python - 如何获取 JSON 字典列表中的特定键

Question

我正在尝试通过 list_stacks() 获取最后一个删除的名为 BastionInfraStack 的堆栈(最近的堆栈)的 StackId 。 list_stacks() 命令返回以下内容:

{
    "StackSummaries": [
        {
            "StackId": "arn:aws:cloudformation:us-east-2:111111111:stack/Dev-BastionInfraStack/34deb540-9c2f-11ed-90a7-022b01b65a64",
            "StackName": "Dev-BastionInfraStack",
            "CreationTime": "2023-01-24T21:36:48.468000+00:00",
            "LastUpdatedTime": "2023-01-24T21:37:26.782000+00:00",
            "DeletionTime": "2023-01-24T22:19:03.403000+00:00",
            "StackStatus": "DELETE_COMPLETE",
            "DriftInformation": {
                "StackDriftStatus": "NOT_CHECKED"
            }
        },
        {
            "StackId": "arn:aws:cloudformation:us-east-2:111111111:stack/TestInfraStack/cf6d58d0-9b8c-11ed-a58b-02446413ef88",
            "StackName": "Dev-BastionInfraStack",
            "CreationTime": "2023-01-24T16:53:12.552000+00:00",
            "LastUpdatedTime": "2023-01-24T20:45:36.941000+00:00",
            "DeletionTime": "2023-01-24T21:15:49.673000+00:00",
            "StackStatus": "DELETE_COMPLETE",
            "DriftInformation": {
                "StackDriftStatus": "NOT_CHECKED"
            }
        },
        {
            "StackId": "arn:aws:cloudformation:us-east-2:111111111:stack/Dev-BastionInfraStack/54bcf7c0-9b51-11ed-bae1-02f106ea059a",
            "StackName": "Dev-BastionInfraStack",
            "CreationTime": "2023-01-23T19:08:33.666000+00:00",
            "LastUpdatedTime": "2023-01-23T19:09:06.759000+00:00",
            "DeletionTime": "2023-01-23T20:59:59.677000+00:00",
            "StackStatus": "DELETE_COMPLETE",
            "DriftInformation": {
                "StackDriftStatus": "NOT_CHECKED"
            }
        }
    ]
}

目前，我获取堆栈列表的方式如下:

      deleted_stacks = cfn.list_stacks(
        StackStatusFilter=['DELETE_COMPLETE']
      )

如何遍历该对象列表，检查我需要的堆栈是否具有名称 BastionInfraStack (可能使用正则表达式或通配符)并获取 StackId 并分配它到一个变量以便稍后在另一个函数中使用？

例如在这种情况下我想得到StackId arn:aws:cloudformation:us-east-2:111111111:stack/Dev-BastionInfraStack/34deb540-9c2f-11ed-90a7-022b01b65a64

Answer 1

您必须循环浏览列表并选择符合您条件的元素。

Python 的编写方式是

 mystacks=[d['StackId'] for d in deleted_stacks['StackSummaries'] if d['StackName']=="Dev-BastionInfraStack"]

如果您只想查找“BastionInfraStack”，请更改查找子字符串的条件