[Refactor] SFTTrainer SFTConfig (PaddlePaddle#9318)

* refactor

* fix import.

llm/alignment/dpo/dpo_argument.py

@@ -18,16 +18,7 @@
 
 from paddlenlp.trainer import TrainingArguments
 from paddlenlp.trainer.trainer_utils import IntervalStrategy
-
-
-def add_start_docstrings(*docstr):
-    """Adds docstrings for a function."""
-
-    def docstring_decorator(fn):
-        fn.__doc__ = "".join(docstr) + (fn.__doc__ if fn.__doc__ is not None else "")
-        return fn
-
-    return docstring_decorator
+from paddlenlp.trainer.utils.doc import add_start_docstrings
 
 
 @dataclass

llm/alignment/rm/flashmask/reward_argument.py

@@ -17,16 +17,7 @@
 from typing import Optional
 
 from paddlenlp.trainer import TrainingArguments
-
-
-def add_start_docstrings(*docstr):
-    """Adds docstrings for a function."""
-
-    def docstring_decorator(fn):
-        fn.__doc__ = "".join(docstr) + (fn.__doc__ if fn.__doc__ is not None else "")
-        return fn
-
-    return docstring_decorator
+from paddlenlp.trainer.utils.doc import add_start_docstrings
 
 
 @dataclass

llm/auto_parallel/gpt-3/run_pretrain_auto.py

@@ -52,14 +52,7 @@
     check_data_split,
     print_rank_0,
 )
-
-
-def add_start_docstrings(*docstr):
-    def docstring_decorator(fn):
-        fn.__doc__ = "".join(docstr) + (fn.__doc__ if fn.__doc__ is not None else "")
-        return fn
-
-    return docstring_decorator
+from paddlenlp.trainer.utils.doc import add_start_docstrings
 
 
 @dataclass

llm/auto_parallel/llama/run_pretrain_auto.py

@@ -55,14 +55,7 @@
     check_data_split,
     print_rank_0,
 )
-
-
-def add_start_docstrings(*docstr):
-    def docstring_decorator(fn):
-        fn.__doc__ = "".join(docstr) + (fn.__doc__ if fn.__doc__ is not None else "")
-        return fn
-
-    return docstring_decorator
+from paddlenlp.trainer.utils.doc import add_start_docstrings
 
 
 @dataclass

llm/auto_parallel/qwen/run_pretrain_3D_auto.py

@@ -53,14 +53,7 @@
     check_data_split,
     print_rank_0,
 )
-
-
-def add_start_docstrings(*docstr):
-    def docstring_decorator(fn):
-        fn.__doc__ = "".join(docstr) + (fn.__doc__ if fn.__doc__ is not None else "")
-        return fn
-
-    return docstring_decorator
+from paddlenlp.trainer.utils.doc import add_start_docstrings
 
 
 @dataclass

llm/experimental/ernie-3.5-se/run_pretrain.py

@@ -49,12 +49,7 @@
 }
 
 
-def add_start_docstrings(*docstr):
-    def docstring_decorator(fn):
-        fn.__doc__ = "".join(docstr) + (fn.__doc__ if fn.__doc__ is not None else "")
-        return fn
-
-    return docstring_decorator
+from paddlenlp.trainer.utils.doc import add_start_docstrings
 
 
 @dataclass