Barry Warsaw wrote: > On Sat, 2006-03-18 at 22:53 +1000, Nick Coghlan wrote: >> Should GeneratorExit inherit from Exception or BaseException? > > Actually, this prompts me to write about an issue I have with PEP 352. > I actually don't think it's necessary (yes, I know it's already in the > tree). > > What I would much rather is is for StandardError to be renamed Error, > for Exception to remain the base class of the exception hierarchy, and > for KeyboardInterrupt to be moved to inherit directly from Exception. > GeneratorExit, SystemExit, and StopIteration would continue to inherit > from Exception. > > The reasoning is this: anything that can be raised is an Exception. Not > all Exceptions are Errors. Anything that signals an error condition is > an Error, and anything that signals a warning condition is a Warning. > Thus the basic hierarchy /ought/ to be: > > Exception > +- KeyboardInterrupt > +- GeneratorExit > +- SystemExit > +- StopIteration > +- Error > | +- ImportError > | +- (etc.) > | > +- Warning > +- UserWarning > +- (etc.)
Cool! That's so far the clearest solution. An additional bonus is that except statements look nicer: except: # still catches all Exceptions, just like except Exception: except Error: # is what you normally should do Cheers, Georg _______________________________________________ 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
