Pergunta e resposta com Tornado (Python)

import tornado.ioloop
import tornado.web
import tkSimpleDialog
import Tkinter
root = Tkinter.Tk()
root.withdraw()

class MainHandler(tornado.web.RequestHandler):

    def get(resposta):

        pergunta = tkSimpleDialog.askstring("Pergunta", "Qual o seu nome?")
                resposta = resposta.write("<h1>Oi %s </h1>" % (pergunta))

application = tornado.web.Application([
    (r"/", MainHandler),
])

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