Prints the pom version

pom_version.py

#!/usr/bin/env python

import sys
import xml.etree.ElementTree as ET

for arg in sys.argv[1:]:
  elements = ET.parse(arg).findall("./pom:version", {'pom': 'http://maven.apache.org/POM/4.0.0'})
  if len(elements) == 1:
    print elements[0].text
  elif len(elements) == 0:
    raise Exception('no version found')
  else:
    raise Exception('more than one version found')