程序包无法导入鸡蛋中的cython库

Question

I can use my package from its folder, but as soon as I install it as an egg package, cython-based modules can't get imported.

I have the following package structure

src/
├── mypkg/
│   ├── __init__.py
│   ├── myfile.py
├── cython/
│   ├── fastcode.pyx
setup.py

The module myfile.py imports import fastcode . In setup.py , I have

setup(
    name='mypkg',
    version='0.1',
    packages=find_packages(where="src"),
    package_dir={'':'src'},
    cmdclass={'build_ext': build_ext},
    ext_modules=df_ext_modules,
)

I also have in setup.cfg ,

[build_ext]
build-lib=src/mypkg

If I run python setup.py install , the cython code gets compiled and creates fastcode.pyd (or fastcode.so in Linux) in mypkg folder as instructed by the config file.

Now, if I go to the mypkg folder, and run python , I can safely do import mypkg.myfile . However, when I run python from some other folder (such that the installed .egg file gets used) I get error ImportError: No module named fastcode .

I tried to add

package_data={
    'mypkg': ['*.pyd', '*.so']
},

to setup.py , this adds fastcode.pyd to the egg file (by exploring the unzipped version), but still doesn't work for importing.

Answer 1

I found how to fix it in my case: had to remove setup.cfg . For those who are interested, the problem is that with the new setup, the .egg file also contains generated fastcode.py file, and fastcode.pyc file, not just fastcode.pyd file (which I would expect by looking at mypkg after the compilations with the previous setup where only .pyd files were present).