class_docstr: Trigger invoked when key value getting bigger or lower than before.
  
  Args:
      key (str) : Key of value.
      compare_fn ((float, float) -> bool) : Function to compare the values.
      trigger (tuple(int, str)) : Trigger that decide the comparison interval.
class_docstr_tok: ["Trigger","invoked","when","key","value","getting","bigger","or","lower","than","before",".","Args",":","key","(","str",")",":","Key","of","value",".","compare_fn","(","(","float",",","float",")","-",">","bool",")",":","Function","to","compare","the","values",".","trigger","(","tuple","(","int",",","str",")",")",":","Trigger","that","decide","the","comparison","interval","."]
code: def _init_summary(self):
      import chainer
  
      self._summary = chainer.reporter.DictSummary()
  
imports: import argparse
  import copy
  import json
  import logging
  import os
  import shutil
  import tempfile
  import numpy
  import torch
label_desc: Use image node_id 3 for calling the CompareValueTrigger obj's underlying member method code with example usage: obj._init_summary() without return types