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<@U02R2S0PVDX> I think we've accurately explained this a couple of times now.

If you want to wait for a resource to be finished creating and then do something, you _have_ to use an `apply` in order to do so.

I would recommend reading this blog article I wrote: <https://www.leebriggs.co.uk/blog/2021/05/09/pulumi-apply.html>

You're going to have a lot easier time here if you create your own ipv6 block instead of replying on the output from the VPC, but if you really want to use the output from the VPC, you're going to need an `apply`.

Hi <@UCWG26BH7> i have actually tried it and it didnt work

hence trying to find any other way of doing it

ideally would like keep the ipv6 dynamic as is for now

also the second ask i am seeking help is around is the storing of export data to refer it in next stage of deployment…any pointers to that

you should be able to just store them in arrays: <https://github.com/jen20/pulumi-aws-vpc/blob/master/python/jen20_pulumi_aws_vpc/vpc.py#L151-L153>

tried this
```ipv6_network = resource_vpc.ipv6_cidr_block
ipv6_subnets_generator = ipv6_network.apply(_get_ipv6_subnets_of)```

in this case get a new error due to type

```      File "./__main__.py", line 73, in &lt;module&gt;
        ipv6_cidr = str(next(ipv6_subnets_generator))
    TypeError: 'Output' object is not an iterator```

based on that tried to change  this function to  _`_get__ipv6_subnets_of`

```def _get_ipv6_subnets_of(cidr, prefix):
    ipv6_network = IPNetwork(cidr.apply(lambda cidr: f"{cidr}"))
    cidrs = ipv6_network.subnet(prefix.apply(lambda prefix: int(prefix)))
    return cidrs```

the moment i use the apply property it starts another series of issues with type

I don't have enough context here to really fix the problem, but you need to do any manipulation to the networks inside the apply _and_ also do the subnet creation inside the apply

you're not doing that - you're just returning a subnet block and hoping you can manipulate it. you can't, you have to wait for the result to resolve

Thanks Jax for the clarification…understood
Have tried with few variations but couldn’t make it work…will look at more options