Dentro de sua _função de operação de caminho_, passe sua função de tarefa para o objeto _tarefas em segundo plano_ com o método `.add_task()`:

{* ../../docs_src/background_tasks/tutorial001.py hl[14] *}

`.add_task()` recebe como argumentos:

- Uma função de tarefa a ser executada em segundo plano (`write_notification`).
- Qualquer sequência de argumentos que deve ser passada para a função de tarefa na ordem (`email`).

## Metadados para tags

Você também pode adicionar metadados adicionais para as diferentes tags usadas para agrupar suas operações de rota com o parâmetro `openapi_tags`.

Ele recebe uma lista contendo um dicionário para cada tag.

Cada dicionário pode conter:

* `name` (**obrigatório**): uma `str` com o mesmo nome da tag que você usa no parâmetro `tags` nas suas *operações de rota* e `APIRouter`s.

     * when hasNext() was called.
     */
    private @Nullable E nextItem;

    /**
     * Index of element returned by most recent call to next. Reset to -1 if this element is deleted
     * by a call to remove.
     */
    private int lastRet;

    Itr() {
      lastRet = -1;
      if (count == 0) nextIndex = -1;
      else {

   *     time
   * @throws AssertionFailedError if the given method name does not match the name of the method
   *     this thread has called most recently
   */
  private Response getResponse(String methodName) throws Exception {
    Response response = responseQueue.poll(TIMEOUT_MILLIS, MILLISECONDS);
    if (response == null) {
      throw new TimeoutException();

   * {@code Future} is cancelled, it will attempt to cancel the other two, and if either of the
   * other two is cancelled, the returned {@code Future} will receive a callback in which it will
   * attempt to cancel itself.
   *
   * <p>This method is similar to {@link java.util.concurrent.CompletableFuture#thenCompose} and

	}
	fmt.Fprintf(os.Stderr, "%s:%d: %s", in.File(), in.Line(), fmt.Sprintln(args...))
	os.Exit(1)
}

// expectText is like Error but adds "got XXX" where XXX is a quoted representation of the most recent token.
func (in *Input) expectText(args ...interface{}) {
	in.Error(append(args, "; got", strconv.Quote(in.Stack.Text()))...)
}

// enabled reports whether the input is enabled by an ifdef, or is at the top level.

Our General Public Licenses are designed to make sure that you have the
freedom to distribute copies of free software (and charge for this
service if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs; and that you know you can do these things.

    bus.post(EVENT);
    List<String> expectedEvents = ImmutableList.of(EVENT);
    for (StringCatcher catcher : catchers) {
      assertEquals(
          "One of the registered catchers did not receive an event.",
          expectedEvents,
          catcher.getEvents());
    }
  }

  public void testToString() throws Exception {
    EventBus eventBus = new EventBus("a b ; - \" < > / \\ €");

        SmbWatchHandleImpl sut = new SmbWatchHandleImpl(handle, 0, false);

        CIFSException ex = assertThrows(CIFSException.class, sut::watch);
        assertTrue(ex.getMessage().contains("Did not receive response"));
    }

    // If the request is cancelled (NTSTATUS 0xC0000120), return null
    @Test
    @DisplayName("watch() returns null when request cancelled (NTSTATUS 0xC0000120)")

	}

	expiryWorker := func(wg *sync.WaitGroup, readyCh chan<- struct{}, taskCh <-chan expiryOp, gotExpired *[]ObjectToDelete) {
		defer wg.Done()
		// signal the calling goroutine that the worker is ready tor receive tasks
		close(readyCh)
		var expired []ObjectToDelete
		for t := range taskCh {
			switch v := t.(type) {
			case noncurrentVersionsTask:
				expired = append(expired, v.versions...)
			case expiryTask: