banks wrote:

> Consider this: is there any other code in your program that has to do
> something different based on whether you successfully opened this file
> or not?  If so, how will you notify it whether the call has succeeded
> or not?  Very often, the caller itself needs to know.  You could, say,
> set a flag to indicate it's failed, but why do that when you could
> simply let the caller detect and handle the error itself?

I am generally wary of exceptions, and like to contain them as much as
possible. So my answer to your point is something like

    try :
        f = open(TheFile, "r")
    except IOError, (ErrNo, Msg) :
        if ErrNo != errno.ENOENT :
            raise
        #end if
        f = None
    #end try

(Note how I check for the specific error code I want to handle.) Then later
on I can determine if the file was successfully opened by

    if f != None :
        ... further processing on f ...
    #end if



From zyzhu2000 at gmail.com  Thu Aug 16 23:16:32 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Fri, 17 Aug 2007 03:16:32 -0000
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
Message-ID: <1187320592.942822.318630@z24g2000prh.googlegroups.com>

On Aug 16, 5:35 pm, beginner <zyzhu2... at gmail.com> wrote:
> Hi All.
>
> I'd like to do the following in more succint code:
>
> if k in b:
>     a=b[k]
> else:
>     a={}
>     b[k]=a
>
> a['A']=1
>
> In perl it is just one line: $a=$b->{"A"} ||={}.
>
> Thanks,
> Geoffrey

It looks like defaultdict is the solution for this kind of thing.
Thanks all for your help.



From laurent.pointal at limsi.fr  Thu Aug  2 03:09:49 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Thu, 02 Aug 2007 09:09:49 +0200
Subject: Equivalent to gzinflate() function in PHP.
In-Reply-To: <pan.2007.08.02.06.27.03.891918@artcom.pl>
References: <pan.2007.08.01.13.44.47.273887@artcom.pl>
	<1185976461.491418.20230@i38g2000prf.googlegroups.com>
	<pan.2007.08.02.06.17.09.653367@artcom.pl>
	<pan.2007.08.02.06.27.03.891918@artcom.pl>
Message-ID: <f8rvvt$rjd$1@news2.u-psud.fr>

Adam Kubica a ?crit :
> After some king of brain fucked tries, I found:
> 
> zlib.decompress( data ) #equivalent gzdecompress()
> zlib.decompress( data, -zlib.MAX_WBITS ) #equivalent gzdeflate()

Note: you can also use encode() and decode() methods on the string 
containing your data, specifying 'zip' as encoding.

Example:

 >>> s="Hello"*100
 >>> s1 = s.encode('zip')
 >>> len(s1)
18
 >>> s1
'x\x9c\xf3H\xcd\xc9\xc9\xf7\x18%F\x12\x01\x00\t\xb9\xc3Q'
 >>> s2 = s1.decode('zip')
 >>> len(s2)
500
 >>> s2
'HelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHell
oHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHell
oHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHell
oHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHell
oHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHell
oHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHell
oHelloHelloHelloHello'
 >>>


IMHO this is mode understandable than zlib.decompress( data, 
-zlib.MAX_WBITS ).

A+

Laurent.

PS. There may be other compression encodings... look at 
encodings.aliases.aliases, where I can see 'zip' and 'zlib' (same), but 
also 'bz2'. - you can also found encoders for hexadecimal, quoted 
printable, and other formats.


From smbaker at gmail.com  Wed Aug 15 15:36:23 2007
From: smbaker at gmail.com (Scott)
Date: Wed, 15 Aug 2007 12:36:23 -0700
Subject: threads, mutual exclusion, and lists
Message-ID: <1187206583.255588.57920@e9g2000prf.googlegroups.com>

I have two threads that share a python list. One thread adds to the
list with append(), the other thread removes items with pop().

My question is -- are python list operations atomic? If they are not,
then I assume I need to put some mutual exclusion around the append()
and pop() calls ?

Thanks,
Scott



From aleax at mac.com  Thu Aug  2 11:45:13 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 2 Aug 2007 08:45:13 -0700
Subject: Pythonic way for missing dict keys
References: <mailman.938.1184958565.22759.python-list@python.org>
	<pan.2007.07.21.00.20.54.768439@REMOVE.THIS.cybersource.com.au>
	<mailman.954.1184989959.22759.python-list@python.org>
	<Xns99748CC2DB4AAduncanbooth@127.0.0.1>
	<1185041243.323915.161230@x40g2000prg.googlegroups.com>
	<mailman.984.1185101740.22759.python-list@python.org>
	<87lkd0eprj.fsf@pobox.com>
	<mailman.1279.1185623588.22759.python-list@python.org>
	<pan.2007.07.29.04.10.19.329342@REMOVE.THIS.cybersource.com.au>
	<46b0ed0b$0$2257$426a74cc@news.free.fr>
	<mailman.1493.1186042809.22759.python-list@python.org>
	<46b1b0ba$0$25340$426a74cc@news.free.fr>
Message-ID: <1i27mku.1sc8l3x1dda3crN%aleax@mac.com>

Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com>
wrote:

> Alex Popescu a ?crit :
> > Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote in
> > news:46b0ed0b$0$2257$426a74cc at news.free.fr: 
> (snip)
> >> if hasattr(obj, '__call__'):
> >>    # it's a callable
> >>
> >> but I don't find it so Pythonic to have to check for a __magic__
> >> method. 
> > 
> > It looks like Python devs have decided it is Pythonic, because it is
> > already in the PEP. 
> 
> I do know, and I disagree with this decision.
> 
> FWIW, repr(obj) is mostly syntactic sugar for obj.__repr__(), 
> getattr(obj, name) for obj.__getattr__(name), type(obj) for 
> obj.__class__  etc... IOW, we do have a lot of builtin functions that
> mostly encapsulate calls to __magic__ methods, and I definitively don't
> understand why this specific one (=> callable(obj)) should disappear. I

Maybe because it DOESN'T "encapsulate a call" to a magic method, but
rather the mere check for the presence of one?

> usually have lot of respect for Guido's talent as a language designer
> (obviously since Python is still MFL), but I have to say I find this 
> particular decision just plain stupid. Sorry.

The mere check of whether an object possesses some important special
method is best accomplished through the abstract-base-classes machinery
(new in Python 3.0: see <http://www.python.org/dev/peps/pep-3119/>).  At
this time there is no Callable ABC, but you're welcome to argue for it
on the python-3000 mailing list (please do check the archives and/or
check privately with the PEP owner first to avoid duplication).


Alex
 


From SMERSH009X at gmail.com  Fri Aug  3 23:18:43 2007
From: SMERSH009X at gmail.com (SMERSH009)
Date: Sat, 04 Aug 2007 03:18:43 -0000
Subject: Website data-mining.
In-Reply-To: <mailman.1603.1186196436.22759.python-list@python.org>
References: <mailman.1603.1186196436.22759.python-list@python.org>
Message-ID: <1186197523.939667.262620@e16g2000pri.googlegroups.com>

On Aug 3, 7:50 pm, Coogan <pcb2... at columbia.edu> wrote:
> Hi--
>
> I'm using Python for the first time to make a plug-in for Firefox.
> The goal of this plug-in is to take the source code from a website
> and use the metadata and body text for different kinds of analysis.
> My question is: How can I retrieve data from a website? I'm not even
> sure if this is possible through Python. Any help?
>
> nieu

How about this? it will fetch the HTML source of the page.

import datetime, time, re, os, sys, traceback, smtplib, string,\
urllib2, urllib, inspect
from urllib2 import build_opener, HTTPCookieProcessor, Request
opener = build_opener(HTTPCookieProcessor)
from urllib import urlencode

def urlopen2(url, data=None, user_agent='urlopen2'):
    """Opens Our URLS """
    if hasattr(data, "__iter__"):
        data = urlencode(data)
        headers = {'User-Agent' : user_agent}
    return opener.open(Request(url, data, headers))

###TESTCASES START HERE###
def publishedNotes():
    page = urlopen2("http://www.yourURL.com", ())
    pageRead = page.read()
    print pageRead

if __name__ == '__main__':
    publishedNotes()

    sys.exit()



From ldo at geek-central.gen.new_zealand  Fri Aug 31 22:13:30 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 14:13:30 +1200
Subject: strings (dollar.cents) into floats
References: <mailman.140.1188483282.28954.python-list@python.org>
	<877incd20i.fsf@benfinney.id.au>
	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <fbahnl$jeh$1@lust.ihug.co.nz>

In message <46d75cf3$0$7698$9b4e6d93 at newsspool2.arcor-online.net>, Wildemar
Wildenburger wrote:

> But what use is there for floats, then? When is it OK to use
> them?

Floating-point numbers are useful when you have to deal with very large and
very small amounts at the same time. In using them, you must understand
something about how rounding errors work, e.g.

1) Addition of a lot of very precise quantities together will produce a
less-precise quantity:

    >>> x = 0.1
    >>> x
    0.10000000000000001
    >>> for i in range(0, 1000000) : x += 0.1
    ...
    >>> x
    100000.10000133289

(Note the original quantity was precise to over 16 figures, the accumulated
total to less than 7.)

2) Subtraction of two nearly-equal quantities will also reduce precision:

    >>> 1.0 / 1000
    0.001
    >>> 1.0 / 1001
    0.000999000999000999
    >>> 1.0 / 1000 - 1.0 / 1001
    9.9900099900102068e-07

(Again, note the drop from about 15 figures of precision down to about 12.)

In terms of currency amounts, if you're only doing additions and
subtractions, then usual practice would be to work in integer cents/pence,
and format as dollars/euros/pounds/whatever and cents/pence only for
display and user input. That way you avoid the above rounding problems.

But if you're doing multiplications and divisions (e.g. currency
conversions, taxation, interest computations, futures, derivatives etc),
then it doesn't really matter. You're going to get rounding errors anyway,
and floating point will probably let you manage them better than integers
will.


From jeff_barish at earthlink.net  Fri Aug 31 11:18:34 2007
From: jeff_barish at earthlink.net (Jeffrey Barish)
Date: Fri, 31 Aug 2007 09:18:34 -0600
Subject: Biased random?
References: <favd0c$fcu$1@ss408.t-com.hr>	<mailman.80.1188332647.28954.python-list@python.org>
	<fb77bq$jtk$1@ss408.t-com.hr> <fb7a3d$phj$1@sea.gmane.org>
Message-ID: <fb9bg9$ibi$1@sea.gmane.org>

Robert Kern wrote:

> Ivan Voras wrote:
>> Jeffrey Barish wrote:
>> 
>>> If you take the difference between two uniformly distributed random
>>> variables, the probability density function forms an isosceles triangle
>>> centered at 0.  Take the absolute value of that variable and the pdf is
>>> a
>>> straight line with maximum value at 0 tapering to 0 at max.  Thus,
>>>
>>> z = abs(randint(0, max) - randint(0, max))
>>>
>>> ought to do the trick.
>> 
>> It's elegant :)
>> 
>> I've noticed something interesting in my test: the value 0 appears less
>> often than other values (which behave as they should).
> 
> The distribution of the difference (before the abs()) looks like this
> (max=4):
> 
>     #
>    ###
>   #####
>  #######
>  ---0+++
>  321 123
> 
> Taking the absolute value doubles up the non-zero masses, but there's no
> "negative 0" to add to the 0s stack.
> 
>   #
>   #
>  ###
>  ###
>  ####
>  ####
>  0123
> 
> The method does not work because of that.
> 
The math says that it works, so we must not be implementing it correctly.  I
suspect that our mistake is quantizing the random variable first and then
taking the difference and absolute value.  What result do you get when you
quantize once?  That is, obtain two random values (floats) with uniform
pdf.  Take the difference.  Abs. Round to int.  This way, everything in the
band from (-0.5, +0.5) goes to 0, and that's the highest part of the
triangle.
-- 
Jeffrey Barish



From jonas.esp at googlemail.com  Fri Aug 17 15:07:10 2007
From: jonas.esp at googlemail.com (Kless)
Date: Fri, 17 Aug 2007 19:07:10 -0000
Subject: Encryption and hashing
Message-ID: <1187377630.017794.36510@50g2000hsm.googlegroups.com>

Since that I'm working to let encrypt/hash data in the data base of my
projects I have been looking for libraries and/or wrappers. So I want
give my feedback about it.

In the first I found PyCrypto [1] but I see any problems:

* I think that isn't been maintained because the last modification of
its web was on 30 Sep 2006
* Since that has not been uploaded to SourceForge [2] we cann't know
when was released the last version
* There algorithms more secure and modern that it hasn't.

Then, I found 2 great C libraries that are being maintained and
updated with many algorithms. They're MCrypt [3] and MHash [4], and
both have released the last version on this year.

For who knows any of criptography I comment that you can use
algorithms as secure as Rijndael, Twofish, or Serpent with the CFB
cipher mode. And for hash you can use RIPEMD, SHA-2 or WHIRLPOOL.

And the best is that there are wrappers for Python [5] [6].
For if anybody is interested on playing with them:

In the first you need the headers. In Debian/Ubuntu:
$ sudo apt-cache install libmcrypt-dev libmhash-dev

$ wget http://labix.org/download/python-mcrypt/python-mcrypt-1.1.tar.gz
$ wget http://labix.org/download/python-mhash/python-mhash-1.4.tar.gz
$ tar xzf python-mcrypt*.tar.gz; tar xzf python-mhash*.tar.gz
$ cd python-mhash*; sudo python setup.py install; cd ..
$ cd python-mcrypt*; sudo python setup.py install; cd..


[1] http://www.amk.ca/python/code/crypto
[2] http://sourceforge.net/projects/pycrypto
[3] http://mcrypt.sourceforge.net/
[4] http://mhash.sourceforge.net/
[5] http://labix.org/python-mcrypt
[6] http://labix.org/python-mhash



From deets at nospam.web.de  Tue Aug 21 09:46:33 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 21 Aug 2007 15:46:33 +0200
Subject: Module level descriptors or properties
References: <1187700539.312552.89340@w3g2000hsg.googlegroups.com>
Message-ID: <5j08lpF3qjmggU2@mid.uni-berlin.de>

Floris Bruynooghe wrote:

> Hi
> 
> When in a new-style class you can easily transform attributes into
> descriptors using the property() builtin.  However there seems to be
> no way to achieve something similar on the module level, i.e. if
> there's a "version" attribute on the module, the only way to change
> that to some computation later is by using a getter from the start as
> your public API.  This seems ugly to me.
> 
> Does anyone know of a better way to handle this?

Not really. All you can do is proxy all the calls through an actual object,
most probably a singleton.

Diez


From bdesth.quelquechose at free.quelquepart.fr  Mon Aug  6 01:56:32 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 06 Aug 2007 07:56:32 +0200
Subject: Heterogeneous lists
In-Reply-To: <RPadnXFHmYYUIiXbnZ2dnUVZ_uKpnZ2d@comcast.com>
References: <RPadnXFHmYYUIiXbnZ2dnUVZ_uKpnZ2d@comcast.com>
Message-ID: <46b8cbdf$0$6956$426a74cc@news.free.fr>

Gordon Airporte a ?crit :
> This is one of those nice, permissive Python features but I was 
> wondering how often people actually use lists holding several different 
> types of objects.

Depends on the definition of 'type'. I often have instances of different 
- possibly unrelated - classes in a same list. Fact is that these 
instances usually share a common (implied) interface, but, well, 
sometimes they don't...

> It looks like whenever I need to group different objects I create a 
> class, if only so I can use more meaningful names than '[2]' for the items.

You may not know, but Python has a builtin dict (ie : hashtable) type. 
It's very handy when you just want to "group different objects" while 
still using meaningful names.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug 31 08:10:35 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 31 Aug 2007 14:10:35 +0200
Subject: Pylons, SQLAlchemy, too many connections problem.
In-Reply-To: <pan.2007.08.31.12.03.48.18688@artcom.pl>
References: <pan.2007.08.31.12.03.48.18688@artcom.pl>
Message-ID: <46d8052a$0$421$426a74cc@news.free.fr>

Adam Kubica a ?crit :
> Hello.
> 
> I have pylons 0.96 (SVN) and current SQLAlchemy (0.3.10), and I have bug
> that
> doesn't exist earlier.
> 
> My connection code:
> <code>
> import sqlalchemy.mods.threadlocal
> from sqlalchemy import DynamicMetaData, objectstore
> 
> metadata = DynamicMetaData( case_sensitive = False )
> 
> def db_connect( dsn ):
>     engine = create_engine( dsn, echo=False, echo_pool=False,
> encoding='latin2',  convert_unicode=True )
>     metadata.connect( engine )
> </code>
> 
> command "netstat -an|grep 5432|grep ESTABLISHED|wc -l" displays one
> more connection after each refresh of page until I have exceptions
> such as:
> 
> sqlalchemy.exceptions.DBAPIError: (Connection failed)
> (OperationalError) FATAL: sorry, too many clients already
> 
> What is wrong?
> 
I don't know for sure, but I guess you'd get better answers posting 
either on the Pylons or SQLAlchemy's google groups.


From marc.girod at gmail.com  Wed Aug  8 07:47:29 2007
From: marc.girod at gmail.com (Marc Girod)
Date: Wed, 08 Aug 2007 11:47:29 -0000
Subject: KeyError: ... updated type, in planet
Message-ID: <1186573649.525124.205890@22g2000hsm.googlegroups.com>

Hello,

I am using Planet 2.0 to generate RSS feeds from wiki pages.
On some of my wikis, I get an error such as:

ionawikis> sudo python2.5 /root/planet/planet.py -v ./tstconfig.ini
DEBUG:planet.runner:Socket timeout set to 20 seconds
INFO:planet.runner:Loading cached data
Traceback (most recent call last):
  File "/root/planet/planet.py", line 211, in <module>
    main()
  File "/root/planet/planet.py", line 195, in main
    my_planet.run(planet_name, planet_link, template_files, offline)
  File "/root/planet/planet/__init__.py", line 300, in run
    channel = Channel(self, feed_url)
  File "/root/planet/planet/__init__.py", line 588, in __init__
    self.cache_read_entries()
  File "/root/planet/planet/__init__.py", line 638, in
cache_read_entries
    item = NewsItem(self, key)
  File "/root/planet/planet/__init__.py", line 933, in __init__
    self.cache_read()
  File "/root/planet/planet/cache.py", line 74, in cache_read
    self._type[key] = self._cache[cache_key + " type"]
  File "/usr/lib/python2.5/bsddb/__init__.py", line 223, in
__getitem__
    return _DeadlockWrap(lambda: self.db[key])  # self.db[key]
  File "/usr/lib/python2.5/bsddb/dbutils.py", line 62, in DeadlockWrap
    return function(*_args, **_kwargs)
  File "/usr/lib/python2.5/bsddb/__init__.py", line 223, in <lambda>
    return _DeadlockWrap(lambda: self.db[key])  # self.db[key]
KeyError: 'http://wiki.iona.com/icde-wiki/MarcLog/
June2007#20070611094814 updated type'


I am not proficient in Python.
I understand that a certain key is missing in some dictionary,
but this is not sufficient for me to fix the problem.

Could somebody put me on the trail?

Thanks!
Marc



From tjreedy at udel.edu  Sun Aug 19 23:45:46 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 19 Aug 2007 23:45:46 -0400
Subject: Python question (PyNoob)
References: <3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d@bt.com>
Message-ID: <fab2qi$g83$1@sea.gmane.org>


"Anonymous" <no.reply at here.com> wrote in message 
news:3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d at bt.com...
|I have exp with C/C++ (and a few other langs). I want to use Python to
| start doing the ff:
|
| 1). Data Munging (text processing) - instead of Perl
| 2). Automating my build process
| 3). (Possibly) some web data retrieval jobs
|
| Can anyone point me to resurces/possibly scripts that can get me up to
| speed (to do these 3 things) ASAP, without having to learn the basics of
| programming?

Your first sentence suggests that you already know the basics of 
programming, so perhaps you meant something a bit different?  such as not 
figure out for yourself the basic idioms of Python, but learn them from 
code?

In any case, item 1 seems too broad for specific help.  As to item three, 
there are modules and indeed programs available.  Check PyPI on the Python 
site, or search this newsgroup's archives (groups.google.com) or the web 
generally.

tjr





From MartinWuitz at yahoo.de  Sun Aug 12 10:02:53 2007
From: MartinWuitz at yahoo.de (MartinWuitz at yahoo.de)
Date: Sun, 12 Aug 2007 14:02:53 -0000
Subject: Bill Gates try to sell Microsoft @ ebay look here
Message-ID: <1186927373.694975.244710@57g2000hsv.googlegroups.com>

http://www.pennergame.de/ref.php?uid=4762

http://www.pennergame.de/ref.php?uid=5572



From rcdailey at gmail.com  Sun Aug 12 11:03:11 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Sun, 12 Aug 2007 10:03:11 -0500
Subject: I am giving up perl because of assholes on clpm -- switching to
	Python
In-Reply-To: <15e66e4e0708111526u541bccacoc834a1e51815f233@mail.gmail.com>
References: <0Y2dnTFHdYnENTrbnZ2dnUVZ_vrinZ2d@giganews.com>
	<Lc1186058698244350x8ae3b4c@earth.podro.com>
	<496954360708111500k6764d019p7cbf74b1df399b94@mail.gmail.com>
	<15e66e4e0708111526u541bccacoc834a1e51815f233@mail.gmail.com>
Message-ID: <496954360708120803y45220af3pde442d841358c5dd@mail.gmail.com>

That's a bit hard given the unpredictability of each person on that list.
What seems like a simple question one minute suddenly turns into a flamewar
because someone had a bad day at work and needed to vent at my expense. This
is beyond phrasing your questions properly. It has to do with just pure
stupidity.

On 8/11/07, Greg Donald <gdonald at gmail.com> wrote:
>
> On 8/11/07, Robert Dailey <rcdailey at gmail.com> wrote:
> > I had this very same problem with the doxygen mailing list... doxygen is
> > such a great tool but full of assholes in their mailing list.
>
> I'm not defending any assholes you may have ran into, but I find the
> thing to do is only ask questions in such a way that no one can
> possibly have a reason to be an asshole.
>
> http://catb.org/~esr/faqs/smart-questions.html
>
>
> --
> Greg Donald
> http://destiney.com/
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From aleax at mac.com  Wed Aug  1 11:04:57 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 1 Aug 2007 08:04:57 -0700
Subject: Where do they tech Python officialy ?
References: <1185209574.045112.163780@g4g2000hsf.googlegroups.com>
	<7xveca4ajp.fsf@ruckus.brouhaha.com>
	<1185265091.276958.239910@r34g2000hsd.googlegroups.com>
	<1i23wyk.avc945i4dwsiN%aleax@mac.com>
	<mailman.1423.1185957645.22759.python-list@python.org>
Message-ID: <1i25pjo.1mo5uqc1yxqsjkN%aleax@mac.com>

Alex Popescu <nospam.themindstorm at gmail.com> wrote:
   ...
> > and you will both learn a lot _and_ acquire "professional experience"
> > that any enlightened employer will recognize as such.  
> 
> It depends :-). In my experience I met employers being concerned by my
> implication in the oss world :-).

Considering that even the King of Proprietary Software, Microsoft, now
happily hires major Open Source figures such as Jim Hugunin (MS was also
a top-tier sponsor at the recent OSCON, with both managerial and senior
technical employees giving keynotes and tech talks), it boggles the mind
to think about which kind of company would instead be "concerned" by a
candidate's OS experience.


> > That will take a
> > while, but not as long as getting a college degree (and it will be far
> > cheaper than the degree).
> 
> I don't know much about the open community in Python world, but in Java
> world becoming a project member may be more difficult than getting a 
> degree (or close to :-)) ).

In a major project, you will of course have to supply useful
contributions as well as proving to have a reasonable personality &c
before being granted committer privileges; and a few projects (centered
on a group of committers employed by a single firm or on an otherwise
close-knit small clique) are not very open to the outside world at all.
But (at least wrt projects using Python, C, C++ -- I have no experience
of opensource projects focused on Java instead) that is the exception,
not the rule.


Alex


From faulkner891 at gmail.com  Wed Aug  8 23:23:26 2007
From: faulkner891 at gmail.com (faulkner)
Date: Wed, 08 Aug 2007 20:23:26 -0700
Subject: How can I programmatically find the name of a method from within
	that method?
In-Reply-To: <1186627400.727353.317750@d55g2000hsg.googlegroups.com>
References: <1186548312.672360.259100@q3g2000prf.googlegroups.com>
	<1186627400.727353.317750@d55g2000hsg.googlegroups.com>
Message-ID: <1186629806.424178.119810@19g2000hsx.googlegroups.com>

On Aug 8, 10:43 pm, faulkner <faulkner... at gmail.com> wrote:
> On Aug 8, 12:45 am, kj7ny <kj... at nakore.com> wrote:
>
> > Is there a way that I can programmatically find the name of a method I
> > have created from within that method?  I would like to be able to log
> > a message from within that method (def) and I would like to include
> > the name of the method from which it was written without having to
> > hard-code that value in every message string.  While we're at it, is
> > there a way to programmatically get the name of the class and the
> > module while I'm at it?
>
> > Thanks,
>
> def foo():
>     print sys._getframe(0).f_code.co_name
>
> most of the darkest magic of python is in the frames returned by
> sys._getframe.

sorry for the double-post. i forgot to answer the rest of the
question.

class a:
    def b(self, *a):
        print sys._getframe(0).f_code.co_name
        print self.__class__.__name__
        print getattr(self,
sys._getframe(0).f_code.co_name).im_class.__name__
        print self.__class__.__module__

def log(f):
    def newf(*a, **kw):
        if a and f.func_code.co_varnames[0] == 'self': print '%s.%s.%s
%r %r' % (a[0].__class__.__module__, a[0].__class__.__name__,
f.func_name, a, kw)
        else: print '%s.%s %r %r' % (f.func_globals['__name__'],
f.func_name, a, kw)
        f(*a, **kw)
    newf.__name__ = f.__name__
    newf.__doc__ = f.__doc__
    return newf

you can find more interesting attributes of frame and function objects
using the builtin dir function.



From __peter__ at web.de  Mon Aug 27 13:17:16 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 27 Aug 2007 19:17:16 +0200
Subject: sorting a list of lists
References: <1188233798.684136.263640@22g2000hsm.googlegroups.com>
Message-ID: <fav0us$r05$00$1@news.t-online.com>

 nicksavill at googlemail.com wrote:

> i would like to sort a list of lists. The list is first sorted on the
> second item in the sub-lists (which I can do), then on the third item
> (which I can't).
> 
> eg. records = [['dog',1,2], ['chair',2,1], ['cat',1,3], ['horse',3,4],
> ['table',3,2], ['window',3,5]]
> 
> I want sorted to [['dog',1,2], ['cat',1,3], ['chair',2,1], ['table',
> 3,2], ['horse',3,4], ['window',3,5]]
> 
> To sort on the second item in the sub-lists I do the following
> 
> pass1 = itemgetter(1)
> sorted(records, key=pass1)
> 
> How can I then sort on the third item in the sub-lists whilst keeping
> the order on the second item?

list.sort() is stable, so

items = sorted(records, key=itemgetter(2)) # minor order first
items.sort(key=itemgetter(1)) # major order

should give the desired result (items with equal item[1] are sorted by
item[2]. Python 2.5 also allows to pass multiple indices to itemgetter()

sorted(records, key=itemgetter(1, 2))

IIRC for Python 2.4 you'd have to write your own key routine:

def key(item):
    return item[1], item[2]
sorted(records, key=key)

Peter


From aahz at pythoncraft.com  Thu Aug 23 16:49:47 2007
From: aahz at pythoncraft.com (Aahz)
Date: 23 Aug 2007 13:49:47 -0700
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
Message-ID: <fakrtb$2ts$1@panix3.panix.com>

In article <87odgyyx9u.fsf at wilson.homeunix.com>,
Torsten Bronger  <bronger at physik.rwth-aachen.de> wrote:
>
>Some LaTeX users in Aachen thought about a general-use markup
>language this spring.  I wrote some code and a rough project
>description, however, we could need some help.

http://docutils.sourceforge.net/
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From bayesianlogic at acm.org  Fri Aug  3 16:57:35 2007
From: bayesianlogic at acm.org (ekzept)
Date: Fri, 03 Aug 2007 13:57:35 -0700
Subject: libpq.dll for pgdb
Message-ID: <1186174655.398009.117540@57g2000hsv.googlegroups.com>

the module PGDB which gives Python access to PostgreSql currently
wants for a copy of a properly located or proper libpq.dll library, on
Windows.

anyone know what the current story on this is?

thanks,

 -- jt



From vbr at email.cz  Thu Aug  2 07:34:08 2007
From: vbr at email.cz (vbr at email.cz)
Date: Thu, 02 Aug 2007 13:34:08 +0200 (CEST)
Subject: =?us-ascii?Q?Re=3A=20Use=20variable=20in=20regular=20expression?=
In-Reply-To: <1186051401.122847.114690@d55g2000hsg.googlegroups.com>
Message-ID: <15924.18753-5774-380836898-1186054448@email.cz>

...
> Yesterday's date is 20070731, and assigned to the variable
> "yesterday_date". I want to loop thru a directory and find all of the
> yesterday's data ONLY IF the feature class has the date at the
> BEGINNING of the filename.
...
> I can't figure out the
> syntax of inserting the "^" into the regex. 
> 
...
e.g.

yesterdayRE = re.compile("^"+yesterday_date)
...
should work (assuming yesterday_date is a string), but for that simple tests you may also try e.g.

filename.startswith(yesterday_date)

(with both filename and yesterday_date being strings).

Greetings,
   Vlasta



From zyzhu2000 at gmail.com  Thu Aug 16 18:52:18 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Thu, 16 Aug 2007 22:52:18 -0000
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1i2ysn4.7ue1uud53iygN%raims@dot.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<1i2ysn4.7ue1uud53iygN%raims@dot.com>
Message-ID: <1187304738.181728.13820@q3g2000prf.googlegroups.com>

On Aug 16, 5:43 pm, ra... at dot.com (Lawrence Oluyede) wrote:
> beginner <zyzhu2... at gmail.com> wrote:
> > I'd like to do the following in more succint code:
>
> > if k in b:
> >     a=b[k]
> > else:
> >     a={}
> >     b[k]=a
>
> b.setdefault(k, a)
>
> --
> Lawrence, oluyede.org - neropercaso.it
> "It is difficult to get a man to understand
> something when his salary depends on not
> understanding it" - Upton Sinclair

I am afraid it is not the same. b.setdefault(k, {}) will always create
an empty dict, even if k is in b, as demonstrated in the below code.

b={}
def f(i):
    print "I am evaluated %d" % i
    return i

b.setdefault('A', f(1))
b.setdefault('A', f(2))
b




From jstroud at mbi.ucla.edu  Mon Aug 20 00:42:19 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 19 Aug 2007 21:42:19 -0700
Subject: popen4 not returning output
In-Reply-To: <lJ8yi.6118$924.1308@newssvr23.news.prodigy.net>
References: <1187582318.054450.76960@z24g2000prh.googlegroups.com>
	<lJ8yi.6118$924.1308@newssvr23.news.prodigy.net>
Message-ID: <jT8yi.6121$924.3194@newssvr23.news.prodigy.net>

James Stroud wrote:
> hortitude at gmail.com wrote:
>> I am trying to run the following script:
>>
>>
>> #!/usr/bin/python
>>
>> import popen2
>>
>> commandToRun = """scp scp_trial.py user at host:/targetDirectory"""
>> #commandToRun = "ls"
>> print commandToRun
>> p_out, p_in = popen2.popen4 (commandToRun)
>>
>> theOut = p_out.readlines ()
>> print theOut
>>
>>
>> When I run this command with the "ls" command I see the output.
>> When I run this with the scp command I do not see the output of my
>> command -- however the file is successfully transfered.  How can I see
>> the output?
>>
>> Thanks
>>
> 
> I'm not up on my scp, but look at popen3 and read from err.
> 
> James

Nevermind, I didn't notice that you were using popen4.


From hniksic at xemacs.org  Fri Aug 24 08:54:14 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Fri, 24 Aug 2007 14:54:14 +0200
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
Message-ID: <878x81rt3d.fsf@mulj.homelinux.net>

tooru honda <tooru_honda at fast-mail.org> writes:

> I have read the source code of the built-in random module,
> random.py.  After also reading Wiki article on Knuth Shuffle
> algorithm, I wonder if the shuffle method implemented in random.py
> produces results with modulo bias.

It doesn't have modulo bias because it doesn't use modulo to produce a
random index; it multiplies the floating point value with the desired
range.  I'm not sure if that method produces any measurable bias.


From deets at nospam.web.de  Fri Aug 17 12:08:27 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 17 Aug 2007 18:08:27 +0200
Subject: Can python threads take advantage of use dual core ?
In-Reply-To: <1187366443.621295.97020@e9g2000prf.googlegroups.com>
References: <1187366443.621295.97020@e9g2000prf.googlegroups.com>
Message-ID: <5ilvg4F3pqv6aU1@mid.uni-berlin.de>

nikhilketkar schrieb:
> What are the implications of the Global Interpreter Lock in Python ?
> Does this mean that Python threads cannot exploit a dual core
> processor and the only advantage of using threads is in that
> computation and IO-bound operations can continue in parallel ?


Essentially, yes. That is unless the computation is done in C-code which 
released the GIL beforehand. But a certain tradeoff is to expected 
nontheless.

Diez


From zzbbaadd at aol.com  Thu Aug 30 23:06:38 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Thu, 30 Aug 2007 20:06:38 -0700
Subject: list index()
In-Reply-To: <mailman.174.1188517712.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<87bqcod2gq.fsf@benfinney.id.au>
	<1188517370.998114.119940@q4g2000prc.googlegroups.com>
	<mailman.174.1188517712.28954.python-list@python.org>
Message-ID: <1188529598.134837.157530@x35g2000prf.googlegroups.com>

On Aug 30, 4:48 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/30/07, zzbba... at aol.com <zzbba... at aol.com> wrote:
>
>
>
> > On Aug 30, 4:31 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> > > zzbba... at aol.com writes:
> > > > In my case of have done os.listdir() on two directories. I want to see
> > > > what files are in directory A that are not in directory B.
>
> > > You get that information unambiguously. It's an exceptional case,
> > > since there's no index to return, so it throws an exception.
>
> > > > I have used exceptions in other languages and only do so on logic
> > > > that should never happen.
>
> > > You're confusing "assert" ("this should always be true") with
> > > "exception" ("this is an exception to the the normal flow of this
> > > process").
>
> > > An exception isn't "something that should never happen", it's
> > > something that is entirely possible and needs to be handled somehow.
>
> > I don't think that is the definition used across computer science.
>
> how its defined in Python is what is important in this context.

Is there a definition on python.org for an exception?

>
> > It suddenly dawned on me that what would be best would be a contains()
> > (or IN syntax for those who can't afford to wait) for lists.
>
> > if mylist.contains("hello):
>
> Genius. Why didn't anyone think of that before?

With an attitude like that Chris, don't expect to be getting an invite
to beta test my Python 3 fork.



From horpner at yahoo.com  Wed Aug 29 13:54:01 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 29 Aug 2007 17:54:01 GMT
Subject: general function for sorting a matrix
References: <1188402447.290663.307640@z24g2000prh.googlegroups.com>
Message-ID: <slrnfdbcbj.1cc.horpner@FIAD06.norwich.edu>

On 2007-08-29, Xah Lee <xah at xahlee.org> wrote:
> A couple years ago, i posted a programing problem, about
> writing a function that will sort a arbitrarily dimentioned
> matrix in any possible way to sort it.
>
> Such a function, is rather typical in functional programing
> languages.  I wrote a version in 1999 in perl for practical
> purposes, since sorting a matrix (i.e. list of lists) is rather
> common. With this function, i can have a single interface to
> deal with any list (including list of lists).
>
> It is ideal, that a language's function for sort actually are
> of this generality.
> (See ?What is Expressiveness in a Computer Language?, Xah Lee, 2005.
> http://xahlee.org/perl-python/what_is_expresiveness.html
> )
>
> The advantage of such a generality, is that a programer don't
> need to write a sorting code every time she encounters a list.

The advantage of such a richly implemented language as Python, is
that a programmer don't need to write a general sorting algorithm
at all.

-- 
Neil Cerutti


From oliver at obeattie.com  Mon Aug 20 07:13:08 2007
From: oliver at obeattie.com (oliver at obeattie.com)
Date: Mon, 20 Aug 2007 11:13:08 -0000
Subject: Sorting a list of Unicode strings?
In-Reply-To: <1187542237.139346.6910@o80g2000hse.googlegroups.com>
References: <1187542237.139346.6910@o80g2000hse.googlegroups.com>
Message-ID: <1187608388.772541.251860@22g2000hsm.googlegroups.com>

Thank you all for your very quick and informative replies. I was
basing this assumption that ? was classed as a standard 'A' from a
list of countries I was looking at (Wikipedia sorts it like this, too
- though this isn't what I was using http://en.wikipedia.org/wiki/List_of_countries#A)

I will leave it as it is, with ? at the bottom, if this is the correct
ordering.

Once again, thank you!

Oliver



From kyosohma at gmail.com  Sat Aug 11 09:39:02 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Sat, 11 Aug 2007 13:39:02 -0000
Subject: deselect an iterm in ListBox wxPython
In-Reply-To: <1186818810.685844.263700@w3g2000hsg.googlegroups.com>
References: <1186818810.685844.263700@w3g2000hsg.googlegroups.com>
Message-ID: <1186839542.246998.125430@g12g2000prg.googlegroups.com>

On Aug 11, 2:53 am, Bailu <lingyun.y... at gmail.com> wrote:
> Hi,
>
>    I am a newbie in wxPython and doing a program with ListBox,
> I want to select and deselect items in this box,
> I have use
>
> self.devlist = wx.ListBox(self, style=wx.LB_MULTIPLE)
> self.Bind(wx.EVT_LISTBOX, self.select_dev, self.devlist)
>
> to create this box, but don't know how to implement self.select_dev
> to find out which one is clicked
>
> deselect it, if it was selected  ( this is not working at default)
> select it, if it was not (toggle)
>
> The default behavior is, the selection is increasing, I can't deselect
> any of them.
>
> Thanks.
>
> Lingyun

You should look at the wxPython demo's code for the wx.ListBox. It
looks like they use the wx.EVT_LISTBOX event. See below:

<code>
# this writes to a multiline TextCtrl
self.log.WriteText('EvtListBox: %s, %s, %s, %s\n' %
                           (event.GetString(),
                            event.IsSelection(),
                            event.GetSelection(),
                            event.GetClientData()))
</code>

I'm not sure, but I think it uses the SetSelection() method to select
an item, which seems to deselect the previously selected item...at
least, that's how I interpret the demo.

The demo is here: http://wxpython.org/download.php

If you need additional help, try posting to the wxPython User's group:
http://wxpython.org/maillist.php

Regards,

Mike



From mail at microcorp.co.za  Wed Aug  8 03:20:55 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 8 Aug 2007 09:20:55 +0200
Subject: Heterogeneous lists
References: <RPadnXFHmYYUIiXbnZ2dnUVZ_uKpnZ2d@comcast.com>
Message-ID: <014001c7d992$b0f13980$03000080@hendrik>

"Gordon Airporte" <J,,,,r at fbi.gov>

> This is one of those nice, permissive Python features but I was 
> wondering how often people actually use lists holding several different 
> types of objects.

I do it all the time - I only use tuples when I _have_ to.

> It looks like whenever I need to group different objects I create a 
> class, if only so I can use more meaningful names than '[2]' for the items.

You don't have to be so array-minded.  You can write things like:

address = 2
individual_list[address]

this is easier to read and understand than:

individual_list[2]

and does the same thing.

I have found that the most useful data structure is a dict, 
or a dict of dicts. - almost an instant database.

- Hendrik





From http  Mon Aug  6 12:44:15 2007
From: http (Paul Rubin)
Date: 06 Aug 2007 09:44:15 -0700
Subject: Tkinter or wxpython?
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<mailman.1677.1186412323.22759.python-list@python.org>
	<7xlkcopu4r.fsf@ruckus.brouhaha.com>
	<mailman.1680.1186416061.22759.python-list@python.org>
Message-ID: <7x3aywr4tc.fsf@ruckus.brouhaha.com>

"Chris Mellon" <arkanes at gmail.com> writes:
> > Might or might not matter for the application, especially considering
> > that tkinter is part of the discussion.
> The point is that you have no option with the browser - even Tkinter
> has platform theming support now.

Hmm, I don't know anything about that.  I'm taking the view that for a
lot of apps, the requirement is to just put some functionality on the
screen, with slick visual appearance having little value or even
negative value.

> ...Gmail uses ajax instead of a page load when you start
> typing a reply, 

I see, the answer to what caused your problem is approximately "ajax
is evil", or alternatively, the gmail app attempts slickness with a
tool that doesn't support slickness that well.  OK, I can accept that
using browsers for slick interfaces has its problems, but the answer
(a lot of the time, not always) is to just decide you don't need
slickness.

> > File i/o and file system browsing are available from javascript if the
> > user grants permission.
> Which they won't (I don't even know how, from Firefox), so you can't
> rely on it working.

The application javascript pops a dialog asking for permission and the
user clicks yes or no.  If you can get them to install a desktop app
(gah!!) then you can certainly get them to click yes in a browser.
The permission mechanism is admittedly browser dependent.

> But not of anything else. I've often wanted to drag & drop a file onto
> the file upload box in gmail, for example.

Well, ok, that's a slick feature that your app might need.  None of
mine have needed it so far.

> How about something as simple as context menus?

Unnecessary slickness for many apps.  I've never needed it.

> > Multiple windows are evil most of the time,
> Multiple windows are the common case on the mac. They're not rare on
> other platforms as well. The fact that your windows are constrained to
> the browser and can't be torn off is a large limitation. No toolbars,
> no palettes, no modal dialogs (except on IE, or if  you constrain them
> to the browser). Lots of unnecessary chrome on your extra windows, too
> (see below).

You can get rid of the chrome with javascript, but the extra windows
are still usually evil and unnecessary.  Just because they get used a
lot doesn't change that.  A heck of a lot of deployed interfaces, web
or desktop, simply suck.

> > > More platforms to develop on and test with.
> > Compared to a desktop app?  I don't think so.
> Did you ever try counting? X browsers * Y browser versions * Z
> platforms. There are javascript and CSS bugs and differences between
> all of these. 

If you can tell them to install a desktop app, you can alternatively
tell them what browser to use.  For example we use a complicated
firefox-only browser app where I work, that relies heavily on canvas
objects.  But if you write your application with straightforward html
you tend to have very few platform problems.

> From my own professional experience, it's not any easier
> to account for browser differences than it is for platform
> differences. It's getting better as more people jump on the web
> bandwagon and CSS and JS abstraction libraries show up, 

I guess I see that stuff as mostly-evil and prefer straightforward
html.

> I'm not talking about chrome and slickness. I'm talking about basic
> usability concerns like "will this work with a higher font size" and
> "will it reflow in a sensible way if I change the window size". The
> CSS box model works okay for text, it's not so good for widgets. 

I just haven't had this problem with HTML interfaces.  I've never even
used CSS, though that makes me a bit of a lamer.  An interface that
needs to fill the whole screen with widgets is probably too
complicated.

> More than a few web apps end up writing their own layout engines in
> dynamic javascript. This is sad. While I'm talking about chrome, add
> "wasted screenspace due to browser chrome" to a limitation of web
> apps, again unless you write your own browser host. This is another
> example of a feature that makes a good browser (don't let arbitrary
> web pages mess with my web browser functionality) clashing with the
> desires of a good application (don't waste screen space with
> irrelevant functionality).

I guess the term I'd use to describe all these effects is "slick" and
a heck of a lot of the time it's just not needed.  Anyway you can pop
a chromeless browser window with a simple javascript call.

> Man, you should be in PR with the way you spin things. You can't
> implement anything except the most trivial of applications using only
> the simple, familiar web elements like HTML forms. Anything more
> complicated than that needs to be done with DHTML and probably AJAX,
> and those UI elements don't look anything like the familiar ones. You
> go in one breath from saying that you can implement dialogs in HTML to
> saying that the rich client is the *less* familiar of the interfaces?

I don't see the contradiction--with HTML you have just a few widgets
that everyone understands and you get an interface that's almost
always self-explanatory.  Yes you could call those interfaces trivial,
but the little secret that I'm trying to convey is that very often,
trivial is all that's needed.

> If you'd said "if you're making something really simple that has
> limited rich UI or data entry needs, consider a web application
> instead" I wouldn't have posted. A web application is something you
> make because the deployment and access benefits outweigh the UI and
> integration limitations, not as your default "go to" whenever you
> create an application.

Well, I could back off to somewhere between the two.  Like, "ask
yourself whether your application really needs a rich gui or complex
data entry features.  If you can get by with a simple HTML interface,
and a lot of the time you can, you'll probably have an easier time
doing it that way and that should be the default".

> I'd like an example you have of a desktop application that could have
> just as easily been a web application. Bonus points if it's not a CRUD
> screen, and double bonus if you don't just handwave away things like
> file browsing. Although there are benefits even for the crud screen -
> I've written screens and applications for data entry professionals and
> they almost always prefer the speed optimizations you can make in a
> client application.

I guess I've written 4 or 5 nontrivial desktop gui apps and ZERO of
them had file browsing.  One of them did need access to the pc's
serial port, which means there had to be application code on the
desktop, but the gui could have been a browser (talking to an
application-embedded http server) if browsers were available in those
days.  Another one of them saved some state to a local file but it did
that without file browsing, and could have instead saved the state on
a remote server if it were written as a remote app.

I'm not saying file browsing is never needed, just that from
experimental observation, it's quite often not needed.

Again, it all depends on what you're trying to do.  For data entry
stuff you probably want the data on a remote server anyway, and you
can do basic CRUD validation with fairly simple javascript.  Maybe
that departs from pure HTML but it's nothing like the ajax/dhtml
madness that causes the problems you've described.


From knomenet at gmail.com  Thu Aug 16 16:22:02 2007
From: knomenet at gmail.com (Michael Speer)
Date: Thu, 16 Aug 2007 16:22:02 -0400
Subject: Haskell lambdas in python
Message-ID: <314e9ce40708161322g482ed01fsc5f24a065110ea8@mail.gmail.com>

Hello python-list,

I decided to have some fun and altered a copy of python to use a
Haskell-like syntax for declaring lambdas.

>>> filter( \ x -> x == 3 or x > 8 , [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ,
10 ] )
[3, 9, 10]
>>> ( \-> "Hello World!" )()
'Hello World!'

While doing this I found something interesting while changing the grammar to
:

    old_lambdef: ( 'lambda' | '\\' ) [varargslist] ( ':' | '->' ) old_test
    ...
    lambdef: ( 'lambda' | '\\' ) [varargslist] ( ':' | '->' ) test


In Parser/tokenizer.c, instead of needing to change only the PyToken_OneChar
function to have a
        case '\\':      return LAMBDAARGS;
option, I also had to add
        case '\\':
                switch (c2) {
                case '\\':      return LAMBDAARGS;
                }
to PyToken_TwoChars.

The interactive runtime requires the OneChar definition, and the compilation
process ( specifically pgen ) requires the TwoChar definition.

If anyone wants the changes required to play around with it just email me
and I'll find somewhere to stick them on the web for download.

It seems a waste that whack acts only as an end of line continuance.

- Michael Speer
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From ocollioud at gmail.com  Fri Aug 24 07:16:30 2007
From: ocollioud at gmail.com (olive)
Date: Fri, 24 Aug 2007 11:16:30 -0000
Subject: Server-side scripting in python
In-Reply-To: <46ceb673$0$415$426a74cc@news.free.fr>
References: <1187614732.519547.296020@j4g2000prf.googlegroups.com>
	<gi6rp4-mes.ln1@lairds.us>
	<1187755436.972359.293360@i13g2000prf.googlegroups.com>
	<0k2up4-lla.ln1@lairds.us>
	<1187843960.922925.127990@i13g2000prf.googlegroups.com>
	<46ceb673$0$415$426a74cc@news.free.fr>
Message-ID: <1187954190.571860.85920@m37g2000prh.googlegroups.com>


> Yes : have a look at Pylons too. It's actually quite less 'polished'
> than Django, but it's IMHO going in the right direction (as a matter of
> fact, Turbogears 2.0 - another well-known Python MVC framework -  will
> be based on Pylons...). Django is clearly more oriented toward
> content-management, which might not be what you want for this project.

this opinion about Django is a little bit dated (see http://www.djangosites.org/
and http://code.djangoproject.com/wiki/DjangoPoweredSites).

Django is really multi-purpose and is rarely use as a CMS, excepted
through Ellington CMS which is itself a commercial fork oriented
toward newspaper like publishing.

I would use Plone instead as a general CMS.

Olive.



From hg at nospam.org  Tue Aug  7 21:37:50 2007
From: hg at nospam.org (hg)
Date: Tue, 07 Aug 2007 20:37:50 -0500
Subject: Emacs + python
References: <ak8x8v2udo.fsf@googlemail.com>
	<mailman.1476.1186017909.22759.python-list@python.org>
	<4vasi.139194$wG2.61677@newsfe17.lga>
	<mailman.1524.1186077010.22759.python-list@python.org>
	<JpGsi.28744$GO6.24370@newsfe21.lga>
	<87zm189lnq.fsf@benfinney.id.au>
Message-ID: <P79ui.45554$g86.40902@newsfe14.lga>

Ben Finney wrote:

> hg <hg at nospam.org> writes:
> 
>> how about a cscope equivalent ?
> 
> How about reading what was posted earlier in the thread, and give us a
> description of what you want instead of a name that people might not
> recognise?
> 
> --
>  \      "The judge asked, 'What do you plead?' I said, 'Insanity, your |
>   `\         honour. Who in their right mind would park in the passing |
> _o__)                                        lane?'"  -- Steven Wright |
> Ben Finney

Cscope allows for instance to find the definition of a symbol.

hg



From bignose+hates-spam at benfinney.id.au  Wed Aug  1 20:00:04 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 02 Aug 2007 10:00:04 +1000
Subject: Python end of file marker similar to perl's __END__
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
	<1185976656.753817.27980@x40g2000prg.googlegroups.com>
Message-ID: <874pjidcvv.fsf@benfinney.id.au>

beginner <zyzhu2000 at gmail.com> writes:

> Thanks everyone for responding. It doesn't look like python has
> it. I would definitely miss it. As Steve said, the nice thing about
> __END__ is that things below __END__ do not have to have legit
> syntax.

I think the unaddressed question is: Why is there so much code in your
module with invalid syntax that this trick would be useful?

> That let me focus on the lines of code I am debugging and do not
> have to worry about some bad syntax down the line. This feature is
> especially handy if I am, saying, replacing modoules or changing
> data structures.

I would strongly recommend you examine what part of your practice is
leading you to write so much code with invalid syntax, without
immediately testing and fixing it. Eliminate that part of the process
? possibly with test-driven development.

-- 
 \                "Holy unrefillable prescriptions, Batman!"  -- Robin |
  `\                                                                   |
_o__)                                                                  |
Ben Finney


From rafaelv at spress.com.br  Wed Aug  1 15:20:10 2007
From: rafaelv at spress.com.br (Rafael V.)
Date: Wed, 01 Aug 2007 16:20:10 -0300
Subject: Subprocess and pipe-fork-exec primitive
In-Reply-To: <46af9bcc$0$17509$9b622d9e@news.freenet.de>
References: <mailman.1332.1185806811.22759.python-list@python.org>
	<46af9bcc$0$17509$9b622d9e@news.freenet.de>
Message-ID: <46B0DCEA.6060409@spress.com.br>

Hi Martin,

   the operating system I'm using is SUSE Linux 10, kernel 2.6.13.

   You're right, I was missing something. After you told me that it
couldn't be Python preforming wait() on SIGCHLD, I decided to
investigate further.

   My application requires access to a Informix database, and uses
informixdb. The problem seems to be related to that module. I wrote a
small piece of code to test it:

---------------------------------------------------
#!/usr/bin/env python

from os import fork, execl, waitpid
from informixdb import connect

try:
   conf = {}
   conf['dsn'] = 'db at server'
   conf['user'] = 'user'
   conf['password'] = 'password'
   connection = connect(**conf)

except:
   pass

pid = fork()

if pid == 0:
   # Child
   execl("/bin/sh", "/bin/sh", "-c", "true")

# Parent
waitpid(pid, 0)

print pid
---------------------------------------------------

   If you run the code above multiple times, some runs will trigger
exceptions on the waitpid calls. Commenting the call to
informixdb.connect(), no exceptions are triggered. I am concluding that
informixdb, not Python, is handling the signals and reaping the
subprocesses.

   Now Martin, do you think I can use informixdb.py and subprocess.py in
the same application? I was thinking on forking subprocesses from the
main thread and using other threads to access the Informix database,
would that work?

Thanks,
Rafael.

Martin v. L?wis escreveu:
>>   From my experience, this primitive will fail with 'no child processes'
>> at the waitpid call if the forked child dies very quickly - before the
>> parent is scheduled back for execution. This seems to happen because
>> Python has a default SIGCHLD handler that, in this case, will reap the
>> process before the parent has the chance to do it.
> 
> What operating system is your experience from? On a POSIX system,
> this should not happen - i.e. delivery of SIGCHLD should not cause
> to make the child waited-for. Python itself does not perform wait()
> in response to SIGCHLD.
> 
>>   I would like to know if this is correct, or am I missing something here?
> 
> You must be missing something, although I'm uncertain what precisely
> that is.
> 
> Regards,
> Martin





From damondolby at googlemail.com  Tue Aug 14 13:32:48 2007
From: damondolby at googlemail.com (towers)
Date: Tue, 14 Aug 2007 10:32:48 -0700
Subject: module: zipfile.writestr - line endings issue
In-Reply-To: <1187110504.154878.317460@19g2000hsx.googlegroups.com>
References: <1187107452.905165.45700@l70g2000hse.googlegroups.com>
	<1187110504.154878.317460@19g2000hsx.googlegroups.com>
Message-ID: <1187112768.095414.223640@w3g2000hsg.googlegroups.com>

Thanks - your code works for me also.

But I still get the issue when I read the file directly and add it to
the archive.

Say if I:

1. Use the test.csv file created with your code - currently the line
endings look good (viewed in notepad on Win XP)
2. Run the following code:

# begin code
import zipfile
import os.path

# Now, create the zipfile
dfile = open('test.csv', 'r')
zip_file = zipfile.ZipFile(r'C:\temp\ice\line endings\test.zip', 'w',
zipfile.ZIP_DEFLATED)
zip_file.writestr('test.csv',dfile.read())
dfile.close()
zip_file.close()

3. Then extract the file and the file endings have been corrupted. Now
one long line in notepad. (Other programs interpret correctly though.)

Maybe the issue lies with this way (i.e. dfile.read()) of writing the
file to the archive...possibly.

Damon





On 14 Aug, 17:55, "programmer... at gmail.com" <programmer... at gmail.com>
wrote:
> On Aug 14, 11:04 am, towers <damondo... at googlemail.com> wrote:
>
>
>
> > Hi
>
> > I'm probably doing something stupid but I've run into a problem
> > whereby I'm trying to add a csv file to a zip archive - see example
> > code below.
>
> > The csv just has several rows with carriage return line feeds (CRLF).
>
> > However after adding it to an archive and then decompressing the line
> > endings have been converted to just line feeds (LF).
>
> > Does anyone know if this is a bug or am I just doing something wrong?
>
> > Many Thanks,
> > Damon
>
> > ****************************************************************************
> > import zipfile
>
> > zipFile = zipfile.ZipFile('LocalZipFile.zip', 'a',
> > zipfile.ZIP_DEFLATED)
> > dfile = open('LocalCSVFile.csv', 'r')
> > zipFile.writestr('test.csv',dfile.read())
> > dfile.close()
> > zipFile.close()
> > ****************************************************************************
>
> Line endings will drive you up the wall.  Anyway, the python zipfile
> library does not seem to be doing any translations.  The code below
> works for me.
>
> # begin code
> import zipfile
> import os.path
>
> # First create some work data...
> csv_data = '1,2\r\n3,4\r\n5,6\r\n'
>
> # Now, create the zipfile
> zip_file = zipfile.ZipFile(r'c:\tmp\test.zip', 'w',
> zipfile.ZIP_DEFLATED)
> zip_file.writestr('test.csv',csv_data)
> zip_file.close()
>
> # Now, extract the info
> zip_file = zipfile.ZipFile(r'c:\tmp\test.zip')
> assert len(zip_file.read('test.csv')) == len(csv_data)
> # end code
>
> Something else must be tweaking your line endings.
> HTH!
>
> jw




From gagsl-py2 at yahoo.com.ar  Tue Aug 28 00:07:03 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 28 Aug 2007 01:07:03 -0300
Subject: Chaining programs with pipe
References: <1187734166.384152.178040@o80g2000hse.googlegroups.com>
	<13cnbi87neru8c3@corp.supernews.com>
	<mailman.97.1187757319.32294.python-list@python.org>
	<13cogr3n6no937b@corp.supernews.com>
	<1187795716.083417.299540@q4g2000prc.googlegroups.com>
	<fau28j$gle$3@lust.ihug.co.nz>
Message-ID: <op.txq4d1pux6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 27 Aug 2007 05:35:51 -0300, Lawrence D'Oliveiro  
<ldo at geek-central.gen.new_zealand> escribi?:

> In message <1187795716.083417.299540 at q4g2000prc.googlegroups.com>,  
> Gabriel
> Genellina wrote:
>
>> On 22 ago, 11:08, Grant Edwards <gra... at visi.com> wrote:
>>
>>> but I'm a Unix guy who occasionally tries
>>> to ship a Windows version of a Python app: the concept of a
>>> process defaulting to having a stderr or stdout that wasn't
>>> writable was utterly foreign to me.
>>
>> Ah, that explains your previous post telling that things on Windows
>> don't work as they "should". They work, but not necesarily as a
>> "foreigner" would expect.
>
> So what's the good reason for Windows having unusable defaults for stderr
> and stdout, then?

You should ask the wxPython/wxWidgets guys why they choose to do things  
that way. Perhaps it's just an option that should be turned on. I'm not a  
wx guru. Tk programs don't have that problem, by example: you have a GUI  
*and* a console, if you want. A simple print statement with no console  
just goes into void space - no error, no crash, no GPF...
You get what you ask for: if you pass /SUBSYSTEM:WINDOWS as an option to  
the linker (or put equivalent flags in the executable) you don't get a  
console by default. That's fine for most GUI programs that don't use  
stdout/stderr. If you want a console, create one using AllocConsole. Or do  
that on the parent process, and let the children inherit it (as when  
running the application from the command line, as opposed to double  
clicking an icon). Or link with /SUBSYSTEM:CONSOLE. Or use  
GetStdHandle/SetStdHandle inside the app to redirect STD_OUTPUT_HANDLE etc.

-- 
Gabriel Genellina



From kyosohma at gmail.com  Mon Aug 20 10:17:02 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 20 Aug 2007 07:17:02 -0700
Subject: Python equivalent of Perl's $/
In-Reply-To: <mailman.9.1187619031.26576.python-list@python.org>
References: <mailman.9.1187619031.26576.python-list@python.org>
Message-ID: <1187619422.439013.69580@l22g2000prc.googlegroups.com>

On Aug 19, 1:13 pm, John K Masters <johnmast... at oxtedonline.net>
wrote:
> I am currently working my way through Jeffrey Friedl's book Mastering
> Regular Expressions. Great book apart from the fact it uses Perl for the
> examples.
>
> One particular expression that interests me is '$/ = ".\n"' which,
> rather than splitting a file into lines, splits on a period-newline
> boundary. Combined with Perl's 'while (<>)' construct this seems a great
> way to process the files I am interested in.
>
> Without wishing to start a flame war, is there a way to do this in Python?
>
> Regards, John
> --
> War is God's way of teaching Americans geography
> Ambrose Bierce (1842 - 1914)

Python has a Regular Expressions module. Check it out here:
http://docs.python.org/lib/module-re.html

There's also a chapter from Dive Into Python that covers this topic
too:
http://www.diveintopython.org/regular_expressions/index.html

Finally, Python "while" statement's docs can be found here:
http://docs.python.org/ref/while.html

Hope that helps!

Mike



From lac at openend.se  Sat Aug  4 14:32:46 2007
From: lac at openend.se (Laura Creighton)
Date: Sat, 4 Aug 2007 20:32:46 +0200
Subject: pyweek is happening august 02 - august 09
Message-ID: <200708041832.l74IWkRY027388@theraft.openend.se>

00:00 UTC 2007-09-02 to 00:00 UTC 2007-09-09 exactly.  See
www.pyweek.org

PyconUK is happening.  http://www.pyconuk.org/ 8th and 9th September.

This means that those of us who generally do not see each other but are
going to PyconUK could put together an entry and then sprint together
on it before PyCon UK.  There would be this terrible torment -- do
I attend the con or get my game to work -- but it is still the
best chance some of us have to work together yet.

Talk to me if you are interested in maybe making a PyconUK pygame
team.  I think that this could be a lot of fun.  Sign up on
www.pyweek.org if you think so, as well.  But mail me.

John -- assuming we want to meet up _before_ PyConUK -- can that
work?  Can you point us at a cheap hostel for a few days?

Laura Creighton


From ninja.krmenadl at nes.com  Mon Aug 20 13:09:48 2007
From: ninja.krmenadl at nes.com (Boris Ozegovic)
Date: Mon, 20 Aug 2007 19:09:48 +0200
Subject: I Need help from all the group participants
References: <fac7nj$ci9$1@localhost.localdomain>
	<1187629313.357121.196370@q4g2000prc.googlegroups.com>
Message-ID: <fachs3$dcr$1@localhost.localdomain>

mensanator at aol.com wrote:

> The only sentence that comes to mind is: 
> 
> "I hope I never find myself in a hospital that uses your system."

You are not funny. The system isn't for hospitals, it is for university
purposes.

-- 
Ne dajte da nas la?ljivac Bandi? truje:
http://cnn.blog.hr/arhiva-2007-06.html#1622776372


From dummy666 at mail.ru  Wed Aug 29 15:02:59 2007
From: dummy666 at mail.ru (askel)
Date: Wed, 29 Aug 2007 12:02:59 -0700
Subject: Creating a multi-tier client/server application
In-Reply-To: <1188408670.480447.42470@k79g2000hse.googlegroups.com>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>
	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
	<46d57888$0$295$426a74cc@news.free.fr>
	<1188398008.538820.21960@d55g2000hsg.googlegroups.com>
	<46d59fa8$0$278$426a74cc@news.free.fr>
	<1188408670.480447.42470@k79g2000hse.googlegroups.com>
Message-ID: <1188414179.783527.4240@50g2000hsm.googlegroups.com>

On Aug 29, 1:31 pm, Jeff <jeff... at gmail.com> wrote:
> Goldfish--thanks, I'll check it out.
>
> > > That, or something similar, may be what I do.  It would mean, however,
> > > developing my own method for transferring objects across the network,
>
> > Why transfering "objects" ? You only need to transfer data.
>
> I suppose I don't need to transfer objects, it just seems like it
> would make it far easier (certainly less repetition of code) to
> program the client-side app.

If you prefer to deal with RPC-like protocol, take a look at Ice by
ZeroC (http://www.zeroc.com/).



