Python中的super()方法使用简介
子类里访问父类的同名属性,而又不想直接引用父类的名字,因为说不定什么时候会去修改它,所以数据还是只保留一份的好。其实呢,还有更好的理由不去直接引用父类的名字,
这时候就该super()登场啦——
class A: def m(self): print('A') class B(A): def m(self): print('B') super().m() B().m()
当然 Python 2 里super() 是一定要参数的,所以得这么写:
class B(A): def m(self): print('B') super(B, self).m()
super在单继承中使用的例子:
class Foo(): def __init__(self, frob, frotz) self.frobnicate = frob self.frotz = frotz class Bar(Foo): def __init__(self, frob, frizzle) super().__init__(frob, 34) self.frazzle = frizzle
此例子适合python 3.x,如果要在python2.x下使用则需要稍作调整,如下代码示例:
class Foo(object): def __init__(self, frob, frotz): self.frobnicate = frob self.frotz = frotz class Bar(Foo): def __init__(self, frob, frizzle): super(Bar,self).__init__(frob,34) self.frazzle = frizzle new = Bar("hello","world") print new.frobnicate print new.frazzle print new.frotz
需要提到自己的名字。这个名字也是动态查找的,在这种情况下替换第三方库中的类会出问题。
`super()`` 很好地解决了访问父类中的方法的问题。

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