code: def print_all() -> None:
      
      for code in sorted(term2hex_map):
          print(' '.join((
              '\033[48;5;{code}m{code:<3}:{hexval:<6}\033[0m',
              '\033[38;5;{code}m{code:<3}:{hexval:<6}\033[0m'
          )).format(code=code, hexval=term2hex_map[code]))
docs: Print all 256 xterm color codes.