cython

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PYTHON setup.py build_ext --inplace
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PYTHON -c "import a"
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######## setup.py ########
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from Cython.Build import cythonize
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from distutils.core import setup
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# Add ./site-packages to sys.path
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from os.path import realpath
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import sys
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sys.path.append(realpath('site-packages'))
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setup(
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  ext_modules = cythonize("*.pyx"),
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)
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######## site-packages/b/__init__.py ########
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######## site-packages/b/other.pxd ########
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cdef extern from "foo.c":
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    int foo(int)
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######## site-packages/b/foo.c ########
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static int foo(int a)
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{
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    return a * a;
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}
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######## a.pyx ########
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from b.other cimport foo
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print(foo(10))
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cimport b.other
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print(b.other.foo(10))
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