From stefan.behnel-n05pAM at web.de  Thu Aug 16 03:18:18 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Thu, 16 Aug 2007 09:18:18 +0200
Subject: ElementTree surprise
In-Reply-To: <7x4pj0xax0.fsf@ruckus.brouhaha.com>
References: <7xd4xoxf16.fsf@ruckus.brouhaha.com>
	<87bqd89gkd.fsf@wilson.homeunix.com>
	<7x4pj0xax0.fsf@ruckus.brouhaha.com>
Message-ID: <46c3fa3a$0$16098$9b4e6d93@newsspool1.arcor-online.net>

Paul Rubin wrote:
> Torsten Bronger <bronger at physik.rwth-aachen.de> writes:
>>>     <foo bar="parrot"></foo>
>> Technically, text is nodes as all other element nodes.  In the
>> parrot example, there is no empty textnode but no textnode at all.
> 
> That is required by the xml standard?  If yes, elementtree is doing
> the right thing, but it surprises me, I would have expected an empty
> string.  Thanks.

The XML standard defines both as being equivalent, so any XML parser would
handle them exactly the same. Also, as most XML parsers have a SAX(-like)
interface, which always generates events in the "<foo></foo>" form, there is
not even a way for applications or libraries to distinguish between the two.

So it's not even an ElementTree thing. ET just doesn't know what exactly was
in the original XML byte stream. A very simple way to make sure you always get
a string back is

    >>> text = element.text or ""

BTW, you'd be even more surprised to see that ET can actually /store/ "" as
text if you tell it to, and then returns an empty string when you ask for the
.text property. But any empty text coming from the parser will always be None.

Oh, and lxml.etree behaves exactly the same as ElementTree here. :)

Stefan


From kyosohma at gmail.com  Fri Aug 17 11:47:15 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 17 Aug 2007 08:47:15 -0700
Subject: Hijack! Different book:
In-Reply-To: <mailman.2077.1187297463.22759.python-list@python.org>
References: <mailman.1957.1187093157.22759.python-list@python.org>
	<1187096231.194685.86030@m37g2000prh.googlegroups.com>
	<20070814154913.D8C3C1E400A@bag.python.org>
	<8a6b8e350708141020q495b22der4c362ee3df618d82@mail.gmail.com>
	<mailman.1979.1187113641.22759.python-list@python.org>
	<1187117012.088495.247890@q4g2000prc.googlegroups.com>
	<1187191950.037749.8050@z24g2000prh.googlegroups.com>
	<13c6fb3pntv6n13@corp.supernews.com>
	<1187263267.314987.253590@a39g2000hsc.googlegroups.com>
	<13c8u9nd4fk7r0d@corp.supernews.com>
	<mailman.2077.1187297463.22759.python-list@python.org>
Message-ID: <1187365635.525716.322290@x40g2000prg.googlegroups.com>

On Aug 16, 3:50 pm, Steve Holden <st... at holdenweb.com> wrote:
> Dennis Lee Bieber wrote:
> > On Thu, 16 Aug 2007 04:21:07 -0700, Paul Boddie <p... at boddie.org.uk>
> > declaimed the following in comp.lang.python:
>
> >> Is this the book that came out before TurboGears even reached 1.0,
> >> probably having diminished relevance now that there are 1.1 and 2.0
>
> >    Not sure -- I'd ordered it in January, but Amazon didn't ship it
> > until a week ago; don't know if it was this, or the other book in the
> > shipment that held it up.
>
> JANUARY!?????? So much for Amazon's customer service. Or is it only
> February where you live?
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------

Yeah...The Python Power! book was supposed to be released months ago,
so I ordered it 4-6 months ago, but it only shipped a week ago when it
actually released. Admittedly, this has nothing to do with the
TurboGears book.

Mike



From f.guerrieri at gmail.com  Fri Aug 31 09:20:36 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Fri, 31 Aug 2007 15:20:36 +0200
Subject: pure python for sms
In-Reply-To: <46D81968.60303@fmed.uba.ar>
References: <mailman.161.1188500323.28954.python-list@python.org>
	<BtHBi.28617$4A1.5445@news-server.bigpond.net.au>
	<46D81968.60303@fmed.uba.ar>
Message-ID: <79b79e730708310620v32011da5xbb6580361477fffe@mail.gmail.com>

On 8/31/07, Gerardo Herzig <gherzig at fmed.uba.ar> wrote:
> Well, im not triyng to send a SMS `FROM' a cellphone, im trying to send
> a SMS `TO' a cellphone. Here (in Argentina) are several sites who lets
> you send a sms for free. You also can receive SMS responses via this page
> http://sms.personal.com.ar/Mensajes/msn.htm
>
> While my tries using this page via urllib failed, i dont want to depend
> on an external page anyway. The  python class you  send to me looks like
> a  pay site (if not, i dont see why the tokenpay() and getbalance()
> methods :)
>
> I was also avaiable to send a sms in the form of an plain email
> __cellphone_number at i_used_to_be_cool_smtp.com, but it not seems to work
> this way no longer. Again, i dont want to do it that way anyway.
>
> Thats why im looking for a python implementation of that funcionality.

Well but sooner or later you will have to pass your sms through some
cellular system network whose services someone has to pay for...no?

Francesco


From sentientholon at gmail.com  Tue Aug 21 13:03:39 2007
From: sentientholon at gmail.com (sentientholon)
Date: Tue, 21 Aug 2007 17:03:39 -0000
Subject: Newbee Question
In-Reply-To: <1187715131.514463.84960@57g2000hsv.googlegroups.com>
References: <mailman.15.1187620149.26576.python-list@python.org>
	<1187621470.484615.7010@i13g2000prf.googlegroups.com>
	<mailman.19.1187621934.26576.python-list@python.org>
	<1187622390.854759.162320@q3g2000prf.googlegroups.com>
	<1187650036.450645.185500@a39g2000hsc.googlegroups.com>
	<1187685502.855643.122800@r34g2000hsd.googlegroups.com>
	<1187715131.514463.84960@57g2000hsv.googlegroups.com>
Message-ID: <1187715819.382422.210680@m37g2000prh.googlegroups.com>

On Aug 21, 11:52 am, "hd1... at yahoo.com" <hd1... at yahoo.com> wrote:
> I tryed your code and got an error message #I use Wing IDE:
> Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)]
> Type "help", "copyright", "credits" or "license" for more information.
>
> Evaluating lines 1-16 from truckStops.py
> <string>:7: Warning: 'yield' will become a reserved keyword in the
> future
> Could not execute because an error occurred:
>   invalid syntax: <string>, line 7, pos 19:
>           yield stops, wage

Python 2.2.3 is three versions behind.  Generators only work in 2.2 by
saying:

from __future__ import generators

And by default in anything from 2.3 on.

Fred



From mail at microcorp.co.za  Fri Aug  3 02:52:29 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 3 Aug 2007 08:52:29 +0200
Subject: i am new to python-Please somebody help
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com><pan.2007.08.02.12.51.13.363293@REMOVE.THIS.cybersource.com.au><1186063842.827016.95030@q3g2000prf.googlegroups.com>
	<46b249a4$0$31219$426a74cc@news.free.fr>
Message-ID: <00fb01c7d59b$97549b20$03000080@hendrik>

"Bruno Desthuilliers" <bdes...art.fr> wrote:

>Now if you want some examples of definitively "rude" newsgroups, I 
>suggest you take your chance on other newsgroups in the comp.* 
>hierarchy...

I know someone who derisively refers to anybody that is associated 
with computers in any way as a "Pencil Neck".

This leads me to wonder whether or not the rudeness stems from 
the physically deficient's urge to kick sand in the bully's face.

- Hendrik



From carsten at uniqsys.com  Mon Aug  6 02:10:38 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 06 Aug 2007 02:10:38 -0400
Subject: Misleading wikipedia article on Python 3?
In-Reply-To: <87y7gpr33a.fsf@pobox.com>
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de> <877io9soa1.fsf@pobox.com>
	<46B63F0E.8030208@v.loewis.de>  <87y7gpr33a.fsf@pobox.com>
Message-ID: <1186380638.3288.24.camel@localhost.localdomain>

On Sun, 2007-08-05 at 23:09 +0000, John J. Lee wrote:
> I just wanted to know: is it easy to make my code so it
> runs on 2.6 and 3.0, without funny stuff like a code translator?

That depends on your definitions of "easy" and "funny stuff." I'm pretty
sure you'll be able to run the same source code on Python 2.6 and Python
3.0 without either one breaking, as long as the code is written
sufficiently carefully. You may have to give up some Python 3.0 features
and/or write compatibility shims depending on what features you'll need.
Whether that's acceptable depends on the features you need and how much
"yak shaving" you find acceptable.

For instance, if you never use print statements in your code, you won't
notice that print is becoming a function. If you do, you'll have to make
appropriate accommodations.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From kyosohma at gmail.com  Tue Aug 28 10:20:05 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 28 Aug 2007 07:20:05 -0700
Subject: Getting subprocesses to be hidden on Windows
In-Reply-To: <1188309590.114918.257670@y42g2000hsy.googlegroups.com>
References: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
	<1188250115.875160.276780@r29g2000hsg.googlegroups.com>
	<1188292102.065625.82670@22g2000hsm.googlegroups.com>
	<1188308231.196513.291260@19g2000hsx.googlegroups.com>
	<1188309590.114918.257670@y42g2000hsy.googlegroups.com>
Message-ID: <1188310805.381229.13270@y42g2000hsy.googlegroups.com>

On Aug 28, 8:59 am, geoffbache <geoff.ba... at pobox.com> wrote:
> > Which GUI toolkit are you using? Tkinter, wxPython, pyQt?
>
> Primarily PyGTK, but I was hoping it wouldn't matter. I hope to be
> able
> to start the process as indicated in the original post from within my
> test
> tool and instruct the subprocess to be hidden (or minimized? would
> that be easier?),
> irrespective of what it was (it might be a Java GUI or anything for
> all I care...)
>
> > As for
> > losing the command window on Windows, the best way that I know of is
> > to just change the extension of the python file itself from *.py to
> > *.pyw . I'm pretty sure you can suppress command windows if you're
> > calling them from the command line using a flag, but I can't recall
> > the flag off the top of my head.
>
> Thanks, that seemed to work.
>
> > One way to test while still being able to use your computer is to
> > install a virtual machine with VMWare or some similar product. I use
> > VMWare's free software for testing some of my scripts, but I've heard
> > that Microsoft's got a free virtual product that isn't half bad.
>
> OK. If all else fails I might try that. But if there is a solution to
> the original
> problem it would be nice not to have to install VMWare everywhere for
> convenient testing...
>
> Geoff

I did a quick google and found the following, which probably only
applies to Windows:

http://www.tech-recipes.com/windows_tips512.html

I know that with wxPython, you can tell it to whether or not to show
the frame. Maybe pyGTK has the same functionality? This link seems to
suggest that that maybe a valid option, but it doesn't detail how to
accomplish it:

http://www.daa.com.au/pipermail/pygtk/2000-August/000300.html

This might be better: http://linuxgazette.net/issue78/krishnakumar.html

Looks to me like you could just omit the "show" method. However, I
have never used that particular toolkit. When you run stuff hidden
like that, it can be difficult to kill them.

Mike



From alextabone at gmail.com  Wed Aug  1 05:14:54 2007
From: alextabone at gmail.com (Acm)
Date: Wed, 01 Aug 2007 02:14:54 -0700
Subject: calling a .net application from Python 2.5
Message-ID: <1185959694.045149.214050@19g2000hsx.googlegroups.com>

I am working with Python 2.5.

I would like to know how to call a .NET application (or .dll) from a
Python script.

Can anyone help please?

Thank you.



From jstroud at mbi.ucla.edu  Wed Aug 22 13:26:38 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 22 Aug 2007 17:26:38 GMT
Subject: libgmail failure
In-Reply-To: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
References: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
Message-ID: <il_yi.1379$JD.695@newssvr21.news.prodigy.net>

james.p.news at gmail.com wrote:
> Hey all,
> 
> I've been using libgmail to send out automated notification emails for
> my company's nightly regression testing.  Last night these emails
> started failing, though the python code has not changed.  I updated to
> the latest libgmail, but that isn't helping.  I've logged in to the
> email account directly, and the account is still working fine.
> 
> The error I get is "HTTP Error 400: Bad Request" when using
> gmailAccount.login().  This doesn't throw an exception, just prints
> the error.  The code crashes outright when it tries to send mail.
> 
> This code has been up and running for several months and just started
> failing last night.  Does anyone have an idea what's going on?
> 
> The code and error follow (fairly short :-)
> 
> Thanks much,
> James

Have you thought about spoofing explorer? Always spoof explorer.

James


From horpner at yahoo.com  Mon Aug 13 09:37:26 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 13 Aug 2007 13:37:26 GMT
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<slrnfbeofu.20s.horpner@FIAD06.norwich.edu>
	<1186424693.529497.217040@w3g2000hsg.googlegroups.com>
	<46B8626A.2070303@bigfoot.com>
	<mailman.1726.1186537161.22759.python-list@python.org>
	<5hsoi3F3mlni2U1@mid.individual.net> <f9ceb9$jsm$1@sea.gmane.org>
	<1186581124.3383.55.camel@dot.uniqsys.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
	<slrnfbk19k.20o.horpner@FIAD06.norwich.edu>
	<1i2nhxn.tme05x17r39odN%aleax@mac.com>
	<m3hvi.37606$G23.6240@newsreading01.news.tds.net>
	<EAqvi.37622$G23.4722@newsreading01.news.tds.net>
	<1i2oxyo.cprrpi3nqji1N%aleax@mac.com>
Message-ID: <slrnfc0mtk.1us.horpner@FIAD06.norwich.edu>

On 2007-08-12, Alex Martelli <aleax at mac.com> wrote:
> Neil Cerutti <horpner at yahoo.com> wrote:
>    ...
>> OK, I've thought about this some more and I think the source
>> of my confusion was I thought assignment in Python meant
>> binding a name to something, not mutating an object. But in
>> the case of augmented assignment, assignment no longer means
>> that?
>
> "Plain" assignment *to a plain name* does mean "binding a name"
> (the LHS) to "something" (the RHS).
>
> Other assignments (ones that are not "plain" assignments to
> names) may have different meanings.  For example:
>
>>>> class act(object):
> ...   def __init__(self, c): self._c = c
> ...   def getC(self): return self._c
> ...   def setC(self, *ignore): self._c += 1
> ...   c = property(getC, setC)
> ...   
>>>> x = act(0)
>>>> x.c
> 0
>>>> x.c = 23
>>>> x.c
> 1
>
> Here's an example where a plain assignment (to an attribute of x, not to
> a plain name) obviously DOESN'T mean "binding a name to something": the
> "something" (the RHS) is completely ignored, so the plain assignment is
> mutating an object (x) and not binding any name to anything.

That's enlightening. I hadn't considered the implications of
generalizing assignment to names with assignment to qualified
names.

> Plain assignments to items and slices can also often be best
> seen as "mutating an object" (the one being indexed or sliced
> on the LHS) rather than "binding a name".  For example:
>
>>>> l=list('ciao')
>>>> l[1:3]='app'
>>>> l
> ['c', 'a', 'p', 'p', 'o']

That example makes me feel ashamed for not thinking of it, since
I use the slicing assignment all the time and it's "obviously"
not a binding construct.

> If I was teaching Python and came upon this example, I would
> definitely not try to weaselword the explanation of what's
> going on in terms of "binding a name" (or several ``names'',
> including ``rebinding" a new ``name'' l[4] to the 'o' that was
> previously ``bound'' to l[3], etc:-): it's just orders of
> magnitudes simpler to explain this as "mutating an object",
> namely the list 
>
> I take almost 3 pages in "Python in a Nutshell" (47 to 49 in
> the second edition) to summarily explain every kind assignment
> -- and that's in a work in which I've tried (successfully, I
> believe from reviews) to be very, *VERY* concise;-).
>
> Summarizing that summary;-), a plain assignment to an identifier binds
> that name; a plain assignment to an attribute reference x.y asks object
> x (x can be any expression) to bind its attribute named 'y'; a plain
> assignment to an indexing x[y] (x and y are arbitrary expressions) asks
> object x to bind its item indicated by the value of y); a plain
> assignment to a slicing is equivalent to the plain assignment to the
> indexing with an index of slice(start, stop, stride) [[slice is a Python
> builtin type]].
>
> Plain assignment to an identifier "just happens"; all other cases of
> plain assignment are requests to an object to bind one or more of its
> attributes or items (i.e., requests for specific mutations of an object)
> -- as for, say any method call (which might also be a request for some
> kind of mutation), the object will do whatever it pleases with the
> request (including, perhaps, "refusing" it, by raising an exception).
>
> Then we get into unpacking assignments and augmented
> assignments, but I don't really want to write two more pages
> worth of summary...;-).

Thanks very much for taking the time to help clear up my
erroneous model of assignment in Python. I'd taken a conceptual
shortcut that's not justified.

-- 
Neil Cerutti


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug  3 11:57:30 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 03 Aug 2007 17:57:30 +0200
Subject: (no) fast boolean evaluation ?
In-Reply-To: <pan.2007.08.03.14.24.23.227662@REMOVE.THIS.cybersource.com.au>
References: <30454$46b24f81$d443bb3a$10370@news.speedlinq.nl>
	<cfb58d850708021619s298f69b9p3af86905d1695939@mail.gmail.com>
	<mailman.1551.1186099243.22759.python-list@python.org>
	<46b2e56b$0$18879$426a74cc@news.free.fr>
	<pan.2007.08.03.14.24.23.227662@REMOVE.THIS.cybersource.com.au>
Message-ID: <46b35069$0$17822$426a74cc@news.free.fr>

Steven D'Aprano a ?crit :
> On Fri, 03 Aug 2007 10:20:59 +0200, Bruno Desthuilliers wrote:
> 
>> Joshua J. Kugler a ?crit :
>>> On Thursday 02 August 2007 15:19, Evan Klitzke wrote:
>>>>> I discovered that boolean evaluation in Python is done "fast"
>>>>> (as soon as the condition is ok, the rest of the expression is ignored).
>>>> This is standard behavior in every language I've ever encountered.
>>> Then you've never programmed in VB (at least 6, don't know if .net still
>>> does this).  Nested IF statements. AAAAAAAAAAAAAAAAAAAACK! 
>> I do remember an even brain-deadiest language that not only didn't 
>> short-circuit boolean operators but also didn't have an "elif" statement...
> 
> 
> Is it a secret?
> 
> I'm a little perplexed at why you say a language without "elif" is a good
> sign of brain-death in a programming language. I understand that, given
> the parsing rules of Python, it is better to use elif than the equivalent:
> 
> if condition:
>     pass
> else:
>     if another_condition:
>         pass
> 
> 
> But that's specific to the syntax of the language. You could, if you
> choose, design a language where elif was unnecessary:
> 
> if condition:
>     pass
> else if another_condition:
>     pass
> 
> What advantage is there to "elif", apart from it needing three fewer
> characters to type?
> 

Sorry, I forgot to mention the language did not allow to have else & if 
in the same statement. IOW :

if some_condition then
   do_sometehing
else
   if some_other_condition then
     do_something_else
   else
     if yet_another_condition then
       do_yet_another_thing
     else
       if your_still_here then
          give_up('this language is definitively brain dead')
       end if
     end if
   end if
end if



From thomas at jollans.com  Wed Aug  1 19:53:30 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Thu, 2 Aug 2007 01:53:30 +0200
Subject: sending very large packets over the network
In-Reply-To: <9c8d48280708011555l5d1d439fu3c5fbcc61dc41f07@mail.gmail.com>
References: <9c8d48280708011555l5d1d439fu3c5fbcc61dc41f07@mail.gmail.com>
Message-ID: <200708020153.35321.thomas@jollans.com>

On Thursday 02 August 2007, Walker Lindley wrote:
> OK, I'm back with another networking question. I'm trying to seend large
> amounts of information over TCP (the length of data being given to send()
> is on the order of 16000 characters in length). Unfortunately on the
> receiving end, the packets appear to be truncated. So I wrote some code
> that continuously tries to send bigger and bigger packets until it fails
> and noticed that it never fails at the same length. I'm not even sure these
> two things are related, but is there some undocumented (or documented and I
> missed it) maximum size for data you can pass to send()?

First off, very long messages, that is messages whose length cannot be 
represented in a C size_t, are probably right out ;-)

from the send(2) manual page on my Debian system:

> If the message is too long to pass atomically  through  the  underlying
> protocol, the error EMSGSIZE is returned, and the message is not trans?
> mitted.


from the Python socket.send documentation [1]
> Send data to the socket. The socket must be connected to a remote socket.
> The optional flags argument has the same meaning as for recv() above.
> Returns the number of bytes sent. Applications are responsible for checking
> that all data has been sent; if only some of the data was transmitted, the
> application needs to attempt delivery of the remaining data.

that makes it quite clear that it's possible that not all data was 
transmitted. That you were unable to find a fixed size may be explainable in 
many ways - it might just be the way your operating system's TCP/IP stack 
works.

If you just want to send data in some way or another, do yourself a favour and 
use socket.sendall instead of socket.send. Docs for socket.sendall: [1]

> Send data to the socket. The socket must be connected to a remote socket.
> The optional flags argument has the same meaning as for recv() above.
> Unlike send(), this method continues to send data from string until either
> all data has been sent or an error occurs. None is returned on success. On
> error, an exception is raised, and there is no way to determine how much
> data, if any, was successfully sent.


[1]: http://docs.python.org/lib/socket-objects.html

-- 
      Regards,                       Thomas Jollans
GPG key: 0xF421434B may be found on various keyservers, eg pgp.mit.edu
Hacker key <http://hackerkey.com/>:
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From larry.bates at websafe.com  Fri Aug 31 19:40:02 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 31 Aug 2007 18:40:02 -0500
Subject: Python Unicode to String conversion
In-Reply-To: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
References: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
Message-ID: <wtSdndh9-MFRO0XbnZ2dnUVZ_o-mnZ2d@comcast.com>

thijs.braem at gmail.com wrote:
> Hi everyone,
> 
> I'm having quite some troubles trying to convert Unicode to String
> (for use in psycopg, which apparently doesn't know how to cope with
> unicode strings).
> 
> The error I keep having is something like this:
> ERREUR:  S?quence d'octets invalide pour le codage ?UTF8? : 0xe02063
> 
> (sorry, locale is french, it means "byte sequence invalid for encoding
> <<utf8>>", the value is probably an e with one of the french accents)
> 
> I've found lots of stuff about this googling the error, but I don't
> seem to be able to find a "works always"-function just to convert a
> unicode variable back to string...
> 
> If someone could find me a solution, that'd really be a lifesaver.
> I've been losing hours and hours over this one :s
> 
> thijs
> 
Question is, what should it be converted to when there is no corresponding
ascii character to map the offending character to?  Do you want to throw it 
away?  Your expectation "works always" is very ill-defined.  Write a small 
function to process the strings yourself and set up a substitution dictionary to 
do the conversion yourself.

-Larry


From sjmachin at lexicon.net  Fri Aug 31 21:36:44 2007
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 31 Aug 2007 18:36:44 -0700
Subject: Parameter Passing - String Variable Truncated ?
In-Reply-To: <1188604442.700651.94530@19g2000hsx.googlegroups.com>
References: <1188604442.700651.94530@19g2000hsx.googlegroups.com>
Message-ID: <1188610604.701171.287210@e9g2000prf.googlegroups.com>

On Sep 1, 9:54 am, goldtech <goldt... at worldpost.com> wrote:
> Hi,
>
> I'm passing what I think is a string parameter to another Python
> program (spawn.py)  - see the code snip below. But only the counter
> part gets printed to a log file via  spawn.py. Yet the echo print to
> the output window shows the whole string with the fc part. Better
> explained below I hope, there's the calling .py and the spawn
> script .py:
> ...snip...
> while fc:
>     counter = counter + 1
>     fc_cntr = str(counter) + ' : ' + fc
>     print fc_cntr + '\n'  # Print to Pythonwin interactive window -
> eg. "1 : New York" - all is printed OK
>
>     arglist = []
>     arglist.append(pythonPath)
>     arglist.append(spawn_script)
>     arglist.append(fc_cntr)  # This gets sent to the spawn_script but
> only "1" gets printed
>
>     os.spawnv(os.P_WAIT, pythonPath, arglist)
>     fc = fcs.next()
> ...
> --------------------------
> ## the spawn_script
> import win32com.client, sys, os, time, re
>
> in_featclass = sys.argv[1]
> handle = open('C:\\log_file.txt', 'a')
> handle.write(in_featclass + "\n") # ONLY the counter part gets printed
> to the log file!    Why?
> --------------------------

Try handle.write(repr(sys.argv[1:]) + "\n")
and come back with your conclusions ... unless of course someone has
spoonfed you in the meantime.

Another clue: write yourself a little arg-dumper script and try
running it in a Command Prompt window.
8<---
import sys
for x, arg in enumerate(sys.argv):
    print x, repr(arg)
8<---
HTH,
John



From afriere at yahoo.co.uk  Mon Aug 20 21:18:43 2007
From: afriere at yahoo.co.uk (Asun Friere)
Date: Mon, 20 Aug 2007 18:18:43 -0700
Subject: str().join() isn't working
In-Reply-To: <1187634895.387910.179500@m37g2000prh.googlegroups.com>
References: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com>
	<mailman.4.1187633821.32294.python-list@python.org>
	<1187634895.387910.179500@m37g2000prh.googlegroups.com>
Message-ID: <1187659123.397704.195900@m37g2000prh.googlegroups.com>

On Aug 21, 4:34 am, kyoso... at gmail.com wrote:
> to concatenate 2 lists to each other before it does the join, ... is
> impossible in Python. The "+" operator is only for addition and for
> two or more strings.

Really?

>>> [1,2,3] + [4,5,6]
[1, 2, 3, 4, 5, 6]



From dummy at example.com  Sat Aug 25 06:57:24 2007
From: dummy at example.com (John W. Krahn)
Date: Sat, 25 Aug 2007 10:57:24 GMT
Subject: Regular expression use
In-Reply-To: <famms0$em2$1@gemini.csx.cam.ac.uk>
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
	<famlj0$33k$1@mlucom4.urz.uni-halle.de>
	<famms0$em2$1@gemini.csx.cam.ac.uk>
Message-ID: <oWTzi.1954$bO6.752@edtnps89>

Nick Maclaren wrote:
> In article <famlj0$33k$1 at mlucom4.urz.uni-halle.de>,
> Mirco Wahab <wahab-mail at gmx.net> writes:
> |> 
> |> Using complex regular expressions is like tank destruction
> |> with contact charges glued on them.  Only a few people
> |> will even survive the first "usage", but survivors will
> |> then eventually be able to destroy almost every tank with
> |> tremendous speed and precision.
> 
> I must remember that!  It is nicely put.

I couldn't understand it.  (An old Centurion trooper.)


John
-- 
Perl isn't a toolbox, but a small machine shop where you
can special-order certain sorts of tools at low cost and
in short order.                            -- Larry Wall


From jjl at pobox.com  Tue Aug  7 15:49:43 2007
From: jjl at pobox.com (John J Lee)
Date: Tue, 7 Aug 2007 20:49:43 +0100 (BST)
Subject: mmm-mode, python-mode and doctest-mode?
In-Reply-To: <46B8341E.2090805@gradient.cis.upenn.edu>
References: <46B8341E.2090805@gradient.cis.upenn.edu>
Message-ID: <Pine.LNX.4.64.0708072026540.6411@alice>

On Tue, 7 Aug 2007, Edward Loper wrote:

> [John J Lee]
>> Is it possible to get doctest-mode to work with mmm-mode and python-mode 
>> nicely so that docstrings containing doctests are editable in doctest-mode?
>
> I recently released a new version of doctest-mode [1], and I came across your 
> email [2] (it was on the first page of google hits for "doctest-mode").  So I 
> decided to have a go at getting doctest-mode to play nicely with mmm-mode. 
> The result is available here:
>
> https://python-mode.svn.sf.net/svnroot/python-mode/trunk/python-mode/doctest-mode.el

Nice!  Works for me so far (emacs 22).

I'm also very pleased to see that doctest-mode no longer attempts to 
auto-fill at the end of long lines -- that was extremely annoying, and the 
new behaviour is a big improvement.

Here's another wish.  My next-nearest doctest-mode annoyance: hitting TAB 
should have similar behaviour to python-mode.  So, the first press of the 
TAB key gets you a sensible guess at the indentation you want.  The second 
and subsequent TAB keypresses cycle through no indentation, '>>>' 
indentation, and '...' indentation.  Ideally this would be made to work in 
combination with the standard indentation-cycling behaviour in those cases 
where multiple indentations are allowed within Python code (so, it might 
be ' ...         ', '', '    >>> ', '    ... ','    ...     ',
' ...         ' as the TAB key is repeatedly pressed).


>> `doctest-example'
>>
>>     Used to edit doctest examples in text-editing modes, such as
>>     `rst-mode' or `text-mode'.  Docstring submode regions start with
>>     optionally indented prompts (>>>) and end with blank lines.  Use
>>     (C-c % C-e) to insert a new doctest-example region.  When
>>     `doctest-execute' (C-c C-c) is called inside a doctest-example
>>     region, it executes all examples in the buffer.

I couldn't immediately see how to get this working in a .doctest file, so 
haven't tried this yet.

Another wish: Even though I don't normally run code from emacs directly, I 
do think it would be very handy indeed to be able to execute a *single* 
doctest example from doctest-mode.  Don't know what keybinding would be 
conventional...


John



From countblabula at yahoo.com  Mon Aug  6 15:04:55 2007
From: countblabula at yahoo.com (Lee Fleming)
Date: Mon, 06 Aug 2007 12:04:55 -0700
Subject: Something in the function tutorial confused me.
In-Reply-To: <mailman.1690.1186424847.22759.python-list@python.org>
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<slrnfbe1fd.n4.horpner@FIAD06.norwich.edu>
	<1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<mailman.1690.1186424847.22759.python-list@python.org>
Message-ID: <1186427095.157399.163160@k79g2000hse.googlegroups.com>

On Aug 6, 1:26 pm, Steve Holden <st... at holdenweb.com> wrote:
> Lee Fleming wrote:
> > On Aug 6, 6:25 am, Neil Cerutti <horp... at yahoo.com> wrote:
> > Because when the function is called,  the line
>
> >>     if y is None: y = []
>
> > is executed, binding a brand new empty list to y. This
> > "rebinding" happens every time the function is called, unless you
> > provide an argument for y that is not None.
>
> > Thanks for the prompt replies. But I am still confused. This is what
> > confuses me....
> > The first time you call the function, say with f(23), after the
> > function ends,
> > y no longer equals None. Therefore, calling f again, this time like
> > this f(24),
> > should make y equal [23,24], because the 'if y == None' test fails, or
> > at least I think it
> > fails, because y.append(x) added something that was not equal to None
> > during the previous call.
>
> > Please help me!
>
> The thing that doesn't seem to have been stated explicitly is that each
> function call creates a brand-new namespace. This namespace is
> initialized from the function definition, which includes assignment of
> default values to absent keyword arguments. The function definition,
> then, contains a reference to each default argument value.
>
> In the case that tripped you up, however, the default argument you
> provided was a mutable object (a list) that can be changed in place by
> operations like .append(), whereas when you provide a None default any
> further assignment to the argument name binds it to a new value. In the
> first case, changes to the object are naturally reflected in later
> calls, since it is the object referenced in the function definition that
> is being mutated.
>
> It's only really the same difference as
>
> a = [1, 2]
> b = a
> a.append("three")
>
> which modifies a single list to which both names, a and b, are bound, and
>
> a = 5
> b = a
> a += 3
>
> which rebinds the name a to a new object, meaning that a and b are no
> longer bound to the same object.
>
> regards
>   Steve
>
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------- Hide quoted text -
>
> - Show quoted text -

Thanks! I'm glad you all took the time out to help me. :)



From gherron at islandtraining.com  Sun Aug 19 13:29:10 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 19 Aug 2007 10:29:10 -0700
Subject: How to setup pyOpenGL3.0.a6 for window xp?
In-Reply-To: <1187541646.185788.15310@k79g2000hse.googlegroups.com>
References: <1187395670.267971.88750@q4g2000prc.googlegroups.com>	<1187397743.937458.301590@q3g2000prf.googlegroups.com>
	<1187541646.185788.15310@k79g2000hse.googlegroups.com>
Message-ID: <46C87DE6.30203@islandtraining.com>

Jason wrote:
> On Aug 17, 6:42 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
>   
>> Windows comes with OpenGL libraries.  However, before you can use
>> OpenGL you'll need a package that can provide an OpenGL context, which
>> PyOpenGL doesn't do (easily).
>>
>> PyGame is the typical choice for most uses.  If all you need is a
>> simple window to draw on, this is the package you want.
>>     
If you want an *easy* way to create an OpenGL window and context, you
could try FLTK, and it's Python wrapper PyFLTK.  It's a simple (nice,
very small, well featured and consistent) widget toolkit with OpenGL
support.  Once the window is open, PyOpenGL (versions 2xx or 3xx) work
perfectly on the window.

See http://www.fltk.org/

Gary Herron



>> However, it doesn't (easily) work with common GUIs like GTK and Wx.
>> If you want to use use OpenGL in a GUI app, then you'll want to find
>> an "OpenGL canvas widget" for that GUI.
>>
>> Carl Banks
>>     
>
> Sorry Carl, but I'm a bit confused with your third paragraph.  Do you
> mean that PyGame doesn't work easily with Wx/GTK, or that OpenGL
> doesn't work easily with Wx/GTK?
>
> If it's the second, then I must disagree.  wxPython comes with an
> OpenGL widget in the "wx.glcanvas" module.  The widget only requires
> PyOpenGL.  The wxPython Demo shows how to set up and program the
> widget quite easily.  Another example is at: "http://
> aspn.activestate.com/ASPN/Cookbook/Python/Recipe/325392".
>
> Unfortunately, I don't have much experience with PyGTK.  Their FAQ
> does indicate that you need an extension to add OpenGL support.
>
>   --Jason
>
>   



From neil.chriss at gmail.com  Sun Aug  5 22:16:17 2007
From: neil.chriss at gmail.com (RichSaneSwindler)
Date: Mon, 06 Aug 2007 02:16:17 -0000
Subject: Pyscripter
In-Reply-To: <10a14$46b58c8d$d443bb3a$18267@news.speedlinq.nl>
References: <1186302328.706942.242920@q75g2000hsh.googlegroups.com>
	<10a14$46b58c8d$d443bb3a$18267@news.speedlinq.nl>
Message-ID: <1186366577.950835.56100@w3g2000hsg.googlegroups.com>

On Aug 5, 4:45 am, Stef Mientki <S.Mientki-nos... at mailbox.kun.nl>
wrote:
> RichSaneSwindler wrote:
> > I think that pyscripter is the most promising Python IDE around
>
> but for windows only !
>   and I
>
> > am exciting about its possibilities. However, I find a few issues with
> > it annoying enough that I don't use it. They seem easily fixed in
> > which case I think it would be superior to most IDEs. I am wondering
> > if any users out there would like to add to/debate this list of
> > benefits and issues (for reference I am using Pyscripter
>
> Neil,
> PyScripter has it's own discussion list
>    http://groups.google.com/group/PyScripter/topics?hl=en
> and from my own experiences,
> I know that Kiriakos (the designer) is very willing to listen to good ideas,
> and if they are good he'll implement them in no time !
>
> cheers,
> Stef

Thanks, I will copy my message there.

Neil



From jjl at pobox.com  Mon Aug 20 15:38:27 2007
From: jjl at pobox.com (John J. Lee)
Date: Mon, 20 Aug 2007 19:38:27 GMT
Subject: urllib2.urlopen(url) pulling something other than HTML
References: <1187635452.841155.88720@a39g2000hsc.googlegroups.com>
Message-ID: <87lkc6xah9.fsf@pobox.com>

"dogatemycomputer at gmail.com" <dogatemycomputer at gmail.com> writes:
[...]
> ----------------------------------------------------------
> f = formatter.AbstractFormatter(formatter.DumbWriter(StringIO()))
> parser = htmllib.HTMLParser(f)
>     parser.feed(html)
>     parser.close()
>     return parser.anchorlist
> ----------------------------------------------------------
>
> I get the idea that we're allocating some memory that looks like a
> file so formatter.dumbwriter can manipulate it.

Don't worry too much about memory.  The "StringIO()" probably only
really allocates the memory needed for the "bookkeeping" that StringIO
does for its own internal purposes, not the memory needed to actually
store the HTML.  Later, when you use the object, Python will
dynamically (== at run time) allocate the necessary memory for the
HTML, when the .write() method is called on the StringIO instance.
Python handles the memory allocation for you -- though of course the
code you write affects how much memory gets used.

Note:

 - The StringIO is where the *output* HTML goes.

 - The formatter.DumbWriter likely doesn't do anything with the
   StringIO() at the time it's passed (it hasn't even seen your HTML
   yet, so how could it?).  Instead, it just squirrels away the
   StringIO() for later use.

> The results are
> passed to formatter.abstractformatter which does something else to the
> HTML code.

Again, nothing much happens right away on the "f = ..." line.  The
formatter.AbstractFormatter just keeps the formatter so it can use it
to format HTML later on.


> The results are then passed to "f" which is then passed to

The results are not "passed" to f.  Instead, the results are given a
name, "f".  You can give a single object as many names as you like.


> htmllib.HTMLParser so it can parse the html for links.   I guess I

htmllib.HTMLParser wants the formatter so it can format output
(e.g. you might want to write out the same page with some of the links
removed).  It doesn't need the formatter to parse the HTML.
HTMLParser itself is responsible for the parsing -- as the name
implies.


> don't understand with any great detail as to why this is happening.
> I know someone is going to say that I should RTFM so here is the gist
> of the documentation:
>
> formatter.DumbWriter = "This class is suitable for reflowing a
> sequence of paragraphs."
> formatter.AbstractFormatter = "The standard formatter. This
> implementation has demonstrated wide applicability to many writers,
> and may be used directly in most circumstances. It has been used to
> implement a full-featured World Wide Web browser." <-- huh?

The web browser in question was called "Grail".  Grail has been
resting for some time now.  By today's standards, "full-featured" is a
bit of a stretch.

But I wouldn't worry too much about what they're trying to say there
yet (it has to do with the way the formatter.AbstractFormatter class
is structured, not what it actually does "out of the box").


> So.. What is dumbwriter and abstractformatter doing with this HTML and
> why does it need to be done before parser.feed() gets a hold of it?

The "heavy lifting" only really actually starts happening when you
call parser.feed().  Before that, you're just setting the stage.


> The last question is..   I can't find any documentation to explain
> where the "anchorlist" attribute came from?   Here is the only
> reference to this attribute that I can find anywhere in the Python
> documentation.
>
> ----------------------
> anchor_bgn(  	href, name, type)
>     This method is called at the start of an anchor region. The
> arguments correspond to the attributes of the <A> tag with the same
> names. The default implementation maintains a list of hyperlinks
> (defined by the HREF attribute for <A> tags) within the document. The
> list of hyperlinks is available as the data attribute anchorlist.
> ----------------------

That is indeed the (only) documentation for .anchorlist .  What more
were you expecting to see?


> So ..  How does an average developer figure out that parser returns a
> list of hyperlinks in an attribute called anchorlist?  Is this

They keep the Library Reference under their pillow :-)

And strictly it doesn't *return* a list of links.  And that's
certainly not HTMLParser's main function in life.  It merely makes
such a list available as a convenience.  In fact, many people instead
use module sgmllib, which provides no such convenience, but otherwise
does the same parsing work as module htmllib.


> something that you just "figure out" or is there some book I should be
> reading that documents all of the attributes for a particular
> method?   It just seems a bit obscure and certainly not something I
> would have figured out on my own.  Does this make me a poor developer
> who should find another hobby?   I just need to know if there is
> something wrong with me or if this is a reasonable question to ask.

But you *did* figure it out.  How else is it that you come to be
explaining it to us?

Keep in mind that *nobody* knows all of the standard library.  I've
been writing Python code full time for years, and I often bump into
whole standard library modules whose existence I'd forgotten about, or
was never really aware of in the first place.  The more you know about
what it can do, the more convenience you'll get out of it, is all.


> The last question I have is about debugging.   The spider is capable
> of parsing links until it reaches:
>
> "html = get_page(http://www.google.com/jobs/fortune)" which returns
> the contents of a pdf document, assigns the pdf contents to html which
> is later passed to parser.feed(html) which crashes.
[...]
> How would an experienced python developer check the contents of "html"
> to make sure its not something else other than a blob of HTML code?  I
> should note an obviously catch-22..   How do I check the HTML in such
> a way that the check itself doesn't possibly crash the app?  I thought
> about:
>
> try:
>     parser.feed(html)
> except parser.HTMLParseError:
>     parser.close()
>
>
> .... but i'm not sure if that is right or not?  The app still crashes
> so obviously i'm doing something wrong.

That kind of idea is often the best way.  In this case, though, you
probably want to do an up-front check by looking at the HTTP
Content-Type header (Google for it), something like this:

response = urllib2.urlopen(url)
html = response.read()
if response.info()["Content-Type"] == "text/html":
    parse(html)


John


From software at ginstrom.com  Sun Aug 26 21:00:42 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Mon, 27 Aug 2007 10:00:42 +0900
Subject: Using Regular Expresions to change .htm to .php in files
In-Reply-To: <pan.2007.08.26.10.23.05@mailinator.com>
References: <1187896823.843419.53220@q3g2000prf.googlegroups.com><46cdd386$0$27392$88260bb3@free.teranews.com>
	<pan.2007.08.26.10.23.05@mailinator.com>
Message-ID: <008101c7e845$b12b4960$020ba8c0@MOUSE>

> On Behalf Of Mark
> This line should be:
> 
> sed "s/\.htm$/.php/g" < $each > /tmp/$$

I think a more robust way to go about this would be:

(1) Use os.walk to walk through the directory
   http://docs.python.org/lib/os-file-dir.html

(2) Use Beautiful Soup to extract the internal links from each file
   http://crummy.com/software/BeautifulSoup/documentation.html

from BeautifulSoup import BeautifulSoup

soup = BeautifulSoup(doc)
links = soup('a')
internal_links = [link["href"]
                        for link in links
                        if link.has_key("href") and not
link["href"].startswith("http")]

(4) Do straight string replacements on those links (no regex needed)

(5) Save each html file to *.html.bak before changing


Regards,
Ryan Ginstrom



From bdesth.quelquechose at free.quelquepart.fr  Thu Aug 30 06:56:19 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 30 Aug 2007 12:56:19 +0200
Subject: Python doesn't see the directories I create
In-Reply-To: <5jns3vFdmbcU6@mid.uni-berlin.de>
References: <ldvBi.293202$LE1.92748@newsfe13.lga>	<46d6856b$0$17674$426a74cc@news.free.fr>	<mailman.133.1188471584.28954.python-list@python.org>	<46d6a72c$0$20532$426a74cc@news.free.fr>	<mailman.134.1188473377.28954.python-list@python.org>
	<5jns3vFdmbcU6@mid.uni-berlin.de>
Message-ID: <46d7405e$0$421$426a74cc@news.free.fr>

Marc 'BlackJack' Rintsch a ?crit :
> On Thu, 30 Aug 2007 07:28:52 -0400, Steve Holden wrote:
> 
> 
>>Bruno Desthuilliers wrote:
>>
>>>Steve Holden a ?crit :
>>>Indeed. But I doubt a path starting with 'C:' will work fine on a 
>>>unix-like environment anyway !-)
>>
>>Just to be contrarian:
>>
>>sholden at bigboy ~/Projects/python.org/build
>>$ ls C:/Steve/
>>Apache                          SANSsecurityOverview.pdf
>>Apache2                         SQLServer.txt
>>     ...
>>Resume.odt                      todo.txt
>>Resume.pdf                      untitled-1.py
>>
>>sholden at bigboy ~/Projects/python.org/build
>>
>>That's Cygwin, of course. Is that sufficiently "unix-like"? Though I 
>>have to admit that the different utilities all take different approaches 
>>to the use of Windows paths, and some just won't take them at all.
> 
> Even on Unix it shouldn't be a problem on most file systems to create a
> directory named 'C:'
> 
> bj at s8n:~$ mkdir C:
> bj at s8n:~$ touch C:/test.txt
> bj at s8n:~$ ls -l C:
> total 0
> -rw-r--r-- 1 bj bj 0 2007-08-30 14:38 test.txt
> 
> :-)

Ok, I get it, you guys are trying to make me mad !-)


From DustanGroups at gmail.com  Sun Aug 12 20:39:29 2007
From: DustanGroups at gmail.com (Dustan)
Date: Mon, 13 Aug 2007 00:39:29 -0000
Subject: Complexity of methods etc
In-Reply-To: <mailman.1892.1186963490.22759.python-list@python.org>
References: <mailman.1892.1186963490.22759.python-list@python.org>
Message-ID: <1186965569.076575.288090@l70g2000hse.googlegroups.com>

On Aug 12, 7:04 pm, "Nathan Harmston" <ratchetg... at googlemail.com>
wrote:
> Hi,
>
> I was wondering if anyone knew of any resources, where I might be able
> to find information about the complexity of certain python functions
> or little tips on how to reduce complexity. I mean like the "".join(),
> kind of thing?
>
> I want to see if there are any improvements I can add to my coding in
> order to reduce  time/space usage/

It's really difficult to understand what you mean. If you're looking
for a reference on the functions that are available in the library,
you have a long journey ahead of you at http://docs.python.org/ .



From ptmcg at austin.rr.com  Mon Aug 20 11:54:55 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 20 Aug 2007 08:54:55 -0700
Subject: regular expression dictionary search
In-Reply-To: <mailman.25.1187624159.26576.python-list@python.org>
References: <d6a0d8f10708181139m730d7aa6t1c9f6e624d6db9aa@mail.gmail.com>
	<mailman.25.1187624159.26576.python-list@python.org>
Message-ID: <1187625295.287653.137080@r34g2000hsd.googlegroups.com>

On Aug 20, 10:35 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> #!/usr/bin/env python
<snip>
> if __name__ == "__main__":
>
>     print "The return for 'fred' : %s" % returnCode('fred')
>     print "The return for 'silk' : %s" % returnCode('silk')
>     print "The return for 'silky' : %s" % returnCode('silky')
>     print "The return for 'hand' : %s" % returnCode('hand')
>     print "The return for 'strand' : %s" % returnCode('strand')
>     print "The return for 'bank' : %s" % returnCode('bank')
>

Shawn -

All that copy/pasting has got to have carpal tunnel written all over
it - DRY!

tests = "fred silk silky hand strand bank".split()
for test in tests:
    print "The return for '%s' : %s" % (test, returnCode(test))

-- Paul



From kyosohma at gmail.com  Wed Aug 15 12:07:16 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 15 Aug 2007 09:07:16 -0700
Subject: moving files in a seperate thread (and/or with progress?)
In-Reply-To: <mailman.1999.1187170117.22759.python-list@python.org>
References: <mailman.1999.1187170117.22759.python-list@python.org>
Message-ID: <1187194036.856068.323750@j4g2000prf.googlegroups.com>

On Aug 15, 4:28 am, "Jorgen Bodde" <jorgen.maill... at gmail.com> wrote:
> Hi all,
>
> I want to make a small batch copy tool that scans for certain files,
> and copies them to a specified directory. Since the files are huge
> (AVI / DIVX) typical 300 to 700 Mb, I want to provide the user with
> some feedback during the file copy.
>
> Here is my dillemma; When I use shutil.move(..,..) I have to wait
> until it's done, there is no feedback, so the GUI basically hangs.
> However, shutil.move can be fast because it intelligently renames the
> file when it is on the same medium, but slow when it moves to a
> different one.
> When I use my own implementation of a move mechanism that provides
> feedback, I lose that intelligence, and I might slow down the copy
> process unneccessarily.
>
> When I move files, feedback is handy to have, but not neccesary so I
> thought I can also call shutil.move from a seperate thread so the main
> GUI stays responsive. What are my options in aborting a move by
> killing the thread or are there other (3rdparty) modules I might use
> to get better move or copy performances?
>
> Just opening the file, performing a block copy myself seems like it
> will slow down the transfer, but up until now I found no way to move
> or copy with progress or abilities to abort the file transfer..
>
> Any ideas?
>
> Regards,
> - Jorgen

What GUI toolkit are you using? I know that wxPython has a status
widget that could be updated in a thread and it has some good examples
of using threads with long running tasks. I created a program with it
that deletes folders and updates me on its progress.

You can see the wxPython implementation here: http://wiki.wxpython.org/LongRunningTasks

Their widget is called a ProgressDialog. I think there's a custom one
too...

Mike



From arkanes at gmail.com  Tue Aug 21 15:45:17 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 21 Aug 2007 14:45:17 -0500
Subject: Python Path Dictionary
In-Reply-To: <1187723618.729114.19020@19g2000hsx.googlegroups.com>
References: <1187706985.476483.292820@g4g2000hsf.googlegroups.com>
	<mailman.66.1187710972.32294.python-list@python.org>
	<1187723618.729114.19020@19g2000hsx.googlegroups.com>
Message-ID: <4866bea60708211245h655475b1gd7f2f2832898c376@mail.gmail.com>

On 8/21/07, aine_canby at yahoo.com <aine_canby at yahoo.com> wrote:
> On 21 Aug, 17:42, Gary Herron <gher... at islandtraining.com> wrote:
> > aine_ca... at yahoo.com wrote:
> > > Hi,
> >
> > > Do the Python Paths come in the form of a dictionary where I can
> > > access a particular path my its key in the registry?
> >
> > > For example, in PythonWin Tools>>Edit Python Paths shows the name as
> > > well of the address of each path
> >
> > > Thanks,
> >
> > > Aine
> >
> > If by "Python Paths" you mean the list of directories searched when
> > doing an import, then it is a list (not a dictionary and you can access
> > it as sys.path.
> >
> > Here it is on both my Linux and Windows systems:
> >
> > >>> import sys
> > >>> sys.path
> >
> > ['', '/usr/lib/portage/pym', '/usr/lib/python25.zip',
> > '/usr/lib/python2.5', '/usr/lib/python2.5/plat-linux2',
> > '/usr/lib/python2.5/lib-tk', '/usr/lib/python2.5/lib-dynload',
> > '/usr/lib/python2.5/site-packages',
> > '/usr/lib/python2.5/site-packages/Numeric',
> > '/usr/lib/python2.5/site-packages/PIL',
> > '/usr/lib/python2.5/site-packages/gtk-2.0']
> >
> > >>> import sys
> > >>> sys.path
> >
> > ['', 'C:\\WINDOWS\\system32\\python24.zip', 'C:\\cygwin\\home\\Gary',
> > 'c:\\python24\\DLLs', 'c:\\python24\\lib',
> > 'c:\\python24\\lib\\plat-win', 'c:\\python24\\lib\\lib-tk',
> > 'c:\\python24', 'c:\\python24\\lib\\site-packages',
> > 'c:\\python24\\lib\\site-packages\\Numeric',
> > 'c:\\python24\\lib\\site-packages\\PIL',
> > 'c:\\python24\\lib\\site-packages\\gtk-2.0',
> > 'c:\\python24\\lib\\site-packages\\win32',
> > 'c:\\python24\\lib\\site-packages\\win32\\lib',
> > 'c:\\python24\\lib\\site-packages\\Pythonwin']
>
> Thanks.
>
> Yeah, that's exactly what I'm talking about, but I don't want the
> list, I want to access a certain path by name. I'm guessing I'm going
> to have to write a function to do this that reads the value from the
> registry.
>

The elements of the path don't have names - they are a list of
directories. You are mistaking Pythonwins configuration options (like
where it searches for modules) for the python path.

Note that the registry entry "PythonPath" (which is not respected by
Python, but used by Pythonwin to override the default python path) is
a semi-colon separated list, not a series of keys.


From rdm at rcblue.com  Sun Aug 19 17:56:25 2007
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 19 Aug 2007 14:56:25 -0700
Subject: A problem with Time
In-Reply-To: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
References: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <20070819215631.963231E4014@bag.python.org>

At 08:30 AM 8/16/2007, special_dragonfly wrote:
>Hello,
>
>I need to return the date yesterday in the form DDMMYYYY. I looked through
>the modules: time, datetime and calendar but can't find anything that leaps
>out at me.
>
>The problem I'm having is that although I can use time.localtime and get a
>tuple of the year, month, day and so forth, I don't believe I can just minus
>1 from the day, because I don't think it's cyclic, also, I can't see the
>date being linked in with the month.
>
>So is there any way of getting yesterdays date?

The question has already been well-answered, but since I've found 
using the datetime module to be tough going, I was wondering if 
either of these would be easier to understand and use:
1. <http://www.egenix.com/products/python/mxBase/mxDateTime/>
I see that mxDateTime comes with a 55-page manual as a PDF.

2. <http://labix.org/python-dateutil>

Dick Moores






From rhamph at gmail.com  Wed Aug 29 21:23:52 2007
From: rhamph at gmail.com (Adam Olsen)
Date: Wed, 29 Aug 2007 19:23:52 -0600
Subject: Is LOAD_GLOBAL really that slow?
Message-ID: <aac2c7cb0708291823h15e3f675mbeae9ecf37d653b6@mail.gmail.com>

It seems a common opinion that global access is much slower than local
variable access.  However, my benchmarks show a relatively small
difference:

./python -m timeit -r 10 -v -s 'x = [None] * 10000
def foo():
  for i in x:
    list; list; list; list; list; list; list; list; list; list' 'foo()'
10 loops -> 0.0989 secs100 loops -> 0.991 secs
raw times: 0.999 0.985 0.987 0.985 0.985 0.982 0.982 0.982 0.981 0.985
100 loops, best of 10: 9.81 msec per loop

./python -m timeit -r 10 -v -s 'x = [None] * 10000
def foo():
  mylist = list
  for i in x:
    mylist; mylist; mylist; mylist; mylist; mylist; mylist; mylist;
mylist; mylist' 'foo()'
10 loops -> 0.0617 secs
100 loops -> 0.61 secs
raw times: 0.603 0.582 0.582 0.583 0.581 0.583 0.58 0.583 0.584 0.582
100 loops, best of 10: 5.8 msec per loop

So global access is about 70% slower than local variable access.  To
put that in perspective, two local variable accesses will take longer
than a single global variable access.

This is a very extreme benchmark though.  In practice, other overheads
will probably drop the difference to a few percent at most.  Not that
important in my book.

So my question: does somebody have a globals benchmark that shows a
really significant slowdown vs local variables?

-- 
Adam Olsen, aka Rhamphoryncus


From jstroud at mbi.ucla.edu  Fri Aug  3 21:32:54 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 03 Aug 2007 18:32:54 -0700
Subject: How to pass a reference to the current module
In-Reply-To: <mailman.1598.1186190388.22759.python-list@python.org>
References: <f90gsg$ek4$1@zinnia.noc.ucla.edu>	<f90im3$8ms$1@daisy.noc.ucla.edu>
	<mailman.1598.1186190388.22759.python-list@python.org>
Message-ID: <f90l06$hic$2@zinnia.noc.ucla.edu>

Carsten Haese wrote:
> This seems to confirm my suspicion that the do_something_with function
> doesn't actually need a reference to the module, it only needs a
> reference to the function to call.
> 
> Maybe your hurdle is how to obtain a reference to a function from the
> current module when all you have is the name of the function in a
> string. The answer to that would be "globals()[funcname]".

This is like a bad case of phone-tag. Please see my response to your 
previous post for why this does not seem feasible to me.

James


-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From horpner at yahoo.com  Thu Aug  9 09:13:27 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 09 Aug 2007 13:13:27 GMT
Subject: check if regeular expression has results
References: <1186664302.050036.302670@g4g2000hsf.googlegroups.com>
Message-ID: <slrnfbm4vk.194.horpner@FIAD06.norwich.edu>

On 2007-08-09, shahargs at gmail.com <shahargs at gmail.com> wrote:
> Hi,
> I'm looking for the best way to check if regular expression return
> true (it's mean - there is a match). for example, i want "if" that
> check if this regular expression: .*born.*to.* has a match.
>
> What's the way to do that simply?

Newgroups are a poor substitute for the docs. For one thing,
newsgroups sometimes contain cranky people who say, "RTFM!" The
docs will never do that.

-- 
Neil Cerutti


From anno4000 at radom.zrz.tu-berlin.de  Fri Aug 24 07:39:23 2007
From: anno4000 at radom.zrz.tu-berlin.de (anno4000 at radom.zrz.tu-berlin.de)
Date: 24 Aug 2007 11:39:23 GMT
Subject: Regular expression use
References: <famdl6$p9j$1@gemini.csx.cam.ac.uk>
Message-ID: <5j7ubbF3sovufU1@mid.dfncis.de>

Nick Maclaren <nmm1 at cus.cam.ac.uk> wrote in comp.lang.perl.misc:
> 
> For reasons that I won't explain, as they are too complicated
> and not terribly relevant,

Your reasons are relevant as a motivation for your readers to
answer such a broad question.

> I am interested in discovering what
> people actually use regular expressions for.  Not the subject
> domain, but the construction of the regular expressions.

How is the construction of a regex related to what it is used
for?  That makes no sense.

> I know about computer scientists and parsing,

That's a (broad) subject domain.

> and I know about
> the use of relatively simple ones for things like extracting
> HTML links from Web pages.

That's another subject domain (and a regex for that purpose wouldn't
qualify as "relatively simple").

> But I don't have much feel for the
> (probably rare but difficult) uses of more complex ones for
> other purposes.  I have heard of several such uses, but don't
> have an overall idea of what is going on.

Your question is so badly defined, it would take considerable effort
just to make sense of it.  Given your premise of "Never mind what I
need it for, just gimme the info," I won't even try.

Anno


From raims at dot.com  Tue Aug  7 05:53:18 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Tue, 7 Aug 2007 11:53:18 +0200
Subject: get wikipedia source failed (urrlib2)
References: <1186476847.728759.166610@o61g2000hsh.googlegroups.com>
	<1186479277.356613.111630@r34g2000hsd.googlegroups.com>
Message-ID: <1i2h4ye.1jt6b1gh2e7rwN%raims@dot.com>

<shahargs at gmail.com> wrote:
> This source works fine for other site. the problem is in wikipedia. is
> someone now any solution for this problem?

Wikipedia, AFAIK, bans requests without a User Agent.
http://www.voidspace.org.uk/python/articles/urllib2.shtml#headers

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From philippe.martin at att.net  Sun Aug 26 19:54:14 2007
From: philippe.martin at att.net (hg)
Date: Sun, 26 Aug 2007 23:54:14 GMT
Subject: SCF (Python Smar Card Framework)
In-Reply-To: <7x8x7xsws0.fsf@ruckus.brouhaha.com>
References: <7OnAi.21500$eY.10887@newssvr13.news.prodigy.net>
	<7x8x7xsws0.fsf@ruckus.brouhaha.com>
Message-ID: <GooAi.3699$JD.909@newssvr21.news.prodigy.net>

Paul Rubin wrote:
> hg <philippe.martin at att.net> writes:
>> I am releasing much of my work including SCF (Cross platform Smart
>> Card library & Tools) to the GPL license.
>>
>> If interested, go to http://www.SnakeCard.com/Source.html
> 
> Wow, that is great.  I haven't found any low cost programmable cards
> (no large quantity purchases or developer licenses needed) other than
> BasicCard which has some annoying limitations.  Do you have any
> suggestions?  Thanks!
> 

How about you post that on the forum I just opened ... we're going to 
get killed here ;-)

hg


From carsten at uniqsys.com  Fri Aug 31 20:33:17 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 31 Aug 2007 20:33:17 -0400
Subject: Python Unicode to String conversion
In-Reply-To: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
References: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
Message-ID: <1188606797.3221.13.camel@localhost.localdomain>

On Fri, 2007-08-31 at 15:55 -0700, thijs.braem at gmail.com wrote:
> Hi everyone,
> 
> I'm having quite some troubles trying to convert Unicode to String
> (for use in psycopg, which apparently doesn't know how to cope with
> unicode strings).
> 
> The error I keep having is something like this:
> ERREUR:  S?quence d'octets invalide pour le codage ?UTF8? : 0xe02063

I'm guessing that you are passing a latin-1 encoded string and pretend
(or psycopg assumes) incorrectly that it's UTF-8 encoded. In latin-1
encoding, 0xe0 is a small letter a with a grave accent, 0x20 is a space,
and 0x63 is a small letter c. While this is a perfectly valid latin-1
encoded character string, it doesn't represent a valid UTF-8 encoded
character string.

It seems that you need to pass a UTF-8 encoded string to the database.
To give you specific advice on how to do that, we'd have to see your
code. For now, I'll give you the generic advice of taking a look at
http://www.amk.ca/python/howto/unicode .

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From nawijn at gmail.com  Wed Aug 29 08:09:35 2007
From: nawijn at gmail.com (Marco Nawijn)
Date: Wed, 29 Aug 2007 05:09:35 -0700
Subject: Code design problem
Message-ID: <1188389375.238847.298320@w3g2000hsg.googlegroups.com>

Hello,

I have a hard time figuring out an elegant and efficient design for
the following problem.

I am working on automation of structural design problems. In the
majority of cases, this boils down to executing programs in batch in
one or more loops. The scripts to control the execution differ from
fortran to bash to python and so on. Most of them are ad hoc and what
I call 'throw away scripts'. In order to improve the situation I would
like to develop a Python module that supports the execution of
external programs. Ideally I would like to make running locally or
remote trivial for the users of the module. As an example, I would
like the following (pseudo)-code to work:

app = Application('patran')                        # Run on local
machine
app.start(args)


app = Application('patran', host='myhost')   # Run on remote machine
app.start(args)

The problem I face is that the implementation of the application class
is completely
different for the local and remote case. The local case is a
straightforward implemenation using the subprocess module, the remote
case is a CORBA implementation. Somehow I would like to switch from
implementation class at runtime depending on whether or not the host
parameter is specified or not.

The Application, local implementation and remote implementation all
have the same interface, so a possibility might be something like the
following:

class Interface(object):
     .....
     def start(self): pass
     def stop(self): pass

class LocalImplementation(Interface):
       .....

class GlobalImplementation(CorbaGlobalImplementation, Interface):
       .....


class Application(Interface):

      def __init__(self, program, host=None):
            ....
            if host:
                   self.__impl = LocalImplementation(program)
            else:
                   self.__impl = GlobalImplementation(program, host)

      #  Forward all methods to the implementation class
      def start(self):
          self.__impl.start()

      def stop(self):
          self.__impl.stop()


To me forwarding each call in the Application class looks a little bit
redundant and I would like to get rid of it. Does anyone have any
comments or suggestions? Can metaclass programming come to rescue?

