私有名称重整有什么好处? [英] What is the benefit of private name mangling?

问题描述

Python 为类方法和属性提供私有名称修改.

Python provides private name mangling for class methods and attributes.

是否有任何具体情况需要此功能，还是只是从 Java 和 C++ 继承而来?

Are there any concrete cases where this feature is required, or is it just a carry over from Java and C++?

请描述一个应该使用 Python 名称修饰的用例(如果有)?

另外，我对作者只是试图防止意外的外部属性访问的情况不感兴趣.我相信这个用例与 Python 编程模型不一致.

Also, I'm not interested in the case where the author is merely trying to prevent accidental external attribute access. I believe this use case is not aligned with the Python programming model.

推荐答案

部分是为了防止意外的内部属性访问.举个例子:

It's partly to prevent accidental internal attribute access. Here's an example:

在您的代码中，这是一个库:

In your code, which is a library:

class YourClass:
    def __init__(self):
        self.__thing = 1           # Your private member, not part of your API

在我的代码中，我从您的库类继承:

In my code, in which I'm inheriting from your library class:

class MyClass(YourClass):
    def __init__(self):
        # ...
        self.__thing = "My thing"  # My private member; the name is a coincidence

如果不修改私人名称，我不小心重复使用你的名字会破坏你的图书馆.

Without private name mangling, my accidental reuse of your name would break your library.

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