问题：You might be loading two sets of Qt binaries into the same process 本文用于记录一下解决问题的过程，若只需解决方法可以直接看文章最后部分
本文出现的问题应该是在Mac上才会出现
系统：Mac os 10.14
pyqt/opencv安装均在anaconda虚拟环境下进行
在使用opencv以及pyqt时出现以下错误
objc[2623]: Class QMacAutoReleasePoolTracker is implemented in both /anaconda3/envs/face/lib/python3.7/site-packages/PyQt5/Qt/lib/QtCore.framework/Versions/5/QtCore (0x116bc90f8) and /anaconda3/envs/face/lib/python3.7/site-packages/cv2/.dylibs/QtCore (0x11ef14700). One of the two will be used. Which one is undefined. objc[2623]: Class QT_ROOT_LEVEL_POOL__THESE_OBJECTS_WILL_BE_RELEASED_WHEN_QAPP_GOES_OUT_OF_SCOPE is implemented in both /anaconda3/envs/face/lib/python3.7/site-packages/PyQt5/Qt/lib/QtCore.framework/Versions/5/QtCore (0x116bc9170) and /anaconda3/envs/face/lib/python3.7/site-packages/cv2/.dylibs/QtCore (0x11ef14778). One of the two will be used. Which one is undefined. objc[2623]: Class KeyValueObserver is implemented in both /anaconda3/envs/face/lib/python3.7/site-packages/PyQt5/Qt/lib/QtCore.framework/Versions/5/QtCore (0x116bc9198) and /anaconda3/envs/face/lib/python3.7/site-packages/cv2/.dylibs/QtCore (0x11ef147a0). One of the two will be used. Which one is undefined. objc[2623]: Class RunLoopModeTracker is implemented in both /anaconda3/envs/face/lib/python3.7/site-packages/PyQt5/Qt/lib/QtCore.framework/Versions/5/QtCore (0x116bc91e8) and /anaconda3/envs/face/lib/python3.7/site-packages/cv2/.dylibs/QtCore (0x11ef147f0). One of the two will be used. Which one is undefined. QObject::moveToThread: Current thread (0x7fcc2cb0a6c0) is not the object’s thread (0x7fcc2f06cf20). Cannot move to target thread (0x7fcc2cb0a6c0) 关键信息 You might be loading two sets of Qt binaries into the same process. Check that all plugins are compiled against the right Qt binaries. Export DYLD_PRINT_LIBRARIES=1 and check that only one set of binaries are being loaded. qt.qpa.plugin: Could not load the Qt platform plugin “cocoa” in “/anaconda3/envs/face/lib/python3.7/site-packages/cv2/qt/plugins” even though it was found. This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem. Available platform plugins are: cocoa, minimal, offscreen, webgl. 解决方法一 在路径/anaconda3/envs/face/lib/python3.7/site-packages/cv2/下删除qt文件夹即可
但是这么做存在一定问题：在删除qt文件夹后正常的只含有cv2的程序无法正常运行（显然是拆东墙补西墙）
但是应急的话应该是没问题的
解决方法二——最终解决 出现问题的原因在于mac版本下安装的opencv包含有一些qt的头文件与pyqt中的发生了冲突，导致无法正确导入相应的包，需要将其更换
按照以下步骤进行
删除原有的opencv，删除过程中出现y/n选择y即可 pip uninstall opencv-python 安装opencv–headless版本 pip install opencv-contrib-python-headless 至此应该就可以同时正常运行cv2和pyqt了