Kind regards,


Marco Nawijn



From jcd at sdf.lonestar.org  Fri Aug 24 15:20:56 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 24 Aug 2007 15:20:56 -0400
Subject: How to replace a method in an instance.
In-Reply-To: <alpine.LFD.0.999.0708241254420.30194@saturn.syslang.net>
References: <mailman.258.1187971369.32294.python-list@python.org>	<1187971953.261328.219000@q3g2000prf.googlegroups.com>	<alpine.LFD.0.999.0708241223480.30194@saturn.syslang.net>
	<alpine.LFD.0.999.0708241254420.30194@saturn.syslang.net>
Message-ID: <46CF2F98.8020000@sdf.lonestar.org>

Steven W. Orr wrote:
> On Friday, Aug 24th 2007 at 12:26 -0400, quoth Steven W. Orr:
>
> =>On Friday, Aug 24th 2007 at 09:12 -0700, quoth kyosohma at gmail.com:
> =>
> =>=>On Aug 24, 11:02 am, "Steven W. Orr" <ste... at syslang.net> wrote:
> =>=>> In the program below, I want this instance to end up calling repmeth
> =>=>> whenever inst.m1 is called. As it is now, I get this error:
> =>=>>
> =>=>> Hello from init
> =>=>> inst =  <__main__.CC instance at 0x402105ec>
> =>=>> Traceback (most recent call last):
> =>=>>    File "./foo9.py", line 17, in ?
> =>=>>      inst.m1()
> =>=>> TypeError: repmeth() takes exactly 1 argument (0 given)
> =>=>>
> =>=>> #! /usr/bin/python
> =>=>> def repmeth( self ):
> =>=>>      print "repmeth"
> =>=>>
> =>=>> class CC:
> =>=>>      def __init__( self ):
> =>=>>          self.m1 = repmeth
> =>=>>          print 'Hello from init'
> =>=>>
> =>=>>      def m1 ( self ):
> =>=>>          print "m1"
> =>=>>
> =>=>> inst = CC()
> =>=>> inst.m1()
> =>
> =>=>Remove "self" from repmeth as it's not required in a function, only in
> =>=>functions that are defined within a class. Of course, a function in a
> =>=>class is also know as a method.
> =>
> =>Sorry. I need repmeth to have self passed to it automatically if it's 
> =>called. I didn't mean to obfuscate the problem by not making a reference 
> =>to self in repmeth. 
> =>
> =>Am I being clear?
>
> On Friday, Aug 24th 2007 at 18:44 +0200, quoth Wildemar Wildenburger:
>
> =>Steven W. Orr wrote:
> =>> Sorry. I need repmeth to have self passed to it automatically if it's
> =>> called. I didn't mean to obfuscate the problem by not making a 
> reference
> =>> to self in repmeth.
> =>>
> =>> Am I being clear?
> =>>
> =>>
> =>Sort of. Maybe you fare better if you state what you want to achieve,
> =>instead of how you think you should do it. Chances are you don't need to
> =>replace a method in __init__, but there's another, less tricky way.
>   
> Ok. I have a collection of classes that are produced by a factory. They   
> all inherit from a baseclass. One (maybe more) of the classes inherits a  
> method that he shouldn't. All I want is to be able to change that
> particular class so that he will have the special method that he needs    
> instead of the default one that he inherits. I was thinking that instead 
> of making a special class for CC to inherit from which would give him his 
> special replacement method(s), I could simply assign them in a manner 
> which would more easily lend itself to later being table driven.
>
> If I had a choice, I'd rather not do it in init. Instead, I'd rather be 
> able to say something like 
> CC.m1 = repmeth
> but since in the real world, CC inherits from his baseclass, the above 
> assignment causes the baseclass to be altered. :-(
>
> Please tell me if I need to provide more.
>
>   
Is there a reason you don't just create a subclass for the one that 
needs to call repmeth?

class CC(object):
    def m1(self):
       print "m1"
    def m2(self):
       print "m2"

class SpecialCC(CC):
    def m1(self):
       print "something else!"

if __name__ == '__main__':
    a = CC()
    b = SpecialCC()
    for instance in a, b:
        instance.m1()
        instance.m2()

--Output--
m1
m2
something else!
m2


Is that what you're looking for, mas o menos?

Cheers,
Cliff 


From msherman77 at yahoo.com  Wed Aug 22 17:51:35 2007
From: msherman77 at yahoo.com (Michael S)
Date: Wed, 22 Aug 2007 17:51:35 -0400 (EDT)
Subject: Python for web development ...
In-Reply-To: <1187799217.054726.109380@z24g2000prh.googlegroups.com>
Message-ID: <796330.18826.qm@web88303.mail.re4.yahoo.com>

Check out http://www.modpython.org/, you can also use
python with CGI
http://docs.python.org/lib/module-cgi.html
or fastcgi 
http://www.fastcgi.com/

--- thushianthan15 at gmail.com wrote:

> 
> Hi everyone,
> 
> I have to do a web based application for my final
> year project. Since,
> i am only familiar with basic HTML and Java Script,
> i am totally new
> to this one. My friends are using LAMP (P->PHP). But
> i want to use
> Python. Is it possible to use Python with Apache and
> MySQL. Is it
> possible ? Any websites/books ?
> 
> Thank you
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From aahz at pythoncraft.com  Sat Aug 11 10:36:59 2007
From: aahz at pythoncraft.com (Aahz)
Date: 11 Aug 2007 07:36:59 -0700
Subject: Augmented assignment (was Re: Something in the function tutorial
	confused me.)
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<m3hvi.37606$G23.6240@newsreading01.news.tds.net>
	<f9kdpq$drp$1@panix3.panix.com>
	<bAjvi.47120$wv5.1434653@phobos.telenet-ops.be>
Message-ID: <f9khib$kvq$1@panix3.panix.com>

In article <bAjvi.47120$wv5.1434653 at phobos.telenet-ops.be>,
Roel Schroeven  <rschroev_nospam_ml at fastmail.fm> wrote:
>Aahz schreef:
>> 
>> Although Alex is essentially correct, the situation is a bit more complex
>> and you are correct that augmented assignment allows the object to decide
>> whether to mutate in place.  However, the critical part of Alex's point
>> is what you need to focus on: it's the *tuple* in Alex's example that
>> intercepts the assignment call, not the list contained in the tuple.
>> 
>> Obviously, you can easily work around it:
>> 
>>>>> t = ([],)
>>>>> l = t[0]
>>>>> l += ['foo']
>>>>> t
>> (['foo'],)
>
>I'm missing something here, I think. As far as I can tell, the language 
>reference says that the target is evaluated before the augmented 
>assignment is performed. If that's the case, I don't see how the tuple 
>in Alex' example has anything to with it: the assignment is to the list, 
>not the tuple.
>
>And watch this (Python 2.4.2):
>
> >>> tup = ([],)
> >>> tup[0] += ['zap']
>
>Traceback (most recent call last):
>   File "<pyshell#10>", line 1, in -toplevel-
>     tup[0] += ['zap']
>TypeError: object does not support item assignment
>
>So far that's the same as Alex' example, but look at the value of the 
>tuple now:
>
> >>> tup
>(['zap'],)
>
>Despite the TypeError, the list *has* changed.

Yup!  Here's why:

>>> def foo(bar): bar[0] += ['zap']
... 
>>> import dis
>>> dis.dis(foo)
  1           0 LOAD_FAST                0 (bar)
              3 LOAD_CONST               1 (0)
              6 DUP_TOPX                 2
              9 BINARY_SUBSCR       
             10 LOAD_CONST               2 ('zap')
             13 BUILD_LIST               1
             16 INPLACE_ADD         
             17 ROT_THREE           
             18 STORE_SUBSCR        
             19 LOAD_CONST               0 (None)
             22 RETURN_VALUE        

Notice the critical sequence: BINARY_SUBSCR, INPLACE_ADD, STORE_SUBSCR.
It has to work that way to allow this:

>>> l = [7]
>>> l[0] += 1
>>> l
[8]

There's simply no way to get augmented assignment to work correctly with
both lists and tuples when you allow both mutable and immutable elements.
Someone will always get surprised, and overall with strings and numbers
being the canonical list elements, I think making augmented assignment
work correctly with lists and immutables was the best decision.

But the unfortunate side-effect is that you get the TypeError with
augmented assignment in tuples only after the mutation has been done.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"And if that makes me an elitist...I couldn't be happier."  --JMS


From Shawn at Milochik.com  Fri Aug 17 14:29:03 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Fri, 17 Aug 2007 14:29:03 -0400
Subject: question
In-Reply-To: <1187373737.410546.70930@w3g2000hsg.googlegroups.com>
References: <1187373737.410546.70930@w3g2000hsg.googlegroups.com>
Message-ID: <2dc0c81b0708171129m284b4940l30f5dec01e7b52c1@mail.gmail.com>

You need to post some kind of code (even non-working) to show that
you've actually done some work. Nobody will do your work for you.


From stargaming at gmail.com  Mon Aug  6 04:43:53 2007
From: stargaming at gmail.com (Stargaming)
Date: 06 Aug 2007 08:43:53 GMT
Subject: Something in the function tutorial confused me.
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
Message-ID: <46b6df49$0$26165$9b622d9e@news.freenet.de>

On Sun, 05 Aug 2007 23:50:24 -0700, Lee Fleming wrote:

> Hello,
> I have a simple question. Say you have the following function:
> 
> def f(x, y = []):
>     y.append(x)
>     return y
> 
> print f(23)  # prints [23]
> print f(42)  # prints [23, 42]
> 
> As far as I understand, the default value y, an empty list, is created
> when the def statement evaluates. With this thought in mind, the above
> calls
> to f make sense.
> 
> But this, the code that "fixes" the list accumulation confounds me: def 
> f(x, y=None):
>     if y is None: y = []
>     y.append(x)
>     return y
> 
> print f(23)  # prints [23]
> print f(42)  # prints [42]
> 
> Why didn't the second call to f, f(42) return [23, 42]? As I understand
> it, y is only None at the beginning of f(23). Then y changes from None
> to 23. When f ends, doesn't y still have 23 in it,
> just as it did in the first function I discussed? And if y has 23 in it,
> won't the second call to f not execute what's in the if statement?
> 
> In other words, what's going on here? How is it that y accumulates
> argument values between function calls in the first function, but
> doesn't in the second one?

You're just unluckily shadowing the name `y` in the local scope of your 
function. Your code snippet could be rewritten as::

  def f(x, y=None):
    if y is None: my_y = []
    else: my_y = y
    my_y.append(x)
    return my_y

HTH,
Stargaming


From richyjsm at gmail.com  Wed Aug  8 20:43:02 2007
From: richyjsm at gmail.com (richyjsm at gmail.com)
Date: Thu, 09 Aug 2007 00:43:02 -0000
Subject: what's the point of pow()?
Message-ID: <1186620182.116846.327350@57g2000hsv.googlegroups.com>

it's a serious question:  why does the builtin pow function exist?

for two argument pow we've got **.  there's no add() for + or mul()
for *....

and three argument pow-with-modulo seems like specilaist usage that
belongs in the standard lib, not in the core.  I know about crypto and
number theory uses.  are there others?

it's obviously useful for something or else it would be slated for
removal in python 3000, surely?

Richard



From robert.kern at gmail.com  Mon Aug 20 15:41:53 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 20 Aug 2007 14:41:53 -0500
Subject: Mouse control with ctypes in OS X
In-Reply-To: <facpo6$6h3$1@sea.gmane.org>
References: <20070820135358.0B3052303D@atmail.b-one.net>	<46C9CECC.6010401@ulmcnett.com>
	<facpo6$6h3$1@sea.gmane.org>
Message-ID: <facqq2$90l$2@sea.gmane.org>

Robert Kern wrote:
> Googling around a bit more, however, I see that the Quartz Event Services is
> documented and provides similar functionality. The DarwiinRemote project has a
> mouse emulation mode for the Nintendo Wii controller that uses this API. It's
> only available in OSX 10.4, however.

Apologies for the self-response, but reading the docs more I see that
CGPostMouseEvent(), the most relevant function in the API, has been available
since 10.0. Sweet. That's just what I've been looking for, too.

-- 
Robert Kern

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



From david at asdf.asdf  Mon Aug 27 01:21:37 2007
From: david at asdf.asdf (bambam)
Date: Mon, 27 Aug 2007 15:21:37 +1000
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csi2tn49esmc3@corp.supernews.com>
	<mailman.230.1187928865.32294.python-list@python.org>
	<13csqk47j0c56b0@corp.supernews.com>
	<CqSdnRl2x8928FPbnZ2dnUVZ_jSdnZ2d@speakeasy.net>
	<13ct7v3qn2v5206@corp.supernews.com>
	<mailman.238.1187948359.32294.python-list@python.org>
	<13d49lk6ue2as6d@corp.supernews.com>
	<13d4hutad1dq699@corp.supernews.com>
	<1i3h176.kjfosu1ly2afyN%aleax@mac.com>
Message-ID: <13d4nr2b3sfm233@corp.supernews.com>

Thank you.

Steve.

"Alex Martelli" <aleax at mac.com> wrote in message 
news:1i3h176.kjfosu1ly2afyN%aleax at mac.com...
> bambam <david at asdf.asdf> wrote:
>
>> Is it safe to write
>>
>> A = [x for x in A if x in U]
>>
>> or is that undefined? I understand that the slice operation
>
> It's perfectly safe and well-defined, as the assignment rebinds the LHS
> name only AFTER the RHS list comprehension is done.
>
>
> Alex 




From wolf_tracks at invalid.com  Thu Aug 23 07:30:26 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Thu, 23 Aug 2007 04:30:26 -0700
Subject: Baby Steps, optionDB
In-Reply-To: <1187862216.183609.89810@r23g2000prd.googlegroups.com>
References: <Uk7zi.1531$vU4.979@nlpi068.nbdc.sbc.com>
	<1187862216.183609.89810@r23g2000prd.googlegroups.com>
Message-ID: <Pcezi.6450$924.6108@newssvr23.news.prodigy.net>

That got things moving. Thanks. It looks like I have some typos to deal with 
now. I used to program in C++, and there's one thing I've never liked about 
OOP. Too much typing!

Padraig wrote:
> On Aug 23, 4:41 am, "W. Watson" <wolf_tra... at invalid.com> wrote:
>> root.option_readfile('optionDB')
> 
> Just leave out the line which tries to read in the non-existent config
> file...
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From __peter__ at web.de  Fri Aug 17 14:23:32 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 17 Aug 2007 20:23:32 +0200
Subject: Making a copy (not reference) of a file handle,
	or starting stdin over at line 0
References: <mailman.2115.1187372888.22759.python-list@python.org>
Message-ID: <fa4p36$5gj$02$1@news.t-online.com>

Shawn Milochik wrote:

> How can I check a line (or two) from my input file (or stdin stream)
> and still be able to process all the records with my function?

One way:

from itertools import chain
firstline = instream.next()
head = [firstline]

# loop over entire file
for line in chain(head, instream):
    process(line)


You can of course read more than one line as long as you append it to the
head list. Here's an alternative:

from itertools import tee
a, b = tee(instream)

for line in a:
    # determine file format,
    # break when done

# this is crucial for memory efficiency
# but may have no effect in implementations
# other than CPython
del a 

# loop over entire file
for line in b:
    # process line


Peter



From tomtim20 at gmail.com  Fri Aug 24 03:53:16 2007
From: tomtim20 at gmail.com (tomtim20 at gmail.com)
Date: Fri, 24 Aug 2007 00:53:16 -0700
Subject: Unequal Length Maze
Message-ID: <1187941996.333191.323540@z24g2000prh.googlegroups.com>

Hi All,
what's the best algorithm to solve such problem ?
http://www.stetson.edu/~efriedma/unequal/

I will really appreciate some pieces of code (python).


Thanks,
 Tommy



From vedrandekovic at v-programs.com  Mon Aug 20 05:32:17 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Mon, 20 Aug 2007 02:32:17 -0700
Subject: building exe from script
Message-ID: <1187602337.366419.92930@r29g2000hsg.googlegroups.com>

Hello,

Is there any solution for building exe file from python script
something like bbfreeze.When user write some script in
my program, it must compile script into exe without opening console
( cmd ).I'am working on Windows XP  SP2 and Python 2.5.



Regards,
Vedran



From kyosohma at gmail.com  Mon Aug 20 11:06:30 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 20 Aug 2007 08:06:30 -0700
Subject: Newbee Question
In-Reply-To: <mailman.19.1187621934.26576.python-list@python.org>
References: <mailman.15.1187620149.26576.python-list@python.org>
	<1187621470.484615.7010@i13g2000prf.googlegroups.com>
	<mailman.19.1187621934.26576.python-list@python.org>
Message-ID: <1187622390.854759.162320@q3g2000prf.googlegroups.com>

On Aug 20, 9:58 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> On 8/20/07, kyoso... at gmail.com <kyoso... at gmail.com> wrote:
>
>
>
> > On Aug 20, 9:23 am, "HD1956" <hd7... at hotmail.com> wrote:
> > > This is probably a simple code. I am a truck driver who gets paid by
> > > stops and cases. I am trying to figure out how to code my stop pay. I
> > > get 40 cents per stop up to 22 stops, and $1.40 per stops after that.
>
> > def calc(num):
> >         if num < 23:
> >                 return 0.4 * num
> >         else:
> >                 overtime = num - 22
> >                 x = 0.4 * 22
> >                 x += overtime * 1.4
> >                 return x
>
> > # Use your own brain next time
>
> > Mike
>
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> Mike,
>
> I wonder if we were both just duped into helping someone with their homework...
>
> Shawn

I like to write code, so it's not a big deal when it's something so
simple. Still, that is beyond dumb! Nice code, by the way.

Mike



From aboudouvas at panafonet.gr  Tue Aug 21 08:23:19 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Tue, 21 Aug 2007 05:23:19 -0700
Subject: IDE for Python
In-Reply-To: <mailman.55.1187690455.32294.python-list@python.org>
References: <mailman.55.1187690455.32294.python-list@python.org>
Message-ID: <1187698999.545439.322600@k79g2000hse.googlegroups.com>

On Aug 21, 12:00 pm, Joel Andres Granados <joel.grana... at gmail.com>
wrote:
> Hello list:
>
> I have tried various times to use an IDE for python put have always been
> disapointed.


I have also tried a lot of them (IDEs) in the last year. I was finally
happy with Eclipse/Pydev but i was always wanted a more "true" IDE for
Python.
I think i found it in Eric4 http://www.die-offenbachs.de/eric/index.html
You can download from here http://www.riverbankcomputing.co.uk/pyqt/download.php
(binary installer for Windows that contains Eric and PyQt)
and have a look at it!



From sjmachin at lexicon.net  Mon Aug 27 18:06:33 2007
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 27 Aug 2007 15:06:33 -0700
Subject: my parser.py isn't imported
In-Reply-To: <fau5l8$o0i$1@lust.ihug.co.nz>
References: <874pimqpei.fsf@wilson.homeunix.com>
	<1188166462.066732.123620@i13g2000prf.googlegroups.com>
	<87ps19q5fs.fsf@wilson.homeunix.com> <fau5l8$o0i$1@lust.ihug.co.nz>
Message-ID: <1188252393.684357.77710@q3g2000prf.googlegroups.com>

On Aug 27, 7:33 pm, Lawrence D'Oliveiro <l... at geek-
central.gen.new_zealand> wrote:
> In message <87ps19q5fs.... at wilson.homeunix.com>, Torsten Bronger wrote:
>
> > So I'd like to know a means to tell *explicitly* what I want to
> > import.  Maybe I could use the imp module but that's ugly.
>
> That seems to be the standard Python-provided way to explicitly import the
> file you want from the place you want.
>
> > I mean, there are hundreds of modules on my harddisk, so trying to avoid
> > nameclashs should not be the solution...
>
> That is what namespace qualifiers are for, e.g.
>
>     import my_custom_stuff.parser
>
> versus
>
>     import parser
>
> > John Machin writes:
>
> >> 2. Failure to RTFabulousM:
> >> """
> >> Details of the module searching and loading process are
> >> implementation and platform specific. It generally involves
> >> searching for a ``built- in'' module with the given name and then
> >> searching a list of locations given as sys.path.
> >> """
>
> > ... the whole systems seems largely arbitrary, which I don't
> > believe.  ;-)
>
> The documentation <http://docs.python.org/lib/module-sys.html> says quite
> clearly that the search order is controlled by sys.path. So why not
> manipulate that to get the effect you want?

Short answer: it doesn't work. The documentation that I quoted
previously says that if a module is is built in, it will be selected,
*before* sys.path is examined. The OP's original message stated quite
clearly that the directory containing his own parser.py is at the
front of sys.path.

>
> > "parser" is built-in on Windows but not on Linux.
>
> It is standard on all platforms
> <http://docs.python.org/lib/module-parser.html>.

"standard" != "builtin"




From jehugaleahsa at gmail.com  Sun Aug  5 12:43:24 2007
From: jehugaleahsa at gmail.com (jehugaleahsa at gmail.com)
Date: Sun, 05 Aug 2007 16:43:24 -0000
Subject: the one python book
In-Reply-To: <mailman.1611.1186233912.22759.python-list@python.org>
References: <mailman.1611.1186233912.22759.python-list@python.org>
Message-ID: <1186332204.704307.143440@i13g2000prf.googlegroups.com>

On Aug 4, 7:23 am, "dhr" <dima.hris... at gmail.com> wrote:
> newbie question:
>
> Is there a 'K&R" type of Python book? The book that you'd better have on
> your shelf if you are going into Python?

Personally, I have two paths for you to take.

If you are a programmer already, then I would recommend that you buy
Python in a Nutshell. It is actually a very concise book for people
who just want to know what the language provides. I would actually
recommend stopping once you get to the library reference and I would
make sure look into classes. After you done with that day-long read, I
would get your hands on the newest version of "Progamming
Python" (O'Reilly). It has a lot of practical applications for Python
and it is *not* a one-day read. It is enormous and it skips around a
lot. I like it because it is doesn't necessarily stick to one topic so
you pick up a lot of tricks along the way. It gets you started off
learning some sweet c-style OS functions. If you don't know just about
everything about Python by the end of that book, I would be very
surprised.

BTW, almost all of the Nutshell books have been fabulous. They kind of
put it out there for you to suck up like a vacuum. The only failure in
my opinion is the PHP nutshell . . . Since you even know hwo K&R (good
job) is, then I assume you know how to program and are ready to skip
all the crap.

Best of luck,
Travis



From steve at holdenweb.com  Sun Aug  5 10:22:23 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 05 Aug 2007 10:22:23 -0400
Subject: Comparing RFC1123 based Dates
In-Reply-To: <1186281836.970400.103490@i13g2000prf.googlegroups.com>
References: <1186281836.970400.103490@i13g2000prf.googlegroups.com>
Message-ID: <f94mev$dol$1@sea.gmane.org>

Phoe6 wrote:
> I would like to parse RFC 1123 date format and compare two dates. I
> find that
> datetime module does not specifically confirms to any RFC. Any
> suggestions as how I can handle the RFC 1123 date format using
> standard libraries before I go to re based parsing?
> 
I realise you want to stick to the standard library. If you decide you 
can't however, you should definitely take a look at mx.DateTime, as the 
mx.DateTime.ARPA submodule provides exactly what you require.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From van.lindberg at gmail.com  Sat Aug  4 15:45:12 2007
From: van.lindberg at gmail.com (Van Lindberg)
Date: Sat, 04 Aug 2007 14:45:12 -0500
Subject: Trying to find zip codes/rest example
In-Reply-To: <46B4117B.8090002@jayloden.com>
References: <f8vhct$3g6$1@sea.gmane.org> <46B4117B.8090002@jayloden.com>
Message-ID: <46B4D748.6060102@gmail.com>

Jay Loden wrote:
> I don't remember the demo, but a little creative googling turned up
>
> http://bitworking.org/news/132/REST-Tips-URI-space-is-infinite
>
> Which matches the description above perfectly, so I assume it's what you were after :-)
That is exactly what I was trying to find!  I bow down before your 
superior google-fu.

Thanks,

VanL



From soundplay at gmail.com  Sat Aug 18 06:54:35 2007
From: soundplay at gmail.com (SHY)
Date: Sat, 18 Aug 2007 12:54:35 +0200
Subject: passing arguments with ampersands
Message-ID: <f6be0af40708180354u719f5c71p2be27e0ee8317f9b@mail.gmail.com>

 hey,

i have a win32 gui application that accepts filenames as arguments (either
via command line or via associating an extension to the application) which
are then opened in it. the problem is that as soon as the filename contains
characters like '&', the process fails at the very beginning (sys.argv).

for example when the full path of the file im trying to open like this is

Quote:D:\ftp\Music\Mixes & Compilations\Above & Beyond - Essential
Mix\001_Essential_Mix_2004-06-06_-_Above_and_Beyond.txt


when i put 'print sys.argv[1:]' at the very beginning of the script, all i
get is this:

Quote:['D:\\ftp\\Music\\Mixes']



i already have a piece of code that puts together paths with spaces sent via
arguments, but this '&' drives me crazy.

other than that, after i close the application (which actually starts
without any errors), the commands line gets filled with a message like this:


Quote:The system cannot find the path specified.
'Beyond' is not recognized as an internal or external command,
operable program or batch file.



any idea how to solve this? [image: Sad]
thanks in advance!
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From max at alcyone.com  Sun Aug 19 20:42:34 2007
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 19 Aug 2007 17:42:34 -0700
Subject: Python question (PyNoob)
In-Reply-To: <3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d@bt.com>
References: <3uOdnbA4Bc27fFXbnZ2dnUVZ8vidnZ2d@bt.com>
Message-ID: <k_Gdne2qrIfmflXbnZ2dnUVZ_qninZ2d@speakeasy.net>

Anonymous wrote:

> I have exp with C/C++ (and a few other langs). I want to use Python to 
> start doing the ff:
> 
> 1). Data Munging (text processing) - instead of Perl
> 2). Automating my build process
> 3). (Possibly) some web data retrieval jobs
> 
> Can anyone point me to resurces/possibly scripts that can get me up to 
> speed (to do these 3 things) ASAP, without having to learn the basics of 
> programming?

That isn't possible without saying what it is that you actually want done.

Besides, the point of specifically choosing Python here for such tasks 
would be your ability to manipulate them and write your own.  If tools 
already exist that do what you need, which languages they were written 
in would be completely irrelevant.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Never had very much to say / Laugh last, laugh longest
    -- Des'ree


From uymqlp502 at sneakemail.com  Fri Aug 31 01:38:49 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Thu, 30 Aug 2007 22:38:49 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <7xr6lk5m1o.fsf@ruckus.brouhaha.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<m2wsvc1g12.fsf@manolo-blahnik.bibliotech.com>
	<7xr6lk5m1o.fsf@ruckus.brouhaha.com>
Message-ID: <1188538729.605740.41440@q5g2000prf.googlegroups.com>


> I guess one difference from unit test philosophy is > that at least
> sometime, you'd run the entire application with all > the dbc checks
> enabled, and just live with the slowdown.

Yes, that's right. You don't expect to run efficiently with the self-
test checks activated, but you can test your code more conveniently
and comprehensively than unit tests by simply running your program as
usual -- except with the checks activated. If you do that for any
significant period of time, many bugs will find themselves, I'm sure.

Also, to repeat once again, the embedded self-test (DbC) checks can be
used for unit testing too. You simply activate the self-tests when you
do your unit testing, and wait for them to throw exceptions. So it
seems to me that you've killed two birds with one stone.



From david at asdf.asdf  Fri Aug 24 01:20:04 2007
From: david at asdf.asdf (bambam)
Date: Fri, 24 Aug 2007 15:20:04 +1000
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com><1187898049.734696.9500@l22g2000prc.googlegroups.com><13csi2tn49esmc3@corp.supernews.com>
	<mailman.230.1187928865.32294.python-list@python.org>
Message-ID: <13csqk47j0c56b0@corp.supernews.com>

Excellent. By symmetry, I see that "list" casts the set back into a list.

I wonder why list has not been extended with the same (difference,
interesection) methods?  Casting to set looks a little kludgy:

c = list(set(a)-set(b))

I wonder if that is clearer than the explicit loop?

Steve.

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message 
news:mailman.230.1187928865.32294.python-list at python.org...
> En Thu, 23 Aug 2007 23:54:14 -0300, bambam <david at asdf.asdf> escribi?:
>
>> After examining your suggestion, I realised that another thing
>> I am interested in could be generalised: I want the complement
>> of the set of ports in pages, given a universal set in tempList.
>> Ignoring the break condition for the moment, and my problem
>> with int(port)/str(port), would you have offered a different solution
>> if I had asked for the relative complement of a small set?
>>
>> a= ['a','b','c']
>> b= ['b']
>> c= a-b #set theoretic difference, a\b, a.~b, ['a','c']
>
> If you want a set - just use a set:
>
> py> a = set(['a','b','c'])
> py> b = set(['b'])
> py> c = a-b
> py> c
> set(['a', 'c'])
>
> -- 
> Gabriel Genellina
> 




From __peter__ at web.de  Fri Aug 24 01:47:15 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 24 Aug 2007 07:47:15 +0200
Subject: unifying many packages under one name
References: <mailman.231.1187929096.32294.python-list@python.org>
Message-ID: <falrd3$ahe$03$2@news.t-online.com>

Eric S. Johansson wrote:

> I have a collection of packages and I want to put them under single
> unifying
> name.  my goal is to reduce namespace pollution and make all these
> packages accessible as 'import vvv.aaa'. In more detail, if I have
> packages 'aaa' and 'bbb', what do I do to put those packages under
> unifying name such as 'vvv'? the only way I can see to do it is to create
> 'vvv' as a directory with its own __init__.py but I'm not sure that were
> work right either.

Of course you could make a module vvv.py with lots of import statements

import aaa
import bbb
...
import zzz

but then all submodules are imported eagerly with

import vvv

And then there's the hack

import sys

class Importer(object):
    def __getattr__(self, name):
        module = __import__(name) # you can do anything here
        setattr(self, name, module)
        return module

sys.modules["vvv"] = Importer()

Peter


From bdesth.quelquechose at free.quelquepart.fr  Wed Aug  1 14:06:54 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 01 Aug 2007 20:06:54 +0200
Subject: Where do they tech Python officialy ?
In-Reply-To: <mailman.1423.1185957645.22759.python-list@python.org>
References: <1185209574.045112.163780@g4g2000hsf.googlegroups.com>	<7xveca4ajp.fsf@ruckus.brouhaha.com>	<1185265091.276958.239910@r34g2000hsd.googlegroups.com>	<1i23wyk.avc945i4dwsiN%aleax@mac.com>
	<mailman.1423.1185957645.22759.python-list@python.org>
Message-ID: <46b0cbf1$0$5279$426a74cc@news.free.fr>

Alex Popescu a ?crit :
> aleax at mac.com (Alex Martelli) wrote in news:1i23wyk.avc945i4dwsiN%
> aleax at mac.com:
> 
> 
>>NicolasG <nicolasg at gmail.com> wrote:
>>   ...
>>
>>>The problem is that I would like to work as a Python programmer but
>>>all the job vacancies I can find requires a couple of years of
>>>professional experience ... that I don't have. How a wanna be
>>>programmer can start working as a programmer if there is no chance to
>>>start from somewhere ? That's the reason I created this topic.
>>
>>Open source projects do not require previous professional experience 
> 
> to
> 
>>accept volunteers.  So, one way out of your dilemma is to make a name
>>for yourself as an open source contributor -- help out with Python
>>itself and/or with any of the many open source projects that use  
>> Python, 
>>and you will both learn a lot _and_ acquire "professional experience"
>>that any enlightened employer will recognize as such.  
> 
> 
> It depends :-). In my experience I met employers being concerned by my 
> implication in the oss world :-).
> 
These are the ones you don't wan't to work for anyway !-)


From half.italian at gmail.com  Thu Aug  9 21:38:37 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: Fri, 10 Aug 2007 01:38:37 -0000
Subject: Threaded Design Question
In-Reply-To: <1186686575.192491.82820@e16g2000pri.googlegroups.com>
References: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
	<1186686575.192491.82820@e16g2000pri.googlegroups.com>
Message-ID: <1186709917.157105.310050@g12g2000prg.googlegroups.com>

On Aug 9, 12:09 pm, "Justin T." <jmtull... at gmail.com> wrote:
> On Aug 9, 11:25 am, half.ital... at gmail.com wrote:
>
> > Here's how I have it designed so far.  The main thread starts a
> > Watch(threading.Thread) class that loops and searches a directory for
> > files.  It has been passed a Queue.Queue() object (watch_queue), and
> > as it finds new files in the watch folder, it adds the file name to
> > the queue.
>
> > The main thread then grabs an item off the watch_queue, and kicks off
> > processing on that file using another class Worker(threading.thread).
>
> Sounds good.
>
>
>
> > I made definite progress by creating two queues...watch_queue and
> > processing_queue, and then used lists within the classes to store the
> > state of which files are processing/watched.
>
> This sounds ugly, synchronization is one of those evils of
> multithreaded programming that should be avoided if possible. I see a
> couple of dirt simple solutions:
>
> 1. Have the watch thread move the file into a "Processing" folder that
> it doesn't scan
> 2. Have the watch thread copy the file into a python tempfile object
> and push that onto the queue, then delete the real file. This can be
> done efficiently (well, more efficiently than new.write(old.read())
> with shutil.copyfileobj(old, new)
>
> Both those take very few lines of code, don't require synchronization,
> and don't require extending standard classes.

Thanks foor the ideas Justin.

I started subclassing/extending the Queue.Queue object with two
additional classes.  One to return the first item in the list without
removing it from the queue, and one to return all items of the list
without removing them.  I think this will take me to where I want to
go.  If it doesn't work, I might just use your processing folder
approach.  That sounds the easiest, although I'm still interested in
any idioms or other proven approaches for this sort of thing.

~Sean



From ashwin.murali at gmail.com  Wed Aug  1 05:03:59 2007
From: ashwin.murali at gmail.com (The Cruisemaniac)
Date: Wed, 01 Aug 2007 09:03:59 -0000
Subject: Problem with subprocess.Popen()
Message-ID: <1185959039.674882.210540@q75g2000hsh.googlegroups.com>

Hi all,

I'm trying to run a windows batch file from a python script using
subprocess.popen().

The issue that I'm facing is that, if i give the batch file as
parameter to the popen function, the script runs, but if i provide a
parameter, it is not working.

Can someone help me with the command.

The actual windows command to be executed is:

test.bat -t ABC_DE_FG_HI_001 "C:\ABCDEFGHIJKLMNOP.TXT"

What is the actual parameter required for subprocess.Popen(parameter
chain) in this case??

Kindly help me out...

Regards and Thanks in advance...
Ashwin Murali.



From ptmcg at austin.rr.com  Thu Aug 16 10:51:47 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Thu, 16 Aug 2007 07:51:47 -0700
Subject: Problem using Optional pyparsing
In-Reply-To: <mailman.2045.1187248183.22759.python-list@python.org>
References: <mailman.2045.1187248183.22759.python-list@python.org>
Message-ID: <1187275907.006826.310350@50g2000hsm.googlegroups.com>

On Aug 16, 2:09 am, "Nathan Harmston" <ratchetg... at googlemail.com>
wrote:
> Hi,
>
> I know this isnt the pyparsing list, but it doesnt seem like there is
> one. I m trying to use pyparsing to parse a file however I cant get
> the Optional keyword to work.

<snip>

Thanks, Peter, your comments are dead-on.

Pyparsing-related posts crop up here every so often, usually with me
as the culprit.  But to address your question, I've added a "Getting
Help" page to the pyparsing wiki, with links to the various mailing
lists and support pages on SourceForge.  Fortunately, I don't think
this group minds an occasional trip down Pyparsing Lane (there've been
no serious complaints so far).

Some other suggestions/comments on your parser:
- Good use of results names.  For debugging, you can print out the
parse results by using the dump() method - this gives you this kind of
output:
    [1020, 'YS2-10a02.q1k', 'chr09', 1295, 42, 141045, 142297, 'C',
1254, 95.060000000000002, 1295, 'reject_bad_break', '0']
    - dest_id: chr09
    - dest_start: 141045
    - dest_stop: 142297
    - length: 1254
    - percent_id: 95.06
    - result: reject_bad_break
    - row_1: 1020
    - row_11: [1295]
    - row_13: ['0']
    - row_8: C
    - src_id: YS2-10a02.q1k
    - src_start: 1295
    - src_stop: 42
This may give you some ideas on some more meaningful names ('row_8'
looks like an obvious candidate for replacement, for instance).

- If you are using pyparsing 1.4.7, you can abbreviate your calls to
setResultsName to just ("name"), that is, this:
    src_id = identifier.setResultsName("src_id")
can be written as just:
    src_id = identifier("src_id")

- Don't use the name 'float' for the expression for a real number,
since this masks the builtin Python type float, and more importantly,
the builtin Python conversion function float (which you will want to
use in the parse action for this expression).  Perhaps a name like
'real' or 'realNumber' would do.

- There is no need for the trailing space in defining
Literal("ALIGNMENT").

- It is simpler to attach the parse actions to integer and real
themselves, rather than on each line where they are used.  If you end
up with some integer field that you don't want converted, you can
define it in situ, like this:
    zipCode = Word(nums) # don't use integer for this, don't want it
converted
or define a intString expression that does not do the conversion.

- With these changes, your grammar section becomes a little more
readable:
    make_int   = lambda t: int(t[0])
    make_float = lambda t: float(t[0])
    integer    = Word( nums ).setParseAction(make_int)
    real       = Word( nums+".").setParseAction(make_float)
    identifier = Word( alphanums+"-_." )

    alignment  = Literal("ALIGNMENT").suppress()
    row_1      = integer("row_1")
    src_id     = identifier("src_id")
    dest_id    = identifier("dest_id")
    src_start  = integer("src_start")
    src_stop   = integer("src_stop")
    dest_start = integer("dest_start")
    dest_stop  = integer("dest_stop")
    row_8      = oneOf("F C")("row_8")
    length     = integer("length")
    percent_id = real("percent_id")
    row_11     = (integer +
                     Optional(Literal("|") +
                        delimitedList(Word(nums))("subItems"))
                        )("row_11")
    result     = Word(alphas+"_")("result")
    row_13     = commaSeparatedList("row_13")

(although all the ()'s make row_11 a little tough to follow - this
might deserve getting broken up into several lines.)  And yes, I know
that PEP8 says not to align '=' signs on successive assignment
statments, but I truly believe it does help readability at times.

-- Paul





From f.guerrieri at gmail.com  Tue Aug 28 06:04:40 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Tue, 28 Aug 2007 12:04:40 +0200
Subject: XML File -- dictionary edit/search
In-Reply-To: <1188276957.123003.250410@q5g2000prf.googlegroups.com>
References: <1188263724.306539.181980@y42g2000hsy.googlegroups.com>
	<1188276957.123003.250410@q5g2000prf.googlegroups.com>
Message-ID: <79b79e730708280304h246914f7k6abd647cd7713024@mail.gmail.com>

On 8/28/07, Nagarajan <naga86 at gmail.com> wrote:
> A simple yaml file might just do the trick.
> Your yaml file shall look like the following:
>
> Word-def.yaml
> word1: word1's definition
> word2: word2's definition
> ..
> ..
> ..
> Use pyyaml to handle yaml files.
> --------
> import yaml
> worddefs = yaml.load( open( "word-def.yaml", "r" ).read() )
> print worddefs
> --------


I agree with the suggestion for yaml!
Since definitions are to be inputed by the users, it could be better
to use yaml.safe_load() to reduce the risks...

francesco


From gagsl-py2 at yahoo.com.ar  Sun Aug 12 14:17:28 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 12 Aug 2007 15:17:28 -0300
Subject: Formatting Results so that They Can be Nicely Imported into a
	Spreadsheet.
References: <1186270555.514649.311280@d30g2000prg.googlegroups.com>
	<1186278638.931477.39760@z24g2000prh.googlegroups.com>
	<Avati.40$Tu1.6@newsfe12.lga>
	<1186284359.668342.5880@d30g2000prg.googlegroups.com>
	<1186304814.129279.207100@j4g2000prf.googlegroups.com>
Message-ID: <op.twk2n1q6x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 05 Aug 2007 06:06:54 -0300, SMERSH009 <SMERSH009X at gmail.com>  
escribi?:

> The only question that remains for me--and this is just for my
> knowledge-- what does the "if i" mean in this code snippet?
> f = [i.split() for i in d if i]
> How is it helpful to leave a dangling "if i"? Why not just f =
> [i.split() for i in d]?

`if i` means `if i is considered true`. In this case we are talking about  
strings: "" is false and all other strings are true. So this is a way to  
say `if i is not the empty string`, effectively filtering out empty lines.
Perhaps using more meaningful names for variables makes the code more  
clear:

exploded_lines = [line.split() for line in lines if line]

-- 
Gabriel Genellina



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug  2 04:32:41 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 02 Aug 2007 10:32:41 +0200
Subject: Awkward format string
In-Reply-To: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
References: <1185984697.605529.157110@g12g2000prg.googlegroups.com>
Message-ID: <46b196aa$0$18885$426a74cc@news.free.fr>

beginner a ?crit :
> Hi,
> 
> In order to print out the contents of a list, sometimes I have to use
> very awkward constructions. For example, I have to convert the
> datetime.datetime type to string first, construct a new list,

s/list/tuple/

> and then
> send it to print. The following is an example.
> 
> 	x=(e[0].strftime("%Y-%m-%d"), e[1].strftime("%Y-%m-%d"))+e[2:]
> 	print  >>f, "%s\t%s\t%d\t%f\t%f\t%f\t%d" % x
> 
> e is a tuple. x is my new tuple.
> 
> Does anyone know better ways of handling this?



 >>> from datetime import datetime
 >>> dt = datetime(2007,8,2)
 >>> dt
datetime.datetime(2007, 8, 2, 0, 0)
 >>> str(dt)
'2007-08-02 00:00:00'
 >>> "%s" % dt
'2007-08-02 00:00:00'
 >>> dt.date()
datetime.date(2007, 8, 2)
 >>> str(dt.date())
'2007-08-02'


Do you really need datetime objects ? If not, using date objects instead 
would JustWork(tm) - at least until someone ask you to use another date 
format !-)


Else, and since you seem to have a taste for functional programming:

from datetime import datetime
from functools import partial

def iformat(e):
     fake = lambda obj, dummy: obj
     for item in e:
         yield getattr(item, 'strftime', partial(fake, item))('%Y-%m-%d')


e = (datetime(2007,8,1),datetime(2007,8,2) ,42, 0.1, 0.2, 0.3, 1138)
print tuple(iformat(e))
print "%s\t%s\t%d\t%f\t%f\t%f\t%d" % tuple(iformat(e))


From fake at email.org  Sat Aug  4 09:56:26 2007
From: fake at email.org (MASI)
Date: Sat, 4 Aug 2007 15:56:26 +0200
Subject: [DISLIN] Polar Grid
Message-ID: <1lutleeq7w0r6.1ovbcr7dzd5p1$.dlg@40tude.net>

Hi,
in a polar graph if I define the position of the first label TOP or
BOTTOM,the grid doesn't show.
Is this a bug?
 
e.g.

dislin.polmod('top', 'clockwise')
dislin.polar  (1.,0., 0.2, 0., 30.)
dislin.grdpol(3,16)


From vasudevram at gmail.com  Tue Aug  7 10:07:48 2007
From: vasudevram at gmail.com (vasudevram)
Date: Tue, 07 Aug 2007 14:07:48 -0000
Subject: Web based Reporting tool for Python
In-Reply-To: <1186460956.945148.162610@k79g2000hse.googlegroups.com>
References: <1186460956.945148.162610@k79g2000hse.googlegroups.com>
Message-ID: <1186495668.390714.250780@e16g2000pri.googlegroups.com>


Madhu Alagu wrote:
> Hi
>
>
>
> I am looking template based report tools for python.It has the ability
> to deliver rich content onto the screen, to the printer or into PDF,
> HTML, XLS, CSV and XML files.
>
>
>
>
>
> Thanks,
>
> Madhu Alagu

I don't know if there's a _single_ tool that can do all you want
(there may be, just that I don't know of one), but there are many
tools that can each do some part of it. Here are some, off the top of
my head - Googling should get you more for each category.

For templating - Cheetah, others.

For PDF - ReportLab. PDFLib has Python bindings too, but its paid for
commercial use, IIRC.

For HTML - Python standard library itself has some stuff, there must
be others.

For XLS/CSV - CSV output is easy enough to "roll your own". Then
import the CSV into Excel. If this isn't good enough (and it may not
be, depending on your needs, as it requires manual (ok, it is possible
to sort of automate that too using COM) import of the CSV into Excel.
Google for a Python lib for direct XLS generation.

For XML - like CSV, for simple XML, can be written by you (its just
outputting XML tags, attributes and content from your code). There
might be issues with encodings, etc. - in which case use a lib. Python
has many XML libs - do some research.
David Mertz and Uche Ogbuji, among others, have written a lot of
articles on Python and XML, many of them are about reviewing and
comparing various libs like ElementTree, Gnosis XML utilities  and
others. Many of those and other articles are on IBM developerWorks and
XML.com.

Vasudev Ram
http://www.dancingbison.com
http://jugad.livejournal.com
http://sourceforge.net/projects/xtopdf



From Brian.McCann at viziant.net  Mon Aug 20 17:05:49 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Mon, 20 Aug 2007 17:05:49 -0400
Subject: reading a line in file
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx><2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com><93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx><2dc0c81b0708201207p7f83f2e0l6de15fd70be252a5@mail.gmail.com><93066C069973ED448DC2BCEA9C44A7383BE2B6@efmailx><46C9F561.50405@jayloden.com><2dc0c81b0708201314q727ca3a1s12bef74a25b20abc@mail.gmail.com><46C9F88A.9090400@jayloden.com>
	<2dc0c81b0708201335m1a158176o9ea456778d2a8597@mail.gmail.com>
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE2B7@efmailx>

Hi Shawn,

what if I had a file
com.properties with the below line in it

If I needed to capture the value of everything separeted by a ":"
and asign each to a variable would regex be the right method to grab those?

like 
a=jdbc
b=oracle
c=@127.0.0.1
d=1521
e:XE
 
--Brian

com.db.connstr=jdbc:oracle:thin:@127.0.0.1:1521:XE
 
 
 

________________________________

From: python-list-bounces+brian.mccann=viziant.net at python.org on behalf of Shawn Milochik
Sent: Mon 8/20/2007 4:35 PM
To: python-list at python.org
Subject: Re: reading a line in file



Although you're technically correct, I think there's a knee-jerk
anti-regex reaction, citing the meaningless overhead. If you're
running many thousands of records or something then it becomes a small
issue compared to a replace statement or something. But in most cases
it makes no difference at all.

Run the example script both ways and I'm sure there will be no
difference, and I prefer a clear regex to a convoluted (in my opinion)
substring call.

In any case, it's a preference, and I have never seen anything which
convinced me that one should avoid regexes at all costs unless there's
no other way to do it.

And the comment about solving a problem by using regular expressions
creating another problem is just asinine.  Like so many other things,
it's often repeated without any thought about whether it is true in
general, much less in the situation in question.
--
http://mail.python.org/mailman/listinfo/python-list


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From soundplay at gmail.com  Mon Aug 27 12:38:08 2007
From: soundplay at gmail.com (SHY)
Date: Mon, 27 Aug 2007 18:38:08 +0200
Subject: weird edgecolumn behavior in scintilla
Message-ID: <f6be0af40708270938q5ecb3a6ka6185425b2103040@mail.gmail.com>

hey everyone,

i decided its time to heavily improve myself in python-gui programming and
so i started building my own editor/ide for PHP. so far, most of the
general/basic features are inspired (read: mostly copy-pasted) by eric4 IDE
build upon qt4/scintilla combination.

but i came across to a weird problem with the scintilla's edgemodes. when i
set it up to edgeline mode and the edgecolumn is set to 80, the edgeline is
drawn (assuming the default scintilla settings) at approximately 50th
character from the left (and 30th character when the lexer is off - aka txt
files), instead of the expected 80. ive tried to play around with the
lexers' styles to change fonts (courier new, size 10) and stuff but it keeps
drawing the line on 50th column.

ive made a non-elegant and non-pragmatic workaround to this, by setting the
edgecolumn to 128 when the lexer is turned on and 213 when it is off. both
values approximately match the 80th column for courier-new size 10.

i originally thought that the column length for the edgecolumn value is
computed from the character width of the particular font, and so that by
changing the font or its size, the edgecolumn would change appropriately.
dunno if this is the problem of scintilla (cause the exactly same thing is
present in eric4 as well) or i just missed some important setting.

this is the code that handles the edgecolumn stuff when the editor is
launched:

[code]
        edgeMode = Preferences.getEditor("EdgeMode")
        edge = QsciScintilla.EdgeMode(edgeMode)
        self.setEdgeMode(edge)
        if edgeMode:
            self.setEdgeColumn(Preferences.getEditor("EdgeColumn"))
            self.setEdgeColor(Preferences.getEditorColour("Edge"))

[/code]

the EdgeColumn preferences value defaults to 80.

any ideas?

thanks in advance.
SHY
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From greg at cosc.canterbury.ac.nz  Wed Aug  8 07:53:28 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Wed, 08 Aug 2007 23:53:28 +1200
Subject: Issues of state
In-Reply-To: <7x8x8mpn37.fsf@ruckus.brouhaha.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1680.1186416061.22759.python-list@python.org>
	<7x3aywr4tc.fsf@ruckus.brouhaha.com>
	<mailman.1684.1186422197.22759.python-list@python.org>
	<gg9mo4-p2m.ln1@lairds.us> <7x8x8mpn37.fsf@ruckus.brouhaha.com>
Message-ID: <5htpcrF3lqmrnU1@mid.individual.net>

Paul Rubin wrote:
> I'm not sure what you're getting at in this context.  You can write a
> desktop app where the window system communicates with a gui toolkit
> through a socket (at least that's how X windows works)

An X server connection is *much* more stateful than
an HTTP one. It persists throughout the entire use
session of the application, for one thing, and there
is heaps of state being kept on both sides of the
connection. There's also a very high communication
bandwidth between them. There's really no comparison.

--
Greg


From kyosohma at gmail.com  Thu Aug  2 14:14:30 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 02 Aug 2007 18:14:30 -0000
Subject: problems playing with dates from any month.
In-Reply-To: <mailman.1522.1186075887.22759.python-list@python.org>
References: <mailman.1522.1186075887.22759.python-list@python.org>
Message-ID: <1186078470.764903.99590@z24g2000prh.googlegroups.com>

On Aug 2, 12:31 pm, "krishnakant Mane" <researchb... at gmail.com> wrote:
> hello,
> I have a very strange problem and I can't find any solution for that.
> I am working on an accounting package which I wish to develop in python.
> the simple problem is that I want to knoe how I can know if the given
> date is the nth day of a month.
> for example if a customer is supposed to pay his installment on every
> 5th of all months,
> I want to know if today is the fifth day (jan the fifth, feb the fifth
> etc) for any given month.
> I have not found any such function.
> if I have looked (or over looked ) in the wrong places I am really sorry.
> secondly I also want to know the way in which I can convert a given
> string to a date object.
> for example if I have a string "29/09/2005", I know it is a valid date
> although it is in a string form.
> now I want to convert the above string into a real date object.
> how can I cast it this way?
> regards,
> Krishnakant.

You should also check this place out: http://labix.org/python-dateutil

Lots of cool date manipulation using the dateutil module.

Mike



From codey45 at yahoo.com  Mon Aug 13 10:50:41 2007
From: codey45 at yahoo.com (codey45)
Date: Mon, 13 Aug 2007 07:50:41 -0700
Subject: Car Air Conditioners
In-Reply-To: <1186993120.706804.185590@b79g2000hse.googlegroups.com>
References: <1186993120.706804.185590@b79g2000hse.googlegroups.com>
Message-ID: <1187016641.379882.227860@q3g2000prf.googlegroups.com>

On Aug 13, 1:18 am, Lepi Duja <digitalplusm... at gmail.com> wrote:
> All the informations about car air conditioners can be found on this
> website...
>
> http://car-air-conditioning.blogspot.com/




From kalin at el.net  Sun Aug 12 16:56:45 2007
From: kalin at el.net (kalin mintchev)
Date: Sun, 12 Aug 2007 16:56:45 -0400 (EDT)
Subject: cgi and headers
Message-ID: <49261.74.2.36.140.1186952205.squirrel@mail.el.net>


hi there...

i'm starting to work with python cgi scripts using ajax.
one problem i have is that the cgi module doesn;t do (apparently) anything
without the -- print "Content-type: text/html\n" -- line in the script.

the issue is that the output of the script has to be an xml file and not
an html. it's not really a problem for any normal browser but the retarded
explorer thing doesn;t process the xml unless it gets back the xml header.

so my scripts work fine on mozilla but not in explorer because of the
missing xml header.

what would be the correct solution for this?

thanks....





From winkatl1213 at yahoo.com  Thu Aug  2 11:54:04 2007
From: winkatl1213 at yahoo.com (winkatl1213 at yahoo.com)
Date: Thu, 02 Aug 2007 08:54:04 -0700
Subject: Cross compiling 2.5.1
Message-ID: <1186070044.980325.159520@i38g2000prf.googlegroups.com>

I was wondering if anyone could help me with cross-compiling Python
2.5.1 to a MIPS target.

The approach I'm using is based off the suggestion in the README file
that comes with the python source distribution.

I managed to get the configure script to run using the following
command line:

$ ../Python-2.5.1/configure --host=mips-linux --enable-shared

Next I run make and it builds the python interpreter and shared
library.  However, it then attempts to run the interpreter to complete
the rest of the build process, and that of coarse fails.

I read several posts on the internet from people who applied patches
to the python source to enable cross-compling, but my impression was
that 2.5.1 had merged some of this work.

Can anyone give me some suggestions on how I get the makery to use the
build interpreter instead of the host interpreter to complete the
build process?

Thanks in advance for any suggestions.

Jeff



From geoff.bache at pobox.com  Mon Aug 27 16:21:16 2007
From: geoff.bache at pobox.com (geoffbache)
Date: Mon, 27 Aug 2007 13:21:16 -0700
Subject: Getting subprocesses to be hidden on Windows
Message-ID: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>

Hi,

As part of my efforts to write a test tool that copes with GUIs
nicely, I'm trying to establish how I can start a GUI process on
Windows that will not bring up the window. So I try to hide the window
as follows:

info = subprocess.STARTUPINFO()
info.dwFlags |= subprocess.STARTF_USESHOWWINDOW
info.wShowWindow = subprocess.SW_HIDE

proc = subprocess.Popen(..., startupinfo=info)

This works, in a way, but doesn't work recursively. I.e. if the
started process itself starts a window, that second window will not be
hidden. This even applies to dialog boxes within the application. So
instead of a lot of windows popping up I now get a lot of disembodied
dialogs appearing, which is a slight improvement but not much.

Also, certain processes (e.g. tkdiff) seem to ignore the directive to
be hidden altogether.

This is dead easy on UNIX with virtual displays like Xvfb. Can someone
shed any light if it's possible on Windows from python?

Regards,
Geoff Bache



From michele.simionato at gmail.com  Wed Aug  1 01:44:21 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 01 Aug 2007 05:44:21 -0000
Subject: Python end of file marker similar to perl's __END__
In-Reply-To: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
References: <1185940391.135261.130950@i38g2000prf.googlegroups.com>
Message-ID: <1185947061.985093.306840@22g2000hsm.googlegroups.com>

On Aug 1, 5:53 am, beginner <zyzhu2... at gmail.com> wrote:
> Hi All,
>
> This is just a very simple question about a python trick.
>
> In perl, I can write __END__ in a file and the perl interpreter will
> ignore everything below that line. This is very handy when testing my
> program. Does python have something similar?
>
> Thanks,
> Geoffrey

I wished from something like that. What you can do at the
moment, is to comment or triple quote the code you
don't want to run.

   Michele Simionato



From gtaylor at CLEMSON.EDU  Mon Aug 20 14:58:28 2007
From: gtaylor at CLEMSON.EDU (Greg Taylor)
Date: Mon, 20 Aug 2007 14:58:28 -0400
Subject: CIE Colorspace Conversions
Message-ID: <46C9E454.1070303@clemson.edu>

Greetings,

I'm not sure if this is the right place to probe for interest, but I 
figured I'd give it a shot.

Recently, a project I undertook at work required us to convert between 
the various CIE color spaces (XYZ, Lab, LCH, Luv, etc.). I looked long 
and hard but didn't find any Python library that did this, I was able to 
find JavaScript and C-based implementations, but that's about it. For a 
good example of the kinds of conversions I am referring to, see: 
http://brucelindbloom.com/ColorCalculator.html

This is likely only to interest those in the Graphic Communications 
industry (notably printers and anyone else having to deal with color 
science), but I'm curious to see if anyone out there in the Python 
community would have any use for a color conversion library. If I've 
missed an existing implementation, feel free to point it my way as well.

I'd love to eventually be able to quickly convert between color spaces 
and perform comparisons like Delta E without having to worry about doing 
said conversions manually. I'm not too sure this excites anyone else, 
though!

Greg Taylor
Clemson University '08
Graphic Communications


From godzillaismad at gmail.com  Tue Aug 14 00:57:22 2007
From: godzillaismad at gmail.com (Godzilla)
Date: Mon, 13 Aug 2007 21:57:22 -0700
Subject: Memory leak when creating lots of object
Message-ID: <1187067442.084074.55010@z24g2000prh.googlegroups.com>

Hello,

I have a program that create and pop an object off a queue, but it is
experiencing some memory leakage. I have been unable to detect where
the memory leakage occur. The strange thing is when i replace the
object creation with a plain integer/string, the leak goes away...
Here's the code I used as my test:


import Queue
import threading
import time

q = Queue.Queue(0)

class PDU:
    def __init__(self, name=''):
        self.name = name

class qTest(threading.Thread):
    def __init__(self, name=''):
        threading.Thread.__init__(self)
        self.name = name
        self.threadContinue = True

    def run(self):
        count = 0
        while self.threadContinue:
            pdu = q.get(True)
            del pdu
            count+=1
            #print count
            if q.qsize() == 0:
                print "Total get in bulk", count
                count = 0

    def stop(self):
        self.threadContinue = False
        q.put(1)


if __name__ == "__main__":
    try:
        qt = qTest()
        qt.start()
        loopCount = 1000
        while True:
            for i in range(loopCount):
                pdu = PDU()
##                pdu = 1
                q.put(pdu)
            time.sleep(5)

    except KeyboardInterrupt:
        print "Keyboard interrupted. Program exit."
    except Exception, why:
        print why

    if qt.isAlive():
        qt.stop()

I can see the memory usage increases slowly in Task Manager under XP,
but do not know why. Anyone help?

Thank you.



From joshua at eeinternet.com  Wed Aug  1 19:47:21 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 01 Aug 2007 15:47:21 -0800
Subject: Is shelve/dbm supposed to be this inefficient?
Message-ID: <f8r62b$9lm$1@sea.gmane.org>

I am using shelve to store some data since it is probably the best solution
to my "data formats, number of columns, etc can change at any time"
problem.  However, I seem to be dealing with bloat.

My original data is 33MB.  When each row is converted to python lists, and
inserted into a shelve DB, it balloons to 69MB.  Now, there is some
additional data in there namely a list of all the keys containing data (vs.
the keys that contain version/file/config information), BUT if I copy all
the data over to a dict and dump the dict to a file using cPickle, that
file is only 49MB.  I'm using pickle protocol 2 in both cases.

Is this expected? Is there really that much overhead to using shelve and dbm
files?  Are there any similar solutions that are more space efficient?  I'd
use straight pickle.dump, but loading requires pulling the entire thing
into memory, and I don't want to have to do that every time.

[Note, for those that might suggest a standard DB.  Yes, I'd like to use a
regular DB, but I have a domain where the number of data points in a sample
may change at any time, so a timestamp-keyed dict is arguably the best
solution, thus my use of shelve.]

Thanks for any pointers.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From gnewsg at gmail.com  Tue Aug 21 17:59:05 2007
From: gnewsg at gmail.com (billiejoex)
Date: Tue, 21 Aug 2007 14:59:05 -0700
Subject: libgmail failure
In-Reply-To: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
References: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
Message-ID: <1187733545.529286.78980@50g2000hsm.googlegroups.com>

On 21 Ago, 23:07, "james.p.n... at gmail.com" <james.p.n... at gmail.com>
wrote:
> Hey all,
>
> I've been using libgmail to send out automated notification emails for
> my company's nightly regression testing.  Last night these emails
> started failing, though the python code has not changed.  I updated to
> the latest libgmail, but that isn't helping.  I've logged in to the
> email account directly, and the account is still working fine.
>
> The error I get is "HTTP Error 400: Bad Request" when using
> gmailAccount.login().  This doesn't throw an exception, just prints
> the error.  The code crashes outright when it tries to send mail.
>
> This code has been up and running for several months and just started
> failing last night.  Does anyone have an idea what's going on?
>
> The code and error follow (fairly short :-)
>
> Thanks much,
> James
>
> Code:
> ---------------------------------------------------------------------------?----------------------------
> def send(TO_LIST,SUBJECT,MESSAGE):
>     GA = libgmail.GmailAccount("xxx... at gmail.com","xxxxxxx")
>     try:
>         print "Logging in"
>         GA.login()
>     except libgmail.GmailLoginFailure:
>         print "\nLogin failed. (Wrong username/password?)"
>     else:
>         print "Log in successful.\n"
>         for RX in TO_LIST:
>             MSG = libgmail.GmailComposedMessage(RX,SUBJECT,MESSAGE)
>             if GA.sendMessage(MSG):
>                 print "Message successfully sent to `%s` ." % RX
>             else:
>                 print "Could not send message."
> ---------------------------------------------------------------------------?----------------------------
>
> Output:
> ---------------------------------------------------------------------------?----------------------------
> Logging in
> HTTP Error 400: Bad Request
> Log in successful.
>
> No messages found
> Traceback (most recent call last):
>   File "C:\projects\physware\testCases\PythonTestScripts
> \SendEmail.py", line 58, in <module>
>     main()
>   File "C:\projects\physware\testCases\PythonTestScripts
> \SendEmail.py", line 55, in main
>     send(TO_LIST,SUB,MSG)
>   File "C:\projects\physware\testCases\PythonTestScripts
> \SendEmail.py", line 39, in send
>     if GA.sendMessage(MSG):
>   File "C:\projects\physware\testCases\PythonTestScripts\libgmail.py",
> line 588, in sendMessage
>     U_ACTION_TOKEN: self._getActionToken(),
>   File "C:\projects\physware\testCases\PythonTestScripts\libgmail.py",
> line 563, in _getActionToken
>     at = self._cookieJar._cookies[ACTION_TOKEN_COOKIE]
> KeyError: 'GMAIL_AT'
> ---------------------------------------------------------------------------?----------------------------

Don't know if it's for the same reason since I can't remember if the
error was the same, but some times ago I had a similar problem.
I used libgmail for copying a lot of mails from a google mail box to
another and I've been "black-listed" after a while for flooding.
After that I wasn't neither able to access my account from browser for
a certain amount of time (one or two days).
Try to do same operation 'manually' (by using a browser try to log-in
by using your account, then send a mail) and see if you're able to do
so.



From naga86 at gmail.com  Thu Aug 23 02:47:40 2007
From: naga86 at gmail.com (Nagarajan)
Date: Thu, 23 Aug 2007 06:47:40 -0000
Subject: Raw strings to normal strings conversion?
Message-ID: <1187851660.209024.59860@l22g2000prc.googlegroups.com>

Is there a way by which I could obtain normal string form of a raw
string.
XML CDATA is returned as raw string. But I need the string to actually
escape special chars.

Any idea?



