Wrapping C++ project using cython

Question

I would like to wrap a c++ project using cython for using inside a python code. The main class has instances from other local classes. Do I have to write pyx files for every class that has been used or wrapping only the main class is enough?

Thank you in advance!

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Edit:

Here is the code that I want to wrap: https://github.com/vojirt/asms/tree/master/src I would like to wrap colortracker function, as other classes are used in this class, do I need to wrap them as well?

Answer 1

Thanks to DavidW, the problem is solved. I used this code for wrapping cv::Mat:

cdef extern from "opencv2/core/core.hpp" namespace "cv":
    cdef cppclass Mat:
        Mat() except +
        void create(int, int, int)
        void* data

It was only needed to wrap classes and functions directly used in public functions of colortracker class.