Fixed

The error messages are in the wrong order.

They give " should be " rather than the other way around

Thanks. Good suggestion! I removed it from the initial solution and put it into the tests.

Tests should import random explicitly, rather than relying on the user's solution to do that

In the example and submit tests,

• the second it title contains two times the word return.
• The fourth it title says false instead of None.

Yes, much better. Although, only the examples show to pick elements from the right. I've been going through the array from left to right all the time, moving elements to the right.

You're totally right. Thanks for pointing this out. I modified the description following your suggestion.

The description says to first rotate the array, then check if it's bookended.

The tests however require the array to be returned as is if it's already bookended without rotation

I don't think the description should state that you need a recursive function.

Some of the solutions don't use a recursive function, that's only one way of solving the kata

Thanks ! I was suprised it wasn't on OEIS yet. I'm glad that such autistic idea came to someone else too.

Just link the video that completely coincidentally was released at the same time as the kata https://www.youtube.com/watch?v=c066hLi78B0

.

Or maybe not. Whatever, your kata, not my responsibility, precompute 10001 fixes it.

Sorry, don't think it's an off-by-one error actually, I think this

        while p * p < n:

should have an <= instead of a <.