【7.1】property动态属性

 1 #!/user/bin/env python
 2 # -*- coding:utf-8 -*-
 3 from datetime import date, datetime
 4 
 5 
 6 class User:
 7     def __init__(self, name, birthday):
 8         self.name = name
 9         self.birthday = birthday
10         self._age = 0
11 
12     def get_age(self):
13         return datetime.now().year - self.birthday.year
14 
15     @property
16     def age(self):
17         return datetime.now().year - self.birthday.year
18 
19     @age.setter
20     def age(self, value):
21         self._age = value
22 
23 
24 # 这里使用 __name__ = ‘__main__‘ 条件判断是为了，在其他模块中引用的时候，不会执行测试代码
25 if __name__ == ‘__main__‘:
26     user = User(‘zy‘, date(year=1998, month=6, day=8))
27     user.age = 30
28     print(user._age)
29     print(user.age)
30     print(user.get_age())