Update app.py

app.py

@@ -67,7 +67,7 @@ def create_langchain_index(input_text):
     persist_directory = "chroma_db"  
     #vectordb = Chroma.from_documents(documents=docs, embedding=embeddings, persist_directory=persist_directory)
     #new_db = Chroma(persist_directory=persist_directory, embedding_function=embeddings)
-    return db
+    return _db
 
 # @st.cache_resource
 # def get_basic_page_details(input_text,summary_query,tweet_query,ln_query):