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BERT的中文问答系统41

2024/11/30 6:47:37 来源:https://blog.csdn.net/weixin_54366286/article/details/143998846  浏览:    关键词:BERT的中文问答系统41

为了实现当用户在GUI中输入问题并标记回答为不正确时,将百度百科的搜索结果保存到历史记录中,并以指定的格式保存到文件中,我们对代码进行进一步的修改。以下是更新后的完整代码:

import os
import json
import jsonlines
import torch
import torch.optim as optim
from torch.utils.data import Dataset, DataLoader
from transformers import BertModel, BertTokenizer
import tkinter as tk
from tkinter import filedialog, messagebox, ttk
import logging
from difflib import SequenceMatcher
from datetime import datetime
import requests
from bs4 import BeautifulSoup# 获取项目根目录
PROJECT_ROOT = os.path.dirname(os.path.abspath(__file__))# 配置日志
LOGS_DIR = os.path.join(PROJECT_ROOT, 'logs')
os.makedirs(LOGS_DIR, exist_ok=True)def setup_logging():log_file = os.path.join(LOGS_DIR, datetime.now().strftime('%Y-%m-%d_%H-%M-%S_羲和.txt'))logging.basicConfig(level=logging.INFO,format='%(asctime)s - %(levelname)s - %(message)s',handlers=[logging.FileHandler(log_file),logging.StreamHandler()])setup_logging()# 数据集类
class XihuaDataset(Dataset):def __init__(self, file_path, tokenizer, max_length=128):self.tokenizer = tokenizerself.max_length = max_lengthself.data = self.load_data(file_path)def load_data(self, file_path):data = []if file_path.endswith('.jsonl'):with jsonlines.open(file_path) as reader:for i, item in enumerate(reader):try:data.append(item)except jsonlines.jsonlines.InvalidLineError as e:logging.warning(f"跳过无效行 {i + 1}: {e}")elif file_path.endswith('.json'):with open(file_path, 'r') as f:try:data = json.load(f)except json.JSONDecodeError as e:logging.warning(f"跳过无效文件 {file_path}: {e}")return datadef __len__(self):return len(self.data)def __getitem__(self, idx):item = self.data[idx]question = item['question']human_answer = item['human_answers'][0]chatgpt_answer = item['chatgpt_answers'][0]try:inputs = self.tokenizer(question, return_tensors='pt', padding='max_length', truncation=True, max_length=self.max_length)human_inputs = self.tokenizer(human_answer, return_tensors='pt', padding='max_length', truncation=True, max_length=self.max_length)chatgpt_inputs = self.tokenizer(chatgpt_answer, return_tensors='pt', padding='max_length', truncation=True, max_length=self.max_length)except Exception as e:logging.warning(f"跳过无效项 {idx}: {e}")return self.__getitem__((idx + 1) % len(self.data))return {'input_ids': inputs['input_ids'].squeeze(),'attention_mask': inputs['attention_mask'].squeeze(),'human_input_ids': human_inputs['input_ids'].squeeze(),'human_attention_mask': human_inputs['attention_mask'].squeeze(),'chatgpt_input_ids': chatgpt_inputs['input_ids'].squeeze(),'chatgpt_attention_mask': chatgpt_inputs['attention_mask'].squeeze(),'human_answer': human_answer,'chatgpt_answer': chatgpt_answer}# 获取数据加载器
def get_data_loader(file_path, tokenizer, batch_size=8, max_length=128):dataset = XihuaDataset(file_path, tokenizer, max_length)return DataLoader(dataset, batch_size=batch_size, shuffle=True)# 模型定义
class XihuaModel(torch.nn.Module):def __init__(self, pretrained_model_name='F:/models/bert-base-chinese'):super(XihuaModel, self).__init__()self.bert = BertModel.from_pretrained(pretrained_model_name)self.classifier = torch.nn.Linear(self.bert.config.hidden_size, 1)def forward(self, input_ids, attention_mask):outputs = self.bert(input_ids=input_ids, attention_mask=attention_mask)pooled_output = outputs.pooler_outputlogits = self.classifier(pooled_output)return logits# 训练函数
