This is my first post here...

I have been using org-mode as a pure TODO-tool for some time but this
winter I realised it could be used for much more and I have been
experimenting with mixing in LaTeX and Python for fun and because I find
literate programming a particularly sane idea (I am a HW engineer).

Less than I week ago I started to look into using tables for input and
output to/from Python scripts. I was inspired by something I found at
http://kitchingroup.cheme.cmu.edu/ . The enclosed example 1 file is a
pruned version of the org-file I found there. If I run the embedded Python
script using C-c C-c I don't get the table shown in the example. Instead I
get "none" on the row following "#+RESULTS:"

If I change ":results raw" to ":results output" I do get the table but
'wrapped' in "#+begin_example" and "#+end_example" as shown in  the
enclosed example 2 file. I have done some further testing/changes in that
file (adding some stuff to the top of the file and changing the formatting
of the print statements) none of which changed the extra wrapping of the
table. When I export to LaTeX -> PDF the table does not show up in the end
result.

Let's move over to the third example file and the real mystery. This all my
own code. Reading data from the first table works just fine and the same
goes for the calculations. The output table, however, is different from
that of example 2. The 'wrapper' is gone but each row is starting with ":
". Where does that come from? Why does it differ from example 2? If my
results differ from someone else's (different install/versions etc) -- OK.
But how can I get differences like this on my own? To my  un-trained eyes
the print statements of examples 2 and 3 look very similar. (But, the first
things that go blind are the eyes... probably something blatantly obvious
once pointed out to me.)

OS: #! Linux (Based on Debian stable, 64-bit)
Emacs: 23.4.1
Org-mode: 8.2.5h
Python: 2.7.3

TIA,
-- 
Martin Schöön

http://hem.bredband.net/b262106/index.html