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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def encode_offset_fetch_request(cls, client_id, correlation_id, group, payloads, from_kafka=False):
 """ Encode some OffsetFetchRequest structs. The request is encoded using version 0 if from_kafka is false, indicating a request for Zookeeper offsets. It is encoded using version 1 otherwise, indicating a request for Kafka offsets. Arguments: client_id: string correlation_id: int group: string, the consumer group you are fetching offsets for payloads: list of OffsetFetchRequest from_kafka: bool, default False, set True for Kafka-committed offsets """

        grouped_payloads = group_by_topic_and_partition(payloads)

        message = []
        reqver = 1 if from_kafka else 0
        message.append(cls._encode_message_header(client_id, correlation_id,
                                                  KafkaProtocol.OFFSET_FETCH_KEY,
                                                  version=reqver))

        message.append(write_short_string(group))
        message.append(struct.pack('>i', len(grouped_payloads)))

        for topic, topic_payloads in grouped_payloads.items():
            message.append(write_short_string(topic))
            message.append(struct.pack('>i', len(topic_payloads)))

            for partition, payload in topic_payloads.items():
                message.append(struct.pack('>i', partition))

        msg = b''.join(message)
        return struct.pack('>i%ds' % len(msg), len(msg), msg)