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[Python-Dev] Compact ordered set


On Tue, Feb 26, 2019 at 3:43 PM Barry Warsaw <barry at python.org> wrote:

>  The behavior differences between dicts and sets is already surprising to
> many users, so we should be careful not to make the situation worse.
>

It's a nice to have, but other than the fact that we all used to use a dict
when we really wanted a set before set existed, I'm not sure the connection
is there to a layperson.

A mapping and a set type really don't have much to do with each other other
than implementation -- anyone that isn't familiar with python C code, or
hash tables in general, wouldn't likely have any expectation of them having
anything to do with each other.

-CHB


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