# Reference - Code API

Here's the reference or code API, the classes, functions, parameters, attributes, and
all the FastAPI parts you can use in your applications.

If you want to **learn FastAPI** you are much better off reading the

```Python
        ... "item_name": item.name ...
```

... vers :

```Python
        ... "item_price": item.price ...
```

... et voyez comment votre éditeur complétera automatiquement les attributs et connaîtra leurs types :

![compatibilité IDE](https://fastapi.tiangolo.com/img/vscode-completion.png)

* For `PUT` requests to `/items/{item_id}`, Read the body as JSON:
    * Check that it has a required attribute `name` that should be a `str`.
    * Check that it has a required attribute `price` that has to be a `float`.
    * Check that it has an optional attribute `is_offer`, that should be a `bool`, if present.
    * All this would also work for deeply nested JSON objects.

# Referenz – Code-API

Hier ist die Referenz oder Code-API, die Klassen, Funktionen, Parameter, Attribute und alle FastAPI-Teile, die Sie in Ihren Anwendungen verwenden können.

Wenn Sie **FastAPI** lernen möchten, ist es viel besser, das [FastAPI-Tutorial](https://fastapi.tiangolo.com/tutorial/) zu lesen.

!!! note "Hinweis Deutsche Übersetzung"

```

... von:

```Python
        ... "item_name": item.name ...
```

... zu:

```Python
        ... "item_price": item.price ...
```

... und sehen Sie, wie Ihr Editor die Attribute automatisch ausfüllt und ihre Typen kennt:

![Editor Unterstützung](https://fastapi.tiangolo.com/img/vscode-completion.png)