Function pivot_first

dask/dataframe/methods.py:465–474

(df, index, columns, values)

def pivot_first(df, index, columns, values):
    return pd.pivot_table(
        df,
        index=index,
        columns=columns,
        values=values,
        aggfunc="first",
        dropna=False,
        observed=False,
    )


def pivot_last(df, index, columns, values):