On Sat, 10 Sept 2022 at 22:21, Tal Einat <talei...@gmail.com> wrote:
>
> Hello,
>
> I've been working on this PEP [1] on and off for over a year. I think it is 
> now nearly ready for submission to the steering council.
>

>From the expectations on sentinels:

> The sentinel objects should behave as expected by a sentinel object: When 
> compared using
> the is operator, it should always be considered identical to itself but never 
> to any other object.

That would be intrinsically true of ANY object. Did you mean the "=="
operator? (You mention further down that equality should behave that
way, but that identity checks are recommended.)

Otherwise, looks decent.

ChrisA
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