description: str | None = None
    price: float
    tax: float | None = None
    tags: list[str] = []


@app.post("/items/", response_model=Item)
async def create_item(item: Item) -> Any:
    return item


@app.get("/items/", response_model=list[Item])
async def read_items() -> Any:
    return [
        {"name": "Portal Gun", "price": 42.0},
        {"name": "Plumbus", "price": 32.0},

            this.session = session;
            return this;
        }

        public DependencyCoordinatesFactoryRequestBuilder trace(RequestTrace trace) {
            this.trace = trace;
            return this;
        }

        public DependencyCoordinatesFactoryRequestBuilder groupId(String groupId) {
            this.groupId = groupId;
            return this;

@app.get("/items/", response_model=list[Item], tags=["items"])
async def get_items():
    return [
        {"name": "Plumbus", "price": 3},
        {"name": "Portal Gun", "price": 9001},
    ]


@app.post("/users/", response_model=ResponseMessage, tags=["users"])
async def create_user(user: User):

        this.macSigningKey = macSigningKey;
        this.signSequence = initialSequence;
        this.bypass = bypass;

        if (log.isTraceEnabled()) {
            log.trace("macSigningKey:");
            log.trace(Hexdump.toHexString(macSigningKey, 0, macSigningKey.length));
        }
    }

    /**
     * This constructor used to instance a SigningDigest object for

        // Test protected constructor with writable stack trace
        String message = "Test with writable stack trace";
        TestFessSystemException exception = new TestFessSystemException(message, true, true);

        assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());

        // Stack trace should be populated
        assertTrue(exception.getStackTrace().length > 0);

    original.add("one");
    original.add("two");
    original.add("three");

    EvictingQueue<String> copy = SerializableTester.reserialize(original);
    assertEquals(copy.maxSize, original.maxSize);
    assertThat(copy.remove()).isEqualTo("one");
    assertThat(copy.remove()).isEqualTo("two");
    assertThat(copy.remove()).isEqualTo("three");
    assertTrue(copy.isEmpty());
  }

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:

```JSON hl_lines="2"
{
    "item": {
        "name": "Foo",
        "description": "The pretender",
        "price": 42.0,
        "tax": 3.2
    }
}
```

ao invés de:

```JSON
{
    "name": "Foo",
    "description": "The pretender",
    "price": 42.0,
    "tax": 3.2
}
```

## Recapitulando { #recap }

    return {"message": "Item received"}


@app.get("/items/", response_model=list[Item], tags=["items"])
async def get_items():
    return [
        {"name": "Plumbus", "price": 3},
        {"name": "Portal Gun", "price": 9001},
    ]


@app.post("/users/", response_model=ResponseMessage, tags=["users"])
async def create_user(user: User):

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