Python 3 CBC失败，因为双反斜杠字节

from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from cryptography.hazmat.backends import default_backend

def encrypt(plaintext, key, iv):
    backend = default_backend()
    cipher = Cipher(algorithms.AES(key), modes.CBC(iv), backend=backend)
    encryptor = cipher.encryptor()
    ciphertext = encryptor.update(plaintext) + encryptor.finalize()
    return ciphertext

def decrypt(ciphertext, key, iv):
    backend = default_backend()
    cipher = Cipher(algorithms.AES(key), modes.CBC(iv), backend=backend)
    decryptor = cipher.decryptor()
    plaintext = decryptor.update(ciphertext) + decryptor.finalize()
    return plaintext

# 示例用法
plaintext = b"Hello, World!"
key = b"0123456789abcdef"
iv = b"1234567890abcdef"

ciphertext = encrypt(plaintext, key, iv)
decrypted_text = decrypt(ciphertext, key, iv)

print("加密后的结果:", ciphertext)
print("解密后的结果:", decrypted_text)