If you are on c++ there is boost python. It wraps the CPyyhon api in a good way with lots of nice stuff like automatic ref counting, function definitions and data type conversions.
Oh it's great of you're binding c++. Template magic, magick-er than boost, didn't think it was possible but it works really nice out of the box. So nice it inspired other libraries in other languages. See Ada-py-bind on github. Still some code to write by hand but the abstraction is quite nice.
