Update app.py

app.py

@@ -40,7 +40,8 @@ def respond(
 
     print(system_message)
     
-    retriever = vector_db.as_retriever(search_type="similarity_score_threshold", search_kwargs={"score_threshold": score})
+    #retriever = vector_db.as_retriever(search_type="similarity_score_threshold", search_kwargs={"score_threshold": score})
+    retriever = vectordb.as_retriever(search_type="mmr")
     documents = retriever.invoke(message)
 
     spacer = " \n"