现象
导入cv2时，报如下的错误
ERROR: Could not find a version that satisfies the requirement cv2 (from versions: none)
解决方案
win+R打开命令行，输入 pip install opencv-python ，下载opencv，等待下载完成即可。下载有点慢，耐心等待一下。
标签：requirement,versions,Could,cv2,version,satisfies,find From： https://www.cnblogs.com/ping2yingshi/p/17376061.html