pandas.core.groupby.SeriesGroupBy.is_monotonic_decreasing — pandas 3.0.0.dev0+2097.gcdc5b7418e documentation (original) (raw)

• API reference
• GroupBy
• pandas.core.groupby.SeriesGroupBy.is_monotonic_decreasing

property SeriesGroupBy.is_monotonic_decreasing[source]#

Return whether each group’s values are monotonically decreasing.

Returns:

Series

Examples

s = pd.Series([2, 1, 3, 4], index=["Falcon", "Falcon", "Parrot", "Parrot"]) s.groupby(level=0).is_monotonic_decreasing Falcon True Parrot False dtype: bool