PYTHON setup.py build_ext --inplace

PYTHON -c "import foo"

PYTHON -c "import a; a.test()"

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

from Cython.Build import cythonize

from distutils.core import setup

setup(

  ext_modules = cythonize("*.pyx"),

)

######## foo.pxd ########

cdef int bar(int i) except *

cdef int (*var_opt)(int) except? -1

cdef int (*var_orig)(int) except *

######## foo.pyx ########

cdef int bar(int i) except *:

    if i == 10:

        raise ValueError()

    return i + 1

var_opt = bar   # by 'accident' of optimisation

var_orig = bar  # by declaration

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

cimport cython

from foo cimport bar, var_orig, var_opt

def test():

    assert bar(-2) == -1

    try:

        bar(10)

    except ValueError:

        pass

    else:

        assert False, "exception not raised in bar()"

    assert var_orig(-2) == -1

    try:

        var_orig(10)

    except ValueError:

        pass

    else:

        assert False, "exception not raised in var_orig()"

    assert var_opt(-2) == -1

    try:

        var_opt(10)

    except ValueError:

        pass

    else:

        assert False, "exception not raised in var_opt()"