# 🔗 ⏮️ 🌾

FastAPI 🐕‍🦺 🔗 👈 <abbr title='sometimes also called "exit", "cleanup", "teardown", "close", "context managers", ...'>➕ 🔁 ⏮️ 🏁</abbr>.

👉, ⚙️ `yield` ↩️ `return`, &amp; ✍ ➕ 🔁 ⏮️.

/// tip

⚒ 💭 ⚙️ `yield` 1️⃣ 👁 🕰.

///

/// note | 📡 ℹ

🙆 🔢 👈 ☑ ⚙️ ⏮️:

* <a href="https://docs.python.org/3/library/contextlib.html#contextlib.contextmanager" class="external-link" target="_blank">`@contextlib.contextmanager`</a> ⚖️

Sehen wir uns das alles anhand eines Beispiels an.

Stellen Sie sich vor, Sie entwickeln eine Anwendung, mit der Sie Rechnungen erstellen können.

Diese Rechnungen haben eine `id`, einen optionalen `title`, einen `customer` (Kunde) und ein `total` (Gesamtsumme).

Der Benutzer Ihrer API (ein externer Entwickler) erstellt mit einem POST-Request eine Rechnung in Ihrer API.

Dann wird Ihre API (beispielsweise):

this._config.imageHeight&&a.height(this._config.imageHeight).width("auto"),t.append(a)}if(null!=this._config.icon&&t.append(n.default("<i />").addClass("mr-2").addClass(this._config.icon)),null!=this._config.title&&t.append(n.default("<strong />").addClass("mr-auto").html(this._config.title)),null!=this._config.subtitle&&t.append(n.default("<small />").html(this._config.subtitle)),1==this._config.close){var i=n.default('<button data-dismiss="toast" />').attr("type","button").addClass("ml-2 mb-1 ...

    * **Hızlı**: **NodeJS** ve **Go** ile eşit, çok yüksek performans (Starlette ve Pydantic'e teşekkürler).
    * **Sezgisel**: Editor desteğı. <abbr title="auto-complete, IntelliSense gibi isimlerle de bilinir">Otomatik tamamlama</abbr>. Daha az debugging.
    * **Kolay**: Kolay öğrenip kolay kullanmak için tasarlandı. Daha az döküman okuma daha çok iş.

        }

        public void columnTeletexTerminalIdentifier() {
            doColumn("teletexTerminalIdentifier");
        }

        public void columnTitle() {
            doColumn("title");
        }

        public void columnUidNumber() {
            doColumn("uidNumber");
        }

        public void columnX121Address() {
            doColumn("x121Address");
        }
    }

You can later read more about other middlewares in the [Advanced User Guide: Advanced Middleware](../advanced/middleware.md){.internal-link target=_blank}.

this.config.sanitizeFn)\n      }\n\n      $element.html(content)\n    } else {\n      $element.text(content)\n    }\n  }\n\n  getTitle() {\n    let title = this.element.getAttribute('data-original-title')\n\n    if (!title) {\n      title = typeof this.config.title === 'function' ?\n        this.config.title.call(this.element) :\n        this.config.title\n    }\n\n    return title\n  }\n\n  // Private\n  _getPopperConfig(attachment) {\n    const defaultBsConfig = {\n      placement: attachment,\n      modifiers:...

 * factory classes like:
 *
 * <pre>
 * interface Book {...}
 * public class Books {
 *   public static Book hardcover(String title) {...}
 *   public static Book paperback(String title) {...}
 * }
 * </pre>
 *
 * <p>And all the created {@code Book} instances can be tested with:
 *
 * <pre>
 * new ClassSanityTester()
 *     .forAllPublicStaticMethods(Books.class)

Todo el mismo proceso que se aplica para los parámetros de path también se aplica para los parámetros de query:

* Soporte del editor (obviamente)
* <abbr title="convirtiendo el string que viene de un request HTTP en datos de Python">"Parsing"</abbr> de datos
* Validación de datos
* Documentación automática

## Valores por defecto

* Alle Schlüsselwort-Argumente, die an die Taskfunktion übergeben werden sollen (`message="some notification"`).

## Dependency Injection