plot.py 文件源码

def run(self):
        """Process command queue and enter turtle main loop"""
        if self.closed:
            raise PlotClosed('Plot window closed')
        opened = False
        try:
            while True:
                try:
                    cmd = self.queue.get(timeout=1)
                    break
                except queue.Empty:
                    pass
            if cmd != self.do_close:
                opened = True
                self.do_zoom()
                self.do_clear()
                cmd()
                turtle.ontimer(self.check_queue, 100)
                turtle.mainloop()
        except turtle.Terminator:
            pass
        except KeyboardInterrupt:
            pass
        finally:
            self.closed = True
            if opened:
                try:
                    turtle.bye()
                except turtle.Terminator:
                    pass