lambda: create dynamodb table backups

lambda-create-dynamodb-backups.py

from datetime import date, datetime, timedelta
import json
import boto3
from botocore.exceptions import ClientError
import os

ddbRegion = os.environ['AWS_DEFAULT_REGION']
now = datetime.now().strftime("-%Y-%m-%d-%H-%M-%S")
backupRetention = 7


def lambda_handler(event, context):
    try:
        ddb = boto3.client('dynamodb', region_name=ddbRegion)
        tables = ddb.list_tables()['TableNames']

        for table in tables:
            backupName = table + now
            ddb.create_backup(TableName=table, BackupName=backupName)

            lowerDate = datetime.now() - timedelta(days=365)
            upperDate = datetime.now() - timedelta(days=backupRetention)

            responseLatest = ddb.list_backups(TableName=table,
             TimeRangeLowerBound=datetime(lowerDate.year, lowerDate.month, lowerDate.day),
             TimeRangeUpperBound=datetime(upperDate.year, upperDate.month, upperDate.day))

            latestBackupCount = len(responseLatest['BackupSummaries'])
            print(table, ': Backup', backupName, 'created. Number backups <',
                  upperDate, 'to delete:', latestBackupCount)

            if latestBackupCount != 0:
                for record in responseLatest['BackupSummaries']:
                    backupArn = record['BackupArn']
                    ddb.delete_backup(BackupArn=backupArn)
                    print('Deleted backup:', backupArn)
            else:
                None

    except ClientError as e:
        print(e)

    except ValueError as ve:
        print('error:', ve)

    except Exception as ex:
        print(ex)