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What is the correct way to use `pulumi.FileAsset`? Wanted to define an AWS policy in a `policy.json` and then reference that file the code below, but pulumi preview is throwing this error when trying that method `error: expected string or JSON map; got *resource.Asset`
```# Create a policy that allows the Lambda role to write to CloudWatch Logs
cloudwatch_policy = aws.iam.RolePolicy(
    resource_name='pulumi-lambda-test-policy',
    role=lambda_role.id,
    policy=pulumi.FileAsset('./policies/cloudwatch_policy.json')
)```

I guess I should have asked if that was even possible.  Every doc example I've seen has defined the policy json inline.

You would need to read the json file. There isn't a  Pulumi tool for reading from files and outputting a string: use another library for that.

You need your language's equivalent of `fs.readFileSync()`.

Ah perfect thanks. Managed to do it with open in python