like below fixes the issue I have seen some of these installation issues before and found the easiest solution to be pip. Instructions can be found here If you already have pip installed, simply run pip install opencv-python from your command line. You may have to clean up some of your old installation attempts for this to work, but try it first and test it real quick with something like python -c "import cv2; print(cv2.__version__)". You should get something like 4.0.0 as a response.
Gtk-Message: Failed to load module "canberra-gtk-module"