app.py

import streamlit as st
import pinecone
from sentence_transformers import SentenceTransformer

PINECONE_KEY = st.secrets["PINECONE_KEY"]  # app.pinecone.io

@st.experimental_singleton
def init_pinecone():
    pinecone.init(api_key=PINECONE_KEY, environment="us-west1-gcp")
    return pinecone.Index('youtube-search')
    
@st.experimental_singleton
def init_retriever():
    return SentenceTransformer("multi-qa-mpnet-base-dot-v1")

index = init_pinecone()
retriever = init_retriever()

def card(thubmnail, title, url, context):
    return st.markdown(f"""
    <div class="container-fluid">
        <div class="row align-items-start">
            <div class="col-md-4 col-sm-4">
                 <div class="position-relative">
                     <a href={url}><img src={thubmnail} class="img-fluid" style="width: 192px; height: 106px"></a>
                 </div>
             </div>
             <div  class="col-md-8 col-sm-8">
                 <a href={url}>{title}</a>
                 <br>
                 <span style="color: #808080;">
                     <small>{context[:200].capitalize()+"...."}</small>
                 </span>
             </div>
        </div>
     </div>
        """, unsafe_allow_html=True)

    
st.write("""
# YouTube Q&A
Ask me a question!
""")

st.markdown("""
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
""", unsafe_allow_html=True)

query = st.text_input("Search!", "")

if query != "":
    xq = retriever.encode([query]).tolist()
    xc = index.query(xq, top_k=5, include_metadata=True)
    
    for context in xc['matches']:
        card(
            f"https://img.youtube.com/vi/{context['metadata']['url'].split('/')[-1]}/maxresdefault.jpg",
            context['metadata']['title'],
            f"{context['metadata']['url']}?t={int(context['metadata']['start'])}",
            context['metadata']['text']
        )