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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.
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because the function will always check from very end of the sentence, right?
I like lambdas, they make code shorter and look nice. But isn't it against PEP to use lambda function where list comprehension can be used?