(base) PS C:\Users\86178> jupyter notebook
Traceback (most recent call last):
File "D:\Anaconda3\Scripts\jupyter-notebook-script.py", line 6, in <module>
from notebook.notebookapp import main
File "D:\Pyhton38\Lib\site-packages\notebook\notebookapp.py", line 7, in <module>
import asyncio
File "D:\Pyhton38\Lib\site-packages\asyncio\__init__.py", line 21, in <module>
from .base_events import *
File "D:\Pyhton38\Lib\site-packages\asyncio\base_events.py", line 296
future = tasks.async(future, loop=self)
^
SyntaxError: invalid syntax

asyncio库出问题，在cmd窗口用pip uninstall asyncio卸载掉asyncio，再用pip install asyncio重新安装asyncio就可以解决问题。