That B&W diamond python pic looks edited from colour to monochrome - I've never seen a B&W diamond python that has no trace of any other pigments. And even the light play on the scales is colourless...
Fair point- what a bother photoshop can be when you’re looking for the true colour of an animal!
In saying that I have seen some footage (I’ll see if I can find it...) of a similar animal to the one pictured. From what I could tell it was pretty convincing black and white.
I’ve also seen a wild one in my area which was also pretty similar in terms of colouration (in saying that I only got a brief glimpse in the dark with a flashlight before he disappeared into the roof!)