def serialized(self):
        to_ret = {}
        for group, requirements in self.items():
            to_ret[group] = [str(requirement) for requirement in requirements]
        return to_ret
def test_contains_itself(self):
        class Recursive(Structure):
            pass

        try:
            Recursive._fields_ = [("next", Recursive)]
        except AttributeError as details:
            self.assertTrue("Structure or union cannot contain itself" in
                            str(details))
        else:
            self.fail("Structure or union cannot contain itself")