Update app.py

app.py

@@ -4,7 +4,8 @@ import gradio as gr
 from langchain.embeddings import CohereEmbeddings
 from langchain.document_loaders import UnstructuredFileLoader
 from langchain.vectorstores import Weaviate
-from langchain.chain_types import OpenAI, RetrievalQA
+from langchain.llms import OpenAI
+from langchain.chains import RetrievalQA
 import os
 import urllib.request
 import ssl
@@ -25,7 +26,7 @@ client = weaviate.Client(url=weaviate_url, auth_client_secret=auth_config,
                          additional_headers={"X-Cohere-Api-Key": cohere_api_key})
 
 # Initialize vectorstore
-vectorstore = Weaviate(client, index_name="Articles", text_key="text")
+vectorstore = Weaviate(client, index_name="HereChat", text_key="text")
 vectorstore._query_attrs = ["text", "title", "url", "views", "lang", "_additional {distance}"]
 vectorstore.embedding = CohereEmbeddings(model="embed-multilingual-v2.0", cohere_api_key=cohere_api_key)