code: def vcs_nodes(self):
          
          urn = "{urn:brocade.com:mgmt:brocade-vcs}"
          namespace = 'urn:brocade.com:mgmt:brocade-vcs'
          show_vcs = ET.Element('show-vcs', xmlns=namespace)
          results = self._callback(show_vcs, handler='get')
          result = []
          for nodes in results.findall('%svcs-nodes' % urn):
              for item in nodes.findall('%svcs-node-info' % urn):
                  serial_number = item.find('%snode-serial-num' % urn).text
                  node_status = item.find('%snode-status' % urn).text
                  vcs_id = item.find('%snode-vcs-id' % urn).text
                  rbridge_id = item.find('%snode-rbridge-id' % urn).text
                  switch_mac = item.find('%snode-switch-mac' % urn).text
                  switch_wwn = item.find('%snode-switch-wwn' % urn).text
                  switch_name = item.find('%snode-switchname' % urn).text
                  node_is_principal = item.find('%snode-is-principal' % urn).text
                  switch_ip = ''
                  for switch_ip_addr in item.findall(
                          '%snode-public-ip-addresses' % urn):
                      switch_ip = switch_ip_addr.find(
                          '%snode-public-ip-address' % urn).text
                      break
                  item_results = {'node-serial-num': serial_number,
                                  'node-status': node_status,
                                  'node-vcs-id': vcs_id,
                                  'node-rbridge-id': rbridge_id,
                                  'node-switch-mac': switch_mac,
                                  'node-switch-wwn': switch_wwn,
                                  'node-switch-ip': switch_ip,
                                  'node-switchname': switch_name,
                                  'node-is-principal': node_is_principal}
  
                  result.append(item_results)
  
          return result
docs: dict: vcs node details