From mark at microenh.com  Wed Mar 10 21:34:07 2010
From: mark at microenh.com (Mark Erbaugh)
Date: Wed, 10 Mar 2010 15:34:07 -0500
Subject: [CentralOH] Files and context manager
Message-ID: <077B3F36-43B9-446F-BBDC-10518D6FF5C8@microenh.com>

Hi,

A common idiom with older versions of Python is:

x = open(filename,'rb').read()

With context managers in 2.6+ you could say:

with open(filename,'rb') as f:
	x = f.read()

Is the later safer in that it explicitly will call close() whereas the former depends on the file destructor to close the file?

Thanks,
Mark

From mark at microenh.com  Wed Mar 10 21:39:19 2010
From: mark at microenh.com (Mark Erbaugh)
Date: Wed, 10 Mar 2010 15:39:19 -0500
Subject: [CentralOH] Files and context manager
In-Reply-To: <077B3F36-43B9-446F-BBDC-10518D6FF5C8@microenh.com>
References: <077B3F36-43B9-446F-BBDC-10518D6FF5C8@microenh.com>
Message-ID: <3C60935B-9162-4B9E-ADE3-D72A831398E8@microenh.com>


> 
> A common idiom with older versions of Python is:
> 
> x = open(filename,'rb').read()
> 
> With context managers in 2.6+ you could say:
> 
> with open(filename,'rb') as f:
> 	x = f.read()
> 
> Is the later safer in that it explicitly will call close() whereas the former depends on the file destructor to close the file?
> 

I forgot the second half of my question.

Is a function like:

def getData(filename):
	with open(filename,'rb') as f:
             return f.read()


a good idea?
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From brian.costlow at gmail.com  Wed Mar 10 23:34:27 2010
From: brian.costlow at gmail.com (Brian Costlow)
Date: Wed, 10 Mar 2010 17:34:27 -0500
Subject: [CentralOH] Files and context manager
In-Reply-To: <3C60935B-9162-4B9E-ADE3-D72A831398E8@microenh.com>
References: <077B3F36-43B9-446F-BBDC-10518D6FF5C8@microenh.com>
	<3C60935B-9162-4B9E-ADE3-D72A831398E8@microenh.com>
Message-ID: <89d8b1b01003101434r6812d707he6ae967036f4b3c0@mail.gmail.com>

Hi Mark,

Yes. Although you can get that same level of safety without them.

The way contexts are used with file objects in python is they are a shortcut for

try:
    x = open(filename,'rb').read()
    # do stuff with x
finally:
    x.close()

If you need to do error handling though, you still need to catch
exceptions. But if you are catching them farther upstream you don't
need to clutter your code with try blocks just for the file
open/read/close idiom.

Not sure what you mean by a good idea. If you have code in a bunch of
places in an app that opens and reads files by filename, of course
putting that in a function is a good idea. But if you are asking, is
it okay to just read a (potentially large) file into memory using
read(), I do it all the time for files in the 5-35 mb range in an app
that checksums images.




On Wed, Mar 10, 2010 at 3:39 PM, Mark Erbaugh <mark at microenh.com> wrote:
>
>
> A common idiom with older versions of Python is:
>
> x = open(filename,'rb').read()
>
> With context managers in 2.6+ you could say:
>
> with open(filename,'rb') as f:
> x = f.read()
>
> Is the later safer in that it explicitly will call close() whereas the
> former depends on the file destructor to close the file?
>
>
> I forgot the second half of my question.
> Is a function like:
> def getData(filename):
> with open(filename,'rb') as f:
> ?? ? ? ? ? ? return f.read()
>
> a good idea?
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> http://mail.python.org/mailman/listinfo/centraloh
>
>

From brian.costlow at gmail.com  Thu Mar 11 22:07:15 2010
From: brian.costlow at gmail.com (Brian Costlow)
Date: Thu, 11 Mar 2010 16:07:15 -0500
Subject: [CentralOH] Fwd:  Files and context manager
In-Reply-To: <89d8b1b01003111255t70b98566x98415164e4e11a15@mail.gmail.com>
References: <077B3F36-43B9-446F-BBDC-10518D6FF5C8@microenh.com>
	<3C60935B-9162-4B9E-ADE3-D72A831398E8@microenh.com>
	<89d8b1b01003101434r6812d707he6ae967036f4b3c0@mail.gmail.com>
	<EA55D66F-047F-4B3C-90F1-59A5FB9532F2@microenh.com>
	<89d8b1b01003111255t70b98566x98415164e4e11a15@mail.gmail.com>
Message-ID: <89d8b1b01003111307r37c5c11cre334d455cdcf9313@mail.gmail.com>

forgot to reply all on this..so forwarding to the group


---------- Forwarded message ----------
From: Brian Costlow <brian.costlow at gmail.com>
Date: Thu, Mar 11, 2010 at 3:55 PM
Subject: Re: [CentralOH] Files and context manager
To: Mark Erbaugh <mark at microenh.com>


On Thu, Mar 11, 2010 at 3:02 PM, Mark Erbaugh <mark at microenh.com> wrote:
> Brian,
>
> Thanks for the reply. ?The point of my question was
>
> I guess the real point about
>
> x = open(filename,'rb').read()
>
> is that close is never called. Is that safe, just relying on the file object's destructor.

