Where is OpenCV-Python mannual/document

edit

http://docs.opencv.org/3.1.0/d6/d00/tutorial_py_root.html#gsc.tab=0 give the tutorials of OpenCV-Python.

From there we can see many examples in python.

But, starting to implement applications of opencv in python, we need a mannual describe all the detail syntax of OpenCV-Python.

After searching a while, I can not locate mannual of OpenCV-Python. Where is it ?

Thanks