{!> ../../docs_src/header_params/tutorial001.py!}
```

////

/// note | "Технические детали"

`Header` - это "родственный" класс `Path`, `Query` и `Cookie`. Он также наследуется от того же общего класса `Param`.

Но помните, что когда вы импортируете `Query`, `Path`, `Header` и другие из `fastapi`, на самом деле это функции, которые возвращают специальные классы.

///

/// info | "Дополнительная информация"

{!> ../../docs_src/header_params/tutorial001.py!}
```

////

/// note | "Technische Details"

`Header` ist eine Schwesterklasse von `Path`, `Query` und `Cookie`. Sie erbt von derselben gemeinsamen `Param`-Elternklasse.

Aber erinnern Sie sich, dass, wenn Sie `Query`, `Path`,  `Header` und andere von `fastapi` importieren, diese tatsächlich Funktionen sind, welche spezielle Klassen zurückgeben.

///

/// info

```

## 总结

你能够以与 [查询参数和字符串校验](query-params-str-validations.md){.internal-link target=_blank} 相同的方式使用 `Query`、`Path`（以及其他你还没见过的类）声明元数据和字符串校验。

而且你还可以声明数值校验：

* `gt`：大于（`g`reater `t`han）
* `ge`：大于等于（`g`reater than or `e`qual）
* `lt`：小于（`l`ess `t`han）
* `le`：小于等于（`l`ess than or `e`qual）

/// info

`Query`、`Path` 以及你后面会看到的其他类继承自一个共同的 `Param` 类（不需要直接使用它）。

	return convertLatencyToDuration(letency), nil
}

func vectorValue(promAPI promv1.API, query string) (float64, error) {
	val, _, err := promAPI.Query(context.Background(), query, time.Now())
	if err != nil {
		return 0, fmt.Errorf("query() failure for '%s': %v", query, err)
	}

	log.Debugf("executing query: %s  result:%s", query, val)

	switch v := val.(type) {
	case model.Vector:
		if v.Len() < 1 {

                                .get(stream -> stream.map(l -> labelTypeBhv.selectEntity(cb -> cb.query().setValue_Equal(l)).map(e -> {
                                    final List<ElevateWordToLabel> mList = elevateWordToLabelBhv.selectList(cb -> {
                                        cb.query().setElevateWordId_Equal(id);
                                        cb.query().setLabelTypeId_Equal(e.getId());
                                    });

            cb.query().setRegex_Wildcard(wrapQuery(pathMappingPager.regex));
        }
        if (StringUtil.isNotBlank(pathMappingPager.replacement)) {
            cb.query().setReplacement_Wildcard(wrapQuery(pathMappingPager.replacement));
        }
        // TODO Long, Integer, String supported only.

        // setup condition
        cb.query().addOrderBy_SortOrder_Asc();

                                {"title": "Q", "type": "string"}
                            ),
                            "name": "q",
                            "in": "query",
                        },
                        {
                            "required": False,
                            "schema": {
                                "title": "Skip",

import org.codelibs.fess.query.parser.QueryParser;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;
import org.dbflute.util.DfTypeUtil;
import org.opensearch.index.query.BoolQueryBuilder;
import org.opensearch.index.query.MatchPhraseQueryBuilder;
import org.opensearch.index.query.PrefixQueryBuilder;
import org.opensearch.index.query.QueryBuilder;

 */
@ExperimentalOkHttpApi
interface AsyncDns {
  /**
   * Query DNS records for `hostname`, in the order they are received.
   */
  fun query(
    hostname: String,
    callback: Callback,
  )

  /**
   * Callback to receive results from the DNS Queries.
   */
  @ExperimentalOkHttpApi
  interface Callback {
    /**
     * Return addresses for a dns query for a single class of IPv4 (A) or IPv6 (AAAA).

            creds = json.loads(response.data)

            query = {}
            query['Action'] = 'AssumeRoleWithClientGrants'
            query['Token'] = creds['access_token']
            query['DurationSeconds'] = creds['expires_in']
            query['Version'] = '2011-06-15'

            query_components = []
            for key in query:
                if query[key] is not None: