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# general
s
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b
If you're coming from a CDK background this is the most annoying part of pulumi. CDK handles tokens for you automatically but here, you have to get those values via an async style.
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subnet_infos = private_subnets.ids.apply(lambda ids: [get_subnet_info(id) for id in ids])
Did you try that syntax?
a
@broad-doctor-18421 I done something similer for it. I am fustrated from this. There is no to much example also to be inspire from online
Well I got 
AttributeError: 'list' object has no attribute 'apply'
Thanks for help @broad-doctor-18421
b
It is a frustrating model. It's something I believe should be taken care of natively by pulumi. Conversely in CDK, you will try to print an output and sometimes get: 
subnet is Output<TOKEN:asdf23lkj>
But the code internally will just handle it, and you don't have to know if you're dealing with a string or an output.
I think your answer is somewhere along those lines. But I fumble with pulumi still. Hopefully someone else might have better advice.
a
Thanks for you time and trying to help out!
m
It looks like you're appending the result of the lookup rather than the 
id
property of the subnet that was looked up, which I think is what you want.
If you change this:
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subnet_info = aws.ec2.get_subnet(id=subnet_id)
to this:
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subnet_info = aws.ec2.get_subnet(id=subnet_id).id
you get:
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Diagnostics:
  pulumi:pulumi:Stack (aws-python-bec8f14-dev):
    ['subnet-03e8c4a257e371bcc', 'subnet-013f2322ca6908836', 'subnet-08fbebe8d8aaa51af']
Hope that helps! You had everything right, just missed that one little thing, looks like. 🙂
Full program for reference:
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import pulumi_aws as aws

vpc = aws.ec2.Vpc.get("existing-vpc", id="vpc-abc123")

def get_subnets_info(private_subnets):
    subnets_info = []

    for subnet_id in private_subnets:
        subnet_info = aws.ec2.get_subnet(id=subnet_id).id
        subnets_info.append(subnet_info)

    return subnets_info

private_subnets = aws.ec2.get_subnets(filters=[{"name": "vpc-id", "values": [vpc.id]}],tags={"SubnetType":"Private"})
subnets_info = get_subnets_info(private_subnets.ids)
print(subnets_info)
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