add history

app.py

@@ -17,18 +17,28 @@ data = {
     "city": ["athens", "paris", "st. louis", "athens", "beijing", "london"]
 }
 table = pd.DataFrame(data)
-table = table.astype(str)  # Ensure all values are strings
+table = table.astype(str)  #ensure all values are strings
 
-# Streamlit app layout
 st.title("Table Question Answering")
 st.write("### Input Table")
 st.dataframe(table)
 
-# User query
 query = st.text_input("Ask a question about the table:", "In which year did beijing host the Olympic Games?")
 
+if "history" not in st.session_state:
+    st.session_state.history = []
+
 # Process query and display result
 if st.button("Get Answer"):
     result = pipe(table=table, query=query)
+    st.session_state.history.append({"query": query, "answer": result["answer"]})
     st.write("### Answer")
     st.write(result["answer"])
+
+#show history
+if st.session_state.history:
+    st.write("### Previous Questions and Answers")
+    for item in st.session_state.history:
+        st.write(f"**Q:** {item['query']}")
+        st.write(f"**A:** {item['answer']}")
+        st.write("---")