f

app.py

@@ -17,8 +17,11 @@ import numpy as np
 st.set_page_config(layout="wide")
 
 started = 'started' in st.session_state
-st.session_state.em = "mm"
 
+if 'retriever' not in st.session_state:
+    st.session_state.em = "mm"
+
+    
 if started:
     retriever = st.session_state.retriever
     rag_chain = st.session_state.rag_chain    
@@ -117,6 +120,6 @@ if submit_button:
 if 'retriever' not in st.session_state:
     exec(open('start.py').read())
 
-
+