# `yield` ile Dependency'ler { #dependencies-with-yield }

FastAPI, işini bitirdikten sonra <dfn title='bazen "exit code", "cleanup code", "teardown code", "closing code", "context manager exit code" vb. olarak da adlandırılır'>ek adımlar</dfn> çalıştıran dependency'leri destekler.

Bunu yapmak için `return` yerine `yield` kullanın ve ek adımları (kodu) `yield` satırından sonra yazın.

/// tip | İpucu

Using `Depends(scope="function")`, the exit code after `yield` is executed right after the *path operation function* is finished, before the response is sent back to the client.

And when using `Depends(scope="request")` (the default), the exit code after `yield` is executed after the response is sent.

///

## Early exit and `scope` { #early-exit-and-scope }

Normally the exit code of dependencies with `yield` is executed **after the response** is sent to the client.

            sys.exit(0)

        today = date.today().isoformat()
        lines[i] = f"## {version} ({today})\n"
        print(f"Added date: {version} ({today})")

        with open(RELEASE_NOTES_FILE, "w") as f:
            f.writelines(lines)
        sys.exit(0)

    print("No release header found")
    sys.exit(1)


if __name__ == "__main__":

/// info | Info

Wie Sie unten sehen werden, ähnelt dies sehr dem Verhalten vor Version 0.106.0, jedoch mit mehreren Verbesserungen und Bugfixes für Sonderfälle.

///

#### Anwendungsfälle mit frühem Exit-Code { #use-cases-with-early-exit-code }

            System.exit(2);
        }

        Path propsPath = Paths.get("gradle.properties");
        if (!Files.exists(propsPath)) {
            System.err.println("gradle.properties not found at: " + propsPath.toAbsolutePath());
            System.exit(2);
        }

        Map<String, String> props = readProperties(propsPath);

# Abhängigkeiten mit `yield` { #dependencies-with-yield }

FastAPI unterstützt Abhängigkeiten, die einige <dfn title="manchmal auch genannt: „Exit Code“, „Cleanup Code“, „Teardown Code“, „Closing Code“, „Kontextmanager Exit Code“, usw.">zusätzliche Schritte nach Abschluss</dfn> ausführen.

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

/// tip | Tipp

            ByteArrayOutputStream errContent = new ByteArrayOutputStream();
            System.setErr(new PrintStream(errContent));

            String[] args = { "--help" };
            // Note: main calls System.exit, so we can't test it directly
            // Instead, we test the parsing logic separately

            System.setErr(originalErr);
        } catch (Exception e) {
            System.setErr(originalErr);
        }

## Dependencies with `yield` and `scope`

When using dependencies with `yield`, they can have a `scope` that defines when the exit code is run.

Use the default scope `"request"` to run the exit code after the response is sent back.

```python
from typing import Annotated

from fastapi import Depends, FastAPI

app = FastAPI()


def get_db():

                en_doc_lines=original_content.splitlines(),
                lang_code=language,
                auto_fix=False,
                path=str(out_path),
            )
            break  # Exit loop if no errors
        except ValueError as e:
            print(
                f"Translation check failed on attempt {attempt_no}/{MAX_ATTEMPTS}: {e}"
            )