Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
I got the same error. I was wondering if my maths were the problem but apparently not!
Don't mutate the input. And read the previous comments.
Python version is working correctly. Your code is causing the issue.