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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.
Added to all languages
To properly report an issue, mention the language and which error do you get. Read this: https://docs.codewars.com/training/troubleshooting
There is no problem with Python: