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I don't hate leading underscores on _private_function or _class variable, in fact I think it's a great way to semantically signal intent

The double underscore for __super_private_function doesn't make much sense to me though. I can't see a reason why this shouldn't just be a single underscore, especially when __double_underscore__ signals very important python internals

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The leading double underscore functions differently from a leading single underscore in this case:

> Any identifier of the form __spam (at least two leading underscores, at most one trailing underscore) is textually replaced with _classname__spam, where classname is the current class name with leading underscore(s) stripped.

See https://docs.python.org/3/tutorial/classes.html#private-vari...

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