python aws.Provider wrong key name role_arn

[kirillrdy]

Describe what happened

documentation and example states that

provider = aws.Provider(
assume_role= {
"role_arn": "somerole"
}
);

but this results in error

  error: pulumi:providers:aws resource 'rootAccountProvider' has a problem: unable to validate AWS credentials.
    Details: Cannot assume IAM Role. IAM Role ARN not set in assume role 1 of 1

it works however when key is roleArn

Sample program

provider = aws.Provider(
assume_role= {
"role_arn": "somerole"
}
);

Log output

No response

Affected Resource(s)

No response

Output of pulumi about

warning: using pulumi-language-python from $PATH at /nix/store/8zpv40zlppp57kq69d0szlgnf6p3icc2-pulumi-language-python-3.152.0/bin/pulumi-language-python
CLI
Version 3.152.0
Go Version go1.23.6
Go Compiler gc

Plugins
KIND NAME VERSION
resource aws 6.70.1
language python 3.152.0
resource random 4.18.0

Host
OS nixos
Version 25.05 (Warbler)
Arch x86_64

This project is written in python: executable='venv/bin/python' version='3.12.9'

Found no pending operations associated with production

Dependencies:
NAME VERSION
pulumi_aws 6.70.1
pulumi_random 4.18.0
setuptools 75.8.2
wheel 0.45.1

Additional context

No response

Contributing

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[VenelinMartinov]

Thanks for reporting @kirillrdy and glad you found a workaround.

I've raised an issue with the team maintaining the Python SDKs: pulumi/pulumi#18810