async def read_items():
                    return [{"item_id": "Foo"}]
                ```

                With this app, if a client goes to `/items` (without a trailing slash),
                they will be automatically redirected with an HTTP status code of 307
                to `/items/`.
                """
            ),
        ] = True,
        docs_url: Annotated[

```Python hl_lines="6"
{!../../../docs_src/path_params/tutorial004.py!}
```

!!! tip "Consejo"
    Podrías necesitar que el parámetro contenga `/home/johndoe/myfile.txt` con un slash inicial (`/`).

    En este caso la URL sería `/files//home/johndoe/myfile.txt` con un slash doble (`//`) entre `files` y `home`.

## Repaso

Con **FastAPI**, usando declaraciones de tipo de Python intuitivas y estándares, obtienes:

```Python hl_lines="6"
{!../../../docs_src/path_params/tutorial004.py!}
```

!!! tip
    You could need the parameter to contain `/home/johndoe/myfile.txt`, with a leading slash (`/`).

    In that case, the URL would be: `/files//home/johndoe/myfile.txt`, with a double slash (`//`) between `files` and `home`.

## Recap

With **FastAPI**, by using short, intuitive and standard Python type declarations, you get:

{!../../../docs_src/path_params/tutorial004.py!}
```

!!! tip "Astuce"
    Vous pourriez avoir besoin que le paramètre contienne `/home/johndoe/myfile.txt`, avec un slash au début (`/`).

    Dans ce cas, l'URL serait : `/files//home/johndoe/myfile.txt`, avec un double slash (`//`) entre `files` et `home`.

## Récapitulatif

    * This allows having a router for `/cats` and all its *path operations*, while having one of them for `/cats`.
    * Now it doesn't have to be only `/cats/` (with a trailing slash).
    * To use it, declare the path in the *path operation* as the empty string (`""`).
    * PR [#415](https://github.com/tiangolo/fastapi/pull/415) by [@vitalik](https://github.com/vitalik).