ERROR: Could not find a version that satisfies the requirement cv2 (from versions: none)

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• 现象
• 解决方案

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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)

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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。