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# Copyright 2020-2026 The HuggingFace Team. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# /// script
# dependencies = [
# "trl",
# "peft",
# "trackio",
# "kernels",
# ]
# ///
# docstyle-ignore
"""
# Full training (off-policy only, lmbda=0):
```
python examples/scripts/distillation.py \
--model_name_or_path Qwen/Qwen2.5-0.5B-Instruct \
--teacher_model_name_or_path Qwen/Qwen2.5-1.5B-Instruct \
--dataset_name trl-lib/chatbot_arena_completions \
--learning_rate 2e-5 \
--per_device_train_batch_size 4 \
--gradient_accumulation_steps 8 \
--lmbda 0.0 \
--output_dir distilled-model \
--num_train_epochs 1
```
# Mixed on/off-policy (lmbda=0.5):
```
python examples/scripts/distillation.py \
--model_name_or_path Qwen/Qwen2.5-0.5B-Instruct \
--teacher_model_name_or_path Qwen/Qwen2.5-1.5B-Instruct \
--dataset_name trl-lib/chatbot_arena_completions \
--learning_rate 2e-5 \
--per_device_train_batch_size 4 \
--gradient_accumulation_steps 8 \
--lmbda 0.5 \
--beta 0.5 \
--output_dir distilled-model \
--num_train_epochs 1
```
# LoRA:
```
python examples/scripts/distillation.py \
--model_name_or_path Qwen/Qwen2.5-0.5B-Instruct \
--teacher_model_name_or_path Qwen/Qwen2.5-1.5B-Instruct \
--dataset_name trl-lib/chatbot_arena_completions \
--learning_rate 2e-4 \
--per_device_train_batch_size 4 \
--gradient_accumulation_steps 8 \
--lmbda 0.0 \
--output_dir distilled-model \
--num_train_epochs 1 \
--use_peft \
--lora_r 64 \
--lora_alpha 16
```
"""
import argparse
import os
# Enable logging in a Hugging Face Space
os.environ.setdefault("TRACKIO_SPACE_ID", "trl-trackio")
def main(script_args, training_args, model_args):
from datasets import load_dataset
from transformers import GenerationConfig
from trl import (
LogCompletionsCallback,
get_kbit_device_map,
get_peft_config,
get_quantization_config,
)
from trl.experimental.distillation import DistillationTrainer
################
# Model init kwargs
################
quantization_config = get_quantization_config(model_args)
model_kwargs = dict(
revision=model_args.model_revision,
attn_implementation=model_args.attn_implementation,
dtype=model_args.dtype,
use_cache=False if training_args.gradient_checkpointing else True,
device_map=get_kbit_device_map() if quantization_config is not None else None,
quantization_config=quantization_config,
)
training_args.model_init_kwargs = model_kwargs
teacher_model_kwargs = dict(
revision=training_args.teacher_model_revision,
attn_implementation=model_args.attn_implementation,
dtype=model_args.dtype,
use_cache=True,
device_map=get_kbit_device_map() if quantization_config is not None else None,
quantization_config=quantization_config,
)
if training_args.teacher_model_init_kwargs is not None:
teacher_model_kwargs.update(training_args.teacher_model_init_kwargs)
training_args.teacher_model_init_kwargs = teacher_model_kwargs
################
# Dataset
################
dataset = load_dataset(script_args.dataset_name, name=script_args.dataset_config)
################
# Training
################
eval_dataset = None
if training_args.eval_strategy != "no":
if script_args.dataset_test_split in dataset:
eval_dataset = dataset[script_args.dataset_test_split]
elif "validation" in dataset:
eval_dataset = dataset["validation"]
elif "dev" in dataset:
eval_dataset = dataset["dev"]
trainer = DistillationTrainer(
model=model_args.model_name_or_path,
teacher_model=training_args.teacher_model_name_or_path,
args=training_args,
train_dataset=dataset[script_args.dataset_train_split],
eval_dataset=eval_dataset,
peft_config=get_peft_config(model_args),
)
if training_args.eval_strategy != "no":
generation_config = GenerationConfig(
max_new_tokens=training_args.max_completion_length, do_sample=True, temperature=training_args.temperature
)
completions_callback = LogCompletionsCallback(trainer, generation_config, num_prompts=8)
trainer.add_callback(completions_callback)
trainer.train()
# Save and push to Hub
trainer.save_model(training_args.output_dir)
if training_args.push_to_hub:
trainer.push_to_hub(dataset_name=script_args.dataset_name)
def make_parser(subparsers: argparse._SubParsersAction | None = None, prog: str | None = None):
from trl import ModelConfig, ScriptArguments, TrlParser
from trl.experimental.distillation import DistillationConfig
dataclass_types = (ScriptArguments, DistillationConfig, ModelConfig)
if subparsers is not None:
parser = subparsers.add_parser(
"distillation", help="Run the distillation training script", dataclass_types=dataclass_types
)
else:
parser = TrlParser(dataclass_types, prog=prog)
return parser
if __name__ == "__main__":
parser = make_parser()
script_args, training_args, model_args = parser.parse_args_and_config(fail_with_unknown_args=False)
main(script_args, training_args, model_args)