From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ken Mankoff <mankoff@gmail.com>
Subject: Re: python :session does return
Date: Tue, 14 Jan 2014 10:34:06 -0500 (EST)
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On Tue, 14 Jan 2014, Ken Mankoff wrote:

>
> I've seen various historical issues with :session but it seems I may have a 
> different problem. This is the latest org in emacs 24.3. If I do not have 
> :session, then everything works just fine.
>
> If I C-c C-c in the following code:
>
> #+BEGIN_SRC python :session transect
> import numpy as np
> x = np.arange(12)
> #+END_SRC
>
> Emacs hangs the first time with minibuffer message of "Sent 
> python-eldoc-setup-code". If I C-g, I can edit the org buffer again. All 
> other invocations of that code and the minibuffer message is "executing 
> Python code block...", but still emacs hangs until I C-g.
>


Hmm. If I run IPython instead of regular python by setting this:
(setq org-babel-python-command "ipython --pylab --pdb --nosep")

Then org does not hang. It returns as expected. However, the 
capturing of output doesn't seem to work right.

In Org, the following:

#+begin_src python :session foo
x = 42
print x
#+end_src

Produces no RESULTS, and in the Python *foo* buffer I see:

In [8]: x = 42
In [9]: print x
42
In [10]: open('/var/folders/60/jb7kfrsn2jd90hpcgj4m_wrc0000gn/T/babel-35562TZV/python-3$
In [11]: 'org_babel_python_eoe'
Out[11]: 'org_babel_python_eoe'


But if I remove the "print" statment in Org:

#+begin_src python :session foo
x = 42
x
#+end_src

Then the RESULTS shows me 42, and the Python *foo* buffer is:

In [12]: x = 42
In [13]: x
Out[13]: 42
In [14]: open('/var/folders/60/jb7kfrsn2jd90hpcgj4m_wrc0000gn/T/babel-35562TZV/python-3$
In [15]: 'org_babel_python_eoe'
In [15]: Out[15]: 'org_babel_python_eoe'