所以接收上传文件，要预先安装 <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>。

例如： `pip install python-multipart`。

///

## 导入 `File`

从 `fastapi` 导入 `File` 和 `UploadFile`：

```Python hl_lines="1"
{!../../docs_src/request_files/tutorial001.py!}
```

## 定义 `File` 参数

创建文件（`File`）参数的方式与 `Body` 和 `Form` 一样：

```Python hl_lines="7"

```Python
{!../../docs_src/sql_databases/sql_app/models.py!}
```

* `sql_app/schemas.py`:

//// tab | Python 3.10+

```Python
{!> ../../docs_src/sql_databases/sql_app_py310/schemas.py!}
```

////

//// tab | Python 3.9+

```Python
{!> ../../docs_src/sql_databases/sql_app_py39/schemas.py!}
```

////

//// tab | Python 3.8+

```Python

## Managing hermetic Python

To make sure that TensorFlow's build is reproducible, behaves uniformly across
supported platforms (Linux, Windows, MacOS) and is properly isolated from
specifics of a local system, we rely on hermetic Python (see
[rules_python](https://github.com/bazelbuild/rules_python)) for all build
and test commands executed via Bazel. This means that your system Python
installation will be ignored during the build and Python interpreter itself

## 分步概括

### 步骤 1：导入 `FastAPI`

```Python hl_lines="1"
{!../../docs_src/first_steps/tutorial001.py!}
```

`FastAPI` 是一个为你的 API 提供了所有功能的 Python 类。

/// note | "技术细节"

`FastAPI` 是直接从 `Starlette` 继承的类。

你可以通过 `FastAPI` 使用所有的 Starlette 的功能。

///

### 步骤 2：创建一个 `FastAPI`「实例」

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

### Virtuelle Umgebung mit `venv`

Sie können mit dem Python-Modul `venv` in einem Verzeichnis eine isolierte virtuelle lokale Umgebung erstellen. Machen wir das im geklonten Repository (da wo sich die `requirements.txt` befindet):

<div class="termy">

```console
$ python -m venv env
```

</div>

//// tab | 🐍 3️⃣.6️⃣ & 🔛

```Python hl_lines="3  17"
{!> ../../docs_src/path_operation_configuration/tutorial001.py!}
```

////

//// tab | 🐍 3️⃣.9️⃣ & 🔛

```Python hl_lines="3  17"
{!> ../../docs_src/path_operation_configuration/tutorial001_py39.py!}
```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="1  15"

# Yol Parametreleri

Yol "parametrelerini" veya "değişkenlerini" Python <abbr title="String Biçimleme: Format String">string biçimlemede</abbr> kullanılan sözdizimi ile tanımlayabilirsiniz.

```Python hl_lines="6-7"
{!../../docs_src/path_params/tutorial001.py!}
```

Yol parametresi olan `item_id`'nin değeri, fonksiyonunuza `item_id` argümanı olarak aktarılacaktır.

//// tab | Python 3.9+

```Python hl_lines="6  14  22"
{!> ../../docs_src/dependencies/tutorial008_an_py39.py!}
```

////

//// tab | Python 3.6+

```Python hl_lines="5  13  21"
{!> ../../docs_src/dependencies/tutorial008_an.py!}
```

////

//// tab | Python 3.6+ без Annotated

/// tip | "Подсказка"

/// info | "Informação"

Para usar formulários, primeiro instale <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>.

Ex: `pip install python-multipart`.

///

## Importe `Form`

Importe `Form` de `fastapi`:

```Python hl_lines="1"
{!../../docs_src/request_forms/tutorial001.py!}
```

## Declare parâmetros de `Form`

//// tab | 🐍 3️⃣.6️⃣ & 🔛

```Python hl_lines="30-35"
{!> ../../docs_src/body_updates/tutorial001.py!}
```

////

//// tab | 🐍 3️⃣.9️⃣ & 🔛

```Python hl_lines="30-35"
{!> ../../docs_src/body_updates/tutorial001_py39.py!}
```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="28-33"
{!> ../../docs_src/body_updates/tutorial001_py310.py!}
```