type() new style class instance says "class", not "ObjectType"

[Guido van Rossum]

"David Mertz, Ph.D." wrote:
> Unfortunately, there's more to it than this.  There still is--and
> presumably always will be--a difference between "instances" and other
> types of things.  For example, a list is a mutable sequence that has
> some items in it.  In contrast, an instance object--whether new style or
> old style (and w/ or w/o __slots__)--is a thing that has some
> attributes.  The basic shape of the data will always be different.  The
> type/class unification doesn't change that.

Hm...

So after

    class C(list):
        def appendmany(self, *args):
            for arg in args:
                self.append(arg)

Do you consider a C instance to be a list or an instance?
You might look at the presence of a __dict__ attribute
storing instance attributes as the distinguishing factor.
But then what would you do after

    class D(list):
        __slots__ = ["foo"]

List or instance?  The shape of a D instance is the same
as the shape of a list, but with an extra slot added.

--Guido van Rossum (home page: http://www.python.org/~guido/)