Update app.py

app.py

@@ -1369,8 +1369,8 @@ def create_pdf(cname,ename,account_number, directory):
         page.merge_page(page)  # Flatten content
         writer.add_page(page)
 
-    with open(output_file_name, "wb") as output_file_name:
-        writer.write(output_file_name)
+    with open(output_file_name, "wb") as f:
+        writer.write(f)