app.py

import gradio as gr
from langchain.embeddings import OpenAIEmbeddings
from langchain.vectorstores import FAISS
import os

os.environ["OPENAI_API_KEY"] = os.environ["openai"]
embeddings = OpenAIEmbeddings(model="text-embedding-3-large")

# Load the vector store
vector_store = FAISS.load_local(
    "yc_index", embeddings, allow_dangerous_deserialization=True
)

# Create a retriever with the vector store
retriever = vector_store.as_retriever(search_type="mmr")

# Function to use the retriever on an input query
def retrieve_result(query, k=10):
    retriever.search_kwargs["k"] = k
    result = retriever.invoke(query)
    res = []
    for r in result:
        formatted_result = f"""
        <b>Name</b>: {r.metadata.get('name')}<br>
        <b>One Liner</b>: {r.metadata.get('oneLiner')}<br>
        <b>Website</b>: <a href='{r.metadata.get('website')}' target='_blank'>{r.metadata.get('website')}</a><br>
        <b>Status</b>: {r.metadata.get('status')}<br>
        <b>Locations</b>: {r.metadata.get('locations')}
        """
        res.append(formatted_result.strip())
    return "<br><br>".join(res)

# Set up the Gradio UI using Blocks
with gr.Blocks() as demo:
    gr.Markdown("# YCombinator Startups Semantic Search")
    #gr.Markdown("Enter a query to search the vector store for relevant results about legal tech startups.")
    with gr.Row():
        input_text = gr.Textbox(label="Describe your startup idea")
    k_value = gr.Number(label="Top K startups", value=5)
    submit_button = gr.Button("Submit")
    with gr.Row():
        output_text = gr.HTML(label="Result")

    submit_button.click(fn=lambda query, k: '', inputs=[input_text, k_value], outputs=output_text)
    submit_button.click(fn=retrieve_result, inputs=[input_text, k_value], outputs=output_text)   

demo.launch()