1、继承关系
# -*- coding: utf-8 -*-
class Animal(object):
pass
class Cat(Animal):
pass
class Dog(Animal):
pass
cat = Cat()
2、子类判断
issubclass(x, A_tuple)
print(issubclass(Cat, Animal)) # True
print(issubclass(Cat, Dog)) # False
# 两种方式等价
print(issubclass(Cat, (Animal, Dog))) # True
print(issubclass(Cat, Animal) or issubclass(Cat, Dog)) # True
3、实例判断
isinstance(x, A_tuple)
print(isinstance(cat, Animal)) # True
print(isinstance(cat, Cat)) # True
print(isinstance(cat, Dog)) # False
# 两种方式等价
print(isinstance(cat, (Cat, Dog))) # True
print(isinstance(cat, Cat) or isinstance(cat, Dog)) # True