_tkinter.TclError：无效的命令名称“ .4302957584”

_tkinter.TclError：无效的命令名称“ .4302957584”

window.mainloop

如果不按下

stop

按钮，将永远不会执行主应用程序循环。这是您问题的根源。重写动画循环：

def __init__(self):    ...    self.sleepTime = 20    self.isStopped = False    self.window = window    self.window.after(self.sleepTime, self.animate)    window.mainloop()    ...def animate(self):    if not self.isStopped:        self.canvas.update()        self.canvas.delete("ball")        for ball in self.ballList: self.redisplayBall(ball)        self.window.after(self.sleepTime, self.animate)