{* ../../docs_src/json_base64_bytes/tutorial001_py310.py ln[1:9,29:35] hl[9] *}

查看 `/docs` 时，你会看到字段 `data` 期望接收 base64 编码的字节：

<div class="screenshot">
<img src="/img/tutorial/json-base64-bytes/image01.png">
</div>

你可以发送如下请求：

```json
{
    "description": "Some data",
    "data": "aGVsbG8="
}
```

/// tip | 提示

まず、[仮想環境](../virtual-environments.md)を作成して有効化し、`pydantic-settings` パッケージをインストールします:

<div class="termy">

```console
$ pip install pydantic-settings
---> 100%
```

</div>

また、次のように `all` エクストラをインストールすると付属します:

<div class="termy">

```console
$ pip install "fastapi[all]"
---> 100%
```

</div>

import org.codelibs.fess.util.ComponentUtil;
import org.junit.jupiter.api.Test;

public class BaseThumbnailGeneratorTest extends UnitFessTestCase {

    private TestThumbnailGenerator generator;

    // Test concrete implementation for testing abstract BaseThumbnailGenerator
    private static class TestThumbnailGenerator extends BaseThumbnailGenerator {
        private boolean generateCalled = false;

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

import org.codelibs.curl.io.ContentCache;
import org.junit.Test;

/**
 * Test class for CurlResponse.
 * Tests response handling, header operations, and content access.
 */
public class CurlResponseTest {

    @Test
    public void testConstructor() {
        CurlResponse response = new CurlResponse();
        assertNotNull(response);
    }

 * {@code ObjectCountHashMap} minimizes object allocation and reduces memory footprint.
 *
 * <p>In the absence of element deletions, this will iterate over elements in insertion order.
 */
@GwtCompatible
@NullMarked
class ObjectCountHashMap<K extends @Nullable Object> {

  /** Creates an empty {@code ObjectCountHashMap} instance. */
  static <K extends @Nullable Object> ObjectCountHashMap<K> create() {
    return new ObjectCountHashMap<K>();

 * Manages witness registrations, notifications, and heartbeats for cluster failover support.
 */
public class WitnessClient implements AutoCloseable {
    private static final Logger log = LoggerFactory.getLogger(WitnessClient.class);

    // Polling and backoff constants (in ms)
    private static final long MAX_POLL_INTERVAL = 5000; // Normal polling: max 5 seconds

    }

    /**
     * Closes the file and releases any system resources associated with it.
     *
     * @throws SmbException if an I/O error occurs
     */
    public void close() throws SmbException {
        file.close();
    }

    @Override
    public final boolean readBoolean() throws SmbException {

        StringBuilder buf = new StringBuilder();
        Exception cause = new IllegalArgumentException("Root cause");
        Exception exception = new RuntimeException("Wrapper exception", cause);

        monitorTarget.appendException(buf, exception);
        assertTrue(buf.toString().contains("Wrapper exception"));
        assertTrue(buf.toString().contains("Root cause"));
        assertTrue(buf.toString().contains("IllegalArgumentException"));

import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.math.BigInteger;
import org.jspecify.annotations.Nullable;

/**
 * A wrapper class for unsigned {@code long} values, supporting arithmetic operations.
 *
 * <p>In some cases, when speed is more important than code readability, it may be faster simply to
 * treat primitive {@code long} values as unsigned, using the methods from {@link UnsignedLongs}.
 *

 *
 * <p>For serialization to work, the subclass must specify explicit {@code readObject} and {@code
 * writeObject} methods.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible
abstract class AbstractMapBasedMultiset<E extends @Nullable Object> extends AbstractMultiset<E>
    implements Serializable {
  // TODO(lowasser): consider overhauling this back to Map<E, Integer>
  private transient Map<E, Count> backingMap;