fix: Pipeline TypeError: can only concatenate list (not "NoneType") to list Using Sou (#5518)

[aviruthen]

Description

The bug is a TypeError when SourceCode.requirements is None (its default). In get_code_hash(), source_code.requirements (which is None) is passed as the dependencies parameter to get_training_code_hash(). In SDK v3.3.1, get_training_code_hash() did [source_dir] + dependencies directly, causing TypeError: can only concatenate list (not 'NoneType') to list. The current master code already has a fix: it checks if dependencies: before concatenating. However, there are no unit tests for get_code_hash() specifically with a TrainingStep using SourceCode(requirements=None), which is the exact user scenario. We should add such tests to prevent regression, and also verify the existing fix is correct.

Related Issue

Fixes #5518

Changes Made

• sagemaker-core/tests/unit/workflow/test_utilities.py

AI-Generated PR

This PR was automatically generated by the PySDK Issue Agent.

• Confidence score: 85%
• Classification: bug
• SDK version target: V3

Merge Checklist

• Changes are backward compatible
• Commit message follows prefix: description format
• Unit tests added/updated
• Integration tests added (if applicable)
• Documentation updated (if applicable)