This is my personal learning note of OpenCV-Python Tutorials for beginners.
It starts from "Basic Operate" to "Machine Learning" step by step.
At last, I concluded a mind map of this tutorial.
Running sample should use "cwd" as work directory.
cd opencv-tutorial-notes/cwd
python ../02-gui/01-images.py 
Most of notes are comment at code file.
Documents about feature, camera, machine learning also publicized on my blog and written by English.