```Python hl_lines="6"
{!../../docs_src/events/tutorial002.py!}
```

Hier schreibt die `shutdown`-Eventhandler-Funktion eine Textzeile `"Application shutdown"` in eine Datei `log.txt`.

/// info

g:{},ajaxSettings:{url:Et.href,type:"GET",isLocal:/^(?:about|app|app-storage|.+-extension|file|res|widget):$/.test(Et.protocol),global:!0,processData:!0,async:!0,contentType:"application/x-www-form-urlencoded; charset=UTF-8",accepts:{"*":zt,text:"text/plain",html:"text/html",xml:"application/xml, text/xml",json:"application/json, text/javascript"},contents:{xml:/\bxml\b/,html:/\bhtml/,json:/\bjson\b/},responseFields:{xml:"responseXML",text:"responseText",json:"responseJSON"},converters:{"* text":String,"text...

Events
======

Events allow you to capture metrics on your application’s HTTP calls. Use events to monitor:

 * The size and frequency of the HTTP calls your application makes. If you’re making too many calls, or your calls are too large, you should know about it!
 * The performance of these calls on the underlying network. If the network’s performance isn’t sufficient, you need to either improve the network or use less of it.

### EventListener

  }

  private fun dnsResponse(s: String): MockResponse {
    return MockResponse.Builder()
      .body(Buffer().write(s.decodeHex()))
      .addHeader("content-type", "application/dns-message")
      .addHeader("content-length", s.length / 2)
      .build()
  }

  private fun buildLocalhost(
    bootstrapClient: OkHttpClient,
    includeIPv6: Boolean,
    post: Boolean = false,

### `shutdown` 🎉

🚮 🔢 👈 🔜 🏃 🕐❔ 🈸 🤫 🔽, 📣 ⚫️ ⏮️ 🎉 `"shutdown"`:

```Python hl_lines="6"
{!../../docs_src/events/tutorial002.py!}
```

📥, `shutdown` 🎉 🐕‍🦺 🔢 🔜 ✍ ✍ ⏸ `"Application shutdown"` 📁 `log.txt`.

/// info

`open()` 🔢, `mode="a"` ⛓ "🎻",, ⏸ 🔜 🚮 ⏮️ ⚫️❔ 🔛 👈 📁, 🍵 📁 ⏮️ 🎚.

///

/// tip

👀 👈 👉 💼 👥 ⚙️ 🐩 🐍 `open()` 🔢 👈 🔗 ⏮️ 📁.

You can use the Select API to query objects with following features:

- Objects must be in CSV, JSON, or Parquet(*) format.

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [28720]
INFO:     Started server process [28722]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary>🔃 📋 <code>uvicorn main:app --reload</code>...</summary>

📋 `uvicorn main:app` 🔗:

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [28720]
INFO:     Started server process [28722]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary>על הפקודה <code>uvicorn main:app --reload</code>...</summary>

הפקודה `uvicorn main:app` מתייחסת ל:

    private static final String DOC_ID_FIELD = "doc_id";

    protected static final String GET = "GET";

    protected static final String POST = "POST";

    protected String mimeType = "application/json";

    public SearchApiManager() {
        setPathPrefix("/api/v1");
    }

    @PostConstruct
    public void register() {
        if (logger.isInfoEnabled()) {

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [28720]
INFO:     Started server process [28722]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary><code>uvicorn main:app --reload</code> komutuyla ilgili...</summary>