from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float


@app.get("/items/stream", response_class=EventSourceResponse)
async def stream_items() -> AsyncIterable[Item]:
    yield Item(name="Plumbus", price=32.99)
    yield Item(name="Portal Gun", price=999.99)
```

For full control over SSE fields (`event`, `id`, `retry`, `comment`), yield `ServerSentEvent` instances:

</div>

**Nota**: Certifique-se de que você colocou `"fastapi[standard]"` com aspas, para garantir que funcione em todos os terminais.

## Exemplo { #example }

### Crie { #create-it }

Crie um arquivo `main.py` com:

```Python
from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")

{* ../../docs_src/response_model/tutorial003_01_py310.py hl[7:10,13:14,18] *}

Chaque événement est un petit bloc de texte avec des « champs » comme `data`, `event`, `id` et `retry`, séparés par des lignes vides.

Cela ressemble à ceci :

```
data: {"name": "Portal Gun", "price": 999.99}

data: {"name": "Plumbus", "price": 32.99}

```

Les SSE sont couramment utilisés pour le streaming de chat IA, les notifications en direct, les journaux et l’observabilité, et d’autres cas où le serveur envoie des mises à jour au client.

Les arguments suivants sont pris en charge :

* `allow_origins` - Une liste d’origines autorisées à effectuer des requêtes cross-origin. Par ex. `['https://example.org', 'https://www.example.org']`. Vous pouvez utiliser `['*']` pour autoriser n’importe quelle origine.

def test_post_all(client: TestClient):
    data = {
        "name": "Special Offer",
        "description": "This is a special offer",
        "price": 38.6,
        "items": [
            {
                "name": "Foo",
                "description": "A very nice Item",
                "price": 35.4,
                "tax": 3.2,
                "tags": ["foo"],
                "images": [
                    {

Algumas dessas soluções também podem ser open source ou oferecer planos gratuitos, para que você possa testá-las sem compromisso financeiro. Outros geradores comerciais de SDK estão disponíveis e podem ser encontrados online. 🤓

## Crie um SDK em TypeScript { #create-a-typescript-sdk }

Vamos começar com uma aplicação FastAPI simples:

{* ../../docs_src/generate_clients/tutorial001_py310.py hl[7:9,12:13,16:17,21] *}

Each event is a small text block with "fields" like `data`, `event`, `id`, and `retry`, separated by blank lines.

It looks like this:

```
data: {"name": "Portal Gun", "price": 999.99}

data: {"name": "Plumbus", "price": 32.99}

```

SSE is commonly used for AI chat streaming, live notifications, logs and observability, and other cases where the server pushes updates to the client.

/// tip

            "price": 35.4,
            "tax": 3.2,
            "tags": IsList("foo", "bar", check_order=False),
            "image": {"url": "http://example.com/image.png", "name": "example image"},
        },
    }


def test_put_only_required(client: TestClient):
    response = client.put(
        "/items/5",
        json={"name": "Foo", "price": 35.4},
    )

                    "Item": {
                        "title": "Item",
                        "required": ["name", "price"],
                        "type": "object",
                        "properties": {
                            "name": {"title": "Name", "type": "string"},
                            "price": {"title": "Price", "type": "number"},
                            "description": {