Why would you want to ship a snake and have it take a week, let alone a month? I had a snake stuck in a box over the weekend and I was a nervous wreck! So was he, as a matter of fact, and came out biting, and refused to eat for a couple weeks. I think after a month in a box---if it survived, which I doubt---the poor thing would be so dehydrated and stressed it would never recover, anyway.
There are a couple global shippers out there that will overnight... check 'em out. You'll spend a little more, but you'll also have a happy, healthy snake.