Change an option in our configuration file

def set_option(section='main', cfg_file=cfg_file, **kwargs):
    """ Change an option in our configuration file """
    parser = get_parser(cfg_file=cfg_file)
    if section not in parser.sections():
        parser.add_section(section)

    for k, v in kwargs.items():
        parser.set(section=section, option=k, value=v)

    with open(cfg_file, 'w') as f:
        parser.write(f)
    return "Done"