def _set_type(self, v, load=False):
    """
    Setter method for type, mapped from YANG variable /rbridge_id/threshold_monitor/interface/policy/area/type (enumeration)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_type is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_type() directly.
    """
    parent = getattr(self, "_parent", None)
    if parent is not None and load is False:
      raise AttributeError("Cannot set keys directly when" +
                             " within an instantiated list")

    if hasattr(v, "_utype"):
      v = v._utype(v)
    try:
      t = YANGDynClass(v,base=RestrictedClassType(base_type=unicode,                                     restriction_type="dict_key",                                     restriction_arg={u'Ethernet': {'value': 0}},), is_leaf=True, yang_name="type", rest_name="type", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'Interface types that can be configured independent of speed', u'cli-expose-key-name': None}}, is_keyval=True, namespace='urn:brocade.com:mgmt:brocade-threshold-monitor', defining_module='brocade-threshold-monitor', yang_type='enumeration', is_config=True)
    except (TypeError, ValueError):
      raise ValueError({
          'error-string': """type must be of a type compatible with enumeration""",
          'defined-type': "brocade-threshold-monitor:enumeration",
          'generated-type': """YANGDynClass(base=RestrictedClassType(base_type=unicode,                                     restriction_type="dict_key",                                     restriction_arg={u'Ethernet': {'value': 0}},), is_leaf=True, yang_name="type", rest_name="type", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'Interface types that can be configured independent of speed', u'cli-expose-key-name': None}}, is_keyval=True, namespace='urn:brocade.com:mgmt:brocade-threshold-monitor', defining_module='brocade-threshold-monitor', yang_type='enumeration', is_config=True)""",
        })

    self.__type = t
    if hasattr(self, '_set'):
      self._set()