Update app.py

app.py

@@ -6,7 +6,8 @@ from fpdf import FPDF
 import tempfile
 import re
 import logging
-from concurrent.futures import ThreadPoolExecutor  # Add this line
+from concurrent.futures import ThreadPoolExecutor, as_completed
+
 
 logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger(__name__)