dask.dataframe.Series.nunique

Series.nunique(split_every=None)[source]

Return number of unique elements in the object.

This docstring was copied from pandas.core.series.Series.nunique.

Some inconsistencies with the Dask version may exist.

Excludes NA values by default.

Parameters
dropnabool, default True (Not supported in Dask)

Don’t include NaN in the count.

Returns
int

See also

DataFrame.nunique

Method nunique for DataFrame.

Series.count

Count non-NA/null observations in the Series.

Examples

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