Subclass [EventListener](https://square.github.io/okhttp/5.x/okhttp/okhttp3/-event-listener/) and override methods for the events you are interested in. In a successful HTTP call with no redirects or retries the sequence of events is described by this flow.

![Events Diagram](../assets/images/******@****.***)

## Валидация числовых данных: числа с плавающей точкой, больше и меньше { #number-validations-floats-greater-than-and-less-than }

Валидация также применима к значениям типа `float`.

        if (read(this.tmp, 0, 8) < 0) {
            throw new SmbEndOfFileException();
        }
        return Encdec.dec_uint64be(this.tmp, 0);
    }

    @Override
    public final float readFloat() throws SmbException {
        if (read(this.tmp, 0, 4) < 0) {
            throw new SmbEndOfFileException();
        }
        return Encdec.dec_floatbe(this.tmp, 0);
    }

    @Override

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

* `description: Union[str, None] = None` (veya Python 3.10’da `str | None = None`) için default `None`’dır.
* `tax: float = 10.5` için default `10.5`’tir.
* `tags: List[str] = []` için default, boş bir list’tir: `[]`.

Ancak gerçekte kaydedilmedilerse, bunları sonuçtan çıkarmak isteyebilirsiniz.

        }
    }

    // Test getting numeric configuration values
    @Test
    public void test_get_numericValues() {
        String intKey = "numeric.int";
        String floatKey = "numeric.float";

        System.setProperty(Constants.FESS_CONFIG_PREFIX + intKey, "123");
        System.setProperty(Constants.FESS_CONFIG_PREFIX + floatKey, "45.67");

        try {

Os parâmetros da função serão reconhecidos conforme abaixo:

* Se o parâmetro também é declarado no **path**, será utilizado como um parâmetro de rota.
* Se o parâmetro é de um **tipo único** (como `int`, `float`, `str`, `bool`, etc) será interpretado como um parâmetro de **consulta**.
* Se o parâmetro é declarado como um **modelo Pydantic**, será interpretado como o **corpo** da requisição.

/// note | Nota

* `le`：小於或等於（`l`ess than or `e`qual）

{* ../../docs_src/path_params_numeric_validations/tutorial005_an_py310.py hl[10] *}

## 數值驗證：浮點數、大於與小於 { #number-validations-floats-greater-than-and-less-than }

數值驗證也適用於 `float`。

這時就能看出能宣告 <abbr title="greater than - 大於"><code>gt</code></abbr>（不只是 <abbr title="greater than or equal - 大於或等於"><code>ge</code></abbr>）的重要性。因為你可以要求數值必須大於 `0`，即便它小於 `1`。

所以，`0.5` 是有效的值，但 `0.0` 或 `0` 則無效。

	}

	switch funcName {
	case aggFnCount:
		// For all non-null values, the count is incremented.
		e.aggregate.runningCount++

	case aggFnAvg, aggFnSum:
		e.aggregate.runningCount++
		// Convert to float.
		f, ok := argVal.ToFloat()
		if !ok {
			return fmt.Errorf("Could not convert value %v (%s) to a number", argVal.value, argVal.GetTypeString())
		}
		argVal.setFloat(f)

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

* `description: Union[str, None] = None` (ou `str | None = None` en Python 3.10) a une valeur par défaut `None`.
* `tax: float = 10.5` a une valeur par défaut `10.5`.
* `tags: List[str] = []` a une valeur par défaut de liste vide : `[]`.

mais vous pourriez vouloir les omettre du résultat si elles n'ont pas été réellement stockées.

        * `implicit`
        * `clientCredentials`
        * `authorizationCode`
    * Mais il existe un « flow » spécifique qui peut parfaitement être utilisé pour gérer l'authentification directement dans la même application :
        * `password` : certains des prochains chapitres couvriront des exemples à ce sujet.