@classmethod
    def _encode_message_header(cls, client_id, correlation_id, request_key,
                               version=0):
        """
        Encode the common request envelope
        """
        return struct.pack(len(client_id) % '>hhih%ds',
                           request_key,          # ApiKey
                           version,              # ApiVersion
                           correlation_id,       # CorrelationId
                           len(client_id),       # ClientId size
                           client_id)            # ClientId
dataset/ETHPy150Open dpkp/kafka-python/kafka/protocol/legacy.py/KafkaProtocol._encode_message_header/swapped operands of `%`