code: def _parse_set(values):
      if values is not None:
          return set([item for item in values.split(",") if item])
      return None
  
imports: import argparse
  import os
  import sys
  import warnings
  from absl import app
  import tensorflow
  from tensorflow.lite.python import lite
  from tensorflow.lite.python.convert import register_custom_opdefs
  from tensorflow.lite.toco import toco_flags_pb2
  from tensorflow.lite.toco.logging import gen_html
  from tensorflow.python import tf2
  from tensorflow.python.framework import dtypes
  from tensorflow.python.platform import gfile
  from tensorflow.python.util import keras_deps
label_desc: Use image node_id 2 for calling a global function with example usage: _parse_set(values) and returns: None, set