Capturing mouse inputs with Tkinter

- [Instructor] I have the instrument.py script…open in my code editor, and the first thing to notice…is that the program is structured…as a class called instrument,…which is a common structure for programs…that use Tkinter to generate a GUI.…Using Tkinter made this challenge of capturing…the user's mouse inputs easy,…because it can register event handlers…for mouse and keyboard events.…After all, Tkinter exists to create user interfaces.…

In my instrument classes init method, on lines 16 to 18,…I use the bind method on my Tkinter master window…to register three types of mouse events.…Moving the mouse, pressing the mouse button,…and releasing the mouse button.…When any of those events occur,…the program will execute the corresponding helper method…move_mouse, mouse_down, or mouse_up.…I also registered pressing the Escape key…to Tkinter's destroy method,…which will close the main window and exit this program.…

When each of these events occur…and call their respective methods,…they'll pass an event object as an argument to the method,…