code: def modified_after(first_path, second_path):
      
      try:
          first_mtime = os.stat(first_path).st_mtime
      except EnvironmentError:
          return False
      try:
          second_mtime = os.stat(second_path).st_mtime
      except EnvironmentError:
          return True
      return first_mtime > second_mtime
docs: Returns True if first_path's mtime is higher than second_path's mtime.