# yieldを持つ依存関係

FastAPIは、いくつかの<abbr title='時々"exit"、"cleanup"、"teardown"、"close"、"context managers"、 ...のように呼ばれる'>終了後の追加のステップ</abbr>を行う依存関係をサポートしています。

これを行うには、`return`の代わりに`yield`を使い、その後に追加のステップを書きます。

/// tip | "豆知識"

`yield`は必ず一度だけ使用するようにしてください。

///

/// info | "情報"

これを動作させるには、**Python 3.7** 以上を使用するか、**Python 3.6** では"backports"をインストールする必要があります:

```
pip install async-exit-stack async-generator
```

	// We stagger listings only on HDDs.
	if info.Rotational == nil || *info.Rotational {
		s.rotational = true
		s.walkMu = &sync.Mutex{}
		s.walkReadMu = &sync.Mutex{}
	}

	if cleanUp {
		bgFormatErasureCleanupTmp(s.drivePath) // cleanup any old data.
	}

	formatData, formatFi, err := formatErasureMigrate(s.drivePath)
	if err != nil && !errors.Is(err, os.ErrNotExist) {
		if os.IsPermission(err) {

 * entries may be counted in {@link Cache#size}, but will never be visible to read or write
 * operations.
 *
 * <p>Certain cache configurations will result in the accrual of periodic maintenance tasks which
 * will be performed during write operations, or during occasional read operations in the absence of

		"warning.json":     warningsJSON,
		"invalidYAML.json": invalidJSON,
	})
	validTempDirJSON := createTestDirectory(t, map[string]string{
		"valid.json": validJSON,
	})

	t.Cleanup(func() {
		os.RemoveAll(tempDirYAML)
		os.RemoveAll(validTempDirYAML)
		os.RemoveAll(tempDirJSON)
		os.RemoveAll(validTempDirJSON)
	})

	cases := []struct {
		name           string

    - [Node Binaries](#node-binaries)
  - [Changelog since v1.15.11](#changelog-since-v11511)
  - [Changes by Kind](#changes-by-kind)
    - [Bug or Regression](#bug-or-regression)
    - [Other (Cleanup or Flake)](#other-cleanup-or-flake)
- [v1.15.11](#v11511)
  - [Downloads for v1.15.11](#downloads-for-v11511)
    - [Client Binaries](#client-binaries-1)
    - [Server Binaries](#server-binaries-1)
    - [Node Binaries](#node-binaries-1)

    - [DNS](#dns)
    - [DNS Autoscaler](#dns-autoscaler)
    - [Cluster Autoscaler](#cluster-autoscaler-1)
    - [Cluster Load Balancing](#cluster-load-balancing)
    - [etcd Empty Dir Cleanup](#etcd-empty-dir-cleanup)
    - [Fluentd](#fluentd)
    - [Heapster](#heapster)
    - [Registry](#registry)
  - [External Dependency Version Information](#external-dependency-version-information)

	XOR $1234567, R5                // 6ca5001268a5d687
	XOR $1234567, R5, R3            // 6ca300126863d687
	XORIS $15, R3, R4               // 6c64000f
	XOR   $983040, R3, R4           // 6c64000f

	// TODO: cleanup inconsistency of printing CMPx opcodes with explicit CR arguments.
	CMP R3, R4                      // 7c232000
	CMP R3, R0                      // 7c230000
	CMP R3, R0, CR1                 // CMP R3,CR1,R0   // 7ca30000

        "cpu": "k8",
        "copt": "-mno-sse4.2",
    },
    visibility = ["//visibility:public"],
)

# This condition takes precedence over :linux_x86_64
# TODO(b/290533709): Remove this with PJRT build rule cleanup.
config_setting(
    name = "linux_x86_64_with_weightwatcher",
    constraint_values = if_google(
        ["//third_party/bazel_platforms/os:linux"],
        [],
    ),

		leaves = leaves[1:]
	}
}

// forceCompact will force compact the cache of the top entry.
// If the number of children is more than limit*100, it will compact self.
// When above the limit a cleanup will also be performed to remove any possible abandoned entries.
func (d *dataUsageCache) forceCompact(limit int) {
	if d == nil || len(d.Cache) <= limit {
		return
	}
	top := hashPath(d.Info.Name).Key()

			for attempts <= 3 {
				aerr := api.AbortMultipartUpload(ctx, tgtBucket, tgtObject, res.UploadID, ObjectOptions{})
				if aerr == nil {
					return
				}
				batchLogIf(ctx,
					fmt.Errorf("trying %s: Unable to cleanup failed multipart replication %s on remote %s/%s: %w - this may consume space on remote cluster",
						humanize.Ordinal(attempts), res.UploadID, tgtBucket, tgtObject, aerr))
				attempts++
				time.Sleep(time.Second)
			}