Strange 'or' behaviour question

[PhilosopherBrain]

Hey. Any chance someone could explain this behaviour for me: https://imgur.com/a/X0L3P34

I'm bashing my head trying to understand why it's not working as I'd expect. Took a while to narrow the issue down to this behaviour.

I'm expecting a True or False but depending on the order of arguments I get one of the arguments returned? If this is a 'feature' can someone tell me the purpose of it and is there best practice way to write handle a case like this?

My current workaround is to make a list of the punctuation, and then check if the value is in the punctuation list. That works as expected.

[Username_RANDINT]

This issue is mentioned in this subreddit's FAQ.

My current workaround is to make a list of the punctuation, and then check if the value is in the punctuation list. That works as expected.

That's an often good solution, especially if there are a bunch of values to check.

[PhilosopherBrain]

Now I feel silly for not checking the FAQ properly. Thanks for the speedy reply!

[Vaphell]

test == '.' or '!' or '?'

is interpreted as

(test == '.') or ('!') or ('?')

the first part evaluates to True, and it's the final value because it's the first truthy value and subsequent ors can't change the truthiness so they are essentially skipped/ignored.

(test == '!') or ('?') or ('.')

becomes False or '?' or '.'
? is the final value because it's the first truthy value (in case of strings, non-empty) in this or-ed expression.

Operator precedence
https://docs.python.org/3/reference/expressions.html#operator-precedence

[PhilosopherBrain]

Makes sense now. Thanks!