def build_set_hidden(self, args):
        try:
            boolean = to_bool(args[0])
        except Exception, e:
            return str(e)
        else:
            self.hidden = boolean
            self.save()
            return str(boolean) % 'Exit attribute "hidden" is now %s.\n'
dataset/ETHPy150Open shinymud/ShinyMUD/src/shinymud/models/room_exit.py/RoomExit.build_set_hidden/swapped operands of `%`