Hello,

For starters, I hope you've learned your lesson. You must keep Ball Pythons in a locking enclosure to prevent escaping.

Now that you've been lectured try this.

Put a smaller tank in the middle of the room with a heat pad under it. Drop the temperature of the room. You'r snake, if it's in the room, will find its way to the warm spot. Another think you can do, although messy, is to put rice all over the room, and in the morning see if you see any tracks. Another idea I've heard people doing is taking shopping bags and putting them all over the room, so you'll hear the crinkling as they move over the bags.

Look around your house under and near anything that radiates heat (such as TV's, computers, appliances)

good luck!