Python-сообщество

 from time import strftime, localtime
from tkinter import *
w=strftime("%H:%M:%S", localtime())
root = Tk()
lab = Label()
lab.pack()
while True:
 lab['text'] = w
root.mainloop()

 from time import strftime, localtime
from Tkinter import *
root = Tk()
lab = Label()
lab.pack()
while True:
    w = strftime("%H:%M:%S", localtime())
    lab['text'] = w
    root.update_idletasks()
    root.update()