Update app.py

app.py

@@ -519,7 +519,7 @@ def generate_pdf_content(summary, preview_df, anomalies, amc_reminders, insights
         logging.info(f"PDF generated at {pdf_path}")
         return pdf_path
     except Exception as e:
-        logging.error(f"Failed to generate PDF: {str(e)}")
+        logging.error(f"Failed to generate PDF: {str(e)}. Check input data or reportlab configuration.")
         return None
 
 # Main processing function
@@ -633,12 +633,15 @@ async def process_logs(file_obj, lab_site_filter, equipment_type_filter, date_ra
 # Generate PDF separately
 async def generate_pdf(summary, preview_html, usage_chart, device_cards, daily_log_chart, weekly_uptime_chart, anomaly_alerts_chart, downtime_chart, anomalies, amc_reminders, insights):
     try:
-        preview_df = pd.read_html(preview_html)[0]
+        preview_df = pd.read_html(preview_html)[0] if preview_html else pd.DataFrame()
         pdf_file = generate_pdf_content(summary, preview_df, anomalies, amc_reminders, insights, device_cards, daily_log_chart, weekly_uptime_chart, anomaly_alerts_chart, downtime_chart)
+        if pdf_file is None:
+            logging.warning("PDF generation failed or disabled.")
+            return "PDF generation failed. Check logs for details."
         return pdf_file
     except Exception as e:
         logging.error(f"Failed to generate PDF: {str(e)}")
-        return None
+        return f"Error generating PDF: {str(e)}"
 
 # Update filters
 def update_filters(file_obj, current_file_state):
@@ -736,7 +739,10 @@ try:
                         insights_output = gr.Markdown()
                     with gr.Group(elem_classes="dashboard-section"):
                         gr.Markdown("### Export Report")
-                        pdf_output = gr.File(label="Download Status Report as PDF")
+                        pdf_output = gr.Markdown()
+                        if not reportlab_available:
+                            gr.Markdown("**Note:** PDF export is unavailable because the 'reportlab' library is not installed.")
+                        pdf_file_output = gr.File(label="Download Status Report as PDF")
 
         file_input.change(
             fn=update_filters,
@@ -754,7 +760,7 @@ try:
         pdf_button.click(
             fn=generate_pdf,
             inputs=[summary_output, preview_output, usage_chart_output, device_cards_output, daily_log_trends_output, weekly_uptime_output, anomaly_alerts_output, downtime_chart_output, anomaly_output, amc_output, insights_output],
-            outputs=[pdf_output]
+            outputs=[pdf_output, pdf_file_output]
         )
 
         logging.info("Gradio interface initialized successfully")