1 Dec 2017 1 Dec '17
Since this is easy enough to do in your own code, and I still don't see a use case, I'll just add a note to the PEP and delete isdataclass().
Plus, you can decide for yourself how to deal with the question of returning true for classes or instances or both.
I've updated the PEP and reposted it. The only change is removing isdataclass().