While trying to compute a co-occurrency table for N discrete variables in a data matrix I thought of storing the results in a 2d python list whose elements are 2d numpy arrays: _joint_freqs = ...

example of using ctypes in python to call a C++ function to edit a 2D numpy array. Rough descriptions of how to call a C++ function through ctypes in Python on Windows. Calling a C++ function on a 2D ...