code: def _vocall_category():
      """
      Get class id to category id map and category id
      to category name map of mixup voc dataset
  
      """
      label_map = pascalvoc_label()
      label_map = sorted(label_map.items(), key=lambda x: x[1])
      cats = [l[0] for l in label_map]
  
      clsid2catid = {i: i for i in range(len(cats))}
      catid2name = {i: name for i, name in enumerate(cats)}
  
      return clsid2catid, catid2name
  
file_path: PaddleDetection/ppdet/data/source/category.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  from ppdet.data.source.voc import pascalvoc_label
  from ppdet.data.source.widerface import widerface_label
  from ppdet.utils.logger import setup_logger
label_desc: Use image node_id 5 for calling a global function with example usage: _vocall_category() and returns: clsid2catid,  catid2name