code: def __init__(self, delimiter=", "):
      self.meters = defaultdict(SmoothedValue)
      self.delimiter = delimiter
  
imports: from collections import defaultdict, deque
  import torch
  from mmf.common.registry import registry
  from mmf.utils.distributed import reduce_dict
  from mmf.utils.general import scalarize_dict_values
label_desc: Use image node_id 1 to create a new Meter object  with example: obj = Meter(delimiter)