Help with multi-point plotting

[pv33]

@drjsmith
Turns out I need to plot multiple points on an image in openCV. The obvious answer is to run drawMarker in a for loop, but that seems silly since a Matlab-ization of things would permit passing vectors so that internally vectorization could be used.

Does python / openCV API permit marking multiple points in an image cleanly?
It doesn't even have to a marker but can be a manually placed 2x2 pixel box with a specified RGB color. Anything that lets me see what the outcome of my processing is for debugging purposes. Just want it to be zippy.

Would love to have an answer today. Will do drawMarker loop in absence of something better, but would love the better.