If there is snot forming at the nose, then the animal probably has a Respiratory infection. Burmese Pythons, and African Rock Pythons are very sensitive to temperatures and humidity, as well as changes in them. If the animal doesn't get helped, it will more than likely die. The animal is not being cared for properly, which can and will count as a form of abuse and mistreatment which animal control will enforce. Call them up and report it. The owner will more than likely get a ticket/fine, and it will possibly change his mind about his husbandry practices.