PyQt5 and OpenCV have similar libraries; how to avoid conflict between the 2?

Question

I have PyQt5 and OpenCV in the same conda virtual environment.

opencv-python==3.4.1.15    
PyQt5==5.10.1    

Whenever I run my PyQt5 app, I get many warnings like these:

objc[7992]: Class QCocoaPageLayoutDelegate is implemented in both /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/cv2/.dylibs/QtGui (0x109ae0290) and /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/PyQt5/Qt/lib/QtPrintSupport.framework/Versions/5/QtPrintSupport (0x10a387f20). One of the two will be used. Which one is undefined.
objc[7992]: Class QCocoaPrintPanelDelegate is implemented in both /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/cv2/.dylibs/QtGui (0x109ae0308) and /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/PyQt5/Qt/lib/QtPrintSupport.framework/Versions/5/QtPrintSupport (0x10a387f70). One of the two will be used. Which one is undefined.    
objc[7992]: Class QCocoaApplicationDelegate is implemented in both /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/cv2/.dylibs/QtGui (0x109ae0010) and /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/PyQt5/Qt/plugins/platforms/libqcocoa.dylib (0x10c6ed480). One of the two will be used. Which one is undefined.    
objc[7992]: Class QNSApplication is implemented in both /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/cv2/.dylibs/QtGui (0x109adffc0) and /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/PyQt5/Qt/plugins/platforms/libqcocoa.dylib (0x10c6ed4d0). One of the two will be used. Which one is undefined.    
objc[7992]: Class QCocoaMenuLoader is implemented in both /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/cv2/.dylibs/QtGui (0x109adff70) and /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/PyQt5/Qt/plugins/platforms/libqcocoa.dylib (0x10c6ed570). One of the two will be used. Which one is undefined.    
objc[7992]: Class QNSImageView is implemented in both /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/cv2/.dylibs/QtGui (0x109ae0330) and /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/PyQt5/Qt/plugins/platforms/libqcocoa.dylib (0x10c6ed660). One of the two will be used. Which one is undefined.    
objc[7992]: Class QNSStatusItem is implemented in both /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/cv2/.dylibs/QtGui (0x109ae0380) and /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/PyQt5/Qt/plugins/platforms/libqcocoa.dylib (0x10c6ed6b0). One of the two will be used. Which one is undefined.    
objc[7992]: Class QNSOpenSavePanelDelegate is implemented in both /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/cv2/.dylibs/QtGui (0x109ae0150) and /Users/alexryan/miniconda3/envs/qacker/lib/python3.5/site-packages/PyQt5/Qt/plugins/platforms/libqcocoa.dylib (0x10c6ed750). One of the two will be used. Which one is undefined.

What is the appropriate way to handle this?

Answer 1

I solved the problem by uninstalling opencv with the GUI and installing the headless version:

pip uninstall opencv-contrib-python

pip install opencv-contrib-python-headless

The namedWindow function in opencv still works.

Answer 2

In my case, I solved the problem removing opencv-python

pip3 uninstall opencv-python

and then installing opencv-headless

pip3 install opencv-python-headless

After that, my application run again.