I have a female jungle that was very aggressive when we got her. In fact, that's WHY we got her. The original owner was tired of getting bitten by her.

We've had her for about 6 months and, with some handling she's calmed down quite a bit. It now takes over 15 minutes before she bites us and she's no longer defecating to get away (let me tell ya, THAT was fun!)

She will still try to bite and you have to be careful getting her out of her cage. I decided when we got her that, if she stayed aggressive, we would do the best we could and after that she could just be a display snake if that is what she wanted.

Good luck with yours!