iterate over a series of nodes in an XML file

[rajarshi.guha at gmail.com]

Stefan Behnel wrote:
> rajarshi.guha at gmail.com wrote:
> > I have an XML file which contains entries of the form:
> >
> > <idlist>
> >  <myID>1</myID>
> >  <myID>2</myID>
> > ....
> >  <myID>10000</myID>
> > </idlist>


Thanks to everybody for the pointers. ElementTree is what I ended up
using and my looks like this (based on the ElementTree tutorial code):

def extractIds(filename):
    f = open(filename,'r')
    context = ET.iterparse(f, events=('start','end'))
    context = iter(context)
    even, root = context.next()

    for event, elem in context:
        if event == 'end' and elem.tag == 'Id':
            yield elem.text
            root.clear()

As a result I can do:

for id in extractIds(someFileName):
  do something