For reference only, it can be bound to 0.0.0.0, and then it can be accessed from the external network. The IP is the host address

def main():
    parse_options()
    http_server = tornado.httpserver.HTTPServer(Application(),xheaders=True)
    print "Server started on port "+str(options.port)
    http_server.bind(int(options.port), "0.0.0.0")# listen local only "127.0.0.1"
    http_server.start(1)
    tornado.ioloop.IOLoop.instance().start()


if __name__ == '__main__':
    main()

Listen to 0.0.0.0

Listening 0.0.0.0

Application’s listen method can specify IP, such as

app.listen(8888, address="0.0.0.0")