@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):
    return {"item_name": item.name, "item_id": item_id}
```

De `fastapi dev` server zou automatisch moeten herladen.

### Interactieve API documentatie upgrade

Ga nu naar <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

## FastAPI ⚒

**FastAPI** 🤝 👆 📄:

### ⚓️ 🔛 📂 🐩

* <a href="https://github.com/OAI/OpenAPI-Specification" class="external-link" target="_blank"><strong>🗄</strong></a> 🛠️ 🏗, ✅ 📄 <abbr title="also known as: endpoints, routes">➡</abbr> <abbr title="also known as HTTP methods, as POST, GET, PUT, DELETE">🛠️</abbr>, 🔢, 💪 📨, 💂‍♂, ♒️.

    if (requestSendStarted && requestIsOneShot(e, userRequest)) return false

    // This exception is fatal.
    if (!isRecoverable(e, requestSendStarted)) return false

    // No more routes to attempt.
    if (!call.retryAfterFailure()) return false

    // For failure recovery, use the same route selector with a new connection.
    return true
  }

  private fun requestIsOneShot(

    misleading; it was always used to configure redirects between `https://` and
    `http://` schemes.

 *  **RouteDatabase is no longer public API.** OkHttp continues to track which
    routes have failed but this is no exposed in the API.

 *  **ResponseSource is gone.** This enum exposed whether a response came from
    the cache, network, or both. OkHttp 2 offers more detail with raw access to

And `items.router` contains the `APIRouter` inside of the file `app/routers/items.py`.

///

With `app.include_router()` we can add each `APIRouter` to the main `FastAPI` application.

It will include all the routes from that router as part of it.

/// note | Technical Details

It will actually internally create a *path operation* for each *path operation* that was declared in the `APIRouter`.

Und Abhängigkeiten können auf sehr einfache und intuitive Weise erstellt werden, sodass Sie einfach die benötigten Python-Packages importieren und sie in wenigen Codezeilen, *im wahrsten Sinne des Wortes*, mit Ihren API-Funktionen integrieren.

Beispiele hierfür finden Sie in den nächsten Kapiteln zu relationalen und NoSQL-Datenbanken, Sicherheit usw.

## **FastAPI**-Kompatibilität

### Açık standartları temel alır

* API oluşturma işlemlerinde <a href="https://github.com/OAI/OpenAPI-Specification" class="external-link" target="_blank"><strong>OpenAPI</strong></a> buna <abbr title="also known as: endpoints, routes">path</abbr> <abbr title=" HTTP metodları olarak bilinen, POST, GET, PUT, DELETE">operasyonları </abbr>parametreleri, body talebi, güvenlik  gibi şeyler dahil olmak üzere deklare bunların deklare edilmesi.

### Oparcie o standardy open

* <a href="https://github.com/OAI/OpenAPI-Specification" class="external-link" target="_blank"><strong>OpenAPI</strong></a> do tworzenia API, w tym deklaracji <abbr title="znane również jako: paths, endpoints, routes">ścieżek</abbr> <abbr title="znane również jako metody HTTP, takie jak POST, GET, PUT, DELETE">operacji</abbr>, parametrów, <abbr title="po angielsku: body requests">ciał zapytań</abbr>, bezpieczeństwa, itp.

* <a href="https://github.com/OAI/OpenAPI-Specification" class="external-link" target="_blank"><strong>OpenAPI</strong></a> for API creation, including declarations of <abbr title="also known as: endpoints, routes">path</abbr> <abbr title="also known as HTTP methods, as POST, GET, PUT, DELETE">operations</abbr>, parameters, request bodies, security, etc.

Pour parler de tâches "synchrones" (en opposition à "asynchrones"), on utilise souvent le terme "séquentiel", car l'ordinateur / le programme va effectuer toutes les étapes d'une tâche séquentiellement avant de passer à une autre tâche, même si ces étapes impliquent de l'attente.

### Concurrence et Burgers