Some neonates are naturally agressive. But she could just be an agressive Ball Python. I've got a Lesser Platty that thinks she's a viper. She hisses as soon as I pull out of her tub. She'll then starts striking as soon as my hand gets near her. She stops biting after I have her in my hands, but I keep one hand right behind her head to prevent her from striking.
But she is a really good eater, so I live with the agression.
The only thing I can suggest, since she's so young, just continue to handle her. She may calm down.
Good Luck!
Jim Smith