Update app.py

app.py

@@ -12,6 +12,9 @@ from pinecone import ServerlessSpec
 
 from llama_index.vector_stores import PineconeVectorStore
 
+from llama_index import VectorStoreIndex
+from llama_index.retrievers import VectorIndexRetriever
+
 # Set OpenAI API key from Streamlit secrets
 pinecone_api_key = os.getenv("PINECONE_API_KEY") 
 openai_api_key = os.getenv("OPENAI_API_KEY")
@@ -32,6 +35,7 @@ vector_store = PineconeVectorStore(pinecone_index=pinecone_index)
 
 pinecone_index.describe_index_stats()
 
+
 # Initialize vector index and retriever
 vector_index = VectorStoreIndex.from_vector_store(vector_store=vector_store)
 retriever = VectorIndexRetriever(index=vector_index, similarity_top_k=5)