code: def read_file(filename):
      """return the contents of the file named filename or None if file not found"""
      if os.path.isfile(filename):
          with open(filename, "r") as f:
              return f.read()
  
imports: import os
  import shutil
  import subprocess
  import sys
  import random
  import string
  import json
  from functools import partial
  from multiprocessing import Pipe, Pool, Process
  from pathlib import Path
  from tqdm import tqdm
  import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: read_file(filename) and returns: f