https://pyimagesearch.com/2015/04/20/sorting-contours-using-python-and-opencv/
Sorting Contours using Python and OpenCV - PyImageSearch
Apr 17, 2021 - In this article I'll show you how to sort contours by their size and direction. Learn how to sort contours top-to-bottom, left-right, using Python + OpenCV.
python and opencvsortingcontoursusingpyimagesearch