From mboxrd@z Thu Jan  1 00:00:00 1970
From: Torsten Wagner <torsten.wagner@gmail.com>
Subject: Re: Wish: babel for python3
Date: Tue, 18 Oct 2011 17:56:25 +0900
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To: Arne Babenhauserheide <arne_bab@web.de>
Cc: emacs-orgmode@gnu.org

Hi,
(sorry Arne for the eventual double post, I forogot to attt the mailing 
list)

>>>> Is there a way to get python3 support for Babel into org-mode
>>>> cleanly?


>> Something like:
>> -*- org-babel-python-command: "python3"


alternatively (a trick Eric is never tired to mention to me ) you could 
add a little lisp block which change all kind of language related 
aspects for you. This could include many more options and modify your 
emacs environment just to your personal needs for a certain language.

Make one for python2 and one for python3 and execute them dependent on 
which system you are going to use.

Without testing and without guarantee it should be something like the 
below code. To demonstrate some more functionality lets change the 
modebar background colour to make it more visible which python mode you 
are currently using.


#+srcname: python2_env
#+begin_src emacs-lisp
  (setq org-babel-python-command "python")
  (set-face-background 'modeline "#4477aa")
#+end_src

#+srcname: python3_env
#+begin_src emacs-lisp
  (setq org-babel-python-command "python3")
  (set-face-background 'modeline "#771944")
#+end_src

Sure both could be done with file bounded variables too. But know you 
can switch between both environments within the same buffer, e.g., to 
check if the code runs on both python versions

Regards

Totti