这意味着从环境变量中读取的**任何值**在 Python 中都将是一个 `str`，任何类型转换或验证都必须在代码中完成。

你将在[高级用户指南 - 设置和环境变量](./advanced/settings.md)中了解更多关于使用环境变量处理**应用程序设置**的信息。

## `PATH` 环境变量

有一个**特殊的**环境变量称为 **`PATH`**，操作系统（Linux、macOS、Windows）用它来查找要运行的程序。

`PATH` 变量的值是一个长字符串，由 Linux 和 macOS 上的冒号 `:` 分隔的目录组成，而在 Windows 上则是由分号 `;` 分隔的。

例如，`PATH` 环境变量可能如下所示：

//// tab | Linux, macOS

```plaintext
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
```

* non-Annotated: non-Annotated (do not translate non-Annotated when it comes after a Python version.e.g., “Python 3.10+ non-Annotated”)
* operation IDs: IDs de operação
* path (as in URL path): path
* path operation: operação de rota
* path operation function: função de operação de rota
* prefix: prefixo
* request (as in HTTP request): request (do not change if it's already translated to requisição)

 */

package jcifs.smb1.smb1;

class SmbComCreateDirectory extends ServerMessageBlock {

    SmbComCreateDirectory(final String directoryName) {
        this.path = directoryName;
        command = SMB_COM_CREATE_DIRECTORY;
    }

    @Override
    int writeParameterWordsWireFormat(final byte[] dst, final int dstIndex) {
        return 0;
    }

    @Override

            {"ads_id": "ads_track"},
        ),
        ("/items", {"session": "cookiesession"}, 200, {"ads_id": None}),
    ],
)
def test(path, cookies, expected_status, expected_response, mod: ModuleType):
    client = TestClient(mod.app, cookies=cookies)
    response = client.get(path)
    assert response.status_code == expected_status
    assert response.json() == expected_response


def test_openapi_schema(mod: ModuleType):

    return client


@pytest.mark.parametrize(
    "path,headers,expected_status,expected_response",
    [
        ("/items", None, 200, {"User-Agent": "testclient"}),
        ("/items", {"X-Header": "notvalid"}, 200, {"User-Agent": "testclient"}),
        ("/items", {"User-Agent": "FastAPI test"}, 200, {"User-Agent": "FastAPI test"}),
    ],
)
def test(path, headers, expected_status, expected_response, client: TestClient):

            "/items",
            {"strange-header": "Not really underscore"},
            200,
            {"strange_header": None},
        ),
    ],
)
def test(path, headers, expected_status, expected_response, client: TestClient):
    response = client.get(path, headers=headers)
    assert response.status_code == expected_status
    assert response.json() == expected_response


def test_openapi_schema(client: TestClient):

Você pode ler mais sobre isso no [Guia Avançado do Usuário](../advanced/index.md){.internal-link target=_blank}.

## Detalhes { #details }

O primeiro `"/static"` refere-se ao sub-path no qual este "subaplicativo" será "montado". Assim, qualquer path que comece com `"/static"` será tratado por ele.

O `directory="static"` refere-se ao nome do diretório que contém seus arquivos estáticos.

            },
        ),
        (
            "/items/baz?short=true",
            {"item_id": "baz"},
        ),
    ],
)
def test_read_user_item(client: TestClient, path, expected_json):
    response = client.get(path)
    assert response.status_code == 200
    assert response.json() == expected_json


def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")

## `PATH` 환경 변수

**`PATH`**라고 불리는, **특별한** 환경변수가 있습니다. 운영체제(Linux, Windows, macOS 등)에서 실행할 프로그램을 찾기위해 사용됩니다.

변수 `PATH`의 값은 Linux와 macOS에서는 콜론 `:`, Windows에서는 세미콜론 `;`으로 구분된 디렉토리로 구성된 긴 문자열입니다.

예를 들어, `PATH` 환경 변수는 다음과 같습니다:

//// tab | Linux, macOS

```plaintext
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin

    <!--<ruleset-ref path='rulesets/basic.xml'>-->
        <!--<exclude name='ExplicitHashSetInstantiation'/>-->
        <!--<exclude name='ExplicitCallToAndMethod'/>-->
        <!--<exclude name='ExplicitCallToOrMethod'/>-->
    <!--</ruleset-ref>-->
    <ruleset-ref path='rulesets/braces.xml'/>
    <ruleset-ref path='rulesets/imports.xml'>
        <exclude name="ImportFromSunPackages"/>