Approved

python new test framework is required. updated in this fork

I was inspired by this and came up with another interesting, short solution using numpy's rot90: https://www.codewars.com/kata/reviews/5412ed87648162f1e60000c4/groups/6399b331f70c1e000184df8f

You can very easily turn it into pure python by replacing the last line with a function that goes through the return value in reverse order.

Python example tests use input, a python keyword as a variable.

Python example tests have expected and actual flipped

Approved as 7 kyu.

Thanks a lot for helping me in my first kata!

Ok, fixed! The single-digit example is there, it's the 9 (the stem is 0).

warning with the formatting of the description: prefer to use bullet points for the "important things to notice" (and I'd suggest to put a single digit right into the example above that)

yes (like 100 of them. Well, considering the domain of the problem, 50 with various lengths would be enough, I guess)