✋️ `open()` 🚫 ⚙️ `async` & `await`.

    , 👥 📣 🎉 🐕‍🦺 🔢 ⏮️ 🐩 `def` ↩️ `async def`.

!!! info
    👆 💪 ✍ 🌅 🔃 👫 🎉 🐕‍🦺 <a href="https://www.starlette.io/events/" class="external-link" target="_blank">💃 🎉' 🩺</a>.

### `startup` &amp; `shutdown` 👯‍♂️

📤 ↕ 🤞 👈 ⚛ 👆 *🕴* &amp; *🤫* 🔗, 👆 💪 💚 ▶️ 🕳 &amp; ⤴️ 🏁 ⚫️, 📎 ℹ &amp; ⤴️ 🚀 ⚫️, ♒️.

In der technischen ASGI-Spezifikation ist dies Teil des <a href="https://asgi.readthedocs.io/en/latest/specs/lifespan.html" class="external-link" target="_blank">Lifespan Protokolls</a> und definiert Events namens `startup` und `shutdown`.

!!! info
    Weitere Informationen zu Starlettes `lifespan`-Handlern finden Sie in <a href="https://www.starlette.io/lifespan/" class="external-link" target="_blank">Starlettes Lifespan-Dokumentation</a>.

Por baixo, na especificação técnica ASGI, essa é a parte do <a href="https://asgi.readthedocs.io/en/latest/specs/lifespan.html" class="external-link" target="_blank">Protocolo Lifespan</a>, e define eventos chamados `startup` e `shutdown`.

!!! info "Informação"
    Você pode ler mais sobre o manipulador `lifespan` do Starlette na <a href="https://www.starlette.io/lifespan/" class="external-link" target="_blank">Documentação do Lifespan Starlette</a>.

    这个函数执行 I/O（输入/输出）操作，需要等待内容写进磁盘。

    但 `open()` 函数不支持使用 `async` 与 `await`。

    因此，声明事件处理函数要使用 `def`，不能使用 `asnyc def`。

!!! info "说明"

Underneath, in the ASGI technical specification, this is part of the <a href="https://asgi.readthedocs.io/en/latest/specs/lifespan.html" class="external-link" target="_blank">Lifespan Protocol</a>, and it defines events called `startup` and `shutdown`.

!!! info
    You can read more about the Starlette `lifespan` handlers in <a href="https://www.starlette.io/lifespan/" class="external-link" target="_blank">Starlette's  Lifespan' docs</a>.

    따라서 디스크에 데이터를 쓰기 위해 "대기"가 필요한 I/O (입력/출력) 작업을 수행합니다.

    그러나 `open()`은 `async`와 `await`을 사용하지 않기 때문에 이벤트 핸들러 함수는 `async def`가 아닌 표준 `def`로 선언하고 있습니다.

!!! info "정보"