Quoth Guido van Rossum:
[...]
> Python usually doesn't care about isinstance relationships but cares
> about whether the needed protocol is implemented, and this suggests
> that requiring exceptions to subclass Exception is unPythonic.
This came up in python-list not long ago [1], and I raised (heh)
exactly that argument. Alex Martelli counterargued that
exceptions are one area in which we *do* usually care about
isinstance relationships, since that's how we specify which
exceptions to catch.
[1] http://mail.python.org/pipermail/python-list/2003-May/160965.html
--
Steven Taschuk staschuk@telusplanet.net
"I'm always serious, never more so than when I'm being flippant."
-- _Look to Windward_, Iain M. Banks
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