Arboreal species for a 4x2x2 enclosure

[Bogertophis]

Australian spotted pythons are nice. But, I think I've prefer a bit larger (though, not definitely). How big is yours, and how big you think the females get?

As I said, mine ("she") is about 4' long, maybe a little longer, as she's hard to measure (she's not inclined to straighten out).

The trouble with your "ask" is that most really arboreal snakes aren't known for their "social suitability", having both sizable dentition & the inclination to use it.

My adult Trans Pecos rat snakes are a little bigger (4.5 - 5' long) and they excel at handling (docile, not biters, like handling). And they do use their branches quite a bit & gracefully, but I wouldn't classify them as arboreal. The adults should have a wider home than just 2', even though they enjoy & use branches (& also baskets wired to them for platforms).