Donghy的博客pip install opencv-python==4.0.0.21 -i https://mirrors.aliyun.com/pypi/simple/ -trusted-host mirrors.aliyun.com
pip install opencv-python==4.0.0.21 -i https://pypi.mirrors.ustc.edu.cn/simple/ -trusted-host pypi.mirrors.ustc.edu.cn
pip install opencv-python==4.0.0.21 -i https://pypi.douban.com/simple/ -trusted-host pypi.douban.com
pip install opencv-python==4.0.0.21 -i https://pypi.tuna.tsinghua.edu.cn/simple -trusted-host pypi.tuna.tsinghua.edu.cn
pip install opencv-python==4.0.0.21 -i https://pypi.hustunique.com/ -trusted-host pypi.hustunique.com