Bingo to the above post. At 5am one morning I'm sitting on the edge of our bed and I reach down to put my socks on and I notice the Mini-Mag flashlight we keep next to our BP Humphrey's cage is on the floor. Then I look up further and his front opening door is, well, open.
I get wifey awake and we comence to CAREFULLY move things off the bedroom walls, check the walk-in closet, etc. No luck. On the way home from work (knowing snakes fear of heights) I had an idea. Low and behold when I got home I was right. He had crawled out during the night of his enclosure knocking the flashlight to the carpet and being his tank is about 4 feet up, decided to simply cruise about 1 foot from where he left his enclosure and curled up UNDER his tank next the UTH.
Good luck! Of course, the bigger the snake the easier it to find 'em. Humphrey at the time was only about 13 inches long.
Okay, glad you found her! Of course if she got out once, I'd look for her to do it a second time. Our BP got out because Debbra forgot to latch the doors shut on his tank.