If you are interested in digging deeper into the world of GUIs, then I'd like to offer you the following suggestions.
tkinter and its themed widget set,
tkinter.ttk, will take you some time. There's much to learn and play with. Another interesting module to explore, when you'll be familiar with this technology, is
tkinter.tix (Tk Interface Extension) module provides an additional very rich set of widgets. The need for them stems from the fact that the widgets in the standard
Tk library are far from complete.
tkinter.tix library allows us to solve this problem by providing widgets like HList, ComboBox, Control (or SpinBox), and various scrollable widgets. Altogether, there ...