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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.
I get the same error, however on a jupyter notebook i pass that case. Not sure why and how to print the input
edit: nevermind, just realized my mistake