hexdump.py

import sys

# from original author @jbochi https://gist.github.com/jbochi

if len(sys.argv) != 2:
    print "Usage: %s <filename>" % sys.argv[0]
    sys.exit(1)

with open(sys.argv[1]) as f:
    chars = f.read()
    for i, char in enumerate(chars):
        if i % 0x10 == 0:
            if i != 0:
                sys.stdout.write("\n")
            sys.stdout.write("{0:0>7x} ".format(i))
        sys.stdout.write("{0:0>2x }".format(ord(char)))