Você pode usar esse _template_ para começar, já que ele inclui várias configurações iniciais, segurança, banco de dados, e alguns _endpoints_ de API já feitos para você.

Repositório GitHub: <a href="https://github.com/tiangolo/full-stack-fastapi-template" class="external-link" target="_blank">Full Stack FastAPI Template</a>

import okhttp3.internal.format
import okio.ByteString.Companion.encodeUtf8

object Http2 {
  @JvmField
  val CONNECTION_PREFACE = "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n".encodeUtf8()

  /** The initial max frame size, applied independently writing to, or reading from the peer. */
  const val INITIAL_MAX_FRAME_SIZE = 0x4000 // 16384

  const val TYPE_DATA = 0x0
  const val TYPE_HEADERS = 0x1
  const val TYPE_PRIORITY = 0x2

    /** Cache for page paths */
    protected final Map<String, String> pageCacheMap = new ConcurrentHashMap<>();

    /** Initial facet parameter mappings */
    protected final Map<String, String> initFacetParamMap = new HashMap<>();

    /** Initial geographic parameter mappings */
    protected final Map<String, String> initGeoParamMap = new HashMap<>();

    /** List of facet query views */

     */
    public GroupPager() {
        // Default constructor
    }

    /**
     * Clears all pagination data and search criteria, resetting the pager to its initial state.
     * This method resets record counts, pagination flags, and search parameters to their default values.
     */
    public void clear() {
        allRecordCount = 0;
        allPageCount = 0;

    tester.testFailedFuture("failure");
  }

  public void testCancel() throws Exception {
    assertTrue(future.cancel(true));
    tester.testCancelledFuture();
  }

  /** Tests the initial state of the future. */
  public void testCreate() throws Exception {
    SettableFuture<Integer> future = SettableFuture.create();
    assertFalse(future.isDone());
    assertFalse(future.isCancelled());
  }

        return sval;
    }

    /**
     * Advances to the next token.
     *
     * @return The type of the token.
     */
    public int nextToken() {
        initVal();
        if (processEOF()) {
            return ttype;
        }
        if (processWhitespace()) {
            return ttype;
        }
        if (processWord()) {
            return ttype;

    protected final String settingsId;

    /** The OpenSearch client. */
    protected final Client client;

    /** The settings index name. */
    protected final String settingsIndexName;

    /** The initial settings. */
    protected final Map<String, Object> initialSettings;

    /** Flag indicating if the settings are initialized. */
    protected boolean initialized = false;

    /** The bad word index name. */

        Plugin retrievedPlugin = project.getPlugin("org.apache.maven.plugins:maven-compiler-plugin");
        assertNotNull(retrievedPlugin, "Plugin should be found");
        assertEquals("3.8.1", retrievedPlugin.getVersion(), "Initial version should match");

        // Modify the plugin version
        retrievedPlugin.setVersion("3.11.0");

        // Verify the change persists when getting the plugin again

 * header, or they may decline the challenge by returning null. In this case the unauthenticated
 * response will be returned to the caller that triggered it.
 *
 * Implementations should check if the initial request already included an attempt to
 * authenticate. If so it is likely that further attempts will not be useful and the authenticator
 * should give up.
 *

## Guía oficial { #official-guide }

Pydantic tiene una <a href="https://docs.pydantic.dev/latest/migration/" class="external-link" target="_blank">Guía de migración</a> oficial de v1 a v2.

También incluye qué cambió, cómo las validaciones ahora son más correctas y estrictas, posibles consideraciones, etc.