[Twisted-Python] Help using XmlStreamFactory & XmlStream : XPathQuery error?

[Ralph Meijer]

On Tue, 2008-02-19 at 15:48 +0100, Gabriel Rossetti wrote:
> Christopher Zorn wrote:
> >
> >
> > On Feb 19, 2008 8:54 AM, Jean-Paul Calderone <exarkun at divmod.com 
> > <mailto:exarkun at divmod.com>> wrote:
> >
> >     On Tue, 19 Feb 2008 12:29:38 +0100, Gabriel Rossetti
> >     <mailing_lists at evotex.ch <mailto:mailing_lists at evotex.ch>> wrote:
> >     > [snip]
> >     >Ok, I've got some code sort of working, if I use the following
> >     XPathQuery
> >     >string : "/*" on the following XML string :
> >     >
> >     ><?xml version="1.0" encoding="utf-8"?>
> >     ><test><feed name="test">toto</feed></test>
> >     >
> >     >the addObserver works ( xs.addObserver("/*", self.onTest) )
> >     >but if I try the following :
> >     >
> >     >
> >     >xs.addObserver("/test/feed/@name", self.onTest)
> >     >or
> >     >xs.addObserver(xpath.XPathQuery("/test/feed/@name"), self.onTest)
> >     >
> >
> >     I don't think the xpath implementation in xish is complete.  You may
> >     have found a bug or a case it doesn't handle.
> >
> >
> > It is not complete. But if you would like to find the stanza 'feed' 
> > with the attribute 'name' then it would like like
> >
> > xs.addObserver("/test/feed[@name]", self.onTest)
> >
> >
> Ok, thanks (Jean-Paul & Christopher), that helped, I though I was doing 
> something wrong :-). So there is no way of directly getting the stanza's 
> attribute's value using the xpath implementation in xish? I can use the 
> getAttribute() method but "pure" xpath would be nicer.

See the other mail for a more complete answer to why the XPath
implementation is like it is.

Indeed the XPath implementation is far from complete. It shouldn't yield
that particular error though, I think. Could you file a ticket for this
specific case?

-- 
Groetjes,

ralphm