Python 运行Opencv时出现的问题：“；属性错误：模块'；cv2.dnn'；没有属性'；readNet'&引用；

首次使用opencv通过引用来自

（附言——我对深度学习还不熟悉）

问题：

当我在代码行下面运行时：

net = cv2.dnn.readNet("yolov3.weights", "yolov3.cfg")

我得到以下提到的错误：

----> 5 net = cv2.dnn.readNet("yolov3.weights", "yolov3.cfg")

AttributeError: module 'cv2.dnn' has no attribute 'readNet'

要解决此问题：

1） 在谷歌上搜索了一段时间后，我尝试使用

conda update opencv python

更新我的opencv，还尝试使用

conda install-c conda forge opencv

再次安装，但即使几次尝试后，它仍然保持在3.3.1版本

2） 然后我了解到我需要卸载所有以前版本的opencv，但我找不到任何可供opencv手动删除的文件夹，

conda uninstall opencv

从几小时后开始运行，状态为

查找python xxxxxx的最短冲突路径

，并且仍在运行

3） 我正在考虑手动删除所有opencv文件，并能够找到opencv文件，但我不确定是否应该删除所有这些文件以重新安装opencv

4） 我需要的建议，如果它是安全的删除以下提到的文件或不，如果我删除它们，并重新安装opencv，那么它应该工作或不工作。请帮忙

opencv文件：

 'C:\\Anaconda\\Library\\bin\\opencv_annotation.exe',
 'C:\\Anaconda\\Library\\bin\\opencv_annotation.exe.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_annotation.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_aruco331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_aruco331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_aruco331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_bgsegm331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_bgsegm331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_bgsegm331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_calib3d331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_calib3d331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_calib3d331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_ccalib331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_ccalib331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_ccalib331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_core331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_core331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_core331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_createsamples.exe',
 'C:\\Anaconda\\Library\\bin\\opencv_createsamples.exe.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_createsamples.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_datasets331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_datasets331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_datasets331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_dnn331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_dnn331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_dnn331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_dpm331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_dpm331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_dpm331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_face331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_face331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_face331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_features2d331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_features2d331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_features2d331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_ffmpeg331_64.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_flann331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_flann331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_flann331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_fuzzy331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_fuzzy331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_fuzzy331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_highgui331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_highgui331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_highgui331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_imgcodecs331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_imgcodecs331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_imgcodecs331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_imgproc331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_imgproc331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_imgproc331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_img_hash331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_img_hash331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_img_hash331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_interactive-calibration.exe',
 'C:\\Anaconda\\Library\\bin\\opencv_interactive-calibration.exe.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_interactive-calibration.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_line_descriptor331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_line_descriptor331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_line_descriptor331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_ml331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_ml331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_ml331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_objdetect331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_objdetect331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_objdetect331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_optflow331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_optflow331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_optflow331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_phase_unwrapping331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_phase_unwrapping331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_phase_unwrapping331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_photo331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_photo331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_photo331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_plot331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_plot331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_plot331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_reg331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_reg331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_reg331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_rgbd331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_rgbd331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_rgbd331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_saliency331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_saliency331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_saliency331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_shape331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_shape331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_shape331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_stereo331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_stereo331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_stereo331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_stitching331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_stitching331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_stitching331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_structured_light331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_structured_light331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_structured_light331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_superres331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_superres331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_superres331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_surface_matching331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_surface_matching331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_surface_matching331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_text331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_text331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_text331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_tracking331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_tracking331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_tracking331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_traincascade.exe',
 'C:\\Anaconda\\Library\\bin\\opencv_traincascade.exe.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_traincascade.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_version.exe',
 'C:\\Anaconda\\Library\\bin\\opencv_version.exe.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_version.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_video331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_video331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_video331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_videoio331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_videoio331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_videoio331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_videostab331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_videostab331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_videostab331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_visualisation.exe',
 'C:\\Anaconda\\Library\\bin\\opencv_visualisation.exe.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_visualisation.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_waldboost_detector.exe',
 'C:\\Anaconda\\Library\\bin\\opencv_waldboost_detector.exe.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_waldboost_detector.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_xfeatures2d331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_xfeatures2d331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_xfeatures2d331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_ximgproc331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_ximgproc331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_ximgproc331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_xobjdetect331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_xobjdetect331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_xobjdetect331.pdb',
 'C:\\Anaconda\\Library\\bin\\opencv_xphoto331.dll',
 'C:\\Anaconda\\Library\\bin\\opencv_xphoto331.dll.manifest',
 'C:\\Anaconda\\Library\\bin\\opencv_xphoto331.pdb']

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我想知道你们是否使用Windows，所以我强烈建议你们使用Ubuntu，它是免费的，你们可以在虚拟机上安装它。以下是如何从源代码安装OpenCV的分步教程：

---

它工作得很好，在安装过程中我从来没有遇到过任何问题

是的，我正在使用windows，我也在考虑迁移到Ubuntu，但首先我现在需要解决这个问题。下面是我如何解决这些问题的。如果有人也面临类似的问题，那么这可能会有所帮助：

cv2.dnn.readNet（）

至少需要opencv 3.4.2版本才能工作。1） 首先是将我的conda降级到4.6版本，以解决“为python xxxxxx寻找最短冲突路径”的问题，因为网络上的其他人也抱怨同样的问题，并使用了4.6版本2），然后我删除了opencv 3.3.1版本，并使用

pip install opencv python

安装了最新的opencv。