Steven D'Aprano <steve+comp.lang.pyt...@pearwood.info>: > Python identity is represented by an integer, and it is guaranteed to > be unique and constant for the lifetime of the object. It may or may > not be reused once the object no longer exists. That's all you need to > know about identity; that's *all there is to know* about identity in > Python. > > [...] > > They are not metaphysical. They are concrete. You cannot understand the > semantics of identity in Python without understanding Python's execution > model.
That's circular reasoning. When you are defining Python's execution model, you can't refer back to Python's execution model. For a good example of what I'm after, take a look how Java specifies its crucial happens-before relation: <URL: http://docs.oracle.com/javase/specs/jls/se7/html/jls-17.html#jls-17.4.5> Marko -- https://mail.python.org/mailman/listinfo/python-list
