[mod_python] Adding user-defined objects to the request

Hi,

I have been playing with mod_python for a while now
and would like to add my own non-trivial objects to
the request object.

I know that it is easy to add objects that are
built-in types such as:

session = {'Id':'&YFH%^%231234'}
req.session = session

Then, req.session, will be available to downstream
handlers to process.  But simply adding an object
doesn't appear to work if it is a user-defined type. 
I would like to do something similar to the following:

Class Session():
...

session = Session()
...
req.session = session

And then, later, in a downstream handler use my
defined methods:

req.session.athenticate()

I have searched the mailing list and the web in
general and can't find anything that is sending me in
the right direction nor telling me it is impossible. 
I have looked at pso and jotweb.  pso appears to
accomplish something similar to what I want but it
will take me weeks to unravel the trickery going on! 
I would just use pso but it does not implement an
authentication token the way I need to based on our
security needs.

Can someone help?

Many thanks in advance.

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