Why bool(None and None is None) is False?

Question

If None and None returns None, (None and None is None) should return True, No?

Was debugging an app and noticed that it returns None

is happens before and for the same reason that * happens before +. All operators in Python have precedence, not just the usual PEMDAS you learn about in early mathematics. — Silvio Mayolo
– Silvio Mayolo, Commented Nov 11, 2022 at 15:24
I skipped these (or don't remember) when I was learning lol. Makes sense now. — 37dev
– 37dev, Commented Nov 11, 2022 at 15:26

svfat · Accepted Answer · 2022-11-11 15:10:53Z

3

Good question!

(None and None is None)

"is" has a priority, so None is None returns True

"and" executed after that, so None and True result in None

If you add parenthesis, you can make it work in another way: ((None and None) is None) returns True

answered Nov 11, 2022 at 15:10

svfat

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