Update app.py

app.py

@@ -30,13 +30,14 @@ leaderboard = pn.pane.DataFrame(pd.DataFrame(), width=600)
 import tempfile
 
 temp_dir = tempfile.gettempdir()
-submission_path = os.path.join(temp_dir, filename)
+
 def submit_file(event):
     if file_input.value is None:
         status.object = "⚠️ Please upload a .zip file before submitting."
         return
 
     try:
+        submission_path = os.path.join(temp_dir, filename)
         drive_file_id = upload_to_drive(submission_path, filename)
         status.object = f"✅ Uploaded to Google Drive [File ID: {drive_file_id}]"
     except Exception as e: