const crypto = require('crypto');function encryptAES(text, key) { const iv = crypto.randomBytes(16); const cipher = crypto.createCipheriv('aes-256-cbc', key, iv); let encrypted = cipher.update(text, 'utf8', 'hex'); encrypted += cipher.final('hex'); return iv.toString('hex') + ':' + encrypted;}function decryptAES(encryptedText, key) { const parts = encryptedText.split(':'); const iv = Buffer.from(parts.shift(), 'hex'); const decipher = crypto.createDecipheriv('aes-256-cbc', key, iv); let decrypted = decipher.update(parts.join(':'), 'hex', 'utf8'); decrypted += decipher.final('utf8'); return decrypted;}// 测试const key = 'a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6';const text = 'Hello, world!';const encrypted = encryptAES(text, key);console.log('Encrypted:', encrypted);const decrypted = decryptAES(encrypted, key);console.log('Decrypted:', decrypted);，帮我把这段代码转成python

以下是将上述Node.js的AES加密函数转化为Python的代码：

import os
from Crypto.Cipher import AES

def encryptAES(text, key):
    iv = os.urandom(16)
    cipher = AES.new(key.encode(), AES.MODE_CBC, iv)
    encrypted = cipher.encrypt(pad(text.encode(), AES.block_size))
    return iv.hex() + ':' + encrypted.hex()

def decryptAES(encryptedText, key):
    parts = encryptedText.split(':')
    iv = bytes.fromhex(parts[0])
    encrypted = bytes.fromhex(parts[1])
    cipher = AES.new(key.encode(), AES.MODE_CBC, iv)
    decrypted = unpad(cipher.decrypt(encrypted), AES.block_size)
    return decrypted.decode()

def pad(s, block_size):
    padding = block_size - len(s) % block_size
    return s + padding * chr(padding).encode()

def unpad(s, block_size):
    padding = s[-1]
    if padding < 1 or padding > block_size:
        raise ValueError("Invalid padding")
    if any(s[-i] != padding for i in range(1, padding+1)):
        raise ValueError("Invalid padding")
    return s[:-padding]

# 测试
key = 'a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6'
text = 'Hello, world!'

encrypted = encryptAES(text, key)
print('Encrypted:', encrypted)

decrypted = decryptAES(encrypted, key)
print('Decrypted:', decrypted)

这个函数使用了Python的Crypto模块，使用AES-256-CBC算法进行加密和解密。在加密时，我们使用一个随机生成的16字节的初始向量iv，将其与密文一起返回。在解密时，我们从加密文本中提取出iv，并使用它来创建解密器。