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Silence non-actionable TRL trainer import failures (#3980)

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_patch_trl_rl_trainers enumerates all trainer modules from dir(trl.trainer)
and attempts to import each one. Modules like alignprop_trainer fail because
they depend on optional packages (diffusers) that may not be installed. The
failure is harmless but the print() call produces noise on every import.

Change print() to logger.info() so these messages only appear when
UNSLOTH_ENABLE_LOGGING=1.

Co-authored-by: Daniel Han <danielhanchen@users.noreply.github.com>
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Daniel Han 2026-02-05 05:32:52 -08:00 • committed by GitHub
commit c6d6ff0333
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unsloth/models/rl.py Normal file → Executable file
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@ -420,7 +420,7 @@ def _patch_trl_rl_trainers(trainer_file = "grpo_trainer"):
try:
trainer = eval(f"trl.trainer.{trainer_file}")
except Exception as error:
print(f"Unsloth: Could not import trl.trainer.{trainer_file}: {error}")
logger.info(f"Unsloth: Could not import trl.trainer.{trainer_file}: {error}")
return
# Get SFTTrainer and SFTConfig names