How to use the mercantile.__init__.ParentTileError function in mercantile

Tile(x=0, y=0, z=0)

    """
    tile = _parse_tile_arg(*tile)

    # zoom is a keyword-only argument.
    zoom = kwargs.get("zoom", None)

    if zoom is not None and (tile[2] < zoom or zoom != int(zoom)):
        raise InvalidZoomError(
            "zoom must be an integer and less than that of the input tile"
        )

    x, y, z = tile
    if x != int(x) or y != int(y) or z != int(z):
        raise ParentTileError("the parent of a non-integer tile is undefined")

    target_zoom = z - 1 if zoom is None else zoom

    # Algorithm heavily inspired by https://github.com/mapbox/tilebelt.
    return_tile = tile
    while return_tile[2] > target_zoom:
        xtile, ytile, ztile = return_tile
        if xtile % 2 == 0 and ytile % 2 == 0:
            return_tile = Tile(xtile // 2, ytile // 2, ztile - 1)
        elif xtile % 2 == 0:
            return_tile = Tile(xtile // 2, (ytile - 1) // 2, ztile - 1)
        elif not xtile % 2 == 0 and ytile % 2 == 0:
            return_tile = Tile((xtile - 1) // 2, ytile // 2, ztile - 1)
        else:
            return_tile = Tile((xtile - 1) // 2, (ytile - 1) // 2, ztile - 1)
    return return_tile