liqi / code /pmps /train.py
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# Modified from codi_ori/train.py
# Key changes:
# 1. Import CODI_CT (now PMPS-enhanced) instead of CODI
# 2. Preprocess now computes cot_start_position and cot_end_position
# 3. DataCollator passes CoT-position fields to the model so the PMPS
# loss can extract teacher-side CoT hidden states.
# 4. CustomTrainer logs pmps_loss and related diagnostics
import copy
import logging
import os
import re
import random
from dataclasses import dataclass, field
from typing import Dict, Optional, Sequence
import torch
import json
import transformers
from torch.utils.data import Dataset
from transformers import Trainer
from safetensors.torch import load_file
from tqdm import tqdm
from math import ceil
from peft import PeftModel, LoraConfig, TaskType, get_peft_model
from datasets import load_dataset
from functools import partial
import yaml
import argparse
import wandb
from src.model import (
CODI_CT as CODI_PMPS,
ModelArguments,
DataArguments,
TrainingArguments,
freeze_model,
)
IGNORE_INDEX = -100
def read_json(file_path):
"""
从指定路径读取JSON文件并返回对应的Python对象。
"""
try:
with open(file_path, 'r', encoding='utf-8') as file:
data = json.load(file)
return data
except Exception as e:
print(f"读取JSON文件时出错: {e}")
return None
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
print(device)
class CustomTrainer(Trainer):
def compute_loss(self, model, inputs, num_items_in_batch):
step = self.state.global_step
batch_size = self.args.per_device_train_batch_size
gradient_accumulation_steps = self.args.gradient_accumulation_steps
num_epochs = self.args.num_train_epochs
dataset_size = len(self.train_dataset)
effective_batch_size = batch_size * self.args.world_size * gradient_accumulation_steps
total_steps = ceil(dataset_size / effective_batch_size) * num_epochs
inputs["step_ratio"] = step / total_steps
inputs["step"] = step
outputs = model(**inputs)
if self.state.epoch is None:
raise RuntimeError("self.state.epoch is not set")
current_epoch = self.state.epoch
if current_epoch >= self.args.pmps_start_epoch:
loss = outputs["loss"]
else:
loss = outputs["no_pmps_loss"]
# Store custom metrics for logging at every step
self._custom_metrics = {
"train/ce_loss": outputs["ce_loss"],
"train/distill_loss": outputs["distill_loss"],
"train/ref_ce_loss": outputs["ref_ce_loss"],
"train/pmps_loss": outputs.get("pmps_loss", 0),
"train/pmps_loss_c2l": outputs.get("pmps_loss_c2l", 0),
"train/pmps_loss_l2c": outputs.get("pmps_loss_l2c", 0),
"train/code_entropy_latent": outputs.get("code_entropy_latent", 0),
"train/code_entropy_cot": outputs.get("code_entropy_cot", 0),
"train/match_entropy_c2l": outputs.get("match_entropy_c2l", 0),
"train/match_order_correlation": outputs.get("match_order_correlation", 0),
"train/position_bias_strength": outputs.get("position_bias_strength", 0),
"train/diversity_loss": outputs.get("diversity_loss", 0),
"train/latent_avg_cosine_sim": outputs.get("latent_avg_cosine_sim", 0),
"train/total_loss": loss.item(),
"train/no_pmps_loss": outputs["no_pmps_loss"].item() if isinstance(outputs["no_pmps_loss"], torch.Tensor) else outputs["no_pmps_loss"],
}
return loss
def log(self, logs, start_time=None):
# Merge custom metrics into the logs dict so they are all sent
# to wandb (and other loggers) in a single call
if hasattr(self, "_custom_metrics") and self._custom_metrics:
logs.update(self._custom_metrics)
self._custom_metrics = {}
super().log(logs)
def _tokenize_fn(strings: Sequence[str], tokenizer: transformers.PreTrainedTokenizer) -> Dict:
"""Tokenize a list of strings."""
