Python多继承子类的方法溯源规则

class A():
    def __init__(self):
        pass
    def save(self):
        print "This is from A"
class B(A):
    def __init__(self):
        pass
class C(A):
    def __init__(self):
        pass
    def save(self):
        print  "This is from C"
class D(B,C):
    def __init__(self):
        pass
test = D()
test.save()

经典类的答案： This is from A

新式类的答案： This is from C