hexdump.py

def tohex1(n):
    assert 0 <= n <= 15
    return '0123456789ABCDEF'[n]


def tohex2(n):
    assert 0 <= n <= 255
    return tohex1(n // 16) + tohex1(n % 16)


def tohex8(bytes):
    assert len(bytes) <= 8
    result = ''
    for n in bytes:
        result += ' ' + tohex2(n)
    result += '   ' * (8 - len(bytes))
    return result


def tohex16(bytes):
    assert len(bytes) <= 16
    return tohex8(bytes[:8]) + ' ' + tohex8(bytes[8:])


def hexaddress(number):
    digits = []
    for i in range(8):
        digits.append(tohex1(number // 16 ** i % 16))
    return ''.join(reversed(digits))


assert hexaddress(128) == '00000080'