Foreground and background are sufficient for simple widgets such as buttons, but more complex Tkinter widgets like the Text widget or the Ttk Treeview rely on a system of tags. A tag in Tkinter is a named region of a widget's content to which color and font settings can be applied. To see how this works, let's build a crude, but pretty, Python shell.
We'll start by creating a Text widget:
import tkinter as tk text = tk.Text(width=50, height=20, bg='black', fg='lightgreen') text.pack()
Here, we've used the fg and bg arguments to set up a green-on-black theme, popular with programmers. Rather than have only green text, though, let's configure different colors for our prompt and our interpreter output.
To do this, we'll define some ...
