From mboxrd@z Thu Jan  1 00:00:00 1970
From: Myles English <myles.english@ed.ac.uk>
Subject: wrong python version with :session
Date: Mon, 05 Sep 2011 17:00:13 +0100
Message-ID: <87sjobvv1u.fsf@bill.home>
Reply-To: emacs-orgmode@gnu.org
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([140.186.70.92]:49767)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <myles.english@ed.ac.uk>) id 1R0baH-00006D-A3
	for emacs-orgmode@gnu.org; Mon, 05 Sep 2011 11:59:42 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <myles.english@ed.ac.uk>) id 1R0baF-0000w1-NJ
	for emacs-orgmode@gnu.org; Mon, 05 Sep 2011 11:59:41 -0400
Received: from treacle.ucs.ed.ac.uk ([129.215.16.102]:49666)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <myles.english@ed.ac.uk>) id 1R0baF-0000vE-Fk
	for emacs-orgmode@gnu.org; Mon, 05 Sep 2011 11:59:39 -0400
Received: from lmtp2.ucs.ed.ac.uk (lmtp2.ucs.ed.ac.uk [129.215.149.71])
	by treacle.ucs.ed.ac.uk (8.13.8/8.13.4) with ESMTP id p85FxGOa017066
	for <emacs-orgmode@gnu.org>; Mon, 5 Sep 2011 16:59:21 +0100 (BST)
Received: from localhost (host86-131-170-201.range86-131.btcentralplus.com
	[86.131.170.201]) (authenticated user=s0897681 mech=PLAIN bits=0)
	by lmtp2.ucs.ed.ac.uk (8.13.8/8.13.7) with ESMTP id p85FxE1q020592
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT)
	for <emacs-orgmode@gnu.org>; Mon, 5 Sep 2011 16:59:15 +0100 (BST)
Content-Disposition: inline
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=unsubscribe>
List-Archive: </archive/html/emacs-orgmode>
List-Post: <mailto:emacs-orgmode@gnu.org>
List-Help: <mailto:emacs-orgmode-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=subscribe>
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
To: emacs-orgmode@gnu.org

Hello,

When a python source block has a :session header argument, the python
version selected does not appear to respect the value of the variable
org-babel-python-command.

In my .emacs:

(require 'org-install)

(org-babel-do-load-languages
 'org-babel-load-languages
 '((python . t) ))

(setq org-babel-python-command "python2")

In my org file:

#+begin_src python :results output
import sys
print(sys.version)
#+end_src

#+results:
: 2.7.2 (default, Jun 29 2011, 11:10:00) 
: [GCC 4.6.1]

Now exactly the same but with ":session x" header argument:

#+begin_src python :results output :session x
import sys
print(sys.version)
#+end_src

#+results:
: 
: 3.2.1 (default, Jul 11 2011, 12:37:47) 
: [GCC 4.6.1]

So babel has chosen to use Python 3.2 When I wanted to use Python 2.7,
as in the first block, and the value of org-babel-python-command is
still "python2".

Versions:

orgmode commit cae9f947be (Aug 30th)
GNU Emacs 23.3.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.22.1) of 2011-03-10 on bitzer.hoetzel.info

$ ls -l `which python{2,3,}`
/usr/bin/python -> python3
/usr/bin/python2 -> python2.7
/usr/bin/python3

Am I doing something wrong or is this a bug?

Thanks,

Myles

-- 
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.