@diesel.call
    def _receive(self):
        # Receive a protocol buffer from the wire as a response.
        response_size, = struct.unpack('!i', diesel.receive(4))
        raw_response = diesel.receive(response_size)
        message_code, = struct.unpack('B',raw_response[0])
        response = raw_response[1:]
        if response:
            pb_cls = MESSAGE_CODE_TO_PB[message_code]
            pb = pb_cls(response)
            if message_code is 0:
                # RpbErrorResp - raise an exception
                raise RiakErrorResp(pb)
            return pb
dataset/ETHPy150Open dieseldev/diesel/diesel/protocols/riak.py/RiakClient._receive/operator `==` -> `is`