code: def Execute(self, http):
          
  
          self._Execute(http)
  
          for key in self.__request_response_handlers:
              response = self.__request_response_handlers[key].response
              callback = self.__request_response_handlers[key].handler
  
              exception = None
  
              if response.status_code >= 300:
                  exception = exceptions.HttpError.FromResponse(response)
  
              if callback is not None:
                  callback(response, exception)
              if self.__callback is not None:
                  self.__callback(response, exception)
docs: Execute all the requests as a single batched HTTP request.
  
          Args:
            http: A httplib2.Http object to be used with the request.
  
          Returns:
            None
  
          Raises:
            BatchError if the response is the wrong format.