func (set TargetIDSet) Difference(sset TargetIDSet) TargetIDSet {
	nset := NewTargetIDSet()
	for k := range set {
		if _, ok := sset[k]; !ok {
			nset.add(k)
		}
	}

	return nset
}

// NewTargetIDSet - creates new TargetID set with given TargetIDs.
func NewTargetIDSet(targetIDs ...TargetID) TargetIDSet {
	set := make(TargetIDSet)
	for _, targetID := range targetIDs {
		set.add(targetID)
	}
	return set

   *         .build();
   * }
   *
   * <p>Builder instances can be reused; it is safe to call {@link #build} multiple times to build
   * multiple graphs in series. Each new graph contains all the elements of the ones created before
   * it.
   *
   * @since 28.0
   */
  public static class Builder<N, V> {

    private final MutableValueGraph<N, V> mutableValueGraph;

    Builder(ValueGraphBuilder<N, V> graphBuilder) {

    }

    @Provides
    @Typed(ToolchainFactory.class)
    @Named("jdk")
    ToolchainFactory jdkFactory() {
        return createV3FactoryBridge("jdk");
    }

    /**
     * Creates a v3 ToolchainFactory bridge that wraps a v4 ToolchainFactory.
     */
    public ToolchainFactory createV3FactoryBridge(String type) {
        try {
            org.apache.maven.api.services.ToolchainFactory v4Factory =

                buildReportTab("Performance", "performance-test-results.zip!report/index.html")
            }
        }

        specificBuildTypes =
            stage.specificBuilds.map {
                it.create(model, stage, FlakyTestStrategy.EXCLUDE)
            }

        val (smokeBuildTypes, nonSmokeBuildTypes) =
            stage.specificBuilds.zip(specificBuildTypes).partition { (spec, _) ->

---

## Install FastAPI { #install-fastapi }

The first step is to install FastAPI.

Make sure you create a [virtual environment](../virtual-environments.md), activate it, and then **install FastAPI**:

<div class="termy">

```console
$ pip install "fastapi[standard]"

---> 100%
```

</div>

/// note

{* ../../docs_src/background_tasks/tutorial001_py310.py hl[1,13] *}

**FastAPI** créera l'objet de type `BackgroundTasks` pour vous et le passera comme paramètre.

## Créer une fonction de tâche { #create-a-task-function }

Créez une fonction à exécuter comme tâche d'arrière-plan.

Une fonction à exécuter comme tâche d'arrière-plan est juste une fonction standard qui peut recevoir des paramètres.

Mas é a maneira mais simples de focar no lado do servidor de WebSockets e ter um exemplo funcional:

{* ../../docs_src/websockets_/tutorial001_py310.py hl[2,6:38,41:43] *}

## Crie um `websocket` { #create-a-websocket }

Em sua aplicação **FastAPI**, crie um `websocket`:

{* ../../docs_src/websockets_/tutorial001_py310.py hl[1,46:47] *}

/// note | Detalhes Técnicos

- 可以對該**回應**做一些處理或執行所需的程式碼。
- 然後回傳**回應**。

/// note | 技術細節

如果你有使用帶有 `yield` 的相依性，其釋放階段的程式碼會在中介軟體之後執行。

若有背景工作（在[背景工作](background-tasks.md)一節會介紹，你稍後會看到），它們會在所有中介軟體之後執行。

///

## 建立中介軟體 { #create-a-middleware }

要建立中介軟體，將裝飾器 `@app.middleware("http")` 加在函式上方。

中介軟體函式會接收：

- `request`。
- 一個函式 `call_next`，會以 `request` 作為參數。
    - 這個函式會把 `request` 傳給對應的*路徑操作*。
    - 然後回傳對應*路徑操作*所產生的 `response`。

  }

  /**
   * Returns a hash function implementing the Message Authentication Code (MAC) algorithm, using the
   * MD5 (128 hash bits) hash function and a {@link SecretKeySpec} created from the given byte array
   * and the MD5 algorithm.
   *
   * <p>If you are designing a new system that needs HMAC, prefer {@link #hmacSha256} or other
   * future-proof algorithms <a

     */
    @Required
    public MultipartFormFile elevateWordFile;

    /**
     * Default constructor for UploadForm.
     * Creates a new instance with default values.
     */
    public UploadForm() {
        // Default constructor
    }