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.
for sure, my mistake
Your own tests prove that you're wrong...
This makes no sense without further explanation. Where's the purity and what's impractical about this solution? What does this have to do with the solution? Please, use real arguments and not "argumentum ad The Zen of Python".
Because I could and because it has O(1) time complexity.
Where have I written that? Can't find it :D
A simple typo is not an issue, merely a suggestion.