python无法安装cv2的解决办法

问题：在windows命令窗口输入pip install cv2后出现：Could not find a version that satisfies the requirement cv2...

解决办法：换成以下命令：

pip3 install opencv-python

答案地址：https://stackoverflow.com/questions/37776228/pycharm-python-opencv-and-cv2-install-error