```JSON
{"message": "Hello World"}
```

### Interactive API docs

Now go to <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

You will see the automatic interactive API documentation (provided by <a href="https://github.com/swagger-api/swagger-ui" class="external-link" target="_blank">Swagger UI</a>):

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

		return nil, config.ErrInvalidNumberOfErasureEndpoints(nil).Msg(msg)
	}

	var setSize uint64
	// Custom set drive count allows to override automatic distribution.
	// only meant if you want to further optimize drive distribution.
	if setDriveCount > 0 {
		msg := fmt.Sprintf("Invalid set drive count. Acceptable values for %d number drives are %d", commonSize, setCounts)

     * The given dependency should be one of the paths returned by {@link #getDependencies()}.
     * The module name is extracted from the {@code module-info.class} file if present, otherwise from
     * the {@code "Automatic-Module-Name"} attribute of the {@code META-INF/MANIFEST.MF} file if present.
     *
     * <p>A typical usage is to invoke this method for all dependencies having a

<img src="/img/tutorial/behind-a-proxy/image03.png">

/// tip

The docs UI will interact with the server that you select.

///

### Disable automatic server from `root_path`

If you don't want **FastAPI** to include an automatic server using the `root_path`, you can use the parameter `root_path_in_servers=False`:

{* ../../docs_src/behind_a_proxy/tutorial004.py hl[9] *}

* Correctness at startup; with the sequencing above, items are only processed once all informers are synced. This means queries will not return stale data at startup.
* Deduping of identical events
* Automatic retrying of failed events (configurable)

The above logic is critical to handle correctly to ensure correctness of a controller.

* Editor support (obviously)
* Data <abbr title="converting the string that comes from an HTTP request into Python data">"parsing"</abbr>
* Data validation
* Automatic documentation

## Defaults

As query parameters are not a fixed part of a path, they can be optional and can have default values.

In the example above they have default values of `skip=0` and `limit=10`.

			} else if nsLabel != "" {
				outMsg := fmt.Sprintf("Namespace label %s matches", nsLabel)
				if strings.Contains(nsLabel, "kubernetes.io/metadata.name") {
					outMsg += " (Automatic injection is enabled in all namespaces)."
				}
				return outMsg, true
			} else if podLabel != "" {
				return fmt.Sprintf("Pod label %s matches", podLabel), true
			}
		} else if nsMatched {

{!../../docs_src/metadata/tutorial001.py!}
```

/// tip | Dica

Você pode escrever Markdown no campo `description` e ele será renderizado na saída.

///

Com essa configuração, a documentação automática da API se pareceria com:

<img src="/img/tutorial/metadata/image01.png">

## Identificador de Licença

Desde o OpenAPI 3.1.0 e FastAPI 0.99.0, você também pode definir o license_info com um identifier em vez de uma url.

فریم ورک **FastAPI** بر اساس **OpenAPI** است.

این خاصیت، امکان دارد تا چندین رابط مستندات تعاملی خودکار(automatic interactive documentation interfaces)، تولید کد و غیره وجود داشته باشد.

مشخصه OpenAPI روشی برای تعریف چندین "schemes" دارد.

* Show a **clear error** for the client when the data is not valid
* **Document** the parameter in the OpenAPI schema *path operation* (so it will show up in the **automatic docs UI**)

## Alternative (old): `Query` as the default value