PostgreErroLog_Lambda.py

import boto3
import datetime

def lambda_handler(event, context):
    d = datetime.datetime.now()
    date = d.strftime("%Y-%m-%d")

    logs = 'error/postgresql.log.' + date

    rds_client = boto3.client('rds')
    rds_response = rds_client.download_db_log_file_portion(
        DBInstanceIdentifier='hostname',
        LogFileName=logs
    )

    print(rds_response)