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解决pip install x ERROR: Could not install packages due to an OSError…问题
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解决pip install x ERROR: Could not install packages due to an OSError…问题
在进行人脸数据训练时，执行Python文件，出现下面错误：
Traceback (most recent call last):
File "D:/microPythonCode/camera/trainer.py", line 47, in <module>
recognizer=cv2.face.LBPHFaceRecognizer_create()
AttributeError: module 'cv2.cv2' has no attribute 'face'出现AttributeError: module “cv2” has no attribute “face”，就需要安装opencv-contrib-python库。
一般的安装方法如下:
pip install opencv-contrib-python
或者
pip install opencv-contrib-python -i http://pypi.douban.com/simple --trusted-host pypi.douban.com但是，下载150M左右的文件后，安装时出现的显眼的红色报错：
ERROR: Could not install packages due to an OSError: [Errno 2] No such file......这个错误通常表示在尝试安装或升级包时，找不到特定的文件或目录。这可能是由于多种原因引起的，包括文件损坏、依赖关系问题或环境配置问题。
如果你遇到同样的问题，可以尝试我解决这个问题的方法：
（1）opencv-contrib和opencv必须具有完全相同的版本。
>pip list
...
numpy 1.19.5
opencv-python 4.5.1.48
packaging 21.3
pandas 1.1.5
...
>pip install opencv-contrib-python==4.5.1.48
...
Installing collected packages: opencv-contrib-python
Successfully installed opencv-contrib-python-4.5.1.48
...（2）如果仍然出现错误，请更改了它们的版本。
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