Actually, don't assume all Australian Pythons make good pets, and won't bite though. Some, like the Macklot's Python, and Scrub Python(aka Amythistine Python) and several other's are pretty notorious for being biters. But I will say that I had some Macklot's that ONCE OUT of their cages were fine,....it was when you walked near the cage, and the lid was being taken off they would eat whatever moved, and I do mean that quite literally, not just a nip, but a "full-blown eating assault, complete with grabbing your entire hand and constricting the crap out of your hand/arm for several minutes, until they were finally able to be unwound......very painful, and very bloody when this is done by a large eight foot adult female..LOL!.
Once they were carefully pulled out with a snake hook, they knew food was not being offered, they were absolutely fine though..LOL!. Those Macklot's Pythons are true "eating machines", and many will only wonder what they have grabbed well after the fact. They are not unlike some of the getula complex of Kingsnake, they are also known to charge the lid looking to eat absolutely anything that moves.
The Boa family tend to have a much slower metabolism, and as a general rule, aren't so fast to grab anything that moves to eat it, but that doesn't mean they won't strike with a good bite out of feeling threatened.
I hope all this doesn't turn you off to the idea of owning one of these, as I am just trying to point out some reality about owning certain snakes, as I have had countless many in the past several decades.
The bottom line is there is no real one answer that applies to all, you just have to hopefully begin with one that seems to be a little better than some others, and get to know each other from having frequent handling sessions. Over a period of time, you will get to know the particular animal, and get a good "feel" for how it reacts to different situations. After a while, you will grow to be confident in how it perceives and reacts to it's environment.
This might seem like vague advice, but it really is how it goes with owning certain snakes.
best regards, ~Doug
-----
"Better to be silent and thought a fool, than to open mouth and remove any doubt!"