win10 python3.7安装 opencv 和 face_recognition

一.python3安装opencv

 pip3 install opencv-python==3.4.6.27

二.python3安装face_recognition

 pip3 install cmake  

如果安装失败提示"Could not find a version that satisfies the requirement openpyxl (from versions: "

是pip版本过低，需要更新pip，然后在安装cmake：

 1 python -m pip install --upgrade pip

2 或者

3 python -m pip3 install --upgrade pip3

pip3 install  face_recognition