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Author rhettinger
Recipients Claudiu.Popa, CuriousLearner, belopolsky, berker.peksag, eric.araujo, gvanrossum, ncoghlan, rhettinger
Date 2019-08-10.05:48:38
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I looked into this a bit more and don't see another non-invasive way of blocking instantiation.

Marking for Guido to take a look at.  He's the expert on ABCs and typing and is the originator of the __hash__ = None approach to turning off hashability.

Guido, would you like number subclasses to require an override of __hash__ or is the accidental instantiation of Number() something we even care about (I think this unlikely to ever arise in practice)?  My suggestion is to deem it harmless and leave it as is.
Date User Action Args
2019-08-10 05:48:38rhettingersetrecipients: + rhettinger, gvanrossum, ncoghlan, belopolsky, eric.araujo, Claudiu.Popa, berker.peksag, CuriousLearner
2019-08-10 05:48:38rhettingersetmessageid: <>
2019-08-10 05:48:38rhettingerlinkissue16837 messages
2019-08-10 05:48:38rhettingercreate