python - Turtle 在 jupyter notebook 中不会运行多次

Question

我正在尝试在 jupyter notebook 中运行一些 turtle 代码。当我运行一次代码时，代码运行良好。但是，如果我再次运行代码，Python Turtle Graphics 会卡住并关闭(又名 python turtle graphics 没有响应)并且 jupyter notebook 的内核崩溃

我试过换笔记本，重装jupyter，重启内核，都没用。

这是 turtle 代码:

import turtle
pen = turtle.Pen()
window = turtle.Screen()
pen.color("light blue")
pen.shape("turtle")
pen.forward(100)

window.exitonclick()

这是我第二次运行代码时的错误信息。笔记本保存在C:\Users\fligh\OneDrive\Jupyter Notebooks\，文件名为“Principles 2 Playground”:

<ipython-input-2-79042881c88e> in <module>
      1 import turtle
----> 2 pen = turtle.Pen()
      3 window = turtle.Screen()
      4 pen.color("light blue")
      5 pen.shape("turtle")

c:\users\fligh\appdata\local\programs\python\python37-32\lib\turtle.py in __init__(self, shape, undobuffersize, visible)
   3814                            shape=shape,
   3815                            undobuffersize=undobuffersize,
-> 3816                            visible=visible)
   3817 
   3818 Pen = Turtle

c:\users\fligh\appdata\local\programs\python\python37-32\lib\turtle.py in __init__(self, canvas, shape, undobuffersize, visible)
   2555         self._undobuffersize = undobuffersize
   2556         self.undobuffer = Tbuffer(undobuffersize)
-> 2557         self._update()
   2558 
   2559     def reset(self):

c:\users\fligh\appdata\local\programs\python\python37-32\lib\turtle.py in _update(self)
   2658             return
   2659         elif screen._tracing == 1:
-> 2660             self._update_data()
   2661             self._drawturtle()
   2662             screen._update()                  # TurtleScreenBase

c:\users\fligh\appdata\local\programs\python\python37-32\lib\turtle.py in _update_data(self)
   2644 
   2645     def _update_data(self):
-> 2646         self.screen._incrementudc()
   2647         if self.screen._updatecounter != 0:
   2648             return

c:\users\fligh\appdata\local\programs\python\python37-32\lib\turtle.py in _incrementudc(self)
   1290         if not TurtleScreen._RUNNING:
   1291             TurtleScreen._RUNNING = True
-> 1292             raise Terminator
   1293         if self._tracing > 0:
   1294             self._updatecounter += 1

Terminator:

有人可以帮助我吗？谢谢

Answer 1

如果你想在 Jupyter 中多次运行 turtle 模块，请在最后尝试 turtle.bye() :

import turtle

bob = turtle.Turtle()
bob.forward(50)
turtle.done()

try:
    turtle.bye()
except:
    print("bye") 

(我添加了 try/except 因为 .bye() 引发了一个终止错误)

基于 turtle.done() not working in Spyder