“超级”在Python中做了什么？ [英] What does 'super' do in Python?

问题描述

有什么区别：

class Child(SomeBaseClass):
    def __init__(self):
        super(Child, self).__init__()

和：

class Child(SomeBaseClass):
    def __init__(self):
        SomeBaseClass.__init__(self)

我见过 super 在只有单一的课程中被大量使用遗产。我可以看到为什么你在多重继承中使用它，但不清楚在这种情况下使用它有什么好处。

I've seen super being used quite a lot in classes with only single inheritance. I can see why you'd use it in multiple inheritance but am unclear as to what the advantages are of using it in this kind of situation.

推荐答案

单继承中 super（）的好处是最小的 - 大多数情况下，您不必将基类的名称硬编码到每个使用其父方法的方法。

The benefits of super() in single-inheritance are minimal -- mostly, you don't have to hard-code the name of the base class into every method that uses its parent methods.

但是，如果没有 super（），几乎不可能使用多重继承。这包括常见的习惯用语，如mixins，接口，抽象类等。这扩展到后来扩展你的代码。如果有人后来想写一个扩展 Child 和mixin的类，他们的代码将无法正常工作。

However, it's almost impossible to use multiple-inheritance without super(). This includes common idioms like mixins, interfaces, abstract classes, etc. This extends to code that later extends yours. If somebody later wanted to write a class that extended Child and a mixin, their code would not work properly.

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