how to import cv2 and numpy in Choregraphe for NAO robot?
It depends if you're using a real NAO or a simulated one.

Simulated one: choregraphe use its own embedded python interpreter, even if you add library to your system it won't change anything
Real NAO: the system python interpreter is used, you need to install those library to your robot (and not to the computer running choregraphe). As pip ofthen doesn't work fine in NAO, you'll have to manually copy library to /home/nao/.local/lib/python2.7/site-packages
I'm doing a project that require cv2 and numpy in one of the scripts using choregraphe, but I get an error :
No module named cv2/numpy.
I think it is because choregraphe has its own python interpreter but I do not know how to install cv2 and numpy into the python of choregraphe.
How can I do it?