Why use PySimpleGUI: Python ships with the Tkinter library for creating GUIs, but Tkinter is not known for being easy to work with. PySimpleGUI wraps Tkinter with APIs that are far less exasperating.

Last time, I assembled a Python object representing a Rigol oscilloscope ... directions and a center button you can push. The tkinter library has nothing like that, but that’s not a problem.