Update app.py

app.py

@@ -4,6 +4,10 @@ import sqlite3
 import numpy as np
 import pandas as pd
 
+#initialize chat history
+if messages not in st.session_state():
+    st.session_state.messages=[]
+    
 
 ## Function to read SQL data
 def read_sql_query(sql, db):
@@ -35,10 +39,28 @@ if i_pwd=='password':
     
     create_table_statement= "CREATE TABLE  car_sales (Manufacturer text, Model text, Sales_in_thousands float, __year_resale_value float, Vehicle_type text, Price_in_thousands float, Engine_size float, Horsepower float, Wheelbase float, Width float, Length float, Curb_weight float, Fuel_capacity float, Fuel_efficiency float, Latest_Launch text, Power_perf_factor float)"
 
+    # display chat messages from history
+    for message in st.session_state.messages:
+        with st.chat_message(message['role']):
+            st.markdown(message['content'])
+        
+
+    
     # Step 1: User input
     with st.chat_message(name= 'assistant'):
-        st.write('Ask question and press Enter')
-    user_query = st.text_input("")
+        st.markdown('Ask question and press Enter')
+        st.session_state.messages.append({"role":"assistant", "content": 'Ask question and press Enter' })
+
+    user_query= st.chat_input('')
+    if user_query:
+        with st.chat_message('user'):
+            st.markdown(user_query)
+
+        st.session_state.messages.append({"role":"user", "content": user_query })
+
+        
+        
+    #user_query = st.text_input("")
 
     # Step 2: Backend processing on Enter
     if  user_query: