On Nov 4, 2009, at 10:27 PM, Torsten Wagner wrote:
> ...

> 2. Is it possible (by a keyboard-shortcut) to execute all blocks of  
> a session
> starting from top to down? Sometimes I make small changes here and  
> there and I
> just like to say o.k. tangle all this together and execute it,  
> refresh and
> show me all new results. This might be even combined by a org-mode  
> variable
> which allow to define which results need to be refreshed before  
> saving the org-
> mode file (something like #+EXECBYSAVE: name_of_session).
> I press C-x C-s rather frequently without much thinking of it. If I  
> want make
> sure that e.g., all generated output files (e.g. figures) are in  
> sync with the
> code it would be nice to say C-x C-s  and all external figures will be
> recreated if necessary.

> ...

Aloha Torsten,

Would something like run-code-blocks (below) do what you want?  I put  
a source block like this at the top of my org-babel file, where I can  
find it quickly.

#+srcrname: run-code-blocks
#+begin_src python :noweb
<<block-1>>
<<block-2>>
#+end_src

#+srcname: block-1
#+begin_src python
a = 1
a
#+end_src

#+srcname: block-2
#+begin_src python
b = 1
b
#+end_src

All the best,
Tom