pandas.Index.nunique — pandas 1.0.1 documentation (original) (raw)

Index. nunique(self, 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

Examples

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