from Crypto.Cipher import AES
from Crypto import Random

key = b'dzaaaaaaaaaaaaaa'
cipher = AES.new(key, AES.MODE_CFB, key)
msg = cipher.encrypt(b'This is the secret message      ')

open("output.aes", "w").write(msg)

# decryption
# To get rid of leading gibberish, re-make the object
# Why?  Think about the initialization vector and CFB
key = b'dzaaaaaaaaaaaaaa'
cipher = AES.new(key, AES.MODE_CFB, key)
print cipher.decrypt(open("output.aes").read())