[Python-Dev] minidom -> new-style classes? (original) (raw)
Guido van Rossum guido at python.org
Wed Apr 18 05:40:00 CEST 2007
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Perhaps a rewrite could target 3.0 and 2.6 could use a backported version of this if py3k compatibility mode is enabled? I'd love to see at least the 3.0 version cleaned up.
--Guido
On 4/17/07, Fred L. Drake, Jr. <fdrake at acm.org> wrote:
On Tuesday 17 April 2007 22:37, Jason Orendorff wrote: > The right way to implement these quirks is using new-style classes and > properties. Right now minidom uses old-style classes and lots of > hackery, and it's pretty broken. (Another example--there is an > Attr.setprefix method, but it is not called from setattr.)
Yes, it's truly vile. Better than it used to be, but.... There's also some vague attempt at supporting the Python CORBA IDL mapping, since the W3C DOM specifications use that. I expect the support is incomplete at best. > Surely nobody is subclassing these classes. You don't subclass DOM > interfaces--the DOM doesn't work that way. So this change should be > OK. Right? There are people who've tried building new DOM implementations by subclassing the minidom classes to get most of the behavior. I'm don't know the status of any of these implementations, but changes to these classes have proved difficult due to this and the possibility of breaking pickles (amazed me, that one did!). I'd love to see a sane implementation, using new-style classes and properties, but as long as we've got to support existing applications, we're pretty well hosed as far as xml.dom.minidom is concerned. A new DOM implementation conforming to the W3C recommendations would be nice, but I'd really rather see an XML object model that doesn't suck, but that supports as much of the information found in the W3C DOM as possible. Something based more on the ElementTree API, perhaps. The value of the W3C-approved API has certainly turned out to be more decoy than anything.
-Fred -- Fred L. Drake, Jr.
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-- --Guido van Rossum (home page: http://www.python.org/~guido/)
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