__init__.py 文件源码

def _get_more(self, callback):
        """
        Get a batch of data asynchronously, either performing an initial query
        or getting more data from an existing cursor.
        :Parameters:
         - `callback`:    function taking parameters (batch_size, error)
        """
        if not self.alive:
            raise pymongo.errors.InvalidOperation(
                "Can't call get_more() on a MotorCursor that has been"
                " exhausted or killed.")

        self.started = True
        self._refresh(callback=callback)