Hi! It's very hard to work out what the problem might be here if you don't show us the code that caused the error. Also, this site is for reporting bugs in the Python programming language itself, and this doesn't look like a bug in Python to me. You might be better off posting this question on Discuss (https://discuss.python.org/c/users/7), reddit, or StackOverflow.

Having said all that, it looks like you're passing in a list where a string is expected — `list` objects don't have a `find` method (https://docs.python.org/3/tutorial/datastructures.html), but `str` objects do (https://docs.python.org/3/library/stdtypes.html#str.find).

Good luck solving your problem :)