找不到python boto3 batch_write响应

import boto3

# 配置AWS凭证
session = boto3.Session(
    aws_access_key_id='YOUR_ACCESS_KEY',
    aws_secret_access_key='YOUR_SECRET_ACCESS_KEY',
    region_name='YOUR_REGION'
)

# 创建DynamoDB客户端
dynamodb = session.client('dynamodb')

response = dynamodb.batch_write_item(
    RequestItems={
        'TableName': [
            {
                'PutRequest': {
                    'Item': {
                        'Attribute1': {'S': 'Value1'},
                        'Attribute2': {'N': 'Value2'}
                    }
                }
            },
            # 添加更多的写入请求
        ]
    }
)

if 'UnprocessedItems' in response:
    unprocessed_items = response['UnprocessedItems']
    # 处理未处理的项目
else:
    # 所有项目都已成功处理