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from llama_index import Prompt, SimpleDirectoryReader, LLMPredictor, PromptHelper, StorageContext, ServiceContext, GPTVectorStoreIndex, load_index_from_storage
from langchain.chat_models import ChatOpenAI
from langchain.prompts import ChatPromptTemplate
from langchain.prompts import HumanMessagePromptTemplate
from langchain.schema.messages import SystemMessage
import gradio as gr
import sys
import os
os.environ["OPENAI_API_KEY"]
def construct_index(directory_path):
# setup parameters
max_input_size = 4096
num_outputs = 512
max_chunk_overlap = 0.2
chunk_size_limit = 600
# create a prompt helper
prompt_helper = PromptHelper(max_input_size, num_outputs, max_chunk_overlap, chunk_size_limit=chunk_size_limit)
# initialize the predictor with a fine-tuned model
llm_predictor = LLMPredictor(llm=ChatOpenAI(temperature=0.9, model_name="gpt-4", max_tokens=num_outputs))
# load documents from the specified directory
documents = SimpleDirectoryReader(directory_path).load_data()
# construct the index
index = GPTVectorStoreIndex(documents, llm_predictor=llm_predictor, prompt_helper=prompt_helper)
# save the index to disk
index.storage_context.persist(persist_dir="index.json")
return index
def chatbot(input_text):
# load the index from disk
query_engine = index.as_query_engine()
# define custom Prompt
chat_template = ChatPromptTemplate.from_messages(
[
SystemMessage(
content=(
"Quiero que actues como un asistente personal de un cliente del Banco Galicia. Tu nombre es Gala. Me brindas información sobre mi resument de tarjeta de credito VISA. Si la respuesta no esta en el documento, respondeme de forma creativa que no lo sabes, pero que podes ayudarme con otra pregunta. Nunca te enojes y no contestes preguntas politicas o religiosas. Dado esto, por favor responde a todas las preguntas."
)
),
HumanMessagePromptTemplate.from_template("{inpu_text}"),
])
response = query_engine.query(chat_template)
return response.response
iface = gr.Interface(fn=chatbot,
inputs=gr.components.Textbox(lines=7, label="Ingresa tu pregunta"),
outputs="text",
title="Demo Galicia")
# construct the index
index = construct_index("docs")
iface.launch(share=True, debug=True) |