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[vLLM] Fix backward compatibility with hardcoded subprocessors classes in processors #44447

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Merged
yonigozlan merged 3 commits into from
Mar 5, 2026
Merged

[vLLM] Fix backward compatibility with hardcoded subprocessors classes in processors #44447

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82c3dc9
Fix compatibility with hardcoded subprocessor class in processors
yonigozlan Mar 4, 2026
81a6f4a
add deprecation warning
yonigozlan Mar 5, 2026
0d1f744
Merge branch 'main' into improve-bc-remote-code-processor-from-pretra…
yonigozlan Mar 5, 2026
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8 changes: 8 additions & 0 deletions src/transformers/processing_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1521,6 +1521,14 @@ def _get_arguments_from_pretrained(cls, pretrained_model_name_or_path, processor
elif is_primary:
# Primary non-tokenizer sub-processor: load via Auto class
auto_processor_class = MODALITY_TO_AUTOPROCESSOR_MAPPING[sub_processor_type]
# For backward compatibility, check if sub-processor class name is hardcoded as an attribute of the processor class.
if hasattr(cls, sub_processor_type + "_class"):
sub_processor_class_name = getattr(cls, sub_processor_type + "_class")
logger.warning_once(
f"`{cls.__name__}` defines `{sub_processor_type}_class = '{sub_processor_class_name}'`, "
f"which is deprecated. Register the correct mapping in `{auto_processor_class.__name__}` instead.",
)
auto_processor_class = cls.get_possibly_dynamic_module(sub_processor_class_name)
sub_processor = auto_processor_class.from_pretrained(
pretrained_model_name_or_path, subfolder=subfolder, **kwargs
)
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