Neither, it just let's you write code that runs on 2 and 3 quite easily, by hiding import differences and changes to builtins. It's worth it if you are distribu

Neither, it just let's you write code that runs on 2 and 3 quite easily, by hiding import differences and changes to builtins. It's worth it if you are distributing code that has to run on 3 and 2, but if your upgrading your existing 2 code base it's not that great.