## Exemplo { #example }

Para um exemplos simples, vamos considerar uma estrutura de arquivos semelhante ao descrito em [Bigger Applications](../tutorial/bigger-applications.md){.internal-link target=_blank} e [Testing](../tutorial/testing.md){.internal-link target=_blank}:

```
.
├── app

/// info

This requires installing `orjson` for example with `pip install orjson`.

///

### `UJSONResponse` { #ujsonresponse }

An alternative JSON response using <a href="https://github.com/ultrajson/ultrajson" class="external-link" target="_blank">`ujson`</a>.

/// info

/// info | Info

Dazu muss `orjson` installiert werden, z. B. mit `pip install orjson`.

///

### `UJSONResponse` { #ujsonresponse }

Eine alternative JSON-Response mit <a href="https://github.com/ultrajson/ultrajson" class="external-link" target="_blank">`ujson`</a>.

/// info | Info

## Dependências para conjuntos de *operações de rota* { #dependencies-for-groups-of-path-operations }

Zum Beispiel bietet **FastAPI** selbst eine alternative API-Dokumentation (verwendet ReDoc), welche Sie unter <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a> einsehen können:

<img src="/img/tutorial/path-params/image02.png">

请记住可以 <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">用'X-' 前缀</a>添加专有自定义请求头.

但是如果你想让浏览器中的客户端看到你的自定义请求头, 你需要把它们加到 CORS 配置 ([CORS (Cross-Origin Resource Sharing)](cors.md){.internal-link target=_blank}) 的 `expose_headers` 参数中,在 <a href="https://www.starlette.dev/middleware/#corsmiddleware" class="external-link" target="_blank">Starlette's CORS docs</a>文档中.

///

/// note | 技术细节

    }

    // Utility: reflectively set a private/protected field (searches up the hierarchy)
    private static void setField(Object target, String name, Object value) {
        try {
            Field f = findField(target.getClass(), name);
            f.setAccessible(true);
            f.set(target, value);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    * 自動バリデーション、シリアライゼーション、対話的なドキュメント、OAuth2 JWTトークンを用いた認証などを含む、<a href="https://fastapi.tiangolo.com/features/" class="external-link" target="_blank">**その他多くの機能**</a>。
* **セキュアなパスワード** ハッシュ化 (デフォルトで)。
* **JWTトークン** 認証。

So, a `datetime` object would have to be converted to a `str` containing the data in <a href="https://en.wikipedia.org/wiki/ISO_8601" class="external-link" target="_blank">ISO format</a>.

The same way, this database wouldn't receive a Pydantic model (an object with attributes), only a `dict`.

You can use `jsonable_encoder` for that.

  abstract ImmutableCollection<E> delegateCollection();

  @Override
  public boolean contains(@Nullable Object target) {
    // The collection's contains() is at least as fast as ImmutableList's
    // and is often faster.
    return delegateCollection().contains(target);
  }

  @Override
  public int size() {
    return delegateCollection().size();
  }

  @Override
  public boolean isEmpty() {