return dst, io.EOF
		}
	}
	// Read until next line.
	in, err := r.buf.ReadBytes('\n')
	dst = append(dst, in...)
	return dst, err
}

// csvSplitSize is the size of each block.
// Blocks will read this much and find the first following newline.
// 128KB appears to be a very reasonable default.
const csvSplitSize = 128 << 10

// startReaders will read the header if needed and spin up a parser

			var a AccElem
			a.Size = atomic.LoadInt64(&old.Size)
			a.Total = atomic.LoadInt64(&old.Total)
			a.N = atomic.LoadInt64(&old.N)
			e.mu.Lock()
			e.lastMinuteLatency.addAll(t-1, a)
			e.mu.Unlock()
			acc = newAcc
		} else {
			// We may be able to grab the new accumulator by yielding.
			runtime.Gosched()
			acc = e.cached.Load()
		}
	}
	atomic.AddInt64(&acc.N, 1)

}

// Update the current settings and cycle all waiting.
// Parameters are the same as in the constructor.
func (d *dynamicSleeper) Update(factor float64, maxWait time.Duration) error {
	d.mu.Lock()
	defer d.mu.Unlock()
	if math.Abs(d.factor-factor) < 1e-10 && d.maxSleep == maxWait {
		return nil
	}
	// Update values and cycle waiting.
	xioutil.SafeClose(d.cycle)
	d.factor = factor
	d.maxSleep = maxWait

       * running under Jelly Bean or higher. But it seems safest to check.
       */
      if (version < jellyBean) {
        return new ThrowingCreator();
      }

      // Don't merge these catch() blocks, let alone use ReflectiveOperationException directly:
      // b/65343391
    } catch (NoSuchFieldException e) {
      // The JELLY_BEAN field doesn't exist because we're running on a version before Jelly Bean :)

		}
	}

	req := GetReqInfo(ctx)
	if req == nil {
		req = &ReqInfo{
			API:       "SYSTEM",
			RequestID: fmt.Sprintf("%X", time.Now().UTC().UnixNano()),
		}
	}
	req.RLock()
	defer req.RUnlock()

	API := "SYSTEM"
	switch {
	case req.API != "":
		API = req.API
	case subsystem != "":
		API += "." + subsystem
	}

	// Copy tags. We hold read lock already.

import java.nio.charset.Charset
import java.util.Collections
import java.util.Locale
import java.util.TimeZone
import java.util.concurrent.ThreadFactory
import java.util.concurrent.TimeUnit
import java.util.concurrent.locks.ReentrantLock
import kotlin.text.Charsets.UTF_16BE
import kotlin.text.Charsets.UTF_16LE
import kotlin.text.Charsets.UTF_32BE
import kotlin.text.Charsets.UTF_32LE
import kotlin.text.Charsets.UTF_8

				if kerrors.IsNotFound(err) {
					fmt.Fprintf(cmd.OutOrStdout(), "waypoint %v/%v not found\n", namespace, name)
				} else {
					mu.Lock()
					multiErr = multierror.Append(multiErr, err)
					mu.Unlock()
				}
			} else {
				fmt.Fprintf(cmd.OutOrStdout(), "waypoint %v/%v deleted\n", namespace, name)
			}
		}(name)
	}

	wg.Wait()
	return multiErr.ErrorOrNil()
}

{!../../docs_src/custom_response/tutorial008.py!}
```

1. Das ist die Generatorfunktion. Es handelt sich um eine „Generatorfunktion“, da sie `yield`-Anweisungen enthält.
2. Durch die Verwendung eines `with`-Blocks stellen wir sicher, dass das dateiähnliche Objekt geschlossen wird, nachdem die Generatorfunktion fertig ist. Also, nachdem sie mit dem Senden der Response fertig ist.

}

// ObjectInternalInfo contains some internal information about a given
// object, it will printed in listing calls with enabled metadata.
type ObjectInternalInfo struct {
	K int // Data blocks
	M int // Parity blocks
}

// Object container for object metadata
type Object struct {
	Key          string
	LastModified string // time string of format "2006-01-02T15:04:05.000Z"
	ETag         string

**FastAPI** uses them internally to achieve this.

///

## Dependencies with `yield` and `HTTPException`

You saw that you can use dependencies with `yield` and have `try` blocks that catch exceptions.

The same way, you could raise an `HTTPException` or similar in the exit code, after the `yield`.

/// tip