如何单独更改类属性?

时间:2018-03-01 14:34:24

标签: python python-3.x class getter-setter

我读了一些关于吸气剂和二传手的信息,但还没有想到它。我的一个问题是 init 方法中的声明:如果方法需要参数,我怎么才能只改变一个属性?当然也欢迎任何其他方法。

class States:
    def __init__(self, f=0, n=0):
        self.state = n
        self.level_state = f

    @property
    def state(self, n):
        return self._state

    @state.setter
    def state(self, n):
        self._state = n

    @property
    def level_state(self, f):
        return self._level_state

    @level_state.setter
    def state(self, f):
        self._level_state = f

示例情况,单独更改属性:

Situation1:

States().state = 3

Situation2:

States().level_state = 2

1 个答案:

答案 0 :(得分:0)

代码不起作用,因为您已将基础属性命名为与相应属性相同。

您需要使用与getters / setters引用的属性相同的属性名称:

class States:
    def __init__(self, f=0, n=0):
        self._state = n          # <-- changed here
        self._level_state = f    # <-- changed here

    @property
    def state(self, n):
        return self._state

    @state.setter
    def state(self, n):
        self._state = n

    @property
    def level_state(self, f):
        return self._level_state

    @level_state.setter
    def state(self, f):
        self._level_state = f

但这种情况的简单解决方案是根本不使用属性:

class States:
    def __init__(self, f=0, n=0):
        self.state = n
        self.level_state = f
    # done