Not really. If you are doing something that opens a lot of files you
can get in a situation where file handles run out.
This can especially bite if you handle errors somewhere upstream, and
don't exit, or if you end up with circular refs somehow.
Hard to debug because everything usually seems fine, but you run out
of file handles.
Or, in Windows, you can leave files possibly unaccessible by other apps.
If it's just a command line util that opens a couple of files, does
something, then exits, you can get away with it. But I don't think
it's good practice.



>
> My second question was more about the details of context managers:
>
>
> with open(filename,'rb') as f:
> ? ? ? ?return f.read()
>
> What happens when a return statement terminates a context manager rather than falling off the end of the code.

It doesn't need to 'fall off the end', just exit the block, which the
return does. Here's some sample code that shows this.
Substitute a real file path for /some/file/path,

import os

def foo(file_path):
? ? ? ?with open(file_path,'rb') as f:
? ? ? ? ? ? ? ?fnum = f.fileno()
? ? ? ? ? ? ? ?return (f.read(),fnum)
? ? ? ? ? ? ? ?print 'unreachable\n'

contents,fid = foo('/some/file/path')
os.fstat(fid)

Will raise a OSError: [Errno 9] Bad file descriptor on the descriptor
since it's been closed.



>
> Is it a shortcut for
>
> try:
> ?x = open(filename,'rb')
> ?return x.read()
> finally:
> ?x.close()
>
> Thanks,
> Mark
>
> On Mar 10, 2010, at 5:34 PM, Brian Costlow wrote:
>
>> Hi Mark,
>>
>> Yes. Although you can get that same level of safety without them.
>>
>> The way contexts are used with file objects in python is they are a shortcut for
>>
>> try:
>> ? ?x = open(filename,'rb').read()
>> ? ?# do stuff with x
>> finally:
>> ? ?x.close()
>>
>> If you need to do error handling though, you still need to catch
>> exceptions. But if you are catching them farther upstream you don't
>> need to clutter your code with try blocks just for the file
>> open/read/close idiom.
>>
>> Not sure what you mean by a good idea. If you have code in a bunch of
>> places in an app that opens and reads files by filename, of course
>> putting that in a function is a good idea. But if you are asking, is
>> it okay to just read a (potentially large) file into memory using
>> read(), I do it all the time for files in the 5-35 mb range in an app
>> that checksums images.
>>
>>
>>
>>
>> On Wed, Mar 10, 2010 at 3:39 PM, Mark Erbaugh <mark at microenh.com> wrote:
>>>
>>>
>>> A common idiom with older versions of Python is:
>>>
>>> x = open(filename,'rb').read()
>>>
>>> With context managers in 2.6+ you could say:
>>>
>>> with open(filename,'rb') as f:
>>> x = f.read()
>>>
>>> Is the later safer in that it explicitly will call close() whereas the
>>> former depends on the file destructor to close the file?
>>>
>>>
>>> I forgot the second half of my question.
>>> Is a function like:
>>> def getData(filename):
>>> with open(filename,'rb') as f:
>>> ? ? ? ? ? ? ?return f.read()
>>>
>>> a good idea?
>>> _______________________________________________
>>> CentralOH mailing list
>>> CentralOH at python.org
>>> http://mail.python.org/mailman/listinfo/centraloh
>>>
>>>
>
>

From eric at intellovations.com  Thu Mar 11 22:13:00 2010
From: eric at intellovations.com (Eric Floehr)
Date: Thu, 11 Mar 2010 16:13:00 -0500
Subject: [CentralOH] Fwd: Files and context manager
In-Reply-To: <89d8b1b01003111307r37c5c11cre334d455cdcf9313@mail.gmail.com>
References: <077B3F36-43B9-446F-BBDC-10518D6FF5C8@microenh.com>
	<3C60935B-9162-4B9E-ADE3-D72A831398E8@microenh.com>
	<89d8b1b01003101434r6812d707he6ae967036f4b3c0@mail.gmail.com>
	<EA55D66F-047F-4B3C-90F1-59A5FB9532F2@microenh.com>
	<89d8b1b01003111255t70b98566x98415164e4e11a15@mail.gmail.com>
	<89d8b1b01003111307r37c5c11cre334d455cdcf9313@mail.gmail.com>
Message-ID: <34f468871003111313t7758016dgcc3cbdc29c66d459@mail.gmail.com>

On Thu, Mar 11, 2010 at 4:07 PM, Brian Costlow <brian.costlow at gmail.com>wrote:

> forgot to reply all on this..so forwarding to the group
>
>

Ok, practicality wins out over academic purity of email headers.  I've
switched centraloh reply-to to go to the list rather than poster.  We all
can benefit from replies to this list...this isn't an announcement list or
what-not, but a discussion board.

