Author rhettinger
Recipients Austin Bingham, christian.heimes, gvanrossum, mark.dickinson, rhettinger, robert_smallshire, serhiy.storchaka, tim.peters
Date 2020-10-04.08:35:25
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>  it was added as a concrete method,

That still amounts to making it a requirement for all numeric classes, even ones that predate this patch.  So existing classes that are registered will no longer comply with the ABC.  

In general, it's hard to add methods to ABCs because an ABC makes a promise about what methods are available in any class registered to that ABC.
Date User Action Args
2020-10-04 08:35:25rhettingersetrecipients: + rhettinger, gvanrossum, tim.peters, mark.dickinson, christian.heimes, serhiy.storchaka, robert_smallshire, Austin Bingham
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2020-10-04 08:35:25rhettingercreate