pandas.Series.nunique — pandas 3.0.0.dev0+2097.gcdc5b7418e documentation (original) (raw)

• API reference
• Series
• pandas.Series.nunique

Series.nunique(dropna=True)[source]#

Return number of unique elements in the object.

Excludes NA values by default.

Parameters:

dropnabool, default True

Don’t include NaN in the count.

Returns:

int

A integer indicating the number of unique elements in the object.

Examples

s = pd.Series([1, 3, 5, 7, 7]) s 0 1 1 3 2 5 3 7 4 7 dtype: int64