processing xml with namespaces with python

dict.xml

<?xml version="1.0" encoding="UTF-8"?>
<hen:logs xmlns:hen="http://www.site.de/schemas/logs/1.0">
<!--<hen:vhost>
        <hen:uuid></hen:uuid>
 </hen:vhost>-->
	<hen:vhost>www.site1.de
		<hen:uuid>c5328180-e52b-4af5-bf6e-7a9e7c1754e2</hen:uuid>
	</hen:vhost>
	<hen:vhost>www.site2.de
		<hen:uuid>b7b968db-27c7-4430-8346-b2c6e2de8065</hen:uuid>
	</hen:vhost>
	<hen:vhost>www.site3.de
		<hen:uuid>243564bc-0f86-463a-9188-668ea6025edf</hen:uuid>
	</hen:vhost>
</hen:logs>

process.py

#!/usr/bin/env python
from lxml.etree import cElementTree

tree = lxml.etree.parse("dict.xml")
NS = '{http://www.site.de/schemas/logs/1.0}'
NS_vhost = tree.findall('//{NS}vhost'.format(NS=NS))
NS_uuid = tree.findall('//{NS}uuid'.format(NS=NS))

d = {}
for vhost in NS_vhost:
    d1 = vhost.text
    print d1

for uuid in NS_uuid:
    d2 = uuid.text
    print d2