Amaury, I am aware of what `issubclass` does and what `isinstance` does. I am not manually feeding `[]` into `issubclass`. I have an object which can be either a list, or a string, or a callable, or a type. And I want to check whether it's a sub-class of some base class.

So I don't think I should be taking extra precautions before using `issubclass`: If my object is not a subclass of the given base class, I should just get `False`.