Cython compiled C extension: ImportError: dynamic module does not define init function

Question

I have just compiled part of my C library as an extension using Cython, as a \"proof of concept\". I managed to hack the code (const correctnes problems etc aside), to final

Answer 1

I've found that a frequent cause of this problem is, when using a distutils setup file to compile the code, that the .pyx base name does not match the extension name, e.g:

ext = Extension(name='different', sources=['cython_ext.pyx']) # Won't work

To avoid the problem the extension name should be exactly the same, in this case, cython_ext.