It depends on what you're working on. If this function were part of a website backend counting characters in usernames or something, it doesn't really matter at all. But if this is a helper function that is responsible for comparing billions of base pairs in genetic sequencing or part of a stock trading platform where microseconds matter, then you need to rethink it.

Would it matter? I assume itll be a O(2n) vs O(n) but I'm not sure if that's a big deal.

Hi! Really helpfull, thank you!

Another piece of information which was missing (or I could not deduce it from the kata details): the "Dot" letter has an influence on the notch. As a matter of fact, the dot letter leads to an offset between the notch and the visible position in the window.

If notch is "Q" and dot letter is "A", then the notch causes rotation when "Q" is diplayed in the window.
If notch is "Q" and dot letter is "Z", then the notch causes rotation when "P" is diplayed in the window, because Z has an offset of 25 towards A (0 position) => Q + offset of 25 gives "P".
If notch is "Q" and dot letter is "M", then the notch causes rotation when "C" is diplayed in the window, because N has an offset of 12 towards A (0 position) => Q + offset of 12 gives "C"

anybody that knows more than print("Hello World!") finds this code readable.

actual solution that should be voted best practice. this site really needs a downvote button to downvote shit answers

What does the n != do

xrange is Python 2, it was removed in Python 3. It is a very old solution, written when CW used Python 2.

my pycharm wrote that this line is wrong:

return sum(n % x < 1 for x in xrange(1, n + 1))

If I try "range" insted of "xrange", it is good

self.dimension, dimension have the same id.

Lol, me too. In case I need to translate it to C later.

same!

because the func compare 2 sets ! originally ascii is a string ! You cant compare 2 different types !