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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.
The log is clear:
ValueError: invalid literal for int() with base 10:...
, on line 11, you try to convert to integer (default base is 10) something that cannot be, since it contains all kind of characters. Just google the error and you'll find plenty of explanations: https://www.google.com/search?client=firefox-b-e&q=ValueError%3A+invalid+literal+for+int%28%29+with+base+10%3A