def test_number_set(self):
        """Store and retrieve a number set"""
        self.make_table()
        item = {
            "id": "a",
            "datas": set([1, 2, 3]),
        }
        self.dynamo.put_item("foobar", item)
        ret = list(self.dynamo.scan("foobar"))[0]
        self.assertEqual(ret, item)