How to define what a class is ?

Gregory Ewing greg.ewing at
Wed Feb 24 15:44:33 EST 2016

Ian Kelly wrote:

> All metaclasses are subclasses of type, so all classes are instances of type.

I think that's about the most general definition you
can find. Almost everything else that you might think
of as being part of the classness of a class can be

Another definition might be that it's something that
is potentially the result of type(x) for some x.
I think that's equivalent, because at the C level
type(x) returns the value of x->ob_type, which
always points to an instance of type or a subclass


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