【Python】Could not find a version that satisfies the requirement cv2 (from versions: ) 的解决方案

pip下载cv2出现下面的错误：

Could not find a version that satisfies the requirement cv2 (from versions: )

No matching distribution found for cv2

我的Python版本是3.7+

解决方案：

修改pip语句为：pip install opencv-python，下载完毕后再import cv2就可以正常使用了。