The Boost Python Library is a framework for interfacing Python and
  C++. It allows you to quickly and seamlessly expose C++ classes
  functions and objects to Python, and vice-versa, using no special
  tools -- just your C++ compiler. It is designed to wrap C++ interfaces
  non-intrusively, so that you should not have to change the C++ code at
  all in order to wrap it, making Boost.Python ideal for exposing
  3rd-party libraries to Python. The library's use of advanced
  metaprogramming techniques simplifies its syntax for users, so that
  wrapping code takes on the look of a kind of declarative interface
  definition language (IDL).