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

Eric V. Smith eric at trueblade.com
Wed Nov 29 18:26:12 EST 2017

I've posted a new version of PEP 557, it should soon be available at 

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.

So with that, I think it's ready for a pronouncement.


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