Struggling with `Output` Would appreciate some help I have a Pulumi Community #python

Struggling with `Output`. Would appreciate some he...

rich-whale-93740

08/08/2024, 1:12 AM

Struggling with

Output

. Would appreciate some help I have a list of

iam.Roles

. I want to iterate and create a dict with

role.name

as the key and

role.arn

as the value. Then export the dict. But because

role.name

Output

, I cannot use it as key and do something like this:

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role_arns_dict = [{role.name: role.value} for role in roles]
pulumi.export("role_arns", role_arns_dict)

Instead,

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roles_output = Output.all(role_names=[role.name for role in roles], role_arns=[role.arn for role in roles])
roles_output.apply(lambda roles_dict: _export_roles(roles_dict))

def _export_roles(roles_dict: dict) -> None:
    role_arns = {}
    for role_name, role_arn in zip(roles_dict["role_names"], roles_dict["role_arns"]):
        role_arns[role_name] = role_arn

    pulumi.export("role_arns", role_arns)

But the problem is seems because

.apply

is async,

pulumi preview

pulumi up

would finish without the

pulumi.export

has been executed yet. Any advice?

dry-keyboard-94795

08/08/2024, 7:35 AM

pulumi.export

takes Outputs as an input. Instead of calling export inside the apply, return the role_arns

dry-keyboard-94795

08/08/2024, 7:43 AM

You should also be able to use your roles directly like this, for some cleaner code:

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pulumi.Output.all(*roles).apply(
  lambda roles: {role.name: role.arn for role in roles}
)

rich-whale-93740

08/09/2024, 2:15 AM

Thanks Anthony! It looks like with this, within the

apply

role.name

is still

Output

, and it creates this error if I use it as a key of dict

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File "/Users/dennis.pan.117/code/iac/iam/venv/lib/python3.11/site-packages/pulumi/runtime/stack.py", line 242, in <dictcomp>
        key: massage(attr[key], seen) for key in attr if not key.startswith("_")
                                                             ^^^^^^^^^^^^^^^^^^^
    TypeError: 'Output' object is not callable

faint-pager-13674

08/21/2024, 2:30 PM

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role_dict_output = pulumi.Output.all(*[role.name.apply(lambda name: (name, role.arn)) for role in roles]).apply(
    lambda role_name_arn_pairs: {name: arn for name, arn in role_name_arn_pairs}
)

faint-pager-13674

08/21/2024, 2:30 PM

try something like this

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