WOW, many thanks guys, Peter, and MRAB, for your time, help, and explanations!
Peter, yes, you're right, when things get too complicated I should definitely try to split things up, and thus split the difficulties (ah, Descartes... ^^), thanks for the advice! MRAB, your code is now working, thank you SO MUCH! You just put an end to 4 days of headaches because of that code! And most importantly, thanks for the explanation, I can now understand what was wrong in the code and not reproduce the same mistake, your help is invaluable and I can now go on with the rest of my analysis. Thanks again guys, I posted this question on several forums, and you're the only ones who have been able to actually help me solve the issue, you're the best! ; ) -- https://mail.python.org/mailman/listinfo/python-list
