```

=== "Python 3.9+"

    ```Python hl_lines="9"
    {!> ../../../docs_src/header_params/tutorial001_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="10"
    {!> ../../../docs_src/header_params/tutorial001_an.py!}
    ```

=== "Python 3.10+ nicht annotiert"

    !!! tip "Tipp"
        Bevorzugen Sie die `Annotated`-Version, falls möglich.

    ```

=== "Python 3.9+"

    ```Python hl_lines="9"
    {!> ../../../docs_src/header_params/tutorial001_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="10"
    {!> ../../../docs_src/header_params/tutorial001_an.py!}
    ```

=== "Python 3.10+ non-Annotated"

    !!! tip
        Prefer to use the `Annotated` version if possible.

    ```Python hl_lines="7"

=== "Python 3.10+"

    ```Python hl_lines="8"
    {!> ../../../docs_src/header_params/tutorial002_py310.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="10"
    {!> ../../../docs_src/header_params/tutorial002.py!}
    ```

!!! warning "Aviso"

    ```

=== "Python 3.9+"

    ```Python hl_lines="9"
    {!> ../../../docs_src/header_params/tutorial001_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="10"
    {!> ../../../docs_src/header_params/tutorial001_an.py!}
    ```

=== "Python 3.10+ без Annotated"

    !!! tip "Подсказка"
        Предпочтительнее использовать версию с аннотацией, если это возможно.

    ```

=== "Python 3.9+"

    ```Python hl_lines="9"
    {!> ../../../docs_src/header_params/tutorial001_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="10"
    {!> ../../../docs_src/header_params/tutorial001_an.py!}
    ```

=== "Python 3.10+ non-Annotated"

    !!! tip
        尽可能选择使用 `Annotated` 的版本。

    ```Python hl_lines="7"

따라서, `User_Agent` 등과 같이 첫 문자를 대문자화할 필요없이 파이썬 코드에서처럼 `user_agent`로 사용합니다.

만약 언더스코어를 하이픈으로 자동 변환을 비활성화해야 할 어떤 이유가 있다면, `Header`의 `convert_underscores` 매개변수를 `False`로 설정하십시오:

```Python hl_lines="10"
{!../../../docs_src/header_params/tutorial002.py!}
```

!!! warning "경고"
    `convert_underscore`를 `False`로 설정하기 전에, 어떤 HTTP 프록시들과 서버들은 언더스코어가 포함된 헤더 사용을 허락하지 않는다는 것을 명심하십시오.

## 중복 헤더

, 👆 💪 ⚙️ `user_agent` 👆 🛎 🔜 🐍 📟, ↩️ 💆‍♂ 🎯 🥇 🔤 `User_Agent` ⚖️ 🕳 🎏.

🚥 🤔 👆 💪 ❎ 🏧 🛠️ 🎦 🔠, ⚒ 🔢 `convert_underscores` `Header` `False`:

=== "🐍 3️⃣.6️⃣ & 🔛"

    ```Python hl_lines="10"
    {!> ../../../docs_src/header_params/tutorial002.py!}
    ```

=== "🐍 3️⃣.1️⃣0️⃣ & 🔛"

    ```Python hl_lines="8"
    {!> ../../../docs_src/header_params/tutorial002_py310.py!}
    ```

!!! warning