Update handler.py
Browse files- handler.py +77 -29
handler.py
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import torch
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from PIL import Image
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from transformers import MllamaForConditionalGeneration, AutoProcessor
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# Initialize the model and processor from the directory
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model_id = "meta-llama/Llama-3.2-90B-Vision-Instruct"
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self.model = MllamaForConditionalGeneration.from_pretrained(
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model_id,
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torch_dtype=torch.bfloat16,
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device_map="auto"
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self.processor = AutoProcessor.from_pretrained(model_id)
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messages = [
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{
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input_text = self.processor.apply_chat_template(messages, add_generation_prompt=True)
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#
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# handler.py
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import torch
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from transformers import MllamaForConditionalGeneration, AutoProcessor
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from PIL import Image
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import base64
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import io
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class Llama32VisionHandler:
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def __init__(self):
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self.model = None
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self.processor = None
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def initialize(self):
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# Cargar el modelo y el procesador
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model_id = "meta-llama/Llama-3.2-90B-Vision-Instruct"
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self.model = MllamaForConditionalGeneration.from_pretrained(
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model_id,
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torch_dtype=torch.bfloat16, # Usar bfloat16 para eficiencia de memoria
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device_map="auto", # Mapear automáticamente el modelo a los dispositivos disponibles
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)
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self.processor = AutoProcessor.from_pretrained(model_id)
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self.model.eval()
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def handle(self, request):
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# Asegurarse de que el modelo esté cargado
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if self.model is None:
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self.initialize()
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# Extraer imagen y texto de la solicitud
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image_data = request.get('image', None)
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text_input = request.get('text', '')
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# Procesar la imagen
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if image_data:
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# Si los datos de imagen están en formato base64
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if isinstance(image_data, str):
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image_bytes = base64.b64decode(image_data)
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image = Image.open(io.BytesIO(image_bytes))
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else:
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# Si los datos de imagen son bytes crudos
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image = Image.open(io.BytesIO(image_data))
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else:
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image = None # Manejar casos donde no se proporciona imagen
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# Preparar mensajes para el procesador
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messages = [
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{
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"role": "user",
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"content": [
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{"type": "image"},
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{"type": "text", "text": text_input}
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]
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}
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]
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# Aplicar la plantilla de chat a los mensajes
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input_text = self.processor.apply_chat_template(messages, add_generation_prompt=True)
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# Procesar las entradas
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inputs = self.processor(image, input_text, return_tensors="pt").to(self.model.device)
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# Generar salida
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with torch.no_grad():
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outputs = self.model.generate(**inputs, max_new_tokens=50)
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# Decodificar la salida
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response = self.processor.decode(outputs[0], skip_special_tokens=True)
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return response
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# Ejemplo de uso
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if __name__ == '__main__':
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handler = Llama32VisionHandler()
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# Cargar una imagen de ejemplo y codificarla en base64
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with open('ruta_a_tu_imagen.jpg', 'rb') as f:
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image_bytes = f.read()
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image_base64 = base64.b64encode(image_bytes).decode('utf-8')
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# Crear una solicitud de ejemplo
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request = {
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'image': image_base64,
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'text': 'Por favor, describe esta imagen en detalle.'
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}
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# Obtener la respuesta del handler
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response = handler.handle(request)
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print(response)
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#000
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