Python 的 Turtle 图形在第二次运行时总是崩溃

Question

每次我在Python上第二次运行Turtle Graphics相关代码时，它总是崩溃或者程序没有响应，只是显示一个白屏，上面什么也没有。

当我重新启动程序时，代码正常工作并且没有错误。

我尝试运行这个：

import turtle

t = turtle.Turtle()

t.forward(100)

turtle.mainloop()
turtle.bye

非常简单的代码，没有理由出错，但除了第一次尝试之外，它无法运行多次。

我无法运行的所有代码在其他电脑上都运行得很好。所以这不是一个与写错代码相关的问题。

我在使用其他不使用 Turtle Graphics 的代码时从未遇到过此问题。只有当我多次运行代码时才会发生这种情况。

这是我收到的错误消息：

An error ocurred while starting the kernel
Fatal Python error: PyEval_RestoreThread: the function must be called with the GIL held, but the GIL is released (the current Python thread state is NULL)
Python runtime state: initialized

Thread 0x00004dd0 (most recent call first):
File "C:\Users\lg\anaconda3\lib\site‑packages\ipykernel\parentpoller.py", line 89 in run
File "C:\Users\lg\anaconda3\lib\threading.py", line 973 in _bootstrap_inner
File "C:\Users\lg\anaconda3\lib\threading.py", line 930 in _bootstrap

Thread 0x00003aac (most recent call first):
File "C:\Users\lg\anaconda3\lib\site‑packages\zmq\sugar\socket.py", line 619 in recv_multipart
File "C:\Users\lg\anaconda3\lib\site‑packages\jupyter_client\session.py", line 809 in recv
File "C:\Users\lg\anaconda3\lib\site‑packages\spyder_kernels\comms\frontendcomm.py", line 135 in poll_one
File "C:\Users\lg\anaconda3\lib\site‑packages\spyder_kernels\comms\frontendcomm.py", line 125 in poll_thread
File "C:\Users\lg\anaconda3\lib\threading.py", line 910 in run
File "C:\Users\lg\anaconda3\lib\threading.py", line 973 in _bootstrap_inner
File "C:\Users\lg\anaconda3\lib\threading.py", line 930 in _bootstrap

Thread 0x000026c8 (most recent call first):
File "C:\Users\lg\anaconda3\lib\threading.py", line 312 in wait
File "C:\Users\lg\anaconda3\lib\threading.py", line 574 in wait
File "C:\Users\lg\anaconda3\lib\site‑packages\IPython\core\history.py", line 829 in run
File "C:\Users\lg\anaconda3\lib\site‑packages\IPython\core\history.py", line 58 in needs_sqlite
File "C:\Users\lg\anaconda3\lib\site‑packages\decorator.py", line 232 in fun
File "C:\Users\lg\anaconda3\lib\threading.py", line 973 in _bootstrap_inner
File "C:\Users\lg\anaconda3\lib\threading.py", line 930 in _bootstrap

Thread 0x00000f9c (most recent call first):
File "C:\Users\lg\anaconda3\lib\selectors.py", line 315 in _select
File "C:\Users\lg\anaconda3\lib\selectors.py", line 324 in select
File "C:\Users\lg\anaconda3\lib\asyncio\base_events.py", line 1854 in _run_once
File "C:\Users\lg\anaconda3\lib\asyncio\base_events.py", line 596 in run_forever
File "C:\Users\lg\anaconda3\lib\site‑packages\tornado\platform\asyncio.py", line 199 in start
File "C:\Users\lg\anaconda3\lib\site‑packages\ipykernel\control.py", line 21 in run
File "C:\Users\lg\anaconda3\lib\threading.py", line 973 in _bootstrap_inner
File "C:\Users\lg\anaconda3\lib\threading.py", line 930 in _bootstrap

Thread 0x00004b08 (most recent call first):
File "C:\Users\lg\anaconda3\lib\site‑packages\ipykernel\heartbeat.py", line 102 in run
File "C:\Users\lg\anaconda3\lib\threading.py", line 973 in _bootstrap_inner
File "C:\Users\lg\anaconda3\lib\threading.py", line 930 in _bootstrap

Thread 0x00003548 (most recent call first):
File "C:\Users\lg\anaconda3\lib\selectors.py", line 315 in _select
File "C:\Users\lg\anaconda3\lib\selectors.py", line 324 in select
File "C:\Users\lg\anaconda3\lib\asyncio\base_events.py", line 1854 in _run_once
File "C:\Users\lg\anaconda3\lib\asyncio\base_events.py", line 596 in run_forever
File "C:\Users\lg\anaconda3\lib\site‑packages\tornado\platform\asyncio.py", line 199 in start
File "C:\Users\lg\anaconda3\lib\site‑packages\ipykernel\iostream.py", line 81 in _thread_main
File "C:\Users\lg\anaconda3\lib\threading.py", line 910 in run
File "C:\Users\lg\anaconda3\lib\threading.py", line 973 in _bootstrap_inner
File "C:\Users\lg\anaconda3\lib\threading.py", line 930 in _bootstrap

Current thread 0x00004430 (most recent call first):
File "C:\Users\lg\anaconda3\lib\site‑packages\ipykernel\eventloops.py", line 105 in _loop_qt
File "C:\Users\lg\anaconda3\lib\site‑packages\ipykernel\eventloops.py", line 119 in loop_qt4
File "C:\Users\lg\anaconda3\lib\site‑packages\ipykernel\eventloops.py", line 126 in loop_qt5
File "C:\Users\lg\anaconda3\lib\site‑packages\ipykernel\kernelbase.py", line 402 in advance_eventloop
File "C:\Users\lg\anaconda3\lib\site‑packages\tornado\ioloop.py", line 741 in _run_callback
File "C:\Users\lg\anaconda3\lib\asyncio\events.py", line 80 in _run
File "C:\Users\lg\anaconda3\lib\asyncio\base_events.py", line 1890 in _run_once
File "C:\Users\lg\anaconda3\lib\asyncio\base_events.py", line 596 in run_forever
File "C:\Users\lg\anaconda3\lib\site‑packages\tornado\platform\asyncio.py", line 199 in start
File "C:\Users\lg\anaconda3\lib\site‑packages\ipykernel\kernelapp.py", line 677 in start
File "C:\Users\lg\anaconda3\lib\site‑packages\spyder_kernels\console\start.py", line 328 in main
File "C:\Users\lg\anaconda3\lib\site‑packages\spyder_kernels\console\__main__.py", line 23 in 
File "C:\Users\lg\anaconda3\lib\runpy.py", line 87 in _run_code
File "C:\Users\lg\anaconda3\lib\runpy.py", line 197 in _run_module_as_main