* Used in production applications.

## Starlette features { #starlette-features }

**FastAPI** is fully compatible with (and based on) <a href="https://www.starlette.io/" class="external-link" target="_blank"><strong>Starlette</strong></a>. So, any additional Starlette code you have, will also work.

`FastAPI` is actually a sub-class of `Starlette`. So, if you already know or use Starlette, most of the functionality will work the same way.

/// note | Technische Details

Sie können auch `from starlette import status` verwenden.

**FastAPI** bietet dieselben `starlette.status`-Codes auch via `fastapi.status` an, als Annehmlichkeit für Sie, den Entwickler. Sie kommen aber direkt von Starlette.

///

## Tags

/// note | Технические детали

Вы также можете использовать `from starlette import status`.

**FastAPI** предоставляет тот же `starlette.status` под псевдонимом `fastapi.status` для удобства разработчика. Но его источник - это непосредственно Starlette.

///

## Теги

# WebSockets

When defining WebSockets, you normally declare a parameter of type `WebSocket` and with it you can read data from the client and send data to it.

It is provided directly by Starlette, but you can import it from `fastapi`:

```python
from fastapi import WebSocket
```

/// tip

**FastAPI** then takes that JSON Schema data and puts it in OpenAPI, apart from all the other things it does.

///

### <a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a> { #starlette }

Starlette is a lightweight <abbr title="The new standard for building asynchronous Python web applications">ASGI</abbr> framework/toolkit, which is ideal for building high-performance asyncio services.

& ⤴️ ➕1️⃣ 🖥 📋 🏗 *➡ 🛠️ 🔢* 🔜 ✍ 📧 ⚙️ `email` ➡ 🔢.

## 📡 ℹ

🎓 `BackgroundTasks` 👟 🔗 ⚪️➡️ <a href="https://www.starlette.io/background/" class="external-link" target="_blank">`starlette.background`</a>.

⚫️ 🗄/🔌 🔗 🔘 FastAPI 👈 👆 💪 🗄 ⚫️ ⚪️➡️ `fastapi` &amp; ❎ 😫 🗄 🎛 `BackgroundTask` (🍵 `s` 🔚) ⚪️➡️ `starlette.background`.

///

## Más información

Para aprender más sobre las opciones, revisa la documentación de Starlette para:

* <a href="https://www.starlette.io/websockets/" class="external-link" target="_blank">La clase `WebSocket`</a>.

///

## Mehr Informationen

Weitere Informationen zu Optionen finden Sie in der Dokumentation von Starlette:

* <a href="https://www.starlette.io/websockets/" class="external-link" target="_blank">Die `WebSocket`-Klasse</a>.

///

### 🌅 ℹ

/// note | 📡 ℹ

👆 💪 ⚙️ `from starlette.responses import Response` ⚖️ `from starlette.responses import JSONResponse`.

**FastAPI** 🚚 🎏 `starlette.responses` `fastapi.responses` 🏪 👆, 👩‍💻. ✋️ 🌅 💪 📨 👟 🔗 ⚪️➡️ 💃.

 & `Response` 💪 ⚙️ 🛎 ⚒ 🎚 & 🍪, **FastAPI** 🚚 ⚫️ `fastapi.Response`.

///

That status code will be used in the response and will be added to the OpenAPI schema.

/// note | Technical Details

You could also use `from starlette import status`.

**FastAPI** provides the same `starlette.status` as `fastapi.status` just as a convenience for you, the developer. But it comes directly from Starlette.

///

## Tags { #tags }