///

## Sobrescribir los valores por defecto

Usando la información anterior, puedes usar la misma función de utilidad para generar el esquema de OpenAPI y sobrescribir cada parte que necesites.

Por ejemplo, vamos a añadir <a href="https://github.com/Rebilly/ReDoc/blob/master/docs/redoc-vendor-extensions.md#x-logo" class="external-link" target="_blank">la extensión OpenAPI de ReDoc para incluir un logo personalizado</a>.

### **FastAPI** normal

        Collector.Characteristics.UNORDERED);
  }

  /** Returns the number of values. */
  public long count() {
    return count;
  }

  /**
   * Returns the <a href="http://en.wikipedia.org/wiki/Arithmetic_mean">arithmetic mean</a> of the
   * values. The count must be non-zero.
   *
   * <p>If these values are a sample drawn from a population, this is also an unbiased estimator of

For example, it doesn't receive `datetime` objects, as those are not compatible with JSON.

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`.

///

## 🛃 🎚

✔️ 🤯 👈 🛃 © 🎚 💪 🚮 <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">⚙️ '✖-' 🔡</a>.

Por exemplo, ele não recebe objetos `datetime`, pois estes objetos não são compatíveis com JSON.

Então, um objeto `datetime` teria que ser convertido em um `str` contendo os dados no formato  <a href="https://en.wikipedia.org/wiki/ISO_8601" class="external-link" target="_blank">ISO</a>.

Da mesma forma, este banco de dados não receberia um modelo Pydantic (um objeto com atributos), apenas um `dict`.

          <description>
            Type of toolchain:&lt;ul>
            &lt;li>{@code jdk} for &lt;a
            href="https://maven.apache.org/plugins/maven-toolchains-plugin/toolchains/jdk.html">JDK Standard Toolchain&lt;/a>,&lt;/li>
            &lt;li>other value for &lt;a
            href="https://maven.apache.org/plugins/maven-toolchains-plugin/toolchains/custom.html">Custom Toolchain&lt;/a>&lt;/li>
            &lt;/ul>

And the rest will be handled by **FastAPI**.

If you run it and go to <a href="http://localhost:8000/v1/" class="external-link" target="_blank">http://localhost:8000/v1/</a> you will see the response from Flask:

```txt
Hello, World from Flask!
```

And if you go to <a href="http://localhost:8000/v2" class="external-link" target="_blank">http://localhost:8000/v2</a> you will see the response from FastAPI:

**Swagger UI** usa os arquivos:

* <a href="https://cdn.jsdelivr.net/npm/swagger-ui-dist@5/swagger-ui-bundle.js" class="external-link" target="_blank">`swagger-ui-bundle.js`</a>
* <a href="https://cdn.jsdelivr.net/npm/swagger-ui-dist@5/swagger-ui.css" class="external-link" target="_blank">`swagger-ui.css`</a>

E o **ReDoc** usa os arquivos:

/// tip | Consejo

El callback real es solo un request HTTP.

Cuando implementes el callback tú mismo, podrías usar algo como <a href="https://www.python-httpx.org" class="external-link" target="_blank">HTTPX</a> o <a href="https://requests.readthedocs.io/" class="external-link" target="_blank">Requests</a>.

///

## Escribir el código de documentación del callback

### کد ناهم‌زمان خودت رو بنویس

Starlette (و **FastAPI**) بر پایه <a href="https://anyio.readthedocs.io/en/stable/" class="external-link" target="_blank">AnyIO</a> هستن، که باعث می‌شه با کتابخونه استاندارد پایتون <a href="https://docs.python.org/3/library/asyncio-task.html" class="external-link" target="_blank">asyncio</a> و <a href="https://trio.readthedocs.io/en/stable/" class="external-link" target="_blank">Trio</a> سازگار باشه.