Method add_suffix

pandas/core/generic.py:4812–4880

Suffix labels with string `suffix`. For Series, the row labels are suffixed. For DataFrame, the column labels are suffixed. Parameters ---------- suffix : str The string to add after each label. axis : {0 or 'index', 1 or 'column

(self, suffix: str, axis: Axis | None = None)

    @final
    def add_suffix(self, suffix: str, axis: Axis | None = None) -> Self:
        """
        Suffix labels with string `suffix`.

        For Series, the row labels are suffixed.
        For DataFrame, the column labels are suffixed.

        Parameters
        ----------
        suffix : str
            The string to add after each label.
        axis : {0 or 'index', 1 or 'columns', None}, default None
            Axis to add suffix on

            .. versionadded:: 2.0.0

        Returns
        -------
        Series or DataFrame
            New Series or DataFrame with updated labels.

        See Also
        --------
        Series.add_prefix: Prefix row labels with string `prefix`.
        DataFrame.add_prefix: Prefix column labels with string `prefix`.

        Examples
        --------
        >>> s = pd.Series([1, 2, 3, 4])
        >>> s
        0    1
        1    2
        2    3
        3    4
        dtype: int64

        >>> s.add_suffix("_item")
        0_item    1
        1_item    2
        2_item    3
        3_item    4
        dtype: int64

        >>> df = pd.DataFrame({"A": [1, 2, 3, 4], "B": [3, 4, 5, 6]})
        >>> df
           A  B
        0  1  3
        1  2  4
        2  3  5
        3  4  6

        >>> df.add_suffix("_col")
             A_col  B_col
        0       1       3
        1       2       4
        2       3       5
        3       4       6
        """