def train(model, data_loader, optimizer, criterion, device, progress_var=None):model.train()total_loss = 0.0num_batches = len(data_loader)for batch_idx, batch in enumerate(data_loader):try:input_ids = batch['input_ids'].to(device)attention_mask = batch['attention_mask'].to(device)human_input_ids = batch['human_input_ids'].to(device)human_attention_mask = batch['human_attention_mask'].to(device)chatgpt_input_ids = batch['chatgpt_input_ids'].to(device)chatgpt_attention_mask = batch['chatgpt_attention_mask'].to(device)optimizer.zero_grad()human_logits = model(human_input_ids, human_attention_mask)chatgpt_logits = model(chatgpt_input_ids, chatgpt_attention_mask)human_labels = torch.ones(human_logits.size(0), 1).to(device)chatgpt_labels = torch.zeros(chatgpt_logits.size(0), 1).to(device)loss = criterion(human_logits, human_labels) + criterion(chatgpt_logits, chatgpt_labels)loss.backward()optimizer.step()total_loss += loss.item()if progress_var:progress_var.set((batch_idx + 1) / num_batches * 100)except Exception as e:logging.warning(f"跳过无效批次: {e}")return total_loss / len(data_loader)# 主训练函数
def main_train(retrain=False):device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')logging.info(f'使用设备: {device}')tokenizer = BertTokenizer.from_pretrained('F:/models/bert-base-chinese')model = XihuaModel(pretrained_model_name='F:/models/bert-base-chinese').to(device)if retrain:model_path = os.path.join(PROJECT_ROOT, 'models/xihua_model.pth')if os.path.exists(model_path):model.load_state_dict(torch.load(model_path, map_location=device))logging.info("加载现有模型")else:logging.info("没有找到现有模型,将使用预训练模型")optimizer = optim.Adam(model.parameters(), lr=1e-5)criterion = torch.nn.BCEWithLogitsLoss()train_data_loader = get_data_loader(os.path.join(PROJECT_ROOT, 'data/train_data.jsonl'), tokenizer, batch_size=8, max_length=128)num_epochs = 30for epoch in range(num_epochs):train_loss = train(model, train_data_loader, optimizer, criterion, device)logging.info(f'Epoch [{epoch+1}/{num_epochs}], Loss: {train_loss:.10f}')torch.save(model.state_dict(), os.path.join(PROJECT_ROOT, 'models/xihua_model.pth'))logging.info("模型训练完成并保存")# 网络搜索函数
def search_baidu(query):url = f"https://www.baidu.com/s?wd={query}"headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'}response = requests.get(url, headers=headers)soup = BeautifulSoup(response.text, 'html.parser')results = soup.find_all('div', class_='c-abstract')if results:return results[0].get_text().strip()return "没有找到相关信息"# 百度百科搜索函数
def search_baidu_baike(query):url = f"https://baike.baidu.com/item/{query}"headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'}response = requests.get(url, headers=headers)soup = BeautifulSoup(response.text, 'html.parser')meta_description = soup.find('meta', attrs={'name': 'description'})if meta_description:return meta_description['content']return "没有找到相关信息"# GUI界面
class XihuaChatbotGUI:def __init__(self, root):self.root = rootself.root.title("羲和聊天机器人")self.tokenizer = BertTokenizer.from_pretrained('F:/models/bert-base-chinese')self.device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')self.model = XihuaModel(pretrained_model_name='F:/models/bert-base-chinese').to(self.device)self.load_model()self.model.eval()# 加载训练数据集以便在获取答案时使用self.data = self.load_data(os.path.join(PROJECT_ROOT, 'data/train_data.jsonl'))# 历史记录self.history = []self.create_widgets()def create_widgets(self):# 设置样式style = ttk.Style()style.theme_use('clam')# 顶部框架top_frame = ttk.Frame(self.root)top_frame.pack(pady=10)self.question_label = ttk.Label(top_frame, text="问题:", font=("Arial", 12))self.question_label.grid(row=0, column=0, padx=10)self.question_entry = ttk.Entry(top_frame, width=50, font=("Arial", 12))self.question_entry.grid(row=0, column=1, padx=10)self.answer_button = ttk.Button(top_frame, text="获取回答", command=self.get_answer, style='TButton')self.answer_button.grid(row=0, column=2, padx=10)# 中部框架middle_frame = ttk.Frame(self.root)middle_frame.pack(pady=10)self.chat_text = tk.Text(middle_frame, height=20, width=100, font=("Arial", 