Here are two pictures of the cage (the cage of Python X is exactly the same as Python Y's cage).

http://ibb.co/g6nvw6
http://ibb.co/b86oG6

Temperature right under the hotspot is 50 degrees celsius (122 degrees fahrenheit), but that's because the lamp is shining right on the measure point, so I also measured the temperature a few cm's away from the hotspot and its 34 degrees celsius (93 degrees fahrenheit). The temperature on the cool side (above the shelter) is 28 degrees celsius (82 degrees fahrenheit).

What I forgot to say about Python X is that I used to feed him in a separate box, so not in his tank (he also ate the first frozen rat, which I mentioned, in this box). Maybe if I give him live in his tank for a while, he will get used to eating in his tank which makes it maybe easier to switch to frozen in his tank.