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Dan Foley
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Delete new_streamlit.py
Browse files- new_streamlit.py +0 -188
new_streamlit.py
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import streamlit as st
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import os
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from typing import List, Tuple, Optional
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from pinecone import Pinecone
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from langchain_pinecone import PineconeVectorStore
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from langchain_huggingface import HuggingFaceEmbeddings
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from langchain_openai import ChatOpenAI
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from langchain_core.prompts import PromptTemplate
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from dotenv import load_dotenv
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from RAG import RAG
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from bpl_scraper import DigitalCommonwealthScraper
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import logging
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import json
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import shutil
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from PIL import Image
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import io
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# Configure logging
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logging.basicConfig(level=logging.INFO)
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logger = logging.getLogger(__name__)
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# Page configuration
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st.set_page_config(
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page_title="Boston Public Library Chatbot",
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page_icon="🤖",
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layout="wide"
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)
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def initialize_models() -> Tuple[Optional[ChatOpenAI], HuggingFaceEmbeddings]:
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"""Initialize the language model and embeddings."""
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try:
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load_dotenv()
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# Initialize OpenAI model
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llm = ChatOpenAI(
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model="gpt-4", # Changed from gpt-4o-mini which appears to be a typo
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temperature=0,
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timeout=60, # Added reasonable timeout
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max_retries=2
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)
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# Initialize embeddings
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embeddings = HuggingFaceEmbeddings(
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model_name="sentence-transformers/all-MiniLM-L6-v2"
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)
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return llm, embeddings
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except Exception as e:
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logger.error(f"Error initializing models: {str(e)}")
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st.error(f"Failed to initialize models: {str(e)}")
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return None, None
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def process_message(
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query: str,
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llm: ChatOpenAI,
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index_name: str,
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embeddings: HuggingFaceEmbeddings
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) -> Tuple[str, List]:
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"""Process the user message using the RAG system."""
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try:
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response, sources = RAG(
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query=query,
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llm=llm,
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index_name=index_name,
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embeddings=embeddings
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)
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return response, sources
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except Exception as e:
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logger.error(f"Error in process_message: {str(e)}")
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return f"Error processing message: {str(e)}", []
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def display_sources(sources: List) -> None:
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"""Display sources in expandable sections with proper formatting."""
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if not sources:
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st.info("No sources available for this response.")
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return
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st.subheader("Sources")
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for i, doc in enumerate(sources, 1):
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try:
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with st.expander(f"Source {i}"):
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if hasattr(doc, 'page_content'):
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st.markdown(f"**Content:** {doc.page_content[0:100] + ' ...'}")
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if hasattr(doc, 'metadata'):
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for key, value in doc.metadata.items():
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st.markdown(f"**{key.title()}:** {value}")
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# Web Scraper to display images of sources
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# Especially helpful if the sources are images themselves
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# or are OCR'd text files
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scraper = DigitalCommonwealthScraper()
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images = scraper.extract_images(doc.metadata["URL"])
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images = images[:1]
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# If there are no images then don't display them
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if not images:
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st.warning("No images found on the page.")
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return
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# Download the images
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# Delete the directory if it already exists
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# to clear the existing cache of images for each listed source
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output_dir = 'downloaded_images'
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if os.path.exists(output_dir):
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shutil.rmtree(output_dir)
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# Download the main image to a local directory
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downloaded_files = scraper.download_images(images)
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# Display the image using st.image
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# Display the title of the image using img.get
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st.image(downloaded_files, width=400, caption=[
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img.get('alt', f'Image {i+1}') for i, img in enumerate(images)
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])
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else:
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st.markdown(f"**Content:** {str(doc)}")
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except Exception as e:
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logger.error(f"Error displaying source {i}: {str(e)}")
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st.error(f"Error displaying source {i}")
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def main():
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st.title("Boston Public Library RAG Chatbot")
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# Initialize session state
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if "messages" not in st.session_state:
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st.session_state.messages = []
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# Initialize models
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llm, embeddings = initialize_models()
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if not llm or not embeddings:
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st.error("Failed to initialize the application. Please check the logs.")
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return
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# Constants
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INDEX_NAME = 'bpl-rag'
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# Display chat history
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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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# Chat input
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user_input = st.chat_input("Type your message here...")
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if user_input:
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# Display user message
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with st.chat_message("user"):
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st.markdown(user_input)
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st.session_state.messages.append({"role": "user", "content": user_input})
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# Process and display assistant response
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with st.chat_message("assistant"):
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with st.spinner("Thinking..."):
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response, sources = process_message(
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query=user_input,
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llm=llm,
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index_name=INDEX_NAME,
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embeddings=embeddings
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)
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if isinstance(response, str):
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st.markdown(response)
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st.session_state.messages.append({
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"role": "assistant",
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"content": response
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})
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# Display sources
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display_sources(sources)
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else:
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st.error("Received an invalid response format")
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# Footer
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st.markdown("---")
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st.markdown(
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"Built with ❤️ using Streamlit + LangChain + OpenAI",
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help="An AI-powered chatbot with RAG capabilities"
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)
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if __name__ == "__main__":
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main()
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