* <p>
 * This interface provides methods for logging messages at different severity levels
 * and supports logging with or without associated exceptions.
 *
 * @since 4.0.0
 */
@Experimental
public interface Logger {

    /**
     * Represents the severity levels for log messages.
     */
    enum Level {
        DEBUG,
        INFO,
        WARN,
        ERROR
    }

    /**

# Bigger Applications - Multiple Files { #bigger-applications-multiple-files }

If you are building an application or a web API, it's rarely the case that you can put everything in a single file.

**FastAPI** provides a convenience tool to structure your application while keeping all the flexibility.

/// info

If you come from Flask, this would be the equivalent of Flask's Blueprints.

///

## An example file structure { #an-example-file-structure }

* 📤 📁 `app/internal/` ⏮️ ➕1️⃣ 📁 `__init__.py`, ⚫️ ➕1️⃣ "🐍 📦": `app.internal`.
*  & 📁 `app/internal/admin.py` ➕1️⃣ 🔁: `app.internal.admin`.

<img src="/img/tutorial/bigger-applications/package.drawio.svg">

🎏 📁 📊 ⏮️ 🏤:

```
.
├── app                  # "app" is a Python package
│   ├── __init__.py      # this file makes "app" a "Python package"

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

You can configure some extra <a href="https://swagger.io/docs/open-source-tools/swagger-ui/usage/configuration/" class="external-link" target="_blank">Swagger UI parameters</a>.

To configure them, pass the `swagger_ui_parameters` argument when creating the `FastAPI()` app object or to the `get_swagger_ui_html()` function.

`swagger_ui_parameters` receives a dictionary with the configurations passed to Swagger UI directly.

# Configurar 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()`.

`swagger_ui_parameters` recibe un diccionario con las configuraciones pasadas directamente a Swagger UI.

# Swagger UI 구성

추가적인 <a href="https://swagger.io/docs/open-source-tools/swagger-ui/usage/configuration/" class="external-link" target="_blank">Swagger UI 매개변수</a>를 구성할 수 있습니다.

구성을 하려면, `FastAPI()` 앱 객체를 생성할 때 또는 `get_swagger_ui_html()` 함수에 `swagger_ui_parameters` 인수를 전달하십시오.

`swagger_ui_parameters`는 Swagger UI에 직접 전달된 구성을 포함하는 딕셔너리를 받습니다.

FastAPI는 이 구성을 **JSON** 형식으로 변환하여 JavaScript와 호환되도록 합니다. 이는 Swagger UI에서 필요로 하는 형식입니다.

## 구문 강조 비활성화

* Und die Datei `app/internal/admin.py` ist ein weiteres Submodul: `app.internal.admin`.

<img src="/img/tutorial/bigger-applications/package.drawio.svg">

Die gleiche Dateistruktur mit Kommentaren:

```
.
├── app                  # „app“ ist ein Python-Package
│   ├── __init__.py      # diese Datei macht „app“ zu einem „Python-Package“

* Подкаталог `app/internal/`, содержащий файл `__init__.py`, является ещё одним суб-пакетом: `app.internal`.
* А файл `app/internal/admin.py` является ещё одним суб-модулем: `app.internal.admin`.

<img src="/img/tutorial/bigger-applications/package.drawio.svg">

Та же самая файловая структура приложения, но с комментариями:

```
.
├── app                  # "app" пакет
│   ├── __init__.py      # этот файл превращает "app" в "Python-пакет"

# Configurar Swagger UI

Você pode configurar alguns <a href="https://swagger.io/docs/open-source-tools/swagger-ui/usage/configuration/" class="external-link" target="_blank">parâmetros extras da UI do Swagger</a>.

Para configurá-los, passe o argumento `swagger_ui_parameters` ao criar o objeto de aplicativo `FastAPI()` ou para a função `get_swagger_ui_html()`.

`swagger_ui_parameters` recebe um dicionário com as configurações passadas diretamente para o Swagger UI.

* Y el archivo `app/internal/admin.py` es otro submódulo: `app.internal.admin`.

<img src="/img/tutorial/bigger-applications/package.drawio.svg">

La misma estructura de archivos con comentarios:

```
.
├── app                  # "app" es un paquete de Python