tokenized_list = [
tokenizer(
text,
return_tensors="pt",
padding="longest",
max_length=256,
truncation=True,
return_attention_mask=False,
)
for text in strings
]
input_ids = labels = [tokenized.input_ids[0] for tokenized in tokenized_list]
input_ids_lens = labels_lens = [
tokenized.input_ids.ne(tokenizer.pad_token_id).sum().item() for tokenized in tokenized_list
]
return dict(
input_ids=input_ids,
labels=labels,
input_ids_lens=input_ids_lens,
labels_lens=labels_lens,
)
def extract_answer_number(sentence: str) -> float:
sentence = sentence.replace(",", "")
pred = [s for s in re.findall(r"-?\d+\.?\d*", sentence)]
if not pred:
return float("inf")
segment = [sentence]
if len(segment) > 1:
pred_answer = segment[1]
pred_answer = [s for s in re.findall(r"-?\d+\.?\d*", pred_answer)]
if len(pred_answer) > 0:
pred_answer = pred_answer[0]
else:
pred_answer = float(pred[-1])
else:
pred_answer = float(pred[-1])
if isinstance(pred_answer, str):
try:
pred_answer = float(pred_answer)
except ValueError:
pred_answer = float("inf")
return pred_answer
def train():
arg_parser = argparse.ArgumentParser(description="CODI Training with YAML config support")
arg_parser.add_argument("--config_file", type=str, default=None, help="Path to YAML config file")
args, remaining_args = arg_parser.parse_known_args()
# If config_file is provided, load from YAML
if args.config_file:
print(f"Loading configuration from YAML file: {args.config_file}")
with open(args.config_file, 'r') as f:
config = yaml.safe_load(f)
# Convert YAML config to command line arguments
cmd_args = []
for key, value in config.items():
if value is None:
continue
if isinstance(value, bool):
if value:
cmd_args.extend([f"--{key}", "True"])
else:
cmd_args.extend([f"--{key}", "False"])
else:
cmd_args.extend([f"--{key}", str(value)])
# Parse with HfArgumentParser
parser = transformers.HfArgumentParser((ModelArguments, DataArguments, TrainingArguments))
model_args, data_args, training_args = parser.parse_args_into_dataclasses(args=cmd_args)
else:
# Original behavior: parse from command line
print("Loading configuration from command line arguments")
parser = transformers.HfArgumentParser((ModelArguments, DataArguments, TrainingArguments))
model_args, data_args, training_args = parser.parse_args_into_dataclasses()
##########################
# Peft Model #
##########################
if model_args.lora_init:
task_type = TaskType.CAUSAL_LM
if any(name in model_args.model_name_or_path.lower() for name in ["llama", "mistral", "falcon", "qwen"]):
target_modules = ["q_proj", "k_proj", "v_proj", "o_proj", "up_proj", "down_proj", "gate_proj"]
elif any(name in model_args.model_name_or_path.lower() for name in ["phi"]):
target_modules = ["q_proj", "k_proj", "v_proj", "dense", "fc1", "fc2"]
elif any(name in model_args.model_name_or_path.lower() for name in ["gpt2"]):
target_modules = ["c_attn", "c_proj", "c_fc"]
else:
raise ValueError(f"Only support LLAMA, Mistral, Falcon, Phi-2, but got {model_args.model_name_or_path}.")
lora_config = LoraConfig(
task_type=task_type,
inference_mode=False,
r=model_args.lora_r,
lora_alpha=model_args.lora_alpha,
lora_dropout=0.1,
target_modules=target_modules,
init_lora_weights=True,
)
model = CODI_PMPS(model_args, training_args, lora_config)
tokenizer = transformers.AutoTokenizer.from_pretrained(
model_args.model_name_or_path,
token=model_args.token,
cache_dir=training_args.cache_dir,
model_max_length=training_args.model_max_length,
padding_side="right",
)
if tokenizer.pad_token_id is None:
tokenizer.add_special_tokens({"pad_token": "[PAD]"})
tokenizer.pad_token_id = model.pad_token_id
if tokenizer.pad_token_id is None:
tokenizer.pad_token_id = tokenizer.convert_tokens_to_ids("[PAD]")
def get_answer_token_position(tokens, answer_prompts, tokenizer):
try:
match_indices = (
(tokens.unfold(0, len(answer_prompts[0]), 1) == answer_prompts[0])
.all(dim=1)
.nonzero(as_tuple=True)[0]
.item()
)
answer_token_id = match_indices + len(answer_prompts[0])
return answer_token_id
except Exception:
breakpoint()
def preprocess(
sources: Sequence[str],
targets: Sequence[str],
answers: Sequence[str],
tokenizer: transformers.PreTrainedTokenizer,
bot_id: int,
eot_id: int,
) -> Dict:
"""
Preprocess data for CODI_CT training.
