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# Abhängigkeiten mit yield

FastAPI unterstützt Abhängigkeiten, die nach Abschluss einige <abbr title="Manchmal auch genannt „Exit Code“, „Cleanup Code“, „Teardown Code“, „Closing Code“, „Kontext Manager Exit Code“, usw.">zusätzliche Schritte ausführen</abbr>.

Verwenden Sie dazu `yield` statt `return` und schreiben Sie die zusätzlichen Schritte / den zusätzlichen Code danach.

/// tip | Tipp

Stellen Sie sicher, dass Sie `yield` nur einmal pro Abhängigkeit verwenden.

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* Python <a href="https://github.com/fastapi/fastapi" class="external-link" target="_blank">**FastAPI**</a> バックエンド:
    * **高速**: **NodeJS** や **Go** 並みのとても高いパフォーマンス (Starlette と Pydantic のおかげ)。
    * **直感的**: 素晴らしいエディタのサポートや <abbr title="自動補完、インテリセンスとも呼ばれる">補完。</abbr> デバッグ時間の短縮。
    * **簡単**: 簡単に利用、習得できるようなデザイン。ドキュメントを読む時間を削減。
    * **短い**: コードの重複を最小限に。パラメータ宣言による複数の機能。
    * **堅牢性**: 自動対話ドキュメントを使用した、本番環境で使用できるコード。