No more forgetting to "reply-all" :-).

-Eric
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From nick.albright at gmail.com  Thu Mar 11 22:17:08 2010
From: nick.albright at gmail.com (Nick Albright)
Date: Thu, 11 Mar 2010 16:17:08 -0500
Subject: [CentralOH] Fwd: Files and context manager
In-Reply-To: <34f468871003111313t7758016dgcc3cbdc29c66d459@mail.gmail.com>
References: <077B3F36-43B9-446F-BBDC-10518D6FF5C8@microenh.com> 
	<3C60935B-9162-4B9E-ADE3-D72A831398E8@microenh.com>
	<89d8b1b01003101434r6812d707he6ae967036f4b3c0@mail.gmail.com> 
	<EA55D66F-047F-4B3C-90F1-59A5FB9532F2@microenh.com>
	<89d8b1b01003111255t70b98566x98415164e4e11a15@mail.gmail.com> 
	<89d8b1b01003111307r37c5c11cre334d455cdcf9313@mail.gmail.com> 
	<34f468871003111313t7758016dgcc3cbdc29c66d459@mail.gmail.com>
Message-ID: <7ec143011003111317q487c7aadsf8cc3ea4d28e31fc@mail.gmail.com>

G'Bless you E!  = )
 -Nick

On Thu, Mar 11, 2010 at 4:13 PM, Eric Floehr <eric at intellovations.com>wrote:

> On Thu, Mar 11, 2010 at 4:07 PM, Brian Costlow <brian.costlow at gmail.com>wrote:
>
>> forgot to reply all on this..so forwarding to the group
>>
>>
>
> Ok, practicality wins out over academic purity of email headers.  I've
> switched centraloh reply-to to go to the list rather than poster.  We all
> can benefit from replies to this list...this isn't an announcement list or
> what-not, but a discussion board.
>
> No more forgetting to "reply-all" :-).
>
> -Eric
>
>
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> http://mail.python.org/mailman/listinfo/centraloh
>
>


-- 
Please note that as of 1/20 I no longer have a land phone line, only my
cell.
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From brian.costlow at gmail.com  Fri Mar 12 01:49:12 2010
From: brian.costlow at gmail.com (Brian Costlow)
Date: Thu, 11 Mar 2010 19:49:12 -0500
Subject: [CentralOH] Fwd: Files and context manager
In-Reply-To: <34f468871003111313t7758016dgcc3cbdc29c66d459@mail.gmail.com>
References: <077B3F36-43B9-446F-BBDC-10518D6FF5C8@microenh.com>
	<3C60935B-9162-4B9E-ADE3-D72A831398E8@microenh.com>
	<89d8b1b01003101434r6812d707he6ae967036f4b3c0@mail.gmail.com>
	<EA55D66F-047F-4B3C-90F1-59A5FB9532F2@microenh.com>
	<89d8b1b01003111255t70b98566x98415164e4e11a15@mail.gmail.com>
	<89d8b1b01003111307r37c5c11cre334d455cdcf9313@mail.gmail.com>
	<34f468871003111313t7758016dgcc3cbdc29c66d459@mail.gmail.com>
Message-ID: <89d8b1b01003111649s5c20158awfe9dcbfbea85e356@mail.gmail.com>

It's that clumsy gmail reply-all interface that got me :-(

On Thu, Mar 11, 2010 at 4:13 PM, Eric Floehr <eric at intellovations.com> wrote:
> On Thu, Mar 11, 2010 at 4:07 PM, Brian Costlow <brian.costlow at gmail.com>
> wrote:
>>
>> forgot to reply all on this..so forwarding to the group
>>
>
>
> Ok, practicality wins out over academic purity of email headers.? I've
> switched centraloh reply-to to go to the list rather than poster.? We all
> can benefit from replies to this list...this isn't an announcement list or
> what-not, but a discussion board.
>
> No more forgetting to "reply-all" :-).
>
> -Eric
>
>

From mark at microenh.com  Thu Mar 18 17:36:48 2010
From: mark at microenh.com (Mark Erbaugh)
Date: Thu, 18 Mar 2010 12:36:48 -0400
Subject: [CentralOH] Python Programmable PDA
Message-ID: <C75954C8-6AEE-4C37-9202-C296FDCFBE9C@microenh.com>

I'm thinking of replacing my Palm Z22 PDA. Are there any current PDA's where I can run Python apps?  I'd like to write a couple of small database data entry type apps for tracking stuff.

