printhex.py

#!/usr/bin/env python
########################################################################.......

"""Print the given files' content and hexadecimal byte values.
"""

from __future__ import print_function

import argparse
import sys

INVISIBLE = range(0x20) + [0x81, 0x8d, 0x8f, 0x90, 0x9d]

def main(args):
    p = argparse.ArgumentParser(description=__doc__)
    p.add_argument("file", action="store", nargs="+",
                   help="one or more files to be printed")
    ns = p.parse_args(args)
    
    status = 0
    
    for filename in ns.file:
        try:
            with open(filename, "rb") as f:
                i = 0
                chunk = f.read(16)
                while chunk:
                    # Decoding as Latin-1 to get a visual representation for most
                    # bytes that would otherwise be non-printable.
                    strchunk = "".join("_" if ord(c) in INVISIBLE else c.decode("windows-1252")
                                       for c in chunk)
                    hexchunk = " ".join("{:0>2X}".format(ord(c)) for c in chunk)
                    print("0x{:>08X} | {:<48} | {:<16}".format(i, hexchunk, strchunk))
                    i += 16
                    chunk = f.read(16)
                
        except Exception as err:
            print("printhex: {}: {!s}".format(type(err).__name__, err), file=sys.stderr)
            status = 1
    
    sys.exit(status)

if __name__ == "__main__":
    main(sys.argv[1:])