Este é um caso de uso mais avançado. Sinta-se à vontade para pular.

///

Por padrão, o **FastAPI** criará um `server` no OpenAPI schema com o URL para o `root_path`.

Mas você também pode fornecer outros `servers` alternativos, por exemplo, se quiser que a *mesma* interface de documentação interaja com ambientes de staging e produção.

...
```

#### What is OpenAPI for

The OpenAPI schema is what powers the two interactive documentation systems included.

And there are dozens of alternatives, all based on OpenAPI. You could easily add any of those alternatives to your application built with **FastAPI**.

You could also use it to generate code automatically, for clients that communicate with your API. For example, frontend, mobile or IoT applications.

          <name>deprecation</name>
          <description>A preferred alternative to this expression, in the case where it's deprecated.</description>
          <type>String</type>
        </field>
        <field>
          <version>1.0.0</version>
          <name>ban</name>
          <description>A preferred alternative to this expression, in the case where it's banned from use.</description>

The `lifespan` parameter of the `FastAPI` app takes an **async context manager**, so we can pass our new `lifespan` async context manager to it.

{* ../../docs_src/events/tutorial003.py hl[22] *}

## Alternative Events (deprecated)

/// warning

            The parameter is available only for compatibility.
            """
        ),
    ] = _Unset,
    alias: Annotated[
        Optional[str],
        Doc(
            """
            An alternative name for the parameter field.

            This will be used to extract the data and for the generated OpenAPI.
            It is particularly useful when you can't use the name you want because it

        /*
         * NOTE: This provides backward-compat with maven-deploy-plugin:2.4 which bypasses the repository factory when
         * using an alternative deployment location.
         */
        if (deploymentRepository instanceof DefaultArtifactRepository
                && deploymentRepository.getAuthentication() == null) {

RUN /setup.python.sh python3.11 devel.requirements.txt
RUN /setup.python.sh python3.12 devel.requirements.txt
RUN /setup.python.sh python3.13 devel.requirements.txt
# "python3" commands by default run under 3.10

 * lifecycle phase. Standard lifecycles use plugin execution {@code <phase>} or mojo default lifecycle phase to
 * calculate the execution plan, but custom lifecycles can use alternative mapping strategies.
 * <p>
 * Implementations of this interface must be annotated with either {@code @Named("lifecycle-id")} or equivalent plexus
 * {@code @Component} annotations.
 *
 * @since 3.2.0

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png)

### Alternative API docs

And now, go to <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a>.

You will see the alternative automatic documentation (provided by <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank">ReDoc</a>):

### `ORJSONResponse`

Uma alternativa mais rápida de resposta JSON utilizando o <a href="https://github.com/ijl/orjson" class="external-link" target="_blank">`orjson`</a>, como você leu acima.

/// info | Informação

Essa resposta requer a instalação do pacote `orjson`, com o comando `pip install orjson`, por exemplo.

///

### `UJSONResponse`