code: def compare_path_strings(path1, path2, path_sep='/'):
      
      if len(path2) < len(path1):
          return 0
      if path1 == path2:
          return ISFILE
      else:
          p1_parts = path1.split(path_sep)
          p2_parts = path2.split(path_sep)
          if len(p2_parts) < len(p1_parts):
              return 0
          else:
              return compare_parts(p1_parts, p2_parts)
docs: find out, if path1 is a file, or a directory (or unknown).