The snake may not even belong to a dancer. In which case, they've hired it and it goes home with what I hope to be a great caretaker
Judging from the way that the girl handled the snake I would be willing to bet that it belongs to her. She was too at ease with it.

Pythons and boas have been used in dance routines for a long time. Everything from belly dancers to strippers!
The dancers I have known who used snakes in their acts owned them and because they were part of the way they made their living, treated them like babies.