code: def _return_value(content, ns):
      
      doc = ElementTree.fromstring(content)
      query = './/{%(ns)s}%(item)s' % {'ns': ns, 'item': 'ReturnValue'}
      rv = doc.find(query)
      return int(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.