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Delete app.py
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app.py
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import os
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import gradio as gr
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import torch
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from transformers import AutoModelForCausalLM, AutoTokenizer
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from peft import PeftModel
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print("=== Application Starting (LoRA Mode) ===")
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try:
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# 1. 設定 Base Model (基礎模型)
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# 這是您微調時使用的原始模型
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BASE_MODEL_ID = "QLU-NLP/BianCang-Qwen2.5-7B"
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# 2. 自動偵測 Adapter (微調權重) 路徑
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# 這是您上傳的資料夾
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if os.path.exists("BianCang-Qwen2.5-7B-Instruct_finetuned_model_1"):
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ADAPTER_PATH = "BianCang-Qwen2.5-7B-Instruct_finetuned_model_1"
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else:
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ADAPTER_PATH = "."
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print(f"Base Model: {BASE_MODEL_ID}")
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print(f"Adapter Path: {ADAPTER_PATH}")
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# 3. 載入 Tokenizer (通常使用 Base Model 的)
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print("Loading Tokenizer...")
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tokenizer = AutoTokenizer.from_pretrained(BASE_MODEL_ID, trust_remote_code=True)
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# 4. 載入 Base Model
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print("Loading Base Model...")
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try:
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base_model = AutoModelForCausalLM.from_pretrained(
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BASE_MODEL_ID,
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device_map="auto",
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torch_dtype=torch.float16,
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trust_remote_code=True
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)
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except Exception as e:
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print(f"GPU load failed: {e}. Fallback to CPU.")
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base_model = AutoModelForCausalLM.from_pretrained(
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BASE_MODEL_ID,
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device_map="cpu",
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trust_remote_code=True
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)
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# 5. 掛載 LoRA Adapter
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print("Loading LoRA Adapter...")
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try:
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model = PeftModel.from_pretrained(base_model, ADAPTER_PATH)
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print("LoRA Adapter loaded successfully!")
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except Exception as e:
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print(f"Failed to load adapter: {e}")
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print("Running with Base Model only as fallback.")
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model = base_model
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def predict(message, history):
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# 構建 Prompt (根據 Qwen 的格式)
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# 注意:如果您的微調模型有特殊的 Prompt Template,請在此修改
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system_prompt = "你是一個專業的中醫藥材知識助手。你具備深厚的中醫理論基礎,特別擅長中藥材的性味、歸經、功效與主治。"
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messages = [
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{"role": "system", "content": system_prompt}
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]
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for human, assistant in history:
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messages.append({"role": "user", "content": human})
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messages.append({"role": "assistant", "content": assistant})
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messages.append({"role": "user", "content": message})
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text = tokenizer.apply_chat_template(
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messages,
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tokenize=False,
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add_generation_prompt=True
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)
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model_inputs = tokenizer([text], return_tensors="pt").to(model.device)
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generated_ids = model.generate(
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model_inputs.input_ids,
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max_new_tokens=512,
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temperature=0.7,
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top_p=0.9,
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do_sample=True
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)
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generated_ids = [
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output_ids[len(input_ids):] for input_ids, output_ids in zip(model_inputs.input_ids, generated_ids)
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]
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response = tokenizer.batch_decode(generated_ids, skip_special_tokens=True)[0]
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return response
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# 建立 Gradio 介面 (這會自動產生 API)
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demo = gr.ChatInterface(
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fn=predict,
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title="BianCang-Qwen2.5-7B TCM Chatbot",
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description="中醫藥材知識微調模型"
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)
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if __name__ == "__main__":
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demo.launch(server_name="0.0.0.0", server_port=7860, show_api=True)
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except Exception as e:
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print(f"!!! CRITICAL ERROR ===\n{e}\n======================")
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raise e
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