def _set_direction(self, v, load=False):
    """
    Setter method for direction, mapped from YANG variable /monitor/session/span_command/direction (enumeration)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_direction is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_direction() directly.
    """
    if hasattr(v, "_utype"):
      v = v._utype(v)
    try:
      t = YANGDynClass(v,base=RestrictedClassType(base_type=unicode,                                     restriction_type="dict_key",                                     restriction_arg={u'both': {'value': 2}, u'rx': {'value': 1}, u'tx': {'value': 0}},), is_leaf=True, yang_name="direction", rest_name="direction", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'Mirror Direction:Ingress or Egress or Both', u'cli-full-command': None, u'display-when': u"((../dest-ethernet = 'ethernet') or\n(../dest-ethernet = 'rspan-vlan') or \n(../dest-ethernet = 'port-channel'))", u'cli-full-no': None}}, namespace='urn:brocade.com:mgmt:brocade-span', defining_module='brocade-span', yang_type='enumeration', is_config=True)
    except (TypeError, ValueError):
      raise ValueError({
          'error-string': """direction must be of a type compatible with enumeration""",
          'defined-type': "brocade-span:enumeration",
          'generated-type': """YANGDynClass(base=RestrictedClassType(base_type=unicode,                                     restriction_type="dict_key",                                     restriction_arg={u'both': {'value': 2}, u'rx': {'value': 1}, u'tx': {'value': 0}},), is_leaf=True, yang_name="direction", rest_name="direction", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'Mirror Direction:Ingress or Egress or Both', u'cli-full-command': None, u'display-when': u"((../dest-ethernet = 'ethernet') or\n(../dest-ethernet = 'rspan-vlan') or \n(../dest-ethernet = 'port-channel'))", u'cli-full-no': None}}, namespace='urn:brocade.com:mgmt:brocade-span', defining_module='brocade-span', yang_type='enumeration', is_config=True)""",
        })

    self.__direction = t
    if hasattr(self, '_set'):
      self._set()
Setter method for direction, mapped from YANG variable /monitor/session/span_command/direction (enumeration)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_direction is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_direction() directly.