Guido van Rossum <guido@python.org> writes:
Paul Prescod <paul@prescod.net> writes:
Should it be arbitrary objects or just subclasses of exception: "It is recommended that user-defined exceptions in new code be derived from Exception, although for backward compatibility reasons, this is not required. Eventually this rule will be tightened."
[Martin]
If that is the rule, the bug report can be closed as "not-a-bug".
I seem to have a particularly dense day. :-(
What does "that" (in "If that is the rule") refer back to?
"user-defined exceptions be derived from Exception". It is only a recommendation in the sense that you can use arbitrary classic classes. If the rule is eventually tightened, it is ok if new-style classes are not allowed as exceptions right now. An action is only needed if you pronounce that it is desirable to allow new-style classes as exceptions - which would necessarily have a base class that is not derived from Exception. Regards, Martin