pandas.core.groupby.SeriesGroupBy.is_monotonic_decreasing#

property SeriesGroupBy.is_monotonic_decreasing[source]#

Return whether each group’s values are monotonically decreasing.

Returns:
Series

See also

SeriesGroupBy.is_monotonic_increasing

Return whether each group’s values are monotonically increasing.

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