python 安装 cv2 时报错 ERROR: Could not find a version that satisfies the requirement cv2

python安装cv2 时报错：ERROR: Could not find a version that satisfies the requirement cv2 (from versions: none) ERROR: No matching distribution found for cv2

解决方法：

cv2库是OpenCV的Python绑定库，它通常通过以下方式安装：

pip install opencv-python