Thanks,
Mark

From josh at globalherald.net  Thu Mar 18 19:46:33 2010
From: josh at globalherald.net (Joshua Kramer)
Date: Thu, 18 Mar 2010 14:46:33 -0400 (EDT)
Subject: [CentralOH] Python Programmable PDA
In-Reply-To: <C75954C8-6AEE-4C37-9202-C296FDCFBE9C@microenh.com>
References: <C75954C8-6AEE-4C37-9202-C296FDCFBE9C@microenh.com>
Message-ID: <alpine.LFD.2.00.1003181444210.10708@home-av-server.home-av>


There are a few tablets coming out that run Android... and if I remember 
correctly, there's a kit that allows you to write Android Apps in Python:

http://code.google.com/p/android-scripting/

I'm not sure if there are any non-phone Android devices that also contain 
a hardware keyboard, however.

On Thu, 18 Mar 2010, Mark Erbaugh wrote:

> Date: Thu, 18 Mar 2010 12:36:48 -0400
> From: Mark Erbaugh <mark at microenh.com>
> Reply-To: "Mailing list for Central Ohio Python User Group (COhPy)"
>     <centraloh at python.org>
> To: centraloh <centraloh at python.org>
> Subject: [CentralOH] Python Programmable PDA
> 
> I'm thinking of replacing my Palm Z22 PDA. Are there any current PDA's where I can run Python apps?  I'd like to write a couple of small database data entry type apps for tracking stuff.
>
> Thanks,
> Mark
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> http://mail.python.org/mailman/listinfo/centraloh
>

-- 

-----
http://www.globalherald.net/jb01
GlobalHerald.NET, the Smarter Social Network! (tm)

From douglas.m.stanley at gmail.com  Thu Mar 18 17:45:29 2010
From: douglas.m.stanley at gmail.com (Douglas Stanley)
Date: Thu, 18 Mar 2010 12:45:29 -0400
Subject: [CentralOH] Python Programmable PDA
In-Reply-To: <C75954C8-6AEE-4C37-9202-C296FDCFBE9C@microenh.com>
References: <C75954C8-6AEE-4C37-9202-C296FDCFBE9C@microenh.com>
Message-ID: <be41fff51003180945r4af6d81dj8e35bc3365af2907@mail.gmail.com>

nokia n800/n810/n900...not really "PDA"'s per se...in fact the 900 is
a full fledged phone too I think, and
a bit pricey (~$500-600). The n810/800 is reasonably priced
though...but from personal experience, they're
a bit heavy (actual weight). Not something you want in your pocket all day.

Android phones have the ASE (android scripting environment).

Are the zaurus' (zaurii) still around?

I'd love to see a hackable small device/pda that runs python well. For
now, android phone is my fav (just don't
try editing a large script with the virtual keyboard).

Doug

On Thu, Mar 18, 2010 at 12:36 PM, Mark Erbaugh <mark at microenh.com> wrote:
> I'm thinking of replacing my Palm Z22 PDA. Are there any current PDA's where I can run Python apps? ?I'd like to write a couple of small database data entry type apps for tracking stuff.
>
> Thanks,
> Mark
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> http://mail.python.org/mailman/listinfo/centraloh
>



-- 
Please avoid sending me Word or PowerPoint attachments.
See http://www.gnu.org/philosophy/no-word-attachments.html

From eric at intellovations.com  Thu Mar 18 23:50:51 2010
From: eric at intellovations.com (Eric Floehr)
Date: Thu, 18 Mar 2010 18:50:51 -0400
Subject: [CentralOH] Python One-Line web server
Message-ID: <34f468871003181550i45f41709h439d0ddd3606c3e@mail.gmail.com>

Saw this on "Top Ten One-Liners From CommandLineFu Explained":

http://www.catonmat.net/blog/top-ten-one-liners-from-commandlinefu-explained/

If you want a simple web server to serve up the documents in a particular
directory, for testing or whatever, you can simply do:

# python -m SimpleHTTPServer

It will attach to port 80 on all interfaces (not just localhost).  You can
specify the port by appending the port like:

# python -m SimpleHTTPServer 8080


You can do this yourself so long as your module is on the PYTHONPATH and
your module does something when run in that manner.  You can do that by
having the following in your file:

if __name__ == '__main__':
    ...stuff to do (oftentimes it's call a function)...

The special variable __name__ is usually set to the name of the module (i.e.
"SimpleHTTPServer").  However, when started from the command line, the
module works as if it was imported (all initialization code runs, etc.) but
the __name__ variable is set to "__main__".

If the PYTHONPATH is not set, it is generally the current directory and the
standard python library directory (like /usr/lib/python2.6).  Also, if you
want to execute a python file in the current directory, you don't need the
"-m".  Without the -m, the python interpreter will execute a file, not a
module.

