-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Guido van Rossum wrote: > On Mon, Aug 23, 2010 at 7:46 AM, Benjamin Peterson <benja...@python.org> > wrote: >> 2010/8/23 Yury Selivanov <yseliva...@gmail.com>: >>> 1) I propose to change 'hasattr' behaviour in Python 3, making it to >>> swallow only AttributeError exceptions (exactly like 'getattr'). Probably, >>> Python 3.2 release is our last chance. >> I would be in support of that. > > I am cautiously in favor. The existing behavior is definitely a > mistake and a trap. But it has been depended on for almost 20 years > now. > > I recommend that you create a patch, apply it, run the *entire* stdlib > test suite and see how much breaks. That will give you an idea of the > damage to expect for 3rd party code.
Robust third-party code is written to avoid 'hasattr', for precisely this reason. Third-party code which relies on 'hasattr' to mask non-AttributeErrors is broken alreay (it just doesn't show the borkedness). Tres. - -- =================================================================== Tres Seaver +1 540-429-0999 tsea...@palladion.com Palladion Software "Excellence by Design" http://palladion.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkxymr0ACgkQ+gerLs4ltQ4rQwCgyHJmqt2TefCgX2di5aJ92pVh 26YAnjKrBrK3gMs7ddo2wHtpT+iq2Mbg =BFxu -----END PGP SIGNATURE----- _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
