Python is an object-oriented programming language, yet it does not always make sense to use OOP. For simple scripting tasks, the legacy waterfall coding style is still appropriate.
In this recipe, we will create a new GUI that mixes both the fall-down coding style with the more modern OOP coding style.
We will create an OOP-style class that will display a tooltip when we hover the mouse over a widget in a Python GUI that we will create using the waterfall style.
Note
Fall-down and waterfall coding styles are the same. It means that we have to physically place code above code before we can call it from the code below. In this paradigm, the code literally falls down from the top of our program to the bottom of our program when we execute the code.
In this recipe, we will create a GUI using tkinter, which is similar to the GUI we created in the first chapter of this book.