J2EE equivalent in Python

[Stephen]

One of the great things about J2EE or just JSP/servlets is the ability
to create your web application (war file) and deploy it on any of the 
application servers on the market, be it Tomcat, BEA, Websphere, iPlanet,
Blazix, or whoever. If one of these Python web projects/products 
mentioned here were to support similar behaviour, perhaps based on jython, 
then it would be a clear winner.  The market (read "employment") dictates 
that I use Java/JSP/Servlets/Javabeans nowadays, using jython for
prototyping, and sidelining python for my own client-side GUI applications,
that are more for personal rather than commercial use.

Stephen.