Key difference from codi_ori: we also compute cot_start_position and
cot_end_position to identify the CoT token range within ref_input_ids.
These positions are used to extract CoT hidden states for CT loss.
"""
print("Tokenizing inputs... This may take some time...")
sources_id = _tokenize_fn(sources, tokenizer)["input_ids"]
cot_id = _tokenize_fn(targets, tokenizer)["input_ids"]
answers_id = _tokenize_fn(answers, tokenizer)["input_ids"]
# Add eos token to accommodate pretrained model's format
if not training_args.remove_eos:
sources_id = [torch.tensor(x.numpy().tolist() + [tokenizer.eos_token_id], dtype=torch.long) for x in sources_id]
cot_id = [torch.tensor(x.numpy().tolist() + [tokenizer.eos_token_id], dtype=torch.long) for x in cot_id]
answers_id = [torch.tensor(x.numpy().tolist() + [tokenizer.eos_token_id], dtype=torch.long) for x in answers_id]
if cot_id[0][0] == tokenizer.bos_token_id:
cot_id = [x[1:] for x in cot_id]
answers_id = [x[1:] for x in answers_id]
ref_input_ids = [
torch.cat([x, y, z]).to(torch.long) for x, y, z in zip(sources_id, cot_id, answers_id)
]
ref_labels = []
for x, y in zip(ref_input_ids, sources_id):
z = x.clone()
z[: len(y)] = -100
ref_labels.append(z)
# ===== NEW: Compute CoT position range in ref_input_ids =====
# ref_input_ids = [question_tokens | cot_tokens | answer_tokens]
# cot_start = len(question_tokens), cot_end = len(question_tokens) + len(cot_tokens)
cot_start_position = [len(src) for src in sources_id]
cot_end_position = [len(src) + len(cot) for src, cot in zip(sources_id, cot_id)]
# Add eot to source
sources_id = [
torch.tensor(x.numpy().tolist() + [bot_id], dtype=torch.long) for x in sources_id
]
# Add eot and eos
if training_args.remove_eos:
answers_id = [
torch.tensor([eot_id] + x.numpy().tolist(), dtype=torch.long) for x in answers_id
]
else:
answers_id = [
torch.tensor([eot_id, tokenizer.eos_token_id] + x.numpy().tolist(), dtype=torch.long)
for x in answers_id
]
answer_prompts = [
torch.tensor(tokenizer.encode("The answer is:")),
torch.tensor(tokenizer.encode("The next step result is:")),
]
if answer_prompts[0][0] == tokenizer.bos_token_id:
answer_prompts[0] = answer_prompts[0][1:]
answer_prompts[1] = answer_prompts[1][1:]
ref_answer_position = [
get_answer_token_position(x, answer_prompts, tokenizer) for i, x in enumerate(ref_input_ids)
]
model_answer_position = [
get_answer_token_position(x, answer_prompts, tokenizer) for x in answers_id
]
ref_eos_position = [len(x) - 1 for x in ref_input_ids]
model_eos_position = [len(x) - 1 for x in answers_id]
return dict(
encoder_input_ids=sources_id,
decoder_input_ids=answers_id,
ref_input_ids=ref_input_ids,
labels=answers_id,
ref_answer_position=ref_answer_position,
model_answer_position=model_answer_position,
ref_eos_position=ref_eos_position,
model_eos_position=model_eos_position,
ref_labels=ref_labels,
cot_start_position=cot_start_position, # NEW
cot_end_position=cot_end_position, # NEW
)
class SupervisedDataset(Dataset):
QUESTION_PROMPT = "\nAnswer the above question. First think step by step and then answer the final number.\n"
QUESTION_DA_PROMPT = "\nAnswer the above question. Answer the final number directly in one number.\n"
def __init__(self, data_name, raw_data, tokenizer, bot, eot):
super(SupervisedDataset, self).__init__()
logging.warning("Formatting inputs...")
