it should be text.lower() not text.lower

Check the docs about how to post your code here, so we can see what you did instead of guessing it.

did you reassign the variable text to something you shouldn't have? (e.g. text = str or something along those lines)

You're trying to iterate over an empty string.

Python Completions 49816

Please read this: https://docs.codewars.com/training/troubleshooting

Click Reset and try again, you probably messed up the sample tests.

PEP8 on Python indentation