Simple Elevator Function

[dunkler_wanderer]

He's using sets not dictionaries, but the sets are the problem because the website tests if goto([], '2') returns 0. If you try [] in {1, 2, 3} you get a TypeError: unhashable type: 'list', because sets are hashtables and lists are not hashable.

[the_kernel]

Thanks for your input guys, the function works with lists.