The conclusion to be drawn is. The snake did not enter through the door. One possibility is eliminated.
Oh...Wait...Maybe the snake did enter through the door and when he tried to lock it, he broke the lock.
Once the snake was found, My wife would not sleep until I could solve the snake entry problem..
And for sure my wife would never walk into the bedroom and demand I get up to remove a snake from the bedroom. She would have let out several bloodcurdling screams, and would have been out the door like she was on fire. I would have needed to chase her down the road, so I could find out what her problem was.