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 { #path-environment-variable }

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
```

Swagger UI will handle it behind the scenes for you, but it needs this "redirect" helper.

///

### Create a *path operation* to test it { #create-a-path-operation-to-test-it }

Now, to be able to test that everything works, create a *path operation*:

{* ../../docs_src/custom_docs_ui/tutorial001_py310.py hl[36:38] *}

### Test it { #test-it }

ARGS:
endpoints*       (csv)       comma separated list of etcd endpoints e.g. "http://localhost:2379"
path_prefix      (path)      namespace prefix to isolate tenants e.g. "customer1/"
coredns_path     (path)      shared bucket DNS records, default is "/skydns"
client_cert      (path)      client cert for mTLS authentication
client_cert_key  (path)      client cert key for mTLS authentication
comment          (sentence)  optionally add a comment to this setting

package jcifs.smb1.smb1;

import jcifs.smb1.util.Hexdump;

class SmbComDelete extends ServerMessageBlock {

    private final int searchAttributes;

    SmbComDelete(final String fileName) {
        this.path = fileName;
        command = SMB_COM_DELETE;
        searchAttributes = ATTR_HIDDEN | ATTR_HIDDEN | ATTR_SYSTEM;
    }

    @Override
    int writeParameterWordsWireFormat(final byte[] dst, final int dstIndex) {

            batchLimits[8] = Byte.parseByte(s);
        }
    }

    SmbComTreeConnectAndX(final SmbSession session, final String path, final String service, final ServerMessageBlock andx) {
        super(andx);
        this.session = session;
        this.path = path;
        this.service = service;
        command = SMB_COM_TREE_CONNECT_ANDX;
    }

    @Override
    int getBatchLimit(final byte command) {

## Импорт `Header` { #import-header }

Сперва импортируйте `Header`:

{* ../../docs_src/header_params/tutorial001_an_py310.py hl[3] *}

## Объявление параметров `Header` { #declare-header-parameters }

Затем объявите параметры заголовка, используя ту же структуру, что и с `Path`, `Query` и `Cookie`.

## Позначити застарілою *операцію шляху* - OpenAPI { #documentation-deprecate-a-path-operation-openapi }

Щоб позначити *операцію шляху* як застарілу і показати це в інтерфейсі документації, прочитайте документацію [Навчальний посібник - Налаштування операції шляху - Позначення як застаріле](../tutorial/path-operation-configuration.md#deprecate-a-path-operation).

These are the special functions that you can put in *path operation function* parameters or dependency functions with `Annotated` to get data from the request.

It includes:

* `Query()`
* `Path()`
* `Body()`
* `Cookie()`
* `Header()`
* `Form()`
* `File()`

You can import them all directly from `fastapi`:

```python
from fastapi import Body, Cookie, File, Form, Header, Path, Query
```

::: fastapi.Query

		config.HelpKV{
			Key:         target.KafkaClientTLSCert,
			Description: "path to client certificate for mTLS auth",
			Optional:    true,
			Type:        "path",
			Sensitive:   true,
		},
		config.HelpKV{
			Key:         target.KafkaClientTLSKey,
			Description: "path to client key for mTLS auth",
			Optional:    true,
			Type:        "path",
			Sensitive:   true,
		},
		config.HelpKV{

///

### Tag'lerinizi kullanın { #use-your-tags }

*path operation*'larınızı (ve `APIRouter`'ları) farklı tag'lere atamak için `tags` parametresini kullanın:

{* ../../docs_src/metadata/tutorial004_py310.py hl[21,26] *}

/// info | Bilgi

Tag'ler hakkında daha fazlası için: [Path Operation Configuration](path-operation-configuration.md#tags).

///

### Dokümanları kontrol edin { #check-the-docs }