Thanks, I had to check the Python docs to be sure I wasn't crazy! I went A->D, stopped at B because it 'worked', and got it wrong. D also works, obviously, but

Thanks, I had to check the Python docs to be sure I wasn't crazy! I went A->D, stopped at B because it 'worked', and got it wrong. D also works, obviously, but I'm glad the question is cleaned up now.