Comment by Hasnep

Actually, the code before does nothing if dataset is set to 'animals', 'turtle' or 'formal_turtle', most of the branches are inaccessible. Also, the extra else clause that raises an error and the line

    elif dataset = 'formal_turtle':

are both invalid syntax.

I think 'clean up' here means something closer to 'convert this to what I'm trying to write'.