code: def __init__(self, num_classes, save_summary=False):
      self.num_classes = num_classes
      self.save_summary = save_summary
      self.MCMOTEvaluator = MCMOTEvaluator
      self.result_root = None
      self.reset()
  
      self.seqs_overall = defaultdict(list)
  
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 1 to create a new MCMOTMetric object from inherited base classes: Metric with example: obj = MCMOTMetric(num_classes, save_summary)