1、基本的@property使用,可以把函数当做属性用
class Person(object): @property def get_name(self): print('我叫xxx') def main(): person = Person() person.get_name if __name__ == '__main__': main()
2、@property的set,deleter,get
class Goods(object): @property def price(self): print('@property') @price.setter def price(self,value): print('@price.setter:'+str(value)) @price.deleter def price(self): print('@price.deleter') obj = Goods() obj.price = 50 obj.price del obj.price
3、@property demo
class Goods(object): def __init__(self): #原价 self.original_price = 100 #折扣 self.discount = 0.8 @property def price(self): #实际价格=原价*折扣 new_price = self.original_price*self.discount return new_price @price.setter def price(self,value): self.original_price = value @price.deleter def price(self): del self.original_price obj = Goods() obj.price obj.price = 200 del obj.price
4、property函数使用
class Foo(object): def get_name(self): print('get_name') return 'laowang' def set_name(self, value): '''必须两个参数''' print('set_name') return 'set value' + value def del_name(self): print('del_name') return 'laowang' NAME = property(get_name, set_name, del_name, 'description.') obj = Foo() obj.NAME #调用get方法 obj.NAME = 'alex' #调用set方法 desc = Foo.NAME.__doc__ #调用第四个描述 print(desc) del obj.NAME #调用第三个删除方法
5、property函数操作私有属性的get和set方法
class Person(object): def __init__(self, age): self.__age = age def set_age(self, value): self.__age = value def get_age(self): return self.__age AGE = property(get_age, set_age) person = Person(15) person.AGE = 20 print(str(person.AGE))