From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jack Kamm <jackkamm@gmail.com>
Subject: ob-python newline & indentation behavior
Date: Sat, 18 Nov 2017 12:02:24 +0000
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To: emacs-orgmode@gnu.org

ob-python newline & indentation behavior in :session is very ugly and 
possibly broken. For example, consider the following code block:

#+BEGIN_SRC python :session :results output
   foo = 0
   for _ in range(10):
       foo += 1

       foo += 1

   print(foo)
#+END_SRC

Ideally this would print "20", but instead it prints "11",
because the second "foo+=1" is executed after the for loop.
OTOH "python-shell-send-region" (from python.el) gives the correct 
answer of "20".

The inconsistent behavior of "python-shell-send-region" and 
"org-babel-eval" often causes me problems, because I want to use both 
(the former for testing and async eval; the latter for inserting into 
the document).

There is a 2 year old patch that fixes this behavior but has not yet 
been incorporated:
https://lists.gnu.org/archive/html/emacs-orgmode/2015-03/msg00505.html

The patch follows the python.el behavior of using a temporary file and 
executing that from the shell.

Could this patch, or something similar, be incorporated into org-mode, 
to fix this behavior?

Thanks,
Jack Kamm