# yield를 사용하는 의존성

FastAPI는 <abbr title='때로는 "종료 코드", "정리 코드", "종료 처리 코드", "닫기 코드", "컨텍스트 관리자 종료 코드" 등으로도 불립니다'>작업 완료 후 추가 단계를 수행하는</abbr> 의존성을 지원합니다.

이를 구현하려면 `return` 대신 `yield`를 사용하고, 추가로 실행할 단계 (코드)를 그 뒤에 작성하세요.

/// tip | 팁

각 의존성마다 `yield`는 한 번만 사용해야 합니다.

///

/// note | 기술 세부사항

다음과 함께 사용할 수 있는 모든 함수:

package tests_test

import (
	"database/sql"
	"encoding/json"
	"reflect"
	"sort"
	"sync/atomic"
	"testing"

	"gorm.io/gorm"
)

func toJSONString(v interface{}) []byte {
	r, _ := json.Marshal(v)
	return r
}

func TestNestedPreload1(t *testing.T) {
	type (
		Level1 struct {
			ID       uint
			Value    string
			Level2ID uint
		}
		Level2 struct {
			ID       uint
			Level1   Level1

                            groupId, artifactId, (VersionRange) null, scope, type, classifier, artifactHandler, false));
        }
    }

    static Stream<Arguments> invalidMavenCoordinates() {
        return Stream.of(
                Arguments.of(null, null, null),
                Arguments.of("", "", ""),
                Arguments.of(null, "artifactId", "1.0"),
                Arguments.of("", "artifactId", "1.0"),

    content: String? = null,
    fn: (okio.Path) -> T,
  ): T {
    FileSystem.SYSTEM.write(filePath) {
      if (content != null) {
        writeUtf8(content)
      }
    }

    return fn(filePath)
  }

🏧 😐 🌐❔ 👆 💭 👆 💪 🔗 🤙 🔠 🔁 (🎲 💗 🕰) 🎏 📨 ↩️ ⚙️ "💾" 💲, 👆 💪 ⚒ 🔢 `use_cache=False` 🕐❔ ⚙️ `Depends`:

```Python hl_lines="1"
async def needy_dependency(fresh_value: str = Depends(get_value, use_cache=False)):
    return {"fresh_value": fresh_value}
```

## 🌃

↖️ ⚪️➡️ 🌐 🎀 🔤 ⚙️ 📥, **🔗 💉** ⚙️ 🙅.

🔢 👈 👀 🎏 *➡ 🛠️ 🔢*.

✋️, ⚫️ 📶 🏋️, & ✔ 👆 📣 🎲 🙇 🐦 🔗 "📊" (🌲).

/// tip

    new IteratorTester<E>(
        Platform.collectionIteratorTesterNumIterations(), features, elements, knownOrder) {
      @Override
      protected Iterator<E> newTargetIterator() {
        resetCollection();
        return collection.iterator();
      }

      @Override
      protected void verify(List<E> elements) {
        expectContents(elements);
      }
    }.test();
  }

                    throws IOException, ServletException {
                if (skipAuthentication) {
                    return null;
                }
                return super.negotiate(req, resp, skipAuthentication);
            }

            @Override

                try {
                    Thread.sleep(2000);
                } catch (InterruptedException e) {
                    throw new CrawlingAccessException(e);
                }
                return null;
            }
        };
        client.setAccessTimeout(1);
        try {
            client.doGet("smb://localhost/test.txt");
            fail();
        } catch (CrawlingAccessException e) {

@SuppressSignatureCheck
sealed class CallEvent {
  abstract val timestampNs: Long
  abstract val call: Call

  val name: String
    get() = javaClass.simpleName

  /** Returns if the event closes this event, or null if this is no open event. */
  open fun closes(event: CallEvent): Boolean? = null

  data class ProxySelectStart(
    override val timestampNs: Long,
    override val call: Call,

When reading response a header, use `header(name)` to return the _last_ occurrence of the named value. Usually this is also the only occurrence! If no value is present, `header(name)` will return null. To read all of a field's values as a list, use `headers(name)`.

To visit all headers, use the `Headers` class which supports access by index.