Nick Maclaren schrieb: > So distinguishing -0.0 from 0.0 isn't really in Python's current > semantics at all. And, for reasons that we could go into, I assert > that it should not be - which is NOT the same as not supporting > branch cuts in cmath.
Are you talking about "Python the language specification" or "Python the implementation" here? It is not a change to the language specification, as this aspect of the behavior (as you point out) is unspecified. However, it is certainly a change to the observable behavior of the Python implementation, and no amount of arguing can change that. Regards, Martin P.S. For that matter, *any* kind of changes to the singleton nature of certain immutable values is a change in semantics. It's just that dropping -0.0 is an *additional* change (on top of the change that "1.0-1.0 is 0.0" would change from False to True). _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
