## Conclusion { #conclusion }

With this you should have a basic understanding of what **environment variables** are and how to use them in Python.

You can also read more about them in the <a href="https://en.wikipedia.org/wiki/Environment_variable" class="external-link" target="_blank">Wikipedia for Environment Variable</a>.

Por padrão, o **FastAPI** irá converter automaticamente o valor do retorno para JSON utilizando o `jsonable_encoder` explicado em [JSON Compatible Encoder](../tutorial/encoder.md){.internal-link target=_blank}.

Então, por baixo dos panos, ele incluiria esses dados compatíveis com JSON (e.g. um `dict`) dentro de uma `JSONResponse` que é utilizada para enviar uma resposta para o cliente.

/// info | Info

Um Formulare zu verwenden, installieren Sie zuerst <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>.

Erstellen Sie unbedingt eine [virtuelle Umgebung](../virtual-environments.md){.internal-link target=_blank}, aktivieren Sie diese und installieren Sie dann das Paket, zum Beispiel:

```console
$ pip install python-multipart
```

///

import java.util.HashSet;
import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * Based on what a {@link Type} is, dispatch it to the corresponding {@code visit*} method. By
 * default, no recursion is done for type arguments or type bounds. But subclasses can opt to do
 * recursion by calling {@link #visit} for any {@code Type} while visitation is in progress. For

import java.nio.ByteBuffer;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import javax.crypto.Mac;

/**
 * {@link HashFunction} adapter for {@link Mac} instances.
 *
 * @author Kurt Alfred Kluever
 */
@Immutable
final class MacHashFunction extends AbstractHashFunction {

  @SuppressWarnings("Immutable") // cloned before each use

///

## Verwenden von `Annotated` im Typ für den `q`-Parameter { #use-annotated-in-the-type-for-the-q-parameter }

만약 JWT 토큰을 다뤄보고, 작동 방식도 알아보고 싶다면 <a href="https://jwt.io/" class="external-link" target="_blank">https://jwt.io</a> 을 확인하십시오.

## `PyJWT` 설치

파이썬으로 JWT 토큰을 생성하고 검증하려면 `PyJWT` 를 설치해야 합니다.

[가상환경](../../virtual-environments.md){.internal-link target=_blank} 을 만들고 활성화한 다음 `pyjwt` 를 설치하십시오:

<div class="termy">

```console
$ pip install pyjwt

---> 100%
```

Você pode fazer isso usando o <a href="https://docs.pydantic.dev/latest/concepts/validators/#field-after-validator" class="external-link" target="_blank">`AfterValidator` do Pydantic</a> dentro de `Annotated`.

/// tip | Dica

O Pydantic também tem <a href="https://docs.pydantic.dev/latest/concepts/validators/#field-before-validator" class="external-link" target="_blank">`BeforeValidator`</a> e outros. 🤓

///

import static org.junit.Assert.assertThat;

import org.junit.Test;

/**
 * @author wyukawa
 *
 */
public class SIndexOutOfBoundsExceptionTest {

    /**
     * Test method for
     * {@link org.codelibs.core.exception.ClIndexOutOfBoundsException#SIndexOutOfBoundsException()}
     * .
     */
    @Test
    public void testSIndexOutOfBoundsException() {

import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.Set;

/**
 * Optional features of classes derived from {@link Multiset}.
 *
 * @author Louis Wasserman
 */
@SuppressWarnings("rawtypes") // maybe avoidable if we rework the whole package?
@GwtCompatible
public enum MultisetFeature implements Feature<Multiset> {
  /**