{* ../../docs_src/python_types/tutorial008_py310.py hl[1] *}

This means:

* The variable `prices` is a `dict`:
    * The keys of this `dict` are of type `str` (let's say, the name of each item).
    * The values of this `dict` are of type `float` (let's say, the price of each item).

#### Union { #union }

        assertTrue(str.contains(Hexdump.toHexString(level, 3)), "toString should contain hex level");
        assertTrue(str.contains("Trans2QueryFSInformation["), "should start with class name");
        assertTrue(str.contains(",informationLevel=0x"), "should contain level field marker");
    }

<dfn title="规范">规范</dfn>要求这些字段必须精确命名为 `username` 和 `password`，并且作为表单字段发送，而不是 JSON。

使用 `Form` 可以像使用 `Body`（以及 `Query`、`Path`、`Cookie`）一样声明相同的配置，包括校验、示例、别名（例如将 `username` 写成 `user-name`）等。

/// info

`Form` 是直接继承自 `Body` 的类。

///

/// tip

要声明表单请求体，必须显式使用 `Form`，否则这些参数会被当作查询参数或请求体（JSON）参数。

///

## 关于 "表单字段" { #about-form-fields }

    /**
     * The namespace identifier for the crawling session.
     * Used to organize and identify crawling activities in the system.
     * Defaults to the system crawling info name.
     */
    protected String namespace = Constants.CRAWLING_INFO_SYSTEM_NAME;

    /**
     * Array of web crawling configuration IDs to process.

nakijin.okinawa.jp
naklo.pl
nalchik.ru
nalchik.su
namaste.jp
namdalseid.no
namdinh.vn
name
name.az
name.eg
name.et
name.fj
name.hr
name.mk
name.mv
name.my
name.ng
name.pm
name.pr
name.qa
name.tj
name.tr
name.tt
name.vn
namegata.ibaraki.jp
namegawa.saitama.jp
namerikawa.toyama.jp
namie.fukushima.jp
namikata.ehime.jp

        NtTransQuerySecurityDesc cmd = new NtTransQuerySecurityDesc(fid, securityInformation);
        String result = cmd.toString();
        assertTrue(result.startsWith("NtTransQuerySecurityDesc["), "toString should start with class name");
        String hexFid = String.format("%04X", fid & 0xFFFF);
        String hexSec = String.format("%08X", securityInformation & 0xFFFFFFFFL);

| Fields | camelCase | `userPager`, `fessConfig` |

## Log Message Guidelines

- Logger: `LogManager.getLogger(ClassName.class)`
- Format: `key=value` (e.g., `userId={}`, `url={}`)
- Prefix with `[name]` when context identification is needed
- Mask sensitive values (passwords, tokens)

## i18n / Localization

            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));
            result.setCreatedTime(DfTypeUtil.toLong(source.get("createdTime")));
            result.setName(DfTypeUtil.toString(source.get("name")));
            result.setUpdatedBy(DfTypeUtil.toString(source.get("updatedBy")));
            result.setUpdatedTime(DfTypeUtil.toLong(source.get("updatedTime")));

        try {
            final RESULT result = entityType.newInstance();
            result.setName(DfTypeUtil.toString(source.get("name")));
            return updateEntity(source, result);
        } catch (InstantiationException | IllegalAccessException e) {
            final String msg = "Cannot create a new instance: " + entityType.getName();

   * comparator is not <i>consistent with equals</i>), the results of this method are undefined.
   *
   * <p><b>Note:</b> Despite what the method name suggests, if {@code map} is an {@code
   * ImmutableClassToInstanceMap}, no copy will actually be performed.
   *
   * @throws NullPointerException if any key or value in {@code map} is null