*
 * <ul>
 *   <!-- TODO(kevinb): how can we make this not produce a warning when building gwt javadoc? -->
 *   <li>{@link StandardCharsets#US_ASCII} specifies the {@code Charset} of ASCII characters.
 *   <li>{@link CharMatcher#ascii} matches ASCII characters and provides text processing methods
 *       which operate only on the ASCII characters of a string.
 * </ul>
 *

.navbar-brand:hover{color:rgba(0,0,0,.9)}.navbar-light .navbar-nav .nav-link{color:rgba(0,0,0,.5)}.navbar-light .navbar-nav .nav-link:focus,.navbar-light .navbar-nav .nav-link:hover{color:rgba(0,0,0,.7)}.navbar-light .navbar-nav .nav-link.disabled{color:rgba(0,0,0,.3)}.navbar-light .navbar-nav .active>.nav-link,.navbar-light .navbar-nav .nav-link.active,.navbar-light .navbar-nav .nav-link.show,.navbar-light .navbar-nav .show>.nav-link{color:rgba(0,0,0,.9)}.navbar-light .navbar-toggler{color:rgba(0,0,...

 */
package org.codelibs.core.exception;

import static org.codelibs.core.collection.ArrayUtil.asArray;

import java.lang.reflect.Field;

/**
 * Exception thrown when accessing a non-{@literal static} {@link Field} without specifying an object.
 *
 * @author koichik
 */
public class FieldNotStaticRuntimeException extends ClRuntimeException {

    private static final long serialVersionUID = -7791347225750660981L;

 */
package org.codelibs.core.exception;

import static org.codelibs.core.collection.ArrayUtil.asArray;

import java.lang.reflect.Method;

/**
 * Exception thrown when accessing a non-{@literal static} {@link Method} without specifying an object.
 *
 * @author koichik
 */
public class MethodNotStaticRuntimeException extends ClRuntimeException {

    private static final long serialVersionUID = 7186052234464152208L;

 * governing permissions and limitations under the License.
 */
package org.codelibs.core.exception;

import static org.codelibs.core.collection.ArrayUtil.asArray;

/**
 * Exception that wraps {@link NoSuchFieldException}.
 *
 * @author higa
 */
public class NoSuchFieldRuntimeException extends ClRuntimeException {

    private static final long serialVersionUID = 6609175673610180338L;

    /**

<a href="https://github.com/mpdavis/python-jose" class="external-link" target="_blank">python-jose</a> erfordert zusätzlich ein kryptografisches Backend.

Hier verwenden wir das empfohlene: <a href="https://cryptography.io/" class="external-link" target="_blank">pyca/cryptography</a>.

/// tip | Tipp

Dieses Tutorial verwendete zuvor <a href="https://pyjwt.readthedocs.io/" class="external-link" target="_blank">PyJWT</a>.

Si quieres jugar con tokens JWT y ver cómo funcionan, revisa <a href="https://jwt.io/" class="external-link" target="_blank">https://jwt.io</a>.

## Instalar `PyJWT`

Necesitamos instalar `PyJWT` para generar y verificar los tokens JWT en Python.

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

<div class="termy">

```console

/**
 * A class that can supply objects of a single type; a pre-Java-8 version of {@link
 * java.util.function.Supplier java.util.function.Supplier}. Semantically, this could be a factory,
 * generator, builder, closure, or something else entirely. No guarantees are implied by this
 * interface.
 *
 * <p>The {@link Suppliers} class provides common suppliers and related utilities.
 *

import java.io.Reader;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit tests for {@link Closeables}.
 *
 * <p>Checks proper closing behavior, and ensures that IOExceptions on Closeable.close() are not
 * propagated out from the {@link Closeables#close} method if {@code swallowException} is true.
 *
 * @author Michael Lancaster
 */
@NullUnmarked

  void releaseResources(ReleaseResourcesReason reason) {
    super.releaseResources(reason);
    this.values = null;
  }

  abstract C combine(List<@Nullable Present<V>> values);

  /** Used for {@link Futures#allAsList} and {@link Futures#successfulAsList}. */
  static final class ListFuture<V extends @Nullable Object>
      extends CollectionFuture<V, List<@Nullable V>> {
    ListFuture(