Update vehicleid.py

Author: zzw-zwzhang

openunreid/data/datasets/vehicleid.py

@@ -33,6 +33,7 @@ def __init__(
         self, root, mode, val_split=0.2, test_size=800, del_labels=False, **kwargs
     ):
         self.root = osp.abspath(osp.expanduser(root))
+        self.model = mode
         self.dataset_dir = osp.join(self.root, self.dataset_dir)
         self.del_labels = del_labels
         self.download_dataset(self.dataset_dir, self.dataset_url)