Here is a small Tkinter application that you can use to try out the widget.
The driver starts with a prologue making it self-executing (under Unix), and a comment that points back to this documentation.
#!/usr/bin/env python
#================================================================
# fontselector: Test driver for
#
# For documentation, see:
# http://www.nmt.edu/tcc/help/lang/python/examples/fontselect/
#----------------------------------------------------------------
from Tkinter import *
import tkFont
import fontselect