class_docstr: A grouping of AverageMeters.
code: def __init__(self):
      self._batch_count = 0
      self.n = 0
      self._meters = collections.defaultdict(AverageMeter)
  
imports: import collections
  from contextlib import closing, contextmanager
  import logging
  import numpy
  import socket
  import time
label_desc: Use image node_id 1 to create a new AverageMeterCollection object  with example: obj = AverageMeterCollection()