This new version of format-bytes.py adds IPv6 representations:

Big-endian (b), little-endian (l) and 4 32-bit little-endian unsigned integers (l4).

And if you use a # to pass on literal data (here in hexadecimal: #h#), then the data is also printed.

format-bytes_V0_0_15.zip (http)
MD5: 42DBC44DA7F7ACB09AD353976CD7FA2F
SHA256: 2AF5BFB8A263BCA935CB3B73669B458D229B3E6FBCE3CA2F6E32CFDCE5B73723