1.3.6 Use, Manage, and Maintain Data Stores

import boto3

table = boto3.resource('dynamodb').Table('Orders')

# Batch write
with table.batch_writer() as batch:
    for item in items:
        batch.put_item(Item=item)
    # Auto handles batching + unprocessed items retry

# Chỉ update nếu version match (Optimistic Locking)
table.update_item(
    Key={'id': 'order-123'},
    UpdateExpression='SET #s = :new_status, version = version + :inc',
    ConditionExpression='version = :current_version',
    ExpressionAttributeNames={'#s': 'status'},
    ExpressionAttributeValues={
        ':new_status': 'shipped',
        ':current_version': 5,
        ':inc': 1
    }
)