如何使用Python在DynamoDB中查询列表字段中的项？

import boto3

# 创建DynamoDB客户端
dynamodb = boto3.client('dynamodb')

# 定义查询参数
table_name = 'your_table_name'
list_attribute = 'your_list_attribute'
item_to_find = 'item_to_find'

# 构建查询表达式
expression_attribute_values = {':item': {'S': item_to_find}}
key_condition_expression = f'contains({list_attribute}, :item)'

# 发起查询请求
response = dynamodb.scan(
    TableName=table_name,
    FilterExpression=key_condition_expression,
    ExpressionAttributeValues=expression_attribute_values
)

# 处理查询结果
items = response['Items']
for item in items:
    print(item)

# 如果结果超过1MB，继续查询剩余的结果
while 'LastEvaluatedKey' in response:
    response = dynamodb.scan(
        TableName=table_name,
        FilterExpression=key_condition_expression,
        ExpressionAttributeValues=expression_attribute_values,
        ExclusiveStartKey=response['LastEvaluatedKey']
    )
    items.extend(response['Items'])
    for item in response['Items']:
        print(item)