类型错误：字符串索引必须是整数 describe_vpc_endpoints boto3。

Question

当我运行我的代码时，我得到的错误是

TypeError: string indices must be integers

这是我的代码

import boto3
import csv

ec2 = boto3.client('ec2')


vpcendpoints = ec2.describe_vpc_endpoints(DryRun=False)['VpcEndpoints']
results = list(map(lambda endpoint:(endpoint['VpcEndpointType'],endpoint['ServiceName'],endpoint['VpcEndpointId'],endpoint['VpcId'],endpoint['DnsEntries'['DnsName']]),vpcendpoints))

for (vpcendpointtype,servicename,vpcendpointid,vpcid,dnsname) in results:
    print (vpcendpointtype+','+ servicename+ ','+ vpcendpointid+ ','+ vpcid+ ','+ dnsname)

我认为问题出在['DnsEntries'['DnsName']]部分，但如何解决？

非常感谢帮助！！！！！！！！！！！！！！！！！！！！）。

打印出整个vpcendpoints(剪切的& 空白的)

{'VpcEndpointId': 'XXXXXXXXXXX', 'VpcEndpointType': 'Interface', 'VpcId': 'vpc-XXXXXXXXXXXXX', 'ServiceName': 'com.amazonaws.eu-central-1.logs', 
'State': 'available', 'PolicyDocument': '{\n  "Statement": [\n    {\n      "Action": "*", \n      "Effect": "Allow", \n      "Principal": "*", \n      "Resource": "*"\n    }\n  ]\n}', 'RouteTableIds': [], 
'SubnetIds': ['subnet-XXXXXXXXXX', 'subnet-XXXXXXXX', 'subnet-XXXXXXXXX'], 'Groups': [{'GroupId': 'sg-XXXXXXXXXX', 'GroupName': 'XXXXXXXXXX'}], 'PrivateDnsEnabled': True, 'RequesterManaged': False, 'NetworkInterfaceIds': ['eni-XXXXXXXXXX', 'eni-XXXXXXXXX', 'eni-XXXXXXXXXXXX'], 
'DnsEntries': [{'DnsName': 'vpce-XXXXXXXXXXXXX.logs.eu-central-1.vpce.amazonaws.com', 'HostedZoneId': 'XXXXXXXX'}, {'DnsName': 'vpce-XXXXXXXXXXX-XXXXXXX-eu-central-1a.logs.eu-central-1.vpce.amazonaws.com', 'HostedZoneId': 'XXXXXXXX'}, {'DnsName': 'vpce-XXXXXXXXX-XXXXXXX-eu-central-1b.logs.eu-central-1.vpce.amazonaws.com', 'HostedZoneId': 'XXXXXXXXX'}, {'DnsName': 'vpce-XXXXXXXXX-XXXXXX-eu-central-1c.logs.eu-central-1.vpce.amazonaws.com', 'HostedZoneId': 'XXXXXXXXXX'}, {'DnsName': 'logs.eu-central-1.amazonaws.com', 'HostedZoneId': 'XXXXXXXXX'}], 
'CreationTimestamp': datetime.datetime(2020, 2, 27, 13, 46, 4, tzinfo=tzutc()), 'Tags': [{'Key': 'Name', 'Value': 'XXXXXXXX'}], 
'OwnerId': 'XXXXXXX'},

Answer 1

你搞错了..:

endpoint['DnsEntries'['DnsName']]

DnsEntries 是一个 阵列:

 'DnsEntries': [
                {
                    'DnsName': 'string',
                    'HostedZoneId': 'string'
                },
            ]

因此，你必须叫它。比如 假设一个长度为1的数组。

endpoint['DnsEntries'][0]['DnsName']]

简化代码 其中工作。

for endpoint in vpcendpoints:

    print('VPC', endpoint['VpcEndpointType'],
          endpoint['ServiceName'],
          endpoint['VpcEndpointId'],
          endpoint['VpcId'])        

    for dns_entry in endpoint['DnsEntries']:
        print(" - DnsName: " + dns_entry['DnsName'])

输出示例：

VPC Gateway com.amazonaws.us-east-1.dynamodb vpce-032a826a vpc-aabb1122
VPC Interface com.amazonaws.us-east-1.elasticloadbalancing vpce-0f89a33420c1931d7 vpc-1a2b3c4d
 - DnsName: vpce-0f89a33420c1931d7-bluzidnv.elasticloadbalancing.us-east-1.vpce.amazonaws.com
 - DnsName: vpce-0f89a33420c1931d7-bluzidnv-us-east-1b.elasticloadbalancing.us-east-1.vpce.amazonaws.com
 - DnsName: vpce-0f89a33420c1931d7-bluzidnv-us-east-1a.elasticloadbalancing.us-east-1.vpce.amazonaws.com

Answer 2

Dns Entries是一个列表 因此，你需要对DNS条目进行迭代以获取DnsName，而不是将其视为一个字典。

'DnsEntries': [
                {
                    'DnsName': 'string',
                    'HostedZoneId': 'string'
                }
]