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6 年
二、构造(`__new__`)和初始化(`__init__`)
通过之前的学习,我们已经知道定义一个类时,我们经常会通过 `__init__(self)` 的方法在实例化对象的时候,对属性进行设置。 实际上,创建一个类的过程是分为两步的,一步是创建类的对象,还有一步就是对类进行初始化。 `__new__` 是用来创建类并返回这个类的 ...
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