[Tutor] Tutor Digest, Vol 77, Issue 25

[Edward Lang]

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>Today's Topics:
>
>   1. Re: Having a return when subprocess.Popen finishes (Nick Raptis)
>   2. Re: Having a return when subprocess.Popen finishes (Payal)
>   3. Re: Django Read (Huy Ton That)
>   4. Re: differences between mmap and StringIO (Christopher King)
>   5. Re: Tkinter mainloop() (Francesco Loffredo)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Thu, 08 Jul 2010 16:33:02 +0300
>From: Nick Raptis <airscorp at otenet.gr>
>To: tutor at python.org
>Subject: Re: [Tutor] Having a return when subprocess.Popen finishes
>Message-ID: <4C35D38E.4090904 at otenet.gr>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>subprocess.Popen is a class, and as such it returns an object which can 
>do a lot of stuff besides just reading the output.
>
>What you want to do here is using it's communicate() method as such:
>
>output, errors = ping.communicate()
>
>
>Also, there is a quicker way, I think from version 2.7 forward: use  the 
>shortcut
>output = subprocess.check_output("your command here")
>
>Always check latest documentation for your python version too
>http://docs.python.org/library/subprocess.html
>
>Nick
>
>On 07/08/2010 04:04 PM, Paul VanGundy wrote:
>> Hi All,
>>
>> I'm trying to get data from subprocess.Popen. To be specific, I am
>> trying to read a ping echo and take the output and assign it to a
>> variable like below:
>>
>> ping = subprocess.Popen("ping -c 5 %s" % (server),
>> stdout=subprocess.PIPE, shell=True)
>>
>> However, when I run the command the output that gets assigned to my ping
>> variable is something along the lines of '<subprocess.Popen object at
>> 0x9524bec>' and am not returned to>>>  prompt. I know that is the proper
>> output but I need to be able to capture the ping replies and assign
>> those to a variable. I tried adding a \r and \n at the end of my cmd.
>> Any help would be greatly appreciated. I'm open to improvements,
>> different ways of doing it and corrections. :) If more info is needed
>> let me know. Thanks.
>>
>> /paul
>> _______________________________________________
>> Tutor maillist  -  Tutor at python.org
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>>
>>    
>
>
>------------------------------
>
>Message: 2
>Date: Thu, 8 Jul 2010 06:39:51 -0700
>From: Payal <payal-python at scriptkitchen.com>
>To: tutor at python.org
>Subject: Re: [Tutor] Having a return when subprocess.Popen finishes
>Message-ID: <20100708133951.GA4572 at scriptkitchen.com>
>Content-Type: text/plain; charset=us-ascii
>
>On Thu, Jul 08, 2010 at 09:04:54AM -0400, Paul VanGundy wrote:
>> Hi All,
>> 
>> I'm trying to get data from subprocess.Popen. To be specific, I am
>> trying to read a ping echo and take the output and assign it to a
>> variable like below:
>> 
>> ping = subprocess.Popen("ping -c 5 %s" % (server),
>> stdout=subprocess.PIPE, shell=True)
>
>>>> import subprocess
>>>> server = 'localhost'
>>>> ping = subprocess.Popen("ping -c 5 %s" %
>>>> (server),stdout=subprocess.PIPE, shell=True)
>>>> ping.communicate()
>('PING localhost (127.0.0.1) 56(84) bytes of data.\n64 bytes from
>localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.044 ms\n64 bytes from
>localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.046 ms\n64 bytes from
>localhost (127.0.0.1): icmp_seq=3 ttl=64 time=0.052 ms\n64 bytes from
>localhost (127.0.0.1): icmp_seq=4 ttl=64 time=0.046 ms\n64 bytes from
>localhost (127.0.0.1): icmp_seq=5 ttl=64 time=0.049 ms\n\n--- localhost
>ping statistics ---\n5 packets transmitted, 5 received, 0% packet loss,
>time 3997ms\nrtt min/avg/max/mdev = 0.044/0.047/0.052/0.006 ms\n', None)
>>>>
>
>hth,
>With warm regards,
>-Payal
>-- 
>
>
>
>------------------------------
>
>Message: 3
>Date: Thu, 8 Jul 2010 10:19:38 -0400
>From: Huy Ton That <huyslogic at gmail.com>
>To: Jeff Johnson <jeff at dcsoftware.com>
>Cc: tutor at python.org
>Subject: Re: [Tutor] Django Read
>Message-ID:
>	<AANLkTik4qWUfiMJC3-gR4y4WX36PKHUIAyjbpT-lm7B9 at mail.gmail.com>
>Content-Type: text/plain; charset="iso-8859-1"
>
>I've went through the djangobook myself, and found it quite readable. This
>would be my recommendation as well.
>
>Be sure to read the sidebar comments; if you ever feel stuck, someone else
>may have addressed the question/answer for you!
>
>-Lee
>
>On Thu, Jul 8, 2010 at 9:31 AM, Jeff Johnson <jeff at dcsoftware.com> wrote:
>
>> On 07/08/2010 06:06 AM, Nick Raptis wrote:
>>
>>> There actually aren't that many books on django around yet which is a
>>> pity.
