一、前言

    早前的文章，我们都是通过输入命令的方式来使用Chatglm3-6b模型。现在，我们可以通过使用gradio，通过一个界面与模型进行交互。这样做可以减少重复加载模型和修改代码的麻烦，
让我们更方便地体验模型的效果。

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二、术语

2.1、Gradio

    是一个用于构建交互式界面的Python库。它使得在Python中创建快速原型、构建和共享机器学习模型变得更加容易。

    Gradio的主要功能是为机器学习模型提供一个即时的Web界面，使用户能够与模型进行交互，输入数据并查看结果，而无需编写复杂的前端代码。它提供了一个简单的API，可以将输入和输出绑定到模型的函数或方法，并自动生成用户界面。

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三、前置条件

3.1. windows or linux操作系统均可

3.2. 下载chatglm3-6b模型

从huggingface下载：https://huggingface.co/THUDM/chatglm3-6b/tree/main

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 3.3. 创建虚拟环境&安装依赖

conda create --name chatglm3 python=3.10
conda activate chatglm3
pip install protobuf transformers==4.39.3 cpm_kernels torch>=2.0 sentencepiece accelerate
pip install gradio

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四、技术实现

# -*-  coding = utf-8 -*-
import gradio as gr
import torch
from threading import Threadfrom transformers import (AutoModelForCausalLM,AutoTokenizer,StoppingCriteria,StoppingCriteriaList,TextIteratorStreamer
)modelPath = "/model/chatglm3-6b"def loadTokenizer():tokenizer = AutoTokenizer.from_pretrained(modelPath, use_fast=False, trust_remote_code=True)return tokenizerdef loadModel():model = AutoModelForCausalLM.from_pretrained(modelPath, device_map="auto",  trust_remote_code=True).cuda()model = model.eval()return modelclass StopOnTokens(StoppingCriteria):def __call__(self, input_ids: torch.LongTensor, scores: torch.FloatTensor, **kwargs) -> bool:stop_ids = [0, 2]for stop_id in stop_ids:if input_ids[0][-1] == stop_id:return Truereturn Falsedef parse_text(text):lines = text.split("\n")lines = [line for line in lines if line != ""]count = 0for i, line in enumerate(lines):if "```" in line:count += 1items = line.split('`')if count % 2 == 1:lines[i] = f'<pre><code class="language-{items[-1]}">'else:lines[i] = f'<br></code></pre>'else:if i > 0:if count % 2 == 1:line = line.replace("`", "\`")line = line.replace("<", "&lt;")line = line.replace(">", "&gt;")line = line.replace(" ", "&nbsp;")line = line.replace("*", "&ast;")line = line.replace("_", "&lowbar;")line = line.replace("-", "&#45;")line = line.replace(".", "&#46;")line = line.replace("!", "&#33;")line = line.replace("(", "&#40;")line = line.replace(")", "&#41;")line = line.replace("$", "&#36;")lines[i] = "<br>" + linetext = "".join(lines)return textdef predict(history, max_length, top_p, temperature):stop = StopOnTokens()messages = []for idx, (user_msg, model_msg) in enumerate(history):if idx == len(history) - 1 and not model_msg:messages.append({"role": "user", "content": user_msg})breakif user_msg:messages.append({"role": "user", "content": user_msg})if model_msg:messages.append({"role": "assistant", "content": model_msg})model_inputs = tokenizer.apply_chat_template(messages,add_generation_prompt=True,tokenize=True,return_tensors="pt").to(next(model.parameters()).device)streamer = TextIteratorStreamer(tokenizer, timeout=60, skip_prompt=True, skip_special_tokens=True)generate_kwargs = {"input_ids": model_inputs,"streamer": streamer,"max_new_tokens": max_length,"do_sample": True,"top_p": top_p,"temperature": temperature,"stopping_criteria": StoppingCriteriaList([stop]),"repetition_penalty": 1.2,}t = Thread(target=model.generate, kwargs=generate_kwargs)t.start()for new_token in streamer:if new_token != '':history[-1][1] += new_tokenyield historywith gr.Blocks() as demo:gr.HTML("""<h1 align="center">ChatGLM3-6B Gradio Simple Demo</h1>""")chatbot = gr.Chatbot()with gr.Row():with gr.Column(scale=4):with gr.Column(scale=12):user_input = gr.Textbox(show_label=False, placeholder="Input...", lines=10, container=False)with gr.Column(min_width=32, scale=1):submitBtn = gr.Button("Submit")with gr.Column(scale=1):emptyBtn = gr.Button("Clear History")max_length = gr.Slider(0, 32768, value=8192, step=1.0, label="Maximum length", interactive=True)top_p = gr.Slider(0, 1, value=0.8, step=0.01, label="Top P", interactive=True)temperature = gr.Slider(0.01, 1, value=0.6, step=0.01, label="Temperature", interactive=True)def user(query, history):return "", history + [[parse_text(query), ""]]submitBtn.click(user, [user_input, chatbot], [user_input, chatbot], queue=False).then(predict, [chatbot, max_length, top_p, temperature], chatbot)emptyBtn.click(lambda: None, None, chatbot, queue=False)if __name__ == '__main__':model = loadModel()tokenizer = loadTokenizer()demo.queue()demo.launch(server_name="0.0.0.0", server_port=8989, inbrowser=True, share=False)

调用结果：

启动成功：

GPU使用情况：

浏览器访问：

推理：

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五、附带说明

5.1. 问题：AttributeError: 'ChatGLMTokenizer' object has no attribute 'apply_chat_template'

1. transformers的版本太低，需要升级

pip install --upgrade transformers==4.39.3

5.2. 界面无法打开

1. 服务监听地址不能是127.0.0.1

2. 检查服务器的安全策略或防火墙配置

 服务端：lsof -i:8989 查看端口是否正常监听

 客户端：telnet ip 8989 查看是否可以正常连接