hello world

 1 import tornado.ioloop
 2 import tornado.web
 3 
 4 class MainHandler(tornado.web.RequestHandler):
 5     def get(self):
 6         self.write(‘Hello World‘)
 7 
 8 
 9 def make_app():
10     return tornado.web.Application([
11         (r‘/‘, MainHandler),
12     ])        
13 
14 
15 if __name__ == ‘__main__‘:
16         app = make_app()
17         app.listen(8888)
18         tornado.ioloop.IOLoop.current().start()