HELP with HTTPLIB/URLLIB

[Alan Alper]

I need to duplicate the action of a browser POSTing form data to a server.
GET is easy, but I don't know how to do POST. Any and all help, preferably
with examples would be welcome.  Essentially, I'm trying to write a small
agent to fetch classified ad data from several newspaper websites for me so
that I don't need to visit the sites manually.  I have no clue how to do a
POST.

Thanx in advance.

Al