I'm not sure if this is what LGray23 ment, but boas will eat pythons so you want to be careful with that. Also, boas can carry ibd without symptoms and while a boa has a slight chance of surviving as far as I know it's always deadly in pythons. After quarantine I don't see why they can't be kept in the same room.
It's still always fatal with boas, but they can be asymptomatic carriers for years. Pythons, on the other hand, will typically die within a month.
2.0 Normal ball pythons, Java and Nyoka
0.0.1 Boa Constrictor Imperator, Hexadecimal
0.0.1 Snow Corn, Yumi
0.2 Mutt cats, Dizzy and Sumomo
1.0 Shiba Inu, Hokkaido