ImportError: cannot import name 'PackageFinder' from 'pip._internal.index'

报错如下：

ImportError: cannot import name 'PackageFinder' from 'pip._internal.index' (c:pythonpython37libsite-packagespip\_internalindex\__init__.py)

解决方式

1. curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
2. python get-pip.py