from fastapi import FastAPI

app = FastAPI()


@app.get("/items/", openapi_extra={"x-aperture-labs-portal": "blue"})
async def read_items():

///

Bunun anlamı şudur: "`items` değişkeni bir `list`tir ve bu listedeki öğelerin her biri bir `str`dir".

Bunu yaparak, düzenleyicinizin listedeki öğeleri işlerken bile destek sağlamasını sağlayabilirsiniz:

<img src="/img/python-types/image05.png">

Tip belirteçleri olmadan, bunu başarmak neredeyse imkansızdır.

`item` değişkeninin `items` listesindeki öğelerden biri olduğuna dikkat edin.

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():

Wenn Sie nun zu:

```
http://127.0.0.1:8000/items/foo?short=1
```

oder

```
http://127.0.0.1:8000/items/foo?short=True
```

oder

```
http://127.0.0.1:8000/items/foo?short=true
```

oder

```
http://127.0.0.1:8000/items/foo?short=on
```

oder

```
http://127.0.0.1:8000/items/foo?short=yes
```

        assertEquals(arr.length, result.length);
        assertEquals(arr[0], result[0]);

        // Test ArrayList
        final List<String> list = new ArrayList<>();
        list.add("item1");
        list.add("item2");
        binary = SerializeUtil.fromObjectToBinary(list);
        @SuppressWarnings("unchecked")
        final List<String> resultList = (List<String>) SerializeUtil.fromBinaryToObject(binary);

from fastapi import FastAPI
from fastapi.responses import UJSONResponse

app = FastAPI()


@app.get("/items/", response_class=UJSONResponse)
async def read_items():

from pydantic.v1 import BaseModel


class Item(BaseModel):
    name: str
    description: str | None = None
    size: float


class ItemV2(BaseModelV2):
    name: str
    description: str | None = None
    size: float


app = FastAPI()


@app.post("/items/", response_model=ItemV2)
async def create_item(item: Item):

from pydantic.v1 import BaseModel


class Item(BaseModel):
    name: str
    description: Union[str, None] = None
    size: float


class ItemV2(BaseModelV2):
    name: str
    description: Union[str, None] = None
    size: float


app = FastAPI()


@app.post("/items/", response_model=ItemV2)
async def create_item(item: Item):

本例中，访问：

```
http://127.0.0.1:8000/items/foo?short=1
```

或

```
http://127.0.0.1:8000/items/foo?short=True
```

或

```
http://127.0.0.1:8000/items/foo?short=true
```

或

```
http://127.0.0.1:8000/items/foo?short=on
```

或

```
http://127.0.0.1:8000/items/foo?short=yes
```

{
  "item": "The Foo Wrestlers"
}
```

Mas se o cliente faz uma requisição para `http://example.com/items/bar` (ou seja, um não existente `item_id "bar"`), esse cliente receberá um HTTP status code 404 (o erro "não encontrado" — *not found error*), e uma resposta JSON:

```JSON
{
  "detail": "Item not found"
}
```

/// tip | Dica