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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.
wouldn't your "return None" be as unnecessary?
Don't modify the input.
What he means is that the modulo basically asks "is there something left?". If just using "if 4%2:" it will return False automatically, True in case of "5%2".
Modulo if the remainder of character count divided by 2 is not 0 3/2 = 1(!= 0) anyway got to love python dont have to use a million type conversions and have giant ugly code for small problems