[O] named python session

[Andreas Leha]

Hi python users,

I have a simple question to all python users.  I have a source block
with a named python session, e.g. 
 #+begin_src python :results output :session mypy
   x = 1
   print x
 #+end_src

Now I
- execute that source block and then I
- edit that block in its own buffer via C-c '.

My question:
How do I associate that with the python process in *mypy*?

I am asked to start python when I run python-shell-send-region.

Thanks,
Andreas