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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.
It is impressive that you didn't even use the re module.
nice one, one small comment you don't need to use ^ and $ because they are using re.fullmatch in the text anyway.