I have a corn snake, with one tom cat but he can't be bothered by the snake, I have showed him it but all he did was sit there and look at me as if to say:"well isn't that a pointless pet.." aha! he did not look impressed, he then continued to laydown and groom himself. I also have a dog that attempts to "play" with the snake when he sees me holding him, hell bring the ball over to him and set it down. lol
the funniest by far though has to be my male Bette splenden, he HATES the snake! I brought the snake over to his tank just to see his reaction and the fish started flaring up his fins and darting side to side! needless to say they don't meet each other anymore..
sorry to get a bit off topic, but I think cats and snakes can live in the snake house with out any issues, asking as the owner is smart about it.