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| import streamlit as st | |
| from huggingface_hub import InferenceClient | |
| from dotenv import load_dotenv | |
| import os | |
| import json | |
| import time | |
| import requests | |
| t = "12345hf_IsAVwGwHDKzSCQJPgIPOhhVbkSfAqfkUib" | |
| client = InferenceClient(api_key=t[5:]) | |
| # 预设提示词文件路径 | |
| PROMPTS_FILE = "custom_prompts.json" | |
| # 加载预设提示词 | |
| def load_prompts(): | |
| if os.path.exists(PROMPTS_FILE): | |
| with open(PROMPTS_FILE, 'r', encoding='utf-8') as f: | |
| return json.load(f) | |
| return { | |
| "翻译助手": "翻译助手,给你中文你翻译成英文,给你英文你翻译成中文。直接翻译,不要解释。", | |
| "代码解释器": "你是一个代码解释器。请解释用户提供的代码,并在需要时提供改进建议。", | |
| "创意写作": "你是一个创意写作助手。根据用户提供的主题或开头,继续创作故事或文章。", | |
| "数学导师": "你是一个数学导师。帮助用户解决数学问题,并解释解题步骤。", | |
| "历史学家": "你是一个历史学家。回答用户关于历史事、人物和时期的问题,提供详细和准确的信息。" | |
| } | |
| # 保存预设提示词 | |
| def save_prompts(prompts): | |
| with open(PROMPTS_FILE, 'w', encoding='utf-8') as f: | |
| json.dump(prompts, f, ensure_ascii=False, indent=2) | |
| # 初始化会话状态 | |
| if 'messages' not in st.session_state: | |
| st.session_state.messages = [] | |
| if 'custom_prompts' not in st.session_state: | |
| st.session_state.custom_prompts = load_prompts() | |
| # 设置页面标题 | |
| st.title("AI 助手") | |
| # 创建侧边栏用于参数调整 | |
| st.sidebar.header("参数设置") | |
| # 模型选择 | |
| models = [ | |
| "Qwen/Qwen2.5-72B-Instruct", | |
| ] | |
| selected_model = st.sidebar.selectbox("选择模型", models) | |
| temperature = st.sidebar.slider("Temperature", 0.0, 1.0, 0.7, 0.1) | |
| max_tokens = st.sidebar.slider("Max Tokens", 100, 32768, 8196, 100) | |
| top_p = st.sidebar.slider("Top P", 0.1, 1.0, 0.9, 0.1) | |
| # 提示词选择 | |
| selected_prompt = st.sidebar.selectbox("选择系统提示", list(st.session_state.custom_prompts.keys()) + ["自定义"]) | |
| if selected_prompt == "自定义": | |
| system_prompt = st.sidebar.text_area("输入自定义系统提示", "") | |
| else: | |
| system_prompt = st.session_state.custom_prompts[selected_prompt] | |
| # 如果提示词改变,重置对话 | |
| if 'current_prompt' not in st.session_state or st.session_state.current_prompt != system_prompt: | |
| st.session_state.messages = [{"role": "system", "content": system_prompt}] | |
| st.session_state.current_prompt = system_prompt | |
| # 显示对话历史 | |
| for message in st.session_state.messages[1:]: # 跳过系统消息 | |
| with st.chat_message(message["role"]): | |
| if message["role"] == "assistant": | |
| st.code(message["content"], language="markdown") | |
| else: | |
| st.write(message["content"]) | |
| # 获取用户输入 | |
| user_input = st.chat_input("请输入你的问题:") | |
| if user_input: | |
| # 添加用户消息到历史 | |
| st.session_state.messages.append({"role": "user", "content": user_input}) | |
| with st.chat_message("user"): | |
| st.write(user_input) | |
| # 创建助手消息占位符 | |
| with st.chat_message("assistant"): | |
| message_placeholder = st.empty() | |
| full_response = "" | |
| max_retries = 3 | |
| retry_delay = 2 | |
| for attempt in range(max_retries): | |
| try: | |
| # 发送请求到模型 | |
| for chunk in client.chat.completions.create( | |
| model=selected_model, | |
| messages=st.session_state.messages, | |
| stream=True, | |
| temperature=temperature, | |
| max_tokens=max_tokens, | |
| top_p=top_p | |
| ): | |
| content = chunk.choices[0].delta.content | |
| if content: | |
| full_response += content | |
| message_placeholder.markdown(full_response + "▌") | |
| break # 如果成功,跳出重试循环 | |
| except (requests.exceptions.RequestException, ConnectionError) as e: | |
| if attempt < max_retries - 1: | |
| st.warning(f"连接错误,正在重试... ({attempt + 1}/{max_retries})") | |
| time.sleep(retry_delay) | |
| else: | |
| st.error(f"连接失败,请稍后再试。错误信息:{str(e)}") | |
| full_response = "抱歉,我现在无法回答。请稍后再试。" | |
| message_placeholder.markdown(full_response) | |
| # 将助手的回复添加到消息历史 | |
| st.session_state.messages.append({"role": "assistant", "content": full_response}) | |
| # 在对话历史下方添加一个可复制的代码块 | |
| st.code(full_response, language="markdown") | |
| # 添加清除对话按钮 | |
| if st.button("清除对话"): | |
| st.session_state.messages = [{"role": "system", "content": system_prompt}] | |
| st.rerun() # 使用 st.rerun() 替代 st.experimental_rerun() | |
| # 系统提示管理(放在左侧最下面) | |
| st.sidebar.markdown("---") | |
| st.sidebar.subheader("系统提示管理") | |
| new_prompt_name = st.sidebar.text_input("新系统提示名称") | |
| new_prompt_content = st.sidebar.text_area("新系统提示内容") | |
| if st.sidebar.button("添加新系统提示"): | |
| if new_prompt_name and new_prompt_content: | |
| st.session_state.custom_prompts[new_prompt_name] = new_prompt_content | |
| save_prompts(st.session_state.custom_prompts) | |
| st.sidebar.success(f"已添加新系统提示:{new_prompt_name}") | |
| # 删除系统提示 | |
| prompt_to_delete = st.sidebar.selectbox("选择要删除的系统提示", list(st.session_state.custom_prompts.keys())) | |
| if st.sidebar.button("删除选中的系统提示"): | |
| if prompt_to_delete in st.session_state.custom_prompts: | |
| del st.session_state.custom_prompts[prompt_to_delete] | |
| save_prompts(st.session_state.custom_prompts) | |
| st.sidebar.success(f"已删除系统提示:{prompt_to_delete}") |