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   Python/XML parsing

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Hi, I am a beginner in XML and Python as well and I am trying to learn as 
much as possible by writing some examples myself. I created a very simple 
xml file with just one element.  Then I loaded the file into the DOM tree 
using the 4DOM parser. Once the it was loaded, I appended a couple of child 
elements to the root. This was all fine, but when I went back to the xml 
file nothing was updated. Isn't the xml file supposed to be updated 
automatically from the DOM tree? If not, what I do have to do to see the 

Donald Traboini

This is the python script
import sys
from xml.dom.ext.reader import Sax2

# create Reader object
reader = Sax2.Reader()

# parse the document
doc = reader.fromStream(someFileName.xml)

new = document.createElement('chapter')
new.setAttribute('number', '5')

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