update

app.py

@@ -108,12 +108,20 @@ values = st.text_area("Company Values", value="innovation, teamwork, transparenc
 batch_size = st.number_input("Batch Size", min_value=1, max_value=100, value=10)
 repeat_times = st.number_input("Number of Batches", min_value=1, max_value=10, value=1)
 
+
 def to_excel(df):
     output = BytesIO()
-    writer = pd.ExcelWriter(output, engine='xlsxwriter')
-    df.to_excel(writer, index=False, sheet_name='Potshots')
-    writer.save()
+
+    # Use the 'with' statement to handle the file writer and ensure proper closure
+    with pd.ExcelWriter(output, engine='xlsxwriter') as writer:
+        df.to_excel(writer, index=False, sheet_name='Potshots')
+
+    # Get the processed data from the buffer
     processed_data = output.getvalue()
+
+    # Reset the buffer for safety (useful if this is reused)
+    output.seek(0)
+
     return processed_data