terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare Derivative Works of, publicly display, publicly perform, sublicense, and distribute the Work and such Derivative Works in Source or Object form. 3. Grant of Patent License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge,...

Além disso, **clientes gerados automaticamente** terão interfaces mais simples, para que os desenvolvedores que se comunicam com sua API possam ter uma experiência muito melhor trabalhando com sua API. 😎

///

<img src="/img/tutorial/generate-clients/image05.png">

## App de FastAPI con Tags

En muchos casos tu aplicación de FastAPI será más grande, y probablemente usarás tags para separar diferentes grupos de *path operations*.

Por ejemplo, podrías tener una sección para **items** y otra sección para **usuarios**, y podrían estar separadas por tags:

{* ../../docs_src/generate_clients/tutorial002_py39.py hl[21,26,34] *}

 *
 * <p>This class supports an optional fairness policy for ordering waiting producer and consumer
 * threads. By default, this ordering is not guaranteed. However, a queue constructed with fairness
 * set to {@code true} grants threads access in FIFO order. Fairness generally decreases throughput
 * but reduces variability and avoids starvation.
 *
 * <p>This class and its iterator implement all of the optional methods of the {@link

```

</div>

/// tip | Astuce

En ajoutant `standard`, Uvicorn va installer et utiliser quelques dépendances supplémentaires recommandées.

Cela inclut `uvloop`, le remplaçant performant de `asyncio`, qui fournit le gros gain de performance en matière de concurrence.

///

////

//// tab | Hypercorn

 * cache instances created by {@code CacheBuilder} will not perform any type of eviction.
 *
 * <p>Usage example:
 *
 * {@snippet :
 * LoadingCache<Key, Graph> graphs = CacheBuilder.newBuilder()
 *     .maximumSize(10000)
 *     .expireAfterWrite(Duration.ofMinutes(10))
 *     .removalListener(MY_LISTENER)
 *     .build(
 *         new CacheLoader<Key, Graph>() {

    }
  }

  @After
  public void validateNetworkState() {
    validateNetwork(network);
  }

  static <N, E> void validateNetwork(Network<N, E> network) {
    assertStronglyEquivalent(network, Graphs.copyOf(network));
    assertStronglyEquivalent(network, ImmutableNetwork.copyOf(network));

    String networkString = network.toString();
    assertThat(networkString).contains("isDirected: " + network.isDirected());

Você pode ter qualquer combinação de dependências que você quiser.

O **FastAPI** se encarrega de executá-las na ordem certa.

/// note | Detalhes Técnicos

Tudo isso funciona graças aos <a href="https://docs.python.org/3/library/contextlib.html" class="external-link" target="_blank">gerenciadores de contexto</a> do Python.

O **FastAPI** utiliza eles internamente para alcançar isso.

///

  /**
   * The HTTP <a href="https://patcg-individual-drafts.github.io/topics/">{@code
   * Sec-Browsing-Topics}</a> header field name.
   *
   * @since 32.0.0
   */
  public static final String SEC_BROWSING_TOPICS = "Sec-Browsing-Topics";

  /**
   * The HTTP <a href="https://patcg-individual-drafts.github.io/topics/">{@code
   * Observe-Browsing-Topics}</a> header field name.
   *

### Concorrência é melhor que paralelismo?

Não! Essa não é a moral da história.