## Instalar dependências { #install-dependencies }

Certifique-se de criar um [ambiente virtual](../virtual-environments.md){.internal-link target=_blank}, ativá-lo e instalar `jinja2`:

<div class="termy">

```console
$ pip install jinja2

---> 100%
```

</div>

## Usando `Jinja2Templates` { #using-jinja2templates }

It also includes what has changed, how validations are now more correct and strict, possible caveats, etc.

You can read it to understand better what has changed.

## Tests { #tests }

Make sure you have [tests](../tutorial/testing.md){.internal-link target=_blank} for your app and you run them on continuous integration (CI).

import static java.lang.annotation.RetentionPolicy.CLASS;

import com.google.common.annotations.GwtCompatible;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Annotates a "top-level" type-variable usage that takes its nullness from the type argument
 * supplied by the user of the class. For example, {@code Multiset.Entry.getElement()} returns

import static java.lang.annotation.RetentionPolicy.CLASS;

import com.google.common.annotations.GwtCompatible;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Annotates a "top-level" type-variable usage that takes its nullness from the type argument
 * supplied by the user of the class. For example, {@code Multiset.Entry.getElement()} returns

import static java.lang.annotation.RetentionPolicy.CLASS;

import com.google.common.annotations.GwtCompatible;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Annotates a "top-level" type-variable usage that takes its nullness from the type argument
 * supplied by the user of the class. For example, {@code Multiset.Entry.getElement()} returns

import static java.lang.annotation.RetentionPolicy.CLASS;

import com.google.common.annotations.GwtCompatible;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Annotates a "top-level" type-variable usage that takes its nullness from the type argument
 * supplied by the user of the class. For example, {@code Multiset.Entry.getElement()} returns

또한 의존관계에서 `Response` 매개변수를 선언하고, 해당 의존성에서 쿠키(및 헤더)를 설정할 수도 있습니다.

## `Response`를 직접 반환하기

코드에서 `Response`를 직접 반환할 때도 쿠키를 생성할 수 있습니다.

이를 위해 [Response를 직접 반환하기](response-directly.md){.internal-link target=_blank}에서 설명한 대로 응답을 생성할 수 있습니다.

그런 다음 쿠키를 설정하고 반환하면 됩니다:
{* ../../docs_src/response_directly/tutorial002.py hl[1,18] *}
/// tip

`Response` 매개변수를 사용하지 않고 응답을 직접 반환하는 경우, FastAPI는 이를 직접 반환한다는 점에 유의하세요.

# Configurar Swagger UI { #configure-swagger-ui }

Puedes configurar algunos <a href="https://swagger.io/docs/open-source-tools/swagger-ui/usage/configuration/" class="external-link" target="_blank">parámetros adicionales de Swagger UI</a>.

Para configurarlos, pasa el argumento `swagger_ui_parameters` al crear el objeto de la app `FastAPI()` o a la función `get_swagger_ui_html()`.

Pero en casos reales, al implementar seguridad, obtendrías más beneficios usando las [Utilidades de Seguridad integradas (el próximo capítulo)](../security/index.md){.internal-link target=_blank}.

///

## Errores de dependencias y valores de retorno { #dependencies-errors-and-return-values }

Puedes usar las mismas *funciones* de dependencia que usas normalmente.

/// info | Info

Um mehr über <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic zu erfahren, schauen Sie sich dessen Dokumentation an</a>.

///

**FastAPI** basiert vollständig auf Pydantic.

Viel mehr von all dem werden Sie in praktischer Anwendung im [Tutorial – Benutzerhandbuch](tutorial/index.md){.internal-link target=_blank} sehen.

/// tip | Tipp