Correct way to setup a package with both compiled C code and Python code?

[Dieter Maurer]

Christian Gollwitzer wrote at 2022-2-7 20:33 +0100:
>we've developed a Python pacakge which consists of both a compiled
>extension module and some helper functions in Python. Is there a
>tutorial on how to package such an extension?

Look at "https://package.python.org",
especially "https://packaging.python.org/en/latest/guides/packaging-binary-extensions/".