homebrew 安装 opencv 并支持python

第一步，安装opencv

for mac：

brew install opencv

第二步，和python3关联起来

我们需要找到opencv的cv2*.so文件，并和python3环境关联

opencv的cv2*.so文件位置：

/usr/local/Cellar/opencv/4.2.0_1/lib/python3.7/site-packages/cv2/python-3.7/cv2.cpython-37m-darwin.so

我们进入python3环境：

cd /usr/local/lib/python3.6

创建关联

ln -s /usr/local/Cellar/opencv/4.2.0_1/lib/python3.7/site-packages/cv2/python-3.7/cv2.cpython-37m-darwin.so cv2.so