使用pip时提示有更新,采用pip install --upgrade pip后出现报错:
ERROR: Could not install packages due to an OSError: [WinError 5] 拒绝访问。: 'd:\python\scripts\pip.exe'
Consider using the --user option or check the permissions.

再继续使用时,出现No module named 'pip'
ModuleNotFoundError: No module named 'pip'

解决方法:
python -m ensurepip
python -m pip install --upgrade pip