It appears to me that from what I've seen in the hobby these days, what are being identified, advertised and accepted as Jungle Pythons come in a variety of dorsal colours and patterns including strong black and yellow banding or blotching, a combination of black and yellow banding and blotching, white or light grey with black banding or blotching and a combination of white or light grey with black banding and blotching. This is evident with a simple Google search for Morelia cheynei and might be the reason why some may consider this snake to be what's referred to in the hobby as a "Jungle Jag".
However; what appears to be evident with this snake is that the dorsal markings are strikingly similar to the Holotype used to describe the species Morelia cheynei by Wells and Wellington in their "Synopsis of the Class of Reptilia in Australia: Volume 1 No's 3-4 Australian Journal of Herpetology, 1 December 1983. I.E: "Coloration (in formalin): Overall body colour whitish faun with large black, irregular blotches laterally which are transversely aligned. The anterior of the body has a narrow black vertebral stripe extending from the nape along the first quarter of the body, where it dissipates upon contact with with lateral blotches"
So in all honesty, whether this animal is a result of a pairing of snakes collected from the type locality (or descendants thereof) or something produced through design I believe that this snake can be confidently classified as what's currently accepted as a Jungle Python (Morelia cheynei).
By the way it is a very nice looking critter.