code: def expand_path(file_path):
      return os.path.expanduser(os.path.expandvars(file_path))
  
file_path: ddsp/ddsp/training/train_util.py
imports: import json
  import os
  import time
  from absl import logging
  from ddsp.training import cloud
  import gin
  import tensorflow.compat.v2
label_desc: Use image node_id 2 for calling a global function with example usage: expand_path(file_path) and returns: os