return item

    @app.get("/items/")
    def read_items() -> list[Item]:
        return [
            Item(
                name="Portal Gun",
                description="Device to travel through the multi-rick-verse",
                sub=SubItem(subname="subname"),
            ),
            Item(name="Plumbus"),
        ]

    @app.post("/with-computed-field/")
    def create_with_computed_field(

    end

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Rick")
        function ->> execute: execute function code
        execute ->> code: return the result
    end

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Rick", salutation="Mr.")
        function ->> execute: execute function code
        execute ->> code: return the result
    end

```Python
q: Annotated[str, Query(default="rick")] = "morty"
```

...because it's not clear if the default value should be `"rick"` or `"morty"`.

So, you would use (preferably):

```Python
q: Annotated[str, Query()] = "rick"
```

...or in older code bases you will find:

```Python
q: str = Query(default="rick")
```

    end

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Rick")
        function ->> execute: execute function code
        execute ->> code: return the result
    end

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Rick", salutation="Mr.")
        function ->> execute: execute function code
        execute ->> code: return the result
    end

    end

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Rick")
        function ->> execute: execute function code
        execute ->> code: return the result
    end

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Rick", salutation="Mr.")
        function ->> execute: execute function code
        execute ->> code: return the result
    end

相反，应使用函数参数本身的实际默认值。否则会不一致。

例如，下面这样是不允许的：

```Python
q: Annotated[str, Query(default="rick")] = "morty"
```

...因为不清楚默认值应该是 `"rick"` 还是 `"morty"`。

因此，你应该这样用（推荐）：

```Python
q: Annotated[str, Query()] = "rick"
```

...或者在旧代码库中你会见到：

```Python
q: str = Query(default="rick")
```

### `Annotated` 的优势 { #advantages-of-annotated }

    end

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Rick")
        function ->> execute: execute function code
        execute ->> code: return the result
    end

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Rick", salutation="Mr.")
        function ->> execute: execute function code
        execute ->> code: return the result
    end

    end

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Rick")
        function ->> execute: führe Code der Funktion aus
        execute ->> code: gib das Resultat zurück
    end

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Rick", salutation="Mr.")
        function ->> execute: führe Code der Funktion aus

```Python
q: Annotated[str, Query(default="rick")] = "morty"
```

...тому, що не зрозуміло, яке значення має бути значенням за замовчуванням: `"rick"` чи `"morty"`.

Тож ви будете використовувати (бажано):

```Python
q: Annotated[str, Query()] = "rick"
```

...або у старих кодових базах ви знайдете:

```Python
q: str = Query(default="rick")
```

```Python
q: Annotated[str, Query(default="rick")] = "morty"
```

...потому что непонятно, какое значение должно быть по умолчанию: `"rick"` или `"morty"`.

Следовательно, используйте (предпочтительно):

```Python
q: Annotated[str, Query()] = "rick"
```

...или в старой кодовой базе вы увидите:

```Python
q: str = Query(default="rick")
```