def Start(self):                                                     
        """ Start the stopwatch, ignore if running. """
        if not self._running:            
            self._start = time.time() - self._elapsedtime
            self._update()
            self._running = 1
 Start the stopwatch, ignore if running. 
recipes/Python/578666_Stopwatch_with_laps_in_Tkinter/recipe-578666.py