fwiw, we're working on doing this in plone land, utilizing the non
standard, fast, incremental, validating XmlReader interface from libxml
and pluggable namespace handlers. the xmlreader iface is very SAX like.
http://svn.plone.org/view/archetypes/Marshall/branches/k_vertigo-pluggable-ns/
-k
On Wed, 07 Dec 2005 06:33:46 -0800, Jean-Marc Orliaguet
<[EMAIL PROTECTED]> wrote:
Martijn Faassen wrote:
Andreas Jung wrote:
I'm about to write an xml importer for importing simple data
(properties,
dictionaries). Exporting is easy, importing is trickier because a
parser
is required.
Is there any prefered framework for doing such things in zope3
(zope2)?
Sax or DOM...it depends on the usecase and the algorithmic approach
you take. Sax is fast but you have to build your own datastructures,
DOM is slow, takes a lot of memory but it gives you a tree to perform
any fancy operation on it..
DOM is also not particularly Pythonic (neither is SAX, but it is
relatively simple at least). You could also look into ElementTree (or
lxml, which implements that API too). ElementTree (though not yet lxml)
also introduces iterparse, which is a kind of streaming version of the
ElementTree API.
ElementTree's API is a much nicer way to work with XML from Python than
DOM. Also it's more lightweight than even MiniDOM.
Regards,
Martijn
thanks for the info Martijn, I'm going to look at it.
I've done some work with ElementTree for CPSIO, and I haven't found it
very easy to use because of all the extra namespace URI, and xpath stuff
used for the tree navigation (xpath_findall, ..) which seem to get in
the way. Also it could be that I find the DOM approach easier since I'm
used to it in javascript already.
the question is also about being able to reuse parts of the
export/import code of CMFSetup / GenericSetup and possibly simplify the
zope2 -> zope3 migration of existing applications.
best
/JM
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