def pop(self):
        if len(self.LevelStack) > 0:
            self.Level = self.LevelStack.pop()
        else:
            self.Level = 0
the levestack can not become -1. any attempt to do so
dataset/ETHPy150Open binhex/moviegrabber/lib/site-packages/Cheetah/Utils/Indenter.py/Indenter.pop