Well, I do know that pythons have some pretty interesting digestive systems; they put a lot of energy into breaking down whatever they've eaten and they take their time doing it. All those squeezing muscles just crush and pulp - like a living Chinese finger trap. Just throwing a disgusting theory out there, but I'd say that the bones of whatever was in the creature they ate would eventually poke holes in the skin/hide with all the squeezing, allowing the snake digestive juices inside and, eventually, the snake poops out whatever couldn't be digested. I.e. your suitcase material, croc teeth, bones, spare change. Eh, we need a herpetologist up in the hizzie.