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以下のコードで推論できます。 |
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# QLoRA config |
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bnb_config = BitsAndBytesConfig( |
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load_in_4bit=True, |
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bnb_4bit_quant_type="nf4", |
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bnb_4bit_compute_dtype=torch.bfloat16, |
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) |
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# Load model |
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model = AutoModelForCausalLM.from_pretrained( |
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base_model_id, |
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quantization_config=bnb_config, |
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device_map="auto", |
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token = HF_TOKEN |
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) |
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# Load tokenizer |
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tokenizer = AutoTokenizer.from_pretrained(base_model_id, trust_remote_code=True, token = HF_TOKEN) |
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# 元のモデルにLoRAのアダプタを統合。 |
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model = PeftModel.from_pretrained(model, adapter_id, token = HF_TOKEN) |
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# データセットの読み込み。 |
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# omnicampusの開発環境では、左にタスクのjsonlをドラッグアンドドロップしてから実行。 |
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datasets = [] |
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with open(dataset_file_path, "r") as f: |
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item = "" |
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for line in f: |
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line = line.strip() |
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item += line |
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if item.endswith("}"): |
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datasets.append(json.loads(item)) |
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item = "" |
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# llmjp |
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results = [] |
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for data in tqdm(datasets): |
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input = data["input"] |
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prompt = f"""### 指示 |
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{input} |
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### 回答 |
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""" |
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tokenized_input = tokenizer.encode(prompt, add_special_tokens=False, return_tensors="pt").to("cuda") |
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attention_mask = torch.ones_like(tokenized_input) |
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with torch.no_grad(): |
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outputs = model.generate( |
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tokenized_input, |
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attention_mask=attention_mask, |
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max_new_tokens=100, |
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do_sample=False, |
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repetition_penalty=1.2, |
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pad_token_id=tokenizer.eos_token_id |
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)[0] |
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output = tokenizer.decode(outputs[tokenized_input.size(1):], skip_special_tokens=True) |
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# output = tokenizer.decode(outputs[0][tokenized_input.size(1):], skip_special_tokens=True) |
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results.append({"task_id": data["task_id"], "input": input, "output": output}) |
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