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fix: gemma4 mm_token_type_ids padding (#10359)

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Kingsley
2026-04-06 13:14:45 +08:00
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parent eae6f0b541
commit fa09c01c36
1 changed files with 13 additions and 0 deletions
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src/llamafactory/data/collator.py
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@@ -380,6 +380,19 @@ class MultiModalDataCollatorForSeq2Seq(DataCollatorForSeq2Seq):
for i, feature in enumerate(features):
feature["token_type_ids"] = token_type_ids[i]
if "mm_token_type_ids" in mm_inputs: # need tensor-like for gemma4
mm_token_type_ids = mm_inputs.pop("mm_token_type_ids")
max_len = max(len(ids) for ids in mm_token_type_ids)
padded = []
for ids in mm_token_type_ids:
pad_len = max_len - len(ids)
if self.tokenizer.padding_side == "right":
padded.append(ids + [0] * pad_len)
else:
padded.append([0] * pad_len + ids)
mm_inputs["mm_token_type_ids"] = torch.tensor(padded, dtype=torch.long)
features: dict[str, torch.Tensor] = super().__call__(features)
bsz, seq_len = features["input_ids"].shape[:2]