People starting owning pythons as pets in the late 90s, due to snakes being glamorized in music videos and movies. The same way pitbull ownership went up in the 90s due to the dog being highly glamorized. However, unlike dogs, pythons can grow to enormous lengths, thus becoming extremely difficult and dangerous to own. Some owners were even killed by their own pythons.
Instead, of handing those snakes over to the zoo, or an exotic pet shop, owners simply threw the snakes in the Everglades with no remorse. And since the avg person does not understand how evolution works ( especially with reptiles!) , or that something just simply does not disappear, pythons procreated rapidly. Now, florida has the huge natural crisis on their hands, and it is just going to get worse, because reptiles focus on 2 things like no other creature: Eating and Reproduction.
Snakes can lay up to 70 eggs in a labor session, with the majority of the offsprings surviving.
The ignorance and negligence of man continues.
The only way to deal with this is to make it a food market! Hunt and sell them as a delicacy, and the numbers will decrease. However, pythons have high mercury concentration.