code: def open(self, url, method='get', **kwargs):
          
          response = self.session.request(method, url, **self._build_send_args(**kwargs))
          self._update_state(response)
docs: Open a URL.
  
          :param str url: URL to open
          :param str method: Optional method; defaults to `'get'`
          :param kwargs: Keyword arguments to `Session::request`