(self)
return self.__previous_description
The previous
        :class:`~pymongo.topology_description.TopologyDescription`.
The previous
        :class:`~pymongo.topology_description.TopologyDescription`.
The previous : class : ~pymongo . topology_description . TopologyDescription .
def previous_description(self):
        """The previous
        :class:`~pymongo.topology_description.TopologyDescription`."""
        return self.__previous_description
def previous_description ( self ) : return self . __previous_description