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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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As I know, there are two types of coroutines on Python:
You said about second one.
But, for example, there is PEP-342 about first one:
https://peps.python.org/pep-0342/
Sure, you can use it with OOP. But the main idea is solving it with coroutine. (I guess, I will limit it).