python - 无法连接到 Jupyter Notebook - tornado.websocket.WebSocketClosedError

Question

我已经安装了 Anaconda，当我运行 Jupyter Notebook 并尝试创建一个新笔记本时，它无法连接。它只是尝试连接一段时间，我收到下面的 Traceback 错误。

我已经浏览了关于此错误的所有帖子两天了，但没有任何成功。我曾尝试将 tornado 降级到 5.1.1、升级笔记本、在虚拟环境中运行它等。

任何帮助将不胜感激。

[I 20:20:54.106 NotebookApp] Restoring connection for a92303c8-0087-407e-ae8b-e234f4cf7157:f641986b51bf43359e17929728ccbb13
[I 20:20:54.120 NotebookApp] Starting buffering for a92303c8-0087-407e-ae8b-e234f4cf7157:f641986b51bf43359e17929728ccbb13
[I 20:20:55.145 NotebookApp] Restoring connection for a92303c8-0087-407e-ae8b-e234f4cf7157:f641986b51bf43359e17929728ccbb13
[I 20:20:55.156 NotebookApp] Starting buffering for a92303c8-0087-407e-ae8b-e234f4cf7157:f641986b51bf43359e17929728ccbb13
Future exception was never retrieved
future: <Future finished exception=WebSocketClosedError()>
Traceback (most recent call last):
  File "C:\Anaconda\Anaconda3\lib\site-packages\tornado\websocket.py", line 874, in wrapper
    yield fut
  File "C:\Anaconda\Anaconda3\lib\site-packages\tornado\gen.py", line 1133, in run
    value = future.result()
tornado.iostream.StreamClosedError: Stream is closed

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Anaconda\Anaconda3\lib\site-packages\tornado\gen.py", line 1141, in run
    yielded = self.gen.throw(*exc_info)
  File "C:\Anaconda\Anaconda3\lib\site-packages\tornado\websocket.py", line 876, in wrapper
    raise WebSocketClosedError()
tornado.websocket.WebSocketClosedError

Answer 1

安装 tensorfowjs 时会出现此问题，在安装 tensorflowjs 时，它会将 prompt-toolkit 降级到 1.0.14 版。要解决此问题，您只需在命令提示符中运行以下代码，将 promp-toolkit 升级到 3.0.5 版:

 pip install prompt-toolkit==3.0.5