code: def _find_value(content, ns, key):
      
      doc = ElementTree.fromstring(content)
      query = './/{%(ns)s}%(item)s' % {'ns': ns, 'item': key}
      rv = doc.find(query)
      return rv.text
docs: Find the return value in a CIM response.
  
      The xmlns is needed because everything in CIM is a million levels
      of namespace indirection.