Python uses duck typing, though.  Maybe someone is depending on those public attributes not getting coerced to boolean.  Probably not, granted, since they are newish, but a python programmer might expect the value to get passed through.  I'm of two minds about the advisability of that, but given that someone *could* be depending on it, I think it would be better to not do the bool call, since there is no bug fixed by doing the bool call, making it an unnecessary change in behavior.