Refactor get_hub_path to manage hub directory and ensure clean downloads

gradio_interface.py

@@ -2,14 +2,31 @@ import gradio as gr
 import json
 from datetime import datetime, timezone, timedelta
 from huggingface_hub import upload_file, snapshot_download
+import shutil
+import os
+from pathlib import Path
+
 SUBMISSION_REPO = "SushantGautam/medvqa-submissions"
+hub_dir = None
 
 
 def get_hub_path():
-    return snapshot_download(repo_id=SUBMISSION_REPO, allow_patterns=['*.json'])
+    global hub_dir
+    if hub_dir and Path(hub_dir).exists():
+        shutil.rmtree(hub_dir, ignore_errors=True)
+
+    hub_path = snapshot_download(
+        repo_id=SUBMISSION_REPO, allow_patterns=['*.json'])
+    hub_dir = os.path.dirname(hub_path)  # More robust than split
+    return hub_path
 
 
+hub_path = get_hub_path()
+
 print(f"{SUBMISSION_REPO} downloaded to {get_hub_path()}")
+# remove strings after snapshot in hub_path
+hub_dir = hub_path.split("snapshot")[0] + "snapshot"
+
 
 submissions = [
     {"user": "User1", "task": "task1", "submitted_time": datetime.now() -