Python robot web client?

[Paul Rubin]

Are there any Python robot web clients around, sort of like Perl LWP?
I mean something fancier than urllib, that parses the HTTP headers and
remembers any cookies.  It would also be great if it parsed the HTML
enough to find the form fields, links, and so forth.  I guess I can
implement what I need, but thought I'd ask first if something like
it is already available.

Thanks.