Python Modul, which provides a trivial routine for converting router output to etree object, without namespaces
sl@M320-TEST-re0> show version | display xml | no-more
<rpc-reply xmlns:junos="http://xml.juniper.net/junos/13.3R5/junos">
<software-information>
<host-name>M320-TEST-re0</host-name>
<product-model>m320</product-model>
<product-name>m320</product-name>
<junos-version>13.3R5.9</junos-version>
</software-information>
<cli>
<banner>{master}</banner>
</cli>
</rpc-reply>
{master}
sl@M320-TEST-re0>
from juniperXmlParser import parse
tree = parse(cliXmlString)
print (tree.xpath ('//rpc-reply/software-information/junos-version')[0].text)
output:
13.3R5.9