In tornado, tornado.web.RequestHandler maps URLs to subclasses and tornado.web.Application class starts a server at the beginning with certain settings For instance, in the example below: When a HTTP GET request is made to http://127.0.0.1:8888/, class Hello handles it & requests made to http://127.0.0.1:8888/user are catered by class User A web form  is rendered to the … Continue reading Tornado – Request Handlers →