pandas.core.resample.Resampler.nunique — pandas 2.2.3 documentation (original) (raw)

final Resampler.nunique(*args, **kwargs)[source]#

Return number of unique elements in the group.

Returns:

Series

Number of unique values within each group.

Examples

For SeriesGroupby:

lst = ['a', 'a', 'b', 'b'] ser = pd.Series([1, 2, 3, 3], index=lst) ser a 1 a 2 b 3 b 3 dtype: int64 ser.groupby(level=0).nunique() a 2 b 1 dtype: int64

For Resampler:

ser = pd.Series([1, 2, 3, 3], index=pd.DatetimeIndex( ... ['2023-01-01', '2023-01-15', '2023-02-01', '2023-02-15'])) ser 2023-01-01 1 2023-01-15 2 2023-02-01 3 2023-02-15 3 dtype: int64 ser.resample('MS').nunique() 2023-01-01 2 2023-02-01 1 Freq: MS, dtype: int64