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fix SFT trainer

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Former-commit-id: bf09b6a6cd75cc2738d9af6b8c30bcbba77fa9b5
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hiyouga 2023-10-31 21:52:52 +08:00
parent db06fcfc84
commit 2406200914
1 changed files with 1 additions and 1 deletions
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src/llmtuner/tuner/sft/trainer.py
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@ -33,10 +33,10 @@ class CustomSeq2SeqTrainer(Seq2SeqTrainer):
Subclass and override to inject custom behavior.
"""
labels = inputs["labels"].clone() if "labels" in inputs else None # backup labels
if self.args.predict_with_generate:
assert self.tokenizer.padding_side == "left", "This method only accepts left-padded tensor."
prompt_len, label_len = inputs["input_ids"].size(-1), inputs["labels"].size(-1)
labels = inputs["labels"].clone()
if prompt_len > label_len:
inputs["labels"] = self._pad_tensors_to_target_len(inputs["labels"], inputs["input_ids"])
if label_len > prompt_len: