responses_from_routes.append(route.response_field)
            if route.response_fields:
                responses_from_routes.extend(route.response_fields.values())
            if route.callbacks:
                callback_flat_models.extend(get_fields_from_routes(route.callbacks))
            params = get_flat_params(route.dependant)
            request_fields_from_routes.extend(params)

Для URL:

```
https://example.com/items/foo
```

...путь выглядит так:

```
/items/foo
```

!!! info "Дополнительная иформация"
    Термин "path" также часто называется "endpoint" или "route".

При создании API, "путь" является основным способом разделения "задач" и "ресурсов".

#### Операция (operation)

"Операция" это один из "методов" HTTP.

Таких, как:

* `POST`
* `GET`

In einer URL wie:

```
https://example.com/items/foo
```

... wäre der Pfad folglich:

```
/items/foo
```

!!! info
    Ein „Pfad“ wird häufig auch als „Endpunkt“ oder „Route“ bezeichnet.

Bei der Erstellung einer API ist der „Pfad“ die wichtigste Möglichkeit zur Trennung von „Anliegen“ und „Ressourcen“.

#### Operation

„Operation“ bezieht sich hier auf eine der HTTP-„Methoden“.

app = FastAPI()


class Item(BaseModel):
    name: str
    price: Optional[float] = None


@app.api_route("/items/{item_id}", methods=["GET"])
def get_items(item_id: str):
    return {"item_id": item_id}


def get_not_decorated(item_id: str):
    return {"item_id": item_id}


app.add_api_route("/items-not-decorated/{item_id}", get_not_decorated)


@app.delete("/items/{item_id}")

So, in a URL like:

```
https://example.com/items/foo
```

...the path would be:

```
/items/foo
```

!!! info
    A "path" is also commonly called an "endpoint" or a "route".

While building an API, the "path" is the main way to separate "concerns" and "resources".

#### Operation

"Operation" here refers to one of the HTTP "methods".

One of:

* `POST`
* `GET`

It is a plug-in for many frameworks (and there's a plug-in for Starlette too).

The way it works is that you write the definition of the schema using YAML format inside the docstring of each function handling a route.

And it generates OpenAPI schemas.

That's how it works in Flask, Starlette, Responder, etc.

But then, we have again the problem of having a micro-syntax, inside of a Python string (a big YAML).

https://example.com/items/foo
```

... yol şöyle olur:

```
/items/foo
```

!!! info "Bilgi"
    "Yol" genellikle "<abbr title="Endpoint: Bitim Noktası">endpoint</abbr>" veya "<abbr title="Route: Yönlendirme/Yön">route</abbr>" olarak adlandırılır.

Bir API oluştururken, "yol", "kaynaklar" ile "endişeleri" ayırmanın ana yöntemidir.

#### Operasyonlar

Burada "operasyon" HTTP "metodlarından" birini ifade eder.

    address = ":9999"

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

This tells Traefik to listen on port 9999 and to use another file `routes.toml`.

!!! tip
    We are using port 9999 instead of the standard HTTP port 80 so that you don't have to run it with admin (`sudo`) privileges.

Now create that other file `routes.toml`:

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

Donc, dans un URL tel que :

```
https://example.com/items/foo
```

...le "path" serait :

```
/items/foo
```

!!! info
    Un chemin, ou "path" est aussi souvent appelé route ou "endpoint".


#### Opération

"Opération" fait référence à une des "méthodes" HTTP.

Une de :

* `POST`
* `GET`
* `PUT`
* `DELETE`

...ou une des plus exotiques :

<img src="/img/tutorial/path-params/image02.png">

De la même façon, il existe bien d'autres outils compatibles, y compris des outils de génération de code
pour de nombreux langages.

## Pydantic

Toute la validation de données est effectué en arrière-plan avec <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a>,