在這種情況下，函式參數 `q` 為選用，且預設為 `None`。

/// check | 注意

另外請注意，FastAPI 能辨識出路徑參數 `item_id` 是路徑參數，而 `q` 不是，因此 `q` 會被當作查詢參數。

///

## 查詢參數型別轉換 { #query-parameter-type-conversion }

你也可以宣告 `bool` 型別，值會被自動轉換：

{* ../../docs_src/query_params/tutorial003_py310.py hl[7] *}

在這種情況下，如果你造訪：

```
http://127.0.0.1:8000/items/foo?short=1
```

或

```

package tests_test

import (
	"context"
	"database/sql"
	"os"
	"reflect"
	"testing"

	"gorm.io/driver/mysql"
	"gorm.io/gorm"
	. "gorm.io/gorm/utils/tests"
)

type wrapperTx struct {
	*sql.Tx
	conn *wrapperConnPool
}

func (c *wrapperTx) PrepareContext(ctx context.Context, query string) (*sql.Stmt, error) {
	c.conn.got = append(c.conn.got, query)
	return c.Tx.PrepareContext(ctx, query)
}

	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	// Call site replication hook.
	replLogIf(ctx, globalSiteReplicationSys.BucketMetaHook(ctx, madmin.SRBucketMeta{
		Type:      madmin.SRBucketMetaTypePolicy,
		Bucket:    bucket,
		Policy:    bucketPolicyBytes,
		UpdatedAt: updatedAt,
	}))

	// Success.
	writeSuccessNoContent(w)
}

                                        <input type="file" id="kuromojiFile" name="kuromojiFile" class="form-control-file"/>
                                    </div>
                                </div>
                            </div>
                            <div class="card-footer">
                                <button type="submit" class="btn btn-success"

                                        <input type="file" id="charMappingFile" name="charMappingFile" class="form-control-file"/>
                                    </div>
                                </div>
                            </div>
                            <div class="card-footer">
                                <button type="submit" class="btn btn-success"

                                        <input type="file" id="stopwordsFile" name="stopwordsFile" class="form-control-file"/>
                                    </div>
                                </div>
                            </div>
                            <div class="card-footer">
                                <button type="submit" class="btn btn-success"

    // Explicit replacements take priority over unsafe characters.
    builder.addEscape(' ', "_");
    builder.addEscape('!', "_");
    assertThat(builder.build().escape("The Quick Brown Fox!")).isEqualTo("Xhe_Xuick_Xrown_Xox_");
    // Explicit replacements take priority over safe characters.
    builder.setSafeRange(' ', '~');

                <artifactItem>
                  <groupId>org.apache.maven</groupId>
                  <artifactId>maven-api-model</artifactId>
                  <version>4.0.0-alpha-1-SNAPSHOT</version>
                  <type>mdo</type>
                  <outputDirectory>target/mdo/</outputDirectory>
                  <destFileName>maven.mdo</destFileName>
                </artifactItem>
              </artifactItems>
            </configuration>

        return null;
    }

    // ===================================================================================
    //                                                                           Type Name
    //                                                                           =========
    @Override
    public String getEntityTypeName() {
        return "org.codelibs.fess.opensearch.config.exentity.CrawlingInfo";

## [Requests](https://square.github.io/okhttp/5.x/okhttp/okhttp3/-request/)

Each HTTP request contains a URL, a method (like `GET` or `POST`), and a list of headers. Requests may also contain a body: a data stream of a specific content type.

## [Responses](https://square.github.io/okhttp/5.x/okhttp/okhttp3/-response/)

The response answers the request with a code (like 200 for success or 404 for not found), headers, and its own optional body.