How to handle different modules of opencv and opencv-contrib??

[geroldmeisinger]

I want to add a edge drawing preprocessor which requires opencv-contrib-python . but as the official docu states:

https://pypi.org/project/opencv-python/#installation-and-usage

There are four different packages (see options 1, 2, 3 and 4 below) and you should SELECT ONLY ONE OF THEM. Do not install multiple different packages in the same environment. There is no plugin architecture: all the packages use the same namespace (cv2). If you installed multiple different packages in the same environment, uninstall them all with pip uninstall and reinstall only one package.

If any non-contrib module is installed I get errors like AttributeError: module 'cv2.ximgproc' has no attribute 'createEdgeDrawing'.

requirements.txt, mediapipe and albumentations all require opencv-python-headless. Some node_wrappers have lines like run_script([sys.executable, '-s', '-m', 'pip', 'install', 'mediapipe']) which will again install non-contrib modules. all of them are installed in the same environment as ComfyUI, so if any custom node down the line installs a non-contrib module, everything breaks again.

What is the official way to handle these modules in the ecosystem?

[geroldmeisinger]

also see:

• About packages opencv/opencv-python#896
• avoiding multiple PIP packages installation opencv/opencv-python#677
• [Suggestion] Metapackage as solution to current issues with opencv as dependency opencv/opencv-python#987
• https://discuss.python.org/t/conditional-package-install-depending-on-other-packages-in-environment/4140/4?u=dcnieho
• --no-deps flag inside requirements.txt pypa/pip#9948
• Package conflict between opencv-python and opencv-python-headless opencv/opencv-python#467
• conflict opencv-python and opencv-contrib-python opencv/opencv-python#388

comfy specific:

• user-configurable package version settings ltdrdata/ComfyUI-Manager#554

apparently it also depends on the order of installation:
pip install opencv-contrib-python opencv-python (doesn't work)
is not the same as
pip install opencv-python opencv-contrib-python (works)