Nota que esto significa "`one_person` es una **instance** de la clase `Person`".

No significa "`one_person` es la **clase** llamada `Person`".

## Modelos Pydantic

<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> es un paquete de Python para realizar la validación de datos.

Declaras la "forma" de los datos como clases con atributos.

Y cada atributo tiene un tipo.

توجه کن که این یعنی "`one_person` یه **نمونه** از کلاس `Person` هست".

یعنی "`one_person` خود **کلاس** به اسم `Person` نیست".

## مدل‌های Pydantic

<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> یه کتابخونه پایتونه برای اعتبارسنجی داده‌ها.

"شکل" داده‌ها رو به‌عنوان کلاس‌هایی با ویژگی‌ها تعریف می‌کنی.

و هر ویژگی یه نوع داره.

import java.time.format.DateTimeFormatter;
import java.util.Map;

import org.codelibs.fess.entity.SearchLogEvent;
import org.codelibs.fess.opensearch.log.bsentity.BsUserInfo;

/**
 * @author FreeGen
 */
public class UserInfo extends BsUserInfo implements SearchLogEvent {

    private static final long serialVersionUID = 1L;

    private Map<String, Object> fields;

    @Override
    public String getId() {

import org.lastaflute.core.mail.LaTypicalPostcard;
import org.lastaflute.core.mail.MPCall;
import org.lastaflute.core.mail.Postbox;

/**
 * The postcard for MailFlute on LastaFlute.
 * @author FreeGen
 */
public class TestmailPostcard extends LaTypicalPostcard {

    // ===================================================================================
    //                                                                          Definition

import jakarta.validation.constraints.Max;
import jakarta.validation.constraints.Min;
import jakarta.validation.constraints.Size;

/**
 * The create form for managing related content.
 */
public class CreateForm {

    /**
     * Creates a new CreateForm instance.
     */
    public CreateForm() {
    }

    /**
     * The CRUD operation mode (create, update, etc.).
     */
    @ValidateTypeFailure

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.codelibs.fess.it.CrudTestBase;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;

@Tag("it")
public class RoleTests extends CrudTestBase {

    private static final String NAME_PREFIX = "roleTest_";
    private static final String API_PATH = "/api/admin/role";
    private static final String LIST_ENDPOINT_SUFFIX = "settings";

import java.util.Map;

import org.codelibs.fess.it.CrudTestBase;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;

import io.restassured.path.json.JsonPath;

@Tag("it")
public class SystemInfoTests extends CrudTestBase {

    private static final String NAME_PREFIX = "systemInfoTest_";
    private static final String API_PATH = "/api/admin/systeminfo";

import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit test for {@link Charsets}.
 *
 * @author Mike Bostock
 */
@GwtCompatible
@NullUnmarked
public class CharsetsTest extends TestCase {

  @J2ktIncompatible
  @GwtIncompatible // Non-UTF-8 Charset
  public void testUsAscii() {
    assertEquals(Charset.forName("US-ASCII"), Charsets.US_ASCII);
  }

  @J2ktIncompatible

@Ignore("test runners must not instantiate and run this directly, only via suites we build")
// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class QueuePeekTester<E> extends AbstractQueueTester<E> {
  @CollectionSize.Require(ZERO)
  public void testPeek_empty() {
    assertNull("emptyQueue.peek() should return null", getQueue().peek());
    expectUnchanged();
  }

@Ignore("test runners must not instantiate and run this directly, only via suites we build")
// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class SetAddAllTester<E> extends AbstractSetTester<E> {
  @CollectionFeature.Require(SUPPORTS_ADD)
  @CollectionSize.Require(absent = ZERO)
  public void testAddAll_supportedSomePresent() {
    assertTrue(