def handle_unknown(self, cmd, hdrs, key, cas, data):
        return self._error(memcacheConstants.ERR_UNKNOWN_CMD,
            "The command %d is unknown" % cmd)
Used in the predict phase, after training.  Override
dataset/ETHPy150Open dustin/memcached-test/testServer.py/BaseBackend.handle_unknown--crossover with--dataset/ETHPy150Open VikParuchuri/simpsons-scripts/tasks/train.py/KNNRF.predict