Python3 bytes to ASCII hexdump function using format

hexdump.py

def hexdump(src, length=16, sep='.'):
    """Hex dump bytes to ASCII string, padded neatly


    In [107]: x = b'\x01\x02\x03\x04AAAAAAAAAAAAAAAAAAAAAAAAAABBBBBBBBBBBBBBBBBBBBBBBBBB'
    
    In [108]: print('\n'.join(hexdump(x)))
    00000000  01 02 03 04 41 41 41 41  41 41 41 41 41 41 41 41 |....AAAAAAAAAAAA|
    00000010  41 41 41 41 41 41 41 41  41 41 41 41 41 41 42 42 |AAAAAAAAAAAAAABB|
    00000020  42 42 42 42 42 42 42 42  42 42 42 42 42 42 42 42 |BBBBBBBBBBBBBBBB|
    00000030  42 42 42 42 42 42 42 42                          |BBBBBBBB        |
    """
    FILTER = ''.join([(len(repr(chr(x))) == 3) and chr(x) or sep for x in range(256)])
    lines = []
    for c in range(0, len(src), length):
        chars = src[c: c + length]
        hex_ = ' '.join(['{:02x}'.format(x) for x in chars])
        if len(hex_) > 24:
            hex_ = '{} {}'.format(hex_[:24], hex_[24:])
        printable = ''.join(['{}'.format((x <= 127 and FILTER[x]) or sep) for x in chars])
        lines.append('{0:08x}  {1:{2}s} |{3:{4}s}|'.format(c, hex_, length * 3, printable, length))
    return lines

Thanks-, yes it was gross- and thanks for adding the PEP-484 :)