Load an auth plugin and session from options on the command line.

test-cli.py

import argparse
import sys

from keystoneclient import auth
from keystoneclient import session

parser = argparse.ArgumentParser('myapp')

auth.register_argparse_arguments(parser, sys.argv[1:])
session.Session.register_cli_options(parser)

args = parser.parse_args()

plugin = auth.load_from_argparse_arguments(args)
sess = session.Session.load_from_cli_options(args, auth=plugin)