code/utils/warp.py

import torch
import re
from configs.hyperparametric import Reward_config

from transformers import AutoTokenizer, AutoModelForCausalLM, Trainer, TrainingArguments
from model.logitsprocessor import OutputControlLogitsProcessor,RewardControlLogitsProcessor
from tree.asts import AST

#reward_config = Reward_config()

def find_subarray_positions(large_array, small_array):
    n = len(small_array)
    result = []
    
    for i in range(len(large_array) - n + 1):
        if large_array[i:i+n] == small_array:
            result.append(i)
    
    return result

class Warp():
    def __init__(self,args,):
        self.args = args
        self.generate_tokenizer = None
        self.generate_model = None
        self.logits_processor = None
        self.reward_tokenizer = None
        self.reward_model = None
        self.reward_processor = None

    def load_generate_model(self):
        args = self.args
        self.generate_tokenizer = AutoTokenizer.from_pretrained(args.generate_model_path, trust_remote_code=True)
        self.generate_model = AutoModelForCausalLM.from_pretrained(args.generate_model_path,trust_remote_code=True).half().cuda()

        if args.logits_control:
            syntax_tree = AST(path=args.control_file,tokenizer=self.generate_tokenizer)
            self.logits_processor = OutputControlLogitsProcessor(ast=syntax_tree, tokenizer=self.generate_tokenizer)

        if re.search('<think>',self.generate_tokenizer.chat_template):
            self.generate_tokenizer.chat_template = re.sub('<think>','',self.generate_tokenizer.chat_template)

        self.none_token = '<p>none</p>'
        self.generate_bos = self.generate_tokenizer.bos_token
        self.generate_eos = self.generate_tokenizer.eos_token 

    def load_reward_model(self,**kwargs):
        args = self.args
        if 'bnb_config' in kwargs.keys():
            self.reward_model = AutoModelForCausalLM.from_pretrained(args.reward_model_path,
                                                                     trust_remote_code=True,
                                                                     device_map='auto', 
                                                                     quantization_config=kwargs['bnb_config'],
                                                                     )
        else:
            self.reward_model = AutoModelForCausalLM.from_pretrained(args.reward_model_path,
                                                                     trust_remote_code=True
                                                                     ).half().cuda()
        self.reward_tokenizer = AutoTokenizer.from_pretrained(args.reward_model_path, trust_remote_code=True)
        
        if args.logits_control:
            self.reward_processor = RewardControlLogitsProcessor(tokenizer=self.generate_tokenizer)


        if re.search('<think>',self.reward_tokenizer.chat_template):
            self.reward_tokenizer.chat_template = re.sub('<think>','',self.reward_tokenizer.chat_template)

    @staticmethod
    def template_to_qwen(x,bos='<|im_start|>',eos='<|im_end|>'):
        return """system\n{system}{eos}\n{bos}user\n{query}{eos}\n{bos}assistant\n""".format(
            bos=bos,
            eos=eos,
            system="You are a helpful assistant.", 
            query=x
        )
    
    @staticmethod
    def assistant_from_template_in_response(x,bos='<|im_start|>',eos='<|im_end|>'):
        processed_string = x.split(bos)[3].strip()
        processed_string = processed_string.split(eos)[0].strip()
        processed_string = re.sub('^assistant','',processed_string).strip()
        return processed_string

    @staticmethod
    def step_from_response(x):
        step = '</none_response>'
        if '</think>' in x:
            x = x.split('</think>')[-1].strip()
        if '<p>' in x:
            x_ = re.search('<p>.+</p>',x)
            step = x_.group() if x_ else x
        if '<e>' in x:
            x_ = re.search('<e>.+</e>',x)
            step = x_.group() if x_ else x    
        return step

    @staticmethod
    def value_from_response(x):
        if '<v>' in x:
            x_ = re.search('<v>\w+</v>',x)
            return x_.group()[3:-4] if x_ else ''
            #return float(x_.group()[3:-4])/100 if x_ else 0
        return ''

class WarpLJP(Warp):
    def __init__(self,args,mode='p'):
        super().__init__(args)
        self.mode = mode
    
    def processing_single(self,x,mode=''):
        self.none_token = '<p>无</p>'

        p = x['Procuratorate']
        a = []
        if 'd' in mode:
            for d in x['Defence'].split('。'):
                if len(d.strip()) > 0:
                    a.append(d)
        if 'f' in mode:
            for f in x['Fact'].split('。'):
                if len(f.strip()) > 0:
                    a.append(f)

        crime = [c['charge'] for c in x['Annotations'][0]['annotation']]
        penalty = [c['penalty'] for c in x['Annotations'][0]['annotation']]
        imprisonment = [c['imprisonment'] for c in x['Annotations'][0]['annotation']]

        label = {'crime':';'.join(['<e>{c}罪</e>'.format(c=c) for c in crime]),
                 'penalty':';'.join(['<e>{c}</e>'.format(c=c) for c in penalty]),
                 'imprisonment':';'.join(['<e>{c}</e>'.format(c=c) for c in imprisonment])}
        
        
        if a != []:
            a = [_ for _ in map(lambda x_:'<p>{i}</p>'.format(i=x_) if not x_.startswith('<p>') else x_,a)]
            return p,a,label
        else:
            return p,['<p>无</p>'],label
        
    @staticmethod
    def prompt_to_value(x,a,bos='<|im_start|>',eos='<|im_end|>'):  
        pmt = '根据案情描述对给出的已有推理步骤选择接受或拒绝，并在<v></v>中给出选择，例如<v>接受</v>\n案情描述:{x}\n已有推理步骤：\n{a}\n：'.format(x=x,a=a)    
        return Warp.template_to_qwen(pmt,bos=bos,eos=eos)

    @staticmethod
    def prompt_to_crime(x,a,bos='<|im_start|>',eos='<|im_end|>'):  
        pmt = '根据案情描述和已有步骤仅给出一个推理。如果是结论则直接输出<e></e>，例如<e>盗窃罪</e>。如果是步骤则直接输出<p></p>，例如<p>步骤1：…</p>\n案情描述:{x}\n已有推理步骤：\n{a}\n：'.format(x=x,a=a)    
        return Warp.template_to_qwen(pmt,bos=bos,eos=eos)