At 12:54 PM 6/9/03 -0600, Steven Taschuk wrote:
Quoth Raymond Hettinger: [...]
Except for conceptual purity, is there any real payoff in terms of performance or capability that would warrant a wholesale revision of working code?
There's also the question (mentioned in the PEP, albeit parenthetically) of how implicit instantiation could work with any future plan to allow new-style exceptions.
isinstance(ob,Exception) issubclass(cls,Exception) That is, a new-style exception would have to be an instance or subclass of Exception. The *real* thing that's broken is the check to see if an exception is a tuple! isinstance(ob,Exception) should be checked first. I guess I'm missing why this wouldn't work for new-style exceptions, provided they are required to subclass Exception (which I thought everything was going to be required to do eventually).