diff --git a/tutorials/notebook/mindinsight/calculate_and_datagraphic.ipynb b/tutorials/notebook/mindinsight/calculate_and_datagraphic.ipynb
index 851f8bf57756288ebf377e2e50a9be97626b9427..5473e1dfa35c82fddd77e30273d36ea84a744740 100644
--- a/tutorials/notebook/mindinsight/calculate_and_datagraphic.ipynb
+++ b/tutorials/notebook/mindinsight/calculate_and_datagraphic.ipynb
@@ -77,6 +77,7 @@
     "import urllib.request   \n",
     "from urllib.parse import urlparse\n",
     "import gzip \n",
+    "import os\n",
     "\n",
     "def unzip_file(gzip_path):\n",
     "    \"\"\"unzip dataset file\n",