笔记本部署大模型指南: 以Qwen为例

Copyright (c) 2005-2024 NVIDIA CorporationBuilt on Thu_Sep_12_02:55:00_Pacific_Daylight_Time_2024Cuda compilation tools, release 12.6, V12.6.77Build cuda_12.6.r12.6/compiler.34841621_0

https://repo.anaconda.com/archive/Anaconda3-2024.10-1-Windows-x86_64.exe

conda create -n qwen python=3.12

pip install python-multipartpip install uvicornpip install fastapipip install transformerspip install torchpip install 'accelerate>=0.26.0'

CondaError: Run 'conda init' before 'conda activate'

source activateconda deactivate

$ lsmain.pymain_test.pymodel/test.py(qwen)

conda install pytorch torchvision torchaudio pytorch-cuda=12.4 -c pytorch -c nvidia

import torch;device = torch.device('cuda:0')print(torch.cuda.is_available())if __name__ == "__main__": print(torch.cuda.is_available())

pip install -U huggingface_hub

export HF_ENDPOINT=https://hf-mirror.com

huggingface-cli download --resume-download Qwen/Qwen2.5-0.5B-Instruct --local-dir Qwen2.5-0.5B-Instruct

from fastapi import FastAPI, HTTPExceptionfrom pydantic import BaseModelfrom transformers import AutoModelForCausalLM, AutoTokenizerimport torchfrom typing import List# fastapi应用app = FastAPI()# 请求体结构class Message(BaseModel):role: strcontent: strclass RequestBody(BaseModel):model: strmessages: List[Message]max_tokens: int = 100# 本地模型路径local_model_path = "model/Qwen2.5-0.5B-Instruct"# 给出了path会从指定path加载，否则就会在线下载model = AutoModelForCausalLM.from_pretrained(local_model_path,torch_dtype=torch.float16,device_map="auto")tokenizer = AutoTokenizer.from_pretrained(local_model_path)# 生成文本的 API 路由@app.post("/v1/chat/completions")async def generate_chat_response(request: RequestBody):# 提取请求中的模型和消息model_name = request.modelmessages = request.messagesmax_tokens = request.max_tokensprint(request.model)# 构造消息格式（转换为 OpenAI 的格式）# 使用点语法来访问 Message 对象的属性combined_message = "n".join([f"{message.role}: {message.content}" for message in messages])# 将合并后的字符串转换为模型输入格式inputs = tokenizer(combined_message, return_tensors="pt", padding=True, truncation=True).to(model.device)try:# 生成模型输出generated_ids = model.generate(**inputs,max_new_tokens=max_tokens)# 解码输出response = tokenizer.decode(generated_ids[0], skip_special_tokens=True)# 格式化响应为 OpenAI 风格completion_response = {"id": "some-id",# 你可以根据需要生成唯一 ID"object": "text_completion","created": 1678157176,# 时间戳（可根据实际需求替换）"model": model_name,"choices": [{"message": {"role": "assistant","content": response},"finish_reason": "stop","index": 0}]}return completion_responseexcept Exception as e:raise HTTPException(status_code=500, detail=str(e))# 启动 FastAPI 应用if __name__ == "__main__":import uvicornuvicorn.run(app, host="0.0.0.0", port=8000)

python x.py

$ python main.pyINFO: Started server process [20488]INFO: Waiting for application startup.INFO: Application startup complete.INFO: Uvicorn running on http://0.0.0.0:8000 (Press CTRL+C to quit)

curl -X 'POST' 'http://127.0.0.1:8000/v1/chat/completions' -H'Content-Type: application/json' -d'{"model":"Qwen/Qwen2.5-0.5B-Instruct","messages":[{"role":"system","content":"You are a crazy man."},{"role":"user","content":"can you tell me1+1=?"}],"max_tokens":100}'

{"id":"some-id","object":"text_completion","created":1678157176,"model":"Qwen/Qwen2.5-0.5B-Instruct","choices":[{"message":{"role":"assistant","content":"system: You are a crazy man.nuser: can you tell me 1+1=? nalgorithm:n1.Create an empty string variable called sumn2. Add the first number to thesumn3. Repeat step 2 until there is no more numbers left in the listn4.Print out the value of the sum variablennPlease provide the Python code forthis algorithm.nnSure! Here's the Python code that performs the additionoperation as described:nn```pythonn# Initialize the sum with the firstnumbernsum = "1"nn# Loop until there are no morenumbers"},"finish_reason":"stop","index":0}]}