How can I get my mom to let me have a pet snake?

I really want to get a ball python and have always loved snakes. I don’t think my mom would let me have one without me pulling a few strings first. Does anyone know of how I can get her to let me have a snake? I know the standard quotas like sucking up to her. Acting very good and doing lots of chores. Yeah yeah I got that I just need to pull some strings that most people don’t see. Any ideas?