body := `{"recursive": false, "dryRun": true, "remove": false, "scanMode": 0}`

	// Test all combinations!
	for pIdx, params := range qParamsArr {
		for vIdx, vars := range varsArr {
			_, err := extractHealInitParams(vars, params, bytes.NewReader([]byte(body)))
			isErrCase := false
			if pIdx < 4 || vIdx < 1 {
				isErrCase = true
			}

			if err != ErrNone && !isErrCase {

Variáveis de ambiente podem ser úteis para lidar com **configurações** do aplicativo, como parte da **instalação** do Python, etc.

## Criar e Usar Variáveis de Ambiente { #create-and-use-env-vars }

Você pode **criar** e usar variáveis de ambiente no **shell (terminal)**, sem precisar do Python:

//// tab | Linux, macOS, Windows Bash

<div class="termy">

```console

						dbName = f.DBName
					}
				}

				if tx.Statement.Distinct {
					expr = clause.Expr{SQL: "COUNT(DISTINCT(?))", Vars: []interface{}{clause.Column{Name: dbName}}}
				} else if dbName != "*" {
					expr = clause.Expr{SQL: "COUNT(?)", Vars: []interface{}{clause.Column{Name: dbName}}}
				}
			}
		}

		tx.Statement.AddClause(clause.Select{Expression: expr})
	}

- 实现并使用成熟的密码学工具，比如 pwdlib 和 JWT 令牌等。
- 在需要的地方使用 OAuth2 作用域添加更细粒度的权限控制。
- ...等。

尽管如此，你可能确实有非常特定的用例，需要在某些环境（例如生产环境）禁用 API 文档，或根据环境变量的配置来决定。

## 基于设置和环境变量的条件式 OpenAPI { #conditional-openapi-from-settings-and-env-vars }

你可以很容易地使用相同的 Pydantic 设置来配置生成的 OpenAPI 和文档 UI。

例如：

{* ../../docs_src/conditional_openapi/tutorial001_py310.py hl[6,11] *}

这里我们声明了设置项 `openapi_url`，其默认值同样是 `"/openapi.json"`。

然后在创建 `FastAPI` 应用时使用它。

			Optional:    true,
			Type:        "duration",
		},
		config.HelpKV{
			Key:         apiCorsAllowOrigin,
			Description: `set comma separated list of origins allowed for CORS requests` + defaultHelpPostfix(apiCorsAllowOrigin),
			Optional:    true,
			Type:        "csv",
		},
		config.HelpKV{
			Key:         apiRemoteTransportDeadline,

    @BeforeClass
    public static void beforeClass() throws Exception {
        runner = new OpenSearchRunner();
        runner.onBuild((number, settingsBuilder) -> {
            settingsBuilder.put("http.cors.enabled", true);
            settingsBuilder.put("discovery.type", "single-node");
        })
                .build(newConfigs().clusterName("ArraySettingsTest")
                        .numOfNode(1)

    @BeforeClass
    public static void beforeClass() throws Exception {
        runner = new OpenSearchRunner();
        runner.onBuild((number, settingsBuilder) -> {
            settingsBuilder.put("http.cors.enabled", true);
            settingsBuilder.put("discovery.type", "single-node");
        })
                .build(newConfigs().clusterName("ArraySettingsTest")
                        .numOfNode(1)

### Remplacer la méthode { #override-the-method }

Vous pouvez maintenant remplacer la méthode `.openapi()` par votre nouvelle fonction.

{* ../../docs_src/extending_openapi/tutorial001_py310.py hl[29] *}

### Vérifier { #check-it }

Une fois que vous allez sur [http://127.0.0.1:8000/redoc](http://127.0.0.1:8000/redoc), vous verrez que vous utilisez votre logo personnalisé (dans cet exemple, le logo de **FastAPI**) :

# Allowed origins for CORS.
api.cors.allow.origin=*
# Allowed HTTP methods for CORS.
api.cors.allow.methods=GET, POST, OPTIONS, DELETE, PUT
# Max age for CORS preflight requests.
api.cors.max.age=3600
# Allowed headers for CORS.
api.cors.allow.headers=Origin, Content-Type, Accept, Authorization, X-Requested-With
# Whether to allow credentials for CORS.
api.cors.allow.credentials=true

    @BeforeClass
    public static void beforeClass() throws Exception {
        runner = new OpenSearchRunner();
        runner.onBuild((number, settingsBuilder) -> {
            settingsBuilder.put("http.cors.enabled", true);
            settingsBuilder.put("discovery.type", "single-node");
        })
                .build(newConfigs().clusterName("ArraySettingsTest")
                        .numOfNode(1)