Re: session with python-mode.el complains of void py-toggle-shells

[Nick Dokos <nicholas.dokos@hp.com>]

Myles English <mylesenglish@gmail.com> wrote:

> Hi,
> 
> I think it should be possible to execute a python block in a session
> using python-mode.el but get this message:
> 
> "Symbol's function definition is void: py-toggle-shells"
> 
> Using the latest git head and opening this file with:
> 
> $ emacs -Q thisfile.org
> 
> then executing these src blocks in order, shows the problem:
> 
> #+BEGIN_SRC emacs-lisp
>   (require 'org)
>   (org-babel-do-load-languages
>    'org-babel-load-languages
>    '((python . t)))
> #+END_SRC
> 
> #+RESULTS:
> | (python . t) |
> 
> * A heading
> 
> This works okay:
> 
> #+begin_src python :results output :session a
> import sys
> #+end_src
> 
> #+RESULTS:
> 
> Try with python3:
> 
> #+begin_src elisp
> (setq org-babel-python-command "python3"
>       py-python-command "python3"
> )
> #+end_src
> 
> #+RESULTS:
> : python3
> 
> works also:
> 
> #+begin_src python :results output :session a
> import sys
> #+end_src
> 
> #+RESULTS:
> 
> Try using python-mode.el:
> 
> #+begin_src elisp
> (setq org-babel-python-mode 'python-mode)
> (load-file "/usr/share/emacs/site-lisp/python-mode.el")
> #+end_src
> 
> #+RESULTS:
> : t
> 
> #+begin_src python :results output :session a
> import sys
> #+end_src
> 
> Gives this *Message*:
> 
> org-babel-python-initiate-session-by-key: Symbol's function definition
> is void: py-toggle-shells
> 
> Do I need to configure something else?
> 

I get in trouble much sooner than you do: when evaluating the first code
block.  The error in my case was that run-python was called with the
wrong number of args (from the same function: it's a couple of lines
before py-toggle-shells is called). I'm running

GNU Emacs 24.3.50.2 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.4) of 2012-12-29

and run-python does indeed need a required arg in this version:

,----
| run-python is an interactive autoloaded compiled Lisp function in
| `python.el'.
| 
| (run-python CMD &optional DEDICATED SHOW)
| 
| Run an inferior Python process.
| Input and output via buffer named after
| `python-shell-buffer-name'.  If there is a process already
| running in that buffer, just switch to it.
`----

So I changed the call to


 	(run-python py-python-command)

and then all the code blocks could execute with no problem. Has
run-python changed signature recently?

This may or may not be the problem you are running into however.

Nick