{!../../docs_src/events/tutorial002.py!}
```

Hier schreibt die `shutdown`-Eventhandler-Funktion eine Textzeile `"Application shutdown"` in eine Datei `log.txt`.

/// info

In der Funktion `open()` bedeutet `mode="a"` „append“ („anhängen“), sodass die Zeile nach dem, was sich in dieser Datei befindet, hinzugefügt wird, ohne den vorherigen Inhalt zu überschreiben.

///

/// tip | "Tipp"

        final StringBuffer urlBuf = request.getRequestURL();
        final String queryStr = request.getQueryString();
        if (queryStr != null) {
            urlBuf.append('?').append(queryStr);
        }

        final Map<String, List<String>> params = new HashMap<>();
        for (final Map.Entry<String, String[]> e : request.getParameterMap().entrySet()) {

	for scanner.Scan() {
		ekv, err := parsEnvEntry(scanner.Text())
		if err != nil {
			return nil, err
		}
		if ekv.Skip {
			// Skips empty lines
			continue
		}
		ekvs = append(ekvs, ekv)
	}
	if err = scanner.Err(); err != nil {
		return nil, err
	}
	return ekvs, nil
}

func readFromSecret(sp string) (string, error) {

			p.storage.setWriteAttribute(p.totalWrites.Add(1))
		}
		done(0, &err)
	}()

	// Copy inline data to a new buffer to function with deadlines.
	if len(fi.Data) > 0 {
		fi.Data = append(grid.GetByteBufferCap(len(fi.Data))[:0], fi.Data...)
	}
	return xioutil.WithDeadline[RenameDataResp](ctx, globalDriveConfig.GetMaxTimeout(), func(ctx context.Context) (res RenameDataResp, err error) {
		if len(fi.Data) > 0 {

        return splittingIterator(sequence);
      }

      @Override
      public String toString() {
        return Joiner.on(", ")
            .appendTo(new StringBuilder().append('['), this)
            .append(']')
            .toString();
      }
    };
  }

  private Iterator<String> splittingIterator(CharSequence sequence) {
    return strategy.iterator(this, sequence);
  }

	var rinfo ResyncTargetsInfo
	target := globalBucketTargetSys.GetRemoteBucketTargetByArn(ctx, bucket, tgtArns[0])
	target.ResetBeforeDate = UTCNow().AddDate(0, 0, -1*int(days/24))
	target.ResetID = resetID
	rinfo.Targets = append(rinfo.Targets, ResyncTarget{Arn: tgtArns[0], ResetID: target.ResetID})
	if err = globalBucketTargetSys.SetTarget(ctx, bucket, &target, true); err != nil {
		switch err.(type) {
		case RemoteTargetConnectionErr:

s3 := append(s2, s0...)            // append a slice              s3 == []int{0, 0, 2, 3, 5, 7, 0, 0}
s4 := append(s3[3:6], s3[2:]...)   // append overlapping slice    s4 == []int{3, 5, 7, 2, 3, 5, 7, 0, 0}

var t []interface{}
t = append(t, 42, 3.1415, "foo")   //                             t == []interface{}{42, 3.1415, "foo"}

var b []byte
b = append(b, "bar"...)            // append string contents      b == []byte{'b', 'a', 'r' }

.custom-file-label{border-top-left-radius:0;border-bottom-left-radius:0}.input-group-append,.input-group-prepend{display:-ms-flexbox;display:flex}.input-group-append .btn,.input-group-prepend .btn{position:relative;z-index:2}.input-group-append .btn:focus,.input-group-prepend .btn:focus{z-index:3}.input-group-append .btn+.btn,.input-group-append .btn+.input-group-text,.input-group-append .input-group-text+.btn,.input-group-append .input-group-text+.input-group-text,.input-group-prepend .btn+.btn,.input-group-prepend...

		if !ok {
			return true
		}
		obj, ok := value.(*currentPathTracker)
		if !ok {
			return true
		}
		strptr := (*string)(atomic.LoadPointer(obj.name))
		if strptr != nil {
			res = append(res, pathJoin(prefix, name, *strptr))
		}
		return true
	})
	return res
}

// activeDrives returns the number of currently active disks.
// (since this is concurrent it may not be 100% reliable)

    // TODO(cgdecker): Add CharSource.slice?
    StringBuilder builder = new StringBuilder();
    Reader reader = concatenated.openStream(); // no need to worry about closing
    for (int i = 0; i < 8; i++) {
      builder.append((char) reader.read());
    }
    assertEquals(expected, builder.toString());
  }

  static final CharSource BROKEN_READ_SOURCE = new TestCharSource("ABC", READ_THROWS);