diff --git a/paddle_hub/utils.py b/paddle_hub/utils.py
new file mode 100755
index 0000000000000000000000000000000000000000..43b1aa8c08e00503785d88afc0ae80b4ab9e3841
--- /dev/null
+++ b/paddle_hub/utils.py
@@ -0,0 +1,27 @@
+#   Copyright (c) 2019  PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# coding=utf-8
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+
+def to_list(input):
+    if not isinstance(input, list):
+        if not isinstance(input, tuple):
+            input = [input]
+
+    return input