Also, Boost.Python. http://www.boost.org/doc/libs/1_64_0/libs/python/doc/html/in...

A proprietary piece of software we use at work has a Python API for which they are using Boost.Python.

I've written a piece of software to get some data from the API and to analyze the retrieved data. The Python API has a bit of a "C++ smell" to it and doesn't feel completely pythonic but it's good enough. The bigger problem is that the vendor's idea of documentation is a single PDF generated from the class definitions and everything is either very sparesly or not at all commented, heh.