opencv-python
https://pypi.tuna.tsinghua.edu.cn/simple/opencv-python/
我这里是python2.7版本的，想要下载opencv3.1，可以先下载下来安装，也可以命令行里带清华源代码
1】pip install opencv_python-3.1.0.5-cp27-cp27m-manylinux1_x86_64.whl
2】pip install -i https://pypi.tuna.tsinghua.edu.cn/simple opencv-python==3.1.0.5
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple opencv-contrib-python==3.1.0.5
3】pip install opencv-python==3.4.2.16 -i https://pypi.tuna.tsinghua.edu.cn/simple
pip install opencv-contrib-python==3.4.2.16 -i https://pypi.tuna.tsinghua.edu.cn/simple
4】pip install -i https://pypi.tuna.tsinghua.edu.cn/simple opencv-python
or
pip install opencv-python -i https://pypi.tuna.tsinghua.edu.cn/simple