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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.
OP solved it, closing!
If you return True with your second condition, your third condition is never considered, so actually this code cannot catch bad characters, it only controls the length. Your function ends as soon as it meets a
returnstatement.OP solved it, closing
It would not work for the kata because your code overwrites the variable number with the result from int(input()).