<img src="/img/python-types/image06.png">

Notice that this means "`one_person` is an **instance** of the class `Person`".

It doesn't mean "`one_person` is the **class** called `Person`".

## Pydantic models

<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> is a Python library to perform data validation.

        return nextHeaderIndex + 1 + index
      }

      @Throws(IOException::class)
      private fun readLiteralHeaderWithoutIndexingIndexedName(index: Int) {
        val name = getName(index)
        val value = readByteString()
        headerList.add(Header(name, value))
      }

      @Throws(IOException::class)
      private fun readLiteralHeaderWithoutIndexingNewName() {

  public void testGet_bad() {
    ImmutableIntArray iia = ImmutableIntArray.of(0, 1, 3);
    assertThrows(IndexOutOfBoundsException.class, () -> iia.get(-1));
    assertThrows(IndexOutOfBoundsException.class, () -> iia.get(3));

    ImmutableIntArray sub = iia.subArray(1, 2);
    assertThrows(IndexOutOfBoundsException.class, () -> sub.get(-1));
  }

  public void testIndexOf() {

    ImmutableDoubleArray iia = ImmutableDoubleArray.of(0, 1, 3);
    assertThrows(IndexOutOfBoundsException.class, () -> iia.get(-1));
    assertThrows(IndexOutOfBoundsException.class, () -> iia.get(3));

    ImmutableDoubleArray sub = iia.subArray(1, 2);
    assertThrows(IndexOutOfBoundsException.class, () -> sub.get(-1));
  }

  public void testIndexOf() {

import org.lastaflute.job.LaScheduledJob;
import org.lastaflute.job.key.LaJobUnique;
import org.lastaflute.job.subsidiary.CronParamsSupplier;

public class JobHelper {
    private static final Logger logger = LogManager.getLogger(JobHelper.class);

    protected int monitorInterval = 60 * 60;// 1hour

    protected ThreadLocal<LaJobRuntime> jobRuntimeLocal = new ThreadLocal<>();

```Python hl_lines="1  7-12  19-20"
{!../../docs_src/dataclasses/tutorial001.py!}
```

Das ist dank **Pydantic** ebenfalls möglich, da es <a href="https://pydantic-docs.helpmanual.io/usage/dataclasses/#use-of-stdlib-dataclasses-with-basemodel" class="external-link" target="_blank">`dataclasses` intern unterstützt</a>.

        ArrayList<ProducedArtifact> result = new ArrayList<>(2);
        result.add(session.getArtifact(ProducedArtifact.class, pomArtifact));
        if (!ArtifactIdUtils.equalsVersionlessId(pomArtifact, projectArtifact)) {
            result.add(session.getArtifact(ProducedArtifact.class, projectArtifact));
        }
        return Collections.unmodifiableList(result);
    }

    @Nonnull
    @Override

👆 💪 👀 🌖 ℹ <a href="https://www.starlette.io/background/" class="external-link" target="_blank">💃 🛂 🩺 🖥 📋</a>.

## ⚠

🚥 👆 💪 🎭 🏋️ 🖥 📊 &amp; 👆 🚫 🎯 💪 ⚫️ 🏃 🎏 🛠️ (🖼, 👆 🚫 💪 💰 💾, 🔢, ♒️), 👆 💪 💰 ⚪️➡️ ⚙️ 🎏 🦏 🧰 💖 <a href="https://docs.celeryq.dev" class="external-link" target="_blank">🥒</a>.

But FastAPI also supports using <a href="https://docs.python.org/3/library/dataclasses.html" class="external-link" target="_blank">`dataclasses`</a> the same way:

{* ../../docs_src/dataclasses/tutorial001.py hl[1,7:12,19:20] *}

This is still supported thanks to **Pydantic**, as it has <a href="https://docs.pydantic.dev/latest/concepts/dataclasses/#use-of-stdlib-dataclasses-with-basemodel" class="external-link" target="_blank">internal support for `dataclasses`</a>.

import org.lastaflute.web.Execute;
import org.lastaflute.web.response.JsonResponse;

/**
 * @author shinsuke
 */
public class ApiAdminAccesstokenAction extends FessApiAdminAction {

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

    // ===================================================================================