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

[aviruthen]

Description

The bug is a TypeError in get_code_hash() when SourceCode.requirements is None (the default). In v3.3.1 (the user's version), get_training_code_hash() did [source_dir] + dependencies where dependencies was None, causing TypeError: can only concatenate list (not 'NoneType') to list. The current master code in sagemaker-core/src/sagemaker/core/workflow/utilities.py has already been partially fixed — get_training_code_hash() now checks if dependencies: before concatenation. However, there is no test coverage for get_code_hash() being called with a TrainingStep whose SourceCode has requirements=None. Additionally, the get_code_hash() function itself could be more defensive by normalizing None requirements before passing them downstream. The fix on master looks correct but test coverage should be added to prevent regression.

Related Issue

Fixes #5518

Changes Made

• sagemaker-core/src/sagemaker/core/workflow/utilities.py
• 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)