</mxCell>
                <mxCell id="56" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;strokeWidth=3;" edge="1" parent="1" source="55" target="49">
                    <mxGeometry relative="1" as="geometry"/>
                </mxCell>

	_ = x[HandlerGetNetInfo-49]
	_ = x[HandlerGetCPUs-50]
	_ = x[HandlerServerInfo-51]
	_ = x[HandlerGetSysConfig-52]
	_ = x[HandlerGetSysServices-53]
	_ = x[HandlerGetSysErrors-54]
	_ = x[HandlerGetAllBucketStats-55]
	_ = x[HandlerGetBucketStats-56]
	_ = x[HandlerGetSRMetrics-57]
	_ = x[HandlerGetPeerMetrics-58]
	_ = x[HandlerGetMetacacheListing-59]
	_ = x[HandlerUpdateMetacacheListing-60]
	_ = x[HandlerGetPeerBucketMetrics-61]

  }

  // Hardcoded because of Android problems. See testUtf16Expected.
  private static final byte[] utf16ExpectedWithBom =
      new byte[] {-2, -1, 0, 114, 0, -55, 0, 115, 0, 117, 0, 109, 0, -55};

  public void testNewDataOutput_writeChars() {
    ByteArrayDataOutput out = ByteStreams.newDataOutput();
    out.writeChars("r\u00C9sum\u00C9");
    // need to remove byte order mark before comparing

    public void test_getLanguageItems() {
        final List<Map<String, String>> enItems = systemHelper.getLanguageItems(Locale.ENGLISH);
        assertEquals(55, enItems.size());
        final List<Map<String, String>> jaItems = systemHelper.getLanguageItems(Locale.JAPANESE);
        assertEquals(55, jaItems.size());
    }

    public void test_getHostnamet() {
        assertNotNull(systemHelper.getHostname());
        try {

 *
 * signed by intermediate certificate:
 *
 * Common Name: Entrust Certification Authority - L1M
 * Subject Alternative Names: none
 * Validity: 2014-12-15T15:25:03Z – 2030-10-15T15:55:03Z
 * Public Key: d081c13923c2b1d1ecf757dd55243691202248f7fcca520ab0ab3f33b5b08407f6df4e7ab0fb9822...
 * Signature: b487c784221a29c0a478ecf54f1bb484976f77eed4cf59afa843962f1d58dea6f3155b2ed9439c4c4...
 *

3389229,2,2014-03-07 09:46:32,2014-03-07 09:55:01,N,1,-73.952301025390625,40.789798736572266,-73.935806274414062,40.794448852539063,1,1.67,8,0,0.5,2,0,,,10.5,1,1,75,74,green,0.00,3.9,0.0,37,26,7.83,1267,168,1,Manhattan,016800,1016800,E,MN33,East Harlem South,3804,1553,178,1,Manhattan,017800,1017800,E,MN34,East...

        Subject: CN = consoleAdmin
        Subject Public Key Info:
            Public Key Algorithm: ED25519
                ED25519 Public-Key:
                pub:
                    5a:91:87:b8:77:fe:d4:af:d9:c7:c7:ce:55:ae:74:
                    aa:f3:f1:fe:04:63:9b:cb:20:97:61:97:90:94:fa:
                    12:8b
        X509v3 extensions:
            X509v3 Key Usage: critical
                Digital Signature

  }

  // Hardcoded because of Android problems. See testUtf16Expected.
  private static final byte[] utf16ExpectedWithBom =
      new byte[] {-2, -1, 0, 114, 0, -55, 0, 115, 0, 117, 0, 109, 0, -55};

  public void testNewDataOutput_writeChars() {
    ByteArrayDataOutput out = ByteStreams.newDataOutput();
    out.writeChars("r\u00C9sum\u00C9");
    // need to remove byte order mark before comparing

* ✍ 👆 `FastAPI` 🈸.
* ✍ 🎉 🐕‍🦺 🔗 & 🔌 ⚪️➡️ 💽.

```Python hl_lines="42  45-47  50-52"
{!../../../docs_src/async_sql_databases/tutorial001.py!}
```

## ✍ 🗒

✍ *➡ 🛠️ 🔢* ✍ 🗒:

```Python hl_lines="55-58"
{!../../../docs_src/async_sql_databases/tutorial001.py!}
```

!!! Note
    👀 👈 👥 🔗 ⏮️ 💽 ⚙️ `await`, *➡ 🛠️ 🔢* 📣 ⏮️ `async`.

### 👀 `response_model=List[Note]`

⚫️ ⚙️ `typing.List`.

## 连接与断开

* 创建 `FastAPI` 应用
* 创建事件处理器，执行数据库连接与断开操作

```Python hl_lines="42  45-47  50-52"
{!../../../docs_src/async_sql_databases/tutorial001.py!}
```

## 读取笔记

创建读取笔记的*路径操作函数*：

```Python hl_lines="55-58"
{!../../../docs_src/async_sql_databases/tutorial001.py!}
```

!!! Note "笔记"

    注意，本例与数据库通信时使用 `await`，因此*路径操作函数*要声明为异步函数（`asnyc`）。

### 注意 `response_model=List[Note]`