python 安装几个常见库

1.opencv

pip install opencv-python

pip install opencv-contrib-python

2.pyqt

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

清华：https://pypi.tuna.tsinghua.edu.cn/simple
中科大：https://pypi.mirrors.ustc.edu.cn/simple
豆瓣：https://pypi.douban.com/simple

以清华源为例，在命令行输入即可：
pip -i https://pypi.tuna.tsinghua.edu.cn/simple 库名

(Caused by SSLError("Can
't connect to HTTPS URL because the SSL module is not available.")) - skipping

解决"Can't connect to HTTPS URL because the SSL module is not available.问题

解决"Can't connect to HTTPS URL because the SSL module is not available.问题_沙度灬的博客-CSDN博客

解决pip