rebeccaMyKid
V2EX  ›  问与答

子类的变量在父类里用,感觉有点问题,有更好的写法吗?

  •  
  •   rebeccaMyKid · Aug 17, 2017 · 1146 views
    This topic created in 3196 days ago, the information mentioned may be changed or developed.
    #python
    
    class Parent(object):
        def __init__(self):
            pass
        
        def print_sth(self):
            print self.name
            
            
    class ChildA(Parent):
        def __init__(self):
            self.name = 'childA'    
            super(ChildA, self).__init__()
        
        
    class ChildB(Parent):
        def __init__(self):
            self.name = 'childB'    
            super(ChildB, self).__init__()
    
    
    class ChildC(Parent):
        def __init__(self):
            self.name = 'childC'    
            super(ChildC, self).__init__()
    
    children = [
        ChildA(),
        ChildB(),
        ChildC()
    ]
    
    for child in children:
        child.print_sth()
    

    父类有个方法是要用到子类的属性的,然后这个属性又是 hardcode,这样写能跑,但是感觉好像不太好,又想不到其他的方法,面向对象老司机能给点建议吗?

    1 replies    2017-08-17 21:32:28 +08:00
    wwqgtxx
        1
    wwqgtxx  
       Aug 17, 2017 via iPhone   ❤️ 1
    在父类的__init__中定义这个 name,然后给父类的__init__加上 name 这个参数,子类在调用 super 的时候把 name 传进去就好了
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