问ModuleNotFoundError:没有名为'six‘的模块- python 3.8.5

EN

(dreams) C:\Users\jacks\Documents\dreams_project>jupyter notebook
Traceback (most recent call last):
  File "C:\Users\jacks\Anaconda3\Scripts\jupyter-notebook-script.py", line 6, in <module>
    from notebook.notebookapp import main
  File "C:\Users\jacks\Anaconda3\lib\site-packages\notebook\notebookapp.py", line 83, in <module>
    from .services.kernels.kernelmanager import MappingKernelManager, AsyncMappingKernelManager
  File "C:\Users\jacks\Anaconda3\lib\site-packages\notebook\services\kernels\kernelmanager.py", line 18, in <module>
    from jupyter_client.session import Session
  File "C:\Users\jacks\Anaconda3\lib\site-packages\jupyter_client\session.py", line 41, in <module>
    from jupyter_client.jsonutil import extract_dates, squash_dates, date_default
  File "C:\Users\jacks\Anaconda3\lib\site-packages\jupyter_client\jsonutil.py", line 10, in <module>
    from dateutil.parser import parse as _dateutil_parse
  File "C:\Users\jacks\Anaconda3\lib\site-packages\dateutil\parser\__init__.py", line 2, in <module>
    from ._parser import parse, parser, parserinfo, ParserError
  File "C:\Users\jacks\Anaconda3\lib\site-packages\dateutil\parser\_parser.py", line 42, in <module>
    import six
ModuleNotFoundError: No module named 'six'