Re: Buffer-wide definitions in org-babel

From: "Eric Schulte" <schulte.eric@gmail.com>
To: Juan Reyero <joanmg@gmail.com>
Cc: emacs-orgmode@gnu.org
Subject: Re: Buffer-wide definitions in org-babel
Date: Wed, 07 Oct 2009 12:48:40 -0600	[thread overview]
Message-ID: <m2ocojavlj.fsf@gmail.com> (raw)
In-Reply-To: <55bd243d0910070720i3085af58xc30cf14011d6375a@mail.gmail.com> (Juan Reyero's message of "Wed, 7 Oct 2009 16:20:04 +0200")

Juan Reyero <joanmg@gmail.com> writes:

> Greetings,
>

Hi,

>
> I am trying to define buffer-wide initializations in org-babel, so that I can import a python module once
> and then use its exported symbols in all the code chunks throughout the buffer.  Is there a way to do it?
>  I have tried all the obvious approaches and none seems to work.  (My hope was that I could define a
> :session and then use it in every chunk, but python doesn't like it). 
>

I believe you are on the right track by trying to use sessions.  The
following works for me

--8<---------------cut here---------------start------------->8---
** persistent python
#+begin_src python :session :results silent
  import types
#+end_src

#+begin_src python :session
  types.FunctionType
#+end_src

#+resname:
: function
--8<---------------cut here---------------end--------------->8---

Of if you grab the latest version of Org-mode from the git repo you can
set the session type in a headline property which would be more similar
to the file-wide behavior that you described.

--8<---------------cut here---------------start------------->8---
*** more persistent python
    :PROPERTIES:
    :session:  default
    :END:

#+begin_src python :results silent
  import types
#+end_src

#+begin_src python
  types.FunctionType
#+end_src

#+resname:
: function
--8<---------------cut here---------------end--------------->8---

please let me know if the above don't work for you, or if you are
encountering some other python-babel issues.

>
> I just found out about org-babel, and I am delighted by its promise.

Thanks! I hope it lives up it's promise.

Best -- Eric

> Org-mode has changed the way I work (after a year and a half I could
> not live without it) but now I think this is going to be another bit
> step. 
>
> Many thanks,
>
> jm
> --
> http://juanreyero.com/blog
>
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