AWS - Python - Retrieve a value from the Parameter Store

AWS-GetParameterStore.py

#####################################################################
# Runs on AWS Lambda 
# Please make sure the role as the getParameters access.
# -> AmazonSSMFullAccess for simplicity
#
# Boto3 library is already included.
# Documentation: http://boto3.readthedocs.io/en/latest/reference/services/ssm.html#SSM.Client.describe_parameters
#####################################################################
import boto3

client = boto3.client('ssm')

def lambda_handler(event, context):
    response = client.get_parameter(Name='YOUR_TAG_NAME')
    
    return response['Parameter']['Value']

If the parameter is encrypted, the response = line should read:

response = client.get_parameter(Name='YOUR_TAG_NAME', WithDecryption=True)