Aber falls es in einem fortgeschrittenen Szenario notwendig ist, können Sie benutzerdefinierte Header wie folgt hinzufügen:

```Python hl_lines="14"
{!../../docs_src/handling_errors/tutorial002.py!}
```

## Benutzerdefinierte Exceptionhandler definieren

You probably won't need to use it directly in your code.

But in case you needed it for an advanced scenario, you can add custom headers:

```Python hl_lines="14"
{!../../docs_src/handling_errors/tutorial002.py!}
```

## Install custom exception handlers

{!> ../../docs_src/extra_models/tutorial002_py310.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="9  15-16  19-20  23-24"
{!> ../../docs_src/extra_models/tutorial002.py!}
```

////

## `Union`, oder `anyOf`

```Python hl_lines="6-9"
{!../../docs_src/background_tasks/tutorial001.py!}
```

## Den Hintergrundtask hinzufügen

Übergeben Sie innerhalb Ihrer *Pfadoperation-Funktion* Ihre Taskfunktion mit der Methode `.add_task()` an das *Hintergrundtasks*-Objekt:

```Python hl_lines="14"
{!../../docs_src/background_tasks/tutorial001.py!}
```

`.add_task()` erhält als Argumente:

//// tab | Python 3.8 без Annotated

/// tip | "Подсказка"

Рекомендуется использовать версию с `Annotated` если возможно.

///

```Python hl_lines="7"
{!> ../../docs_src/path_params_numeric_validations/tutorial002.py!}
```

////

Но имейте в виду, что если вы используете `Annotated`, вы не столкнётесь с этой проблемой, так как вы не используете `Query()` или `Path()` в качестве значения по умолчанию для параметра функции.

```Python hl_lines="17"
{!../../docs_src/path_params/tutorial005.py!}
```

#### *Enumeration Değerini* Edinelim

`model_name.value` veya genel olarak `your_enum_member.value` tanımlarını kullanarak (bu durumda bir `str` olan) gerçek değere ulaşabilirsiniz:

```Python hl_lines="20"
{!../../docs_src/path_params/tutorial005.py!}
```

/// tip | "İpucu"

まず初めに、`fastapi`から`Path`をインポートします:

```Python hl_lines="1"
{!../../docs_src/path_params_numeric_validations/tutorial001.py!}
```

## メタデータの宣言

パラメータは`Query`と同じものを宣言することができます。

例えば、パスパラメータ`item_id`に対して`title`のメタデータを宣言するには以下のようにします:

```Python hl_lines="8"
{!../../docs_src/path_params_numeric_validations/tutorial001.py!}
```

/// note | "備考"

パスの一部でなければならないので、パスパラメータは常に必須です。

そのため、`...`を使用して必須と示す必要があります。

* 🚘-🛠️
* 🆎 ✅
* 🛠️
* 🔎
* 🔬

///

## ⚙️ 🏷

🔘 🔢, 👆 💪 🔐 🌐 🔢 🏷 🎚 🔗:

//// tab | 🐍 3️⃣.6️⃣ & 🔛

```Python hl_lines="21"
{!> ../../docs_src/body/tutorial002.py!}
```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="19"
{!> ../../docs_src/body/tutorial002_py310.py!}
```

////

## 📨 💪 ➕ ➡ 🔢

```Python hl_lines="2  6-38  41-43"
{!../../docs_src/websockets/tutorial001.py!}
```

## Create a `websocket`

In your **FastAPI** application, create a `websocket`:

```Python hl_lines="1  46-47"
{!../../docs_src/websockets/tutorial001.py!}
```

/// note | "Technical Details"

You could also use `from starlette.websockets import WebSocket`.

{!> ../../docs_src/extra_models/tutorial002_py310.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="9  15-16  19-20  23-24"
{!> ../../docs_src/extra_models/tutorial002.py!}
```

////

## `Union` or `anyOf`

You can declare a response to be the `Union` of two or more types, that means, that the response would be any of them.