Perhaps this could help: Troubleshooting-your-solution.

My code clears all the tests succesfully, except for the last one,
which gives me the following error message:

'Finished!' should equal 'Try again!'

Yes, without that variable, they could have done that in one line.

@Chrono79 Now it works, thanks!

@akar-0 Sorry about the spoiler, I'm new and still getting used to this site.

Use the initial function definition:

def number(bus_stops):

or prepend this to your code:

from __future__ import annotations 

Read this too: https://docs.codewars.com/training/troubleshooting/

Please use spoiler flag next time.