* ...entro outros.

////

### Classes como tipos

Você também pode declarar uma classe como o tipo de uma variável.

Digamos que você tenha uma classe `Person`, com um nome:

```Python hl_lines="1-3"
{!../../docs_src/python_types/tutorial010.py!}
```

Então você pode declarar que uma variável é do tipo `Person`:

```Python hl_lines="6"
{!../../docs_src/python_types/tutorial010.py!}
```

Go 1.22 disabled
[`ConnectionState.ExportKeyingMaterial`](/pkg/crypto/tls/#ConnectionState.ExportKeyingMaterial)
when the connection supports neither TLS 1.3 nor Extended Master Secret
(implemented in Go 1.21). It can be reenabled with the [`tlsunsafeekm`
setting](/pkg/crypto/tls/#ConnectionState.ExportKeyingMaterial).

    // @JvmField val TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256 = init("TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256", 0xccae)

    // TLS 1.3 https://tools.ietf.org/html/rfc8446
    @JvmField val TLS_AES_128_GCM_SHA256 = init("TLS_AES_128_GCM_SHA256", 0x1301)

    @JvmField val TLS_AES_256_GCM_SHA384 = init("TLS_AES_256_GCM_SHA384", 0x1302)

Você pode criar as *operações de rotas* para esse módulo usando o `APIRouter`.

### Importar `APIRouter`

você o importa e cria uma "instância" da mesma maneira que faria com a classe `FastAPI`:

```Python hl_lines="1  3" title="app/routers/users.py"
{!../../docs_src/bigger_applications/app/routers/users.py!}
```

### *Operações de Rota* com `APIRouter`

E então você o utiliza para declarar suas *operações de rota*.

  optional SupplementalGroupsStrategyOptions supplementalGroups = 12;

  // fsGroup is the strategy that will dictate what fs group is used by the SecurityContext.
  optional FSGroupStrategyOptions fsGroup = 13;

  // readOnlyRootFilesystem when set to true will force containers to run with a read only root file
  // system.  If the container specifically requests to run with a non-read only root file system

    name: minio
    sources:
    - https://github.com/minio/minio
    urls:
    - https://charts.min.io/helm-releases/minio-5.0.14.tgz
    version: 5.0.14
  - apiVersion: v1
    appVersion: RELEASE.2023-07-07T07-13-57Z
    created: "2024-10-11T14:15:09.775105412+02:00"
    description: Multi-Cloud Object Storage
    digest: 3c18f7381efe6d86497f952e6d5f59003ee5a009c54778ddea1ee8d3c7bed9c8
    home: https://min.io

* ...এবং অন্যান্য।

////

### ক্লাস হিসেবে টাইপস

আপনি একটি ভেরিয়েবলের টাইপ হিসেবে একটি ক্লাস ঘোষণা করতে পারেন।

ধরুন আপনার কাছে `Person` নামে একটি ক্লাস আছে, যার একটি নাম আছে:

```Python hl_lines="1-3"
{!../../docs_src/python_types/tutorial010.py!}
```

তারপর আপনি একটি ভেরিয়েবলকে `Person` টাইপের হিসেবে ঘোষণা করতে পারেন:

```Python hl_lines="6"
{!../../docs_src/python_types/tutorial010.py!}
```

  private static final String E12 = "1-2";
  private static final String E12_A = "1-2a";
  private static final String E12_B = "1-2b";
  private static final String E21 = "2-1";
  private static final String E13 = "1-3";
  private static final String E31 = "3-1";
  private static final String E34 = "3-4";
  private static final String E44 = "4-4";
  private static final int NODE_COUNT = 20;
  private static final int EDGE_COUNT = 20;

      "datasource": {
        "type": "prometheus",
        "uid": "${datasource}"
      },
      "gridPos": {
        "h": 1,
        "w": 24,
        "x": 0,
        "y": 16
      },
      "id": 13,
      "panels": [],
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${datasource}"
          },
          "refId": "A"
        }

```console
$ pip install sqlalchemy

---> 100%
```

</div>

## 创建 SQLAlchemy 部件

让我们转到文件`sql_app/database.py`。

### 导入 SQLAlchemy 部件

```Python hl_lines="1-3"
{!../../docs_src/sql_databases/sql_app/database.py!}
```

### 为 SQLAlchemy 定义数据库 URL地址

```Python hl_lines="5-6"
{!../../docs_src/sql_databases/sql_app/database.py!}
```