Ceph » mgr

    def __get_diff_attrs(disk_days: Sequence[DevSmartT]) -> Tuple[AttrNamesT, AttrDiffsT]:
        """ 
        Get 5 days differential attributes.
        Args:
            disk_days: Refer to function predict(...).
        Returns:
            attr_list: All S.M.A.R.T. attributes used in given disk. Here we
                       use intersection set of all disk days.
            diff_disk_days: A list struct comprises 5 dictionaries, each
                            dictionary contains differential attributes.
        Raises:
            Exceptions of wrong list/dict operations.
        """ 

        all_attrs = [set(disk_day.keys()) for disk_day in disk_days]
        attr_list = list(set.intersection(*all_attrs))
        attr_list = list(disk_days[0].keys())   # ----> According to the above document description, this line is redundant