[Python] ModuleNotFoundError: No module named 'mimetypes'

The following error pops out whenever I enter commands like conda info -e conda update condo or conda create env -n 123 in the terminal.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
...
from ..gateways.connection.download import download
File "/Users/liguolun/opt/anaconda3/lib/python3.8/site-packages/conda/gateways/connection/__init__.py", line 39, in <module>
from pip._vendor.requests import ConnectionError, HTTPError, Session
File "/Users/liguolun/opt/anaconda3/lib/python3.8/site-packages/pip/_vendor/requests/__init__.py", line 43, in <module>
from pip._vendor import urllib3
File "/Users/liguolun/opt/anaconda3/lib/python3.8/site-packages/pip/_vendor/urllib3/__init__.py", line 7, in <module>
from .connectionpool import HTTPConnectionPool, HTTPSConnectionPool, connection_from_url
File "/Users/liguolun/opt/anaconda3/lib/python3.8/site-packages/pip/_vendor/urllib3/connectionpool.py", line 38, in <module>
from .request import RequestMethods
File "/Users/liguolun/opt/anaconda3/lib/python3.8/site-packages/pip/_vendor/urllib3/request.py", line 3, in <module>
from .filepost import encode_multipart_formdata
File "/Users/liguolun/opt/anaconda3/lib/python3.8/site-packages/pip/_vendor/urllib3/filepost.py", line 10, in <module>
from .fields import RequestField
File "/Users/liguolun/opt/anaconda3/lib/python3.8/site-packages/pip/_vendor/urllib3/fields.py", line 3, in <module>
import mimetypes
ModuleNotFoundError: No module named 'mimetypes'


How can it be fixed?

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