My script runs fine in python 3.4. Thought I'd try it on the latest rpi os and get the error "can't import ImageTk from PIL".
And -- should I even be attempting to run a script I wrote with 3.4 in 3.7.1 ? Are they backwards compatible or am I asking for trouble? Changed the shebag line to 3.7 -- first attempt and I got the ImageTk error.