are you suggesting i pass the arn as the id?

huh OK that’s wierd

so the

vpc = aws.ec2.get_vpc(default=True)

works when

vpc = aws.ec2.DefaultVpc(f'default-vpc')

does not

def seems like a bug then?

Re: DefaultVpc(), bear in mind this is an "advanced" resource. If you need to manipulate or use your vpc, either create a new (non-default) one, or get the default vpc as I showed above.

The doc says about DefaultVpc() https://www.pulumi.com/docs/reference/pkg/aws/ec2/defaultvpc/

This is an advanced resource, and has special caveats to be aware of when using it. Please read this document in its entirety before using this resource.

From reading your code above, I would say you should be able to achieve the same with the regular Vpc class.

Running this:

import pulumi_aws as aws

vpc = aws.ec2.get_vpc(default=True)
subnet_ids = aws.ec2.get_subnet_ids(vpc_id=vpc.id)
print(subnet_ids.ids)

should output something similar to this:

['subnet-204bcd78', 'subnet-f66a7d91', 'subnet-22b1b06b']