Update app.py

app.py

@@ -103,8 +103,8 @@ def main():
     ]
 
     st.markdown("Hi, I am Birute, chat assistant, based on republic of Lithuania law documents. You can choose below information retrieval type and how many documents you want to be retrieved.")
-    search_type = st.radio("Choose search type. Options are [Max marginal relevance search(mmr) , Similarity search (similarity). Default value (mmr)]", options=["mmr", "similarity"], value="mmr")
-    k = st.select_slider("Select amount of documents to be retrieved. Default value(5) : ", options=[2, 15], value=5)
+    search_type = st.radio("Choose search type. Options are [Max marginal relevance search(mmr) , Similarity search (similarity). Default value (mmr)]", options=["mmr", "similarity"], index ="mmr")
+    k = st.select_slider("Select amount of documents to be retrieved. Default value(5) : ", options=[2, 15], index = 5)
     retriever = create_retriever_from_chroma(vectorstore_path="docs/chroma/", search_type=search_type, k=k, chunk_size=450, chunk_overlap=20)
     
     if user_question := st.text_input("Ask a question about your documents:"):