Delete AMIs and associated snapshots created on a given date

cleanup_ami_by_date.py

#!/usr/bin/python
import boto3
client = boto3.client('ec2')
account_number = boto3.client('sts').get_caller_identity()['Account']
response = client.describe_images(Owners=[account_number])

for image in response['Images']:
    if "2017-08-21" in image['CreationDate']:
        image_id = image['ImageId']
        snapshot_id = image['BlockDeviceMappings'][0]['Ebs']['SnapshotId']
        print image['CreationDate']
        print image_id, " To be deleted"
        print snapshot_id, " To be deleted"
        response = client.deregister_image(ImageId=image_id)
        print response
        response = client.delete_snapshot(SnapshotId=snapshot_id)
        print response