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# Copyright 2024 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.
"""
Run the KTO training script with the commands below. In general, the optimal configuration for KTO will be similar to that of DPO.
# Full training:
python examples/scripts/kto.py \
--dataset_name trl-lib/kto-mix-14k \
--model_name_or_path=trl-lib/qwen1.5-1.8b-sft \
--per_device_train_batch_size 16 \
--num_train_epochs 1 \
--learning_rate 5e-7 \
--lr_scheduler_type=cosine \
--gradient_accumulation_steps 1 \
--logging_steps 10 \
--eval_steps 500 \
--output_dir=kto-aligned-model \
--warmup_ratio 0.1 \
--report_to wandb \
--bf16 \
--logging_first_step
# QLoRA:
python examples/scripts/kto.py \
--dataset_name trl-lib/kto-mix-14k \
--model_name_or_path=trl-lib/qwen1.5-1.8b-sft \
--per_device_train_batch_size 8 \
--num_train_epochs 1 \
--learning_rate 5e-7 \
--lr_scheduler_type=cosine \
--gradient_accumulation_steps 1 \
--logging_steps 10 \
--eval_steps 500 \
--output_dir=kto-aligned-model-lora \
--warmup_ratio 0.1 \
--report_to wandb \
--bf16 \
--logging_first_step \
--use_peft \
--load_in_4bit \
--lora_target_modules=all-linear \
--lora_r=16 \
--lora_alpha=16
"""
from datasets import load_dataset
from transformers import AutoModelForCausalLM, AutoTokenizer, HfArgumentParser
from trl import (
KTOConfig,
KTOTrainer,
ModelConfig,
ScriptArguments,
get_peft_config,
setup_chat_format,
)
if __name__ == "__main__":
parser = HfArgumentParser((ScriptArguments, KTOConfig, ModelConfig))
script_args, training_args, model_args = parser.parse_args_into_dataclasses()
# Load a pretrained model
model = AutoModelForCausalLM.from_pretrained(
model_args.model_name_or_path, trust_remote_code=model_args.trust_remote_code
)
ref_model = AutoModelForCausalLM.from_pretrained(
model_args.model_name_or_path, trust_remote_code=model_args.trust_remote_code
)
tokenizer = AutoTokenizer.from_pretrained(
model_args.model_name_or_path, trust_remote_code=model_args.trust_remote_code
)
if tokenizer.pad_token is None:
tokenizer.pad_token = tokenizer.eos_token
# If we are aligning a base model, we use ChatML as the default template
if tokenizer.chat_template is None:
model, tokenizer = setup_chat_format(model, tokenizer)
# Load the dataset
dataset = load_dataset(script_args.dataset_name, name=script_args.dataset_config)
# Initialize the KTO trainer
trainer = KTOTrainer(
model,
ref_model,
args=training_args,
train_dataset=dataset[script_args.dataset_train_split],
eval_dataset=(
dataset[script_args.dataset_test_split]
if training_args.eval_strategy != "no"
else None
),
processing_class=tokenizer,
peft_config=get_peft_config(model_args),
)
# Train and push the model to the Hub
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)
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