IF I understand your question correctly...you need some sort of temporary housing for your ball python until July 15th when you can get it into a permanent home?

If that's the case....head out to WalMart (or similar store) and pick yourself up a shallow plastic tub with a snap-on lid. Melt some holes at the ends and around the sides with a soldering iron (or drill them...but this risks cracking the tub). Use newspaper or papertowels as a substrate. Toss in a hide and a water dish.....place in a room that will maintain ~80-85 temps.....and you'll be golden.

(Oh...and make sure that lid is secure! LOL)