class_docstr: Computes and stores the average and current value.
class_docstr_tok: ["Computes","and","stores","the","average","and","current","value","."]
code: def update(self, val, n=1):
      self.val = val
      self.sum += val * n
      self.count += n
      self.avg = self.sum / self.count
  
imports: import time
  import numbers
  import socket
  import collections
  import numpy
  from contextlib import closing, contextmanager
  import torch
  from bigdl.dllib.utils.log4Error import *
label_desc: Use image node_id 3 for calling the AverageMeter obj's underlying member method code with example usage: obj.update(val, n) without return types