英文 http://boto3.readthedocs.io/en/latest/guide/dynamodb.html
中文 https://docs.aws.amazon.com/zh_cn/amazondynamodb/latest/developerguide/GettingStarted.Python.03.html
英文 http://boto3.readthedocs.io/en/latest/guide/dynamodb.html
中文 https://docs.aws.amazon.com/zh_cn/amazondynamodb/latest/developerguide/GettingStarted.Python.03.html