Quick mock-up of a window spotted on Twitter. It's a fun challenge to see how difficult it is to duplicate tkinter based programs. I don't know the number of lines of code for this source window: ![Spectrophotometry.jpg](/api/files/5e9d52034732c8c719b3a8df/spectrophotometry.jpeg "Spectrophotometry.jpg") The PySimpleGUI version required 11 lines of code to duplicate it. ![SNAG-0761.jpg](/api/files/5e9d52184732c8c719b3a956/snag-0761.jpeg "SNAG-0761.jpg") Here is the source code for the above window: