def _display_world_coords(self, x, y):

        if self._display_coords_index == -1:
            return "%s %s (pixel)" % (x, y)

        pixel = np.array([x, y])

        coords = self._all_coords[self._display_coords_index]

        world = coords._transform.transform(np.array([pixel]))[0]

        xw = coords[self._x_index].format_coord(world[self._x_index])
        yw = coords[self._y_index].format_coord(world[self._y_index])

        if self._display_coords_index == 0:
            system = "world"
        else:
            system = "world, overlay {0}".format(self._display_coords_index)

        coord_string = (xw, yw, system) % "%s %s (%s)"

        return coord_string
dataset/ETHPy150Open glue-viz/glue/glue/external/wcsaxes/core.py/WCSAxes._display_world_coords/swapped operands of `%`