R: [Python-Dev] Deprecating string exceptions

[Barry A. Warsaw]

>>>>> "MvL" == Martin v Loewis <martin@v.loewis.de> writes:

    MvL> Also, I believe that using your class Z as an exception class
    MvL> should not be supported: a "proper" exception should not just
    MvL> merely inherit from Exception - it should have Exception as
    MvL> its only root class (Z has both object and Exception as root
    MvL> classes).

Can you explain why you think the rule should be so strict?  I don't
see a problem with using multiple inheritance to satisfy the "must
derive" rule.

-Barry