PYTHON -c "import basic_test; basic_test.test()" ######## basic_test.py ######## import os.path import pyximport pyximport.DEBUG_IMPORT = True pyximport.install(build_dir=os.path.join(os.path.dirname(__file__), "TEST_TMP")) def test(): import mymodule assert mymodule.test_string == "TEST" assert not mymodule.__file__.rstrip('oc').endswith('.py'), mymodule.__file__ ######## mymodule.pyx ######## test_string = "TEST"