code: def execute(self):
          
          es = connections.get_connection(self._using)
  
          self._response = self._response_class(
              self,
              es.update_by_query(
                  index=self._index,
                  body=self.to_dict(),
                  **self._params
              )
          )
          return self._response
docs: Execute the search and return an instance of ``Response`` wrapping all
          the data.