Yes, I do know that, but ball pythons are generally not known for cannibalism. Not saying it hasn't happened! I know it has. But it's not like we're talking about kingsnakes here. I'm just saying, in my personal opinion, that I would rather two similarly sized ball pythons cohab for 8 hours than risk a cold night with no heat. I mean, 8 hours is shorter than most people put them together to breed.
Not to mention to OP made sure they had plenty of places to escape one another, not like they were crammed together.
I am in NO WAY advocating for cohabbing, I'm simply stating an opinion.