R: [Python-Dev] Deprecating string exceptions

[Martin v. Loewis]

Guido van Rossum <guido@python.org> writes:

> > >>> class Z(str,Exception):
> > ...  pass
> 
> Legal, but not particularly useful.  Anyway, I think that "derives
> from Exception" overrules "derives from str" here, so this should be
> allowed.  Note that currently it creates a new-style class and thus it
> doesn't work.

What do you mean, it doesn't work?

>>> class Z(str,Exception):pass
...
>>> exc = Z("Hallo")
>>> try:
...   raise exc
... except exc:
...   print "Gefangen"
...
Gefangen

Regards,
Martin