self.data_name = data_name
questions, cots, answers = [], [], []
if "math" in self.data_name:
print("loading MATH training data")
raw_data = read_json('/data/oss_bucket_0/liqi/dataset/MATH/train_clean.json')
# raw_data is already loaded from data_path in make_supervised_data_module
elif "icot-full" in self.data_name:
print("loading gsm8k-aug-nl training data")
raw_data = read_json('/data/oss_bucket_0/liqi/dataset/gsm8k-aug-nl/train.json')
else:
print("loading gsm9k-aug training data")
raw_data = read_json('/data/oss_bucket_0/liqi/gsk8k-aug/gsm_train.json')
for num_iter, example in enumerate(raw_data):
if training_args.exp_mode and num_iter > training_args.exp_data_num:
break
if "icot" in self.data_name and "full" in self.data_name: # icot-full (GSM8k-Aug-NL)
question = f"{example['question']}"
if example["answer"] is None:
continue
example['cot'] = ' '.join(example['steps'])
token_num = len(tokenizer.encode(example["question"] + example["cot"] + example["answer"]))
if token_num > training_args.max_token_num:
continue
cot = f"{example['cot']}".split(". ")
if not training_args.include_last_cot:
cot = cot[:-1]
answer = example["answer"].split(" ")[-1]
if not answer[0].isdigit():
continue
answer = f"The answer is: {answer}"
answer = answer.replace("####", "")
questions.append(question)
if cot:
cot = ". ".join(cot) + ".\n"
else:
cot = ""
cots.append(cot)
answers.append(answer)
elif "icot" in self.data_name: # icot (GSM8k-Aug)
question = f"{example['question']}"
if "cot" not in example:
example["cot"] = example["steps"]
example['cot'] = ' '.join(example['cot'])
token_num = len(tokenizer.encode(example["question"] + example["cot"] + example["answer"]))
if token_num > training_args.max_token_num:
continue
cot = f"{example['cot']}".split(" ")
if not training_args.include_last_cot:
cot = cot[:-1]
# if len(cot) == 0:
# continue
answer = example['answer'].split(' ')[-1]
# some answers startwith the negative sign (-), bringing distillation problems for LLaMA
if not answer[0].isdigit():
continue
answer = f"The answer is: {answer}"
answer = answer.replace("####", "")
questions.append(question)
cots.append(" ".join(cot))
answers.append(answer)
elif "commonsense" in self.data_name or "strategy" in self.data_name:
question = example["question"].strip() + "\n"
cot = example["cot"].strip() + "\n"
answer = f"The answer is: {str(example['answer']).strip()}"
token_num = len(tokenizer.encode(question + " " + cot + " " + answer))
if token_num > training_args.max_token_num:
continue
questions.append(question)
cots.append(cot)
answers.append(answer)
elif "prontoqa" in data_args.data_name:
question = example["question"].strip() + "\n"
cot = "\n".join(example["steps"][:-1]) + "\n"
answer = f"The answer is: {str(example['answer']).strip()}"
token_num = len(tokenizer.encode(question + " " + cot + " " + answer))
if token_num > training_args.max_token_num:
continue
questions.append(question)
cots.append(cot)
answers.append(answer)
elif "math" in self.data_name:
# MATH dataset: problem -> question, solution -> full CoT, answer -> final answer
question = example["problem"].strip() + "\n"
cot = example["solution"].strip() + "\n" # Keep full CoT, no step deletion
answer = f"The answer is: {str(example['answer']).strip()}"
token_num = len(tokenizer.encode(question + " " + cot + " " + answer))
if token_num > training_args.max_token_num:
continue
questions.append(question)
cots.append(cot)
answers.append(answer)
else:
raise NotImplementedError
if training_args.exp_mode:
questions = questions[: training_args.exp_data_num]
cots = cots[: training_args.exp_data_num]
answers = answers[: training_args.exp_data_num]
print(f"{len(cots)} data in total...")
