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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 should be working now.
I modified the description too.
Exemples tests cases were wrong. it should be working now.
Test cases do not work in Python:
Traceback: in AttributeError: 'module' object has no attribute 'assertEquals'
Description could more explicitly highlight the need for error handling for non-integers