diff --git a/tools/utils/inference.py b/tools/utils/inference.py
index 50f154be..831ba9e9 100644
--- a/tools/utils/inference.py
+++ b/tools/utils/inference.py
@@ -74,7 +74,7 @@ def __init__(self, model: List or AnyStr or Tuple):
                 )
             inter = tf.lite.Interpreter
             net = inter(model)
-            self._input_shape = list(net.get_input_details()[0]['shape'][1:])
+            self._input_shape = tuple(net.get_input_details()[0]['shape'][1:])
             net.allocate_tensors()
             self.engine = 'tf'
         else:
@@ -280,7 +280,8 @@ def __init__(
 
     def init(self, cfg):
         self.evaluator: Evaluator = self.runner.build_evaluator(self.cfg.get('val_evaluator'))
-        self.evaluator.dataset_meta = self.dataloader.dataset.METAINFO
+        if hasattr(self.dataloader, 'dataset'):
+            self.evaluator.dataset_meta = self.dataloader.dataset.METAINFO
         if hasattr(cfg.model, 'data_preprocessor'):
             self.data_preprocess = MODELS.build(cfg.model.data_preprocessor)