In use:
pip3 install -user --upgrade --force-reinstall --no-cache-dir jupyter
报错如下：
ERROR: After October 2020 you may experience errors when installing or updating packages. This is because pip will change the way that it resolves dependency conflicts.
Solution
Add –use-feature=2020-resolver after the command
:
pip3 install -user --upgrade --force-reinstall --no-cache-dir jupyter --use-feature=2020-resolver