Update app.py

app.py

@@ -5,6 +5,7 @@ import pandas as pd
 import time
 import random
 from datetime import datetime
+import io
 
 # Set page configuration
 st.set_page_config(
@@ -275,30 +276,14 @@ if df is not None and not df.empty:
     # Display the data
     st.dataframe(filtered_df, use_container_width=True)
     
-    # Download buttons
-    col1, col2 = st.columns(2)
-    with col1:
-        csv = filtered_df.to_csv(index=False).encode('utf-8-sig')
-        st.download_button(
-            label="下載為CSV",
-            data=csv,
-            file_name="twse_announcements.csv",
-            mime="text/csv",
-        )
-    with col2:
-        excel_buffer = pd.ExcelWriter("twse_announcements.xlsx", engine='xlsxwriter')
-        filtered_df.to_excel(excel_buffer, index=False, sheet_name='公告資料')
-        excel_buffer.close()
-        
-        with open("twse_announcements.xlsx", "rb") as f:
-            excel_data = f.read()
-        
-        st.download_button(
-            label="下載為Excel",
-            data=excel_data,
-            file_name="twse_announcements.xlsx",
-            mime="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-        )
+    # Download as CSV
+    csv = filtered_df.to_csv(index=False).encode('utf-8-sig')
+    st.download_button(
+        label="下載為CSV",
+        data=csv,
+        file_name="twse_announcements.csv",
+        mime="text/csv",
+    )
     
     # Display statistics
     st.subheader("資料統計")
@@ -367,5 +352,5 @@ with st.expander("常見問題", expanded=False):
 
 # Add version info
 st.sidebar.markdown("---")
-st.sidebar.caption("版本: 1.1.0")
+st.sidebar.caption("版本: 1.1.1")
 st.sidebar.caption("最後更新: 2025-04-01")