fake_database = initial_fake_database.copy()

initial_state = {"except": False, "finally": False}

state = initial_state.copy()

app = FastAPI()


async def get_database():
    temp_database = fake_database.copy()
    try:
        yield temp_database
        fake_database.update(temp_database)
    except HTTPException:
        state["except"] = True
        raise
    finally:
        state["finally"] = True

 *
 * @author Louis Wasserman
 */
final class LongAddables {
  private static final Supplier<LongAddable> SUPPLIER;

  static {
    Supplier<LongAddable> supplier;
    try {
      // trigger static initialization of the LongAdder class, which may fail
      LongAdder unused = new LongAdder();
      supplier =
          new Supplier<LongAddable>() {
            @Override

		cause:      err,
	}
}

func errJSONParsingError(err error) *s3Error {
	return &s3Error{
		code:       "JSONParsingError",
		message:    "Encountered an error parsing the JSON file. Check the file and try again.",
		statusCode: 400,
		cause:      err,
	}

 *
 * ```kotlin
 * @JvmField @Rule val serverRule = MockWebServerRule()
 * ```
 */
class MockWebServerRule : ExternalResource() {
  val server: MockWebServer = MockWebServer()

  override fun before() {
    try {
      server.start()
    } catch (e: IOException) {
      throw RuntimeException(e)
    }
  }

  override fun after() {
    server.close()
  }

import org.apache.maven.api.cli.Options;
import org.apache.maven.cling.invoker.BaseParser;

public class EncryptParser extends BaseParser {
    @Override
    protected Options parseCliOptions(LocalContext context) {
        try {
            return CommonsCliEncryptOptions.parse(context.parserRequest.args().toArray(new String[0]));
        } catch (ParseException e) {

En tu ruta de WebSocket puedes `await` para recibir mensajes y enviar mensajes.

{* ../../docs_src/websockets/tutorial001_py39.py hl[48:52] *}

Puedes recibir y enviar datos binarios, de texto y JSON.

## Pruébalo { #try-it }

Si tu archivo se llama `main.py`, ejecuta tu aplicación con:

<div class="termy">

```console
$ fastapi dev main.py

          .isEqualTo(expected);
    }
  }

  public void testValueOfLong() {
    for (long value : TEST_LONGS) {
      boolean expectSuccess = value >= 0;
      try {
        assertThat(UnsignedLong.valueOf(value).longValue()).isEqualTo(value);
        assertThat(expectSuccess).isTrue();
      } catch (IllegalArgumentException e) {
        assertThat(expectSuccess).isFalse();
      }

  private static ImmutableList<URL> parseJavaClassPath() {
    ImmutableList.Builder<URL> urls = ImmutableList.builder();
    for (String entry : Splitter.on(PATH_SEPARATOR.value()).split(JAVA_CLASS_PATH.value())) {
      try {
        try {
          urls.add(new File(entry).toURI().toURL());
        } catch (SecurityException e) { // File.toURI checks to see if the file is a directory

        Editor editor = new Editor(pomDocument);
        Element root = editor.root();
        if (root == null) {
            return MODEL_VERSION_4_0_0;
        }

        // First try to get from modelVersion element
        Element modelVersionElement = root.child(MODEL_VERSION).orElse(null);
        if (modelVersionElement != null) {
            String modelVersion = modelVersionElement.textContentTrimmed();

  public void testLog2Exact() {
    for (BigInteger x : POSITIVE_BIGINTEGER_CANDIDATES) {
      // We only expect an exception if x was not a power of 2.
      boolean isPowerOf2 = BigIntegerMath.isPowerOfTwo(x);
      try {
        assertEquals(x, ZERO.setBit(BigIntegerMath.log2(x, UNNECESSARY)));
        assertTrue(isPowerOf2);
      } catch (ArithmeticException e) {
        assertFalse(isPowerOf2);
      }
    }
  }