Update app.py

app.py

@@ -143,6 +143,8 @@ retrieved_doc_list = []
 
 
 if st.button('Submit'):
+    if 'retrieve_clicked' not in st.session_state:
+        st.session_state.retrieve_clicked = False    
     # for item, ret_item in zip(list_1, retrieved_out):
     for item in list_1:
         for key in item['ref_abstract']: