Re: [xml] help! python wrapper for the xslt loader API

[Daniel Veillard <veillard redhat com>]

On Wed, Sep 06, 2006 at 01:38:06AM +0100, Nic James Ferrier wrote:
> I've knocked up a patch for python wrapping the xslt loader API. 
> 
> My patch facilitates writing loaders in python.
> 
> But I'm having problems getting the xmlDocPtr back from a python
> function.
[...]
> When I do this I don't seem to get a valid doc.
> 
> The python I'm using is:
> 
>  def fn(url, ctx):
>     try:
>         # print url
>         ctxt = libxml2.parserCtxt(_obj=ctx)
>         doc = ctxt.ctxtReadDoc("""<?xml version='1.0'?><b/>""", url, "UTF-8", 0)
>         return doc

  The C object wrapper is in doc._o, maybe you don't want to have the function
return it, in that case at the C level you may have to grab the _o 
>     except Exception, e:
>         print >>sys.stderr, "something went wrong:", e
>         return None
> 
> The return value of ctxtReadDoc is a PyCObject wrapped xmlDocPtr so I
> presumed that I'd just be able to access it with PyxmlNode_Get. But as
> I say... this is not so.

  I think there is one more layer :-) sorry for the complexity ...

> 
> Anybody know what mantra I need to get at the doc object returned from
> python in this instance?

  lookup the _o, see libxml2.py especially the xmlDoc constructor.

Daniel

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