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You need to use `.apply()`
(<https://www.pulumi.com/docs/intro/concepts/programming-model/#apply>)
Here is a simple example that hopefully helps:
```# Create an AWS resource (S3 Bucket)
bucket = s3.Bucket('my-bucket')
bucket_name_array = bucket.id.apply(
    lambda id: id.split("-")
)
pulumi.export('bucket_name', bucket.id)
pulumi.export('name_array', bucket_name_array)```
