PYTHON setup.py build_ext --inplace

PYTHON -c "import a"

######## setup.py ########

from Cython.Build.Dependencies import cythonize

from distutils.core import setup

setup(

    ext_modules = cythonize("**/*.pyx"),

    )

######## a.pyx ########

import sys

import a

assert a in sys.modules.values(), list(sys.modules)

assert sys.modules['a'] is a, list(sys.modules)

from atest.package import module

######## atest/__init__.py ########

######## atest/package/__init__.py ########

######## atest/package/module.pyx ########

import sys

assert 'atest.package.module' in sys.modules

import a

import atest.package.module as module

assert module in sys.modules.values(), list(sys.modules)

assert sys.modules['atest.package.module'] is module, list(sys.modules)