def upload_part(self, upload_id, index_list, part_number_list):
    """
    多线程上传分片

    :param upload_id: 分片上传的upload id
    :param index_list: 所有分片的
    :param part_number_list:
    :return:
    """
    part_number = 1
    total = len(index_list)
    with futures.ThreadPoolExecutor(max_workers=MAX_THREADS) as pool:
        for part_start_index in index_list:
            if part_number not in part_number_list:
                pool.submit(self.upload_thread, upload_id, part_number, part_start_index, total)
            part_number += 1
    print ("所有分片文件已上传, 文件名: {}, 文件大小:{}".format(MULTIPART_UPLOAD_FILE_NAME, MULTIPART_UPLOAD_FILE_SIZE))
    return part_number - 1