Best Regards,
Eric
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From eric at intellovations.com  Fri Mar 19 19:54:22 2010
From: eric at intellovations.com (Eric Floehr)
Date: Fri, 19 Mar 2010 14:54:22 -0400
Subject: [CentralOH] Google's Python Class
Message-ID: <34f468871003191154r1fc9e039ge7765b750d96ad4a@mail.gmail.com>

Google uses Python quite a bit, and they have a training class for its
employees who are unfamiliar with it.  Google has generously made the class
training and material available for all.  Here is the description:

Welcome to Google's Python Class -- this is a free class for people with a
little bit of programming experience who want to learn Python. The class
includes written materials, lecture videos, and lots of code exercises to
practice Python coding. These materials are used within Google to introduce
Python to people who have just a little programming experience. The first
exercises work on basic Python concepts like strings and lists, building up
to the later exercises which are full programs dealing with text files,
processes, and http connections. The class is geared for people who have a
little bit of programming experience in some language, enough to know what a
"variable" or "if statement" is. Beyond that, you do not need to be an
expert programmer to use this material.
The link to the course is here:

http://code.google.com/edu/languages/google-python-class/

Best Regards,
Eric
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From eric at intellovations.com  Wed Mar 24 22:16:24 2010
From: eric at intellovations.com (Eric Floehr)
Date: Wed, 24 Mar 2010 17:16:24 -0400
Subject: [CentralOH] Volunteers Needed for May Meeting
Message-ID: <34f468871003241416x3caec870s11f9ac472652ea33@mail.gmail.com>

All,

I would like to do something different for our May meeting in two
months.  Instead of a single speaker, I'd like to have a laptops-open,
hands-on meeting.  Basically, I'd like two to five volunteers to walk
through a Python component (library, module, third-party API, etc.)
from the basics to a program that does something.  It doesn't have to
be anything fancy, but by the end someone should have gotten their
feet wet and understand how to use that particular component.

It could be a component you are very familiar with and use often, or a
cool component you have discovered, or, one that you'd like to learn
more about (getting together a short talk to teach someone else is
often the best way to learn!).  Some examples of the types of things
that could be interesting:

1. Using lxml or BeautifulSoup or etc. to scrape a web page
2. Creating a TwitterBot
3. Creating a UI that graphs some data
4. ???

The goal would be to work up to the app, so that when done, the
audience would feel comfortable taking the next step with the app...so
a little more than just a line-by-line explanation of the app.

Suggestions? Anyone interested?

Best Regards,
Eric

From miles.groman at gmail.com  Thu Mar 25 01:27:55 2010
From: miles.groman at gmail.com (m g)
Date: Wed, 24 Mar 2010 20:27:55 -0400
Subject: [CentralOH] Volunteers Needed for May Meeting
In-Reply-To: <34f468871003241416x3caec870s11f9ac472652ea33@mail.gmail.com>
References: <34f468871003241416x3caec870s11f9ac472652ea33@mail.gmail.com>
Message-ID: <fa5f8d571003241727s69f1ffe2j119994117dc1a157@mail.gmail.com>

Im about halfway through that Learning Python book, so I am sure I can
come up with something.

From ericlake at gmail.com  Thu Mar 25 02:45:22 2010
From: ericlake at gmail.com (Eric Lake)
Date: Wed, 24 Mar 2010 21:45:22 -0400
Subject: [CentralOH] Volunteers Needed for May Meeting
In-Reply-To: <34f468871003241416x3caec870s11f9ac472652ea33@mail.gmail.com>
References: <34f468871003241416x3caec870s11f9ac472652ea33@mail.gmail.com>
Message-ID: <4BAAC032.2060109@gmail.com>

On 03/24/2010 05:16 PM, Eric Floehr wrote:
> All,
> 
> I would like to do something different for our May meeting in two
> months.  Instead of a single speaker, I'd like to have a laptops-open,
> hands-on meeting.  Basically, I'd like two to five volunteers to walk
> through a Python component (library, module, third-party API, etc.)
> from the basics to a program that does something.  It doesn't have to
> be anything fancy, but by the end someone should have gotten their
> feet wet and understand how to use that particular component.
> 
> It could be a component you are very familiar with and use often, or a
> cool component you have discovered, or, one that you'd like to learn
> more about (getting together a short talk to teach someone else is
> often the best way to learn!).  Some examples of the types of things
> that could be interesting:
> 
> 1. Using lxml or BeautifulSoup or etc. to scrape a web page
> 2. Creating a TwitterBot
> 3. Creating a UI that graphs some data
> 4. ???
> 
> The goal would be to work up to the app, so that when done, the
> audience would feel comfortable taking the next step with the app...so
> a little more than just a line-by-line explanation of the app.
> 
> Suggestions? Anyone interested?
> 
> Best Regards,
> Eric
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> http://mail.python.org/mailman/listinfo/centraloh
If only I lived in Ohio :/

Please post how this turns out. I may see if I can replicate it within
my LUG.

