did I just write the single best one liner in a kata?? cant believe myself

It`s look great

vp: vertical position, hp: horizontal position

x, y is ok too, it depends on the coder themselves

why not x, y ...?

join() function joins the elements of the list (in this case ans) together using the string (in this case empty string ''), while lower() changes all characters to lower case.

sir i am new in python may you please tell me what this is doing return ''.join(ans).lower() ?

Yes, that solution is for Python 2.

Something must have changed, this solution won't work anymore

There are rounding issues.

ahh, I must've been blind, thanks!

count your colons! :)

I never would have figured that out. Thanks!

Its not actually mutating the input that you're doing wrong. (JS string are immutable).
However, you are actually mutating your array when you don't mean to.
Hint: Reversing an array mutates it. You can create shallow copy with Array.slice().