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I have a bunch of functions written in python (for rapid prototyping). My main project is in C++ and I wanna call these functions from my C++ program.

These functions use some specialized python modules like numpy, pyside etc.

I tried using the "--embed" functionality of Cython to convert these functions to a C file and then compile that to an object file. Only problem is, Cython converts these functions into standalone programs, ie. makes a main() function in the .c files it creates. I don't want that, I just wanna be able to call them from my C++ program and use the results I obtain.

Are there any other alternatives, I could use to achieve this (Python/C API, SWIG etc)? Or am I using cython to embed python wrong?

I am using Python3 and Cython 0.22.1.

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    I think you will have to use Python/C API for this. Commented Jul 20, 2015 at 12:32
  • Doesn't that entail a lot of confusing reference decrement calls? I read that also involves a lot of data type conversion from Python to C. How will I convert numpy arrays to a type compatible in C++? Also, is there any other examples/documentation on this area apart from this? Commented Jul 20, 2015 at 12:51
  • As far as I understand the --embed cython flag embeds the python interpreter it does not allow you to interface Python code from C. For acessing numpy arrays, use the Numpy C-API. Well yes, using Python code from C is generally more work than the other way around. Commented Jul 20, 2015 at 13:00
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