-- 
Thanks.

Eric Lake

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From nludban at osc.edu  Thu Mar 25 17:50:45 2010
From: nludban at osc.edu (Neil Ludban)
Date: Thu, 25 Mar 2010 12:50:45 -0400
Subject: [CentralOH] Volunteers Needed for May Meeting
In-Reply-To: <34f468871003241416x3caec870s11f9ac472652ea33@mail.gmail.com>
References: <34f468871003241416x3caec870s11f9ac472652ea33@mail.gmail.com>
Message-ID: <2D8C93C5-4F39-47F9-BB4D-57039516DF46@osc.edu>

On Mar 24, 2010, at 5:16 PM, Eric Floehr wrote:
> 
> I would like to do something different for our May meeting in two
> months.  Instead of a single speaker, I'd like to have a laptops-open,
> hands-on meeting.  Basically, I'd like two to five volunteers to walk
> through a Python component (library, module, third-party API, etc.)
> from the basics to a program that does something.  It doesn't have to
> be anything fancy, but by the end someone should have gotten their
> feet wet and understand how to use that particular component.

Any interest in "Network Programming the Hard Way" using socket,
os, select, and threading?  Basically just translating some of the
examples from Stevens' APUE and Unix Network Programming books from
C to Python, although I can't guarantee everything would work under
Windows given my other time commitments.


From mark at microenh.com  Thu Mar 25 18:51:33 2010
From: mark at microenh.com (Mark Erbaugh)
Date: Thu, 25 Mar 2010 13:51:33 -0400
Subject: [CentralOH] Volunteers Needed for May Meeting
In-Reply-To: <34f468871003241416x3caec870s11f9ac472652ea33@mail.gmail.com>
References: <34f468871003241416x3caec870s11f9ac472652ea33@mail.gmail.com>
Message-ID: <C9BE0CD6-44B0-4E55-8F27-E6C3B4A3444E@microenh.com>


On Mar 24, 2010, at 5:16 PM, Eric Floehr wrote:

> All,
> 
> I would like to do something different for our May meeting in two
> months.  Instead of a single speaker, I'd like to have a laptops-open,
> hands-on meeting.  Basically, I'd like two to five volunteers to walk
> through a Python component (library, module, third-party API, etc.)
> from the basics to a program that does something.  It doesn't have to
> be anything fancy, but by the end someone should have gotten their
> feet wet and understand how to use that particular component.
> 
> It could be a component you are very familiar with and use often, or a
> cool component you have discovered, or, one that you'd like to learn
> more about (getting together a short talk to teach someone else is
> often the best way to learn!).  Some examples of the types of things
> that could be interesting:
> 
> 1. Using lxml or BeautifulSoup or etc. to scrape a web page
> 2. Creating a TwitterBot
> 3. Creating a UI that graphs some data
> 4. ???
> 
> The goal would be to work up to the app, so that when done, the
> audience would feel comfortable taking the next step with the app...so
> a little more than just a line-by-line explanation of the app.
> 
> Suggestions? Anyone interested?
> 
> Best Regards,
> Eric

When is the May meeting?  I'm unavailable through the 16th, but assuming the meeting is later in the month, I could present something on using SQLAlchemy and SQLITE3.

Mark

From rtfm at columbus.rr.com  Thu Mar 25 19:33:54 2010
From: rtfm at columbus.rr.com (Mike Schoenborn)
Date: Thu, 25 Mar 2010 14:33:54 -0400
Subject: [CentralOH] Volunteers Needed for May Meeting
In-Reply-To: <2D8C93C5-4F39-47F9-BB4D-57039516DF46@osc.edu>
References: <34f468871003241416x3caec870s11f9ac472652ea33@mail.gmail.com>
	<2D8C93C5-4F39-47F9-BB4D-57039516DF46@osc.edu>
Message-ID: <1269542034.13001.3.camel@egg>

On Thu, 2010-03-25 at 12:50 -0400, Neil Ludban wrote:
> Any interest in "Network Programming the Hard Way" using socket,
> os, select, and threading?

Absolutely. The "batteries NOT included" approach always catches my
attention.



From eric at intellovations.com  Fri Mar 26 14:29:29 2010
From: eric at intellovations.com (Eric Floehr)
Date: Fri, 26 Mar 2010 09:29:29 -0400
Subject: [CentralOH] PyMOTW turns 3
Message-ID: <34f468871003260629l42a48de3qee2644d5d65541b7@mail.gmail.com>

http://blog.doughellmann.com/2010/03/pymotw-turns-3.html

"The Python Module of the Week series started March 25, 2007 as a
personal challenge to learn more about the Python standard library.
Since that time, it has grown into something bigger than I ever
expected. The series now includes 149 articles with example code
showing how to use different parts of the Python standard library. The
latest release of the collection includes examples for 119 modules and
the PDF version spans 670 pages."

