Finding all the X and Y coordinates of an image in python opencv

this post lets you know how to get the pixel of an image http://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_core/py_basic_ops/py_basic_ops.html

if you just iterate over the image in a nested for-loop you can perform whatever operation you want on said pixel eg, add x and y to an array if the colour isnt white

EDIT: i had to read up on what Chris commenting on the post meant by XY Problem but i agree, is there something youve tried and hasnt worked that youd like us to help fix?