How to import Cython-generated module from python to C/C++ main file? (programming in C/C++) [closed]

Answer 1

Just declare the stuff you want to call in c/c++ as cdef public

for example:

# cymod.pyx
from datetime import datetime

cdef public void print_time():
    print(datetime.now().ctime())

When cythonizing cymod.pyx to cymod.c, a cymod.h will be generated as well.

Then make a library, eg: cymod.lib (on windows).

In the c codes(main.c):

#include "Python.h"
#include "cymod.h"


int main(int argc, char **argv)
{
Py_Initialize();  

PyInit_cymod();  // in cymod.h
print_time();    // call the function from cython

Py_Finalize();
return 0;
}

Compile and run(main.exe)

Note: main.exe is highly bound to the python environments, one may run into errors such as cannot find pythonxx.dll, Fatal Python error: Py_Initialize: unable to load the file system codec. There are many solutions on this site.