property属性和函数

1.property属性
class Women:
    def __init__(self,age):
        self.age=age
    @property   //函数名必须和参数名称一致
    def age(self):
        return self.age
    @age.setter     //必须为参数名.setter
    def age(self,age):
        if age>0 and age<100:
            self.age=age
        else:
            age=0

w=Women(15)
w.age=50     //设置age的值
print(w.age)

2.property函数   property(fget=None, fset=None, fdel=None, doc=None)

class Person:
    def __init__(self,name):
        self.name=name
    def get_name(self):
        print("fetch")
        return self.name
    def set_name(self,name):
        print("change")
        self.name=name
    def del_name(self):
        print("remove")
        del self.name
    name=property(get_name,set_name,del_name,'name property docs')
    #name=property(get_name,set_name)   //可以设置get，set方法
p=Person('Bob')
p.name="smith"
print(p.name)
del p.name
print(Person.name.__doc__)