The PDF can be downloaded here:
http://www.doughellmann.com/PyMOTW/PyMOTW-1.117.pdf

Best Regards,
Eric

From scott.scites at railcar88.com  Sat Mar 27 15:20:11 2010
From: scott.scites at railcar88.com (Scott Scites)
Date: Sat, 27 Mar 2010 10:20:11 -0400
Subject: [CentralOH] CentralOH Digest, Vol 35, Issue 7
In-Reply-To: <mailman.19.1269687603.7792.centraloh@python.org>
References: <mailman.19.1269687603.7792.centraloh@python.org>
Message-ID: <t2w8afa282d1003270720n118ecce1w3485c11356744570@mail.gmail.com>

Eric and All,
Additionally, I noticed Brian Jones (@bkjones) is starting a PyTPMOTW series
for third party python apps.
http://www.protocolostomy.com/2010/03/26/pytpmotw-first-post/

<http://www.protocolostomy.com/2010/03/26/pytpmotw-first-post/>Also, there
is a new podcast coming soon from our Python brothers at clepy, Dave Stanek
(@dstanek), Chris Miller (@codeshaman) and Mike Crute (@mcrute) called,
"From Python Import Podcast":
http://www.unquietdesperation.com/2010/03/24/from-python-import-podcast/

Exciting times!

Scott Scites
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From amonroe at columbus.rr.com  Sun Mar 28 17:25:15 2010
From: amonroe at columbus.rr.com (R. Alan Monroe)
Date: Sun, 28 Mar 2010 11:25:15 -0400
Subject: [CentralOH] http://pyweek.org/10/
Message-ID: <196349904005.20100328112515@columbus.rr.com>


http://pyweek.org/10/ begins today, Sun Mar 28.

Alan


From miles.groman at gmail.com  Mon Mar 29 15:56:49 2010
From: miles.groman at gmail.com (m g)
Date: Mon, 29 Mar 2010 09:56:49 -0400
Subject: [CentralOH] CentralOH Digest, Vol 35, Issue 7
In-Reply-To: <t2w8afa282d1003270720n118ecce1w3485c11356744570@mail.gmail.com>
References: <mailman.19.1269687603.7792.centraloh@python.org>
	<t2w8afa282d1003270720n118ecce1w3485c11356744570@mail.gmail.com>
Message-ID: <fa5f8d571003290656l1daaae2aj315c95a95e91aac7@mail.gmail.com>

Clever podcast name, I like

On Sat, Mar 27, 2010 at 10:20 AM, Scott Scites
<scott.scites at railcar88.com> wrote:
> Eric and All,
> Additionally, I noticed Brian Jones (@bkjones) is starting a PyTPMOTW series
> for third party python apps.
> http://www.protocolostomy.com/2010/03/26/pytpmotw-first-post/
> Also, there is a new podcast coming soon from our Python brothers at clepy,
> Dave Stanek (@dstanek), Chris Miller (@codeshaman) and Mike Crute (@mcrute)
> called, "From Python Import Podcast":
> http://www.unquietdesperation.com/2010/03/24/from-python-import-podcast/
> Exciting times!
> Scott Scites
>
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> http://mail.python.org/mailman/listinfo/centraloh
>
>

From godber at gmail.com  Tue Mar 30 05:03:12 2010
From: godber at gmail.com (Austin Godber)
Date: Mon, 29 Mar 2010 21:03:12 -0600
Subject: [CentralOH] Great Meeting, Python Koans
Message-ID: <50c31cc41003292003t51a7416fw844a77440853b30@mail.gmail.com>

Hello Everyone,
I wanted to send and email saying that tonights meeting was great and I look
forward to the next one I can attend.

Also, I wanted to ask Greg, if he's on the list, what the URL to his python
koans are, but then I thought to google it and found it here:

http://bitbucket.org/gregmalcolm/python_koans/overview/

for those interested in trying them.

Hopefully I will see everyone next month.

Austin
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From miles.groman at gmail.com  Tue Mar 30 15:21:21 2010
From: miles.groman at gmail.com (m g)
Date: Tue, 30 Mar 2010 09:21:21 -0400
Subject: [CentralOH] Great Meeting, Python Koans
In-Reply-To: <50c31cc41003292003t51a7416fw844a77440853b30@mail.gmail.com>
References: <50c31cc41003292003t51a7416fw844a77440853b30@mail.gmail.com>
Message-ID: <fa5f8d571003300621l3581a1e8w8d5301c6f23f87c3@mail.gmail.com>

I agree, one of the best meetings we have had.

