Refactor training loop

[Meiyim]

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Description

[paddle-bot[bot]]

Thanks for your contribution!

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 55.17241% with 13 lines in your changes are missing coverage. Please review.

Project coverage is 63.46%. Comparing base (b73bbbb) to head (c382dc0). Report is 926 commits behind head on develop.

:exclamation: Current head c382dc0 differs from pull request most recent head d52e163. Consider uploading reports for the commit d52e163 to get more accurate results

Files	Patch %	Lines
paddlenlp/trainer/trainer.py	55.17%	13 Missing :warning:

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #6098      +/-   ##
===========================================
- Coverage    63.53%   63.46%   -0.07%     
===========================================
  Files          514      514              
  Lines        73620    73690      +70     
===========================================
- Hits         46773    46767       -6     
- Misses       26847    26923      +76     

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[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
7 out of 8 committers have signed the CLA.

:white_check_mark: wuhuachaocoding
:white_check_mark: ForFishes
:white_check_mark: haohongxiang
:white_check_mark: GhostScreaming
:white_check_mark: Meiyim
:white_check_mark: xysheng-baidu
:white_check_mark: SylarTiaNII
:x: pangengzheng

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[github-actions[bot]]

This Pull Request is stale because it has been open for 60 days with no activity. 当前Pull Request 60天内无活动，被标记为stale。

[github-actions[bot]]

This Pull Request is stale because it has been open for 60 days with no activity. 当前Pull Request 60天内无活动，被标记为stale。