Successfully solved the problem "You are using pip version 10.0.1, however version 20.0.2 is available." under WINDOW10.
…
The original version of pip on this machine is 10.0.1. When using python -m pip install --upgrade pipand , python -m pip install --upgrade pip --force-reinstallit will prompt the above installation failure.
After borrowing solutions from many people, I finally found a solution that suited my situation: typing in the command prompt:python -m pip install -U pip