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replace Python-base tokenizer by non-fast tokenizer in error message #17836

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merged 1 commit into from
Jun 23, 2022
Merged

replace Python-base tokenizer by non-fast tokenizer in error message #17836

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20 changes: 16 additions & 4 deletions src/transformers/tokenization_utils_base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -291,7 +291,10 @@ def tokens(self, batch_index: int = 0) -> List[str]:
`List[str]`: The list of tokens at that index.
"""
if not self._encodings:
raise ValueError("tokens() is not available when using Python-based tokenizers")
raise ValueError(
"tokens() is not available when using non-fast tokenizers (e.g. instance of a `XxxTokenizerFast`"
" class)."
)
return self._encodings[batch_index].tokens

def sequence_ids(self, batch_index: int = 0) -> List[Optional[int]]:
Expand All @@ -312,7 +315,10 @@ def sequence_ids(self, batch_index: int = 0) -> List[Optional[int]]:
sequence.
"""
if not self._encodings:
raise ValueError("sequence_ids() is not available when using Python-based tokenizers")
raise ValueError(
"sequence_ids() is not available when using non-fast tokenizers (e.g. instance of a `XxxTokenizerFast`"
" class)."
)
return self._encodings[batch_index].sequence_ids

def words(self, batch_index: int = 0) -> List[Optional[int]]:
Expand All @@ -328,7 +334,10 @@ def words(self, batch_index: int = 0) -> List[Optional[int]]:
(several tokens will be mapped to the same word index if they are parts of that word).
"""
if not self._encodings:
raise ValueError("words() is not available when using Python-based tokenizers")
raise ValueError(
"words() is not available when using non-fast tokenizers (e.g. instance of a `XxxTokenizerFast`"
" class)."
)
warnings.warn(
"`BatchEncoding.words()` property is deprecated and should be replaced with the identical, "
"but more self-explanatory `BatchEncoding.word_ids()` property.",
Expand All @@ -349,7 +358,10 @@ def word_ids(self, batch_index: int = 0) -> List[Optional[int]]:
(several tokens will be mapped to the same word index if they are parts of that word).
"""
if not self._encodings:
raise ValueError("word_ids() is not available when using Python-based tokenizers")
raise ValueError(
"word_ids() is not available when using non-fast tokenizers (e.g. instance of a `XxxTokenizerFast`"
" class)."
)
return self._encodings[batch_index].word_ids

def token_to_sequence(self, batch_or_token_index: int, token_index: Optional[int] = None) -> int:
Expand Down