how to interact with the model and env using mouse

[Sam100]

hello, friends,
-- I am new to pybullet, I need using mouse to pick some object in the pybullet, but my gui scene cannot be rotate by mouse, and the object cannot be picked up by the mouse, so what's wrong with my bullet.
-- another issue is my bullet explorer has no API, examples, etc, these folders as the developer shown in his video, my computer is ubuntu 20.04, with opengl 4.6.0, navidia 3080, any friends know what's the problem
Thanks