Most pythons don't eat cold blooded prey. (there are exceptions) Eastern hognose do prefer toads, Viper boas will eat frogs, Indonesian tree boas eat lizards like geckos. The problem with feeder lizards and amphibians is that (in the US) they are pretty much all wild caught and thus full of parasites. Your snake will pick these up and they could get out of control in captivity. In captivity, they live, eat, and drink were they also defecate.