[bugfix] fix reward_trainer logger

[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 bug by correctly initializing the logger within the reward_trainer module. This change ensures that the RewardTrainer can properly utilize the logging utilities provided by swift.utils, thereby resolving potential issues with logging messages or events during training.

Highlights

• Logger Initialization: The reward_trainer.py file now explicitly imports get_logger from swift.utils and initializes a logger instance at the module level. This ensures proper logging functionality within the RewardTrainer class.

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[gemini-code-assist]

Code Review

The pull request introduces a logger to the reward_trainer.py file. This change aims to enhance the debugging and monitoring capabilities of the reward training process.

[gemini-code-assist]

It's crucial to ensure that the logger instance is only initialized once. Initializing it multiple times could lead to unexpected behavior or performance issues. Consider using a singleton pattern or a similar mechanism to guarantee a single instance.

Additionally, it's important to verify that get_logger() is properly configured and handles different logging levels and outputs as expected.

Suggested change

	logger = get_logger()
	logger = get_logger(__name__)