From wm.melvin at gmail.com  Wed Mar 31 16:15:04 2010
From: wm.melvin at gmail.com (William Melvin)
Date: Wed, 31 Mar 2010 10:15:04 -0400
Subject: [CentralOH] Resolver One
Message-ID: <y2z5ed15f101003310715v488736d2ra0a2ba5094f969bb@mail.gmail.com>

If you're interested in a Python-powered spreadsheet you might want
check out Resolver One. They're having a special today.

http://www.resolversystems.com

"On 31 March, for one day only, we are selling full commercial
licenses for Resolver One 1.8 for $40..."

Found out about this via a RT from one of the Resolver Systems devs,
Michael Foord  http://twitter.com/voidspace

I've been wanting to check this out since I heard about it in an
interview with Michael on the Hanselminutes podcast.

http://www.hanselminutes.com/default.aspx?showID=177


-Bill Melvin

From eric at intellovations.com  Wed Mar 31 20:23:43 2010
From: eric at intellovations.com (Eric Floehr)
Date: Wed, 31 Mar 2010 14:23:43 -0400
Subject: [CentralOH] Python Teaching Volunteers Needed
Message-ID: <x2l34f468871003311123t20cb4d62oeb98f02b2b01f09d@mail.gmail.com>

John Langkals of Explorers Post 891 asked me to forward this request
on.  His organization is looking for OSU students or others who would
be interested in teaching High School students Python.

They meet at OSU Hitchcock Hall every Wednesday from 7pm to 9:30pm.
Instructors can go early as needed.

If you are interested you can contact John at: 327.3732 or langkals.1 at osu.edu

More details from John follow:

Over the past thirty years we have been involved in an outstanding
career educational organization open to area high school students. We
would like to approach the OSU Open Source Club and the Central Ohio
Python Users Group with the possibility of finding a few individuals
interested in volunteering teaching Python to area high school
students.  We are currently hosted by the OSU Department of
Engineering and have access to a computer lab.

As a computer post, our teaching focuses on the UNIX operating system.
The first class series, Beginning Unix, is an introduction to
navigating the command line and Bash shell scripting. Then there is an
end-of-class exam the students must pass in order to continue. The
second class series is usually systems administration, web design, or
a programming class like Java. In the past, we have held a
microprocessors, C programming, ruby, and other classes. After the
introductory program, class selection is a very interactive process,
with the students providing input on topics they would like to learn.
In the past, the students were interested in learning basic robotics
and game programming.

Our post usually meets every Wednesday from 7 to 9:30pm. It's an
awesome time and a lot of fun for an outstanding cause. Let me know
what you think.

Thank you,
John

From eric at intellovations.com  Wed Mar 31 20:34:31 2010
From: eric at intellovations.com (Eric Floehr)
Date: Wed, 31 Mar 2010 14:34:31 -0400
Subject: [CentralOH] PyOhio 2010!
Message-ID: <r2h34f468871003311134m902d3374ldfd940a4d4579bff@mail.gmail.com>

All,

PyOhio 2010 planning is kicking into gear.  If anyone is interested in
helping out (as little or as much as you'd like) please let me know!
There is a Staff page at the wiki:

http://wiki.python.org/moin/PyOhio/Staff

if there are particular areas or interests or skills you'd like to
volunteer.  Even if a box is filled, if you are interested there will
be things for you to help with.

PyOhio was a resounding success last year, attracting folks from
throughout the Midwest.

Additionally, the official call for talks will go out tomorrow, so if
you are interested in submitting a talk proposal, leading/organizing a
panel discussion, or teaching a segment of a beginner's track, start
thinking about what you'd like to do.

Please let me know if you are interested in helping out.

Or, if you are interested in attending PyOhio, make sure you are a
subscriber to the PyOhio mailing list:
http://mail.python.org/mailman/listinfo/pyohio  There you will receive
announcements, notices, and other info about the PyOhio conference.

Best Regards,
Eric

From eric at intellovations.com  Wed Mar 31 20:44:26 2010
From: eric at intellovations.com (Eric Floehr)
Date: Wed, 31 Mar 2010 14:44:26 -0400
Subject: [CentralOH] COhPy May Meeting
Message-ID: <x2y34f468871003311144i651d2712u9bb32c2fa50b6a2@mail.gmail.com>

All,

The May meeting of COhPy will be a "hands-on" meeting, with a few 20
minute zero-to-simple-working-app presentations on various topics.
The meeting will be on Monday, May 24.

We've had three volunteers to present.  If you are interested, but
haven't yet emailed, please do!  If it turns out well, we'll certainly
do it again!

Here are the topics that have been proposed:

Miles Groman -- something
Neil Ludban -- Network Programming the Hard Way
Mark Erbaugh -- SQLAlchemy and SQLITE3

Did I miss anyone?  If not, this will be our lineup, which looks really strong.

Best Regards,
Eric