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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.
Rust translation
I've solved the kata in Python and the error didn't appear. Not a kata issue.
I don't see that error with the initial code, are you sure your code doesn't has an unmatched parentheses?
python generates an error on the testing code:
File "/workspace/default/tests.py", line 9
return ''.join(translation.get(char, char) for char in message)") , "GBCE", "Expected "GBCE")
^
SyntaxError: unmatched ')'