On Nov 16, 2010, at 1:46 PM, Mario E. Munich wrote:

> Dear all,
>
> I am trying to use the org-article class created by Tomas Dye. As  
> you might guess, I am having some trouble and thus the email. I am  
> using emacs 23.1.1 on Ubuntu 10.10 and org-mode verision TAG=7.3.
>
> I have followed the instructions on worg:
>
> http://orgmode.org/worg/org-contrib/babel/examples/article-class.php
>
> up to the point in which I need to tangle the org document.
>
> If I try to run the tangle command: M-x org-babel-tangle RET, I get  
> the following error: No org-bable-execute function for python!
>
> I think that  the problem is that I do not have any setup for Babel  
> in my .emacs, so I went to look for the standard Babel setup in the  
> org manual and in worg.
>
> - In the org Manual, I see chapter 14 devoted to Babel, but I do not  
> see any information on how to set it up in my .emacs (maybe it is  
> enabled by default since Babel is included in org, but I am not sure).
>
> - In worg, there is a page for Babel: http://orgmode.org/worg/org-contrib/babel/index.php 
>  and a corresponding Introductory Tutorial. In this page, there is a  
> section called Initial Configuration in which there is a mention of  
> a "five-step process", but the corresponding list of steps only have  
> 3 items.
>
> I would appreciate if somebody could guide me towards a simple Babel  
> configuration that would help me tangle the org-article.org document.
>
> Thanks a lot for all the help!
>
> -Mario

Aloha Mario,

Yes, it sounds like Babel isn't configured yet.  Here is what I use:

#+begin_src emacs-lisp :tangle yes
   (org-babel-do-load-languages
    'org-babel-load-languages
    '((R . t)
      (C . t)
      (ditaa . t)
      (dot . t)
      (emacs-lisp . t)
      (gnuplot . nil)
      (haskell . nil)
      (latex . t)
      (ocaml . nil)
      (org . t)
      (perl . t)
      (python . t)
      (ruby . t)
      (screen . nil)
      (sh . t)
      (sql . nil)
      (sqlite . t)))
#+end_src

You can adjust it to your needs by changing t and nil appropriately.

hth,
Tom