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Re: [Orgmode] Buffer-wide definitions in org-babel
From: |
Juan Reyero |
Subject: |
Re: [Orgmode] Buffer-wide definitions in org-babel |
Date: |
Thu, 8 Oct 2009 11:22:58 +0200 |
Eric,
Thanks a lot for your quick response. I have tried your suggestion
and it does work, but it behaves in an unexpected way when I do some
minor modifications. Please see below.
On Wed, Oct 7, 2009 at 8:48 PM, Eric Schulte <address@hidden> wrote:
>> 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---
This works, but see what happens with this (no previous src chunks):
#+begin_src python :session :results output
2
#+end_src
#+resname:
: 2
: 2
(expected nothing, which is what I get if I remove the :session).
#+begin_src python :session :results value
2
#+end_src
#+resname:
: 0
This is how my python buffer looks like after processing this last
chunk in a fresh session:
--8<---------------cut here---------------start--------------->8---
>>> import emacs; print '_emacs_out ()'
/Applications/Emacs.app/Contents/Resources/etc/emacs.py:24:
DeprecationWarning: the sets module is deprecated
from sets import Set
2
_
'org_babel_python_eoe'
2
2
>>>
>>>
>>> _
2
>>> 'org_babel_python_eoe'
'org_babel_python_eoe'
>>>
--8<---------------cut here---------------end--------------->8---
But, interestingly, if I return a string instead of a number, as you
do in your example, it works:
#+begin_src python :session :results value
"2"
#+end_src
#+resname:
: 2
It is not related to a previous chunk messing up the python
interpreter. I have moved to the git version, and it still behaves
like this. I am using python 2.6.1.
> 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.
This is cool. It would also be great if you could define a default
interpreter (I suspect most usage will involve a single interpreter
per buffer).
Thanks again!
jm
--
http://juanreyero.com/blog