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advance-python's Issues

你好，看了这个抽象基类的代码，想请教个问题

抽象基类总的来说和接口类似，是一个“不完整的”类，因为其内部可以有已经实现的方法，也有需要子类重新写的方法。但是我也可以定义一个父类，在父类中定义一个方法，但是只是定义，然后在方法中使用如下代码抛出异常,当子类中没有定义该方法的时候就会报错，提示子类中必须提供该方法，这种和抽象基类的应用是否存在冲突呢？或者说是都能实现，只是方式不同罢了？

raise NotImplementedError(
'subclasses of SiteBase must provide an find() method')

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