Color changing window demo of tkinter after timer events

A question on the topic of background colors, is there a way to make an entire Frame's background white, including unassigned space? And, without getting those nasty grey areas around labels and windows?

re: pyguy62: Only by putting bg='white' everywhere, tk, I do not know ttk themes:

try:
    from Tkinter import *
except:
    from tkinter import *

if __name__ == '__main__':
    win = Tk() 
    win.geometry("500x300")
    win.title('Demonstrating bg')
    win.config(bg='white')
    color_frame = Frame(bg='white')
    Label(win, bg='white', text='test').pack()
    color_frame.pack(expand=YES, fill=BOTH)
    
    win.mainloop()

To be able to run PyTony's script with nowadays python versions, color_label needs to be defined as global f.e.:

#!/usr/bin/python
# -*- coding: utf-8 -*-
# originally posted in thread http://www.daniweb.com/software-development/python/threads/298190/1282328#post1282328
# color_label needs to be defined global with todays python versions
"""
Created on Mon Jul 17 11:10:18 2017

@author: josef
"""

from __future__ import absolute_import, division, unicode_literals, print_function
from sys import version_info
if version_info.major >= 3:
    from tkinter import *   # python 3.2
elif version_info.major == 2:
    from Tkinter import *   # python 2.7
else:
    print ("what the hell you are running, if not Python 2 or 3 ?  :D")

def change(a=0):
    color_label.config(bg = "blue" if a & 1 else "purple")
    color_label.after(400,change, a ^ 1 )
    print ("i am in change",a)

def main():
    global color_label
    win = Tk() 
    win.geometry("500x300")
    win.title('Demonstrating after event')
    color_label = Label(win)
    color_label.pack(expand=YES, fill=BOTH)
    change()

    win.mainloop()

if __name__ == '__main__':
    main()

@jklotzner Thank you for the input, but this has nothing to do with today's python vs yesterday's python. The difference is that your code is written in the local namespace of a main() function while pyTony's code is written in the global namespace. A python program does not need a main() function, although it is often used.

Apart from that do you know that before python 2, there was a python 1? It is still available at python.org. Python 1.5.2 was a very very successful realease :-)