python继承

多继承

• 有相同的祖先

class Base:
    def test(self):
        print("----Base")

class A(Base):
    pass
    # def test(self):
    #     print("-----A")

class B(Base):
    def test(self):
        print("-----B")

class C(A,B):
    pass

c = C()
c.test()

#调用方法查找顺序 类名.__mro__
print(C.__mro__)

结果：
-----B
(<class '__main__.C'>, <class '__main__.A'>, <class '__main__.B'>, <class '__main__.Base'>, <class 'object'>)

• 有不同的祖先：

class Base:
    def test(self):
        print("----Base")

class Base2:
    def test(self):
        print("----Base2")

class A(Base):
    def test(self):
        print("-----A")

class B(Base2):
    def test(self):
        print("-----B")

class C(A,B):
    pass

c = C()
c.test()

#调用方法查找顺序 类名.__mro__
print(C.__mro__)


结果：
-----A
(<class '__main__.C'>, <class '__main__.A'>, <class '__main__.Base'>, <class '__main__.B'>, <class '__main__.Base2'>, <class 'object'>)

调用被重写的父类的方法

class Person:
    def eat(self):
        print("---person eating---")

class Man(Person):
    def eat(self):
        #调用被重写的父类的方法
        #第一种方法
        Person.eat(self)
        #第二种方法
        super().eat()
        print("---man eating---")

h = Man()
h.eat()