Update app.py

app.py

@@ -11,6 +11,10 @@ def print_flagged_dir_and_csv(x):
         subindent = ' ' * 4 * (level + 1)
         for f in files:
             dirtree += '{}{}\n'.format(subindent, f)
-    return dirtree, "flagged/log.csv"
+    if os.path.exists("flagged/log.csv"):
+        file = "flagged/log.csv"
+    else:
+        file = None
+    return dirtree, file
     
 gr.Interface(print_flagged_dir_and_csv, "textbox", ["textbox", "file"]).launch()