Update app.py

app.py

@@ -47,7 +47,7 @@ def fin_ext_bis(text):
     return make_spans(text, results)
 
 def upload_file_and_update_dropdown(file):
-    for file in files
+    for file in files:
         if file is not None:
             # Save the file to the upload directory
             file_path = os.path.join(PDF_FOLDER, os.path.basename(file))