Loading collection data...
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.
I've just made the changes, Python 3.10 is now available (it's possible you need to select it manually).
If you are refering to Python (it's important to say which language you are using since there are more than 50 available here), the current version of the kata uses 3.8 (you can see it at the top in the trainer window), the statement you are mentioning is only available in Python 3.10. You need to use something else, or wait for the kata to be updated.