```Python hl_lines="2  15-20"
{!../../docs_src/extending_openapi/tutorial001.py!}
```

### 🔀 🗄 🔗

🔜 👆 💪 🚮 📄 ↔, ❎ 🛃 `x-logo` `info` "🎚" 🗄 🔗:

```Python hl_lines="21-23"
{!../../docs_src/extending_openapi/tutorial001.py!}
```

### 💾 🗄 🔗

👆 💪 ⚙️ 🏠 `.openapi_schema` "💾", 🏪 👆 🏗 🔗.

👈 🌌, 👆 🈸 🏆 🚫 ✔️ 🏗 🔗 🔠 🕰 👩‍💻 📂 👆 🛠️ 🩺.

<img src="/img/tutorial/websockets/image05.png">

## 🚚 🔀 &amp; 💗 👩‍💻

🕐❔ *️⃣ 🔗 📪, `await websocket.receive_text()` 🔜 🤚 `WebSocketDisconnect` ⚠, ❔ 👆 💪 ⤴️ ✊ &amp; 🍵 💖 👉 🖼.

```Python hl_lines="81-83"
{!../../docs_src/websockets/tutorial003.py!}
```

🔄 ⚫️ 👅:

* 📂 📱 ⏮️ 📚 🖥 📑.
* ✍ 📧 ⚪️➡️ 👫.
* ⤴️ 🔐 1️⃣ 📑.

👈 🔜 🤚 `WebSocketDisconnect` ⚠, &amp; 🌐 🎏 👩‍💻 🔜 📨 📧 💖:

```

    <properties>
        <mockk.version>1.13.13</mockk.version>
        <bytebuddy.version>1.15.7</bytebuddy.version>
        <junit.version>5.11.3</junit.version>
        <fastjson.version>1.2.83</fastjson.version>
        <dslContextParameter.branch>master</dslContextParameter.branch>
    </properties>
    <groupId>Gradle_Check</groupId>
    <artifactId>Gradle_Check_dsl</artifactId>

filter := [10]float32{-1, 4: -0.1, -0.1, 9: -1}

// frequencies in Hz for equal-tempered scale (A4 = 440Hz)
noteFrequency := map[string]float32{
	"C0": 16.35, "D0": 18.35, "E0": 20.60, "F0": 21.83,
	"G0": 24.50, "A0": 27.50, "B0": 30.87,
}
</pre>


<h3 id="Function_literals">Function literals</h3>

<p>

   * label. See <a href="http://www.ietf.org/rfc/rfc2181.txt">RFC 2181</a> part 11.
   */
  private static final int MAX_LENGTH = 253;

  /**
   * Maximum size of a single part of a domain name. See <a
   * href="http://www.ietf.org/rfc/rfc2181.txt">RFC 2181</a> part 11.
   */
  private static final int MAX_DOMAIN_PART_LENGTH = 63;

                if (artifact.getVersion() == null) {
                    // set the recommended version
                    ArtifactVersion selected = artifact.getSelectedVersion();
                    // MNG-2123: null is a valid response to getSelectedVersion, don't
                    // assume it won't ever be.
                    if (selected != null) {
                        artifact.selectVersion(selected.toString());

//// tab | Python 3.9+

```Python hl_lines="79-81"
{!> ../../docs_src/websockets/tutorial003_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="81-83"
{!> ../../docs_src/websockets/tutorial003.py!}
```

////

尝试以下操作：

* 使用多个浏览器选项卡打开应用程序。
* 从这些选项卡中发送消息。
* 然后关闭其中一个选项卡。

这将引发 `WebSocketDisconnect` 异常，并且所有其他客户端都会收到类似以下的消息：

```

        try {
            fileSystemOperations.delete {
                delete(*filesToCleanUp.toTypedArray())
            }
        } catch (e: Exception) {
            // https://github.com/gradle/gradle-private/issues/2983#issuecomment-596083202
            e.printStackTrace()
        }
    }

    private
    fun TestFilesCleanupProjectState.prepareReportForCiPublishing(reports: List<File>) {

<mxfile host="65bd71144e">
    <diagram id="jyERGzDynktFHFRGN0ph" name="Page-1">
        <mxGraphModel dx="2738" dy="2173" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="1920" pageHeight="1200" math="0" shadow="0">
            <root>
                <mxCell id="0"/>
                <mxCell id="1" parent="0"/>

 * An [MappedRange.InlineDelta] must be a mapping from a single code-point to a single code-point with a difference
 * that can be represented in 2^18-1.
 */
internal fun inlineDeltaOrNull(mapping: Mapping): MappedRange.InlineDelta? {
  if (mapping.hasSingleSourceCodePoint) {
    val sourceCodePoint = mapping.sourceCodePoint0