http://sametmax.com/exercice-python-round-3/ - pas sûr mais just 4 fun :)

go.py

# -*- coding: utf-8 -*-
import os
import argparse
"""
to test it : python go.py <filename>
check it with python go.py -h ;)
"""


def do_action(args):
    """ handles the replacing stuff in a binary file """
    if os.path.isfile(args.file) is False:
        # dude miss something
        print("this file does not exist")
    else:
        # what we want to drop
        old_str = b'_NET_ACTIVE_WINDOW'
        # what we want to put instead
        new_str = b'                  '
        # load the file in memory
        buf = open(args.file, 'rb').read().replace(old_str, new_str)
        # write it
        # yes I know if nothing is found I do write for nothing
        open(args.file, 'wb').write(buf)


def main():
    """Sam et Max : Exercice Episode 3 """
    # main.__doc__ does the trick to get the docstring in the help ;)
    parser = argparse.ArgumentParser(prog="go",
                                     usage='%(prog)s [options]',
                                     description=main.__doc__,
                                     conflict_handler='resolve',
                                     add_help=True)
    parser.add_argument('file', help='the path of the file')
    args = parser.parse_args()

    do_action(args)

if __name__ == '__main__':
    main()