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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.
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Due to the young Gauß's misbehaviour, Herr J.G. Büttner, the primary school teacher, to keep the bored and unruly young schoolboy...(continues from the source quote).
Why does it give me this error "n must be an integer: 6 should equal None"? 6 is not an integer?!?