folder.parent

main.py

@@ -47,7 +47,7 @@ def files_in_folder(path: str):
 
     res.loc[-1] = [
         (
-            f"<a href=/files/{path / '..'}/>..</a>",
+            f"<a href=/files/{folder.parent}/>..</a>",
             "",
             "",
             True,