code: def ignore_label(label, label_map=None):
      if label_map:
          for key in list(label_map.keys()):
              label[label == int(key)] = label_map[key]
      return label
  
imports: import sys
  import os
  import tools.preprocess_utils.global_var
label_desc: Use image node_id 4 for calling a global function with example usage: ignore_label(label, label_map) and returns: label