Itīs a Green Tree Python (GTP). An arboreal snake natural to Papua New Guinea and Cape York peninsula (in Northern Australia).
The latin name used to be Chondropyhton viridis when it was though to be monospecific; further studies included GTPīs in the Morelia complex, so, for some years now, the correct scientific name is Morelia viridis.
But, the name "chondro" remained.
p.s.: Rapture,
He/she looks great. Any updated pics? Mine changed (the most part) in about 2 months. You may find some pictures in this sub-forum