Its okay…
There are two ways: one is my way, and the your way.
I already told you—I don’t want to install it locally, so I added a temporary location for runtime:
export PYTHONPATH=/home/cnc/You/build/opencv/build/lib/python3:$PYTHONPATH
Why don’t you run that command?
sudo make install
If you don’t understand how environment variables work,
it’s difficult to troubleshoot.
You must learn some basics.
Purpose loses meaning without a foundation of knowledge.