* python binding for viz
tutorial widget pose
reset
test_tutorial 2 & 3
sample py
9 test sur 22
test PyWCloudNormal
16 sur 22
end?
python test
* oops
* bug
* comment but( this is not solved https://github.com/opencv/opencv_contrib/pull/2882#discussion_r591659839
* review 2
* oversight
* oversight oops
* viz: move out Py* classes from public C++ headers
* viz: recover PyColor
Co-authored-by: Alexander Alekhin <alexander.a.alekhin@gmail.com>
