From mboxrd@z Thu Jan  1 00:00:00 1970
From: mdoyley@ur.rochester.edu (Doyley, Marvin)
Subject: Re: babel python example not reproducible
Date: Wed, 11 Jun 2014 03:48:36 -0400
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To: emacs-orgmode@gnu.org

Works for me, see example below
#+BEGIN_SRC python :results output :session foo

x=100
print "hello"
2
print "bye"
#+END_SRC

#+RESULTS:
: 
: >>> hello
: 2
: bye

#+BEGIN_SRC python :results output :session foo

print "hello good bye"
print "Printing value from previous session", x
#+END_SRC

#+RESULTS:
: 
: hello good bye
: Printing value from previous session 100

The only difference is that I like to give my session a name and for
what it is worth I am using ipython (don't think this will make a difference). You can do this including the
following statement in your .emacs file

(setq python-shell-interpreter "ipython")
(setq python-shell-interpreter-args "--pylab")

Hope this help.
Cheers,
M