@property关键字

class Cell:
    _a = 'a'
    @property
    def state(self):
        return self._a
    @state.setter
    def state(self,value):
        self._a = value
if __name__ == '__main__':
    c = Cell()
    c.stare = 'b'  #设置
    print(c.state)  #读取