[Python-Dev] xml.etree.ElementTree.IncrementalParser (was: ElementTree iterparse string)
solipsis at pitrou.net
Thu Aug 8 10:20:39 CEST 2013
Le Thu, 08 Aug 2013 06:33:42 +0200,
Stefan Behnel <stefan_ml at behnel.de> a écrit :
> [from python-ideas]
> Antoine Pitrou, 07.08.2013 08:04:
> > Take a look at IncrementalParser:
> > http://docs.python.org/dev/library/xml.etree.elementtree.html#incremental-parsing
> Hmm, that seems to be a somewhat recent addition (April 2013). I
> would have preferred hearing about it before it got added.
> I don't like the fact that it adds a second interface to iterparse()
> that allows injecting arbitrary content into the parser.
> You can now
> run iterparse() to read from a file, and at an arbitrary iteration
> position, send it a byte string to parse from, before it goes reading
> more data from the file. Or take out some events before iteration
> I think the implementation should be changed to make iterparse()
> return something that wraps an IncrementalParser, not something that
> is an IncrementalParser.
That sounds reasonable. Do you want to post a patch? :-)
> Also, IMO it should mimic the interface of the TreeBuilder, which
> calls the data reception method "data()" and the termination method
> "close()". There is no reason to add yet another set of methods names
> just to do what others do already.
Well, the difference here is that after calling eof_received() you can
still (and should) call events() once to get the last events. I think
it would be weird if you could still do something useful with the object
after calling close().
Also, the method names are not invented, they mimick the PEP 3156
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