We looked at several common Tkinter widgets, such as Menu, Buttons, Label, and Text, in Chapter 2, Making a Text Editor. Let's now expand our experience with Tkinter to make some music. Let's build a cross-platform drum machine using Tkinter and some other Python modules.

Some of the key objectives for this chapter are:

• Learning to structure Tkinter programs in the object-oriented style of programming
• Delving deeper into a few more Tkinter widgets, such as Spinbox, Button, Entry, and Checkbutton
• Applying the grid geometry manager in a practical project
• Understanding the importance of choosing the right data structure for our programs
• Learning to bind higher-order callback functions to widgets
• Learning to use Tkinter in conjunction with some standard and third-party modules
• Understanding the need for multithreading and how to write multithreaded applications
• Learning about object serialization or pickling
• Learning about ttk widgets