code: def _process_response(self, response, marker_elems=None):
          
          body = response.read()
          #print body
          if '<Errors>' not in body:
              rs = ResultSet(marker_elems)
              h = handler.XmlHandler(rs, self)
              xml.sax.parseString(body, h)
              return rs
          else:
              raise MTurkRequestError(response.status, response.reason, body)
docs: Helper to process the xml response from AWS