64.Python：菱形问题与mro介绍

# Python learning
# coding:utf-8


class A:
    def test(self):
        print('from A')


class B(A):
    def test(self):
        print('from B')


class C(A):
    def test(self):
        print('from C')


class D(B, C):
    pass


obj = D()
obj.test()

print(D.mro())  # 类以及该类的对象访问属性都是参照该类的mro列表
#    [<class '__main__.D'>, <class '__main__.B'>, <class '__main__.C'>, <class '__main__.A'>, <class 'object'>]
print(C.mro())
#    [<class '__main__.C'>, <class '__main__.A'>, <class 'object'>]

#  总结：类相关的属性查找（类名，属性、该类的对象，属性），都是参照该类的mro