code: def idf1_overall(summary_df, overall_dic):
      del summary_df
      idf1 = quiet_divide(
          2.0 * overall_dic["idtp"],
          (overall_dic["num_objects"] + overall_dic["num_predictions"]),
      )
      return idf1
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import copy
  import sys
  import math
  from collections import defaultdict
  import numpy
  import pandas
  from .metrics import Metric
  from ppdet.utils.logger import setup_logger
label_desc: Use image node_id 7 for calling the MCMOTMetricOverall obj's underlying member method code with example usage: obj.idf1_overall(summary_df, overall_dic) and returns: idf1