[mod_python] reading form responses?

I'm trying my first form...

In my python handle I write a form via the request object.  Is there any
way at that point to have the form displayed and get responses via
util.FieldStorage?  

Or do I just return after writing the form and wait for the handler to
be called again, recognize the state of the client (via a cookie value)
and then get responses via util.FieldStorage?

John