마찬가지로 예제에서 `tags`를 구체적으로 "문자열의 리스트"로 만들 수 있습니다:

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

## 집합 타입

그런데 생각해보니 태그는 반복되면 안 되고, 고유한(Unique) 문자열이어야 할 것 같습니다.

그리고 파이썬은 집합을 위한 특별한 데이터 타입 `set`이 있습니다.

그렇다면 `Set`을 임포트 하고 `tags`를 `str`의 `set`으로 선언할 수 있습니다:

```Python hl_lines="1  14"
{!../../docs_src/body_nested_models/tutorial003.py!}
```

		stats = targetStat{}
	}

	stats.totalEvents++
	list.targetStats[id] = stats
	return
}

type asyncEvent struct {
	ev        Event
	targetSet TargetIDSet
}

// Add - adds unique target to target list.
func (list *TargetList) Add(targets ...Target) error {
	list.Lock()
	defer list.Unlock()

	for _, target := range targets {
		if _, ok := list.targets[target.ID()]; ok {

 * as a cental repository for all jCIFS configuration properties. It cannot be
 * instantiated. Similar to <code>System</code> properties the namespace
 * is global therefore property names should be unique. Before use,
 * the <code>load</code> method should be called with the name of a
 * <code>Properties</code> file (or <code>null</code> indicating no
 * file) to initialize the <code>Config</code>. The <code>System</code>

  // there are no conflicts with other CSI drivers on the cluster, the recommendation
  // is to use csisc-<uuid>, a generated name, or a reverse-domain name which ends
  // with the unique CSI driver name.
  //
  // Objects are namespaced.
  //
  // More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
  // +optional

  optional string status = 2;

  // `lastTransitionTime` is the last time the condition transitioned from one status to another.
  optional k8s.io.apimachinery.pkg.apis.meta.v1.Time lastTransitionTime = 3;

  // `reason` is a unique, one-word, CamelCase reason for the condition's last transition.
  optional string reason = 4;

  // `message` is a human-readable message indicating details about last transition.
  optional string message = 5;
}

  optional string status = 2;

  // `lastTransitionTime` is the last time the condition transitioned from one status to another.
  optional k8s.io.apimachinery.pkg.apis.meta.v1.Time lastTransitionTime = 3;

  // `reason` is a unique, one-word, CamelCase reason for the condition's last transition.
  optional string reason = 4;

  // `message` is a human-readable message indicating details about last transition.
  optional string message = 5;
}

		if v, err := base64.StdEncoding.DecodeString(ckSum); err == nil {
			fi.Checksum = v
		}
		delete(userDefined, ReplicationSsecChecksumHeader)
	}
	uniqueID := mustGetUUID()
	tempObj := uniqueID

	// Initialize erasure metadata.
	for index := range partsMetadata {
		partsMetadata[index] = fi
	}

	// Order disks according to erasure distribution

     * outlined in RFC 2046. In forms, there are a series of fields to be supplied by the user who
     * fills out the form. Each field has a name. Within a given form, the names are unique.
     */
    @JvmField
    val FORM = "multipart/form-data".toMediaType()

    private val COLONSPACE = byteArrayOf(':'.code.toByte(), ' '.code.toByte())

import java.io.Serializable;
import java.util.NoSuchElementException;
import javax.annotation.CheckForNull;

/**
 * Implementation detail for the internal structure of {@link Range} instances. Represents a unique
 * way of "cutting" a "number line" (actually of instances of type {@code C}, not necessarily
 * "numbers") into two sections; this can be done below a certain value, above a certain value,

import java.io.Serializable;
import java.util.NoSuchElementException;
import javax.annotation.CheckForNull;

/**
 * Implementation detail for the internal structure of {@link Range} instances. Represents a unique
 * way of "cutting" a "number line" (actually of instances of type {@code C}, not necessarily
 * "numbers") into two sections; this can be done below a certain value, above a certain value,