from Tkinter import *
import time

class Clock:

    def __init__(self, master, stars=0):
	self.master = master
	self.stars = stars
	self.label = Label(master, borderwidth=1, relief='raised')
	self.label.pack()
	self.update()

    def update(self):
	try:
	    t = time.time()
	    s = time.ctime(t)
	    if self.stars: s = s + '*'*int((t%10))
	    self.label['text'] = s
	    self.master.after(int(1000*(1-t%1)), self.update)
	except:
	    # We may get here if the widget has been deleted --
	    # if we don't catch the exception, Grail dies.
	    pass