Variable de classe dans une autre classe ?

class Un:
    def __init__(self):
        self.truc = 0
    def getTruc(self):
        return(self.truc)
    def setTruc(self,truc):
        self.truc = truc

class Deux:
    def __init__(self):
        self.chose = 0
    def setChose(self,chose):
        self.chose = chose
    def test(self,truc):
        if self.chose == truc:
            print("Hello")
        else:
            print("Goodbye")

a = Un()
b = Deux()

# self.truc != self.chose
a.setTruc(3)
b.setChose(4)
b.test(a.getTruc())

# self.truc == self.chose
b.setChose(3)
b.test(a.getTruc())