q.py

class Enum(object):
    def __init__(self, *args, **kwargs):
        raise NotImplemented


class Person(object):
    gendor = Enum("gendor", fields=("male", "female", "unknown"))

    def __init__(self):
        self.gendor = "unknown"


def test_person_set():
    person = Person()

    assert person.gendor == "unknown"
    assert vars(person)['gendor'] == 2

    person.gendor = "male"
    assert vars(person)['gendor'] == 0

    person.gendor = "female"
    assert vars(person)['gendor'] == 1

    try:
        person.gendor = "yh1409"
    except AssertionError:
        pass
    else:
        assert False, "AssertionError should be raised."


def test_person_get():
    person = Person()

    vars(person)['gendor'] = 0
    assert person.gendor == "male"

    vars(person)['gendor'] = 1
    assert person.gendor == "female"

    vars(person)['gendor'] = 10
    try:
        person.gendor
    except AssertionError:
        pass
    else:
        assert False, "AssertionError should be raised."


if __name__ == "__main__":
    test_person_set()
    test_person_get()