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
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