tornado coroutine return

gistfile1.txt

import tornado.ioloop
import tornado.web
import tornado.gen
import tornado.httpclient
from tornado.platform.caresresolver import CaresResolver
import time

@tornado.gen.coroutine
def test():
    client = tornado.httpclient.AsyncHTTPClient()
    response = yield client.fetch('http://www.baidu.com')
    response = response.body
    # do something with the response
    raise tornado.gen.Return(response)


class MainHandler(tornado.web.RequestHandler):
    @tornado.gen.coroutine
    def get(self):
        response = yield test()
        self.write(response)

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

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