python的多重继承

先写规律：子类可以调用所有父类中的方法，但是如果遇上方法重名python的多重继承是遵循从左往右继承，深度优先，不多说直接上代码

class grandfather:
    def speak(self):
        print("this is grandfather_def")


class father(grandfather):
    def speak(self):
        print("this is father_def")


class son(father):
    def speak(self):
        print("this is son_def")


class son2(grandfather):
    def speak(self):
        print("this is son2_def")


class myclass(son, son2):
    def speak(self):
        print("this is myclass_def")

obj = myclass()
obj.speak()  # 执行结果：this is myclass_def

#先执行myclass里的speak方法

class grandfather:
    def speak(self):
        print("this is grandfather_def")


class father(grandfather):
    def speak(self):
        print("this is father_def")


class son(father):
    def speak(self):
        print("this is son_def")


class son2(grandfather):
    def speak(self):
        print("this is son2_def")


class myclass(son, son2):
    pass

obj = myclass()
obj.speak()  # 执行结果：this is son_def
#执行的是son类里的方法

class grandfather:
    def speak(self):
        print("this is grandfather_def")


class father(grandfather):
    def speak(self):
        print("this is father_def")


class son(father):
    pass


class son2(grandfather):
    def speak(self):
        print("this is son2_def")


class myclass(son, son2):
    pass

obj = myclass()
obj.speak()  # 执行结果：this is father_def
#执行的是father类的方法

class grandfather:
    def speak(self):
        print("this is grandfather_def")


class father(grandfather):
    pass


class son(father):
    pass


class son2(grandfather):
    def speak(self):
        print("this is son2_def")


class myclass(son, son2):
    pass
obj = myclass()
obj.speak()  # 执行结果：this is son2_def
#执行的是son2类里的方法

class grandfather:
    def speak(self):
        print("this is grandfather_def")


class father(grandfather):
    pass


class son(father):
    pass


class son2(grandfather):
    pass


class myclass(son, son2):
    pass
obj = myclass()
obj.speak()  # 执行结果：this is grandfather_def
#执行的方法是grandfather类的方法