Update app.py

app.py

@@ -299,6 +299,7 @@ class FeatureEncoder:
             intercepted = getattr(_thread_local, 'interception', None)
             
             # --- 2. Student 更新与特征生成 ---
+            print(event_str)
             cans = ps_student.update(event_str)
             
             if intercepted is None or not cans.can_act: