Last time, I assembled a Python object ... the simplest example. Make a button and close the program when you push it. The mainloop call handles the event loop common in GUI programs.

Among user interface ... The standard Python interpreter uses the GNU Readline library and makes it easy to recall what you've previously typed. The up and down arrow keys allow you to move ...

Putting a GUI ... due to Python’s ability to run code without a slow compiling step. There are other approaches to this problem, too – with MyOpenLab being a particularly versatile example.