From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Schulte <schulte.eric@gmail.com>
Subject: Re: Fwd: run python from org, draft
Date: Fri, 29 Mar 2013 09:09:08 -0600
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	(John Hendy's message of "Fri, 29 Mar 2013 09:57:54 -0500")
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To: John Hendy <jw.hendy@gmail.com>
Cc: emacs-orgmode <emacs-orgmode@gnu.org>, Gary Oberbrunner <garyo@oberbrunner.com>

>> with current
>>
>> GNU Emacs 24.3.1 (i686-pc-linux-gnu, GTK+ Version 2.24.14) of 2013-03-05
>>
>> Org-mode version 7.9.3f (release_7.9.3f-17-g7524ef @
>> MY_PATH/emacs-24.3/lisp/org/)
>>
>> python from org-source seems completely broken.
>>
>> For example:
>>
>> #+BEGIN_SRC python
>> 1+2
>> #+END_SRC
>>
>> #+RESULTS:
>> : None
>>
>>
> Weird. With all the testing we did last week, I'm surprised that this is
> the case with me as well. I'm also getting no results with Org 8.0-pre and
> Emacs 24.3.1.
>

Because of quirks of the python language, when executing outside of a
session, it is necessary to explicitly specify a return.

For example.

    #+begin_src python
      return 1+2
    #+end_src

    #+RESULTS:
    : 3

or

    #+begin_src python :return x
      x = 1+2
    #+end_src

    #+RESULTS:
    : 3

This is clearly stated in the Python documentation on Worg.
http://orgmode.org/worg/org-contrib/babel/languages/ob-doc-python.html

Thanks,

-- 
Eric Schulte
http://cs.unm.edu/~eschulte