A simple containerized redis controlled by Python

cache.py

import argparse
import docker

def run_redis(client):
    try:
        container = client.containers.get('redis_cache')
    except docker.errors.NotFound:
        container = client.containers.run('redis', ports={'6379/tcp' : 6379}, detach = True, name='redis_cache')
    else:
        if container.status == 'exited':
            container.start()
    return container

def stop_redis(client):
    container = client.containers.get('redis_cache')
    container.stop()
    return container

def delete_redis(client):
    container = stop_redis(client)
    container.remove()
    return container

if __name__ == "__main__":

    parser = argparse.ArgumentParser()
    group = parser.add_mutually_exclusive_group(required=True)
    group.add_argument('-r', '--run', help='Run cache', action='store_true')
    group.add_argument('-s', '--stop', help='Stop cache', action='store_true')
    group.add_argument('-d', '--delete', help='Delete cache', action='store_true')

    client = docker.from_env()

    args = vars(parser.parse_args())

    if args['run']:
        run_redis(client)
    elif args['stop']:
        stop_redis(client)
    elif args['delete']:
        delete_redis(client)