python, 私有属性详解

　　

　　

class Animal:
    __ORE= 'Animal ore'

    @classmethod
    def getore(cls):
        # 由于是私有属性,所以此处的cls.__ORE已经被解释器替换成cls._Animal_ORE
        print('class: {}\tclassORE: {}'.format(cls.__name__, cls.__ORE))

class Pig(Animal):
    __ORE='Pig ore'

    # @classmethod
    # def getore(cls):
    #     print('class: {}\tclassORE: {}'.format(cls.__name__, cls.__ORE))

p=Pig()
p.getore() # 得到是Animal的__ORE
print(Pig.__dict__) # 只展现在自己类内部定义的属性,不会展现父类属性
# print(Animal.__dict__)

 

 

下面将父类的getore方法override

class Animal:
    __ORE= 'Animal ore'

    @classmethod
    def getore(cls):
        # 由于是私有属性,所以此处的cls.__ORE已经被解释器替换成cls._Animal_ORE
        print('class: {}\tclassORE: {}'.format(cls.__name__, cls.__ORE))

class Pig(Animal):
    __ORE='Pig ore'

    @classmethod
    def getore(cls):
        print('class: {}\tclassORE: {}'.format(cls.__name__, cls.__ORE))

p=Pig()
p.getore() # 得到是Animal的__ORE
print(Pig.__dict__) # 只展现在自己类内部定义的属性,不会展现父类属性
# print(Animal.__dict__)

　　

 

 getore获取到的是Pig的私有属性了

 

做一个深入的实验

class Animal:
    __ORE= 'Animal ore'

    @classmethod
    def getore(cls):
        # 由于是私有属性,所以此处的cls.__ORE已经被解释器替换成cls._Animal_ORE
        print('class: {}\tclassORE: {}'.format(cls.__name__, cls.__ORE))

class Pig(Animal):
    __ORE='Pig ore'
    _Animal__ORE='Pig phony ORE'

    # @classmethod
    # def getore(cls):
    #     print('class: {}\tclassORE: {}'.format(cls.__name__, cls.__ORE))

p=Pig()
p.getore() # 得到是Animal的__ORE
print(Pig.__dict__) # 只展现在自己类内部定义的属性,不会展现父类属性
# print(Animal.__dict__)

自定义一个跟替换后同名的属性于Pig类中

 

 

标签：__,.__,python,Pig,私有,详解,Animal,ORE,cls
来源： https://www.cnblogs.com/dissipate/p/13767173.html