isinstance() and issubclass() return conflicting results

Question

>>> class Hello:
    pass

and

>>> isinstance(Hello,object)
True
>>> issubclass(Hello,object)
False
>         


        

Answer 1

It's because you are using old-style classes so it doesn't derive from object. Try this instead:

class Hello(object):
    pass

>>> issubclass(Hello,object)
True

Old-style classes are deprecated and you shouldn't use them any more.

In Python 3.x all classes are new-style and writing (object) is no longer required.