class SuperList(list):
    def __len__(self):
        return 1000


super_list1 = SuperList()

print(len(super_list1))  # 1000
super_list1.append(5)
print(super_list1[0])  # 5
print(issubclass(SuperList, list))  # True
print(issubclass(list, object))  # True
