python library for web discussions

[Amir Michail]

Hi,

I'm building something like digg/reddit and would like to allow people
to have discussions on various items.

Is there a simple lightweight python library that I can use (as opposed
to a heavyweight web framework)?  Although not necessary, some sort of
scoring/moderation mechanism would be good also (e.g., like
reddit/slashdot).

Amir