如何从dynamoDB表中查询最新项目？

import boto3

# 连接到dynamoDB
dynamodb = boto3.resource('dynamodb')

# 获取表对象
table = dynamodb.Table('your_table_name')

# 构建查询请求
response = table.scan(
    FilterExpression='attribute_exists(project_date)',  # 筛选出包含项目日期字段的项目
    ProjectionExpression='project_name, project_date',  # 返回项目名称和日期字段
    Limit=10,  # 返回最多10个项目
    ScanIndexForward=False  # 按照日期字段降序排序
)

# 处理查询结果
for item in response['Items']:
    project_name = item['project_name']
    project_date = item['project_date']
    print(f"项目名称：{project_name}，创建日期：{project_date}")

# 如果结果集超过了Limit限制，可以使用LastEvaluatedKey继续查询下一页数据
while 'LastEvaluatedKey' in response:
    response = table.scan(
        FilterExpression='attribute_exists(project_date)',
        ProjectionExpression='project_name, project_date',
        Limit=10,
        ScanIndexForward=False,
        ExclusiveStartKey=response['LastEvaluatedKey']
    )
    for item in response['Items']:
        project_name = item['project_name']
        project_date = item['project_date']
        print(f"项目名称：{project_name}，创建日期：{project_date}")