code: def get_unique_id() -> Tuple[str, ...]:
      """Makes a unique identifier for this process; override with --acme_id."""
      # By default we'll use the global id.
      identifier = _DATETIME
  
      # If the --acme_id flag is given prefer that; ignore if flag processing has
      # been skipped (this happens in colab or in tests).
      try:
          identifier = ACME_ID.value or identifier
      except flags.UnparsedFlagAccessError:
          pass
  
      # Return as a tuple (for future proofing).
      return (identifier,)
  
file_path: acme/acme/utils/paths.py
imports: import os
  import os.path
  import shutil
  import time
  from typing import Optional, Tuple
  from absl import flags
label_desc: Use image node_id 2 for calling a global function with example usage: get_unique_id() and returns: identifier