Corn Snakes
Corn snakes are relatively small (rarely exceeding five feet in length) active feeders, tolerate a wide variety of environmental conditions, come in a dazzling array of colours, and are very easy to breed.
This makes corn snakes a great choice as a pet snake. 
Company for Corn Snakes
Typically Corn Snakes are quite solitary and are quite content to live by themselves. Two females can generally be kept together, although they should be monitored to make sure that they don't become defensive.
Lifespan
Corn snake pets will generally have a lifespan of around 20 - 25 Years. This is achieved by feeding on disease-free rodents which have been bred for the purpose, having access to a constant clean water supply, and loving care from pet owners.