From eggie5 at gmail.com  Thu Aug  9 20:02:41 2007
From: eggie5 at gmail.com (eggie5)
Date: Fri, 10 Aug 2007 00:02:41 -0000
Subject: beginner whitespace question
In-Reply-To: <1186703525.591462.122140@m37g2000prh.googlegroups.com>
References: <1186703261.136506.208660@x35g2000prf.googlegroups.com>
	<1186703525.591462.122140@m37g2000prh.googlegroups.com>
Message-ID: <1186704161.334597.218750@z24g2000prh.googlegroups.com>

On Aug 9, 4:52 pm, Dan Bishop <danb... at yahoo.com> wrote:
> On Aug 9, 6:47 pm, eggie5 <egg... at gmail.com> wrote:
>
> > I keep getting an error for line 7, what's wrong with this?
>
> > from django.db import models
>
> > class Poll(models.Model):
> >     question = models.CharField(max_length=200)
> >     pub_date = models.DateTimeField('date published')
>
> >         def __unicode__(self):
> >                 return self.question
>
> The "def" statements have to be at the same indentation level as
> what's before it.

will they still be a part of the classes?



From kw at codebykevin.com  Sun Aug 19 11:52:34 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Sun, 19 Aug 2007 11:52:34 -0400
Subject: Python and Tkinter Programming--Expensive!
In-Reply-To: <slrnfcdj46.t75.nick@irishsea.home.craig-wood.com>
References: <Xllxi.9066$3x.1781@newssvr25.news.prodigy.net>
	<slrnfcdj46.t75.nick@irishsea.home.craig-wood.com>
Message-ID: <1379c$46c8674b$4275d90a$31180@FUSE.NET>

Nick Craig-Wood wrote:
> W. Watson <wolf_tracks at invalid.com> wrote:
>>  Why is the book in Subject (author is Grayson) so expensive? $100 on Amazon 
>>  and $195 on ABE. Aren't there alternatives?
> 
> There is an excellent section (266 pages) on TKinter in "Programming
> Python" by Mark Lutz. I've got the 2nd edition.
> 
> Lutz concentrates on TK programming using classes, making re-usable
> components which I found really helpful compared to the ad-hoc way I'd
> seen TK presented previously.
> 
+1 on Lutz. It's very current, and has helped me learn Tkinter 
programming (and I already have a background with Tk via Tcl).

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From vedrandekovic at v-programs.com  Wed Aug 22 03:26:18 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Wed, 22 Aug 2007 00:26:18 -0700
Subject: redirect or cover .bat log
In-Reply-To: <5j26bvF3s7lbpU2@mid.uni-berlin.de>
References: <1187764689.836375.212730@z24g2000prh.googlegroups.com>
	<5j26bvF3s7lbpU2@mid.uni-berlin.de>
Message-ID: <1187767578.925671.107000@q4g2000prc.googlegroups.com>

On 22 kol, 09:19, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> vedrandeko... at v-programs.com schrieb:
>
> > Hello,
>
> > e.g I need run my my_scripts_setup.bat that contain:
>
> > python myscript_setup.py py2exe
>
> > Can I cover or redirect log of that process into my wx program?
> > I'am using Windows XP SP2, and Python 2.5.
>
> Who's running the bat, and who's running the wx program?
>
> Diez

Hi,

First I convert my main wx program to exe with my py2exe setup,then
under my main program (exe),
I must run that .bat file and redirect or cover that process.


Regards,
Vedran



From pyth0nc0d3r at gmail.com  Mon Aug 20 16:42:25 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Mon, 20 Aug 2007 15:42:25 -0500
Subject: Regarding Classes
Message-ID: <eb79828c0708201342sdb7e572h9dde11f914e12436@mail.gmail.com>

What is the main reason of "self" when it involves classes/functions
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From flavio.preto at gmail.com  Wed Aug 22 00:26:27 2007
From: flavio.preto at gmail.com (Flavio Preto)
Date: Wed, 22 Aug 2007 01:26:27 -0300
Subject: Threads and racing conditions
Message-ID: <5fb10ac20708212126j70f8100bka66fe5e3661904cc@mail.gmail.com>

Hi,

I have a doubt. Supose that i have the minimun class below:

class db:
    def __init__(self):
        self.db = {}
    def read(self, key):
        return self.db[key]
    def write(self, key, value):
        self.db[key] = value


and an object of this class is shared among some threads. Is it possible
that in a read, the method return a value that is not an old or a new value?
In other words, is it possible that a 'read' return (due to a 'write' at the
same time by another thread) an invalid value that was never supposed to be
there?

Thanks,
Flavio Preto
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From paul.faulstich at gmail.com  Sun Aug 26 18:08:18 2007
From: paul.faulstich at gmail.com (paul)
Date: Sun, 26 Aug 2007 15:08:18 -0700
Subject: pySerial in a daemon process
In-Reply-To: <5je954F3s0nilU1@mid.individual.net>
References: <1188158581.316824.89360@k79g2000hse.googlegroups.com>
	<5je954F3s0nilU1@mid.individual.net>
Message-ID: <1188166098.738058.182580@w3g2000hsg.googlegroups.com>

On Aug 26, 5:20 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> paul wrote:
> > If I put these back in and try to run the daemon, the script fails
> > when I try to connect to the serial port, with this error:
> > serial.serialutil.SerialException: Could not open port: [Errno 13]
> > Permission denied: '/dev/ttyS0'
>
> Did you check the permissions on this file? Often you have to be
> member of a "dialout" group or similar to get access.
>
> Regards,
>
> Bj?rn
>
> --
> BOFH excuse #172:
>
> pseudo-user on a pseudo-terminal


THANKS! That did it, but perhaps can you explain to me why...

Before I had posted this question first thing I did was to look at /
dev/ttyS0, and indeed the group is dialout (gid=20), so I tried a
couple of things:

1. checked my id to see if I was a member of dialout, and indeed I
am.  So, I edited the daemon script to use my id and set the gid to
dialout (ie: os.setegid(20) & os.seteuid(1000)) and it still failed.

2. made the id I really want to use (pydaemon, uid=110) a member of
dialout, and set the daemon script to use those (ie: os.setegid(20) &
os.seteuid(110)) and it still failed...

After reading your comment, I went and did a chgrp to set the various
script file groups to dialout, and indeed it now works.  What confuses
me is that if the script needed that group, why doesn't the setegid or
seteuid fail?  Why does the script keep running okay until the
connect, and fail then?

Thanks!

Paul



From claird at lairds.us  Mon Aug 13 13:37:36 2007
From: claird at lairds.us (Cameron Laird)
Date: Mon, 13 Aug 2007 17:37:36 +0000
Subject: Process Control Help
References: <1185808072.695752.20720@z28g2000prd.googlegroups.com>
	<mailman.1393.1185913913.22759.python-list@python.org>
	<1185923367.122846.117750@x40g2000prg.googlegroups.com>
	<heq5p4-29v.ln1@lairds.us>
Message-ID: <0gh6p4-143.ln1@lairds.us>

In article <heq5p4-29v.ln1 at lairds.us>, I mused:
>In article <1185923367.122846.117750 at x40g2000prg.googlegroups.com>,
>Azazello  <tylerca at jeld-wen.com> wrote:
>>On Jul 31, 12:45 pm, Walt Leipold <leip... at ace-net.com> wrote:
>			.
>			.
>			.
>>> It has nothing to do with 'proprietary issues'.  A lot of it has to do
>>> with the perception of support -- who will support Python and custom
>>> Python code if my plant shuts down?  Who will train my developers and
>>> operators?  Who can I sue?  The rest of it is because of the way the
>			.
>			.
>			.
>>> Yes, it's a shame that you have to buy three packages to perform three
>>> functions, and then buy other 3rd-party packages to tie them together.
>>> Yes, it's a shame that industrial software is expensive, and
>>> proprietary, and Windows-only, and generally has a brain-dead scripting
>>> language (when it has any scriptability at all).  Still, as much as it
>>> galls me to say it, if your company's primary business isn't writing
>>> industrial automation software, don't write industrial automation
>>> software.
>			.
>			.
>			.
>>> * Unless you're a hobbyist, if you want to do data acquisition or i/o,
>>> purchase an i/o server for your particular bus/instrumentation from a
>>> major manufacturer.  You *can* write your own i/o server, especially for
>>> simple protocols like Modbus, but the commercial versions have been
>>> tested more exhaustively than you can manage.  Also, the most common
>>> protocol these days is OPC, which isn't a protocol at all in the
>>> conventional sense -- it's a set of APIs to a Windows DLL, with the
>>> wire-level details completely opaque -- so you'd have to buy a library
>>> for that anyway.
			.
			.
			.
>>> on Visual Basic for Applications rather than a better (and free and Open
>>> Source!) language like Python.  It's also a tragedy that the dominant
>>> i/o 'protocol' for industrial automation isn't really a protocol, and is
>>> Windows-only to boot.  It's horrifying that the primary means of
>>> communication between process control and data acquisition applications
>>> is via DDE or ActiveX.  And I find it incredible that people and
>>> companies will pay large sums of money for some of the industrial
>>> automation products on the market.  But that's the way the industry
>>> works, and, as frustrating as the commercial offerings are, using them
>>> will probably be better for you and your company in the long run.
>			.
>			.
>			.
>>I really appreciate your post Walt. I started this thread last week
>>and I have to admit that in the subsequent days the 'option' of using
>>Python for our control solutions is simply not feasible.  Although the
>>project I wanted to implement was fairly small scale, no 20 ton pieces
>>or x-ray machinery, the principle of the matter remains the same,
>>especially as a large corporation.  As an intern returning to school
>>in the fall, the underlying responsibility for a Python system was my
>>original concern and discouragement to my employer for persuing this
>>path.  It became readily apparent that using the crumby software
>>packaged with our control devices is surely faster in the long run, as
>>we are not involved in software development.  (The majority of my
>>coworkers' formal programming experience is in FORTRAN) It has been a
>>very discouraging few days.  There's so much room for improvement and
>>yet...  My 4-day conclusion is unless you're already involved in
>>controls software you must be crazy to join.  Are many young engineers
>>entering this field?
>>
>
>At an anecdotal level, I'd guess that, no, there are few
>young engineers entering this field.
			.
			.
			.
'Just occurred to me that a GREAT thing to do might be for a young
engineer to catch the SD Best Practices 2007 East in Boston in
September <URL: http://www.sdexpo.com/2007/sdbp/overview.htm >,
which is running concurrently with Embedded Systems <URL: 
http://www.embedded.com/esc/boston/ > (as well as RFID World <URL:
http://www.rfid-world.com/boston/ >).  They sell inspiration by the
half-hour.


From arkanes at gmail.com  Fri Aug 10 12:13:30 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 10 Aug 2007 11:13:30 -0500
Subject: The Future of Python Threading
In-Reply-To: <1186760254.859080.137840@g12g2000prg.googlegroups.com>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<87ir7n4fps.fsf@benfinney.id.au>
	<1186760254.859080.137840@g12g2000prg.googlegroups.com>
Message-ID: <4866bea60708100913l59f63266x93286947d953e46b@mail.gmail.com>

On 8/10/07, Ben Sizer <kylotan at gmail.com> wrote:
> On 10 Aug, 15:38, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
> > "Justin T." <jmtull... at gmail.com> writes:
> > > The truth is that the future (and present reality) of almost every
> > > form of computing is multi-core, and there currently is no effective
> > > way of dealing with concurrency.
> >
> > Your post seems to take threading as the *only* way to write code for
> > multi-core systems, which certainly isn't so.
> >
> > Last I checked, multiple processes can run concurrently on multi-core
> > systems. That's a well-established way of structuring a program.
>
> It is, however, almost always more complex and slower-performing.
>
> Plus, it's underdocumented. Most academic study of concurrent
> programming, while referring to the separately executing units as
> 'processes', almost always assume a shared memory space and the
> associated primitives that go along with that.
>

This is simply not true. Firstly, there's a well defined difference
between  'process' and a 'thread' and that is that processes have
private memory spaces. Nobody says "process" when they mean threads of
execution within a shared memory space and if they do they're wrong.

And no, "most" academic study isn't limited to shared memory spaces.
In fact, almost every improvement in concurrency has been moving
*away* from simple shared memory - the closest thing to it is
transactional memory, which is like shared memory but with
transactional semantics instead of simple sharing. Message passing and
"shared-nothing" concurrency are very popular and extremely effective,
both in performance and reliability.

There's nothing "undocumented" about IPC. It's been around as a
technique for decades. Message passing is as old as the hills.

> > > We still worry about setting up threads, synchronization of message
> > > queues, synchronization of shared memory regions, dealing with
> > > asynchronous behaviors, and most importantly, how threaded an
> > > application should be.
> >
> > All of which is avoided by designing the program to operate as
> > discrete processes communicating via well-defined IPC mechanisms.
>
> Hardly. Sure, so you don't have to worry about contention over objects
> in memory, but it's still completely asynchronous, and there will
> still be a large degree of waiting for the other processes to respond,
> and you have to develop the protocols to communicate. Apart from
> convenient serialisation, Python doesn't exactly make IPC easy, unlike
> Java's RMI for example.
>

There's nothing that Python does to make IPC hard, either. There's
nothing in the standard library yet, but you may be interested in Pyro
(http://pyro.sf.net) or Parallel Python
(http://www.parallelpython.com/). It's not erlang, but it's not hard
either. At least, it's not any harder than using threads and locks.


From mcfletch at vrplumber.com  Thu Aug 23 10:09:22 2007
From: mcfletch at vrplumber.com (Mike C. Fletcher)
Date: Thu, 23 Aug 2007 10:09:22 -0400
Subject: Question: wxpython and 3d engine example with model load ?
In-Reply-To: <1187860306.533382.248430@j4g2000prf.googlegroups.com>
References: <1187860306.533382.248430@j4g2000prf.googlegroups.com>
Message-ID: <46CD9512.1010206@vrplumber.com>

OpenPavilion wrote:
...
> I would like to create an application, which uses wxpython tree, menu
> and grid elements and embedds a 3d view of some of the listed objects
> in an own detail window, so showing the object as a 3d model.
> I know there is PyOpenGL as well, but I need to load complete models
> (meshes done with cinema4d or blender) into the 3d view.
>   
There's a bit of sample code in OpenGLContext/bin (yes, yes, I know, 
part of PyOpenGL, which you don't want) that does a 
VRML-97-scenegraph-rendering window + a shell (you'll need the latest 
CVS version to work with modern wxPythons).  There's commented out code 
that inserted a tree (to show the scenegraph as a tree, but I haven't 
got that finished).

Other options:

    * I think Pivy (Coin/Inventor wrapper) could likely be embedded in
      PyQt (it has a Qt-based window operation IIRC) if that's an
      acceptable compromise.
    * http://www.python-ogre.org/wiki/DownloadsPage seems to suggest
      there's an example for using Ogre with wxPython/wxWidgets.
    * http://panda3d.org/phpbb2/viewtopic.php?=&p=11555 suggests there's
      a way to get panda3d and wxPython working together

I don't see a soya + wxPython page in a few seconds of googling, so I 
guess finding that is left as an exercise for the reader.

HTH,
Mike

-- 
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com



From Shawn at Milochik.com  Mon Aug 20 15:07:02 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Mon, 20 Aug 2007 15:07:02 -0400
Subject: reading a line in file
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE2B2@efmailx>
	<2dc0c81b0708201029k5909d919vcf0deebae74a79c7@mail.gmail.com>
	<93066C069973ED448DC2BCEA9C44A7383BE2B4@efmailx>
Message-ID: <2dc0c81b0708201207p7f83f2e0l6de15fd70be252a5@mail.gmail.com>

Hopefully this will help (using your input file)

#!/usr/bin/env python
import re
buildinfo = "input.txt"
input = open(buildinfo, 'r')

regex = re.compile(r"^\s*build.number=(\d+)\s*$")

for line in input:
    if re.search(regex, line):
        print line
        buildNum = re.sub(r"^\s*build.number=(\d+)\s*$", "\\1", line)
        print line
        print buildNum


From jon+usenet at unequivocal.co.uk  Fri Aug 31 06:05:34 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 31 Aug 2007 10:05:34 GMT
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<1188497498.3468.60.camel@dot.uniqsys.com>
	<mailman.188.1188546300.28954.python-list@python.org>
	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
	<1188551958.728836.137370@x35g2000prf.googlegroups.com>
	<fOadnfwlCJbQfErbnZ2dnUVZ_jCdnZ2d@speakeasy.net>
Message-ID: <slrnfdfpve.ldo.jon+usenet@snowy.squish.net>

On 2007-08-31, Erik Max Francis <max at alcyone.com> wrote:
>> I say the 'oll' in troll like the 'ol' in frolic, and pronounce roll
>> and role similarly.
>>
>> My accent is probably from the East Midlands of the UK, but is not
>> pronounced.
>
> _Troll_ and _frolic_ aren't pronounced with the same "o" sound in any 
> accent I've ever heard of.

Welcome to England!

> Which you pronounce _boat_ and _bot_ the same way, too?

No. HTH HAND.


From dogatemycomputer at gmail.com  Mon Aug 20 16:48:36 2007
From: dogatemycomputer at gmail.com (dogatemycomputer at gmail.com)
Date: Mon, 20 Aug 2007 13:48:36 -0700
Subject: urllib2.urlopen(url) pulling something other than HTML
In-Reply-To: <1187641080.516885.122350@g4g2000hsf.googlegroups.com>
References: <1187635452.841155.88720@a39g2000hsc.googlegroups.com>
	<1187641080.516885.122350@g4g2000hsf.googlegroups.com>
Message-ID: <1187642916.824037.298750@o80g2000hse.googlegroups.com>


Those responses were both very helpful.  John's additional type
checking is straight forward and easy to implement.  I will also
rewrite the application a second time using the class Gabriel
offered.  Both of these suggestions will help gain some insight into
how Python works.

"Don't even try to understand it - it's a mess. Use the HTMLParser
module instead."

I personally think the application itself "feels" more complicated
than it needs to be but its possible that is just my inexperience. I'm
going to do some reading about the HTMLParser module.  I'm sure I
could make this spider a bit more functional in the process.

Thank you again for all of your help!!



From sbellon at sbellon.de  Sat Aug 11 06:16:30 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Sat, 11 Aug 2007 12:16:30 +0200
Subject: Destruction of generator objects
References: <20070808002852.6228ae91@cube.tz.axivion.com>
	<1186613044.494852.306970@q75g2000hsh.googlegroups.com>
	<20070809011441.05d7dfb6@cube.tz.axivion.com>
	<1186819365.988117.232230@g4g2000hsf.googlegroups.com>
Message-ID: <20070811121630.1b010eab@cube.tz.axivion.com>

On Sat, 11 Aug, Kay Schluehr wrote:
> On Aug 9, 1:14 am, Stefan Bellon <sbel... at sbellon.de> wrote:

> > Sorry, I forgot to mention that I am forced to using Python 2.4.

> It doesn't matter. You can use try...finally as well in Python 2.4.
> It's just not possible to use except and finally clauses in one
> statement such as:

[snip]

The problem is yield inside try-finally which is not possible in 2.4.

-- 
Stefan Bellon


From paul at subsignal.org  Wed Aug 22 09:30:09 2007
From: paul at subsignal.org (paul)
Date: Wed, 22 Aug 2007 15:30:09 +0200
Subject: Fast socket write
In-Reply-To: <1187787707.377952.322280@57g2000hsv.googlegroups.com>
References: <1187744469.240933.149610@r23g2000prd.googlegroups.com>	<46cba22b$1_1@news.chariot.net.au>
	<1187787707.377952.322280@57g2000hsv.googlegroups.com>
Message-ID: <fahdou$i8r$1@sea.gmane.org>

Greg Copeland schrieb:
> On Aug 21, 9:40 pm, Bikal KC <nepbabucxspamf... at yahoo.ca> wrote:
>> Greg Copeland wrote:
>>> I'm having a brain cramp right now.  I can't see to recall the name of
>> Is your cramp gone now ? :P
> 
> 
> I wish.  If anyone can remember the name of this module I'd realy
> appreciate it.
http://tautology.org/software/python-modules/sendfile probably...



From aleax at mac.com  Sun Aug 19 01:48:32 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 18 Aug 2007 22:48:32 -0700
Subject: How to call module functions inside class instance functions?
References: <1187484041.838615.259980@e9g2000prf.googlegroups.com>
	<mailman.2154.1187486317.22759.python-list@python.org>
	<1187487622.450655.265000@q4g2000prc.googlegroups.com>
Message-ID: <1i32cjp.1nqwivj14fwim3N%aleax@mac.com>

beginner <zyzhu2000 at gmail.com> wrote:
   ...
> testmodule.py
> -----------------
> """Test Module"""
> 
> def __module_level_func():
>     print "Hello"
> 
> class TestClass:
>     def class_level_func(self):
>         __module_level_func()
> 
> 
> main.py
> ------------------
> import testmodule
> 
> x=testmodule.TestClass()
> x.class_level_func()
> 
> 
> The error message I am encountering is: NameError: global name
> '_TestClass__module_level_func' is not defined
> 
> I think it has something to do with the two underscores for
> __module_level_func. Maybe it has something to do with the python
> implementation of the private class level functions.
> 
> By the way, the reason I am naming it __module_level_func() is because
> I'd like __module_level_func() to be private to the module, like the C
> static function. If the interpreter cannot really enforce it, at least
> it is some sort of naming convention for me.

The two underscores are exactly the cause of your problem: as you see in
the error message, the compiled has inserted the CLASS name (not MODULE
name) implicitly there.  This "name mangling" is part of Python's rules.

Use a SINGLE leading underscore (NOT double ones) as the "sort of naming
convention" to indicate privacy, and Python will support you (mostly by
social convention, but a little bit technically, too); use a different
convention (particularly one that fights against the language rules;-)
and you're "fighting city hall" to no good purpose and without much hope
of achieving anything whatsoever thereby.


Alex


From __peter__ at web.de  Fri Aug 17 17:21:43 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 17 Aug 2007 23:21:43 +0200
Subject: Array and floating point
References: <1187384816.251783.95410@19g2000hsx.googlegroups.com>
Message-ID: <fa53h9$qbe$02$1@news.t-online.com>

Jonathan Shan wrote:

> Hello,
> 
> I'm experiencing a problem where the float being appended to the array
> is not the same as the result of the appending.
> 
>>>> from array import *
>>>> x = array('f')
>>>> x.append(float("0.1"))
>>>> x[0]
> 0.10000000149011612
>>>> float("0.1")
> 0.10000000000000001
> 
> I'm expecting x[0] = 0.10000000000000001

array("f") is an array of C floats while Python's float type is a double in
C terms. That's why you lose some precision. Try array("d") instead:

>>> from array import array
>>> x = array("d")
>>> x.append(0.1)
>>> x[0]
0.10000000000000001


Peter


From limodou at gmail.com  Sun Aug 19 00:03:33 2007
From: limodou at gmail.com (limodou)
Date: Sun, 19 Aug 2007 12:03:33 +0800
Subject: ANN: UliPad 3.7 released!
Message-ID: <505f13c0708182103k41ffabc9wcb1009538a76c10a@mail.gmail.com>

UliPad is a flexible editor, based on wxPython. It's has many features,just
like:class browser, code auto-complete, html viewer, directory browser, wizard,
etc. The main feature is the usage of mixin. This makes UliPad can be
extended easily. So you can write your own mixin or plugin, or simple script,
these can be easy and seamless integrated with UliPad.

What's new in 3.7
===================

New Features and Changes:

#. Add PEP8 sytle checking
#. Enhance calltip showing
#. Add a new option in Preference, which is used for when you toggle comment
lines(Ctrl+/ or Ctrl+\) if it'll popup a comment dialog. You can find it in
Preference->Document->Show comment character dialog when adding comment.
#. Saving auto todo window status
#. Changing shortcut of quote dialog from Ctrl+Q to Ctrl+'
#. Changing the number of recent files to 20
#. Changing shortcut Ctrl+Alt+L to Alt+Z, Ctrl+Alt+B to Alt+X
#. Saving the status of Message window word wrap
#. Saving the snippets window position
#. The results of find in files can only show the filenames and you can copy
them to clipboard
#. Add Spanish language translation and Traditional Chinese language translation
#. Using ZestyParser Module to parse the source code syntax
#. Improving input assistant functionality
#. Adding config.txt documentation
#. When saving files, automatically adding accordingly filename suffix
#. Adding mixin reload mechanism, it will be very useful when developing
#. Adding folder sort functionality when adding new folder to directory browser
window
#. Adding template in input assistant, and you can press TAB key to jump to the
next field. The template just like: ${1:something}.
#. Adding LUA syntax support
#. Adding mako(template module) support plugin
#. Adding batch filenames rename plugin
#. Enable ftp window be openned left or bottom pane according to the openning
position
#. Adding Alt+R shortcut for open recently files
#. Merging new 1.20 version winpdb to ulipad


Bug fix:

#. Fix ctag support bug
#. Fix default style bug
#. Fix the wrong cursor jumping after undo operating
#. Fix xml lexer type bug
#. Fix copying bug when the text block has no indent
#. Fix openning multi-view bug from menu items
#. Fix the input focus losing bug when openning bottom pane or double-click on
directory browser entries
#. Fix user can open multi find dialogs bug
#. Fix register functionality in windows

UliPad has been ported to code.google.com, so you can visit the new
project site at:
http://code.google.com/p/ulipad, and also visit the new svn address. Recommends
using source version.

Source Code: http://ulipad.googlecode.com/files/ulipad.3.7.zip
Win Execute Code: http://ulipad.googlecode.com/files/ulipad.3.7.exe

If you have any suggestion or question, please subscribe the ulipad
mailling list: http://groups.google.com/group/UliPad

-- 
I like python!
UliPad <<The Python Editor>>: http://code.google.com/p/ulipad/
My Blog: http://www.donews.net/limodou


From stefan.behnel-n05pAM at web.de  Thu Aug 30 15:28:30 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Thu, 30 Aug 2007 21:28:30 +0200
Subject: Simple elementtree question
In-Reply-To: <1188495178.701968.246690@50g2000hsm.googlegroups.com>
References: <1188495178.701968.246690@50g2000hsm.googlegroups.com>
Message-ID: <46D71A5E.1000005@web.de>

IamIan wrote:
> This is in Python 2.3.5. I've had success with elementtree and other
> RSS feeds, but I can't get it to work with this format:
> 
> <?xml version="1.0"?><rdf:RDF
>  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
>  xmlns:dc="http://purl.org/dc/elements/1.1/"
>  xmlns:fr="http://ASPRSS.com/fr.html"
>  xmlns:pa="http://ASPRSS.com/pa.html"
>  xmlns="http://purl.org/rss/1.0/">
> <channel rdf:about="http://www.sample.com">
> <title>Example feed</title>
[...]
> </rdf:RDF>
> 
> What I want to extract is the text in the title and link tags for each
> item (eg. <title>First story</title> and <link>http://www.sample.com/
> news/20000/news.htm</link>). Starting with the title, my test script
> is:
> 
> import sys
> from urllib import urlopen
> 
> import elementtree.ElementTree as ET
> 
> news = urlopen("http://www.sample.com/rss/rss.xml")
> nTree = ET.parse(news)
> for item in nTree.getiterator("title"):
>   print item.text
> 
> Whether I try this for title or link, nothing is printed.

Your document uses namespaces. What you are looking for is not the tag "title"
without a namespace, but the tag "{http://purl.org/rss/1.0/}title" with the
default namespace.

http://effbot.org/zone/element.htm#xml-namespaces

Stefan


From sdoty044 at gmail.com  Wed Aug  8 17:12:08 2007
From: sdoty044 at gmail.com (sdoty044 at gmail.com)
Date: Wed, 08 Aug 2007 14:12:08 -0700
Subject: help a n00b with a Zope site-package install
Message-ID: <1186607528.256756.209030@i38g2000prf.googlegroups.com>

I am having a general problem getting Zope installed as part of my
linux distro.

Sadly, I have always used Python on Windows, and now I am have to do
some work for Linux.

My goal is to compile a SuSE linux distro of Python with all the same
site-packages that I am using on Windows.  The only thing I am having
issues with is Zope.

Using Yast is not an option... for I am stuck using SLES 9... and I am
running with Python 2.4 and 2.5.  SLES 9 only has packages for Python
2.3.



From carsten at uniqsys.com  Wed Aug  1 08:19:41 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 01 Aug 2007 08:19:41 -0400
Subject: Plain old SAX and minidom useable? But how then?
In-Reply-To: <1185969539.653078.287360@w3g2000hsg.googlegroups.com>
References: <1185969539.653078.287360@w3g2000hsg.googlegroups.com>
Message-ID: <1185970781.3370.14.camel@dot.uniqsys.com>

On Wed, 2007-08-01 at 04:58 -0700, Dobedani wrote:
> [...]
> "Nelson says: There's the stock Python install, which barely does
> anything [for XML]. That's overstated. Plain old SAX and minidom may
> not be ideal, but they're useable."
> 
> Please: where then can I find examples of such use? If I cannot use
> xpath, I would not mind to browse a bit - e.g. using functions like
> getElementByTag() but I don't even know how to use those. TIA

Here's a micro-tutorial:

>>> import xml.dom.minidom
>>> contents = """\
... <root>
...   <thing>Parrot</thing>
...   <thing class="special">Holy Grail</thing>
... </root>"""
>>> dom = xml.dom.minidom.parseString(contents)
>>> things = dom.getElementsByTagName("thing")
>>> print things[0].childNodes
[<DOM Text node "Parrot">]
>>> print things[0].childNodes[0].nodeValue
Parrot
>>> print things[0].hasAttribute("class")
False
>>> print things[0].getAttribute("class")

>>> print things[1].childNodes
[<DOM Text node "Holy Grail">]
>>> print things[1].childNodes[0].nodeValue
Holy Grail
>>> print things[1].hasAttribute("class")
True
>>> print things[1].getAttribute("class")
special

There's also the online documentation at
http://docs.python.org/lib/module-xml.dom.minidom.html

Hope this helps,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From Brian.McCann at viziant.net  Fri Aug 24 09:03:30 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Fri, 24 Aug 2007 09:03:30 -0400
Subject: how to tar with python
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE2EF@efmailx>

Hi,
 
I'm trying to tar the contents of a directory "test" which contains
3 files     foo1.xml ,foo2.xml, foo3.xml
 
in my current directory /home/pythonbox/tmp I have the directory "test"
 
if I run the below script it fails with the below error, but the files exist in the directory test
any help would be greatly appreciated
--Brian
 
##################################
[tmp]$ ./tarup.py
Traceback (most recent call last):
  File "./tarup.py", line 29, in ?
    tfile .add(f)
  File "/usr/lib64/python2.4/tarfile.py", line 1229, in add
    tarinfo = self.gettarinfo(name, arcname)
  File "/usr/lib64/python2.4/tarfile.py", line 1101, in gettarinfo
    statres = os.lstat(name)
OSError: [Errno 2] No such file or directory: 'viz2.xml'

###################################
import string
import os
import shutil
import tarfile


tfile = tarfile.open("files.tar.gz", 'w:gz')
files = os.listdir("test")
for f in files:
        tfile .add(f)
tfile.close
 
 
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From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug 22 08:12:58 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 22 Aug 2007 14:12:58 +0200
Subject: Where we need to use Python ?
In-Reply-To: <1187596936.136499.200280@l22g2000prc.googlegroups.com>
References: <1187596936.136499.200280@l22g2000prc.googlegroups.com>
Message-ID: <46cc281a$0$400$426a74cc@news.free.fr>

gperumal at gmail.com a ?crit :
> Hi
> 
> Iam new to Python
> I know Perl, JScript,C,C++,Java
> But i want to know where excatly this python come in to picture

Somewhere between Perl and Java.

> And Is it a interpreted language or a programming language

??? It's obviously a programming language, but this has nothing to do 
with interpreted vs compiled - which FWIW is a property of an 
implementation, not of a language.

Actually, most Python implementations are compiled to byte-code 
(specific one for CPython, JVM byte-code for Jython, CLR byte-code for 
Iron-Python).


From sentientholon at gmail.com  Wed Aug 22 16:36:07 2007
From: sentientholon at gmail.com (Frederick Polgardy)
Date: Wed, 22 Aug 2007 20:36:07 -0000
Subject: Learning Python using a book based on version 1.5
In-Reply-To: <1187814437.775758.159510@e9g2000prf.googlegroups.com>
References: <1187814437.775758.159510@e9g2000prf.googlegroups.com>
Message-ID: <1187814967.887137.123050@q4g2000prc.googlegroups.com>

On Aug 22, 3:27 pm, "dogatemycompu... at gmail.com"
<dogatemycompu... at gmail.com> wrote:
> Greetings,
>
> A friend of mine dropped off a copy of Sams Teach Yourself Python in
> 24 Hours published in 2000.  I skimmed the first couple of chapters
> looking for the interpreter version and the book was based on version
> Python version 1.5.
>
> Is this book still relevant?   Should I toss it and look for something
> newer?

Yes, you should really toss it.  I mean, sure, there's a lot of Python
1.5 that's still here, but there have been major changes in every
minor version since 2.0.

Fred



From steve at holdenweb.com  Mon Aug  6 19:22:12 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Aug 2007 19:22:12 -0400
Subject: maybe a popen question... or something else?
In-Reply-To: <1186441210.383700.301790@i13g2000prf.googlegroups.com>
References: <1186441210.383700.301790@i13g2000prf.googlegroups.com>
Message-ID: <46B7AD24.4010305@holdenweb.com>

dude wrote:
> Working on Windows XP
> Say I have a Windows executable, foo.exe.
> foo.exe is a command line tool that can take a number of different
> arguments and perform corresponding actions.
> 
> I want to invoke foo.exe from a Python script (using whatever will
> work best).  I want to continuously pass arguments to foo.exe in
> between doing other stuff from within my Python script.
> 
> Some pseudo code:
> 
> processHandle = invoke("foo.exe") # what python module should "invoke"
> be here?
> 
> doUnrelatedStuff()
> 
> processHandle.passArgs("arg1 arg2") # The same foo.exe I invoked above
> gets these args for processing
> 
> doMoreUnrelatedStuff()
> 
> processHandle.passArgs("arg3 arg4") # The same foo.exe I invoked above
> gets these args for processing
> 
> processHandle.close() # "foo.exe is destroyed"
> 
> Thanks for any help.
> 
When you say "pass arguments", the methodology you outline definitely 
isn't going to fly with argument passing. When a command is invoked the 
arguments are taken from the command line, so it isn't possible to pass 
further arguments at a later time.

You probably need to write to you sub-process's standard input stream. 
which you can do whit the subprocess module (the modern way to do it) or 
one of the various popen() functions.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From yan.python at gmail.com  Tue Aug 14 02:21:24 2007
From: yan.python at gmail.com (yan.python at gmail.com)
Date: Tue, 14 Aug 2007 06:21:24 -0000
Subject: how to  move cursor in Interactive Interpreter
Message-ID: <1187072484.626674.157200@x40g2000prg.googlegroups.com>

i  have a question.
when i run Interactive Interpreter in linux command promt,how can i
move the cursor.
for example,when i enter a string,i often enter the quotation mark ""
first,and the move the cursor inside the mark to enter the string,in
windows,it is ok.but when i do that in linux,pressing the "left" key
will just print "^[[D" in the screen ,but not what i want.
so , how can i move the cursor Interactive Interpreter in linux?
 i've googled and find nothing useful.who i tell me what to do?



From a.schmolck at gmail.com  Mon Aug 13 13:49:19 2007
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: Mon, 13 Aug 2007 18:49:19 +0100
Subject: Fatest standard way to sum bytes (and their squares)?
References: <NPmdnVwqHa74TyPbnZ2dnUVZ_uKpnZ2d@speakeasy.net>
	<yfs643l84fu.fsf@gmail.com>
	<ntGdnTiqYbjGPyLbnZ2dnUVZ_gadnZ2d@speakeasy.net>
	<yfsps1r5tap.fsf@gmail.com>
Message-ID: <yfsvebj495s.fsf@gmail.com>


Alexander Schmolck <a.schmolck at gmail.com> writes:

> Erik Max Francis <max at alcyone.com> writes:
>
>> Alexander Schmolck wrote:
>>
>>> Is this any faster?
>>>
>>>  ordSum, orsSumSq = (lambda c:c.real,c.imag)(sum(complex(ord(x),ord(x)<<1)
>>> for x in data))
>>
>> That's pretty clever, but I neglected to mention that I need to accumulate the
>> sums as ints/longs to avoid losing precision, so converting to floating point
>> isn't an optional.
>
> I think you can safely use this trick (provided it really makes things faster)
> provided you sum blocks no larger than 2**(53-8) bytes; 

Forgot about the squares; make this 2**(53-16); still pretty big.

'as


From paddy3118 at googlemail.com  Wed Aug 22 00:38:43 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Tue, 21 Aug 2007 21:38:43 -0700
Subject: defaultdict of arbitrary depth
In-Reply-To: <1187321113.841198.195100@22g2000hsm.googlegroups.com>
References: <1187321113.841198.195100@22g2000hsm.googlegroups.com>
Message-ID: <1187757523.509143.218730@x35g2000prf.googlegroups.com>

On Aug 17, 4:25 am, Paul McGuire <pt... at austin.rr.com> wrote:
> In responding to another post on defaultdict, I posted an
> implementation of a 2-level hashtable, by creating a factory method
> that returned a defaultdict(dict).  The OP of that other thread was
> trying to build a nested tree from a set of n-tuples, in which the
> first (n-1) values in each tuple were the keys for navigating down the
> tree, and the final n'th value was the value for to be assigned to the
> leaf node.  My post worked only if n=2, which fortunately was the test
> case that the OP gave.  But it annoyed me that this required advance
> knowledge of the number of keys.
>
> I've hacked out this recursivedefaultdict which is a
> defaultdict(defaultdict(defaultdict(...))), arbitrarily deep depending
> on the keys provided in the reference.
>
> Please comment.
>
> -- Paul
>
> from collections import defaultdict
>
> data = [
>     ('A','B','Z',1), ('A','C','Y',2), ('A','C','X',3),
>     ('B','A','W',4), ('B','B','V',5), ('B','B','U',6),
>     ('B','D','T',7),
>     ]
>
> class recursivedefaultdict(object):
>     def __init__(self):
>         self.__dd = defaultdict(recursivedefaultdict)
>     def __getattr__(self,attr):
>         return self.__dd.__getattribute__(attr)
>     def __getitem__(self,*args):
>         return self.__dd.__getitem__(*args)
>     def __setitem__(self,*args):
>         return self.__dd.__setitem__(*args)
>
> table = recursivedefaultdict()
>
> for k1,k2,k3,v in data:
>     table[k1][k2][k3] = v
>
> for kk in sorted(table.keys()):
>     print "-",kk
>     for jj in sorted(table[kk].keys()):
>         print "  -",jj
>         for ii in sorted(table[kk][jj].keys()):
>             print "    -",ii,table[kk][jj][ii]
>
> prints:
> - A
>   - B
>     - Z 1
>   - C
>     - X 3
>     - Y 2
> - B
>   - A
>     - W 4
>   - B
>     - U 6
>     - V 5
>   - D
>     - T 7

There is something here:
  http://groups.google.com/group/comp.lang.python/msg/92502e0278c2a56e

- Paddy.



From thomas at jollans.com  Sun Aug 19 18:40:40 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Mon, 20 Aug 2007 00:40:40 +0200
Subject: Syntax Question - list multiplication
In-Reply-To: <1187560273.146491.90530@r29g2000hsg.googlegroups.com>
References: <1187560273.146491.90530@r29g2000hsg.googlegroups.com>
Message-ID: <200708200040.45740.thomas@jollans.com>

On Sunday 19 August 2007, Pablo Torres wrote:
> Hi guys!
>
> I am working on Conway's Game of Life right now and I've run into a
> little problem.
>
> I represent dead cells with 0s and live ones with 1s. Check this out:
> 	>>> grid = [[0] * 3] * 3
> 	>>> grid
>
> 	[[0, 0, 0], [0, 0, 0], [0, 0, 0]]
>
> 	>>> grid[0][0] = 1
>
> 	[[1, 0, 0], [1, 0, 0], [1, 0, 0]]
>
> Now, that's not what I want. I just want the first element of the
> first sublist to be a 1, not the first of every one. Here's what I
> tried and didn't work:
>
> 0.  grid = [[0] * 3][:] * 3    then the same grid[0][0] = 1 statement
> 1.  grid = [[0][:] * 3] * 3    followed by the same assignment
> 2.  (grid[0])[0] = 1    with the original initialization of the grid
>
> So, that means that it isn't a problem with two different variables
> refering to the same list (0. and 1. prove that). What I don't
> understand is why 2. doesn't work either. I'm baby-feeding my
> instructions to Python and the mistake is still there. Any ideas?


If you want three copies of the list, you need to copy it thrice (well, twice)

Thus:

>>> row = [0] * 3
>>> grid = []
>>> for n in xrange(3): grid.append(row[:])
...
>>> grid
[[0, 0, 0], [0, 0, 0], [0, 0, 0]]
>>> grid[0][0] =1
>>> grid
[[1, 0, 0], [0, 0, 0], [0, 0, 0]]
>>>


-- 
      Regards,                       Thomas Jollans
GPG key: 0xF421434B may be found on various keyservers, eg pgp.mit.edu
Hacker key <http://hackerkey.com/>:
v4sw6+8Yhw4/5ln3pr5Ock2ma2u7Lw2Nl7Di2e2t3/4TMb6HOPTen5/6g5OPa1XsMr9p-7/-6
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From rdm at rcblue.com  Sun Aug 19 17:21:14 2007
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 19 Aug 2007 14:21:14 -0700
Subject: Hot subject: a good python editor and/or IDE?
Message-ID: <20070819212123.DDE1B1E4014@bag.python.org>

At 02:47 AM 8/19/2007, S?bastien wrote:
>Hi folks,
>
>I am currently using Eclipse+PyDev when developping Python projects but
>I lack a fast, simple editor for tiny bit of scripts. So here is my
>question: what is, for you, the current best ( but still kind of light!
>) Python editor/IDE ? A tiny precision, I am on Ubuntu so I am looking
>for a linux compatible editor.

I thought Ulipad WAS linux-compatible. Isn't it?

Dick Moores
XP, Python 2.5, editor is Ulipad



======================================
                       Bagdad Weather
<http://weather.yahoo.com/forecast/IZXX0008_f.html>  



From python at jayloden.com  Wed Aug  8 03:15:05 2007
From: python at jayloden.com (Jay Loden)
Date: Wed, 08 Aug 2007 03:15:05 -0400
Subject: Seek the one billionth line in a file containing 3 billion lines.
In-Reply-To: <7xzm12o7o7.fsf@ruckus.brouhaha.com>
References: <1186554220.272488.134780@d55g2000hsg.googlegroups.com>
	<7xzm12o7o7.fsf@ruckus.brouhaha.com>
Message-ID: <46B96D79.9050100@jayloden.com>

Paul Rubin wrote:
> Sullivan WxPyQtKinter <sullivanz.pku at gmail.com> writes:
>> This program:
>> for i in range(1000000000):
>>       f.readline()
>> is absolutely every slow....
> 
> There are two problems: 
> 
>  1) range(1000000000) builds a list of a billion elements in memory,
>     which is many gigabytes and probably thrashing your machine.
>     You want to use xrange instead of range, which builds an iterator
>     (i.e. something that uses just a small amount of memory, and
>     generates the values on the fly instead of precomputing a list).
> 
>  2) f.readline() reads an entire line of input which (depending on
>     the nature of the log file) could also be of very large size.
>     If you're sure the log file contents are sensible (lines up to
>     several megabytes shouldn't cause a problem) then you can do it
>     that way, but otherwise you want to read fixed size units.

If we just want to iterate through the file one line at a time, why not just:

count = 0
handle = open('hugelogfile.txt')
for line in handle.xreadlines():
    count = count + 1
    if count == '1000000000':
        #do something


My first suggestion would be to split the file into smaller more manageable
chunks, because any type of manipulation of a multi-billion line log file is
going to be a nightmare. For example, you could try the UNIX 'split' utility to
break the file into individual files of say, 100000 lines each. split is likely
to be faster than anything in Python, since it is written in C with no
interpreter overhead etc.

Is there a reason you specifically need to get to line 1 billion, or are you
just trying to trim the file down? Do you need a value that's on that particular
line, or is there some other reason? Perhaps if you can provide the use case the
list can help you solve the problem itself rather than looking for a way to seek
to the one billionth line in a file.

-Jay


From byte8bits at gmail.com  Fri Aug 10 12:08:32 2007
From: byte8bits at gmail.com (brad)
Date: Fri, 10 Aug 2007 12:08:32 -0400
Subject: The Future of Python Threading
In-Reply-To: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
Message-ID: <f9i2ks$3m3$1@solaris.cc.vt.edu>

Justin T. wrote:
> Hello,
> 
> While I don't pretend to be an authority on the subject, a few days of
> research has lead me to believe that a discussion needs to be started
> (or continued) on the state and direction of multi-threading python.

This is all anecdotal... threads in Python work great for me. I like 
Ruby's green threads too, but I find py threads to be more robust. We've 
written a tcp scanner (threaded connects) and can process twenty ports 
on two /16s (roughly 171K hosts) in about twenty minutes. I'm happy with 
that. However, that's all I've ever really used threads for, so I'm 
probably less of an expert than you are :) I guess it comes down to what 
you're doing with them.

Brad


From i_hate_jews at shiftmail.com  Mon Aug 27 03:13:17 2007
From: i_hate_jews at shiftmail.com (Nenad Milicevic - The Aryan Serb)
Date: Mon, 27 Aug 2007 00:13:17 -0700
Subject: Let's Unite Against Jews and Mongrels!
Message-ID: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>

Rise up and shine, white sons and daughters
Rise up and shine, you gotta fight to part those waters
When we swim in the light, all will be okay
The black, yellow and brown man will wash away.
------------------------------
Let's break the chains of Jewish and black domination! Unite, white
brothers and sisters, and let's defeat those who oppress our white
heritage!

Our skin is our uniform!


Serbian Committee for Aryan Defence
Nenad Milicevic, executive
Usenet name: Raoul Endymion or Raul Endymion
ICQ 208030128
endymion at deadspam.com
endimion at myrealbox.com
Belgrade, Serbia



From kyosohma at gmail.com  Mon Aug 20 14:34:55 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 20 Aug 2007 11:34:55 -0700
Subject: str().join() isn't working
In-Reply-To: <mailman.4.1187633821.32294.python-list@python.org>
References: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com>
	<mailman.4.1187633821.32294.python-list@python.org>
Message-ID: <1187634895.387910.179500@m37g2000prh.googlegroups.com>

On Aug 20, 1:16 pm, "Robert Dailey" <rcdai... at gmail.com> wrote:
> here is a more realized example of the lists I'm trying to join:
>
> _user_includes = [
>         "../src",
>         "../resource",
>         "../inc",
>         "../src",
>         "../data",
>         "../gui",
>         "../script",
>         "../script/actions",
>         "../gui/dispatch",
>         "../gui/factories",
>         "../gui/frames",
>         "../gui/getters",
>         "../gui/localization",
>         "../gui/player",
>         "../gui/setters",
>         "../gui/utilities",
>         "../sis",
>         "../player",
>         "../platform/ngi",
>         "../../engine",
>         "../../engine/audio/NGI",
>         "../../engine/io",
>         "../../engine/io\NGI",
>         "../../engine/math",
>         "../../engine/math/fixed",
>         "../../engine/path/NGI",
>         "../../engine/text/NGI",
>         "../../engine/mem",
>         "../../engine/text",
>         "../../engine/observer",
>         "../../sdk/tiny_xml",
>         "../../sdk/zlib",
>         "../../sdk/lpng",
>         "../../sdk/IFDLib/Source/Precompile",
>         "../../sdk/IFDLib/Source/CoreLib",
>         "../../sdk/IFDLib/inc",
>         "../../sdk/IFDLib/Source/UtilLib",
>         "../../sdk/IFDLib/Source/GameLib",
>         "../../sdk/IFDlib/Source/OSLib/_NGI",
>         "../../sdk/stl-port/NGI",
>         "../../sdk/mini-boost/NGI",
>         "../../sdk/mini-boost/COMMON",
>         ]
>
> _system_includes = [
>         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include",
>         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include/osextensions/rga",
>         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include/osextensions/stdapis",
>         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include/osextensions/stdapis/stlport",
>         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/epoc32/include/variant"
>         ]
>
> On 8/20/07, Robert Dailey <rcdai... at gmail.com> wrote:
>
> > Hi,
>
> > First have a look at the following code:
>
> > In main.py:
> > -----------------------------------------------------------------------------------
> >     space = " "
>
> >     includes = space.join ( system._user_includes ) + " " + space.join(
> > system._system_includes )
>
> > In system.py:
> > -----------------------------------------------------------------------------------
> > _user_includes = [
> >     ]
>
> > _system_includes = [
> >     ]
>
> > The above does not work. The interpreter states: "TypeError: sequence item
> > 0: expected string, list found". I'm not sure what this means. Can anyone
> > help me figure out what I'm doing wrong? Thanks.
>
> > PS: I've also tried putting strings in the lists above just to make sure
> > that them being empty wasn't the problem. I got no different results.

When you use join, you join the items in the list with each other to
form one long string. In your statement, your script tries to
concatenate 2 lists to each other before it does the join, which is
impossible in Python. The "+" operator is only for addition and for
two or more strings.

See http://www.faqs.org/docs/diveintopython/odbchelper_join.html for
more information on joins.

Mike



From jzgoda at o2.usun.pl  Fri Aug 10 17:39:39 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Fri, 10 Aug 2007 23:39:39 +0200
Subject: Python Dies on "make install"
In-Reply-To: <pan.2007.08.10.21.01.56.706157@fartknuckle.com>
References: <pan.2007.08.10.21.01.56.706157@fartknuckle.com>
Message-ID: <f9im89$3tf$1@nemesis.news.tpi.pl>

fartknuckle napisa?(a):

> When I try to build and install python from source It configures and 
> makes fine but upon 'make install' I always get to this
> point:
> 
> 
> 
> Listing /usr/local/lib/python2.5/xml/sax ...
> Compiling /usr/local/lib/python2.5/xml/sax/__init__.py ...
> Compiling /usr/local/lib/python2.5/xml/sax/_exceptions.py ...
> Compiling /usr/local/lib/python2.5/xml/sax/expatreader.py ...
> Compiling /usr/local/lib/python2.5/xml/sax/handler.py ...
> Compiling /usr/local/lib/python2.5/xml/sax/saxutils.py ...
> Compiling /usr/local/lib/python2.5/xml/sax/xmlreader.py ...
> Compiling /usr/local/lib/python2.5/xmllib.py ...
> Compiling /usr/local/lib/python2.5/xmlrpclib.py ...
> Compiling /usr/local/lib/python2.5/zipfile.py ...
> make: *** [libinstall] Error 1                     
> 
> 
> 
> I am currently trying to install 2.5.1. I get the error no matter what the
> version is. Does anyone have an idea what may be causing this?
> 
> I have gone through the config.log and found no errors concerning
> zipfile.py or zipfile or zip. I am thinking the error is the next command
> after the zipfile.py installation because I can go into 
> /usr/local/lib/python2.5 and zipfile.py is installed.
> 
> Any help much appreciated.

I saw this (and reported this issue in SF's tracker) at some time around
2.2/2.3 (just cann't recall). I don't know what causes this problem
exactly, but in my case the installation succeeded if I removed prevoius
python's library directory (/usr/lib/python2.x or
/usr/local/lib/python2.x). The module that stopped installation was
exactly the same.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From raims at dot.com  Wed Aug 15 13:01:17 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Wed, 15 Aug 2007 19:01:17 +0200
Subject: All names in the current module
References: <87d4xowymq.fsf@wilson.homeunix.com>
Message-ID: <1i2whvw.1qje42i1bh18bkN%raims@dot.com>

Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
> How can I get a list with all classes defined in the current module?
> Thank you!

rhymes at groove ~ % cat > t.py
class A: pass

rhymes at groove ~ % python
Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04) 
[GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import t
>>> print dir(t)
['A', '__builtins__', '__doc__', '__file__', '__name__']

Now you have the list of names. To find out if they are actual classes
or not you can do this:

>>> import inspect
>>> for member in dir(t):
...     print member, inspect.isclass(getattr(t, member))
... 
A True
__builtins__ False
__doc__ False
__file__ False
__name__ False

HTH

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From rdm at rcblue.com  Sun Aug 12 12:34:42 2007
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 12 Aug 2007 09:34:42 -0700
Subject: Puzzled by "is"
In-Reply-To: <f9n8lb$cg9$1@sea.gmane.org>
References: <20070809194105.39BD11E400A@bag.python.org>
	<f9frbl$dps$1@sea.gmane.org>
	<mailman.1814.1186692638.22759.python-list@python.org>
	<87zm1042f0.fsf@benfinney.id.au>
	<mailman.1839.1186768658.22759.python-list@python.org>
	<87ir7l5bv4.fsf@benfinney.id.au>
	<d71c7ed60708120626y6d9a9edcnf007a5273de125cc@mail.gmail.com>
	<f9n8lb$cg9$1@sea.gmane.org>
Message-ID: <20070812163657.2F8F41E400B@bag.python.org>

At 08:23 AM 8/12/2007, Steve Holden wrote:
>Dick Moores wrote:
> > So would a programmer EVER use "is" in a script?
>
>Sure. For example, the canonical test for None uses
>
>      x is None
>
>because there is only ever one instance of type Nonetype, so it's the
>fastest test. Generally speaking you use "is" to test for identity (do
>these two expressions reference the same object) rather than equality
>(do these two expressions evaluate to equivalent objects).

Off the top of your head, could you or others give me as many 
examples as you can think of?

Thanks again,

Dick




From Shawn at Milochik.com  Thu Aug 16 11:42:40 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Thu, 16 Aug 2007 11:42:40 -0400
Subject: A problem with Time
In-Reply-To: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
References: <46c469be$0$66145$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <2dc0c81b0708160842n66258aa1p10f08c090af74950@mail.gmail.com>

import time


oneDay = 60 * 60 * 24 #seconds in one day

date = time.time()

yesterday = date - oneDay


From steve at holdenweb.com  Wed Aug 29 17:45:36 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 29 Aug 2007 17:45:36 -0400
Subject: re compiled object result caching?
In-Reply-To: <1188417101.936530.182480@50g2000hsm.googlegroups.com>
References: <1188417101.936530.182480@50g2000hsm.googlegroups.com>
Message-ID: <fb4pdt$3fu$1@sea.gmane.org>

Dan wrote:
> I find myself often using regular expressions in the following
> pattern:
> 
> foo_re = re.compile(r"foo(bar)")
> # . . .
> re_result = foo_re.search(line)
> if re_result:
>     bar = re_result.group(1)
>     # . . .
> 
> But, I keep thinking this is awkward, and I would kind of like to have
> the re object to cache its result; along the lines of:
> 
> foo_re = re.compile(r"foo(bar)")
> # . . .
> if foo_re.search(line):
>     foo_re.last_result().group(1)
> 
If you wanted to implement this I don't really see why a method call is 
necessary. It would surely only need to be a simple attribute?

Of course you then introduce the possibility that someone will reference 
if before using the RE in a search, plus it still requires separate 
storage if you want the ability to use the same RE for two different 
matches and compare the match results.

> I realize I could do this with a wrapper object (I'm not sure if I can
> subclass the re object..), but I was wondering what the community
> thought of this. Good idea? Bad? Would it be difficult to add to the
> standard re module? The only real downside I can think of is thread
> safety. The other practical benefit I can think of is situations like
> the following:
> 
> if unlikely_condition and foo_re.search(line):
>    # . . .
> 
> With the current implementation I think you would either have to do
> the search even if unlikely_condition is False, or you would have to
> do an annoying nested if. Is there another way to achieve this that
> I'm not thinking of?
> 
I see absolutely no reason why you can't create your own module with a 
compile function that produces an extended_RE object by compiling the RE 
passed as an argument and saving the compiled result. It can then 
delegate most method calls to the compiled RE, but extend certain of its 
methods to provide the behavior that you want.

Personally I think it's anti-Pythonic to abhor

matchobj = pat.match(...)

You throw some clarity out just for the sake of making the "no match" 
case a teeny bit faster and a minute amount more readable. But others' 
opinions may differ.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From yuxi at ece.gatech.edu  Mon Aug 13 23:52:39 2007
From: yuxi at ece.gatech.edu (Yu-Xi Lim)
Date: Mon, 13 Aug 2007 23:52:39 -0400
Subject: Icons for GUI development
In-Reply-To: <1187058129.306171.174590@g12g2000prg.googlegroups.com>
References: <1187058129.306171.174590@g12g2000prg.googlegroups.com>
Message-ID: <f9r8u5$4ba$1@news-int2.gatech.edu>

Benjamin wrote:
> I'm developing a mail client. Since GUI are usually improved with some
> icons, I'm looking for some. Because I'm not a very gifted artist I'm
> searching for a library of GPL or public domain icons. Any suggestions?
> 

I frequently use the Crystal icon set.
http://www.everaldo.com/crystal/


Also, a page of links I encountered recently which may help you:
http://www.snap2objects.com/2007/06/06/85-killer-resources-every-designer-should-know/


From klove at tax.ok.gov  Wed Aug 29 14:22:39 2007
From: klove at tax.ok.gov (Kenneth Love)
Date: Wed, 29 Aug 2007 13:22:39 -0500
Subject: Accessing docstrings at runtime?
Message-ID: <011b01c7ea69$95512fe0$e6003dcc@worf2>

How do I print the docstring for a class property?

When I run the code below, I get the docstring for the string module
and not the one I set for the property.

---------------------------------------------
# NOTE: Found in Python docs defining built-in functions (such as
#       property()).  FIXED: Bug in getx, setx, and delx where "__x"
#       was misreferenced as "_x".
class C(object):
    def __init__(self):
        self.__x = None
    def getx(self):
        return self.__x
    def setx(self, value):
        self.__x = value
    def delx(self):
        del self.__x
    x = property(getx, setx, delx, "I'm the 'x' property.")

if __name__ == "__main__"
    y = C()
    y.x = 'test'
    print y.x
    print y.x.__doc__
---------------------------------------------

I get the following output:

---------------------------------------------
test
str(object) -> string

Return a nice string representation of the object.
If the argument is a string, the return value is the same object.
---------------------------------------------

What am I doing wrong?

adTHANKSvance,
Kenneth Love

P.S. If I want a docstring and I do not want a delete function,
     do I just pass 'None' (minus quotes) for that parameter?

-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-  
Kenneth Love                   |         Oklahoma Tax Commission
DP Programmer/Analyst          |         Information Technology
(405) 522 - 5864               |         http://www.tax.ok.gov/
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-



From Brian.McCann at viziant.net  Wed Aug 29 14:46:03 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Wed, 29 Aug 2007 14:46:03 -0400
Subject: copying files 
References: <93066C069973ED448DC2BCEA9C44A7383BE30C@efmailx>
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE30D@efmailx>

 
<mailto:brian.mccann at viziant.net> 
one thing I just noticed is that when I run the script I get a new symbolic link
created in my current dir  TEST_HOME------>lib
--Brian
 

________________________________

From: python-list-bounces+brian.mccann=viziant.net at python.org on behalf of Brian McCann
Sent: Wed 8/29/2007 2:40 PM
To: python-list at python.org
Subject: copying files 


Hi,
 
with the code below I set a variable TEST_HOME to a path and the variable m to a path
in my current dir. 
I have a symbolic link setting m---->lib
when I run the script I get no errors and the lib dir with its 20 files does not get copied to /v01/test_home
any help would be greatly appreciated
 
--Brian

#!/usr/bin/python
import string
import os
import sys
import errno
import shutil
import tarfile
 
TEST_HOME = "/v01/test_home"
m = "./lib"
os.system("cp -r m TEST_HOME")


 
 
 
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From kyosohma at gmail.com  Mon Aug 20 10:51:10 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 20 Aug 2007 07:51:10 -0700
Subject: Newbee Question
In-Reply-To: <mailman.15.1187620149.26576.python-list@python.org>
References: <mailman.15.1187620149.26576.python-list@python.org>
Message-ID: <1187621470.484615.7010@i13g2000prf.googlegroups.com>

On Aug 20, 9:23 am, "HD1956" <hd7... at hotmail.com> wrote:
> This is probably a simple code. I am a truck driver who gets paid by
> stops and cases. I am trying to figure out how to code my stop pay. I
> get 40 cents per stop up to 22 stops, and $1.40 per stops after that.

def calc(num):
	if num < 23:
		return 0.4 * num
	else:
		overtime = num - 22
		x = 0.4 * 22
		x += overtime * 1.4
		return x

# Use your own brain next time

Mike



From Shawn at Milochik.com  Mon Aug 20 12:04:37 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Mon, 20 Aug 2007 12:04:37 -0400
Subject: regular expression dictionary search
In-Reply-To: <1187625295.287653.137080@r34g2000hsd.googlegroups.com>
References: <d6a0d8f10708181139m730d7aa6t1c9f6e624d6db9aa@mail.gmail.com>
	<mailman.25.1187624159.26576.python-list@python.org>
	<1187625295.287653.137080@r34g2000hsd.googlegroups.com>
Message-ID: <2dc0c81b0708200904y729d902blab403a4d5b5f9ec2@mail.gmail.com>

On 8/20/07, Paul McGuire <ptmcg at austin.rr.com> wrote:
> On Aug 20, 10:35 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> > #!/usr/bin/env python
> <snip>
> > if __name__ == "__main__":
> >
> >     print "The return for 'fred' : %s" % returnCode('fred')
> >     print "The return for 'silk' : %s" % returnCode('silk')
> >     print "The return for 'silky' : %s" % returnCode('silky')
> >     print "The return for 'hand' : %s" % returnCode('hand')
> >     print "The return for 'strand' : %s" % returnCode('strand')
> >     print "The return for 'bank' : %s" % returnCode('bank')
> >
>
> Shawn -
>
> All that copy/pasting has got to have carpal tunnel written all over
> it - DRY!
>
> tests = "fred silk silky hand strand bank".split()
> for test in tests:
>     print "The return for '%s' : %s" % (test, returnCode(test))
>
> -- Paul
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


You're right. Thanks for the correction. My wrists are shot as it is,
and it's easy enough in vim to copy & paste. You know how it is -- I
made one test line, then copied it to a second, then copied it to a
third... Guilty of not planning ahead. ;o)


From rgelfand2 at hotmail.com  Thu Aug  2 14:45:39 2007
From: rgelfand2 at hotmail.com (Roman)
Date: Thu, 02 Aug 2007 11:45:39 -0700
Subject: XML Processing
Message-ID: <1186080339.344993.167670@z24g2000prh.googlegroups.com>

Is there a package that converts a string that contains special
characters in xml to to literal value.  For instance, converts string
http://myhome/&param to http://myhome/&amp;param.

Thanks in advance



From http  Tue Aug 28 18:27:44 2007
From: http (Paul Rubin)
Date: 28 Aug 2007 15:27:44 -0700
Subject: Haskell like (c:cs) syntax
References: <fb25uh$gl9$1@online.de>
Message-ID: <7xr6lnxpjz.fsf@ruckus.brouhaha.com>

"Stefan Niemann" <stefan at 3niemann.de> writes:
> Is there a pattern matching construct in Python like (head : tail), meaning 
> 'head' matches the first element of a list and 'tail' matches the rest? I 
> could not find this in the Python documentation.

Python's lists are actually linear arrays.  You can subscript them,
i.e. x[0] is the first element, and slice them, i.e. x[1:] is all
elements after the first.  Note that x[1:] actually makes a new
array and copies all the elements of x.  

