[Python-Dev] Third and hopefully final post: PEP 557, Data Classes

Carl Meyer carl at oddbird.net
Wed Nov 29 18:51:16 EST 2017


On 11/29/2017 03:26 PM, Eric V. Smith wrote:
> I've posted a new version of PEP 557, it should soon be available at
> https://www.python.org/dev/peps/pep-0557/.
> 
> The only significant changes since the last version are:
> 
> - changing the "compare" parameter to be "order", since that more
> accurately reflects what it does.
> - Having the combination of "eq=False" and "order=True" raise an
> exception instead of silently changing eq to True.
> 
> There were no other issues raised with the previous version of the PEP.

Not quite; I also raised the issue of isdataclass(ADataClass) returning
False. I still think that's likely to be a cause of bug reports if left
as-is.

Carl

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