### 编写自己的异步代码

Starlette （和 **FastAPI**） 是基于 <a href="https://anyio.readthedocs.io/en/stable/" class="external-link" target="_blank">AnyIO</a> 实现的，这使得它们可以兼容 Python 的标准库 <a href="https://docs.python.org/3/library/asyncio-task.html" class="external-link" target="_blank">asyncio</a> 和 <a href="https://trio.readthedocs.io/en/stable/" class="external-link" target="_blank">Trio</a>。

<a href="info.html">INFO</a>...

`directory="static"` 🔗 📛 📁 👈 🔌 👆 🎻 📁.

`name="static"` 🤝 ⚫️ 📛 👈 💪 ⚙️ 🔘 **FastAPI**.

🌐 👫 🔢 💪 🎏 🌘 "`static`", 🔆 👫 ⏮️ 💪 & 🎯 ℹ 👆 👍 🈸.

## 🌅 ℹ

Você pode definir arquivos e campos de formulário ao mesmo tempo usando `File` e `Form`.

/// info | "Informação"

Para receber arquivos carregados e/ou dados de formulário, primeiro instale <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>.

Por exemplo: `pip install python-multipart`.

///

## Importe `File` e `Form`

```Python hl_lines="1"

	<c:if test="${crudMode == null}">
		<li class="breadcrumb-item active"><la:message key="labels.crud_link_list" /></li>
	</c:if>
	<c:if test="${crudMode != null}">
		<li class="breadcrumb-item"><la:link href="../list">
				<la:message key="labels.crud_link_list" />
			</la:link></li>
	</c:if>
	<c:if test="${crudMode == 1}">
		<li class="breadcrumb-item active"><la:message key="labels.crud_link_create" /></li>
	</c:if>

FastAPI에서 `BackgroundTask`를 단독으로 사용하는 것은 여전히 가능합니다. 하지만 객체를 코드에서 생성하고, 이 객체를 포함하는 Starlette `Response`를 반환해야 합니다.

<a href="https://www.starlette.io/background/" class="external-link" target="_blank">`Starlette의 공식 문서`</a>에서 백그라운드 작업에 대한 자세한 내용을 확인할 수 있습니다.

## 경고

만약 무거운 백그라운드 작업을 수행해야하고 동일한 프로세스에서 실행할 필요가 없는 경우 (예: 메모리, 변수 등을 공유할 필요가 없음) <a href="https://docs.celeryq.dev" class="external-link" target="_blank">`Celery`</a>와 같은 큰 도구를 사용하면 도움이 될 수 있습니다.

```Python hl_lines="6"
{!../../docs_src/python_types/tutorial010.py!}
```

И снова вы получаете полную поддержку редактора:

<img src="/img/python-types/image06.png">

## Pydantic-модели

<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> является Python-библиотекой для выполнения валидации данных.

Вы объявляете «форму» данных как классы с атрибутами.

И каждый атрибут имеет тип.

Je kunt bijvoorbeeld een bestand `main.py` hebben met:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip

Het tweede argument van <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> is de standaardwaarde die wordt geretourneerd.

For example you could have a file `main.py` with:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip

The second argument to <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> is the default value to return.

///

The `status_code` parameter receives a number with the HTTP status code.

/// info

`status_code` can alternatively also receive an `IntEnum`, such as Python's <a href="https://docs.python.org/3/library/http.html#http.HTTPStatus" class="external-link" target="_blank">`http.HTTPStatus`</a>.

///

It will:

* Return that status code in the response.