* finder" implementation that might be used in a logging framework.
 */
public class LazyStackTraceBenchmark {
  @Param({"20", "200", "2000"})
  int stackDepth;

  @Param({"-1", "3", "15"})
  int breakAt;

  int recursionCount;

  private static final Object duh = new Object();

  @Param Mode mode;

  enum Mode {
    LAZY_STACK_TRACE {
      @Override

```

////

### Вызов исключений

Зависимости из dependencies могут вызывать исключения с помощью `raise`, как и обычные зависимости:

//// tab | Python 3.9+

```Python hl_lines="10  15"
{!> ../../docs_src/dependencies/tutorial006_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="9  14"
{!> ../../docs_src/dependencies/tutorial006_an.py!}
```

////

```

////

### Raise exceptions

These dependencies can `raise` exceptions, the same as normal dependencies:

//// tab | Python 3.9+

```Python hl_lines="10  15"
{!> ../../docs_src/dependencies/tutorial006_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="9  14"
{!> ../../docs_src/dependencies/tutorial006_an.py!}
```

////

                ("files", ("test.txt", file)),
                ("files", ("test2.txt", file2)),
            ),
        )
    assert response.status_code == 200, response.text
    assert response.json() == {"file_sizes": [14, 15]}


def test_post_upload_file(tmp_path):
    path = tmp_path / "test.txt"
    path.write_bytes(b"<file content>")
    path2 = tmp_path / "test2.txt"
    path2.write_bytes(b"<file content2>")

They would be associated to the same "form field" sent using "form data".

To use that, declare a list of `bytes` or `UploadFile`:

//// tab | Python 3.9+

```Python hl_lines="10  15"
{!> ../../docs_src/request_files/tutorial002_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="11  16"
{!> ../../docs_src/request_files/tutorial002_an.py!}
```

////

                ("files", ("test.txt", file)),
                ("files", ("test2.txt", file2)),
            ),
        )
    assert response.status_code == 200, response.text
    assert response.json() == {"file_sizes": [14, 15]}


@needs_py39
def test_post_upload_file(tmp_path, app: FastAPI):
    path = tmp_path / "test.txt"
    path.write_bytes(b"<file content>")
    path2 = tmp_path / "test2.txt"

Теперь мы можем изменить зависимость `common_parameters`, указанную выше, на класс `CommonQueryParams`:

//// tab | Python 3.10+

```Python hl_lines="11-15"
{!> ../../docs_src/dependencies/tutorial002_an_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="11-15"
{!> ../../docs_src/dependencies/tutorial002_an_py39.py!}
```

////

//// tab | Python 3.6+

```Python hl_lines="12-16"

```

////

//// tab | Python 3.9+

```Python hl_lines="11-14"
{!> ../../docs_src/body_fields/tutorial001_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="12-15"
{!> ../../docs_src/body_fields/tutorial001_an.py!}
```

////

//// tab | Python 3.10+ non-Annotated

/// tip

Варто користуватись `Annotated` версією, якщо це можливо..

///

```Python hl_lines="6  11"
{!> ../../docs_src/dependencies/tutorial006.py!}
```

////

### 오류 발생시키기

다음 의존성은 기존 의존성과 동일하게 예외를 `raise`를 일으킬 수 있습니다:

//// tab | Python 3.9+

```Python hl_lines="10  15"
{!> ../../docs_src/dependencies/tutorial006_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="9  14"
{!> ../../docs_src/dependencies/tutorial006_an.py!}
```

////

## Faites appel à `uvicorn`

Dans votre application FastAPI, importez et exécutez directement `uvicorn` :

{* ../../docs_src/debugging/tutorial001.py hl[1,15] *}

### À propos de `__name__ == "__main__"`

Le but principal de `__name__ == "__main__"` est d'avoir du code qui est exécuté lorsque votre fichier est appelé avec :

<div class="termy">

```console