name: str
    description: str | None = None
    price: float
    tax: float | None = None
    tags: set[str] = set()


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


@app.get("/items/", tags=["items"])
async def read_items():
    return [{"name": "Foo", "price": 42}]


@app.get("/users/", tags=["users"])
async def read_users():

            urlQueue.setUrl("http://www.example.com/page" + i);
            urlQueueList.add(urlQueue);
        }

        urlQueueService.offerAll(sessionId, urlQueueList);

        // Poll all items
        int count = 0;
        while (true) {
            final OpenSearchUrlQueue polled = urlQueueService.poll(sessionId);
            if (polled == null) {
                break;
            }

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


app = FastAPI()


@app.get("/items/stream-invalid")
async def stream_items_invalid() -> AsyncIterable[Item]:
    yield {"name": "valid", "price": 1.0}
    yield {"name": "invalid", "price": "not-a-number"}


@app.get("/items/stream-invalid-sync")
def stream_items_invalid_sync() -> Iterable[Item]:
    yield {"name": "valid", "price": 1.0}

이 예제를 실행하고 [http://127.0.0.1:8000/items/3](http://127.0.0.1:8000/items/3)을 열면, 다음 응답을 볼 수 있습니다:

```JSON
{"item_id":3}
```

/// check | 확인

함수가 받은(반환도 하는) 값은 문자열 `"3"`이 아니라 파이썬 `int` 형인 `3`입니다.

즉, 타입 선언을 하면 **FastAPI**는 자동으로 요청을 <dfn title="HTTP 요청에서 전달되는 문자열을 파이썬 데이터로 변환">"파싱"</dfn>합니다.

///

## 데이터 검증 { #data-validation }

    name: str
    price: float


items = [
    Item(name="Plumbus", price=32.99),
    Item(name="Portal Gun", price=999.99),
    Item(name="Meeseeks Box", price=49.99),
]


@app.get("/items/stream", response_class=EventSourceResponse)
async def stream_items() -> AsyncIterable[ServerSentEvent]:
    yield ServerSentEvent(comment="stream of item updates")
    for i, item in enumerate(items):

from fastapi import FastAPI

description = """
ChimichangApp API helps you do awesome stuff. 🚀

## Items

You can **read items**.

## Users

You will be able to:

* **Create users** (_not implemented_).
* **Read users** (_not implemented_).
"""

app = FastAPI(
    title="ChimichangApp",
    description=description,
    summary="Deadpool's favorite app. Nuff said.",
    version="0.0.1",

                    type: array
                    items:
                      type: string
                    example: ["aaa"]
                  related_contents:
                    type: array
                    items:
                      type: string
                    example: []
                  data:
                    type: array
                    items:
                      type: object

from enum import Enum

from fastapi import FastAPI

app = FastAPI()


class Tags(Enum):
    items = "items"
    users = "users"


@app.get("/items/", tags=[Tags.items])
async def get_items():
    return ["Portal gun", "Plumbus"]


@app.get("/users/", tags=[Tags.users])
async def read_users():

        /**
         * Sets the list of items processed in the bulk operation.
         * @param items The list of items, where each item is represented by a map.
         * @return The ApiBulkResponse instance.
         */
        public ApiBulkResponse items(final List<Map<String, Object>> items) {
            this.items = items;
            return this;
        }

        @Override

from fastapi import FastAPI

app = FastAPI()


@app.get("/items/", tags=["items"])
async def read_items():
    return [{"name": "Foo", "price": 42}]


@app.get("/users/", tags=["users"])
async def read_users():
    return [{"username": "johndoe"}]


@app.get("/elements/", tags=["items"], deprecated=True)
async def read_elements():