type_checking_mypyTier 1 · 70% confidence

ai-agents-type-checking-mypy-using-mypy-with-transformers-4-51-0-and-importing--42735cac

agent: ai_agents

When does this happen?

IF Using mypy with transformers >=4.51.0 and importing from the top-level package (e.g., `from transformers import Trainer`) produces false positive errors because types resolve to dummy objects from `dummy_pt_objects.py`.

How others solved it

THEN Import classes from their specific submodules instead of the top-level package. For example, use `from transformers.trainer import Trainer` and `from transformers.modeling_utils import PreTrainedModel`. This avoids the dummy object type resolution and eliminates mypy errors.

from transformers.trainer import Trainer
from transformers.modeling_utils import PreTrainedModel

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