龙卷风相当于延迟

尝试这个：

import timefrom tornado.ioloop import IOLoopfrom tornado.web import RequestHandler, asynchronousfrom tornado import genclass MyHandler(RequestHandler):    @asynchronous    @gen.engine    def get(self):        self.write("sleeping .... ")        self.flush()        # Do nothing for 5 sec        yield gen.Task(IOLoop.instance().add_timeout, time.time() + 5)        self.write("I'm awake!")        self.finish()

取自这里。