I haven't heard anything back. Since I've been able to test programs that depend on the libxml2 C library independent of the libxml2 Python binding, I'm pretty certain the fault lies in the binding itself. Is this a known issue with the binding? It is kind of a legacy thing, as I understand, at this point. I can produce a simpler working example, if need be, to show this is difficulty. Is there a known working example I can plug in to determine things are definitely wrong on my side?
-A Sent from my Planet > > I'm thinking it should look something like this, assuming Python language: > > Import xmlsec > Import libxml2 > > ... > > def test_get_xml_fragment(self,xpath,ns): > ret = None > context = self.doc.xpathNewContext() > if ns is None: > > context.xpathRegisterNs(ns,'http://127.0.0.1/#no_place_like_home') > res = context.xpathEval(xpath) > i = 0 > for node in res: > print i,':',node > i = i + 1 > > > Please note there is an object in the mix, and I can get the whole to work > great without namespaces. One good example of how Python should be handling > namespaces in this case would be great. Even telling me it's forever > broken...this too would be good to know. (Also, this is not an ideal > example...I get this. I want something that hobbles before I get something > hat soars.) > > Thanks in advance. > > Sent from my Planet >> >> Message: 2 >> Date: Fri, 30 Jan 2015 09:03:40 -0600 >> From: Ross Reedstrom <reeds...@rice.edu> >> To: xml@gnome.org >> Subject: Re: [xml] Xpath issues with libxml2 >> Message-ID: <20150130150340.ga28...@rice.edu> >> Content-Type: text/plain; charset=us-ascii >> >> Alex - >> With out examples of what you've tried, it's hard to diagnose the problem. >> However, seeing 'namespaces' and 'never returns anything' makes me think >> you're >> having issues with the default namespace concept. While XML documents have a >> default namespace, XPaths do not. Once you use namespaces in an xml document, >> all your xpaths will need to use namespace declarations for all the path >> parts, >> even for tags that are defaulted in the document. So, you'll need to declare >> a namespace prefix that matches the default namespace in the doc. Give us >> a small example that you've tried that doesn't work, we'll fix it. >> >> Ross >> >>> On Fri, Jan 30, 2015 at 08:44:15AM -0500, Alex Boese wrote: >>> Forgive me if this is a deprecated approach (as I am not fully aware), but >>> I was utilizing "default" libxml2 bindings (not lxml) in Python to retrieve >>> xml fragments via xpath functions. Normally this seems to work fine, but >>> with namespace declarations this seems especially problematic as nothing >>> ever returns and nothing errors. Would it be possible to confirm what >>> correct functions and order of operations would be for this? Even if the >>> example is C, I can translate that to Python. >> >> -- >> Ross Reedstrom, Ph.D. reeds...@rice.edu >> Systems Engineer & Admin, Research Scientist phone: 713-348-6166 >> Connexions http://cnx.org fax: 713-348-3665 >> Rice University MS-375, Houston, TX 77005 >> GPG Key fingerprint = F023 82C8 9B0E 2CC6 0D8E F888 D3AE 810E 88F0 BEDE >> >> >> ------------------------------ >> >> Subject: Digest Footer >> >> _______________________________________________ >> xml mailing list >> xml@gnome.org >> https://mail.gnome.org/mailman/listinfo/xml >> >> >> ------------------------------ >> >> End of xml Digest, Vol 128, Issue 2 >> *********************************** > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <https://mail.gnome.org/archives/xml/attachments/20150210/13669f43/attachment.html> > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > xml mailing list > xml@gnome.org > https://mail.gnome.org/mailman/listinfo/xml > > > ------------------------------ > > End of xml Digest, Vol 129, Issue 1 > *********************************** _______________________________________________ xml mailing list, project page http://xmlsoft.org/ xml@gnome.org https://mail.gnome.org/mailman/listinfo/xml
