code: def files_differ(path1, path2):
      if os.stat(path1).st_size != os.stat(path2).st_size:
          return True
      f1 = open(path1, "rb")
      f2 = open(path2, "rb")
      with f1, f2:
          while True:
              buf1 = f1.read(1024)
              buf2 = f2.read(1024)
              if buf1 != buf2:
                  return True
              if not buf1 or not buf2:
                  break
      return False
  
imports: import fnmatch
  import glob
  import logging
  import os
  import re
  import shutil
  from guild import util
label_desc: Use image node_id 21 for calling a global function with example usage: files_differ(path1, path2) and returns: False, True, True