[mod_python] How to do session-tracking and user-logins?

I need a way to force users to log in, and then I need to track a
session, either with cookies, or session IDs.  I should probably learn
both methods, but right now I don't know either.

I've done this with PHP, but I don't really like PHP.  Can anyone give
me a description of how to handle sessions in mod_python?

I've been writing CGI scripts for a while, and I know how to use basic
http user authentication with .htaccess files. 

Thanks.

-- 
My public key:
gpg --recv-keys --keyserver www.mandrakesecure.net 0x8D10BFD5