Cannot upload local file for submit_py_files in V3

[swademb]

PySDK Version

• PySDK V2 (2.x)
• PySDK V3 (3.x)

Describe the bug

The PySparkProcessor run no longer accepts local files due to the change to ProcessingInput interface - e.g. regression introduced in 3203e49

To reproduce

Insert a local file path into the list passed as submit_py_files in sagemaker.core.spark.processing.PySparkProcessor.run().

(Let me know if you need a more concrete example).

Expected behavior

Successfully starts the job.

Screenshots or logs

PyDantic reports the following errors:

ValidationError: 2 validation errors for ProcessingInput
source
  Extra inputs are not permitted [type=extra_forbidden, input_value='s3://sagemaker-.../input/py-files', input_type=str]
    For further information visit https://errors.pydantic.dev/2.13/v/extra_forbidden
destination
  Extra inputs are not permitted [type=extra_forbidden, input_value='/opt/ml/processing/input/py-files', input_type=str]
    For further information visit https://errors.pydantic.dev/2.13/v/extra_forbidden

The cause of the error is here:

            input_channel = ProcessingInput(
                source=input_channel_s3_uri,
                destination=f"{self._conf_container_base_path}{input_channel_name}",
                input_name=input_channel_name,
            )

System information

• AWS SageMaker Studio 4.4.3
• sagemaker-core: 2.20
• Python 3.12.14
• uname: Linux default 6.12.103-127.188.amzn2023.x86_64 SMP PREEMPT_DYNAMIC Tue Aug 25 15:42:53 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux

Additional context