Ball python aggression?

I recently bought a ball python from a local breeder and it seems pretty aggressive. Its a baby pastel ball python and i've had it for about a week and a half now. It was very calm and docile the first day i got it, the owner held it while we talked, i held it for a while, then my dad held it for about 15 minutes then put it in it's cage. I heard it was good to leave it be for a few days, so i waited about 4 days before trying to hold it. The problem that i'm having is that 80% of the time i come by the tank, my snake flicks its tale, then snaps at me through the gl. I still tried holding it after the four days, but after snapping at me twice, i put it back in the tank. I've tried two more times, and have the same result each time. This is my first ball python, so i'm not sure what to do. It'll snap at my hand or in the direction of my face, but never actually connects. I've yet to be bitten by a ball python since this is my first, so i'm still a bit afraid of the bite, even though i know people say it doesn't really hurt. I took it out to feed it, and it ate. I fed it a frozen fuzzy mouse. The breeder said they are trying to wean it into hoppers, so i bought some frozen hopper mice. Its been a week tomorrow since it ate. So i was just wondering what i can do to get my snake more docile, because i've heard that they're very docile snakes.