{* ../../docs_src/first_steps/tutorial003_py310.py hl[7] *}

/// note | Not

Eğer farkı bilmiyorsanız, [Async: *"Aceleniz mi var?"*](../async.md#in-a-hurry) sayfasına bakın.

///

### Adım 5: içeriği döndürün { #step-5-return-the-content }

{* ../../docs_src/first_steps/tutorial001_py310.py hl[8] *}

import org.jspecify.annotations.Nullable;

/**
 * Useful suppliers.
 *
 * <p>All methods return serializable suppliers as long as they're given serializable parameters.
 *
 * @author Laurence Gonsalves
 * @author Harry Heymann
 * @since 2.0
 */
@GwtCompatible
public final class Suppliers {
  private Suppliers() {}

  /**
   * Returns a new supplier which is the composition of the provided function and supplier. In other

Détails sur la syntaxe `async def` pour les *fonctions de chemin d'accès* et quelques rappels sur le code asynchrone, la concurrence et le parallélisme.

## Vous êtes pressés ? { #in-a-hurry }

<abbr title="too long; didn't read - trop long ; pas lu"><strong>TL;DR :</strong></abbr>

Si vous utilisez des bibliothèques tierces qui nécessitent d'être appelées avec `await`, telles que :

```Python

{* ../../docs_src/first_steps/tutorial003_py310.py hl[7] *}

/// note | Примечание

Если вы не знаете, в чём разница, посмотрите [Асинхронность: *"Нет времени?"*](../async.md#in-a-hurry).

///

### Шаг 5: верните содержимое { #step-5-return-the-content }

{* ../../docs_src/first_steps/tutorial001_py310.py hl[8] *}

Вы можете вернуть `dict`, `list`, отдельные значения `str`, `int` и т.д.

{* ../../docs_src/first_steps/tutorial003_py310.py hl[7] *}

/// note | Hinweis

Wenn Sie den Unterschied nicht kennen, lesen Sie [Async: *„In Eile?“*](../async.md#in-a-hurry).

///

### Schritt 5: den Inhalt zurückgeben { #step-5-return-the-content }

{* ../../docs_src/first_steps/tutorial001_py310.py hl[8] *}

Detalles sobre la sintaxis `async def` para *path operation functions* y algunos antecedentes sobre el código asíncrono, la concurrencia y el paralelismo.

## ¿Con prisa? { #in-a-hurry }

<abbr title="too long; didn't read - demasiado largo; no lo leí"><strong>TL;DR:</strong></abbr>

Si estás usando paquetes de terceros que te dicen que los llames con `await`, como:

```Python

@app.get("/items/{item_id}")
async def read_item(item_id: int, q: str | None = None):
    return {"item_id": item_id, "q": q}
```

**注**:

わからない場合は、_「In a hurry?」_ セクションの [ドキュメントの `async` と `await`](https://fastapi.tiangolo.com/ja/async/#in-a-hurry) を確認してください。

</details>

### 実行 { #run-it }

以下のコマンドでサーバーを起動します。

<div class="termy">

```console
$ fastapi dev

# About HTTPS { #about-https }

It is easy to assume that HTTPS is something that is just "enabled" or not.

But it is way more complex than that.

/// tip

If you are in a hurry or don't care, continue with the next sections for step by step instructions to set everything up with different techniques.

///

To **learn the basics of HTTPS**, from a consumer perspective, check [https://howhttps.works/](https://howhttps.works/).

    sequences.add(new StringBuilder("henry"));
    sequences.add(new StringBuilder("apple"));
    sequences.add("lemon");

    assertEquals(3, Iterables.indexOf(sequences, STARTSWITH_A));
  }

  public void testIndexOf_genericPredicate2() {
    List<String> sequences = Lists.newArrayList("bob", "charlie", "henry", "apple", "lemon");

# 並行與 async / await { #concurrency-and-async-await }

有關*路徑操作函式*的 `async def` 語法的細節與非同步 (asynchronous) 程式碼、並行 (concurrency) 與平行 (parallelism) 的一些背景知識。

## 趕時間嗎? { #in-a-hurry }

<abbr title="too long; didn't read - 太長不看"><strong>TL;DR:</strong></abbr>

如果你正在使用要求你以 `await` 語法呼叫的第三方函式庫，例如：

```Python
results = await some_library()
```

然後，使用 `async def` 宣告你的*路徑操作函式*：


```Python hl_lines="2"
@app.get('/')