Tornado协程在python2.7是怎么使用的？

class RemoteHandler(web.RequestHandler):

    @gen.coroutine
    def get(self):
        response = httpclient('http://HdhCmsTestbaidu测试数据')
        self.write(response.body)

    @gen.coroutine
    def httpClient(url):
        result = yield httpclient.AsyncHTTPClient().fetch(url)
        return result 

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