parse arguments and make go

def main():
    cmd = sys.argv
    cmd.pop(0)
    """
    parse arguments and make go
    """
    parser = argparse.ArgumentParser()
    parser.add_argument(
        '-s',
        '--src',
        help='source folder to watch',
        default='.',
        dest='src',
        metavar='folder'
    )
    parser.add_argument(
        '-d',
        '--dest',
        help='source folder to watch',
        default=None,
        dest='dest',
        metavar='folder'
    )
    args = parser.parse_args()
    print 'Initializing...'
    config.source_dir = os.path.abspath(args.src)
    if args.dest != None:
        config.dest_dir = os.path.abspath(args.dest)
    init_sources(config.source_dir)
    if cmd:
        c = cmd[0]
        commands = globals()
        if c in commands:
            commands[c]()