On 2008-11-11 15:07, Barry Warsaw wrote: > On Nov 11, 2008, at 8:54 AM, M.-A. Lemburg wrote: > >> On 2008-11-11 14:28, Antoine Pitrou wrote: >>> M.-A. Lemburg <mal <at> egenix.com> writes: >>>> Why was the special case for None being "smaller" than all other >>>> objects in Python removed from Python 3.0 ? (see object.c in Py2.x) >>> >>> Because ordered comparisons (<, <=, >, >=) are much stricter in 3.0 >>> than in 2.x. >>> In practice, ordered comparisons which don't have an obvious, >>> intuitive meaning >>> now raise a TypeError (such as comparing a number and a string). > >> That's fine. I'm just talking about the special case for None that >> has existed in Python for years - and for a good reason. > > How hard is it to implement your own "missing" object which has the > desired semantics? Why should something as fundamental as None have it?
Because None is already special, has had this feature for a very long time and there's no apparent reason to move the feature to some other special object. Also, having each module or project invent its own NULL-like object will not make things better for anyone, it would only introduce new problems. I don't see any benefit from the removal of the special property of None in Python 3.0. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Nov 11 2008) >>> Python/Zope Consulting and Support ... http://www.egenix.com/ >>> mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/ >>> mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/ ________________________________________________________________________ :::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! :::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 _______________________________________________ Python-3000 mailing list Python-3000@python.org http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
