软件包中的Python C扩展-不起作用？

Question

I'm working on packaging my python C extension and I'm running into trouble here:

.
|-- c_ext/
|   |-- __init__.py
|-- c_src/
setup.py

With this setup.py

from distutils.core import setup, Extension

setup( name = "Utilities",
       version = '1.0',
       description = ('Various utils'),
       packages = ["utils"],
       ext_modules = [Extension("utils.c_ext", ['c_src/c_extmodule.c'])]
       )

I can build without problems but after installing I can't import my module, I just get an ImportError.

I'm sure it's something trivial, so what am I missing?

Thanks in Advance!

Answer 1

Do you have a function in your module with the following signature:

PyMODINIT_FUNC initc_ext(void);

When you import a C extension it calls the function init where is the exact name of the extension. (Note that the convention is for C extensions to be named something like _foo and you get a function like init_foo)

The exact error would also help diagnose this better.