Şu tip anotasyonuna sahiptik:

```Python
q: str | None = None
```

Şimdi bunu `Annotated` ile saracağız; şöyle olacak:

```Python
q: Annotated[str | None] = None
```

Bu iki sürüm de aynı anlama gelir: `q`, `str` veya `None` olabilen bir parametredir ve varsayılan olarak `None`’dır.

Şimdi işin eğlenceli kısmına geçelim. 🎉

    unfiltered.put("apple", 2);
    unfiltered.put("banana", 6);
    unfiltered.put("cat", 4);
    unfiltered.put("dog", 3);
    SortedMap<String, Integer> filtered = Maps.filterEntries(unfiltered, CORRECT_LENGTH);

    assertEquals(ImmutableMap.of("banana", 6), filtered.headMap("dog"));
    assertEquals(ImmutableMap.of(), filtered.headMap("banana"));
    assertEquals(ImmutableMap.of("banana", 6, "dog", 3), filtered.headMap("emu"));

    bimap.put(Currency.DOLLAR, Country.CANADA);
    assertEquals(Country.CANADA, bimap.get(Currency.DOLLAR));
    assertEquals(Currency.DOLLAR, bimap.inverse().get(Country.CANADA));
  }

  public void testCreateFromMap() {
    /* Test with non-empty Map. */
    Map<Currency, Country> map =
        ImmutableMap.of(
            Currency.DOLLAR, Country.CANADA,
            Currency.PESO, Country.CHILE,

## Dokümantasyon { #documentation }

Tarayıcınızı [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs) adresinde açtığınızda, aşağıdaki gibi otomatik ve interaktif bir API dokümantasyonu görürsünüz:

<img src="/img/tutorial/path-params/image01.png">

/// check | Ek bilgi

Yine, sadece aynı Python tip tanımıyla **FastAPI** size otomatik ve interaktif dokümantasyon (Swagger UI entegrasyonuyla) sağlar.

## Документація { #documentation }

А коли ви відкриєте у браузері [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs), ви побачите автоматичну, інтерактивну, API-документацію на кшталт:

<img src="/img/tutorial/path-params/image01.png">

/// check | Перевірте

Знову ж таки, лише з тим самим оголошенням типу в Python **FastAPI** надає вам автоматичну, інтерактивну документацію (з інтеграцією Swagger UI).

Et lorsque vous ouvrez votre navigateur sur [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs), vous verrez une documentation d'API automatique et interactive comme :

<img src="/img/tutorial/path-params/image01.png">

/// check | Vérifications

À nouveau, simplement avec cette même déclaration de type Python, **FastAPI** vous fournit une documentation interactive automatique (intégrant Swagger UI).

* `needy`, a required `str`.
* `skip`, an `int` with a default value of `0`.
* `limit`, an optional `int`.

/// tip

You could also use `Enum`s the same way as with [Path Parameters](path-params.md#predefined-values).

* `skip`, un `int` avec une valeur par défaut de `0`.
* `limit`, un `int` optionnel.

/// tip | Astuce

Vous pourriez aussi utiliser des `Enum`s de la même façon qu'avec les [Paramètres de chemin](path-params.md#predefined-values).

        pw.println("                                 cantaloupe, watermelon, \\");
        pw.println("                                 kiwi, mango");

        java.util.Properties p = new java.util.Properties();
        p.load(new StringReader(sw.toString()));
        Object o24 = p.getProperty("fruits");

from ._compat import (
    Undefined,
)
from .datastructures import _Unset


class ParamTypes(Enum):
    query = "query"
    header = "header"
    path = "path"
    cookie = "cookie"


class Param(FieldInfo):  # type: ignore[misc]
    in_: ParamTypes

    def __init__(
        self,
        default: Any = Undefined,
        *,
        default_factory: Callable[[], Any] | None = _Unset,