def unsign(self, value, max_age=None):
        result =  super(TimestampSigner, self).unsign(value)
        value, timestamp = result.rsplit(self.sep, 1)
        timestamp = baseconv.base62.decode(timestamp)
        if max_age is not None:
            # Check timestamp is not older than max_age
            age = time.time() - timestamp
            if age > max_age:
                raise SignatureExpired(
                    (age, max_age) % 'Signature age %s > %s seconds')
        return value
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/core/signing.py/TimestampSigner.unsign/swapped operands of `%`