def init_count(num_classes):
        """
        Initiate _count for all object classes
        :param num_classes:
        """
        for cls_id in range(num_classes):
            BaseTrack._count_dict[cls_id] = 0

        Initiate _count for all object classes
        :param num_classes:
        
ppdet/modeling/mot/tracker/base_jde_tracker.py