Python中的getter和setter的方法使用详解

class Student(object):
    def __int(self, age=0):
        self._age = age
    
    # getter方法
    def get(self):
        return self._age
    
    # setter方法
    def set(self, value):
        self._age = value
        
xiaoming = Student()
# 使用setter方法设置age
xiaoming.set(20)
# 使用getter方法返回age
print(xiaoming.get())
print(xiaoming._age)

class Adult(object):
    def __int(self):
        self.__age = 0
    
    # 获取属性_age的值
    def get_age(self):
        print('getter() method called')
        return self.__age
    
    # 设置属性_age的值
    def set_age(self, value):
        print('setter() method called')
        self.__age = value
    
    # 删除属性_age
    def del_age(self):
        del self.__age
        
    age = property(get_age, set_age, del_age)

laowang = Adult()
laowang.age = 60
print(laowang.age)

class Adult(object):    
    def __init__(self):
        self.__age = 0
    
    @property
    def age(self):
        print('getter() method called')
        return self.__age
        
    @age.setter
    def age(self, value):
        if value < 18:
            raise ValueError('Sorry, you are a child, games not allowed')
        print('setter() method called')
        self.__age = value
        
xiaoli = Adult()
xiaoli.age = 19
print(xiaoli.age)