I doubt the zoo would take in a ball python. The best way to rehome a snake would be post local ads or contact local herpers who work with them.
I may have misinterpretted what you are saying at the end, so no offense meant- Just so you know it is illegal to release an animal, animals escaping or being released is one of the reasons that people use in order to try to ban pythons/reptiles. To release a snake would be as damaging to the reptile community as it would be cruel to your snake.