Snake suddenly showing aggressive behavior

[Bogertophis]

I would also suggest learning how to communicate with your snake: they are nearsighted, deaf & food-focused, but have a good sense of smell, touch & body heat.

We humans are used to using vision & sound to communicate, but with snakes, you have to use THEIR best senses so THEY know what's going on & to avoid getting bit.

Snakes also have characteristic tendencies based on their species, as well as individual personalities, so it's up to YOU to find the best methods for YOUR pets. I live with
many rat snakes, for example, & when they're hungry, I can easily give them my scent by blowing across my hand in their direction so they "get" my scent & KNOW I'm
not incoming prey. That may or may not work for your BP, since they are more focused on heat signatures. Many boas & pythons do better with "touch" recognition,
aka "tap training" or similar signaling methods.

Remember that snakes live by their wild instincts: they can't afford to miss a meal- so they strike first & "ask questions later". Get used to it...your snake is not "mean"-
she's just being a snake, & to be successful, you just have to meet her halfway...just understand where she's coming from. Mistakes happen if you don't, & it's not her
fault.