python 特性属性

实现其它语言中拥有的getter和setter功能
作用：
用来模拟一个属性
通过@property 装饰器可以对模块属性的取值和赋值加以控制
示例见:

class Student:
     def __init__(self, s):
         self.__score__ = s

     @property  # 等价于property(get_score)
     def score(self):
         return self.__score__

     @score.setter
     def score(self,s):
         assert 0 <= s <= 100, "报错"   
         self.__score__ = s

     def get_score(self):
         return self.__score__
     
     def set_score(self,s):
         assert 0 <= s <= 100, "报错"   
         self.__score__ = s

     score = property(get_score)

s1 = Student(50)
print(s1.score)
s1.score = 10000

避免用户随意修改属性

但是可以通过 score = property(get_score,set_score) 这样就可以
print(s1.score)
s1.score = 70 实际上是添加实例变量

• python 方法名都是类变量