[bugfix] Fix circular references

[Jintao-Huang]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @Jintao-Huang, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a circular import issue within the swift/llm/template/base.py file. By deferring a specific import statement to a function scope, it prevents a situation where two modules might attempt to import each other simultaneously, which can lead to runtime errors and module loading failures. This change ensures proper module initialization and improves the robustness of the system.

Highlights

• Circular Reference Fix: Resolved a circular import dependency by moving the LossScale import from the module's top level into the __init__ method of the Template class in swift/llm/template/base.py.

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[gemini-code-assist]

Code Review

This pull request aims to fix a circular reference by moving an import statement into a method. While this is the correct approach to break the cycle, it introduces a NameError because the imported class is used as a type hint for a class attribute, and it's no longer in scope at class definition time. I've suggested a fix to import the class for type-checking purposes, which resolves the error while keeping the circular import fix.

[gemini-code-assist]

Removing this top-level import and moving it into __init__ is the right way to fix the circular dependency. However, this will cause a NameError because LossScale is used as a type hint for self.loss_scale on line 116 and will no longer be in scope at class definition time.

To resolve this, you should add from swift.plugin.loss_scale.loss_scale import LossScale inside the if TYPE_CHECKING: block at lines 34-35. This will make the type available for static analysis without re-introducing the circular import at runtime.