logging.warning("Tokenizing inputs... This may take some time...")
self.data_dict = preprocess(questions, cots, answers, tokenizer, bot, eot)
self.keys = list(self.data_dict.keys())
def __len__(self):
return len(self.data_dict["encoder_input_ids"])
def __getitem__(self, i) -> Dict[str, torch.Tensor]:
return {key: self.data_dict[key][i] for key in self.keys}
@dataclass
class DataCollatorForSupervisedDataset(object):
"""Collate examples for supervised fine-tuning with CT support."""
tokenizer: transformers.PreTrainedTokenizer
def __call__(self, instances: Sequence[Dict]) -> Dict[str, torch.Tensor]:
(
encoder_input_ids,
decoder_input_ids,
ref_input_ids,
labels,
ref_answer_position,
model_answer_position,
ref_labels,
cot_start_position,
cot_end_position,
) = tuple(
[instance[key] for instance in instances]
for key in (
"encoder_input_ids",
"decoder_input_ids",
"ref_input_ids",
"labels",
"ref_answer_position",
"model_answer_position",
"ref_labels",
"cot_start_position",
"cot_end_position",
)
)
# Pad left for encoder
reversed_input_ids = [seq.flip(0) for seq in encoder_input_ids]
encoder_input_ids = torch.nn.utils.rnn.pad_sequence(
reversed_input_ids, batch_first=True, padding_value=self.tokenizer.pad_token_id
).flip(1)
# Pad right for ref and decoder
ref_input_ids = torch.nn.utils.rnn.pad_sequence(
ref_input_ids, batch_first=True, padding_value=self.tokenizer.pad_token_id
)
ref_labels = torch.nn.utils.rnn.pad_sequence(
ref_labels, batch_first=True, padding_value=IGNORE_INDEX
)
decoder_input_ids = torch.nn.utils.rnn.pad_sequence(
decoder_input_ids, batch_first=True, padding_value=self.tokenizer.pad_token_id
)
labels = torch.nn.utils.rnn.pad_sequence(
labels, batch_first=True, padding_value=IGNORE_INDEX
)
return dict(
encoder_input_ids=encoder_input_ids,
decoder_input_ids=decoder_input_ids,
ref_input_ids=ref_input_ids,
labels=labels,
encoder_attention_mask=encoder_input_ids.ne(self.tokenizer.pad_token_id),
ref_answer_position=torch.tensor(ref_answer_position, dtype=torch.long),
model_answer_position=torch.tensor(model_answer_position, dtype=torch.long),
ref_attention_mask=ref_input_ids.ne(self.tokenizer.pad_token_id),
ref_labels=ref_labels,
cot_start_position=torch.tensor(cot_start_position, dtype=torch.long), # NEW
cot_end_position=torch.tensor(cot_end_position, dtype=torch.long), # NEW
)
def make_supervised_data_module(tokenizer, data_args) -> Dict:
"""Make dataset and collator for supervised fine-tuning."""
