How can I convince my mom to get me a ball python?

Me and my step dad love snakes! My mom loves animals too but she doesn't think that we take care of the animals that we already have. We have 4 dogs and they are super healthy, 1 macaw and hes healthy, and 2 parakeets that are SO afraid of anybody that comes near them. My mom also doesn't like that snakes have to have live food,but the lady at the pet store said that ball pythons are the easiest and sweetest kind of snake they have and that they even eat frozen mice that you can just thaw out and put in a bowl for them. Is there any ways that you can help me convince my mom into getting me and my step dad a ball python? Please help!!! The person with the best advice gets 10 points!!!!!