resolving in python

sample.py

#!/usr/bin/python
# Rewrite URL Script for Secure Web Issue
# author: Kaan Yamanyar
from Crypto.Cipher import DES
from datetime import datetime, timedelta
import sys
import re
import base64

def parseToken(str):
  cipher = DES.new('oldhouse',DES.MODE_CFB, 'houseold')
  resolved=cipher.decrypt(base64.b64decode(str))
  return resolved

#... code goes on