Or it might be the case that you just prefer to take other courses because they adapt better to your learning style.

Some course providers ✨ [**sponsor FastAPI**](../help-fastapi.md#sponsor-the-author){.internal-link target=_blank} ✨, this ensures the continued and healthy **development** of FastAPI and its **ecosystem**.

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"_Honestly, what you've built looks super solid and polished. In many ways, it's what I wanted **Hug** to be - it's really inspiring to see someone build that._"

* Etkileşimli API dokümantasyonu, yeni gövdede dahil olmak üzere otomatik olarak güncellenmiş olacak:

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* "Try it out" butonuna tıklayalım, bu işlem API parametleri üzerinde değişiklik yapmamıza ve doğrudan API ile etkileşime geçmemize imkan sağlayacak:

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-04-swagger-03.png)

* La documentation interactive de l'API sera automatiquement mise à jour, y compris le nouveau corps de la requête :

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* Cliquez sur le bouton "Try it out", il vous permet de renseigner les paramètres et d'interagir directement avec l'API :

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-04-swagger-03.png)

# Deployment

Deploying a **FastAPI** application is relatively easy.

## What Does Deployment Mean

To **deploy** an application means to perform the necessary steps to make it **available to the users**.

For a **web API**, it normally involves putting it in a **remote machine**, with a **server program** that provides good performance, stability, etc, so that your **users** can **access** the application efficiently and without interruptions or problems.

```

</div>

It is **HIGHLY encouraged** that you write or copy the code, edit it and run it locally.

Using it in your editor is what really shows you the benefits of FastAPI, seeing how little code you have to write, all the type checks, autocompletion, etc.

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## Install FastAPI

The first step is to install FastAPI.

For the tutorial, you might want to install it with all the optional dependencies and features:

* Validate that the `item_id` is of type `int` for `GET` and `PUT` requests.
    * If it is not, the client will see a useful, clear error.
* Check if there is an optional query parameter named `q` (as in `http://127.0.0.1:8000/items/foo?q=somequery`) for `GET` requests.
    * As the `q` parameter is declared with `= None`, it is optional.
    * Without the `None` it would be required (as is the body in the case with `PUT`).

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"_Honestly, what you've built looks super solid and polished. In many ways, it's what I wanted **Hug** to be - it's really inspiring to see someone build that._"

---

<div style="text-align: left; direction: ltr;">"Honestly, what you've built looks super solid and polished. In many ways, it's what I wanted <strong>Hug</strong> to be - it's really inspiring to see someone build that."</div>

* Die interaktive API-Dokumentation wird automatisch aktualisiert, einschließlich des neuen Bodys:

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* Klicken Sie auf die Taste „Try it out“, damit können Sie die Parameter ausfüllen und direkt mit der API interagieren:

![Swagger UI Interaktion](https://fastapi.tiangolo.com/img/index/index-04-swagger-03.png)