Cleanest solution so far

yeah but the problem was too

That feeling when you submit the identical answer as a 1 dan :)

examples could have been more elaborative

Sorry, now all works correct. But i don't undestend, how you use "this" in row function. "this" in row function it's "Window', isn't?

It works fine for me.

If i copy-past this solution to testing in task, it does not work!!!!
Why this solution here?

Example.
Given number 743.543;
You need return 0.543;
NOT 0.5

bump

You can increase the recursion limit (in your solution) by importing sys
and using sys.setrecursionlimit()
Probably not recommended, but it sure feels good thwarting Guido Van Rossum's will. Sorry Guido.
The problem with learning recursion is that the examples that are easy(ish) to understand,
are usually terrible examples of how to actually use it.

check what type (Number or String) you return

C# translation(author inactive)

Log
-43778003.52020738
Expected value near 5.2020738000000e-1, but got 4.7979261726141e-1

All Ok?....