Babel source code not working

Question

I may have missed something somewhere but I can't make babel work !

I have installed and enabled correctly python-mode and in org mode I enter the begin_src section by completing .

Everything stay grey and it with no code indentation, it seems that python isn't recognize.

In my .emacs I have loaded python for babel :

(org-babel-do-load-languages
 'org-babel-load-languages
 '((emacs-lisp . t)
   (python . t)
   ))

The org file section looks like this :

#+BEGIN_SRC: python
def hello( ):
    print "hello"
#+END_SRC

I haven't seen it working on my computer yet and I keep dreaming of it every night !

Is there any org hero in the area ?

Answer 1

try:

(setq org-src-fontify-natively t
    org-src-preserve-indentation t
    org-src-tab-acts-natively t)

in your init file. This should give you syntax highlighting, allow you to indent as you would in python-mode, and preserve those indents when if you export. Also, get rid of the : after BEGIN_SRC. So your example should be:

#+BEGIN_SRC python
def hello():
    print "hello"
#+END_SRC

On my computer, with those options it looks like:

And notice, I am still in org-mode :) With your cursor at the end of the src block, you can hit C-x C-e to evaluate your hello function, and print the result in the echo area at the bottom of your frame!