thank you good sir!

Only way to avoid a timeout. What a dumpster-tier kata. Embarrassing for the creator.

what's wrong about this solution and which would be best practice in this case?

so cool

True, but this was probably a really old answer. That's why I think Codewars shouldn't obfuscate dates. I don't know how exactly, but I'm sure there's a way to solve the issue of really outdated answers (that were great at the time) being presented as best practices to beginners especially in JS and Python katas.

there are better, simpler oneliners

i agreed with you

what this

Why people upvote Best Practice for one liners, it is clever but "Best Practice" no way

No, it doesn't.

Here's a profile of running this problem 10 million times with an if/if/if solution versus an if/elif/else solution:

if_if_if completed 10000000 iterations
Sum time: 5684.13ms
Mean time: 568.41ns
Standard deviation: 1684.53ns

if_elif_else completed 10000000 iterations
Sum time: 5685.18ms
Mean time: 568.52ns
Standard deviation: 1642.49ns

Even if it did, if you care about nanoseconds you shouldn't be choosing different flow control syntax in Python, you should be choosing a different language.

if elif else statement works faster than if if if

Pep8 recomends not to use complex compound statements, like if len(x for x in list) > len (y for y in range(6): return [x for x in list] if A else 0
This is fine i guess