Normally in Python one writes iterative loops rather than recursing
or folding over a list:

    for a in x:
      print a

so slicing isn't that common. 

Python also has something called generators which are sort of like
Haskell's lazy-evaluation lists.  They often make it possible to
program in a Haskell-like style.  Note however that they are mutable
objects, i.e. using g.next() to get the next element of a generator
actually updates the generator's internal state.  This can lead to a
bunch of subtle pitfalls if you're not careful, but overall they are a
very useful feature.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Aug  3 04:01:06 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 03 Aug 2007 10:01:06 +0200
Subject: __call__ considered harmful or indispensable?
In-Reply-To: <mailman.1554.1186108869.22759.python-list@python.org>
References: <mailman.1527.1186079415.22759.python-list@python.org>	<46b24200$0$19638$426a74cc@news.free.fr>
	<mailman.1554.1186108869.22759.python-list@python.org>
Message-ID: <46b2e0c2$0$14572$426a74cc@news.free.fr>

Skip Montanaro a ?crit :
>>> In this case there was a bug.  Depending on inputs, sometimes obj
>>> initialized to a class, sometimes an instance of that class.  (I fixed
>>> that too while I was at it.)  The problem was that the use of __call__
>>> obscured the underlying bug by making the instance as well as the class
>>> callable.
> 
>> I don't quite get the point here. A concrete example would be welcome.
> 
> The bug went something like this:
> 
>     obj = some.default_class
>     ...
>     if some_other_rare_condition_met:
>         ... several lines ...
>         obj = some.other_class()
>     ...
> 
> Later,
> 
>     x = obj()
>     x(...)

Ok, I see. A nasty one, indeed.



From rex at no_spam.dicad.de  Wed Aug 22 11:23:51 2007
From: rex at no_spam.dicad.de (Rex Turnbull)
Date: Wed, 22 Aug 2007 17:23:51 +0200
Subject: Handwriting Recognition
In-Reply-To: <1187637967.915548.53240@k79g2000hse.googlegroups.com>
References: <mailman.6.1187616526.26576.python-list@python.org>
	<1187635063.531103.7610@d55g2000hsg.googlegroups.com>
	<mailman.6.1187635870.32294.python-list@python.org>
	<1187637967.915548.53240@k79g2000hse.googlegroups.com>
Message-ID: <fahke7$pbu$1@news.pironet-ndh.com>

dogatemycomputer at gmail.com schrieb/wrote:
>>> import handwriting
>>> ...
>>> http://docs.python.org/lib/module-handwriting.html
>>> ha ha, I kid, I kid.
>>> I don't think this is an easy problem to solve.  You'd probably want
>>> Python to be a wrapper around whatever hand-writing recognition
>>> software you find or buy.  I know handwriting recognition software can
>>> read the hand-writing on checks, so that may be a starting point.
> 
> I once had someone explain to me how this actually works from a purely
> mathematical standpoint and the topic was fascinating.  Unfortunately
> most of the math went straight over my head and, in the end, it was
> explained to me that math itself is the problem.  Handwriting (and
> almost any other uncontrolled input) is usually emotional, not logical
> in the strictest sense (which is why handwriting experts can tell a
> great deal about a person from the handwriting).  If you can mimic
> handwriting (or any emotional) input in a mathematical expression then
> you wouldn't be far from playing "god".
> 
> This was the only thing I could find that may be helpful to you:
> 
> http://sourceforge.net/projects/tomoe/
> 
> This includes a "stroke editor" and an engine which may suit your
> needs.  Hope this helps..
> 
> Good luck!
> 

We use a neural net. Can't say much as I didn't write it. It takes a lot 
of training though (by training I mean training the software with each 
symbol).
Cheers, Rex


From __peter__ at web.de  Thu Aug 16 03:57:02 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 16 Aug 2007 09:57:02 +0200
Subject: Problem using Optional pyparsing
References: <mailman.2045.1187248183.22759.python-list@python.org>
Message-ID: <fa100e$nv7$03$1@news.t-online.com>

Nathan Harmston wrote:

> I know this isnt the pyparsing list, but it doesnt seem like there is
> one. I m trying to use pyparsing to parse a file however I cant get
> the Optional keyword to work. My file generally looks like this:
> 
> ALIGNMENT ?1020 ?YS2-10a02.q1k chr09 ? ? 1295 ? ? ? 42 ? ?141045
> 142297 ? C ? ?1254 95.06 1295 reject_bad_break 0
> 
> or this:
> 
> ALIGNMENT ?36 ? ?YS2-10a08.q1k chrm ? ? ?208 ? ? ?165 ? ? 10745
> 10788 ? C ? ? ?44 95.45 593 reject_low 10,14
> 
> and my grammar work well for these lines, however somethings the row looks
like:
> ALIGNMENT ?53 ? ?YS2-10b03.p1k chr12 ? ? ?180 ? ? ?125 ? 1067465
> 1067520 ? C ? ? ?56 98.21 532|5,2 reject_low 25
> 
> So I try to parse the 532 using
> 
> from pyparsing import *
> 
> integer = Word( nums )
> float = Word( nums+".")
> identifier = Word( alphanums+"-_." )
> 
> alignment = Literal("ALIGNMENT ").suppress()
> row_1 = integer.setResultsName("row_1")#.setParseAction(make_int)
> src_id = identifier.setResultsName("src_id")
> dest_id = identifier.setResultsName("dest_id")
> src_start = integer.setResultsName("src_start")#.setParseAction(make_int)
> src_stop = integer.setResultsName("src_stop")#.setParseAction(make_int)
> dest_start =
integer.setResultsName("dest_start")#.setParseAction(make_int)
> dest_stop = integer.setResultsName("dest_stop")#.setParseAction(make_int)
> row_8 = oneOf("F C").setResultsName("row_8")
> length = integer.setResultsName("length")#.setParseAction(make_int)
> percent_id =
float.setResultsName("percent_id")#.setParseAction(make_float)
> row_11 = integer + Optional(Literal("|") + commaSeparatedList )
> )#.setResultsName("row_11")#.setParseAction(make_int)
> result = Word(alphas+"_").setResultsName("result")
> row_13 = commaSeparatedList.setResultsName("row_13")
> 
> def make_alilines_status_parser():
> ? ? return alignment + row_1 + src_id + dest_id + src_start + src_stop
> + dest_start + dest_stop + row_8 + length + percent_id + row_11 +
> result + row_13
> 
> def parse_alilines_status(ifile):
> ? ? alilines = make_alilines_status_parser()
> ? ? for l in ifile:
> ? ? ? ? yield alilines.parseString( l )
> 
> However my parser always fails on lines of type 3. Does anyone know
> why the Optional part is not working.

The commaSeparatedList includes the rest of the line into its last item:

>>> commaSeparatedList.parseString("a,b    c")
(['a', 'b    c'], {})

You can fix this by defining your own delimitedList that doesnt accept
whitespace, e. g.:

>>> delimitedList(Word(alphanums)).parseString("a,b c")
(['a', 'b'], {})

Peter



From kyosohma at gmail.com  Tue Aug 28 10:27:14 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 28 Aug 2007 07:27:14 -0700
Subject: wxpython:how to minimize to taskbar
In-Reply-To: <1188310247.587456.103440@i13g2000prf.googlegroups.com>
References: <1188310247.587456.103440@i13g2000prf.googlegroups.com>
Message-ID: <1188311234.313691.151890@22g2000hsm.googlegroups.com>

On Aug 28, 9:10 am, Jimmy <mcknight0... at gmail.com> wrote:
> I'm kinda newbie to python and wxPython. Now I'm confronting a thorny
> problem: how can I make  my program minimize to the taskbar
> represented as an ico, and when there is some message from network
> coming, it will pop out?

Look at the wxPython demo source code. I found the code I needed in
the main.py file under the DemoTaskBarIcon class, which is a subclass
of wx.TaskBarIcon. You can't view it by running the demo. You have to
open the main.py file itself. On my Windows box, it's found here:
C:\Program Files\wxPython2.8 Docs and Demos\demo

You'll have to call a handler when you receive a message from the
network that basically calls your program's "show" command.

Mike



From larry.bates at websafe.com  Tue Aug 28 19:59:55 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 28 Aug 2007 18:59:55 -0500
Subject: Pythonic way of reading a textfile line by line without throwing
	an exception
In-Reply-To: <mailman.90.1188344955.28954.python-list@python.org>
References: <1ab7b8470708281647g59e685ect371f20aaea30b070@mail.gmail.com>
	<mailman.90.1188344955.28954.python-list@python.org>
Message-ID: <XNmdnVFJkZRMK0nbnZ2dnUVZ_s7inZ2d@comcast.com>

Deivys Ramirez wrote:
> Hi everyone,
> 
> I'm a Python newbie but have experience programming PHP and C so i'm
> not really new to programming but new to Python.
> 
> What's the "pythonic" way of reading a text file, line by line,
> without throwing an exception when there's nothing to be read?
> 
> I've been trying to map my while(!eof(fp)) mindset to the file object
> Python gives me when I call open() but have had no good results.
> 
> Regards,
> 
> Deivys Ramirez
> Lima-Peru

File objects are iterable so you you can just loop on them.

fp=open(filename, 'r')
for line in fp:
    # do something with line

fp.close()

-Larry Bates



From steveo at syslang.net  Wed Aug 15 10:36:02 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Wed, 15 Aug 2007 10:36:02 -0400 (EDT)
Subject: Retry: Question about FutureWarning
In-Reply-To: <1187183459.675090.194800@w3g2000hsg.googlegroups.com>
References: <mailman.1994.1187142273.22759.python-list@python.org>
	<ubKdnTirKeU6xl_bnZ2dnUVZ_rzinZ2d@speakeasy.net>
	<1187183459.675090.194800@w3g2000hsg.googlegroups.com>
Message-ID: <alpine.LFD.0.999.0708151032110.20572@saturn.syslang.net>

Thanks guys, but that's not my question. The question is this: Why does 
the call to filterwarnings not work if it's placed inside the M1 module? 
Why do I have to place the call in M4 to make it work? This is more a 
question about how import works than it is about what the value of -1 is. 
;-)

On Tuesday, Aug 14th 2007 at 18:49 -0700, quoth Erik Max Francis:

=>Steven W. Orr wrote:
=>
=>> M1.py:268: FutureWarning: hex/oct constants > sys.maxint will
=>> return positive values in Python 2.4 and up
=>>    StartTime   = safe_dict_get ( dic, 'starttime', 0xFFFFFFFF )
=>	...
=>> import warnings
=>> warnings.filterwarnings('ignore', category=FutureWarning)
=>> 
=>> My question is this: Why can the warning not be shut off by putting the
=>> two lines in M1 where the reference exists to 0xFFFFFFFF ?
=>
=>You really don't want to shut off the warning; it means just what it says:
=>
=>Python 2.3.5 (#1, Feb  8 2005, 23:36:23)
=>[GCC 3.2.3] on linux2
=>Type "help", "copyright", "credits" or "license" for more information.
=> >>> 0xffffffff
=><stdin>:1: FutureWarning: hex/oct constants > sys.maxint will return 
=>positive values in Python 2.4 and up
=>-1
=>
=>Python 2.4.3 (#1, Mar 29 2006, 17:16:11)
=>[GCC 3.2.3] on linux2
=>Type "help", "copyright", "credits" or "license" for more information.
=> >>> 0xffffffff
=>4294967295L
=>

On Wednesday, Aug 15th 2007 at 06:10 -0700, quoth Paul McGuire:

=>On Aug 14, 8:49 pm, Erik Max Francis <m... at alcyone.com> wrote:
=>
=>So if by '0xFFFFFFFF' you meant -1, then change this line to use -1.
=>Otherwise, if you really meant 4294967295L, leave it at 0xFFFFFFFF and
=>move on.
=>
=>-- Paul
=>
=>-- 
=>http://mail.python.org/mailman/listinfo/python-list
=>

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From Brad.Johnson at ballardtech.com  Tue Aug 21 16:36:15 2007
From: Brad.Johnson at ballardtech.com (Brad Johnson)
Date: Tue, 21 Aug 2007 20:36:15 +0000 (UTC)
Subject: IDE for Python
References: <46CAB7D4.5070308@gmail.com>
Message-ID: <loom.20070821T223523-903@post.gmane.org>

Joel Andres Granados <joel.granados <at> gmail.com> writes:

> 
> Hello list:
> 
> I have tried various times to use an IDE for python put have always been 
> disapointed.

Not sure which platform you're on, but I've really liked PyScripter for the
Windows platform.



From rbysamppi at gmail.com  Sun Aug  5 21:28:52 2007
From: rbysamppi at gmail.com (rbysamppi at gmail.com)
Date: Mon, 06 Aug 2007 01:28:52 -0000
Subject: Relative-importing *
In-Reply-To: <87vebv9yrr.fsf@benfinney.id.au>
References: <1185559874.299008.167010@x40g2000prg.googlegroups.com>
	<871weth2gg.fsf@benfinney.id.au>
	<pan.2007.07.28.06.17.39.399342@REMOVE.THIS.cybersource.com.au>
	<46ae3894$0$19609$426a34cc@news.free.fr>
	<1186200218.666444.254200@q3g2000prf.googlegroups.com>
	<87vebv9yrr.fsf@benfinney.id.au>
Message-ID: <1186363732.188847.48070@q3g2000prf.googlegroups.com>

On Aug 4, 7:10 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> rbygscrse... at gmail.com writes:
> > Yes, I'mimporting* for a reason, a good one, I think.
>
> Reading your description, I must say I don't see a good reason.
>
> > I have a set of modules (the number planned to reach about 400) that
> > would be dynamically loaded by my program as needed, and they're
> > somewhat similar to each other. I wish each of them to import * from
> > a certain "parent" module, so that they'll receive whatever
> > functions and variables I want all of them to share (using the
> > parent module's __all__), which may be overrided by the "child"
> > modules at their discretion. Sort of like class inheritance, but I'm
> > not doing that because implementing that would be a lot more tedious
> > and less elegant.
>
> It seems to me, based only on this description, that class inheritance
> would be far *more* elegant, and much easier to follow when reading
> the code.
>
> If all these functions and other objects are so closely-related that
> they form the core of some inheritance-like system, what's so
> inelegant about wrapping them in a class so that the inheritance is
> explicit in the module where it happens?
>
> --
>  \          "The only tyrant I accept in this world is the still voice |
>   `\                                       within."  -- Mahatma Gandhi |
> _o__)                                                                  |
> Ben Finney

Remember that I'm a relative beginner at Python, and actually
programming in general, so forgive me if what seems obvious is opaque
to me. This project's my way of learning the language. :)

I tried a class-based system. The reasons why I would prefer using
modules only rather than classes in modules was because I think that
it's a little redundant, and this redundancy made it more difficult to
grapple with the module/classes' names.

This system is for implementing "moves" in a game, of which there will
eventually be about 500 when all are implemented. I decided to try to
implement each move in a separate module, so we could add and maintain
moves to the system at convenience instead of editing a single huge
module with hundreds of classes. (Each move is completely separate and
unrelated to each other, other than the fact that they share a few
variables. In addition, I plan to make it possible to have a user add
new move modules at their discretion as extensions to the game.)

However, this ended up with a system where every single module had a
single class representing the move in it. The name of the class and
module have to be the same so that dynamic importing is possible, but
the repetition of the name is undesirable, as it increases the chance
of errors that might be hard to diagnose. (Because I'm planning to
have it possible for a hypothetical user to create his/her own
modules, I care a lot about making it as simple as possible.)

(In addition, it probably would make the program somewhat slower to
have an internal class inside every module, and performance is
important to me, as I'm planning to use this project in a future
game.
These modules are not going to have full-fledged object construction
and so forth. I don't want to construct and use objects at all--it
seems like a waste of time and memory to me to inherit __new__,
__del__, and so on. All that I want these modules to do is to
encapsulate varying information and behavior for /other/ objects to
use.)

It's not a matter of life-and-death for me if I have to use class
inheritance. But I think it would suboptimal.

But regardless of if it's the "right thing to do", do you all think
it's an unintended bug?

Thanks again! :)



From basilisk96 at gmail.com  Fri Aug 24 23:37:18 2007
From: basilisk96 at gmail.com (Basilisk96)
Date: Sat, 25 Aug 2007 03:37:18 -0000
Subject: GUI and distrubution
In-Reply-To: <1187974418.175783.50860@i38g2000prf.googlegroups.com>
References: <1187974418.175783.50860@i38g2000prf.googlegroups.com>
Message-ID: <1188013038.882337.97130@q3g2000prf.googlegroups.com>

On Aug 24, 12:53 pm, anders <anders.u.pers... at gmail.com> wrote:
> I have looked att Python onwww.showmedo.com
> And after this i start testing writing som program i Python.
> But...
>
> So how is the preferably way to distribute software written i Python
> i am NOT into hiding stuff, more a easy way of giving eg friends
> a copy of the program without having them installtion a lott
> och other stuff.
>
> My next question is witch is the best GUI to use, also consider
> the delivery question above.
>
> // Anders

Indeed a popular set of questions; but what is your platform? Without
that information, I'll just give you my biased opinion: wxPython GUI
toolkit, py2exe for distribution, and WiX or Inno Setup for the
installer. Now, you guess what my platform is ;-)

Once you get comfortable writing a few py2exe setup scripts, try
Andrea Gavana's GUI2Exe - it makes the distribution process a bit less
painful.

Of course, you're welcome to search for other stuff as suggested by
the other responses.

Cheers,
Basilisk96



From Werner.Merkl at fujitsu-siemens.com  Thu Aug 30 02:38:27 2007
From: Werner.Merkl at fujitsu-siemens.com (Werner)
Date: Wed, 29 Aug 2007 23:38:27 -0700
Subject: self extracting zipefile (windows) and (standard module) zipefile
In-Reply-To: <1188393780.454058.196360@22g2000hsm.googlegroups.com>
References: <1188388421.010643.19050@50g2000hsm.googlegroups.com>
	<1188393780.454058.196360@22g2000hsm.googlegroups.com>
Message-ID: <1188455907.151360.34740@50g2000hsm.googlegroups.com>

On 29 Aug., 15:23, kyoso... at gmail.com wrote:
> On Aug 29, 6:53 am, Werner <Werner.Me... at fujitsu-siemens.com> wrote:
>
>
>
>
>
> > Hi,
>
> > I try to read (and extract) some "self extracting" zipefiles on a
> > Windows system. The standard module zipefile seems not to be able to
> > handle this.
>
> > >>> fName = r"C:\tmp\mySelfExtratingFile.exe"
> > >>> import zipfile
> > >>> zipefile.is_zipfile(fName))
>
> > False
>
> > Is there a wrapper or has some one experience with other libaries to
> > extract those files?
>
> > Thanks in advance
> > Werner
>
> Since it's an executable, why not just use the subprocess module?
>
> I did find this set of scripts, but I don't know if they will help:http://www.example-code.com/python/zip.asp
>
> I did find how to extract via the command line, which you could use in
> conjunction with the subprocess module:http://help.globalscape.com/help/cutezip2/Creating_and_extracting_arc...
>
> Mike- Zitierten Text ausblenden -
>
> - Zitierten Text anzeigen -

thank you for answer. I found, that WinZip aund 7-ZIP may handle my
files (I'm not shure, if it's really zip...) So, I thing I try the 7-
zip command line tool (but I'd prefered a Python buildin version)

Werner



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Aug 29 03:45:03 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 29 Aug 2007 09:45:03 +0200
Subject: Check for dict key existence, and modify it in one step.
In-Reply-To: <1188324850.000752.60230@19g2000hsx.googlegroups.com>
References: <1188311810.226363.295500@w3g2000hsg.googlegroups.com>
	<46d43860$0$428$426a74cc@news.free.fr>
	<1188324850.000752.60230@19g2000hsx.googlegroups.com>
Message-ID: <46d523fb$0$30465$426a74cc@news.free.fr>

rodrigo a ?crit :
> You're right of course, I was unclear. I wasn't using 'dict' to
> override the dict clas, but just as a standin for the example (the
> actual dictionary names are varied).

I guessed so, but Python's behaviour wrt/ naming can be somewhat 
surprising for newcomers, and accidentally shadowing builtins (or not 
builtins FWIW) names is a common pitfall. So better to warn newcomers 
lurking here !-)


From dijkstra.arjen at gmail.com  Fri Aug 10 06:31:05 2007
From: dijkstra.arjen at gmail.com (dijkstra.arjen at gmail.com)
Date: Fri, 10 Aug 2007 10:31:05 -0000
Subject: Question about properties.
In-Reply-To: <1186741289.074717.174370@e16g2000pri.googlegroups.com>
References: <1186741289.074717.174370@e16g2000pri.googlegroups.com>
Message-ID: <1186741865.755891.207090@i13g2000prf.googlegroups.com>

On Aug 10, 12:21 pm, king kikapu <aboudou... at panafonet.gr> wrote:
> Hi,
>
> i read in a book the following code snippet that is dealing with
> properties:
>
> class ProtectAndHideX(object):
>     def __init__(self, x):
>         assert isinstance(x, int), '"x" must be an integer!"'
>         self.__x = ~x
>
>     def get_x(self):
>         return ~self.__x
>
>     x = property(get_x)
>
> Can anyone please help me understand what the symbol "~" does here ??
>
> Thanks for any help!

>>> help(2)
....
 |  __invert__(...)
 |      x.__invert__() <==> ~x



hth.
Duikboot




From horpner at yahoo.com  Thu Aug  2 15:06:49 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 02 Aug 2007 19:06:49 GMT
Subject: __call__ considered harmful or indispensable?
References: <mailman.1527.1186079415.22759.python-list@python.org>
	<slrnfb4asc.24c.horpner@FIAD06.norwich.edu>
Message-ID: <slrnfb4b0e.23o.horpner@FIAD06.norwich.edu>

On 2007-08-02, Neil Cerutti <horpner at yahoo.com> wrote:
> On 2007-08-02, skip at pobox.com <skip at pobox.com> wrote:
>> I don't personally use __call__ methods in my classes, but I
>> have encountered it every now and then here at work in code
>> written by other people.  The other day I replaced __call__
>> with a more obvious method name, so now instead of executing
>>
>>     obj(foo, bar, baz)
>>
>> the code in question is
>>
>>     obj.execute(foo, bar, baz)
>>
>> In this case there was a bug.  Depending on inputs, sometimes
>> obj initialized to a class, sometimes an instance of that
>> class.  (I fixed that too while I was at it.)  The problem was
>> that the use of __call__ obscured the underlying bug by making
>> the instance as well as the class callable.
>>
>> In this particular case it was clearly unnecessary and just
>> obfuscated the code.  I'm wondering, are there some general
>> cases where __call__ methods of a user-defined class are simply
>> indispensable?
>
> In C++ they are called functors, and they are very useful as
> surrogate functions with state. I haven't seen them used in the
> same way in Python much, because Python has more immediate
> solutions to (most of) these problems.
>
> Here's a (somewhat goofy) example:
>
> class is_consecutive(object):
>   def __init__(self, seed, compare=operator.lt):

That was supposed to be operator.le, not lt. I forgot to repaste after
fixing that bug.

>     self.last_value = seed
>     self.compare = compare
>   def __call__(self, total, value):
>     if total is False:
>       return False
>     lv = self.last_value
>     self.last_value = value
>     return self.compare(lv, value):
>
> a = range(15)
>
>>>> reduce(is_consecutive(0), a)
> True
>>>> reduce(is_consecutive(0), a + [1,2])
> False
>
> It's been a while since I had to be in the STL mindset, so I
> couldn't think of a better example.
>


-- 
Neil Cerutti
The pastor will preach his farewell message, after which the choir will sing,
"Break Forth Into Joy." --Church Bulletin Blooper


From apt.shansen at gmail.com  Tue Aug 21 00:31:07 2007
From: apt.shansen at gmail.com (Stephen Hansen)
Date: Mon, 20 Aug 2007 21:31:07 -0700
Subject: wxpython thread exception crash
In-Reply-To: <13ckp4nj0kt6583@corp.supernews.com>
References: <13ckp4nj0kt6583@corp.supernews.com>
Message-ID: <7a9c25c20708202131i4de63f3du136fa5b43e57b265@mail.gmail.com>

On 8/20/07, [david] <david at nospam.spam> wrote:
>
> What am I doing wrong?
> I'm trying to capture stdErr in a multi-threaded program.


You can't reliably access the GUI anywhere except in the main thread; you're
printing to stderr from the worker thread, and thus its writing to the GUI
control, and that action is occuring within the worker thread. Sometimes
it'll work. Eventually it'll always fail.

Try adjusting the write method of RedirectText to:

    def write(self,string):
        wx.CallAfter(self.out.WriteText, string)

"wx.CallAfter" is a convienence function to call from a worker thread "into"
the GUI thread and execute the specified method with the given options. It
makes modifying the GUI very easy.

--S
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From bj_666 at gmx.net  Tue Aug  7 05:19:09 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Aug 2007 09:19:09 GMT
Subject: How to use C enum in Python CTypes?
References: <1186462639.872254.25660@z24g2000prh.googlegroups.com>
	<5hqgogF3ldifeU1@mid.uni-berlin.de>
	<1186478018.409193.188130@e9g2000prf.googlegroups.com>
Message-ID: <5hqrodF3ldifeU5@mid.uni-berlin.de>

On Tue, 07 Aug 2007 02:13:38 -0700, rozniy wrote:

> On Aug 7, 2:11 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Tue, 07 Aug 2007 04:57:19 +0000, rozniy wrote:
>> > This site
>> >http://python.net/crew/theller/ctypes/tutorial.html#bugs-todo-and-non...
>>
>> > says that enumeration types is not implemented,
>> > "Enumeration types are not implemented. You can do it easily yourself,
>> > using c_int as the base class."
>>
>> I would just define constants:
>>
>> (OLSS_AD,
>>  OLSS_DA,
>>  OLSS_DIN,
>>  OLSS_DOUT,
>>  OLSS_SRL,
>>  OLSS_CT) = map(ctypes.c_int, xrange(6))
> 
> Wouldn't that assign integer values 0 to 5 to the things?

Yes.

> I don't know if it'll give me the correct results.

It should.  Enumerations in C are more or less just integer constants.

Ciao,
	Marc 'BlackJack' Rintsch


From kyosohma at gmail.com  Fri Aug 31 11:25:03 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 31 Aug 2007 08:25:03 -0700
Subject: Question involving a Python app...
In-Reply-To: <1188571968.529938.55770@i38g2000prf.googlegroups.com>
References: <1188571968.529938.55770@i38g2000prf.googlegroups.com>
Message-ID: <1188573903.389912.93530@r29g2000hsg.googlegroups.com>

On Aug 31, 9:52 am, sberry <s... at buildingonline.com> wrote:
> I am a Flash developer (also a Python dev) and I use an editor called
> SEPY Actionscript Editor.  The latest release version does not support
> Flash CS3, so I downloaded the source from subversion, edited it, and
> recompiled to get a version that worked with CS3.  Right now, in order
> to run the program I have to do a command line "python main.pyw."
>
> The question now is this:
> Others in my company would like to use the version I have compiled
> without installing Python, wxPython, 4suite, antlr, and a whole bunch
> of other Python libs.  So, how do I create an executable (on Windows)
> to install the program so it will run without the aforementioned
> framework being installed?
>
> I know this isn't really an entirely "Pythonic" question, but this
> group has always been very helpful in the past.
>
> Thanks

I find GUI2exe to be very easy to use. It's just py2exe with a GUI
frontend. See http://xoomer.alice.it/infinity77/main/GUI2Exe.html for
more information.

Mike



From hancock.robert at gmail.com  Mon Aug 13 19:03:45 2007
From: hancock.robert at gmail.com (milan_sanremo)
Date: Mon, 13 Aug 2007 23:03:45 -0000
Subject: chmod g+ Equivalent
In-Reply-To: <1i2t81z.1f4cmrhu1sy8iN%raims@dot.com>
References: <1187042290.821786.178420@19g2000hsx.googlegroups.com>
	<1i2t81z.1f4cmrhu1sy8iN%raims@dot.com>
Message-ID: <1187046225.596726.97390@g4g2000hsf.googlegroups.com>

On Aug 13, 6:33 pm, ra... at dot.com (Lawrence Oluyede) wrote:
> milan_sanremo <hancock.rob... at gmail.com> wrote:
> > I've read the documentation on os.chmod() and can implement all the
> > standard commands, but what is the syntax for the equivalent of chmod g
> > + to set the group id?
>
> chmod() [1] takes as the second parameter a bitwise or-ed combination of
> a series of values. If you look at chmod's man page ("man 2 chmod" on
> the shell) you can see the following values for the group id (I have OSX
> so the actual value may be different on your OS):
>
>            #define S_IRWXG 0000070    /* RWX mask for group */
>            #define S_IRGRP 0000040    /* R for group */
>            #define S_IWGRP 0000020    /* W for group */
>            #define S_IXGRP 0000010    /* X for group */
>
> So you just have to OR them to accomplish your goal.
>
I understand that for setting the standard rwx permissions, but how do
these affect the ability to change the setgid bit?  Under Solaris you
cannot do it from the command line in absolute mode, so perhaps it is
not possible in python

I'm trying to get the equivalent of 'chmod g+' not something like
'chmod 755'.



From pyth0nc0d3r at gmail.com  Sun Aug 26 15:29:47 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Sun, 26 Aug 2007 14:29:47 -0500
Subject: the del function
Message-ID: <eb79828c0708261229t2a91c252jbb209b4db040843c@mail.gmail.com>

import random
constant_array = ""
red = blue = grey = black = 0
r1 = r2 = r3 = r4 = 1
blu1 = blu2 = blu3 = blu4 = 2
g1 = g2 = g3 = g4 = 3
bla1 = bla2 = bla3 = bla4 = 4
single_players =
[r1,r2,r3,r4,blu1,blu2,blu3,blu4,bla1,bla2,bla3,bla4,g1,g2,g3,g4]
_red = [1,1,1,1]
#print random.randint(0,10
#red team
x = 0
while x < 4:
    array = single_players[4:17]
    length = len(array) - 1
    ray = random.randint(0,length)
    _red[x] = array[ray]
    del array[ray]
    print array
    x = x + 1
print _red

Ok I'm working on a game function where at the end of the game it remix's
the teams.

For some odd reason the del array[ray] isn't actually deleting the array
item in the list I get the following output:

C:\Documents and Settings\program\Desktop\python\pygame>remix.py
[2, 2, 2, 4, 4, 4, 4, 3, 3, 3, 3]
[2, 2, 2, 4, 4, 4, 4, 3, 3, 3, 3]
[2, 2, 2, 2, 4, 4, 4, 3, 3, 3, 3]
[2, 2, 2, 2, 4, 4, 4, 3, 3, 3, 3]
[2, 2, 4, 4]

The _red function is fine, but the del function isn't working.  What did I
do wrong?
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From jdvolz at gmail.com  Wed Aug 22 14:02:59 2007
From: jdvolz at gmail.com (Josh Volz)
Date: Wed, 22 Aug 2007 11:02:59 -0700
Subject: Error with long running web spider
In-Reply-To: <1187805496.980676.271830@l22g2000prc.googlegroups.com>
References: <1187805496.980676.271830@l22g2000prc.googlegroups.com>
Message-ID: <1187805779.572023.297350@l22g2000prc.googlegroups.com>

On Aug 22, 10:58 am, Josh Volz <jdv... at gmail.com> wrote:

I'm running this program on Windows XP, using Python 2.5.  I'm using
Active State Komodo IDE 4.0 as the run environment.

Thanks,
J.


> Hi everyone:
>
> I have a spider that is relatively long running (somewhere between
> 12-24 hours).  My problem is that I keep having an issue where the
> program appears to freeze.  Once this freezing happens the activity of
> the program drops to zero.  No exception is thrown or caught.  The
> program simply stops doing anything.  It even stops printing out its
> activity to stdout.  The program itself appears to run in about 14
> megs of memory.  Basically, the program looks up pages on a particular
> website, and then reads the HTML of those pages, parses it (lots of
> long regular expressions are used), and saves the found information to
> an object (which is later translated to SQL and the SQL is written to
> a file).
>
> I've actually had this same problem with several long running Python
> programs.  Any ideas?
>
> Thanks in advance.




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Aug 19 17:34:36 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 19 Aug 2007 23:34:36 +0200
Subject: Development for dual core machine
References: <1187515287.226791.186700@j4g2000prf.googlegroups.com>
	<7x3ayfsagr.fsf@ruckus.brouhaha.com>
Message-ID: <5irrbdF3r2m8aU3@mid.individual.net>

Paul Rubin wrote:

> Python threading doesn't support multiple CPU's because of the
> GIL.

:s/support/take full advantage of/

Regards,


Bj?rn

-- 
BOFH excuse #46:

waste water tank overflowed onto computer



From http  Mon Aug  6 11:06:06 2007
From: http (Paul Rubin)
Date: 06 Aug 2007 08:06:06 -0700
Subject: Tkinter or wxpython?
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<1186411846.690086.120280@z24g2000prh.googlegroups.com>
Message-ID: <7xps20push.fsf@ruckus.brouhaha.com>

kyosohma at gmail.com writes:
> I agree that making web apps is probably the way of the future.
> However, there are lots of security risks involved with it that need
> to be understood. One of the problems that raging is about AJAX, see
> here: http://arstechnica.com/news.ars/post/20070802-security-experts-warn-developers-about-the-risks-of-premature-ajax-ulation.html

Yes, do be careful of ajax, and of internet programming in general.
However, the usual use of a desktop app is deployment within one
company, so if you write it as a web app you can ease the security
issue by firewalling the server so that it can't be accessed through
the outside internet.  That still makes deployment a lot easier, since
there are zero desktop installations required, and you can upgrade the
software whenever you want at the server side.


From vodela.sai at gmail.com  Thu Aug  2 13:33:25 2007
From: vodela.sai at gmail.com (Rohan)
Date: Thu, 02 Aug 2007 17:33:25 -0000
Subject: Email
Message-ID: <1186076005.729346.327140@z24g2000prh.googlegroups.com>

I was wondering if there could be an arrangement where a file could be
attached and send as an email.
For ex
f = open(add.txt,w)
f.write('python')
f.close()

Now I would like to send an email with add.txt as an attachment, is it
possible ?
some one give me a pointer towards this.



From zzbbaadd at aol.com  Thu Aug 30 02:44:33 2007
From: zzbbaadd at aol.com (zzbbaadd at aol.com)
Date: Wed, 29 Aug 2007 23:44:33 -0700
Subject: list index()
Message-ID: <1188456273.102334.48660@50g2000hsm.googlegroups.com>

What's with the index() function of lists throwing an exception on not
found? Let's hope this is rectified in Python 3. If nothing else, add
a function that doesn't throw an exception. There are a million
situations where you can have an item not be in a list and it is not
an exception situation.



From arkanes at gmail.com  Fri Aug 31 19:56:03 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 31 Aug 2007 18:56:03 -0500
Subject: Python Unicode to String conversion
In-Reply-To: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
References: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
Message-ID: <4866bea60708311656p26aa0644w4ad71ab019ff5eb5@mail.gmail.com>

On 8/31/07, thijs.braem at gmail.com <thijs.braem at gmail.com> wrote:
> Hi everyone,
>
> I'm having quite some troubles trying to convert Unicode to String
> (for use in psycopg, which apparently doesn't know how to cope with
> unicode strings).
>
> The error I keep having is something like this:
> ERREUR:  S?quence d'octets invalide pour le codage ?UTF8? : 0xe02063
>
> (sorry, locale is french, it means "byte sequence invalid for encoding
> <<utf8>>", the value is probably an e with one of the french accents)
>
> I've found lots of stuff about this googling the error, but I don't
> seem to be able to find a "works always"-function just to convert a
> unicode variable back to string...


encode().

 You didn't post the code that was failing, I can encode that value
into UTF-8 (and unless I'm very much mistaken, you should be able to
encode any unicode string to UTF-8).


From sbellon at sbellon.de  Tue Aug  7 18:28:52 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Wed, 8 Aug 2007 00:28:52 +0200
Subject: Destruction of generator objects
Message-ID: <20070808002852.6228ae91@cube.tz.axivion.com>

Hi all,

I'm generating a binding from Python to C using SWIG. On the C side I
have iterators over some data structures. On the Python side I
currently use code like the following:

    def get_data(obj):
        result = []
        iter = make_iter(obj)
        while more(iter):
            item = next(iter)
            result.append(item)
        destroy(iter)
        return result

Now I'd like to transform it to a generator function like the following
in order to make it more memory and time efficient:

    def get_data(obj):
        iter = make_iter(obj)
        while more(iter):
            yield next(iter)
        destroy(iter)

But in the generator case, I have a problem if the generator object is
not iterated till the StopIteration occurs, but if iteration is stopped
earlier. In that case, the C iterator's destroy is not called, thus the
resource is not freed.

Is there a way around this? Can I add some sort of __del__() to the
generator object so that in case of an early destruction of the
generator object, the external resource is freed as well?

I'm looking forward to hearing your hints!

-- 
Stefan Bellon


From wpdster at gmail.com  Tue Aug  7 09:16:14 2007
From: wpdster at gmail.com (Patrick Doyle)
Date: Tue, 7 Aug 2007 09:16:14 -0400
Subject: Importing * From a Package
In-Reply-To: <20070806143253.4947.1097304571.divmod.quotient.19513@ohm>
References: <e2a1d0aa0708060706p1f50d5c1j93b6cc3679522597@mail.gmail.com>
	<20070806143253.4947.1097304571.divmod.quotient.19513@ohm>
Message-ID: <e2a1d0aa0708070616y8a6510w5a83f8413dc32abc@mail.gmail.com>

> There's no reliable way to differentiate between names which you defined
> using something other than an import statement, names you defined with an
> import statement with the intent of publishing them as part of your external
> API, and names you defined with an import statement which you only intended
> to use internally.  So Python doesn't even try to differentiate betweem them.
>
ok, that makes sense

> >"[It] imports whatever names are defined in the package [including]
> >any submodules of the package that were explicitly loaded by previous
> >import statements."
This is the part that has me confused -- why does "from package import
*" go on to import names that were explicitly loaded by previous
import statements?

Here is a contrived example (contrived by virtue of culling it out of
an existing code base I was reorganizing into packages when I stumbled
across this:

Directory structure:
./
./SDRGen
./SDRGen/__init__.py
./SDRGen/TFGenerator.py

The SDRGen/__init__.py file is empty.
The SDRGen/TFGenerator.py file contains the following 2 lines:

class TFGenerator:
    pass


Now, at the python prompt I type (and get) the following:

>>> from SDRGen.TFGenerator import *
>>> TFGenerator
<class SDRGen.TFGenerator.TFGenerator at 0xb7eae8bc>
>>> from SDRGen import *
>>> TFGenerator
<module 'SDRGen.TFGenerator' from 'SDRGen/TFGenerator.py'

It looks to me like, when I executed the "from SDRGen import *"
statement, the import "[included a] submodule of the package that
[was] explicitly loaded by [a] previous import statement."  Granted
this example is probably not the best example of style and grace in a
Python program, and I'm in the process of cleaning up things such as
"from ... import *" and naming files and classes with identical names,
but when I stumbled across this I found it confusing, to say the
least.

Why does Python include the submodules that were explicitly loaded by
previous imports?  Does it go out of it's way to do so?  If so, why?
What purpose does it serve?  Or, is it a natural fallout of the manner
in which imports are processed?  If so, could somebody guide my
intuition as to why this would be such a natural fallout?

Thanks for the enlightenment...

--wpd


From ldo at geek-central.gen.new_zealand  Fri Aug 31 21:50:46 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 13:50:46 +1200
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<1188496588.750629.208100@g4g2000hsf.googlegroups.com>
	<mailman.154.1188497511.28954.python-list@python.org>
	<1188498073.997168.282420@q5g2000prf.googlegroups.com>
	<mailman.156.1188498891.28954.python-list@python.org>
Message-ID: <fbagd1$gnm$4@lust.ihug.co.nz>

In message <mailman.156.1188498891.28954.python-list at python.org>, Carsten
Haese wrote:

> On Thu, 2007-08-30 at 11:21 -0700, zzbbaadd at aol.com wrote:
>
>> I wish they were not
>> getting rid of dict.has_key() in Python 3, which I prefer to IN.
> 
> That wish will only come true if you maintain your own fork of Python 3.
> has_key() will go away, period. It has been made obsolete by "in", which
> is faster and more concise.

And is also a backdoor way of introducing non-virtual methods into Python,
is it not.


From arkanes at gmail.com  Wed Aug  8 10:10:29 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 8 Aug 2007 09:10:29 -0500
Subject: twisted - locking threads when deferToThread is used
In-Reply-To: <4866bea60708080709v797c5a67w158f6f988ef5c304@mail.gmail.com>
References: <46B99CCB.1070304@iptel.org>
	<4866bea60708080709v797c5a67w158f6f988ef5c304@mail.gmail.com>
Message-ID: <4866bea60708080710ma83a713p622c2997df812a6a@mail.gmail.com>

On 8/8/07, Chris Mellon <arkanes at gmail.com> wrote:
> On 8/8/07, Ladislav Andel <ladaan at iptel.org> wrote:
> > Hi,
> > I'm writing an application which will be periodically testing servers.
> > I will have a global list of these servers(domain names) and need to do
> > few tasks.
> > 1) DNS checks - I will use asynchronous twisted-names for it
> > - in case there is a difference comparing to the list it should update
> > the list(then also in DB)
> > 2) ICMP pings - should be also possible to do it asynchronously
> > 3) Blocking function which will be pinging with SIP requests
> > - here I will use function deferToThread to make it non-blocking.
> >
> > Questions:
> > 1) How do I lock each thread when writing to a global list in twisted?
> > 2) How will I put together all three results mentioned above in the
> > global list
> > - is it by using function callLater ?
> > 3) Could you help me with a rough skeleton of this application, please?
> >
> > Thank you,
> > Lada
> >
>
>
> deferToThread returns the result of the passed function in a Deferred.
> Callbacks and errbacks will be run in the main event loop, so you
> don't need to worry about thread safety of the callbacks, just of the
> function itself.
>
> The basic model would look something like this:
>
> def querySIP(what):
>     return sip.query(what) #native, *threadsafe*, blocking call
>
> sipquery = reactor.deferToThread(querySIP, what)
> sipquery.addCallback(lambda result: sip_results.append(result))
> sipquery.addErrback(log.err)
>


And, of course, deferToThread is a function in the
twisted.internet.threads module, not a method of the reactor.


From claird at lairds.us  Fri Aug  3 09:35:14 2007
From: claird at lairds.us (Cameron Laird)
Date: Fri, 3 Aug 2007 13:35:14 +0000
Subject: XML Processing
References: <1186080339.344993.167670@z24g2000prh.googlegroups.com>
	<1186081434.012668.206770@z24g2000prh.googlegroups.com>
	<mailman.1532.1186081833.22759.python-list@python.org>
	<1186082619.193097.207650@x40g2000prg.googlegroups.com>
Message-ID: <ihnbo4-v3b.ln1@lairds.us>

In article <1186082619.193097.207650 at x40g2000prg.googlegroups.com>,
 <kyosohma at gmail.com> wrote:
>On Aug 2, 2:09 pm, Jay Loden <pyt... at jayloden.com> wrote:
>> kyoso... at gmail.com wrote:
>> > On Aug 2, 1:45 pm, Roman <rgelfa... at hotmail.com> wrote:
>> >> Is there a package that converts a string that contains special
>> >> characters in xml to to literal value.  For instance, converts
>stringhttp://myhome/&paramtohttp://myhome/&param.
>>
>> >> Thanks in advance
>>
>> > I've seen examples using the HTMLgen module. But here's another script
>> > I just found:
>>
>> >http://mail.python.org/pipermail/python-list/1999-November/016814.html
>>
>> > I would think that you could use regular expressions too.
>>
>> > Mike
>>
>> I would reccommend against using the example above or using regular
>expressions, since both are likely to miss corner cases, and the stdlib
>has an encode function that's already designed for this task
>>
>> http://docs.python.org/lib/module-xml.sax.saxutils.html
>>
>> The encode() function in xml.sax.saxutils also is extensible, should
>you run into any entities that it fails to escape in the current
>implementation.
>>
>> -Jay
>
>Yes, I am an idiot.
>

!  Unproved, as Scotsmen are wont to say.

This and similar questions arise frequently enough that I recommend
<URL: http://wiki.python.org/moin/EscapingXml > for those who want
to pursue the subject.


From laurent.pointal at limsi.fr  Thu Aug  2 03:18:05 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Thu, 02 Aug 2007 09:18:05 +0200
Subject: Python IMAP web-access
In-Reply-To: <46b0c675$0$90272$14726298@news.sunsite.dk>
References: <46b0c675$0$90272$14726298@news.sunsite.dk>
Message-ID: <f8s0fd$rn4$1@news2.u-psud.fr>

Damjan a ?crit :
> Is there some project that implements web access to an IMAP store?
> 
> Maybe something AJAXy like http://roundcube.net/??

I dont know if this fill your need, but in my Python bookmarks, for 
webmail I have a reference to NiMail (http://www.nimail.org/).

A+

Laurent.


From klove at tax.ok.gov  Wed Aug 29 16:33:02 2007
From: klove at tax.ok.gov (Kenneth Love)
Date: Wed, 29 Aug 2007 15:33:02 -0500
Subject: Accessing docstrings at runtime?
References: <011b01c7ea69$95512fe0$e6003dcc@worf2>
	<4866bea60708291128o29803077r5fe06249ab6cc29c@mail.gmail.com>
Message-ID: <012701c7ea7b$cc285220$e6003dcc@worf2>

On 08/29/07, Chris Mellon <arkanes at gmail.com> wrote:
> On 8/29/07, Kenneth Love <klove at tax.ok.gov> wrote:
>> How do I print the docstring for a class property?
>>
>> [[[ SNIP EXAMPLE ]]]
>>
>> What am I doing wrong?
>>
>
> You're looking at an instance, not at the class. y.x is going through
> the descriptor lookup and is returning the string, so the __doc__ is
> the the __doc__ of the string object, as you see.
>
> If you want to look at the property directly, look it up in the class 
> object:
>
> C.x.__doc__

That worked.  Thanks!

Kenneth 




From pyth0nc0d3r at gmail.com  Tue Aug 28 18:21:29 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Tue, 28 Aug 2007 17:21:29 -0500
Subject: Okay learning python is somewhat hard.
In-Reply-To: <46D49A7B.8010600@sdf.lonestar.org>
References: <eb79828c0708281404m19e5d4e9u1e806ad8d8625dcf@mail.gmail.com>
	<46D49A7B.8010600@sdf.lonestar.org>
Message-ID: <eb79828c0708281521p148f3faax4e794776fc0c0238@mail.gmail.com>

Yep I'll keep hacking at it aye :D.  Also I'll do some searching on the new
styled classes.

On 8/28/07, J. Cliff Dyer <jcd at sdf.lonestar.org> wrote:
>
> A couple thoughts:
>
> First, your class looks like it describes the line, not just the
> midpoint.  Your method calculates the midpoint of that line, so let the
> class be a line class.  That way you can add other useful methods to it:
>
> Line.midpoint()
> Line.length()
> Line.slope()
>
> etc.
>
> Second, you're losing fractions because all of your code deals with
> integers.  Integer division rounds down.  So instead of dividing by 2,
> divide by 2.0, to force the calculation into floating point.  Better yet
> (conceptually speaking), explicitly cast your input to floating point
> variables:  self.x1 = float(x1), etc.
>
> Third.  ALWAYS use new style classes.
>
> class Line(object):
>
> not
>
> class Line:
>
> Otherwise, it looks like you're on your way.  Keep hacking at it.
>
> Cheers,
> Cliff
>
>
>
> Lamonte Harris wrote:
> > Since I can't really focus on PROJECTS[since I don't know much python
> > I can't do any projects because all my projects are BIG], So I decided
> > to work on some problems I've gotten from school from started
> > geometry, So I attempted to make a script to get the midpoint of a
> > line segment using the formula giving:
> >
> > [1 and 2 are subscripts]
> >
> > X1 + X2
> > ----------- = mid pt. (x)
> >      2
> >
> > Y1 + Y2
> > ----------- = mid pt. (y)
> >      2
> >
> > So i tried coding the following script.
> >
> > #MIDPOINT OF A LINE
> > class midpoint:
> >     def __init__(self,x1,x2,y1,y2):
> >         self.x1 = x1
> >         self.x2 = x2
> >         self.y1 = y1
> >         self.y2 = y2
> >         self.dictionary = {'x' : '','y' : ''}
> >         self.calculate_mid_point()
> >     def calculate_mid_point(self):
> >         X = self.x1 + self.x2
> >         X = X/2
> >         self.dictionary['x'] = X
> >         Y = self.y1 + self.y2
> >         Y = Y/2
> >         self.dictionary['y'] = Y
> > c_x = -2
> > c_y = -2
> > d_x = 4
> > d_y = 3
> > midpoint_ = midpoint(c_x,d_x,c_y,d_y)
> > print midpoint_.dictionary
> >
> > It works and all, but I can't get the fraction or decimal from the
> > output :S
> >
> > Output:
> > {'y': 0, 'x': 1}
> >
> > On my paper the real output is:
> > x = 1
> > y = 1/2
> >
> >
>
>
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From aboudouvas at panafonet.gr  Fri Aug 10 11:04:07 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Fri, 10 Aug 2007 08:04:07 -0700
Subject: The Future of Python Threading
In-Reply-To: <87ir7n4fps.fsf@benfinney.id.au>
References: <1186740111.918048.77920@d30g2000prg.googlegroups.com>
	<87ir7n4fps.fsf@benfinney.id.au>
Message-ID: <1186758247.986802.81990@e9g2000prf.googlegroups.com>

> All of which is avoided by designing the program to operate as
> discrete processes communicating via well-defined IPC mechanisms.

Hi Ben,

i would like to learn more about this, have you got any links to give
me so i can have a look ?



From johnmasters at oxtedonline.net  Wed Aug  1 17:28:40 2007
From: johnmasters at oxtedonline.net (John K Masters)
Date: Wed, 1 Aug 2007 22:28:40 +0100
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <46AF8ED7.2070206@wingware.com>
References: <46AF8ED7.2070206@wingware.com>
Message-ID: <20070801212840.GA25065@spookie1.spookiegate>

On 15:34 Tue 31 Jul     , Wingware wrote:
> Hi,
> 
> I'm happy to announce the first beta release of Wing IDE 3.0.  It is
> available from http://wingware.com/wingide/beta
> 

If their support for paid customers is anything like their support for
prospective customers then I would leave well alone.

I have been trying wing for a few days but have noticed that
auto-completion does not work on all modules. I submitted this to wing
and was told that probably my PYTHONPATH was wrong.

I subsequently submitted a question about the licensing, i.e. whether I
could use wing on a home setup using Debian Etch, where I develop my
apps, and a work setup, using Debian Etch, with no net access. 

So far I have had no response

Regards, John


From carsten at uniqsys.com  Fri Aug 17 00:02:11 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 17 Aug 2007 00:02:11 -0400
Subject: How to say $a=$b->{"A"} ||={} in Python?
In-Reply-To: <1187320510.165621.224150@l22g2000prc.googlegroups.com>
References: <1187303750.590497.208060@x40g2000prg.googlegroups.com>
	<fa2m4s$k1g$1@daisy.noc.ucla.edu>
	<1187311999.880853.135780@j4g2000prf.googlegroups.com>
	<mailman.2091.1187317979.22759.python-list@python.org>
	<1187320510.165621.224150@l22g2000prc.googlegroups.com>
Message-ID: <20070817035900.M74081@uniqsys.com>

On Fri, 17 Aug 2007 03:15:10 -0000, beginner wrote
> On Aug 16, 9:32 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> > What is the best solution in Perl need not be the best solution in
> > Python. In Python you should just use a tuple as your dict key, i.e.
> > a[k1,k2] = v, unless you have some other constraints you're not telling
> > us.
> >
> > HTH,
> >
> > --
> > Carsten Haesehttp://informixdb.sourceforge.net
> 
> I use tuples this way all the time. It is indeed very neat.  But it 
> is not a replacement for double hash-table.  If I want to retrieve 
> information just by K1, it is not efficient to index on (K1, K2).

If you have to look up all values associates with k1 and any k2, you're right,
that's not efficient. That would fall under "other constraints you're not
telling us." I'm not a mind reader.

-Carsten



From orsenthil at gmail.com  Sat Aug  4 23:35:11 2007
From: orsenthil at gmail.com (Phoe6)
Date: Sun, 05 Aug 2007 03:35:11 -0000
Subject: Comparing RFC1123 based Dates
In-Reply-To: <1186281836.970400.103490@i13g2000prf.googlegroups.com>
References: <1186281836.970400.103490@i13g2000prf.googlegroups.com>
Message-ID: <1186284911.988459.324690@e16g2000pri.googlegroups.com>

Phoe6 wrote:
> I would like to parse RFC 1123 date format and compare two dates. I
> find that
> datetime module does not specifically confirms to any RFC. Any
> suggestions as how I can handle the RFC 1123 date format using
> standard libraries before I go to re based parsing?

Well,
>>> import time
>>> timeobj = time.strptime("Thu, 01 Dec 1994 16:00:00 GMT","%a, %d %b %Y %H:%M:%S %Z")

was easy.

Thanks,
Senthil



From steve at holdenweb.com  Tue Aug 28 19:16:31 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 28 Aug 2007 19:16:31 -0400
Subject: Gmane's been quiet ...
Message-ID: <fb2acc$tdn$1@sea.gmane.org>

... so I was wondering if it's just me who hasn't seen any postings today?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From aboudouvas at panafonet.gr  Sat Aug 11 07:53:11 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Sat, 11 Aug 2007 04:53:11 -0700
Subject: Ipc mechanisms and designs.
In-Reply-To: <NikitaTheSpider-17A4AE.15331210082007@news-server.nc.rr.com>
References: <1186760055.658942.116300@x40g2000prg.googlegroups.com>
	<NikitaTheSpider-17A4AE.15331210082007@news-server.nc.rr.com>
Message-ID: <1186833191.686023.50970@57g2000hsv.googlegroups.com>

On Aug 10, 10:33 pm, Nikita the Spider <NikitaTheSpi... at gmail.com>
wrote:
> In article <1186760055.658942.116... at x40g2000prg.googlegroups.com>,
>  king kikapu <aboudou... at panafonet.gr> wrote:
>
>
>
> Hi King Kikapu
> There's a shared memory module for Python, but it is *nix only, I'm
> afraid. I realize you said "mainly Windows" but this module seems to do
> what you want so maybe you can work out a creative solution.
>
> http://NikitaTheSpider.com/python/shm/


Yes, i am currently developing mainly on windows but a cross-platform
solution would surely interests me. I will check it out this!

@Alex: Thanks, it looks very-very interesting...




From jeff_barish at earthlink.net  Tue Aug 28 16:23:41 2007
From: jeff_barish at earthlink.net (Jeffrey Barish)
Date: Tue, 28 Aug 2007 14:23:41 -0600
Subject: Biased random?
References: <favd0c$fcu$1@ss408.t-com.hr>
Message-ID: <fb208d$8j6$1@sea.gmane.org>

Ivan Voras wrote:

> Hi,
> 
> I have a list of items, and need to choose several elements from it,
> "almost random". The catch is that the elements from the beginning
> should have more chance of being selected than those at the end (how
> much more? I don't care how the "envelope" of probability looks like at
> this point - can be linear). I see that there are several functions in
> Python standard libraries for various distribution, but is there an easy
> pythonic way to make them do what I need?

If you take the difference between two uniformly distributed random
variables, the probability density function forms an isosceles triangle
centered at 0.  Take the absolute value of that variable and the pdf is a
straight line with maximum value at 0 tapering to 0 at max.  Thus,

z = abs(randint(0, max) - randint(0, max))

ought to do the trick.
-- 
Jeffrey Barish



From antroy at gmail.com  Wed Aug 15 08:03:17 2007
From: antroy at gmail.com (Ant)
Date: Wed, 15 Aug 2007 05:03:17 -0700
Subject: buggie in else syntax ?
In-Reply-To: <mailman.2002.1187177760.22759.python-list@python.org>
References: <46C21D70.8000409@gmail.com>
	<200708150138.57816.thomas@jollans.com>
	<mailman.2002.1187177760.22759.python-list@python.org>
Message-ID: <1187179397.682278.214710@50g2000hsm.googlegroups.com>

On Aug 15, 9:40 am, stef mientki <tjoll... at googlemail.com> wrote:
> Thomas Jollans wrote:
...
>     else: JSM(230) ; \
>         if b>3:              <== SYNTAX ERROR pointing to the "f" of if

This is equivalent to:

>     else: JSM(230) ;       if b>3:

If statements (any compund statements in fact such as for loops etc)
*must* start on a new line (with indentation as necessary):

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

--
Ant...

http://antroy.blogspot.com/




From 55rebels at gmail.com  Thu Aug 16 09:33:21 2007
From: 55rebels at gmail.com (55rebels at gmail.com)
Date: Thu, 16 Aug 2007 06:33:21 -0700
Subject: Python Book Recommendations
In-Reply-To: <fa0ruu$65r$1@news2.u-psud.fr>
References: <d5506a9f0708141439v6a30d4c8l5092b30d269c1af4@mail.gmail.com>
	<Pine.LNX.4.44.0708141556370.5396-100000@violet.rahul.net>
	<1b31ae500708141638w77614014o6f382d0389bc69df@mail.gmail.com>
	<mailman.2015.1187189280.22759.python-list@python.org>
	<1187191803.845011.30400@x35g2000prf.googlegroups.com>
	<fa0ruu$65r$1@news2.u-psud.fr>
Message-ID: <1187271201.262706.132080@i38g2000prf.googlegroups.com>

On Aug 15, 11:47 pm, Laurent Pointal <laurent.poin... at limsi.fr> wrote:
> Azazello a ?crit :
>
>
>
> > On Aug 15, 7:47 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> >> If I could have only one book, I would buy "Core Python, Second
> >> Edition," by Wesley Chun.
>
> >> For the record, I own:
> >> Core Python, Second Edition (great)
> >> wxPython in Action (haven't used yet)
> >> Beginning Python (barely used)
> >> Python in a Nutshell (use as a reference, although interactive python
> >> dir() is more useful)
> >> Dive into Python (great book)
> >> Python Cookbook (great book)
> >> Python Pocket Reference (not very useful)
> >> Python Phrasebook (I love the Phrasebook series, but this isn't a
> >> necessary book)
>
> > I would like to add:
>
> > Foundations of Python Network Programming
>
> There was a review about this one on slashdot:http://books.slashdot.org/books/04/10/13/1815209.shtml?amp;tid=192&am...
>
>
>
> > I also use the Python Essential Reference.  (although all of the
> > information is probably online it's nice to have a solid paper
> > reference)

Byte of python - online book.
Best I've seen yet, online anyway. Especially great for newbies...
like me.
Wish I could buy a hard copy.



From conra2004 at yahoo.com  Mon Aug 13 06:07:46 2007
From: conra2004 at yahoo.com (yadin)
Date: Mon, 13 Aug 2007 03:07:46 -0700
Subject: negative polar axis
Message-ID: <1186999666.642856.16820@19g2000hsx.googlegroups.com>

hi!
how can i do polar plot in python with negative axes
that is the value of the magnitude is negative



From hadronquark at googlemail.com  Mon Aug  6 06:32:56 2007
From: hadronquark at googlemail.com (Hadron)
Date: Mon, 06 Aug 2007 12:32:56 +0200
Subject: Emacs + python.
References: <00tzrdm1zd.fsf@googlemail.com>
Message-ID: <rhcndq7fr.fsf@googlemail.com>

Hadron <hadronquark at googlemail.com> writes:

> Sorry to repeat, but I had to reinstall and lost all my news.
>
> I am looking for pointers on using emacs with python. I use emacs v
> 22.0.91 (Ubuntu snapshot).
>
> It comes with its own python mode.
>
> The problem is that the debugger just hangs when I start it. The
> interpreter runs fine. Any ideas?
>
> What versions of python.el or python-mode.el or ..... are you using and
> why?
>
> Many thanks for any pointers.

I upgraded to emacs 23 from

http://peadrop.com/blog/2007/01/06/pretty-emacs/ and it works fine now.

Crosspost & Followup-To: gnu.emacs.help


From kib2 at free.fr  Sun Aug 26 15:20:09 2007
From: kib2 at free.fr (tool69)
Date: Sun, 26 Aug 2007 21:20:09 +0200
Subject: New UI Toolkit
In-Reply-To: <1188146822.129605.160560@22g2000hsm.googlegroups.com>
References: <1188146822.129605.160560@22g2000hsm.googlegroups.com>
Message-ID: <46d1d363$0$404$426a74cc@news.free.fr>

Gerdus van Zyl a ?crit :

Seems very promising.

But I'm afraid with the Swing-like interface, i.e : did you use the same 
  widget positionning ?


From deets at nospam.web.de  Wed Aug  1 04:50:49 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 01 Aug 2007 10:50:49 +0200
Subject: standalone process to interact with the web
References: <1185899130.331170.151980@e16g2000pri.googlegroups.com>
Message-ID: <5havr9F3inuj7U1@mid.uni-berlin.de>

beginner wrote:

> Hi Everyone,
> 
> I am looking for a way to allow a standalone python process to easily
> interactive with a few web pages. It has to be able to easily receive
> requests from the web and post data to the web.
> 
> I am thinking about implementing a standalone soap server, but I am
> not sure which library is good.
> 
> Any suggestions?

Forget SOAP. Use XMLRPC. SOAP is bloated, not to interoperable and the last
time I checked (has been a while though) the python-implementations were
troublesome.

http://wanderingbarque.com/nonintersecting/2006/11/15/the-s-stands-for-simple

Diez


From arkanes at gmail.com  Fri Aug 31 12:12:22 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 31 Aug 2007 11:12:22 -0500
Subject: So what exactly is a complex number?
In-Reply-To: <1188576174.3479.9.camel@dot.uniqsys.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<1188576174.3479.9.camel@dot.uniqsys.com>
Message-ID: <4866bea60708310912q2c8ec987i37f679596e3926e7@mail.gmail.com>

On 8/31/07, Carsten Haese <carsten at uniqsys.com> wrote:
> On Thu, 2007-08-30 at 20:11 -0500, Lamonte Harris wrote:
> > Like in math where you put letters that represent numbers for place
> > holders to try to find the answer type complex numbers?
>
> Is English your native language? I'm having a hard time decoding your
> question.
>

I'm pretty sure he was describing middle school algebra.


From willshak at 00hvc.rr.com  Tue Aug 21 08:10:53 2007
From: willshak at 00hvc.rr.com (willshak)
Date: Tue, 21 Aug 2007 08:10:53 -0400
Subject: Latest models of Gibson guitars
In-Reply-To: <f5idnbNj5-BqkVfbnZ2dnUVZ_tfinZ2d@comcast.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<QsCdnfC5hI4ENFXbnZ2dnUVZ8v2vnZ2d@bt.com>
	<190820071924351381%rag@nospam.techline.com>
	<1187623025.845370.251530@x40g2000prg.googlegroups.com>
	<f5idnbNj5-BqkVfbnZ2dnUVZ_tfinZ2d@comcast.com>
Message-ID: <13cllic3qnulb28@news.supernews.com>

on 8/20/2007 5:51 PM Lew said the following:
> RickH wrote:
>> On Aug 19, 9:24 pm, Randall Ainsworth <r... at nospam.techline.com>
>> wrote:
>>> In article <QsCdnfC5hI4ENFXbnZ2dnUVZ8v2vn... at bt.com>, Hermit
>>>
>>> <her... at please.dont.bother.com> wrote:
>>>> How does the image quality compare with a DSLR?
>>> Depends on whether it's a Paul or a Strat.
>>
>> A Strat is a Fender, but I'd rather win a Gibson es175.
>
> Please do not include comp.lang.java.programmer in this discussion, as 
> it is waaaay off topic.
>

Don't feel like the Lone Ranger! It is off topic for every newsgroup to 
which it was posted.

