Tkinter ttk Style - CodersLegacy
https://coderslegacy.com/python/tkinter-ttk-styleTkinter keeps both it’s logic code and styling options in the same area, whereas ttk uses the Style class to separate the styling from the widget logic. ttk also expands upon the styling concept in Tkinter, for example, allowing us to create a style once, and then apply it on many widgets without having to re-write any code. Table of Contents:
Tkinter - Python Tutorial
https://www.pythontutorial.net/tkinterTkinter is pronounced as tea-kay-inter. Tkinter is the Python interface to Tk, which is the GUI toolkit for Tcl/Tk. Tcl (pronounced as tickle) is a scripting language often used in testing, prototyping, and GUI development. Tk is an open-source, cross-platform widget toolkit used by many different programming languages to build GUI programs.