* on what responses can be stored, and which requests can be satisfied by those stored responses.
 *
 * See [RFC 7234, 5.2](https://tools.ietf.org/html/rfc7234#section-5.2).
 */
class CacheControl internal constructor(
  /**
   * In a response, this field's name "no-cache" is misleading. It doesn't prevent us from caching

## `Union` 或 `anyOf` { #union-or-anyof }

你可以將回應宣告為多個型別的 `Union`，表示回應可能是其中任一型別。

在 OpenAPI 中會以 `anyOf` 定義。

要達成這點，使用標準的 Python 型別提示 [`typing.Union`](https://docs.python.org/3/library/typing.html#typing.Union)：

/// note

在定義 [`Union`](https://docs.pydantic.dev/latest/concepts/types/#unions) 時，請先放置「更具體」的型別，再放「較不具體」的型別。以下範例中，較具體的 `PlaneItem` 置於 `CarItem` 之前：`Union[PlaneItem, CarItem]`。

///

///

### JSON Schema’nın `examples` alanı { #json-schemas-examples-field }

Sonrasında JSON Schema, spesifikasyonun yeni bir sürümüne [`examples`](https://json-schema.org/draft/2019-09/json-schema-validation.html#rfc.section.9.5) alanını ekledi.

Ardından yeni OpenAPI 3.1.0, bu yeni `examples` alanını içeren en güncel sürümü (JSON Schema 2020-12) temel aldı.

constraints.ParametersScriptAssert.message = "{script}" betik ifadesi doğru değil.
constraints.Range.message = {item}, {min} ile {max} arasında olmalıdır.
constraints.SafeHtml.message = {item} güvenli olmayan HTML içeriği içeriyor.
constraints.ScriptAssert.message = "{script}" betik ifadesi doğru değil.
constraints.URL.message = {item} geçerli bir URL değildir.
constraints.Required.message = {item} gereklidir.

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip | Dica

O segundo argumento para [`os.getenv()`](https://docs.python.org/3.8/library/os.html#os.getenv) é o valor padrão a ser retornado.

Se não for fornecido, é `None` por padrão, Aqui fornecemos `"World"` como o valor padrão a ser usado.

///

Então você poderia chamar esse programa Python:

labels.facet_contentLength_250kto500k=250KB - 500KB
labels.facet_contentLength_1mto5m=1MB - 5MB
labels.facet_contentLength_5m=5MB -  
labels.facet_filetype_title=Bestandstype
labels.facet_filetype_html=HTML
labels.facet_filetype_word=MS Word
labels.facet_filetype_excel=MS Excel
labels.facet_filetype_powerpoint=MS PowerPoint
labels.facet_filetype_odt=ODF Word
labels.facet_filetype_ods=ODF Spreadsheet

    }
  }

  /**
   * Returns the class path URIs specified by the {@code Class-Path} manifest attribute, according
   * to <a
   * href="https://docs.oracle.com/en/java/javase/25/docs/specs/jar/jar.html#main-attributes">JAR
   * File Specification</a>. If {@code manifest} is null, it means the jar file has no manifest, and
   * an empty set will be returned.
   */
  @VisibleForTesting

constraints.ParametersScriptAssert.message = De scriptuitdrukking "{script}" is niet waar.
constraints.Range.message = {item} moet tussen {min} en {max} liggen.
constraints.SafeHtml.message = {item} bevat gevaarlijke HTML-inhoud.
constraints.ScriptAssert.message = De scriptuitdrukking "{script}" is niet waar.
constraints.URL.message = {item} is geen geldige URL.
constraints.Required.message = {item} is vereist.

constraints.ParametersScriptAssert.message = Скриптовое выражение "{script}" не является истинным.
constraints.Range.message = {item} должно быть в диапазоне от {min} до {max}.
constraints.SafeHtml.message = {item} содержит небезопасный HTML-контент.
constraints.ScriptAssert.message = Скриптовое выражение "{script}" не является истинным.
constraints.URL.message = {item} - неверный URL-адрес.
constraints.Required.message = {item} обязательно.

  }

  private fun retryAfter(
    userResponse: Response,
    defaultDelay: Int,
  ): Int {
    val header = userResponse.header("Retry-After") ?: return defaultDelay

    // https://tools.ietf.org/html/rfc7231#section-7.1.3
    // currently ignores a HTTP-date, and assumes any non int 0 is a delay
    if (header.matches("\\d+".toRegex())) {
      return Integer.valueOf(header)
    }
    return Integer.MAX_VALUE
  }