logging.warning("Downloading Data")
if "icot" in data_args.data_name:
if "full" in data_args.data_name:
dataset = None
else:
dataset = None
train_dataset = SupervisedDataset(
data_name=data_args.data_name,
raw_data=dataset,
tokenizer=tokenizer,
bot=model.bot_id,
eot=model.eot_id,
)
data_collator = DataCollatorForSupervisedDataset(tokenizer=tokenizer)
return dict(train_dataset=train_dataset, eval_dataset=None, data_collator=data_collator)
elif "strategy" in data_args.data_name:
dataset = load_dataset("zen-E/StrategyQA_CoT_GPT4o")["train"]
train_dataset = SupervisedDataset(
data_name=data_args.data_name,
raw_data=dataset,
tokenizer=tokenizer,
bot=model.bot_id,
eot=model.eot_id,
)
data_collator = DataCollatorForSupervisedDataset(tokenizer=tokenizer)
return dict(train_dataset=train_dataset, eval_dataset=None, data_collator=data_collator)
elif "commonsense" in data_args.data_name:
dataset = load_dataset("zen-E/CommonsenseQA-GPT4omini")["train"]
train_dataset = SupervisedDataset(
data_name=data_args.data_name,
raw_data=dataset,
tokenizer=tokenizer,
bot=model.bot_id,
eot=model.eot_id,
)
data_collator = DataCollatorForSupervisedDataset(tokenizer=tokenizer)
return dict(train_dataset=train_dataset, eval_dataset=None, data_collator=data_collator)
elif "prontoqa" in data_args.data_name:
with open("/home/ubuntu/coconut/data/prontoqa_train.json") as f:
dataset = json.load(f)
train_dataset = SupervisedDataset(
data_name=data_args.data_name,
raw_data=dataset,
tokenizer=tokenizer,
bot=model.bot_id,
eot=model.eot_id,
)
data_collator = DataCollatorForSupervisedDataset(tokenizer=tokenizer)
return dict(train_dataset=train_dataset, eval_dataset=None, data_collator=data_collator)
elif "math" in data_args.data_name:
# assert data_args.data_path is not None, "data_path must be provided for MATH dataset"
# dataset = read_json(data_args.data_path)
dataset = None
train_dataset = SupervisedDataset(
data_name=data_args.data_name,
raw_data=dataset,
tokenizer=tokenizer,
bot=model.bot_id,
eot=model.eot_id,
)
data_collator = DataCollatorForSupervisedDataset(tokenizer=tokenizer)
return dict(train_dataset=train_dataset, eval_dataset=None, data_collator=data_collator)
else:
raise NotImplementedError(f"Dataset {data_args.data_name} is not supported.")
training_args.output_dir = os.path.join(
training_args.output_dir,
training_args.expt_name
)
# ===== Save all input arguments to a JSON file =====
os.makedirs(training_args.output_dir, exist_ok=True)
from dataclasses import asdict
all_args = {
"model_args": asdict(model_args),
"data_args": asdict(data_args),
"training_args": {k: v for k, v in asdict(training_args).items()
if not k.startswith("_")},
}
args_save_path = os.path.join(training_args.output_dir, "training_arguments.json")
with open(args_save_path, "w", encoding="utf-8") as f:
json.dump(all_args, f, ensure_ascii=False, indent=4, default=str)
print(f"All training arguments saved to {args_save_path}")
# ===== Wandb Initialization =====
if training_args.use_wandb and int(os.environ.get("RANK", 0)) == 0:
if training_args.wandb_api_key:
wandb.login(key=training_args.wandb_api_key)
run_name = training_args.wandb_run_name or training_args.expt_name
wandb.init(
project=training_args.wandb_project,
name=run_name,
config={
"model_name_or_path": model_args.model_name_or_path,
"lora_r": model_args.lora_r,
"lora_alpha": model_args.lora_alpha,
"num_latent": training_args.num_latent,
"learning_rate": training_args.learning_rate,
"per_device_train_batch_size": training_args.per_device_train_batch_size,
"gradient_accumulation_steps": training_args.gradient_accumulation_steps,
"num_train_epochs": training_args.num_train_epochs,
"pmps_loss_factor": training_args.pmps_loss_factor,
"pmps_temperature": training_args.pmps_temperature,
"pmps_match_temperature": training_args.pmps_match_temperature,
"pmps_nmb_prototypes": training_args.pmps_nmb_prototypes,
"pmps_use_projector": training_args.pmps_use_projector,
"pmps_layer": training_args.pmps_layer,
"pmps_start_epoch": training_args.pmps_start_epoch,
"pmps_position_bias_max": training_args.pmps_position_bias_max,
"pmps_position_bias_schedule": training_args.pmps_position_bias_schedule,
"diversity_loss_factor": training_args.diversity_loss_factor,
"distill_loss_factor": training_args.distill_loss_factor,
},
)
training_args.report_to = ["wandb"]
print("Wandb initialized successfully.")
elif not training_args.use_wandb:
os.environ["WANDB_DISABLED"] = "true"
data_module = make_supervised_data_module(tokenizer=tokenizer, data_args=data_args)
trainer = CustomTrainer(model=model, tokenizer=tokenizer, args=training_args, **data_module)
trainer.train()
trainer.save_state()
trainer.save_model(output_dir=training_args.output_dir)
if __name__ == "__main__":
train()