settings.set(key, value);
        assertEquals(value, settings.getAsLong(key, -1));
    }

    @Test
    public void test_setAndGetAsFloat() {
        String key = "key";
        float value = 0.01F;
        settings.set(key, value);
        assertEquals(value, settings.getAsFloat(key, -1), 0);
    }

    @Test
    public void test_setAndGetAsBoolean() {
        String key = "key";

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


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


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


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


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):

{* ../../docs_src/response_model/tutorial004_py310.py hl[9,11:12] *}

* `description: Union[str, None] = None` (or `str | None = None` in Python 3.10) has a default of `None`.
* `tax: float = 10.5` has a default of `10.5`.
* `tags: List[str] = []` has a default of an empty list: `[]`.

but you might want to omit them from the result if they were not actually stored.

{* ../../docs_src/response_model/tutorial004_py310.py hl[9,11:12] *}

* `description: Union[str, None] = None` (ou `str | None = None` no Python 3.10) tem um padrão de `None`.
* `tax: float = 10.5` tem um padrão de `10.5`.
* `tags: List[str] = []` tem um padrão de uma lista vazia: `[]`.

mas você pode querer omiti-los do resultado se eles não foram realmente armazenados.

それをここで見ていきましょう。

この場合、`int`のキーと`float`の値を持つものであれば、どんな`dict`でも受け入れることができます:

{* ../../docs_src/body_nested_models/tutorial009.py hl[15] *}

/// tip | 豆知識

JSONはキーとして`str`しかサポートしていないことに注意してください。

しかしPydanticには自動データ変換機能があります。

これは、APIクライアントがキーとして文字列しか送信できなくても、それらの文字列に純粋な整数が含まれている限り、Pydanticが変換して検証することを意味します。

そして、`weights`として受け取る`dict`は、実際には`int`のキーと`float`の値を持つことになります。

///

## まとめ

            "analyzer": "empty_analyzer"
          }
        }
      }
    ],
    "properties": {
      "anchor": {
        "type": "keyword"
      },
      "boost": {
        "type": "float"
      },
      "click_count": {
        "type": "long"
      },
      "config_id": {
        "type": "keyword"
      },
      "important_content": {
        "type": "text",

    //                                                                        ============
    public static class SearchRequestParams {

        private Boolean explain;

        private Float minScore;

        private String preference;

        private String routing;

        private String searchType;

        private long timeoutInMillis = -1;

        private Boolean version;

Aynı hata <a href="http://127.0.0.1:8000/items/4.2" class="external-link" target="_blank">http://127.0.0.1:8000/items/4.2</a> sayfasında olduğu gibi `int` yerine `float` bir değer verseydik de ortaya çıkardı.

/// check | Ek bilgi

Böylece, aynı Python tip tanımlaması ile birlikte, **FastAPI** veri doğrulama özelliği sağlar.

      "input": "foo"
    }
  ]
}
```
тому що параметр шляху має значення `"foo"`, яке не є типом `int`.

Таку саму помилку отримаємо, якщо передати `float` замість `int`, як бачимо, у цьому прикладі: <a href="http://127.0.0.1:8000/items/4.2" class="external-link" target="_blank">http://127.0.0.1:8000/items/4.2</a>

/// check | Примітка