def remove(self, elem):
        """Remove a requirement.

        :param elem: a string or :class:`Requirement` instance.
        """
        if isinstance(elem, text_type):
            for requirement in self:
                if requirement.package == elem:
                    return super(Requirements, self).remove(requirement)
        return super(Requirements, self).remove(elem)
def test_keyword_initializers(self):
        class POINT(Structure):
            _fields_ = [("x", c_int), ("y", c_int)]
        pt = POINT(1, 2)
        self.assertEqual((pt.x, pt.y), (1, 2))

        pt = POINT(y=2, x=1)
        self.assertEqual((pt.x, pt.y), (1, 2))