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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.
Python usually throws this error when it reaches the end of the code but thinks that it should still be executing a loop or function. I would start by checking the code for any stray whitespace or indentation differences that don't need to be there, or if there are any missing closing brackets, colons, etc that may have disappeared when you pasted your code.