you'll get there

a suggestion is a concrete proposition to improve a kata.

regarding your message: the original point of this kata was to correct a very common programming mistake with the switch statement. As usual with bugfix katas, the Python translation completely missed the point of the kata, because Python has no switch and because scopes in Python work differently than in most other languages. As a result the Python version does not make much sense, and has little teaching value

I really think this one should be marked up as a 7 kata. It's pretty tricky... until you see the solution of course.

i thinл auther wanted us to notice pattern.

Please use appropriate formatting when posting code. See https://docs.codewars.com/training/troubleshooting/#post-discourse.

why my code works but it shows me i passed two tests and failed one

Your code doesn't work, it computes the square of each number incorrectly. You also don't need to call your function yourself as the tests are responsible for that.

Seeing you're new to codewars, I recommend reading this article: https://docs.codewars.com/training/training-example/.