Update app.py

app.py

@@ -143,7 +143,7 @@ def convert_ci(by_line_item_file, combined_file, password):
             merged_df[col] = ""
     merged_df = merged_df[column_order]
 
-    # Save merged output partitioned into 998-row chunks 
+    # Save merged output partitioned into 351-row chunks 
     max_rows = 350
     outputs = []
 
@@ -153,9 +153,13 @@ def convert_ci(by_line_item_file, combined_file, password):
         filename = f"{mawb} T01 Manifest - {suffix}.xlsx"
         with pd.ExcelWriter(filename, engine='openpyxl') as writer:
             chunk.to_excel(writer, sheet_name="Converted", index=False)
-            for column_cells in writer.sheets['Converted'].columns:
-                max_length = max(len(str(cell.value)) if cell.value is not None else 0 for cell in column_cells)
-                writer.sheets['Converted'].column_dimensions[column_cells[0].column_letter].width = max_length + 2
+            worksheet = writer.sheets['Converted']
+        for column_cells in worksheet.columns:
+            max_length = max(len(str(cell.value)) if cell.value is not None else 0 for cell in column_cells)
+            col_letter = column_cells[0].column_letter
+            worksheet.column_dimensions[col_letter].width = max_length + 2
+            for cell in column_cells:
+                cell.number_format = "@"
         outputs.append(filename)
 
     return outputs