Update app.py

app.py

@@ -25,7 +25,13 @@ def install_browsergym():
         
         # Verify BrowserGym is importable
         try:
-            import browsergym.core
+            from browsergym.core.action.highlevel import HighLevelActionSet
+            from browsergym.utils.obs import (
+                flatten_axtree_to_str,
+                flatten_dom_to_str,
+                prune_html,
+            )
+            from browsergym.experiments import Agent
             print("BrowserGym successfully imported")
         except ImportError as e:
             print(f"BrowserGym import verification failed: {e}")