-- 

Bill
In Hamptonburgh, NY
To email, remove the double zeroes after @


From shahargs at gmail.com  Tue Aug  7 05:34:37 2007
From: shahargs at gmail.com (shahargs at gmail.com)
Date: Tue, 07 Aug 2007 02:34:37 -0700
Subject: get wikipedia source failed (urrlib2)
In-Reply-To: <1186476847.728759.166610@o61g2000hsh.googlegroups.com>
References: <1186476847.728759.166610@o61g2000hsh.googlegroups.com>
Message-ID: <1186479277.356613.111630@r34g2000hsd.googlegroups.com>

On 7       , 11:54, shaha... at gmail.com wrote:
> Hi,
> I'm trying to get wikipedia page source with urllib2:
>     usock = urllib2.urlopen("http://en.wikipedia.org/wiki/
> Albert_Einstein")
>     data = usock.read();
>     usock.close();
>     return data
> I got exception because HTTP 403 error. why? with my browser i can't
> access it without any problem?
>
> Thanks,
> Shahar.

This source works fine for other site. the problem is in wikipedia. is
someone now any solution for this problem?



From jmtulloss at gmail.com  Thu Aug  9 15:09:35 2007
From: jmtulloss at gmail.com (Justin T.)
Date: Thu, 09 Aug 2007 19:09:35 -0000
Subject: Threaded Design Question
In-Reply-To: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
References: <1186683909.797328.68770@i13g2000prf.googlegroups.com>
Message-ID: <1186686575.192491.82820@e16g2000pri.googlegroups.com>

On Aug 9, 11:25 am, half.ital... at gmail.com wrote:
>
> Here's how I have it designed so far.  The main thread starts a
> Watch(threading.Thread) class that loops and searches a directory for
> files.  It has been passed a Queue.Queue() object (watch_queue), and
> as it finds new files in the watch folder, it adds the file name to
> the queue.
>
> The main thread then grabs an item off the watch_queue, and kicks off
> processing on that file using another class Worker(threading.thread).
>
Sounds good.

>
> I made definite progress by creating two queues...watch_queue and
> processing_queue, and then used lists within the classes to store the
> state of which files are processing/watched.
>
This sounds ugly, synchronization is one of those evils of
multithreaded programming that should be avoided if possible. I see a
couple of dirt simple solutions:

1. Have the watch thread move the file into a "Processing" folder that
it doesn't scan
2. Have the watch thread copy the file into a python tempfile object
and push that onto the queue, then delete the real file. This can be
done efficiently (well, more efficiently than new.write(old.read())
with shutil.copyfileobj(old, new)

Both those take very few lines of code, don't require synchronization,
and don't require extending standard classes.



From nospam at myisp.ifyouplease.com  Wed Aug 29 10:50:06 2007
From: nospam at myisp.ifyouplease.com (Neil Wallace)
Date: Wed, 29 Aug 2007 15:50:06 +0100
Subject: Jython 2.2 on Ubuntu
In-Reply-To: <mailman.75.1188324867.28954.python-list@python.org>
References: <-YOdnW_k3p6Fy0nb4p2dnAA@bt.com>
	<mailman.75.1188324867.28954.python-list@python.org>
Message-ID: <T5udnRHMerc_GkjbnZ2dneKdnZydnZ2d@bt.com>

Thanks Tim,

I subscribed to the Jython group hosted by sourceforge, and they are a 
great bunch of guys/gals.

Here's what I did to fix my problem.

1. removed Jython 2.1 (using Synaptic)jytho
2. added the following lines (as root) to /etc/profile
         # set PATH for Jython
             PATH=$PATH:/home/neil/jython2.2
         export PATH

I had to restart X, that's it solved!!

Neil


Tim Couper wrote:
> you need to ensure that the correct jython executable is in a directory 
> which is on your on your path.
> 
> I've just successfully test-subscribed to 
> https://lists.sourceforge.net/lists/listinfo/jython-users. Maybe you 
> could try again.
> 
> Tim
> 
> Dr Tim Couper
> CTO, SciVisum Ltd
> 
> www.scivisum.com
> 
> 
> 
> Neil Wallace wrote:
>> Hi all,
>>
>> I am a novice Python/Jython programmer, and Ubuntu user.
>>
>> Ubuntu still only supports only version 2.1 of Jython. I have used the 
>> GUI installer of Jython 2.2, and installed it to the default 
>> /root/jython2.2 directory. The install went without issues.
>>
>> However, typing ............jython --version
>> in a teminal still gives me   ........ Jython 2.1 on java (JIT: null)
>>
>> What else do I need to do?
>>
>> regards
>> Neil.
>>
>> p.s. I posted this to the jython group hosted by sourceforge, but it 
>> bounced. :-(
>>   


From jloden at jayloden.com  Thu Aug  9 13:49:30 2007
From: jloden at jayloden.com (Jay Loden)
Date: Thu, 09 Aug 2007 13:49:30 -0400
Subject: Puzzled by "is"
In-Reply-To: <46BB530B.3030304@jayloden.com>
References: <20070809173855.9FDEB1E4009@bag.python.org>
	<46BB530B.3030304@jayloden.com>
Message-ID: <46BB53AA.2090001@jayloden.com>



Jay Loden wrote:
> Dick Moores wrote:
>>  >>> () is ()
>> True
>>  >>> (1,) is (1,)
>> False
>>
>> Why?
>>
>> Thanks,
>>
>> Dick Moores
> 


>From the docs for 'is':

  The operators is and is not test for object identity: x is y is true if
  and only if x and y are the same object. x is not y yields the inverse
  truth value.



So you're actually testing whether or not the identity of the object is the
same, not whether (1,) == (1,):

>>> (1,) == (1,)
True
>>> id((0,)) == id((0,))
False

-Jay


From sdrodrian at sdrodrian.com  Sat Aug 11 10:30:03 2007
From: sdrodrian at sdrodrian.com (sdrodrian at sdrodrian.com)
Date: Sat, 11 Aug 2007 07:30:03 -0700
Subject: Do you want to know about ISLAM
Message-ID: <1186842603.707519.156590@57g2000hsv.googlegroups.com>

goglemai... at gmail.com wrote:

> Do you want to know about ISLAM,
> the fastest growing peril to the World ?

> If yes, this is the ONLY site you need visit:

      http://islamisbad.com

Or, you could just read your newspapers
with your BRAINS instead of your sheep's horns.

S D Rodrian
http://poems.sdrodrian.com
http://physics.sdrodrian.com
http://mp3s.sdrodrian.com

All religions are local.
Only science is universal.











.



From Brian.McCann at viziant.net  Wed Aug 29 14:40:57 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Wed, 29 Aug 2007 14:40:57 -0400
Subject: copying files 
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE30C@efmailx>

Hi,
 
with the code below I set a variable TEST_HOME to a path and the variable m to a path
in my current dir. 
I have a symbolic link setting m---->lib
when I run the script I get no errors and the lib dir with its 20 files does not get copied to /v01/test_home
any help would be greatly appreciated
 
--Brian

#!/usr/bin/python
import string
import os
import sys
import errno
import shutil
import tarfile
 
TEST_HOME = "/v01/test_home"
m = "./lib"
os.system("cp -r m TEST_HOME")
#os.system("tar -cvf viziant-ingestion.tar /v01/")

 
 
 
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From ladaan at iptel.org  Wed Aug  8 11:51:34 2007
From: ladaan at iptel.org (Ladislav Andel)
Date: Wed, 08 Aug 2007 17:51:34 +0200
Subject: twisted - locking threads when deferToThread is used
In-Reply-To: <4866bea60708080710ma83a713p622c2997df812a6a@mail.gmail.com>
References: <46B99CCB.1070304@iptel.org>	<4866bea60708080709v797c5a67w158f6f988ef5c304@mail.gmail.com>
	<4866bea60708080710ma83a713p622c2997df812a6a@mail.gmail.com>
Message-ID: <46B9E686.2050907@iptel.org>

And here is the code:

from twisted.internet import reactor, defer, threads

from siptest import siptest_f
from twisted.internet.threads import deferToThread


test_opts = 
{'username':'test','transport':'udp','localport':'5085','password':'test'}
domain = ['sip.1und1.de', 'sip.babble.net']

class Getter:
   
    def gotResults(self, domain, test_opts):
       
        if len(domain) != 0:
            self.d.callback(siptest_f(domain, test_opts))
        else:
            self.d.errback(ValueError("You used an odd number!"))

    def _print(self, r, domain):
       
        return domain, r
   
   
    def getServerResponse(self, domain, test_opts):
               
        self.d = threads.deferToThread(self.gotResults, domain, test_opts)
        self.d.addCallback(self._print, domain)
        return self.d

def printData(d):
    print d

def printError(failure):
    import sys
    sys.stderr.write(str(failure))

def test():
    for dom in domain:
        g = Getter()
        d = g.getServerResponse(dom, test_opts)
        d.addCallback(printData)
        d.addErrback(printError)

if __name__ == '__main__':
    test()
    reactor.run()
   


From aine_canby at yahoo.com  Tue Aug 21 05:10:36 2007
From: aine_canby at yahoo.com (aine_canby at yahoo.com)
Date: Tue, 21 Aug 2007 02:10:36 -0700
Subject: The folder a script is executed in
Message-ID: <1187687436.476773.276550@22g2000hsm.googlegroups.com>

Hi,

How do I find out what folder a script is in while it is executing?


For example, for the file "C:/folder/script.py" contain the following
two lines of code -

myLocation = GetMyLocation()
print myLocation

>> C:/folder

Thanks,

Aine.



From zyzhu2000 at gmail.com  Mon Aug 20 16:22:48 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Mon, 20 Aug 2007 20:22:48 -0000
Subject: 'REPL' style IDE
In-Reply-To: <1187638768.783508.327010@r34g2000hsd.googlegroups.com>
References: <1187632249.748945.158910@i13g2000prf.googlegroups.com>
	<1187633038.373751.244700@i38g2000prf.googlegroups.com>
	<1187638768.783508.327010@r34g2000hsd.googlegroups.com>
Message-ID: <1187641368.230780.167030@x35g2000prf.googlegroups.com>

On Aug 20, 2:39 pm, Jeff <jeffo... at gmail.com> wrote:
> python-mode in Emacs.

Yeah, but I don't know anything about Emacs and as far as I know it is
pretty complicated.



From bj_666 at gmx.net  Mon Aug  6 14:08:33 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 6 Aug 2007 18:08:33 GMT
Subject: Something in the function tutorial confused me.
References: <1186420642.112170.78940@w3g2000hsg.googlegroups.com>
	<mailman.1683.1186421435.22759.python-list@python.org>
	<1186422680.103021.105230@l70g2000hse.googlegroups.com>
Message-ID: <5hp6d1F3kl28iU4@mid.uni-berlin.de>

On Mon, 06 Aug 2007 10:51:20 -0700, Lee Fleming wrote:

> why isn't the y in def f (x, y = []): something
> garbage-collected?

`y` is a name.  Only objects are garbage collected.  There is no `y` in
that ``def`` in the sense that a local name `y` exists when the ``def`` is
executed.  The line just says there will be a local name `y` if
the function `f()` is executed and that local name will be bound to the
given object.  Which happen to be a list.  This list is referenced by the
function object, so it won't get garbage collected, and it is bound to a
local name `y` every time the function is called.  It is always the
very same list object.  And if you mutate it, this will be visible to
other calls to the function.

Ciao,
	Marc 'BlackJack' Rintsch


From gagsl-py2 at yahoo.com.ar  Mon Aug 13 01:31:31 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 13 Aug 2007 02:31:31 -0300
Subject: Pausing and Unpausing Threads
References: <1186883176.319755.304970@d55g2000hsg.googlegroups.com>
	<13bulsklq359q8f@corp.supernews.com>
	<1186950645.886995.56060@w3g2000hsg.googlegroups.com>
	<1186965947.914607.222260@o61g2000hsh.googlegroups.com>
Message-ID: <op.twzgatyfx6zn5v@a98gizw.cpe.telecentro.com.ar>

En Sun, 12 Aug 2007 21:45:47 -0300, Aaron J. M. <ajmacd at ns.sympatico.ca>  
escribi?:

> Uhg, I thought of something I didn't consider before: how to cleanly
> end the Server/DirectedControl(l)er process.

Use the same Queue; put a special kind of Action, or just a None object,  
to tell the thread that there are no more things to process.
 From the main thread, you can join() the others, waiting for them to  
finish.

-- 
Gabriel Genellina



From koje_je_ono_bilo_pitanje at bla.bla  Tue Aug 28 12:27:31 2007
From: koje_je_ono_bilo_pitanje at bla.bla (Boris Ozegovic)
Date: Tue, 28 Aug 2007 18:27:31 +0200
Subject: localhost, ?!
Message-ID: <fb1id4$kpp$1@localhost.localdomain>

Three machines, one at my home, other two at my job, in every machine there
is Win XP SP2 and Python 2.5

At home:
urllib2.urlopen("http://localhost"), everything is ok

At job:
urllib2.urlopen("http://localhost")
raise BadStatusLine(line), after half a minute.

urllib2.urlopen("http://127.0.0.1")
HTTP Error 503: Service Unavailable, immediately.

Anybody have slightest clue wthat is going on?  :-/

If I use urllib, then localhost works on every machine, and urllib2 works
on every machine when retreiving URLs outside localhost.


From mike at netadv.net  Fri Aug 17 13:37:46 2007
From: mike at netadv.net (mike)
Date: Fri, 17 Aug 2007 17:37:46 -0000
Subject: help on object programing
In-Reply-To: <1187370429.041002.205500@d55g2000hsg.googlegroups.com>
References: <1187370429.041002.205500@d55g2000hsg.googlegroups.com>
Message-ID: <1187372266.757525.16470@q3g2000prf.googlegroups.com>

On Aug 17, 11:07 am, yadin <conra2... at yahoo.com> wrote:
> class big(self):
>
>     x = 32
>     list = []
>     def inside (self):
>
>         class small(self): # a new class defined inside the first
>
>             y = 348
>             list.append(y) # send the value to first list
>             list.append(x)
>
> print list
>
> how can i define my variables so that there are valid outside the
> class???


Well, first you have to create an instance of the class big:
  bigInstance = big();

then to get to bigInstance's list you do bigInstance.list and you can
get to the list:
  print bigInstance.list;

but the list will be empty.

check out the dive into python book to understand it object oriented
programming a little more.
http://www.diveintopython.org/




From carsten at uniqsys.com  Mon Aug 20 14:31:54 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 20 Aug 2007 14:31:54 -0400
Subject: str().join() isn't working
In-Reply-To: <496954360708201116x5507358cr2f81710a62f2403e@mail.gmail.com>
References: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com>
	<496954360708201116x5507358cr2f81710a62f2403e@mail.gmail.com>
Message-ID: <1187634714.3398.33.camel@dot.uniqsys.com>

On Mon, 2007-08-20 at 13:16 -0500, Robert Dailey wrote:
> here is a more realized example of the lists I'm trying to join:
> 
> 
> _user_includes = [
> 	"../src",
> # [snip]
> 	]
> 
> _system_includes = [
> 	"../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include",
> # [snip]
> 	]

>  includes = space.join ( system._user_includes ) + " " + space.join(
>  system._system_includes )

>  The above does not work. The interpreter states: "TypeError: sequence item
>  0: expected string, list found". I'm not sure what this means. Can anyone
>  help me figure out what I'm doing wrong? Thanks.

The error message means that join() expected the list to contain
strings, but it found a list instead.

There must be something else happening that you're not telling us.
Running that join expression on the lists you quoted works just fine.
Either the lists contain something other than what you claim, or the
expression you're using is different in reality.

We can't help you if you don't post the code you're running.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From shawn.o.weekly at gmail.com  Tue Aug  7 09:36:30 2007
From: shawn.o.weekly at gmail.com (bhamdeveloper)
Date: Tue, 07 Aug 2007 13:36:30 -0000
Subject: can't import SimpleXMLRPCDisptacher from SimpleXMLRPCServer
In-Reply-To: <1186423276.861160.63610@g4g2000hsf.googlegroups.com>
References: <1186423276.861160.63610@g4g2000hsf.googlegroups.com>
Message-ID: <1186493790.984351.71610@o61g2000hsh.googlegroups.com>

On Aug 6, 1:01 pm, bhamdeveloper <shawn.o.wee... at gmail.com> wrote:
> from my server I can't import SimpleXMLRPCDispatcher.  please seehttp://intertubewaypoint.com/metaweblog/for the stacktrace/error
> message.  This onle happens on my server; I am trying to integrate the
> metaweblog api into my blog and it is barfing when trying to get that
> dispatcher.  Anyone seen this and have a quick fix?

fixed, I was doing something stupid



From paul at boddie.org.uk  Fri Aug 31 09:44:32 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Fri, 31 Aug 2007 06:44:32 -0700
Subject: pure python for sms
In-Reply-To: <mailman.196.1188565623.28954.python-list@python.org>
References: <mailman.161.1188500323.28954.python-list@python.org>
	<BtHBi.28617$4A1.5445@news-server.bigpond.net.au>
	<mailman.196.1188565623.28954.python-list@python.org>
Message-ID: <1188567872.672327.245590@50g2000hsm.googlegroups.com>

On 31 Aug, 15:36, Gerardo Herzig <gher... at fmed.uba.ar> wrote:
> Neil Hodgson wrote:
> >    This is likely to cost some money similar to sending an SMS from a
> >'phone.

[...]

> Well, im not triyng to send a SMS `FROM' a cellphone, im trying to send
> a SMS `TO' a cellphone.

Yes, but he did write "similar to", meaning that regardless of how the
message is prepared, sending it may cost someone some money - the
typical "financial effect" when you send a message from an actual
telephone.

> Here (in Argentina) are several sites who lets you send a sms for free. You also can receive
> SMS responses via this pagehttp://sms.personal.com.ar/Mensajes/msn.htm

I guess you're thinking about a library like SMSLib:

http://smslib.org/

This seems to combine the two most obvious ways of sending such
messages: communicate with a device already located on the GSM
network; communicate with a gateway which relays messages to the GSM
network.

> While my tries using this page via urllib failed, i dont want to depend
> on an external page anyway. The  python class you  send to me looks like
> a  pay site (if not, i dont see why the tokenpay() and getbalance()
> methods :)
>
> I was also avaiable to send a sms in the form of an plain email
> __cellphone_number at i_used_to_be_cool_smtp.com, but it not seems to work
> this way no longer. Again, i dont want to do it that way anyway.

Yes, both of the above (use of a Web site or an e-mail relay) rely on
existing services. If you don't want to do that, you'll need to
connect directly to your own GSM-capable device, I imagine.

> Thats why im looking for a python implementation of that funcionality.

I don't know how well SMSLib works with Jython or whether you could
take a PyLucene-like approach and wrap it for CPython using SWIG or
some other wrapper technology in conjunction with gcj, but that's one
approach. Another is to look into libraries which communicate with
mobile devices: I extended one called t616hack [1] and made it almost
capable of telling my T610 telephone to send messages, but another
candidate would be python-gammu [2]. A while back someone stumbled
across a GSM hardware module which has embedded Python as a feature
[3], but I imagine that a lot of GSM-capable hardware uses AT-like
commands to support such activities.

Of course, I've probably covered an area that you're not directly
interested in, but someone has to provide a link to the GSM network,
either in the network infrastructure or by using some kind of GSM
device. If you're not a GSM network operator then it's likely that
you're either going to need to deal with a network operator, perhaps
indirectly, or you'll need to join the GSM network with a suitable
device in the "normal" way.

Paul

[1] http://www.python.org/pypi/t616hack
[2] http://cihar.com/gammu/python/
[3] http://www.telit.co.it/product.asp?productId=113



From ricaraoz at gmail.com  Tue Aug 21 20:23:25 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Tue, 21 Aug 2007 21:23:25 -0300
Subject: IDE for Python
In-Reply-To: <1187698999.545439.322600@k79g2000hse.googlegroups.com>
References: <mailman.55.1187690455.32294.python-list@python.org>
	<1187698999.545439.322600@k79g2000hse.googlegroups.com>
Message-ID: <46CB81FD.5070101@bigfoot.com>

king kikapu wrote:
> On Aug 21, 12:00 pm, Joel Andres Granados <joel.grana... at gmail.com>
> wrote:
>> Hello list:
>>
>> I have tried various times to use an IDE for python put have always been
>> disapointed.
> 
> 
> I have also tried a lot of them (IDEs) in the last year. I was finally
> happy with Eclipse/Pydev but i was always wanted a more "true" IDE for
> Python.
> I think i found it in Eric4 http://www.die-offenbachs.de/eric/index.html
> You can download from here http://www.riverbankcomputing.co.uk/pyqt/download.php
> (binary installer for Windows that contains Eric and PyQt)
> and have a look at it!
> 

Hi,
	Do you know if for in-house development a GPL license applies? (Qt4
and/or Eric4).




From __peter__ at web.de  Thu Aug 23 17:53:53 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 23 Aug 2007 23:53:53 +0200
Subject: comparing two lists
References: <mailman.180.1187886381.32294.python-list@python.org>
	<fakgtj$c3d$00$1@news.t-online.com>
	<mailman.190.1187892928.32294.python-list@python.org>
Message-ID: <fakvli$4da$01$1@news.t-online.com>

Ladislav Andel wrote:

> Peter Otten wrote:
>> Ladislav Andel wrote:
>>
>>   
>>> what would be the most efficient way to do following?
>>>
>>> I have a list of dictionaries  taken from DB e.g.
>>> dblist = [{'id:1, 'host':'google.com','ip_address':'1.2.3.4'},
>>> {'id:3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
>>> {'id:9, 'host':'msn.com','ip_address':'11.3.2.3'}]
>>>
>>> and list of object instances in memory(it's just for example)
>>> which are looping within itself and testing particular hosts
>>>
>>> memlist = [<instance 1>,<instance 2>]
>>> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
>>> memlist[1].id  is 9 and  memlist[1].host is msn.com etc.
>>>
>>> Now I want to add a new instance to memlist since id=3(in dblist) is not
>>> in memlist.
>>> How would you iterate through it and insert a new instance?
>>>
>>> The result should be:
>>> memlist = [<instance 1>,<instance 2>, <instance 3>]
>>> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
>>> memlist[1].id  is 3 and  memlist[1].host is yahoo.com etc.
>>> memlist[2].id  is 9 and  memlist[2].host is msn.com etc.
>>>     
>>
>> You should replace the memlist with a dictionary using (host, id) tuples
>> as the keys. Here's an example that uses a set but requires you to modify
>> the <instance N> class:
>>
>> dblist = [{'id':1, 'host':'google.com','ip_address':'1.2.3.4'},
>> {'id':3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
>> {'id':9, 'host':'msn.com','ip_address':'11.3.2.3'}]
>>
>> class Item(object):
>>     def __init__(self, id, host, **discarded):
>>         self._tuple = (id, host)
>>     def __hash__(self):
>>         return hash(self._tuple)
>>     def __eq__(self, other):
>>         return self._tuple == other._tuple
>>     def __repr__(self):
>>         return "Item(id=%r, host=%r)" % self._tuple
>>
>> items = set([Item(1, "google.com")])
>> for d in dblist:
>>     item = Item(**d)
>>     if item not in items:
>>         print "adding", item
>>         items.add(item)
>>     else:
>>         print item, "already there"
>>
>>   
> Thank you for this nice solution. I wouldn't be able to write it this
> way at all

Then think twice before you use it. The dictionary approach should be
straightforward.

> but what about removing from memlist if there is less items in dblist
> than in items (instances)?
> I will have to iterate over items(instances) and remove that one which
> is not in dblist I guess.

Yes, but again, if you use a dictionary instead of a list the lookup will be
efficient.

To follow up on my previous post: with sets there is a concise spelling:

items &= set(Item(**d) for d in dblist)

or even

items.intersection_update(Item(**d) for d in dblist)

if you don't mind object identity.

Peter



From korovev76 at gmail.com  Tue Aug  7 03:30:27 2007
From: korovev76 at gmail.com (korovev76 at gmail.com)
Date: Tue, 07 Aug 2007 00:30:27 -0700
Subject: parsing a dbIII file
In-Reply-To: <mailman.1707.1186471320.22759.python-list@python.org>
References: <1186469710.277542.246430@w3g2000hsg.googlegroups.com>
	<mailman.1707.1186471320.22759.python-list@python.org>
Message-ID: <1186471827.183979.206700@r34g2000hsd.googlegroups.com>

On 7 Ago, 09:21, Steve Holden <st... at holdenweb.com> wrote:

> That's not a standard dBaseIII data file though, correct? It looks more
> like something that was produced *from* a dBaseIII file.
yeap... unfortunately it is not...



> Good luck with your escape from COBOL!

i'm not escaping by now... Actually I'd like to use cobol for the rest
of my life (as a programmer) ;-)
But thanx anyway!

korovev



From __peter__ at web.de  Thu Aug 23 13:42:09 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 23 Aug 2007 19:42:09 +0200
Subject: comparing two lists
References: <mailman.180.1187886381.32294.python-list@python.org>
Message-ID: <fakgtj$c3d$00$1@news.t-online.com>

Ladislav Andel wrote:

> what would be the most efficient way to do following?
> 
> I have a list of dictionaries  taken from DB e.g.
> dblist = [{'id:1, 'host':'google.com','ip_address':'1.2.3.4'},
> {'id:3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
> {'id:9, 'host':'msn.com','ip_address':'11.3.2.3'}]
> 
> and list of object instances in memory(it's just for example)
> which are looping within itself and testing particular hosts
> 
> memlist = [<instance 1>,<instance 2>]
> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
> memlist[1].id  is 9 and  memlist[1].host is msn.com etc.
> 
> Now I want to add a new instance to memlist since id=3(in dblist) is not
> in memlist.
> How would you iterate through it and insert a new instance?
> 
> The result should be:
> memlist = [<instance 1>,<instance 2>, <instance 3>]
> memlist[0].id  is 1 and  memlist[0].host is google.com etc.
> memlist[1].id  is 3 and  memlist[1].host is yahoo.com etc.
> memlist[2].id  is 9 and  memlist[2].host is msn.com etc.

You should replace the memlist with a dictionary using (host, id) tuples as
the keys. Here's an example that uses a set but requires you to modify the
<instance N> class:

dblist = [{'id':1, 'host':'google.com','ip_address':'1.2.3.4'},
{'id':3, 'host':'yahoo.com','ip_address':'5.6.7.8'},
{'id':9, 'host':'msn.com','ip_address':'11.3.2.3'}]

class Item(object):
    def __init__(self, id, host, **discarded):
        self._tuple = (id, host)
    def __hash__(self):
        return hash(self._tuple)
    def __eq__(self, other):
        return self._tuple == other._tuple
    def __repr__(self):
        return "Item(id=%r, host=%r)" % self._tuple

items = set([Item(1, "google.com")])
for d in dblist:
    item = Item(**d)
    if item not in items:
        print "adding", item
        items.add(item)
    else:
        print item, "already there"

Peter


From steve at holdenweb.com  Sun Aug 12 06:34:50 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Aug 2007 06:34:50 -0400
Subject: Web based Reporting tool for Python
In-Reply-To: <1186891194.582444.222010@r34g2000hsd.googlegroups.com>
References: <1186460956.945148.162610@k79g2000hse.googlegroups.com>	<mailman.1722.1186522221.22759.python-list@python.org>	<1186547726.383996.291360@d55g2000hsg.googlegroups.com>	<2007080808575016807-jon@turnthepageorg>
	<1186891194.582444.222010@r34g2000hsd.googlegroups.com>
Message-ID: <f9mno6$tgl$1@sea.gmane.org>

Madhu Alagu wrote:
> On Aug 8, 4:57 pm, Jon Rosebaugh <j... at turnthepage.org> wrote:
>> On 2007-08-07 23:35:26 -0500, Madhu Alagu <alma... at gmail.com> said:
>>
>>> Thanking so much for all the informations and links.I would like to
>>> use Mako Templates(www.makotemplates.org).Ilike to use simple and
>>> python default module...
>> Mako is an excellent template system, but you'll have a lot of work to
>> do making it into a reporting system.
> 
> 
> 
> Any reporting template in python ?
> 

Dabo (www.dabodev.com) is certainly heading that way, but I am not sure 
how far it's got yet.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bignose+hates-spam at benfinney.id.au  Tue Aug 28 20:58:27 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 29 Aug 2007 10:58:27 +1000
Subject: "Try:" which only encompasses head of compound statement
References: <1188250535.607963.42540@22g2000hsm.googlegroups.com>
	<87wsvgfszm.fsf@benfinney.id.au>
	<13d7898odj2g19b@corp.supernews.com>
	<87fy24fdgf.fsf@benfinney.id.au>
	<1188345076.396437.111160@w3g2000hsg.googlegroups.com>
Message-ID: <873ay3f970.fsf@benfinney.id.au>

Jameson.Quinn at gmail.com writes:

> In real life, I want to set some return values to sensible defaults
> if the file doesn't exist, but I want the errors from inside the
> block to trickle up as normal.

Sure. Just be careful only to catch the exceptions that you do want to
handle at that level of the code, and the others will propagate
normally.

> And yes, I can easily use a temporary variable for the open file,
> but it really seems to me that this defeats the purpose of the
> 'with' statement - if this were something more dangerous than a
> file, I'd feel mighty leery of having it in a temporary variable
> outside a 'with' for even a moment.

You seem to be confused about one or both of "variables" (which Python
doesn't really have) and the 'with' statement.

When you write::

    input_file = open("foo.txt")
    with input_file:
        # do stuff

there's no "temporary variable". You've merely bound the name
'input_file' to the file object; it's the same file object as is then
used in the 'with' statement. You could bind a dozen other names to
the object and it would still be the same file object.

So, when the 'with' block exits, the context manager will close the
file object, no matter how many names you bind to it.

> So, the options are:
> -temporary variable - could this EVER be more dangerous than the with
> statement (KeyboardInterrupt which is later caught and handled?)

Since it's not a "temporary variable" but rather just a way to refer
to the file object, I don't see the issue you're describing. However
you refer to it, that one file object will be closed when the 'with'
block exits.

> -'tunnel' internal exceptions past the try by wrapping them in a
> TunnelException and then unwrapping them with a containing try block.
> 
> The second looks like a hack to me

Yes, it is. Catch the exceptions you want to handle, let the rest
propagate normally. The context manager created by the 'with'
statement will handle closing the file *and* propagate the exception
normally.

    <URL:http://www.python.org/dev/peps/pep-0343/>

> and the first still feels dangerous.

If it's still that way, perhaps you could be more explicit about what
danger you think exists?

-- 
 \     "Are you pondering what I'm pondering?" "I think so, Brain, but |
  `\    pants with horizontal stripes make me look chubby."  -- _Pinky |
_o__)                                                   and The Brain_ |
Ben Finney


From kyosohma at gmail.com  Mon Aug  6 13:25:15 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 06 Aug 2007 17:25:15 -0000
Subject: Tkinter or wxpython?
In-Reply-To: <46B73DE4.6040405@codebykevin.com>
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1550.1186099225.22759.python-list@python.org>
	<1186410331.905174.21370@q3g2000prf.googlegroups.com>
	<7xps204tin.fsf@ruckus.brouhaha.com>
	<46B73DE4.6040405@codebykevin.com>
Message-ID: <1186421115.402000.88080@x35g2000prf.googlegroups.com>

On Aug 6, 10:27 am, Kevin Walzer <k... at codebykevin.com> wrote:
> Paul Rubin wrote:
>
> > Tkinteger (dang, I always end up typing it that way, I won't even
> > bother fixing the error) is easy to use for simple gui's, and it's
> > part of the standard python distro which for me is a big advantage (no
> > extra crap to download).  However, the widget set is rather ugly and
> > doesn't blend in well with anyone's native widgets; the widget
> > selection itself is rather narrow, and I think kyosohma may be right
> > that it doesn't scale well to complex gui's.  I've looked at the code
> > for IDLE's gui and it's terrifying.
>
> It's entirely possible to make sophisticated GUI's in Tkinter, but you
> are right, most people don't. Part of the issue is that Tkinter
> developers haven't kept up with what's going on in Tk and instead use
> outdated, ugly widget sets like Tix, PMW, and so on. Making use of the
> available wrappers for current Tk libraries such as BWidgets, Tile,
> Tablelist, TkTreeCtrl, and so on allows you to make UI's every bit as
> polished as what comes with wxPython: tree views, multi-column lists,
> notebook tabs, comboboxes, etc., with platform-specific theming
> (XP/Vista, Aqua/OS X, and X11).
>
> For more references, see:
>
> http://tkinter.unpythonic.net/wiki/TileWrapperhttp://tkinter.unpythonic.net/wiki/TableListWrapperhttp://tkinter.unpythonic.net/wiki/TableListTileWrapperhttp://tkinter.unpythonic.net/wiki/PyLocatehttp://tkinter.unpythonic.net/wiki/PyLocateTilehttp://tkinter.unpy.net/bwidget/http://tkinter.unpy.net/wiki/NoteBookhttp://klappnase.zexxo.net/TkinterTreectrl/index.html
>
>
>
>

I tried the PMW widget toolkit. It was ok, but it seemed kind of
buggy. I found out about Tix on a forum of some sort. When I tried to
find out how to get it and use it, all I found was conflicting
information. I finally got it downloaded only to find I had to compile
it and I didn't have the right version of TCL. So I switched to
wxPython then. Months later I found out that Tix is now included with
Python.

I still don't know how to use it though. As with most external Tkinter
widget sets, Tix doesn't have examples. The docs look less inviting
than man pages...but I realize that's probably just me. I just don't
like man pages much.

Thanks for the info though. You never know when you might need another
toolkit for a specialized job.

Mike



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Aug 30 04:43:57 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 30 Aug 2007 10:43:57 +0200
Subject: list index()
In-Reply-To: <878x7te9h4.fsf@benfinney.id.au>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<878x7te9h4.fsf@benfinney.id.au>
Message-ID: <46d68343$0$401$426a34cc@news.free.fr>

Ben Finney a ?crit :
> Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> writes:
> 
>> What's with using your brain instead of whining ?
> 
> Now now, no need for snappiness. If you don't feel a constructive
> response is merited, please ignore.

Yes, you're right. Sorry.



From rozniy at gmail.com  Tue Aug  7 05:13:38 2007
From: rozniy at gmail.com (rozniy)
Date: Tue, 07 Aug 2007 02:13:38 -0700
Subject: How to use C enum in Python CTypes?
In-Reply-To: <5hqgogF3ldifeU1@mid.uni-berlin.de>
References: <1186462639.872254.25660@z24g2000prh.googlegroups.com>
	<5hqgogF3ldifeU1@mid.uni-berlin.de>
Message-ID: <1186478018.409193.188130@e9g2000prf.googlegroups.com>

On Aug 7, 2:11 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Tue, 07 Aug 2007 04:57:19 +0000, rozniy wrote:
> > typedef enum olss_tag
> >    {
> >    OLSS_AD,
> >    OLSS_DA,
> >    OLSS_DIN,
> >    OLSS_DOUT,
> >    OLSS_SRL,
> >    OLSS_CT
> >    }
> > OLSS;
>
> > I managed to fudge the HDEV, UINT and PHDASS types as CTypes c_long(),
> > but I am not sure how translate a C enum into Python...
>
> > This site
> >http://python.net/crew/theller/ctypes/tutorial.html#bugs-todo-and-non...
>
> > says that enumeration types is not implemented,
> > "Enumeration types are not implemented. You can do it easily yourself,
> > using c_int as the base class."
>
> I would just define constants:
>
> (OLSS_AD,
>  OLSS_DA,
>  OLSS_DIN,
>  OLSS_DOUT,
>  OLSS_SRL,
>  OLSS_CT) = map(ctypes.c_int, xrange(6))
>
> Ciao,
>         Marc 'BlackJack' Rintsch- Hide quoted text -
>
> - Show quoted text -


Wouldn't that assign integer values 0 to 5 to the things? I don't know
if it'll give me the correct results.



From zhushenli at gmail.com  Wed Aug 29 05:09:55 2007
From: zhushenli at gmail.com (Davy)
Date: Wed, 29 Aug 2007 02:09:55 -0700
Subject: How to parse this line of code manually
In-Reply-To: <1188300534.952616.109760@o80g2000hse.googlegroups.com>
References: <1188270013.785762.9360@z24g2000prh.googlegroups.com>
	<1188271385.875677.78560@i38g2000prf.googlegroups.com>
	<slrnfd7lev.phn.hat@se-162.se.wtb.tue.nl>
	<1188300534.952616.109760@o80g2000hse.googlegroups.com>
Message-ID: <1188378595.303053.186900@e9g2000prf.googlegroups.com>

On Aug 28, 7:28 pm, Dustan <DustanGro... at gmail.com> wrote:
> On Aug 28, 2:59 am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>
>
>
>
>
> > On 2007-08-28, Davy <zhushe... at gmail.com> wrote:
>
> > > On Aug 28, 11:00 am, Davy <zhushe... at gmail.com> wrote:
> > >> Hi all,
>
> > >> It is well known that Python is appreciated for its merit of concise.
> > >> However, I found the over concise code is too hard to understand for
> > >> me.
>
> > >> Consider, for instance,
> > >> def known_edits2(word):
> > >>     return set(e2 for e1 in edits1(word) for e2 in edits1(e1) if e2 in
> > >> NWORDS)
>
> > >> Shall I understand the code in set() as
> > >> for e2 in edits1(e1) {
> > >>     if e2 in NWORDS {
> > >>         for e1 in edits1(word) {
> > >>              e2
> > >>         }
> > >>     }
>
> > >> }
>
> > > [SNIP]
> > > Hi all, I figured it myself. It is left to righ parse, right?
> > > So the above one is like
> > > for e1 in edits1(word) {
> > >     for e2 in edits1(e1) {
> > >         if e2 in NWORDS {
> > >             push e2 to set
> > >         }
> > >     }
> > > }
>
> > This is correct, although I am not sure what language you are using here, it
> > looks like a strange mix of Python and C to me.
>
> > >> Any suggestions are welcome!
>
> > The idea is known as List comprehension (for lists, obviously), and comes from
> > functional programming, Bird & Wadler used it in their book.
>
> > The notation is very close to mathematics:
>
> >  { e2 | e1: edits(word), e2: edits(e1) in NWORDS }
>
> > or in LaTeX:
>
> > $\{ e_2 | \forall e_1: \mathrm{edits}(\mathrm{words}),
> >           \forall e_2: \mathrm{edits}(e_1) \in \mathrm{NWORDS} \}$
>
> > :-)
>
> > (which in words is something like: collect values e2, where e1 comes from
> > 'edits(word)', e2 comes from 'edits(e1)', and e2 in NWORDS)
>
> For more examples:http://docs.python.org/tut/node7.html#SECTION007140000000000000000
[SNIP]
Hi Hofkamp and Dustan,

Thank you for your help :)

Davy
>
> A 'list comprehension' with parentheses instead of square-brackets
> creates a generator instead of a list, which can be more memory-
> efficient and allows for lazy evaluation.- Hide quoted text -
>
> - Show quoted text -




From vedrandekovic at v-programs.com  Thu Aug 23 02:42:52 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Wed, 22 Aug 2007 23:42:52 -0700
Subject: redirect or cover .bat log
In-Reply-To: <1187810295.951965.239300@m37g2000prh.googlegroups.com>
References: <1187764689.836375.212730@z24g2000prh.googlegroups.com>
	<5j26bvF3s7lbpU2@mid.uni-berlin.de>
	<1187767578.925671.107000@q4g2000prc.googlegroups.com>
	<5j2br6F3r2avsU1@mid.uni-berlin.de>
	<1187787876.962883.66970@r34g2000hsd.googlegroups.com>
	<1187791309.427046.22400@q3g2000prf.googlegroups.com>
	<1187810295.951965.239300@m37g2000prh.googlegroups.com>
Message-ID: <1187851372.042098.297240@q4g2000prc.googlegroups.com>

On 22 kol, 21:18, vedrandeko... at v-programs.com wrote:
> On 22 kol, 16:01, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
>
>
>
> > On 22 ago, 10:04, vedrandeko... at v-programs.com wrote:
>
> > > > >> > e.g I need run my my_scripts_setup.bat that contain:
>
> > > > >> > python myscript_setup.py py2exe
>
> > > > >> > Can I cover or redirect log of that process into my wx program?
> > > > >> > I'am using Windows XP SP2, and Python 2.5.
>
> > Try the subprocess module. For the single line command you posted
> > earlier, you don't even need the bat file:
>
> > import subprocess
> > p = subprocess.Popen(["python", "myscript_setup.py", "py2exe"],
> > stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
> > p.wait()
> > output_from_process = p.stdout.readlines()
>
> > This would be fine if executing the script takes relatively a short
> > time and doesn't generate so many output lines; there are other
> > examples in the subprocess module documentation <http://
> > docs.python.org/lib/module-subprocess.html>
>
> > --
> > Gabriel Genellina
>
> Hi,
>
> This works fine.
> Thanks!

Hi,

This,works fine except this last line:

 output_from_process = p.stdout.readlines()

I get an error:

p has not attribute stdout

Regards,
Vedran



From DustanGroups at gmail.com  Mon Aug 20 07:35:04 2007
From: DustanGroups at gmail.com (Dustan)
Date: Mon, 20 Aug 2007 11:35:04 -0000
Subject: Where we need to use Python ?
In-Reply-To: <1187596936.136499.200280@l22g2000prc.googlegroups.com>
References: <1187596936.136499.200280@l22g2000prc.googlegroups.com>
Message-ID: <1187609704.907035.297430@a39g2000hsc.googlegroups.com>

On Aug 20, 3:02 am, gperu... at gmail.com wrote:
> Hi
>
> Iam new to Python
> I know Perl, JScript,C,C++,Java
> But i want to know where excatly this python come in to picture
>
> And Is it a interpreted language or a programming language
> It comes in which category
>
> I very keen to know this please tell
>
> Regards
> Ganesh P

http://www.python.org



From lasses_weil at klapptsowieso.net  Fri Aug 31 18:41:53 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Sat, 01 Sep 2007 00:41:53 +0200
Subject: Question involving a Python app...
In-Reply-To: <mailman.201.1188572420.28954.python-list@python.org>
References: <1188571968.529938.55770@i38g2000prf.googlegroups.com>
	<mailman.201.1188572420.28954.python-list@python.org>
Message-ID: <46d89931$0$7685$9b4e6d93@newsspool2.arcor-online.net>

Simon Brunning wrote:
> On 8/31/07, sberry <sean at buildingonline.com> wrote:
>> So, how do I create an executable (on Windows)
>> to install the program so it will run without the aforementioned
>> framework being installed?
> 
> Check out py2exe.
> 
Uhm, just an idea ... Can't we (that is, someone else) set up a 
reply-bot that spots FAQs and post the appropriate FGAs?

/W


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Aug 10 10:29:07 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 10 Aug 2007 16:29:07 +0200
Subject: wxPython before MainLoop
References: <13bl9a75laqcm70@corp.supernews.com>
	<13bnh5bs4b9h427@corp.supernews.com>
Message-ID: <5i3b1jF3n5bdtU1@mid.individual.net>

[david] wrote:

> I'm disappointed that I didn't get a wxPython solution.
> 
> If the only way to get wxPython to correctly handle
> this simple task is to code around it, 

LOL -- did you try coding this app with native windows means, like
MFC? You will have *exactly* the same problem, and *exactly* for
the same reason. The organisation of wxWidgets (and thus, wxPython)
is very near to Windows GUI coding philosophy.

> I don't think wxPython is really ready for Windows.

I suggest you first went getting experience with other GUI libraries
before you make such statements. 

Also, wxPython is a thin wrapper around wxWidgets C++ library which
is widely used for Windows apps. And with wxWidgets, you'd *also*
have the same problem.

> Bjoern, you're wrong. The GUI needs to be displayed
> for the user to analyse. A delay between display and
> readiness is much better than a delay before display
> or a delay with the GUI half-drawn.

This may be, but it strongly depends on the application itself.
 
> Mike, the screen does display correctly, it's just
> that in Windows, screen updates are not processed
> while the application is busy.

That's the matter in just about *every* GUI framework using an event
loop. And I don't know any that doesn't. Thus, there are two widely
used standard solutions:

* use a worker thread, or

* call a "process all pending events now" function repeatedly during
  the work (here: wx.Yield, wx.SafeYield, wx.YieldIfNeeded).

Regards,


Bj?rn

-- 
BOFH excuse #92:

Stale file handle (next time use Tupperware(tm)!)



From steve at holdenweb.com  Thu Aug 23 23:56:35 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 23 Aug 2007 23:56:35 -0400
Subject: optparse - required options
In-Reply-To: <z92dnfwLKf9z1FPbnZ2dnUVZ_oesnZ2d@comcast.com>
References: <496954360708201251r137dfaedqe632361891eae343@mail.gmail.com>	<46C9F7D1.9040506@jayloden.com>	<496954360708201353v19ea266cr50f144d1d71d5912@mail.gmail.com>	<46CA0814.6050200@jayloden.com>	<mailman.181.1187886467.32294.python-list@python.org>
	<z92dnfwLKf9z1FPbnZ2dnUVZ_oesnZ2d@comcast.com>
Message-ID: <falktp$27f$2@sea.gmane.org>

Steven Bethard wrote:
> Omari Norman wrote:
>> On Mon, Aug 20, 2007 at 05:31:00PM -0400, Jay Loden wrote:
>>> Robert Dailey wrote:
>>>> Well, I don't know what is wrong with people then. I don't see how
>>>> required arguments are of bad design.
>>> I tend to agree...while "required option" may be an oxymoron in
>>> English, I can think of quite a few scripts I've written myself (in
>>> various languages) that needed at least some kind of user input to
>>> operate.
>> The idea with optparse is not that programs should not require certain
>> information on the command line; rather, the idea is that this
>> information should be positional arguments, not 'options'.
>>
>> That is, to use the compiler example:
>>
>> compiler file
>>
>> is preferred if a file argument is necessary.
>>
>> compiler --file file
>>
>> is not preferred.
> 
> I agree with the optparse philosophy, but Practicality Beats Purity. 
> That's why I was convinced to add "required options" to argparse -- 
> there are too many applications that want that kind of interface.
> *I* don't write applications with interfaces like that, but enough 
> people do that the use case should really be supported.
> 
Well, here's to software producers who listen to their users!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From steve at holdenweb.com  Thu Aug 30 06:59:28 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 30 Aug 2007 06:59:28 -0400
Subject: Python doesn't see the directories I create
In-Reply-To: <46d6856b$0$17674$426a74cc@news.free.fr>
References: <ldvBi.293202$LE1.92748@newsfe13.lga>
	<46d6856b$0$17674$426a74cc@news.free.fr>
Message-ID: <fb67ui$r8c$1@sea.gmane.org>

Bruno Desthuilliers wrote:
> mr_gadget a ?crit :
>> When I create a subfolder, python is not seeing it. Can someone please 
>> explain this behaviour ? I just started with python, read the tutorial over 
>> the weekend and am writing my very first script. So I may not be seeing 
>> something. Both os.path and glob.glob seem not to see a folder I created. 
>> Other sibling folders seem to work fine. On a whim I tried paths with \\ 
>> double slashes and that worked. But why should single slashes work for some 
>> folders and not for others ??
> 
Note you *didn't* try paths with double slashes, you merely correctly 
represented the paths with single slashes :-)

> s/slash/antislash/g
> 
> It's a very well known gotcha due to MS's choice to use the antislash as 
> path separator. In most languages - Python included - the antislash is 
> used for escape sequences (non-printable characters). '\r' is the escape 
> sequence for CR (carriage return). Doubling the antislash prevents 
> escaping.
> 
> You can avoid all escaping by using raw strings:
> 
> mypath = r"C:\enhancement\rawfiles\"
> 
Please note that the above is a well-known syntax error. A string 
literal cannot end with a single backslash, as it escapes the closing quote.

 >>> mypath = r"C:\enhancement\rawfiles\"
   File "<stdin>", line 1
     mypath = r"C:\enhancement\rawfiles\"
                                        ^
SyntaxError: EOL while scanning single-quoted string
 >>>

> Also and IIRC, using slash instead should also work, ie:
> 
> mypath = r"C:/enhancement/rawfiles/"
> 
That does indeed work in most situations, but ideally (i.e. for maximum 
code portability) paths should be constructed using os.path.join(), or 
collected from the environment somehow.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From google at mrabarnett.plus.com  Fri Aug 31 13:03:47 2007
From: google at mrabarnett.plus.com (MRAB)
Date: Fri, 31 Aug 2007 10:03:47 -0700
Subject: strings (dollar.cents) into floats
In-Reply-To: <mailman.218.1188577696.28954.python-list@python.org>
References: <mailman.140.1188483282.28954.python-list@python.org>
	<877incd20i.fsf@benfinney.id.au>
	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
	<1188575044.874256.42960@50g2000hsm.googlegroups.com>
	<fb9eas$tnc$1@sea.gmane.org>
	<mailman.218.1188577696.28954.python-list@python.org>
Message-ID: <1188579827.947563.13880@50g2000hsm.googlegroups.com>

On Aug 31, 5:28 pm, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/31/07, Steve Holden <st... at holdenweb.com> wrote:
>
> > sturlamolden wrote:
> > > On 31 Aug, 02:12, Wildemar Wildenburger
> > > <lasses_w... at klapptsowieso.net> wrote:
>
> > >> I've heard (ok, read) that several times now and I understand the
> > >> argument. But what use is there for floats, then? When is it OK to use them?
>
> > > There are fractions that can be exactly represented by floats that
> > > cannot be exactly represented by decimals.
>
> > Would you care to give an example?
>
> > > There are fractions that
> > > can be exactly represented by decimals that cannot be exactly
> > > represented by floats.
>
> > > Which one is better? Which do we prefer?
>
> > > What a float cannot do is to represent a decimal fractional number
> > > (e.g. 1.1) exactly. If we need that, we cannot use floats. A notable
> > > example is monetary computations, it covers 99% of the use for decimal
> > > numbers in computers. For this reason, we should never use floats to
> > > add 10 cents to a dollar. The use of decimals for monetary
> > > calculations is mandatory.
>
> > That last sentence is patent nonsense, and completely untrue. Many
> > satisfactory financial applications have been written using only
> > floating-point arithmetic. Indeed I believe the accountant's Swiss army
> > knife, the Excel spreadsheet, uses floating-point numbers exclusively.
>
> This is true, although Excel munges it's FP to provide "expected" results.
>
> It depends on what you consider a "financial" application though.
> Excel, while in extremely broad use, is not used to implement any of
> the systems which actually "define" money, like the back end financial
> systems at banks and credit unions.
>
> In my experience, by far the most common method of calculating
> financial numbers is actually using integer amounts, and then applying
> well-defined rounding rules which I can't be bothered to look up the
> name for.
>
> For what it's worth, the work that I do with money (which is
> middleware doing data transport, not calculations or billing) uses
> either string representations or fixed point.
>
> > What you say about floating-point have speed advantages is true, but you
> > go too far in claiming that decimal arithmetic is mandatory for monetary
> > calculations. That's about as sensible as saying that base 12 and base
> > 20 arithmetic units were required to calculate in pounds, shillings and
> > pence.
>
> I believe that to the degree that "real" accounting was done in those
> currencies it did in fact use non-decimal bases. Just as people don't
> use decimal time values (except us crazy computer folk), you're write
> 1 pound 4 shillings, not 1.333... pounds.
>
FYI, 1 pound 4 shillings was 1.20 pounds; 1.333... pounds was 1 pound
6 shillings 8 pence. I think...



From jonas.esp at googlemail.com  Sat Aug 18 04:41:29 2007
From: jonas.esp at googlemail.com (Kless)
Date: Sat, 18 Aug 2007 01:41:29 -0700
Subject: Encryption and hashing
In-Reply-To: <7x1we1eoiy.fsf@ruckus.brouhaha.com>
References: <1187377630.017794.36510@50g2000hsm.googlegroups.com>
	<mailman.2122.1187379425.22759.python-list@python.org>
	<1187392383.237609.97250@19g2000hsx.googlegroups.com>
	<7x1we1eoiy.fsf@ruckus.brouhaha.com>
Message-ID: <1187426489.420964.132380@g4g2000hsf.googlegroups.com>

On 18 ago, 00:20, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Kless <jonas.... at googlemail.com> writes:
> > So it haven't Twofish, Serpent, neither Whirlpool. Neither many others.
>
> Unless you have an interoperability requirement or some other specific
> issue, you should stick with AES and the SHA2 family.  Don't make your
> own cipher selections unless you know completely what you're doing.
> This is especially the case for business applications in the US, since
> AES and SHA are US federal standards and if you use them and something
> goes wrong with them, you can at least say you followed the standard.
> If you use anything else, you will have more to answer for.

Well, I only know that I choose the best public cryptographic
algorithms.

SHA-2 has been designed by the National Security Agency (NSA), and I'm
sure that many people trust on the NSA so that every people make its
election.
But I'm sure that many people will avoid use algorithms recommend by
the governement. And I don't know why :P, they always say the truth
and we must trust on them. I'm sure that having great experts on
cryptography they are not bee able of put a backdoor indetectable or
better to debilitate the algorithm so that it is easier to break it.



From george at nospam.invalid  Sun Aug 19 16:13:14 2007
From: george at nospam.invalid (George)
Date: Sun, 19 Aug 2007 16:13:14 -0400
Subject: Latest models of Gibson guitars
In-Reply-To: <1187548916.909340.37420@k79g2000hse.googlegroups.com>
References: <1187544898.289948.322160@22g2000hsm.googlegroups.com>
	<1187548916.909340.37420@k79g2000hse.googlegroups.com>
Message-ID: <Oo2dnTKtZ_4aPlXbnZ2dnUVZ_vydnZ2d@comcast.com>

vedrandekovic at v-programs.com wrote:
> On 19 kol, 19:34, mobile... at gmail.com wrote:
>> Reviews of latest models of best guitars, fender, gibson, yamaha, and
>> many more, with pictures and prices.
>>
>> http://spam-guitars.blogspot.com/
>>
>> And if you want to win a free guitar go here
>>
>> http://spamguitars.blogspot.com/
> 
> Hello,
> 
> This is  a newsgroup of programming language Python, stop with this!
> 
> Regards,
> Vedran
> 

Thank Google for it. They own blogspot and officially encourage their 
users to look for click revenue. Then the users spam newsgroups using 
Google, the spammers friend.


From cousinstanley at gmail.com  Wed Aug  1 16:28:39 2007
From: cousinstanley at gmail.com (Cousin Stanley)
Date: Wed, 01 Aug 2007 15:28:39 -0500
Subject: access the name of my method inside it
References: <1185959202.302467.276080@x35g2000prf.googlegroups.com>
	<5hb1ebF3inuf2U6@mid.uni-berlin.de>
	<1185973639.234450.305690@g12g2000prg.googlegroups.com>
Message-ID: <1186000119_6209@sp12lax.superfeed.net>


>> > def my_method():
>> >
>> >     # do something
>>
>> >     # how do I get the name of this method 
>> >     # which is my_method here?
>>
>> Why do you need this?  There are ways but those 
>> are not really good for production code.
>>
>
> I am going to use this in Django. I am trying to implement 
> a permission here, where in the database store the methods 
> that the user are allowed to execute. 
>
> for example if the method is  def create_event() :
> the method will look for create_event in the database 
> to see if it allow to be execute.

james .... 

  Perhaps a simple-minded hard-coded solution
  might work .... 

     def permission_check( name ) : 

         permission = DB.permission_check( name )
 
         if not permission : 

             print 'No Execute Permission for %s ' % name

             sys.exit( -1 )

    def my_method() : 

        permission_check( "my_method" )

        ....

   
-- 
Stanley C. Kitching
Human Being
Phoenix, Arizona


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


From grante at visi.com  Fri Aug 24 21:14:33 2007
From: grante at visi.com (Grant Edwards)
Date: Sat, 25 Aug 2007 01:14:33 -0000
Subject: py2exe/distutils: how to include a tree of files?
References: <13cuhdr58m5one7@corp.supernews.com>
	<13cukd39lgsfgb4@corp.supernews.com>
	<1188000252.290854.289870@q4g2000prc.googlegroups.com>
Message-ID: <13cv0jpdot6fo20@corp.supernews.com>

On 2007-08-25, Carl Banks <pavlovevidence at gmail.com> wrote:
> On Aug 24, 5:46 pm, Grant Edwards <gra... at visi.com> wrote:
>> On 2007-08-24, Grant Edwards <gra... at visi.com> wrote:
>>
>> > I'm packaging up a python program and need to include an entire
>> > directory tree in the distribution.
>>
>> I've cobbled together something using package_dir/package_data
>> and  os.path.walk(), but it seems like a bit of a kludge...
>
> "data_files" is documented in the official distutils
> documentation.

It took quite a while, but I eventually found it.  Having the
documentation split up into dozens and dozens of small pages
sure makes it hard to find things. I don't really understand
what the advantage for splitting up documentation into
screen-sized chunks is supposed to be -- all the web browsers
I've ever seen can scroll.  One page per module or chapter
sure would make it easier to search...

> (Yes, in regular distutils you do have to pretty much walk the data
> directories to get your data.)

That's what I ended up doing.  Fortunately os.walk() makes it
fairly easy. :)

-- 
Grant Edwards                   grante             Yow!  Nipples, dimples,
                                  at               knuckles, NICKLES,
                               visi.com            wrinkles, pimples!!


From james.p.news at gmail.com  Wed Aug 22 15:28:19 2007
From: james.p.news at gmail.com (james.p.news at gmail.com)
Date: Wed, 22 Aug 2007 19:28:19 -0000
Subject: libgmail failure
In-Reply-To: <il_yi.1379$JD.695@newssvr21.news.prodigy.net>
References: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
	<il_yi.1379$JD.695@newssvr21.news.prodigy.net>
Message-ID: <1187810899.496022.314240@z24g2000prh.googlegroups.com>

On Aug 22, 10:26 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> james.p.n... at gmail.com wrote:
> > Hey all,
>
> > I've been using libgmail to send out automated notification emails for
> > my company's nightly regression testing.  Last night these emails
> > started failing, though the python code has not changed.  I updated to
> > the latest libgmail, but that isn't helping.  I've logged in to the
> > email account directly, and the account is still working fine.
>
> > The error I get is "HTTP Error 400: Bad Request" when using
> > gmailAccount.login().  This doesn't throw an exception, just prints
> > the error.  The code crashes outright when it tries to send mail.
>
> > This code has been up and running for several months and just started
> > failing last night.  Does anyone have an idea what's going on?
>
> > The code and error follow (fairly short :-)
>
> > Thanks much,
> > James
>
> Have you thought about spoofing explorer? Always spoof explorer.
>
> James


I have not heard of this.  How do you spoof IE in libgmail?

Thanks much,
James



From kbk at shore.net  Sat Aug 18 21:58:40 2007
From: kbk at shore.net (Kurt B. Kaiser)
Date: Sat, 18 Aug 2007 21:58:40 -0400 (EDT)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200708190158.l7J1weEW020776@hampton.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  417 open (+13) /  3855 closed ( +0) /  4272 total (+13)
Bugs    : 1069 open ( +4) /  6800 closed (+10) /  7869 total (+14)
RFE     :  262 open ( -1) /   296 closed ( +1) /   558 total ( +0)

New / Reopened Patches
______________________

Replacing char* with const char*  (2007-08-12)
       http://python.org/sf/1772673  opened by  eXt

[python-mode] Properly highlight lambda with no arguments  (2007-08-12)
       http://python.org/sf/1772721  opened by  Michal Kwiatkowski

-q (quiet) option for python interpreter  (2007-08-13)
       http://python.org/sf/1772833  opened by  Marcin Wojdyr

Decimal and long hash, compatibly and efficiently  (2007-08-13)
       http://python.org/sf/1772851  opened by  Mark Dickinson

Remove references to _xmlrpclib from xmlrpclib.py  (2007-08-14)
       http://python.org/sf/1773632  opened by  Alan McIntyre

Unify __builtins__ -> __builtin__  (2007-08-15)
       http://python.org/sf/1774369  opened by  Christian Heimes

Add Checkbutton get() and set(value)  (2007-08-14)
       http://python.org/sf/1774370  opened by  Graham Horler

Make it possible to use SVK to develop Python  (2007-08-14)
       http://python.org/sf/1774414  opened by  Collin Winter

Override flags set by IOBase in io.StringIO  (2007-08-15)
       http://python.org/sf/1774828  opened by  Alexandre Vassalotti

Convert str to bytes in io.BytesIO.__init__  (2007-08-15)
       http://python.org/sf/1774833  opened by  Alexandre Vassalotti

zipfile: Allow reading duplicate filenames  (2007-08-15)
       http://python.org/sf/1775025  opened by  Graham Horler

utt-32 codecs  (2007-08-16)
       http://python.org/sf/1775604  opened by  Walter D?rwald

Minor corrections to smtplib  (2007-08-17)
       http://python.org/sf/1776581  opened by  Alan McIntyre

New / Reopened Bugs
___________________

urllib2 hangs with some documents.  (2007-08-12)
       http://python.org/sf/1772481  opened by  Creature

dir() on traceback objects returns an empty list  (2007-08-11)
CLOSED http://python.org/sf/1772489  opened by  Collin Winter

exec() doesn't take an open file  (2007-08-12)
CLOSED http://python.org/sf/1772686  opened by  Neal Norwitz

chr(128) in u'only ascii' -> TypeError with misleading msg  (2007-08-13)
       http://python.org/sf/1772788  opened by  Pekka Laukkanen

Using telnetlib fails with unicode strings containing only a  (2007-08-13)
       http://python.org/sf/1772794  opened by  Pekka Laukkanen

Py Lib Ref, 3.6.1 String Methods startswith() typo  (2007-08-13)
CLOSED http://python.org/sf/1772890  opened by  arxaaron

xmlrpclib crash when PyXML installed  (2007-08-13)
       http://python.org/sf/1772916  opened by  lplatypus

Binding <Control-space> fails  (2007-08-15)
       http://python.org/sf/1774736  opened by  Ali Gholami Rudi

Not exiting when running tests  (2007-08-15)
       http://python.org/sf/1774840  opened by  Jos? Pablo "Pupeno" Fern?ndez

Display CallTips for classes using metaclasses.  (2007-08-16)
       http://python.org/sf/1775388  opened by  Noam Raphael

Buffer overflow when listing deeply nested directory  (2007-08-17)
       http://python.org/sf/1776160  opened by  Bj?rn Lindqvist

glob.glob inconsistent  (2007-08-18)
       http://python.org/sf/1776674  opened by  norbidur

tempfile.TemporaryFile differs between platforms  (2007-08-18)
       http://python.org/sf/1776696  opened by  Kenneth Loafman

memoryview('test') is causing a segfault  (2007-08-19)
       http://python.org/sf/1777057  opened by  Christian Heimes

Bugs Closed
___________

ERROR - Microsoft Visual C++ Runtime Library  (2007-05-18)
       http://python.org/sf/1721161  closed by  gbrandl

dir() on traceback objects returns an empty list  (2007-08-11)
       http://python.org/sf/1772489  closed by  collinwinter

words able to decode but unable to encode in GB18030  (2007-08-09)
       http://python.org/sf/1770551  closed by  perky

exec() doesn't take an open file  (2007-08-12)
       http://python.org/sf/1772686  closed by  bcannon

Py Lib Ref, 3.6.1 String Methods startswith() typo  (2007-08-13)
       http://python.org/sf/1772890  closed by  gbrandl

decimal.Decimal("trash") produces informationless exception  (2007-08-08)
       http://python.org/sf/1770009  closed by  facundobatista

mark deprecated modules in indexes  (2003-10-02)
       http://python.org/sf/816725  closed by  gbrandl

Python function/method/constant names as HTML-tag IDs  (2005-07-24)
       http://python.org/sf/1243945  closed by  gbrandl

Collapse distutils docs  (2005-12-07)
       http://python.org/sf/1375258  closed by  gbrandl

some section links (previous, up, next) missing last word  (2006-09-15)
       http://python.org/sf/1559142  closed by  gbrandl

RFE Closed
__________

-q (quiet) option for python interpreter  (2007-05-30)
       http://python.org/sf/1728488  closed by  wojdyr



From jjl at pobox.com  Tue Aug  7 17:38:10 2007
From: jjl at pobox.com (John J. Lee)
Date: Tue, 07 Aug 2007 21:38:10 GMT
Subject: Misleading wikipedia article on Python 3?
References: <87bqdlswbn.fsf@pobox.com>
	<46b611c4$0$24872$9b622d9e@news.freenet.de>
	<877io9soa1.fsf@pobox.com> <46B63F0E.8030208@v.loewis.de>
	<87y7gpr33a.fsf@pobox.com>
	<mailman.1660.1186380664.22759.python-list@python.org>
	<87lkcnoydy.fsf@pobox.com>
	<46b8e0a2$0$12255$9b622d9e@news.freenet.de>
Message-ID: <87d4xzowjh.fsf@pobox.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:

>> Do you *really* think that projects will fall 50-50 into the "yes" and
>> "no" camps, as you seem to imply -- after all, if you thought that one
>> case was more common, why wouldn't you mention which it was?
>
> I know you didn't ask me this time, but I answer anyway: I don't know.
>
> I *really* think that only experience can tell, and that any kind of
> prediction on that matter is futile FUD (as FUD, it might be successful,
> of course). I do so using all my skill and judgment. Only when people
> actually start to try porting, list specific issues that they actually
> ran into (rather than listing issues they anticipate to run into),
> only then I can make guesses as to what the common case will be.
[...]

