Counting entire xml file rather than just selected elements

i am trying to use elementtree to count some elements in an XML file. here is the structure of the XML:

<server>
 <client>
  <content>
   <files>
    <index name/>
    <index name/>
    <index name/>
   </files>
  </content>
 </client>
</server>
<server>
 <client>
  <content>
   <files>
    <index name/>
    <index name/>
    <index name/>
   </files>
  </content>
 </client>
</server>

So what i want to do is count the index elements. the issue i am having is i need to look at counting the amount of index elements within each files container.

when i search for index it counts the entire xml file rather than the just the ones within the files tag.

Here's my code:

tree = ET.parse(filepath)
root = tree.getroot()

test = 0
for i in root.iter('files'):
    for i in root.iter('index'):
        test += 1
    print test

I'd appreciate any help.

I'm running python 2.7.8 just FYI like