>>> You should definitely read "The django book":
>>> http://www.djangobook.com/en/2.0/
>>> either on the online version on that link, or it's printed counterpart
>>> (yes, it's really the same book):
>>> http://www.amazon.com/Definitive-Guide-Django-Development-Second/dp/143021936X/
>>>
>>> The printed one is a bit more updated (1.1) and pays off it's money
>>> because of it's great reference section :)
>>>
>>> Nick
>>>
>>> On 07/08/2010 03:48 PM, Dipo Elegbede wrote:
>>>
>>>> Hi all,
>>>>
>>>> I have done a little basic on python and have to start working on a
>>>> major django platform.
>>>> I'm starting new and would like recommendations on books I can read.
>>>>
>>>> Kindly help me out. I want to get my hands dirty as fast as I can so
>>>> that I can be part of the project.
>>>>
>>>> Thanks and Best regards,
>>>>
>>>>
>>>  I have six books on my bookshelf for Django.  There are others I don't
>> have.  Django 1.0 Template Development is my favorite.  Many of them walk
>> you through building apps step by step.  Do a search on Amazon.  That is
>> where I got most of them.
>>
>> --
>> Jeff
>>
>> -------------------
>>
>> Jeff Johnson
>> jeff at dcsoftware.com
>>
>>
>>
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>------------------------------
>
>Message: 4
>Date: Thu, 8 Jul 2010 18:39:33 -0400
>From: Christopher King <g.nius.ck at gmail.com>
>To: Eduardo Vieira <eduardo.susan at gmail.com>
>Cc: Tutor Mailing List <tutor at python.org>
>Subject: Re: [Tutor] differences between mmap and StringIO
>Message-ID:
>	<AANLkTin1YIBQ5BIOoZu95NYLv_FGRcVuWRHWtHkPnZbf at mail.gmail.com>
>Content-Type: text/plain; charset="iso-8859-1"
>
>Well, I would just use the builting function open. I think Nick said in the
>beggining. Or, I would use the module I created. It's a file object, with
>the property file_txt. Unlike the other modules which you have to use read
>and write methods, I made a method which allows you to manulipulate like a
>string. I didn't even add a appending feature, but doing file.file_txt +=
>'bla', you can append. I can send it to you if you like.
>
>On Wed, Jul 7, 2010 at 6:52 PM, Eduardo Vieira <eduardo.susan at gmail.com>wrote:
>
>> Hello, I'm getting confused about the usage of those 2 modules. Which
>> should I use one to get/manipulate data from a text file?
>>
>> Regards,
>>
>> Eduardo
>> www.express-sign-supply.com
>> _______________________________________________
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>------------------------------
>
>Message: 5
>Date: Thu, 08 Jul 2010 20:40:36 +0200
>From: Francesco Loffredo <ilcomputertrasparente at gmail.com>
>To: tutor at python.org
>Subject: Re: [Tutor] Tkinter mainloop()
>Message-ID: <4C361BA4.4050002 at libero.it>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>
>
>Il 07/07/2010 9.11, Alan Gauld wrote:
>>
>> "Francesco Loffredo" <ilcomputertrasparente at gmail.com> wrote
>>
>>> ... What's the
>>> difference between the two methods?
>>
>> Its a little bit subtle but I believbe update() updates all widgets
>> whereas update_idle_tasks will only update those widgets that
>> have changed since the last update. In a complex GUI this can
>> be notably faster. Most of the books I've seen recommend not
>> using update() as it can cause race conditions but I have no experience
>> of that - because I use update_idle_tasks! :-)
>
>Ok, now I'm using update_idletasks() too (update_idle_tasks() doesn't 
>exist) and I like it. Thanks a lot!
>
>> ...
>
>>> where would you put the
>>> automatic move call, if not where I did? I need an automatic move be
>>> performed at the proper moment, when it's the computer player turn.
>>
>> Create the auto move in an event handler of its own and associate
>> with an event. Then raise that event when your players move is finished.
>> Tkinter will then call the automove for you, updating the screeen
>> automatically. In an event driven environment control is passed
>> around by means of events.
>I prefer not to make this project fully event driven, because while it's 
>fairly easy to translate a mouse click into the game coordinates of the 
>hex that's being clicked, I don't like translating a pair of integers to 
>some point (maybe the center) of an hexagon, creating an Event 
>structure, raising that Event and handling it, just to figure out...the 
>same couple of integers I started with. No, I prefer not to create fake 
>Events when there's none involved... at least in this little game. I'll 
>remember your advice for some serious project!
>>
>> How do you raise an event in Tkinter?
>> Use the event_generate() method.
>And this would have been my next question, thanks for mind-reading!
>>
>> Alternatively use the after() method with a short delay - say 10ms...
>That's what I actually did. It plays like a charm! THANK YOU!
>>
>> HTH,
>   SID!
>
>Francesco
>
>
>------------------------------
>
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>End of Tutor Digest, Vol 77, Issue 25
>*************************************