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pythonc++cythonpyx

python/cython compiling pyx: fatal error: capsule.h: No such file or directory

I recently worked on a python project where I need to import some .pyx files.

However, I had a hard time import it as .pyx and compile it with the following lines:

import pyximport
pyximport.install()
from . import kl

The error is 

fatal error: capsule.h: No such file or directory

And in the kl.pyx file, capsule.h is used as following:

cdef extern from "capsule.h":
     void* Capsule_AsVoidPtr(object ptr)

I am not sure what I should do. Please help me a little bit.

Alternatively, is it possible that the python script could import compiled .c (in Linux) file directly, instead of importing .pyx and compile it? When I compile it with command line, it is compiled successfully, but I don't know how my IDE (PyCharm) could import that .c file.

Thank you very much.

Solution

  • you missed some library, you need to install the source code of capsule.h.