@flaybe: if you're interested in authoring kata, you should read the whole documentation about it before your next try.

I'll unpublish this one and suggest you don't repbulish it (unless you plan on losing even more points because of the downvotes the kata will get until it gets automatically reitred).

Cheers

Hello, some issues:

• No random tests.
• Incorrect solution setup.
• Trivial task (has been done before).

There is no such test, you're confusing the logs, you returned [1,2,3,4] instead of None, print the input.

When you see in Python an error like this:

[1,2,3,4] should equal None

The first value is what your function wrongly returned, the second value is the expected one, to know the input value, you should print it and it'll appear above the test result, read this: https://docs.codewars.com/training/troubleshooting#print-input

Why should [1, 2, 3, 4,] == None and not [1, 2, 3, 5,]?