new_contents: """
  Handler for Cisco Nexus device specific information.
  
  Note that for proper import, the classname has to be:
  
      "<Devicename>DeviceHandler"
  
  ...where <Devicename> is something like "Default", "Huawei", etc.
  
  All device-specific handlers derive from the DefaultDeviceHandler, which implements the
  generic information needed for interaction with a Netconf server.
  
  """
  
  from ncclient.xml_ import BASE_NS_1_0
  
  from .default import DefaultDeviceHandler
  
  class HuaweiDeviceHandler(DefaultDeviceHandler):
      """
      Huawei handler for device specific information.
  
      In the device_params dictionary, which is passed to __init__, you can specify
      the parameter "ssh_subsystem_name". That allows you to configure the preferred
      SSH subsystem name that should be tried on your Nexus switch. If connecting with
      that name fails, or you didn't specify that name, the other known subsystem names
      will be tried. However, if you specify it then this name will be tried first.
  
      """
      _EXEMPT_ERRORS = []
  
      def __init__(self, device_params):
          super(HuaweiDeviceHandler, self).__init__(device_params)
  
      def get_capabilities(self):
          # Just need to replace a single value in the default capabilities
          c = super(HuaweiDeviceHandler, self).get_capabilities()
          return c
  
      def get_xml_base_namespace_dict(self):
          return { "xmlns":BASE_NS_1_0 }
  
      def get_xml_extra_prefix_kwargs(self):
          d = {
                  # "xmlns":"http://www.huawei.com/netconf/vrp"
              }
          d.update(self.get_xml_base_namespace_dict())
          return d
  
  
  
subject: add device handler