There are potential problems with mixing the two species.
1) Environment: Russians like it dry. Irian Jaya is a tropical setting with potentially high humidity. I don't know the particular needs of the python, but if it needs high humidity, at least compared to the russian, then the tortoise may suffer upper respiratory problems. Or if it is too dry, then problems will arise for the python.
2) Predator and non-predator: The python is a predator and when compared to this small tortoise, a very large predator. While the python may not feed on tortoises, I imagine it would be very stressful for the tortoise to be in the same enclosure with a large predatory animal. The russian needs to be out in the open to bask and feed. If it feels intimidated by the python, it may hide and suffer.
3) Incompatible microbes: I assume the tortoise is wild caught (most russian tortoises are). It may still harbor some parasites or other microscopic organisms that while not harmful to itself, may prove to be harmful or deadly to the python. The python, while possibly captive-bred, may also carry its own set of microbes that are beneficial to itself but potentially harmful to the tortoise.
I say don't do it mostly based on 1 and 2 above. Keep them each in an enclosure optimized for the animal's individual needs, and don't stress the tortoise by keeping it with such a large predator. #3 may also be a problem, although I don't know the actual risk.