对象的属性隐藏

1.隐藏对象的属性
class Dog:
    def set_age(self,new_age):
        if new_age>0 and new_age<=100:
            self.age = new_age
        else:
            self.age = 0

    def get_age(self):
        return self.age

dog = Dog()
#dog.age = -10
#dog.name = "小白"

#print(dog.age)


dog.set_age(-10)
age = dog.get_age()
print(age)

#dog.get_name()

dog.age = -10
print(dog.age)

2.隐藏对象的属性，私有属性

class Dog:

    def __init__(self, new_name):
        self.name = new_name
        self.__age = 0#定义了一个私有的属性,属性的名字是__age

    def set_age(self,new_age):
        if new_age>0 and new_age<=100:
            self.__age = new_age
        else:
            self.__age = 0

    def get_age(self):
        return self.__age

dog = Dog("小白")
#dog.age = -10
#dog.name = "小白"

#print(dog.age)


dog.set_age(-10)
age = dog.get_age()
print(age)

#dog.get_name()

#dog.__age = -10
print(dog.__age)