[Python-Dev] 'hasattr' is broken by design (original) (raw)
R. David Murray rdmurray at bitdance.com
Tue Aug 24 16:57:20 CEST 2010
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On Tue, 24 Aug 2010 09:26:09 -0500, Benjamin Peterson <benjamin at python.org> wrote:
2010/8/24 P.J. Eby <pje at telecommunity.com>: > At 03:37 PM 8/24/2010 +0200, Hrvoje Niksic wrote: >> >> a) a "business" case of throwing anything other than AttributeError from >> getattr and friends is almost certainly a bug waiting to happen, and > > FYI, best practice for getattr is generally to bail with an > AttributeError as soon as you see double underscores in the name, unless you > intend to support special attributes.
Unless you're in an old-style class, you shouldn't get an double underscore methods in getattr (or getattribute). If you do, it's a bug.
Benjamin, I remember you fixing various special method lookups, so just for clarity's sake, which versions of Python does your statement apply to?
-- R. David Murray www.bitdance.com
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