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Fix a bug of the ['corpus_key'] of multi_corpus_dataset #5362

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Fix a bug of the ['corpus_key'] of multi_corpus_dataset #5362

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6 changes: 6 additions & 0 deletions fairseq/data/multi_corpus_dataset.py
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Original file line number Diff line number Diff line change
Expand Up @@ -215,6 +215,12 @@ def collater(self, samples):
except Exception:
print(f"Collating failed for key {key}", flush=True)
raise
# map key to dataset index
corpus_key_list = []
for sample in samples:
_, key = self._map_index(sample["full_id"])
corpus_key_list.append(list(self.datasets.keys()).index(key))
batch["net_input"]["corpus_key"] = torch.Tensor(dataset_idx_list).long()
return batch
else:
# Subclasses may override __getitem__ to not specify full_id
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