input: Write a python function to encrypt and decrypt a message using AES encryption.
  assert encrypt(b'Hello World')[2] != b'Hello World'
  assert decrypt(encrypt(b'Hello World')[2]) == b'Hello World'
output: from Crypto.Cipher import AES
  from Crypto.Random import get_random_bytes
  import base64
  
  def pad(s):
      return s + b"\0" * (AES.block_size - len(s) % AES.block_size)
  
  def encrypt(message):
      key = get_random_bytes(16)
      iv = get_random_bytes(16)
      cipher = AES.new(key, AES.MODE_CBC, iv)
      padded_message = pad(message)
      encrypted_message = cipher.encrypt(padded_message)
      return (key, iv, encrypted_message)
  
  def decrypt(encrypted_message):
      key, iv, ciphertext = encrypted_message
      cipher = AES.new(key, AES.MODE_CBC, iv)
      decrypted_message = cipher.decrypt(ciphertext)
      return decrypted_message.rstrip(b"\0")