从python中的boto3.client ec2中提取SnapshotId值

Question

我需要提取所有“ SnapshotId”（先前过滤）以将其删除。但是我的循环不适用于具有2个或更多附加卷的AMIS ...

我试图用一条指令（而不是几个循环）来做到这一点。

import boto3

ec2_client = boto3.client('ec2')
#filters:
images = ec2_client.describe_images(Owners=['self'])
AMIDescription ="AMI backup generated by Lambda"
#loops:
data = [i['BlockDeviceMappings'][0]['Ebs']['SnapshotId'] for i in images['Images'] if i['Description'] == AMIDescription ]
#print:
print (data)

结果： ['snap-0f0dd0b4949bbd867'，'snap-0bec32fc28f885d9a'，'snap-022f5e19566c99256']

带有所有信息的json示例：

{
  'Images': [
    {
      'Architecture': 'x86_64',
      'CreationDate': '2019-07-09T14:49:47.000Z',
      'ImageId': 'ami-08d431591b88d4335',
      'ImageLocation': '068359028657/TEST 2 Snapshots',
      'ImageType': 'machine',
      'Public': False,
      'OwnerId': '068359028657',
      'ProductCodes': [
        {
          'ProductCodeId': '3f8t6t8fp5m9fdsxx18yzwriozxi',
          'ProductCodeType': 'marketplace'
        }
      ],
      'State': 'available',
      'BlockDeviceMappings': [
        {
          'DeviceName': '/dev/xvda',
          'Ebs': {
            'Encrypted': False,
            'DeleteOnTermination': True,
            'SnapshotId': 'snap-0bec32fc28fdf885d9a',
            'VolumeSize': 100,
            'VolumeType': 'gp2'
          }
        },
        {
          'DeviceName': '/dev/sdf',
          'Ebs': {
            'Encrypted': False,
            'DeleteOnTermination': True,
            'SnapshotId': 'snap-0782adffd4e3c7e2d2a',
            'VolumeSize': 300,
            'VolumeType': 'gp2'
          }
        }
      ],
      'Description': 'AMI backup generated by Lambda',
      'Hypervisor': 'xen',
      'Name': 'TEST 2 Snapshots',
      'RootDeviceName': '/dev/xvda',
      'RootDeviceType': 'ebs',
      'SriovNetSupport': 'simple',
      'VirtualizationType': 'hvm'
    },
    {
      'Architecture': 'x86_64',
      'CreationDate': '2019-07-10T09:20:18.000Z',
      'ImageId': 'ami-0ae6a5d15f87fsdada4',
      'ImageLocation': '068359028657/TEST 2 Snapshots 2',
      'ImageType': 'machine',
      'Public': False,
      'OwnerId': '06835902fds8657',
      'ProductCodes': [
        {
          'ProductCodeId': '3f8t6ddt8fp5m9xx18yzwriozxi',
          'ProductCodeType': 'marketplace'
        }
      ],
      'State': 'available',
      'BlockDeviceMappings': [
        {
          'DeviceName': '/dev/xvda',
          'Ebs': {
            'Encrypted': False,
            'DeleteOnTermination': False,
            'SnapshotId': 'snap-0d74e92744efs49f504',
            'VolumeSize': 100,
            'VolumeType': 'gp2'
          }
        },
        {
          'DeviceName': '/dev/sdf',
          'Ebs': {
            'Encrypted': False,
            'DeleteOnTermination': False,
            'SnapshotId': 'snap-04fa670e447fs8b296e',
            'VolumeSize': 300,
            'VolumeType': 'gp2'
          }
        }
      ],
      'Description': 'TEST 2 Snapshots 2',
      'Hypervisor': 'xen',
      'Name': 'TEST 2 Snapshots 2',
      'RootDeviceName': '/dev/xvda',
      'RootDeviceType': 'ebs',
      'SriovNetSupport': 'simple',
      'VirtualizationType': 'hvm'
    }
  ],
  'ResponseMetadata': {
    'RequestId': 'b32d0a96-ssce50-4c97-9722-f7c0f72fsfce88',
    'HTTPStatusCode': 200,
    'HTTPHeaders': {
      'content-type': 'text/xml;charset=UTF-8',
      'content-length': '4277',
      'vary': 'accept-encoding',
      'date': 'Wed, 10 Jul 2019 10:18:15 GMT',
      'server': 'AmazonEC2'
    },
    'RetryAttempts': 0
  }
}

如何在Eb上包含一个循环以提取所有值，而不仅是第一个？