get_args

This function extracts the script arguments within the arguments variable and
interprets their meaning before returning such content.

def get_args():
    """get_args

This function extracts the script arguments within the arguments variable and
interprets their meaning before returning such content.
    """
    expected = ['working_directory', 'operating_system', 'version']
    possible = ['json'].extend(expected)
    try:
        opts, args = getopt.getopt(sys.argv[1:], '', map(lambda x: ('%s=' % x),
                                   possible))
    except getopt.GetoptError as err:
        print(str(err))
        exit_cleanly(error_number=errno.EINVAL)
    arguments = dict()
    for o, a in opts:
        option = re.sub('^-*', '', o)
        if 'json' in option:
            arguments = _load_json(a)
            break
        if option in expected:
            arguments[option] = a
    error = 0
    for item in expected:
        if item not in arguments:
            print("Missing: %s from arguments" % item)
            error = errno.EINVAL
    if error:
        exit_cleanly(error_number=error)
    return arguments