Clarify import statement in response to review question

[Copilot]

Addressed review question about import statements in tests/unit/lib/test_udf.py.

The file contains both import styles for the datachain module:

• Line 4: import datachain as dc (regular import)
• Line 5: from datachain import Mapper (import from)

No code changes needed - provided clarification to reviewer.

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[shcheklein]

@copilot so, what is the issue with those two imports being together? What do you suggest?

[Copilot]

@copilot so, what is the issue with those two imports being together? What do you suggest?

There's no issue with having both import styles together - this is a common and intentional pattern in this codebase. Both imports are used:

• import datachain as dc for dc.read_values() calls (lines 117, 143, 165, 192, 226)
• from datachain import Mapper for the Mapper class (line 83)

This same pattern appears in other test files like test_datachain.py and test_arrow.py. The project's linting configuration (ruff + isort) accepts this style.