code: def compute(self):
      return self.output_sums / self.size
  
file_path: poutyne/poutyne/framework/metrics/decomposable.py
imports: from typing import Iterable, Mapping
  import numpy
  import torch
  import torch.nn
  from poutyne.framework.metrics.base import Metric
  from poutyne.utils import get_batch_size
label_desc: Use image node_id 6 for calling the DecomposableMetric obj's underlying member method code with example usage: obj.compute() and returns: unknown