在子类派生出新发方式中重用父类的方法,有两种实现方式
1.指名道姓(不依赖继承)
# class Hero:
# def __init__(self,nickname,life_value,aggresivity):
# self.nickname=nickname
# self.life_value=life_value
# self.aggresivity=aggresivity
# def attack(self,enemy):
# enemy.life_value-=self.aggresivity
#
# class Garen(Hero):
# camp='demacia'
# def __init__(self,nickname,life_value,aggresivity,weapon):
# Hero.__init__(self,nickname,life_value,aggresivity)
# self.weapon=weapon
#
# def attack(self,enemy):
# Hero.attack(self,enemy) #1,指名道姓
# print('from Garen class')
#
# class Riven(Hero):
# camp='NOXUS'
#
#
# g=Garen('草丛伦',100,30,'金箍棒')
# r=Riven('锐雯雯',80,35)
# print(g.__dict__)
# print(r.life_value)
# g.attack(r)
# print(r.life_value)
'''
# 2.super() (依赖继承)
class Hero:
def __init__(self,nickname,life_value,aggresivity):
self.nickname=nickname
self.life_value=life_value
self.aggresivity=aggresivity
def attack(self,enemy):
enemy.life_value-=self.aggresivity
class Garen(Hero):
camp='demacia'
def attack(self,enemy):
super(Garen,self).attack(enemy) #依赖继承
print('from Garen class')
class Riven(Hero):
camp='Noxus'
g=Garen('草丛伦',100,30)
r=Riven('锐雯雯',80,35)
g.attack(r)
print(r.life_value)
'''
'''
class Hero:
def __init__(self,nickname,life_value,aggresivity):
self.nickname=nickname
self.life_value=life_value
self.aggresivity=aggresivity
def attack(self,enemy):
enemy.life_value-=self.aggresivity
class Garen(Hero):
camp='demacia'
def __init__(self,nickname,life_value,aggresivity,weapon):
# self.nickname = nickname
# self.life_value = life_value
# self.aggresivity = aggresivity
# self.weapon = weapon
# Hero.__init__(self,nickname,life_value,aggresivity)
#super(Garen,self).__init__(nickname,life_value,aggresivity) #依赖继承
super().__init__(nickname,life_value,aggresivity) #依赖继承(Python3)
self.weapon=weapon
def attack(self,enemy):
Hero.attack(self,enemy) #指名道姓重用
print('from Garen class')
class Riven(Hero):
camp='NOXUS'
g=Garen('草丛伦',100,30,'金箍棒')
r=Riven('锐雯雯',80,35)
print(g.__dict__)
print(r.life_value)
g.attack(r)
print(r.life_value)
'''
那么super是怎么实现在父类中查找的呢
一个小验证方法:
class A:
def f1(self):
print('from A')
super().f1()
class B:
def f1(self):
print('from B')
class C(A,B):
pass
print(C.mro())
c=C()
c.f1()
返回:
[<class '__main__.C'>, <class '__main__.A'>, <class '__main__.B'>, <class 'object'>] #C.mro() c的查找顺序,新式类(python3特有)
from A
from B
以上看出父类重用,是子类以mro()的顺序查找的,不论父类之间有没有继承关系
PS mro()'老子才不管你老子是谁,老子只按老子的查找顺序查找'