from tkinter.ttk import Combobox
from tkinter import Tk, StringVar
window = Tk()
font = StringVar(value='Courier New')
menu = Combobox(window, values=('Courier New', 'Arial', 'Comic Sans'), textvariable=font, state='readonly')
menu.pack()

I wrote a program where you can select a font with a tkinter.ttk Combobox in Python (see code above). How can you give a font to every option?