## Типи множин

Але потім ми подумали, що теги не повинні повторюватися, вони, ймовірно, повинні бути унікальними рядками.

І Python має спеціальний тип даних для множин унікальних елементів — це `set`.

Тому ми можемо оголосити `tags` як множину рядків:

{* ../../docs_src/body_nested_models/tutorial003_py310.py hl[12] *}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// This file encapsulates some of the odd characteristics of the ARM
// instruction set, to minimize its interaction with the core of the
// assembler.

package arch

import (
	"strings"

	"cmd/internal/obj"
	"cmd/internal/obj/arm"
)

var armLS = map[string]uint8{
	"U":  arm.C_UBIT,

import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.junit.Ignore;

/**
 * A generic JUnit test which tests {@code toString()} operations on a map. Can't be invoked
 * directly; please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
 *

    private boolean sourceLevelSet = false;

    public void setSourceLevel(String sourceLevel) {
        if (sourceLevelSet) {
            throw new IllegalStateException("Cannot reset sourceLevel attribute; it is already set to: " + sourceLevel);
        } else if (!(USER_LEVEL.equals(sourceLevel) || PROJECT_LEVEL.equals(sourceLevel)  || GLOBAL_LEVEL.equals(sourceLevel))) {

import java.util.concurrent.RejectedExecutionException
import okhttp3.internal.okHttpName

/**
 * A set of tasks that are executed in sequential order.
 *
 * Work within queues is not concurrent. This is equivalent to each queue having a dedicated thread
 * for its work; in practice a set of queues may share a set of threads to save resources.
 */
class TaskQueue internal constructor(
  internal val taskRunner: TaskRunner,

   *
   * <p>The returned builder can be used for populating an {@link ImmutableGraph}.
   *
   * <p>Note that the returned builder will always have {@link #incidentEdgeOrder} set to {@link
   * ElementOrder#stable()}, regardless of the value that was set in this builder.
   *
   * @since 28.0
   */
  public <N1 extends N> ImmutableGraph.Builder<N1> immutable() {
    GraphBuilder<N1> castBuilder = cast();

    private static final Logger logger = LogManager.getLogger(StemmerOverrideCreator.class);

    /**
     * Constructs a new creator for stemmer override dictionaries.
     * It sets the file pattern to match files starting with "stemmer_override"
     * and ending with ".txt".
     */
    public StemmerOverrideCreator() {
        super("stemmer_override.*\\.txt");
    }

    /**

        int unknownClass = 1234;
        String expected = "unknown error class: 1234";
        assertEquals(expected, NbtException.getErrorString(unknownClass, 0));
    }

    @Test
    @DisplayName("Constructor sets fields and message correctly")
    void testConstructor() {
        NbtException e = new NbtException(NbtException.ERR_SSN_SRVC, NbtException.CONNECTION_REFUSED);
        assertEquals(NbtException.ERR_SSN_SRVC, e.errorClass);

uid++)),e.each(function(){ce.event.add(this,t,i,r,n)})}function He(e,r,t){t?(_.set(e,r,!1),ce.event.add(e,r,{namespace:!1,handler:function(e){var t,n=_.get(this,r);if(1&e.isTrigger&&this[r]){if(n)(ce.event.special[r]||{}).delegateType&&e.stopPropagation();else if(n=ae.call(arguments),_.set(this,r,n),this[r](),t=_.get(this,r),_.set(this,r,!1),n!==t)return e.stopImmediatePropagation(),e.preventDefault(),t}else n&&(_.set(this,r,ce.event.trigger(n[0],n.slice(1),this)),e.stopPropagation(),e.isImmedia...

/// tip | Порада

Синтаксис `{"name", "description"}` створює `set` з цими двома значеннями.

Він еквівалентний `set(["name", "description"])`.

///

#### Використання `list` замість `set`

Якщо Ви забудете використати `set` і натомість застосуєте `list` або `tuple`, FastAPI все одно перетворить це на `set`, і все працюватиме правильно: