class_docstr: Implementation of perl's autovivification feature.
code: def __getitem__(self, item):
      try:
          return dict.__getitem__(self, item)
      except KeyError:
          value = self[item] = type(self)()
      return value
  
file_path: insightface/recognition/arcface_paddle/tools/extract_perf_logs.py
imports: import os
  import re
  import sys
  import glob
  import json
  import argparse
  import pprint
  import numpy
label_desc: Use image node_id 1 for calling the AutoVivification obj's underlying member method code with example usage: obj.__getitem__(item) and returns: value, dict