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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've made a fix for python 3.6. This kata should work now fine!
All gen.next() are replaced by next(gen)
Good luck!
Maybe its your puzzle function causing the trouble?
Fixed.
Wrapping the range with a list seems to work. Maybe that should be done in the tests directly.