## 使用`jsonable_encoder`

让我们假设你有一个数据库名为`fake_db`，它只能接收与JSON兼容的数据。

例如，它不接收`datetime`这类的对象，因为这些对象与JSON不兼容。

因此，`datetime`对象必须将转换为包含<a href="https://en.wikipedia.org/wiki/ISO_8601" class="external-link" target="_blank">ISO格式化</a>的`str`类型对象。

同样，这个数据库也不会接收Pydantic模型（带有属性的对象），而只接收`dict`。

对此你可以使用`jsonable_encoder`。

它接收一个对象，比如Pydantic模型，并会返回一个JSON兼容的版本：

import okio.Buffer
import okio.Source
import okio.Timeout
import okio.buffer

/** Serves requests from the cache and writes responses to the cache. */
class CacheInterceptor(
  internal val call: RealCall,
  internal val cache: Cache?,
) : Interceptor {
  @Throws(IOException::class)
  override fun intercept(chain: Interceptor.Chain): Response {
    val cacheCandidate = cache?.get(chain.request().requestForCache())

import jcifs.internal.util.SMBUtil;

/**
 * Represents a byte range for SMB1 locking and unlocking operations.
 *
 * This class encapsulates the information about a byte range that needs
 * to be locked or unlocked, including the process ID, offset, and length.
 *
 * @author mbechler
 */
public class LockingAndXRange implements Encodable, Decodable {

    private final boolean largeFile;
    private int pid;

import jcifs.internal.util.SMBUtil;

/**
 * Base class for SMB1 NT Transaction request messages.
 *
 * NT Transactions are an extended form of the basic transaction protocol
 * that provides additional functionality for Windows NT-specific operations
 * such as security descriptor queries and file change notifications.
 */
public abstract class SmbComNtTransaction extends SmbComTransaction {

    // relative to headerStart

import static org.junit.jupiter.api.Assertions.assertTrue;

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

/**
 * Test class for NtStatus constants
 */
@DisplayName("NtStatus Tests")
class NtStatusTest {

    @Test
    @DisplayName("Should define well-known NT status constants")
    void testWellKnownStatusConstants() {

 *
 * If the chain is for an application interceptor then [exchange] must be null. Otherwise it is for
 * a network interceptor and [exchange] must be non-null.
 */
class RealInterceptorChain(
  internal val call: RealCall,
  private val interceptors: List<Interceptor>,
  private val index: Int,
  internal val exchange: Exchange?,
  internal val request: Request,

// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
@IgnoreJRERequirement // We opt into library desugaring for our tests.
public class MapReplaceAllTester<K, V> extends AbstractMapTester<K, V> {
  private SampleElements<K> keys() {
    return new SampleElements<>(k0(), k1(), k2(), k3(), k4());
  }

  private SampleElements<V> values() {

import java.util.Random;
import org.jspecify.annotations.NullUnmarked;

/**
 * Benchmarks for various algorithms for computing the mean and/or variance.
 *
 * @author Louis Wasserman
 */
@NullUnmarked
public class StatsBenchmark {

  enum MeanAlgorithm {
    SIMPLE {
      @Override
      double mean(double[] values) {
        double sum = 0.0;
        for (double value : values) {
          sum += value;
        }

/**
 * This implementation of {@link BuildResumptionDataRepository} persists information in a properties file. The file is
 * stored in the build output directory under the Maven execution root.
 */
@Named
@Singleton
public class DefaultBuildResumptionDataRepository implements BuildResumptionDataRepository {
    private static final String RESUME_PROPERTIES_FILENAME = "resume.properties";
    private static final String REMAINING_PROJECTS = "remainingProjects";

## Instala dependencias { #install-dependencies }

Asegúrate de crear un [entorno virtual](../virtual-environments.md){.internal-link target=_blank}, activarlo e instalar `jinja2`:

<div class="termy">

```console
$ pip install jinja2

---> 100%
```

</div>

## Usando `Jinja2Templates` { #using-jinja2templates }

* Importa `Jinja2Templates`.