By this criterion, Guido himself is engaging in FUD, as near as I can
tell (of course, I don't believe he is doing that; I also can't
believe that the effective requirements for the project are quite as
decoupled from source compatibility considerations as has sometimes
been implied by some of those working on the project).


John


From carsten at uniqsys.com  Thu Aug  2 08:28:46 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 02 Aug 2007 08:28:46 -0400
Subject: frequency analysis of a DB column
In-Reply-To: <op.twexqextx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
References: <1186021313.413443.184060@i38g2000prf.googlegroups.com>
	<op.twexqextx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
Message-ID: <1186057726.3388.6.camel@dot.uniqsys.com>

On Thu, 2007-08-02 at 00:38 -0300, Gabriel Genellina wrote:
> I'd start with:
> 
> select column, count(column), min(column), max(column)
>  from table
> group by column
> order by count(column) desc

What's the point of including min(column) and max(column)? They're
always going to be equal to column.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From lionchao at gmail.com  Wed Aug 22 15:34:21 2007
From: lionchao at gmail.com (Eric CHAO)
Date: Wed, 22 Aug 2007 20:34:21 +0100
Subject: way to define static method
Message-ID: <de6dc4a00708221234q63752cc2xc7ac1b64495ae95e@mail.gmail.com>

I think Python uses a very strange way to define static method in a
class. Why not make it like this?

class MyClass:
    def my_static_method(self):
        # self should be None as it's a static method
        # just ignore self

I'm a newcomer so maybe it's quite naive. But I just wonder why it is
designed like this.

Thanks.


From sbellon at sbellon.de  Sat Aug 11 10:04:49 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Sat, 11 Aug 2007 16:04:49 +0200
Subject: Destruction of generator objects
References: <20070808002852.6228ae91@cube.tz.axivion.com>
	<1186613044.494852.306970@q75g2000hsh.googlegroups.com>
	<20070809011441.05d7dfb6@cube.tz.axivion.com>
	<1186819365.988117.232230@g4g2000hsf.googlegroups.com>
	<20070811121630.1b010eab@cube.tz.axivion.com>
	<1186831173.814193.235420@o61g2000hsh.googlegroups.com>
	<20070811140017.22a11f82@cube.tz.axivion.com>
	<1186834823.389706.137980@r34g2000hsd.googlegroups.com>
	<20070811145033.18c70c0c@cube.tz.axivion.com>
	<5i5qheF3ml00gU2@mid.uni-berlin.de>
Message-ID: <20070811160449.2237e3f9@cube.tz.axivion.com>

On Sat, 11 Aug, Marc 'BlackJack' Rintsch wrote:

> On Sat, 11 Aug 2007 14:50:33 +0200, Stefan Bellon wrote:

> > But then, even when terminating the interpreter, __del__ is not
> > called.
> 
> Because that is not guaranteed by the language reference.  The reason
> why it is a bad idea to depend on `__del__` for important resource
> management.

Ok, but then we are back to my initial question of whether the destroy
of

    def get_data(obj):
        iter = make_iter(obj)
        while more(iter):
            yield next(iter)
        destroy(iter)

can be guaranteed somehow in Python 2.4 while it can be done in Python
2.5 like follows:

    def get_data(obj):
        iter = make_iter(obj)
        try:
            while more(iter):
                yield next(iter)
        finally:
            destroy(iter)

And then the answer is: no, it cannot be done in 2.4 (like Alex
Martelli already said ;-)

-- 
Stefan Bellon


From joevans at gmail.com  Sun Aug 26 16:12:30 2007
From: joevans at gmail.com (Jason Evans)
Date: Sun, 26 Aug 2007 13:12:30 -0700
Subject: Parser Generator?
In-Reply-To: <qKudneA2bKtKoFLbnZ2dnUVZ_vKunZ2d@comcast.com>
References: <abKdnVoQMu2o7FrbnZ2dnUVZ_gqdnZ2d@comcast.com>
	<1187834836.115735.111160@e9g2000prf.googlegroups.com>
	<qKudneA2bKtKoFLbnZ2dnUVZ_vKunZ2d@comcast.com>
Message-ID: <1188159150.755231.239390@o80g2000hse.googlegroups.com>

On Aug 24, 1:21 pm, "Jack" <nos... at invalid.com> wrote:
> "Jason Evans" <joev... at gmail.com> wrote in message
> >    http://www.canonware.com/Parsing/
>
> Thanks Jason. Does Parsing.py support Unicode characters (especially CJK)?
> I'll take a look.

Parsers typically deal with tokens rather than individual characters,
so the scanner that creates the tokens is the main thing that Unicode
matters to.  I have written Unicode-aware scanners for use with
Parsing-based parsers, with no problems.  This is pretty easy to do,
since Python has built-in support for Unicode strings.

Jason



From steve at holdenweb.com  Sun Aug 12 22:06:00 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Aug 2007 22:06:00 -0400
Subject: Ligmail bug?
In-Reply-To: <E9171170-9581-42C5-B68F-6F1442433246@leafe.com>
References: <20070812005057.GA15805@ob41.org>
	<f9l3m2$hb0$1@sea.gmane.org>	<20070812182439.GA2427@ob41.org>
	<46BEE9B8.8080904@holdenweb.com>
	<E9171170-9581-42C5-B68F-6F1442433246@leafe.com>
Message-ID: <46BFBC88.2010400@holdenweb.com>

Ed Leafe wrote:
> On Aug 12, 2007, at 7:06 AM, Steve Holden wrote:
> 
>> [Please reply via the list when a response is made via the list.  
>> You may
>> now have detached the follow-ups from your original question, but at
>> least if you use the list there's a chance someone else will help  
>> you if
>> I give up or don't have time. Note I have sent this response to the
>> list; you are Cc'd to make sure you pick it up even though it may not
>> appear in the same thread.]
> 
> 	I've seen others comment on this, so I'll throw in my 2 cents.
> 
> 	The default behavior for this list should be to reply to the list,  
> as you have pointed out. Yet for some unfathomable reason, the  
> keepers of the list have set it up to default to reply to the  
> original sender. This is nothing short of stupid, and I cast my vote  
> (if I even have one) for changing this default to a more intelligent  
> one, if for no other reason than to not have to constantly read  
> comments like this chiding someone for acting in a predictable fashion.
> 
Since I subscribe to the newsgroup rather than to the mailing list I 
don't see that behavior. It's by far the most convenient way to interact 
with c.l.py, and gmane.org makes it easy to do so with Firefox or 
Outlook Express. I've never really understood why Outlook doesn't 
include an NNTP client. I presume Apple Mail (which appears in your 
headers) doesn't act as a newsreader either?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From arkanes at gmail.com  Fri Aug 17 20:30:46 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 17 Aug 2007 19:30:46 -0500
Subject: wxPython in C++ app using wxWidgets
In-Reply-To: <rIidnU2tiqY8vVvbnZ2dnUVZ8ternZ2d@eclipse.net.uk>
References: <rIidnU2tiqY8vVvbnZ2dnUVZ8ternZ2d@eclipse.net.uk>
Message-ID: <4866bea60708171730l1c2a58f9h87ce58bb375642ea@mail.gmail.com>

On 8/17/07, Marcin Kalicinski <kalita at poczta.onet.pl> wrote:
> I have an application written in C++ that uses wxWidgets for GUI. I use
> embedded Python for scripting inside of this application. I want to use
> wxPython to add GUI to my scripts - because my C++ App uses wxWidgets I
> thought it to be easy. The problem is that wxPython knows nothing about
> wxApp/wxFrame objects created in my C++ application, and insists (by giving
> me asserts) that I create another wxApp object for wxPython inside my
> scripts. Obviously, this is not what I want. I want the scripts to use the
> same wxApp/wxFrame object that my C++ application already created. More
> specifically, I want to create dialogs in wxPython that will have my
> application wxFrame as parent.
>
> I'm stuck. Any help appreciated.
>

I've never done this, but there's a sample in the wxPython source
distribution (I don't think it's in the packaged versions). You can
see it in SVN at
http://svn.wxwidgets.org/viewvc/wx/wxPython/trunk/samples/embedded/

If you have questions the sample doesn't answer, or if it doesn't work
for you, ask on the wxpython-users list instead of this one.


From timid.gentoo at gmail.com  Sun Aug 12 22:24:18 2007
From: timid.gentoo at gmail.com (_spitFIRE)
Date: Sun, 12 Aug 2007 21:24:18 -0500
Subject: which IDE is highly recommended in Windows OS
In-Reply-To: <1186970945.403792.51790@d55g2000hsg.googlegroups.com>
References: <1186970945.403792.51790@d55g2000hsg.googlegroups.com>
Message-ID: <f9oert$24k1$1@sxnews1.qg.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Ge Chunyuan wrote:
> hi Group:
> 
> I am a new comer for Python, I wonder which IDE is recommended in
> Windows OS.
> Can anyone give some suggestion.
> 
> 
> Thanks indeed
> Ge Chunyuan
> 

- - Stani's Python Editor
(http://www.softpedia.com/get/Programming/Coding-languages-Compilers/Stanis-Python-Editor.shtml)
- - Black Adder (http://www.thekompany.com/products/blackadder/)
- - Zeus (http://www.zeusedit.com/python.html)
- - PyScripter (http://mmm-experts.com/Products.aspx?ProductId=4)
- - ActivePython (http://www.activestate.com/)
- - IDLE (http://www.python.org/idle/doc/idle2.html)

and depending on how you define IDEs, you can also decide whether or not to
include, the following
- - emacs
- - vim
- - scite
...

- --
_ _ _]{5pitph!r3}[_ _ _
__________________________________________________
?I'm smart enough to know that I'm dumb.?
  - Richard P Feynman
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Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFGv8DSA0th8WKBUJMRAqGcAJ9hhMp3tyS7XmBZT2+fol/A69j4jwCfXNya
xQTmmDlDF5BAfiWkrSW3TuQ=
=902n
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From buzzard at urubu.freeserve.co.uk  Tue Aug 21 14:18:18 2007
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Tue, 21 Aug 2007 19:18:18 +0100
Subject: confused about why i get a type error when i call an object's
	method
In-Reply-To: <1187719631.092657.158410@d55g2000hsg.googlegroups.com>
References: <1187719631.092657.158410@d55g2000hsg.googlegroups.com>
Message-ID: <fafa5r$2300$1@energise.enta.net>

pepper at rumbalski.com wrote:
> I'm confused about why i get a type error when i call an object's
> method.  Here's the example code:
> 
>>>>class Foo:
> 
> 	def __init__(self):
> 		self.foo = []
> 	def foo(self):
> 		print "in foo!"
> 
> 
> 
>>>>f = Foo()
>>>>dir(f)
> 
> ['__doc__', '__init__', '__module__', 'foo']
> 
>>>>f.foo()
> 
> 
> Traceback (most recent call last):
>   File "<pyshell#32>", line 1, in <module>
>     f.foo()
> TypeError: 'list' object is not callable
> 
> 

Because f.foo is a list and you're trying to call it.  You need
different names for the list and the method (both self.foo above).

Duncan


From cncprgr at gmail.com  Fri Aug 31 23:00:48 2007
From: cncprgr at gmail.com (dc)
Date: Fri, 31 Aug 2007 20:00:48 -0700
Subject: Python weather application
In-Reply-To: <1188513685.528316.4770@l22g2000prc.googlegroups.com>
References: <1188503143.724438.309580@x40g2000prg.googlegroups.com>
	<1188513685.528316.4770@l22g2000prc.googlegroups.com>
Message-ID: <1188615648.362001.323770@50g2000hsm.googlegroups.com>

On Aug 30, 5:41 pm, Zentrader <zentrad... at gmail.com> wrote:
> On Aug 30, 12:45 pm, seancron <seanc... at gmail.com> wrote:
>
>
>
> > Does anybody have any suggestions for getting started on desigining a
> > desktop weather application in Python?
>
> > I've been looking for access to weather data and while I have found
> > several including the weather.com service I've decided to use the
> > Yahoo! Rss Weather feed since it doesn't have a license like the
> > weather.com service does. However one problem I have with it is that
> > it only accepts zip codes or locations ids.  So if a user was to enter
> > the name of the city instead of those two there would be an error. I
> > could make it so they could only enter in the location code or zip
> > code but I would really prefer to have it be automatically corrected.
> > Does anyone have ideas on how to go about this or have an other
> > suggestions?
>
> > Thanks,
> > Sean
>
> Use a dictionary to convert from the city chosen to the zip/location
> code to use at Yahoo.

You can purchase/subscribe a zip code database and then use that as a
reverse look-up for your user entering a city. try the postal service
website for the database info.



From arkanes at gmail.com  Thu Aug 30 16:25:46 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 30 Aug 2007 15:25:46 -0500
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188504811.019632.186580@x35g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<1188430887.481586.106760@l22g2000prc.googlegroups.com>
	<mailman.159.1188499976.28954.python-list@python.org>
	<1188504811.019632.186580@x35g2000prf.googlegroups.com>
Message-ID: <4866bea60708301325x2c424bf6yec59a7b304035fab@mail.gmail.com>

On 8/30/07, Russ <uymqlp502 at sneakemail.com> wrote:
>
> > PEP 316 introduces new syntax for a limited use feature. That's pretty
> > much a no-starter, in my opinion, and past experience tends to bear
> > that out. Furthermore, it predates decorators  and context managers,
> > which give all the syntax support you need and let you move the actual
> > DBC features into a library. I can't remember if I mentioned this
> > before but I believe that Philip Ebys PEAK toolkit has some stuff you
> > could use for DBC.
>
> I don't see how you can avoid adding some new syntax, given that
> Python does not
> currently have syntax for specifying invariants and pre- and post-
> conditions. And if I am
> not mistaken, the new syntax would appear only in doc strings, not in
> the regular Python
> code itself. We're not really talking here about changing the core
> Python syntax itself,
> so I don't see it as a "non-starter." Anyone who chooses not to use
> would be completely
> unaffected.
>

I misread the pep as adding the identifiers into the actual python
syntax, not in the docstring. All the more reason to implement it as a
library, then. I actually think that decorators and context managers
would be nicer than special docstring syntax, but I recognize the
benefit of the doctest style approach.

> As far as I can tell, Terence Way has done a nice job of implementing
> design by contract for
> Python, but perhaps a better approach is possible. The advantage of
> making part of the
> core Python distribution is that it would get vetted more thoroughly.
>

Things get vetted *before* they get added to the core, not after.


From Shawn at Milochik.com  Mon Aug 20 11:22:43 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Mon, 20 Aug 2007 11:22:43 -0400
Subject: Newbee Question
In-Reply-To: <1187622390.854759.162320@q3g2000prf.googlegroups.com>
References: <mailman.15.1187620149.26576.python-list@python.org>
	<1187621470.484615.7010@i13g2000prf.googlegroups.com>
	<mailman.19.1187621934.26576.python-list@python.org>
	<1187622390.854759.162320@q3g2000prf.googlegroups.com>
Message-ID: <2dc0c81b0708200822k337c2ad2pe8f0dbc3717365b@mail.gmail.com>

> I like to write code, so it's not a big deal when it's something so
> simple. Still, that is beyond dumb! Nice code, by the way.
>
> Mike

Yeah, it was fun to write anyway. Thanks for the compliment on the
code. I still consider myself a Python newbie, so it's good to know
I'm not trying to write it like Perl or VBScript anymore. ^_^

Shawn


From dstromberg at datallegro.com  Wed Aug 15 19:26:39 2007
From: dstromberg at datallegro.com (Dan Stromberg - Datallegro)
Date: Wed, 15 Aug 2007 16:26:39 -0700
Subject: "Variable variable name" or "variable lvalue"
References: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
Message-ID: <pan.2007.08.15.23.26.39.782477@datallegro.com>

On Wed, 15 Aug 2007 10:42:02 -0700, mfglinux wrote:

> Hello to everybody
> 
> I would like to know how to declare in python a "variable name" that
> it is in turn a variable
> In bash shell I would wrote sthg like:
> 
> for x in `seq 1 3`
> do
>   M$i=Material(x)  #Material is a python class
> done
> 
> Why I need this? Cause I have a python module that obliges me to build
> a variable called Period, which should have a variable name of
> summands (depends on the value of x)
> 
> #Let's say x=3, then Period definition is
> Period=Slab(Material1(12.5)+Material2(25)+Material3(12.5)) #Slab is a
> python class
> 
> I dont know how to automatize last piece of code for any x
> 
> thank you
> 
> Marcos

It sounds to me like you want python's "eval", based on my
understanding of how that bash code should work.  It's not that different
from eval in bash, though in python you'd need it; in bash you don't in
this case.

So you could probably do something like (untested):

for x in xrange(1,4):
	eval 'M%d=Material(x)' % x




From ghirai at ghirai.com  Tue Aug 14 14:10:43 2007
From: ghirai at ghirai.com (Ghirai)
Date: Tue, 14 Aug 2007 21:10:43 +0300
Subject: curses library
Message-ID: <20070814211043.286b8aa6.ghirai@ghirai.com>

Hello list,

I need to write a console application.

Are there any wrappers around curses/ncurses?
Or any other similar libraries?

Thanks.
-- 
Regards,
Ghirai.


From semanticist at gmail.com  Fri Aug 17 11:53:07 2007
From: semanticist at gmail.com (Miles)
Date: Fri, 17 Aug 2007 11:53:07 -0400
Subject: Getting the result of a process after exec*()
In-Reply-To: <1187361196.184025.234020@k79g2000hse.googlegroups.com>
References: <1187361196.184025.234020@k79g2000hse.googlegroups.com>
Message-ID: <a49e45f50708170853h4f44277fl6b06307dc8aba81a@mail.gmail.com>

On 8/17/07, AndrewTK <atkedzierski at gmail.com> wrote:
> The problem for me is this: once an external process is called via
> exec*() the script has effectively fulfilled its task. Is there any
> way one can process a file with an external process and continue
> further processing in Python; /once the external processing is
> completed/?

Assuming you're looking at the docs for the os module, instead of the
exec*() functions, check out the spawn*() functions, or, to use a
subshell, system().  Better yet, take a look at the subprocess module:
http://docs.python.org/lib/module-subprocess.html

-Miles


From thushianthan15 at gmail.com  Wed Aug 22 12:13:37 2007
From: thushianthan15 at gmail.com (thushianthan15 at gmail.com)
Date: Wed, 22 Aug 2007 09:13:37 -0700
Subject: Python for web development ...
Message-ID: <1187799217.054726.109380@z24g2000prh.googlegroups.com>


Hi everyone,

I have to do a web based application for my final year project. Since,
i am only familiar with basic HTML and Java Script, i am totally new
to this one. My friends are using LAMP (P->PHP). But i want to use
Python. Is it possible to use Python with Apache and MySQL. Is it
possible ? Any websites/books ?

Thank you



From chris.hulan at gmail.com  Tue Aug 28 08:41:26 2007
From: chris.hulan at gmail.com (ChrisHulan)
Date: Tue, 28 Aug 2007 12:41:26 -0000
Subject: Biased random?
In-Reply-To: <favd0c$fcu$1@ss408.t-com.hr>
References: <favd0c$fcu$1@ss408.t-com.hr>
Message-ID: <1188304886.108882.74000@57g2000hsv.googlegroups.com>

On Aug 27, 4:42 pm, Ivan Voras <ivoras at __fer.hr__> wrote:
> Hi,
>
> I have a list of items, and need to choose several elements from it,
> "almost random". The catch is that the elements from the beginning
> should have more chance of being selected than those at the end (how
> much more? I don't care how the "envelope" of probability looks like at
> this point - can be linear). I see that there are several functions in
> Python standard libraries for various distribution, but is there an easy
> pythonic way to make them do what I need?

Not sure how pythonic it is...but a simple(?) way to increase the
chances for particular
elements is to introduce copies. For example given [1,2,3], you can
increase the chances
of selecting '1' by changing the list to [1,1,2,3].

Cheers
Chris



From rdm at rcblue.com  Sun Aug 12 20:01:19 2007
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 12 Aug 2007 17:01:19 -0700
Subject: A dumb question about a class
In-Reply-To: <euCdnYM4sfSHFiLbnZ2dnUVZ_gadnZ2d@comcast.com>
References: <mailman.1887.1186955369.22759.python-list@python.org>
	<TqSdnWYzVdWvGCLbnZ2dnUVZ_saknZ2d@comcast.com>
	<mailman.1888.1186957809.22759.python-list@python.org>
	<euCdnYM4sfSHFiLbnZ2dnUVZ_gadnZ2d@comcast.com>
Message-ID: <20070813000128.F00771E400B@bag.python.org>

At 03:35 PM 8/12/2007, Steven Bethard wrote:
>Note that if you just want to iterate over all the primes, there's no
>need for the class at all.  Simply write::
>
>      for prime in iter_primes():

Even if I want to test only 1 integer, or want the list of primes in 
a certain interval, I don't need the class at all:

====================================
import itertools

def iter_primes():
     # an iterator of all numbers between 2 and +infinity
     numbers = itertools.count(2)


     # generate primes forever
     while True:


         # get the first number from the iterator (always a prime)
         prime = numbers.next()
         yield prime


         # remove all numbers from the (infinite) iterator that are
         # divisible by the prime we just generated
         numbers = itertools.ifilter(prime.__rmod__, numbers)

def listPrimes(n,m):
     """
     Returns the list of primes in closed interval [n,m]
     """
     primes = []
     for prime in iter_primes():
         if prime > m:
             return primes
         if n <= prime <= m:
             primes.append(prime)
============================================

Thanks for your help. I didn't learn much about classes, but 
appreciated your iter_primes() a lot!

Dick Moores 



From gnewsg at gmail.com  Tue Aug 28 21:21:12 2007
From: gnewsg at gmail.com (billiejoex)
Date: Tue, 28 Aug 2007 18:21:12 -0700
Subject: tempfile.mkstemp and os.fdopen
In-Reply-To: <slrnfd90i1.rol.nick@irishsea.home.craig-wood.com>
References: <1188323759.955043.317630@19g2000hsx.googlegroups.com>
	<slrnfd90i1.rol.nick@irishsea.home.craig-wood.com>
Message-ID: <1188350472.508625.18780@50g2000hsm.googlegroups.com>

Thanks all.
Another question: I have to open file for writing ('wb') but I noticed
that both tempfile.mkstemp() and os.fdopen() accept a "mode" argument.
It's not clear *when* do I have to specify such mode. When using
tempfile.mkstemp?

>>> fileno, name = tempfile.mkstemp(text=False)
>>> fd = os.fdopen(fileno)

...or when using os.fdopen()?

>>> fileno, name = tempfile.mkstemp()
>>> fd = os.fdopen(fileno, mode='wb')

Moreover, what happens if I specify "text" mode when using mkstemp and
"binary" mode when using fdopen?

>>> fileno, name = tempfile.mkstemp(text=True)
>>> fd = os.fdopen(fileno, 'wb')


PS - I think that tempfile.mkstemp docstring should be enhanced to
cover such and other questions (e.g. I find reasonable that every user
using tempfile.mkstemp() should use also os.fdopen() in conjunction
but this isn't mentioned).



From tooru_honda at fast-mail.org  Sat Aug 25 23:30:45 2007
From: tooru_honda at fast-mail.org (tooru honda)
Date: Sun, 26 Aug 2007 11:30:45 +0800
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
Message-ID: <tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>

By incorporating Alex's code, I got another performance boost of 20%.  
It is mostly due to Alex's more efficient implementation of block random 
than my own version.

-tooru honda

Below is the code I have now:


from binascii import hexlify
from os import urandom

class rcRandomC(random.SystemRandom):

    def __init__(self):
        random.SystemRandom.__init__(self)

        def rand2():
            
            while True:
                randata = urandom(2*1024)
                for i in xrange(0, 2*1024, 2):
                    yield int(hexlify(randata[i:i+2]),16)    # integer 
in [0,65535]
                    
        self.rand2_M = rand2().next 


    # modified from random._randbelow
    def randrange(self,startN,stopN):

        """Choose a random integer from range(startN, stopN).
        widthN<=65536

        """

        widthN=stopN-startN


        left_over_N=65536%widthN
        upper_bound_N= 65535-left_over_N

        random_number=self.rand2_M()

        while random_number>upper_bound_N:

            random_number=self.rand2_M()

        r = random_number%widthN        
   
        return startN+r

    def shuffle(self, x):
        """x, random=random.random -> shuffle list x in place; return 
None.

        """

        randrange=self.randrange

        for i in reversed(xrange(1, len(x))):
            # pick an element in x[:i+1] with which to exchange x[i]
            j = randrange(0,i+1)
            x[i], x[j] = x[j], x[i]


From ehsan.khoddam at gmail.com  Fri Aug  3 14:48:40 2007
From: ehsan.khoddam at gmail.com (Ehsan)
Date: Fri, 03 Aug 2007 11:48:40 -0700
Subject: downloading files
Message-ID: <1186166920.757662.269340@o61g2000hsh.googlegroups.com>

I foundd this code in ASPN  Python Cookbook for downloading files in
python but when it finished downloading files the files became
corrupted and didn't open, the files in internet havn't any problem:


def download(url,fileName):
	"""Copy the contents of a file from a given URL
	to a local file.
	"""
	import urllib
	webFile = urllib.urlopen(url)
	localFile = open(fileName, 'w')
	localFile.write(webFile.read())
	webFile.close()
	localFile.close()
download('http://www.2shared.com/download/1839752/cd520048/
xpersia14.3gp?tsid=20070803-143313-49566ea2', 'xpersia4.3gp' )



From jon at turnthepage.org  Tue Aug  7 16:55:35 2007
From: jon at turnthepage.org (Jon Rosebaugh)
Date: Tue, 7 Aug 2007 15:55:35 -0500
Subject: Web based Reporting tool for Python
References: <1186460956.945148.162610@k79g2000hse.googlegroups.com>
Message-ID: <2007080715553575249-jon@turnthepageorg>

On 2007-08-06 23:29:16 -0500, Madhu Alagu <almadhu at gmail.com> said:

> Hi
> I am looking template based report tools for python.It has the ability
> to deliver rich content onto the screen, to the printer or into PDF,
> HTML, XLS, CSV and XML files.

I don't think this has been implemented in Python because it's a pretty 
boring thing to do, and things like JasperReports (in Java) and Crystal 
Reports already have the market pretty well tied up. What my company 
did was to use JasperReports via a web service we set up.



From tenax.raccoon at gmail.com  Sun Aug 19 12:40:46 2007
From: tenax.raccoon at gmail.com (Jason)
Date: Sun, 19 Aug 2007 16:40:46 -0000
Subject: How to setup pyOpenGL3.0.a6 for window xp?
In-Reply-To: <1187397743.937458.301590@q3g2000prf.googlegroups.com>
References: <1187395670.267971.88750@q4g2000prc.googlegroups.com>
	<1187397743.937458.301590@q3g2000prf.googlegroups.com>
Message-ID: <1187541646.185788.15310@k79g2000hse.googlegroups.com>

On Aug 17, 6:42 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> Windows comes with OpenGL libraries.  However, before you can use
> OpenGL you'll need a package that can provide an OpenGL context, which
> PyOpenGL doesn't do (easily).
>
> PyGame is the typical choice for most uses.  If all you need is a
> simple window to draw on, this is the package you want.
>
> However, it doesn't (easily) work with common GUIs like GTK and Wx.
> If you want to use use OpenGL in a GUI app, then you'll want to find
> an "OpenGL canvas widget" for that GUI.
>
> Carl Banks

Sorry Carl, but I'm a bit confused with your third paragraph.  Do you
mean that PyGame doesn't work easily with Wx/GTK, or that OpenGL
doesn't work easily with Wx/GTK?

If it's the second, then I must disagree.  wxPython comes with an
OpenGL widget in the "wx.glcanvas" module.  The widget only requires
PyOpenGL.  The wxPython Demo shows how to set up and program the
widget quite easily.  Another example is at: "http://
aspn.activestate.com/ASPN/Cookbook/Python/Recipe/325392".

Unfortunately, I don't have much experience with PyGTK.  Their FAQ
does indicate that you need an extension to add OpenGL support.

  --Jason



From jarausch at igpm.rwth-aachen.de  Wed Aug  1 03:41:52 2007
From: jarausch at igpm.rwth-aachen.de (Helmut Jarausch)
Date: Wed, 01 Aug 2007 09:41:52 +0200
Subject: split a string of space separated substrings - elegant solution?
In-Reply-To: <1185941803.577841.178550@l70g2000hse.googlegroups.com>
References: <46af9beb$0$14242$ba620e4c@news.skynet.be>
	<1185941803.577841.178550@l70g2000hse.googlegroups.com>
Message-ID: <46B03940.8020105@igpm.rwth-aachen.de>

Many thanks to all of you!
It's amazing how many elegant solutions there are in Python.


-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From knjaz0 at gmail.com  Tue Aug 14 17:47:07 2007
From: knjaz0 at gmail.com (knjaz)
Date: Tue, 14 Aug 2007 14:47:07 -0700
Subject: Air conditioners for cars
Message-ID: <1187128027.172562.125190@g4g2000hsf.googlegroups.com>

Everything you need to know about car air conditioners...

http://car-air-conditioning.blogspot.com/



From mikael at isy.liu.se  Wed Aug 15 12:44:30 2007
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Wed, 15 Aug 2007 18:44:30 +0200
Subject: Combinatorial of elements in Python?
In-Reply-To: <9e2f512b0708150651g7a9834cdm2db874d84804e362@mail.gmail.com>
References: <9e2f512b0708142203m782b0e10s817fb4d061ba0e46@mail.gmail.com>	
	<46C2F538.8000900@isy.liu.se>
	<9e2f512b0708150651g7a9834cdm2db874d84804e362@mail.gmail.com>
Message-ID: <46C32D6E.7070804@isy.liu.se>



Sebastian Bassi wrote:
> Hello, could you do it for an indefinite number of elements? You did
> it for a fixed (2) number of elements. I wonder if this could be done
> for all members in a dictionary.

What is unclear here is in what order the keys should be visited. The 
following assumes that the keys should be considered in alphanumeric order.

 >>> def combine(d):
    if not d:
        return []
    elif len(d)==1:
        return d.values()[0]
    else:
        keys = d.keys()
        keys.sort()
        leftKeys = keys[0:len(keys)//2]
        rightKeys = keys[len(keys)//2:]
        leftDict = dict((key,d[key]) for key in leftKeys)
        rightDict = dict((key,d[key]) for key in rightKeys)
        return [x+y for x in combine(leftDict) for y in combine(rightDict)]

   
 >>> 
A={'field1':['a','A'],'field2':['b','B'],'field3':['c','C'],'field4':['d','D']}
 >>> combine(A)
['abcd', 'abcD', 'abCd', 'abCD', 'aBcd', 'aBcD', 'aBCd', 'aBCD', 'Abcd', 
'AbcD', 'AbCd', 'AbCD', 'ABcd', 'ABcD', 'ABCd', 'ABCD']


HTH again
/MiO


From steve at holdenweb.com  Sun Aug 12 13:54:13 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Aug 2007 13:54:13 -0400
Subject: Regular Expression Grouping
In-Reply-To: <1186939262.144073.182450@z24g2000prh.googlegroups.com>
References: <1186939262.144073.182450@z24g2000prh.googlegroups.com>
Message-ID: <f9nhg3$h1v$1@sea.gmane.org>

linnewbie at gmail.com wrote:
> Fairly new to this regex thing, so this might be very juvenile but
> important.
> 
> I cannot understand and why 'c' constitutes a group here without being
> surrounded by "(" ,")" ?
> 
>>>> import re
>>>> m = re.match("([abc])+", "abc")
>>>> m.groups()
> ('c',)
> 
> Grateful for any clarity.
> 
What's happening there is that the same group is being used three times 
to complete the match, but a group can only be represented once in the 
output, so you are seeing the last substring that the group matched. 
Contrast with:

 >>> m = re.match("([abc]+)", 'abc')
 >>> m.groups()
('abc',)
 >>>

I don't *think* there's any way to introduce a variable number of groups 
into your match, but I don't use re's that much so someone may be able 
to help if that's what you want. Is it?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bdesth.quelquechose at free.quelquepart.fr  Thu Aug 30 06:54:10 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 30 Aug 2007 12:54:10 +0200
Subject: Pivy problem and some other stuff
In-Reply-To: <1188501707.593319.23330@m37g2000prh.googlegroups.com>
References: <1188501707.593319.23330@m37g2000prh.googlegroups.com>
Message-ID: <46d73fde$0$421$426a74cc@news.free.fr>

azrael a ?crit :
> Hy Guys
> 
> Did anyone manage to install and use Pivy. I'm trying it and cant come
> closer to the goal I get the message:
> Please set the COIN3DDIR environment variable to your Coin root
> directory! ** Aborting **
> 
> Familiar to anyone?
> 
I don't even know what Pivy is, but it obviously wants you to set an 
environment variable (how you do so depends on your environment - on 
most linux distros, and AFAIK on most unix systems, it's usually done in 
your ~/.bash_profile file) named COIN3DIR and pointing to a directory !-)




From gherzig at fmed.uba.ar  Thu Aug 16 16:16:23 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Thu, 16 Aug 2007 17:16:23 -0300
Subject: advice about `correct' use of decorator
Message-ID: <46C4B097.4080309@fmed.uba.ar>

Hi all. I guess i have a conceptual question:
Im planing using a quite simple decorator to be used as a conditional 
for the execution of the function. I mean something like that:

@is_logued_in
def change_pass():
    bla
    bla

And so on for all the other functions who needs that the user is still 
loged in.

where obviosly the is_logued_in() function will determine if the dude is 
still loged in, and THEN execute change_pass(). If the dude is not loged 
in, change_pass() is NOT executed at all. Instead, it will be redirected 
to the `login' screen.

Something in my mind tells me that this is not the pythonic way...But i 
like the idea, so please tell me that im in the right way :)

Cheers.
Gerardo




From no_mail at someprovider.it  Thu Aug 30 05:19:45 2007
From: no_mail at someprovider.it (lupino)
Date: Thu, 30 Aug 2007 11:19:45 +0200
Subject: Python doesn't see the directories I create
References: <ldvBi.293202$LE1.92748@newsfe13.lga>
Message-ID: <20070830111945.58edf6a4@localhost>

Ciao mr_gadget,

> When I create a subfolder, python is not seeing it. Can someone please 
> explain this behaviour ? I just started with python, read the tutorial over 
> the weekend and am writing my very first script. So I may not be seeing 
> something. Both os.path and glob.glob seem not to see a folder I created. 
> Other sibling folders seem to work fine. On a whim I tried paths with \\ 
> double slashes and that worked. But why should single slashes work for some 
> folders and not for others ??

Instead of relying on your own error-prone ability of using forward and back
slashes as path separators, try to get as much as possible from python. ;)

You can use os.sep as a cross-platform path separator, instead of forward
slashes or escaped back slashes.

Moreover you can use the os.path.join function to let python take care of your
problem. :)

>>> os.path.join("C:", "Programs", "MySubFolder")
'C:/Programs/MySubFolder'

HTH,

-- 
[ Andrea Spadaccini - a.k.a. lupino3 - GLUGCT - from Catania - ICQ : 91528290 ]
[ GPG ID: 5D41ABF0 - key on keyservers - Debian GNU / Linux - Kernel 2.6.18.4 ]
[ Linux Registered User 313388 - a(dot)spadaccini(at)catania(dot)linux(dot)it ]
[       Computers are high-speed idiots, programmed by low-speed idiots       ]


From steve at holdenweb.com  Thu Aug  9 09:17:08 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Aug 2007 09:17:08 -0400
Subject: check if regeular expression has results
In-Reply-To: <1186664302.050036.302670@g4g2000hsf.googlegroups.com>
References: <1186664302.050036.302670@g4g2000hsf.googlegroups.com>
Message-ID: <f9f44h$npj$1@sea.gmane.org>

shahargs at gmail.com wrote:
> Hi,
> I'm looking for the best way to check if regular expression return
> true (it's mean - there is a match). for example, i want "if" that
> check if this regular expression: .*born.*to.* has a match.
> 
> What's the way to do that simply?
> 

A failed match returns None. A successful match returns a match object. 
So the easiest way to check for a successful match is

pat = re.compile(...)
     ....
m = pat.match(some_string)
if m:
     ... you got a match ...
else:
     ... you didn't ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From digitalplusmail at gmail.com  Wed Aug 15 10:28:46 2007
From: digitalplusmail at gmail.com (Lepi Duja)
Date: Wed, 15 Aug 2007 14:28:46 -0000
Subject: Free Air Conditioners!!!!!
Message-ID: <1187188126.751546.129520@w3g2000hsg.googlegroups.com>

Air conditioning

http://airconditionerslinks.blogspot.com/



From gagsl-py2 at yahoo.com.ar  Sun Aug 19 14:40:45 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 19 Aug 2007 11:40:45 -0700
Subject: ctypes and unsigned char*
In-Reply-To: <1187545486.797017.308720@a39g2000hsc.googlegroups.com>
References: <1187545486.797017.308720@a39g2000hsc.googlegroups.com>
Message-ID: <1187548845.674582.69630@w3g2000hsg.googlegroups.com>

On 19 ago, 14:44, "oliver.andr... at gmail.com"
<oliver.andr... at gmail.com> wrote:
> Hi,
>
> can anybody with ctypes experience tell me, how to handle a C function
> that returns an unsigned char*? Obviously it is not a restype of
> c_char_p.

Being signed or unsigned is not important here. But you have to
disambiguate "returns an unsigned char*"
- the function returns a string of bytes (unsigned char), null-
terminated.
- the function returns a pointer to a single byte.

In the first case, use a plain c_char_p - the individual "chars" are
already unsigned in Python (that is, ord(xxx[i]) is always positive)
In the second case, first define the pointer type:

c_ubyte_p = POINTER(c_ubyte)
your_function.restype = c_ubyte_p

--
Gabriel Genellina



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Aug 13 16:15:19 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 13 Aug 2007 22:15:19 +0200
Subject: wxPython - drawing without paint event
References: <1186710391.148396.113490@d30g2000prg.googlegroups.com>
	<1186738813.373909.96230@x35g2000prf.googlegroups.com>
	<1186796567.331348.42450@q3g2000prf.googlegroups.com>
	<5i5l0dF2lortaU1@mid.individual.net>
	<1186883988.585048.16590@m37g2000prh.googlegroups.com>
	<5i8befF3o5no1U1@mid.individual.net>
	<1186928595.014008.61950@b79g2000hse.googlegroups.com>
	<5i98bsF3nmbavU1@mid.individual.net>
	<1186951326.218981.17820@b79g2000hse.googlegroups.com>
	<mailman.1885.1186953122.22759.python-list@python.org>
	<1186966731.768800.81620@x40g2000prg.googlegroups.com>
Message-ID: <5ibsenF3nq29uU2@mid.individual.net>

 kyosohma at gmail.com wrote:

> While the book does have issues, it is better (in my opinion) than
> the only published Tkinter book, although both books are now
> outdated. 

Outdated to a certain limit. It's quite a bit more recent than those
many tutorials around still today using 
"from wxpython.wx import *".

> As with all programming, if you don't practice, you won't learn.

True.

Regards,


Bj?rn

-- 
BOFH excuse #103:

operators on strike due to broken coffee machine



From rcdailey at gmail.com  Mon Aug 20 15:49:01 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 20 Aug 2007 14:49:01 -0500
Subject: str().join() isn't working
In-Reply-To: <1187634895.387910.179500@m37g2000prh.googlegroups.com>
References: <496954360708200905i2100b32ag5983ab729e5d216f@mail.gmail.com>
	<mailman.4.1187633821.32294.python-list@python.org>
	<1187634895.387910.179500@m37g2000prh.googlegroups.com>
Message-ID: <496954360708201249y1db0aa14qf0de14538fb51b9d@mail.gmail.com>

Hi all,

Thanks for your response. I figured out the issue. I was using
list.append() to append another list, when I should have been using
expand(). Sorry for the confusion.

On 8/20/07, kyosohma at gmail.com <kyosohma at gmail.com> wrote:
> On Aug 20, 1:16 pm, "Robert Dailey" <rcdai... at gmail.com> wrote:
> > here is a more realized example of the lists I'm trying to join:
> >
> > _user_includes = [
> >         "../src",
> >         "../resource",
> >         "../inc",
> >         "../src",
> >         "../data",
> >         "../gui",
> >         "../script",
> >         "../script/actions",
> >         "../gui/dispatch",
> >         "../gui/factories",
> >         "../gui/frames",
> >         "../gui/getters",
> >         "../gui/localization",
> >         "../gui/player",
> >         "../gui/setters",
> >         "../gui/utilities",
> >         "../sis",
> >         "../player",
> >         "../platform/ngi",
> >         "../../engine",
> >         "../../engine/audio/NGI",
> >         "../../engine/io",
> >         "../../engine/io\NGI",
> >         "../../engine/math",
> >         "../../engine/math/fixed",
> >         "../../engine/path/NGI",
> >         "../../engine/text/NGI",
> >         "../../engine/mem",
> >         "../../engine/text",
> >         "../../engine/observer",
> >         "../../sdk/tiny_xml",
> >         "../../sdk/zlib",
> >         "../../sdk/lpng",
> >         "../../sdk/IFDLib/Source/Precompile",
> >         "../../sdk/IFDLib/Source/CoreLib",
> >         "../../sdk/IFDLib/inc",
> >         "../../sdk/IFDLib/Source/UtilLib",
> >         "../../sdk/IFDLib/Source/GameLib",
> >         "../../sdk/IFDlib/Source/OSLib/_NGI",
> >         "../../sdk/stl-port/NGI",
> >         "../../sdk/mini-boost/NGI",
> >         "../../sdk/mini-boost/COMMON",
> >         ]
> >
> > _system_includes = [
> >         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include",
> >         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include/osextensions/rga",
> >         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include/osextensions/stdapis",
> >         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/EPOC32/include/osextensions/stdapis/stlport",
> >         "../../../../../../Symbian/9.1/NGAGE_SDK_1.1/epoc32/include/variant"
> >         ]
> >
> > On 8/20/07, Robert Dailey <rcdai... at gmail.com> wrote:
> >
> > > Hi,
> >
> > > First have a look at the following code:
> >
> > > In main.py:
> > > -----------------------------------------------------------------------------------
> > >     space = " "
> >
> > >     includes = space.join ( system._user_includes ) + " " + space.join(
> > > system._system_includes )
> >
> > > In system.py:
> > > -----------------------------------------------------------------------------------
> > > _user_includes = [
> > >     ]
> >
> > > _system_includes = [
> > >     ]
> >
> > > The above does not work. The interpreter states: "TypeError: sequence item
> > > 0: expected string, list found". I'm not sure what this means. Can anyone
> > > help me figure out what I'm doing wrong? Thanks.
> >
> > > PS: I've also tried putting strings in the lists above just to make sure
> > > that them being empty wasn't the problem. I got no different results.
>
> When you use join, you join the items in the list with each other to
> form one long string. In your statement, your script tries to
> concatenate 2 lists to each other before it does the join, which is
> impossible in Python. The "+" operator is only for addition and for
> two or more strings.
>
> See http://www.faqs.org/docs/diveintopython/odbchelper_join.html for
> more information on joins.
>
> Mike
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From CarpeSkium at gmail.com  Thu Aug  2 06:43:21 2007
From: CarpeSkium at gmail.com (CarpeSkium at gmail.com)
Date: Thu, 02 Aug 2007 10:43:21 -0000
Subject: Use variable in regular expression
Message-ID: <1186051401.122847.114690@d55g2000hsg.googlegroups.com>

I know I can use a variable in regular expressions. I want to use a
regex to find something based on the beginning of the string. I am
using yesterday's date to find all of my data from yesterday.
Yesterday's date is 20070731, and assigned to the variable
"yesterday_date". I want to loop thru a directory and find all of the
yesterday's data ONLY IF the feature class has the date at the
BEGINNING of the filename.

Sample strings:
20070731_test1
Copy20070731_test1
20070731_test2
Copy20070731_test2
20070731_test3
Copy20070731_test3

I don't want the one's that start with "Copy". I can't figure out the
syntax of inserting the "^" into the regex. I've tried all of the
following, with no luck:

re.compile(^yesterday_date)
re.compile(r'^yesterday_date')
re.compile(r'^[yesterday_date]')
re.compile(r'[^yesterday_date]')

I don't know what I'm doing and I'm just guessing at this point. Can
anyone help? Thanks.

Mark



From larry.bates at websafe.com  Tue Aug 14 08:06:06 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 14 Aug 2007 07:06:06 -0500
Subject: Drawing a graph
In-Reply-To: <mailman.1917.1187012829.22759.python-list@python.org>
References: <mailman.1917.1187012829.22759.python-list@python.org>
Message-ID: <46C19AAE.4010009@websafe.com>

Ghirai wrote:
> Hello list,
> 
> I need to draw a graph, 2 axes, 2D, nothing fancy.
> One of the axes is time, the other one is a series of integers.
> 
> I don't care much about the output format.
> 
> Are there any specialized libraries for this, or should i use PIL?
> 
> Thanks.
> 
ReportLab graphics works for me.

www.reportlab.org

-Larry


From hg at nospam.org  Sun Aug 26 18:47:26 2007
From: hg at nospam.org (hg)
Date: Sun, 26 Aug 2007 22:47:26 GMT
Subject: ANN: SCF released GPL
Message-ID: <2qnAi.21495$eY.19028@newssvr13.news.prodigy.net>

Dear all,

I am releasing much of my work including SCF (Cross platform Smart Card 
library & Tools written in Python) to the GPL license.

If interested, go to http://www.SnakeCard.com/Source.html

I am moving the doc to doxygen and cleaning up the code, so what you'll 
see there will change in the course of the next few weeks - basically 
can only get meaningful info on the classes hierarchy at this stage.
I am looking for a free subversion server resource to put the code ... 
if you know of any.

Some of the work there will be windows-only related (GINA, activeX 
components ... and not coded in Python) and the applets JavaCard and 
BasicCard ... I'm releasing these during the next few days.

Regards,

hg


From zyzhu2000 at gmail.com  Mon Aug 20 13:50:49 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Mon, 20 Aug 2007 17:50:49 -0000
Subject: 'REPL' style IDE
Message-ID: <1187632249.748945.158910@i13g2000prf.googlegroups.com>

Hi Everyone,

I am using the Wing IDE. It works great when developing applications,
but the workflow is like Visual Studio -- after you execute it or
debug it, the python script ends.

What I want is an interactive interpreting environment. I want the IDE
to execute a boot script to initialize my environment and create some
basic data objects. And then I want to be able to type in command on
the command line using these objects. The IDLE that comes with Python
does this, but compared with Wing, it does not have a lot of the
convenient features.

I am wondering if there is anything more powerful than IDLE that can
do this.

Thanks,
Geoffrey



From bj_666 at gmx.net  Thu Aug 16 02:34:38 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 16 Aug 2007 06:34:38 GMT
Subject: replacement for string.printable
References: <mailman.2026.1187204186.22759.python-list@python.org>
	<5ih0vlF3mc1akU2@mid.uni-berlin.de>
	<mailman.2038.1187216127.22759.python-list@python.org>
Message-ID: <5ii9ftF3pp59iU1@mid.uni-berlin.de>

On Wed, 15 Aug 2007 23:15:12 +0100, John K Masters wrote:

> help('string')
> 
> DESCRIPTION
> Warning: most of the code you see here isn't normally used nowadays.
> Beginning with Python 1.6, many of these functions are
> implemented as methods on the standard string object. They used to be
> implemented by a built-in module called strop, but strop is now
> obsolete itself.
> 
> <quote> Beginning with Python 1.6 </quote>
> 
> We are now way past 1.6. Are you sure the string module is still being
> added to?

The `string.Template` class was added in Python?2.4:

  http://docs.python.org/lib/node40.html

Ciao,
	Marc 'BlackJack' Rintsch


From conra2004 at yahoo.com  Tue Aug 14 03:27:46 2007
From: conra2004 at yahoo.com (yadin)
Date: Tue, 14 Aug 2007 00:27:46 -0700
Subject: about negative polar plots
Message-ID: <1187076466.955318.249250@57g2000hsv.googlegroups.com>

hi am doing a polar plot of the radiation pattern of an antenna.
the polar plots represents the value of the power in dB's and the dB
go from -40dB to 0dB
as the angle theta changes from 0 to 2*pi rads
the polar plot in python goes with positive values
how can i solve this problem
rough example
example:
power = arange(-40,0,-10)
theta = arange(0, 2pi,pi/12)
polar(power,theta)
title.....?
how can i show the step on the polar plot  plot(-40, -30,-20,-10,0)



From bronger at physik.rwth-aachen.de  Fri Aug 24 06:59:28 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 24 Aug 2007 12:59:28 +0200
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com> <87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com> <87tzqp77my.fsf@wilson.homeunix.com>
	<7xy7g1if24.fsf@ruckus.brouhaha.com>
	<87mywh717i.fsf@wilson.homeunix.com>
	<mailman.240.1187950454.32294.python-list@python.org>
Message-ID: <878x816vvz.fsf@wilson.homeunix.com>

Hall?chen!

Wildemar Wildenburger writes:

> [...]
> 
>> Well, because they are awful.  ;-)  I don't see that there is a
>> bunch of already existing projects, in fact, I don't see anyone
>> challenging LaTeX at all.  However, competition is a good thing,
>> and I think there are enough aspects about LaTeX that can be done
>> better so that this project is worth being done.
>  
> Well there is ConTeXt <URL:http://wiki.contextgarden.net/>. I've
> never actually used it, but from reading the docs I deem it a very
> attractive alternative to LaTeX.

That's right, I failed to mention ConTeXt, which really is a
competitor to LaTeX.  I even took one good idea from context, namely
the availability of syntax elements in different human languages.

However, ConTeXt documents are as much cluttered as LaTeX.  ConTeXt
is a huge system with the aim of fine control on the PDF layout.
Therefore, it is even harder to convert it to HTML than it is for
LaTeX.  Besides, I never managed to comprehend its documentation.

It has its good aspects, too, but these are the reasons why I don't
think that it would be a good starting point for improving the
situation with plain text document markup languages.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From pavlovevidence at gmail.com  Fri Aug 24 20:04:12 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 24 Aug 2007 17:04:12 -0700
Subject: py2exe/distutils: how to include a tree of files?
In-Reply-To: <13cukd39lgsfgb4@corp.supernews.com>
References: <13cuhdr58m5one7@corp.supernews.com>
	<13cukd39lgsfgb4@corp.supernews.com>
Message-ID: <1188000252.290854.289870@q4g2000prc.googlegroups.com>

On Aug 24, 5:46 pm, Grant Edwards <gra... at visi.com> wrote:
> On 2007-08-24, Grant Edwards <gra... at visi.com> wrote:
>
> > I'm packaging up a python program and need to include an entire
> > directory tree in the distribution.
>
> I've cobbled together something using package_dir/package_data
> and  os.path.walk(), but it seems like a bit of a kludge...

"data_files" is documented in the official distutils documentation.
(Yes, in regular distutils you do have to pretty much walk the data
directories to get your data.)

I guess the idea was that you would use the same setup.py for
building, installing, and packaging (source and py2exe).  But it
doesn't work all that well in practice, because using "data_files" is
rather useless for non-py2exe packaging since you could never be sure
where distutils actually installed the data files.  (You could only
guess, based on the location of the script files, and even that was
shaky because of a bug if the user installed it with --prefix.)

The packages I use all seem to avoid this difficulty by placing data
in the package directories, alongside the py files.

I suppose because "data_files" wasn't too helpful, there was never
much incentive to improve it.  Which (getting back to py2exe) is
unfortunate since you CAN rely on the location when using py2exe, but
it is stuck with the unwieldy usage.  Oh well.


Carl Banks



From NO_Kroeger at gmx.de  Wed Aug 22 14:06:28 2007
From: NO_Kroeger at gmx.de (=?ISO-8859-1?Q?Nils_Oliver_Kr=F6ger?=)
Date: Wed, 22 Aug 2007 20:06:28 +0200
Subject: Threads and racing conditions
In-Reply-To: <5fb10ac20708212126j70f8100bka66fe5e3661904cc@mail.gmail.com>
References: <5fb10ac20708212126j70f8100bka66fe5e3661904cc@mail.gmail.com>
Message-ID: <46CC7B24.5090103@gmx.de>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Flavio Preto schrieb:
> Hi,
> 
> I have a doubt. Supose that i have the minimun class below:
> 
> class db:
>     def __init__(self):
>         self.db = {}
>     def read(self, key):
>         return self.db[key]
>     def write(self, key, value):
>         self.db[key] = value
> 
> 
> and an object of this class is shared among some threads. Is it possible
> that in a read, the method return a value that is not an old or a new value?
> In other words, is it possible that a 'read' return (due to a 'write' at the
> same time by another thread) an invalid value that was never supposed to be
> there?
> 
> Thanks,
> Flavio Preto
> 
>

Make the class thread safe by using Lock or RLock ... that will save you
a lot of trouble.
Your limited example might or might not work, but once your class gets
more complex you will most likely run into serious problems.

Greetings

Nils
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From mail at microcorp.co.za  Fri Aug  3 02:38:18 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 3 Aug 2007 08:38:18 +0200
Subject: i am new to python-Please somebody help
References: <1186047103.673871.150460@z24g2000prh.googlegroups.com><1186063842.827016.95030@q3g2000prf.googlegroups.com><mailman.1520.1186073909.22759.python-list@python.org>
	<1186081737.357371.232040@i13g2000prf.googlegroups.com>
Message-ID: <00fa01c7d59b$9672c6a0$03000080@hendrik>


 "gregarican" <greg.....il.com> wrote:

> Maybe it's just me but the word "grovelling" just doesn't ring of
> newbie friendliness. To each their own I guess. Kind of like the
> Smalltalk list where a few respondents are really dry. Someone will
> post asking something like "Can I use Smalltalk to do X so that it
> talks to Y?" One guy (without pointing to a link or offering a
> snippet) just posts "Yes." I guess literally they have contributed. Or
> someone calls your house and asks, "Is so-and-so there?" You just say
> "Yes" and hang up on them :-)

Or at table  - "Can you pass the salt?"

"Yes"

< a brief hiatus, laden with unfulfilled expectations and no action >

"Please pass me the salt"

"Certainly - there you are."

On the subject of "grovelling" - this refusal to tug, and to condone
tugging at forelocks, may be a Southern Hemisphere affliction.

Don't like it myself.

- Hendrik



From siona at chiark.greenend.org.uk  Thu Aug  2 07:44:56 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 02 Aug 2007 12:44:56 +0100 (BST)
Subject: Use variable in regular expression
References: <1186051401.122847.114690@d55g2000hsg.googlegroups.com>
Message-ID: <4Ym*UdhRr@news.chiark.greenend.org.uk>

 <CarpeSkium at gmail.com> wrote:
>I know I can use a variable in regular expressions. I want to use a
>regex to find something based on the beginning of the string.

You're coming from a Perl background, right? No-one else would
think of using a regexp for such a simple thing. There are two
things you need to learn:

(a) Python doesn't do automatic variable interpolation in strings.
(b) For simple find and replace operations, there are string
    methods which are easier and faster than regexps.

>Yesterday's date is 20070731, and assigned to the variable
>"yesterday_date". I want to loop thru a directory and find all of the
>yesterday's data ONLY IF the feature class has the date at the
>BEGINNING of the filename.
>
>Sample strings:
>20070731_test1
>Copy20070731_test1
>20070731_test2
>Copy20070731_test2
>20070731_test3
>Copy20070731_test3
>
>I don't want the one's that start with "Copy".

>>> "20070731_test1".startswith(yesterday_date)
True
>>> "Copy20070731_test1".startswith(yesterday_date)
False

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
   "Frankly I have no feelings towards penguins one way or the other"
        -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From ca.allen at gmail.com  Mon Aug 20 17:47:56 2007
From: ca.allen at gmail.com (Chris Allen)
Date: Mon, 20 Aug 2007 14:47:56 -0700
Subject: Newbie question about a web server
In-Reply-To: <1187593367.402094.235410@g4g2000hsf.googlegroups.com>
References: <1187593367.402094.235410@g4g2000hsf.googlegroups.com>
Message-ID: <1187646476.945061.169110@r23g2000prd.googlegroups.com>

On Aug 20, 12:02 am, Frank Millman <fr... at chagford.com> wrote:
> Hi all
>
> I have just started to dabble in writing my own web server.
>
> I googled for 'python web server', and this is the first hit -
>
>    http://fragments.turtlemeat.com/pythonwebserver.php
>
> It has the source code for a simple web server, based on HTTPServer
> and BaseHTTPRequestHandler.
>
> It demonstrates the concepts of
>   - returning a static page
>   - constructing and returning a dynamic page
>   - sending a form with a POST method, and responding to the result
>
> I typed it in and ran it, and it 'just worked', with one exception.
>
> When responding to the initial request, it sends a 200 response,
> followed by a content-type header, followed by an html page. This
> works fine.
>
> When responding to the POST data received, it sends a 301 response, no
> headers, and then the html page.
>
> This works with a Firefox browser on Linux, but MSW IE6 displays 'the
> page cannot be displayed'.
>
> According to the notes, "You don't have to know much about the HTTP
> protocol at all. Except some basic that when the client request
> something it is a "GET", and when the client sends something it is in
> our case a POST. Some basic responce codes like 200 is OK for GET, and
> 404 is file not found, 301 is OK for a Post."
>
> I googled for 'http response code 301', and found that it is actually
> a redirection code. It seems that the notes are misleading.
>
> So I guess my questions are -
>   1. what is the correct response for a POST?
>      I think the answer is 200.
>      However, I assume the author is trying to demonstrate a
> particular technique.
>      Can anyone explain what that may be.
>   2. why does the above work with Firefox?
>
> TIA for any enlightenment.
>
> Frank Millman


Yes HTTP response code 200 does indicate a normal response.  What you
really need to look at to build an HTTP server is is the RFC for
HTTP.  It is HTTP 1.1 is RFC 2616 and you can view it here:
http://www.faqs.org/rfcs/rfc2616.html

That should get you on your way...





From rrs at researchut.com  Tue Aug 14 23:14:04 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Wed, 15 Aug 2007 08:44:04 +0530
Subject: Module imports during object instantiation
References: <4c3vo4-u7k.ln1@learner.hq.netapp.com> <f9pcuj$6n4$1@sea.gmane.org>
	<mailman.1931.1187030415.22759.python-list@python.org>
	<46c16ec9$0$405$426a34cc@news.free.fr>
	<mailman.1956.1187091452.22759.python-list@python.org>
	<slrnfc36p9.21o.horpner@FIAD06.norwich.edu>
	<mailman.1965.1187101832.22759.python-list@python.org>
	<slrnfc3gg4.1l4.horpner@FIAD06.norwich.edu>
Message-ID: <sk7ap4-dn8.ln1@learner.hq.netapp.com>

Neil Cerutti wrote:

>>
>> Doesn't __init__ get called automatically ?
> 
> It gets called automatically when you construct an instance of
> the class in which it's defined.

I am a little confused by your statements now.

In my earlier posts in the same thread, I gave some code example which was
something like this:

class Log:
        def __init__():
                if os.name == 'posix':
                        try:
                                import foobar
                        except ImportError, e:
                                print >> sys.stderr, e

(Sorry for the bad indentation)

Now, what do you mean here by "construct an instance of the class in which
it is defined" ?

__init__() _is_ defined in the Log class and I try to create an instance of
the class Log as:

log = Log()

Assuming it is run on a box which is POSIX compliant, the try/import should
fail and I should see an error message because there is no module named
foobar. But I don't see that. And this is what exactly I wanted to get
clarified in this whole thread. (But still haven't got a clear answer to a
Yes/No).

Or am I terribly missing something that you are trying to tell ?

Ritesh
-- 
If possible, Please CC me when replying. I'm not subscribed to the list.



From mccredie at gmail.com  Tue Aug 28 20:25:15 2007
From: mccredie at gmail.com (Matimus)
Date: Wed, 29 Aug 2007 00:25:15 -0000
Subject: Pythonic way of reading a textfile line by line without throwing
	an exception
In-Reply-To: <XNmdnVFJkZRMK0nbnZ2dnUVZ_s7inZ2d@comcast.com>
References: <1ab7b8470708281647g59e685ect371f20aaea30b070@mail.gmail.com>
	<mailman.90.1188344955.28954.python-list@python.org>
	<XNmdnVFJkZRMK0nbnZ2dnUVZ_s7inZ2d@comcast.com>
Message-ID: <1188347115.998206.111790@z24g2000prh.googlegroups.com>

> fp=open(filename, 'r')
> for line in fp:
>     # do something with line
>
> fp.close()

Or, if you are using Python 2.5+, you can use the file context via the
`with' statement.

