code: def overall_jaccard_index_calc(jaccard_list):
      
      try:
          jaccard_sum = sum(jaccard_list)
          jaccard_mean = jaccard_sum / len(jaccard_list)
          return (jaccard_sum, jaccard_mean)
      except Exception:
          return "None"
docs: Calculate overall jaccard index.
  
      :param jaccard_list : list of jaccard index for each class
      :type jaccard_list : list
      :return: (jaccard_sum , jaccard_mean) as tuple