Python: 学习系列之六：对象的内置函数

issubclass()与isinstance()

class ParentClass(object):
    pass


class ChildClass(ParentClass):
    pass


class ThirdClass(object):
    pass


# issubclass判断类对象与类对象的关系
print(issubclass(ChildClass, ParentClass))  # True
print(issubclass(ChildClass, (ParentClass, ThirdClass)))  # True，后面是个元组，只要满足元组内任意一个父类就为True

# isinstance判断实例对象与类对象的关系
c = ChildClass()
print(isinstance(c, ChildClass))  # True
print(isinstance(c, (ChildClass, ParentClass, ThirdClass)))  # True，后面是个元组，只要满足元组内任意一个类就为True

type()

print(type(c)) #<class '__main__.ChildClass'>,获取指定对象的类型
print(type(ChildClass)) #<class 'type'>， 类对象的类型是type