Initializing a DOM in Python
There are many DOM options in Python, and I have trouble remembering how to load a document into the various DOMs. Here are a few common ones, although there are many variations on them (loading from URL or string, different configurations, etc.). This should provide a starting point.
# Examples for reading in various DOMs from an XML file
# MiniDOM
def parseMinidom(filename):
   try:
       from xml.dom.minidom import parse
       doc = parse(filename)
       return doc
   except Exception, e:
       return 'parseMinidom() failed with exception %s' % e
# 4DOM
def parse4Dom(filename):
   try:
       from xml.dom.ext.reader.Sax2 import Reader
       f = file(filename)
       reader = Reader(validate=0, keepAllWs=0, catName=None)
       doc = reader.fromStream(f) # slow!
       f.close()
       return doc
   except Exception, e:
       return 'parse4Dom() failed with exception %s' % e
# Domlette
def parseDomlette(filename):
   try:
       from Ft.Xml.Domlette import NonvalidatingReader as reader
       f = file(filename)
       uri = 'file:///%s' % filename # suppress warning
       doc = reader.parseStream(f, uri)
       f.close()
       return doc
   except Exception, e:
       return 'parseDomlette() failed with exception %s' % e
# libXml
def parseLibXml(filename):
   try:
       import libxml2
       f = file(filename)
       data = f.read()
       f.close()
       doc = libxml2.parseDoc(data)
       return doc
   except Exception, e:
       return 'parseLibXml() failed with exception %s' % e
# pxDom
def parsePxDom(filename):
   try:
       import pxdom
       doc = pxdom.parse(filename)
       return doc
   except Exception, e:
       return 'parsePxDom() failed with exception %s' % e
def main():
   import sys
   filename = sys.argv[1]
   print '4DOM:', parse4Dom(filename)
   print 'Domlette:', parseDomlette(filename)
   print 'MiniDom:', parseMinidom(filename)
   print 'LibXml:', parseLibXml(filename)
   print 'PxDom:', parsePxDom(filename)
if __name__ == '__main__': main()
Tags: DOM Example Code Python Tutorial XML
[Permalink] Posted on 2004-09-15 by Dethe Elza
