* `seek(offset)`：移动至文件 `offset` （`int`）字节处的位置；
    * 例如，`await myfile.seek(0) ` 移动到文件开头；
    * 执行 `await myfile.read()` 后，需再次读取已读取内容时，这种方法特别好用；
* `close()`：关闭文件。

因为上述方法都是 `async` 方法，要搭配「await」使用。

例如，在 `async` *路径操作函数* 内，要用以下方式读取文件内容：

```Python
contents = await myfile.read()
```

在普通 `def` *路径操作函数*  内，则可以直接访问 `UploadFile.file`，例如：

```Python
contents = myfile.file.read()
```

/// note | `async` 技术细节

            long currentJavaTime = System.currentTimeMillis();
            long smbTime = currentJavaTime * 10000L + 116444736000000000L;

            SMBUtil.writeInt8(smbTime, buffer, 8);
            SMBUtil.writeInt8(smbTime, buffer, 16);
            SMBUtil.writeInt8(smbTime, buffer, 24);
            SMBUtil.writeInt8(smbTime, buffer, 32);

            // When
            response.readBytesWireFormat(buffer, 0);

	MinIOForceDelete = "x-minio-force-delete"

	// Create special flag to force create a bucket
	MinIOForceCreate = "x-minio-force-create"

	// Header indicates if the mtime should be preserved by client
	MinIOSourceMTime = "x-minio-source-mtime"

	// Header indicates if the etag should be preserved by client
	MinIOSourceETag = "x-minio-source-etag"

	// Writes expected write quorum

	testCases := []struct {
		modTime  time.Time
		days     ExpirationDays
		expected time.Time
	}{
		{
			time.Date(2020, time.March, 15, 10, 10, 10, 0, time.UTC),
			4,
			time.Date(2020, time.March, 20, 0, 0, 0, 0, time.UTC),
		},
		{
			time.Date(2020, time.March, 15, 0, 0, 0, 0, time.UTC),
			1,
			time.Date(2020, time.March, 17, 0, 0, 0, 0, time.UTC),
		},
	}

// ToEvent - converts to notification event.
func (args eventArgs) ToEvent(escape bool) event.Event {
	eventTime := UTCNow()
	uniqueID := fmt.Sprintf("%X", eventTime.UnixNano())
	if !args.Object.ModTime.IsZero() {
		uniqueID = fmt.Sprintf("%X", args.Object.ModTime.UnixNano())
	}

	respElements := map[string]string{
		"x-amz-request-id": args.RespElements["requestId"],
		"x-amz-id-2":       args.RespElements["nodeId"],

		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}
	if r.Header.Get(xMinIOExtract) == "true" && HasSuffix(object, archiveExt) {
		opts := ObjectOptions{VersionID: objInfo.VersionID, MTime: objInfo.ModTime}
		if _, err := updateObjectMetadataWithZipInfo(ctx, objectAPI, bucket, object, opts); err != nil {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}
	}

type BatchKeyRotateFilter struct {
	NewerThan     time.Duration `yaml:"newerThan,omitempty" json:"newerThan"`
	OlderThan     time.Duration `yaml:"olderThan,omitempty" json:"olderThan"`
	CreatedAfter  time.Time     `yaml:"createdAfter,omitempty" json:"createdAfter"`
	CreatedBefore time.Time     `yaml:"createdBefore,omitempty" json:"createdBefore"`

public class ReflectionTest extends TestCase {

  public void testGetPackageName() throws Exception {
    assertEquals("java.lang", Reflection.getPackageName(Iterable.class));
    assertEquals("java", Reflection.getPackageName("java.MyType"));
    assertEquals("java.lang", Reflection.getPackageName(Iterable.class.getName()));
    assertEquals("", Reflection.getPackageName("NoPackage"));
    assertEquals("java.util", Reflection.getPackageName(Map.Entry.class));
  }

	var objs []ObjectOpts
	curModTime := time.Date(2025, time.February, 10, 23, 0, 0, 0, time.UTC)
	for i := range 5 {
		obj := ObjectOpts{
			Name:        "obj",
			VersionID:   uuid.New().String(),
			ModTime:     curModTime.Add(time.Duration(-i) * time.Second),
			NumVersions: 5,
		}
		if i == 0 {
			obj.IsLatest = true
		} else {
			obj.SuccessorModTime = curModTime.Add(time.Duration(-i+1) * time.Second)
		}

	// many to many
	err = DB.Model(&emptyUser).Association("Languages").Delete(&user1.Languages)
	AssertEqual(t, err, gorm.ErrPrimaryKeyRequired)
}

type (
	myType           string
	emptyQueryClause struct {
		Field *schema.Field
	}
)

func (myType) QueryClauses(f *schema.Field) []clause.Interface {
	return []clause.Interface{emptyQueryClause{Field: f}}
}

func (sd emptyQueryClause) Name() string {