【3.5】类和实例属性的查找顺序--mro查找

class D(object):
    pass


class C(D):
    pass


class B(D):
    pass


class A(B, C):
    pass


print(A.__mro__)

利用__mro__属性可以答应出查找顺序

(<class '__main__.A'>, <class '__main__.B'>, <class '__main__.C'>, <class '__main__.D'>, <class 'object'>)