三重继承导致元类冲突......有时候

class ParentClass1:
    def method1(self):
        print("This is method 1 in ParentClass1")

class ParentClass2:
    def method1(self):
        print("This is method 1 in ParentClass2")

class ChildClass(ParentClass1, ParentClass2):
    pass

child_instance = ChildClass()
child_instance.method1()  # This is method 1 in ParentClass1

class ParentClass1:
    def method1(self):
        print("This is method 1 in ParentClass1")

class ParentClass2:
    def method1(self):
        print("This is method 1 in ParentClass2")

class ChildClass(ParentClass1, ParentClass2):
    def method1(self):
        ParentClass1.method1(self)
        ParentClass2.method1(self)

child_instance = ChildClass()
child_instance.method1()  # This is method 1 in ParentClass1
                      # This is method 1 in ParentClass2