//    executing listeners in the order they were added
    // 3. push all the items onto 'onto' and return the new head of the stack
    Listener head = ATOMIC_HELPER.gasListeners(this, Listener.TOMBSTONE);
    Listener reversedList = onto;
    while (head != null) {
      Listener tmp = head;
      head = head.next;
      tmp.next = reversedList;
      reversedList = tmp;

Tenho evitado criar um novo framework por anos. Primeiramente tentei resolver todos os recursos cobertos pelo **FastAPI** utilizando muitos frameworks diferentes, plug-ins e ferramentas.

!!! check "Verifique"
	Então, com a mesma declaração de tipo do Python, o **FastAPI** dá pra você validação de dados.

	Observe que o erro também mostra claramente o ponto exato onde a validação não passou.

	Isso é incrivelmente útil enquanto se desenvolve e debuga o código que interage com a sua API.

## Documentação

```Python hl_lines="3"
{!../../../docs_src/first_steps/tutorial001.py!}
```

Aqui, a variável `app` será uma "instância" da classe `FastAPI`.

Este será o principal ponto de interação para criar toda a sua API.

Este `app` é o mesmo referenciado por `uvicorn` no comando:

<div class="termy">

```console
$ uvicorn main:app --reload

         alt="Istio logo" title="Istio" height="100" width="100" />
</a>

---

 *
 * @param <B> The concrete type of this builder (the 'self-type'). All the Builder methods of this
 *     class (such as {@link #named}) return this type, so that Builder methods of more derived
 *     classes can be chained onto them without casting.
 * @param <G> The type of the generator to be passed to testers in the generated test suite. An
 *     instance of G should somehow provide an instance of the class under test, plus any other

                       const ComputeFunc& compute_func, TF_Status* status) {
    if (max_age_ == 0) {
      return compute_func(key, value, status);
    }

    // Note: we hold onto mu_ for the rest of this function. In practice, this
    // is okay, as stat requests are typically fast, and concurrent requests are
    // often for the same file. Future work can split this up into one lock per

   * the String used to construct them is no longer strongly referenced outside of the CipherSuite.
   */
  @Test
  fun instancesAreInterned_survivesGarbageCollection() {
    // We're not holding onto a reference to this String instance outside of the CipherSuite...
    val cs = forJavaName("FakeCipherSuite_instancesAreInterned")
    System.gc() // Unless cs references the String instance, it may now be garbage collected.

metadata server), and a `TokenExchanger` which allows exchanging a token for another form to match the CA server requirements.

For VMs, the standard flow is for the user to provision a short-lived JWT token onto the VM. After the initial
CSR, certificates are written to disk and mTLS is used for future requests. If the VM restarted, it would continue

    * Bekommen Sie mit, wenn ich Ankündigungen mache oder neue Tools veröffentliche.
    * Sie können auch <a href="https://twitter.com/fastapi" class="external-link" target="_blank">@fastapi auf Twitter folgen</a> (ein separates Konto).
* <a href="https://www.linkedin.com/in/tiangolo/" class="external-link" target="_blank">Folgen Sie mir auf **LinkedIn**</a>.