```Python hl_lines="14"
{!> ../../docs_src/body_nested_models/tutorial002.py!}
```

////

## Set 类型

但是随后我们考虑了一下，意识到标签不应该重复，它们很大可能会是唯一的字符串。

Python 具有一种特殊的数据类型来保存一组唯一的元素，即 `set`。

然后我们可以导入 `Set` 并将 `tag` 声明为一个由 `str` 组成的 `set`：

//// tab | Python 3.10+

```Python hl_lines="12"
{!> ../../docs_src/body_nested_models/tutorial003_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="14"

		RespElements: extractRespElements(w),
		UserAgent:    r.UserAgent(),
		Host:         handlers.GetSourceIP(r),
	})
}

// ObjectTagSet key value tags
type ObjectTagSet struct {
	Tags []tags.Tag `xml:"Tag"`
}

type objectTagging struct {
	XMLName xml.Name      `xml:"Tagging"`
	TagSet  *ObjectTagSet `xml:"TagSet"`
}

// GetObjectTaggingHandler - GET object tagging

	// Other zip authors might not even follow the basic format,
	// and we'll just ignore the Extra content in that case.
	var modified time.Time
parseExtras:
	for extra := readBuf(f.Extra); len(extra) >= 4; { // need at least tag and size
		fieldTag := extra.uint16()
		fieldSize := int(extra.uint16())
		if len(extra) < fieldSize {
			break
		}
		fieldBuf := extra.sub(fieldSize)

		switch fieldTag {
		case zip64ExtraID:

- The `build-tag` flag is reintroduced to conversion-gen and defaulter-gen which allow users to inject custom build tag during code generation process. ([#128259](https://github.com/kubernetes/kubernetes/pull/128259), [@dinhxuanvu](https://github.com/dinhxuanvu)) [SIG API Machinery]

      - name: range
      - name: receiver-naming
      - name: indent-error-flow
      - name: superfluous-else
      - name: modifies-parameter
      - name: unreachable-code
      - name: struct-tag
      - name: constant-logical-expr
      - name: bool-literal-in-expr
      - name: redefines-builtin-id
      - name: imports-blacklist
      - name: range-val-in-closure
      - name: range-val-address

//
// returns ErrNone if the signature matches.
func doesPolicySignatureV4Match(formValues http.Header) (auth.Credentials, APIErrorCode) {
	// Server region.
	region := globalSite.Region()

	// Parse credential tag.
	credHeader, s3Err := parseCredentialHeader("Credential="+formValues.Get(xhttp.AmzCredential), region, serviceS3)
	if s3Err != ErrNone {
		return auth.Credentials{}, s3Err
	}

	r := &http.Request{Header: formValues}

 *
 * <p>For example, an XML escaper would convert the literal string {@code "Foo<Bar>"} into {@code
 * "Foo&lt;Bar&gt;"} to prevent {@code "<Bar>"} from being confused with an XML tag. When the
 * resulting XML document is parsed, the parser API will return this text as the original literal
 * string {@code "Foo<Bar>"}.
 *

                        }
                        return attrValue;
                    }
                }
            }
        } catch (final Exception e) {
            logger.warn("Could not get a base tag. ", e);
        }
        return null;
    }

    protected List<String> getUrlFromTagAttribute(final URL url, final Document document, final String xpath, final String attr,
            final String encoding) {

    cat <<EOF
One or more test dependencies are not in the pip package.
If these test dependencies need to be in the TensorFlow pip package, please
add them to //tensorflow/tools/pip_package/BUILD. Otherwise, add the no_pip tag
to the test, or change code_check_full.bats in the SIG Build repository. That's
https://github.com/tensorflow/tensorflow/blob/master/tensorflow/tools/tf_sig_build_dockerfiles/devel.usertools/code_check_full.bats

var legacyXMLName = "SelectObjectContentRequest"

// UnmarshalXML - decodes XML data.
func (s3Select *S3Select) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
	// S3 also supports the older SelectObjectContentRequest tag,
	// though it is no longer found in documentation. This is
	// checked and renamed below to allow older clients to also
	// work.
	if start.Name.Local == legacyXMLName {