但是 Python 有一种特定的方法来声明具有子类型的列表：

### 从 typing 导入 `List`

首先，从 Python 的标准库 `typing` 模块中导入 `List`：

```Python hl_lines="1"
{!> ../../docs_src/body_nested_models/tutorial002.py!}
```

### 声明具有子类型的 List

要声明具有子类型的类型，例如 `list`、`dict`、`tuple`：

* 从 `typing` 模块导入它们
* 使用方括号 `[` 和 `]` 将子类型作为「类型参数」传入

```Python
from typing import List

my_list: List[str]
```

这完全是用于类型声明的标准 Python 语法。

        this.params = params;
    }

    @Override
    public void execute(ViolationCheckContext context) {
        List<UpgradedProperty> currentUpgradedProperties = UpgradedProperties.parse(params.get(CURRENT_UPGRADED_PROPERTIES_KEY));
        List<UpgradedProperty> baselineUpgradedProperties = UpgradedProperties.parse(params.get(BASELINE_UPGRADED_PROPERTIES_KEY));

    protected int crawlerPriority = Thread.NORM_PRIORITY;

    protected final List<Crawler> crawlerList = Collections.synchronizedList(new ArrayList<>());

    public void crawl(final String sessionId, final List<String> webConfigIdList, final List<String> fileConfigIdList) {
        final boolean runAll = webConfigIdList == null && fileConfigIdList == null;
        final List<WebConfig> webConfigList;
        if (runAll || webConfigIdList != null) {

        }

        return parser;
    }

    protected String getBaseHref(final Document document) {
        try {
            final XPathNodes list = getXPathAPI().selectNodeList(document, "//BASE");
            if (list.size() > 0) {
                final Node node = list.get(0);
                final Node attrNode = node.getAttributes().getNamedItem("href");
                if (attrNode != null) {

### Importe `List` do typing

Primeiramente, importe `List` do módulo `typing` que já vem por padrão no Python:

```Python hl_lines="1"
{!../../docs_src/body_nested_models/tutorial002.py!}
```

### Declare a `List` com um parâmetro de tipo

Para declarar tipos que têm parâmetros de tipo(tipos internos), como `list`, `dict`, `tuple`:

* Importe os do modulo `typing`

      .build()

  /**
   * The protocols the client supports. This method always returns a non-null list that
   * contains minimally [Protocol.HTTP_1_1].
   */
  @get:JvmName("protocols")
  val protocols: List<Protocol> = protocols.toImmutableList()

  @get:JvmName("connectionSpecs")
  val connectionSpecs: List<ConnectionSpec> =
    connectionSpecs.toImmutableList()

  @JvmName("-deprecated_url")
  @Deprecated(

message NetworkPolicyEgressRule {
  // ports is a list of destination ports for outgoing traffic.
  // Each item in this list is combined using a logical OR. If this field is
  // empty or missing, this rule matches all ports (traffic not restricted by port).
  // If this field is present and contains at least one item, then this rule allows
  // traffic only if the traffic matches at least one port in the list.
  // +optional

    /**
     * Method getLifecycles.
     *
     * @return List
     */
    public java.util.List<Lifecycle> getLifecycles() {
        if (this.lifecycles == null) {
            this.lifecycles = new java.util.ArrayList<Lifecycle>();
        }

        return this.lifecycles;
    } // -- java.util.List<Lifecycle> getLifecycles()

    /**
     * Get the modelEncoding field.
     *

from .utils import needs_py310


@needs_py310
def test_typing():
    types = {
        list[int]: [1, 2, 3],
        dict[str, list[int]]: {"a": [1, 2, 3], "b": [4, 5, 6]},
        set[int]: [1, 2, 3],  # `set` is converted to `list`
        tuple[int, ...]: [1, 2, 3],  # `tuple` is converted to `list`
    }
    for test_type, expect in types.items():
        app = FastAPI()

    @Nonnull
    RemoteRepository createRemote(@Nonnull Repository repository);

    @Nonnull
    List<RemoteRepository> aggregate(
            @Nonnull Session session,
            @Nonnull List<RemoteRepository> dominant,
            @Nonnull List<RemoteRepository> recessive,
            boolean processRecessive);