def sky_cut(self):
        if not self.pick_qs:
            self.fv.showStatus("Please pick an object to set the sky level!")
            return
        loval = self.pick_qs.skylevel
        oldlo, hival = self.fitsimage.get_cut_levels()
        try:
            loval += self.delta_sky
            self.fitsimage.cut_levels(loval, hival)

        except Exception as e:
            self.fv.showStatus((loval) % "No valid sky level: '%s'")
dataset/ETHPy150Open ejeschke/ginga/ginga/misc/plugins/Pick.py/Pick.sky_cut/swapped operands of `%`