They are very very difficult to keep. No, I have never tried. I would not consider myself nearly able to provide for their needs. Most importantly, they are specialised lizard-eaters, and providing lizards for them on a regular basis is a strain on most keepers. Environmentally, individuals form different locations probably have specific needs related to those environments, and they can be complex. Although most snakes are fairly hardy, Langaha is not. As far as I know, there are maybe three or four breeders in the world? If that.