python-pip升级报错- AttributeError: 'NoneType' object has no attribute 'bytes

正常的pip升级命令:python -m pip install --upgrade pip

升级报错提示:AttributeError: 'NoneType' object has no attribute 'bytes'

更换升级命令:easy_install -U pip

靡不有初,鲜克有终
原文地址:https://www.cnblogs.com/gtsnow/p/11097944.html