Problem follow up - PIP source change

Problem description

pip Official sources are too slow , Need to change the source to save time .

resolvent

The source change command is as follows ：

pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple

Other sources ：

• Alibaba cloud ： http://mirrors.aliyun.com/pypi/simple/
• University of science and technology of China ： https://pypi.mirrors.ustc.edu.cn/simple/
• Tsinghua University ： https://pypi.tuna.tsinghua.edu.cn/simple/