```

////

//// tab | Python 3.8+

```Python hl_lines="9  11  16"
{!> ../../docs_src/response_model/tutorial003.py!}
```

////

这样，即便我们的*路径操作函数*将会返回包含密码的相同输入用户：

//// tab | Python 3.10+

```Python hl_lines="24"
{!> ../../docs_src/response_model/tutorial003_py310.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="24"

```

////

//// tab | Python 3.9+

```Python hl_lines="68-69  82"
{!> ../../docs_src/websockets/tutorial002_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="69-70  83"
{!> ../../docs_src/websockets/tutorial002_an.py!}
```

////

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

/// tip

```

////

//// tab | Python 3.9+

```Python hl_lines="13  15  22  25"
{!> ../../docs_src/background_tasks/tutorial002_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="14  16  23  26"
{!> ../../docs_src/background_tasks/tutorial002_an.py!}
```

////

//// tab | Python 3.10+ nicht annotiert

/// tip | "Tipp"

您可以通过使用标准类型注解并将 None 作为默认值的方式将一个文件参数设为可选:

//// tab | Python 3.9+

```Python hl_lines="7  14"
{!> ../../docs_src/request_files/tutorial001_02_py310.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="9  17"
{!> ../../docs_src/request_files/tutorial001_02.py!}
```

////

## 带有额外元数据的 `UploadFile`

您也可以将 `File()` 与 `UploadFile` 一起使用，例如，设置额外的元数据:

Primeiro, importe `Path` de `fastapi`:

//// tab | Python 3.10+

```Python hl_lines="1"
{!> ../../docs_src/path_params_numeric_validations/tutorial001_py310.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="3"
{!> ../../docs_src/path_params_numeric_validations/tutorial001.py!}
```

////

## Declare metadados

Você pode declarar todos os parâmetros da mesma maneira que na `Query`.

Let's start with a simple FastAPI application:

//// tab | Python 3.9+

```Python hl_lines="7-9  12-13  16-17  21"
{!> ../../docs_src/generate_clients/tutorial001_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="9-11  14-15  18  19  23"
{!> ../../docs_src/generate_clients/tutorial001.py!}
```

////

```

////

//// tab | Python 3.8+

```Python hl_lines="14  16  23  26"
{!> ../../docs_src/background_tasks/tutorial002_an.py!}
```

////

//// tab | Python 3.10+ 没Annotated

/// tip

尽可能选择使用 `Annotated` 的版本。

///

```Python hl_lines="11  13  20  23"
{!> ../../docs_src/background_tasks/tutorial002_py310.py!}
```

////

//// tab | Python 3.8+ 没Annotated

/// tip

//// tab | Python 3.10+

```Python hl_lines="4  21"
{!> ../../docs_src/encoder/tutorial001_py310.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="5  22"
{!> ../../docs_src/encoder/tutorial001.py!}
```

////

У цьому прикладі вона конвертує Pydantic model у `dict`, а `datetime` у `str`.

```

////

//// tab | Python 3.8+

```Python
{!> ../../docs_src/app_testing/app_b_an/main.py!}
```

////

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

/// tip | "Dica"

Prefira usar a versão `Annotated` se possível.

///

```Python
{!> ../../docs_src/app_testing/app_b_py310/main.py!}
```

////

//// tab | Python 3.8+ non-Annotated

/// tip | "Dica"

```

////

//// tab | Python 3.8+

```Python
{!> ../../docs_src/app_testing/app_b_an/main.py!}
```

////

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

/// tip | "提示"

Prefer to use the `Annotated` version if possible.

///

```Python
{!> ../../docs_src/app_testing/app_b_py310/main.py!}
```

////

//// tab | Python 3.8+ non-Annotated

/// tip | "提示"