Adds bounds axes.  Shows the bounds of the most recent input
        mesh unless mesh is specified.

        Parameters
        ----------
        mesh : vtkPolydata or unstructured grid, optional
            Input mesh to draw bounds axes around

        bounds : list or tuple, optional
            Bounds to override mesh bounds.
            [xmin, xmax, ymin, ymax, zmin, zmax]

        show_xaxis : bool, optional
            Makes x axis visible.  Default True.

        show_yaxis : bool, optional
            Makes y axis visible.  Default True.

        show_zaxis : bool, optional
            Makes z axis visible.  Default True.

        show_xlabels : bool, optional
            Shows x labels.  Default True.

        show_ylabels : bool, optional
            Shows y labels.  Default True.

        show_zlabels : bool, optional
            Shows z labels.  Default True.

        italic : bool, optional
            Italicises axis labels and numbers.  Default False.

        bold : bool, optional
            Bolds axis labels and numbers.  Default True.

        shadow : bool, optional
            Adds a black shadow to the text.  Default False.

        font_size : float, optional
            Sets the size of the label font.  Defaults to 16.

        font_family : string, optional
            Font family.  Must be either courier, times, or arial.

        color : string or 3 item list, optional
            Color of all labels and axis titles.  Default white.
            Either a string, rgb list, or hex color string.  For example:

                color='white'
                color='w'
                color=[1, 1, 1]
                color='#FFFFFF'

        xlabel : string, optional
            Title of the x axis.  Default "X Axis"

        ylabel : string, optional
            Title of the y axis.  Default "Y Axis"

        zlabel : string, optional
            Title of the z axis.  Default "Z Axis"

        use_2d : bool, optional
            A bug with vtk 6.3 in Windows seems to cause this function
            to crash this can be enabled for smoother plotting for
            other enviornments.

        grid : bool or str, optional
            Add grid lines to the backface (``True``, ``'back'``, or
            ``'backface'``) or to the frontface (``'front'``,
            ``'frontface'``) of the axes actor.

        location : str, optional
            Set how the axes are drawn: either static (``'all'``),
            closest triad (``front``), furthest triad (``'back'``),
            static closest to the origin (``'origin'``), or outer
            edges (``'outer'``) in relation to the camera
            position. Options include: ``'all', 'front', 'back',
            'origin', 'outer'``

        ticks : str, optional
            Set how the ticks are drawn on the axes grid. Options include:
            ``'inside', 'outside', 'both'``

        all_edges : bool, optional
            Adds an unlabeled and unticked box at the boundaries of
            plot. Useful for when wanting to plot outer grids while
            still retaining all edges of the boundary.

        corner_factor : float, optional
            If ``all_edges````, this is the factor along each axis to
            draw the default box. Dafuault is 0.5 to show the full box.

        loc : int, tuple, or list
            Index of the renderer to add the actor to.  For example,
            ``loc=2`` or ``loc=(1, 1)``.  If None, selects the last
            active Renderer.

        padding : float, optional
            An optional percent padding along each axial direction to cushion
            the datasets in the scene from the axes annotations. Defaults to
            have no padding

        Returns
        -------
        cube_axes_actor : vtk.vtkCubeAxesActor
            Bounds actor

        Examples
        --------
        >>> import vtki
        >>> from vtki import examples
        >>> mesh = vtki.Sphere()
        >>> plotter = vtki.Plotter()
        >>> _ = plotter.add_mesh(mesh)
        >>> _ = plotter.show_bounds(grid='front', location='outer', all_edges=True)
        >>> plotter.show() # doctest:+SKIP

def show_bounds(self, mesh=None, bounds=None, show_xaxis=True,
                        show_yaxis=True, show_zaxis=True, show_xlabels=True,
                        show_ylabels=True, show_zlabels=True, italic=False,
                        bold=True, shadow=False, font_size=None,
                        font_family=None, color=None,
                        xlabel='X Axis', ylabel='Y Axis', zlabel='Z Axis',
                        use_2d=False, grid=None, location='closest', ticks=None,
                        all_edges=False, corner_factor=0.5, fmt=None,
                        minor_ticks=False, loc=None, padding=0.0):
        """
        Adds bounds axes.  Shows the bounds of the most recent input
        mesh unless mesh is specified.

