How to best utilize C++/python combination?

[grim]

I want to write as much of my game in python as possible, using c++ to handle graphics and low level stuff.  What would be the best way to handle this?  Can I run my main game loop in python and make calls to c++ methods when the screen needs to be updated and drawn? Or should I have the main game loop in c++ and just have it make calls to python methods and objects?  Which would be better and/or more efficient?

For clarification, everything related to game data would be in python, not just data manipulation algorithms.  So classes and their methods would be in python too.

[Jesper Juhl]

Not exactly what you asked, but check out Kivy.

[grim]

I know about kivy, but that's not what I meant. What I meant is that I am going to write part of the game in C++ and then part of the game in python, not use some special library that mixes the two together.  Besides I believe kivy is java and python.

[Mörkö]

For clarification, everything related to game data would be in python, not just data manipulation algorithms.  So classes and their methods would be in python too.

I don't understand, what are your methods doing, if they aren't doing "data manipulation"? Please clarify what you are talking about with a more elaborate explanation, and preferably some pseudo code examples.