code: def reset(self) -> None:
      self.output_sums = np.zeros(len(self.names))
      self.size = 0
  
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 7 for calling the DecomposableMetric obj's underlying member method code with example usage: obj.reset() without return types