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from typing import Dict, Any |
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import logging |
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from transformers import AutoModelForCausalLM, AutoTokenizer |
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from peft import PeftConfig, PeftModel |
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import torch.cuda |
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LOGGER = logging.getLogger(__name__) |
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logging.basicConfig(level=logging.INFO) |
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device = "cuda" if torch.cuda.is_available() else "cpu" |
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class EndpointHandler(): |
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def __init__(self, path=""): |
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config = PeftConfig.from_pretrained(path) |
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model = AutoModelForCausalLM.from_pretrained(config.base_model_name_or_path, load_in_8bit=True, device_map='auto') |
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self.tokenizer = AutoTokenizer.from_pretrained(config.base_model_name_or_path) |
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self.model = PeftModel.from_pretrained(model, path) |
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def __call__(self, data: Dict[str, Any]) -> Dict[str, Any]: |
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""" |
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Args: |
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data (Dict): The payload with the text prompt and generation parameters. |
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""" |
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LOGGER.info(f"Received data: {data}") |
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prompt = data.pop("inputs", None) |
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parameters = data.pop("parameters", None) |
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if prompt is None: |
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raise ValueError("Missing prompt.") |
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input_ids = self.tokenizer(prompt, return_tensors="pt").input_ids.to(device) |
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LOGGER.info(f"Start generation.") |
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if parameters is not None: |
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output = self.model.generate(input_ids=input_ids, **parameters) |
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else: |
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output = self.model.generate(input_ids=input_ids) |
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prediction = self.tokenizer.decode(output[0]) |
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LOGGER.info(f"Generated text: {prediction}") |
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return {"generated_text": prediction} |
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