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Fix import crash with transformers >= 5.13 #1460

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Fix import crash with transformers >= 5.13 #1460

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8 changes: 7 additions & 1 deletion mlx_lm/tokenizer_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -500,7 +500,13 @@ def batch_decode(self, *args, **kwargs):
return [self._postprocess_text(d) for d in decoded]


AutoTokenizer.register("NewlineTokenizer", fast_tokenizer_class=NewlineTokenizer)
try:
AutoTokenizer.register("NewlineTokenizer", fast_tokenizer_class=NewlineTokenizer)
except (AttributeError, TypeError):
# transformers >= 5.13 requires the auto-mapping key to be a config class;
# the name-based lookup we rely on is populated before that step, so the
# custom tokenizer stays resolvable and import can proceed.
pass


def _match(a, b):
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