我需要从 AWS 中提取所有 RUNNING PUBLIC Ip,并且我正在使用以下代码:
def gather_public_ip():
regions = ['us-west-2', 'eu-central-1', 'ap-southeast-1']
combined_list = [] ##This needs to be returned
for region in regions:
instance_information = [] # I assume this is a list, not dict
ip_dict = {}
client = boto3.client('ec2', aws_access_key_id=ACCESS_KEY, aws_secret_access_key=SECRET_KEY,
region_name=region, )
instance_dict = client.describe_instances().get('Reservations')
for reservation in instance_dict:
for instance in reservation['Instances']: # This is rather not obvious
if instance[unicode('State')][unicode('Name')] == 'running' and instance[unicode('PublicIpAddress')] != None:
ipaddress = instance[unicode('PublicIpAddress')]
tagValue = instance[unicode('Tags')][0][unicode('Value')] # 'Tags' is a list, took the first element, you might wanna switch this
zone = instance[unicode('Placement')][unicode('AvailabilityZone')]
info = ipaddress, tagValue, zone
instance_information.append(info)
combined_list.append(instance_information)
return combined_list
这对我不起作用,它给了我错误:
ipaddress = instance[unicode('PublicIpAddress')]
KeyError: u'PublicIpAddress'
原因是
PublicIpAddress
在这个字典中不存在..有人可以帮我吗?
最佳答案
使用get()
而不是 dict[key]
. get()
不会引发 KeyError
.这里有一些例子可以解释。
>>> test = {'xxx':123}
>>> test['xxx']
123
>>> test['yyy']
KeyError: 'yyy'
>>> test.get('yyy')
>>> test.get('yyy') is None
True
您可以检查
'PublicIpAddress'
缺席如下。ipaddress = instance.get(u'PublicIpAddress')
if ipaddress is None:
# Do Something
编辑
if instance[u'State'][u'Name'] == 'running' and instance.get(u'PublicIpAddress') is not None:
print instance.get(u'PublicIpAddress')
关于python - 如何使用boto3获取公共(public)IP,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38049391/