(self, old_snapshot, key_type, cumulative=False)
return statistics
Compute the differences with an old snapshot old_snapshot. Get
        statistics as a sorted list of StatisticDiff instances, grouped by
        group_by.
Compute the differences with an old snapshot old_snapshot. Get
        statistics as a sorted list of StatisticDiff instances, grouped by
        group_by.
Compute the differences with an old snapshot old_snapshot . Get statistics as a sorted list of StatisticDiff instances grouped by group_by .
def compare_to(self, old_snapshot, key_type, cumulative=False):
        """
        Compute the differences with an old snapshot old_snapshot. Get
        statistics as a sorted list of StatisticDiff instances, grouped by
        group_by.
        """
        new_group = self._group_by(key_type, cumulative)
        old_group = old_snapshot._group_by(key_type, cumulative)
        statistics = _compare_grouped_stats(old_group, new_group)
        statistics.sort(reverse=True, key=StatisticDiff._sort_key)
        return statistics
def compare_to ( self , old_snapshot , key_type , cumulative = False ) : new_group = self . _group_by ( key_type , cumulative ) old_group = old_snapshot . _group_by ( key_type , cumulative ) statistics = _compare_grouped_stats ( old_group , new_group ) statistics . sort ( reverse = True , key = StatisticDiff . _sort_key ) return statistics