[Twisted-Python] twisted.web session expiry

[Daniel Browne]

I need someone to help me with twisted.web.

How can I do something (eg. redirect) once a users session has expired? 
At the point when the session expires your request is finished and your 
session is expired. I have added the notification callback but I can't 
really do anything inside it without a session to store information in 
or a request to redirect with, so I just print a message to the console.

Can anyone help me understand what I'm doing wrong here?

Thanks
Daniel Browne