Great

This is insightful.

smart!

Thank you so much.
New for me - isalpha and enumerate
Very powerfull mechanics

Why is creating a new object successful for this Kata whereas if chars[index] = chars[index].upper() is used all outputs are Uppercase?

Here's a quick breakdown comparing:

x = y

x = y[:]

x = y.copy()

https://www.programiz.com/python-programming/methods/list/copy

yes, [:] creates a new object

Yes, the last is another reference to the same list, not a copy at all.

Is there difference between copy = chars[:] and copy = chars?

+1 Issue with Python

It should work for random inputs too: [76, -1, -1] should equal [-1, -1, -1]```

If I'm understanding the kata, my answer of `[76, -1, -1]` should be correct, right?

Added a separate note in the description to clarify.