hex2bin

#!/bin/env python

from binascii import unhexlify
from sys import argv
from string import hexdigits
from re import match

if len(argv) < 2:
    print("Usage: {} hex [hex...]".format(argv[0]))
    exit(1)

for i in range(1,len(argv)):
    print("_"*60)
    h = argv[i].strip();
    if match("^[{}]+$".format(hexdigits), h) == None:
        # TODO: Make it print to stderr
        print("The input {} is not a valid hex match".format(h))
        continue
    elif len(h) % 2 != 0:
        # TODO: Make it print to stderr
        print("The length of {} is not a multiple of two, and hence cannot be converted to ASCII".format(h))
        continue
    try:
        print("{}\n{}".format(h, unhexlify(h)))
    except Exception as e:
        print(e)

print("_"*60)