IDLE uses the pre-ttk widget set and is indeed ugly. See https://tkdocs.com/tutorial/idle.html https://tkdocs.com/tutorial/idle.html for a case-study involving

IDLE uses the pre-ttk widget set and is indeed ugly. See https://tkdocs.com/tutorial/idle.html https://tkdocs.com/tutorial/idle.html for a case-study involving IDLE (Search for "Another Example" to see the settings window). You should be able to tell from the windows and mac screenshots how old this article is.