fromtornadoimportweb,ioloopimportdatetimeperiod=5*1000#every5sclassMainHandler(web.RequestHandler):defget(self):self.write('HelloTornado')deflike_cron():printdatetime.datetime.now()defxiaorui():print'xiaorui2s'deflee():print'wansuilee3s'if__name__=='__main__':application=web.Application([(r'/',MainHandler),])application.listen(80)ioloop.PeriodicCallback(like_cron,period).start()#startschedulerioloop.PeriodicCallback(xiaorui,1000).start()#startschedulerioloop.PeriodicCallback(lee,3000).start()#startschedulerioloop.IOLoop.instance().start()