I don't know of any plants that would be toxic to ball pythons (but you can take what I know about plants and fill a thimble with room left over to rattle around). However, I do know that ball pythons are heavy snakes who like to roam and push stuff around in their environment. Unless the plants are exceptionally sturdy and deeply rooted, the snake will likely crush and/or uproot them. Another concern is the moisture needed to keep the plants healthy. Constantly moist/wet soil can be bad for the snake.