fix #2777 #2895

src/llmtuner/train/pt/trainer.py

@@ -0,0 +1,30 @@
+from typing import TYPE_CHECKING
+
+from transformers import Trainer
+
+from ...extras.logging import get_logger
+from ..utils import create_custom_optimzer
+
+
+if TYPE_CHECKING:
+    from ...hparams import FinetuningArguments
+
+
+logger = get_logger(__name__)
+
+
+class CustomTrainer(Trainer):
+    r"""
+    Inherits Trainer for custom optimizer.
+    """
+
+    def __init__(self, finetuning_args: "FinetuningArguments", **kwargs) -> None:
+        super().__init__(**kwargs)
+        self.finetuning_args = finetuning_args
+
+    def create_optimizer_and_scheduler(self, num_training_steps: int) -> None:
+        self.optimizer = create_custom_optimzer(self.model, self.args, self.finetuning_args, num_training_steps)
+        if self.optimizer is None:
+            self.create_optimizer()
+
+        self.create_scheduler(num_training_steps=num_training_steps, optimizer=self.optimizer)