[CMake] include python library in a cmake c++ project

[Max Linke]

Hi

I have a C++ project that runs some simulations and is build with cmake. 
With it I want to build/test/ship a python library to help create input 
files for the C++ project. Is there a recommended way to include C++ and 
Python in the same cmake projects?

Ideally I would like to have a all the python stuff in a separate folder 
and use python tools (distutils) for installation and testing that are 
called from cmake. So when I later type `make install` it should run 
`python setup.up install --prefix=<CMAKE_CONFIGURES_PREfIX>` and ctest 
call a some python script to run the tests.

best Max