如何遍历python boto3中的嵌套字典

如何解决如何遍历python boto3中的嵌套字典

你好，只想找到停止的实例，下面的 id 是下面嵌套的 JSON

- pipeline.id: first_pipeline
  config.string: 
    input { stdin { } }
    output { pipeline { send_to => [commonOut] } }
- pipeline.id: second_pipeline
  config.string: |
    input { pipeline { address => commonOut } }
    filter {
    }
    output { stdout { codec => rubydebug } }

我只想要那些被停止的实例，然后我想使用 boto3 使用他们的实例 ID 启动它们

我正在使用以下代码

{
 "Reservations": [
  {
   "Groups": [],"Instances": [
    {
     "AmiLaunchIndex": 0,"Architecture": "x86_64","BlockDeviceMappings": [
      {
       "DeviceName": "/dev/xvda","Ebs": {
        "AttachTime": "2021-03-11 09:43:59+00:00","DeleteOnTermination": true,"Status": "attached","VolumeId": "vol-0c49ff5c979904337"
       }
      }
     ],"CapacityReservationSpecification": {
      "CapacityReservationPreference": "open"
     },"ClientToken": "","CpuOptions": {
      "CoreCount": 1,"ThreadsPerCore": 1
     },"EbsOptimized": false,"EnaSupport": true,"EnclaveOptions": {
      "Enabled": false
     },"HibernationOptions": {
      "Configured": false
     },"Hypervisor": "xen","ImageId": "ami-038f1ca1bd58a5790","InstanceId": "i-041fb789f1554b7d5","InstanceType": "t2.micro","KeyName": "HadoopLearning","LaunchTime": "2021-03-11 09:43:58+00:00","MetadataOptions": {
      "HttpEndpoint": "enabled","HttpPutResponseHopLimit": 1,"HttpTokens": "optional","State": "applied"
     },"Monitoring": {
      "State": "disabled"
     },"NetworkInterfaces": [
      {
       "Attachment": {
        "AttachTime": "2021-03-11 09:43:58+00:00","AttachmentId": "eni-attach-022ac34489909cc78","DeviceIndex": 0,"NetworkCardIndex": 0,"Status": "attached"
       },"Description": "","Groups": [
        {
         "GroupId": "sg-5878120b","GroupName": "default"
        }
       ],"InterfaceType": "interface","Ipv6Addresses": [],"MacAddress": "0a:15:95:72:23:6b","NetworkInterfaceId": "eni-0d356de72ae7e6bfc","OwnerId": "216808211954","PrivateDnsName": "ip-172-31-29-51.ec2.internal","PrivateIpAddress": "172.31.29.51","PrivateIpAddresses": [
        {
         "Primary": true,"PrivateIpAddress": "172.31.29.51"
        }
       ],"SourceDestCheck": true,"Status": "in-use","SubnetId": "subnet-e705ccaa","VpcId": "vpc-4401543e"
      }
     ],"Placement": {
      "AvailabilityZone": "us-east-1d","GroupName": "","Tenancy": "default"
     },"ProductCodes": [],"PublicDnsName": "","RootDeviceName": "/dev/xvda","RootDeviceType": "ebs","SecurityGroups": [
      {
       "GroupId": "sg-5878120b","GroupName": "default"
      }
     ],"State": {
      "Code": 80,"Name": "stopped"  ####this one only which is stopped ###
     },"StateReason": {
      "Code": "Client.UserInitiatedShutdown","Message": "Client.UserInitiatedShutdown: User initiated shutdown"
     },"StateTransitionReason": "User initiated (2021-03-11 10:13:00 GMT)","Tags": [
      {
       "Key": "Name","Value": "aviral"
      }
     ],"VirtualizationType": "hvm","VpcId": "vpc-4401543e"
    },{
     "AmiLaunchIndex": 1,"VolumeId": "vol-069a9ca7f860fefd8"
       }
      }
     ],"InstanceId": "i-0d0c876682eef71ae","AttachmentId": "eni-attach-0b0eba3fb5b3c3205","MacAddress": "0a:3d:3e:bc:96:e3","NetworkInterfaceId": "eni-0688951c8bd226676","PrivateDnsName": "ip-172-31-19-102.ec2.internal","PrivateIpAddress": "172.31.19.102","PrivateIpAddress": "172.31.19.102"
        }
       ],"Name": "running" ###Not this one #####
     },"Value": "avinash"
      }
     ],"VpcId": "vpc-4401543e"
    }
   ],"ReservationId": "r-0d646190512fec9f8"
  }
 ],"ResponseMetadata": {
  "HTTPHeaders": {
   "cache-control": "no-cache,no-store","content-type": "text/xml;charset=UTF-8","date": "Thu,11 Mar 2021 10:14:39 GMT","server": "AmazonEC2","strict-transport-security": "max-age=31536000; includeSubDomains","transfer-encoding": "chunked","vary": "accept-encoding","x-amzn-requestid": "58065d1d-76fc-4f7a-9229-18584ee1031e"
  },"HTTPStatusCode": 200,"RequestId": "58065d1d-76fc-4f7a-9229-18584ee1031e","RetryAttempts": 0
 }
}

使用上面的代码，我得到了第一个块 JSON，但我只想要一个停止的实例，因为我的 AWS 中有 4000 个实例

解决方法

我认为以下应该有效：

instances_stopped = []

for reservation in ec2_result['Reservations']:
  for instance in reservation['Instances']:   
    
    instance_id = instance['InstanceId']
    
    if 'State' not in instance:
      print(f"Missing state for {instance_id}")
    else:
      state = instance['State']['Name']
      if state == 'stopped':        
        instances_stopped.append(instance_id)
        #print(instance_id,state)

print(instances_stopped)