Jupyterが動かないときのトラブルシューティング

juptyer notebookを立ち上げても正常に起動しない。
↓なエラーが出る

(pytlesson) C:\anaconda3\envs\pytlesson>jupyter notebook

[I 06:01:49.507 NotebookApp] Serving notebooks from local directory: C:\anaconda3\envs\pytlesson

[I 06:01:49.507 NotebookApp] The Jupyter Notebook is running at:

[I 06:01:49.507 NotebookApp] http://localhost:8888/?token=4efb98535e84bd982fbbdc349c91f78ba9bea7f4cd53f7

[I 06:01:49.507 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).

[C 06:01:49.538 NotebookApp]
    Copy/paste this URL into your browser when you connect for the first time,

    to login with a token:

        http://localhost:8888/?token=4efb98535e84bd982fbbdc50349c91f78ba9bea7f53f7

[I 06:01:50.057 NotebookApp] Accepting one-time-token-authenticated connection from ::1

[I 06:02:04.136 NotebookApp] Creating new notebook in

Traceback (most recent call last):

  File "C:\anaconda3\envs\pytlesson\lib\runpy.py", line 193, in _run_module_as_main

    "__main__", mod_spec)

  File "C:\anaconda3\envs\pytlesson\lib\runpy.py", line 85, in _run_code

    exec(code, run_globals)

  File "C:\anaconda3\envs\pytlesson\lib\site-packages\ipykernel_launcher.py", line 15, in 

    from ipykernel import kernelapp as app

  File "C:\anaconda3\envs\pytlesson\lib\site-packages\ipykernel\__init__.py", line 2, in 

    from .connect import *

  File "C:\anaconda3\envs\pytlesson\lib\site-packages\ipykernel\connect.py", line 13, in 

[I 06:02:22.438 NotebookApp] Kernel started: 8f73d355-143c-4bb6-b0e5-79befa2810fe

    from IPython.core.profiledir import ProfileDir

  File "C:\anaconda3\envs\pytlesson\lib\site-packages\IPython\__init__.py", line 55, in 

    from .terminal.embed import embed

  File "C:\anaconda3\envs\pytlesson\lib\site-packages\IPython\terminal\embed.py", line 16, in 

    from IPython.terminal.interactiveshell import TerminalInteractiveShell

  File "C:\anaconda3\envs\pytlesson\lib\site-packages\IPython\terminal\interactiveshell.py", line 22, in 

    from prompt_toolkit.shortcuts import create_prompt_application, create_eventloop, create_prompt_layout, create_output

ImportError: cannot import name 'create_prompt_application'

https://github.com/jupyter/jupyter_console/issues/158

↑というわけで

pip install prompt-toolkit==1.0.15 -U

前の記事からするとギャグだなこれ・・・