On Wed, Feb 24, 2016 at 1:08 AM, ast <nom...@invalid.com> wrote: > Hi > > Since a class is an object, I ask myself how to define rigorously what a > class is. > > classes are instances from type, but not all, since > a class may be an instance of a metaclass
All metaclasses are subclasses of type, so all classes are instances of type. > A class is always callable It doesn't strictly have to be. You could override the __call__ method in the metaclass to raise a TypeError if you don't want the class to be callable. I don't know of a use case for this, though. > Suppose I provide to you an object and that I > ask to you to tell me if it is a class or not. How > would you proceed ? import inspect inspect.isclass(x) -- https://mail.python.org/mailman/listinfo/python-list
