Compile python code to c code with multiple files usng cython

create a python code like that
 

nepyx.py

def test(x):
    print(str(x))

To work with cython rename this nepyx.py file to nepyx.pyx  extension file.

Now to compile to this .pyx file to c code create an setup.py file like this

setup.py

from setuptools import setup
from Cython.Build import cythonize

setup(
    ext_modules=cythonize('nepyx.pyx'),
)

this work on only one file in that directory , but if your directory contains more than one .pyx file then write this , you can also use this file for single file.

from setuptools import setup
from Cython.Build import cythonize

setup(
    ext_modules=cythonize('./*.pyx'),
)

This setup.py file should be kept in the directory where is .pyx file.

To compile .pyx  run the below command in terminal and it will generate  .so  compiled binary file in a respected directory and import this .so file

rnjn@rnjn:~/PycharmProjects/cython-project$ python3 setup.py build_ext --inplace

Compiling ./nepyx.pyx because it changed.

[1/1] Cythonizing ./nepyx.pyx
/usr/lib/python3/dist-packages/Cython/Compiler/Main.py:369: FutureWarning: Cython directive 'language_level' not set, using 2 for now (Py2). This will change in a later release! File: /home/rnjn/PycharmProjects/cython-project/nepyx.pyx
  tree = Parsing.p_module(s, pxd, full_module_name)
running build_ext
building 'nepyx' extension
x86_64-linux-gnu-gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -g -fwrapv -O2 -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/usr/include/python3.8 -c ./nepyx.c -o build/temp.linux-x86_64-3.8/./nepyx.o
x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fwrapv -O2 -Wl,-z,relro -g -fwrapv -O2 -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-x86_64-3.8/./nepyx.o -o build/lib.linux-x86_64-3.8/nepyx.cpython-38-x86_64-linux-gnu.so
copying build/lib.linux-x86_64-3.8/nepyx.cpython-38-x86_64-linux-gnu.so -> 

rnjn@rnjn:~/PycharmProjects/cython-project$ 

After compiling this  nepyx.cpython-38-x86_64-linux-gnu.so  was generated and keep it as usual and can delete your others .py and .pyx file or copy them to other directory to test the how its work. Do not rename this .so file otherwise will not work.

Now create a test file and import this .so file using import  nepyx to see how its work:

testing.py

#testing.py
import nepyx
nepyx.test(4)

After running this testing.py file you can see the following output:

rnjn@rnjn:~/PycharmProjects/cython-project$ python3 testing.py 
4
rnjn@rnjn:~/PycharmProjects/cython-project$