callbacks=callback_router4.routes,
    deprecated=True,
)
router4_default = APIRouter()


@app.get(
    "/override1",
    tags=["path1a", "path1b"],
    responses={
        401: {"description": "Client error level 1"},
        501: {"description": "Server error level 1"},
    },
    deprecated=True,
    callbacks=callback_router1.routes,
    dependencies=[Depends(dep1)],

* `app/dependencies.py` ファイルもあり、`app/main.py` と同様に「モジュール」: `app.dependencies` です。
* `app/routers/` サブディレクトリに別の `__init__.py` があるので、「Python サブパッケージ」: `app.routers` です。
* `app/routers/items.py` はパッケージ `app/routers/` 内のファイルなので、サブモジュール: `app.routers.items` です。
* `app/routers/users.py` も同様で、別のサブモジュール: `app.routers.users` です。
* `app/internal/` サブディレクトリにも `__init__.py` があるので、別の「Python サブパッケージ」: `app.internal` です。

[providers]
  [providers.file]
    filename = "routes.toml"
```

Cela indique à Traefik d'écouter sur le port 9999 et d'utiliser un autre fichier `routes.toml`.

/// tip | Astuce

Nous utilisons le port 9999 au lieu du port HTTP standard 80 afin que vous n'ayez pas à l'exécuter avec des privilèges administrateur (`sudo`).

///

Créez maintenant cet autre fichier `routes.toml` :

```TOML hl_lines="5  12  20"

from fastapi import Depends, FastAPI

from .dependencies import get_query_token, get_token_header
from .internal import admin
from .routers import items, users

app = FastAPI(dependencies=[Depends(get_query_token)])


app.include_router(users.router)
app.include_router(items.router)
app.include_router(
    admin.router,
    prefix="/admin",
    tags=["admin"],
    dependencies=[Depends(get_token_header)],

    assert response.json() == expected_response


def test_route_classes():
    routes = {}
    for r in app.router.routes:
        assert isinstance(r, Route)
        routes[r.path] = r
    assert getattr(routes["/a/"], "x_type") == "A"  # noqa: B009
    assert getattr(routes["/a/b/"], "x_type") == "B"  # noqa: B009
    assert getattr(routes["/a/b/c/"], "x_type") == "C"  # noqa: B009


def test_openapi_schema():

///

### Agrega el router de callback { #add-the-callback-router }

En este punto tienes las *path operation(s)* del callback necesarias (las que el *desarrollador externo* debería implementar en la *API externa*) en el router de callback que creaste arriba.

///

### 加入回呼 router { #add-the-callback-router }

此時你已經在先前建立的回呼 router 中，擁有所需的回呼「路徑操作（們）」（也就是「外部開發者」應該在「外部 API」中實作的那些）。

現在在「你的 API 的路徑操作裝飾器」中使用參數 `callbacks`，將該回呼 router 的屬性 `.routes`（實際上就是一個由路由／「路徑操作」所組成的 `list`）傳入：

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[33] *}

/// tip

## Including Routers

When declaring routers, prefer to add router level parameters like prefix, tags, etc. to the router itself, instead of in `include_router()`.

Do this:

```python
from fastapi import APIRouter, FastAPI

app = FastAPI()

router = APIRouter(prefix="/items", tags=["items"])


@router.get("/")
async def list_items():
    return []

///

### Add the callback router { #add-the-callback-router }

At this point you have the *callback path operation(s)* needed (the one(s) that the *external developer*  should implement in the *external API*) in the callback router you created above.

Now use the parameter `callbacks` in *your API's path operation decorator* to pass the attribute `.routes` (that's actually just a `list` of routes/*path operations*) from that callback router:

[providers]
  [providers.file]
    filename = "routes.toml"
```

Bu, Traefik'e 9999 portunda dinlemesini ve `routes.toml` adlı başka bir dosyayı kullanmasını söyler.

/// tip | İpucu

Standart HTTP portu 80 yerine 9999 portunu kullanıyoruz; böylece admin (`sudo`) yetkileriyle çalıştırmanız gerekmez.

///

Şimdi diğer dosyayı, `routes.toml`'u oluşturun:

```TOML hl_lines="5  12  20"
[http]