code: def fetch_result(
      output_file, n_trials: int = 5, waiting_time: float = 1.0
  ) -> Any:
      """Load the output file.
  
      Args:
          output_file: str, a path to the output file.
          n_trials: int, optional number of trials to load the file, afterwards a
              None is returned.
          waiting_time: float, time in seconds to wait before retrying to load
              the file.
  
      Returns:
          The unpickled output file if found, else None.
      """
      if output_file is None:
          return None
      for _ in range(n_trials):
          if os.path.isfile(output_file):
              break
          time.sleep(waiting_time)
      else:
          return None
      with open(output_file, "rb") as fp:
          return pickle.load(fp)
  
imports: import enum
  import importlib
  import os
  import pickle
  import re
  import subprocess
  import sys
  import tempfile
  import time
  from dataclasses import dataclass, field
  from functools import partial
  from typing import Any, Callable, Dict, List, Tuple, Union
label_desc: Use image node_id 7 for calling a global function with example usage: fetch_result(output_file, n_trials, waiting_time) and returns: None, None, pickle