pip install install plug

pip install pyqt5 -i https://pypi.tuna.tsinghua.edu.cn/simple
pip install openCV-python

http://mirrors.aliyun.com/pypi/simple/ Ali cloud

http://pypi.douban.com/simple/ watercress

https://pypi.mirrors.ustc.edu.cn/simple/ China University of Science and Technology

http://pypi.mirrors.opencas.cn/simple/ Chinese Academy of Sciences

https://pypi.tuna.tsinghua.edu.cn/simple/ Tsinghua University