class_docstr: Measures training stats.
code: def iter_toc(self):
      self.iter_timer.toc()
  
imports: from collections import deque
  import numpy
  import pycls.core.logging
  import torch
  from pycls.core.config import cfg
  from pycls.core.timer import Timer
label_desc: Use image node_id 4 for calling the TrainMeter obj's underlying member method code with example usage: obj.iter_toc() without return types