Method chunk

dask/dataframe/dask_expr/_groupby.py:840–844

(df, *by, **kwargs)

    @staticmethod
    def chunk(df, *by, **kwargs):
        if df.ndim == 1:
            df = df.to_frame()
            kwargs = dict(name=df.columns[0], levels=_determine_levels(by))
        return _nunique_df_chunk(df, *by, **kwargs)

    @functools.cached_property
    def chunk_kwargs(self) -> dict:  # type: ignore[override]