{* ../../docs_src/background_tasks/tutorial001.py hl[6:9] *}

## Ajouter une tâche d'arrière-plan

Dans votre *fonction de chemin*, passez votre fonction de tâche à l'objet de type `BackgroundTasks` (`background_tasks` ici) grâce à la méthode `.add_task()` :


{* ../../docs_src/background_tasks/tutorial001.py hl[14] *}

`.add_task()` reçoit comme arguments :

* Une fonction de tâche à exécuter en arrière-plan (`write_notification`).

### 🚚 `root_path`

🏆 👉, 👆 💪 ⚙️ 📋 ⏸ 🎛 `--root-path` 💖:

<div class="termy">

```console
$ uvicorn main:app --root-path /api/v1

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

🚥 👆 ⚙️ Hypercorn, ⚫️ ✔️ 🎛 `--root-path`.

/// note | "📡 ℹ"

🔫 🔧 🔬 `root_path` 👉 ⚙️ 💼.

<div class="termy">

```console
$ python ./scripts/docs.py live

<span style="color: green;">[INFO]</span> Serving on http://127.0.0.1:8008
<span style="color: green;">[INFO]</span> Start watching changes
<span style="color: green;">[INFO]</span> Start detecting changes
```

</div>

Il servira la documentation sur `http://127.0.0.1:8008`.

## Tente você mesmo

Se seu arquivo for nomeado `main.py`, execute sua aplicação com:

<div class="termy">

```console
$ fastapi dev main.py

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

Abra seu navegador em: <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>.

    /**
     * <a href="https://en.wikipedia.org/wiki/ANSI_escape_code#Colors">ANSI 8 colors</a> for fluent API
     */
    public enum Color {
        BLACK(0, "BLACK"),
        RED(1, "RED"),
        GREEN(2, "GREEN"),
        YELLOW(3, "YELLOW"),
        BLUE(4, "BLUE"),
        MAGENTA(5, "MAGENTA"),
        CYAN(6, "CYAN"),
        WHITE(7, "WHITE"),
        DEFAULT(9, "DEFAULT");

        private final int value;

        uses: actions/upload-artifact@v4
        with:
          name: coverage-html
          path: htmlcov
          include-hidden-files: true

  # https://github.com/marketplace/actions/alls-green#why
  check:  # This job does nothing and is only used for the branch protection
    if: always()
    needs:
      - coverage-combine
    runs-on: ubuntu-latest
    steps:
      - name: Dump GitHub context

        in response.content
    )
    response = client.get("/static/styles.css")
    assert response.status_code == 200, response.text
    assert b"color: green;" in response.content
    shutil.rmtree("./templates")

### Fornecendo o `root_path`

Para conseguir isso, você pode usar a opção de linha de comando `--root-path` assim:

<div class="termy">

```console
$ fastapi run main.py --root-path /api/v1

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

Se você usar Hypercorn, ele também tem a opção `--root-path`.

/// note | "Detalhes Técnicos"

5,255,255,.8)}.bg-gradient-green>.card-header .btn-tool:hover,.bg-green>.card-header .btn-tool:hover,.card-green:not(.card-outline)>.card-header .btn-tool:hover{color:#fff}.card.bg-gradient-green .bootstrap-datetimepicker-widget .table td,.card.bg-gradient-green .bootstrap-datetimepicker-widget .table th,.card.bg-green .bootstrap-datetimepicker-widget .table td,.card.bg-green .bootstrap-datetimepicker-widget .table th{border:none}.card.bg-gradient-green .bootstrap-datetimepicker-widget table td....

rootdir: /home/user/code/superawesome-cli/app
plugins: forked-1.1.3, xdist-1.31.0, cov-2.8.1
collected 6 items

---> 100%

test_main.py <span style="color: green; white-space: pre;">......                            [100%]</span>

<span style="color: green;">================= 1 passed in 0.03s =================</span>
```