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Why should __prepare__ be explicitly decorated as a @classmethod?

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  Why should __prepare__ be explicitly decorated as a @classmethod? Shriramana Sharma <samjnaa@gmail.com> - 2014-05-17 23:26 -0700
    Re: Why should __prepare__ be explicitly decorated as a @classmethod? Chris Angelico <rosuav@gmail.com> - 2014-05-18 17:18 +1000

#71726 — Why should __prepare__ be explicitly decorated as a @classmethod?

Hello. I did search for this but couldn't find the info anywhere else, so I'm asking here. Please point out if I've missed some other source of the same info:

https://docs.python.org/3/reference/datamodel.html#basic-customization documents that __new__ is special-cased so that while it is actually a static method, it need not be decorated as such. I have a similar question. IIUC __prepare__ is always a class method to be used in metaclasses, so why isn't it also special-cased so that it need not be decorated as a such?

Thanks.

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#71727

On Sun, May 18, 2014 at 4:26 PM, Shriramana Sharma <samjnaa@gmail.com> wrote:
> https://docs.python.org/3/reference/datamodel.html#basic-customization documents that __new__ is special-cased so that while it is actually a static method, it need not be decorated as such. I have a similar question. IIUC __prepare__ is always a class method to be used in metaclasses, so why isn't it also special-cased so that it need not be decorated as a such?

Special cases aren't special enough to break the rules. The less
special cases a language has, the more likely it is to fit inside your
brain, and that's a good thing.

ChrisA

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