dockerCommand=$("aws ecr get-login --profile profileName --region us-west-2")
$dockerCommand  (which looks like docker login -u AWS -p ..longPassword.. -e none https://ACCTID.dkr.ecr.us-west-2.amazonaws.com
docker pull ACCTID.dkr.ecr.us-west-2.amazonaws.com/REPO/NAME:TAGNAME

import boto3
import docker
dockerClient = docker.from_env()

session = boto3.setup_default_session(profile_name='vzw')
client = session.client('ecr', region_name='us-west-2')

token = client.get_authorization_token(registryIds=[registryId])

username = 'AWS'
password = token['authorizationData'][0]['authorizationToken']
registry = token['authorizationData'][0]['proxyEndpoint']
regClient = dockerClient.login(username, password, registry)

def login(self, username, password=None, email=None, registry=None,
          reauth=False, insecure_registry=False, dockercfg_path=None):

regClient = dockerClient.login(username, password, registry)

regClient = dockerClient.login(username, password, registry=registry)

password = (base64.b64decode(response['authorizationData'[0]authorizationToken'])).decode("utf-8").split(":")[-1]