[Python-Dev] HTMLParser and HTML5 (original) (raw)

Brett Cannon brett at python.org
Fri Jul 29 22:34:13 CEST 2011

On Fri, Jul 29, 2011 at 13:16, Glyph Lefkowitz <glyph at twistedmatrix.com>wrote:

On Jul 29, 2011, at 3:00 PM, Matt wrote:

I don't see any real reason to drop a decent piece of code (HTMLParser, that is) in favor of a third party library when only relatively minor updates are needed to bring it up to speed with the latest spec.

I am not really one to throw stones here, as Twisted contains a lenient pseudo-XML parser which I still maintain - one which decidedly does not agree with html5's requirements for dealing with invalid data, but just a bunch of ad-hoc guesses of my own. My impression of HTML5 is that HTMLParser would require significant modifications and possibly a drastic re-architecture in order to really do HTML5 "right"; especially the parts that the html5lib authors claim makes HTML5 streaming-unfriendly, i.e. subtree reordering when encountering certain types of invalid data.

We could also have the code live side-by-side for a while (or indefinitely if that was really desired) by bringing html5lib in as either a separate module or having the relevant classes live in htmllib under different names.

But all of this is just hypothetical until someone decides to do the legwork to actually make a proposal and get the coding done.

-Brett

But if I'm wrong about that, and there are just a few spec updates and bugfixes that need to be applied, by all means, ignore my comment. -glyph

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