        Parameters
        ----------
        mesh : vtkPolydata or unstructured grid, optional
            Input mesh to draw bounds axes around

        bounds : list or tuple, optional
            Bounds to override mesh bounds.
            [xmin, xmax, ymin, ymax, zmin, zmax]

        show_xaxis : bool, optional
            Makes x axis visible.  Default True.

        show_yaxis : bool, optional
            Makes y axis visible.  Default True.

        show_zaxis : bool, optional
            Makes z axis visible.  Default True.

        show_xlabels : bool, optional
            Shows x labels.  Default True.

        show_ylabels : bool, optional
            Shows y labels.  Default True.

        show_zlabels : bool, optional
            Shows z labels.  Default True.

        italic : bool, optional
            Italicises axis labels and numbers.  Default False.

        bold : bool, optional
            Bolds axis labels and numbers.  Default True.

        shadow : bool, optional
            Adds a black shadow to the text.  Default False.

        font_size : float, optional
            Sets the size of the label font.  Defaults to 16.

        font_family : string, optional
            Font family.  Must be either courier, times, or arial.

        color : string or 3 item list, optional
            Color of all labels and axis titles.  Default white.
            Either a string, rgb list, or hex color string.  For example:

                color='white'
                color='w'
                color=[1, 1, 1]
                color='#FFFFFF'

        xlabel : string, optional
            Title of the x axis.  Default "X Axis"

        ylabel : string, optional
            Title of the y axis.  Default "Y Axis"

        zlabel : string, optional
            Title of the z axis.  Default "Z Axis"

        use_2d : bool, optional
            A bug with vtk 6.3 in Windows seems to cause this function
            to crash this can be enabled for smoother plotting for
            other enviornments.

        grid : bool or str, optional
            Add grid lines to the backface (``True``, ``'back'``, or
            ``'backface'``) or to the frontface (``'front'``,
            ``'frontface'``) of the axes actor.

        location : str, optional
            Set how the axes are drawn: either static (``'all'``),
            closest triad (``front``), furthest triad (``'back'``),
            static closest to the origin (``'origin'``), or outer
            edges (``'outer'``) in relation to the camera
            position. Options include: ``'all', 'front', 'back',
            'origin', 'outer'``

        ticks : str, optional
            Set how the ticks are drawn on the axes grid. Options include:
            ``'inside', 'outside', 'both'``

        all_edges : bool, optional
            Adds an unlabeled and unticked box at the boundaries of
            plot. Useful for when wanting to plot outer grids while
            still retaining all edges of the boundary.

        corner_factor : float, optional
            If ``all_edges````, this is the factor along each axis to
            draw the default box. Dafuault is 0.5 to show the full box.

        loc : int, tuple, or list
            Index of the renderer to add the actor to.  For example,
            ``loc=2`` or ``loc=(1, 1)``.  If None, selects the last
            active Renderer.

        padding : float, optional
            An optional percent padding along each axial direction to cushion
            the datasets in the scene from the axes annotations. Defaults to
            have no padding

        Returns
        -------
        cube_axes_actor : vtk.vtkCubeAxesActor
            Bounds actor

        Examples
        --------
        >>> import vtki
        >>> from vtki import examples
        >>> mesh = vtki.Sphere()
        >>> plotter = vtki.Plotter()
        >>> _ = plotter.add_mesh(mesh)
        >>> _ = plotter.show_bounds(grid='front', location='outer', all_edges=True)
        >>> plotter.show() # doctest:+SKIP
        """
        kwargs = locals()
        _ = kwargs.pop('self')
        _ = kwargs.pop('loc')
        self._active_renderer_index = self.loc_to_index(loc)
        renderer = self.renderers[self._active_renderer_index]
        renderer.show_bounds(**kwargs)