How can you tell adifferrence from female snakes and male snakes?

It is very hard to identify a snakes gender, The best way to find out is to get it probed. Probing is when they slide a small metal rod into it cloaca (genital hole). The prob tends to go in further for a Male and in very short for a Female. I will advise for a professional to do this procedure as you could really harm the snake.