Jupyter Notebook 5.7.5 版已安装，但出现错误

Question

Installed Jupyter 5.7.5 and when I type jupyter notebook --version 5.7.5 is displayed but later when I type jupyter notebook I get the following error and tried all posssible solutions listed on StackOVerflow website but could not fix it.

Answer 1

我现在看到问题在于您使用的是 Python 3.8，按照之前的线程尝试以下操作：

1. 找到并打开 asyncio.py 文件。就我而言，它位于 C:\Users[USERNAME]\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\tornado\platform\asyncio.py
2. 在import asyncio 行之后添加以下内容：

import sys

if platform == "win32":               
    asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())