AWS Lambda Lookup AccountId and Region

For a number of uses including generating IAM roles and various policies, lambda code might require access to current account id and region. Here is a code snippet on how to acquire those values:

import json
import logging
import boto3

logger = logging.getLogger()
logger.setLevel(logging.INFO)

def lambda_handler(event, context):
    logger.info(json.dumps(event))
    account_id = boto3.client('sts').get_caller_identity().get('Account')
    # use a client which is region based
    logs_client = boto3.client('logs')
    region_name = logs_client.meta.region_name
    logger.info(f"{account_id}:{region_name}")