如何在Python中进行数据可靠性传输和备份

import hashlib

def calculate_hash(data):
    sha256 = hashlib.sha256()
    sha256.update(data)
    return sha256.hexdigest()

def send_data(data):
    hash_value = calculate_hash(data)
    # 将数据和哈希值一起发送
    send(data)
    send(hash_value)

def receive_data():
    received_data = receive()
    received_hash = receive()
    
    if calculate_hash(received_data) == received_hash:
        # 校验通过，数据完整
        process_data(received_data)
    else:
        # 校验失败，数据可能被篡改
        handle_error()

import gzip

def compress_data(data):
    compressed_data = gzip.compress(data)
    return compressed_data

def send_data(data):
    compressed_data = compress_data(data)
    # 发送压缩后的数据
    send(compressed_data)

def receive_data():
    received_data = receive()
    uncompressed_data = gzip.decompress(received_data)
    process_data(uncompressed_data)

import shutil

def backup_data(data, backup_dir):
    # 将数据保存到备份目录
    backup_file_path = backup_dir + "/backup.txt"
    with open(backup_file_path, "w") as backup_file:
        backup_file.write(data)

def main():
    data = "需要备份的数据"
    backup_dir = "/path/to/backup/dir"
    backup_data(data, backup_dir)

if __name__ == "__main__":
    main()