You can use a hand towel to cover your ball python if you ever need to remove it from its enclosure or move it from somewhere like you needed to tonight..
If its acting defensive, just lay a small towel over its head and then quickly scoop it up. Or like tonight, hold the towel over its head with one hand while using your other hand to unwrap it.
I believe your new one is just stressed from the move and new environment. Once you have it's enclosure properly set up with proper heat, humidity, hides, and it's eating well for you, I'm sure everything will change. It also may not have been handled very much at its previous home.