fix __future__ import

app.py

@@ -1,3 +1,4 @@
+from __future__ import annotations
 from dataclasses import dataclass
 import pickle
 import os
@@ -135,7 +136,6 @@ from nlp4web_codebase.ir.data_loaders.sciq import load_sciq
 sciq = load_sciq()
 counting = run_counting(documents=iter(sciq.corpus), ndocs=len(sciq.corpus))
 
-from __future__ import annotations
 from dataclasses import asdict, dataclass
 import math
 import os