def test_emptyGet(self):
        """
        Test getting a non-available key: it succeeds but return L{None} as
        value and C{0} as flag.
        """
        return self._test(
            self.proto.get(b"foo"), b"get foo\r\n",
            b"END\r\n", (0, None))

        Test getting a non-available key: it succeeds but return L{None} as
        value and C{0} as flag.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/test/test_memcache.py