code: def alterar(
              self,
              id_interface,
              nome,
              protegida,
              descricao,
              id_ligacao_front,
              id_ligacao_back,
              tipo=None,
              vlan=None):
          
          if not is_valid_int_param(id_interface):
              raise InvalidParameterError(
                  u'Interface id is invalid or was not informed.')
  
          url = 'interface/' + str(id_interface) + '/'
  
          interface_map = dict()
          interface_map['nome'] = nome
          interface_map['protegida'] = protegida
          interface_map['descricao'] = descricao
          interface_map['id_ligacao_front'] = id_ligacao_front
          interface_map['id_ligacao_back'] = id_ligacao_back
          interface_map['tipo'] = tipo
          interface_map['vlan'] = vlan
  
          code, xml = self.submit({'interface': interface_map}, 'PUT', url)
  
          return self.response(code, xml)
docs: Edit an interface by its identifier.
  
          Equipment identifier is not changed.
  
          :param nome: Interface name.
          :param protegida: Indication of protected ('0' or '1').
          :param descricao: Interface description.
          :param id_ligacao_front: Front end link interface identifier.
          :param id_ligacao_back: Back end link interface identifier.
          :param id_interface: Interface identifier.
  
          :return: None
  
          :raise InvalidParameterError: The parameters interface id, nome and protegida are none or invalid.
          :raise NomeInterfaceDuplicadoParaEquipamentoError: There is already an interface with this name for this equipment.
          :raise InterfaceNaoExisteError: Front link interface and/or back link interface doesn't exist.
          :raise DataBaseError: Networkapi failed to access the database.
          :raise XMLError: Networkapi failed to generate the XML response.