cv2.cpp.o c++: fatal error: killed signal terminated program cclplus compilation terminated. cv2.cpp requires up to 2+GB for compilation. Check dmesg for OOM killer messages. Workaround - increase ...

If you insist on using Python 2.7, then you are stuck with the latest supported release which is 4.2.0.32. Please update to Python 3.8 and you can enjoy all the latest OpenCV features.

The reason why the pip install command doesn’t work in Ubuntu 23.04 is down to an intentional shift in policy (also taken in Ubuntu’s upstream, Debian) to avoid conflicts between the Python package ...