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

SeriesGroupBy.unique()[source]#

Return unique values for each group.

It returns unique values for each of the grouped values. Returned in order of appearance. Hash table-based unique, therefore does NOT sort.

Returns:

Series

Unique values for each of the grouped values.

See also

Series.unique

Return unique values of Series object.

Examples

df = pd.DataFrame( ... [ ... ("Chihuahua", "dog", 6.1), ... ("Beagle", "dog", 15.2), ... ("Chihuahua", "dog", 6.9), ... ("Persian", "cat", 9.2), ... ("Chihuahua", "dog", 7), ... ("Persian", "cat", 8.8), ... ], ... columns=["breed", "animal", "height_in"], ... ) df breed animal height_in 0 Chihuahua dog 6.1 1 Beagle dog 15.2 2 Chihuahua dog 6.9 3 Persian cat 9.2 4 Chihuahua dog 7.0 5 Persian cat 8.8 ser = df.groupby("animal")["breed"].unique() ser animal cat [Persian] dog [Chihuahua, Beagle] Name: breed, dtype: object