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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.
Sorry they have no problem. Look at the top of the page: 1261 people passed the Python kata. If there were problems somebody would have seen them before you:-).