So how do you gauge insecurity over aggression or cranky temperment in a young ball python?

Do they grow out of it?

I get striking at me from within the tub might be a baby thing or insecurity with being a new arrival but what about someone else holding her and she is trying to strike at me-not once but multiple times?
or when you are holding them and they just strike. I had warning because she was in that pose but she just kinda stays that way and then picks her moment. I tried cover her with my other hand to get her to ball back up but she goes right back into her strike mode pose my daughter calls it.