////

/// info

Щоб дізнатись більше про <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic, перегляньте його документацію</a>.

///

**FastAPI** повністю базується на Pydantic.

Ви побачите набагато більше цього всього на практиці в [Tutorial - User Guide](tutorial/index.md){.internal-link target=_blank}.

## Анотації типів у **FastAPI**

Se você quiser brincar com tokens JWT e ver como eles funcionam, visite <a href="https://jwt.io/" class="external-link" target="_blank">https://jwt.io</a>.

## Instalar `PyJWT`

Nós precisamos instalar o `PyJWT` para criar e verificar os tokens JWT em Python.

Certifique-se de criar um [ambiente virtual](../../virtual-environments.md){.internal-link target=_blank}, ativá-lo e então instalar o `pyjwt`:

<div class="termy">

```console

  * También puedes agregar [dependencias de `Security` con `scopes`](../advanced/security/oauth2-scopes.md){.internal-link target=_blank}.

/// tip | Consejo

    * Você também pode adicionar [dependências de `Segurança` com `scopes`](../advanced/security/oauth2-scopes.md){.internal-link target=_blank}.

/// tip | Dica

    for (int totalInsertions = 0; totalInsertions < 200; totalInsertions++) {

      List<Sink> sinks = new ArrayList<>();
      for (int chunkSize = 4; chunkSize <= 32; chunkSize++) {
        for (int bufferSize = chunkSize; bufferSize <= chunkSize * 4; bufferSize += chunkSize) {
          // yes, that's a lot of sinks!
          sinks.add(new Sink(chunkSize, bufferSize));

import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * Base class for services that can implement {@link #startUp}, {@link #run} and {@link #shutDown}
 * methods. This class uses a single thread to execute the service; consider {@link AbstractService}
 * if you would like to manage any threading manually.
 *
 * @author Jesse Wilson
 * @since 1.0
 */
@GwtIncompatible
@J2ktIncompatible

/**
 * A {@link ListenableFuture} whose result can be set by a {@link #set(Object)}, {@link
 * #setException(Throwable)} or {@link #setFuture(ListenableFuture)} call. It can also, like any
 * other {@code Future}, be {@linkplain #cancel cancelled}.
 *
 * <p>{@code SettableFuture} is the recommended {@code ListenableFuture} implementation when your

    * Contarme cómo usas FastAPI (me encanta oír eso).
    * Enterarte cuando hago anuncios o lanzo nuevas herramientas.
    * También puedes <a href="https://x.com/fastapi" class="external-link" target="_blank">seguir @fastapi en X (Twitter)</a> (una cuenta aparte).

import (
	"iter"
	"unicode"
	"unicode/utf8"
)

// Lines returns an iterator over the newline-terminated lines in the byte slice s.
// The lines yielded by the iterator include their terminating newlines.
// If s is empty, the iterator yields no lines at all.
// If s does not end in a newline, the final yielded line will not end in a newline.
// It returns a single-use iterator.
func Lines(s []byte) iter.Seq[[]byte] {

/**
 * Utility class for conversions related to {@link BigDecimal}.
 *
 * @author higa
 */
public abstract class BigDecimalConversionUtil {

    /**
     * Do not instantiate.
     */
    protected BigDecimalConversionUtil() {
    }

    /**
     * Converts to {@link BigDecimal}.
     *
     * @param o
     *            The object to convert
     * @return The converted {@link BigDecimal}
     */