How to get a specific key in a list of dicts in JSON-CodePudding

I am trying to get the StackId through list_stacks() of the last deleted stack with the name BastionInfraStack (the most recent one). The list_stacks() command returns the following:

{
    "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"
            }
        }
    ]
}

For now, the way I am getting the list of stacks is like this:

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

How can I go through that list of objects, check that the stack I need has name BastionInfraStack (maybe with regex or wildcards) and take the StackId and assign it to a variable for later use in another function?

For example in this scenario I would like to get the StackId arn:aws:cloudformation:us-east-2:111111111:stack/Dev-BastionInfraStack/34deb540-9c2f-11ed-90a7-022b01b65a64

CodePudding user response：

You have to loop through the list and pick the elements matching your criteria Python way of writing this is

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

Change to condition to look for a substring if you only want to look for "BastionInfraStack"