Ball pythons can go many weeks and sometimes even months without moving their bowels, it's perfectly normal.

Cage temps should be 82-84 on one side and 92-94 on the other. With temps cooler than 80 you run the risk of causing a respiratory infection or causing your snake to start refusing food. You need to provide these temps 24 hours a day 7 days a week.

Hope this helps.

-adam