This is a lambda handler that I am saving for the next time that I choose to execute lambda from a CloudFormation script.

lambda_handler_cloudformation.py

def lambda_handler(event, context):
    try:
        logger.info(json.dumps(event,indent=4))
        main(event, context)

        responseStatus  = 'SUCCESS'
        responseData    = {}
    except Exception as msg:
        logger.error(msg)

        responseStatus  = 'FAILED'
        responseData    = {'error':msg}

    logger.info(
        'Sending CloudFormation Response. ' +
        ' Status: ' + responseStatus + ', ' +
        ' Status JSON: ' + str(responseData)
    )

    cfnresponse.send(
        event,
        context,
        responseStatus,
        responseData
    )