You can later read more about other middlewares in the [Advanced User Guide: Advanced Middleware](../advanced/middleware.md){.internal-link target=_blank}.

# Concurrency and async / await

Details about the `async def` syntax for *path operation functions* and some background about asynchronous code, concurrency, and parallelism.

## In a hurry?

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

If you are using third party libraries that tell you to call them with `await`, like:

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

/// tip

💭 🌅 🔃 🔠 👔 📟 &amp; ❔ 📟 ⚫️❔, ✅ <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Status" class="external-link" target="_blank"><abbr title="Mozilla Developer Network">🏇</abbr> 🧾 🔃 🇺🇸🔍 👔 📟</a>.

///

## ⌨ 💭 📛

➡️ 👀 ⏮️ 🖼 🔄:

```Python hl_lines="6"
{!../../docs_src/response_status_code/tutorial001.py!}
```

`201` 👔 📟 "✍".

Das könnte man mit `openapi_extra` machen:

```Python hl_lines="20-37  39-40"
{!../../docs_src/path_operation_advanced_configuration/tutorial006.py!}
```

## Servidores ASGI

Vamos nos aprofundar um pouco mais em detalhes.

FastAPI utiliza um padrão para construir frameworks e servidores web em Python chamado <abbr title="Asynchronous Server Gateway Interface">ASGI</abbr>. FastAPI é um framework web ASGI.

Se você quiser ler mais sobre essas codificações e campos de formulário, vá para a <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST" class="external-link" target="_blank"><abbr title="Mozilla Developer Network">MDN</abbr> web docs para <code>POST</code></a>.

///

/// warning | Aviso

stockage.

Il a été créé pour générer le HTML en backend, pas pour créer des API consommées par un frontend moderne (comme React, Vue.js et Angular) ou par d'autres systèmes (comme les appareils <abbr title="Internet of Things">IoT</abbr>) communiquant avec lui.

### <a href="https://www.django-rest-framework.org/" class="external-link" target="_blank">Django REST Framework</a>

    * 📤 **⚗** 👉, 👐.
* 📤 **↔** **🤝** 🛠️ (1️⃣ 🚚 🔐 🕸 🎚, ⏭ 🇺🇸🔍) 🤙 **<a href="https://en.wikipedia.org/wiki/Server_Name_Indication" class="external-link" target="_blank"><abbr title="Server Name Indication">👲</abbr></a>**.
    * 👉 👲 ↔ ✔ 1️⃣ 👁 💽 (⏮️ **👁 📢 📢**) ✔️ **📚 🇺🇸🔍 📄** &amp; 🍦 **💗 🇺🇸🔍 🆔/🈸**.
    * 👉 👷, **👁** 🦲 (📋) 🏃 🔛 💽, 👂 🔛 **📢 📢 📢**, 🔜 ✔️ **🌐 🇺🇸🔍 📄** 💽.

# Introduction aux Types Python

Python supporte des annotations de type (ou *type hints*) optionnelles.

Ces annotations de type constituent une syntaxe spéciale qui permet de déclarer le <abbr title="par exemple : str, int, float, bool">type</abbr> d'une variable.

En déclarant les types de vos variables, cela permet aux différents outils comme les éditeurs de texte d'offrir un meilleur support.

{!../../docs_src/middleware/tutorial001.py!}
```

## 其他中间件

你可以稍后在 [Advanced User Guide: Advanced Middleware](../advanced/middleware.md){.internal-link target=_blank}阅读更多关于中间件的教程.