gistfile1.py

class AppDispatcher(object):
    def dispatcher(self, environ, start_response):
        ....


startup:

    # Start server
    host = ...
    port = ...
    
    resource = WSGIResource(
            reactor, 
            reactor.getThreadPool(),
            AppDispatcher().dispatcher
    )
    
    site = server.Site(resource)	

    reactor.listenTCP(port, site)

    reactor.run()