Update app.py

app.py

@@ -142,7 +142,7 @@ if 'max_new_tokens' not in st.session_state:
     st.session_state['max_new_tokens'] =  500 # max tokens generated by LLM
 
  
-# This is the list of countries present in the vector store, since the vector store is previously prepared as they take very long to prepare
+# This is the list of countries present in the pre-built vector store, since the vector store is previously prepared as they take very long to prepare
 # This is for the RetrievalQA tool later to check, because even if the country given to it is not in the vector store, 
 # it would still filter the vector store with this country and give an empty result, instead of giving an error. 
 # We have to manually return the error to let the agent using the tool know.
@@ -456,15 +456,19 @@ if page == "Chat Config":
 # to override existing data on new scraped data or new pdf uploaded
 if page == "Document, Retriever, Web Scraping Config":
     st.header(page)
-    st.session_state['chunk_size'] = st.selectbox(
-        "Chunk Size", 
-        options=[500, 600, 700, 800, 900, 1000, 1250, 1500, 1750, 2000, 2250, 2500, 2750, 3000], 
-        on_change=get_retrievers
+
+    st.selectbox(
+            "Chunk Size", 
+            options=[500, 600, 700, 800, 900, 1000, 1250, 1500, 1750, 2000, 2250, 2500, 2750, 3000], 
+            on_change=get_retrievers,
+            key="chunk_size"
         )
-    st.session_state['chunk_overlap'] = st.selectbox(
-        "Chunk Overlap", 
-        options=[50, 100, 150, 200],
-        on_change=get_retrievers
+    
+    st.selectbox(
+            "Chunk Overlap", 
+            options=[50, 100, 150, 200],
+            on_change=get_retrievers,
+            key="chunk_overlap"
         )