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Update app.py
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app.py
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import streamlit as st
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from transformers import AutoTokenizer, AutoModelForCausalLM
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import torch
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if
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"Nombre GPU": torch.cuda.get_device_name(0),
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"Memoria Total (GB)": round(torch.cuda.get_device_properties(0).total_memory/1e9, 2),
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"CUDA Version": torch.version.cuda
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}
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return gpu_info
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return {"GPU Disponible": False}
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# Configurar autenticación
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def setup_auth():
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if 'HUGGINGFACE_TOKEN' in st.secrets:
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login(st.secrets['HUGGINGFACE_TOKEN'])
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return True
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else:
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st.error("No se encontró el token de
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st.stop()
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return False
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class
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def __init__(self):
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self._model = None
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self._tokenizer = None
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@property
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def model(self):
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if self._model is None:
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self.
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return self._model
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@property
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def tokenizer(self):
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if self._tokenizer is None:
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self.
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return self._tokenizer
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def generate_response(self, prompt: str, max_new_tokens: int = 512) -> str:
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inputs = self.tokenizer(formatted_prompt, return_tensors="pt").to(self.model.device)
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@@ -62,77 +70,81 @@ class LlamaDemo:
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num_return_sequences=1,
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temperature=0.7,
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do_sample=True,
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top_p=0.9
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pad_token_id=self.tokenizer.eos_token_id
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)
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response = self.tokenizer.decode(outputs[0], skip_special_tokens=True)
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def main():
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st.set_page_config(
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page_title="Llama 2 Chat Demo",
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page_icon="🦙",
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layout="wide"
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)
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st.title("🦙 Llama 2 Chat
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#
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st.write(
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#
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if 'llama' not in st.session_state:
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with st.spinner("
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# Chat interface
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with st.container():
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for message in st.session_state.chat_history:
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with st.chat_message(message["role"]):
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st.write(message["content"])
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})
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with st.chat_message("user"):
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st.write(prompt)
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with st.chat_message("assistant"):
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with st.spinner("Thinking..."):
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try:
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response = st.session_state.llama.generate_response(prompt)
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st.write(response)
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st.session_state.chat_history.append({
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"role": "assistant",
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"content": response
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})
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except Exception as e:
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st.error(f"Error: {str(e)}")
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with st.sidebar:
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st.markdown("""
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###
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""")
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if st.button("
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st.session_state.
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st.experimental_rerun()
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if __name__ == "__main__":
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import streamlit as st
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from transformers import AutoTokenizer, AutoModelForCausalLM
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import torch
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from huggingface_hub import login
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import os
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def setup_llama3_auth():
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"""Configurar autenticación para Llama 3"""
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if 'HUGGING_FACE_TOKEN_3' in st.secrets:
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token = st.secrets['HUGGING_FACE_TOKEN_3']
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login(token)
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return True
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else:
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st.error("No se encontró el token de Llama 3 en los secrets")
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st.stop()
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return False
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class Llama3Demo:
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def __init__(self):
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# Verificar autenticación antes de cargar el modelo
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setup_llama3_auth()
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# Usando el modelo de 3B con instrucciones
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self.model_name = "meta-llama/Llama-3.2-3B-Instruct"
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self._model = None
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self._tokenizer = None
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@property
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def model(self):
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if self._model is None:
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try:
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self._model = AutoModelForCausalLM.from_pretrained(
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self.model_name,
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torch_dtype=torch.float16,
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device_map="auto",
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load_in_8bit=True, # Optimización de memoria
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use_auth_token=st.secrets['HUGGING_FACE_TOKEN_3']
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)
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except Exception as e:
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st.error(f"Error cargando el modelo: {str(e)}")
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st.error("Verifica tu acceso a Llama 3.2 en https://huggingface.co/meta-llama")
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raise e
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return self._model
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@property
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def tokenizer(self):
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if self._tokenizer is None:
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try:
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self._tokenizer = AutoTokenizer.from_pretrained(
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self.model_name,
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use_auth_token=st.secrets['HUGGING_FACE_TOKEN_3']
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)
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except Exception as e:
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st.error(f"Error cargando el tokenizer: {str(e)}")
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raise e
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return self._tokenizer
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def generate_response(self, prompt: str, max_new_tokens: int = 512) -> str:
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# Formato específico para Llama 3.2
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formatted_prompt = f"""<|system|>You are a helpful AI assistant.</s>
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<|user|>{prompt}</s>
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<|assistant|>"""
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inputs = self.tokenizer(formatted_prompt, return_tensors="pt").to(self.model.device)
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num_return_sequences=1,
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temperature=0.7,
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do_sample=True,
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top_p=0.9
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)
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# Limpiar memoria GPU
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torch.cuda.empty_cache()
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response = self.tokenizer.decode(outputs[0], skip_special_tokens=True)
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# Extraer solo la respuesta del asistente
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return response.split("<|assistant|>")[-1].strip()
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def main():
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st.set_page_config(page_title="Llama 3.2 Chat", page_icon="🦙")
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st.title("🦙 Llama 3.2 Chat")
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# Verificar configuración
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with st.expander("🔧 Status", expanded=True):
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try:
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token_status = setup_llama3_auth()
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st.write("Token Llama 3:", "✅" if token_status else "❌")
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if torch.cuda.is_available():
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st.write("GPU:", torch.cuda.get_device_name(0))
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st.write("Memoria GPU:", f"{torch.cuda.get_device_properties(0).total_memory/1e9:.1f} GB")
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else:
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st.warning("GPU no disponible")
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except Exception as e:
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st.error(f"Error en configuración: {str(e)}")
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# Inicializar el modelo
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if 'llama' not in st.session_state:
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with st.spinner("Inicializando Llama 3.2... esto puede tomar unos minutos..."):
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try:
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st.session_state.llama = Llama3Demo()
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except Exception as e:
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st.error("Error inicializando el modelo")
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st.stop()
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# Gestión del historial de chat
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if 'messages' not in st.session_state:
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st.session_state.messages = []
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# Mostrar historial
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for message in st.session_state.messages:
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with st.chat_message(message["role"]):
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st.markdown(message["content"])
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# Interface de chat
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if prompt := st.chat_input("Escribe tu mensaje aquí"):
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st.session_state.messages.append({"role": "user", "content": prompt})
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with st.chat_message("user"):
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st.markdown(prompt)
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with st.chat_message("assistant"):
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try:
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response = st.session_state.llama.generate_response(prompt)
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st.markdown(response)
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st.session_state.messages.append({"role": "assistant", "content": response})
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except Exception as e:
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st.error(f"Error generando respuesta: {str(e)}")
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# Sidebar con información y controles
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with st.sidebar:
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st.markdown("""
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### Acerca de
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Este demo usa Llama 3.2-3B-Instruct, el nuevo modelo de Meta.
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### Características
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- Modelo de 3B parámetros
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- Optimizado para diálogo
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- Cuantización de 8-bits
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""")
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if st.button("Limpiar Chat"):
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st.session_state.messages = []
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st.experimental_rerun()
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if __name__ == "__main__":
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