12), wrap='word')self.chat_text.grid(row=0, column=0, padx=10, pady=10)self.chat_text.tag_configure("user", justify='right', foreground='blue')self.chat_text.tag_configure("xihua", justify='left', foreground='green')# 底部框架bottom_frame = ttk.Frame(self.root)bottom_frame.pack(pady=10)self.correct_button = ttk.Button(bottom_frame, text="准确", command=self.mark_correct, style='TButton')self.correct_button.grid(row=0, column=0, padx=10)self.incorrect_button = ttk.Button(bottom_frame, text="不准确", command=self.mark_incorrect, style='TButton')self.incorrect_button.grid(row=0, column=1, padx=10)self.train_button = ttk.Button(bottom_frame, text="训练模型", command=self.train_model, style='TButton')self.train_button.grid(row=0, column=2, padx=10)self.retrain_button = ttk.Button(bottom_frame, text="重新训练模型", command=lambda: self.train_model(retrain=True), style='TButton')self.retrain_button.grid(row=0, column=3, padx=10)self.progress_var = tk.DoubleVar()self.progress_bar = ttk.Progressbar(bottom_frame, variable=self.progress_var, maximum=100, length=200, mode='determinate')self.progress_bar.grid(row=1, column=0, columnspan=4, pady=10)self.log_text = tk.Text(bottom_frame, height=10, width=70, font=("Arial", 12))self.log_text.grid(row=2, column=0, columnspan=4, pady=10)self.evaluate_button = ttk.Button(bottom_frame, text="评估模型", command=self.evaluate_model, style='TButton')self.evaluate_button.grid(row=3, column=0, padx=10, pady=10)self.history_button = ttk.Button(bottom_frame, text="查看历史记录", command=self.view_history, style='TButton')self.history_button.grid(row=3, column=1, padx=10, pady=10)self.save_history_button = ttk.Button(bottom_frame, text="保存历史记录", command=self.save_history, style='TButton')self.save_history_button.grid(row=3, column=2, padx=10, pady=10)def get_answer(self):question = self.question_entry.get()if not question:messagebox.showwarning("输入错误", "请输入问题")returninputs = self.tokenizer(question, return_tensors='pt', padding='max_length', truncation=True, max_length=128)with torch.no_grad():input_ids = inputs['input_ids'].to(self.device)attention_mask = inputs['attention_mask'].to(self.device)logits = self.model(input_ids, attention_mask)if logits.item() > 0:answer_type = "羲和回答"else:answer_type = "零回答"specific_answer = self.get_specific_answer(question, answer_type)self.chat_text.insert(tk.END, f"用户: {question}\n", "user")self.chat_text.insert(tk.END, f"羲和: {specific_answer}\n", "xihua")# 添加到历史记录self.history.append({'question': question,'answer_type': answer_type,'specific_answer': specific_answer,'accuracy': None,  # 初始状态为未评价'baidu_baike': None  # 初始状态为无百度百科结果})def get_specific_answer(self, question, answer_type):# 使用模糊匹配查找最相似的问题best_match = Nonebest_ratio = 0.0for item in self.data:ratio = SequenceMatcher(None, question, item['question']).ratio()if ratio > best_ratio:best_ratio = ratiobest_match = itemif best_match:if answer_type == "羲和回答":return best_match['human_answers'][0]else:return best_match['chatgpt_answers'][0]return "这个我也不清楚,你问问零吧"def load_data(self, file_path):data = []if file_path.endswith('.jsonl'):with jsonlines.open(file_path) as reader:for i, item in enumerate(reader):try:data.append(item)except jsonlines.jsonlines.InvalidLineError as e:logging.warning(f"跳过无效行 {i + 1}: {e}")elif file_path.endswith('.json'):with open(file_path, 'r') as f:try:data = json.load(f)except json.JSONDecodeError as e:logging.warning(f"跳过无效文件 {file_path}: {e}")return datadef load_model(self):model_path = os.path.join(PROJECT_ROOT, 'models/xihua_model.pth')if os.path.exists(model_path):self.model.load_state_dict(torch.load(model_path, map_location=self.device))logging.info("加载现有模型")else:logging.info("没有找到现有模型,将使用预训练模型")def train_model(self, retrain=False):file_path = filedialog.askopenfilename(filetypes=[("JSONL files", "*.jsonl"), ("JSON files", "*.json")])if not file_path:messagebox.showwarning("文件选择错误", "请选择一个有效的数据文件")returntry:dataset = XihuaDataset(file_path, self.tokenizer)data_loader = DataLoader(dataset, batch_size=8, shuffle=True)# 加载已训练的模型权重if retrain:self.model.load_state_dict(torch.load(os.path.join(PROJECT_ROOT, 'models/xihua_model.pth'), map_location=self.device))self.model.to(self.device)self.model.train()optimizer = torch.optim.Adam(self.model.parameters(), lr=1e-5)criterion = torch.nn.BCEWithLogitsLoss()num_epochs = 30for epoch in range(num_epochs):train_loss = train(self.model, data_loader, optimizer, criterion, self.device, self.progress_var)logging.info(f'Epoch [{epoch+1}/{num_epochs}], Loss: {train_loss:.10f}')self.log_text.insert(tk.END, f'Epoch [{epoch+1}/{num_epochs}], Loss: {train_loss:.10f}\n')self.log_text.see(tk.END)torch.save(self.model.state_dict(), os.path.join(PROJECT_ROOT, 'models/xihua_model.pth'))logging.info("模型训练完成并保存")self.log_text.insert(tk.END, "模型训练完成并保存\n")self.log_text.see(tk.END)messagebox.showinfo("训练完成", "模型训练完成并保存")except Exception as e:logging.error(f"模型训练失败: {e}")self.log_text.insert(tk.END, f"模型训练失败: {e}\n")self.log_text.see(tk.END)messagebox.showerror("训练失败", f"模型训练失败: {e}")def evaluate_model(self):# 这里可以添加模型评估的逻辑messagebox.showinfo("评估结果", "模型评估功能暂未实现")def mark_correct(self):if self.history:self.history[-1]['accuracy'] = Truemessagebox.showinfo("评价成功", "您认为这次回答是准确的")def mark_incorrect(self):if self.history:self.history[-1]['accuracy'] = Falsequestion = self.history[-1]['question']baike_answer = self.search_baidu_baike(question)self.chat_text.insert(tk.END, f"百度百科结果: {baike_answer}\n", "xihua")self.history[-1]['baidu_baike'] = baike_answermessagebox.showinfo("评价成功", "您认为这次回答是不准确的")def search_baidu_baike(self, query):return search_baidu_baike(query)def view_history(self):history_window = tk.Toplevel(self.root)history_window.title("历史记录")history_text = tk.Text(history_window, height=20, width=80, font=("Arial", 12))history_text.pack(padx=10, pady=10)for entry in self.history:history_text.insert(tk.END, f"问题: {entry['question']}\n")history_text.insert(tk.END, f"回答类型: {entry['answer_type']}\n")history_text.insert(tk.END, f"具体回答: {entry['specific_answer']}\n")if entry['accuracy'] is None:history_text.insert(tk.END, "评价: 未评价\n")elif entry['accuracy']:history_text.insert(tk.END, "评价: 准确\n")else:history_text.insert(tk.END, "评价: 不准确\n")if entry['baidu_baike']:history_text.insert(tk.END, f"百度百科结果: {entry['baidu_baike']}\n")history_text.insert(tk.END, "-" * 50 + "\n")def save_history(self):file_path = filedialog.asksaveasfilename(defaultextension=".txt", filetypes=[("Text files", "*.txt")])if not file_path:returnwith open(file_path, 'w', encoding='utf-8') as f:for entry in self.history:record = {"question": entry['question'],"human_answers": [entry['specific_answer']] if entry['accuracy'] or entry['baidu_baike'] is None else [entry['baidu_baike']],"chatgpt_answers": [entry['specific_answer']] if entry['accuracy'] or entry['baidu_baike'] is None else [entry['baidu_baike']]}f.write(json.dumps(record, ensure_ascii=False) + '\n')messagebox.showinfo("保存成功", "历史记录已保存到文件")# 主函数
if __name__ == "__main__":# 启动GUIroot = tk.Tk()app = XihuaChatbotGUI(root)root.mainloop()

主要修改点:
保存历史记录:在save_history方法中,将历史记录以指定的格式保存到文本文件中。每个记录占一行,格式为JSON字符串。
记录格式:根据用户是否标记回答为不准确,决定保存的具体答案。如果标记为不准确,保存百度百科的搜索结果;否则,保存模型生成的回答。
文件结构:
main.py:主程序文件,包含所有代码。
logs/:日志文件存储目录。
models/:模型权重文件存储目录。
data/:训练数据文件存储目录。
运行步骤:
确保安装了所有依赖库,如torch, transformers, requests, beautifulsoup4等。
将训练数据文件放在data/目录下。
运行main.py启动GUI。
这样,当用户在GUI中输入问题并标记回答为不正确时,程序会自动从百度百科中搜索相关信息并显示在GUI中,同时将这些信息保存到历史记录中,并以指定的格式保存到文本文件中。

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