python-3.x - Python: ネストされた辞書値のフェッチ GCP の推奨事項

Question

Python を使用して GCP Recommendations API からの API JSON 出力から特定のキー値を不正に使用しようとしていますが、Python を使用するのは初めてです。不正に使用しようとしている値のほとんどは問題なくフェッチできますが、JSON でより深くネストされたコード ブロック内で特定の値を不正に使用しようとすると、次のエラーで失敗します。TypeError: 'OperationGroup' object is not subscriptable

JSON 応答の完全な出力は次のとおりです (会社情報を保護するために一部の値が変更されています)。

name: "projects/12345678910/locations/us-central1-a/recommenders/google.compute.instance.MachineTypeRecommender/recommendations/abcd-efg-hijk-lmnop-qrstuv-123456"
description: "Save cost by changing machine type from e2-medium to e2-small."
last_refresh_time {
  seconds: 1623222401
}
primary_impact {
  category: COST
  cost_projection {
    cost {
      currency_code: "USD"
      units: -12
      nanos: -98539964
    }
    duration {
      seconds: 2592000
    }
  }
}
content {
  operation_groups {
    operations {
      action: "test"
      resource_type: "compute.googleapis.com/Instance"
      resource: "//compute.googleapis.com/projects/xyz/zones/us-central1-a/instances/abcname123"
      path: "/machineType"
      value_matcher {
        matches_pattern: ".*zones/us-central1-a/machineTypes/e2-medium"
      }
    }
    operations {
      action: "replace"
      resource_type: "compute.googleapis.com/Instance"
      resource: "//compute.googleapis.com/projects/xyz/zones/us-central1-a/instances/abcname123"
      path: "/machineType"
      value {
        string_value: "zones/us-central1-a/machineTypes/e2-small"
      }
    }
  }
}
state_info {
  state: ACTIVE
}
etag: "\"abc-123-def-456\""
recommender_subtype: "CHANGE_MACHINE_TYPE"

name: "projects/12345678910/locations/us-central1-a/recommenders/google.compute.instance.MachineTypeRecommender/recommendations/abcdefg-hijklmnop-123-456"
description: "Save cost by changing machine type from e2-medium to e2-small."
last_refresh_time {
  seconds: 1623222401
}
primary_impact {
  category: COST
  cost_projection {
    cost {
      currency_code: "USD"
      units: -12
      nanos: -99648292
    }
    duration {
      seconds: 2592000
    }
  }
}
content {
  operation_groups {
    operations {
      action: "test"
      resource_type: "compute.googleapis.com/Instance"
      resource: "//compute.googleapis.com/projects/xyz/zones/us-central1-a/instances/instance-example1"
      path: "/machineType"
      value_matcher {
        matches_pattern: ".*zones/us-central1-a/machineTypes/e2-medium"
      }
    }
    operations {
      action: "replace"
      resource_type: "compute.googleapis.com/Instance"
      resource: "//compute.googleapis.com/projects/xyz/zones/us-central1-a/instances/instance-example1"
      path: "/machineType"
      value {
        string_value: "zones/us-central1-a/machineTypes/e2-small"
      }
    }
  }
}
state_info {
  state: ACTIVE
}
etag: "\"abcdefg12345\""
recommender_subtype: "CHANGE_MACHINE_TYPE"

name: "projects/12345678910/locations/us-central1-a/recommenders/google.compute.instance.MachineTypeRecommender/recommendations/abcd1234"
description: "Save cost by changing machine type from e2-medium to e2-small."
last_refresh_time {
  seconds: 1623222401
}
primary_impact {
  category: COST
  cost_projection {
    cost {
      currency_code: "USD"
      units: -11
      nanos: -568971875
    }
    duration {
      seconds: 2592000
    }
  }
}
content {
  operation_groups {
    operations {
      action: "test"
      resource_type: "compute.googleapis.com/Instance"
      resource: "//compute.googleapis.com/projects/abcd/zones/us-central1-a/instances/instance-example2"
      path: "/machineType"
      value_matcher {
        matches_pattern: ".*zones/us-central1-a/machineTypes/e2-medium"
      }
    }
    operations {
      action: "replace"
      resource_type: "compute.googleapis.com/Instance"
      resource: "//compute.googleapis.com/projects/abcd/zones/us-central1-a/instances/instance-example2"
      path: "/machineType"
      value {
        string_value: "zones/us-central1-a/machineTypes/e2-small"
      }
    }
  }
}
state_info {
  state: ACTIVE
}
etag: "\"abcd1234\""
recommender_subtype: "CHANGE_MACHINE_TYPE"

Pythonでの私のコードは次のとおりです。

from google.cloud import recommender
import os

client = recommender.RecommenderClient()

def main():
    name = client.list_recommendations(parent='projects/xyzproject/locations/us-central1-a/recommenders/google.compute.instance.MachineTypeRecommender')
    for element in name:
        # print(element)
        print(element.description)
        print(element.primary_impact.category)
        print(element.primary_impact.cost_projection.cost.currency_code)
        print(element.primary_impact.cost_projection.cost.units)
        print(element.state_info.state)
        print(element.content.operation_groups)
        for item in element.content.operation_groups:
            print(item['resource_type'])
main()

上記の作業の次の部分:

print(element.description)
print(element.primary_impact.category)
print(element.primary_impact.cost_projection.cost.currency_code)
print(element.primary_impact.cost_projection.cost.units)
print(element.state_info.state)
print(element.content.operation_groups)

しかし、私がエラーと問題を抱えているのは次のとおりです。

for item in element.content.operation_groups:
    print(item['resource_type'])

Python スクリプトのその部分を使用しようとすると、次のエラーで失敗します。

TypeError: 'OperationGroup' object is not subscriptable

それで、誰かがJSON応答を適切に利用して、以下のブロック内の情報（「resource_type」など）を違法にする方法を理解するのを手伝ってもらえますか?

content {
  operation_groups {
    operations {
      action: "test"
      resource_type: "compute.googleapis.com/Instance"
      resource: "//compute.googleapis.com/projects/abcd/zones/us-central1-a/instances/instance-example2"
      path: "/machineType"
      value_matcher {
        matches_pattern: ".*zones/us-central1-a/machineTypes/e2-medium"
      }
    }
    operations {
      action: "replace"
      resource_type: "compute.googleapis.com/Instance"
      resource: "//compute.googleapis.com/projects/abcd/zones/us-central1-a/instances/instance-example2"
      path: "/machineType"
      value {
        string_value: "zones/us-central1-a/machineTypes/e2-small"
      }
    }
  }
}