在用 [Tornado][tornado] 来写一个爬虫,遇到几个问题,记录一下。 无法捕获异常### def http_client(): _http_client = tornado.httpclient.AsyncHTTPClient() req = tornado.httpclient.HTTPRequest("http://httpbin.org/post", method="POST", body=urllib.urlencode({"a": "a"})) #return _http_client.fetch("http: