Re: [xml] Building a DOM tree in python using libxml2

["William M. Brack" <wbrack mmm com hk>]

William M. Brack said:
> Colin Fox said:
> > It'd be nice actually if _obj was None that the appropriate
> > library
> > call
> > got made to manufacture it.
> >
> > cf
>
> I'm not quite convinced of that - and I'm not certain, but it looks
> as if you have a small misunderstanding of the Python bindings.  As
> mentioned in the docs http://xmlsoft.org/python.html, "most of the
> bindings are automatically generated, and the xml prefix is removed
> and the casing convention are kept".  In other words, libxml2.xmlDoc
> is *not* the proper way to create a document, and libxml2.xmlNode is
> *not* for creating a node in the tree.  They are, in fact, *classes*
> to implement the various methods (the proper methods are
> libxml2.newDoc and the newChild method of the resulting document
> object, as mentioned in John Fleck's email).
>
> I'm still looking at how to cleanly check what object the user
> provides (in order to prevent a segfault), but I work slowly when a
> lot of stuff I never knew about before is involved :-).
>
> Bill

After further discussion with Daniel (off-list), it was agreed that
the "manufacturing" of such items would be useful.  I'm afraid that
might take me even longer to implement - in the meantime, I have put
in a (temporary?) check to make the code complain if an incorrect
usage (such as your original posting) is attempted.  That change is
in CVS, and hopefully this will prevent the segfault.

Bill