Python day 9(2) 参数检查以及多重继承

 1 class Student(object):
 2 
 3     @property  #相当于get_score函数/getter
 4     def score(self):
 5         return self._score
 6 
 7     @score.setter  #相当于set_score函数/setter
 8     def score(self, value):
 9         if not isinstance(value, int):
10             raise ValueError('score must be an integer!')
11         if value < 0 or value > 100:
12             raise ValueError('score must between 0 ~ 100!')
13         self._score = value

1 s = Student()
2 >>> s.score = 60 # OK，实际转化为s.set_score(60)
3 >>> s.score # OK，实际转化为s.get_score()
4 60
5 
6 >>> s.score = 9999
7 Traceback (most recent call last):
8   ...
9 ValueError: score must between 0 ~ 100!

 1 class Student(object):
 2 
 3     @property
 4     def birth(self):
 5         return self._birth
 6 
 7     @birth.setter
 8     def birth(self, value):
 9         self._birth = value
10 
11     @property
12     def age(self):
13         return 2015 - self._birth

1 class Dog(Mammal, Runnable):
2     pass
3 
4 class Bat(Mammal, Flyable):
5     pass

1 class Dog(Mammal, RunnableMixIn, CarnivorousMixIn):
2     pass