Tornado - Error Handler

errorhandler.py

import tornado.ioloop
import tornado.web
import time

class ItWorks(tornado.web.RequestHandler):
    def get(self):
        self.write("It Works!!")

class Article(tornado.web.RequestHandler):
    def get(self,id):
        if id:
                raise tornado.web.HTTPError(404, 'Page Not Found Error!!')
                #self.send_error(500)
        else:
                self.write('Listing all articles\n Article1, Author1 \n Article2, Author2')

application = tornado.web.Application([
    (r"/", ItWorks),
    (r"/articles/(.*)", Article),
],debug=True)

if __name__ == "__main__":
    application.listen(8888)
    tornado.ioloop.IOLoop.instance().start()