Use google app engine webapp application

def main():

application = webapp.WSGIApplication([

('/.*', MainHandler)],

debug=True)

wsgiref.handlers.CGIHandler().run(application)

This bit of code is best translated as “Create a new web application, and route all the URLs that come to this application (/.*) to the MainHandler class; once the application has been created and configured with its routing, run the application.”