Loading collection data...
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 assume you are using Python 3 (not yet supported here on CodeWars), as you use the print() (notice the brackets) function.
Also, it seems you forgot to RETURN a value: your function just prints it on screen.
Finally, you are returning a list of tuples, while you should return a list of lists.
I hope this helps (and that CodeWars will notify me if you reply to this: I am getting very few messages notified, sigh...).
I'm getting the same error. :-/
This comment is hidden because it contains spoiler information about the solution