比如说要等某个耗时操作的结果, 该怎么写?

网上看了半天例子, 照着做了做, 貌似行不通

class AsyncTaskHandler(tornado.web.RequestHandler):

@tornado.web.asynchronous
@tornado.gen.coroutine
def get(self, *args, **kwargs):
    resp = yield tornado.gen.Task(self.do_something)
    self.finish(resp)

@tornado.gen.coroutine
def do_something(self, *args, **kwargs):
    time.sleep(10)
    return {'message': 'OKOK'}