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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.
This is not necessary here cause integers are inmutable on Python, you can't change integers but only change references to new ones wich only would take effect on the list you are doing so, that is only necessary when you are working with mutable objects.
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