Returns an SFrame with two column positions swapped.

        If inplace == False (default) this operation does not modify the
        current SFrame, returning a new SFrame.

        If inplace == True, this operation modifies the current
        SFrame, returning self.

        Parameters
        ----------
        column_name_1 : string
            Name of column to swap

        column_name_2 : string
            Name of other column to swap

        inplace : bool, optional. Defaults to False.
            Whether the SFrame is modified in place.

        Returns
        -------
        out : SFrame
            The SFrame with swapped columns.

        Examples
        --------
        >>> sf = turicreate.SFrame({'id': [1, 2, 3], 'val': ['A', 'B', 'C']})
        >>> res = sf.swap_columns('id', 'val')
        >>> res
        +-----+-----+
        | val | id  |
        +-----+-----+
        |  A  |  1  |
        |  B  |  2  |
        |  C  |  3  |
        +----+-----+
        [3 rows x 2 columns]

def swap_columns(self, column_name_1, column_name_2, inplace=False):
        """
        Returns an SFrame with two column positions swapped.

        If inplace == False (default) this operation does not modify the
        current SFrame, returning a new SFrame.

        If inplace == True, this operation modifies the current
        SFrame, returning self.

        Parameters
        ----------
        column_name_1 : string
            Name of column to swap

        column_name_2 : string
            Name of other column to swap

        inplace : bool, optional. Defaults to False.
            Whether the SFrame is modified in place.

        Returns
        -------
        out : SFrame
            The SFrame with swapped columns.

        Examples
        --------
        >>> sf = turicreate.SFrame({'id': [1, 2, 3], 'val': ['A', 'B', 'C']})
        >>> res = sf.swap_columns('id', 'val')
        >>> res
        +-----+-----+
        | val | id  |
        +-----+-----+
        |  A  |  1  |
        |  B  |  2  |
        |  C  |  3  |
        +----+-----+
        [3 rows x 2 columns]
        """
        colnames = self.column_names()
        colid_1 = colnames.index(column_name_1)
        colid_2 = colnames.index(column_name_2)

        if inplace:
            ret = self
        else:
            ret = self.copy()

        with cython_context():
            ret.__proxy__.swap_columns(colid_1, colid_2)

        ret._cache = None
        return ret