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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.
Interesting that it get 7 best practice and 7 clever rate!
does not work:
for None: TypeError: unsupported operand type(s) for +: 'NoneType' and 'int'
for str: TypeError: unsupported operand type(s) for +: 'str' and 'int'
doesn't work
Can someone please explain to me how this works for cases of None?