Apparently Stimson's are known for this to some extent. See below. I just googled Stimsons Python and clicked on images. This came up pretty early on.
Yes, they are, which is why they're not recommended as a beginner snake even though their husbandry is no more difficult than a ball python and they stay fairly small. Most new keepers haven't learned to deal with and laugh off a nip or even a food bite from a snake.