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def main():
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parser = argparse.ArgumentParser(description="Finetune a base instruct/chat model using (Q)LoRA and PEFT using DPO (RLHF)")
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parser.add_argument('tuned_model', type=str,
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help='The name of the resulting tuned model.')
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parser.add_argument('dataset_name', type=str,
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help='The name of the dataset to use for fine-tuning. This should be the output of the combine_checkpoints script.')
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parser.add_argument('instruction_prompt', type=str,
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help='An instruction message added to every prompt given to the chatbot to force it to answer in the target language. Example: "You are a generic chatbot that always answers in English."')
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parser.add_argument('--base_model', type=str, default="NousResearch/Meta-Llama-3-8B-Instruct",
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help='The base foundation model. Default is "NousResearch/Meta-Llama-3-8B-Instruct".')
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parser.add_argument('--base_dataset_text_field', type=str, default="text",
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help="The dataset's column name containing the actual text to translate. Defaults to text")
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parser.add_argument('--base_dataset_rank_field', type=str, default="rank",
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help="The dataset's column name containing the rank of an answer given to a prompt. Defaults to rank")
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parser.add_argument('--base_dataset_id_field', type=str, default="message_id",
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help="The dataset's column name containing the id of a text. Defaults to message_id")
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parser.add_argument('--base_dataset_parent_field', type=str, default="parent_id",
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help="The dataset's column name containing the parent id of a text. Defaults to parent_id")
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parser.add_argument('--quant8', action='store_true',
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help='Finetunes the model in 8 bits. Requires more memory than the default 4 bit.')
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parser.add_argument('--noquant', action='store_true',
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help='Do not quantize the finetuning. Requires more memory than the default 4 bit and optional 8 bit.')
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parser.add_argument('--max_seq_length', type=int, default=512,
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help='The maximum sequence length to use in finetuning. Should most likely line up with your base model\'s default max_seq_length. Default is 512.')
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parser.add_argument('--max_prompt_length', type=int, default=512,
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help='The maximum length of the prompts to use. Default is 512.')
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parser.add_argument('--num_train_epochs', type=int, default=2,
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help='Number of epochs to use. 2 is default and has been shown to work well.')
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parser.add_argument('--batch_size', type=int, default=4,
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help='The batch size to use in finetuning. Adjust to fit in your GPU vRAM. Default is 4')
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parser.add_argument('--threads_output_name', type=str, default=None,
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help='If specified, the threads created in this script for finetuning will also be saved to disk or HuggingFace Hub.')
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parser.add_argument('--thread_template', type=str, default="threads/template_default.txt",
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help='A file containing the thread template to use. Default is threads/template_fefault.txt')
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parser.add_argument('--max_steps', type=int, default=-1,
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help='The maximum number of steps to run DPO for. Default is -1 which will run the data through fully for the number of epochs but this will be very time-consuming.')
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parser.add_argument('--padding', type=str, default="left",
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help='What padding to use, can be either left or right.')
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args = parser.parse_args()
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base_model = args.base_model
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tuned_model = args.tuned_model
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dataset_name = args.dataset_name
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instruction_prompt = args.instruction_prompt
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base_dataset_text_field = args.base_dataset_text_field
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base_dataset_rank_field = args.base_dataset_rank_field
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base_dataset_id_field = args.base_dataset_id_field
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base_dataset_parent_field = args.base_dataset_parent_field
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quant8 = args.quant8
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noquant = args.noquant
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max_seq_length = args.max_seq_length
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num_train_epochs = args.num_train_epochs
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per_device_train_batch_size = args.batch_size
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threads_output_name = args.threads_output_name
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thread_template_file = args.thread_template
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max_prompt_length = args.max_prompt_length
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max_steps = args.max_steps
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padding = args.padding
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# Check for HF_TOKEN
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if 'HF_TOKEN' not in os.environ:
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print("[WARNING] Environment variable 'HF_TOKEN' is not set!")
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user_input = input("Do you want to continue? (yes/no): ").strip().lower()
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if user_input != "yes":
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print("Terminating the program.")
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exit()
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# Load the base translated dataset
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if os.path.isdir(dataset_name):
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dataset = load_from_disk(dataset_name)
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else:
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dataset = load_dataset(dataset_name)
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# Load base tokenizer
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tokenizer = AutoTokenizer.from_pretrained(base_model, trust_remote_code=True)
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# Get the template
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with open(thread_template_file, 'r', encoding="utf8") as f:
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chat_template = f.read()
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# Compute the threads
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prompts = {k: [] for k in dataset.keys()}
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for fold in prompts:
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print(f"[---- LLaMa2Lang ----] Generating prompts using chat template {thread_template_file} for fold {fold}")
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templated_prompts = finetune_prompts_dpo.create_prompts(dataset[fold], tokenizer, base_dataset_rank_field, base_dataset_parent_field, base_dataset_id_field, base_dataset_text_field, instruction_prompt, chat_template)
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prompts[fold] = Dataset.from_pandas(pd.DataFrame(data=templated_prompts))
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prompts = DatasetDict(prompts)
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# Check if we need to write out
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if threads_output_name is not None:
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# Also do the other folds
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print(f"[---- LLaMa2Lang ----] Writing out DPO thread prompts dataset to {threads_output_name}")
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if os.path.isdir(threads_output_name):
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prompts.save_to_disk(threads_output_name)
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else:
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prompts.push_to_hub(threads_output_name)
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if noquant:
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# Load base model
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model = AutoModelForCausalLM.from_pretrained(base_model, device_map={"": 0}, trust_remote_code=True)
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