def test_maybe_list(self):
    self.assertEqual(maybe_list(1), [1])
    self.assertEqual(maybe_list([1]), [1])
    self.assertIsNone(maybe_list(None))
def test_maybe_list(self):
    self.assertEqual(maybe_list(1), [1])
    self.assertEqual(maybe_list([1]), [1])
    self.assertIsNone(maybe_list(None))