Don't be ridiculous. Peanuts originated in africa. The ball python comes from africa, therefor peanut butter is perfectly fine for them to eat. Not to mention they will have even better traction with peanut butter, and any sap that sticks to them will come RIGHT off with peanut butter.
The little black things are symbiotic and necasary for the health of a large well-established colony. You should put turtles in the bottom, they will eat the snake poo.
Just helping.