用JSON编写DynamoDB Map对象

我试图使用JSON文档向表中添加值,但总是遇到错误。我的JSON规范有什么问题?

• 主题是一个字符串(键)
• 问题是问题/答案的映射

我不断得到:

错误:

当我奔跑时 aws dynamodb batch-write-item --request-items file://notesTable.json :

Parameter validation failed:
Invalid type for parameter RequestItems.notesTable[0].PutRequest.Item.questions.
M, value: [OrderedDict([('what is Dynamo?', OrderedDict([('S', 'a non-relational
 document based NoSQL database')]))])], type: <class 'list'>, valid types: <clas
s 'dict'>

目标:

topics    questions
------    ---------
Dynamo    {"what is Dynamo?":{"S":"a non-relational document based NoSQL database"}}

JSON结构

{
    "notesTable": [
        {
            "PutRequest": {
                "Item": {
                    "topic":{"S":"Dynamo"},
                    "questions": {
                        "M": [
                            {"what is Dynamo?":{"S":"a non-relational document based NoSQL database"}}
                        ]
                    }
                }
            }
        }
    ]
}