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