gistfile1.py

In [41]: from Crypto.Cipher import AES

In [42]: from Crypto import Random

In [43]: 

In [43]: key = b'Sixteen byte key'

In [44]: iv = Random.new().read(AES.block_size)

In [45]: cipher = AES.new(key, AES.MODE_CFB, iv)

In [46]: encrypted = cipher.encrypt(b'Attack at dawn')

In [47]: print cipher.decrypt(encrypted)
{-????n.??u