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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.
Definitely shorter, but not more readable IMHO.
If you want something that sort, but a bit more readable (and pythonic) you could use:
return ans if ans and len(ans) < 140 else False
Anyways, ans is never going to be empty because you already inserted '#'