[code]
from __future__ import with_statement # this line won't be needed in
Python 2.6+

with open(filename, 'r') as fp:
    for line in fp:
        # do something with line
[/code]

This basicly just closes the file automatically (even if there is an
exception) when the context (part indented under `with') is exited.
This is a new feature, but probably the most pythonic way of doing it.
That will be especially true in the future.

Matt



From dstromberg at datallegro.com  Thu Aug 23 12:48:53 2007
From: dstromberg at datallegro.com (Dan Stromberg - Datallegro)
Date: Thu, 23 Aug 2007 09:48:53 -0700
Subject: Socket recv(1) seems to block instead of returning end of file.
References: <mailman.164.1187862959.32294.python-list@python.org>
Message-ID: <pan.2007.08.23.16.48.52.958428@datallegro.com>

On Thu, 23 Aug 2007 11:54:01 +0200, Hendrik van Rooyen wrote:

> 
> While doing a netstring implementation I noticed that if you
> build a record up using socket's recv(1), then when you close
> the remote end down, the recv(1) hangs, despite having a short
> time out of  0.1 set.
> 
> If however, you try to receive more than one char, (I tested with 3,
> did not try 2), then when you shut the remote end down you do not
> get a time out, but an empty string - the normal end of file, I suppose.
> 
> Has anybody else seen this behaviour?
> 
> The transmit side seems to give a broken pipe error, which is fine.
> 
> I am using stock standard SuSe 10, Python 2.4, out of the box.
> 
> - Hendrik

Are you using sock.settimeout()?

I've always done timed-out sockets in python using select; IINM, the
settimeout method is a new addition.

I agree with Grant though - posting a minimal snippet of code that
replicates the problem would help us help you.  In fact, it might help you
help yourself :)




From steve at holdenweb.com  Tue Aug  7 02:39:05 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Aug 2007 02:39:05 -0400
Subject: read(size=-1)
In-Reply-To: <1186466817.747723.87910@19g2000hsx.googlegroups.com>
References: <1186466817.747723.87910@19g2000hsx.googlegroups.com>
Message-ID: <f99428$bi4$2@sea.gmane.org>

7stud wrote:
> Suppose I write:
> 
> f = open("myimg.jpg")
> f.read(10)
> 
> 
> According to the docs,
> -----------
> read([size])
> 
> Read at most size bytes from the file....The bytes are returned as a
> string object.
> ----------
> 
> How does python convert a byte to a string?
> 
Each byte of the file occupies one character in the string. As you could 
have found out (more quickly than posting!) by actually typing your 
example into an interpreter.

 >>> f = open('desktop01-real.jpg')
 >>> f.read(10)
'\xff\xd8\xff\xe0\x00\x10JFIF'
 >>>

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bdesth.quelquechose at free.quelquepart.fr  Wed Aug 22 01:48:18 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 22 Aug 2007 07:48:18 +0200
Subject: How to replace a method in an instance.
In-Reply-To: <1187971953.261328.219000@q3g2000prf.googlegroups.com>
References: <mailman.258.1187971369.32294.python-list@python.org>
	<1187971953.261328.219000@q3g2000prf.googlegroups.com>
Message-ID: <46cf2ba2$0$30562$426a74cc@news.free.fr>

kyosohma at gmail.com a ?crit :
> On Aug 24, 11:02 am, "Steven W. Orr" <ste... at syslang.net> wrote:
> 
>>In the program below, I want this instance to end up calling repmeth
>>whenever inst.m1 is called. As it is now, I get this error:
>>
>>Hello from init
>>inst =  <__main__.CC instance at 0x402105ec>
>>Traceback (most recent call last):
>>   File "./foo9.py", line 17, in ?
>>     inst.m1()
>>TypeError: repmeth() takes exactly 1 argument (0 given)
>>
>>#! /usr/bin/python
>>def repmeth( self ):
>>     print "repmeth"
>>
>>class CC:
>>     def __init__( self ):
>>         self.m1 = repmeth
>>         print 'Hello from init'
>>
>>     def m1 ( self ):
>>         print "m1"
>>
>>inst = CC()
>>inst.m1()
>>
>>TIA
>>
> 
> Remove "self" from repmeth as it's not required in a function, only in
> functions that are defined within a class.

Obviously wrong. 'self' (or whatever-you-name-it) as first arg is 
mandatory for functions used as instance methods. The fact that a 
function is defined outside a class doesn't mean it cannot be used as a 
method...

> Of course, a function in a
> class is also know as a method.

Less obvious but still wrong !-)

A function object, whereever (and however) it's defined, is a function 
object, not a method objet. Now what happens is that functions defined 
inside a class are wrapped in method (by default, instancemethod) objects.

To be more accurate - and talking only about how it works for new-style 
classes - function objects implements the descriptor protocol, so when a 
function is a class attribute (which is what happens when the function 
is defined in the class statement's body), and is looked up on an 
instance, it returns an instancemethod object that has the instance and 
the function as attributes. This instancemethod object is itself 
callable, and when called returns the result of calling the function 
with the instance as first argument. classmethods and staticmethods are 
variants fo this scheme, calling the function with either the class as 
first arg (for classmethods) or just as-is (for staticmethods).

Now when you set a function as an *instance* (not class) attribute, the 
descriptor protocol isn't invoked (it only works on class attributes), 
so if you want to use the function as a method, you have to do the 
wrapping by yourself (cf my other answer to the OP).

HTH


From steve at holdenweb.com  Sun Aug 12 21:59:32 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Aug 2007 21:59:32 -0400
Subject: Hex editor - Python beginner's code open to review
In-Reply-To: <1186967504.796928.264650@l22g2000prc.googlegroups.com>
References: <f9jasr021hs@news1.newsguy.com>
	<1186967504.796928.264650@l22g2000prc.googlegroups.com>
Message-ID: <f9odu0$lsr$1@sea.gmane.org>

kyosohma at gmail.com wrote:
> On Aug 10, 10:36 pm, CC <cr... at BOGUS.sbcglobal.net> wrote:
>> Hi:
>>
>> http://web.newsguy.com/crcarl/python/hexl.py
>>
>> This is my first Python program other than tutorial code snippet
>> experimentation.  I chose a hex line editor.  I may do a hex screen
>> editor once this is done, if I feel like playing with the curses module.
>>   Or move straight to wxPython.
>>
>> This is unfinished, and is really just a hex viewer at this point.  It
>> seems like a good point to stop and see what others think.  I would be
>> interested to hear any comments.
>>
>> My command parsing if of course crude, brute-force, and not very
>> scalable.  I am doing some reading on this subject, and will be trying
>> to do a more generalized approach in the next revision.  This is going
>> to be a subject where I need to learn a lot, because I have 2-3
>> embedded applications in C that need varying levels of command parsers,
>> so I will be seeking to improve this skill considerably.
>>
>> Thanks for input.
>>
>> --
>> _____________________
>> Christopher R. Carlen
>> cr... at bogus-remove-me.sbcglobal.net
>> SuSE 9.1 Linux 2.6.5
> 
> Looks like mostly clean code to me. I don't understand why you declare
> "Offset" globally twice. Wouldn't it make more sense to just stick it
> at the top of the file like your "Hexdigits" variable? I'm also not
> sure if your style follows the style guide...then again, mine probably
> doesn't either. You can check it out here though:
> 
> http://www.python.org/doc/essays/styleguide.html
> 
Nowadays the standard for Python style is PEP 8, which represents an 
update on the above.

     http://www.python.org/dev/peps/pep-0008/

> Rather than using if/else statements for error checking, you may want
> to consider using try/except:
> 
> http://docs.python.org/tut/node10.html
> 
> That my 2?!
> 
"if" statements are best if the errors are predictable, "try/except"for 
the less predictable ones, or when it would be difficult to ensure 
correct program flow with "if".

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bj_666 at gmx.net  Tue Aug  7 12:43:21 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Aug 2007 16:43:21 GMT
Subject: Adding a list of descriptors to a class
References: <1186503932.110835.293640@x40g2000prg.googlegroups.com>
Message-ID: <5hrlp9F3ldifeU6@mid.uni-berlin.de>

On Tue, 07 Aug 2007 09:25:32 -0700, Bob B. wrote:

> Ok, that "exec" is an ugly hack.  There's gotta be someway to plop
> this straight into the class's __dict__ without doing that, but when I
> try adding self.__class__.__dict__[attr] = MyDesc(attr) in MyClass's
> __init__ method, I get the error: "TypeError: 'dictproxy' object does
> not support item assignment"

Does ``setattr(self.__class__, attr, MyDesc(attr))`` work?

Ciao,
	Marc 'BlackJack' Rintsch


From nytrokiss at gmail.com  Mon Aug 13 12:49:49 2007
From: nytrokiss at gmail.com (James Matthews)
Date: Mon, 13 Aug 2007 09:49:49 -0700
Subject: which IDE is highly recommended in Windows OS
In-Reply-To: <1186993664.769976.109710@r34g2000hsd.googlegroups.com>
References: <1186970945.403792.51790@d55g2000hsg.googlegroups.com>
	<f9oert$24k1$1@sxnews1.qg.com>
	<1186993664.769976.109710@r34g2000hsd.googlegroups.com>
Message-ID: <8a6b8e350708130949o4482471ax9f12fca866f00b70@mail.gmail.com>

www.wingide.com

On 8/13/07, Ge Chunyuan <hhygcy at gmail.com> wrote:
>
> On Aug 13, 10:24 am, _spitFIRE <timid.gen... at gmail.com> wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > Ge Chunyuan wrote:
> > > hi Group:
> >
> > > I am a new comer for Python, I wonder which IDE is recommended in
> > > Windows OS.
> > > Can anyone give some suggestion.
> >
> > > Thanks indeed
> > > Ge Chunyuan
> >
> > - - Stani's Python Editor
> > (
> http://www.softpedia.com/get/Programming/Coding-languages-Compilers/S...)
> > - - Black Adder (http://www.thekompany.com/products/blackadder/)
> > - - Zeus (http://www.zeusedit.com/python.html)
> > - - PyScripter (http://mmm-experts.com/Products.aspx?ProductId=4)
> > - - ActivePython (http://www.activestate.com/)
> > - - IDLE (http://www.python.org/idle/doc/idle2.html)
> >
> > and depending on how you define IDEs, you can also decide whether or not
> to
> > include, the following
> > - - emacs
> > - - vim
> > - - scite
> > ...
> >
> > - --
> > _ _ _]{5pitph!r3}[_ _ _
> > __________________________________________________
> > "I'm smart enough to know that I'm dumb."
> >   - Richard P Feynman
> > -----BEGIN PGP SIGNATURE-----
> > Version: GnuPG v1.4.6 (GNU/Linux)
> > Comment: Using GnuPG with Mozilla -http://enigmail.mozdev.org
> >
> > iD8DBQFGv8DSA0th8WKBUJMRAqGcAJ9hhMp3tyS7XmBZT2+fol/A69j4jwCfXNya
> > xQTmmDlDF5BAfiWkrSW3TuQ=
> > =902n
> > -----END PGP SIGNATURE-----
>
> thanks buddy, I am now using ActivePython, actually it is beyond my
> expectation:)
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.goldwatches.com/
http://www.jewelerslounge.com
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From half.italian at gmail.com  Fri Aug 31 17:02:01 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: Fri, 31 Aug 2007 21:02:01 -0000
Subject: Is there a simple way to exit a while loop on keystroke?
In-Reply-To: <1188583918.747640.300850@22g2000hsm.googlegroups.com>
References: <1188578827.809840.90100@r29g2000hsg.googlegroups.com>
	<1188581623.588967.78050@z24g2000prh.googlegroups.com>
	<1188583918.747640.300850@22g2000hsm.googlegroups.com>
Message-ID: <1188594121.992051.47790@e9g2000prf.googlegroups.com>

On Aug 31, 11:11 am, gsxg <rha... at gmail.com> wrote:
> Thanks,
> The curses library doesn't look to helpful to me.  However using CTRL-
> C is fine and is working nicely.
>
> BTW, it should be "time.sleep(1)" in the example above, instead of
> just
> "sleep(1)"  (Just in case any other newbies like me read this)
>
> Thanks again

Depends on how you import 'time'

import time
time.sleep(1)

from time import sleep
sleep(1)

~Sean



From ycoci3000 at gmail.com  Tue Aug 14 02:05:23 2007
From: ycoci3000 at gmail.com (Brisingman)
Date: Tue, 14 Aug 2007 06:05:23 -0000
Subject: IDLE path browser not  recognizing my  PYTHONPATH
Message-ID: <1187071523.150365.125590@x40g2000prg.googlegroups.com>

Hi,

I set PYTHONPATH to /home/me/bin in bash.bashrc, however the IDLE path
browser is not recognizing this.  Not sure why.

Grateful for any insight.

Best



From aahz at pythoncraft.com  Sat Aug 11 09:32:42 2007
From: aahz at pythoncraft.com (Aahz)
Date: 11 Aug 2007 06:32:42 -0700
Subject: Augmented assignment (was Re: Something in the function tutorial
	confused me.)
References: <1186383024.384152.87480@l70g2000hse.googlegroups.com>
	<mailman.1751.1186588156.22759.python-list@python.org>
	<slrnfbk19 <m3hvi.37606$G23.6240@newsreading01.news.tds.net>
Message-ID: <f9kdpq$drp$1@panix3.panix.com>

In article <m3hvi.37606$G23.6240 at newsreading01.news.tds.net>,
Neil Cerutti  <horpner at yahoo.com> wrote:
>On 2007-08-11, Alex Martelli <aleax at mac.com> wrote:
>> Neil Cerutti <horpner at yahoo.com> wrote:
>>    ...
>>> The Python Language Reference seems a little confused about the
>>> terminology.
>>> 
>>>   3.4.7 Emulating numeric types
>>>   6.3.1 Augmented assignment statements
>>> 
>>> The former refers to "augmented arithmetic operations", which I
>>> think is a nice terminology, since assignment is not necessarily
>>> taking place. Then the latter muddies the waters.
>>
>> Assignment *IS* "necessarily taking place"; if you try the augmented
>> assignment on something that DOESN'T support assignment, you'll get an
>> exception.  Consider:
>>
>>>>> tup=([],)
>>>>> tup[0] += ['zap']
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>> TypeError: 'tuple' object does not support item assignment
>>
>> Tuples don't support item ASSIGNMENT, and += is an ASSIGNMENT,
>> so tuples don't allow a += on any of their items.
>>
>> If you thought that += wasn't an assignment, this behavior and
>> error message would be very problematic; since the language
>> reference ISN'T confused and has things quite right, this
>> behavior and error message are perfectly consistent and clear.
>
>Thanks for the correction. I was under the illusion that sometimes
>augmented assignment would instead mutate the object.

Although Alex is essentially correct, the situation is a bit more complex
and you are correct that augmented assignment allows the object to decide
whether to mutate in place.  However, the critical part of Alex's point
is what you need to focus on: it's the *tuple* in Alex's example that
intercepts the assignment call, not the list contained in the tuple.

Obviously, you can easily work around it:

>>> t = ([],)
>>> l = t[0]
>>> l += ['foo']
>>> t
(['foo'],)

And this proves that you are correct about the list getting mutated in
place and reflected back in the tuple.  Generally speaking, augmented
assignment with nested container objects is a Bad Idea IMO -- split out
the bits you want to work with.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"And if that makes me an elitist...I couldn't be happier."  --JMS


From mobilendd at gmail.com  Sun Aug 19 13:34:58 2007
From: mobilendd at gmail.com (mobilendd at gmail.com)
Date: Sun, 19 Aug 2007 17:34:58 -0000
Subject: Latest models of Gibson guitars
Message-ID: <1187544898.289948.322160@22g2000hsm.googlegroups.com>

Reviews of latest models of best guitars, fender, gibson, yamaha, and
many more, with pictures and prices.

http://pro-guitars.blogspot.com/


And if you want to win a free guitar go here

http://freeguitars.blogspot.com/



From sdeibel at gmail.com  Thu Aug  2 11:00:40 2007
From: sdeibel at gmail.com (sdeibel at gmail.com)
Date: Thu, 02 Aug 2007 08:00:40 -0700
Subject: Wing IDE for Python v. 3.0 beta1 released
In-Reply-To: <mailman.1494.1186045510.22759.python-list@python.org>
References: <46AF8ED7.2070206@wingware.com>
	<20070801212840.GA25065@spookie1.spookiegate>
	<f8quug$m7j$1@sea.gmane.org>
	<496954360708011453h2a68dee4x48dcb15bb25ea717@mail.gmail.com>
	<f8r0du$qhn$1@sea.gmane.org> <f8r147$rvm$1@sea.gmane.org>
	<mailman.1494.1186045510.22759.python-list@python.org>
Message-ID: <1186066840.011817.327080@x35g2000prf.googlegroups.com>

On Aug 1, 6:42 pm, John K Masters <johnmast... at oxtedonline.net> wrote:
> To suggest that, because the autocompletion worked on one method of a
> module and not on another was because I had not configured the
> PYTHONPATH properly is at least insulting.

We certainly didn't intend to be insulting.  This it the most common
cause of
auto-completion problems but you are right that it's a mis-diagnosis
on our
part if it was just one method.  We respond to sometimes hundreds of
emails
a day ,so we do make mistakes.

It may be solved by using Reanalyze File from the right-click context
menu
on the editor but there's no gaurantee.  This is incredibly complex
code with
many layers of highly optimized tokenizing, analysis, inference,
caching,
and then display in the various tools in Wing so it often takes a bit
more time
to find where the bug is.

By the way, Wing 3.0 beta1 fixes a number of bugs that would lead to
bad analysis, including missing methods as a result of failure to
track edits in a file properly.  It also improves reading completion
info
out of extension modules and properly handles several forms of
import where it fell on its face previously.

Hope that's useful... please let me know if not.

- Stephan



From eduardo.padoan at gmail.com  Fri Aug 24 12:26:09 2007
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Fri, 24 Aug 2007 13:26:09 -0300
Subject: List Comprehension Question: One to Many Mapping?
In-Reply-To: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
References: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
Message-ID: <dea92f560708240926w6150d820mae43d185e93eb4db@mail.gmail.com>

> For example, if I have x=[ [1,2], [3,4] ]
>
> What I want is a new list of list that has four sub-lists:
>
> [[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]]

[[a, [f(b) for b in a]] for a in x]


From robert.kern at gmail.com  Thu Aug 30 20:57:06 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 30 Aug 2007 19:57:06 -0500
Subject: strings (dollar.cents) into floats
In-Reply-To: <46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
References: <mailman.140.1188483282.28954.python-list@python.org>	<877incd20i.fsf@benfinney.id.au>
	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <fb7p17$2t1$1@sea.gmane.org>

Wildemar Wildenburger wrote:
> Ben Finney wrote:
>> You most likely do *not* want floating-point numbers for currency,
>> since they rely on the operating system's binary floating point
>> support which cannot accurately represent decimal fractions.
> 
> I've heard (ok, read) that several times now and I understand the 
> argument. But what use is there for floats, then? When is it OK to use them?

There are many, many situations where one is *not* trying to represent numbers
that have nice decimal fractions or the error induced is insignificant to the
problem. For example, I might take temperature readings good to 0.1 degrees
Celcius. I'll type those numbers in decimal even though when I do my
calculations I'll use floating point math because the error (about 1e-15 or so)
is so far below the error in my measurement (about 0.1) that I won't have problems.

Binary floating point has the advantage of being widely implemented and quite
fast compared to decimal floating point.

-- 
Robert Kern

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



From alexandre.badez at gmail.com  Wed Aug 29 11:50:18 2007
From: alexandre.badez at gmail.com (Alexandre Badez)
Date: Wed, 29 Aug 2007 15:50:18 -0000
Subject: What's the difference ?
In-Reply-To: <1i3ljrn.nrie0r1227d9jN%aleax@mac.com>
References: <1188394767.333396.129020@r29g2000hsg.googlegroups.com>
	<1i3ljrn.nrie0r1227d9jN%aleax@mac.com>
Message-ID: <1188402618.499201.273400@50g2000hsm.googlegroups.com>

Thanks for all you information.

I'll continue to use 'in' instead of 'has_key' for a "faster, more
concise, & readable" code (^L^ )



From stefan.behnel-n05pAM at web.de  Fri Aug  3 07:23:26 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 03 Aug 2007 13:23:26 +0200
Subject: How to read information from tables in HTML?
In-Reply-To: <f8v4gd$qfa$1@news.cn99.com>
References: <f8v4gd$qfa$1@news.cn99.com>
Message-ID: <46B3102E.10001@web.de>

ZelluX wrote:
> I'm confronted with some trouble when dealing with html files.
> 
> The html files contain javascript and some information stored in tables.
> And it seems that they're not well-formed, when parsed with minidom, it
> will say "mismatched tag".

minidom deals with XML. You're trying to read something that's (similar to)
HTML. HTML is much less strict.


> Then how can i get information from those files? Is there any useful
> library for me?

BeautifulSoup or lxml.html (which supports the BeautifulSoup parser, btw).

Both can deal with broken HTML, but lxml.html has better support for cleaning
up HTML (e.g. removing Javascript or embedded content, etc.) or handling forms.

http://codespeak.net/lxml/

The lxml.html package is not currently in an official lxml release, but you
can install it from SVN sources:

http://codespeak.net/svn/lxml/branch/html/

A release is expected soon.

Stefan


From carsten at uniqsys.com  Sat Aug  4 12:14:35 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Sat, 04 Aug 2007 12:14:35 -0400
Subject: Problems with headers in email.message
In-Reply-To: <1186241903.509471.26460@d55g2000hsg.googlegroups.com>
References: <1186241903.509471.26460@d55g2000hsg.googlegroups.com>
Message-ID: <1186244075.3385.12.camel@dot.uniqsys.com>

On Sat, 2007-08-04 at 15:38 +0000, Slippy wrote:
> [...]
> import smtplib, email
> from email.message import Message
> m = Message( )
> m['From'] = 'Slippy <user at myemail.com>'
> m['To'] = 'mygroup at googlegroups.com'
> m['Subject'] = 'A Test Message'
> m.set_payload('This is a test email. Please ignore')
> s = smtplib.SMTP('smtp.myemail.com')
> failed =
> s.sendmail('user at myemail.com','mygroup at googlegroups.com',str(m))
> if failed:
>  print 'Message sending failed.'
> else:
>  print 'Message sent.'
> print 'Bye.'
> -------------Snip Here-------------Snip Here-------------Snip
> Here-------------
> 
> Now, I get all the right responses, and the message sends ok. I go and
> check my inbox, and the message is there, but the From, To and Subject
> lines I created (as well as a preceding blank line and a "From nobody"
> line) are in the message body, followed by the body text.
> 
> How do I assign values to the header?

The way you're doing it is fine as far as assigning headers goes. My
semi-educated guess is that either your mail-transfer agent or Google
Groups' MTA is being confused by the "Unix From" envelope (that's the
"From nobody..." you're seeing) that is included by str(m).

Try m.as_string() instead, which doesn't include the Unix From envelope.

I'd also like to point out that email.message is overkill for your
simple use case. An email message is simply a series of headers followed
by a blank line followed by the message body, which you can easily build
manually if the headers aren't too long and the body is plain text:

email_message = """\
From: %s
To: %s
Subject: %s

%s""" % (email_from, email_to, email_subject, email_body)

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From martin at v.loewis.de  Mon Aug  6 02:30:43 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 06 Aug 2007 08:30:43 +0200
Subject: Setting default output encoding
In-Reply-To: <871wehky9z.fsf@wilson.homeunix.com>
References: <871wehky9z.fsf@wilson.homeunix.com>
Message-ID: <46B6C013.8080000@v.loewis.de>

>     python = subprocess.Popen(["python", "myscript.py"],
>                               stdout=subprocess.PIPE, stderr=subprocess.PIPE)
> 
> However, this child script has sys.stdout.encoding set to None,
> which means that Unicode strings cannot be printed without trouble.

The automatic setting of .encoding is only done when the output is a
terminal. If you write to a file, or a pipe, Python's guess as to what
the encoding of that stream is might be easily wrong.

If you want to be able to write Unicode strings to stdout always,
it's best to wrap stdout with the result of codecs.getwriter. If
you want to use the user's locale as the encoding, use
locale.getpreferredencoding().

Regards,
Martin


From bj_666 at gmx.net  Thu Aug 30 03:08:19 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 Aug 2007 07:08:19 GMT
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
Message-ID: <5jn8n3FdmbcU1@mid.uni-berlin.de>

On Wed, 29 Aug 2007 23:44:33 -0700, zzbbaadd wrote:

> What's with the index() function of lists throwing an exception on not
> found? Let's hope this is rectified in Python 3. If nothing else, add
> a function that doesn't throw an exception. There are a million
> situations where you can have an item not be in a list and it is not
> an exception situation.

Write such a function yourself, it is quite easy after all.  I very seldom
use the `list.index()` method.  What do your millions situations look like?
Maybe there is a better data structure than lists for those situations!?

Ciao,
	Marc 'BlackJack' Rintsch


From aboudouvas at panafonet.gr  Fri Aug 10 06:49:36 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Fri, 10 Aug 2007 03:49:36 -0700
Subject: Question about properties.
In-Reply-To: <1186742730.729034.256800@i13g2000prf.googlegroups.com>
References: <1186741289.074717.174370@e16g2000pri.googlegroups.com>
	<5i2t7dF3kqc46U3@mid.uni-berlin.de>
	<1186742730.729034.256800@i13g2000prf.googlegroups.com>
Message-ID: <1186742976.758800.102090@q3g2000prf.googlegroups.com>

Maybe is just a writers' "play" and nothing else.



From Graham.Dumpleton at gmail.com  Sun Aug 26 07:19:54 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Sun, 26 Aug 2007 11:19:54 -0000
Subject: Python error on Mac
In-Reply-To: <mailman.1.1188097118.28954.python-list@python.org>
References: <mailman.1.1188097118.28954.python-list@python.org>
Message-ID: <1188127194.110057.321140@x40g2000prg.googlegroups.com>

On Aug 26, 12:58 pm, Clover <antikr... at gmail.com> wrote:
> When trying to do some things on my Mac (starting Lyx, compiling Latex
> via TextMate) I get this error:
>
> python: execv:
> /Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/Contents/MacOS/Python:
> No such file or directory
>
> I (and people on Lyx and TextMate lists) are at a complete loss as to
> why this is happening. I didn't (at least intentionally) fiddle with
> Python setup.

The default operating system supplied version of Python on recent
versions of MacOS X is 2.3.5. Unless you have specifically installed
2.5, it will not exist. So, if those applications have it hardwired to
use Python 2.5 they will not work.

Graham



From james.pingenot at gmail.com  Wed Aug 22 15:23:36 2007
From: james.pingenot at gmail.com (james.pingenot)
Date: Wed, 22 Aug 2007 19:23:36 -0000
Subject: libgmail failure
In-Reply-To: <il_yi.1379$JD.695@newssvr21.news.prodigy.net>
References: <1187730447.621592.93740@q4g2000prc.googlegroups.com>
	<il_yi.1379$JD.695@newssvr21.news.prodigy.net>
Message-ID: <1187810616.747944.290720@i38g2000prf.googlegroups.com>

On Aug 22, 10:26 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> james.p.n... at gmail.com wrote:
> > Hey all,
>
> > I've been using libgmail to send out automated notification emails for
> > my company's nightly regression testing.  Last night these emails
> > started failing, though the python code has not changed.  I updated to
> > the latest libgmail, but that isn't helping.  I've logged in to the
> > email account directly, and the account is still working fine.
>
> > The error I get is "HTTP Error 400: Bad Request" when using
> > gmailAccount.login().  This doesn't throw an exception, just prints
> > the error.  The code crashes outright when it tries to send mail.
>
> > This code has been up and running for several months and just started
> > failing last night.  Does anyone have an idea what's going on?
>
> > The code and error follow (fairly short :-)
>
> > Thanks much,
> > James
>
> Have you thought about spoofing explorer? Always spoof explorer.
>
> James

I have not heard of this.  How do you spoof IE for libgmail?

Thanks,
James



From llothar at web.de  Fri Aug 31 21:16:57 2007
From: llothar at web.de (llothar)
Date: Fri, 31 Aug 2007 18:16:57 -0700
Subject: How to find out if the interpreter is a debug build?
Message-ID: <1188609417.273513.74450@i13g2000prf.googlegroups.com>

How can i find out if a selected python interpreter  (i only know the
path name under which i should start it) is a debug build?  I tried

sys.api_version, sys.platform, sys.version, sys.version_info

and there is no difference between  "python.exe" and "python_d.exe".
I'm pretty sure the information is stored somewhere but i can't find
it. Please help.



From kyosohma at gmail.com  Thu Aug  9 13:51:50 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 09 Aug 2007 10:51:50 -0700
Subject: how to get command output using python
In-Reply-To: <mailman.1803.1186679013.22759.python-list@python.org>
References: <b6bf7b050708090714vde102al5ea0c21bdae1a604@mail.gmail.com>
	<mailman.1803.1186679013.22759.python-list@python.org>
Message-ID: <1186681910.789048.132140@z24g2000prh.googlegroups.com>

On Aug 9, 12:01 pm, Arnau Sanchez <ar... at ehas.org> wrote:
> Steven Harms escribi?:
>
> > In python it is quite easy:
>
> > import commands
> > status, output = commands.getstatusoutput("my command")
>
> Uhm, this module has a big issue:
>
> (http://docs.python.org/lib/module-commands.html)
> ----
> 8.17 commands -- Utilities for running commands
>
> Availability: Unix.
> ----
>
> Any non cross-platform module should be avoided unless absolutely necessary.
>
> Subprocess is the right module to use.
>
> arnau

You forgot to mention that subprocess replaces commands, so in effect,
commands is deprecated anyway.

Mike



From dzjoost at gmail.com  Tue Aug 14 19:39:18 2007
From: dzjoost at gmail.com (Joost Molenaar)
Date: Wed, 15 Aug 2007 01:39:18 +0200
Subject: FM synthesis using Numpy
Message-ID: <3657a8860708141639l7e90ebdoe844691627152e40@mail.gmail.com>

Hello fellow Python coders,

I'm trying to build a simple FM synthesizer in Python. As a beginner,
I take 'FM synthesizer' to
mean: "using a sine wave to control the frequency of another sine wave."

I tried to generate a tone of 1000 Hz that deviates 15 Hz six times a
second. The start of the
resulting wave file sounds right, i.e., a vibrato effect can be heard.
After a second or so, the
vibrato becomes more and more extreme, as if the modulating
oscillator's amplitude is rising
over time. I suspect that I am misunderstanding the math. I tried a
couple of things:

- removing the factor 2 * num.pi from either of the oscillators does
not fix it, besides, doing so is
even more wrong because numpy.sin works with radians

- using a higher sampling frequency makes no difference

- making t run from 0 to 1 each second (t %= 1) causes a clipping of
the sound, so this seems
wrong too

- the problem is not related to Numpy, because the effect also happens
in pure-Python
implementations of my bug

As you can see, I'm at a loss and am even trying incorrect bugfixes.
Any help would be
very welcome.

Thanks for your time,

Joost Molenaar


[I left out a writewavheader function to aid brevity]
-------------------------------------------------------------------

import numpy as num

def oscillator(x, freq=1, amp=1, base=0, phase=0):
    return base + amp * num.sin(2 * num.pi * freq * x + phase)

def writewav(filename, data):
    wave = open(filename, 'wb')

    # .wav header: 30 s at 44100 Hz, 1 channel of 16 bit signed samples
    wave.write('RIFF\x14`(\x00WAVEfmt \x10\x00\x00\x00\x01\x00\x01\x00D'
               '\xac\x00\x00\x88X\x01\x00\x02\x00\x10\x00data\xf0_(\x00')

    # write float64 data as signed int16
    (32767 * data).astype(num.int16).tofile(wave)

    wave.close()

t = num.arange(0, 30, 1./44100)

freq = oscillator(t, freq=6, amp=15, base=1000)
tone = oscillator(t, freq=freq, amp=0.1)

writewav('spam.wav', tone)
-------------------------------------------------------------------


From jquinn+google at cs.oberlin.edu  Mon Aug 20 17:01:59 2007
From: jquinn+google at cs.oberlin.edu (jquinn+google at cs.oberlin.edu)
Date: Mon, 20 Aug 2007 14:01:59 -0700
Subject: Pattern for error checking easiest-first?
Message-ID: <1187643719.772672.70780@w3g2000hsg.googlegroups.com>

Heres the situation:

class AbstractThing():
    def changeMe(self,blah):
         if blah < 1:
              raise MyException
         self.blah = blah

class NetworkedThing(AbstractThing):
    def changeMe(self,blah):
        if blah > self.getUpperLimitOverTheNetworkSlowly:
             raise MyOtherException
        AbstractThing.changeMe(self,blah)


The problem is that code like this does error checking backwards. A
call to NetworkedThing.changeMe will first do a slow error check and
then a fast one. Obviously there are various ways to get around this -
either have the subclass explicitly ask the superclass to error check
first, or vice totally versa. Is there some accepted pattern/idiom for
handling this issue?



From pyth0nc0d3r at gmail.com  Thu Aug 23 16:55:54 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Thu, 23 Aug 2007 15:55:54 -0500
Subject: How would I go about making a file open. Not the way you might
	think.
In-Reply-To: <ntSdnapifutBbFDbnZ2dnUVZ_tWtnZ2d@comcast.com>
References: <eb79828c0708221959t18dd4024m251c1eac7732ec1f@mail.gmail.com>
	<mailman.159.1187857019.32294.python-list@python.org>
	<ntSdnapifutBbFDbnZ2dnUVZ_tWtnZ2d@comcast.com>
Message-ID: <eb79828c0708231355n6c342384r2edb99e13106e19d@mail.gmail.com>

I've completed this request and I got the answer already.

On 8/23/07, Larry Bates <larry.bates at websafe.com> wrote:
>
> Hendrik van Rooyen wrote:
> > Lamonte Harris  wrote:
> >
> >> Basically you can open a file by double clicking, and by default it
> would open
> > w/ what every program you have it set >to.  Most text files would open
> in
> > notepad.  How can I make a txt open so that notepad opens w/ the content
> in it
> > by >using just python.
> >
> > I asked this question just yesterday - and Tim Golden answered:
> >
> > os.startfile()
> >
> > - Hendrik
> >
> Actually os.startfile('filename.txt') will open the file with whatever
> application is associated with .txt files on that machine.  That could be
> different from notepad if the user has chosen to override the defaults.
>
> os.system('notepad.exe c:\\junk.txt')
>
> will force notepad.exe to load and it will load the file specified.
>
> All depends on what you want to do.
>
> -Larry
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From steve at holdenweb.com  Wed Aug 29 09:22:16 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 29 Aug 2007 09:22:16 -0400
Subject: handling tabular data in python--newbie question
In-Reply-To: <6cf42$46d56771$839b8704$5034@news1.tudelft.nl>
References: <6cf42$46d56771$839b8704$5034@news1.tudelft.nl>
Message-ID: <fb3ru5$nl4$1@sea.gmane.org>

hyena wrote:
> Hi,
>   Just jump in python few days. I am wondering how to store and index a 
> table in python effectively and easily.I think the basic data types are not 
> very straight foward to handle a table (eg, from csv or data base.)
> 
>   I have a csv file, the first row of it is column names and the rest rows 
> are data. There are some tens of columns and hundreds rows in the file. I am 
> planning to use the column names as variables to access data, currently I am 
> thinking of using a dictionary to store this file but did not figure out a 
> elegant way to start.
> 
>   Any comments and suggestions are wellcomed. Please forgive me if this 
> question is too naive , and yes, I did search google  a while but did not 
> find what I want.
> 
> Thanks 
> 
> 
One way would be to store each row as a dictionary. Suppose your data 
file is called "myfile.txt" and, for simplicity, that columns are 
separated by whitespace. Please note the following code is untested.

f = open("myfile.txt", "r")
names = file.next().split()

So now names contains a list of the field names you want to use. Let's 
store the rows in a dictionary of dictionaries, using the first column 
to index each row.

rows = {}
for line in file:
   cols = line.split()
   rdict =  dict(zip(names, cols))
   rows[cols[0]] = rdict

dict(zip(names, cols)) should create a dictionary where each field is 
stored against its column name. I assume that cols[0] is unique for each 
row, otherwise you will suffer data loss unless you check for that 
circumstance. You can check this kind of thing in the interactive 
interpreter:

 >>> names = ["first", "second", "third"]
 >>> dict(zip(names, [1, 2, 3])
... )
{'second': 2, 'third': 3, 'first': 1}
 >>>

Another alternative, however, would be to create an object for each row 
where the columns are stored as attributes. This approach would be 
useful if the column names are predictable, but rather less so if each 
of your data files were to use different column names. Let us know and 
if appropriate someone can point you at the "bunch" class.

Welcome to Python!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From paul.nospam at rudin.co.uk  Fri Aug 10 00:41:27 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Fri, 10 Aug 2007 05:41:27 +0100
Subject: Puzzled by "is"
References: <20070809194105.39BD11E400A@bag.python.org>
	<f9frbl$dps$1@sea.gmane.org>
	<mailman.1811.1186690896.22759.python-list@python.org>
Message-ID: <87bqdg80i0.fsf@rudin.co.uk>

John K Masters <johnmasters at oxtedonline.net> writes:

>
> OK fiddling around with this and reading the docs I tried:-
> a = 'qqqqqqqqqq' #10 q's
> b = 'qqqqqqqqqq' #10 q's
> a is b
> true
> c = 'q' * 10
> c
> 'qqqqqqqqqq' #10 q's
> d = 'q' * 10
> d
> 'qqqqqqqqqq' #10 q's
> c is d
> false
>
> So from what I've read "==" tests for equivalence, "is" tests for identity but
> that does not explain the behaviour above.
>

There's nothing especially to be explained, other than "that's the way
the compiler does it". Two equal string literals might be the same
object or they might not be. It's a language implementation detail.


From nospam.themindstorm at gmail.com  Wed Aug  1 04:40:16 2007
From: nospam.themindstorm at gmail.com (Alex Popescu)
Date: Wed, 1 Aug 2007 08:40:16 +0000 (UTC)
Subject: Where do they tech Python officialy ?
References: <1185209574.045112.163780@g4g2000hsf.googlegroups.com>
	<7xveca4ajp.fsf@ruckus.brouhaha.com>
	<1185265091.276958.239910@r34g2000hsd.googlegroups.com>
	<1i23wyk.avc945i4dwsiN%aleax@mac.com>
Message-ID: <Xns997F76611A611themindstorm@80.91.229.5>

aleax at mac.com (Alex Martelli) wrote in news:1i23wyk.avc945i4dwsiN%
aleax at mac.com:

> NicolasG <nicolasg at gmail.com> wrote:
>    ...
>> The problem is that I would like to work as a Python programmer but
>> all the job vacancies I can find requires a couple of years of
>> professional experience ... that I don't have. How a wanna be
>> programmer can start working as a programmer if there is no chance to
>> start from somewhere ? That's the reason I created this topic.
> 
> Open source projects do not require previous professional experience 
to
> accept volunteers.  So, one way out of your dilemma is to make a name
> for yourself as an open source contributor -- help out with Python
> itself and/or with any of the many open source projects that use 
Python,
> and you will both learn a lot _and_ acquire "professional experience"
> that any enlightened employer will recognize as such.  

It depends :-). In my experience I met employers being concerned by my 
implication in the oss world :-).

> That will take a
> while, but not as long as getting a college degree (and it will be far
> cheaper than the degree).
> 

I don't know much about the open community in Python world, but in Java 
world becoming a project member may be more difficult than getting a 
degree (or close to :-)) ).

bests,
./alex
--
.w( the_mindstorm )p.



From tamim.shahriar at gmail.com  Tue Aug 21 06:01:45 2007
From: tamim.shahriar at gmail.com (subeen)
Date: Tue, 21 Aug 2007 10:01:45 -0000
Subject: C# and Python
Message-ID: <1187690505.903506.79690@d55g2000hsg.googlegroups.com>

Hi,
I am a newcomer in Python.  I am going to write a small Python
application that will run in windows xp. This application needs to
have GUI. Is it possible to make a C# application using visual studio
2005 that will call the python scripts? Let me explain more here:
My program will generate a text file of 100 - 100000 random integers,
and sort those using various sorting methods. Now I have written
separate sorting scripts in Python (quick sort, insertion sort etc.).
But I want to write the GUI and number generation program in C#.net.
When the user clicks Quick Sort button, the quicksort.py will be
called and it will sort the numbers.

regards,
Subeen



From goldtech at worldpost.com  Sat Aug  4 17:43:59 2007
From: goldtech at worldpost.com (goldtech)
Date: Sat, 04 Aug 2007 14:43:59 -0700
Subject: Client-side HTML form processing with Python?
Message-ID: <1186263839.778333.143200@d30g2000prg.googlegroups.com>

I want to have an HTML form from a local local html file write a text
field's data to a local text file.

I have no client or server side tools like PHP, JAVA. I don't know
JavaScript. I can not add anything to the workstation I am using. It's
going to have to be a client-side solution - there's no CGI on the
server, no PHP.

It's XP with MS-Office, so I guess I have the usual active-x, and I
have Python 2.1.

Is there a way?  Thanks,
Lee G.



From martin at v.loewis.de  Mon Aug 13 13:51:58 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 13 Aug 2007 19:51:58 +0200
Subject: Python in Chinese
In-Reply-To: <1187026857.622808.80470@19g2000hsx.googlegroups.com>
References: <1187026857.622808.80470@19g2000hsx.googlegroups.com>
Message-ID: <46C09A3E.4040309@v.loewis.de>

Paul McGuire schrieb:
> Back in May, there was quite an extensive discussion of whether or not
> Python should support Unicode identifiers (with the final result being
> that this would be supported in Python 3).  In my periodic googling
> for pyparsing users, I stumbled upon Zhpy, a preprocessor that renders
> on the fly Chinese Python keywords and indentifiers written using
> traditional Chinese characters into ASCII counterparts, and then
> executes the resulting script.  

Interesting!

Notice what they do to the identifiers - when translating to "English",
the just number them. I wonder what this will do to backtraces,
cross-module imports, and such...

With Python 3, they can restrict themselves to just translating
keywords, and leave all identifiers in place.

Regards,
Martin


From steve at holdenweb.com  Fri Aug 17 02:05:01 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 17 Aug 2007 02:05:01 -0400
Subject: using super() to call two parent classes __init__() method
In-Reply-To: <1187328619.039289.244900@g4g2000hsf.googlegroups.com>
References: <1187328619.039289.244900@g4g2000hsf.googlegroups.com>
Message-ID: <fa3dq9$2nq$1@sea.gmane.org>

7stud wrote:
> When I run the following code and call super() in the Base class's
> __init__ () method,  only one Parent's __init__() method is called.
> 
> 
> class Parent1(object):
>     def __init__(self):
>         print "Parent1 init called."
>         self.x = 10
> 
> class Parent2(object):
>     def __init__(self):
>         print "Parent2 init called."
>         self.y = 15
> 
> class Base(Parent1, Parent2):
>     def __init__(self):
>         super(Base, self).__init__()
>         self.z = 20
> 
> b = Base()
> 
> --output:--
> Parent1 init called.
> 
If you want super() to work for you then all your classes have to use 
it. There is only one call to an __init__() method in your definitions - 
Parent1 and Parent2 should also be calling their super().__init__().

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From kyosohma at gmail.com  Fri Aug  3 15:15:35 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 03 Aug 2007 12:15:35 -0700
Subject: downloading files
In-Reply-To: <1186166920.757662.269340@o61g2000hsh.googlegroups.com>
References: <1186166920.757662.269340@o61g2000hsh.googlegroups.com>
Message-ID: <1186168535.345161.325580@j4g2000prf.googlegroups.com>

On Aug 3, 1:48 pm, Ehsan <ehsan.khod... at gmail.com> wrote:
> I foundd this code in ASPN  Python Cookbook for downloading files in
> python but when it finished downloading files the files became
> corrupted and didn't open, the files in internet havn't any problem:
>
> def download(url,fileName):
>         """Copy the contents of a file from a given URL
>         to a local file.
>         """
>         import urllib
>         webFile = urllib.urlopen(url)
>         localFile = open(fileName, 'w')
>         localFile.write(webFile.read())
>         webFile.close()
>         localFile.close()
> download('http://www.2shared.com/download/1839752/cd520048/
> xpersia14.3gp?tsid=20070803-143313-49566ea2', 'xpersia4.3gp' )

Uhhh...you probably need to change the open() command to binary mode.
Replace that line with this:

localFile = open(fileName, mode='wb')

I tried it on my PC to download a photo from one of my sites and it
worked great.

Mike



From sjmachin at lexicon.net  Fri Aug 31 20:29:48 2007
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 31 Aug 2007 17:29:48 -0700
Subject: Python Unicode to String conversion
In-Reply-To: <mailman.241.1188604582.28954.python-list@python.org>
References: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
	<mailman.241.1188604582.28954.python-list@python.org>
Message-ID: <1188606588.808009.10150@r23g2000prd.googlegroups.com>

On Sep 1, 9:56 am, "Chris Mellon" <arka... at gmail.com> wrote:
> On 8/31/07, thijs.br... at gmail.com <thijs.br... at gmail.com> wrote:
>
> > Hi everyone,
>
> > I'm having quite some troubles trying to convert Unicode to String
> > (for use in psycopg, which apparently doesn't know how to cope with
> > unicode strings).
>
> > The error I keep having is something like this:
> > ERREUR:  S?quence d'octets invalide pour le codage ?UTF8? : 0xe02063
>
> > (sorry, locale is french, it means "byte sequence invalid for encoding
> > <<utf8>>", the value is probably an e with one of the french accents)
>
> > I've found lots of stuff about this googling the error, but I don't
> > seem to be able to find a "works always"-function just to convert a
> > unicode variable back to string...
>
> encode().
>
>  You didn't post the code that was failing, I can encode that value
> into UTF-8
What is "that value"?
(1) unichr(0xe02063)? You must have a wide unicode build of Python ...
(2) u"\xe0\x20\x63"? Of course you can encode it; so what?

> (and unless I'm very much mistaken, you should be able to
> encode any unicode string to UTF-8).

That is true, by definition. However you are barking this truism up
the wrong tree. The unknown complainant's whinge is that it is
expecting a sequence of octets (an 8-bit string) that is valid UTF8,
but the actuality is something else. It is *NOT* trying to say that a
unicode input can't be converted to UTF8.



From bignose+hates-spam at benfinney.id.au  Tue Aug 28 19:02:09 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 29 Aug 2007 09:02:09 +1000
Subject: Check for dict key existence, and modify it in one step.
References: <1188311810.226363.295500@w3g2000hsg.googlegroups.com>
Message-ID: <87bqcrfeku.fsf@benfinney.id.au>

rodrigo <rodrigo.cr at gmail.com> writes:

> Im using this construct a lot:
> 
> if dict.has_key(whatever):
>     dict[whatever] += delta
> else:
>     dict[whatever] = 1

I'd prefer:

    foo.setdefault(whatever, 0)
    foo[whatever] += delta

> sometimes even nested:
> 
> if dict.has_key(whatever):
>     if dict[whatever].has_key(someother):
>         dict[whatever][someother] += delta
>     else:
>         dict[whatever][someother] = 1
> else:
>     dict[whatever]={}
>     dict[whatever][someother] = 1

    foo.setdefault(whatever, {})
    foo[whatever].setdefault(someother, 0)
    foo[whatever] += delta

> there must be a more compact, readable and less redundant way to do
> this, no?

Hope that helps.

-- 
 \        "I took a course in speed waiting. Now I can wait an hour in |
  `\                              only ten minutes."  -- Steven Wright |
_o__)                                                                  |
Ben Finney


From paddy3118 at googlemail.com  Wed Aug  8 13:38:40 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Wed, 08 Aug 2007 17:38:40 -0000
Subject: This bit of code hangs Python Indefinitely
In-Reply-To: <Xns9986A07CEFBE8duncanbooth@127.0.0.1>
References: <f9ch45$ku$1@solaris.cc.vt.edu>
	<mailman.1738.1186581012.22759.python-list@python.org>
	<f9ci4a$1t3$1@solaris.cc.vt.edu>
	<Xns9986A07CEFBE8duncanbooth@127.0.0.1>
Message-ID: <1186594720.330941.221440@d55g2000hsg.googlegroups.com>


> You could possibly make a case that before Queue.put blocks it should check
> whether the program has more than just the one thread and if not it should
> raise an RTFMException.

Cute :-)



From sawveq at gmail.com  Fri Aug 31 03:51:38 2007
From: sawveq at gmail.com (SAWVEQ)
Date: Fri, 31 Aug 2007 07:51:38 -0000
Subject: Requirement-HEAD OF TECHNOLOGY
Message-ID: <1188546698.143237.147060@m37g2000prh.googlegroups.com>

Senior Position Vacant for www.123greetings.com



                                                   Head of Technology
                                                      (Kolkata, India)

Responsibilities:

To Scale the website to handle large volumes of user traffic.
To lead the development team for Alexa Top 100 Web Property.
To Manage Relationships with DataCenters, CDN/Bandwidth providers,
ESP's etc.
To Implement next generation of web technologies.

Deliverables

Increase User Access Speed of the Website

    * Implement Distributed DNS
    * Implement Web Catching/Acceleration

Increase Website Uptime

    * Implement Load Balancing to handle 600 web servers
    * Manage servers spread across 5 Datacenters in 3 geographies
    * Implement Blade Servers/Web Farm

Website Management

    * Improve Content Management System to update 50,000 WebPages
daily.

Website Features

    * Implement Web 2.0 Features to increase stickiness of the
website.
    * Implement latest flash & streaming technologies for content
delivery.

Data Mining & Warehousing

    * To Collect & Store huge volumes of user data.
    * To Structure & Mine user data for trend, data analysis.

Requirements:

Profile

Exp:-10Years In related field

Required to manage & lead the development team consist of PHP & Perl
Programmers, Project Managers, Action Script Developers, JavaScript
Developers, Server Administrators.
Website Technologies

Operating Systems: Linux /Apache/FreeBSD; No Microsoft Technologies
Development Languages: Open Source Technologies (Perl/PHP/MySQL) Front
End languages: JavaScript, AJAX, HTML, CSS, Flash ActionScript
Developers.


Interested Candidate plz contact - souvik.mukherjee at itlindia.com
or visit  http://www.123greetings.com/careers/form.html for more
details



From aleax at mac.com  Mon Aug 27 00:07:26 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 26 Aug 2007 21:07:26 -0700
Subject: beginner, idiomatic python
References: <13cqlqbbpn0dmea@corp.supernews.com>
	<1187898049.734696.9500@l22g2000prc.googlegroups.com>
	<13csi2tn49esmc3@corp.supernews.com>
	<mailman.230.1187928865.32294.python-list@python.org>
	<13csqk47j0c56b0@corp.supernews.com>
	<CqSdnRl2x8928FPbnZ2dnUVZ_jSdnZ2d@speakeasy.net>
	<13ct7v3qn2v5206@corp.supernews.com>
	<13d00hu2mflt01b@corp.supernews.com>
	<13d4bn9kchd9u94@corp.supernews.com>
Message-ID: <1i3h19b.1yiv6tjnazk9iN%aleax@mac.com>

bambam <david at asdf.asdf> wrote:
   ...
> Bags don't seem to be built in to my copy of Python, and

A "bag" is a collections.defaultdict(int) [[you do have to import
collections -- it's in the standard library, NOT built-in]].


Alex


From hortitude at gmail.com  Sun Aug 19 23:58:38 2007
From: hortitude at gmail.com (hortitude at gmail.com)
Date: Mon, 20 Aug 2007 03:58:38 -0000
Subject: popen4 not returning output
Message-ID: <1187582318.054450.76960@z24g2000prh.googlegroups.com>

I am trying to run the following script:


#!/usr/bin/python

import popen2

commandToRun = """scp scp_trial.py user at host:/targetDirectory"""
#commandToRun = "ls"
print commandToRun
p_out, p_in = popen2.popen4 (commandToRun)

theOut = p_out.readlines ()
print theOut


When I run this command with the "ls" command I see the output.
When I run this with the scp command I do not see the output of my
command -- however the file is successfully transfered.  How can I see
the output?

Thanks



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Aug 11 17:40:45 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 11 Aug 2007 23:40:45 +0200
Subject: python 2.5 bug
References: <1186825286.493878.80380@l70g2000hse.googlegroups.com>
	<5i5fktF3ml00gU1@mid.uni-berlin.de>
	<1186826980.346619.287670@r34g2000hsd.googlegroups.com>
	<46bdfb3f$0$5102$ba4acef3@news.orange.fr>
	<MPG.2128171394cc51d9989700@news.individual.de>
Message-ID: <5i6omtF3mr9f4U3@mid.individual.net>

Thorsten Kampe wrote:

> Yeah. Did the Original Poster mention any details about his
> problem. Like - for instance - that he's using Windows?

Don't you know the empiric law of platforms? :) "Users who ask about
OS specific problems and not state their platform are Windows
users."

Regards,


Bj?rn

-- 
BOFH excuse #284:

Electrons on a bender



From stefan.behnel-n05pAM at web.de  Wed Aug 29 12:44:34 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 29 Aug 2007 18:44:34 +0200
Subject: replacing xml elements with other elements using lxml
In-Reply-To: <1188399381.188639.289480@57g2000hsv.googlegroups.com>
References: <1188399381.188639.289480@57g2000hsv.googlegroups.com>
Message-ID: <46D5A272.2000509@web.de>

Ultrus wrote:
> I'm attempting to generate a random story using xml as the document,
> and lxml as the parser. I want the document to be simplified before
> processing it further, and am very close to accomplishing my goal.
> Below is what I have so far. Any ideas on how to move forward?
> 
> The goal:
> read and edit xml file, replacing random elements with randomly picked
> content from within
> 
> Completed:
> [x] read xml
> [x] access first random tag
> [x] pick random content within random item
> [o] need to replace <random> tag with picked contents
> 
> xml sample:
> <contents>Here is some content.</contents>
> <random>
>    <item><contents>Here is some random content.</contents></item>
>    <item><contents>Here is some more random content.</contents></item>
> </random>
> <contents>Here is some content.</contents>

Hmm, this is not well-formed XML, so I assume you stripped the example. The
root element is missing.


> Python code:
> from lxml import etree
> from StringIO import StringIO
> import random
> 
> theXml = "<contents>Here is some content.</
> contents><random><item><contents>Here is some random content.</
> contents></item><item><contents>Here is some more random content.</
> contents></item></random><contents>Here is some content.</contents>"
> 
> f = StringIO(theXml)
> tree = etree.parse(f)

             ^^^^^
This would raise an exception if the above really *was* your input.


> r = tree.xpath('//random')
> 
> if len(r) > 0:
>    randInt = random.randInt(0,(len(r[0]) - 1))
>    randContents = r[0][randInt][0]
>    #replace parent random tag with picked content here
> 
> now that I have the contents tag randomly chosen, how do I delete the
> parent <random> tag, and replace it to look like this:
> 
> final xml sample (goal):
> <contents>Here is some content.</contents>
> <contents>Here is some random content.</contents>
> <contents>Here is some content.</contents>

what about:

   r.getparent().replace(r, random.choice(r))

?

Stefan


From james.p.news at gmail.com  Tue Aug 21 17:07:27 2007
From: james.p.news at gmail.com (james.p.news at gmail.com)
Date: Tue, 21 Aug 2007 21:07:27 -0000
Subject: libgmail failure
Message-ID: <1187730447.621592.93740@q4g2000prc.googlegroups.com>

Hey all,

I've been using libgmail to send out automated notification emails for
my company's nightly regression testing.  Last night these emails
started failing, though the python code has not changed.  I updated to
the latest libgmail, but that isn't helping.  I've logged in to the
email account directly, and the account is still working fine.

The error I get is "HTTP Error 400: Bad Request" when using
gmailAccount.login().  This doesn't throw an exception, just prints
the error.  The code crashes outright when it tries to send mail.

This code has been up and running for several months and just started
failing last night.  Does anyone have an idea what's going on?

The code and error follow (fairly short :-)

Thanks much,
James



Code:
-------------------------------------------------------------------------------------------------------
def send(TO_LIST,SUBJECT,MESSAGE):
    GA = libgmail.GmailAccount("xxxxxx at gmail.com","xxxxxxx")
    try:
        print "Logging in"
        GA.login()
    except libgmail.GmailLoginFailure:
        print "\nLogin failed. (Wrong username/password?)"
    else:
        print "Log in successful.\n"
        for RX in TO_LIST:
            MSG = libgmail.GmailComposedMessage(RX,SUBJECT,MESSAGE)
            if GA.sendMessage(MSG):
                print "Message successfully sent to `%s` ." % RX
            else:
                print "Could not send message."
-------------------------------------------------------------------------------------------------------

Output:
-------------------------------------------------------------------------------------------------------
Logging in
HTTP Error 400: Bad Request
Log in successful.

No messages found
Traceback (most recent call last):
  File "C:\projects\physware\testCases\PythonTestScripts
\SendEmail.py", line 58, in <module>
    main()
  File "C:\projects\physware\testCases\PythonTestScripts
\SendEmail.py", line 55, in main
    send(TO_LIST,SUB,MSG)
  File "C:\projects\physware\testCases\PythonTestScripts
\SendEmail.py", line 39, in send
    if GA.sendMessage(MSG):
  File "C:\projects\physware\testCases\PythonTestScripts\libgmail.py",
line 588, in sendMessage
    U_ACTION_TOKEN: self._getActionToken(),
  File "C:\projects\physware\testCases\PythonTestScripts\libgmail.py",
line 563, in _getActionToken
    at = self._cookieJar._cookies[ACTION_TOKEN_COOKIE]
KeyError: 'GMAIL_AT'
-------------------------------------------------------------------------------------------------------



From larry.bates at websafe.com  Tue Aug 14 08:06:06 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 14 Aug 2007 07:06:06 -0500
Subject: Drawing a graph
In-Reply-To: <mailman.1917.1187012829.22759.python-list@python.org>
References: <mailman.1917.1187012829.22759.python-list@python.org>
Message-ID: <46C19AAE.4010009@websafe.com>

Ghirai wrote:
> Hello list,
> 
> I need to draw a graph, 2 axes, 2D, nothing fancy.
> One of the axes is time, the other one is a series of integers.
> 
> I don't care much about the output format.
> 
> Are there any specialized libraries for this, or should i use PIL?
> 
> Thanks.
> 
ReportLab graphics works for me.

www.reportlab.org

-Larry



From siona at chiark.greenend.org.uk  Thu Aug  9 11:51:01 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 09 Aug 2007 16:51:01 +0100 (BST)
Subject: Help with Dictionaries and Classes requested please.
References: <46bacae3$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
	<46bacf1b$0$54289$7b0f0fd3@mistral.news.newnet.co.uk>
	<87ejic6dkw.fsf@benfinney.id.au>
	<46bb19e2$0$9835$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <59o*53SRr@news.chiark.greenend.org.uk>

special_dragonfly <Dominic at PLEASEASK.co.uk> wrote:
>        if key in FieldsDictionary:
>            FieldsDictionary[key].append(FieldClass(*line.split(",")))
>        else:
>            FieldsDictionary[key]=[FieldClass(*line.split(","))]

These four lines can be replaced by:

FieldsDictionary.setdefault(key, []).append(FieldClass(*line.split(",")))

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
   "Frankly I have no feelings towards penguins one way or the other"
        -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From hniksic at xemacs.org  Tue Aug 21 09:34:41 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Tue, 21 Aug 2007 15:34:41 +0200
Subject: File Read Cache - How to purge?
References: <1187669203.698637.81990@i38g2000prf.googlegroups.com>
Message-ID: <87veb9xb7y.fsf@mulj.homelinux.net>

Signal <mugi at pinesalad.net> writes:

> 2. Is there anyway to somehow to take advantage of this "caching" by
> initializing it without reading through the entire file first?
>
> 3. If the answer to #2 is No, then is there a way to purge this
> "cache" in order to get a more accurate result in my routine?  That
> is without having to read another large file first?

On a Unix system the standard way to purge the cache is to unmount the
file system and remount it.  If you can't do that on Windows, you can
get the same effect by placing the test files on an external (USB)
hard drive; unplugging the drive and plugging it back again will
almost certainly force the OS to flush any associated caches.  Having
to do that is annoying, even as a last resort, but still better than
nothing.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Aug  7 06:22:11 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 07 Aug 2007 12:22:11 +0200
Subject: Global package variable, is it possible?
In-Reply-To: <1186438575.861738.173900@g12g2000prg.googlegroups.com>
References: <1186160415.065108.139160@e9g2000prf.googlegroups.com>
	<46b6d0b4$0$29273$426a74cc@news.free.fr>
	<1186438575.861738.173900@g12g2000prg.googlegroups.com>
Message-ID: <46b847bb$0$1940$426a74cc@news.free.fr>

Chris Allen a ?crit :
> On Aug 6, 12:41 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>> Chris Allen a ?crit :
>>
(snip)
>> Hi Chris...
>> I've read all the thread, and it seems that your problem is mostly to
>> share a single dynamic state (the config) between several modules. So I
>> do wonder: have you considered the use of the Singleton pattern (or one
>> of it's variants...) ?
> 
> Thanks, I don't know anything about python singletons. 

It's a design pattern, so it's not realluy language specific. I thought 
about this because some of your wordings in various posts in this thread 
clearly called for such a pattern, but Ben is right, it won't probably 
buy you more than a plain python module (which are one of the possible 
implementations of the Singleton pattern).


From pyth0nc0d3r at gmail.com  Mon Aug 27 23:42:01 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Mon, 27 Aug 2007 22:42:01 -0500
Subject: Asking all python programmers.
Message-ID: <eb79828c0708272042x238f575aq28d01964bf6ab1db@mail.gmail.com>

Okay,  I know you've guys told me millions of times to read the manual I've
read a lot of it.  What do you recommend studying the most? Python is my
goal for the next year in the half. :)
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From http  Wed Aug  8 23:03:00 2007
From: http (Paul Rubin)
Date: 08 Aug 2007 20:03:00 -0700
Subject: Issues of state (was: Tkinter or wxpython?)
References: <op.tv98rva4wepdt4@ericb.pragmadev>
	<mailman.1684.1186422197.22759.python-list@python.org>
	<gg9mo4-p2m.ln1@lairds.us> <7x8x8mpn37.fsf@ruckus.brouhaha.com>
	<hblpo4-mgj.ln1@lairds.us>
Message-ID: <7xfy2t8l5n.fsf@ruckus.brouhaha.com>

claird at lairds.us (Cameron Laird) writes:
> Others have answered this at other levels.  In elementary terms,
> there truly is a difference, Paul, and one that's widely reified:
> a "desktop client-server" application typically listens through
> one socket, which therefore constitutes an index of the connection
> or client, while a Web application communicates through a sequence
> of independent HTTP transactions.  The latter can manage state only
> to the extent it passes session information around.

Is this significant?  In the case of a single user http app running on
the same computer as the browser, the server should only listen on
127.0.0.1.  Every http hit then almost certainly comes from the same
session.  If there's doubt, the app can always set a random cookie at
the initial screen and check that the cookie never changes.

If there's only a small amount of session state (say up to a few
hundred bytes) you can put it entirely into browser cookies and send
it on every single http hit.