[devanl]

This feels a bit like a case of a "Python from 10 years ago in my head" vs "Python from 10 years ago in reality" meme.

Chained comparisons have been in Python since I started using it at 2.1. It looks to me like they've been there since at least 1.4:

https://docs.python.org/release/1.4/tut/node40.html#SECTION0...

[Animats]

Ah. I'm thinking of [1] from 2016, when there was a plan to add short-cut evaluation to short-cut comparisons. That avoids evaluating all the terms when not necessary. But that was deferred.

[1] https://peps.python.org/pep-0535/

[DonHopkins]

That's so lazy!