convert from hex text to binary

hex2bin.py

#!/usr/bin/env python3
import sys
import struct

if len(sys.argv) != 3:
    print("Usage: {} <source> <target>".format(sys.argv[0]))
    quit()

with open(sys.argv[1]) as f:
    hex = f.read()

with open(sys.argv[2], 'wb') as f:
    for h in hex.split():
        f.write(struct.pack('B', int(h, 16)))
    print(f.tell())