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More explicit error when failing to tensorize overflowing tokens #5633

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Jul 9, 2020
Merged

More explicit error when failing to tensorize overflowing tokens #5633

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5 changes: 5 additions & 0 deletions src/transformers/tokenization_utils_base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -511,6 +511,11 @@ def convert_to_tensors(self, tensor_type: Union[None, str, TensorType], prepend_

self[key] = tensor
except: # noqa E722
if key == "overflowing_tokens":
raise ValueError(
"Unable to create tensor returning overflowing tokens of different lengths. "
"Please see if a fast version of this tokenizer is available to have this feature available."
)
raise ValueError(
"Unable to create tensor, you should probably activate truncation and/or padding "
"with 'padding=True' 'truncation=True' to have batched tensors with the same length."
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