code: def mot_label():
      labels_map = {"person": 0}
      return labels_map
  
imports: import os
  import sys
  import cv2
  import glob
  import numpy
  from collections import OrderedDict, defaultdict
  from .dataset import DetDataset, _make_dataset, _is_valid_file
  from ppdet.core.workspace import register, serializable
  from ppdet.utils.logger import setup_logger
label_desc: Use image node_id 3 for calling a global function with example usage: mot_label() and returns: labels_map