code: def on_epoch_end(self, epoch, logs=None):
      self._average_metrics_in_place(logs)
  
imports: from packaging import version
  import warnings
  import horovod.tensorflow
  import tensorflow
label_desc: Use image node_id 4 for calling the MetricAverageCallbackImpl obj's underlying member method code with example usage: obj.on_epoch_end(epoch, logs) without return types